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//===-- 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%8.8" PRIx64 "\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;
}
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