GCC Code Coverage Report

Directory: ../
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 93.8% 167 / 3 / 181
Functions: 100.0% 15 / 0 / 15
Branches: 60.5% 179 / 8 / 304
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 #ifndef NDEBUG
17 /**
18 * Recursively check whether a type contains a function or procedure type anywhere - directly or nested as a
19 * struct template argument (e.g. Lambda<p()>). Spice mangles function/procedure types in a way that is not valid
20 * Itanium ABI, so such signatures must be excluded from the demangle-based sanity check in mangleFunction.
21 */
22 256727 static bool containsFctOrProcType(const QualType &type) {
23
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 256727 const QualType base = type.getBase();
24
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 256727 if (base.isOneOf({TY_FUNCTION, TY_PROCEDURE}))
25 339 return true;
26
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 256388 if (base.is(TY_STRUCT)) {
27 32854 const auto pred = [](const QualType &templateType) { return containsFctOrProcType(templateType); };
28
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 79348 return std::ranges::any_of(base.getTemplateTypes(), pred);
29 }
30 177040 return false;
31 }
32 #endif
33
34 /**
35 * Mangle a function or procedure.
36 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
37 *
38 * @param spiceFunc Input function
39 * @return Mangled name
40 */
41 96270 std::string NameMangling::mangleFunction(const Function &spiceFunc) {
42 // Check if we have a predefined mangled name, specified by e.g. a function attribute
43
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 96270 if (!spiceFunc.predefinedMangledName.empty())
44 ✗ return spiceFunc.predefinedMangledName;
45
46 // Check if mangling is required
47
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 96270 if (!spiceFunc.mangleFunctionName)
48 ✗ return spiceFunc.name;
49
50
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 96270 std::stringstream mangledName;
51
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 96270 mangledName << "_Z";
52
53 // This type
54
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 96270 if (spiceFunc.isMethod()) {
55
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 70337 mangledName << "N";
56
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 70337 mangleType(mangledName, spiceFunc.thisType);
57 }
58
59 // Function name
60
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 96270 const std::string name = spiceFunc.name + spiceFunc.mangleSuffix;
61
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 96270 mangledName << name.length() << name;
62
63 // Template types
64
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 96270 bool isSelfGeneric = !spiceFunc.templateTypes.empty();
65
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 96270 if (spiceFunc.isMethod())
66
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 70337 isSelfGeneric = spiceFunc.templateTypes.size() > spiceFunc.thisType.getTemplateTypes().size();
67
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 96270 if (isSelfGeneric) {
68
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 7374 mangledName << "I";
69 // Template types themselves
70
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 25766 for (const GenericType &genericTemplateType : spiceFunc.templateTypes) {
71
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 11018 assert(spiceFunc.typeMapping.contains(genericTemplateType.getSubType()));
72
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 11018 const QualType &actualType = spiceFunc.typeMapping.at(genericTemplateType.getSubType());
73
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 11018 mangleType(mangledName, actualType);
74 }
75
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 7374 mangledName << "E";
76
77 // Insert second end marker to end the nested type
78
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 7374 if (spiceFunc.isMethod())
79
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 2091 mangledName << "E";
80
81 // Return type
82
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 7374 if (spiceFunc.isFunction())
83
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 3738 mangleType(mangledName, spiceFunc.returnType);
84 else
85
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 3636 mangledName << "v";
86
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 88896 } else if (spiceFunc.isMethod()) {
87
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 68246 mangledName << "E";
88 }
89
90 // Parameter types
91
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 278787 for (const auto &[qualType, isOptional] : spiceFunc.paramList) {
92
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 86247 assert(!isOptional);
93
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 86247 mangleType(mangledName, qualType);
94 }
95
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 96270 if (spiceFunc.paramList.empty())
96
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 38863 mangledName << "v";
97
98 #ifndef NDEBUG
99 96270 const TypeMapping &typeMapping = spiceFunc.typeMapping;
100
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 96270 const bool returnTypeIsFctOrProc = containsFctOrProcType(spiceFunc.returnType);
101 86173 const auto paramPredicate = [](const Param &p) { return containsFctOrProcType(p.qualType); };
102
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 96270 const bool paramTypeIsFctOrProc = std::ranges::any_of(spiceFunc.paramList, paramPredicate);
103 137700 const auto templateTypePredicate = [&](const GenericType &t) {
104
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 41430 if (t.is(TY_GENERIC)) {
105
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 41426 assert(typeMapping.contains(t.getSubType()));
106 41426 return containsFctOrProcType(typeMapping.at(t.getSubType()));
107 }
108 4 return containsFctOrProcType(t);
109 96270 };
110
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 96270 const bool templateTypeIsFctOrProc = std::ranges::any_of(spiceFunc.templateTypes, templateTypePredicate);
111
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 96270 if (!returnTypeIsFctOrProc && !paramTypeIsFctOrProc && !templateTypeIsFctOrProc)
112
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 96015 assert(CommonUtil::isValidMangledName(mangledName.str()));
113 #endif
114
115
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 96270 return mangledName.str();
116 96270 }
117
118 /**
119 * Mangle a struct
120 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
121 *
122 * @param spiceStruct Input struct
123 * @return Mangled name
124 */
125 8569 std::string NameMangling::mangleStruct(const Struct &spiceStruct) { return "struct." + spiceStruct.name; }
126
127 /**
128 * Mangle an interface
129 *
130 * @param spiceInterface Input interface
131 * @return Mangled name
132 */
133 1136 std::string NameMangling::mangleInterface(const Interface &spiceInterface) { return "interface." + spiceInterface.name; }
134
135 /**
136 * Mangle a fully qualified name like e.g. test::s1::calledMethod to 4test2s112calledMethod
137 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
138 *
139 * @param out Output string stream
140 * @param name Input name
141 * @param nestedType True if the name is a nested type
142 * @return Mangled name
143 */
144 155499 void NameMangling::mangleName(std::stringstream &out, const std::string &name, bool &nestedType) {
145 155499 std::vector<std::string> fragments;
146
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 155499 std::istringstream ss(name);
147 155499 std::string token;
148
149
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 310998 while (std::getline(ss, token, ':')) {
150
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 155499 std::istringstream subStream(token);
151 155499 std::string subToken;
152
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 310998 while (std::getline(subStream, subToken, '/')) {
153
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 155499 fragments.push_back(subToken);
154 }
155 155499 }
156
157 // Start a nested type if needed. The caller needs to emit the end marker.
158
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 155499 if (fragments.size() > 1) {
159 ✗ out << "N";
160 ✗ nestedType = true;
161 }
162
163 // Process each fragment and append it to the result
164
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 466497 for (const std::string &fragment : fragments) {
165 155499 int fragmentLength = static_cast<int>(fragment.length());
166
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 155499 out << std::to_string(fragmentLength) << fragment;
167 }
168 155499 }
169
170 /**
171 * Mangle a symbol qualType
172 * This should be mostly compatible with the C++ Itanium ABI name mangling scheme.
173 *
174 * @param out Output string stream
175 * @param qualType Input symbol qualType
176 * @return Mangled name
177 */
178 250855 void NameMangling::mangleType(std::stringstream &out, const QualType &qualType) { // NOLINT(*-no-recursion)
179 250855 const Type *type = qualType.getType();
180
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 250855 assert(!qualType.hasAnyGenericParts());
181
182 // Unwrap qualType chain
183
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 250855 assert(!type->typeChain.empty());
184
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 296790 for (size_t i = type->typeChain.size() - 1; i >= 1; i--)
185 45935 mangleTypeChainElement(out, type->typeChain.at(i), false);
186
187 // Qualifiers
188
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 250855 assert(qualType.getQualifiers().isSigned == !qualType.getQualifiers().isUnsigned);
189 250855 const bool signedness = qualType.getQualifiers().isSigned;
190
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 250855 if (qualType.getQualifiers().isConst && type->typeChain.size() > 1)
191 19103 out << "K";
192
193 // Base chain element
194 250855 mangleTypeChainElement(out, type->typeChain.front(), signedness);
195 250855 }
196
197 /**
198 * Mangle a type chain element
199 *
200 * @param out Output string stream
201 * @param chainElement Input type chain element
202 * @param signedness Signedness of the type
203 * @return Mangled name
204 */
205 296790 void NameMangling::mangleTypeChainElement(std::stringstream &out, const TypeChainElement &chainElement, bool signedness) {
206
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 296790 switch (chainElement.superType) {
207 19737 case TY_PTR:
208
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 19737 out << "P";
209 19737 break;
210 415 case TY_ARRAY:
211
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 415 if (chainElement.data.arraySize == ARRAY_SIZE_UNKNOWN)
212
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 355 out << "P";
213 else
214
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 60 out << "A" << chainElement.data.arraySize << "_";
215 415 break;
216 25783 case TY_REF:
217
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 25783 out << "R";
218 25783 break;
219 3100 case TY_DOUBLE:
220
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 3100 assert(signedness && "Unsigned double types are forbidden");
221
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 3100 out << "d";
222 3100 break;
223 24356 case TY_INT:
224
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 24356 out << (signedness ? "i" : "j");
225 24356 break;
226 3050 case TY_SHORT:
227
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 3050 out << (signedness ? "s" : "t");
228 3050 break;
229 19132 case TY_LONG:
230
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 19132 out << (signedness ? "l" : "m");
231 19132 break;
232 6694 case TY_BYTE:
233
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 6694 out << (signedness ? "a" : "h");
234 6694 break;
235 11013 case TY_CHAR:
236
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 11013 out << "c";
237 11013 break;
238 21163 case TY_STRING:
239
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 21163 out << "PKc";
240 21163 break;
241 6481 case TY_BOOL:
242
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 6481 assert(!signedness && "Signed bool types are forbidden");
243
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 6481 out << "b";
244 6481 break;
245 155499 case TY_STRUCT: // fall-through
246 case TY_INTERFACE: {
247 155499 bool nestedType = false;
248
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 155499 mangleName(out, chainElement.subType, nestedType);
249
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 155499 if (!chainElement.templateTypes.empty()) {
250
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 56814 out << "I";
251
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 183279 for (const QualType &templateType : chainElement.templateTypes)
252
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 69651 mangleType(out, templateType);
253
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 56814 out << "E";
254 }
255
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 155499 if (nestedType)
256 ✗ out << "E";
257 155499 break;
258 }
259 ✗ case TY_ENUM: {
260 ✗ bool nestedType = false;
261 ✗ mangleName(out, chainElement.subType, nestedType);
262 ✗ if (nestedType)
263 ✗ out << "E";
264 ✗ break;
265 }
266 93 case TY_FUNCTION: {
267
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 93 out << (chainElement.data.hasCaptures ? "PFC" : "PF");
268
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 398 for (const QualType &paramType : chainElement.paramTypes)
269
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 212 mangleType(out, paramType);
270
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 93 out << "E";
271 93 break;
272 }
273 274 case TY_PROCEDURE: {
274
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 274 out << (chainElement.data.hasCaptures ? "PFCv" : "PFv");
275
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 389 for (size_t i = 1; i < chainElement.paramTypes.size(); i++)
276
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 115 mangleType(out, chainElement.paramTypes.at(i));
277
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 274 out << "E";
278 274 break;
279 }
280 − default: // GCOV_EXCL_LINE
281 − const std::string message = "Type " + chainElement.getName(false, true, true) + " cannot be mangled"; // GCOV_EXCL_LINE
282 − throw CompilerError(INTERNAL_ERROR, message); // GCOV_EXCL_LINE
283 }
284 296790 }
285
286 2138 std::string NameMangling::mangleTypeInfoName(const StructBase *structBase) {
287
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 2138 std::stringstream out;
288
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 2138 out << "_ZTS";
289
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 2138 mangleType(out, structBase->entry->getQualType());
290
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 4276 return out.str();
291 2138 }
292
293
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 4276 std::string NameMangling::mangleTypeInfoValue(const std::string &value) { return std::to_string(value.size()) + value; }
294
295 3123 std::string NameMangling::mangleTypeInfo(const StructBase *structBase) {
296
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 3123 std::stringstream out;
297
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 3123 out << "_ZTI";
298
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 3123 mangleType(out, structBase->entry->getQualType());
299
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 6246 return out.str();
300 3123 }
301
302 4276 std::string NameMangling::mangleVTable(const StructBase *structBase) {
303
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 4276 std::stringstream out;
304
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 4276 out << "_ZTV";
305
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 4276 mangleType(out, structBase->entry->getQualType());
306
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 8552 return out.str();
307 4276 }
308
309 2054 std::string NameMangling::mangleVTable(const std::string &typeName) {
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 4108 return "_ZTV" + std::to_string(typeName.size()) + typeName;
311 }
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313 } // namespace spice::compiler
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