lint2.h revision 1.21
1/* $NetBSD: lint2.h,v 1.21 2021/12/22 14:49:11 rillig Exp $ */ 2 3/* 4 * Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved. 5 * Copyright (c) 1994, 1995 Jochen Pohl 6 * All Rights Reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Jochen Pohl for 19 * The NetBSD Project. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35#include "lint.h" 36 37/* 38 * Types are described by structures of type type_t. 39 */ 40struct lint2_type { 41 tspec_t t_tspec; /* type specifier */ 42 bool t_const:1; /* constant */ 43 bool t_volatile:1; /* volatile */ 44 bool t_vararg:1; /* function has variable number of arguments */ 45 bool t_is_enum:1; 46 bool t_proto:1; /* this is a prototype */ 47 bool t_istag:1; /* tag with _t_tag valid */ 48 bool t_istynam:1; /* tag with _t_tynam valid */ 49 bool t_isuniqpos:1; /* tag with _t_uniqpos valid */ 50 union { 51 int _t_dim; /* if the type is an ARRAY than this 52 is the dimension of the array. */ 53 struct hte *_t_tag; /* hash table entry of tag if 54 t_is_enum, STRUCT or UNION */ 55 struct hte *_t_tynam; /* hash table entry of typename if 56 t_is_enum, STRUCT or UNION */ 57 struct { 58 int p_line; 59 short p_file; 60 int p_uniq; 61 } _t_uniqpos; /* unique position, for untagged 62 untyped STRUCTs, UNIONS, and ENUMs, 63 if t_isuniqpos */ 64 struct lint2_type **_t_args; /* list of argument types if 65 this is a prototype */ 66 } t_u; 67 struct lint2_type *t_subt; /* element type (if ARRAY), 68 return type (if FUNC), 69 target type (if PTR) */ 70}; 71 72#define t_dim t_u._t_dim 73#define t_tag t_u._t_tag 74#define t_tynam t_u._t_tynam 75#define t_uniqpos t_u._t_uniqpos 76#define t_args t_u._t_args 77 78/* 79 * argument information 80 * 81 * Such a structure is created for each argument of a function call 82 * which is an integer constant or a constant string. 83 */ 84typedef struct arginf { 85 int a_num; /* # of argument (1..) */ 86 bool a_zero:1; /* argument is 0 */ 87 bool a_pcon:1; /* msb of argument is not set */ 88 bool a_ncon:1; /* msb of argument is set */ 89 bool a_fmt:1; /* a_fstrg points to format string */ 90 char *a_fstrg; /* format string */ 91 struct arginf *a_next; /* information for next const. argument */ 92} arginf_t; 93 94/* 95 * Keeps information about position in source file. 96 */ 97typedef struct { 98 unsigned short p_src; /* index of name of translation unit 99 (the name which was specified at the 100 command line) */ 101 unsigned short p_line; /* line number in p_src */ 102 unsigned short p_isrc; /* index of (included) file */ 103 unsigned short p_iline; /* line number in p_iline */ 104} pos_t; 105 106/* Used for definitions and declarations. */ 107typedef struct sym { 108 struct { 109 pos_t s_pos; /* pos of def./decl. */ 110#if !defined(lint) && !defined(DEBUG) 111 unsigned char s_def; /* DECL, TDEF or DEF */ 112#else 113 def_t s_def; 114#endif 115 bool s_function_has_return_value:1; 116 bool s_inline:1; 117 bool s_old_style_function:1; 118 bool s_static:1; 119 bool s_check_only_first_args:1; 120 bool s_printflike:1; 121 bool s_scanflike:1; 122 unsigned short s_type; 123 /* XXX: gap of 4 bytes on LP64 platforms */ 124 struct sym *s_next; /* next symbol with same name */ 125 } s_s; 126 /* 127 * To save memory, the remaining members are only allocated if one of 128 * s_check_only_first_args, s_printflike and s_scanflike is set. 129 */ 130 short s_check_num_args; /* if s_check_only_first_args */ 131 short s_printflike_arg; /* if s_printflike */ 132 short s_scanflike_arg; /* if s_scanflike */ 133} sym_t; 134 135#define s_pos s_s.s_pos 136#define s_function_has_return_value s_s.s_function_has_return_value 137#define s_old_style_function s_s.s_old_style_function 138#define s_inline s_s.s_inline 139#define s_static s_s.s_static 140#define s_def s_s.s_def 141#define s_check_only_first_args s_s.s_check_only_first_args 142#define s_printflike s_s.s_printflike 143#define s_scanflike s_s.s_scanflike 144#define s_type s_s.s_type 145#define s_next s_s.s_next 146 147/* 148 * Used to store information about function calls. 149 */ 150typedef struct fcall { 151 pos_t f_pos; /* position of call */ 152 bool f_rused:1; /* return value used */ 153 bool f_rdisc:1; /* return value discarded (casted to void) */ 154 unsigned short f_type; /* types of expected return value and args */ 155 arginf_t *f_args; /* information about constant arguments */ 156 struct fcall *f_next; /* next call of same function */ 157} fcall_t; 158 159/* 160 * Used to store information about usage of symbols other 161 * than for function calls. 162 */ 163typedef struct usym { 164 pos_t u_pos; /* position */ 165 struct usym *u_next; /* next usage */ 166} usym_t; 167 168/* 169 * hash table entry 170 */ 171typedef struct hte { 172 const char *h_name; /* name */ 173 bool h_used:1; /* symbol is used */ 174 bool h_def:1; /* symbol is defined */ 175 bool h_static:1; /* static symbol */ 176 sym_t *h_syms; /* declarations and definitions */ 177 sym_t **h_lsym; /* points to s_next of last decl./def. */ 178 fcall_t *h_calls; /* function calls */ 179 fcall_t **h_lcall; /* points to f_next of last call */ 180 usym_t *h_usyms; /* usage info */ 181 usym_t **h_lusym; /* points to u_next of last usage info */ 182 struct hte *h_link; /* next hte with same hash function */ 183 struct hte *h_hte; /* pointer to other htes (for renames) */ 184} hte_t; 185 186#include "externs2.h" 187 188/* maps type indices into pointers to type structs */ 189INLINE_FUNC type_t * 190TP(unsigned short type_id) { 191 /* force sequence point for newly parsed type_id */ 192 return tlst[type_id]; 193} 194