source/Plugins/Process/Utility/UnwindMacOSXFrameBackchain.h

   1 //===-- UnwindMacOSXFrameBackchain.h ----------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef lldb_UnwindMacOSXFrameBackchain_h_
  11 #define lldb_UnwindMacOSXFrameBackchain_h_
  12
  13 #include <vector>
  14
  15 #include "lldb/Target/Unwind.h"
  16 #include "lldb/lldb-private.h"
  17
  18 class UnwindMacOSXFrameBackchain : public lldb_private::Unwind {
  19 public:
  20   UnwindMacOSXFrameBackchain(lldb_private::Thread &thread);
  21
  22   ~UnwindMacOSXFrameBackchain() override = default;
  23
  24 protected:
  25   void DoClear() override { m_cursors.clear(); }
  26
  27   uint32_t DoGetFrameCount() override;
  28
  29   bool DoGetFrameInfoAtIndex(uint32_t frame_idx, lldb::addr_t &cfa,
  30                              lldb::addr_t &pc) override;
  31
  32   lldb::RegisterContextSP
  33   DoCreateRegisterContextForFrame(lldb_private::StackFrame *frame) override;
  34
  35   friend class RegisterContextMacOSXFrameBackchain;
  36
  37   struct Cursor {
  38     lldb::addr_t pc; // Program counter
  39     lldb::addr_t fp; // Frame pointer for us with backchain
  40   };
  41
  42 private:
  43   std::vector<Cursor> m_cursors;
  44
  45   size_t GetStackFrameData_i386(const lldb_private::ExecutionContext &exe_ctx);
  46
  47   size_t
  48   GetStackFrameData_x86_64(const lldb_private::ExecutionContext &exe_ctx);
  49
  50   //------------------------------------------------------------------
  51   // For UnwindMacOSXFrameBackchain only
  52   //------------------------------------------------------------------
  53   DISALLOW_COPY_AND_ASSIGN(UnwindMacOSXFrameBackchain);
  54 };
  55
  56 #endif // lldb_UnwindMacOSXFrameBackchain_h_