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Tony, Understood, but you use the context as one end of the stack.<BR>
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void<BR>ThreadPThread__ProcessStopped (m3_pthread_t mt, char *bottom, char *context,<BR> void (*p)(void *start, void *limit))<BR>{<BR> /* process stack */<BR> if (stack_grows_down) {<BR> assert(context < bottom);<BR> p(context, bottom); here<BR> } else {<BR> assert(bottom < context);<BR> p(bottom, context); here <BR> }<BR> /* process register context */<BR> p(context, context + sizeof(ucontext_t));<BR>}<BR><BR>
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- Jay<BR><BR> <BR>
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From: hosking@cs.purdue.edu<BR>Date: Thu, 3 Dec 2009 10:05:33 -0500<BR>To: jay.krell@cornell.edu<BR>CC: m3devel@elegosoft.com<BR>Subject: Re: [M3devel] processing stack/context<BR><BR><BASE>
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<DIV><SPAN style="FONT-SIZE: medium" class=ecxApple-style-span><FONT class=ecxApple-style-span color=#0000ff face="'Gill Sans'">Actually, in the latest version I explicitly process the signal context as well as the stack.</FONT></SPAN></DIV></SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></DIV></SPAN></SPAN></DIV><BR>
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<DIV>On 3 Dec 2009, at 06:09, Jay K wrote:</DIV><BR class=ecxApple-interchange-newline>
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<DIV style="FONT-FAMILY: Verdana; FONT-SIZE: 10pt" class=ecxhmmessage>Tony, it looks like you assume the context passed to a signal handler is on the stack.<BR>Is that really guaranteed? It couldn't be in some thread local for some reason?<BR> (signals can nest? Therefore that would be problematic?)<BR>We can just use the address of a local, right?<BR> <BR>And we can assume the signal stack is the regular stack?<BR>By default?<BR>(I know sigstack/sigaltstack can fiddle with it; we should assume it isn't used.)<BR> <BR>I noticed this in structure ThreadWin32.m3 a bit more like ThreadPosix.m3.<BR> <BR> - Jay<BR></DIV></SPAN></BLOCKQUOTE></DIV><BR> </body>
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