libcxxabi/src/abort_message.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include <stdlib.h>
  10 #include <stdio.h>
  11 #include <stdarg.h>
  12 #include "abort_message.h"
  13
  14 #ifdef __BIONIC__
  15 #   include <android/api-level.h>
  16 #   if __ANDROID_API__ >= 21
  17 #       include <syslog.h>
  18         extern "C" void android_set_abort_message(const char* msg);
  19 #   else
  20 #       include <assert.h>
  21 #   endif // __ANDROID_API__ >= 21
  22 #endif // __BIONIC__
  23
  24 #if defined(__APPLE__) && __has_include(<CrashReporterClient.h>)
  25 #   include <CrashReporterClient.h>
  26 #   define _LIBCXXABI_USE_CRASHREPORTER_CLIENT
  27 #endif
  28
  29 void abort_message(const char* format, ...)
  30 {
  31     // Write message to stderr. We do this before formatting into a
  32     // variable-size buffer so that we still get some information if
  33     // formatting into the variable-sized buffer fails.
  34 #if !defined(NDEBUG) || !defined(LIBCXXABI_BAREMETAL)
  35     {
  36         fprintf(stderr, "libc++abi: ");
  37         va_list list;
  38         va_start(list, format);
  39         vfprintf(stderr, format, list);
  40         va_end(list);
  41         fprintf(stderr, "\n");
  42     }
  43 #endif
  44
  45     // Format the arguments into an allocated buffer. We leak the buffer on
  46     // purpose, since we're about to abort() anyway.
  47 #if defined(_LIBCXXABI_USE_CRASHREPORTER_CLIENT)
  48     char* buffer;
  49     va_list list;
  50     va_start(list, format);
  51     vasprintf(&buffer, format, list);
  52     va_end(list);
  53
  54     CRSetCrashLogMessage(buffer);
  55 #elif defined(__BIONIC__)
  56     char* buffer;
  57     va_list list;
  58     va_start(list, format);
  59     vasprintf(&buffer, format, list);
  60     va_end(list);
  61
  62 #   if __ANDROID_API__ >= 21
  63     // Show error in tombstone.
  64     android_set_abort_message(buffer);
  65
  66     // Show error in logcat.
  67     openlog("libc++abi", 0, 0);
  68     syslog(LOG_CRIT, "%s", buffer);
  69     closelog();
  70 #   else
  71     // The good error reporting wasn't available in Android until L. Since we're
  72     // about to abort anyway, just call __assert2, which will log _somewhere_
  73     // (tombstone and/or logcat) in older releases.
  74     __assert2(__FILE__, __LINE__, __func__, buffer);
  75 #   endif // __ANDROID_API__ >= 21
  76 #endif // __BIONIC__
  77
  78     abort();
  79 }