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Ignore YYSTACK_USE_ALLOCA for push parsers since the stacks can't be

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locals.  Reported by Juan Manuel Guerrero at
<http://lists.gnu.org/archive/html/bug-bison/2007-01/msg00000.html>.
* data/push.c: Enclose the #ifdef YYSTACK_USE_ALLOCA in b4_push_if.
Fix some indentation also.
* tests/torture.at (Exploding the Stack Size with Alloca): Add comment
explaining this issue.
This commit is contained in:
Joel E. Denny
2007-01-10 00:50:55 +00:00
parent 8f7ebfc81f
commit 78143faa16
3 changed files with 26 additions and 11 deletions
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10
ChangeLog
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@@ -1,3 +1,13 @@
2007-01-09 Joel E. Denny <jdenny@ces.clemson.edu>
Ignore YYSTACK_USE_ALLOCA for push parsers since the stacks can't be
locals. Reported by Juan Manuel Guerrero at
<http://lists.gnu.org/archive/html/bug-bison/2007-01/msg00000.html>.
* data/push.c: Enclose the #ifdef YYSTACK_USE_ALLOCA in b4_push_if.
Fix some indentation also.
* tests/torture.at (Exploding the Stack Size with Alloca): Add comment
explaining this issue.
2007-01-09 Paolo Bonzini <bonzini@gnu.org>
and Joel E. Denny <jdenny@ces.clemson.edu>

6
data/push.c
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@@ -332,7 +332,8 @@ typedef short int yytype_int16;
#if ! defined yyoverflow || YYERROR_VERBOSE
/* The parser invokes alloca or malloc; define the necessary symbols. */
]b4_push_if([],
[[/* The parser invokes alloca or malloc; define the necessary symbols. */
# ifdef YYSTACK_USE_ALLOCA
# if YYSTACK_USE_ALLOCA
@@ -357,7 +358,8 @@ typedef short int yytype_int16;
# endif
# endif
# ifdef YYSTACK_ALLOC
]])dnl
[# ifdef YYSTACK_ALLOC
/* Pacify GCC's `empty if-body' warning. */
# define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
# ifndef YYSTACK_ALLOC_MAXIMUM

3
tests/torture.at
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@@ -490,6 +490,9 @@ AT_PARSER_CHECK([./input 900], 0, [], [ignore])
# multiply by two starting at 200 => 5120 is the last possible).
AT_PARSER_CHECK([./input 10000], 2, [], [ignore])
# The push parser can't use alloca since the stacks can't be locals. This test
# just helps guarantee we don't let the YYSTACK_USE_ALLOCA feature affect
# push parsers.
AT_DATA_STACK_TORTURE([AT_USE_ALLOCA],
[[%push-pull-parser
]])