inspector/JSGlobalObjectScriptDebugServer.cpp

   1 /*
   2  * Copyright (C) 2014 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 "EventLoop.h"
  30 #include "JSCInlines.h"
  31 #include "JSLock.h"
  32
  33 using namespace JSC;
  34
  35 namespace Inspector {
  36
  37 JSGlobalObjectScriptDebugServer::JSGlobalObjectScriptDebugServer(JSGlobalObject& globalObject)
  38     : ScriptDebugServer(false)
  39     , m_globalObject(globalObject)
  40 {
  41 }
  42
  43 void JSGlobalObjectScriptDebugServer::addListener(ScriptDebugListener* listener)
  44 {
  45     if (!listener)
  46         return;
  47
  48     bool wasEmpty = m_listeners.isEmpty();
  49     m_listeners.add(listener);
  50
  51     // First listener. Attach the debugger to the JSGlobalObject.
  52     if (wasEmpty) {
  53         attach(&m_globalObject);
  54         recompileAllJSFunctions();
  55     }
  56 }
  57
  58 void JSGlobalObjectScriptDebugServer::removeListener(ScriptDebugListener* listener, bool isBeingDestroyed)
  59 {
  60     if (!listener)
  61         return;
  62
  63     m_listeners.remove(listener);
  64
  65     // Last listener. Detach the debugger from the JSGlobalObject.
  66     if (m_listeners.isEmpty()) {
  67         detach(&m_globalObject, isBeingDestroyed ? Debugger::GlobalObjectIsDestructing : Debugger::TerminatingDebuggingSession);
  68         if (!isBeingDestroyed)
  69             recompileAllJSFunctions();
  70     }
  71 }
  72
  73 void JSGlobalObjectScriptDebugServer::recompileAllJSFunctions()
  74 {
  75     JSC::Debugger::recompileAllJSFunctions(&m_globalObject.vm());
  76 }
  77
  78 void JSGlobalObjectScriptDebugServer::runEventLoopWhilePaused()
  79 {
  80     // Drop all locks so another thread can work in the VM while we are nested.
  81     JSC::JSLock::DropAllLocks dropAllLocks(&m_globalObject.vm());
  82
  83     EventLoop loop;
  84     while (!m_doneProcessingDebuggerEvents && !loop.ended())
  85         loop.cycle();
  86 }
  87
  88 } // namespace Inspector
  89