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 32void __libcpp_verbose_abort(char const* format, ...) { 33 // Write message to stderr. We do this before formatting into a 34 // buffer so that we still get some information out if that fails. 35 { 36 va_list list; 37 va_start(list, format); 38 std::vfprintf(stderr, format, list); 39 va_end(list); 40 } 41 42 // Format the arguments into an allocated buffer for CrashReport & friends. 43 // We leak the buffer on purpose, since we're about to abort() anyway. 44 char* buffer; (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