MMHeap.cpp@ 8847

Last change on this file since 8847 was 8797, checked in by vboxsync, 17 years ago
New DBGF interface for digging into the guts of the guest OS kernel.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 21.9 KB

Line
1	/* $Id: MMHeap.cpp 8797 2008-05-13 23:16:03Z vboxsync $ */
2	/** @file
3	* MM - Memory Monitor(/Manager) - Heap.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#define LOG_GROUP LOG_GROUP_MM_HEAP
27	#include <VBox/mm.h>
28	#include <VBox/stam.h>
29	#include <VBox/pgm.h>
30	#include "MMInternal.h"
31	#include <VBox/vm.h>
32	#include <VBox/uvm.h>
33	#include <VBox/err.h>
34	#include <VBox/param.h>
35	#include <VBox/log.h>
36
37	#include <iprt/alloc.h>
38	#include <iprt/assert.h>
39	#include <iprt/string.h>
40
41
42	/*******************************************************************************
43	* Internal Functions *
44	*******************************************************************************/
45	static void *mmR3HeapAlloc(PMMHEAP pHeap, MMTAG enmTag, size_t cbSize, bool fZero);
46
47
48
49	/**
50	* Allocate and initialize a heap structure and it's associated substructures.
51	*
52	* @returns VBox status.
53	* @param pVM The handle to the VM the heap should be associated with.
54	* @param ppHeap Where to store the heap pointer.
55	*/
56	int mmR3HeapCreateU(PUVM pUVM, PMMHEAP *ppHeap)
57	{
58	PMMHEAP pHeap = (PMMHEAP)RTMemAllocZ(sizeof(MMHEAP) + sizeof(MMHEAPSTAT));
59	if (pHeap)
60	{
61	int rc = RTCritSectInit(&pHeap->Lock);
62	if (VBOX_SUCCESS(rc))
63	{
64	/*
65	* Initialize the global stat record.
66	*/
67	pHeap->pUVM = pUVM;
68	pHeap->Stat.pHeap = pHeap;
69	#ifdef MMR3HEAP_WITH_STATISTICS
70	PMMHEAPSTAT pStat = &pHeap->Stat;
71	STAMR3RegisterU(pUVM, &pStat->cAllocations, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/R3Heap/cAllocations", STAMUNIT_CALLS, "Number or MMR3HeapAlloc() calls.");
72	STAMR3RegisterU(pUVM, &pStat->cReallocations, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/R3Heap/cReallocations", STAMUNIT_CALLS, "Number of MMR3HeapRealloc() calls.");
73	STAMR3RegisterU(pUVM, &pStat->cFrees, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/R3Heap/cFrees", STAMUNIT_CALLS, "Number of MMR3HeapFree() calls.");
74	STAMR3RegisterU(pUVM, &pStat->cFailures, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/R3Heap/cFailures", STAMUNIT_COUNT, "Number of failures.");
75	STAMR3RegisterU(pUVM, &pStat->cbCurAllocated, sizeof(pStat->cbCurAllocated) == sizeof(uint32_t) ? STAMTYPE_U32 : STAMTYPE_U64,
76	STAMVISIBILITY_ALWAYS, "/MM/R3Heap/cbCurAllocated", STAMUNIT_BYTES, "Number of bytes currently allocated.");
77	STAMR3RegisterU(pUVM, &pStat->cbAllocated, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/R3Heap/cbAllocated", STAMUNIT_BYTES, "Total number of bytes allocated.");
78	STAMR3RegisterU(pUVM, &pStat->cbFreed, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, "/MM/R3Heap/cbFreed", STAMUNIT_BYTES, "Total number of bytes freed.");
79	#endif
80	*ppHeap = pHeap;
81	return VINF_SUCCESS;
82	}
83	AssertRC(rc);
84	RTMemFree(pHeap);
85	}
86	AssertMsgFailed(("failed to allocate heap structure\n"));
87	return VERR_NO_MEMORY;
88	}
89
90
91	/**
92	* Destroy a heap.
93	*
94	* @param pHeap Heap handle.
95	*/
96	void mmR3HeapDestroy(PMMHEAP pHeap)
97	{
98	/*
99	* Start by deleting the lock, that'll trap anyone
100	* attempting to use the heap.
101	*/
102	RTCritSectDelete(&pHeap->Lock);
103
104	/*
105	* Walk the node list and free all the memory.
106	*/
107	PMMHEAPHDR pHdr = pHeap->pHead;
108	while (pHdr)
109	{
110	void *pv = pHdr;
111	pHdr = pHdr->pNext;
112	RTMemFree(pv);
113	}
114
115	/*
116	* Free the stat nodes.
117	*/
118	/** @todo free all nodes in a AVL tree. */
119	RTMemFree(pHeap);
120	}
121
122
123	/**
124	* Allocate memory associating it with the VM for collective cleanup.
125	*
126	* The memory will be allocated from the default heap but a header
127	* is added in which we keep track of which VM it belongs to and chain
128	* all the allocations together so they can be freed in one go.
129	*
130	* This interface is typically used for memory block which will not be
131	* freed during the life of the VM.
132	*
133	* @returns Pointer to allocated memory.
134	* @param pUVM Pointer to the user mode VM structure.
135	* @param enmTag Statistics tag. Statistics are collected on a per tag
136	* basis in addition to a global one. Thus we can easily
137	* identify how memory is used by the VM.
138	* @param cbSize Size of the block.
139	*/
140	MMR3DECL(void *) MMR3HeapAllocU(PUVM pUVM, MMTAG enmTag, size_t cbSize)
141	{
142	Assert(pUVM->mm.s.pHeap);
143	return mmR3HeapAlloc(pUVM->mm.s.pHeap, enmTag, cbSize, false);
144	}
145
146
147	/**
148	* Allocate memory associating it with the VM for collective cleanup.
149	*
150	* The memory will be allocated from the default heap but a header
151	* is added in which we keep track of which VM it belongs to and chain
152	* all the allocations together so they can be freed in one go.
153	*
154	* This interface is typically used for memory block which will not be
155	* freed during the life of the VM.
156	*
157	* @returns Pointer to allocated memory.
158	* @param pVM VM handle.
159	* @param enmTag Statistics tag. Statistics are collected on a per tag
160	* basis in addition to a global one. Thus we can easily
161	* identify how memory is used by the VM.
162	* @param cbSize Size of the block.
163	*/
164	MMR3DECL(void *) MMR3HeapAlloc(PVM pVM, MMTAG enmTag, size_t cbSize)
165	{
166	return mmR3HeapAlloc(pVM->pUVM->mm.s.pHeap, enmTag, cbSize, false);
167	}
168
169
170	/**
171	* Same as MMR3HeapAllocU().
172	*
173	* @returns Pointer to allocated memory.
174	* @param pUVM Pointer to the user mode VM structure.
175	* @param enmTag Statistics tag. Statistics are collected on a per tag
176	* basis in addition to a global one. Thus we can easily
177	* identify how memory is used by the VM.
178	* @param cbSize Size of the block.
179	* @param ppv Where to store the pointer to the allocated memory on success.
180	*/
181	MMR3DECL(int) MMR3HeapAllocExU(PUVM pUVM, MMTAG enmTag, size_t cbSize, void **ppv)
182	{
183	Assert(pUVM->mm.s.pHeap);
184	void *pv = mmR3HeapAlloc(pUVM->mm.s.pHeap, enmTag, cbSize, false);
185	if (pv)
186	{
187	*ppv = pv;
188	return VINF_SUCCESS;
189	}
190	return VERR_NO_MEMORY;
191	}
192
193
194	/**
195	* Same as MMR3HeapAlloc().
196	*
197	* @returns Pointer to allocated memory.
198	* @param pVM VM handle.
199	* @param enmTag Statistics tag. Statistics are collected on a per tag
200	* basis in addition to a global one. Thus we can easily
201	* identify how memory is used by the VM.
202	* @param cbSize Size of the block.
203	* @param ppv Where to store the pointer to the allocated memory on success.
204	*/
205	MMR3DECL(int) MMR3HeapAllocEx(PVM pVM, MMTAG enmTag, size_t cbSize, void **ppv)
206	{
207	void *pv = mmR3HeapAlloc(pVM->pUVM->mm.s.pHeap, enmTag, cbSize, false);
208	if (pv)
209	{
210	*ppv = pv;
211	return VINF_SUCCESS;
212	}
213	return VERR_NO_MEMORY;
214	}
215
216
217	/**
218	* Same as MMR3HeapAlloc() only the memory is zeroed.
219	*
220	* @returns Pointer to allocated memory.
221	* @param pUVM Pointer to the user mode VM structure.
222	* @param enmTag Statistics tag. Statistics are collected on a per tag
223	* basis in addition to a global one. Thus we can easily
224	* identify how memory is used by the VM.
225	* @param cbSize Size of the block.
226	*/
227	MMR3DECL(void *) MMR3HeapAllocZU(PUVM pUVM, MMTAG enmTag, size_t cbSize)
228	{
229	return mmR3HeapAlloc(pUVM->mm.s.pHeap, enmTag, cbSize, true);
230	}
231
232
233	/**
234	* Same as MMR3HeapAlloc() only the memory is zeroed.
235	*
236	* @returns Pointer to allocated memory.
237	* @param pVM VM handle.
238	* @param enmTag Statistics tag. Statistics are collected on a per tag
239	* basis in addition to a global one. Thus we can easily
240	* identify how memory is used by the VM.
241	* @param cbSize Size of the block.
242	*/
243	MMR3DECL(void *) MMR3HeapAllocZ(PVM pVM, MMTAG enmTag, size_t cbSize)
244	{
245	return mmR3HeapAlloc(pVM->pUVM->mm.s.pHeap, enmTag, cbSize, true);
246	}
247
248
249	/**
250	* Same as MMR3HeapAllocZ().
251	*
252	* @returns Pointer to allocated memory.
253	* @param pUVM Pointer to the user mode VM structure.
254	* @param enmTag Statistics tag. Statistics are collected on a per tag
255	* basis in addition to a global one. Thus we can easily
256	* identify how memory is used by the VM.
257	* @param cbSize Size of the block.
258	* @param ppv Where to store the pointer to the allocated memory on success.
259	*/
260	MMR3DECL(int) MMR3HeapAllocZExU(PUVM pUVM, MMTAG enmTag, size_t cbSize, void **ppv)
261	{
262	Assert(pUVM->mm.s.pHeap);
263	void *pv = mmR3HeapAlloc(pUVM->mm.s.pHeap, enmTag, cbSize, true);
264	if (pv)
265	{
266	*ppv = pv;
267	return VINF_SUCCESS;
268	}
269	return VERR_NO_MEMORY;
270	}
271
272
273	/**
274	* Same as MMR3HeapAllocZ().
275	*
276	* @returns Pointer to allocated memory.
277	* @param pVM VM handle.
278	* @param enmTag Statistics tag. Statistics are collected on a per tag
279	* basis in addition to a global one. Thus we can easily
280	* identify how memory is used by the VM.
281	* @param cbSize Size of the block.
282	* @param ppv Where to store the pointer to the allocated memory on success.
283	*/
284	MMR3DECL(int) MMR3HeapAllocZEx(PVM pVM, MMTAG enmTag, size_t cbSize, void **ppv)
285	{
286	void *pv = mmR3HeapAlloc(pVM->pUVM->mm.s.pHeap, enmTag, cbSize, true);
287	if (pv)
288	{
289	*ppv = pv;
290	return VINF_SUCCESS;
291	}
292	return VERR_NO_MEMORY;
293	}
294
295
296	/**
297	* Allocate memory from the heap.
298	*
299	* @returns Pointer to allocated memory.
300	* @param pHeap Heap handle.
301	* @param enmTag Statistics tag. Statistics are collected on a per tag
302	* basis in addition to a global one. Thus we can easily
303	* identify how memory is used by the VM.
304	* @param cbSize Size of the block.
305	* @param fZero Whether or not to zero the memory block.
306	*/
307	void *mmR3HeapAlloc(PMMHEAP pHeap, MMTAG enmTag, size_t cbSize, bool fZero)
308	{
309	#ifdef MMR3HEAP_WITH_STATISTICS
310	RTCritSectEnter(&pHeap->Lock);
311
312	/*
313	* Find/alloc statistics nodes.
314	*/
315	pHeap->Stat.cAllocations++;
316	PMMHEAPSTAT pStat = (PMMHEAPSTAT)RTAvlULGet(&pHeap->pStatTree, (AVLULKEY)enmTag);
317	if (pStat)
318	{
319	pStat->cAllocations++;
320
321	RTCritSectLeave(&pHeap->Lock);
322	}
323	else
324	{
325	pStat = (PMMHEAPSTAT)RTMemAllocZ(sizeof(MMHEAPSTAT));
326	if (!pStat)
327	{
328	pHeap->Stat.cFailures++;
329	AssertMsgFailed(("Failed to allocate heap stat record.\n"));
330	RTCritSectLeave(&pHeap->Lock);
331	return NULL;
332	}
333	pStat->Core.Key = (AVLULKEY)enmTag;
334	pStat->pHeap = pHeap;
335	RTAvlULInsert(&pHeap->pStatTree, &pStat->Core);
336
337	pStat->cAllocations++;
338	RTCritSectLeave(&pHeap->Lock);
339
340	/* register the statistics */
341	PUVM pUVM = pHeap->pUVM;
342	char szName[80];
343	const char *pszTag = mmR3GetTagName(enmTag);
344	RTStrPrintf(szName, sizeof(szName), "/MM/R3Heap/%s/cAllocations", pszTag);
345	STAMR3RegisterU(pUVM, &pStat->cAllocations, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, szName, STAMUNIT_CALLS, "Number or MMR3HeapAlloc() calls.");
346
347	RTStrPrintf(szName, sizeof(szName), "/MM/R3Heap/%s/cReallocations", pszTag);
348	STAMR3RegisterU(pUVM, &pStat->cReallocations, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, szName, STAMUNIT_CALLS, "Number of MMR3HeapRealloc() calls.");
349
350	RTStrPrintf(szName, sizeof(szName), "/MM/R3Heap/%s/cFrees", pszTag);
351	STAMR3RegisterU(pUVM, &pStat->cFrees, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, szName, STAMUNIT_CALLS, "Number of MMR3HeapFree() calls.");
352
353	RTStrPrintf(szName, sizeof(szName), "/MM/R3Heap/%s/cFailures", pszTag);
354	STAMR3RegisterU(pUVM, &pStat->cFailures, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, szName, STAMUNIT_COUNT, "Number of failures.");
355
356	RTStrPrintf(szName, sizeof(szName), "/MM/R3Heap/%s/cbCurAllocated", pszTag);
357	STAMR3RegisterU(pUVM, &pStat->cbCurAllocated, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, szName, STAMUNIT_BYTES, "Number of bytes currently allocated.");
358
359	RTStrPrintf(szName, sizeof(szName), "/MM/R3Heap/%s/cbAllocated", pszTag);
360	STAMR3RegisterU(pUVM, &pStat->cbAllocated, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, szName, STAMUNIT_BYTES, "Total number of bytes allocated.");
361
362	RTStrPrintf(szName, sizeof(szName), "/MM/R3Heap/%s/cbFreed", pszTag);
363	STAMR3RegisterU(pUVM, &pStat->cbFreed, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, szName, STAMUNIT_BYTES, "Total number of bytes freed.");
364	}
365	#endif
366
367	/*
368	* Validate input.
369	*/
370	if (cbSize == 0)
371	{
372	#ifdef MMR3HEAP_WITH_STATISTICS
373	RTCritSectEnter(&pHeap->Lock);
374	pStat->cFailures++;
375	pHeap->Stat.cFailures++;
376	RTCritSectLeave(&pHeap->Lock);
377	#endif
378	return NULL;
379	}
380
381	/*
382	* Allocate heap block.
383	*/
384	cbSize = RT_ALIGN_Z(cbSize, MMR3HEAP_SIZE_ALIGNMENT) + sizeof(MMHEAPHDR);
385	PMMHEAPHDR pHdr = (PMMHEAPHDR)(fZero ? RTMemAllocZ(cbSize) : RTMemAlloc(cbSize));
386	if (!pHdr)
387	{
388	AssertMsgFailed(("Failed to allocate heap block %d, enmTag=%x(%.4s).\n", cbSize, enmTag, &enmTag));
389	#ifdef MMR3HEAP_WITH_STATISTICS
390	RTCritSectEnter(&pHeap->Lock);
391	pStat->cFailures++;
392	pHeap->Stat.cFailures++;
393	RTCritSectLeave(&pHeap->Lock);
394	#endif
395	return NULL;
396	}
397	Assert(!((uintptr_t)pHdr & (RTMEM_ALIGNMENT - 1)));
398
399	RTCritSectEnter(&pHeap->Lock);
400
401	/*
402	* Init and link in the header.
403	*/
404	pHdr->pNext = NULL;
405	pHdr->pPrev = pHeap->pTail;
406	if (pHdr->pPrev)
407	pHdr->pPrev->pNext = pHdr;
408	else
409	pHeap->pHead = pHdr;
410	pHeap->pTail = pHdr;
411	#ifdef MMR3HEAP_WITH_STATISTICS
412	pHdr->pStat = pStat;
413	#else
414	pHdr->pStat = &pHeap->Stat;
415	#endif
416	pHdr->cbSize = cbSize;
417
418	/*
419	* Update statistics
420	*/
421	#ifdef MMR3HEAP_WITH_STATISTICS
422	pStat->cbAllocated += cbSize;
423	pStat->cbCurAllocated += cbSize;
424	pHeap->Stat.cbAllocated += cbSize;
425	pHeap->Stat.cbCurAllocated += cbSize;
426	#endif
427
428	RTCritSectLeave(&pHeap->Lock);
429
430	return pHdr + 1;
431	}
432
433
434	/**
435	* Reallocate memory allocated with MMR3HeapAlloc() or MMR3HeapRealloc().
436	*
437	* @returns Pointer to reallocated memory.
438	* @param pv Pointer to the memory block to reallocate.
439	* Must not be NULL!
440	* @param cbNewSize New block size.
441	*/
442	MMR3DECL(void ) MMR3HeapRealloc(void pv, size_t cbNewSize)
443	{
444	AssertMsg(pv, ("Invalid pointer pv=%p\n", pv));
445	if (!pv)
446	return NULL;
447
448	/*
449	* If newsize is zero then this is a free.
450	*/
451	if (!cbNewSize)
452	{
453	MMR3HeapFree(pv);
454	return NULL;
455	}
456
457	/*
458	* Validate header.
459	*/
460	PMMHEAPHDR pHdr = (PMMHEAPHDR)pv - 1;
461	if ( pHdr->cbSize & (MMR3HEAP_SIZE_ALIGNMENT - 1)
462	\|\| (uintptr_t)pHdr & (RTMEM_ALIGNMENT - 1))
463	{
464	AssertMsgFailed(("Invalid heap header! pv=%p, size=%#x\n", pv, pHdr->cbSize));
465	return NULL;
466	}
467	Assert(pHdr->pStat != NULL);
468	Assert(!((uintptr_t)pHdr->pNext & (RTMEM_ALIGNMENT - 1)));
469	Assert(!((uintptr_t)pHdr->pPrev & (RTMEM_ALIGNMENT - 1)));
470
471	PMMHEAP pHeap = pHdr->pStat->pHeap;
472
473	#ifdef MMR3HEAP_WITH_STATISTICS
474	RTCritSectEnter(&pHeap->Lock);
475	pHdr->pStat->cReallocations++;
476	pHeap->Stat.cReallocations++;
477	RTCritSectLeave(&pHeap->Lock);
478	#endif
479
480	/*
481	* Rellocate the block.
482	*/
483	cbNewSize = RT_ALIGN_Z(cbNewSize, MMR3HEAP_SIZE_ALIGNMENT) + sizeof(MMHEAPHDR);
484	PMMHEAPHDR pHdrNew = (PMMHEAPHDR)RTMemRealloc(pHdr, cbNewSize);
485	if (!pHdrNew)
486	{
487	#ifdef MMR3HEAP_WITH_STATISTICS
488	RTCritSectEnter(&pHeap->Lock);
489	pHdr->pStat->cFailures++;
490	pHeap->Stat.cFailures++;
491	RTCritSectLeave(&pHeap->Lock);
492	#endif
493	return NULL;
494	}
495
496	/*
497	* Update pointers.
498	*/
499	if (pHdrNew != pHdr)
500	{
501	RTCritSectEnter(&pHeap->Lock);
502	if (pHdrNew->pPrev)
503	pHdrNew->pPrev->pNext = pHdrNew;
504	else
505	pHeap->pHead = pHdrNew;
506
507	if (pHdrNew->pNext)
508	pHdrNew->pNext->pPrev = pHdrNew;
509	else
510	pHeap->pTail = pHdrNew;
511	RTCritSectLeave(&pHeap->Lock);
512	}
513
514	/*
515	* Update statistics.
516	*/
517	#ifdef MMR3HEAP_WITH_STATISTICS
518	RTCritSectEnter(&pHeap->Lock);
519	pHdrNew->pStat->cbAllocated += cbNewSize - pHdrNew->cbSize;
520	pHeap->Stat.cbAllocated += cbNewSize - pHdrNew->cbSize;
521	RTCritSectLeave(&pHeap->Lock);
522	#endif
523
524	pHdrNew->cbSize = cbNewSize;
525
526	return pHdrNew + 1;
527	}
528
529
530	/**
531	* Duplicates the specified string.
532	*
533	* @returns Pointer to the duplicate.
534	* @returns NULL on failure or when input NULL.
535	* @param pUVM Pointer to the user mode VM structure.
536	* @param enmTag Statistics tag. Statistics are collected on a per tag
537	* basis in addition to a global one. Thus we can easily
538	* identify how memory is used by the VM.
539	* @param psz The string to duplicate. NULL is allowed.
540	*/
541	MMR3DECL(char ) MMR3HeapStrDupU(PUVM pUVM, MMTAG enmTag, const char psz)
542	{
543	if (!psz)
544	return NULL;
545	AssertPtr(psz);
546
547	size_t cch = strlen(psz) + 1;
548	char pszDup = (char )MMR3HeapAllocU(pUVM, enmTag, cch);
549	if (pszDup)
550	memcpy(pszDup, psz, cch);
551	return pszDup;
552	}
553
554
555	/**
556	* Duplicates the specified string.
557	*
558	* @returns Pointer to the duplicate.
559	* @returns NULL on failure or when input NULL.
560	* @param pVM The VM handle.
561	* @param enmTag Statistics tag. Statistics are collected on a per tag
562	* basis in addition to a global one. Thus we can easily
563	* identify how memory is used by the VM.
564	* @param psz The string to duplicate. NULL is allowed.
565	*/
566	MMR3DECL(char ) MMR3HeapStrDup(PVM pVM, MMTAG enmTag, const char psz)
567	{
568	return MMR3HeapStrDupU(pVM->pUVM, enmTag, psz);
569	}
570
571
572	/**
573	* Releases memory allocated with MMR3HeapAlloc() or MMR3HeapRealloc().
574	*
575	* @param pv Pointer to the memory block to free.
576	*/
577	MMR3DECL(void) MMR3HeapFree(void *pv)
578	{
579	/* Ignore NULL pointers. */
580	if (!pv)
581	return;
582
583	/*
584	* Validate header.
585	*/
586	PMMHEAPHDR pHdr = (PMMHEAPHDR)pv - 1;
587	if ( pHdr->cbSize & (MMR3HEAP_SIZE_ALIGNMENT - 1)
588	\|\| (uintptr_t)pHdr & (RTMEM_ALIGNMENT - 1))
589	{
590	AssertMsgFailed(("Invalid heap header! pv=%p, size=%#x\n", pv, pHdr->cbSize));
591	return;
592	}
593	Assert(pHdr->pStat != NULL);
594	Assert(!((uintptr_t)pHdr->pNext & (RTMEM_ALIGNMENT - 1)));
595	Assert(!((uintptr_t)pHdr->pPrev & (RTMEM_ALIGNMENT - 1)));
596
597	/*
598	* Update statistics
599	*/
600	PMMHEAP pHeap = pHdr->pStat->pHeap;
601	RTCritSectEnter(&pHeap->Lock);
602
603	#ifdef MMR3HEAP_WITH_STATISTICS
604	pHdr->pStat->cFrees++;
605	pHeap->Stat.cFrees++;
606	pHdr->pStat->cbFreed += pHdr->cbSize;
607	pHeap->Stat.cbFreed += pHdr->cbSize;
608	pHdr->pStat->cbCurAllocated -= pHdr->cbSize;
609	pHeap->Stat.cbCurAllocated -= pHdr->cbSize;
610	#endif
611
612	/*
613	* Unlink it.
614	*/
615	if (pHdr->pPrev)
616	pHdr->pPrev->pNext = pHdr->pNext;
617	else
618	pHeap->pHead = pHdr->pNext;
619
620	if (pHdr->pNext)
621	pHdr->pNext->pPrev = pHdr->pPrev;
622	else
623	pHeap->pTail = pHdr->pPrev;
624
625	RTCritSectLeave(&pHeap->Lock);
626
627	/*
628	* Free the memory.
629	*/
630	RTMemFree(pHdr);
631	}
632
633
634	/**
635	* Gets the string name of a memory tag.
636	*
637	* @returns name of enmTag.
638	* @param enmTag The tag.
639	*/
640	const char *mmR3GetTagName(MMTAG enmTag)
641	{
642	switch (enmTag)
643	{
644	#define TAG2STR(tag) case MM_TAG_##tag: return #tag
645
646	TAG2STR(CFGM);
647	TAG2STR(CFGM_BYTES);
648	TAG2STR(CFGM_STRING);
649	TAG2STR(CFGM_USER);
650
651	TAG2STR(CSAM);
652	TAG2STR(CSAM_PATCH);
653
654	TAG2STR(DBGF);
655	TAG2STR(DBGF_INFO);
656	TAG2STR(DBGF_LINE);
657	TAG2STR(DBGF_LINE_DUP);
658	TAG2STR(DBGF_MODULE);
659	TAG2STR(DBGF_OS);
660	TAG2STR(DBGF_STACK);
661	TAG2STR(DBGF_SYMBOL);
662	TAG2STR(DBGF_SYMBOL_DUP);
663
664	TAG2STR(EM);
665
666	TAG2STR(IOM);
667	TAG2STR(IOM_STATS);
668
669	TAG2STR(MM);
670	TAG2STR(MM_LOOKUP_GUEST);
671	TAG2STR(MM_LOOKUP_PHYS);
672	TAG2STR(MM_LOOKUP_VIRT);
673	TAG2STR(MM_PAGE);
674
675	TAG2STR(PATM);
676	TAG2STR(PATM_PATCH);
677
678	TAG2STR(PDM);
679	TAG2STR(PDM_DEVICE);
680	TAG2STR(PDM_DEVICE_USER);
681	TAG2STR(PDM_DRIVER);
682	TAG2STR(PDM_DRIVER_USER);
683	TAG2STR(PDM_USB);
684	TAG2STR(PDM_USB_USER);
685	TAG2STR(PDM_LUN);
686	TAG2STR(PDM_QUEUE);
687	TAG2STR(PDM_THREAD);
688	TAG2STR(PDM_ASYNC_COMPLETION);
689
690	TAG2STR(PGM);
691	TAG2STR(PGM_CHUNK_MAPPING);
692	TAG2STR(PGM_HANDLERS);
693	TAG2STR(PGM_PHYS);
694	TAG2STR(PGM_POOL);
695
696	TAG2STR(REM);
697
698	TAG2STR(SELM);
699
700	TAG2STR(SSM);
701
702	TAG2STR(STAM);
703
704	TAG2STR(TM);
705
706	TAG2STR(TRPM);
707
708	TAG2STR(VM);
709	TAG2STR(VM_REQ);
710
711	TAG2STR(VMM);
712
713	TAG2STR(HWACCM);
714
715	#undef TAG2STR
716
717	default:
718	{
719	AssertMsgFailed(("Unknown tag %d! forgot to add it to the switch?\n", enmTag));
720	static char sz[48];
721	RTStrPrintf(sz, sizeof(sz), "%d", enmTag);
722	return sz;
723	}
724	}
725	}
726

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/VMM/MMHeap.cpp@ 8847

Download in other formats: