Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/os/freebsd/spl/sys/debug.h
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1 /* 2 * Copyright (c) 2020 iXsystems, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 /* 30 * Available Solaris debug functions. All of the ASSERT() macros will be 31 * compiled out when NDEBUG is defined, this is the default behavior for 32 * the SPL. To enable assertions use the --enable-debug with configure. 33 * The VERIFY() functions are never compiled out and cannot be disabled. 34 * 35 * PANIC() - Panic the node and print message. 36 * ASSERT() - Assert X is true, if not panic. 37 * ASSERT3B() - Assert boolean X OP Y is true, if not panic. 38 * ASSERT3S() - Assert signed X OP Y is true, if not panic. 39 * ASSERT3U() - Assert unsigned X OP Y is true, if not panic. 40 * ASSERT3P() - Assert pointer X OP Y is true, if not panic. 41 * ASSERT0() - Assert value is zero, if not panic. 42 * VERIFY() - Verify X is true, if not panic. 43 * VERIFY3B() - Verify boolean X OP Y is true, if not panic. 44 * VERIFY3S() - Verify signed X OP Y is true, if not panic. 45 * VERIFY3U() - Verify unsigned X OP Y is true, if not panic. 46 * VERIFY3P() - Verify pointer X OP Y is true, if not panic. 47 * VERIFY0() - Verify value is zero, if not panic. 48 */ 49 50 #ifndef _SPL_DEBUG_H 51 #define _SPL_DEBUG_H 52 53 54 /* 55 * Common DEBUG functionality. 56 */ 57 #if defined(__COVERITY__) || defined(__clang_analyzer__) 58 __attribute__((__noreturn__)) 59 #endif 60 extern void spl_panic(const char *file, const char *func, int line, 61 const char *fmt, ...) __attribute__((__noreturn__)); 62 extern void spl_dumpstack(void); 63 64 static inline int 65 spl_assert(const char *buf, const char *file, const char *func, int line) 66 { 67 spl_panic(file, func, line, "%s", buf); 68 return (0); 69 } 70 71 #ifndef expect 72 #define expect(expr, value) (__builtin_expect((expr), (value))) 73 #endif 74 #define likely(expr) expect((expr) != 0, 1) 75 #define unlikely(expr) expect((expr) != 0, 0) 76 77 #define PANIC(fmt, a...) \ 78 spl_panic(__FILE__, __FUNCTION__, __LINE__, fmt, ## a) 79 80 #define VERIFY(cond) \ 81 (void) (unlikely(!(cond)) && \ 82 spl_assert("VERIFY(" #cond ") failed\n", \ 83 __FILE__, __FUNCTION__, __LINE__)) 84 85 #define VERIFY3B(LEFT, OP, RIGHT) do { \ 86 const boolean_t _verify3_left = (boolean_t)(LEFT); \ 87 const boolean_t _verify3_right = (boolean_t)(RIGHT); \ 88 if (unlikely(!(_verify3_left OP _verify3_right))) \ 89 spl_panic(__FILE__, __FUNCTION__, __LINE__, \ 90 "VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \ 91 "failed (%d " #OP " %d)\n", \ 92 (boolean_t)(_verify3_left), \ 93 (boolean_t)(_verify3_right)); \ 94 } while (0) 95 96 #define VERIFY3S(LEFT, OP, RIGHT) do { \ 97 const int64_t _verify3_left = (int64_t)(LEFT); \ 98 const int64_t _verify3_right = (int64_t)(RIGHT); \ 99 if (unlikely(!(_verify3_left OP _verify3_right))) \ 100 spl_panic(__FILE__, __FUNCTION__, __LINE__, \ 101 "VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \ 102 "failed (%lld " #OP " %lld)\n", \ 103 (long long) (_verify3_left), \ 104 (long long) (_verify3_right)); \ 105 } while (0) 106 107 #define VERIFY3U(LEFT, OP, RIGHT) do { \ 108 const uint64_t _verify3_left = (uint64_t)(LEFT); \ 109 const uint64_t _verify3_right = (uint64_t)(RIGHT); \ 110 if (unlikely(!(_verify3_left OP _verify3_right))) \ 111 spl_panic(__FILE__, __FUNCTION__, __LINE__, \ 112 "VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \ 113 "failed (%llu " #OP " %llu)\n", \ 114 (unsigned long long) (_verify3_left), \ 115 (unsigned long long) (_verify3_right)); \ 116 } while (0) 117 118 #define VERIFY3P(LEFT, OP, RIGHT) do { \ 119 const uintptr_t _verify3_left = (uintptr_t)(LEFT); \ 120 const uintptr_t _verify3_right = (uintptr_t)(RIGHT); \ 121 if (unlikely(!(_verify3_left OP _verify3_right))) \ 122 spl_panic(__FILE__, __FUNCTION__, __LINE__, \ 123 "VERIFY3(" #LEFT " " #OP " " #RIGHT ") " \ 124 "failed (%px " #OP " %px)\n", \ 125 (void *) (_verify3_left), \ 126 (void *) (_verify3_right)); \ 127 } while (0) 128 129 #define VERIFY0(RIGHT) do { \ 130 const int64_t _verify3_left = (int64_t)(0); \ 131 const int64_t _verify3_right = (int64_t)(RIGHT); \ 132 if (unlikely(!(_verify3_left == _verify3_right))) \ 133 spl_panic(__FILE__, __FUNCTION__, __LINE__, \ 134 "VERIFY0(0 == " #RIGHT ") " \ 135 "failed (0 == %lld)\n", \ 136 (long long) (_verify3_right)); \ 137 } while (0) 138 139 /* 140 * Debugging disabled (--disable-debug) 141 */ 142 #ifdef NDEBUG 143 144 #define ASSERT(x) ((void) sizeof ((uintptr_t)(x))) 145 #define ASSERT3B(x, y, z) \ 146 ((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z))) 147 #define ASSERT3S(x, y, z) \ 148 ((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z))) 149 #define ASSERT3U(x, y, z) \ 150 ((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z))) 151 #define ASSERT3P(x, y, z) \ 152 ((void) sizeof ((uintptr_t)(x)), (void) sizeof ((uintptr_t)(z))) 153 #define ASSERT0(x) ((void) sizeof ((uintptr_t)(x))) 154 #define IMPLY(A, B) \ 155 ((void) sizeof ((uintptr_t)(A)), (void) sizeof ((uintptr_t)(B))) 156 #define EQUIV(A, B) \ 157 ((void) sizeof ((uintptr_t)(A)), (void) sizeof ((uintptr_t)(B))) 158 159 /* 160 * Debugging enabled (--enable-debug) 161 */ 162 #else 163 164 #define ASSERT3B VERIFY3B 165 #define ASSERT3S VERIFY3S 166 #define ASSERT3U VERIFY3U 167 #define ASSERT3P VERIFY3P 168 #define ASSERT0 VERIFY0 169 #define ASSERT VERIFY 170 #define IMPLY(A, B) \ 171 ((void)(likely((!(A)) || (B)) || \ 172 spl_assert("(" #A ") implies (" #B ")", \ 173 __FILE__, __FUNCTION__, __LINE__))) 174 #define EQUIV(A, B) \ 175 ((void)(likely(!!(A) == !!(B)) || \ 176 spl_assert("(" #A ") is equivalent to (" #B ")", \ 177 __FILE__, __FUNCTION__, __LINE__))) 178 179 180 #endif /* NDEBUG */ 181 182 #endif /* SPL_DEBUG_H */
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