| //===--- 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 "DwarfDebug.h" |
| #include "llvm/ADT/Twine.h" |
| #include "llvm/CodeGen/AsmPrinter.h" |
| #include "llvm/IR/DataLayout.h" |
| #include "llvm/MC/MCAsmInfo.h" |
| #include "llvm/MC/MCStreamer.h" |
| #include "llvm/MC/MCSymbol.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" |
| #include "llvm/Support/MD5.h" |
| using namespace llvm; |
| |
| //===----------------------------------------------------------------------===// |
| // DIEAbbrevData Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// Profile - Used to gather unique data for the abbreviation folding set. |
| /// |
| void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const { |
| // Explicitly cast to an integer type for which FoldingSetNodeID has |
| // overloads. Otherwise MSVC 2010 thinks this call is ambiguous. |
| ID.AddInteger(unsigned(Attribute)); |
| ID.AddInteger(unsigned(Form)); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // DIEAbbrev Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// Profile - Used to gather unique data for the abbreviation folding set. |
| /// |
| void DIEAbbrev::Profile(FoldingSetNodeID &ID) const { |
| ID.AddInteger(unsigned(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. |
| AP->EmitULEB128(Tag, dwarf::TagString(Tag)); |
| |
| // Emit whether it has children DIEs. |
| 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. |
| AP->EmitULEB128(AttrData.getAttribute(), |
| dwarf::AttributeString(AttrData.getAttribute())); |
| |
| // Emit form type. |
| 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]; |
| } |
| |
| /// Climb up the parent chain to get the compile unit DIE to which this DIE |
| /// belongs. |
| const DIE *DIE::getCompileUnit() const { |
| const DIE *Cu = getCompileUnitOrNull(); |
| assert(Cu && "We should not have orphaned DIEs."); |
| return Cu; |
| } |
| |
| /// Climb up the parent chain to get the compile unit DIE this DIE belongs |
| /// to. Return NULL if DIE is not added to an owner yet. |
| const DIE *DIE::getCompileUnitOrNull() const { |
| const DIE *p = this; |
| while (p) { |
| if (p->getTag() == dwarf::DW_TAG_compile_unit) |
| return p; |
| p = p->getParent(); |
| } |
| return NULL; |
| } |
| |
| DIEValue *DIE::findAttribute(uint16_t Attribute) { |
| const SmallVectorImpl<DIEValue *> &Values = getValues(); |
| const DIEAbbrev &Abbrevs = getAbbrev(); |
| |
| // Iterate through all the attributes until we find the one we're |
| // looking for, if we can't find it return NULL. |
| for (size_t i = 0; i < Values.size(); ++i) |
| if (Abbrevs.getData()[i].getAttribute() == Attribute) |
| return Values[i]; |
| return NULL; |
| } |
| |
| #ifndef NDEBUG |
| void DIE::print(raw_ostream &O, unsigned IndentCount) const { |
| 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 SmallVectorImpl<DIEAbbrevData> &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, IndentCount+4); |
| } |
| |
| if (!isBlock) O << "\n"; |
| } |
| |
| void DIE::dump() { |
| print(dbgs()); |
| } |
| #endif |
| |
| void DIEValue::anchor() { } |
| |
| #ifndef NDEBUG |
| void DIEValue::dump() const { |
| print(dbgs()); |
| } |
| #endif |
| |
| //===----------------------------------------------------------------------===// |
| // DIEInteger Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// EmitValue - Emit integer of appropriate size. |
| /// |
| void DIEInteger::EmitValue(AsmPrinter *Asm, dwarf::Form Form) const { |
| unsigned Size = ~0U; |
| switch (Form) { |
| case dwarf::DW_FORM_flag_present: |
| // Emit something to keep the lines and comments in sync. |
| // FIXME: Is there a better way to do this? |
| if (Asm->OutStreamer.hasRawTextSupport()) |
| Asm->OutStreamer.EmitRawText(""); |
| return; |
| 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_sec_offset: // Fall thru |
| 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_GNU_str_index: Asm->EmitULEB128(Integer); return; |
| case dwarf::DW_FORM_GNU_addr_index: Asm->EmitULEB128(Integer); return; |
| 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->getDataLayout().getPointerSize(); break; |
| default: llvm_unreachable("DIE Value form not supported yet"); |
| } |
| Asm->OutStreamer.EmitIntValue(Integer, Size); |
| } |
| |
| /// SizeOf - Determine size of integer value in bytes. |
| /// |
| unsigned DIEInteger::SizeOf(AsmPrinter *AP, dwarf::Form Form) const { |
| switch (Form) { |
| case dwarf::DW_FORM_flag_present: return 0; |
| 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_sec_offset: // Fall thru |
| 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_GNU_str_index: return MCAsmInfo::getULEB128Size(Integer); |
| case dwarf::DW_FORM_GNU_addr_index: return MCAsmInfo::getULEB128Size(Integer); |
| 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->getDataLayout().getPointerSize(); |
| default: llvm_unreachable("DIE Value form not supported yet"); |
| } |
| } |
| |
| #ifndef NDEBUG |
| void DIEInteger::print(raw_ostream &O) const { |
| O << "Int: " << (int64_t)Integer << " 0x"; |
| O.write_hex(Integer); |
| } |
| #endif |
| |
| //===----------------------------------------------------------------------===// |
| // DIEExpr Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// EmitValue - Emit expression value. |
| /// |
| void DIEExpr::EmitValue(AsmPrinter *AP, dwarf::Form Form) const { |
| AP->OutStreamer.EmitValue(Expr, SizeOf(AP, Form)); |
| } |
| |
| /// SizeOf - Determine size of expression value in bytes. |
| /// |
| unsigned DIEExpr::SizeOf(AsmPrinter *AP, dwarf::Form Form) const { |
| if (Form == dwarf::DW_FORM_data4) return 4; |
| if (Form == dwarf::DW_FORM_sec_offset) return 4; |
| if (Form == dwarf::DW_FORM_strp) return 4; |
| return AP->getDataLayout().getPointerSize(); |
| } |
| |
| #ifndef NDEBUG |
| void DIEExpr::print(raw_ostream &O) const { |
| O << "Expr: "; |
| Expr->print(O); |
| } |
| #endif |
| |
| //===----------------------------------------------------------------------===// |
| // DIELabel Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// EmitValue - Emit label value. |
| /// |
| void DIELabel::EmitValue(AsmPrinter *AP, dwarf::Form Form) const { |
| AP->EmitLabelReference(Label, SizeOf(AP, Form), |
| Form == dwarf::DW_FORM_strp || |
| Form == dwarf::DW_FORM_sec_offset || |
| Form == dwarf::DW_FORM_ref_addr); |
| } |
| |
| /// SizeOf - Determine size of label value in bytes. |
| /// |
| unsigned DIELabel::SizeOf(AsmPrinter *AP, dwarf::Form Form) const { |
| if (Form == dwarf::DW_FORM_data4) return 4; |
| if (Form == dwarf::DW_FORM_sec_offset) return 4; |
| if (Form == dwarf::DW_FORM_strp) return 4; |
| return AP->getDataLayout().getPointerSize(); |
| } |
| |
| #ifndef NDEBUG |
| void DIELabel::print(raw_ostream &O) const { |
| O << "Lbl: " << Label->getName(); |
| } |
| #endif |
| |
| //===----------------------------------------------------------------------===// |
| // DIEDelta Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// EmitValue - Emit delta value. |
| /// |
| void DIEDelta::EmitValue(AsmPrinter *AP, dwarf::Form Form) const { |
| AP->EmitLabelDifference(LabelHi, LabelLo, SizeOf(AP, Form)); |
| } |
| |
| /// SizeOf - Determine size of delta value in bytes. |
| /// |
| unsigned DIEDelta::SizeOf(AsmPrinter *AP, dwarf::Form Form) const { |
| if (Form == dwarf::DW_FORM_data4) return 4; |
| if (Form == dwarf::DW_FORM_strp) return 4; |
| return AP->getDataLayout().getPointerSize(); |
| } |
| |
| #ifndef NDEBUG |
| void DIEDelta::print(raw_ostream &O) const { |
| O << "Del: " << LabelHi->getName() << "-" << LabelLo->getName(); |
| } |
| #endif |
| |
| //===----------------------------------------------------------------------===// |
| // DIEString Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// EmitValue - Emit string value. |
| /// |
| void DIEString::EmitValue(AsmPrinter *AP, dwarf::Form Form) const { |
| Access->EmitValue(AP, Form); |
| } |
| |
| /// SizeOf - Determine size of delta value in bytes. |
| /// |
| unsigned DIEString::SizeOf(AsmPrinter *AP, dwarf::Form Form) const { |
| return Access->SizeOf(AP, Form); |
| } |
| |
| #ifndef NDEBUG |
| void DIEString::print(raw_ostream &O) const { |
| O << "String: " << Str << "\tSymbol: "; |
| Access->print(O); |
| } |
| #endif |
| |
| //===----------------------------------------------------------------------===// |
| // DIEEntry Implementation |
| //===----------------------------------------------------------------------===// |
| |
| /// EmitValue - Emit debug information entry offset. |
| /// |
| void DIEEntry::EmitValue(AsmPrinter *AP, dwarf::Form Form) const { |
| AP->EmitInt32(Entry->getOffset()); |
| } |
| |
| unsigned DIEEntry::getRefAddrSize(AsmPrinter *AP) { |
| // DWARF4: References that use the attribute form DW_FORM_ref_addr are |
| // specified to be four bytes in the DWARF 32-bit format and eight bytes |
| // in the DWARF 64-bit format, while DWARF Version 2 specifies that such |
| // references have the same size as an address on the target system. |
| if (AP->getDwarfDebug()->getDwarfVersion() == 2) |
| return AP->getDataLayout().getPointerSize(); |
| return sizeof(int32_t); |
| } |
| |
| #ifndef NDEBUG |
| void DIEEntry::print(raw_ostream &O) const { |
| 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 SmallVectorImpl<DIEAbbrevData> &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, dwarf::Form Form) const { |
| switch (Form) { |
| default: llvm_unreachable("Improper form for block"); |
| 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 SmallVectorImpl<DIEAbbrevData> &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, dwarf::Form 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"); |
| } |
| } |
| |
| #ifndef NDEBUG |
| void DIEBlock::print(raw_ostream &O) const { |
| O << "Blk: "; |
| DIE::print(O, 5); |
| } |
| #endif |