Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 1b422914d55f4aa062971939d4c8b515ad3639b6
https://github.com/WebKit/WebKit/commit/1b422914d55f4aa062971939d4c8b515ad3639b6
Author: Shu-yu Guo <[email protected]>
Date: 2026-05-29 (Fri, 29 May 2026)
Changed paths:
M Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp
Log Message:
-----------
[JSC] Move FTL stack overflow check to prologue
https://bugs.webkit.org/show_bug.cgi?id=172456
rdar://172371127
Reviewed by Yusuke Suzuki.
Move the stack overflow check in FTL to a prologue using a custom prologue
generator. This simplifies to stack overflow logic to not require restoring
state before jumping to the thunk that throws the stack overflow exception.
Also fixes a bug where the patchpoint version was not correctly restoring the
sp.
No new test as it takes too longer to trigger the stack overflow.
* Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp:
(JSC::FTL::DFG::LowerDFGToB3::lower):
Originally-landed-as: 305413.468@rapid/safari-7624.2.5.110-branch
(3e734eae0148). rdar://176061369
Canonical link: https://commits.webkit.org/314187@main
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