| //===-- DWARFAbbreviationDeclaration.cpp ----------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "DWARFAbbreviationDeclaration.h" |
| #include "llvm/Support/Dwarf.h" |
| #include "llvm/Support/Format.h" |
| #include "llvm/Support/raw_ostream.h" |
| using namespace llvm; |
| using namespace dwarf; |
| |
| void DWARFAbbreviationDeclaration::clear() { |
| Code = 0; |
| Tag = 0; |
| HasChildren = false; |
| AttributeSpecs.clear(); |
| } |
| |
| DWARFAbbreviationDeclaration::DWARFAbbreviationDeclaration() { |
| clear(); |
| } |
| |
| bool |
| DWARFAbbreviationDeclaration::extract(DataExtractor Data, uint32_t* OffsetPtr) { |
| clear(); |
| Code = Data.getULEB128(OffsetPtr); |
| if (Code == 0) { |
| return false; |
| } |
| Tag = Data.getULEB128(OffsetPtr); |
| uint8_t ChildrenByte = Data.getU8(OffsetPtr); |
| HasChildren = (ChildrenByte == DW_CHILDREN_yes); |
| |
| while (true) { |
| uint32_t CurOffset = *OffsetPtr; |
| uint16_t Attr = Data.getULEB128(OffsetPtr); |
| if (CurOffset == *OffsetPtr) { |
| clear(); |
| return false; |
| } |
| CurOffset = *OffsetPtr; |
| uint16_t Form = Data.getULEB128(OffsetPtr); |
| if (CurOffset == *OffsetPtr) { |
| clear(); |
| return false; |
| } |
| if (Attr == 0 && Form == 0) |
| break; |
| AttributeSpecs.push_back(AttributeSpec(Attr, Form)); |
| } |
| |
| if (Tag == 0) { |
| clear(); |
| return false; |
| } |
| return true; |
| } |
| |
| void DWARFAbbreviationDeclaration::dump(raw_ostream &OS) const { |
| const char *tagString = TagString(getTag()); |
| OS << '[' << getCode() << "] "; |
| if (tagString) |
| OS << tagString; |
| else |
| OS << format("DW_TAG_Unknown_%x", getTag()); |
| OS << "\tDW_CHILDREN_" << (hasChildren() ? "yes" : "no") << '\n'; |
| for (const AttributeSpec &Spec : AttributeSpecs) { |
| OS << '\t'; |
| const char *attrString = AttributeString(Spec.Attr); |
| if (attrString) |
| OS << attrString; |
| else |
| OS << format("DW_AT_Unknown_%x", Spec.Attr); |
| OS << '\t'; |
| const char *formString = FormEncodingString(Spec.Form); |
| if (formString) |
| OS << formString; |
| else |
| OS << format("DW_FORM_Unknown_%x", Spec.Form); |
| OS << '\n'; |
| } |
| OS << '\n'; |
| } |
| |
| uint32_t |
| DWARFAbbreviationDeclaration::findAttributeIndex(uint16_t attr) const { |
| for (uint32_t i = 0, e = AttributeSpecs.size(); i != e; ++i) { |
| if (AttributeSpecs[i].Attr == attr) |
| return i; |
| } |
| return -1U; |
| } |