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//===--- Fuchsia.cpp - Fuchsia ToolChain Implementations --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Fuchsia.h"
#include "CommonArgs.h"
#include "clang/Config/config.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/SanitizerArgs.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/Path.h"
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang::driver::tools;
using namespace clang;
using namespace llvm::opt;
void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
const toolchains::Fuchsia &ToolChain =
static_cast<const toolchains::Fuchsia &>(getToolChain());
const Driver &D = ToolChain.getDriver();
ArgStringList CmdArgs;
// Silence warning for "clang -g foo.o -o foo"
Args.ClaimAllArgs(options::OPT_g_Group);
// and "clang -emit-llvm foo.o -o foo"
Args.ClaimAllArgs(options::OPT_emit_llvm);
// and for "clang -w foo.o -o foo". Other warning options are already
// handled somewhere else.
Args.ClaimAllArgs(options::OPT_w);
const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
if (llvm::sys::path::filename(Exec).equals_lower("ld.lld") ||
llvm::sys::path::stem(Exec).equals_lower("ld.lld")) {
CmdArgs.push_back("-z");
CmdArgs.push_back("rodynamic");
}
if (!D.SysRoot.empty())
CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
if (!Args.hasArg(options::OPT_shared) && !Args.hasArg(options::OPT_r))
CmdArgs.push_back("-pie");
if (Args.hasArg(options::OPT_rdynamic))
CmdArgs.push_back("-export-dynamic");
if (Args.hasArg(options::OPT_s))
CmdArgs.push_back("-s");
if (Args.hasArg(options::OPT_r)) {
CmdArgs.push_back("-r");
} else {
CmdArgs.push_back("--build-id");
CmdArgs.push_back("--hash-style=gnu");
}
CmdArgs.push_back("--eh-frame-hdr");
if (Args.hasArg(options::OPT_static))
CmdArgs.push_back("-Bstatic");
else if (Args.hasArg(options::OPT_shared))
CmdArgs.push_back("-shared");
if (!Args.hasArg(options::OPT_shared)) {
std::string Dyld = D.DyldPrefix;
if (ToolChain.getSanitizerArgs().needsAsanRt() &&
ToolChain.getSanitizerArgs().needsSharedRt())
Dyld += "asan/";
Dyld += "ld.so.1";
CmdArgs.push_back("-dynamic-linker");
CmdArgs.push_back(Args.MakeArgString(Dyld));
}
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
if (!Args.hasArg(options::OPT_shared)) {
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("Scrt1.o")));
}
}
Args.AddAllArgs(CmdArgs, options::OPT_L);
Args.AddAllArgs(CmdArgs, options::OPT_u);
ToolChain.AddFilePathLibArgs(Args, CmdArgs);
if (D.isUsingLTO()) {
assert(!Inputs.empty() && "Must have at least one input.");
AddGoldPlugin(ToolChain, Args, CmdArgs, Output, Inputs[0],
D.getLTOMode() == LTOK_Thin);
}
addSanitizerRuntimes(ToolChain, Args, CmdArgs);
AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
ToolChain.addProfileRTLibs(Args, CmdArgs);
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
if (Args.hasArg(options::OPT_static))
CmdArgs.push_back("-Bdynamic");
if (D.CCCIsCXX()) {
if (ToolChain.ShouldLinkCXXStdlib(Args)) {
bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
!Args.hasArg(options::OPT_static);
if (OnlyLibstdcxxStatic)
CmdArgs.push_back("-Bstatic");
ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
if (OnlyLibstdcxxStatic)
CmdArgs.push_back("-Bdynamic");
}
CmdArgs.push_back("-lm");
}
AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
if (Args.hasArg(options::OPT_pthread) ||
Args.hasArg(options::OPT_pthreads))
CmdArgs.push_back("-lpthread");
if (Args.hasArg(options::OPT_fsplit_stack))
CmdArgs.push_back("--wrap=pthread_create");
CmdArgs.push_back("-lc");
}
C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
}
/// Fuchsia - Fuchsia tool chain which can call as(1) and ld(1) directly.
Fuchsia::Fuchsia(const Driver &D, const llvm::Triple &Triple,
const ArgList &Args)
: ToolChain(D, Triple, Args) {
getProgramPaths().push_back(getDriver().getInstalledDir());
if (getDriver().getInstalledDir() != D.Dir)
getProgramPaths().push_back(D.Dir);
if (!D.SysRoot.empty()) {
SmallString<128> P(D.SysRoot);
llvm::sys::path::append(P, "lib");
getFilePaths().push_back(P.str());
}
}
std::string Fuchsia::ComputeEffectiveClangTriple(const ArgList &Args,
types::ID InputType) const {
llvm::Triple Triple(ComputeLLVMTriple(Args, InputType));
return (Triple.getArchName() + "-" + Triple.getOSName()).str();
}
Tool *Fuchsia::buildLinker() const {
return new tools::fuchsia::Linker(*this);
}
ToolChain::RuntimeLibType Fuchsia::GetRuntimeLibType(
const ArgList &Args) const {
if (Arg *A = Args.getLastArg(clang::driver::options::OPT_rtlib_EQ)) {
StringRef Value = A->getValue();
if (Value != "compiler-rt")
getDriver().Diag(clang::diag::err_drv_invalid_rtlib_name)
<< A->getAsString(Args);
}
return ToolChain::RLT_CompilerRT;
}
ToolChain::CXXStdlibType
Fuchsia::GetCXXStdlibType(const ArgList &Args) const {
if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
StringRef Value = A->getValue();
if (Value != "libc++")
getDriver().Diag(diag::err_drv_invalid_stdlib_name)
<< A->getAsString(Args);
}
return ToolChain::CST_Libcxx;
}
void Fuchsia::addClangTargetOptions(const ArgList &DriverArgs,
ArgStringList &CC1Args,
Action::OffloadKind) const {
if (DriverArgs.hasFlag(options::OPT_fuse_init_array,
options::OPT_fno_use_init_array, true))
CC1Args.push_back("-fuse-init-array");
}
void Fuchsia::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
const Driver &D = getDriver();
if (DriverArgs.hasArg(options::OPT_nostdinc))
return;
if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
SmallString<128> P(D.ResourceDir);
llvm::sys::path::append(P, "include");
addSystemInclude(DriverArgs, CC1Args, P);
}
if (DriverArgs.hasArg(options::OPT_nostdlibinc))
return;
// Check for configure-time C include directories.
StringRef CIncludeDirs(C_INCLUDE_DIRS);
if (CIncludeDirs != "") {
SmallVector<StringRef, 5> dirs;
CIncludeDirs.split(dirs, ":");
for (StringRef dir : dirs) {
StringRef Prefix =
llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
}
return;
}
if (!D.SysRoot.empty()) {
SmallString<128> P(D.SysRoot);
llvm::sys::path::append(P, "include");
addExternCSystemInclude(DriverArgs, CC1Args, P.str());
}
}
void Fuchsia::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
DriverArgs.hasArg(options::OPT_nostdincxx))
return;
switch (GetCXXStdlibType(DriverArgs)) {
case ToolChain::CST_Libcxx: {
SmallString<128> P(getDriver().ResourceDir);
llvm::sys::path::append(P, "include", "c++", "v1");
addSystemInclude(DriverArgs, CC1Args, P.str());
break;
}
default:
llvm_unreachable("invalid stdlib name");
}
}
void Fuchsia::AddCXXStdlibLibArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
switch (GetCXXStdlibType(Args)) {
case ToolChain::CST_Libcxx:
CmdArgs.push_back("-lc++");
break;
case ToolChain::CST_Libstdcxx:
llvm_unreachable("invalid stdlib name");
}
}
SanitizerMask Fuchsia::getSupportedSanitizers() const {
SanitizerMask Res = ToolChain::getSupportedSanitizers();
Res |= SanitizerKind::Address;
Res |= SanitizerKind::Fuzzer;
Res |= SanitizerKind::FuzzerNoLink;
Res |= SanitizerKind::SafeStack;
Res |= SanitizerKind::Scudo;
return Res;
}
SanitizerMask Fuchsia::getDefaultSanitizers() const {
return SanitizerKind::SafeStack;
}