crashpad/util/fuchsia/scoped_task_suspend.cc

// Copyright 2018 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/fuchsia/scoped_task_suspend.h"

#include <lib/zx/time.h>

#include <vector>

#include "base/fuchsia/fuchsia_logging.h"
#include "base/logging.h"
#include "util/fuchsia/koid_utilities.h"

namespace crashpad {

ScopedTaskSuspend::ScopedTaskSuspend(const zx::process& process) {
  DCHECK_NE(process.get(), zx::process::self()->get());

  zx_status_t status = process.suspend(&suspend_token_);
  if (status != ZX_OK) {
    ZX_LOG(ERROR, status) << "zx_task_suspend";
  } else {
    for (const auto& thread : GetThreadHandles(process)) {
      zx_signals_t observed = 0u;
      status = thread.wait_one(
          ZX_THREAD_SUSPENDED, zx::deadline_after(zx::msec(50)), &observed);
      ZX_LOG_IF(ERROR, status != ZX_OK, status) << "thread failed to suspend";
    }
  }
}

}  // namespace crashpad