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 <__config>
10#include <__verbose_abort>
11#include <cstdarg>
12#include <cstdio>
13#include <cstdlib>
14
15#ifdef __BIONIC__
16#  include <android/api-level.h>
17#  if __ANDROID_API__ >= 21
18#    include <syslog.h>
19extern "C" void android_set_abort_message(const char* msg);
20#  else
21#    include <assert.h>
22#  endif // __ANDROID_API__ >= 21
23#endif   // __BIONIC__
24
25#if defined(__APPLE__) && __has_include(<CrashReporterClient.h>)
26#  include <CrashReporterClient.h>
27#endif
28
29_LIBCPP_BEGIN_NAMESPACE_STD
30
31_LIBCPP_WEAK void __libcpp_verbose_abort(char const* format, ...) {
32  // Write message to stderr. We do this before formatting into a
33  // buffer so that we still get some information out if that fails.
34  {
35    va_list list;
36    va_start(list, format);
37    std::vfprintf(stderr, format, list);
38    va_end(list);
39  }
40
41  // Format the arguments into an allocated buffer for CrashReport & friends.
42  // We leak the buffer on purpose, since we're about to abort() anyway.
43  char* buffer;
44  (void)buffer;
45  va_list list;
46  va_start(list, format);
47
48#if defined(__APPLE__) && __has_include(<CrashReporterClient.h>)
49  // Note that we should technically synchronize accesses here (by e.g. taking a lock),
50  // however concretely we're only setting a pointer, so the likelihood of a race here
51  // is low.
52  vasprintf(&buffer, format, list);
53  CRSetCrashLogMessage(buffer);
54#elif defined(__BIONIC__)
55  vasprintf(&buffer, format, list);
56
57#  if __ANDROID_API__ >= 21
58  // Show error in tombstone.
59  android_set_abort_message(buffer);
60
61  // Show error in logcat.
62  openlog("libc++", 0, 0);
63  syslog(LOG_CRIT, "%s", buffer);
64  closelog();
65#  else
66  // The good error reporting wasn't available in Android until L. Since we're
67  // about to abort anyway, just call __assert2, which will log _somewhere_
68  // (tombstone and/or logcat) in older releases.
69  __assert2(__FILE__, __LINE__, __func__, buffer);
70#  endif // __ANDROID_API__ >= 21
71#endif
72  va_end(list);
73
74  std::abort();
75}
76
77_LIBCPP_END_NAMESPACE_STD
78