mac: Add CrashpadClient::UseSystemDefaultHandler()

handler/mac/crash_report_exception_handler.cc

 // Copyright 2015 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 "handler/mac/crash_report_exception_handler.h"
 
-#include <servers/bootstrap.h>
-
 #include <vector>
 
 #include "base/logging.h"
 #include "base/mac/mach_logging.h"
+#include "base/mac/scoped_mach_port.h"
 #include "base/strings/stringprintf.h"
 #include "client/settings.h"
 #include "minidump/minidump_file_writer.h"
 #include "snapshot/crashpad_info_client_options.h"
 #include "snapshot/mac/process_snapshot_mac.h"
 #include "util/file/file_writer.h"
 #include "util/mach/exc_client_variants.h"
 #include "util/mach/exception_behaviors.h"
 #include "util/mach/exception_types.h"
 #include "util/mach/mach_extensions.h"
@@ skipping 162 matching lines @@
     // receive under normal conditions. Although the system crash reporter is
     // able to deal with other exceptions including simulated ones, forwarding
     // them to the system crash reporter could present the system’s crash UI for
     // processes that haven’t actually crashed, and could result in reports not
     // actually associated with crashes being sent to the operating system
     // vendor.
     //
     // Note that normally, EXC_RESOURCE and EXC_GUARD exceptions are sent to the
     // system-level com.apple.ReportCrash.Root job, and not to the user-level
     // job that they are forwarded to here.
-    mach_port_t system_crash_reporter_port;
-    const char kSystemCrashReporterServiceName[] = "com.apple.ReportCrash";
-    kern_return_t kr = bootstrap_look_up(bootstrap_port,
-                                         kSystemCrashReporterServiceName,
-                                         &system_crash_reporter_port);
-    if (kr != BOOTSTRAP_SUCCESS) {
-      BOOTSTRAP_LOG(ERROR, kr) << "bootstrap_look_up "
-                               << kSystemCrashReporterServiceName;
-    } else {
+    base::mac::ScopedMachSendRight
+        system_crash_reporter_handler(SystemCrashReporterHandler());
+    if (system_crash_reporter_handler) {
       // Make copies of mutable out parameters so that the system crash reporter
       // can’t influence the state returned by this method.
       thread_state_flavor_t flavor_forward = *flavor;
       mach_msg_type_number_t new_state_forward_count = *new_state_count;
       std::vector<natural_t> new_state_forward(
           new_state, new_state + new_state_forward_count);
 
       // The system crash reporter requires the behavior to be
       // EXCEPTION_STATE_IDENTITY | MACH_EXCEPTION_CODES. It uses the identity
       // parameters but doesn’t appear to use the state parameters, including
       // |flavor|, and doesn’t care if they are 0 or invalid. As long as an
       // identity is available (checked above), any other exception behavior is
       // converted to what the system crash reporter wants, with the caveat that
       // problems may arise if the state wasn’t available and the system crash
       // reporter changes in the future to use it. However, normally, the state
       // will be available.
-      kr = UniversalExceptionRaise(
+      kern_return_t kr = UniversalExceptionRaise(
           EXCEPTION_STATE_IDENTITY | MACH_EXCEPTION_CODES,
-          system_crash_reporter_port,
+          system_crash_reporter_handler,
           thread,
           task,
           exception,
           code,
           code_count,
           &flavor_forward,
           old_state,
           old_state_count,
           new_state_forward_count ? &new_state_forward[0] : nullptr,
           &new_state_forward_count);
-      MACH_LOG_IF(WARNING, kr != KERN_SUCCESS, kr)
-          << "UniversalExceptionRaise " << kSystemCrashReporterServiceName;
+      MACH_LOG_IF(WARNING, kr != KERN_SUCCESS, kr) << "UniversalExceptionRaise";
     }
   }
 
   ExcServerCopyState(
       behavior, old_state, old_state_count, new_state, new_state_count);
 
   return ExcServerSuccessfulReturnValue(exception, behavior, false);
 }
 
 }  // namespace crashpad