| 1 | /* Check calls to formatted I/O functions (-Wformat). |
| 2 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 3 | 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GCC. |
| 7 | |
| 8 | GCC is free software; you can redistribute it and/or modify it under |
| 9 | the terms of the GNU General Public License as published by the Free |
| 10 | Software Foundation; either version 3, or (at your option) any later |
| 11 | version. |
| 12 | |
| 13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| 14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 16 | for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GCC; see the file COPYING3. If not see |
| 20 | <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include "config.h" |
| 23 | #include "system.h" |
| 24 | #include "coretypes.h" |
| 25 | #include "tm.h" |
| 26 | #include "tree.h" |
| 27 | #include "flags.h" |
| 28 | #include "c-common.h" |
| 29 | #include "c-objc.h" |
| 30 | #include "intl.h" |
| 31 | #include "diagnostic-core.h" |
| 32 | #include "langhooks.h" |
| 33 | #include "c-format.h" |
| 34 | #include "alloc-pool.h" |
| 35 | #include "c-target.h" |
| 36 | \f |
| 37 | /* Set format warning options according to a -Wformat=n option. */ |
| 38 | |
| 39 | void |
| 40 | set_Wformat (int setting) |
| 41 | { |
| 42 | warn_format = setting; |
| 43 | warn_format_extra_args = setting; |
| 44 | warn_format_zero_length = setting; |
| 45 | warn_format_contains_nul = setting; |
| 46 | if (setting != 1) |
| 47 | { |
| 48 | warn_format_nonliteral = setting; |
| 49 | warn_format_security = setting; |
| 50 | warn_format_y2k = setting; |
| 51 | } |
| 52 | /* Make sure not to disable -Wnonnull if -Wformat=0 is specified. */ |
| 53 | if (setting) |
| 54 | warn_nonnull = setting; |
| 55 | } |
| 56 | |
| 57 | \f |
| 58 | /* Handle attributes associated with format checking. */ |
| 59 | |
| 60 | /* This must be in the same order as format_types, except for |
| 61 | format_type_error. Target-specific format types do not have |
| 62 | matching enum values. */ |
| 63 | enum format_type { printf_format_type, asm_fprintf_format_type, |
| 64 | gcc_diag_format_type, gcc_tdiag_format_type, |
| 65 | gcc_cdiag_format_type, |
| 66 | gcc_cxxdiag_format_type, gcc_gfc_format_type, |
| 67 | gcc_objc_string_format_type, |
| 68 | format_type_error = -1}; |
| 69 | |
| 70 | typedef struct function_format_info |
| 71 | { |
| 72 | int format_type; /* type of format (printf, scanf, etc.) */ |
| 73 | unsigned HOST_WIDE_INT format_num; /* number of format argument */ |
| 74 | unsigned HOST_WIDE_INT first_arg_num; /* number of first arg (zero for varargs) */ |
| 75 | } function_format_info; |
| 76 | |
| 77 | static bool decode_format_attr (tree, function_format_info *, int); |
| 78 | static int decode_format_type (const char *); |
| 79 | |
| 80 | static bool check_format_string (tree argument, |
| 81 | unsigned HOST_WIDE_INT format_num, |
| 82 | int flags, bool *no_add_attrs, |
| 83 | int expected_format_type); |
| 84 | static bool get_constant (tree expr, unsigned HOST_WIDE_INT *value, |
| 85 | int validated_p); |
| 86 | static const char *convert_format_name_to_system_name (const char *attr_name); |
| 87 | static bool cmp_attribs (const char *tattr_name, const char *attr_name); |
| 88 | |
| 89 | static int first_target_format_type; |
| 90 | static const char *format_name (int format_num); |
| 91 | static int format_flags (int format_num); |
| 92 | |
| 93 | /* Check that we have a pointer to a string suitable for use as a format. |
| 94 | The default is to check for a char type. |
| 95 | For objective-c dialects, this is extended to include references to string |
| 96 | objects validated by objc_string_ref_type_p (). |
| 97 | Targets may also provide a string object type that can be used within c and |
| 98 | c++ and shared with their respective objective-c dialects. In this case the |
| 99 | reference to a format string is checked for validity via a hook. |
| 100 | |
| 101 | The function returns true if strref points to any string type valid for the |
| 102 | language dialect and target. */ |
| 103 | |
| 104 | static bool |
| 105 | valid_stringptr_type_p (tree strref) |
| 106 | { |
| 107 | return (strref != NULL |
| 108 | && TREE_CODE (strref) == POINTER_TYPE |
| 109 | && (TYPE_MAIN_VARIANT (TREE_TYPE (strref)) == char_type_node |
| 110 | || objc_string_ref_type_p (strref) |
| 111 | || (*targetcm.string_object_ref_type_p) ((const_tree) strref))); |
| 112 | } |
| 113 | |
| 114 | /* Handle a "format_arg" attribute; arguments as in |
| 115 | struct attribute_spec.handler. */ |
| 116 | tree |
| 117 | handle_format_arg_attribute (tree *node, tree ARG_UNUSED (name), |
| 118 | tree args, int flags, bool *no_add_attrs) |
| 119 | { |
| 120 | tree type = *node; |
| 121 | tree format_num_expr = TREE_VALUE (args); |
| 122 | unsigned HOST_WIDE_INT format_num = 0; |
| 123 | |
| 124 | if (!get_constant (format_num_expr, &format_num, 0)) |
| 125 | { |
| 126 | error ("format string has invalid operand number"); |
| 127 | *no_add_attrs = true; |
| 128 | return NULL_TREE; |
| 129 | } |
| 130 | |
| 131 | if (prototype_p (type)) |
| 132 | { |
| 133 | /* The format arg can be any string reference valid for the language and |
| 134 | target. We cannot be more specific in this case. */ |
| 135 | if (!check_format_string (type, format_num, flags, no_add_attrs, -1)) |
| 136 | return NULL_TREE; |
| 137 | } |
| 138 | |
| 139 | if (!valid_stringptr_type_p (TREE_TYPE (type))) |
| 140 | { |
| 141 | if (!(flags & (int) ATTR_FLAG_BUILT_IN)) |
| 142 | error ("function does not return string type"); |
| 143 | *no_add_attrs = true; |
| 144 | return NULL_TREE; |
| 145 | } |
| 146 | |
| 147 | return NULL_TREE; |
| 148 | } |
| 149 | |
| 150 | /* Verify that the format_num argument is actually a string reference suitable, |
| 151 | for the language dialect and target (in case the format attribute is in |
| 152 | error). When we know the specific reference type expected, this is also |
| 153 | checked. */ |
| 154 | static bool |
| 155 | check_format_string (tree fntype, unsigned HOST_WIDE_INT format_num, |
| 156 | int flags, bool *no_add_attrs, int expected_format_type) |
| 157 | { |
| 158 | unsigned HOST_WIDE_INT i; |
| 159 | bool is_objc_sref, is_target_sref, is_char_ref; |
| 160 | tree ref; |
| 161 | int fmt_flags; |
| 162 | function_args_iterator iter; |
| 163 | |
| 164 | i = 1; |
| 165 | FOREACH_FUNCTION_ARGS (fntype, ref, iter) |
| 166 | { |
| 167 | if (i == format_num) |
| 168 | break; |
| 169 | i++; |
| 170 | } |
| 171 | |
| 172 | if (!ref |
| 173 | || !valid_stringptr_type_p (ref)) |
| 174 | { |
| 175 | if (!(flags & (int) ATTR_FLAG_BUILT_IN)) |
| 176 | error ("format string argument is not a string type"); |
| 177 | *no_add_attrs = true; |
| 178 | return false; |
| 179 | } |
| 180 | |
| 181 | /* We only know that we want a suitable string reference. */ |
| 182 | if (expected_format_type < 0) |
| 183 | return true; |
| 184 | |
| 185 | /* Now check that the arg matches the expected type. */ |
| 186 | is_char_ref = |
| 187 | (TYPE_MAIN_VARIANT (TREE_TYPE (ref)) == char_type_node); |
| 188 | |
| 189 | fmt_flags = format_flags (expected_format_type); |
| 190 | is_objc_sref = is_target_sref = false; |
| 191 | if (!is_char_ref) |
| 192 | is_objc_sref = objc_string_ref_type_p (ref); |
| 193 | |
| 194 | if (!(fmt_flags & FMT_FLAG_PARSE_ARG_CONVERT_EXTERNAL)) |
| 195 | { |
| 196 | if (is_char_ref) |
| 197 | return true; /* OK, we expected a char and found one. */ |
| 198 | else |
| 199 | { |
| 200 | /* We expected a char but found an extended string type. */ |
| 201 | if (is_objc_sref) |
| 202 | error ("found a %<%s%> reference but the format argument should" |
| 203 | " be a string", format_name (gcc_objc_string_format_type)); |
| 204 | else |
| 205 | error ("found a %qT but the format argument should be a string", |
| 206 | ref); |
| 207 | *no_add_attrs = true; |
| 208 | return false; |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | /* We expect a string object type as the format arg. */ |
| 213 | if (is_char_ref) |
| 214 | { |
| 215 | error ("format argument should be a %<%s%> reference but" |
| 216 | " a string was found", format_name (expected_format_type)); |
| 217 | *no_add_attrs = true; |
| 218 | return false; |
| 219 | } |
| 220 | |
| 221 | /* We will assert that objective-c will support either its own string type |
| 222 | or the target-supplied variant. */ |
| 223 | if (!is_objc_sref) |
| 224 | is_target_sref = (*targetcm.string_object_ref_type_p) ((const_tree) ref); |
| 225 | |
| 226 | if (expected_format_type == (int) gcc_objc_string_format_type |
| 227 | && (is_objc_sref || is_target_sref)) |
| 228 | return true; |
| 229 | |
| 230 | /* We will allow a target string ref to match only itself. */ |
| 231 | if (first_target_format_type |
| 232 | && expected_format_type >= first_target_format_type |
| 233 | && is_target_sref) |
| 234 | return true; |
| 235 | else |
| 236 | { |
| 237 | error ("format argument should be a %<%s%> reference", |
| 238 | format_name (expected_format_type)); |
| 239 | *no_add_attrs = true; |
| 240 | return false; |
| 241 | } |
| 242 | |
| 243 | gcc_unreachable (); |
| 244 | } |
| 245 | |
| 246 | /* Verify EXPR is a constant, and store its value. |
| 247 | If validated_p is true there should be no errors. |
| 248 | Returns true on success, false otherwise. */ |
| 249 | static bool |
| 250 | get_constant (tree expr, unsigned HOST_WIDE_INT *value, int validated_p) |
| 251 | { |
| 252 | if (TREE_CODE (expr) != INTEGER_CST || TREE_INT_CST_HIGH (expr) != 0) |
| 253 | { |
| 254 | gcc_assert (!validated_p); |
| 255 | return false; |
| 256 | } |
| 257 | |
| 258 | *value = TREE_INT_CST_LOW (expr); |
| 259 | |
| 260 | return true; |
| 261 | } |
| 262 | |
| 263 | /* Decode the arguments to a "format" attribute into a |
| 264 | function_format_info structure. It is already known that the list |
| 265 | is of the right length. If VALIDATED_P is true, then these |
| 266 | attributes have already been validated and must not be erroneous; |
| 267 | if false, it will give an error message. Returns true if the |
| 268 | attributes are successfully decoded, false otherwise. */ |
| 269 | |
| 270 | static bool |
| 271 | decode_format_attr (tree args, function_format_info *info, int validated_p) |
| 272 | { |
| 273 | tree format_type_id = TREE_VALUE (args); |
| 274 | tree format_num_expr = TREE_VALUE (TREE_CHAIN (args)); |
| 275 | tree first_arg_num_expr |
| 276 | = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (args))); |
| 277 | |
| 278 | if (TREE_CODE (format_type_id) != IDENTIFIER_NODE) |
| 279 | { |
| 280 | gcc_assert (!validated_p); |
| 281 | error ("unrecognized format specifier"); |
| 282 | return false; |
| 283 | } |
| 284 | else |
| 285 | { |
| 286 | const char *p = IDENTIFIER_POINTER (format_type_id); |
| 287 | |
| 288 | p = convert_format_name_to_system_name (p); |
| 289 | |
| 290 | info->format_type = decode_format_type (p); |
| 291 | |
| 292 | if (!c_dialect_objc () |
| 293 | && info->format_type == gcc_objc_string_format_type) |
| 294 | { |
| 295 | gcc_assert (!validated_p); |
| 296 | warning (OPT_Wformat, "%qE is only allowed in Objective-C dialects", |
| 297 | format_type_id); |
| 298 | info->format_type = format_type_error; |
| 299 | return false; |
| 300 | } |
| 301 | |
| 302 | if (info->format_type == format_type_error) |
| 303 | { |
| 304 | gcc_assert (!validated_p); |
| 305 | warning (OPT_Wformat, "%qE is an unrecognized format function type", |
| 306 | format_type_id); |
| 307 | return false; |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | if (!get_constant (format_num_expr, &info->format_num, validated_p)) |
| 312 | { |
| 313 | error ("format string has invalid operand number"); |
| 314 | return false; |
| 315 | } |
| 316 | |
| 317 | if (!get_constant (first_arg_num_expr, &info->first_arg_num, validated_p)) |
| 318 | { |
| 319 | error ("%<...%> has invalid operand number"); |
| 320 | return false; |
| 321 | } |
| 322 | |
| 323 | if (info->first_arg_num != 0 && info->first_arg_num <= info->format_num) |
| 324 | { |
| 325 | gcc_assert (!validated_p); |
| 326 | error ("format string argument follows the args to be formatted"); |
| 327 | return false; |
| 328 | } |
| 329 | |
| 330 | return true; |
| 331 | } |
| 332 | \f |
| 333 | /* Check a call to a format function against a parameter list. */ |
| 334 | |
| 335 | /* The C standard version C++ is treated as equivalent to |
| 336 | or inheriting from, for the purpose of format features supported. */ |
| 337 | #define CPLUSPLUS_STD_VER STD_C94 |
| 338 | /* The C standard version we are checking formats against when pedantic. */ |
| 339 | #define C_STD_VER ((int) (c_dialect_cxx () \ |
| 340 | ? CPLUSPLUS_STD_VER \ |
| 341 | : (flag_isoc99 \ |
| 342 | ? STD_C99 \ |
| 343 | : (flag_isoc94 ? STD_C94 : STD_C89)))) |
| 344 | /* The name to give to the standard version we are warning about when |
| 345 | pedantic. FEATURE_VER is the version in which the feature warned out |
| 346 | appeared, which is higher than C_STD_VER. */ |
| 347 | #define C_STD_NAME(FEATURE_VER) (c_dialect_cxx () \ |
| 348 | ? "ISO C++" \ |
| 349 | : ((FEATURE_VER) == STD_EXT \ |
| 350 | ? "ISO C" \ |
| 351 | : "ISO C90")) |
| 352 | /* Adjust a C standard version, which may be STD_C9L, to account for |
| 353 | -Wno-long-long. Returns other standard versions unchanged. */ |
| 354 | #define ADJ_STD(VER) ((int) ((VER) == STD_C9L \ |
| 355 | ? (warn_long_long ? STD_C99 : STD_C89) \ |
| 356 | : (VER))) |
| 357 | |
| 358 | /* Enum describing the kind of specifiers present in the format and |
| 359 | requiring an argument. */ |
| 360 | enum format_specifier_kind { |
| 361 | CF_KIND_FORMAT, |
| 362 | CF_KIND_FIELD_WIDTH, |
| 363 | CF_KIND_FIELD_PRECISION |
| 364 | }; |
| 365 | |
| 366 | static const char *kind_descriptions[] = { |
| 367 | N_("format"), |
| 368 | N_("field width specifier"), |
| 369 | N_("field precision specifier") |
| 370 | }; |
| 371 | |
| 372 | /* Structure describing details of a type expected in format checking, |
| 373 | and the type to check against it. */ |
| 374 | typedef struct format_wanted_type |
| 375 | { |
| 376 | /* The type wanted. */ |
| 377 | tree wanted_type; |
| 378 | /* The name of this type to use in diagnostics. */ |
| 379 | const char *wanted_type_name; |
| 380 | /* Should be type checked just for scalar width identity. */ |
| 381 | int scalar_identity_flag; |
| 382 | /* The level of indirection through pointers at which this type occurs. */ |
| 383 | int pointer_count; |
| 384 | /* Whether, when pointer_count is 1, to allow any character type when |
| 385 | pedantic, rather than just the character or void type specified. */ |
| 386 | int char_lenient_flag; |
| 387 | /* Whether the argument, dereferenced once, is written into and so the |
| 388 | argument must not be a pointer to a const-qualified type. */ |
| 389 | int writing_in_flag; |
| 390 | /* Whether the argument, dereferenced once, is read from and so |
| 391 | must not be a NULL pointer. */ |
| 392 | int reading_from_flag; |
| 393 | /* The kind of specifier that this type is used for. */ |
| 394 | enum format_specifier_kind kind; |
| 395 | /* The starting character of the specifier. This never includes the |
| 396 | initial percent sign. */ |
| 397 | const char *format_start; |
| 398 | /* The length of the specifier. */ |
| 399 | int format_length; |
| 400 | /* The actual parameter to check against the wanted type. */ |
| 401 | tree param; |
| 402 | /* The argument number of that parameter. */ |
| 403 | int arg_num; |
| 404 | /* The next type to check for this format conversion, or NULL if none. */ |
| 405 | struct format_wanted_type *next; |
| 406 | } format_wanted_type; |
| 407 | |
| 408 | /* Convenience macro for format_length_info meaning unused. */ |
| 409 | #define NO_FMT NULL, FMT_LEN_none, STD_C89 |
| 410 | |
| 411 | static const format_length_info printf_length_specs[] = |
| 412 | { |
| 413 | { "h", FMT_LEN_h, STD_C89, "hh", FMT_LEN_hh, STD_C99, 0 }, |
| 414 | { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C9L, 0 }, |
| 415 | { "q", FMT_LEN_ll, STD_EXT, NO_FMT, 0 }, |
| 416 | { "L", FMT_LEN_L, STD_C89, NO_FMT, 0 }, |
| 417 | { "z", FMT_LEN_z, STD_C99, NO_FMT, 0 }, |
| 418 | { "Z", FMT_LEN_z, STD_EXT, NO_FMT, 0 }, |
| 419 | { "t", FMT_LEN_t, STD_C99, NO_FMT, 0 }, |
| 420 | { "j", FMT_LEN_j, STD_C99, NO_FMT, 0 }, |
| 421 | { "H", FMT_LEN_H, STD_EXT, NO_FMT, 0 }, |
| 422 | { "D", FMT_LEN_D, STD_EXT, "DD", FMT_LEN_DD, STD_EXT, 0 }, |
| 423 | { NO_FMT, NO_FMT, 0 } |
| 424 | }; |
| 425 | |
| 426 | /* Length specifiers valid for asm_fprintf. */ |
| 427 | static const format_length_info asm_fprintf_length_specs[] = |
| 428 | { |
| 429 | { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C89, 0 }, |
| 430 | { "w", FMT_LEN_none, STD_C89, NO_FMT, 0 }, |
| 431 | { NO_FMT, NO_FMT, 0 } |
| 432 | }; |
| 433 | |
| 434 | /* Length specifiers valid for GCC diagnostics. */ |
| 435 | static const format_length_info gcc_diag_length_specs[] = |
| 436 | { |
| 437 | { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C89, 0 }, |
| 438 | { "w", FMT_LEN_none, STD_C89, NO_FMT, 0 }, |
| 439 | { NO_FMT, NO_FMT, 0 } |
| 440 | }; |
| 441 | |
| 442 | /* The custom diagnostics all accept the same length specifiers. */ |
| 443 | #define gcc_tdiag_length_specs gcc_diag_length_specs |
| 444 | #define gcc_cdiag_length_specs gcc_diag_length_specs |
| 445 | #define gcc_cxxdiag_length_specs gcc_diag_length_specs |
| 446 | |
| 447 | /* This differs from printf_length_specs only in that "Z" is not accepted. */ |
| 448 | static const format_length_info scanf_length_specs[] = |
| 449 | { |
| 450 | { "h", FMT_LEN_h, STD_C89, "hh", FMT_LEN_hh, STD_C99, 0 }, |
| 451 | { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C9L, 0 }, |
| 452 | { "q", FMT_LEN_ll, STD_EXT, NO_FMT, 0 }, |
| 453 | { "L", FMT_LEN_L, STD_C89, NO_FMT, 0 }, |
| 454 | { "z", FMT_LEN_z, STD_C99, NO_FMT, 0 }, |
| 455 | { "t", FMT_LEN_t, STD_C99, NO_FMT, 0 }, |
| 456 | { "j", FMT_LEN_j, STD_C99, NO_FMT, 0 }, |
| 457 | { "H", FMT_LEN_H, STD_EXT, NO_FMT, 0 }, |
| 458 | { "D", FMT_LEN_D, STD_EXT, "DD", FMT_LEN_DD, STD_EXT, 0 }, |
| 459 | { NO_FMT, NO_FMT, 0 } |
| 460 | }; |
| 461 | |
| 462 | |
| 463 | /* All tables for strfmon use STD_C89 everywhere, since -pedantic warnings |
| 464 | make no sense for a format type not part of any C standard version. */ |
| 465 | static const format_length_info strfmon_length_specs[] = |
| 466 | { |
| 467 | /* A GNU extension. */ |
| 468 | { "L", FMT_LEN_L, STD_C89, NO_FMT, 0 }, |
| 469 | { NO_FMT, NO_FMT, 0 } |
| 470 | }; |
| 471 | |
| 472 | |
| 473 | /* For now, the Fortran front-end routines only use l as length modifier. */ |
| 474 | static const format_length_info gcc_gfc_length_specs[] = |
| 475 | { |
| 476 | { "l", FMT_LEN_l, STD_C89, NO_FMT, 0 }, |
| 477 | { NO_FMT, NO_FMT, 0 } |
| 478 | }; |
| 479 | |
| 480 | |
| 481 | static const format_flag_spec printf_flag_specs[] = |
| 482 | { |
| 483 | { ' ', 0, 0, N_("' ' flag"), N_("the ' ' printf flag"), STD_C89 }, |
| 484 | { '+', 0, 0, N_("'+' flag"), N_("the '+' printf flag"), STD_C89 }, |
| 485 | { '#', 0, 0, N_("'#' flag"), N_("the '#' printf flag"), STD_C89 }, |
| 486 | { '0', 0, 0, N_("'0' flag"), N_("the '0' printf flag"), STD_C89 }, |
| 487 | { '-', 0, 0, N_("'-' flag"), N_("the '-' printf flag"), STD_C89 }, |
| 488 | { '\'', 0, 0, N_("''' flag"), N_("the ''' printf flag"), STD_EXT }, |
| 489 | { 'I', 0, 0, N_("'I' flag"), N_("the 'I' printf flag"), STD_EXT }, |
| 490 | { 'w', 0, 0, N_("field width"), N_("field width in printf format"), STD_C89 }, |
| 491 | { 'p', 0, 0, N_("precision"), N_("precision in printf format"), STD_C89 }, |
| 492 | { 'L', 0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 }, |
| 493 | { 0, 0, 0, NULL, NULL, STD_C89 } |
| 494 | }; |
| 495 | |
| 496 | |
| 497 | static const format_flag_pair printf_flag_pairs[] = |
| 498 | { |
| 499 | { ' ', '+', 1, 0 }, |
| 500 | { '0', '-', 1, 0 }, |
| 501 | { '0', 'p', 1, 'i' }, |
| 502 | { 0, 0, 0, 0 } |
| 503 | }; |
| 504 | |
| 505 | static const format_flag_spec asm_fprintf_flag_specs[] = |
| 506 | { |
| 507 | { ' ', 0, 0, N_("' ' flag"), N_("the ' ' printf flag"), STD_C89 }, |
| 508 | { '+', 0, 0, N_("'+' flag"), N_("the '+' printf flag"), STD_C89 }, |
| 509 | { '#', 0, 0, N_("'#' flag"), N_("the '#' printf flag"), STD_C89 }, |
| 510 | { '0', 0, 0, N_("'0' flag"), N_("the '0' printf flag"), STD_C89 }, |
| 511 | { '-', 0, 0, N_("'-' flag"), N_("the '-' printf flag"), STD_C89 }, |
| 512 | { 'w', 0, 0, N_("field width"), N_("field width in printf format"), STD_C89 }, |
| 513 | { 'p', 0, 0, N_("precision"), N_("precision in printf format"), STD_C89 }, |
| 514 | { 'L', 0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 }, |
| 515 | { 0, 0, 0, NULL, NULL, STD_C89 } |
| 516 | }; |
| 517 | |
| 518 | static const format_flag_pair asm_fprintf_flag_pairs[] = |
| 519 | { |
| 520 | { ' ', '+', 1, 0 }, |
| 521 | { '0', '-', 1, 0 }, |
| 522 | { '0', 'p', 1, 'i' }, |
| 523 | { 0, 0, 0, 0 } |
| 524 | }; |
| 525 | |
| 526 | static const format_flag_pair gcc_diag_flag_pairs[] = |
| 527 | { |
| 528 | { 0, 0, 0, 0 } |
| 529 | }; |
| 530 | |
| 531 | #define gcc_tdiag_flag_pairs gcc_diag_flag_pairs |
| 532 | #define gcc_cdiag_flag_pairs gcc_diag_flag_pairs |
| 533 | #define gcc_cxxdiag_flag_pairs gcc_diag_flag_pairs |
| 534 | |
| 535 | static const format_flag_pair gcc_gfc_flag_pairs[] = |
| 536 | { |
| 537 | { 0, 0, 0, 0 } |
| 538 | }; |
| 539 | |
| 540 | static const format_flag_spec gcc_diag_flag_specs[] = |
| 541 | { |
| 542 | { '+', 0, 0, N_("'+' flag"), N_("the '+' printf flag"), STD_C89 }, |
| 543 | { '#', 0, 0, N_("'#' flag"), N_("the '#' printf flag"), STD_C89 }, |
| 544 | { 'q', 0, 0, N_("'q' flag"), N_("the 'q' diagnostic flag"), STD_C89 }, |
| 545 | { 'p', 0, 0, N_("precision"), N_("precision in printf format"), STD_C89 }, |
| 546 | { 'L', 0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 }, |
| 547 | { 0, 0, 0, NULL, NULL, STD_C89 } |
| 548 | }; |
| 549 | |
| 550 | #define gcc_tdiag_flag_specs gcc_diag_flag_specs |
| 551 | #define gcc_cdiag_flag_specs gcc_diag_flag_specs |
| 552 | #define gcc_cxxdiag_flag_specs gcc_diag_flag_specs |
| 553 | |
| 554 | static const format_flag_spec scanf_flag_specs[] = |
| 555 | { |
| 556 | { '*', 0, 0, N_("assignment suppression"), N_("the assignment suppression scanf feature"), STD_C89 }, |
| 557 | { 'a', 0, 0, N_("'a' flag"), N_("the 'a' scanf flag"), STD_EXT }, |
| 558 | { 'm', 0, 0, N_("'m' flag"), N_("the 'm' scanf flag"), STD_EXT }, |
| 559 | { 'w', 0, 0, N_("field width"), N_("field width in scanf format"), STD_C89 }, |
| 560 | { 'L', 0, 0, N_("length modifier"), N_("length modifier in scanf format"), STD_C89 }, |
| 561 | { '\'', 0, 0, N_("''' flag"), N_("the ''' scanf flag"), STD_EXT }, |
| 562 | { 'I', 0, 0, N_("'I' flag"), N_("the 'I' scanf flag"), STD_EXT }, |
| 563 | { 0, 0, 0, NULL, NULL, STD_C89 } |
| 564 | }; |
| 565 | |
| 566 | |
| 567 | static const format_flag_pair scanf_flag_pairs[] = |
| 568 | { |
| 569 | { '*', 'L', 0, 0 }, |
| 570 | { 'a', 'm', 0, 0 }, |
| 571 | { 0, 0, 0, 0 } |
| 572 | }; |
| 573 | |
| 574 | |
| 575 | static const format_flag_spec strftime_flag_specs[] = |
| 576 | { |
| 577 | { '_', 0, 0, N_("'_' flag"), N_("the '_' strftime flag"), STD_EXT }, |
| 578 | { '-', 0, 0, N_("'-' flag"), N_("the '-' strftime flag"), STD_EXT }, |
| 579 | { '0', 0, 0, N_("'0' flag"), N_("the '0' strftime flag"), STD_EXT }, |
| 580 | { '^', 0, 0, N_("'^' flag"), N_("the '^' strftime flag"), STD_EXT }, |
| 581 | { '#', 0, 0, N_("'#' flag"), N_("the '#' strftime flag"), STD_EXT }, |
| 582 | { 'w', 0, 0, N_("field width"), N_("field width in strftime format"), STD_EXT }, |
| 583 | { 'E', 0, 0, N_("'E' modifier"), N_("the 'E' strftime modifier"), STD_C99 }, |
| 584 | { 'O', 0, 0, N_("'O' modifier"), N_("the 'O' strftime modifier"), STD_C99 }, |
| 585 | { 'O', 'o', 0, NULL, N_("the 'O' modifier"), STD_EXT }, |
| 586 | { 0, 0, 0, NULL, NULL, STD_C89 } |
| 587 | }; |
| 588 | |
| 589 | |
| 590 | static const format_flag_pair strftime_flag_pairs[] = |
| 591 | { |
| 592 | { 'E', 'O', 0, 0 }, |
| 593 | { '_', '-', 0, 0 }, |
| 594 | { '_', '0', 0, 0 }, |
| 595 | { '-', '0', 0, 0 }, |
| 596 | { '^', '#', 0, 0 }, |
| 597 | { 0, 0, 0, 0 } |
| 598 | }; |
| 599 | |
| 600 | |
| 601 | static const format_flag_spec strfmon_flag_specs[] = |
| 602 | { |
| 603 | { '=', 0, 1, N_("fill character"), N_("fill character in strfmon format"), STD_C89 }, |
| 604 | { '^', 0, 0, N_("'^' flag"), N_("the '^' strfmon flag"), STD_C89 }, |
| 605 | { '+', 0, 0, N_("'+' flag"), N_("the '+' strfmon flag"), STD_C89 }, |
| 606 | { '(', 0, 0, N_("'(' flag"), N_("the '(' strfmon flag"), STD_C89 }, |
| 607 | { '!', 0, 0, N_("'!' flag"), N_("the '!' strfmon flag"), STD_C89 }, |
| 608 | { '-', 0, 0, N_("'-' flag"), N_("the '-' strfmon flag"), STD_C89 }, |
| 609 | { 'w', 0, 0, N_("field width"), N_("field width in strfmon format"), STD_C89 }, |
| 610 | { '#', 0, 0, N_("left precision"), N_("left precision in strfmon format"), STD_C89 }, |
| 611 | { 'p', 0, 0, N_("right precision"), N_("right precision in strfmon format"), STD_C89 }, |
| 612 | { 'L', 0, 0, N_("length modifier"), N_("length modifier in strfmon format"), STD_C89 }, |
| 613 | { 0, 0, 0, NULL, NULL, STD_C89 } |
| 614 | }; |
| 615 | |
| 616 | static const format_flag_pair strfmon_flag_pairs[] = |
| 617 | { |
| 618 | { '+', '(', 0, 0 }, |
| 619 | { 0, 0, 0, 0 } |
| 620 | }; |
| 621 | |
| 622 | |
| 623 | static const format_char_info dfly_ext_char_info = |
| 624 | { NULL, 1, STD_EXT, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "cR", NULL }; |
| 625 | |
| 626 | static const format_char_info print_char_table[] = |
| 627 | { |
| 628 | /* C89 conversion specifiers. */ |
| 629 | { "di", 0, STD_C89, { T89_I, T99_SC, T89_S, T89_L, T9L_LL, TEX_LL, T99_SST, T99_PD, T99_IM, BADLEN, BADLEN, BADLEN }, "-wp0 +'I", "i", NULL }, |
| 630 | { "oxX", 0, STD_C89, { T89_UI, T99_UC, T89_US, T89_UL, T9L_ULL, TEX_ULL, T99_ST, T99_UPD, T99_UIM, BADLEN, BADLEN, BADLEN }, "-wp0#", "i", NULL }, |
| 631 | { "u", 0, STD_C89, { T89_UI, T99_UC, T89_US, T89_UL, T9L_ULL, TEX_ULL, T99_ST, T99_UPD, T99_UIM, BADLEN, BADLEN, BADLEN }, "-wp0'I", "i", NULL }, |
| 632 | { "fgG", 0, STD_C89, { T89_D, BADLEN, BADLEN, T99_D, BADLEN, T89_LD, BADLEN, BADLEN, BADLEN, TEX_D32, TEX_D64, TEX_D128 }, "-wp0 +#'I", "", NULL }, |
| 633 | { "eE", 0, STD_C89, { T89_D, BADLEN, BADLEN, T99_D, BADLEN, T89_LD, BADLEN, BADLEN, BADLEN, TEX_D32, TEX_D64, TEX_D128 }, "-wp0 +#I", "", NULL }, |
| 634 | { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, T94_WI, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "", NULL }, |
| 635 | { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "cR", NULL }, |
| 636 | { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "c", NULL }, |
| 637 | { "n", 1, STD_C89, { T89_I, T99_SC, T89_S, T89_L, T9L_LL, BADLEN, T99_SST, T99_PD, T99_IM, BADLEN, BADLEN, BADLEN }, "", "W", NULL }, |
| 638 | /* C99 conversion specifiers. */ |
| 639 | { "F", 0, STD_C99, { T99_D, BADLEN, BADLEN, T99_D, BADLEN, T99_LD, BADLEN, BADLEN, BADLEN, TEX_D32, TEX_D64, TEX_D128 }, "-wp0 +#'I", "", NULL }, |
| 640 | { "aA", 0, STD_C99, { T99_D, BADLEN, BADLEN, T99_D, BADLEN, T99_LD, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0 +#", "", NULL }, |
| 641 | /* X/Open conversion specifiers. */ |
| 642 | { "C", 0, STD_EXT, { TEX_WI, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "", NULL }, |
| 643 | { "S", 1, STD_EXT, { TEX_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "R", NULL }, |
| 644 | /* GNU conversion specifiers. */ |
| 645 | { "m", 0, STD_EXT, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "", NULL }, |
| 646 | /* BSD conversion specifiers. */ |
| 647 | /* DragonFly kernel extensions (src/sys/kern/subr_prf.c). |
| 648 | The format %b is supported to decode error registers. |
| 649 | Its usage is: printf("reg=%b\n", regval, "<base><arg>*"); |
| 650 | which produces: reg=3<BITTWO,BITONE> |
| 651 | The format %D provides a hexdump given a pointer and separator string: |
| 652 | ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX |
| 653 | ("%*D", len, ptr, " ") -> XX XX XX XX ... |
| 654 | */ |
| 655 | { "D", 1, STD_EXT, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "cR", &dfly_ext_char_info }, |
| 656 | { "b", 0, STD_EXT, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "", &dfly_ext_char_info }, |
| 657 | { "ry", 0, STD_EXT, { T89_I, BADLEN, BADLEN, T89_L, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0 +#", "i", NULL }, |
| 658 | { NULL, 0, STD_C89, NOLENGTHS, NULL, NULL, NULL } |
| 659 | }; |
| 660 | |
| 661 | static const format_char_info asm_fprintf_char_table[] = |
| 662 | { |
| 663 | /* C89 conversion specifiers. */ |
| 664 | { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0 +", "i", NULL }, |
| 665 | { "oxX", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0#", "i", NULL }, |
| 666 | { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0", "i", NULL }, |
| 667 | { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "", NULL }, |
| 668 | { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "cR", NULL }, |
| 669 | |
| 670 | /* asm_fprintf conversion specifiers. */ |
| 671 | { "O", 0, STD_C89, NOARGUMENTS, "", "", NULL }, |
| 672 | { "R", 0, STD_C89, NOARGUMENTS, "", "", NULL }, |
| 673 | { "I", 0, STD_C89, NOARGUMENTS, "", "", NULL }, |
| 674 | { "L", 0, STD_C89, NOARGUMENTS, "", "", NULL }, |
| 675 | { "U", 0, STD_C89, NOARGUMENTS, "", "", NULL }, |
| 676 | { "r", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "", NULL }, |
| 677 | { "@", 0, STD_C89, NOARGUMENTS, "", "", NULL }, |
| 678 | { NULL, 0, STD_C89, NOLENGTHS, NULL, NULL, NULL } |
| 679 | }; |
| 680 | |
| 681 | static const format_char_info gcc_diag_char_table[] = |
| 682 | { |
| 683 | /* C89 conversion specifiers. */ |
| 684 | { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 685 | { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 686 | { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 687 | { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 688 | { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL }, |
| 689 | { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL }, |
| 690 | |
| 691 | /* Custom conversion specifiers. */ |
| 692 | |
| 693 | /* These will require a "tree" at runtime. */ |
| 694 | { "K", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 695 | |
| 696 | { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL }, |
| 697 | { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL }, |
| 698 | { NULL, 0, STD_C89, NOLENGTHS, NULL, NULL, NULL } |
| 699 | }; |
| 700 | |
| 701 | static const format_char_info gcc_tdiag_char_table[] = |
| 702 | { |
| 703 | /* C89 conversion specifiers. */ |
| 704 | { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 705 | { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 706 | { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 707 | { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 708 | { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL }, |
| 709 | { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL }, |
| 710 | |
| 711 | /* Custom conversion specifiers. */ |
| 712 | |
| 713 | /* These will require a "tree" at runtime. */ |
| 714 | { "DFKTEV", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q+", "", NULL }, |
| 715 | |
| 716 | { "v", 0,STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q#", "", NULL }, |
| 717 | |
| 718 | { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL }, |
| 719 | { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL }, |
| 720 | { NULL, 0, STD_C89, NOLENGTHS, NULL, NULL, NULL } |
| 721 | }; |
| 722 | |
| 723 | static const format_char_info gcc_cdiag_char_table[] = |
| 724 | { |
| 725 | /* C89 conversion specifiers. */ |
| 726 | { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 727 | { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 728 | { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 729 | { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 730 | { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL }, |
| 731 | { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL }, |
| 732 | |
| 733 | /* Custom conversion specifiers. */ |
| 734 | |
| 735 | /* These will require a "tree" at runtime. */ |
| 736 | { "DEFKTV", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q+", "", NULL }, |
| 737 | |
| 738 | { "v", 0,STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q#", "", NULL }, |
| 739 | |
| 740 | { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL }, |
| 741 | { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL }, |
| 742 | { NULL, 0, STD_C89, NOLENGTHS, NULL, NULL, NULL } |
| 743 | }; |
| 744 | |
| 745 | static const format_char_info gcc_cxxdiag_char_table[] = |
| 746 | { |
| 747 | /* C89 conversion specifiers. */ |
| 748 | { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 749 | { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 750 | { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 751 | { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 752 | { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL }, |
| 753 | { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL }, |
| 754 | |
| 755 | /* Custom conversion specifiers. */ |
| 756 | |
| 757 | /* These will require a "tree" at runtime. */ |
| 758 | { "ADEFKSTV",0,STD_C89,{ T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q+#", "", NULL }, |
| 759 | |
| 760 | { "v", 0,STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q#", "", NULL }, |
| 761 | |
| 762 | /* These accept either an 'int' or an 'enum tree_code' (which is handled as an 'int'.) */ |
| 763 | { "CLOPQ",0,STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL }, |
| 764 | |
| 765 | { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL }, |
| 766 | { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL }, |
| 767 | { NULL, 0, STD_C89, NOLENGTHS, NULL, NULL, NULL } |
| 768 | }; |
| 769 | |
| 770 | static const format_char_info gcc_gfc_char_table[] = |
| 771 | { |
| 772 | /* C89 conversion specifiers. */ |
| 773 | { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "", NULL }, |
| 774 | { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "", NULL }, |
| 775 | { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "", NULL }, |
| 776 | { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "cR", NULL }, |
| 777 | |
| 778 | /* gfc conversion specifiers. */ |
| 779 | |
| 780 | { "C", 0, STD_C89, NOARGUMENTS, "", "", NULL }, |
| 781 | |
| 782 | /* This will require a "locus" at runtime. */ |
| 783 | { "L", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "R", NULL }, |
| 784 | |
| 785 | { NULL, 0, STD_C89, NOLENGTHS, NULL, NULL, NULL } |
| 786 | }; |
| 787 | |
| 788 | static const format_char_info scan_char_table[] = |
| 789 | { |
| 790 | /* C89 conversion specifiers. */ |
| 791 | { "di", 1, STD_C89, { T89_I, T99_SC, T89_S, T89_L, T9L_LL, TEX_LL, T99_SST, T99_PD, T99_IM, BADLEN, BADLEN, BADLEN }, "*w'I", "W", NULL }, |
| 792 | { "u", 1, STD_C89, { T89_UI, T99_UC, T89_US, T89_UL, T9L_ULL, TEX_ULL, T99_ST, T99_UPD, T99_UIM, BADLEN, BADLEN, BADLEN }, "*w'I", "W", NULL }, |
| 793 | { "oxX", 1, STD_C89, { T89_UI, T99_UC, T89_US, T89_UL, T9L_ULL, TEX_ULL, T99_ST, T99_UPD, T99_UIM, BADLEN, BADLEN, BADLEN }, "*w", "W", NULL }, |
| 794 | { "efgEG", 1, STD_C89, { T89_F, BADLEN, BADLEN, T89_D, BADLEN, T89_LD, BADLEN, BADLEN, BADLEN, TEX_D32, TEX_D64, TEX_D128 }, "*w'", "W", NULL }, |
| 795 | { "c", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*mw", "cW", NULL }, |
| 796 | { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*amw", "cW", NULL }, |
| 797 | { "[", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*amw", "cW[", NULL }, |
| 798 | { "p", 2, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*w", "W", NULL }, |
| 799 | { "n", 1, STD_C89, { T89_I, T99_SC, T89_S, T89_L, T9L_LL, BADLEN, T99_SST, T99_PD, T99_IM, BADLEN, BADLEN, BADLEN }, "", "W", NULL }, |
| 800 | /* C99 conversion specifiers. */ |
| 801 | { "F", 1, STD_C99, { T99_F, BADLEN, BADLEN, T99_D, BADLEN, T99_LD, BADLEN, BADLEN, BADLEN, TEX_D32, TEX_D64, TEX_D128 }, "*w'", "W", NULL }, |
| 802 | { "aA", 1, STD_C99, { T99_F, BADLEN, BADLEN, T99_D, BADLEN, T99_LD, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*w'", "W", NULL }, |
| 803 | /* X/Open conversion specifiers. */ |
| 804 | { "C", 1, STD_EXT, { TEX_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*mw", "W", NULL }, |
| 805 | { "S", 1, STD_EXT, { TEX_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*amw", "W", NULL }, |
| 806 | { NULL, 0, STD_C89, NOLENGTHS, NULL, NULL, NULL } |
| 807 | }; |
| 808 | |
| 809 | static const format_char_info time_char_table[] = |
| 810 | { |
| 811 | /* C89 conversion specifiers. */ |
| 812 | { "ABZab", 0, STD_C89, NOLENGTHS, "^#", "", NULL }, |
| 813 | { "cx", 0, STD_C89, NOLENGTHS, "E", "3", NULL }, |
| 814 | { "HIMSUWdmw", 0, STD_C89, NOLENGTHS, "-_0Ow", "", NULL }, |
| 815 | { "j", 0, STD_C89, NOLENGTHS, "-_0Ow", "o", NULL }, |
| 816 | { "p", 0, STD_C89, NOLENGTHS, "#", "", NULL }, |
| 817 | { "X", 0, STD_C89, NOLENGTHS, "E", "", NULL }, |
| 818 | { "y", 0, STD_C89, NOLENGTHS, "EO-_0w", "4", NULL }, |
| 819 | { "Y", 0, STD_C89, NOLENGTHS, "-_0EOw", "o", NULL }, |
| 820 | { "%", 0, STD_C89, NOLENGTHS, "", "", NULL }, |
| 821 | /* C99 conversion specifiers. */ |
| 822 | { "C", 0, STD_C99, NOLENGTHS, "-_0EOw", "o", NULL }, |
| 823 | { "D", 0, STD_C99, NOLENGTHS, "", "2", NULL }, |
| 824 | { "eVu", 0, STD_C99, NOLENGTHS, "-_0Ow", "", NULL }, |
| 825 | { "FRTnrt", 0, STD_C99, NOLENGTHS, "", "", NULL }, |
| 826 | { "g", 0, STD_C99, NOLENGTHS, "O-_0w", "2o", NULL }, |
| 827 | { "G", 0, STD_C99, NOLENGTHS, "-_0Ow", "o", NULL }, |
| 828 | { "h", 0, STD_C99, NOLENGTHS, "^#", "", NULL }, |
| 829 | { "z", 0, STD_C99, NOLENGTHS, "O", "o", NULL }, |
| 830 | /* GNU conversion specifiers. */ |
| 831 | { "kls", 0, STD_EXT, NOLENGTHS, "-_0Ow", "", NULL }, |
| 832 | { "P", 0, STD_EXT, NOLENGTHS, "", "", NULL }, |
| 833 | { NULL, 0, STD_C89, NOLENGTHS, NULL, NULL, NULL } |
| 834 | }; |
| 835 | |
| 836 | static const format_char_info monetary_char_table[] = |
| 837 | { |
| 838 | { "in", 0, STD_C89, { T89_D, BADLEN, BADLEN, BADLEN, BADLEN, T89_LD, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "=^+(!-w#p", "", NULL }, |
| 839 | { NULL, 0, STD_C89, NOLENGTHS, NULL, NULL, NULL } |
| 840 | }; |
| 841 | |
| 842 | /* This must be in the same order as enum format_type. */ |
| 843 | static const format_kind_info format_types_orig[] = |
| 844 | { |
| 845 | { "gnu_printf", printf_length_specs, print_char_table, " +#0-'I", NULL, |
| 846 | printf_flag_specs, printf_flag_pairs, |
| 847 | FMT_FLAG_ARG_CONVERT|FMT_FLAG_DOLLAR_MULTIPLE|FMT_FLAG_USE_DOLLAR|FMT_FLAG_EMPTY_PREC_OK, |
| 848 | 'w', 0, 'p', 0, 'L', 0, |
| 849 | &integer_type_node, &integer_type_node |
| 850 | }, |
| 851 | { "asm_fprintf", asm_fprintf_length_specs, asm_fprintf_char_table, " +#0-", NULL, |
| 852 | asm_fprintf_flag_specs, asm_fprintf_flag_pairs, |
| 853 | FMT_FLAG_ARG_CONVERT|FMT_FLAG_EMPTY_PREC_OK, |
| 854 | 'w', 0, 'p', 0, 'L', 0, |
| 855 | NULL, NULL |
| 856 | }, |
| 857 | { "gcc_diag", gcc_diag_length_specs, gcc_diag_char_table, "q+#", NULL, |
| 858 | gcc_diag_flag_specs, gcc_diag_flag_pairs, |
| 859 | FMT_FLAG_ARG_CONVERT, |
| 860 | 0, 0, 'p', 0, 'L', 0, |
| 861 | NULL, &integer_type_node |
| 862 | }, |
| 863 | { "gcc_tdiag", gcc_tdiag_length_specs, gcc_tdiag_char_table, "q+#", NULL, |
| 864 | gcc_tdiag_flag_specs, gcc_tdiag_flag_pairs, |
| 865 | FMT_FLAG_ARG_CONVERT, |
| 866 | 0, 0, 'p', 0, 'L', 0, |
| 867 | NULL, &integer_type_node |
| 868 | }, |
| 869 | { "gcc_cdiag", gcc_cdiag_length_specs, gcc_cdiag_char_table, "q+#", NULL, |
| 870 | gcc_cdiag_flag_specs, gcc_cdiag_flag_pairs, |
| 871 | FMT_FLAG_ARG_CONVERT, |
| 872 | 0, 0, 'p', 0, 'L', 0, |
| 873 | NULL, &integer_type_node |
| 874 | }, |
| 875 | { "gcc_cxxdiag", gcc_cxxdiag_length_specs, gcc_cxxdiag_char_table, "q+#", NULL, |
| 876 | gcc_cxxdiag_flag_specs, gcc_cxxdiag_flag_pairs, |
| 877 | FMT_FLAG_ARG_CONVERT, |
| 878 | 0, 0, 'p', 0, 'L', 0, |
| 879 | NULL, &integer_type_node |
| 880 | }, |
| 881 | { "gcc_gfc", gcc_gfc_length_specs, gcc_gfc_char_table, "", NULL, |
| 882 | NULL, gcc_gfc_flag_pairs, |
| 883 | FMT_FLAG_ARG_CONVERT, |
| 884 | 0, 0, 0, 0, 0, 0, |
| 885 | NULL, NULL |
| 886 | }, |
| 887 | { "NSString", NULL, NULL, NULL, NULL, |
| 888 | NULL, NULL, |
| 889 | FMT_FLAG_ARG_CONVERT|FMT_FLAG_PARSE_ARG_CONVERT_EXTERNAL, 0, 0, 0, 0, 0, 0, |
| 890 | NULL, NULL |
| 891 | }, |
| 892 | { "gnu_scanf", scanf_length_specs, scan_char_table, "*'I", NULL, |
| 893 | scanf_flag_specs, scanf_flag_pairs, |
| 894 | FMT_FLAG_ARG_CONVERT|FMT_FLAG_SCANF_A_KLUDGE|FMT_FLAG_USE_DOLLAR|FMT_FLAG_ZERO_WIDTH_BAD|FMT_FLAG_DOLLAR_GAP_POINTER_OK, |
| 895 | 'w', 0, 0, '*', 'L', 'm', |
| 896 | NULL, NULL |
| 897 | }, |
| 898 | { "gnu_strftime", NULL, time_char_table, "_-0^#", "EO", |
| 899 | strftime_flag_specs, strftime_flag_pairs, |
| 900 | FMT_FLAG_FANCY_PERCENT_OK, 'w', 0, 0, 0, 0, 0, |
| 901 | NULL, NULL |
| 902 | }, |
| 903 | { "gnu_strfmon", strfmon_length_specs, monetary_char_table, "=^+(!-", NULL, |
| 904 | strfmon_flag_specs, strfmon_flag_pairs, |
| 905 | FMT_FLAG_ARG_CONVERT, 'w', '#', 'p', 0, 'L', 0, |
| 906 | NULL, NULL |
| 907 | } |
| 908 | }; |
| 909 | |
| 910 | /* This layer of indirection allows GCC to reassign format_types with |
| 911 | new data if necessary, while still allowing the original data to be |
| 912 | const. */ |
| 913 | static const format_kind_info *format_types = format_types_orig; |
| 914 | /* We can modify this one. We also add target-specific format types |
| 915 | to the end of the array. */ |
| 916 | static format_kind_info *dynamic_format_types; |
| 917 | |
| 918 | static int n_format_types = ARRAY_SIZE (format_types_orig); |
| 919 | |
| 920 | /* Structure detailing the results of checking a format function call |
| 921 | where the format expression may be a conditional expression with |
| 922 | many leaves resulting from nested conditional expressions. */ |
| 923 | typedef struct |
| 924 | { |
| 925 | /* Number of leaves of the format argument that could not be checked |
| 926 | as they were not string literals. */ |
| 927 | int number_non_literal; |
| 928 | /* Number of leaves of the format argument that were null pointers or |
| 929 | string literals, but had extra format arguments. */ |
| 930 | int number_extra_args; |
| 931 | /* Number of leaves of the format argument that were null pointers or |
| 932 | string literals, but had extra format arguments and used $ operand |
| 933 | numbers. */ |
| 934 | int number_dollar_extra_args; |
| 935 | /* Number of leaves of the format argument that were wide string |
| 936 | literals. */ |
| 937 | int number_wide; |
| 938 | /* Number of leaves of the format argument that were empty strings. */ |
| 939 | int number_empty; |
| 940 | /* Number of leaves of the format argument that were unterminated |
| 941 | strings. */ |
| 942 | int number_unterminated; |
| 943 | /* Number of leaves of the format argument that were not counted above. */ |
| 944 | int number_other; |
| 945 | } format_check_results; |
| 946 | |
| 947 | typedef struct |
| 948 | { |
| 949 | format_check_results *res; |
| 950 | function_format_info *info; |
| 951 | tree params; |
| 952 | } format_check_context; |
| 953 | |
| 954 | /* Return the format name (as specified in the original table) for the format |
| 955 | type indicated by format_num. */ |
| 956 | static const char * |
| 957 | format_name (int format_num) |
| 958 | { |
| 959 | if (format_num >= 0 && format_num < n_format_types) |
| 960 | return format_types[format_num].name; |
| 961 | gcc_unreachable (); |
| 962 | } |
| 963 | |
| 964 | /* Return the format flags (as specified in the original table) for the format |
| 965 | type indicated by format_num. */ |
| 966 | static int |
| 967 | format_flags (int format_num) |
| 968 | { |
| 969 | if (format_num >= 0 && format_num < n_format_types) |
| 970 | return format_types[format_num].flags; |
| 971 | gcc_unreachable (); |
| 972 | } |
| 973 | |
| 974 | static void check_format_info (function_format_info *, tree); |
| 975 | static void check_format_arg (void *, tree, unsigned HOST_WIDE_INT); |
| 976 | static void check_format_info_main (format_check_results *, |
| 977 | function_format_info *, |
| 978 | const char *, int, tree, |
| 979 | unsigned HOST_WIDE_INT, alloc_pool); |
| 980 | |
| 981 | static void init_dollar_format_checking (int, tree); |
| 982 | static int maybe_read_dollar_number (const char **, int, |
| 983 | tree, tree *, const format_kind_info *); |
| 984 | static bool avoid_dollar_number (const char *); |
| 985 | static void finish_dollar_format_checking (format_check_results *, int); |
| 986 | |
| 987 | static const format_flag_spec *get_flag_spec (const format_flag_spec *, |
| 988 | int, const char *); |
| 989 | |
| 990 | static void check_format_types (format_wanted_type *); |
| 991 | static void format_type_warning (format_wanted_type *, tree, tree); |
| 992 | |
| 993 | /* Decode a format type from a string, returning the type, or |
| 994 | format_type_error if not valid, in which case the caller should print an |
| 995 | error message. */ |
| 996 | static int |
| 997 | decode_format_type (const char *s) |
| 998 | { |
| 999 | int i; |
| 1000 | int slen; |
| 1001 | |
| 1002 | s = convert_format_name_to_system_name (s); |
| 1003 | slen = strlen (s); |
| 1004 | for (i = 0; i < n_format_types; i++) |
| 1005 | { |
| 1006 | int alen; |
| 1007 | if (!strcmp (s, format_types[i].name)) |
| 1008 | return i; |
| 1009 | alen = strlen (format_types[i].name); |
| 1010 | if (slen == alen + 4 && s[0] == '_' && s[1] == '_' |
| 1011 | && s[slen - 1] == '_' && s[slen - 2] == '_' |
| 1012 | && !strncmp (s + 2, format_types[i].name, alen)) |
| 1013 | return i; |
| 1014 | } |
| 1015 | return format_type_error; |
| 1016 | } |
| 1017 | |
| 1018 | \f |
| 1019 | /* Check the argument list of a call to printf, scanf, etc. |
| 1020 | ATTRS are the attributes on the function type. There are NARGS argument |
| 1021 | values in the array ARGARRAY. |
| 1022 | Also, if -Wmissing-format-attribute, |
| 1023 | warn for calls to vprintf or vscanf in functions with no such format |
| 1024 | attribute themselves. */ |
| 1025 | |
| 1026 | void |
| 1027 | check_function_format (tree attrs, int nargs, tree *argarray) |
| 1028 | { |
| 1029 | tree a; |
| 1030 | |
| 1031 | /* See if this function has any format attributes. */ |
| 1032 | for (a = attrs; a; a = TREE_CHAIN (a)) |
| 1033 | { |
| 1034 | if (is_attribute_p ("format", TREE_PURPOSE (a))) |
| 1035 | { |
| 1036 | /* Yup; check it. */ |
| 1037 | function_format_info info; |
| 1038 | decode_format_attr (TREE_VALUE (a), &info, 1); |
| 1039 | if (warn_format) |
| 1040 | { |
| 1041 | /* FIXME: Rewrite all the internal functions in this file |
| 1042 | to use the ARGARRAY directly instead of constructing this |
| 1043 | temporary list. */ |
| 1044 | tree params = NULL_TREE; |
| 1045 | int i; |
| 1046 | for (i = nargs - 1; i >= 0; i--) |
| 1047 | params = tree_cons (NULL_TREE, argarray[i], params); |
| 1048 | check_format_info (&info, params); |
| 1049 | } |
| 1050 | if (warn_missing_format_attribute && info.first_arg_num == 0 |
| 1051 | && (format_types[info.format_type].flags |
| 1052 | & (int) FMT_FLAG_ARG_CONVERT)) |
| 1053 | { |
| 1054 | tree c; |
| 1055 | for (c = TYPE_ATTRIBUTES (TREE_TYPE (current_function_decl)); |
| 1056 | c; |
| 1057 | c = TREE_CHAIN (c)) |
| 1058 | if (is_attribute_p ("format", TREE_PURPOSE (c)) |
| 1059 | && (decode_format_type (IDENTIFIER_POINTER |
| 1060 | (TREE_VALUE (TREE_VALUE (c)))) |
| 1061 | == info.format_type)) |
| 1062 | break; |
| 1063 | if (c == NULL_TREE) |
| 1064 | { |
| 1065 | /* Check if the current function has a parameter to which |
| 1066 | the format attribute could be attached; if not, it |
| 1067 | can't be a candidate for a format attribute, despite |
| 1068 | the vprintf-like or vscanf-like call. */ |
| 1069 | tree args; |
| 1070 | for (args = DECL_ARGUMENTS (current_function_decl); |
| 1071 | args != 0; |
| 1072 | args = DECL_CHAIN (args)) |
| 1073 | { |
| 1074 | if (TREE_CODE (TREE_TYPE (args)) == POINTER_TYPE |
| 1075 | && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (args))) |
| 1076 | == char_type_node)) |
| 1077 | break; |
| 1078 | } |
| 1079 | if (args != 0) |
| 1080 | warning (OPT_Wmissing_format_attribute, "function might " |
| 1081 | "be possible candidate for %qs format attribute", |
| 1082 | format_types[info.format_type].name); |
| 1083 | } |
| 1084 | } |
| 1085 | } |
| 1086 | } |
| 1087 | } |
| 1088 | |
| 1089 | |
| 1090 | /* Variables used by the checking of $ operand number formats. */ |
| 1091 | static char *dollar_arguments_used = NULL; |
| 1092 | static char *dollar_arguments_pointer_p = NULL; |
| 1093 | static int dollar_arguments_alloc = 0; |
| 1094 | static int dollar_arguments_count; |
| 1095 | static int dollar_first_arg_num; |
| 1096 | static int dollar_max_arg_used; |
| 1097 | static int dollar_format_warned; |
| 1098 | |
| 1099 | /* Initialize the checking for a format string that may contain $ |
| 1100 | parameter number specifications; we will need to keep track of whether |
| 1101 | each parameter has been used. FIRST_ARG_NUM is the number of the first |
| 1102 | argument that is a parameter to the format, or 0 for a vprintf-style |
| 1103 | function; PARAMS is the list of arguments starting at this argument. */ |
| 1104 | |
| 1105 | static void |
| 1106 | init_dollar_format_checking (int first_arg_num, tree params) |
| 1107 | { |
| 1108 | tree oparams = params; |
| 1109 | |
| 1110 | dollar_first_arg_num = first_arg_num; |
| 1111 | dollar_arguments_count = 0; |
| 1112 | dollar_max_arg_used = 0; |
| 1113 | dollar_format_warned = 0; |
| 1114 | if (first_arg_num > 0) |
| 1115 | { |
| 1116 | while (params) |
| 1117 | { |
| 1118 | dollar_arguments_count++; |
| 1119 | params = TREE_CHAIN (params); |
| 1120 | } |
| 1121 | } |
| 1122 | if (dollar_arguments_alloc < dollar_arguments_count) |
| 1123 | { |
| 1124 | free (dollar_arguments_used); |
| 1125 | free (dollar_arguments_pointer_p); |
| 1126 | dollar_arguments_alloc = dollar_arguments_count; |
| 1127 | dollar_arguments_used = XNEWVEC (char, dollar_arguments_alloc); |
| 1128 | dollar_arguments_pointer_p = XNEWVEC (char, dollar_arguments_alloc); |
| 1129 | } |
| 1130 | if (dollar_arguments_alloc) |
| 1131 | { |
| 1132 | memset (dollar_arguments_used, 0, dollar_arguments_alloc); |
| 1133 | if (first_arg_num > 0) |
| 1134 | { |
| 1135 | int i = 0; |
| 1136 | params = oparams; |
| 1137 | while (params) |
| 1138 | { |
| 1139 | dollar_arguments_pointer_p[i] = (TREE_CODE (TREE_TYPE (TREE_VALUE (params))) |
| 1140 | == POINTER_TYPE); |
| 1141 | params = TREE_CHAIN (params); |
| 1142 | i++; |
| 1143 | } |
| 1144 | } |
| 1145 | } |
| 1146 | } |
| 1147 | |
| 1148 | |
| 1149 | /* Look for a decimal number followed by a $ in *FORMAT. If DOLLAR_NEEDED |
| 1150 | is set, it is an error if one is not found; otherwise, it is OK. If |
| 1151 | such a number is found, check whether it is within range and mark that |
| 1152 | numbered operand as being used for later checking. Returns the operand |
| 1153 | number if found and within range, zero if no such number was found and |
| 1154 | this is OK, or -1 on error. PARAMS points to the first operand of the |
| 1155 | format; PARAM_PTR is made to point to the parameter referred to. If |
| 1156 | a $ format is found, *FORMAT is updated to point just after it. */ |
| 1157 | |
| 1158 | static int |
| 1159 | maybe_read_dollar_number (const char **format, |
| 1160 | int dollar_needed, tree params, tree *param_ptr, |
| 1161 | const format_kind_info *fki) |
| 1162 | { |
| 1163 | int argnum; |
| 1164 | int overflow_flag; |
| 1165 | const char *fcp = *format; |
| 1166 | if (!ISDIGIT (*fcp)) |
| 1167 | { |
| 1168 | if (dollar_needed) |
| 1169 | { |
| 1170 | warning (OPT_Wformat, "missing $ operand number in format"); |
| 1171 | return -1; |
| 1172 | } |
| 1173 | else |
| 1174 | return 0; |
| 1175 | } |
| 1176 | argnum = 0; |
| 1177 | overflow_flag = 0; |
| 1178 | while (ISDIGIT (*fcp)) |
| 1179 | { |
| 1180 | int nargnum; |
| 1181 | nargnum = 10 * argnum + (*fcp - '0'); |
| 1182 | if (nargnum < 0 || nargnum / 10 != argnum) |
| 1183 | overflow_flag = 1; |
| 1184 | argnum = nargnum; |
| 1185 | fcp++; |
| 1186 | } |
| 1187 | if (*fcp != '$') |
| 1188 | { |
| 1189 | if (dollar_needed) |
| 1190 | { |
| 1191 | warning (OPT_Wformat, "missing $ operand number in format"); |
| 1192 | return -1; |
| 1193 | } |
| 1194 | else |
| 1195 | return 0; |
| 1196 | } |
| 1197 | *format = fcp + 1; |
| 1198 | if (pedantic && !dollar_format_warned) |
| 1199 | { |
| 1200 | warning (OPT_Wformat, "%s does not support %%n$ operand number formats", |
| 1201 | C_STD_NAME (STD_EXT)); |
| 1202 | dollar_format_warned = 1; |
| 1203 | } |
| 1204 | if (overflow_flag || argnum == 0 |
| 1205 | || (dollar_first_arg_num && argnum > dollar_arguments_count)) |
| 1206 | { |
| 1207 | warning (OPT_Wformat, "operand number out of range in format"); |
| 1208 | return -1; |
| 1209 | } |
| 1210 | if (argnum > dollar_max_arg_used) |
| 1211 | dollar_max_arg_used = argnum; |
| 1212 | /* For vprintf-style functions we may need to allocate more memory to |
| 1213 | track which arguments are used. */ |
| 1214 | while (dollar_arguments_alloc < dollar_max_arg_used) |
| 1215 | { |
| 1216 | int nalloc; |
| 1217 | nalloc = 2 * dollar_arguments_alloc + 16; |
| 1218 | dollar_arguments_used = XRESIZEVEC (char, dollar_arguments_used, |
| 1219 | nalloc); |
| 1220 | dollar_arguments_pointer_p = XRESIZEVEC (char, dollar_arguments_pointer_p, |
| 1221 | nalloc); |
| 1222 | memset (dollar_arguments_used + dollar_arguments_alloc, 0, |
| 1223 | nalloc - dollar_arguments_alloc); |
| 1224 | dollar_arguments_alloc = nalloc; |
| 1225 | } |
| 1226 | if (!(fki->flags & (int) FMT_FLAG_DOLLAR_MULTIPLE) |
| 1227 | && dollar_arguments_used[argnum - 1] == 1) |
| 1228 | { |
| 1229 | dollar_arguments_used[argnum - 1] = 2; |
| 1230 | warning (OPT_Wformat, "format argument %d used more than once in %s format", |
| 1231 | argnum, fki->name); |
| 1232 | } |
| 1233 | else |
| 1234 | dollar_arguments_used[argnum - 1] = 1; |
| 1235 | if (dollar_first_arg_num) |
| 1236 | { |
| 1237 | int i; |
| 1238 | *param_ptr = params; |
| 1239 | for (i = 1; i < argnum && *param_ptr != 0; i++) |
| 1240 | *param_ptr = TREE_CHAIN (*param_ptr); |
| 1241 | |
| 1242 | /* This case shouldn't be caught here. */ |
| 1243 | gcc_assert (*param_ptr); |
| 1244 | } |
| 1245 | else |
| 1246 | *param_ptr = 0; |
| 1247 | return argnum; |
| 1248 | } |
| 1249 | |
| 1250 | /* Ensure that FORMAT does not start with a decimal number followed by |
| 1251 | a $; give a diagnostic and return true if it does, false otherwise. */ |
| 1252 | |
| 1253 | static bool |
| 1254 | avoid_dollar_number (const char *format) |
| 1255 | { |
| 1256 | if (!ISDIGIT (*format)) |
| 1257 | return false; |
| 1258 | while (ISDIGIT (*format)) |
| 1259 | format++; |
| 1260 | if (*format == '$') |
| 1261 | { |
| 1262 | warning (OPT_Wformat, "$ operand number used after format without operand number"); |
| 1263 | return true; |
| 1264 | } |
| 1265 | return false; |
| 1266 | } |
| 1267 | |
| 1268 | |
| 1269 | /* Finish the checking for a format string that used $ operand number formats |
| 1270 | instead of non-$ formats. We check for unused operands before used ones |
| 1271 | (a serious error, since the implementation of the format function |
| 1272 | can't know what types to pass to va_arg to find the later arguments). |
| 1273 | and for unused operands at the end of the format (if we know how many |
| 1274 | arguments the format had, so not for vprintf). If there were operand |
| 1275 | numbers out of range on a non-vprintf-style format, we won't have reached |
| 1276 | here. If POINTER_GAP_OK, unused arguments are OK if all arguments are |
| 1277 | pointers. */ |
| 1278 | |
| 1279 | static void |
| 1280 | finish_dollar_format_checking (format_check_results *res, int pointer_gap_ok) |
| 1281 | { |
| 1282 | int i; |
| 1283 | bool found_pointer_gap = false; |
| 1284 | for (i = 0; i < dollar_max_arg_used; i++) |
| 1285 | { |
| 1286 | if (!dollar_arguments_used[i]) |
| 1287 | { |
| 1288 | if (pointer_gap_ok && (dollar_first_arg_num == 0 |
| 1289 | || dollar_arguments_pointer_p[i])) |
| 1290 | found_pointer_gap = true; |
| 1291 | else |
| 1292 | warning (OPT_Wformat, |
| 1293 | "format argument %d unused before used argument %d in $-style format", |
| 1294 | i + 1, dollar_max_arg_used); |
| 1295 | } |
| 1296 | } |
| 1297 | if (found_pointer_gap |
| 1298 | || (dollar_first_arg_num |
| 1299 | && dollar_max_arg_used < dollar_arguments_count)) |
| 1300 | { |
| 1301 | res->number_other--; |
| 1302 | res->number_dollar_extra_args++; |
| 1303 | } |
| 1304 | } |
| 1305 | |
| 1306 | |
| 1307 | /* Retrieve the specification for a format flag. SPEC contains the |
| 1308 | specifications for format flags for the applicable kind of format. |
| 1309 | FLAG is the flag in question. If PREDICATES is NULL, the basic |
| 1310 | spec for that flag must be retrieved and must exist. If |
| 1311 | PREDICATES is not NULL, it is a string listing possible predicates |
| 1312 | for the spec entry; if an entry predicated on any of these is |
| 1313 | found, it is returned, otherwise NULL is returned. */ |
| 1314 | |
| 1315 | static const format_flag_spec * |
| 1316 | get_flag_spec (const format_flag_spec *spec, int flag, const char *predicates) |
| 1317 | { |
| 1318 | int i; |
| 1319 | for (i = 0; spec[i].flag_char != 0; i++) |
| 1320 | { |
| 1321 | if (spec[i].flag_char != flag) |
| 1322 | continue; |
| 1323 | if (predicates != NULL) |
| 1324 | { |
| 1325 | if (spec[i].predicate != 0 |
| 1326 | && strchr (predicates, spec[i].predicate) != 0) |
| 1327 | return &spec[i]; |
| 1328 | } |
| 1329 | else if (spec[i].predicate == 0) |
| 1330 | return &spec[i]; |
| 1331 | } |
| 1332 | gcc_assert (predicates); |
| 1333 | return NULL; |
| 1334 | } |
| 1335 | |
| 1336 | |
| 1337 | /* Check the argument list of a call to printf, scanf, etc. |
| 1338 | INFO points to the function_format_info structure. |
| 1339 | PARAMS is the list of argument values. */ |
| 1340 | |
| 1341 | static void |
| 1342 | check_format_info (function_format_info *info, tree params) |
| 1343 | { |
| 1344 | format_check_context format_ctx; |
| 1345 | unsigned HOST_WIDE_INT arg_num; |
| 1346 | tree format_tree; |
| 1347 | format_check_results res; |
| 1348 | /* Skip to format argument. If the argument isn't available, there's |
| 1349 | no work for us to do; prototype checking will catch the problem. */ |
| 1350 | for (arg_num = 1; ; ++arg_num) |
| 1351 | { |
| 1352 | if (params == 0) |
| 1353 | return; |
| 1354 | if (arg_num == info->format_num) |
| 1355 | break; |
| 1356 | params = TREE_CHAIN (params); |
| 1357 | } |
| 1358 | format_tree = TREE_VALUE (params); |
| 1359 | params = TREE_CHAIN (params); |
| 1360 | if (format_tree == 0) |
| 1361 | return; |
| 1362 | |
| 1363 | res.number_non_literal = 0; |
| 1364 | res.number_extra_args = 0; |
| 1365 | res.number_dollar_extra_args = 0; |
| 1366 | res.number_wide = 0; |
| 1367 | res.number_empty = 0; |
| 1368 | res.number_unterminated = 0; |
| 1369 | res.number_other = 0; |
| 1370 | |
| 1371 | format_ctx.res = &res; |
| 1372 | format_ctx.info = info; |
| 1373 | format_ctx.params = params; |
| 1374 | |
| 1375 | check_function_arguments_recurse (check_format_arg, &format_ctx, |
| 1376 | format_tree, arg_num); |
| 1377 | |
| 1378 | if (res.number_non_literal > 0) |
| 1379 | { |
| 1380 | /* Functions taking a va_list normally pass a non-literal format |
| 1381 | string. These functions typically are declared with |
| 1382 | first_arg_num == 0, so avoid warning in those cases. */ |
| 1383 | if (!(format_types[info->format_type].flags & (int) FMT_FLAG_ARG_CONVERT)) |
| 1384 | { |
| 1385 | /* For strftime-like formats, warn for not checking the format |
| 1386 | string; but there are no arguments to check. */ |
| 1387 | warning (OPT_Wformat_nonliteral, |
| 1388 | "format not a string literal, format string not checked"); |
| 1389 | } |
| 1390 | else if (info->first_arg_num != 0) |
| 1391 | { |
| 1392 | /* If there are no arguments for the format at all, we may have |
| 1393 | printf (foo) which is likely to be a security hole. */ |
| 1394 | while (arg_num + 1 < info->first_arg_num) |
| 1395 | { |
| 1396 | if (params == 0) |
| 1397 | break; |
| 1398 | params = TREE_CHAIN (params); |
| 1399 | ++arg_num; |
| 1400 | } |
| 1401 | if (params == 0 && warn_format_security) |
| 1402 | warning (OPT_Wformat_security, |
| 1403 | "format not a string literal and no format arguments"); |
| 1404 | else if (params == 0 && warn_format_nonliteral) |
| 1405 | warning (OPT_Wformat_nonliteral, |
| 1406 | "format not a string literal and no format arguments"); |
| 1407 | else |
| 1408 | warning (OPT_Wformat_nonliteral, |
| 1409 | "format not a string literal, argument types not checked"); |
| 1410 | } |
| 1411 | } |
| 1412 | |
| 1413 | /* If there were extra arguments to the format, normally warn. However, |
| 1414 | the standard does say extra arguments are ignored, so in the specific |
| 1415 | case where we have multiple leaves (conditional expressions or |
| 1416 | ngettext) allow extra arguments if at least one leaf didn't have extra |
| 1417 | arguments, but was otherwise OK (either non-literal or checked OK). |
| 1418 | If the format is an empty string, this should be counted similarly to the |
| 1419 | case of extra format arguments. */ |
| 1420 | if (res.number_extra_args > 0 && res.number_non_literal == 0 |
| 1421 | && res.number_other == 0) |
| 1422 | warning (OPT_Wformat_extra_args, "too many arguments for format"); |
| 1423 | if (res.number_dollar_extra_args > 0 && res.number_non_literal == 0 |
| 1424 | && res.number_other == 0) |
| 1425 | warning (OPT_Wformat_extra_args, "unused arguments in $-style format"); |
| 1426 | if (res.number_empty > 0 && res.number_non_literal == 0 |
| 1427 | && res.number_other == 0) |
| 1428 | warning (OPT_Wformat_zero_length, "zero-length %s format string", |
| 1429 | format_types[info->format_type].name); |
| 1430 | |
| 1431 | if (res.number_wide > 0) |
| 1432 | warning (OPT_Wformat, "format is a wide character string"); |
| 1433 | |
| 1434 | if (res.number_unterminated > 0) |
| 1435 | warning (OPT_Wformat, "unterminated format string"); |
| 1436 | } |
| 1437 | |
| 1438 | /* Callback from check_function_arguments_recurse to check a |
| 1439 | format string. FORMAT_TREE is the format parameter. ARG_NUM |
| 1440 | is the number of the format argument. CTX points to a |
| 1441 | format_check_context. */ |
| 1442 | |
| 1443 | static void |
| 1444 | check_format_arg (void *ctx, tree format_tree, |
| 1445 | unsigned HOST_WIDE_INT arg_num) |
| 1446 | { |
| 1447 | format_check_context *format_ctx = (format_check_context *) ctx; |
| 1448 | format_check_results *res = format_ctx->res; |
| 1449 | function_format_info *info = format_ctx->info; |
| 1450 | tree params = format_ctx->params; |
| 1451 | |
| 1452 | int format_length; |
| 1453 | HOST_WIDE_INT offset; |
| 1454 | const char *format_chars; |
| 1455 | tree array_size = 0; |
| 1456 | tree array_init; |
| 1457 | alloc_pool fwt_pool; |
| 1458 | |
| 1459 | if (integer_zerop (format_tree)) |
| 1460 | { |
| 1461 | /* Skip to first argument to check, so we can see if this format |
| 1462 | has any arguments (it shouldn't). */ |
| 1463 | while (arg_num + 1 < info->first_arg_num) |
| 1464 | { |
| 1465 | if (params == 0) |
| 1466 | return; |
| 1467 | params = TREE_CHAIN (params); |
| 1468 | ++arg_num; |
| 1469 | } |
| 1470 | |
| 1471 | if (params == 0) |
| 1472 | res->number_other++; |
| 1473 | else |
| 1474 | res->number_extra_args++; |
| 1475 | |
| 1476 | return; |
| 1477 | } |
| 1478 | |
| 1479 | offset = 0; |
| 1480 | if (TREE_CODE (format_tree) == POINTER_PLUS_EXPR) |
| 1481 | { |
| 1482 | tree arg0, arg1; |
| 1483 | |
| 1484 | arg0 = TREE_OPERAND (format_tree, 0); |
| 1485 | arg1 = TREE_OPERAND (format_tree, 1); |
| 1486 | STRIP_NOPS (arg0); |
| 1487 | STRIP_NOPS (arg1); |
| 1488 | if (TREE_CODE (arg1) == INTEGER_CST) |
| 1489 | format_tree = arg0; |
| 1490 | else |
| 1491 | { |
| 1492 | res->number_non_literal++; |
| 1493 | return; |
| 1494 | } |
| 1495 | if (!host_integerp (arg1, 0) |
| 1496 | || (offset = tree_low_cst (arg1, 0)) < 0) |
| 1497 | { |
| 1498 | res->number_non_literal++; |
| 1499 | return; |
| 1500 | } |
| 1501 | } |
| 1502 | if (TREE_CODE (format_tree) != ADDR_EXPR) |
| 1503 | { |
| 1504 | res->number_non_literal++; |
| 1505 | return; |
| 1506 | } |
| 1507 | format_tree = TREE_OPERAND (format_tree, 0); |
| 1508 | if (format_types[info->format_type].flags |
| 1509 | & (int) FMT_FLAG_PARSE_ARG_CONVERT_EXTERNAL) |
| 1510 | { |
| 1511 | bool objc_str = (info->format_type == gcc_objc_string_format_type); |
| 1512 | /* We cannot examine this string here - but we can check that it is |
| 1513 | a valid type. */ |
| 1514 | if (TREE_CODE (format_tree) != CONST_DECL |
| 1515 | || !((objc_str && objc_string_ref_type_p (TREE_TYPE (format_tree))) |
| 1516 | || (*targetcm.string_object_ref_type_p) |
| 1517 | ((const_tree) TREE_TYPE (format_tree)))) |
| 1518 | { |
| 1519 | res->number_non_literal++; |
| 1520 | return; |
| 1521 | } |
| 1522 | /* Skip to first argument to check. */ |
| 1523 | while (arg_num + 1 < info->first_arg_num) |
| 1524 | { |
| 1525 | if (params == 0) |
| 1526 | return; |
| 1527 | params = TREE_CHAIN (params); |
| 1528 | ++arg_num; |
| 1529 | } |
| 1530 | /* So, we have a valid literal string object and one or more params. |
| 1531 | We need to use an external helper to parse the string into format |
| 1532 | info. For Objective-C variants we provide the resource within the |
| 1533 | objc tree, for target variants, via a hook. */ |
| 1534 | if (objc_str) |
| 1535 | objc_check_format_arg (format_tree, params); |
| 1536 | else if (targetcm.check_string_object_format_arg) |
| 1537 | (*targetcm.check_string_object_format_arg) (format_tree, params); |
| 1538 | /* Else we can't handle it and retire quietly. */ |
| 1539 | return; |
| 1540 | } |
| 1541 | if (TREE_CODE (format_tree) == ARRAY_REF |
| 1542 | && host_integerp (TREE_OPERAND (format_tree, 1), 0) |
| 1543 | && (offset += tree_low_cst (TREE_OPERAND (format_tree, 1), 0)) >= 0) |
| 1544 | format_tree = TREE_OPERAND (format_tree, 0); |
| 1545 | if (TREE_CODE (format_tree) == VAR_DECL |
| 1546 | && TREE_CODE (TREE_TYPE (format_tree)) == ARRAY_TYPE |
| 1547 | && (array_init = decl_constant_value (format_tree)) != format_tree |
| 1548 | && TREE_CODE (array_init) == STRING_CST) |
| 1549 | { |
| 1550 | /* Extract the string constant initializer. Note that this may include |
| 1551 | a trailing NUL character that is not in the array (e.g. |
| 1552 | const char a[3] = "foo";). */ |
| 1553 | array_size = DECL_SIZE_UNIT (format_tree); |
| 1554 | format_tree = array_init; |
| 1555 | } |
| 1556 | if (TREE_CODE (format_tree) != STRING_CST) |
| 1557 | { |
| 1558 | res->number_non_literal++; |
| 1559 | return; |
| 1560 | } |
| 1561 | if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (format_tree))) != char_type_node) |
| 1562 | { |
| 1563 | res->number_wide++; |
| 1564 | return; |
| 1565 | } |
| 1566 | format_chars = TREE_STRING_POINTER (format_tree); |
| 1567 | format_length = TREE_STRING_LENGTH (format_tree); |
| 1568 | if (array_size != 0) |
| 1569 | { |
| 1570 | /* Variable length arrays can't be initialized. */ |
| 1571 | gcc_assert (TREE_CODE (array_size) == INTEGER_CST); |
| 1572 | |
| 1573 | if (host_integerp (array_size, 0)) |
| 1574 | { |
| 1575 | HOST_WIDE_INT array_size_value = TREE_INT_CST_LOW (array_size); |
| 1576 | if (array_size_value > 0 |
| 1577 | && array_size_value == (int) array_size_value |
| 1578 | && format_length > array_size_value) |
| 1579 | format_length = array_size_value; |
| 1580 | } |
| 1581 | } |
| 1582 | if (offset) |
| 1583 | { |
| 1584 | if (offset >= format_length) |
| 1585 | { |
| 1586 | res->number_non_literal++; |
| 1587 | return; |
| 1588 | } |
| 1589 | format_chars += offset; |
| 1590 | format_length -= offset; |
| 1591 | } |
| 1592 | if (format_length < 1 || format_chars[--format_length] != 0) |
| 1593 | { |
| 1594 | res->number_unterminated++; |
| 1595 | return; |
| 1596 | } |
| 1597 | if (format_length == 0) |
| 1598 | { |
| 1599 | res->number_empty++; |
| 1600 | return; |
| 1601 | } |
| 1602 | |
| 1603 | /* Skip to first argument to check. */ |
| 1604 | while (arg_num + 1 < info->first_arg_num) |
| 1605 | { |
| 1606 | if (params == 0) |
| 1607 | return; |
| 1608 | params = TREE_CHAIN (params); |
| 1609 | ++arg_num; |
| 1610 | } |
| 1611 | /* Provisionally increment res->number_other; check_format_info_main |
| 1612 | will decrement it if it finds there are extra arguments, but this way |
| 1613 | need not adjust it for every return. */ |
| 1614 | res->number_other++; |
| 1615 | fwt_pool = create_alloc_pool ("format_wanted_type pool", |
| 1616 | sizeof (format_wanted_type), 10); |
| 1617 | check_format_info_main (res, info, format_chars, format_length, |
| 1618 | params, arg_num, fwt_pool); |
| 1619 | free_alloc_pool (fwt_pool); |
| 1620 | } |
| 1621 | |
| 1622 | |
| 1623 | /* Do the main part of checking a call to a format function. FORMAT_CHARS |
| 1624 | is the NUL-terminated format string (which at this point may contain |
| 1625 | internal NUL characters); FORMAT_LENGTH is its length (excluding the |
| 1626 | terminating NUL character). ARG_NUM is one less than the number of |
| 1627 | the first format argument to check; PARAMS points to that format |
| 1628 | argument in the list of arguments. */ |
| 1629 | |
| 1630 | static void |
| 1631 | check_format_info_main (format_check_results *res, |
| 1632 | function_format_info *info, const char *format_chars, |
| 1633 | int format_length, tree params, |
| 1634 | unsigned HOST_WIDE_INT arg_num, alloc_pool fwt_pool) |
| 1635 | { |
| 1636 | const char *orig_format_chars = format_chars; |
| 1637 | tree first_fillin_param = params; |
| 1638 | |
| 1639 | const format_kind_info *fki = &format_types[info->format_type]; |
| 1640 | const format_flag_spec *flag_specs = fki->flag_specs; |
| 1641 | const format_flag_pair *bad_flag_pairs = fki->bad_flag_pairs; |
| 1642 | |
| 1643 | /* -1 if no conversions taking an operand have been found; 0 if one has |
| 1644 | and it didn't use $; 1 if $ formats are in use. */ |
| 1645 | int has_operand_number = -1; |
| 1646 | |
| 1647 | init_dollar_format_checking (info->first_arg_num, first_fillin_param); |
| 1648 | |
| 1649 | while (*format_chars != 0) |
| 1650 | { |
| 1651 | int i; |
| 1652 | int suppressed = FALSE; |
| 1653 | const char *length_chars = NULL; |
| 1654 | enum format_lengths length_chars_val = FMT_LEN_none; |
| 1655 | enum format_std_version length_chars_std = STD_C89; |
| 1656 | int format_char; |
| 1657 | tree cur_param; |
| 1658 | tree wanted_type; |
| 1659 | int main_arg_num = 0; |
| 1660 | tree main_arg_params = 0; |
| 1661 | enum format_std_version wanted_type_std; |
| 1662 | const char *wanted_type_name; |
| 1663 | format_wanted_type width_wanted_type; |
| 1664 | format_wanted_type precision_wanted_type; |
| 1665 | format_wanted_type main_wanted_type; |
| 1666 | format_wanted_type *first_wanted_type = NULL; |
| 1667 | format_wanted_type *last_wanted_type = NULL; |
| 1668 | const format_length_info *fli = NULL; |
| 1669 | const format_char_info *fci = NULL; |
| 1670 | char flag_chars[256]; |
| 1671 | int alloc_flag = 0; |
| 1672 | int scalar_identity_flag = 0; |
| 1673 | const char *format_start; |
| 1674 | |
| 1675 | if (*format_chars++ != '%') |
| 1676 | continue; |
| 1677 | if (*format_chars == 0) |
| 1678 | { |
| 1679 | warning (OPT_Wformat, "spurious trailing %<%%%> in format"); |
| 1680 | continue; |
| 1681 | } |
| 1682 | if (*format_chars == '%') |
| 1683 | { |
| 1684 | ++format_chars; |
| 1685 | continue; |
| 1686 | } |
| 1687 | flag_chars[0] = 0; |
| 1688 | |
| 1689 | if ((fki->flags & (int) FMT_FLAG_USE_DOLLAR) && has_operand_number != 0) |
| 1690 | { |
| 1691 | /* Possibly read a $ operand number at the start of the format. |
| 1692 | If one was previously used, one is required here. If one |
| 1693 | is not used here, we can't immediately conclude this is a |
| 1694 | format without them, since it could be printf %m or scanf %*. */ |
| 1695 | int opnum; |
| 1696 | opnum = maybe_read_dollar_number (&format_chars, 0, |
| 1697 | first_fillin_param, |
| 1698 | &main_arg_params, fki); |
| 1699 | if (opnum == -1) |
| 1700 | return; |
| 1701 | else if (opnum > 0) |
| 1702 | { |
| 1703 | has_operand_number = 1; |
| 1704 | main_arg_num = opnum + info->first_arg_num - 1; |
| 1705 | } |
| 1706 | } |
| 1707 | else if (fki->flags & FMT_FLAG_USE_DOLLAR) |
| 1708 | { |
| 1709 | if (avoid_dollar_number (format_chars)) |
| 1710 | return; |
| 1711 | } |
| 1712 | |
| 1713 | /* Read any format flags, but do not yet validate them beyond removing |
| 1714 | duplicates, since in general validation depends on the rest of |
| 1715 | the format. */ |
| 1716 | while (*format_chars != 0 |
| 1717 | && strchr (fki->flag_chars, *format_chars) != 0) |
| 1718 | { |
| 1719 | const format_flag_spec *s = get_flag_spec (flag_specs, |
| 1720 | *format_chars, NULL); |
| 1721 | if (strchr (flag_chars, *format_chars) != 0) |
| 1722 | { |
| 1723 | warning (OPT_Wformat, "repeated %s in format", _(s->name)); |
| 1724 | } |
| 1725 | else |
| 1726 | { |
| 1727 | i = strlen (flag_chars); |
| 1728 | flag_chars[i++] = *format_chars; |
| 1729 | flag_chars[i] = 0; |
| 1730 | } |
| 1731 | if (s->skip_next_char) |
| 1732 | { |
| 1733 | ++format_chars; |
| 1734 | if (*format_chars == 0) |
| 1735 | { |
| 1736 | warning (OPT_Wformat, "missing fill character at end of strfmon format"); |
| 1737 | return; |
| 1738 | } |
| 1739 | } |
| 1740 | ++format_chars; |
| 1741 | } |
| 1742 | |
| 1743 | /* Read any format width, possibly * or *m$. */ |
| 1744 | if (fki->width_char != 0) |
| 1745 | { |
| 1746 | if (fki->width_type != NULL && *format_chars == '*') |
| 1747 | { |
| 1748 | i = strlen (flag_chars); |
| 1749 | flag_chars[i++] = fki->width_char; |
| 1750 | flag_chars[i] = 0; |
| 1751 | /* "...a field width...may be indicated by an asterisk. |
| 1752 | In this case, an int argument supplies the field width..." */ |
| 1753 | ++format_chars; |
| 1754 | if (has_operand_number != 0) |
| 1755 | { |
| 1756 | int opnum; |
| 1757 | opnum = maybe_read_dollar_number (&format_chars, |
| 1758 | has_operand_number == 1, |
| 1759 | first_fillin_param, |
| 1760 | ¶ms, fki); |
| 1761 | if (opnum == -1) |
| 1762 | return; |
| 1763 | else if (opnum > 0) |
| 1764 | { |
| 1765 | has_operand_number = 1; |
| 1766 | arg_num = opnum + info->first_arg_num - 1; |
| 1767 | } |
| 1768 | else |
| 1769 | has_operand_number = 0; |
| 1770 | } |
| 1771 | else |
| 1772 | { |
| 1773 | if (avoid_dollar_number (format_chars)) |
| 1774 | return; |
| 1775 | } |
| 1776 | if (info->first_arg_num != 0) |
| 1777 | { |
| 1778 | if (params == 0) |
| 1779 | cur_param = NULL; |
| 1780 | else |
| 1781 | { |
| 1782 | cur_param = TREE_VALUE (params); |
| 1783 | if (has_operand_number <= 0) |
| 1784 | { |
| 1785 | params = TREE_CHAIN (params); |
| 1786 | ++arg_num; |
| 1787 | } |
| 1788 | } |
| 1789 | width_wanted_type.wanted_type = *fki->width_type; |
| 1790 | width_wanted_type.wanted_type_name = NULL; |
| 1791 | width_wanted_type.pointer_count = 0; |
| 1792 | width_wanted_type.char_lenient_flag = 0; |
| 1793 | width_wanted_type.scalar_identity_flag = 0; |
| 1794 | width_wanted_type.writing_in_flag = 0; |
| 1795 | width_wanted_type.reading_from_flag = 0; |
| 1796 | width_wanted_type.kind = CF_KIND_FIELD_WIDTH; |
| 1797 | width_wanted_type.format_start = format_chars - 1; |
| 1798 | width_wanted_type.format_length = 1; |
| 1799 | width_wanted_type.param = cur_param; |
| 1800 | width_wanted_type.arg_num = arg_num; |
| 1801 | width_wanted_type.next = NULL; |
| 1802 | if (last_wanted_type != 0) |
| 1803 | last_wanted_type->next = &width_wanted_type; |
| 1804 | if (first_wanted_type == 0) |
| 1805 | first_wanted_type = &width_wanted_type; |
| 1806 | last_wanted_type = &width_wanted_type; |
| 1807 | } |
| 1808 | } |
| 1809 | else |
| 1810 | { |
| 1811 | /* Possibly read a numeric width. If the width is zero, |
| 1812 | we complain if appropriate. */ |
| 1813 | int non_zero_width_char = FALSE; |
| 1814 | int found_width = FALSE; |
| 1815 | while (ISDIGIT (*format_chars)) |
| 1816 | { |
| 1817 | found_width = TRUE; |
| 1818 | if (*format_chars != '0') |
| 1819 | non_zero_width_char = TRUE; |
| 1820 | ++format_chars; |
| 1821 | } |
| 1822 | if (found_width && !non_zero_width_char && |
| 1823 | (fki->flags & (int) FMT_FLAG_ZERO_WIDTH_BAD)) |
| 1824 | warning (OPT_Wformat, "zero width in %s format", fki->name); |
| 1825 | if (found_width) |
| 1826 | { |
| 1827 | i = strlen (flag_chars); |
| 1828 | flag_chars[i++] = fki->width_char; |
| 1829 | flag_chars[i] = 0; |
| 1830 | } |
| 1831 | } |
| 1832 | } |
| 1833 | |
| 1834 | /* Read any format left precision (must be a number, not *). */ |
| 1835 | if (fki->left_precision_char != 0 && *format_chars == '#') |
| 1836 | { |
| 1837 | ++format_chars; |
| 1838 | i = strlen (flag_chars); |
| 1839 | flag_chars[i++] = fki->left_precision_char; |
| 1840 | flag_chars[i] = 0; |
| 1841 | if (!ISDIGIT (*format_chars)) |
| 1842 | warning (OPT_Wformat, "empty left precision in %s format", fki->name); |
| 1843 | while (ISDIGIT (*format_chars)) |
| 1844 | ++format_chars; |
| 1845 | } |
| 1846 | |
| 1847 | /* Read any format precision, possibly * or *m$. */ |
| 1848 | if (fki->precision_char != 0 && *format_chars == '.') |
| 1849 | { |
| 1850 | ++format_chars; |
| 1851 | i = strlen (flag_chars); |
| 1852 | flag_chars[i++] = fki->precision_char; |
| 1853 | flag_chars[i] = 0; |
| 1854 | if (fki->precision_type != NULL && *format_chars == '*') |
| 1855 | { |
| 1856 | /* "...a...precision...may be indicated by an asterisk. |
| 1857 | In this case, an int argument supplies the...precision." */ |
| 1858 | ++format_chars; |
| 1859 | if (has_operand_number != 0) |
| 1860 | { |
| 1861 | int opnum; |
| 1862 | opnum = maybe_read_dollar_number (&format_chars, |
| 1863 | has_operand_number == 1, |
| 1864 | first_fillin_param, |
| 1865 | ¶ms, fki); |
| 1866 | if (opnum == -1) |
| 1867 | return; |
| 1868 | else if (opnum > 0) |
| 1869 | { |
| 1870 | has_operand_number = 1; |
| 1871 | arg_num = opnum + info->first_arg_num - 1; |
| 1872 | } |
| 1873 | else |
| 1874 | has_operand_number = 0; |
| 1875 | } |
| 1876 | else |
| 1877 | { |
| 1878 | if (avoid_dollar_number (format_chars)) |
| 1879 | return; |
| 1880 | } |
| 1881 | if (info->first_arg_num != 0) |
| 1882 | { |
| 1883 | if (params == 0) |
| 1884 | cur_param = NULL; |
| 1885 | else |
| 1886 | { |
| 1887 | cur_param = TREE_VALUE (params); |
| 1888 | if (has_operand_number <= 0) |
| 1889 | { |
| 1890 | params = TREE_CHAIN (params); |
| 1891 | ++arg_num; |
| 1892 | } |
| 1893 | } |
| 1894 | precision_wanted_type.wanted_type = *fki->precision_type; |
| 1895 | precision_wanted_type.wanted_type_name = NULL; |
| 1896 | precision_wanted_type.pointer_count = 0; |
| 1897 | precision_wanted_type.char_lenient_flag = 0; |
| 1898 | precision_wanted_type.scalar_identity_flag = 0; |
| 1899 | precision_wanted_type.writing_in_flag = 0; |
| 1900 | precision_wanted_type.reading_from_flag = 0; |
| 1901 | precision_wanted_type.kind = CF_KIND_FIELD_PRECISION; |
| 1902 | precision_wanted_type.param = cur_param; |
| 1903 | precision_wanted_type.format_start = format_chars - 2; |
| 1904 | precision_wanted_type.format_length = 2; |
| 1905 | precision_wanted_type.arg_num = arg_num; |
| 1906 | precision_wanted_type.next = NULL; |
| 1907 | if (last_wanted_type != 0) |
| 1908 | last_wanted_type->next = &precision_wanted_type; |
| 1909 | if (first_wanted_type == 0) |
| 1910 | first_wanted_type = &precision_wanted_type; |
| 1911 | last_wanted_type = &precision_wanted_type; |
| 1912 | } |
| 1913 | } |
| 1914 | else |
| 1915 | { |
| 1916 | if (!(fki->flags & (int) FMT_FLAG_EMPTY_PREC_OK) |
| 1917 | && !ISDIGIT (*format_chars)) |
| 1918 | warning (OPT_Wformat, "empty precision in %s format", fki->name); |
| 1919 | while (ISDIGIT (*format_chars)) |
| 1920 | ++format_chars; |
| 1921 | } |
| 1922 | } |
| 1923 | |
| 1924 | format_start = format_chars; |
| 1925 | if (fki->alloc_char && fki->alloc_char == *format_chars) |
| 1926 | { |
| 1927 | i = strlen (flag_chars); |
| 1928 | flag_chars[i++] = fki->alloc_char; |
| 1929 | flag_chars[i] = 0; |
| 1930 | format_chars++; |
| 1931 | } |
| 1932 | |
| 1933 | /* Handle the scanf allocation kludge. */ |
| 1934 | if (fki->flags & (int) FMT_FLAG_SCANF_A_KLUDGE) |
| 1935 | { |
| 1936 | if (*format_chars == 'a' && !flag_isoc99) |
| 1937 | { |
| 1938 | if (format_chars[1] == 's' || format_chars[1] == 'S' |
| 1939 | || format_chars[1] == '[') |
| 1940 | { |
| 1941 | /* 'a' is used as a flag. */ |
| 1942 | i = strlen (flag_chars); |
| 1943 | flag_chars[i++] = 'a'; |
| 1944 | flag_chars[i] = 0; |
| 1945 | format_chars++; |
| 1946 | } |
| 1947 | } |
| 1948 | } |
| 1949 | |
| 1950 | /* Read any length modifier, if this kind of format has them. */ |
| 1951 | fli = fki->length_char_specs; |
| 1952 | length_chars = NULL; |
| 1953 | length_chars_val = FMT_LEN_none; |
| 1954 | length_chars_std = STD_C89; |
| 1955 | scalar_identity_flag = 0; |
| 1956 | if (fli) |
| 1957 | { |
| 1958 | while (fli->name != 0 |
| 1959 | && strncmp (fli->name, format_chars, strlen (fli->name))) |
| 1960 | fli++; |
| 1961 | /* |
| 1962 | * DragonFly's D conversion needs to have precedence |
| 1963 | * over the DD length modifier |
| 1964 | */ |
| 1965 | if (fli->index == FMT_LEN_D |
| 1966 | && fki->conversion_specs == print_char_table) |
| 1967 | while (fli->name != 0) |
| 1968 | fli++; |
| 1969 | if (fli->name != 0) |
| 1970 | { |
| 1971 | format_chars += strlen (fli->name); |
| 1972 | if (fli->double_name != 0 && fli->name[0] == *format_chars) |
| 1973 | { |
| 1974 | format_chars++; |
| 1975 | length_chars = fli->double_name; |
| 1976 | length_chars_val = fli->double_index; |
| 1977 | length_chars_std = fli->double_std; |
| 1978 | } |
| 1979 | else |
| 1980 | { |
| 1981 | length_chars = fli->name; |
| 1982 | length_chars_val = fli->index; |
| 1983 | length_chars_std = fli->std; |
| 1984 | scalar_identity_flag = fli->scalar_identity_flag; |
| 1985 | } |
| 1986 | i = strlen (flag_chars); |
| 1987 | flag_chars[i++] = fki->length_code_char; |
| 1988 | flag_chars[i] = 0; |
| 1989 | } |
| 1990 | if (pedantic) |
| 1991 | { |
| 1992 | /* Warn if the length modifier is non-standard. */ |
| 1993 | if (ADJ_STD (length_chars_std) > C_STD_VER) |
| 1994 | warning (OPT_Wformat, |
| 1995 | "%s does not support the %qs %s length modifier", |
| 1996 | C_STD_NAME (length_chars_std), length_chars, |
| 1997 | fki->name); |
| 1998 | } |
| 1999 | } |
| 2000 | |
| 2001 | /* Read any modifier (strftime E/O). */ |
| 2002 | if (fki->modifier_chars != NULL) |
| 2003 | { |
| 2004 | while (*format_chars != 0 |
| 2005 | && strchr (fki->modifier_chars, *format_chars) != 0) |
| 2006 | { |
| 2007 | if (strchr (flag_chars, *format_chars) != 0) |
| 2008 | { |
| 2009 | const format_flag_spec *s = get_flag_spec (flag_specs, |
| 2010 | *format_chars, NULL); |
| 2011 | warning (OPT_Wformat, "repeated %s in format", _(s->name)); |
| 2012 | } |
| 2013 | else |
| 2014 | { |
| 2015 | i = strlen (flag_chars); |
| 2016 | flag_chars[i++] = *format_chars; |
| 2017 | flag_chars[i] = 0; |
| 2018 | } |
| 2019 | ++format_chars; |
| 2020 | } |
| 2021 | } |
| 2022 | |
| 2023 | format_char = *format_chars; |
| 2024 | if (format_char == 0 |
| 2025 | || (!(fki->flags & (int) FMT_FLAG_FANCY_PERCENT_OK) |
| 2026 | && format_char == '%')) |
| 2027 | { |
| 2028 | warning (OPT_Wformat, "conversion lacks type at end of format"); |
| 2029 | continue; |
| 2030 | } |
| 2031 | format_chars++; |
| 2032 | fci = fki->conversion_specs; |
| 2033 | while (fci->format_chars != 0 |
| 2034 | && strchr (fci->format_chars, format_char) == 0) |
| 2035 | ++fci; |
| 2036 | if (fci->format_chars == 0) |
| 2037 | { |
| 2038 | if (ISGRAPH (format_char)) |
| 2039 | warning (OPT_Wformat, "unknown conversion type character %qc in format", |
| 2040 | format_char); |
| 2041 | else |
| 2042 | warning (OPT_Wformat, "unknown conversion type character 0x%x in format", |
| 2043 | format_char); |
| 2044 | continue; |
| 2045 | } |
| 2046 | if (pedantic) |
| 2047 | { |
| 2048 | if (ADJ_STD (fci->std) > C_STD_VER) |
| 2049 | warning (OPT_Wformat, "%s does not support the %<%%%c%> %s format", |
| 2050 | C_STD_NAME (fci->std), format_char, fki->name); |
| 2051 | } |
| 2052 | |
| 2053 | /* Validate the individual flags used, removing any that are invalid. */ |
| 2054 | { |
| 2055 | int d = 0; |
| 2056 | for (i = 0; flag_chars[i] != 0; i++) |
| 2057 | { |
| 2058 | const format_flag_spec *s = get_flag_spec (flag_specs, |
| 2059 | flag_chars[i], NULL); |
| 2060 | flag_chars[i - d] = flag_chars[i]; |
| 2061 | if (flag_chars[i] == fki->length_code_char) |
| 2062 | continue; |
| 2063 | if (strchr (fci->flag_chars, flag_chars[i]) == 0) |
| 2064 | { |
| 2065 | warning (OPT_Wformat, "%s used with %<%%%c%> %s format", |
| 2066 | _(s->name), format_char, fki->name); |
| 2067 | d++; |
| 2068 | continue; |
| 2069 | } |
| 2070 | if (pedantic) |
| 2071 | { |
| 2072 | const format_flag_spec *t; |
| 2073 | if (ADJ_STD (s->std) > C_STD_VER) |
| 2074 | warning (OPT_Wformat, "%s does not support %s", |
| 2075 | C_STD_NAME (s->std), _(s->long_name)); |
| 2076 | t = get_flag_spec (flag_specs, flag_chars[i], fci->flags2); |
| 2077 | if (t != NULL && ADJ_STD (t->std) > ADJ_STD (s->std)) |
| 2078 | { |
| 2079 | const char *long_name = (t->long_name != NULL |
| 2080 | ? t->long_name |
| 2081 | : s->long_name); |
| 2082 | if (ADJ_STD (t->std) > C_STD_VER) |
| 2083 | warning (OPT_Wformat, |
| 2084 | "%s does not support %s with the %<%%%c%> %s format", |
| 2085 | C_STD_NAME (t->std), _(long_name), |
| 2086 | format_char, fki->name); |
| 2087 | } |
| 2088 | } |
| 2089 | } |
| 2090 | flag_chars[i - d] = 0; |
| 2091 | } |
| 2092 | |
| 2093 | if ((fki->flags & (int) FMT_FLAG_SCANF_A_KLUDGE) |
| 2094 | && strchr (flag_chars, 'a') != 0) |
| 2095 | alloc_flag = 1; |
| 2096 | if (fki->alloc_char && strchr (flag_chars, fki->alloc_char) != 0) |
| 2097 | alloc_flag = 1; |
| 2098 | |
| 2099 | if (fki->suppression_char |
| 2100 | && strchr (flag_chars, fki->suppression_char) != 0) |
| 2101 | suppressed = 1; |
| 2102 | |
| 2103 | /* Validate the pairs of flags used. */ |
| 2104 | for (i = 0; bad_flag_pairs[i].flag_char1 != 0; i++) |
| 2105 | { |
| 2106 | const format_flag_spec *s, *t; |
| 2107 | if (strchr (flag_chars, bad_flag_pairs[i].flag_char1) == 0) |
| 2108 | continue; |
| 2109 | if (strchr (flag_chars, bad_flag_pairs[i].flag_char2) == 0) |
| 2110 | continue; |
| 2111 | if (bad_flag_pairs[i].predicate != 0 |
| 2112 | && strchr (fci->flags2, bad_flag_pairs[i].predicate) == 0) |
| 2113 | continue; |
| 2114 | s = get_flag_spec (flag_specs, bad_flag_pairs[i].flag_char1, NULL); |
| 2115 | t = get_flag_spec (flag_specs, bad_flag_pairs[i].flag_char2, NULL); |
| 2116 | if (bad_flag_pairs[i].ignored) |
| 2117 | { |
| 2118 | if (bad_flag_pairs[i].predicate != 0) |
| 2119 | warning (OPT_Wformat, |
| 2120 | "%s ignored with %s and %<%%%c%> %s format", |
| 2121 | _(s->name), _(t->name), format_char, |
| 2122 | fki->name); |
| 2123 | else |
| 2124 | warning (OPT_Wformat, "%s ignored with %s in %s format", |
| 2125 | _(s->name), _(t->name), fki->name); |
| 2126 | } |
| 2127 | else |
| 2128 | { |
| 2129 | if (bad_flag_pairs[i].predicate != 0) |
| 2130 | warning (OPT_Wformat, |
| 2131 | "use of %s and %s together with %<%%%c%> %s format", |
| 2132 | _(s->name), _(t->name), format_char, |
| 2133 | fki->name); |
| 2134 | else |
| 2135 | warning (OPT_Wformat, "use of %s and %s together in %s format", |
| 2136 | _(s->name), _(t->name), fki->name); |
| 2137 | } |
| 2138 | } |
| 2139 | |
| 2140 | /* Give Y2K warnings. */ |
| 2141 | if (warn_format_y2k) |
| 2142 | { |
| 2143 | int y2k_level = 0; |
| 2144 | if (strchr (fci->flags2, '4') != 0) |
| 2145 | if (strchr (flag_chars, 'E') != 0) |
| 2146 | y2k_level = 3; |
| 2147 | else |
| 2148 | y2k_level = 2; |
| 2149 | else if (strchr (fci->flags2, '3') != 0) |
| 2150 | y2k_level = 3; |
| 2151 | else if (strchr (fci->flags2, '2') != 0) |
| 2152 | y2k_level = 2; |
| 2153 | if (y2k_level == 3) |
| 2154 | warning (OPT_Wformat_y2k, "%<%%%c%> yields only last 2 digits of " |
| 2155 | "year in some locales", format_char); |
| 2156 | else if (y2k_level == 2) |
| 2157 | warning (OPT_Wformat_y2k, "%<%%%c%> yields only last 2 digits of " |
| 2158 | "year", format_char); |
| 2159 | } |
| 2160 | |
| 2161 | if (strchr (fci->flags2, '[') != 0) |
| 2162 | { |
| 2163 | /* Skip over scan set, in case it happens to have '%' in it. */ |
| 2164 | if (*format_chars == '^') |
| 2165 | ++format_chars; |
| 2166 | /* Find closing bracket; if one is hit immediately, then |
| 2167 | it's part of the scan set rather than a terminator. */ |
| 2168 | if (*format_chars == ']') |
| 2169 | ++format_chars; |
| 2170 | while (*format_chars && *format_chars != ']') |
| 2171 | ++format_chars; |
| 2172 | if (*format_chars != ']') |
| 2173 | /* The end of the format string was reached. */ |
| 2174 | warning (OPT_Wformat, "no closing %<]%> for %<%%[%> format"); |
| 2175 | } |
| 2176 | |
| 2177 | wanted_type = 0; |
| 2178 | wanted_type_name = 0; |
| 2179 | if (fki->flags & (int) FMT_FLAG_ARG_CONVERT) |
| 2180 | { |
| 2181 | wanted_type = (fci->types[length_chars_val].type |
| 2182 | ? *fci->types[length_chars_val].type : 0); |
| 2183 | wanted_type_name = fci->types[length_chars_val].name; |
| 2184 | wanted_type_std = fci->types[length_chars_val].std; |
| 2185 | if (wanted_type == 0) |
| 2186 | { |
| 2187 | warning (OPT_Wformat, |
| 2188 | "use of %qs length modifier with %qc type character", |
| 2189 | length_chars, format_char); |
| 2190 | /* Heuristic: skip one argument when an invalid length/type |
| 2191 | combination is encountered. */ |
| 2192 | arg_num++; |
| 2193 | if (params != 0) |
| 2194 | params = TREE_CHAIN (params); |
| 2195 | continue; |
| 2196 | } |
| 2197 | else if (pedantic |
| 2198 | /* Warn if non-standard, provided it is more non-standard |
| 2199 | than the length and type characters that may already |
| 2200 | have been warned for. */ |
| 2201 | && ADJ_STD (wanted_type_std) > ADJ_STD (length_chars_std) |
| 2202 | && ADJ_STD (wanted_type_std) > ADJ_STD (fci->std)) |
| 2203 | { |
| 2204 | if (ADJ_STD (wanted_type_std) > C_STD_VER) |
| 2205 | warning (OPT_Wformat, |
| 2206 | "%s does not support the %<%%%s%c%> %s format", |
| 2207 | C_STD_NAME (wanted_type_std), length_chars, |
| 2208 | format_char, fki->name); |
| 2209 | } |
| 2210 | } |
| 2211 | |
| 2212 | main_wanted_type.next = NULL; |
| 2213 | |
| 2214 | /* Finally. . .check type of argument against desired type! */ |
| 2215 | if (info->first_arg_num == 0) |
| 2216 | continue; |
| 2217 | if ((fci->pointer_count == 0 && wanted_type == void_type_node) |
| 2218 | || suppressed) |
| 2219 | { |
| 2220 | if (main_arg_num != 0) |
| 2221 | { |
| 2222 | if (suppressed) |
| 2223 | warning (OPT_Wformat, "operand number specified with " |
| 2224 | "suppressed assignment"); |
| 2225 | else |
| 2226 | warning (OPT_Wformat, "operand number specified for format " |
| 2227 | "taking no argument"); |
| 2228 | } |
| 2229 | } |
| 2230 | else |
| 2231 | { |
| 2232 | format_wanted_type *wanted_type_ptr; |
| 2233 | |
| 2234 | if (main_arg_num != 0) |
| 2235 | { |
| 2236 | arg_num = main_arg_num; |
| 2237 | params = main_arg_params; |
| 2238 | } |
| 2239 | else |
| 2240 | { |
| 2241 | ++arg_num; |
| 2242 | if (has_operand_number > 0) |
| 2243 | { |
| 2244 | warning (OPT_Wformat, "missing $ operand number in format"); |
| 2245 | return; |
| 2246 | } |
| 2247 | else |
| 2248 | has_operand_number = 0; |
| 2249 | } |
| 2250 | |
| 2251 | wanted_type_ptr = &main_wanted_type; |
| 2252 | while (fci) |
| 2253 | { |
| 2254 | if (params == 0) |
| 2255 | cur_param = NULL; |
| 2256 | else |
| 2257 | { |
| 2258 | cur_param = TREE_VALUE (params); |
| 2259 | params = TREE_CHAIN (params); |
| 2260 | } |
| 2261 | |
| 2262 | wanted_type_ptr->wanted_type = wanted_type; |
| 2263 | wanted_type_ptr->wanted_type_name = wanted_type_name; |
| 2264 | wanted_type_ptr->pointer_count = fci->pointer_count + alloc_flag; |
| 2265 | wanted_type_ptr->char_lenient_flag = 0; |
| 2266 | if (strchr (fci->flags2, 'c') != 0) |
| 2267 | wanted_type_ptr->char_lenient_flag = 1; |
| 2268 | wanted_type_ptr->scalar_identity_flag = 0; |
| 2269 | if (scalar_identity_flag) |
| 2270 | wanted_type_ptr->scalar_identity_flag = 1; |
| 2271 | wanted_type_ptr->writing_in_flag = 0; |
| 2272 | wanted_type_ptr->reading_from_flag = 0; |
| 2273 | if (alloc_flag) |
| 2274 | wanted_type_ptr->writing_in_flag = 1; |
| 2275 | else |
| 2276 | { |
| 2277 | if (strchr (fci->flags2, 'W') != 0) |
| 2278 | wanted_type_ptr->writing_in_flag = 1; |
| 2279 | if (strchr (fci->flags2, 'R') != 0) |
| 2280 | wanted_type_ptr->reading_from_flag = 1; |
| 2281 | } |
| 2282 | wanted_type_ptr->kind = CF_KIND_FORMAT; |
| 2283 | wanted_type_ptr->param = cur_param; |
| 2284 | wanted_type_ptr->arg_num = arg_num; |
| 2285 | wanted_type_ptr->format_start = format_start; |
| 2286 | wanted_type_ptr->format_length = format_chars - format_start; |
| 2287 | wanted_type_ptr->next = NULL; |
| 2288 | if (last_wanted_type != 0) |
| 2289 | last_wanted_type->next = wanted_type_ptr; |
| 2290 | if (first_wanted_type == 0) |
| 2291 | first_wanted_type = wanted_type_ptr; |
| 2292 | last_wanted_type = wanted_type_ptr; |
| 2293 | |
| 2294 | fci = fci->chain; |
| 2295 | if (fci) |
| 2296 | { |
| 2297 | wanted_type_ptr = (format_wanted_type *) |
| 2298 | pool_alloc (fwt_pool); |
| 2299 | arg_num++; |
| 2300 | wanted_type = *fci->types[length_chars_val].type; |
| 2301 | wanted_type_name = fci->types[length_chars_val].name; |
| 2302 | } |
| 2303 | } |
| 2304 | } |
| 2305 | |
| 2306 | if (first_wanted_type != 0) |
| 2307 | check_format_types (first_wanted_type); |
| 2308 | } |
| 2309 | |
| 2310 | if (format_chars - orig_format_chars != format_length) |
| 2311 | warning (OPT_Wformat_contains_nul, "embedded %<\\0%> in format"); |
| 2312 | if (info->first_arg_num != 0 && params != 0 |
| 2313 | && has_operand_number <= 0) |
| 2314 | { |
| 2315 | res->number_other--; |
| 2316 | res->number_extra_args++; |
| 2317 | } |
| 2318 | if (has_operand_number > 0) |
| 2319 | finish_dollar_format_checking (res, fki->flags & (int) FMT_FLAG_DOLLAR_GAP_POINTER_OK); |
| 2320 | } |
| 2321 | |
| 2322 | |
| 2323 | /* Check the argument types from a single format conversion (possibly |
| 2324 | including width and precision arguments). */ |
| 2325 | static void |
| 2326 | check_format_types (format_wanted_type *types) |
| 2327 | { |
| 2328 | for (; types != 0; types = types->next) |
| 2329 | { |
| 2330 | tree cur_param; |
| 2331 | tree cur_type; |
| 2332 | tree orig_cur_type; |
| 2333 | tree wanted_type; |
| 2334 | int arg_num; |
| 2335 | int i; |
| 2336 | int char_type_flag; |
| 2337 | |
| 2338 | wanted_type = types->wanted_type; |
| 2339 | arg_num = types->arg_num; |
| 2340 | |
| 2341 | /* The following should not occur here. */ |
| 2342 | gcc_assert (wanted_type); |
| 2343 | gcc_assert (wanted_type != void_type_node || types->pointer_count); |
| 2344 | |
| 2345 | if (types->pointer_count == 0) |
| 2346 | wanted_type = lang_hooks.types.type_promotes_to (wanted_type); |
| 2347 | |
| 2348 | wanted_type = TYPE_MAIN_VARIANT (wanted_type); |
| 2349 | |
| 2350 | cur_param = types->param; |
| 2351 | if (!cur_param) |
| 2352 | { |
| 2353 | format_type_warning (types, wanted_type, NULL); |
| 2354 | continue; |
| 2355 | } |
| 2356 | |
| 2357 | cur_type = TREE_TYPE (cur_param); |
| 2358 | if (cur_type == error_mark_node) |
| 2359 | continue; |
| 2360 | orig_cur_type = cur_type; |
| 2361 | char_type_flag = 0; |
| 2362 | |
| 2363 | STRIP_NOPS (cur_param); |
| 2364 | |
| 2365 | /* Check the types of any additional pointer arguments |
| 2366 | that precede the "real" argument. */ |
| 2367 | for (i = 0; i < types->pointer_count; ++i) |
| 2368 | { |
| 2369 | if (TREE_CODE (cur_type) == POINTER_TYPE) |
| 2370 | { |
| 2371 | cur_type = TREE_TYPE (cur_type); |
| 2372 | if (cur_type == error_mark_node) |
| 2373 | break; |
| 2374 | |
| 2375 | /* Check for writing through a NULL pointer. */ |
| 2376 | if (types->writing_in_flag |
| 2377 | && i == 0 |
| 2378 | && cur_param != 0 |
| 2379 | && integer_zerop (cur_param)) |
| 2380 | warning (OPT_Wformat, "writing through null pointer " |
| 2381 | "(argument %d)", arg_num); |
| 2382 | |
| 2383 | /* Check for reading through a NULL pointer. */ |
| 2384 | if (types->reading_from_flag |
| 2385 | && i == 0 |
| 2386 | && cur_param != 0 |
| 2387 | && integer_zerop (cur_param)) |
| 2388 | warning (OPT_Wformat, "reading through null pointer " |
| 2389 | "(argument %d)", arg_num); |
| 2390 | |
| 2391 | if (cur_param != 0 && TREE_CODE (cur_param) == ADDR_EXPR) |
| 2392 | cur_param = TREE_OPERAND (cur_param, 0); |
| 2393 | else |
| 2394 | cur_param = 0; |
| 2395 | |
| 2396 | /* See if this is an attempt to write into a const type with |
| 2397 | scanf or with printf "%n". Note: the writing in happens |
| 2398 | at the first indirection only, if for example |
| 2399 | void * const * is passed to scanf %p; passing |
| 2400 | const void ** is simply passing an incompatible type. */ |
| 2401 | if (types->writing_in_flag |
| 2402 | && i == 0 |
| 2403 | && (TYPE_READONLY (cur_type) |
| 2404 | || (cur_param != 0 |
| 2405 | && (CONSTANT_CLASS_P (cur_param) |
| 2406 | || (DECL_P (cur_param) |
| 2407 | && TREE_READONLY (cur_param)))))) |
| 2408 | warning (OPT_Wformat, "writing into constant object " |
| 2409 | "(argument %d)", arg_num); |
| 2410 | |
| 2411 | /* If there are extra type qualifiers beyond the first |
| 2412 | indirection, then this makes the types technically |
| 2413 | incompatible. */ |
| 2414 | if (i > 0 |
| 2415 | && pedantic |
| 2416 | && (TYPE_READONLY (cur_type) |
| 2417 | || TYPE_VOLATILE (cur_type) |
| 2418 | || TYPE_RESTRICT (cur_type))) |
| 2419 | warning (OPT_Wformat, "extra type qualifiers in format " |
| 2420 | "argument (argument %d)", |
| 2421 | arg_num); |
| 2422 | |
| 2423 | } |
| 2424 | else |
| 2425 | { |
| 2426 | format_type_warning (types, wanted_type, orig_cur_type); |
| 2427 | break; |
| 2428 | } |
| 2429 | } |
| 2430 | |
| 2431 | if (i < types->pointer_count) |
| 2432 | continue; |
| 2433 | |
| 2434 | cur_type = TYPE_MAIN_VARIANT (cur_type); |
| 2435 | |
| 2436 | /* Check whether the argument type is a character type. This leniency |
| 2437 | only applies to certain formats, flagged with 'c'. |
| 2438 | */ |
| 2439 | if (types->char_lenient_flag) |
| 2440 | char_type_flag = (cur_type == char_type_node |
| 2441 | || cur_type == signed_char_type_node |
| 2442 | || cur_type == unsigned_char_type_node); |
| 2443 | |
| 2444 | /* Check the type of the "real" argument, if there's a type we want. */ |
| 2445 | if (lang_hooks.types_compatible_p (wanted_type, cur_type)) |
| 2446 | continue; |
| 2447 | /* If we want 'void *', allow any pointer type. |
| 2448 | (Anything else would already have got a warning.) |
| 2449 | With -pedantic, only allow pointers to void and to character |
| 2450 | types. */ |
| 2451 | if (wanted_type == void_type_node |
| 2452 | && (!pedantic || (i == 1 && char_type_flag))) |
| 2453 | continue; |
| 2454 | /* Don't warn about differences merely in signedness, unless |
| 2455 | -pedantic. With -pedantic, warn if the type is a pointer |
| 2456 | target and not a character type, and for character types at |
| 2457 | a second level of indirection. */ |
| 2458 | if (TREE_CODE (wanted_type) == INTEGER_TYPE |
| 2459 | && TREE_CODE (cur_type) == INTEGER_TYPE |
| 2460 | && (!pedantic || i == 0 || (i == 1 && char_type_flag)) |
| 2461 | && (TYPE_UNSIGNED (wanted_type) |
| 2462 | ? wanted_type == c_common_unsigned_type (cur_type) |
| 2463 | : wanted_type == c_common_signed_type (cur_type))) |
| 2464 | continue; |
| 2465 | /* Likewise, "signed char", "unsigned char" and "char" are |
| 2466 | equivalent but the above test won't consider them equivalent. */ |
| 2467 | if (wanted_type == char_type_node |
| 2468 | && (!pedantic || i < 2) |
| 2469 | && char_type_flag) |
| 2470 | continue; |
| 2471 | if (types->scalar_identity_flag |
| 2472 | && (TREE_CODE (cur_type) == TREE_CODE (wanted_type) |
| 2473 | || (INTEGRAL_TYPE_P (cur_type) |
| 2474 | && INTEGRAL_TYPE_P (wanted_type))) |
| 2475 | && TYPE_PRECISION (cur_type) == TYPE_PRECISION (wanted_type)) |
| 2476 | continue; |
| 2477 | /* Now we have a type mismatch. */ |
| 2478 | format_type_warning (types, wanted_type, orig_cur_type); |
| 2479 | } |
| 2480 | } |
| 2481 | |
| 2482 | |
| 2483 | /* Give a warning about a format argument of different type from that |
| 2484 | expected. WANTED_TYPE is the type the argument should have, possibly |
| 2485 | stripped of pointer dereferences. The description (such as "field |
| 2486 | precision"), the placement in the format string, a possibly more |
| 2487 | friendly name of WANTED_TYPE, and the number of pointer dereferences |
| 2488 | are taken from TYPE. ARG_TYPE is the type of the actual argument, |
| 2489 | or NULL if it is missing. */ |
| 2490 | static void |
| 2491 | format_type_warning (format_wanted_type *type, tree wanted_type, tree arg_type) |
| 2492 | { |
| 2493 | int kind = type->kind; |
| 2494 | const char *wanted_type_name = type->wanted_type_name; |
| 2495 | const char *format_start = type->format_start; |
| 2496 | int format_length = type->format_length; |
| 2497 | int pointer_count = type->pointer_count; |
| 2498 | int arg_num = type->arg_num; |
| 2499 | |
| 2500 | char *p; |
| 2501 | /* If ARG_TYPE is a typedef with a misleading name (for example, |
| 2502 | size_t but not the standard size_t expected by printf %zu), avoid |
| 2503 | printing the typedef name. */ |
| 2504 | if (wanted_type_name |
| 2505 | && arg_type |
| 2506 | && TYPE_NAME (arg_type) |
| 2507 | && TREE_CODE (TYPE_NAME (arg_type)) == TYPE_DECL |
| 2508 | && DECL_NAME (TYPE_NAME (arg_type)) |
| 2509 | && !strcmp (wanted_type_name, |
| 2510 | lang_hooks.decl_printable_name (TYPE_NAME (arg_type), 2))) |
| 2511 | arg_type = TYPE_MAIN_VARIANT (arg_type); |
| 2512 | /* The format type and name exclude any '*' for pointers, so those |
| 2513 | must be formatted manually. For all the types we currently have, |
| 2514 | this is adequate, but formats taking pointers to functions or |
| 2515 | arrays would require the full type to be built up in order to |
| 2516 | print it with %T. */ |
| 2517 | p = (char *) alloca (pointer_count + 2); |
| 2518 | if (pointer_count == 0) |
| 2519 | p[0] = 0; |
| 2520 | else if (c_dialect_cxx ()) |
| 2521 | { |
| 2522 | memset (p, '*', pointer_count); |
| 2523 | p[pointer_count] = 0; |
| 2524 | } |
| 2525 | else |
| 2526 | { |
| 2527 | p[0] = ' '; |
| 2528 | memset (p + 1, '*', pointer_count); |
| 2529 | p[pointer_count + 1] = 0; |
| 2530 | } |
| 2531 | |
| 2532 | if (wanted_type_name) |
| 2533 | { |
| 2534 | if (arg_type) |
| 2535 | warning (OPT_Wformat, "%s %<%s%.*s%> expects argument of type %<%s%s%>, " |
| 2536 | "but argument %d has type %qT", |
| 2537 | gettext (kind_descriptions[kind]), |
| 2538 | (kind == CF_KIND_FORMAT ? "%" : ""), |
| 2539 | format_length, format_start, |
| 2540 | wanted_type_name, p, arg_num, arg_type); |
| 2541 | else |
| 2542 | warning (OPT_Wformat, "%s %<%s%.*s%> expects a matching %<%s%s%> argument", |
| 2543 | gettext (kind_descriptions[kind]), |
| 2544 | (kind == CF_KIND_FORMAT ? "%" : ""), |
| 2545 | format_length, format_start, wanted_type_name, p); |
| 2546 | } |
| 2547 | else |
| 2548 | { |
| 2549 | if (arg_type) |
| 2550 | warning (OPT_Wformat, "%s %<%s%.*s%> expects argument of type %<%T%s%>, " |
| 2551 | "but argument %d has type %qT", |
| 2552 | gettext (kind_descriptions[kind]), |
| 2553 | (kind == CF_KIND_FORMAT ? "%" : ""), |
| 2554 | format_length, format_start, |
| 2555 | wanted_type, p, arg_num, arg_type); |
| 2556 | else |
| 2557 | warning (OPT_Wformat, "%s %<%s%.*s%> expects a matching %<%T%s%> argument", |
| 2558 | gettext (kind_descriptions[kind]), |
| 2559 | (kind == CF_KIND_FORMAT ? "%" : ""), |
| 2560 | format_length, format_start, wanted_type, p); |
| 2561 | } |
| 2562 | } |
| 2563 | |
| 2564 | |
| 2565 | /* Given a format_char_info array FCI, and a character C, this function |
| 2566 | returns the index into the conversion_specs where that specifier's |
| 2567 | data is located. The character must exist. */ |
| 2568 | static unsigned int |
| 2569 | find_char_info_specifier_index (const format_char_info *fci, int c) |
| 2570 | { |
| 2571 | unsigned i; |
| 2572 | |
| 2573 | for (i = 0; fci->format_chars; i++, fci++) |
| 2574 | if (strchr (fci->format_chars, c)) |
| 2575 | return i; |
| 2576 | |
| 2577 | /* We shouldn't be looking for a non-existent specifier. */ |
| 2578 | gcc_unreachable (); |
| 2579 | } |
| 2580 | |
| 2581 | /* Given a format_length_info array FLI, and a character C, this |
| 2582 | function returns the index into the conversion_specs where that |
| 2583 | modifier's data is located. The character must exist. */ |
| 2584 | static unsigned int |
| 2585 | find_length_info_modifier_index (const format_length_info *fli, int c) |
| 2586 | { |
| 2587 | unsigned i; |
| 2588 | |
| 2589 | for (i = 0; fli->name; i++, fli++) |
| 2590 | if (strchr (fli->name, c)) |
| 2591 | return i; |
| 2592 | |
| 2593 | /* We shouldn't be looking for a non-existent modifier. */ |
| 2594 | gcc_unreachable (); |
| 2595 | } |
| 2596 | |
| 2597 | /* Determine the type of HOST_WIDE_INT in the code being compiled for |
| 2598 | use in GCC's __asm_fprintf__ custom format attribute. You must |
| 2599 | have set dynamic_format_types before calling this function. */ |
| 2600 | static void |
| 2601 | init_dynamic_asm_fprintf_info (void) |
| 2602 | { |
| 2603 | static tree hwi; |
| 2604 | |
| 2605 | if (!hwi) |
| 2606 | { |
| 2607 | format_length_info *new_asm_fprintf_length_specs; |
| 2608 | unsigned int i; |
| 2609 | |
| 2610 | /* Find the underlying type for HOST_WIDE_INT. For the %w |
| 2611 | length modifier to work, one must have issued: "typedef |
| 2612 | HOST_WIDE_INT __gcc_host_wide_int__;" in one's source code |
| 2613 | prior to using that modifier. */ |
| 2614 | hwi = maybe_get_identifier ("__gcc_host_wide_int__"); |
| 2615 | if (!hwi) |
| 2616 | { |
| 2617 | error ("%<__gcc_host_wide_int__%> is not defined as a type"); |
| 2618 | return; |
| 2619 | } |
| 2620 | hwi = identifier_global_value (hwi); |
| 2621 | if (!hwi || TREE_CODE (hwi) != TYPE_DECL) |
| 2622 | { |
| 2623 | error ("%<__gcc_host_wide_int__%> is not defined as a type"); |
| 2624 | return; |
| 2625 | } |
| 2626 | hwi = DECL_ORIGINAL_TYPE (hwi); |
| 2627 | gcc_assert (hwi); |
| 2628 | if (hwi != long_integer_type_node && hwi != long_long_integer_type_node) |
| 2629 | { |
| 2630 | error ("%<__gcc_host_wide_int__%> is not defined as %<long%>" |
| 2631 | " or %<long long%>"); |
| 2632 | return; |
| 2633 | } |
| 2634 | |
| 2635 | /* Create a new (writable) copy of asm_fprintf_length_specs. */ |
| 2636 | new_asm_fprintf_length_specs = (format_length_info *) |
| 2637 | xmemdup (asm_fprintf_length_specs, |
| 2638 | sizeof (asm_fprintf_length_specs), |
| 2639 | sizeof (asm_fprintf_length_specs)); |
| 2640 | |
| 2641 | /* HOST_WIDE_INT must be one of 'long' or 'long long'. */ |
| 2642 | i = find_length_info_modifier_index (new_asm_fprintf_length_specs, 'w'); |
| 2643 | if (hwi == long_integer_type_node) |
| 2644 | new_asm_fprintf_length_specs[i].index = FMT_LEN_l; |
| 2645 | else if (hwi == long_long_integer_type_node) |
| 2646 | new_asm_fprintf_length_specs[i].index = FMT_LEN_ll; |
| 2647 | else |
| 2648 | gcc_unreachable (); |
| 2649 | |
| 2650 | /* Assign the new data for use. */ |
| 2651 | dynamic_format_types[asm_fprintf_format_type].length_char_specs = |
| 2652 | new_asm_fprintf_length_specs; |
| 2653 | } |
| 2654 | } |
| 2655 | |
| 2656 | /* Determine the type of a "locus" in the code being compiled for use |
| 2657 | in GCC's __gcc_gfc__ custom format attribute. You must have set |
| 2658 | dynamic_format_types before calling this function. */ |
| 2659 | static void |
| 2660 | init_dynamic_gfc_info (void) |
| 2661 | { |
| 2662 | static tree locus; |
| 2663 | |
| 2664 | if (!locus) |
| 2665 | { |
| 2666 | static format_char_info *gfc_fci; |
| 2667 | |
| 2668 | /* For the GCC __gcc_gfc__ custom format specifier to work, one |
| 2669 | must have declared 'locus' prior to using this attribute. If |
| 2670 | we haven't seen this declarations then you shouldn't use the |
| 2671 | specifier requiring that type. */ |
| 2672 | if ((locus = maybe_get_identifier ("locus"))) |
| 2673 | { |
| 2674 | locus = identifier_global_value (locus); |
| 2675 | if (locus) |
| 2676 | { |
| 2677 | if (TREE_CODE (locus) != TYPE_DECL |
| 2678 | || TREE_TYPE (locus) == error_mark_node) |
| 2679 | { |
| 2680 | error ("%<locus%> is not defined as a type"); |
| 2681 | locus = 0; |
| 2682 | } |
| 2683 | else |
| 2684 | locus = TREE_TYPE (locus); |
| 2685 | } |
| 2686 | } |
| 2687 | |
| 2688 | /* Assign the new data for use. */ |
| 2689 | |
| 2690 | /* Handle the __gcc_gfc__ format specifics. */ |
| 2691 | if (!gfc_fci) |
| 2692 | dynamic_format_types[gcc_gfc_format_type].conversion_specs = |
| 2693 | gfc_fci = (format_char_info *) |
| 2694 | xmemdup (gcc_gfc_char_table, |
| 2695 | sizeof (gcc_gfc_char_table), |
| 2696 | sizeof (gcc_gfc_char_table)); |
| 2697 | if (locus) |
| 2698 | { |
| 2699 | const unsigned i = find_char_info_specifier_index (gfc_fci, 'L'); |
| 2700 | gfc_fci[i].types[0].type = &locus; |
| 2701 | gfc_fci[i].pointer_count = 1; |
| 2702 | } |
| 2703 | } |
| 2704 | } |
| 2705 | |
| 2706 | /* Determine the types of "tree" and "location_t" in the code being |
| 2707 | compiled for use in GCC's diagnostic custom format attributes. You |
| 2708 | must have set dynamic_format_types before calling this function. */ |
| 2709 | static void |
| 2710 | init_dynamic_diag_info (void) |
| 2711 | { |
| 2712 | static tree t, loc, hwi; |
| 2713 | |
| 2714 | if (!loc || !t || !hwi) |
| 2715 | { |
| 2716 | static format_char_info *diag_fci, *tdiag_fci, *cdiag_fci, *cxxdiag_fci; |
| 2717 | static format_length_info *diag_ls; |
| 2718 | unsigned int i; |
| 2719 | |
| 2720 | /* For the GCC-diagnostics custom format specifiers to work, one |
| 2721 | must have declared 'tree' and/or 'location_t' prior to using |
| 2722 | those attributes. If we haven't seen these declarations then |
| 2723 | you shouldn't use the specifiers requiring these types. |
| 2724 | However we don't force a hard ICE because we may see only one |
| 2725 | or the other type. */ |
| 2726 | if ((loc = maybe_get_identifier ("location_t"))) |
| 2727 | { |
| 2728 | loc = identifier_global_value (loc); |
| 2729 | if (loc) |
| 2730 | { |
| 2731 | if (TREE_CODE (loc) != TYPE_DECL) |
| 2732 | { |
| 2733 | error ("%<location_t%> is not defined as a type"); |
| 2734 | loc = 0; |
| 2735 | } |
| 2736 | else |
| 2737 | loc = TREE_TYPE (loc); |
| 2738 | } |
| 2739 | } |
| 2740 | |
| 2741 | /* We need to grab the underlying 'union tree_node' so peek into |
| 2742 | an extra type level. */ |
| 2743 | if ((t = maybe_get_identifier ("tree"))) |
| 2744 | { |
| 2745 | t = identifier_global_value (t); |
| 2746 | if (t) |
| 2747 | { |
| 2748 | if (TREE_CODE (t) != TYPE_DECL) |
| 2749 | { |
| 2750 | error ("%<tree%> is not defined as a type"); |
| 2751 | t = 0; |
| 2752 | } |
| 2753 | else if (TREE_CODE (TREE_TYPE (t)) != POINTER_TYPE) |
| 2754 | { |
| 2755 | error ("%<tree%> is not defined as a pointer type"); |
| 2756 | t = 0; |
| 2757 | } |
| 2758 | else |
| 2759 | t = TREE_TYPE (TREE_TYPE (t)); |
| 2760 | } |
| 2761 | } |
| 2762 | |
| 2763 | /* Find the underlying type for HOST_WIDE_INT. For the %w |
| 2764 | length modifier to work, one must have issued: "typedef |
| 2765 | HOST_WIDE_INT __gcc_host_wide_int__;" in one's source code |
| 2766 | prior to using that modifier. */ |
| 2767 | if ((hwi = maybe_get_identifier ("__gcc_host_wide_int__"))) |
| 2768 | { |
| 2769 | hwi = identifier_global_value (hwi); |
| 2770 | if (hwi) |
| 2771 | { |
| 2772 | if (TREE_CODE (hwi) != TYPE_DECL) |
| 2773 | { |
| 2774 | error ("%<__gcc_host_wide_int__%> is not defined as a type"); |
| 2775 | hwi = 0; |
| 2776 | } |
| 2777 | else |
| 2778 | { |
| 2779 | hwi = DECL_ORIGINAL_TYPE (hwi); |
| 2780 | gcc_assert (hwi); |
| 2781 | if (hwi != long_integer_type_node |
| 2782 | && hwi != long_long_integer_type_node) |
| 2783 | { |
| 2784 | error ("%<__gcc_host_wide_int__%> is not defined" |
| 2785 | " as %<long%> or %<long long%>"); |
| 2786 | hwi = 0; |
| 2787 | } |
| 2788 | } |
| 2789 | } |
| 2790 | } |
| 2791 | |
| 2792 | /* Assign the new data for use. */ |
| 2793 | |
| 2794 | /* All the GCC diag formats use the same length specs. */ |
| 2795 | if (!diag_ls) |
| 2796 | dynamic_format_types[gcc_diag_format_type].length_char_specs = |
| 2797 | dynamic_format_types[gcc_tdiag_format_type].length_char_specs = |
| 2798 | dynamic_format_types[gcc_cdiag_format_type].length_char_specs = |
| 2799 | dynamic_format_types[gcc_cxxdiag_format_type].length_char_specs = |
| 2800 | diag_ls = (format_length_info *) |
| 2801 | xmemdup (gcc_diag_length_specs, |
| 2802 | sizeof (gcc_diag_length_specs), |
| 2803 | sizeof (gcc_diag_length_specs)); |
| 2804 | if (hwi) |
| 2805 | { |
| 2806 | /* HOST_WIDE_INT must be one of 'long' or 'long long'. */ |
| 2807 | i = find_length_info_modifier_index (diag_ls, 'w'); |
| 2808 | if (hwi == long_integer_type_node) |
| 2809 | diag_ls[i].index = FMT_LEN_l; |
| 2810 | else if (hwi == long_long_integer_type_node) |
| 2811 | diag_ls[i].index = FMT_LEN_ll; |
| 2812 | else |
| 2813 | gcc_unreachable (); |
| 2814 | } |
| 2815 | |
| 2816 | /* Handle the __gcc_diag__ format specifics. */ |
| 2817 | if (!diag_fci) |
| 2818 | dynamic_format_types[gcc_diag_format_type].conversion_specs = |
| 2819 | diag_fci = (format_char_info *) |
| 2820 | xmemdup (gcc_diag_char_table, |
| 2821 | sizeof (gcc_diag_char_table), |
| 2822 | sizeof (gcc_diag_char_table)); |
| 2823 | if (t) |
| 2824 | { |
| 2825 | i = find_char_info_specifier_index (diag_fci, 'K'); |
| 2826 | diag_fci[i].types[0].type = &t; |
| 2827 | diag_fci[i].pointer_count = 1; |
| 2828 | } |
| 2829 | |
| 2830 | /* Handle the __gcc_tdiag__ format specifics. */ |
| 2831 | if (!tdiag_fci) |
| 2832 | dynamic_format_types[gcc_tdiag_format_type].conversion_specs = |
| 2833 | tdiag_fci = (format_char_info *) |
| 2834 | xmemdup (gcc_tdiag_char_table, |
| 2835 | sizeof (gcc_tdiag_char_table), |
| 2836 | sizeof (gcc_tdiag_char_table)); |
| 2837 | if (t) |
| 2838 | { |
| 2839 | /* All specifiers taking a tree share the same struct. */ |
| 2840 | i = find_char_info_specifier_index (tdiag_fci, 'D'); |
| 2841 | tdiag_fci[i].types[0].type = &t; |
| 2842 | tdiag_fci[i].pointer_count = 1; |
| 2843 | i = find_char_info_specifier_index (tdiag_fci, 'K'); |
| 2844 | tdiag_fci[i].types[0].type = &t; |
| 2845 | tdiag_fci[i].pointer_count = 1; |
| 2846 | } |
| 2847 | |
| 2848 | /* Handle the __gcc_cdiag__ format specifics. */ |
| 2849 | if (!cdiag_fci) |
| 2850 | dynamic_format_types[gcc_cdiag_format_type].conversion_specs = |
| 2851 | cdiag_fci = (format_char_info *) |
| 2852 | xmemdup (gcc_cdiag_char_table, |
| 2853 | sizeof (gcc_cdiag_char_table), |
| 2854 | sizeof (gcc_cdiag_char_table)); |
| 2855 | if (t) |
| 2856 | { |
| 2857 | /* All specifiers taking a tree share the same struct. */ |
| 2858 | i = find_char_info_specifier_index (cdiag_fci, 'D'); |
| 2859 | cdiag_fci[i].types[0].type = &t; |
| 2860 | cdiag_fci[i].pointer_count = 1; |
| 2861 | i = find_char_info_specifier_index (cdiag_fci, 'K'); |
| 2862 | cdiag_fci[i].types[0].type = &t; |
| 2863 | cdiag_fci[i].pointer_count = 1; |
| 2864 | } |
| 2865 | |
| 2866 | /* Handle the __gcc_cxxdiag__ format specifics. */ |
| 2867 | if (!cxxdiag_fci) |
| 2868 | dynamic_format_types[gcc_cxxdiag_format_type].conversion_specs = |
| 2869 | cxxdiag_fci = (format_char_info *) |
| 2870 | xmemdup (gcc_cxxdiag_char_table, |
| 2871 | sizeof (gcc_cxxdiag_char_table), |
| 2872 | sizeof (gcc_cxxdiag_char_table)); |
| 2873 | if (t) |
| 2874 | { |
| 2875 | /* All specifiers taking a tree share the same struct. */ |
| 2876 | i = find_char_info_specifier_index (cxxdiag_fci, 'D'); |
| 2877 | cxxdiag_fci[i].types[0].type = &t; |
| 2878 | cxxdiag_fci[i].pointer_count = 1; |
| 2879 | i = find_char_info_specifier_index (cxxdiag_fci, 'K'); |
| 2880 | cxxdiag_fci[i].types[0].type = &t; |
| 2881 | cxxdiag_fci[i].pointer_count = 1; |
| 2882 | } |
| 2883 | } |
| 2884 | } |
| 2885 | |
| 2886 | #ifdef TARGET_FORMAT_TYPES |
| 2887 | extern const format_kind_info TARGET_FORMAT_TYPES[]; |
| 2888 | #endif |
| 2889 | |
| 2890 | #ifdef TARGET_OVERRIDES_FORMAT_ATTRIBUTES |
| 2891 | extern const target_ovr_attr TARGET_OVERRIDES_FORMAT_ATTRIBUTES[]; |
| 2892 | #endif |
| 2893 | #ifdef TARGET_OVERRIDES_FORMAT_INIT |
| 2894 | extern void TARGET_OVERRIDES_FORMAT_INIT (void); |
| 2895 | #endif |
| 2896 | |
| 2897 | /* Attributes such as "printf" are equivalent to those such as |
| 2898 | "gnu_printf" unless this is overridden by a target. */ |
| 2899 | static const target_ovr_attr gnu_target_overrides_format_attributes[] = |
| 2900 | { |
| 2901 | { "gnu_printf", "printf" }, |
| 2902 | { "gnu_scanf", "scanf" }, |
| 2903 | { "gnu_strftime", "strftime" }, |
| 2904 | { "gnu_strfmon", "strfmon" }, |
| 2905 | { NULL, NULL } |
| 2906 | }; |
| 2907 | |
| 2908 | /* Translate to unified attribute name. This is used in decode_format_type and |
| 2909 | decode_format_attr. In attr_name the user specified argument is passed. It |
| 2910 | returns the unified format name from TARGET_OVERRIDES_FORMAT_ATTRIBUTES |
| 2911 | or the attr_name passed to this function, if there is no matching entry. */ |
| 2912 | static const char * |
| 2913 | convert_format_name_to_system_name (const char *attr_name) |
| 2914 | { |
| 2915 | int i; |
| 2916 | |
| 2917 | if (attr_name == NULL || *attr_name == 0 |
| 2918 | || strncmp (attr_name, "gcc_", 4) == 0) |
| 2919 | return attr_name; |
| 2920 | #ifdef TARGET_OVERRIDES_FORMAT_INIT |
| 2921 | TARGET_OVERRIDES_FORMAT_INIT (); |
| 2922 | #endif |
| 2923 | |
| 2924 | #ifdef TARGET_OVERRIDES_FORMAT_ATTRIBUTES |
| 2925 | /* Check if format attribute is overridden by target. */ |
| 2926 | if (TARGET_OVERRIDES_FORMAT_ATTRIBUTES != NULL |
| 2927 | && TARGET_OVERRIDES_FORMAT_ATTRIBUTES_COUNT > 0) |
| 2928 | { |
| 2929 | for (i = 0; i < TARGET_OVERRIDES_FORMAT_ATTRIBUTES_COUNT; ++i) |
| 2930 | { |
| 2931 | if (cmp_attribs (TARGET_OVERRIDES_FORMAT_ATTRIBUTES[i].named_attr_src, |
| 2932 | attr_name)) |
| 2933 | return attr_name; |
| 2934 | if (cmp_attribs (TARGET_OVERRIDES_FORMAT_ATTRIBUTES[i].named_attr_dst, |
| 2935 | attr_name)) |
| 2936 | return TARGET_OVERRIDES_FORMAT_ATTRIBUTES[i].named_attr_src; |
| 2937 | } |
| 2938 | } |
| 2939 | #endif |
| 2940 | /* Otherwise default to gnu format. */ |
| 2941 | for (i = 0; |
| 2942 | gnu_target_overrides_format_attributes[i].named_attr_src != NULL; |
| 2943 | ++i) |
| 2944 | { |
| 2945 | if (cmp_attribs (gnu_target_overrides_format_attributes[i].named_attr_src, |
| 2946 | attr_name)) |
| 2947 | return attr_name; |
| 2948 | if (cmp_attribs (gnu_target_overrides_format_attributes[i].named_attr_dst, |
| 2949 | attr_name)) |
| 2950 | return gnu_target_overrides_format_attributes[i].named_attr_src; |
| 2951 | } |
| 2952 | |
| 2953 | return attr_name; |
| 2954 | } |
| 2955 | |
| 2956 | /* Return true if TATTR_NAME and ATTR_NAME are the same format attribute, |
| 2957 | counting "name" and "__name__" as the same, false otherwise. */ |
| 2958 | static bool |
| 2959 | cmp_attribs (const char *tattr_name, const char *attr_name) |
| 2960 | { |
| 2961 | int alen = strlen (attr_name); |
| 2962 | int slen = (tattr_name ? strlen (tattr_name) : 0); |
| 2963 | if (alen > 4 && attr_name[0] == '_' && attr_name[1] == '_' |
| 2964 | && attr_name[alen - 1] == '_' && attr_name[alen - 2] == '_') |
| 2965 | { |
| 2966 | attr_name += 2; |
| 2967 | alen -= 4; |
| 2968 | } |
| 2969 | if (alen != slen || strncmp (tattr_name, attr_name, alen) != 0) |
| 2970 | return false; |
| 2971 | return true; |
| 2972 | } |
| 2973 | |
| 2974 | /* Handle a "format" attribute; arguments as in |
| 2975 | struct attribute_spec.handler. */ |
| 2976 | tree |
| 2977 | handle_format_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
| 2978 | int flags, bool *no_add_attrs) |
| 2979 | { |
| 2980 | tree type = *node; |
| 2981 | function_format_info info; |
| 2982 | |
| 2983 | #ifdef TARGET_FORMAT_TYPES |
| 2984 | /* If the target provides additional format types, we need to |
| 2985 | add them to FORMAT_TYPES at first use. */ |
| 2986 | if (TARGET_FORMAT_TYPES != NULL && !dynamic_format_types) |
| 2987 | { |
| 2988 | dynamic_format_types = XNEWVEC (format_kind_info, |
| 2989 | n_format_types + TARGET_N_FORMAT_TYPES); |
| 2990 | memcpy (dynamic_format_types, format_types_orig, |
| 2991 | sizeof (format_types_orig)); |
| 2992 | memcpy (&dynamic_format_types[n_format_types], TARGET_FORMAT_TYPES, |
| 2993 | TARGET_N_FORMAT_TYPES * sizeof (dynamic_format_types[0])); |
| 2994 | |
| 2995 | format_types = dynamic_format_types; |
| 2996 | /* Provide a reference for the first potential external type. */ |
| 2997 | first_target_format_type = n_format_types; |
| 2998 | n_format_types += TARGET_N_FORMAT_TYPES; |
| 2999 | } |
| 3000 | #endif |
| 3001 | |
| 3002 | if (!decode_format_attr (args, &info, 0)) |
| 3003 | { |
| 3004 | *no_add_attrs = true; |
| 3005 | return NULL_TREE; |
| 3006 | } |
| 3007 | |
| 3008 | if (prototype_p (type)) |
| 3009 | { |
| 3010 | if (!check_format_string (type, info.format_num, flags, |
| 3011 | no_add_attrs, info.format_type)) |
| 3012 | return NULL_TREE; |
| 3013 | |
| 3014 | if (info.first_arg_num != 0) |
| 3015 | { |
| 3016 | unsigned HOST_WIDE_INT arg_num = 1; |
| 3017 | function_args_iterator iter; |
| 3018 | tree arg_type; |
| 3019 | |
| 3020 | /* Verify that first_arg_num points to the last arg, |
| 3021 | the ... */ |
| 3022 | FOREACH_FUNCTION_ARGS (type, arg_type, iter) |
| 3023 | arg_num++; |
| 3024 | |
| 3025 | if (arg_num != info.first_arg_num) |
| 3026 | { |
| 3027 | if (!(flags & (int) ATTR_FLAG_BUILT_IN)) |
| 3028 | error ("args to be formatted is not %<...%>"); |
| 3029 | *no_add_attrs = true; |
| 3030 | return NULL_TREE; |
| 3031 | } |
| 3032 | } |
| 3033 | } |
| 3034 | |
| 3035 | /* Check if this is a strftime variant. Just for this variant |
| 3036 | FMT_FLAG_ARG_CONVERT is not set. */ |
| 3037 | if ((format_types[info.format_type].flags & (int) FMT_FLAG_ARG_CONVERT) == 0 |
| 3038 | && info.first_arg_num != 0) |
| 3039 | { |
| 3040 | error ("strftime formats cannot format arguments"); |
| 3041 | *no_add_attrs = true; |
| 3042 | return NULL_TREE; |
| 3043 | } |
| 3044 | |
| 3045 | /* If this is a custom GCC-internal format type, we have to |
| 3046 | initialize certain bits at runtime. */ |
| 3047 | if (info.format_type == asm_fprintf_format_type |
| 3048 | || info.format_type == gcc_gfc_format_type |
| 3049 | || info.format_type == gcc_diag_format_type |
| 3050 | || info.format_type == gcc_tdiag_format_type |
| 3051 | || info.format_type == gcc_cdiag_format_type |
| 3052 | || info.format_type == gcc_cxxdiag_format_type) |
| 3053 | { |
| 3054 | /* Our first time through, we have to make sure that our |
| 3055 | format_type data is allocated dynamically and is modifiable. */ |
| 3056 | if (!dynamic_format_types) |
| 3057 | format_types = dynamic_format_types = (format_kind_info *) |
| 3058 | xmemdup (format_types_orig, sizeof (format_types_orig), |
| 3059 | sizeof (format_types_orig)); |
| 3060 | |
| 3061 | /* If this is format __asm_fprintf__, we have to initialize |
| 3062 | GCC's notion of HOST_WIDE_INT for checking %wd. */ |
| 3063 | if (info.format_type == asm_fprintf_format_type) |
| 3064 | init_dynamic_asm_fprintf_info (); |
| 3065 | /* If this is format __gcc_gfc__, we have to initialize GCC's |
| 3066 | notion of 'locus' at runtime for %L. */ |
| 3067 | else if (info.format_type == gcc_gfc_format_type) |
| 3068 | init_dynamic_gfc_info (); |
| 3069 | /* If this is one of the diagnostic attributes, then we have to |
| 3070 | initialize 'location_t' and 'tree' at runtime. */ |
| 3071 | else if (info.format_type == gcc_diag_format_type |
| 3072 | || info.format_type == gcc_tdiag_format_type |
| 3073 | || info.format_type == gcc_cdiag_format_type |
| 3074 | || info.format_type == gcc_cxxdiag_format_type) |
| 3075 | init_dynamic_diag_info (); |
| 3076 | else |
| 3077 | gcc_unreachable (); |
| 3078 | } |
| 3079 | |
| 3080 | return NULL_TREE; |
| 3081 | } |