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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/ArgList.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/ToolChain.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Program.h"
#include <sys/stat.h>
#include <errno.h>
using namespace clang::driver;
Compilation::Compilation(Driver &D,
ToolChain &_DefaultToolChain,
InputArgList *_Args)
: TheDriver(D), DefaultToolChain(_DefaultToolChain), Args(_Args) {
}
Compilation::~Compilation() {
delete Args;
// Free any derived arg lists.
for (llvm::DenseMap<const ToolChain*, DerivedArgList*>::iterator
it = TCArgs.begin(), ie = TCArgs.end(); it != ie; ++it)
delete it->second;
// Free the actions, if built.
for (ActionList::iterator it = Actions.begin(), ie = Actions.end();
it != ie; ++it)
delete *it;
}
const DerivedArgList &Compilation::getArgsForToolChain(const ToolChain *TC) {
if (!TC)
TC = &DefaultToolChain;
DerivedArgList *&Entry = TCArgs[TC];
if (!Entry)
Entry = TC->TranslateArgs(*Args);
return *Entry;
}
void Compilation::PrintJob(llvm::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) {
if (Quote)
OS << " \"" << *it << '"';
else
OS << ' ' << *it;
}
OS << Terminator;
} else if (const PipedJob *PJ = dyn_cast<PipedJob>(&J)) {
for (PipedJob::const_iterator
it = PJ->begin(), ie = PJ->end(); it != ie; ++it)
PrintJob(OS, **it, (it + 1 != PJ->end()) ? " |\n" : "\n", Quote);
} 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);
}
}
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) {
llvm::sys::Path P(*it);
std::string Error;
if (P.eraseFromDisk(false, &Error)) {
// Failure is only failure if the file doesn't exist. There is a
// race condition here due to the limited interface of
// llvm::sys::Path, we want to know if the removal gave E_NOENT.
// FIXME: Grumble, P.exists() is broken. PR3837.
struct stat buf;
if (::stat(P.c_str(), &buf) == 0
|| errno != ENOENT) {
if (IssueErrors)
getDriver().Diag(clang::diag::err_drv_unable_to_remove_file)
<< Error;
Success = false;
}
}
}
return Success;
}
int Compilation::ExecuteCommand(const Command &C,
const Command *&FailingCommand) const {
llvm::sys::Path 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().CCCEcho || getArgs().hasArg(options::OPT_v))
PrintJob(llvm::errs(), C, "\n", false);
std::string Error;
int Res =
llvm::sys::Program::ExecuteAndWait(Prog, Argv,
/*env*/0, /*redirects*/0,
/*secondsToWait*/0, /*memoryLimit*/0,
&Error);
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 Res;
}
int Compilation::ExecuteJob(const Job &J,
const Command *&FailingCommand) const {
if (const Command *C = dyn_cast<Command>(&J)) {
return ExecuteCommand(*C, FailingCommand);
} else if (const PipedJob *PJ = dyn_cast<PipedJob>(&J)) {
// Piped commands with a single job are easy.
if (PJ->size() == 1)
return ExecuteCommand(**PJ->begin(), FailingCommand);
FailingCommand = *PJ->begin();
getDriver().Diag(clang::diag::err_drv_unsupported_opt) << "-pipe";
return 1;
} else {
const JobList *Jobs = cast<JobList>(&J);
for (JobList::const_iterator
it = Jobs->begin(), ie = Jobs->end(); it != ie; ++it)
if (int Res = ExecuteJob(**it, FailingCommand))
return Res;
return 0;
}
}
int Compilation::Execute() const {
// Just print if -### was present.
if (getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
PrintJob(llvm::errs(), Jobs, "\n", true);
return 0;
}
// If there were errors building the compilation, quit now.
if (getDriver().getDiags().getNumErrors())
return 1;
const Command *FailingCommand = 0;
int Res = ExecuteJob(Jobs, FailingCommand);
// Remove temp files.
CleanupFileList(TempFiles);
// If the compilation failed, remove result files as well.
if (Res != 0 && !getArgs().hasArg(options::OPT_save_temps))
CleanupFileList(ResultFiles, true);
// Print extra information about abnormal failures, if possible.
if (Res) {
// 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 Action &Source = FailingCommand->getSource();
bool IsFriendlyTool = (isa<PreprocessJobAction>(Source) ||
isa<PrecompileJobAction>(Source) ||
isa<AnalyzeJobAction>(Source) ||
isa<CompileJobAction>(Source));
if (!IsFriendlyTool || Res != 1) {
// FIXME: See FIXME above regarding result code interpretation.
if (Res < 0)
getDriver().Diag(clang::diag::err_drv_command_signalled)
<< Source.getClassName() << -Res;
else
getDriver().Diag(clang::diag::err_drv_command_failed)
<< Source.getClassName() << Res;
}
}
return Res;
}
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