1 files changed, 58 insertions, 0 deletions
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFAttribute.cpp b/lldb/source/Plugins/SymbolFile/DWARF/DWARFAttribute.cpp
new file mode 100644
index 0000000000000..b3594a455680e
--- /dev/null
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFAttribute.cpp
@@ -0,0 +1,58 @@
+//===-- DWARFAttribute.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 "DWARFAttribute.h"
+#include "DWARFUnit.h"
+#include "DWARFDebugInfo.h"
+
+DWARFAttributes::DWARFAttributes() : m_infos() {}
+
+DWARFAttributes::~DWARFAttributes() {}
+
+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 DWARFUnit *cu, dw_offset_t attr_die_offset,
+                             dw_attr_t attr, dw_form_t form) {
+  AttributeValue attr_value = {
+      cu, attr_die_offset, {attr, form, DWARFFormValue::ValueType()}};
+  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));
+  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 {};
+}