diff options
Diffstat (limited to 'gdb/mcheck.c')
-rwxr-xr-x | gdb/mcheck.c | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/gdb/mcheck.c b/gdb/mcheck.c deleted file mode 100755 index 38b997a..0000000 --- a/gdb/mcheck.c +++ /dev/null @@ -1,124 +0,0 @@ -/* Standard debugging hooks for `malloc'. - Copyright 1990 Free Software Foundation - Written May 1989 by Mike Haertel. - - The author may be reached (Email) at the address mike@ai.mit.edu, - or (US mail) as Mike Haertel c/o Free Software Foundation. - -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., 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#include "ansidecl.h" -#define size_t unsigned int -#define ptrdiff_t int -#define NULL 0 -#define __ONEFILE -#include "gmalloc.h" - -/* Old hook values. */ -static void EXFUN((*old_free_hook), (PTR ptr)); -static PTR EXFUN((*old_malloc_hook), (size_t size)); -static PTR EXFUN((*old_realloc_hook), (PTR ptr, size_t size)); - - -/* Function to call when something awful happens. */ -extern void abort(); -static void EXFUN((*abortfunc), (NOARGS)) = (void (*)()) abort; - -/* Arbitrary magical numbers. */ -#define MAGICWORD 0xfedabeeb -#define MAGICBYTE ((char) 0xd7) - -struct hdr - { - size_t size; /* Exact size requested by user. */ - unsigned int magic; /* Magic number to check header integrity. */ - }; - -static void -DEFUN(checkhdr, (hdr), CONST struct hdr *hdr) -{ - if (hdr->magic != MAGICWORD || ((char *) &hdr[1])[hdr->size] != MAGICBYTE) - (*abortfunc)(); -} - -static void -DEFUN(freehook, (ptr), PTR ptr) -{ - struct hdr *hdr = ((struct hdr *) ptr) - 1; - checkhdr(hdr); - hdr->magic = 0; - __free_hook = old_free_hook; - free(hdr); - __free_hook = freehook; -} - -static PTR -DEFUN(mallochook, (size), size_t size) -{ - struct hdr *hdr; - - __malloc_hook = old_malloc_hook; - hdr = (struct hdr *) malloc(sizeof(struct hdr) + size + 1); - __malloc_hook = mallochook; - if (hdr == NULL) - return NULL; - - hdr->size = size; - hdr->magic = MAGICWORD; - ((char *) &hdr[1])[size] = MAGICBYTE; - return (PTR) (hdr + 1); -} - -static PTR -DEFUN(reallochook, (ptr, size), PTR ptr AND size_t size) -{ - struct hdr *hdr = ((struct hdr *) ptr) - 1; - - checkhdr(hdr); - __free_hook = old_free_hook; - __malloc_hook = old_malloc_hook; - __realloc_hook = old_realloc_hook; - hdr = (struct hdr *) realloc((PTR) hdr, sizeof(struct hdr) + size + 1); - __free_hook = freehook; - __malloc_hook = mallochook; - __realloc_hook = reallochook; - if (hdr == NULL) - return NULL; - - hdr->size = size; - ((char *) &hdr[1])[size] = MAGICBYTE; - return (PTR) (hdr + 1); -} - -void -DEFUN(mcheck, (func), void EXFUN((*func), (NOARGS))) -{ - static int mcheck_used = 0; - - if (func) - abortfunc = func; - - /* These hooks may not be safely inserted if malloc is already in use. */ - if (!__malloc_initialized && !mcheck_used) - { - old_free_hook = __free_hook; - __free_hook = freehook; - old_malloc_hook = __malloc_hook; - __malloc_hook = mallochook; - old_realloc_hook = __realloc_hook; - __realloc_hook = reallochook; - mcheck_used = 1; - } -} |