mac: Add CrashpadClient::UseSystemDefaultHandler()

util/mach/mach_extensions.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #include "util/mach/mach_extensions.h"
 
 #include <AvailabilityMacros.h>
 #include <pthread.h>
+#include <servers/bootstrap.h>
 
 #include "base/mac/mach_logging.h"
 #include "util/mac/mac_util.h"
 
 namespace crashpad {
 
 thread_t MachThreadSelf() {
   // The pthreads library keeps its own copy of the thread port. Using it does
   // not increment its reference count.
   return pthread_mach_thread_np(pthread_self());
@@ skipping 60 matching lines @@
     return kExcMaskValid_10_6;
   }
 #endif
 
   // 10.11 added EXC_MASK_CORPSE_NOTIFY. See 10.11 <mach/exception_types.h>.
   const exception_mask_t kExcMaskValid_10_11 =
       kExcMaskValid_10_6 | EXC_MASK_CORPSE_NOTIFY;
   return kExcMaskValid_10_11;
 }
 
+base::mac::ScopedMachSendRight SystemCrashReporterHandler() {
+  const char kSystemCrashReporterServiceName[] = "com.apple.ReportCrash";
+  exception_handler_t system_crash_reporter_handler;
+  kern_return_t kr = bootstrap_look_up(bootstrap_port,
+                                       kSystemCrashReporterServiceName,
+                                       &system_crash_reporter_handler);
+  if (kr != BOOTSTRAP_SUCCESS) {
+    BOOTSTRAP_LOG(ERROR, kr) << "bootstrap_look_up "
+                             << kSystemCrashReporterServiceName;
+    system_crash_reporter_handler = MACH_PORT_NULL;
+  }
+
+  return base::mac::ScopedMachSendRight(system_crash_reporter_handler);
+}
+
 }  // namespace crashpad