UnwindWasm.h

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//===----------------------------------------------------------------------===//
//
// 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_PROCESS_WASM_UNWINDWASM_H
#define LLDB_SOURCE_PLUGINS_PROCESS_WASM_UNWINDWASM_H
 
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Unwind.h"
#include <vector>
 
namespace lldb_private {
namespace wasm {
 
/// UnwindWasm manages stack unwinding for a WebAssembly process.
class UnwindWasm : public lldb_private::Unwind {
public:
  UnwindWasm(lldb_private::Thread &thread) : Unwind(thread) {}
  ~UnwindWasm() override = default;
 
protected:
  void DoClear() override {
    m_frames.clear();
    m_unwind_complete = false;
  }
 
  uint32_t DoGetFrameCount() override;
 
  bool DoGetFrameInfoAtIndex(uint32_t frame_idx, lldb::addr_t &cfa,
                             lldb::addr_t &pc,
                             bool &behaves_like_zeroth_frame) override;
 
  lldb::RegisterContextSP
  DoCreateRegisterContextForFrame(lldb_private::StackFrame *frame) override;
 
private:
  std::vector<lldb::addr_t> m_frames;
  bool m_unwind_complete = false;
 
  UnwindWasm(const UnwindWasm &);
  const UnwindWasm &operator=(const UnwindWasm &) = delete;
};
 
} // namespace wasm
} // namespace lldb_private
 
#endif