1 //===-- NativeProcessNetBSD.h --------------------------------- -*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef liblldb_NativeProcessNetBSD_H_
10 #define liblldb_NativeProcessNetBSD_H_
11 
12 #include "Plugins/Process/POSIX/NativeProcessELF.h"
13 #include "lldb/Target/MemoryRegionInfo.h"
14 #include "lldb/Utility/ArchSpec.h"
15 #include "lldb/Utility/FileSpec.h"
16 
17 #include "NativeThreadNetBSD.h"
18 
19 namespace lldb_private {
20 namespace process_netbsd {
21 /// \class NativeProcessNetBSD
22 /// Manages communication with the inferior (debugee) process.
23 ///
24 /// Upon construction, this class prepares and launches an inferior process
25 /// for debugging.
26 ///
27 /// Changes in the inferior process state are broadcasted.
28 class NativeProcessNetBSD : public NativeProcessELF {
29 public:
30   class Factory : public NativeProcessProtocol::Factory {
31   public:
32     llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
33     Launch(ProcessLaunchInfo &launch_info, NativeDelegate &native_delegate,
34            MainLoop &mainloop) const override;
35 
36     llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
37     Attach(lldb::pid_t pid, NativeDelegate &native_delegate,
38            MainLoop &mainloop) const override;
39 
40     Extension GetSupportedExtensions() const override;
41   };
42 
43   // NativeProcessProtocol Interface
44   Status Resume(const ResumeActionList &resume_actions) override;
45 
46   Status Halt() override;
47 
48   Status Detach() override;
49 
50   Status Signal(int signo) override;
51 
52   Status Interrupt() 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 WriteMemory(lldb::addr_t addr, const void *buf, size_t size,
63                      size_t &bytes_written) override;
64 
65   lldb::addr_t GetSharedLibraryInfoAddress() override;
66 
67   size_t UpdateThreads() override;
68 
69   const ArchSpec &GetArchitecture() const override { return m_arch; }
70 
71   Status SetBreakpoint(lldb::addr_t addr, uint32_t size,
72                        bool hardware) override;
73 
74   // The two following methods are probably not necessary and probably
75   // will never be called.  Nevertheless, we implement them right now
76   // to reduce the differences between different platforms and reduce
77   // the risk of the lack of implementation actually breaking something,
78   // at least for the time being.
79   Status GetLoadedModuleFileSpec(const char *module_path,
80                                  FileSpec &file_spec) override;
81   Status GetFileLoadAddress(const llvm::StringRef &file_name,
82                             lldb::addr_t &load_addr) override;
83 
84   llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
85   GetAuxvData() const override;
86 
87   // Interface used by NativeRegisterContext-derived classes.
88   static Status PtraceWrapper(int req, lldb::pid_t pid, void *addr = nullptr,
89                               int data = 0, int *result = nullptr);
90 
91 private:
92   MainLoop::SignalHandleUP m_sigchld_handle;
93   ArchSpec m_arch;
94   MainLoop& m_main_loop;
95   LazyBool m_supports_mem_region = eLazyBoolCalculate;
96   std::vector<std::pair<MemoryRegionInfo, FileSpec>> m_mem_region_cache;
97 
98   // Private Instance Methods
99   NativeProcessNetBSD(::pid_t pid, int terminal_fd, NativeDelegate &delegate,
100                       const ArchSpec &arch, MainLoop &mainloop);
101 
102   bool HasThreadNoLock(lldb::tid_t thread_id);
103 
104   NativeThreadNetBSD &AddThread(lldb::tid_t thread_id);
105   void RemoveThread(lldb::tid_t thread_id);
106 
107   void MonitorCallback(lldb::pid_t pid, int signal);
108   void MonitorExited(lldb::pid_t pid, WaitStatus status);
109   void MonitorSIGSTOP(lldb::pid_t pid);
110   void MonitorSIGTRAP(lldb::pid_t pid);
111   void MonitorSignal(lldb::pid_t pid, int signal);
112   void MonitorClone(::pid_t child_pid, bool is_vfork,
113                     NativeThreadNetBSD &parent_thread);
114 
115   Status PopulateMemoryRegionCache();
116   void SigchldHandler();
117 
118   Status Attach();
119   Status SetupTrace();
120   Status ReinitializeThreads();
121 };
122 
123 } // namespace process_netbsd
124 } // namespace lldb_private
125 
126 #endif // #ifndef liblldb_NativeProcessNetBSD_H_
127