From c2b22e08bd48278f2cf125f054c9f6286e345ff0 Mon Sep 17 00:00:00 2001 From: Manoj Srivastava Date: Wed, 3 Dec 2003 22:33:17 -0800 Subject: Imported Upstream version 2.5.31 --- tests/test-mem-r/scanner.l | 182 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 182 insertions(+) create mode 100644 tests/test-mem-r/scanner.l (limited to 'tests/test-mem-r/scanner.l') diff --git a/tests/test-mem-r/scanner.l b/tests/test-mem-r/scanner.l new file mode 100644 index 0000000..c478edf --- /dev/null +++ b/tests/test-mem-r/scanner.l @@ -0,0 +1,182 @@ +/* + * This file is part of flex. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE. + */ + +%{ +/* A template scanner file to build "scanner.c". + * The whole idea is to cause memory realloc by + * 1. pushing a lot on the condition stack, and + * 2. eating input greater than YY_BUF_SIZE + */ +#include +#include +#include "config.h" + +/* Insanely small read buffer. This pretty much guarantees at least one realloc. */ +#ifdef YY_BUF_SIZE +#undef YY_BUF_SIZE +#endif +#define YY_BUF_SIZE 8 + +%} + +%option 8bit outfile="scanner.c" prefix="test" +%option nounput nomain noyywrap +%option warn stack nodefault reentrant +%option noyyalloc noyyrealloc noyyfree + +%x parens + +%% + +{ +"(" { printf("yy_push_state(parens)\n"); yy_push_state(parens,yyscanner); } +len=[0-9]+ { printf("About read token where %s\n",yytext); } +0+ { } +.|\n { } +} + +{ +"(" { printf("yy_push_state(parens)\n"); yy_push_state(parens,yyscanner); } +")" { printf("yy_pop_state()\n");yy_pop_state(yyscanner);} +[^()\n]+ { } +.|\n { } +} + +%% +/* total memory allocated */ +static size_t total_mem=0; + +/* track the amount of memory for ptr. */ +struct memsz { + void* p; + size_t sz; +}; + +static struct memsz * ptrs=0; /* Array of pairs. */ +static int nptrs=0; /* Number of pairs in array. */ +static int arrsz=0; /* Capacity of array. */ + +static void dump_mem(FILE* fp){ + int i; + fprintf(fp,"\tptrs[%d] = {", nptrs); + for (i=0; i < arrsz; i++) + fprintf(fp," {%#lx,%ld},", (long)ptrs[i].p, (long)ptrs[i].sz); + + fprintf(fp,"}\n"); +} + +void * yyalloc(yy_size_t n , void* yyscanner) +{ + void * p; + struct memsz * old; + int i; + + total_mem += n; + p = (void*)malloc(n); + + if( nptrs >= arrsz){ + /* increase array size by 1 */ + arrsz++; + ptrs = (struct memsz*)realloc( ptrs, arrsz * sizeof(struct memsz)); + ptrs[nptrs].p = 0; + ptrs[nptrs].sz = 0; + } + + /* find a null slot */ + for(i=0; i < arrsz ; i++) + if (ptrs[i].p == 0) { + ptrs[i].p = p; + ptrs[i].sz = n; + } + + nptrs++; + printf("yyflex_alloc(%8ld) total=%8ld return=%#10lx\n",(long)n,(long)total_mem,(long)p); + dump_mem(stdout); + return p; +} + +void * yyrealloc(void* p, yy_size_t n , void* yyscanner) +{ + int i; + for (i=0; i < arrsz; i++) + if ( ptrs[i].p == p){ + total_mem -= ptrs[i].sz; + total_mem += n; + ptrs[i].p = (void*)realloc(p,n); + ptrs[i].sz = n; + + printf("yyflex_realloc(%#10lx,%8ld) total=%8ld return=%8lx\n", + (long)p,(long)n,(long)total_mem,(long)ptrs[i].p); + dump_mem(stdout); + return ptrs[i].p; + } + + fprintf(stderr,"ERROR: yyflex_realloc could not locate pointer %#lx.\n",(long)p); + dump_mem(stdout); + exit(1); +} + +void yyfree(void* p , void* yyscanner) +{ + int i; + for (i=0; i < arrsz; i++) + if ( ptrs[i].p == p){ + total_mem -= ptrs[i].sz; + free(p); + ptrs[i].p = 0; + ptrs[i].sz = 0; + nptrs--; + printf("yyflex_free(%#10lx) total=%8ld\n",(long)p,(long)total_mem); + dump_mem(stdout); + return; + } + + fprintf(stderr,"ERROR: yyflex_free could not locate pointer %#lx.\n",(long)p); + dump_mem(stdout); + exit(1); +} + +int main(void); + +int +main () +{ + yyscan_t scanner; + arrsz = 1; + ptrs = (struct memsz*)calloc(1,sizeof(struct memsz)); + nptrs = 0; + + yylex_init(&scanner); + yyset_in(stdin,scanner); + yyset_out(stdout,scanner); + yylex(scanner); + yylex_destroy(scanner); + free(ptrs); + + if ( nptrs > 0 || total_mem > 0){ + fprintf(stderr,"Oops. Looks like a memory leak: nptrs=%d, unfreed memory=%ld\n",nptrs,(long)total_mem); + exit(1); + } + printf("TEST RETURNING OK.\n"); + return 0; +} -- cgit v1.2.3