GCC Code Coverage Report

Directory: ../
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 93.5% 159 / 3 / 173
Functions: 100.0% 13 / 0 / 13
Branches: 59.0% 177 / 8 / 308
src/irgenerator/NameMangling.cpp
Line Branch Exec Source
1 // Copyright (c) 2021-2026 ChilliBits. All rights reserved.
2
3 #include "NameMangling.h"
4
5 #include <exception/CompilerError.h>
6 #include <model/Function.h>
7 #include <model/GenericType.h>
8 #include <model/Interface.h>
9 #include <model/Struct.h>
10 #include <symboltablebuilder/SymbolTableEntry.h>
11 #include <symboltablebuilder/Type.h>
12 #include <util/CommonUtil.h>
13
14 namespace spice::compiler {
15
16 /**
17 * Mangle a function or procedure.
18 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
19 *
20 * @param spiceFunc Input function
21 * @return Mangled name
22 */
23 31280 std::string NameMangling::mangleFunction(const Function &spiceFunc) {
24 // Check if we have a predefined mangled name, specified by e.g. a function attribute
25
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 31280 if (!spiceFunc.predefinedMangledName.empty())
26 ✗ return spiceFunc.predefinedMangledName;
27
28 // Check if mangling is required
29
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 31280 if (!spiceFunc.mangleFunctionName)
30 ✗ return spiceFunc.name;
31
32
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 31280 std::stringstream mangledName;
33
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 31280 mangledName << "_Z";
34
35 // This type
36
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 31280 if (spiceFunc.isMethod()) {
37
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 18875 mangledName << "N";
38
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 18875 mangleType(mangledName, spiceFunc.thisType);
39 }
40
41 // Function name
42
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 31280 const std::string name = spiceFunc.name + spiceFunc.mangleSuffix;
43
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 31280 mangledName << name.length() << name;
44
45 // Template types
46
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 31280 bool isSelfGeneric = !spiceFunc.templateTypes.empty();
47
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 31280 if (spiceFunc.isMethod())
48
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 18875 isSelfGeneric = spiceFunc.templateTypes.size() > spiceFunc.thisType.getTemplateTypes().size();
49
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 31280 if (isSelfGeneric) {
50
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 3778 mangledName << "I";
51 // Template types themselves
52
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 10226 for (const GenericType &genericTemplateType : spiceFunc.templateTypes) {
53
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 6448 assert(spiceFunc.typeMapping.contains(genericTemplateType.getSubType()));
54
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 6448 const QualType &actualType = spiceFunc.typeMapping.at(genericTemplateType.getSubType());
55
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 6448 mangleType(mangledName, actualType);
56 }
57
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 3778 mangledName << "E";
58
59 // Insert second end marker to end the nested type
60
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 3778 if (spiceFunc.isMethod())
61
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 565 mangledName << "E";
62
63 // Return type
64
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 3778 if (spiceFunc.isFunction())
65
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 1135 mangleType(mangledName, spiceFunc.returnType);
66 else
67
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 2643 mangledName << "v";
68
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 27502 } else if (spiceFunc.isMethod()) {
69
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 18310 mangledName << "E";
70 }
71
72 // Parameter types
73
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 66148 for (const auto &[qualType, isOptional] : spiceFunc.paramList) {
74
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 34868 assert(!isOptional);
75
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 34868 mangleType(mangledName, qualType);
76 }
77
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 31280 if (spiceFunc.paramList.empty())
78
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 10020 mangledName << "v";
79
80 #ifndef NDEBUG
81 31280 const TypeMapping &typeMapping = spiceFunc.typeMapping;
82
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 31280 const bool returnTypeIsFctOrProc = spiceFunc.returnType.getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE});
83
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 34835 const auto paramPredicate = [](const Param &p) { return p.qualType.getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE}); };
84
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 31280 const bool paramTypeIsFctOrProc = std::ranges::any_of(spiceFunc.paramList, paramPredicate);
85 12349 const auto templateTypePredicate = [&](const GenericType &t) {
86
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 12349 if (t.is(TY_GENERIC)) {
87
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 12345 assert(typeMapping.contains(t.getSubType()));
88
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 12345 return typeMapping.at(t.getSubType()).getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE});
89 }
90
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 4 return t.getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE});
91 31280 };
92
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 31280 const bool templateTypeIsFctOrProc = std::ranges::any_of(spiceFunc.templateTypes, templateTypePredicate);
93
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 31280 if (!returnTypeIsFctOrProc && !paramTypeIsFctOrProc && !templateTypeIsFctOrProc)
94
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 31236 assert(CommonUtil::isValidMangledName(mangledName.str()));
95 #endif
96
97
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 31280 return mangledName.str();
98 31280 }
99
100 /**
101 * Mangle a struct
102 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
103 *
104 * @param spiceStruct Input struct
105 * @return Mangled name
106 */
107 1815 std::string NameMangling::mangleStruct(const Struct &spiceStruct) { return "struct." + spiceStruct.name; }
108
109 /**
110 * Mangle an interface
111 *
112 * @param spiceInterface Input interface
113 * @return Mangled name
114 */
115 257 std::string NameMangling::mangleInterface(const Interface &spiceInterface) { return "interface." + spiceInterface.name; }
116
117 /**
118 * Mangle a fully qualified name like e.g. test::s1::calledMethod to 4test2s112calledMethod
119 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
120 *
121 * @param out Output string stream
122 * @param name Input name
123 * @param nestedType True if the name is a nested type
124 * @return Mangled name
125 */
126 31744 void NameMangling::mangleName(std::stringstream &out, const std::string &name, bool &nestedType) {
127 31744 std::vector<std::string> fragments;
128
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 31744 std::istringstream ss(name);
129 31744 std::string token;
130
131
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 63488 while (std::getline(ss, token, ':')) {
132
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 31744 std::istringstream subStream(token);
133 31744 std::string subToken;
134
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 63488 while (std::getline(subStream, subToken, '/')) {
135
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 31744 fragments.push_back(subToken);
136 }
137 31744 }
138
139 // Start a nested type if needed. The caller needs to emit the end marker.
140
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 31744 if (fragments.size() > 1) {
141 ✗ out << "N";
142 ✗ nestedType = true;
143 }
144
145 // Process each fragment and append it to the result
146
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 63488 for (const std::string &fragment : fragments) {
147 31744 int fragmentLength = static_cast<int>(fragment.length());
148
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 31744 out << std::to_string(fragmentLength) << fragment;
149 }
150 31744 }
151
152 /**
153 * Mangle a symbol qualType
154 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
155 *
156 * @param out Output string stream
157 * @param qualType Input symbol qualType
158 * @return Mangled name
159 */
160 76025 void NameMangling::mangleType(std::stringstream &out, const QualType &qualType) { // NOLINT(*-no-recursion)
161 76025 const Type *type = qualType.getType();
162
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 76025 assert(!qualType.hasAnyGenericParts());
163
164 // Unwrap qualType chain
165
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 76025 assert(!type->typeChain.empty());
166
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 84994 for (size_t i = type->typeChain.size() - 1; i >= 1; i--)
167 8969 mangleTypeChainElement(out, type->typeChain.at(i), false);
168
169 // Qualifiers
170
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 76025 assert(qualType.getQualifiers().isSigned == !qualType.getQualifiers().isUnsigned);
171 76025 const bool signedness = qualType.getQualifiers().isSigned;
172
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 76025 if (qualType.getQualifiers().isConst && type->typeChain.size() > 1)
173 4933 out << "K";
174
175 // Base chain element
176 76025 mangleTypeChainElement(out, type->typeChain.front(), signedness);
177 76025 }
178
179 /**
180 * Mangle a type chain element
181 *
182 * @param out Output string stream
183 * @param chainElement Input type chain element
184 * @param signedness Signedness of the type
185 * @return Mangled name
186 */
187 84994 void NameMangling::mangleTypeChainElement(std::stringstream &out, const TypeChainElement &chainElement, bool signedness) {
188
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 84994 switch (chainElement.superType) {
189 2390 case TY_PTR:
190
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 2390 out << "P";
191 2390 break;
192 120 case TY_ARRAY:
193
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 120 if (chainElement.data.arraySize == ARRAY_SIZE_UNKNOWN)
194
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 72 out << "P";
195 else
196
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 48 out << "A" << chainElement.data.arraySize << "_";
197 120 break;
198 6459 case TY_REF:
199
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 6459 out << "R";
200 6459 break;
201 2431 case TY_DOUBLE:
202
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 2431 assert(signedness && "Unsigned double types are forbidden");
203
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 2431 out << "d";
204 2431 break;
205 9222 case TY_INT:
206
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 9222 out << (signedness ? "i" : "j");
207 9222 break;
208 2714 case TY_SHORT:
209
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 2714 out << (signedness ? "s" : "t");
210 2714 break;
211 7781 case TY_LONG:
212
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 7781 out << (signedness ? "l" : "m");
213 7781 break;
214 2291 case TY_BYTE:
215
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 2291 out << (signedness ? "a" : "h");
216 2291 break;
217 6692 case TY_CHAR:
218
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 6692 out << "c";
219 6692 break;
220 10055 case TY_STRING:
221
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 10055 out << "PKc";
222 10055 break;
223 3011 case TY_BOOL:
224
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 3011 assert(!signedness && "Signed bool types are forbidden");
225
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 3011 out << "b";
226 3011 break;
227 31744 case TY_STRUCT: // fall-through
228 case TY_INTERFACE: {
229 31744 bool nestedType = false;
230
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 31744 mangleName(out, chainElement.subType, nestedType);
231
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 31744 if (!chainElement.templateTypes.empty()) {
232
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 9964 out << "I";
233
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 22768 for (const QualType &templateType : chainElement.templateTypes)
234
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 12804 mangleType(out, templateType);
235
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 9964 out << "E";
236 }
237
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 31744 if (nestedType)
238 ✗ out << "E";
239 31744 break;
240 }
241 ✗ case TY_ENUM: {
242 ✗ bool nestedType = false;
243 ✗ mangleName(out, chainElement.subType, nestedType);
244 ✗ if (nestedType)
245 ✗ out << "E";
246 ✗ break;
247 }
248 34 case TY_FUNCTION: {
249
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 34 out << (chainElement.data.hasCaptures ? "PFC" : "PF");
250
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 128 for (const QualType &paramType : chainElement.paramTypes)
251
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 94 mangleType(out, paramType);
252
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 34 out << "E";
253 34 break;
254 }
255 50 case TY_PROCEDURE: {
256
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 50 out << (chainElement.data.hasCaptures ? "PFCv" : "PFv");
257
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 109 for (size_t i = 1; i < chainElement.paramTypes.size(); i++)
258
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 59 mangleType(out, chainElement.paramTypes.at(i));
259
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 50 out << "E";
260 50 break;
261 }
262 − default: // GCOV_EXCL_LINE
263 − const std::string message = "Type " + chainElement.getName(false, true, true) + " cannot be mangled"; // GCOV_EXCL_LINE
264 − throw CompilerError(INTERNAL_ERROR, message); // GCOV_EXCL_LINE
265 }
266 84994 }
267
268 394 std::string NameMangling::mangleTypeInfoName(const StructBase *structBase) {
269
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 394 std::stringstream out;
270
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 394 out << "_ZTS";
271
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 394 mangleType(out, structBase->entry->getQualType());
272
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 788 return out.str();
273 394 }
274
275
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 394 std::string NameMangling::mangleTypeInfoValue(const std::string &value) { return std::to_string(value.size()) + value; }
276
277 560 std::string NameMangling::mangleTypeInfo(const StructBase *structBase) {
278
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 560 std::stringstream out;
279
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 560 out << "_ZTI";
280
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 560 mangleType(out, structBase->entry->getQualType());
281
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 1120 return out.str();
282 560 }
283
284 788 std::string NameMangling::mangleVTable(const StructBase *structBase) {
285
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 788 std::stringstream out;
286
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 788 out << "_ZTV";
287
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 788 mangleType(out, structBase->entry->getQualType());
288
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 1576 return out.str();
289 788 }
290
291 344 std::string NameMangling::mangleVTable(const std::string &typeName) {
292
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 344 return "_ZTV" + std::to_string(typeName.size()) + typeName;
293 }
294
295 } // namespace spice::compiler
296