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 "MachException.h" 22 #include "MachVMMemory.h" 23 #include "MachTask.h" 24 #include "MachThreadList.h" 25 #include "PThreadCondition.h" 26 #include "PThreadEvent.h" 27 #include "PThreadMutex.h" 28 29 #include <mach/mach.h> 30 #include <sys/signal.h> 31 #include <pthread.h> 32 #include <vector> 33 34 class DNBThreadResumeActions; 35 36 class MachProcess 37 { 38 public: 39 //---------------------------------------------------------------------- 40 // Constructors and Destructors 41 //---------------------------------------------------------------------- 42 MachProcess (); 43 ~MachProcess (); 44 45 //---------------------------------------------------------------------- 46 // Child process control 47 //---------------------------------------------------------------------- 48 pid_t AttachForDebug (pid_t pid, char *err_str, size_t err_len); 49 pid_t LaunchForDebug (const char *path, 50 char const *argv[], 51 char const *envp[], 52 const char *working_directory, 53 const char *stdin_path, 54 const char *stdout_path, 55 const char *stderr_path, 56 bool no_stdio, 57 nub_launch_flavor_t launch_flavor, 58 int disable_aslr, 59 DNBError &err); 60 61 static uint32_t GetCPUTypeForLocalProcess (pid_t pid); 62 static pid_t ForkChildForPTraceDebugging (const char *path, char const *argv[], char const *envp[], MachProcess* process, DNBError &err); 63 static pid_t PosixSpawnChildForPTraceDebugging (const char *path, 64 cpu_type_t cpu_type, 65 char const *argv[], 66 char const *envp[], 67 const char *working_directory, 68 const char *stdin_path, 69 const char *stdout_path, 70 const char *stderr_path, 71 bool no_stdio, 72 MachProcess* process, 73 int disable_aslr, 74 DNBError& err); 75 nub_addr_t GetDYLDAllImageInfosAddress (); 76 static const void * PrepareForAttach (const char *path, nub_launch_flavor_t launch_flavor, bool waitfor, DNBError &err_str); 77 static void CleanupAfterAttach (const void *attach_token, bool success, DNBError &err_str); 78 static nub_process_t CheckForProcess (const void *attach_token); 79 #ifdef WITH_SPRINGBOARD 80 pid_t SBLaunchForDebug (const char *app_bundle_path, char const *argv[], char const *envp[], bool no_stdio, DNBError &launch_err); 81 static pid_t SBForkChildForPTraceDebugging (const char *path, char const *argv[], char const *envp[], bool no_stdio, MachProcess* process, DNBError &launch_err); 82 #endif 83 nub_addr_t LookupSymbol (const char *name, const char *shlib); 84 void SetNameToAddressCallback (DNBCallbackNameToAddress callback, void *baton) 85 { 86 m_name_to_addr_callback = callback; 87 m_name_to_addr_baton = baton; 88 } 89 void SetSharedLibraryInfoCallback (DNBCallbackCopyExecutableImageInfos callback, void *baton) 90 { 91 m_image_infos_callback = callback; 92 m_image_infos_baton = baton; 93 } 94 95 bool Resume (const DNBThreadResumeActions& thread_actions); 96 bool Signal (int signal, const struct timespec *timeout_abstime = NULL); 97 bool Kill (const struct timespec *timeout_abstime = NULL); 98 bool Detach (); 99 nub_size_t ReadMemory (nub_addr_t addr, nub_size_t size, void *buf); 100 nub_size_t WriteMemory (nub_addr_t addr, nub_size_t size, const void *buf); 101 102 //---------------------------------------------------------------------- 103 // Path and arg accessors 104 //---------------------------------------------------------------------- 105 const char * Path () const { return m_path.c_str(); } 106 size_t ArgumentCount () const { return m_args.size(); } 107 const char * ArgumentAtIndex (size_t arg_idx) const 108 { 109 if (arg_idx < m_args.size()) 110 return m_args[arg_idx].c_str(); 111 return NULL; 112 } 113 114 //---------------------------------------------------------------------- 115 // Breakpoint functions 116 //---------------------------------------------------------------------- 117 DNBBreakpoint * CreateBreakpoint (nub_addr_t addr, nub_size_t length, bool hardware); 118 bool DisableBreakpoint (nub_addr_t addr, bool remove); 119 void DisableAllBreakpoints (bool remove); 120 bool EnableBreakpoint (nub_addr_t addr); 121 DNBBreakpointList& Breakpoints() { return m_breakpoints; } 122 const DNBBreakpointList& Breakpoints() const { return m_breakpoints; } 123 124 //---------------------------------------------------------------------- 125 // Watchpoint functions 126 //---------------------------------------------------------------------- 127 DNBBreakpoint * CreateWatchpoint (nub_addr_t addr, nub_size_t length, uint32_t watch_type, bool hardware); 128 bool DisableWatchpoint (nub_addr_t addr, bool remove); 129 void DisableAllWatchpoints (bool remove); 130 bool EnableWatchpoint (nub_addr_t addr); 131 uint32_t GetNumSupportedHardwareWatchpoints () const; 132 DNBBreakpointList& Watchpoints() { return m_watchpoints; } 133 const DNBBreakpointList& Watchpoints() const { return m_watchpoints; } 134 135 //---------------------------------------------------------------------- 136 // Exception thread functions 137 //---------------------------------------------------------------------- 138 bool StartSTDIOThread (); 139 static void * STDIOThread (void *arg); 140 void ExceptionMessageReceived (const MachException::Message& exceptionMessage); 141 void ExceptionMessageBundleComplete (); 142 void SharedLibrariesUpdated (); 143 nub_size_t CopyImageInfos (struct DNBExecutableImageInfo **image_infos, bool only_changed); 144 145 //---------------------------------------------------------------------- 146 // Profile functions 147 //---------------------------------------------------------------------- 148 void SetEnableAsyncProfiling (bool enable, uint64_t internal_usec, DNBProfileDataScanType scan_type); 149 bool IsProfilingEnabled () { return m_profile_enabled; } 150 uint64_t ProfileInterval () { return m_profile_interval_usec; } 151 bool StartProfileThread (); 152 static void * ProfileThread (void *arg); 153 void SignalAsyncProfileData (const char *info); 154 size_t GetAsyncProfileData (char *buf, size_t buf_size); 155 156 //---------------------------------------------------------------------- 157 // Accessors 158 //---------------------------------------------------------------------- 159 pid_t ProcessID () const { return m_pid; } 160 bool ProcessIDIsValid () const { return m_pid > 0; } 161 pid_t SetProcessID (pid_t pid); 162 MachTask& Task() { return m_task; } 163 const MachTask& Task() const { return m_task; } 164 165 PThreadEvent& Events() { return m_events; } 166 const DNBRegisterSetInfo * 167 GetRegisterSetInfo (nub_thread_t tid, nub_size_t *num_reg_sets) const; 168 bool GetRegisterValue (nub_thread_t tid, uint32_t set, uint32_t reg, DNBRegisterValue *reg_value) const; 169 bool SetRegisterValue (nub_thread_t tid, uint32_t set, uint32_t reg, const DNBRegisterValue *value) const; 170 nub_bool_t SyncThreadState (nub_thread_t tid); 171 const char * ThreadGetName (nub_thread_t tid); 172 nub_state_t ThreadGetState (nub_thread_t tid); 173 nub_size_t GetNumThreads () const; 174 nub_thread_t GetThreadAtIndex (nub_size_t thread_idx) const; 175 nub_thread_t GetCurrentThread (); 176 nub_thread_t GetCurrentThreadMachPort (); 177 nub_thread_t SetCurrentThread (nub_thread_t tid); 178 MachThreadList & GetThreadList() { return m_thread_list; } 179 bool GetThreadStoppedReason(nub_thread_t tid, struct DNBThreadStopInfo *stop_info); 180 void DumpThreadStoppedReason(nub_thread_t tid) const; 181 const char * GetThreadInfo (nub_thread_t tid) const; 182 183 nub_thread_t GetThreadIDForMachPortNumber (thread_t mach_port_number) const; 184 185 uint32_t GetCPUType (); 186 nub_state_t GetState (); 187 void SetState (nub_state_t state); 188 bool IsRunning (nub_state_t state) 189 { 190 return state == eStateRunning || IsStepping(state); 191 } 192 bool IsStepping (nub_state_t state) 193 { 194 return state == eStateStepping; 195 } 196 bool CanResume (nub_state_t state) 197 { 198 return state == eStateStopped; 199 } 200 201 bool GetExitStatus(int* status) 202 { 203 if (GetState() == eStateExited) 204 { 205 if (status) 206 *status = m_exit_status; 207 return true; 208 } 209 return false; 210 } 211 void SetExitStatus(int status) 212 { 213 m_exit_status = status; 214 SetState(eStateExited); 215 } 216 217 uint32_t StopCount() const { return m_stop_count; } 218 void SetChildFileDescriptors (int stdin_fileno, int stdout_fileno, int stderr_fileno) 219 { 220 m_child_stdin = stdin_fileno; 221 m_child_stdout = stdout_fileno; 222 m_child_stderr = stderr_fileno; 223 } 224 225 int GetStdinFileDescriptor () const { return m_child_stdin; } 226 int GetStdoutFileDescriptor () const { return m_child_stdout; } 227 int GetStderrFileDescriptor () const { return m_child_stderr; } 228 void AppendSTDOUT (char* s, size_t len); 229 size_t GetAvailableSTDOUT (char *buf, size_t buf_size); 230 size_t GetAvailableSTDERR (char *buf, size_t buf_size); 231 void CloseChildFileDescriptors () 232 { 233 if (m_child_stdin >= 0) 234 { 235 ::close (m_child_stdin); 236 m_child_stdin = -1; 237 } 238 if (m_child_stdout >= 0) 239 { 240 ::close (m_child_stdout); 241 m_child_stdout = -1; 242 } 243 if (m_child_stderr >= 0) 244 { 245 ::close (m_child_stderr); 246 m_child_stderr = -1; 247 } 248 } 249 250 bool ProcessUsingSpringBoard() const { return (m_flags & eMachProcessFlagsUsingSBS) != 0; } 251 252 DNBProfileDataScanType GetProfileScanType () { return m_profile_scan_type; } 253 254 private: 255 enum 256 { 257 eMachProcessFlagsNone = 0, 258 eMachProcessFlagsAttached = (1 << 0), 259 eMachProcessFlagsUsingSBS = (1 << 1) 260 }; 261 void Clear (); 262 void ReplyToAllExceptions (); 263 void PrivateResume (); 264 265 uint32_t Flags () const { return m_flags; } 266 nub_state_t DoSIGSTOP (bool clear_bps_and_wps, bool allow_running, uint32_t *thread_idx_ptr); 267 268 pid_t m_pid; // Process ID of child process 269 cpu_type_t m_cpu_type; // The CPU type of this process 270 int m_child_stdin; 271 int m_child_stdout; 272 int m_child_stderr; 273 std::string m_path; // A path to the executable if we have one 274 std::vector<std::string> m_args; // The arguments with which the process was lauched 275 int m_exit_status; // The exit status for the process 276 MachTask m_task; // The mach task for this process 277 uint32_t m_flags; // Process specific flags (see eMachProcessFlags enums) 278 uint32_t m_stop_count; // A count of many times have we stopped 279 pthread_t m_stdio_thread; // Thread ID for the thread that watches for child process stdio 280 PThreadMutex m_stdio_mutex; // Multithreaded protection for stdio 281 std::string m_stdout_data; 282 283 bool m_profile_enabled; // A flag to indicate if profiling is enabled 284 uint64_t m_profile_interval_usec; // If enable, the profiling interval in microseconds 285 DNBProfileDataScanType m_profile_scan_type; // Indicates what needs to be profiled 286 pthread_t m_profile_thread; // Thread ID for the thread that profiles the inferior 287 PThreadMutex m_profile_data_mutex; // Multithreaded protection for profile info data 288 std::vector<std::string> m_profile_data; // Profile data, must be protected by m_profile_data_mutex 289 290 DNBThreadResumeActions m_thread_actions; // The thread actions for the current MachProcess::Resume() call 291 MachException::Message::collection 292 m_exception_messages; // A collection of exception messages caught when listening to the exception port 293 PThreadMutex m_exception_messages_mutex; // Multithreaded protection for m_exception_messages 294 295 MachThreadList m_thread_list; // A list of threads that is maintained/updated after each stop 296 nub_state_t m_state; // The state of our process 297 PThreadMutex m_state_mutex; // Multithreaded protection for m_state 298 PThreadEvent m_events; // Process related events in the child processes lifetime can be waited upon 299 PThreadEvent m_private_events; // Used to coordinate running and stopping the process without affecting m_events 300 DNBBreakpointList m_breakpoints; // Breakpoint list for this process 301 DNBBreakpointList m_watchpoints; // Watchpoint list for this process 302 DNBCallbackNameToAddress m_name_to_addr_callback; 303 void * m_name_to_addr_baton; 304 DNBCallbackCopyExecutableImageInfos 305 m_image_infos_callback; 306 void * m_image_infos_baton; 307 bool m_did_exec; 308 }; 309 310 311 #endif // __MachProcess_h__ 312
