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New memory malloc malloc library, based on GNU malloc.
1992-03-15 02:16:01 +00:00
#--------CUT---------CUT---------CUT---------CUT--------#
#########################################################
# #
# This is a shell archive file. To extract files: #
# #
# 1) Make a directory for the files. #
# 2) Write a file, such as "file.shar", containing #
# this archive file into the directory. #
# 3) Type "sh file.shar". Do not use csh. #
# #
#########################################################
#
#
echo Extracting ChangeLog:
sed 's/^Z//' >ChangeLog <<\STUNKYFLUFF
ZThu Jul 11 18:15:04 1991 Roland McGrath (roland@churchy.gnu.ai.mit.edu)
Z
Z * Merged with C library version, which now has its own subdir.
Z * malloc.h, *.c: Use ansideclisms and #ifdefs for portability both
Z in and out of the C library.
Z * Makefile: New makefile for malloc subdir in libc.
Z Has targets to create malloc.tar{,.Z} by ansidecl processing on srcs.
Z * malloc/Makefile: New file; Makefile for standalone distribution.
Z * malloc/README: New file; info for same.
Z
ZFri Apr 6 00:18:36 1990 Jim Kingdon (kingdon at pogo.ai.mit.edu)
Z
Z * Makefile: Add comments.
Z
ZThu Apr 5 23:08:14 1990 Mike Haertel (mike at albert.ai.mit.edu)
Z
Z * mcheck.c (mcheck, checkhdr): Support user-supplied abort()
Z function.
Z * malloc.h: Declare __free().
Z * Makefile: New target libmalloc.a.
Z
ZThu Apr 5 21:56:03 1990 Jim Kingdon (kingdon at pogo.ai.mit.edu)
Z
Z * free.c (free): Split into free and __free.
Z * malloc.c (morecore): Call __free on oldinfo.
Z
ZLocal Variables:
Zmode: indented-text
Zleft-margin: 8
Zfill-column: 76
Zversion-control: never
ZEnd:
STUNKYFLUFF
set `sum ChangeLog`
if test 21008 != $1
then
echo ChangeLog: Checksum error. Is: $1, should be: 21008.
fi
#
#
echo Extracting Makefile:
sed 's/^Z//' >Makefile <<\STUNKYFLUFF
Z# Copyright (C) 1991, 1992 Free Software Foundation, Inc.
Z# This file is part of the GNU C Library.
Z
Z# The GNU C Library is free software; you can redistribute it and/or
Z# modify it under the terms of the GNU Library General Public License as
Z# published by the Free Software Foundation; either version 2 of the
Z# License, or (at your option) any later version.
Z
Z# The GNU C Library is distributed in the hope that it will be useful,
Z# but WITHOUT ANY WARRANTY; without even the implied warranty of
Z# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Z# Library General Public License for more details.
Z
Z# You should have received a copy of the GNU Library General Public
Z# License along with the GNU C Library; see the file COPYING.LIB. If
Z# not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Z# Cambridge, MA 02139, USA.
Z
Z#
Z# Makefile for malloc routines
Z#
Zsubdir := malloc
Z
Zall:
Z
Zheaders := malloc.h
Z
Zroutines := malloc free cfree realloc calloc morecore \
Z valloc memalign mcheck mtrace mstats
Znodist := cfree
Z
Zinstall-lib := libmcheck.a
Z
Zdistribute := mcheck-init.c ChangeLog TODO \
Z malloc/gmalloc-head.c dist-README dist-Makefile \
Z mtrace.awk
Z
Z
Zinclude ../Rules
Z
Z$(objpfx)libmcheck.a: $(objpfx)mcheck-init.o
Z ln $< $@
Z
Z# Make the standalone malloc distribution.
Zdist-routines := $(filter-out $(nodist),$(routines))
Zmalloc-dist := README COPYING.LIB Makefile ChangeLog \
Z $(addsuffix .c,$(dist-routines)) $(headers) gmalloc.c \
Z gmalloc-head.c mtrace.awk
Z%.uu: %
Z uuencode $< < $< > $@-tmp
Z mv $@-tmp $@
Z%.Z: %
Z compress -c $< > $@-tmp
Z mv $@-tmp $@
Zmalloc.tar: $(addprefix malloc/,$(malloc-dist))
Z tar ch$(verbose)f $@ $^
Zmalloc/%.c: %.c malloc/
Z $(..)ansidecl -trad $< | indent -stdin -gnu > $@-tmp
Z mv $@-tmp $@
Zmalloc/%.h: %.h malloc/
Z $(..)ansidecl -trad $< | indent -stdin -gnu > $@-tmp
Z mv $@-tmp $@
Zmalloc/Makefile: dist-Makefile
Z sed -e 's,<DIST-SOURCES>,$(addsuffix .c,$(dist-routines)),' \
Z -e 's,<DIST-OBJECTS>,$(addsuffix .o,$(dist-routines)),' \
Z -e 's,<DIST-HEADERS>,$(headers),' < $< > $@-tmp
Z mv $@-tmp $@
Zmalloc/gmalloc.c: malloc/Makefile
Z $(MAKE) -C malloc gmalloc.c
Zmalloc/README: dist-README
Z @rm -f $@
Z cp $< $@
Zmalloc/%: %
Z @rm -f $@
Z cp $< $@
STUNKYFLUFF
set `sum Makefile`
if test 48180 != $1
then
echo Makefile: Checksum error. Is: $1, should be: 48180.
fi
#
#
echo Extracting TODO:
sed 's/^Z//' >TODO <<\STUNKYFLUFF
Z0. Access data structures with accessor macros, then turn the heapinfo
Zinto several arrays for faster access on machines with addressing modes.
ZAlso, this eventually raises the possibility of maintaining multiple
Zheaps.
Z1. Possible heuristic to catch multiple frees. Introduce an extra word
Zof heapinfo that says whether the remaining info is for something
Zbusy or something free. Then we can catch attempts to free already-free
Zlarge blocks, as well as things not belonging to malloc at all. In the
Zcase of a fragment, we can check if the fragment looks like it *already*
Zbelongs to the fragment list, by comparing it with the "first" fragment
Zof the block, or checking its "prev" pointer to see if it points into
Zthe block. Then if it looks like it might we can exhaustively search
Zthe block's free list to see if the fragment is there or not. Extending
Zthe heapinfo structure would have the benefit of making it a power of
Ztwo and thus making array indexing faster, perhaps. Suitably adapted,
Zthis heuristic could also catch invalid pointers passed to realloc.
Z
ZAll of these additional features require the inclusion of <malloc.h>.
Z3. indirect reference allocator: ialloc(), ifree(), irealloc().
Z4. garbage collecting allocator: galloc(), garbage(), gfree(), grealloc().
STUNKYFLUFF
set `sum TODO`
if test 51437 != $1
then
echo TODO: Checksum error. Is: $1, should be: 51437.
fi
#
#
echo Extracting calloc.c:
sed 's/^Z//' >calloc.c <<\STUNKYFLUFF
Z/* Copyright (C) 1991 Free Software Foundation, Inc.
ZThis file is part of the GNU C Library.
Z
ZThe GNU C Library is free software; you can redistribute it and/or
Zmodify it under the terms of the GNU Library General Public License as
Zpublished by the Free Software Foundation; either version 2 of the
ZLicense, or (at your option) any later version.
Z
ZThe GNU C Library is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ZLibrary General Public License for more details.
Z
ZYou should have received a copy of the GNU Library General Public
ZLicense along with the GNU C Library; see the file COPYING.LIB. If
Znot, write to the Free Software Foundation, Inc., 675 Mass Ave,
ZCambridge, MA 02139, USA. */
Z
Z/* IGNORE(@ */
Z#include <ansidecl.h>
Z/* @) */
Z#include <malloc.h>
Z
Z#if defined(__GNU_LIBRARY__) || defined(STDC_HEADERS) || defined(USG)
Z#include <string.h>
Z#else
Z#define memset(s, zero, n) bzero ((s), (n))
Z#endif
Z
Z/* Allocate an array of NMEMB elements each SIZE bytes long.
Z The entire array is initialized to zeros. */
ZPTR
ZDEFUN(calloc, (nmemb, size), register size_t nmemb AND register size_t size)
Z{
Z register PTR result = malloc (nmemb * size);
Z
Z if (result != NULL)
Z (void) memset (result, 0, nmemb * size);
Z
Z return result;
Z}
STUNKYFLUFF
set `sum calloc.c`
if test 48371 != $1
then
echo calloc.c: Checksum error. Is: $1, should be: 48371.
fi
#
#
echo Extracting cfree.c:
sed 's/^Z//' >cfree.c <<\STUNKYFLUFF
Z/* Copyright (C) 1991 Free Software Foundation, Inc.
ZThis file is part of the GNU C Library.
Z
ZThe GNU C Library is free software; you can redistribute it and/or
Zmodify it under the terms of the GNU Library General Public License as
Zpublished by the Free Software Foundation; either version 2 of the
ZLicense, or (at your option) any later version.
Z
ZThe GNU C Library is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ZLibrary General Public License for more details.
Z
ZYou should have received a copy of the GNU Library General Public
ZLicense along with the GNU C Library; see the file COPYING.LIB. If
Znot, write to the Free Software Foundation, Inc., 675 Mass Ave,
ZCambridge, MA 02139, USA. */
Z
Z#include <ansidecl.h>
Z#include <stdlib.h>
Z
Z#undef cfree
Z
Z#include <gnu-stabs.h>
Z
Zfunction_alias(cfree, free, void, (ptr),
Z DEFUN(cfree, (ptr), PTR ptr))
STUNKYFLUFF
set `sum cfree.c`
if test 17488 != $1
then
echo cfree.c: Checksum error. Is: $1, should be: 17488.
fi
#
#
echo Extracting dist-Makefile:
sed 's/^Z//' >dist-Makefile <<\STUNKYFLUFF
Z# Copyright (C) 1991 Free Software Foundation, Inc.
Z# This file is part of the GNU C Library.
Z
Z# The GNU C Library is free software; you can redistribute it and/or
Z# modify it under the terms of the GNU Library General Public License
Z# as published by the Free Software Foundation; either version 2 of
Z# the License, or (at your option) any later version.
Z
Z# The GNU C Library is distributed in the hope that it will be useful,
Z# but WITHOUT ANY WARRANTY; without even the implied warranty of
Z# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Z# Library General Public License for more details.
Z
Z# You should have received a copy of the GNU Library General Public
Z# License along with the GNU C Library; see the file COPYING.LIB. If
Z# not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Z# Cambridge, MA 02139, USA.
Z
Z# Makefile for standalone distribution of malloc.
Z
Z# Use this on System V.
Z#CPPFLAGS = -DUSG
Z
Z.PHONY: all
Zall: libmalloc.a gmalloc.o
Z
Zsources = <DIST-SOURCES>
Zobjects = <DIST-OBJECTS>
Zheaders = <DIST-HEADERS>
Z
Zlibmalloc.a: $(objects)
Z ar crv $@ $(objects)
Z ranlib $@
Z
Z$(objects): $(headers)
Z
Zgmalloc.c: gmalloc-head.c $(headers) $(sources)
Z cat gmalloc-head.c $(headers) $(sources) > $@
Z
Z.c.o:
Z $(CC) $(CFLAGS) $(CPPFLAGS) -I. -c $< $(OUTPUT_OPTION)
Z
Z.PHONY: clean realclean malloc-clean malloc-realclean
Zclean malloc-clean:
Z -rm -f libmalloc.a *.o core
Zrealclean malloc-realclean: clean
Z -rm -f TAGS tags *~
Z
Z# For inside the C library.
Zmalloc.tar malloc.tar.Z:
Z $(MAKE) -C .. $@
STUNKYFLUFF
set `sum dist-Makefile`
if test 58822 != $1
then
echo dist-Makefile: Checksum error. Is: $1, should be: 58822.
fi
#
#
echo Extracting dist-README:
sed 's/^Z//' >dist-README <<\STUNKYFLUFF
ZThis is the standalone distribution of GNU malloc.
ZGNU malloc is part of the GNU C Library, but is also distributed separately.
Z
ZIf you find bugs in GNU malloc, send reports to bug-glibc@prep.ai.mit.edu.
Z
ZGNU malloc is free software. See the file COPYING.LIB for copying conditions.
Z
ZThe makefile builds libmalloc.a and gmalloc.o. If you are using GNU malloc
Zto replace your system's existing malloc package, it is important to make
Zsure you get all GNU functions, not some of the GNU functions and some from
Zthe system library. gmalloc.o has all the functions in one file, so using
Zthat will make sure you don't accidentally mix the two malloc packages.
STUNKYFLUFF
set `sum dist-README`
if test 59167 != $1
then
echo dist-README: Checksum error. Is: $1, should be: 59167.
fi
#
#
echo Extracting free.c:
sed 's/^Z//' >free.c <<\STUNKYFLUFF
Z/* Free a block of memory allocated by `malloc'.
Z Copyright 1990, 1991 Free Software Foundation
Z Written May 1989 by Mike Haertel.
Z
ZThe GNU C Library is free software; you can redistribute it and/or
Zmodify it under the terms of the GNU Library General Public License as
Zpublished by the Free Software Foundation; either version 2 of the
ZLicense, or (at your option) any later version.
Z
ZThe GNU C Library is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ZLibrary General Public License for more details.
Z
ZYou should have received a copy of the GNU Library General Public
ZLicense along with the GNU C Library; see the file COPYING.LIB. If
Znot, write to the Free Software Foundation, Inc., 675 Mass Ave,
ZCambridge, MA 02139, USA.
Z
Z The author may be reached (Email) at the address mike@ai.mit.edu,
Z or (US mail) as Mike Haertel c/o Free Software Foundation. */
Z
Z/* IGNORE(@ */
Z#include <ansidecl.h>
Z#include <stddef.h>
Z#include <stdlib.h>
Z/* @) */
Z
Z#define _MALLOC_INTERNAL
Z#include <malloc.h>
Z
Z/* Debugging hook for free. */
Zvoid EXFUN((*__free_hook), (PTR __ptr));
Z
Z/* List of blocks allocated by memalign. */
Zstruct alignlist *_aligned_blocks = NULL;
Z
Z/* Return memory to the heap.
Z Like `free' but don't call a __free_hook if there is one. */
Zvoid
ZDEFUN(__free, (ptr), PTR ptr)
Z{
Z int type;
Z size_t block, blocks;
Z register size_t i;
Z struct list *prev, *next;
Z
Z block = BLOCK(ptr);
Z
Z type = _heapinfo[block].busy.type;
Z switch (type)
Z {
Z case 0:
Z /* Get as many statistics as early as we can. */
Z --_chunks_used;
Z _bytes_used -= _heapinfo[block].busy.info.size * BLOCKSIZE;
Z _bytes_free += _heapinfo[block].busy.info.size * BLOCKSIZE;
Z
Z /* Find the free cluster previous to this one in the free list.
Z Start searching at the last block referenced; this may benefit
Z programs with locality of allocation. */
Z i = _heapindex;
Z if (i > block)
Z while (i > block)
Z i = _heapinfo[i].free.prev;
Z else
Z {
Z do
Z i = _heapinfo[i].free.next;
Z while (i > 0 && i < block);
Z i = _heapinfo[i].free.prev;
Z }
Z
Z /* Determine how to link this block into the free list. */
Z if (block == i + _heapinfo[i].free.size)
Z {
Z /* Coalesce this block with its predecessor. */
Z _heapinfo[i].free.size += _heapinfo[block].busy.info.size;
Z block = i;
Z }
Z else
Z {
Z /* Really link this block back into the free list. */
Z _heapinfo[block].free.size = _heapinfo[block].busy.info.size;
Z _heapinfo[block].free.next = _heapinfo[i].free.next;
Z _heapinfo[block].free.prev = i;
Z _heapinfo[i].free.next = block;
Z _heapinfo[_heapinfo[block].free.next].free.prev = block;
Z ++_chunks_free;
Z }
Z
Z /* Now that the block is linked in, see if we can coalesce it
Z with its successor (by deleting its successor from the list
Z and adding in its size). */
Z if (block + _heapinfo[block].free.size == _heapinfo[block].free.next)
Z {
Z _heapinfo[block].free.size
Z += _heapinfo[_heapinfo[block].free.next].free.size;
Z _heapinfo[block].free.next
Z = _heapinfo[_heapinfo[block].free.next].free.next;
Z _heapinfo[_heapinfo[block].free.next].free.prev = block;
Z --_chunks_free;
Z }
Z
Z /* Now see if we can return stuff to the system. */
Z blocks = _heapinfo[block].free.size;
Z if (blocks >= FINAL_FREE_BLOCKS && block + blocks == _heaplimit
Z && (*__morecore)(0) == ADDRESS(block + blocks))
Z {
Z register size_t bytes = blocks * BLOCKSIZE;
Z _heaplimit -= blocks;
Z (*__morecore)(- bytes);
Z _heapinfo[_heapinfo[block].free.prev].free.next
Z = _heapinfo[block].free.next;
Z _heapinfo[_heapinfo[block].free.next].free.prev
Z = _heapinfo[block].free.prev;
Z block = _heapinfo[block].free.prev;
Z --_chunks_free;
Z _bytes_free -= bytes;
Z }
Z
Z /* Set the next search to begin at this block. */
Z _heapindex = block;
Z break;
Z
Z default:
Z /* Do some of the statistics. */
Z --_chunks_used;
Z _bytes_used -= 1 << type;
Z ++_chunks_free;
Z _bytes_free += 1 << type;
Z
Z /* Get the address of the first free fragment in this block. */
Z prev = (struct list *) ((char *) ADDRESS(block) +
Z (_heapinfo[block].busy.info.frag.first << type));
Z
Z if (_heapinfo[block].busy.info.frag.nfree == (BLOCKSIZE >> type) - 1)
Z {
Z /* If all fragments of this block are free, remove them
Z from the fragment list and free the whole block. */
Z next = prev;
Z for (i = 1; i < (size_t) (BLOCKSIZE >> type); ++i)
Z next = next->next;
Z prev->prev->next = next;
Z if (next != NULL)
Z next->prev = prev->prev;
Z _heapinfo[block].busy.type = 0;
Z _heapinfo[block].busy.info.size = 1;
Z
Z /* Keep the statistics accurate. */
Z ++_chunks_used;
Z _bytes_used += BLOCKSIZE;
Z _chunks_free -= BLOCKSIZE >> type;
Z _bytes_free -= BLOCKSIZE;
Z
Z free(ADDRESS(block));
Z }
Z else if (_heapinfo[block].busy.info.frag.nfree != 0)
Z {
Z /* If some fragments of this block are free, link this
Z fragment into the fragment list after the first free
Z fragment of this block. */
Z next = (struct list *) ptr;
Z next->next = prev->next;
Z next->prev = prev;
Z prev->next = next;
Z if (next->next != NULL)
Z next->next->prev = next;
Z ++_heapinfo[block].busy.info.frag.nfree;
Z }
Z else
Z {
Z /* No fragments of this block are free, so link this
Z fragment into the fragment list and announce that
Z it is the first free fragment of this block. */
Z prev = (struct list *) ptr;
Z _heapinfo[block].busy.info.frag.nfree = 1;
Z _heapinfo[block].busy.info.frag.first = (unsigned long int)
Z ((unsigned long int) ((char *) ptr - (char *) NULL)
Z % BLOCKSIZE >> type);
Z prev->next = _fraghead[type].next;
Z prev->prev = &_fraghead[type];
Z prev->prev->next = prev;
Z if (prev->next != NULL)
Z prev->next->prev = prev;
Z }
Z break;
Z }
Z}
Z
Z/* Return memory to the heap. */
Zvoid
ZDEFUN(free, (ptr), PTR ptr)
Z{
Z register struct alignlist *l;
Z
Z if (ptr == NULL)
Z return;
Z
Z for (l = _aligned_blocks; l != NULL; l = l->next)
Z if (l->aligned == ptr)
Z {
Z l->aligned = NULL; /* Mark the slot in the list as free. */
Z ptr = l->exact;
Z break;
Z }
Z
Z if (__free_hook != NULL)
Z (*__free_hook) (ptr);
Z else
Z __free (ptr);
Z}
STUNKYFLUFF
set `sum free.c`
if test 53143 != $1
then
echo free.c: Checksum error. Is: $1, should be: 53143.
fi
#
#
echo Extracting gmalloc-head.c:
sed 's/^Z//' >gmalloc-head.c <<\STUNKYFLUFF
Z/* DO NOT EDIT THIS FILE -- it is automagically generated. -*- C -*- */
Z
Z#define SKELETON
Z
Z#if defined(__GNU_LIBRARY__) || defined(STDC_HEADERS) || defined(USG)
Z#include <string.h>
Z#else
Z#define memset(s, zero, n) bzero ((s), (n))
Z#define memcpy(d, s, n) bcopy ((s), (d), (n))
Z#define memmove(d, s, n) bcopy ((s), (d), (n))
Z#endif
Z
Z#define _MALLOC_INTERNAL
Z
Z/* The malloc headers and source files from the C library follow here. */
STUNKYFLUFF
set `sum gmalloc-head.c`
if test 33445 != $1
then
echo gmalloc-head.c: Checksum error. Is: $1, should be: 33445.
fi
#
#
echo Extracting malloc.c:
sed 's/^Z//' >malloc.c <<\STUNKYFLUFF
Z/* Memory allocator `malloc'.
Z Copyright 1990, 1991 Free Software Foundation
Z Written May 1989 by Mike Haertel.
Z
ZThe GNU C Library is free software; you can redistribute it and/or
Zmodify it under the terms of the GNU Library General Public License as
Zpublished by the Free Software Foundation; either version 2 of the
ZLicense, or (at your option) any later version.
Z
ZThe GNU C Library is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ZLibrary General Public License for more details.
Z
ZYou should have received a copy of the GNU Library General Public
ZLicense along with the GNU C Library; see the file COPYING.LIB. If
Znot, write to the Free Software Foundation, Inc., 675 Mass Ave,
ZCambridge, MA 02139, USA.
Z
Z The author may be reached (Email) at the address mike@ai.mit.edu,
Z or (US mail) as Mike Haertel c/o Free Software Foundation. */
Z
Z/* IGNORE(@ */
Z#include <ansidecl.h>
Z#include <stddef.h>
Z#include <stdlib.h>
Z/* @) */
Z
Z#define _MALLOC_INTERNAL
Z#include <malloc.h>
Z
Z#if defined(__GNU_LIBRARY__) || defined(STDC_HEADERS) || defined(USG)
Z#include <string.h>
Z#else
Z#define memset(s, zero, n) bzero ((s), (n))
Z#define memcpy(d, s, n) bcopy ((s), (d), (n))
Z#endif
Z
Z
Z/* How to really get more memory. */
ZPTR EXFUN((*__morecore), (ptrdiff_t __size)) = __default_morecore;
Z
Z/* Debugging hook for `malloc'. */
ZPTR EXFUN((*__malloc_hook), (size_t __size));
Z
Z/* Pointer to the base of the first block. */
Zchar *_heapbase;
Z
Z/* Block information table. Allocated with align/__free (not malloc/free). */
Zmalloc_info *_heapinfo;
Z
Z/* Number of info entries. */
Zstatic size_t heapsize;
Z
Z/* Search index in the info table. */
Zsize_t _heapindex;
Z
Z/* Limit of valid info table indices. */
Zsize_t _heaplimit;
Z
Z/* Free lists for each fragment size. */
Zstruct list _fraghead[BLOCKLOG];
Z
Z/* Instrumentation. */
Zsize_t _chunks_used;
Zsize_t _bytes_used;
Zsize_t _chunks_free;
Zsize_t _bytes_free;
Z
Z/* Are you experienced? */
Zint __malloc_initialized;
Z
Z/* Aligned allocation. */
Zstatic PTR
ZDEFUN(align, (size), size_t size)
Z{
Z PTR result;
Z unsigned long int adj;
Z
Z result = (*__morecore)(size);
Z adj = (unsigned long int) ((unsigned long int) ((char *) result -
Z (char *) NULL)) % BLOCKSIZE;
Z if (adj != 0)
Z {
Z adj = BLOCKSIZE - adj;
Z (void) (*__morecore)(adj);
Z result = (char *) result + adj;
Z }
Z return result;
Z}
Z
Z/* Set everything up and remember that we have. */
Zstatic int
ZDEFUN_VOID(initialize)
Z{
Z heapsize = HEAP / BLOCKSIZE;
Z _heapinfo = (malloc_info *) align(heapsize * sizeof(malloc_info));
Z if (_heapinfo == NULL)
Z return 0;
Z memset(_heapinfo, 0, heapsize * sizeof(malloc_info));
Z _heapinfo[0].free.size = 0;
Z _heapinfo[0].free.next = _heapinfo[0].free.prev = 0;
Z _heapindex = 0;
Z _heapbase = (char *) _heapinfo;
Z __malloc_initialized = 1;
Z return 1;
Z}
Z
Z/* Get neatly aligned memory, initializing or
Z growing the heap info table as necessary. */
Zstatic PTR
ZDEFUN(morecore, (size), size_t size)
Z{
Z PTR result;
Z malloc_info *newinfo, *oldinfo;
Z size_t newsize;
Z
Z result = align(size);
Z if (result == NULL)
Z return NULL;
Z
Z /* Check if we need to grow the info table. */
Z if ((size_t) BLOCK((char *) result + size) > heapsize)
Z {
Z newsize = heapsize;
Z while ((size_t) BLOCK((char *) result + size) > newsize)
Z newsize *= 2;
Z newinfo = (malloc_info *) align(newsize * sizeof(malloc_info));
Z if (newinfo == NULL)
Z {
Z (*__morecore)(- size);
Z return NULL;
Z }
Z memset(newinfo, 0, newsize * sizeof(malloc_info));
Z memcpy(newinfo, _heapinfo, heapsize * sizeof(malloc_info));
Z oldinfo = _heapinfo;
Z newinfo[BLOCK(oldinfo)].busy.type = 0;
Z newinfo[BLOCK(oldinfo)].busy.info.size
Z = BLOCKIFY(heapsize * sizeof(malloc_info));
Z _heapinfo = newinfo;
Z __free(oldinfo);
Z heapsize = newsize;
Z }
Z
Z _heaplimit = BLOCK((char *) result + size);
Z return result;
Z}
Z
Z/* Allocate memory from the heap. */
ZPTR
ZDEFUN(malloc, (size), size_t size)
Z{
Z PTR result;
Z size_t block, blocks, lastblocks, start;
Z register size_t i;
Z struct list *next;
Z
Z if (size == 0)
Z return NULL;
Z
Z if (__malloc_hook != NULL)
Z return (*__malloc_hook)(size);
Z
Z if (!__malloc_initialized)
Z if (!initialize())
Z return NULL;
Z
Z if (size < sizeof(struct list))
Z size = sizeof(struct list);
Z
Z /* Determine the allocation policy based on the request size. */
Z if (size <= BLOCKSIZE / 2)
Z {
Z /* Small allocation to receive a fragment of a block.
Z Determine the logarithm to base two of the fragment size. */
Z register size_t log = 1;
Z --size;
Z while ((size /= 2) != 0)
Z ++log;
Z
Z /* Look in the fragment lists for a
Z free fragment of the desired size. */
Z next = _fraghead[log].next;
Z if (next != NULL)
Z {
Z /* There are free fragments of this size.
Z Pop a fragment out of the fragment list and return it.
Z Update the block's nfree and first counters. */
Z result = (PTR) next;
Z next->prev->next = next->next;
Z if (next->next != NULL)
Z next->next->prev = next->prev;
Z block = BLOCK(result);
Z if (--_heapinfo[block].busy.info.frag.nfree != 0)
Z _heapinfo[block].busy.info.frag.first = (unsigned long int)
Z ((unsigned long int) ((char *) next->next - (char *) NULL)
Z % BLOCKSIZE) >> log;
Z
Z /* Update the statistics. */
Z ++_chunks_used;
Z _bytes_used += 1 << log;
Z --_chunks_free;
Z _bytes_free -= 1 << log;
Z }
Z else
Z {
Z /* No free fragments of the desired size, so get a new block
Z and break it into fragments, returning the first. */
Z result = malloc(BLOCKSIZE);
Z if (result == NULL)
Z return NULL;
Z
Z /* Link all fragments but the first into the free list. */
Z for (i = 1; i < (size_t) (BLOCKSIZE >> log); ++i)
Z {
Z next = (struct list *) ((char *) result + (i << log));
Z next->next = _fraghead[log].next;
Z next->prev = &_fraghead[log];
Z next->prev->next = next;
Z if (next->next != NULL)
Z next->next->prev = next;
Z }
Z
Z /* Initialize the nfree and first counters for this block. */
Z block = BLOCK(result);
Z _heapinfo[block].busy.type = log;
Z _heapinfo[block].busy.info.frag.nfree = i - 1;
Z _heapinfo[block].busy.info.frag.first = i - 1;
Z
Z _chunks_free += (BLOCKSIZE >> log) - 1;
Z _bytes_free += BLOCKSIZE - (1 << log);
Z _bytes_used -= BLOCKSIZE - (1 << log);
Z }
Z }
Z else
Z {
Z /* Large allocation to receive one or more blocks.
Z Search the free list in a circle starting at the last place visited.
Z If we loop completely around without finding a large enough
Z space we will have to get more memory from the system. */
Z blocks = BLOCKIFY(size);
Z start = block = MALLOC_SEARCH_START;
Z while (_heapinfo[block].free.size < blocks)
Z {
Z block = _heapinfo[block].free.next;
Z if (block == start)
Z {
Z /* Need to get more from the system. Check to see if
Z the new core will be contiguous with the final free
Z block; if so we don't need to get as much. */
Z block = _heapinfo[0].free.prev;
Z lastblocks = _heapinfo[block].free.size;
Z if (_heaplimit != 0 && block + lastblocks == _heaplimit &&
Z (*__morecore)(0) == ADDRESS(block + lastblocks) &&
Z (morecore((blocks - lastblocks) * BLOCKSIZE)) != NULL)
Z {
Z _heapinfo[block].free.size = blocks;
Z _bytes_free += (blocks - lastblocks) * BLOCKSIZE;
Z continue;
Z }
Z result = morecore(blocks * BLOCKSIZE);
Z if (result == NULL)
Z return NULL;
Z block = BLOCK(result);
Z _heapinfo[block].busy.type = 0;
Z _heapinfo[block].busy.info.size = blocks;
Z ++_chunks_used;
Z _bytes_used += blocks * BLOCKSIZE;
Z return result;
Z }
Z }
Z
Z /* At this point we have found a suitable free list entry.
Z Figure out how to remove what we need from the list. */
Z result = ADDRESS(block);
Z if (_heapinfo[block].free.size > blocks)
Z {
Z /* The block we found has a bit left over,
Z so relink the tail end back into the free list. */
Z _heapinfo[block + blocks].free.size
Z = _heapinfo[block].free.size - blocks;
Z _heapinfo[block + blocks].free.next
Z = _heapinfo[block].free.next;
Z _heapinfo[block + blocks].free.prev
Z = _heapinfo[block].free.prev;
Z _heapinfo[_heapinfo[block].free.prev].free.next
Z = _heapinfo[_heapinfo[block].free.next].free.prev
Z = _heapindex = block + blocks;
Z }
Z else
Z {
Z /* The block exactly matches our requirements,
Z so just remove it from the list. */
Z _heapinfo[_heapinfo[block].free.next].free.prev
Z = _heapinfo[block].free.prev;
Z _heapinfo[_heapinfo[block].free.prev].free.next
Z = _heapindex = _heapinfo[block].free.next;
Z --_chunks_free;
Z }
Z
Z _heapinfo[block].busy.type = 0;
Z _heapinfo[block].busy.info.size = blocks;
Z ++_chunks_used;
Z _bytes_used += blocks * BLOCKSIZE;
Z _bytes_free -= blocks * BLOCKSIZE;
Z }
Z
Z return result;
Z}
STUNKYFLUFF
set `sum malloc.c`
if test 64456 != $1
then
echo malloc.c: Checksum error. Is: $1, should be: 64456.
fi
#
#
echo Extracting malloc.h:
sed 's/^Z//' >malloc.h <<\STUNKYFLUFF
Z/* Declarations for `malloc' and friends.
Z Copyright 1990, 1991 Free Software Foundation
Z Written May 1989 by Mike Haertel.
Z
ZThe GNU C Library is free software; you can redistribute it and/or
Zmodify it under the terms of the GNU Library General Public License as
Zpublished by the Free Software Foundation; either version 2 of the
ZLicense, or (at your option) any later version.
Z
ZThe GNU C Library is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ZLibrary General Public License for more details.
Z
ZYou should have received a copy of the GNU Library General Public
ZLicense along with the GNU C Library; see the file COPYING.LIB. If
Znot, write to the Free Software Foundation, Inc., 675 Mass Ave,
ZCambridge, MA 02139, USA.
Z
Z The author may be reached (Email) at the address mike@ai.mit.edu,
Z or (US mail) as Mike Haertel c/o Free Software Foundation. */
Z
Z#ifndef _MALLOC_H
Z
Z#define _MALLOC_H 1
Z
Z/* IGNORE(@ */
Z#include <features.h>
Z#define __need_NULL
Z#define __need_size_t
Z#define __need_ptrdiff_t
Z#include <stddef.h>
Z/* @) */
Z
Z#ifndef NULL
Z#define NULL 0
Z#endif
Z
Z#ifdef __STDC__
Z#include <stddef.h>
Z#else
Z#undef size_t
Z#define size_t unsigned int
Z#endif
Z
Z
Z/* Allocate SIZE bytes of memory. */
Zextern PTR EXFUN(malloc, (size_t __size));
Z/* Re-allocate the previously allocated block
Z in PTR, making the new block SIZE bytes long. */
Zextern PTR EXFUN(realloc, (PTR __ptr, size_t __size));
Z/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
Zextern PTR EXFUN(calloc, (size_t __nmemb, size_t __size));
Z/* Free a block allocated by `malloc', `realloc' or `calloc'. */
Zextern void EXFUN(free, (PTR __ptr));
Z
Z/* Allocate SIZE bytes allocated to ALIGNMENT bytes. */
Zextern PTR EXFUN(memalign, (size_t __alignment, size_t __size));
Z
Z/* Allocate SIZE bytes on a page boundary. */
Zextern PTR EXFUN(valloc, (size_t __size));
Z
Z
Z#ifdef _MALLOC_INTERNAL
Z
Z#if defined(__GNU_LIBRARY__) || defined(__STDC__)
Z#include <limits.h>
Z#else
Z#define CHAR_BIT 8
Z#endif
Z
Z/* The allocator divides the heap into blocks of fixed size; large
Z requests receive one or more whole blocks, and small requests
Z receive a fragment of a block. Fragment sizes are powers of two,
Z and all fragments of a block are the same size. When all the
Z fragments in a block have been freed, the block itself is freed. */
Z#define INT_BIT (CHAR_BIT * sizeof(int))
Z#define BLOCKLOG (INT_BIT > 16 ? 12 : 9)
Z#define BLOCKSIZE (1 << BLOCKLOG)
Z#define BLOCKIFY(SIZE) (((SIZE) + BLOCKSIZE - 1) / BLOCKSIZE)
Z
Z/* Determine the amount of memory spanned by the initial heap table
Z (not an absolute limit). */
Z#define HEAP (INT_BIT > 16 ? 4194304 : 65536)
Z
Z/* Number of contiguous free blocks allowed to build up at the end of
Z memory before they will be returned to the system. */
Z#define FINAL_FREE_BLOCKS 8
Z
Z/* Where to start searching the free list when looking for new memory.
Z The two possible values are 0 and _heapindex. Starting at 0 seems
Z to reduce total memory usage, while starting at _heapindex seems to
Z run faster. */
Z#define MALLOC_SEARCH_START _heapindex
Z
Z/* Data structure giving per-block information. */
Ztypedef union
Z {
Z /* Heap information for a busy block. */
Z struct
Z {
Z /* Zero for a large block, or positive giving the
Z logarithm to the base two of the fragment size. */
Z int type;
Z union
Z {
Z struct
Z {
Z size_t nfree; /* Free fragments in a fragmented block. */
Z size_t first; /* First free fragment of the block. */
Z } frag;
Z /* Size (in blocks) of a large cluster. */
Z size_t size;
Z } info;
Z } busy;
Z /* Heap information for a free block (that may be the first of
Z a free cluster). */
Z struct
Z {
Z size_t size; /* Size (in blocks) of a free cluster. */
Z size_t next; /* Index of next free cluster. */
Z size_t prev; /* Index of previous free cluster. */
Z } free;
Z } malloc_info;
Z
Z/* Pointer to first block of the heap. */
Zextern char *_heapbase;
Z
Z/* Table indexed by block number giving per-block information. */
Zextern malloc_info *_heapinfo;
Z
Z/* Address to block number and vice versa. */
Z#define BLOCK(A) (((char *) (A) - _heapbase) / BLOCKSIZE + 1)
Z/* The following line MUST be split! m4 will not process it otherwise. */
Z#define ADDRESS(B) \
Z ((PTR) (((B) - 1) * BLOCKSIZE + _heapbase))
Z
Z/* Current search index for the heap table. */
Zextern size_t _heapindex;
Z
Z/* Limit of valid info table indices. */
Zextern size_t _heaplimit;
Z
Z/* Doubly linked lists of free fragments. */
Zstruct list
Z {
Z struct list *next;
Z struct list *prev;
Z };
Z
Z/* Free list headers for each fragment size. */
Zextern struct list _fraghead[];
Z
Z/* List of blocks allocated with `memalign' (or `valloc'). */
Zstruct alignlist
Z {
Z struct alignlist *next;
Z PTR aligned; /* The address that memaligned returned. */
Z PTR exact; /* The address that malloc returned. */
Z };
Zextern struct alignlist *_aligned_blocks;
Z
Z/* Instrumentation. */
Zextern size_t _chunks_used;
Zextern size_t _bytes_used;
Zextern size_t _chunks_free;
Zextern size_t _bytes_free;
Z
Z/* Internal version of `free' used in `morecore'. */
Zextern void EXFUN(__free, (PTR __ptr));
Z
Z#endif /* _MALLOC_INTERNAL. */
Z
Z/* Underlying allocation function; successive calls should
Z return contiguous pieces of memory. */
Zextern PTR EXFUN((*__morecore), (ptrdiff_t __size));
Z
Z/* Default value of `__morecore'. */
Zextern PTR EXFUN(__default_morecore, (ptrdiff_t __size));
Z
Z/* Nonzero if `malloc' has been called and done its initialization. */
Zextern int __malloc_initialized;
Z
Z/* Hooks for debugging versions. */
Zextern void EXFUN((*__free_hook), (PTR __ptr));
Zextern PTR EXFUN((*__malloc_hook), (size_t __size));
Zextern PTR EXFUN((*__realloc_hook), (PTR __ptr, size_t __size));
Z
Z/* Activate a standard collection of debugging hooks. */
Zextern void EXFUN(mcheck, (void EXFUN((*__func), (void))));
Z
Z/* Statistics available to the user. */
Zstruct mstats
Z {
Z size_t bytes_total; /* Total size of the heap. */
Z size_t chunks_used; /* Chunks allocated by the user. */
Z size_t bytes_used; /* Byte total of user-allocated chunks. */
Z size_t chunks_free; /* Chunks in the free list. */
Z size_t bytes_free; /* Byte total of chunks in the free list. */
Z };
Z
Z/* Pick up the current statistics. */
Zextern struct mstats EXFUN(mstats, (NOARGS));
Z
Z#endif /* malloc.h */
STUNKYFLUFF
set `sum malloc.h`
if test 10676 != $1
then
echo malloc.h: Checksum error. Is: $1, should be: 10676.
fi
#
#
echo Extracting mcheck-init.c:
sed 's/^Z//' >mcheck-init.c <<\STUNKYFLUFF
Z/* Copyright (C) 1991 Free Software Foundation, Inc.
ZThis file is part of the GNU C Library.
Z
ZThe GNU C Library is free software; you can redistribute it and/or
Zmodify it under the terms of the GNU Library General Public License as
Zpublished by the Free Software Foundation; either version 2 of the
ZLicense, or (at your option) any later version.
Z
ZThe GNU C Library is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ZLibrary General Public License for more details.
Z
ZYou should have received a copy of the GNU Library General Public
ZLicense along with the GNU C Library; see the file COPYING.LIB. If
Znot, write to the Free Software Foundation, Inc., 675 Mass Ave,
ZCambridge, MA 02139, USA. */
Z
Z/* The object of this file should be installed as libmcheck.a,
Z so one can do -lmcheck to turn on mcheck. */
Z
Z#ifdef __GNU_STAB__
Z
Z#include <ansidecl.h>
Z#include <malloc.h>
Z#include <gnu-stabs.h>
Z
Zstatic void
ZDEFUN_VOID (turn_on_mcheck)
Z{
Z mcheck (NULL);
Z}
Z
Ztext_set_element (__libc_subinit, turn_on_mcheck);
Z
Z#endif
STUNKYFLUFF
set `sum mcheck-init.c`
if test 31836 != $1
then
echo mcheck-init.c: Checksum error. Is: $1, should be: 31836.
fi
#
#
echo Extracting mcheck.c:
sed 's/^Z//' >mcheck.c <<\STUNKYFLUFF
Z/* Standard debugging hooks for `malloc'.
Z Copyright 1990, 1991 Free Software Foundation
Z Written May 1989 by Mike Haertel.
Z
ZThe GNU C Library is free software; you can redistribute it and/or
Zmodify it under the terms of the GNU Library General Public License as
Zpublished by the Free Software Foundation; either version 2 of the
ZLicense, or (at your option) any later version.
Z
ZThe GNU C Library is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ZLibrary General Public License for more details.
Z
ZYou should have received a copy of the GNU Library General Public
ZLicense along with the GNU C Library; see the file COPYING.LIB. If
Znot, write to the Free Software Foundation, Inc., 675 Mass Ave,
ZCambridge, MA 02139, USA.
Z
Z The author may be reached (Email) at the address mike@ai.mit.edu,
Z or (US mail) as Mike Haertel c/o Free Software Foundation. */
Z
Z/* IGNORE(@ */
Z#include <ansidecl.h>
Z#include <stdlib.h>
Z/* @) */
Z
Z#include <malloc.h>
Z
Z/* Old hook values. */
Zstatic void EXFUN((*old_free_hook), (PTR ptr));
Zstatic PTR EXFUN((*old_malloc_hook), (size_t size));
Zstatic PTR EXFUN((*old_realloc_hook), (PTR ptr, size_t size));
Z
Z/* Function to call when something awful happens. */
Zextern void EXFUN(abort, (NOARGS));
Zstatic void EXFUN((*abortfunc), (NOARGS)) = (void EXFUN((*), (NOARGS))) abort;
Z
Z/* Arbitrary magical numbers. */
Z#define MAGICWORD 0xfedabeeb
Z#define MAGICBYTE ((char) 0xd7)
Z
Zstruct hdr
Z {
Z size_t size; /* Exact size requested by user. */
Z unsigned long int magic; /* Magic number to check header integrity. */
Z };
Z
Zstatic void
ZDEFUN(checkhdr, (hdr), CONST struct hdr *hdr)
Z{
Z if (hdr->magic != MAGICWORD || ((char *) &hdr[1])[hdr->size] != MAGICBYTE)
Z (*abortfunc)();
Z}
Z
Zstatic void
ZDEFUN(freehook, (ptr), PTR ptr)
Z{
Z struct hdr *hdr = ((struct hdr *) ptr) - 1;
Z checkhdr(hdr);
Z hdr->magic = 0;
Z __free_hook = old_free_hook;
Z free(hdr);
Z __free_hook = freehook;
Z}
Z
Zstatic PTR
ZDEFUN(mallochook, (size), size_t size)
Z{
Z struct hdr *hdr;
Z
Z __malloc_hook = old_malloc_hook;
Z hdr = (struct hdr *) malloc (sizeof(struct hdr) + size + 1);
Z __malloc_hook = mallochook;
Z if (hdr == NULL)
Z return NULL;
Z
Z hdr->size = size;
Z hdr->magic = MAGICWORD;
Z ((char *) &hdr[1])[size] = MAGICBYTE;
Z return (PTR) (hdr + 1);
Z}
Z
Zstatic PTR
ZDEFUN(reallochook, (ptr, size), PTR ptr AND size_t size)
Z{
Z struct hdr *hdr = ((struct hdr *) ptr) - 1;
Z
Z checkhdr(hdr);
Z __free_hook = old_free_hook;
Z __malloc_hook = old_malloc_hook;
Z __realloc_hook = old_realloc_hook;
Z hdr = (struct hdr *) realloc((PTR) hdr, sizeof(struct hdr) + size + 1);
Z __free_hook = freehook;
Z __malloc_hook = mallochook;
Z __realloc_hook = reallochook;
Z if (hdr == NULL)
Z return NULL;
Z
Z hdr->size = size;
Z ((char *) &hdr[1])[size] = MAGICBYTE;
Z return (PTR) (hdr + 1);
Z}
Z
Zvoid
ZDEFUN(mcheck, (func), void EXFUN((*func), (void)))
Z{
Z static int mcheck_used = 0;
Z
Z if (func != NULL)
Z abortfunc = func;
Z
Z /* These hooks may not be safely inserted if malloc is already in use. */
Z if (!__malloc_initialized && !mcheck_used)
Z {
Z old_free_hook = __free_hook;
Z __free_hook = freehook;
Z old_malloc_hook = __malloc_hook;
Z __malloc_hook = mallochook;
Z old_realloc_hook = __realloc_hook;
Z __realloc_hook = reallochook;
Z mcheck_used = 1;
Z }
Z}
STUNKYFLUFF
set `sum mcheck.c`
if test 15283 != $1
then
echo mcheck.c: Checksum error. Is: $1, should be: 15283.
fi
#
#
echo Extracting memalign.c:
sed 's/^Z//' >memalign.c <<\STUNKYFLUFF
Z/* Copyright (C) 1991 Free Software Foundation, Inc.
ZThis file is part of the GNU C Library.
Z
ZThe GNU C Library is free software; you can redistribute it and/or
Zmodify it under the terms of the GNU Library General Public License as
Zpublished by the Free Software Foundation; either version 2 of the
ZLicense, or (at your option) any later version.
Z
ZThe GNU C Library is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ZLibrary General Public License for more details.
Z
ZYou should have received a copy of the GNU Library General Public
ZLicense along with the GNU C Library; see the file COPYING.LIB. If
Znot, write to the Free Software Foundation, Inc., 675 Mass Ave,
ZCambridge, MA 02139, USA. */
Z
Z/* IGNORE(@ */
Z#include <ansidecl.h>
Z#include <stdlib.h>
Z/* @) */
Z
Z#define _MALLOC_INTERNAL
Z#include <malloc.h>
Z
ZPTR
ZDEFUN(memalign, (alignment, size),
Z size_t alignment AND size_t size)
Z{
Z PTR result;
Z unsigned long int adj;
Z
Z size = ((size + alignment - 1) / alignment) * alignment;
Z
Z result = malloc (size);
Z if (result == NULL)
Z return NULL;
Z adj = (unsigned long int) ((unsigned long int) ((char *) result -
Z (char *) NULL)) % alignment;
Z if (adj != 0)
Z {
Z struct alignlist *l;
Z for (l = _aligned_blocks; l != NULL; l = l->next)
Z if (l->aligned == NULL)
Z /* This slot is free. Use it. */
Z break;
Z if (l == NULL)
Z {
Z l = (struct alignlist *) malloc (sizeof (struct alignlist));
Z if (l == NULL)
Z {
Z free (result);
Z return NULL;
Z }
Z }
Z l->exact = result;
Z result = l->aligned = (char *) result + alignment - adj;
Z l->next = _aligned_blocks;
Z _aligned_blocks = l;
Z }
Z
Z return result;
Z}
STUNKYFLUFF
set `sum memalign.c`
if test 11691 != $1
then
echo memalign.c: Checksum error. Is: $1, should be: 11691.
fi
#
#
echo Extracting mstats.c:
sed 's/^Z//' >mstats.c <<\STUNKYFLUFF
Z/* Access the statistics maintained by `malloc'.
Z Copyright 1990, 1991 Free Software Foundation
Z Written May 1989 by Mike Haertel.
Z
ZThe GNU C Library is free software; you can redistribute it and/or
Zmodify it under the terms of the GNU Library General Public License as
Zpublished by the Free Software Foundation; either version 2 of the
ZLicense, or (at your option) any later version.
Z
ZThe GNU C Library is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ZLibrary General Public License for more details.
Z
ZYou should have received a copy of the GNU Library General Public
ZLicense along with the GNU C Library; see the file COPYING.LIB. If
Znot, write to the Free Software Foundation, Inc., 675 Mass Ave,
ZCambridge, MA 02139, USA.
Z
Z The author may be reached (Email) at the address mike@ai.mit.edu,
Z or (US mail) as Mike Haertel c/o Free Software Foundation. */
Z
Z/* IGNORE(@ */
Z#include <ansidecl.h>
Z/* @) */
Z
Z#define _MALLOC_INTERNAL
Z#include <malloc.h>
Z
Zstruct mstats
ZDEFUN_VOID(mstats)
Z{
Z struct mstats result;
Z
Z result.bytes_total = (char *) (*__morecore)(0) - _heapbase;
Z result.chunks_used = _chunks_used;
Z result.bytes_used = _bytes_used;
Z result.chunks_free = _chunks_free;
Z result.bytes_free = _bytes_free;
Z return result;
Z}
STUNKYFLUFF
set `sum mstats.c`
if test 51328 != $1
then
echo mstats.c: Checksum error. Is: $1, should be: 51328.
fi
#
#
echo Extracting mtrace.awk:
sed 's/^Z//' >mtrace.awk <<\STUNKYFLUFF
Z#
Z# Awk program to analyze mtrace.c output.
Z#
Z$1 == "+" { if (allocated[$2] != "")
Z print "+", $2, "Alloc", NR, "duplicate:", allocated[$2];
Z else
Z allocated[$2] = $3;
Z }
Z$1 == "-" { if (allocated[$2] != "") {
Z allocated[$2] = "";
Z if (allocated[$2] != "")
Z print "DELETE FAILED", $2, allocated[$2];
Z } else
Z print "-", $2, "Free", NR, "was never alloc'd";
Z }
Z$1 == "<" { if (allocated[$2] != "")
Z allocated[$2] = "";
Z else
Z print "-", $2, "Realloc", NR, "was never alloc'd";
Z }
Z$1 == ">" { if (allocated[$2] != "")
Z print "+", $2, "Realloc", NR, "duplicate:", allocated[$2];
Z else
Z allocated[$2] = $3;
Z }
Z
Z# Ignore "= Start"
Z$1 == "=" { }
Z# Ignore failed realloc attempts for now
Z$1 == "!" { }
Z
Z
ZEND { for (x in allocated)
Z if (allocated[x] != "")
Z print "+", x, allocated[x];
Z }
STUNKYFLUFF
set `sum mtrace.awk`
if test 57510 != $1
then
echo mtrace.awk: Checksum error. Is: $1, should be: 57510.
fi
#
#
echo Extracting mtrace.c:
sed 's/^Z//' >mtrace.c <<\STUNKYFLUFF
Z/* More debugging hooks for `malloc'.
Z Copyright 1991 Free Software Foundation
Z Written April 2, 1991 by John Gilmore of Cygnus Support
Z Based on mcheck.c by Mike Haertel.
Z
ZThis program is free software; you can redistribute it and/or modify
Zit under the terms of the GNU General Public License as published by
Zthe Free Software Foundation; either version 2 of the License, or
Z(at your option) any later version.
Z
ZThis program is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
ZGNU General Public License for more details.
Z
ZYou should have received a copy of the GNU General Public License
Zalong with this program; if not, write to the Free Software
ZFoundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
Z
Z/* IGNORE(@ */
Z#include <ansidecl.h>
Z#include <stdlib.h>
Z/* @) */
Z
Z#include <stdio.h>
Z#include <malloc.h>
Z
Z#ifndef __GNU_LIBRARY__
Zextern char *getenv ();
Z#endif
Z
Zstatic FILE *mallstream;
Zstatic char mallenv[] = "MALLOC_TRACE";
Zstatic char mallbuf[BUFSIZ]; /* Buffer for the output. */
Z
Z/* Address to breakpoint on accesses to... */
ZPTR mallwatch;
Z
Z/* Old hook values. */
Zstatic void EXFUN((*old_free_hook), (PTR ptr));
Zstatic PTR EXFUN((*old_malloc_hook), (size_t size));
Zstatic PTR EXFUN((*old_realloc_hook), (PTR ptr, size_t size));
Z
Z/* This function is called when the block being alloc'd, realloc'd, or
Z freed has an address matching the variable "mallwatch". In a debugger,
Z set "mallwatch" to the address of interest, then put a breakpoint on
Z tr_break. */
Z
Zvoid
ZDEFUN_VOID(tr_break)
Z{
Z}
Z
Zstatic void
ZDEFUN(tr_freehook, (ptr), PTR ptr)
Z{
Z fprintf(mallstream, "- %p\n", ptr); /* Be sure to print it first. */
Z if (ptr == mallwatch)
Z tr_break ();
Z __free_hook = old_free_hook;
Z free (ptr);
Z __free_hook = tr_freehook;
Z}
Z
Zstatic PTR
ZDEFUN(tr_mallochook, (size), size_t size)
Z{
Z PTR hdr;
Z
Z __malloc_hook = old_malloc_hook;
Z hdr = (PTR) malloc (size);
Z __malloc_hook = tr_mallochook;
Z
Z /* We could be printing a NULL here; that's OK. */
Z fprintf (mallstream, "+ %p %x\n", hdr, size);
Z
Z if (hdr == mallwatch)
Z tr_break ();
Z
Z return hdr;
Z}
Z
Zstatic PTR
ZDEFUN(tr_reallochook, (ptr, size), PTR ptr AND size_t size)
Z{
Z PTR hdr;
Z
Z if (ptr == mallwatch)
Z tr_break ();
Z
Z __free_hook = old_free_hook;
Z __malloc_hook = old_malloc_hook;
Z __realloc_hook = old_realloc_hook;
Z hdr = (PTR) realloc (ptr, size);
Z __free_hook = tr_freehook;
Z __malloc_hook = tr_mallochook;
Z __realloc_hook = tr_reallochook;
Z if (hdr == NULL)
Z /* Failed realloc. */
Z fprintf (mallstream, "! %p %x\n", ptr, size);
Z else
Z fprintf (mallstream, "< %p\n> %p %x\n", ptr, hdr, size);
Z
Z if (hdr == mallwatch)
Z tr_break ();
Z
Z return hdr;
Z}
Z
Z/* We enable tracing if either the environment variable MALLOC_TRACE
Z is set, or if the variable mallwatch has been patched to an address
Z that the debugging user wants us to stop on. When patching mallwatch,
Z don't forget to set a breakpoint on tr_break! */
Z
Zvoid
ZDEFUN_VOID(mtrace)
Z{
Z char *mallfile;
Z
Z mallfile = getenv (mallenv);
Z if (mallfile != NULL || mallwatch != NULL)
Z {
Z mallstream = fopen (mallfile != NULL ? mallfile : "/dev/null", "w");
Z if (mallstream != NULL)
Z {
Z /* Be sure it doesn't malloc its buffer! */
Z setbuf (mallstream, mallbuf);
Z fprintf (mallstream, "= Start\n");
Z old_free_hook = __free_hook;
Z __free_hook = tr_freehook;
Z old_malloc_hook = __malloc_hook;
Z __malloc_hook = tr_mallochook;
Z old_realloc_hook = __realloc_hook;
Z __realloc_hook = tr_reallochook;
Z }
Z }
Z}
STUNKYFLUFF
set `sum mtrace.c`
if test 38600 != $1
then
echo mtrace.c: Checksum error. Is: $1, should be: 38600.
fi
#
#
echo Extracting realloc.c:
sed 's/^Z//' >realloc.c <<\STUNKYFLUFF
Z/* Change the size of a block allocated by `malloc'.
Z Copyright 1990, 1991 Free Software Foundation
Z Written May 1989 by Mike Haertel.
Z
ZThe GNU C Library is free software; you can redistribute it and/or
Zmodify it under the terms of the GNU Library General Public License as
Zpublished by the Free Software Foundation; either version 2 of the
ZLicense, or (at your option) any later version.
Z
ZThe GNU C Library is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ZLibrary General Public License for more details.
Z
ZYou should have received a copy of the GNU Library General Public
ZLicense along with the GNU C Library; see the file COPYING.LIB. If
Znot, write to the Free Software Foundation, Inc., 675 Mass Ave,
ZCambridge, MA 02139, USA.
Z
Z The author may be reached (Email) at the address mike@ai.mit.edu,
Z or (US mail) as Mike Haertel c/o Free Software Foundation. */
Z
Z/* IGNORE(@ */
Z#include <ansidecl.h>
Z#include <stdlib.h>
Z/* @) */
Z
Z#if defined(__GNU_LIBRARY__) || defined(STDC_HEADERS) || defined(USG)
Z#include <string.h>
Z#else
Z#define memcpy(d, s, n) bcopy((s), (d), (n))
Z#endif
Z
Z#define _MALLOC_INTERNAL
Z#include <malloc.h>
Z
Z#define MIN(A, B) ((A) < (B) ? (A) : (B))
Z
Z/* Debugging hook for realloc. */
ZPTR EXFUN((*__realloc_hook), (PTR __ptr, size_t __size));
Z
Z/* Resize the given region to the new size, returning a pointer
Z to the (possibly moved) region. This is optimized for speed;
Z some benchmarks seem to indicate that greater compactness is
Z achieved by unconditionally allocating and copying to a
Z new region. This module has incestuous knowledge of the
Z internals of both free and malloc. */
ZPTR
ZDEFUN(realloc, (ptr, size), PTR ptr AND size_t size)
Z{
Z PTR result;
Z int type;
Z size_t block, blocks, oldlimit;
Z
Z if (size == 0)
Z {
Z free(ptr);
Z return malloc(0);
Z }
Z else if (ptr == NULL)
Z return malloc(size);
Z
Z if (__realloc_hook != NULL)
Z return (*__realloc_hook)(ptr, size);
Z
Z block = BLOCK(ptr);
Z
Z type = _heapinfo[block].busy.type;
Z switch (type)
Z {
Z case 0:
Z /* Maybe reallocate a large block to a small fragment. */
Z if (size <= BLOCKSIZE / 2)
Z {
Z result = malloc(size);
Z if (result != NULL)
Z {
Z memcpy(result, ptr, size);
Z free(ptr);
Z return result;
Z }
Z }
Z
Z /* The new size is a large allocation as well;
Z see if we can hold it in place. */
Z blocks = BLOCKIFY(size);
Z if (blocks < _heapinfo[block].busy.info.size)
Z {
Z /* The new size is smaller; return
Z excess memory to the free list. */
Z _heapinfo[block + blocks].busy.type = 0;
Z _heapinfo[block + blocks].busy.info.size
Z = _heapinfo[block].busy.info.size - blocks;
Z _heapinfo[block].busy.info.size = blocks;
Z free(ADDRESS(block + blocks));
Z result = ptr;
Z }
Z else if (blocks == _heapinfo[block].busy.info.size)
Z /* No size change necessary. */
Z result = ptr;
Z else
Z {
Z /* Won't fit, so allocate a new region that will.
Z Free the old region first in case there is sufficient
Z adjacent free space to grow without moving. */
Z blocks = _heapinfo[block].busy.info.size;
Z /* Prevent free from actually returning memory to the system. */
Z oldlimit = _heaplimit;
Z _heaplimit = 0;
Z free(ptr);
Z _heaplimit = oldlimit;
Z result = malloc(size);
Z if (result == NULL)
Z {
Z (void) malloc(blocks * BLOCKSIZE);
Z return NULL;
Z }
Z if (ptr != result)
Z memmove(result, ptr, blocks * BLOCKSIZE);
Z }
Z break;
Z
Z default:
Z /* Old size is a fragment; type is logarithm
Z to base two of the fragment size. */
Z if (size > (size_t) (1 << (type - 1)) && size <= (size_t) (1 << type))
Z /* The new size is the same kind of fragment. */
Z result = ptr;
Z else
Z {
Z /* The new size is different; allocate a new space,
Z and copy the lesser of the new size and the old. */
Z result = malloc(size);
Z if (result == NULL)
Z return NULL;
Z memcpy(result, ptr, MIN(size, (size_t) 1 << type));
Z free(ptr);
Z }
Z break;
Z }
Z
Z return result;
Z}
STUNKYFLUFF
set `sum realloc.c`
if test 3391 != $1
then
echo realloc.c: Checksum error. Is: $1, should be: 3391.
fi
#
#
echo Extracting valloc.c:
sed 's/^Z//' >valloc.c <<\STUNKYFLUFF
Z/* Allocate memory on a page boundary.
Z Copyright (C) 1991 Free Software Foundation, Inc.
Z
ZThe GNU C Library is free software; you can redistribute it and/or
Zmodify it under the terms of the GNU Library General Public License as
Zpublished by the Free Software Foundation; either version 2 of the
ZLicense, or (at your option) any later version.
Z
ZThe GNU C Library is distributed in the hope that it will be useful,
Zbut WITHOUT ANY WARRANTY; without even the implied warranty of
ZMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ZLibrary General Public License for more details.
Z
ZYou should have received a copy of the GNU Library General Public
ZLicense along with the GNU C Library; see the file COPYING.LIB. If
Znot, write to the Free Software Foundation, Inc., 675 Mass Ave,
ZCambridge, MA 02139, USA. */
Z
Z/* IGNORE(@ */
Z#include <ansidecl.h>
Z#include <stdlib.h>
Z/* @) */
Z
Z#include <malloc.h>
Z
Z#ifdef __GNU_LIBRARY__
Zextern size_t EXFUN(__getpagesize, (NOARGS));
Z#else
Z#ifndef USG
Zextern size_t EXFUN(getpagesize, (NOARGS));
Z#define __getpagesize() getpagesize()
Z#else
Z#include <sys/param.h>
Z#ifdef EXEC_PAGESIZE
Z#define __getpagesize() EXEC_PAGESIZE
Z#else /* No EXEC_PAGESIZE. */
Z#ifdef NBPG
Z#ifndef CLSIZE
Z#define CLSIZE 1
Z#endif /* No CLSIZE. */
Z#define __getpagesize() (NBPG * CLSIZE)
Z#else /* No NBPG. */
Z#define __getpagesize() NBPC
Z#endif /* NBPG. */
Z#endif /* EXEC_PAGESIZE. */
Z#endif /* USG. */
Z#endif
Z
Zstatic size_t pagesize;
Z
ZPTR
ZDEFUN(valloc, (size), size_t size)
Z{
Z if (pagesize == 0)
Z pagesize = __getpagesize();
Z
Z return memalign (pagesize, size);
Z}
STUNKYFLUFF
set `sum valloc.c`
if test 63930 != $1
then
echo valloc.c: Checksum error. Is: $1, should be: 63930.
fi
echo ALL DONE BUNKY!
exit 0
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