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1 //===-- DWARFAbbreviationDeclaration.cpp ----------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "DWARFAbbreviationDeclaration.h"
11 #include "llvm/Support/Dwarf.h"
12 #include "llvm/Support/Format.h"
13 #include "llvm/Support/raw_ostream.h"
14 using namespace llvm;
15 using namespace dwarf;
16
17 bool
18 DWARFAbbreviationDeclaration::extract(DataExtractor data, uint32_t* offset_ptr){
19   return extract(data, offset_ptr, data.getULEB128(offset_ptr));
20 }
21
22 bool
23 DWARFAbbreviationDeclaration::extract(DataExtractor data, uint32_t* offset_ptr,
24                                       uint32_t code) {
25   Code = code;
26   Attribute.clear();
27   if (Code) {
28     Tag = data.getULEB128(offset_ptr);
29     HasChildren = data.getU8(offset_ptr);
30
31     while (data.isValidOffset(*offset_ptr)) {
32       uint16_t attr = data.getULEB128(offset_ptr);
33       uint16_t form = data.getULEB128(offset_ptr);
34
35       if (attr && form)
36         Attribute.push_back(DWARFAttribute(attr, form));
37       else
38         break;
39     }
40
41     return Tag != 0;
42   } else {
43     Tag = 0;
44     HasChildren = false;
45   }
46
47   return false;
48 }
49
50 void DWARFAbbreviationDeclaration::dump(raw_ostream &OS) const {
51   const char *tagString = TagString(getTag());
52   OS << '[' << getCode() << "] ";
53   if (tagString)
54     OS << tagString;
55   else
56     OS << format("DW_TAG_Unknown_%x", getTag());
57   OS << "\tDW_CHILDREN_" << (hasChildren() ? "yes" : "no") << '\n';
58   for (unsigned i = 0, e = Attribute.size(); i != e; ++i) {
59     OS << '\t';
60     const char *attrString = AttributeString(Attribute[i].getAttribute());
61     if (attrString)
62       OS << attrString;
63     else
64       OS << format("DW_AT_Unknown_%x", Attribute[i].getAttribute());
65     OS << '\t';
66     const char *formString = FormEncodingString(Attribute[i].getForm());
67     if (formString)
68       OS << formString;
69     else
70       OS << format("DW_FORM_Unknown_%x", Attribute[i].getForm());
71     OS << '\n';
72   }
73   OS << '\n';
74 }
75
76 uint32_t
77 DWARFAbbreviationDeclaration::findAttributeIndex(uint16_t attr) const {
78   for (uint32_t i = 0, e = Attribute.size(); i != e; ++i) {
79     if (Attribute[i].getAttribute() == attr)
80       return i;
81   }
82   return -1U;
83 }