Erroneously attempting to call the -callWebScriptMethod:withArguments: method on a DOMNode and passing "offsetTop" as the method name caused a crash in KJS::Object::call at offset 120. The DOMNode in question was a hyperlink element in a document contained in a frameset, but some or all of these circumstances may be irrelevant.
Brian, please post a crash log (either as a comment or as an attachment). Also, do you have any Safari extensions like Saft installed? Thanks!
Since no more info was provided, i'm closing this bug as invalid.
Sorry for the delay; here's the crash log you requested. The actual line of code that caused the crash was: [link callWebScriptMethod:@"offsetTop" withArguments:[NSArray array]]; where "link" was a (valid) DOMNode. Obviously, since "offsetTop" is a property rather than a method, this shouldn't be expected to work, but neither should it (presumably) crash. Also, I have no Safari extensions or input managers installed. ---===--- Date/Time: 2006-07-09 16:58:45.861 -0400 OS Version: 10.4.7 (Build 8J135) Report Version: 4 Command: RPCSPrototype Path: /Users/phoenix/Documents/Schoolwork/Rapid Prototyping Project/RPCSPrototype/build/Release/RPCSPrototype.app/Contents/MacOS/RPCSPrototype Parent: WindowServer [5995] Version: ??? (1.0) PID: 17516 Thread: 0 Exception: EXC_BAD_ACCESS (0x0001) Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x000000a9 Thread 0 Crashed: 0 com.apple.JavaScriptCore 0x95bc0978 KJS::Object::call(KJS::ExecState*, KJS::Object&, KJS::List const&) + 120 1 com.apple.JavaScriptCore 0x95c02d2c -[WebScriptObject callWebScriptMethod:withArguments:] + 504 2 edu.cmu.firebird.RPCSPrototype 0x000035ec -[TestController selectLinkAtIndex:] + 112 3 com.apple.Foundation 0x92943ad8 _nsnote_callback + 180 4 com.apple.CoreFoundation 0x90803010 __CFXNotificationPost + 368 5 com.apple.CoreFoundation 0x907fb0ec _CFXNotificationPostNotification + 684 6 com.apple.Foundation 0x9292dee0 -[NSNotificationCenter postNotificationName:object:userInfo:] + 92 7 com.apple.WebKit 0x95ae0590 -[WebView(WebPrivate) _progressCompleted:] + 124 8 com.apple.WebKit 0x95aef480 -[WebSubresourceClient didFailWithError:] + 96 9 com.apple.WebKit 0x95aef400 -[WebBaseResourceHandleDelegate connection:didFailWithError:] + 52 10 com.apple.Foundation 0x9299f110 -[NSURLConnection(NSURLConnectionInternal) _sendDidFailCallback] + 100 11 com.apple.Foundation 0x92974ab8 -[NSURLConnection(NSURLConnectionInternal) _sendCallbacks] + 556 12 com.apple.Foundation 0x92974810 _sendCallbacks + 156 13 com.apple.CoreFoundation 0x907dc4cc __CFRunLoopDoSources0 + 384 14 com.apple.CoreFoundation 0x907db9fc __CFRunLoopRun + 452 15 com.apple.CoreFoundation 0x907db47c CFRunLoopRunSpecific + 268 16 com.apple.HIToolbox 0x931eb740 RunCurrentEventLoopInMode + 264 17 com.apple.HIToolbox 0x931eadd4 ReceiveNextEventCommon + 380 18 com.apple.HIToolbox 0x931eac40 BlockUntilNextEventMatchingListInMode + 96 19 com.apple.AppKit 0x936eeae4 _DPSNextEvent + 384 20 com.apple.AppKit 0x936ee7a8 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 116 21 com.apple.AppKit 0x936eacec -[NSApplication run] + 472 22 com.apple.AppKit 0x937db87c NSApplicationMain + 452 23 edu.cmu.firebird.RPCSPrototype 0x000028f8 _start + 340 (crt.c:272) 24 edu.cmu.firebird.RPCSPrototype 0x000027a0 start + 60 Thread 1: 0 libSystem.B.dylib 0x9000b268 mach_msg_trap + 8 1 libSystem.B.dylib 0x9000b1bc mach_msg + 60 2 com.unsanity.ape 0xc0002afc __ape_internal + 3300 3 com.unsanity.ape 0xc0001910 __ape_agent + 64 4 libSystem.B.dylib 0x9002bc28 _pthread_body + 96 Thread 2: 0 libSystem.B.dylib 0x9000b268 mach_msg_trap + 8 1 libSystem.B.dylib 0x9000b1bc mach_msg + 60 2 com.apple.CoreFoundation 0x907dbb78 __CFRunLoopRun + 832 3 com.apple.CoreFoundation 0x907db47c CFRunLoopRunSpecific + 268 4 com.apple.Foundation 0x9296b69c +[NSURLConnection(NSURLConnectionInternal) _resourceLoadLoop:] + 264 5 com.apple.Foundation 0x92944194 forkThreadForFunction + 108 6 libSystem.B.dylib 0x9002bc28 _pthread_body + 96 Thread 3: 0 libSystem.B.dylib 0x9000b268 mach_msg_trap + 8 1 libSystem.B.dylib 0x9000b1bc mach_msg + 60 2 com.apple.CoreFoundation 0x907dbb78 __CFRunLoopRun + 832 3 com.apple.CoreFoundation 0x907db47c CFRunLoopRunSpecific + 268 4 com.apple.Foundation 0x9296c7dc +[NSURLCache _diskCacheSyncLoop:] + 152 5 com.apple.Foundation 0x92944194 forkThreadForFunction + 108 6 libSystem.B.dylib 0x9002bc28 _pthread_body + 96 Thread 4: 0 libSystem.B.dylib 0x9000b268 mach_msg_trap + 8 1 libSystem.B.dylib 0x9000b1bc mach_msg + 60 2 com.apple.CoreFoundation 0x907dbb78 __CFRunLoopRun + 832 3 com.apple.CoreFoundation 0x907db47c CFRunLoopRunSpecific + 268 4 com.apple.Foundation 0x92953164 -[NSRunLoop runMode:beforeDate:] + 172 5 com.apple.Foundation 0x9295309c -[NSRunLoop run] + 76 6 com.apple.WebKit 0x95ac1f70 +[WebFileDatabase _syncLoop:] + 176 7 com.apple.Foundation 0x92944194 forkThreadForFunction + 108 8 libSystem.B.dylib 0x9002bc28 _pthread_body + 96 Thread 0 crashed with PPC Thread State 64: srr0: 0x0000000095bc0978 srr1: 0x000000000200f030 vrsave: 0x0000000000000000 cr: 0x24002288 xer: 0x0000000020000007 lr: 0x0000000095bc0908 ctr: 0x00000000907beac8 r0: 0x0000000000000001 r1: 0x00000000bfffdf10 r2: 0x0000000000000000 r3: 0x00000000bfffdf50 r4: 0x00000000000000a9 r5: 0x00000000003db310 r6: 0x00000000bfffe000 r7: 0x00000000bfffe010 r8: 0x0000000000000000 r9: 0x00000000a5bd7034 r10: 0x00000000a5bdd808 r11: 0x00000000a5bdd800 r12: 0x00000000907beac8 r13: 0x0000000000000000 r14: 0x0000000000000001 r15: 0x0000000000000000 r16: 0x0000000000000000 r17: 0x0000000000000000 r18: 0x000000000030a350 r19: 0x00000000003625b0 r20: 0x00000000a5ac1890 r21: 0x00000000a07b2eb0 r22: 0x0000000000000001 r23: 0x0000000000000000 r24: 0x00000000003061b0 r25: 0x00000000a5be2b34 r26: 0x00000000bfffe030 r27: 0x00000000003aefa0 r28: 0x00000000003db310 r29: 0x00000000bfffe020 r30: 0x00000000a5bd6fa4 r31: 0x0000000095bc0908 Binary Images Description: 0x1000 - 0x4fff edu.cmu.firebird.RPCSPrototype ??? 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Could you try with those extensions you have their disabled? If it still occurs then, that'd be even better. Even got a small program/testcase to demonstrate the issue perhaps?
I can confirm that this crashes with WebKit 418.9.1, still need to test with ToT.
With a debug build of ToT we hit an assertion failure: Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_PROTECTION_FAILURE at address: 0x00000001 0x003f4dd1 in KJS::JSObject::call (this=0x1, exec=0x21841bc, thisObj=0x7ec080, args=@0xbfffe45c) at /Users/mrowe/Documents/Source/SVN/WebKit-Nightlies/JavaScriptCore/kjs/object.cpp:70 70 assert(implementsCall()); (gdb) bt #0 0x003f4dd1 in KJS::JSObject::call (this=0x1, exec=0x21841bc, thisObj=0x7ec080, args=@0xbfffe45c) at /Users/mrowe/Documents/Source/SVN/WebKit-Nightlies/JavaScriptCore/kjs/object.cpp:70 #1 0x013026eb in -[WebScriptObject callWebScriptMethod:withArguments:] (self=0x21c2120, _cmd=0x2cadb4, name=0x2058, args=0x21c4eb0) at /Users/mrowe/Documents/Source/SVN/WebKit-Nightlies/WebCore/bindings/objc/WebScriptObject.mm:193 #2 0x00001e30 in -[MyController webView:didFinishLoadForFrame:] () #3 0x90a57c56 in objc_msgSendv () #4 0x925fc43e in -[NSInvocation invoke] () #5 0x92622433 in -[NSInvocation invokeWithTarget:] () #6 0x00260836 in -[_WebSafeForwarder forwardInvocation:] (self=0x2168ae0, _cmd=0x90aa6194, anInvocation=0x21c1c30) at /Users/mrowe/Documents/Source/SVN/WebKit-Nightlies/WebKit/WebView/WebView.mm:1426 #7 0x925fb4f4 in -[NSObject(NSForwardInvocation) forward::] () #8 0x90a57ba1 in _objc_msgForward () #9 0x00293923 in WebFrameLoaderClient::dispatchDidFinishLoad (this=0x2123c60) at /Users/mrowe/Documents/Source/SVN/WebKit-Nightlies/WebKit/WebCoreSupport/WebFrameLoaderClient.mm:466 #10 0x0139827c in WebCore::FrameLoader::checkLoadCompleteForThisFrame (this=0x2817000) at /Users/mrowe/Documents/Source/SVN/WebKit-Nightlies/WebCore/loader/FrameLoader.cpp:2680 #11 0x0139852c in WebCore::FrameLoader::checkLoadComplete (this=0x2817000) at /Users/mrowe/Documents/Source/SVN/WebKit-Nightlies/WebCore/loader/FrameLoader.cpp:2752 #12 0x013986b7 in WebCore::FrameLoader::finishedLoading (this=0x2817000) at /Users/mrowe/Documents/Source/SVN/WebKit-Nightlies/WebCore/loader/FrameLoader.cpp:2502 #13 0x013a1c11 in WebCore::MainResourceLoader::didFinishLoading (this=0x2832c00) at /Users/mrowe/Documents/Source/SVN/WebKit-Nightlies/WebCore/loader/MainResourceLoader.cpp:315 #14 0x013a322c in WebCore::ResourceLoader::didFinishLoading (this=0x2832c00) at /Users/mrowe/Documents/Source/SVN/WebKit-Nightlies/WebCore/loader/ResourceLoader.cpp:311 #15 0x01383269 in -[WebCoreResourceHandleAsDelegate connectionDidFinishLoading:] (self=0x2153fe0, _cmd=0x90a9d160, con=0x2153220) at /Users/mrowe/Documents/Source/SVN/WebKit-Nightlies/WebCore/platform/network/mac/ResourceHandleMac.mm:367 #16 0x9265be00 in -[NSURLConnection(NSURLConnectionInternal) _sendDidFinishLoadingCallback] () #17 0x92659ea5 in -[NSURLConnection(NSURLConnectionInternal) _sendCallbacks] () #18 0x92659b41 in _sendCallbacks () #19 0x90829379 in CFRunLoopRunSpecific () #20 0x90828eb5 in CFRunLoopRunInMode () #21 0x92dcdb90 in RunCurrentEventLoopInMode () #22 0x92dcd1ce in ReceiveNextEventCommon () #23 0x92dcd0ee in BlockUntilNextEventMatchingListInMode () #24 0x9326f465 in _DPSNextEvent () #25 0x9326f056 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] () #26 0x93268ddb in -[NSApplication run] () #27 0x9325cd2f in NSApplicationMain () #28 0x00001cf6 in _start () #29 0x00001c1d in start () Current language: auto; currently c++
Created attachment 12550 [details] Patch As well as fixing the bug in question, I altered the behaviour when an exception is thrown in the called method. It now returns 0 as this would provide some method for the caller to know that the call to the function failed.
Comment on attachment 12550 [details] Patch For the record, it's possible that the change from returning undefined to returning zero when the function call raises an exception could cause compatibility problems. I'm not sure if it's a good change to make for that reason, but it seems a lot more sensible behaviour.
Comment on attachment 12550 [details] Patch r=me As mentioned on IRC. File a new bug about the proposed exception change. And leave this part of of the patch: - result = jsUndefined(); exec->clearException(); + return 0;
Landed in r18973.
Filed bug 12332 about the return value when exception is thrown.