Johns release

1 files changed, 1116 insertions, 0 deletions

diff --git a/gdb/gmalloc.c b/gdb/gmalloc.c
new file mode 100755
index 0000000..0468551
--- /dev/null
+++ b/gdb/gmalloc.c
@@ -0,0 +1,1116 @@
+
+/* gmalloc.c - THIS FILE IS AUTOMAGICALLY GENERATED SO DON'T EDIT IT. */
+
+/* Single-file skeleton for GNU malloc.
+   Copyright 1989 Free Software Foundation
+		  Written May 1989 by Mike Haertel.
+
+   This program 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 1, or (at your option)
+   any later version.
+
+   This program 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 this program; 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. */
+
+#define __ONEFILE
+
+/* DO NOT DELETE THIS LINE -- ansidecl.h INSERTED HERE. */
+/* Copyright (C) 1989 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 1, 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.  */
+
+/* ANSI and traditional C compatibility macros
+
+   ANSI C is assumed if __STDC__ is #defined.
+
+	Macros
+		PTR		- Generic pointer type
+		LONG_DOUBLE	- `long double' type
+		CONST		- `const' keyword
+		VOLATILE	- `volatile' keyword
+		SIGNED		- `signed' keyword
+		PTRCONST	- Generic const pointer (void *const)
+
+	EXFUN(name, prototype)		- declare external function NAME
+					  with prototype PROTOTYPE
+	DEFUN(name, arglist, args)	- define function NAME with
+					  args ARGLIST of types in ARGS
+	DEFUN_VOID(name)		- define function NAME with no args
+	AND				- argument separator for ARGS
+	NOARGS				- null arglist
+	DOTS				- `...' in args
+
+    For example:
+	extern int EXFUN(printf, (CONST char *format DOTS));
+	int DEFUN(fprintf, (stream, format),
+		  FILE *stream AND CONST char *format DOTS) { ... }
+	void DEFUN_VOID(abort) { ... }
+*/
+
+#ifndef	_ANSIDECL_H
+
+#define	_ANSIDECL_H	1
+
+
+/* Every source file includes this file,
+   so they will all get the switch for lint.  */
+/* LINTLIBRARY */
+
+
+#ifdef	__STDC__
+
+#define	PTR		void *
+#define	PTRCONST	void *CONST
+#define	LONG_DOUBLE	long double
+
+#define	AND		,
+#define	NOARGS		void
+#define	CONST		const
+#define	VOLATILE	volatile
+#define	SIGNED		signed
+#define	DOTS		, ...
+
+#define	EXFUN(name, proto)		name proto
+#define	DEFUN(name, arglist, args)	name(args)
+#define	DEFUN_VOID(name)		name(NOARGS)
+
+#else	/* Not ANSI C.  */
+
+#define	PTR		char *
+#define	PTRCONST	PTR
+#define	LONG_DOUBLE	double
+
+#define	AND		;
+#define	NOARGS
+#define	CONST
+#define	VOLATILE
+#define	SIGNED
+#define	DOTS
+
+#define	EXFUN(name, proto)		name()
+#define	DEFUN(name, arglist, args)	name arglist args;
+#define	DEFUN_VOID(name)		name()
+
+#endif	/* ANSI C.  */
+
+
+#endif	/* ansidecl.h	*/
+
+#ifdef __STDC__
+#include <limits.h>
+#else
+/* DO NOT DELETE THIS LINE -- limits.h INSERTED HERE. */
+/* Number of bits in a `char'.  */
+#define CHAR_BIT 8
+
+/* No multibyte characters supported yet.  */
+#define MB_LEN_MAX 1
+
+/* Minimum and maximum values a `signed char' can hold.  */
+#define SCHAR_MIN -128
+#define SCHAR_MAX 127
+
+/* Maximum value an `unsigned char' can hold.  (Minimum is 0).  */
+#define UCHAR_MAX 255U
+
+/* Minimum and maximum values a `char' can hold.  */
+#ifdef __CHAR_UNSIGNED__
+#define CHAR_MIN 0
+#define CHAR_MAX 255U
+#else
+#define CHAR_MIN -128
+#define CHAR_MAX 127
+#endif
+
+/* Minimum and maximum values a `signed short int' can hold.  */
+#define SHRT_MIN -32768
+#define SHRT_MAX 32767
+
+/* Maximum value an `unsigned short int' can hold.  (Minimum is 0).  */
+#define USHRT_MAX 65535U
+
+/* Minimum and maximum values a `signed int' can hold.  */
+#define INT_MIN -2147483648
+#define INT_MAX 2147483647
+
+/* Maximum value an `unsigned int' can hold.  (Minimum is 0).  */
+#define UINT_MAX 4294967295U
+
+/* Minimum and maximum values a `signed long int' can hold.
+   (Same as `int').  */
+#define LONG_MIN (-LONG_MAX-1)
+#define LONG_MAX 2147483647
+
+/* Maximum value an `unsigned long int' can hold.  (Minimum is 0).  */
+#define ULONG_MAX 4294967295U
+#endif
+
+#ifdef __STDC__
+#include <stddef.h>
+#else
+/* DO NOT DELETE THIS LINE -- stddef.h INSERTED HERE. */
+#ifndef _STDDEF_H
+#define _STDDEF_H
+
+/* Signed type of difference of two pointers.  */
+
+typedef long ptrdiff_t;
+
+/* Unsigned type of `sizeof' something.  */
+
+#ifndef _SIZE_T	/* in case <sys/types.h> has defined it. */
+#define _SIZE_T
+typedef unsigned long size_t;
+#endif /* _SIZE_T */
+
+/* A null pointer constant.  */
+
+#undef NULL		/* in case <stdio.h> has defined it. */
+#define NULL 0
+
+/* Offset of member MEMBER in a struct of type TYPE.  */
+
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+
+#endif /* _STDDEF_H */
+#endif
+
+/* DO NOT DELETE THIS LINE -- stdlib.h INSERTED HERE. */
+/* Fake stdlib.h supplying the stuff needed by malloc. */
+
+#ifndef __ONEFILE
+#include <stddef.h>
+#endif
+
+extern void EXFUN(abort, (void));
+extern void EXFUN(free, (PTR));
+extern PTR EXFUN(malloc, (size_t));
+extern PTR EXFUN(realloc, (PTR, size_t));
+
+/* DO NOT DELETE THIS LINE -- string.h INSERTED HERE. */
+/* Fake string.h supplying stuff used by malloc. */
+#ifndef __ONEFILE
+#include <stddef.h>
+#endif
+
+extern PTR EXFUN(memcpy, (PTR, PTR, size_t));
+extern PTR EXFUN(memset, (PTR, int, size_t));
+#define memmove memcpy
+
+#define _MALLOC_INTERNAL
+/* DO NOT DELETE THIS LINE -- malloc.h INSERTED HERE. */
+/* Declarations for `malloc' and friends.
+   Copyright 1990 Free Software Foundation
+		  Written May 1989 by Mike Haertel.
+
+   This program 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 1, or (at your option)
+   any later version.
+
+   This program 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 this program; 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
+
+#ifndef __ONEFILE
+#define	__need_NULL
+#define	__need_size_t
+#define __need_ptrdiff_t
+#include <stddef.h>
+#endif
+
+#ifdef _MALLOC_INTERNAL
+
+#ifndef __ONEFILE
+#include <limits.h>
+#endif
+
+/* 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
+
+/* Where to start searching the free list when looking for new memory.
+   The two possible values are 0 and _heapindex.  Starting at 0 seems
+   to reduce total memory usage, while starting at _heapindex seems to
+   run faster.  */
+#define MALLOC_SEARCH_START	_heapindex
+
+/* Data structure giving per-block information.  */
+typedef union
+  {
+    /* Heap information for a busy block.  */
+    struct
+      {
+	/* Zero for a large block, or positive giving the
+	   logarithm to the base two of the fragment size.  */
+	int type;
+	union
+	  {
+	    struct
+	      {
+		size_t nfree;	/* Free fragments in a fragmented block.  */
+		size_t first;	/* First free fragment of the block.  */
+	      } frag;
+	    /* Size (in blocks) of a large cluster.  */
+	    size_t size;
+	  } info;
+      } busy;
+    /* Heap information for a free block (that may be the first of
+       a free cluster).  */
+    struct
+      {
+	size_t size;		/* Size (in blocks) of a free cluster.  */
+	size_t next;		/* Index of next free cluster.  */
+	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) (((B) - 1) * BLOCKSIZE + _heapbase))
+
+/* Current search index for the heap table.  */
+extern size_t _heapindex;
+
+/* Limit of valid info table indices.  */
+extern 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[];
+
+/* Instrumentation.  */
+extern size_t _chunks_used;
+extern size_t _bytes_used;
+extern size_t _chunks_free;
+extern size_t _bytes_free;
+
+/* Internal version of free() used in morecore(). */
+extern void EXFUN(__free, (PTR __ptr));
+
+#endif  /* _MALLOC_INTERNAL.  */
+
+/* Underlying allocation function; successive calls should
+   return contiguous pieces of memory.  */
+extern PTR EXFUN((*__morecore), (ptrdiff_t __size));
+
+/* Default value of previous.  */
+extern PTR EXFUN(__default_morecore, (ptrdiff_t __size));
+
+/* Flag whether malloc has been called.  */
+extern int __malloc_initialized;
+
+/* Hooks for debugging versions.  */
+extern void EXFUN((*__free_hook), (PTR __ptr));
+extern PTR EXFUN((*__malloc_hook), (size_t __size));
+extern PTR EXFUN((*__realloc_hook), (PTR __ptr, size_t __size));
+
+/* Activate a standard collection of debugging hooks.  */
+extern void EXFUN(mcheck, (void EXFUN((*func), (void))));
+
+/* Statistics available to the user.  */
+struct mstats
+  {
+    size_t bytes_total;		/* Total size of the heap. */
+    size_t chunks_used;		/* Chunks allocated by the user. */
+    size_t bytes_used;		/* Byte total of user-allocated chunks. */
+    size_t chunks_free;		/* Chunks in the free list. */
+    size_t bytes_free;		/* Byte total of chunks in the free list. */
+  };
+
+/* Pick up the current statistics. */
+extern struct mstats EXFUN(mstats, (NOARGS));
+
+#endif /* malloc.h  */
+
+/* DO NOT DELETE THIS LINE -- free.c INSERTED HERE. */
+/* Free a block of memory allocated by `malloc'.
+   Copyright 1990 Free Software Foundation
+		  Written May 1989 by Mike Haertel.
+
+   This program 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 1, or (at your option)
+   any later version.
+
+   This program 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 this program; 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 __ONEFILE
+#include "ansidecl.h"
+#include <stddef.h>
+#include <stdlib.h>
+
+#define _MALLOC_INTERNAL
+#include "malloc.h"
+#endif /* __ONEFILE */
+
+/* Debugging hook for free.  */
+void EXFUN((*__free_hook), (PTR __ptr));
+
+/* Return memory to the heap.  Like free() but don't call a __free_hook
+   if there is one.  */
+void
+DEFUN(__free, (ptr), PTR ptr)
+{
+  int type;
+  size_t block, blocks;
+  register 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 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 < 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 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
+DEFUN(free, (ptr), PTR ptr)
+{
+  if (ptr == NULL)
+    return;
+
+  if (__free_hook != NULL)
+    (*__free_hook)(ptr);
+  else
+    __free (ptr);
+}
+
+/* DO NOT DELETE THIS LINE -- malloc.c INSERTED HERE. */
+/* Memory allocator `malloc'.
+   Copyright 1990 Free Software Foundation
+		  Written May 1989 by Mike Haertel.
+
+   This program 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 1, or (at your option)
+   any later version.
+
+   This program 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 this program; 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 __ONEFILE
+#include "ansidecl.h"
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define _MALLOC_INTERNAL
+#include "malloc.h"
+#endif /* __ONEFILE */
+
+/* How to really get more memory.  */
+PTR EXFUN((*__morecore), (ptrdiff_t __size)) = __default_morecore;
+
+/* Debugging hook for `malloc'.  */
+PTR EXFUN((*__malloc_hook), (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 size_t heapsize;
+
+/* Search index in the info table.  */
+size_t _heapindex;
+
+/* Limit of valid info table indices.  */
+size_t _heaplimit;
+
+/* Free lists for each fragment size.  */
+struct list _fraghead[BLOCKLOG];
+
+/* Instrumentation.  */
+size_t _chunks_used;
+size_t _bytes_used;
+size_t _chunks_free;
+size_t _bytes_free;
+
+/* Are you experienced?  */
+int __malloc_initialized;
+
+/* Aligned allocation.  */
+static PTR
+DEFUN(align, (size), size_t size)
+{
+  PTR result;
+  unsigned int adj;
+
+  result = (*__morecore)(size);
+  adj = (unsigned int) ((char *) result - (char *) NULL) % BLOCKSIZE;
+  if (adj != 0)
+    {
+      adj = BLOCKSIZE - adj;
+      (void) (*__morecore)(adj);
+      result = (char *) result + adj;
+    }
+  return result;
+}
+
+/* Set everything up and remember that we have.  */
+static int
+DEFUN_VOID(initialize)
+{
+  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;
+  __malloc_initialized = 1;
+  return 1;
+}
+
+/* Get neatly aligned memory, initializing or
+   growing the heap info table as necessary. */
+static PTR
+DEFUN(morecore, (size), size_t size)
+{
+  PTR result;
+  malloc_info *newinfo, *oldinfo;
+  size_t newsize;
+
+  result = align(size);
+  if (result == NULL)
+    return NULL;
+
+  /* Check if we need to grow the info table.  */
+  if (BLOCK((char *) result + size) > heapsize)
+    {
+      newsize = heapsize;
+      while (BLOCK((char *) result + size) > newsize)
+	newsize *= 2;
+      newinfo = (malloc_info *) align(newsize * sizeof(malloc_info));
+      if (newinfo == NULL)
+	{
+	  (*__morecore)(- size);
+	  return NULL;
+	}
+      memset(newinfo, 0, newsize * sizeof(malloc_info));
+      memcpy(newinfo, _heapinfo, 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;
+      __free(oldinfo);
+      heapsize = newsize;
+    }
+
+  _heaplimit = BLOCK((char *) result + size);
+  return result;
+}
+
+/* Allocate memory from the heap.  */
+PTR
+DEFUN(malloc, (size), size_t size)
+{
+  PTR result;
+  size_t block, blocks, lastblocks, start;
+  register size_t i;
+  struct list *next;
+
+  if (size == 0)
+    return NULL;
+
+  if (__malloc_hook != NULL)
+    return (*__malloc_hook)(size);
+
+  if (!__malloc_initialized)
+    if (!initialize())
+      return NULL;
+
+  if (size < sizeof(struct list))
+    size = sizeof(struct list);
+
+  /* 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 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) 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 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 < 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);
+	}
+    }
+  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 = MALLOC_SEARCH_START;
+      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)
+		{
+		  _heapinfo[block].free.size = blocks;
+		  _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;
+    }
+
+  return result;
+}
+
+/* DO NOT DELETE THIS LINE -- realloc.c INSERTED HERE. */
+/* Change the size of a block allocated by `malloc'.
+   Copyright 1990 Free Software Foundation
+		  Written May 1989 by Mike Haertel.
+
+   This program 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 1, or (at your option)
+   any later version.
+
+   This program 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 this program; 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 __ONEFILE
+#include "ansidecl.h"
+#include <stdlib.h>
+#include <string.h>
+
+#define _MALLOC_INTERNAL
+#include "malloc.h"
+#endif /* __ONEFILE */
+
+#define MIN(A, B) ((A) < (B) ? (A) : (B))
+
+/* Debugging hook for realloc.  */
+PTR EXFUN((*__realloc_hook), (PTR __ptr, 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
+DEFUN(realloc, (ptr, size), PTR ptr AND size_t size)
+{
+  PTR result;
+  int type;
+  size_t block, blocks, oldlimit;
+
+  if (size == 0)
+    {
+      free(ptr);
+      return NULL;
+    }
+  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(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;
+	  free(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(ptr);
+	  _heaplimit = oldlimit;
+	  result = malloc(size);
+	  if (result == NULL)
+	    {
+	      (void) malloc(blocks * BLOCKSIZE);
+	      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 > 1 << (type - 1) && size <= 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, 1 << type));
+	  free(ptr);
+	}
+      break;
+    }
+
+  return result;
+}
+
+/* DO NOT DELETE THIS LINE -- unix.c INSERTED HERE. */
+/* unix.c - get more memory with a UNIX system call.
+   Copyright 1990 Free Software Foundation
+		  Written May 1989 by Mike Haertel.
+
+   This program 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 1, or (at your option)
+   any later version.
+
+   This program 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 this program; 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 __ONEFILE
+#include "ansidecl.h"
+#include <stddef.h>
+
+#define _MALLOC_INTERNAL
+#include "malloc.h"
+#endif /* __ONEFILE */
+
+extern PTR EXFUN(sbrk, (ptrdiff_t size));
+
+PTR
+DEFUN(__default_morecore, (size), ptrdiff_t size)
+{
+  PTR result;
+
+  result = sbrk(size);
+  if (result == (PTR) -1)
+    return NULL;
+  return result;
+}
+
+#define __getpagesize getpagesize
+/* DO NOT DELETE THIS LINE -- valloc.c INSERTED HERE. */
+/* Allocate memory on a page boundary.
+   Copyright 1990 Free Software Foundation
+		  Written May 1989 by Mike Haertel.
+
+   This program 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 1, or (at your option)
+   any later version.
+
+   This program 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 this program; 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 __ONEFILE
+#include "ansidecl.h"
+#include <stdlib.h>
+#endif /* __ONEFILE */
+
+extern size_t EXFUN(__getpagesize, (NOARGS));
+
+static size_t pagesize;
+
+PTR
+DEFUN(valloc, (size), size_t size)
+{
+  PTR result;
+  unsigned int adj;
+
+  if (pagesize == 0)
+    pagesize = __getpagesize();
+
+  result = malloc(size + pagesize);
+  if (result == NULL)
+    return NULL;
+  adj = (unsigned int) ((char *) result - (char *) NULL) % pagesize;
+  if (adj != 0)
+    result = (char *) result + pagesize - adj;
+  return result;
+}