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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include "abort_message.h"
#ifdef __BIONIC__
# include <android/api-level.h>
# if __ANDROID_API__ >= 21
# include <syslog.h>
extern "C" void android_set_abort_message(const char* msg);
# else
# include <assert.h>
# endif // __ANDROID_API__ >= 21
#endif // __BIONIC__
#if defined(__APPLE__) && __has_include(<CrashReporterClient.h>)
# include <CrashReporterClient.h>
# define _LIBCXXABI_USE_CRASHREPORTER_CLIENT
#endif
void abort_message(const char* format, ...)
{
// Write message to stderr. We do this before formatting into a
// variable-size buffer so that we still get some information if
// formatting into the variable-sized buffer fails.
#if !defined(NDEBUG) || !defined(LIBCXXABI_BAREMETAL)
{
#if defined(__EMSCRIPTEN__) && defined(NDEBUG)
// Just trap in a non-debug build. These internal libcxxabi assertions are
// very rare, and it's not worth linking in vfprintf stdio support or
// even minimal logging for them, as we'll have a proper call stack, which
// will show a call into "abort_message", and can help debugging. (In a
// debug build that won't be inlined.)
abort();
#else
fprintf(stderr, "libc++abi: ");
va_list list;
va_start(list, format);
vfprintf(stderr, format, list);
va_end(list);
fprintf(stderr, "\n");
#endif
}
#endif
// Format the arguments into an allocated buffer. We leak the buffer on
// purpose, since we're about to abort() anyway.
#if defined(_LIBCXXABI_USE_CRASHREPORTER_CLIENT)
char* buffer;
va_list list;
va_start(list, format);
vasprintf(&buffer, format, list);
va_end(list);
CRSetCrashLogMessage(buffer);
#elif defined(__BIONIC__)
char* buffer;
va_list list;
va_start(list, format);
vasprintf(&buffer, format, list);
va_end(list);
# if __ANDROID_API__ >= 21
// Show error in tombstone.
android_set_abort_message(buffer);
// Show error in logcat.
openlog("libc++abi", 0, 0);
syslog(LOG_CRIT, "%s", buffer);
closelog();
# else
// The good error reporting wasn't available in Android until L. Since we're
// about to abort anyway, just call __assert2, which will log _somewhere_
// (tombstone and/or logcat) in older releases.
__assert2(__FILE__, __LINE__, __func__, buffer);
# endif // __ANDROID_API__ >= 21
#endif // __BIONIC__
abort();
}
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