调用的记录,这些函数包括:malloc、calloc、realloc、free。
/*************************************************************************** memleak.h: Redirects calls to the functions defined in memleak.c Copyright (c) 2005, 2008 Stanislav Maslovski. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ************************************************************************* Include this file into the module you want to debug for memory leaks. IMPORTANT: ========== If you do not want to catch ramdom segfaults make sure that this file gets included in _every_ module which uses malloc(), free() and friends. Only if you know that the blocks allocated in a particular module will never be freed or reallocated in any other module you may include this file only in that module. For additional information see memleak.c */ #ifndef H_MEMLEAK_H #define H_MEMLEAK_H /* this makes sure that stdlib.h gets included before our macros */ #include <stdlib.h> extern char *dbg_file_name; extern unsigned long dbg_line_number; #define CHK_FREED 1 #define CHK_ALLOC 2 #define CHK_ALL (CHK_FREED | CHK_ALLOC) extern void *dbg_malloc(size_t size); extern void *dbg_realloc(void *ptr, size_t size); extern void *dbg_calloc(size_t num, size_t size); extern void dbg_free(void *ptr); extern void dbg_init(int history_length); extern int dbg_check_addr(char *msg, void *ptr, int opt); extern void dbg_mem_stat(void); extern void dbg_zero_stat(void); extern void dbg_abort(char *msg); extern void dbg_heap_dump(char *keyword); extern void dbg_history_dump(char *keyword); extern void dbg_catch_sigsegv(void); #define FILE_LINE dbg_file_name = __FILE__, dbg_line_number = __LINE__ #define malloc(s) (FILE_LINE, dbg_malloc(s)) #define realloc(p, s) (FILE_LINE, dbg_realloc(p, s)) #define calloc(n, s) (FILE_LINE, dbg_calloc(n, s)) #define free(p) (FILE_LINE, dbg_free(p)) #define dbg_init(n) (FILE_LINE, dbg_init(n)) #define dbg_check_addr(m, p, o) (FILE_LINE, dbg_check_addr(m, p, o)) #define dbg_mem_stat() (FILE_LINE, dbg_mem_stat()) #define dbg_zero_stat() (FILE_LINE, dbg_zero_stat()) #define dbg_abort(m) (FILE_LINE, dbg_abort(m)) #define dbg_heap_dump(k) (FILE_LINE, dbg_heap_dump(k)) #define dbg_history_dump(k) (FILE_LINE, dbg_history_dump(k)) #define dbg_catch_sigsegv() (FILE_LINE, dbg_catch_sigsegv()) #ifdef WITH_DBG_STRDUP /* this makes sure that string.h gets included before our macros */ #include <string.h> extern char *dbg_strdup(const char *s); extern char *dbg_strndup(const char *s, size_t n); #define strdup(s) (FILE_LINE, dbg_strdup(s)) #define strndup(s, n) (FILE_LINE, dbg_strndup(s, n)) #endif #endif
#include <stdlib.h> #include <stdio.h> #include <unistd.h> #include "memleak.h" int main() { void *a,*b,*c; char *s; dbg_init(10); dbg_catch_sigsegv(); a = malloc(1000); b = malloc(30); a = realloc(a, 150); c = calloc(90, 3); b = realloc(b, 0); malloc(0); calloc(0, 10); realloc(0, 10); realloc(a, 0); free(0); s = strdup("A string."); s = strndup(s, 5); puts(s); dbg_mem_stat(); dbg_heap_dump(""); return 0; }