1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
//===-- DWARFAbbreviationDeclaration.cpp ------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "DWARFAbbreviationDeclaration.h"
#include "lldb/Core/dwarf.h"
#include "lldb/Utility/Stream.h"
#include "DWARFFormValue.h"
using namespace lldb_private;
DWARFAbbreviationDeclaration::DWARFAbbreviationDeclaration()
: m_code(InvalidCode), m_tag(0), m_has_children(0), m_attributes() {}
DWARFAbbreviationDeclaration::DWARFAbbreviationDeclaration(dw_tag_t tag,
uint8_t has_children)
: m_code(InvalidCode), m_tag(tag), m_has_children(has_children),
m_attributes() {}
bool DWARFAbbreviationDeclaration::Extract(const DWARFDataExtractor &data,
lldb::offset_t *offset_ptr) {
return Extract(data, offset_ptr, data.GetULEB128(offset_ptr));
}
bool DWARFAbbreviationDeclaration::Extract(const DWARFDataExtractor &data,
lldb::offset_t *offset_ptr,
dw_uleb128_t code) {
m_code = code;
m_attributes.clear();
if (m_code) {
m_tag = data.GetULEB128(offset_ptr);
m_has_children = data.GetU8(offset_ptr);
while (data.ValidOffset(*offset_ptr)) {
dw_attr_t attr = data.GetULEB128(offset_ptr);
dw_form_t form = data.GetULEB128(offset_ptr);
DWARFFormValue::ValueType val;
if (form == DW_FORM_implicit_const)
val.value.sval = data.GetULEB128(offset_ptr);
if (attr && form)
m_attributes.push_back(DWARFAttribute(attr, form, val));
else
break;
}
return m_tag != 0;
} else {
m_tag = 0;
m_has_children = 0;
}
return false;
}
void DWARFAbbreviationDeclaration::Dump(Stream *s) const {
s->Printf("Debug Abbreviation Declaration: code = 0x%4.4x, tag = %s, "
"has_children = %s\n",
m_code, DW_TAG_value_to_name(m_tag),
DW_CHILDREN_value_to_name(m_has_children));
DWARFAttribute::const_iterator pos;
for (pos = m_attributes.begin(); pos != m_attributes.end(); ++pos)
s->Printf(" attr = %s, form = %s\n",
DW_AT_value_to_name(pos->get_attr()),
DW_FORM_value_to_name(pos->get_form()));
s->Printf("\n");
}
bool DWARFAbbreviationDeclaration::IsValid() {
return m_code != 0 && m_tag != 0;
}
uint32_t
DWARFAbbreviationDeclaration::FindAttributeIndex(dw_attr_t attr) const {
uint32_t i;
const uint32_t kNumAttributes = m_attributes.size();
for (i = 0; i < kNumAttributes; ++i) {
if (m_attributes[i].get_attr() == attr)
return i;
}
return DW_INVALID_INDEX;
}
bool DWARFAbbreviationDeclaration::
operator==(const DWARFAbbreviationDeclaration &rhs) const {
return Tag() == rhs.Tag() && HasChildren() == rhs.HasChildren() &&
Attributes() == rhs.Attributes();
}
|
