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https://github.com/chromium/crashpad.git
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cd85c9f700
Chrome’s relauncher process needs a way to sever ties with the crashpad_handler instance running from the disk image in order to cause that instance to exit so that the disk image may be unmounted. This new function is otherwise not thought to be interesting, and its use is not recommended. This comes with a small refactoring to create a SystemCrashReporterHandler() function, and a fix for a minor port leak in CrashReportExceptionHandler::CatchMachException(). BUG=chromium:538373 R=rsesek@chromium.org Review URL: https://codereview.chromium.org/1375573005 .
116 lines
4.0 KiB
C++
116 lines
4.0 KiB
C++
// Copyright 2014 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/mach/mach_extensions.h"
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#include <AvailabilityMacros.h>
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#include <pthread.h>
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#include <servers/bootstrap.h>
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#include "base/mac/mach_logging.h"
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#include "util/mac/mac_util.h"
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namespace crashpad {
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thread_t MachThreadSelf() {
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// The pthreads library keeps its own copy of the thread port. Using it does
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// not increment its reference count.
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return pthread_mach_thread_np(pthread_self());
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}
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mach_port_t NewMachPort(mach_port_right_t right) {
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mach_port_t port = MACH_PORT_NULL;
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kern_return_t kr = mach_port_allocate(mach_task_self(), right, &port);
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MACH_LOG_IF(ERROR, kr != KERN_SUCCESS, kr) << "mach_port_allocate";
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return port;
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}
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exception_mask_t ExcMaskAll() {
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// This is necessary because of the way that the kernel validates
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// exception_mask_t arguments to
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// {host,task,thread}_{get,set,swap}_exception_ports(). It is strict,
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// rejecting attempts to operate on any bits that it does not recognize. See
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// 10.9.4 xnu-2422.110.17/osfmk/mach/ipc_host.c and
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// xnu-2422.110.17/osfmk/mach/ipc_tt.c.
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#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_9
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const int mac_os_x_minor_version = MacOSXMinorVersion();
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#endif
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// See 10.6.8 xnu-1504.15.3/osfmk/mach/exception_types.h. 10.7 uses the same
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// definition as 10.6. See 10.7.5 xnu-1699.32.7/osfmk/mach/exception_types.h
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const exception_mask_t kExcMaskAll_10_6 =
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EXC_MASK_BAD_ACCESS |
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EXC_MASK_BAD_INSTRUCTION |
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EXC_MASK_ARITHMETIC |
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EXC_MASK_EMULATION |
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EXC_MASK_SOFTWARE |
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EXC_MASK_BREAKPOINT |
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EXC_MASK_SYSCALL |
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EXC_MASK_MACH_SYSCALL |
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EXC_MASK_RPC_ALERT |
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EXC_MASK_MACHINE;
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#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_8
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if (mac_os_x_minor_version < 8) {
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return kExcMaskAll_10_6;
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}
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#endif
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// 10.8 added EXC_MASK_RESOURCE. See 10.8.5
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// xnu-2050.48.11/osfmk/mach/exception_types.h.
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const exception_mask_t kExcMaskAll_10_8 =
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kExcMaskAll_10_6 | EXC_MASK_RESOURCE;
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#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_9
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if (mac_os_x_minor_version < 9) {
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return kExcMaskAll_10_8;
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}
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#endif
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// 10.9 added EXC_MASK_GUARD. See 10.9.4
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// xnu-2422.110.17/osfmk/mach/exception_types.h.
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const exception_mask_t kExcMaskAll_10_9 = kExcMaskAll_10_8 | EXC_MASK_GUARD;
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return kExcMaskAll_10_9;
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}
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exception_mask_t ExcMaskValid() {
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const exception_mask_t kExcMaskValid_10_6 = ExcMaskAll() | EXC_MASK_CRASH;
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#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_11
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if (MacOSXMinorVersion() < 11) {
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return kExcMaskValid_10_6;
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}
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#endif
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// 10.11 added EXC_MASK_CORPSE_NOTIFY. See 10.11 <mach/exception_types.h>.
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const exception_mask_t kExcMaskValid_10_11 =
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kExcMaskValid_10_6 | EXC_MASK_CORPSE_NOTIFY;
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return kExcMaskValid_10_11;
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}
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base::mac::ScopedMachSendRight SystemCrashReporterHandler() {
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const char kSystemCrashReporterServiceName[] = "com.apple.ReportCrash";
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exception_handler_t system_crash_reporter_handler;
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kern_return_t kr = bootstrap_look_up(bootstrap_port,
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kSystemCrashReporterServiceName,
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&system_crash_reporter_handler);
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if (kr != BOOTSTRAP_SUCCESS) {
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BOOTSTRAP_LOG(ERROR, kr) << "bootstrap_look_up "
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<< kSystemCrashReporterServiceName;
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system_crash_reporter_handler = MACH_PORT_NULL;
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}
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return base::mac::ScopedMachSendRight(system_crash_reporter_handler);
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}
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} // namespace crashpad
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