1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2014 Garrett D'Amore <garrett@damore.org> 23 * 24 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 /* 29 * Copyright (c) 2012 by Delphix. All rights reserved. 30 * Copyright 2013 Saso Kiselkov. All rights reserved. 31 */ 32 33 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 34 /* All Rights Reserved */ 35 36 #ifndef _SYS_DEBUG_H 37 #define _SYS_DEBUG_H 38 39 #include <sys/isa_defs.h> 40 #include <sys/types.h> 41 #include <sys/note.h> 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 /* 48 * ASSERT(ex) causes a panic or debugger entry if expression ex is not 49 * true. ASSERT() is included only for debugging, and is a no-op in 50 * production kernels. VERIFY(ex), on the other hand, behaves like 51 * ASSERT and is evaluated on both debug and non-debug kernels. 52 */ 53 54 extern int assfail(const char *, const char *, int); 55 #define VERIFY(EX) ((void)((EX) || assfail(#EX, __FILE__, __LINE__))) 56 #if DEBUG 57 #define ASSERT(EX) ((void)((EX) || assfail(#EX, __FILE__, __LINE__))) 58 #else 59 #define ASSERT(x) ((void)0) 60 #endif 61 62 /* 63 * Assertion variants sensitive to the compilation data model 64 */ 65 #if defined(_LP64) 66 #define ASSERT64(x) ASSERT(x) 67 #define ASSERT32(x) 68 #else 69 #define ASSERT64(x) 70 #define ASSERT32(x) ASSERT(x) 71 #endif 72 73 /* 74 * IMPLY and EQUIV are assertions of the form: 75 * 76 * if (a) then (b) 77 * and 78 * if (a) then (b) *AND* if (b) then (a) 79 */ 80 #if DEBUG 81 #define IMPLY(A, B) \ 82 ((void)(((!(A)) || (B)) || \ 83 assfail("(" #A ") implies (" #B ")", __FILE__, __LINE__))) 84 #define EQUIV(A, B) \ 85 ((void)((!!(A) == !!(B)) || \ 86 assfail("(" #A ") is equivalent to (" #B ")", __FILE__, __LINE__))) 87 #else 88 #define IMPLY(A, B) ((void)0) 89 #define EQUIV(A, B) ((void)0) 90 #endif 91 92 /* 93 * ASSERT3() behaves like ASSERT() except that it is an explicit conditional, 94 * and prints out the values of the left and right hand expressions as part of 95 * the panic message to ease debugging. The three variants imply the type 96 * of their arguments. ASSERT3S() is for signed data types, ASSERT3U() is 97 * for unsigned, and ASSERT3P() is for pointers. The VERIFY3*() macros 98 * have the same relationship as above. 99 */ 100 extern void assfail3(const char *, uintmax_t, const char *, uintmax_t, 101 const char *, int); 102 #define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \ 103 const TYPE __left = (TYPE)(LEFT); \ 104 const TYPE __right = (TYPE)(RIGHT); \ 105 if (!(__left OP __right)) \ 106 assfail3(#LEFT " " #OP " " #RIGHT, \ 107 (uintmax_t)__left, #OP, (uintmax_t)__right, \ 108 __FILE__, __LINE__); \ 109 _NOTE(CONSTCOND) } while (0) 110 111 #define VERIFY3S(x, y, z) VERIFY3_IMPL(x, y, z, int64_t) 112 #define VERIFY3U(x, y, z) VERIFY3_IMPL(x, y, z, uint64_t) 113 #define VERIFY3P(x, y, z) VERIFY3_IMPL(x, y, z, uintptr_t) 114 #define VERIFY0(x) VERIFY3_IMPL(x, ==, 0, uintmax_t) 115 116 #if DEBUG 117 #define ASSERT3S(x, y, z) VERIFY3_IMPL(x, y, z, int64_t) 118 #define ASSERT3U(x, y, z) VERIFY3_IMPL(x, y, z, uint64_t) 119 #define ASSERT3P(x, y, z) VERIFY3_IMPL(x, y, z, uintptr_t) 120 #define ASSERT0(x) VERIFY3_IMPL(x, ==, 0, uintmax_t) 121 #else 122 #define ASSERT3S(x, y, z) ((void)0) 123 #define ASSERT3U(x, y, z) ((void)0) 124 #define ASSERT3P(x, y, z) ((void)0) 125 #define ASSERT0(x) ((void)0) 126 #endif 127 128 /* 129 * Compile-time assertion. The condition 'x' must be constant. 130 */ 131 #define CTASSERT(x) _CTASSERT(x, __LINE__) 132 #define _CTASSERT(x, y) __CTASSERT(x, y) 133 #define __CTASSERT(x, y) \ 134 typedef char __compile_time_assertion__ ## y [(x) ? 1 : -1] 135 136 #ifdef _KERNEL 137 138 extern void abort_sequence_enter(char *); 139 extern void debug_enter(char *); 140 141 #endif /* _KERNEL */ 142 143 #if defined(DEBUG) && !defined(__sun) 144 /* CSTYLED */ 145 #define STATIC 146 #else 147 /* CSTYLED */ 148 #define STATIC static 149 #endif 150 151 #ifdef __cplusplus 152 } 153 #endif 154 155 #endif /* _SYS_DEBUG_H */ 156