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e48195c816
Since we use a limited set of kmem caches, quite often we have unused memory after the end of the buffer. Put there up to a 512-byte canary when built with debug to detect buffer overflows at the free time. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Sponsored by: iXsystems, Inc. Closes #15553
166 lines
5.2 KiB
C
166 lines
5.2 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#include_next <assert.h>
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#ifndef _LIBSPL_ASSERT_H
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#define _LIBSPL_ASSERT_H
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <sys/types.h>
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/* Workaround for non-Clang compilers */
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#ifndef __has_feature
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#define __has_feature(x) 0
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#endif
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/* We need to workaround libspl_set_assert_ok() that we have for zdb */
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#if __has_feature(attribute_analyzer_noreturn) || defined(__COVERITY__)
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#define NORETURN __attribute__((__noreturn__))
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#else
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#define NORETURN
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#endif
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/* Set to non-zero to avoid abort()ing on an assertion failure */
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extern void libspl_set_assert_ok(boolean_t val);
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/* printf version of libspl_assert */
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extern void libspl_assertf(const char *file, const char *func, int line,
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const char *format, ...) NORETURN __attribute__((format(printf, 4, 5)));
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static inline int
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libspl_assert(const char *buf, const char *file, const char *func, int line)
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{
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libspl_assertf(file, func, line, "%s", buf);
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return (0);
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}
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#ifdef verify
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#undef verify
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#endif
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#define PANIC(fmt, a...) \
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libspl_assertf(__FILE__, __FUNCTION__, __LINE__, fmt, ## a)
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#define VERIFY(cond) \
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(void) ((!(cond)) && \
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libspl_assert(#cond, __FILE__, __FUNCTION__, __LINE__))
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#define verify(cond) \
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(void) ((!(cond)) && \
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libspl_assert(#cond, __FILE__, __FUNCTION__, __LINE__))
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#define VERIFY3B(LEFT, OP, RIGHT) \
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do { \
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const boolean_t __left = (boolean_t)(LEFT); \
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const boolean_t __right = (boolean_t)(RIGHT); \
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if (!(__left OP __right)) \
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libspl_assertf(__FILE__, __FUNCTION__, __LINE__, \
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"%s %s %s (0x%llx %s 0x%llx)", #LEFT, #OP, #RIGHT, \
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(u_longlong_t)__left, #OP, (u_longlong_t)__right); \
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} while (0)
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#define VERIFY3S(LEFT, OP, RIGHT) \
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do { \
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const int64_t __left = (int64_t)(LEFT); \
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const int64_t __right = (int64_t)(RIGHT); \
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if (!(__left OP __right)) \
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libspl_assertf(__FILE__, __FUNCTION__, __LINE__, \
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"%s %s %s (0x%llx %s 0x%llx)", #LEFT, #OP, #RIGHT, \
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(u_longlong_t)__left, #OP, (u_longlong_t)__right); \
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} while (0)
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#define VERIFY3U(LEFT, OP, RIGHT) \
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do { \
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const uint64_t __left = (uint64_t)(LEFT); \
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const uint64_t __right = (uint64_t)(RIGHT); \
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if (!(__left OP __right)) \
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libspl_assertf(__FILE__, __FUNCTION__, __LINE__, \
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"%s %s %s (0x%llx %s 0x%llx)", #LEFT, #OP, #RIGHT, \
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(u_longlong_t)__left, #OP, (u_longlong_t)__right); \
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} while (0)
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#define VERIFY3P(LEFT, OP, RIGHT) \
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do { \
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const uintptr_t __left = (uintptr_t)(LEFT); \
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const uintptr_t __right = (uintptr_t)(RIGHT); \
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if (!(__left OP __right)) \
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libspl_assertf(__FILE__, __FUNCTION__, __LINE__, \
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"%s %s %s (0x%llx %s 0x%llx)", #LEFT, #OP, #RIGHT, \
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(u_longlong_t)__left, #OP, (u_longlong_t)__right); \
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} while (0)
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#define VERIFY0(LEFT) \
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do { \
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const uint64_t __left = (uint64_t)(LEFT); \
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if (!(__left == 0)) \
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libspl_assertf(__FILE__, __FUNCTION__, __LINE__, \
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"%s == 0 (0x%llx == 0)", #LEFT, \
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(u_longlong_t)__left); \
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} while (0)
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#ifdef assert
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#undef assert
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#endif
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#ifdef NDEBUG
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#define ASSERT3B(x, y, z) \
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((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z)))
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#define ASSERT3S(x, y, z) \
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((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z)))
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#define ASSERT3U(x, y, z) \
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((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z)))
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#define ASSERT3P(x, y, z) \
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((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z)))
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#define ASSERT0(x) ((void) sizeof ((uintptr_t)(x)))
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#define ASSERT(x) ((void) sizeof ((uintptr_t)(x)))
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#define assert(x) ((void) sizeof ((uintptr_t)(x)))
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#define IMPLY(A, B) \
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((void) sizeof ((uintptr_t)(A)), (void) sizeof ((uintptr_t)(B)))
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#define EQUIV(A, B) \
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((void) sizeof ((uintptr_t)(A)), (void) sizeof ((uintptr_t)(B)))
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#else
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#define ASSERT3B VERIFY3B
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#define ASSERT3S VERIFY3S
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#define ASSERT3U VERIFY3U
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#define ASSERT3P VERIFY3P
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#define ASSERT0 VERIFY0
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#define ASSERT VERIFY
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#define assert VERIFY
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#define IMPLY(A, B) \
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((void)(((!(A)) || (B)) || \
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libspl_assert("(" #A ") implies (" #B ")", \
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__FILE__, __FUNCTION__, __LINE__)))
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#define EQUIV(A, B) \
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((void)((!!(A) == !!(B)) || \
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libspl_assert("(" #A ") is equivalent to (" #B ")", \
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__FILE__, __FUNCTION__, __LINE__)))
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#endif /* NDEBUG */
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#endif /* _LIBSPL_ASSERT_H */
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