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/*
* Copyright 2006 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
// Most of this was borrowed (with minor modifications) from V8's and Chromium's
// src/base/logging.cc.
// Use the C++ version to provide __GLIBCXX__.
#include <cstdarg>
#include <cstdio>
#include <cstdlib>
#if defined(__GLIBCXX__) && !defined(__UCLIBC__)
#include <cxxabi.h>
#include <execinfo.h>
#endif
#if defined(WEBRTC_ANDROID)
#define LOG_TAG "rtc"
#include <android/log.h> // NOLINT
#endif
#include "webrtc/base/checks.h"
#if defined(_MSC_VER)
// Warning C4722: destructor never returns, potential memory leak.
// FatalMessage's dtor very intentionally aborts.
#pragma warning(disable:4722)
#endif
namespace rtc {
void VPrintError(const char* format, va_list args) {
#if defined(WEBRTC_ANDROID)
__android_log_vprint(ANDROID_LOG_ERROR, LOG_TAG, format, args);
#else
vfprintf(stderr, format, args);
#endif
}
void PrintError(const char* format, ...) {
va_list args;
va_start(args, format);
VPrintError(format, args);
va_end(args);
}
// TODO(ajm): This works on Mac (although the parsing fails) but I don't seem
// to get usable symbols on Linux. This is copied from V8. Chromium has a more
// advanced stace trace system; also more difficult to copy.
void DumpBacktrace() {
#if defined(__GLIBCXX__) && !defined(__UCLIBC__)
void* trace[100];
int size = backtrace(trace, sizeof(trace) / sizeof(*trace));
char** symbols = backtrace_symbols(trace, size);
PrintError("\n==== C stack trace ===============================\n\n");
if (size == 0) {
PrintError("(empty)\n");
} else if (symbols == NULL) {
PrintError("(no symbols)\n");
} else {
for (int i = 1; i < size; ++i) {
char mangled[201];
if (sscanf(symbols[i], "%*[^(]%*[(]%200[^)+]", mangled) == 1) { // NOLINT
PrintError("%2d: ", i);
int status;
size_t length;
char* demangled = abi::__cxa_demangle(mangled, NULL, &length, &status);
PrintError("%s\n", demangled != NULL ? demangled : mangled);
free(demangled);
} else {
// If parsing failed, at least print the unparsed symbol.
PrintError("%s\n", symbols[i]);
}
}
}
free(symbols);
#endif
}
FatalMessage::FatalMessage(const char* file, int line) {
Init(file, line);
}
FatalMessage::FatalMessage(const char* file, int line, std::string* result) {
Init(file, line);
stream_ << "Check failed: " << *result << std::endl << "# ";
delete result;
}
NO_RETURN FatalMessage::~FatalMessage() {
fflush(stdout);
fflush(stderr);
stream_ << std::endl << "#" << std::endl;
PrintError(stream_.str().c_str());
DumpBacktrace();
fflush(stderr);
abort();
}
void FatalMessage::Init(const char* file, int line) {
stream_ << std::endl << std::endl << "#" << std::endl << "# Fatal error in "
<< file << ", line " << line << std::endl << "# ";
}
// MSVC doesn't like complex extern templates and DLLs.
#if !defined(COMPILER_MSVC)
// Explicit instantiations for commonly used comparisons.
template std::string* MakeCheckOpString<int, int>(
const int&, const int&, const char* names);
template std::string* MakeCheckOpString<unsigned long, unsigned long>(
const unsigned long&, const unsigned long&, const char* names);
template std::string* MakeCheckOpString<unsigned long, unsigned int>(
const unsigned long&, const unsigned int&, const char* names);
template std::string* MakeCheckOpString<unsigned int, unsigned long>(
const unsigned int&, const unsigned long&, const char* names);
template std::string* MakeCheckOpString<std::string, std::string>(
const std::string&, const std::string&, const char* name);
#endif
} // namespace rtc
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