1 //===-- FreeBSDThread.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_FreeBSDThread_H_
11 #define liblldb_FreeBSDThread_H_
12 
13 #include <memory>
14 #include <string>
15 
16 #include "RegisterContextPOSIX.h"
17 #include "lldb/Target/Thread.h"
18 
19 class ProcessMessage;
20 class ProcessMonitor;
21 class POSIXBreakpointProtocol;
22 
23 //------------------------------------------------------------------------------
24 // @class FreeBSDThread
25 // Abstraction of a FreeBSD thread.
26 class FreeBSDThread : public lldb_private::Thread {
27 public:
28   //------------------------------------------------------------------
29   // Constructors and destructors
30   //------------------------------------------------------------------
31   FreeBSDThread(lldb_private::Process &process, lldb::tid_t tid);
32 
33   virtual ~FreeBSDThread();
34 
35   // POSIXThread
36   void RefreshStateAfterStop() override;
37 
38   // This notifies the thread when a private stop occurs.
39   void DidStop() override;
40 
41   const char *GetInfo() override;
42 
43   void SetName(const char *name) override;
44 
45   const char *GetName() override;
46 
47   lldb::RegisterContextSP GetRegisterContext() override;
48 
49   lldb::RegisterContextSP
50   CreateRegisterContextForFrame(lldb_private::StackFrame *frame) override;
51 
52   lldb::addr_t GetThreadPointer() override;
53 
54   //--------------------------------------------------------------------------
55   // These functions provide a mapping from the register offset
56   // back to the register index or name for use in debugging or log
57   // output.
58 
59   unsigned GetRegisterIndexFromOffset(unsigned offset);
60 
61   const char *GetRegisterName(unsigned reg);
62 
63   const char *GetRegisterNameFromOffset(unsigned offset);
64 
65   //--------------------------------------------------------------------------
66   // These methods form a specialized interface to POSIX threads.
67   //
68   bool Resume();
69 
70   void Notify(const ProcessMessage &message);
71 
72   //--------------------------------------------------------------------------
73   // These methods provide an interface to watchpoints
74   //
75   bool EnableHardwareWatchpoint(lldb_private::Watchpoint *wp);
76 
77   bool DisableHardwareWatchpoint(lldb_private::Watchpoint *wp);
78 
79   uint32_t NumSupportedHardwareWatchpoints();
80 
81   uint32_t FindVacantWatchpointIndex();
82 
83 protected:
GetPOSIXBreakpointProtocol()84   POSIXBreakpointProtocol *GetPOSIXBreakpointProtocol() {
85     if (!m_reg_context_sp)
86       m_reg_context_sp = GetRegisterContext();
87     return m_posix_thread;
88   }
89 
90   std::unique_ptr<lldb_private::StackFrame> m_frame_ap;
91 
92   lldb::BreakpointSiteSP m_breakpoint;
93 
94   bool m_thread_name_valid;
95   std::string m_thread_name;
96   POSIXBreakpointProtocol *m_posix_thread;
97 
98   ProcessMonitor &GetMonitor();
99 
100   bool CalculateStopInfo() override;
101 
102   void BreakNotify(const ProcessMessage &message);
103   void WatchNotify(const ProcessMessage &message);
104   virtual void TraceNotify(const ProcessMessage &message);
105   void LimboNotify(const ProcessMessage &message);
106   void SignalNotify(const ProcessMessage &message);
107   void SignalDeliveredNotify(const ProcessMessage &message);
108   void CrashNotify(const ProcessMessage &message);
109   void ExitNotify(const ProcessMessage &message);
110   void ExecNotify(const ProcessMessage &message);
111 
112   lldb_private::Unwind *GetUnwinder() override;
113 
114   //--------------------------------------------------------------------------
115   // FreeBSDThread internal API.
116 
117   // POSIXThread override
118   virtual void WillResume(lldb::StateType resume_state) override;
119 };
120 
121 #endif // #ifndef liblldb_FreeBSDThread_H_
122