RegisterContextPOSIX.h revision 296417 
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 "lldb/Core/ArchSpec.h"
17#include "lldb/Target/RegisterContext.h"
18#include "RegisterInfoInterface.h"
19
20//------------------------------------------------------------------------------
21/// @class POSIXBreakpointProtocol
22///
23/// @brief Extends RegisterClass with a few virtual operations useful on POSIX.
24class POSIXBreakpointProtocol
25{
26public:
27    POSIXBreakpointProtocol()
28        { m_watchpoints_initialized = false; }
29    virtual ~POSIXBreakpointProtocol() {}
30
31    /// Updates the register state of the associated thread after hitting a
32    /// breakpoint (if that make sense for the architecture).  Default
33    /// implementation simply returns true for architectures which do not
34    /// require any update.
35    ///
36    /// @return
37    ///    True if the operation succeeded and false otherwise.
38    virtual bool UpdateAfterBreakpoint() = 0;
39
40    /// Determines the index in lldb's register file given a kernel byte offset.
41    virtual unsigned
42    GetRegisterIndexFromOffset(unsigned offset) = 0;
43
44    // Checks to see if a watchpoint specified by hw_index caused the inferior
45    // to stop.
46    virtual bool
47    IsWatchpointHit (uint32_t hw_index) = 0;
48
49    // Resets any watchpoints that have been hit.
50    virtual bool
51    ClearWatchpointHits () = 0;
52
53    // Returns the watchpoint address associated with a watchpoint hardware
54    // index.
55    virtual lldb::addr_t
56    GetWatchpointAddress (uint32_t hw_index) = 0;
57
58    virtual bool
59    IsWatchpointVacant (uint32_t hw_index) = 0;
60
61    virtual bool
62    SetHardwareWatchpointWithIndex (lldb::addr_t addr, size_t size,
63                                    bool read, bool write,
64                                    uint32_t hw_index) = 0;
65
66    // From lldb_private::RegisterContext
67    virtual uint32_t
68    NumSupportedHardwareWatchpoints () = 0;
69
70    // Force m_watchpoints_initialized to TRUE
71    void
72    ForceWatchpointsInitialized () {m_watchpoints_initialized = true;}
73
74protected:
75    bool m_watchpoints_initialized;
76};
77
78#endif // #ifndef liblldb_RegisterContextPOSIX_H_
79
80