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_ALIAS] = "alias",
33 [ATTRIBUTE_GNU_ALIGNED] = "aligned",
34 [ATTRIBUTE_GNU_ALWAYS_INLINE] = "always_inline",
35 [ATTRIBUTE_GNU_CDECL] = "cdecl",
36 [ATTRIBUTE_GNU_COMMON] = "common",
37 [ATTRIBUTE_GNU_CONST] = "const",
38 [ATTRIBUTE_GNU_CONSTRUCTOR] = "constructor",
39 [ATTRIBUTE_GNU_DEPRECATED] = "deprecated",
40 [ATTRIBUTE_GNU_DESTRUCTOR] = "destructor",
41 [ATTRIBUTE_GNU_DLLEXPORT] = "dllexport",
42 [ATTRIBUTE_GNU_DLLIMPORT] = "dllimport",
43 [ATTRIBUTE_GNU_EIGTHBIT_DATA] = "eightbit_data",
44 [ATTRIBUTE_GNU_EXTERNALLY_VISIBLE] = "externally_visible",
45 [ATTRIBUTE_GNU_FAR] = "far",
46 [ATTRIBUTE_GNU_FASTCALL] = "fastcall",
47 [ATTRIBUTE_GNU_FLATTEN] = "flatten",
48 [ATTRIBUTE_GNU_FORMAT_ARG] = "format_arg",
49 [ATTRIBUTE_GNU_FORMAT] = "format",
50 [ATTRIBUTE_GNU_FUNCTION_VECTOR] = "function_vector",
51 [ATTRIBUTE_GNU_GCC_STRUCT] = "gcc_struct",
52 [ATTRIBUTE_GNU_INTERRUPT_HANDLER] = "interrupt_handler",
53 [ATTRIBUTE_GNU_INTERRUPT] = "interrupt",
54 [ATTRIBUTE_GNU_LEAF] = "leaf",
55 [ATTRIBUTE_GNU_LONGCALL] = "longcall",
56 [ATTRIBUTE_GNU_LONG_CALL] = "long_call",
57 [ATTRIBUTE_GNU_MALLOC] = "malloc",
58 [ATTRIBUTE_GNU_MAY_ALIAS] = "may_alias",
59 [ATTRIBUTE_GNU_MODEL] = "model",
60 [ATTRIBUTE_GNU_MODE] = "mode",
61 [ATTRIBUTE_GNU_MS_STRUCT] = "ms_struct",
62 [ATTRIBUTE_GNU_NAKED] = "naked",
63 [ATTRIBUTE_GNU_NEAR] = "near",
64 [ATTRIBUTE_GNU_NESTING] = "nesting",
65 [ATTRIBUTE_GNU_NMI_HANDLER] = "nmi_handler",
66 [ATTRIBUTE_GNU_NOCOMMON] = "nocommon",
67 [ATTRIBUTE_GNU_NOINLINE] = "noinline",
68 [ATTRIBUTE_GNU_NO_INSTRUMENT_FUNCTION] = "no_instrument_function",
69 [ATTRIBUTE_GNU_NONNULL] = "nonnull",
70 [ATTRIBUTE_GNU_NORETURN] = "noreturn",
71 [ATTRIBUTE_GNU_NOTHROW] = "nothrow",
72 [ATTRIBUTE_GNU_NOTSHARED] = "notshared",
73 [ATTRIBUTE_GNU_PACKED] = "packed",
74 [ATTRIBUTE_GNU_PURE] = "pure",
75 [ATTRIBUTE_GNU_REGPARM] = "regparm",
76 [ATTRIBUTE_GNU_RETURNS_TWICE] = "returns_twice",
77 [ATTRIBUTE_GNU_SAVEALL] = "saveall",
78 [ATTRIBUTE_GNU_SECTION] = "section",
79 [ATTRIBUTE_GNU_SENTINEL] = "sentinel",
80 [ATTRIBUTE_GNU_SHARED] = "shared",
81 [ATTRIBUTE_GNU_SHORTCALL] = "shortcall",
82 [ATTRIBUTE_GNU_SHORT_CALL] = "short_call",
83 [ATTRIBUTE_GNU_SIGNAL] = "signal",
84 [ATTRIBUTE_GNU_SP_SWITCH] = "sp_switch",
85 [ATTRIBUTE_GNU_SSEREGPARM] = "sseregparm",
86 [ATTRIBUTE_GNU_STDCALL] = "stdcall",
87 [ATTRIBUTE_GNU_TINY_DATA] = "tiny_data",
88 [ATTRIBUTE_GNU_TLS_MODEL] = "tls_model",
89 [ATTRIBUTE_GNU_TRANSPARENT_UNION] = "transparent_union",
90 [ATTRIBUTE_GNU_TRAP_EXIT] = "trap_exit",
91 [ATTRIBUTE_GNU_UNUSED] = "unused",
92 [ATTRIBUTE_GNU_USED] = "used",
93 [ATTRIBUTE_GNU_VISIBILITY] = "visibility",
94 [ATTRIBUTE_GNU_VOLATILE] = "volatile",
95 [ATTRIBUTE_GNU_WARN_UNUSED_RESULT] = "warn_unused_result",
96 [ATTRIBUTE_GNU_WEAKREF] = "weakref",
97 [ATTRIBUTE_GNU_WEAK] = "weak",
99 [ATTRIBUTE_MS_ALIGN] = "align",
100 [ATTRIBUTE_MS_ALLOCATE] = "allocate",
101 [ATTRIBUTE_MS_DEPRECATED] = "deprecated",
102 [ATTRIBUTE_MS_DLLEXPORT] = "dllexport",
103 [ATTRIBUTE_MS_DLLIMPORT] = "dllimport",
104 [ATTRIBUTE_MS_NAKED] = "naked",
105 [ATTRIBUTE_MS_NOALIAS] = "noalias",
106 [ATTRIBUTE_MS_NOINLINE] = "noinline",
107 [ATTRIBUTE_MS_NORETURN] = "noreturn",
108 [ATTRIBUTE_MS_NOTHROW] = "nothrow",
109 [ATTRIBUTE_MS_NOVTABLE] = "novtable",
110 [ATTRIBUTE_MS_PROPERTY] = "property",
111 [ATTRIBUTE_MS_RESTRICT] = "restrict",
112 [ATTRIBUTE_MS_RETURNS_TWICE] = "returns_twice",
113 [ATTRIBUTE_MS_SELECTANY] = "selectany",
114 [ATTRIBUTE_MS_THREAD] = "thread",
115 [ATTRIBUTE_MS_UUID] = "uuid",
118 const char *get_attribute_name(attribute_kind_t kind)
120 assert(kind <= ATTRIBUTE_LAST);
121 return attribute_names[kind];
124 type_t *handle_attribute_mode(const attribute_t *attribute, type_t *orig_type)
126 type_t *type = skip_typeref(orig_type);
128 /* at least: byte, word, pointer, list of machine modes
129 * __XXX___ is interpreted as XXX */
131 /* This isn't really correct, the backend should provide a list of machine
132 * specific modes (according to gcc philosophy that is...) */
133 attribute_argument_t *arg = attribute->a.arguments;
135 errorf(&attribute->pos, "__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 warningf(WARN_OTHER, &attribute->pos, "ignoring unknown mode '%s'",
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 warningf(WARN_OTHER, &attribute->pos, "__attribute__((mode)) on pointers not implemented yet (ignored)");
168 errorf(&attribute->pos,
169 "__attribute__((mode)) only allowed on integer, enum or pointer type");
173 static inline bool is_po2(unsigned x)
175 return (x & (x-1)) == 0;
178 static void handle_attribute_aligned(const attribute_t *attribute,
181 int alignment = 32; /* TODO: fill in maximum useful alignment for
183 if (attribute->a.arguments) {
184 attribute_argument_t *argument = attribute->a.arguments;
185 alignment = fold_constant_to_int(argument->v.expression);
188 if (!is_po2(alignment)) {
189 errorf(&attribute->pos, "alignment must be a power of 2 but is %d", alignment);
192 if (alignment <= 0) {
193 errorf(&attribute->pos, "alignment must be bigger than 0 but is %d", alignment);
197 switch (entity->kind) {
198 case DECLARATION_KIND_CASES:
199 entity->declaration.alignment = alignment;
201 entity->typedefe.alignment = alignment;
205 if (alignment > (int)entity->compound.alignment) {
206 entity->compound.alignment = alignment;
211 warningf(WARN_OTHER, &attribute->pos, "alignment attribute specification on '%N' ignored", entity);
216 static const char *get_argument_string(const attribute_argument_t *argument)
218 if (argument == NULL)
220 if (argument->kind != ATTRIBUTE_ARGUMENT_EXPRESSION)
222 expression_t *expression = argument->v.expression;
223 if (expression->kind != EXPR_STRING_LITERAL)
225 return expression->string_literal.value.begin;
228 static void handle_attribute_visibility(const attribute_t *attribute,
231 /* This isn't really correct, the backend should provide a list of machine
232 * specific modes (according to gcc philosophy that is...) */
233 attribute_argument_t *arg = attribute->a.arguments;
235 errorf(&attribute->pos,
236 "__attribute__((visibility(X))) misses argument");
239 const char *string = get_argument_string(arg);
240 if (string == NULL) {
241 errorf(&attribute->pos,
242 "__attribute__((visibility(X))) argument is not a string");
245 elf_visibility_tag_t visibility = get_elf_visibility_from_string(string);
246 if (visibility == ELF_VISIBILITY_ERROR) {
247 errorf(&attribute->pos,
248 "unknown visibility type '%s'", string);
252 switch (entity->kind) {
253 case ENTITY_VARIABLE:
254 entity->variable.elf_visibility = visibility;
256 case ENTITY_FUNCTION:
257 entity->function.elf_visibility = visibility;
261 warningf(WARN_OTHER, &attribute->pos, "visibility attribute specification on '%N' ignored", entity);
266 static void warn_arguments(const attribute_t *attribute)
268 if (attribute->a.arguments == NULL)
271 position_t const *const pos = &attribute->pos;
272 char const *const what = get_attribute_name(attribute->kind);
273 warningf(WARN_OTHER, pos, "attribute '%s' needs no arguments", what);
276 static void handle_attribute_packed_e(const attribute_t *attribute,
280 if (entity->kind != ENTITY_STRUCT) {
281 warningf(WARN_OTHER, &attribute->pos, "packed attribute on '%N' ignored", entity);
286 warn_arguments(attribute);
287 entity->compound.packed = true;
290 static void handle_attribute_packed(const attribute_t *attribute, type_t *type)
292 if (type->kind != TYPE_COMPOUND_STRUCT) {
293 position_t const *const pos = &attribute->pos;
294 warningf(WARN_OTHER, pos, "packed attribute on type '%T' ignored", type);
298 handle_attribute_packed_e(attribute, (entity_t*) type->compound.compound);
301 static void handle_attribute_asm(const attribute_t *attribute,
304 attribute_argument_t *argument = attribute->a.arguments;
305 assert (argument->kind == ATTRIBUTE_ARGUMENT_EXPRESSION);
306 expression_t *expression = argument->v.expression;
307 if (expression->kind != EXPR_STRING_LITERAL)
308 errorf(&attribute->pos, "Invalid asm attribute expression");
309 symbol_t *sym = symbol_table_insert(expression->string_literal.value.begin);
310 entity->function.actual_name = sym;
311 assert(argument->next == NULL);
315 void handle_entity_attributes(const attribute_t *attributes, entity_t *entity)
317 if (entity->kind == ENTITY_TYPEDEF) {
318 type_t *type = entity->typedefe.type;
319 type = handle_type_attributes(attributes, type);
320 entity->typedefe.type = type;
321 } else if (is_declaration(entity)) {
322 type_t *type = entity->declaration.type;
323 type = handle_type_attributes(attributes, type);
324 entity->declaration.type = type;
327 decl_modifiers_t modifiers = 0;
328 const attribute_t *attribute = attributes;
329 for ( ; attribute != NULL; attribute = attribute->next) {
330 switch(attribute->kind) {
331 case ATTRIBUTE_GNU_CONST: modifiers |= DM_CONST; break;
332 case ATTRIBUTE_GNU_DEPRECATED: modifiers |= DM_DEPRECATED; break;
333 case ATTRIBUTE_GNU_NOINLINE: modifiers |= DM_NOINLINE; break;
334 case ATTRIBUTE_GNU_NAKED: modifiers |= DM_NAKED; break;
335 case ATTRIBUTE_GNU_PURE: modifiers |= DM_PURE; break;
336 case ATTRIBUTE_GNU_ALWAYS_INLINE: modifiers |= DM_FORCEINLINE; break;
337 case ATTRIBUTE_GNU_CONSTRUCTOR: modifiers |= DM_CONSTRUCTOR; break;
338 case ATTRIBUTE_GNU_DESTRUCTOR: modifiers |= DM_DESTRUCTOR; break;
339 case ATTRIBUTE_GNU_TRANSPARENT_UNION:
340 modifiers |= DM_TRANSPARENT_UNION;
342 case ATTRIBUTE_GNU_USED: modifiers |= DM_USED; break;
343 case ATTRIBUTE_GNU_UNUSED: modifiers |= DM_UNUSED; break;
344 case ATTRIBUTE_GNU_DLLIMPORT: modifiers |= DM_DLLIMPORT; break;
345 case ATTRIBUTE_GNU_DLLEXPORT: modifiers |= DM_DLLEXPORT; break;
346 case ATTRIBUTE_GNU_WEAK: modifiers |= DM_WEAK; break;
347 case ATTRIBUTE_GNU_LEAF: modifiers |= DM_LEAF; break;
349 case ATTRIBUTE_MS_DLLIMPORT: modifiers |= DM_DLLIMPORT; break;
350 case ATTRIBUTE_MS_DLLEXPORT: modifiers |= DM_DLLEXPORT; break;
351 case ATTRIBUTE_MS_NAKED: modifiers |= DM_NAKED; break;
352 case ATTRIBUTE_MS_NOINLINE: modifiers |= DM_NOINLINE; break;
353 case ATTRIBUTE_MS_THREAD: modifiers |= DM_THREAD; break;
354 case ATTRIBUTE_MS_DEPRECATED: modifiers |= DM_DEPRECATED; break;
355 case ATTRIBUTE_MS_RESTRICT: modifiers |= DM_RESTRICT; break;
356 case ATTRIBUTE_MS_NOALIAS: modifiers |= DM_NOALIAS; break;
358 case ATTRIBUTE_GNU_PACKED:
359 handle_attribute_packed_e(attribute, entity);
362 case ATTRIBUTE_GNU_ASM:
363 handle_attribute_asm(attribute, entity);
366 case ATTRIBUTE_GNU_VISIBILITY:
367 handle_attribute_visibility(attribute, entity);
370 case ATTRIBUTE_MS_ALIGN:
371 case ATTRIBUTE_GNU_ALIGNED:
372 handle_attribute_aligned(attribute, entity);
378 if (modifiers != 0) {
379 switch(entity->kind) {
381 entity->typedefe.modifiers |= modifiers;
385 entity->compound.modifiers |= modifiers;
387 case ENTITY_COMPOUND_MEMBER:
388 case ENTITY_VARIABLE:
389 case ENTITY_FUNCTION:
390 entity->declaration.modifiers |= modifiers;
399 static type_t *change_calling_convention(type_t *type, cc_kind_t cconv)
401 if (is_typeref(type) || !is_type_function(type)) {
405 if (type->function.calling_convention == cconv)
408 type_t* new_type = duplicate_type(type);
409 new_type->function.calling_convention = cconv;
410 return identify_new_type(new_type);
413 static type_t *add_modifiers(type_t *type, decl_modifiers_t modifiers)
415 if (is_typeref(type) || !is_type_function(type)) {
419 if ((type->function.modifiers & modifiers) == modifiers)
422 type_t* new_type = duplicate_type(type);
423 new_type->function.modifiers |= modifiers;
424 return identify_new_type(new_type);
427 type_t *handle_type_attributes(const attribute_t *attributes, type_t *type)
429 const attribute_t *attribute = attributes;
430 for ( ; attribute != NULL; attribute = attribute->next) {
431 switch(attribute->kind) {
432 case ATTRIBUTE_GNU_PACKED:
433 handle_attribute_packed(attribute, type);
435 case ATTRIBUTE_GNU_CDECL:
436 case ATTRIBUTE_MS_CDECL:
437 type = change_calling_convention(type, CC_CDECL);
439 case ATTRIBUTE_MS_STDCALL:
440 case ATTRIBUTE_GNU_STDCALL:
441 type = change_calling_convention(type, CC_STDCALL);
443 case ATTRIBUTE_MS_FASTCALL:
444 case ATTRIBUTE_GNU_FASTCALL:
445 type = change_calling_convention(type, CC_FASTCALL);
447 case ATTRIBUTE_MS_THISCALL:
448 type = change_calling_convention(type, CC_THISCALL);
450 case ATTRIBUTE_GNU_RETURNS_TWICE:
451 case ATTRIBUTE_MS_RETURNS_TWICE:
452 type = add_modifiers(type, DM_RETURNS_TWICE);
454 case ATTRIBUTE_GNU_NORETURN:
455 case ATTRIBUTE_MS_NORETURN:
456 type = add_modifiers(type, DM_NORETURN);
458 case ATTRIBUTE_GNU_MALLOC:
459 case ATTRIBUTE_MS_ALLOCATE:
460 type = add_modifiers(type, DM_MALLOC);
462 case ATTRIBUTE_GNU_NOTHROW:
463 case ATTRIBUTE_MS_NOTHROW:
464 type = add_modifiers(type, DM_NOTHROW);
466 case ATTRIBUTE_GNU_MODE:
467 type = handle_attribute_mode(attribute, type);
477 const char *get_deprecated_string(const attribute_t *attribute)
479 for ( ; attribute != NULL; attribute = attribute->next) {
480 if (attribute->kind != ATTRIBUTE_MS_DEPRECATED)
483 attribute_argument_t *argument = attribute->a.arguments;
484 return get_argument_string(argument);
489 static bool property_attribute_equal(const attribute_property_argument_t *prop1,
490 const attribute_property_argument_t *prop2)
492 return prop1->put_symbol == prop2->put_symbol
493 && prop1->get_symbol == prop2->get_symbol;
496 static bool attribute_argument_equal(const attribute_argument_t *arg1,
497 const attribute_argument_t *arg2)
499 if (arg1->kind != arg2->kind)
502 switch (arg1->kind) {
503 case ATTRIBUTE_ARGUMENT_SYMBOL:
504 return arg1->v.symbol == arg2->v.symbol;
505 case ATTRIBUTE_ARGUMENT_EXPRESSION:
509 panic("unknown argument type");
512 static bool attribute_arguments_equal(const attribute_argument_t *args1,
513 const attribute_argument_t *args2)
515 for ( ; args1 != NULL && args2 != NULL;
516 args1 = args1->next, args2 = args2->next) {
517 if (!attribute_argument_equal(args1, args2))
520 /* both should be NULL now */
521 return args1 == args2;
524 bool attributes_equal(const attribute_t *attr1, const attribute_t *attr2)
526 if (attr1->kind != attr2->kind)
529 switch (attr1->kind) {
530 case ATTRIBUTE_MS_PROPERTY:
531 return property_attribute_equal(attr1->a.property, attr2->a.property);
533 return attribute_arguments_equal(attr1->a.arguments,