1 //===-- DWARFDebugAbbrev.cpp ----------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "DWARFDebugAbbrev.h"
11 #include "llvm/Support/Format.h"
12 #include "llvm/Support/raw_ostream.h"
15 bool DWARFAbbreviationDeclarationSet::extract(DataExtractor data,
16 uint32_t* offset_ptr) {
17 const uint32_t beginOffset = *offset_ptr;
20 DWARFAbbreviationDeclaration abbrevDeclaration;
21 uint32_t prevAbbrAode = 0;
22 while (abbrevDeclaration.extract(data, offset_ptr)) {
23 Decls.push_back(abbrevDeclaration);
25 IdxOffset = abbrevDeclaration.getCode();
27 if (prevAbbrAode + 1 != abbrevDeclaration.getCode())
28 IdxOffset = UINT32_MAX;// Out of order indexes, we can't do O(1) lookups
30 prevAbbrAode = abbrevDeclaration.getCode();
32 return beginOffset != *offset_ptr;
35 void DWARFAbbreviationDeclarationSet::dump(raw_ostream &OS) const {
36 for (unsigned i = 0, e = Decls.size(); i != e; ++i)
40 const DWARFAbbreviationDeclaration*
41 DWARFAbbreviationDeclarationSet::getAbbreviationDeclaration(uint32_t abbrCode)
43 if (IdxOffset == UINT32_MAX) {
44 DWARFAbbreviationDeclarationCollConstIter pos;
45 DWARFAbbreviationDeclarationCollConstIter end = Decls.end();
46 for (pos = Decls.begin(); pos != end; ++pos) {
47 if (pos->getCode() == abbrCode)
51 uint32_t idx = abbrCode - IdxOffset;
52 if (idx < Decls.size())
58 DWARFDebugAbbrev::DWARFDebugAbbrev() :
60 PrevAbbrOffsetPos(AbbrevCollMap.end()) {}
63 void DWARFDebugAbbrev::parse(DataExtractor data) {
66 while (data.isValidOffset(offset)) {
67 uint32_t initial_cu_offset = offset;
68 DWARFAbbreviationDeclarationSet abbrevDeclSet;
70 if (abbrevDeclSet.extract(data, &offset))
71 AbbrevCollMap[initial_cu_offset] = abbrevDeclSet;
75 PrevAbbrOffsetPos = AbbrevCollMap.end();
78 void DWARFDebugAbbrev::dump(raw_ostream &OS) const {
79 if (AbbrevCollMap.empty()) {
84 DWARFAbbreviationDeclarationCollMapConstIter pos;
85 for (pos = AbbrevCollMap.begin(); pos != AbbrevCollMap.end(); ++pos) {
86 OS << format("Abbrev table for offset: 0x%8.8" PRIx64 "\n", pos->first);
91 const DWARFAbbreviationDeclarationSet*
92 DWARFDebugAbbrev::getAbbreviationDeclarationSet(uint64_t cu_abbr_offset) const {
93 DWARFAbbreviationDeclarationCollMapConstIter end = AbbrevCollMap.end();
94 DWARFAbbreviationDeclarationCollMapConstIter pos;
95 if (PrevAbbrOffsetPos != end &&
96 PrevAbbrOffsetPos->first == cu_abbr_offset) {
97 return &(PrevAbbrOffsetPos->second);
99 pos = AbbrevCollMap.find(cu_abbr_offset);
100 PrevAbbrOffsetPos = pos;
103 if (pos != AbbrevCollMap.end())
104 return &(pos->second);