MachProcess.h revision dc8ff30b6dbe28c851e99712e20c1358eca4709d
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 35class DNBThreadResumeActions; 36 37class MachProcess 38{ 39public: 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 bool IsAddressExecutable(nub_addr_t address); 103 104 //---------------------------------------------------------------------- 105 // Path and arg accessors 106 //---------------------------------------------------------------------- 107 const char * Path () const { return m_path.c_str(); } 108 size_t ArgumentCount () const { return m_args.size(); } 109 const char * ArgumentAtIndex (size_t arg_idx) const 110 { 111 if (arg_idx < m_args.size()) 112 return m_args[arg_idx].c_str(); 113 return NULL; 114 } 115 116 //---------------------------------------------------------------------- 117 // Breakpoint functions 118 //---------------------------------------------------------------------- 119 nub_break_t CreateBreakpoint (nub_addr_t addr, nub_size_t length, bool hardware, thread_t thread); 120 bool DisableBreakpoint (nub_break_t breakID, bool remove); 121 nub_size_t DisableAllBreakpoints (bool remove); 122 bool EnableBreakpoint (nub_break_t breakID); 123 void DumpBreakpoint(nub_break_t breakID) const; 124 DNBBreakpointList& Breakpoints() { return m_breakpoints; } 125 const DNBBreakpointList& Breakpoints() const { return m_breakpoints; } 126 127 //---------------------------------------------------------------------- 128 // Watchpoint functions 129 //---------------------------------------------------------------------- 130 nub_watch_t CreateWatchpoint (nub_addr_t addr, nub_size_t length, uint32_t watch_type, bool hardware, thread_t thread); 131 bool DisableWatchpoint (nub_watch_t watchID, bool remove); 132 nub_size_t DisableAllWatchpoints (bool remove); 133 bool EnableWatchpoint (nub_watch_t watchID); 134 void DumpWatchpoint(nub_watch_t watchID) const; 135 DNBBreakpointList& Watchpoints() { return m_watchpoints; } 136 const DNBBreakpointList& Watchpoints() const { return m_watchpoints; } 137 138 //---------------------------------------------------------------------- 139 // Exception thread functions 140 //---------------------------------------------------------------------- 141 bool StartSTDIOThread (); 142 static void * STDIOThread (void *arg); 143 void ExceptionMessageReceived (const MachException::Message& exceptionMessage); 144 void ExceptionMessageBundleComplete (); 145 void SharedLibrariesUpdated (); 146 nub_size_t CopyImageInfos (struct DNBExecutableImageInfo **image_infos, bool only_changed); 147 148 //---------------------------------------------------------------------- 149 // Accessors 150 //---------------------------------------------------------------------- 151 pid_t ProcessID () const { return m_pid; } 152 bool ProcessIDIsValid () const { return m_pid > 0; } 153 pid_t SetProcessID (pid_t pid); 154 MachTask& Task() { return m_task; } 155 const MachTask& Task() const { return m_task; } 156 157 PThreadEvent& Events() { return m_events; } 158 const DNBRegisterSetInfo * 159 GetRegisterSetInfo (nub_thread_t tid, nub_size_t *num_reg_sets) const; 160 bool GetRegisterValue (nub_thread_t tid, uint32_t set, uint32_t reg, DNBRegisterValue *reg_value) const; 161 bool SetRegisterValue (nub_thread_t tid, uint32_t set, uint32_t reg, const DNBRegisterValue *value) const; 162 const char * ThreadGetName (nub_thread_t tid); 163 nub_state_t ThreadGetState (nub_thread_t tid); 164 nub_size_t GetNumThreads () const; 165 nub_thread_t GetThreadAtIndex (nub_size_t thread_idx) const; 166 nub_thread_t GetCurrentThread (); 167 nub_thread_t SetCurrentThread (nub_thread_t tid); 168 MachThreadList & GetThreadList() { return m_thread_list; } 169 bool GetThreadStoppedReason(nub_thread_t tid, struct DNBThreadStopInfo *stop_info) const; 170 void DumpThreadStoppedReason(nub_thread_t tid) const; 171 const char * GetThreadInfo (nub_thread_t tid) const; 172 173 uint32_t GetCPUType (); 174 nub_state_t GetState (); 175 void SetState (nub_state_t state); 176 bool IsRunning (nub_state_t state) 177 { 178 return state == eStateRunning || IsStepping(state); 179 } 180 bool IsStepping (nub_state_t state) 181 { 182 return state == eStateStepping; 183 } 184 bool CanResume (nub_state_t state) 185 { 186 return state == eStateStopped; 187 } 188 189 bool GetExitStatus(int* status) 190 { 191 if (GetState() == eStateExited) 192 { 193 if (status) 194 *status = m_exit_status; 195 return true; 196 } 197 return false; 198 } 199 void SetExitStatus(int status) 200 { 201 m_exit_status = status; 202 SetState(eStateExited); 203 } 204 205 uint32_t StopCount() const { return m_stop_count; } 206 void SetChildFileDescriptors (int stdin_fileno, int stdout_fileno, int stderr_fileno) 207 { 208 m_child_stdin = stdin_fileno; 209 m_child_stdout = stdout_fileno; 210 m_child_stderr = stderr_fileno; 211 } 212 213 int GetStdinFileDescriptor () const { return m_child_stdin; } 214 int GetStdoutFileDescriptor () const { return m_child_stdout; } 215 int GetStderrFileDescriptor () const { return m_child_stderr; } 216 void AppendSTDOUT (char* s, size_t len); 217 size_t GetAvailableSTDOUT (char *buf, size_t buf_size); 218 size_t GetAvailableSTDERR (char *buf, size_t buf_size); 219 void CloseChildFileDescriptors () 220 { 221 if (m_child_stdin >= 0) 222 { 223 ::close (m_child_stdin); 224 m_child_stdin = -1; 225 } 226 if (m_child_stdout >= 0) 227 { 228 ::close (m_child_stdout); 229 m_child_stdout = -1; 230 } 231 if (m_child_stderr >= 0) 232 { 233 ::close (m_child_stderr); 234 m_child_stderr = -1; 235 } 236 } 237 238 bool ProcessUsingSpringBoard() const { return (m_flags & eMachProcessFlagsUsingSBS) != 0; } 239private: 240 enum 241 { 242 eMachProcessFlagsNone = 0, 243 eMachProcessFlagsAttached = (1 << 0), 244 eMachProcessFlagsUsingSBS = (1 << 1) 245 }; 246 void Clear (); 247 void ReplyToAllExceptions (); 248 void PrivateResume (); 249 nub_size_t RemoveTrapsFromBuffer (nub_addr_t addr, nub_size_t size, uint8_t *buf) const; 250 251 uint32_t Flags () const { return m_flags; } 252 nub_state_t DoSIGSTOP (bool clear_bps_and_wps, uint32_t *thread_idx_ptr = NULL); 253 254 pid_t m_pid; // Process ID of child process 255 cpu_type_t m_cpu_type; // The CPU type of this process 256 int m_child_stdin; 257 int m_child_stdout; 258 int m_child_stderr; 259 std::string m_path; // A path to the executable if we have one 260 std::vector<std::string> m_args; // The arguments with which the process was lauched 261 int m_exit_status; // The exit status for the process 262 MachTask m_task; // The mach task for this process 263 uint32_t m_flags; // Process specific flags (see eMachProcessFlags enums) 264 uint32_t m_stop_count; // A count of many times have we stopped 265 pthread_t m_stdio_thread; // Thread ID for the thread that watches for child process stdio 266 PThreadMutex m_stdio_mutex; // Multithreaded protection for stdio 267 std::string m_stdout_data; 268 DNBThreadResumeActions m_thread_actions; // The thread actions for the current MachProcess::Resume() call 269 MachException::Message::collection 270 m_exception_messages; // A collection of exception messages caught when listening to the exception port 271 PThreadMutex m_exception_messages_mutex; // Multithreaded protection for m_exception_messages 272 273 MachThreadList m_thread_list; // A list of threads that is maintained/updated after each stop 274 nub_state_t m_state; // The state of our process 275 PThreadMutex m_state_mutex; // Multithreaded protection for m_state 276 PThreadEvent m_events; // Process related events in the child processes lifetime can be waited upon 277 DNBBreakpointList m_breakpoints; // Breakpoint list for this process 278 DNBBreakpointList m_watchpoints; // Watchpoint list for this process 279 DNBCallbackNameToAddress m_name_to_addr_callback; 280 void * m_name_to_addr_baton; 281 DNBCallbackCopyExecutableImageInfos 282 m_image_infos_callback; 283 void * m_image_infos_baton; 284}; 285 286 287#endif // __MachProcess_h__ 288