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6265674c98
This was tested locally by adding "-Wunreachable-code-aggressive" after making NOTREACHED() [[noreturn]] in mini_chromium and then getting that to compile. Bug: chromium:40580068 Change-Id: I7ec1c72be1d73436d128660a621e9060eaebaee8 Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/5780891 Reviewed-by: Mark Mentovai <mark@chromium.org>
131 lines
4.8 KiB
C++
131 lines
4.8 KiB
C++
// Copyright 2014 The Crashpad Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/mach/exc_client_variants.h"
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#include <sys/types.h>
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#include <vector>
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#include "base/notreached.h"
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#include "util/mach/exc.h"
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#include "util/mach/mach_exc.h"
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namespace crashpad {
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kern_return_t UniversalExceptionRaise(exception_behavior_t behavior,
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exception_handler_t exception_port,
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thread_t thread,
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task_t task,
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exception_type_t exception,
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const mach_exception_data_type_t* code,
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mach_msg_type_number_t code_count,
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thread_state_flavor_t* flavor,
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ConstThreadState old_state,
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mach_msg_type_number_t old_state_count,
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thread_state_t new_state,
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mach_msg_type_number_t* new_state_count) {
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// This function is similar to 10.9.4 xnu-2422.110.17/osfmk/kern/exception.c
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// exception_deliver() as far as the delivery logic is concerned. Unlike
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// exception_deliver(), this function does not get or set thread states for
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// behavior values that require this, as that is left to the caller to do if
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// needed.
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std::vector<exception_data_type_t> small_code_vector;
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exception_data_t small_code = nullptr;
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if ((behavior & MACH_EXCEPTION_CODES) == 0 && code_count) {
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small_code_vector.reserve(code_count);
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for (size_t code_index = 0; code_index < code_count; ++code_index) {
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small_code_vector.push_back(code[code_index]);
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}
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small_code = &small_code_vector[0];
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}
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// The *exception_raise*() family has bad declarations. Their code and
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// old_state arguments aren’t pointers to const data, although they should be.
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// The generated stubs in excUser.c and mach_excUser.c make it clear that the
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// data is never modified, and these parameters could be declared with const
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// appropriately. The uses of const_cast below are thus safe.
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switch (behavior) {
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case EXCEPTION_DEFAULT:
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return exception_raise(
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exception_port, thread, task, exception, small_code, code_count);
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case EXCEPTION_STATE:
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return exception_raise_state(exception_port,
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exception,
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small_code,
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code_count,
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flavor,
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const_cast<thread_state_t>(old_state),
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old_state_count,
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new_state,
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new_state_count);
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case EXCEPTION_STATE_IDENTITY:
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return exception_raise_state_identity(
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exception_port,
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thread,
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task,
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exception,
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small_code,
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code_count,
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flavor,
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const_cast<thread_state_t>(old_state),
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old_state_count,
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new_state,
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new_state_count);
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case EXCEPTION_DEFAULT | kMachExceptionCodes:
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return mach_exception_raise(exception_port,
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thread,
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task,
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exception,
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const_cast<mach_exception_data_type_t*>(code),
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code_count);
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case EXCEPTION_STATE | kMachExceptionCodes:
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return mach_exception_raise_state(
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exception_port,
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exception,
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const_cast<mach_exception_data_type_t*>(code),
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code_count,
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flavor,
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const_cast<thread_state_t>(old_state),
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old_state_count,
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new_state,
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new_state_count);
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case EXCEPTION_STATE_IDENTITY | kMachExceptionCodes:
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return mach_exception_raise_state_identity(
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exception_port,
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thread,
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task,
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exception,
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const_cast<mach_exception_data_type_t*>(code),
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code_count,
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flavor,
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const_cast<thread_state_t>(old_state),
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old_state_count,
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new_state,
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new_state_count);
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default:
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NOTREACHED();
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}
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}
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} // namespace crashpad
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