84657 2012-04-23 17:16:04 -0700 Crash or assertion failure (m_isAnimating) when adding another instance of a SMIL animated element while the animation is running 2012-10-17 21:43:32 -0700 1 1 1 Unclassified WebKit SVG 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 99678 1 thorton pdr fmalita pdr schenney tasak webkit-bug-importer webkit.review.bot zimmermann oldest_to_newest 608219 0 138466 thorton 2012-04-23 17:16:04 -0700 Created attachment 138466 repro I found this while working on https://bugs.webkit.org/show_bug.cgi?id=83856, but eventually discovered it happens on ToT too. See the attached test case. Sometimes I have to refresh it once or twice before seeing the assertion: ASSERTION FAILED: m_isAnimating /Volumes/Data/Shared/src/WebKit/OpenSource/Source/WebCore/svg/properties/SVGAnimatedPropertyTearOff.h(92) : void WebCore::SVGAnimatedPropertyTearOff<WebCore::SVGLength>::animValWillChange() 1 0x10a8a8dc7 void WebCore::SVGAnimatedTypeAnimator::executeAction<WebCore::SVGAnimatedPropertyTearOff<WebCore::SVGLength> >(WebCore::SVGAnimatedTypeAnimator::AnimationAction, WTF::Vector<WebCore::SVGAnimatedProperty*, 0ul> const&, unsigned int, WebCore::SVGAnimatedPropertyTearOff<WebCore::SVGLength>::ContentType*) 2 0x10a8a8a69 void WebCore::SVGAnimatedTypeAnimator::animValWillChangeForType<WebCore::SVGAnimatedPropertyTearOff<WebCore::SVGLength> >(WTF::Vector<WebCore::SVGAnimatedProperty*, 0ul> const&) 3 0x10a8a7c38 WebCore::SVGAnimatedLengthAnimator::animValWillChange(WTF::Vector<WebCore::SVGAnimatedProperty*, 0ul> const&) 4 0x10a8c9e20 WebCore::SVGAnimateElement::calculateAnimatedValue(float, unsigned int, WebCore::SVGSMILElement*) 5 0x10a8d3098 WebCore::SVGAnimationElement::updateAnimation(float, unsigned int, WebCore::SVGSMILElement*) 6 0x10a9af09f WebCore::SVGSMILElement::progress(WebCore::SMILTime, WebCore::SVGSMILElement*) 7 0x10a824d95 WebCore::SMILTimeContainer::updateAnimations(WebCore::SMILTime) 8 0x10a8244a7 WebCore::SMILTimeContainer::timerFired(WebCore::Timer<WebCore::SMILTimeContainer>*) 9 0x10a82f133 WebCore::Timer<WebCore::SMILTimeContainer>::fired() 608230 1 thorton 2012-04-23 17:33:04 -0700 Oh, hey, it crashes instead if it's a release build: Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000028 0 com.apple.WebCore 0x00007fff9069b864 void WebCore::SVGAnimatedTypeAnimator::executeAction<WebCore::SVGAnimatedPropertyTearOff<WebCore::SVGLength> >(WebCore::SVGAnimatedTypeAnimator::AnimationAction, WTF::Vector<WebCore::SVGAnimatedProperty*, 0ul> const&, unsigned int, WebCore::SVGAnimatedPropertyTearOff<WebCore::SVGLength>::ContentType*) + 244 1 com.apple.WebCore 0x00007fff906a420d WebCore::SVGAnimateElement::targetElementWillChange(WebCore::SVGElement*, WebCore::SVGElement*) + 141 2 com.apple.WebCore 0x00007fff9070191b WebCore::SVGSMILElement::resetTargetElement() + 27 3 com.apple.WebCore 0x00007fff8fda0718 WebCore::SVGDocumentExtensions::removeAllAnimationElementsFromTarget(WebCore::SVGElement*) + 104 4 com.apple.WebCore 0x00007fff8fdae22d WebCore::SVGElement::removedFromDocument() + 29 5 com.apple.WebCore 0x00007fff8fdae1cf WebCore::SVGStyledElement::removedFromDocument() + 31 6 com.apple.WebCore 0x00007fff90129083 void WebCore::Private::addChildNodesToDeletionQueue<WebCore::Node, WebCore::ContainerNode>(WebCore::Node*&, WebCore::Node*&, WebCore::ContainerNode*) + 83 7 com.apple.WebCore 0x00007fff8fc0aee8 void WebCore::removeAllChildrenInContainer<WebCore::Node, WebCore::ContainerNode>(WebCore::ContainerNode*) + 136 8 com.apple.WebCore 0x00007fff8fc0ac21 WebCore::Document::removedLastRef() + 449 9 com.apple.WebCore 0x00007fff904b0daf WebCore::JSNode::destroy(JSC::JSCell*) + 47 10 com.apple.JavaScriptCore 0x00007fff89b215fe JSC::MarkedBlock::FreeCell* JSC::MarkedBlock::sweepHelper<true>(JSC::MarkedBlock::SweepMode) + 350 11 com.apple.JavaScriptCore 0x00007fff89ace6cb JSC::Heap::sweep() + 107 12 com.apple.JavaScriptCore 0x00007fff89acef57 JSC::Heap::collect(JSC::Heap::SweepToggle) + 151 608233 2 webkit-bug-importer 2012-04-23 17:36:25 -0700 <rdar://problem/11305318> 635454 3 pdr 2012-05-28 16:41:46 -0700 I hit this working on a personal project recently :(. Are you currently working on this Tim? 635455 4 thorton 2012-05-28 16:42:51 -0700 (In reply to comment #3) > I hit this working on a personal project recently :(. Are you currently working on this Tim? Not at the moment. 726382 5 pdr 2012-09-23 21:42:36 -0700 Even simpler repro: <svg> <rect id="rect" x="100" y="100" width="100" height="100" fill="green"> <animate attributeName="x" from="100" to="200" dur="3s" begin="0s" /> </rect> <use xlink:href="#rect" x="200" y="200"> <animate attributeName="xlink:href" to="#notrect" begin="1s" dur="3s"/> </use> </svg> 743921 6 169101 pdr 2012-10-17 00:05:12 -0700 Created attachment 169101 Allow lazy initialization of SVG XML animated properties. Finally getting a patch up for this! I explored tracking the animating properties in the animator so that we could catch this case once instead of checking for it on every call to resetAnimValToBaseVal. Unfortunately the checks required ended up polluting the instance code which would affect performance outside animations. I also explored the naive approach of invalidating the entire tree when we dynamically add instances of animating elements (see comment in SVGElementInstance::invalidateAllInstancesOfElement about this) but, again, that ended up being terrible for performance. 743929 7 thorton 2012-10-17 00:10:37 -0700 Philip, did you mean to cq+ this? 743942 8 pdr 2012-10-17 00:20:43 -0700 (In reply to comment #7) > Philip, did you mean to cq+ this? I thought the queue waited on r+ but I may be mistaken. I've removed cq+ just in case. 744487 9 169101 thorton 2012-10-17 12:06:08 -0700 Comment on attachment 169101 Allow lazy initialization of SVG XML animated properties. View in context: https://bugs.webkit.org/attachment.cgi?id=169101&action=review > LayoutTests/svg/animations/use-while-animating-crash.html:23 > + }, 20); // This needs to be at least 20 to ensure an animation cycle runs. Do we not have a better way to do this? Events we can watch, or something? I cringe every time I see a non-0 setTimeout in a layout test. 744514 10 pdr 2012-10-17 12:49:46 -0700 (In reply to comment #9) > (From update of attachment 169101 [details]) > View in context: https://bugs.webkit.org/attachment.cgi?id=169101&action=review > > > LayoutTests/svg/animations/use-while-animating-crash.html:23 > > + }, 20); // This needs to be at least 20 to ensure an animation cycle runs. > > Do we not have a better way to do this? Events we can watch, or something? I cringe every time I see a non-0 setTimeout in a layout test. Thanks for the review. It's unfortunate but every way to start an animation is guarded by a timer so I don't think we can avoid this. 744532 11 169101 webkit.review.bot 2012-10-17 13:08:01 -0700 Comment on attachment 169101 Allow lazy initialization of SVG XML animated properties. Clearing flags on attachment: 169101 Committed r131631: <http://trac.webkit.org/changeset/131631> 744533 12 webkit.review.bot 2012-10-17 13:08:05 -0700 All reviewed patches have been landed. Closing bug. 138466 2012-04-23 17:16:04 -0700 2012-04-23 17:16:04 -0700 repro useanimate.svg image/svg+xml 1030 thorton PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHhtbG5zOnhsaW5rPSJodHRw Oi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rIj4KPHNjcmlwdD4KICAgIGZ1bmN0aW9uIHRlc3QoKSB7 CiAgICAgICAgdmFyIGEgPSBkb2N1bWVudC5jcmVhdGVFbGVtZW50TlMoImh0dHA6Ly93d3cudzMu b3JnLzIwMDAvc3ZnIiwgInVzZSIpOwogICAgICAgIGEuc2V0QXR0cmlidXRlKCJ4IiwgIjEwMHB4 Iik7CiAgICAgICAgYS5zZXRBdHRyaWJ1dGUoInkiLCAiMzQwcHgiKTsKICAgICAgICBhLnNldEF0 dHJpYnV0ZU5TKCJodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rIiwgImhyZWYiLCAiI3JlY3Qi KTsKICAgICAgICBkb2N1bWVudC5nZXRFbGVtZW50QnlJZCgicm90YXRlU3F1YXJlIikuYXBwZW5k Q2hpbGQoYSk7CiAgICB9CiAgICBzZXRUaW1lb3V0KHRlc3QsIDEwMCk7Cjwvc2NyaXB0Pgo8ZyBp ZD0icm90YXRlU3F1YXJlIj4KICAgIDxkZWZzPgogICAgICAgIDxyZWN0IGlkPSJyZWN0IiBmaWxs PSIjQUZCQ0M3IiBzdHJva2U9IiM2NDY0NjQiIHN0cm9rZS13aWR0aD0iNXB4IiB4PSIxMDBweCIg eT0iMTAwcHgiCiAgICAgICAgICAgIHdpZHRoPSIxMDBweCIgaGVpZ2h0PSIxMDBweCI+CiAgICAg 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