1*0b57cec5SDimitry Andric //===- SymbolRecordHelpers.cpp ----------------------------------*- C++ -*-===//
2*0b57cec5SDimitry Andric //
3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6*0b57cec5SDimitry Andric //
7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===//
8*0b57cec5SDimitry Andric 
9*0b57cec5SDimitry Andric #include "llvm/DebugInfo/CodeView/SymbolRecordHelpers.h"
10*0b57cec5SDimitry Andric 
11*0b57cec5SDimitry Andric #include "llvm/ADT/ArrayRef.h"
12*0b57cec5SDimitry Andric #include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
13*0b57cec5SDimitry Andric 
14*0b57cec5SDimitry Andric using namespace llvm;
15*0b57cec5SDimitry Andric using namespace llvm::codeview;
16*0b57cec5SDimitry Andric 
createRecord(const CVSymbol & sym)17*0b57cec5SDimitry Andric template <typename RecordT> static RecordT createRecord(const CVSymbol &sym) {
18*0b57cec5SDimitry Andric   RecordT record(static_cast<SymbolRecordKind>(sym.kind()));
19*0b57cec5SDimitry Andric   cantFail(SymbolDeserializer::deserializeAs<RecordT>(sym, record));
20*0b57cec5SDimitry Andric   return record;
21*0b57cec5SDimitry Andric }
22*0b57cec5SDimitry Andric 
getScopeEndOffset(const CVSymbol & Sym)23*0b57cec5SDimitry Andric uint32_t llvm::codeview::getScopeEndOffset(const CVSymbol &Sym) {
24*0b57cec5SDimitry Andric   assert(symbolOpensScope(Sym.kind()));
25*0b57cec5SDimitry Andric   switch (Sym.kind()) {
26*0b57cec5SDimitry Andric   case SymbolKind::S_GPROC32:
27*0b57cec5SDimitry Andric   case SymbolKind::S_LPROC32:
28*0b57cec5SDimitry Andric   case SymbolKind::S_GPROC32_ID:
29*0b57cec5SDimitry Andric   case SymbolKind::S_LPROC32_ID:
30*0b57cec5SDimitry Andric   case SymbolKind::S_LPROC32_DPC:
31*0b57cec5SDimitry Andric   case SymbolKind::S_LPROC32_DPC_ID: {
32*0b57cec5SDimitry Andric     ProcSym Proc = createRecord<ProcSym>(Sym);
33*0b57cec5SDimitry Andric     return Proc.End;
34*0b57cec5SDimitry Andric   }
35*0b57cec5SDimitry Andric   case SymbolKind::S_BLOCK32: {
36*0b57cec5SDimitry Andric     BlockSym Block = createRecord<BlockSym>(Sym);
37*0b57cec5SDimitry Andric     return Block.End;
38*0b57cec5SDimitry Andric   }
39*0b57cec5SDimitry Andric   case SymbolKind::S_THUNK32: {
40*0b57cec5SDimitry Andric     Thunk32Sym Thunk = createRecord<Thunk32Sym>(Sym);
41*0b57cec5SDimitry Andric     return Thunk.End;
42*0b57cec5SDimitry Andric   }
43*0b57cec5SDimitry Andric   case SymbolKind::S_INLINESITE: {
44*0b57cec5SDimitry Andric     InlineSiteSym Site = createRecord<InlineSiteSym>(Sym);
45*0b57cec5SDimitry Andric     return Site.End;
46*0b57cec5SDimitry Andric   }
47*0b57cec5SDimitry Andric   default:
48*0b57cec5SDimitry Andric     assert(false && "Unknown record type");
49*0b57cec5SDimitry Andric     return 0;
50*0b57cec5SDimitry Andric   }
51*0b57cec5SDimitry Andric }
52*0b57cec5SDimitry Andric 
53*0b57cec5SDimitry Andric uint32_t
getScopeParentOffset(const llvm::codeview::CVSymbol & Sym)54*0b57cec5SDimitry Andric llvm::codeview::getScopeParentOffset(const llvm::codeview::CVSymbol &Sym) {
55*0b57cec5SDimitry Andric   assert(symbolOpensScope(Sym.kind()));
56*0b57cec5SDimitry Andric   switch (Sym.kind()) {
57*0b57cec5SDimitry Andric   case SymbolKind::S_GPROC32:
58*0b57cec5SDimitry Andric   case SymbolKind::S_LPROC32:
59*0b57cec5SDimitry Andric   case SymbolKind::S_GPROC32_ID:
60*0b57cec5SDimitry Andric   case SymbolKind::S_LPROC32_ID:
61*0b57cec5SDimitry Andric   case SymbolKind::S_LPROC32_DPC:
62*0b57cec5SDimitry Andric   case SymbolKind::S_LPROC32_DPC_ID: {
63*0b57cec5SDimitry Andric     ProcSym Proc = createRecord<ProcSym>(Sym);
64*0b57cec5SDimitry Andric     return Proc.Parent;
65*0b57cec5SDimitry Andric   }
66*0b57cec5SDimitry Andric   case SymbolKind::S_BLOCK32: {
67*0b57cec5SDimitry Andric     BlockSym Block = createRecord<BlockSym>(Sym);
68*0b57cec5SDimitry Andric     return Block.Parent;
69*0b57cec5SDimitry Andric   }
70*0b57cec5SDimitry Andric   case SymbolKind::S_THUNK32: {
71*0b57cec5SDimitry Andric     Thunk32Sym Thunk = createRecord<Thunk32Sym>(Sym);
72*0b57cec5SDimitry Andric     return Thunk.Parent;
73*0b57cec5SDimitry Andric   }
74*0b57cec5SDimitry Andric   case SymbolKind::S_INLINESITE: {
75*0b57cec5SDimitry Andric     InlineSiteSym Site = createRecord<InlineSiteSym>(Sym);
76*0b57cec5SDimitry Andric     return Site.Parent;
77*0b57cec5SDimitry Andric   }
78*0b57cec5SDimitry Andric   default:
79*0b57cec5SDimitry Andric     assert(false && "Unknown record type");
80*0b57cec5SDimitry Andric     return 0;
81*0b57cec5SDimitry Andric   }
82*0b57cec5SDimitry Andric }
83*0b57cec5SDimitry Andric 
84*0b57cec5SDimitry Andric CVSymbolArray
limitSymbolArrayToScope(const CVSymbolArray & Symbols,uint32_t ScopeBegin)85*0b57cec5SDimitry Andric llvm::codeview::limitSymbolArrayToScope(const CVSymbolArray &Symbols,
86*0b57cec5SDimitry Andric                                         uint32_t ScopeBegin) {
87*0b57cec5SDimitry Andric   CVSymbol Opener = *Symbols.at(ScopeBegin);
88*0b57cec5SDimitry Andric   assert(symbolOpensScope(Opener.kind()));
89*0b57cec5SDimitry Andric   uint32_t EndOffset = getScopeEndOffset(Opener);
90*0b57cec5SDimitry Andric   CVSymbol Closer = *Symbols.at(EndOffset);
91*0b57cec5SDimitry Andric   EndOffset += Closer.RecordData.size();
92*0b57cec5SDimitry Andric   return Symbols.substream(ScopeBegin, EndOffset);
93*0b57cec5SDimitry Andric }
94