* re: Guile 1.8 and 86_64 gcc 4
@ 2006-04-14 14:31 Bill Schottstaedt
0 siblings, 0 replies; 4+ messages in thread
From: Bill Schottstaedt @ 2006-04-14 14:31 UTC (permalink / raw)
One more bit of info. The only change needed to get the build
to run to completion is to set SCM_DEBUG_CELL_ACCESSES to 1.
The resultant guile also runs without stack overflow.
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* re: Guile 1.8 and 86_64 gcc 4
@ 2006-04-14 15:58 Bill Schottstaedt
0 siblings, 0 replies; 4+ messages in thread
From: Bill Schottstaedt @ 2006-04-14 15:58 UTC (permalink / raw)
Or even simpler, just change the SCM_VALIDATE_CELL definition in
gc.h to:
#define SCM_VALIDATE_CELL(cell, expr) (scm_remember_upto_here(cell), (expr))
This is kinda fun!
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* re: Guile 1.8 and 86_64 gcc 4
@ 2006-04-14 18:18 Bill Schottstaedt
2006-04-15 0:57 ` Kevin Ryde
0 siblings, 1 reply; 4+ messages in thread
From: Bill Schottstaedt @ 2006-04-14 18:18 UTC (permalink / raw)
Actually the only cases that need the check are SCM_CELL_OBJECT_1 and
SCM_SET_CELL_OBJECT_0. But perhaps there's some way to embed that
asm business (in gc.h) into the SCM_VALIDATE_CELL macro.
I haven't used "asm" before, but here's a suggestion that seems to work:
#define SCM_VALIDATE_CELL(cell, expr) ({ __asm__ __volatile__ ("" : : "g" (cell)); expr; })
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* Re: Guile 1.8 and 86_64 gcc 4
2006-04-14 18:18 Bill Schottstaedt
@ 2006-04-15 0:57 ` Kevin Ryde
0 siblings, 0 replies; 4+ messages in thread
From: Kevin Ryde @ 2006-04-15 0:57 UTC (permalink / raw)
Cc: guile-devel
"Bill Schottstaedt" <bil@ccrma.Stanford.EDU> writes:
>
> #define SCM_VALIDATE_CELL(cell, expr) ({ __asm__ __volatile__ ("" : : "g" (cell)); expr; })
The asm version of scm_remember_upto_here_1 could be made into an
expression like that "({...})", as opposed to the current "statement"
style, if that helped make it usable in macros like this.
But I don't quite follow why a remember would be wanted in
SCM_VALIDATE_CELL. I'd have thought it was in fact a good thing if
the "cell" value went dead if not being checked.
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