1 /*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "ChildProcess.h"
28
29 #if !OS(WINDOWS)
30 #include <unistd.h>
31 #endif
32
33 namespace WebKit {
34
disableTermination()35 void ChildProcess::disableTermination()
36 {
37 m_terminationCounter++;
38 m_terminationTimer.stop();
39 }
40
enableTermination()41 void ChildProcess::enableTermination()
42 {
43 ASSERT(m_terminationCounter > 0);
44 m_terminationCounter--;
45
46 if (m_terminationCounter)
47 return;
48
49 if (!m_terminationTimeout) {
50 terminationTimerFired();
51 return;
52 }
53
54 m_terminationTimer.startOneShot(m_terminationTimeout);
55 }
56
ChildProcess(double terminationTimeout)57 ChildProcess::ChildProcess(double terminationTimeout)
58 : m_terminationTimeout(terminationTimeout)
59 , m_terminationCounter(0)
60 , m_terminationTimer(RunLoop::main(), this, &ChildProcess::terminationTimerFired)
61 {
62 // FIXME: The termination timer should not be scheduled on the main run loop.
63 // It won't work with the threaded mode, but it's not really useful anyway as is.
64 }
65
~ChildProcess()66 ChildProcess::~ChildProcess()
67 {
68 }
69
terminationTimerFired()70 void ChildProcess::terminationTimerFired()
71 {
72 if (!shouldTerminate())
73 return;
74
75 terminate();
76 }
77
terminate()78 void ChildProcess::terminate()
79 {
80 RunLoop::main()->stop();
81 }
82
watchdogCallback()83 NO_RETURN static void watchdogCallback()
84 {
85 // We use _exit here since the watchdog callback is called from another thread and we don't want
86 // global destructors or atexit handlers to be called from this thread while the main thread is busy
87 // doing its thing.
88 _exit(EXIT_FAILURE);
89 }
90
didCloseOnConnectionWorkQueue(WorkQueue & workQueue,CoreIPC::Connection *)91 void ChildProcess::didCloseOnConnectionWorkQueue(WorkQueue& workQueue, CoreIPC::Connection*)
92 {
93 // If the connection has been closed and we haven't responded in the main thread for 10 seconds
94 // the process will exit forcibly.
95 static const double watchdogDelay = 10.0;
96
97 workQueue.scheduleWorkAfterDelay(WorkItem::create(watchdogCallback), watchdogDelay);
98 }
99
100 } // namespace WebKit
101