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 "adt/strutil.h"
24 #include "diagnostic.h"
26 #include "attribute_t.h"
28 #include "adt/error.h"
31 static const char *const attribute_names[ATTRIBUTE_LAST+1] = {
32 [ATTRIBUTE_GNU_CONST] = "const",
33 [ATTRIBUTE_GNU_VOLATILE] = "volatile",
34 [ATTRIBUTE_GNU_CDECL] = "cdecl",
35 [ATTRIBUTE_GNU_STDCALL] = "stdcall",
36 [ATTRIBUTE_GNU_FASTCALL] = "fastcall",
37 [ATTRIBUTE_GNU_DEPRECATED] = "deprecated",
38 [ATTRIBUTE_GNU_NOINLINE] = "noinline",
39 [ATTRIBUTE_GNU_RETURNS_TWICE] = "returns_twice",
40 [ATTRIBUTE_GNU_NORETURN] = "noreturn",
41 [ATTRIBUTE_GNU_NAKED] = "naked",
42 [ATTRIBUTE_GNU_PURE] = "pure",
43 [ATTRIBUTE_GNU_ALWAYS_INLINE] = "always_inline",
44 [ATTRIBUTE_GNU_MALLOC] = "malloc",
45 [ATTRIBUTE_GNU_WEAK] = "weak",
46 [ATTRIBUTE_GNU_CONSTRUCTOR] = "constructor",
47 [ATTRIBUTE_GNU_DESTRUCTOR] = "destructor",
48 [ATTRIBUTE_GNU_NOTHROW] = "nothrow",
49 [ATTRIBUTE_GNU_TRANSPARENT_UNION] = "transparent_union",
50 [ATTRIBUTE_GNU_COMMON] = "common",
51 [ATTRIBUTE_GNU_NOCOMMON] = "nocommon",
52 [ATTRIBUTE_GNU_PACKED] = "packed",
53 [ATTRIBUTE_GNU_SHARED] = "shared",
54 [ATTRIBUTE_GNU_NOTSHARED] = "notshared",
55 [ATTRIBUTE_GNU_USED] = "used",
56 [ATTRIBUTE_GNU_UNUSED] = "unused",
57 [ATTRIBUTE_GNU_NO_INSTRUMENT_FUNCTION] = "no_instrument_function",
58 [ATTRIBUTE_GNU_WARN_UNUSED_RESULT] = "warn_unused_result",
59 [ATTRIBUTE_GNU_LONGCALL] = "longcall",
60 [ATTRIBUTE_GNU_SHORTCALL] = "shortcall",
61 [ATTRIBUTE_GNU_LONG_CALL] = "long_call",
62 [ATTRIBUTE_GNU_SHORT_CALL] = "short_call",
63 [ATTRIBUTE_GNU_FUNCTION_VECTOR] = "function_vector",
64 [ATTRIBUTE_GNU_INTERRUPT] = "interrupt",
65 [ATTRIBUTE_GNU_INTERRUPT_HANDLER] = "interrupt_handler",
66 [ATTRIBUTE_GNU_NMI_HANDLER] = "nmi_handler",
67 [ATTRIBUTE_GNU_NESTING] = "nesting",
68 [ATTRIBUTE_GNU_NEAR] = "near",
69 [ATTRIBUTE_GNU_FAR] = "far",
70 [ATTRIBUTE_GNU_SIGNAL] = "signal",
71 [ATTRIBUTE_GNU_EIGTHBIT_DATA] = "eightbit_data",
72 [ATTRIBUTE_GNU_TINY_DATA] = "tiny_data",
73 [ATTRIBUTE_GNU_SAVEALL] = "saveall",
74 [ATTRIBUTE_GNU_FLATTEN] = "flatten",
75 [ATTRIBUTE_GNU_SSEREGPARM] = "sseregparm",
76 [ATTRIBUTE_GNU_EXTERNALLY_VISIBLE] = "externally_visible",
77 [ATTRIBUTE_GNU_MAY_ALIAS] = "may_alias",
78 [ATTRIBUTE_GNU_MS_STRUCT] = "ms_struct",
79 [ATTRIBUTE_GNU_GCC_STRUCT] = "gcc_struct",
80 [ATTRIBUTE_GNU_DLLIMPORT] = "dllimport",
81 [ATTRIBUTE_GNU_DLLEXPORT] = "dllexport",
82 [ATTRIBUTE_GNU_ALIGNED] = "aligned",
83 [ATTRIBUTE_GNU_ALIAS] = "alias",
84 [ATTRIBUTE_GNU_SECTION] = "section",
85 [ATTRIBUTE_GNU_FORMAT] = "format",
86 [ATTRIBUTE_GNU_FORMAT_ARG] = "format_arg",
87 [ATTRIBUTE_GNU_WEAKREF] = "weakref",
88 [ATTRIBUTE_GNU_NONNULL] = "nonnull",
89 [ATTRIBUTE_GNU_TLS_MODEL] = "tls_model",
90 [ATTRIBUTE_GNU_VISIBILITY] = "visibility",
91 [ATTRIBUTE_GNU_REGPARM] = "regparm",
92 [ATTRIBUTE_GNU_MODE] = "mode",
93 [ATTRIBUTE_GNU_MODEL] = "model",
94 [ATTRIBUTE_GNU_TRAP_EXIT] = "trap_exit",
95 [ATTRIBUTE_GNU_SP_SWITCH] = "sp_switch",
96 [ATTRIBUTE_GNU_SENTINEL] = "sentinel",
98 [ATTRIBUTE_MS_ALIGN] = "align",
99 [ATTRIBUTE_MS_ALLOCATE] = "allocate",
100 [ATTRIBUTE_MS_DLLIMPORT] = "dllimport",
101 [ATTRIBUTE_MS_DLLEXPORT] = "dllexport",
102 [ATTRIBUTE_MS_NAKED] = "naked",
103 [ATTRIBUTE_MS_NOINLINE] = "noinline",
104 [ATTRIBUTE_MS_RETURNS_TWICE] = "returns_twice",
105 [ATTRIBUTE_MS_NORETURN] = "noreturn",
106 [ATTRIBUTE_MS_NOTHROW] = "nothrow",
107 [ATTRIBUTE_MS_NOVTABLE] = "novtable",
108 [ATTRIBUTE_MS_PROPERTY] = "property",
109 [ATTRIBUTE_MS_SELECTANY] = "selectany",
110 [ATTRIBUTE_MS_THREAD] = "thread",
111 [ATTRIBUTE_MS_UUID] = "uuid",
112 [ATTRIBUTE_MS_DEPRECATED] = "deprecated",
113 [ATTRIBUTE_MS_RESTRICT] = "restrict",
114 [ATTRIBUTE_MS_NOALIAS] = "noalias",
117 const char *get_attribute_name(attribute_kind_t kind)
119 assert(kind <= ATTRIBUTE_LAST);
120 return attribute_names[kind];
123 type_t *handle_attribute_mode(const attribute_t *attribute, type_t *orig_type)
125 type_t *type = skip_typeref(orig_type);
127 /* at least: byte, word, pointer, list of machine modes
128 * __XXX___ is interpreted as XXX */
130 /* This isn't really correct, the backend should provide a list of machine
131 * specific modes (according to gcc philosophy that is...) */
132 attribute_argument_t *arg = attribute->a.arguments;
134 errorf(&attribute->source_position,
135 "__attribute__((mode(X))) misses argument");
139 const char *symbol_str = arg->v.symbol->string;
140 bool sign = is_type_signed(type);
141 atomic_type_kind_t akind;
142 if (streq_underscore("QI", symbol_str) ||
143 streq_underscore("byte", symbol_str)) {
144 akind = sign ? ATOMIC_TYPE_CHAR : ATOMIC_TYPE_UCHAR;
145 } else if (streq_underscore("HI", symbol_str)) {
146 akind = sign ? ATOMIC_TYPE_SHORT : ATOMIC_TYPE_USHORT;
147 } else if (streq_underscore("SI", symbol_str)
148 || streq_underscore("word", symbol_str)
149 || streq_underscore("pointer", symbol_str)) {
150 akind = sign ? ATOMIC_TYPE_INT : ATOMIC_TYPE_UINT;
151 } else if (streq_underscore("DI", symbol_str)) {
152 akind = sign ? ATOMIC_TYPE_LONGLONG : ATOMIC_TYPE_ULONGLONG;
154 source_position_t const *const pos = &attribute->source_position;
155 warningf(WARN_OTHER, pos, "ignoring unknown mode '%s'", symbol_str);
159 if (type->kind == TYPE_ATOMIC || type->kind == TYPE_ENUM) {
160 type_t *copy = duplicate_type(type);
161 copy->atomic.akind = akind;
162 return identify_new_type(copy);
163 } else if (is_type_pointer(type)) {
164 source_position_t const *const pos = &attribute->source_position;
165 warningf(WARN_OTHER, pos, "__attribute__((mode)) on pointers not implemented yet (ignored)");
169 errorf(&attribute->source_position,
170 "__attribute__((mode)) only allowed on integer, enum or pointer type");
174 static inline bool is_po2(unsigned x)
176 return (x & (x-1)) == 0;
179 static void handle_attribute_aligned(const attribute_t *attribute,
182 int alignment = 32; /* TODO: fill in maximum useful alignment for
184 if (attribute->a.arguments) {
185 attribute_argument_t *argument = attribute->a.arguments;
186 alignment = fold_constant_to_int(argument->v.expression);
189 if (!is_po2(alignment)) {
190 errorf(&attribute->source_position,
191 "alignment must be a power of 2 but is %d\n",
195 if (alignment <= 0) {
196 errorf(&attribute->source_position,
197 "alignment must be bigger than 0 but is %d\n",
202 switch (entity->kind) {
203 case DECLARATION_KIND_CASES:
204 entity->declaration.alignment = alignment;
206 entity->typedefe.alignment = alignment;
210 if (alignment > (int)entity->compound.alignment) {
211 entity->compound.alignment = alignment;
215 source_position_t const *const pos = &attribute->source_position;
216 char const *const what = get_entity_kind_name(entity->kind);
217 symbol_t const *const sym = entity->base.symbol;
218 warningf(WARN_OTHER, pos, "alignment attribute specification on %s '%S' ignored", what, sym);
224 static const char *get_argument_string(const attribute_argument_t *argument)
226 if (argument == NULL)
228 if (argument->kind != ATTRIBUTE_ARGUMENT_EXPRESSION)
230 expression_t *expression = argument->v.expression;
231 if (expression->kind != EXPR_STRING_LITERAL)
233 return expression->literal.value.begin;
236 static void handle_attribute_visibility(const attribute_t *attribute,
239 /* This isn't really correct, the backend should provide a list of machine
240 * specific modes (according to gcc philosophy that is...) */
241 attribute_argument_t *arg = attribute->a.arguments;
243 errorf(&attribute->source_position,
244 "__attribute__((visibility(X))) misses argument");
247 const char *string = get_argument_string(arg);
248 if (string == NULL) {
249 errorf(&attribute->source_position,
250 "__attribute__((visibility(X))) argument is not a string");
253 elf_visibility_tag_t visibility = get_elf_visibility_from_string(string);
254 if (visibility == ELF_VISIBILITY_ERROR) {
255 errorf(&attribute->source_position,
256 "unknown visibility type '%s'", string);
260 switch (entity->kind) {
261 case ENTITY_VARIABLE:
262 entity->variable.elf_visibility = visibility;
264 case ENTITY_FUNCTION:
265 entity->function.elf_visibility = visibility;
268 source_position_t const *const pos = &attribute->source_position;
269 char const *const what = get_entity_kind_name(entity->kind);
270 symbol_t const *const sym = entity->base.symbol;
271 warningf(WARN_OTHER, pos, "visibility attribute specification on %s '%S' ignored", what, sym);
277 static void warn_arguments(const attribute_t *attribute)
279 if (attribute->a.arguments == NULL)
282 source_position_t const *const pos = &attribute->source_position;
283 char const *const what = get_attribute_name(attribute->kind);
284 warningf(WARN_OTHER, pos, "attribute '%s' needs no arguments", what);
287 static void handle_attribute_packed_e(const attribute_t *attribute,
291 if (entity->kind != ENTITY_STRUCT) {
292 source_position_t const *const pos = &attribute->source_position;
293 char const *const what = get_entity_kind_name(entity->kind);
294 symbol_t const *const sym = entity->base.symbol;
295 warningf(WARN_OTHER, pos, "packed attribute on %s '%S' ignored", what, sym);
300 warn_arguments(attribute);
301 entity->compound.packed = true;
304 static void handle_attribute_packed(const attribute_t *attribute, type_t *type)
306 if (type->kind != TYPE_COMPOUND_STRUCT) {
307 source_position_t const *const pos = &attribute->source_position;
308 warningf(WARN_OTHER, pos, "packed attribute on type '%T' ignored", type);
312 handle_attribute_packed_e(attribute, (entity_t*) type->compound.compound);
315 static void handle_attribute_asm(const attribute_t *attribute,
318 attribute_argument_t *argument = attribute->a.arguments;
319 assert (argument->kind == ATTRIBUTE_ARGUMENT_EXPRESSION);
320 expression_t *expression = argument->v.expression;
321 if (expression->kind != EXPR_STRING_LITERAL)
322 errorf(&attribute->source_position,
323 "Invalid asm attribute expression");
324 symbol_t *sym = symbol_table_insert(expression->string_literal.value.begin);
325 entity->function.actual_name = sym;
326 assert(argument->next == NULL);
330 void handle_entity_attributes(const attribute_t *attributes, entity_t *entity)
332 if (entity->kind == ENTITY_TYPEDEF) {
333 type_t *type = entity->typedefe.type;
334 type = handle_type_attributes(attributes, type);
335 entity->typedefe.type = type;
336 } else if (is_declaration(entity)) {
337 type_t *type = entity->declaration.type;
338 type = handle_type_attributes(attributes, type);
339 entity->declaration.type = type;
342 decl_modifiers_t modifiers = 0;
343 const attribute_t *attribute = attributes;
344 for ( ; attribute != NULL; attribute = attribute->next) {
345 switch(attribute->kind) {
346 case ATTRIBUTE_GNU_CONST: modifiers |= DM_CONST; break;
347 case ATTRIBUTE_GNU_DEPRECATED: modifiers |= DM_DEPRECATED; break;
348 case ATTRIBUTE_GNU_NOINLINE: modifiers |= DM_NOINLINE; break;
349 case ATTRIBUTE_GNU_NAKED: modifiers |= DM_NAKED; break;
350 case ATTRIBUTE_GNU_PURE: modifiers |= DM_PURE; break;
351 case ATTRIBUTE_GNU_ALWAYS_INLINE: modifiers |= DM_FORCEINLINE; break;
352 case ATTRIBUTE_GNU_CONSTRUCTOR: modifiers |= DM_CONSTRUCTOR; break;
353 case ATTRIBUTE_GNU_DESTRUCTOR: modifiers |= DM_DESTRUCTOR; break;
354 case ATTRIBUTE_GNU_TRANSPARENT_UNION:
355 modifiers |= DM_TRANSPARENT_UNION;
357 case ATTRIBUTE_GNU_USED: modifiers |= DM_USED; break;
358 case ATTRIBUTE_GNU_UNUSED: modifiers |= DM_UNUSED; break;
359 case ATTRIBUTE_GNU_DLLIMPORT: modifiers |= DM_DLLIMPORT; break;
360 case ATTRIBUTE_GNU_DLLEXPORT: modifiers |= DM_DLLEXPORT; break;
361 case ATTRIBUTE_GNU_WEAK: modifiers |= DM_WEAK; break;
363 case ATTRIBUTE_MS_DLLIMPORT: modifiers |= DM_DLLIMPORT; break;
364 case ATTRIBUTE_MS_DLLEXPORT: modifiers |= DM_DLLEXPORT; break;
365 case ATTRIBUTE_MS_NAKED: modifiers |= DM_NAKED; break;
366 case ATTRIBUTE_MS_NOINLINE: modifiers |= DM_NOINLINE; break;
367 case ATTRIBUTE_MS_THREAD: modifiers |= DM_THREAD; break;
368 case ATTRIBUTE_MS_DEPRECATED: modifiers |= DM_DEPRECATED; break;
369 case ATTRIBUTE_MS_RESTRICT: modifiers |= DM_RESTRICT; break;
370 case ATTRIBUTE_MS_NOALIAS: modifiers |= DM_NOALIAS; break;
372 case ATTRIBUTE_GNU_PACKED:
373 handle_attribute_packed_e(attribute, entity);
376 case ATTRIBUTE_GNU_ASM:
377 handle_attribute_asm(attribute, entity);
380 case ATTRIBUTE_GNU_VISIBILITY:
381 handle_attribute_visibility(attribute, entity);
384 case ATTRIBUTE_MS_ALIGN:
385 case ATTRIBUTE_GNU_ALIGNED:
386 handle_attribute_aligned(attribute, entity);
392 if (modifiers != 0) {
393 switch(entity->kind) {
395 entity->typedefe.modifiers |= modifiers;
399 entity->compound.modifiers |= modifiers;
401 case ENTITY_COMPOUND_MEMBER:
402 case ENTITY_VARIABLE:
403 case ENTITY_FUNCTION:
404 entity->declaration.modifiers |= modifiers;
413 static type_t *change_calling_convention(type_t *type, cc_kind_t cconv)
415 if (is_typeref(type) || !is_type_function(type)) {
419 if (type->function.calling_convention == cconv)
422 type_t* new_type = duplicate_type(type);
423 new_type->function.calling_convention = cconv;
424 return identify_new_type(new_type);
427 static type_t *add_modifiers(type_t *type, decl_modifiers_t modifiers)
429 if (is_typeref(type) || !is_type_function(type)) {
433 if ((type->function.modifiers & modifiers) == modifiers)
436 type_t* new_type = duplicate_type(type);
437 new_type->function.modifiers |= modifiers;
438 return identify_new_type(new_type);
441 type_t *handle_type_attributes(const attribute_t *attributes, type_t *type)
443 const attribute_t *attribute = attributes;
444 for ( ; attribute != NULL; attribute = attribute->next) {
445 switch(attribute->kind) {
446 case ATTRIBUTE_GNU_PACKED:
447 handle_attribute_packed(attribute, type);
449 case ATTRIBUTE_GNU_CDECL:
450 case ATTRIBUTE_MS_CDECL:
451 type = change_calling_convention(type, CC_CDECL);
453 case ATTRIBUTE_MS_STDCALL:
454 case ATTRIBUTE_GNU_STDCALL:
455 type = change_calling_convention(type, CC_STDCALL);
457 case ATTRIBUTE_MS_FASTCALL:
458 case ATTRIBUTE_GNU_FASTCALL:
459 type = change_calling_convention(type, CC_FASTCALL);
461 case ATTRIBUTE_MS_THISCALL:
462 type = change_calling_convention(type, CC_THISCALL);
464 case ATTRIBUTE_GNU_RETURNS_TWICE:
465 case ATTRIBUTE_MS_RETURNS_TWICE:
466 type = add_modifiers(type, DM_RETURNS_TWICE);
468 case ATTRIBUTE_GNU_NORETURN:
469 case ATTRIBUTE_MS_NORETURN:
470 type = add_modifiers(type, DM_NORETURN);
472 case ATTRIBUTE_GNU_MALLOC:
473 case ATTRIBUTE_MS_ALLOCATE:
474 type = add_modifiers(type, DM_MALLOC);
476 case ATTRIBUTE_GNU_NOTHROW:
477 case ATTRIBUTE_MS_NOTHROW:
478 type = add_modifiers(type, DM_NOTHROW);
480 case ATTRIBUTE_GNU_MODE:
481 type = handle_attribute_mode(attribute, type);
491 const char *get_deprecated_string(const attribute_t *attribute)
493 for ( ; attribute != NULL; attribute = attribute->next) {
494 if (attribute->kind != ATTRIBUTE_MS_DEPRECATED)
497 attribute_argument_t *argument = attribute->a.arguments;
498 return get_argument_string(argument);
503 static bool property_attribute_equal(const attribute_property_argument_t *prop1,
504 const attribute_property_argument_t *prop2)
506 return prop1->put_symbol == prop2->put_symbol
507 && prop1->get_symbol == prop2->get_symbol;
510 static bool attribute_argument_equal(const attribute_argument_t *arg1,
511 const attribute_argument_t *arg2)
513 if (arg1->kind != arg2->kind)
516 switch (arg1->kind) {
517 case ATTRIBUTE_ARGUMENT_SYMBOL:
518 return arg1->v.symbol == arg2->v.symbol;
519 case ATTRIBUTE_ARGUMENT_EXPRESSION:
523 panic("Unknown argument type found");
526 static bool attribute_arguments_equal(const attribute_argument_t *args1,
527 const attribute_argument_t *args2)
529 for ( ; args1 != NULL && args2 != NULL;
530 args1 = args1->next, args2 = args2->next) {
531 if (!attribute_argument_equal(args1, args2))
534 /* both should be NULL now */
535 return args1 == args2;
538 bool attributes_equal(const attribute_t *attr1, const attribute_t *attr2)
540 if (attr1->kind != attr2->kind)
543 switch (attr1->kind) {
544 case ATTRIBUTE_MS_PROPERTY:
545 return property_attribute_equal(attr1->a.property, attr2->a.property);
547 return attribute_arguments_equal(attr1->a.arguments,