contrib/llvm/tools/lldb/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
  19 // Project includes
  20 #include "lldb/lldb-private.h"
  21 #include "lldb/Target/Unwind.h"
  22
  23 class UnwindMacOSXFrameBackchain : public lldb_private::Unwind
  24 {
  25 public:
  26     UnwindMacOSXFrameBackchain (lldb_private::Thread &thread);
  27
  28     virtual
  29     ~UnwindMacOSXFrameBackchain()
  30     {
  31     }
  32
  33 protected:
  34     virtual void
  35     DoClear()
  36     {
  37         m_cursors.clear();
  38     }
  39
  40     virtual uint32_t
  41     DoGetFrameCount();
  42
  43     bool
  44     DoGetFrameInfoAtIndex (uint32_t frame_idx,
  45                          lldb::addr_t& cfa,
  46                          lldb::addr_t& pc);
  47
  48     lldb::RegisterContextSP
  49     DoCreateRegisterContextForFrame (lldb_private::StackFrame *frame);
  50
  51     friend class RegisterContextMacOSXFrameBackchain;
  52
  53     struct Cursor
  54     {
  55         lldb::addr_t pc;    // Program counter
  56         lldb::addr_t fp;    // Frame pointer for us with backchain
  57     };
  58
  59 private:
  60     std::vector<Cursor> m_cursors;
  61
  62     size_t
  63     GetStackFrameData_i386 (const lldb_private::ExecutionContext &exe_ctx);
  64
  65     size_t
  66     GetStackFrameData_x86_64 (const lldb_private::ExecutionContext &exe_ctx);
  67
  68     //------------------------------------------------------------------
  69     // For UnwindMacOSXFrameBackchain only
  70     //------------------------------------------------------------------
  71     DISALLOW_COPY_AND_ASSIGN (UnwindMacOSXFrameBackchain);
  72 };
  73
  74 #endif  // lldb_UnwindMacOSXFrameBackchain_h_