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

244 lines
8.0 KiB
C++

//===-- 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/Driver/Options.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/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;
class DriverDiagnosticPrinter : public DiagnosticClient {
std::string ProgName;
llvm::raw_ostream &OS;
public:
DriverDiagnosticPrinter(const std::string _ProgName,
llvm::raw_ostream &_OS)
: ProgName(_ProgName),
OS(_OS) {}
virtual void HandleDiagnostic(Diagnostic::Level DiagLevel,
const DiagnosticInfo &Info);
};
void DriverDiagnosticPrinter::HandleDiagnostic(Diagnostic::Level Level,
const DiagnosticInfo &Info) {
OS << ProgName << ": ";
switch (Level) {
case Diagnostic::Ignored: assert(0 && "Invalid diagnostic type");
case Diagnostic::Note: OS << "note: "; break;
case Diagnostic::Warning: OS << "warning: "; break;
case Diagnostic::Error: OS << "error: "; break;
case Diagnostic::Fatal: OS << "fatal error: "; break;
}
llvm::SmallString<100> OutStr;
Info.FormatDiagnostic(OutStr);
OS.write(OutStr.begin(), OutStr.size());
OS << '\n';
}
llvm::sys::Path GetExecutablePath(const char *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,
const std::string &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/': Replace the literal argument XXX by 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.
void ApplyOneQAOverride(llvm::raw_ostream &OS,
std::vector<const char*> &Args,
const std::string &Edit,
std::set<std::string> &SavedStrings) {
// This does not need to be efficient.
if (Edit[0] == '^') {
const char *Str =
SaveStringInSet(SavedStrings, Edit.substr(1, std::string::npos));
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, std::string::npos));
OS << "### Adding argument " << Str << " at end\n";
Args.push_back(Str);
} 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));
} else {
OS << "### Unrecognized edit: " << Edit << "\n";
}
}
/// ApplyQAOverride - Apply a comma separate list of edits to the
/// input argument lists. See ApplyOneQAOverride.
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;
}
}
int main(int argc, const char **argv) {
llvm::sys::PrintStackTraceOnErrorSignal();
llvm::PrettyStackTraceProgram X(argc, argv);
llvm::sys::Path Path = GetExecutablePath(argv[0]);
DriverDiagnosticPrinter DiagClient(Path.getBasename(), llvm::errs());
Diagnostic Diags(&DiagClient);
Driver TheDriver(Path.getBasename().c_str(), Path.getDirname().c_str(),
llvm::sys::getHostTriple().c_str(),
"a.out", Diags);
llvm::OwningPtr<Compilation> C;
// 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);
llvm::llvm_shutdown();
return Res;
}