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 <CoreFoundation/CoreFoundation.h> 18 #include <mach-o/loader.h> 19 #include <mach/mach.h> 20 #include <pthread.h> 21 #include <sys/signal.h> 22 #include <uuid/uuid.h> 23 #include <vector> 24 25 #include "DNBBreakpoint.h" 26 #include "DNBDefs.h" 27 #include "DNBError.h" 28 #include "DNBThreadResumeActions.h" 29 #include "Genealogy.h" 30 #include "JSONGenerator.h" 31 #include "MachException.h" 32 #include "MachTask.h" 33 #include "MachThreadList.h" 34 #include "MachVMMemory.h" 35 #include "PThreadCondition.h" 36 #include "PThreadEvent.h" 37 #include "PThreadMutex.h" 38 #include "ThreadInfo.h" 39 40 class DNBThreadResumeActions; 41 42 class MachProcess { 43 public: 44 //---------------------------------------------------------------------- 45 // Constructors and Destructors 46 //---------------------------------------------------------------------- 47 MachProcess(); 48 ~MachProcess(); 49 50 // A structure that can hold everything debugserver needs to know from 51 // a binary's Mach-O header / load commands. 52 53 struct mach_o_segment { 54 std::string name; 55 uint64_t vmaddr; 56 uint64_t vmsize; 57 uint64_t fileoff; 58 uint64_t filesize; 59 uint64_t maxprot; 60 uint64_t initprot; 61 uint64_t nsects; 62 uint64_t flags; 63 }; 64 65 struct mach_o_information { 66 struct mach_header_64 mach_header; 67 std::vector<struct mach_o_segment> segments; 68 uuid_t uuid; 69 std::string min_version_os_name; 70 std::string min_version_os_version; 71 }; 72 73 struct binary_image_information { 74 std::string filename; 75 uint64_t load_address; 76 uint64_t mod_date; // may not be available - 0 if so 77 struct mach_o_information macho_info; 78 79 binary_image_information() 80 : filename(), load_address(INVALID_NUB_ADDRESS), mod_date(0) {} 81 }; 82 83 //---------------------------------------------------------------------- 84 // Child process control 85 //---------------------------------------------------------------------- 86 pid_t AttachForDebug(pid_t pid, char *err_str, size_t err_len); 87 pid_t LaunchForDebug(const char *path, char const *argv[], char const *envp[], 88 const char *working_directory, const char *stdin_path, 89 const char *stdout_path, const char *stderr_path, 90 bool no_stdio, nub_launch_flavor_t launch_flavor, 91 int disable_aslr, const char *event_data, DNBError &err); 92 93 static uint32_t GetCPUTypeForLocalProcess(pid_t pid); 94 static pid_t ForkChildForPTraceDebugging(const char *path, char const *argv[], 95 char const *envp[], 96 MachProcess *process, DNBError &err); 97 static pid_t PosixSpawnChildForPTraceDebugging( 98 const char *path, cpu_type_t cpu_type, char const *argv[], 99 char const *envp[], const char *working_directory, const char *stdin_path, 100 const char *stdout_path, const char *stderr_path, bool no_stdio, 101 MachProcess *process, int disable_aslr, DNBError &err); 102 nub_addr_t GetDYLDAllImageInfosAddress(); 103 static const void *PrepareForAttach(const char *path, 104 nub_launch_flavor_t launch_flavor, 105 bool waitfor, DNBError &err_str); 106 static void CleanupAfterAttach(const void *attach_token, 107 nub_launch_flavor_t launch_flavor, 108 bool success, DNBError &err_str); 109 static nub_process_t CheckForProcess(const void *attach_token, 110 nub_launch_flavor_t launch_flavor); 111 #if defined(WITH_BKS) || defined(WITH_FBS) 112 pid_t BoardServiceLaunchForDebug(const char *app_bundle_path, 113 char const *argv[], char const *envp[], 114 bool no_stdio, bool disable_aslr, 115 const char *event_data, 116 DNBError &launch_err); 117 pid_t BoardServiceForkChildForPTraceDebugging( 118 const char *path, char const *argv[], char const *envp[], bool no_stdio, 119 bool disable_aslr, const char *event_data, DNBError &launch_err); 120 bool BoardServiceSendEvent(const char *event, DNBError &error); 121 #endif 122 static bool GetOSVersionNumbers(uint64_t *major, uint64_t *minor, 123 uint64_t *patch); 124 #ifdef WITH_BKS 125 static void BKSCleanupAfterAttach(const void *attach_token, 126 DNBError &err_str); 127 #endif // WITH_BKS 128 #ifdef WITH_FBS 129 static void FBSCleanupAfterAttach(const void *attach_token, 130 DNBError &err_str); 131 #endif // WITH_FBS 132 #ifdef WITH_SPRINGBOARD 133 pid_t SBLaunchForDebug(const char *app_bundle_path, char const *argv[], 134 char const *envp[], bool no_stdio, bool disable_aslr, 135 DNBError &launch_err); 136 static pid_t SBForkChildForPTraceDebugging(const char *path, 137 char const *argv[], 138 char const *envp[], bool no_stdio, 139 MachProcess *process, 140 DNBError &launch_err); 141 #endif // WITH_SPRINGBOARD 142 nub_addr_t LookupSymbol(const char *name, const char *shlib); 143 void SetNameToAddressCallback(DNBCallbackNameToAddress callback, 144 void *baton) { 145 m_name_to_addr_callback = callback; 146 m_name_to_addr_baton = baton; 147 } 148 void 149 SetSharedLibraryInfoCallback(DNBCallbackCopyExecutableImageInfos callback, 150 void *baton) { 151 m_image_infos_callback = callback; 152 m_image_infos_baton = baton; 153 } 154 155 bool Resume(const DNBThreadResumeActions &thread_actions); 156 bool Signal(int signal, const struct timespec *timeout_abstime = NULL); 157 bool Interrupt(); 158 bool SendEvent(const char *event, DNBError &send_err); 159 bool Kill(const struct timespec *timeout_abstime = NULL); 160 bool Detach(); 161 nub_size_t ReadMemory(nub_addr_t addr, nub_size_t size, void *buf); 162 nub_size_t WriteMemory(nub_addr_t addr, nub_size_t size, const void *buf); 163 164 //---------------------------------------------------------------------- 165 // Path and arg accessors 166 //---------------------------------------------------------------------- 167 const char *Path() const { return m_path.c_str(); } 168 size_t ArgumentCount() const { return m_args.size(); } 169 const char *ArgumentAtIndex(size_t arg_idx) const { 170 if (arg_idx < m_args.size()) 171 return m_args[arg_idx].c_str(); 172 return NULL; 173 } 174 175 //---------------------------------------------------------------------- 176 // Breakpoint functions 177 //---------------------------------------------------------------------- 178 DNBBreakpoint *CreateBreakpoint(nub_addr_t addr, nub_size_t length, 179 bool hardware); 180 bool DisableBreakpoint(nub_addr_t addr, bool remove); 181 void DisableAllBreakpoints(bool remove); 182 bool EnableBreakpoint(nub_addr_t addr); 183 DNBBreakpointList &Breakpoints() { return m_breakpoints; } 184 const DNBBreakpointList &Breakpoints() const { return m_breakpoints; } 185 186 //---------------------------------------------------------------------- 187 // Watchpoint functions 188 //---------------------------------------------------------------------- 189 DNBBreakpoint *CreateWatchpoint(nub_addr_t addr, nub_size_t length, 190 uint32_t watch_type, bool hardware); 191 bool DisableWatchpoint(nub_addr_t addr, bool remove); 192 void DisableAllWatchpoints(bool remove); 193 bool EnableWatchpoint(nub_addr_t addr); 194 uint32_t GetNumSupportedHardwareWatchpoints() const; 195 DNBBreakpointList &Watchpoints() { return m_watchpoints; } 196 const DNBBreakpointList &Watchpoints() const { return m_watchpoints; } 197 198 //---------------------------------------------------------------------- 199 // Exception thread functions 200 //---------------------------------------------------------------------- 201 bool StartSTDIOThread(); 202 static void *STDIOThread(void *arg); 203 void ExceptionMessageReceived(const MachException::Message &exceptionMessage); 204 task_t ExceptionMessageBundleComplete(); 205 void SharedLibrariesUpdated(); 206 nub_size_t CopyImageInfos(struct DNBExecutableImageInfo **image_infos, 207 bool only_changed); 208 209 //---------------------------------------------------------------------- 210 // Profile functions 211 //---------------------------------------------------------------------- 212 void SetEnableAsyncProfiling(bool enable, uint64_t internal_usec, 213 DNBProfileDataScanType scan_type); 214 bool IsProfilingEnabled() { return m_profile_enabled; } 215 useconds_t ProfileInterval() { return m_profile_interval_usec; } 216 bool StartProfileThread(); 217 static void *ProfileThread(void *arg); 218 void SignalAsyncProfileData(const char *info); 219 size_t GetAsyncProfileData(char *buf, size_t buf_size); 220 221 //---------------------------------------------------------------------- 222 // Accessors 223 //---------------------------------------------------------------------- 224 pid_t ProcessID() const { return m_pid; } 225 bool ProcessIDIsValid() const { return m_pid > 0; } 226 pid_t SetProcessID(pid_t pid); 227 MachTask &Task() { return m_task; } 228 const MachTask &Task() const { return m_task; } 229 230 PThreadEvent &Events() { return m_events; } 231 const DNBRegisterSetInfo *GetRegisterSetInfo(nub_thread_t tid, 232 nub_size_t *num_reg_sets) const; 233 bool GetRegisterValue(nub_thread_t tid, uint32_t set, uint32_t reg, 234 DNBRegisterValue *reg_value) const; 235 bool SetRegisterValue(nub_thread_t tid, uint32_t set, uint32_t reg, 236 const DNBRegisterValue *value) const; 237 nub_bool_t SyncThreadState(nub_thread_t tid); 238 const char *ThreadGetName(nub_thread_t tid); 239 nub_state_t ThreadGetState(nub_thread_t tid); 240 ThreadInfo::QoS GetRequestedQoS(nub_thread_t tid, nub_addr_t tsd, 241 uint64_t dti_qos_class_index); 242 nub_addr_t GetPThreadT(nub_thread_t tid); 243 nub_addr_t GetDispatchQueueT(nub_thread_t tid); 244 nub_addr_t 245 GetTSDAddressForThread(nub_thread_t tid, 246 uint64_t plo_pthread_tsd_base_address_offset, 247 uint64_t plo_pthread_tsd_base_offset, 248 uint64_t plo_pthread_tsd_entry_size); 249 250 bool GetMachOInformationFromMemory(nub_addr_t mach_o_header_addr, 251 int wordsize, 252 struct mach_o_information &inf); 253 JSONGenerator::ObjectSP FormatDynamicLibrariesIntoJSON( 254 const std::vector<struct binary_image_information> &image_infos); 255 void GetAllLoadedBinariesViaDYLDSPI( 256 std::vector<struct binary_image_information> &image_infos); 257 JSONGenerator::ObjectSP GetLoadedDynamicLibrariesInfos( 258 nub_process_t pid, nub_addr_t image_list_address, nub_addr_t image_count); 259 JSONGenerator::ObjectSP 260 GetLibrariesInfoForAddresses(nub_process_t pid, 261 std::vector<uint64_t> &macho_addresses); 262 JSONGenerator::ObjectSP GetAllLoadedLibrariesInfos(nub_process_t pid); 263 JSONGenerator::ObjectSP GetSharedCacheInfo(nub_process_t pid); 264 265 nub_size_t GetNumThreads() const; 266 nub_thread_t GetThreadAtIndex(nub_size_t thread_idx) const; 267 nub_thread_t GetCurrentThread(); 268 nub_thread_t GetCurrentThreadMachPort(); 269 nub_thread_t SetCurrentThread(nub_thread_t tid); 270 MachThreadList &GetThreadList() { return m_thread_list; } 271 bool GetThreadStoppedReason(nub_thread_t tid, 272 struct DNBThreadStopInfo *stop_info); 273 void DumpThreadStoppedReason(nub_thread_t tid) const; 274 const char *GetThreadInfo(nub_thread_t tid) const; 275 276 nub_thread_t GetThreadIDForMachPortNumber(thread_t mach_port_number) const; 277 278 uint32_t GetCPUType(); 279 nub_state_t GetState(); 280 void SetState(nub_state_t state); 281 bool IsRunning(nub_state_t state) { 282 return state == eStateRunning || IsStepping(state); 283 } 284 bool IsStepping(nub_state_t state) { return state == eStateStepping; } 285 bool CanResume(nub_state_t state) { return state == eStateStopped; } 286 287 bool GetExitStatus(int *status) { 288 if (GetState() == eStateExited) { 289 if (status) 290 *status = m_exit_status; 291 return true; 292 } 293 return false; 294 } 295 void SetExitStatus(int status) { 296 m_exit_status = status; 297 SetState(eStateExited); 298 } 299 const char *GetExitInfo() { return m_exit_info.c_str(); } 300 301 void SetExitInfo(const char *info); 302 303 uint32_t StopCount() const { return m_stop_count; } 304 void SetChildFileDescriptors(int stdin_fileno, int stdout_fileno, 305 int stderr_fileno) { 306 m_child_stdin = stdin_fileno; 307 m_child_stdout = stdout_fileno; 308 m_child_stderr = stderr_fileno; 309 } 310 311 int GetStdinFileDescriptor() const { return m_child_stdin; } 312 int GetStdoutFileDescriptor() const { return m_child_stdout; } 313 int GetStderrFileDescriptor() const { return m_child_stderr; } 314 void AppendSTDOUT(char *s, size_t len); 315 size_t GetAvailableSTDOUT(char *buf, size_t buf_size); 316 size_t GetAvailableSTDERR(char *buf, size_t buf_size); 317 void CloseChildFileDescriptors() { 318 if (m_child_stdin >= 0) { 319 ::close(m_child_stdin); 320 m_child_stdin = -1; 321 } 322 if (m_child_stdout >= 0) { 323 ::close(m_child_stdout); 324 m_child_stdout = -1; 325 } 326 if (m_child_stderr >= 0) { 327 ::close(m_child_stderr); 328 m_child_stderr = -1; 329 } 330 } 331 332 bool ProcessUsingSpringBoard() const { 333 return (m_flags & eMachProcessFlagsUsingSBS) != 0; 334 } 335 bool ProcessUsingBackBoard() const { 336 return (m_flags & eMachProcessFlagsUsingBKS) != 0; 337 } 338 339 Genealogy::ThreadActivitySP GetGenealogyInfoForThread(nub_thread_t tid, 340 bool &timed_out); 341 342 Genealogy::ProcessExecutableInfoSP GetGenealogyImageInfo(size_t idx); 343 344 DNBProfileDataScanType GetProfileScanType() { return m_profile_scan_type; } 345 346 private: 347 enum { 348 eMachProcessFlagsNone = 0, 349 eMachProcessFlagsAttached = (1 << 0), 350 eMachProcessFlagsUsingSBS = (1 << 1), 351 eMachProcessFlagsUsingBKS = (1 << 2), 352 eMachProcessFlagsUsingFBS = (1 << 3) 353 }; 354 void Clear(bool detaching = false); 355 void ReplyToAllExceptions(); 356 void PrivateResume(); 357 358 uint32_t Flags() const { return m_flags; } 359 nub_state_t DoSIGSTOP(bool clear_bps_and_wps, bool allow_running, 360 uint32_t *thread_idx_ptr); 361 362 pid_t m_pid; // Process ID of child process 363 cpu_type_t m_cpu_type; // The CPU type of this process 364 int m_child_stdin; 365 int m_child_stdout; 366 int m_child_stderr; 367 std::string m_path; // A path to the executable if we have one 368 std::vector<std::string> 369 m_args; // The arguments with which the process was lauched 370 int m_exit_status; // The exit status for the process 371 std::string m_exit_info; // Any extra info that we may have about the exit 372 MachTask m_task; // The mach task for this process 373 uint32_t m_flags; // Process specific flags (see eMachProcessFlags enums) 374 uint32_t m_stop_count; // A count of many times have we stopped 375 pthread_t m_stdio_thread; // Thread ID for the thread that watches for child 376 // process stdio 377 PThreadMutex m_stdio_mutex; // Multithreaded protection for stdio 378 std::string m_stdout_data; 379 380 bool m_profile_enabled; // A flag to indicate if profiling is enabled 381 useconds_t m_profile_interval_usec; // If enable, the profiling interval in 382 // microseconds 383 DNBProfileDataScanType 384 m_profile_scan_type; // Indicates what needs to be profiled 385 pthread_t 386 m_profile_thread; // Thread ID for the thread that profiles the inferior 387 PThreadMutex 388 m_profile_data_mutex; // Multithreaded protection for profile info data 389 std::vector<std::string> 390 m_profile_data; // Profile data, must be protected by m_profile_data_mutex 391 392 DNBThreadResumeActions m_thread_actions; // The thread actions for the current 393 // MachProcess::Resume() call 394 MachException::Message::collection m_exception_messages; // A collection of 395 // exception messages 396 // caught when 397 // listening to the 398 // exception port 399 PThreadMutex m_exception_messages_mutex; // Multithreaded protection for 400 // m_exception_messages 401 402 MachThreadList m_thread_list; // A list of threads that is maintained/updated 403 // after each stop 404 Genealogy m_activities; // A list of activities that is updated after every 405 // stop lazily 406 nub_state_t m_state; // The state of our process 407 PThreadMutex m_state_mutex; // Multithreaded protection for m_state 408 PThreadEvent m_events; // Process related events in the child processes 409 // lifetime can be waited upon 410 PThreadEvent m_private_events; // Used to coordinate running and stopping the 411 // process without affecting m_events 412 DNBBreakpointList m_breakpoints; // Breakpoint list for this process 413 DNBBreakpointList m_watchpoints; // Watchpoint list for this process 414 DNBCallbackNameToAddress m_name_to_addr_callback; 415 void *m_name_to_addr_baton; 416 DNBCallbackCopyExecutableImageInfos m_image_infos_callback; 417 void *m_image_infos_baton; 418 std::string 419 m_bundle_id; // If we are a SB or BKS process, this will be our bundle ID. 420 int m_sent_interrupt_signo; // When we call MachProcess::Interrupt(), we want 421 // to send a single signal 422 // to the inferior and only send the signal if we aren't already stopped. 423 // If we end up sending a signal to stop the process we store it until we 424 // receive an exception with this signal. This helps us to verify we got 425 // the signal that interrupted the process. We might stop due to another 426 // reason after an interrupt signal is sent, so this helps us ensure that 427 // we don't report a spurious stop on the next resume. 428 int m_auto_resume_signo; // If we resume the process and still haven't 429 // received our interrupt signal 430 // acknownledgement, we will shortly after the next resume. We store the 431 // interrupt signal in this variable so when we get the interrupt signal 432 // as the sole reason for the process being stopped, we can auto resume 433 // the process. 434 bool m_did_exec; 435 436 void *(*m_dyld_process_info_create)(task_t task, uint64_t timestamp, 437 kern_return_t *kernelError); 438 void (*m_dyld_process_info_for_each_image)( 439 void *info, void (^callback)(uint64_t machHeaderAddress, 440 const uuid_t uuid, const char *path)); 441 void (*m_dyld_process_info_release)(void *info); 442 void (*m_dyld_process_info_get_cache)(void *info, void *cacheInfo); 443 }; 444 445 #endif // __MachProcess_h__ 446