os_crash_dumps.cc revision 3f50c38dc070f4bb515c1b64450dae14f316474e 
1// Copyright (c) 2010 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/mac/os_crash_dumps.h"
6
7#include <signal.h>
8#include <unistd.h>
9
10#include "base/basictypes.h"
11
12namespace base {
13namespace mac {
14
15namespace {
16
17void ExitSignalHandler(int sig) {
18  // A call to exit() can call atexit() handlers.  If we SIGSEGV due
19  // to a corrupt heap, and if we have an atexit handler that
20  // allocates or frees memory, we are in trouble if we do not _exit.
21  _exit(128 + sig);
22}
23
24}  // namespace
25
26void DisableOSCrashDumps() {
27  // These are the POSIX signals corresponding to the Mach exceptions that
28  // Apple Crash Reporter handles.  See ux_exception() in xnu's
29  // bsd/uxkern/ux_exception.c and machine_exception() in xnu's
30  // bsd/dev/*/unix_signal.c.
31  const int signals_to_intercept[] = {
32    SIGILL,   // EXC_BAD_INSTRUCTION
33    SIGTRAP,  // EXC_BREAKPOINT
34    SIGFPE,   // EXC_ARITHMETIC
35    SIGBUS,   // EXC_BAD_ACCESS
36    SIGSEGV   // EXC_BAD_ACCESS
37  };
38
39  // For all these signals, just wire things up so we exit immediately.
40  for (size_t i = 0; i < arraysize(signals_to_intercept); ++i)
41    signal(signals_to_intercept[i], ExitSignalHandler);
42}
43
44}  // namespace mac
45}  // namespace base
46