[Webkit-unassigned] [Bug 97569] Assertion failure in non-JIT'ed LLInt on ARM Thumb

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=97569





--- Comment #4 from Mark Lam <mark.lam at apple.com>  2012-09-25 15:14:19 PST ---
(In reply to comment #3)
> (In reply to comment #2)
> > Your comment in the ChangeLog suggests that this issue only manifests when LLINT_C_LOOP is enabled.  I would be more comfortable if you change the above to the following instead:
> > 
> > #if CPU(ARM_THUMB2) && !(ENABLE(LLINT_C_LOOP) && ENABLE(COMPUTED_GOTO_OPCODES))
> 
> While I noticed this while using LLINT_C_LOOP, I am not entirely sure that the failure only occurs in this case. I will look around for other possible failing scenarios (i.e. where else are labels-as-values being used).

Here's an idea:
Can you confirm if the assertion you saw only came from "static MacroAssemblerCodePtr createLLIntCodePtr(LLIntCode codeId)" calling createFromExecutableAddress()?  If so, for testing purposes, you can hand inline createFromExecutableAddress(*) directly into createLLIntCodePtr() minus the assertion, and see if that makes your issues go away.  If so, then that shows that this is a LLINT_C_LOOP only issue.

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