1 //===-- NativeProcessNetBSD.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_NativeProcessNetBSD_H_
11 #define liblldb_NativeProcessNetBSD_H_
12 
13 #include "lldb/Target/MemoryRegionInfo.h"
14 #include "lldb/Utility/ArchSpec.h"
15 #include "lldb/Utility/FileSpec.h"
16 
17 #include "NativeThreadNetBSD.h"
18 #include "lldb/Host/common/NativeProcessProtocol.h"
19 
20 namespace lldb_private {
21 namespace process_netbsd {
22 /// @class NativeProcessNetBSD
23 /// @brief Manages communication with the inferior (debugee) process.
24 ///
25 /// Upon construction, this class prepares and launches an inferior process for
26 /// debugging.
27 ///
28 /// Changes in the inferior process state are broadcasted.
29 class NativeProcessNetBSD : public NativeProcessProtocol {
30 public:
31   class Factory : public NativeProcessProtocol::Factory {
32   public:
33     llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
34     Launch(ProcessLaunchInfo &launch_info, NativeDelegate &native_delegate,
35            MainLoop &mainloop) const override;
36 
37     llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
38     Attach(lldb::pid_t pid, NativeDelegate &native_delegate,
39            MainLoop &mainloop) const override;
40   };
41 
42   // ---------------------------------------------------------------------
43   // NativeProcessProtocol Interface
44   // ---------------------------------------------------------------------
45   Status Resume(const ResumeActionList &resume_actions) override;
46 
47   Status Halt() override;
48 
49   Status Detach() override;
50 
51   Status Signal(int signo) override;
52 
53   Status Kill() override;
54 
55   Status GetMemoryRegionInfo(lldb::addr_t load_addr,
56                              MemoryRegionInfo &range_info) override;
57 
58   Status ReadMemory(lldb::addr_t addr, void *buf, size_t size,
59                     size_t &bytes_read) override;
60 
61   Status ReadMemoryWithoutTrap(lldb::addr_t addr, void *buf, size_t size,
62                                size_t &bytes_read) override;
63 
64   Status WriteMemory(lldb::addr_t addr, const void *buf, size_t size,
65                      size_t &bytes_written) override;
66 
67   Status AllocateMemory(size_t size, uint32_t permissions,
68                         lldb::addr_t &addr) override;
69 
70   Status DeallocateMemory(lldb::addr_t addr) override;
71 
72   lldb::addr_t GetSharedLibraryInfoAddress() override;
73 
74   size_t UpdateThreads() override;
75 
76   const ArchSpec &GetArchitecture() const override { return m_arch; }
77 
78   Status SetBreakpoint(lldb::addr_t addr, uint32_t size,
79                        bool hardware) override;
80 
81   Status GetLoadedModuleFileSpec(const char *module_path,
82                                  FileSpec &file_spec) override;
83 
84   Status GetFileLoadAddress(const llvm::StringRef &file_name,
85                             lldb::addr_t &load_addr) override;
86 
87   llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
88   GetAuxvData() const override;
89 
90   // ---------------------------------------------------------------------
91   // Interface used by NativeRegisterContext-derived classes.
92   // ---------------------------------------------------------------------
93   static Status PtraceWrapper(int req, lldb::pid_t pid, void *addr = nullptr,
94                               int data = 0, int *result = nullptr);
95 
96 protected:
97   // ---------------------------------------------------------------------
98   // NativeProcessProtocol protected interface
99   // ---------------------------------------------------------------------
100 
101   Status
102   GetSoftwareBreakpointTrapOpcode(size_t trap_opcode_size_hint,
103                                   size_t &actual_opcode_size,
104                                   const uint8_t *&trap_opcode_bytes) override;
105 
106 private:
107   MainLoop::SignalHandleUP m_sigchld_handle;
108   ArchSpec m_arch;
109   LazyBool m_supports_mem_region = eLazyBoolCalculate;
110   std::vector<std::pair<MemoryRegionInfo, FileSpec>> m_mem_region_cache;
111 
112   // ---------------------------------------------------------------------
113   // Private Instance Methods
114   // ---------------------------------------------------------------------
115   NativeProcessNetBSD(::pid_t pid, int terminal_fd, NativeDelegate &delegate,
116                       const ArchSpec &arch, MainLoop &mainloop);
117 
118   bool HasThreadNoLock(lldb::tid_t thread_id);
119 
120   NativeThreadNetBSD &AddThread(lldb::tid_t thread_id);
121 
122   void MonitorCallback(lldb::pid_t pid, int signal);
123   void MonitorExited(lldb::pid_t pid, WaitStatus status);
124   void MonitorSIGSTOP(lldb::pid_t pid);
125   void MonitorSIGTRAP(lldb::pid_t pid);
126   void MonitorSignal(lldb::pid_t pid, int signal);
127 
128   Status GetSoftwareBreakpointPCOffset(uint32_t &actual_opcode_size);
129   Status FixupBreakpointPCAsNeeded(NativeThreadNetBSD &thread);
130   Status PopulateMemoryRegionCache();
131   void SigchldHandler();
132 
133   Status Attach();
134   Status ReinitializeThreads();
135 };
136 
137 } // namespace process_netbsd
138 } // namespace lldb_private
139 
140 #endif // #ifndef liblldb_NativeProcessNetBSD_H_
141