forked from OSchip/llvm-project
519 lines
15 KiB
C++
519 lines
15 KiB
C++
//===--- lib/CodeGen/DIE.cpp - DWARF Info Entries -------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Data structures for DWARF info entries.
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//
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//===----------------------------------------------------------------------===//
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#include "DIE.h"
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#include "DwarfPrinter.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Format.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// DIEAbbrevData Implementation
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//===----------------------------------------------------------------------===//
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/// Profile - Used to gather unique data for the abbreviation folding set.
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///
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void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const {
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ID.AddInteger(Attribute);
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ID.AddInteger(Form);
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}
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//===----------------------------------------------------------------------===//
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// DIEAbbrev Implementation
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//===----------------------------------------------------------------------===//
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/// Profile - Used to gather unique data for the abbreviation folding set.
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///
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void DIEAbbrev::Profile(FoldingSetNodeID &ID) const {
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ID.AddInteger(Tag);
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ID.AddInteger(ChildrenFlag);
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// For each attribute description.
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for (unsigned i = 0, N = Data.size(); i < N; ++i)
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Data[i].Profile(ID);
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}
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/// Emit - Print the abbreviation using the specified asm printer.
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///
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void DIEAbbrev::Emit(const AsmPrinter *Asm) const {
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// Emit its Dwarf tag type.
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Asm->EmitULEB128Bytes(Tag);
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Asm->EOL(dwarf::TagString(Tag));
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// Emit whether it has children DIEs.
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Asm->EmitULEB128Bytes(ChildrenFlag);
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Asm->EOL(dwarf::ChildrenString(ChildrenFlag));
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// For each attribute description.
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for (unsigned i = 0, N = Data.size(); i < N; ++i) {
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const DIEAbbrevData &AttrData = Data[i];
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// Emit attribute type.
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Asm->EmitULEB128Bytes(AttrData.getAttribute());
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Asm->EOL(dwarf::AttributeString(AttrData.getAttribute()));
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// Emit form type.
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Asm->EmitULEB128Bytes(AttrData.getForm());
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Asm->EOL(dwarf::FormEncodingString(AttrData.getForm()));
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}
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// Mark end of abbreviation.
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Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(1)");
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Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(2)");
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}
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#ifndef NDEBUG
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void DIEAbbrev::print(raw_ostream &O) {
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O << "Abbreviation @"
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<< format("0x%lx", (long)(intptr_t)this)
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<< " "
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<< dwarf::TagString(Tag)
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<< " "
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<< dwarf::ChildrenString(ChildrenFlag)
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<< '\n';
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for (unsigned i = 0, N = Data.size(); i < N; ++i) {
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O << " "
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<< dwarf::AttributeString(Data[i].getAttribute())
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<< " "
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<< dwarf::FormEncodingString(Data[i].getForm())
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<< '\n';
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}
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}
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void DIEAbbrev::dump() { print(errs()); }
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#endif
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//===----------------------------------------------------------------------===//
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// DIE Implementation
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//===----------------------------------------------------------------------===//
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DIE::~DIE() {
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for (unsigned i = 0, N = Children.size(); i < N; ++i)
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delete Children[i];
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}
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/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
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///
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void DIE::AddSiblingOffset() {
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DIEInteger *DI = new DIEInteger(0);
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Values.insert(Values.begin(), DI);
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Abbrev.AddFirstAttribute(dwarf::DW_AT_sibling, dwarf::DW_FORM_ref4);
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}
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/// Profile - Used to gather unique data for the value folding set.
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///
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void DIE::Profile(FoldingSetNodeID &ID) {
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Abbrev.Profile(ID);
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for (unsigned i = 0, N = Children.size(); i < N; ++i)
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ID.AddPointer(Children[i]);
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for (unsigned j = 0, M = Values.size(); j < M; ++j)
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ID.AddPointer(Values[j]);
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}
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#ifndef NDEBUG
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void DIE::print(raw_ostream &O, unsigned IncIndent) {
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IndentCount += IncIndent;
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const std::string Indent(IndentCount, ' ');
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bool isBlock = Abbrev.getTag() == 0;
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if (!isBlock) {
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O << Indent
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<< "Die: "
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<< format("0x%lx", (long)(intptr_t)this)
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<< ", Offset: " << Offset
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<< ", Size: " << Size
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<< "\n";
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O << Indent
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<< dwarf::TagString(Abbrev.getTag())
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<< " "
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<< dwarf::ChildrenString(Abbrev.getChildrenFlag());
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} else {
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O << "Size: " << Size;
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}
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O << "\n";
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const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData();
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IndentCount += 2;
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for (unsigned i = 0, N = Data.size(); i < N; ++i) {
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O << Indent;
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if (!isBlock)
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O << dwarf::AttributeString(Data[i].getAttribute());
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else
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O << "Blk[" << i << "]";
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O << " "
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<< dwarf::FormEncodingString(Data[i].getForm())
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<< " ";
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Values[i]->print(O);
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O << "\n";
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}
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IndentCount -= 2;
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for (unsigned j = 0, M = Children.size(); j < M; ++j) {
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Children[j]->print(O, 4);
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}
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if (!isBlock) O << "\n";
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IndentCount -= IncIndent;
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}
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void DIE::dump() {
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print(errs());
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}
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#endif
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#ifndef NDEBUG
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void DIEValue::dump() {
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print(errs());
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEInteger Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit integer of appropriate size.
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///
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void DIEInteger::EmitValue(Dwarf *D, unsigned Form) const {
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const AsmPrinter *Asm = D->getAsm();
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switch (Form) {
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case dwarf::DW_FORM_flag: // Fall thru
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case dwarf::DW_FORM_ref1: // Fall thru
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case dwarf::DW_FORM_data1: Asm->EmitInt8(Integer); break;
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case dwarf::DW_FORM_ref2: // Fall thru
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case dwarf::DW_FORM_data2: Asm->EmitInt16(Integer); break;
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case dwarf::DW_FORM_ref4: // Fall thru
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case dwarf::DW_FORM_data4: Asm->EmitInt32(Integer); break;
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case dwarf::DW_FORM_ref8: // Fall thru
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case dwarf::DW_FORM_data8: Asm->EmitInt64(Integer); break;
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case dwarf::DW_FORM_udata: Asm->EmitULEB128Bytes(Integer); break;
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case dwarf::DW_FORM_sdata: Asm->EmitSLEB128Bytes(Integer); break;
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default: llvm_unreachable("DIE Value form not supported yet");
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}
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}
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/// SizeOf - Determine size of integer value in bytes.
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///
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unsigned DIEInteger::SizeOf(const TargetData *TD, unsigned Form) const {
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switch (Form) {
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case dwarf::DW_FORM_flag: // Fall thru
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case dwarf::DW_FORM_ref1: // Fall thru
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case dwarf::DW_FORM_data1: return sizeof(int8_t);
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case dwarf::DW_FORM_ref2: // Fall thru
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case dwarf::DW_FORM_data2: return sizeof(int16_t);
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case dwarf::DW_FORM_ref4: // Fall thru
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case dwarf::DW_FORM_data4: return sizeof(int32_t);
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case dwarf::DW_FORM_ref8: // Fall thru
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case dwarf::DW_FORM_data8: return sizeof(int64_t);
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case dwarf::DW_FORM_udata: return MCAsmInfo::getULEB128Size(Integer);
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case dwarf::DW_FORM_sdata: return MCAsmInfo::getSLEB128Size(Integer);
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default: llvm_unreachable("DIE Value form not supported yet"); break;
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}
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return 0;
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}
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/// Profile - Used to gather unique data for the value folding set.
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///
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void DIEInteger::Profile(FoldingSetNodeID &ID, unsigned Int) {
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ID.AddInteger(isInteger);
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ID.AddInteger(Int);
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}
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void DIEInteger::Profile(FoldingSetNodeID &ID) {
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Profile(ID, Integer);
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}
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#ifndef NDEBUG
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void DIEInteger::print(raw_ostream &O) {
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O << "Int: " << (int64_t)Integer
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<< format(" 0x%llx", (unsigned long long)Integer);
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEString Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit string value.
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///
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void DIEString::EmitValue(Dwarf *D, unsigned Form) const {
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D->getAsm()->EmitString(Str);
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}
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/// Profile - Used to gather unique data for the value folding set.
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///
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void DIEString::Profile(FoldingSetNodeID &ID, const std::string &Str) {
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ID.AddInteger(isString);
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ID.AddString(Str);
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}
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void DIEString::Profile(FoldingSetNodeID &ID) {
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Profile(ID, Str);
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}
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#ifndef NDEBUG
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void DIEString::print(raw_ostream &O) {
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O << "Str: \"" << Str << "\"";
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEDwarfLabel Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit label value.
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///
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void DIEDwarfLabel::EmitValue(Dwarf *D, unsigned Form) const {
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bool IsSmall = Form == dwarf::DW_FORM_data4;
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D->EmitReference(Label, false, IsSmall);
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}
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/// SizeOf - Determine size of label value in bytes.
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///
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unsigned DIEDwarfLabel::SizeOf(const TargetData *TD, unsigned Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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return TD->getPointerSize();
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}
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/// Profile - Used to gather unique data for the value folding set.
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///
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void DIEDwarfLabel::Profile(FoldingSetNodeID &ID, const DWLabel &Label) {
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ID.AddInteger(isLabel);
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Label.Profile(ID);
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}
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void DIEDwarfLabel::Profile(FoldingSetNodeID &ID) {
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Profile(ID, Label);
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}
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#ifndef NDEBUG
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void DIEDwarfLabel::print(raw_ostream &O) {
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O << "Lbl: ";
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Label.print(O);
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEObjectLabel Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit label value.
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///
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void DIEObjectLabel::EmitValue(Dwarf *D, unsigned Form) const {
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bool IsSmall = Form == dwarf::DW_FORM_data4;
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D->EmitReference(Label, false, IsSmall);
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}
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/// SizeOf - Determine size of label value in bytes.
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///
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unsigned DIEObjectLabel::SizeOf(const TargetData *TD, unsigned Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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return TD->getPointerSize();
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}
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/// Profile - Used to gather unique data for the value folding set.
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///
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void DIEObjectLabel::Profile(FoldingSetNodeID &ID, const std::string &Label) {
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ID.AddInteger(isAsIsLabel);
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ID.AddString(Label);
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}
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void DIEObjectLabel::Profile(FoldingSetNodeID &ID) {
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Profile(ID, Label.c_str());
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}
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#ifndef NDEBUG
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void DIEObjectLabel::print(raw_ostream &O) {
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O << "Obj: " << Label;
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIESectionOffset Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit delta value.
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///
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void DIESectionOffset::EmitValue(Dwarf *D, unsigned Form) const {
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bool IsSmall = Form == dwarf::DW_FORM_data4;
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D->EmitSectionOffset(Label.getTag(), Section.getTag(),
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Label.getNumber(), Section.getNumber(),
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IsSmall, IsEH, UseSet);
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}
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/// SizeOf - Determine size of delta value in bytes.
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///
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unsigned DIESectionOffset::SizeOf(const TargetData *TD, unsigned Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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return TD->getPointerSize();
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}
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/// Profile - Used to gather unique data for the value folding set.
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///
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void DIESectionOffset::Profile(FoldingSetNodeID &ID, const DWLabel &Label,
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const DWLabel &Section) {
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ID.AddInteger(isSectionOffset);
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Label.Profile(ID);
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Section.Profile(ID);
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// IsEH and UseSet are specific to the Label/Section that we will emit the
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// offset for; so Label/Section are enough for uniqueness.
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}
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void DIESectionOffset::Profile(FoldingSetNodeID &ID) {
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Profile(ID, Label, Section);
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}
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#ifndef NDEBUG
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void DIESectionOffset::print(raw_ostream &O) {
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O << "Off: ";
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Label.print(O);
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O << "-";
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Section.print(O);
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O << "-" << IsEH << "-" << UseSet;
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEDelta Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit delta value.
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///
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void DIEDelta::EmitValue(Dwarf *D, unsigned Form) const {
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bool IsSmall = Form == dwarf::DW_FORM_data4;
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D->EmitDifference(LabelHi, LabelLo, IsSmall);
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}
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/// SizeOf - Determine size of delta value in bytes.
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///
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unsigned DIEDelta::SizeOf(const TargetData *TD, unsigned Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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return TD->getPointerSize();
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}
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/// Profile - Used to gather unique data for the value folding set.
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///
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void DIEDelta::Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi,
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const DWLabel &LabelLo) {
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ID.AddInteger(isDelta);
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LabelHi.Profile(ID);
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LabelLo.Profile(ID);
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}
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void DIEDelta::Profile(FoldingSetNodeID &ID) {
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Profile(ID, LabelHi, LabelLo);
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}
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#ifndef NDEBUG
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void DIEDelta::print(raw_ostream &O) {
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O << "Del: ";
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LabelHi.print(O);
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O << "-";
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LabelLo.print(O);
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEEntry Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit debug information entry offset.
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///
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void DIEEntry::EmitValue(Dwarf *D, unsigned Form) const {
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D->getAsm()->EmitInt32(Entry->getOffset());
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}
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/// Profile - Used to gather unique data for the value folding set.
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///
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void DIEEntry::Profile(FoldingSetNodeID &ID, DIE *Entry) {
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ID.AddInteger(isEntry);
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ID.AddPointer(Entry);
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}
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void DIEEntry::Profile(FoldingSetNodeID &ID) {
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ID.AddInteger(isEntry);
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if (Entry)
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ID.AddPointer(Entry);
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else
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ID.AddPointer(this);
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}
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#ifndef NDEBUG
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void DIEEntry::print(raw_ostream &O) {
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O << format("Die: 0x%lx", (long)(intptr_t)Entry);
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEBlock Implementation
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//===----------------------------------------------------------------------===//
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/// ComputeSize - calculate the size of the block.
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///
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unsigned DIEBlock::ComputeSize(const TargetData *TD) {
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if (!Size) {
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const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
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for (unsigned i = 0, N = Values.size(); i < N; ++i)
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Size += Values[i]->SizeOf(TD, AbbrevData[i].getForm());
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}
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return Size;
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}
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/// EmitValue - Emit block data.
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///
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void DIEBlock::EmitValue(Dwarf *D, unsigned Form) const {
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const AsmPrinter *Asm = D->getAsm();
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switch (Form) {
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case dwarf::DW_FORM_block1: Asm->EmitInt8(Size); break;
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case dwarf::DW_FORM_block2: Asm->EmitInt16(Size); break;
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case dwarf::DW_FORM_block4: Asm->EmitInt32(Size); break;
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case dwarf::DW_FORM_block: Asm->EmitULEB128Bytes(Size); break;
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default: llvm_unreachable("Improper form for block"); break;
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}
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const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
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for (unsigned i = 0, N = Values.size(); i < N; ++i) {
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Asm->EOL();
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Values[i]->EmitValue(D, AbbrevData[i].getForm());
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}
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}
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/// SizeOf - Determine size of block data in bytes.
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///
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unsigned DIEBlock::SizeOf(const TargetData *TD, unsigned Form) const {
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switch (Form) {
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case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
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case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
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case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
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case dwarf::DW_FORM_block: return Size + MCAsmInfo::getULEB128Size(Size);
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default: llvm_unreachable("Improper form for block"); break;
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}
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return 0;
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}
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void DIEBlock::Profile(FoldingSetNodeID &ID) {
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ID.AddInteger(isBlock);
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DIE::Profile(ID);
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}
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#ifndef NDEBUG
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void DIEBlock::print(raw_ostream &O) {
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O << "Blk: ";
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DIE::print(O, 5);
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}
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#endif
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