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92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
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// Copyright 2018 The Crashpad Authors. All rights reserved.
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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/fuchsia/scoped_task_suspend.h"
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#include <zircon/process.h>
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#include <zircon/syscalls.h>
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#include <vector>
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#include "base/fuchsia/fuchsia_logging.h"
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#include "base/fuchsia/scoped_zx_handle.h"
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#include "base/logging.h"
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#include "util/fuchsia/koid_utilities.h"
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namespace crashpad {
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namespace {
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zx_obj_type_t GetHandleType(zx_handle_t handle) {
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zx_info_handle_basic_t basic;
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zx_status_t status = zx_object_get_info(
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handle, ZX_INFO_HANDLE_BASIC, &basic, sizeof(basic), nullptr, nullptr);
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if (status != ZX_OK) {
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ZX_LOG(ERROR, status) << "zx_object_get_info";
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return ZX_OBJ_TYPE_NONE;
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}
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return basic.type;
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}
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bool SuspendThread(zx_handle_t thread) {
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zx_status_t status = zx_task_suspend(thread);
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ZX_LOG_IF(ERROR, status != ZX_OK, status) << "zx_task_suspend";
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return status == ZX_OK;
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}
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bool ResumeThread(zx_handle_t thread) {
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zx_status_t status = zx_task_resume(thread, 0);
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ZX_LOG_IF(ERROR, status != ZX_OK, status) << "zx_task_resume";
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return status == ZX_OK;
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}
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} // namespace
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ScopedTaskSuspend::ScopedTaskSuspend(zx_handle_t task) : task_(task) {
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DCHECK_NE(task_, zx_process_self());
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DCHECK_NE(task_, zx_thread_self());
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zx_obj_type_t type = GetHandleType(task_);
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if (type == ZX_OBJ_TYPE_THREAD) {
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if (!SuspendThread(task_)) {
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task_ = ZX_HANDLE_INVALID;
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}
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} else if (type == ZX_OBJ_TYPE_PROCESS) {
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for (const auto& thread : GetChildHandles(task_, ZX_INFO_PROCESS_THREADS)) {
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SuspendThread(thread.get());
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}
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} else {
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LOG(ERROR) << "unexpected handle type";
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task_ = ZX_HANDLE_INVALID;
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}
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}
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ScopedTaskSuspend::~ScopedTaskSuspend() {
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if (task_ != ZX_HANDLE_INVALID) {
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zx_obj_type_t type = GetHandleType(task_);
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if (type == ZX_OBJ_TYPE_THREAD) {
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ResumeThread(task_);
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} else if (type == ZX_OBJ_TYPE_PROCESS) {
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for (const auto& thread :
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GetChildHandles(task_, ZX_INFO_PROCESS_THREADS)) {
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ResumeThread(thread.get());
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}
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} else {
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LOG(ERROR) << "unexpected handle type";
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}
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}
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}
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} // namespace crashpad
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