2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
23 #include "diagnostic.h"
25 #include "attribute_t.h"
27 #include "adt/error.h"
30 static const char *const attribute_names[ATTRIBUTE_LAST+1] = {
31 [ATTRIBUTE_GNU_CONST] = "const",
32 [ATTRIBUTE_GNU_VOLATILE] = "volatile",
33 [ATTRIBUTE_GNU_CDECL] = "cdecl",
34 [ATTRIBUTE_GNU_STDCALL] = "stdcall",
35 [ATTRIBUTE_GNU_FASTCALL] = "fastcall",
36 [ATTRIBUTE_GNU_DEPRECATED] = "deprecated",
37 [ATTRIBUTE_GNU_NOINLINE] = "noinline",
38 [ATTRIBUTE_GNU_RETURNS_TWICE] = "returns_twice",
39 [ATTRIBUTE_GNU_NORETURN] = "noreturn",
40 [ATTRIBUTE_GNU_NAKED] = "naked",
41 [ATTRIBUTE_GNU_PURE] = "pure",
42 [ATTRIBUTE_GNU_ALWAYS_INLINE] = "always_inline",
43 [ATTRIBUTE_GNU_MALLOC] = "malloc",
44 [ATTRIBUTE_GNU_WEAK] = "weak",
45 [ATTRIBUTE_GNU_CONSTRUCTOR] = "constructor",
46 [ATTRIBUTE_GNU_DESTRUCTOR] = "destructor",
47 [ATTRIBUTE_GNU_NOTHROW] = "nothrow",
48 [ATTRIBUTE_GNU_TRANSPARENT_UNION] = "transparent_union",
49 [ATTRIBUTE_GNU_COMMON] = "common",
50 [ATTRIBUTE_GNU_NOCOMMON] = "nocommon",
51 [ATTRIBUTE_GNU_PACKED] = "packed",
52 [ATTRIBUTE_GNU_SHARED] = "shared",
53 [ATTRIBUTE_GNU_NOTSHARED] = "notshared",
54 [ATTRIBUTE_GNU_USED] = "used",
55 [ATTRIBUTE_GNU_UNUSED] = "unused",
56 [ATTRIBUTE_GNU_NO_INSTRUMENT_FUNCTION] = "no_instrument_function",
57 [ATTRIBUTE_GNU_WARN_UNUSED_RESULT] = "warn_unused_result",
58 [ATTRIBUTE_GNU_LONGCALL] = "longcall",
59 [ATTRIBUTE_GNU_SHORTCALL] = "shortcall",
60 [ATTRIBUTE_GNU_LONG_CALL] = "long_call",
61 [ATTRIBUTE_GNU_SHORT_CALL] = "short_call",
62 [ATTRIBUTE_GNU_FUNCTION_VECTOR] = "function_vector",
63 [ATTRIBUTE_GNU_INTERRUPT] = "interrupt",
64 [ATTRIBUTE_GNU_INTERRUPT_HANDLER] = "interrupt_handler",
65 [ATTRIBUTE_GNU_NMI_HANDLER] = "nmi_handler",
66 [ATTRIBUTE_GNU_NESTING] = "nesting",
67 [ATTRIBUTE_GNU_NEAR] = "near",
68 [ATTRIBUTE_GNU_FAR] = "far",
69 [ATTRIBUTE_GNU_SIGNAL] = "signal",
70 [ATTRIBUTE_GNU_EIGTHBIT_DATA] = "eightbit_data",
71 [ATTRIBUTE_GNU_TINY_DATA] = "tiny_data",
72 [ATTRIBUTE_GNU_SAVEALL] = "saveall",
73 [ATTRIBUTE_GNU_FLATTEN] = "flatten",
74 [ATTRIBUTE_GNU_SSEREGPARM] = "sseregparm",
75 [ATTRIBUTE_GNU_EXTERNALLY_VISIBLE] = "externally_visible",
76 [ATTRIBUTE_GNU_MAY_ALIAS] = "may_alias",
77 [ATTRIBUTE_GNU_MS_STRUCT] = "ms_struct",
78 [ATTRIBUTE_GNU_GCC_STRUCT] = "gcc_struct",
79 [ATTRIBUTE_GNU_DLLIMPORT] = "dllimport",
80 [ATTRIBUTE_GNU_DLLEXPORT] = "dllexport",
81 [ATTRIBUTE_GNU_ALIGNED] = "aligned",
82 [ATTRIBUTE_GNU_ALIAS] = "alias",
83 [ATTRIBUTE_GNU_SECTION] = "section",
84 [ATTRIBUTE_GNU_FORMAT] = "format",
85 [ATTRIBUTE_GNU_FORMAT_ARG] = "format_arg",
86 [ATTRIBUTE_GNU_WEAKREF] = "weakref",
87 [ATTRIBUTE_GNU_NONNULL] = "nonnull",
88 [ATTRIBUTE_GNU_TLS_MODEL] = "tls_model",
89 [ATTRIBUTE_GNU_VISIBILITY] = "visibility",
90 [ATTRIBUTE_GNU_REGPARM] = "regparm",
91 [ATTRIBUTE_GNU_MODE] = "mode",
92 [ATTRIBUTE_GNU_MODEL] = "model",
93 [ATTRIBUTE_GNU_TRAP_EXIT] = "trap_exit",
94 [ATTRIBUTE_GNU_SP_SWITCH] = "sp_switch",
95 [ATTRIBUTE_GNU_SENTINEL] = "sentinel",
97 [ATTRIBUTE_MS_ALIGN] = "align",
98 [ATTRIBUTE_MS_ALLOCATE] = "allocate",
99 [ATTRIBUTE_MS_DLLIMPORT] = "dllimport",
100 [ATTRIBUTE_MS_DLLEXPORT] = "dllexport",
101 [ATTRIBUTE_MS_NAKED] = "naked",
102 [ATTRIBUTE_MS_NOINLINE] = "noinline",
103 [ATTRIBUTE_MS_RETURNS_TWICE] = "returns_twice",
104 [ATTRIBUTE_MS_NORETURN] = "noreturn",
105 [ATTRIBUTE_MS_NOTHROW] = "nothrow",
106 [ATTRIBUTE_MS_NOVTABLE] = "novtable",
107 [ATTRIBUTE_MS_PROPERTY] = "property",
108 [ATTRIBUTE_MS_SELECTANY] = "selectany",
109 [ATTRIBUTE_MS_THREAD] = "thread",
110 [ATTRIBUTE_MS_UUID] = "uuid",
111 [ATTRIBUTE_MS_DEPRECATED] = "deprecated",
112 [ATTRIBUTE_MS_RESTRICT] = "restrict",
113 [ATTRIBUTE_MS_NOALIAS] = "noalias",
116 const char *get_attribute_name(attribute_kind_t kind)
118 assert(kind <= ATTRIBUTE_LAST);
119 return attribute_names[kind];
123 * compare two string, ignoring double underscores on the second.
125 static int strcmp_underscore(const char *s1, const char *s2)
127 if (s2[0] == '_' && s2[1] == '_') {
128 size_t len2 = strlen(s2);
129 size_t len1 = strlen(s1);
130 if (len1 == len2-4 && s2[len2-2] == '_' && s2[len2-1] == '_') {
131 return strncmp(s1, s2+2, len2-4);
135 return strcmp(s1, s2);
138 type_t *handle_attribute_mode(const attribute_t *attribute, type_t *orig_type)
140 type_t *type = skip_typeref(orig_type);
142 /* at least: byte, word, pointer, list of machine modes
143 * __XXX___ is interpreted as XXX */
145 /* This isn't really correct, the backend should provide a list of machine
146 * specific modes (according to gcc philosophy that is...) */
147 attribute_argument_t *arg = attribute->a.arguments;
149 errorf(&attribute->source_position,
150 "__attribute__((mode(X))) misses argument");
154 const char *symbol_str = arg->v.symbol->string;
155 bool sign = is_type_signed(type);
156 atomic_type_kind_t akind;
157 if (strcmp_underscore("QI", symbol_str) == 0 ||
158 strcmp_underscore("byte", symbol_str) == 0) {
159 akind = sign ? ATOMIC_TYPE_CHAR : ATOMIC_TYPE_UCHAR;
160 } else if (strcmp_underscore("HI", symbol_str) == 0) {
161 akind = sign ? ATOMIC_TYPE_SHORT : ATOMIC_TYPE_USHORT;
162 } else if (strcmp_underscore("SI", symbol_str) == 0
163 || strcmp_underscore("word", symbol_str) == 0
164 || strcmp_underscore("pointer", symbol_str) == 0) {
165 akind = sign ? ATOMIC_TYPE_INT : ATOMIC_TYPE_UINT;
166 } else if (strcmp_underscore("DI", symbol_str) == 0) {
167 akind = sign ? ATOMIC_TYPE_LONGLONG : ATOMIC_TYPE_ULONGLONG;
169 source_position_t const *const pos = &attribute->source_position;
170 warningf(WARN_OTHER, pos, "ignoring unknown mode '%s'", symbol_str);
174 if (type->kind == TYPE_ATOMIC || type->kind == TYPE_ENUM) {
175 type_t *copy = duplicate_type(type);
176 copy->atomic.akind = akind;
177 return identify_new_type(copy);
178 } else if (is_type_pointer(type)) {
179 source_position_t const *const pos = &attribute->source_position;
180 warningf(WARN_OTHER, pos, "__attribute__((mode)) on pointers not implemented yet (ignored)");
184 errorf(&attribute->source_position,
185 "__attribute__((mode)) only allowed on integer, enum or pointer type");
189 static inline bool is_po2(unsigned x)
191 return (x & (x-1)) == 0;
194 static void handle_attribute_aligned(const attribute_t *attribute,
197 int alignment = 32; /* TODO: fill in maximum useful alignment for
199 if (attribute->a.arguments) {
200 attribute_argument_t *argument = attribute->a.arguments;
201 alignment = fold_constant_to_int(argument->v.expression);
204 if (!is_po2(alignment)) {
205 errorf(&attribute->source_position,
206 "alignment must be a power of 2 but is %d\n",
210 if (alignment <= 0) {
211 errorf(&attribute->source_position,
212 "alignment must be bigger than 0 but is %d\n",
217 switch (entity->kind) {
218 DECLARATION_KIND_CASES
219 entity->declaration.alignment = alignment;
221 entity->typedefe.alignment = alignment;
225 if (alignment > (int)entity->compound.alignment) {
226 entity->compound.alignment = alignment;
230 source_position_t const *const pos = &attribute->source_position;
231 char const *const what = get_entity_kind_name(entity->kind);
232 symbol_t const *const sym = entity->base.symbol;
233 warningf(WARN_OTHER, pos, "alignment attribute specification on %s '%S' ignored", what, sym);
239 static const char *get_argument_string(const attribute_argument_t *argument)
241 if (argument == NULL)
243 if (argument->kind != ATTRIBUTE_ARGUMENT_EXPRESSION)
245 expression_t *expression = argument->v.expression;
246 if (expression->kind != EXPR_STRING_LITERAL)
248 return expression->literal.value.begin;
251 static void handle_attribute_visibility(const attribute_t *attribute,
254 /* This isn't really correct, the backend should provide a list of machine
255 * specific modes (according to gcc philosophy that is...) */
256 attribute_argument_t *arg = attribute->a.arguments;
258 errorf(&attribute->source_position,
259 "__attribute__((visibility(X))) misses argument");
262 const char *string = get_argument_string(arg);
263 if (string == NULL) {
264 errorf(&attribute->source_position,
265 "__attribute__((visibility(X))) argument is not a string");
268 elf_visibility_tag_t visibility = get_elf_visibility_from_string(string);
269 if (visibility == ELF_VISIBILITY_ERROR) {
270 errorf(&attribute->source_position,
271 "unknown visibility type '%s'", string);
275 switch (entity->kind) {
276 case ENTITY_VARIABLE:
277 entity->variable.elf_visibility = visibility;
279 case ENTITY_FUNCTION:
280 entity->function.elf_visibility = visibility;
283 source_position_t const *const pos = &attribute->source_position;
284 char const *const what = get_entity_kind_name(entity->kind);
285 symbol_t const *const sym = entity->base.symbol;
286 warningf(WARN_OTHER, pos, "visibility attribute specification on %s '%S' ignored", what, sym);
292 static void warn_arguments(const attribute_t *attribute)
294 if (attribute->a.arguments == NULL)
297 source_position_t const *const pos = &attribute->source_position;
298 char const *const what = get_attribute_name(attribute->kind);
299 warningf(WARN_OTHER, pos, "attribute '%s' needs no arguments", what);
302 static void handle_attribute_packed_e(const attribute_t *attribute,
306 if (entity->kind != ENTITY_STRUCT) {
307 source_position_t const *const pos = &attribute->source_position;
308 char const *const what = get_entity_kind_name(entity->kind);
309 symbol_t const *const sym = entity->base.symbol;
310 warningf(WARN_OTHER, pos, "packed attribute on %s '%S' ignored", what, sym);
315 warn_arguments(attribute);
316 entity->compound.packed = true;
319 static void handle_attribute_packed(const attribute_t *attribute, type_t *type)
321 if (type->kind != TYPE_COMPOUND_STRUCT) {
322 source_position_t const *const pos = &attribute->source_position;
323 warningf(WARN_OTHER, pos, "packed attribute on type '%T' ignored", type);
327 handle_attribute_packed_e(attribute, (entity_t*) type->compound.compound);
330 static void handle_attribute_asm(const attribute_t *attribute,
333 attribute_argument_t *argument = attribute->a.arguments;
334 assert (argument->kind == ATTRIBUTE_ARGUMENT_EXPRESSION);
335 expression_t *expression = argument->v.expression;
336 if (expression->kind != EXPR_STRING_LITERAL)
337 errorf(&attribute->source_position,
338 "Invalid asm attribute expression");
339 symbol_t *sym = symbol_table_insert(expression->string_literal.value.begin);
340 entity->function.actual_name = sym;
341 assert(argument->next == NULL);
345 void handle_entity_attributes(const attribute_t *attributes, entity_t *entity)
347 if (entity->kind == ENTITY_TYPEDEF) {
348 type_t *type = entity->typedefe.type;
349 type = handle_type_attributes(attributes, type);
350 entity->typedefe.type = type;
351 } else if (is_declaration(entity)) {
352 type_t *type = entity->declaration.type;
353 type = handle_type_attributes(attributes, type);
354 entity->declaration.type = type;
357 decl_modifiers_t modifiers = 0;
358 const attribute_t *attribute = attributes;
359 for ( ; attribute != NULL; attribute = attribute->next) {
360 switch(attribute->kind) {
361 case ATTRIBUTE_GNU_CONST: modifiers |= DM_CONST; break;
362 case ATTRIBUTE_GNU_DEPRECATED: modifiers |= DM_DEPRECATED; break;
363 case ATTRIBUTE_GNU_NOINLINE: modifiers |= DM_NOINLINE; break;
364 case ATTRIBUTE_GNU_NAKED: modifiers |= DM_NAKED; break;
365 case ATTRIBUTE_GNU_PURE: modifiers |= DM_PURE; break;
366 case ATTRIBUTE_GNU_ALWAYS_INLINE: modifiers |= DM_FORCEINLINE; break;
367 case ATTRIBUTE_GNU_CONSTRUCTOR: modifiers |= DM_CONSTRUCTOR; break;
368 case ATTRIBUTE_GNU_DESTRUCTOR: modifiers |= DM_DESTRUCTOR; break;
369 case ATTRIBUTE_GNU_TRANSPARENT_UNION:
370 modifiers |= DM_TRANSPARENT_UNION;
372 case ATTRIBUTE_GNU_USED: modifiers |= DM_USED; break;
373 case ATTRIBUTE_GNU_UNUSED: modifiers |= DM_UNUSED; break;
374 case ATTRIBUTE_GNU_DLLIMPORT: modifiers |= DM_DLLIMPORT; break;
375 case ATTRIBUTE_GNU_DLLEXPORT: modifiers |= DM_DLLEXPORT; break;
376 case ATTRIBUTE_GNU_WEAK: modifiers |= DM_WEAK; break;
378 case ATTRIBUTE_MS_DLLIMPORT: modifiers |= DM_DLLIMPORT; break;
379 case ATTRIBUTE_MS_DLLEXPORT: modifiers |= DM_DLLEXPORT; break;
380 case ATTRIBUTE_MS_NAKED: modifiers |= DM_NAKED; break;
381 case ATTRIBUTE_MS_NOINLINE: modifiers |= DM_NOINLINE; break;
382 case ATTRIBUTE_MS_THREAD: modifiers |= DM_THREAD; break;
383 case ATTRIBUTE_MS_DEPRECATED: modifiers |= DM_DEPRECATED; break;
384 case ATTRIBUTE_MS_RESTRICT: modifiers |= DM_RESTRICT; break;
385 case ATTRIBUTE_MS_NOALIAS: modifiers |= DM_NOALIAS; break;
387 case ATTRIBUTE_GNU_PACKED:
388 handle_attribute_packed_e(attribute, entity);
391 case ATTRIBUTE_GNU_ASM:
392 handle_attribute_asm(attribute, entity);
395 case ATTRIBUTE_GNU_VISIBILITY:
396 handle_attribute_visibility(attribute, entity);
399 case ATTRIBUTE_MS_ALIGN:
400 case ATTRIBUTE_GNU_ALIGNED:
401 handle_attribute_aligned(attribute, entity);
407 if (modifiers != 0) {
408 switch(entity->kind) {
410 entity->typedefe.modifiers |= modifiers;
414 entity->compound.modifiers |= modifiers;
416 case ENTITY_COMPOUND_MEMBER:
417 case ENTITY_VARIABLE:
418 case ENTITY_FUNCTION:
419 entity->declaration.modifiers |= modifiers;
428 static type_t *change_calling_convention(type_t *type, cc_kind_t cconv)
430 if (is_typeref(type) || !is_type_function(type)) {
434 if (type->function.calling_convention == cconv)
437 type_t* new_type = duplicate_type(type);
438 new_type->function.calling_convention = cconv;
439 return identify_new_type(new_type);
442 static type_t *add_modifiers(type_t *type, decl_modifiers_t modifiers)
444 if (is_typeref(type) || !is_type_function(type)) {
448 if ((type->function.modifiers & modifiers) == modifiers)
451 type_t* new_type = duplicate_type(type);
452 new_type->function.modifiers |= modifiers;
453 return identify_new_type(new_type);
456 type_t *handle_type_attributes(const attribute_t *attributes, type_t *type)
458 const attribute_t *attribute = attributes;
459 for ( ; attribute != NULL; attribute = attribute->next) {
460 switch(attribute->kind) {
461 case ATTRIBUTE_GNU_PACKED:
462 handle_attribute_packed(attribute, type);
464 case ATTRIBUTE_GNU_CDECL:
465 case ATTRIBUTE_MS_CDECL:
466 type = change_calling_convention(type, CC_CDECL);
468 case ATTRIBUTE_MS_STDCALL:
469 case ATTRIBUTE_GNU_STDCALL:
470 type = change_calling_convention(type, CC_STDCALL);
472 case ATTRIBUTE_MS_FASTCALL:
473 case ATTRIBUTE_GNU_FASTCALL:
474 type = change_calling_convention(type, CC_FASTCALL);
476 case ATTRIBUTE_MS_THISCALL:
477 type = change_calling_convention(type, CC_THISCALL);
479 case ATTRIBUTE_GNU_RETURNS_TWICE:
480 case ATTRIBUTE_MS_RETURNS_TWICE:
481 type = add_modifiers(type, DM_RETURNS_TWICE);
483 case ATTRIBUTE_GNU_NORETURN:
484 case ATTRIBUTE_MS_NORETURN:
485 type = add_modifiers(type, DM_NORETURN);
487 case ATTRIBUTE_GNU_MALLOC:
488 case ATTRIBUTE_MS_ALLOCATE:
489 type = add_modifiers(type, DM_MALLOC);
491 case ATTRIBUTE_GNU_NOTHROW:
492 case ATTRIBUTE_MS_NOTHROW:
493 type = add_modifiers(type, DM_NOTHROW);
495 case ATTRIBUTE_GNU_MODE:
496 type = handle_attribute_mode(attribute, type);
506 const char *get_deprecated_string(const attribute_t *attribute)
508 for ( ; attribute != NULL; attribute = attribute->next) {
509 if (attribute->kind != ATTRIBUTE_MS_DEPRECATED)
512 attribute_argument_t *argument = attribute->a.arguments;
513 return get_argument_string(argument);
518 static bool property_attribute_equal(const attribute_property_argument_t *prop1,
519 const attribute_property_argument_t *prop2)
521 return prop1->put_symbol == prop2->put_symbol
522 && prop1->get_symbol == prop2->get_symbol;
525 static bool attribute_argument_equal(const attribute_argument_t *arg1,
526 const attribute_argument_t *arg2)
528 if (arg1->kind != arg2->kind)
531 switch (arg1->kind) {
532 case ATTRIBUTE_ARGUMENT_SYMBOL:
533 return arg1->v.symbol == arg2->v.symbol;
534 case ATTRIBUTE_ARGUMENT_EXPRESSION:
538 panic("Unknown argument type found");
541 static bool attribute_arguments_equal(const attribute_argument_t *args1,
542 const attribute_argument_t *args2)
544 for ( ; args1 != NULL && args2 != NULL;
545 args1 = args1->next, args2 = args2->next) {
546 if (!attribute_argument_equal(args1, args2))
549 /* both should be NULL now */
550 return args1 == args2;
553 bool attributes_equal(const attribute_t *attr1, const attribute_t *attr2)
555 if (attr1->kind != attr2->kind)
558 switch (attr1->kind) {
559 case ATTRIBUTE_MS_PROPERTY:
560 return property_attribute_equal(attr1->a.property, attr2->a.property);
562 return attribute_arguments_equal(attr1->a.arguments,