alloc-ef.cpp@ 96507

Last change on this file since 96507 was 96407, checked in by vboxsync, 2 years ago
scm copyright and license note update
Property svn:eol-style set to `native` Property svn:keywords set to `Id Revision`
File size: 33.7 KB

Line
1	/* $Id: alloc-ef.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
2	/** @file
3	* IPRT - Memory Allocation, electric fence.
4	*/
5
6	/*
7	* Copyright (C) 2006-2022 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* The contents of this file may alternatively be used under the terms
26	* of the Common Development and Distribution License Version 1.0
27	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28	* in the VirtualBox distribution, in which case the provisions of the
29	* CDDL are applicable instead of those of the GPL.
30	*
31	* You may elect to license modified versions of this file under the
32	* terms and conditions of either the GPL or the CDDL or both.
33	*
34	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35	*/
36
37
38	/*********************************************************************************************************************************
39	* Header Files *
40	*********************************************************************************************************************************/
41	#include "alloc-ef.h"
42	#include <iprt/mem.h>
43	#include <iprt/log.h>
44	#include <iprt/asm.h>
45	#include <iprt/thread.h>
46	#include <VBox/sup.h>
47	#include <iprt/errcore.h>
48	#ifndef IPRT_NO_CRT
49	# include <errno.h>
50	# include <stdio.h>
51	# include <stdlib.h>
52	#endif
53
54	#include <iprt/alloc.h>
55	#include <iprt/assert.h>
56	#include <iprt/param.h>
57	#include <iprt/string.h>
58
59	#ifdef RTALLOC_REPLACE_MALLOC
60	# include <VBox/dis.h>
61	# include <VBox/disopcode.h>
62	# include <dlfcn.h>
63	# ifdef RT_OS_DARWIN
64	# include <malloc/malloc.h>
65	# endif
66	#endif
67
68
69	/*********************************************************************************************************************************
70	* Defined Constants And Macros *
71	*********************************************************************************************************************************/
72	#ifdef RTALLOC_REPLACE_MALLOC
73	# define RTMEM_REPLACMENT_ALIGN(a_cb) ((a_cb) >= 16 ? RT_ALIGN_Z(a_cb, 16) \
74	: (a_cb) >= sizeof(uintptr_t) ? RT_ALIGN_Z(a_cb, sizeof(uintptr_t)) : (a_cb))
75	#endif
76
77
78	/*********************************************************************************************************************************
79	* Global Variables *
80	*********************************************************************************************************************************/
81	#ifdef RTALLOC_EFENCE_TRACE
82	/** Spinlock protecting the all the block's globals. */
83	static volatile uint32_t g_BlocksLock;
84	/** Tree tracking the allocations. */
85	static AVLPVTREE g_BlocksTree;
86	# ifdef RTALLOC_EFENCE_FREE_DELAYED
87	/** Tail of the delayed blocks. */
88	static volatile PRTMEMBLOCK g_pBlocksDelayHead;
89	/** Tail of the delayed blocks. */
90	static volatile PRTMEMBLOCK g_pBlocksDelayTail;
91	/** Number of bytes in the delay list (includes fences). */
92	static volatile size_t g_cbBlocksDelay;
93	# endif /* RTALLOC_EFENCE_FREE_DELAYED */
94	# ifdef RTALLOC_REPLACE_MALLOC
95	/** @name For calling the real allocation API we've replaced.
96	* @{ */
97	void * (*g_pfnOrgMalloc)(size_t);
98	void * (*g_pfnOrgCalloc)(size_t, size_t);
99	void * (g_pfnOrgRealloc)(void , size_t);
100	void (g_pfnOrgFree)(void );
101	size_t (g_pfnOrgMallocSize)(void );
102	/** @} */
103	# endif
104	#endif /* RTALLOC_EFENCE_TRACE */
105	/** Array of pointers free watches for. */
106	void *gapvRTMemFreeWatch[4] = {NULL, NULL, NULL, NULL};
107	/** Enable logging of all freed memory. */
108	bool gfRTMemFreeLog = false;
109
110
111	/*********************************************************************************************************************************
112	* Internal Functions *
113	*********************************************************************************************************************************/
114	#ifdef RTALLOC_REPLACE_MALLOC
115	static void rtMemReplaceMallocAndFriends(void);
116	#endif
117
118
119	/**
120	* Complains about something.
121	*/
122	static void rtmemComplain(const char pszOp, const char pszFormat, ...)
123	{
124	va_list args;
125	fprintf(stderr, "RTMem error: %s: ", pszOp);
126	va_start(args, pszFormat);
127	vfprintf(stderr, pszFormat, args);
128	va_end(args);
129	RTAssertDoPanic();
130	}
131
132	/**
133	* Log an event.
134	*/
135	DECLINLINE(void) rtmemLog(const char pszOp, const char pszFormat, ...)
136	{
137	#if 0
138	va_list args;
139	fprintf(stderr, "RTMem info: %s: ", pszOp);
140	va_start(args, pszFormat);
141	vfprintf(stderr, pszFormat, args);
142	va_end(args);
143	#else
144	NOREF(pszOp); NOREF(pszFormat);
145	#endif
146	}
147
148
149	#ifdef RTALLOC_EFENCE_TRACE
150
151	/**
152	* Acquires the lock.
153	*/
154	DECLINLINE(void) rtmemBlockLock(void)
155	{
156	unsigned c = 0;
157	while (!ASMAtomicCmpXchgU32(&g_BlocksLock, 1, 0))
158	RTThreadSleepNoLog(((++c) >> 2) & 31);
159	}
160
161
162	/**
163	* Releases the lock.
164	*/
165	DECLINLINE(void) rtmemBlockUnlock(void)
166	{
167	Assert(g_BlocksLock == 1);
168	ASMAtomicXchgU32(&g_BlocksLock, 0);
169	}
170
171
172	/**
173	* Creates a block.
174	*/
175	DECLINLINE(PRTMEMBLOCK) rtmemBlockCreate(RTMEMTYPE enmType, size_t cbUnaligned, size_t cbAligned,
176	const char pszTag, void pvCaller, RT_SRC_POS_DECL)
177	{
178	# ifdef RTALLOC_REPLACE_MALLOC
179	if (!g_pfnOrgMalloc)
180	rtMemReplaceMallocAndFriends();
181	PRTMEMBLOCK pBlock = (PRTMEMBLOCK)g_pfnOrgMalloc(sizeof(*pBlock));
182	# else
183	PRTMEMBLOCK pBlock = (PRTMEMBLOCK)malloc(sizeof(*pBlock));
184	# endif
185	if (pBlock)
186	{
187	pBlock->enmType = enmType;
188	pBlock->cbUnaligned = cbUnaligned;
189	pBlock->cbAligned = cbAligned;
190	pBlock->pszTag = pszTag;
191	pBlock->pvCaller = pvCaller;
192	pBlock->iLine = iLine;
193	pBlock->pszFile = pszFile;
194	pBlock->pszFunction = pszFunction;
195	}
196	return pBlock;
197	}
198
199
200	/**
201	* Frees a block.
202	*/
203	DECLINLINE(void) rtmemBlockFree(PRTMEMBLOCK pBlock)
204	{
205	# ifdef RTALLOC_REPLACE_MALLOC
206	g_pfnOrgFree(pBlock);
207	# else
208	free(pBlock);
209	# endif
210	}
211
212
213	/**
214	* Insert a block from the tree.
215	*/
216	DECLINLINE(void) rtmemBlockInsert(PRTMEMBLOCK pBlock, void *pv)
217	{
218	pBlock->Core.Key = pv;
219	rtmemBlockLock();
220	bool fRc = RTAvlPVInsert(&g_BlocksTree, &pBlock->Core);
221	rtmemBlockUnlock();
222	AssertRelease(fRc);
223	}
224
225
226	/**
227	* Remove a block from the tree and returns it to the caller.
228	*/
229	DECLINLINE(PRTMEMBLOCK) rtmemBlockRemove(void *pv)
230	{
231	rtmemBlockLock();
232	PRTMEMBLOCK pBlock = (PRTMEMBLOCK)RTAvlPVRemove(&g_BlocksTree, pv);
233	rtmemBlockUnlock();
234	return pBlock;
235	}
236
237	/**
238	* Gets a block.
239	*/
240	DECLINLINE(PRTMEMBLOCK) rtmemBlockGet(void *pv)
241	{
242	rtmemBlockLock();
243	PRTMEMBLOCK pBlock = (PRTMEMBLOCK)RTAvlPVGet(&g_BlocksTree, pv);
244	rtmemBlockUnlock();
245	return pBlock;
246	}
247
248	/**
249	* Dumps one allocation.
250	*/
251	static DECLCALLBACK(int) RTMemDumpOne(PAVLPVNODECORE pNode, void *pvUser)
252	{
253	PRTMEMBLOCK pBlock = (PRTMEMBLOCK)pNode;
254	fprintf(stderr, "%p %08lx(+%02lx) %p\n",
255	pBlock->Core.Key,
256	(unsigned long)pBlock->cbUnaligned,
257	(unsigned long)(pBlock->cbAligned - pBlock->cbUnaligned),
258	pBlock->pvCaller);
259	NOREF(pvUser);
260	return 0;
261	}
262
263	/**
264	* Dumps the allocated blocks.
265	* This is something which you should call from gdb.
266	*/
267	extern "C" void RTMemDump(void);
268	void RTMemDump(void)
269	{
270	fprintf(stderr, "address size(alg) caller\n");
271	RTAvlPVDoWithAll(&g_BlocksTree, true, RTMemDumpOne, NULL);
272	}
273
274	# ifdef RTALLOC_EFENCE_FREE_DELAYED
275
276	/**
277	* Insert a delayed block.
278	*/
279	DECLINLINE(void) rtmemBlockDelayInsert(PRTMEMBLOCK pBlock)
280	{
281	size_t cbBlock = RT_ALIGN_Z(pBlock->cbAligned, PAGE_SIZE) + RTALLOC_EFENCE_SIZE;
282	pBlock->Core.pRight = NULL;
283	pBlock->Core.pLeft = NULL;
284	rtmemBlockLock();
285	if (g_pBlocksDelayHead)
286	{
287	g_pBlocksDelayHead->Core.pLeft = (PAVLPVNODECORE)pBlock;
288	pBlock->Core.pRight = (PAVLPVNODECORE)g_pBlocksDelayHead;
289	g_pBlocksDelayHead = pBlock;
290	}
291	else
292	{
293	g_pBlocksDelayTail = pBlock;
294	g_pBlocksDelayHead = pBlock;
295	}
296	g_cbBlocksDelay += cbBlock;
297	rtmemBlockUnlock();
298	}
299
300	/**
301	* Removes a delayed block.
302	*/
303	DECLINLINE(PRTMEMBLOCK) rtmemBlockDelayRemove(void)
304	{
305	PRTMEMBLOCK pBlock = NULL;
306	rtmemBlockLock();
307	if (g_cbBlocksDelay > RTALLOC_EFENCE_FREE_DELAYED)
308	{
309	pBlock = g_pBlocksDelayTail;
310	if (pBlock)
311	{
312	g_pBlocksDelayTail = (PRTMEMBLOCK)pBlock->Core.pLeft;
313	if (pBlock->Core.pLeft)
314	pBlock->Core.pLeft->pRight = NULL;
315	else
316	g_pBlocksDelayHead = NULL;
317	g_cbBlocksDelay -= RT_ALIGN_Z(pBlock->cbAligned, PAGE_SIZE) + RTALLOC_EFENCE_SIZE;
318	}
319	}
320	rtmemBlockUnlock();
321	return pBlock;
322	}
323
324
325	/**
326	* Dumps the freed blocks.
327	* This is something which you should call from gdb.
328	*/
329	extern "C" void RTMemDumpFreed(void);
330	void RTMemDumpFreed(void)
331	{
332	fprintf(stderr, "address size(alg) caller\n");
333	for (PRTMEMBLOCK pCur = g_pBlocksDelayHead; pCur; pCur = (PRTMEMBLOCK)pCur->Core.pRight)
334	RTMemDumpOne(&pCur->Core, NULL);
335
336	}
337
338	# endif /* RTALLOC_EFENCE_FREE_DELAYED */
339
340	#endif /* RTALLOC_EFENCE_TRACE */
341
342
343	#if defined(RTALLOC_REPLACE_MALLOC) && defined(RTALLOC_EFENCE_TRACE)
344	/*
345	*
346	* Replacing malloc, calloc, realloc, & free.
347	*
348	*/
349
350	/** Replacement for malloc. */
351	static void *rtMemReplacementMalloc(size_t cb)
352	{
353	size_t cbAligned = RTMEM_REPLACMENT_ALIGN(cb);
354	void *pv = rtR3MemAlloc("r-malloc", RTMEMTYPE_RTMEMALLOC, cb, cbAligned, "heap", ASMReturnAddress(), RT_SRC_POS);
355	if (!pv)
356	pv = g_pfnOrgMalloc(cb);
357	return pv;
358	}
359
360	/** Replacement for calloc. */
361	static void *rtMemReplacementCalloc(size_t cbItem, size_t cItems)
362	{
363	size_t cb = cbItem * cItems;
364	size_t cbAligned = RTMEM_REPLACMENT_ALIGN(cb);
365	void *pv = rtR3MemAlloc("r-calloc", RTMEMTYPE_RTMEMALLOCZ, cb, cbAligned, "heap", ASMReturnAddress(), RT_SRC_POS);
366	if (!pv)
367	pv = g_pfnOrgCalloc(cbItem, cItems);
368	return pv;
369	}
370
371	/** Replacement for realloc. */
372	static void rtMemReplacementRealloc(void pvOld, size_t cbNew)
373	{
374	if (pvOld)
375	{
376	/* We're not strict about where the memory was allocated. */
377	PRTMEMBLOCK pBlock = rtmemBlockGet(pvOld);
378	if (pBlock)
379	{
380	size_t cbAligned = RTMEM_REPLACMENT_ALIGN(cbNew);
381	return rtR3MemRealloc("r-realloc", RTMEMTYPE_RTMEMREALLOC, pvOld, cbAligned, "heap", ASMReturnAddress(), RT_SRC_POS);
382	}
383	return g_pfnOrgRealloc(pvOld, cbNew);
384	}
385	return rtMemReplacementMalloc(cbNew);
386	}
387
388	/** Replacement for free(). */
389	static void rtMemReplacementFree(void *pv)
390	{
391	if (pv)
392	{
393	/* We're not strict about where the memory was allocated. */
394	PRTMEMBLOCK pBlock = rtmemBlockGet(pv);
395	if (pBlock)
396	rtR3MemFree("r-free", RTMEMTYPE_RTMEMFREE, pv, 0, ASMReturnAddress(), RT_SRC_POS);
397	else
398	g_pfnOrgFree(pv);
399	}
400	}
401
402	# ifdef RT_OS_DARWIN
403	/** Replacement for malloc. */
404	static size_t rtMemReplacementMallocSize(void *pv)
405	{
406	size_t cb;
407	if (pv)
408	{
409	/* We're not strict about where the memory was allocated. */
410	PRTMEMBLOCK pBlock = rtmemBlockGet(pv);
411	if (pBlock)
412	cb = pBlock->cbUnaligned;
413	else
414	cb = g_pfnOrgMallocSize(pv);
415	}
416	else
417	cb = 0;
418	return cb;
419	}
420	# endif
421
422
423	static void rtMemReplaceMallocAndFriends(void)
424	{
425	struct
426	{
427	const char *pszName;
428	PFNRT pfnReplacement;
429	PFNRT pfnOrg;
430	PFNRT *ppfnJumpBack;
431	} aApis[] =
432	{
433	{ "free", (PFNRT)rtMemReplacementFree, (PFNRT)free, (PFNRT *)&g_pfnOrgFree },
434	{ "realloc", (PFNRT)rtMemReplacementRealloc, (PFNRT)realloc, (PFNRT *)&g_pfnOrgRealloc },
435	{ "calloc", (PFNRT)rtMemReplacementCalloc, (PFNRT)calloc, (PFNRT *)&g_pfnOrgCalloc },
436	{ "malloc", (PFNRT)rtMemReplacementMalloc, (PFNRT)malloc, (PFNRT *)&g_pfnOrgMalloc },
437	#ifdef RT_OS_DARWIN
438	{ "malloc_size", (PFNRT)rtMemReplacementMallocSize, (PFNRT)malloc_size, (PFNRT *)&g_pfnOrgMallocSize },
439	#endif
440	};
441
442	/*
443	* Initialize the jump backs to avoid recursivly entering this function.
444	*/
445	for (unsigned i = 0; i < RT_ELEMENTS(aApis); i++)
446	*aApis[i].ppfnJumpBack = aApis[i].pfnOrg;
447
448	/*
449	* Give the user an option to skip replacing malloc.
450	*/
451	if (getenv("IPRT_DONT_REPLACE_MALLOC"))
452	return;
453
454	/*
455	* Allocate a page for jump back code (we leak it).
456	*/
457	uint8_t pbExecPage = (uint8_t )RTMemPageAlloc(PAGE_SIZE); AssertFatal(pbExecPage);
458	int rc = RTMemProtect(pbExecPage, PAGE_SIZE, RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC); AssertFatalRC(rc);
459
460	/*
461	* Do the ground work.
462	*/
463	uint8_t *pb = pbExecPage;
464	for (unsigned i = 0; i < RT_ELEMENTS(aApis); i++)
465	{
466	/* Resolve it. */
467	PFNRT pfnOrg = (PFNRT)(uintptr_t)dlsym(RTLD_DEFAULT, aApis[i].pszName);
468	if (pfnOrg)
469	aApis[i].pfnOrg = pfnOrg;
470	else
471	pfnOrg = aApis[i].pfnOrg;
472
473	/* Figure what we can replace and how much to duplicate in the jump back code. */
474	# ifdef RT_ARCH_AMD64
475	uint32_t cbNeeded = 12;
476	DISCPUMODE const enmCpuMode = DISCPUMODE_64BIT;
477	# elif defined(RT_ARCH_X86)
478	uint32_t const cbNeeded = 5;
479	DISCPUMODE const enmCpuMode = DISCPUMODE_32BIT;
480	# else
481	# error "Port me"
482	# endif
483	uint32_t offJmpBack = 0;
484	uint32_t cbCopy = 0;
485	while (offJmpBack < cbNeeded)
486	{
487	DISCPUSTATE Dis;
488	uint32_t cbInstr = 1;
489	rc = DISInstr((void *)((uintptr_t)pfnOrg + offJmpBack), enmCpuMode, &Dis, &cbInstr); AssertFatalRC(rc);
490	AssertFatal(!(Dis.pCurInstr->fOpType & (DISOPTYPE_CONTROLFLOW)));
491	# ifdef RT_ARCH_AMD64
492	# ifdef RT_OS_DARWIN
493	/* Kludge for: cmp [malloc_def_zone_state], 1; jg 2; call _malloc_initialize; 2: */
494	DISQPVPARAMVAL Parm;
495	if ( Dis.ModRM.Bits.Mod == 0
496	&& Dis.ModRM.Bits.Rm == 5 /* wrt RIP */
497	&& (Dis.Param2.fUse & (DISUSE_IMMEDIATE16_SX8 \| DISUSE_IMMEDIATE32_SX8 \| DISUSE_IMMEDIATE64_SX8))
498	&& Dis.Param2.uValue == 1
499	&& Dis.pCurInstr->uOpcode == OP_CMP)
500	{
501	cbCopy = offJmpBack;
502
503	offJmpBack += cbInstr;
504	rc = DISInstr((void *)((uintptr_t)pfnOrg + offJmpBack), enmCpuMode, &Dis, &cbInstr); AssertFatalRC(rc);
505	if ( Dis.pCurInstr->uOpcode == OP_JNBE
506	&& Dis.Param1.uDisp.i8 == 5)
507	{
508	offJmpBack += cbInstr + 5;
509	AssertFatal(offJmpBack >= cbNeeded);
510	break;
511	}
512	}
513	# endif
514	AssertFatal(!(Dis.ModRM.Bits.Mod == 0 && Dis.ModRM.Bits.Rm == 5 /* wrt RIP */));
515	# endif
516	offJmpBack += cbInstr;
517	}
518	if (!cbCopy)
519	cbCopy = offJmpBack;
520
521	/* Assemble the jump back. */
522	memcpy(pb, (void *)(uintptr_t)pfnOrg, cbCopy);
523	uint32_t off = cbCopy;
524	# ifdef RT_ARCH_AMD64
525	pb[off++] = 0xff; /* jmp qword [$+8 wrt RIP] */
526	pb[off++] = 0x25;
527	(uint32_t )&pb[off] = 0;
528	off += 4;
529	(uint64_t )&pb[off] = (uintptr_t)pfnOrg + offJmpBack;
530	off += 8;
531	off = RT_ALIGN_32(off, 16);
532	# elif defined(RT_ARCH_X86)
533	pb[off++] = 0xe9; /* jmp rel32 */
534	(uint32_t )&pb[off] = (uintptr_t)pfnOrg + offJmpBack - (uintptr_t)&pb[4];
535	off += 4;
536	off = RT_ALIGN_32(off, 8);
537	# else
538	# error "Port me"
539	# endif
540	*aApis[i].ppfnJumpBack = (PFNRT)(uintptr_t)pb;
541	pb += off;
542	}
543
544	/*
545	* Modify the APIs.
546	*/
547	for (unsigned i = 0; i < RT_ELEMENTS(aApis); i++)
548	{
549	pb = (uint8_t *)(uintptr_t)aApis[i].pfnOrg;
550	rc = RTMemProtect(pb, 16, RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC); AssertFatalRC(rc);
551
552	# ifdef RT_ARCH_AMD64
553	/* Assemble the LdrLoadDll patch. */
554	pb++ = 0x48; / mov rax, qword */
555	*pb++ = 0xb8;
556	(uint64_t )pb = (uintptr_t)aApis[i].pfnReplacement;
557	pb += 8;
558	pb++ = 0xff; / jmp rax */
559	*pb++ = 0xe0;
560	# elif defined(RT_ARCH_X86)
561	pb++ = 0xe9; / jmp rel32 */
562	(uint32_t )pb = (uintptr_t)aApis[i].pfnReplacement - (uintptr_t)&pb[4];
563	# else
564	# error "Port me"
565	# endif
566	}
567	}
568
569	#endif /* RTALLOC_REPLACE_MALLOC && RTALLOC_EFENCE_TRACE */
570
571
572	/**
573	* Internal allocator.
574	*/
575	RTDECL(void ) rtR3MemAlloc(const char pszOp, RTMEMTYPE enmType, size_t cbUnaligned, size_t cbAligned,
576	const char pszTag, void pvCaller, RT_SRC_POS_DECL)
577	{
578	/*
579	* Sanity.
580	*/
581	if ( RT_ALIGN_Z(RTALLOC_EFENCE_SIZE, PAGE_SIZE) != RTALLOC_EFENCE_SIZE
582	&& RTALLOC_EFENCE_SIZE <= 0)
583	{
584	rtmemComplain(pszOp, "Invalid E-fence size! %#x\n", RTALLOC_EFENCE_SIZE);
585	return NULL;
586	}
587	if (!cbUnaligned)
588	{
589	#if 0
590	rtmemComplain(pszOp, "Request of ZERO bytes allocation!\n");
591	return NULL;
592	#else
593	cbAligned = cbUnaligned = 1;
594	#endif
595	}
596
597	#ifndef RTALLOC_EFENCE_IN_FRONT
598	/* Alignment decreases fence accuracy, but this is at least partially
599	* counteracted by filling and checking the alignment padding. When the
600	* fence is in front then then no extra alignment is needed. */
601	cbAligned = RT_ALIGN_Z(cbAligned, RTALLOC_EFENCE_ALIGNMENT);
602	#endif
603
604	#ifdef RTALLOC_EFENCE_TRACE
605	/*
606	* Allocate the trace block.
607	*/
608	PRTMEMBLOCK pBlock = rtmemBlockCreate(enmType, cbUnaligned, cbAligned, pszTag, pvCaller, RT_SRC_POS_ARGS);
609	if (!pBlock)
610	{
611	rtmemComplain(pszOp, "Failed to allocate trace block!\n");
612	return NULL;
613	}
614	#endif
615
616	/*
617	* Allocate a block with page alignment space + the size of the E-fence.
618	*/
619	size_t cbBlock = RT_ALIGN_Z(cbAligned, PAGE_SIZE) + RTALLOC_EFENCE_SIZE;
620	void *pvBlock = RTMemPageAlloc(cbBlock);
621	if (pvBlock)
622	{
623	/*
624	* Calc the start of the fence and the user block
625	* and then change the page protection of the fence.
626	*/
627	#ifdef RTALLOC_EFENCE_IN_FRONT
628	void *pvEFence = pvBlock;
629	void pv = (char )pvEFence + RTALLOC_EFENCE_SIZE;
630	# ifdef RTALLOC_EFENCE_NOMAN_FILLER
631	memset((char *)pv + cbUnaligned, RTALLOC_EFENCE_NOMAN_FILLER, cbBlock - RTALLOC_EFENCE_SIZE - cbUnaligned);
632	# endif
633	#else
634	void pvEFence = (char )pvBlock + (cbBlock - RTALLOC_EFENCE_SIZE);
635	void pv = (char )pvEFence - cbAligned;
636	# ifdef RTALLOC_EFENCE_NOMAN_FILLER
637	memset(pvBlock, RTALLOC_EFENCE_NOMAN_FILLER, cbBlock - RTALLOC_EFENCE_SIZE - cbAligned);
638	memset((char *)pv + cbUnaligned, RTALLOC_EFENCE_NOMAN_FILLER, cbAligned - cbUnaligned);
639	# endif
640	#endif
641
642	#ifdef RTALLOC_EFENCE_FENCE_FILLER
643	memset(pvEFence, RTALLOC_EFENCE_FENCE_FILLER, RTALLOC_EFENCE_SIZE);
644	#endif
645	int rc = RTMemProtect(pvEFence, RTALLOC_EFENCE_SIZE, RTMEM_PROT_NONE);
646	if (!rc)
647	{
648	#ifdef RTALLOC_EFENCE_TRACE
649	rtmemBlockInsert(pBlock, pv);
650	#endif
651	if (enmType == RTMEMTYPE_RTMEMALLOCZ)
652	memset(pv, 0, cbUnaligned);
653	#ifdef RTALLOC_EFENCE_FILLER
654	else
655	memset(pv, RTALLOC_EFENCE_FILLER, cbUnaligned);
656	#endif
657
658	rtmemLog(pszOp, "returns %p (pvBlock=%p cbBlock=%#x pvEFence=%p cbUnaligned=%#x)\n", pv, pvBlock, cbBlock, pvEFence, cbUnaligned);
659	return pv;
660	}
661	rtmemComplain(pszOp, "RTMemProtect failed, pvEFence=%p size %d, rc=%d\n", pvEFence, RTALLOC_EFENCE_SIZE, rc);
662	RTMemPageFree(pvBlock, cbBlock);
663	}
664	else
665	rtmemComplain(pszOp, "Failed to allocated %lu (%lu) bytes.\n", (unsigned long)cbBlock, (unsigned long)cbUnaligned);
666
667	#ifdef RTALLOC_EFENCE_TRACE
668	rtmemBlockFree(pBlock);
669	#endif
670	return NULL;
671	}
672
673
674	/**
675	* Internal free.
676	*/
677	RTDECL(void) rtR3MemFree(const char pszOp, RTMEMTYPE enmType, void pv, size_t cbUser, void *pvCaller, RT_SRC_POS_DECL)
678	{
679	NOREF(enmType); RT_SRC_POS_NOREF();
680
681	/*
682	* Simple case.
683	*/
684	if (!pv)
685	return;
686
687	/*
688	* Check watch points.
689	*/
690	for (unsigned i = 0; i < RT_ELEMENTS(gapvRTMemFreeWatch); i++)
691	if (gapvRTMemFreeWatch[i] == pv)
692	RTAssertDoPanic();
693
694	#ifdef RTALLOC_EFENCE_TRACE
695	/*
696	* Find the block.
697	*/
698	PRTMEMBLOCK pBlock = rtmemBlockRemove(pv);
699	if (pBlock)
700	{
701	if (gfRTMemFreeLog)
702	RTLogPrintf("RTMem %s: pv=%p pvCaller=%p cbUnaligned=%#x\n", pszOp, pv, pvCaller, pBlock->cbUnaligned);
703
704	# ifdef RTALLOC_EFENCE_NOMAN_FILLER
705	/*
706	* Check whether the no man's land is untouched.
707	*/
708	# ifdef RTALLOC_EFENCE_IN_FRONT
709	void pvWrong = ASMMemFirstMismatchingU8((char )pv + pBlock->cbUnaligned,
710	RT_ALIGN_Z(pBlock->cbAligned, PAGE_SIZE) - pBlock->cbUnaligned,
711	RTALLOC_EFENCE_NOMAN_FILLER);
712	# else
713	/* Alignment must match allocation alignment in rtMemAlloc(). */
714	void pvWrong = ASMMemFirstMismatchingU8((char )pv + pBlock->cbUnaligned,
715	pBlock->cbAligned - pBlock->cbUnaligned,
716	RTALLOC_EFENCE_NOMAN_FILLER);
717	if (pvWrong)
718	RTAssertDoPanic();
719	pvWrong = ASMMemFirstMismatchingU8((void *)((uintptr_t)pv & ~(uintptr_t)PAGE_OFFSET_MASK),
720	RT_ALIGN_Z(pBlock->cbAligned, PAGE_SIZE) - pBlock->cbAligned,
721	RTALLOC_EFENCE_NOMAN_FILLER);
722	# endif
723	if (pvWrong)
724	RTAssertDoPanic();
725	# endif
726
727	/*
728	* Fill the user part of the block.
729	*/
730	AssertMsg(enmType != RTMEMTYPE_RTMEMFREEZ \|\| cbUser == pBlock->cbUnaligned,
731	("cbUser=%#zx cbUnaligned=%#zx\n", cbUser, pBlock->cbUnaligned));
732	RT_NOREF(cbUser);
733	if (enmType == RTMEMTYPE_RTMEMFREEZ)
734	RT_BZERO(pv, pBlock->cbUnaligned);
735	# ifdef RTALLOC_EFENCE_FREE_FILL
736	else
737	memset(pv, RTALLOC_EFENCE_FREE_FILL, pBlock->cbUnaligned);
738	# endif
739
740	# if defined(RTALLOC_EFENCE_FREE_DELAYED) && RTALLOC_EFENCE_FREE_DELAYED > 0
741	/*
742	* We're doing delayed freeing.
743	* That means we'll expand the E-fence to cover the entire block.
744	*/
745	int rc = RTMemProtect(pv, pBlock->cbAligned, RTMEM_PROT_NONE);
746	if (RT_SUCCESS(rc))
747	{
748	/*
749	* Insert it into the free list and process pending frees.
750	*/
751	rtmemBlockDelayInsert(pBlock);
752	while ((pBlock = rtmemBlockDelayRemove()) != NULL)
753	{
754	pv = pBlock->Core.Key;
755	# ifdef RTALLOC_EFENCE_IN_FRONT
756	void pvBlock = (char )pv - RTALLOC_EFENCE_SIZE;
757	# else
758	void pvBlock = (void )((uintptr_t)pv & ~(uintptr_t)PAGE_OFFSET_MASK);
759	# endif
760	size_t cbBlock = RT_ALIGN_Z(pBlock->cbAligned, PAGE_SIZE) + RTALLOC_EFENCE_SIZE;
761	rc = RTMemProtect(pvBlock, cbBlock, RTMEM_PROT_READ \| RTMEM_PROT_WRITE);
762	if (RT_SUCCESS(rc))
763	RTMemPageFree(pvBlock, RT_ALIGN_Z(pBlock->cbAligned, PAGE_SIZE) + RTALLOC_EFENCE_SIZE);
764	else
765	rtmemComplain(pszOp, "RTMemProtect(%p, %#x, RTMEM_PROT_READ \| RTMEM_PROT_WRITE) -> %d\n", pvBlock, cbBlock, rc);
766	rtmemBlockFree(pBlock);
767	}
768	}
769	else
770	rtmemComplain(pszOp, "Failed to expand the efence of pv=%p cb=%d, rc=%d.\n", pv, pBlock, rc);
771
772	# else /* !RTALLOC_EFENCE_FREE_DELAYED */
773
774	/*
775	* Turn of the E-fence and free it.
776	*/
777	# ifdef RTALLOC_EFENCE_IN_FRONT
778	void pvBlock = (char )pv - RTALLOC_EFENCE_SIZE;
779	void *pvEFence = pvBlock;
780	# else
781	void pvBlock = (void )((uintptr_t)pv & ~(uintptr_t)PAGE_OFFSET_MASK);
782	void pvEFence = (char )pv + pBlock->cb;
783	# endif
784	int rc = RTMemProtect(pvEFence, RTALLOC_EFENCE_SIZE, RTMEM_PROT_READ \| RTMEM_PROT_WRITE);
785	if (RT_SUCCESS(rc))
786	RTMemPageFree(pvBlock, RT_ALIGN_Z(pBlock->cbAligned, PAGE_SIZE) + RTALLOC_EFENCE_SIZE);
787	else
788	rtmemComplain(pszOp, "RTMemProtect(%p, %#x, RTMEM_PROT_READ \| RTMEM_PROT_WRITE) -> %d\n", pvEFence, RTALLOC_EFENCE_SIZE, rc);
789	rtmemBlockFree(pBlock);
790
791	# endif /* !RTALLOC_EFENCE_FREE_DELAYED */
792	}
793	else
794	rtmemComplain(pszOp, "pv=%p not found! Incorrect free!\n", pv);
795
796	#else /* !RTALLOC_EFENCE_TRACE */
797
798	/*
799	* We have no size tracking, so we're not doing any freeing because
800	* we cannot if the E-fence is after the block.
801	* Let's just expand the E-fence to the first page of the user bit
802	* since we know that it's around.
803	*/
804	if (enmType == RTMEMTYPE_RTMEMFREEZ)
805	RT_BZERO(pv, cbUser);
806	int rc = RTMemProtect((void *)((uintptr_t)pv & ~(uintptr_t)PAGE_OFFSET_MASK), PAGE_SIZE, RTMEM_PROT_NONE);
807	if (RT_FAILURE(rc))
808	rtmemComplain(pszOp, "RTMemProtect(%p, PAGE_SIZE, RTMEM_PROT_NONE) -> %d\n", (void *)((uintptr_t)pv & ~(uintptr_t)PAGE_OFFSET_MASK), rc);
809	#endif /* !RTALLOC_EFENCE_TRACE */
810	}
811
812
813	/**
814	* Internal realloc.
815	*/
816	RTDECL(void ) rtR3MemRealloc(const char pszOp, RTMEMTYPE enmType, void *pvOld, size_t cbNew,
817	const char pszTag, void pvCaller, RT_SRC_POS_DECL)
818	{
819	/*
820	* Allocate new and copy.
821	*/
822	if (!pvOld)
823	return rtR3MemAlloc(pszOp, enmType, cbNew, cbNew, pszTag, pvCaller, RT_SRC_POS_ARGS);
824	if (!cbNew)
825	{
826	rtR3MemFree(pszOp, RTMEMTYPE_RTMEMREALLOC, pvOld, 0, pvCaller, RT_SRC_POS_ARGS);
827	return NULL;
828	}
829
830	#ifdef RTALLOC_EFENCE_TRACE
831
832	/*
833	* Get the block, allocate the new, copy the data, free the old one.
834	*/
835	PRTMEMBLOCK pBlock = rtmemBlockGet(pvOld);
836	if (pBlock)
837	{
838	void *pvRet = rtR3MemAlloc(pszOp, enmType, cbNew, cbNew, pszTag, pvCaller, RT_SRC_POS_ARGS);
839	if (pvRet)
840	{
841	memcpy(pvRet, pvOld, RT_MIN(cbNew, pBlock->cbUnaligned));
842	rtR3MemFree(pszOp, RTMEMTYPE_RTMEMREALLOC, pvOld, 0, pvCaller, RT_SRC_POS_ARGS);
843	}
844	return pvRet;
845	}
846	else
847	rtmemComplain(pszOp, "pvOld=%p was not found!\n", pvOld);
848	return NULL;
849
850	#else /* !RTALLOC_EFENCE_TRACE */
851
852	rtmemComplain(pszOp, "Not supported if RTALLOC_EFENCE_TRACE isn't defined!\n");
853	return NULL;
854
855	#endif /* !RTALLOC_EFENCE_TRACE */
856	}
857
858
859
860
861	RTDECL(void ) RTMemEfTmpAlloc(size_t cb, const char pszTag, RT_SRC_POS_DECL) RT_NO_THROW_DEF
862	{
863	return rtR3MemAlloc("TmpAlloc", RTMEMTYPE_RTMEMALLOC, cb, cb, pszTag, ASMReturnAddress(), RT_SRC_POS_ARGS);
864	}
865
866
867	RTDECL(void ) RTMemEfTmpAllocZ(size_t cb, const char pszTag, RT_SRC_POS_DECL) RT_NO_THROW_DEF
868	{
869	return rtR3MemAlloc("TmpAlloc", RTMEMTYPE_RTMEMALLOCZ, cb, cb, pszTag, ASMReturnAddress(), RT_SRC_POS_ARGS);
870	}
871
872
873	RTDECL(void) RTMemEfTmpFree(void *pv, RT_SRC_POS_DECL) RT_NO_THROW_DEF
874	{
875	if (pv)
876	rtR3MemFree("Free", RTMEMTYPE_RTMEMFREE, pv, 0, ASMReturnAddress(), RT_SRC_POS_ARGS);
877	}
878
879
880	RTDECL(void) RTMemEfTmpFreeZ(void *pv, size_t cb, RT_SRC_POS_DECL) RT_NO_THROW_DEF
881	{
882	if (pv)
883	rtR3MemFree("FreeZ", RTMEMTYPE_RTMEMFREEZ, pv, cb, ASMReturnAddress(), RT_SRC_POS_ARGS);
884	}
885
886
887	RTDECL(void ) RTMemEfAlloc(size_t cb, const char pszTag, RT_SRC_POS_DECL) RT_NO_THROW_DEF
888	{
889	return rtR3MemAlloc("Alloc", RTMEMTYPE_RTMEMALLOC, cb, cb, pszTag, ASMReturnAddress(), RT_SRC_POS_ARGS);
890	}
891
892
893	RTDECL(void ) RTMemEfAllocZ(size_t cb, const char pszTag, RT_SRC_POS_DECL) RT_NO_THROW_DEF
894	{
895	return rtR3MemAlloc("AllocZ", RTMEMTYPE_RTMEMALLOCZ, cb, cb, pszTag, ASMReturnAddress(), RT_SRC_POS_ARGS);
896	}
897
898
899	RTDECL(void ) RTMemEfAllocVar(size_t cbUnaligned, const char pszTag, RT_SRC_POS_DECL) RT_NO_THROW_DEF
900	{
901	size_t cbAligned;
902	if (cbUnaligned >= 16)
903	cbAligned = RT_ALIGN_Z(cbUnaligned, 16);
904	else
905	cbAligned = RT_ALIGN_Z(cbUnaligned, sizeof(void *));
906	return rtR3MemAlloc("Alloc", RTMEMTYPE_RTMEMALLOC, cbUnaligned, cbAligned, pszTag, ASMReturnAddress(), RT_SRC_POS_ARGS);
907	}
908
909
910	RTDECL(void ) RTMemEfAllocZVar(size_t cbUnaligned, const char pszTag, RT_SRC_POS_DECL) RT_NO_THROW_DEF
911	{
912	size_t cbAligned;
913	if (cbUnaligned >= 16)
914	cbAligned = RT_ALIGN_Z(cbUnaligned, 16);
915	else
916	cbAligned = RT_ALIGN_Z(cbUnaligned, sizeof(void *));
917	return rtR3MemAlloc("AllocZ", RTMEMTYPE_RTMEMALLOCZ, cbUnaligned, cbAligned, pszTag, ASMReturnAddress(), RT_SRC_POS_ARGS);
918	}
919
920
921	RTDECL(void ) RTMemEfRealloc(void pvOld, size_t cbNew, const char *pszTag, RT_SRC_POS_DECL) RT_NO_THROW_DEF
922	{
923	return rtR3MemRealloc("Realloc", RTMEMTYPE_RTMEMREALLOC, pvOld, cbNew, pszTag, ASMReturnAddress(), RT_SRC_POS_ARGS);
924	}
925
926
927	RTDECL(void ) RTMemEfReallocZ(void pvOld, size_t cbOld, size_t cbNew, const char *pszTag, RT_SRC_POS_DECL) RT_NO_THROW_DEF
928	{
929	void *pvDst = rtR3MemRealloc("ReallocZ", RTMEMTYPE_RTMEMREALLOC, pvOld, cbNew, pszTag, ASMReturnAddress(), RT_SRC_POS_ARGS);
930	if (pvDst && cbNew > cbOld)
931	memset((uint8_t *)pvDst + cbOld, 0, cbNew - cbOld);
932	return pvDst;
933	}
934
935
936	RTDECL(void) RTMemEfFree(void *pv, RT_SRC_POS_DECL) RT_NO_THROW_DEF
937	{
938	if (pv)
939	rtR3MemFree("Free", RTMEMTYPE_RTMEMFREE, pv, 0, ASMReturnAddress(), RT_SRC_POS_ARGS);
940	}
941
942
943	RTDECL(void) RTMemEfFreeZ(void *pv, size_t cb, RT_SRC_POS_DECL) RT_NO_THROW_DEF
944	{
945	if (pv)
946	rtR3MemFree("FreeZ", RTMEMTYPE_RTMEMFREEZ, pv, cb, ASMReturnAddress(), RT_SRC_POS_ARGS);
947	}
948
949
950	RTDECL(void ) RTMemEfDup(const void pvSrc, size_t cb, const char *pszTag, RT_SRC_POS_DECL) RT_NO_THROW_DEF
951	{
952	void *pvDst = RTMemEfAlloc(cb, pszTag, RT_SRC_POS_ARGS);
953	if (pvDst)
954	memcpy(pvDst, pvSrc, cb);
955	return pvDst;
956	}
957
958
959	RTDECL(void ) RTMemEfDupEx(const void pvSrc, size_t cbSrc, size_t cbExtra, const char *pszTag, RT_SRC_POS_DECL) RT_NO_THROW_DEF
960	{
961	void *pvDst = RTMemEfAlloc(cbSrc + cbExtra, pszTag, RT_SRC_POS_ARGS);
962	if (pvDst)
963	{
964	memcpy(pvDst, pvSrc, cbSrc);
965	memset((uint8_t *)pvDst + cbSrc, 0, cbExtra);
966	}
967	return pvDst;
968	}
969
970
971
972
973	/*
974	*
975	* The NP (no position) versions.
976	*
977	*/
978
979
980
981	RTDECL(void ) RTMemEfTmpAllocNP(size_t cb, const char pszTag) RT_NO_THROW_DEF
982	{
983	return rtR3MemAlloc("TmpAlloc", RTMEMTYPE_RTMEMALLOC, cb, cb, pszTag, ASMReturnAddress(), NULL, 0, NULL);
984	}
985
986
987	RTDECL(void ) RTMemEfTmpAllocZNP(size_t cb, const char pszTag) RT_NO_THROW_DEF
988	{
989	return rtR3MemAlloc("TmpAllocZ", RTMEMTYPE_RTMEMALLOCZ, cb, cb, pszTag, ASMReturnAddress(), NULL, 0, NULL);
990	}
991
992
993	RTDECL(void) RTMemEfTmpFreeNP(void *pv) RT_NO_THROW_DEF
994	{
995	if (pv)
996	rtR3MemFree("Free", RTMEMTYPE_RTMEMFREE, pv, 0, ASMReturnAddress(), NULL, 0, NULL);
997	}
998
999
1000	RTDECL(void) RTMemEfTmpFreeZNP(void *pv, size_t cb) RT_NO_THROW_DEF
1001	{
1002	if (pv)
1003	rtR3MemFree("FreeZ", RTMEMTYPE_RTMEMFREEZ, pv, cb, ASMReturnAddress(), NULL, 0, NULL);
1004	}
1005
1006
1007	RTDECL(void ) RTMemEfAllocNP(size_t cb, const char pszTag) RT_NO_THROW_DEF
1008	{
1009	return rtR3MemAlloc("Alloc", RTMEMTYPE_RTMEMALLOC, cb, cb, pszTag, ASMReturnAddress(), NULL, 0, NULL);
1010	}
1011
1012
1013	RTDECL(void ) RTMemEfAllocZNP(size_t cb, const char pszTag) RT_NO_THROW_DEF
1014	{
1015	return rtR3MemAlloc("AllocZ", RTMEMTYPE_RTMEMALLOCZ, cb, cb, pszTag, ASMReturnAddress(), NULL, 0, NULL);
1016	}
1017
1018
1019	RTDECL(void ) RTMemEfAllocVarNP(size_t cbUnaligned, const char pszTag) RT_NO_THROW_DEF
1020	{
1021	size_t cbAligned;
1022	if (cbUnaligned >= 16)
1023	cbAligned = RT_ALIGN_Z(cbUnaligned, 16);
1024	else
1025	cbAligned = RT_ALIGN_Z(cbUnaligned, sizeof(void *));
1026	return rtR3MemAlloc("Alloc", RTMEMTYPE_RTMEMALLOC, cbUnaligned, cbAligned, pszTag, ASMReturnAddress(), NULL, 0, NULL);
1027	}
1028
1029
1030	RTDECL(void ) RTMemEfAllocZVarNP(size_t cbUnaligned, const char pszTag) RT_NO_THROW_DEF
1031	{
1032	size_t cbAligned;
1033	if (cbUnaligned >= 16)
1034	cbAligned = RT_ALIGN_Z(cbUnaligned, 16);
1035	else
1036	cbAligned = RT_ALIGN_Z(cbUnaligned, sizeof(void *));
1037	return rtR3MemAlloc("AllocZ", RTMEMTYPE_RTMEMALLOCZ, cbUnaligned, cbAligned, pszTag, ASMReturnAddress(), NULL, 0, NULL);
1038	}
1039
1040
1041	RTDECL(void ) RTMemEfReallocNP(void pvOld, size_t cbNew, const char *pszTag) RT_NO_THROW_DEF
1042	{
1043	return rtR3MemRealloc("Realloc", RTMEMTYPE_RTMEMREALLOC, pvOld, cbNew, pszTag, ASMReturnAddress(), NULL, 0, NULL);
1044	}
1045
1046
1047	RTDECL(void ) RTMemEfReallocZNP(void pvOld, size_t cbOld, size_t cbNew, const char *pszTag) RT_NO_THROW_DEF
1048	{
1049	void *pvDst = rtR3MemRealloc("ReallocZ", RTMEMTYPE_RTMEMREALLOC, pvOld, cbNew, pszTag, ASMReturnAddress(), NULL, 0, NULL);
1050	if (pvDst && cbNew > cbOld)
1051	memset((uint8_t *)pvDst + cbOld, 0, cbNew - cbOld);
1052	return pvDst;
1053	}
1054
1055
1056	RTDECL(void) RTMemEfFreeNP(void *pv) RT_NO_THROW_DEF
1057	{
1058	if (pv)
1059	rtR3MemFree("Free", RTMEMTYPE_RTMEMFREE, pv, 0, ASMReturnAddress(), NULL, 0, NULL);
1060	}
1061
1062
1063	RTDECL(void) RTMemEfFreeZNP(void *pv, size_t cb) RT_NO_THROW_DEF
1064	{
1065	if (pv)
1066	rtR3MemFree("Free", RTMEMTYPE_RTMEMFREEZ, pv, cb, ASMReturnAddress(), NULL, 0, NULL);
1067	}
1068
1069
1070	RTDECL(void ) RTMemEfDupNP(const void pvSrc, size_t cb, const char *pszTag) RT_NO_THROW_DEF
1071	{
1072	void *pvDst = RTMemEfAlloc(cb, pszTag, NULL, 0, NULL);
1073	if (pvDst)
1074	memcpy(pvDst, pvSrc, cb);
1075	return pvDst;
1076	}
1077
1078
1079	RTDECL(void ) RTMemEfDupExNP(const void pvSrc, size_t cbSrc, size_t cbExtra, const char *pszTag) RT_NO_THROW_DEF
1080	{
1081	void *pvDst = RTMemEfAlloc(cbSrc + cbExtra, pszTag, NULL, 0, NULL);
1082	if (pvDst)
1083	{
1084	memcpy(pvDst, pvSrc, cbSrc);
1085	memset((uint8_t *)pvDst + cbSrc, 0, cbExtra);
1086	}
1087	return pvDst;
1088	}
1089

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

source: vbox/trunk/src/VBox/Runtime/r3/alloc-ef.cpp@ 96507

Download in other formats: