| |
| /* |
| ---------------------------------------------------------------- |
| |
| Notice that the following BSD-style license applies to this one |
| file (memcheck.h) only. The entire rest of Valgrind is licensed |
| under the terms of the GNU General Public License, version 2. See |
| the COPYING file in the source distribution for details. |
| |
| ---------------------------------------------------------------- |
| |
| This file is part of MemCheck, a heavyweight Valgrind skin for |
| detecting memory errors. |
| |
| Copyright (C) 2002-2003 Julian Seward. All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| |
| 1. Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| |
| 2. The origin of this software must not be misrepresented; you must |
| not claim that you wrote the original software. If you use this |
| software in a product, an acknowledgment in the product |
| documentation would be appreciated but is not required. |
| |
| 3. Altered source versions must be plainly marked as such, and must |
| not be misrepresented as being the original software. |
| |
| 4. The name of the author may not be used to endorse or promote |
| products derived from this software without specific prior written |
| permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS |
| OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| ---------------------------------------------------------------- |
| |
| Notice that the above BSD-style license applies to this one file |
| (memcheck.h) only. The entire rest of Valgrind is licensed under |
| the terms of the GNU General Public License, version 2. See the |
| COPYING file in the source distribution for details. |
| |
| ---------------------------------------------------------------- |
| */ |
| |
| |
| #ifndef __MEMCHECK_H |
| #define __MEMCHECK_H |
| |
| |
| /* This file is for inclusion into client (your!) code. |
| |
| You can use these macros to manipulate and query memory permissions |
| inside your own programs. |
| |
| See comment near the top of valgrind.h on how to use them. |
| */ |
| |
| #define __VALGRIND_SOMESKIN_H |
| #include "valgrind.h" |
| |
| typedef |
| enum { |
| VG_USERREQ__MAKE_NOACCESS = VG_USERREQ_SKIN_BASE('M','C'), |
| VG_USERREQ__MAKE_WRITABLE, |
| VG_USERREQ__MAKE_READABLE, |
| VG_USERREQ__DISCARD, |
| VG_USERREQ__CHECK_WRITABLE, |
| VG_USERREQ__CHECK_READABLE, |
| VG_USERREQ__DO_LEAK_CHECK, |
| VG_USERREQ__COUNT_LEAKS, |
| VG_USERREQ__MALLOCLIKE_BLOCK, |
| VG_USERREQ__FREELIKE_BLOCK, |
| } Vg_MemCheckClientRequest; |
| |
| |
| |
| /* Client-code macros to manipulate the state of memory. */ |
| |
| /* Mark memory at _qzz_addr as unaddressible and undefined for |
| _qzz_len bytes. Returns an int handle pertaining to the block |
| descriptions Valgrind will use in subsequent error messages. */ |
| #define VALGRIND_MAKE_NOACCESS(_qzz_addr,_qzz_len) \ |
| (__extension__({unsigned int _qzz_res; \ |
| VALGRIND_MAGIC_SEQUENCE(_qzz_res, 0 /* default return */, \ |
| VG_USERREQ__MAKE_NOACCESS, \ |
| _qzz_addr, _qzz_len, 0, 0); \ |
| _qzz_res; \ |
| })) |
| |
| /* Similarly, mark memory at _qzz_addr as addressible but undefined |
| for _qzz_len bytes. */ |
| #define VALGRIND_MAKE_WRITABLE(_qzz_addr,_qzz_len) \ |
| (__extension__({unsigned int _qzz_res; \ |
| VALGRIND_MAGIC_SEQUENCE(_qzz_res, 0 /* default return */, \ |
| VG_USERREQ__MAKE_WRITABLE, \ |
| _qzz_addr, _qzz_len, 0, 0); \ |
| _qzz_res; \ |
| })) |
| |
| /* Similarly, mark memory at _qzz_addr as addressible and defined |
| for _qzz_len bytes. */ |
| #define VALGRIND_MAKE_READABLE(_qzz_addr,_qzz_len) \ |
| (__extension__({unsigned int _qzz_res; \ |
| VALGRIND_MAGIC_SEQUENCE(_qzz_res, 0 /* default return */, \ |
| VG_USERREQ__MAKE_READABLE, \ |
| _qzz_addr, _qzz_len, 0, 0); \ |
| _qzz_res; \ |
| })) |
| |
| /* Discard a block-description-handle obtained from the above three |
| macros. After this, Valgrind will no longer be able to relate |
| addressing errors to the user-defined block associated with the |
| handle. The permissions settings associated with the handle remain |
| in place. Returns 1 for an invalid handle, 0 for a valid |
| handle. */ |
| #define VALGRIND_DISCARD(_qzz_blkindex) \ |
| (__extension__ ({unsigned int _qzz_res; \ |
| VALGRIND_MAGIC_SEQUENCE(_qzz_res, 0 /* default return */, \ |
| VG_USERREQ__DISCARD, \ |
| 0, _qzz_blkindex, 0, 0); \ |
| _qzz_res; \ |
| })) |
| |
| |
| /* Client-code macros to check the state of memory. */ |
| |
| /* Check that memory at _qzz_addr is addressible for _qzz_len bytes. |
| If suitable addressibility is not established, Valgrind prints an |
| error message and returns the address of the first offending byte. |
| Otherwise it returns zero. */ |
| #define VALGRIND_CHECK_WRITABLE(_qzz_addr,_qzz_len) \ |
| (__extension__({unsigned int _qzz_res; \ |
| VALGRIND_MAGIC_SEQUENCE(_qzz_res, 0, \ |
| VG_USERREQ__CHECK_WRITABLE, \ |
| _qzz_addr, _qzz_len, 0, 0); \ |
| _qzz_res; \ |
| })) |
| |
| /* Check that memory at _qzz_addr is addressible and defined for |
| _qzz_len bytes. If suitable addressibility and definedness are not |
| established, Valgrind prints an error message and returns the |
| address of the first offending byte. Otherwise it returns zero. */ |
| #define VALGRIND_CHECK_READABLE(_qzz_addr,_qzz_len) \ |
| (__extension__({unsigned int _qzz_res; \ |
| VALGRIND_MAGIC_SEQUENCE(_qzz_res, 0, \ |
| VG_USERREQ__CHECK_READABLE, \ |
| _qzz_addr, _qzz_len, 0, 0); \ |
| _qzz_res; \ |
| })) |
| |
| /* Use this macro to force the definedness and addressibility of a |
| value to be checked. If suitable addressibility and definedness |
| are not established, Valgrind prints an error message and returns |
| the address of the first offending byte. Otherwise it returns |
| zero. */ |
| #define VALGRIND_CHECK_DEFINED(__lvalue) \ |
| (void) \ |
| VALGRIND_CHECK_READABLE( \ |
| (volatile unsigned char *)&(__lvalue), \ |
| (unsigned int)(sizeof (__lvalue))) |
| |
| /* Mark a block of memory as having been allocated by a malloc()-like |
| function. `addr' is the start of the usable block (ie. after any |
| redzone) `rzB' is redzone size if the allocator can apply redzones; |
| use '0' if not. Adding redzones makes it more likely Valgrind will spot |
| block overruns. `is_zeroed' indicates if the memory is zeroed, as it is |
| for calloc(). Put it immediately after the point where a block is |
| allocated. |
| |
| If you're allocating memory via superblocks, and then handing out small |
| chunks of each superblock, if you don't have redzones on your small |
| blocks, it's worth marking the superblock with VALGRIND_MAKE_NOACCESS |
| when it's created, so that block overruns are detected. But if you can |
| put redzones on, it's probably better to not do this, so that messages |
| for small overruns are described in terms of the small block rather than |
| the superblock (but if you have a big overrun that skips over a redzone, |
| you could miss an error this way). See memcheck/tests/custom_alloc.c |
| for an example. |
| |
| Nb: block must be freed via a free()-like function specified |
| with VALGRIND_FREELIKE_BLOCK or mismatch errors will occur. */ |
| #define VALGRIND_MALLOCLIKE_BLOCK(addr, sizeB, rzB, is_zeroed) \ |
| {unsigned int _qzz_res; \ |
| VALGRIND_MAGIC_SEQUENCE(_qzz_res, 0, \ |
| VG_USERREQ__MALLOCLIKE_BLOCK, \ |
| addr, sizeB, rzB, is_zeroed); \ |
| } |
| |
| /* Mark a block of memory as having been freed by a free()-like function. |
| `rzB' is redzone size; it must match that given to |
| VALGRIND_MALLOCLIKE_BLOCK. Memory not freed will be detected by the leak |
| checker. Put it immediately after the point where the block is freed. */ |
| #define VALGRIND_FREELIKE_BLOCK(addr, rzB) \ |
| {unsigned int _qzz_res; \ |
| VALGRIND_MAGIC_SEQUENCE(_qzz_res, 0, \ |
| VG_USERREQ__FREELIKE_BLOCK, \ |
| addr, rzB, 0, 0); \ |
| } |
| |
| /* Do a memory leak check mid-execution. */ |
| #define VALGRIND_DO_LEAK_CHECK \ |
| {unsigned int _qzz_res; \ |
| VALGRIND_MAGIC_SEQUENCE(_qzz_res, 0, \ |
| VG_USERREQ__DO_LEAK_CHECK, \ |
| 0, 0, 0, 0); \ |
| } |
| |
| /* Return number of leaked, dubious, reachable and suppressed bytes found by |
| all previous leak checks. They must be lvalues. */ |
| #define VALGRIND_COUNT_LEAKS(leaked, dubious, reachable, suppressed) \ |
| {unsigned int _qzz_res; \ |
| VALGRIND_MAGIC_SEQUENCE(_qzz_res, 0, \ |
| VG_USERREQ__COUNT_LEAKS, \ |
| &leaked, &dubious, &reachable, &suppressed);\ |
| } |
| |
| #endif |