forked from OSchip/llvm-project
94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
//===- SymbolRecordHelpers.cpp ----------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/CodeView/SymbolRecordHelpers.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
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using namespace llvm;
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using namespace llvm::codeview;
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template <typename RecordT> static RecordT createRecord(const CVSymbol &sym) {
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RecordT record(static_cast<SymbolRecordKind>(sym.kind()));
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cantFail(SymbolDeserializer::deserializeAs<RecordT>(sym, record));
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return record;
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}
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uint32_t llvm::codeview::getScopeEndOffset(const CVSymbol &Sym) {
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assert(symbolOpensScope(Sym.kind()));
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switch (Sym.kind()) {
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case SymbolKind::S_GPROC32:
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case SymbolKind::S_LPROC32:
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case SymbolKind::S_GPROC32_ID:
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case SymbolKind::S_LPROC32_ID:
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case SymbolKind::S_LPROC32_DPC:
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case SymbolKind::S_LPROC32_DPC_ID: {
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ProcSym Proc = createRecord<ProcSym>(Sym);
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return Proc.End;
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}
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case SymbolKind::S_BLOCK32: {
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BlockSym Block = createRecord<BlockSym>(Sym);
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return Block.End;
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}
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case SymbolKind::S_THUNK32: {
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Thunk32Sym Thunk = createRecord<Thunk32Sym>(Sym);
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return Thunk.End;
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}
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case SymbolKind::S_INLINESITE: {
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InlineSiteSym Site = createRecord<InlineSiteSym>(Sym);
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return Site.End;
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}
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default:
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assert(false && "Unknown record type");
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return 0;
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}
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}
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uint32_t
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llvm::codeview::getScopeParentOffset(const llvm::codeview::CVSymbol &Sym) {
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assert(symbolOpensScope(Sym.kind()));
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switch (Sym.kind()) {
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case SymbolKind::S_GPROC32:
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case SymbolKind::S_LPROC32:
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case SymbolKind::S_GPROC32_ID:
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case SymbolKind::S_LPROC32_ID:
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case SymbolKind::S_LPROC32_DPC:
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case SymbolKind::S_LPROC32_DPC_ID: {
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ProcSym Proc = createRecord<ProcSym>(Sym);
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return Proc.Parent;
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}
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case SymbolKind::S_BLOCK32: {
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BlockSym Block = createRecord<BlockSym>(Sym);
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return Block.Parent;
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}
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case SymbolKind::S_THUNK32: {
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Thunk32Sym Thunk = createRecord<Thunk32Sym>(Sym);
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return Thunk.Parent;
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}
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case SymbolKind::S_INLINESITE: {
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InlineSiteSym Site = createRecord<InlineSiteSym>(Sym);
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return Site.Parent;
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}
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default:
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assert(false && "Unknown record type");
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return 0;
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}
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}
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CVSymbolArray
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llvm::codeview::limitSymbolArrayToScope(const CVSymbolArray &Symbols,
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uint32_t ScopeBegin) {
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CVSymbol Opener = *Symbols.at(ScopeBegin);
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assert(symbolOpensScope(Opener.kind()));
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uint32_t EndOffset = getScopeEndOffset(Opener);
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CVSymbol Closer = *Symbols.at(EndOffset);
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EndOffset += Closer.RecordData.size();
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return Symbols.substream(ScopeBegin, EndOffset);
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}
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