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 // C++ Includes
14 
15 // Other libraries and framework includes
16 
17 #include "lldb/Core/ArchSpec.h"
18 #include "lldb/Target/MemoryRegionInfo.h"
19 #include "lldb/Utility/FileSpec.h"
20 
21 #include "NativeThreadNetBSD.h"
22 #include "lldb/Host/common/NativeProcessProtocol.h"
23 
24 namespace lldb_private {
25 namespace process_netbsd {
26 /// @class NativeProcessNetBSD
27 /// @brief Manages communication with the inferior (debugee) process.
28 ///
29 /// Upon construction, this class prepares and launches an inferior process for
30 /// debugging.
31 ///
32 /// Changes in the inferior process state are broadcasted.
33 class NativeProcessNetBSD : public NativeProcessProtocol {
34   friend Status NativeProcessProtocol::Launch(
35       ProcessLaunchInfo &launch_info, NativeDelegate &native_delegate,
36       MainLoop &mainloop, NativeProcessProtocolSP &process_sp);
37 
38   friend Status NativeProcessProtocol::Attach(
39       lldb::pid_t pid, NativeProcessProtocol::NativeDelegate &native_delegate,
40       MainLoop &mainloop, NativeProcessProtocolSP &process_sp);
41 
42 public:
43   // ---------------------------------------------------------------------
44   // NativeProcessProtocol Interface
45   // ---------------------------------------------------------------------
46   Status Resume(const ResumeActionList &resume_actions) override;
47 
48   Status Halt() override;
49 
50   Status Detach() override;
51 
52   Status Signal(int signo) override;
53 
54   Status Kill() override;
55 
56   Status GetMemoryRegionInfo(lldb::addr_t load_addr,
57                              MemoryRegionInfo &range_info) override;
58 
59   Status ReadMemory(lldb::addr_t addr, void *buf, size_t size,
60                     size_t &bytes_read) override;
61 
62   Status ReadMemoryWithoutTrap(lldb::addr_t addr, void *buf, size_t size,
63                                size_t &bytes_read) override;
64 
65   Status WriteMemory(lldb::addr_t addr, const void *buf, size_t size,
66                      size_t &bytes_written) override;
67 
68   Status AllocateMemory(size_t size, uint32_t permissions,
69                         lldb::addr_t &addr) override;
70 
71   Status DeallocateMemory(lldb::addr_t addr) override;
72 
73   lldb::addr_t GetSharedLibraryInfoAddress() override;
74 
75   size_t UpdateThreads() override;
76 
77   bool GetArchitecture(ArchSpec &arch) const override;
78 
79   Status SetBreakpoint(lldb::addr_t addr, uint32_t size,
80                        bool hardware) override;
81 
82   Status GetLoadedModuleFileSpec(const char *module_path,
83                                  FileSpec &file_spec) override;
84 
85   Status GetFileLoadAddress(const llvm::StringRef &file_name,
86                             lldb::addr_t &load_addr) override;
87 
88   llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
89   GetAuxvData() const override;
90 
91   // ---------------------------------------------------------------------
92   // Interface used by NativeRegisterContext-derived classes.
93   // ---------------------------------------------------------------------
94   static Status PtraceWrapper(int req, lldb::pid_t pid, void *addr = nullptr,
95                               int data = 0, int *result = nullptr);
96 
97 protected:
98   // ---------------------------------------------------------------------
99   // NativeProcessProtocol protected interface
100   // ---------------------------------------------------------------------
101 
102   Status
103   GetSoftwareBreakpointTrapOpcode(size_t trap_opcode_size_hint,
104                                   size_t &actual_opcode_size,
105                                   const uint8_t *&trap_opcode_bytes) override;
106 
107 private:
108   MainLoop::SignalHandleUP m_sigchld_handle;
109   ArchSpec m_arch;
110   LazyBool m_supports_mem_region;
111   std::vector<std::pair<MemoryRegionInfo, FileSpec>> m_mem_region_cache;
112 
113   // ---------------------------------------------------------------------
114   // Private Instance Methods
115   // ---------------------------------------------------------------------
116   NativeProcessNetBSD();
117 
118   bool HasThreadNoLock(lldb::tid_t thread_id);
119 
120   NativeThreadNetBSDSP AddThread(lldb::tid_t thread_id);
121 
122   Status LaunchInferior(MainLoop &mainloop, ProcessLaunchInfo &launch_info);
123   void AttachToInferior(MainLoop &mainloop, lldb::pid_t pid, Status &error);
124 
125   void MonitorCallback(lldb::pid_t pid, int signal);
126   void MonitorExited(lldb::pid_t pid, int signal, int status);
127   void MonitorSIGSTOP(lldb::pid_t pid);
128   void MonitorSIGTRAP(lldb::pid_t pid);
129   void MonitorSignal(lldb::pid_t pid, int signal);
130 
131   Status GetSoftwareBreakpointPCOffset(uint32_t &actual_opcode_size);
132   Status FixupBreakpointPCAsNeeded(NativeThreadNetBSD &thread);
133   Status PopulateMemoryRegionCache();
134   void SigchldHandler();
135 
136   ::pid_t Attach(lldb::pid_t pid, Status &error);
137 
138   Status ReinitializeThreads();
139 };
140 
141 } // namespace process_netbsd
142 } // namespace lldb_private
143 
144 #endif // #ifndef liblldb_NativeProcessNetBSD_H_
145