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Diffstat (limited to 'contrib/llvm/lib/CodeGen/AsmPrinter/DIE.cpp')
| -rw-r--r-- | contrib/llvm/lib/CodeGen/AsmPrinter/DIE.cpp | 367 |
1 files changed, 367 insertions, 0 deletions
diff --git a/contrib/llvm/lib/CodeGen/AsmPrinter/DIE.cpp b/contrib/llvm/lib/CodeGen/AsmPrinter/DIE.cpp new file mode 100644 index 000000000000..673867ada1a2 --- /dev/null +++ b/contrib/llvm/lib/CodeGen/AsmPrinter/DIE.cpp @@ -0,0 +1,367 @@ +//===--- 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/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" +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]; +} + +/// Climb up the parent chain to get the compile unit DIE to which this DIE +/// belongs. +DIE *DIE::getCompileUnit() const { + DIE *p = getParent(); + while (p) { + if (p->getTag() == dwarf::DW_TAG_compile_unit) + return p; + p = p->getParent(); + } + llvm_unreachable("We should not have orphaned DIEs."); +} + +#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() { + 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_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(StringRef("")); + 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, unsigned 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) { + 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)); +} + +/// 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_sec_offset) return 4; + if (Form == dwarf::DW_FORM_strp) return 4; + return AP->getDataLayout().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->getDataLayout().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 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, unsigned 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, 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"); + } +} + +#ifndef NDEBUG +void DIEBlock::print(raw_ostream &O) { + O << "Blk: "; + DIE::print(O, 5); +} +#endif |