| //===-- DWARFDebugAbbrev.cpp ----------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "DWARFDebugAbbrev.h" |
| #include "llvm/Support/Format.h" |
| #include "llvm/Support/raw_ostream.h" |
| using namespace llvm; |
| |
| bool DWARFAbbreviationDeclarationSet::extract(DataExtractor data, |
| uint32_t* offset_ptr) { |
| const uint32_t beginOffset = *offset_ptr; |
| Offset = beginOffset; |
| clear(); |
| DWARFAbbreviationDeclaration abbrevDeclaration; |
| uint32_t prevAbbrAode = 0; |
| while (abbrevDeclaration.extract(data, offset_ptr)) { |
| Decls.push_back(abbrevDeclaration); |
| if (IdxOffset == 0) { |
| IdxOffset = abbrevDeclaration.getCode(); |
| } else { |
| if (prevAbbrAode + 1 != abbrevDeclaration.getCode()) |
| IdxOffset = UINT32_MAX;// Out of order indexes, we can't do O(1) lookups |
| } |
| prevAbbrAode = abbrevDeclaration.getCode(); |
| } |
| return beginOffset != *offset_ptr; |
| } |
| |
| void DWARFAbbreviationDeclarationSet::dump(raw_ostream &OS) const { |
| for (unsigned i = 0, e = Decls.size(); i != e; ++i) |
| Decls[i].dump(OS); |
| } |
| |
| const DWARFAbbreviationDeclaration* |
| DWARFAbbreviationDeclarationSet::getAbbreviationDeclaration(uint32_t abbrCode) |
| const { |
| if (IdxOffset == UINT32_MAX) { |
| DWARFAbbreviationDeclarationCollConstIter pos; |
| DWARFAbbreviationDeclarationCollConstIter end = Decls.end(); |
| for (pos = Decls.begin(); pos != end; ++pos) { |
| if (pos->getCode() == abbrCode) |
| return &(*pos); |
| } |
| } else { |
| uint32_t idx = abbrCode - IdxOffset; |
| if (idx < Decls.size()) |
| return &Decls[idx]; |
| } |
| return NULL; |
| } |
| |
| DWARFDebugAbbrev::DWARFDebugAbbrev() : |
| AbbrevCollMap(), |
| PrevAbbrOffsetPos(AbbrevCollMap.end()) {} |
| |
| |
| void DWARFDebugAbbrev::parse(DataExtractor data) { |
| uint32_t offset = 0; |
| |
| while (data.isValidOffset(offset)) { |
| uint32_t initial_cu_offset = offset; |
| DWARFAbbreviationDeclarationSet abbrevDeclSet; |
| |
| if (abbrevDeclSet.extract(data, &offset)) |
| AbbrevCollMap[initial_cu_offset] = abbrevDeclSet; |
| else |
| break; |
| } |
| PrevAbbrOffsetPos = AbbrevCollMap.end(); |
| } |
| |
| void DWARFDebugAbbrev::dump(raw_ostream &OS) const { |
| if (AbbrevCollMap.empty()) { |
| OS << "< EMPTY >\n"; |
| return; |
| } |
| |
| DWARFAbbreviationDeclarationCollMapConstIter pos; |
| for (pos = AbbrevCollMap.begin(); pos != AbbrevCollMap.end(); ++pos) { |
| OS << format("Abbrev table for offset: 0x%8.8x\n", pos->first); |
| pos->second.dump(OS); |
| } |
| } |
| |
| const DWARFAbbreviationDeclarationSet* |
| DWARFDebugAbbrev::getAbbreviationDeclarationSet(uint64_t cu_abbr_offset) const { |
| DWARFAbbreviationDeclarationCollMapConstIter end = AbbrevCollMap.end(); |
| DWARFAbbreviationDeclarationCollMapConstIter pos; |
| if (PrevAbbrOffsetPos != end && |
| PrevAbbrOffsetPos->first == cu_abbr_offset) { |
| return &(PrevAbbrOffsetPos->second); |
| } else { |
| pos = AbbrevCollMap.find(cu_abbr_offset); |
| PrevAbbrOffsetPos = pos; |
| } |
| |
| if (pos != AbbrevCollMap.end()) |
| return &(pos->second); |
| return NULL; |
| } |