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| //===-- UnwindTable.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 liblldb_UnwindTable_h
#define liblldb_UnwindTable_h
#include <map>
#include <mutex>
#include "lldb/lldb-private.h"
namespace lldb_private {
// A class which holds all the FuncUnwinders objects for a given ObjectFile.
// The UnwindTable is populated with FuncUnwinders objects lazily during the
// debug session.
class UnwindTable {
public:
/// Create an Unwind table using the data in the given module.
explicit UnwindTable(Module &module);
~UnwindTable();
lldb_private::CallFrameInfo *GetObjectFileUnwindInfo();
lldb_private::DWARFCallFrameInfo *GetEHFrameInfo();
lldb_private::DWARFCallFrameInfo *GetDebugFrameInfo();
lldb_private::CompactUnwindInfo *GetCompactUnwindInfo();
ArmUnwindInfo *GetArmUnwindInfo();
SymbolFile *GetSymbolFile();
lldb::FuncUnwindersSP GetFuncUnwindersContainingAddress(const Address &addr,
SymbolContext &sc);
bool GetAllowAssemblyEmulationUnwindPlans();
// Normally when we create a new FuncUnwinders object we track it in this
// UnwindTable so it can be reused later. But for the target modules show-
// unwind we want to create brand new UnwindPlans for the function of
// interest - so ignore any existing FuncUnwinders for that function and
// don't add this new one to our UnwindTable. This FuncUnwinders object does
// have a reference to the UnwindTable but the lifetime of this uncached
// FuncUnwinders is expected to be short so in practice this will not be a
// problem.
lldb::FuncUnwindersSP
GetUncachedFuncUnwindersContainingAddress(const Address &addr,
SymbolContext &sc);
ArchSpec GetArchitecture();
private:
void Dump(Stream &s);
void Initialize();
llvm::Optional<AddressRange> GetAddressRange(const Address &addr,
SymbolContext &sc);
typedef std::map<lldb::addr_t, lldb::FuncUnwindersSP> collection;
typedef collection::iterator iterator;
typedef collection::const_iterator const_iterator;
Module &m_module;
collection m_unwinds;
bool m_initialized; // delay some initialization until ObjectFile is set up
std::mutex m_mutex;
std::unique_ptr<CallFrameInfo> m_object_file_unwind_up;
std::unique_ptr<DWARFCallFrameInfo> m_eh_frame_up;
std::unique_ptr<DWARFCallFrameInfo> m_debug_frame_up;
std::unique_ptr<CompactUnwindInfo> m_compact_unwind_up;
std::unique_ptr<ArmUnwindInfo> m_arm_unwind_up;
DISALLOW_COPY_AND_ASSIGN(UnwindTable);
};
} // namespace lldb_private
#endif // liblldb_UnwindTable_h
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