1 //===-- MachProcess.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 // Created by Greg Clayton on 6/15/07. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef __MachProcess_h__ 15 #define __MachProcess_h__ 16 17 #include "DNBDefs.h" 18 #include "DNBBreakpoint.h" 19 #include "DNBError.h" 20 #include "DNBThreadResumeActions.h" 21 //#include "MachDYLD.h" 22 #include "MachException.h" 23 #include "MachVMMemory.h" 24 #include "MachTask.h" 25 #include "MachThreadList.h" 26 #include "PThreadCondition.h" 27 #include "PThreadEvent.h" 28 #include "PThreadMutex.h" 29 30 #include <mach/mach.h> 31 #include <sys/signal.h> 32 #include <pthread.h> 33 #include <vector> 34 35 class DNBThreadResumeActions; 36 37 class MachProcess 38 { 39 public: 40 //---------------------------------------------------------------------- 41 // Constructors and Destructors 42 //---------------------------------------------------------------------- 43 MachProcess (); 44 ~MachProcess (); 45 46 //---------------------------------------------------------------------- 47 // Child process control 48 //---------------------------------------------------------------------- 49 pid_t AttachForDebug (pid_t pid, char *err_str, size_t err_len); 50 pid_t LaunchForDebug (const char *path, 51 char const *argv[], 52 char const *envp[], 53 const char *working_directory, 54 const char *stdin_path, 55 const char *stdout_path, 56 const char *stderr_path, 57 bool no_stdio, 58 nub_launch_flavor_t launch_flavor, 59 int disable_aslr, 60 DNBError &err); 61 62 static uint32_t GetCPUTypeForLocalProcess (pid_t pid); 63 static pid_t ForkChildForPTraceDebugging (const char *path, char const *argv[], char const *envp[], MachProcess* process, DNBError &err); 64 static pid_t PosixSpawnChildForPTraceDebugging (const char *path, 65 cpu_type_t cpu_type, 66 char const *argv[], 67 char const *envp[], 68 const char *working_directory, 69 const char *stdin_path, 70 const char *stdout_path, 71 const char *stderr_path, 72 bool no_stdio, 73 MachProcess* process, 74 int disable_aslr, 75 DNBError& err); 76 nub_addr_t GetDYLDAllImageInfosAddress (); 77 static const void * PrepareForAttach (const char *path, nub_launch_flavor_t launch_flavor, bool waitfor, DNBError &err_str); 78 static void CleanupAfterAttach (const void *attach_token, bool success, DNBError &err_str); 79 static nub_process_t CheckForProcess (const void *attach_token); 80 #if defined (__arm__) 81 pid_t SBLaunchForDebug (const char *app_bundle_path, char const *argv[], char const *envp[], bool no_stdio, DNBError &launch_err); 82 static pid_t SBForkChildForPTraceDebugging (const char *path, char const *argv[], char const *envp[], bool no_stdio, MachProcess* process, DNBError &launch_err); 83 #endif 84 nub_addr_t LookupSymbol (const char *name, const char *shlib); 85 void SetNameToAddressCallback (DNBCallbackNameToAddress callback, void *baton) 86 { 87 m_name_to_addr_callback = callback; 88 m_name_to_addr_baton = baton; 89 } 90 void SetSharedLibraryInfoCallback (DNBCallbackCopyExecutableImageInfos callback, void *baton) 91 { 92 m_image_infos_callback = callback; 93 m_image_infos_baton = baton; 94 } 95 96 bool Resume (const DNBThreadResumeActions& thread_actions); 97 bool Signal (int signal, const struct timespec *timeout_abstime = NULL); 98 bool Kill (const struct timespec *timeout_abstime = NULL); 99 bool Detach (); 100 nub_size_t ReadMemory (nub_addr_t addr, nub_size_t size, void *buf); 101 nub_size_t WriteMemory (nub_addr_t addr, nub_size_t size, const void *buf); 102 103 //---------------------------------------------------------------------- 104 // Path and arg accessors 105 //---------------------------------------------------------------------- 106 const char * Path () const { return m_path.c_str(); } 107 size_t ArgumentCount () const { return m_args.size(); } 108 const char * ArgumentAtIndex (size_t arg_idx) const 109 { 110 if (arg_idx < m_args.size()) 111 return m_args[arg_idx].c_str(); 112 return NULL; 113 } 114 115 //---------------------------------------------------------------------- 116 // Breakpoint functions 117 //---------------------------------------------------------------------- 118 nub_break_t CreateBreakpoint (nub_addr_t addr, nub_size_t length, bool hardware, thread_t thread); 119 bool DisableBreakpoint (nub_break_t breakID, bool remove); 120 nub_size_t DisableAllBreakpoints (bool remove); 121 bool EnableBreakpoint (nub_break_t breakID); 122 void DumpBreakpoint(nub_break_t breakID) const; 123 DNBBreakpointList& Breakpoints() { return m_breakpoints; } 124 const DNBBreakpointList& Breakpoints() const { return m_breakpoints; } 125 126 //---------------------------------------------------------------------- 127 // Watchpoint functions 128 //---------------------------------------------------------------------- 129 nub_watch_t CreateWatchpoint (nub_addr_t addr, nub_size_t length, uint32_t watch_type, bool hardware, thread_t thread); 130 bool DisableWatchpoint (nub_watch_t watchID, bool remove); 131 nub_size_t DisableAllWatchpoints (bool remove); 132 bool EnableWatchpoint (nub_watch_t watchID); 133 void DumpWatchpoint(nub_watch_t watchID) const; 134 DNBBreakpointList& Watchpoints() { return m_watchpoints; } 135 const DNBBreakpointList& Watchpoints() const { return m_watchpoints; } 136 137 //---------------------------------------------------------------------- 138 // Exception thread functions 139 //---------------------------------------------------------------------- 140 bool StartSTDIOThread (); 141 static void * STDIOThread (void *arg); 142 void ExceptionMessageReceived (const MachException::Message& exceptionMessage); 143 void ExceptionMessageBundleComplete (); 144 void SharedLibrariesUpdated (); 145 nub_size_t CopyImageInfos (struct DNBExecutableImageInfo **image_infos, bool only_changed); 146 147 //---------------------------------------------------------------------- 148 // Accessors 149 //---------------------------------------------------------------------- 150 pid_t ProcessID () const { return m_pid; } 151 bool ProcessIDIsValid () const { return m_pid > 0; } 152 pid_t SetProcessID (pid_t pid); 153 MachTask& Task() { return m_task; } 154 const MachTask& Task() const { return m_task; } 155 156 PThreadEvent& Events() { return m_events; } 157 const DNBRegisterSetInfo * 158 GetRegisterSetInfo (nub_thread_t tid, nub_size_t *num_reg_sets) const; 159 bool GetRegisterValue (nub_thread_t tid, uint32_t set, uint32_t reg, DNBRegisterValue *reg_value) const; 160 bool SetRegisterValue (nub_thread_t tid, uint32_t set, uint32_t reg, const DNBRegisterValue *value) const; 161 const char * ThreadGetName (nub_thread_t tid); 162 nub_state_t ThreadGetState (nub_thread_t tid); 163 nub_size_t GetNumThreads () const; 164 nub_thread_t GetThreadAtIndex (nub_size_t thread_idx) const; 165 nub_thread_t GetCurrentThread (); 166 nub_thread_t SetCurrentThread (nub_thread_t tid); 167 MachThreadList & GetThreadList() { return m_thread_list; } 168 bool GetThreadStoppedReason(nub_thread_t tid, struct DNBThreadStopInfo *stop_info) const; 169 void DumpThreadStoppedReason(nub_thread_t tid) const; 170 const char * GetThreadInfo (nub_thread_t tid) const; 171 172 uint32_t GetCPUType (); 173 nub_state_t GetState (); 174 void SetState (nub_state_t state); 175 bool IsRunning (nub_state_t state) 176 { 177 return state == eStateRunning || IsStepping(state); 178 } 179 bool IsStepping (nub_state_t state) 180 { 181 return state == eStateStepping; 182 } 183 bool CanResume (nub_state_t state) 184 { 185 return state == eStateStopped; 186 } 187 188 bool GetExitStatus(int* status) 189 { 190 if (GetState() == eStateExited) 191 { 192 if (status) 193 *status = m_exit_status; 194 return true; 195 } 196 return false; 197 } 198 void SetExitStatus(int status) 199 { 200 m_exit_status = status; 201 SetState(eStateExited); 202 } 203 204 uint32_t StopCount() const { return m_stop_count; } 205 void SetChildFileDescriptors (int stdin_fileno, int stdout_fileno, int stderr_fileno) 206 { 207 m_child_stdin = stdin_fileno; 208 m_child_stdout = stdout_fileno; 209 m_child_stderr = stderr_fileno; 210 } 211 212 int GetStdinFileDescriptor () const { return m_child_stdin; } 213 int GetStdoutFileDescriptor () const { return m_child_stdout; } 214 int GetStderrFileDescriptor () const { return m_child_stderr; } 215 void AppendSTDOUT (char* s, size_t len); 216 size_t GetAvailableSTDOUT (char *buf, size_t buf_size); 217 size_t GetAvailableSTDERR (char *buf, size_t buf_size); 218 void CloseChildFileDescriptors () 219 { 220 if (m_child_stdin >= 0) 221 { 222 ::close (m_child_stdin); 223 m_child_stdin = -1; 224 } 225 if (m_child_stdout >= 0) 226 { 227 ::close (m_child_stdout); 228 m_child_stdout = -1; 229 } 230 if (m_child_stderr >= 0) 231 { 232 ::close (m_child_stderr); 233 m_child_stderr = -1; 234 } 235 } 236 237 bool ProcessUsingSpringBoard() const { return (m_flags & eMachProcessFlagsUsingSBS) != 0; } 238 private: 239 enum 240 { 241 eMachProcessFlagsNone = 0, 242 eMachProcessFlagsAttached = (1 << 0), 243 eMachProcessFlagsUsingSBS = (1 << 1) 244 }; 245 void Clear (); 246 void ReplyToAllExceptions (); 247 void PrivateResume (); 248 nub_size_t RemoveTrapsFromBuffer (nub_addr_t addr, nub_size_t size, uint8_t *buf) const; 249 250 uint32_t Flags () const { return m_flags; } 251 nub_state_t DoSIGSTOP (bool clear_bps_and_wps, uint32_t *thread_idx_ptr = NULL); 252 253 pid_t m_pid; // Process ID of child process 254 cpu_type_t m_cpu_type; // The CPU type of this process 255 int m_child_stdin; 256 int m_child_stdout; 257 int m_child_stderr; 258 std::string m_path; // A path to the executable if we have one 259 std::vector<std::string> m_args; // The arguments with which the process was lauched 260 int m_exit_status; // The exit status for the process 261 MachTask m_task; // The mach task for this process 262 uint32_t m_flags; // Process specific flags (see eMachProcessFlags enums) 263 uint32_t m_stop_count; // A count of many times have we stopped 264 pthread_t m_stdio_thread; // Thread ID for the thread that watches for child process stdio 265 PThreadMutex m_stdio_mutex; // Multithreaded protection for stdio 266 std::string m_stdout_data; 267 DNBThreadResumeActions m_thread_actions; // The thread actions for the current MachProcess::Resume() call 268 MachException::Message::collection 269 m_exception_messages; // A collection of exception messages caught when listening to the exception port 270 PThreadMutex m_exception_messages_mutex; // Multithreaded protection for m_exception_messages 271 272 MachThreadList m_thread_list; // A list of threads that is maintained/updated after each stop 273 nub_state_t m_state; // The state of our process 274 PThreadMutex m_state_mutex; // Multithreaded protection for m_state 275 PThreadEvent m_events; // Process related events in the child processes lifetime can be waited upon 276 DNBBreakpointList m_breakpoints; // Breakpoint list for this process 277 DNBBreakpointList m_watchpoints; // Watchpoint list for this process 278 DNBCallbackNameToAddress m_name_to_addr_callback; 279 void * m_name_to_addr_baton; 280 DNBCallbackCopyExecutableImageInfos 281 m_image_infos_callback; 282 void * m_image_infos_baton; 283 }; 284 285 286 #endif // __MachProcess_h__ 287