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
extract(DataExtractor data,uint32_t * offset_ptr)18 DWARFAbbreviationDeclaration::extract(DataExtractor data, uint32_t* offset_ptr){
19 return extract(data, offset_ptr, data.getULEB128(offset_ptr));
20 }
21
22 bool
extract(DataExtractor data,uint32_t * offset_ptr,uint32_t code)23 DWARFAbbreviationDeclaration::extract(DataExtractor data, uint32_t* offset_ptr,
24 uint32_t code) {
25 Code = code;
26 Attributes.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 Attributes.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
dump(raw_ostream & OS) const50 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 = Attributes.size(); i != e; ++i) {
59 OS << '\t';
60 const char *attrString = AttributeString(Attributes[i].getAttribute());
61 if (attrString)
62 OS << attrString;
63 else
64 OS << format("DW_AT_Unknown_%x", Attributes[i].getAttribute());
65 OS << '\t';
66 const char *formString = FormEncodingString(Attributes[i].getForm());
67 if (formString)
68 OS << formString;
69 else
70 OS << format("DW_FORM_Unknown_%x", Attributes[i].getForm());
71 OS << '\n';
72 }
73 OS << '\n';
74 }
75
76 uint32_t
findAttributeIndex(uint16_t attr) const77 DWARFAbbreviationDeclaration::findAttributeIndex(uint16_t attr) const {
78 for (uint32_t i = 0, e = Attributes.size(); i != e; ++i) {
79 if (Attributes[i].getAttribute() == attr)
80 return i;
81 }
82 return -1U;
83 }
84