?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
dmsynth: Remove DECLSPEC_HIDDEN usage.
[wine.git] / dlls / ntdll / heap.c
blobaca8e7181a859aba17078687122d0e4320b2490e
1 /*
2 * Win32 heap functions
3 *
4 * Copyright 1996 Alexandre Julliard
5 * Copyright 1998 Ulrich Weigand
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 */
21
22 #include <assert.h>
23 #include <stdlib.h>
24 #include <stdarg.h>
25 #include <stdio.h>
26 #include <string.h>
27
28 #define RUNNING_ON_VALGRIND 0 /* FIXME */
29
30 #include "ntstatus.h"
31 #define WIN32_NO_STATUS
32 #include "windef.h"
33 #include "winnt.h"
34 #include "winternl.h"
35 #include "ntdll_misc.h"
36 #include "wine/list.h"
37 #include "wine/debug.h"
38
39 WINE_DEFAULT_DEBUG_CHANNEL(heap);
40
41 /* HeapCompatibilityInformation values */
42
43 #define HEAP_STD 0
44 #define HEAP_LAL 1
45 #define HEAP_LFH 2
46
47
48 /* undocumented RtlWalkHeap structure */
49
50 struct rtl_heap_entry
51 {
52 LPVOID lpData;
53 SIZE_T cbData; /* differs from PROCESS_HEAP_ENTRY */
54 BYTE cbOverhead;
55 BYTE iRegionIndex;
56 WORD wFlags; /* value differs from PROCESS_HEAP_ENTRY */
57 union {
58 struct {
59 HANDLE hMem;
60 DWORD dwReserved[3];
61 } Block;
62 struct {
63 DWORD dwCommittedSize;
64 DWORD dwUnCommittedSize;
65 LPVOID lpFirstBlock;
66 LPVOID lpLastBlock;
67 } Region;
68 };
69 };
70
71 /* rtl_heap_entry flags, names made up */
72
73 #define RTL_HEAP_ENTRY_BUSY 0x0001
74 #define RTL_HEAP_ENTRY_REGION 0x0002
75 #define RTL_HEAP_ENTRY_BLOCK 0x0010
76 #define RTL_HEAP_ENTRY_UNCOMMITTED 0x1000
77 #define RTL_HEAP_ENTRY_COMMITTED 0x4000
78 #define RTL_HEAP_ENTRY_LFH 0x8000
79
80
81 /* header for heap blocks */
82
83 #define REGION_ALIGN 0x10000
84 #define BLOCK_ALIGN (2 * sizeof(void *))
85
86 struct DECLSPEC_ALIGN(8) block
87 {
88 /* block size in multiple of BLOCK_ALIGN */
89 WORD block_size;
90 /* unused size (used block) / high size bits (free block) */
91 WORD tail_size;
92 /* offset to region base / first group block (LFH block) */
93 WORD base_offset;
94 BYTE block_type;
95 BYTE block_flags;
96 };
97
98 C_ASSERT( sizeof(struct block) == 8 );
99
100 /* block specific flags */
101
102 #define BLOCK_FLAG_FREE 0x01
103 #define BLOCK_FLAG_PREV_FREE 0x02
104 #define BLOCK_FLAG_FREE_LINK 0x03
105 #define BLOCK_FLAG_LARGE 0x04
106 #define BLOCK_FLAG_LFH 0x08 /* block is handled by the LFH frontend */
107 #define BLOCK_FLAG_USER_INFO 0x10 /* user flags up to 0xf0 */
108 #define BLOCK_FLAG_USER_MASK 0xf0
109
110 #define BLOCK_USER_FLAGS( heap_flags ) (((heap_flags) >> 4) & BLOCK_FLAG_USER_MASK)
111 #define HEAP_USER_FLAGS( block_flags ) (((block_flags) & BLOCK_FLAG_USER_MASK) << 4)
112
113 /* entry to link free blocks in free lists */
114
115 struct DECLSPEC_ALIGN(BLOCK_ALIGN) entry
116 {
117 struct block block;
118 struct list entry;
119 };
120
121 C_ASSERT( sizeof(struct entry) == 2 * BLOCK_ALIGN );
122
123 typedef struct
124 {
125 SIZE_T __pad[sizeof(SIZE_T) / sizeof(DWORD)];
126 struct list entry; /* entry in heap large blocks list */
127 SIZE_T data_size; /* size of user data */
128 SIZE_T block_size; /* total size of virtual memory block */
129 void *user_value;
130 struct block block;
131 } ARENA_LARGE;
132
133 /* block must be last and aligned */
134 C_ASSERT( sizeof(ARENA_LARGE) == offsetof(ARENA_LARGE, block) + sizeof(struct block) );
135 C_ASSERT( sizeof(ARENA_LARGE) == 4 * BLOCK_ALIGN );
136
137 #define BLOCK_TYPE_USED 'u'
138 #define BLOCK_TYPE_DEAD 'D'
139 #define BLOCK_TYPE_FREE 'F'
140 #define BLOCK_TYPE_LARGE 'L'
141
142 #define BLOCK_FILL_USED 0x55
143 #define BLOCK_FILL_TAIL 0xab
144 #define BLOCK_FILL_FREE 0xfeeefeee
145
146 #define ROUND_ADDR(addr, mask) ((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
147 #define ROUND_SIZE(size, mask) ((((SIZE_T)(size) + (mask)) & ~(SIZE_T)(mask)))
148 #define FIELD_BITS(type, field) (sizeof(((type *)0)->field) * 8)
149 #define FIELD_MAX(type, field) (((SIZE_T)1 << FIELD_BITS(type, field)) - 1)
150
151 #define HEAP_MIN_BLOCK_SIZE ROUND_SIZE(sizeof(struct entry) + BLOCK_ALIGN, BLOCK_ALIGN - 1)
152
153 C_ASSERT( sizeof(struct block) <= HEAP_MIN_BLOCK_SIZE );
154 C_ASSERT( sizeof(struct entry) <= HEAP_MIN_BLOCK_SIZE );
155
156 /* used block size is coded into block_size */
157 #define HEAP_MAX_USED_BLOCK_SIZE (FIELD_MAX( struct block, block_size ) * BLOCK_ALIGN)
158 /* free block size is coded into block_size + tail_size */
159 #define HEAP_MAX_FREE_BLOCK_SIZE (HEAP_MAX_USED_BLOCK_SIZE + (FIELD_MAX( struct block, tail_size ) << 16) * BLOCK_ALIGN)
160 /* subheap distance is coded into base_offset */
161 #define HEAP_MAX_BLOCK_REGION_SIZE (FIELD_MAX( struct block, base_offset ) * REGION_ALIGN)
162
163 C_ASSERT( HEAP_MAX_USED_BLOCK_SIZE == 512 * 1024 * (sizeof(void *) / 4) - BLOCK_ALIGN );
164 C_ASSERT( HEAP_MAX_FREE_BLOCK_SIZE >= 128 * 1024 * 1024 * (sizeof(void *) / 4) - BLOCK_ALIGN );
165 C_ASSERT( HEAP_MAX_BLOCK_REGION_SIZE >= 128 * 1024 * 1024 * (sizeof(void *) / 4) - BLOCK_ALIGN );
166 C_ASSERT( HEAP_MAX_FREE_BLOCK_SIZE >= HEAP_MAX_BLOCK_REGION_SIZE );
167
168 /* minimum size to start allocating large blocks */
169 #define HEAP_MIN_LARGE_BLOCK_SIZE (HEAP_MAX_USED_BLOCK_SIZE - 0x1000)
170
171 #define FREE_LIST_LINEAR_BITS 2
172 #define FREE_LIST_LINEAR_MASK ((1 << FREE_LIST_LINEAR_BITS) - 1)
173 #define FREE_LIST_COUNT ((FIELD_BITS( struct block, block_size ) - FREE_LIST_LINEAR_BITS + 1) * (1 << FREE_LIST_LINEAR_BITS) + 1)
174 /* for reference, update this when changing parameters */
175 C_ASSERT( FREE_LIST_COUNT == 0x3d );
176
177 typedef struct DECLSPEC_ALIGN(BLOCK_ALIGN) tagSUBHEAP
178 {
179 SIZE_T __pad[sizeof(SIZE_T) / sizeof(DWORD)];
180 SIZE_T block_size;
181 SIZE_T data_size;
182 struct list entry;
183 void *user_value;
184 struct block block;
185 } SUBHEAP;
186
187 /* block must be last and aligned */
188 C_ASSERT( sizeof(SUBHEAP) == offsetof(SUBHEAP, block) + sizeof(struct block) );
189 C_ASSERT( sizeof(SUBHEAP) == 4 * BLOCK_ALIGN );
190
191
192 /* LFH block size bins */
193
194 #define BIN_SIZE_MIN_0 0
195 #define BIN_SIZE_MIN_1 0x100
196 #define BIN_SIZE_MIN_2 0x200
197 #define BIN_SIZE_MIN_3 0x400
198 #define BIN_SIZE_MIN_4 0x800
199 #define BIN_SIZE_MIN_5 0x1000
200 #define BIN_SIZE_MIN_6 0x2000
201 #define BIN_SIZE_MIN_7 0x4000
202 #define BIN_SIZE_MAX 0x8000
203
204 #define BIN_SIZE_STEP_0 (16)
205 #define BIN_SIZE_STEP_1 (BIN_SIZE_MIN_1 >> 4)
206 #define BIN_SIZE_STEP_2 (BIN_SIZE_MIN_2 >> 4)
207 #define BIN_SIZE_STEP_3 (BIN_SIZE_MIN_3 >> 4)
208 #define BIN_SIZE_STEP_4 (BIN_SIZE_MIN_4 >> 4)
209 #define BIN_SIZE_STEP_5 (BIN_SIZE_MIN_5 >> 4)
210 #define BIN_SIZE_STEP_6 (BIN_SIZE_MIN_6 >> 4)
211 #define BIN_SIZE_STEP_7 (BIN_SIZE_MIN_7 >> 4)
212
213 #define BLOCK_BIN_SIZE_N( n, bin ) (BIN_SIZE_MIN_##n + (bin + 1) * BIN_SIZE_STEP_##n)
214 #define BLOCK_SIZE_BIN_N( n, size ) (((size) - 1 - BIN_SIZE_MIN_##n) / BIN_SIZE_STEP_##n)
215
216 #define BLOCK_BIN_SIZE( bin ) ((bin) >= 0x80 ? ~(SIZE_T)0 : \
217 (bin) >= 0x70 ? BLOCK_BIN_SIZE_N( 7, bin - 0x70 ) : \
218 (bin) >= 0x60 ? BLOCK_BIN_SIZE_N( 6, bin - 0x60 ) : \
219 (bin) >= 0x50 ? BLOCK_BIN_SIZE_N( 5, bin - 0x50 ) : \
220 (bin) >= 0x40 ? BLOCK_BIN_SIZE_N( 4, bin - 0x40 ) : \
221 (bin) >= 0x30 ? BLOCK_BIN_SIZE_N( 3, bin - 0x30 ) : \
222 (bin) >= 0x20 ? BLOCK_BIN_SIZE_N( 2, bin - 0x20 ) : \
223 (bin) >= 0x10 ? BLOCK_BIN_SIZE_N( 1, bin - 0x10 ) : \
224 BLOCK_BIN_SIZE_N( 0, bin ))
225
226 #define BLOCK_SIZE_BIN( size ) ((size) > BIN_SIZE_MAX ? 0x80 : \
227 (size) > BIN_SIZE_MIN_7 ? 0x70 + BLOCK_SIZE_BIN_N( 7, size ) : \
228 (size) > BIN_SIZE_MIN_6 ? 0x60 + BLOCK_SIZE_BIN_N( 6, size ) : \
229 (size) > BIN_SIZE_MIN_5 ? 0x50 + BLOCK_SIZE_BIN_N( 5, size ) : \
230 (size) > BIN_SIZE_MIN_4 ? 0x40 + BLOCK_SIZE_BIN_N( 4, size ) : \
231 (size) > BIN_SIZE_MIN_3 ? 0x30 + BLOCK_SIZE_BIN_N( 3, size ) : \
232 (size) > BIN_SIZE_MIN_2 ? 0x20 + BLOCK_SIZE_BIN_N( 2, size ) : \
233 (size) > BIN_SIZE_MIN_1 ? 0x10 + BLOCK_SIZE_BIN_N( 1, size ) : \
234 (size) <= BIN_SIZE_MIN_0 ? 0 : BLOCK_SIZE_BIN_N( 0, size ))
235
236 #define BLOCK_SIZE_BIN_COUNT (BLOCK_SIZE_BIN( BIN_SIZE_MAX + 1 ) + 1)
237
238 /* macros sanity checks */
239 C_ASSERT( BLOCK_SIZE_BIN( 0 ) == 0 );
240 C_ASSERT( BLOCK_SIZE_BIN( 0x10 ) == 0 );
241 C_ASSERT( BLOCK_BIN_SIZE( 0 ) == BIN_SIZE_MIN_0 + 1 * BIN_SIZE_STEP_0 );
242 C_ASSERT( BLOCK_SIZE_BIN( 0x11 ) == 1 );
243 C_ASSERT( BLOCK_BIN_SIZE( 1 ) == BIN_SIZE_MIN_0 + 2 * BIN_SIZE_STEP_0 );
244 C_ASSERT( BLOCK_SIZE_BIN( BIN_SIZE_MAX ) == 0x7f );
245 C_ASSERT( BLOCK_BIN_SIZE( 0x7f ) == BIN_SIZE_MAX );
246 C_ASSERT( BLOCK_SIZE_BIN( BIN_SIZE_MAX + 1 ) == 0x80 );
247 C_ASSERT( BLOCK_BIN_SIZE( 0x80 ) == ~(SIZE_T)0 );
248
249 /* difference between block classes and all possible validation overhead must fit into block tail_size */
250 C_ASSERT( BIN_SIZE_STEP_7 + 3 * BLOCK_ALIGN <= FIELD_MAX( struct block, tail_size ) );
251
252 static BYTE affinity_mapping[] = {20,6,31,15,14,29,27,4,18,24,26,13,0,9,2,30,17,7,23,25,10,19,12,3,22,21,5,16,1,28,11,8};
253 static LONG next_thread_affinity;
254
255 /* a bin, tracking heap blocks of a certain size */
256 struct bin
257 {
258 /* counters for LFH activation */
259 LONG count_alloc;
260 LONG count_freed;
261 LONG enabled;
262
263 /* list of groups with free blocks */
264 SLIST_HEADER groups;
265
266 /* array of affinity reserved groups, interleaved with other bins to keep
267 * all pointers of the same affinity and different bin grouped together,
268 * and pointers of the same bin and different affinity away from each other,
269 * hopefully in separate cache lines.
270 */
271 struct group **affinity_group_base;
272 };
273
274 static inline struct group **bin_get_affinity_group( struct bin *bin, BYTE affinity )
275 {
276 return bin->affinity_group_base + affinity * BLOCK_SIZE_BIN_COUNT;
277 }
278
279 struct heap
280 { /* win32/win64 */
281 DWORD_PTR unknown1[2]; /* 0000/0000 */
282 DWORD ffeeffee; /* 0008/0010 */
283 DWORD auto_flags; /* 000c/0014 */
284 DWORD_PTR unknown2[7]; /* 0010/0018 */
285 DWORD unknown3[2]; /* 002c/0050 */
286 DWORD_PTR unknown4[3]; /* 0034/0058 */
287 DWORD flags; /* 0040/0070 */
288 DWORD force_flags; /* 0044/0074 */
289 /* end of the Windows 10 compatible struct layout */
290
291 LONG compat_info; /* HeapCompatibilityInformation / heap frontend type */
292 struct list entry; /* Entry in process heap list */
293 struct list subheap_list; /* Sub-heap list */
294 struct list large_list; /* Large blocks list */
295 SIZE_T grow_size; /* Size of next subheap for growing heap */
296 SIZE_T min_size; /* Minimum committed size */
297 DWORD magic; /* Magic number */
298 DWORD pending_pos; /* Position in pending free requests ring */
299 struct block **pending_free; /* Ring buffer for pending free requests */
300 RTL_CRITICAL_SECTION cs;
301 struct entry free_lists[FREE_LIST_COUNT];
302 struct bin *bins;
303 SUBHEAP subheap;
304 };
305
306 /* subheap must be last and aligned */
307 C_ASSERT( sizeof(struct heap) == offsetof(struct heap, subheap) + sizeof(SUBHEAP) );
308 C_ASSERT( sizeof(struct heap) % BLOCK_ALIGN == 0 );
309 C_ASSERT( offsetof(struct heap, subheap) <= REGION_ALIGN - 1 );
310
311 #define HEAP_MAGIC ((DWORD)('H' | ('E'<<8) | ('A'<<16) | ('P'<<24)))
312
313 #define HEAP_INITIAL_SIZE 0x10000
314 #define HEAP_INITIAL_GROW_SIZE 0x100000
315 #define HEAP_MAX_GROW_SIZE 0xfd0000
316
317 C_ASSERT( HEAP_MIN_LARGE_BLOCK_SIZE <= HEAP_INITIAL_GROW_SIZE );
318
319 #define MAX_FREE_PENDING 1024 /* max number of free requests to delay */
320
321 /* some undocumented flags (names are made up) */
322 #define HEAP_PRIVATE 0x00001000
323 #define HEAP_ADD_USER_INFO 0x00000100
324 #define HEAP_USER_FLAGS_MASK 0x00000f00
325 #define HEAP_PAGE_ALLOCS 0x01000000
326 #define HEAP_VALIDATE 0x10000000
327 #define HEAP_VALIDATE_ALL 0x20000000
328 #define HEAP_VALIDATE_PARAMS 0x40000000
329 #define HEAP_CHECKING_ENABLED 0x80000000
330
331 static struct heap *process_heap; /* main process heap */
332
333 static NTSTATUS heap_free_block_lfh( struct heap *heap, ULONG flags, struct block *block );
334
335 /* check if memory range a contains memory range b */
336 static inline BOOL contains( const void *a, SIZE_T a_size, const void *b, SIZE_T b_size )
337 {
338 const void *a_end = (char *)a + a_size, *b_end = (char *)b + b_size;
339 return a <= b && b <= b_end && b_end <= a_end;
340 }
341
342 static inline UINT block_get_flags( const struct block *block )
343 {
344 return block->block_flags;
345 }
346
347 static inline UINT block_get_type( const struct block *block )
348 {
349 return block->block_type;
350 }
351
352 static inline void block_set_base( struct block *block, const void *base )
353 {
354 const char *offset = ROUND_ADDR( block, REGION_ALIGN - 1 );
355 block->base_offset = (offset - (char *)base) / REGION_ALIGN;
356 }
357
358 static inline void block_set_type( struct block *block, UINT type )
359 {
360 block->block_type = type;
361 }
362
363 static inline SUBHEAP *block_get_subheap( const struct heap *heap, const struct block *block )
364 {
365 char *offset = ROUND_ADDR( block, REGION_ALIGN - 1 );
366 void *base = offset - (SIZE_T)block->base_offset * REGION_ALIGN;
367 if (base != (void *)heap) return base;
368 else return (SUBHEAP *)&heap->subheap;
369 }
370
371 static inline UINT block_get_overhead( const struct block *block )
372 {
373 if (block_get_flags( block ) & BLOCK_FLAG_FREE) return sizeof(*block) + sizeof(struct list);
374 return sizeof(*block) + block->tail_size;
375 }
376
377 /* return the size of a block, including its header */
378 static inline UINT block_get_size( const struct block *block )
379 {
380 UINT block_size = block->block_size;
381 if (block_get_flags( block ) & BLOCK_FLAG_FREE) block_size += (UINT)block->tail_size << 16;
382 return block_size * BLOCK_ALIGN;
383 }
384
385 static inline void block_set_size( struct block *block, UINT block_size )
386 {
387 block_size /= BLOCK_ALIGN;
388 if (block_get_flags( block ) & BLOCK_FLAG_FREE) block->tail_size = block_size >> 16;
389 block->block_size = block_size;
390 }
391
392 static inline void block_set_flags( struct block *block, BYTE clear, BYTE set )
393 {
394 UINT block_size = block_get_size( block );
395 block->block_flags &= ~clear;
396 block->block_flags |= set;
397 block_set_size( block, block_size );
398 }
399
400 static inline void *subheap_base( const SUBHEAP *subheap )
401 {
402 return ROUND_ADDR( subheap, REGION_ALIGN - 1 );
403 }
404
405 static inline SIZE_T subheap_overhead( const SUBHEAP *subheap )
406 {
407 return (char *)&subheap->block - (char *)subheap_base( subheap );
408 }
409
410 static inline SIZE_T subheap_size( const SUBHEAP *subheap )
411 {
412 return subheap->block_size + subheap_overhead( subheap );
413 }
414
415 static inline const void *subheap_commit_end( const SUBHEAP *subheap )
416 {
417 return (char *)(subheap + 1) + subheap->data_size;
418 }
419
420 static void subheap_set_bounds( SUBHEAP *subheap, char *commit_end, char *end )
421 {
422 subheap->block_size = end - (char *)&subheap->block;
423 subheap->data_size = commit_end - (char *)(subheap + 1);
424 }
425
426 static inline void *first_block( const SUBHEAP *subheap )
427 {
428 return (void *)&subheap->block;
429 }
430
431 static inline const void *last_block( const SUBHEAP *subheap )
432 {
433 return (char *)subheap_commit_end( subheap ) - sizeof(struct block);
434 }
435
436 static inline struct block *next_block( const SUBHEAP *subheap, const struct block *block )
437 {
438 const char *data = (char *)(block + 1), *next, *last = last_block( subheap );
439 next = (char *)block + block_get_size( block );
440 if (!contains( data, last - (char *)data, next, sizeof(*block) )) return NULL;
441 return (struct block *)next;
442 }
443
444 static inline BOOL check_subheap( const SUBHEAP *subheap, const struct heap *heap )
445 {
446 if (subheap->user_value != heap) return FALSE;
447
448 return contains( &subheap->block, subheap->block_size, subheap + 1, subheap->data_size );
449 }
450
451 static BOOL heap_validate( const struct heap *heap );
452
453 /* mark a block of memory as innacessible for debugging purposes */
454 static inline void valgrind_make_noaccess( void const *ptr, SIZE_T size )
455 {
456 #if defined(VALGRIND_MAKE_MEM_NOACCESS)
457 VALGRIND_DISCARD( VALGRIND_MAKE_MEM_NOACCESS( ptr, size ) );
458 #elif defined(VALGRIND_MAKE_NOACCESS)
459 VALGRIND_DISCARD( VALGRIND_MAKE_NOACCESS( ptr, size ) );
460 #endif
461 }
462
463 /* mark a block of memory as initialized for debugging purposes */
464 static inline void valgrind_make_readable( void const *ptr, SIZE_T size )
465 {
466 #if defined(VALGRIND_MAKE_MEM_DEFINED)
467 VALGRIND_DISCARD( VALGRIND_MAKE_MEM_DEFINED( ptr, size ) );
468 #elif defined(VALGRIND_MAKE_READABLE)
469 VALGRIND_DISCARD( VALGRIND_MAKE_READABLE( ptr, size ) );
470 #endif
471 }
472
473 /* mark a block of memory as uninitialized for debugging purposes */
474 static inline void valgrind_make_writable( void const *ptr, SIZE_T size )
475 {
476 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
477 VALGRIND_DISCARD( VALGRIND_MAKE_MEM_UNDEFINED( ptr, size ) );
478 #elif defined(VALGRIND_MAKE_WRITABLE)
479 VALGRIND_DISCARD( VALGRIND_MAKE_WRITABLE( ptr, size ) );
480 #endif
481 }
482
483 /* mark a block of memory as free for debugging purposes */
484 static inline void mark_block_free( void *ptr, SIZE_T size, DWORD flags )
485 {
486 if (flags & HEAP_FREE_CHECKING_ENABLED)
487 {
488 SIZE_T i;
489 for (i = 0; i < size / sizeof(DWORD); i++) ((DWORD *)ptr)[i] = BLOCK_FILL_FREE;
490 }
491 valgrind_make_noaccess( ptr, size );
492 }
493
494 /* mark a block of memory as a tail block */
495 static inline void mark_block_tail( struct block *block, DWORD flags )
496 {
497 char *tail = (char *)block + block_get_size( block ) - block->tail_size;
498 if (flags & HEAP_TAIL_CHECKING_ENABLED)
499 {
500 valgrind_make_writable( tail, BLOCK_ALIGN );
501 memset( tail, BLOCK_FILL_TAIL, BLOCK_ALIGN );
502 }
503 valgrind_make_noaccess( tail, BLOCK_ALIGN );
504 if (flags & HEAP_ADD_USER_INFO)
505 {
506 if (flags & HEAP_TAIL_CHECKING_ENABLED || RUNNING_ON_VALGRIND) tail += BLOCK_ALIGN;
507 valgrind_make_writable( tail, BLOCK_ALIGN );
508 memset( tail, 0, BLOCK_ALIGN );
509 }
510 }
511
512 /* initialize contents of a newly created block of memory */
513 static inline void initialize_block( struct block *block, SIZE_T old_size, SIZE_T size, DWORD flags )
514 {
515 char *data = (char *)(block + 1);
516
517 if (size <= old_size) return;
518
519 if (flags & HEAP_ZERO_MEMORY)
520 {
521 valgrind_make_writable( data + old_size, size - old_size );
522 memset( data + old_size, 0, size - old_size );
523 }
524 else if (flags & HEAP_FREE_CHECKING_ENABLED)
525 {
526 valgrind_make_writable( data + old_size, size - old_size );
527 memset( data + old_size, BLOCK_FILL_USED, size - old_size );
528 }
529 }
530
531 /* notify that a new block of memory has been allocated for debugging purposes */
532 static inline void valgrind_notify_alloc( void const *ptr, SIZE_T size, BOOL init )
533 {
534 #ifdef VALGRIND_MALLOCLIKE_BLOCK
535 VALGRIND_MALLOCLIKE_BLOCK( ptr, size, 0, init );
536 #endif
537 }
538
539 /* notify that a block of memory has been freed for debugging purposes */
540 static inline void valgrind_notify_free( void const *ptr )
541 {
542 #ifdef VALGRIND_FREELIKE_BLOCK
543 VALGRIND_FREELIKE_BLOCK( ptr, 0 );
544 #endif
545 }
546
547 static inline void valgrind_notify_resize( void const *ptr, SIZE_T size_old, SIZE_T size_new )
548 {
549 #ifdef VALGRIND_RESIZEINPLACE_BLOCK
550 /* zero is not a valid size */
551 VALGRIND_RESIZEINPLACE_BLOCK( ptr, size_old ? size_old : 1, size_new ? size_new : 1, 0 );
552 #endif
553 }
554
555 static void valgrind_notify_free_all( SUBHEAP *subheap, const struct heap *heap )
556 {
557 #ifdef VALGRIND_FREELIKE_BLOCK
558 struct block *block;
559
560 if (!RUNNING_ON_VALGRIND) return;
561 if (!check_subheap( subheap, heap )) return;
562
563 for (block = first_block( subheap ); block; block = next_block( subheap, block ))
564 {
565 if (block_get_flags( block ) & BLOCK_FLAG_FREE) continue;
566 if (block_get_type( block ) == BLOCK_TYPE_USED) valgrind_notify_free( block + 1 );
567 }
568 #endif
569 }
570
571 /* get the memory protection type to use for a given heap */
572 static inline ULONG get_protection_type( DWORD flags )
573 {
574 return (flags & HEAP_CREATE_ENABLE_EXECUTE) ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
575 }
576
577 static RTL_CRITICAL_SECTION_DEBUG process_heap_cs_debug =
578 {
579 0, 0, NULL, /* will be set later */
580 { &process_heap_cs_debug.ProcessLocksList, &process_heap_cs_debug.ProcessLocksList },
581 0, 0, { (DWORD_PTR)(__FILE__ ": main process heap section") }
582 };
583
584 static inline ULONG heap_get_flags( const struct heap *heap, ULONG flags )
585 {
586 if (flags & (HEAP_TAIL_CHECKING_ENABLED | HEAP_FREE_CHECKING_ENABLED)) flags |= HEAP_CHECKING_ENABLED;
587 flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY | HEAP_REALLOC_IN_PLACE_ONLY | HEAP_CHECKING_ENABLED | HEAP_USER_FLAGS_MASK;
588 return heap->flags | flags;
589 }
590
591 static inline void heap_lock( struct heap *heap, ULONG flags )
592 {
593 if (flags & HEAP_NO_SERIALIZE) return;
594 RtlEnterCriticalSection( &heap->cs );
595 }
596
597 static inline void heap_unlock( struct heap *heap, ULONG flags )
598 {
599 if (flags & HEAP_NO_SERIALIZE) return;
600 RtlLeaveCriticalSection( &heap->cs );
601 }
602
603 static void heap_set_status( const struct heap *heap, ULONG flags, NTSTATUS status )
604 {
605 if (status == STATUS_NO_MEMORY && (flags & HEAP_GENERATE_EXCEPTIONS)) RtlRaiseStatus( status );
606 if (status) RtlSetLastWin32ErrorAndNtStatusFromNtStatus( status );
607 }
608
609 static SIZE_T get_free_list_block_size( unsigned int index )
610 {
611 DWORD log = index >> FREE_LIST_LINEAR_BITS;
612 DWORD linear = index & FREE_LIST_LINEAR_MASK;
613
614 if (log == 0) return index * BLOCK_ALIGN;
615
616 return (((1 << FREE_LIST_LINEAR_BITS) + linear) << (log - 1)) * BLOCK_ALIGN;
617 }
618
619 /*
620 * Given a size, return its index in the block size list for freelists.
621 *
622 * With FREE_LIST_LINEAR_BITS=2, the list looks like this
623 * (with respect to size / BLOCK_ALIGN):
624 * 0,
625 * 1, 2, 3, 4, 5, 6, 7, 8,
626 * 10, 12, 14, 16, 20, 24, 28, 32,
627 * 40, 48, 56, 64, 80, 96, 112, 128,
628 * 160, 192, 224, 256, 320, 384, 448, 512,
629 * ...
630 */
631 static unsigned int get_free_list_index( SIZE_T block_size )
632 {
633 DWORD bit, log, linear;
634
635 if (block_size > get_free_list_block_size( FREE_LIST_COUNT - 1 ))
636 return FREE_LIST_COUNT - 1;
637
638 block_size /= BLOCK_ALIGN;
639 /* find the highest bit */
640 if (!BitScanReverse( &bit, block_size ) || bit < FREE_LIST_LINEAR_BITS)
641 {
642 /* for small values, the index is same as block_size. */
643 log = 0;
644 linear = block_size;
645 }
646 else
647 {
648 /* the highest bit is always set, ignore it and encode the next FREE_LIST_LINEAR_BITS bits
649 * as a linear scale, combined with the shift as a log scale, in the free list index. */
650 log = bit - FREE_LIST_LINEAR_BITS + 1;
651 linear = (block_size >> (bit - FREE_LIST_LINEAR_BITS)) & FREE_LIST_LINEAR_MASK;
652 }
653
654 return (log << FREE_LIST_LINEAR_BITS) + linear;
655 }
656
657 /* locate a free list entry of the appropriate size */
658 static inline struct entry *find_free_list( struct heap *heap, SIZE_T block_size, BOOL last )
659 {
660 unsigned int index = get_free_list_index( block_size );
661 if (last && ++index == FREE_LIST_COUNT) index = 0;
662 return &heap->free_lists[index];
663 }
664
665 static void heap_dump( const struct heap *heap )
666 {
667 const struct block *block;
668 const ARENA_LARGE *large;
669 const SUBHEAP *subheap;
670 unsigned int i;
671
672 TRACE( "heap: %p\n", heap );
673 TRACE( " next %p\n", LIST_ENTRY( heap->entry.next, struct heap, entry ) );
674
675 TRACE( " bins:\n" );
676 for (i = 0; heap->bins && i < BLOCK_SIZE_BIN_COUNT; i++)
677 {
678 const struct bin *bin = heap->bins + i;
679 ULONG alloc = ReadNoFence( &bin->count_alloc ), freed = ReadNoFence( &bin->count_freed );
680 if (!alloc && !freed) continue;
681 TRACE( " %3u: size %#4Ix, alloc %ld, freed %ld, enabled %lu\n", i, BLOCK_BIN_SIZE( i ),
682 alloc, freed, ReadNoFence( &bin->enabled ) );
683 }
684
685 TRACE( " free_lists: %p\n", heap->free_lists );
686 for (i = 0; i < FREE_LIST_COUNT; i++)
687 TRACE( " %p: size %#8Ix, prev %p, next %p\n", heap->free_lists + i, get_free_list_block_size( i ),
688 LIST_ENTRY( heap->free_lists[i].entry.prev, struct entry, entry ),
689 LIST_ENTRY( heap->free_lists[i].entry.next, struct entry, entry ) );
690
691 TRACE( " subheaps: %p\n", &heap->subheap_list );
692 LIST_FOR_EACH_ENTRY( subheap, &heap->subheap_list, SUBHEAP, entry )
693 {
694 SIZE_T free_size = 0, used_size = 0, overhead = 0;
695 const char *base = subheap_base( subheap );
696
697 TRACE( " %p: base %p first %p last %p end %p\n", subheap, base, first_block( subheap ),
698 last_block( subheap ), base + subheap_size( subheap ) );
699
700 if (!check_subheap( subheap, heap )) return;
701
702 overhead += subheap_overhead( subheap );
703 for (block = first_block( subheap ); block; block = next_block( subheap, block ))
704 {
705 if (block_get_flags( block ) & BLOCK_FLAG_FREE)
706 {
707 TRACE( " %p: (free) type %#10x, size %#8x, flags %#4x, prev %p, next %p\n", block,
708 block_get_type( block ), block_get_size( block ), block_get_flags( block ),
709 LIST_ENTRY( ((struct entry *)block)->entry.prev, struct entry, entry ),
710 LIST_ENTRY( ((struct entry *)block)->entry.next, struct entry, entry ) );
711
712 overhead += block_get_overhead( block );
713 free_size += block_get_size( block ) - block_get_overhead( block );
714 }
715 else
716 {
717 TRACE( " %p: (used) type %#10x, size %#8x, flags %#4x, unused %#4x", block,
718 block_get_type( block ), block_get_size( block ), block_get_flags( block ),
719 block->tail_size );
720 if (!(block_get_flags( block ) & BLOCK_FLAG_PREV_FREE)) TRACE( "\n" );
721 else TRACE( ", back %p\n", *((struct block **)block - 1) );
722
723 overhead += block_get_overhead( block );
724 used_size += block_get_size( block ) - block_get_overhead( block );
725 }
726 }
727
728 TRACE( " total %#Ix, used %#Ix, free %#Ix, overhead %#Ix (%Iu%%)\n", used_size + free_size + overhead,
729 used_size, free_size, overhead, (overhead * 100) / subheap_size( subheap ) );
730 }
731
732 TRACE( " large blocks: %p\n", &heap->large_list );
733 LIST_FOR_EACH_ENTRY( large, &heap->large_list, ARENA_LARGE, entry )
734 {
735 TRACE( " %p: (large) type %#10x, size %#8x, flags %#4x, total_size %#10Ix, alloc_size %#10Ix, prev %p, next %p\n",
736 large, block_get_type( &large->block ), block_get_size( &large->block ), block_get_flags( &large->block ), large->block_size,
737 large->data_size, LIST_ENTRY( large->entry.prev, ARENA_LARGE, entry ), LIST_ENTRY( large->entry.next, ARENA_LARGE, entry ) );
738 }
739
740 if (heap->pending_free)
741 {
742 TRACE( " pending blocks: %p\n", heap->pending_free );
743 for (i = 0; i < MAX_FREE_PENDING; ++i)
744 {
745 if (!(block = heap->pending_free[i])) break;
746
747 TRACE( " %c%p: (pend) type %#10x, size %#8x, flags %#4x, unused %#4x", i == heap->pending_pos ? '*' : ' ',
748 block, block_get_type( block ), block_get_size( block ), block_get_flags( block ), block->tail_size );
749 if (!(block_get_flags( block ) & BLOCK_FLAG_PREV_FREE)) TRACE( "\n" );
750 else TRACE( ", back %p\n", *((struct block **)block - 1) );
751 }
752 }
753 }
754
755 static const char *debugstr_heap_entry( struct rtl_heap_entry *entry )
756 {
757 const char *str = wine_dbg_sprintf( "data %p, size %#Ix, overhead %#x, region %#x, flags %#x", entry->lpData,
758 entry->cbData, entry->cbOverhead, entry->iRegionIndex, entry->wFlags );
759 if (!(entry->wFlags & RTL_HEAP_ENTRY_REGION)) return str;
760 return wine_dbg_sprintf( "%s, commit %#lx, uncommit %#lx, first %p, last %p", str, entry->Region.dwCommittedSize,
761 entry->Region.dwUnCommittedSize, entry->Region.lpFirstBlock, entry->Region.lpLastBlock );
762 }
763
764 static struct heap *unsafe_heap_from_handle( HANDLE handle, ULONG flags, ULONG *heap_flags )
765 {
766 struct heap *heap = handle;
767 BOOL valid = TRUE;
768
769 if (!heap || (heap->magic != HEAP_MAGIC))
770 {
771 ERR( "Invalid handle %p!\n", handle );
772 return NULL;
773 }
774 if (heap->flags & HEAP_VALIDATE_ALL)
775 {
776 heap_lock( heap, 0 );
777 valid = heap_validate( heap );
778 heap_unlock( heap, 0 );
779
780 if (!valid && TRACE_ON(heap))
781 {
782 heap_dump( heap );
783 assert( FALSE );
784 }
785 }
786
787 *heap_flags = heap_get_flags( heap, flags );
788 return valid ? heap : NULL;
789 }
790
791
792 static SUBHEAP *find_subheap( const struct heap *heap, const struct block *block, BOOL heap_walk )
793 {
794 SUBHEAP *subheap;
795
796 LIST_FOR_EACH_ENTRY( subheap, &heap->subheap_list, SUBHEAP, entry )
797 {
798 SIZE_T blocks_size = (char *)last_block( subheap ) - (char *)first_block( subheap );
799 if (!check_subheap( subheap, heap )) return NULL;
800 if (contains( first_block( subheap ), blocks_size, block, sizeof(*block) )) return subheap;
801 /* outside of blocks region, possible corruption or heap_walk */
802 if (contains( subheap_base( subheap ), subheap_size( subheap ), block, 1 )) return heap_walk ? subheap : NULL;
803 }
804
805 return NULL;
806 }
807
808
809 static inline BOOL subheap_commit( const struct heap *heap, SUBHEAP *subheap, const struct block *block, SIZE_T block_size )
810 {
811 const char *end = (char *)subheap_base( subheap ) + subheap_size( subheap ), *commit_end;
812 SIZE_T size;
813 void *addr;
814
815 commit_end = (char *)block + block_size + sizeof(struct entry);
816 commit_end = ROUND_ADDR( (char *)commit_end + REGION_ALIGN - 1, REGION_ALIGN - 1 );
817
818 if (commit_end > end) commit_end = end;
819 if (commit_end <= (char *)subheap_commit_end( subheap )) return TRUE;
820
821 addr = (void *)subheap_commit_end( subheap );
822 size = commit_end - (char *)addr;
823
824 if (NtAllocateVirtualMemory( NtCurrentProcess(), &addr, 0, &size, MEM_COMMIT,
825 get_protection_type( heap->flags ) ))
826 {
827 WARN( "Could not commit %#Ix bytes at %p for heap %p\n", size, addr, heap );
828 return FALSE;
829 }
830
831 subheap->data_size = (char *)commit_end - (char *)(subheap + 1);
832 return TRUE;
833 }
834
835 static inline BOOL subheap_decommit( const struct heap *heap, SUBHEAP *subheap, const void *commit_end )
836 {
837 char *base = subheap_base( subheap );
838 SIZE_T size;
839 void *addr;
840
841 commit_end = ROUND_ADDR( (char *)commit_end + REGION_ALIGN - 1, REGION_ALIGN - 1 );
842 if (subheap == &heap->subheap) commit_end = max( (char *)commit_end, (char *)base + heap->min_size );
843 if (commit_end >= subheap_commit_end( subheap )) return TRUE;
844
845 size = (char *)subheap_commit_end( subheap ) - (char *)commit_end;
846 addr = (void *)commit_end;
847
848 if (NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_DECOMMIT ))
849 {
850 WARN( "Could not decommit %#Ix bytes at %p for heap %p\n", size, addr, heap );
851 return FALSE;
852 }
853
854 subheap->data_size = (char *)commit_end - (char *)(subheap + 1);
855 return TRUE;
856 }
857
858 static void block_init_free( struct block *block, ULONG flags, SUBHEAP *subheap, SIZE_T block_size )
859 {
860 const char *end = (char *)block + block_size, *commit_end = subheap_commit_end( subheap );
861 struct entry *entry = (struct entry *)block;
862
863 valgrind_make_writable( block, sizeof(*entry) );
864 block_set_type( block, BLOCK_TYPE_FREE );
865 block_set_base( block, subheap_base( subheap ) );
866 block_set_flags( block, ~0, BLOCK_FLAG_FREE );
867 block_set_size( block, block_size );
868
869 /* If debugging, erase the freed block content */
870
871 if (end > commit_end) end = commit_end;
872 if (end > (char *)(entry + 1)) mark_block_free( entry + 1, end - (char *)(entry + 1), flags );
873 }
874
875 static void insert_free_block( struct heap *heap, ULONG flags, SUBHEAP *subheap, struct block *block )
876 {
877 struct entry *entry = (struct entry *)block, *list;
878 struct block *next;
879
880 if ((next = next_block( subheap, block )))
881 {
882 /* set the next block PREV_FREE flag and back pointer */
883 block_set_flags( next, 0, BLOCK_FLAG_PREV_FREE );
884 valgrind_make_writable( (struct block **)next - 1, sizeof(struct block *) );
885 *((struct block **)next - 1) = block;
886 }
887
888 list = find_free_list( heap, block_get_size( block ), !next );
889 if (!next) list_add_before( &list->entry, &entry->entry );
890 else list_add_after( &list->entry, &entry->entry );
891 }
892
893
894 static struct block *heap_delay_free( struct heap *heap, ULONG flags, struct block *block )
895 {
896 struct block *tmp;
897
898 if (!heap->pending_free) return block;
899
900 block_set_type( block, BLOCK_TYPE_DEAD );
901 mark_block_free( block + 1, block_get_size( block ) - sizeof(*block), flags );
902
903 heap_lock( heap, flags );
904
905 tmp = heap->pending_free[heap->pending_pos];
906 heap->pending_free[heap->pending_pos] = block;
907 heap->pending_pos = (heap->pending_pos + 1) % MAX_FREE_PENDING;
908
909 heap_unlock( heap, flags );
910
911 return tmp;
912 }
913
914
915 static NTSTATUS heap_free_block( struct heap *heap, ULONG flags, struct block *block )
916 {
917 SUBHEAP *subheap = block_get_subheap( heap, block );
918 SIZE_T block_size = block_get_size( block );
919 struct entry *entry;
920 struct block *next;
921
922 if ((next = next_block( subheap, block )) && (block_get_flags( next ) & BLOCK_FLAG_FREE))
923 {
924 /* merge with next block if it is free */
925 entry = (struct entry *)next;
926 block_size += block_get_size( &entry->block );
927 list_remove( &entry->entry );
928 next = next_block( subheap, next );
929 }
930
931 if (block_get_flags( block ) & BLOCK_FLAG_PREV_FREE)
932 {
933 /* merge with previous block if it is free */
934 entry = *((struct entry **)block - 1);
935 block_size += block_get_size( &entry->block );
936 list_remove( &entry->entry );
937 block = &entry->block;
938 }
939
940 if (block == first_block( subheap ) && !next && subheap != &heap->subheap)
941 {
942 /* free the subheap if it's empty and not the main one */
943 void *addr = subheap_base( subheap );
944 SIZE_T size = 0;
945
946 list_remove( &subheap->entry );
947 NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE );
948 return STATUS_SUCCESS;
949 }
950
951 block_init_free( block, flags, subheap, block_size );
952 insert_free_block( heap, flags, subheap, block );
953
954 /* keep room for a full committed block as hysteresis */
955 if (!next) subheap_decommit( heap, subheap, (char *)((struct entry *)block + 1) + REGION_ALIGN );
956
957 return STATUS_SUCCESS;
958 }
959
960
961 static struct block *split_block( struct heap *heap, ULONG flags, struct block *block,
962 SIZE_T old_block_size, SIZE_T block_size )
963 {
964 SUBHEAP *subheap = block_get_subheap( heap, block );
965
966 if (old_block_size >= block_size + HEAP_MIN_BLOCK_SIZE)
967 {
968 block_set_size( block, block_size );
969 return next_block( subheap, block );
970 }
971
972 block_set_size( block, old_block_size );
973 return NULL;
974 }
975
976
977 static void *allocate_region( struct heap *heap, ULONG flags, SIZE_T *region_size, SIZE_T *commit_size )
978 {
979 void *addr = NULL;
980 NTSTATUS status;
981
982 if (heap && !(flags & HEAP_GROWABLE))
983 {
984 WARN( "Heap %p isn't growable, cannot allocate %#Ix bytes\n", heap, *region_size );
985 return NULL;
986 }
987
988 /* allocate the memory block */
989 if ((status = NtAllocateVirtualMemory( NtCurrentProcess(), &addr, 0, region_size, MEM_RESERVE,
990 get_protection_type( flags ) )))
991 {
992 WARN( "Could not allocate %#Ix bytes, status %#lx\n", *region_size, status );
993 return NULL;
994 }
995 if ((status = NtAllocateVirtualMemory( NtCurrentProcess(), &addr, 0, commit_size, MEM_COMMIT,
996 get_protection_type( flags ) )))
997 {
998 WARN( "Could not commit %#Ix bytes, status %#lx\n", *commit_size, status );
999 return NULL;
1000 }
1001
1002 return addr;
1003 }
1004
1005
1006 static NTSTATUS heap_allocate_large( struct heap *heap, ULONG flags, SIZE_T block_size,
1007 SIZE_T size, void **ret )
1008 {
1009 ARENA_LARGE *arena;
1010 SIZE_T total_size = ROUND_SIZE( sizeof(*arena) + size, REGION_ALIGN - 1 );
1011 struct block *block;
1012
1013 if (total_size < size) return STATUS_NO_MEMORY; /* overflow */
1014 if (!(arena = allocate_region( heap, flags, &total_size, &total_size ))) return STATUS_NO_MEMORY;
1015
1016 block = &arena->block;
1017 arena->data_size = size;
1018 arena->block_size = (char *)arena + total_size - (char *)block;
1019
1020 block_set_type( block, BLOCK_TYPE_LARGE );
1021 block_set_base( block, arena );
1022 block_set_flags( block, ~0, BLOCK_FLAG_LARGE | BLOCK_USER_FLAGS( flags ) );
1023 block_set_size( block, 0 );
1024
1025 heap_lock( heap, flags );
1026 list_add_tail( &heap->large_list, &arena->entry );
1027 heap_unlock( heap, flags );
1028
1029 valgrind_make_noaccess( (char *)block + sizeof(*block) + arena->data_size,
1030 arena->block_size - sizeof(*block) - arena->data_size );
1031
1032 *ret = block + 1;
1033 return STATUS_SUCCESS;
1034 }
1035
1036
1037 static NTSTATUS heap_free_large( struct heap *heap, ULONG flags, struct block *block )
1038 {
1039 ARENA_LARGE *arena = CONTAINING_RECORD( block, ARENA_LARGE, block );
1040 LPVOID address = arena;
1041 SIZE_T size = 0;
1042
1043 heap_lock( heap, flags );
1044 list_remove( &arena->entry );
1045 heap_unlock( heap, flags );
1046
1047 return NtFreeVirtualMemory( NtCurrentProcess(), &address, &size, MEM_RELEASE );
1048 }
1049
1050
1051 /***********************************************************************
1052 * find_large_block
1053 */
1054 static BOOL find_large_block( const struct heap *heap, const struct block *block )
1055 {
1056 ARENA_LARGE *arena;
1057
1058 LIST_FOR_EACH_ENTRY( arena, &heap->large_list, ARENA_LARGE, entry )
1059 if (block == &arena->block) return TRUE;
1060
1061 return FALSE;
1062 }
1063
1064 static BOOL validate_large_block( const struct heap *heap, const struct block *block )
1065 {
1066 const ARENA_LARGE *arena = CONTAINING_RECORD( block, ARENA_LARGE, block );
1067 const char *err = NULL;
1068
1069 if (ROUND_ADDR( block, REGION_ALIGN - 1 ) != arena)
1070 err = "invalid block BLOCK_ALIGN";
1071 else if (block_get_size( block ))
1072 err = "invalid block size";
1073 else if (!(block_get_flags( block ) & BLOCK_FLAG_LARGE))
1074 err = "invalid block flags";
1075 else if (block_get_type( block ) != BLOCK_TYPE_LARGE)
1076 err = "invalid block type";
1077 else if (!contains( block, arena->block_size, block + 1, arena->data_size ))
1078 err = "invalid block size";
1079
1080 if (err)
1081 {
1082 ERR( "heap %p, block %p: %s\n", heap, block, err );
1083 if (TRACE_ON(heap)) heap_dump( heap );
1084 }
1085
1086 return !err;
1087 }
1088
1089
1090 static SUBHEAP *create_subheap( struct heap *heap, DWORD flags, SIZE_T total_size, SIZE_T commit_size )
1091 {
1092 SIZE_T block_size;
1093 SUBHEAP *subheap;
1094
1095 commit_size = ROUND_SIZE( max( commit_size, REGION_ALIGN ), REGION_ALIGN - 1 );
1096 total_size = min( max( commit_size, total_size ), 0xffff0000 ); /* don't allow a heap larger than 4GB */
1097
1098 if (!(subheap = allocate_region( heap, flags, &total_size, &commit_size ))) return NULL;
1099
1100 subheap->user_value = heap;
1101 subheap_set_bounds( subheap, (char *)subheap + commit_size, (char *)subheap + total_size );
1102 block_size = (SIZE_T)ROUND_ADDR( subheap_size( subheap ) - subheap_overhead( subheap ), BLOCK_ALIGN - 1 );
1103 block_init_free( first_block( subheap ), flags, subheap, block_size );
1104
1105 list_add_head( &heap->subheap_list, &subheap->entry );
1106
1107 return subheap;
1108 }
1109
1110
1111 static struct block *find_free_block( struct heap *heap, ULONG flags, SIZE_T block_size )
1112 {
1113 struct list *ptr = &find_free_list( heap, block_size, FALSE )->entry;
1114 struct entry *entry;
1115 struct block *block;
1116 SIZE_T total_size;
1117 SUBHEAP *subheap;
1118
1119 /* Find a suitable free list, and in it find a block large enough */
1120
1121 while ((ptr = list_next( &heap->free_lists[0].entry, ptr )))
1122 {
1123 entry = LIST_ENTRY( ptr, struct entry, entry );
1124 block = &entry->block;
1125 if (block_get_flags( block ) == BLOCK_FLAG_FREE_LINK) continue;
1126 if (block_get_size( block ) >= block_size)
1127 {
1128 if (!subheap_commit( heap, block_get_subheap( heap, block ), block, block_size )) return NULL;
1129 list_remove( &entry->entry );
1130 return block;
1131 }
1132 }
1133
1134 /* make sure we can fit the block and a free entry at the end */
1135 total_size = sizeof(SUBHEAP) + block_size + sizeof(struct entry);
1136 if (total_size < block_size) return NULL; /* overflow */
1137
1138 if ((subheap = create_subheap( heap, flags, max( heap->grow_size, total_size ), total_size )))
1139 {
1140 heap->grow_size = min( heap->grow_size * 2, HEAP_MAX_GROW_SIZE );
1141 }
1142 else while (!subheap) /* shrink the grow size again if we are running out of space */
1143 {
1144 if (heap->grow_size <= total_size || heap->grow_size <= 4 * 1024 * 1024) return NULL;
1145 heap->grow_size /= 2;
1146 subheap = create_subheap( heap, flags, max( heap->grow_size, total_size ), total_size );
1147 }
1148
1149 TRACE( "created new sub-heap %p of %#Ix bytes for heap %p\n", subheap, subheap_size( subheap ), heap );
1150
1151 return first_block( subheap );
1152 }
1153
1154
1155 static BOOL is_valid_free_block( const struct heap *heap, const struct block *block )
1156 {
1157 const SUBHEAP *subheap;
1158 unsigned int i;
1159
1160 if ((subheap = find_subheap( heap, block, FALSE ))) return TRUE;
1161 for (i = 0; i < FREE_LIST_COUNT; i++) if (block == &heap->free_lists[i].block) return TRUE;
1162 return FALSE;
1163 }
1164
1165 static BOOL validate_free_block( const struct heap *heap, const SUBHEAP *subheap, const struct block *block )
1166 {
1167 const char *err = NULL, *base = subheap_base( subheap ), *commit_end = subheap_commit_end( subheap );
1168 const struct entry *entry = (struct entry *)block;
1169 const struct block *prev, *next;
1170 DWORD flags = heap->flags;
1171
1172 if ((ULONG_PTR)(block + 1) % BLOCK_ALIGN)
1173 err = "invalid block BLOCK_ALIGN";
1174 else if (block_get_type( block ) != BLOCK_TYPE_FREE)
1175 err = "invalid block header";
1176 else if (!(block_get_flags( block ) & BLOCK_FLAG_FREE) || (block_get_flags( block ) & BLOCK_FLAG_PREV_FREE))
1177 err = "invalid block flags";
1178 else if (!contains( base, subheap_size( subheap ), block, block_get_size( block ) ))
1179 err = "invalid block size";
1180 else if (!is_valid_free_block( heap, (next = &LIST_ENTRY( entry->entry.next, struct entry, entry )->block) ))
1181 err = "invalid next free block pointer";
1182 else if (!(block_get_flags( next ) & BLOCK_FLAG_FREE) || block_get_type( next ) != BLOCK_TYPE_FREE)
1183 err = "invalid next free block header";
1184 else if (!is_valid_free_block( heap, (prev = &LIST_ENTRY( entry->entry.prev, struct entry, entry )->block) ))
1185 err = "invalid previous free block pointer";
1186 else if (!(block_get_flags( prev ) & BLOCK_FLAG_FREE) || block_get_type( prev ) != BLOCK_TYPE_FREE)
1187 err = "invalid previous free block header";
1188 else if ((next = next_block( subheap, block )))
1189 {
1190 if (!(block_get_flags( next ) & BLOCK_FLAG_PREV_FREE))
1191 err = "invalid next block flags";
1192 if (*((struct block **)next - 1) != block)
1193 err = "invalid next block back pointer";
1194 }
1195
1196 if (!err && (flags & HEAP_FREE_CHECKING_ENABLED))
1197 {
1198 const char *ptr = (char *)(entry + 1), *end = (char *)block + block_get_size( block );
1199 if (next) end -= sizeof(struct block *);
1200 if (end > commit_end) end = commit_end;
1201 while (!err && ptr < end)
1202 {
1203 if (*(DWORD *)ptr != BLOCK_FILL_FREE) err = "free block overwritten";
1204 ptr += sizeof(DWORD);
1205 }
1206 }
1207
1208 if (err)
1209 {
1210 ERR( "heap %p, block %p: %s\n", heap, block, err );
1211 if (TRACE_ON(heap)) heap_dump( heap );
1212 }
1213
1214 return !err;
1215 }
1216
1217
1218 static BOOL validate_used_block( const struct heap *heap, const SUBHEAP *subheap, const struct block *block,
1219 unsigned int expected_block_type )
1220 {
1221 const char *err = NULL, *base = subheap_base( subheap ), *commit_end = subheap_commit_end( subheap );
1222 DWORD flags = heap->flags;
1223 const struct block *next;
1224 int i;
1225
1226 if ((ULONG_PTR)(block + 1) % BLOCK_ALIGN)
1227 err = "invalid block BLOCK_ALIGN";
1228 else if (block_get_type( block ) != BLOCK_TYPE_USED && block_get_type( block ) != BLOCK_TYPE_DEAD)
1229 err = "invalid block header";
1230 else if (expected_block_type && block_get_type( block ) != expected_block_type)
1231 err = "invalid block type";
1232 else if (block_get_flags( block ) & BLOCK_FLAG_FREE)
1233 err = "invalid block flags";
1234 else if (!contains( base, commit_end - base, block, block_get_size( block ) ))
1235 err = "invalid block size";
1236 else if (block->tail_size > block_get_size( block ) - sizeof(*block))
1237 err = "invalid block unused size";
1238 else if ((next = next_block( subheap, block )) && (block_get_flags( next ) & BLOCK_FLAG_PREV_FREE) &&
1239 /* LFH blocks do not use BLOCK_FLAG_PREV_FREE or back pointer */
1240 !(block_get_flags( block ) & BLOCK_FLAG_LFH))
1241 err = "invalid next block flags";
1242 else if (block_get_flags( block ) & BLOCK_FLAG_PREV_FREE)
1243 {
1244 const struct block *prev = *((struct block **)block - 1);
1245 if (!is_valid_free_block( heap, prev ))
1246 err = "invalid previous block pointer";
1247 else if (!(block_get_flags( prev ) & BLOCK_FLAG_FREE) || block_get_type( prev ) != BLOCK_TYPE_FREE)
1248 err = "invalid previous block flags";
1249 if ((char *)prev + block_get_size( prev ) != (char *)block)
1250 err = "invalid previous block size";
1251 }
1252
1253 if (!err && block_get_type( block ) == BLOCK_TYPE_DEAD)
1254 {
1255 const char *ptr = (char *)(block + 1), *end = (char *)block + block_get_size( block );
1256 while (!err && ptr < end)
1257 {
1258 if (*(DWORD *)ptr != BLOCK_FILL_FREE) err = "free block overwritten";
1259 ptr += sizeof(DWORD);
1260 }
1261 }
1262 else if (!err && (flags & HEAP_TAIL_CHECKING_ENABLED))
1263 {
1264 const unsigned char *tail = (unsigned char *)block + block_get_size( block ) - block->tail_size;
1265 for (i = 0; !err && i < BLOCK_ALIGN; i++) if (tail[i] != BLOCK_FILL_TAIL) err = "invalid block tail";
1266 }
1267
1268 if (err)
1269 {
1270 ERR( "heap %p, block %p: %s\n", heap, block, err );
1271 if (TRACE_ON(heap)) heap_dump( heap );
1272 }
1273
1274 return !err;
1275 }
1276
1277
1278 static BOOL heap_validate_ptr( const struct heap *heap, const void *ptr )
1279 {
1280 const struct block *block = (struct block *)ptr - 1;
1281 const SUBHEAP *subheap;
1282
1283 if (!(subheap = find_subheap( heap, block, FALSE )))
1284 {
1285 if (!find_large_block( heap, block ))
1286 {
1287 WARN("heap %p, ptr %p: block region not found\n", heap, ptr );
1288 return FALSE;
1289 }
1290
1291 return validate_large_block( heap, block );
1292 }
1293
1294 return validate_used_block( heap, subheap, block, BLOCK_TYPE_USED );
1295 }
1296
1297 static BOOL heap_validate( const struct heap *heap )
1298 {
1299 const ARENA_LARGE *large_arena;
1300 const struct block *block;
1301 const SUBHEAP *subheap;
1302
1303 LIST_FOR_EACH_ENTRY( subheap, &heap->subheap_list, SUBHEAP, entry )
1304 {
1305 if (!check_subheap( subheap, heap ))
1306 {
1307 ERR( "heap %p, subheap %p corrupted sizes or user_value\n", heap, subheap );
1308 if (TRACE_ON(heap)) heap_dump( heap );
1309 return FALSE;
1310 }
1311
1312 for (block = first_block( subheap ); block; block = next_block( subheap, block ))
1313 {
1314 if (block_get_flags( block ) & BLOCK_FLAG_FREE)
1315 {
1316 if (!validate_free_block( heap, subheap, block )) return FALSE;
1317 }
1318 else
1319 {
1320 if (!validate_used_block( heap, subheap, block, 0 )) return FALSE;
1321 }
1322 }
1323 }
1324
1325 if (heap->pending_free)
1326 {
1327 unsigned int i;
1328
1329 for (i = 0; i < MAX_FREE_PENDING; i++)
1330 {
1331 if (!(block = heap->pending_free[i])) break;
1332
1333 subheap = find_subheap( heap, block, FALSE );
1334 if (!subheap)
1335 {
1336 ERR( "heap %p: cannot find valid subheap for delayed freed block %p\n", heap, block );
1337 if (TRACE_ON(heap)) heap_dump( heap );
1338 return FALSE;
1339 }
1340
1341 if (!validate_used_block( heap, subheap, block, BLOCK_TYPE_DEAD )) return FALSE;
1342 }
1343
1344 for (; i < MAX_FREE_PENDING; i++)
1345 {
1346 if ((block = heap->pending_free[i]))
1347 {
1348 ERR( "heap %p: unexpected delayed freed block %p at slot %u\n", heap, block, i );
1349 if (TRACE_ON(heap)) heap_dump( heap );
1350 return FALSE;
1351 }
1352 }
1353 }
1354
1355 LIST_FOR_EACH_ENTRY( large_arena, &heap->large_list, ARENA_LARGE, entry )
1356 if (!validate_large_block( heap, &large_arena->block )) return FALSE;
1357
1358 return TRUE;
1359 }
1360
1361 static inline struct block *unsafe_block_from_ptr( struct heap *heap, ULONG flags, const void *ptr )
1362 {
1363 struct block *block = (struct block *)ptr - 1;
1364 const char *err = NULL;
1365 SUBHEAP *subheap;
1366
1367 if (flags & HEAP_VALIDATE)
1368 {
1369 heap_lock( heap, flags );
1370 if (!heap_validate_ptr( heap, ptr )) block = NULL;
1371 heap_unlock( heap, flags );
1372 return block;
1373 }
1374
1375 if ((ULONG_PTR)ptr % BLOCK_ALIGN)
1376 err = "invalid ptr alignment";
1377 else if (block_get_type( block ) == BLOCK_TYPE_DEAD)
1378 err = "delayed freed block";
1379 else if (block_get_type( block ) == BLOCK_TYPE_FREE)
1380 err = "already freed block";
1381 else if (block_get_flags( block ) & BLOCK_FLAG_LFH)
1382 {
1383 /* LFH block base_offset points to the group, not the subheap */
1384 if (block_get_type( block ) != BLOCK_TYPE_USED)
1385 err = "invalid block type";
1386 }
1387 else if ((subheap = block_get_subheap( heap, block )) >= (SUBHEAP *)block)
1388 err = "invalid base offset";
1389 else if (block_get_type( block ) == BLOCK_TYPE_USED)
1390 {
1391 const char *base = subheap_base( subheap ), *commit_end = subheap_commit_end( subheap );
1392 if (subheap->user_value != heap) err = "mismatching heap";
1393 else if (!contains( base, commit_end - base, block, block_get_size( block ) )) err = "invalid block size";
1394 }
1395 else if (block_get_type( block ) == BLOCK_TYPE_LARGE)
1396 {
1397 ARENA_LARGE *large = subheap_base( subheap );
1398 if (block != &large->block) err = "invalid large block";
1399 }
1400 else
1401 {
1402 err = "invalid block type";
1403 }
1404
1405 if (err) WARN( "heap %p, block %p: %s\n", heap, block, err );
1406 return err ? NULL : block;
1407 }
1408
1409 static DWORD heap_flags_from_global_flag( DWORD flag )
1410 {
1411 DWORD ret = 0;
1412
1413 if (flag & FLG_HEAP_ENABLE_TAIL_CHECK)
1414 ret |= HEAP_TAIL_CHECKING_ENABLED;
1415 if (flag & FLG_HEAP_ENABLE_FREE_CHECK)
1416 ret |= HEAP_FREE_CHECKING_ENABLED;
1417 if (flag & FLG_HEAP_VALIDATE_PARAMETERS)
1418 ret |= HEAP_VALIDATE_PARAMS | HEAP_TAIL_CHECKING_ENABLED | HEAP_FREE_CHECKING_ENABLED;
1419 if (flag & FLG_HEAP_VALIDATE_ALL)
1420 ret |= HEAP_VALIDATE_ALL | HEAP_TAIL_CHECKING_ENABLED | HEAP_FREE_CHECKING_ENABLED;
1421 if (flag & FLG_HEAP_DISABLE_COALESCING)
1422 ret |= HEAP_DISABLE_COALESCE_ON_FREE;
1423 if (flag & FLG_HEAP_PAGE_ALLOCS)
1424 ret |= HEAP_PAGE_ALLOCS;
1425
1426 return ret;
1427 }
1428
1429 /***********************************************************************
1430 * heap_set_debug_flags
1431 */
1432 static void heap_set_debug_flags( HANDLE handle )
1433 {
1434 ULONG global_flags = RtlGetNtGlobalFlags();
1435 DWORD dummy, flags, force_flags;
1436 struct heap *heap;
1437
1438 if (TRACE_ON(heap)) global_flags |= FLG_HEAP_VALIDATE_ALL;
1439 if (WARN_ON(heap)) global_flags |= FLG_HEAP_VALIDATE_PARAMETERS;
1440
1441 heap = unsafe_heap_from_handle( handle, 0, &dummy );
1442 flags = heap_flags_from_global_flag( global_flags );
1443 force_flags = (heap->flags | flags) & ~(HEAP_SHARED|HEAP_DISABLE_COALESCE_ON_FREE);
1444
1445 if (global_flags & FLG_HEAP_ENABLE_TAGGING) flags |= HEAP_SHARED;
1446 if (!(global_flags & FLG_HEAP_PAGE_ALLOCS)) force_flags &= ~(HEAP_GROWABLE|HEAP_PRIVATE);
1447
1448 if (RUNNING_ON_VALGRIND) flags = 0; /* no sense in validating since Valgrind catches accesses */
1449
1450 heap->flags |= flags;
1451 heap->force_flags |= force_flags;
1452
1453 if (flags & (HEAP_FREE_CHECKING_ENABLED | HEAP_TAIL_CHECKING_ENABLED)) /* fix existing blocks */
1454 {
1455 struct block *block;
1456 SUBHEAP *subheap;
1457
1458 LIST_FOR_EACH_ENTRY( subheap, &heap->subheap_list, SUBHEAP, entry )
1459 {
1460 const char *commit_end = subheap_commit_end( subheap );
1461
1462 if (!check_subheap( subheap, heap )) break;
1463
1464 for (block = first_block( subheap ); block; block = next_block( subheap, block ))
1465 {
1466 if (block_get_flags( block ) & BLOCK_FLAG_FREE)
1467 {
1468 char *data = (char *)block + block_get_overhead( block ), *end = (char *)block + block_get_size( block );
1469 if (next_block( subheap, block )) end -= sizeof(struct block *);
1470 if (end > commit_end) mark_block_free( data, commit_end - data, flags );
1471 else mark_block_free( data, end - data, flags );
1472 }
1473 else
1474 {
1475 if (block_get_type( block ) == BLOCK_TYPE_DEAD) mark_block_free( block + 1, block_get_size( block ) - sizeof(*block), flags );
1476 else mark_block_tail( block, flags );
1477 }
1478 }
1479 }
1480 }
1481
1482 if ((heap->flags & HEAP_GROWABLE) && !heap->pending_free &&
1483 ((flags & HEAP_FREE_CHECKING_ENABLED) || RUNNING_ON_VALGRIND))
1484 {
1485 heap->pending_free = RtlAllocateHeap( handle, HEAP_ZERO_MEMORY,
1486 MAX_FREE_PENDING * sizeof(*heap->pending_free) );
1487 heap->pending_pos = 0;
1488 }
1489 }
1490
1491
1492 /***********************************************************************
1493 * RtlCreateHeap (NTDLL.@)
1494 *
1495 * Create a new Heap.
1496 *
1497 * PARAMS
1498 * flags [I] HEAP_ flags from "winnt.h"
1499 * addr [I] Desired base address
1500 * totalSize [I] Total size of the heap, or 0 for a growable heap
1501 * commitSize [I] Amount of heap space to commit
1502 * unknown [I] Not yet understood
1503 * definition [I] Heap definition
1504 *
1505 * RETURNS
1506 * Success: A HANDLE to the newly created heap.
1507 * Failure: a NULL HANDLE.
1508 */
1509 HANDLE WINAPI RtlCreateHeap( ULONG flags, void *addr, SIZE_T total_size, SIZE_T commit_size,
1510 void *unknown, RTL_HEAP_DEFINITION *definition )
1511 {
1512 struct entry *entry;
1513 struct heap *heap;
1514 SIZE_T block_size;
1515 SUBHEAP *subheap;
1516 unsigned int i;
1517
1518 TRACE( "flags %#lx, addr %p, total_size %#Ix, commit_size %#Ix, unknown %p, definition %p\n",
1519 flags, addr, total_size, commit_size, unknown, definition );
1520
1521 flags &= ~(HEAP_TAIL_CHECKING_ENABLED|HEAP_FREE_CHECKING_ENABLED);
1522 if (process_heap) flags |= HEAP_PRIVATE;
1523 if (!process_heap || !total_size || (flags & HEAP_SHARED)) flags |= HEAP_GROWABLE;
1524 if (!total_size) total_size = commit_size + HEAP_INITIAL_SIZE;
1525
1526 if (!(heap = addr))
1527 {
1528 if (!commit_size) commit_size = REGION_ALIGN;
1529 total_size = min( max( total_size, commit_size ), 0xffff0000 ); /* don't allow a heap larger than 4GB */
1530 commit_size = min( total_size, ROUND_SIZE( commit_size, REGION_ALIGN - 1 ) );
1531 if (!(heap = allocate_region( NULL, flags, &total_size, &commit_size ))) return 0;
1532 }
1533
1534 heap->ffeeffee = 0xffeeffee;
1535 heap->auto_flags = (flags & HEAP_GROWABLE);
1536 heap->flags = (flags & ~HEAP_SHARED);
1537 heap->compat_info = HEAP_STD;
1538 heap->magic = HEAP_MAGIC;
1539 heap->grow_size = HEAP_INITIAL_GROW_SIZE;
1540 heap->min_size = commit_size;
1541 list_init( &heap->subheap_list );
1542 list_init( &heap->large_list );
1543
1544 list_init( &heap->free_lists[0].entry );
1545 for (i = 0, entry = heap->free_lists; i < FREE_LIST_COUNT; i++, entry++)
1546 {
1547 block_set_flags( &entry->block, ~0, BLOCK_FLAG_FREE_LINK );
1548 block_set_size( &entry->block, 0 );
1549 block_set_type( &entry->block, BLOCK_TYPE_FREE );
1550 block_set_base( &entry->block, heap );
1551 if (i) list_add_after( &entry[-1].entry, &entry->entry );
1552 }
1553
1554 if (!process_heap) /* do it by hand to avoid memory allocations */
1555 {
1556 heap->cs.DebugInfo = &process_heap_cs_debug;
1557 heap->cs.LockCount = -1;
1558 heap->cs.RecursionCount = 0;
1559 heap->cs.OwningThread = 0;
1560 heap->cs.LockSemaphore = 0;
1561 heap->cs.SpinCount = 0;
1562 process_heap_cs_debug.CriticalSection = &heap->cs;
1563 }
1564 else
1565 {
1566 RtlInitializeCriticalSection( &heap->cs );
1567 heap->cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": heap.cs");
1568 }
1569
1570 subheap = &heap->subheap;
1571 subheap->user_value = heap;
1572 subheap_set_bounds( subheap, (char *)heap + commit_size, (char *)heap + total_size );
1573 block_size = (SIZE_T)ROUND_ADDR( subheap_size( subheap ) - subheap_overhead( subheap ), BLOCK_ALIGN - 1 );
1574 block_init_free( first_block( subheap ), flags, subheap, block_size );
1575
1576 insert_free_block( heap, flags, subheap, first_block( subheap ) );
1577 list_add_head( &heap->subheap_list, &subheap->entry );
1578
1579 heap_set_debug_flags( heap );
1580
1581 if (heap->flags & HEAP_GROWABLE)
1582 {
1583 SIZE_T size = (sizeof(struct bin) + sizeof(struct group *) * ARRAY_SIZE(affinity_mapping)) * BLOCK_SIZE_BIN_COUNT;
1584 NtAllocateVirtualMemory( NtCurrentProcess(), (void *)&heap->bins,
1585 0, &size, MEM_COMMIT, PAGE_READWRITE );
1586
1587 for (i = 0; heap->bins && i < BLOCK_SIZE_BIN_COUNT; ++i)
1588 {
1589 RtlInitializeSListHead( &heap->bins[i].groups );
1590 /* offset affinity_group_base to interleave the bin affinity group pointers */
1591 heap->bins[i].affinity_group_base = (struct group **)(heap->bins + BLOCK_SIZE_BIN_COUNT) + i;
1592 }
1593 }
1594
1595 /* link it into the per-process heap list */
1596 if (process_heap)
1597 {
1598 RtlEnterCriticalSection( &process_heap->cs );
1599 list_add_head( &process_heap->entry, &heap->entry );
1600 RtlLeaveCriticalSection( &process_heap->cs );
1601 }
1602 else if (!addr)
1603 {
1604 process_heap = heap; /* assume the first heap we create is the process main heap */
1605 list_init( &process_heap->entry );
1606 }
1607
1608 return heap;
1609 }
1610
1611
1612 /***********************************************************************
1613 * RtlDestroyHeap (NTDLL.@)
1614 *
1615 * Destroy a Heap created with RtlCreateHeap().
1616 *
1617 * PARAMS
1618 * heap [I] Heap to destroy.
1619 *
1620 * RETURNS
1621 * Success: A NULL HANDLE, if heap is NULL or it was destroyed
1622 * Failure: The Heap handle, if heap is the process heap.
1623 */
1624 HANDLE WINAPI RtlDestroyHeap( HANDLE handle )
1625 {
1626 SUBHEAP *subheap, *next;
1627 ARENA_LARGE *arena, *arena_next;
1628 struct block **pending, **tmp;
1629 struct heap *heap;
1630 ULONG heap_flags;
1631 SIZE_T size;
1632 void *addr;
1633
1634 TRACE( "handle %p\n", handle );
1635
1636 if (!(heap = unsafe_heap_from_handle( handle, 0, &heap_flags )) && handle &&
1637 (((struct heap *)handle)->flags & HEAP_VALIDATE_PARAMS) &&
1638 NtCurrentTeb()->Peb->BeingDebugged)
1639 {
1640 DbgPrint( "Attempt to destroy an invalid heap\n" );
1641 DbgBreakPoint();
1642 }
1643 if (!heap) return handle;
1644
1645 if ((pending = heap->pending_free))
1646 {
1647 heap->pending_free = NULL;
1648 for (tmp = pending; *tmp && tmp != pending + MAX_FREE_PENDING; ++tmp)
1649 {
1650 if (!heap_free_block_lfh( heap, heap->flags, *tmp )) continue;
1651 heap_free_block( heap, heap->flags, *tmp );
1652 }
1653 RtlFreeHeap( handle, 0, pending );
1654 }
1655
1656 if (heap == process_heap) return handle; /* cannot delete the main process heap */
1657
1658 /* remove it from the per-process list */
1659 RtlEnterCriticalSection( &process_heap->cs );
1660 list_remove( &heap->entry );
1661 RtlLeaveCriticalSection( &process_heap->cs );
1662
1663 heap->cs.DebugInfo->Spare[0] = 0;
1664 RtlDeleteCriticalSection( &heap->cs );
1665
1666 LIST_FOR_EACH_ENTRY_SAFE( arena, arena_next, &heap->large_list, ARENA_LARGE, entry )
1667 {
1668 list_remove( &arena->entry );
1669 size = 0;
1670 addr = arena;
1671 NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE );
1672 }
1673 LIST_FOR_EACH_ENTRY_SAFE( subheap, next, &heap->subheap_list, SUBHEAP, entry )
1674 {
1675 if (subheap == &heap->subheap) continue; /* do this one last */
1676 valgrind_notify_free_all( subheap, heap );
1677 list_remove( &subheap->entry );
1678 size = 0;
1679 addr = ROUND_ADDR( subheap, REGION_ALIGN - 1 );
1680 NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE );
1681 }
1682 valgrind_notify_free_all( &heap->subheap, heap );
1683 if ((addr = heap->bins))
1684 {
1685 size = 0;
1686 NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE );
1687 }
1688 size = 0;
1689 addr = heap;
1690 NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE );
1691 return 0;
1692 }
1693
1694 static SIZE_T heap_get_block_size( const struct heap *heap, ULONG flags, SIZE_T size )
1695 {
1696 static const ULONG padd_flags = HEAP_VALIDATE | HEAP_VALIDATE_ALL | HEAP_VALIDATE_PARAMS | HEAP_ADD_USER_INFO;
1697 static const ULONG check_flags = HEAP_TAIL_CHECKING_ENABLED | HEAP_FREE_CHECKING_ENABLED | HEAP_CHECKING_ENABLED;
1698 SIZE_T overhead, block_size;
1699
1700 if ((flags & check_flags)) overhead = BLOCK_ALIGN;
1701 else overhead = sizeof(struct block);
1702
1703 if ((flags & HEAP_TAIL_CHECKING_ENABLED) || RUNNING_ON_VALGRIND) overhead += BLOCK_ALIGN;
1704 if (flags & padd_flags) overhead += BLOCK_ALIGN;
1705
1706 if (size < BLOCK_ALIGN) size = BLOCK_ALIGN;
1707 block_size = ROUND_SIZE( size + overhead, BLOCK_ALIGN - 1 );
1708
1709 if (block_size < size) return ~0U; /* overflow */
1710 if (block_size < HEAP_MIN_BLOCK_SIZE) block_size = HEAP_MIN_BLOCK_SIZE;
1711 return block_size;
1712 }
1713
1714 static NTSTATUS heap_allocate_block( struct heap *heap, ULONG flags, SIZE_T block_size, SIZE_T size, void **ret )
1715 {
1716 struct block *block, *next;
1717 SIZE_T old_block_size;
1718 SUBHEAP *subheap;
1719
1720 /* Locate a suitable free block */
1721
1722 if (!(block = find_free_block( heap, flags, block_size ))) return STATUS_NO_MEMORY;
1723 /* read the free block size, changing block type or flags may alter it */
1724 old_block_size = block_get_size( block );
1725 subheap = block_get_subheap( heap, block );
1726
1727 if ((next = split_block( heap, flags, block, old_block_size, block_size )))
1728 {
1729 block_init_free( next, flags, subheap, old_block_size - block_size );
1730 insert_free_block( heap, flags, subheap, next );
1731 }
1732
1733 block_set_type( block, BLOCK_TYPE_USED );
1734 block_set_flags( block, ~0, BLOCK_USER_FLAGS( flags ) );
1735 block->tail_size = block_get_size( block ) - sizeof(*block) - size;
1736 initialize_block( block, 0, size, flags );
1737 mark_block_tail( block, flags );
1738
1739 if ((next = next_block( subheap, block ))) block_set_flags( next, BLOCK_FLAG_PREV_FREE, 0 );
1740
1741 *ret = block + 1;
1742 return STATUS_SUCCESS;
1743 }
1744
1745 /* Low Fragmentation Heap frontend */
1746
1747 /* header for every LFH block group */
1748 struct DECLSPEC_ALIGN(BLOCK_ALIGN) group
1749 {
1750 SLIST_ENTRY entry;
1751 /* one bit for each free block and the highest bit for GROUP_FLAG_FREE */
1752 LONG free_bits;
1753 /* affinity of the thread which last allocated from this group */
1754 LONG affinity;
1755 /* first block of a group, required for alignment */
1756 struct block first_block;
1757 };
1758
1759 #define GROUP_BLOCK_COUNT (sizeof(((struct group *)0)->free_bits) * 8 - 1)
1760 #define GROUP_FLAG_FREE (1u << GROUP_BLOCK_COUNT)
1761
1762 static inline UINT block_get_group_index( const struct block *block )
1763 {
1764 return block->base_offset;
1765 }
1766
1767 static inline struct group *block_get_group( const struct block *block )
1768 {
1769 SIZE_T block_size = block_get_size( block );
1770 void *first_block = (char *)block - block_get_group_index( block ) * block_size;
1771 return CONTAINING_RECORD( first_block, struct group, first_block );
1772 }
1773
1774 static inline void block_set_group( struct block *block, SIZE_T block_size, const struct group *group )
1775 {
1776 SIZE_T offset = (char *)block - (char *)&group->first_block;
1777 block->base_offset = offset / block_size;
1778 }
1779
1780 static inline struct block *group_get_block( struct group *group, SIZE_T block_size, UINT index )
1781 {
1782 char *first_block = (char *)&group->first_block;
1783 return (struct block *)(first_block + index * block_size);
1784 }
1785
1786 /* lookup a free block using the group free_bits, the current thread must own the group */
1787 static inline struct block *group_find_free_block( struct group *group, SIZE_T block_size )
1788 {
1789 ULONG i, free_bits = ReadNoFence( &group->free_bits );
1790 /* free_bits will never be 0 as the group is unlinked when it's fully used */
1791 BitScanForward( &i, free_bits );
1792 InterlockedAnd( &group->free_bits, ~(1 << i) );
1793 return group_get_block( group, block_size, i );
1794 }
1795
1796 /* allocate a new group block using non-LFH allocation, returns a group owned by current thread */
1797 static struct group *group_allocate( struct heap *heap, ULONG flags, SIZE_T block_size )
1798 {
1799 SIZE_T i, group_size, group_block_size;
1800 struct group *group;
1801 NTSTATUS status;
1802
1803 group_size = offsetof( struct group, first_block ) + GROUP_BLOCK_COUNT * block_size;
1804 group_block_size = heap_get_block_size( heap, flags, group_size );
1805
1806 heap_lock( heap, flags );
1807
1808 if (group_block_size >= HEAP_MIN_LARGE_BLOCK_SIZE)
1809 status = heap_allocate_large( heap, flags & ~HEAP_ZERO_MEMORY, group_block_size, group_size, (void **)&group );
1810 else
1811 status = heap_allocate_block( heap, flags & ~HEAP_ZERO_MEMORY, group_block_size, group_size, (void **)&group );
1812
1813 heap_unlock( heap, flags );
1814
1815 if (status) return NULL;
1816
1817 block_set_flags( (struct block *)group - 1, 0, BLOCK_FLAG_LFH );
1818 group->free_bits = ~GROUP_FLAG_FREE;
1819
1820 for (i = 0; i < GROUP_BLOCK_COUNT; ++i)
1821 {
1822 struct block *block = group_get_block( group, block_size, i );
1823 valgrind_make_writable( block, sizeof(*block) );
1824 block_set_type( block, BLOCK_TYPE_FREE );
1825 block_set_flags( block, ~0, BLOCK_FLAG_FREE | BLOCK_FLAG_LFH );
1826 block_set_group( block, block_size, group );
1827 block_set_size( block, block_size );
1828 mark_block_free( block + 1, (char *)block + block_size - (char *)(block + 1), flags );
1829 }
1830
1831 return group;
1832 }
1833
1834 /* release a fully freed group to the non-LFH subheap, group must be owned by current thread */
1835 static NTSTATUS group_release( struct heap *heap, ULONG flags, struct bin *bin, struct group *group )
1836 {
1837 struct block *block = (struct block *)group - 1;
1838 NTSTATUS status;
1839
1840 heap_lock( heap, flags );
1841
1842 block_set_flags( block, BLOCK_FLAG_LFH, 0 );
1843
1844 if (block_get_flags( block ) & BLOCK_FLAG_LARGE)
1845 status = heap_free_large( heap, flags, block );
1846 else
1847 status = heap_free_block( heap, flags, block );
1848
1849 heap_unlock( heap, flags );
1850
1851 return status;
1852 }
1853
1854 static inline ULONG heap_current_thread_affinity(void)
1855 {
1856 ULONG affinity;
1857
1858 if (!(affinity = NtCurrentTeb()->HeapVirtualAffinity))
1859 {
1860 affinity = InterlockedIncrement( &next_thread_affinity );
1861 affinity = affinity_mapping[affinity % ARRAY_SIZE(affinity_mapping)];
1862 NtCurrentTeb()->HeapVirtualAffinity = affinity;
1863 }
1864
1865 return affinity;
1866 }
1867
1868 /* acquire a group from the bin, thread takes ownership of a shared group or allocates a new one */
1869 static struct group *heap_acquire_bin_group( struct heap *heap, ULONG flags, SIZE_T block_size, struct bin *bin )
1870 {
1871 ULONG affinity = NtCurrentTeb()->HeapVirtualAffinity;
1872 struct group *group;
1873 SLIST_ENTRY *entry;
1874
1875 if ((group = InterlockedExchangePointer( (void *)bin_get_affinity_group( bin, affinity ), NULL )))
1876 return group;
1877
1878 if ((entry = RtlInterlockedPopEntrySList( &bin->groups )))
1879 return CONTAINING_RECORD( entry, struct group, entry );
1880
1881 return group_allocate( heap, flags, block_size );
1882 }
1883
1884 /* release a thread owned and fully freed group to the bin shared group, or free its memory */
1885 static NTSTATUS heap_release_bin_group( struct heap *heap, ULONG flags, struct bin *bin, struct group *group )
1886 {
1887 ULONG affinity = group->affinity;
1888
1889 /* using InterlockedExchangePointer here would possibly return a group that has used blocks,
1890 * we prefer keeping our fully freed group instead for reduced memory consumption.
1891 */
1892 if (!InterlockedCompareExchangePointer( (void *)bin_get_affinity_group( bin, affinity ), group, NULL ))
1893 return STATUS_SUCCESS;
1894
1895 /* try re-using the block group instead of releasing it */
1896 if (RtlQueryDepthSList( &bin->groups ) <= ARRAY_SIZE(affinity_mapping))
1897 {
1898 RtlInterlockedPushEntrySList( &bin->groups, &group->entry );
1899 return STATUS_SUCCESS;
1900 }
1901
1902 return group_release( heap, flags, bin, group );
1903 }
1904
1905 static struct block *find_free_bin_block( struct heap *heap, ULONG flags, SIZE_T block_size, struct bin *bin )
1906 {
1907 ULONG affinity = heap_current_thread_affinity();
1908 struct block *block;
1909 struct group *group;
1910
1911 /* acquire a group, the thread will own it and no other thread can clear free bits.
1912 * some other thread might still set the free bits if they are freeing blocks.
1913 */
1914 if (!(group = heap_acquire_bin_group( heap, flags, block_size, bin ))) return NULL;
1915 group->affinity = affinity;
1916
1917 block = group_find_free_block( group, block_size );
1918
1919 /* serialize with heap_free_block_lfh: atomically set GROUP_FLAG_FREE when the free bits are all 0. */
1920 if (ReadNoFence( &group->free_bits ) || InterlockedCompareExchange( &group->free_bits, GROUP_FLAG_FREE, 0 ))
1921 {
1922 /* if GROUP_FLAG_FREE isn't set, thread is responsible for putting it back into group list. */
1923 if ((group = InterlockedExchangePointer( (void *)bin_get_affinity_group( bin, affinity ), group )))
1924 RtlInterlockedPushEntrySList( &bin->groups, &group->entry );
1925 }
1926
1927 return block;
1928 }
1929
1930 static NTSTATUS heap_allocate_block_lfh( struct heap *heap, ULONG flags, SIZE_T block_size,
1931 SIZE_T size, void **ret )
1932 {
1933 struct bin *bin, *last = heap->bins + BLOCK_SIZE_BIN_COUNT - 1;
1934 struct block *block;
1935
1936 bin = heap->bins + BLOCK_SIZE_BIN( block_size );
1937 if (bin == last) return STATUS_UNSUCCESSFUL;
1938
1939 /* paired with WriteRelease in bin_try_enable. */
1940 if (!ReadAcquire( &bin->enabled )) return STATUS_UNSUCCESSFUL;
1941
1942 block_size = BLOCK_BIN_SIZE( BLOCK_SIZE_BIN( block_size ) );
1943
1944 if ((block = find_free_bin_block( heap, flags, block_size, bin )))
1945 {
1946 block_set_type( block, BLOCK_TYPE_USED );
1947 block_set_flags( block, ~BLOCK_FLAG_LFH, BLOCK_USER_FLAGS( flags ) );
1948 block->tail_size = block_size - sizeof(*block) - size;
1949 initialize_block( block, 0, size, flags );
1950 mark_block_tail( block, flags );
1951 *ret = block + 1;
1952 }
1953
1954 return block ? STATUS_SUCCESS : STATUS_NO_MEMORY;
1955 }
1956
1957 static NTSTATUS heap_free_block_lfh( struct heap *heap, ULONG flags, struct block *block )
1958 {
1959 struct bin *bin, *last = heap->bins + BLOCK_SIZE_BIN_COUNT - 1;
1960 SIZE_T i, block_size = block_get_size( block );
1961 struct group *group = block_get_group( block );
1962 NTSTATUS status = STATUS_SUCCESS;
1963
1964 if (!(block_get_flags( block ) & BLOCK_FLAG_LFH)) return STATUS_UNSUCCESSFUL;
1965
1966 bin = heap->bins + BLOCK_SIZE_BIN( block_size );
1967 if (bin == last) return STATUS_UNSUCCESSFUL;
1968
1969 i = block_get_group_index( block );
1970 valgrind_make_writable( block, sizeof(*block) );
1971 block_set_type( block, BLOCK_TYPE_FREE );
1972 block_set_flags( block, ~BLOCK_FLAG_LFH, BLOCK_FLAG_FREE );
1973 mark_block_free( block + 1, (char *)block + block_size - (char *)(block + 1), flags );
1974
1975 /* if this was the last used block in a group and GROUP_FLAG_FREE was set */
1976 if (InterlockedOr( &group->free_bits, 1 << i ) == ~(1 << i))
1977 {
1978 /* thread now owns the group, and can release it to its bin */
1979 group->free_bits = ~GROUP_FLAG_FREE;
1980 status = heap_release_bin_group( heap, flags, bin, group );
1981 }
1982
1983 return status;
1984 }
1985
1986 static void bin_try_enable( struct heap *heap, struct bin *bin )
1987 {
1988 ULONG alloc = ReadNoFence( &bin->count_alloc ), freed = ReadNoFence( &bin->count_freed );
1989 SIZE_T block_size = BLOCK_BIN_SIZE( bin - heap->bins );
1990 BOOL enable = FALSE;
1991
1992 if (bin == heap->bins && alloc > 0x10) enable = TRUE;
1993 else if (bin - heap->bins < 0x30 && alloc > 0x800) enable = TRUE;
1994 else if (bin - heap->bins < 0x30 && alloc - freed > 0x10) enable = TRUE;
1995 else if (alloc - freed > 0x400000 / block_size) enable = TRUE;
1996 if (!enable) return;
1997
1998 if (ReadNoFence( &heap->compat_info ) != HEAP_LFH)
1999 {
2000 ULONG info = HEAP_LFH;
2001 RtlSetHeapInformation( heap, HeapCompatibilityInformation, &info, sizeof(info) );
2002 }
2003
2004 /* paired with ReadAcquire in heap_allocate_block_lfh.
2005 *
2006 * The acq/rel barrier on the enabled flag is protecting compat_info
2007 * (i.e. compat_info := LFH happens-before enabled := TRUE), so that
2008 * a caller that observes LFH block allocation (alloc request
2009 * succeeds without heap lock) will never observe HEAP_STD when it
2010 * queries the heap.
2011 */
2012 WriteRelease( &bin->enabled, TRUE );
2013 }
2014
2015 static void heap_thread_detach_bin_groups( struct heap *heap )
2016 {
2017 ULONG i, affinity = NtCurrentTeb()->HeapVirtualAffinity;
2018
2019 if (!heap->bins) return;
2020
2021 for (i = 0; i < BLOCK_SIZE_BIN_COUNT; ++i)
2022 {
2023 struct bin *bin = heap->bins + i;
2024 struct group *group;
2025 if (!(group = InterlockedExchangePointer( (void *)bin_get_affinity_group( bin, affinity ), NULL ))) continue;
2026 RtlInterlockedPushEntrySList( &bin->groups, &group->entry );
2027 }
2028 }
2029
2030 void heap_thread_detach(void)
2031 {
2032 struct heap *heap;
2033
2034 RtlEnterCriticalSection( &process_heap->cs );
2035
2036 LIST_FOR_EACH_ENTRY( heap, &process_heap->entry, struct heap, entry )
2037 heap_thread_detach_bin_groups( heap );
2038
2039 heap_thread_detach_bin_groups( process_heap );
2040
2041 RtlLeaveCriticalSection( &process_heap->cs );
2042 }
2043
2044 /***********************************************************************
2045 * RtlAllocateHeap (NTDLL.@)
2046 */
2047 void *WINAPI DECLSPEC_HOTPATCH RtlAllocateHeap( HANDLE handle, ULONG flags, SIZE_T size )
2048 {
2049 struct heap *heap;
2050 SIZE_T block_size;
2051 void *ptr = NULL;
2052 ULONG heap_flags;
2053 NTSTATUS status;
2054
2055 heap = unsafe_heap_from_handle( handle, flags, &heap_flags );
2056 if ((block_size = heap_get_block_size( heap, heap_flags, size )) == ~0U)
2057 status = STATUS_NO_MEMORY;
2058 else if (block_size >= HEAP_MIN_LARGE_BLOCK_SIZE)
2059 status = heap_allocate_large( heap, heap_flags, block_size, size, &ptr );
2060 else if (heap->bins && !heap_allocate_block_lfh( heap, heap_flags, block_size, size, &ptr ))
2061 status = STATUS_SUCCESS;
2062 else
2063 {
2064 heap_lock( heap, heap_flags );
2065 status = heap_allocate_block( heap, heap_flags, block_size, size, &ptr );
2066 heap_unlock( heap, heap_flags );
2067
2068 if (!status && heap->bins)
2069 {
2070 SIZE_T bin = BLOCK_SIZE_BIN( block_get_size( (struct block *)ptr - 1 ) );
2071 InterlockedIncrement( &heap->bins[bin].count_alloc );
2072 if (!ReadNoFence( &heap->bins[bin].enabled )) bin_try_enable( heap, &heap->bins[bin] );
2073 }
2074 }
2075
2076 if (!status) valgrind_notify_alloc( ptr, size, flags & HEAP_ZERO_MEMORY );
2077
2078 TRACE( "handle %p, flags %#lx, size %#Ix, return %p, status %#lx.\n", handle, flags, size, ptr, status );
2079 heap_set_status( heap, flags, status );
2080 return ptr;
2081 }
2082
2083
2084 /***********************************************************************
2085 * RtlFreeHeap (NTDLL.@)
2086 */
2087 BOOLEAN WINAPI DECLSPEC_HOTPATCH RtlFreeHeap( HANDLE handle, ULONG flags, void *ptr )
2088 {
2089 struct block *block;
2090 struct heap *heap;
2091 ULONG heap_flags;
2092 NTSTATUS status;
2093
2094 if (!ptr) return TRUE;
2095
2096 valgrind_notify_free( ptr );
2097
2098 if (!(heap = unsafe_heap_from_handle( handle, flags, &heap_flags )))
2099 status = STATUS_INVALID_PARAMETER;
2100 else if (!(block = unsafe_block_from_ptr( heap, heap_flags, ptr )))
2101 status = STATUS_INVALID_PARAMETER;
2102 else if (block_get_flags( block ) & BLOCK_FLAG_LARGE)
2103 status = heap_free_large( heap, heap_flags, block );
2104 else if (!(block = heap_delay_free( heap, heap_flags, block )))
2105 status = STATUS_SUCCESS;
2106 else if (!heap_free_block_lfh( heap, heap_flags, block ))
2107 status = STATUS_SUCCESS;
2108 else
2109 {
2110 SIZE_T block_size = block_get_size( block ), bin = BLOCK_SIZE_BIN( block_size );
2111
2112 heap_lock( heap, heap_flags );
2113 status = heap_free_block( heap, heap_flags, block );
2114 heap_unlock( heap, heap_flags );
2115
2116 if (!status && heap->bins) InterlockedIncrement( &heap->bins[bin].count_freed );
2117 }
2118
2119 TRACE( "handle %p, flags %#lx, ptr %p, return %u, status %#lx.\n", handle, flags, ptr, !status, status );
2120 heap_set_status( heap, flags, status );
2121 return !status;
2122 }
2123
2124 static NTSTATUS heap_resize_large( struct heap *heap, ULONG flags, struct block *block, SIZE_T block_size,
2125 SIZE_T size, SIZE_T *old_size, void **ret )
2126 {
2127 ARENA_LARGE *large = CONTAINING_RECORD( block, ARENA_LARGE, block );
2128 SIZE_T old_block_size = large->block_size;
2129 *old_size = large->data_size;
2130
2131 if (old_block_size < block_size) return STATUS_NO_MEMORY;
2132
2133 /* FIXME: we could remap zero-pages instead */
2134 valgrind_notify_resize( block + 1, *old_size, size );
2135 initialize_block( block, *old_size, size, flags );
2136
2137 large->data_size = size;
2138 valgrind_make_noaccess( (char *)block + sizeof(*block) + large->data_size,
2139 old_block_size - sizeof(*block) - large->data_size );
2140
2141 *ret = block + 1;
2142 return STATUS_SUCCESS;
2143 }
2144
2145 static NTSTATUS heap_resize_block( struct heap *heap, ULONG flags, struct block *block, SIZE_T block_size,
2146 SIZE_T size, SIZE_T old_block_size, SIZE_T *old_size, void **ret )
2147 {
2148 SUBHEAP *subheap = block_get_subheap( heap, block );
2149 struct block *next;
2150
2151 if (block_size > old_block_size)
2152 {
2153 /* need to grow block, make sure it's followed by large enough free block */
2154 if (!(next = next_block( subheap, block ))) return STATUS_NO_MEMORY;
2155 if (!(block_get_flags( next ) & BLOCK_FLAG_FREE)) return STATUS_NO_MEMORY;
2156 if (block_size > old_block_size + block_get_size( next )) return STATUS_NO_MEMORY;
2157 if (!subheap_commit( heap, subheap, block, block_size )) return STATUS_NO_MEMORY;
2158 }
2159
2160 if ((next = next_block( subheap, block )) && (block_get_flags( next ) & BLOCK_FLAG_FREE))
2161 {
2162 /* merge with next block if it is free */
2163 struct entry *entry = (struct entry *)next;
2164 list_remove( &entry->entry );
2165 old_block_size += block_get_size( next );
2166 }
2167
2168 if ((next = split_block( heap, flags, block, old_block_size, block_size )))
2169 {
2170 block_init_free( next, flags, subheap, old_block_size - block_size );
2171 insert_free_block( heap, flags, subheap, next );
2172 }
2173
2174 valgrind_notify_resize( block + 1, *old_size, size );
2175 block_set_flags( block, BLOCK_FLAG_USER_MASK & ~BLOCK_FLAG_USER_INFO, BLOCK_USER_FLAGS( flags ) );
2176 block->tail_size = block_get_size( block ) - sizeof(*block) - size;
2177 initialize_block( block, *old_size, size, flags );
2178 mark_block_tail( block, flags );
2179
2180 if ((next = next_block( subheap, block ))) block_set_flags( next, BLOCK_FLAG_PREV_FREE, 0 );
2181
2182 *ret = block + 1;
2183 return STATUS_SUCCESS;
2184 }
2185
2186 static NTSTATUS heap_resize_block_lfh( struct block *block, ULONG flags, SIZE_T block_size, SIZE_T size, SIZE_T *old_size, void **ret )
2187 {
2188 /* as native LFH does it with different block size: refuse to resize even though we could */
2189 if (ROUND_SIZE( *old_size, BLOCK_ALIGN - 1) != ROUND_SIZE( size, BLOCK_ALIGN - 1)) return STATUS_NO_MEMORY;
2190 if (size >= *old_size) return STATUS_NO_MEMORY;
2191
2192 block_set_flags( block, BLOCK_FLAG_USER_MASK & ~BLOCK_FLAG_USER_INFO, BLOCK_USER_FLAGS( flags ) );
2193 block->tail_size = block_size - sizeof(*block) - size;
2194 initialize_block( block, *old_size, size, flags );
2195 mark_block_tail( block, flags );
2196
2197 *ret = block + 1;
2198 return STATUS_SUCCESS;
2199 }
2200
2201 static NTSTATUS heap_resize_in_place( struct heap *heap, ULONG flags, struct block *block, SIZE_T block_size,
2202 SIZE_T size, SIZE_T *old_size, void **ret )
2203 {
2204 SIZE_T old_bin, old_block_size;
2205 NTSTATUS status;
2206
2207 if (block_get_flags( block ) & BLOCK_FLAG_LARGE)
2208 return heap_resize_large( heap, flags, block, block_size, size, old_size, ret );
2209
2210 old_block_size = block_get_size( block );
2211 *old_size = old_block_size - block_get_overhead( block );
2212 old_bin = BLOCK_SIZE_BIN( old_block_size );
2213
2214 if (block_size >= HEAP_MIN_LARGE_BLOCK_SIZE) return STATUS_NO_MEMORY; /* growing small block to large block */
2215
2216 if (block_get_flags( block ) & BLOCK_FLAG_LFH)
2217 return heap_resize_block_lfh( block, flags, block_size, size, old_size, ret );
2218
2219 heap_lock( heap, flags );
2220 status = heap_resize_block( heap, flags, block, block_size, size, old_block_size, old_size, ret );
2221 heap_unlock( heap, flags );
2222
2223 if (!status && heap->bins)
2224 {
2225 SIZE_T new_bin = BLOCK_SIZE_BIN( block_size );
2226 InterlockedIncrement( &heap->bins[old_bin].count_freed );
2227 InterlockedIncrement( &heap->bins[new_bin].count_alloc );
2228 if (!ReadNoFence( &heap->bins[new_bin].enabled )) bin_try_enable( heap, &heap->bins[new_bin] );
2229 }
2230
2231 return status;
2232 }
2233
2234 /***********************************************************************
2235 * RtlReAllocateHeap (NTDLL.@)
2236 */
2237 void *WINAPI RtlReAllocateHeap( HANDLE handle, ULONG flags, void *ptr, SIZE_T size )
2238 {
2239 SIZE_T block_size, old_size;
2240 struct block *block;
2241 struct heap *heap;
2242 ULONG heap_flags;
2243 void *ret = NULL;
2244 NTSTATUS status;
2245
2246 if (!ptr) return NULL;
2247
2248 if (!(heap = unsafe_heap_from_handle( handle, flags, &heap_flags )))
2249 status = STATUS_INVALID_HANDLE;
2250 else if ((block_size = heap_get_block_size( heap, heap_flags, size )) == ~0U)
2251 status = STATUS_NO_MEMORY;
2252 else if (!(block = unsafe_block_from_ptr( heap, heap_flags, ptr )))
2253 status = STATUS_INVALID_PARAMETER;
2254 else if ((status = heap_resize_in_place( heap, heap_flags, block, block_size, size,
2255 &old_size, &ret )))
2256 {
2257 if (flags & HEAP_REALLOC_IN_PLACE_ONLY)
2258 status = STATUS_NO_MEMORY;
2259 else if (!(ret = RtlAllocateHeap( heap, flags, size )))
2260 status = STATUS_NO_MEMORY;
2261 else
2262 {
2263 memcpy( ret, ptr, min( size, old_size ) );
2264 RtlFreeHeap( heap, flags, ptr );
2265 status = STATUS_SUCCESS;
2266 }
2267 }
2268
2269 TRACE( "handle %p, flags %#lx, ptr %p, size %#Ix, return %p, status %#lx.\n", handle, flags, ptr, size, ret, status );
2270 heap_set_status( heap, flags, status );
2271 return ret;
2272 }
2273
2274
2275 /***********************************************************************
2276 * RtlCompactHeap (NTDLL.@)
2277 *
2278 * Compact the free space in a Heap.
2279 *
2280 * PARAMS
2281 * heap [I] Heap that block was allocated from
2282 * flags [I] HEAP_ flags from "winnt.h"
2283 *
2284 * RETURNS
2285 * The number of bytes compacted.
2286 *
2287 * NOTES
2288 * This function is a harmless stub.
2289 */
2290 ULONG WINAPI RtlCompactHeap( HANDLE handle, ULONG flags )
2291 {
2292 static BOOL reported;
2293 if (!reported++) FIXME( "handle %p, flags %#lx stub!\n", handle, flags );
2294 return 0;
2295 }
2296
2297
2298 /***********************************************************************
2299 * RtlLockHeap (NTDLL.@)
2300 *
2301 * Lock a Heap.
2302 *
2303 * PARAMS
2304 * heap [I] Heap to lock
2305 *
2306 * RETURNS
2307 * Success: TRUE. The Heap is locked.
2308 * Failure: FALSE, if heap is invalid.
2309 */
2310 BOOLEAN WINAPI RtlLockHeap( HANDLE handle )
2311 {
2312 struct heap *heap;
2313 ULONG heap_flags;
2314 if (!(heap = unsafe_heap_from_handle( handle, 0, &heap_flags ))) return FALSE;
2315 heap_lock( heap, heap_flags );
2316 return TRUE;
2317 }
2318
2319
2320 /***********************************************************************
2321 * RtlUnlockHeap (NTDLL.@)
2322 *
2323 * Unlock a Heap.
2324 *
2325 * PARAMS
2326 * heap [I] Heap to unlock
2327 *
2328 * RETURNS
2329 * Success: TRUE. The Heap is unlocked.
2330 * Failure: FALSE, if heap is invalid.
2331 */
2332 BOOLEAN WINAPI RtlUnlockHeap( HANDLE handle )
2333 {
2334 struct heap *heap;
2335 ULONG heap_flags;
2336 if (!(heap = unsafe_heap_from_handle( handle, 0, &heap_flags ))) return FALSE;
2337 heap_unlock( heap, heap_flags );
2338 return TRUE;
2339 }
2340
2341
2342 static NTSTATUS heap_size( const struct heap *heap, struct block *block, SIZE_T *size )
2343 {
2344 if (block_get_flags( block ) & BLOCK_FLAG_LARGE)
2345 {
2346 const ARENA_LARGE *large_arena = CONTAINING_RECORD( block, ARENA_LARGE, block );
2347 *size = large_arena->data_size;
2348 }
2349 else *size = block_get_size( block ) - block_get_overhead( block );
2350
2351 return STATUS_SUCCESS;
2352 }
2353
2354 /***********************************************************************
2355 * RtlSizeHeap (NTDLL.@)
2356 */
2357 SIZE_T WINAPI RtlSizeHeap( HANDLE handle, ULONG flags, const void *ptr )
2358 {
2359 SIZE_T size = ~(SIZE_T)0;
2360 struct block *block;
2361 struct heap *heap;
2362 ULONG heap_flags;
2363 NTSTATUS status;
2364
2365 if (!(heap = unsafe_heap_from_handle( handle, flags, &heap_flags )))
2366 status = STATUS_INVALID_PARAMETER;
2367 else if (!(block = unsafe_block_from_ptr( heap, heap_flags, ptr )))
2368 status = STATUS_INVALID_PARAMETER;
2369 else
2370 {
2371 heap_lock( heap, heap_flags );
2372 status = heap_size( heap, block, &size );
2373 heap_unlock( heap, heap_flags );
2374 }
2375
2376 TRACE( "handle %p, flags %#lx, ptr %p, return %#Ix, status %#lx.\n", handle, flags, ptr, size, status );
2377 heap_set_status( heap, flags, status );
2378 return size;
2379 }
2380
2381
2382 /***********************************************************************
2383 * RtlValidateHeap (NTDLL.@)
2384 */
2385 BOOLEAN WINAPI RtlValidateHeap( HANDLE handle, ULONG flags, const void *ptr )
2386 {
2387 struct heap *heap;
2388 ULONG heap_flags;
2389 BOOLEAN ret;
2390
2391 if (!(heap = unsafe_heap_from_handle( handle, flags, &heap_flags )))
2392 ret = FALSE;
2393 else
2394 {
2395 heap_lock( heap, heap_flags );
2396 if (ptr) ret = heap_validate_ptr( heap, ptr );
2397 else ret = heap_validate( heap );
2398 heap_unlock( heap, heap_flags );
2399 }
2400
2401 TRACE( "handle %p, flags %#lx, ptr %p, return %u.\n", handle, flags, ptr, !!ret );
2402 return ret;
2403 }
2404
2405 static NTSTATUS heap_walk_blocks( const struct heap *heap, const SUBHEAP *subheap,
2406 const struct block *block, struct rtl_heap_entry *entry )
2407 {
2408 const char *base = subheap_base( subheap ), *commit_end = subheap_commit_end( subheap ), *end = base + subheap_size( subheap );
2409 const struct block *blocks = first_block( subheap );
2410
2411 if (entry->lpData == commit_end) return STATUS_NO_MORE_ENTRIES;
2412 if (entry->lpData == base) block = blocks;
2413 else if (!(block = next_block( subheap, block )))
2414 {
2415 entry->lpData = (void *)commit_end;
2416 entry->cbData = end - commit_end;
2417 entry->cbOverhead = 0;
2418 entry->iRegionIndex = 0;
2419 entry->wFlags = RTL_HEAP_ENTRY_UNCOMMITTED;
2420 return STATUS_SUCCESS;
2421 }
2422
2423 if (block_get_flags( block ) & BLOCK_FLAG_FREE)
2424 {
2425 entry->lpData = (char *)block + block_get_overhead( block );
2426 entry->cbData = block_get_size( block ) - block_get_overhead( block );
2427 /* FIXME: last free block should not include uncommitted range, which also has its own overhead */
2428 if (!contains( blocks, commit_end - 4 * BLOCK_ALIGN - (char *)blocks, block, block_get_size( block ) ))
2429 entry->cbData = commit_end - 4 * BLOCK_ALIGN - (char *)entry->lpData;
2430 entry->cbOverhead = 2 * BLOCK_ALIGN;
2431 entry->iRegionIndex = 0;
2432 entry->wFlags = 0;
2433 }
2434 else
2435 {
2436 entry->lpData = (void *)(block + 1);
2437 entry->cbData = block_get_size( block ) - block_get_overhead( block );
2438 entry->cbOverhead = block_get_overhead( block );
2439 entry->iRegionIndex = 0;
2440 entry->wFlags = RTL_HEAP_ENTRY_COMMITTED|RTL_HEAP_ENTRY_BLOCK|RTL_HEAP_ENTRY_BUSY;
2441 }
2442
2443 return STATUS_SUCCESS;
2444 }
2445
2446 static NTSTATUS heap_walk( const struct heap *heap, struct rtl_heap_entry *entry )
2447 {
2448 const char *data = entry->lpData;
2449 const ARENA_LARGE *large = NULL;
2450 const struct block *block;
2451 const struct list *next;
2452 const SUBHEAP *subheap;
2453 NTSTATUS status;
2454 char *base;
2455
2456 if (!data || entry->wFlags & RTL_HEAP_ENTRY_REGION) block = (struct block *)data;
2457 else if (entry->wFlags & RTL_HEAP_ENTRY_BUSY) block = (struct block *)data - 1;
2458 else block = (struct block *)(data - sizeof(struct list)) - 1;
2459
2460 if (find_large_block( heap, block ))
2461 {
2462 large = CONTAINING_RECORD( block, ARENA_LARGE, block );
2463 next = &large->entry;
2464 }
2465 else if ((subheap = find_subheap( heap, block, TRUE )))
2466 {
2467 if (!(status = heap_walk_blocks( heap, subheap, block, entry ))) return STATUS_SUCCESS;
2468 else if (status != STATUS_NO_MORE_ENTRIES) return status;
2469 next = &subheap->entry;
2470 }
2471 else
2472 {
2473 if (entry->lpData) return STATUS_INVALID_PARAMETER;
2474 next = &heap->subheap_list;
2475 }
2476
2477 if (!large && (next = list_next( &heap->subheap_list, next )))
2478 {
2479 subheap = LIST_ENTRY( next, SUBHEAP, entry );
2480 base = subheap_base( subheap );
2481 entry->lpData = base;
2482 entry->cbData = subheap_overhead( subheap );
2483 entry->cbOverhead = 0;
2484 entry->iRegionIndex = 0;
2485 entry->wFlags = RTL_HEAP_ENTRY_REGION;
2486 entry->Region.dwCommittedSize = (char *)subheap_commit_end( subheap ) - base;
2487 entry->Region.dwUnCommittedSize = subheap_size( subheap ) - entry->Region.dwCommittedSize;
2488 entry->Region.lpFirstBlock = base + entry->cbData;
2489 entry->Region.lpLastBlock = base + subheap_size( subheap );
2490 return STATUS_SUCCESS;
2491 }
2492
2493 if (!next) next = &heap->large_list;
2494 if ((next = list_next( &heap->large_list, next )))
2495 {
2496 large = LIST_ENTRY( next, ARENA_LARGE, entry );
2497 entry->lpData = (void *)(large + 1);
2498 entry->cbData = large->data_size;
2499 entry->cbOverhead = 0;
2500 entry->iRegionIndex = 64;
2501 entry->wFlags = RTL_HEAP_ENTRY_COMMITTED|RTL_HEAP_ENTRY_BLOCK|RTL_HEAP_ENTRY_BUSY;
2502 return STATUS_SUCCESS;
2503 }
2504
2505 return STATUS_NO_MORE_ENTRIES;
2506 }
2507
2508 /***********************************************************************
2509 * RtlWalkHeap (NTDLL.@)
2510 */
2511 NTSTATUS WINAPI RtlWalkHeap( HANDLE handle, void *entry_ptr )
2512 {
2513 struct rtl_heap_entry *entry = entry_ptr;
2514 struct heap *heap;
2515 ULONG heap_flags;
2516 NTSTATUS status;
2517
2518 if (!entry) return STATUS_INVALID_PARAMETER;
2519
2520 if (!(heap = unsafe_heap_from_handle( handle, 0, &heap_flags )))
2521 status = STATUS_INVALID_HANDLE;
2522 else
2523 {
2524 heap_lock( heap, heap_flags );
2525 status = heap_walk( heap, entry );
2526 heap_unlock( heap, heap_flags );
2527 }
2528
2529 TRACE( "handle %p, entry %p %s, return %#lx\n", handle, entry,
2530 status ? "<empty>" : debugstr_heap_entry(entry), status );
2531 return status;
2532 }
2533
2534
2535 /***********************************************************************
2536 * RtlGetProcessHeaps (NTDLL.@)
2537 *
2538 * Get the Heaps belonging to the current process.
2539 *
2540 * PARAMS
2541 * count [I] size of heaps
2542 * heaps [O] Destination array for heap HANDLE's
2543 *
2544 * RETURNS
2545 * Success: The number of Heaps allocated by the process.
2546 * Failure: 0.
2547 */
2548 ULONG WINAPI RtlGetProcessHeaps( ULONG count, HANDLE *heaps )
2549 {
2550 ULONG total = 1; /* main heap */
2551 struct list *ptr;
2552
2553 RtlEnterCriticalSection( &process_heap->cs );
2554 LIST_FOR_EACH( ptr, &process_heap->entry ) total++;
2555 if (total <= count)
2556 {
2557 *heaps++ = process_heap;
2558 LIST_FOR_EACH( ptr, &process_heap->entry )
2559 *heaps++ = LIST_ENTRY( ptr, struct heap, entry );
2560 }
2561 RtlLeaveCriticalSection( &process_heap->cs );
2562 return total;
2563 }
2564
2565 /***********************************************************************
2566 * RtlQueryHeapInformation (NTDLL.@)
2567 */
2568 NTSTATUS WINAPI RtlQueryHeapInformation( HANDLE handle, HEAP_INFORMATION_CLASS info_class,
2569 void *info, SIZE_T size_in, SIZE_T *size_out )
2570 {
2571 struct heap *heap;
2572 ULONG flags;
2573
2574 TRACE( "handle %p, info_class %u, info %p, size_in %Iu, size_out %p.\n", handle, info_class, info, size_in, size_out );
2575
2576 switch (info_class)
2577 {
2578 case HeapCompatibilityInformation:
2579 if (!(heap = unsafe_heap_from_handle( handle, 0, &flags ))) return STATUS_ACCESS_VIOLATION;
2580 if (size_out) *size_out = sizeof(ULONG);
2581 if (size_in < sizeof(ULONG)) return STATUS_BUFFER_TOO_SMALL;
2582 *(ULONG *)info = ReadNoFence( &heap->compat_info );
2583 return STATUS_SUCCESS;
2584
2585 default:
2586 FIXME( "HEAP_INFORMATION_CLASS %u not implemented!\n", info_class );
2587 return STATUS_INVALID_INFO_CLASS;
2588 }
2589 }
2590
2591 /***********************************************************************
2592 * RtlSetHeapInformation (NTDLL.@)
2593 */
2594 NTSTATUS WINAPI RtlSetHeapInformation( HANDLE handle, HEAP_INFORMATION_CLASS info_class, void *info, SIZE_T size )
2595 {
2596 struct heap *heap;
2597 ULONG flags;
2598
2599 TRACE( "handle %p, info_class %u, info %p, size %Iu.\n", handle, info_class, info, size );
2600
2601 switch (info_class)
2602 {
2603 case HeapCompatibilityInformation:
2604 {
2605 ULONG compat_info;
2606
2607 if (size < sizeof(ULONG)) return STATUS_BUFFER_TOO_SMALL;
2608 if (!(heap = unsafe_heap_from_handle( handle, 0, &flags ))) return STATUS_INVALID_HANDLE;
2609 if (heap->flags & HEAP_NO_SERIALIZE) return STATUS_INVALID_PARAMETER;
2610
2611 compat_info = *(ULONG *)info;
2612 if (compat_info != HEAP_STD && compat_info != HEAP_LFH)
2613 {
2614 FIXME( "HeapCompatibilityInformation %lu not implemented!\n", compat_info );
2615 return STATUS_UNSUCCESSFUL;
2616 }
2617 if (InterlockedCompareExchange( &heap->compat_info, compat_info, HEAP_STD ) != HEAP_STD)
2618 return STATUS_UNSUCCESSFUL;
2619 return STATUS_SUCCESS;
2620 }
2621
2622 default:
2623 FIXME( "HEAP_INFORMATION_CLASS %u not implemented!\n", info_class );
2624 return STATUS_SUCCESS;
2625 }
2626 }
2627
2628 /***********************************************************************
2629 * RtlGetUserInfoHeap (NTDLL.@)
2630 */
2631 BOOLEAN WINAPI RtlGetUserInfoHeap( HANDLE handle, ULONG flags, void *ptr, void **user_value, ULONG *user_flags )
2632 {
2633 NTSTATUS status = STATUS_SUCCESS;
2634 struct block *block;
2635 struct heap *heap;
2636 ULONG heap_flags;
2637 char *tmp;
2638
2639 TRACE( "handle %p, flags %#lx, ptr %p, user_value %p, user_flags %p semi-stub!\n",
2640 handle, flags, ptr, user_value, user_flags );
2641
2642 *user_flags = 0;
2643
2644 if (!(heap = unsafe_heap_from_handle( handle, flags, &heap_flags )))
2645 status = STATUS_SUCCESS;
2646 else if (!(block = unsafe_block_from_ptr( heap, heap_flags, ptr )))
2647 {
2648 status = STATUS_INVALID_PARAMETER;
2649 *user_value = 0;
2650 }
2651 else if (!(*user_flags = HEAP_USER_FLAGS(block_get_flags( block ))))
2652 WARN( "Block %p wasn't allocated with user info\n", ptr );
2653 else if (block_get_flags( block ) & BLOCK_FLAG_LARGE)
2654 {
2655 const ARENA_LARGE *large = CONTAINING_RECORD( block, ARENA_LARGE, block );
2656 *user_flags = *user_flags & ~HEAP_ADD_USER_INFO;
2657 *user_value = large->user_value;
2658 }
2659 else
2660 {
2661 heap_lock( heap, heap_flags );
2662
2663 tmp = (char *)block + block_get_size( block ) - block->tail_size + sizeof(void *);
2664 if ((heap_flags & HEAP_TAIL_CHECKING_ENABLED) || RUNNING_ON_VALGRIND) tmp += BLOCK_ALIGN;
2665 *user_flags = *user_flags & ~HEAP_ADD_USER_INFO;
2666 *user_value = *(void **)tmp;
2667
2668 heap_unlock( heap, heap_flags );
2669 }
2670
2671 heap_set_status( heap, flags, status );
2672 return !status;
2673 }
2674
2675 /***********************************************************************
2676 * RtlSetUserValueHeap (NTDLL.@)
2677 */
2678 BOOLEAN WINAPI RtlSetUserValueHeap( HANDLE handle, ULONG flags, void *ptr, void *user_value )
2679 {
2680 struct block *block;
2681 struct heap *heap;
2682 ULONG heap_flags;
2683 BOOLEAN ret;
2684 char *tmp;
2685
2686 TRACE( "handle %p, flags %#lx, ptr %p, user_value %p.\n", handle, flags, ptr, user_value );
2687
2688 if (!(heap = unsafe_heap_from_handle( handle, flags, &heap_flags )))
2689 ret = TRUE;
2690 else if (!(block = unsafe_block_from_ptr( heap, heap_flags, ptr )))
2691 ret = FALSE;
2692 else if (!(block_get_flags( block ) & BLOCK_FLAG_USER_INFO))
2693 ret = FALSE;
2694 else if (block_get_flags( block ) & BLOCK_FLAG_LARGE)
2695 {
2696 ARENA_LARGE *large = CONTAINING_RECORD( block, ARENA_LARGE, block );
2697 large->user_value = user_value;
2698 ret = TRUE;
2699 }
2700 else
2701 {
2702 heap_lock( heap, heap_flags );
2703
2704 tmp = (char *)block + block_get_size( block ) - block->tail_size + sizeof(void *);
2705 if ((heap_flags & HEAP_TAIL_CHECKING_ENABLED) || RUNNING_ON_VALGRIND) tmp += BLOCK_ALIGN;
2706 *(void **)tmp = user_value;
2707 ret = TRUE;
2708
2709 heap_unlock( heap, heap_flags );
2710 }
2711
2712 return ret;
2713 }
2714
2715 /***********************************************************************
2716 * RtlSetUserFlagsHeap (NTDLL.@)
2717 */
2718 BOOLEAN WINAPI RtlSetUserFlagsHeap( HANDLE handle, ULONG flags, void *ptr, ULONG clear, ULONG set )
2719 {
2720 struct block *block;
2721 struct heap *heap;
2722 ULONG heap_flags;
2723 BOOLEAN ret;
2724
2725 TRACE( "handle %p, flags %#lx, ptr %p, clear %#lx, set %#lx.\n", handle, flags, ptr, clear, set );
2726
2727 if ((clear | set) & ~(0xe00))
2728 {
2729 SetLastError( ERROR_INVALID_PARAMETER );
2730 return FALSE;
2731 }
2732
2733 if (!(heap = unsafe_heap_from_handle( handle, flags, &heap_flags )))
2734 ret = TRUE;
2735 else if (!(block = unsafe_block_from_ptr( heap, heap_flags, ptr )))
2736 ret = FALSE;
2737 else if (!(block_get_flags( block ) & BLOCK_FLAG_USER_INFO))
2738 ret = FALSE;
2739 else
2740 {
2741 block_set_flags( block, BLOCK_USER_FLAGS( clear ), BLOCK_USER_FLAGS( set ) );
2742 ret = TRUE;
2743 }
2744
2745 return ret;
2746 }
Windows API implementation