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llvm-project/clang/lib/Driver/ToolChains/AIX.cpp

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//===--- AIX.cpp - AIX ToolChain Implementations ----------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "AIX.h"
#include "Arch/PPC.h"
#include "CommonArgs.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/SanitizerArgs.h"
#include "llvm/Option/ArgList.h"
#include "llvm/ProfileData/InstrProf.h"
#include "llvm/Support/Path.h"
using AIX = clang::driver::toolchains::AIX;
using namespace clang::driver;
using namespace clang::driver::tools;
using namespace clang::driver::toolchains;
using namespace llvm::opt;
using namespace llvm::sys;
void aix::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
ArgStringList CmdArgs;
const bool IsArch32Bit = getToolChain().getTriple().isArch32Bit();
const bool IsArch64Bit = getToolChain().getTriple().isArch64Bit();
// Only support 32 and 64 bit.
if (!IsArch32Bit && !IsArch64Bit)
llvm_unreachable("Unsupported bit width value.");
// Specify the mode in which the as(1) command operates.
if (IsArch32Bit) {
CmdArgs.push_back("-a32");
} else {
// Must be 64-bit, otherwise asserted already.
CmdArgs.push_back("-a64");
}
// Accept any mixture of instructions.
// On Power for AIX and Linux, this behaviour matches that of GCC for both the
// user-provided assembler source case and the compiler-produced assembler
// source case. Yet XL with user-provided assembler source would not add this.
CmdArgs.push_back("-many");
Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
// Specify assembler output file.
assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
if (Output.isFilename()) {
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
}
// Specify assembler input file.
// The system assembler on AIX takes exactly one input file. The driver is
// expected to invoke as(1) separately for each assembler source input file.
if (Inputs.size() != 1)
llvm_unreachable("Invalid number of input files.");
const InputInfo &II = Inputs[0];
assert((II.isFilename() || II.isNothing()) && "Invalid input.");
if (II.isFilename())
CmdArgs.push_back(II.getFilename());
const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
Exec, CmdArgs, Inputs, Output));
}
// Determine whether there are any linker options that supply an export list
// (or equivalent information about what to export) being sent to the linker.
static bool hasExportListLinkerOpts(const ArgStringList &CmdArgs) {
for (size_t i = 0, Size = CmdArgs.size(); i < Size; ++i) {
llvm::StringRef ArgString(CmdArgs[i]);
if (ArgString.startswith("-bE:") || ArgString.startswith("-bexport:") ||
ArgString == "-bexpall" || ArgString == "-bexpfull")
return true;
// If we split -b option, check the next opt.
if (ArgString == "-b" && i + 1 < Size) {
++i;
llvm::StringRef ArgNextString(CmdArgs[i]);
if (ArgNextString.startswith("E:") ||
ArgNextString.startswith("export:") || ArgNextString == "expall" ||
ArgNextString == "expfull")
return true;
}
}
return false;
}
void aix::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs, const ArgList &Args,
const char *LinkingOutput) const {
const AIX &ToolChain = static_cast<const AIX &>(getToolChain());
const Driver &D = ToolChain.getDriver();
ArgStringList CmdArgs;
const bool IsArch32Bit = ToolChain.getTriple().isArch32Bit();
const bool IsArch64Bit = ToolChain.getTriple().isArch64Bit();
// Only support 32 and 64 bit.
if (!(IsArch32Bit || IsArch64Bit))
llvm_unreachable("Unsupported bit width value.");
// Force static linking when "-static" is present.
if (Args.hasArg(options::OPT_static))
CmdArgs.push_back("-bnso");
// Add options for shared libraries.
if (Args.hasArg(options::OPT_shared)) {
CmdArgs.push_back("-bM:SRE");
CmdArgs.push_back("-bnoentry");
}
// PGO instrumentation generates symbols belonging to special sections, and
// the linker needs to place all symbols in a particular section together in
// memory; the AIX linker does that under an option.
if (Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs,
false) ||
Args.hasFlag(options::OPT_fprofile_generate,
options::OPT_fno_profile_generate, false) ||
Args.hasFlag(options::OPT_fprofile_generate_EQ,
options::OPT_fno_profile_generate, false) ||
Args.hasFlag(options::OPT_fprofile_instr_generate,
options::OPT_fno_profile_instr_generate, false) ||
Args.hasFlag(options::OPT_fprofile_instr_generate_EQ,
options::OPT_fno_profile_instr_generate, false) ||
Args.hasFlag(options::OPT_fcs_profile_generate,
options::OPT_fno_profile_generate, false) ||
Args.hasFlag(options::OPT_fcs_profile_generate_EQ,
options::OPT_fno_profile_generate, false) ||
Args.hasArg(options::OPT_fcreate_profile) ||
Args.hasArg(options::OPT_coverage))
CmdArgs.push_back("-bdbg:namedsects:ss");
// Specify linker output file.
assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
if (Output.isFilename()) {
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
}
// Set linking mode (i.e., 32/64-bit) and the address of
// text and data sections based on arch bit width.
if (IsArch32Bit) {
CmdArgs.push_back("-b32");
CmdArgs.push_back("-bpT:0x10000000");
CmdArgs.push_back("-bpD:0x20000000");
} else {
// Must be 64-bit, otherwise asserted already.
CmdArgs.push_back("-b64");
CmdArgs.push_back("-bpT:0x100000000");
CmdArgs.push_back("-bpD:0x110000000");
}
auto getCrt0Basename = [&Args, IsArch32Bit] {
// Enable gprofiling when "-pg" is specified.
if (Args.hasArg(options::OPT_pg))
return IsArch32Bit ? "gcrt0.o" : "gcrt0_64.o";
// Enable profiling when "-p" is specified.
else if (Args.hasArg(options::OPT_p))
return IsArch32Bit ? "mcrt0.o" : "mcrt0_64.o";
else
return IsArch32Bit ? "crt0.o" : "crt0_64.o";
};
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
options::OPT_shared)) {
CmdArgs.push_back(
Args.MakeArgString(ToolChain.GetFilePath(getCrt0Basename())));
CmdArgs.push_back(Args.MakeArgString(
ToolChain.GetFilePath(IsArch32Bit ? "crti.o" : "crti_64.o")));
}
// Collect all static constructor and destructor functions in both C and CXX
// language link invocations. This has to come before AddLinkerInputs as the
// implied option needs to precede any other '-bcdtors' settings or
// '-bnocdtors' that '-Wl' might forward.
CmdArgs.push_back("-bcdtors:all:0:s");
// Specify linker input file(s).
AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
if (D.isUsingLTO()) {
assert(!Inputs.empty() && "Must have at least one input.");
addLTOOptions(ToolChain, Args, CmdArgs, Output, Inputs[0],
D.getLTOMode() == LTOK_Thin);
}
if (Args.hasArg(options::OPT_shared) && !hasExportListLinkerOpts(CmdArgs)) {
const char *CreateExportListExec = Args.MakeArgString(
path::parent_path(ToolChain.getDriver().ClangExecutable) +
"/llvm-nm");
ArgStringList CreateExportCmdArgs;
std::string CreateExportListPath =
C.getDriver().GetTemporaryPath("CreateExportList", "exp");
const char *ExportList =
C.addTempFile(C.getArgs().MakeArgString(CreateExportListPath));
for (const auto &II : Inputs)
if (II.isFilename())
CreateExportCmdArgs.push_back(II.getFilename());
CreateExportCmdArgs.push_back("--export-symbols");
CreateExportCmdArgs.push_back("-X");
if (IsArch32Bit) {
CreateExportCmdArgs.push_back("32");
} else {
// Must be 64-bit, otherwise asserted already.
CreateExportCmdArgs.push_back("64");
}
auto ExpCommand = std::make_unique<Command>(
JA, *this, ResponseFileSupport::None(), CreateExportListExec,
CreateExportCmdArgs, Inputs, Output);
ExpCommand->setRedirectFiles(
{std::nullopt, std::string(ExportList), std::nullopt});
C.addCommand(std::move(ExpCommand));
CmdArgs.push_back(Args.MakeArgString(llvm::Twine("-bE:") + ExportList));
}
// Add directory to library search path.
Args.AddAllArgs(CmdArgs, options::OPT_L);
ToolChain.AddFilePathLibArgs(Args, CmdArgs);
ToolChain.addProfileRTLibs(Args, CmdArgs);
if (getToolChain().ShouldLinkCXXStdlib(Args))
getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
// Support POSIX threads if "-pthreads" or "-pthread" is present.
if (Args.hasArg(options::OPT_pthreads, options::OPT_pthread))
CmdArgs.push_back("-lpthreads");
if (D.CCCIsCXX())
CmdArgs.push_back("-lm");
CmdArgs.push_back("-lc");
if (Args.hasArg(options::OPT_pg)) {
CmdArgs.push_back(Args.MakeArgString((llvm::Twine("-L") + D.SysRoot) +
"/lib/profiled"));
CmdArgs.push_back(Args.MakeArgString((llvm::Twine("-L") + D.SysRoot) +
"/usr/lib/profiled"));
}
}
const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
Exec, CmdArgs, Inputs, Output));
}
/// AIX - AIX tool chain which can call as(1) and ld(1) directly.
AIX::AIX(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
: ToolChain(D, Triple, Args) {
ParseInlineAsmUsingAsmParser = Args.hasFlag(
options::OPT_fintegrated_as, options::OPT_fno_integrated_as, true);
getLibraryPaths().push_back(getDriver().SysRoot + "/usr/lib");
}
// Returns the effective header sysroot path to use.
// This comes from either -isysroot or --sysroot.
llvm::StringRef
AIX::GetHeaderSysroot(const llvm::opt::ArgList &DriverArgs) const {
if (DriverArgs.hasArg(options::OPT_isysroot))
return DriverArgs.getLastArgValue(options::OPT_isysroot);
if (!getDriver().SysRoot.empty())
return getDriver().SysRoot;
return "/";
}
void AIX::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
// Return if -nostdinc is specified as a driver option.
if (DriverArgs.hasArg(options::OPT_nostdinc))
return;
llvm::StringRef Sysroot = GetHeaderSysroot(DriverArgs);
const Driver &D = getDriver();
if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
SmallString<128> P(D.ResourceDir);
// Add the PowerPC intrinsic headers (<resource>/include/ppc_wrappers)
path::append(P, "include", "ppc_wrappers");
addSystemInclude(DriverArgs, CC1Args, P);
// Add the Clang builtin headers (<resource>/include)
addSystemInclude(DriverArgs, CC1Args, path::parent_path(P.str()));
}
// Return if -nostdlibinc is specified as a driver option.
if (DriverArgs.hasArg(options::OPT_nostdlibinc))
return;
// Add <sysroot>/usr/include.
SmallString<128> UP(Sysroot);
path::append(UP, "/usr/include");
addSystemInclude(DriverArgs, CC1Args, UP.str());
}
void AIX::AddClangCXXStdlibIncludeArgs(
const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const {
if (DriverArgs.hasArg(options::OPT_nostdinc) ||
DriverArgs.hasArg(options::OPT_nostdincxx) ||
DriverArgs.hasArg(options::OPT_nostdlibinc))
return;
switch (GetCXXStdlibType(DriverArgs)) {
case ToolChain::CST_Libstdcxx:
llvm::report_fatal_error(
"picking up libstdc++ headers is unimplemented on AIX");
case ToolChain::CST_Libcxx: {
llvm::StringRef Sysroot = GetHeaderSysroot(DriverArgs);
SmallString<128> PathCPP(Sysroot);
llvm::sys::path::append(PathCPP, "opt/IBM/openxlCSDK", "include", "c++",
"v1");
addSystemInclude(DriverArgs, CC1Args, PathCPP.str());
// Required in order to suppress conflicting C++ overloads in the system
// libc headers that were used by XL C++.
CC1Args.push_back("-D__LIBC_NO_CPP_MATH_OVERLOADS__");
return;
}
}
llvm_unreachable("Unexpected C++ library type; only libc++ is supported.");
}
void AIX::AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
llvm::opt::ArgStringList &CmdArgs) const {
switch (GetCXXStdlibType(Args)) {
case ToolChain::CST_Libstdcxx:
llvm::report_fatal_error("linking libstdc++ unimplemented on AIX");
case ToolChain::CST_Libcxx:
CmdArgs.push_back("-lc++");
if (Args.hasArg(options::OPT_fexperimental_library))
CmdArgs.push_back("-lc++experimental");
CmdArgs.push_back("-lc++abi");
return;
}
llvm_unreachable("Unexpected C++ library type; only libc++ is supported.");
}
void AIX::addProfileRTLibs(const llvm::opt::ArgList &Args,
llvm::opt::ArgStringList &CmdArgs) const {
// Add linker option -u__llvm_profile_runtime to cause runtime
// initialization to occur.
if (needsProfileRT(Args))
CmdArgs.push_back(Args.MakeArgString(
Twine("-u", llvm::getInstrProfRuntimeHookVarName())));
ToolChain::addProfileRTLibs(Args, CmdArgs);
}
ToolChain::CXXStdlibType AIX::GetDefaultCXXStdlibType() const {
return ToolChain::CST_Libcxx;
}
ToolChain::RuntimeLibType AIX::GetDefaultRuntimeLibType() const {
return ToolChain::RLT_CompilerRT;
}
auto AIX::buildAssembler() const -> Tool * { return new aix::Assembler(*this); }
auto AIX::buildLinker() const -> Tool * { return new aix::Linker(*this); }
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