3 ----------------------------------------------------------------
5 Notice that the following BSD-style license applies to this one
6 file (memcheck.h) only. The rest of Valgrind is licensed under the
7 terms of the GNU General Public License, version 2, unless
8 otherwise indicated. See the COPYING file in the source
9 distribution for details.
11 ----------------------------------------------------------------
13 This file is part of MemCheck, a heavyweight Valgrind tool for
14 detecting memory errors.
16 Copyright (C) 2000-2009 Julian Seward. All rights reserved.
18 Redistribution and use in source and binary forms, with or without
19 modification, are permitted provided that the following conditions
22 1. Redistributions of source code must retain the above copyright
23 notice, this list of conditions and the following disclaimer.
25 2. The origin of this software must not be misrepresented; you must
26 not claim that you wrote the original software. If you use this
27 software in a product, an acknowledgment in the product
28 documentation would be appreciated but is not required.
30 3. Altered source versions must be plainly marked as such, and must
31 not be misrepresented as being the original software.
33 4. The name of the author may not be used to endorse or promote
34 products derived from this software without specific prior written
37 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
38 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
39 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
40 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
41 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
42 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
43 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
44 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
45 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
46 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
47 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
49 ----------------------------------------------------------------
51 Notice that the above BSD-style license applies to this one file
52 (memcheck.h) only. The entire rest of Valgrind is licensed under
53 the terms of the GNU General Public License, version 2. See the
54 COPYING file in the source distribution for details.
56 ----------------------------------------------------------------
64 /* This file is for inclusion into client (your!) code.
66 You can use these macros to manipulate and query memory permissions
67 inside your own programs.
69 See comment near the top of valgrind.h on how to use them.
74 /* !! ABIWARNING !! ABIWARNING !! ABIWARNING !! ABIWARNING !!
75 This enum comprises an ABI exported by Valgrind to programs
76 which use client requests. DO NOT CHANGE THE ORDER OF THESE
77 ENTRIES, NOR DELETE ANY -- add new ones at the end. */
80 VG_USERREQ__MAKE_MEM_NOACCESS = VG_USERREQ_TOOL_BASE('M','C'),
81 VG_USERREQ__MAKE_MEM_UNDEFINED,
82 VG_USERREQ__MAKE_MEM_DEFINED,
84 VG_USERREQ__CHECK_MEM_IS_ADDRESSABLE,
85 VG_USERREQ__CHECK_MEM_IS_DEFINED,
86 VG_USERREQ__DO_LEAK_CHECK,
87 VG_USERREQ__COUNT_LEAKS,
89 VG_USERREQ__GET_VBITS,
90 VG_USERREQ__SET_VBITS,
92 VG_USERREQ__CREATE_BLOCK,
94 VG_USERREQ__MAKE_MEM_DEFINED_IF_ADDRESSABLE,
96 /* Not next to VG_USERREQ__COUNT_LEAKS because it was added later. */
97 VG_USERREQ__COUNT_LEAK_BLOCKS,
99 /* This is just for memcheck's internal use - don't use it */
100 _VG_USERREQ__MEMCHECK_RECORD_OVERLAP_ERROR
101 = VG_USERREQ_TOOL_BASE('M','C') + 256
102 } Vg_MemCheckClientRequest;
106 /* Client-code macros to manipulate the state of memory. */
108 /* Mark memory at _qzz_addr as unaddressable for _qzz_len bytes. */
109 #define VALGRIND_MAKE_MEM_NOACCESS(_qzz_addr,_qzz_len) \
110 (__extension__({unsigned long _qzz_res; \
111 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0 /* default return */, \
112 VG_USERREQ__MAKE_MEM_NOACCESS, \
113 _qzz_addr, _qzz_len, 0, 0, 0); \
117 /* Similarly, mark memory at _qzz_addr as addressable but undefined
118 for _qzz_len bytes. */
119 #define VALGRIND_MAKE_MEM_UNDEFINED(_qzz_addr,_qzz_len) \
120 (__extension__({unsigned long _qzz_res; \
121 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0 /* default return */, \
122 VG_USERREQ__MAKE_MEM_UNDEFINED, \
123 _qzz_addr, _qzz_len, 0, 0, 0); \
127 /* Similarly, mark memory at _qzz_addr as addressable and defined
128 for _qzz_len bytes. */
129 #define VALGRIND_MAKE_MEM_DEFINED(_qzz_addr,_qzz_len) \
130 (__extension__({unsigned long _qzz_res; \
131 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0 /* default return */, \
132 VG_USERREQ__MAKE_MEM_DEFINED, \
133 _qzz_addr, _qzz_len, 0, 0, 0); \
137 /* Similar to VALGRIND_MAKE_MEM_DEFINED except that addressability is
138 not altered: bytes which are addressable are marked as defined,
139 but those which are not addressable are left unchanged. */
140 #define VALGRIND_MAKE_MEM_DEFINED_IF_ADDRESSABLE(_qzz_addr,_qzz_len) \
141 (__extension__({unsigned long _qzz_res; \
142 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0 /* default return */, \
143 VG_USERREQ__MAKE_MEM_DEFINED_IF_ADDRESSABLE, \
144 _qzz_addr, _qzz_len, 0, 0, 0); \
148 /* Create a block-description handle. The description is an ascii
149 string which is included in any messages pertaining to addresses
150 within the specified memory range. Has no other effect on the
151 properties of the memory range. */
152 #define VALGRIND_CREATE_BLOCK(_qzz_addr,_qzz_len, _qzz_desc) \
153 (__extension__({unsigned long _qzz_res; \
154 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0 /* default return */, \
155 VG_USERREQ__CREATE_BLOCK, \
156 _qzz_addr, _qzz_len, _qzz_desc, \
161 /* Discard a block-description-handle. Returns 1 for an
162 invalid handle, 0 for a valid handle. */
163 #define VALGRIND_DISCARD(_qzz_blkindex) \
164 (__extension__ ({unsigned long _qzz_res; \
165 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0 /* default return */, \
166 VG_USERREQ__DISCARD, \
167 0, _qzz_blkindex, 0, 0, 0); \
172 /* Client-code macros to check the state of memory. */
174 /* Check that memory at _qzz_addr is addressable for _qzz_len bytes.
175 If suitable addressibility is not established, Valgrind prints an
176 error message and returns the address of the first offending byte.
177 Otherwise it returns zero. */
178 #define VALGRIND_CHECK_MEM_IS_ADDRESSABLE(_qzz_addr,_qzz_len) \
179 (__extension__({unsigned long _qzz_res; \
180 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0, \
181 VG_USERREQ__CHECK_MEM_IS_ADDRESSABLE,\
182 _qzz_addr, _qzz_len, 0, 0, 0); \
186 /* Check that memory at _qzz_addr is addressable and defined for
187 _qzz_len bytes. If suitable addressibility and definedness are not
188 established, Valgrind prints an error message and returns the
189 address of the first offending byte. Otherwise it returns zero. */
190 #define VALGRIND_CHECK_MEM_IS_DEFINED(_qzz_addr,_qzz_len) \
191 (__extension__({unsigned long _qzz_res; \
192 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0, \
193 VG_USERREQ__CHECK_MEM_IS_DEFINED, \
194 _qzz_addr, _qzz_len, 0, 0, 0); \
198 /* Use this macro to force the definedness and addressibility of an
199 lvalue to be checked. If suitable addressibility and definedness
200 are not established, Valgrind prints an error message and returns
201 the address of the first offending byte. Otherwise it returns
203 #define VALGRIND_CHECK_VALUE_IS_DEFINED(__lvalue) \
204 VALGRIND_CHECK_MEM_IS_DEFINED( \
205 (volatile unsigned char *)&(__lvalue), \
206 (unsigned long)(sizeof (__lvalue)))
209 /* Do a full memory leak check (like --leak-check=full) mid-execution. */
210 #define VALGRIND_DO_LEAK_CHECK \
211 {unsigned long _qzz_res; \
212 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0, \
213 VG_USERREQ__DO_LEAK_CHECK, \
217 /* Do a summary memory leak check (like --leak-check=summary) mid-execution. */
218 #define VALGRIND_DO_QUICK_LEAK_CHECK \
219 {unsigned long _qzz_res; \
220 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0, \
221 VG_USERREQ__DO_LEAK_CHECK, \
225 /* Return number of leaked, dubious, reachable and suppressed bytes found by
226 all previous leak checks. They must be lvalues. */
227 #define VALGRIND_COUNT_LEAKS(leaked, dubious, reachable, suppressed) \
228 /* For safety on 64-bit platforms we assign the results to private
229 unsigned long variables, then assign these to the lvalues the user
230 specified, which works no matter what type 'leaked', 'dubious', etc
231 are. We also initialise '_qzz_leaked', etc because
232 VG_USERREQ__COUNT_LEAKS doesn't mark the values returned as
234 {unsigned long _qzz_res; \
235 unsigned long _qzz_leaked = 0, _qzz_dubious = 0; \
236 unsigned long _qzz_reachable = 0, _qzz_suppressed = 0; \
237 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0, \
238 VG_USERREQ__COUNT_LEAKS, \
239 &_qzz_leaked, &_qzz_dubious, \
240 &_qzz_reachable, &_qzz_suppressed, 0); \
241 leaked = _qzz_leaked; \
242 dubious = _qzz_dubious; \
243 reachable = _qzz_reachable; \
244 suppressed = _qzz_suppressed; \
247 /* Return number of leaked, dubious, reachable and suppressed bytes found by
248 all previous leak checks. They must be lvalues. */
249 #define VALGRIND_COUNT_LEAK_BLOCKS(leaked, dubious, reachable, suppressed) \
250 /* For safety on 64-bit platforms we assign the results to private
251 unsigned long variables, then assign these to the lvalues the user
252 specified, which works no matter what type 'leaked', 'dubious', etc
253 are. We also initialise '_qzz_leaked', etc because
254 VG_USERREQ__COUNT_LEAKS doesn't mark the values returned as
256 {unsigned long _qzz_res; \
257 unsigned long _qzz_leaked = 0, _qzz_dubious = 0; \
258 unsigned long _qzz_reachable = 0, _qzz_suppressed = 0; \
259 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0, \
260 VG_USERREQ__COUNT_LEAK_BLOCKS, \
261 &_qzz_leaked, &_qzz_dubious, \
262 &_qzz_reachable, &_qzz_suppressed, 0); \
263 leaked = _qzz_leaked; \
264 dubious = _qzz_dubious; \
265 reachable = _qzz_reachable; \
266 suppressed = _qzz_suppressed; \
270 /* Get the validity data for addresses [zza..zza+zznbytes-1] and copy it
271 into the provided zzvbits array. Return values:
272 0 if not running on valgrind
274 2 [previously indicated unaligned arrays; these are now allowed]
275 3 if any parts of zzsrc/zzvbits are not addressable.
276 The metadata is not copied in cases 0, 2 or 3 so it should be
277 impossible to segfault your system by using this call.
279 #define VALGRIND_GET_VBITS(zza,zzvbits,zznbytes) \
280 (__extension__({unsigned long _qzz_res; \
281 char* czza = (char*)zza; \
282 char* czzvbits = (char*)zzvbits; \
283 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0, \
284 VG_USERREQ__GET_VBITS, \
285 czza, czzvbits, zznbytes, 0, 0 ); \
289 /* Set the validity data for addresses [zza..zza+zznbytes-1], copying it
290 from the provided zzvbits array. Return values:
291 0 if not running on valgrind
293 2 [previously indicated unaligned arrays; these are now allowed]
294 3 if any parts of zza/zzvbits are not addressable.
295 The metadata is not copied in cases 0, 2 or 3 so it should be
296 impossible to segfault your system by using this call.
298 #define VALGRIND_SET_VBITS(zza,zzvbits,zznbytes) \
299 (__extension__({unsigned int _qzz_res; \
300 char* czza = (char*)zza; \
301 char* czzvbits = (char*)zzvbits; \
302 VALGRIND_DO_CLIENT_REQUEST(_qzz_res, 0, \
303 VG_USERREQ__SET_VBITS, \
304 czza, czzvbits, zznbytes, 0, 0 ); \