GCC Code Coverage Report

Directory: ../
File: src/irgenerator/NameMangling.cpp
Date: 2025-02-05 01:09:36
Exec Total Coverage
Lines: 151 162 93.2%
Functions: 13 13 100.0%
Branches: 152 251 60.6%
Line Branch Exec Source
1 // Copyright (c) 2021-2025 ChilliBits. All rights reserved.
2
3 #include "NameMangling.h"
4
5 #include <exception/CompilerError.h>
6 #include <model/Function.h>
7 #include <model/Interface.h>
8 #include <model/Struct.h>
9 #include <symboltablebuilder/SymbolTableEntry.h>
10 #include <util/CommonUtil.h>
11
12 namespace spice::compiler {
13
14 /**
15 * Mangle a function or procedure.
16 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
17 *
18 * @param spiceFunc Input function
19 * @return Mangled name
20 */
21 21772 std::string NameMangling::mangleFunction(const Function &spiceFunc) {
22 // Check if we have a predefined mangled name, specified by e.g. a function attribute
23
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 21772 if (!spiceFunc.predefinedMangledName.empty())
24 ✗ return spiceFunc.predefinedMangledName;
25
26 // Check if mangling is required
27
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 21772 if (!spiceFunc.mangleFunctionName)
28 ✗ return spiceFunc.name;
29
30
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 21772 std::stringstream mangledName;
31
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 21772 mangledName << "_Z";
32
33 // This type
34
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 21772 if (spiceFunc.isMethod()) {
35
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 14187 mangledName << "N";
36
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 14187 mangleType(mangledName, spiceFunc.thisType);
37 }
38
39 // Function name
40
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 21772 const std::string name = spiceFunc.name + spiceFunc.mangleSuffix;
41
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 21772 mangledName << name.length() << name;
42
43 // Template types
44
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 21772 bool isSelfGeneric = !spiceFunc.templateTypes.empty();
45
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 21772 if (spiceFunc.isMethod())
46
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 14187 isSelfGeneric = spiceFunc.templateTypes.size() > spiceFunc.thisType.getTemplateTypes().size();
47
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 21772 if (isSelfGeneric) {
48
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 1216 mangledName << "I";
49 // Template types themselves
50
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 2529 for (const GenericType &genericTemplateType : spiceFunc.templateTypes) {
51
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 1313 assert(spiceFunc.typeMapping.contains(genericTemplateType.getSubType()));
52
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 1313 const QualType &actualType = spiceFunc.typeMapping.at(genericTemplateType.getSubType());
53
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 1313 mangleType(mangledName, actualType);
54 }
55
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 1216 mangledName << "E";
56
57 // Insert second end marker to end the nested type
58
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 1216 if (spiceFunc.isMethod())
59
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 388 mangledName << "E";
60
61 // Return type
62
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 1216 if (spiceFunc.isFunction())
63
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 835 mangleType(mangledName, spiceFunc.returnType);
64 else
65
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 381 mangledName << "v";
66
67
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 20556 } else if (spiceFunc.isMethod()) {
68
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 13799 mangledName << "E";
69 }
70
71 // Parameter types
72
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 43634 for (const auto &[qualType, isOptional] : spiceFunc.paramList) {
73
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 21862 assert(!isOptional);
74
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 21862 mangleType(mangledName, qualType);
75 }
76
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 21772 if (spiceFunc.paramList.empty())
77
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 6753 mangledName << "v";
78
79 #ifndef NDEBUG
80 21772 const TypeMapping &typeMapping = spiceFunc.typeMapping;
81
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 21772 const bool returnTypeIsFctOrProc = spiceFunc.returnType.getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE});
82
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 21800 const auto paramPredicate = [](const Param &p) { return p.qualType.getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE}); };
83
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 21772 const bool paramTypeIsFctOrProc = std::ranges::any_of(spiceFunc.paramList, paramPredicate);
84 5693 const auto templateTypePredicate = [&](const GenericType &t) {
85
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 5693 return typeMapping.at(t.getSubType()).getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE});
86 21772 };
87
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 21772 const bool templateTypeIsFctOrProc = std::ranges::any_of(spiceFunc.templateTypes, templateTypePredicate);
88
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 21772 if (!returnTypeIsFctOrProc && !paramTypeIsFctOrProc && !templateTypeIsFctOrProc)
89
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 21658 assert(CommonUtil::isValidMangledName(mangledName.str()));
90 #endif
91
92
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 21772 return mangledName.str();
93 21772 }
94
95 /**
96 * Mangle a struct
97 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
98 *
99 * @param spiceStruct Input struct
100 * @return Mangled name
101 */
102 1386 std::string NameMangling::mangleStruct(const Struct &spiceStruct) { return "struct." + spiceStruct.name; }
103
104 /**
105 * Mangle an interface
106 *
107 * @param spiceInterface Input interface
108 * @return Mangled name
109 */
110 154 std::string NameMangling::mangleInterface(const Interface &spiceInterface) { return "interface." + spiceInterface.name; }
111
112 /**
113 * Mangle a fully qualified name like e.g. test::s1::calledMethod to 4test2s112calledMethod
114 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
115 *
116 * @param out Output string stream
117 * @param name Input name
118 * @param nestedType True if the name is a nested type
119 * @return Mangled name
120 */
121 23977 void NameMangling::mangleName(std::stringstream &out, const std::string &name, bool &nestedType) {
122 23977 std::vector<std::string> fragments;
123
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 23977 std::istringstream ss(name);
124 23977 std::string token;
125
126
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 47954 while (std::getline(ss, token, ':')) {
127
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 23977 std::istringstream subStream(token);
128 23977 std::string subToken;
129
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 47954 while (std::getline(subStream, subToken, '/')) {
130
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 23977 fragments.push_back(subToken);
131 }
132 23977 }
133
134 // Start a nested type if needed. The caller needs to emit the end marker.
135
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 23977 if (fragments.size() > 1) {
136 ✗ out << "N";
137 ✗ nestedType = true;
138 }
139
140 // Process each fragment and append it to the result
141
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 47954 for (const std::string &fragment : fragments) {
142 23977 int fragmentLength = static_cast<int>(fragment.length());
143
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 23977 out << std::to_string(fragmentLength) << fragment;
144 }
145 23977 }
146
147 /**
148 * Mangle a symbol qualType
149 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
150 *
151 * @param out Output string stream
152 * @param qualType Input symbol qualType
153 * @return Mangled name
154 */
155 48292 void NameMangling::mangleType(std::stringstream &out, QualType qualType) { // NOLINT(*-no-recursion)
156 48292 const Type *type = qualType.getType();
157
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 48292 assert(!qualType.hasAnyGenericParts());
158
159 // Unwrap qualType chain
160
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 48292 assert(!type->typeChain.empty());
161
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 55148 for (size_t i = type->typeChain.size() - 1; i >= 1; i--)
162 6856 mangleTypeChainElement(out, type->typeChain.at(i), false);
163
164 // Qualifiers
165
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 48292 assert(qualType.getQualifiers().isSigned == !qualType.getQualifiers().isUnsigned);
166 48292 const bool signedness = qualType.getQualifiers().isSigned;
167
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 48292 if (qualType.getQualifiers().isConst && type->typeChain.size() > 1)
168 3915 out << "K";
169
170 // Base chain element
171 48292 mangleTypeChainElement(out, type->typeChain.front(), signedness);
172 48292 }
173
174 /**
175 * Mangle a type chain element
176 *
177 * @param out Output string stream
178 * @param chainElement Input type chain element
179 * @param signedness Signedness of the type
180 * @return Mangled name
181 */
182 55148 void NameMangling::mangleTypeChainElement(std::stringstream &out, const TypeChainElement &chainElement, bool signedness) {
183
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 55148 switch (chainElement.superType) {
184 1686 case TY_PTR: // fall-through
185 case TY_ARRAY:
186 1686 out << "P";
187 1686 break;
188 5170 case TY_REF:
189 5170 out << "R";
190 5170 break;
191 257 case TY_DOUBLE:
192
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 257 assert(signedness && "Unsigned double types are forbidden");
193 257 out << "d";
194 257 break;
195 4284 case TY_INT:
196
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 4284 out << (signedness ? "i" : "j");
197 4284 break;
198 201 case TY_SHORT:
199
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 201 out << (signedness ? "s" : "t");
200 201 break;
201 3949 case TY_LONG:
202
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 3949 out << (signedness ? "l" : "m");
203 3949 break;
204 1382 case TY_BYTE:
205
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 1382 out << (signedness ? "a" : "h");
206 1382 break;
207 5303 case TY_CHAR:
208
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 5303 out << (signedness ? "c" : "h");
209 5303 break;
210 8308 case TY_STRING:
211 8308 out << "PKc";
212 8308 break;
213 512 case TY_BOOL:
214
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 512 assert(!signedness && "Signed bool types are forbidden");
215 512 out << "b";
216 512 break;
217 23977 case TY_STRUCT: // fall-through
218 case TY_INTERFACE: {
219 23977 bool nestedType = false;
220
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 23977 mangleName(out, chainElement.subType, nestedType);
221
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 23977 if (!chainElement.templateTypes.empty()) {
222
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 7236 out << "I";
223
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 16030 for (const QualType &templateType : chainElement.templateTypes)
224
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 8794 mangleType(out, templateType);
225
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 7236 out << "E";
226 }
227
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 23977 if (nestedType)
228 ✗ out << "E";
229 23977 break;
230 }
231 ✗ case TY_ENUM: {
232 ✗ bool nestedType = false;
233 ✗ mangleName(out, chainElement.subType, nestedType);
234 ✗ if (nestedType)
235 ✗ out << "E";
236 ✗ break;
237 }
238 10 case TY_FUNCTION: {
239
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 10 out << (chainElement.data.hasCaptures ? "PFC" : "PF");
240
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 32 for (const QualType &paramType : chainElement.paramTypes)
241
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 22 mangleType(out, paramType);
242 10 out << "E";
243 10 break;
244 }
245 109 case TY_PROCEDURE: {
246
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 109 out << (chainElement.data.hasCaptures ? "PFCv" : "PFv");
247
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 171 for (size_t i = 1; i < chainElement.paramTypes.size(); i++)
248 62 mangleType(out, chainElement.paramTypes.at(i));
249 109 out << "E";
250 109 break;
251 }
252 − default: // GCOV_EXCL_LINE
253 − throw CompilerError(INTERNAL_ERROR, "Type " + chainElement.getName(false) + " cannot be mangled"); // GCOV_EXCL_LINE
254 }
255 55148 }
256
257 275 std::string NameMangling::mangleTypeInfoName(const StructBase *structBase) {
258
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 275 std::stringstream out;
259
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 275 out << "_ZTS";
260
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 275 mangleType(out, structBase->entry->getQualType());
261
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 550 return out.str();
262 275 }
263
264
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 275 std::string NameMangling::mangleTypeInfoValue(const std::string &value) { return std::to_string(value.size()) + value; }
265
266 392 std::string NameMangling::mangleTypeInfo(const StructBase *structBase) {
267
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 392 std::stringstream out;
268
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 392 out << "_ZTI";
269
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 392 mangleType(out, structBase->entry->getQualType());
270
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 784 return out.str();
271 392 }
272
273 550 std::string NameMangling::mangleVTable(const StructBase *structBase) {
274
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 550 std::stringstream out;
275
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 550 out << "_ZTV";
276
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 550 mangleType(out, structBase->entry->getQualType());
277
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 1100 return out.str();
278 550 }
279
280 237 std::string NameMangling::mangleVTable(const std::string &typeName) {
281
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 237 return "_ZTV" + std::to_string(typeName.size()) + typeName;
282 }
283
284 } // namespace spice::compiler
285