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//===-- DWARFAbbreviationDeclaration.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_DWARFABBREVIATIONDECLARATION_H
#define LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFABBREVIATIONDECLARATION_H
#include "DWARFAttribute.h"
#include "DWARFDefines.h"
#include "SymbolFileDWARF.h"
#include "llvm/Support/Error.h"
class DWARFAbbreviationDeclaration {
public:
enum { InvalidCode = 0 };
DWARFAbbreviationDeclaration();
// For hand crafting an abbreviation declaration
DWARFAbbreviationDeclaration(dw_tag_t tag, uint8_t has_children);
dw_uleb128_t Code() const { return m_code; }
void SetCode(dw_uleb128_t code) { m_code = code; }
dw_tag_t Tag() const { return m_tag; }
bool HasChildren() const { return m_has_children; }
size_t NumAttributes() const { return m_attributes.size(); }
dw_form_t GetFormByIndex(uint32_t idx) const {
return m_attributes.size() > idx ? m_attributes[idx].get_form() : 0;
}
// idx is assumed to be valid when calling GetAttrAndFormByIndex()
void GetAttrAndFormValueByIndex(uint32_t idx, dw_attr_t &attr,
DWARFFormValue &form_value) const {
m_attributes[idx].get(attr, form_value.FormRef(), form_value.ValueRef());
}
dw_form_t GetFormByIndexUnchecked(uint32_t idx) const {
return m_attributes[idx].get_form();
}
uint32_t FindAttributeIndex(dw_attr_t attr) const;
/// Extract one abbreviation declaration and all of its associated attributes.
/// Possible return values:
/// DWARFEnumState::Complete - the extraction completed successfully. This
/// was the last abbrev decl in a sequence, and the user should not call
/// this function again.
/// DWARFEnumState::MoreItems - the extraction completed successfully. The
/// user should call this function again to retrieve the next decl.
/// llvm::Error - A parsing error occurred. The debug info is malformed.
llvm::Expected<lldb_private::DWARFEnumState>
extract(const lldb_private::DWARFDataExtractor &data,
lldb::offset_t *offset_ptr);
bool IsValid();
protected:
dw_uleb128_t m_code = InvalidCode;
dw_tag_t m_tag = llvm::dwarf::DW_TAG_null;
uint8_t m_has_children = 0;
DWARFAttribute::collection m_attributes;
};
#endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFABBREVIATIONDECLARATION_H
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