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//===-- DWARFDeclContext.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_DWARFDECLCONTEXT_H
#define LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFDECLCONTEXT_H
#include "DWARFDefines.h"
#include "lldb/Utility/ConstString.h"
#include "llvm/ADT/StringExtras.h"
#include <cassert>
#include <string>
#include <vector>
namespace lldb_private::plugin {
namespace dwarf {
// DWARFDeclContext
//
// A class that represents a declaration context all the way down to a
// DIE. This is useful when trying to find a DIE in one DWARF to a DIE
// in another DWARF file.
class DWARFDeclContext {
public:
struct Entry {
Entry() = default;
Entry(dw_tag_t t, const char *n) : tag(t), name(n) {}
bool NameMatches(const Entry &rhs) const {
if (name == rhs.name)
return true;
else if (name && rhs.name)
return strcmp(name, rhs.name) == 0;
return false;
}
/// Returns the name of this entry if it has one, or the appropriate
/// "anonymous {namespace, class, struct, union}".
const char *GetName() const;
// Test operator
explicit operator bool() const { return tag != 0; }
dw_tag_t tag = llvm::dwarf::DW_TAG_null;
const char *name = nullptr;
};
DWARFDeclContext() : m_entries() {}
DWARFDeclContext(llvm::ArrayRef<Entry> entries) {
llvm::append_range(m_entries, entries);
}
void AppendDeclContext(dw_tag_t tag, const char *name) {
m_entries.push_back(Entry(tag, name));
}
bool operator==(const DWARFDeclContext &rhs) const;
bool operator!=(const DWARFDeclContext &rhs) const { return !(*this == rhs); }
uint32_t GetSize() const { return m_entries.size(); }
Entry &operator[](uint32_t idx) {
assert(idx < m_entries.size() && "invalid index");
return m_entries[idx];
}
const Entry &operator[](uint32_t idx) const {
assert(idx < m_entries.size() && "invalid index");
return m_entries[idx];
}
const char *GetQualifiedName() const;
// Same as GetQualifiedName, but the life time of the returned string will
// be that of the LLDB session.
ConstString GetQualifiedNameAsConstString() const {
return ConstString(GetQualifiedName());
}
void Clear() {
m_entries.clear();
m_qualified_name.clear();
}
friend llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
const DWARFDeclContext &ctx) {
OS << "DWARFDeclContext{";
llvm::ListSeparator LS;
for (const Entry &e : ctx.m_entries) {
OS << LS << "{" << DW_TAG_value_to_name(e.tag) << ", " << e.GetName()
<< "}";
}
return OS << "}";
}
protected:
typedef std::vector<Entry> collection;
collection m_entries;
mutable std::string m_qualified_name;
};
} // namespace dwarf
} // namespace lldb_private::plugin
#endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFDECLCONTEXT_H
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