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annotate gen/linker.cpp @ 276:21f85bac0b1a trunk

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[svn r297] Fixed: rewrote linker code to use LLVM's Program facilities instead of DMD's oldschool broken "native" approach.
author lindquist
date Fri, 20 Jun 2008 17:45:13 +0200
parents a95056b3c996
children 90a8c798b0db
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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a95056b3c996 [svn r261] Fixed debug info for integer and floating local variables, can now be inspected in GDB.
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1 #include "gen/llvm.h"
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2 #include "llvm/Linker.h"
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3 #include "llvm/System/Program.h"
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4
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5 #include "root.h"
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6 #include "mars.h"
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7 #include "module.h"
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8
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9 #define NO_COUT_LOGGER
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10 #include "gen/logger.h"
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11
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12 //////////////////////////////////////////////////////////////////////////////
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13
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14 typedef std::vector<llvm::Module*> Module_vector;
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15
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16 void linkModules(llvm::Module* dst, const Module_vector& MV)
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17 {
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18 if (MV.empty())
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19 return;
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20
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21 llvm::Linker linker("llvmdc", dst);
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22
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23 std::string err;
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24 for (Module_vector::const_iterator i=MV.begin(); i!=MV.end(); ++i)
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25 {
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26 if (!linker.LinkInModule(*i, &err))
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27 {
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28 error("%s", err.c_str());
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29 fatal();
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30 }
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31 }
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32 }
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33
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34 //////////////////////////////////////////////////////////////////////////////
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35
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36 int linkExecutable()
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37 {
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38 Logger::println("*** Linking executable ***");
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39
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40 // error string
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41 std::string errstr;
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42
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43 // find the llvm-ld program
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44 llvm::sys::Path ldpath = llvm::sys::Program::FindProgramByName("llvm-ld");
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45 if (ldpath.isEmpty())
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46 {
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47 error("linker program not found");
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48 fatal();
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49 }
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50
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51 // build arguments
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52 std::vector<const char*> args;
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53
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54 // first the program name ??
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55 args.push_back("llvm-ld");
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56
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57 // output filename
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58 std::string exestr;
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59 if (global.params.exefile)
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60 { // explicit
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61 exestr = global.params.exefile;
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62 }
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63 else
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64 { // inferred
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65 // try root module name
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66 if (Module::rootModule)
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67 exestr = Module::rootModule->toChars();
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68 else
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69 exestr = "a.out";
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70 }
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71 if (global.params.isWindows)
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72 exestr.append(".exe");
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73
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74 std::string outopt = "-o=" + exestr;
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75 args.push_back(outopt.c_str());
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76
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77 // create path to exe
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78 llvm::sys::Path exepath(exestr);
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79 exepath.set(exepath.getDirname());
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80 exepath.createDirectoryOnDisk(true, &errstr);
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81 if (!errstr.empty())
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82 {
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83 error("failed to create path to linking output\n%s", errstr.c_str());
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84 fatal();
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85 }
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86
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87 // strip debug info
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88 if (!global.params.symdebug)
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89 args.push_back("-strip-debug");
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90
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91 // optimization level
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92 if (!global.params.optimize)
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93 args.push_back("-disable-opt");
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94 else
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95 {
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96 const char* s = 0;
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97 switch(global.params.optimizeLevel)
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98 {
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99 case 0:
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100 s = "-O0"; break;
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101 case 1:
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102 s = "-O1"; break;
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103 case 2:
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104 s = "-O2"; break;
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105 case 3:
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106 s = "-O3"; break;
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107 case 4:
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108 s = "-O4"; break;
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109 case 5:
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110 s = "-O5"; break;
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111 default:
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112 assert(0);
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113 }
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114 args.push_back(s);
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115 }
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116
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117 // inlining
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118 if (!(global.params.useInline || global.params.llvmInline))
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119 {
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120 args.push_back("-disable-inlining");
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121 }
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122
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123 // additional linker switches
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124 for (int i = 0; i < global.params.linkswitches->dim; i++)
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125 {
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126 char *p = (char *)global.params.linkswitches->data[i];
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127 args.push_back(p);
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128 }
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129
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130 // native please
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131 args.push_back("-native");
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132
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133
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134 // user libs
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135 for (int i = 0; i < global.params.libfiles->dim; i++)
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136 {
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137 char *p = (char *)global.params.libfiles->data[i];
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138 args.push_back(p);
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139 }
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140
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141 // default libs
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142 args.push_back("-ltango-base-c-llvmdc");
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143 args.push_back("-lpthread");
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144 args.push_back("-ldl");
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145 args.push_back("-lm");
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146
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147 // object files
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148 for (int i = 0; i < global.params.objfiles->dim; i++)
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149 {
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150 char *p = (char *)global.params.objfiles->data[i];
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151 args.push_back(p);
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152 }
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153
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154 // runtime library
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155 // must be linked in last to null terminate the moduleinfo appending list
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156 std::string runtime_path(global.params.runtimePath);
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157 if (*runtime_path.rbegin() != '/')
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158 runtime_path.append("/");
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159 runtime_path.append("libtango-base-llvmdc.a");
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160 args.push_back(runtime_path.c_str());
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161
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162 // print link command?
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163 if (!global.params.quiet || global.params.verbose)
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164 {
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165 // Print it
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166 for (int i = 0; i < args.size(); i++)
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167 printf("%s ", args[i]);
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168 printf("\n");
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169 fflush(stdout);
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170 }
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171
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172 // terminate args list
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173 args.push_back(NULL);
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174
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175 // try to call linker!!!
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176 if (int status = llvm::sys::Program::ExecuteAndWait(ldpath, &args[0], NULL, NULL, 0,0, &errstr))
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177 {
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178 error("linking failed:\nstatus: %d", status);
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179 if (!errstr.empty())
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180 error("message: %s", errstr.c_str());
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181 fatal();
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182 }
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183 }