/* * 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 #if BSD >= 43 #include #else #include #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