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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "chrome/common/process_watcher.h"
#include "base/message_loop.h"
#include "chrome/app/result_codes.h"
#include "chrome/common/env_util.h"
#include "chrome/common/env_vars.h"
// Maximum amount of time (in milliseconds) to wait for the process to exit.
static const int kWaitInterval = 2000;
namespace {
class TimerExpiredTask : public Task, public MessageLoop::Watcher {
public:
explicit TimerExpiredTask(ProcessHandle process) : process_(process) {
MessageLoop::current()->WatchObject(process_, this);
}
virtual ~TimerExpiredTask() {
if (process_) {
KillProcess();
DCHECK(!process_) << "Make sure to close the handle.";
}
}
// Task ---------------------------------------------------------------------
virtual void Run() {
if (process_)
KillProcess();
}
// MessageLoop::Watcher -----------------------------------------------------
virtual void OnObjectSignaled(HANDLE object) {
if (MessageLoop::current()) {
// When we're called from our destructor, the message loop is in the
// process of being torn down. Only touch the message loop if it is
// still running.
MessageLoop::current()->WatchObject(process_, NULL); // Stop watching.
}
CloseHandle(process_);
process_ = NULL;
}
private:
void KillProcess() {
if (env_util::HasEnvironmentVariable(env_vars::kHeadless)) {
// If running the distributed tests, give the renderer a little time to figure out
// that the channel is shutdown and unwind.
if (WaitForSingleObject(process_, kWaitInterval) == WAIT_OBJECT_0) {
OnObjectSignaled(process_);
return;
}
}
// OK, time to get frisky. We don't actually care when the process
// terminates. We just care that it eventually terminates, and that's what
// TerminateProcess should do for us. Don't check for the result code since
// it fails quite often. This should be investigated eventually.
TerminateProcess(process_, ResultCodes::HUNG);
// Now, just cleanup as if the process exited normally.
OnObjectSignaled(process_);
}
// The process that we are watching.
ProcessHandle process_;
DISALLOW_EVIL_CONSTRUCTORS(TimerExpiredTask);
};
} // namespace
// static
void ProcessWatcher::EnsureProcessTerminated(ProcessHandle process) {
DCHECK(process != GetCurrentProcess());
// If already signaled, then we are done!
if (WaitForSingleObject(process, 0) == WAIT_OBJECT_0) {
CloseHandle(process);
return;
}
MessageLoop::current()->PostDelayedTask(FROM_HERE,
new TimerExpiredTask(process),
kWaitInterval);
}
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