GCC Code Coverage Report

Directory: ../
File: src/irgenerator/NameMangling.cpp
Date: 2025-12-12 07:25:08
Coverage Exec Excl Total
Lines: 93.4% 156 3 170
Functions: 100.0% 13 0 13
Branches: 59.6% 174 8 300
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 31030 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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 31030 if (!spiceFunc.predefinedMangledName.empty())
24 ✗ return spiceFunc.predefinedMangledName;
25
26 // Check if mangling is required
27
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 31030 if (!spiceFunc.mangleFunctionName)
28 ✗ return spiceFunc.name;
29
30
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 31030 std::stringstream mangledName;
31
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 31030 mangledName << "_Z";
32
33 // This type
34
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 31030 if (spiceFunc.isMethod()) {
35
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 18721 mangledName << "N";
36
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 18721 mangleType(mangledName, spiceFunc.thisType);
37 }
38
39 // Function name
40
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 31030 const std::string name = spiceFunc.name + spiceFunc.mangleSuffix;
41
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 31030 mangledName << name.length() << name;
42
43 // Template types
44
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 31030 bool isSelfGeneric = !spiceFunc.templateTypes.empty();
45
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 31030 if (spiceFunc.isMethod())
46
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 18721 isSelfGeneric = spiceFunc.templateTypes.size() > spiceFunc.thisType.getTemplateTypes().size();
47
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 31030 if (isSelfGeneric) {
48
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 3774 mangledName << "I";
49 // Template types themselves
50
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 10212 for (const GenericType &genericTemplateType : spiceFunc.templateTypes) {
51
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 6438 assert(spiceFunc.typeMapping.contains(genericTemplateType.getSubType()));
52
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 6438 const QualType &actualType = spiceFunc.typeMapping.at(genericTemplateType.getSubType());
53
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 6438 mangleType(mangledName, actualType);
54 }
55
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 3774 mangledName << "E";
56
57 // Insert second end marker to end the nested type
58
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 3774 if (spiceFunc.isMethod())
59
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 557 mangledName << "E";
60
61 // Return type
62
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 3774 if (spiceFunc.isFunction())
63
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 1135 mangleType(mangledName, spiceFunc.returnType);
64 else
65
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 2639 mangledName << "v";
66
67
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 27256 } else if (spiceFunc.isMethod()) {
68
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 18164 mangledName << "E";
69 }
70
71 // Parameter types
72
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 65603 for (const auto &[qualType, isOptional] : spiceFunc.paramList) {
73
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 34573 assert(!isOptional);
74
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 34573 mangleType(mangledName, qualType);
75 }
76
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 31030 if (spiceFunc.paramList.empty())
77
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 9953 mangledName << "v";
78
79 #ifndef NDEBUG
80 31030 const TypeMapping &typeMapping = spiceFunc.typeMapping;
81
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 31030 const bool returnTypeIsFctOrProc = spiceFunc.returnType.getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE});
82
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 34540 const auto paramPredicate = [](const Param &p) { return p.qualType.getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE}); };
83
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 31030 const bool paramTypeIsFctOrProc = std::ranges::any_of(spiceFunc.paramList, paramPredicate);
84 12410 const auto templateTypePredicate = [&](const GenericType &t) {
85
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 12410 return typeMapping.at(t.getSubType()).getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE});
86 31030 };
87
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 31030 const bool templateTypeIsFctOrProc = std::ranges::any_of(spiceFunc.templateTypes, templateTypePredicate);
88
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 31030 if (!returnTypeIsFctOrProc && !paramTypeIsFctOrProc && !templateTypeIsFctOrProc)
89
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 30947 assert(CommonUtil::isValidMangledName(mangledName.str()));
90 #endif
91
92
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 31030 return mangledName.str();
93 31030 }
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 1828 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 */
110 257 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 31521 void NameMangling::mangleName(std::stringstream &out, const std::string &name, bool &nestedType) {
122 31521 std::vector<std::string> fragments;
123
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 31521 std::istringstream ss(name);
124 31521 std::string token;
125
126
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 63042 while (std::getline(ss, token, ':')) {
127
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 31521 std::istringstream subStream(token);
128 31521 std::string subToken;
129
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 63042 while (std::getline(subStream, subToken, '/')) {
130
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 31521 fragments.push_back(subToken);
131 }
132 31521 }
133
134 // Start a nested type if needed. The caller needs to emit the end marker.
135
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 31521 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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 63042 for (const std::string &fragment : fragments) {
142 31521 int fragmentLength = static_cast<int>(fragment.length());
143
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 31521 out << std::to_string(fragmentLength) << fragment;
144 }
145 31521 }
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 75606 void NameMangling::mangleType(std::stringstream &out, QualType qualType) { // NOLINT(*-no-recursion)
156 75606 const Type *type = qualType.getType();
157
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 75606 assert(!qualType.hasAnyGenericParts());
158
159 // Unwrap qualType chain
160
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 75606 assert(!type->typeChain.empty());
161
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 84587 for (size_t i = type->typeChain.size() - 1; i >= 1; i--)
162 8981 mangleTypeChainElement(out, type->typeChain.at(i), false);
163
164 // Qualifiers
165
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 75606 assert(qualType.getQualifiers().isSigned == !qualType.getQualifiers().isUnsigned);
166 75606 const bool signedness = qualType.getQualifiers().isSigned;
167
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 75606 if (qualType.getQualifiers().isConst && type->typeChain.size() > 1)
168 4897 out << "K";
169
170 // Base chain element
171 75606 mangleTypeChainElement(out, type->typeChain.front(), signedness);
172 75606 }
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 84587 void NameMangling::mangleTypeChainElement(std::stringstream &out, const TypeChainElement &chainElement, bool signedness) {
183
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 84587 switch (chainElement.superType) {
184 2438 case TY_PTR:
185
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 2438 out << "P";
186 2438 break;
187 120 case TY_ARRAY:
188
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 120 if (chainElement.data.arraySize == ARRAY_SIZE_UNKNOWN)
189
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 72 out << "P";
190 else
191
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 48 out << "A" << chainElement.data.arraySize << "_";
192 120 break;
193 6423 case TY_REF:
194
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 6423 out << "R";
195 6423 break;
196 2427 case TY_DOUBLE:
197
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 2427 assert(signedness && "Unsigned double types are forbidden");
198
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 2427 out << "d";
199 2427 break;
200 9213 case TY_INT:
201
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 9213 out << (signedness ? "i" : "j");
202 9213 break;
203 2737 case TY_SHORT:
204
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 2737 out << (signedness ? "s" : "t");
205 2737 break;
206 7739 case TY_LONG:
207
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 7739 out << (signedness ? "l" : "m");
208 7739 break;
209 2343 case TY_BYTE:
210
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 2343 out << (signedness ? "a" : "h");
211 2343 break;
212 6558 case TY_CHAR:
213
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 6558 out << "c";
214 6558 break;
215 9937 case TY_STRING:
216
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 9937 out << "PKc";
217 9937 break;
218 3005 case TY_BOOL:
219
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 3005 assert(!signedness && "Signed bool types are forbidden");
220
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 3005 out << "b";
221 3005 break;
222 31521 case TY_STRUCT: // fall-through
223 case TY_INTERFACE: {
224 31521 bool nestedType = false;
225
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 31521 mangleName(out, chainElement.subType, nestedType);
226
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 31521 if (!chainElement.templateTypes.empty()) {
227
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 10041 out << "I";
228
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 22920 for (const QualType &templateType : chainElement.templateTypes)
229
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 12879 mangleType(out, templateType);
230
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 10041 out << "E";
231 }
232
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 31521 if (nestedType)
233 ✗ out << "E";
234 31521 break;
235 }
236 ✗ case TY_ENUM: {
237 ✗ bool nestedType = false;
238 ✗ mangleName(out, chainElement.subType, nestedType);
239 ✗ if (nestedType)
240 ✗ out << "E";
241 ✗ break;
242 }
243 34 case TY_FUNCTION: {
244
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 34 out << (chainElement.data.hasCaptures ? "PFC" : "PF");
245
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 128 for (const QualType &paramType : chainElement.paramTypes)
246
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 94 mangleType(out, paramType);
247
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 34 out << "E";
248 34 break;
249 }
250 92 case TY_PROCEDURE: {
251
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 92 out << (chainElement.data.hasCaptures ? "PFCv" : "PFv");
252
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 151 for (size_t i = 1; i < chainElement.paramTypes.size(); i++)
253
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 59 mangleType(out, chainElement.paramTypes.at(i));
254
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 92 out << "E";
255 92 break;
256 }
257 − default: // GCOV_EXCL_LINE
258 − const std::string message = "Type " + chainElement.getName(false, true, true) + " cannot be mangled"; // GCOV_EXCL_LINE
259 − throw CompilerError(INTERNAL_ERROR, message); // GCOV_EXCL_LINE
260 }
261 84587 }
262
263 386 std::string NameMangling::mangleTypeInfoName(const StructBase *structBase) {
264
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 386 std::stringstream out;
265
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 386 out << "_ZTS";
266
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 386 mangleType(out, structBase->entry->getQualType());
267
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 772 return out.str();
268 386 }
269
270
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 386 std::string NameMangling::mangleTypeInfoValue(const std::string &value) { return std::to_string(value.size()) + value; }
271
272 549 std::string NameMangling::mangleTypeInfo(const StructBase *structBase) {
273
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 549 std::stringstream out;
274
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 549 out << "_ZTI";
275
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 549 mangleType(out, structBase->entry->getQualType());
276
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 1098 return out.str();
277 549 }
278
279 772 std::string NameMangling::mangleVTable(const StructBase *structBase) {
280
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 772 std::stringstream out;
281
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 772 out << "_ZTV";
282
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 772 mangleType(out, structBase->entry->getQualType());
283
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 1544 return out.str();
284 772 }
285
286 338 std::string NameMangling::mangleVTable(const std::string &typeName) {
287
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 338 return "_ZTV" + std::to_string(typeName.size()) + typeName;
288 }
289
290 } // namespace spice::compiler
291