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2005-12-16 Jon Grimm <jgrimm2@us.ibm.com>
[thirdparty/gcc.git] / gcc / c-format.c
CommitLineData
0144d886 1/* Check calls to formatted I/O functions (-Wformat).
c53485bb 2 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
c429745f 3 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
0144d886 4
f12b58b3 5This file is part of GCC.
0144d886 6
f12b58b3 7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
0144d886 11
f12b58b3 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15for more details.
0144d886 16
17You should have received a copy of the GNU General Public License
f12b58b3 18along with GCC; see the file COPYING. If not, write to the Free
67ce556b 19Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
2002110-1301, USA. */
0144d886 21
22#include "config.h"
23#include "system.h"
805e22b2 24#include "coretypes.h"
25#include "tm.h"
0144d886 26#include "tree.h"
27#include "flags.h"
0144d886 28#include "c-common.h"
7781aa77 29#include "toplev.h"
0144d886 30#include "intl.h"
31#include "diagnostic.h"
63c62881 32#include "langhooks.h"
1e9af880 33#include "c-format.h"
0144d886 34\f
0144d886 35/* Set format warning options according to a -Wformat=n option. */
36
37void
1cae46be 38set_Wformat (int setting)
0144d886 39{
40 warn_format = setting;
0144d886 41 warn_format_extra_args = setting;
959f435b 42 warn_format_zero_length = setting;
0144d886 43 if (setting != 1)
44 {
45 warn_format_nonliteral = setting;
46 warn_format_security = setting;
af35025e 47 warn_format_y2k = setting;
0144d886 48 }
dbf6c367 49 /* Make sure not to disable -Wnonnull if -Wformat=0 is specified. */
50 if (setting)
51 warn_nonnull = setting;
0144d886 52}
53
54\f
55/* Handle attributes associated with format checking. */
56
1e9af880 57/* This must be in the same order as format_types, except for
58 format_type_error. Target-specific format types do not have
59 matching enum values. */
c54d077b 60enum format_type { printf_format_type, asm_fprintf_format_type,
7781aa77 61 gcc_diag_format_type, gcc_tdiag_format_type,
62 gcc_cdiag_format_type,
bbec950d 63 gcc_cxxdiag_format_type, gcc_gfc_format_type,
c54d077b 64 scanf_format_type, strftime_format_type,
1e9af880 65 strfmon_format_type, format_type_error = -1};
0144d886 66
e9a0f285 67typedef struct function_format_info
68{
1e9af880 69 int format_type; /* type of format (printf, scanf, etc.) */
e9a0f285 70 unsigned HOST_WIDE_INT format_num; /* number of format argument */
71 unsigned HOST_WIDE_INT first_arg_num; /* number of first arg (zero for varargs) */
72} function_format_info;
73
1cae46be 74static bool decode_format_attr (tree, function_format_info *, int);
1e9af880 75static int decode_format_type (const char *);
0144d886 76
0a1f0a0f 77static bool check_format_string (tree argument,
78 unsigned HOST_WIDE_INT format_num,
79 int flags, bool *no_add_attrs);
80static bool get_constant (tree expr, unsigned HOST_WIDE_INT *value,
81 int validated_p);
0144d886 82
83
e9a0f285 84/* Handle a "format_arg" attribute; arguments as in
e3c541f0 85 struct attribute_spec.handler. */
86tree
9a03a746 87handle_format_arg_attribute (tree *node, tree ARG_UNUSED (name),
d19a6ea0 88 tree args, int flags, bool *no_add_attrs)
0144d886 89{
e9a0f285 90 tree type = *node;
0144d886 91 tree format_num_expr = TREE_VALUE (args);
4ee9c684 92 unsigned HOST_WIDE_INT format_num = 0;
0144d886 93 tree argument;
94
0a1f0a0f 95 if (!get_constant (format_num_expr, &format_num, 0))
0144d886 96 {
97 error ("format string has invalid operand number");
e3c541f0 98 *no_add_attrs = true;
99 return NULL_TREE;
0144d886 100 }
101
0144d886 102 argument = TYPE_ARG_TYPES (type);
103 if (argument)
104 {
0a1f0a0f 105 if (!check_format_string (argument, format_num, flags, no_add_attrs))
106 return NULL_TREE;
0144d886 107 }
108
e9a0f285 109 if (TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE
110 || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type)))
0144d886 111 != char_type_node))
112 {
7d3b509a 113 if (!(flags & (int) ATTR_FLAG_BUILT_IN))
114 error ("function does not return string type");
e3c541f0 115 *no_add_attrs = true;
116 return NULL_TREE;
0144d886 117 }
118
e3c541f0 119 return NULL_TREE;
0144d886 120}
121
0a1f0a0f 122/* Verify that the format_num argument is actually a string, in case
123 the format attribute is in error. */
9140e457 124static bool
0a1f0a0f 125check_format_string (tree argument, unsigned HOST_WIDE_INT format_num,
126 int flags, bool *no_add_attrs)
127{
128 unsigned HOST_WIDE_INT i;
129
130 for (i = 1; i != format_num; i++)
131 {
132 if (argument == 0)
133 break;
134 argument = TREE_CHAIN (argument);
135 }
136
137 if (!argument
138 || TREE_CODE (TREE_VALUE (argument)) != POINTER_TYPE
139 || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (argument)))
140 != char_type_node))
141 {
142 if (!(flags & (int) ATTR_FLAG_BUILT_IN))
07e3a3d2 143 error ("format string argument not a string type");
0a1f0a0f 144 *no_add_attrs = true;
145 return false;
146 }
147
148 return true;
149}
150
67409385 151/* Verify EXPR is a constant, and store its value.
89f18f73 152 If validated_p is true there should be no errors.
6473f3f4 153 Returns true on success, false otherwise. */
9140e457 154static bool
231bd014 155get_constant (tree expr, unsigned HOST_WIDE_INT *value, int validated_p)
0a1f0a0f 156{
0a1f0a0f 157 if (TREE_CODE (expr) != INTEGER_CST || TREE_INT_CST_HIGH (expr) != 0)
158 {
231bd014 159 gcc_assert (!validated_p);
0a1f0a0f 160 return false;
161 }
162
163 *value = TREE_INT_CST_LOW (expr);
164
165 return true;
166}
0144d886 167
89f18f73 168/* Decode the arguments to a "format" attribute into a
169 function_format_info structure. It is already known that the list
170 is of the right length. If VALIDATED_P is true, then these
171 attributes have already been validated and must not be erroneous;
172 if false, it will give an error message. Returns true if the
173 attributes are successfully decoded, false otherwise. */
0144d886 174
e9a0f285 175static bool
1cae46be 176decode_format_attr (tree args, function_format_info *info, int validated_p)
0144d886 177{
e9a0f285 178 tree format_type_id = TREE_VALUE (args);
179 tree format_num_expr = TREE_VALUE (TREE_CHAIN (args));
180 tree first_arg_num_expr
181 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (args)));
0144d886 182
e9a0f285 183 if (TREE_CODE (format_type_id) != IDENTIFIER_NODE)
0144d886 184 {
231bd014 185 gcc_assert (!validated_p);
e9a0f285 186 error ("unrecognized format specifier");
187 return false;
0144d886 188 }
e9a0f285 189 else
0144d886 190 {
e9a0f285 191 const char *p = IDENTIFIER_POINTER (format_type_id);
0144d886 192
e9a0f285 193 info->format_type = decode_format_type (p);
0144d886 194
e9a0f285 195 if (info->format_type == format_type_error)
196 {
231bd014 197 gcc_assert (!validated_p);
6bf97f82 198 warning (OPT_Wformat, "%qE is an unrecognized format function type",
782858b8 199 format_type_id);
e9a0f285 200 return false;
201 }
202 }
0144d886 203
0a1f0a0f 204 if (!get_constant (format_num_expr, &info->format_num, validated_p))
0144d886 205 {
e9a0f285 206 error ("format string has invalid operand number");
207 return false;
0144d886 208 }
209
0a1f0a0f 210 if (!get_constant (first_arg_num_expr, &info->first_arg_num, validated_p))
211 {
1e5fcbe2 212 error ("%<...%> has invalid operand number");
0a1f0a0f 213 return false;
214 }
215
e9a0f285 216 if (info->first_arg_num != 0 && info->first_arg_num <= info->format_num)
0144d886 217 {
231bd014 218 gcc_assert (!validated_p);
07e3a3d2 219 error ("format string argument follows the args to be formatted");
e9a0f285 220 return false;
0144d886 221 }
222
e9a0f285 223 return true;
0144d886 224}
0144d886 225\f
226/* Check a call to a format function against a parameter list. */
227
0144d886 228/* The C standard version C++ is treated as equivalent to
229 or inheriting from, for the purpose of format features supported. */
7c2404e1 230#define CPLUSPLUS_STD_VER STD_C94
0144d886 231/* The C standard version we are checking formats against when pedantic. */
84166705 232#define C_STD_VER ((int) (c_dialect_cxx () \
233 ? CPLUSPLUS_STD_VER \
234 : (flag_isoc99 \
235 ? STD_C99 \
0fd4500a 236 : (flag_isoc94 ? STD_C94 : STD_C89))))
0144d886 237/* The name to give to the standard version we are warning about when
238 pedantic. FEATURE_VER is the version in which the feature warned out
239 appeared, which is higher than C_STD_VER. */
c0f19401 240#define C_STD_NAME(FEATURE_VER) (c_dialect_cxx () \
0144d886 241 ? "ISO C++" \
242 : ((FEATURE_VER) == STD_EXT \
243 ? "ISO C" \
ba059ac0 244 : "ISO C90"))
0144d886 245/* Adjust a C standard version, which may be STD_C9L, to account for
246 -Wno-long-long. Returns other standard versions unchanged. */
84166705 247#define ADJ_STD(VER) ((int) ((VER) == STD_C9L \
0144d886 248 ? (warn_long_long ? STD_C99 : STD_C89) \
249 : (VER)))
250
0144d886 251/* Structure describing details of a type expected in format checking,
252 and the type to check against it. */
253typedef struct format_wanted_type
254{
255 /* The type wanted. */
256 tree wanted_type;
257 /* The name of this type to use in diagnostics. */
258 const char *wanted_type_name;
259 /* The level of indirection through pointers at which this type occurs. */
260 int pointer_count;
261 /* Whether, when pointer_count is 1, to allow any character type when
262 pedantic, rather than just the character or void type specified. */
263 int char_lenient_flag;
264 /* Whether the argument, dereferenced once, is written into and so the
265 argument must not be a pointer to a const-qualified type. */
266 int writing_in_flag;
267 /* Whether the argument, dereferenced once, is read from and so
268 must not be a NULL pointer. */
269 int reading_from_flag;
31266980 270 /* If warnings should be of the form "field precision should have
271 type 'int'", the name to use (in this case "field precision"),
272 otherwise NULL, for "format expects type 'long'" type
273 messages. */
0144d886 274 const char *name;
275 /* The actual parameter to check against the wanted type. */
276 tree param;
277 /* The argument number of that parameter. */
278 int arg_num;
279 /* The next type to check for this format conversion, or NULL if none. */
280 struct format_wanted_type *next;
281} format_wanted_type;
282
283
284static const format_length_info printf_length_specs[] =
285{
286 { "h", FMT_LEN_h, STD_C89, "hh", FMT_LEN_hh, STD_C99 },
287 { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C9L },
288 { "q", FMT_LEN_ll, STD_EXT, NULL, 0, 0 },
289 { "L", FMT_LEN_L, STD_C89, NULL, 0, 0 },
290 { "z", FMT_LEN_z, STD_C99, NULL, 0, 0 },
291 { "Z", FMT_LEN_z, STD_EXT, NULL, 0, 0 },
292 { "t", FMT_LEN_t, STD_C99, NULL, 0, 0 },
293 { "j", FMT_LEN_j, STD_C99, NULL, 0, 0 },
c4503c0a 294 { "H", FMT_LEN_H, STD_EXT, NULL, 0, 0 },
295 { "D", FMT_LEN_D, STD_EXT, "DD", FMT_LEN_DD, STD_EXT },
0144d886 296 { NULL, 0, 0, NULL, 0, 0 }
297};
298
c54d077b 299/* Length specifiers valid for asm_fprintf. */
300static const format_length_info asm_fprintf_length_specs[] =
301{
302 { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C89 },
303 { "w", FMT_LEN_none, STD_C89, NULL, 0, 0 },
304 { NULL, 0, 0, NULL, 0, 0 }
305};
0144d886 306
3e038b9d 307/* Length specifiers valid for GCC diagnostics. */
308static const format_length_info gcc_diag_length_specs[] =
309{
310 { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C89 },
311 { "w", FMT_LEN_none, STD_C89, NULL, 0, 0 },
312 { NULL, 0, 0, NULL, 0, 0 }
313};
314
315/* The custom diagnostics all accept the same length specifiers. */
7781aa77 316#define gcc_tdiag_length_specs gcc_diag_length_specs
3e038b9d 317#define gcc_cdiag_length_specs gcc_diag_length_specs
318#define gcc_cxxdiag_length_specs gcc_diag_length_specs
319
0144d886 320/* This differs from printf_length_specs only in that "Z" is not accepted. */
321static const format_length_info scanf_length_specs[] =
322{
323 { "h", FMT_LEN_h, STD_C89, "hh", FMT_LEN_hh, STD_C99 },
324 { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C9L },
325 { "q", FMT_LEN_ll, STD_EXT, NULL, 0, 0 },
326 { "L", FMT_LEN_L, STD_C89, NULL, 0, 0 },
327 { "z", FMT_LEN_z, STD_C99, NULL, 0, 0 },
328 { "t", FMT_LEN_t, STD_C99, NULL, 0, 0 },
329 { "j", FMT_LEN_j, STD_C99, NULL, 0, 0 },
c4503c0a 330 { "H", FMT_LEN_H, STD_EXT, NULL, 0, 0 },
331 { "D", FMT_LEN_D, STD_EXT, "DD", FMT_LEN_DD, STD_EXT },
0144d886 332 { NULL, 0, 0, NULL, 0, 0 }
333};
334
335
336/* All tables for strfmon use STD_C89 everywhere, since -pedantic warnings
337 make no sense for a format type not part of any C standard version. */
338static const format_length_info strfmon_length_specs[] =
339{
340 /* A GNU extension. */
341 { "L", FMT_LEN_L, STD_C89, NULL, 0, 0 },
342 { NULL, 0, 0, NULL, 0, 0 }
343};
344
345static const format_flag_spec printf_flag_specs[] =
346{
eb586f2c 347 { ' ', 0, 0, N_("' ' flag"), N_("the ' ' printf flag"), STD_C89 },
348 { '+', 0, 0, N_("'+' flag"), N_("the '+' printf flag"), STD_C89 },
349 { '#', 0, 0, N_("'#' flag"), N_("the '#' printf flag"), STD_C89 },
350 { '0', 0, 0, N_("'0' flag"), N_("the '0' printf flag"), STD_C89 },
351 { '-', 0, 0, N_("'-' flag"), N_("the '-' printf flag"), STD_C89 },
352 { '\'', 0, 0, N_("''' flag"), N_("the ''' printf flag"), STD_EXT },
353 { 'I', 0, 0, N_("'I' flag"), N_("the 'I' printf flag"), STD_EXT },
0144d886 354 { 'w', 0, 0, N_("field width"), N_("field width in printf format"), STD_C89 },
355 { 'p', 0, 0, N_("precision"), N_("precision in printf format"), STD_C89 },
356 { 'L', 0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 },
357 { 0, 0, 0, NULL, NULL, 0 }
358};
359
360
361static const format_flag_pair printf_flag_pairs[] =
362{
363 { ' ', '+', 1, 0 },
364 { '0', '-', 1, 0 },
365 { '0', 'p', 1, 'i' },
366 { 0, 0, 0, 0 }
367};
368
c54d077b 369static const format_flag_spec asm_fprintf_flag_specs[] =
370{
eb586f2c 371 { ' ', 0, 0, N_("' ' flag"), N_("the ' ' printf flag"), STD_C89 },
372 { '+', 0, 0, N_("'+' flag"), N_("the '+' printf flag"), STD_C89 },
373 { '#', 0, 0, N_("'#' flag"), N_("the '#' printf flag"), STD_C89 },
374 { '0', 0, 0, N_("'0' flag"), N_("the '0' printf flag"), STD_C89 },
375 { '-', 0, 0, N_("'-' flag"), N_("the '-' printf flag"), STD_C89 },
c54d077b 376 { 'w', 0, 0, N_("field width"), N_("field width in printf format"), STD_C89 },
377 { 'p', 0, 0, N_("precision"), N_("precision in printf format"), STD_C89 },
378 { 'L', 0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 },
379 { 0, 0, 0, NULL, NULL, 0 }
380};
381
382static const format_flag_pair asm_fprintf_flag_pairs[] =
383{
384 { ' ', '+', 1, 0 },
385 { '0', '-', 1, 0 },
386 { '0', 'p', 1, 'i' },
387 { 0, 0, 0, 0 }
388};
0144d886 389
3e038b9d 390static const format_flag_pair gcc_diag_flag_pairs[] =
391{
392 { 0, 0, 0, 0 }
393};
394
7781aa77 395#define gcc_tdiag_flag_pairs gcc_diag_flag_pairs
3e038b9d 396#define gcc_cdiag_flag_pairs gcc_diag_flag_pairs
397#define gcc_cxxdiag_flag_pairs gcc_diag_flag_pairs
398
bbec950d 399static const format_flag_pair gcc_gfc_flag_pairs[] =
400{
401 { 0, 0, 0, 0 }
402};
403
3e038b9d 404static const format_flag_spec gcc_diag_flag_specs[] =
405{
3cf8b391 406 { '+', 0, 0, N_("'+' flag"), N_("the '+' printf flag"), STD_C89 },
eb586f2c 407 { 'q', 0, 0, N_("'q' flag"), N_("the 'q' diagnostic flag"), STD_C89 },
3e038b9d 408 { 'p', 0, 0, N_("precision"), N_("precision in printf format"), STD_C89 },
409 { 'L', 0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 },
410 { 0, 0, 0, NULL, NULL, 0 }
411};
412
7781aa77 413#define gcc_tdiag_flag_specs gcc_diag_flag_specs
3e038b9d 414#define gcc_cdiag_flag_specs gcc_diag_flag_specs
415
416static const format_flag_spec gcc_cxxdiag_flag_specs[] =
417{
eb586f2c 418 { '+', 0, 0, N_("'+' flag"), N_("the '+' printf flag"), STD_C89 },
419 { '#', 0, 0, N_("'#' flag"), N_("the '#' printf flag"), STD_C89 },
420 { 'q', 0, 0, N_("'q' flag"), N_("the 'q' diagnostic flag"), STD_C89 },
3e038b9d 421 { 'p', 0, 0, N_("precision"), N_("precision in printf format"), STD_C89 },
422 { 'L', 0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 },
423 { 0, 0, 0, NULL, NULL, 0 }
424};
425
0144d886 426static const format_flag_spec scanf_flag_specs[] =
427{
1a5a5cd8 428 { '*', 0, 0, N_("assignment suppression"), N_("the assignment suppression scanf feature"), STD_C89 },
eb586f2c 429 { 'a', 0, 0, N_("'a' flag"), N_("the 'a' scanf flag"), STD_EXT },
1a5a5cd8 430 { 'w', 0, 0, N_("field width"), N_("field width in scanf format"), STD_C89 },
431 { 'L', 0, 0, N_("length modifier"), N_("length modifier in scanf format"), STD_C89 },
eb586f2c 432 { '\'', 0, 0, N_("''' flag"), N_("the ''' scanf flag"), STD_EXT },
433 { 'I', 0, 0, N_("'I' flag"), N_("the 'I' scanf flag"), STD_EXT },
0144d886 434 { 0, 0, 0, NULL, NULL, 0 }
435};
436
437
438static const format_flag_pair scanf_flag_pairs[] =
439{
440 { '*', 'L', 0, 0 },
441 { 0, 0, 0, 0 }
442};
443
444
445static const format_flag_spec strftime_flag_specs[] =
446{
eb586f2c 447 { '_', 0, 0, N_("'_' flag"), N_("the '_' strftime flag"), STD_EXT },
448 { '-', 0, 0, N_("'-' flag"), N_("the '-' strftime flag"), STD_EXT },
449 { '0', 0, 0, N_("'0' flag"), N_("the '0' strftime flag"), STD_EXT },
450 { '^', 0, 0, N_("'^' flag"), N_("the '^' strftime flag"), STD_EXT },
451 { '#', 0, 0, N_("'#' flag"), N_("the '#' strftime flag"), STD_EXT },
0144d886 452 { 'w', 0, 0, N_("field width"), N_("field width in strftime format"), STD_EXT },
eb586f2c 453 { 'E', 0, 0, N_("'E' modifier"), N_("the 'E' strftime modifier"), STD_C99 },
454 { 'O', 0, 0, N_("'O' modifier"), N_("the 'O' strftime modifier"), STD_C99 },
455 { 'O', 'o', 0, NULL, N_("the 'O' modifier"), STD_EXT },
0144d886 456 { 0, 0, 0, NULL, NULL, 0 }
457};
458
459
460static const format_flag_pair strftime_flag_pairs[] =
461{
462 { 'E', 'O', 0, 0 },
463 { '_', '-', 0, 0 },
464 { '_', '0', 0, 0 },
465 { '-', '0', 0, 0 },
466 { '^', '#', 0, 0 },
467 { 0, 0, 0, 0 }
468};
469
470
471static const format_flag_spec strfmon_flag_specs[] =
472{
473 { '=', 0, 1, N_("fill character"), N_("fill character in strfmon format"), STD_C89 },
eb586f2c 474 { '^', 0, 0, N_("'^' flag"), N_("the '^' strfmon flag"), STD_C89 },
475 { '+', 0, 0, N_("'+' flag"), N_("the '+' strfmon flag"), STD_C89 },
476 { '(', 0, 0, N_("'(' flag"), N_("the '(' strfmon flag"), STD_C89 },
477 { '!', 0, 0, N_("'!' flag"), N_("the '!' strfmon flag"), STD_C89 },
478 { '-', 0, 0, N_("'-' flag"), N_("the '-' strfmon flag"), STD_C89 },
0144d886 479 { 'w', 0, 0, N_("field width"), N_("field width in strfmon format"), STD_C89 },
480 { '#', 0, 0, N_("left precision"), N_("left precision in strfmon format"), STD_C89 },
481 { 'p', 0, 0, N_("right precision"), N_("right precision in strfmon format"), STD_C89 },
482 { 'L', 0, 0, N_("length modifier"), N_("length modifier in strfmon format"), STD_C89 },
483 { 0, 0, 0, NULL, NULL, 0 }
484};
485
486static const format_flag_pair strfmon_flag_pairs[] =
487{
488 { '+', '(', 0, 0 },
489 { 0, 0, 0, 0 }
490};
491
492
0144d886 493static const format_char_info print_char_table[] =
494{
495 /* C89 conversion specifiers. */
c4503c0a 496 { "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 },
497 { "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 },
498 { "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 },
499 { "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 },
500 { "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 },
501 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, T94_WI, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "", NULL },
502 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "cR", NULL },
503 { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "c", NULL },
504 { "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 },
0144d886 505 /* C99 conversion specifiers. */
c4503c0a 506 { "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 },
507 { "aA", 0, STD_C99, { T99_D, BADLEN, BADLEN, T99_D, BADLEN, T99_LD, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0 +#", "", NULL },
0144d886 508 /* X/Open conversion specifiers. */
c4503c0a 509 { "C", 0, STD_EXT, { TEX_WI, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "", NULL },
510 { "S", 1, STD_EXT, { TEX_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "R", NULL },
0144d886 511 /* GNU conversion specifiers. */
c4503c0a 512 { "m", 0, STD_EXT, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "", NULL },
1e9af880 513 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
0144d886 514};
515
c54d077b 516static const format_char_info asm_fprintf_char_table[] =
517{
518 /* C89 conversion specifiers. */
c4503c0a 519 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0 +", "i", NULL },
520 { "oxX", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0#", "i", NULL },
521 { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp0", "i", NULL },
522 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-w", "", NULL },
523 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "-wp", "cR", NULL },
c54d077b 524
525 /* asm_fprintf conversion specifiers. */
1e9af880 526 { "O", 0, STD_C89, NOARGUMENTS, "", "", NULL },
527 { "R", 0, STD_C89, NOARGUMENTS, "", "", NULL },
528 { "I", 0, STD_C89, NOARGUMENTS, "", "", NULL },
529 { "L", 0, STD_C89, NOARGUMENTS, "", "", NULL },
530 { "U", 0, STD_C89, NOARGUMENTS, "", "", NULL },
c4503c0a 531 { "r", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "", NULL },
1e9af880 532 { "@", 0, STD_C89, NOARGUMENTS, "", "", NULL },
533 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
c54d077b 534};
535
3e038b9d 536static const format_char_info gcc_diag_char_table[] =
537{
538 /* C89 conversion specifiers. */
c4503c0a 539 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
540 { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
541 { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
542 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
543 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL },
544 { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL },
3e038b9d 545
546 /* Custom conversion specifiers. */
547
548 /* %H will require "location_t" at runtime. */
c4503c0a 549 { "H", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
3e038b9d 550
9bc3739f 551 /* These will require a "tree" at runtime. */
c4503c0a 552 { "J", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
9bc3739f 553
1e9af880 554 { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL },
555 { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL },
556 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
3e038b9d 557};
558
7781aa77 559static const format_char_info gcc_tdiag_char_table[] =
560{
561 /* C89 conversion specifiers. */
562 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
563 { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
564 { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
565 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
566 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL },
567 { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL },
568
569 /* Custom conversion specifiers. */
570
571 /* %H will require "location_t" at runtime. */
572 { "H", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
573
574 /* These will require a "tree" at runtime. */
575 { "DFJT", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q+", "", NULL },
576
577 { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL },
578 { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL },
579 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
580};
581
3e038b9d 582static const format_char_info gcc_cdiag_char_table[] =
583{
584 /* C89 conversion specifiers. */
c4503c0a 585 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
586 { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
587 { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
588 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
589 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL },
590 { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL },
3e038b9d 591
592 /* Custom conversion specifiers. */
593
594 /* %H will require "location_t" at runtime. */
c4503c0a 595 { "H", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
3e038b9d 596
597 /* These will require a "tree" at runtime. */
c4503c0a 598 { "DEFJT", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q+", "", NULL },
3e038b9d 599
1e9af880 600 { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL },
601 { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL },
602 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
3e038b9d 603};
604
605static const format_char_info gcc_cxxdiag_char_table[] =
606{
607 /* C89 conversion specifiers. */
c4503c0a 608 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, T89_L, T9L_LL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
609 { "ox", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
610 { "u", 0, STD_C89, { T89_UI, BADLEN, BADLEN, T89_UL, T9L_ULL, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
611 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
612 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "pq", "cR", NULL },
613 { "p", 1, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "c", NULL },
3e038b9d 614
615 /* Custom conversion specifiers. */
616
617 /* %H will require "location_t" at runtime. */
c4503c0a 618 { "H", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
3e038b9d 619
620 /* These will require a "tree" at runtime. */
c4503c0a 621 { "ADEFJTV",0,STD_C89,{ T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q+#", "", NULL },
3e038b9d 622
eb586f2c 623 /* These accept either an 'int' or an 'enum tree_code' (which is handled as an 'int'.) */
c4503c0a 624 { "CLOPQ",0,STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "q", "", NULL },
3e038b9d 625
1e9af880 626 { "<>'", 0, STD_C89, NOARGUMENTS, "", "", NULL },
627 { "m", 0, STD_C89, NOARGUMENTS, "q", "", NULL },
628 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
3e038b9d 629};
630
bbec950d 631static const format_char_info gcc_gfc_char_table[] =
632{
633 /* C89 conversion specifiers. */
634 { "di", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "", NULL },
635 { "c", 0, STD_C89, { T89_I, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "", NULL },
636 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "cR", NULL },
637
638 /* gfc conversion specifiers. */
639
640 { "C", 0, STD_C89, NOARGUMENTS, "", "", NULL },
641
642 /* This will require a "locus" at runtime. */
643 { "L", 0, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "", "R", NULL },
644
645 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
646};
647
0144d886 648static const format_char_info scan_char_table[] =
649{
650 /* C89 conversion specifiers. */
c4503c0a 651 { "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 },
652 { "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 },
653 { "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 },
654 { "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 },
655 { "c", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*w", "cW", NULL },
656 { "s", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*aw", "cW", NULL },
657 { "[", 1, STD_C89, { T89_C, BADLEN, BADLEN, T94_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*aw", "cW[", NULL },
658 { "p", 2, STD_C89, { T89_V, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*w", "W", NULL },
659 { "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 },
0144d886 660 /* C99 conversion specifiers. */
c4503c0a 661 { "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 },
662 { "aA", 1, STD_C99, { T99_F, BADLEN, BADLEN, T99_D, BADLEN, T99_LD, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*w'", "W", NULL },
0144d886 663 /* X/Open conversion specifiers. */
c4503c0a 664 { "C", 1, STD_EXT, { TEX_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*w", "W", NULL },
665 { "S", 1, STD_EXT, { TEX_W, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "*aw", "W", NULL },
1e9af880 666 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
0144d886 667};
668
669static const format_char_info time_char_table[] =
670{
671 /* C89 conversion specifiers. */
1e9af880 672 { "ABZab", 0, STD_C89, NOLENGTHS, "^#", "", NULL },
673 { "cx", 0, STD_C89, NOLENGTHS, "E", "3", NULL },
674 { "HIMSUWdmw", 0, STD_C89, NOLENGTHS, "-_0Ow", "", NULL },
675 { "j", 0, STD_C89, NOLENGTHS, "-_0Ow", "o", NULL },
676 { "p", 0, STD_C89, NOLENGTHS, "#", "", NULL },
677 { "X", 0, STD_C89, NOLENGTHS, "E", "", NULL },
678 { "y", 0, STD_C89, NOLENGTHS, "EO-_0w", "4", NULL },
679 { "Y", 0, STD_C89, NOLENGTHS, "-_0EOw", "o", NULL },
680 { "%", 0, STD_C89, NOLENGTHS, "", "", NULL },
0144d886 681 /* C99 conversion specifiers. */
1e9af880 682 { "C", 0, STD_C99, NOLENGTHS, "-_0EOw", "o", NULL },
683 { "D", 0, STD_C99, NOLENGTHS, "", "2", NULL },
684 { "eVu", 0, STD_C99, NOLENGTHS, "-_0Ow", "", NULL },
685 { "FRTnrt", 0, STD_C99, NOLENGTHS, "", "", NULL },
686 { "g", 0, STD_C99, NOLENGTHS, "O-_0w", "2o", NULL },
687 { "G", 0, STD_C99, NOLENGTHS, "-_0Ow", "o", NULL },
688 { "h", 0, STD_C99, NOLENGTHS, "^#", "", NULL },
689 { "z", 0, STD_C99, NOLENGTHS, "O", "o", NULL },
0144d886 690 /* GNU conversion specifiers. */
1e9af880 691 { "kls", 0, STD_EXT, NOLENGTHS, "-_0Ow", "", NULL },
692 { "P", 0, STD_EXT, NOLENGTHS, "", "", NULL },
693 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
0144d886 694};
695
696static const format_char_info monetary_char_table[] =
697{
c4503c0a 698 { "in", 0, STD_C89, { T89_D, BADLEN, BADLEN, BADLEN, BADLEN, T89_LD, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN, BADLEN }, "=^+(!-w#p", "", NULL },
1e9af880 699 { NULL, 0, 0, NOLENGTHS, NULL, NULL, NULL }
0144d886 700};
701
0144d886 702/* This must be in the same order as enum format_type. */
c54d077b 703static const format_kind_info format_types_orig[] =
0144d886 704{
705 { "printf", printf_length_specs, print_char_table, " +#0-'I", NULL,
706 printf_flag_specs, printf_flag_pairs,
707 FMT_FLAG_ARG_CONVERT|FMT_FLAG_DOLLAR_MULTIPLE|FMT_FLAG_USE_DOLLAR|FMT_FLAG_EMPTY_PREC_OK,
708 'w', 0, 'p', 0, 'L',
709 &integer_type_node, &integer_type_node
710 },
c54d077b 711 { "asm_fprintf", asm_fprintf_length_specs, asm_fprintf_char_table, " +#0-", NULL,
712 asm_fprintf_flag_specs, asm_fprintf_flag_pairs,
713 FMT_FLAG_ARG_CONVERT|FMT_FLAG_EMPTY_PREC_OK,
714 'w', 0, 'p', 0, 'L',
207e0c7d 715 NULL, NULL
c54d077b 716 },
3cf8b391 717 { "gcc_diag", gcc_diag_length_specs, gcc_diag_char_table, "q+", NULL,
3e038b9d 718 gcc_diag_flag_specs, gcc_diag_flag_pairs,
719 FMT_FLAG_ARG_CONVERT,
720 0, 0, 'p', 0, 'L',
721 NULL, &integer_type_node
722 },
7781aa77 723 { "gcc_tdiag", gcc_tdiag_length_specs, gcc_tdiag_char_table, "q+", NULL,
724 gcc_tdiag_flag_specs, gcc_tdiag_flag_pairs,
725 FMT_FLAG_ARG_CONVERT,
726 0, 0, 'p', 0, 'L',
727 NULL, &integer_type_node
728 },
3cf8b391 729 { "gcc_cdiag", gcc_cdiag_length_specs, gcc_cdiag_char_table, "q+", NULL,
3e038b9d 730 gcc_cdiag_flag_specs, gcc_cdiag_flag_pairs,
731 FMT_FLAG_ARG_CONVERT,
732 0, 0, 'p', 0, 'L',
733 NULL, &integer_type_node
734 },
89e7e005 735 { "gcc_cxxdiag", gcc_cxxdiag_length_specs, gcc_cxxdiag_char_table, "q+#", NULL,
3e038b9d 736 gcc_cxxdiag_flag_specs, gcc_cxxdiag_flag_pairs,
737 FMT_FLAG_ARG_CONVERT,
738 0, 0, 'p', 0, 'L',
739 NULL, &integer_type_node
740 },
bbec950d 741 { "gcc_gfc", NULL, gcc_gfc_char_table, "", NULL,
742 NULL, gcc_gfc_flag_pairs,
743 FMT_FLAG_ARG_CONVERT,
744 0, 0, 0, 0, 0,
745 NULL, NULL
746 },
0144d886 747 { "scanf", scanf_length_specs, scan_char_table, "*'I", NULL,
748 scanf_flag_specs, scanf_flag_pairs,
b2306c7f 749 FMT_FLAG_ARG_CONVERT|FMT_FLAG_SCANF_A_KLUDGE|FMT_FLAG_USE_DOLLAR|FMT_FLAG_ZERO_WIDTH_BAD|FMT_FLAG_DOLLAR_GAP_POINTER_OK,
0144d886 750 'w', 0, 0, '*', 'L',
751 NULL, NULL
752 },
753 { "strftime", NULL, time_char_table, "_-0^#", "EO",
754 strftime_flag_specs, strftime_flag_pairs,
755 FMT_FLAG_FANCY_PERCENT_OK, 'w', 0, 0, 0, 0,
756 NULL, NULL
757 },
758 { "strfmon", strfmon_length_specs, monetary_char_table, "=^+(!-", NULL,
759 strfmon_flag_specs, strfmon_flag_pairs,
760 FMT_FLAG_ARG_CONVERT, 'w', '#', 'p', 0, 'L',
761 NULL, NULL
762 }
763};
764
c54d077b 765/* This layer of indirection allows GCC to reassign format_types with
766 new data if necessary, while still allowing the original data to be
767 const. */
768static const format_kind_info *format_types = format_types_orig;
1e9af880 769/* We can modify this one. We also add target-specific format types
770 to the end of the array. */
3dc4d00f 771static format_kind_info *dynamic_format_types;
0144d886 772
1e9af880 773static int n_format_types = ARRAY_SIZE (format_types_orig);
774
0144d886 775/* Structure detailing the results of checking a format function call
776 where the format expression may be a conditional expression with
777 many leaves resulting from nested conditional expressions. */
778typedef struct
779{
780 /* Number of leaves of the format argument that could not be checked
781 as they were not string literals. */
782 int number_non_literal;
783 /* Number of leaves of the format argument that were null pointers or
784 string literals, but had extra format arguments. */
785 int number_extra_args;
786 /* Number of leaves of the format argument that were null pointers or
787 string literals, but had extra format arguments and used $ operand
788 numbers. */
789 int number_dollar_extra_args;
790 /* Number of leaves of the format argument that were wide string
791 literals. */
792 int number_wide;
793 /* Number of leaves of the format argument that were empty strings. */
794 int number_empty;
795 /* Number of leaves of the format argument that were unterminated
796 strings. */
797 int number_unterminated;
798 /* Number of leaves of the format argument that were not counted above. */
799 int number_other;
800} format_check_results;
801
dbf6c367 802typedef struct
803{
804 format_check_results *res;
805 function_format_info *info;
806 tree params;
dbf6c367 807} format_check_context;
808
1b1f2444 809static void check_format_info (function_format_info *, tree);
1cae46be 810static void check_format_arg (void *, tree, unsigned HOST_WIDE_INT);
1b1f2444 811static void check_format_info_main (format_check_results *,
1cae46be 812 function_format_info *,
813 const char *, int, tree,
814 unsigned HOST_WIDE_INT);
0144d886 815
1cae46be 816static void init_dollar_format_checking (int, tree);
1b1f2444 817static int maybe_read_dollar_number (const char **, int,
1cae46be 818 tree, tree *, const format_kind_info *);
1b1f2444 819static bool avoid_dollar_number (const char *);
820static void finish_dollar_format_checking (format_check_results *, int);
0144d886 821
1cae46be 822static const format_flag_spec *get_flag_spec (const format_flag_spec *,
823 int, const char *);
0144d886 824
31266980 825static void check_format_types (format_wanted_type *, const char *, int);
826static void format_type_warning (const char *, const char *, int, tree,
827 int, const char *, tree, int);
0144d886 828
829/* Decode a format type from a string, returning the type, or
830 format_type_error if not valid, in which case the caller should print an
831 error message. */
1e9af880 832static int
1cae46be 833decode_format_type (const char *s)
0144d886 834{
835 int i;
836 int slen;
837 slen = strlen (s);
1e9af880 838 for (i = 0; i < n_format_types; i++)
0144d886 839 {
840 int alen;
841 if (!strcmp (s, format_types[i].name))
1e9af880 842 return i;
0144d886 843 alen = strlen (format_types[i].name);
844 if (slen == alen + 4 && s[0] == '_' && s[1] == '_'
845 && s[slen - 1] == '_' && s[slen - 2] == '_'
846 && !strncmp (s + 2, format_types[i].name, alen))
1e9af880 847 return i;
0144d886 848 }
1e9af880 849 return format_type_error;
0144d886 850}
851
852\f
853/* Check the argument list of a call to printf, scanf, etc.
e9a0f285 854 ATTRS are the attributes on the function type.
0144d886 855 PARAMS is the list of argument values. Also, if -Wmissing-format-attribute,
856 warn for calls to vprintf or vscanf in functions with no such format
857 attribute themselves. */
858
859void
1b1f2444 860check_function_format (tree attrs, tree params)
0144d886 861{
e9a0f285 862 tree a;
0144d886 863
e9a0f285 864 /* See if this function has any format attributes. */
865 for (a = attrs; a; a = TREE_CHAIN (a))
0144d886 866 {
e9a0f285 867 if (is_attribute_p ("format", TREE_PURPOSE (a)))
0144d886 868 {
869 /* Yup; check it. */
e9a0f285 870 function_format_info info;
871 decode_format_attr (TREE_VALUE (a), &info, 1);
95c90e04 872 if (warn_format)
873 check_format_info (&info, params);
e9a0f285 874 if (warn_missing_format_attribute && info.first_arg_num == 0
875 && (format_types[info.format_type].flags
0fd4500a 876 & (int) FMT_FLAG_ARG_CONVERT))
0144d886 877 {
e9a0f285 878 tree c;
879 for (c = TYPE_ATTRIBUTES (TREE_TYPE (current_function_decl));
880 c;
881 c = TREE_CHAIN (c))
882 if (is_attribute_p ("format", TREE_PURPOSE (c))
883 && (decode_format_type (IDENTIFIER_POINTER
884 (TREE_VALUE (TREE_VALUE (c))))
885 == info.format_type))
0144d886 886 break;
e9a0f285 887 if (c == NULL_TREE)
0144d886 888 {
889 /* Check if the current function has a parameter to which
890 the format attribute could be attached; if not, it
891 can't be a candidate for a format attribute, despite
892 the vprintf-like or vscanf-like call. */
893 tree args;
894 for (args = DECL_ARGUMENTS (current_function_decl);
895 args != 0;
896 args = TREE_CHAIN (args))
897 {
898 if (TREE_CODE (TREE_TYPE (args)) == POINTER_TYPE
899 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (args)))
900 == char_type_node))
901 break;
902 }
903 if (args != 0)
8f7040d4 904 warning (OPT_Wmissing_format_attribute, "function might "
905 "be possible candidate for %qs format attribute",
e9a0f285 906 format_types[info.format_type].name);
0144d886 907 }
908 }
0144d886 909 }
910 }
911}
912
0144d886 913
914/* Variables used by the checking of $ operand number formats. */
915static char *dollar_arguments_used = NULL;
b2306c7f 916static char *dollar_arguments_pointer_p = NULL;
0144d886 917static int dollar_arguments_alloc = 0;
918static int dollar_arguments_count;
919static int dollar_first_arg_num;
920static int dollar_max_arg_used;
921static int dollar_format_warned;
922
923/* Initialize the checking for a format string that may contain $
924 parameter number specifications; we will need to keep track of whether
925 each parameter has been used. FIRST_ARG_NUM is the number of the first
926 argument that is a parameter to the format, or 0 for a vprintf-style
927 function; PARAMS is the list of arguments starting at this argument. */
928
929static void
1cae46be 930init_dollar_format_checking (int first_arg_num, tree params)
0144d886 931{
b2306c7f 932 tree oparams = params;
933
0144d886 934 dollar_first_arg_num = first_arg_num;
935 dollar_arguments_count = 0;
936 dollar_max_arg_used = 0;
937 dollar_format_warned = 0;
938 if (first_arg_num > 0)
939 {
940 while (params)
941 {
942 dollar_arguments_count++;
943 params = TREE_CHAIN (params);
944 }
945 }
946 if (dollar_arguments_alloc < dollar_arguments_count)
947 {
948 if (dollar_arguments_used)
949 free (dollar_arguments_used);
b2306c7f 950 if (dollar_arguments_pointer_p)
951 free (dollar_arguments_pointer_p);
0144d886 952 dollar_arguments_alloc = dollar_arguments_count;
4fd61bc6 953 dollar_arguments_used = XNEWVEC (char, dollar_arguments_alloc);
954 dollar_arguments_pointer_p = XNEWVEC (char, dollar_arguments_alloc);
0144d886 955 }
956 if (dollar_arguments_alloc)
b2306c7f 957 {
958 memset (dollar_arguments_used, 0, dollar_arguments_alloc);
959 if (first_arg_num > 0)
960 {
961 int i = 0;
962 params = oparams;
963 while (params)
964 {
965 dollar_arguments_pointer_p[i] = (TREE_CODE (TREE_TYPE (TREE_VALUE (params)))
966 == POINTER_TYPE);
967 params = TREE_CHAIN (params);
968 i++;
969 }
970 }
971 }
0144d886 972}
973
974
975/* Look for a decimal number followed by a $ in *FORMAT. If DOLLAR_NEEDED
976 is set, it is an error if one is not found; otherwise, it is OK. If
977 such a number is found, check whether it is within range and mark that
978 numbered operand as being used for later checking. Returns the operand
979 number if found and within range, zero if no such number was found and
980 this is OK, or -1 on error. PARAMS points to the first operand of the
981 format; PARAM_PTR is made to point to the parameter referred to. If
982 a $ format is found, *FORMAT is updated to point just after it. */
983
984static int
1b1f2444 985maybe_read_dollar_number (const char **format,
1cae46be 986 int dollar_needed, tree params, tree *param_ptr,
987 const format_kind_info *fki)
0144d886 988{
989 int argnum;
990 int overflow_flag;
991 const char *fcp = *format;
84166705 992 if (!ISDIGIT (*fcp))
0144d886 993 {
994 if (dollar_needed)
995 {
6bf97f82 996 warning (OPT_Wformat, "missing $ operand number in format");
0144d886 997 return -1;
998 }
999 else
1000 return 0;
1001 }
1002 argnum = 0;
1003 overflow_flag = 0;
66a33570 1004 while (ISDIGIT (*fcp))
0144d886 1005 {
1006 int nargnum;
1007 nargnum = 10 * argnum + (*fcp - '0');
1008 if (nargnum < 0 || nargnum / 10 != argnum)
1009 overflow_flag = 1;
1010 argnum = nargnum;
1011 fcp++;
1012 }
1013 if (*fcp != '$')
1014 {
1015 if (dollar_needed)
1016 {
6bf97f82 1017 warning (OPT_Wformat, "missing $ operand number in format");
0144d886 1018 return -1;
1019 }
1020 else
1021 return 0;
1022 }
1023 *format = fcp + 1;
1024 if (pedantic && !dollar_format_warned)
1025 {
6bf97f82 1026 warning (OPT_Wformat, "%s does not support %%n$ operand number formats",
1b1f2444 1027 C_STD_NAME (STD_EXT));
0144d886 1028 dollar_format_warned = 1;
1029 }
1030 if (overflow_flag || argnum == 0
1031 || (dollar_first_arg_num && argnum > dollar_arguments_count))
1032 {
6bf97f82 1033 warning (OPT_Wformat, "operand number out of range in format");
0144d886 1034 return -1;
1035 }
1036 if (argnum > dollar_max_arg_used)
1037 dollar_max_arg_used = argnum;
1038 /* For vprintf-style functions we may need to allocate more memory to
1039 track which arguments are used. */
1040 while (dollar_arguments_alloc < dollar_max_arg_used)
1041 {
1042 int nalloc;
1043 nalloc = 2 * dollar_arguments_alloc + 16;
4fd61bc6 1044 dollar_arguments_used = XRESIZEVEC (char, dollar_arguments_used,
1045 nalloc);
1046 dollar_arguments_pointer_p = XRESIZEVEC (char, dollar_arguments_pointer_p,
1047 nalloc);
0144d886 1048 memset (dollar_arguments_used + dollar_arguments_alloc, 0,
1049 nalloc - dollar_arguments_alloc);
1050 dollar_arguments_alloc = nalloc;
1051 }
0fd4500a 1052 if (!(fki->flags & (int) FMT_FLAG_DOLLAR_MULTIPLE)
0144d886 1053 && dollar_arguments_used[argnum - 1] == 1)
1054 {
1055 dollar_arguments_used[argnum - 1] = 2;
6bf97f82 1056 warning (OPT_Wformat, "format argument %d used more than once in %s format",
1b1f2444 1057 argnum, fki->name);
0144d886 1058 }
1059 else
1060 dollar_arguments_used[argnum - 1] = 1;
1061 if (dollar_first_arg_num)
1062 {
1063 int i;
1064 *param_ptr = params;
1065 for (i = 1; i < argnum && *param_ptr != 0; i++)
1066 *param_ptr = TREE_CHAIN (*param_ptr);
1067
231bd014 1068 /* This case shouldn't be caught here. */
1069 gcc_assert (*param_ptr);
0144d886 1070 }
1071 else
1072 *param_ptr = 0;
1073 return argnum;
1074}
1075
448748a4 1076/* Ensure that FORMAT does not start with a decimal number followed by
1077 a $; give a diagnostic and return true if it does, false otherwise. */
1078
1079static bool
1b1f2444 1080avoid_dollar_number (const char *format)
448748a4 1081{
1082 if (!ISDIGIT (*format))
1083 return false;
1084 while (ISDIGIT (*format))
1085 format++;
1086 if (*format == '$')
1087 {
6bf97f82 1088 warning (OPT_Wformat, "$ operand number used after format without operand number");
448748a4 1089 return true;
1090 }
1091 return false;
1092}
1093
0144d886 1094
1095/* Finish the checking for a format string that used $ operand number formats
1096 instead of non-$ formats. We check for unused operands before used ones
1097 (a serious error, since the implementation of the format function
1098 can't know what types to pass to va_arg to find the later arguments).
1099 and for unused operands at the end of the format (if we know how many
1100 arguments the format had, so not for vprintf). If there were operand
1101 numbers out of range on a non-vprintf-style format, we won't have reached
b2306c7f 1102 here. If POINTER_GAP_OK, unused arguments are OK if all arguments are
1103 pointers. */
0144d886 1104
1105static void
1b1f2444 1106finish_dollar_format_checking (format_check_results *res, int pointer_gap_ok)
0144d886 1107{
1108 int i;
b2306c7f 1109 bool found_pointer_gap = false;
0144d886 1110 for (i = 0; i < dollar_max_arg_used; i++)
1111 {
1112 if (!dollar_arguments_used[i])
b2306c7f 1113 {
1114 if (pointer_gap_ok && (dollar_first_arg_num == 0
1115 || dollar_arguments_pointer_p[i]))
1116 found_pointer_gap = true;
1117 else
6bf97f82 1118 warning (OPT_Wformat,
1119 "format argument %d unused before used argument %d in $-style format",
1b1f2444 1120 i + 1, dollar_max_arg_used);
b2306c7f 1121 }
0144d886 1122 }
b2306c7f 1123 if (found_pointer_gap
1124 || (dollar_first_arg_num
1125 && dollar_max_arg_used < dollar_arguments_count))
0144d886 1126 {
1127 res->number_other--;
1128 res->number_dollar_extra_args++;
1129 }
1130}
1131
1132
1133/* Retrieve the specification for a format flag. SPEC contains the
1134 specifications for format flags for the applicable kind of format.
1135 FLAG is the flag in question. If PREDICATES is NULL, the basic
89f18f73 1136 spec for that flag must be retrieved and must exist. If
1137 PREDICATES is not NULL, it is a string listing possible predicates
1138 for the spec entry; if an entry predicated on any of these is
1139 found, it is returned, otherwise NULL is returned. */
0144d886 1140
1141static const format_flag_spec *
1cae46be 1142get_flag_spec (const format_flag_spec *spec, int flag, const char *predicates)
0144d886 1143{
1144 int i;
1145 for (i = 0; spec[i].flag_char != 0; i++)
1146 {
1147 if (spec[i].flag_char != flag)
1148 continue;
1149 if (predicates != NULL)
1150 {
1151 if (spec[i].predicate != 0
1152 && strchr (predicates, spec[i].predicate) != 0)
1153 return &spec[i];
1154 }
1155 else if (spec[i].predicate == 0)
1156 return &spec[i];
1157 }
231bd014 1158 gcc_assert (predicates);
1159 return NULL;
0144d886 1160}
1161
1162
1163/* Check the argument list of a call to printf, scanf, etc.
1164 INFO points to the function_format_info structure.
1165 PARAMS is the list of argument values. */
1166
1167static void
1b1f2444 1168check_format_info (function_format_info *info, tree params)
0144d886 1169{
dbf6c367 1170 format_check_context format_ctx;
e9a0f285 1171 unsigned HOST_WIDE_INT arg_num;
0144d886 1172 tree format_tree;
1173 format_check_results res;
1174 /* Skip to format argument. If the argument isn't available, there's
1175 no work for us to do; prototype checking will catch the problem. */
1176 for (arg_num = 1; ; ++arg_num)
1177 {
1178 if (params == 0)
1179 return;
1180 if (arg_num == info->format_num)
1181 break;
1182 params = TREE_CHAIN (params);
1183 }
1184 format_tree = TREE_VALUE (params);
1185 params = TREE_CHAIN (params);
1186 if (format_tree == 0)
1187 return;
1188
1189 res.number_non_literal = 0;
1190 res.number_extra_args = 0;
1191 res.number_dollar_extra_args = 0;
1192 res.number_wide = 0;
1193 res.number_empty = 0;
1194 res.number_unterminated = 0;
1195 res.number_other = 0;
1196
dbf6c367 1197 format_ctx.res = &res;
1198 format_ctx.info = info;
1199 format_ctx.params = params;
dbf6c367 1200
1201 check_function_arguments_recurse (check_format_arg, &format_ctx,
1202 format_tree, arg_num);
0144d886 1203
1204 if (res.number_non_literal > 0)
1205 {
1206 /* Functions taking a va_list normally pass a non-literal format
1207 string. These functions typically are declared with
1208 first_arg_num == 0, so avoid warning in those cases. */
0fd4500a 1209 if (!(format_types[info->format_type].flags & (int) FMT_FLAG_ARG_CONVERT))
0144d886 1210 {
1211 /* For strftime-like formats, warn for not checking the format
1212 string; but there are no arguments to check. */
8b6866af 1213 warning (OPT_Wformat_nonliteral,
1214 "format not a string literal, format string not checked");
0144d886 1215 }
1216 else if (info->first_arg_num != 0)
1217 {
1218 /* If there are no arguments for the format at all, we may have
1219 printf (foo) which is likely to be a security hole. */
1220 while (arg_num + 1 < info->first_arg_num)
1221 {
1222 if (params == 0)
1223 break;
1224 params = TREE_CHAIN (params);
1225 ++arg_num;
1226 }
8b6866af 1227 if (params == 0 && warn_format_security)
1228 warning (OPT_Wformat_security,
1229 "format not a string literal and no format arguments");
1230 else if (params == 0 && warn_format_nonliteral)
1231 warning (OPT_Wformat_nonliteral,
1232 "format not a string literal and no format arguments");
1233 else
1234 warning (OPT_Wformat_nonliteral,
1235 "format not a string literal, argument types not checked");
0144d886 1236 }
1237 }
1238
1239 /* If there were extra arguments to the format, normally warn. However,
1240 the standard does say extra arguments are ignored, so in the specific
1241 case where we have multiple leaves (conditional expressions or
1242 ngettext) allow extra arguments if at least one leaf didn't have extra
1243 arguments, but was otherwise OK (either non-literal or checked OK).
1244 If the format is an empty string, this should be counted similarly to the
1245 case of extra format arguments. */
1246 if (res.number_extra_args > 0 && res.number_non_literal == 0
6bf97f82 1247 && res.number_other == 0)
1248 warning (OPT_Wformat_extra_args, "too many arguments for format");
0144d886 1249 if (res.number_dollar_extra_args > 0 && res.number_non_literal == 0
6bf97f82 1250 && res.number_other == 0)
1251 warning (OPT_Wformat_extra_args, "unused arguments in $-style format");
0144d886 1252 if (res.number_empty > 0 && res.number_non_literal == 0
6bf97f82 1253 && res.number_other == 0)
1254 warning (OPT_Wformat_zero_length, "zero-length %s format string",
1b1f2444 1255 format_types[info->format_type].name);
0144d886 1256
1257 if (res.number_wide > 0)
6bf97f82 1258 warning (OPT_Wformat, "format is a wide character string");
0144d886 1259
1260 if (res.number_unterminated > 0)
6bf97f82 1261 warning (OPT_Wformat, "unterminated format string");
0144d886 1262}
1263
dbf6c367 1264/* Callback from check_function_arguments_recurse to check a
1265 format string. FORMAT_TREE is the format parameter. ARG_NUM
1266 is the number of the format argument. CTX points to a
1267 format_check_context. */
0144d886 1268
1269static void
1cae46be 1270check_format_arg (void *ctx, tree format_tree,
1271 unsigned HOST_WIDE_INT arg_num)
0144d886 1272{
4fd61bc6 1273 format_check_context *format_ctx = (format_check_context *) ctx;
dbf6c367 1274 format_check_results *res = format_ctx->res;
1275 function_format_info *info = format_ctx->info;
1276 tree params = format_ctx->params;
dbf6c367 1277
0144d886 1278 int format_length;
1fe57f24 1279 HOST_WIDE_INT offset;
0144d886 1280 const char *format_chars;
1281 tree array_size = 0;
1282 tree array_init;
1283
0144d886 1284 if (integer_zerop (format_tree))
1285 {
0144d886 1286 /* Skip to first argument to check, so we can see if this format
1287 has any arguments (it shouldn't). */
1288 while (arg_num + 1 < info->first_arg_num)
1289 {
1290 if (params == 0)
1291 return;
1292 params = TREE_CHAIN (params);
1293 ++arg_num;
1294 }
1295
1296 if (params == 0)
1297 res->number_other++;
1298 else
1299 res->number_extra_args++;
1300
1301 return;
1302 }
1303
1fe57f24 1304 offset = 0;
1305 if (TREE_CODE (format_tree) == PLUS_EXPR)
1306 {
1307 tree arg0, arg1;
1308
1309 arg0 = TREE_OPERAND (format_tree, 0);
1310 arg1 = TREE_OPERAND (format_tree, 1);
1311 STRIP_NOPS (arg0);
1312 STRIP_NOPS (arg1);
1313 if (TREE_CODE (arg1) == INTEGER_CST)
1314 format_tree = arg0;
1315 else if (TREE_CODE (arg0) == INTEGER_CST)
1316 {
1317 format_tree = arg1;
1318 arg1 = arg0;
1319 }
1320 else
1321 {
1322 res->number_non_literal++;
1323 return;
1324 }
c53485bb 1325 if (!host_integerp (arg1, 0)
1326 || (offset = tree_low_cst (arg1, 0)) < 0)
1fe57f24 1327 {
1328 res->number_non_literal++;
1329 return;
1330 }
1fe57f24 1331 }
0144d886 1332 if (TREE_CODE (format_tree) != ADDR_EXPR)
1333 {
1334 res->number_non_literal++;
1335 return;
1336 }
1337 format_tree = TREE_OPERAND (format_tree, 0);
b02995ae 1338 if (TREE_CODE (format_tree) == ARRAY_REF
1339 && host_integerp (TREE_OPERAND (format_tree, 1), 0)
1340 && (offset += tree_low_cst (TREE_OPERAND (format_tree, 1), 0)) >= 0)
1341 format_tree = TREE_OPERAND (format_tree, 0);
0144d886 1342 if (TREE_CODE (format_tree) == VAR_DECL
1343 && TREE_CODE (TREE_TYPE (format_tree)) == ARRAY_TYPE
1344 && (array_init = decl_constant_value (format_tree)) != format_tree
1345 && TREE_CODE (array_init) == STRING_CST)
1346 {
1347 /* Extract the string constant initializer. Note that this may include
1348 a trailing NUL character that is not in the array (e.g.
1349 const char a[3] = "foo";). */
1350 array_size = DECL_SIZE_UNIT (format_tree);
1351 format_tree = array_init;
1352 }
1353 if (TREE_CODE (format_tree) != STRING_CST)
1354 {
1355 res->number_non_literal++;
1356 return;
1357 }
1358 if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (format_tree))) != char_type_node)
1359 {
1360 res->number_wide++;
1361 return;
1362 }
1363 format_chars = TREE_STRING_POINTER (format_tree);
1364 format_length = TREE_STRING_LENGTH (format_tree);
1365 if (array_size != 0)
1366 {
1367 /* Variable length arrays can't be initialized. */
231bd014 1368 gcc_assert (TREE_CODE (array_size) == INTEGER_CST);
1369
0144d886 1370 if (host_integerp (array_size, 0))
1371 {
1372 HOST_WIDE_INT array_size_value = TREE_INT_CST_LOW (array_size);
1373 if (array_size_value > 0
1374 && array_size_value == (int) array_size_value
1375 && format_length > array_size_value)
1376 format_length = array_size_value;
1377 }
1378 }
1fe57f24 1379 if (offset)
1380 {
1381 if (offset >= format_length)
1382 {
1383 res->number_non_literal++;
1384 return;
1385 }
1386 format_chars += offset;
1387 format_length -= offset;
1388 }
0144d886 1389 if (format_length < 1)
1390 {
1391 res->number_unterminated++;
1392 return;
1393 }
1394 if (format_length == 1)
1395 {
1396 res->number_empty++;
1397 return;
1398 }
1399 if (format_chars[--format_length] != 0)
1400 {
1401 res->number_unterminated++;
1402 return;
1403 }
1404
1405 /* Skip to first argument to check. */
1406 while (arg_num + 1 < info->first_arg_num)
1407 {
1408 if (params == 0)
1409 return;
1410 params = TREE_CHAIN (params);
1411 ++arg_num;
1412 }
1413 /* Provisionally increment res->number_other; check_format_info_main
1414 will decrement it if it finds there are extra arguments, but this way
1415 need not adjust it for every return. */
1416 res->number_other++;
1b1f2444 1417 check_format_info_main (res, info, format_chars, format_length,
0144d886 1418 params, arg_num);
1419}
1420
1421
1422/* Do the main part of checking a call to a format function. FORMAT_CHARS
1423 is the NUL-terminated format string (which at this point may contain
1424 internal NUL characters); FORMAT_LENGTH is its length (excluding the
1425 terminating NUL character). ARG_NUM is one less than the number of
1426 the first format argument to check; PARAMS points to that format
1427 argument in the list of arguments. */
1428
1429static void
1b1f2444 1430check_format_info_main (format_check_results *res,
1cae46be 1431 function_format_info *info, const char *format_chars,
1432 int format_length, tree params,
1433 unsigned HOST_WIDE_INT arg_num)
0144d886 1434{
1435 const char *orig_format_chars = format_chars;
1436 tree first_fillin_param = params;
1437
1438 const format_kind_info *fki = &format_types[info->format_type];
1439 const format_flag_spec *flag_specs = fki->flag_specs;
1440 const format_flag_pair *bad_flag_pairs = fki->bad_flag_pairs;
1441
1442 /* -1 if no conversions taking an operand have been found; 0 if one has
1443 and it didn't use $; 1 if $ formats are in use. */
1444 int has_operand_number = -1;
1445
1446 init_dollar_format_checking (info->first_arg_num, first_fillin_param);
1447
1448 while (1)
1449 {
1450 int i;
1451 int suppressed = FALSE;
1452 const char *length_chars = NULL;
1453 enum format_lengths length_chars_val = FMT_LEN_none;
1454 enum format_std_version length_chars_std = STD_C89;
1455 int format_char;
1456 tree cur_param;
1457 tree wanted_type;
1458 int main_arg_num = 0;
1459 tree main_arg_params = 0;
1460 enum format_std_version wanted_type_std;
1461 const char *wanted_type_name;
1462 format_wanted_type width_wanted_type;
1463 format_wanted_type precision_wanted_type;
1464 format_wanted_type main_wanted_type;
1465 format_wanted_type *first_wanted_type = NULL;
1466 format_wanted_type *last_wanted_type = NULL;
1467 const format_length_info *fli = NULL;
1468 const format_char_info *fci = NULL;
1469 char flag_chars[256];
1470 int aflag = 0;
31266980 1471 const char *format_start = format_chars;
0144d886 1472 if (*format_chars == 0)
1473 {
1474 if (format_chars - orig_format_chars != format_length)
6bf97f82 1475 warning (OPT_Wformat, "embedded %<\\0%> in format");
0144d886 1476 if (info->first_arg_num != 0 && params != 0
1477 && has_operand_number <= 0)
1478 {
1479 res->number_other--;
1480 res->number_extra_args++;
1481 }
1482 if (has_operand_number > 0)
1b1f2444 1483 finish_dollar_format_checking (res, fki->flags & (int) FMT_FLAG_DOLLAR_GAP_POINTER_OK);
0144d886 1484 return;
1485 }
1486 if (*format_chars++ != '%')
1487 continue;
1488 if (*format_chars == 0)
1489 {
6bf97f82 1490 warning (OPT_Wformat, "spurious trailing %<%%%> in format");
0144d886 1491 continue;
1492 }
1493 if (*format_chars == '%')
1494 {
1495 ++format_chars;
1496 continue;
1497 }
1498 flag_chars[0] = 0;
1499
0fd4500a 1500 if ((fki->flags & (int) FMT_FLAG_USE_DOLLAR) && has_operand_number != 0)
0144d886 1501 {
1502 /* Possibly read a $ operand number at the start of the format.
1503 If one was previously used, one is required here. If one
1504 is not used here, we can't immediately conclude this is a
1505 format without them, since it could be printf %m or scanf %*. */
1506 int opnum;
1b1f2444 1507 opnum = maybe_read_dollar_number (&format_chars, 0,
0144d886 1508 first_fillin_param,
1509 &main_arg_params, fki);
1510 if (opnum == -1)
1511 return;
1512 else if (opnum > 0)
1513 {
1514 has_operand_number = 1;
1515 main_arg_num = opnum + info->first_arg_num - 1;
1516 }
1517 }
448748a4 1518 else if (fki->flags & FMT_FLAG_USE_DOLLAR)
1519 {
1b1f2444 1520 if (avoid_dollar_number (format_chars))
448748a4 1521 return;
1522 }
0144d886 1523
1524 /* Read any format flags, but do not yet validate them beyond removing
1525 duplicates, since in general validation depends on the rest of
1526 the format. */
1527 while (*format_chars != 0
1528 && strchr (fki->flag_chars, *format_chars) != 0)
1529 {
1530 const format_flag_spec *s = get_flag_spec (flag_specs,
1531 *format_chars, NULL);
1532 if (strchr (flag_chars, *format_chars) != 0)
1533 {
6bf97f82 1534 warning (OPT_Wformat, "repeated %s in format", _(s->name));
0144d886 1535 }
1536 else
1537 {
1538 i = strlen (flag_chars);
1539 flag_chars[i++] = *format_chars;
1540 flag_chars[i] = 0;
1541 }
1542 if (s->skip_next_char)
1543 {
1544 ++format_chars;
1545 if (*format_chars == 0)
1546 {
6bf97f82 1547 warning (OPT_Wformat, "missing fill character at end of strfmon format");
0144d886 1548 return;
1549 }
1550 }
1551 ++format_chars;
1552 }
1553
1554 /* Read any format width, possibly * or *m$. */
1555 if (fki->width_char != 0)
1556 {
1557 if (fki->width_type != NULL && *format_chars == '*')
1558 {
1559 i = strlen (flag_chars);
1560 flag_chars[i++] = fki->width_char;
1561 flag_chars[i] = 0;
1562 /* "...a field width...may be indicated by an asterisk.
1563 In this case, an int argument supplies the field width..." */
1564 ++format_chars;
0144d886 1565 if (has_operand_number != 0)
1566 {
1567 int opnum;
1b1f2444 1568 opnum = maybe_read_dollar_number (&format_chars,
0144d886 1569 has_operand_number == 1,
1570 first_fillin_param,
1571 &params, fki);
1572 if (opnum == -1)
1573 return;
1574 else if (opnum > 0)
1575 {
1576 has_operand_number = 1;
1577 arg_num = opnum + info->first_arg_num - 1;
1578 }
1579 else
1580 has_operand_number = 0;
1581 }
448748a4 1582 else
1583 {
1b1f2444 1584 if (avoid_dollar_number (format_chars))
448748a4 1585 return;
1586 }
0144d886 1587 if (info->first_arg_num != 0)
1588 {
136d950f 1589 if (params == 0)
1590 {
6bf97f82 1591 warning (OPT_Wformat, "too few arguments for format");
136d950f 1592 return;
1593 }
0144d886 1594 cur_param = TREE_VALUE (params);
1595 if (has_operand_number <= 0)
1596 {
1597 params = TREE_CHAIN (params);
1598 ++arg_num;
1599 }
1600 width_wanted_type.wanted_type = *fki->width_type;
1601 width_wanted_type.wanted_type_name = NULL;
1602 width_wanted_type.pointer_count = 0;
1603 width_wanted_type.char_lenient_flag = 0;
1604 width_wanted_type.writing_in_flag = 0;
1605 width_wanted_type.reading_from_flag = 0;
1606 width_wanted_type.name = _("field width");
1607 width_wanted_type.param = cur_param;
1608 width_wanted_type.arg_num = arg_num;
1609 width_wanted_type.next = NULL;
1610 if (last_wanted_type != 0)
1611 last_wanted_type->next = &width_wanted_type;
1612 if (first_wanted_type == 0)
1613 first_wanted_type = &width_wanted_type;
1614 last_wanted_type = &width_wanted_type;
1615 }
1616 }
1617 else
1618 {
1619 /* Possibly read a numeric width. If the width is zero,
1620 we complain if appropriate. */
1621 int non_zero_width_char = FALSE;
1622 int found_width = FALSE;
1623 while (ISDIGIT (*format_chars))
1624 {
1625 found_width = TRUE;
1626 if (*format_chars != '0')
1627 non_zero_width_char = TRUE;
1628 ++format_chars;
1629 }
1630 if (found_width && !non_zero_width_char &&
0fd4500a 1631 (fki->flags & (int) FMT_FLAG_ZERO_WIDTH_BAD))
6bf97f82 1632 warning (OPT_Wformat, "zero width in %s format", fki->name);
0144d886 1633 if (found_width)
1634 {
1635 i = strlen (flag_chars);
1636 flag_chars[i++] = fki->width_char;
1637 flag_chars[i] = 0;
1638 }
1639 }
1640 }
1641
1642 /* Read any format left precision (must be a number, not *). */
1643 if (fki->left_precision_char != 0 && *format_chars == '#')
1644 {
1645 ++format_chars;
1646 i = strlen (flag_chars);
1647 flag_chars[i++] = fki->left_precision_char;
1648 flag_chars[i] = 0;
1649 if (!ISDIGIT (*format_chars))
6bf97f82 1650 warning (OPT_Wformat, "empty left precision in %s format", fki->name);
0144d886 1651 while (ISDIGIT (*format_chars))
1652 ++format_chars;
1653 }
1654
1655 /* Read any format precision, possibly * or *m$. */
1656 if (fki->precision_char != 0 && *format_chars == '.')
1657 {
1658 ++format_chars;
1659 i = strlen (flag_chars);
1660 flag_chars[i++] = fki->precision_char;
1661 flag_chars[i] = 0;
1662 if (fki->precision_type != NULL && *format_chars == '*')
1663 {
1664 /* "...a...precision...may be indicated by an asterisk.
1665 In this case, an int argument supplies the...precision." */
1666 ++format_chars;
1667 if (has_operand_number != 0)
1668 {
1669 int opnum;
1b1f2444 1670 opnum = maybe_read_dollar_number (&format_chars,
0144d886 1671 has_operand_number == 1,
1672 first_fillin_param,
1673 &params, fki);
1674 if (opnum == -1)
1675 return;
1676 else if (opnum > 0)
1677 {
1678 has_operand_number = 1;
1679 arg_num = opnum + info->first_arg_num - 1;
1680 }
1681 else
1682 has_operand_number = 0;
1683 }
448748a4 1684 else
1685 {
1b1f2444 1686 if (avoid_dollar_number (format_chars))
448748a4 1687 return;
1688 }
0144d886 1689 if (info->first_arg_num != 0)
1690 {
1691 if (params == 0)
1692 {
6bf97f82 1693 warning (OPT_Wformat, "too few arguments for format");
0144d886 1694 return;
1695 }
1696 cur_param = TREE_VALUE (params);
1697 if (has_operand_number <= 0)
1698 {
1699 params = TREE_CHAIN (params);
1700 ++arg_num;
1701 }
1702 precision_wanted_type.wanted_type = *fki->precision_type;
1703 precision_wanted_type.wanted_type_name = NULL;
1704 precision_wanted_type.pointer_count = 0;
1705 precision_wanted_type.char_lenient_flag = 0;
1706 precision_wanted_type.writing_in_flag = 0;
1707 precision_wanted_type.reading_from_flag = 0;
1708 precision_wanted_type.name = _("field precision");
1709 precision_wanted_type.param = cur_param;
1710 precision_wanted_type.arg_num = arg_num;
1711 precision_wanted_type.next = NULL;
1712 if (last_wanted_type != 0)
1713 last_wanted_type->next = &precision_wanted_type;
1714 if (first_wanted_type == 0)
1715 first_wanted_type = &precision_wanted_type;
1716 last_wanted_type = &precision_wanted_type;
1717 }
1718 }
1719 else
1720 {
0fd4500a 1721 if (!(fki->flags & (int) FMT_FLAG_EMPTY_PREC_OK)
0144d886 1722 && !ISDIGIT (*format_chars))
6bf97f82 1723 warning (OPT_Wformat, "empty precision in %s format", fki->name);
0144d886 1724 while (ISDIGIT (*format_chars))
1725 ++format_chars;
1726 }
1727 }
1728
1729 /* Read any length modifier, if this kind of format has them. */
1730 fli = fki->length_char_specs;
1731 length_chars = NULL;
1732 length_chars_val = FMT_LEN_none;
1733 length_chars_std = STD_C89;
1734 if (fli)
1735 {
1736 while (fli->name != 0 && fli->name[0] != *format_chars)
1737 fli++;
1738 if (fli->name != 0)
1739 {
1740 format_chars++;
1741 if (fli->double_name != 0 && fli->name[0] == *format_chars)
1742 {
1743 format_chars++;
1744 length_chars = fli->double_name;
1745 length_chars_val = fli->double_index;
1746 length_chars_std = fli->double_std;
1747 }
1748 else
1749 {
1750 length_chars = fli->name;
1751 length_chars_val = fli->index;
1752 length_chars_std = fli->std;
1753 }
1754 i = strlen (flag_chars);
1755 flag_chars[i++] = fki->length_code_char;
1756 flag_chars[i] = 0;
1757 }
1758 if (pedantic)
1759 {
1760 /* Warn if the length modifier is non-standard. */
1761 if (ADJ_STD (length_chars_std) > C_STD_VER)
6bf97f82 1762 warning (OPT_Wformat,
1763 "%s does not support the %qs %s length modifier",
1b1f2444 1764 C_STD_NAME (length_chars_std), length_chars,
1765 fki->name);
0144d886 1766 }
1767 }
1768
1769 /* Read any modifier (strftime E/O). */
1770 if (fki->modifier_chars != NULL)
1771 {
1772 while (*format_chars != 0
1773 && strchr (fki->modifier_chars, *format_chars) != 0)
1774 {
1775 if (strchr (flag_chars, *format_chars) != 0)
1776 {
1777 const format_flag_spec *s = get_flag_spec (flag_specs,
1778 *format_chars, NULL);
6bf97f82 1779 warning (OPT_Wformat, "repeated %s in format", _(s->name));
0144d886 1780 }
1781 else
1782 {
1783 i = strlen (flag_chars);
1784 flag_chars[i++] = *format_chars;
1785 flag_chars[i] = 0;
1786 }
1787 ++format_chars;
1788 }
1789 }
1790
1791 /* Handle the scanf allocation kludge. */
0fd4500a 1792 if (fki->flags & (int) FMT_FLAG_SCANF_A_KLUDGE)
0144d886 1793 {
1794 if (*format_chars == 'a' && !flag_isoc99)
1795 {
1796 if (format_chars[1] == 's' || format_chars[1] == 'S'
1797 || format_chars[1] == '[')
1798 {
eb586f2c 1799 /* 'a' is used as a flag. */
0144d886 1800 i = strlen (flag_chars);
1801 flag_chars[i++] = 'a';
1802 flag_chars[i] = 0;
1803 format_chars++;
1804 }
1805 }
1806 }
1807
1808 format_char = *format_chars;
1809 if (format_char == 0
0fd4500a 1810 || (!(fki->flags & (int) FMT_FLAG_FANCY_PERCENT_OK)
1811 && format_char == '%'))
0144d886 1812 {
6bf97f82 1813 warning (OPT_Wformat, "conversion lacks type at end of format");
0144d886 1814 continue;
1815 }
1816 format_chars++;
1817 fci = fki->conversion_specs;
1818 while (fci->format_chars != 0
1819 && strchr (fci->format_chars, format_char) == 0)
1820 ++fci;
1821 if (fci->format_chars == 0)
1822 {
84166705 1823 if (ISGRAPH (format_char))
6bf97f82 1824 warning (OPT_Wformat, "unknown conversion type character %qc in format",
0144d886 1825 format_char);
1826 else
6bf97f82 1827 warning (OPT_Wformat, "unknown conversion type character 0x%x in format",
0144d886 1828 format_char);
1829 continue;
1830 }
1831 if (pedantic)
1832 {
1833 if (ADJ_STD (fci->std) > C_STD_VER)
6bf97f82 1834 warning (OPT_Wformat, "%s does not support the %<%%%c%> %s format",
1b1f2444 1835 C_STD_NAME (fci->std), format_char, fki->name);
0144d886 1836 }
1837
1838 /* Validate the individual flags used, removing any that are invalid. */
1839 {
1840 int d = 0;
1841 for (i = 0; flag_chars[i] != 0; i++)
1842 {
1843 const format_flag_spec *s = get_flag_spec (flag_specs,
1844 flag_chars[i], NULL);
1845 flag_chars[i - d] = flag_chars[i];
1846 if (flag_chars[i] == fki->length_code_char)
1847 continue;
1848 if (strchr (fci->flag_chars, flag_chars[i]) == 0)
1849 {
6bf97f82 1850 warning (OPT_Wformat, "%s used with %<%%%c%> %s format",
1b1f2444 1851 _(s->name), format_char, fki->name);
0144d886 1852 d++;
1853 continue;
1854 }
1855 if (pedantic)
1856 {
1857 const format_flag_spec *t;
1858 if (ADJ_STD (s->std) > C_STD_VER)
6bf97f82 1859 warning (OPT_Wformat, "%s does not support %s",
1b1f2444 1860 C_STD_NAME (s->std), _(s->long_name));
0144d886 1861 t = get_flag_spec (flag_specs, flag_chars[i], fci->flags2);
1862 if (t != NULL && ADJ_STD (t->std) > ADJ_STD (s->std))
1863 {
1864 const char *long_name = (t->long_name != NULL
1865 ? t->long_name
1866 : s->long_name);
1867 if (ADJ_STD (t->std) > C_STD_VER)
6bf97f82 1868 warning (OPT_Wformat,
1869 "%s does not support %s with the %<%%%c%> %s format",
1b1f2444 1870 C_STD_NAME (t->std), _(long_name),
1871 format_char, fki->name);
0144d886 1872 }
1873 }
1874 }
1875 flag_chars[i - d] = 0;
1876 }
1877
0fd4500a 1878 if ((fki->flags & (int) FMT_FLAG_SCANF_A_KLUDGE)
0144d886 1879 && strchr (flag_chars, 'a') != 0)
1880 aflag = 1;
1881
1882 if (fki->suppression_char
1883 && strchr (flag_chars, fki->suppression_char) != 0)
1884 suppressed = 1;
1885
1886 /* Validate the pairs of flags used. */
1887 for (i = 0; bad_flag_pairs[i].flag_char1 != 0; i++)
1888 {
1889 const format_flag_spec *s, *t;
1890 if (strchr (flag_chars, bad_flag_pairs[i].flag_char1) == 0)
1891 continue;
1892 if (strchr (flag_chars, bad_flag_pairs[i].flag_char2) == 0)
1893 continue;
1894 if (bad_flag_pairs[i].predicate != 0
1895 && strchr (fci->flags2, bad_flag_pairs[i].predicate) == 0)
1896 continue;
1897 s = get_flag_spec (flag_specs, bad_flag_pairs[i].flag_char1, NULL);
1898 t = get_flag_spec (flag_specs, bad_flag_pairs[i].flag_char2, NULL);
1899 if (bad_flag_pairs[i].ignored)
1900 {
1901 if (bad_flag_pairs[i].predicate != 0)
6bf97f82 1902 warning (OPT_Wformat,
1903 "%s ignored with %s and %<%%%c%> %s format",
1b1f2444 1904 _(s->name), _(t->name), format_char,
1905 fki->name);
0144d886 1906 else
6bf97f82 1907 warning (OPT_Wformat, "%s ignored with %s in %s format",
1b1f2444 1908 _(s->name), _(t->name), fki->name);
0144d886 1909 }
1910 else
1911 {
1912 if (bad_flag_pairs[i].predicate != 0)
6bf97f82 1913 warning (OPT_Wformat,
1914 "use of %s and %s together with %<%%%c%> %s format",
1b1f2444 1915 _(s->name), _(t->name), format_char,
1916 fki->name);
0144d886 1917 else
6bf97f82 1918 warning (OPT_Wformat, "use of %s and %s together in %s format",
1b1f2444 1919 _(s->name), _(t->name), fki->name);
0144d886 1920 }
1921 }
1922
1923 /* Give Y2K warnings. */
1924 if (warn_format_y2k)
1925 {
1926 int y2k_level = 0;
1927 if (strchr (fci->flags2, '4') != 0)
1928 if (strchr (flag_chars, 'E') != 0)
1929 y2k_level = 3;
1930 else
1931 y2k_level = 2;
1932 else if (strchr (fci->flags2, '3') != 0)
1933 y2k_level = 3;
1934 else if (strchr (fci->flags2, '2') != 0)
1935 y2k_level = 2;
1936 if (y2k_level == 3)
6bf97f82 1937 warning (OPT_Wformat_y2k, "%<%%%c%> yields only last 2 digits of "
1938 "year in some locales", format_char);
0144d886 1939 else if (y2k_level == 2)
6bf97f82 1940 warning (OPT_Wformat_y2k, "%<%%%c%> yields only last 2 digits of "
1941 "year", format_char);
0144d886 1942 }
1943
1944 if (strchr (fci->flags2, '[') != 0)
1945 {
1946 /* Skip over scan set, in case it happens to have '%' in it. */
1947 if (*format_chars == '^')
1948 ++format_chars;
1949 /* Find closing bracket; if one is hit immediately, then
1950 it's part of the scan set rather than a terminator. */
1951 if (*format_chars == ']')
1952 ++format_chars;
1953 while (*format_chars && *format_chars != ']')
1954 ++format_chars;
1955 if (*format_chars != ']')
1956 /* The end of the format string was reached. */
6bf97f82 1957 warning (OPT_Wformat, "no closing %<]%> for %<%%[%> format");
0144d886 1958 }
1959
1960 wanted_type = 0;
1961 wanted_type_name = 0;
0fd4500a 1962 if (fki->flags & (int) FMT_FLAG_ARG_CONVERT)
0144d886 1963 {
1964 wanted_type = (fci->types[length_chars_val].type
1965 ? *fci->types[length_chars_val].type : 0);
1966 wanted_type_name = fci->types[length_chars_val].name;
1967 wanted_type_std = fci->types[length_chars_val].std;
1968 if (wanted_type == 0)
1969 {
6bf97f82 1970 warning (OPT_Wformat,
1971 "use of %qs length modifier with %qc type character",
1b1f2444 1972 length_chars, format_char);
0144d886 1973 /* Heuristic: skip one argument when an invalid length/type
1974 combination is encountered. */
1975 arg_num++;
1976 if (params == 0)
1977 {
6bf97f82 1978 warning (OPT_Wformat, "too few arguments for format");
0144d886 1979 return;
1980 }
1981 params = TREE_CHAIN (params);
1982 continue;
1983 }
1984 else if (pedantic
1985 /* Warn if non-standard, provided it is more non-standard
1986 than the length and type characters that may already
1987 have been warned for. */
1988 && ADJ_STD (wanted_type_std) > ADJ_STD (length_chars_std)
1989 && ADJ_STD (wanted_type_std) > ADJ_STD (fci->std))
1990 {
1991 if (ADJ_STD (wanted_type_std) > C_STD_VER)
6bf97f82 1992 warning (OPT_Wformat,
1993 "%s does not support the %<%%%s%c%> %s format",
1b1f2444 1994 C_STD_NAME (wanted_type_std), length_chars,
1995 format_char, fki->name);
0144d886 1996 }
1997 }
1998
1e9af880 1999 main_wanted_type.next = NULL;
2000
0144d886 2001 /* Finally. . .check type of argument against desired type! */
2002 if (info->first_arg_num == 0)
2003 continue;
2004 if ((fci->pointer_count == 0 && wanted_type == void_type_node)
2005 || suppressed)
2006 {
2007 if (main_arg_num != 0)
2008 {
2009 if (suppressed)
6bf97f82 2010 warning (OPT_Wformat, "operand number specified with "
2011 "suppressed assignment");
0144d886 2012 else
6bf97f82 2013 warning (OPT_Wformat, "operand number specified for format "
2014 "taking no argument");
0144d886 2015 }
2016 }
2017 else
2018 {
1e9af880 2019 format_wanted_type *wanted_type_ptr;
2020
0144d886 2021 if (main_arg_num != 0)
2022 {
2023 arg_num = main_arg_num;
2024 params = main_arg_params;
2025 }
2026 else
2027 {
2028 ++arg_num;
2029 if (has_operand_number > 0)
2030 {
6bf97f82 2031 warning (OPT_Wformat, "missing $ operand number in format");
0144d886 2032 return;
2033 }
2034 else
2035 has_operand_number = 0;
1e9af880 2036 }
2037
2038 wanted_type_ptr = &main_wanted_type;
2039 while (fci)
2040 {
0144d886 2041 if (params == 0)
2042 {
6bf97f82 2043 warning (OPT_Wformat, "too few arguments for format");
0144d886 2044 return;
2045 }
1e9af880 2046
2047 cur_param = TREE_VALUE (params);
2048 params = TREE_CHAIN (params);
2049
2050 wanted_type_ptr->wanted_type = wanted_type;
2051 wanted_type_ptr->wanted_type_name = wanted_type_name;
2052 wanted_type_ptr->pointer_count = fci->pointer_count + aflag;
2053 wanted_type_ptr->char_lenient_flag = 0;
2054 if (strchr (fci->flags2, 'c') != 0)
2055 wanted_type_ptr->char_lenient_flag = 1;
2056 wanted_type_ptr->writing_in_flag = 0;
2057 wanted_type_ptr->reading_from_flag = 0;
2058 if (aflag)
2059 wanted_type_ptr->writing_in_flag = 1;
2060 else
2061 {
2062 if (strchr (fci->flags2, 'W') != 0)
2063 wanted_type_ptr->writing_in_flag = 1;
2064 if (strchr (fci->flags2, 'R') != 0)
2065 wanted_type_ptr->reading_from_flag = 1;
2066 }
2067 wanted_type_ptr->name = NULL;
2068 wanted_type_ptr->param = cur_param;
2069 wanted_type_ptr->arg_num = arg_num;
2070 wanted_type_ptr->next = NULL;
2071 if (last_wanted_type != 0)
2072 last_wanted_type->next = wanted_type_ptr;
2073 if (first_wanted_type == 0)
2074 first_wanted_type = wanted_type_ptr;
2075 last_wanted_type = wanted_type_ptr;
2076
2077 fci = fci->chain;
2078 if (fci)
2079 {
2080 wanted_type_ptr = ggc_alloc (sizeof (main_wanted_type));
2081 arg_num++;
2082 wanted_type = *fci->types[length_chars_val].type;
2083 wanted_type_name = fci->types[length_chars_val].name;
2084 }
0144d886 2085 }
0144d886 2086 }
2087
2088 if (first_wanted_type != 0)
31266980 2089 check_format_types (first_wanted_type, format_start,
2090 format_chars - format_start);
0144d886 2091
1e9af880 2092 if (main_wanted_type.next != NULL)
2093 {
2094 format_wanted_type *wanted_type_ptr = main_wanted_type.next;
2095 while (wanted_type_ptr)
2096 {
2097 format_wanted_type *next = wanted_type_ptr->next;
2098 ggc_free (wanted_type_ptr);
2099 wanted_type_ptr = next;
2100 }
2101 }
0144d886 2102 }
2103}
2104
2105
2106/* Check the argument types from a single format conversion (possibly
2107 including width and precision arguments). */
2108static void
31266980 2109check_format_types (format_wanted_type *types, const char *format_start,
2110 int format_length)
0144d886 2111{
2112 for (; types != 0; types = types->next)
2113 {
2114 tree cur_param;
2115 tree cur_type;
2116 tree orig_cur_type;
2117 tree wanted_type;
0144d886 2118 int arg_num;
2119 int i;
2120 int char_type_flag;
2121 cur_param = types->param;
2122 cur_type = TREE_TYPE (cur_param);
2123 if (cur_type == error_mark_node)
2124 continue;
31266980 2125 orig_cur_type = cur_type;
0144d886 2126 char_type_flag = 0;
2127 wanted_type = types->wanted_type;
2128 arg_num = types->arg_num;
2129
2130 /* The following should not occur here. */
231bd014 2131 gcc_assert (wanted_type);
2132 gcc_assert (wanted_type != void_type_node || types->pointer_count);
0144d886 2133
2134 if (types->pointer_count == 0)
dc24ddbd 2135 wanted_type = lang_hooks.types.type_promotes_to (wanted_type);
0144d886 2136
31266980 2137 wanted_type = TYPE_MAIN_VARIANT (wanted_type);
2138
0144d886 2139 STRIP_NOPS (cur_param);
2140
2141 /* Check the types of any additional pointer arguments
2142 that precede the "real" argument. */
2143 for (i = 0; i < types->pointer_count; ++i)
2144 {
2145 if (TREE_CODE (cur_type) == POINTER_TYPE)
2146 {
2147 cur_type = TREE_TYPE (cur_type);
2148 if (cur_type == error_mark_node)
2149 break;
2150
2151 /* Check for writing through a NULL pointer. */
2152 if (types->writing_in_flag
2153 && i == 0
2154 && cur_param != 0
2155 && integer_zerop (cur_param))
6bf97f82 2156 warning (OPT_Wformat, "writing through null pointer "
2157 "(argument %d)", arg_num);
0144d886 2158
2159 /* Check for reading through a NULL pointer. */
2160 if (types->reading_from_flag
2161 && i == 0
2162 && cur_param != 0
2163 && integer_zerop (cur_param))
6bf97f82 2164 warning (OPT_Wformat, "reading through null pointer "
2165 "(argument %d)", arg_num);
0144d886 2166
2167 if (cur_param != 0 && TREE_CODE (cur_param) == ADDR_EXPR)
2168 cur_param = TREE_OPERAND (cur_param, 0);
2169 else
2170 cur_param = 0;
2171
2172 /* See if this is an attempt to write into a const type with
2173 scanf or with printf "%n". Note: the writing in happens
2174 at the first indirection only, if for example
2175 void * const * is passed to scanf %p; passing
2176 const void ** is simply passing an incompatible type. */
2177 if (types->writing_in_flag
2178 && i == 0
2179 && (TYPE_READONLY (cur_type)
2180 || (cur_param != 0
ce45a448 2181 && (CONSTANT_CLASS_P (cur_param)
0144d886 2182 || (DECL_P (cur_param)
2183 && TREE_READONLY (cur_param))))))
6bf97f82 2184 warning (OPT_Wformat, "writing into constant object "
2185 "(argument %d)", arg_num);
0144d886 2186
2187 /* If there are extra type qualifiers beyond the first
2188 indirection, then this makes the types technically
2189 incompatible. */
2190 if (i > 0
2191 && pedantic
2192 && (TYPE_READONLY (cur_type)
2193 || TYPE_VOLATILE (cur_type)
2194 || TYPE_RESTRICT (cur_type)))
6bf97f82 2195 warning (OPT_Wformat, "extra type qualifiers in format "
2196 "argument (argument %d)",
0144d886 2197 arg_num);
2198
2199 }
2200 else
2201 {
31266980 2202 format_type_warning (types->name, format_start, format_length,
2203 wanted_type, types->pointer_count,
2204 types->wanted_type_name, orig_cur_type,
2205 arg_num);
0144d886 2206 break;
2207 }
2208 }
2209
2210 if (i < types->pointer_count)
2211 continue;
2212
0144d886 2213 cur_type = TYPE_MAIN_VARIANT (cur_type);
2214
2215 /* Check whether the argument type is a character type. This leniency
2216 only applies to certain formats, flagged with 'c'.
2217 */
2218 if (types->char_lenient_flag)
2219 char_type_flag = (cur_type == char_type_node
2220 || cur_type == signed_char_type_node
2221 || cur_type == unsigned_char_type_node);
2222
2223 /* Check the type of the "real" argument, if there's a type we want. */
f6f70456 2224 if (lang_hooks.types_compatible_p (wanted_type, cur_type))
0144d886 2225 continue;
eb586f2c 2226 /* If we want 'void *', allow any pointer type.
0144d886 2227 (Anything else would already have got a warning.)
2228 With -pedantic, only allow pointers to void and to character
2229 types. */
2230 if (wanted_type == void_type_node
2231 && (!pedantic || (i == 1 && char_type_flag)))
2232 continue;
2233 /* Don't warn about differences merely in signedness, unless
2234 -pedantic. With -pedantic, warn if the type is a pointer
2235 target and not a character type, and for character types at
2236 a second level of indirection. */
2237 if (TREE_CODE (wanted_type) == INTEGER_TYPE
2238 && TREE_CODE (cur_type) == INTEGER_TYPE
84166705 2239 && (!pedantic || i == 0 || (i == 1 && char_type_flag))
78a8ed03 2240 && (TYPE_UNSIGNED (wanted_type)
4070745f 2241 ? wanted_type == c_common_unsigned_type (cur_type)
2242 : wanted_type == c_common_signed_type (cur_type)))
0144d886 2243 continue;
2244 /* Likewise, "signed char", "unsigned char" and "char" are
2245 equivalent but the above test won't consider them equivalent. */
2246 if (wanted_type == char_type_node
84166705 2247 && (!pedantic || i < 2)
0144d886 2248 && char_type_flag)
2249 continue;
2250 /* Now we have a type mismatch. */
31266980 2251 format_type_warning (types->name, format_start, format_length,
2252 wanted_type, types->pointer_count,
2253 types->wanted_type_name, orig_cur_type, arg_num);
2254 }
2255}
0144d886 2256
0144d886 2257
31266980 2258/* Give a warning about a format argument of different type from that
2259 expected. DESCR is a description such as "field precision", or
2260 NULL for an ordinary format. For an ordinary format, FORMAT_START
2261 points to where the format starts in the format string and
2262 FORMAT_LENGTH is its length. WANTED_TYPE is the type the argument
2263 should have after POINTER_COUNT pointer dereferences.
2264 WANTED_NAME_NAME is a possibly more friendly name of WANTED_TYPE,
2265 or NULL if the ordinary name of the type should be used. ARG_TYPE
2266 is the type of the actual argument. ARG_NUM is the number of that
2267 argument. */
2268static void
2269format_type_warning (const char *descr, const char *format_start,
2270 int format_length, tree wanted_type, int pointer_count,
2271 const char *wanted_type_name, tree arg_type, int arg_num)
2272{
2273 char *p;
2274 /* If ARG_TYPE is a typedef with a misleading name (for example,
2275 size_t but not the standard size_t expected by printf %zu), avoid
2276 printing the typedef name. */
2277 if (wanted_type_name
2278 && TYPE_NAME (arg_type)
2279 && TREE_CODE (TYPE_NAME (arg_type)) == TYPE_DECL
2280 && DECL_NAME (TYPE_NAME (arg_type))
2281 && !strcmp (wanted_type_name,
2282 lang_hooks.decl_printable_name (TYPE_NAME (arg_type), 2)))
2283 arg_type = TYPE_MAIN_VARIANT (arg_type);
2284 /* The format type and name exclude any '*' for pointers, so those
2285 must be formatted manually. For all the types we currently have,
2286 this is adequate, but formats taking pointers to functions or
2287 arrays would require the full type to be built up in order to
2288 print it with %T. */
2289 p = alloca (pointer_count + 2);
2290 if (pointer_count == 0)
2291 p[0] = 0;
2292 else if (c_dialect_cxx ())
2293 {
2294 memset (p, '*', pointer_count);
2295 p[pointer_count] = 0;
2296 }
2297 else
2298 {
2299 p[0] = ' ';
2300 memset (p + 1, '*', pointer_count);
2301 p[pointer_count + 1] = 0;
2302 }
2303 if (wanted_type_name)
2304 {
2305 if (descr)
6bf97f82 2306 warning (OPT_Wformat, "%s should have type %<%s%s%>, "
2307 "but argument %d has type %qT",
31266980 2308 descr, wanted_type_name, p, arg_num, arg_type);
2309 else
6bf97f82 2310 warning (OPT_Wformat, "format %q.*s expects type %<%s%s%>, "
2311 "but argument %d has type %qT",
31266980 2312 format_length, format_start, wanted_type_name, p,
2313 arg_num, arg_type);
2314 }
2315 else
2316 {
2317 if (descr)
6bf97f82 2318 warning (OPT_Wformat, "%s should have type %<%T%s%>, "
2319 "but argument %d has type %qT",
31266980 2320 descr, wanted_type, p, arg_num, arg_type);
2321 else
6bf97f82 2322 warning (OPT_Wformat, "format %q.*s expects type %<%T%s%>, "
2323 "but argument %d has type %qT",
31266980 2324 format_length, format_start, wanted_type, p, arg_num, arg_type);
0144d886 2325 }
2326}
c54d077b 2327
31266980 2328
3e038b9d 2329/* Given a format_char_info array FCI, and a character C, this function
2330 returns the index into the conversion_specs where that specifier's
89f18f73 2331 data is located. The character must exist. */
3e038b9d 2332static unsigned int
2333find_char_info_specifier_index (const format_char_info *fci, int c)
2334{
231bd014 2335 unsigned i;
2336
2337 for (i = 0; fci->format_chars; i++, fci++)
2338 if (strchr (fci->format_chars, c))
2339 return i;
3e038b9d 2340
2341 /* We shouldn't be looking for a non-existent specifier. */
231bd014 2342 gcc_unreachable ();
3e038b9d 2343}
2344
3dc4d00f 2345/* Given a format_length_info array FLI, and a character C, this
2346 function returns the index into the conversion_specs where that
89f18f73 2347 modifier's data is located. The character must exist. */
3dc4d00f 2348static unsigned int
2349find_length_info_modifier_index (const format_length_info *fli, int c)
2350{
231bd014 2351 unsigned i;
2352
2353 for (i = 0; fli->name; i++, fli++)
2354 if (strchr (fli->name, c))
2355 return i;
3dc4d00f 2356
2357 /* We shouldn't be looking for a non-existent modifier. */
231bd014 2358 gcc_unreachable ();
3dc4d00f 2359}
2360
2361/* Determine the type of HOST_WIDE_INT in the code being compiled for
2362 use in GCC's __asm_fprintf__ custom format attribute. You must
2363 have set dynamic_format_types before calling this function. */
2364static void
2365init_dynamic_asm_fprintf_info (void)
2366{
2367 static tree hwi;
231bd014 2368
3dc4d00f 2369 if (!hwi)
2370 {
2371 format_length_info *new_asm_fprintf_length_specs;
2372 unsigned int i;
2373
2374 /* Find the underlying type for HOST_WIDE_INT. For the %w
2375 length modifier to work, one must have issued: "typedef
2376 HOST_WIDE_INT __gcc_host_wide_int__;" in one's source code
2377 prior to using that modifier. */
231bd014 2378 hwi = maybe_get_identifier ("__gcc_host_wide_int__");
58db2592 2379 if (!hwi)
2380 {
2381 error ("%<__gcc_host_wide_int__%> is not defined as a type");
2382 return;
2383 }
2384 hwi = identifier_global_value (hwi);
2385 if (!hwi || TREE_CODE (hwi) != TYPE_DECL)
2386 {
2387 error ("%<__gcc_host_wide_int__%> is not defined as a type");
2388 return;
2389 }
2390 hwi = DECL_ORIGINAL_TYPE (hwi);
231bd014 2391 gcc_assert (hwi);
58db2592 2392 if (hwi != long_integer_type_node && hwi != long_long_integer_type_node)
2393 {
2394 error ("%<__gcc_host_wide_int__%> is not defined as %<long%>"
2395 " or %<long long%>");
2396 return;
2397 }
3dc4d00f 2398
2399 /* Create a new (writable) copy of asm_fprintf_length_specs. */
4fd61bc6 2400 new_asm_fprintf_length_specs = (format_length_info *)
2401 xmemdup (asm_fprintf_length_specs,
3dc4d00f 2402 sizeof (asm_fprintf_length_specs),
2403 sizeof (asm_fprintf_length_specs));
2404
2405 /* HOST_WIDE_INT must be one of 'long' or 'long long'. */
2406 i = find_length_info_modifier_index (new_asm_fprintf_length_specs, 'w');
2407 if (hwi == long_integer_type_node)
2408 new_asm_fprintf_length_specs[i].index = FMT_LEN_l;
2409 else if (hwi == long_long_integer_type_node)
2410 new_asm_fprintf_length_specs[i].index = FMT_LEN_ll;
2411 else
231bd014 2412 gcc_unreachable ();
3dc4d00f 2413
2414 /* Assign the new data for use. */
2415 dynamic_format_types[asm_fprintf_format_type].length_char_specs =
2416 new_asm_fprintf_length_specs;
2417 }
2418}
2419
bbec950d 2420/* Determine the type of a "locus" in the code being compiled for use
2421 in GCC's __gcc_gfc__ custom format attribute. You must have set
2422 dynamic_format_types before calling this function. */
2423static void
2424init_dynamic_gfc_info (void)
2425{
2426 static tree locus;
2427
2428 if (!locus)
2429 {
2430 static format_char_info *gfc_fci;
2431
2432 /* For the GCC __gcc_gfc__ custom format specifier to work, one
2433 must have declared 'locus' prior to using this attribute. If
2434 we haven't seen this declarations then you shouldn't use the
2435 specifier requiring that type. */
2436 if ((locus = maybe_get_identifier ("locus")))
2437 {
2438 locus = identifier_global_value (locus);
2439 if (locus)
2440 {
2441 if (TREE_CODE (locus) != TYPE_DECL)
2442 {
2443 error ("%<locus%> is not defined as a type");
2444 locus = 0;
2445 }
2446 else
2447 locus = TREE_TYPE (locus);
2448 }
2449 }
2450
2451 /* Assign the new data for use. */
2452
2453 /* Handle the __gcc_gfc__ format specifics. */
2454 if (!gfc_fci)
2455 dynamic_format_types[gcc_gfc_format_type].conversion_specs =
2456 gfc_fci = (format_char_info *)
2457 xmemdup (gcc_gfc_char_table,
2458 sizeof (gcc_gfc_char_table),
2459 sizeof (gcc_gfc_char_table));
2460 if (locus)
2461 {
2462 const unsigned i = find_char_info_specifier_index (gfc_fci, 'L');
2463 gfc_fci[i].types[0].type = &locus;
2464 gfc_fci[i].pointer_count = 1;
2465 }
2466 }
2467}
2468
3e038b9d 2469/* Determine the types of "tree" and "location_t" in the code being
2470 compiled for use in GCC's diagnostic custom format attributes. You
2471 must have set dynamic_format_types before calling this function. */
2472static void
2473init_dynamic_diag_info (void)
2474{
2475 static tree t, loc, hwi;
4fd61bc6 2476
3e038b9d 2477 if (!loc || !t || !hwi)
2478 {
7781aa77 2479 static format_char_info *diag_fci, *tdiag_fci, *cdiag_fci, *cxxdiag_fci;
3e038b9d 2480 static format_length_info *diag_ls;
2481 unsigned int i;
2482
2483 /* For the GCC-diagnostics custom format specifiers to work, one
eb586f2c 2484 must have declared 'tree' and/or 'location_t' prior to using
3e038b9d 2485 those attributes. If we haven't seen these declarations then
2486 you shouldn't use the specifiers requiring these types.
2487 However we don't force a hard ICE because we may see only one
2488 or the other type. */
2489 if ((loc = maybe_get_identifier ("location_t")))
58db2592 2490 {
2491 loc = identifier_global_value (loc);
2492 if (loc)
2493 {
2494 if (TREE_CODE (loc) != TYPE_DECL)
2495 {
2496 error ("%<location_t%> is not defined as a type");
2497 loc = 0;
2498 }
2499 else
2500 loc = TREE_TYPE (loc);
2501 }
2502 }
3e038b9d 2503
eb586f2c 2504 /* We need to grab the underlying 'union tree_node' so peek into
3e038b9d 2505 an extra type level. */
2506 if ((t = maybe_get_identifier ("tree")))
58db2592 2507 {
2508 t = identifier_global_value (t);
2509 if (t)
2510 {
2511 if (TREE_CODE (t) != TYPE_DECL)
2512 {
2513 error ("%<tree%> is not defined as a type");
2514 t = 0;
2515 }
2516 else if (TREE_CODE (TREE_TYPE (t)) != POINTER_TYPE)
2517 {
2518 error ("%<tree%> is not defined as a pointer type");
2519 t = 0;
2520 }
2521 else
2522 t = TREE_TYPE (TREE_TYPE (t));
2523 }
2524 }
3e038b9d 2525
2526 /* Find the underlying type for HOST_WIDE_INT. For the %w
2527 length modifier to work, one must have issued: "typedef
2528 HOST_WIDE_INT __gcc_host_wide_int__;" in one's source code
2529 prior to using that modifier. */
2530 if ((hwi = maybe_get_identifier ("__gcc_host_wide_int__")))
58db2592 2531 {
2532 hwi = identifier_global_value (hwi);
2533 if (hwi)
2534 {
2535 if (TREE_CODE (hwi) != TYPE_DECL)
2536 {
2537 error ("%<__gcc_host_wide_int__%> is not defined as a type");
2538 hwi = 0;
2539 }
2540 else
2541 {
2542 hwi = DECL_ORIGINAL_TYPE (hwi);
2543 gcc_assert (hwi);
2544 if (hwi != long_integer_type_node
2545 && hwi != long_long_integer_type_node)
2546 {
2547 error ("%<__gcc_host_wide_int__%> is not defined"
2548 " as %<long%> or %<long long%>");
2549 hwi = 0;
2550 }
2551 }
2552 }
2553 }
3e038b9d 2554
2555 /* Assign the new data for use. */
2556
2557 /* All the GCC diag formats use the same length specs. */
84166705 2558 if (!diag_ls)
3e038b9d 2559 dynamic_format_types[gcc_diag_format_type].length_char_specs =
7781aa77 2560 dynamic_format_types[gcc_tdiag_format_type].length_char_specs =
3e038b9d 2561 dynamic_format_types[gcc_cdiag_format_type].length_char_specs =
2562 dynamic_format_types[gcc_cxxdiag_format_type].length_char_specs =
4fd61bc6 2563 diag_ls = (format_length_info *)
2564 xmemdup (gcc_diag_length_specs,
3e038b9d 2565 sizeof (gcc_diag_length_specs),
2566 sizeof (gcc_diag_length_specs));
2567 if (hwi)
2568 {
2569 /* HOST_WIDE_INT must be one of 'long' or 'long long'. */
2570 i = find_length_info_modifier_index (diag_ls, 'w');
2571 if (hwi == long_integer_type_node)
2572 diag_ls[i].index = FMT_LEN_l;
2573 else if (hwi == long_long_integer_type_node)
2574 diag_ls[i].index = FMT_LEN_ll;
2575 else
231bd014 2576 gcc_unreachable ();
3e038b9d 2577 }
2578
2579 /* Handle the __gcc_diag__ format specifics. */
84166705 2580 if (!diag_fci)
3e038b9d 2581 dynamic_format_types[gcc_diag_format_type].conversion_specs =
4fd61bc6 2582 diag_fci = (format_char_info *)
2583 xmemdup (gcc_diag_char_table,
84166705 2584 sizeof (gcc_diag_char_table),
2585 sizeof (gcc_diag_char_table));
3e038b9d 2586 if (loc)
2587 {
2588 i = find_char_info_specifier_index (diag_fci, 'H');
2589 diag_fci[i].types[0].type = &loc;
2590 diag_fci[i].pointer_count = 1;
2591 }
9bc3739f 2592 if (t)
2593 {
2594 i = find_char_info_specifier_index (diag_fci, 'J');
2595 diag_fci[i].types[0].type = &t;
2596 diag_fci[i].pointer_count = 1;
2597 }
3e038b9d 2598
7781aa77 2599 /* Handle the __gcc_tdiag__ format specifics. */
2600 if (!tdiag_fci)
2601 dynamic_format_types[gcc_tdiag_format_type].conversion_specs =
2602 tdiag_fci = (format_char_info *)
2603 xmemdup (gcc_tdiag_char_table,
2604 sizeof (gcc_tdiag_char_table),
2605 sizeof (gcc_tdiag_char_table));
2606 if (loc)
2607 {
2608 i = find_char_info_specifier_index (tdiag_fci, 'H');
2609 tdiag_fci[i].types[0].type = &loc;
2610 tdiag_fci[i].pointer_count = 1;
2611 }
2612 if (t)
2613 {
2614 /* All specifiers taking a tree share the same struct. */
2615 i = find_char_info_specifier_index (tdiag_fci, 'D');
2616 tdiag_fci[i].types[0].type = &t;
2617 tdiag_fci[i].pointer_count = 1;
2618 i = find_char_info_specifier_index (tdiag_fci, 'J');
2619 tdiag_fci[i].types[0].type = &t;
2620 tdiag_fci[i].pointer_count = 1;
2621 }
2622
3e038b9d 2623 /* Handle the __gcc_cdiag__ format specifics. */
84166705 2624 if (!cdiag_fci)
3e038b9d 2625 dynamic_format_types[gcc_cdiag_format_type].conversion_specs =
4fd61bc6 2626 cdiag_fci = (format_char_info *)
2627 xmemdup (gcc_cdiag_char_table,
84166705 2628 sizeof (gcc_cdiag_char_table),
2629 sizeof (gcc_cdiag_char_table));
3e038b9d 2630 if (loc)
2631 {
2632 i = find_char_info_specifier_index (cdiag_fci, 'H');
2633 cdiag_fci[i].types[0].type = &loc;
2634 cdiag_fci[i].pointer_count = 1;
2635 }
2636 if (t)
2637 {
81d47035 2638 /* All specifiers taking a tree share the same struct. */
3e038b9d 2639 i = find_char_info_specifier_index (cdiag_fci, 'D');
2640 cdiag_fci[i].types[0].type = &t;
2641 cdiag_fci[i].pointer_count = 1;
9bc3739f 2642 i = find_char_info_specifier_index (cdiag_fci, 'J');
2643 cdiag_fci[i].types[0].type = &t;
2644 cdiag_fci[i].pointer_count = 1;
3e038b9d 2645 }
2646
2647 /* Handle the __gcc_cxxdiag__ format specifics. */
84166705 2648 if (!cxxdiag_fci)
3e038b9d 2649 dynamic_format_types[gcc_cxxdiag_format_type].conversion_specs =
4fd61bc6 2650 cxxdiag_fci = (format_char_info *)
2651 xmemdup (gcc_cxxdiag_char_table,
84166705 2652 sizeof (gcc_cxxdiag_char_table),
2653 sizeof (gcc_cxxdiag_char_table));
3e038b9d 2654 if (loc)
2655 {
2656 i = find_char_info_specifier_index (cxxdiag_fci, 'H');
2657 cxxdiag_fci[i].types[0].type = &loc;
2658 cxxdiag_fci[i].pointer_count = 1;
2659 }
2660 if (t)
2661 {
81d47035 2662 /* All specifiers taking a tree share the same struct. */
3e038b9d 2663 i = find_char_info_specifier_index (cxxdiag_fci, 'D');
2664 cxxdiag_fci[i].types[0].type = &t;
2665 cxxdiag_fci[i].pointer_count = 1;
9bc3739f 2666 i = find_char_info_specifier_index (cxxdiag_fci, 'J');
2667 cxxdiag_fci[i].types[0].type = &t;
2668 cxxdiag_fci[i].pointer_count = 1;
3e038b9d 2669 }
2670 }
2671}
2672
1e9af880 2673#ifdef TARGET_FORMAT_TYPES
2674extern const format_kind_info TARGET_FORMAT_TYPES[];
2675#endif
2676
c54d077b 2677/* Handle a "format" attribute; arguments as in
2678 struct attribute_spec.handler. */
2679tree
9a03a746 2680handle_format_attribute (tree *node, tree ARG_UNUSED (name), tree args,
d19a6ea0 2681 int flags, bool *no_add_attrs)
c54d077b 2682{
2683 tree type = *node;
2684 function_format_info info;
2685 tree argument;
c54d077b 2686
1e9af880 2687#ifdef TARGET_FORMAT_TYPES
2688 /* If the target provides additional format types, we need to
2689 add them to FORMAT_TYPES at first use. */
2690 if (TARGET_FORMAT_TYPES != NULL && !dynamic_format_types)
2691 {
2692 dynamic_format_types = xmalloc ((n_format_types + TARGET_N_FORMAT_TYPES)
2693 * sizeof (dynamic_format_types[0]));
2694 memcpy (dynamic_format_types, format_types_orig,
2695 sizeof (format_types_orig));
2696 memcpy (&dynamic_format_types[n_format_types], TARGET_FORMAT_TYPES,
2697 TARGET_N_FORMAT_TYPES * sizeof (dynamic_format_types[0]));
2698
2699 format_types = dynamic_format_types;
2700 n_format_types += TARGET_N_FORMAT_TYPES;
2701 }
2702#endif
2703
c54d077b 2704 if (!decode_format_attr (args, &info, 0))
2705 {
2706 *no_add_attrs = true;
2707 return NULL_TREE;
2708 }
2709
c54d077b 2710 argument = TYPE_ARG_TYPES (type);
2711 if (argument)
2712 {
0a1f0a0f 2713 if (!check_format_string (argument, info.format_num, flags,
2714 no_add_attrs))
2715 return NULL_TREE;
c54d077b 2716
0a1f0a0f 2717 if (info.first_arg_num != 0)
c54d077b 2718 {
0a1f0a0f 2719 unsigned HOST_WIDE_INT arg_num = 1;
2720
c54d077b 2721 /* Verify that first_arg_num points to the last arg,
2722 the ... */
2723 while (argument)
2724 arg_num++, argument = TREE_CHAIN (argument);
2725
2726 if (arg_num != info.first_arg_num)
2727 {
2728 if (!(flags & (int) ATTR_FLAG_BUILT_IN))
1e5fcbe2 2729 error ("args to be formatted is not %<...%>");
c54d077b 2730 *no_add_attrs = true;
2731 return NULL_TREE;
2732 }
2733 }
2734 }
2735
2736 if (info.format_type == strftime_format_type && info.first_arg_num != 0)
2737 {
2738 error ("strftime formats cannot format arguments");
2739 *no_add_attrs = true;
2740 return NULL_TREE;
2741 }
2742
3e038b9d 2743 /* If this is a custom GCC-internal format type, we have to
2744 initialize certain bits a runtime. */
2745 if (info.format_type == asm_fprintf_format_type
bbec950d 2746 || info.format_type == gcc_gfc_format_type
3e038b9d 2747 || info.format_type == gcc_diag_format_type
7781aa77 2748 || info.format_type == gcc_tdiag_format_type
3e038b9d 2749 || info.format_type == gcc_cdiag_format_type
2750 || info.format_type == gcc_cxxdiag_format_type)
c54d077b 2751 {
3dc4d00f 2752 /* Our first time through, we have to make sure that our
2753 format_type data is allocated dynamically and is modifiable. */
2754 if (!dynamic_format_types)
4fd61bc6 2755 format_types = dynamic_format_types = (format_kind_info *)
3dc4d00f 2756 xmemdup (format_types_orig, sizeof (format_types_orig),
2757 sizeof (format_types_orig));
2758
3e038b9d 2759 /* If this is format __asm_fprintf__, we have to initialize
2760 GCC's notion of HOST_WIDE_INT for checking %wd. */
2761 if (info.format_type == asm_fprintf_format_type)
84166705 2762 init_dynamic_asm_fprintf_info ();
bbec950d 2763 /* If this is format __gcc_gfc__, we have to initialize GCC's
2764 notion of 'locus' at runtime for %L. */
2765 else if (info.format_type == gcc_gfc_format_type)
2766 init_dynamic_gfc_info ();
3e038b9d 2767 /* If this is one of the diagnostic attributes, then we have to
eb586f2c 2768 initialize 'location_t' and 'tree' at runtime. */
3e038b9d 2769 else if (info.format_type == gcc_diag_format_type
7781aa77 2770 || info.format_type == gcc_tdiag_format_type
3e038b9d 2771 || info.format_type == gcc_cdiag_format_type
2772 || info.format_type == gcc_cxxdiag_format_type)
84166705 2773 init_dynamic_diag_info ();
3e038b9d 2774 else
84166705 2775 gcc_unreachable ();
c54d077b 2776 }
2777
2778 return NULL_TREE;
2779}
Mirror of https://gcc.gnu.org/git/gcc.git