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 <syslog.h>
17extern "C" void android_set_abort_message(const char* msg);
18#endif // __BIONIC__
19
20#if defined(__APPLE__) && __has_include(<CrashReporterClient.h>)
21# include <CrashReporterClient.h>
22#endif
23
24_LIBCPP_BEGIN_NAMESPACE_STD
25
26_LIBCPP_WEAK void __libcpp_verbose_abort(char const* format, ...) noexcept {
27 // Write message to stderr. We do this before formatting into a
28 // buffer so that we still get some information out if that fails.
29 {
30 va_list list;
31 va_start(list, format);
32 std::vfprintf(stderr, format: format, arg: list);
33 va_end(list);
34 }
35
36 // Format the arguments into an allocated buffer for CrashReport & friends.
37 // We leak the buffer on purpose, since we're about to abort() anyway.
38 char* buffer;
39 (void)buffer;
40 va_list list;
41 va_start(list, format);
42
43#if defined(__APPLE__) && __has_include(<CrashReporterClient.h>)
44 // Note that we should technically synchronize accesses here (by e.g. taking a lock),
45 // however concretely we're only setting a pointer, so the likelihood of a race here
46 // is low.
47 vasprintf(&buffer, format, list);
48 CRSetCrashLogMessage(buffer);
49#elif defined(__BIONIC__)
50 vasprintf(&buffer, format, list);
51
52 // Show error in tombstone.
53 android_set_abort_message(buffer);
54
55 // Show error in logcat.
56 openlog("libc++", 0, 0);
57 syslog(LOG_CRIT, "%s", buffer);
58 closelog();
59#endif
60 va_end(list);
61
62 std::abort();
63}
64
65_LIBCPP_END_NAMESPACE_STD
66