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ftmemsim-valgrind/memcheck/memcheck.h
Nicholas Nethercote 1b48c55fc5 Added two client requests: VALGRIND_COUNT_ERRORS and VALGRIND_COUNT_LEAKS. 
The first returns the number of errors found so far, and is a core request.
The second returns the number of bytes found
reachable/dubious/leaked/suppressed by all leak checks so far, for Memcheck and
Addrcheck.

Both are useful for using Valgrind in regression test suites where multiple
tests are present in a single file -- one can run Valgrind with no output
(using --logfile-fd=-1) and use the requests after each test to determine if
any errors happened.

Had to rename and make public vg_n_errs_found --> VG_(n_errs_found) to do so.
Nb: leak errors are not counted as errors for the purposes of
VALGRIND_COUNT_ERRORS.  This was decided as the best thing to do after
discussion with Olly Betts, who original suggested these changes.

Pulled out common client request code shared between Memcheck and Addrcheck.

Added a regression test for this.

Added some documentation too.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@1533
2003-04-21 13:24:40 +00:00

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/*
----------------------------------------------------------------
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_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)))
/* 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
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