forked from OSchip/llvm-project
385 lines
13 KiB
C++
385 lines
13 KiB
C++
//===-- driver.cpp - Clang GCC-Compatible Driver --------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This is the entry point to the clang driver; it is a thin wrapper
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// for functionality in the Driver clang library.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Driver/Compilation.h"
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#include "clang/Driver/Driver.h"
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#include "clang/Driver/Option.h"
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#include "clang/Frontend/DiagnosticOptions.h"
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/Config/config.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Regex.h"
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#include "llvm/Support/Timer.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/System/Host.h"
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#include "llvm/System/Path.h"
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#include "llvm/System/Program.h"
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#include "llvm/System/Signals.h"
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using namespace clang;
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using namespace clang::driver;
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llvm::sys::Path GetExecutablePath(const char *Argv0, bool CanonicalPrefixes) {
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if (!CanonicalPrefixes)
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return llvm::sys::Path(Argv0);
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// This just needs to be some symbol in the binary; C++ doesn't
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// allow taking the address of ::main however.
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void *P = (void*) (intptr_t) GetExecutablePath;
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return llvm::sys::Path::GetMainExecutable(Argv0, P);
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}
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static const char *SaveStringInSet(std::set<std::string> &SavedStrings,
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llvm::StringRef S) {
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return SavedStrings.insert(S).first->c_str();
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}
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/// ApplyQAOverride - Apply a list of edits to the input argument lists.
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///
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/// The input string is a space separate list of edits to perform,
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/// they are applied in order to the input argument lists. Edits
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/// should be one of the following forms:
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///
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/// '#': Silence information about the changes to the command line arguments.
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///
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/// '^': Add FOO as a new argument at the beginning of the command line.
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///
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/// '+': Add FOO as a new argument at the end of the command line.
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///
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/// 's/XXX/YYY/': Substitute the regular expression XXX with YYY in the command
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/// line.
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///
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/// 'xOPTION': Removes all instances of the literal argument OPTION.
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///
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/// 'XOPTION': Removes all instances of the literal argument OPTION,
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/// and the following argument.
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///
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/// 'Ox': Removes all flags matching 'O' or 'O[sz0-9]' and adds 'Ox'
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/// at the end of the command line.
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///
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/// \param OS - The stream to write edit information to.
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/// \param Args - The vector of command line arguments.
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/// \param Edit - The override command to perform.
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/// \param SavedStrings - Set to use for storing string representations.
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static void ApplyOneQAOverride(llvm::raw_ostream &OS,
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llvm::SmallVectorImpl<const char*> &Args,
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llvm::StringRef Edit,
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std::set<std::string> &SavedStrings) {
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// This does not need to be efficient.
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if (Edit[0] == '^') {
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const char *Str =
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SaveStringInSet(SavedStrings, Edit.substr(1));
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OS << "### Adding argument " << Str << " at beginning\n";
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Args.insert(Args.begin() + 1, Str);
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} else if (Edit[0] == '+') {
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const char *Str =
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SaveStringInSet(SavedStrings, Edit.substr(1));
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OS << "### Adding argument " << Str << " at end\n";
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Args.push_back(Str);
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} else if (Edit[0] == 's' && Edit[1] == '/' && Edit.endswith("/") &&
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Edit.slice(2, Edit.size()-1).find('/') != llvm::StringRef::npos) {
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llvm::StringRef MatchPattern = Edit.substr(2).split('/').first;
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llvm::StringRef ReplPattern = Edit.substr(2).split('/').second;
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ReplPattern = ReplPattern.slice(0, ReplPattern.size()-1);
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for (unsigned i = 1, e = Args.size(); i != e; ++i) {
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std::string Repl = llvm::Regex(MatchPattern).sub(ReplPattern, Args[i]);
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if (Repl != Args[i]) {
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OS << "### Replacing '" << Args[i] << "' with '" << Repl << "'\n";
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Args[i] = SaveStringInSet(SavedStrings, Repl);
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}
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}
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} else if (Edit[0] == 'x' || Edit[0] == 'X') {
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std::string Option = Edit.substr(1, std::string::npos);
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for (unsigned i = 1; i < Args.size();) {
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if (Option == Args[i]) {
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OS << "### Deleting argument " << Args[i] << '\n';
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Args.erase(Args.begin() + i);
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if (Edit[0] == 'X') {
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if (i < Args.size()) {
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OS << "### Deleting argument " << Args[i] << '\n';
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Args.erase(Args.begin() + i);
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} else
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OS << "### Invalid X edit, end of command line!\n";
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}
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} else
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++i;
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}
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} else if (Edit[0] == 'O') {
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for (unsigned i = 1; i < Args.size();) {
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const char *A = Args[i];
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if (A[0] == '-' && A[1] == 'O' &&
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(A[2] == '\0' ||
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(A[3] == '\0' && (A[2] == 's' || A[2] == 'z' ||
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('0' <= A[2] && A[2] <= '9'))))) {
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OS << "### Deleting argument " << Args[i] << '\n';
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Args.erase(Args.begin() + i);
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} else
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++i;
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}
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OS << "### Adding argument " << Edit << " at end\n";
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Args.push_back(SaveStringInSet(SavedStrings, '-' + Edit.str()));
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} else {
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OS << "### Unrecognized edit: " << Edit << "\n";
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}
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}
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/// ApplyQAOverride - Apply a comma separate list of edits to the
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/// input argument lists. See ApplyOneQAOverride.
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static void ApplyQAOverride(llvm::SmallVectorImpl<const char*> &Args,
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const char *OverrideStr,
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std::set<std::string> &SavedStrings) {
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llvm::raw_ostream *OS = &llvm::errs();
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if (OverrideStr[0] == '#') {
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++OverrideStr;
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OS = &llvm::nulls();
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}
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*OS << "### QA_OVERRIDE_GCC3_OPTIONS: " << OverrideStr << "\n";
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// This does not need to be efficient.
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const char *S = OverrideStr;
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while (*S) {
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const char *End = ::strchr(S, ' ');
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if (!End)
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End = S + strlen(S);
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if (End != S)
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ApplyOneQAOverride(*OS, Args, std::string(S, End), SavedStrings);
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S = End;
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if (*S != '\0')
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++S;
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}
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}
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extern int cc1_main(const char **ArgBegin, const char **ArgEnd,
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const char *Argv0, void *MainAddr);
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extern int cc1as_main(const char **ArgBegin, const char **ArgEnd,
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const char *Argv0, void *MainAddr);
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static void ExpandArgsFromBuf(const char *Arg,
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llvm::SmallVectorImpl<const char*> &ArgVector,
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std::set<std::string> &SavedStrings) {
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const char *FName = Arg + 1;
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llvm::MemoryBuffer *MemBuf = llvm::MemoryBuffer::getFile(FName);
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if (!MemBuf) {
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ArgVector.push_back(SaveStringInSet(SavedStrings, Arg));
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return;
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}
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const char *Buf = MemBuf->getBufferStart();
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char InQuote = ' ';
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std::string CurArg;
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for (const char *P = Buf; ; ++P) {
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if (*P == '\0' || (isspace(*P) && InQuote == ' ')) {
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if (!CurArg.empty()) {
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if (CurArg[0] != '@') {
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ArgVector.push_back(SaveStringInSet(SavedStrings, CurArg));
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} else {
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ExpandArgsFromBuf(CurArg.c_str(), ArgVector, SavedStrings);
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}
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CurArg = "";
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}
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if (*P == '\0')
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break;
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else
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continue;
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}
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if (isspace(*P)) {
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if (InQuote != ' ')
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CurArg.push_back(*P);
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continue;
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}
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if (*P == '"' || *P == '\'') {
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if (InQuote == *P)
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InQuote = ' ';
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else if (InQuote == ' ')
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InQuote = *P;
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else
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CurArg.push_back(*P);
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continue;
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}
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if (*P == '\\') {
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++P;
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if (*P != '\0')
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CurArg.push_back(*P);
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continue;
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}
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CurArg.push_back(*P);
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}
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delete MemBuf;
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}
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static void ExpandArgv(int argc, const char **argv,
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llvm::SmallVectorImpl<const char*> &ArgVector,
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std::set<std::string> &SavedStrings) {
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for (int i = 0; i < argc; ++i) {
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const char *Arg = argv[i];
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if (Arg[0] != '@') {
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ArgVector.push_back(SaveStringInSet(SavedStrings, std::string(Arg)));
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continue;
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}
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ExpandArgsFromBuf(Arg, ArgVector, SavedStrings);
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}
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}
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int main(int argc_, const char **argv_) {
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llvm::sys::PrintStackTraceOnErrorSignal();
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llvm::PrettyStackTraceProgram X(argc_, argv_);
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std::set<std::string> SavedStrings;
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llvm::SmallVector<const char*, 256> argv;
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ExpandArgv(argc_, argv_, argv, SavedStrings);
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// Handle -cc1 integrated tools.
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if (argv.size() > 1 && llvm::StringRef(argv[1]).startswith("-cc1")) {
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llvm::StringRef Tool = argv[1] + 4;
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if (Tool == "")
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return cc1_main(argv.data()+2, argv.data()+argv.size(), argv[0],
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(void*) (intptr_t) GetExecutablePath);
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if (Tool == "as")
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return cc1as_main(argv.data()+2, argv.data()+argv.size(), argv[0],
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(void*) (intptr_t) GetExecutablePath);
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// Reject unknown tools.
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llvm::errs() << "error: unknown integrated tool '" << Tool << "'\n";
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return 1;
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}
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bool CanonicalPrefixes = true;
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for (int i = 1, size = argv.size(); i < size; ++i) {
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if (llvm::StringRef(argv[i]) == "-no-canonical-prefixes") {
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CanonicalPrefixes = false;
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break;
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}
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}
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llvm::sys::Path Path = GetExecutablePath(argv[0], CanonicalPrefixes);
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TextDiagnosticPrinter DiagClient(llvm::errs(), DiagnosticOptions());
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DiagClient.setPrefix(Path.getBasename());
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Diagnostic Diags(&DiagClient);
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#ifdef CLANG_IS_PRODUCTION
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const bool IsProduction = true;
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# ifdef CLANGXX_IS_PRODUCTION
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const bool CXXIsProduction = true;
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# else
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const bool CXXIsProduction = false;
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# endif
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#else
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const bool IsProduction = false;
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const bool CXXIsProduction = false;
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#endif
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Driver TheDriver(Path.str(), llvm::sys::getHostTriple(),
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"a.out", IsProduction, CXXIsProduction,
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Diags);
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// Attempt to find the original path used to invoke the driver, to determine
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// the installed path. We do this manually, because we want to support that
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// path being a symlink.
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llvm::sys::Path InstalledPath(argv[0]);
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// Do a PATH lookup, if there are no directory components.
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if (InstalledPath.getLast() == InstalledPath.str()) {
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llvm::sys::Path Tmp =
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llvm::sys::Program::FindProgramByName(InstalledPath.getLast());
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if (!Tmp.empty())
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InstalledPath = Tmp;
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}
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InstalledPath.makeAbsolute();
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InstalledPath.eraseComponent();
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if (InstalledPath.exists())
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TheDriver.setInstalledDir(InstalledPath.str());
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// Check for ".*++" or ".*++-[^-]*" to determine if we are a C++
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// compiler. This matches things like "c++", "clang++", and "clang++-1.1".
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//
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// Note that we intentionally want to use argv[0] here, to support "clang++"
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// being a symlink.
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//
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// We use *argv instead of argv[0] to work around a bogus g++ warning.
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const char *progname = argv_[0];
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std::string ProgName(llvm::sys::Path(progname).getBasename());
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if (llvm::StringRef(ProgName).endswith("++") ||
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llvm::StringRef(ProgName).rsplit('-').first.endswith("++")) {
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TheDriver.CCCIsCXX = true;
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TheDriver.CCCGenericGCCName = "g++";
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}
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// Handle CC_PRINT_OPTIONS and CC_PRINT_OPTIONS_FILE.
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TheDriver.CCPrintOptions = !!::getenv("CC_PRINT_OPTIONS");
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if (TheDriver.CCPrintOptions)
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TheDriver.CCPrintOptionsFilename = ::getenv("CC_PRINT_OPTIONS_FILE");
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// Handle QA_OVERRIDE_GCC3_OPTIONS and CCC_ADD_ARGS, used for editing a
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// command line behind the scenes.
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if (const char *OverrideStr = ::getenv("QA_OVERRIDE_GCC3_OPTIONS")) {
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// FIXME: Driver shouldn't take extra initial argument.
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ApplyQAOverride(argv, OverrideStr, SavedStrings);
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} else if (const char *Cur = ::getenv("CCC_ADD_ARGS")) {
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// FIXME: Driver shouldn't take extra initial argument.
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std::vector<const char*> ExtraArgs;
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for (;;) {
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const char *Next = strchr(Cur, ',');
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if (Next) {
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ExtraArgs.push_back(SaveStringInSet(SavedStrings,
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std::string(Cur, Next)));
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Cur = Next + 1;
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} else {
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if (*Cur != '\0')
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ExtraArgs.push_back(SaveStringInSet(SavedStrings, Cur));
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break;
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}
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}
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argv.insert(&argv[1], ExtraArgs.begin(), ExtraArgs.end());
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}
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llvm::OwningPtr<Compilation> C(TheDriver.BuildCompilation(argv.size(),
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&argv[0]));
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int Res = 0;
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if (C.get())
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Res = TheDriver.ExecuteCompilation(*C);
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// If any timers were active but haven't been destroyed yet, print their
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// results now. This happens in -disable-free mode.
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llvm::TimerGroup::printAll(llvm::errs());
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llvm::llvm_shutdown();
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return Res;
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}
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