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//===--- Compilation.cpp - Compilation Task Implementation ----------------===//
// The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Action.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/ToolChain.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/raw_ostream.h"
using namespace clang::driver;
using namespace clang;
using namespace llvm::opt;
Compilation::Compilation(const Driver &D, const ToolChain &_DefaultToolChain,
InputArgList *_Args, DerivedArgList *_TranslatedArgs,
bool ContainsError)
: TheDriver(D), DefaultToolChain(_DefaultToolChain), ActiveOffloadMask(0u),
Args(_Args), TranslatedArgs(_TranslatedArgs), ForDiagnostics(false),
ContainsError(ContainsError) {
// The offloading host toolchain is the default toolchain.
std::make_pair(Action::OFK_Host, &DefaultToolChain));
Compilation::~Compilation() {
delete TranslatedArgs;
delete Args;
// Free any derived arg lists.
for (auto Arg : TCArgs)
if (Arg.second != TranslatedArgs)
delete Arg.second;
const DerivedArgList &
Compilation::getArgsForToolChain(const ToolChain *TC, StringRef BoundArch,
Action::OffloadKind DeviceOffloadKind) {
if (!TC)
TC = &DefaultToolChain;
DerivedArgList *&Entry = TCArgs[{TC, BoundArch, DeviceOffloadKind}];
if (!Entry) {
SmallVector<Arg *, 4> AllocatedArgs;
DerivedArgList *OpenMPArgs = nullptr;
// Translate OpenMP toolchain arguments provided via the -Xopenmp-target flags.
if (DeviceOffloadKind == Action::OFK_OpenMP) {
const ToolChain *HostTC = getSingleOffloadToolChain<Action::OFK_Host>();
bool SameTripleAsHost = (TC->getTriple() == HostTC->getTriple());
OpenMPArgs = TC->TranslateOpenMPTargetArgs(
*TranslatedArgs, SameTripleAsHost, AllocatedArgs);
if (!OpenMPArgs) {
Entry = TC->TranslateArgs(*TranslatedArgs, BoundArch, DeviceOffloadKind);
if (!Entry)
Entry = TranslatedArgs;
} else {
Entry = TC->TranslateArgs(*OpenMPArgs, BoundArch, DeviceOffloadKind);
if (!Entry)
Entry = OpenMPArgs;
delete OpenMPArgs;
// Add allocated arguments to the final DAL.
for (auto ArgPtr : AllocatedArgs) {
return *Entry;
bool Compilation::CleanupFile(const char *File, bool IssueErrors) const {
// FIXME: Why are we trying to remove files that we have not created? For
// example we should only try to remove a temporary assembly file if
// "clang -cc1" succeed in writing it. Was this a workaround for when
// clang was writing directly to a .s file and sometimes leaving it behind
// during a failure?
// FIXME: If this is necessary, we can still try to split
// llvm::sys::fs::remove into a removeFile and a removeDir and avoid the
// duplicated stat from is_regular_file.
// Don't try to remove files which we don't have write access to (but may be
// able to remove), or non-regular files. Underlying tools may have
// intentionally not overwritten them.
if (!llvm::sys::fs::can_write(File) || !llvm::sys::fs::is_regular_file(File))
return true;
if (std::error_code EC = llvm::sys::fs::remove(File)) {
// Failure is only failure if the file exists and is "regular". We checked
// for it being regular before, and llvm::sys::fs::remove ignores ENOENT,
// so we don't need to check again.
if (IssueErrors)
<< EC.message();
return false;
return true;
bool Compilation::CleanupFileList(const ArgStringList &Files,
bool IssueErrors) const {
bool Success = true;
for (ArgStringList::const_iterator
it = Files.begin(), ie = Files.end(); it != ie; ++it)
Success &= CleanupFile(*it, IssueErrors);
return Success;
bool Compilation::CleanupFileMap(const ArgStringMap &Files,
const JobAction *JA,
bool IssueErrors) const {
bool Success = true;
for (ArgStringMap::const_iterator
it = Files.begin(), ie = Files.end(); it != ie; ++it) {
// If specified, only delete the files associated with the JobAction.
// Otherwise, delete all files in the map.
if (JA && it->first != JA)
Success &= CleanupFile(it->second, IssueErrors);
return Success;
int Compilation::ExecuteCommand(const Command &C,
const Command *&FailingCommand) const {
if ((getDriver().CCPrintOptions ||
getArgs().hasArg(options::OPT_v)) && !getDriver().CCGenDiagnostics) {
raw_ostream *OS = &llvm::errs();
// Follow gcc implementation of CC_PRINT_OPTIONS; we could also cache the
// output stream.
if (getDriver().CCPrintOptions && getDriver().CCPrintOptionsFilename) {
std::error_code EC;
OS = new llvm::raw_fd_ostream(getDriver().CCPrintOptionsFilename, EC,
llvm::sys::fs::F_Append |
if (EC) {
<< EC.message();
FailingCommand = &C;
delete OS;
return 1;
if (getDriver().CCPrintOptions)
*OS << "[Logging clang options]";
C.Print(*OS, "\n", /*Quote=*/getDriver().CCPrintOptions);
if (OS != &llvm::errs())
delete OS;
std::string Error;
bool ExecutionFailed;
int Res = C.Execute(Redirects, &Error, &ExecutionFailed);
if (!Error.empty()) {
assert(Res && "Error string set with 0 result code!");
getDriver().Diag(clang::diag::err_drv_command_failure) << Error;
if (Res)
FailingCommand = &C;
return ExecutionFailed ? 1 : Res;
using FailingCommandList = SmallVectorImpl<std::pair<int, const Command *>>;
static bool ActionFailed(const Action *A,
const FailingCommandList &FailingCommands) {
if (FailingCommands.empty())
return false;
// CUDA can have the same input source code compiled multiple times so do not
// compiled again if there are already failures. It is OK to abort the CUDA
// pipeline on errors.
if (A->isOffloading(Action::OFK_Cuda))
return true;
for (const auto &CI : FailingCommands)
if (A == &(CI.second->getSource()))
return true;
for (const Action *AI : A->inputs())
if (ActionFailed(AI, FailingCommands))
return true;
return false;
static bool InputsOk(const Command &C,
const FailingCommandList &FailingCommands) {
return !ActionFailed(&C.getSource(), FailingCommands);
void Compilation::ExecuteJobs(const JobList &Jobs,
FailingCommandList &FailingCommands) const {
// According to UNIX standard, driver need to continue compiling all the
// inputs on the command line even one of them failed.
// In all but CLMode, execute all the jobs unless the necessary inputs for the
// job is missing due to previous failures.
for (const auto &Job : Jobs) {
if (!InputsOk(Job, FailingCommands))
const Command *FailingCommand = nullptr;
if (int Res = ExecuteCommand(Job, FailingCommand)) {
FailingCommands.push_back(std::make_pair(Res, FailingCommand));
// Bail as soon as one command fails in cl driver mode.
if (TheDriver.IsCLMode())
void Compilation::initCompilationForDiagnostics() {
ForDiagnostics = true;
// Free actions and jobs.
// Clear temporary/results file lists.
// Remove any user specified output. Claim any unclaimed arguments, so as
// to avoid emitting warnings about unused args.
OptSpecifier OutputOpts[] = { options::OPT_o, options::OPT_MD,
options::OPT_MMD };
for (unsigned i = 0, e = llvm::array_lengthof(OutputOpts); i != e; ++i) {
if (TranslatedArgs->hasArg(OutputOpts[i]))
// Redirect stdout/stderr to /dev/null.
Redirects = {None, {""}, {""}};
StringRef Compilation::getSysRoot() const {
return getDriver().SysRoot;
void Compilation::Redirect(ArrayRef<Optional<StringRef>> Redirects) {
this->Redirects = Redirects;