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[Chicken-hackers] PATCH: allow signal handlers to be called from any thr

From: Jörg F . Wittenberger
Subject: [Chicken-hackers] PATCH: allow signal handlers to be called from any thread.
Date: Mon, 30 Nov 2015 12:44:27 +0100
User-agent: Mozilla/5.0 (X11; Linux armv7l; rv:38.0) Gecko/20100101 Icedove/38.3.0

Am 29.11.2015 um 17:55 schrieb Jörg F. Wittenberger:
> Am 26.11.2015 um 11:29 schrieb Jörg F. Wittenberger:
> The signal handler in the other thread will happily set the global
> variable C_stack_limit to point 1000 word off the stack pointer at the
> other thread.

Perhaps the attached patch is the smallest to avoid both the problems: a
increasing leak on C_stack_limit if the signals arrive at the chicken
thread before being handled and the confusion caused when signals are
dispatched to another threads.

Does two things:

a) Don't overwrite saved_stack_limit multiple times.

b) Use a known global value `stack_bottom` as the temporary value for
C_stack_limit to trigger garbage collection and interrupt dispatch.



Attachment: 0001-allowsignalhandlerstobecalledfromanythread.patch
Description: Text Data

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