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/*
* libc/stdlib/malloc/malloc_debug.c -- malloc debugging support
*
* Copyright (C) 2002 NEC Corporation
* Copyright (C) 2002 Miles Bader <miles@gnu.org>
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License. See the file COPYING.LIB in the main
* directory of this archive for more details.
*
* Written by Miles Bader <miles@gnu.org>
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <stdarg.h>
#include "malloc.h"
#include "heap.h"
int __malloc_debug = 0, __malloc_check = 0;
#ifdef MALLOC_MMB_DEBUGGING
int __malloc_mmb_debug = 0;
#endif
/* Debugging output is indented this may levels. */
int __malloc_debug_cur_indent = 0;
/* Print FMT and args indented at the current debug print level, followed
by a newline, and change the level by INDENT. */
void
__malloc_debug_printf (int indent, const char *fmt, ...)
{
unsigned spaces = __malloc_debug_cur_indent * MALLOC_DEBUG_INDENT_SIZE;
va_list val;
while (spaces > 0)
{
putc (' ', stderr);
spaces--;
}
va_start (val, fmt);
vfprintf (stderr, fmt, val);
va_end (val);
putc ('\n', stderr);
__malloc_debug_indent (indent);
}
void
__malloc_debug_init (void)
{
char *ev = __getenv ("MALLOC_DEBUG");
if (ev)
{
int val = atoi (ev);
if (val & 1)
__malloc_check = 1;
if (val & 2)
__malloc_debug = 1;
#ifdef MALLOC_MMB_DEBUGGING
if (val & 4)
__malloc_mmb_debug = 1;
#endif
#ifdef HEAP_DEBUGGING
if (val & 8)
__heap_debug = 1;
#endif
if (val)
__malloc_debug_printf
(0, "malloc_debug: initialized to %d (check = %d, dump = %d, dump_mmb = %d, dump_heap = %d)",
val,
!!(val & 1), !!(val & 2),
!!(val & 4), !!(val & 8));
}
}
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