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GNU LIBRARY GENERAL PUBLIC LICENSE
Version 2, June 1991
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That's all there is to it!

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Find older changes in OChangeLog.

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# Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
# 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., 675 Mass Ave,
# Cambridge, MA 02139, USA.
# Makefile for standalone distribution of malloc.
# Use this on System V.
#CPPFLAGS = -DUSG
.PHONY: all
all: libmalloc.a gmalloc.o
gmalloc = valloc.c malloc.c free.c cfree.c realloc.c calloc.c morecore.c memalign.c
sources = valloc.c malloc.c free.c cfree.c realloc.c calloc.c morecore.c memalign.c mcheck.c mtrace.c mstats.c vm-limit.c ralloc.c malloc-find.c
objects = valloc.o malloc.o free.o cfree.o realloc.o calloc.o morecore.o memalign.o mcheck.o mtrace.o mstats.o vm-limit.o ralloc.o malloc-find.o
headers = malloc.h
libmalloc.a: $(objects)
ar crv $@ $(objects)
ranlib $@
$(objects): $(headers)
gmalloc.c: gmalloc-head.c $(headers) $(gmalloc) Makefile
cat gmalloc-head.c $(headers) $(gmalloc) > $@-tmp
mv -f $@-tmp $@
# Make it unwritable to avoid accidentally changing the file,
# since it is generated and any changes would be lost.
chmod a-w $@
.c.o:
$(CC) $(CFLAGS) $(CPPFLAGS) -I. -c $< $(OUTPUT_OPTION)
.PHONY: clean realclean malloc-clean malloc-realclean
clean malloc-clean:
-rm -f libmalloc.a *.o core
realclean malloc-realclean: clean
-rm -f TAGS tags *~
# For inside the C library.
malloc.tar malloc.tar.Z: FORCE
$(MAKE) -C .. $@
FORCE:

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**** All newer entries are in the C library ChangeLog file. ****
Thu Jul 11 18:15:04 1991 Roland McGrath (roland@churchy.gnu.ai.mit.edu)
* Merged with C library version, which now has its own subdir.
* malloc.h, *.c: Use ansideclisms and #ifdefs for portability both
in and out of the C library.
* Makefile: New makefile for malloc subdir in libc.
Has targets to create malloc.tar{,.Z} by ansidecl processing on srcs.
* malloc/Makefile: New file; Makefile for standalone distribution.
* malloc/README: New file; info for same.
Fri Apr 6 00:18:36 1990 Jim Kingdon (kingdon at pogo.ai.mit.edu)
* Makefile: Add comments.
Thu Apr 5 23:08:14 1990 Mike Haertel (mike at albert.ai.mit.edu)
* mcheck.c (mcheck, checkhdr): Support user-supplied abort()
function.
* malloc.h: Declare __free().
* Makefile: New target libmalloc.a.
Thu Apr 5 21:56:03 1990 Jim Kingdon (kingdon at pogo.ai.mit.edu)
* free.c (free): Split into free and __free.
* malloc.c (morecore): Call __free on oldinfo.
Local Variables:
mode: indented-text
left-margin: 8
fill-column: 76
version-control: never
End:

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This is the standalone distribution of GNU malloc.
GNU malloc is part of the GNU C Library, but is also distributed separately.
If you find bugs in GNU malloc, send reports to bug-glibc@prep.ai.mit.edu.
GNU malloc is free software. See the file COPYING.LIB for copying conditions.
The makefile builds libmalloc.a and gmalloc.o. If you are using GNU malloc
to replace your system's existing malloc package, it is important to make
sure you get all GNU functions, not some of the GNU functions and some from
the system library. gmalloc.o has all the functions in one file, so using
that will make sure you don't accidentally mix the two malloc packages.

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/* $NetBSD: calloc.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Copyright (C) 1991, 1992, 1994 Free Software Foundation, Inc.
This 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.
This 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 this library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#endif
/* Allocate an array of NMEMB elements each SIZE bytes long.
The entire array is initialized to zeros. */
__ptr_t
calloc (nmemb, size)
register __malloc_size_t nmemb;
register __malloc_size_t size;
{
register __ptr_t result = malloc (nmemb * size);
if (result != NULL)
(void) memset (result, 0, nmemb * size);
return result;
}

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/* $NetBSD: cfree.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc.
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., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#endif
#ifdef _LIBC
#include <ansidecl.h>
#include <gnu-stabs.h>
#undef cfree
function_alias(cfree, free, void, (ptr),
DEFUN(cfree, (ptr), PTR ptr))
#else
void
cfree (ptr)
__ptr_t ptr;
{
free (ptr);
}
#endif

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/* $NetBSD: free.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Free a block of memory allocated by `malloc'.
Copyright 1990, 1991, 1992, 1994 Free Software Foundation, Inc.
Written May 1989 by Mike Haertel.
This 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.
This 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 this library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#endif
/* Debugging hook for free. */
void (*__free_hook) __P ((__ptr_t __ptr));
/* List of blocks allocated by memalign. */
struct alignlist *_aligned_blocks = NULL;
/* Return memory to the heap.
Like `free' but don't call a __free_hook if there is one. */
void
_free_internal (ptr)
__ptr_t ptr;
{
int type;
__malloc_size_t block, blocks;
register __malloc_size_t i;
struct list *prev, *next;
block = BLOCK (ptr);
type = _heapinfo[block].busy.type;
switch (type)
{
case 0:
/* Get as many statistics as early as we can. */
--_chunks_used;
_bytes_used -= _heapinfo[block].busy.info.size * BLOCKSIZE;
_bytes_free += _heapinfo[block].busy.info.size * BLOCKSIZE;
/* Find the free cluster previous to this one in the free list.
Start searching at the last block referenced; this may benefit
programs with locality of allocation. */
i = _heapindex;
if (i > block)
while (i > block)
i = _heapinfo[i].free.prev;
else
{
do
i = _heapinfo[i].free.next;
while (i > 0 && i < block);
i = _heapinfo[i].free.prev;
}
/* Determine how to link this block into the free list. */
if (block == i + _heapinfo[i].free.size)
{
/* Coalesce this block with its predecessor. */
_heapinfo[i].free.size += _heapinfo[block].busy.info.size;
block = i;
}
else
{
/* Really link this block back into the free list. */
_heapinfo[block].free.size = _heapinfo[block].busy.info.size;
_heapinfo[block].free.next = _heapinfo[i].free.next;
_heapinfo[block].free.prev = i;
_heapinfo[i].free.next = block;
_heapinfo[_heapinfo[block].free.next].free.prev = block;
++_chunks_free;
}
/* Now that the block is linked in, see if we can coalesce it
with its successor (by deleting its successor from the list
and adding in its size). */
if (block + _heapinfo[block].free.size == _heapinfo[block].free.next)
{
_heapinfo[block].free.size
+= _heapinfo[_heapinfo[block].free.next].free.size;
_heapinfo[block].free.next
= _heapinfo[_heapinfo[block].free.next].free.next;
_heapinfo[_heapinfo[block].free.next].free.prev = block;
--_chunks_free;
}
/* Now see if we can return stuff to the system. */
blocks = _heapinfo[block].free.size;
if (blocks >= FINAL_FREE_BLOCKS && block + blocks == _heaplimit
&& (*__morecore) (0) == ADDRESS (block + blocks))
{
register __malloc_size_t bytes = blocks * BLOCKSIZE;
_heaplimit -= blocks;
(*__morecore) (-bytes);
_heapinfo[_heapinfo[block].free.prev].free.next
= _heapinfo[block].free.next;
_heapinfo[_heapinfo[block].free.next].free.prev
= _heapinfo[block].free.prev;
block = _heapinfo[block].free.prev;
--_chunks_free;
_bytes_free -= bytes;
}
/* Set the next search to begin at this block. */
_heapindex = block;
break;
default:
/* Do some of the statistics. */
--_chunks_used;
_bytes_used -= 1 << type;
++_chunks_free;
_bytes_free += 1 << type;
/* Get the address of the first free fragment in this block. */
prev = (struct list *) ((char *) ADDRESS (block) +
(_heapinfo[block].busy.info.frag.first << type));
if (_heapinfo[block].busy.info.frag.nfree == (BLOCKSIZE >> type) - 1)
{
/* If all fragments of this block are free, remove them
from the fragment list and free the whole block. */
next = prev;
for (i = 1; i < (__malloc_size_t) (BLOCKSIZE >> type); ++i)
next = next->next;
prev->prev->next = next;
if (next != NULL)
next->prev = prev->prev;
_heapinfo[block].busy.type = 0;
_heapinfo[block].busy.info.size = 1;
/* Keep the statistics accurate. */
++_chunks_used;
_bytes_used += BLOCKSIZE;
_chunks_free -= BLOCKSIZE >> type;
_bytes_free -= BLOCKSIZE;
free (ADDRESS (block));
}
else if (_heapinfo[block].busy.info.frag.nfree != 0)
{
/* If some fragments of this block are free, link this
fragment into the fragment list after the first free
fragment of this block. */
next = (struct list *) ptr;
next->next = prev->next;
next->prev = prev;
prev->next = next;
if (next->next != NULL)
next->next->prev = next;
++_heapinfo[block].busy.info.frag.nfree;
}
else
{
/* No fragments of this block are free, so link this
fragment into the fragment list and announce that
it is the first free fragment of this block. */
prev = (struct list *) ptr;
_heapinfo[block].busy.info.frag.nfree = 1;
_heapinfo[block].busy.info.frag.first = (unsigned long int)
((unsigned long int) ((char *) ptr - (char *) NULL)
% BLOCKSIZE >> type);
prev->next = _fraghead[type].next;
prev->prev = &_fraghead[type];
prev->prev->next = prev;
if (prev->next != NULL)
prev->next->prev = prev;
}
break;
}
}
/* Return memory to the heap. */
void
free (ptr)
__ptr_t ptr;
{
register struct alignlist *l;
if (ptr == NULL)
return;
for (l = _aligned_blocks; l != NULL; l = l->next)
if (l->aligned == ptr)
{
l->aligned = NULL; /* Mark the slot in the list as free. */
ptr = l->exact;
break;
}
if (__free_hook != NULL)
(*__free_hook) (ptr);
else
_free_internal (ptr);
}

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/* $NetBSD: getpagesize.h,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Emulate getpagesize on systems that lack it. */
#ifndef HAVE_GETPAGESIZE
#ifdef VMS
#define getpagesize() 512
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef _SC_PAGESIZE
#define getpagesize() sysconf(_SC_PAGESIZE)
#else
#include <sys/param.h>
#ifdef EXEC_PAGESIZE
#define getpagesize() EXEC_PAGESIZE
#else
#ifdef NBPG
#define getpagesize() NBPG * CLSIZE
#ifndef CLSIZE
#define CLSIZE 1
#endif /* no CLSIZE */
#else /* no NBPG */
#ifdef NBPC
#define getpagesize() NBPC
#else /* no NBPC */
#ifdef PAGESIZE
#define getpagesize() PAGESIZE
#endif
#endif /* NBPC */
#endif /* no NBPG */
#endif /* no EXEC_PAGESIZE */
#endif /* no _SC_PAGESIZE */
#endif /* not HAVE_GETPAGESIZE */

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/* $NetBSD: gmalloc-head.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* DO NOT EDIT THIS FILE -- it is automagically generated. -*- C -*- */
#define _MALLOC_INTERNAL
/* The malloc headers and source files from the C library follow here. */

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/* $NetBSD: malloc-find.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Find the starting address of a malloc'd block, from anywhere inside it.
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library. Its master source is NOT part of
the C library, however. The master source lives in /gd/gnu/lib.
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., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#endif
/* Given an address in the middle of a malloc'd object,
return the address of the beginning of the object. */
__ptr_t
malloc_find_object_address (ptr)
__ptr_t ptr;
{
__malloc_size_t block = BLOCK (ptr);
int type = _heapinfo[block].busy.type;
if (type == 0)
{
/* The object is one or more entire blocks. */
__malloc_ptrdiff_t sizevalue = _heapinfo[block].busy.info.size;
if (sizevalue < 0)
/* This is one of the blocks after the first. SIZEVALUE
says how many blocks to go back to find the first. */
block += sizevalue;
/* BLOCK is now the first block of the object.
Its start is the start of the object. */
return ADDRESS (block);
}
else
{
/* Get the size of fragments in this block. */
__malloc_size_t size = 1 << type;
/* Turn off the low bits to find the start address of the fragment. */
return _heapbase + (((char *) ptr - _heapbase) & ~(size - 1));
}
}

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/* $NetBSD: malloc.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Memory allocator `malloc'.
Copyright 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
Written May 1989 by Mike Haertel.
This 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.
This 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 this library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#endif
/* How to really get more memory. */
__ptr_t (*__morecore) __P ((ptrdiff_t __size)) = __default_morecore;
/* Debugging hook for `malloc'. */
__ptr_t (*__malloc_hook) __P ((__malloc_size_t __size));
/* Pointer to the base of the first block. */
char *_heapbase;
/* Block information table. Allocated with align/__free (not malloc/free). */
malloc_info *_heapinfo;
/* Number of info entries. */
static __malloc_size_t heapsize;
/* Search index in the info table. */
__malloc_size_t _heapindex;
/* Limit of valid info table indices. */
__malloc_size_t _heaplimit;
/* Free lists for each fragment size. */
struct list _fraghead[BLOCKLOG];
/* Instrumentation. */
__malloc_size_t _chunks_used;
__malloc_size_t _bytes_used;
__malloc_size_t _chunks_free;
__malloc_size_t _bytes_free;
/* Are you experienced? */
int __malloc_initialized;
void (*__malloc_initialize_hook) __P ((void));
void (*__after_morecore_hook) __P ((void));
/* Aligned allocation. */
static __ptr_t align __P ((__malloc_size_t));
static __ptr_t
align (size)
__malloc_size_t size;
{
__ptr_t result;
unsigned long int adj;
result = (*__morecore) (size);
adj = (unsigned long int) ((unsigned long int) ((char *) result -
(char *) NULL)) % BLOCKSIZE;
if (adj != 0)
{
adj = BLOCKSIZE - adj;
(void) (*__morecore) (adj);
result = (char *) result + adj;
}
if (__after_morecore_hook)
(*__after_morecore_hook) ();
return result;
}
/* Set everything up and remember that we have. */
static int initialize __P ((void));
static int
initialize ()
{
if (__malloc_initialize_hook)
(*__malloc_initialize_hook) ();
heapsize = HEAP / BLOCKSIZE;
_heapinfo = (malloc_info *) align (heapsize * sizeof (malloc_info));
if (_heapinfo == NULL)
return 0;
memset (_heapinfo, 0, heapsize * sizeof (malloc_info));
_heapinfo[0].free.size = 0;
_heapinfo[0].free.next = _heapinfo[0].free.prev = 0;
_heapindex = 0;
_heapbase = (char *) _heapinfo;
/* Account for the _heapinfo block itself in the statistics. */
_bytes_used = heapsize * sizeof (malloc_info);
_chunks_used = 1;
__malloc_initialized = 1;
return 1;
}
/* Get neatly aligned memory, initializing or
growing the heap info table as necessary. */
static __ptr_t morecore __P ((__malloc_size_t));
static __ptr_t
morecore (size)
__malloc_size_t size;
{
__ptr_t result;
malloc_info *newinfo, *oldinfo;
__malloc_size_t newsize;
result = align (size);
if (result == NULL)
return NULL;
/* Check if we need to grow the info table. */
if ((__malloc_size_t) BLOCK ((char *) result + size) > heapsize)
{
newsize = heapsize;
while ((__malloc_size_t) BLOCK ((char *) result + size) > newsize)
newsize *= 2;
newinfo = (malloc_info *) align (newsize * sizeof (malloc_info));
if (newinfo == NULL)
{
(*__morecore) (-size);
return NULL;
}
memcpy (newinfo, _heapinfo, heapsize * sizeof (malloc_info));
memset (&newinfo[heapsize], 0,
(newsize - heapsize) * sizeof (malloc_info));
oldinfo = _heapinfo;
newinfo[BLOCK (oldinfo)].busy.type = 0;
newinfo[BLOCK (oldinfo)].busy.info.size
= BLOCKIFY (heapsize * sizeof (malloc_info));
_heapinfo = newinfo;
/* Account for the _heapinfo block itself in the statistics. */
_bytes_used += newsize * sizeof (malloc_info);
++_chunks_used;
_free_internal (oldinfo);
heapsize = newsize;
}
_heaplimit = BLOCK ((char *) result + size);
return result;
}
/* Allocate memory from the heap. */
__ptr_t
malloc (size)
__malloc_size_t size;
{
__ptr_t result;
__malloc_size_t block, blocks, lastblocks, start;
register __malloc_size_t i;
struct list *next;
/* ANSI C allows `malloc (0)' to either return NULL, or to return a
valid address you can realloc and free (though not dereference).
It turns out that some extant code (sunrpc, at least Ultrix's version)
expects `malloc (0)' to return non-NULL and breaks otherwise.
Be compatible. */
#if 0
if (size == 0)
return NULL;
#endif
if (__malloc_hook != NULL)
return (*__malloc_hook) (size);
if (!__malloc_initialized)
if (!initialize ())
return NULL;
if (size < sizeof (struct list))
size = sizeof (struct list);
#ifdef SUNOS_LOCALTIME_BUG
if (size < 16)
size = 16;
#endif
/* Determine the allocation policy based on the request size. */
if (size <= BLOCKSIZE / 2)
{
/* Small allocation to receive a fragment of a block.
Determine the logarithm to base two of the fragment size. */
register __malloc_size_t log = 1;
--size;
while ((size /= 2) != 0)
++log;
/* Look in the fragment lists for a
free fragment of the desired size. */
next = _fraghead[log].next;
if (next != NULL)
{
/* There are free fragments of this size.
Pop a fragment out of the fragment list and return it.
Update the block's nfree and first counters. */
result = (__ptr_t) next;
next->prev->next = next->next;
if (next->next != NULL)
next->next->prev = next->prev;
block = BLOCK (result);
if (--_heapinfo[block].busy.info.frag.nfree != 0)
_heapinfo[block].busy.info.frag.first = (unsigned long int)
((unsigned long int) ((char *) next->next - (char *) NULL)
% BLOCKSIZE) >> log;
/* Update the statistics. */
++_chunks_used;
_bytes_used += 1 << log;
--_chunks_free;
_bytes_free -= 1 << log;
}
else
{
/* No free fragments of the desired size, so get a new block
and break it into fragments, returning the first. */
result = malloc (BLOCKSIZE);
if (result == NULL)
return NULL;
/* Link all fragments but the first into the free list. */
for (i = 1; i < (__malloc_size_t) (BLOCKSIZE >> log); ++i)
{
next = (struct list *) ((char *) result + (i << log));
next->next = _fraghead[log].next;
next->prev = &_fraghead[log];
next->prev->next = next;
if (next->next != NULL)
next->next->prev = next;
}
/* Initialize the nfree and first counters for this block. */
block = BLOCK (result);
_heapinfo[block].busy.type = log;
_heapinfo[block].busy.info.frag.nfree = i - 1;
_heapinfo[block].busy.info.frag.first = i - 1;
_chunks_free += (BLOCKSIZE >> log) - 1;
_bytes_free += BLOCKSIZE - (1 << log);
_bytes_used -= BLOCKSIZE - (1 << log);
}
}
else
{
/* Large allocation to receive one or more blocks.
Search the free list in a circle starting at the last place visited.
If we loop completely around without finding a large enough
space we will have to get more memory from the system. */
blocks = BLOCKIFY (size);
start = block = _heapindex;
while (_heapinfo[block].free.size < blocks)
{
block = _heapinfo[block].free.next;
if (block == start)
{
/* Need to get more from the system. Check to see if
the new core will be contiguous with the final free
block; if so we don't need to get as much. */
block = _heapinfo[0].free.prev;
lastblocks = _heapinfo[block].free.size;
if (_heaplimit != 0 && block + lastblocks == _heaplimit &&
(*__morecore) (0) == ADDRESS (block + lastblocks) &&
(morecore ((blocks - lastblocks) * BLOCKSIZE)) != NULL)
{
/* Which block we are extending (the `final free
block' referred to above) might have changed, if
it got combined with a freed info table. */
block = _heapinfo[0].free.prev;
_heapinfo[block].free.size += (blocks - lastblocks);
_bytes_free += (blocks - lastblocks) * BLOCKSIZE;
continue;
}
result = morecore (blocks * BLOCKSIZE);
if (result == NULL)
return NULL;
block = BLOCK (result);
_heapinfo[block].busy.type = 0;
_heapinfo[block].busy.info.size = blocks;
++_chunks_used;
_bytes_used += blocks * BLOCKSIZE;
return result;
}
}
/* At this point we have found a suitable free list entry.
Figure out how to remove what we need from the list. */
result = ADDRESS (block);
if (_heapinfo[block].free.size > blocks)
{
/* The block we found has a bit left over,
so relink the tail end back into the free list. */
_heapinfo[block + blocks].free.size
= _heapinfo[block].free.size - blocks;
_heapinfo[block + blocks].free.next
= _heapinfo[block].free.next;
_heapinfo[block + blocks].free.prev
= _heapinfo[block].free.prev;
_heapinfo[_heapinfo[block].free.prev].free.next
= _heapinfo[_heapinfo[block].free.next].free.prev
= _heapindex = block + blocks;
}
else
{
/* The block exactly matches our requirements,
so just remove it from the list. */
_heapinfo[_heapinfo[block].free.next].free.prev
= _heapinfo[block].free.prev;
_heapinfo[_heapinfo[block].free.prev].free.next
= _heapindex = _heapinfo[block].free.next;
--_chunks_free;
}
_heapinfo[block].busy.type = 0;
_heapinfo[block].busy.info.size = blocks;
++_chunks_used;
_bytes_used += blocks * BLOCKSIZE;
_bytes_free -= blocks * BLOCKSIZE;
/* Mark all the blocks of the object just allocated except for the
first with a negative number so you can find the first block by
adding that adjustment. */
while (--blocks > 0)
_heapinfo[block + blocks].busy.info.size = -blocks;
}
return result;
}
#ifndef _LIBC
/* On some ANSI C systems, some libc functions call _malloc, _free
and _realloc. Make them use the GNU functions. */
__ptr_t
_malloc (size)
__malloc_size_t size;
{
return malloc (size);
}
void
_free (ptr)
__ptr_t ptr;
{
free (ptr);
}
__ptr_t
_realloc (ptr, size)
__ptr_t ptr;
__malloc_size_t size;
{
return realloc (ptr, size);
}
#endif

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/* $NetBSD: malloc.h,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Declarations for `malloc' and friends.
Copyright 1990, 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
Written May 1989 by Mike Haertel.
This 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.
This 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 this library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
#ifndef _MALLOC_H
#define _MALLOC_H 1
#ifdef _MALLOC_INTERNAL
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#if defined(_LIBC) || defined(STDC_HEADERS) || defined(USG)
#include <string.h>
#else
#ifndef memset
#define memset(s, zero, n) bzero ((s), (n))
#endif
#ifndef memcpy
#define memcpy(d, s, n) bcopy ((s), (d), (n))
#endif
#endif
#if defined (__GNU_LIBRARY__) || (defined (__STDC__) && __STDC__)
#include <limits.h>
#else
#ifndef CHAR_BIT
#define CHAR_BIT 8
#endif
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#endif /* _MALLOC_INTERNAL. */
#ifdef __cplusplus
extern "C"
{
#endif
#if defined (__cplusplus) || (defined (__STDC__) && __STDC__)
#undef __P
#define __P(args) args
#undef __ptr_t
#define __ptr_t void *
#else /* Not C++ or ANSI C. */
#undef __P
#define __P(args) ()
#undef const
#define const
#undef __ptr_t
#define __ptr_t char *
#endif /* C++ or ANSI C. */
#if defined (__STDC__) && __STDC__
#include <stddef.h>
#define __malloc_size_t size_t
#define __malloc_ptrdiff_t ptrdiff_t
#else
#define __malloc_size_t unsigned int
#define __malloc_ptrdiff_t int
#endif
#ifndef NULL
#define NULL 0
#endif
/* Allocate SIZE bytes of memory. */
extern __ptr_t malloc __P ((__malloc_size_t __size));
/* Re-allocate the previously allocated block
in __ptr_t, making the new block SIZE bytes long. */
extern __ptr_t realloc __P ((__ptr_t __ptr, __malloc_size_t __size));
/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
extern __ptr_t calloc __P ((__malloc_size_t __nmemb, __malloc_size_t __size));
/* Free a block allocated by `malloc', `realloc' or `calloc'. */
extern void free __P ((__ptr_t __ptr));
/* Allocate SIZE bytes allocated to ALIGNMENT bytes. */
extern __ptr_t memalign __P ((__malloc_size_t __alignment,
__malloc_size_t __size));
/* Allocate SIZE bytes on a page boundary. */
extern __ptr_t valloc __P ((__malloc_size_t __size));
#ifdef _MALLOC_INTERNAL
/* The allocator divides the heap into blocks of fixed size; large
requests receive one or more whole blocks, and small requests
receive a fragment of a block. Fragment sizes are powers of two,
and all fragments of a block are the same size. When all the
fragments in a block have been freed, the block itself is freed. */
#define INT_BIT (CHAR_BIT * sizeof(int))
#define BLOCKLOG (INT_BIT > 16 ? 12 : 9)
#define BLOCKSIZE (1 << BLOCKLOG)
#define BLOCKIFY(SIZE) (((SIZE) + BLOCKSIZE - 1) / BLOCKSIZE)
/* Determine the amount of memory spanned by the initial heap table
(not an absolute limit). */
#define HEAP (INT_BIT > 16 ? 4194304 : 65536)
/* Number of contiguous free blocks allowed to build up at the end of
memory before they will be returned to the system. */
#define FINAL_FREE_BLOCKS 8
/* Data structure giving per-block information. */
typedef union
{
/* Heap information for a busy block. */
struct
{
/* Zero for a large (multiblock) object, or positive giving the
logarithm to the base two of the fragment size. */
int type;
union
{
struct
{
__malloc_size_t nfree; /* Free frags in a fragmented block. */
__malloc_size_t first; /* First free fragment of the block. */
} frag;
/* For a large object, in its first block, this has the number
of blocks in the object. In the other blocks, this has a
negative number which says how far back the first block is. */
__malloc_ptrdiff_t size;
} info;
} busy;
/* Heap information for a free block
(that may be the first of a free cluster). */
struct
{
__malloc_size_t size; /* Size (in blocks) of a free cluster. */
__malloc_size_t next; /* Index of next free cluster. */
__malloc_size_t prev; /* Index of previous free cluster. */
} free;
} malloc_info;
/* Pointer to first block of the heap. */
extern char *_heapbase;
/* Table indexed by block number giving per-block information. */
extern malloc_info *_heapinfo;
/* Address to block number and vice versa. */
#define BLOCK(A) (((char *) (A) - _heapbase) / BLOCKSIZE + 1)
#define ADDRESS(B) ((__ptr_t) (((B) - 1) * BLOCKSIZE + _heapbase))
/* Current search index for the heap table. */
extern __malloc_size_t _heapindex;
/* Limit of valid info table indices. */
extern __malloc_size_t _heaplimit;
/* Doubly linked lists of free fragments. */
struct list
{
struct list *next;
struct list *prev;
};
/* Free list headers for each fragment size. */
extern struct list _fraghead[];
/* List of blocks allocated with `memalign' (or `valloc'). */
struct alignlist
{
struct alignlist *next;
__ptr_t aligned; /* The address that memaligned returned. */
__ptr_t exact; /* The address that malloc returned. */
};
extern struct alignlist *_aligned_blocks;
/* Instrumentation. */
extern __malloc_size_t _chunks_used;
extern __malloc_size_t _bytes_used;
extern __malloc_size_t _chunks_free;
extern __malloc_size_t _bytes_free;
/* Internal version of `free' used in `morecore' (malloc.c). */
extern void _free_internal __P ((__ptr_t __ptr));
#endif /* _MALLOC_INTERNAL. */
/* Given an address in the middle of a malloc'd object,
return the address of the beginning of the object. */
extern __ptr_t malloc_find_object_address __P ((__ptr_t __ptr));
/* Underlying allocation function; successive calls should
return contiguous pieces of memory. */
extern __ptr_t (*__morecore) __P ((__malloc_ptrdiff_t __size));
/* Default value of `__morecore'. */
extern __ptr_t __default_morecore __P ((__malloc_ptrdiff_t __size));
/* If not NULL, this function is called after each time
`__morecore' is called to increase the data size. */
extern void (*__after_morecore_hook) __P ((void));
/* Nonzero if `malloc' has been called and done its initialization. */
extern int __malloc_initialized;
/* Hooks for debugging versions. */
extern void (*__malloc_initialize_hook) __P ((void));
extern void (*__free_hook) __P ((__ptr_t __ptr));
extern __ptr_t (*__malloc_hook) __P ((__malloc_size_t __size));
extern __ptr_t (*__realloc_hook) __P ((__ptr_t __ptr, __malloc_size_t __size));
extern __ptr_t (*__memalign_hook) __P ((__malloc_size_t __size,
__malloc_size_t __alignment));
/* Return values for `mprobe': these are the kinds of inconsistencies that
`mcheck' enables detection of. */
enum mcheck_status
{
MCHECK_DISABLED = -1, /* Consistency checking is not turned on. */
MCHECK_OK, /* Block is fine. */
MCHECK_FREE, /* Block freed twice. */
MCHECK_HEAD, /* Memory before the block was clobbered. */
MCHECK_TAIL /* Memory after the block was clobbered. */
};
/* Activate a standard collection of debugging hooks. This must be called
before `malloc' is ever called. ABORTFUNC is called with an error code
(see enum above) when an inconsistency is detected. If ABORTFUNC is
null, the standard function prints on stderr and then calls `abort'. */
extern int mcheck __P ((void (*__abortfunc) __P ((enum mcheck_status))));
/* Check for aberrations in a particular malloc'd block. You must have
called `mcheck' already. These are the same checks that `mcheck' does
when you free or reallocate a block. */
extern enum mcheck_status mprobe __P ((__ptr_t __ptr));
/* Activate a standard collection of tracing hooks. */
extern void mtrace __P ((void));
extern void muntrace __P ((void));
/* Statistics available to the user. */
struct mstats
{
__malloc_size_t bytes_total; /* Total size of the heap. */
__malloc_size_t chunks_used; /* Chunks allocated by the user. */
__malloc_size_t bytes_used; /* Byte total of user-allocated chunks. */
__malloc_size_t chunks_free; /* Chunks in the free list. */
__malloc_size_t bytes_free; /* Byte total of chunks in the free list. */
};
/* Pick up the current statistics. */
extern struct mstats mstats __P ((void));
/* Call WARNFUN with a warning message when memory usage is high. */
extern void memory_warnings __P ((__ptr_t __start,
void (*__warnfun) __P ((const char *))));
/* Relocating allocator. */
/* Allocate SIZE bytes, and store the address in *HANDLEPTR. */
extern __ptr_t r_alloc __P ((__ptr_t *__handleptr, __malloc_size_t __size));
/* Free the storage allocated in HANDLEPTR. */
extern void r_alloc_free __P ((__ptr_t *__handleptr));
/* Adjust the block at HANDLEPTR to be SIZE bytes long. */
extern __ptr_t r_re_alloc __P ((__ptr_t *__handleptr, __malloc_size_t __size));
#ifdef __cplusplus
}
#endif
#endif /* malloc.h */

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/* $NetBSD: mcheck.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Standard debugging hooks for `malloc'.
Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
Written May 1989 by Mike Haertel.
This 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.
This 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 this library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#include <stdio.h>
#endif
/* Old hook values. */
static void (*old_free_hook) __P ((__ptr_t ptr));
static __ptr_t (*old_malloc_hook) __P ((__malloc_size_t size));
static __ptr_t (*old_realloc_hook) __P ((__ptr_t ptr, __malloc_size_t size));
/* Function to call when something awful happens. */
static void (*abortfunc) __P ((enum mcheck_status));
/* Arbitrary magical numbers. */
#define MAGICWORD 0xfedabeeb
#define MAGICFREE 0xd8675309
#define MAGICBYTE ((char) 0xd7)
#define MALLOCFLOOD ((char) 0x93)
#define FREEFLOOD ((char) 0x95)
struct hdr
{
__malloc_size_t size; /* Exact size requested by user. */
unsigned long int magic; /* Magic number to check header integrity. */
};
#if defined(_LIBC) || defined(STDC_HEADERS) || defined(USG)
#define flood memset
#else
static void flood __P ((__ptr_t, int, __malloc_size_t));
static void
flood (ptr, val, size)
__ptr_t ptr;
int val;
__malloc_size_t size;
{
char *cp = ptr;
while (size--)
*cp++ = val;
}
#endif
static enum mcheck_status checkhdr __P ((const struct hdr *));
static enum mcheck_status
checkhdr (hdr)
const struct hdr *hdr;
{
enum mcheck_status status;
switch (hdr->magic)
{
default:
status = MCHECK_HEAD;
break;
case MAGICFREE:
status = MCHECK_FREE;
break;
case MAGICWORD:
if (((char *) &hdr[1])[hdr->size] != MAGICBYTE)
status = MCHECK_TAIL;
else
status = MCHECK_OK;
break;
}
if (status != MCHECK_OK)
(*abortfunc) (status);
return status;
}
static void freehook __P ((__ptr_t));
static void
freehook (ptr)
__ptr_t ptr;
{
struct hdr *hdr = ((struct hdr *) ptr) - 1;
checkhdr (hdr);
hdr->magic = MAGICFREE;
flood (ptr, FREEFLOOD, hdr->size);
__free_hook = old_free_hook;
free (hdr);
__free_hook = freehook;
}
static __ptr_t mallochook __P ((__malloc_size_t));
static __ptr_t
mallochook (size)
__malloc_size_t size;
{
struct hdr *hdr;
__malloc_hook = old_malloc_hook;
hdr = (struct hdr *) malloc (sizeof (struct hdr) + size + 1);
__malloc_hook = mallochook;
if (hdr == NULL)
return NULL;
hdr->size = size;
hdr->magic = MAGICWORD;
((char *) &hdr[1])[size] = MAGICBYTE;
flood ((__ptr_t) (hdr + 1), MALLOCFLOOD, size);
return (__ptr_t) (hdr + 1);
}
static __ptr_t reallochook __P ((__ptr_t, __malloc_size_t));
static __ptr_t
reallochook (ptr, size)
__ptr_t ptr;
__malloc_size_t size;
{
struct hdr *hdr = ((struct hdr *) ptr) - 1;
__malloc_size_t osize = hdr->size;
checkhdr (hdr);
if (size < osize)
flood ((char *) ptr + size, FREEFLOOD, osize - size);
__free_hook = old_free_hook;
__malloc_hook = old_malloc_hook;
__realloc_hook = old_realloc_hook;
hdr = (struct hdr *) realloc ((__ptr_t) hdr, sizeof (struct hdr) + size + 1);
__free_hook = freehook;
__malloc_hook = mallochook;
__realloc_hook = reallochook;
if (hdr == NULL)
return NULL;
hdr->size = size;
hdr->magic = MAGICWORD;
((char *) &hdr[1])[size] = MAGICBYTE;
if (size > osize)
flood ((char *) (hdr + 1) + osize, MALLOCFLOOD, size - osize);
return (__ptr_t) (hdr + 1);
}
static void
mabort (status)
enum mcheck_status status;
{
const char *msg;
switch (status)
{
case MCHECK_OK:
msg = "memory is consistent, library is buggy";
break;
case MCHECK_HEAD:
msg = "memory clobbered before allocated block";
break;
case MCHECK_TAIL:
msg = "memory clobbered past end of allocated block";
break;
case MCHECK_FREE:
msg = "block freed twice";
break;
default:
msg = "bogus mcheck_status, library is buggy";
break;
}
#ifdef __GNU_LIBRARY__
__libc_fatal (msg);
#else
fprintf (stderr, "mcheck: %s\n", msg);
fflush (stderr);
abort ();
#endif
}
static int mcheck_used = 0;
int
mcheck (func)
void (*func) __P ((enum mcheck_status));
{
abortfunc = (func != NULL) ? func : &mabort;
/* These hooks may not be safely inserted if malloc is already in use. */
if (!__malloc_initialized && !mcheck_used)
{
old_free_hook = __free_hook;
__free_hook = freehook;
old_malloc_hook = __malloc_hook;
__malloc_hook = mallochook;
old_realloc_hook = __realloc_hook;
__realloc_hook = reallochook;
mcheck_used = 1;
}
return mcheck_used ? 0 : -1;
}
enum mcheck_status
mprobe (__ptr_t ptr)
{
return mcheck_used ? checkhdr (ptr) : MCHECK_DISABLED;
}

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/* $NetBSD: mem-limits.h,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Includes for memory limit warnings.
Copyright (C) 1990, 1993, 1994 Free Software Foundation, Inc.
This file is part of the GNU C Library. Its master source is NOT part of
the C library, however. The master source lives in /gd/gnu/lib.
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., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#ifdef MSDOS
#include <dpmi.h>
#endif
/* Some systems need this before <sys/resource.h>. */
#include <sys/types.h>
#ifdef _LIBC
#include <sys/resource.h>
#define BSD4_2 /* Tell code below to use getrlimit. */
#else
#if defined (__osf__) && (defined (__mips) || defined (mips) || defined(__alpha))
#include <sys/time.h>
#include <sys/resource.h>
#endif
#ifdef __bsdi__
#define BSD4_2
#endif
#ifndef BSD4_2
#ifndef USG
#ifndef MSDOS
#ifndef WINDOWSNT
#include <sys/vlimit.h>
#endif /* not WINDOWSNT */
#endif /* not MSDOS */
#endif /* not USG */
#else /* if BSD4_2 */
#include <sys/time.h>
#include <sys/resource.h>
#endif /* BSD4_2 */
#endif /* _LIBC */
#ifdef emacs
/* The important properties of this type are that 1) it's a pointer, and
2) arithmetic on it should work as if the size of the object pointed
to has a size of 1. */
#ifdef __STDC__
typedef void *POINTER;
#else
typedef char *POINTER;
#endif
typedef unsigned long SIZE;
#ifdef NULL
#undef NULL
#endif
#define NULL ((POINTER) 0)
extern POINTER start_of_data ();
#ifdef DATA_SEG_BITS
#define EXCEEDS_LISP_PTR(ptr) \
(((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS)
#else
#define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS)
#endif
#ifdef BSD
#ifndef DATA_SEG_BITS
extern char etext;
#define start_of_data() &etext
#endif
#endif
#else /* Not emacs */
extern char etext;
#define start_of_data() &etext
#endif /* Not emacs */
/* start of data space; can be changed by calling malloc_init */
static POINTER data_space_start;
/* Number of bytes of writable memory we can expect to be able to get */
static unsigned int lim_data;
#ifdef NO_LIM_DATA
static void
get_lim_data ()
{
lim_data = -1;
}
#else /* not NO_LIM_DATA */
#ifdef USG
static void
get_lim_data ()
{
extern long ulimit ();
lim_data = -1;
/* Use the ulimit call, if we seem to have it. */
#if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX)
lim_data = ulimit (3, 0);
#endif
/* If that didn't work, just use the macro's value. */
#ifdef ULIMIT_BREAK_VALUE
if (lim_data == -1)
lim_data = ULIMIT_BREAK_VALUE;
#endif
lim_data -= (long) data_space_start;
}
#else /* not USG */
#ifdef WINDOWSNT
static void
get_lim_data ()
{
extern unsigned long data_region_size;
lim_data = data_region_size;
}
#else
#if !defined (BSD4_2) && !defined (__osf__)
#ifdef MSDOS
void
get_lim_data ()
{
_go32_dpmi_meminfo info;
_go32_dpmi_get_free_memory_information (&info);
lim_data = info.available_memory;
}
#else /* not MSDOS */
static void
get_lim_data ()
{
lim_data = vlimit (LIM_DATA, -1);
}
#endif /* not MSDOS */
#else /* BSD4_2 */
static void
get_lim_data ()
{
struct rlimit XXrlimit;
getrlimit (RLIMIT_DATA, &XXrlimit);
#ifdef RLIM_INFINITY
lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */
#else
lim_data = XXrlimit.rlim_cur; /* soft limit */
#endif
}
#endif /* BSD4_2 */
#endif /* not WINDOWSNT */
#endif /* not USG */
#endif /* not NO_LIM_DATA */

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external/gpl2/libmalloc/dist/memalign.c vendored Normal file
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/* $NetBSD: memalign.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
This 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.
This 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 this library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#endif
__ptr_t (*__memalign_hook) __P ((size_t __size, size_t __alignment));
__ptr_t
memalign (alignment, size)
__malloc_size_t alignment;
__malloc_size_t size;
{
__ptr_t result;
unsigned long int adj;
if (__memalign_hook)
return (*__memalign_hook) (alignment, size);
size = ((size + alignment - 1) / alignment) * alignment;
result = malloc (size);
if (result == NULL)
return NULL;
adj = (unsigned long int) ((unsigned long int) ((char *) result -
(char *) NULL)) % alignment;
if (adj != 0)
{
struct alignlist *l;
for (l = _aligned_blocks; l != NULL; l = l->next)
if (l->aligned == NULL)
/* This slot is free. Use it. */
break;
if (l == NULL)
{
l = (struct alignlist *) malloc (sizeof (struct alignlist));
if (l == NULL)
{
free (result);
return NULL;
}
l->next = _aligned_blocks;
_aligned_blocks = l;
}
l->exact = result;
result = l->aligned = (char *) result + alignment - adj;
}
return result;
}

54
external/gpl2/libmalloc/dist/morecore.c vendored Normal file
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/* $NetBSD: morecore.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
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 General Public License as published by
the Free Software Foundation; either version 2, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with the GNU C Library; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#endif
#ifndef __GNU_LIBRARY__
#define __sbrk sbrk
#endif
#ifdef __GNU_LIBRARY__
/* It is best not to declare this and cast its result on foreign operating
systems with potentially hostile include files. */
extern __ptr_t __sbrk __P ((int increment));
#endif
#ifndef NULL
#define NULL 0
#endif
/* Allocate INCREMENT more bytes of data space,
and return the start of data space, or NULL on errors.
If INCREMENT is negative, shrink data space. */
__ptr_t
__default_morecore (increment)
#ifdef __STDC__
ptrdiff_t increment;
#else
int increment;
#endif
{
__ptr_t result = (__ptr_t) __sbrk ((int) increment);
if (result == (__ptr_t) -1)
return NULL;
return result;
}

41
external/gpl2/libmalloc/dist/mstats.c vendored Normal file
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/* $NetBSD: mstats.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Access the statistics maintained by `malloc'.
Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
Written May 1989 by Mike Haertel.
This 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.
This 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 this library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#endif
struct mstats
mstats ()
{
struct mstats result;
result.bytes_total = (char *) (*__morecore) (0) - _heapbase;
result.chunks_used = _chunks_used;
result.bytes_used = _bytes_used;
result.chunks_free = _chunks_free;
result.bytes_free = _bytes_free;
return result;
}

50
external/gpl2/libmalloc/dist/mtrace.awk vendored Normal file
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#
# Awk program to analyze mtrace.c output.
#
{
if ($1 == "@") {
where = " (" $2 ")"
n = 3
} else {
where = ""
n = 1
}
if ($n == "+") {
if (allocated[$(n+1)] != "")
print "+", $(n+1), "Alloc", NR, "duplicate:", allocated[$(n+1)], wherewas[$(n+1)], where;
else {
wherewas[$(n+1)] = where;
allocated[$(n+1)] = $(n+2);
}
} else if ($n == "-") {
if (allocated[$(n+1)] != "") {
wherewas[$(n+1)] = "";
allocated[$(n+1)] = "";
if (allocated[$(n+1)] != "")
print "DELETE FAILED", $(n+1), allocated[$(n+1)];
} else
print "-", $(n+1), "Free", NR, "was never alloc'd", where;
} else if ($n == "<") {
if (allocated[$(n+1)] != "") {
wherewas[$(n+1)] = "";
allocated[$(n+1)] = "";
} else
print "-", $(n+1), "Realloc", NR, "was never alloc'd", where;
} else if ($n == ">") {
if (allocated[$(n+1)] != "")
print "+", $(n+1), "Realloc", NR, "duplicate:", allocated[$(n+1)], where;
else {
wherewas[$(n+1)] = $(n+2);
allocated[$(n+1)] = $(n+2);
}
} else if ($n == "=") {
# Ignore "= Start"
} else if ($n == "!") {
# Ignore failed realloc attempts for now
}
}
END {
for (x in allocated)
if (allocated[x] != "")
print "+", x, allocated[x], wherewas[x];
}

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/* $NetBSD: mtrace.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* More debugging hooks for `malloc'.
Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
Written April 2, 1991 by John Gilmore of Cygnus Support.
Based on mcheck.c by Mike Haertel.
This 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.
This 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 this library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#endif
#include <stdio.h>
#ifndef __GNU_LIBRARY__
extern char *getenv ();
#else
#include <stdlib.h>
#endif
static FILE *mallstream;
static char mallenv[]= "MALLOC_TRACE";
static char mallbuf[BUFSIZ]; /* Buffer for the output. */
/* Address to breakpoint on accesses to... */
__ptr_t mallwatch;
/* File name and line number information, for callers that had
the foresight to call through a macro. */
char *_mtrace_file;
int _mtrace_line;
/* Old hook values. */
static void (*tr_old_free_hook) __P ((__ptr_t ptr));
static __ptr_t (*tr_old_malloc_hook) __P ((__malloc_size_t size));
static __ptr_t (*tr_old_realloc_hook) __P ((__ptr_t ptr, __malloc_size_t size));
/* 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. */
void tr_break __P ((void));
void
tr_break ()
{
}
static void tr_where __P ((void));
static void
tr_where ()
{
if (_mtrace_file)
{
fprintf (mallstream, "@ %s:%d ", _mtrace_file, _mtrace_line);
_mtrace_file = NULL;
}
}
static void tr_freehook __P ((__ptr_t));
static void
tr_freehook (ptr)
__ptr_t ptr;
{
tr_where ();
fprintf (mallstream, "- %p\n", ptr); /* Be sure to print it first. */
if (ptr == mallwatch)
tr_break ();
__free_hook = tr_old_free_hook;
free (ptr);
__free_hook = tr_freehook;
}
static __ptr_t tr_mallochook __P ((__malloc_size_t));
static __ptr_t
tr_mallochook (size)
__malloc_size_t size;
{
__ptr_t hdr;
__malloc_hook = tr_old_malloc_hook;
hdr = (__ptr_t) malloc (size);
__malloc_hook = tr_mallochook;
tr_where ();
/* We could be printing a NULL here; that's OK. */
fprintf (mallstream, "+ %p %lx\n", hdr, (unsigned long)size);
if (hdr == mallwatch)
tr_break ();
return hdr;
}
static __ptr_t tr_reallochook __P ((__ptr_t, __malloc_size_t));
static __ptr_t
tr_reallochook (ptr, size)
__ptr_t ptr;
__malloc_size_t size;
{
__ptr_t hdr;
if (ptr == mallwatch)
tr_break ();
__free_hook = tr_old_free_hook;
__malloc_hook = tr_old_malloc_hook;
__realloc_hook = tr_old_realloc_hook;
hdr = (__ptr_t) realloc (ptr, size);
__free_hook = tr_freehook;
__malloc_hook = tr_mallochook;
__realloc_hook = tr_reallochook;
tr_where ();
if (hdr == NULL)
/* Failed realloc. */
fprintf (mallstream, "! %p %lx\n", ptr, (unsigned long)size);
else
fprintf (mallstream, "< %p\n> %p %lx\n", ptr, hdr, (unsigned long)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! */
void
mtrace ()
{
char *mallfile;
/* Don't panic if we're called more than once. */
if (mallstream != NULL)
return;
mallfile = getenv (mallenv);
if (mallfile != NULL || mallwatch != NULL)
{
mallstream = fopen (mallfile != NULL ? mallfile : "/dev/null", "w");
if (mallstream != NULL)
{
/* Be sure it doesn't malloc its buffer! */
setbuf (mallstream, mallbuf);
fprintf (mallstream, "= Start\n");
tr_old_free_hook = __free_hook;
__free_hook = tr_freehook;
tr_old_malloc_hook = __malloc_hook;
__malloc_hook = tr_mallochook;
tr_old_realloc_hook = __realloc_hook;
__realloc_hook = tr_reallochook;
}
}
}
void
muntrace ()
{
if (mallstream == NULL)
return;
fprintf (mallstream, "= End\n");
fclose (mallstream);
mallstream = NULL;
__free_hook = tr_old_free_hook;
__malloc_hook = tr_old_malloc_hook;
__realloc_hook = tr_old_realloc_hook;
}

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external/gpl2/libmalloc/dist/ralloc.c vendored Normal file
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221
external/gpl2/libmalloc/dist/realloc.c vendored Normal file
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/* $NetBSD: realloc.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Change the size of a block allocated by `malloc'.
Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
Written May 1989 by Mike Haertel.
This 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.
This 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 this library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#endif
#if (defined (MEMMOVE_MISSING) || \
!defined(_LIBC) && !defined(STDC_HEADERS) && !defined(USG))
/* Snarfed directly from Emacs src/dispnew.c:
XXX Should use system bcopy if it handles overlap. */
#ifndef emacs
/* Like bcopy except never gets confused by overlap. */
static void
safe_bcopy (from, to, size)
char *from, *to;
int size;
{
if (size <= 0 || from == to)
return;
/* If the source and destination don't overlap, then bcopy can
handle it. If they do overlap, but the destination is lower in
memory than the source, we'll assume bcopy can handle that. */
if (to < from || from + size <= to)
bcopy (from, to, size);
/* Otherwise, we'll copy from the end. */
else
{
register char *endf = from + size;
register char *endt = to + size;
/* If TO - FROM is large, then we should break the copy into
nonoverlapping chunks of TO - FROM bytes each. However, if
TO - FROM is small, then the bcopy function call overhead
makes this not worth it. The crossover point could be about
anywhere. Since I don't think the obvious copy loop is too
bad, I'm trying to err in its favor. */
if (to - from < 64)
{
do
*--endt = *--endf;
while (endf != from);
}
else
{
for (;;)
{
endt -= (to - from);
endf -= (to - from);
if (endt < to)
break;
bcopy (endf, endt, to - from);
}
/* If SIZE wasn't a multiple of TO - FROM, there will be a
little left over. The amount left over is
(endt + (to - from)) - to, which is endt - from. */
bcopy (from, to, endt - from);
}
}
}
#endif /* Not emacs. */
#define memmove(to, from, size) safe_bcopy ((from), (to), (size))
#endif
#define min(A, B) ((A) < (B) ? (A) : (B))
/* Debugging hook for realloc. */
__ptr_t (*__realloc_hook) __P ((__ptr_t __ptr, __malloc_size_t __size));
/* Resize the given region to the new size, returning a pointer
to the (possibly moved) region. This is optimized for speed;
some benchmarks seem to indicate that greater compactness is
achieved by unconditionally allocating and copying to a
new region. This module has incestuous knowledge of the
internals of both free and malloc. */
__ptr_t
realloc (ptr, size)
__ptr_t ptr;
__malloc_size_t size;
{
__ptr_t result;
int type;
__malloc_size_t block, blocks, oldlimit;
if (size == 0)
{
free (ptr);
return malloc (0);
}
else if (ptr == NULL)
return malloc (size);
if (__realloc_hook != NULL)
return (*__realloc_hook) (ptr, size);
block = BLOCK (ptr);
type = _heapinfo[block].busy.type;
switch (type)
{
case 0:
/* Maybe reallocate a large block to a small fragment. */
if (size <= BLOCKSIZE / 2)
{
result = malloc (size);
if (result != NULL)
{
memcpy (result, ptr, size);
_free_internal (ptr);
return result;
}
}
/* The new size is a large allocation as well;
see if we can hold it in place. */
blocks = BLOCKIFY (size);
if (blocks < _heapinfo[block].busy.info.size)
{
/* The new size is smaller; return
excess memory to the free list. */
_heapinfo[block + blocks].busy.type = 0;
_heapinfo[block + blocks].busy.info.size
= _heapinfo[block].busy.info.size - blocks;
_heapinfo[block].busy.info.size = blocks;
/* We have just created a new chunk by splitting a chunk in two.
Now we will free this chunk; increment the statistics counter
so it doesn't become wrong when _free_internal decrements it. */
++_chunks_used;
_free_internal (ADDRESS (block + blocks));
result = ptr;
}
else if (blocks == _heapinfo[block].busy.info.size)
/* No size change necessary. */
result = ptr;
else
{
/* Won't fit, so allocate a new region that will.
Free the old region first in case there is sufficient
adjacent free space to grow without moving. */
blocks = _heapinfo[block].busy.info.size;
/* Prevent free from actually returning memory to the system. */
oldlimit = _heaplimit;
_heaplimit = 0;
_free_internal (ptr);
_heaplimit = oldlimit;
result = malloc (size);
if (result == NULL)
{
/* Now we're really in trouble. We have to unfree
the thing we just freed. Unfortunately it might
have been coalesced with its neighbors. */
if (_heapindex == block)
(void) malloc (blocks * BLOCKSIZE);
else
{
__ptr_t previous = malloc ((block - _heapindex) * BLOCKSIZE);
(void) malloc (blocks * BLOCKSIZE);
_free_internal (previous);
}
return NULL;
}
if (ptr != result)
memmove (result, ptr, blocks * BLOCKSIZE);
}
break;
default:
/* Old size is a fragment; type is logarithm
to base two of the fragment size. */
if (size > (__malloc_size_t) (1 << (type - 1)) &&
size <= (__malloc_size_t) (1 << type))
/* The new size is the same kind of fragment. */
result = ptr;
else
{
/* The new size is different; allocate a new space,
and copy the lesser of the new size and the old. */
result = malloc (size);
if (result == NULL)
return NULL;
memcpy (result, ptr, min (size, (__malloc_size_t) 1 << type));
free (ptr);
}
break;
}
return result;
}

48
external/gpl2/libmalloc/dist/valloc.c vendored Normal file
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/* $NetBSD: valloc.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Allocate memory on a page boundary.
Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
This 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.
This 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 this library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
#if defined (__GNU_LIBRARY__) || defined (_LIBC)
#include <stddef.h>
#include <sys/cdefs.h>
extern size_t __getpagesize __P ((void));
#else
#include "getpagesize.h"
#define __getpagesize() getpagesize()
#endif
#ifndef _MALLOC_INTERNAL
#define _MALLOC_INTERNAL
#include <malloc.h>
#endif
static __malloc_size_t pagesize;
__ptr_t
valloc (size)
__malloc_size_t size;
{
if (pagesize == 0)
pagesize = __getpagesize ();
return memalign (pagesize, size);
}

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/* $NetBSD: vm-limit.c,v 1.1.1.1 2016/01/13 21:42:18 christos Exp $ */
/* Functions for memory limit warnings.
Copyright (C) 1990, 1992 Free Software Foundation, Inc.
This file is part of the GNU C Library. Its master source is NOT part of
the C library, however. The master source lives in /gd/gnu/lib.
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., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#ifdef emacs
#include <config.h>
#include "lisp.h"
#endif
#ifndef emacs
#include <stddef.h>
typedef size_t SIZE;
typedef void *POINTER;
#define EXCEEDS_LISP_PTR(x) 0
#endif
#include "mem-limits.h"
/*
Level number of warnings already issued.
0 -- no warnings issued.
1 -- 75% warning already issued.
2 -- 85% warning already issued.
3 -- 95% warning issued; keep warning frequently.
*/
static int warnlevel;
/* Function to call to issue a warning;
0 means don't issue them. */
static void (*warn_function) ();
/* Get more memory space, complaining if we're near the end. */
static void
check_memory_limits ()
{
extern POINTER (*__morecore) ();
register POINTER cp;
unsigned long five_percent;
unsigned long data_size;
if (lim_data == 0)
get_lim_data ();
five_percent = lim_data / 20;
/* Find current end of memory and issue warning if getting near max */
cp = (char *) (*__morecore) (0);
data_size = (char *) cp - (char *) data_space_start;
if (warn_function)
switch (warnlevel)
{
case 0:
if (data_size > five_percent * 15)
{
warnlevel++;
(*warn_function) ("Warning: past 75% of memory limit");
}
break;
case 1:
if (data_size > five_percent * 17)
{
warnlevel++;
(*warn_function) ("Warning: past 85% of memory limit");
}
break;
case 2:
if (data_size > five_percent * 19)
{
warnlevel++;
(*warn_function) ("Warning: past 95% of memory limit");
}
break;
default:
(*warn_function) ("Warning: past acceptable memory limits");
break;
}
/* If we go down below 70% full, issue another 75% warning
when we go up again. */
if (data_size < five_percent * 14)
warnlevel = 0;
/* If we go down below 80% full, issue another 85% warning
when we go up again. */
else if (warnlevel > 1 && data_size < five_percent * 16)
warnlevel = 1;
/* If we go down below 90% full, issue another 95% warning
when we go up again. */
else if (warnlevel > 2 && data_size < five_percent * 18)
warnlevel = 2;
if (EXCEEDS_LISP_PTR (cp))
(*warn_function) ("Warning: memory in use exceeds lisp pointer size");
}
/* Cause reinitialization based on job parameters;
also declare where the end of pure storage is. */
void
memory_warnings (start, warnfun)
POINTER start;
void (*warnfun) ();
{
extern void (* __after_morecore_hook) (); /* From gmalloc.c */
if (start)
data_space_start = start;
else
data_space_start = start_of_data ();
warn_function = warnfun;
__after_morecore_hook = check_memory_limits;
}