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Driver.cpp
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Driver.cpp
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//===--- Driver.cpp - Clang GCC Compatible Driver -------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Driver/Driver.h"
#include "InputInfo.h"
#include "ToolChains.h"
#include "clang/Basic/Version.h"
#include "clang/Basic/VirtualFileSystem.h"
#include "clang/Config/config.h"
#include "clang/Driver/Action.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Job.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/SanitizerArgs.h"
#include "clang/Driver/Tool.h"
#include "clang/Driver/ToolChain.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/OptSpecifier.h"
#include "llvm/Option/OptTable.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/raw_ostream.h"
#include <map>
#include <memory>
using namespace clang::driver;
using namespace clang;
using namespace llvm::opt;
Driver::Driver(StringRef ClangExecutable, StringRef DefaultTargetTriple,
DiagnosticsEngine &Diags,
IntrusiveRefCntPtr<vfs::FileSystem> VFS)
: Opts(createDriverOptTable()), Diags(Diags), VFS(VFS), Mode(GCCMode),
SaveTemps(SaveTempsNone), LTOMode(LTOK_None),
ClangExecutable(ClangExecutable),
SysRoot(DEFAULT_SYSROOT), UseStdLib(true),
DefaultTargetTriple(DefaultTargetTriple),
DriverTitle("clang LLVM compiler"), CCPrintOptionsFilename(nullptr),
CCPrintHeadersFilename(nullptr), CCLogDiagnosticsFilename(nullptr),
CCCPrintBindings(false), CCPrintHeaders(false), CCLogDiagnostics(false),
CCGenDiagnostics(false), CCCGenericGCCName(""), CheckInputsExist(true),
CCCUsePCH(true), SuppressMissingInputWarning(false) {
// Provide a sane fallback if no VFS is specified.
if (!this->VFS)
this->VFS = vfs::getRealFileSystem();
Name = llvm::sys::path::filename(ClangExecutable);
Dir = llvm::sys::path::parent_path(ClangExecutable);
InstalledDir = Dir; // Provide a sensible default installed dir.
// Compute the path to the resource directory.
StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
SmallString<128> P(Dir);
if (ClangResourceDir != "") {
llvm::sys::path::append(P, ClangResourceDir);
} else {
StringRef ClangLibdirSuffix(CLANG_LIBDIR_SUFFIX);
llvm::sys::path::append(P, "..", Twine("lib") + ClangLibdirSuffix, "clang",
CLANG_VERSION_STRING);
}
ResourceDir = P.str();
}
Driver::~Driver() {
delete Opts;
llvm::DeleteContainerSeconds(ToolChains);
}
void Driver::ParseDriverMode(ArrayRef<const char *> Args) {
const std::string OptName =
getOpts().getOption(options::OPT_driver_mode).getPrefixedName();
for (const char *ArgPtr : Args) {
// Ingore nullptrs, they are response file's EOL markers
if (ArgPtr == nullptr)
continue;
const StringRef Arg = ArgPtr;
if (!Arg.startswith(OptName))
continue;
const StringRef Value = Arg.drop_front(OptName.size());
const unsigned M = llvm::StringSwitch<unsigned>(Value)
.Case("gcc", GCCMode)
.Case("g++", GXXMode)
.Case("cpp", CPPMode)
.Case("cl", CLMode)
.Default(~0U);
if (M != ~0U)
Mode = static_cast<DriverMode>(M);
else
Diag(diag::err_drv_unsupported_option_argument) << OptName << Value;
}
}
InputArgList Driver::ParseArgStrings(ArrayRef<const char *> ArgStrings) {
llvm::PrettyStackTraceString CrashInfo("Command line argument parsing");
unsigned IncludedFlagsBitmask;
unsigned ExcludedFlagsBitmask;
std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
getIncludeExcludeOptionFlagMasks();
unsigned MissingArgIndex, MissingArgCount;
InputArgList Args =
getOpts().ParseArgs(ArgStrings, MissingArgIndex, MissingArgCount,
IncludedFlagsBitmask, ExcludedFlagsBitmask);
// Check for missing argument error.
if (MissingArgCount)
Diag(clang::diag::err_drv_missing_argument)
<< Args.getArgString(MissingArgIndex) << MissingArgCount;
// Check for unsupported options.
for (const Arg *A : Args) {
if (A->getOption().hasFlag(options::Unsupported)) {
Diag(clang::diag::err_drv_unsupported_opt) << A->getAsString(Args);
continue;
}
// Warn about -mcpu= without an argument.
if (A->getOption().matches(options::OPT_mcpu_EQ) && A->containsValue("")) {
Diag(clang::diag::warn_drv_empty_joined_argument) << A->getAsString(Args);
}
}
for (const Arg *A : Args.filtered(options::OPT_UNKNOWN))
Diags.Report(diag::err_drv_unknown_argument) << A->getAsString(Args);
return Args;
}
// Determine which compilation mode we are in. We look for options which
// affect the phase, starting with the earliest phases, and record which
// option we used to determine the final phase.
phases::ID Driver::getFinalPhase(const DerivedArgList &DAL,
Arg **FinalPhaseArg) const {
Arg *PhaseArg = nullptr;
phases::ID FinalPhase;
// -{E,EP,P,M,MM} only run the preprocessor.
if (CCCIsCPP() || (PhaseArg = DAL.getLastArg(options::OPT_E)) ||
(PhaseArg = DAL.getLastArg(options::OPT__SLASH_EP)) ||
(PhaseArg = DAL.getLastArg(options::OPT_M, options::OPT_MM)) ||
(PhaseArg = DAL.getLastArg(options::OPT__SLASH_P))) {
FinalPhase = phases::Preprocess;
// -{fsyntax-only,-analyze,emit-ast} only run up to the compiler.
} else if ((PhaseArg = DAL.getLastArg(options::OPT_fsyntax_only)) ||
(PhaseArg = DAL.getLastArg(options::OPT_module_file_info)) ||
(PhaseArg = DAL.getLastArg(options::OPT_verify_pch)) ||
(PhaseArg = DAL.getLastArg(options::OPT_rewrite_objc)) ||
(PhaseArg = DAL.getLastArg(options::OPT_rewrite_legacy_objc)) ||
(PhaseArg = DAL.getLastArg(options::OPT__migrate)) ||
(PhaseArg = DAL.getLastArg(options::OPT__analyze,
options::OPT__analyze_auto)) ||
(PhaseArg = DAL.getLastArg(options::OPT_emit_ast))) {
FinalPhase = phases::Compile;
// -S only runs up to the backend.
} else if ((PhaseArg = DAL.getLastArg(options::OPT_S))) {
FinalPhase = phases::Backend;
// -c compilation only runs up to the assembler.
} else if ((PhaseArg = DAL.getLastArg(options::OPT_c))) {
FinalPhase = phases::Assemble;
// Otherwise do everything.
} else
FinalPhase = phases::Link;
if (FinalPhaseArg)
*FinalPhaseArg = PhaseArg;
return FinalPhase;
}
static Arg *MakeInputArg(DerivedArgList &Args, OptTable *Opts,
StringRef Value) {
Arg *A = new Arg(Opts->getOption(options::OPT_INPUT), Value,
Args.getBaseArgs().MakeIndex(Value), Value.data());
Args.AddSynthesizedArg(A);
A->claim();
return A;
}
DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const {
DerivedArgList *DAL = new DerivedArgList(Args);
bool HasNostdlib = Args.hasArg(options::OPT_nostdlib);
bool HasNodefaultlib = Args.hasArg(options::OPT_nodefaultlibs);
for (Arg *A : Args) {
// Unfortunately, we have to parse some forwarding options (-Xassembler,
// -Xlinker, -Xpreprocessor) because we either integrate their functionality
// (assembler and preprocessor), or bypass a previous driver ('collect2').
// Rewrite linker options, to replace --no-demangle with a custom internal
// option.
if ((A->getOption().matches(options::OPT_Wl_COMMA) ||
A->getOption().matches(options::OPT_Xlinker)) &&
A->containsValue("--no-demangle")) {
// Add the rewritten no-demangle argument.
DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_Xlinker__no_demangle));
// Add the remaining values as Xlinker arguments.
for (StringRef Val : A->getValues())
if (Val != "--no-demangle")
DAL->AddSeparateArg(A, Opts->getOption(options::OPT_Xlinker), Val);
continue;
}
// Rewrite preprocessor options, to replace -Wp,-MD,FOO which is used by
// some build systems. We don't try to be complete here because we don't
// care to encourage this usage model.
if (A->getOption().matches(options::OPT_Wp_COMMA) &&
(A->getValue(0) == StringRef("-MD") ||
A->getValue(0) == StringRef("-MMD"))) {
// Rewrite to -MD/-MMD along with -MF.
if (A->getValue(0) == StringRef("-MD"))
DAL->AddFlagArg(A, Opts->getOption(options::OPT_MD));
else
DAL->AddFlagArg(A, Opts->getOption(options::OPT_MMD));
if (A->getNumValues() == 2)
DAL->AddSeparateArg(A, Opts->getOption(options::OPT_MF),
A->getValue(1));
continue;
}
// Rewrite reserved library names.
if (A->getOption().matches(options::OPT_l)) {
StringRef Value = A->getValue();
// Rewrite unless -nostdlib is present.
if (!HasNostdlib && !HasNodefaultlib && Value == "stdc++") {
DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_reserved_lib_stdcxx));
continue;
}
// Rewrite unconditionally.
if (Value == "cc_kext") {
DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_reserved_lib_cckext));
continue;
}
}
// Pick up inputs via the -- option.
if (A->getOption().matches(options::OPT__DASH_DASH)) {
A->claim();
for (StringRef Val : A->getValues())
DAL->append(MakeInputArg(*DAL, Opts, Val));
continue;
}
DAL->append(A);
}
// Add a default value of -mlinker-version=, if one was given and the user
// didn't specify one.
#if defined(HOST_LINK_VERSION)
if (!Args.hasArg(options::OPT_mlinker_version_EQ) &&
strlen(HOST_LINK_VERSION) > 0) {
DAL->AddJoinedArg(0, Opts->getOption(options::OPT_mlinker_version_EQ),
HOST_LINK_VERSION);
DAL->getLastArg(options::OPT_mlinker_version_EQ)->claim();
}
#endif
return DAL;
}
/// \brief Compute target triple from args.
///
/// This routine provides the logic to compute a target triple from various
/// args passed to the driver and the default triple string.
static llvm::Triple computeTargetTriple(StringRef DefaultTargetTriple,
const ArgList &Args,
StringRef DarwinArchName = "") {
// FIXME: Already done in Compilation *Driver::BuildCompilation
if (const Arg *A = Args.getLastArg(options::OPT_target))
DefaultTargetTriple = A->getValue();
llvm::Triple Target(llvm::Triple::normalize(DefaultTargetTriple));
// Handle Apple-specific options available here.
if (Target.isOSBinFormatMachO()) {
// If an explict Darwin arch name is given, that trumps all.
if (!DarwinArchName.empty()) {
tools::darwin::setTripleTypeForMachOArchName(Target, DarwinArchName);
return Target;
}
// Handle the Darwin '-arch' flag.
if (Arg *A = Args.getLastArg(options::OPT_arch)) {
StringRef ArchName = A->getValue();
tools::darwin::setTripleTypeForMachOArchName(Target, ArchName);
}
}
// Handle pseudo-target flags '-mlittle-endian'/'-EL' and
// '-mbig-endian'/'-EB'.
if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
options::OPT_mbig_endian)) {
if (A->getOption().matches(options::OPT_mlittle_endian)) {
llvm::Triple LE = Target.getLittleEndianArchVariant();
if (LE.getArch() != llvm::Triple::UnknownArch)
Target = std::move(LE);
} else {
llvm::Triple BE = Target.getBigEndianArchVariant();
if (BE.getArch() != llvm::Triple::UnknownArch)
Target = std::move(BE);
}
}
// Skip further flag support on OSes which don't support '-m32' or '-m64'.
if (Target.getArch() == llvm::Triple::tce ||
Target.getOS() == llvm::Triple::Minix)
return Target;
// Handle pseudo-target flags '-m64', '-mx32', '-m32' and '-m16'.
if (Arg *A = Args.getLastArg(options::OPT_m64, options::OPT_mx32,
options::OPT_m32, options::OPT_m16)) {
llvm::Triple::ArchType AT = llvm::Triple::UnknownArch;
if (A->getOption().matches(options::OPT_m64)) {
AT = Target.get64BitArchVariant().getArch();
if (Target.getEnvironment() == llvm::Triple::GNUX32)
Target.setEnvironment(llvm::Triple::GNU);
} else if (A->getOption().matches(options::OPT_mx32) &&
Target.get64BitArchVariant().getArch() == llvm::Triple::x86_64) {
AT = llvm::Triple::x86_64;
Target.setEnvironment(llvm::Triple::GNUX32);
} else if (A->getOption().matches(options::OPT_m32)) {
AT = Target.get32BitArchVariant().getArch();
if (Target.getEnvironment() == llvm::Triple::GNUX32)
Target.setEnvironment(llvm::Triple::GNU);
} else if (A->getOption().matches(options::OPT_m16) &&
Target.get32BitArchVariant().getArch() == llvm::Triple::x86) {
AT = llvm::Triple::x86;
Target.setEnvironment(llvm::Triple::CODE16);
}
if (AT != llvm::Triple::UnknownArch && AT != Target.getArch())
Target.setArch(AT);
}
return Target;
}
// \brief Parse the LTO options and record the type of LTO compilation
// based on which -f(no-)?lto(=.*)? option occurs last.
void Driver::setLTOMode(const llvm::opt::ArgList &Args) {
LTOMode = LTOK_None;
if (!Args.hasFlag(options::OPT_flto, options::OPT_flto_EQ,
options::OPT_fno_lto, false))
return;
StringRef LTOName("full");
const Arg *A = Args.getLastArg(options::OPT_flto_EQ);
if (A)
LTOName = A->getValue();
LTOMode = llvm::StringSwitch<LTOKind>(LTOName)
.Case("full", LTOK_Full)
.Case("thin", LTOK_Thin)
.Default(LTOK_Unknown);
if (LTOMode == LTOK_Unknown) {
assert(A);
Diag(diag::err_drv_unsupported_option_argument) << A->getOption().getName()
<< A->getValue();
}
}
Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
llvm::PrettyStackTraceString CrashInfo("Compilation construction");
// FIXME: Handle environment options which affect driver behavior, somewhere
// (client?). GCC_EXEC_PREFIX, LPATH, CC_PRINT_OPTIONS.
if (char *env = ::getenv("COMPILER_PATH")) {
StringRef CompilerPath = env;
while (!CompilerPath.empty()) {
std::pair<StringRef, StringRef> Split =
CompilerPath.split(llvm::sys::EnvPathSeparator);
PrefixDirs.push_back(Split.first);
CompilerPath = Split.second;
}
}
// We look for the driver mode option early, because the mode can affect
// how other options are parsed.
ParseDriverMode(ArgList.slice(1));
// FIXME: What are we going to do with -V and -b?
// FIXME: This stuff needs to go into the Compilation, not the driver.
bool CCCPrintPhases;
InputArgList Args = ParseArgStrings(ArgList.slice(1));
// Silence driver warnings if requested
Diags.setIgnoreAllWarnings(Args.hasArg(options::OPT_w));
// -no-canonical-prefixes is used very early in main.
Args.ClaimAllArgs(options::OPT_no_canonical_prefixes);
// Ignore -pipe.
Args.ClaimAllArgs(options::OPT_pipe);
// Extract -ccc args.
//
// FIXME: We need to figure out where this behavior should live. Most of it
// should be outside in the client; the parts that aren't should have proper
// options, either by introducing new ones or by overloading gcc ones like -V
// or -b.
CCCPrintPhases = Args.hasArg(options::OPT_ccc_print_phases);
CCCPrintBindings = Args.hasArg(options::OPT_ccc_print_bindings);
if (const Arg *A = Args.getLastArg(options::OPT_ccc_gcc_name))
CCCGenericGCCName = A->getValue();
CCCUsePCH =
Args.hasFlag(options::OPT_ccc_pch_is_pch, options::OPT_ccc_pch_is_pth);
// FIXME: DefaultTargetTriple is used by the target-prefixed calls to as/ld
// and getToolChain is const.
if (IsCLMode()) {
// clang-cl targets MSVC-style Win32.
llvm::Triple T(DefaultTargetTriple);
T.setOS(llvm::Triple::Win32);
T.setVendor(llvm::Triple::PC);
T.setEnvironment(llvm::Triple::MSVC);
DefaultTargetTriple = T.str();
}
if (const Arg *A = Args.getLastArg(options::OPT_target))
DefaultTargetTriple = A->getValue();
if (const Arg *A = Args.getLastArg(options::OPT_ccc_install_dir))
Dir = InstalledDir = A->getValue();
for (const Arg *A : Args.filtered(options::OPT_B)) {
A->claim();
PrefixDirs.push_back(A->getValue(0));
}
if (const Arg *A = Args.getLastArg(options::OPT__sysroot_EQ))
SysRoot = A->getValue();
if (const Arg *A = Args.getLastArg(options::OPT__dyld_prefix_EQ))
DyldPrefix = A->getValue();
if (Args.hasArg(options::OPT_nostdlib))
UseStdLib = false;
if (const Arg *A = Args.getLastArg(options::OPT_resource_dir))
ResourceDir = A->getValue();
if (const Arg *A = Args.getLastArg(options::OPT_save_temps_EQ)) {
SaveTemps = llvm::StringSwitch<SaveTempsMode>(A->getValue())
.Case("cwd", SaveTempsCwd)
.Case("obj", SaveTempsObj)
.Default(SaveTempsCwd);
}
setLTOMode(Args);
std::unique_ptr<llvm::opt::InputArgList> UArgs =
llvm::make_unique<InputArgList>(std::move(Args));
// Perform the default argument translations.
DerivedArgList *TranslatedArgs = TranslateInputArgs(*UArgs);
// Owned by the host.
const ToolChain &TC =
getToolChain(*UArgs, computeTargetTriple(DefaultTargetTriple, *UArgs));
// The compilation takes ownership of Args.
Compilation *C = new Compilation(*this, TC, UArgs.release(), TranslatedArgs);
C->setCudaDeviceToolChain(
&getToolChain(C->getArgs(), llvm::Triple(TC.getTriple().isArch64Bit()
? "nvptx64-nvidia-cuda"
: "nvptx-nvidia-cuda")));
if (!HandleImmediateArgs(*C))
return C;
// Construct the list of inputs.
InputList Inputs;
BuildInputs(C->getDefaultToolChain(), *TranslatedArgs, Inputs);
// Construct the list of abstract actions to perform for this compilation. On
// MachO targets this uses the driver-driver and universal actions.
if (TC.getTriple().isOSBinFormatMachO())
BuildUniversalActions(*C, C->getDefaultToolChain(), Inputs);
else
BuildActions(*C, C->getDefaultToolChain(), C->getArgs(), Inputs,
C->getActions());
if (CCCPrintPhases) {
PrintActions(*C);
return C;
}
BuildJobs(*C);
return C;
}
static void printArgList(raw_ostream &OS, const llvm::opt::ArgList &Args) {
llvm::opt::ArgStringList ASL;
for (const auto *A : Args)
A->render(Args, ASL);
for (auto I = ASL.begin(), E = ASL.end(); I != E; ++I) {
if (I != ASL.begin())
OS << ' ';
Command::printArg(OS, *I, true);
}
OS << '\n';
}
// When clang crashes, produce diagnostic information including the fully
// preprocessed source file(s). Request that the developer attach the
// diagnostic information to a bug report.
void Driver::generateCompilationDiagnostics(Compilation &C,
const Command &FailingCommand) {
if (C.getArgs().hasArg(options::OPT_fno_crash_diagnostics))
return;
// Don't try to generate diagnostics for link or dsymutil jobs.
if (FailingCommand.getCreator().isLinkJob() ||
FailingCommand.getCreator().isDsymutilJob())
return;
// Print the version of the compiler.
PrintVersion(C, llvm::errs());
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "PLEASE submit a bug report to " BUG_REPORT_URL " and include the "
"crash backtrace, preprocessed source, and associated run script.";
// Suppress driver output and emit preprocessor output to temp file.
Mode = CPPMode;
CCGenDiagnostics = true;
// Save the original job command(s).
Command Cmd = FailingCommand;
// Keep track of whether we produce any errors while trying to produce
// preprocessed sources.
DiagnosticErrorTrap Trap(Diags);
// Suppress tool output.
C.initCompilationForDiagnostics();
// Construct the list of inputs.
InputList Inputs;
BuildInputs(C.getDefaultToolChain(), C.getArgs(), Inputs);
for (InputList::iterator it = Inputs.begin(), ie = Inputs.end(); it != ie;) {
bool IgnoreInput = false;
// Ignore input from stdin or any inputs that cannot be preprocessed.
// Check type first as not all linker inputs have a value.
if (types::getPreprocessedType(it->first) == types::TY_INVALID) {
IgnoreInput = true;
} else if (!strcmp(it->second->getValue(), "-")) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s) - "
"ignoring input from stdin.";
IgnoreInput = true;
}
if (IgnoreInput) {
it = Inputs.erase(it);
ie = Inputs.end();
} else {
++it;
}
}
if (Inputs.empty()) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s) - "
"no preprocessable inputs.";
return;
}
// Don't attempt to generate preprocessed files if multiple -arch options are
// used, unless they're all duplicates.
llvm::StringSet<> ArchNames;
for (const Arg *A : C.getArgs()) {
if (A->getOption().matches(options::OPT_arch)) {
StringRef ArchName = A->getValue();
ArchNames.insert(ArchName);
}
}
if (ArchNames.size() > 1) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s) - cannot generate "
"preprocessed source with multiple -arch options.";
return;
}
// Construct the list of abstract actions to perform for this compilation. On
// Darwin OSes this uses the driver-driver and builds universal actions.
const ToolChain &TC = C.getDefaultToolChain();
if (TC.getTriple().isOSBinFormatMachO())
BuildUniversalActions(C, TC, Inputs);
else
BuildActions(C, TC, C.getArgs(), Inputs, C.getActions());
BuildJobs(C);
// If there were errors building the compilation, quit now.
if (Trap.hasErrorOccurred()) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s).";
return;
}
// Generate preprocessed output.
SmallVector<std::pair<int, const Command *>, 4> FailingCommands;
C.ExecuteJobs(C.getJobs(), FailingCommands);
// If any of the preprocessing commands failed, clean up and exit.
if (!FailingCommands.empty()) {
if (!isSaveTempsEnabled())
C.CleanupFileList(C.getTempFiles(), true);
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s).";
return;
}
const ArgStringList &TempFiles = C.getTempFiles();
if (TempFiles.empty()) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating preprocessed source(s).";
return;
}
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "\n********************\n\n"
"PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:\n"
"Preprocessed source(s) and associated run script(s) are located at:";
SmallString<128> VFS;
for (const char *TempFile : TempFiles) {
Diag(clang::diag::note_drv_command_failed_diag_msg) << TempFile;
if (StringRef(TempFile).endswith(".cache")) {
// In some cases (modules) we'll dump extra data to help with reproducing
// the crash into a directory next to the output.
VFS = llvm::sys::path::filename(TempFile);
llvm::sys::path::append(VFS, "vfs", "vfs.yaml");
}
}
// Assume associated files are based off of the first temporary file.
CrashReportInfo CrashInfo(TempFiles[0], VFS);
std::string Script = CrashInfo.Filename.rsplit('.').first.str() + ".sh";
std::error_code EC;
llvm::raw_fd_ostream ScriptOS(Script, EC, llvm::sys::fs::F_Excl);
if (EC) {
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "Error generating run script: " + Script + " " + EC.message();
} else {
ScriptOS << "# Crash reproducer for " << getClangFullVersion() << "\n"
<< "# Driver args: ";
printArgList(ScriptOS, C.getInputArgs());
ScriptOS << "# Original command: ";
Cmd.Print(ScriptOS, "\n", /*Quote=*/true);
Cmd.Print(ScriptOS, "\n", /*Quote=*/true, &CrashInfo);
Diag(clang::diag::note_drv_command_failed_diag_msg) << Script;
}
for (const auto &A : C.getArgs().filtered(options::OPT_frewrite_map_file,
options::OPT_frewrite_map_file_EQ))
Diag(clang::diag::note_drv_command_failed_diag_msg) << A->getValue();
Diag(clang::diag::note_drv_command_failed_diag_msg)
<< "\n\n********************";
}
void Driver::setUpResponseFiles(Compilation &C, Command &Cmd) {
// Since commandLineFitsWithinSystemLimits() may underestimate system's capacity
// if the tool does not support response files, there is a chance/ that things
// will just work without a response file, so we silently just skip it.
if (Cmd.getCreator().getResponseFilesSupport() == Tool::RF_None ||
llvm::sys::commandLineFitsWithinSystemLimits(Cmd.getExecutable(), Cmd.getArguments()))
return;
std::string TmpName = GetTemporaryPath("response", "txt");
Cmd.setResponseFile(
C.addTempFile(C.getArgs().MakeArgString(TmpName.c_str())));
}
int Driver::ExecuteCompilation(
Compilation &C,
SmallVectorImpl<std::pair<int, const Command *>> &FailingCommands) {
// Just print if -### was present.
if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
C.getJobs().Print(llvm::errs(), "\n", true);
return 0;
}
// If there were errors building the compilation, quit now.
if (Diags.hasErrorOccurred())
return 1;
// Set up response file names for each command, if necessary
for (auto &Job : C.getJobs())
setUpResponseFiles(C, Job);
C.ExecuteJobs(C.getJobs(), FailingCommands);
// Remove temp files.
C.CleanupFileList(C.getTempFiles());
// If the command succeeded, we are done.
if (FailingCommands.empty())
return 0;
// Otherwise, remove result files and print extra information about abnormal
// failures.
for (const auto &CmdPair : FailingCommands) {
int Res = CmdPair.first;
const Command *FailingCommand = CmdPair.second;
// Remove result files if we're not saving temps.
if (!isSaveTempsEnabled()) {
const JobAction *JA = cast<JobAction>(&FailingCommand->getSource());
C.CleanupFileMap(C.getResultFiles(), JA, true);
// Failure result files are valid unless we crashed.
if (Res < 0)
C.CleanupFileMap(C.getFailureResultFiles(), JA, true);
}
// Print extra information about abnormal failures, if possible.
//
// This is ad-hoc, but we don't want to be excessively noisy. If the result
// status was 1, assume the command failed normally. In particular, if it
// was the compiler then assume it gave a reasonable error code. Failures
// in other tools are less common, and they generally have worse
// diagnostics, so always print the diagnostic there.
const Tool &FailingTool = FailingCommand->getCreator();
if (!FailingCommand->getCreator().hasGoodDiagnostics() || Res != 1) {
// FIXME: See FIXME above regarding result code interpretation.
if (Res < 0)
Diag(clang::diag::err_drv_command_signalled)
<< FailingTool.getShortName();
else
Diag(clang::diag::err_drv_command_failed) << FailingTool.getShortName()
<< Res;
}
}
return 0;
}
void Driver::PrintHelp(bool ShowHidden) const {
unsigned IncludedFlagsBitmask;
unsigned ExcludedFlagsBitmask;
std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
getIncludeExcludeOptionFlagMasks();
ExcludedFlagsBitmask |= options::NoDriverOption;
if (!ShowHidden)
ExcludedFlagsBitmask |= HelpHidden;
getOpts().PrintHelp(llvm::outs(), Name.c_str(), DriverTitle.c_str(),
IncludedFlagsBitmask, ExcludedFlagsBitmask);
}
void Driver::PrintVersion(const Compilation &C, raw_ostream &OS) const {
// FIXME: The following handlers should use a callback mechanism, we don't
// know what the client would like to do.
OS << getClangFullVersion() << '\n';
const ToolChain &TC = C.getDefaultToolChain();
OS << "Target: " << TC.getTripleString() << '\n';
// Print the threading model.
if (Arg *A = C.getArgs().getLastArg(options::OPT_mthread_model)) {
// Don't print if the ToolChain would have barfed on it already
if (TC.isThreadModelSupported(A->getValue()))
OS << "Thread model: " << A->getValue();
} else
OS << "Thread model: " << TC.getThreadModel();
OS << '\n';
// Print out the install directory.
OS << "InstalledDir: " << InstalledDir << '\n';
}
/// PrintDiagnosticCategories - Implement the --print-diagnostic-categories
/// option.
static void PrintDiagnosticCategories(raw_ostream &OS) {
// Skip the empty category.
for (unsigned i = 1, max = DiagnosticIDs::getNumberOfCategories(); i != max;
++i)
OS << i << ',' << DiagnosticIDs::getCategoryNameFromID(i) << '\n';
}
bool Driver::HandleImmediateArgs(const Compilation &C) {
// The order these options are handled in gcc is all over the place, but we
// don't expect inconsistencies w.r.t. that to matter in practice.
if (C.getArgs().hasArg(options::OPT_dumpmachine)) {
llvm::outs() << C.getDefaultToolChain().getTripleString() << '\n';
return false;
}
if (C.getArgs().hasArg(options::OPT_dumpversion)) {
// Since -dumpversion is only implemented for pedantic GCC compatibility, we
// return an answer which matches our definition of __VERSION__.
//
// If we want to return a more correct answer some day, then we should
// introduce a non-pedantically GCC compatible mode to Clang in which we
// provide sensible definitions for -dumpversion, __VERSION__, etc.
llvm::outs() << "4.2.1\n";
return false;
}
if (C.getArgs().hasArg(options::OPT__print_diagnostic_categories)) {
PrintDiagnosticCategories(llvm::outs());
return false;
}
if (C.getArgs().hasArg(options::OPT_help) ||
C.getArgs().hasArg(options::OPT__help_hidden)) {
PrintHelp(C.getArgs().hasArg(options::OPT__help_hidden));
return false;
}
if (C.getArgs().hasArg(options::OPT__version)) {
// Follow gcc behavior and use stdout for --version and stderr for -v.
PrintVersion(C, llvm::outs());
return false;
}
if (C.getArgs().hasArg(options::OPT_v) ||
C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
PrintVersion(C, llvm::errs());
SuppressMissingInputWarning = true;
}
const ToolChain &TC = C.getDefaultToolChain();
if (C.getArgs().hasArg(options::OPT_v))
TC.printVerboseInfo(llvm::errs());
if (C.getArgs().hasArg(options::OPT_print_search_dirs)) {
llvm::outs() << "programs: =";
bool separator = false;
for (const std::string &Path : TC.getProgramPaths()) {
if (separator)
llvm::outs() << ':';
llvm::outs() << Path;
separator = true;
}
llvm::outs() << "\n";
llvm::outs() << "libraries: =" << ResourceDir;
StringRef sysroot = C.getSysRoot();
for (const std::string &Path : TC.getFilePaths()) {
// Always print a separator. ResourceDir was the first item shown.
llvm::outs() << ':';
// Interpretation of leading '=' is needed only for NetBSD.
if (Path[0] == '=')
llvm::outs() << sysroot << Path.substr(1);
else
llvm::outs() << Path;
}
llvm::outs() << "\n";
return false;
}
// FIXME: The following handlers should use a callback mechanism, we don't
// know what the client would like to do.
if (Arg *A = C.getArgs().getLastArg(options::OPT_print_file_name_EQ)) {
llvm::outs() << GetFilePath(A->getValue(), TC) << "\n";
return false;
}
if (Arg *A = C.getArgs().getLastArg(options::OPT_print_prog_name_EQ)) {
llvm::outs() << GetProgramPath(A->getValue(), TC) << "\n";
return false;
}
if (C.getArgs().hasArg(options::OPT_print_libgcc_file_name)) {
llvm::outs() << GetFilePath("libgcc.a", TC) << "\n";
return false;
}
if (C.getArgs().hasArg(options::OPT_print_multi_lib)) {
for (const Multilib &Multilib : TC.getMultilibs())
llvm::outs() << Multilib << "\n";
return false;
}
if (C.getArgs().hasArg(options::OPT_print_multi_directory)) {
for (const Multilib &Multilib : TC.getMultilibs()) {
if (Multilib.gccSuffix().empty())
llvm::outs() << ".\n";
else {
StringRef Suffix(Multilib.gccSuffix());
assert(Suffix.front() == '/');
llvm::outs() << Suffix.substr(1) << "\n";
}
}
return false;
}
return true;
}
// Display an action graph human-readably. Action A is the "sink" node
// and latest-occuring action. Traversal is in pre-order, visiting the
// inputs to each action before printing the action itself.
static unsigned PrintActions1(const Compilation &C, Action *A,
std::map<Action *, unsigned> &Ids) {
if (Ids.count(A)) // A was already visited.
return Ids[A];
std::string str;
llvm::raw_string_ostream os(str);
os << Action::getClassName(A->getKind()) << ", ";
if (InputAction *IA = dyn_cast<InputAction>(A)) {
os << "\"" << IA->getInputArg().getValue() << "\"";
} else if (BindArchAction *BIA = dyn_cast<BindArchAction>(A)) {
os << '"' << BIA->getArchName() << '"' << ", {"
<< PrintActions1(C, *BIA->begin(), Ids) << "}";
} else if (CudaDeviceAction *CDA = dyn_cast<CudaDeviceAction>(A)) {
os << '"' << CDA->getGpuArchName() << '"' << ", {"
<< PrintActions1(C, *CDA->begin(), Ids) << "}";
} else {
const ActionList *AL;
if (CudaHostAction *CHA = dyn_cast<CudaHostAction>(A)) {
os << "{" << PrintActions1(C, *CHA->begin(), Ids) << "}"
<< ", gpu binaries ";
AL = &CHA->getDeviceActions();
} else
AL = &A->getInputs();
if (AL->size()) {
const char *Prefix = "{";
for (Action *PreRequisite : *AL) {
os << Prefix << PrintActions1(C, PreRequisite, Ids);
Prefix = ", ";
}
os << "}";
} else
os << "{}";
}
unsigned Id = Ids.size();
Ids[A] = Id;
llvm::errs() << Id << ": " << os.str() << ", "
<< types::getTypeName(A->getType()) << "\n";
return Id;
}
// Print the action graphs in a compilation C.
// For example "clang -c file1.c file2.c" is composed of two subgraphs.
void Driver::PrintActions(const Compilation &C) const {
std::map<Action *, unsigned> Ids;
for (Action *A : C.getActions())
PrintActions1(C, A, Ids);
}
/// \brief Check whether the given input tree contains any compilation or
/// assembly actions.
static bool ContainsCompileOrAssembleAction(const Action *A) {
if (isa<CompileJobAction>(A) || isa<BackendJobAction>(A) ||
isa<AssembleJobAction>(A))
return true;
for (const Action *Input : *A)
if (ContainsCompileOrAssembleAction(Input))
return true;