Bug 252353

Summary:	[Win] ASSERT() on Windows fires silently if caller has set up a SEH frame
Product:	WebKit	Reporter:	Brent Fulgham <bfulgham>
Component:	Web Template Framework	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	don.olmstead, Hironori.Fujii, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Local Build
Hardware:	Unspecified
OS:	Unspecified

Description Brent Fulgham 2023-02-15 15:00:13 PST

If code in the callchain has set up a structured exception handling frame with __try/__except, exceptions will fire silently, causing code to get killed and execution to mysteriously continue.

This can happen if we are called back from another DLL, called from a Windows WM_TIMER callback, or called on a secondary thread.

We should consider implementing ASSERT() on Windows with a mechanism as described in:
http://www.codeproject.com/KB/debug/DebugBreakAnyway.aspx

<rdar://8033688>