1 //===-- HistoryUnwind.h -----------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_HISTORYUNWIND_H
10 #define LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_HISTORYUNWIND_H
11 
12 #include <vector>
13 
14 #include "lldb/Target/Unwind.h"
15 #include "lldb/lldb-private.h"
16 
17 namespace lldb_private {
18 
19 class HistoryUnwind : public lldb_private::Unwind {
20 public:
21   HistoryUnwind(Thread &thread, std::vector<lldb::addr_t> pcs,
22                 bool pcs_are_call_addresses = false);
23 
24   ~HistoryUnwind() override;
25 
26 protected:
27   void DoClear() override;
28 
29   lldb::RegisterContextSP
30   DoCreateRegisterContextForFrame(StackFrame *frame) override;
31 
32   bool DoGetFrameInfoAtIndex(uint32_t frame_idx, lldb::addr_t &cfa,
33                              lldb::addr_t &pc,
34                              bool &behaves_like_zeroth_frame) override;
35   uint32_t DoGetFrameCount() override;
36 
37 private:
38   std::vector<lldb::addr_t> m_pcs;
39   /// This boolean indicates that the PCs in the non-0 frames are call
40   /// addresses and not return addresses.
41   bool m_pcs_are_call_addresses;
42 };
43 
44 } // namespace lldb_private
45 
46 #endif // LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_HISTORYUNWIND_H
47