Add exc_server_variants including UniversalMachExcServer and its test

util/test/mac/mach_multiprocess.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/test/mac/mach_multiprocess.h"
 
 #include <AvailabilityMacros.h>
 #include <bsm/libbsm.h>
 #include <servers/bootstrap.h>
 
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
 #include "base/mac/scoped_mach_port.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/rand_util.h"
 #include "gtest/gtest.h"
 #include "util/mach/bootstrap.h"
+#include "util/mach/mach_extensions.h"
 #include "util/misc/scoped_forbid_return.h"
 #include "util/test/errors.h"
 #include "util/test/mac/mach_errors.h"
 
 namespace {
 
 // The “hello” message contains a send right to the child process’ task port.
 struct SendHelloMessage : public mach_msg_base_t {
   mach_msg_port_descriptor_t port_descriptor;
 };
@@ skipping 58 matching lines @@
 
   mach_port_t local_port;
   kern_return_t kr =
       BootstrapCheckIn(bootstrap_port, info_->service_name, &local_port);
   ASSERT_EQ(BOOTSTRAP_SUCCESS, kr)
       << BootstrapErrorMessage(kr, "bootstrap_check_in");
   info_->local_port.reset(local_port);
 }
 
 mach_port_t MachMultiprocess::LocalPort() const {
-  EXPECT_NE(static_cast<mach_port_t>(MACH_PORT_NULL), info_->local_port);
+  EXPECT_NE(kMachPortNull, info_->local_port);
   return info_->local_port;
 }
 
 mach_port_t MachMultiprocess::RemotePort() const {
-  EXPECT_NE(static_cast<mach_port_t>(MACH_PORT_NULL), info_->remote_port);
+  EXPECT_NE(kMachPortNull, info_->remote_port);
   return info_->remote_port;
 }
 
 mach_port_t MachMultiprocess::ChildTask() const {
-  EXPECT_NE(static_cast<mach_port_t>(MACH_PORT_NULL), info_->child_task);
+  EXPECT_NE(kMachPortNull, info_->child_task);
   return info_->child_task;
 }
 
 void MachMultiprocess::MultiprocessParent() {
   ReceiveHelloMessage message = {};
 
   kern_return_t kr =
       mach_msg(&message.header,
                MACH_RCV_MSG | MACH_RCV_TRAILER_TYPE(MACH_MSG_TRAILER_FORMAT_0) |
                    MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_AUDIT),
@@ skipping 134 matching lines @@
   if (Test::HasFailure()) {
     // Trigger the ScopedForbidReturn destructor.
     return;
   }
 
   forbid_return.Disarm();
 }
 
 }  // namespace test
 }  // namespace crashpad