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//===-- DWARFAttribute.cpp ------------------------------------------------===//
//
// 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 "DWARFAttribute.h"
#include "DWARFUnit.h"
#include "DWARFDebugInfo.h"
using namespace lldb_private::dwarf;
DWARFAttributes::DWARFAttributes() : m_infos() {}
DWARFAttributes::~DWARFAttributes() = default;
uint32_t DWARFAttributes::FindAttributeIndex(dw_attr_t attr) const {
collection::const_iterator end = m_infos.end();
collection::const_iterator beg = m_infos.begin();
collection::const_iterator pos;
for (pos = beg; pos != end; ++pos) {
if (pos->attr.get_attr() == attr)
return std::distance(beg, pos);
}
return UINT32_MAX;
}
void DWARFAttributes::Append(const DWARFFormValue &form_value,
dw_offset_t attr_die_offset, dw_attr_t attr) {
AttributeValue attr_value = {const_cast<DWARFUnit *>(form_value.GetUnit()),
attr_die_offset,
{attr, form_value.Form(), form_value.Value()}};
m_infos.push_back(attr_value);
}
bool DWARFAttributes::ExtractFormValueAtIndex(
uint32_t i, DWARFFormValue &form_value) const {
const DWARFUnit *cu = CompileUnitAtIndex(i);
form_value.SetUnit(cu);
form_value.SetForm(FormAtIndex(i));
if (form_value.Form() == DW_FORM_implicit_const) {
form_value.SetValue(ValueAtIndex(i));
return true;
}
lldb::offset_t offset = DIEOffsetAtIndex(i);
return form_value.ExtractValue(cu->GetData(), &offset);
}
DWARFDIE
DWARFAttributes::FormValueAsReference(dw_attr_t attr) const {
const uint32_t attr_idx = FindAttributeIndex(attr);
if (attr_idx != UINT32_MAX)
return FormValueAsReferenceAtIndex(attr_idx);
return {};
}
DWARFDIE
DWARFAttributes::FormValueAsReferenceAtIndex(uint32_t i) const {
DWARFFormValue form_value;
if (ExtractFormValueAtIndex(i, form_value))
return form_value.Reference();
return {};
}
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