1 //===-- DWARFAbbreviationDeclaration.cpp ------------------------*- C++ -*-===//
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
12 #include "lldb/Core/dwarf.h"
13 #include "lldb/Utility/Stream.h"
14
15 #include "DWARFFormValue.h"
16
17 using namespace lldb_private;
18
DWARFAbbreviationDeclaration()19 DWARFAbbreviationDeclaration::DWARFAbbreviationDeclaration()
20 : m_code(InvalidCode), m_tag(0), m_has_children(0), m_attributes() {}
21
DWARFAbbreviationDeclaration(dw_tag_t tag,uint8_t has_children)22 DWARFAbbreviationDeclaration::DWARFAbbreviationDeclaration(dw_tag_t tag,
23 uint8_t has_children)
24 : m_code(InvalidCode), m_tag(tag), m_has_children(has_children),
25 m_attributes() {}
26
Extract(const DWARFDataExtractor & data,lldb::offset_t * offset_ptr)27 bool DWARFAbbreviationDeclaration::Extract(const DWARFDataExtractor &data,
28 lldb::offset_t *offset_ptr) {
29 return Extract(data, offset_ptr, data.GetULEB128(offset_ptr));
30 }
31
Extract(const DWARFDataExtractor & data,lldb::offset_t * offset_ptr,dw_uleb128_t code)32 bool DWARFAbbreviationDeclaration::Extract(const DWARFDataExtractor &data,
33 lldb::offset_t *offset_ptr,
34 dw_uleb128_t code) {
35 m_code = code;
36 m_attributes.clear();
37 if (m_code) {
38 m_tag = data.GetULEB128(offset_ptr);
39 m_has_children = data.GetU8(offset_ptr);
40
41 while (data.ValidOffset(*offset_ptr)) {
42 dw_attr_t attr = data.GetULEB128(offset_ptr);
43 dw_form_t form = data.GetULEB128(offset_ptr);
44 DWARFFormValue::ValueType val;
45
46 if (form == DW_FORM_implicit_const)
47 val.value.sval = data.GetULEB128(offset_ptr);
48
49 if (attr && form)
50 m_attributes.push_back(DWARFAttribute(attr, form, val));
51 else
52 break;
53 }
54
55 return m_tag != 0;
56 } else {
57 m_tag = 0;
58 m_has_children = 0;
59 }
60
61 return false;
62 }
63
Dump(Stream * s) const64 void DWARFAbbreviationDeclaration::Dump(Stream *s) const {
65 s->Printf("Debug Abbreviation Declaration: code = 0x%4.4x, tag = %s, "
66 "has_children = %s\n",
67 m_code, DW_TAG_value_to_name(m_tag),
68 DW_CHILDREN_value_to_name(m_has_children));
69
70 DWARFAttribute::const_iterator pos;
71
72 for (pos = m_attributes.begin(); pos != m_attributes.end(); ++pos)
73 s->Printf(" attr = %s, form = %s\n",
74 DW_AT_value_to_name(pos->get_attr()),
75 DW_FORM_value_to_name(pos->get_form()));
76
77 s->Printf("\n");
78 }
79
IsValid()80 bool DWARFAbbreviationDeclaration::IsValid() {
81 return m_code != 0 && m_tag != 0;
82 }
83
84 uint32_t
FindAttributeIndex(dw_attr_t attr) const85 DWARFAbbreviationDeclaration::FindAttributeIndex(dw_attr_t attr) const {
86 uint32_t i;
87 const uint32_t kNumAttributes = m_attributes.size();
88 for (i = 0; i < kNumAttributes; ++i) {
89 if (m_attributes[i].get_attr() == attr)
90 return i;
91 }
92 return DW_INVALID_INDEX;
93 }
94
95 bool DWARFAbbreviationDeclaration::
operator ==(const DWARFAbbreviationDeclaration & rhs) const96 operator==(const DWARFAbbreviationDeclaration &rhs) const {
97 return Tag() == rhs.Tag() && HasChildren() == rhs.HasChildren() &&
98 Attributes() == rhs.Attributes();
99 }
100