Attachment 369124 Details for Bug 197533 – Allow GC for closed AudioContexts

[patch] Allow GC for closed AudioContexts

bug-197533-20190506084441.patch (text/plain), 17.86 KB, created by youenn fablet on 2019-05-06 08:44:41 PDT

(hide)

Description:

Filename:

MIME Type:

Creator: youenn fablet

Created: 2019-05-06 08:44:41 PDT

Size: 17.86 KB

patch

obsolete

>Subversion Revision: 244802
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index a61cd4ddd7a41a52958cd0a63d428f96bb43c5d2..aa47cf32b43d4dafc7acd2107013bf6943ef3fd9 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,35 @@
>+2019-05-06  Youenn Fablet  <youenn@apple.com>
>+
>+        WebAudio Node JS wrappers should not be collected if events can be fired
>+        https://bugs.webkit.org/show_bug.cgi?id=197533
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Before the patch, some web audio nodes could fire event listeners, but were not protected from GC.
>+        Use CustomIsReachable to ensure theses nodes can be collected if:
>+        - their AudioContext is stopped (typically due to document being navigated away).
>+        - their AudioContext is closed.
>+        - nodes do not have event listeners.
>+
>+        Covered by WPT mediacapture-streams/MediaStreamTrack-MediaElement-disabled-audio-is-silence.https.html and
>+        WPT webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/mediaElementAudioSourceToScriptProcessorTest.html
>+        and web audio WebRTC tests.
>+
>+        * Modules/webaudio/AudioBufferSourceNode.idl:
>+        * Modules/webaudio/AudioScheduledSourceNode.h:
>+        (WebCore::AudioScheduledSourceNode::hasEndedListener const):
>+        * Modules/webaudio/OscillatorNode.idl:
>+        * Modules/webaudio/ScriptProcessorNode.h:
>+        * Modules/webaudio/ScriptProcessorNode.idl:
>+        * Sources.txt:
>+        * WebCore.xcodeproj/project.pbxproj:
>+        * bindings/js/JSAudioBufferSourceNodeCustom.cpp: Added.
>+        (WebCore::JSAudioBufferSourceNodeOwner::isReachableFromOpaqueRoots):
>+        * bindings/js/JSOscillatorNodeCustom.cpp: Added.
>+        (WebCore::JSOscillatorNodeOwner::isReachableFromOpaqueRoots):
>+        * bindings/js/JSScriptProcessorNodeCustom.cpp: Added.
>+        (WebCore::JSScriptProcessorNodeOwner::isReachableFromOpaqueRoots):
>+
> 2019-05-01  Youenn Fablet  <youenn@apple.com>
> 
>         Cache.add and Cache.addAll should compute a correct response body size
>diff --git a/Source/WebCore/Modules/webaudio/AudioBufferSourceNode.idl b/Source/WebCore/Modules/webaudio/AudioBufferSourceNode.idl
>index f42bfe9590dd712bda05839b1544212327981a5e..9a287aa41bb29851b982b022366be16b88b09daa 100644
>--- a/Source/WebCore/Modules/webaudio/AudioBufferSourceNode.idl
>+++ b/Source/WebCore/Modules/webaudio/AudioBufferSourceNode.idl
>@@ -25,6 +25,7 @@
> // A cached (non-streamed), memory-resident audio source
> [
>     Conditional=WEB_AUDIO,
>+    CustomIsReachable,
>     JSGenerateToJSObject,
> ] interface AudioBufferSourceNode : AudioNode {
>     attribute AudioBuffer? buffer;
>diff --git a/Source/WebCore/Modules/webaudio/AudioContext.h b/Source/WebCore/Modules/webaudio/AudioContext.h
>index 3705c4953eac66052d6bd310fbe4fa8038ae1bc5..b8a24a6ce03755087cb8ce7b4d0644cae21fd147 100644
>--- a/Source/WebCore/Modules/webaudio/AudioContext.h
>+++ b/Source/WebCore/Modules/webaudio/AudioContext.h
>@@ -130,6 +130,7 @@ public:
> 
>     enum class State { Suspended, Running, Interrupted, Closed };
>     State state() const;
>+    bool isClosed() const { return m_state == State::Closed; }
> 
>     bool wouldTaintOrigin(const URL&) const;
> 
>diff --git a/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.h b/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.h
>index 2e9c2e04fc79a3dc9278ef029cd784553764f2ec..8d919a8c3d8c7fa6f4d684e1aa02e953bc10d9d3 100644
>--- a/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.h
>+++ b/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.h
>@@ -61,6 +61,8 @@ public:
>     bool isPlayingOrScheduled() const { return m_playbackState == PLAYING_STATE || m_playbackState == SCHEDULED_STATE; }
>     bool hasFinished() const { return m_playbackState == FINISHED_STATE; }
> 
>+    bool hasEndedListener() const { return m_hasEndedListener; }
>+
> protected:
>     // Get frame information for the current time quantum.
>     // We handle the transition into PLAYING_STATE and FINISHED_STATE here,
>diff --git a/Source/WebCore/Modules/webaudio/OscillatorNode.idl b/Source/WebCore/Modules/webaudio/OscillatorNode.idl
>index df39f1c83d5e08aec19e407d1b27384f4d5f3b33..13a58be06ccf52d26b3e8979ce9de176e48773a6 100644
>--- a/Source/WebCore/Modules/webaudio/OscillatorNode.idl
>+++ b/Source/WebCore/Modules/webaudio/OscillatorNode.idl
>@@ -33,6 +33,7 @@ enum OscillatorType {
> 
> [
>     Conditional=WEB_AUDIO,
>+    CustomIsReachable,
>     JSGenerateToJSObject,
> ] interface OscillatorNode : AudioNode {
>     attribute OscillatorType type;
>diff --git a/Source/WebCore/Modules/webaudio/ScriptProcessorNode.h b/Source/WebCore/Modules/webaudio/ScriptProcessorNode.h
>index 98e1f0a4773467d926deee01bf28abb2148bd645..846018a1b92e9afe622dbf087fb50dac2138d534 100644
>--- a/Source/WebCore/Modules/webaudio/ScriptProcessorNode.h
>+++ b/Source/WebCore/Modules/webaudio/ScriptProcessorNode.h
>@@ -63,6 +63,8 @@ public:
> 
>     size_t bufferSize() const { return m_bufferSize; }
> 
>+    bool hasAudioProcessListener() const { return m_hasAudioProcessListener; }
>+
> private:
>     double tailTime() const override;
>     double latencyTime() const override;
>diff --git a/Source/WebCore/Modules/webaudio/ScriptProcessorNode.idl b/Source/WebCore/Modules/webaudio/ScriptProcessorNode.idl
>index 45cc63083c3857f6386a0bcbd27fb92591ace068..e1668faeedb463d3849182b74305168b216cceee 100644
>--- a/Source/WebCore/Modules/webaudio/ScriptProcessorNode.idl
>+++ b/Source/WebCore/Modules/webaudio/ScriptProcessorNode.idl
>@@ -25,6 +25,7 @@
> // For real-time audio stream synthesis/processing in JavaScript 
> [
>     Conditional=WEB_AUDIO,
>+    CustomIsReachable,
>     JSGenerateToJSObject,
>     JSGenerateToNativeObject
> ] interface ScriptProcessorNode : AudioNode {
>diff --git a/Source/WebCore/Sources.txt b/Source/WebCore/Sources.txt
>index e09eb2eeb03b4fdc274abb95833dad7066ca218c..02d44148148fa9e13764315c2144bccc21c4f2ed 100644
>--- a/Source/WebCore/Sources.txt
>+++ b/Source/WebCore/Sources.txt
>@@ -431,6 +431,7 @@ animation/DocumentTimeline.cpp
> animation/KeyframeEffect.cpp
> animation/WebAnimation.cpp
> 
>+bindings/js/JSAudioBufferSourceNodeCustom.cpp
> bindings/js/CachedModuleScriptLoader.cpp
> bindings/js/CachedScriptFetcher.cpp
> bindings/js/CallTracer.cpp
>@@ -517,6 +518,7 @@ bindings/js/JSNodeCustom.cpp
> bindings/js/JSNodeIteratorCustom.cpp
> bindings/js/JSNodeListCustom.cpp
> bindings/js/JSOffscreenCanvasRenderingContext2DCustom.cpp
>+bindings/js/JSOscillatorNodeCustom.cpp
> bindings/js/JSPaintRenderingContext2DCustom.cpp
> bindings/js/JSPaintWorkletGlobalScopeCustom.cpp
> bindings/js/JSPaymentMethodChangeEventCustom.cpp
>@@ -529,6 +531,7 @@ bindings/js/JSPromiseRejectionEventCustom.cpp
> bindings/js/JSReadableStreamSourceCustom.cpp
> bindings/js/JSRemoteDOMWindowBase.cpp
> bindings/js/JSRemoteDOMWindowCustom.cpp
>+bindings/js/JSScriptProcessorNodeCustom.cpp
> bindings/js/JSSVGPathSegCustom.cpp
> bindings/js/JSSVGViewSpecCustom.cpp
> bindings/js/JSStyleSheetCustom.cpp
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index 7bfdca2fbf1b9f6350bdac29ddd8c9c918275eec..4622483088d7ec2d5bc271515a21594f69e51783 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -7180,6 +7180,9 @@
> 		41209E94216EA69A00A73A12 /* RTCCertificate.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = RTCCertificate.cpp; sourceTree = "<group>"; };
> 		41209E95216EC34E00A73A12 /* LibWebRTCCertificateGenerator.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = LibWebRTCCertificateGenerator.h; path = libwebrtc/LibWebRTCCertificateGenerator.h; sourceTree = "<group>"; };
> 		41209E96216EC34F00A73A12 /* LibWebRTCCertificateGenerator.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = LibWebRTCCertificateGenerator.cpp; path = libwebrtc/LibWebRTCCertificateGenerator.cpp; sourceTree = "<group>"; };
>+		41249B39227B9BC700A346BE /* JSScriptProcessorNodeCustom.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSScriptProcessorNodeCustom.cpp; sourceTree = "<group>"; };
>+		41249B3C227BA3C000A346BE /* JSOscillatorNodeCustom.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSOscillatorNodeCustom.cpp; sourceTree = "<group>"; };
>+		41249B3D227BA43C00A346BE /* JSAudioBufferSourceNodeCustom.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSAudioBufferSourceNodeCustom.cpp; sourceTree = "<group>"; };
> 		4127D5360F8AAB1D00E424F5 /* ScriptState.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ScriptState.cpp; sourceTree = "<group>"; };
> 		4129C9801F5861C7009D7403 /* ReadableStreamSink.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ReadableStreamSink.h; sourceTree = "<group>"; };
> 		4129C9811F5861C7009D7403 /* ReadableStreamSink.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = ReadableStreamSink.idl; sourceTree = "<group>"; };
>@@ -20575,6 +20578,7 @@
> 				71EFCEDE202B39C700D7C411 /* JSAnimationEffectCustom.cpp */,
> 				71025ED51F99F147004A250C /* JSAnimationTimelineCustom.cpp */,
> 				BC2ED6BB0C6BD2F000920BFF /* JSAttrCustom.cpp */,
>+				41249B3D227BA43C00A346BE /* JSAudioBufferSourceNodeCustom.cpp */,
> 				BE6DF70E171CA2DA00DD52B8 /* JSAudioTrackCustom.cpp */,
> 				BE6DF710171CA2DA00DD52B8 /* JSAudioTrackListCustom.cpp */,
> 				576082562011BE0200116678 /* JSAuthenticatorResponseCustom.cpp */,
>@@ -20620,10 +20624,12 @@
> 				BCD9C2610C17AA67005C90A2 /* JSNodeListCustom.cpp */,
> 				AD20B18C18E9D216005A8083 /* JSNodeListCustom.h */,
> 				3140C52B1FE06B4900D2A873 /* JSOffscreenCanvasRenderingContext2DCustom.cpp */,
>+				41249B3C227BA3C000A346BE /* JSOscillatorNodeCustom.cpp */,
> 				4B1E13EE217941320042CF98 /* JSPaintRenderingContext2DCustom.cpp */,
> 				CB38FD551CD21D5B00592A3F /* JSPerformanceEntryCustom.cpp */,
> 				833CF70F20DB3F5F00141BCC /* JSPerformanceObserverCustom.cpp */,
> 				A4A69B8BB91B49D0A804C31D /* JSPromiseRejectionEventCustom.cpp */,
>+				41249B39227B9BC700A346BE /* JSScriptProcessorNodeCustom.cpp */,
> 				83F572941FA1066F003837BE /* JSServiceWorkerClientCustom.cpp */,
> 				460D19441FCE21DD00C3DB85 /* JSServiceWorkerGlobalScopeCustom.cpp */,
> 				BC98A27C0C0C9950004BEBF7 /* JSStyleSheetCustom.cpp */,
>diff --git a/Source/WebCore/bindings/js/JSAudioBufferSourceNodeCustom.cpp b/Source/WebCore/bindings/js/JSAudioBufferSourceNodeCustom.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..1af789dd3cab17bcd8883449f087706be7b7fb81
>--- /dev/null
>+++ b/Source/WebCore/bindings/js/JSAudioBufferSourceNodeCustom.cpp
>@@ -0,0 +1,60 @@
>+/*
>+ * Copyright (C) 2019 Apple 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"
>+
>+#if ENABLE(WEB_AUDIO)
>+
>+#include "AudioContext.h"
>+#include "JSAudioBufferSourceNode.h"
>+
>+namespace WebCore {
>+using namespace JSC;
>+
>+bool JSAudioBufferSourceNodeOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, SlotVisitor&, const char** reason)
>+{
>+    auto& node = jsCast<JSAudioBufferSourceNode*>(handle.slot()->asCell())->wrapped();
>+
>+    if (node.isFiringEventListeners()) {
>+        if (UNLIKELY(reason))
>+            *reason = "AudioBufferSourceNode is firing event listeners";
>+        return true;
>+    }
>+
>+    if (!node.context().hasPendingActivity() || node.context().isClosed())
>+        return false;
>+
>+    if (node.hasEndedListener()) {
>+        if (UNLIKELY(reason))
>+            *reason = "AudioBufferSourceNode has event listeners";
>+        return true;
>+    }
>+
>+    return false;
>+}
>+
>+} // namespace WebCore
>+
>+#endif
>diff --git a/Source/WebCore/bindings/js/JSOscillatorNodeCustom.cpp b/Source/WebCore/bindings/js/JSOscillatorNodeCustom.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..2b59b0b64d0bac9d132937f9dc08368c75af70f1
>--- /dev/null
>+++ b/Source/WebCore/bindings/js/JSOscillatorNodeCustom.cpp
>@@ -0,0 +1,59 @@
>+/*
>+ * Copyright (C) 2019 Apple 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"
>+
>+#if ENABLE(WEB_AUDIO)
>+
>+#include "AudioContext.h"
>+#include "JSOscillatorNode.h"
>+
>+namespace WebCore {
>+using namespace JSC;
>+
>+bool JSOscillatorNodeOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, SlotVisitor&, const char** reason)
>+{
>+    auto& node = jsCast<JSOscillatorNode*>(handle.slot()->asCell())->wrapped();
>+
>+    if (node.isFiringEventListeners()) {
>+        if (UNLIKELY(reason))
>+            *reason = "OscillatorNode is firing event listeners";
>+        return true;
>+    }
>+
>+    if (!node.context().hasPendingActivity() || node.context().isClosed())
>+        return false;
>+
>+    if (node.hasEndedListener()) {
>+        if (UNLIKELY(reason))
>+            *reason = "OscillatorNode has event listeners";
>+        return true;
>+    }
>+    return false;
>+}
>+
>+} // namespace WebCore
>+
>+#endif
>diff --git a/Source/WebCore/bindings/js/JSScriptProcessorNodeCustom.cpp b/Source/WebCore/bindings/js/JSScriptProcessorNodeCustom.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..89d41eafb672632965314b13999f9fdee485082e
>--- /dev/null
>+++ b/Source/WebCore/bindings/js/JSScriptProcessorNodeCustom.cpp
>@@ -0,0 +1,60 @@
>+/*
>+ * Copyright (C) 2019 Apple 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"
>+
>+#if ENABLE(WEB_AUDIO)
>+
>+#include "AudioContext.h"
>+#include "JSScriptProcessorNode.h"
>+
>+namespace WebCore {
>+using namespace JSC;
>+
>+bool JSScriptProcessorNodeOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, SlotVisitor&, const char** reason)
>+{
>+    auto& node = jsCast<JSScriptProcessorNode*>(handle.slot()->asCell())->wrapped();
>+
>+    if (node.isFiringEventListeners()) {
>+        if (UNLIKELY(reason))
>+            *reason = "ScriptProcessorNode is firing event listeners";
>+        return true;
>+    }
>+
>+    if (!node.context().hasPendingActivity() || node.context().isClosed())
>+        return false;
>+
>+    if (node.hasAudioProcessListener()) {
>+        if (UNLIKELY(reason))
>+            *reason = "ScriptProcessorNode has event listeners";
>+        return true;
>+    }
>+
>+    return false;
>+}
>+
>+} // namespace WebCore
>+
>+#endif

Actions: View | Formatted Diff | Diff

Attachments on bug 197533: 368835 | 368890 | 368907 | 369124 | 369139 | 369152 | 369160