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e5e2a5a3b8
Being able to print custom debug information on assert trip seems useful. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Paul Dagnelie <pcd@delphix.com> Signed-off-by: Rich Ercolani <rincebrain@gmail.com> Closes #15792
320 lines
11 KiB
C
320 lines
11 KiB
C
/*
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* Copyright (c) 2020 iXsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Available Solaris debug functions. All of the ASSERT() macros will be
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* compiled out when NDEBUG is defined, this is the default behavior for
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* the SPL. To enable assertions use the --enable-debug with configure.
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* The VERIFY() functions are never compiled out and cannot be disabled.
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*
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* PANIC() - Panic the node and print message.
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* ASSERT() - Assert X is true, if not panic.
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* ASSERT3B() - Assert boolean X OP Y is true, if not panic.
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* ASSERT3S() - Assert signed X OP Y is true, if not panic.
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* ASSERT3U() - Assert unsigned X OP Y is true, if not panic.
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* ASSERT3P() - Assert pointer X OP Y is true, if not panic.
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* ASSERT0() - Assert value is zero, if not panic.
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* ASSERT0P() - Assert pointer is null, if not panic.
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* VERIFY() - Verify X is true, if not panic.
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* VERIFY3B() - Verify boolean X OP Y is true, if not panic.
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* VERIFY3S() - Verify signed X OP Y is true, if not panic.
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* VERIFY3U() - Verify unsigned X OP Y is true, if not panic.
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* VERIFY3P() - Verify pointer X OP Y is true, if not panic.
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* VERIFY0() - Verify value is zero, if not panic.
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* VERIFY0P() - Verify pointer is null, if not panic.
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*/
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#ifndef _SPL_DEBUG_H
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#define _SPL_DEBUG_H
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/*
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* Common DEBUG functionality.
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*/
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#ifdef __FreeBSD__
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#include <linux/compiler.h>
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#endif
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#ifndef __printflike
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#define __printflike(a, b) __printf(a, b)
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#endif
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#ifndef __maybe_unused
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#define __maybe_unused __attribute__((unused))
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#endif
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/*
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* Without this, we see warnings from objtool during normal Linux builds when
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* the kernel is built with CONFIG_STACK_VALIDATION=y:
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*
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* warning: objtool: tsd_create() falls through to next function __list_add()
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* warning: objtool: .text: unexpected end of section
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*
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* Until the toolchain stops doing this, we must only define this attribute on
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* spl_panic() when doing static analysis.
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*/
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#if defined(__COVERITY__) || defined(__clang_analyzer__)
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__attribute__((__noreturn__))
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#endif
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extern void spl_panic(const char *file, const char *func, int line,
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const char *fmt, ...);
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extern void spl_dumpstack(void);
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static inline int
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spl_assert(const char *buf, const char *file, const char *func, int line)
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{
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spl_panic(file, func, line, "%s", buf);
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return (0);
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}
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#ifndef expect
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#define expect(expr, value) (__builtin_expect((expr), (value)))
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#endif
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#ifndef __linux__
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#define likely(expr) expect((expr) != 0, 1)
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#define unlikely(expr) expect((expr) != 0, 0)
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#endif
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#define PANIC(fmt, a...) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, fmt, ## a)
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#define VERIFY(cond) \
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(void) (unlikely(!(cond)) && \
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spl_assert("VERIFY(" #cond ") failed\n", \
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__FILE__, __FUNCTION__, __LINE__))
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#define VERIFYF(cond, str, ...) do { \
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if (unlikely(!cond)) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY(" #cond ") failed " str "\n", __VA_ARGS__);\
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} while (0)
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#define VERIFY3B(LEFT, OP, RIGHT) do { \
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const boolean_t _verify3_left = (boolean_t)(LEFT); \
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const boolean_t _verify3_right = (boolean_t)(RIGHT); \
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if (unlikely(!(_verify3_left OP _verify3_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
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"failed (%d " #OP " %d)\n", \
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(boolean_t)_verify3_left, \
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(boolean_t)_verify3_right); \
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} while (0)
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#define VERIFY3S(LEFT, OP, RIGHT) do { \
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const int64_t _verify3_left = (int64_t)(LEFT); \
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const int64_t _verify3_right = (int64_t)(RIGHT); \
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if (unlikely(!(_verify3_left OP _verify3_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
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"failed (%lld " #OP " %lld)\n", \
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(long long)_verify3_left, \
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(long long)_verify3_right); \
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} while (0)
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#define VERIFY3U(LEFT, OP, RIGHT) do { \
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const uint64_t _verify3_left = (uint64_t)(LEFT); \
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const uint64_t _verify3_right = (uint64_t)(RIGHT); \
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if (unlikely(!(_verify3_left OP _verify3_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
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"failed (%llu " #OP " %llu)\n", \
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(unsigned long long)_verify3_left, \
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(unsigned long long)_verify3_right); \
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} while (0)
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#define VERIFY3P(LEFT, OP, RIGHT) do { \
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const uintptr_t _verify3_left = (uintptr_t)(LEFT); \
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const uintptr_t _verify3_right = (uintptr_t)(RIGHT); \
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if (unlikely(!(_verify3_left OP _verify3_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
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"failed (%px " #OP " %px)\n", \
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(void *)_verify3_left, \
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(void *)_verify3_right); \
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} while (0)
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#define VERIFY0(RIGHT) do { \
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const int64_t _verify0_right = (int64_t)(RIGHT); \
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if (unlikely(!(0 == _verify0_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY0(" #RIGHT ") " \
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"failed (0 == %lld)\n", \
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(long long)_verify0_right); \
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} while (0)
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#define VERIFY0P(RIGHT) do { \
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const uintptr_t _verify0_right = (uintptr_t)(RIGHT); \
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if (unlikely(!(0 == _verify0_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY0P(" #RIGHT ") " \
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"failed (NULL == %px)\n", \
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(void *)_verify0_right); \
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} while (0)
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/*
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* Note that you should not put any operations you want to always happen
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* in the print section for ASSERTs unless you only want them to run on
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* debug builds!
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* e.g. ASSERT3UF(2, <, 3, "%s", foo(x)), foo(x) won't run on non-debug
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* builds.
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*/
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#define VERIFY3BF(LEFT, OP, RIGHT, STR, ...) do { \
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const boolean_t _verify3_left = (boolean_t)(LEFT); \
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const boolean_t _verify3_right = (boolean_t)(RIGHT); \
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if (unlikely(!(_verify3_left OP _verify3_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
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"failed (%d " #OP " %d) " STR "\n", \
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(boolean_t)(_verify3_left), \
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(boolean_t)(_verify3_right), \
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__VA_ARGS__); \
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} while (0)
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#define VERIFY3SF(LEFT, OP, RIGHT, STR, ...) do { \
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const int64_t _verify3_left = (int64_t)(LEFT); \
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const int64_t _verify3_right = (int64_t)(RIGHT); \
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if (unlikely(!(_verify3_left OP _verify3_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
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"failed (%lld " #OP " %lld) " STR "\n", \
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(long long)(_verify3_left), \
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(long long)(_verify3_right), \
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__VA_ARGS); \
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} while (0)
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#define VERIFY3UF(LEFT, OP, RIGHT, STR, ...) do { \
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const uint64_t _verify3_left = (uint64_t)(LEFT); \
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const uint64_t _verify3_right = (uint64_t)(RIGHT); \
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if (unlikely(!(_verify3_left OP _verify3_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
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"failed (%llu " #OP " %llu) " STR "\n", \
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(unsigned long long)(_verify3_left), \
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(unsigned long long)(_verify3_right), \
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__VA_ARGS); \
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} while (0)
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#define VERIFY3PF(LEFT, OP, RIGHT, STR, ...) do { \
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const uintptr_t _verify3_left = (uintptr_t)(LEFT); \
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const uintptr_t _verify3_right = (uintptr_t)(RIGHT); \
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if (unlikely(!(_verify3_left OP _verify3_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \
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"failed (%px " #OP " %px) " STR "\n", \
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(void *) (_verify3_left), \
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(void *) (_verify3_right), \
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__VA_ARGS__); \
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} while (0)
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#define VERIFY0PF(RIGHT, STR, ...) do { \
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const uintptr_t _verify3_left = (uintptr_t)(0); \
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const uintptr_t _verify3_right = (uintptr_t)(RIGHT); \
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if (unlikely(!(_verify3_left == _verify3_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY0(0 == " #RIGHT ") " \
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"failed (0 == %px) " STR "\n", \
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(long long) (_verify3_right), \
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__VA_ARGS__); \
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} while (0)
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#define VERIFY0F(RIGHT, STR, ...) do { \
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const int64_t _verify3_left = (int64_t)(0); \
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const int64_t _verify3_right = (int64_t)(RIGHT); \
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if (unlikely(!(_verify3_left == _verify3_right))) \
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spl_panic(__FILE__, __FUNCTION__, __LINE__, \
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"VERIFY0(0 == " #RIGHT ") " \
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"failed (0 == %lld) " STR "\n", \
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(long long) (_verify3_right), \
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__VA_ARGS__); \
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} while (0)
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#define VERIFY_IMPLY(A, B) \
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((void)(likely((!(A)) || (B)) || \
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spl_assert("(" #A ") implies (" #B ")", \
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__FILE__, __FUNCTION__, __LINE__)))
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#define VERIFY_EQUIV(A, B) \
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((void)(likely(!!(A) == !!(B)) || \
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spl_assert("(" #A ") is equivalent to (" #B ")", \
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__FILE__, __FUNCTION__, __LINE__)))
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/*
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* Debugging disabled (--disable-debug)
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*/
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#ifdef NDEBUG
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#define ASSERT(x) ((void) sizeof ((uintptr_t)(x)))
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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 ASSERT0P(x) ((void) sizeof ((uintptr_t)(x)))
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#define ASSERT3BF(x, y, z, str, ...) ASSERT3B(x, y, z)
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#define ASSERT3SF(x, y, z, str, ...) ASSERT3S(x, y, z)
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#define ASSERT3UF(x, y, z, str, ...) ASSERT3U(x, y, z)
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#define ASSERT3PF(x, y, z, str, ...) ASSERT3P(x, y, z)
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#define ASSERT0PF(x, str, ...) ASSERT0P(x)
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#define ASSERT0F(x, str, ...) ASSERT0(x)
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#define ASSERTF(x, str, ...) ASSERT(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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/*
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* Debugging enabled (--enable-debug)
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*/
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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 ASSERT0P VERIFY0P
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#define ASSERT3BF VERIFY3BF
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#define ASSERT3SF VERIFY3SF
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#define ASSERT3UF VERIFY3UF
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#define ASSERT3PF VERIFY3PF
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#define ASSERT0PF VERIFY0PF
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#define ASSERT0F VERIFY0F
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#define ASSERTF VERIFYF
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#define ASSERT VERIFY
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#define IMPLY VERIFY_IMPLY
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#define EQUIV VERIFY_EQUIV
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#endif /* NDEBUG */
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#endif /* SPL_DEBUG_H */
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