| 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 | |
| 14 | using namespace llvm; |
| 15 | using namespace llvm::codeview; |
| 16 | |
| 17 | template <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 | |
| 23 | uint32_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 | |
| 53 | uint32_t |
| 54 | llvm::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 | |
| 84 | CVSymbolArray |
| 85 | llvm::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 |