Bug 245874

Summary:	SIGILL early during WebProcess execution on ARM 32bit
Product:	WebKit	Reporter:	Nikolas Zimmermann <zimmermann>
Component:	WPE WebKit	Assignee:	Nikolas Zimmermann <zimmermann>
Status:	RESOLVED FIXED
Severity:	Blocker	CC:	bugs-noreply, mikhail, webkit-bug-importer
Priority:	P2
Version:	WebKit Local Build
Hardware:	Other
OS:	Linux
See Also:	https://bugs.webkit.org/show_bug.cgi?id=245321
Bug Depends on:	245321
Bug Blocks:

Description Nikolas Zimmermann 2022-09-30 06:08:54 PDT

Since a while I'm hunting a SIGILL during WebProcess execution in early stages (sometimes within BMalloc Scanvenger thread, sometimes in WPE specific WebKitExtensionManager).
I've bisected from beginning of September until now, and found 700ac83f17d8b756e640c6aaf20af02f9a6d08ce (https://bugs.webkit.org/show_bug.cgi?id=245321) to be the culprit.
The HUGE clang-tidy patch that cleans up bmalloc/WTF/JSC/...

I'm splitting it up locally into smaller pieces, only cleaning up bmalloc, only JSC, etc. to find the culprit.
I bet we're seeing a compiler bug with clang10. My build environment is targeting an embedded ARM 32bit device using WPE.

Comment 1 Nikolas Zimmermann 2022-11-09 01:45:58 PST

Closing as resolved, since the guilty patch was removed (https://github.com/WebKit/WebKit/commit/aabfacb8cf9ca4780d20ce2cca233f7988e994e2
).