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 // C Includes
  14 // C++ Includes
  15 #include <vector>
  16
  17 // Other libraries and framework includes
  18 // Project includes
  19 #include "lldb/Target/Unwind.h"
  20 #include "lldb/lldb-private.h"
  21
  22 class UnwindMacOSXFrameBackchain : public lldb_private::Unwind {
  23 public:
  24   UnwindMacOSXFrameBackchain(lldb_private::Thread &thread);
  25
  26   ~UnwindMacOSXFrameBackchain() override = default;
  27
  28 protected:
  29   void DoClear() override { m_cursors.clear(); }
  30
  31   uint32_t DoGetFrameCount() override;
  32
  33   bool DoGetFrameInfoAtIndex(uint32_t frame_idx, lldb::addr_t &cfa,
  34                              lldb::addr_t &pc) override;
  35
  36   lldb::RegisterContextSP
  37   DoCreateRegisterContextForFrame(lldb_private::StackFrame *frame) override;
  38
  39   friend class RegisterContextMacOSXFrameBackchain;
  40
  41   struct Cursor {
  42     lldb::addr_t pc; // Program counter
  43     lldb::addr_t fp; // Frame pointer for us with backchain
  44   };
  45
  46 private:
  47   std::vector<Cursor> m_cursors;
  48
  49   size_t GetStackFrameData_i386(const lldb_private::ExecutionContext &exe_ctx);
  50
  51   size_t
  52   GetStackFrameData_x86_64(const lldb_private::ExecutionContext &exe_ctx);
  53
  54   //------------------------------------------------------------------
  55   // For UnwindMacOSXFrameBackchain only
  56   //------------------------------------------------------------------
  57   DISALLOW_COPY_AND_ASSIGN(UnwindMacOSXFrameBackchain);
  58 };
  59
  60 #endif // lldb_UnwindMacOSXFrameBackchain_h_