1 files changed, 99 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.h b/contrib/llvm-project/lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.h
new file mode 100644
index 000000000000..fdd5b3c278a4
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.h
@@ -0,0 +1,99 @@
+//===-- DWARFFormValue.h ----------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFFORMVALUE_H
+#define LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFFORMVALUE_H
+
+#include "DWARFDataExtractor.h"
+#include <cstddef>
+#include <optional>
+
+namespace lldb_private::plugin {
+namespace dwarf {
+class DWARFUnit;
+class SymbolFileDWARF;
+class DWARFDIE;
+
+class DWARFFormValue {
+public:
+  typedef struct ValueTypeTag {
+    ValueTypeTag() : value() { value.uval = 0; }
+
+    union {
+      uint64_t uval;
+      int64_t sval;
+      const char *cstr;
+    } value;
+    const uint8_t *data = nullptr;
+  } ValueType;
+
+  enum {
+    eValueTypeInvalid = 0,
+    eValueTypeUnsigned,
+    eValueTypeSigned,
+    eValueTypeCStr,
+    eValueTypeBlock
+  };
+
+  DWARFFormValue() = default;
+  DWARFFormValue(const DWARFUnit *unit) : m_unit(unit) {}
+  DWARFFormValue(const DWARFUnit *unit, dw_form_t form)
+      : m_unit(unit), m_form(form) {}
+  const DWARFUnit *GetUnit() const { return m_unit; }
+  void SetUnit(const DWARFUnit *unit) { m_unit = unit; }
+  dw_form_t Form() const { return m_form; }
+  dw_form_t &FormRef() { return m_form; }
+  void SetForm(dw_form_t form) { m_form = form; }
+  const ValueType &Value() const { return m_value; }
+  ValueType &ValueRef() { return m_value; }
+  void SetValue(const ValueType &val) { m_value = val; }
+
+  void Dump(Stream &s) const;
+  bool ExtractValue(const DWARFDataExtractor &data, lldb::offset_t *offset_ptr);
+  const uint8_t *BlockData() const;
+  static std::optional<uint8_t> GetFixedSize(dw_form_t form,
+                                             const DWARFUnit *u);
+  std::optional<uint8_t> GetFixedSize() const;
+  DWARFDIE Reference() const;
+
+  /// If this is a reference to another DIE, return the corresponding DWARFUnit
+  /// and DIE offset such that Unit->GetDIE(offset) produces the desired DIE.
+  /// Otherwise, a nullptr and unspecified offset are returned.
+  std::pair<DWARFUnit *, uint64_t> ReferencedUnitAndOffset() const;
+
+  uint64_t Reference(dw_offset_t offset) const;
+  bool Boolean() const { return m_value.value.uval != 0; }
+  uint64_t Unsigned() const { return m_value.value.uval; }
+  void SetUnsigned(uint64_t uval) { m_value.value.uval = uval; }
+  int64_t Signed() const { return m_value.value.sval; }
+  void SetSigned(int64_t sval) { m_value.value.sval = sval; }
+  const char *AsCString() const;
+  dw_addr_t Address() const;
+  bool IsValid() const { return m_form != 0; }
+  bool SkipValue(const DWARFDataExtractor &debug_info_data,
+                 lldb::offset_t *offset_ptr) const;
+  static bool SkipValue(const dw_form_t form,
+                        const DWARFDataExtractor &debug_info_data,
+                        lldb::offset_t *offset_ptr, const DWARFUnit *unit);
+  static bool IsBlockForm(const dw_form_t form);
+  static bool IsDataForm(const dw_form_t form);
+  static int Compare(const DWARFFormValue &a, const DWARFFormValue &b);
+  void Clear();
+  static bool FormIsSupported(dw_form_t form);
+
+protected:
+  // Compile unit where m_value was located.
+  // It may be different from compile unit where m_value refers to.
+  const DWARFUnit *m_unit = nullptr; // Unit for this form
+  dw_form_t m_form = dw_form_t(0);   // Form for this value
+  ValueType m_value;                 // Contains all data for the form
+};
+} // namespace dwarf
+} // namespace lldb_private::plugin
+
+#endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFFORMVALUE_H