[pcre-dev] [Bug 1803] segfault in pcre jit when running twig…

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Author: admin
Date:  
To: pcre-dev
Subject: [pcre-dev] [Bug 1803] segfault in pcre jit when running twig test suite (PHP7)
https://bugs.exim.org/show_bug.cgi?id=1803

--- Comment #32 from Nish Aravamudan <nish.aravamudan@???> ---
Created attachment 873
--> https://bugs.exim.org/attachment.cgi?id=873&action=edit
GDB log showing second pcre_exec possibly corrupting size_offsets value

I grabbed a lot of gdb output just now, trying to narrow down when size_offsets
location gets trashed to 0. I noticed that offsetcount does, inside one of the
jit functions, get set to 2, but it's back to 3 in the caller, until it returns
to the PHP code. At which point size_offsets has been set to 0... I'm going to
put a watchpoint on the address of size_offsets to see if I can see what
actually is writing to it.

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