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eeddd80572
The use of __noreturn__ in 55d7afa4ad on
spl_panic() caused objtool warnings on Linux when the kernel is built
with CONFIG_STACK_VALIDATION=y. This patch works around that by
restricting the application of __noreturn__ to builds for static
analyzers.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #14068
186 lines
6.6 KiB
C
186 lines
6.6 KiB
C
/*
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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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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* 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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*/
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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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#define __printflike(a, b) __printf(a, b)
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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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#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 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 _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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"VERIFY3(0 == " #RIGHT ") " \
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"failed (0 == %lld)\n", \
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(long long) (_verify3_right)); \
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} while (0)
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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 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 ASSERT VERIFY
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#define 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 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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#endif /* NDEBUG */
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#endif /* SPL_DEBUG_H */
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