1 2 /* 3 ---------------------------------------------------------------- 4 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. 10 11 ---------------------------------------------------------------- 12 13 This file is part of MemCheck, a heavyweight Valgrind tool for 14 detecting memory errors. 15 16 Copyright (C) 2000-2015 Julian Seward. All rights reserved. 17 18 Redistribution and use in source and binary forms, with or without 19 modification, are permitted provided that the following conditions 20 are met: 21 22 1. Redistributions of source code must retain the above copyright 23 notice, this list of conditions and the following disclaimer. 24 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. 29 30 3. Altered source versions must be plainly marked as such, and must 31 not be misrepresented as being the original software. 32 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 35 permission. 36 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. 48 49 ---------------------------------------------------------------- 50 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. 55 56 ---------------------------------------------------------------- 57 */ 58 59 60 #ifndef __MEMCHECK_H 61 #define __MEMCHECK_H 62 63 64 /* This file is for inclusion into client (your!) code. 65 66 You can use these macros to manipulate and query memory permissions 67 inside your own programs. 68 69 See comment near the top of valgrind.h on how to use them. 70 */ 71 72 #include "valgrind.h" 73 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. */ 78 typedef 79 enum { 80 VG_USERREQ__MAKE_MEM_NOACCESS = VG_USERREQ_TOOL_BASE('M','C'), 81 VG_USERREQ__MAKE_MEM_UNDEFINED, 82 VG_USERREQ__MAKE_MEM_DEFINED, 83 VG_USERREQ__DISCARD, 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, 88 89 VG_USERREQ__GET_VBITS, 90 VG_USERREQ__SET_VBITS, 91 92 VG_USERREQ__CREATE_BLOCK, 93 94 VG_USERREQ__MAKE_MEM_DEFINED_IF_ADDRESSABLE, 95 96 /* Not next to VG_USERREQ__COUNT_LEAKS because it was added later. */ 97 VG_USERREQ__COUNT_LEAK_BLOCKS, 98 99 VG_USERREQ__ENABLE_ADDR_ERROR_REPORTING_IN_RANGE, 100 VG_USERREQ__DISABLE_ADDR_ERROR_REPORTING_IN_RANGE, 101 102 /* This is just for memcheck's internal use - don't use it */ 103 _VG_USERREQ__MEMCHECK_RECORD_OVERLAP_ERROR 104 = VG_USERREQ_TOOL_BASE('M','C') + 256 105 } Vg_MemCheckClientRequest; 106 107 108 109 /* Client-code macros to manipulate the state of memory. */ 110 111 /* Mark memory at _qzz_addr as unaddressable for _qzz_len bytes. */ 112 #define VALGRIND_MAKE_MEM_NOACCESS(_qzz_addr,_qzz_len) \ 113 VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \ 114 VG_USERREQ__MAKE_MEM_NOACCESS, \ 115 (_qzz_addr), (_qzz_len), 0, 0, 0) 116 117 /* 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 VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \ 121 VG_USERREQ__MAKE_MEM_UNDEFINED, \ 122 (_qzz_addr), (_qzz_len), 0, 0, 0) 123 124 /* Similarly, mark memory at _qzz_addr as addressable and defined 125 for _qzz_len bytes. */ 126 #define VALGRIND_MAKE_MEM_DEFINED(_qzz_addr,_qzz_len) \ 127 VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \ 128 VG_USERREQ__MAKE_MEM_DEFINED, \ 129 (_qzz_addr), (_qzz_len), 0, 0, 0) 130 131 /* Similar to VALGRIND_MAKE_MEM_DEFINED except that addressability is 132 not altered: bytes which are addressable are marked as defined, 133 but those which are not addressable are left unchanged. */ 134 #define VALGRIND_MAKE_MEM_DEFINED_IF_ADDRESSABLE(_qzz_addr,_qzz_len) \ 135 VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \ 136 VG_USERREQ__MAKE_MEM_DEFINED_IF_ADDRESSABLE, \ 137 (_qzz_addr), (_qzz_len), 0, 0, 0) 138 139 /* Create a block-description handle. The description is an ascii 140 string which is included in any messages pertaining to addresses 141 within the specified memory range. Has no other effect on the 142 properties of the memory range. */ 143 #define VALGRIND_CREATE_BLOCK(_qzz_addr,_qzz_len, _qzz_desc) \ 144 VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \ 145 VG_USERREQ__CREATE_BLOCK, \ 146 (_qzz_addr), (_qzz_len), (_qzz_desc), \ 147 0, 0) 148 149 /* Discard a block-description-handle. Returns 1 for an 150 invalid handle, 0 for a valid handle. */ 151 #define VALGRIND_DISCARD(_qzz_blkindex) \ 152 VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \ 153 VG_USERREQ__DISCARD, \ 154 0, (_qzz_blkindex), 0, 0, 0) 155 156 157 /* Client-code macros to check the state of memory. */ 158 159 /* Check that memory at _qzz_addr is addressable for _qzz_len bytes. 160 If suitable addressibility is not established, Valgrind prints an 161 error message and returns the address of the first offending byte. 162 Otherwise it returns zero. */ 163 #define VALGRIND_CHECK_MEM_IS_ADDRESSABLE(_qzz_addr,_qzz_len) \ 164 VALGRIND_DO_CLIENT_REQUEST_EXPR(0, \ 165 VG_USERREQ__CHECK_MEM_IS_ADDRESSABLE, \ 166 (_qzz_addr), (_qzz_len), 0, 0, 0) 167 168 /* Check that memory at _qzz_addr is addressable and defined for 169 _qzz_len bytes. If suitable addressibility and definedness are not 170 established, Valgrind prints an error message and returns the 171 address of the first offending byte. Otherwise it returns zero. */ 172 #define VALGRIND_CHECK_MEM_IS_DEFINED(_qzz_addr,_qzz_len) \ 173 VALGRIND_DO_CLIENT_REQUEST_EXPR(0, \ 174 VG_USERREQ__CHECK_MEM_IS_DEFINED, \ 175 (_qzz_addr), (_qzz_len), 0, 0, 0) 176 177 /* Use this macro to force the definedness and addressibility of an 178 lvalue to be checked. If suitable addressibility and definedness 179 are not established, Valgrind prints an error message and returns 180 the address of the first offending byte. Otherwise it returns 181 zero. */ 182 #define VALGRIND_CHECK_VALUE_IS_DEFINED(__lvalue) \ 183 VALGRIND_CHECK_MEM_IS_DEFINED( \ 184 (volatile unsigned char *)&(__lvalue), \ 185 (unsigned long)(sizeof (__lvalue))) 186 187 188 /* Do a full memory leak check (like --leak-check=full) mid-execution. */ 189 #define VALGRIND_DO_LEAK_CHECK \ 190 VALGRIND_DO_CLIENT_REQUEST_STMT(VG_USERREQ__DO_LEAK_CHECK, \ 191 0, 0, 0, 0, 0) 192 193 /* Same as VALGRIND_DO_LEAK_CHECK but only showing the entries for 194 which there was an increase in leaked bytes or leaked nr of blocks 195 since the previous leak search. */ 196 #define VALGRIND_DO_ADDED_LEAK_CHECK \ 197 VALGRIND_DO_CLIENT_REQUEST_STMT(VG_USERREQ__DO_LEAK_CHECK, \ 198 0, 1, 0, 0, 0) 199 200 /* Same as VALGRIND_DO_ADDED_LEAK_CHECK but showing entries with 201 increased or decreased leaked bytes/blocks since previous leak 202 search. */ 203 #define VALGRIND_DO_CHANGED_LEAK_CHECK \ 204 VALGRIND_DO_CLIENT_REQUEST_STMT(VG_USERREQ__DO_LEAK_CHECK, \ 205 0, 2, 0, 0, 0) 206 207 /* Do a summary memory leak check (like --leak-check=summary) mid-execution. */ 208 #define VALGRIND_DO_QUICK_LEAK_CHECK \ 209 VALGRIND_DO_CLIENT_REQUEST_STMT(VG_USERREQ__DO_LEAK_CHECK, \ 210 1, 0, 0, 0, 0) 211 212 /* Return number of leaked, dubious, reachable and suppressed bytes found by 213 all previous leak checks. They must be lvalues. */ 214 #define VALGRIND_COUNT_LEAKS(leaked, dubious, reachable, suppressed) \ 215 /* For safety on 64-bit platforms we assign the results to private 216 unsigned long variables, then assign these to the lvalues the user 217 specified, which works no matter what type 'leaked', 'dubious', etc 218 are. We also initialise '_qzz_leaked', etc because 219 VG_USERREQ__COUNT_LEAKS doesn't mark the values returned as 220 defined. */ \ 221 { \ 222 unsigned long _qzz_leaked = 0, _qzz_dubious = 0; \ 223 unsigned long _qzz_reachable = 0, _qzz_suppressed = 0; \ 224 VALGRIND_DO_CLIENT_REQUEST_STMT( \ 225 VG_USERREQ__COUNT_LEAKS, \ 226 &_qzz_leaked, &_qzz_dubious, \ 227 &_qzz_reachable, &_qzz_suppressed, 0); \ 228 leaked = _qzz_leaked; \ 229 dubious = _qzz_dubious; \ 230 reachable = _qzz_reachable; \ 231 suppressed = _qzz_suppressed; \ 232 } 233 234 /* Return number of leaked, dubious, reachable and suppressed bytes found by 235 all previous leak checks. They must be lvalues. */ 236 #define VALGRIND_COUNT_LEAK_BLOCKS(leaked, dubious, reachable, suppressed) \ 237 /* For safety on 64-bit platforms we assign the results to private 238 unsigned long variables, then assign these to the lvalues the user 239 specified, which works no matter what type 'leaked', 'dubious', etc 240 are. We also initialise '_qzz_leaked', etc because 241 VG_USERREQ__COUNT_LEAKS doesn't mark the values returned as 242 defined. */ \ 243 { \ 244 unsigned long _qzz_leaked = 0, _qzz_dubious = 0; \ 245 unsigned long _qzz_reachable = 0, _qzz_suppressed = 0; \ 246 VALGRIND_DO_CLIENT_REQUEST_STMT( \ 247 VG_USERREQ__COUNT_LEAK_BLOCKS, \ 248 &_qzz_leaked, &_qzz_dubious, \ 249 &_qzz_reachable, &_qzz_suppressed, 0); \ 250 leaked = _qzz_leaked; \ 251 dubious = _qzz_dubious; \ 252 reachable = _qzz_reachable; \ 253 suppressed = _qzz_suppressed; \ 254 } 255 256 257 /* Get the validity data for addresses [zza..zza+zznbytes-1] and copy it 258 into the provided zzvbits array. Return values: 259 0 if not running on valgrind 260 1 success 261 2 [previously indicated unaligned arrays; these are now allowed] 262 3 if any parts of zzsrc/zzvbits are not addressable. 263 The metadata is not copied in cases 0, 2 or 3 so it should be 264 impossible to segfault your system by using this call. 265 */ 266 #define VALGRIND_GET_VBITS(zza,zzvbits,zznbytes) \ 267 (unsigned)VALGRIND_DO_CLIENT_REQUEST_EXPR(0, \ 268 VG_USERREQ__GET_VBITS, \ 269 (const char*)(zza), \ 270 (char*)(zzvbits), \ 271 (zznbytes), 0, 0) 272 273 /* Set the validity data for addresses [zza..zza+zznbytes-1], copying it 274 from the provided zzvbits array. Return values: 275 0 if not running on valgrind 276 1 success 277 2 [previously indicated unaligned arrays; these are now allowed] 278 3 if any parts of zza/zzvbits are not addressable. 279 The metadata is not copied in cases 0, 2 or 3 so it should be 280 impossible to segfault your system by using this call. 281 */ 282 #define VALGRIND_SET_VBITS(zza,zzvbits,zznbytes) \ 283 (unsigned)VALGRIND_DO_CLIENT_REQUEST_EXPR(0, \ 284 VG_USERREQ__SET_VBITS, \ 285 (const char*)(zza), \ 286 (const char*)(zzvbits), \ 287 (zznbytes), 0, 0 ) 288 289 /* Disable and re-enable reporting of addressing errors in the 290 specified address range. */ 291 #define VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE(_qzz_addr,_qzz_len) \ 292 VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \ 293 VG_USERREQ__DISABLE_ADDR_ERROR_REPORTING_IN_RANGE, \ 294 (_qzz_addr), (_qzz_len), 0, 0, 0) 295 296 #define VALGRIND_ENABLE_ADDR_ERROR_REPORTING_IN_RANGE(_qzz_addr,_qzz_len) \ 297 VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \ 298 VG_USERREQ__ENABLE_ADDR_ERROR_REPORTING_IN_RANGE, \ 299 (_qzz_addr), (_qzz_len), 0, 0, 0) 300 301 #endif 302 303