RESOLVED FIXED 188157
Add a debugging utility to dump the memory layout of a JSCell. 
https://bugs.webkit.org/show_bug.cgi?id=188157
Summary Add a debugging utility to dump the memory layout of a JSCell.
Mark Lam
Reported 2018-07-30 00:15:48 PDT
This is useful for some types of debugging work.
Attachments
proposed patch. (12.77 KB, patch)
2018-07-30 00:34 PDT, Mark Lam 		ysuzuki: review+
ews-watchlist: commit-queue-
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Mark Lam
Comment 1 2018-07-30 00:34:33 PDT
Created attachment 346053 [details] proposed patch.
EWS Watchlist
Comment 2 2018-07-30 01:59:36 PDT
Comment on attachment 346053 [details] proposed patch. Attachment 346053 [details] did not pass jsc-ews (mac): Output: https://webkit-queues.webkit.org/results/8697267 New failing tests: stress/ftl-put-by-id-setter-exception-interesting-live-state.js.ftl-eager-no-cjit apiTests
Yusuke Suzuki
Comment 3 2018-07-30 02:41:35 PDT
Comment on attachment 346053 [details] proposed patch. View in context: https://bugs.webkit.org/attachment.cgi?id=346053&action=review r=me > Source/JavaScriptCore/ChangeLog:37 > + structureID 369 0x171 structure 0x104b723e0 > + indexingTypeAndMisc 11 0xb ArrayWithArrayStorage > + type 33 0x21 It would be nice if we can put classInfo's name too.
Mark Lam
Comment 4 2018-07-30 07:44:04 PDT
(In reply to Yusuke Suzuki from comment #3) > Comment on attachment 346053 [details] > proposed patch. > > View in context: > https://bugs.webkit.org/attachment.cgi?id=346053&action=review > > r=me Thanks for the review. > > Source/JavaScriptCore/ChangeLog:37 > > + structureID 369 0x171 structure 0x104b723e0 > > + indexingTypeAndMisc 11 0xb ArrayWithArrayStorage > > + type 33 0x21 > > It would be nice if we can put classInfo's name too. We already do print the className e.g. <0x104bc8260, Object> <0x104bb4360, Array>
Mark Lam
Comment 5 2018-07-30 07:47:22 PDT
Landed in r234363: <http://trac.webkit.org/r234363>.
Radar WebKit Bug Importer
Comment 6 2018-07-30 07:48:25 PDT
<rdar://problem/42731814>
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