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
29void 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}
80