1 //===- RecordVisitor.cpp --------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 ///
9 /// Implements the TAPI Record Visitor.
10 ///
11 //===----------------------------------------------------------------------===//
12
13 #include "llvm/TextAPI/RecordVisitor.h"
14
15 using namespace llvm;
16 using namespace llvm::MachO;
17
~RecordVisitor()18 RecordVisitor::~RecordVisitor() {}
visitObjCInterface(const ObjCInterfaceRecord &)19 void RecordVisitor::visitObjCInterface(const ObjCInterfaceRecord &) {}
visitObjCCategory(const ObjCCategoryRecord &)20 void RecordVisitor::visitObjCCategory(const ObjCCategoryRecord &) {}
21
shouldSkipRecord(const Record & R,const bool RecordUndefs)22 static bool shouldSkipRecord(const Record &R, const bool RecordUndefs) {
23 if (R.isExported())
24 return false;
25
26 // Skip non exported symbols unless for flat namespace libraries.
27 return !(RecordUndefs && R.isUndefined());
28 }
29
visitGlobal(const GlobalRecord & GR)30 void SymbolConverter::visitGlobal(const GlobalRecord &GR) {
31 auto [SymName, SymKind, InterfaceType] = parseSymbol(GR.getName());
32 if (shouldSkipRecord(GR, RecordUndefs))
33 return;
34 Symbols->addGlobal(SymKind, SymName, GR.getFlags(), Targ);
35
36 if (InterfaceType == ObjCIFSymbolKind::None) {
37 Symbols->addGlobal(SymKind, SymName, GR.getFlags(), Targ);
38 return;
39 }
40
41 // It is impossible to hold a complete ObjCInterface with a single
42 // GlobalRecord, so continue to treat this symbol a generic global.
43 Symbols->addGlobal(EncodeKind::GlobalSymbol, GR.getName(), GR.getFlags(),
44 Targ);
45 }
46
addIVars(const ArrayRef<ObjCIVarRecord * > IVars,StringRef ContainerName)47 void SymbolConverter::addIVars(const ArrayRef<ObjCIVarRecord *> IVars,
48 StringRef ContainerName) {
49 for (auto *IV : IVars) {
50 if (shouldSkipRecord(*IV, RecordUndefs))
51 continue;
52 std::string Name =
53 ObjCIVarRecord::createScopedName(ContainerName, IV->getName());
54 Symbols->addGlobal(EncodeKind::ObjectiveCInstanceVariable, Name,
55 IV->getFlags(), Targ);
56 }
57 }
58
visitObjCInterface(const ObjCInterfaceRecord & ObjCR)59 void SymbolConverter::visitObjCInterface(const ObjCInterfaceRecord &ObjCR) {
60 if (!shouldSkipRecord(ObjCR, RecordUndefs)) {
61 if (ObjCR.isCompleteInterface()) {
62 Symbols->addGlobal(EncodeKind::ObjectiveCClass, ObjCR.getName(),
63 ObjCR.getFlags(), Targ);
64 if (ObjCR.hasExceptionAttribute())
65 Symbols->addGlobal(EncodeKind::ObjectiveCClassEHType, ObjCR.getName(),
66 ObjCR.getFlags(), Targ);
67 } else {
68 // Because there is not a complete interface, visit individual symbols
69 // instead.
70 if (ObjCR.isExportedSymbol(ObjCIFSymbolKind::EHType))
71 Symbols->addGlobal(EncodeKind::GlobalSymbol,
72 (ObjC2EHTypePrefix + ObjCR.getName()).str(),
73 ObjCR.getFlags(), Targ);
74 if (ObjCR.isExportedSymbol(ObjCIFSymbolKind::Class))
75 Symbols->addGlobal(EncodeKind::GlobalSymbol,
76 (ObjC2ClassNamePrefix + ObjCR.getName()).str(),
77 ObjCR.getFlags(), Targ);
78 if (ObjCR.isExportedSymbol(ObjCIFSymbolKind::MetaClass))
79 Symbols->addGlobal(EncodeKind::GlobalSymbol,
80 (ObjC2MetaClassNamePrefix + ObjCR.getName()).str(),
81 ObjCR.getFlags(), Targ);
82 }
83 }
84
85 addIVars(ObjCR.getObjCIVars(), ObjCR.getName());
86 for (const auto *Cat : ObjCR.getObjCCategories())
87 addIVars(Cat->getObjCIVars(), ObjCR.getName());
88 }
89
visitObjCCategory(const ObjCCategoryRecord & Cat)90 void SymbolConverter::visitObjCCategory(const ObjCCategoryRecord &Cat) {
91 addIVars(Cat.getObjCIVars(), Cat.getSuperClassName());
92 }
93