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//===- Error.cpp ----------------------------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Error.h"
#include "Config.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/raw_ostream.h"
#include <mutex>
#if !defined(_MSC_VER) && !defined(__MINGW32__)
#include <unistd.h>
#endif
using namespace llvm;
using namespace lld;
using namespace lld::elf;
uint64_t elf::ErrorCount;
raw_ostream *elf::ErrorOS;
// The functions defined in this file can be called from multiple threads,
// but outs() or errs() are not thread-safe. We protect them using a mutex.
static std::mutex Mu;
// Prints "\n" or does nothing, depending on Msg contents of
// the previous call of this function.
static void newline(const Twine &Msg) {
// True if the previous error message contained "\n".
// We want to separate multi-line error messages with a newline.
static bool Flag;
if (Flag)
*ErrorOS << "\n";
Flag = (StringRef(Msg.str()).find('\n') != StringRef::npos);
}
static void print(StringRef S, raw_ostream::Colors C) {
*ErrorOS << Config->Argv[0] << ": ";
if (Config->ColorDiagnostics) {
ErrorOS->changeColor(C, true);
*ErrorOS << S;
ErrorOS->resetColor();
} else {
*ErrorOS << S;
}
}
void elf::log(const Twine &Msg) {
if (Config->Verbose) {
std::lock_guard<std::mutex> Lock(Mu);
outs() << Config->Argv[0] << ": " << Msg << "\n";
outs().flush();
}
}
void elf::message(const Twine &Msg) {
std::lock_guard<std::mutex> Lock(Mu);
outs() << Msg << "\n";
outs().flush();
}
void elf::warn(const Twine &Msg) {
if (Config->FatalWarnings) {
error(Msg);
return;
}
std::lock_guard<std::mutex> Lock(Mu);
newline(Msg);
print("warning: ", raw_ostream::MAGENTA);
*ErrorOS << Msg << "\n";
}
void elf::error(const Twine &Msg) {
std::lock_guard<std::mutex> Lock(Mu);
newline(Msg);
if (Config->ErrorLimit == 0 || ErrorCount < Config->ErrorLimit) {
print("error: ", raw_ostream::RED);
*ErrorOS << Msg << "\n";
} else if (ErrorCount == Config->ErrorLimit) {
print("error: ", raw_ostream::RED);
*ErrorOS << "too many errors emitted, stopping now"
<< " (use -error-limit=0 to see all errors)\n";
if (Config->ExitEarly)
exitLld(1);
}
++ErrorCount;
}
void elf::exitLld(int Val) {
// Dealloc/destroy ManagedStatic variables before calling
// _exit(). In a non-LTO build, this is a nop. In an LTO
// build allows us to get the output of -time-passes.
llvm_shutdown();
outs().flush();
errs().flush();
_exit(Val);
}
void elf::fatal(const Twine &Msg) {
error(Msg);
exitLld(1);
}
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