7805 2006-03-16 10:15:09 -0800 LEAK: method name leaks in KJS::Bindings::CInstance::invokeMethod 2006-03-23 09:39:58 -0800 1 1 1 Unclassified WebKit JavaScriptCore 420+ Mac OS X 10.4 RESOLVED FIXED http://build.webkit.org/results/post-commit-leaks-powerpc-mac-os-x/560/DumpRenderTree-leaks.txt P2 Normal --- 1 ap darin ggaren oldest_to_newest 36559 0 ap 2006-03-16 10:15:09 -0800 A leak observed on BuildBot: Leak: 0x106d6c90 size=16 string 'getURL' Call stack: [thread 24a7]: | 0x0 | start | _start | main | dumpRenderTree | -[NSRunLoop runMode:beforeDate:] | CFRunLoopRunSpecific | __CFRunLoopRun | __CFRunLoopDoSources0 | _sendCallbacks | -[NSURLConnection(NSURLConnectionInternal) _sendCallbacks] | -[NSURLConnection(NSURLConnectionInternal) _sendDidReceiveDataCallback] | -[WebLoader connection:didReceiveData:lengthReceived:] | -[WebMainResourceLoader didReceiveData:lengthReceived:] | -[WebLoader didReceiveData:lengthReceived:] | -[WebMainResourceLoader addData:] | -[WebDataSource(WebPrivate) _receivedData:] | -[WebDataSource(WebPrivate) _commitLoadWithData:] | -[WebHTMLRepresentation receivedData:withDataSource:] | -[WebFrameBridge receivedData:textEncodingName:] | -[WebCoreFrameBridge addData:] | WebCore::Frame::addData(char const*, int) | WebCore::Frame::write(char const*, int) | WebCore::HTMLTokenizer::write(WebCore::SegmentedString const&, bool) | WebCore::HTMLTokenizer::parseTag(WebCore::SegmentedString&, WebCore::HTMLTokenizer::State) | WebCore::HTMLTokenizer::parseSpecial(WebCore::SegmentedString&, WebCore::HTMLTokenizer::State) | WebCore::HTMLTokenizer::scriptHandler(WebCore::HTMLTokenizer::State) | WebCore::HTMLTokenizer::scriptExecution(QString const&, WebCore::HTMLTokenizer::State, QString, int) | WebCore::Frame::executeScript(QString const&, int, WebCore::NodeImpl*, QString const&) | WebCore::KJSProxyImpl::evaluate(WebCore::String const&, int, WebCore::String const&, WebCore::NodeImpl*) | KJS::Interpreter::evaluate(KJS::UString const&, int, KJS::UChar const*, int, KJS::JSValue*) | KJS::InterpreterImp::evaluate(KJS::UChar const*, int, KJS::JSValue*, KJS::UString const&, int) | KJS::BlockNode::execute(KJS::ExecState*) | KJS::SourceElementsNode::execute(KJS::ExecState*) | KJS::TryNode::execute(KJS::ExecState*) | KJS::BlockNode::execute(KJS::ExecState*) | KJS::SourceElementsNode::execute(KJS::ExecState*) | KJS::IfNode::execute(KJS::ExecState*) | KJS::BlockNode::execute(KJS::ExecState*) | KJS::SourceElementsNode::execute(KJS::ExecState*) | KJS::IfNode::execute(KJS::ExecState*) | KJS::BlockNode::execute(KJS::ExecState*) | KJS::SourceElementsNode::execute(KJS::ExecState*) | KJS::ExprStatementNode::execute(KJS::ExecState*) | KJS::FunctionCallDotNode::evaluate(KJS::ExecState*) | KJS::JSObject::call(KJS::ExecState*, KJS::JSObject*, KJS::List const&) | KJS::RuntimeMethod::callAsFunction(KJS::ExecState*, KJS::JSObject*, KJS::List const&) | KJS::Bindings::CInstance::invokeMethod(KJS::ExecState*, KJS::Bindings::MethodList const&, KJS::List const&) | KJS::Bindings::CMethod::name() const | _NPN_UTF8FromIdentifier | strdup 36560 1 7114 ap 2006-03-16 10:24:37 -0800 Created attachment 7114 proposed fix 36568 2 7114 ggaren 2006-03-16 12:08:40 -0800 Comment on attachment 7114 proposed fix Nice fix. I really wish the method/field weren't responsible for deleting this data. What if a caller wanted to hang on to it past the method's/field's lifetime? Still, in practice that doesn't seem to happen, and this is the idiom used in the rest of the bindings code, so I think it's the right fix. 36569 3 darin 2006-03-16 12:27:01 -0800 I also noticed this leak. But when I went to fix this leak I went crazy and also fixed a lot of other things. We should land Alexey's patch. 36570 4 7117 darin 2006-03-16 12:27:32 -0800 Created attachment 7117 a patch that includes my fix for this leak 36571 5 darin 2006-03-16 12:28:58 -0800 Actually, although my patch has lots of other fixes, the fix for the leak is better. There no need to allocate and then later destroy a string. We can just use the pointer to the string that exists inside the private identifier. Here's an excerpt from mine: +const char* CMethod::name() const +{ + PrivateIdentifier *i = (PrivateIdentifier *)_methodIdentifier; + return i->isString ? i->value.string : 0; +} 36839 6 7114 ap 2006-03-18 03:15:56 -0800 Comment on attachment 7114 proposed fix Most importantly, my patch is simply wrong - it still leaks the name. Didn't clean up properly when moving from char* to CString... 37086 7 7117 sullivan 2006-03-20 18:41:48 -0800 Comment on attachment 7117 a patch that includes my fix for this leak I almost reviewed this, but got scared away by (1) the many style changes hiding the few (one? I gave up trying to find them) substantive changes; (2) the lack of ChangeLog explaining what substantive changes I should be looking for. 37396 8 7117 mjs 2006-03-22 21:43:57 -0800 Comment on attachment 7117 a patch that includes my fix for this leak Per sullivan's comment, please add a ChangeLog entry explaining the substantial change - I couldn't find it either. 37407 9 darin 2006-03-23 07:29:32 -0800 The reason the patch doesn't have a change log is that I wasn't really ready to submit it for review. I attached it to demonstrate the leak fix within and then Geoff set the review flag. I decided to set the review flag myself to make it clear I had made the code change, but I haven't done my usual steps to prepare to land a code change yet. 37414 10 ggaren 2006-03-23 09:39:58 -0800 Sorry. 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