webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 181 insertions, 0 deletions

diff --git a/Source/WebCore/inspector/PageScriptDebugServer.cpp b/Source/WebCore/inspector/PageScriptDebugServer.cpp
new file mode 100644
index 000000000..b3ae44b4a
--- /dev/null
+++ b/Source/WebCore/inspector/PageScriptDebugServer.cpp
@@ -0,0 +1,181 @@
+/*
+ * Copyright (C) 2013-2014 Apple Inc. All rights reserved.
+ * Copyright (c) 2011 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "config.h"
+#include "PageScriptDebugServer.h"
+
+#include "CommonVM.h"
+#include "Document.h"
+#include "EventLoop.h"
+#include "FrameView.h"
+#include "InspectorController.h"
+#include "InspectorFrontendClient.h"
+#include "JSDOMExceptionHandling.h"
+#include "JSDOMWindowCustom.h"
+#include "MainFrame.h"
+#include "Page.h"
+#include "PageGroup.h"
+#include "PluginViewBase.h"
+#include "ScriptController.h"
+#include "Timer.h"
+#include <runtime/JSLock.h>
+#include <wtf/MainThread.h>
+#include <wtf/StdLibExtras.h>
+
+#if PLATFORM(IOS)
+#include "WebCoreThreadInternal.h"
+#endif
+
+using namespace JSC;
+using namespace Inspector;
+
+namespace WebCore {
+
+PageScriptDebugServer::PageScriptDebugServer(Page& page)
+    : ScriptDebugServer(WebCore::commonVM())
+    , m_page(page)
+{
+}
+
+void PageScriptDebugServer::attachDebugger()
+{
+    m_page.setDebugger(this);
+}
+
+void PageScriptDebugServer::detachDebugger(bool isBeingDestroyed)
+{
+    m_page.setDebugger(nullptr);
+    if (!isBeingDestroyed)
+        recompileAllJSFunctions();
+}
+
+void PageScriptDebugServer::recompileAllJSFunctions()
+{
+    JSLockHolder lock(vm());
+    Debugger::recompileAllJSFunctions();
+}
+
+void PageScriptDebugServer::didPause(JSGlobalObject*)
+{
+    setJavaScriptPaused(m_page.group(), true);
+}
+
+void PageScriptDebugServer::didContinue(JSGlobalObject*)
+{
+    setJavaScriptPaused(m_page.group(), false);
+}
+
+void PageScriptDebugServer::runEventLoopWhilePaused()
+{
+#if PLATFORM(IOS)
+    // On iOS, running an EventLoop causes us to run a nested WebRunLoop.
+    // Since the WebThread is autoreleased at the end of run loop iterations
+    // we need to gracefully handle releasing and reacquiring the lock.
+    if (WebThreadIsEnabled()) {
+        ASSERT(WebThreadIsLockedOrDisabled());
+        JSC::JSLock::DropAllLocks dropAllLocks(vm());
+        WebRunLoopEnableNested();
+
+        runEventLoopWhilePausedInternal();
+
+        WebRunLoopDisableNested();
+        ASSERT(WebThreadIsLockedOrDisabled());
+        return;
+    }
+#endif
+
+    runEventLoopWhilePausedInternal();
+}
+
+void PageScriptDebugServer::runEventLoopWhilePausedInternal()
+{
+    TimerBase::fireTimersInNestedEventLoop();
+
+    m_page.incrementNestedRunLoopCount();
+
+    EventLoop loop;
+    while (!m_doneProcessingDebuggerEvents && !loop.ended())
+        loop.cycle();
+
+    m_page.decrementNestedRunLoopCount();
+}
+
+bool PageScriptDebugServer::isContentScript(ExecState* exec) const
+{
+    return &currentWorld(exec) != &mainThreadNormalWorld();
+}
+
+void PageScriptDebugServer::reportException(ExecState* exec, JSC::Exception* exception) const
+{
+    WebCore::reportException(exec, exception);
+}
+
+void PageScriptDebugServer::setJavaScriptPaused(const PageGroup& pageGroup, bool paused)
+{
+    setMainThreadCallbacksPaused(paused);
+
+    for (auto& page : pageGroup.pages()) {
+        page->setDefersLoading(paused);
+
+        for (Frame* frame = &page->mainFrame(); frame; frame = frame->tree().traverseNext())
+            setJavaScriptPaused(*frame, paused);
+
+        if (auto* frontendClient = page->inspectorController().inspectorFrontendClient()) {
+            if (paused)
+                frontendClient->pagePaused();
+            else
+                frontendClient->pageUnpaused();
+        }
+    }
+}
+
+void PageScriptDebugServer::setJavaScriptPaused(Frame& frame, bool paused)
+{
+    if (!frame.script().canExecuteScripts(NotAboutToExecuteScript))
+        return;
+
+    frame.script().setPaused(paused);
+
+    ASSERT(frame.document());
+    auto& document = *frame.document();
+    if (paused) {
+        document.suspendScriptedAnimationControllerCallbacks();
+        document.suspendActiveDOMObjects(ActiveDOMObject::JavaScriptDebuggerPaused);
+    } else {
+        document.resumeActiveDOMObjects(ActiveDOMObject::JavaScriptDebuggerPaused);
+        document.resumeScriptedAnimationControllerCallbacks();
+    }
+
+    if (auto* view = frame.view()) {
+        for (auto& child : view->children()) {
+            if (!is<PluginViewBase>(child.get()))
+                continue;
+            downcast<PluginViewBase>(child.get()).setJavaScriptPaused(paused);
+        }
+    }
+}
+
+} // namespace WebCore