chromium/third_party/webrtc/rtc_base/checks.cc

/*
 *  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.

#include <cstdarg>
#include <cstdio>
#include <cstdlib>

#include "absl/strings/string_view.h"

#if defined(WEBRTC_ANDROID)
#define RTC_LOG_TAG_ANDROID …
#include <android/log.h>  // NOLINT
#endif

#if defined(WEBRTC_WIN)
#include <windows.h>
#endif

#if defined(WEBRTC_WIN)
#define LAST_SYSTEM_ERROR …
#elif defined(__native_client__) && __native_client__
#define LAST_SYSTEM_ERROR …
#elif defined(WEBRTC_POSIX)
#include <errno.h>
#define LAST_SYSTEM_ERROR …
#endif  // WEBRTC_WIN

#include "rtc_base/checks.h"

namespace {

#if defined(__GNUC__)
__attribute__((__format__(__printf__, 2, 3)))
#endif
void AppendFormat(std::string* s, const char* fmt, ...) { … }
}  // namespace

namespace rtc {
namespace webrtc_checks_impl {

#if !defined(WEBRTC_CHROMIUM_BUILD)
RTC_NORETURN void WriteFatalLog(absl::string_view output) {
#if defined(WEBRTC_ANDROID)
  std::string output_str(output);
  __android_log_print(ANDROID_LOG_ERROR, RTC_LOG_TAG_ANDROID, "%s\n",
                      output_str.c_str());
#endif
  fflush(stdout);
  fwrite(output.data(), output.size(), 1, stderr);
  fflush(stderr);
#if defined(WEBRTC_WIN)
  DebugBreak();
#endif
  abort();
}

RTC_NORETURN void WriteFatalLog(const char* file,
                                int line,
                                absl::string_view output) {
  WriteFatalLog(output);
}

#endif  // !defined(WEBRTC_CHROMIUM_BUILD)

#if RTC_CHECK_MSG_ENABLED
// Reads one argument from args, appends it to s and advances fmt.
// Returns true iff an argument was sucessfully parsed.
bool ParseArg(va_list* args, const CheckArgType** fmt, std::string* s) { … }

RTC_NORETURN void FatalLog(const char* file,
                           int line,
                           const char* message,
                           const CheckArgType* fmt,
                           ...) { … }
#else  // RTC_CHECK_MSG_ENABLED
RTC_NORETURN void FatalLog(const char* file, int line) {
  std::string s;
  AppendFormat(&s,
               "\n\n"
               "#\n"
               "# Fatal error in: %s, line %d\n"
               "# last system error: %u\n"
               "# Check failed.\n"
               "# ",
               file, line, LAST_SYSTEM_ERROR);
  WriteFatalLog(file, line, s);
}
#endif  // RTC_CHECK_MSG_ENABLED

#if RTC_DCHECK_IS_ON

RTC_NORETURN void UnreachableCodeReached(const char* file, int line) { … }

#else  // !RTC_DCHECK_IS_ON

RTC_NORETURN void UnreachableCodeReached() {
  std::string s;
  AppendFormat(&s,
               "\n\n"
               "#\n"
               "# Unreachable code reached (file and line unknown)\n"
               "# last system error: %u\n"
               "# ",
               LAST_SYSTEM_ERROR);
  WriteFatalLog(s);
}

#endif  // !RTC_DCHECK_IS_ON

}  // namespace webrtc_checks_impl
}  // namespace rtc

// Function to call from the C version of the RTC_CHECK and RTC_DCHECK macros.
RTC_NORETURN void rtc_FatalMessage(const char* file,
                                   int line,
                                   const char* msg) { … }