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> 19 extern "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 32 void __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