Update Crashpad to 32981a3ee9d7c2769fb27afa038fe2e194cfa329

third_party/crashpad/crashpad/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,
@@ skipping 139 matching lines @@
   return kExcMaskValid_10_11;
 }
 
 base::mac::ScopedMachReceiveRight BootstrapCheckIn(
     const std::string& service_name) {
   return BootstrapCheckInOrLookUp<BootstrapCheckInTraits>(service_name);
 }
 
 base::mac::ScopedMachSendRight BootstrapLookUp(
     const std::string& service_name) {
-  return BootstrapCheckInOrLookUp<BootstrapLookUpTraits>(service_name);
+  base::mac::ScopedMachSendRight send(
+      BootstrapCheckInOrLookUp<BootstrapLookUpTraits>(service_name));
+
+  // It’s possible to race the bootstrap server when the receive right
+  // corresponding to the looked-up send right is destroyed immediately before
+  // the bootstrap_look_up() call. If the bootstrap server believes that
+  // |service_name| is still registered before processing the port-destroyed
+  // notification sent to it by the kernel, it will respond to a
+  // bootstrap_look_up() request with a send right that has become a dead name,
+  // which will be returned to the bootstrap_look_up() caller, translated into
+  // the caller’s IPC port name space, as the special MACH_PORT_DEAD port name.
+  // Check for that and return MACH_PORT_NULL in its place, as though the
+  // bootstrap server had fully processed the port-destroyed notification before
+  // responding to bootstrap_look_up().
+  if (send.get() == MACH_PORT_DEAD) {
+    LOG(ERROR) << "bootstrap_look_up " << service_name << ": service is dead";
+    send.reset();
+  }
+
+  return send;
 }
 
 base::mac::ScopedMachSendRight SystemCrashReporterHandler() {
   return BootstrapLookUp("com.apple.ReportCrash");
 }
 
 }  // namespace crashpad