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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/Options.h"
#include "clang/Driver/ToolChain.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Program.h"
#include <sys/stat.h>
#include <errno.h>
using namespace clang::driver;
using namespace clang;
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);
}
}
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;
// Don't try to remove files which we don't have write access to (but may be
// able to remove). Underlying tools may have intentionally not overwritten
// them.
if (!P.canWrite())
continue;
if (P.eraseFromDisk(false, &Error)) {
// Failure is only failure if the file exists and is "regular". There is
// a race condition here due to the limited interface of
// llvm::sys::Path, we want to know if the removal gave ENOENT.
// FIXME: Grumble, P.exists() is broken. PR3837.
struct stat buf;
if (::stat(P.c_str(), &buf) == 0 ? (buf.st_mode & S_IFMT) == S_IFREG :
(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 || 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::raw_fd_ostream::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;
int Res =
llvm::sys::Program::ExecuteAndWait(Prog, Argv,
/*env*/0, Redirects,
/*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 {
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;
}
}
void Compilation::initCompilationForDiagnostics(void) {
// Free actions and jobs.
DeleteContainerPointers(Actions);
Jobs.clear();
// Clear temporary/results file lists.
TempFiles.clear();
ResultFiles.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; i != sizeof(OutputOpts)/sizeof(OutputOpts[0]); ++i) {
if (TranslatedArgs->hasArg(OutputOpts[i]))
TranslatedArgs->eraseArg(OutputOpts[i]);
}
TranslatedArgs->ClaimAllArgs();
// Redirect stdout/stderr to /dev/null.
Redirects = new const llvm::sys::Path*[3]();
Redirects[1] = new const llvm::sys::Path();
Redirects[2] = new const llvm::sys::Path();
}
StringRef Compilation::getSysRoot(void) const {
return getDriver().SysRoot;
}
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