Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 1 | //===-- GDBRemoteCommunication.cpp ------------------------------*- 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 | |
| 11 | #include "GDBRemoteCommunication.h" |
| 12 | |
| 13 | // C Includes |
| 14 | // C++ Includes |
| 15 | // Other libraries and framework includes |
Jim Ingham | 84cdc15 | 2010-06-15 19:49:27 +0000 | [diff] [blame] | 16 | #include "lldb/Interpreter/Args.h" |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 17 | #include "lldb/Core/ConnectionFileDescriptor.h" |
| 18 | #include "lldb/Core/Log.h" |
| 19 | #include "lldb/Core/State.h" |
| 20 | #include "lldb/Core/StreamString.h" |
| 21 | #include "lldb/Host/TimeValue.h" |
| 22 | |
| 23 | // Project includes |
Greg Clayton | 54e7afa | 2010-07-09 20:39:50 +0000 | [diff] [blame] | 24 | #include "Utility/StringExtractorGDBRemote.h" |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 25 | #include "ProcessGDBRemote.h" |
| 26 | #include "ProcessGDBRemoteLog.h" |
| 27 | |
| 28 | using namespace lldb; |
| 29 | using namespace lldb_private; |
| 30 | |
| 31 | //---------------------------------------------------------------------- |
| 32 | // GDBRemoteCommunication constructor |
| 33 | //---------------------------------------------------------------------- |
| 34 | GDBRemoteCommunication::GDBRemoteCommunication() : |
| 35 | Communication("gdb-remote.packets"), |
| 36 | m_send_acks (true), |
| 37 | m_rx_packet_listener ("gdbremote.rx_packet"), |
| 38 | m_sequence_mutex (Mutex::eMutexTypeRecursive), |
| 39 | m_is_running (false), |
| 40 | m_async_mutex (Mutex::eMutexTypeRecursive), |
| 41 | m_async_packet_predicate (false), |
| 42 | m_async_packet (), |
| 43 | m_async_response (), |
| 44 | m_async_timeout (UINT32_MAX), |
| 45 | m_async_signal (-1), |
| 46 | m_arch(), |
| 47 | m_os(), |
| 48 | m_vendor(), |
| 49 | m_byte_order(eByteOrderHost), |
| 50 | m_pointer_byte_size(0) |
| 51 | { |
| 52 | m_rx_packet_listener.StartListeningForEvents(this, |
| 53 | Communication::eBroadcastBitPacketAvailable | |
| 54 | Communication::eBroadcastBitReadThreadDidExit); |
| 55 | } |
| 56 | |
| 57 | //---------------------------------------------------------------------- |
| 58 | // Destructor |
| 59 | //---------------------------------------------------------------------- |
| 60 | GDBRemoteCommunication::~GDBRemoteCommunication() |
| 61 | { |
| 62 | m_rx_packet_listener.StopListeningForEvents(this, |
| 63 | Communication::eBroadcastBitPacketAvailable | |
| 64 | Communication::eBroadcastBitReadThreadDidExit); |
| 65 | if (IsConnected()) |
| 66 | { |
| 67 | StopReadThread(); |
| 68 | Disconnect(); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | |
| 73 | char |
| 74 | GDBRemoteCommunication::CalculcateChecksum (const char *payload, size_t payload_length) |
| 75 | { |
| 76 | int checksum = 0; |
| 77 | |
| 78 | // We only need to compute the checksum if we are sending acks |
| 79 | if (m_send_acks) |
| 80 | { |
Greg Clayton | 54e7afa | 2010-07-09 20:39:50 +0000 | [diff] [blame] | 81 | for (size_t i = 0; i < payload_length; ++i) |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 82 | checksum += payload[i]; |
| 83 | } |
| 84 | return checksum & 255; |
| 85 | } |
| 86 | |
| 87 | size_t |
| 88 | GDBRemoteCommunication::SendAck (char ack_char) |
| 89 | { |
| 90 | Mutex::Locker locker(m_sequence_mutex); |
| 91 | ProcessGDBRemoteLog::LogIf (GDBR_LOG_PACKETS, "send packet: %c", ack_char); |
| 92 | ConnectionStatus status = eConnectionStatusSuccess; |
| 93 | return Write (&ack_char, 1, status, NULL) == 1; |
| 94 | } |
| 95 | |
| 96 | size_t |
| 97 | GDBRemoteCommunication::SendPacketAndWaitForResponse |
| 98 | ( |
| 99 | const char *payload, |
| 100 | StringExtractorGDBRemote &response, |
| 101 | uint32_t timeout_seconds, |
| 102 | bool send_async |
| 103 | ) |
| 104 | { |
| 105 | return SendPacketAndWaitForResponse (payload, |
| 106 | ::strlen (payload), |
| 107 | response, |
| 108 | timeout_seconds, |
| 109 | send_async); |
| 110 | } |
| 111 | |
| 112 | size_t |
| 113 | GDBRemoteCommunication::SendPacketAndWaitForResponse |
| 114 | ( |
| 115 | const char *payload, |
| 116 | size_t payload_length, |
| 117 | StringExtractorGDBRemote &response, |
| 118 | uint32_t timeout_seconds, |
| 119 | bool send_async |
| 120 | ) |
| 121 | { |
| 122 | Mutex::Locker locker; |
| 123 | TimeValue timeout_time; |
| 124 | timeout_time = TimeValue::Now(); |
| 125 | timeout_time.OffsetWithSeconds (timeout_seconds); |
| 126 | |
| 127 | if (locker.TryLock (m_sequence_mutex.GetMutex())) |
| 128 | { |
| 129 | if (SendPacketNoLock (payload, strlen(payload))) |
| 130 | return WaitForPacketNoLock (response, &timeout_time); |
| 131 | } |
| 132 | else |
| 133 | { |
| 134 | if (send_async) |
| 135 | { |
| 136 | Mutex::Locker async_locker (m_async_mutex); |
| 137 | m_async_packet.assign(payload, payload_length); |
| 138 | m_async_timeout = timeout_seconds; |
| 139 | m_async_packet_predicate.SetValue (true, eBroadcastNever); |
| 140 | |
| 141 | bool timed_out = false; |
| 142 | if (SendInterrupt(1, &timed_out)) |
| 143 | { |
| 144 | if (m_async_packet_predicate.WaitForValueEqualTo (false, &timeout_time, &timed_out)) |
| 145 | { |
| 146 | response = m_async_response; |
| 147 | return response.GetStringRef().size(); |
| 148 | } |
| 149 | } |
| 150 | // if (timed_out) |
| 151 | // m_error.SetErrorString("Timeout."); |
| 152 | // else |
| 153 | // m_error.SetErrorString("Unknown error."); |
| 154 | } |
| 155 | else |
| 156 | { |
| 157 | // m_error.SetErrorString("Sequence mutex is locked."); |
| 158 | } |
| 159 | } |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | //template<typename _Tp> |
| 164 | //class ScopedValueChanger |
| 165 | //{ |
| 166 | //public: |
| 167 | // // Take a value reference and the value to assing it to when this class |
| 168 | // // instance goes out of scope. |
| 169 | // ScopedValueChanger (_Tp &value_ref, _Tp value) : |
| 170 | // m_value_ref (value_ref), |
| 171 | // m_value (value) |
| 172 | // { |
| 173 | // } |
| 174 | // |
| 175 | // // This object is going out of scope, change the value pointed to by |
| 176 | // // m_value_ref to the value we got during construction which was stored in |
| 177 | // // m_value; |
| 178 | // ~ScopedValueChanger () |
| 179 | // { |
| 180 | // m_value_ref = m_value; |
| 181 | // } |
| 182 | //protected: |
| 183 | // _Tp &m_value_ref; // A reference to the value we wil change when this object destructs |
| 184 | // _Tp m_value; // The value to assign to m_value_ref when this goes out of scope. |
| 185 | //}; |
| 186 | |
| 187 | StateType |
| 188 | GDBRemoteCommunication::SendContinuePacketAndWaitForResponse |
| 189 | ( |
| 190 | ProcessGDBRemote *process, |
| 191 | const char *payload, |
| 192 | size_t packet_length, |
| 193 | StringExtractorGDBRemote &response |
| 194 | ) |
| 195 | { |
| 196 | Log *log = ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS); |
| 197 | if (log) |
| 198 | log->Printf ("GDBRemoteCommunication::%s ()", __FUNCTION__); |
| 199 | |
| 200 | Mutex::Locker locker(m_sequence_mutex); |
| 201 | m_is_running.SetValue (true, eBroadcastNever); |
| 202 | |
| 203 | // ScopedValueChanger<bool> restore_running_to_false (m_is_running, false); |
| 204 | StateType state = eStateRunning; |
| 205 | |
| 206 | if (SendPacket(payload, packet_length) == 0) |
| 207 | state = eStateInvalid; |
| 208 | |
| 209 | while (state == eStateRunning) |
| 210 | { |
| 211 | if (log) |
| 212 | log->Printf ("GDBRemoteCommunication::%s () WaitForPacket(...)", __FUNCTION__); |
| 213 | |
| 214 | if (WaitForPacket (response, (TimeValue*)NULL)) |
| 215 | { |
| 216 | if (response.Empty()) |
| 217 | state = eStateInvalid; |
| 218 | else |
| 219 | { |
| 220 | const char stop_type = response.GetChar(); |
| 221 | if (log) |
| 222 | log->Printf ("GDBRemoteCommunication::%s () got '%c' packet", __FUNCTION__, stop_type); |
| 223 | switch (stop_type) |
| 224 | { |
| 225 | case 'T': |
| 226 | case 'S': |
| 227 | if (m_async_signal != -1) |
| 228 | { |
| 229 | // Save off the async signal we are supposed to send |
| 230 | const int async_signal = m_async_signal; |
| 231 | // Clear the async signal member so we don't end up |
| 232 | // sending the signal multiple times... |
| 233 | m_async_signal = -1; |
| 234 | // Check which signal we stopped with |
| 235 | uint8_t signo = response.GetHexU8(255); |
| 236 | if (signo == async_signal) |
| 237 | { |
| 238 | // We already stopped with a signal that we wanted |
| 239 | // to stop with, so we are done |
| 240 | response.SetFilePos (0); |
| 241 | } |
| 242 | else |
| 243 | { |
| 244 | // We stopped with a different signal that the one |
| 245 | // we wanted to stop with, so now we must resume |
| 246 | // with the signal we want |
| 247 | char signal_packet[32]; |
| 248 | int signal_packet_len = 0; |
| 249 | signal_packet_len = ::snprintf (signal_packet, |
| 250 | sizeof (signal_packet), |
| 251 | "C%2.2x", |
| 252 | async_signal); |
| 253 | |
| 254 | if (SendPacket(signal_packet, signal_packet_len) == 0) |
| 255 | { |
| 256 | state = eStateInvalid; |
| 257 | break; |
| 258 | } |
| 259 | else |
| 260 | continue; |
| 261 | } |
| 262 | } |
| 263 | else if (m_async_packet_predicate.GetValue()) |
| 264 | { |
| 265 | // We are supposed to send an asynchronous packet while |
| 266 | // we are running. |
| 267 | m_async_response.Clear(); |
| 268 | if (!m_async_packet.empty()) |
| 269 | { |
Greg Clayton | 53d68e7 | 2010-07-20 22:52:08 +0000 | [diff] [blame] | 270 | SendPacketAndWaitForResponse (&m_async_packet[0], |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 271 | m_async_packet.size(), |
| 272 | m_async_response, |
| 273 | m_async_timeout, |
| 274 | false); |
| 275 | } |
| 276 | // Let the other thread that was trying to send the async |
| 277 | // packet know that the packet has been sent. |
| 278 | m_async_packet_predicate.SetValue(false, eBroadcastAlways); |
| 279 | |
| 280 | // Continue again |
| 281 | if (SendPacket("c", 1) == 0) |
| 282 | { |
| 283 | state = eStateInvalid; |
| 284 | break; |
| 285 | } |
| 286 | else |
| 287 | continue; |
| 288 | } |
| 289 | // Stop with signal and thread info |
| 290 | state = eStateStopped; |
| 291 | break; |
| 292 | |
| 293 | case 'W': |
| 294 | // process exited |
| 295 | state = eStateExited; |
| 296 | break; |
| 297 | |
| 298 | case 'O': |
| 299 | // STDOUT |
| 300 | { |
| 301 | std::string inferior_stdout; |
| 302 | inferior_stdout.reserve(response.GetBytesLeft () / 2); |
| 303 | char ch; |
| 304 | while ((ch = response.GetHexU8()) != '\0') |
| 305 | inferior_stdout.append(1, ch); |
| 306 | process->AppendSTDOUT (inferior_stdout.c_str(), inferior_stdout.size()); |
| 307 | } |
| 308 | break; |
| 309 | |
| 310 | case 'E': |
| 311 | // ERROR |
| 312 | state = eStateInvalid; |
| 313 | break; |
| 314 | |
| 315 | default: |
| 316 | if (log) |
| 317 | log->Printf ("GDBRemoteCommunication::%s () got unrecognized async packet: '%s'", __FUNCTION__, stop_type); |
| 318 | break; |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | else |
| 323 | { |
| 324 | if (log) |
| 325 | log->Printf ("GDBRemoteCommunication::%s () WaitForPacket(...) => false", __FUNCTION__); |
| 326 | state = eStateInvalid; |
| 327 | } |
| 328 | } |
| 329 | if (log) |
| 330 | log->Printf ("GDBRemoteCommunication::%s () => %s", __FUNCTION__, StateAsCString(state)); |
| 331 | response.SetFilePos(0); |
| 332 | m_is_running.SetValue (false, eBroadcastOnChange); |
| 333 | return state; |
| 334 | } |
| 335 | |
| 336 | size_t |
| 337 | GDBRemoteCommunication::SendPacket (const char *payload) |
| 338 | { |
| 339 | Mutex::Locker locker(m_sequence_mutex); |
| 340 | return SendPacketNoLock (payload, ::strlen (payload)); |
| 341 | } |
| 342 | |
| 343 | size_t |
| 344 | GDBRemoteCommunication::SendPacket (const char *payload, size_t payload_length) |
| 345 | { |
| 346 | Mutex::Locker locker(m_sequence_mutex); |
| 347 | return SendPacketNoLock (payload, payload_length); |
| 348 | } |
| 349 | |
| 350 | size_t |
| 351 | GDBRemoteCommunication::SendPacketNoLock (const char *payload, size_t payload_length) |
| 352 | { |
| 353 | if (IsConnected()) |
| 354 | { |
| 355 | StreamString packet(0, 4, eByteOrderBig); |
| 356 | |
| 357 | packet.PutChar('$'); |
| 358 | packet.Write (payload, payload_length); |
| 359 | packet.PutChar('#'); |
| 360 | packet.PutHex8(CalculcateChecksum (payload, payload_length)); |
| 361 | |
| 362 | ProcessGDBRemoteLog::LogIf (GDBR_LOG_PACKETS, "send packet: %s", packet.GetData()); |
| 363 | ConnectionStatus status = eConnectionStatusSuccess; |
| 364 | size_t bytes_written = Write (packet.GetData(), packet.GetSize(), status, NULL); |
| 365 | if (bytes_written == packet.GetSize()) |
| 366 | { |
| 367 | if (m_send_acks) |
Greg Clayton | 54e7afa | 2010-07-09 20:39:50 +0000 | [diff] [blame] | 368 | { |
| 369 | if (GetAck (1) != '+') |
| 370 | return 0; |
| 371 | } |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 372 | } |
| 373 | return bytes_written; |
| 374 | } |
| 375 | //m_error.SetErrorString("Not connected."); |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | char |
| 380 | GDBRemoteCommunication::GetAck (uint32_t timeout_seconds) |
| 381 | { |
| 382 | StringExtractorGDBRemote response; |
| 383 | if (WaitForPacket (response, timeout_seconds) == 1) |
| 384 | return response.GetChar(); |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | bool |
| 389 | GDBRemoteCommunication::GetSequenceMutex (Mutex::Locker& locker) |
| 390 | { |
| 391 | return locker.TryLock (m_sequence_mutex.GetMutex()); |
| 392 | } |
| 393 | |
| 394 | bool |
| 395 | GDBRemoteCommunication::SendAsyncSignal (int signo) |
| 396 | { |
| 397 | m_async_signal = signo; |
| 398 | bool timed_out = false; |
| 399 | if (SendInterrupt(1, &timed_out)) |
| 400 | return true; |
| 401 | m_async_signal = -1; |
| 402 | return false; |
| 403 | } |
| 404 | |
| 405 | bool |
| 406 | GDBRemoteCommunication::SendInterrupt (uint32_t seconds_to_wait_for_stop, bool *timed_out) |
| 407 | { |
| 408 | if (timed_out) |
| 409 | *timed_out = false; |
| 410 | |
| 411 | if (IsConnected() && IsRunning()) |
| 412 | { |
| 413 | // Only send an interrupt if our debugserver is running... |
| 414 | if (m_sequence_mutex.TryLock() != 0) |
| 415 | { |
| 416 | // Someone has the mutex locked waiting for a response or for the |
| 417 | // inferior to stop, so send the interrupt on the down low... |
| 418 | char ctrl_c = '\x03'; |
| 419 | ConnectionStatus status = eConnectionStatusSuccess; |
| 420 | TimeValue timeout; |
| 421 | if (seconds_to_wait_for_stop) |
| 422 | { |
| 423 | timeout = TimeValue::Now(); |
| 424 | timeout.OffsetWithSeconds (seconds_to_wait_for_stop); |
| 425 | } |
| 426 | ProcessGDBRemoteLog::LogIf (GDBR_LOG_PACKETS, "send packet: \\x03"); |
| 427 | if (Write (&ctrl_c, 1, status, NULL) > 0) |
| 428 | { |
| 429 | if (seconds_to_wait_for_stop) |
| 430 | m_is_running.WaitForValueEqualTo (false, &timeout, timed_out); |
| 431 | return true; |
| 432 | } |
| 433 | } |
| 434 | } |
| 435 | return false; |
| 436 | } |
| 437 | |
| 438 | size_t |
| 439 | GDBRemoteCommunication::WaitForPacket (StringExtractorGDBRemote &response, uint32_t timeout_seconds) |
| 440 | { |
| 441 | TimeValue timeout_time; |
| 442 | timeout_time = TimeValue::Now(); |
| 443 | timeout_time.OffsetWithSeconds (timeout_seconds); |
| 444 | return WaitForPacketNoLock (response, &timeout_time); |
| 445 | } |
| 446 | |
| 447 | size_t |
| 448 | GDBRemoteCommunication::WaitForPacket (StringExtractorGDBRemote &response, TimeValue* timeout_time_ptr) |
| 449 | { |
| 450 | Mutex::Locker locker(m_sequence_mutex); |
| 451 | return WaitForPacketNoLock (response, timeout_time_ptr); |
| 452 | } |
| 453 | |
| 454 | size_t |
| 455 | GDBRemoteCommunication::WaitForPacketNoLock (StringExtractorGDBRemote &response, TimeValue* timeout_time_ptr) |
| 456 | { |
| 457 | bool checksum_error = false; |
| 458 | response.Clear (); |
| 459 | |
| 460 | EventSP event_sp; |
| 461 | |
| 462 | if (m_rx_packet_listener.WaitForEvent (timeout_time_ptr, event_sp)) |
| 463 | { |
| 464 | const uint32_t event_type = event_sp->GetType(); |
| 465 | if (event_type | Communication::eBroadcastBitPacketAvailable) |
| 466 | { |
| 467 | const EventDataBytes *event_bytes = EventDataBytes::GetEventDataFromEvent(event_sp.get()); |
| 468 | if (event_bytes) |
| 469 | { |
| 470 | const char * packet_data = (const char *)event_bytes->GetBytes(); |
| 471 | ProcessGDBRemoteLog::LogIf (GDBR_LOG_PACKETS, "read packet: %s", packet_data); |
| 472 | const size_t packet_size = event_bytes->GetByteSize(); |
| 473 | if (packet_data && packet_size > 0) |
| 474 | { |
| 475 | std::string &response_str = response.GetStringRef(); |
| 476 | if (packet_data[0] == '$') |
| 477 | { |
| 478 | assert (packet_size >= 4); // Must have at least '$#CC' where CC is checksum |
| 479 | assert (packet_data[packet_size-3] == '#'); |
| 480 | assert (::isxdigit (packet_data[packet_size-2])); // Must be checksum hex byte |
| 481 | assert (::isxdigit (packet_data[packet_size-1])); // Must be checksum hex byte |
| 482 | response_str.assign (packet_data + 1, packet_size - 4); |
| 483 | if (m_send_acks) |
| 484 | { |
| 485 | char packet_checksum = strtol (&packet_data[packet_size-2], NULL, 16); |
Greg Clayton | 53d68e7 | 2010-07-20 22:52:08 +0000 | [diff] [blame] | 486 | char actual_checksum = CalculcateChecksum (&response_str[0], response_str.size()); |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 487 | checksum_error = packet_checksum != actual_checksum; |
| 488 | // Send the ack or nack if needed |
| 489 | if (checksum_error) |
| 490 | SendAck('-'); |
| 491 | else |
| 492 | SendAck('+'); |
| 493 | } |
| 494 | } |
| 495 | else |
| 496 | { |
| 497 | response_str.assign (packet_data, packet_size); |
| 498 | } |
| 499 | return response_str.size(); |
| 500 | } |
| 501 | } |
| 502 | } |
| 503 | else if (Communication::eBroadcastBitReadThreadDidExit) |
| 504 | { |
| 505 | // Our read thread exited on us so just fall through and return zero... |
| 506 | } |
| 507 | } |
| 508 | return 0; |
| 509 | } |
| 510 | |
| 511 | void |
| 512 | GDBRemoteCommunication::AppendBytesToCache (const uint8_t *src, size_t src_len, bool broadcast) |
| 513 | { |
| 514 | // Put the packet data into the buffer in a thread safe fashion |
| 515 | Mutex::Locker locker(m_bytes_mutex); |
| 516 | m_bytes.append ((const char *)src, src_len); |
| 517 | |
| 518 | // Parse up the packets into gdb remote packets |
| 519 | while (!m_bytes.empty()) |
| 520 | { |
| 521 | // end_idx must be one past the last valid packet byte. Start |
| 522 | // it off with an invalid value that is the same as the current |
| 523 | // index. |
| 524 | size_t end_idx = 0; |
| 525 | |
| 526 | switch (m_bytes[0]) |
| 527 | { |
| 528 | case '+': // Look for ack |
| 529 | case '-': // Look for cancel |
| 530 | case '\x03': // ^C to halt target |
| 531 | end_idx = 1; // The command is one byte long... |
| 532 | break; |
| 533 | |
| 534 | case '$': |
| 535 | // Look for a standard gdb packet? |
| 536 | end_idx = m_bytes.find('#'); |
| 537 | if (end_idx != std::string::npos) |
| 538 | { |
| 539 | if (end_idx + 2 < m_bytes.size()) |
| 540 | { |
| 541 | end_idx += 3; |
| 542 | } |
| 543 | else |
| 544 | { |
| 545 | // Checksum bytes aren't all here yet |
| 546 | end_idx = std::string::npos; |
| 547 | } |
| 548 | } |
| 549 | break; |
| 550 | |
| 551 | default: |
| 552 | break; |
| 553 | } |
| 554 | |
| 555 | if (end_idx == std::string::npos) |
| 556 | { |
| 557 | //ProcessGDBRemoteLog::LogIf (GDBR_LOG_PACKETS | GDBR_LOG_VERBOSE, "GDBRemoteCommunication::%s packet not yet complete: '%s'",__FUNCTION__, m_bytes.c_str()); |
| 558 | return; |
| 559 | } |
| 560 | else if (end_idx > 0) |
| 561 | { |
| 562 | // We have a valid packet... |
| 563 | assert (end_idx <= m_bytes.size()); |
| 564 | std::auto_ptr<EventDataBytes> event_bytes_ap (new EventDataBytes (&m_bytes[0], end_idx)); |
| 565 | ProcessGDBRemoteLog::LogIf (GDBR_LOG_COMM, "got full packet: %s", event_bytes_ap->GetBytes()); |
| 566 | BroadcastEvent (eBroadcastBitPacketAvailable, event_bytes_ap.release()); |
| 567 | m_bytes.erase(0, end_idx); |
| 568 | } |
| 569 | else |
| 570 | { |
| 571 | assert (1 <= m_bytes.size()); |
| 572 | ProcessGDBRemoteLog::LogIf (GDBR_LOG_COMM, "GDBRemoteCommunication::%s tossing junk byte at %c",__FUNCTION__, m_bytes[0]); |
| 573 | m_bytes.erase(0, 1); |
| 574 | } |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | lldb::pid_t |
| 579 | GDBRemoteCommunication::GetCurrentProcessID (uint32_t timeout_seconds) |
| 580 | { |
| 581 | StringExtractorGDBRemote response; |
| 582 | if (SendPacketAndWaitForResponse("qC", strlen("qC"), response, timeout_seconds, false)) |
| 583 | { |
| 584 | if (response.GetChar() == 'Q') |
| 585 | if (response.GetChar() == 'C') |
| 586 | return response.GetHexMaxU32 (false, LLDB_INVALID_PROCESS_ID); |
| 587 | } |
| 588 | return LLDB_INVALID_PROCESS_ID; |
| 589 | } |
| 590 | |
| 591 | bool |
| 592 | GDBRemoteCommunication::GetLaunchSuccess (uint32_t timeout_seconds, std::string &error_str) |
| 593 | { |
| 594 | error_str.clear(); |
| 595 | StringExtractorGDBRemote response; |
| 596 | if (SendPacketAndWaitForResponse("qLaunchSuccess", strlen("qLaunchSuccess"), response, timeout_seconds, false)) |
| 597 | { |
| 598 | if (response.IsOKPacket()) |
| 599 | return true; |
| 600 | if (response.GetChar() == 'E') |
| 601 | { |
| 602 | // A string the describes what failed when launching... |
| 603 | error_str = response.GetStringRef().substr(1); |
| 604 | } |
| 605 | else |
| 606 | { |
| 607 | error_str.assign ("unknown error occurred launching process"); |
| 608 | } |
| 609 | } |
| 610 | else |
| 611 | { |
| 612 | error_str.assign ("failed to send the qLaunchSuccess packet"); |
| 613 | } |
| 614 | return false; |
| 615 | } |
| 616 | |
| 617 | int |
| 618 | GDBRemoteCommunication::SendArgumentsPacket (char const *argv[], uint32_t timeout_seconds) |
| 619 | { |
| 620 | if (argv && argv[0]) |
| 621 | { |
| 622 | StreamString packet; |
| 623 | packet.PutChar('A'); |
| 624 | const char *arg; |
| 625 | for (uint32_t i = 0; (arg = argv[i]) != NULL; ++i) |
| 626 | { |
| 627 | const int arg_len = strlen(arg); |
| 628 | if (i > 0) |
| 629 | packet.PutChar(','); |
| 630 | packet.Printf("%i,%i,", arg_len * 2, i); |
| 631 | packet.PutBytesAsRawHex8(arg, arg_len, eByteOrderHost, eByteOrderHost); |
| 632 | } |
| 633 | |
| 634 | StringExtractorGDBRemote response; |
| 635 | if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, timeout_seconds, false)) |
| 636 | { |
| 637 | if (response.IsOKPacket()) |
| 638 | return 0; |
| 639 | uint8_t error = response.GetError(); |
| 640 | if (error) |
| 641 | return error; |
| 642 | } |
| 643 | } |
| 644 | return -1; |
| 645 | } |
| 646 | |
| 647 | int |
| 648 | GDBRemoteCommunication::SendEnvironmentPacket (char const *name_equal_value, uint32_t timeout_seconds) |
| 649 | { |
| 650 | if (name_equal_value && name_equal_value[0]) |
| 651 | { |
| 652 | StreamString packet; |
| 653 | packet.Printf("QEnvironment:%s", name_equal_value); |
| 654 | StringExtractorGDBRemote response; |
| 655 | if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, timeout_seconds, false)) |
| 656 | { |
| 657 | if (response.IsOKPacket()) |
| 658 | return 0; |
| 659 | uint8_t error = response.GetError(); |
| 660 | if (error) |
| 661 | return error; |
| 662 | } |
| 663 | } |
| 664 | return -1; |
| 665 | } |
| 666 | |
| 667 | bool |
| 668 | GDBRemoteCommunication::GetHostInfo (uint32_t timeout_seconds) |
| 669 | { |
| 670 | m_arch.Clear(); |
| 671 | m_os.Clear(); |
| 672 | m_vendor.Clear(); |
| 673 | m_byte_order = eByteOrderHost; |
| 674 | m_pointer_byte_size = 0; |
| 675 | |
| 676 | StringExtractorGDBRemote response; |
| 677 | if (SendPacketAndWaitForResponse ("qHostInfo", response, timeout_seconds, false)) |
| 678 | { |
| 679 | if (response.IsUnsupportedPacket()) |
| 680 | return false; |
| 681 | |
| 682 | |
| 683 | std::string name; |
| 684 | std::string value; |
| 685 | while (response.GetNameColonValue(name, value)) |
| 686 | { |
| 687 | if (name.compare("cputype") == 0) |
| 688 | { |
| 689 | // exception type in big endian hex |
| 690 | m_arch.SetCPUType(Args::StringToUInt32 (value.c_str(), LLDB_INVALID_CPUTYPE, 0)); |
| 691 | } |
| 692 | else if (name.compare("cpusubtype") == 0) |
| 693 | { |
| 694 | // exception count in big endian hex |
| 695 | m_arch.SetCPUSubtype(Args::StringToUInt32 (value.c_str(), 0, 0)); |
| 696 | } |
| 697 | else if (name.compare("ostype") == 0) |
| 698 | { |
| 699 | // exception data in big endian hex |
| 700 | m_os.SetCString(value.c_str()); |
| 701 | } |
| 702 | else if (name.compare("vendor") == 0) |
| 703 | { |
| 704 | m_vendor.SetCString(value.c_str()); |
| 705 | } |
| 706 | else if (name.compare("endian") == 0) |
| 707 | { |
| 708 | if (value.compare("little") == 0) |
| 709 | m_byte_order = eByteOrderLittle; |
| 710 | else if (value.compare("big") == 0) |
| 711 | m_byte_order = eByteOrderBig; |
| 712 | else if (value.compare("pdp") == 0) |
| 713 | m_byte_order = eByteOrderPDP; |
| 714 | } |
| 715 | else if (name.compare("ptrsize") == 0) |
| 716 | { |
| 717 | m_pointer_byte_size = Args::StringToUInt32 (value.c_str(), 0, 0); |
| 718 | } |
| 719 | } |
| 720 | } |
| 721 | return HostInfoIsValid(); |
| 722 | } |
| 723 | |
| 724 | int |
| 725 | GDBRemoteCommunication::SendAttach |
| 726 | ( |
| 727 | lldb::pid_t pid, |
| 728 | uint32_t timeout_seconds, |
| 729 | StringExtractorGDBRemote& response |
| 730 | ) |
| 731 | { |
| 732 | if (pid != LLDB_INVALID_PROCESS_ID) |
| 733 | { |
| 734 | StreamString packet; |
| 735 | packet.Printf("vAttach;%x", pid); |
| 736 | |
| 737 | if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, timeout_seconds, false)) |
| 738 | { |
| 739 | if (response.IsErrorPacket()) |
| 740 | return response.GetError(); |
| 741 | return 0; |
| 742 | } |
| 743 | } |
| 744 | return -1; |
| 745 | } |
| 746 | |
| 747 | const lldb_private::ArchSpec & |
| 748 | GDBRemoteCommunication::GetHostArchitecture () |
| 749 | { |
| 750 | if (!HostInfoIsValid ()) |
| 751 | GetHostInfo (1); |
| 752 | return m_arch; |
| 753 | } |
| 754 | |
| 755 | const lldb_private::ConstString & |
| 756 | GDBRemoteCommunication::GetOSString () |
| 757 | { |
| 758 | if (!HostInfoIsValid ()) |
| 759 | GetHostInfo (1); |
| 760 | return m_os; |
| 761 | } |
| 762 | |
| 763 | const lldb_private::ConstString & |
| 764 | GDBRemoteCommunication::GetVendorString() |
| 765 | { |
| 766 | if (!HostInfoIsValid ()) |
| 767 | GetHostInfo (1); |
| 768 | return m_vendor; |
| 769 | } |
| 770 | |
| 771 | lldb::ByteOrder |
| 772 | GDBRemoteCommunication::GetByteOrder () |
| 773 | { |
| 774 | if (!HostInfoIsValid ()) |
| 775 | GetHostInfo (1); |
| 776 | return m_byte_order; |
| 777 | } |
| 778 | |
| 779 | uint32_t |
| 780 | GDBRemoteCommunication::GetAddressByteSize () |
| 781 | { |
| 782 | if (!HostInfoIsValid ()) |
| 783 | GetHostInfo (1); |
| 784 | return m_pointer_byte_size; |
| 785 | } |
| 786 | |
| 787 | addr_t |
| 788 | GDBRemoteCommunication::AllocateMemory (size_t size, uint32_t permissions, uint32_t timeout_seconds) |
| 789 | { |
| 790 | char packet[64]; |
| 791 | ::snprintf (packet, sizeof(packet), "_M%zx,%s%s%s", size, |
| 792 | permissions & lldb::ePermissionsReadable ? "r" : "", |
| 793 | permissions & lldb::ePermissionsWritable ? "w" : "", |
| 794 | permissions & lldb::ePermissionsExecutable ? "x" : ""); |
| 795 | StringExtractorGDBRemote response; |
| 796 | if (SendPacketAndWaitForResponse (packet, response, timeout_seconds, false)) |
| 797 | { |
| 798 | if (!response.IsErrorPacket()) |
| 799 | return response.GetHexMaxU64(false, LLDB_INVALID_ADDRESS); |
| 800 | } |
| 801 | return LLDB_INVALID_ADDRESS; |
| 802 | } |
| 803 | |
| 804 | bool |
| 805 | GDBRemoteCommunication::DeallocateMemory (addr_t addr, uint32_t timeout_seconds) |
| 806 | { |
| 807 | char packet[64]; |
| 808 | snprintf(packet, sizeof(packet), "_m%llx", (uint64_t)addr); |
| 809 | StringExtractorGDBRemote response; |
| 810 | if (SendPacketAndWaitForResponse (packet, response, timeout_seconds, false)) |
| 811 | { |
| 812 | if (!response.IsOKPacket()) |
| 813 | return true; |
| 814 | } |
| 815 | return false; |
| 816 | } |