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add GUILE_STACK_SIZE environment variable

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* libguile/vm.c (initialize_default_stack_size): New helper.
  (scm_bootstrap_vm): Call initialize_default_stack_size.

* doc/ref/guile-invoke.texi (Environment Variables): Add docs.

Based on a patch by Stefan Israelsson Tampe.
This commit is contained in:
Stefan Israelsson Tampe 2012-12-12 17:37:44 +01:00 • committed by Andy Wingo
parent d0ecf8eb9e
commit aab9d46c83
2 changed files with 28 additions and 2 deletions
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12
doc/ref/guile-invoke.texi
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@ -307,6 +307,18 @@ characters. However, for compatibility with previous Guile 2.0
releases, this option is off by default. The next stable release series
of Guile (the 2.2 series) will install locales by default.
@item GUILE_STACK_SIZE
@vindex GUILE_STACK_SIZE
Guile currently has a limited stack size for Scheme computations.
Attempting to call too many nested functions will signal an error. This
is good to detect infinite recursion, but sometimes the limit is reached
for normal computations. This environment variable, if set to a
positive integer, specifies the number of Scheme value slots to allocate
for the stack.
In the future we will implement stacks that can grow and shrink, but for
now this hack will have to do.
@item GUILE_LOAD_COMPILED_PATH
@vindex GUILE_LOAD_COMPILED_PATH
This variable may be used to augment the path that is searched for

18
libguile/vm.c
View file

@ -1,4 +1,4 @@
/* Copyright (C) 2001, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
/* Copyright (C) 2001, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@ -37,6 +37,8 @@
#include "programs.h"
#include "vm.h"
#include "private-gc.h" /* scm_getenv_int */
static int vm_default_engine = SCM_VM_REGULAR_ENGINE;
/* Unfortunately we can't snarf these: snarfed things are only loaded up from
@ -633,7 +635,17 @@ resolve_variable (SCM what, SCM program_module)
}
}
#define VM_MIN_STACK_SIZE (1024)
#define VM_DEFAULT_STACK_SIZE (64 * 1024)
static size_t vm_stack_size = VM_DEFAULT_STACK_SIZE;
static void
initialize_default_stack_size (void)
{
int size = scm_getenv_int ("GUILE_STACK_SIZE", vm_stack_size);
if (size >= VM_MIN_STACK_SIZE)
vm_stack_size = size;
}
#define VM_NAME vm_regular_engine
#define FUNC_NAME "vm-regular-engine"
@ -670,7 +682,7 @@ make_vm (void)
vp = scm_gc_malloc (sizeof (struct scm_vm), "vm");
vp->stack_size = VM_DEFAULT_STACK_SIZE;
vp->stack_size= vm_stack_size;
#ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN
vp->stack_base = (SCM *)
@ -1086,6 +1098,8 @@ scm_bootstrap_vm (void)
"scm_init_vm",
(scm_t_extension_init_func)scm_init_vm, NULL);
initialize_default_stack_size ();
sym_vm_run = scm_from_latin1_symbol ("vm-run");
sym_vm_error = scm_from_latin1_symbol ("vm-error");
sym_keyword_argument_error = scm_from_latin1_symbol ("keyword-argument-error");