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 <syslog.h>
16extern "C" void android_set_abort_message(const char* msg);
17#endif // __BIONIC__
18
19#if defined(__APPLE__) && __has_include(<CrashReporterClient.h>)
20#   include <CrashReporterClient.h>
21#   define _LIBCXXABI_USE_CRASHREPORTER_CLIENT
22#endif
23
24void __abort_message(const char* format, ...)
25{
26    // Write message to stderr. We do this before formatting into a
27    // variable-size buffer so that we still get some information if
28    // formatting into the variable-sized buffer fails.
29#if !defined(NDEBUG) || !defined(LIBCXXABI_BAREMETAL)
30    {
31        fprintf(stderr, "libc++abi: ");
32        va_list list;
33        va_start(list, format);
34        vfprintf(stderr, format, list);
35        va_end(list);
36        fprintf(stderr, "\n");
37    }
38#endif
39
40    // Format the arguments into an allocated buffer. We leak the buffer on
41    // purpose, since we're about to abort() anyway.
42#if defined(_LIBCXXABI_USE_CRASHREPORTER_CLIENT)
43    char* buffer;
44    va_list list;
45    va_start(list, format);
46    vasprintf(&buffer, format, list);
47    va_end(list);
48
49    CRSetCrashLogMessage(buffer);
50#elif defined(__BIONIC__)
51    char* buffer;
52    va_list list;
53    va_start(list, format);
54    vasprintf(&buffer, format, list);
55    va_end(list);
56
57    // Show error in tombstone.
58    android_set_abort_message(buffer);
59
60    // Show error in logcat.
61    openlog("libc++abi", 0, 0);
62    syslog(LOG_CRIT, "%s", buffer);
63    closelog();
64#endif // __BIONIC__
65
66    abort();
67}