1 //===- CVSymbolVisitor.cpp --------------------------------------*- C++ -*-===//
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 #include "llvm/DebugInfo/CodeView/CVSymbolVisitor.h"
10
11 #include "llvm/DebugInfo/CodeView/CodeViewError.h"
12 #include "llvm/DebugInfo/CodeView/SymbolVisitorCallbacks.h"
13
14 using namespace llvm;
15 using namespace llvm::codeview;
16
CVSymbolVisitor(SymbolVisitorCallbacks & Callbacks)17 CVSymbolVisitor::CVSymbolVisitor(SymbolVisitorCallbacks &Callbacks)
18 : Callbacks(Callbacks) {}
19
20 template <typename T>
visitKnownRecord(CVSymbol & Record,SymbolVisitorCallbacks & Callbacks)21 static Error visitKnownRecord(CVSymbol &Record,
22 SymbolVisitorCallbacks &Callbacks) {
23 SymbolRecordKind RK = static_cast<SymbolRecordKind>(Record.kind());
24 T KnownRecord(RK);
25 if (auto EC = Callbacks.visitKnownRecord(Record, KnownRecord))
26 return EC;
27 return Error::success();
28 }
29
finishVisitation(CVSymbol & Record,SymbolVisitorCallbacks & Callbacks)30 static Error finishVisitation(CVSymbol &Record,
31 SymbolVisitorCallbacks &Callbacks) {
32 switch (Record.kind()) {
33 default:
34 if (auto EC = Callbacks.visitUnknownSymbol(Record))
35 return EC;
36 break;
37 #define SYMBOL_RECORD(EnumName, EnumVal, Name) \
38 case EnumName: { \
39 if (auto EC = visitKnownRecord<Name>(Record, Callbacks)) \
40 return EC; \
41 break; \
42 }
43 #define SYMBOL_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName) \
44 SYMBOL_RECORD(EnumVal, EnumVal, AliasName)
45 #include "llvm/DebugInfo/CodeView/CodeViewSymbols.def"
46 }
47
48 if (auto EC = Callbacks.visitSymbolEnd(Record))
49 return EC;
50
51 return Error::success();
52 }
53
visitSymbolRecord(CVSymbol & Record)54 Error CVSymbolVisitor::visitSymbolRecord(CVSymbol &Record) {
55 if (auto EC = Callbacks.visitSymbolBegin(Record))
56 return EC;
57 return finishVisitation(Record, Callbacks);
58 }
59
visitSymbolRecord(CVSymbol & Record,uint32_t Offset)60 Error CVSymbolVisitor::visitSymbolRecord(CVSymbol &Record, uint32_t Offset) {
61 if (auto EC = Callbacks.visitSymbolBegin(Record, Offset))
62 return EC;
63 return finishVisitation(Record, Callbacks);
64 }
65
visitSymbolStream(const CVSymbolArray & Symbols)66 Error CVSymbolVisitor::visitSymbolStream(const CVSymbolArray &Symbols) {
67 for (auto I : Symbols) {
68 if (auto EC = visitSymbolRecord(I))
69 return EC;
70 }
71 return Error::success();
72 }
73
visitSymbolStream(const CVSymbolArray & Symbols,uint32_t InitialOffset)74 Error CVSymbolVisitor::visitSymbolStream(const CVSymbolArray &Symbols,
75 uint32_t InitialOffset) {
76 for (auto I : Symbols) {
77 if (auto EC = visitSymbolRecord(I, InitialOffset + Symbols.skew()))
78 return EC;
79 InitialOffset += I.length();
80 }
81 return Error::success();
82 }
83