1 /* $NetBSD: lint1.h,v 1.13 2002/02/05 03:04:29 thorpej 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 #include "op.h" 37 38 /* XXX - works for most systems, but the whole ALIGN thing needs to go away */ 39 #ifndef ALIGN 40 #define ALIGN(x) (((x) + 7) & ~7) 41 #endif 42 43 /* 44 * Describes the position of a declaration or anything else. 45 */ 46 typedef struct { 47 int p_line; 48 const char *p_file; 49 int p_uniq; /* uniquifier */ 50 } pos_t; 51 52 /* Copies curr_pos, keeping things unique. */ 53 #define UNIQUE_CURR_POS(pos) \ 54 do { \ 55 STRUCT_ASSIGN((pos), curr_pos); \ 56 curr_pos.p_uniq++; \ 57 if (curr_pos.p_file == csrc_pos.p_file) \ 58 csrc_pos.p_uniq++; \ 59 } while (0) 60 61 /* 62 * Strings cannot be referenced to simply by a pointer to its first 63 * char. This is because strings can contain NUL characters other than the 64 * trailing NUL. 65 * 66 * Strings are stored with a trailing NUL. 67 */ 68 typedef struct strg { 69 tspec_t st_tspec; /* CHAR or WCHAR */ 70 size_t st_len; /* length without trailing NUL */ 71 union { 72 u_char *_st_cp; 73 wchar_t *_st_wcp; 74 } st_u; 75 } strg_t; 76 77 #define st_cp st_u._st_cp 78 #define st_wcp st_u._st_wcp 79 80 /* 81 * qualifiers (only for lex/yacc interface) 82 */ 83 typedef enum { 84 CONST, VOLATILE 85 } tqual_t; 86 87 /* 88 * Integer and floating point values are stored in this structure 89 */ 90 typedef struct { 91 tspec_t v_tspec; 92 int v_ansiu; /* set if an integer constant is 93 unsigned in ANSI C */ 94 union { 95 int64_t _v_quad; /* integers */ 96 ldbl_t _v_ldbl; /* floats */ 97 } v_u; 98 } val_t; 99 100 #define v_quad v_u._v_quad 101 #define v_ldbl v_u._v_ldbl 102 103 /* 104 * Structures of type str_t uniqely identify structures. This can't 105 * be done in structures of type type_t, because these are copied 106 * if they must be modified. So it would not be possible to check 107 * if to structures are identical by comparing the pointers to 108 * the type structures. 109 * 110 * The typename is used if the structure is unnamed to identify 111 * the structure type in pass 2. 112 */ 113 typedef struct { 114 u_int size; /* size in bit */ 115 u_int align : 15; /* alignment in bit */ 116 u_int sincompl : 1; /* set if incomplete type */ 117 struct sym *memb; /* list of members */ 118 struct sym *stag; /* symbol table entry of tag */ 119 struct sym *stdef; /* symbol table entry of first typename */ 120 } str_t; 121 122 /* 123 * same as above for enums 124 */ 125 typedef struct { 126 u_int eincompl : 1; /* incomplete enum type */ 127 struct sym *elem; /* list of enumerators */ 128 struct sym *etag; /* symbol table entry of tag */ 129 struct sym *etdef; /* symbol table entry of first typename */ 130 } enum_t; 131 132 /* 133 * Types are represented by concatenation of structures of type type_t 134 * via t_subt. 135 */ 136 typedef struct type { 137 tspec_t t_tspec; /* type specifier */ 138 u_int t_aincompl : 1; /* incomplete array type */ 139 u_int t_const : 1; /* const modifier */ 140 u_int t_volatile : 1; /* volatile modifier */ 141 u_int t_proto : 1; /* function prototype (t_args valid) */ 142 u_int t_vararg : 1; /* protoype with ... */ 143 u_int t_typedef : 1; /* type defined with typedef */ 144 u_int t_isfield : 1; /* type is bitfield */ 145 u_int t_isenum : 1; /* type is (or was) enum (t_enum valid) */ 146 union { 147 int _t_dim; /* dimension */ 148 str_t *_t_str; /* struct/union tag */ 149 enum_t *_t_enum; /* enum tag */ 150 struct sym *_t_args; /* arguments (if t_proto) */ 151 } t_u; 152 struct { 153 u_int _t_flen : 8; /* length of bit-field */ 154 u_int _t_foffs : 24; /* offset of bit-field */ 155 } t_b; 156 struct type *t_subt; /* element type (arrays), return value 157 (functions), or type pointer points to */ 158 } type_t; 159 160 #define t_dim t_u._t_dim 161 #define t_str t_u._t_str 162 #define t_field t_u._t_field 163 #define t_enum t_u._t_enum 164 #define t_args t_u._t_args 165 #define t_flen t_b._t_flen 166 #define t_foffs t_b._t_foffs 167 168 /* 169 * types of symbols 170 */ 171 typedef enum { 172 FVFT, /* variables, functions, type names, enums */ 173 FMOS, /* members of structs or unions */ 174 FTAG, /* tags */ 175 FLAB /* labels */ 176 } symt_t; 177 178 /* 179 * storage classes 180 */ 181 typedef enum { 182 NOSCL, 183 EXTERN, /* external symbols (indep. of decl_t) */ 184 STATIC, /* static symbols (local and global) */ 185 AUTO, /* automatic symbols (except register) */ 186 REG, /* register */ 187 TYPEDEF, /* typedef */ 188 STRTAG, 189 UNIONTAG, 190 ENUMTAG, 191 MOS, /* member of struct */ 192 MOU, /* member of union */ 193 ENUMCON, /* enumerator */ 194 ABSTRACT, /* abstract symbol (sizeof, casts, unnamed argument) */ 195 ARG, /* argument */ 196 PARG, /* used in declaration stack during prototype 197 declaration */ 198 INLINE /* only used by the parser */ 199 } scl_t; 200 201 /* 202 * symbol table entry 203 */ 204 typedef struct sym { 205 const char *s_name; /* name */ 206 const char *s_rename; /* renamed symbol's given name */ 207 pos_t s_dpos; /* position of last (prototype)definition, 208 prototypedeclaration, no-prototype-def., 209 tentative definition or declaration, 210 in this order */ 211 pos_t s_spos; /* position of first initialisation */ 212 pos_t s_upos; /* position of first use */ 213 symt_t s_kind; /* type of symbol */ 214 u_int s_keyw : 1; /* keyword */ 215 u_int s_field : 1; /* bit-field */ 216 u_int s_set : 1; /* variable set, label defined */ 217 u_int s_used : 1; /* variable/label used */ 218 u_int s_arg : 1; /* symbol is function argument */ 219 u_int s_reg : 1; /* symbol is register variable */ 220 u_int s_defarg : 1; /* undefined symbol in old style function 221 definition */ 222 u_int s_rimpl : 1; /* return value of function implizit decl. */ 223 u_int s_osdef : 1; /* symbol stems from old style function def. */ 224 u_int s_inline : 1; /* true if this is a inline function */ 225 struct sym *s_xsym; /* for local declared external symbols pointer 226 to external symbol with same name */ 227 def_t s_def; /* declared, tentative defined, defined */ 228 scl_t s_scl; /* storage class */ 229 int s_blklev; /* level of declaration, -1 if not in symbol 230 table */ 231 type_t *s_type; /* type */ 232 val_t s_value; /* value (if enumcon) */ 233 union { 234 str_t *_s_st; /* tag, if it is a struct/union member */ 235 enum_t *_s_et; /* tag, if it is a enumerator */ 236 tspec_t _s_tsp; /* type (only for keywords) */ 237 tqual_t _s_tqu; /* qualifier (only for keywords) */ 238 struct sym *_s_args; /* arguments in old style function 239 definitions */ 240 } u; 241 struct sym *s_link; /* next symbol with same hash value */ 242 struct sym **s_rlink; /* pointer to s_link of prev. symbol */ 243 struct sym *s_nxt; /* next struct/union member, enumerator, 244 argument */ 245 struct sym *s_dlnxt; /* next symbol declared on same level */ 246 } sym_t; 247 248 #define s_styp u._s_st 249 #define s_etyp u._s_et 250 #define s_tspec u._s_tsp 251 #define s_tqual u._s_tqu 252 #define s_args u._s_args 253 254 /* 255 * Used to keep some informations about symbols before they are entered 256 * into the symbol table. 257 */ 258 typedef struct sbuf { 259 const char *sb_name; /* name of symbol */ 260 size_t sb_len; /* length (without '\0') */ 261 int sb_hash; /* hash value */ 262 sym_t *sb_sym; /* symbol table entry */ 263 struct sbuf *sb_nxt; /* for freelist */ 264 } sbuf_t; 265 266 267 /* 268 * tree node 269 */ 270 typedef struct tnode { 271 op_t tn_op; /* operator */ 272 type_t *tn_type; /* type */ 273 u_int tn_lvalue : 1; /* node is lvalue */ 274 u_int tn_cast : 1; /* if tn_op == CVT its an explizit cast */ 275 u_int tn_parn : 1; /* node parenthesized */ 276 union { 277 struct { 278 struct tnode *_tn_left; /* (left) operand */ 279 struct tnode *_tn_right; /* right operand */ 280 } tn_s; 281 sym_t *_tn_sym; /* symbol if op == NAME */ 282 val_t *_tn_val; /* value if op == CON */ 283 strg_t *_tn_strg; /* string if op == STRING */ 284 } tn_u; 285 } tnode_t; 286 287 #define tn_left tn_u.tn_s._tn_left 288 #define tn_right tn_u.tn_s._tn_right 289 #define tn_sym tn_u._tn_sym 290 #define tn_val tn_u._tn_val 291 #define tn_strg tn_u._tn_strg 292 293 /* 294 * For nested declarations a stack exists, which holds all information 295 * needed for the current level. dcs points to the top element of this 296 * stack. 297 * 298 * ctx describes the context of the current declaration. Its value is 299 * one of 300 * EXTERN global declarations 301 * MOS oder MOU declarations of struct or union members 302 * ENUMCON declarations of enums 303 * ARG declaration of arguments in old style function definitions 304 * PARG declaration of arguments in function prototypes 305 * AUTO declaration of local symbols 306 * ABSTRACT abstract declarations (sizeof, casts) 307 * 308 */ 309 typedef struct dinfo { 310 tspec_t d_atyp; /* VOID, CHAR, INT, FLOAT or DOUBLE */ 311 tspec_t d_smod; /* SIGNED or UNSIGN */ 312 tspec_t d_lmod; /* SHORT, LONG or QUAD */ 313 scl_t d_scl; /* storage class */ 314 type_t *d_type; /* after deftyp() pointer to the type used 315 for all declarators */ 316 sym_t *d_rdcsym; /* redeclared symbol */ 317 int d_offset; /* offset of next structure member */ 318 int d_stralign; /* alignment required for current structure */ 319 scl_t d_ctx; /* context of declaration */ 320 u_int d_const : 1; /* const in declaration specifiers */ 321 u_int d_volatile : 1; /* volatile in declaration specifiers */ 322 u_int d_inline : 1; /* inline in declaration specifiers */ 323 u_int d_mscl : 1; /* multiple storage classes */ 324 u_int d_terr : 1; /* invalid type combination */ 325 u_int d_nedecl : 1; /* 1 if at least a tag is declared */ 326 u_int d_vararg : 1; /* ... in in current function decl. */ 327 u_int d_proto : 1; /* current funct. decl. is prototype */ 328 u_int d_notyp : 1; /* set if no type specifier was present */ 329 u_int d_asm : 1; /* set if d_ctx == AUTO and asm() present */ 330 type_t *d_tagtyp; /* tag during member declaration */ 331 sym_t *d_fargs; /* list of arguments during function def. */ 332 pos_t d_fdpos; /* position of function definition */ 333 sym_t *d_dlsyms; /* first symbol declared at this level */ 334 sym_t **d_ldlsym; /* points to s_dlnxt in last symbol decl. 335 at this level */ 336 sym_t *d_fpsyms; /* symbols defined in prototype */ 337 struct dinfo *d_nxt; /* next level */ 338 } dinfo_t; 339 340 /* 341 * Type of stack which is used for initialisation of aggregate types. 342 */ 343 typedef struct istk { 344 type_t *i_type; /* type of initialisation */ 345 type_t *i_subt; /* type of next level */ 346 u_int i_brace : 1; /* need } for pop */ 347 u_int i_nolimit : 1; /* incomplete array type */ 348 sym_t *i_mem; /* next structure member */ 349 int i_cnt; /* # of remaining elements */ 350 struct istk *i_nxt; /* previous level */ 351 } istk_t; 352 353 /* 354 * Used to collect information about pointers and qualifiers in 355 * declarators. 356 */ 357 typedef struct pqinf { 358 int p_pcnt; /* number of asterisks */ 359 u_int p_const : 1; 360 u_int p_volatile : 1; 361 struct pqinf *p_nxt; 362 } pqinf_t; 363 364 /* 365 * Case values are stored in a list of type clst_t. 366 */ 367 typedef struct clst { 368 val_t cl_val; 369 struct clst *cl_nxt; 370 } clst_t; 371 372 /* 373 * Used to keep informations about nested control statements. 374 */ 375 typedef struct cstk { 376 int c_env; /* type of statement (T_IF, ...) */ 377 u_int c_loop : 1; /* continue && break are valid */ 378 u_int c_switch : 1; /* case && break are valid */ 379 u_int c_break : 1; /* loop/switch has break */ 380 u_int c_cont : 1; /* loop has continue */ 381 u_int c_default : 1; /* switch has default */ 382 u_int c_infinite : 1; /* break condition always false 383 (for (;;), while (1)) */ 384 u_int c_rchif : 1; /* end of if-branch reached */ 385 u_int c_noretval : 1; /* had "return;" */ 386 u_int c_retval : 1; /* had "return (e);" */ 387 type_t *c_swtype; /* type of switch expression */ 388 clst_t *c_clst; /* list of case values */ 389 struct mbl *c_fexprm; /* saved memory for end of loop 390 expression in for() */ 391 tnode_t *c_f3expr; /* end of loop expr in for() */ 392 pos_t c_fpos; /* position of end of loop expr */ 393 pos_t c_cfpos; /* same for csrc_pos */ 394 struct cstk *c_nxt; /* outer control statement */ 395 } cstk_t; 396 397 #include "externs1.h" 398 399 #define ERR_SETSIZE 1024 400 #define __NERRBITS (sizeof(unsigned int)) 401 402 typedef struct err_set { 403 unsigned int errs_bits[(ERR_SETSIZE + __NERRBITS-1) / __NERRBITS]; 404 } err_set; 405 406 #define ERR_SET(n, p) \ 407 ((p)->errs_bits[(n)/__NERRBITS] |= (1 << ((n) % __NERRBITS))) 408 #define ERR_CLR(n, p) \ 409 ((p)->errs_bits[(n)/__NERRBITS] &= ~(1 << ((n) % __NERRBITS))) 410 #define ERR_ISSET(n, p) \ 411 ((p)->errs_bits[(n)/__NERRBITS] & (1 << ((n) % __NERRBITS))) 412 #define ERR_ZERO(p) (void)memset((p), 0, sizeof(*(p))) 413 414 extern err_set msgset; 415