third_party/crashpad/client/simulate_crash_mac_test.cc - cobalt - Git at Google

 // 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 "client/simulate_crash.h"

 #include <mach/mach.h>
 #include <string.h>
 #include <sys/types.h>

 #include "base/macros.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "build/build_config.h"
 #include "gtest/gtest.h"
 #include "test/mac/mach_errors.h"
 #include "test/mac/mach_multiprocess.h"
 #include "util/mach/exc_server_variants.h"
 #include "util/mach/exception_behaviors.h"
 #include "util/mach/exception_ports.h"
 #include "util/mach/mach_extensions.h"
 #include "util/mach/mach_message.h"
 #include "util/mach/mach_message_server.h"
 #include "util/mach/symbolic_constants_mach.h"
 #include "util/misc/implicit_cast.h"

 namespace crashpad {
 namespace test {
 namespace {

 class TestSimulateCrashMac final : public MachMultiprocess,
                                    public UniversalMachExcServer::Interface {
  public:
   // Defines which targets the child should set an EXC_CRASH exception handler
   // for.
   enum ExceptionPortsTarget {
     // The child should clear its EXC_CRASH handler for both its task and thread
     // targets. SimulateCrash() will attempt to deliver the exception to the
     // host target, which will fail if not running as root. In any case, the
     // parent should not expect to receive any exception message from the child.
     kExceptionPortsTargetNone = 0,

     // The child will set an EXC_CRASH handler for its task target, and clear it
     // for its thread target. The parent runs an exception server to receive
     // the child’s simulated crash message.
     kExceptionPortsTargetTask,

     // The child will set an EXC_CRASH handler for its thread target, and clear
     // it for its task target. The parent runs an exception server to receive
     // the child’s simulated crash message.
     kExceptionPortsTargetThread,

     // The child sets an EXC_CRASH handler for both its task and thread targets.
     // The parent runs an exception server to receive the message expected to be
     // delivered to the thread target, but returns an error code. The child will
     // then fall back to trying the server registered for the task target,
     // sending a second message to the parent. The server in the parent will
     // handle this one successfully.
     kExceptionPortsTargetBoth,
   };

   TestSimulateCrashMac(ExceptionPortsTarget target,
                        exception_behavior_t behavior,
                        thread_state_flavor_t flavor)
       : MachMultiprocess(),
         UniversalMachExcServer::Interface(),
         target_(target),
         behavior_(behavior),
         flavor_(flavor),
         succeed_(true) {
   }

   ~TestSimulateCrashMac() {}

   // UniversalMachExcServer::Interface:
   kern_return_t CatchMachException(exception_behavior_t behavior,
                                    exception_handler_t exception_port,
                                    thread_t thread,
                                    task_t task,
                                    exception_type_t exception,
                                    const mach_exception_data_type_t* code,
                                    mach_msg_type_number_t code_count,
                                    thread_state_flavor_t* flavor,
                                    ConstThreadState old_state,
                                    mach_msg_type_number_t old_state_count,
                                    thread_state_t new_state,
                                    mach_msg_type_number_t* new_state_count,
                                    const mach_msg_trailer_t* trailer,
                                    bool* destroy_complex_request) override {
     *destroy_complex_request = true;

     // Check the entire exception message, because most or all of it was
     // generated by SimulateCrash() instead of the kernel.

     EXPECT_EQ(behavior, behavior_);
     EXPECT_EQ(exception_port, LocalPort());
     if (ExceptionBehaviorHasIdentity(behavior)) {
       EXPECT_NE(thread, THREAD_NULL);
       EXPECT_EQ(task, ChildTask());
     } else {
       EXPECT_EQ(thread, THREAD_NULL);
       EXPECT_EQ(task, TASK_NULL);
     }
     EXPECT_EQ(exception, kMachExceptionSimulated);
     EXPECT_EQ(code_count, 2u);
     if (code_count >= 1) {
       EXPECT_EQ(code[0], 0);
     }
     if (code_count >= 2) {
       EXPECT_EQ(code[1], 0);
     }
     if (!ExceptionBehaviorHasState(behavior)) {
       EXPECT_EQ(*flavor, THREAD_STATE_NONE);
     } else {
       EXPECT_EQ(*flavor, flavor_);
       switch (*flavor) {
 #if defined(ARCH_CPU_X86_FAMILY)
         case x86_THREAD_STATE: {
           EXPECT_EQ(old_state_count, x86_THREAD_STATE_COUNT);
           const x86_thread_state* state =
               reinterpret_cast<const x86_thread_state*>(old_state);
           switch (state->tsh.flavor) {
             case x86_THREAD_STATE32:
               EXPECT_EQ(implicit_cast<uint32_t>(state->tsh.count),
                         implicit_cast<uint32_t>(x86_THREAD_STATE32_COUNT));
               break;
             case x86_THREAD_STATE64:
               EXPECT_EQ(implicit_cast<uint32_t>(state->tsh.count),
                         implicit_cast<uint32_t>(x86_THREAD_STATE64_COUNT));
               break;
             default:
               ADD_FAILURE() << "unexpected tsh.flavor " << state->tsh.flavor;
               break;
           }
           break;
         }
         case x86_FLOAT_STATE: {
           EXPECT_EQ(old_state_count, x86_FLOAT_STATE_COUNT);
           const x86_float_state* state =
               reinterpret_cast<const x86_float_state*>(old_state);
           switch (state->fsh.flavor) {
             case x86_FLOAT_STATE32:
               EXPECT_EQ(implicit_cast<uint32_t>(state->fsh.count),
                         implicit_cast<uint32_t>(x86_FLOAT_STATE32_COUNT));
               break;
             case x86_FLOAT_STATE64:
               EXPECT_EQ(implicit_cast<uint32_t>(state->fsh.count),
                         implicit_cast<uint32_t>(x86_FLOAT_STATE64_COUNT));
               break;
             default:
               ADD_FAILURE() << "unexpected fsh.flavor " << state->fsh.flavor;
               break;
           }
           break;
         }
         case x86_DEBUG_STATE: {
           EXPECT_EQ(old_state_count, x86_DEBUG_STATE_COUNT);
           const x86_debug_state* state =
               reinterpret_cast<const x86_debug_state*>(old_state);
           switch (state->dsh.flavor) {
             case x86_DEBUG_STATE32:
               EXPECT_EQ(implicit_cast<uint32_t>(state->dsh.count),
                         implicit_cast<uint32_t>(x86_DEBUG_STATE32_COUNT));
               break;
             case x86_DEBUG_STATE64:
               EXPECT_EQ(implicit_cast<uint32_t>(state->dsh.count),
                         implicit_cast<uint32_t>(x86_DEBUG_STATE64_COUNT));
               break;
             default:
               ADD_FAILURE() << "unexpected dsh.flavor " << state->dsh.flavor;
               break;
           }
           break;
         }
         case x86_THREAD_STATE32:
           EXPECT_EQ(old_state_count, x86_THREAD_STATE32_COUNT);
           break;
         case x86_FLOAT_STATE32:
           EXPECT_EQ(old_state_count, x86_FLOAT_STATE32_COUNT);
           break;
         case x86_DEBUG_STATE32:
           EXPECT_EQ(old_state_count, x86_DEBUG_STATE32_COUNT);
           break;
         case x86_THREAD_STATE64:
           EXPECT_EQ(old_state_count, x86_THREAD_STATE64_COUNT);
           break;
         case x86_FLOAT_STATE64:
           EXPECT_EQ(old_state_count, x86_FLOAT_STATE64_COUNT);
           break;
         case x86_DEBUG_STATE64:
           EXPECT_EQ(old_state_count, x86_DEBUG_STATE64_COUNT);
           break;
 #else
 #error Port to your CPU architecture
 #endif
         default:
           ADD_FAILURE() << "unexpected flavor " << *flavor;
           break;
       }

       // Attempt to set a garbage thread state, which would cause the child to
       // crash inside SimulateCrash() if it actually succeeded. This tests that
       // SimulateCrash() ignores new_state instead of attempting to set the
       // state as the kernel would do. This operates in conjunction with the
       // |true| argument to ExcServerSuccessfulReturnValue() below.
       *new_state_count = old_state_count;
       size_t new_state_size = sizeof(natural_t) * old_state_count;
       memset(new_state, 0xa5, new_state_size);
     }

     if (!succeed_) {
       // The client has registered EXC_CRASH handlers for both its thread and
       // task targets, and sent a simulated exception message to its
       // thread-level EXC_CRASH handler. To test that it will fall back to
       // trying the task-level EXC_CRASH handler, return a failure code, which
       // should cause SimulateCrash() to try the next target.
       EXPECT_EQ(target_, kExceptionPortsTargetBoth);
       return KERN_ABORTED;
     }

     ExcServerCopyState(
         behavior, old_state, old_state_count, new_state, new_state_count);

     return ExcServerSuccessfulReturnValue(exception, behavior, true);
   }

  private:
   // MachMultiprocess:

   void MachMultiprocessParent() override {
     if (target_ == kExceptionPortsTargetNone) {
       // The child does not have any EXC_CRASH handlers registered for its
       // thread or task targets, so no exception message is expected to be
       // generated. Don’t run the server at all.
       return;
     }

     UniversalMachExcServer universal_mach_exc_server(this);

     mach_msg_return_t mr;
     if (target_ == kExceptionPortsTargetBoth) {
       // The client has registered EXC_CRASH handlers for both its thread and
       // task targets. Run a server that will return a failure code when the
       // exception message is sent to the thread target, which will cause the
       // client to fall back to the task target and send another message.
       succeed_ = false;
       mr = MachMessageServer::Run(&universal_mach_exc_server,
                                   LocalPort(),
                                   MACH_MSG_OPTION_NONE,
                                   MachMessageServer::kOneShot,
                                   MachMessageServer::kReceiveLargeError,
                                   kMachMessageTimeoutWaitIndefinitely);
       EXPECT_EQ(mr, MACH_MSG_SUCCESS)
           << MachErrorMessage(mr, "MachMessageServer::Run");
     }

     succeed_ = true;
     mr = MachMessageServer::Run(&universal_mach_exc_server,
                                 LocalPort(),
                                 MACH_MSG_OPTION_NONE,
                                 MachMessageServer::kOneShot,
                                 MachMessageServer::kReceiveLargeError,
                                 kMachMessageTimeoutWaitIndefinitely);
     EXPECT_EQ(mr, MACH_MSG_SUCCESS)
         << MachErrorMessage(mr, "MachMessageServer::Run");
   }

   void MachMultiprocessChild() override {
     bool task_valid = target_ == kExceptionPortsTargetTask ||
                       target_ == kExceptionPortsTargetBoth;
     ExceptionPorts task_exception_ports(ExceptionPorts::kTargetTypeTask,
                                         TASK_NULL);
     ASSERT_TRUE(task_exception_ports.SetExceptionPort(
         EXC_MASK_CRASH,
         task_valid ? RemotePort() : MACH_PORT_NULL,
         behavior_,
         flavor_));

     bool thread_valid = target_ == kExceptionPortsTargetThread ||
                         target_ == kExceptionPortsTargetBoth;
     ExceptionPorts thread_exception_ports(ExceptionPorts::kTargetTypeThread,
                                           THREAD_NULL);
     ASSERT_TRUE(thread_exception_ports.SetExceptionPort(
         EXC_MASK_CRASH,
         thread_valid ? RemotePort() : MACH_PORT_NULL,
         behavior_,
         flavor_));

     CRASHPAD_SIMULATE_CRASH();
   }

   ExceptionPortsTarget target_;
   exception_behavior_t behavior_;
   thread_state_flavor_t flavor_;
   bool succeed_;

   DISALLOW_COPY_AND_ASSIGN(TestSimulateCrashMac);
 };

 TEST(SimulateCrash, SimulateCrash) {
   static constexpr TestSimulateCrashMac::ExceptionPortsTarget kTargets[] = {
       TestSimulateCrashMac::kExceptionPortsTargetNone,
       TestSimulateCrashMac::kExceptionPortsTargetTask,
       TestSimulateCrashMac::kExceptionPortsTargetThread,
       TestSimulateCrashMac::kExceptionPortsTargetBoth,
   };

   static constexpr exception_behavior_t kBehaviors[] = {
       EXCEPTION_DEFAULT,
       EXCEPTION_STATE,
       EXCEPTION_STATE_IDENTITY,
       EXCEPTION_DEFAULT | kMachExceptionCodes,
       EXCEPTION_STATE | kMachExceptionCodes,
       EXCEPTION_STATE_IDENTITY | kMachExceptionCodes,
   };

   static constexpr thread_state_flavor_t kFlavors[] = {
 #if defined(ARCH_CPU_X86_FAMILY)
       x86_THREAD_STATE,
       x86_FLOAT_STATE,
       x86_DEBUG_STATE,
 #if defined(ARCH_CPU_X86)
       x86_THREAD_STATE32,
       x86_FLOAT_STATE32,
       x86_DEBUG_STATE32,
 #elif defined(ARCH_CPU_X86_64)
       x86_THREAD_STATE64,
       x86_FLOAT_STATE64,
       x86_DEBUG_STATE64,
 #endif
 #else
 #error Port to your CPU architecture
 #endif
   };

   for (size_t target_index = 0; target_index < base::size(kTargets);
        ++target_index) {
     TestSimulateCrashMac::ExceptionPortsTarget target = kTargets[target_index];
     SCOPED_TRACE(base::StringPrintf(
         "target_index %zu, target %d", target_index, target));

     for (size_t behavior_index = 0; behavior_index < base::size(kBehaviors);
          ++behavior_index) {
       exception_behavior_t behavior = kBehaviors[behavior_index];
       SCOPED_TRACE(base::StringPrintf(
           "behavior_index %zu, behavior %s",
           behavior_index,
           ExceptionBehaviorToString(behavior, kUseFullName | kUnknownIsNumeric)
               .c_str()));

       if (!ExceptionBehaviorHasState(behavior)) {
         TestSimulateCrashMac test_simulate_crash_mac(
             target, behavior, THREAD_STATE_NONE);
         test_simulate_crash_mac.Run();
       } else {
         for (size_t flavor_index = 0; flavor_index < base::size(kFlavors);
              ++flavor_index) {
           thread_state_flavor_t flavor = kFlavors[flavor_index];
           SCOPED_TRACE(base::StringPrintf(
               "flavor_index %zu, flavor %s",
               flavor_index,
               ThreadStateFlavorToString(
                   flavor, kUseFullName | kUnknownIsNumeric).c_str()));

           TestSimulateCrashMac test_simulate_crash_mac(
               target, behavior, flavor);
           test_simulate_crash_mac.Run();
         }
       }
     }
   }
 }

 }  // namespace
 }  // namespace test
 }  // namespace crashpad
	// 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 "client/simulate_crash.h"

	#include <mach/mach.h>
	#include <string.h>
	#include <sys/types.h>

	#include "base/macros.h"
	#include "base/stl_util.h"
	#include "base/strings/stringprintf.h"
	#include "build/build_config.h"
	#include "gtest/gtest.h"
	#include "test/mac/mach_errors.h"
	#include "test/mac/mach_multiprocess.h"
	#include "util/mach/exc_server_variants.h"
	#include "util/mach/exception_behaviors.h"
	#include "util/mach/exception_ports.h"
	#include "util/mach/mach_extensions.h"
	#include "util/mach/mach_message.h"
	#include "util/mach/mach_message_server.h"
	#include "util/mach/symbolic_constants_mach.h"
	#include "util/misc/implicit_cast.h"

	namespace crashpad {
	namespace test {
	namespace {

	class TestSimulateCrashMac final : public MachMultiprocess,
	public UniversalMachExcServer::Interface {
	public:
	// Defines which targets the child should set an EXC_CRASH exception handler
	// for.
	enum ExceptionPortsTarget {
	// The child should clear its EXC_CRASH handler for both its task and thread
	// targets. SimulateCrash() will attempt to deliver the exception to the
	// host target, which will fail if not running as root. In any case, the
	// parent should not expect to receive any exception message from the child.
	kExceptionPortsTargetNone = 0,

	// The child will set an EXC_CRASH handler for its task target, and clear it
	// for its thread target. The parent runs an exception server to receive
	// the child’s simulated crash message.
	kExceptionPortsTargetTask,

	// The child will set an EXC_CRASH handler for its thread target, and clear
	// it for its task target. The parent runs an exception server to receive
	// the child’s simulated crash message.
	kExceptionPortsTargetThread,

	// The child sets an EXC_CRASH handler for both its task and thread targets.
	// The parent runs an exception server to receive the message expected to be
	// delivered to the thread target, but returns an error code. The child will
	// then fall back to trying the server registered for the task target,
	// sending a second message to the parent. The server in the parent will
	// handle this one successfully.
	kExceptionPortsTargetBoth,
	};

	TestSimulateCrashMac(ExceptionPortsTarget target,
	exception_behavior_t behavior,
	thread_state_flavor_t flavor)
	: MachMultiprocess(),
	UniversalMachExcServer::Interface(),
	target_(target),
	behavior_(behavior),
	flavor_(flavor),
	succeed_(true) {
	}

	~TestSimulateCrashMac() {}

	// UniversalMachExcServer::Interface:
	kern_return_t CatchMachException(exception_behavior_t behavior,
	exception_handler_t exception_port,
	thread_t thread,
	task_t task,
	exception_type_t exception,
	const mach_exception_data_type_t* code,
	mach_msg_type_number_t code_count,
	thread_state_flavor_t* flavor,
	ConstThreadState old_state,
	mach_msg_type_number_t old_state_count,
	thread_state_t new_state,
	mach_msg_type_number_t* new_state_count,
	const mach_msg_trailer_t* trailer,
	bool* destroy_complex_request) override {
	*destroy_complex_request = true;

	// Check the entire exception message, because most or all of it was
	// generated by SimulateCrash() instead of the kernel.

	EXPECT_EQ(behavior, behavior_);
	EXPECT_EQ(exception_port, LocalPort());
	if (ExceptionBehaviorHasIdentity(behavior)) {
	EXPECT_NE(thread, THREAD_NULL);
	EXPECT_EQ(task, ChildTask());
	} else {
	EXPECT_EQ(thread, THREAD_NULL);
	EXPECT_EQ(task, TASK_NULL);
	}
	EXPECT_EQ(exception, kMachExceptionSimulated);
	EXPECT_EQ(code_count, 2u);
	if (code_count >= 1) {
	EXPECT_EQ(code[0], 0);
	}
	if (code_count >= 2) {
	EXPECT_EQ(code[1], 0);
	}
	if (!ExceptionBehaviorHasState(behavior)) {
	EXPECT_EQ(*flavor, THREAD_STATE_NONE);
	} else {
	EXPECT_EQ(*flavor, flavor_);
	switch (*flavor) {
	#if defined(ARCH_CPU_X86_FAMILY)
	case x86_THREAD_STATE: {
	EXPECT_EQ(old_state_count, x86_THREAD_STATE_COUNT);
	const x86_thread_state* state =
	reinterpret_cast<const x86_thread_state*>(old_state);
	switch (state->tsh.flavor) {
	case x86_THREAD_STATE32:
	EXPECT_EQ(implicit_cast<uint32_t>(state->tsh.count),
	implicit_cast<uint32_t>(x86_THREAD_STATE32_COUNT));
	break;
	case x86_THREAD_STATE64:
	EXPECT_EQ(implicit_cast<uint32_t>(state->tsh.count),
	implicit_cast<uint32_t>(x86_THREAD_STATE64_COUNT));
	break;
	default:
	ADD_FAILURE() << "unexpected tsh.flavor " << state->tsh.flavor;
	break;
	}
	break;
	}
	case x86_FLOAT_STATE: {
	EXPECT_EQ(old_state_count, x86_FLOAT_STATE_COUNT);
	const x86_float_state* state =
	reinterpret_cast<const x86_float_state*>(old_state);
	switch (state->fsh.flavor) {
	case x86_FLOAT_STATE32:
	EXPECT_EQ(implicit_cast<uint32_t>(state->fsh.count),
	implicit_cast<uint32_t>(x86_FLOAT_STATE32_COUNT));
	break;
	case x86_FLOAT_STATE64:
	EXPECT_EQ(implicit_cast<uint32_t>(state->fsh.count),
	implicit_cast<uint32_t>(x86_FLOAT_STATE64_COUNT));
	break;
	default:
	ADD_FAILURE() << "unexpected fsh.flavor " << state->fsh.flavor;
	break;
	}
	break;
	}
	case x86_DEBUG_STATE: {
	EXPECT_EQ(old_state_count, x86_DEBUG_STATE_COUNT);
	const x86_debug_state* state =
	reinterpret_cast<const x86_debug_state*>(old_state);
	switch (state->dsh.flavor) {
	case x86_DEBUG_STATE32:
	EXPECT_EQ(implicit_cast<uint32_t>(state->dsh.count),
	implicit_cast<uint32_t>(x86_DEBUG_STATE32_COUNT));
	break;
	case x86_DEBUG_STATE64:
	EXPECT_EQ(implicit_cast<uint32_t>(state->dsh.count),
	implicit_cast<uint32_t>(x86_DEBUG_STATE64_COUNT));
	break;
	default:
	ADD_FAILURE() << "unexpected dsh.flavor " << state->dsh.flavor;
	break;
	}
	break;
	}
	case x86_THREAD_STATE32:
	EXPECT_EQ(old_state_count, x86_THREAD_STATE32_COUNT);
	break;
	case x86_FLOAT_STATE32:
	EXPECT_EQ(old_state_count, x86_FLOAT_STATE32_COUNT);
	break;
	case x86_DEBUG_STATE32:
	EXPECT_EQ(old_state_count, x86_DEBUG_STATE32_COUNT);
	break;
	case x86_THREAD_STATE64:
	EXPECT_EQ(old_state_count, x86_THREAD_STATE64_COUNT);
	break;
	case x86_FLOAT_STATE64:
	EXPECT_EQ(old_state_count, x86_FLOAT_STATE64_COUNT);
	break;
	case x86_DEBUG_STATE64:
	EXPECT_EQ(old_state_count, x86_DEBUG_STATE64_COUNT);
	break;
	#else
	#error Port to your CPU architecture
	#endif
	default:
	ADD_FAILURE() << "unexpected flavor " << *flavor;
	break;
	}

	// Attempt to set a garbage thread state, which would cause the child to
	// crash inside SimulateCrash() if it actually succeeded. This tests that
	// SimulateCrash() ignores new_state instead of attempting to set the
	// state as the kernel would do. This operates in conjunction with the
	// \|true\| argument to ExcServerSuccessfulReturnValue() below.
	*new_state_count = old_state_count;
	size_t new_state_size = sizeof(natural_t) * old_state_count;
	memset(new_state, 0xa5, new_state_size);
	}

	if (!succeed_) {
	// The client has registered EXC_CRASH handlers for both its thread and
	// task targets, and sent a simulated exception message to its
	// thread-level EXC_CRASH handler. To test that it will fall back to
	// trying the task-level EXC_CRASH handler, return a failure code, which
	// should cause SimulateCrash() to try the next target.
	EXPECT_EQ(target_, kExceptionPortsTargetBoth);
	return KERN_ABORTED;
	}

	ExcServerCopyState(
	behavior, old_state, old_state_count, new_state, new_state_count);

	return ExcServerSuccessfulReturnValue(exception, behavior, true);
	}

	private:
	// MachMultiprocess:

	void MachMultiprocessParent() override {
	if (target_ == kExceptionPortsTargetNone) {
	// The child does not have any EXC_CRASH handlers registered for its
	// thread or task targets, so no exception message is expected to be
	// generated. Don’t run the server at all.
	return;
	}

	UniversalMachExcServer universal_mach_exc_server(this);

	mach_msg_return_t mr;
	if (target_ == kExceptionPortsTargetBoth) {
	// The client has registered EXC_CRASH handlers for both its thread and
	// task targets. Run a server that will return a failure code when the
	// exception message is sent to the thread target, which will cause the
	// client to fall back to the task target and send another message.
	succeed_ = false;
	mr = MachMessageServer::Run(&universal_mach_exc_server,
	LocalPort(),
	MACH_MSG_OPTION_NONE,
	MachMessageServer::kOneShot,
	MachMessageServer::kReceiveLargeError,
	kMachMessageTimeoutWaitIndefinitely);
	EXPECT_EQ(mr, MACH_MSG_SUCCESS)
	<< MachErrorMessage(mr, "MachMessageServer::Run");
	}

	succeed_ = true;
	mr = MachMessageServer::Run(&universal_mach_exc_server,
	LocalPort(),
	MACH_MSG_OPTION_NONE,
	MachMessageServer::kOneShot,
	MachMessageServer::kReceiveLargeError,
	kMachMessageTimeoutWaitIndefinitely);
	EXPECT_EQ(mr, MACH_MSG_SUCCESS)
	<< MachErrorMessage(mr, "MachMessageServer::Run");
	}

	void MachMultiprocessChild() override {
	bool task_valid = target_ == kExceptionPortsTargetTask \|\|
	target_ == kExceptionPortsTargetBoth;
	ExceptionPorts task_exception_ports(ExceptionPorts::kTargetTypeTask,
	TASK_NULL);
	ASSERT_TRUE(task_exception_ports.SetExceptionPort(
	EXC_MASK_CRASH,
	task_valid ? RemotePort() : MACH_PORT_NULL,
	behavior_,
	flavor_));

	bool thread_valid = target_ == kExceptionPortsTargetThread \|\|
	target_ == kExceptionPortsTargetBoth;
	ExceptionPorts thread_exception_ports(ExceptionPorts::kTargetTypeThread,
	THREAD_NULL);
	ASSERT_TRUE(thread_exception_ports.SetExceptionPort(
	EXC_MASK_CRASH,
	thread_valid ? RemotePort() : MACH_PORT_NULL,
	behavior_,
	flavor_));

	CRASHPAD_SIMULATE_CRASH();
	}

	ExceptionPortsTarget target_;
	exception_behavior_t behavior_;
	thread_state_flavor_t flavor_;
	bool succeed_;

	DISALLOW_COPY_AND_ASSIGN(TestSimulateCrashMac);
	};

	TEST(SimulateCrash, SimulateCrash) {
	static constexpr TestSimulateCrashMac::ExceptionPortsTarget kTargets[] = {
	TestSimulateCrashMac::kExceptionPortsTargetNone,
	TestSimulateCrashMac::kExceptionPortsTargetTask,
	TestSimulateCrashMac::kExceptionPortsTargetThread,
	TestSimulateCrashMac::kExceptionPortsTargetBoth,
	};

	static constexpr exception_behavior_t kBehaviors[] = {
	EXCEPTION_DEFAULT,
	EXCEPTION_STATE,
	EXCEPTION_STATE_IDENTITY,
	EXCEPTION_DEFAULT \| kMachExceptionCodes,
	EXCEPTION_STATE \| kMachExceptionCodes,
	EXCEPTION_STATE_IDENTITY \| kMachExceptionCodes,
	};

	static constexpr thread_state_flavor_t kFlavors[] = {
	#if defined(ARCH_CPU_X86_FAMILY)
	x86_THREAD_STATE,
	x86_FLOAT_STATE,
	x86_DEBUG_STATE,
	#if defined(ARCH_CPU_X86)
	x86_THREAD_STATE32,
	x86_FLOAT_STATE32,
	x86_DEBUG_STATE32,
	#elif defined(ARCH_CPU_X86_64)
	x86_THREAD_STATE64,
	x86_FLOAT_STATE64,
	x86_DEBUG_STATE64,
	#endif
	#else
	#error Port to your CPU architecture
	#endif
	};

	for (size_t target_index = 0; target_index < base::size(kTargets);
	++target_index) {
	TestSimulateCrashMac::ExceptionPortsTarget target = kTargets[target_index];
	SCOPED_TRACE(base::StringPrintf(
	"target_index %zu, target %d", target_index, target));

	for (size_t behavior_index = 0; behavior_index < base::size(kBehaviors);
	++behavior_index) {
	exception_behavior_t behavior = kBehaviors[behavior_index];
	SCOPED_TRACE(base::StringPrintf(
	"behavior_index %zu, behavior %s",
	behavior_index,
	ExceptionBehaviorToString(behavior, kUseFullName \| kUnknownIsNumeric)
	.c_str()));

	if (!ExceptionBehaviorHasState(behavior)) {
	TestSimulateCrashMac test_simulate_crash_mac(
	target, behavior, THREAD_STATE_NONE);
	test_simulate_crash_mac.Run();
	} else {
	for (size_t flavor_index = 0; flavor_index < base::size(kFlavors);
	++flavor_index) {
	thread_state_flavor_t flavor = kFlavors[flavor_index];
	SCOPED_TRACE(base::StringPrintf(
	"flavor_index %zu, flavor %s",
	flavor_index,
	ThreadStateFlavorToString(
	flavor, kUseFullName \| kUnknownIsNumeric).c_str()));

	TestSimulateCrashMac test_simulate_crash_mac(
	target, behavior, flavor);
	test_simulate_crash_mac.Run();
	}
	}
	}
	}
	}

	} // namespace
	} // namespace test
	} // namespace crashpad