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Reply-To: moss@cs.umass.edu
Subject: Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.2.0-0.2
References: <announce.20150722151440.GK3864@calimero.vinschen.de>
To: cygwin@cygwin.com
From: Eliot Moss <moss@cs.umass.edu>
Message-ID: <55AFB7BE.9040307@cs.umass.edu>
Date: Wed, 22 Jul 2015 11:33:18 -0400
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On 7/22/2015 11:14 AM, Corinna Vinschen wrote:

>    NEW:  sigsetjmp and siglongjmp were only implemented as macros so far.
>    POSIX requires functions longjmp and siglongjmp to exist.  2.2.0-0.2
>    adds sigsetjmp and siglongjmp functions.
>
>    2.2.0 comes with four new functions:  getcontext, setcontext,
>    makecontext and swapcontext.

So I am wondering if signal handlers now have access to the full context,
including register values.  There was at one time a desire to port Jikes RVM,
a research Java Virtual Machine, to cygwin, to get it running under Windows.
Lack of ability to obtain and modify the ucontext in a signal handler was
the sticking point.  (It was needed in the case of, say, a null pointer
exception, to fake up the throwing of the Java exception when the signal
handler returns.)

Regards -- Eliot Moss

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