54608 2011-02-16 19:20:15 -0800 Refactor WriteBarrier and DeprecatedPtr to have less code duplication. 2011-02-18 06:59:30 -0800 1 1 1 Unclassified WebKit New Bugs 528+ (Nightly build) Other OS X 10.5 NEW P2 Normal --- 54705 1 oliver oliver abarth buildbot eric galpeter webkit.review.bot zherczeg oldest_to_newest 352538 0 oliver 2011-02-16 19:20:15 -0800 Refactor WriteBarrier and DeprecatedPtr to have less code duplication. 353041 1 82833 oliver 2011-02-17 11:16:26 -0800 Created attachment 82833 Patch 353048 2 82833 ggaren 2011-02-17 11:25:16 -0800 Comment on attachment 82833 Patch r=me 353073 3 buildbot 2011-02-17 12:02:40 -0800 Attachment 82833 did not build on win: Build output: http://queues.webkit.org/results/7929545 353106 4 webkit.review.bot 2011-02-17 12:43:16 -0800 http://trac.webkit.org/changeset/78856 might have broken Windows Release (Build) 353530 5 zherczeg 2011-02-18 04:50:16 -0800 I saw this patch was rolled out, and I decided to help you a little. v8-crypto goes into an infinite loop because of the following expression: var a = new Array() a[0] = 1 print(a.length) It is "0" with this patch, and "1" after the patch was rolled out. I think the append does not happen, but I need some further investigation. 353544 6 zherczeg 2011-02-18 05:31:47 -0800 emit_op_put_by_val: addSlowCase(branch32(AboveOrEqual, regT2, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength)))); 0xb791027f: cmp 0x30(%eax),%ecx (gdb) x $eax+0x30 0xb78c2ff0: 0x00000003 (gdb) x $ecx 0x0: Cannot access memory at address 0x0 eax points to the array, and its length is 3, instead of 0. Thus the append is "successful". 353561 7 zherczeg 2011-02-18 06:28:32 -0800 Forget about my previous comment, the initialCapacity is 3, so that is ok. However, the vector clear loop in JSArray constructor: JSArray::JSArray(JSGlobalData& globalData, NonNullPassRefPtr<Structure> structure, const ArgList& list) for (; i < initialStorage; i++) vector[i].clear(); was set the values to EmptyValueTag, but when this patch is applied, it set to 0 by WriteBarrier.h:78 void clear() { m_value = 0; } Zero is not even a valid JSValue32_64 tag, so this is totally wrong. 353570 8 zherczeg 2011-02-18 06:47:44 -0800 was: WriteBarrier.h:122 void clear() { m_value = JSValue::encode(JSValue()); } which is: JSValue.h:403 u.asBits.tag = EmptyValueTag; now: WriteBarrier.h:78 void clear() { m_value = 0; } I'll try: WriteBarrier.h:78 void clear() { m_value = JSValue::encode(JSValue()); } 353579 9 82833 aroben 2011-02-18 06:57:31 -0800 Comment on attachment 82833 Patch Note that this patch was landed in r78856 and rolled out in r78945 (see bug 54705). 353582 10 zherczeg 2011-02-18 06:59:30 -0800 I know :) But the patch is not necessary wrong, maybe just there is small bug in it. Unfortunately this is not working when T is JSCell: WriteBarrier.h:78 void clear() { m_value = JSValue::encode(JSValue()); } 82833 2011-02-17 11:16:26 -0800 2011-02-18 06:57:31 -0800 Patch bug-54608-20110217111625.patch text/plain 23441 oliver U3VidmVyc2lvbiBSZXZpc2lvbjogNzg3NDUKZGlmZiAtLWdpdCBhL1NvdXJjZS9KYXZhU2NyaXB0 Q29yZS9DaGFuZ2VMb2cgYi9Tb3VyY2UvSmF2YVNjcmlwdENvcmUvQ2hhbmdlTG9nCmluZGV4IGVh ZjFhNDczOThhM2E1ZDIxYTE0NmE0NGI0MTI3ZTQxZTcxMjRiYWMuLmFjZTk4NTlmYjIwN2JkMjU4 YWJkNTA3Yjk5MjgzMDZiOTdlNGYxYjggMTAwNjQ0Ci0tLSBhL1NvdXJjZS9KYXZhU2NyaXB0Q29y ZS9DaGFuZ2VMb2cKKysrIGIvU291cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwpAQCAtMSAr MSw0OSBAQAorMjAxMS0wMi0xNyAgT2xpdmVyIEh1bnQgIDxvbGl2ZXJAYXBwbGUuY29tPgorCisg ICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgIFJlZmFjdG9yIFdy aXRlQmFycmllciBhbmQgRGVwcmVjYXRlZFB0ciB0byBoYXZlIGxlc3MgY29kZSBkdXBsaWNhdGlv bi4KKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTU0NjA4 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