[webkit-help] HTMLAudioElement not deleted on leaving page

[Yanov, Andrey]

While I'll be waiting for a result,

Is there a way to check where nodes created by JS are destroyed ?
Should they be automatically destroyed no matter what if we're leaving a page ?

Thank you,
Andrey



From: Antonio Gomes [mailto:tonikitoo at gmail.com]
Sent: Tuesday, March 06, 2012 6:16 AM
To: Yanov, Andrey
Cc: webkit-help at lists.webkit.org
Subject: Re: [webkit-help] HTMLAudioElement not deleted on leaving page

Please file a bug in bugs.webkit.org<http://bugs.webkit.org> and attach your reduced test case. It is also important to mention:

- any non obvious step needed to reproduce this;
- what version (revision, release, etc) of webkit you use;
- and what webkit port.

Cheers,
On Mon, Mar 5, 2012 at 1:37 PM, Yanov, Andrey <AYanov at luxoft.com<mailto:AYanov at luxoft.com>> wrote:
Hi dev team and everyone else.

I'm having an issue I'm trying to figure out.
I've got an HTMLAudioElement created by JS on page cuttherope.ie<http://cuttherope.ie>.
The element is created and even receives a url to load.
However, the element is not given a parent, or a sibling, thus is not added to any container element.
As a result, when navigating away from the page, it doesn't get destroyed (since not a part of a DOM tree).
I have very little idea how JS engine is working, could you please direct me where to look next ?

I would appreciate any help.
Here is the stack:
38 HTMLAudioElement() D:\Prj\wk2\Source\WebCore\html\HTMLAudioElement.cpp:42 0xba1a00ef
37 WebCore::HTMLAudioElement::create() D:\Prj\wk2\Source\WebCore\html\HTMLAudioElement.cpp:62 0xba1a0610
36 audioConstructor() \home\ayanov\Source\_products\NBT-Debug\DerivedSources\WebCore\HTMLElementFactory.cpp:159 0xb9ef37fc
35 WebCore::HTMLElementFactory::createHTMLElement() \home\ayanov\Source\_products\NBT-Debug\DerivedSources\WebCore\HTMLElementFactory.cpp:649 0xb9ef59c5
34 WebCore::HTMLDocument::createElement() D:\Prj\wk2\Source\WebCore\html\HTMLDocument.cpp:313 0xb97b3115
33 WebCore::jsDocumentPrototypeFunctionCreateElement() \home\ayanov\Source\_products\NBT-Debug\DerivedSources\WebCore\JSDocument.cpp:1911 0xb9d4d383
32 JSC::Interpreter::privateExecute() D:\Prj\wk2\Source\JavaScriptCore\interpreter\Interpreter.cpp:4004 0xba3ee357
31 JSC::Interpreter::execute() D:\Prj\wk2\Source\JavaScriptCore\interpreter\Interpreter.cpp:831 0xba3e0733
30 JSC::evaluate() D:\Prj\wk2\Source\JavaScriptCore\runtime\Completion.cpp:64 0xba408bbc
29 WebCore::JSMainThreadExecState::evaluate() D:\Prj\wk2\Source\WebCore\bindings\js\JSMainThreadExecState.h:54 0xb9cf7bc7
28 WebCore::ScriptController::evaluateInWorld() D:\Prj\wk2\Source\WebCore\bindings\js\ScriptController.cpp:141 0xb9d0bc8e
27 WebCore::ScriptController::evaluate() D:\Prj\wk2\Source\WebCore\bindings\js\ScriptController.cpp:164 0xb9d0be16
26 WebCore::ScriptElement::executeScript() D:\Prj\wk2\Source\WebCore\dom\ScriptElement.cpp:285 0xba007bb3
25 WebCore::HTMLScriptRunner::executePendingScriptAndDispatchEvent() D:\Prj\wk2\Source\WebCore\html\parser\HTMLScriptRunner.cpp:139 0xb9818b6c
24 WebCore::HTMLScriptRunner::executeParsingBlockingScript() D:\Prj\wk2\Source\WebCore\html\parser\HTMLScriptRunner.cpp:118 0xb98189ff
23 WebCore::HTMLScriptRunner::executeParsingBlockingScripts() D:\Prj\wk2\Source\WebCore\html\parser\HTMLScriptRunner.cpp:195 0xb9818eba
22 WebCore::HTMLScriptRunner::execute() D:\Prj\wk2\Source\WebCore\html\parser\HTMLScriptRunner.cpp:178 0xb9818e33
21 WebCore::HTMLDocumentParser::runScriptsForPausedTreeBuilder() D:\Prj\wk2\Source\WebCore\html\parser\HTMLDocumentParser.cpp:205 0xb9811900
20 WebCore::HTMLDocumentParser::canTakeNextToken() D:\Prj\wk2\Source\WebCore\html\parser\HTMLDocumentParser.cpp:223 0xb98119b5
19 WebCore::HTMLDocumentParser::pumpTokenizer() D:\Prj\wk2\Source\WebCore\html\parser\HTMLDocumentParser.cpp:261 0xb9811d26
18 WebCore::HTMLDocumentParser::resumeParsingAfterYield() D:\Prj\wk2\Source\WebCore\html\parser\HTMLDocumentParser.cpp:192 0xb98117dd
17 WebCore::HTMLParserScheduler::continueNextChunkTimerFired() D:\Prj\wk2\Source\WebCore\html\parser\HTMLParserScheduler.cpp:87 0xb98173fb


Thank you and have a nice day!
Andrey Yanov

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--Antonio Gomes

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