diff options
Diffstat (limited to 'gcc/c-parse.in')
| -rw-r--r-- | gcc/c-parse.in | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/gcc/c-parse.in b/gcc/c-parse.in index ff279a1..679d42d 100644 --- a/gcc/c-parse.in +++ b/gcc/c-parse.in @@ -61,6 +61,49 @@ end ifobjc /* Like YYERROR but do call yyerror. */ #define YYERROR1 { yyerror ("syntax error"); YYERROR; } + +/* Like the default stack expander, except (1) use realloc when possible, + (2) impose no hard maxiumum on stack size, (3) REALLY do not use alloca. + + Irritatingly, YYSTYPE is defined after this %{ %} block, so we cannot + give malloced_yyvs its proper type. This is ok since all we need from + it is to be able to free it. */ + +static short *malloced_yyss; +static void *malloced_yyvs; + +#define yyoverflow(MSG, SS, SSSIZE, VS, VSSIZE, YYSSZ) \ +do { \ + size_t newsize; \ + short *newss; \ + YYSTYPE *newvs; \ + newsize = *(YYSSZ) *= 2; \ + if (malloced_yyss) \ + { \ + newss = (short *) \ + really_call_realloc (*(SS), newsize * sizeof (short)); \ + newvs = (YYSTYPE *) \ + really_call_realloc (*(VS), newsize * sizeof (YYSTYPE)); \ + } \ + else \ + { \ + newss = (short *) really_call_malloc (newsize * sizeof (short)); \ + newvs = (YYSTYPE *) really_call_malloc (newsize * sizeof (YYSTYPE)); \ + if (newss) \ + memcpy (newss, *(SS), (SSSIZE)); \ + if (newvs) \ + memcpy (newvs, *(VS), (VSSIZE)); \ + } \ + if (!newss || !newvs) \ + { \ + yyerror (MSG); \ + return 2; \ + } \ + *(SS) = newss; \ + *(VS) = newvs; \ + malloced_yyss = newss; \ + malloced_yyvs = (void *) newvs; \ +} while (0) %} %start program @@ -3908,3 +3951,15 @@ make_pointer_declarator (type_quals_attrs, target) itarget = tree_cons (attrs, target, NULL_TREE); return build1 (INDIRECT_REF, quals, itarget); } + +/* Free malloced parser stacks if necessary. */ + +void +free_parser_stacks () +{ + if (malloced_yyss) + { + free (malloced_yyss); + free (malloced_yyvs); + } +} |