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/*
* S T O R A G E . C
*
* Ray Tracing program, storage manager.
*
* Functions -
* rt_malloc Allocate storage, with visibility & checking
* rt_free Similarly, free storage
* rt_prmem When debugging, print memory map
* calloc, cfree Which call rt_malloc, rt_free
*
* Author -
* Michael John Muuss
*
* Source -
* SECAD/VLD Computing Consortium, Bldg 394
* The U. S. Army Ballistic Research Laboratory
* Aberdeen Proving Ground, Maryland 21005-5066
*
* Copyright Notice -
* This software is Copyright (C) 1987 by the United States Army.
* All rights reserved.
*/
#ifndef lint
static char rcsid[] = "$Id: storage.c,v 1.1 1995/10/18 08:47:51 deraadt Exp $";
#endif
#include <sys/param.h>
#if BSD >= 43
#include <sys/syslog.h>
#else
#include <stdio.h>
#define LOG_ERR 0
#endif BSD
#undef malloc
#undef free
#define MDB_SIZE 20000
#define MDB_MAGIC 0x12348969
struct memdebug {
char *mdb_addr;
char *mdb_str;
int mdb_len;
} rt_mdb[MDB_SIZE];
/*
* R T _ M A L L O C
*/
char *
rt_malloc(cnt)
unsigned int cnt;
{
register char *ptr;
extern char *malloc();
cnt = (cnt+2*sizeof(int)-1)&(~(sizeof(int)-1));
ptr = malloc(cnt);
if( ptr==(char *)0 ) {
syslog(LOG_ERR, "rt_malloc: malloc failure");
abort();
} else {
register struct memdebug *mp = rt_mdb;
for( ; mp < &rt_mdb[MDB_SIZE]; mp++ ) {
if( mp->mdb_len > 0 ) continue;
mp->mdb_addr = ptr;
mp->mdb_len = cnt;
mp->mdb_str = "???";
goto ok;
}
syslog(LOG_ERR, "rt_malloc: memdebug overflow\n");
}
ok: ;
{
register int *ip = (int *)(ptr+cnt-sizeof(int));
*ip = MDB_MAGIC;
}
return(ptr);
}
/*
* R T _ F R E E
*/
void
rt_free(ptr)
char *ptr;
{
register struct memdebug *mp = rt_mdb;
for( ; mp < &rt_mdb[MDB_SIZE]; mp++ ) {
if( mp->mdb_len <= 0 ) continue;
if( mp->mdb_addr != ptr ) continue;
{
register int *ip = (int *)(ptr+mp->mdb_len-sizeof(int));
if( *ip != MDB_MAGIC ) {
syslog(LOG_ERR, "ERROR rt_free(x%x, %s) corrupted! x%x!=x%x\n", ptr, "???", *ip, MDB_MAGIC);
abort();
}
}
mp->mdb_len = 0; /* successful free */
goto ok;
}
syslog(LOG_ERR, "ERROR rt_free(x%x, %s) bad pointer!\n", ptr, "???");
abort();
ok: ;
*((int *)ptr) = -1; /* zappo! */
free(ptr);
}
/*
* R T _ P R M E M
*
* Print map of memory currently in use.
*/
void
rt_prmem(str)
char *str;
{
register struct memdebug *mp = rt_mdb;
register int *ip;
printf("\nRT memory use\t\t%s\n", str);
for( ; mp < &rt_mdb[MDB_SIZE]; mp++ ) {
if( mp->mdb_len <= 0 ) continue;
ip = (int *)(mp->mdb_addr+mp->mdb_len-sizeof(int));
printf("%7x %5x %s %s\n",
mp->mdb_addr, mp->mdb_len, mp->mdb_str,
*ip!=MDB_MAGIC ? "-BAD-" : "" );
if( *ip != MDB_MAGIC )
printf("\t%x\t%x\n", *ip, MDB_MAGIC);
}
}
char *
calloc(num, size)
register unsigned num, size;
{
extern char *malloc();
register char *p;
size *= num;
if (p = rt_malloc(size))
bzero(p, size);
return (p);
}
cfree(p, num, size)
char *p;
unsigned num;
unsigned size;
{
rt_free(p);
}
#if BSD < 43
openlog() {}
syslog(x, str, a, b, c, d, e, f)
int x;
char *str;
int a, b, c, d, e, f;
{
fprintf(stderr, str, a, b, c, d, e, f);
}
#endif BSD
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