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38a04f0a7c
The FreeBSD linux/compiler.h in OpenZFS was copied from a very old version of FreeBSD's linuxkpi's linux/compiler.h. There's no need for this duplication. Use FreeBSD's linuxkpi version instead, and provide zfs_fallthrough to augment it (it's all that's needed). Use #pragma once to avoid naming issues for guard variables. Since this is a complete rewrite, use my copyright here (the original code in FreeBSD still credits everybody). This works back at least to FreeBSD 12.4, which is not out of support, and all newer releases. Remove extra copies of macros that were defined elsewhere, but are now properly defined in LinuxKPI so are redundant. Sponsored-by: Netflix Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Warner Losh <imp@bsdimp.com> Closes #16650
316 lines
11 KiB
C
316 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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#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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