| //===--- 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 "llvm/ADT/Twine.h" |
| #include "llvm/CodeGen/AsmPrinter.h" |
| #include "llvm/MC/MCAsmInfo.h" |
| #include "llvm/MC/MCStreamer.h" |
| #include "llvm/MC/MCSymbol.h" |
| #include "llvm/Target/TargetData.h" |
| #include "llvm/Support/Allocator.h" |
| #include "llvm/Support/Debug.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/Format.h" |
| #include "llvm/Support/FormattedStream.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(AsmPrinter *AP) const { |
| // Emit its Dwarf tag type. |
| // FIXME: Doing work even in non-asm-verbose runs. |
| AP->EmitULEB128(Tag, dwarf::TagString(Tag)); |
| |
| // Emit whether it has children DIEs. |
| // FIXME: Doing work even in non-asm-verbose runs. |
| AP->EmitULEB128(ChildrenFlag, 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. |
| // FIXME: Doing work even in non-asm-verbose runs. |
| AP->EmitULEB128(AttrData.getAttribute(), |
| dwarf::AttributeString(AttrData.getAttribute())); |
| |
| // Emit form type. |
| // FIXME: Doing work even in non-asm-verbose runs. |
| AP->EmitULEB128(AttrData.getForm(), |
| dwarf::FormEncodingString(AttrData.getForm())); |
| } |
| |
| // Mark end of abbreviation. |
| AP->EmitULEB128(0, "EOM(1)"); |
| AP->EmitULEB128(0, "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(dbgs()); } |
| #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. |
| /// |
| DIEValue *DIE::addSiblingOffset(BumpPtrAllocator &A) { |
| DIEInteger *DI = new (A) DIEInteger(0); |
| Values.insert(Values.begin(), DI); |
| Abbrev.AddFirstAttribute(dwarf::DW_AT_sibling, dwarf::DW_FORM_ref4); |
| return DI; |
| } |
| |
| #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()) << "\n"; |
| } else { |
| O << "Size: " << Size << "\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(dbgs()); |
| } |
| #endif |
| |
| void DIEValue::anchor() { } |
| |
| #ifndef NDEBUG |
| void DIEValue::dump() { |
| print(dbgs()); |
| } |
| #endif |
| |
| //===----------------------------------------------------------------------===// |
| // DIEInteger Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// EmitValue - Emit integer of appropriate size. |
| /// |
| void DIEInteger::EmitValue(AsmPrinter *Asm, unsigned Form) const { |
| unsigned Size = ~0U; |
| switch (Form) { |
| case dwarf::DW_FORM_flag: // Fall thru |
| case dwarf::DW_FORM_ref1: // Fall thru |
| case dwarf::DW_FORM_data1: Size = 1; break; |
| case dwarf::DW_FORM_ref2: // Fall thru |
| case dwarf::DW_FORM_data2: Size = 2; break; |
| case dwarf::DW_FORM_ref4: // Fall thru |
| case dwarf::DW_FORM_data4: Size = 4; break; |
| case dwarf::DW_FORM_ref8: // Fall thru |
| case dwarf::DW_FORM_data8: Size = 8; break; |
| case dwarf::DW_FORM_udata: Asm->EmitULEB128(Integer); return; |
| case dwarf::DW_FORM_sdata: Asm->EmitSLEB128(Integer); return; |
| case dwarf::DW_FORM_addr: Size = Asm->getTargetData().getPointerSize(); break; |
| default: llvm_unreachable("DIE Value form not supported yet"); |
| } |
| Asm->OutStreamer.EmitIntValue(Integer, Size, 0/*addrspace*/); |
| } |
| |
| /// SizeOf - Determine size of integer value in bytes. |
| /// |
| unsigned DIEInteger::SizeOf(AsmPrinter *AP, 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); |
| case dwarf::DW_FORM_addr: return AP->getTargetData().getPointerSize(); |
| 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 << " 0x"; |
| O.write_hex(Integer); |
| } |
| #endif |
| |
| //===----------------------------------------------------------------------===// |
| // DIELabel Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// EmitValue - Emit label value. |
| /// |
| void DIELabel::EmitValue(AsmPrinter *AP, unsigned Form) const { |
| AP->OutStreamer.EmitSymbolValue(Label, SizeOf(AP, Form), 0/*AddrSpace*/); |
| } |
| |
| /// SizeOf - Determine size of label value in bytes. |
| /// |
| unsigned DIELabel::SizeOf(AsmPrinter *AP, unsigned Form) const { |
| if (Form == dwarf::DW_FORM_data4) return 4; |
| if (Form == dwarf::DW_FORM_strp) return 4; |
| return AP->getTargetData().getPointerSize(); |
| } |
| |
| #ifndef NDEBUG |
| void DIELabel::print(raw_ostream &O) { |
| O << "Lbl: " << Label->getName(); |
| } |
| #endif |
| |
| //===----------------------------------------------------------------------===// |
| // DIEDelta Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// EmitValue - Emit delta value. |
| /// |
| void DIEDelta::EmitValue(AsmPrinter *AP, unsigned Form) const { |
| AP->EmitLabelDifference(LabelHi, LabelLo, SizeOf(AP, Form)); |
| } |
| |
| /// SizeOf - Determine size of delta value in bytes. |
| /// |
| unsigned DIEDelta::SizeOf(AsmPrinter *AP, unsigned Form) const { |
| if (Form == dwarf::DW_FORM_data4) return 4; |
| if (Form == dwarf::DW_FORM_strp) return 4; |
| return AP->getTargetData().getPointerSize(); |
| } |
| |
| #ifndef NDEBUG |
| void DIEDelta::print(raw_ostream &O) { |
| O << "Del: " << LabelHi->getName() << "-" << LabelLo->getName(); |
| } |
| #endif |
| |
| //===----------------------------------------------------------------------===// |
| // DIEEntry Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// EmitValue - Emit debug information entry offset. |
| /// |
| void DIEEntry::EmitValue(AsmPrinter *AP, unsigned Form) const { |
| AP->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(AsmPrinter *AP) { |
| if (!Size) { |
| const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData(); |
| for (unsigned i = 0, N = Values.size(); i < N; ++i) |
| Size += Values[i]->SizeOf(AP, AbbrevData[i].getForm()); |
| } |
| |
| return Size; |
| } |
| |
| /// EmitValue - Emit block data. |
| /// |
| void DIEBlock::EmitValue(AsmPrinter *Asm, unsigned Form) const { |
| switch (Form) { |
| default: assert(0 && "Improper form for block"); break; |
| 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->EmitULEB128(Size); break; |
| } |
| |
| const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData(); |
| for (unsigned i = 0, N = Values.size(); i < N; ++i) |
| Values[i]->EmitValue(Asm, AbbrevData[i].getForm()); |
| } |
| |
| /// SizeOf - Determine size of block data in bytes. |
| /// |
| unsigned DIEBlock::SizeOf(AsmPrinter *AP, 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 |