213006 2020-06-09 18:46:27 -0700 Stringifier::appendStringifiedValue() should not assume it is always safe to recurse. 2020-06-11 03:41:07 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=143511 InRadar P2 Normal --- 1 mark.lam mark.lam ews-watchlist keith_miller msaboff saam tzagallo webkit-bug-importer oldest_to_newest 1661042 0 mark.lam 2020-06-09 18:46:27 -0700 In r262727, I suggested that Alexey Shvayka add an assertion in Stringifier::appendStringifiedValue() that it is safe to recurse because we don't expect it to recurse into itself. Turns out this is a bad idea because a client may be doing the recursing, and Stringifier::appendStringifiedValue() ends up being executed with stack that is already in the reserved zone. This is legal, and is what the reserved zone is intended for as long as we don't recurse from here. However, this also means that the assertion vm.isSafeToRecurseSoft() will be fail because we're may already be in the reserved zone area. The fix is simply to remove this faulty assertion. 1661043 1 mark.lam 2020-06-09 18:46:54 -0700 <rdar://problem/64154840> 1661045 2 401503 mark.lam 2020-06-09 18:57:38 -0700 Created attachment 401503 proposed patch. 1661046 3 401503 keith_miller 2020-06-09 19:00:16 -0700 Comment on attachment 401503 proposed patch. r=me 1661053 4 mark.lam 2020-06-09 19:05:43 -0700 Thanks for the review. Landed in r262830: <http://trac.webkit.org/r262830>. 401503 2020-06-09 18:57:38 -0700 2020-06-09 19:00:16 -0700 proposed patch. bug-213006.patch text/plain 3856 mark.lam SW5kZXg6IEpTVGVzdHMvQ2hhbmdlTG9nCj09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIEpTVGVzdHMvQ2hhbmdlTG9n CShyZXZpc2lvbiAyNjI4MjcpCisrKyBKU1Rlc3RzL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpA QCAtMSwzICsxLDEzIEBACisyMDIwLTA2LTA5ICBNYXJrIExhbSAgPG1hcmsubGFtQGFwcGxlLmNv bT4KKworICAgICAgICBTdHJpbmdpZmllcjo6YXBwZW5kU3RyaW5naWZpZWRWYWx1ZSgpIHNob3Vs ZCBub3QgYXNzdW1lIGl0IGlzIGFsd2F5cyBzYWZlIHRvIHJlY3Vyc2UuCisgICAgICAgIGh0dHBz Oi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0yMTMwMDYKKyAgICAgICAgPHJkYXI6 Ly9wcm9ibGVtLzY0MTU0ODQwPgorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEp LgorCisgICAgICAgICogc3RyZXNzL2pzb24tc3RyaW5naWZ5LWV4ZWN1dGluZy1pbi1yZXNlcnZl ZC16b25lLmpzOiBBZGRlZC4KKwogMjAyMC0wNi0wOSAgTWFyayBMYW0gIDxtYXJrLmxhbUBhcHBs 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