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DWARFAttribute.cpp
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1//===-- DWARFAttribute.cpp ------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "DWARFAttribute.h"
10#include "DWARFUnit.h"
11#include "DWARFDebugInfo.h"
12
13using namespace lldb_private::dwarf;
14
16
18
20 collection::const_iterator end = m_infos.end();
21 collection::const_iterator beg = m_infos.begin();
22 collection::const_iterator pos;
23 for (pos = beg; pos != end; ++pos) {
24 if (pos->attr.get_attr() == attr)
25 return std::distance(beg, pos);
26 }
27 return UINT32_MAX;
28}
29
31 dw_offset_t attr_die_offset, dw_attr_t attr) {
32 AttributeValue attr_value = {const_cast<DWARFUnit *>(form_value.GetUnit()),
33 attr_die_offset,
34 {attr, form_value.Form(), form_value.Value()}};
35 m_infos.push_back(attr_value);
36}
37
39 uint32_t i, DWARFFormValue &form_value) const {
40 const DWARFUnit *cu = CompileUnitAtIndex(i);
41 form_value.SetUnit(cu);
42 form_value.SetForm(FormAtIndex(i));
43 if (form_value.Form() == DW_FORM_implicit_const) {
44 form_value.SetValue(ValueAtIndex(i));
45 return true;
46 }
48 return form_value.ExtractValue(cu->GetData(), &offset);
49}
50
53 const uint32_t attr_idx = FindAttributeIndex(attr);
54 if (attr_idx != UINT32_MAX)
55 return FormValueAsReferenceAtIndex(attr_idx);
56 return {};
57}
58
61 DWARFFormValue form_value;
62 if (ExtractFormValueAtIndex(i, form_value))
63 return form_value.Reference();
64 return {};
65}
DWARFDIE FormValueAsReferenceAtIndex(uint32_t i) const
DWARFUnit * CompileUnitAtIndex(uint32_t i) const
dw_form_t FormAtIndex(uint32_t i) const
dw_offset_t DIEOffsetAtIndex(uint32_t i) const
DWARFDIE FormValueAsReference(dw_attr_t attr) const
bool ExtractFormValueAtIndex(uint32_t i, DWARFFormValue &form_value) const
uint32_t FindAttributeIndex(dw_attr_t attr) const
collection m_infos
DWARFFormValue::ValueType ValueAtIndex(uint32_t i) const
void Append(const DWARFFormValue &form_value, dw_offset_t attr_die_offset, dw_attr_t attr)
DWARFDIE Reference() const
dw_form_t Form() const
void SetForm(dw_form_t form)
const DWARFUnit * GetUnit() const
void SetUnit(const DWARFUnit *unit)
void SetValue(const ValueType &val)
const ValueType & Value() const
bool ExtractValue(const lldb_private::DWARFDataExtractor &data, lldb::offset_t *offset_ptr)
const lldb_private::DWARFDataExtractor & GetData() const
Get the data that contains the DIE information for this unit.
Definition: DWARFUnit.cpp:1002
uint64_t dw_offset_t
Definition: dwarf.h:31
llvm::dwarf::Attribute dw_attr_t
Definition: dwarf.h:24
#define UINT32_MAX
Definition: lldb-defines.h:19
uint64_t offset_t
Definition: lldb-types.h:83