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/*
* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
* Copyright (C) 2007 The Regents of the University of California.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
* UCRL-CODE-235197
*
* This file is part of the SPL, Solaris Porting Layer.
* For details, see <http://zfsonlinux.org/>.
*
* The SPL is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* The SPL is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* 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.
* ASSERTV() - Wraps a variable declaration which is only used by ASSERT().
* 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.
* 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.
*/
#ifndef _SPL_DEBUG_H
#define _SPL_DEBUG_H
/*
* Common DEBUG functionality.
*/
int spl_panic(const char *file, const char *func, int line,
const char *fmt, ...);
void spl_dumpstack(void);
/* BEGIN CSTYLED */
#define PANIC(fmt, a...) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, fmt, ## a)
#define VERIFY(cond) \
(void) (unlikely(!(cond)) && \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"%s", "VERIFY(" #cond ") failed\n"))
#define VERIFY3B(LEFT, OP, RIGHT) do { \
boolean_t _verify3_left = (boolean_t)(LEFT); \
boolean_t _verify3_right = (boolean_t)(RIGHT); \
if (!(_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 { \
int64_t _verify3_left = (int64_t)(LEFT); \
int64_t _verify3_right = (int64_t)(RIGHT); \
if (!(_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 { \
uint64_t _verify3_left = (uint64_t)(LEFT); \
uint64_t _verify3_right = (uint64_t)(RIGHT); \
if (!(_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 { \
uintptr_t _verify3_left = (uintptr_t)(LEFT); \
uintptr_t _verify3_right = (uintptr_t)(RIGHT); \
if (!(_verify3_left OP _verify3_right)) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
"failed (%px" #OP " %px)\n", \
(void *) (_verify3_left), \
(void *) (_verify3_right)); \
} while (0)
#define VERIFY0(RIGHT) do { \
int64_t _verify3_left = (int64_t)(0); \
int64_t _verify3_right = (int64_t)(RIGHT); \
if (!(_verify3_left == _verify3_right)) \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(0 == " #RIGHT ") " \
"failed (0 == %lld)\n", \
(long long) (_verify3_right)); \
} while (0)
#define CTASSERT_GLOBAL(x) _CTASSERT(x, __LINE__)
#define CTASSERT(x) { _CTASSERT(x, __LINE__); }
#define _CTASSERT(x, y) __CTASSERT(x, y)
#define __CTASSERT(x, y) \
typedef char __attribute__ ((unused)) \
__compile_time_assertion__ ## y[(x) ? 1 : -1]
/*
* Debugging disabled (--disable-debug)
*/
#ifdef NDEBUG
#define ASSERT(x) ((void)0)
#define ASSERTV(x)
#define ASSERT3B(x,y,z) ((void)0)
#define ASSERT3S(x,y,z) ((void)0)
#define ASSERT3U(x,y,z) ((void)0)
#define ASSERT3P(x,y,z) ((void)0)
#define ASSERT0(x) ((void)0)
#define IMPLY(A, B) ((void)0)
#define EQUIV(A, B) ((void)0)
/*
* Debugging enabled (--enable-debug)
*/
#else
#define ASSERT3B VERIFY3B
#define ASSERT3S VERIFY3S
#define ASSERT3U VERIFY3U
#define ASSERT3P VERIFY3P
#define ASSERT0 VERIFY0
#define ASSERT VERIFY
#define ASSERTV(x) x
#define IMPLY(A, B) \
((void)(((!(A)) || (B)) || \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"(" #A ") implies (" #B ")")))
#define EQUIV(A, B) \
((void)((!!(A) == !!(B)) || \
spl_panic(__FILE__, __FUNCTION__, __LINE__, \
"(" #A ") is equivalent to (" #B ")")))
/* END CSTYLED */
#endif /* NDEBUG */
#endif /* SPL_DEBUG_H */
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