75602 2012-01-04 21:57:36 -0800 [JSC] Short circuit for a 16 bit pattern character and an 8 bit string failed 2012-02-24 01:49:23 -0800 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Unspecified Linux RESOLVED FIXED P2 Normal --- 79223 0 hojong.han webkit-unassigned barraclough fpizlo gyuyoung.kim msaboff ossy pnormand webkit.review.bot oldest_to_newest 530002 0 hojong.han 2012-01-04 21:57:36 -0800 In case of ARM_TRADITIONAL, crash occurs like below when loading http://v.youku.com/v_playlist/f16850225o1p0.html #0 0xfffffffe in ?? () No symbol table info available. #1 0x419d160c in execute (jitObject=<value optimized out>, input=<value optimized out>, start=<value optimized out>, length=<value optimized out>, output=0x0) at /home/SOURCE/webkit-efl/Source/JavaScriptCore/yarr/YarrJIT.h:74 No locals. #2 JSC::Yarr::execute (jitObject=<value optimized out>, input=<value optimized out>, start=<value optimized out>, length=<value optimized out>, output=0x0) at /home/SOURCEwebkit-efl/Source/JavaScriptCore/yarr/YarrJIT.cpp:2505 The problem is caused by the instruction which loads the invalid branch target(0xffffffff). That instruction is append to the assembler buffer while generating greedy pattern character about a 16 bit pattern character and an 8 bit string. Updating the branch target for that instruction is necessary but it's not in any where. 530771 1 121366 hojong.han 2012-01-05 16:42:39 -0800 Created attachment 121366 Patch 530780 2 121368 hojong.han 2012-01-05 16:51:51 -0800 Created attachment 121368 Patch 561660 3 121368 barraclough 2012-02-21 23:24:35 -0800 Comment on attachment 121368 Patch Looks right to me. Good catch! 561707 4 121368 webkit.review.bot 2012-02-22 00:43:37 -0800 Comment on attachment 121368 Patch Clearing flags on attachment: 121368 Committed r108456: <http://trac.webkit.org/changeset/108456> 561708 5 webkit.review.bot 2012-02-22 00:43:42 -0800 All reviewed patches have been landed. Closing bug. 561719 6 pnormand 2012-02-22 00:58:16 -0800 (In reply to comment #5) > All reviewed patches have been landed. Closing bug. Looks like this broke fast/regex/pcre-test-4.html : --- /home/slave/webkitgtk/gtk-linux-64-release/build/layout-test-results/fast/regex/pcre-test-4-expected.txt +++ /home/slave/webkitgtk/gtk-linux-64-release/build/layout-test-results/fast/regex/pcre-test-4-actual.txt @@ -70,11 +70,11 @@ PASS regex34.exec(input0); is results PASS regex35.exec(input0); is results PASS regex36.exec(input0); is results -PASS regex37.exec(input0); is results +FAIL regex37.exec(input0); should be . Was null. PASS regex37.exec(input1); is results PASS regex38.exec(input0); is results PASS regex38.exec(input1); is results -PASS regex39.exec(input0); is results +FAIL regex39.exec(input0); should be . Was null. PASS regex39.exec(input1); is results PASS regex40.exec(input0); is results PASS regex41.exec(input0); is results @@ -215,7 +215,7 @@ PASS regex104.exec(input0); is results PASS regex105.exec(input0); is results PASS regex105.exec(input1); is results -PASS regex106.exec(input0); is results +FAIL regex106.exec(input0); should be a. Was null. PASS regex107.exec(input0); is results PASS input0.match(regexGlobal0); is results PASS input1.match(regexGlobal0); is results 561836 7 ossy 2012-02-22 04:14:41 -0800 Reopen, because it fails on SL and Qt too. 561846 8 hojong.han 2012-02-22 04:23:49 -0800 (In reply to comment #7) > Reopen, because it fails on SL and Qt too. That test didn't even run in my environment, arm & linux, before the patch was applied. Now I'm finding out the reason why the returned value is null, not string "". 561865 9 ossy 2012-02-22 05:09:39 -0800 Rollout landed in http://trac.webkit.org/changeset/108484 562778 10 128382 hojong.han 2012-02-22 20:59:20 -0800 Created attachment 128382 Patch 562790 11 hojong.han 2012-02-22 21:13:56 -0800 (In reply to comment #9) > Rollout landed in http://trac.webkit.org/changeset/108484 I'm really sorry for rollout despite your grateful review and comments. In the previous patch, I had focused on the short circuit necessary to be linked. But there's one thing missed is that short circuit is not necessary for the pattern character greedy although it's helpful for non-greedy. I ran regular expression tests. Broken results are fine with new patch. 563007 12 128449 hojong.han 2012-02-23 03:24:24 -0800 Created attachment 128449 Patch 563184 13 128449 msaboff 2012-02-23 09:58:08 -0800 Comment on attachment 128449 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=128449&action=review r+ > Source/JavaScriptCore/yarr/YarrJIT.cpp:819 > + if (!((ch > 0xff) && (m_charSize == Char8))) { Please add a comment similar to what was removed. > Source/JavaScriptCore/yarr/YarrJIT.cpp:879 > + JumpList nonGreedyFailures; Add a comment here as well. 563744 14 128617 hojong.han 2012-02-23 17:33:26 -0800 Created attachment 128617 Patch 563759 15 hojong.han 2012-02-23 17:45:09 -0800 (In reply to comment #13) > (From update of attachment 128449 [details]) > View in context: https://bugs.webkit.org/attachment.cgi?id=128449&action=review > > r+ > > > Source/JavaScriptCore/yarr/YarrJIT.cpp:819 > > + if (!((ch > 0xff) && (m_charSize == Char8))) { > > Please add a comment similar to what was removed. > > > Source/JavaScriptCore/yarr/YarrJIT.cpp:879 > > + JumpList nonGreedyFailures; > > Add a comment here as well. Thank you for your review. I added comments, and uploaded new patch that has more comments on what you reviewed. Didn't I need to upload the patch again? 564092 16 128617 webkit.review.bot 2012-02-24 01:49:17 -0800 Comment on attachment 128617 Patch Clearing flags on attachment: 128617 Committed r108753: <http://trac.webkit.org/changeset/108753> 564093 17 webkit.review.bot 2012-02-24 01:49:23 -0800 All reviewed patches have been landed. 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