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bump default stack limit to 160000 words

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* libguile/eval.c (scm_debug_opts): Up the default stack limit by a
  factor of 4. Psyntax expansions currently bounce back and forth between
  the VM and the interpreter, due to `map'. (Hopefully that won't be the
  case in the future, when have map in scheme, and we get an inliner.)
  Anyway when expanding a big nested expression, as for example in
  (language ecmascript compile-ghil) -- the pmatch code ends up being
  super-nested -- we can consume loads o stack.

  So given that on desktop machines, where rlimit is likely to be unset,
  default rlimits are around 8 or 10 MB or so, let's bump up our default
  limit to 640KB (on 32-bit). Should be enough for anyone.

  See http://thread.gmane.org/gmane.lisp.guile.devel/8599/focus=8662 for
  more info. Thanks to Mark H. Weaver for the diagnosis!
This commit is contained in:
Andy Wingo 2009-06-10 10:51:02 +02:00
parent 9ea12179ff
commit de3d1fc988
1 changed files with 12 additions and 1 deletions
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13
libguile/eval.c
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@ -3028,8 +3028,19 @@ scm_t_option scm_debug_opts[] = {
{ SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." },
{ SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." },
{ SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." },
/* This default stack limit will be overridden by debug.c:init_stack_limit(),
if we have getrlimit() and the stack limit is not INFINITY. But it is still
important, as some systems have both the soft and the hard limits set to
INFINITY; in that case we fall back to this value.
{ SCM_OPTION_INTEGER, "stack", 40000, "Stack size limit (measured in words; 0 = no check)." },
The situation is aggravated by certain compilers, which can consume
"beaucoup de stack", as they say in France.
See http://thread.gmane.org/gmane.lisp.guile.devel/8599/focus=8662 for
more discussion. This setting is 640 KB on 32-bit arches (should be enough
for anyone!) or a whoppin' 1280 KB on 64-bit arches.
*/
{ SCM_OPTION_INTEGER, "stack", 160000, "Stack size limit (measured in words; 0 = no check)." },
{ SCM_OPTION_SCM, "show-file-name", (unsigned long)SCM_BOOL_T,
"Show file names and line numbers "
"in backtraces when not `#f'. A value of `base' "