214289 2020-07-13 17:50:04 -0700 returnEarlyFromInfiniteLoopsForFuzzing and validateDoesGC may fail when used together in the FTL 2020-07-20 13:04:44 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=214491 InRadar P2 Normal --- 1 saam saam benjamin fpizlo ggaren gskachkov guijemont jsc32 keith_miller mark.lam mcatanzaro msaboff rmorisset ross.kirsling ticaiolima tzagallo webkit-bug-importer ysuzuki oldest_to_newest 1671242 0 saam 2020-07-13 17:50:04 -0700 ... 1671243 1 saam 2020-07-13 17:50:32 -0700 <rdar://problem/65272138> 1671255 2 404199 saam 2020-07-13 18:43:40 -0700 Created attachment 404199 patch 1671256 3 404200 saam 2020-07-13 18:44:11 -0700 Created attachment 404200 patch 1671259 4 404200 keith_miller 2020-07-13 18:54:25 -0700 Comment on attachment 404200 patch View in context: https://bugs.webkit.org/attachment.cgi?id=404200&action=review r=me with nit. > Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp:14743 > + jit.store32(CCallHelpers::TrustedImm32(DoesGCCheck::encode(true, DoesGCCheck::Special::Uninitialized)), CCallHelpers::Address(GPRInfo::regT0)); Nit: I think this can be DoesGCCheck(). But maybe I'm missing something. 1671260 5 404200 saam 2020-07-13 18:58:25 -0700 Comment on attachment 404200 patch View in context: https://bugs.webkit.org/attachment.cgi?id=404200&action=review >> Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp:14743 >> + jit.store32(CCallHelpers::TrustedImm32(DoesGCCheck::encode(true, DoesGCCheck::Special::Uninitialized)), CCallHelpers::Address(GPRInfo::regT0)); > > Nit: I think this can be DoesGCCheck(). But maybe I'm missing something. we don't have an accessor to read out the bits as is, that's why I'm calling encode 1671261 6 404202 saam 2020-07-13 19:03:10 -0700 Created attachment 404202 patch for landing 1671268 7 404204 saam 2020-07-13 20:30:04 -0700 Created attachment 404204 patch for landing 1671272 8 ews-feeder 2020-07-13 20:53:31 -0700 Committed r264330: <https://trac.webkit.org/changeset/264330> All reviewed patches have been landed. Closing bug and clearing flags on attachment 404204. 1672514 9 mcatanzaro 2020-07-17 09:40:35 -0700 Hi, this causes JSC stress tests to run forever on x86_64 when cloop is enabled. I think we need a different skip condition since --returnEarlyFromInfiniteLoopsForFuzzing is not implemented for cloop, right? Is there a way to skip tests depending on whether JIT is enabled? Concerning: the tests are still passing an aarch64, meaning this test must be skipped despite the skip if $architecture != "arm64". That indicates we probably aren't detecting aarch64 correctly. 1672865 10 saam 2020-07-19 00:47:22 -0700 (In reply to Michael Catanzaro from comment #9) > Hi, this causes JSC stress tests to run forever on x86_64 when cloop is > enabled. I think we need a different skip condition since > --returnEarlyFromInfiniteLoopsForFuzzing is not implemented for cloop, > right? Is there a way to skip tests depending on whether JIT is enabled? > > Concerning: the tests are still passing an aarch64, meaning this test must > be skipped despite the skip if $architecture != "arm64". That indicates we > probably aren't detecting aarch64 correctly. I can fix tomorrow or Monday. We probably should add $vm.isCloop() if it doesn’t exist already, and then return early from the test. Is the ARM64 bot cloop? Does it invoke run-JSC-stress-tests with “—arch arm64”? 1672893 11 mcatanzaro 2020-07-19 07:52:18 -0700 (In reply to Saam Barati from comment #10) > I can fix tomorrow or Monday. We probably should add $vm.isCloop() if it > doesn’t exist already, and then return early from the test. Thanks. See: bug #214491. I forgot to leave a link to that he re. > Is the ARM64 bot cloop? Yes. (Our internal testers actually only test cloop. The public bots are good enough to keep the JIT working. :) > Does it invoke run-JSC-stress-tests with “—arch arm64”? No, none of our runners use the --arch option. (Didn't know about that option.) It's determined by determineArchitectureFromELFBinary() in run-jsc-stress-tests, which I touched last in r261862. I might have to try to get access to a binary file to see if that function is working properly. 1673181 12 saam 2020-07-20 12:42:37 -0700 (In reply to Michael Catanzaro from comment #11) > (In reply to Saam Barati from comment #10) > > I can fix tomorrow or Monday. We probably should add $vm.isCloop() if it > > doesn’t exist already, and then return early from the test. > > Thanks. See: bug #214491. I forgot to leave a link to that he re. > > > Is the ARM64 bot cloop? > > Yes. (Our internal testers actually only test cloop. The public bots are > good enough to keep the JIT working. :) > > > Does it invoke run-JSC-stress-tests with “—arch arm64”? > > No, none of our runners use the --arch option. (Didn't know about that > option.) It's determined by determineArchitectureFromELFBinary() in > run-jsc-stress-tests, which I touched last in r261862. I might have to try > to get access to a binary file to see if that function is working properly. Yeah, if you're not passing "--arch", it's pretty likely that's the issue. 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