458 lines
16 KiB
C++
458 lines
16 KiB
C++
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//===-- 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/Basic/CharInfo.h"
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#include "clang/Basic/DiagnosticOptions.h"
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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/DriverDiagnostic.h"
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#include "clang/Driver/Options.h"
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#include "clang/Frontend/CompilerInvocation.h"
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "clang/Frontend/Utils.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/OwningPtr.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/STLExtras.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Option/OptTable.h"
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#include "llvm/Option/Option.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Host.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/Path.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Process.h"
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#include "llvm/Support/Program.h"
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#include "llvm/Support/Regex.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Support/TargetSelect.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/Support/system_error.h"
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using namespace clang;
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using namespace clang::driver;
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using namespace llvm::opt;
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std::string GetExecutablePath(const char *Argv0, bool CanonicalPrefixes) {
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if (!CanonicalPrefixes)
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return 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::fs::getMainExecutable(Argv0, P);
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}
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static const char *SaveStringInSet(std::set<std::string> &SavedStrings,
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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(raw_ostream &OS,
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SmallVectorImpl<const char*> &Args,
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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('/') != StringRef::npos) {
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StringRef MatchPattern = Edit.substr(2).split('/').first;
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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(SmallVectorImpl<const char*> &Args,
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const char *OverrideStr,
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std::set<std::string> &SavedStrings) {
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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 ParseProgName(SmallVectorImpl<const char *> &ArgVector,
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std::set<std::string> &SavedStrings,
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Driver &TheDriver)
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{
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// Try to infer frontend type and default target from the program name.
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// suffixes[] contains the list of known driver suffixes.
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// Suffixes are compared against the program name in order.
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// If there is a match, the frontend type is updated as necessary (CPP/C++).
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// If there is no match, a second round is done after stripping the last
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// hyphen and everything following it. This allows using something like
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// "clang++-2.9".
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// If there is a match in either the first or second round,
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// the function tries to identify a target as prefix. E.g.
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// "x86_64-linux-clang" as interpreted as suffix "clang" with
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// target prefix "x86_64-linux". If such a target prefix is found,
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// is gets added via -target as implicit first argument.
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static const struct {
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const char *Suffix;
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const char *ModeFlag;
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} suffixes [] = {
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{ "clang", 0 },
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{ "clang++", "--driver-mode=g++" },
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{ "clang-c++", "--driver-mode=g++" },
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{ "clang-cc", 0 },
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{ "clang-cpp", "--driver-mode=cpp" },
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{ "clang-g++", "--driver-mode=g++" },
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{ "clang-gcc", 0 },
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{ "clang-cl", "--driver-mode=cl" },
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{ "cc", 0 },
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{ "cpp", "--driver-mode=cpp" },
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{ "cl" , "--driver-mode=cl" },
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{ "++", "--driver-mode=g++" },
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};
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std::string ProgName(llvm::sys::path::stem(ArgVector[0]));
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std::transform(ProgName.begin(), ProgName.end(), ProgName.begin(),
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toLowercase);
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StringRef ProgNameRef(ProgName);
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StringRef Prefix;
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for (int Components = 2; Components; --Components) {
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bool FoundMatch = false;
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size_t i;
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for (i = 0; i < sizeof(suffixes) / sizeof(suffixes[0]); ++i) {
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if (ProgNameRef.endswith(suffixes[i].Suffix)) {
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FoundMatch = true;
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SmallVectorImpl<const char *>::iterator it = ArgVector.begin();
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if (it != ArgVector.end())
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++it;
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if (suffixes[i].ModeFlag)
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ArgVector.insert(it, suffixes[i].ModeFlag);
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break;
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}
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}
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if (FoundMatch) {
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StringRef::size_type LastComponent = ProgNameRef.rfind('-',
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ProgNameRef.size() - strlen(suffixes[i].Suffix));
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if (LastComponent != StringRef::npos)
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Prefix = ProgNameRef.slice(0, LastComponent);
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break;
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}
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StringRef::size_type LastComponent = ProgNameRef.rfind('-');
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if (LastComponent == StringRef::npos)
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break;
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ProgNameRef = ProgNameRef.slice(0, LastComponent);
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}
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if (Prefix.empty())
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return;
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std::string IgnoredError;
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if (llvm::TargetRegistry::lookupTarget(Prefix, IgnoredError)) {
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SmallVectorImpl<const char *>::iterator it = ArgVector.begin();
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if (it != ArgVector.end())
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++it;
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const char* Strings[] =
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{ SaveStringInSet(SavedStrings, std::string("-target")),
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SaveStringInSet(SavedStrings, Prefix) };
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ArgVector.insert(it, Strings, Strings + llvm::array_lengthof(Strings));
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}
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}
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namespace {
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class StringSetSaver : public llvm::cl::StringSaver {
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public:
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StringSetSaver(std::set<std::string> &Storage) : Storage(Storage) {}
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const char *SaveString(const char *Str) LLVM_OVERRIDE {
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return SaveStringInSet(Storage, Str);
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}
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private:
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std::set<std::string> &Storage;
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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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SmallVector<const char *, 256> argv;
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llvm::SpecificBumpPtrAllocator<char> ArgAllocator;
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llvm::error_code EC = llvm::sys::Process::GetArgumentVector(
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argv, llvm::ArrayRef<const char *>(argv_, argc_), ArgAllocator);
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if (EC) {
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llvm::errs() << "error: couldn't get arguments: " << EC.message() << '\n';
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return 1;
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}
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std::set<std::string> SavedStrings;
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StringSetSaver Saver(SavedStrings);
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llvm::cl::ExpandResponseFiles(Saver, llvm::cl::TokenizeGNUCommandLine, argv);
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// Handle -cc1 integrated tools.
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if (argv.size() > 1 && StringRef(argv[1]).startswith("-cc1")) {
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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 (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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// 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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}
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std::string Path = GetExecutablePath(argv[0], CanonicalPrefixes);
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IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions;
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{
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OwningPtr<OptTable> Opts(createDriverOptTable());
|
||
|
|
unsigned MissingArgIndex, MissingArgCount;
|
||
|
|
OwningPtr<InputArgList> Args(Opts->ParseArgs(argv.begin()+1, argv.end(),
|
||
|
|
MissingArgIndex,
|
||
|
|
MissingArgCount));
|
||
|
|
// We ignore MissingArgCount and the return value of ParseDiagnosticArgs.
|
||
|
|
// Any errors that would be diagnosed here will also be diagnosed later,
|
||
|
|
// when the DiagnosticsEngine actually exists.
|
||
|
|
(void) ParseDiagnosticArgs(*DiagOpts, *Args);
|
||
|
|
}
|
||
|
|
// Now we can create the DiagnosticsEngine with a properly-filled-out
|
||
|
|
// DiagnosticOptions instance.
|
||
|
|
TextDiagnosticPrinter *DiagClient
|
||
|
|
= new TextDiagnosticPrinter(llvm::errs(), &*DiagOpts);
|
||
|
|
|
||
|
|
// If the clang binary happens to be named cl.exe for compatibility reasons,
|
||
|
|
// use clang-cl.exe as the prefix to avoid confusion between clang and MSVC.
|
||
|
|
StringRef ExeBasename(llvm::sys::path::filename(Path));
|
||
|
|
if (ExeBasename.equals_lower("cl.exe"))
|
||
|
|
ExeBasename = "clang-cl.exe";
|
||
|
|
DiagClient->setPrefix(ExeBasename);
|
||
|
|
|
||
|
|
IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
|
||
|
|
|
||
|
|
DiagnosticsEngine Diags(DiagID, &*DiagOpts, DiagClient);
|
||
|
|
ProcessWarningOptions(Diags, *DiagOpts, /*ReportDiags=*/false);
|
||
|
|
|
||
|
|
Driver TheDriver(Path, llvm::sys::getDefaultTargetTriple(), "a.out", Diags);
|
||
|
|
|
||
|
|
// Attempt to find the original path used to invoke the driver, to determine
|
||
|
|
// the installed path. We do this manually, because we want to support that
|
||
|
|
// path being a symlink.
|
||
|
|
{
|
||
|
|
SmallString<128> InstalledPath(argv[0]);
|
||
|
|
|
||
|
|
// Do a PATH lookup, if there are no directory components.
|
||
|
|
if (llvm::sys::path::filename(InstalledPath) == InstalledPath) {
|
||
|
|
std::string Tmp = llvm::sys::FindProgramByName(
|
||
|
|
llvm::sys::path::filename(InstalledPath.str()));
|
||
|
|
if (!Tmp.empty())
|
||
|
|
InstalledPath = Tmp;
|
||
|
|
}
|
||
|
|
llvm::sys::fs::make_absolute(InstalledPath);
|
||
|
|
InstalledPath = llvm::sys::path::parent_path(InstalledPath);
|
||
|
|
bool exists;
|
||
|
|
if (!llvm::sys::fs::exists(InstalledPath.str(), exists) && exists)
|
||
|
|
TheDriver.setInstalledDir(InstalledPath);
|
||
|
|
}
|
||
|
|
|
||
|
|
llvm::InitializeAllTargets();
|
||
|
|
ParseProgName(argv, SavedStrings, TheDriver);
|
||
|
|
|
||
|
|
// 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 CC_PRINT_HEADERS and CC_PRINT_HEADERS_FILE.
|
||
|
|
TheDriver.CCPrintHeaders = !!::getenv("CC_PRINT_HEADERS");
|
||
|
|
if (TheDriver.CCPrintHeaders)
|
||
|
|
TheDriver.CCPrintHeadersFilename = ::getenv("CC_PRINT_HEADERS_FILE");
|
||
|
|
|
||
|
|
// Handle CC_LOG_DIAGNOSTICS and CC_LOG_DIAGNOSTICS_FILE.
|
||
|
|
TheDriver.CCLogDiagnostics = !!::getenv("CC_LOG_DIAGNOSTICS");
|
||
|
|
if (TheDriver.CCLogDiagnostics)
|
||
|
|
TheDriver.CCLogDiagnosticsFilename = ::getenv("CC_LOG_DIAGNOSTICS_FILE");
|
||
|
|
|
||
|
|
OwningPtr<Compilation> C(TheDriver.BuildCompilation(argv));
|
||
|
|
int Res = 0;
|
||
|
|
SmallVector<std::pair<int, const Command *>, 4> FailingCommands;
|
||
|
|
if (C.get())
|
||
|
|
Res = TheDriver.ExecuteCompilation(*C, FailingCommands);
|
||
|
|
|
||
|
|
// Force a crash to test the diagnostics.
|
||
|
|
if (::getenv("FORCE_CLANG_DIAGNOSTICS_CRASH")) {
|
||
|
|
Diags.Report(diag::err_drv_force_crash) << "FORCE_CLANG_DIAGNOSTICS_CRASH";
|
||
|
|
const Command *FailingCommand = 0;
|
||
|
|
FailingCommands.push_back(std::make_pair(-1, FailingCommand));
|
||
|
|
}
|
||
|
|
|
||
|
|
for (SmallVectorImpl< std::pair<int, const Command *> >::iterator it =
|
||
|
|
FailingCommands.begin(), ie = FailingCommands.end(); it != ie; ++it) {
|
||
|
|
int CommandRes = it->first;
|
||
|
|
const Command *FailingCommand = it->second;
|
||
|
|
if (!Res)
|
||
|
|
Res = CommandRes;
|
||
|
|
|
||
|
|
// If result status is < 0, then the driver command signalled an error.
|
||
|
|
// If result status is 70, then the driver command reported a fatal error.
|
||
|
|
// In these cases, generate additional diagnostic information if possible.
|
||
|
|
if (CommandRes < 0 || CommandRes == 70) {
|
||
|
|
TheDriver.generateCompilationDiagnostics(*C, FailingCommand);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// 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();
|
||
|
|
|
||
|
|
#ifdef _WIN32
|
||
|
|
// Exit status should not be negative on Win32, unless abnormal termination.
|
||
|
|
// Once abnormal termiation was caught, negative status should not be
|
||
|
|
// propagated.
|
||
|
|
if (Res < 0)
|
||
|
|
Res = 1;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// If we have multiple failing commands, we return the result of the first
|
||
|
|
// failing command.
|
||
|
|
return Res;
|
||
|
|
}
|