llvm-project/clang/tools/driver/driver.cpp

299 lines
10 KiB
C++
Raw Normal View History

//===-- 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.
//
//===----------------------------------------------------------------------===//
//
// This is the entry point to the clang driver; it is a thin wrapper
// for functionality in the Driver clang library.
//
//===----------------------------------------------------------------------===//
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/Option.h"
#include "clang/Frontend/DiagnosticOptions.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/Config/config.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Regex.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Host.h"
#include "llvm/System/Path.h"
#include "llvm/System/Signals.h"
using namespace clang;
using namespace clang::driver;
llvm::sys::Path GetExecutablePath(const char *Argv0, bool CanonicalPrefixes) {
if (!CanonicalPrefixes)
return llvm::sys::Path(Argv0);
// This just needs to be some symbol in the binary; C++ doesn't
// allow taking the address of ::main however.
void *P = (void*) (intptr_t) GetExecutablePath;
return llvm::sys::Path::GetMainExecutable(Argv0, P);
}
static const char *SaveStringInSet(std::set<std::string> &SavedStrings,
llvm::StringRef S) {
return SavedStrings.insert(S).first->c_str();
}
/// ApplyQAOverride - Apply a list of edits to the input argument lists.
///
/// The input string is a space separate list of edits to perform,
/// they are applied in order to the input argument lists. Edits
/// should be one of the following forms:
///
/// '#': Silence information about the changes to the command line arguments.
///
/// '^': Add FOO as a new argument at the beginning of the command line.
///
/// '+': Add FOO as a new argument at the end of the command line.
///
/// 's/XXX/YYY/': Substitute the regular expression XXX with YYY in the command
/// line.
///
/// 'xOPTION': Removes all instances of the literal argument OPTION.
///
/// 'XOPTION': Removes all instances of the literal argument OPTION,
/// and the following argument.
///
/// 'Ox': Removes all flags matching 'O' or 'O[sz0-9]' and adds 'Ox'
/// at the end of the command line.
///
/// \param OS - The stream to write edit information to.
/// \param Args - The vector of command line arguments.
/// \param Edit - The override command to perform.
/// \param SavedStrings - Set to use for storing string representations.
static void ApplyOneQAOverride(llvm::raw_ostream &OS,
std::vector<const char*> &Args,
llvm::StringRef Edit,
std::set<std::string> &SavedStrings) {
// This does not need to be efficient.
if (Edit[0] == '^') {
const char *Str =
SaveStringInSet(SavedStrings, Edit.substr(1));
OS << "### Adding argument " << Str << " at beginning\n";
Args.insert(Args.begin() + 1, Str);
} else if (Edit[0] == '+') {
const char *Str =
SaveStringInSet(SavedStrings, Edit.substr(1));
OS << "### Adding argument " << Str << " at end\n";
Args.push_back(Str);
} else if (Edit[0] == 's' && Edit[1] == '/' && Edit.endswith("/") &&
Edit.slice(2, Edit.size()-1).find('/') != llvm::StringRef::npos) {
llvm::StringRef MatchPattern = Edit.substr(2).split('/').first;
llvm::StringRef ReplPattern = Edit.substr(2).split('/').second;
ReplPattern = ReplPattern.slice(0, ReplPattern.size()-1);
for (unsigned i = 1, e = Args.size(); i != e; ++i) {
std::string Repl = llvm::Regex(MatchPattern).sub(ReplPattern, Args[i]);
if (Repl != Args[i]) {
OS << "### Replacing '" << Args[i] << "' with '" << Repl << "'\n";
Args[i] = SaveStringInSet(SavedStrings, Repl);
}
}
} else if (Edit[0] == 'x' || Edit[0] == 'X') {
std::string Option = Edit.substr(1, std::string::npos);
for (unsigned i = 1; i < Args.size();) {
if (Option == Args[i]) {
OS << "### Deleting argument " << Args[i] << '\n';
Args.erase(Args.begin() + i);
if (Edit[0] == 'X') {
if (i < Args.size()) {
OS << "### Deleting argument " << Args[i] << '\n';
Args.erase(Args.begin() + i);
} else
OS << "### Invalid X edit, end of command line!\n";
}
} else
++i;
}
} else if (Edit[0] == 'O') {
for (unsigned i = 1; i < Args.size();) {
const char *A = Args[i];
if (A[0] == '-' && A[1] == 'O' &&
(A[2] == '\0' ||
(A[3] == '\0' && (A[2] == 's' || A[2] == 'z' ||
('0' <= A[2] && A[2] <= '9'))))) {
OS << "### Deleting argument " << Args[i] << '\n';
Args.erase(Args.begin() + i);
} else
++i;
}
OS << "### Adding argument " << Edit << " at end\n";
Args.push_back(SaveStringInSet(SavedStrings, '-' + Edit.str()));
} else {
OS << "### Unrecognized edit: " << Edit << "\n";
}
}
/// ApplyQAOverride - Apply a comma separate list of edits to the
/// input argument lists. See ApplyOneQAOverride.
static void ApplyQAOverride(std::vector<const char*> &Args,
const char *OverrideStr,
std::set<std::string> &SavedStrings) {
llvm::raw_ostream *OS = &llvm::errs();
if (OverrideStr[0] == '#') {
++OverrideStr;
OS = &llvm::nulls();
}
*OS << "### QA_OVERRIDE_GCC3_OPTIONS: " << OverrideStr << "\n";
// This does not need to be efficient.
const char *S = OverrideStr;
while (*S) {
const char *End = ::strchr(S, ' ');
if (!End)
End = S + strlen(S);
if (End != S)
ApplyOneQAOverride(*OS, Args, std::string(S, End), SavedStrings);
S = End;
if (*S != '\0')
++S;
}
}
extern int cc1_main(const char **ArgBegin, const char **ArgEnd,
const char *Argv0, void *MainAddr);
extern int cc1as_main(const char **ArgBegin, const char **ArgEnd,
const char *Argv0, void *MainAddr);
int main(int argc, const char **argv) {
llvm::sys::PrintStackTraceOnErrorSignal();
llvm::PrettyStackTraceProgram X(argc, argv);
// Handle -cc1 integrated tools.
if (argc > 1 && llvm::StringRef(argv[1]).startswith("-cc1")) {
llvm::StringRef Tool = argv[1] + 4;
if (Tool == "")
return cc1_main(argv+2, argv+argc, argv[0],
(void*) (intptr_t) GetExecutablePath);
if (Tool == "as")
return cc1as_main(argv+2, argv+argc, argv[0],
(void*) (intptr_t) GetExecutablePath);
// Reject unknown tools.
llvm::errs() << "error: unknown integrated tool '" << Tool << "'\n";
return 1;
}
bool CanonicalPrefixes = true;
for (int i = 1; i < argc; ++i) {
if (llvm::StringRef(argv[i]) == "-no-canonical-prefixes") {
CanonicalPrefixes = false;
break;
}
}
llvm::sys::Path Path = GetExecutablePath(argv[0], CanonicalPrefixes);
TextDiagnosticPrinter DiagClient(llvm::errs(), DiagnosticOptions());
DiagClient.setPrefix(Path.getBasename());
Diagnostic Diags(&DiagClient);
#ifdef CLANG_IS_PRODUCTION
2010-03-09 02:33:04 +08:00
const bool IsProduction = true;
# ifdef CLANGXX_IS_PRODUCTION
const bool CXXIsProduction = true;
# else
const bool CXXIsProduction = false;
# endif
#else
2010-03-09 02:33:04 +08:00
const bool IsProduction = false;
const bool CXXIsProduction = false;
#endif
Driver TheDriver(Path.getBasename(), Path.getDirname(),
llvm::sys::getHostTriple(),
"a.out", IsProduction, CXXIsProduction,
Diags);
// Check for ".*++" or ".*++-[^-]*" to determine if we are a C++
// compiler. This matches things like "c++", "clang++", and "clang++-1.1".
//
// Note that we intentionally want to use argv[0] here, to support "clang++"
// being a symlink.
//
// We use *argv instead of argv[0] to work around a bogus g++ warning.
std::string ProgName(llvm::sys::Path(*argv).getBasename());
if (llvm::StringRef(ProgName).endswith("++") ||
llvm::StringRef(ProgName).rsplit('-').first.endswith("++")) {
TheDriver.CCCIsCXX = true;
TheDriver.CCCGenericGCCName = "g++";
}
llvm::OwningPtr<Compilation> C;
// Handle CC_PRINT_OPTIONS and CC_PRINT_OPTIONS_FILE.
TheDriver.CCPrintOptions = !!::getenv("CC_PRINT_OPTIONS");
if (TheDriver.CCPrintOptions)
TheDriver.CCPrintOptionsFilename = ::getenv("CC_PRINT_OPTIONS_FILE");
// Handle QA_OVERRIDE_GCC3_OPTIONS and CCC_ADD_ARGS, used for editing a
// command line behind the scenes.
std::set<std::string> SavedStrings;
if (const char *OverrideStr = ::getenv("QA_OVERRIDE_GCC3_OPTIONS")) {
// FIXME: Driver shouldn't take extra initial argument.
std::vector<const char*> StringPointers(argv, argv + argc);
ApplyQAOverride(StringPointers, OverrideStr, SavedStrings);
C.reset(TheDriver.BuildCompilation(StringPointers.size(),
&StringPointers[0]));
} else if (const char *Cur = ::getenv("CCC_ADD_ARGS")) {
std::vector<const char*> StringPointers;
// FIXME: Driver shouldn't take extra initial argument.
StringPointers.push_back(argv[0]);
for (;;) {
const char *Next = strchr(Cur, ',');
if (Next) {
StringPointers.push_back(SaveStringInSet(SavedStrings,
std::string(Cur, Next)));
Cur = Next + 1;
} else {
if (*Cur != '\0')
StringPointers.push_back(SaveStringInSet(SavedStrings, Cur));
break;
}
}
StringPointers.insert(StringPointers.end(), argv + 1, argv + argc);
C.reset(TheDriver.BuildCompilation(StringPointers.size(),
&StringPointers[0]));
} else
C.reset(TheDriver.BuildCompilation(argc, argv));
int Res = 0;
if (C.get())
Res = TheDriver.ExecuteCompilation(*C);
// If any timers were active but haven't been destroyed yet, print their
// results now. This happens in -disable-free mode.
llvm::TimerGroup::printAll(llvm::errs());
llvm::llvm_shutdown();
return Res;
}