1 //===-- MachProcess.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 // Created by Greg Clayton on 6/15/07. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef __MachProcess_h__ 14 #define __MachProcess_h__ 15 16 #include <CoreFoundation/CoreFoundation.h> 17 #include <mach-o/loader.h> 18 #include <mach/mach.h> 19 #include <pthread.h> 20 #include <sys/signal.h> 21 #include <uuid/uuid.h> 22 #include <vector> 23 24 #include "DNBBreakpoint.h" 25 #include "DNBDefs.h" 26 #include "DNBError.h" 27 #include "DNBThreadResumeActions.h" 28 #include "Genealogy.h" 29 #include "JSONGenerator.h" 30 #include "MachException.h" 31 #include "MachTask.h" 32 #include "MachThreadList.h" 33 #include "MachVMMemory.h" 34 #include "PThreadCondition.h" 35 #include "PThreadEvent.h" 36 #include "PThreadMutex.h" 37 #include "ThreadInfo.h" 38 39 class DNBThreadResumeActions; 40 41 class MachProcess { 42 public: 43 // Constructors and Destructors 44 MachProcess(); 45 ~MachProcess(); 46 47 // A structure that can hold everything debugserver needs to know from 48 // a binary's Mach-O header / load commands. 49 50 struct mach_o_segment { 51 std::string name; 52 uint64_t vmaddr; 53 uint64_t vmsize; 54 uint64_t fileoff; 55 uint64_t filesize; 56 uint64_t maxprot; 57 uint64_t initprot; 58 uint64_t nsects; 59 uint64_t flags; 60 }; 61 62 struct mach_o_information { 63 struct mach_header_64 mach_header; 64 std::vector<struct mach_o_segment> segments; 65 uuid_t uuid; 66 std::string min_version_os_name; 67 std::string min_version_os_version; 68 }; 69 70 struct binary_image_information { 71 std::string filename; 72 uint64_t load_address; 73 uint64_t mod_date; // may not be available - 0 if so 74 struct mach_o_information macho_info; 75 76 binary_image_information() 77 : filename(), load_address(INVALID_NUB_ADDRESS), mod_date(0) {} 78 }; 79 80 // Child process control 81 pid_t AttachForDebug(pid_t pid, char *err_str, size_t err_len); 82 pid_t LaunchForDebug(const char *path, char const *argv[], char const *envp[], 83 const char *working_directory, const char *stdin_path, 84 const char *stdout_path, const char *stderr_path, 85 bool no_stdio, nub_launch_flavor_t launch_flavor, 86 int disable_aslr, const char *event_data, DNBError &err); 87 88 static uint32_t GetCPUTypeForLocalProcess(pid_t pid); 89 static pid_t ForkChildForPTraceDebugging(const char *path, char const *argv[], 90 char const *envp[], 91 MachProcess *process, DNBError &err); 92 static pid_t PosixSpawnChildForPTraceDebugging( 93 const char *path, cpu_type_t cpu_type, char const *argv[], 94 char const *envp[], const char *working_directory, const char *stdin_path, 95 const char *stdout_path, const char *stderr_path, bool no_stdio, 96 MachProcess *process, int disable_aslr, DNBError &err); 97 nub_addr_t GetDYLDAllImageInfosAddress(); 98 static const void *PrepareForAttach(const char *path, 99 nub_launch_flavor_t launch_flavor, 100 bool waitfor, DNBError &err_str); 101 static void CleanupAfterAttach(const void *attach_token, 102 nub_launch_flavor_t launch_flavor, 103 bool success, DNBError &err_str); 104 static nub_process_t CheckForProcess(const void *attach_token, 105 nub_launch_flavor_t launch_flavor); 106 #if defined(WITH_BKS) || defined(WITH_FBS) 107 pid_t BoardServiceLaunchForDebug(const char *app_bundle_path, 108 char const *argv[], char const *envp[], 109 bool no_stdio, bool disable_aslr, 110 const char *event_data, 111 DNBError &launch_err); 112 pid_t BoardServiceForkChildForPTraceDebugging( 113 const char *path, char const *argv[], char const *envp[], bool no_stdio, 114 bool disable_aslr, const char *event_data, DNBError &launch_err); 115 bool BoardServiceSendEvent(const char *event, DNBError &error); 116 #endif 117 static bool GetOSVersionNumbers(uint64_t *major, uint64_t *minor, 118 uint64_t *patch); 119 #ifdef WITH_BKS 120 static void BKSCleanupAfterAttach(const void *attach_token, 121 DNBError &err_str); 122 #endif // WITH_BKS 123 #ifdef WITH_FBS 124 static void FBSCleanupAfterAttach(const void *attach_token, 125 DNBError &err_str); 126 #endif // WITH_FBS 127 #ifdef WITH_SPRINGBOARD 128 pid_t SBLaunchForDebug(const char *app_bundle_path, char const *argv[], 129 char const *envp[], bool no_stdio, bool disable_aslr, 130 DNBError &launch_err); 131 static pid_t SBForkChildForPTraceDebugging(const char *path, 132 char const *argv[], 133 char const *envp[], bool no_stdio, 134 MachProcess *process, 135 DNBError &launch_err); 136 #endif // WITH_SPRINGBOARD 137 nub_addr_t LookupSymbol(const char *name, const char *shlib); 138 void SetNameToAddressCallback(DNBCallbackNameToAddress callback, 139 void *baton) { 140 m_name_to_addr_callback = callback; 141 m_name_to_addr_baton = baton; 142 } 143 void 144 SetSharedLibraryInfoCallback(DNBCallbackCopyExecutableImageInfos callback, 145 void *baton) { 146 m_image_infos_callback = callback; 147 m_image_infos_baton = baton; 148 } 149 150 bool Resume(const DNBThreadResumeActions &thread_actions); 151 bool Signal(int signal, const struct timespec *timeout_abstime = NULL); 152 bool Interrupt(); 153 bool SendEvent(const char *event, DNBError &send_err); 154 bool Kill(const struct timespec *timeout_abstime = NULL); 155 bool Detach(); 156 nub_size_t ReadMemory(nub_addr_t addr, nub_size_t size, void *buf); 157 nub_size_t WriteMemory(nub_addr_t addr, nub_size_t size, const void *buf); 158 159 // Path and arg accessors 160 const char *Path() const { return m_path.c_str(); } 161 size_t ArgumentCount() const { return m_args.size(); } 162 const char *ArgumentAtIndex(size_t arg_idx) const { 163 if (arg_idx < m_args.size()) 164 return m_args[arg_idx].c_str(); 165 return NULL; 166 } 167 168 // Breakpoint functions 169 DNBBreakpoint *CreateBreakpoint(nub_addr_t addr, nub_size_t length, 170 bool hardware); 171 bool DisableBreakpoint(nub_addr_t addr, bool remove); 172 void DisableAllBreakpoints(bool remove); 173 bool EnableBreakpoint(nub_addr_t addr); 174 DNBBreakpointList &Breakpoints() { return m_breakpoints; } 175 const DNBBreakpointList &Breakpoints() const { return m_breakpoints; } 176 177 // Watchpoint functions 178 DNBBreakpoint *CreateWatchpoint(nub_addr_t addr, nub_size_t length, 179 uint32_t watch_type, bool hardware); 180 bool DisableWatchpoint(nub_addr_t addr, bool remove); 181 void DisableAllWatchpoints(bool remove); 182 bool EnableWatchpoint(nub_addr_t addr); 183 uint32_t GetNumSupportedHardwareWatchpoints() const; 184 DNBBreakpointList &Watchpoints() { return m_watchpoints; } 185 const DNBBreakpointList &Watchpoints() const { return m_watchpoints; } 186 187 // Exception thread functions 188 bool StartSTDIOThread(); 189 static void *STDIOThread(void *arg); 190 void ExceptionMessageReceived(const MachException::Message &exceptionMessage); 191 task_t ExceptionMessageBundleComplete(); 192 void SharedLibrariesUpdated(); 193 nub_size_t CopyImageInfos(struct DNBExecutableImageInfo **image_infos, 194 bool only_changed); 195 196 // Profile functions 197 void SetEnableAsyncProfiling(bool enable, uint64_t internal_usec, 198 DNBProfileDataScanType scan_type); 199 bool IsProfilingEnabled() { return m_profile_enabled; } 200 useconds_t ProfileInterval() { return m_profile_interval_usec; } 201 bool StartProfileThread(); 202 static void *ProfileThread(void *arg); 203 void SignalAsyncProfileData(const char *info); 204 size_t GetAsyncProfileData(char *buf, size_t buf_size); 205 206 // Accessors 207 pid_t ProcessID() const { return m_pid; } 208 bool ProcessIDIsValid() const { return m_pid > 0; } 209 pid_t SetProcessID(pid_t pid); 210 MachTask &Task() { return m_task; } 211 const MachTask &Task() const { return m_task; } 212 213 PThreadEvent &Events() { return m_events; } 214 const DNBRegisterSetInfo *GetRegisterSetInfo(nub_thread_t tid, 215 nub_size_t *num_reg_sets) const; 216 bool GetRegisterValue(nub_thread_t tid, uint32_t set, uint32_t reg, 217 DNBRegisterValue *reg_value) const; 218 bool SetRegisterValue(nub_thread_t tid, uint32_t set, uint32_t reg, 219 const DNBRegisterValue *value) const; 220 nub_bool_t SyncThreadState(nub_thread_t tid); 221 const char *ThreadGetName(nub_thread_t tid); 222 nub_state_t ThreadGetState(nub_thread_t tid); 223 ThreadInfo::QoS GetRequestedQoS(nub_thread_t tid, nub_addr_t tsd, 224 uint64_t dti_qos_class_index); 225 nub_addr_t GetPThreadT(nub_thread_t tid); 226 nub_addr_t GetDispatchQueueT(nub_thread_t tid); 227 nub_addr_t 228 GetTSDAddressForThread(nub_thread_t tid, 229 uint64_t plo_pthread_tsd_base_address_offset, 230 uint64_t plo_pthread_tsd_base_offset, 231 uint64_t plo_pthread_tsd_entry_size); 232 const char * 233 GetDeploymentInfo(const struct load_command&, uint64_t load_command_address, 234 uint32_t& major_version, uint32_t& minor_version, 235 uint32_t& patch_version); 236 bool GetMachOInformationFromMemory(nub_addr_t mach_o_header_addr, 237 int wordsize, 238 struct mach_o_information &inf); 239 JSONGenerator::ObjectSP FormatDynamicLibrariesIntoJSON( 240 const std::vector<struct binary_image_information> &image_infos); 241 void GetAllLoadedBinariesViaDYLDSPI( 242 std::vector<struct binary_image_information> &image_infos); 243 JSONGenerator::ObjectSP GetLoadedDynamicLibrariesInfos( 244 nub_process_t pid, nub_addr_t image_list_address, nub_addr_t image_count); 245 JSONGenerator::ObjectSP 246 GetLibrariesInfoForAddresses(nub_process_t pid, 247 std::vector<uint64_t> &macho_addresses); 248 JSONGenerator::ObjectSP GetAllLoadedLibrariesInfos(nub_process_t pid); 249 JSONGenerator::ObjectSP GetSharedCacheInfo(nub_process_t pid); 250 251 nub_size_t GetNumThreads() const; 252 nub_thread_t GetThreadAtIndex(nub_size_t thread_idx) const; 253 nub_thread_t GetCurrentThread(); 254 nub_thread_t GetCurrentThreadMachPort(); 255 nub_thread_t SetCurrentThread(nub_thread_t tid); 256 MachThreadList &GetThreadList() { return m_thread_list; } 257 bool GetThreadStoppedReason(nub_thread_t tid, 258 struct DNBThreadStopInfo *stop_info); 259 void DumpThreadStoppedReason(nub_thread_t tid) const; 260 const char *GetThreadInfo(nub_thread_t tid) const; 261 262 nub_thread_t GetThreadIDForMachPortNumber(thread_t mach_port_number) const; 263 264 uint32_t GetCPUType(); 265 nub_state_t GetState(); 266 void SetState(nub_state_t state); 267 bool IsRunning(nub_state_t state) { 268 return state == eStateRunning || IsStepping(state); 269 } 270 bool IsStepping(nub_state_t state) { return state == eStateStepping; } 271 bool CanResume(nub_state_t state) { return state == eStateStopped; } 272 273 bool GetExitStatus(int *status) { 274 if (GetState() == eStateExited) { 275 if (status) 276 *status = m_exit_status; 277 return true; 278 } 279 return false; 280 } 281 void SetExitStatus(int status) { 282 m_exit_status = status; 283 SetState(eStateExited); 284 } 285 const char *GetExitInfo() { return m_exit_info.c_str(); } 286 287 void SetExitInfo(const char *info); 288 289 uint32_t StopCount() const { return m_stop_count; } 290 void SetChildFileDescriptors(int stdin_fileno, int stdout_fileno, 291 int stderr_fileno) { 292 m_child_stdin = stdin_fileno; 293 m_child_stdout = stdout_fileno; 294 m_child_stderr = stderr_fileno; 295 } 296 297 int GetStdinFileDescriptor() const { return m_child_stdin; } 298 int GetStdoutFileDescriptor() const { return m_child_stdout; } 299 int GetStderrFileDescriptor() const { return m_child_stderr; } 300 void AppendSTDOUT(char *s, size_t len); 301 size_t GetAvailableSTDOUT(char *buf, size_t buf_size); 302 size_t GetAvailableSTDERR(char *buf, size_t buf_size); 303 void CloseChildFileDescriptors() { 304 if (m_child_stdin >= 0) { 305 ::close(m_child_stdin); 306 m_child_stdin = -1; 307 } 308 if (m_child_stdout >= 0) { 309 ::close(m_child_stdout); 310 m_child_stdout = -1; 311 } 312 if (m_child_stderr >= 0) { 313 ::close(m_child_stderr); 314 m_child_stderr = -1; 315 } 316 } 317 318 void CalculateBoardStatus(); 319 320 bool ProcessUsingBackBoard(); 321 322 bool ProcessUsingFrontBoard(); 323 324 Genealogy::ThreadActivitySP GetGenealogyInfoForThread(nub_thread_t tid, 325 bool &timed_out); 326 327 Genealogy::ProcessExecutableInfoSP GetGenealogyImageInfo(size_t idx); 328 329 DNBProfileDataScanType GetProfileScanType() { return m_profile_scan_type; } 330 331 private: 332 enum { 333 eMachProcessFlagsNone = 0, 334 eMachProcessFlagsAttached = (1 << 0), 335 eMachProcessFlagsUsingBKS = (1 << 2), // only read via ProcessUsingBackBoard() 336 eMachProcessFlagsUsingFBS = (1 << 3), // only read via ProcessUsingFrontBoard() 337 eMachProcessFlagsBoardCalculated = (1 << 4) 338 }; 339 void Clear(bool detaching = false); 340 void ReplyToAllExceptions(); 341 void PrivateResume(); 342 343 uint32_t Flags() const { return m_flags; } 344 nub_state_t DoSIGSTOP(bool clear_bps_and_wps, bool allow_running, 345 uint32_t *thread_idx_ptr); 346 347 pid_t m_pid; // Process ID of child process 348 cpu_type_t m_cpu_type; // The CPU type of this process 349 int m_child_stdin; 350 int m_child_stdout; 351 int m_child_stderr; 352 std::string m_path; // A path to the executable if we have one 353 std::vector<std::string> 354 m_args; // The arguments with which the process was lauched 355 int m_exit_status; // The exit status for the process 356 std::string m_exit_info; // Any extra info that we may have about the exit 357 MachTask m_task; // The mach task for this process 358 uint32_t m_flags; // Process specific flags (see eMachProcessFlags enums) 359 uint32_t m_stop_count; // A count of many times have we stopped 360 pthread_t m_stdio_thread; // Thread ID for the thread that watches for child 361 // process stdio 362 PThreadMutex m_stdio_mutex; // Multithreaded protection for stdio 363 std::string m_stdout_data; 364 365 bool m_profile_enabled; // A flag to indicate if profiling is enabled 366 useconds_t m_profile_interval_usec; // If enable, the profiling interval in 367 // microseconds 368 DNBProfileDataScanType 369 m_profile_scan_type; // Indicates what needs to be profiled 370 pthread_t 371 m_profile_thread; // Thread ID for the thread that profiles the inferior 372 PThreadMutex 373 m_profile_data_mutex; // Multithreaded protection for profile info data 374 std::vector<std::string> 375 m_profile_data; // Profile data, must be protected by m_profile_data_mutex 376 377 DNBThreadResumeActions m_thread_actions; // The thread actions for the current 378 // MachProcess::Resume() call 379 MachException::Message::collection m_exception_messages; // A collection of 380 // exception messages 381 // caught when 382 // listening to the 383 // exception port 384 PThreadMutex m_exception_messages_mutex; // Multithreaded protection for 385 // m_exception_messages 386 387 MachThreadList m_thread_list; // A list of threads that is maintained/updated 388 // after each stop 389 Genealogy m_activities; // A list of activities that is updated after every 390 // stop lazily 391 nub_state_t m_state; // The state of our process 392 PThreadMutex m_state_mutex; // Multithreaded protection for m_state 393 PThreadEvent m_events; // Process related events in the child processes 394 // lifetime can be waited upon 395 PThreadEvent m_private_events; // Used to coordinate running and stopping the 396 // process without affecting m_events 397 DNBBreakpointList m_breakpoints; // Breakpoint list for this process 398 DNBBreakpointList m_watchpoints; // Watchpoint list for this process 399 DNBCallbackNameToAddress m_name_to_addr_callback; 400 void *m_name_to_addr_baton; 401 DNBCallbackCopyExecutableImageInfos m_image_infos_callback; 402 void *m_image_infos_baton; 403 std::string 404 m_bundle_id; // If we are a SB or BKS process, this will be our bundle ID. 405 int m_sent_interrupt_signo; // When we call MachProcess::Interrupt(), we want 406 // to send a single signal 407 // to the inferior and only send the signal if we aren't already stopped. 408 // If we end up sending a signal to stop the process we store it until we 409 // receive an exception with this signal. This helps us to verify we got 410 // the signal that interrupted the process. We might stop due to another 411 // reason after an interrupt signal is sent, so this helps us ensure that 412 // we don't report a spurious stop on the next resume. 413 int m_auto_resume_signo; // If we resume the process and still haven't 414 // received our interrupt signal 415 // acknownledgement, we will shortly after the next resume. We store the 416 // interrupt signal in this variable so when we get the interrupt signal 417 // as the sole reason for the process being stopped, we can auto resume 418 // the process. 419 bool m_did_exec; 420 421 void *(*m_dyld_process_info_create)(task_t task, uint64_t timestamp, 422 kern_return_t *kernelError); 423 void (*m_dyld_process_info_for_each_image)( 424 void *info, void (^callback)(uint64_t machHeaderAddress, 425 const uuid_t uuid, const char *path)); 426 void (*m_dyld_process_info_release)(void *info); 427 void (*m_dyld_process_info_get_cache)(void *info, void *cacheInfo); 428 }; 429 430 #endif // __MachProcess_h__ 431