1 //===--- AttributeList.cpp --------------------------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines the AttributeList class implementation
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "clang/Sema/AttributeList.h"
15 #include "clang/AST/Expr.h"
16 #include "clang/Basic/IdentifierTable.h"
17 #include "llvm/ADT/StringSwitch.h"
18 using namespace clang;
19
allocated_size() const20 size_t AttributeList::allocated_size() const {
21 if (IsAvailability) return AttributeFactory::AvailabilityAllocSize;
22 return (sizeof(AttributeList) + NumArgs * sizeof(Expr*));
23 }
24
AttributeFactory()25 AttributeFactory::AttributeFactory() {
26 // Go ahead and configure all the inline capacity. This is just a memset.
27 FreeLists.resize(InlineFreeListsCapacity);
28 }
~AttributeFactory()29 AttributeFactory::~AttributeFactory() {}
30
getFreeListIndexForSize(size_t size)31 static size_t getFreeListIndexForSize(size_t size) {
32 assert(size >= sizeof(AttributeList));
33 assert((size % sizeof(void*)) == 0);
34 return ((size - sizeof(AttributeList)) / sizeof(void*));
35 }
36
allocate(size_t size)37 void *AttributeFactory::allocate(size_t size) {
38 // Check for a previously reclaimed attribute.
39 size_t index = getFreeListIndexForSize(size);
40 if (index < FreeLists.size()) {
41 if (AttributeList *attr = FreeLists[index]) {
42 FreeLists[index] = attr->NextInPool;
43 return attr;
44 }
45 }
46
47 // Otherwise, allocate something new.
48 return Alloc.Allocate(size, llvm::AlignOf<AttributeFactory>::Alignment);
49 }
50
reclaimPool(AttributeList * cur)51 void AttributeFactory::reclaimPool(AttributeList *cur) {
52 assert(cur && "reclaiming empty pool!");
53 do {
54 // Read this here, because we're going to overwrite NextInPool
55 // when we toss 'cur' into the appropriate queue.
56 AttributeList *next = cur->NextInPool;
57
58 size_t size = cur->allocated_size();
59 size_t freeListIndex = getFreeListIndexForSize(size);
60
61 // Expand FreeLists to the appropriate size, if required.
62 if (freeListIndex >= FreeLists.size())
63 FreeLists.resize(freeListIndex+1);
64
65 // Add 'cur' to the appropriate free-list.
66 cur->NextInPool = FreeLists[freeListIndex];
67 FreeLists[freeListIndex] = cur;
68
69 cur = next;
70 } while (cur);
71 }
72
takePool(AttributeList * pool)73 void AttributePool::takePool(AttributeList *pool) {
74 assert(pool);
75
76 // Fast path: this pool is empty.
77 if (!Head) {
78 Head = pool;
79 return;
80 }
81
82 // Reverse the pool onto the current head. This optimizes for the
83 // pattern of pulling a lot of pools into a single pool.
84 do {
85 AttributeList *next = pool->NextInPool;
86 pool->NextInPool = Head;
87 Head = pool;
88 pool = next;
89 } while (pool);
90 }
91
92 AttributeList *
createIntegerAttribute(ASTContext & C,IdentifierInfo * Name,SourceLocation TokLoc,int Arg)93 AttributePool::createIntegerAttribute(ASTContext &C, IdentifierInfo *Name,
94 SourceLocation TokLoc, int Arg) {
95 Expr *IArg = IntegerLiteral::Create(C, llvm::APInt(32, (uint64_t) Arg),
96 C.IntTy, TokLoc);
97 return create(Name, TokLoc, 0, TokLoc, 0, TokLoc, &IArg, 1, 0);
98 }
99
getKind(const IdentifierInfo * Name)100 AttributeList::Kind AttributeList::getKind(const IdentifierInfo *Name) {
101 llvm::StringRef AttrName = Name->getName();
102
103 // Normalize the attribute name, __foo__ becomes foo.
104 if (AttrName.startswith("__") && AttrName.endswith("__"))
105 AttrName = AttrName.substr(2, AttrName.size() - 4);
106
107 return llvm::StringSwitch<AttributeList::Kind>(AttrName)
108 .Case("weak", AT_weak)
109 .Case("weakref", AT_weakref)
110 .Case("objc_arc_weak_reference_unavailable", AT_arc_weakref_unavailable)
111 .Case("pure", AT_pure)
112 .Case("mode", AT_mode)
113 .Case("used", AT_used)
114 .Case("alias", AT_alias)
115 .Case("align", AT_aligned)
116 .Case("cdecl", AT_cdecl)
117 .Case("const", AT_const)
118 .Case("__const", AT_const) // some GCC headers do contain this spelling
119 .Case("blocks", AT_blocks)
120 .Case("format", AT_format)
121 .Case("malloc", AT_malloc)
122 .Case("packed", AT_packed)
123 .Case("unused", AT_unused)
124 .Case("aligned", AT_aligned)
125 .Case("cleanup", AT_cleanup)
126 .Case("naked", AT_naked)
127 .Case("nodebug", AT_nodebug)
128 .Case("nonnull", AT_nonnull)
129 .Case("nothrow", AT_nothrow)
130 .Case("objc_gc", AT_objc_gc)
131 .Case("regparm", AT_regparm)
132 .Case("section", AT_section)
133 .Case("stdcall", AT_stdcall)
134 .Case("annotate", AT_annotate)
135 .Case("fastcall", AT_fastcall)
136 .Case("ibaction", AT_IBAction)
137 .Case("iboutlet", AT_IBOutlet)
138 .Case("iboutletcollection", AT_IBOutletCollection)
139 .Case("noreturn", AT_noreturn)
140 .Case("noinline", AT_noinline)
141 .Case("sentinel", AT_sentinel)
142 .Case("NSObject", AT_nsobject)
143 .Case("dllimport", AT_dllimport)
144 .Case("dllexport", AT_dllexport)
145 .Case("may_alias", AT_may_alias)
146 .Case("base_check", AT_base_check)
147 .Case("deprecated", AT_deprecated)
148 .Case("availability", AT_availability)
149 .Case("visibility", AT_visibility)
150 .Case("destructor", AT_destructor)
151 .Case("format_arg", AT_format_arg)
152 .Case("gnu_inline", AT_gnu_inline)
153 .Case("weak_import", AT_weak_import)
154 .Case("vecreturn", AT_vecreturn)
155 .Case("vector_size", AT_vector_size)
156 .Case("constructor", AT_constructor)
157 .Case("unavailable", AT_unavailable)
158 .Case("overloadable", AT_overloadable)
159 .Case("address_space", AT_address_space)
160 .Case("opencl_image_access", AT_opencl_image_access)
161 .Case("always_inline", AT_always_inline)
162 .Case("returns_twice", IgnoredAttribute)
163 .Case("vec_type_hint", IgnoredAttribute)
164 .Case("objc_exception", AT_objc_exception)
165 .Case("objc_method_family", AT_objc_method_family)
166 .Case("ext_vector_type", AT_ext_vector_type)
167 .Case("neon_vector_type", AT_neon_vector_type)
168 .Case("neon_polyvector_type", AT_neon_polyvector_type)
169 .Case("transparent_union", AT_transparent_union)
170 .Case("analyzer_noreturn", AT_analyzer_noreturn)
171 .Case("warn_unused_result", AT_warn_unused_result)
172 .Case("carries_dependency", AT_carries_dependency)
173 .Case("ns_consumed", AT_ns_consumed)
174 .Case("ns_consumes_self", AT_ns_consumes_self)
175 .Case("ns_returns_autoreleased", AT_ns_returns_autoreleased)
176 .Case("ns_returns_not_retained", AT_ns_returns_not_retained)
177 .Case("ns_returns_retained", AT_ns_returns_retained)
178 .Case("cf_consumed", AT_cf_consumed)
179 .Case("cf_returns_not_retained", AT_cf_returns_not_retained)
180 .Case("cf_returns_retained", AT_cf_returns_retained)
181 .Case("cf_returns_autoreleased", AT_cf_returns_autoreleased)
182 .Case("ns_consumes_self", AT_ns_consumes_self)
183 .Case("ns_consumed", AT_ns_consumed)
184 .Case("objc_ownership", AT_objc_ownership)
185 .Case("objc_precise_lifetime", AT_objc_precise_lifetime)
186 .Case("ownership_returns", AT_ownership_returns)
187 .Case("ownership_holds", AT_ownership_holds)
188 .Case("ownership_takes", AT_ownership_takes)
189 .Case("reqd_work_group_size", AT_reqd_wg_size)
190 .Case("init_priority", AT_init_priority)
191 .Case("no_instrument_function", AT_no_instrument_function)
192 .Case("thiscall", AT_thiscall)
193 .Case("bounded", IgnoredAttribute) // OpenBSD
194 .Case("pascal", AT_pascal)
195 .Case("__cdecl", AT_cdecl)
196 .Case("__stdcall", AT_stdcall)
197 .Case("__fastcall", AT_fastcall)
198 .Case("__thiscall", AT_thiscall)
199 .Case("__pascal", AT_pascal)
200 .Case("constant", AT_constant)
201 .Case("device", AT_device)
202 .Case("global", AT_global)
203 .Case("host", AT_host)
204 .Case("shared", AT_shared)
205 .Case("launch_bounds", AT_launch_bounds)
206 .Case("common", AT_common)
207 .Case("nocommon", AT_nocommon)
208 .Case("opencl_kernel_function", AT_opencl_kernel_function)
209 .Case("uuid", AT_uuid)
210 .Case("pcs", AT_pcs)
211 .Case("ms_struct", AT_MsStruct)
212 .Default(UnknownAttribute);
213 }
214