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117 lines
2.8 KiB
C++
117 lines
2.8 KiB
C++
//===- ErrorHandler.cpp ---------------------------------------------------===//
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//
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// The LLVM Linker
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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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#include "lld/Common/ErrorHandler.h"
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#include "lld/Common/Threads.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/raw_ostream.h"
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#include <mutex>
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#if !defined(_MSC_VER) && !defined(__MINGW32__)
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#include <unistd.h>
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#endif
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using namespace llvm;
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using namespace lld;
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// The functions defined in this file can be called from multiple threads,
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// but outs() or errs() are not thread-safe. We protect them using a mutex.
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static std::mutex Mu;
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// Prints "\n" or does nothing, depending on Msg contents of
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// the previous call of this function.
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static void newline(raw_ostream *ErrorOS, const Twine &Msg) {
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// True if the previous error message contained "\n".
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// We want to separate multi-line error messages with a newline.
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static bool Flag;
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if (Flag)
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*ErrorOS << "\n";
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Flag = StringRef(Msg.str()).contains('\n');
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}
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ErrorHandler &lld::errorHandler() {
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static ErrorHandler Handler;
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return Handler;
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}
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void lld::exitLld(int Val) {
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// Dealloc/destroy ManagedStatic variables before calling
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// _exit(). In a non-LTO build, this is a nop. In an LTO
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// build allows us to get the output of -time-passes.
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llvm_shutdown();
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outs().flush();
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errs().flush();
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_exit(Val);
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}
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void ErrorHandler::print(StringRef S, raw_ostream::Colors C) {
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*ErrorOS << LogName << ": ";
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if (ColorDiagnostics) {
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ErrorOS->changeColor(C, true);
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*ErrorOS << S;
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ErrorOS->resetColor();
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} else {
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*ErrorOS << S;
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}
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}
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void ErrorHandler::log(const Twine &Msg) {
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if (Verbose) {
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std::lock_guard<std::mutex> Lock(Mu);
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outs() << LogName << ": " << Msg << "\n";
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outs().flush();
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}
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}
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void ErrorHandler::message(const Twine &Msg) {
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std::lock_guard<std::mutex> Lock(Mu);
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outs() << Msg << "\n";
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outs().flush();
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}
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void ErrorHandler::warn(const Twine &Msg) {
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if (FatalWarnings) {
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error(Msg);
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return;
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}
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std::lock_guard<std::mutex> Lock(Mu);
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newline(ErrorOS, Msg);
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print("warning: ", raw_ostream::MAGENTA);
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*ErrorOS << Msg << "\n";
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}
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void ErrorHandler::error(const Twine &Msg) {
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std::lock_guard<std::mutex> Lock(Mu);
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newline(ErrorOS, Msg);
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if (ErrorLimit == 0 || ErrorCount < ErrorLimit) {
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print("error: ", raw_ostream::RED);
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*ErrorOS << Msg << "\n";
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} else if (ErrorCount == ErrorLimit) {
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print("error: ", raw_ostream::RED);
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*ErrorOS << ErrorLimitExceededMsg << "\n";
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if (ExitEarly)
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exitLld(1);
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}
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++ErrorCount;
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}
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void ErrorHandler::fatal(const Twine &Msg) {
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error(Msg);
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exitLld(1);
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}
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