mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 03:03:31 +08:00
130 lines
3.3 KiB
C
Executable File
130 lines
3.3 KiB
C
Executable File
/* More debugging hooks for `malloc'.
|
|
Copyright 1991 Free Software Foundation
|
|
Written April 2, 1991 by John Gilmore of Cygnus Support
|
|
Based on mcheck.c by Mike Haertel.
|
|
|
|
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 1, 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.
|
|
|
|
The author may be reached (Email) at the address mike@ai.mit.edu,
|
|
or (US mail) as Mike Haertel c/o Free Software Foundation. */
|
|
|
|
#include <stdio.h>
|
|
#include "ansidecl.h"
|
|
#include <stdlib.h>
|
|
#include "gmalloc.h"
|
|
|
|
extern char *getenv();
|
|
|
|
FILE *mallstream;
|
|
char mallenv[] = "MALLOC_TRACE";
|
|
static char mallbuf[BUFSIZ]; /* Buffer for the output */
|
|
|
|
/* Address to breakpoint on accesses to... */
|
|
PTR mallwatch;
|
|
|
|
/* 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));
|
|
|
|
/* This function is called when the block being alloc'd, realloc'd, or
|
|
freed has an address matching the variable "mallwatch". In a debugger,
|
|
set "mallwatch" to the address of interest, then put a breakpoint on
|
|
tr_break. */
|
|
|
|
void
|
|
tr_break()
|
|
{
|
|
;
|
|
}
|
|
|
|
static void
|
|
DEFUN(tr_freehook, (ptr), PTR ptr)
|
|
{
|
|
fprintf(mallstream, "- %08x\n", ptr); /* Be sure to print it first */
|
|
if (ptr == mallwatch)
|
|
tr_break();
|
|
__free_hook = old_free_hook;
|
|
free(ptr);
|
|
__free_hook = tr_freehook;
|
|
}
|
|
|
|
static PTR
|
|
DEFUN(tr_mallochook, (size), size_t size)
|
|
{
|
|
PTR hdr;
|
|
|
|
__malloc_hook = old_malloc_hook;
|
|
hdr = malloc(size);
|
|
__malloc_hook = tr_mallochook;
|
|
|
|
/* We could be printing a NULL here; that's OK */
|
|
fprintf (mallstream, "+ %08x %x\n", hdr, size);
|
|
|
|
if (hdr == mallwatch)
|
|
tr_break();
|
|
|
|
return hdr;
|
|
}
|
|
|
|
static PTR
|
|
DEFUN(tr_reallochook, (ptr, size), PTR ptr AND size_t size)
|
|
{
|
|
PTR hdr;
|
|
|
|
if (ptr == mallwatch)
|
|
tr_break();
|
|
|
|
__free_hook = old_free_hook;
|
|
__malloc_hook = old_malloc_hook;
|
|
__realloc_hook = old_realloc_hook;
|
|
hdr = realloc(ptr, size);
|
|
__free_hook = tr_freehook;
|
|
__malloc_hook = tr_mallochook;
|
|
__realloc_hook = tr_reallochook;
|
|
if (hdr == NULL) {
|
|
fprintf (mallstream, "! %08x %x\n", ptr, size); /* Failed realloc */
|
|
} else {
|
|
fprintf (mallstream, "< %08x\n> %08x %x\n", ptr, hdr, size);
|
|
}
|
|
|
|
if (hdr == mallwatch)
|
|
tr_break();
|
|
|
|
return hdr;
|
|
}
|
|
|
|
void
|
|
mtrace()
|
|
{
|
|
char *mallfile;
|
|
|
|
mallfile = getenv (mallenv);
|
|
if (mallfile) {
|
|
mallstream = fopen (mallfile, "w");
|
|
if (mallstream) {
|
|
/* Be sure it doesn't malloc its buffer! */
|
|
setbuf (mallstream, mallbuf);
|
|
fprintf (mallstream, "= Start\n");
|
|
old_free_hook = __free_hook;
|
|
__free_hook = tr_freehook;
|
|
old_malloc_hook = __malloc_hook;
|
|
__malloc_hook = tr_mallochook;
|
|
old_realloc_hook = __realloc_hook;
|
|
__realloc_hook = tr_reallochook;
|
|
}
|
|
}
|
|
}
|