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llvm-project/clang/lib/Driver/Compilation.cpp

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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/ADT/StringSwitch.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/raw_ostream.h"
#include <errno.h>
#include <sys/stat.h>
using namespace clang::driver;
using namespace clang;
using namespace llvm::opt;
Compilation::Compilation(const Driver &D, const ToolChain &_DefaultToolChain,
InputArgList *_Args, DerivedArgList *_TranslatedArgs)
: TheDriver(D), DefaultToolChain(_DefaultToolChain), Args(_Args),
TranslatedArgs(_TranslatedArgs), Redirects(0) {
}
Compilation::~Compilation() {
delete TranslatedArgs;
delete Args;
// Free any derived arg lists.
for (llvm::DenseMap<std::pair<const ToolChain*, const char*>,
DerivedArgList*>::iterator it = TCArgs.begin(),
ie = TCArgs.end(); it != ie; ++it)
if (it->second != TranslatedArgs)
delete it->second;
// Free the actions, if built.
for (ActionList::iterator it = Actions.begin(), ie = Actions.end();
it != ie; ++it)
delete *it;
// Free redirections of stdout/stderr.
if (Redirects) {
delete Redirects[1];
delete Redirects[2];
delete [] Redirects;
}
}
const DerivedArgList &Compilation::getArgsForToolChain(const ToolChain *TC,
const char *BoundArch) {
if (!TC)
TC = &DefaultToolChain;
DerivedArgList *&Entry = TCArgs[std::make_pair(TC, BoundArch)];
if (!Entry) {
Entry = TC->TranslateArgs(*TranslatedArgs, BoundArch);
if (!Entry)
Entry = TranslatedArgs;
}
return *Entry;
}
void Compilation::PrintJob(raw_ostream &OS, const Job &J,
const char *Terminator, bool Quote) const {
if (const Command *C = dyn_cast<Command>(&J)) {
OS << " \"" << C->getExecutable() << '"';
for (ArgStringList::const_iterator it = C->getArguments().begin(),
ie = C->getArguments().end(); it != ie; ++it) {
OS << ' ';
if (!Quote && !std::strpbrk(*it, " \"\\$")) {
OS << *it;
continue;
}
// Quote the argument and escape shell special characters; this isn't
// really complete but is good enough.
OS << '"';
for (const char *s = *it; *s; ++s) {
if (*s == '"' || *s == '\\' || *s == '$')
OS << '\\';
OS << *s;
}
OS << '"';
}
OS << Terminator;
} else {
const JobList *Jobs = cast<JobList>(&J);
for (JobList::const_iterator
it = Jobs->begin(), ie = Jobs->end(); it != ie; ++it)
PrintJob(OS, **it, Terminator, Quote);
}
}
static bool skipArg(const char *Flag, bool &SkipNextArg) {
StringRef FlagRef(Flag);
// Assume we're going to see -Flag <Arg>.
SkipNextArg = true;
// These flags are all of the form -Flag <Arg> and are treated as two
// arguments. Therefore, we need to skip the flag and the next argument.
bool Res = llvm::StringSwitch<bool>(Flag)
.Cases("-I", "-MF", "-MT", "-MQ", true)
.Cases("-o", "-coverage-file", "-dependency-file", true)
.Cases("-fdebug-compilation-dir", "-idirafter", true)
.Cases("-include", "-include-pch", "-internal-isystem", true)
.Cases("-internal-externc-isystem", "-iprefix", "-iwithprefix", true)
.Cases("-iwithprefixbefore", "-isysroot", "-isystem", "-iquote", true)
.Cases("-resource-dir", "-serialize-diagnostic-file", true)
.Case("-dwarf-debug-flags", true)
.Default(false);
// Match found.
if (Res)
return Res;
// The remaining flags are treated as a single argument.
SkipNextArg = false;
// These flags are all of the form -Flag and have no second argument.
Res = llvm::StringSwitch<bool>(Flag)
.Cases("-M", "-MM", "-MG", "-MP", "-MD", true)
.Case("-MMD", true)
.Default(false);
// Match found.
if (Res)
return Res;
// These flags are treated as a single argument (e.g., -F<Dir>).
if (FlagRef.startswith("-F") || FlagRef.startswith("-I"))
return true;
return false;
}
static bool quoteNextArg(const char *flag) {
return llvm::StringSwitch<bool>(flag)
.Case("-D", true)
.Default(false);
}
void Compilation::PrintDiagnosticJob(raw_ostream &OS, const Job &J) const {
if (const Command *C = dyn_cast<Command>(&J)) {
OS << C->getExecutable();
unsigned QuoteNextArg = 0;
for (ArgStringList::const_iterator it = C->getArguments().begin(),
ie = C->getArguments().end(); it != ie; ++it) {
bool SkipNext;
if (skipArg(*it, SkipNext)) {
if (SkipNext) ++it;
continue;
}
if (!QuoteNextArg)
QuoteNextArg = quoteNextArg(*it) ? 2 : 0;
OS << ' ';
if (QuoteNextArg == 1)
OS << '"';
if (!std::strpbrk(*it, " \"\\$")) {
OS << *it;
} else {
// Quote the argument and escape shell special characters; this isn't
// really complete but is good enough.
OS << '"';
for (const char *s = *it; *s; ++s) {
if (*s == '"' || *s == '\\' || *s == '$')
OS << '\\';
OS << *s;
}
OS << '"';
}
if (QuoteNextArg) {
if (QuoteNextArg == 1)
OS << '"';
--QuoteNextArg;
}
}
OS << '\n';
} else {
const JobList *Jobs = cast<JobList>(&J);
for (JobList::const_iterator
it = Jobs->begin(), ie = Jobs->end(); it != ie; ++it)
PrintDiagnosticJob(OS, **it);
}
}
bool Compilation::CleanupFile(const char *File, bool IssueErrors) const {
std::string P(File);
// 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 (llvm::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)
getDriver().Diag(clang::diag::err_drv_unable_to_remove_file)
<< 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)
continue;
Success &= CleanupFile(it->second, IssueErrors);
}
return Success;
}
int Compilation::ExecuteCommand(const Command &C,
const Command *&FailingCommand) const {
std::string Prog(C.getExecutable());
const char **Argv = new const char*[C.getArguments().size() + 2];
Argv[0] = C.getExecutable();
std::copy(C.getArguments().begin(), C.getArguments().end(), Argv+1);
Argv[C.getArguments().size() + 1] = 0;
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::string Error;
OS = new llvm::raw_fd_ostream(getDriver().CCPrintOptionsFilename, Error,
llvm::sys::fs::F_Append);
if (!Error.empty()) {
getDriver().Diag(clang::diag::err_drv_cc_print_options_failure)
<< Error;
FailingCommand = &C;
delete OS;
return 1;
}
}
if (getDriver().CCPrintOptions)
*OS << "[Logging clang options]";
PrintJob(*OS, C, "\n", /*Quote=*/getDriver().CCPrintOptions);
if (OS != &llvm::errs())
delete OS;
}
std::string Error;
bool ExecutionFailed;
int Res = llvm::sys::ExecuteAndWait(Prog, Argv, /*env*/ 0, Redirects,
/*secondsToWait*/ 0, /*memoryLimit*/ 0,
&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;
delete[] Argv;
return ExecutionFailed ? 1 : Res;
}
typedef SmallVectorImpl< std::pair<int, const Command *> > FailingCommandList;
static bool ActionFailed(const Action *A,
const FailingCommandList &FailingCommands) {
if (FailingCommands.empty())
return false;
for (FailingCommandList::const_iterator CI = FailingCommands.begin(),
CE = FailingCommands.end(); CI != CE; ++CI)
if (A == &(CI->second->getSource()))
return true;
for (Action::const_iterator AI = A->begin(), AE = A->end(); AI != AE; ++AI)
if (ActionFailed(*AI, FailingCommands))
return true;
return false;
}
static bool InputsOk(const Command &C,
const FailingCommandList &FailingCommands) {
return !ActionFailed(&C.getSource(), FailingCommands);
}
void Compilation::ExecuteJob(const Job &J,
FailingCommandList &FailingCommands) const {
if (const Command *C = dyn_cast<Command>(&J)) {
if (!InputsOk(*C, FailingCommands))
return;
const Command *FailingCommand = 0;
if (int Res = ExecuteCommand(*C, FailingCommand))
FailingCommands.push_back(std::make_pair(Res, FailingCommand));
} else {
const JobList *Jobs = cast<JobList>(&J);
for (JobList::const_iterator it = Jobs->begin(), ie = Jobs->end();
it != ie; ++it)
ExecuteJob(**it, FailingCommands);
}
}
void Compilation::initCompilationForDiagnostics() {
// Free actions and jobs.
DeleteContainerPointers(Actions);
Jobs.clear();
// Clear temporary/results file lists.
TempFiles.clear();
ResultFiles.clear();
FailureResultFiles.clear();
// 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]))
TranslatedArgs->eraseArg(OutputOpts[i]);
}
TranslatedArgs->ClaimAllArgs();
// Redirect stdout/stderr to /dev/null.
Redirects = new const StringRef*[3]();
Redirects[0] = 0;
Redirects[1] = new const StringRef();
Redirects[2] = new const StringRef();
}
StringRef Compilation::getSysRoot() const {
return getDriver().SysRoot;
}
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