144 lines
4.8 KiB
C++
144 lines
4.8 KiB
C++
//===- NativeFunctionSymbol.cpp - info about function symbols----*- 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/PDB/Native/NativeFunctionSymbol.h"
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#include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
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#include "llvm/DebugInfo/PDB/Native/NativeEnumSymbols.h"
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#include "llvm/DebugInfo/PDB/Native/NativeTypeBuiltin.h"
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#include "llvm/DebugInfo/PDB/Native/NativeTypeEnum.h"
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using namespace llvm;
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using namespace llvm::codeview;
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using namespace llvm::pdb;
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NativeFunctionSymbol::NativeFunctionSymbol(NativeSession &Session,
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SymIndexId Id,
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const codeview::ProcSym &Sym,
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uint32_t Offset)
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: NativeRawSymbol(Session, PDB_SymType::Function, Id), Sym(Sym),
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RecordOffset(Offset) {}
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NativeFunctionSymbol::~NativeFunctionSymbol() {}
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void NativeFunctionSymbol::dump(raw_ostream &OS, int Indent,
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PdbSymbolIdField ShowIdFields,
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PdbSymbolIdField RecurseIdFields) const {
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NativeRawSymbol::dump(OS, Indent, ShowIdFields, RecurseIdFields);
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dumpSymbolField(OS, "name", getName(), Indent);
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dumpSymbolField(OS, "length", getLength(), Indent);
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dumpSymbolField(OS, "offset", getAddressOffset(), Indent);
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dumpSymbolField(OS, "section", getAddressSection(), Indent);
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}
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uint32_t NativeFunctionSymbol::getAddressOffset() const {
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return Sym.CodeOffset;
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}
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uint32_t NativeFunctionSymbol::getAddressSection() const { return Sym.Segment; }
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std::string NativeFunctionSymbol::getName() const {
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return std::string(Sym.Name);
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}
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uint64_t NativeFunctionSymbol::getLength() const { return Sym.CodeSize; }
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uint32_t NativeFunctionSymbol::getRelativeVirtualAddress() const {
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return Session.getRVAFromSectOffset(Sym.Segment, Sym.CodeOffset);
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}
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uint64_t NativeFunctionSymbol::getVirtualAddress() const {
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return Session.getVAFromSectOffset(Sym.Segment, Sym.CodeOffset);
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}
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static bool inlineSiteContainsAddress(InlineSiteSym &IS,
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uint32_t OffsetInFunc) {
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// Returns true if inline site contains the offset.
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bool Found = false;
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uint32_t CodeOffset = 0;
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for (auto &Annot : IS.annotations()) {
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switch (Annot.OpCode) {
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case BinaryAnnotationsOpCode::CodeOffset:
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case BinaryAnnotationsOpCode::ChangeCodeOffset:
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case BinaryAnnotationsOpCode::ChangeCodeOffsetAndLineOffset:
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CodeOffset += Annot.U1;
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if (OffsetInFunc >= CodeOffset)
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Found = true;
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break;
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case BinaryAnnotationsOpCode::ChangeCodeLength:
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CodeOffset += Annot.U1;
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if (Found && OffsetInFunc < CodeOffset)
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return true;
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Found = false;
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break;
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case BinaryAnnotationsOpCode::ChangeCodeLengthAndCodeOffset:
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CodeOffset += Annot.U2;
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if (OffsetInFunc >= CodeOffset && OffsetInFunc < CodeOffset + Annot.U1)
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return true;
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Found = false;
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break;
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default:
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break;
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}
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}
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return false;
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}
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std::unique_ptr<IPDBEnumSymbols>
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NativeFunctionSymbol::findInlineFramesByVA(uint64_t VA) const {
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uint16_t Modi;
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if (!Session.moduleIndexForVA(VA, Modi))
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return nullptr;
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Expected<ModuleDebugStreamRef> ModS = Session.getModuleDebugStream(Modi);
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if (!ModS) {
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consumeError(ModS.takeError());
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return nullptr;
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}
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CVSymbolArray Syms = ModS->getSymbolArray();
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// Search for inline sites. There should be one matching top level inline
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// site. Then search in its nested inline sites.
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std::vector<SymIndexId> Frames;
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uint32_t CodeOffset = VA - getVirtualAddress();
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auto Start = Syms.at(RecordOffset);
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auto End = Syms.at(Sym.End);
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while (Start != End) {
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bool Found = false;
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// Find matching inline site within Start and End.
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for (; Start != End; ++Start) {
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if (Start->kind() != S_INLINESITE)
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continue;
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InlineSiteSym IS =
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cantFail(SymbolDeserializer::deserializeAs<InlineSiteSym>(*Start));
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if (inlineSiteContainsAddress(IS, CodeOffset)) {
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// Insert frames in reverse order.
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SymIndexId Id = Session.getSymbolCache().getOrCreateInlineSymbol(
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IS, getVirtualAddress(), Modi, Start.offset());
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Frames.insert(Frames.begin(), Id);
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// Update offsets to search within this inline site.
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++Start;
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End = Syms.at(IS.End);
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Found = true;
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break;
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}
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Start = Syms.at(IS.End);
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if (Start == End)
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break;
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}
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if (!Found)
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break;
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}
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return std::make_unique<NativeEnumSymbols>(Session, std::move(Frames));
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}
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