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;
170 warningf(&attribute->source_position, "ignoring unknown mode '%s'",
175 if (type->kind == TYPE_ATOMIC) {
176 type_t *copy = duplicate_type(type);
177 copy->atomic.akind = akind;
178 return identify_new_type(copy);
179 } else if (type->kind == TYPE_ENUM) {
180 type_t *copy = duplicate_type(type);
181 copy->enumt.akind = akind;
182 return identify_new_type(copy);
183 } else if (is_type_pointer(type)) {
184 warningf(&attribute->source_position,
185 "__attribute__((mode)) on pointers not implemented yet (ignored)");
189 errorf(&attribute->source_position,
190 "__attribute__((mode)) only allowed on integer, enum or pointer type");
194 static inline bool is_po2(unsigned x)
196 return (x & (x-1)) == 0;
199 static void handle_attribute_aligned(const attribute_t *attribute,
202 int alignment = 32; /* TODO: fill in maximum useful alignment for
204 if (attribute->a.arguments) {
205 attribute_argument_t *argument = attribute->a.arguments;
206 alignment = fold_constant_to_int(argument->v.expression);
209 if (!is_po2(alignment)) {
210 errorf(&attribute->source_position,
211 "alignment must be a power of 2 but is %d\n",
215 if (alignment <= 0) {
216 errorf(&attribute->source_position,
217 "alignment must be bigger than 0 but is %d\n",
222 switch (entity->kind) {
223 DECLARATION_KIND_CASES
224 entity->declaration.alignment = alignment;
226 entity->typedefe.alignment = alignment;
230 if (alignment > entity->compound.alignment) {
231 entity->compound.alignment = alignment;
236 const char *what = get_entity_kind_name(entity->kind);
237 warningf(&attribute->source_position,
238 "alignment attribute specification on %s '%S' ignored",
239 what, entity->base.symbol);
245 static const char *get_argument_string(const attribute_argument_t *argument)
247 if (argument == NULL)
249 if (argument->kind != ATTRIBUTE_ARGUMENT_EXPRESSION)
251 expression_t *expression = argument->v.expression;
252 if (expression->kind != EXPR_STRING_LITERAL)
254 return expression->literal.value.begin;
257 static void handle_attribute_visibility(const attribute_t *attribute,
260 /* This isn't really correct, the backend should provide a list of machine
261 * specific modes (according to gcc philosophy that is...) */
262 attribute_argument_t *arg = attribute->a.arguments;
264 errorf(&attribute->source_position,
265 "__attribute__((visibility(X))) misses argument");
268 const char *string = get_argument_string(arg);
269 if (string == NULL) {
270 errorf(&attribute->source_position,
271 "__attribute__((visibility(X))) argument is not a string");
274 elf_visibility_tag_t visibility = get_elf_visibility_from_string(string);
275 if (visibility == ELF_VISIBILITY_ERROR) {
276 errorf(&attribute->source_position,
277 "unknown visibility type '%s'", string);
281 switch (entity->kind) {
282 case ENTITY_VARIABLE:
283 entity->variable.elf_visibility = visibility;
285 case ENTITY_FUNCTION:
286 entity->function.elf_visibility = visibility;
290 const char *what = get_entity_kind_name(entity->kind);
291 warningf(&attribute->source_position,
292 "visibility attribute specification on %s '%S' ignored",
293 what, entity->base.symbol);
299 static void warn_arguments(const attribute_t *attribute)
301 if (attribute->a.arguments == NULL)
305 warningf(&attribute->source_position,
306 "attribute '%s' needs no arguments",
307 get_attribute_name(attribute->kind));
311 static void handle_attribute_packed_e(const attribute_t *attribute,
315 if (entity->kind != ENTITY_STRUCT) {
316 warningf(&attribute->source_position,
317 "packed attribute on %s '%s' ignored",
318 get_entity_kind_name(entity->kind),
319 entity->base.symbol->string);
324 warn_arguments(attribute);
325 entity->compound.packed = true;
328 static void handle_attribute_packed(const attribute_t *attribute, type_t *type)
330 if (type->kind != TYPE_COMPOUND_STRUCT) {
331 warningf(&attribute->source_position,
332 "packed attribute on type '%T' ignored", type);
336 handle_attribute_packed_e(attribute, (entity_t*) type->compound.compound);
339 static void handle_attribute_asm(const attribute_t *attribute,
342 attribute_argument_t *argument = attribute->a.arguments;
343 assert (argument->kind == ATTRIBUTE_ARGUMENT_EXPRESSION);
344 expression_t *expression = argument->v.expression;
345 if (expression->kind != EXPR_STRING_LITERAL)
346 errorf(&attribute->source_position,
347 "Invalid asm attribute expression");
348 symbol_t *sym = symbol_table_insert(expression->string_literal.value.begin);
349 entity->function.actual_name = sym;
350 assert(argument->next == NULL);
354 void handle_entity_attributes(const attribute_t *attributes, entity_t *entity)
356 if (entity->kind == ENTITY_TYPEDEF) {
357 type_t *type = entity->typedefe.type;
358 type = handle_type_attributes(attributes, type);
359 entity->typedefe.type = type;
360 } else if (is_declaration(entity)) {
361 type_t *type = entity->declaration.type;
362 type = handle_type_attributes(attributes, type);
363 entity->declaration.type = type;
366 decl_modifiers_t modifiers = 0;
367 const attribute_t *attribute = attributes;
368 for ( ; attribute != NULL; attribute = attribute->next) {
369 switch(attribute->kind) {
370 case ATTRIBUTE_GNU_CONST: modifiers |= DM_CONST; break;
371 case ATTRIBUTE_GNU_DEPRECATED: modifiers |= DM_DEPRECATED; break;
372 case ATTRIBUTE_GNU_NOINLINE: modifiers |= DM_NOINLINE; break;
373 case ATTRIBUTE_GNU_RETURNS_TWICE: modifiers |= DM_RETURNS_TWICE; break;
374 case ATTRIBUTE_GNU_NORETURN: modifiers |= DM_NORETURN; break;
375 case ATTRIBUTE_GNU_NAKED: modifiers |= DM_NAKED; break;
376 case ATTRIBUTE_GNU_PURE: modifiers |= DM_PURE; break;
377 case ATTRIBUTE_GNU_ALWAYS_INLINE: modifiers |= DM_FORCEINLINE; break;
378 case ATTRIBUTE_GNU_MALLOC: modifiers |= DM_MALLOC; break;
379 case ATTRIBUTE_GNU_CONSTRUCTOR: modifiers |= DM_CONSTRUCTOR; break;
380 case ATTRIBUTE_GNU_DESTRUCTOR: modifiers |= DM_DESTRUCTOR; break;
381 case ATTRIBUTE_GNU_NOTHROW: modifiers |= DM_NOTHROW; break;
382 case ATTRIBUTE_GNU_TRANSPARENT_UNION:
383 modifiers |= DM_TRANSPARENT_UNION;
385 case ATTRIBUTE_GNU_USED: modifiers |= DM_USED; break;
386 case ATTRIBUTE_GNU_UNUSED: modifiers |= DM_UNUSED; break;
387 case ATTRIBUTE_GNU_DLLIMPORT: modifiers |= DM_DLLIMPORT; break;
388 case ATTRIBUTE_GNU_DLLEXPORT: modifiers |= DM_DLLEXPORT; break;
389 case ATTRIBUTE_GNU_WEAK: modifiers |= DM_WEAK; break;
391 case ATTRIBUTE_MS_ALLOCATE: modifiers |= DM_MALLOC; break;
392 case ATTRIBUTE_MS_DLLIMPORT: modifiers |= DM_DLLIMPORT; break;
393 case ATTRIBUTE_MS_DLLEXPORT: modifiers |= DM_DLLEXPORT; break;
394 case ATTRIBUTE_MS_NAKED: modifiers |= DM_NAKED; break;
395 case ATTRIBUTE_MS_NOINLINE: modifiers |= DM_NOINLINE; break;
396 case ATTRIBUTE_MS_RETURNS_TWICE: modifiers |= DM_RETURNS_TWICE; break;
397 case ATTRIBUTE_MS_NORETURN: modifiers |= DM_NORETURN; break;
398 case ATTRIBUTE_MS_NOTHROW: modifiers |= DM_NOTHROW; break;
399 case ATTRIBUTE_MS_THREAD: modifiers |= DM_THREAD; break;
400 case ATTRIBUTE_MS_DEPRECATED: modifiers |= DM_DEPRECATED; break;
401 case ATTRIBUTE_MS_RESTRICT: modifiers |= DM_RESTRICT; break;
402 case ATTRIBUTE_MS_NOALIAS: modifiers |= DM_NOALIAS; break;
404 case ATTRIBUTE_GNU_PACKED:
405 handle_attribute_packed_e(attribute, entity);
408 case ATTRIBUTE_GNU_ASM:
409 handle_attribute_asm(attribute, entity);
412 case ATTRIBUTE_GNU_VISIBILITY:
413 handle_attribute_visibility(attribute, entity);
416 case ATTRIBUTE_MS_ALIGN:
417 case ATTRIBUTE_GNU_ALIGNED:
418 handle_attribute_aligned(attribute, entity);
424 if (modifiers != 0) {
425 switch(entity->kind) {
427 entity->typedefe.modifiers |= modifiers;
431 entity->compound.modifiers |= modifiers;
433 case ENTITY_COMPOUND_MEMBER:
434 case ENTITY_VARIABLE:
435 case ENTITY_FUNCTION:
436 entity->declaration.modifiers |= modifiers;
445 static type_t *change_calling_convention(type_t *type, cc_kind_t cconv)
447 if (is_typeref(type) || !is_type_function(type)) {
451 if (type->function.calling_convention == cconv)
454 type_t* new_type = duplicate_type(type);
455 new_type->function.calling_convention = cconv;
456 return identify_new_type(new_type);
459 type_t *handle_type_attributes(const attribute_t *attributes, type_t *type)
461 const attribute_t *attribute = attributes;
462 for ( ; attribute != NULL; attribute = attribute->next) {
463 switch(attribute->kind) {
464 case ATTRIBUTE_GNU_PACKED:
465 handle_attribute_packed(attribute, type);
467 case ATTRIBUTE_GNU_CDECL:
468 case ATTRIBUTE_MS_CDECL:
469 type = change_calling_convention(type, CC_CDECL);
471 case ATTRIBUTE_MS_STDCALL:
472 case ATTRIBUTE_GNU_STDCALL:
473 type = change_calling_convention(type, CC_STDCALL);
475 case ATTRIBUTE_MS_FASTCALL:
476 case ATTRIBUTE_GNU_FASTCALL:
477 type = change_calling_convention(type, CC_FASTCALL);
479 case ATTRIBUTE_MS_THISCALL:
480 type = change_calling_convention(type, CC_THISCALL);
482 case ATTRIBUTE_GNU_MODE:
483 type = handle_attribute_mode(attribute, type);
493 const char *get_deprecated_string(const attribute_t *attribute)
495 for ( ; attribute != NULL; attribute = attribute->next) {
496 if (attribute->kind != ATTRIBUTE_MS_DEPRECATED)
499 attribute_argument_t *argument = attribute->a.arguments;
500 return get_argument_string(argument);
505 static bool property_attribute_equal(const attribute_property_argument_t *prop1,
506 const attribute_property_argument_t *prop2)
508 return prop1->put_symbol == prop2->put_symbol
509 && prop1->get_symbol == prop2->get_symbol;
512 static bool attribute_argument_equal(const attribute_argument_t *arg1,
513 const attribute_argument_t *arg2)
515 if (arg1->kind != arg2->kind)
518 switch (arg1->kind) {
519 case ATTRIBUTE_ARGUMENT_SYMBOL:
520 return arg1->v.symbol == arg2->v.symbol;
521 case ATTRIBUTE_ARGUMENT_EXPRESSION:
525 panic("Unknown argument type found");
528 static bool attribute_arguments_equal(const attribute_argument_t *args1,
529 const attribute_argument_t *args2)
531 for ( ; args1 != NULL && args2 != NULL;
532 args1 = args1->next, args2 = args2->next) {
533 if (!attribute_argument_equal(args1, args2))
536 /* both should be NULL now */
537 return args1 == args2;
540 bool attributes_equal(const attribute_t *attr1, const attribute_t *attr2)
542 if (attr1->kind != attr2->kind)
545 switch (attr1->kind) {
546 case ATTRIBUTE_MS_PROPERTY:
547 return property_attribute_equal(attr1->a.property, attr2->a.property);
549 return attribute_arguments_equal(attr1->a.arguments,