1 //===- SymbolRecordHelpers.cpp ----------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/DebugInfo/CodeView/SymbolRecordHelpers.h"
11 
12 #include "llvm/ADT/SmallVector.h"
13 #include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
14 
15 using namespace llvm;
16 using namespace llvm::codeview;
17 
18 template <typename RecordT> RecordT createRecord(const CVSymbol &sym) {
19   RecordT record(static_cast<SymbolRecordKind>(sym.kind()));
20   cantFail(SymbolDeserializer::deserializeAs<RecordT>(sym, record));
21   return record;
22 }
23 
24 uint32_t
25 llvm::codeview::getScopeEndOffset(const llvm::codeview::CVSymbol &Sym) {
26   assert(symbolOpensScope(Sym.kind()));
27   switch (Sym.kind()) {
28   case SymbolKind::S_GPROC32:
29   case SymbolKind::S_LPROC32:
30   case SymbolKind::S_GPROC32_ID:
31   case SymbolKind::S_LPROC32_ID:
32   case SymbolKind::S_LPROC32_DPC:
33   case SymbolKind::S_LPROC32_DPC_ID: {
34     ProcSym Proc = createRecord<ProcSym>(Sym);
35     return Proc.End;
36   }
37   case SymbolKind::S_BLOCK32: {
38     BlockSym Block = createRecord<BlockSym>(Sym);
39     return Block.End;
40   }
41   case SymbolKind::S_THUNK32: {
42     Thunk32Sym Thunk = createRecord<Thunk32Sym>(Sym);
43     return Thunk.End;
44   }
45   case SymbolKind::S_INLINESITE: {
46     InlineSiteSym Site = createRecord<InlineSiteSym>(Sym);
47     return Site.End;
48   }
49   default:
50     assert(false && "Unknown record type");
51     return 0;
52   }
53 }
54 
55 CVSymbolArray
56 llvm::codeview::limitSymbolArrayToScope(const CVSymbolArray &Symbols,
57                                         uint32_t ScopeBegin) {
58   CVSymbol Opener = *Symbols.at(ScopeBegin);
59   assert(symbolOpensScope(Opener.kind()));
60   uint32_t EndOffset = getScopeEndOffset(Opener);
61   CVSymbol Closer = *Symbols.at(EndOffset);
62   EndOffset += Closer.RecordData.size();
63   return Symbols.substream(ScopeBegin, EndOffset);
64 }
65