1/*
2 * Copyright (C) 2014-2019 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "JSGlobalObjectScriptDebugServer.h"
28
29#include <wtf/RunLoop.h>
30#include "JSCInlines.h"
31#include "JSLock.h"
32#include "RemoteInspectionTarget.h"
33
34using namespace JSC;
35
36namespace Inspector {
37
38JSGlobalObjectScriptDebugServer::JSGlobalObjectScriptDebugServer(JSGlobalObject& globalObject)
39 : ScriptDebugServer(globalObject.vm())
40 , m_globalObject(globalObject)
41{
42}
43
44void JSGlobalObjectScriptDebugServer::attachDebugger()
45{
46 attach(&m_globalObject);
47}
48
49void JSGlobalObjectScriptDebugServer::detachDebugger(bool isBeingDestroyed)
50{
51 detach(&m_globalObject, isBeingDestroyed ? Debugger::GlobalObjectIsDestructing : Debugger::TerminatingDebuggingSession);
52 if (!isBeingDestroyed)
53 recompileAllJSFunctions();
54}
55
56void JSGlobalObjectScriptDebugServer::runEventLoopWhilePaused()
57{
58 // Drop all locks so another thread can work in the VM while we are nested.
59 JSC::JSLock::DropAllLocks dropAllLocks(&m_globalObject.vm());
60
61 while (!m_doneProcessingDebuggerEvents) {
62 if (RunLoop::cycle(JSGlobalObjectScriptDebugServer::runLoopMode()) == RunLoop::CycleResult::Stop)
63 break;
64 }
65}
66
67RunLoopMode JSGlobalObjectScriptDebugServer::runLoopMode()
68{
69#if USE(CF) && !PLATFORM(WATCHOS)
70 // Run the RunLoop in a custom run loop mode to prevent default observers
71 // to run and potentially evaluate JavaScript in this context while we are
72 // nested. Only the debugger should control things until we continue.
73 // FIXME: This is not a perfect solution, as background threads are not
74 // paused and can still access and evalute script in the JSContext.
75
76 // FIXME: <rdar://problem/25972777>. On watchOS, in order for auto-attach to work,
77 // we need to run in the default run loop mode otherwise we do not receive the XPC messages
78 // necessary to setup the relay connection and negotiate an auto-attach debugger.
79 return CFSTR("com.apple.JavaScriptCore.remote-inspector-runloop-mode");
80#else
81 return DefaultRunLoopMode;
82#endif
83}
84
85} // namespace Inspector
86