RESOLVED WONTFIX292771
Structure Heap libpas doesn't call pas_page_malloc commit 
https://bugs.webkit.org/show_bug.cgi?id=292771
Summary Structure Heap libpas doesn't call pas_page_malloc commit
Ian Grunert
Reported 2025-05-09 07:24:01 PDT
Created attachment 475177 [details] Patch validating pas_page_malloc commit is not called While calling pas_page_malloc commit appears to be optional on Linux + Mac, on Windows we need to commit the memory prior to accessing it. We can work around this on Windows by committing the full structure heap region - but this looks like a bug.
Attachments
Patch validating pas_page_malloc commit is not called (2.09 KB, application/mbox)
2025-05-09 07:24 PDT, Ian Grunert 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2025-05-16 07:24:12 PDT
<rdar://problem/151463092>
Yusuke Suzuki
Comment 2 2025-05-16 09:58:56 PDT
Please do not do it on macOS and Linux as it is not necessary.
Ian Grunert
Comment 3 2025-05-16 10:13:31 PDT
I put a Windows-specific workaround into https://github.com/WebKit/WebKit/pull/41945 which seems to be working. Agree that adding the call on macOS / Linux seems unnecessary for release builds. Not sure if we'd want to do this on testing builds for the PAS_MPROTECT_DECOMMITTED code path.
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