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//===-- UnwindMacOSXFrameBackchain.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_UnwindMacOSXFrameBackchain_h_
#define lldb_UnwindMacOSXFrameBackchain_h_
#include <vector>
#include "lldb/Target/Unwind.h"
#include "lldb/lldb-private.h"
class UnwindMacOSXFrameBackchain : public lldb_private::Unwind {
public:
UnwindMacOSXFrameBackchain(lldb_private::Thread &thread);
~UnwindMacOSXFrameBackchain() override = default;
protected:
void DoClear() override { m_cursors.clear(); }
uint32_t DoGetFrameCount() override;
bool DoGetFrameInfoAtIndex(uint32_t frame_idx, lldb::addr_t &cfa,
lldb::addr_t &pc) override;
lldb::RegisterContextSP
DoCreateRegisterContextForFrame(lldb_private::StackFrame *frame) override;
friend class RegisterContextMacOSXFrameBackchain;
struct Cursor {
lldb::addr_t pc; // Program counter
lldb::addr_t fp; // Frame pointer for us with backchain
};
private:
std::vector<Cursor> m_cursors;
size_t GetStackFrameData_i386(const lldb_private::ExecutionContext &exe_ctx);
size_t
GetStackFrameData_x86_64(const lldb_private::ExecutionContext &exe_ctx);
//------------------------------------------------------------------
// For UnwindMacOSXFrameBackchain only
//------------------------------------------------------------------
DISALLOW_COPY_AND_ASSIGN(UnwindMacOSXFrameBackchain);
};
#endif // lldb_UnwindMacOSXFrameBackchain_h_
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