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87 lines
2.9 KiB
87 lines
2.9 KiB
/* Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef MEMORY_DEBUGGING_INCLUDED
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#define MEMORY_DEBUGGING_INCLUDED
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/**
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@file memory_debugging.h
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Various macros useful for communicating with memory debuggers,
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such as Valgrind.
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*/
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#ifdef HAVE_VALGRIND
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#include <valgrind/valgrind.h>
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#define MEM_MALLOCLIKE_BLOCK(p1, p2, p3, p4) \
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VALGRIND_MALLOCLIKE_BLOCK(p1, p2, p3, p4)
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#define MEM_FREELIKE_BLOCK(p1, p2) VALGRIND_FREELIKE_BLOCK(p1, p2)
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#include <valgrind/memcheck.h>
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#define MEM_UNDEFINED(a, len) VALGRIND_MAKE_MEM_UNDEFINED(a, len)
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#define MEM_DEFINED_IF_ADDRESSABLE(a, len) \
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VALGRIND_MAKE_MEM_DEFINED_IF_ADDRESSABLE(a, len)
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#define MEM_NOACCESS(a, len) VALGRIND_MAKE_MEM_NOACCESS(a, len)
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#define MEM_CHECK_ADDRESSABLE(a, len) VALGRIND_CHECK_MEM_IS_ADDRESSABLE(a, len)
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#else /* HAVE_VALGRIND */
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#define MEM_MALLOCLIKE_BLOCK(p1, p2, p3, p4) \
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do { \
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} while (0)
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#define MEM_FREELIKE_BLOCK(p1, p2) \
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do { \
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} while (0)
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#define MEM_UNDEFINED(a, len) ((void)0)
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#define MEM_DEFINED_IF_ADDRESSABLE(a, len) ((void)0)
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#define MEM_NOACCESS(a, len) ((void)0)
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#define MEM_CHECK_ADDRESSABLE(a, len) ((void)0)
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#endif
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#if !defined(DBUG_OFF) || defined(HAVE_VALGRIND)
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/**
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Put bad content in memory to be sure it will segfault if dereferenced.
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With Valgrind, verify that memory is addressable, and mark it undefined.
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We cache value of B because if B is expression which depends on A, memset()
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trashes value of B.
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*/
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#define TRASH(A, B) \
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do { \
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void *p = (A); \
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const size_t l = (B); \
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MEM_CHECK_ADDRESSABLE(A, l); \
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memset(p, 0x8F, l); \
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MEM_UNDEFINED(A, l); \
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} while (0)
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#else
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#define TRASH(A, B) \
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do { \
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} while (0)
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#endif
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#endif // MEMORY_DEBUGGING_INCLUDED
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