RegisterContextPOSIX.h revision 327952 
1//===-- RegisterContextPOSIX.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 liblldb_RegisterContextPOSIX_H_
11#define liblldb_RegisterContextPOSIX_H_
12
13// C Includes
14// C++ Includes
15// Other libraries and framework includes
16#include "RegisterInfoInterface.h"
17#include "lldb/Target/RegisterContext.h"
18#include "lldb/Utility/ArchSpec.h"
19
20//------------------------------------------------------------------------------
21/// @class POSIXBreakpointProtocol
22///
23/// @brief Extends RegisterClass with a few virtual operations useful on POSIX.
24class POSIXBreakpointProtocol {
25public:
26  POSIXBreakpointProtocol() { m_watchpoints_initialized = false; }
27  virtual ~POSIXBreakpointProtocol() {}
28
29  /// Updates the register state of the associated thread after hitting a
30  /// breakpoint (if that make sense for the architecture).  Default
31  /// implementation simply returns true for architectures which do not
32  /// require any update.
33  ///
34  /// @return
35  ///    True if the operation succeeded and false otherwise.
36  virtual bool UpdateAfterBreakpoint() = 0;
37
38  /// Determines the index in lldb's register file given a kernel byte offset.
39  virtual unsigned GetRegisterIndexFromOffset(unsigned offset) = 0;
40
41  // Checks to see if a watchpoint specified by hw_index caused the inferior
42  // to stop.
43  virtual bool IsWatchpointHit(uint32_t hw_index) = 0;
44
45  // Resets any watchpoints that have been hit.
46  virtual bool ClearWatchpointHits() = 0;
47
48  // Returns the watchpoint address associated with a watchpoint hardware
49  // index.
50  virtual lldb::addr_t GetWatchpointAddress(uint32_t hw_index) = 0;
51
52  virtual bool IsWatchpointVacant(uint32_t hw_index) = 0;
53
54  virtual bool SetHardwareWatchpointWithIndex(lldb::addr_t addr, size_t size,
55                                              bool read, bool write,
56                                              uint32_t hw_index) = 0;
57
58  // From lldb_private::RegisterContext
59  virtual uint32_t NumSupportedHardwareWatchpoints() = 0;
60
61  // Force m_watchpoints_initialized to TRUE
62  void ForceWatchpointsInitialized() { m_watchpoints_initialized = true; }
63
64protected:
65  bool m_watchpoints_initialized;
66};
67
68#endif // #ifndef liblldb_RegisterContextPOSIX_H_
69