1//===- SymbolRecordHelpers.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/SymbolRecordHelpers.h"
10
11#include "llvm/ADT/ArrayRef.h"
12#include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
13
14using namespace llvm;
15using namespace llvm::codeview;
16
17template <typename RecordT> static RecordT createRecord(const CVSymbol &sym) {
18 RecordT record(static_cast<SymbolRecordKind>(sym.kind()));
19 cantFail(SymbolDeserializer::deserializeAs<RecordT>(sym, record));
20 return record;
21}
22
23uint32_t llvm::codeview::getScopeEndOffset(const CVSymbol &Sym) {
24 assert(symbolOpensScope(Sym.kind()));
25 switch (Sym.kind()) {
26 case SymbolKind::S_GPROC32:
27 case SymbolKind::S_LPROC32:
28 case SymbolKind::S_GPROC32_ID:
29 case SymbolKind::S_LPROC32_ID:
30 case SymbolKind::S_LPROC32_DPC:
31 case SymbolKind::S_LPROC32_DPC_ID: {
32 ProcSym Proc = createRecord<ProcSym>(sym: Sym);
33 return Proc.End;
34 }
35 case SymbolKind::S_BLOCK32: {
36 BlockSym Block = createRecord<BlockSym>(sym: Sym);
37 return Block.End;
38 }
39 case SymbolKind::S_THUNK32: {
40 Thunk32Sym Thunk = createRecord<Thunk32Sym>(sym: Sym);
41 return Thunk.End;
42 }
43 case SymbolKind::S_INLINESITE: {
44 InlineSiteSym Site = createRecord<InlineSiteSym>(sym: Sym);
45 return Site.End;
46 }
47 default:
48 assert(false && "Unknown record type");
49 return 0;
50 }
51}
52
53uint32_t
54llvm::codeview::getScopeParentOffset(const llvm::codeview::CVSymbol &Sym) {
55 assert(symbolOpensScope(Sym.kind()));
56 switch (Sym.kind()) {
57 case SymbolKind::S_GPROC32:
58 case SymbolKind::S_LPROC32:
59 case SymbolKind::S_GPROC32_ID:
60 case SymbolKind::S_LPROC32_ID:
61 case SymbolKind::S_LPROC32_DPC:
62 case SymbolKind::S_LPROC32_DPC_ID: {
63 ProcSym Proc = createRecord<ProcSym>(sym: Sym);
64 return Proc.Parent;
65 }
66 case SymbolKind::S_BLOCK32: {
67 BlockSym Block = createRecord<BlockSym>(sym: Sym);
68 return Block.Parent;
69 }
70 case SymbolKind::S_THUNK32: {
71 Thunk32Sym Thunk = createRecord<Thunk32Sym>(sym: Sym);
72 return Thunk.Parent;
73 }
74 case SymbolKind::S_INLINESITE: {
75 InlineSiteSym Site = createRecord<InlineSiteSym>(sym: Sym);
76 return Site.Parent;
77 }
78 default:
79 assert(false && "Unknown record type");
80 return 0;
81 }
82}
83
84CVSymbolArray
85llvm::codeview::limitSymbolArrayToScope(const CVSymbolArray &Symbols,
86 uint32_t ScopeBegin) {
87 CVSymbol Opener = *Symbols.at(Offset: ScopeBegin);
88 assert(symbolOpensScope(Opener.kind()));
89 uint32_t EndOffset = getScopeEndOffset(Sym: Opener);
90 CVSymbol Closer = *Symbols.at(Offset: EndOffset);
91 EndOffset += Closer.RecordData.size();
92 return Symbols.substream(Begin: ScopeBegin, End: EndOffset);
93}
94