Oops, we don't need NetBSD's malloc 'cause we can turn off utrace

in phk's malloc.

2 files changed, 2 insertions, 438 deletions

diff --git a/lib/libc/alpha/stdlib/Makefile.inc b/lib/libc/alpha/stdlib/Makefile.inc
index 00a4831..f8520660 100644
--- a/lib/libc/alpha/stdlib/Makefile.inc
+++ b/lib/libc/alpha/stdlib/Makefile.inc
@@ -1,3 +1,3 @@
-#	$Id$
+#	$Id: Makefile.inc,v 1.1.1.1 1998/03/09 06:34:41 jb Exp $
 
-MDSRCS+=	abs.c div.c labs.c ldiv.c netbsd_malloc.c
+MDSRCS+=	abs.c div.c labs.c ldiv.c
diff --git a/lib/libc/alpha/stdlib/netbsd_malloc.c b/lib/libc/alpha/stdlib/netbsd_malloc.c
deleted file mode 100644
index 98d35bf..0000000
--- a/lib/libc/alpha/stdlib/netbsd_malloc.c
+++ /dev/null
@@ -1,436 +0,0 @@
-/* $Id$
-/*	From: NetBSD: malloc.c,v 1.10 1997/07/21 14:08:55 jtc Exp */
-
-/*
- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *	This product includes software developed by the University of
- *	California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-
-/*
- * malloc.c (Caltech) 2/21/82
- * Chris Kingsley, kingsley@cit-20.
- *
- * This is a very fast storage allocator.  It allocates blocks of a small 
- * number of different sizes, and keeps free lists of each size.  Blocks that
- * don't exactly fit are passed up to the next larger size.  In this 
- * implementation, the available sizes are 2^n-4 (or 2^n-10) bytes long.
- * This is designed for use in a virtual memory environment.
- */
-
-/* include "namespace.h" */
-#if defined(DEBUG) || defined(RCHECK) || defined(MSTATS)
-#include <stdio.h>
-#endif
-#include <sys/types.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#define	NULL 0
-
-
-/*
- * The overhead on a block is at least 4 bytes.  When free, this space
- * contains a pointer to the next free block, and the bottom two bits must
- * be zero.  When in use, the first byte is set to MAGIC, and the second
- * byte is the size index.  The remaining bytes are for alignment.
- * If range checking is enabled then a second word holds the size of the
- * requested block, less 1, rounded up to a multiple of sizeof(RMAGIC).
- * The order of elements is critical: ov_magic must overlay the low order
- * bits of ov_next, and ov_magic can not be a valid ov_next bit pattern.
- */
-union	overhead {
-	union	overhead *ov_next;	/* when free */
-	struct {
-		u_char	ovu_magic;	/* magic number */
-		u_char	ovu_index;	/* bucket # */
-#ifdef RCHECK
-		u_short	ovu_rmagic;	/* range magic number */
-		u_long	ovu_size;	/* actual block size */
-#endif
-	} ovu;
-#define	ov_magic	ovu.ovu_magic
-#define	ov_index	ovu.ovu_index
-#define	ov_rmagic	ovu.ovu_rmagic
-#define	ov_size		ovu.ovu_size
-};
-
-#define	MAGIC		0xef		/* magic # on accounting info */
-#define RMAGIC		0x5555		/* magic # on range info */
-
-#ifdef RCHECK
-#define	RSLOP		sizeof (u_short)
-#else
-#define	RSLOP		0
-#endif
-
-/*
- * nextf[i] is the pointer to the next free block of size 2^(i+3).  The
- * smallest allocatable block is 8 bytes.  The overhead information
- * precedes the data area returned to the user.
- */
-#define	NBUCKETS 30
-static	union overhead *nextf[NBUCKETS];
-
-static	int pagesz;			/* page size */
-static	int pagebucket;			/* page size bucket */
-
-#ifdef MSTATS
-/*
- * nmalloc[i] is the difference between the number of mallocs and frees
- * for a given block size.
- */
-static	u_int nmalloc[NBUCKETS];
-#include <stdio.h>
-#endif
-
-static void morecore __P((int));
-static int findbucket __P((union overhead *, int));
-#ifdef MSTATS
-void mstats __P((char *));
-#endif
-
-#if defined(DEBUG) || defined(RCHECK)
-#define	ASSERT(p)   if (!(p)) botch(__STRING(p))
-
-static botch __P((char *));
-
-static
-botch(s)
-	char *s;
-{
-	fprintf(stderr, "\r\nassertion botched: %s\r\n", s);
- 	(void) fflush(stderr);		/* just in case user buffered it */
-	abort();
-}
-#else
-#define	ASSERT(p)
-#endif
-
-void *
-malloc(nbytes)
-	size_t nbytes;
-{
-  	register union overhead *op;
-	register int bucket;
-  	register long n;
-	register unsigned amt;
-
-	/*
-	 * First time malloc is called, setup page size and
-	 * align break pointer so all data will be page aligned.
-	 */
-	if (pagesz == 0) {
-		pagesz = n = getpagesize();
-		op = (union overhead *)sbrk(0);
-  		n = n - sizeof (*op) - ((long)op & (n - 1));
-		if (n < 0)
-			n += pagesz;
-  		if (n) {
-  			if (sbrk(n) == (char *)-1)
-				return (NULL);
-		}
-		bucket = 0;
-		amt = 8;
-		while (pagesz > amt) {
-			amt <<= 1;
-			bucket++;
-		}
-		pagebucket = bucket;
-	}
-	/*
-	 * Convert amount of memory requested into closest block size
-	 * stored in hash buckets which satisfies request.
-	 * Account for space used per block for accounting.
-	 */
-	if (nbytes <= (n = pagesz - sizeof (*op) - RSLOP)) {
-#ifndef RCHECK
-		amt = 8;	/* size of first bucket */
-		bucket = 0;
-#else
-		amt = 16;	/* size of first bucket */
-		bucket = 1;
-#endif
-		n = -((long)sizeof (*op) + RSLOP);
-	} else {
-		amt = pagesz;
-		bucket = pagebucket;
-	}
-	while (nbytes > amt + n) {
-		amt <<= 1;
-		if (amt == 0)
-			return (NULL);
-		bucket++;
-	}
-	/*
-	 * If nothing in hash bucket right now,
-	 * request more memory from the system.
-	 */
-  	if ((op = nextf[bucket]) == NULL) {
-  		morecore(bucket);
-  		if ((op = nextf[bucket]) == NULL)
-  			return (NULL);
-	}
-	/* remove from linked list */
-  	nextf[bucket] = op->ov_next;
-	op->ov_magic = MAGIC;
-	op->ov_index = bucket;
-#ifdef MSTATS
-  	nmalloc[bucket]++;
-#endif
-#ifdef RCHECK
-	/*
-	 * Record allocated size of block and
-	 * bound space with magic numbers.
-	 */
-	op->ov_size = (nbytes + RSLOP - 1) & ~(RSLOP - 1);
-	op->ov_rmagic = RMAGIC;
-  	*(u_short *)((caddr_t)(op + 1) + op->ov_size) = RMAGIC;
-#endif
-  	return ((char *)(op + 1));
-}
-
-/*
- * Allocate more memory to the indicated bucket.
- */
-static void
-morecore(bucket)
-	int bucket;
-{
-  	register union overhead *op;
-	register long sz;		/* size of desired block */
-  	long amt;			/* amount to allocate */
-  	int nblks;			/* how many blocks we get */
-
-	/*
-	 * sbrk_size <= 0 only for big, FLUFFY, requests (about
-	 * 2^30 bytes on a VAX, I think) or for a negative arg.
-	 */
-	sz = 1 << (bucket + 3);
-#ifdef DEBUG
-	ASSERT(sz > 0);
-#else
-	if (sz <= 0)
-		return;
-#endif
-	if (sz < pagesz) {
-		amt = pagesz;
-  		nblks = amt / sz;
-	} else {
-		amt = sz + pagesz;
-		nblks = 1;
-	}
-	op = (union overhead *)sbrk(amt);
-	/* no more room! */
-  	if ((long)op == -1)
-  		return;
-	/*
-	 * Add new memory allocated to that on
-	 * free list for this hash bucket.
-	 */
-  	nextf[bucket] = op;
-  	while (--nblks > 0) {
-		op->ov_next = (union overhead *)((caddr_t)op + sz);
-		op = (union overhead *)((caddr_t)op + sz);
-  	}
-}
-
-void
-free(cp)
-	void *cp;
-{   
-  	register long size;
-	register union overhead *op;
-
-  	if (cp == NULL)
-  		return;
-	op = (union overhead *)((caddr_t)cp - sizeof (union overhead));
-#ifdef DEBUG
-  	ASSERT(op->ov_magic == MAGIC);		/* make sure it was in use */
-#else
-	if (op->ov_magic != MAGIC)
-		return;				/* sanity */
-#endif
-#ifdef RCHECK
-  	ASSERT(op->ov_rmagic == RMAGIC);
-	ASSERT(*(u_short *)((caddr_t)(op + 1) + op->ov_size) == RMAGIC);
-#endif
-  	size = op->ov_index;
-  	ASSERT(size < NBUCKETS);
-	op->ov_next = nextf[size];	/* also clobbers ov_magic */
-  	nextf[size] = op;
-#ifdef MSTATS
-  	nmalloc[size]--;
-#endif
-}
-
-/*
- * When a program attempts "storage compaction" as mentioned in the
- * old malloc man page, it realloc's an already freed block.  Usually
- * this is the last block it freed; occasionally it might be farther
- * back.  We have to search all the free lists for the block in order
- * to determine its bucket: 1st we make one pass thru the lists
- * checking only the first block in each; if that fails we search
- * ``realloc_srchlen'' blocks in each list for a match (the variable
- * is extern so the caller can modify it).  If that fails we just copy
- * however many bytes was given to realloc() and hope it's not huge.
- */
-int realloc_srchlen = 4;	/* 4 should be plenty, -1 =>'s whole list */
-
-void *
-realloc(cp, nbytes)
-	void *cp; 
-	size_t nbytes;
-{   
-  	register u_long onb;
-	register long i;
-	union overhead *op;
-  	char *res;
-	int was_alloced = 0;
-
-  	if (cp == NULL)
-  		return (malloc(nbytes));
-	if (nbytes == 0) {
-		free (cp);
-		return NULL;
-	}
-	op = (union overhead *)((caddr_t)cp - sizeof (union overhead));
-	if (op->ov_magic == MAGIC) {
-		was_alloced++;
-		i = op->ov_index;
-	} else {
-		/*
-		 * Already free, doing "compaction".
-		 *
-		 * Search for the old block of memory on the
-		 * free list.  First, check the most common
-		 * case (last element free'd), then (this failing)
-		 * the last ``realloc_srchlen'' items free'd.
-		 * If all lookups fail, then assume the size of
-		 * the memory block being realloc'd is the
-		 * largest possible (so that all "nbytes" of new
-		 * memory are copied into).  Note that this could cause
-		 * a memory fault if the old area was tiny, and the moon
-		 * is gibbous.  However, that is very unlikely.
-		 */
-		if ((i = findbucket(op, 1)) < 0 &&
-		    (i = findbucket(op, realloc_srchlen)) < 0)
-			i = NBUCKETS;
-	}
-	onb = 1 << (i + 3);
-	if (onb < pagesz)
-		onb -= sizeof (*op) + RSLOP;
-	else
-		onb += pagesz - sizeof (*op) - RSLOP;
-	/* avoid the copy if same size block */
-	if (was_alloced) {
-		if (i) {
-			i = 1 << (i + 2);
-			if (i < pagesz)
-				i -= sizeof (*op) + RSLOP;
-			else
-				i += pagesz - sizeof (*op) - RSLOP;
-		}
-		if (nbytes <= onb && nbytes > i) {
-#ifdef RCHECK
-			op->ov_size = (nbytes + RSLOP - 1) & ~(RSLOP - 1);
-			*(u_short *)((caddr_t)(op + 1) + op->ov_size) = RMAGIC;
-#endif
-			return(cp);
-		} else
-			free(cp);
-	}
-  	if ((res = malloc(nbytes)) == NULL)
-  		return (NULL);
-  	if (cp != res)		/* common optimization if "compacting" */
-		bcopy(cp, res, (nbytes < onb) ? nbytes : onb);
-  	return (res);
-}
-
-/*
- * Search ``srchlen'' elements of each free list for a block whose
- * header starts at ``freep''.  If srchlen is -1 search the whole list.
- * Return bucket number, or -1 if not found.
- */
-static int
-findbucket(freep, srchlen)
-	union overhead *freep;
-	int srchlen;
-{
-	register union overhead *p;
-	register int i, j;
-
-	for (i = 0; i < NBUCKETS; i++) {
-		j = 0;
-		for (p = nextf[i]; p && j != srchlen; p = p->ov_next) {
-			if (p == freep)
-				return (i);
-			j++;
-		}
-	}
-	return (-1);
-}
-
-#ifdef MSTATS
-/*
- * mstats - print out statistics about malloc
- * 
- * Prints two lines of numbers, one showing the length of the free list
- * for each size category, the second showing the number of mallocs -
- * frees for each size category.
- */
-void
-mstats(s)
-	char *s;
-{
-  	register int i, j;
-  	register union overhead *p;
-  	int totfree = 0,
-  	totused = 0;
-
-  	fprintf(stderr, "Memory allocation statistics %s\nfree:\t", s);
-  	for (i = 0; i < NBUCKETS; i++) {
-  		for (j = 0, p = nextf[i]; p; p = p->ov_next, j++)
-  			;
-  		fprintf(stderr, " %d", j);
-  		totfree += j * (1 << (i + 3));
-  	}
-  	fprintf(stderr, "\nused:\t");
-  	for (i = 0; i < NBUCKETS; i++) {
-  		fprintf(stderr, " %d", nmalloc[i]);
-  		totused += nmalloc[i] * (1 << (i + 3));
-  	}
-  	fprintf(stderr, "\n\tTotal in use: %d, total free: %d\n",
-	    totused, totfree);
-}
-#endif