xref: /illumos-gate/usr/src/contrib/ast/src/lib/libast/vmalloc/vmhdr.h (revision b30d193948be5a7794d7ae3ba0ed9c2f72c88e0f)
1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2012 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                 Eclipse Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *          http://www.eclipse.org/org/documents/epl-v10.html           *
11 *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *                 Glenn Fowler <gsf@research.att.com>                  *
18 *                  David Korn <dgk@research.att.com>                   *
19 *                   Phong Vo <kpv@research.att.com>                    *
20 *                                                                      *
21 ***********************************************************************/
22 #ifndef _VMHDR_H
23 #define _VMHDR_H	1
24 #ifndef _BLD_vmalloc
25 #define _BLD_vmalloc	1
26 #endif
27 
28 /*	Common types, and macros for vmalloc functions.
29 **
30 **	Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
31 */
32 
33 #ifndef __STD_C	/* this is normally in vmalloc.h but it's included late here */
34 #ifdef __STDC__
35 #define	__STD_C		1
36 #else
37 #if __cplusplus || c_plusplus
38 #define __STD_C		1
39 #else
40 #define __STD_C		0
41 #endif /*__cplusplus*/
42 #endif /*__STDC__*/
43 #endif /*__STD_C*/
44 
45 #if _PACKAGE_ast
46 
47 #if !_UWIN
48 #define getpagesize		______getpagesize
49 #define _npt_getpagesize	1
50 #define brk			______brk
51 #define sbrk			______sbrk
52 #define _npt_sbrk		1
53 #endif
54 
55 #include	<ast.h>
56 
57 #if _npt_getpagesize
58 #undef				getpagesize
59 #endif
60 #if _npt_sbrk
61 #undef				brk
62 #undef				sbrk
63 #endif
64 
65 #else
66 
67 #include	<ast_common.h>
68 
69 #if !_UWIN
70 #define _npt_getpagesize	1
71 #define _npt_sbrk		1
72 #endif
73 
74 #undef free
75 #undef malloc
76 #undef realloc
77 
78 #endif /*_PACKAGE_ast*/
79 
80 #include	"FEATURE/vmalloc"
81 
82 #include	<aso.h>		/* atomic scalor operations		*/
83 #include	<setjmp.h>	/* use the type jmp_buf for alignment	*/
84 
85 /* extra information needed about methods to get memory from the system */
86 #if defined(_WIN32)
87 #define _mem_win32	1	/* use the VirtualAlloc interface	*/
88 #endif
89 #if !_mem_win32 && !_mem_sbrk && !_mem_mmap_anon && !_mem_mmap_zero
90 #undef _std_malloc
91 #define _std_malloc	1	/* use native malloc/free/realloc	*/
92 #endif
93 
94 typedef unsigned char	Vmuchar_t;
95 typedef unsigned long	Vmulong_t;
96 
97 typedef union _head_u	Head_t;
98 typedef union _body_u	Body_t;
99 typedef struct _block_s	Block_t;
100 typedef struct _seg_s	Seg_t;
101 typedef struct _pfobj_s	Pfobj_t;
102 
103 #define NIL(t)		((t)0)
104 #define reg		register
105 #if __STD_C
106 #define NOTUSED(x)	(void)(x)
107 #else
108 #define NOTUSED(x)	(&x,1)
109 #endif
110 
111 
112 /* convert an address to an integral value */
113 #define VLONG(addr)	((Vmulong_t)((Vmuchar_t*)((Vmulong_t)addr) - (Vmuchar_t*)0) )
114 
115 /* Round x up to a multiple of y. ROUND2 does powers-of-2 and ROUNDX does others */
116 #define ROUND2(x,y)	(((x) + ((y)-1)) & ~((y)-1))
117 #define ROUNDX(x,y)	((((x) + ((y)-1)) / (y)) * (y))
118 #define ROUND(x,y)	(((y)&((y)-1)) ? ROUNDX((x),(y)) : ROUND2((x),(y)) )
119 
120 /* compute a value that is a common multiple of x and y */
121 #define MULTIPLE(x,y)	((x)%(y) == 0 ? (x) : (y)%(x) == 0 ? (y) : (y)*(x))
122 
123 #define VM_abort	0x0001	/* abort() on assertion failure		*/
124 #define VM_break	0x0002	/* try sbrk() block allocator first	*/
125 #define VM_check	0x0004	/* enable detailed checks		*/
126 #define VM_free		0x0008	/* disable addfreelist()		*/
127 #define VM_keep		0x0010	/* disable free()			*/
128 #define VM_mmap		0x0020	/* try mmap() block allocator first	*/
129 
130 #if _UWIN
131 #include <ast_windows.h>
132 #endif
133 
134 #ifndef DEBUG
135 #ifdef _BLD_DEBUG
136 #define DEBUG		1
137 #endif /*_BLD_DEBUG*/
138 #endif /*DEBUG*/
139 #if DEBUG
140 extern void		_vmmessage _ARG_((const char*, long, const char*, long));
141 #define MESSAGE(s)	_vmmessage(__FILE__,__LINE__,s,0)
142 #define ABORT()		(_Vmassert & VM_abort)
143 #define CHECK()		(_Vmassert & VM_check)
144 #define ASSERT(p)	((p) ? 0 : (MESSAGE("Assertion failed"), ABORT() ? (abort(),0) : 0))
145 #define COUNT(n)	((n) += 1)
146 #else
147 #define ABORT()		(0)
148 #define ASSERT(p)
149 #define CHECK()		(0)
150 #define COUNT(n)
151 #define MESSAGE(s)	(0)
152 #endif /*DEBUG*/
153 
154 #define VMPAGESIZE	8192
155 #if _lib_getpagesize
156 #define GETPAGESIZE(x)	((x) ? (x) : ((x)=getpagesize()) )
157 #else
158 #define GETPAGESIZE(x)	((x) = VMPAGESIZE)
159 #endif
160 
161 /* Blocks are allocated such that their sizes are 0%(BITS+1)
162 ** This frees up enough low order bits to store state information
163 */
164 #define BUSY		(01)	/* block is busy				*/
165 #define PFREE		(02)	/* preceding block is free			*/
166 #define JUNK		(04)	/* marked as freed but not yet processed	*/
167 #define BITS		(07)	/* (BUSY|PFREE|JUNK)				*/
168 #define ALIGNB		(8)	/* size must be a multiple of BITS+1		*/
169 
170 #define ISBITS(w)	((w) & BITS)
171 #define CLRBITS(w)	((w) &= ~BITS)
172 #define CPYBITS(w,f)	((w) |= ((f)&BITS) )
173 
174 #define ISBUSY(w)	((w) & BUSY)
175 #define SETBUSY(w)	((w) |= BUSY)
176 #define CLRBUSY(w)	((w) &= ~BUSY)
177 
178 #define ISPFREE(w)	((w) & PFREE)
179 #define SETPFREE(w)	((w) |= PFREE)
180 #define CLRPFREE(w)	((w) &= ~PFREE)
181 
182 #define ISJUNK(w)	((w) & JUNK)
183 #define SETJUNK(w)	((w) |= JUNK)
184 #define CLRJUNK(w)	((w) &= ~JUNK)
185 
186 #define OFFSET(t,e)	((size_t)(&(((t*)0)->e)) )
187 
188 #define VMETHOD(vd)	((vd)->mode&VM_METHODS)
189 
190 /* lock and unlock regions during concurrent accesses */
191 #define SETLOCK(vm,l)	((l) ? 0 : _vmlock((vm), 1) )
192 #define CLRLOCK(vm,l)	((l) ? 0 : _vmlock((vm), 0) )
193 
194 /* local calls */
195 #define KPVALLOC(vm,sz,func)		(func((vm),(sz),1) )
196 #define KPVRESIZE(vm,dt,sz,mv,func)	(func((vm),(dt),(sz),(mv),1) )
197 #define KPVFREE(vm,dt,func)		(func((vm),(dt),1) )
198 #define KPVADDR(vm,addr,func)		(func((vm),(addr),1) )
199 #define KPVSIZE(vm,addr,func)		(func((vm),(addr),1) )
200 #define KPVCOMPACT(vm,func)		(func((vm),1) )
201 #define KPVALIGN(vm,sz,al,func)		(func((vm),(sz),(al),1) )
202 
203 /* ALIGN is chosen so that a block can store all primitive types.
204 ** It should also be a multiple of ALIGNB==(BITS+1) so the size field
205 ** of Block_t will always be 0%(BITS+1) as noted above.
206 ** Of paramount importance is the ALIGNA macro below. If the local compile
207 ** environment is strange enough that the below method does not calculate
208 ** ALIGNA right, then the code below should be commented out and ALIGNA
209 ** redefined to the appropriate requirement.
210 */
211 union _align_u
212 {	char		c, *cp;
213 	int		i, *ip;
214 	long		l, *lp;
215 	double		d, *dp, ***dppp[8];
216 	size_t		s, *sp;
217 	void(*		fn)();
218 	union _align_u*	align;
219 	Head_t*		head;
220 	Body_t*		body;
221 	Block_t*	block;
222 	Vmuchar_t	a[ALIGNB];
223 	_ast_fltmax_t	ld, *ldp;
224 	jmp_buf		jmp;
225 };
226 struct _a_s
227 {	char		c;
228 	union _align_u	a;
229 };
230 #define ALIGNA	(sizeof(struct _a_s) - sizeof(union _align_u))
231 struct _align_s
232 {	char	data[MULTIPLE(ALIGNA,ALIGNB)];
233 };
234 #undef	ALIGN	/* bsd sys/param.h defines this */
235 #define ALIGN	sizeof(struct _align_s)
236 
237 /* make sure that the head of a block is a multiple of ALIGN */
238 struct _head_s
239 {	union
240 	{ Seg_t*	seg;	/* the containing segment	*/
241 	  Block_t*	link;	/* possible link list usage	*/
242 	  Pfobj_t*	pf;	/* profile structure pointer	*/
243 	  char*		file;	/* for file name in Vmdebug	*/
244 	} seg;
245 	union
246 	{ size_t	size;	/* size of data area in bytes	*/
247 	  Block_t*	link;	/* possible link list usage	*/
248 	  int		line;	/* for line number in Vmdebug	*/
249 	} size;
250 };
251 #define HEADSIZE	ROUND(sizeof(struct _head_s),ALIGN)
252 union _head_u
253 {	Vmuchar_t	data[HEADSIZE];	/* to standardize size		*/
254 	struct _head_s	head;
255 };
256 
257 /* now make sure that the body of a block is a multiple of ALIGN */
258 struct _body_s
259 {	Block_t*	link;	/* next in link list		*/
260 	Block_t*	left;	/* left child in free tree	*/
261 	Block_t*	right;	/* right child in free tree	*/
262 	Block_t**	self;	/* self pointer when free	*/
263 };
264 #define BODYSIZE	ROUND(sizeof(struct _body_s),ALIGN)
265 
266 union _body_u
267 {	Vmuchar_t	data[BODYSIZE];	/* to standardize size		*/
268 	struct _body_s	body;
269 	Block_t*	self[1];
270 };
271 
272 /* After all the songs and dances, we should now have:
273 **	sizeof(Head_t)%ALIGN == 0
274 **	sizeof(Body_t)%ALIGN == 0
275 ** and	sizeof(Block_t) = sizeof(Head_t)+sizeof(Body_t)
276 */
277 struct _block_s
278 {	Head_t	head;
279 	Body_t	body;
280 };
281 
282 /* requirements for smallest block type */
283 struct _tiny_s
284 {	Block_t*	link;
285 	Block_t*	self;
286 };
287 #define TINYSIZE	ROUND(sizeof(struct _tiny_s),ALIGN)
288 #define S_TINY		1				/* # of tiny blocks	*/
289 #define MAXTINY		(S_TINY*ALIGN + TINYSIZE)
290 #define TLEFT(b)	((b)->head.head.seg.link)	/* instead of LEFT	*/
291 #define TINIEST(b)	(SIZE(b) == TINYSIZE)		/* this type uses TLEFT	*/
292 
293 #define DIV(x,y)	((y) == 8 ? ((x)>>3) : (x)/(y) )
294 #define INDEX(s)	DIV((s)-TINYSIZE,ALIGN)
295 
296 /* small block types kept in separate caches for quick allocation */
297 #define S_CACHE		6	/* # of types of small blocks to be cached	*/
298 #define N_CACHE		32	/* on allocation, create this many at a time	*/
299 #define MAXCACHE	(S_CACHE*ALIGN + TINYSIZE)
300 #define C_INDEX(s)	(s < MAXCACHE ? INDEX(s) : S_CACHE)
301 
302 #define TINY(vd)	((vd)->tiny)
303 #define CACHE(vd)	((vd)->cache)
304 
305 struct _vmdata_s /* core region data - could be in shared/persistent memory	*/
306 {	unsigned int	lock;		/* lock status				*/
307 	int		mode;		/* current mode for region		*/
308 	size_t		incr;		/* allocate in multiple of this		*/
309 	size_t		pool;		/* size	of an elt in a Vmpool region	*/
310 	Seg_t*		seg;		/* list of segments			*/
311 	Block_t*	free;		/* most recent free block		*/
312 	Block_t*	wild;		/* wilderness block			*/
313 	Block_t*	root;		/* root of free tree			*/
314 	Block_t*	tiny[S_TINY];	/* small blocks				*/
315 	Block_t*	cache[S_CACHE+1]; /* delayed free blocks		*/
316 };
317 
318 #include	"vmalloc.h"
319 
320 #if !_PACKAGE_ast
321 /* we don't use these here and they interfere with some local names */
322 #undef malloc
323 #undef free
324 #undef realloc
325 #endif
326 
327 /* segment structure */
328 struct _seg_s
329 {	Vmdata_t*	vmdt;	/* the data region holding this	*/
330 	Seg_t*		next;	/* next segment			*/
331 	Void_t*		addr;	/* starting segment address	*/
332 	size_t		extent;	/* extent of segment		*/
333 	Vmuchar_t*	baddr;	/* bottom of usable memory	*/
334 	size_t		size;	/* allocable size		*/
335 	Block_t*	free;	/* recent free blocks		*/
336 	Block_t*	last;	/* Vmlast last-allocated block	*/
337 };
338 
339 /* starting block of a segment */
340 #define SEGBLOCK(s)	((Block_t*)(((Vmuchar_t*)(s)) + ROUND(sizeof(Seg_t),ALIGN)))
341 
342 /* short-hands for block data */
343 #define SEG(b)		((b)->head.head.seg.seg)
344 #define SEGLINK(b)	((b)->head.head.seg.link)
345 #define	SIZE(b)		((b)->head.head.size.size)
346 #define SIZELINK(b)	((b)->head.head.size.link)
347 #define LINK(b)		((b)->body.body.link)
348 #define LEFT(b)		((b)->body.body.left)
349 #define RIGHT(b)	((b)->body.body.right)
350 
351 #define DATA(b)		((Void_t*)((b)->body.data) )
352 #define BLOCK(d)	((Block_t*)((char*)(d) - sizeof(Head_t)) )
353 #define SELF(b)		(b)->body.self[SIZE(b)/sizeof(Block_t*)-1]
354 #define LAST(b)		(*((Block_t**)(((char*)(b)) - sizeof(Block_t*)) ) )
355 #define NEXT(b)		((Block_t*)((b)->body.data + SIZE(b)) )
356 
357 /* functions to manipulate link lists of elts of the same size */
358 #define SETLINK(b)	(RIGHT(b) =  (b) )
359 #define ISLINK(b)	(RIGHT(b) == (b) )
360 #define UNLINK(vd,b,i,t) \
361 		((((t) = LINK(b)) ? (LEFT(t) = LEFT(b)) : NIL(Block_t*) ), \
362 		 (((t) = LEFT(b)) ? (LINK(t) = LINK(b)) : (TINY(vd)[i] = LINK(b)) ) )
363 
364 /* delete a block from a link list or the free tree.
365 ** The test in the below macro is worth scratching your head a bit.
366 ** Even though tiny blocks (size < BODYSIZE) are kept in separate lists,
367 ** only the TINIEST ones require TLEFT(b) for the back link. Since this
368 ** destroys the SEG(b) pointer, it must be carefully restored in bestsearch().
369 ** Other tiny blocks have enough space to use the usual LEFT(b).
370 ** In this case, I have also carefully arranged so that RIGHT(b) and
371 ** SELF(b) can be overlapped and the test ISLINK() will go through.
372 */
373 #define REMOVE(vd,b,i,t,func) \
374 		((!TINIEST(b) && ISLINK(b)) ? UNLINK((vd),(b),(i),(t)) : \
375 	 		func((vd),SIZE(b),(b)) )
376 
377 /* see if a block is the wilderness block */
378 #define SEGWILD(b)	(((b)->body.data+SIZE(b)+sizeof(Head_t)) >= SEG(b)->baddr)
379 #define VMWILD(vd,b)	(((b)->body.data+SIZE(b)+sizeof(Head_t)) >= vd->seg->baddr)
380 
381 #define VMFLF(vm,fi,ln,fn)	((fi) = (vm)->file, (vm)->file = NIL(char*), \
382 		 		 (ln) = (vm)->line, (vm)->line = 0 , \
383 		 		 (fn) = (vm)->func, (vm)->func = NIL(Void_t*) )
384 
385 /* The lay-out of a Vmprofile block is this:
386 **	seg_ size ----data---- _pf_ size
387 **	_________ ____________ _________
388 **	seg_, size: header required by Vmbest.
389 **	data:	actual data block.
390 **	_pf_:	pointer to the corresponding Pfobj_t struct
391 **	size:	the true size of the block.
392 ** So each block requires an extra Head_t.
393 */
394 #define PF_EXTRA   sizeof(Head_t)
395 #define PFDATA(d)  ((Head_t*)((Vmuchar_t*)(d)+(SIZE(BLOCK(d))&~BITS)-sizeof(Head_t)) )
396 #define PFOBJ(d)   (PFDATA(d)->head.seg.pf)
397 #define PFSIZE(d)  (PFDATA(d)->head.size.size)
398 
399 /* The lay-out of a block allocated by Vmdebug is this:
400 **	seg_ size file size seg_ magi ----data---- --magi-- magi line
401 **	--------- --------- --------- ------------ -------- ---------
402 **	seg_,size: header required by Vmbest management.
403 **	file:	the file where it was created.
404 **	size:	the true byte count of the block
405 **	seg_:	should be the same as the previous seg_.
406 **		This allows the function vmregion() to work.
407 **	magi:	magic bytes to detect overwrites.
408 **	data:	the actual data block.
409 **	magi:	more magic bytes.
410 **	line:	the line number in the file where it was created.
411 ** So for each allocated block, we'll need 3 extra Head_t.
412 */
413 
414 /* convenient macros for accessing the above fields */
415 #define DB_HEAD		(2*sizeof(Head_t))
416 #define DB_TAIL		(2*sizeof(Head_t))
417 #define DB_EXTRA	(DB_HEAD+DB_TAIL)
418 #define DBBLOCK(d)	((Block_t*)((Vmuchar_t*)(d) - 3*sizeof(Head_t)) )
419 #define DBBSIZE(d)	(SIZE(DBBLOCK(d)) & ~BITS)
420 #define DBSEG(d)	(((Head_t*)((Vmuchar_t*)(d) - sizeof(Head_t)))->head.seg.seg )
421 #define DBSIZE(d)	(((Head_t*)((Vmuchar_t*)(d) - 2*sizeof(Head_t)))->head.size.size )
422 #define DBFILE(d)	(((Head_t*)((Vmuchar_t*)(d) - 2*sizeof(Head_t)))->head.seg.file )
423 #define DBLN(d)		(((Head_t*)((Vmuchar_t*)DBBLOCK(d)+DBBSIZE(d)))->head.size.line )
424 #define DBLINE(d)	(DBLN(d) < 0 ? -DBLN(d) : DBLN(d))
425 
426 /* forward/backward translation for addresses between Vmbest and Vmdebug */
427 #define DB2BEST(d)	((Vmuchar_t*)(d) - 2*sizeof(Head_t))
428 #define DB2DEBUG(b)	((Vmuchar_t*)(b) + 2*sizeof(Head_t))
429 
430 /* set file and line number, note that DBLN > 0 so that DBISBAD will work  */
431 #define DBSETFL(d,f,l)	(DBFILE(d) = (f), DBLN(d) = (f) ? (l) : 1)
432 
433 /* set and test the state of known to be corrupted */
434 #define DBSETBAD(d)	(DBLN(d) > 0 ? (DBLN(d) = -DBLN(d)) : -1)
435 #define DBISBAD(d)	(DBLN(d) <= 0)
436 
437 #define DB_MAGIC	0255		/* 10101101	*/
438 
439 /* compute the bounds of the magic areas */
440 #define DBHEAD(d,begp,endp) \
441 		(((begp) = (Vmuchar_t*)(&DBSEG(d)) + sizeof(Seg_t*)), ((endp) = (d)) )
442 #define DBTAIL(d,begp,endp) \
443 		(((begp) = (Vmuchar_t*)(d)+DBSIZE(d)), ((endp) = (Vmuchar_t*)(&DBLN(d))) )
444 
445 
446 /* external symbols for use inside vmalloc only */
447 typedef Block_t*	(*Vmsearch_f)_ARG_((Vmdata_t*, size_t, Block_t*));
448 typedef struct _vmextern_s
449 {	Block_t*	(*vm_extend)_ARG_((Vmalloc_t*, size_t, Vmsearch_f ));
450 	ssize_t		(*vm_truncate)_ARG_((Vmalloc_t*, Seg_t*, size_t, int));
451 	size_t		vm_pagesize;
452 	char*		(*vm_strcpy)_ARG_((char*, const char*, int));
453 	char*		(*vm_itoa)_ARG_((Vmulong_t, int));
454 	void		(*vm_trace)_ARG_((Vmalloc_t*,
455 					  Vmuchar_t*, Vmuchar_t*, size_t, size_t));
456 	void		(*vm_pfclose)_ARG_((Vmalloc_t*));
457 	unsigned int	vm_lock;
458 	int		vm_assert;
459 	int		vm_options;
460 } Vmextern_t;
461 
462 #define _Vmextend	(_Vmextern.vm_extend)
463 #define _Vmtruncate	(_Vmextern.vm_truncate)
464 #define _Vmpagesize	(_Vmextern.vm_pagesize)
465 #define _Vmstrcpy	(_Vmextern.vm_strcpy)
466 #define _Vmitoa		(_Vmextern.vm_itoa)
467 #define _Vmtrace	(_Vmextern.vm_trace)
468 #define _Vmpfclose	(_Vmextern.vm_pfclose)
469 #define _Vmlock		(_Vmextern.vm_lock)
470 #define _Vmassert	(_Vmextern.vm_assert)
471 #define _Vmoptions	(_Vmextern.vm_options)
472 
473 #define VMOPTIONS()     do { if (!_Vmoptions) { _vmoptions(); } } while (0)
474 
475 extern int		_vmbestcheck _ARG_((Vmdata_t*, Block_t*));
476 extern int		_vmfd _ARG_((int));
477 extern int		_vmlock _ARG_((Vmalloc_t*, int));
478 extern void		_vmoptions _ARG_((void));
479 
480 _BEGIN_EXTERNS_
481 
482 extern Vmextern_t	_Vmextern;
483 
484 #if _PACKAGE_ast
485 
486 #if _npt_getpagesize
487 extern int		getpagesize _ARG_((void));
488 #endif
489 #if _npt_sbrk
490 extern int		brk _ARG_(( void* ));
491 extern Void_t*		sbrk _ARG_(( ssize_t ));
492 #endif
493 
494 #else
495 
496 #if _hdr_unistd
497 #include	<unistd.h>
498 #else
499 extern void		abort _ARG_(( void ));
500 extern ssize_t		write _ARG_(( int, const void*, size_t ));
501 extern int		getpagesize _ARG_((void));
502 extern Void_t*		sbrk _ARG_((ssize_t));
503 #endif
504 
505 #if !__STDC__ && !_hdr_stdlib
506 extern size_t		strlen _ARG_(( const char* ));
507 extern char*		strcpy _ARG_(( char*, const char* ));
508 extern int		strcmp _ARG_(( const char*, const char* ));
509 extern int		atexit _ARG_(( void(*)(void) ));
510 extern char*		getenv _ARG_(( const char* ));
511 extern Void_t*		memcpy _ARG_(( Void_t*, const Void_t*, size_t ));
512 extern Void_t*		memset _ARG_(( Void_t*, int, size_t ));
513 #else
514 #include	<stdlib.h>
515 #include	<string.h>
516 #endif
517 
518 /* for vmexit.c */
519 extern int		onexit _ARG_(( void(*)(void) ));
520 extern void		_exit _ARG_(( int ));
521 extern void		_cleanup _ARG_(( void ));
522 
523 #endif /*_PACKAGE_ast*/
524 
525 /* for vmdcsbrk.c */
526 #if !_typ_ssize_t
527 typedef int		ssize_t;
528 #endif
529 
530 _END_EXTERNS_
531 
532 #endif /* _VMHDR_H */
533