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/*
* Copyright (c) 2020 iXsystems, Inc.
* 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. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``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 AUTHORS OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
/*
* Available Solaris debug functions. All of the ASSERT() macros will be
* compiled out when NDEBUG is defined, this is the default behavior for
* the SPL. To enable assertions use the --enable-debug with configure.
* The VERIFY() functions are never compiled out and cannot be disabled.
*
* PANIC() - Panic the node and print message.
* ASSERT() - Assert X is true, if not panic.
* ASSERT3B() - Assert boolean X OP Y is true, if not panic.
* ASSERT3S() - Assert signed X OP Y is true, if not panic.
* ASSERT3U() - Assert unsigned X OP Y is true, if not panic.
* ASSERT3P() - Assert pointer X OP Y is true, if not panic.
* ASSERT0() - Assert value is zero, if not panic.
* ASSERT0P() - Assert pointer is null, if not panic.
* VERIFY() - Verify X is true, if not panic.
* VERIFY3B() - Verify boolean X OP Y is true, if not panic.
* VERIFY3S() - Verify signed X OP Y is true, if not panic.
* VERIFY3U() - Verify unsigned X OP Y is true, if not panic.
* VERIFY3P() - Verify pointer X OP Y is true, if not panic.
* VERIFY0() - Verify value is zero, if not panic.
* VERIFY0P() - Verify pointer is null, if not panic.
*/
#ifndef _SPL_DEBUG_H
#define _SPL_DEBUG_H
/*
* Common DEBUG functionality.
*/
#if defined(__COVERITY__) || defined(__clang_analyzer__)
__attribute__((__noreturn__))
#endif
extern void spl_panic(const char *file, const char *func, int line,
const char *fmt, ...) __attribute__((__noreturn__));
extern void spl_dumpstack(void);
static inline int
spl_assert(const char *buf, const char *file, const char *func, int line)
{
spl_panic(file, func, line, "%s", buf);
return (0);
}
#ifndef expect
#define expect(expr, value) (__builtin_expect((expr), (value)))
#endif
#define likely(expr) expect((expr) != 0, 1)
#define unlikely(expr) expect((expr) != 0, 0)
#define PANIC(fmt, a...) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, fmt, ## a)
#define VERIFY(cond) \
(void) (unlikely(!(cond)) && \
spl_assert("VERIFY(" #cond ") failed\n", \
__FILE__, __FUNCTION__, __LINE__))
#define VERIFY3B(LEFT, OP, RIGHT) do { \
const boolean_t _verify3_left = (boolean_t)(LEFT); \
const boolean_t _verify3_right = (boolean_t)(RIGHT); \
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%d " #OP " %d)\n", \
(boolean_t)_verify3_left, \
(boolean_t)_verify3_right); \
} while (0)
#define VERIFY3S(LEFT, OP, RIGHT) do { \
const int64_t _verify3_left = (int64_t)(LEFT); \
const int64_t _verify3_right = (int64_t)(RIGHT); \
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%lld " #OP " %lld)\n", \
(long long)_verify3_left, \
(long long)_verify3_right); \
} while (0)
#define VERIFY3U(LEFT, OP, RIGHT) do { \
const uint64_t _verify3_left = (uint64_t)(LEFT); \
const uint64_t _verify3_right = (uint64_t)(RIGHT); \
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%llu " #OP " %llu)\n", \
(unsigned long long)_verify3_left, \
(unsigned long long)_verify3_right); \
} while (0)
#define VERIFY3P(LEFT, OP, RIGHT) do { \
const uintptr_t _verify3_left = (uintptr_t)(LEFT); \
const uintptr_t _verify3_right = (uintptr_t)(RIGHT); \
if (unlikely(!(_verify3_left OP _verify3_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%p " #OP " %p)\n", \
(void *)_verify3_left, \
(void *)_verify3_right); \
} while (0)
#define VERIFY0(RIGHT) do { \
const int64_t _verify0_right = (int64_t)(RIGHT); \
if (unlikely(!(0 == _verify0_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY0(" #RIGHT ") " \
"failed (0 == %lld)\n", \
(long long)_verify0_right); \
} while (0)
#define VERIFY0P(RIGHT) do { \
const uintptr_t _verify0_right = (uintptr_t)(RIGHT); \
if (unlikely(!(0 == _verify0_right))) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY0P(" #RIGHT ") " \
"failed (NULL == %p)\n", \
(void *)_verify0_right); \
} while (0)
/*
* Debugging disabled (--disable-debug)
*/
#ifdef NDEBUG
#define ASSERT(x) ((void) sizeof ((uintptr_t)(x)))
#define ASSERT3B(x, y, z) \
((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z)))
#define ASSERT3S(x, y, z) \
((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z)))
#define ASSERT3U(x, y, z) \
((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z)))
#define ASSERT3P(x, y, z) \
((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z)))
#define ASSERT0(x) ((void) sizeof ((uintptr_t)(x)))
#define ASSERT0P(x) ((void) sizeof ((uintptr_t)(x)))
#define IMPLY(A, B) \
((void) sizeof ((uintptr_t)(A)), (void) sizeof ((uintptr_t)(B)))
#define EQUIV(A, B) \
((void) sizeof ((uintptr_t)(A)), (void) sizeof ((uintptr_t)(B)))
/*
* Debugging enabled (--enable-debug)
*/
#else
#define ASSERT3B VERIFY3B
#define ASSERT3S VERIFY3S
#define ASSERT3U VERIFY3U
#define ASSERT3P VERIFY3P
#define ASSERT0 VERIFY0
#define ASSERT0P VERIFY0P
#define ASSERT VERIFY
#define IMPLY(A, B) \
((void)(likely((!(A)) || (B)) || \
spl_assert("(" #A ") implies (" #B ")", \
__FILE__, __FUNCTION__, __LINE__)))
#define EQUIV(A, B) \
((void)(likely(!!(A) == !!(B)) || \
spl_assert("(" #A ") is equivalent to (" #B ")", \
__FILE__, __FUNCTION__, __LINE__)))
#endif /* NDEBUG */
#endif /* SPL_DEBUG_H */
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