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