162343 2016-09-21 09:40:44 -0700 Add a Fence opcode to B3 2016-09-21 12:12:01 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build All All RESOLVED FIXED P2 Normal --- 162350 162316 162342 162349 1 fpizlo fpizlo commit-queue jfbastien oldest_to_newest 1232091 0 fpizlo 2016-09-21 09:40:44 -0700 Patch forthcoming. 1232130 1 289469 fpizlo 2016-09-21 11:30:55 -0700 Created attachment 289469 the patch 1232131 2 commit-queue 2016-09-21 11:32:42 -0700 Attachment 289469 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/B3FenceValue.h:80: The parameter name "origin" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3FenceValue.h:82: The parameter name "origin" adds no information, so it should be removed. [readability/parameter_name] [5] Total errors found: 2 in 19 files If any of these errors are false positives, please file a bug against check-webkit-style. 1232136 3 jfbastien 2016-09-21 11:45:21 -0700 FYI an idempotent locked access to top-of-stack can kinda serve as a less-expensive fence on x86. Something like lock or4i [RSP-8] 0 1232138 4 289469 ggaren 2016-09-21 11:47:55 -0700 Comment on attachment 289469 the patch r=me I still hate threads. 1232148 5 fpizlo 2016-09-21 12:09:34 -0700 (In reply to comment #3) > FYI an idempotent locked access to top-of-stack can kinda serve as a > less-expensive fence on x86. Something like lock or4i [RSP-8] 0 Huh. Does this correctly guard the store-load case? Should we change WTF's storeLoadFence to do this as well? 1232149 6 fpizlo 2016-09-21 12:12:01 -0700 Landed in https://trac.webkit.org/changeset/206226 289469 2016-09-21 11:30:55 -0700 2016-09-21 11:47:55 -0700 the patch blah.patch text/plain 30554 fpizlo SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkocmV2aXNpb24gMjA2MjE3KQorKysgU291cmNl L0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDYyIEBA CisyMDE2LTA5LTIxICBGaWxpcCBQaXpsbyAgPGZwaXpsb0BhcHBsZS5jb20+CisKKyAgICAgICAg QWRkIGEgRmVuY2Ugb3Bjb2RlIHRvIEIzCisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3Jn L3Nob3dfYnVnLmNnaT9pZD0xNjIzNDMKKworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkgKE9P UFMhKS4KKyAgICAgICAgCisgICAgICAgIFRoaXMgYWRkcyB0aGUgbW9zdCBiYXNpYyBmZW5jZSBz dXBwb3J0IHRvIEIzLiBDdXJyZW50bHksIHRoaXMgaXMgb3B0aW1hbCBvbiB4ODYgYW5kIGNvcnJl 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