RNBRemote.h revision 245dc927c0fc10aa4d8dda2a43a8bf35ffff53f9
1//===-- RNBRemote.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 12/12/07. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef __RNBRemote_h__ 15#define __RNBRemote_h__ 16 17#include "RNBDefs.h" 18#include "DNB.h" 19#include "RNBContext.h" 20#include "RNBSocket.h" 21#include "PThreadMutex.h" 22#include <string> 23#include <vector> 24#include <deque> 25#include <map> 26 27class RNBSocket; 28class RNBContext; 29class PThreadEvents; 30 31enum event_loop_mode { debug_nub, gdb_remote_protocol, done }; 32 33class RNBRemote 34{ 35public: 36 37 typedef enum { 38 invalid_packet = 0, 39 ack, // '+' 40 nack, // '-' 41 halt, // ^C (async halt) 42 use_extended_mode, // '!' 43 why_halted, // '?' 44 set_argv, // 'A' 45 set_bp, // 'B' 46 cont, // 'c' 47 continue_with_sig, // 'C' 48 detach, // 'D' 49 read_general_regs, // 'g' 50 write_general_regs, // 'G' 51 set_thread, // 'H' 52 step_inferior_one_cycle, // 'i' 53 signal_and_step_inf_one_cycle, // 'I' 54 kill, // 'k' 55 read_memory, // 'm' 56 write_memory, // 'M' 57 read_register, // 'p' 58 write_register, // 'P' 59 restart, // 'R' 60 single_step, // 's' 61 single_step_with_sig, // 'S' 62 search_mem_backwards, // 't' 63 thread_alive_p, // 'T' 64 vattach, // 'vAttach;pid' 65 vattachwait, // 'vAttachWait:XX...' where XX is one or more hex encoded process name ASCII bytes 66 vattachorwait, // 'vAttachOrWait:XX...' where XX is one or more hex encoded process name ASCII bytes 67 vattachname, // 'vAttachName:XX...' where XX is one or more hex encoded process name ASCII bytes 68 vcont, // 'vCont' 69 vcont_list_actions, // 'vCont?' 70 write_data_to_memory, // 'X' 71 insert_mem_bp, // 'Z0' 72 remove_mem_bp, // 'z0' 73 insert_hardware_bp, // 'Z1' 74 remove_hardware_bp, // 'z1' 75 insert_write_watch_bp, // 'Z2' 76 remove_write_watch_bp, // 'z2' 77 insert_read_watch_bp, // 'Z3' 78 remove_read_watch_bp, // 'z3' 79 insert_access_watch_bp, // 'Z4' 80 remove_access_watch_bp, // 'z4' 81 82 query_current_thread_id, // 'qC' 83 query_get_pid, // 'qGetPid' 84 query_memory_crc, // 'qCRC:' 85 query_thread_ids_first, // 'qfThreadInfo' 86 query_thread_ids_subsequent, // 'qsThreadInfo' 87 query_thread_extra_info, // 'qThreadExtraInfo' 88 query_thread_stop_info, // 'qThreadStopInfo' 89 query_image_offsets, // 'qOffsets' 90 query_symbol_lookup, // 'gSymbols' 91 query_launch_success, // 'qLaunchSuccess' 92 query_register_info, // 'qRegisterInfo' 93 query_shlib_notify_info_addr, // 'qShlibInfoAddr' 94 query_step_packet_supported, // 'qStepPacketSupported' 95 query_vattachorwait_supported, // 'qVAttachOrWaitSupported' 96 query_sync_thread_state_supported,// 'QSyncThreadState' 97 query_host_info, // 'qHostInfo' 98 query_process_info, // 'qProcessInfo' 99 pass_signals_to_inferior, // 'QPassSignals' 100 start_noack_mode, // 'QStartNoAckMode' 101 prefix_reg_packets_with_tid, // 'QPrefixRegisterPacketsWithThreadID 102 set_logging_mode, // 'QSetLogging:' 103 set_max_packet_size, // 'QSetMaxPacketSize:' 104 set_max_payload_size, // 'QSetMaxPayloadSize:' 105 set_environment_variable, // 'QEnvironment:' 106 set_environment_variable_hex, // 'QEnvironmentHexEncoded:' 107 set_launch_arch, // 'QLaunchArch:' 108 set_disable_aslr, // 'QSetDisableASLR:' 109 set_stdin, // 'QSetSTDIN:' 110 set_stdout, // 'QSetSTDOUT:' 111 set_stderr, // 'QSetSTDERR:' 112 set_working_dir, // 'QSetWorkingDir:' 113 set_list_threads_in_stop_reply, // 'QListThreadsInStopReply:' 114 sync_thread_state, // 'QSyncThreadState:' 115 memory_region_info, // 'qMemoryRegionInfo:' 116 get_profile_data, // 'qGetProfileData' 117 set_enable_profiling, // 'QSetEnableAsyncProfiling' 118 watchpoint_support_info, // 'qWatchpointSupportInfo:' 119 allocate_memory, // '_M' 120 deallocate_memory, // '_m' 121 122 unknown_type 123 } PacketEnum; 124 125 typedef rnb_err_t (RNBRemote::*HandlePacketCallback)(const char *p); 126 127 RNBRemote (); 128 ~RNBRemote (); 129 130 void Initialize(); 131 132 bool InitializeRegisters (); 133 134 rnb_err_t HandleAsyncPacket(PacketEnum *type = NULL); 135 rnb_err_t HandleReceivedPacket(PacketEnum *type = NULL); 136 137 nub_thread_t GetContinueThread () const 138 { 139 return m_continue_thread; 140 } 141 142 void SetContinueThread (nub_thread_t tid) 143 { 144 m_continue_thread = tid; 145 } 146 147 nub_thread_t GetCurrentThread () const 148 { 149 if (m_thread == 0 || m_thread == -1) 150 return DNBProcessGetCurrentThread (m_ctx.ProcessID()); 151 return m_thread; 152 } 153 154 void SetCurrentThread (nub_thread_t tid) 155 { 156 DNBProcessSetCurrentThread (m_ctx.ProcessID(), tid); 157 m_thread = tid; 158 } 159 160 static void* ThreadFunctionReadRemoteData(void *arg); 161 void StartReadRemoteDataThread (); 162 void StopReadRemoteDataThread (); 163 164 void NotifyThatProcessStopped (void); 165 166 rnb_err_t HandlePacket_A (const char *p); 167 rnb_err_t HandlePacket_H (const char *p); 168 rnb_err_t HandlePacket_qC (const char *p); 169 rnb_err_t HandlePacket_qGetPid (const char *p); 170 rnb_err_t HandlePacket_qLaunchSuccess (const char *p); 171 rnb_err_t HandlePacket_qRegisterInfo (const char *p); 172 rnb_err_t HandlePacket_qShlibInfoAddr (const char *p); 173 rnb_err_t HandlePacket_qStepPacketSupported (const char *p); 174 rnb_err_t HandlePacket_qVAttachOrWaitSupported (const char *p); 175 rnb_err_t HandlePacket_qSyncThreadStateSupported (const char *p); 176 rnb_err_t HandlePacket_qThreadInfo (const char *p); 177 rnb_err_t HandlePacket_qThreadExtraInfo (const char *p); 178 rnb_err_t HandlePacket_qThreadStopInfo (const char *p); 179 rnb_err_t HandlePacket_qHostInfo (const char *p); 180 rnb_err_t HandlePacket_qProcessInfo (const char *p); 181 rnb_err_t HandlePacket_QStartNoAckMode (const char *p); 182 rnb_err_t HandlePacket_QThreadSuffixSupported (const char *p); 183 rnb_err_t HandlePacket_QSetLogging (const char *p); 184 rnb_err_t HandlePacket_QSetDisableASLR (const char *p); 185 rnb_err_t HandlePacket_QSetSTDIO (const char *p); 186 rnb_err_t HandlePacket_QSetWorkingDir (const char *p); 187 rnb_err_t HandlePacket_QSetMaxPayloadSize (const char *p); 188 rnb_err_t HandlePacket_QSetMaxPacketSize (const char *p); 189 rnb_err_t HandlePacket_QEnvironment (const char *p); 190 rnb_err_t HandlePacket_QEnvironmentHexEncoded (const char *p); 191 rnb_err_t HandlePacket_QLaunchArch (const char *p); 192 rnb_err_t HandlePacket_QListThreadsInStopReply (const char *p); 193 rnb_err_t HandlePacket_QSyncThreadState (const char *p); 194 rnb_err_t HandlePacket_QPrefixRegisterPacketsWithThreadID (const char *p); 195 rnb_err_t HandlePacket_last_signal (const char *p); 196 rnb_err_t HandlePacket_m (const char *p); 197 rnb_err_t HandlePacket_M (const char *p); 198 rnb_err_t HandlePacket_X (const char *p); 199 rnb_err_t HandlePacket_g (const char *p); 200 rnb_err_t HandlePacket_G (const char *p); 201 rnb_err_t HandlePacket_z (const char *p); 202 rnb_err_t HandlePacket_T (const char *p); 203 rnb_err_t HandlePacket_p (const char *p); 204 rnb_err_t HandlePacket_P (const char *p); 205 rnb_err_t HandlePacket_c (const char *p); 206 rnb_err_t HandlePacket_C (const char *p); 207 rnb_err_t HandlePacket_D (const char *p); 208 rnb_err_t HandlePacket_k (const char *p); 209 rnb_err_t HandlePacket_s (const char *p); 210 rnb_err_t HandlePacket_S (const char *p); 211 rnb_err_t HandlePacket_v (const char *p); 212 rnb_err_t HandlePacket_UNIMPLEMENTED (const char *p); 213 rnb_err_t HandlePacket_ILLFORMED (const char *file, int line, const char *p, const char *description); 214 rnb_err_t HandlePacket_AllocateMemory (const char *p); 215 rnb_err_t HandlePacket_DeallocateMemory (const char *p); 216 rnb_err_t HandlePacket_MemoryRegionInfo (const char *p); 217 rnb_err_t HandlePacket_GetProfileData(const char *p); 218 rnb_err_t HandlePacket_SetEnableAsyncProfiling(const char *p); 219 rnb_err_t HandlePacket_WatchpointSupportInfo (const char *p); 220 221 rnb_err_t HandlePacket_stop_process (const char *p); 222 223 rnb_err_t SendStopReplyPacketForThread (nub_thread_t tid); 224 rnb_err_t SendHexEncodedBytePacket (const char *header, const void *buf, size_t buf_len, const char *footer); 225 rnb_err_t SendSTDOUTPacket (char *buf, nub_size_t buf_size); 226 rnb_err_t SendSTDERRPacket (char *buf, nub_size_t buf_size); 227 void FlushSTDIO (); 228 void SendAsyncProfileData (); 229 rnb_err_t SendAsyncProfileDataPacket (char *buf, nub_size_t buf_size); 230 231 RNBContext& Context() { return m_ctx; } 232 RNBSocket& Comm() { return m_comm; } 233 234 void 235 SetUseNativeRegisters (bool b) 236 { 237 m_use_native_regs = b; 238 } 239private: 240 // Outlaw some contructors 241 RNBRemote (const RNBRemote &); 242 243protected: 244 245 rnb_err_t GetCommData (); 246 void CommDataReceived(const std::string& data); 247 struct Packet 248 { 249 typedef std::vector<Packet> collection; 250 typedef collection::iterator iterator; 251 typedef collection::const_iterator const_iterator; 252 PacketEnum type; 253 HandlePacketCallback normal; // Function to call when inferior is halted 254 HandlePacketCallback async; // Function to call when inferior is running 255 std::string abbrev; 256 std::string printable_name; 257 258 bool 259 IsPlatformPacket () const 260 { 261 switch (type) 262 { 263 case set_logging_mode: 264 case query_host_info: 265 return true; 266 default: 267 break; 268 } 269 return false; 270 } 271 Packet() : 272 type(invalid_packet), 273 normal (NULL), 274 async (NULL), 275 abbrev (), 276 printable_name () 277 { 278 } 279 280 Packet( PacketEnum in_type, 281 HandlePacketCallback in_normal, 282 HandlePacketCallback in_async, 283 const char *in_abbrev, 284 const char *in_printable_name) : 285 type (in_type), 286 normal (in_normal), 287 async (in_async), 288 abbrev (in_abbrev), 289 printable_name (in_printable_name) 290 { 291 } 292 }; 293 294 rnb_err_t GetPacket (std::string &packet_data, RNBRemote::Packet& packet_info, bool wait); 295 rnb_err_t SendPacket (const std::string &); 296 297 void CreatePacketTable (); 298 rnb_err_t GetPacketPayload (std::string &); 299 300 nub_thread_t 301 ExtractThreadIDFromThreadSuffix (const char *p); 302 303 // gdb can send multiple Z/z packets for the same address and 304 // these calls must be ref counted. 305 struct Breakpoint 306 { 307 Breakpoint(nub_break_t breakID) : 308 m_breakID(breakID), 309 m_refCount(1) 310 { 311 } 312 313 Breakpoint() : 314 m_breakID(INVALID_NUB_BREAK_ID), 315 m_refCount(0) 316 { 317 } 318 319 Breakpoint(const Breakpoint& rhs) : 320 m_breakID(rhs.m_breakID), 321 m_refCount(rhs.m_refCount) 322 { 323 } 324 325 nub_break_t BreakID() const { return m_breakID; } 326 uint32_t RefCount() const { return m_refCount; } 327 void Release() { if (m_refCount > 0) --m_refCount; } 328 void Retain() { ++m_refCount; } 329 330 nub_break_t m_breakID; 331 uint32_t m_refCount; 332 }; 333 typedef std::map<nub_addr_t, Breakpoint> BreakpointMap; 334 typedef BreakpointMap::iterator BreakpointMapIter; 335 typedef BreakpointMap::const_iterator BreakpointMapConstIter; 336 RNBContext m_ctx; // process context 337 RNBSocket m_comm; // communication port 338 std::string m_arch; 339 nub_thread_t m_continue_thread; // thread to continue; 0 for any, -1 for all 340 nub_thread_t m_thread; // thread for other ops; 0 for any, -1 for all 341 PThreadMutex m_mutex; // Mutex that protects 342 uint32_t m_packets_recvd; 343 Packet::collection m_packets; 344 std::deque<std::string> m_rx_packets; 345 std::string m_rx_partial_data; // For packets that may come in more than one batch, anything left over can be left here 346 pthread_t m_rx_pthread; 347 BreakpointMap m_breakpoints; 348 BreakpointMap m_watchpoints; 349 uint32_t m_max_payload_size; // the maximum sized payload we should send to gdb 350 bool m_extended_mode; // are we in extended mode? 351 bool m_noack_mode; // are we in no-ack mode? 352 bool m_use_native_regs; // Use native registers by querying DNB layer for register definitions? 353 bool m_thread_suffix_supported; // Set to true if the 'p', 'P', 'g', and 'G' packets should be prefixed with the thread ID and colon: 354 // "$pRR;thread:TTTT;" instead of "$pRR" 355 // "$PRR=VVVVVVVV;thread:TTTT;" instead of "$PRR=VVVVVVVV" 356 // "$g;thread:TTTT" instead of "$g" 357 // "$GVVVVVVVVVVVVVV;thread:TTTT;#00 instead of "$GVVVVVVVVVVVVVV" 358 bool m_list_threads_in_stop_reply; 359}; 360 361/* We translate the /usr/include/mach/exception_types.h exception types 362 (e.g. EXC_BAD_ACCESS) to the fake BSD signal numbers that gdb uses 363 in include/gdb/signals.h (e.g. TARGET_EXC_BAD_ACCESS). These hard 364 coded values for TARGET_EXC_BAD_ACCESS et al must match the gdb 365 values in its include/gdb/signals.h. */ 366 367#define TARGET_EXC_BAD_ACCESS 0x91 368#define TARGET_EXC_BAD_INSTRUCTION 0x92 369#define TARGET_EXC_ARITHMETIC 0x93 370#define TARGET_EXC_EMULATION 0x94 371#define TARGET_EXC_SOFTWARE 0x95 372#define TARGET_EXC_BREAKPOINT 0x96 373 374/* Generally speaking, you can't assume gdb can receive more than 399 bytes 375 at a time with a random gdb. This bufsize constant is only specifying 376 how many bytes gdb can *receive* from debugserver -- it tells us nothing 377 about how many bytes gdb might try to send in a single packet. */ 378#define DEFAULT_GDB_REMOTE_PROTOCOL_BUFSIZE 399 379 380#endif // #ifndef __RNBRemote_h__ 381