1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
4 /* This Source Code Form is subject to the terms of the Mozilla Public
5 * License, v. 2.0. If a copy of the MPL was not distributed with this
6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
8 #include "mozilla/mozalloc_abort.h"
11 # include <android/log.h>
13 #ifdef MOZ_WIDGET_ANDROID
20 #include "mozilla/Assertions.h"
21 #include "mozilla/Sprintf.h"
23 void mozalloc_abort(const char* const msg
) {
28 __android_log_print(ANDROID_LOG_ERROR
, "Gecko", "mozalloc_abort: %s", msg
);
30 #ifdef MOZ_WIDGET_ANDROID
31 abortThroughJava(msg
);
36 #ifdef MOZ_WIDGET_ANDROID
38 void fillAbortMessage(char (&msg
)[N
], uintptr_t retAddress
) {
40 * On Android, we often don't have reliable backtrace when crashing inside
41 * abort(). Therefore, we try to find out who is calling abort() and add
42 * that to the message.
45 dladdr(reinterpret_cast<void*>(retAddress
), &info
);
47 const char* const module
= info
.dli_fname
? info
.dli_fname
: "";
48 const char* const base_module
= strrchr(module
, '/');
49 const void* const module_offset
=
50 reinterpret_cast<void*>(retAddress
- uintptr_t(info
.dli_fbase
));
51 const char* const sym
= info
.dli_sname
? info
.dli_sname
: "";
53 SprintfLiteral(msg
, "abort() called from %s:%p (%s)",
54 base_module
? base_module
+ 1 : module
, module_offset
, sym
);
58 #if defined(XP_UNIX) && !defined(MOZ_ASAN) && !defined(MOZ_TSAN)
59 // Define abort() here, so that it is used instead of the system abort(). This
60 // lets us control the behavior when aborting, in order to get better results
61 // on *NIX platforms. See mozalloc_abort for details.
63 // For AddressSanitizer, we must not redefine system abort because the ASan
64 // option "abort_on_error=1" calls abort() and therefore causes the following
65 // call chain with our redefined abort:
67 // ASan -> abort() -> moz_abort() -> MOZ_CRASH() -> Segmentation fault
69 // That segmentation fault will be interpreted as another bug by ASan and as a
70 // result, ASan will just exit(1) instead of aborting.
72 // The same applies to ThreadSanitizer when run with "halt_on_error=1" in
73 // combination with "abort_on_error=1".
74 extern "C" void abort(void) {
75 # ifdef MOZ_WIDGET_ANDROID
77 fillAbortMessage(msg
, uintptr_t(__builtin_return_address(0)));
79 const char* const msg
= "Redirecting call to abort() to mozalloc_abort\n";
84 // We won't reach here because mozalloc_abort() is MOZ_NORETURN. But that
85 // annotation isn't used on ARM (see mozalloc_abort.h for why) so we add a
86 // redundant MOZ_CRASH() here to avoid a "'noreturn' function does return"