Mercurial > projects > ldc
annotate lphobos/gc/gcx.d @ 1021:d1ec9ff0e9ba
Implemented basic -m32 and -m64 options.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
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date | Sun, 01 Mar 2009 22:27:03 +0100 |
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1 /** |
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2 * This module contains the garbage collector implementation. |
131 | 3 * |
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4 * Copyright: Copyright (C) 2001-2007 Digital Mars, www.digitalmars.com. |
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5 * All rights reserved. |
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6 * License: |
131 | 7 * This software is provided 'as-is', without any express or implied |
8 * warranty. In no event will the authors be held liable for any damages | |
9 * arising from the use of this software. | |
10 * | |
11 * Permission is granted to anyone to use this software for any purpose, | |
12 * including commercial applications, and to alter it and redistribute it | |
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13 * freely, in both source and binary form, subject to the following |
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14 * restrictions: |
131 | 15 * |
16 * o The origin of this software must not be misrepresented; you must not | |
17 * claim that you wrote the original software. If you use this software | |
18 * in a product, an acknowledgment in the product documentation would be | |
19 * appreciated but is not required. | |
20 * o Altered source versions must be plainly marked as such, and must not | |
21 * be misrepresented as being the original software. | |
22 * o This notice may not be removed or altered from any source | |
23 * distribution. | |
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24 * Authors: Walter Bright, David Friedman, Sean Kelly |
131 | 25 */ |
26 | |
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27 /* NOTE: This file has been patched from the original DMD distribution to |
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28 work with the GDC compiler. |
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29 |
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30 Modified by David Friedman, July 2006 |
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31 */ |
131 | 32 |
33 module gcx; | |
34 | |
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35 // D Garbage Collector implementation |
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36 |
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37 /************** Debugging ***************************/ |
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38 |
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39 //debug = PRINTF; // turn on printf's |
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40 //debug = COLLECT_PRINTF; // turn on printf's |
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41 //debug = THREADINVARIANT; // check thread integrity |
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42 //debug = LOGGING; // log allocations / frees |
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43 //debug = MEMSTOMP; // stomp on memory |
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44 //debug = SENTINEL; // add underrun/overrrun protection |
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45 //debug = PTRCHECK; // more pointer checking |
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46 //debug = PTRCHECK2; // thorough but slow pointer checking |
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47 |
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48 /*************** Configuration *********************/ |
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49 |
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50 version = STACKGROWSDOWN; // growing the stack means subtracting from the stack pointer |
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51 // (use for Intel X86 CPUs) |
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52 // else growing the stack means adding to the stack pointer |
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53 version = MULTI_THREADED; // produce multithreaded version |
131 | 54 |
55 /***************************************************/ | |
56 | |
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57 private import gcbits; |
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58 private import gcstats; |
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59 |
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60 private import cstdlib = std.c.stdlib : calloc, free, malloc, realloc; |
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61 private import cstring = std.c.string : memcpy, memmove, memset; |
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62 |
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63 debug private import std.c.stdio; |
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64 |
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65 import std.outofmemory; |
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66 import std.gc; |
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67 |
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68 version (GNU) |
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69 { |
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70 private import gcc.builtins; |
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71 } |
131 | 72 |
73 version (Win32) | |
74 { | |
75 import win32; | |
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76 import std.c.windows.windows; |
131 | 77 } |
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78 else version (GNU) |
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79 { |
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80 private import gcgcc; |
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81 } |
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82 else version (linux) |
131 | 83 { |
84 import gclinux; | |
85 } | |
86 | |
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87 /*version (BigEndian) |
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88 private import std.intrinsic;*/ |
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89 |
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90 |
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91 |
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92 version (MULTI_THREADED) |
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93 { |
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94 import std.thread; |
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95 } |
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96 |
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97 |
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98 private void onOutOfMemoryError() |
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99 { |
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100 _d_OutOfMemory(); |
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101 } |
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102 |
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103 private void* rt_stackBottom() |
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104 { |
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105 version (Win32) |
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106 { |
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107 return win32.os_query_stackBottom(); |
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108 } |
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109 else version (GNU) |
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110 { |
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111 return gcgcc.os_query_stackBottom(); |
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112 } |
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113 else version (linux) |
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114 { |
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115 return gclinux.os_query_stackBottom(); |
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116 } |
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117 } |
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118 |
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119 private bool thread_needLock() |
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120 { |
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121 return std.thread.Thread.nthreads != 1; |
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122 } |
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123 |
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124 |
131 | 125 alias GC gc_t; |
126 | |
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127 version (X86) version (D_InlineAsm) { version = Asm86; } |
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128 |
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129 |
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130 /* ======================= Leak Detector =========================== */ |
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131 |
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132 |
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133 debug (LOGGING) |
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134 { |
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135 struct Log |
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136 { |
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137 void* p; |
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138 size_t size; |
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139 uint line; |
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140 char* file; |
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141 void* parent; |
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142 |
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143 void print() |
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144 { |
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145 printf(" p = %x, size = %d, parent = %x ", p, size, parent); |
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146 if (file) |
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147 { |
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148 printf("%s(%u)", file, line); |
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149 } |
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150 printf("\n"); |
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151 } |
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152 } |
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153 |
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154 |
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155 struct LogArray |
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156 { |
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157 size_t dim; |
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158 size_t allocdim; |
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159 Log *data; |
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160 |
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161 void Dtor() |
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162 { |
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163 if (data) |
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164 cstdlib.free(data); |
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165 data = null; |
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166 } |
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167 |
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168 void reserve(size_t nentries) |
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169 { |
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170 assert(dim <= allocdim); |
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171 if (allocdim - dim < nentries) |
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172 { |
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173 allocdim = (dim + nentries) * 2; |
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174 assert(dim + nentries <= allocdim); |
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175 if (!data) |
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176 { |
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177 data = cast(Log *)cstdlib.malloc(allocdim * Log.sizeof); |
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178 if (!data && allocdim) |
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179 onOutOfMemoryError(); |
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180 } |
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181 else |
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182 { Log *newdata; |
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183 |
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184 newdata = cast(Log *)cstdlib.malloc(allocdim * Log.sizeof); |
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185 if (!newdata && allocdim) |
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186 onOutOfMemoryError(); |
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187 cstring.memcpy(newdata, data, dim * Log.sizeof); |
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188 cstdlib.free(data); |
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189 data = newdata; |
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190 } |
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191 } |
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192 } |
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193 |
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194 |
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195 void push(Log log) |
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196 { |
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197 reserve(1); |
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198 data[dim++] = log; |
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199 } |
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200 |
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201 void remove(size_t i) |
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202 { |
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203 cstring.memmove(data + i, data + i + 1, (dim - i) * Log.sizeof); |
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204 dim--; |
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205 } |
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206 |
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207 |
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208 size_t find(void *p) |
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209 { |
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210 for (size_t i = 0; i < dim; i++) |
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211 { |
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212 if (data[i].p == p) |
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213 return i; |
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214 } |
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215 return ~0u; // not found |
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216 } |
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217 |
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218 |
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219 void copy(LogArray *from) |
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220 { |
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221 reserve(from.dim - dim); |
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222 assert(from.dim <= allocdim); |
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223 cstring.memcpy(data, from.data, from.dim * Log.sizeof); |
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224 dim = from.dim; |
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225 } |
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226 } |
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227 } |
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228 |
131 | 229 |
230 /* ============================ GC =============================== */ | |
231 | |
232 | |
233 alias void (*GC_FINALIZER)(void *p, bool dummy); | |
234 | |
473
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235 class GCLock { } // just a dummy so we can get a global lock |
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236 |
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237 |
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238 const uint GCVERSION = 1; // increment every time we change interface |
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239 // to GC. |
131 | 240 |
241 class GC | |
242 { | |
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243 // For passing to debug code |
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244 static size_t line; |
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245 static char* file; |
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246 |
131 | 247 uint gcversion = GCVERSION; |
248 | |
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249 Gcx *gcx; // implementation |
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250 static ClassInfo gcLock; // global lock |
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251 |
131 | 252 |
253 void initialize() | |
254 { | |
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255 gcLock = GCLock.classinfo; |
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256 gcx = cast(Gcx *)cstdlib.calloc(1, Gcx.sizeof); |
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257 if (!gcx) |
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258 onOutOfMemoryError(); |
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259 printf("GCX set to %p\n", gcx); |
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260 gcx.initialize(); |
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261 setStackBottom(rt_stackBottom()); |
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262 } |
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263 |
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264 |
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265 void Dtor() |
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266 { |
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267 version (linux) |
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268 { |
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269 //debug(PRINTF) printf("Thread %x ", pthread_self()); |
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270 //debug(PRINTF) printf("GC.Dtor()\n"); |
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271 } |
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272 |
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273 if (gcx) |
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274 { |
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275 gcx.Dtor(); |
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276 cstdlib.free(gcx); |
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277 gcx = null; |
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278 } |
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279 } |
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280 |
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281 |
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282 invariant() |
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283 { |
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284 if (gcx) |
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285 { |
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286 gcx.thread_Invariant(); |
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287 } |
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288 } |
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289 |
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290 |
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291 /** |
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292 * |
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293 */ |
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294 void enable() |
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295 { |
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296 if (!thread_needLock()) |
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297 { |
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298 assert(gcx.disabled > 0); |
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299 gcx.disabled--; |
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300 } |
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301 else synchronized (gcLock) |
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302 { |
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303 assert(gcx.disabled > 0); |
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304 gcx.disabled--; |
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305 } |
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306 } |
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307 |
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308 |
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309 /** |
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310 * |
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311 */ |
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312 void disable() |
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313 { |
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314 if (!thread_needLock()) |
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315 { |
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316 gcx.disabled++; |
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317 } |
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318 else synchronized (gcLock) |
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319 { |
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320 gcx.disabled++; |
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321 } |
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322 } |
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323 |
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324 |
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325 /** |
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326 * |
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327 */ |
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328 void *malloc(size_t size) |
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329 { |
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330 if (!size) |
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331 { |
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332 return null; |
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333 } |
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334 |
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335 if (!thread_needLock()) |
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336 { |
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337 return mallocNoSync(size); |
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338 } |
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339 else synchronized (gcLock) |
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340 { |
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341 return mallocNoSync(size); |
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342 } |
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343 } |
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344 |
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345 |
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346 // |
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347 // |
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348 // |
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349 private void *mallocNoSync(size_t size) |
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350 { |
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351 assert(size != 0); |
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352 |
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353 void *p = null; |
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354 Bins bin; |
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355 |
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356 //debug(PRINTF) printf("GC::malloc(size = %d, gcx = %p)\n", size, gcx); |
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357 assert(gcx); |
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358 //debug(PRINTF) printf("gcx.self = %x, pthread_self() = %x\n", gcx.self, pthread_self()); |
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359 size += SENTINEL_EXTRA; |
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360 |
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361 // Compute size bin |
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362 // Cache previous binsize lookup - Dave Fladebo. |
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363 static size_t lastsize = -1; |
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364 static Bins lastbin; |
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365 if (size == lastsize) |
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366 bin = lastbin; |
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367 else |
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368 { |
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369 bin = gcx.findBin(size); |
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370 lastsize = size; |
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371 lastbin = bin; |
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372 } |
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373 |
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374 if (bin < B_PAGE) |
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375 { |
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376 p = gcx.bucket[bin]; |
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377 if (p == null) |
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378 { |
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379 if (!gcx.allocPage(bin) && !gcx.disabled) // try to find a new page |
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380 { |
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381 if (!thread_needLock()) |
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382 { |
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383 /* Then we haven't locked it yet. Be sure |
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384 * and lock for a collection, since a finalizer |
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385 * may start a new thread. |
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386 */ |
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387 synchronized (gcLock) |
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388 { |
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389 gcx.fullcollectshell(); |
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390 } |
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391 } |
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392 else if (!gcx.fullcollectshell()) // collect to find a new page |
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393 { |
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394 //gcx.newPool(1); |
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395 } |
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396 } |
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397 if (!gcx.bucket[bin] && !gcx.allocPage(bin)) |
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398 { int result; |
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399 |
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400 gcx.newPool(1); // allocate new pool to find a new page |
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401 result = gcx.allocPage(bin); |
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402 if (!result) |
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403 return null; |
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404 } |
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405 p = gcx.bucket[bin]; |
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406 } |
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407 |
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408 // Return next item from free list |
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409 gcx.bucket[bin] = (cast(List *)p).next; |
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410 cstring.memset(p + size, 0, binsize[bin] - size); |
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411 //debug(PRINTF) printf("\tmalloc => %x\n", p); |
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412 debug (MEMSTOMP) cstring.memset(p, 0xF0, size); |
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413 } |
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414 else |
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415 { |
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416 p = gcx.bigAlloc(size); |
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417 if (!p) |
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418 return null; |
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419 } |
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420 size -= SENTINEL_EXTRA; |
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421 p = sentinel_add(p); |
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422 sentinel_init(p, size); |
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423 gcx.log_malloc(p, size); |
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424 return p; |
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425 } |
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426 |
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427 |
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428 /** |
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429 * |
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430 */ |
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431 void *calloc(size_t size, size_t n) |
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432 { |
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433 size_t len = size * n; |
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434 |
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435 if (!len) |
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436 { |
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437 return null; |
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438 } |
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439 |
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440 if (!thread_needLock()) |
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441 { |
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442 return callocNoSync(len); |
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443 } |
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444 else synchronized (gcLock) |
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445 { |
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446 return callocNoSync(len); |
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447 } |
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448 } |
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449 |
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450 |
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451 // |
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452 // |
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453 // |
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454 private void *callocNoSync(size_t size) |
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455 { |
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456 assert(size != 0); |
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457 |
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458 void *p = mallocNoSync(size); |
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459 if (p) |
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460 { //debug(PRINTF) printf("calloc: %x len %d\n", p, len); |
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461 cstring.memset(p, 0, size); |
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462 } |
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463 return p; |
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464 } |
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465 |
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466 |
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467 /** |
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468 * |
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469 */ |
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470 void *realloc(void *p, size_t size) |
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471 { |
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472 if (!thread_needLock()) |
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473 { |
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474 return reallocNoSync(p, size); |
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475 } |
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476 else synchronized (gcLock) |
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477 { |
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478 return reallocNoSync(p, size); |
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479 } |
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480 } |
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481 |
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482 |
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483 // |
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484 // |
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485 // |
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486 private void *reallocNoSync(void *p, size_t size) |
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487 { |
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488 gcx.p_cache = null; |
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489 if (!size) |
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490 { if (p) |
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491 { freeNoSync(p); |
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492 p = null; |
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493 } |
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494 } |
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495 else if (!p) |
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496 { |
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497 p = mallocNoSync(size); |
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498 } |
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499 else |
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500 { void *p2; |
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501 size_t psize; |
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502 |
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503 //debug(PRINTF) printf("GC::realloc(p = %x, size = %u)\n", p, size); |
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504 version (SENTINEL) |
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505 { |
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506 sentinel_Invariant(p); |
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507 psize = *sentinel_size(p); |
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508 if (psize != size) |
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|
509 { |
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diff
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510 p2 = mallocNoSync(size); |
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511 if (psize < size) |
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512 size = psize; |
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513 //debug(PRINTF) printf("\tcopying %d bytes\n",size); |
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514 cstring.memcpy(p2, p, size); |
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515 p = p2; |
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516 } |
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diff
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517 } |
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518 else |
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diff
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|
519 { |
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520 psize = gcx.findSize(p); // find allocated size |
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521 if (psize >= PAGESIZE && size >= PAGESIZE) |
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|
522 { |
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523 auto psz = psize / PAGESIZE; |
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diff
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524 auto newsz = (size + PAGESIZE - 1) / PAGESIZE; |
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525 if (newsz == psz) |
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526 return p; |
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|
527 |
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528 auto pool = gcx.findPool(p); |
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529 auto pagenum = (p - pool.baseAddr) / PAGESIZE; |
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131
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530 |
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|
531 if (newsz < psz) |
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532 { // Shrink in place |
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533 synchronized (gcLock) |
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|
534 { |
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535 debug (MEMSTOMP) cstring.memset(p + size, 0xF2, psize - size); |
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536 pool.freePages(pagenum + newsz, psz - newsz); |
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537 } |
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538 return p; |
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539 } |
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540 else if (pagenum + newsz <= pool.npages) |
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541 { |
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542 // Attempt to expand in place |
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543 synchronized (gcLock) |
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544 { |
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545 for (size_t i = pagenum + psz; 1;) |
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546 { |
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547 if (i == pagenum + newsz) |
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548 { |
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549 debug (MEMSTOMP) cstring.memset(p + psize, 0xF0, size - psize); |
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550 cstring.memset(&pool.pagetable[pagenum + psz], B_PAGEPLUS, newsz - psz); |
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551 return p; |
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552 } |
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553 if (i == pool.ncommitted) |
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554 { |
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555 auto u = pool.extendPages(pagenum + newsz - pool.ncommitted); |
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556 if (u == ~0u) |
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557 break; |
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558 i = pagenum + newsz; |
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559 continue; |
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560 } |
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561 if (pool.pagetable[i] != B_FREE) |
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562 break; |
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563 i++; |
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564 } |
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565 } |
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566 } |
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567 } |
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568 if (psize < size || // if new size is bigger |
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569 psize > size * 2) // or less than half |
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570 { |
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571 p2 = mallocNoSync(size); |
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572 if (psize < size) |
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573 size = psize; |
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574 //debug(PRINTF) printf("\tcopying %d bytes\n",size); |
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575 cstring.memcpy(p2, p, size); |
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576 p = p2; |
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577 } |
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578 } |
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579 } |
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580 return p; |
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581 } |
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582 |
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583 |
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584 /** |
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585 * Attempt to in-place enlarge the memory block pointed to by p by at least |
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586 * minbytes beyond its current capacity, up to a maximum of maxsize. This |
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587 * does not attempt to move the memory block (like realloc() does). |
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588 * |
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589 * Returns: |
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590 * 0 if could not extend p, |
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591 * total size of entire memory block if successful. |
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592 */ |
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593 size_t extend(void* p, size_t minsize, size_t maxsize) |
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594 { |
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595 if (!thread_needLock()) |
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596 { |
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597 return extendNoSync(p, minsize, maxsize); |
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598 } |
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599 else synchronized (gcLock) |
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600 { |
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601 return extendNoSync(p, minsize, maxsize); |
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602 } |
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603 } |
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604 |
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605 |
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606 // |
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607 // |
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608 // |
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609 private size_t extendNoSync(void* p, size_t minsize, size_t maxsize) |
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610 in |
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611 { |
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612 assert( minsize <= maxsize ); |
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613 } |
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614 body |
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615 { |
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616 //debug(PRINTF) printf("GC::extend(p = %x, minsize = %u, maxsize = %u)\n", p, minsize, maxsize); |
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617 version (SENTINEL) |
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618 { |
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619 return 0; |
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620 } |
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621 auto psize = gcx.findSize(p); // find allocated size |
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622 if (psize < PAGESIZE) |
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623 return 0; // cannot extend buckets |
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624 |
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625 auto psz = psize / PAGESIZE; |
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626 auto minsz = (minsize + PAGESIZE - 1) / PAGESIZE; |
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627 auto maxsz = (maxsize + PAGESIZE - 1) / PAGESIZE; |
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628 |
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629 auto pool = gcx.findPool(p); |
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630 auto pagenum = (p - pool.baseAddr) / PAGESIZE; |
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631 |
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632 size_t sz; |
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633 for (sz = 0; sz < maxsz; sz++) |
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634 { |
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635 auto i = pagenum + psz + sz; |
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636 if (i == pool.ncommitted) |
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637 break; |
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638 if (pool.pagetable[i] != B_FREE) |
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639 { if (sz < minsz) |
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640 return 0; |
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641 break; |
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642 } |
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643 } |
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644 if (sz >= minsz) |
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645 { |
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646 } |
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647 else if (pagenum + psz + sz == pool.ncommitted) |
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648 { |
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649 auto u = pool.extendPages(minsz - sz); |
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650 if (u == ~0u) |
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651 return 0; |
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652 sz = minsz; |
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653 } |
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654 else |
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655 return 0; |
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656 debug (MEMSTOMP) cstring.memset(p + psize, 0xF0, (psz + sz) * PAGESIZE - psize); |
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657 cstring.memset(pool.pagetable + pagenum + psz, B_PAGEPLUS, sz); |
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658 gcx.p_cache = null; |
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659 gcx.size_cache = 0; |
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660 return (psz + sz) * PAGESIZE; |
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661 } |
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662 |
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663 |
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664 /** |
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665 * |
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666 */ |
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667 void free(void *p) |
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668 { |
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669 if (!p) |
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670 { |
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671 return; |
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672 } |
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673 |
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674 if (!thread_needLock()) |
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675 { |
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676 return freeNoSync(p); |
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677 } |
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678 else synchronized (gcLock) |
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679 { |
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680 return freeNoSync(p); |
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681 } |
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682 } |
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683 |
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684 |
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685 // |
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686 // |
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687 // |
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688 private void freeNoSync(void *p) |
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689 { |
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690 assert (p); |
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691 |
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692 Pool *pool; |
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693 uint pagenum; |
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694 Bins bin; |
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695 uint biti; |
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696 |
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697 // Find which page it is in |
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698 pool = gcx.findPool(p); |
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699 if (!pool) // if not one of ours |
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700 return; // ignore |
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701 sentinel_Invariant(p); |
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702 p = sentinel_sub(p); |
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703 pagenum = (p - pool.baseAddr) / PAGESIZE; |
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704 biti = cast(uint)(p - pool.baseAddr) / 16; |
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705 pool.noscan.clear(biti); |
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706 if (pool.finals.nbits && pool.finals.testClear(biti)) |
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707 gcx.rt_finalize(sentinel_add(p), false); |
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708 |
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709 gcx.p_cache = null; |
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710 bin = cast(Bins)pool.pagetable[pagenum]; |
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711 if (bin == B_PAGE) // if large alloc |
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712 { int npages; |
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713 uint n; |
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714 |
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715 // Free pages |
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716 npages = 1; |
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717 n = pagenum; |
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718 while (++n < pool.ncommitted && pool.pagetable[n] == B_PAGEPLUS) |
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719 npages++; |
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720 debug (MEMSTOMP) cstring.memset(p, 0xF2, npages * PAGESIZE); |
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721 pool.freePages(pagenum, npages); |
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722 } |
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723 else |
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724 { // Add to free list |
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725 List *list = cast(List *)p; |
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726 |
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727 debug (MEMSTOMP) cstring.memset(p, 0xF2, binsize[bin]); |
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728 |
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729 list.next = gcx.bucket[bin]; |
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730 gcx.bucket[bin] = list; |
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731 } |
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732 gcx.log_free(sentinel_add(p)); |
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733 } |
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|
734 |
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|
735 |
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736 /** |
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737 * Determine the allocated size of pointer p. If p is an interior pointer |
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738 * or not a gc allocated pointer, return 0. |
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739 */ |
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740 size_t capacity(void *p) |
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741 { |
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742 if (!p) |
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743 { |
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744 return 0; |
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745 } |
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746 |
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747 if (!thread_needLock()) |
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748 { |
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749 return sizeOfNoSync(p); |
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750 } |
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751 else synchronized (gcLock) |
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752 { |
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753 return sizeOfNoSync(p); |
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754 } |
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|
755 } |
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|
756 |
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|
757 |
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758 // |
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759 // |
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760 // |
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761 private size_t sizeOfNoSync(void *p) |
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762 { |
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763 assert (p); |
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|
764 |
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765 version (SENTINEL) |
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766 { |
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767 p = sentinel_sub(p); |
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768 size_t size = gcx.findSize(p); |
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|
769 |
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770 // Check for interior pointer |
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771 // This depends on: |
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772 // 1) size is a power of 2 for less than PAGESIZE values |
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773 // 2) base of memory pool is aligned on PAGESIZE boundary |
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774 if (cast(size_t)p & (size - 1) & (PAGESIZE - 1)) |
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775 size = 0; |
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776 return size ? size - SENTINAL_EXTRA : 0; |
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777 } |
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778 else |
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779 { |
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780 if (p !is null && p == gcx.p_cache) |
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781 return gcx.size_cache; |
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782 |
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783 size_t size = gcx.findSize(p); |
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784 |
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785 // Check for interior pointer |
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786 // This depends on: |
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787 // 1) size is a power of 2 for less than PAGESIZE values |
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788 // 2) base of memory pool is aligned on PAGESIZE boundary |
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789 if (cast(size_t)p & (size - 1) & (PAGESIZE - 1)) |
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790 size = 0; |
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791 else |
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792 { |
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793 gcx.p_cache = p; |
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794 gcx.size_cache = size; |
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795 } |
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796 |
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797 return size; |
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798 } |
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799 } |
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800 |
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801 |
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802 /** |
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803 * Verify that pointer p: |
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804 * 1) belongs to this memory pool |
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805 * 2) points to the start of an allocated piece of memory |
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806 * 3) is not on a free list |
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807 */ |
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808 void check(void *p) |
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809 { |
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810 if (!p) |
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811 { |
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812 return; |
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813 } |
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814 |
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815 if (!thread_needLock()) |
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816 { |
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817 checkNoSync(p); |
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818 } |
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819 else synchronized (gcLock) |
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820 { |
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821 checkNoSync(p); |
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822 } |
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823 } |
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824 |
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825 // |
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826 // |
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827 // |
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828 private void checkNoSync(void *p) |
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829 { |
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830 assert(p); |
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831 |
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832 sentinel_Invariant(p); |
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833 debug (PTRCHECK) |
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834 { |
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835 Pool* pool; |
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836 uint pagenum; |
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837 Bins bin; |
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838 size_t size; |
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839 |
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840 p = sentinel_sub(p); |
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841 pool = gcx.findPool(p); |
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842 assert(pool); |
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843 pagenum = (p - pool.baseAddr) / PAGESIZE; |
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844 bin = cast(Bins)pool.pagetable[pagenum]; |
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845 assert(bin <= B_PAGE); |
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846 size = binsize[bin]; |
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847 assert((cast(size_t)p & (size - 1)) == 0); |
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848 |
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849 debug (PTRCHECK2) |
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850 { |
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851 if (bin < B_PAGE) |
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852 { |
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853 // Check that p is not on a free list |
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854 List *list; |
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855 |
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856 for (list = gcx.bucket[bin]; list; list = list.next) |
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857 { |
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858 assert(cast(void *)list != p); |
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859 } |
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860 } |
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861 } |
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862 } |
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863 } |
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864 |
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865 |
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866 // |
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867 // |
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868 // |
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869 private void setStackBottom(void *p) |
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870 { |
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871 version (STACKGROWSDOWN) |
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872 { |
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873 //p = (void *)((uint *)p + 4); |
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874 if (p > gcx.stackBottom) |
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875 { |
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876 //debug(PRINTF) printf("setStackBottom(%x)\n", p); |
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877 gcx.stackBottom = p; |
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878 } |
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879 } |
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880 else |
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881 { |
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882 //p = (void *)((uint *)p - 4); |
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883 if (p < gcx.stackBottom) |
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884 { |
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885 //debug(PRINTF) printf("setStackBottom(%x)\n", p); |
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886 gcx.stackBottom = cast(char *)p; |
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887 } |
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888 } |
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|
889 } |
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|
890 |
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891 |
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892 static void scanStaticData(gc_t g) |
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893 { |
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894 void *pbot; |
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895 void *ptop; |
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896 size_t nbytes; |
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897 |
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898 //debug(PRINTF) printf("+GC.scanStaticData()\n"); |
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899 os_query_staticdataseg(&pbot, &nbytes); |
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900 ptop = pbot + nbytes; |
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901 version (GNU) { |
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902 if (pbot) { |
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903 g.addRange(pbot, ptop); |
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904 } |
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905 } else { |
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906 g.addRange(pbot, ptop); |
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907 } |
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908 //debug(PRINTF) printf("-GC.scanStaticData()\n"); |
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909 } |
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910 |
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911 static void unscanStaticData(gc_t g) |
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912 { |
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|
913 void *pbot; |
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|
914 size_t nbytes; |
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131
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|
915 |
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|
916 os_query_staticdataseg(&pbot, &nbytes); |
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|
917 version (GNU) { |
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|
918 if (pbot) { |
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|
919 g.removeRange(pbot); |
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diff
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|
920 } |
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|
921 } else { |
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|
922 g.removeRange(pbot); |
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|
923 } |
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131
diff
changeset
|
924 } |
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131
diff
changeset
|
925 |
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131
diff
changeset
|
926 |
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|
927 /** |
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928 * add p to list of roots |
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|
929 */ |
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|
930 void addRoot(void *p) |
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|
931 { |
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|
932 if (!p) |
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|
933 { |
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|
934 return; |
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|
935 } |
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|
936 |
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|
937 if (!thread_needLock()) |
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|
938 { |
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|
939 gcx.addRoot(p); |
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|
940 } |
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|
941 else synchronized (gcLock) |
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|
942 { |
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|
943 gcx.addRoot(p); |
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|
944 } |
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|
945 } |
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|
946 |
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|
947 |
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|
948 /** |
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949 * remove p from list of roots |
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|
950 */ |
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951 void removeRoot(void *p) |
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|
952 { |
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|
953 if (!p) |
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|
954 { |
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|
955 return; |
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|
956 } |
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|
957 |
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958 if (!thread_needLock()) |
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|
959 { |
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960 gcx.removeRoot(p); |
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961 } |
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962 else synchronized (gcLock) |
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|
963 { |
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964 gcx.removeRoot(p); |
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|
965 } |
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|
966 } |
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|
967 |
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|
968 |
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969 /** |
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970 * add range to scan for roots |
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971 */ |
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972 void addRange(void *pbot, void *ptop) |
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|
973 { |
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|
974 if (!pbot || !ptop) |
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|
975 { |
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|
976 return; |
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|
977 } |
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|
978 |
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979 //debug(PRINTF) printf("+GC.addRange(pbot = x%x, ptop = x%x)\n", pbot, ptop); |
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980 if (!thread_needLock()) |
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diff
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|
981 { |
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|
982 gcx.addRange(pbot, ptop); |
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|
983 } |
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|
984 else synchronized (gcLock) |
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131
diff
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|
985 { |
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|
986 gcx.addRange(pbot, ptop); |
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|
987 } |
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988 //debug(PRINTF) printf("-GC.addRange()\n"); |
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|
989 } |
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131
diff
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|
990 |
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131
diff
changeset
|
991 |
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diff
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|
992 /** |
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|
993 * remove range |
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|
994 */ |
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|
995 void removeRange(void *p) |
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|
996 { |
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|
997 if (!p) |
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diff
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|
998 { |
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|
999 return; |
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diff
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|
1000 } |
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diff
changeset
|
1001 |
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|
1002 if (!thread_needLock()) |
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|
1003 { |
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|
1004 gcx.removeRange(p); |
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|
1005 } |
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|
1006 else synchronized (gcLock) |
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parents:
131
diff
changeset
|
1007 { |
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changeset
|
1008 gcx.removeRange(p); |
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|
1009 } |
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diff
changeset
|
1010 } |
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|
1011 |
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1012 |
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1013 /** |
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1014 * do full garbage collection |
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1015 */ |
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1016 void fullCollect() |
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1017 { |
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changeset
|
1018 debug(PRINTF) printf("GC.fullCollect()\n"); |
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|
1019 |
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1020 if (!thread_needLock()) |
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131
diff
changeset
|
1021 { |
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|
1022 gcx.fullcollectshell(); |
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|
1023 } |
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diff
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|
1024 else synchronized (gcLock) |
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diff
changeset
|
1025 { |
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changeset
|
1026 gcx.fullcollectshell(); |
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changeset
|
1027 } |
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diff
changeset
|
1028 |
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changeset
|
1029 version (none) |
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131
diff
changeset
|
1030 { |
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changeset
|
1031 GCStats stats; |
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changeset
|
1032 |
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131
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changeset
|
1033 getStats(stats); |
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changeset
|
1034 debug(PRINTF) printf("poolsize = %x, usedsize = %x, freelistsize = %x\n", |
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|
1035 stats.poolsize, stats.usedsize, stats.freelistsize); |
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131
diff
changeset
|
1036 } |
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parents:
131
diff
changeset
|
1037 |
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131
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changeset
|
1038 gcx.log_collect(); |
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1039 } |
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1040 |
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1041 |
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1042 /** |
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1043 * do full garbage collection ignoring roots |
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1044 */ |
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1045 void fullCollectNoStack() |
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1046 { |
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1047 if (!thread_needLock()) |
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1048 { |
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1049 gcx.noStack++; |
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1050 gcx.fullcollectshell(); |
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1051 gcx.noStack--; |
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1052 } |
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1053 else synchronized (gcLock) |
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1054 { |
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1055 gcx.noStack++; |
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1056 gcx.fullcollectshell(); |
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1057 gcx.noStack--; |
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1058 } |
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1059 } |
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1060 |
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1061 |
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1062 /** |
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1063 * do generational garbage collection |
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1064 */ |
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1065 void genCollect() |
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1066 { |
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1067 synchronized (gcLock) |
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1068 { |
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1069 gcx.fullcollectshell(); |
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1070 } |
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1071 } |
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1072 |
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1073 void minimize() // minimize physical memory usage |
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1074 { |
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1075 // Not implemented, ignore |
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1076 } |
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1077 |
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1078 void setFinalizer(void *p, GC_FINALIZER pFn) |
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1079 { |
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1080 synchronized (gcLock) |
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1081 { |
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1082 gcx.finalizer = pFn; |
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1083 gcx.doFinalize(p); |
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1084 } |
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1085 } |
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1086 |
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1087 |
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1088 void hasPointers(void *p) |
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1089 { |
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1090 synchronized (gcLock) |
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1091 { |
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1092 gcx.HasPointers(p); |
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1093 } |
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1094 } |
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1095 |
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1096 |
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1097 void hasNoPointers(void *p) |
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1098 { |
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1099 if (!gcx.conservative) |
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1100 { synchronized (gcLock) |
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1101 { |
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1102 gcx.HasNoPointers(p); |
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1103 } |
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1104 } |
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1105 } |
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1106 |
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1107 |
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1108 void setV1_0() |
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1109 { |
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1110 gcx.conservative = 1; |
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1111 } |
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1112 |
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1113 /** |
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1114 * Retrieve statistics about garbage collection. |
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1115 * Useful for debugging and tuning. |
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1116 */ |
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1117 void getStats(out GCStats stats) |
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1118 { |
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1119 if (!thread_needLock()) |
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1120 { |
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1121 getStatsNoSync(stats); |
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1122 } |
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1123 else synchronized (gcLock) |
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1124 { |
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1125 getStatsNoSync(stats); |
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1126 } |
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1127 } |
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1128 |
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1129 // |
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1130 // |
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1131 // |
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1132 private void getStatsNoSync(out GCStats stats) |
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1133 { |
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1134 size_t psize = 0; |
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1135 size_t usize = 0; |
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1136 size_t flsize = 0; |
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1137 |
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1138 size_t n; |
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1139 size_t bsize = 0; |
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1140 |
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1141 //debug(PRINTF) printf("getStats()\n"); |
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1142 cstring.memset(&stats, 0, GCStats.sizeof); |
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1143 |
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1144 for (n = 0; n < gcx.npools; n++) |
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1145 { Pool *pool = gcx.pooltable[n]; |
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1146 |
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1147 psize += pool.ncommitted * PAGESIZE; |
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1148 for (uint j = 0; j < pool.ncommitted; j++) |
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1149 { |
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1150 Bins bin = cast(Bins)pool.pagetable[j]; |
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1151 if (bin == B_FREE) |
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1152 stats.freeblocks++; |
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1153 else if (bin == B_PAGE) |
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1154 stats.pageblocks++; |
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1155 else if (bin < B_PAGE) |
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1156 bsize += PAGESIZE; |
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1157 } |
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1158 } |
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1159 |
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1160 for (n = 0; n < B_PAGE; n++) |
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1161 { |
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1162 //debug(PRINTF) printf("bin %d\n", n); |
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1163 for (List *list = gcx.bucket[n]; list; list = list.next) |
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1164 { |
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1165 //debug(PRINTF) printf("\tlist %x\n", list); |
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1166 flsize += binsize[n]; |
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1167 } |
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1168 } |
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1169 |
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1170 usize = bsize - flsize; |
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1171 |
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1172 stats.poolsize = psize; |
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1173 stats.usedsize = bsize - flsize; |
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1174 stats.freelistsize = flsize; |
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1175 } |
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1176 } |
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1177 |
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1178 |
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1179 /* ============================ Gcx =============================== */ |
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1180 |
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1181 enum |
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1182 { PAGESIZE = 4096, |
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1183 COMMITSIZE = (4096*16), |
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1184 POOLSIZE = (4096*256), |
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1185 } |
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1186 |
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1187 |
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1188 enum |
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1189 { |
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1190 B_16, |
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1191 B_32, |
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1192 B_64, |
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1193 B_128, |
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1194 B_256, |
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1195 B_512, |
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1196 B_1024, |
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1197 B_2048, |
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1198 B_PAGE, // start of large alloc |
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1199 B_PAGEPLUS, // continuation of large alloc |
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1200 B_FREE, // free page |
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1201 B_UNCOMMITTED, // memory not committed for this page |
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1202 B_MAX |
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1203 } |
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1204 |
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1205 |
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1206 alias ubyte Bins; |
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1207 |
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1208 |
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1209 struct List |
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1210 { |
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1211 List *next; |
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1212 } |
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1213 |
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1214 |
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1215 struct Range |
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1216 { |
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1217 void *pbot; |
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1218 void *ptop; |
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1219 } |
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1220 |
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1221 |
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1222 const uint binsize[B_MAX] = [ 16,32,64,128,256,512,1024,2048,4096 ]; |
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1223 const uint notbinsize[B_MAX] = [ ~(16u-1),~(32u-1),~(64u-1),~(128u-1),~(256u-1), |
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1224 ~(512u-1),~(1024u-1),~(2048u-1),~(4096u-1) ]; |
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1225 |
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1226 /* ============================ Gcx =============================== */ |
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1227 |
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1228 |
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1229 struct Gcx |
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1230 { |
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1231 debug (THREADINVARIANT) |
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1232 { |
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1233 pthread_t self; |
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1234 void thread_Invariant() |
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1235 { |
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1236 if (self != pthread_self()) |
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1237 printf("thread_Invariant(): gcx = %x, self = %x, pthread_self() = %x\n", this, self, pthread_self()); |
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1238 assert(self == pthread_self()); |
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1239 } |
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1240 } |
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1241 else |
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1242 { |
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1243 void thread_Invariant() { } |
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1244 } |
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1245 |
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1246 void *p_cache; |
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1247 size_t size_cache; |
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1248 |
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1249 size_t nroots; |
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1250 size_t rootdim; |
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1251 void **roots; |
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1252 |
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1253 size_t nranges; |
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1254 size_t rangedim; |
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1255 Range *ranges; |
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1256 |
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1257 uint conservative; // !=0 means conservative behavior |
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1258 uint noStack; // !=0 means don't scan stack |
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1259 uint log; // turn on logging |
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1260 uint anychanges; |
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1261 void *stackBottom; |
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1262 uint inited; |
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1263 int disabled; // turn off collections if >0 |
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1264 |
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1265 byte *minAddr; // min(baseAddr) |
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1266 byte *maxAddr; // max(topAddr) |
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1267 |
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1268 uint npools; |
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1269 Pool **pooltable; |
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1270 |
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1271 List *bucket[B_MAX]; // free list for each size |
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1272 |
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1273 GC_FINALIZER finalizer; // finalizer function (one per GC) |
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1274 |
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1275 private void rt_finalize( void* p, bool dummy ) |
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1276 { |
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1277 if (finalizer) |
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1278 (*finalizer)(p, dummy); |
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1279 } |
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1280 |
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1281 |
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1282 void initialize() |
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1283 { int dummy; |
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1284 |
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1285 (cast(byte *)this)[0 .. Gcx.sizeof] = 0; |
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1286 stackBottom = cast(char *)&dummy; |
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1287 log_init(); |
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1288 debug (THREADINVARIANT) |
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1289 self = pthread_self(); |
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1290 //printf("gcx = %p, self = %x\n", this, self); |
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1291 inited = 1; |
131 | 1292 } |
1293 | |
1294 | |
1295 void Dtor() | |
1296 { | |
473
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1297 inited = 0; |
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1298 |
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1299 for (uint i = 0; i < npools; i++) |
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1300 { Pool *pool = pooltable[i]; |
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1301 |
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1302 pool.Dtor(); |
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1303 cstdlib.free(pool); |
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1304 } |
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1305 if (pooltable) |
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1306 cstdlib.free(pooltable); |
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1307 |
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1308 if (roots) |
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1309 cstdlib.free(roots); |
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1310 |
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1311 if (ranges) |
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1312 cstdlib.free(ranges); |
131 | 1313 } |
1314 | |
473
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1315 |
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1316 void Invariant() { } |
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1317 |
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1318 |
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1319 invariant() |
131 | 1320 { |
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1321 if (inited) |
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1322 { |
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1323 //printf("Gcx.invariant(): this = %p\n", this); |
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1324 uint i; |
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1325 |
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1326 // Assure we're called on the right thread |
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1327 debug (THREADINVARIANT) assert(self == pthread_self()); |
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1328 |
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1329 for (i = 0; i < npools; i++) |
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1330 { Pool *pool = pooltable[i]; |
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1331 |
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1332 pool.Invariant(); |
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1333 if (i == 0) |
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1334 { |
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1335 assert(minAddr == pool.baseAddr); |
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1336 } |
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1337 if (i + 1 < npools) |
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1338 { |
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1339 assert(pool.opCmp(pooltable[i + 1]) < 0); |
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1340 } |
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1341 else if (i + 1 == npools) |
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1342 { |
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1343 assert(maxAddr == pool.topAddr); |
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1344 } |
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1345 } |
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1346 |
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1347 if (roots) |
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1348 { |
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1349 assert(rootdim != 0); |
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1350 assert(nroots <= rootdim); |
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1351 } |
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1352 |
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1353 if (ranges) |
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1354 { |
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1355 assert(rangedim != 0); |
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1356 assert(nranges <= rangedim); |
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1357 |
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1358 for (i = 0; i < nranges; i++) |
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1359 { |
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1360 assert(ranges[i].pbot); |
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1361 assert(ranges[i].ptop); |
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1362 assert(ranges[i].pbot <= ranges[i].ptop); |
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1363 } |
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1364 } |
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1365 |
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1366 for (i = 0; i < B_PAGE; i++) |
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1367 { |
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1368 for (List *list = bucket[i]; list; list = list.next) |
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1369 { |
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1370 } |
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1371 } |
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1372 } |
131 | 1373 } |
1374 | |
473
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1375 |
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1376 /** |
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1377 * |
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1378 */ |
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1379 |
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1380 void addRoot(void *p) |
131 | 1381 { |
473
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1382 if (nroots == rootdim) |
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1383 { |
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1384 size_t newdim = rootdim * 2 + 16; |
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1385 void** newroots; |
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1386 |
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1387 newroots = cast(void **)cstdlib.malloc(newdim * newroots[0].sizeof); |
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1388 if (!newroots) |
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1389 onOutOfMemoryError(); |
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1390 if (roots) |
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1391 { cstring.memcpy(newroots, roots, nroots * newroots[0].sizeof); |
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1392 cstdlib.free(roots); |
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1393 } |
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1394 roots = newroots; |
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1395 rootdim = newdim; |
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1396 } |
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1397 roots[nroots] = p; |
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1398 nroots++; |
131 | 1399 } |
1400 | |
1401 | |
473
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1402 /** |
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1403 * |
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1404 */ |
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1405 void removeRoot(void *p) |
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1406 { |
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1407 for (size_t i = nroots; i--;) |
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1408 { |
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1409 if (roots[i] == p) |
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1410 { |
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1411 nroots--; |
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1412 cstring.memmove(roots + i, roots + i + 1, (nroots - i) * roots[0].sizeof); |
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1413 return; |
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1414 } |
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1415 } |
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1416 assert(0); |
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1417 } |
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1418 |
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1419 |
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1420 /** |
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1421 * |
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1422 */ |
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1423 void addRange(void *pbot, void *ptop) |
131 | 1424 { |
473
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1425 debug(THREADINVARIANT) { debug(PRINTF) printf("Thread %x ", pthread_self()); } |
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1426 debug(PRINTF) printf("%x.Gcx::addRange(%x, %x), nranges = %d\n", this, pbot, ptop, nranges); |
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1427 if (nranges == rangedim) |
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diff
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1428 { |
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1429 size_t newdim = rangedim * 2 + 16; |
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1430 Range *newranges; |
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1431 |
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1432 newranges = cast(Range *)cstdlib.malloc(newdim * newranges[0].sizeof); |
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1433 if (!newranges) |
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|
1434 onOutOfMemoryError(); |
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1435 if (ranges) |
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1436 { cstring.memcpy(newranges, ranges, nranges * newranges[0].sizeof); |
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1437 cstdlib.free(ranges); |
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diff
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|
1438 } |
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1439 ranges = newranges; |
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1440 rangedim = newdim; |
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1441 } |
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1442 ranges[nranges].pbot = pbot; |
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1443 ranges[nranges].ptop = ptop; |
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1444 nranges++; |
131 | 1445 } |
1446 | |
1447 | |
473
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1448 /** |
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1449 * |
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1450 */ |
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1451 void removeRange(void *pbot) |
131 | 1452 { |
473
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|
1453 debug(THREADINVARIANT) { debug(PRINTF) printf("Thread %x ", pthread_self()); } |
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1454 debug(PRINTF) printf("%x.Gcx.removeRange(%x), nranges = %d\n", this, pbot, nranges); |
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1455 for (size_t i = nranges; i--;) |
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1456 { |
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1457 if (ranges[i].pbot == pbot) |
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1458 { |
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1459 nranges--; |
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1460 cstring.memmove(ranges + i, ranges + i + 1, (nranges - i) * ranges[0].sizeof); |
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1461 return; |
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1462 } |
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1463 } |
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1464 debug(PRINTF) printf("Wrong thread\n"); |
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1465 |
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1466 // This is a fatal error, but ignore it. |
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1467 // The problem is that we can get a Close() call on a thread |
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1468 // other than the one the range was allocated on. |
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1469 //assert(zero); |
131 | 1470 } |
1471 | |
1472 | |
473
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|
1473 /** |
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1474 * Find Pool that pointer is in. |
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1475 * Return null if not in a Pool. |
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1476 * Assume pooltable[] is sorted. |
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1477 */ |
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1478 Pool *findPool(void *p) |
131 | 1479 { |
473
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1480 if (p >= minAddr && p < maxAddr) |
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1481 { |
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1482 if (npools == 1) |
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diff
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|
1483 { |
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1484 return pooltable[0]; |
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diff
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|
1485 } |
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|
1486 |
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1487 for (uint i = 0; i < npools; i++) |
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1488 { Pool *pool; |
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1489 |
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1490 pool = pooltable[i]; |
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1491 if (p < pool.topAddr) |
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1492 { if (pool.baseAddr <= p) |
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diff
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1493 return pool; |
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|
1494 break; |
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|
1495 } |
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|
1496 } |
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|
1497 } |
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1498 return null; |
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|
1499 } |
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|
1500 |
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|
1501 |
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|
1502 /** |
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1503 * Find size of pointer p. |
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1504 * Returns 0 if not a gc'd pointer |
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1505 */ |
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1506 size_t findSize(void *p) |
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|
1507 { |
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1508 Pool *pool; |
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1509 size_t size = 0; |
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|
1510 |
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1511 pool = findPool(p); |
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1512 if (pool) |
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1513 { |
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1514 uint pagenum; |
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1515 Bins bin; |
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diff
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1516 |
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1517 pagenum = (cast(uint)(p - pool.baseAddr)) / PAGESIZE; |
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diff
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1518 bin = cast(Bins)pool.pagetable[pagenum]; |
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diff
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1519 size = binsize[bin]; |
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diff
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1520 if (bin == B_PAGE) |
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diff
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1521 { uint npages = pool.ncommitted; |
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diff
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1522 ubyte* pt; |
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1523 uint i; |
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1524 |
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1525 pt = &pool.pagetable[0]; |
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diff
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1526 for (i = pagenum + 1; i < npages; i++) |
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1527 { |
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1528 if (pt[i] != B_PAGEPLUS) |
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1529 break; |
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1530 } |
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1531 size = (i - pagenum) * PAGESIZE; |
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1532 } |
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1533 } |
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1534 return size; |
131 | 1535 } |
1536 | |
473
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1537 |
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1538 /** |
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1539 * Compute bin for size. |
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1540 */ |
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1541 static Bins findBin(size_t size) |
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1542 { Bins bin; |
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1543 |
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1544 if (size <= 256) |
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1545 { |
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1546 if (size <= 64) |
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1547 { |
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1548 if (size <= 16) |
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1549 bin = B_16; |
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1550 else if (size <= 32) |
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1551 bin = B_32; |
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1552 else |
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1553 bin = B_64; |
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131
diff
changeset
|
1554 } |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1555 else |
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Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1556 { |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1557 if (size <= 128) |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1558 bin = B_128; |
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Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1559 else |
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Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1560 bin = B_256; |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1561 } |
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131
diff
changeset
|
1562 } |
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131
diff
changeset
|
1563 else |
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131
diff
changeset
|
1564 { |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1565 if (size <= 1024) |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1566 { |
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parents:
131
diff
changeset
|
1567 if (size <= 512) |
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Applied downs' lphobos update
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131
diff
changeset
|
1568 bin = B_512; |
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Applied downs' lphobos update
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131
diff
changeset
|
1569 else |
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131
diff
changeset
|
1570 bin = B_1024; |
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Applied downs' lphobos update
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131
diff
changeset
|
1571 } |
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131
diff
changeset
|
1572 else |
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131
diff
changeset
|
1573 { |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1574 if (size <= 2048) |
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Applied downs' lphobos update
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131
diff
changeset
|
1575 bin = B_2048; |
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Applied downs' lphobos update
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131
diff
changeset
|
1576 else |
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Applied downs' lphobos update
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131
diff
changeset
|
1577 bin = B_PAGE; |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1578 } |
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131
diff
changeset
|
1579 } |
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Applied downs' lphobos update
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131
diff
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|
1580 return bin; |
131 | 1581 } |
1582 | |
473
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Applied downs' lphobos update
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131
diff
changeset
|
1583 |
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131
diff
changeset
|
1584 /** |
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131
diff
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|
1585 * Allocate a chunk of memory that is larger than a page. |
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parents:
131
diff
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|
1586 * Return null if out of memory. |
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131
diff
changeset
|
1587 */ |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1588 void *bigAlloc(size_t size) |
131 | 1589 { |
473
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1590 Pool *pool; |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1591 uint npages; |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1592 uint n; |
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131
diff
changeset
|
1593 uint pn; |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1594 uint freedpages; |
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Applied downs' lphobos update
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131
diff
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|
1595 void *p; |
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parents:
131
diff
changeset
|
1596 int state; |
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Applied downs' lphobos update
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131
diff
changeset
|
1597 |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1598 npages = (size + PAGESIZE - 1) / PAGESIZE; |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1599 |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1600 for (state = 0; ; ) |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1601 { |
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parents:
131
diff
changeset
|
1602 // This code could use some refinement when repeatedly |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1603 // allocating very large arrays. |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1604 |
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parents:
131
diff
changeset
|
1605 for (n = 0; n < npools; n++) |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1606 { |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1607 pool = pooltable[n]; |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1608 pn = pool.allocPages(npages); |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1609 if (pn != ~0u) |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1610 goto L1; |
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Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1611 } |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1612 |
373489eeaf90
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parents:
131
diff
changeset
|
1613 // Failed |
373489eeaf90
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parents:
131
diff
changeset
|
1614 switch (state) |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1615 { |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1616 case 0: |
373489eeaf90
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parents:
131
diff
changeset
|
1617 if (disabled) |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1618 { state = 1; |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1619 continue; |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1620 } |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1621 // Try collecting |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1622 freedpages = fullcollectshell(); |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1623 if (freedpages >= npools * ((POOLSIZE / PAGESIZE) / 4)) |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1624 { state = 1; |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1625 continue; |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1626 } |
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parents:
131
diff
changeset
|
1627 // Allocate new pool |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1628 pool = newPool(npages); |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1629 if (!pool) |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1630 { state = 2; |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1631 continue; |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1632 } |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1633 pn = pool.allocPages(npages); |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1634 assert(pn != ~0u); |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1635 goto L1; |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1636 |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1637 case 1: |
373489eeaf90
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parents:
131
diff
changeset
|
1638 // Allocate new pool |
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Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1639 pool = newPool(npages); |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1640 if (!pool) |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1641 goto Lnomemory; |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1642 pn = pool.allocPages(npages); |
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Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1643 assert(pn != ~0u); |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1644 goto L1; |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1645 |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1646 case 2: |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1647 goto Lnomemory; |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
1648 } |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1649 } |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1650 |
373489eeaf90
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parents:
131
diff
changeset
|
1651 L1: |
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parents:
131
diff
changeset
|
1652 pool.pagetable[pn] = B_PAGE; |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1653 if (npages > 1) |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1654 cstring.memset(&pool.pagetable[pn + 1], B_PAGEPLUS, npages - 1); |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1655 p = pool.baseAddr + pn * PAGESIZE; |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1656 cstring.memset(cast(char *)p + size, 0, npages * PAGESIZE - size); |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1657 debug (MEMSTOMP) cstring.memset(p, 0xF1, size); |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1658 //debug(PRINTF) printf("\tp = %x\n", p); |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1659 return p; |
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parents:
131
diff
changeset
|
1660 |
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131
diff
changeset
|
1661 Lnomemory: |
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parents:
131
diff
changeset
|
1662 onOutOfMemoryError(); |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1663 return null; |
131 | 1664 } |
1665 | |
1666 | |
473
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1667 /** |
373489eeaf90
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131
diff
changeset
|
1668 * Allocate a new pool with at least npages in it. |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1669 * Sort it into pooltable[]. |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1670 * Return null if failed. |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1671 */ |
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parents:
131
diff
changeset
|
1672 Pool *newPool(uint npages) |
131 | 1673 { |
473
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1674 Pool *pool; |
373489eeaf90
Applied downs' lphobos update
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131
diff
changeset
|
1675 Pool **newpooltable; |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1676 uint newnpools; |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
1677 uint i; |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
1678 |
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parents:
131
diff
changeset
|
1679 //debug(PRINTF) printf("************Gcx::newPool(npages = %d)****************\n", npages); |
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131
diff
changeset
|
1680 |
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parents:
131
diff
changeset
|
1681 // Round up to COMMITSIZE pages |
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Applied downs' lphobos update
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131
diff
changeset
|
1682 npages = (npages + (COMMITSIZE/PAGESIZE) - 1) & ~(COMMITSIZE/PAGESIZE - 1); |
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1683 |
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1684 // Minimum of POOLSIZE |
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1685 if (npages < POOLSIZE/PAGESIZE) |
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1686 npages = POOLSIZE/PAGESIZE; |
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1687 else if (npages > POOLSIZE/PAGESIZE) |
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1688 { // Give us 150% of requested size, so there's room to extend |
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1689 auto n = npages + (npages >> 1); |
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1690 if (n < size_t.max/PAGESIZE) |
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1691 npages = n; |
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1692 } |
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1693 |
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1694 // Allocate successively larger pools up to 8 megs |
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1695 if (npools) |
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1696 { uint n; |
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1697 |
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1698 n = npools; |
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1699 if (n > 8) |
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1700 n = 8; // cap pool size at 8 megs |
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1701 n *= (POOLSIZE / PAGESIZE); |
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1702 if (npages < n) |
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1703 npages = n; |
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1704 } |
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1705 |
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1706 pool = cast(Pool *)cstdlib.calloc(1, Pool.sizeof); |
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1707 if (pool) |
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1708 { |
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1709 pool.initialize(npages); |
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1710 if (!pool.baseAddr) |
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1711 goto Lerr; |
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1712 |
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1713 newnpools = npools + 1; |
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1714 newpooltable = cast(Pool **)cstdlib.realloc(pooltable, newnpools * (Pool *).sizeof); |
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1715 if (!newpooltable) |
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1716 goto Lerr; |
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1717 |
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1718 // Sort pool into newpooltable[] |
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1719 for (i = 0; i < npools; i++) |
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1720 { |
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1721 if (pool.opCmp(newpooltable[i]) < 0) |
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1722 break; |
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1723 } |
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1724 cstring.memmove(newpooltable + i + 1, newpooltable + i, (npools - i) * (Pool *).sizeof); |
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1725 newpooltable[i] = pool; |
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1726 |
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1727 pooltable = newpooltable; |
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1728 npools = newnpools; |
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1729 |
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1730 minAddr = pooltable[0].baseAddr; |
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1731 maxAddr = pooltable[npools - 1].topAddr; |
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1732 } |
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1733 return pool; |
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|
1734 |
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1735 Lerr: |
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1736 pool.Dtor(); |
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1737 cstdlib.free(pool); |
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1738 return null; |
131 | 1739 } |
1740 | |
473
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1741 |
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|
1742 /** |
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1743 * Allocate a page of bin's. |
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1744 * Returns: |
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1745 * 0 failed |
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1746 */ |
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1747 int allocPage(Bins bin) |
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1748 { |
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1749 Pool *pool; |
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1750 uint n; |
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|
1751 uint pn; |
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1752 byte *p; |
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1753 byte *ptop; |
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1754 |
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1755 //debug(PRINTF) printf("Gcx::allocPage(bin = %d)\n", bin); |
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1756 for (n = 0; n < npools; n++) |
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|
1757 { |
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1758 pool = pooltable[n]; |
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1759 pn = pool.allocPages(1); |
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1760 if (pn != ~0u) |
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|
1761 goto L1; |
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diff
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|
1762 } |
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1763 return 0; // failed |
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|
1764 |
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|
1765 L1: |
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|
1766 pool.pagetable[pn] = cast(ubyte)bin; |
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1767 |
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1768 // Convert page to free list |
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1769 size_t size = binsize[bin]; |
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1770 List **b = &bucket[bin]; |
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|
1771 |
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1772 p = pool.baseAddr + pn * PAGESIZE; |
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1773 ptop = p + PAGESIZE; |
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1774 for (; p < ptop; p += size) |
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diff
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|
1775 { |
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1776 (cast(List *)p).next = *b; |
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1777 *b = cast(List *)p; |
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|
1778 } |
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1779 return 1; |
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|
1780 } |
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|
1781 |
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|
1782 |
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|
1783 /** |
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1784 * Search a range of memory values and mark any pointers into the GC pool. |
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|
1785 */ |
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|
1786 void mark(void *pbot, void *ptop) |
131 | 1787 { |
473
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1788 void **p1 = cast(void **)pbot; |
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1789 void **p2 = cast(void **)ptop; |
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1790 uint changes = 0; |
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|
1791 |
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1792 //printf("marking range: %p -> %p\n", pbot, ptop); |
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1793 for (; p1 < p2; p1++) |
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|
1794 { |
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1795 Pool *pool; |
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1796 byte *p = cast(byte *)(*p1); |
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1797 |
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1798 //if (log) debug(PRINTF) printf("\tmark %x\n", p); |
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1799 if (p >= minAddr) |
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|
1800 { |
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1801 pool = findPool(p); |
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1802 if (pool) |
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1803 { |
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1804 size_t offset = cast(size_t)(p - pool.baseAddr); |
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1805 uint biti; |
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1806 uint pn = offset / PAGESIZE; |
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1807 Bins bin = cast(Bins)pool.pagetable[pn]; |
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1808 |
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1809 //debug(PRINTF) printf("\t\tfound pool %x, base=%x, pn = %d, bin = %d, biti = x%x\n", pool, pool.baseAddr, pn, bin, biti); |
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1810 |
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1811 // Adjust bit to be at start of allocated memory block |
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1812 if (bin <= B_PAGE) |
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1813 { |
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1814 biti = (offset & notbinsize[bin]) >> 4; |
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1815 //debug(PRINTF) printf("\t\tbiti = x%x\n", biti); |
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1816 } |
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1817 else if (bin == B_PAGEPLUS) |
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1818 { |
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1819 do |
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1820 { --pn; |
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1821 } while (cast(Bins)pool.pagetable[pn] == B_PAGEPLUS); |
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1822 biti = pn * (PAGESIZE / 16); |
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1823 } |
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1824 else |
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1825 { |
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1826 // Don't mark bits in B_FREE or B_UNCOMMITTED pages |
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1827 continue; |
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1828 } |
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1829 |
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1830 //debug(PRINTF) printf("\t\tmark(x%x) = %d\n", biti, pool.mark.test(biti)); |
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1831 if (!pool.mark.test(biti)) |
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1832 { |
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1833 //if (log) debug(PRINTF) printf("\t\tmarking %x\n", p); |
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1834 pool.mark.set(biti); |
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1835 if (!pool.noscan.test(biti)) |
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1836 { |
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1837 pool.scan.set(biti); |
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1838 changes = 1; |
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1839 } |
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1840 log_parent(sentinel_add(pool.baseAddr + biti * 16), sentinel_add(pbot)); |
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1841 } |
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1842 } |
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1843 } |
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1844 } |
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1845 anychanges |= changes; |
131 | 1846 } |
1847 | |
1848 | |
473
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1849 /** |
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1850 * Return number of full pages free'd. |
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1851 */ |
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1852 size_t fullcollectshell() |
131 | 1853 { |
473
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1854 // The purpose of the 'shell' is to ensure all the registers |
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1855 // get put on the stack so they'll be scanned |
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1856 void *sp; |
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1857 size_t result; |
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1858 version (GNU) |
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1859 { |
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1860 __builtin_unwind_init(); |
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1861 sp = & sp; |
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1862 } |
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1863 else |
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1864 { |
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1865 /*asm |
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1866 { |
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1867 pushad ; |
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1868 mov sp[EBP],ESP ; |
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1869 }*/ |
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1870 } |
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1871 result = fullcollect(sp); |
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1872 version (GNU) |
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1873 { |
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1874 // nothing to do |
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1875 } |
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1876 else |
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1877 { |
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1878 /*asm |
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1879 { |
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1880 popad ; |
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1881 }*/ |
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1882 } |
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1883 return result; |
131 | 1884 } |
1885 | |
473
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1886 |
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1887 /** |
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1888 * |
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1889 */ |
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1890 size_t fullcollect(void *stackTop) |
131 | 1891 { |
473
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1892 uint n; |
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1893 Pool *pool; |
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1894 |
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1895 debug(COLLECT_PRINTF) printf("Gcx.fullcollect()\n"); |
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1896 |
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1897 Thread.pauseAll(); |
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1898 |
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1899 p_cache = null; |
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1900 size_cache = 0; |
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1901 |
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1902 anychanges = 0; |
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1903 for (n = 0; n < npools; n++) |
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1904 { |
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1905 pool = pooltable[n]; |
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1906 pool.mark.zero(); |
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1907 pool.scan.zero(); |
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1908 pool.freebits.zero(); |
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1909 } |
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1910 |
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1911 // Mark each free entry, so it doesn't get scanned |
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1912 for (n = 0; n < B_PAGE; n++) |
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1913 { |
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1914 for (List *list = bucket[n]; list; list = list.next) |
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1915 { |
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1916 pool = findPool(list); |
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1917 assert(pool); |
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1918 pool.freebits.set(cast(uint)(cast(byte *)list - pool.baseAddr) / 16); |
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1919 } |
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1920 } |
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1921 |
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1922 for (n = 0; n < npools; n++) |
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1923 { |
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1924 pool = pooltable[n]; |
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1925 pool.mark.copy(&pool.freebits); |
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1926 } |
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1927 |
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1928 version (MULTI_THREADED) |
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1929 { |
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1930 // Scan stacks and registers for each paused thread |
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1931 Thread[] threads = Thread.getAll(); |
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1932 //thread_id id = cast(thread_id) GetCurrentThread(); |
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1933 for (n = 0; n < threads.length; n++) |
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1934 { Thread t = threads[n]; |
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1935 |
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1936 if (t && t.getState() == Thread.TS.RUNNING) |
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1937 { |
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1938 if (noStack && threads.length == 1) |
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1939 break; |
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1940 |
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1941 version (Win32) |
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1942 { |
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1943 CONTEXT context; |
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1944 |
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1945 context.ContextFlags = CONTEXT_INTEGER | CONTEXT_CONTROL; |
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1946 if (!GetThreadContext(t.hdl, &context)) |
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1947 { |
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1948 assert(0); |
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1949 } |
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1950 debug (PRINTF) printf("mt scan stack bot = %x, top = %x\n", context.Esp, t.stackBottom); |
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1951 mark(cast(void *)context.Esp, t.stackBottom); |
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1952 mark(&context.Edi, &context.Eip); |
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1953 } |
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1954 else version (GNU) |
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1955 { |
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1956 if (t.isSelf()) |
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1957 t.stackTop = Thread.getESP(); |
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1958 |
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1959 //%%fry printf("top=%08x bot=%08x ext=%08x\n", t.stackTop, t.stackBottom, Thread.getESP());//%%try |
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1960 version (STACKGROWSDOWN) |
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1961 mark(t.stackTop, t.stackBottom); |
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1962 else |
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1963 mark(t.stackBottom, t.stackTop); |
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1964 } |
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1965 else version (linux) |
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1966 { |
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1967 // The registers are already stored in the stack |
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1968 //printf("Thread: ESP = x%x, stackBottom = x%x, isSelf = %d\n", Thread.getESP(), t.stackBottom, t.isSelf()); |
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1969 if (t.isSelf()) |
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1970 t.stackTop = Thread.getESP(); |
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|
1971 |
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|
1972 version (STACKGROWSDOWN) |
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1973 mark(t.stackTop, t.stackBottom); |
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1974 else |
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1975 mark(t.stackBottom, t.stackTop); |
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|
1976 } |
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|
1977 } |
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|
1978 } |
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|
1979 } |
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|
1980 else |
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|
1981 { |
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|
1982 if (!noStack) |
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|
1983 { |
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1984 // Scan stack for main thread |
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1985 debug(PRINTF) printf(" scan stack bot = %x, top = %x\n", stackTop, stackBottom); |
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|
1986 version (STACKGROWSDOWN) |
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|
1987 mark(stackTop, stackBottom); |
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|
1988 else |
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diff
changeset
|
1989 mark(stackBottom, stackTop); |
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changeset
|
1990 } |
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changeset
|
1991 } |
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changeset
|
1992 |
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diff
changeset
|
1993 // Scan roots[] |
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changeset
|
1994 debug(COLLECT_PRINTF) printf("scan roots[]\n"); |
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|
1995 mark(roots, roots + nroots); |
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diff
changeset
|
1996 |
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diff
changeset
|
1997 // Scan ranges[] |
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|
1998 debug(COLLECT_PRINTF) printf("scan ranges[]\n"); |
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|
1999 //log++; |
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|
2000 for (n = 0; n < nranges; n++) |
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131
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|
2001 { |
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diff
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|
2002 debug(COLLECT_PRINTF) printf("\t%x .. %x\n", ranges[n].pbot, ranges[n].ptop); |
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|
2003 mark(ranges[n].pbot, ranges[n].ptop); |
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131
diff
changeset
|
2004 } |
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diff
changeset
|
2005 //log--; |
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diff
changeset
|
2006 |
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changeset
|
2007 debug(COLLECT_PRINTF) printf("\tscan heap\n"); |
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changeset
|
2008 while (anychanges) |
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diff
changeset
|
2009 { |
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diff
changeset
|
2010 anychanges = 0; |
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|
2011 for (n = 0; n < npools; n++) |
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131
diff
changeset
|
2012 { |
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diff
changeset
|
2013 uint *bbase; |
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diff
changeset
|
2014 uint *b; |
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diff
changeset
|
2015 uint *btop; |
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diff
changeset
|
2016 |
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diff
changeset
|
2017 pool = pooltable[n]; |
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diff
changeset
|
2018 |
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diff
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|
2019 bbase = pool.scan.base(); |
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diff
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|
2020 btop = bbase + pool.scan.nwords; |
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|
2021 for (b = bbase; b < btop;) |
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|
2022 { Bins bin; |
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|
2023 uint pn; |
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|
2024 uint u; |
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|
2025 uint bitm; |
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|
2026 byte *o; |
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|
2027 |
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|
2028 bitm = *b; |
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changeset
|
2029 if (!bitm) |
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|
2030 { b++; |
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|
2031 continue; |
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|
2032 } |
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|
2033 *b = 0; |
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|
2034 |
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|
2035 o = pool.baseAddr + (b - bbase) * 32 * 16; |
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|
2036 /* version (BigEndian) |
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|
2037 bitm = bswap(bitm); |
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|
2038 */ |
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|
2039 if (!(bitm & 0xFFFF)) |
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diff
changeset
|
2040 { |
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|
2041 bitm >>= 16; |
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|
2042 o += 16 * 16; |
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|
2043 } |
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|
2044 for (; bitm; o += 16, bitm >>= 1) |
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|
2045 { |
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changeset
|
2046 if (!(bitm & 1)) |
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|
2047 continue; |
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|
2048 |
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|
2049 pn = (o - pool.baseAddr) / PAGESIZE; |
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|
2050 bin = cast(Bins)pool.pagetable[pn]; |
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2051 if (bin < B_PAGE) |
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|
2052 { |
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|
2053 mark(o, o + binsize[bin]); |
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|
2054 } |
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changeset
|
2055 else if (bin == B_PAGE || bin == B_PAGEPLUS) |
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diff
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|
2056 { |
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Applied downs' lphobos update
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131
diff
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|
2057 if (bin == B_PAGEPLUS) |
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Applied downs' lphobos update
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diff
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|
2058 { |
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131
diff
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|
2059 while (pool.pagetable[pn - 1] != B_PAGE) |
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131
diff
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|
2060 pn--; |
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131
diff
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|
2061 } |
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131
diff
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|
2062 u = 1; |
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diff
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|
2063 while (pn + u < pool.ncommitted && pool.pagetable[pn + u] == B_PAGEPLUS) |
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|
2064 u++; |
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131
diff
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|
2065 mark(o, o + u * PAGESIZE); |
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131
diff
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|
2066 } |
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131
diff
changeset
|
2067 } |
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131
diff
changeset
|
2068 } |
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131
diff
changeset
|
2069 } |
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131
diff
changeset
|
2070 } |
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131
diff
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|
2071 |
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131
diff
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|
2072 // Free up everything not marked |
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diff
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|
2073 debug(COLLECT_PRINTF) printf("\tfree'ing\n"); |
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131
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|
2074 size_t freedpages = 0; |
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|
2075 size_t freed = 0; |
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diff
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|
2076 for (n = 0; n < npools; n++) |
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|
2077 { uint pn; |
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|
2078 uint ncommitted; |
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|
2079 uint *bbase; |
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|
2080 |
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2081 pool = pooltable[n]; |
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|
2082 bbase = pool.mark.base(); |
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2083 ncommitted = pool.ncommitted; |
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2084 for (pn = 0; pn < ncommitted; pn++, bbase += PAGESIZE / (32 * 16)) |
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|
2085 { |
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|
2086 Bins bin = cast(Bins)pool.pagetable[pn]; |
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131
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|
2087 |
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131
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|
2088 if (bin < B_PAGE) |
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|
2089 { byte *p; |
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|
2090 byte *ptop; |
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|
2091 uint biti; |
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2092 uint bitstride; |
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|
2093 uint size = binsize[bin]; |
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|
2094 |
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|
2095 p = pool.baseAddr + pn * PAGESIZE; |
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|
2096 ptop = p + PAGESIZE; |
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|
2097 biti = pn * (PAGESIZE/16); |
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131
diff
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|
2098 bitstride = size / 16; |
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131
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|
2099 |
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|
2100 version(none) // BUG: doesn't work because freebits() must also be cleared |
131 | 2101 { |
473
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131
diff
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|
2102 // If free'd entire page |
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diff
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|
2103 if (bbase[0] == 0 && bbase[1] == 0 && bbase[2] == 0 && bbase[3] == 0 && |
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diff
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|
2104 bbase[4] == 0 && bbase[5] == 0 && bbase[6] == 0 && bbase[7] == 0) |
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131
diff
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|
2105 { |
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diff
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|
2106 for (; p < ptop; p += size, biti += bitstride) |
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131
diff
changeset
|
2107 { |
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131
diff
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|
2108 if (pool.finals.nbits && pool.finals.testClear(biti)) |
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131
diff
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|
2109 rt_finalize(cast(List *)sentinel_add(p), false); |
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131
diff
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|
2110 |
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131
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|
2111 List *list = cast(List *)p; |
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131
diff
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|
2112 //debug(PRINTF) printf("\tcollecting %x\n", list); |
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131
diff
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|
2113 log_free(sentinel_add(list)); |
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131
diff
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|
2114 |
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131
diff
changeset
|
2115 debug (MEMSTOMP) cstring.memset(p, 0xF3, size); |
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131
diff
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|
2116 } |
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131
diff
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|
2117 pool.pagetable[pn] = B_FREE; |
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131
diff
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|
2118 freed += PAGESIZE; |
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131
diff
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|
2119 //debug(PRINTF) printf("freeing entire page %d\n", pn); |
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131
diff
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|
2120 continue; |
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131
diff
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|
2121 } |
131 | 2122 } |
473
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2123 for (; p < ptop; p += size, biti += bitstride) |
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131
diff
changeset
|
2124 { |
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131
diff
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|
2125 if (!pool.mark.test(biti)) |
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131
diff
changeset
|
2126 { |
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Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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131
diff
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|
2127 sentinel_Invariant(sentinel_add(p)); |
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131
diff
changeset
|
2128 |
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Applied downs' lphobos update
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131
diff
changeset
|
2129 pool.freebits.set(biti); |
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Applied downs' lphobos update
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131
diff
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|
2130 pool.noscan.clear(biti); |
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131
diff
changeset
|
2131 if (pool.finals.nbits && pool.finals.testClear(biti)) |
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131
diff
changeset
|
2132 rt_finalize(cast(List *)sentinel_add(p), false); |
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131
diff
changeset
|
2133 |
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131
diff
changeset
|
2134 List *list = cast(List *)p; |
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131
diff
changeset
|
2135 debug(PRINTF) printf("\tcollecting %x\n", list); |
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131
diff
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|
2136 log_free(sentinel_add(list)); |
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131
diff
changeset
|
2137 |
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Applied downs' lphobos update
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131
diff
changeset
|
2138 debug (MEMSTOMP) cstring.memset(p, 0xF3, size); |
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131
diff
changeset
|
2139 |
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131
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changeset
|
2140 freed += size; |
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131
diff
changeset
|
2141 } |
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131
diff
changeset
|
2142 } |
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131
diff
changeset
|
2143 } |
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131
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|
2144 else if (bin == B_PAGE) |
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diff
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|
2145 { uint biti = pn * (PAGESIZE / 16); |
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131
diff
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|
2146 |
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|
2147 if (!pool.mark.test(biti)) |
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diff
changeset
|
2148 { byte *p = pool.baseAddr + pn * PAGESIZE; |
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131
diff
changeset
|
2149 |
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131
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changeset
|
2150 sentinel_Invariant(sentinel_add(p)); |
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|
2151 pool.noscan.clear(biti); |
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changeset
|
2152 if (pool.finals.nbits && pool.finals.testClear(biti)) |
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diff
changeset
|
2153 rt_finalize(sentinel_add(p), false); |
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131
diff
changeset
|
2154 |
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changeset
|
2155 debug(COLLECT_PRINTF) printf("\tcollecting big %x\n", p); |
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diff
changeset
|
2156 log_free(sentinel_add(p)); |
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diff
changeset
|
2157 pool.pagetable[pn] = B_FREE; |
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131
diff
changeset
|
2158 freedpages++; |
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changeset
|
2159 debug (MEMSTOMP) cstring.memset(p, 0xF3, PAGESIZE); |
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diff
changeset
|
2160 while (pn + 1 < ncommitted && pool.pagetable[pn + 1] == B_PAGEPLUS) |
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131
diff
changeset
|
2161 { |
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131
diff
changeset
|
2162 pn++; |
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131
diff
changeset
|
2163 pool.pagetable[pn] = B_FREE; |
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diff
changeset
|
2164 freedpages++; |
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131
diff
changeset
|
2165 |
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changeset
|
2166 debug (MEMSTOMP) |
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diff
changeset
|
2167 { p += PAGESIZE; |
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diff
changeset
|
2168 cstring.memset(p, 0xF3, PAGESIZE); |
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131
diff
changeset
|
2169 } |
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131
diff
changeset
|
2170 } |
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131
diff
changeset
|
2171 } |
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131
diff
changeset
|
2172 } |
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diff
changeset
|
2173 } |
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diff
changeset
|
2174 } |
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2175 |
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2176 // Zero buckets |
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2177 bucket[] = null; |
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2178 |
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2179 // Free complete pages, rebuild free list |
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2180 debug(COLLECT_PRINTF) printf("\tfree complete pages\n"); |
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2181 size_t recoveredpages = 0; |
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2182 for (n = 0; n < npools; n++) |
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2183 { uint pn; |
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2184 uint ncommitted; |
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2185 |
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2186 pool = pooltable[n]; |
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2187 ncommitted = pool.ncommitted; |
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2188 for (pn = 0; pn < ncommitted; pn++) |
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2189 { |
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2190 Bins bin = cast(Bins)pool.pagetable[pn]; |
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2191 uint biti; |
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2192 uint u; |
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2193 |
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2194 if (bin < B_PAGE) |
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2195 { |
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2196 uint size = binsize[bin]; |
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2197 uint bitstride = size / 16; |
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2198 uint bitbase = pn * (PAGESIZE / 16); |
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2199 uint bittop = bitbase + (PAGESIZE / 16); |
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2200 byte *p; |
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2201 |
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2202 biti = bitbase; |
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2203 for (biti = bitbase; biti < bittop; biti += bitstride) |
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2204 { if (!pool.freebits.test(biti)) |
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2205 goto Lnotfree; |
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2206 } |
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2207 pool.pagetable[pn] = B_FREE; |
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2208 recoveredpages++; |
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2209 continue; |
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2210 |
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2211 Lnotfree: |
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2212 p = pool.baseAddr + pn * PAGESIZE; |
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2213 for (u = 0; u < PAGESIZE; u += size) |
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2214 { biti = bitbase + u / 16; |
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2215 if (pool.freebits.test(biti)) |
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2216 { List *list; |
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2217 |
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2218 list = cast(List *)(p + u); |
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2219 if (list.next != bucket[bin]) // avoid unnecessary writes |
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2220 list.next = bucket[bin]; |
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2221 bucket[bin] = list; |
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2222 } |
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2223 } |
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2224 } |
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2225 } |
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2226 } |
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2227 |
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2228 debug(COLLECT_PRINTF) printf("recovered pages = %d\n", recoveredpages); |
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2229 debug(COLLECT_PRINTF) printf("\tfree'd %u bytes, %u pages from %u pools\n", freed, freedpages, npools); |
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2230 |
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2231 Thread.resumeAll(); |
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2232 |
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2233 return freedpages + recoveredpages; |
131 | 2234 } |
2235 | |
473
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2236 |
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2237 /** |
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2238 * Run finalizer on p when it is free'd. |
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2239 */ |
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2240 void doFinalize(void *p) |
131 | 2241 { |
473
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2242 Pool *pool = findPool(p); |
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2243 assert(pool); |
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2244 |
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2245 // Only allocate finals[] if we actually need it |
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2246 if (!pool.finals.nbits) |
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2247 pool.finals.alloc(pool.mark.nbits); |
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2248 |
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2249 pool.finals.set((p - pool.baseAddr) / 16); |
131 | 2250 } |
2251 | |
473
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2252 |
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2253 /** |
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2254 * Indicate that block pointed to by p has possible pointers |
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2255 * to GC allocated memory in it. |
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2256 */ |
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|
2257 |
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2258 void HasPointers(void *p) |
131 | 2259 { |
473
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2260 Pool *pool = findPool(p); |
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2261 assert(pool); |
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2262 |
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2263 pool.noscan.clear((p - pool.baseAddr) / 16); |
131 | 2264 } |
2265 | |
473
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2266 |
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2267 /** |
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2268 * Indicate that block pointed to by p has no possible pointers |
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2269 * to GC allocated memory in it. |
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|
2270 */ |
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2271 void HasNoPointers(void *p) |
131 | 2272 { |
473
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2273 //printf("HasNoPointers(%p)\n", p); |
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2274 Pool *pool = findPool(p); |
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2275 assert(pool); |
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2276 |
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2277 pool.noscan.set((p - pool.baseAddr) / 16); |
131 | 2278 } |
2279 | |
473
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2280 |
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2281 /***** Leak Detector ******/ |
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2282 |
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2283 |
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2284 debug (LOGGING) |
131 | 2285 { |
473
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2286 LogArray current; |
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2287 LogArray prev; |
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2288 |
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2289 |
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2290 void log_init() |
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2291 { |
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2292 //debug(PRINTF) printf("+log_init()\n"); |
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2293 current.reserve(1000); |
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2294 prev.reserve(1000); |
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2295 //debug(PRINTF) printf("-log_init()\n"); |
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2296 } |
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|
2297 |
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2298 |
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2299 void log_malloc(void *p, size_t size) |
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2300 { |
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2301 //debug(PRINTF) printf("+log_malloc(p = %x, size = %d)\n", p, size); |
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2302 Log log; |
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2303 |
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2304 log.p = p; |
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2305 log.size = size; |
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|
2306 log.line = GC.line; |
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|
2307 log.file = GC.file; |
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|
2308 log.parent = null; |
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|
2309 |
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|
2310 GC.line = 0; |
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2311 GC.file = null; |
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2312 |
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2313 current.push(log); |
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diff
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|
2314 //debug(PRINTF) printf("-log_malloc()\n"); |
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131
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|
2315 } |
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diff
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|
2316 |
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diff
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|
2317 |
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|
2318 void log_free(void *p) |
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131
diff
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|
2319 { |
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|
2320 //debug(PRINTF) printf("+log_free(%x)\n", p); |
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|
2321 size_t i; |
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|
2322 |
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|
2323 i = current.find(p); |
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|
2324 if (i == ~0u) |
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131
diff
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|
2325 { |
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131
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|
2326 debug(PRINTF) printf("free'ing unallocated memory %x\n", p); |
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|
2327 } |
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131
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|
2328 else |
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131
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|
2329 current.remove(i); |
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|
2330 //debug(PRINTF) printf("-log_free()\n"); |
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131
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|
2331 } |
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131
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|
2332 |
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|
2333 void log_collect() |
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131
diff
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|
2334 { |
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131
diff
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|
2335 //debug(PRINTF) printf("+log_collect()\n"); |
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|
2336 // Print everything in current that is not in prev |
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|
2337 |
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|
2338 debug(PRINTF) printf("New pointers this cycle: --------------------------------\n"); |
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131
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2339 size_t used = 0; |
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|
2340 for (size_t i = 0; i < current.dim; i++) |
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|
2341 { |
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131
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|
2342 size_t j; |
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|
2343 |
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2344 j = prev.find(current.data[i].p); |
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2345 if (j == ~0u) |
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|
2346 current.data[i].print(); |
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|
2347 else |
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2348 used++; |
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|
2349 } |
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131
diff
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|
2350 |
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|
2351 debug(PRINTF) printf("All roots this cycle: --------------------------------\n"); |
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|
2352 for (size_t i = 0; i < current.dim; i++) |
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131
diff
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|
2353 { |
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131
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|
2354 void *p; |
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|
2355 size_t j; |
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131
diff
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|
2356 |
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131
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|
2357 p = current.data[i].p; |
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131
diff
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|
2358 if (!findPool(current.data[i].parent)) |
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131
diff
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|
2359 { |
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131
diff
changeset
|
2360 j = prev.find(current.data[i].p); |
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131
diff
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|
2361 if (j == ~0u) |
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131
diff
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|
2362 debug(PRINTF) printf("N"); |
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131
diff
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|
2363 else |
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131
diff
changeset
|
2364 debug(PRINTF) printf(" ");; |
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131
diff
changeset
|
2365 current.data[i].print(); |
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131
diff
changeset
|
2366 } |
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131
diff
changeset
|
2367 } |
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parents:
131
diff
changeset
|
2368 |
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131
diff
changeset
|
2369 debug(PRINTF) printf("Used = %d-------------------------------------------------\n", used); |
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131
diff
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|
2370 prev.copy(¤t); |
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131
diff
changeset
|
2371 |
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parents:
131
diff
changeset
|
2372 debug(PRINTF) printf("-log_collect()\n"); |
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131
diff
changeset
|
2373 } |
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parents:
131
diff
changeset
|
2374 |
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parents:
131
diff
changeset
|
2375 |
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131
diff
changeset
|
2376 void log_parent(void *p, void *parent) |
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131
diff
changeset
|
2377 { |
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131
diff
changeset
|
2378 //debug(PRINTF) printf("+log_parent()\n"); |
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131
diff
changeset
|
2379 size_t i; |
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131
diff
changeset
|
2380 |
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parents:
131
diff
changeset
|
2381 i = current.find(p); |
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131
diff
changeset
|
2382 if (i == ~0u) |
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131
diff
changeset
|
2383 { |
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parents:
131
diff
changeset
|
2384 debug(PRINTF) printf("parent'ing unallocated memory %x, parent = %x\n", p, parent); |
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131
diff
changeset
|
2385 Pool *pool; |
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131
diff
changeset
|
2386 pool = findPool(p); |
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131
diff
changeset
|
2387 assert(pool); |
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131
diff
changeset
|
2388 size_t offset = cast(uint)(p - pool.baseAddr); |
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parents:
131
diff
changeset
|
2389 size_t biti; |
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Applied downs' lphobos update
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131
diff
changeset
|
2390 uint pn = offset / PAGESIZE; |
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Applied downs' lphobos update
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131
diff
changeset
|
2391 Bins bin = cast(Bins)pool.pagetable[pn]; |
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Applied downs' lphobos update
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131
diff
changeset
|
2392 biti = (offset & notbinsize[bin]); |
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parents:
131
diff
changeset
|
2393 debug(PRINTF) printf("\tbin = %d, offset = x%x, biti = x%x\n", bin, offset, biti); |
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131
diff
changeset
|
2394 } |
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131
diff
changeset
|
2395 else |
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parents:
131
diff
changeset
|
2396 { |
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131
diff
changeset
|
2397 current.data[i].parent = parent; |
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131
diff
changeset
|
2398 } |
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131
diff
changeset
|
2399 //debug(PRINTF) printf("-log_parent()\n"); |
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131
diff
changeset
|
2400 } |
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131
diff
changeset
|
2401 |
131 | 2402 } |
473
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131
diff
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|
2403 else |
131 | 2404 { |
473
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131
diff
changeset
|
2405 void log_init() { } |
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diff
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|
2406 void log_malloc(void *p, size_t size) { } |
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diff
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|
2407 void log_free(void *p) { } |
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131
diff
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|
2408 void log_collect() { } |
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diff
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|
2409 void log_parent(void *p, void *parent) { } |
131 | 2410 } |
2411 } | |
473
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131
diff
changeset
|
2412 |
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131
diff
changeset
|
2413 |
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|
2414 /* ============================ Pool =============================== */ |
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diff
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|
2415 |
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diff
changeset
|
2416 |
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diff
changeset
|
2417 struct Pool |
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diff
changeset
|
2418 { |
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|
2419 byte* baseAddr; |
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diff
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|
2420 byte* topAddr; |
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diff
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|
2421 GCBits mark; // entries already scanned, or should not be scanned |
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131
diff
changeset
|
2422 GCBits scan; // entries that need to be scanned |
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131
diff
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|
2423 GCBits freebits; // entries that are on the free list |
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131
diff
changeset
|
2424 GCBits finals; // entries that need finalizer run on them |
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131
diff
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|
2425 GCBits noscan; // entries that should not be scanned |
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131
diff
changeset
|
2426 |
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diff
changeset
|
2427 uint npages; |
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diff
changeset
|
2428 uint ncommitted; // ncommitted <= npages |
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diff
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|
2429 ubyte* pagetable; |
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2430 |
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2431 |
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2432 void initialize(uint npages) |
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2433 { |
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2434 size_t poolsize; |
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2435 |
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2436 //debug(PRINTF) printf("Pool::Pool(%u)\n", npages); |
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2437 poolsize = npages * PAGESIZE; |
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2438 assert(poolsize >= POOLSIZE); |
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2439 baseAddr = cast(byte *)os_mem_map(poolsize); |
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2440 |
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2441 // Some of the code depends on page alignment of memory pools |
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2442 assert((cast(uint)baseAddr & (PAGESIZE - 1)) == 0); |
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2443 |
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2444 if (!baseAddr) |
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2445 { |
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2446 //debug(PRINTF) printf("GC fail: poolsize = x%x, errno = %d\n", poolsize, errno); |
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2447 //debug(PRINTF) printf("message = '%s'\n", sys_errlist[errno]); |
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2448 |
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2449 npages = 0; |
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2450 poolsize = 0; |
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2451 } |
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2452 //assert(baseAddr); |
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2453 topAddr = baseAddr + poolsize; |
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2454 |
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2455 mark.alloc(poolsize / 16); |
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2456 scan.alloc(poolsize / 16); |
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2457 freebits.alloc(poolsize / 16); |
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2458 noscan.alloc(poolsize / 16); |
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2459 |
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2460 pagetable = cast(ubyte*)cstdlib.malloc(npages); |
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2461 if (!pagetable) |
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2462 onOutOfMemoryError(); |
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2463 cstring.memset(pagetable, B_UNCOMMITTED, npages); |
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2464 |
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2465 this.npages = npages; |
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2466 ncommitted = 0; |
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2467 } |
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2468 |
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2469 |
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2470 void Dtor() |
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2471 { |
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2472 if (baseAddr) |
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2473 { |
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2474 int result; |
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2475 |
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2476 if (ncommitted) |
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2477 { |
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2478 result = os_mem_decommit(baseAddr, 0, ncommitted * PAGESIZE); |
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2479 assert(result == 0); |
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2480 ncommitted = 0; |
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2481 } |
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|
2482 |
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2483 if (npages) |
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2484 { |
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2485 result = os_mem_unmap(baseAddr, npages * PAGESIZE); |
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2486 assert(result == 0); |
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2487 npages = 0; |
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2488 } |
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|
2489 |
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2490 baseAddr = null; |
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2491 topAddr = null; |
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2492 } |
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2493 if (pagetable) |
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2494 cstdlib.free(pagetable); |
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|
2495 |
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|
2496 mark.Dtor(); |
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2497 scan.Dtor(); |
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2498 freebits.Dtor(); |
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|
2499 finals.Dtor(); |
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|
2500 noscan.Dtor(); |
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|
2501 } |
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|
2502 |
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|
2503 |
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|
2504 void Invariant() { } |
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2505 |
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|
2506 |
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|
2507 invariant() |
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|
2508 { |
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2509 //mark.Invariant(); |
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2510 //scan.Invariant(); |
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2511 //freebits.Invariant(); |
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2512 //finals.Invariant(); |
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2513 //noscan.Invariant(); |
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2514 |
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2515 if (baseAddr) |
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|
2516 { |
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2517 //if (baseAddr + npages * PAGESIZE != topAddr) |
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2518 //printf("baseAddr = %p, npages = %d, topAddr = %p\n", baseAddr, npages, topAddr); |
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2519 assert(baseAddr + npages * PAGESIZE == topAddr); |
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|
2520 assert(ncommitted <= npages); |
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2521 } |
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|
2522 |
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2523 for (uint i = 0; i < npages; i++) |
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2524 { Bins bin = cast(Bins)pagetable[i]; |
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2525 |
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2526 assert(bin < B_MAX); |
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2527 } |
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2528 } |
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2529 |
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2530 |
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2531 /** |
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2532 * Allocate n pages from Pool. |
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2533 * Returns ~0u on failure. |
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2534 */ |
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2535 uint allocPages(uint n) |
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2536 { |
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2537 uint i; |
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2538 uint n2; |
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2539 |
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2540 //debug(PRINTF) printf("Pool::allocPages(n = %d)\n", n); |
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2541 n2 = n; |
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2542 for (i = 0; i < ncommitted; i++) |
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2543 { |
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2544 if (pagetable[i] == B_FREE) |
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2545 { |
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2546 if (--n2 == 0) |
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2547 { //debug(PRINTF) printf("\texisting pn = %d\n", i - n + 1); |
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2548 return i - n + 1; |
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|
2549 } |
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2550 } |
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2551 else |
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|
2552 n2 = n; |
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Applied downs' lphobos update
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131
diff
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|
2553 } |
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Applied downs' lphobos update
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|
2554 return extendPages(n); |
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131
diff
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|
2555 } |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2556 |
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131
diff
changeset
|
2557 /** |
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131
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|
2558 * Extend Pool by n pages. |
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|
2559 * Returns ~0u on failure. |
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|
2560 */ |
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diff
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|
2561 uint extendPages(uint n) |
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131
diff
changeset
|
2562 { |
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diff
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|
2563 //debug(PRINTF) printf("Pool::extendPages(n = %d)\n", n); |
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|
2564 if (ncommitted + n <= npages) |
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131
diff
changeset
|
2565 { |
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diff
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|
2566 uint tocommit; |
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131
diff
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|
2567 |
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|
2568 tocommit = (n + (COMMITSIZE/PAGESIZE) - 1) & ~(COMMITSIZE/PAGESIZE - 1); |
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Applied downs' lphobos update
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changeset
|
2569 if (ncommitted + tocommit > npages) |
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131
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|
2570 tocommit = npages - ncommitted; |
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131
diff
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|
2571 //debug(PRINTF) printf("\tlooking to commit %d more pages\n", tocommit); |
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|
2572 //fflush(stdout); |
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diff
changeset
|
2573 if (os_mem_commit(baseAddr, ncommitted * PAGESIZE, tocommit * PAGESIZE) == 0) |
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131
diff
changeset
|
2574 { |
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131
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|
2575 cstring.memset(pagetable + ncommitted, B_FREE, tocommit); |
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changeset
|
2576 auto i = ncommitted; |
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131
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|
2577 ncommitted += tocommit; |
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131
diff
changeset
|
2578 |
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131
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|
2579 while (i && pagetable[i - 1] == B_FREE) |
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131
diff
changeset
|
2580 i--; |
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131
diff
changeset
|
2581 |
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131
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changeset
|
2582 return i; |
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131
diff
changeset
|
2583 } |
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131
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changeset
|
2584 //debug(PRINTF) printf("\tfailed to commit %d pages\n", tocommit); |
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131
diff
changeset
|
2585 } |
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131
diff
changeset
|
2586 |
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diff
changeset
|
2587 return ~0u; |
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131
diff
changeset
|
2588 } |
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parents:
131
diff
changeset
|
2589 |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2590 |
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Applied downs' lphobos update
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131
diff
changeset
|
2591 /** |
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|
2592 * Free npages pages starting with pagenum. |
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131
diff
changeset
|
2593 */ |
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|
2594 void freePages(uint pagenum, uint npages) |
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131
diff
changeset
|
2595 { |
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131
diff
changeset
|
2596 cstring.memset(&pagetable[pagenum], B_FREE, npages); |
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131
diff
changeset
|
2597 } |
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parents:
131
diff
changeset
|
2598 |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2599 |
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131
diff
changeset
|
2600 /** |
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131
diff
changeset
|
2601 * Used for sorting pooltable[] |
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131
diff
changeset
|
2602 */ |
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131
diff
changeset
|
2603 int opCmp(Pool *p2) |
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131
diff
changeset
|
2604 { |
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131
diff
changeset
|
2605 if (baseAddr < p2.baseAddr) |
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131
diff
changeset
|
2606 return -1; |
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131
diff
changeset
|
2607 else |
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parents:
131
diff
changeset
|
2608 return cast(int)(baseAddr > p2.baseAddr); |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2609 } |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2610 } |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2611 |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
2612 |
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diff
changeset
|
2613 /* ============================ SENTINEL =============================== */ |
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131
diff
changeset
|
2614 |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2615 |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2616 version (SENTINEL) |
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Applied downs' lphobos update
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131
diff
changeset
|
2617 { |
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parents:
131
diff
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|
2618 const size_t SENTINEL_PRE = cast(size_t) 0xF4F4F4F4F4F4F4F4UL; // 32 or 64 bits |
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Applied downs' lphobos update
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diff
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|
2619 const ubyte SENTINEL_POST = 0xF5; // 8 bits |
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Applied downs' lphobos update
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131
diff
changeset
|
2620 const uint SENTINEL_EXTRA = 2 * size_t.sizeof + 1; |
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131
diff
changeset
|
2621 |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
2622 |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2623 size_t* sentinel_size(void *p) { return &(cast(size_t *)p)[-2]; } |
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131
diff
changeset
|
2624 size_t* sentinel_pre(void *p) { return &(cast(size_t *)p)[-1]; } |
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diff
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|
2625 ubyte* sentinel_post(void *p) { return &(cast(ubyte *)p)[sentinel_size(p)]; } |
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131
diff
changeset
|
2626 |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2627 |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2628 void sentinel_init(void *p, size_t size) |
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Applied downs' lphobos update
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131
diff
changeset
|
2629 { |
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Applied downs' lphobos update
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131
diff
changeset
|
2630 *sentinel_size(p) = size; |
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diff
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|
2631 *sentinel_pre(p) = SENTINEL_PRE; |
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diff
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|
2632 *sentinel_post(p) = SENTINEL_POST; |
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131
diff
changeset
|
2633 } |
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2634 |
373489eeaf90
Applied downs' lphobos update
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parents:
131
diff
changeset
|
2635 |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2636 void sentinel_Invariant(void *p) |
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Applied downs' lphobos update
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131
diff
changeset
|
2637 { |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2638 assert(*sentinel_pre(p) == SENTINEL_PRE); |
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Applied downs' lphobos update
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parents:
131
diff
changeset
|
2639 assert(*sentinel_post(p) == SENTINEL_POST); |
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131
diff
changeset
|
2640 } |
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parents:
131
diff
changeset
|
2641 |
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131
diff
changeset
|
2642 |
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diff
changeset
|
2643 void *sentinel_add(void *p) |
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131
diff
changeset
|
2644 { |
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diff
changeset
|
2645 return p + 2 * size_t.sizeof; |
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131
diff
changeset
|
2646 } |
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parents:
131
diff
changeset
|
2647 |
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parents:
131
diff
changeset
|
2648 |
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diff
changeset
|
2649 void *sentinel_sub(void *p) |
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131
diff
changeset
|
2650 { |
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diff
changeset
|
2651 return p - 2 * size_t.sizeof; |
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131
diff
changeset
|
2652 } |
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131
diff
changeset
|
2653 } |
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diff
changeset
|
2654 else |
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131
diff
changeset
|
2655 { |
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diff
changeset
|
2656 const uint SENTINEL_EXTRA = 0; |
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131
diff
changeset
|
2657 |
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parents:
131
diff
changeset
|
2658 |
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diff
changeset
|
2659 void sentinel_init(void *p, size_t size) |
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131
diff
changeset
|
2660 { |
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131
diff
changeset
|
2661 } |
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parents:
131
diff
changeset
|
2662 |
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parents:
131
diff
changeset
|
2663 |
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diff
changeset
|
2664 void sentinel_Invariant(void *p) |
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diff
changeset
|
2665 { |
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131
diff
changeset
|
2666 } |
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parents:
131
diff
changeset
|
2667 |
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parents:
131
diff
changeset
|
2668 |
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diff
changeset
|
2669 void *sentinel_add(void *p) |
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diff
changeset
|
2670 { |
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diff
changeset
|
2671 return p; |
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diff
changeset
|
2672 } |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2673 |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2674 |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2675 void *sentinel_sub(void *p) |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2676 { |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2677 return p; |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2678 } |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2679 } |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2680 |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
131
diff
changeset
|
2681 |