lldb/source/Plugins/Process/Utility/HistoryUnwind.h

   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