alloc.cpp@ 95512

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1	/* $Id: alloc.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* IPRT - Memory Allocation.
4	*/
5
6	/*
7	* Copyright (C) 2006-2022 Oracle Corporation
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	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Defined Constants And Macros *
30	*********************************************************************************************************************************/
31	#if defined(RTMEM_WRAP_TO_EF_APIS) && !defined(RTMEM_NO_WRAP_TO_EF_APIS)
32	# undef RTMEM_WRAP_TO_EF_APIS
33	# define RTALLOC_USE_EFENCE 1
34	#endif
35
36	/#define RTMEMALLOC_USE_TRACKER/
37	/* Don't enable the tracker when building the minimal IPRT. */
38	#ifdef RT_MINI
39	# undef RTMEMALLOC_USE_TRACKER
40	#endif
41
42	#if defined(RTMEMALLOC_USE_TRACKER) && defined(RTALLOC_USE_EFENCE)
43	# error "Cannot define both RTMEMALLOC_USE_TRACKER and RTALLOC_USE_EFENCE!"
44	#endif
45
46
47	/*********************************************************************************************************************************
48	* Header Files *
49	*********************************************************************************************************************************/
50	#include "alloc-ef.h"
51	#include <iprt/mem.h>
52
53	#include <iprt/asm.h>
54	#include <iprt/assert.h>
55	#ifdef RTMEMALLOC_USE_TRACKER
56	# include <iprt/memtracker.h>
57	#endif
58	#include <iprt/param.h>
59	#include <iprt/string.h>
60	#include "internal/mem.h"
61
62	#include <stdlib.h>
63
64	#undef RTMemTmpAlloc
65	#undef RTMemTmpAllocTag
66	#undef RTMemTmpAllocZ
67	#undef RTMemTmpAllocZTag
68	#undef RTMemTmpFree
69	#undef RTMemTmpFreeZ
70	#undef RTMemAlloc
71	#undef RTMemAllocTag
72	#undef RTMemAllocZ
73	#undef RTMemAllocZTag
74	#undef RTMemAllocVar
75	#undef RTMemAllocVarTag
76	#undef RTMemAllocZVar
77	#undef RTMemAllocZVarTag
78	#undef RTMemRealloc
79	#undef RTMemReallocTag
80	#undef RTMemFree
81	#undef RTMemFreeZ
82	#undef RTMemDup
83	#undef RTMemDupTag
84	#undef RTMemDupEx
85	#undef RTMemDupExTag
86
87	#undef RTALLOC_USE_EFENCE
88
89
90	#ifdef IPRT_WITH_GCC_SANITIZER
91	/**
92	* Checks if @a pszTag is a leak tag.
93	*
94	* @returns true if leak tag, false if not.
95	* @param pszTag Tage to inspect.
96	*/
97	DECLINLINE(bool) rtMemIsLeakTag(const char *pszTag)
98	{
99	char ch = *pszTag;
100	if (ch != 'w')
101	{ /* likely */ }
102	else
103	return pszTag[1] == 'i'
104	&& pszTag[2] == 'l'
105	&& pszTag[3] == 'l'
106	&& pszTag[4] == '-'
107	&& pszTag[5] == 'l'
108	&& pszTag[6] == 'e'
109	&& pszTag[7] == 'a'
110	&& pszTag[8] == 'k';
111	if (ch != 'm')
112	return false;
113	return pszTag[1] == 'm'
114	&& pszTag[2] == 'a'
115	&& pszTag[3] == 'y'
116	&& pszTag[4] == '-'
117	&& pszTag[5] == 'l'
118	&& pszTag[6] == 'e'
119	&& pszTag[7] == 'a'
120	&& pszTag[8] == 'k';
121	}
122	#endif /* IPRT_WITH_GCC_SANITIZER */
123
124
125	RTDECL(void ) RTMemTmpAllocTag(size_t cb, const char pszTag) RT_NO_THROW_DEF
126	{
127	return RTMemAllocTag(cb, pszTag);
128	}
129
130
131	RTDECL(void ) RTMemTmpAllocZTag(size_t cb, const char pszTag) RT_NO_THROW_DEF
132	{
133	return RTMemAllocZTag(cb, pszTag);
134	}
135
136
137	RTDECL(void) RTMemTmpFree(void *pv) RT_NO_THROW_DEF
138	{
139	RTMemFree(pv);
140	}
141
142
143	RTDECL(void) RTMemTmpFreeZ(void *pv, size_t cb) RT_NO_THROW_DEF
144	{
145	RTMemFreeZ(pv, cb);
146	}
147
148
149	RTDECL(void ) RTMemAllocTag(size_t cb, const char pszTag) RT_NO_THROW_DEF
150	{
151	#ifdef RTALLOC_USE_EFENCE
152	void *pv = rtR3MemAlloc("Alloc", RTMEMTYPE_RTMEMALLOC, cb, cb, pszTag, ASMReturnAddress(), NULL, 0, NULL);
153
154	#else /* !RTALLOC_USE_EFENCE */
155
156	AssertMsg(cb, ("Allocating ZERO bytes is really not a good idea! Good luck with the next assertion!\n"));
157	# ifdef RTMEMALLOC_USE_TRACKER
158	void *pv = RTMemTrackerHdrAlloc(malloc(cb + sizeof(RTMEMTRACKERHDR)), cb, pszTag, ASMReturnAddress(), RTMEMTRACKERMETHOD_ALLOC);
159	# else
160	void *pv = malloc(cb); NOREF(pszTag);
161	# endif
162	AssertMsg(pv, ("malloc(%#zx) failed!!!\n", cb));
163	AssertMsg( cb < RTMEM_ALIGNMENT
164	\|\| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1))
165	\|\| ( (cb & RTMEM_ALIGNMENT) + ((uintptr_t)pv & RTMEM_ALIGNMENT)) == RTMEM_ALIGNMENT
166	, ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
167	#endif /* !RTALLOC_USE_EFENCE */
168	#ifdef IPRT_WITH_GCC_SANITIZER
169	if (rtMemIsLeakTag(pszTag))
170	__lsan_ignore_object(pv);
171	#endif
172	return pv;
173	}
174
175
176	RTDECL(void ) RTMemAllocZTag(size_t cb, const char pszTag) RT_NO_THROW_DEF
177	{
178	#ifdef RTALLOC_USE_EFENCE
179	void *pv = rtR3MemAlloc("AllocZ", RTMEMTYPE_RTMEMALLOCZ, cb, cb, pszTag, ASMReturnAddress(), NULL, 0, NULL);
180
181	#else /* !RTALLOC_USE_EFENCE */
182
183	AssertMsg(cb, ("Allocating ZERO bytes is really not a good idea! Good luck with the next assertion!\n"));
184
185	# ifdef RTMEMALLOC_USE_TRACKER
186	void *pv = RTMemTrackerHdrAlloc(calloc(1, cb + sizeof(RTMEMTRACKERHDR)), cb, pszTag, ASMReturnAddress(), RTMEMTRACKERMETHOD_ALLOCZ);
187	#else
188	void *pv = calloc(1, cb); NOREF(pszTag);
189	#endif
190	AssertMsg(pv, ("calloc(1,%#zx) failed!!!\n", cb));
191	AssertMsg( cb < RTMEM_ALIGNMENT
192	\|\| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1))
193	\|\| ( (cb & RTMEM_ALIGNMENT) + ((uintptr_t)pv & RTMEM_ALIGNMENT)) == RTMEM_ALIGNMENT
194	, ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
195	#endif /* !RTALLOC_USE_EFENCE */
196	#ifdef IPRT_WITH_GCC_SANITIZER
197	if (rtMemIsLeakTag(pszTag))
198	__lsan_ignore_object(pv);
199	#endif
200	return pv;
201	}
202
203
204	RTDECL(void ) RTMemAllocVarTag(size_t cbUnaligned, const char pszTag) RT_NO_THROW_DEF
205	{
206	size_t cbAligned;
207	if (cbUnaligned >= 16)
208	cbAligned = RT_ALIGN_Z(cbUnaligned, 16);
209	else
210	cbAligned = RT_ALIGN_Z(cbUnaligned, sizeof(void *));
211	#ifdef RTALLOC_USE_EFENCE
212	void *pv = rtR3MemAlloc("AllocVar", RTMEMTYPE_RTMEMALLOC, cbUnaligned, cbAligned, pszTag, ASMReturnAddress(), NULL, 0, NULL);
213	#else
214	void *pv = RTMemAllocTag(cbAligned, pszTag);
215	#endif
216	return pv;
217	}
218
219
220	RTDECL(void ) RTMemAllocZVarTag(size_t cbUnaligned, const char pszTag) RT_NO_THROW_DEF
221	{
222	size_t cbAligned;
223	if (cbUnaligned >= 16)
224	cbAligned = RT_ALIGN_Z(cbUnaligned, 16);
225	else
226	cbAligned = RT_ALIGN_Z(cbUnaligned, sizeof(void *));
227	#ifdef RTALLOC_USE_EFENCE
228	void *pv = rtR3MemAlloc("AllocZVar", RTMEMTYPE_RTMEMALLOCZ, cbUnaligned, cbAligned, pszTag, ASMReturnAddress(), NULL, 0, NULL);
229	#else
230	void *pv = RTMemAllocZTag(cbAligned, pszTag);
231	#endif
232	return pv;
233	}
234
235
236	RTDECL(void ) RTMemReallocTag(void pvOld, size_t cbNew, const char *pszTag) RT_NO_THROW_DEF
237	{
238	#ifdef RTALLOC_USE_EFENCE
239	void *pv = rtR3MemRealloc("Realloc", RTMEMTYPE_RTMEMREALLOC, pvOld, cbNew, pszTag, ASMReturnAddress(), NULL, 0, NULL);
240
241	#else /* !RTALLOC_USE_EFENCE */
242
243	# ifdef RTMEMALLOC_USE_TRACKER
244	void *pvRealOld = RTMemTrackerHdrReallocPrep(pvOld, 0, pszTag, ASMReturnAddress());
245	size_t cbRealNew = cbNew \|\| !pvRealOld ? cbNew + sizeof(RTMEMTRACKERHDR) : 0;
246	void *pvNew = realloc(pvRealOld, cbRealNew);
247	void *pv = RTMemTrackerHdrReallocDone(pvNew, cbNew, pvOld, pszTag, ASMReturnAddress());
248	# else
249	void *pv = realloc(pvOld, cbNew); NOREF(pszTag);
250	# endif
251	AssertMsg(pv \|\| !cbNew, ("realloc(%p, %#zx) failed!!!\n", pvOld, cbNew));
252	AssertMsg( cbNew < RTMEM_ALIGNMENT
253	\|\| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1))
254	\|\| ( (cbNew & RTMEM_ALIGNMENT) + ((uintptr_t)pv & RTMEM_ALIGNMENT)) == RTMEM_ALIGNMENT
255	, ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
256	#endif /* !RTALLOC_USE_EFENCE */
257	return pv;
258	}
259
260
261	RTDECL(void) RTMemFree(void *pv) RT_NO_THROW_DEF
262	{
263	if (pv)
264	#ifdef RTALLOC_USE_EFENCE
265	rtR3MemFree("Free", RTMEMTYPE_RTMEMFREE, pv, 0, ASMReturnAddress(), NULL, 0, NULL);
266	#else
267	# ifdef RTMEMALLOC_USE_TRACKER
268	pv = RTMemTrackerHdrFree(pv, 0, NULL, ASMReturnAddress(), RTMEMTRACKERMETHOD_FREE);
269	# endif
270	free(pv);
271	#endif
272	}
273
274
275	RTDECL(void) RTMemFreeZ(void *pv, size_t cb) RT_NO_THROW_DEF
276	{
277	if (pv)
278	{
279	#ifdef RTALLOC_USE_EFENCE
280	rtR3MemFree("Free", RTMEMTYPE_RTMEMFREEZ, pv, cb, ASMReturnAddress(), NULL, 0, NULL);
281	#else
282	# ifdef RTMEMALLOC_USE_TRACKER
283	pv = RTMemTrackerHdrFree(pv, cb, NULL, ASMReturnAddress(), RTMEMTRACKERMETHOD_FREE);
284	# endif
285	RT_BZERO(pv, cb);
286	free(pv);
287	#endif
288	}
289	}
290
291
292
293	DECLHIDDEN(void *) rtMemBaseAlloc(size_t cb)
294	{
295	Assert(cb > 0 && cb < _1M);
296	return malloc(cb);
297	}
298
299
300	DECLHIDDEN(void) rtMemBaseFree(void *pv)
301	{
302	free(pv);
303	}
304

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source: vbox/trunk/src/VBox/Runtime/r3/alloc.cpp@ 95512

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