diff options
Diffstat (limited to 'mmalloc/mmtrace.c')
| -rw-r--r-- | mmalloc/mmtrace.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/mmalloc/mmtrace.c b/mmalloc/mmtrace.c deleted file mode 100644 index 563c860aff0..00000000000 --- a/mmalloc/mmtrace.c +++ /dev/null @@ -1,171 +0,0 @@ -/* More debugging hooks for `mmalloc'. - Copyright 1991, 1992, 1994 Free Software Foundation - - Written April 2, 1991 by John Gilmore of Cygnus Support - Based on mcheck.c by Mike Haertel. - Modified Mar 1992 by Fred Fish. (fnf@cygnus.com) - -This file is part of the GNU C Library. - -The GNU C Library is free software; you can redistribute it and/or -modify it under the terms of the GNU Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. - -The GNU C Library 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 -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ - -#include <stdio.h> -#include "mmprivate.h" - -static void tr_break PARAMS ((void)); -static void tr_freehook PARAMS ((PTR, PTR)); -static PTR tr_mallochook PARAMS ((PTR, size_t)); -static PTR tr_reallochook PARAMS ((PTR, PTR, size_t)); - -#ifndef __GNU_LIBRARY__ -extern char *getenv (); -#endif - -static FILE *mallstream; - -#if 0 /* FIXME: Disabled for now. */ -static char mallenv[] = "MALLOC_TRACE"; -static char mallbuf[BUFSIZ]; /* Buffer for the output. */ -#endif - -/* Address to breakpoint on accesses to... */ -static PTR mallwatch; - -/* Old hook values. */ - -static void (*old_mfree_hook) PARAMS ((PTR, PTR)); -static PTR (*old_mmalloc_hook) PARAMS ((PTR, size_t)); -static PTR (*old_mrealloc_hook) PARAMS ((PTR, PTR, size_t)); - -/* 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. */ - -static void -tr_break () -{ -} - -static void -tr_freehook (md, ptr) - PTR md; - PTR ptr; -{ - struct mdesc *mdp; - - mdp = MD_TO_MDP (md); - /* Be sure to print it first. */ - fprintf (mallstream, "- %08lx\n", (unsigned long) ptr); - if (ptr == mallwatch) - tr_break (); - mdp -> mfree_hook = old_mfree_hook; - mfree (md, ptr); - mdp -> mfree_hook = tr_freehook; -} - -static PTR -tr_mallochook (md, size) - PTR md; - size_t size; -{ - PTR hdr; - struct mdesc *mdp; - - mdp = MD_TO_MDP (md); - mdp -> mmalloc_hook = old_mmalloc_hook; - hdr = (PTR) mmalloc (md, size); - mdp -> mmalloc_hook = tr_mallochook; - - /* We could be printing a NULL here; that's OK. */ - fprintf (mallstream, "+ %08lx %x\n", (unsigned long) hdr, size); - - if (hdr == mallwatch) - tr_break (); - - return (hdr); -} - -static PTR -tr_reallochook (md, ptr, size) - PTR md; - PTR ptr; - size_t size; -{ - PTR hdr; - struct mdesc *mdp; - - mdp = MD_TO_MDP (md); - - if (ptr == mallwatch) - tr_break (); - - mdp -> mfree_hook = old_mfree_hook; - mdp -> mmalloc_hook = old_mmalloc_hook; - mdp -> mrealloc_hook = old_mrealloc_hook; - hdr = (PTR) mrealloc (md, ptr, size); - mdp -> mfree_hook = tr_freehook; - mdp -> mmalloc_hook = tr_mallochook; - mdp -> mrealloc_hook = tr_reallochook; - if (hdr == NULL) - /* Failed realloc. */ - fprintf (mallstream, "! %08lx %x\n", (unsigned long) ptr, size); - else - fprintf (mallstream, "< %08lx\n> %08lx %x\n", (unsigned long) ptr, - (unsigned long) hdr, size); - - if (hdr == mallwatch) - tr_break (); - - return hdr; -} - -/* We enable tracing if either the environment variable MALLOC_TRACE - is set, or if the variable mallwatch has been patched to an address - that the debugging user wants us to stop on. When patching mallwatch, - don't forget to set a breakpoint on tr_break! */ - -int -mmtrace () -{ -#if 0 /* FIXME! This is disabled for now until we figure out how to - maintain a stack of hooks per heap, since we might have other - hooks (such as set by mmcheck/mmcheckf) active also. */ - char *mallfile; - - mallfile = getenv (mallenv); - if (mallfile != NULL || mallwatch != NULL) - { - mallstream = fopen (mallfile != NULL ? mallfile : "/dev/null", "w"); - if (mallstream != NULL) - { - /* Be sure it doesn't mmalloc its buffer! */ - setbuf (mallstream, mallbuf); - fprintf (mallstream, "= Start\n"); - old_mfree_hook = mdp -> mfree_hook; - mdp -> mfree_hook = tr_freehook; - old_mmalloc_hook = mdp -> mmalloc_hook; - mdp -> mmalloc_hook = tr_mallochook; - old_mrealloc_hook = mdp -> mrealloc_hook; - mdp -> mrealloc_hook = tr_reallochook; - } - } - -#endif /* 0 */ - - return (1); -} - |