[M3devel] New setjmp/longjmp problem.

[Antony Hosking]

Right, this is the problem I was talking about.  We need to fix the  
old POSIX implementation of Modula-3 threading to use use the  
makecontext call, and we should be using getcontext/setcontext for  
thread switching instead of setjmp/longjmp.  The new PTHREAD  
implementation of Modula-3 threading (which marries a Modula-3 thread  
to a system pthread) should work just fine.  I would suggest  
rebuilding m3core with the -DPTHREAD option to make it use pthread- 
based threading.

On 12/01/2007, at 12:04 AM, Mike Frysinger wrote:

> On Thursday 11 January 2007 17:40, Rodney M. Bates wrote:
>> The setjmp in glibc contains the line:
>>
>> 	xor    %gs:0x18,%ecx
>
> glibc has started mangling the thread stack poiner in newer  
> versions ... it's
> a "feature"
>
> see the PTR_MANGLE defines in the i386 dirs
> -mike
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Antony Hosking                | Associate Professor
Dept of Computer Sciences     | Office: (765) 494-6001
Purdue University             | Mobile: (765) 427-5484
250 N. University Street      | hosking at cs.purdue.edu
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