Line data    Source code

       1             : /*
       2             :  *  Copyright 2006 The WebRTC Project Authors. All rights reserved.
       3             :  *
       4             :  *  Use of this source code is governed by a BSD-style license
       5             :  *  that can be found in the LICENSE file in the root of the source
       6             :  *  tree. An additional intellectual property rights grant can be found
       7             :  *  in the file PATENTS.  All contributing project authors may
       8             :  *  be found in the AUTHORS file in the root of the source tree.
       9             :  */
      10             : 
      11             : // Most of this was borrowed (with minor modifications) from V8's and Chromium's
      12             : // src/base/logging.cc.
      13             : 
      14             : // Use the C++ version to provide __GLIBCXX__.
      15             : #include <cstdarg>
      16             : #include <cstdio>
      17             : #include <cstdlib>
      18             : 
      19             : #if defined(__GLIBC__) && !defined(__UCLIBC__)
      20             : #include <cxxabi.h>
      21             : #include <execinfo.h>
      22             : #endif
      23             : 
      24             : #if defined(WEBRTC_ANDROID)
      25             : #define RTC_LOG_TAG "rtc"
      26             : #include <android/log.h>  // NOLINT
      27             : #endif
      28             : 
      29             : #if defined(WEBRTC_WIN)
      30             : #include <windows.h>
      31             : #endif
      32             : 
      33             : #include "webrtc/base/checks.h"
      34             : #include "webrtc/base/logging.h"
      35             : 
      36             : #if defined(_MSC_VER)
      37             : // Warning C4722: destructor never returns, potential memory leak.
      38             : // FatalMessage's dtor very intentionally aborts.
      39             : #pragma warning(disable:4722)
      40             : #endif
      41             : 
      42             : namespace rtc {
      43             : 
      44           0 : void VPrintError(const char* format, va_list args) {
      45             : #if defined(WEBRTC_ANDROID)
      46             :   __android_log_vprint(ANDROID_LOG_ERROR, RTC_LOG_TAG, format, args);
      47             : #else
      48           0 :   vfprintf(stderr, format, args);
      49             : #endif
      50           0 : }
      51             : 
      52           0 : void PrintError(const char* format, ...) {
      53             :   va_list args;
      54           0 :   va_start(args, format);
      55           0 :   VPrintError(format, args);
      56           0 :   va_end(args);
      57           0 : }
      58             : 
      59             : // TODO(ajm): This works on Mac (although the parsing fails) but I don't seem
      60             : // to get usable symbols on Linux. This is copied from V8. Chromium has a more
      61             : // advanced stace trace system; also more difficult to copy.
      62           0 : void DumpBacktrace() {
      63             : #if defined(__GLIBC__) && !defined(__UCLIBC__)
      64             :   void* trace[100];
      65           0 :   int size = backtrace(trace, sizeof(trace) / sizeof(*trace));
      66           0 :   char** symbols = backtrace_symbols(trace, size);
      67           0 :   PrintError("\n==== C stack trace ===============================\n\n");
      68           0 :   if (size == 0) {
      69           0 :     PrintError("(empty)\n");
      70           0 :   } else if (symbols == NULL) {
      71           0 :     PrintError("(no symbols)\n");
      72             :   } else {
      73           0 :     for (int i = 1; i < size; ++i) {
      74             :       char mangled[201];
      75           0 :       if (sscanf(symbols[i], "%*[^(]%*[(]%200[^)+]", mangled) == 1) {  // NOLINT
      76           0 :         PrintError("%2d: ", i);
      77             :         int status;
      78             :         size_t length;
      79           0 :         char* demangled = abi::__cxa_demangle(mangled, NULL, &length, &status);
      80           0 :         PrintError("%s\n", demangled != NULL ? demangled : mangled);
      81           0 :         free(demangled);
      82             :       } else {
      83             :         // If parsing failed, at least print the unparsed symbol.
      84           0 :         PrintError("%s\n", symbols[i]);
      85             :       }
      86             :     }
      87             :   }
      88           0 :   free(symbols);
      89             : #endif
      90           0 : }
      91             : 
      92           0 : FatalMessage::FatalMessage(const char* file, int line) {
      93           0 :   Init(file, line);
      94           0 : }
      95             : 
      96           0 : FatalMessage::FatalMessage(const char* file, int line, std::string* result) {
      97           0 :   Init(file, line);
      98           0 :   stream_ << "Check failed: " << *result << std::endl << "# ";
      99           0 :   delete result;
     100           0 : }
     101             : 
     102           0 : NO_RETURN FatalMessage::~FatalMessage() {
     103           0 :   fflush(stdout);
     104           0 :   fflush(stderr);
     105           0 :   stream_ << std::endl << "#" << std::endl;
     106           0 :   PrintError(stream_.str().c_str());
     107           0 :   DumpBacktrace();
     108           0 :   fflush(stderr);
     109           0 :   abort();
     110             : }
     111             : 
     112           0 : void FatalMessage::Init(const char* file, int line) {
     113           0 :   stream_ << std::endl << std::endl
     114           0 :           << "#" << std::endl
     115           0 :           << "# Fatal error in " << file << ", line " << line << std::endl
     116           0 :           << "# last system error: " << LAST_SYSTEM_ERROR << std::endl
     117           0 :           << "# ";
     118           0 : }
     119             : 
     120             : // MSVC doesn't like complex extern templates and DLLs.
     121             : #if !defined(COMPILER_MSVC)
     122             : // Explicit instantiations for commonly used comparisons.
     123             : template std::string* MakeCheckOpString<int, int>(
     124             :     const int&, const int&, const char* names);
     125             : template std::string* MakeCheckOpString<unsigned long, unsigned long>(
     126             :     const unsigned long&, const unsigned long&, const char* names);
     127             : template std::string* MakeCheckOpString<unsigned long, unsigned int>(
     128             :     const unsigned long&, const unsigned int&, const char* names);
     129             : template std::string* MakeCheckOpString<unsigned int, unsigned long>(
     130             :     const unsigned int&, const unsigned long&, const char* names);
     131             : template std::string* MakeCheckOpString<std::string, std::string>(
     132             :     const std::string&, const std::string&, const char* name);
     133             : #endif
     134             : 
     135             : }  // namespace rtc
     136             : 
     137             : // Function to call from the C version of the RTC_CHECK and RTC_DCHECK macros.
     138           0 : NO_RETURN void rtc_FatalMessage(const char* file, int line, const char* msg) {
     139           0 :   rtc::FatalMessage(file, line).stream() << msg;
     140             : }