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1 //===--- Fuchsia.cpp - Fuchsia ToolChain Implementations --------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "Fuchsia.h"
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10 #include "CommonArgs.h"
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11 #include "clang/Config/config.h"
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12 #include "clang/Driver/Compilation.h"
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13 #include "clang/Driver/Driver.h"
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14 #include "clang/Driver/DriverDiagnostic.h"
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252
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15 #include "clang/Driver/MultilibBuilder.h"
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150
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16 #include "clang/Driver/Options.h"
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17 #include "clang/Driver/SanitizerArgs.h"
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18 #include "llvm/Option/ArgList.h"
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221
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19 #include "llvm/ProfileData/InstrProf.h"
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150
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20 #include "llvm/Support/FileSystem.h"
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21 #include "llvm/Support/Path.h"
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22 #include "llvm/Support/VirtualFileSystem.h"
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23
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24 using namespace clang::driver;
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25 using namespace clang::driver::toolchains;
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26 using namespace clang::driver::tools;
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27 using namespace clang;
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28 using namespace llvm::opt;
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29
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30 using tools::addMultilibFlag;
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31
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32 void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
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33 const InputInfo &Output,
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34 const InputInfoList &Inputs,
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35 const ArgList &Args,
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36 const char *LinkingOutput) const {
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37 const toolchains::Fuchsia &ToolChain =
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38 static_cast<const toolchains::Fuchsia &>(getToolChain());
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39 const Driver &D = ToolChain.getDriver();
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40
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236
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41 const llvm::Triple &Triple = ToolChain.getEffectiveTriple();
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42
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150
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43 ArgStringList CmdArgs;
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44
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45 // Silence warning for "clang -g foo.o -o foo"
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46 Args.ClaimAllArgs(options::OPT_g_Group);
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47 // and "clang -emit-llvm foo.o -o foo"
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48 Args.ClaimAllArgs(options::OPT_emit_llvm);
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49 // and for "clang -w foo.o -o foo". Other warning options are already
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50 // handled somewhere else.
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51 Args.ClaimAllArgs(options::OPT_w);
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52
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53 CmdArgs.push_back("-z");
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173
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54 CmdArgs.push_back("max-page-size=4096");
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55
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56 CmdArgs.push_back("-z");
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150
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57 CmdArgs.push_back("now");
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58
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59 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
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223
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60 if (llvm::sys::path::filename(Exec).equals_insensitive("ld.lld") ||
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61 llvm::sys::path::stem(Exec).equals_insensitive("ld.lld")) {
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150
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62 CmdArgs.push_back("-z");
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63 CmdArgs.push_back("rodynamic");
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64 CmdArgs.push_back("-z");
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65 CmdArgs.push_back("separate-loadable-segments");
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236
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66 CmdArgs.push_back("-z");
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67 CmdArgs.push_back("rel");
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173
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68 CmdArgs.push_back("--pack-dyn-relocs=relr");
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150
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69 }
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70
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71 if (!D.SysRoot.empty())
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72 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
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73
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74 if (!Args.hasArg(options::OPT_shared) && !Args.hasArg(options::OPT_r))
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75 CmdArgs.push_back("-pie");
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76
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77 if (Args.hasArg(options::OPT_rdynamic))
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78 CmdArgs.push_back("-export-dynamic");
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79
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80 if (Args.hasArg(options::OPT_s))
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81 CmdArgs.push_back("-s");
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82
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83 if (Args.hasArg(options::OPT_r)) {
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84 CmdArgs.push_back("-r");
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85 } else {
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86 CmdArgs.push_back("--build-id");
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87 CmdArgs.push_back("--hash-style=gnu");
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88 }
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89
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236
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90 if (ToolChain.getArch() == llvm::Triple::aarch64) {
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91 CmdArgs.push_back("--execute-only");
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92
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93 std::string CPU = getCPUName(D, Args, Triple);
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94 if (CPU.empty() || CPU == "generic" || CPU == "cortex-a53")
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95 CmdArgs.push_back("--fix-cortex-a53-843419");
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96 }
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97
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150
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98 CmdArgs.push_back("--eh-frame-hdr");
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99
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100 if (Args.hasArg(options::OPT_static))
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101 CmdArgs.push_back("-Bstatic");
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102 else if (Args.hasArg(options::OPT_shared))
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103 CmdArgs.push_back("-shared");
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104
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236
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105 const SanitizerArgs &SanArgs = ToolChain.getSanitizerArgs(Args);
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106
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236
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107 if (!Args.hasArg(options::OPT_shared) && !Args.hasArg(options::OPT_r)) {
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108 std::string Dyld = D.DyldPrefix;
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109 if (SanArgs.needsAsanRt() && SanArgs.needsSharedRt())
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110 Dyld += "asan/";
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221
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111 if (SanArgs.needsHwasanRt() && SanArgs.needsSharedRt())
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112 Dyld += "hwasan/";
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113 if (SanArgs.needsTsanRt() && SanArgs.needsSharedRt())
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114 Dyld += "tsan/";
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115 Dyld += "ld.so.1";
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116 CmdArgs.push_back("-dynamic-linker");
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117 CmdArgs.push_back(Args.MakeArgString(Dyld));
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118 }
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119
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236
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120 if (ToolChain.getArch() == llvm::Triple::riscv64)
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121 CmdArgs.push_back("-X");
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122
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123 CmdArgs.push_back("-o");
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124 CmdArgs.push_back(Output.getFilename());
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125
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236
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126 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
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127 options::OPT_r)) {
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150
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128 if (!Args.hasArg(options::OPT_shared)) {
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129 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("Scrt1.o")));
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130 }
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131 }
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132
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133 Args.AddAllArgs(CmdArgs, options::OPT_L);
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134 Args.AddAllArgs(CmdArgs, options::OPT_u);
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135
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136 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
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137
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138 if (D.isUsingLTO()) {
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139 assert(!Inputs.empty() && "Must have at least one input.");
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173
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140 addLTOOptions(ToolChain, Args, CmdArgs, Output, Inputs[0],
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141 D.getLTOMode() == LTOK_Thin);
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142 }
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143
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236
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144 addLinkerCompressDebugSectionsOption(ToolChain, Args, CmdArgs);
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150
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145 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
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146
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236
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147 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
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148 options::OPT_r)) {
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150
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149 if (Args.hasArg(options::OPT_static))
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150 CmdArgs.push_back("-Bdynamic");
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151
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152 if (D.CCCIsCXX()) {
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153 if (ToolChain.ShouldLinkCXXStdlib(Args)) {
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154 bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
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155 !Args.hasArg(options::OPT_static);
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156 CmdArgs.push_back("--push-state");
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157 CmdArgs.push_back("--as-needed");
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158 if (OnlyLibstdcxxStatic)
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159 CmdArgs.push_back("-Bstatic");
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160 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
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161 if (OnlyLibstdcxxStatic)
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162 CmdArgs.push_back("-Bdynamic");
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163 CmdArgs.push_back("-lm");
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164 CmdArgs.push_back("--pop-state");
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165 }
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166 }
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167
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236
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168 // Note that Fuchsia never needs to link in sanitizer runtime deps. Any
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169 // sanitizer runtimes with system dependencies use the `.deplibs` feature
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170 // instead.
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171 addSanitizerRuntimes(ToolChain, Args, CmdArgs);
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150
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172
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236
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173 addXRayRuntime(ToolChain, Args, CmdArgs);
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174
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175 ToolChain.addProfileRTLibs(Args, CmdArgs);
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150
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176
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177 AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
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178
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179 if (Args.hasArg(options::OPT_pthread) ||
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180 Args.hasArg(options::OPT_pthreads))
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181 CmdArgs.push_back("-lpthread");
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182
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183 if (Args.hasArg(options::OPT_fsplit_stack))
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184 CmdArgs.push_back("--wrap=pthread_create");
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185
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186 if (!Args.hasArg(options::OPT_nolibc))
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187 CmdArgs.push_back("-lc");
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188 }
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189
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252
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190 C.addCommand(std::make_unique<Command>(JA, *this,
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191 ResponseFileSupport::AtFileCurCP(),
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192 Exec, CmdArgs, Inputs, Output));
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193 }
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194
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195 void fuchsia::StaticLibTool::ConstructJob(Compilation &C, const JobAction &JA,
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196 const InputInfo &Output,
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197 const InputInfoList &Inputs,
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198 const ArgList &Args,
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199 const char *LinkingOutput) const {
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200 const Driver &D = getToolChain().getDriver();
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201
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202 // Silence warning for "clang -g foo.o -o foo"
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203 Args.ClaimAllArgs(options::OPT_g_Group);
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204 // and "clang -emit-llvm foo.o -o foo"
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205 Args.ClaimAllArgs(options::OPT_emit_llvm);
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206 // and for "clang -w foo.o -o foo". Other warning options are already
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207 // handled somewhere else.
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208 Args.ClaimAllArgs(options::OPT_w);
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209 // Silence warnings when linking C code with a C++ '-stdlib' argument.
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210 Args.ClaimAllArgs(options::OPT_stdlib_EQ);
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211
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212 // ar tool command "llvm-ar <options> <output_file> <input_files>".
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213 ArgStringList CmdArgs;
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214 // Create and insert file members with a deterministic index.
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215 CmdArgs.push_back("rcsD");
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216 CmdArgs.push_back(Output.getFilename());
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217
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218 for (const auto &II : Inputs) {
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219 if (II.isFilename()) {
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220 CmdArgs.push_back(II.getFilename());
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221 }
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222 }
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223
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224 // Delete old output archive file if it already exists before generating a new
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225 // archive file.
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226 const char *OutputFileName = Output.getFilename();
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227 if (Output.isFilename() && llvm::sys::fs::exists(OutputFileName)) {
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228 if (std::error_code EC = llvm::sys::fs::remove(OutputFileName)) {
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229 D.Diag(diag::err_drv_unable_to_remove_file) << EC.message();
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230 return;
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231 }
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232 }
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233
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234 const char *Exec = Args.MakeArgString(getToolChain().GetStaticLibToolPath());
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235 C.addCommand(std::make_unique<Command>(JA, *this,
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236 ResponseFileSupport::AtFileCurCP(),
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221
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237 Exec, CmdArgs, Inputs, Output));
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150
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238 }
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239
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240 /// Fuchsia - Fuchsia tool chain which can call as(1) and ld(1) directly.
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241
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242 Fuchsia::Fuchsia(const Driver &D, const llvm::Triple &Triple,
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243 const ArgList &Args)
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244 : ToolChain(D, Triple, Args) {
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245 getProgramPaths().push_back(getDriver().getInstalledDir());
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246 if (getDriver().getInstalledDir() != D.Dir)
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247 getProgramPaths().push_back(D.Dir);
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248
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249 if (!D.SysRoot.empty()) {
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250 SmallString<128> P(D.SysRoot);
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251 llvm::sys::path::append(P, "lib");
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252 getFilePaths().push_back(std::string(P.str()));
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253 }
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254
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255 auto FilePaths = [&](const Multilib &M) -> std::vector<std::string> {
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256 std::vector<std::string> FP;
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236
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257 for (const std::string &Path : getStdlibPaths()) {
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258 SmallString<128> P(Path);
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259 llvm::sys::path::append(P, M.gccSuffix());
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260 FP.push_back(std::string(P.str()));
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261 }
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150
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262 return FP;
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263 };
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264
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265 Multilibs.push_back(Multilib());
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266 // Use the noexcept variant with -fno-exceptions to avoid the extra overhead.
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252
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267 Multilibs.push_back(MultilibBuilder("noexcept", {}, {})
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268 .flag("-fexceptions", /*Disallow=*/true)
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269 .flag("-fno-exceptions")
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270 .makeMultilib());
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150
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271 // ASan has higher priority because we always want the instrumentated version.
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252
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272 Multilibs.push_back(MultilibBuilder("asan", {}, {})
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273 .flag("-fsanitize=address")
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274 .makeMultilib());
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150
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275 // Use the asan+noexcept variant with ASan and -fno-exceptions.
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252
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276 Multilibs.push_back(MultilibBuilder("asan+noexcept", {}, {})
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277 .flag("-fsanitize=address")
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278 .flag("-fexceptions", /*Disallow=*/true)
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279 .flag("-fno-exceptions")
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280 .makeMultilib());
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221
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281 // HWASan has higher priority because we always want the instrumentated
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282 // version.
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252
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283 Multilibs.push_back(MultilibBuilder("hwasan", {}, {})
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284 .flag("-fsanitize=hwaddress")
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285 .makeMultilib());
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221
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286 // Use the hwasan+noexcept variant with HWASan and -fno-exceptions.
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252
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287 Multilibs.push_back(MultilibBuilder("hwasan+noexcept", {}, {})
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288 .flag("-fsanitize=hwaddress")
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289 .flag("-fexceptions", /*Disallow=*/true)
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290 .flag("-fno-exceptions")
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291 .makeMultilib());
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221
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292 // Use Itanium C++ ABI for the compat multilib.
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252
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293 Multilibs.push_back(MultilibBuilder("compat", {}, {})
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294 .flag("-fc++-abi=itanium")
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295 .makeMultilib());
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221
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296
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150
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297 Multilibs.FilterOut([&](const Multilib &M) {
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298 std::vector<std::string> RD = FilePaths(M);
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236
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299 return llvm::all_of(RD, [&](std::string P) { return !getVFS().exists(P); });
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150
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300 });
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301
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302 Multilib::flags_list Flags;
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252
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303 bool Exceptions =
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304 Args.hasFlag(options::OPT_fexceptions, options::OPT_fno_exceptions, true);
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305 addMultilibFlag(Exceptions, "-fexceptions", Flags);
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306 addMultilibFlag(!Exceptions, "-fno-exceptions", Flags);
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307 addMultilibFlag(getSanitizerArgs(Args).needsAsanRt(), "-fsanitize=address",
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236
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308 Flags);
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252
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309 addMultilibFlag(getSanitizerArgs(Args).needsHwasanRt(),
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310 "-fsanitize=hwaddress", Flags);
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221
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311
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312 addMultilibFlag(Args.getLastArgValue(options::OPT_fcxx_abi_EQ) == "itanium",
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252
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313 "-fc++-abi=itanium", Flags);
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221
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314
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150
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315 Multilibs.setFilePathsCallback(FilePaths);
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316
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252
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317 if (Multilibs.select(Flags, SelectedMultilibs)) {
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318 // Ensure that -print-multi-directory only outputs one multilib directory.
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319 Multilib LastSelected = SelectedMultilibs.back();
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320 SelectedMultilibs = {LastSelected};
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321
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322 if (!SelectedMultilibs.back().isDefault())
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150
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323 if (const auto &PathsCallback = Multilibs.filePathsCallback())
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252
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324 for (const auto &Path : PathsCallback(SelectedMultilibs.back()))
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150
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325 // Prepend the multilib path to ensure it takes the precedence.
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326 getFilePaths().insert(getFilePaths().begin(), Path);
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252
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327 }
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150
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328 }
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329
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330 std::string Fuchsia::ComputeEffectiveClangTriple(const ArgList &Args,
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331 types::ID InputType) const {
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332 llvm::Triple Triple(ComputeLLVMTriple(Args, InputType));
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333 return Triple.str();
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334 }
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335
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336 Tool *Fuchsia::buildLinker() const {
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337 return new tools::fuchsia::Linker(*this);
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338 }
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339
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252
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340 Tool *Fuchsia::buildStaticLibTool() const {
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341 return new tools::fuchsia::StaticLibTool(*this);
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342 }
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343
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150
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344 ToolChain::RuntimeLibType Fuchsia::GetRuntimeLibType(
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345 const ArgList &Args) const {
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346 if (Arg *A = Args.getLastArg(clang::driver::options::OPT_rtlib_EQ)) {
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347 StringRef Value = A->getValue();
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348 if (Value != "compiler-rt")
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349 getDriver().Diag(clang::diag::err_drv_invalid_rtlib_name)
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350 << A->getAsString(Args);
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351 }
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352
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353 return ToolChain::RLT_CompilerRT;
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354 }
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355
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356 ToolChain::CXXStdlibType
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357 Fuchsia::GetCXXStdlibType(const ArgList &Args) const {
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358 if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
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359 StringRef Value = A->getValue();
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360 if (Value != "libc++")
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361 getDriver().Diag(diag::err_drv_invalid_stdlib_name)
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362 << A->getAsString(Args);
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363 }
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364
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365 return ToolChain::CST_Libcxx;
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366 }
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367
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368 void Fuchsia::addClangTargetOptions(const ArgList &DriverArgs,
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369 ArgStringList &CC1Args,
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370 Action::OffloadKind) const {
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371 if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
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372 options::OPT_fno_use_init_array, true))
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373 CC1Args.push_back("-fno-use-init-array");
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374 }
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375
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376 void Fuchsia::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
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377 ArgStringList &CC1Args) const {
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378 const Driver &D = getDriver();
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379
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380 if (DriverArgs.hasArg(options::OPT_nostdinc))
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381 return;
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382
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383 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
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384 SmallString<128> P(D.ResourceDir);
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385 llvm::sys::path::append(P, "include");
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386 addSystemInclude(DriverArgs, CC1Args, P);
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387 }
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388
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389 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
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390 return;
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391
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392 // Check for configure-time C include directories.
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393 StringRef CIncludeDirs(C_INCLUDE_DIRS);
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394 if (CIncludeDirs != "") {
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395 SmallVector<StringRef, 5> dirs;
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396 CIncludeDirs.split(dirs, ":");
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397 for (StringRef dir : dirs) {
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398 StringRef Prefix =
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173
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399 llvm::sys::path::is_absolute(dir) ? "" : StringRef(D.SysRoot);
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150
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400 addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
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401 }
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402 return;
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403 }
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404
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405 if (!D.SysRoot.empty()) {
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406 SmallString<128> P(D.SysRoot);
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407 llvm::sys::path::append(P, "include");
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408 addExternCSystemInclude(DriverArgs, CC1Args, P.str());
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409 }
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410 }
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411
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412 void Fuchsia::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
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413 ArgStringList &CC1Args) const {
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252
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414 if (DriverArgs.hasArg(options::OPT_nostdinc, options::OPT_nostdlibinc,
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|
415 options::OPT_nostdincxx))
|
|
150
|
416 return;
|
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|
417
|
|
221
|
418 const Driver &D = getDriver();
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|
|
419 std::string Target = getTripleString();
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420
|
|
|
421 auto AddCXXIncludePath = [&](StringRef Path) {
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|
|
422 std::string Version = detectLibcxxVersion(Path);
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|
|
423 if (Version.empty())
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|
|
424 return;
|
|
|
425
|
|
|
426 // First add the per-target include path.
|
|
|
427 SmallString<128> TargetDir(Path);
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|
|
428 llvm::sys::path::append(TargetDir, Target, "c++", Version);
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|
|
429 if (getVFS().exists(TargetDir))
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|
|
430 addSystemInclude(DriverArgs, CC1Args, TargetDir);
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|
|
431
|
|
|
432 // Second add the generic one.
|
|
|
433 SmallString<128> Dir(Path);
|
|
|
434 llvm::sys::path::append(Dir, "c++", Version);
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|
|
435 addSystemInclude(DriverArgs, CC1Args, Dir);
|
|
|
436 };
|
|
|
437
|
|
150
|
438 switch (GetCXXStdlibType(DriverArgs)) {
|
|
|
439 case ToolChain::CST_Libcxx: {
|
|
221
|
440 SmallString<128> P(D.Dir);
|
|
|
441 llvm::sys::path::append(P, "..", "include");
|
|
|
442 AddCXXIncludePath(P);
|
|
150
|
443 break;
|
|
|
444 }
|
|
|
445
|
|
|
446 default:
|
|
|
447 llvm_unreachable("invalid stdlib name");
|
|
|
448 }
|
|
|
449 }
|
|
|
450
|
|
|
451 void Fuchsia::AddCXXStdlibLibArgs(const ArgList &Args,
|
|
|
452 ArgStringList &CmdArgs) const {
|
|
|
453 switch (GetCXXStdlibType(Args)) {
|
|
|
454 case ToolChain::CST_Libcxx:
|
|
|
455 CmdArgs.push_back("-lc++");
|
|
236
|
456 if (Args.hasArg(options::OPT_fexperimental_library))
|
|
|
457 CmdArgs.push_back("-lc++experimental");
|
|
150
|
458 break;
|
|
|
459
|
|
|
460 case ToolChain::CST_Libstdcxx:
|
|
|
461 llvm_unreachable("invalid stdlib name");
|
|
|
462 }
|
|
|
463 }
|
|
|
464
|
|
|
465 SanitizerMask Fuchsia::getSupportedSanitizers() const {
|
|
|
466 SanitizerMask Res = ToolChain::getSupportedSanitizers();
|
|
|
467 Res |= SanitizerKind::Address;
|
|
221
|
468 Res |= SanitizerKind::HWAddress;
|
|
150
|
469 Res |= SanitizerKind::PointerCompare;
|
|
|
470 Res |= SanitizerKind::PointerSubtract;
|
|
|
471 Res |= SanitizerKind::Fuzzer;
|
|
|
472 Res |= SanitizerKind::FuzzerNoLink;
|
|
|
473 Res |= SanitizerKind::Leak;
|
|
|
474 Res |= SanitizerKind::SafeStack;
|
|
|
475 Res |= SanitizerKind::Scudo;
|
|
221
|
476 Res |= SanitizerKind::Thread;
|
|
150
|
477 return Res;
|
|
|
478 }
|
|
|
479
|
|
|
480 SanitizerMask Fuchsia::getDefaultSanitizers() const {
|
|
|
481 SanitizerMask Res;
|
|
|
482 switch (getTriple().getArch()) {
|
|
|
483 case llvm::Triple::aarch64:
|
|
252
|
484 case llvm::Triple::riscv64:
|
|
150
|
485 Res |= SanitizerKind::ShadowCallStack;
|
|
|
486 break;
|
|
|
487 case llvm::Triple::x86_64:
|
|
|
488 Res |= SanitizerKind::SafeStack;
|
|
|
489 break;
|
|
|
490 default:
|
|
|
491 break;
|
|
|
492 }
|
|
|
493 return Res;
|
|
|
494 }
|
