58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/mac/os_crash_dumps.h"
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#include <signal.h>
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#include <unistd.h>
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#include "base/basictypes.h"
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#include "base/logging.h"
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namespace base {
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namespace mac {
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namespace {
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void ExitSignalHandler(int sig) {
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// A call to exit() can call atexit() handlers. If we SIGSEGV due
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// to a corrupt heap, and if we have an atexit handler that
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// allocates or frees memory, we are in trouble if we do not _exit.
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_exit(128 + sig);
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}
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} // namespace
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void DisableOSCrashDumps() {
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// These are the POSIX signals corresponding to the Mach exceptions that
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// Apple Crash Reporter handles. See ux_exception() in xnu's
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// bsd/uxkern/ux_exception.c and machine_exception() in xnu's
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// bsd/dev/*/unix_signal.c.
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const int signals_to_intercept[] = {
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SIGILL, // EXC_BAD_INSTRUCTION
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SIGTRAP, // EXC_BREAKPOINT
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SIGFPE, // EXC_ARITHMETIC
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SIGBUS, // EXC_BAD_ACCESS
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SIGSEGV // EXC_BAD_ACCESS
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};
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// For all these signals, just wire things up so we exit immediately.
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for (size_t i = 0; i < arraysize(signals_to_intercept); ++i) {
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struct sigaction act = {};
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act.sa_handler = ExitSignalHandler;
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// It is better to allow the signal handler to run on the stack
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// registered with sigaltstack(), if one is present.
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act.sa_flags = SA_ONSTACK;
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if (sigemptyset(&act.sa_mask) != 0)
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DLOG_ERRNO(FATAL) << "sigemptyset() failed";
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if (sigaction(signals_to_intercept[i], &act, NULL) != 0)
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DLOG_ERRNO(FATAL) << "sigaction() failed";
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}
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}
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} // namespace mac
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} // namespace base
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