2 * This file is part of cparser.
3 * Copyright (C) 2012 Matthias Braun <matze@braunis.de>
8 #include "adt/strutil.h"
9 #include "diagnostic.h"
11 #include "attribute_t.h"
13 #include "adt/error.h"
16 static const char *const attribute_names[ATTRIBUTE_LAST+1] = {
17 [ATTRIBUTE_GNU_ALIAS] = "alias",
18 [ATTRIBUTE_GNU_ALIGNED] = "aligned",
19 [ATTRIBUTE_GNU_ALWAYS_INLINE] = "always_inline",
20 [ATTRIBUTE_GNU_CDECL] = "cdecl",
21 [ATTRIBUTE_GNU_COMMON] = "common",
22 [ATTRIBUTE_GNU_CONST] = "const",
23 [ATTRIBUTE_GNU_CONSTRUCTOR] = "constructor",
24 [ATTRIBUTE_GNU_DEPRECATED] = "deprecated",
25 [ATTRIBUTE_GNU_DESTRUCTOR] = "destructor",
26 [ATTRIBUTE_GNU_DLLEXPORT] = "dllexport",
27 [ATTRIBUTE_GNU_DLLIMPORT] = "dllimport",
28 [ATTRIBUTE_GNU_EIGTHBIT_DATA] = "eightbit_data",
29 [ATTRIBUTE_GNU_EXTERNALLY_VISIBLE] = "externally_visible",
30 [ATTRIBUTE_GNU_FAR] = "far",
31 [ATTRIBUTE_GNU_FASTCALL] = "fastcall",
32 [ATTRIBUTE_GNU_FLATTEN] = "flatten",
33 [ATTRIBUTE_GNU_FORMAT_ARG] = "format_arg",
34 [ATTRIBUTE_GNU_FORMAT] = "format",
35 [ATTRIBUTE_GNU_FUNCTION_VECTOR] = "function_vector",
36 [ATTRIBUTE_GNU_GCC_STRUCT] = "gcc_struct",
37 [ATTRIBUTE_GNU_INTERRUPT_HANDLER] = "interrupt_handler",
38 [ATTRIBUTE_GNU_INTERRUPT] = "interrupt",
39 [ATTRIBUTE_GNU_LEAF] = "leaf",
40 [ATTRIBUTE_GNU_LONGCALL] = "longcall",
41 [ATTRIBUTE_GNU_LONG_CALL] = "long_call",
42 [ATTRIBUTE_GNU_MALLOC] = "malloc",
43 [ATTRIBUTE_GNU_MAY_ALIAS] = "may_alias",
44 [ATTRIBUTE_GNU_MODEL] = "model",
45 [ATTRIBUTE_GNU_MODE] = "mode",
46 [ATTRIBUTE_GNU_MS_STRUCT] = "ms_struct",
47 [ATTRIBUTE_GNU_NAKED] = "naked",
48 [ATTRIBUTE_GNU_NEAR] = "near",
49 [ATTRIBUTE_GNU_NESTING] = "nesting",
50 [ATTRIBUTE_GNU_NMI_HANDLER] = "nmi_handler",
51 [ATTRIBUTE_GNU_NOCOMMON] = "nocommon",
52 [ATTRIBUTE_GNU_NOINLINE] = "noinline",
53 [ATTRIBUTE_GNU_NO_INSTRUMENT_FUNCTION] = "no_instrument_function",
54 [ATTRIBUTE_GNU_NONNULL] = "nonnull",
55 [ATTRIBUTE_GNU_NORETURN] = "noreturn",
56 [ATTRIBUTE_GNU_NOTHROW] = "nothrow",
57 [ATTRIBUTE_GNU_NOTSHARED] = "notshared",
58 [ATTRIBUTE_GNU_PACKED] = "packed",
59 [ATTRIBUTE_GNU_PURE] = "pure",
60 [ATTRIBUTE_GNU_REGPARM] = "regparm",
61 [ATTRIBUTE_GNU_RETURNS_TWICE] = "returns_twice",
62 [ATTRIBUTE_GNU_SAVEALL] = "saveall",
63 [ATTRIBUTE_GNU_SECTION] = "section",
64 [ATTRIBUTE_GNU_SENTINEL] = "sentinel",
65 [ATTRIBUTE_GNU_SHARED] = "shared",
66 [ATTRIBUTE_GNU_SHORTCALL] = "shortcall",
67 [ATTRIBUTE_GNU_SHORT_CALL] = "short_call",
68 [ATTRIBUTE_GNU_SIGNAL] = "signal",
69 [ATTRIBUTE_GNU_SP_SWITCH] = "sp_switch",
70 [ATTRIBUTE_GNU_SSEREGPARM] = "sseregparm",
71 [ATTRIBUTE_GNU_STDCALL] = "stdcall",
72 [ATTRIBUTE_GNU_TINY_DATA] = "tiny_data",
73 [ATTRIBUTE_GNU_TLS_MODEL] = "tls_model",
74 [ATTRIBUTE_GNU_TRANSPARENT_UNION] = "transparent_union",
75 [ATTRIBUTE_GNU_TRAP_EXIT] = "trap_exit",
76 [ATTRIBUTE_GNU_UNUSED] = "unused",
77 [ATTRIBUTE_GNU_USED] = "used",
78 [ATTRIBUTE_GNU_VISIBILITY] = "visibility",
79 [ATTRIBUTE_GNU_VOLATILE] = "volatile",
80 [ATTRIBUTE_GNU_WARN_UNUSED_RESULT] = "warn_unused_result",
81 [ATTRIBUTE_GNU_WEAKREF] = "weakref",
82 [ATTRIBUTE_GNU_WEAK] = "weak",
84 [ATTRIBUTE_MS_ALIGN] = "align",
85 [ATTRIBUTE_MS_ALLOCATE] = "allocate",
86 [ATTRIBUTE_MS_DEPRECATED] = "deprecated",
87 [ATTRIBUTE_MS_DLLEXPORT] = "dllexport",
88 [ATTRIBUTE_MS_DLLIMPORT] = "dllimport",
89 [ATTRIBUTE_MS_NAKED] = "naked",
90 [ATTRIBUTE_MS_NOALIAS] = "noalias",
91 [ATTRIBUTE_MS_NOINLINE] = "noinline",
92 [ATTRIBUTE_MS_NORETURN] = "noreturn",
93 [ATTRIBUTE_MS_NOTHROW] = "nothrow",
94 [ATTRIBUTE_MS_NOVTABLE] = "novtable",
95 [ATTRIBUTE_MS_PROPERTY] = "property",
96 [ATTRIBUTE_MS_RESTRICT] = "restrict",
97 [ATTRIBUTE_MS_RETURNS_TWICE] = "returns_twice",
98 [ATTRIBUTE_MS_SELECTANY] = "selectany",
99 [ATTRIBUTE_MS_THREAD] = "thread",
100 [ATTRIBUTE_MS_UUID] = "uuid",
103 const char *get_attribute_name(attribute_kind_t kind)
105 assert(kind <= ATTRIBUTE_LAST);
106 return attribute_names[kind];
109 type_t *handle_attribute_mode(const attribute_t *attribute, type_t *orig_type)
111 type_t *type = skip_typeref(orig_type);
113 /* at least: byte, word, pointer, list of machine modes
114 * __XXX___ is interpreted as XXX */
116 /* This isn't really correct, the backend should provide a list of machine
117 * specific modes (according to gcc philosophy that is...) */
118 attribute_argument_t *arg = attribute->a.arguments;
120 errorf(&attribute->pos, "__attribute__((mode(X))) misses argument");
124 const char *symbol_str = arg->v.symbol->string;
125 bool sign = is_type_signed(type);
126 atomic_type_kind_t akind;
127 if (streq_underscore("QI", symbol_str) ||
128 streq_underscore("byte", symbol_str)) {
129 akind = sign ? ATOMIC_TYPE_CHAR : ATOMIC_TYPE_UCHAR;
130 } else if (streq_underscore("HI", symbol_str)) {
131 akind = sign ? ATOMIC_TYPE_SHORT : ATOMIC_TYPE_USHORT;
132 } else if (streq_underscore("SI", symbol_str)
133 || streq_underscore("word", symbol_str)
134 || streq_underscore("pointer", symbol_str)) {
135 akind = sign ? ATOMIC_TYPE_INT : ATOMIC_TYPE_UINT;
136 } else if (streq_underscore("DI", symbol_str)) {
137 akind = sign ? ATOMIC_TYPE_LONGLONG : ATOMIC_TYPE_ULONGLONG;
139 warningf(WARN_OTHER, &attribute->pos, "ignoring unknown mode '%s'",
144 if (type->kind == TYPE_ATOMIC || type->kind == TYPE_ENUM) {
145 type_t *copy = duplicate_type(type);
146 copy->atomic.akind = akind;
147 return identify_new_type(copy);
148 } else if (is_type_pointer(type)) {
149 warningf(WARN_OTHER, &attribute->pos, "__attribute__((mode)) on pointers not implemented yet (ignored)");
153 errorf(&attribute->pos,
154 "__attribute__((mode)) only allowed on integer, enum or pointer type");
158 static inline bool is_po2(unsigned x)
160 return (x & (x-1)) == 0;
163 static void handle_attribute_aligned(const attribute_t *attribute,
166 int alignment = 32; /* TODO: fill in maximum useful alignment for
168 if (attribute->a.arguments) {
169 attribute_argument_t *argument = attribute->a.arguments;
170 alignment = fold_constant_to_int(argument->v.expression);
173 if (!is_po2(alignment)) {
174 errorf(&attribute->pos, "alignment must be a power of 2 but is %d", alignment);
177 if (alignment <= 0) {
178 errorf(&attribute->pos, "alignment must be bigger than 0 but is %d", alignment);
182 switch (entity->kind) {
183 case DECLARATION_KIND_CASES:
184 entity->declaration.alignment = alignment;
186 entity->typedefe.alignment = alignment;
190 if (alignment > (int)entity->compound.alignment) {
191 entity->compound.alignment = alignment;
196 warningf(WARN_OTHER, &attribute->pos, "alignment attribute specification on '%N' ignored", entity);
201 static const char *get_argument_string(const attribute_argument_t *argument)
203 if (argument == NULL)
205 if (argument->kind != ATTRIBUTE_ARGUMENT_EXPRESSION)
207 expression_t *expression = argument->v.expression;
208 if (expression->kind != EXPR_STRING_LITERAL)
210 return expression->string_literal.value.begin;
213 static void handle_attribute_visibility(const attribute_t *attribute,
216 /* This isn't really correct, the backend should provide a list of machine
217 * specific modes (according to gcc philosophy that is...) */
218 attribute_argument_t *arg = attribute->a.arguments;
220 errorf(&attribute->pos,
221 "__attribute__((visibility(X))) misses argument");
224 const char *string = get_argument_string(arg);
225 if (string == NULL) {
226 errorf(&attribute->pos,
227 "__attribute__((visibility(X))) argument is not a string");
230 elf_visibility_tag_t visibility = get_elf_visibility_from_string(string);
231 if (visibility == ELF_VISIBILITY_ERROR) {
232 errorf(&attribute->pos,
233 "unknown visibility type '%s'", string);
237 switch (entity->kind) {
238 case ENTITY_VARIABLE:
239 entity->variable.elf_visibility = visibility;
241 case ENTITY_FUNCTION:
242 entity->function.elf_visibility = visibility;
246 warningf(WARN_OTHER, &attribute->pos, "visibility attribute specification on '%N' ignored", entity);
251 static void warn_arguments(const attribute_t *attribute)
253 if (attribute->a.arguments == NULL)
256 position_t const *const pos = &attribute->pos;
257 char const *const what = get_attribute_name(attribute->kind);
258 warningf(WARN_OTHER, pos, "attribute '%s' needs no arguments", what);
261 static void handle_attribute_packed_e(const attribute_t *attribute,
265 if (entity->kind != ENTITY_STRUCT) {
266 warningf(WARN_OTHER, &attribute->pos, "packed attribute on '%N' ignored", entity);
271 warn_arguments(attribute);
272 entity->compound.packed = true;
275 static void handle_attribute_packed(const attribute_t *attribute, type_t *type)
277 if (type->kind != TYPE_COMPOUND_STRUCT) {
278 position_t const *const pos = &attribute->pos;
279 warningf(WARN_OTHER, pos, "packed attribute on type '%T' ignored", type);
283 handle_attribute_packed_e(attribute, (entity_t*) type->compound.compound);
286 static void handle_attribute_asm(const attribute_t *attribute,
289 attribute_argument_t *argument = attribute->a.arguments;
290 assert (argument->kind == ATTRIBUTE_ARGUMENT_EXPRESSION);
291 expression_t *expression = argument->v.expression;
292 if (expression->kind != EXPR_STRING_LITERAL)
293 errorf(&attribute->pos, "Invalid asm attribute expression");
294 symbol_t *sym = symbol_table_insert(expression->string_literal.value.begin);
295 entity->function.actual_name = sym;
296 assert(argument->next == NULL);
300 void handle_entity_attributes(const attribute_t *attributes, entity_t *entity)
302 if (entity->kind == ENTITY_TYPEDEF) {
303 type_t *type = entity->typedefe.type;
304 type = handle_type_attributes(attributes, type);
305 entity->typedefe.type = type;
306 } else if (is_declaration(entity)) {
307 type_t *type = entity->declaration.type;
308 type = handle_type_attributes(attributes, type);
309 entity->declaration.type = type;
312 decl_modifiers_t modifiers = 0;
313 const attribute_t *attribute = attributes;
314 for ( ; attribute != NULL; attribute = attribute->next) {
315 switch (attribute->kind) {
316 case ATTRIBUTE_GNU_CONST: modifiers |= DM_CONST; break;
317 case ATTRIBUTE_GNU_DEPRECATED: modifiers |= DM_DEPRECATED; break;
318 case ATTRIBUTE_GNU_NOINLINE: modifiers |= DM_NOINLINE; break;
319 case ATTRIBUTE_GNU_NAKED: modifiers |= DM_NAKED; break;
320 case ATTRIBUTE_GNU_PURE: modifiers |= DM_PURE; break;
321 case ATTRIBUTE_GNU_ALWAYS_INLINE: modifiers |= DM_FORCEINLINE; break;
322 case ATTRIBUTE_GNU_CONSTRUCTOR: modifiers |= DM_CONSTRUCTOR; break;
323 case ATTRIBUTE_GNU_DESTRUCTOR: modifiers |= DM_DESTRUCTOR; break;
324 case ATTRIBUTE_GNU_TRANSPARENT_UNION:
325 modifiers |= DM_TRANSPARENT_UNION;
327 case ATTRIBUTE_GNU_USED: modifiers |= DM_USED; break;
328 case ATTRIBUTE_GNU_UNUSED: modifiers |= DM_UNUSED; break;
329 case ATTRIBUTE_GNU_DLLIMPORT: modifiers |= DM_DLLIMPORT; break;
330 case ATTRIBUTE_GNU_DLLEXPORT: modifiers |= DM_DLLEXPORT; break;
331 case ATTRIBUTE_GNU_WEAK: modifiers |= DM_WEAK; break;
332 case ATTRIBUTE_GNU_LEAF: modifiers |= DM_LEAF; break;
334 case ATTRIBUTE_MS_DLLIMPORT: modifiers |= DM_DLLIMPORT; break;
335 case ATTRIBUTE_MS_DLLEXPORT: modifiers |= DM_DLLEXPORT; break;
336 case ATTRIBUTE_MS_NAKED: modifiers |= DM_NAKED; break;
337 case ATTRIBUTE_MS_NOINLINE: modifiers |= DM_NOINLINE; break;
338 case ATTRIBUTE_MS_THREAD: modifiers |= DM_THREAD; break;
339 case ATTRIBUTE_MS_DEPRECATED: modifiers |= DM_DEPRECATED; break;
340 case ATTRIBUTE_MS_RESTRICT: modifiers |= DM_RESTRICT; break;
341 case ATTRIBUTE_MS_NOALIAS: modifiers |= DM_NOALIAS; break;
343 case ATTRIBUTE_GNU_PACKED:
344 handle_attribute_packed_e(attribute, entity);
347 case ATTRIBUTE_GNU_ASM:
348 handle_attribute_asm(attribute, entity);
351 case ATTRIBUTE_GNU_VISIBILITY:
352 handle_attribute_visibility(attribute, entity);
355 case ATTRIBUTE_MS_ALIGN:
356 case ATTRIBUTE_GNU_ALIGNED:
357 handle_attribute_aligned(attribute, entity);
363 if (modifiers != 0) {
364 switch (entity->kind) {
366 entity->typedefe.modifiers |= modifiers;
370 entity->compound.modifiers |= modifiers;
372 case ENTITY_COMPOUND_MEMBER:
373 case ENTITY_VARIABLE:
374 case ENTITY_FUNCTION:
375 entity->declaration.modifiers |= modifiers;
384 static type_t *change_calling_convention(type_t *type, cc_kind_t cconv)
386 if (is_typeref(type) || !is_type_function(type)) {
390 if (type->function.calling_convention == cconv)
393 type_t* new_type = duplicate_type(type);
394 new_type->function.calling_convention = cconv;
395 return identify_new_type(new_type);
398 static type_t *add_modifiers(type_t *type, decl_modifiers_t modifiers)
400 if (is_typeref(type) || !is_type_function(type)) {
404 if ((type->function.modifiers & modifiers) == modifiers)
407 type_t* new_type = duplicate_type(type);
408 new_type->function.modifiers |= modifiers;
409 return identify_new_type(new_type);
412 type_t *handle_type_attributes(const attribute_t *attributes, type_t *type)
414 const attribute_t *attribute = attributes;
415 for ( ; attribute != NULL; attribute = attribute->next) {
416 switch (attribute->kind) {
417 case ATTRIBUTE_GNU_PACKED:
418 handle_attribute_packed(attribute, type);
420 case ATTRIBUTE_GNU_CDECL:
421 case ATTRIBUTE_MS_CDECL:
422 type = change_calling_convention(type, CC_CDECL);
424 case ATTRIBUTE_MS_STDCALL:
425 case ATTRIBUTE_GNU_STDCALL:
426 type = change_calling_convention(type, CC_STDCALL);
428 case ATTRIBUTE_MS_FASTCALL:
429 case ATTRIBUTE_GNU_FASTCALL:
430 type = change_calling_convention(type, CC_FASTCALL);
432 case ATTRIBUTE_MS_THISCALL:
433 type = change_calling_convention(type, CC_THISCALL);
435 case ATTRIBUTE_GNU_RETURNS_TWICE:
436 case ATTRIBUTE_MS_RETURNS_TWICE:
437 type = add_modifiers(type, DM_RETURNS_TWICE);
439 case ATTRIBUTE_GNU_NORETURN:
440 case ATTRIBUTE_MS_NORETURN:
441 type = add_modifiers(type, DM_NORETURN);
443 case ATTRIBUTE_GNU_MALLOC:
444 case ATTRIBUTE_MS_ALLOCATE:
445 type = add_modifiers(type, DM_MALLOC);
447 case ATTRIBUTE_GNU_NOTHROW:
448 case ATTRIBUTE_MS_NOTHROW:
449 type = add_modifiers(type, DM_NOTHROW);
451 case ATTRIBUTE_GNU_MODE:
452 type = handle_attribute_mode(attribute, type);
462 const char *get_deprecated_string(const attribute_t *attribute)
464 for ( ; attribute != NULL; attribute = attribute->next) {
465 if (attribute->kind != ATTRIBUTE_MS_DEPRECATED)
468 attribute_argument_t *argument = attribute->a.arguments;
469 return get_argument_string(argument);
474 static bool property_attribute_equal(const attribute_property_argument_t *prop1,
475 const attribute_property_argument_t *prop2)
477 return prop1->put_symbol == prop2->put_symbol
478 && prop1->get_symbol == prop2->get_symbol;
481 static bool attribute_argument_equal(const attribute_argument_t *arg1,
482 const attribute_argument_t *arg2)
484 if (arg1->kind != arg2->kind)
487 switch (arg1->kind) {
488 case ATTRIBUTE_ARGUMENT_SYMBOL:
489 return arg1->v.symbol == arg2->v.symbol;
490 case ATTRIBUTE_ARGUMENT_EXPRESSION:
494 panic("unknown argument type");
497 static bool attribute_arguments_equal(const attribute_argument_t *args1,
498 const attribute_argument_t *args2)
500 for ( ; args1 != NULL && args2 != NULL;
501 args1 = args1->next, args2 = args2->next) {
502 if (!attribute_argument_equal(args1, args2))
505 /* both should be NULL now */
506 return args1 == args2;
509 bool attributes_equal(const attribute_t *attr1, const attribute_t *attr2)
511 if (attr1->kind != attr2->kind)
514 switch (attr1->kind) {
515 case ATTRIBUTE_MS_PROPERTY:
516 return property_attribute_equal(attr1->a.property, attr2->a.property);
518 return attribute_arguments_equal(attr1->a.arguments,