1 //===-- ScriptInterpreterPython.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 // In order to guarantee correct working with Python, Python.h *MUST* be 11 // the *FIRST* header file included here. 12 #ifdef LLDB_DISABLE_PYTHON 13 14 // Python is disabled in this build 15 16 #else 17 18 #if defined (__APPLE__) 19 #include <Python/Python.h> 20 #else 21 #include <Python.h> 22 #endif 23 24 #include "lldb/Interpreter/ScriptInterpreterPython.h" 25 26 #include <stdlib.h> 27 #include <stdio.h> 28 29 #include <string> 30 31 #include "lldb/API/SBValue.h" 32 #include "lldb/Breakpoint/BreakpointLocation.h" 33 #include "lldb/Breakpoint/StoppointCallbackContext.h" 34 #include "lldb/Breakpoint/WatchpointOptions.h" 35 #include "lldb/Core/Debugger.h" 36 #include "lldb/Core/Timer.h" 37 #include "lldb/Host/Host.h" 38 #include "lldb/Interpreter/CommandInterpreter.h" 39 #include "lldb/Interpreter/CommandReturnObject.h" 40 #include "lldb/Target/Thread.h" 41 42 using namespace lldb; 43 using namespace lldb_private; 44 45 46 static ScriptInterpreter::SWIGInitCallback g_swig_init_callback = NULL; 47 static ScriptInterpreter::SWIGBreakpointCallbackFunction g_swig_breakpoint_callback = NULL; 48 static ScriptInterpreter::SWIGWatchpointCallbackFunction g_swig_watchpoint_callback = NULL; 49 static ScriptInterpreter::SWIGPythonTypeScriptCallbackFunction g_swig_typescript_callback = NULL; 50 static ScriptInterpreter::SWIGPythonCreateSyntheticProvider g_swig_synthetic_script = NULL; 51 static ScriptInterpreter::SWIGPythonCalculateNumChildren g_swig_calc_children = NULL; 52 static ScriptInterpreter::SWIGPythonGetChildAtIndex g_swig_get_child_index = NULL; 53 static ScriptInterpreter::SWIGPythonGetIndexOfChildWithName g_swig_get_index_child = NULL; 54 static ScriptInterpreter::SWIGPythonCastPyObjectToSBValue g_swig_cast_to_sbvalue = NULL; 55 static ScriptInterpreter::SWIGPythonUpdateSynthProviderInstance g_swig_update_provider = NULL; 56 static ScriptInterpreter::SWIGPythonMightHaveChildrenSynthProviderInstance g_swig_mighthavechildren_provider = NULL; 57 static ScriptInterpreter::SWIGPythonCallCommand g_swig_call_command = NULL; 58 static ScriptInterpreter::SWIGPythonCallModuleInit g_swig_call_module_init = NULL; 59 static ScriptInterpreter::SWIGPythonCreateOSPlugin g_swig_create_os_plugin = NULL; 60 static ScriptInterpreter::SWIGPythonScriptKeyword_Process g_swig_run_script_keyword_process = NULL; 61 static ScriptInterpreter::SWIGPythonScriptKeyword_Thread g_swig_run_script_keyword_thread = NULL; 62 static ScriptInterpreter::SWIGPythonScriptKeyword_Target g_swig_run_script_keyword_target = NULL; 63 static ScriptInterpreter::SWIGPythonScriptKeyword_Frame g_swig_run_script_keyword_frame = NULL; 64 65 // these are the Pythonic implementations of the required callbacks 66 // these are scripting-language specific, which is why they belong here 67 // we still need to use function pointers to them instead of relying 68 // on linkage-time resolution because the SWIG stuff and this file 69 // get built at different times 70 extern "C" bool 71 LLDBSwigPythonBreakpointCallbackFunction (const char *python_function_name, 72 const char *session_dictionary_name, 73 const lldb::StackFrameSP& sb_frame, 74 const lldb::BreakpointLocationSP& sb_bp_loc); 75 76 extern "C" bool 77 LLDBSwigPythonWatchpointCallbackFunction (const char *python_function_name, 78 const char *session_dictionary_name, 79 const lldb::StackFrameSP& sb_frame, 80 const lldb::WatchpointSP& sb_wp); 81 82 extern "C" bool 83 LLDBSwigPythonCallTypeScript (const char *python_function_name, 84 void *session_dictionary, 85 const lldb::ValueObjectSP& valobj_sp, 86 void** pyfunct_wrapper, 87 std::string& retval); 88 89 extern "C" void* 90 LLDBSwigPythonCreateSyntheticProvider (const char *python_class_name, 91 const char *session_dictionary_name, 92 const lldb::ValueObjectSP& valobj_sp); 93 94 95 extern "C" uint32_t 96 LLDBSwigPython_CalculateNumChildren (void *implementor); 97 98 extern "C" void * 99 LLDBSwigPython_GetChildAtIndex (void *implementor, uint32_t idx); 100 101 extern "C" int 102 LLDBSwigPython_GetIndexOfChildWithName (void *implementor, const char* child_name); 103 104 extern "C" void * 105 LLDBSWIGPython_CastPyObjectToSBValue (void* data); 106 107 extern "C" bool 108 LLDBSwigPython_UpdateSynthProviderInstance (void* implementor); 109 110 extern "C" bool 111 LLDBSwigPython_MightHaveChildrenSynthProviderInstance (void* implementor); 112 113 extern "C" bool 114 LLDBSwigPythonCallCommand (const char *python_function_name, 115 const char *session_dictionary_name, 116 lldb::DebuggerSP& debugger, 117 const char* args, 118 lldb_private::CommandReturnObject &cmd_retobj); 119 120 extern "C" bool 121 LLDBSwigPythonCallModuleInit (const char *python_module_name, 122 const char *session_dictionary_name, 123 lldb::DebuggerSP& debugger); 124 125 extern "C" void* 126 LLDBSWIGPythonCreateOSPlugin (const char *python_class_name, 127 const char *session_dictionary_name, 128 const lldb::ProcessSP& process_sp); 129 130 extern "C" bool 131 LLDBSWIGPythonRunScriptKeywordProcess (const char* python_function_name, 132 const char* session_dictionary_name, 133 lldb::ProcessSP& process, 134 std::string& output); 135 136 extern "C" bool 137 LLDBSWIGPythonRunScriptKeywordThread (const char* python_function_name, 138 const char* session_dictionary_name, 139 lldb::ThreadSP& thread, 140 std::string& output); 141 142 extern "C" bool 143 LLDBSWIGPythonRunScriptKeywordTarget (const char* python_function_name, 144 const char* session_dictionary_name, 145 lldb::TargetSP& target, 146 std::string& output); 147 148 extern "C" bool 149 LLDBSWIGPythonRunScriptKeywordFrame (const char* python_function_name, 150 const char* session_dictionary_name, 151 lldb::StackFrameSP& frame, 152 std::string& output); 153 154 static int 155 _check_and_flush (FILE *stream) 156 { 157 int prev_fail = ferror (stream); 158 return fflush (stream) || prev_fail ? EOF : 0; 159 } 160 161 ScriptInterpreterPython::Locker::Locker (ScriptInterpreterPython *py_interpreter, 162 uint16_t on_entry, 163 uint16_t on_leave, 164 FILE* wait_msg_handle) : 165 ScriptInterpreterLocker (), 166 m_teardown_session( (on_leave & TearDownSession) == TearDownSession ), 167 m_python_interpreter(py_interpreter), 168 m_tmp_fh(wait_msg_handle) 169 { 170 if (m_python_interpreter && !m_tmp_fh) 171 m_tmp_fh = (m_python_interpreter->m_dbg_stdout ? m_python_interpreter->m_dbg_stdout : stdout); 172 173 DoAcquireLock(); 174 if ((on_entry & InitSession) == InitSession) 175 { 176 if (DoInitSession((on_entry & InitGlobals) == InitGlobals) == false) 177 { 178 // Don't teardown the session if we didn't init it. 179 m_teardown_session = false; 180 } 181 } 182 } 183 184 bool 185 ScriptInterpreterPython::Locker::DoAcquireLock() 186 { 187 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SCRIPT | LIBLLDB_LOG_VERBOSE)); 188 m_GILState = PyGILState_Ensure(); 189 if (log) 190 log->Printf("Ensured PyGILState. Previous state = %slocked\n", m_GILState == PyGILState_UNLOCKED ? "un" : ""); 191 return true; 192 } 193 194 bool 195 ScriptInterpreterPython::Locker::DoInitSession(bool init_lldb_globals) 196 { 197 if (!m_python_interpreter) 198 return false; 199 return m_python_interpreter->EnterSession (init_lldb_globals); 200 } 201 202 bool 203 ScriptInterpreterPython::Locker::DoFreeLock() 204 { 205 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SCRIPT | LIBLLDB_LOG_VERBOSE)); 206 if (log) 207 log->Printf("Releasing PyGILState. Returning to state = %slocked\n", m_GILState == PyGILState_UNLOCKED ? "un" : ""); 208 PyGILState_Release(m_GILState); 209 return true; 210 } 211 212 bool 213 ScriptInterpreterPython::Locker::DoTearDownSession() 214 { 215 if (!m_python_interpreter) 216 return false; 217 m_python_interpreter->LeaveSession (); 218 return true; 219 } 220 221 ScriptInterpreterPython::Locker::~Locker() 222 { 223 if (m_teardown_session) 224 DoTearDownSession(); 225 DoFreeLock(); 226 } 227 228 ScriptInterpreterPython::PythonInputReaderManager::PythonInputReaderManager (ScriptInterpreterPython *interpreter) : 229 m_interpreter(interpreter), 230 m_debugger_sp(), 231 m_reader_sp(), 232 m_error(false) 233 { 234 if (m_interpreter == NULL) 235 { 236 m_error = true; 237 return; 238 } 239 240 m_debugger_sp = m_interpreter->GetCommandInterpreter().GetDebugger().shared_from_this(); 241 242 if (!m_debugger_sp) 243 { 244 m_error = true; 245 return; 246 } 247 248 m_reader_sp = InputReaderSP(new InputReader(*m_debugger_sp.get())); 249 250 if (!m_reader_sp) 251 { 252 m_error = true; 253 return; 254 } 255 256 Error error (m_reader_sp->Initialize (ScriptInterpreterPython::PythonInputReaderManager::InputReaderCallback, 257 m_interpreter, // baton 258 eInputReaderGranularityLine, // token size, to pass to callback function 259 NULL, // end token 260 NULL, // prompt 261 true)); // echo input 262 if (error.Fail()) 263 m_error = true; 264 else 265 { 266 m_debugger_sp->PushInputReader (m_reader_sp); 267 m_interpreter->m_embedded_thread_input_reader_sp = m_reader_sp; 268 } 269 } 270 271 ScriptInterpreterPython::PythonInputReaderManager::~PythonInputReaderManager() 272 { 273 // Nothing to do if either m_interpreter or m_reader_sp is invalid. 274 if (!m_interpreter || !m_reader_sp) 275 return; 276 277 m_reader_sp->SetIsDone (true); 278 if (m_debugger_sp) 279 m_debugger_sp->PopInputReader(m_reader_sp); 280 281 // Only mess with m_interpreter's counterpart if, indeed, they are the same object. 282 if (m_reader_sp.get() == m_interpreter->m_embedded_thread_input_reader_sp.get()) 283 { 284 m_interpreter->m_embedded_thread_pty.CloseSlaveFileDescriptor(); 285 m_interpreter->m_embedded_thread_input_reader_sp.reset(); 286 } 287 } 288 289 size_t 290 ScriptInterpreterPython::PythonInputReaderManager::InputReaderCallback (void *baton, 291 InputReader &reader, 292 InputReaderAction notification, 293 const char *bytes, 294 size_t bytes_len) 295 { 296 lldb::thread_t embedded_interpreter_thread; 297 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SCRIPT)); 298 299 if (baton == NULL) 300 return 0; 301 302 ScriptInterpreterPython *script_interpreter = (ScriptInterpreterPython *) baton; 303 304 if (script_interpreter->m_script_lang != eScriptLanguagePython) 305 return 0; 306 307 switch (notification) 308 { 309 case eInputReaderActivate: 310 { 311 // Save terminal settings if we can 312 int input_fd = reader.GetDebugger().GetInputFile().GetDescriptor(); 313 if (input_fd == File::kInvalidDescriptor) 314 input_fd = STDIN_FILENO; 315 316 script_interpreter->SaveTerminalState(input_fd); 317 318 char error_str[1024]; 319 if (script_interpreter->m_embedded_thread_pty.OpenFirstAvailableMaster (O_RDWR|O_NOCTTY, error_str, 320 sizeof(error_str))) 321 { 322 if (log) 323 log->Printf ("ScriptInterpreterPython::NonInteractiveInputReaderCallback, Activate, succeeded in opening master pty (fd = %d).", 324 script_interpreter->m_embedded_thread_pty.GetMasterFileDescriptor()); 325 { 326 StreamString run_string; 327 char error_str[1024]; 328 const char *pty_slave_name = script_interpreter->m_embedded_thread_pty.GetSlaveName (error_str, sizeof (error_str)); 329 if (pty_slave_name != NULL && PyThreadState_GetDict() != NULL) 330 { 331 ScriptInterpreterPython::Locker locker(script_interpreter, 332 ScriptInterpreterPython::Locker::AcquireLock | ScriptInterpreterPython::Locker::InitSession | ScriptInterpreterPython::Locker::InitGlobals, 333 ScriptInterpreterPython::Locker::FreeAcquiredLock); 334 run_string.Printf ("run_one_line (%s, 'save_stderr = sys.stderr')", script_interpreter->m_dictionary_name.c_str()); 335 PyRun_SimpleString (run_string.GetData()); 336 run_string.Clear (); 337 338 run_string.Printf ("run_one_line (%s, 'sys.stderr = sys.stdout')", script_interpreter->m_dictionary_name.c_str()); 339 PyRun_SimpleString (run_string.GetData()); 340 run_string.Clear (); 341 342 run_string.Printf ("run_one_line (%s, 'save_stdin = sys.stdin')", script_interpreter->m_dictionary_name.c_str()); 343 PyRun_SimpleString (run_string.GetData()); 344 run_string.Clear (); 345 346 run_string.Printf ("run_one_line (%s, \"sys.stdin = open ('%s', 'r')\")", script_interpreter->m_dictionary_name.c_str(), 347 pty_slave_name); 348 PyRun_SimpleString (run_string.GetData()); 349 run_string.Clear (); 350 } 351 } 352 embedded_interpreter_thread = Host::ThreadCreate ("<lldb.script-interpreter.noninteractive-python>", 353 ScriptInterpreterPython::PythonInputReaderManager::RunPythonInputReader, 354 script_interpreter, NULL); 355 if (IS_VALID_LLDB_HOST_THREAD(embedded_interpreter_thread)) 356 { 357 if (log) 358 log->Printf ("ScriptInterpreterPython::NonInteractiveInputReaderCallback, Activate, succeeded in creating thread (thread_t = %p)", (void *)embedded_interpreter_thread); 359 Error detach_error; 360 Host::ThreadDetach (embedded_interpreter_thread, &detach_error); 361 } 362 else 363 { 364 if (log) 365 log->Printf ("ScriptInterpreterPython::NonInteractiveInputReaderCallback, Activate, failed in creating thread"); 366 reader.SetIsDone (true); 367 } 368 } 369 else 370 { 371 if (log) 372 log->Printf ("ScriptInterpreterPython::NonInteractiveInputReaderCallback, Activate, failed to open master pty "); 373 reader.SetIsDone (true); 374 } 375 } 376 break; 377 378 case eInputReaderDeactivate: 379 // When another input reader is pushed, don't leave the session... 380 //script_interpreter->LeaveSession (); 381 break; 382 383 case eInputReaderReactivate: 384 // { 385 // ScriptInterpreterPython::Locker locker(script_interpreter, 386 // ScriptInterpreterPython::Locker::AcquireLock | ScriptInterpreterPython::Locker::InitSession, 387 // ScriptInterpreterPython::Locker::FreeAcquiredLock); 388 // } 389 break; 390 391 case eInputReaderAsynchronousOutputWritten: 392 break; 393 394 case eInputReaderInterrupt: 395 { 396 PyThreadState* state = _PyThreadState_Current; 397 if (!state) 398 state = script_interpreter->m_command_thread_state; 399 if (state) 400 { 401 long tid = state->thread_id; 402 _PyThreadState_Current = state; 403 int num_threads = PyThreadState_SetAsyncExc(tid, PyExc_KeyboardInterrupt); 404 if (log) 405 log->Printf("ScriptInterpreterPython::NonInteractiveInputReaderCallback, eInputReaderInterrupt, tid = %ld, num_threads = %d, state = %p", 406 tid,num_threads,state); 407 } 408 else if (log) 409 log->Printf("ScriptInterpreterPython::NonInteractiveInputReaderCallback, eInputReaderInterrupt, state = NULL"); 410 } 411 break; 412 413 case eInputReaderEndOfFile: 414 reader.SetIsDone(true); 415 break; 416 417 case eInputReaderGotToken: 418 if (script_interpreter->m_embedded_thread_pty.GetMasterFileDescriptor() != -1) 419 { 420 if (log) 421 log->Printf ("ScriptInterpreterPython::NonInteractiveInputReaderCallback, GotToken, bytes='%s', byte_len = %lu", bytes, 422 bytes_len); 423 if (bytes && bytes_len) 424 ::write (script_interpreter->m_embedded_thread_pty.GetMasterFileDescriptor(), bytes, bytes_len); 425 ::write (script_interpreter->m_embedded_thread_pty.GetMasterFileDescriptor(), "\n", 1); 426 } 427 else 428 { 429 if (log) 430 log->Printf ("ScriptInterpreterPython::NonInteractiveInputReaderCallback, GotToken, bytes='%s', byte_len = %lu, Master File Descriptor is bad.", 431 bytes, 432 bytes_len); 433 reader.SetIsDone (true); 434 } 435 break; 436 437 case eInputReaderDone: 438 { 439 StreamString run_string; 440 char error_str[1024]; 441 const char *pty_slave_name = script_interpreter->m_embedded_thread_pty.GetSlaveName (error_str, sizeof (error_str)); 442 if (pty_slave_name != NULL && PyThreadState_GetDict() != NULL) 443 { 444 ScriptInterpreterPython::Locker locker(script_interpreter, 445 ScriptInterpreterPython::Locker::AcquireLock, 446 ScriptInterpreterPython::Locker::FreeAcquiredLock); 447 run_string.Printf ("run_one_line (%s, 'sys.stdin = save_stdin; sys.stderr = save_stderr')", script_interpreter->m_dictionary_name.c_str()); 448 PyRun_SimpleString (run_string.GetData()); 449 run_string.Clear(); 450 } 451 // Restore terminal settings if they were validly saved 452 if (log) 453 log->Printf ("ScriptInterpreterPython::NonInteractiveInputReaderCallback, Done, closing down input reader."); 454 455 script_interpreter->RestoreTerminalState (); 456 457 script_interpreter->m_embedded_thread_pty.CloseMasterFileDescriptor(); 458 } 459 break; 460 } 461 462 return bytes_len; 463 } 464 465 ScriptInterpreterPython::ScriptInterpreterPython (CommandInterpreter &interpreter) : 466 ScriptInterpreter (interpreter, eScriptLanguagePython), 467 m_embedded_thread_pty (), 468 m_embedded_python_pty (), 469 m_embedded_thread_input_reader_sp (), 470 m_embedded_python_input_reader_sp (), 471 m_dbg_stdout (interpreter.GetDebugger().GetOutputFile().GetStream()), 472 m_new_sysout (NULL), 473 m_old_sysout (NULL), 474 m_old_syserr (NULL), 475 m_run_one_line (NULL), 476 m_dictionary_name (interpreter.GetDebugger().GetInstanceName().AsCString()), 477 m_terminal_state (), 478 m_session_is_active (false), 479 m_valid_session (true), 480 m_command_thread_state (NULL) 481 { 482 483 static int g_initialized = false; 484 485 if (!g_initialized) 486 { 487 g_initialized = true; 488 ScriptInterpreterPython::InitializePrivate (); 489 } 490 491 m_dictionary_name.append("_dict"); 492 StreamString run_string; 493 run_string.Printf ("%s = dict()", m_dictionary_name.c_str()); 494 495 Locker locker(this, 496 ScriptInterpreterPython::Locker::AcquireLock, 497 ScriptInterpreterPython::Locker::FreeAcquiredLock); 498 PyRun_SimpleString (run_string.GetData()); 499 500 run_string.Clear(); 501 502 // Importing 'lldb' module calls SBDebugger::Initialize, which calls Debugger::Initialize, which increments a 503 // global debugger ref-count; therefore we need to check the ref-count before and after importing lldb, and if the 504 // ref-count increased we need to call Debugger::Terminate here to decrement the ref-count so that when the final 505 // call to Debugger::Terminate is made, the ref-count has the correct value. 506 // 507 // Bonus question: Why doesn't the ref-count always increase? Because sometimes lldb has already been imported, in 508 // which case the code inside it, including the call to SBDebugger::Initialize(), does not get executed. 509 510 int old_count = Debugger::TestDebuggerRefCount(); 511 512 run_string.Printf ("run_one_line (%s, 'import copy, os, re, sys, uuid, lldb')", m_dictionary_name.c_str()); 513 PyRun_SimpleString (run_string.GetData()); 514 515 // WARNING: temporary code that loads Cocoa formatters - this should be done on a per-platform basis rather than loading the whole set 516 // and letting the individual formatter classes exploit APIs to check whether they can/cannot do their task 517 run_string.Clear(); 518 run_string.Printf ("run_one_line (%s, 'import lldb.formatters, lldb.formatters.cpp, pydoc')", m_dictionary_name.c_str()); 519 PyRun_SimpleString (run_string.GetData()); 520 521 int new_count = Debugger::TestDebuggerRefCount(); 522 523 if (new_count > old_count) 524 Debugger::Terminate(); 525 526 run_string.Clear(); 527 run_string.Printf ("run_one_line (%s, 'lldb.debugger_unique_id = %" PRIu64 "; pydoc.pager = pydoc.plainpager')", m_dictionary_name.c_str(), 528 interpreter.GetDebugger().GetID()); 529 PyRun_SimpleString (run_string.GetData()); 530 531 if (m_dbg_stdout != NULL) 532 { 533 m_new_sysout = PyFile_FromFile (m_dbg_stdout, (char *) "", (char *) "w", _check_and_flush); 534 } 535 536 // get the output file handle from the debugger (if any) 537 File& out_file = interpreter.GetDebugger().GetOutputFile(); 538 if (out_file.IsValid()) 539 ResetOutputFileHandle(out_file.GetStream()); 540 } 541 542 ScriptInterpreterPython::~ScriptInterpreterPython () 543 { 544 Debugger &debugger = GetCommandInterpreter().GetDebugger(); 545 546 if (m_embedded_thread_input_reader_sp.get() != NULL) 547 { 548 m_embedded_thread_input_reader_sp->SetIsDone (true); 549 m_embedded_thread_pty.CloseSlaveFileDescriptor(); 550 const InputReaderSP reader_sp = m_embedded_thread_input_reader_sp; 551 debugger.PopInputReader (reader_sp); 552 m_embedded_thread_input_reader_sp.reset(); 553 } 554 555 if (m_embedded_python_input_reader_sp.get() != NULL) 556 { 557 m_embedded_python_input_reader_sp->SetIsDone (true); 558 m_embedded_python_pty.CloseSlaveFileDescriptor(); 559 const InputReaderSP reader_sp = m_embedded_python_input_reader_sp; 560 debugger.PopInputReader (reader_sp); 561 m_embedded_python_input_reader_sp.reset(); 562 } 563 564 if (m_new_sysout) 565 { 566 Locker locker(this, 567 ScriptInterpreterPython::Locker::AcquireLock, 568 ScriptInterpreterPython::Locker::FreeLock); 569 Py_XDECREF ((PyObject*)m_new_sysout); 570 } 571 } 572 573 void 574 ScriptInterpreterPython::ResetOutputFileHandle (FILE *fh) 575 { 576 if (fh == NULL) 577 return; 578 579 m_dbg_stdout = fh; 580 581 Locker locker(this, 582 ScriptInterpreterPython::Locker::AcquireLock, 583 ScriptInterpreterPython::Locker::FreeAcquiredLock); 584 585 m_new_sysout = PyFile_FromFile (m_dbg_stdout, (char *) "", (char *) "w", _check_and_flush); 586 } 587 588 void 589 ScriptInterpreterPython::SaveTerminalState (int fd) 590 { 591 // Python mucks with the terminal state of STDIN. If we can possibly avoid 592 // this by setting the file handles up correctly prior to entering the 593 // interpreter we should. For now we save and restore the terminal state 594 // on the input file handle. 595 m_terminal_state.Save (fd, false); 596 } 597 598 void 599 ScriptInterpreterPython::RestoreTerminalState () 600 { 601 // Python mucks with the terminal state of STDIN. If we can possibly avoid 602 // this by setting the file handles up correctly prior to entering the 603 // interpreter we should. For now we save and restore the terminal state 604 // on the input file handle. 605 m_terminal_state.Restore(); 606 } 607 608 void 609 ScriptInterpreterPython::LeaveSession () 610 { 611 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SCRIPT)); 612 if (log) 613 log->PutCString("ScriptInterpreterPython::LeaveSession()"); 614 615 // checking that we have a valid thread state - since we use our own threading and locking 616 // in some (rare) cases during cleanup Python may end up believing we have no thread state 617 // and PyImport_AddModule will crash if that is the case - since that seems to only happen 618 // when destroying the SBDebugger, we can make do without clearing up stdout and stderr 619 620 // rdar://problem/11292882 621 // When the current thread state is NULL, PyThreadState_Get() issues a fatal error. 622 if (PyThreadState_GetDict()) 623 { 624 PyObject *sysmod = PyImport_AddModule ("sys"); 625 PyObject *sysdict = PyModule_GetDict (sysmod); 626 627 if (m_new_sysout && sysmod && sysdict) 628 { 629 if (m_old_sysout) 630 PyDict_SetItemString (sysdict, "stdout", (PyObject*)m_old_sysout); 631 if (m_old_syserr) 632 PyDict_SetItemString (sysdict, "stderr", (PyObject*)m_old_syserr); 633 } 634 } 635 636 m_session_is_active = false; 637 } 638 639 bool 640 ScriptInterpreterPython::EnterSession (bool init_lldb_globals) 641 { 642 // If we have already entered the session, without having officially 'left' it, then there is no need to 643 // 'enter' it again. 644 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SCRIPT)); 645 if (m_session_is_active) 646 { 647 if (log) 648 log->Printf("ScriptInterpreterPython::EnterSession(init_lldb_globals=%i) session is already active, returning without doing anything", init_lldb_globals); 649 return false; 650 } 651 652 if (log) 653 log->Printf("ScriptInterpreterPython::EnterSession(init_lldb_globals=%i)", init_lldb_globals); 654 655 656 m_session_is_active = true; 657 658 StreamString run_string; 659 660 if (init_lldb_globals) 661 { 662 run_string.Printf ( "run_one_line (%s, 'lldb.debugger_unique_id = %" PRIu64, m_dictionary_name.c_str(), GetCommandInterpreter().GetDebugger().GetID()); 663 run_string.Printf ( "; lldb.debugger = lldb.SBDebugger.FindDebuggerWithID (%" PRIu64 ")", GetCommandInterpreter().GetDebugger().GetID()); 664 run_string.PutCString ("; lldb.target = lldb.debugger.GetSelectedTarget()"); 665 run_string.PutCString ("; lldb.process = lldb.target.GetProcess()"); 666 run_string.PutCString ("; lldb.thread = lldb.process.GetSelectedThread ()"); 667 run_string.PutCString ("; lldb.frame = lldb.thread.GetSelectedFrame ()"); 668 run_string.PutCString ("')"); 669 } 670 else 671 { 672 // If we aren't initing the globals, we should still always set the debugger (since that is always unique.) 673 run_string.Printf ( "run_one_line (%s, \"lldb.debugger_unique_id = %" PRIu64, m_dictionary_name.c_str(), GetCommandInterpreter().GetDebugger().GetID()); 674 run_string.Printf ( "; lldb.debugger = lldb.SBDebugger.FindDebuggerWithID (%" PRIu64 ")", GetCommandInterpreter().GetDebugger().GetID()); 675 run_string.PutCString ("\")"); 676 } 677 678 PyRun_SimpleString (run_string.GetData()); 679 run_string.Clear(); 680 681 PyObject *sysmod = PyImport_AddModule ("sys"); 682 PyObject *sysdict = PyModule_GetDict (sysmod); 683 684 if (m_new_sysout && sysmod && sysdict) 685 { 686 m_old_sysout = PyDict_GetItemString(sysdict, "stdout"); 687 m_old_syserr = PyDict_GetItemString(sysdict, "stderr"); 688 if (m_new_sysout) 689 { 690 PyDict_SetItemString (sysdict, "stdout", (PyObject*)m_new_sysout); 691 PyDict_SetItemString (sysdict, "stderr", (PyObject*)m_new_sysout); 692 } 693 } 694 695 if (PyErr_Occurred()) 696 PyErr_Clear (); 697 698 return true; 699 } 700 701 static PyObject* 702 FindSessionDictionary (const char* dict_name) 703 { 704 static std::map<ConstString,PyObject*> g_dict_map; 705 706 ConstString dict(dict_name); 707 708 std::map<ConstString,PyObject*>::iterator iter = g_dict_map.find(dict); 709 710 if (iter != g_dict_map.end()) 711 return iter->second; 712 713 PyObject *main_mod = PyImport_AddModule ("__main__"); 714 if (main_mod != NULL) 715 { 716 PyObject *main_dict = PyModule_GetDict (main_mod); 717 if ((main_dict != NULL) 718 && PyDict_Check (main_dict)) 719 { 720 // Go through the main dictionary looking for the correct python script interpreter dictionary 721 PyObject *key, *value; 722 Py_ssize_t pos = 0; 723 724 while (PyDict_Next (main_dict, &pos, &key, &value)) 725 { 726 // We have stolen references to the key and value objects in the dictionary; we need to increment 727 // them now so that Python's garbage collector doesn't collect them out from under us. 728 Py_INCREF (key); 729 Py_INCREF (value); 730 if (strcmp (PyString_AsString (key), dict_name) == 0) 731 { 732 g_dict_map[dict] = value; 733 return value; 734 } 735 } 736 } 737 } 738 return NULL; 739 } 740 741 static std::string 742 GenerateUniqueName (const char* base_name_wanted, 743 uint32_t& functions_counter, 744 void* name_token = NULL) 745 { 746 StreamString sstr; 747 748 if (!base_name_wanted) 749 return std::string(); 750 751 if (!name_token) 752 sstr.Printf ("%s_%d", base_name_wanted, functions_counter++); 753 else 754 sstr.Printf ("%s_%p", base_name_wanted, name_token); 755 756 return sstr.GetString(); 757 } 758 759 bool 760 ScriptInterpreterPython::ExecuteOneLine (const char *command, CommandReturnObject *result, const ExecuteScriptOptions &options) 761 { 762 if (!m_valid_session) 763 return false; 764 765 // We want to call run_one_line, passing in the dictionary and the command string. We cannot do this through 766 // PyRun_SimpleString here because the command string may contain escaped characters, and putting it inside 767 // another string to pass to PyRun_SimpleString messes up the escaping. So we use the following more complicated 768 // method to pass the command string directly down to Python. 769 770 Locker locker(this, 771 ScriptInterpreterPython::Locker::AcquireLock | ScriptInterpreterPython::Locker::InitSession | (options.GetSetLLDBGlobals() ? ScriptInterpreterPython::Locker::InitGlobals : 0), 772 ScriptInterpreterPython::Locker::FreeAcquiredLock | ScriptInterpreterPython::Locker::TearDownSession); 773 774 bool success = false; 775 776 if (command) 777 { 778 // Find the correct script interpreter dictionary in the main module. 779 PyObject *script_interpreter_dict = FindSessionDictionary(m_dictionary_name.c_str()); 780 if (script_interpreter_dict != NULL) 781 { 782 PyObject *pfunc = (PyObject*)m_run_one_line; 783 PyObject *pmod = PyImport_AddModule ("lldb.embedded_interpreter"); 784 if (pmod != NULL) 785 { 786 PyObject *pmod_dict = PyModule_GetDict (pmod); 787 if ((pmod_dict != NULL) 788 && PyDict_Check (pmod_dict)) 789 { 790 if (!pfunc) 791 { 792 PyObject *key, *value; 793 Py_ssize_t pos = 0; 794 795 while (PyDict_Next (pmod_dict, &pos, &key, &value)) 796 { 797 Py_INCREF (key); 798 Py_INCREF (value); 799 if (strcmp (PyString_AsString (key), "run_one_line") == 0) 800 { 801 pfunc = value; 802 break; 803 } 804 } 805 m_run_one_line = pfunc; 806 } 807 808 if (pfunc && PyCallable_Check (pfunc)) 809 { 810 PyObject *pargs = Py_BuildValue("(Os)",script_interpreter_dict,command); 811 if (pargs != NULL) 812 { 813 PyObject *pvalue = NULL; 814 { // scope for PythonInputReaderManager 815 PythonInputReaderManager py_input(options.GetEnableIO() ? this : NULL); 816 pvalue = PyObject_CallObject (pfunc, pargs); 817 } 818 Py_XDECREF (pargs); 819 if (pvalue != NULL) 820 { 821 Py_XDECREF (pvalue); 822 success = true; 823 } 824 else if (options.GetMaskoutErrors() && PyErr_Occurred ()) 825 { 826 PyErr_Print(); 827 PyErr_Clear(); 828 } 829 } 830 } 831 } 832 } 833 Py_INCREF (script_interpreter_dict); 834 } 835 836 if (success) 837 return true; 838 839 // The one-liner failed. Append the error message. 840 if (result) 841 result->AppendErrorWithFormat ("python failed attempting to evaluate '%s'\n", command); 842 return false; 843 } 844 845 if (result) 846 result->AppendError ("empty command passed to python\n"); 847 return false; 848 } 849 850 size_t 851 ScriptInterpreterPython::InputReaderCallback 852 ( 853 void *baton, 854 InputReader &reader, 855 InputReaderAction notification, 856 const char *bytes, 857 size_t bytes_len 858 ) 859 { 860 lldb::thread_t embedded_interpreter_thread; 861 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SCRIPT)); 862 863 if (baton == NULL) 864 return 0; 865 866 ScriptInterpreterPython *script_interpreter = (ScriptInterpreterPython *) baton; 867 868 if (script_interpreter->m_script_lang != eScriptLanguagePython) 869 return 0; 870 871 switch (notification) 872 { 873 case eInputReaderActivate: 874 { 875 StreamSP out_stream = reader.GetDebugger().GetAsyncOutputStream(); 876 bool batch_mode = reader.GetDebugger().GetCommandInterpreter().GetBatchCommandMode(); 877 if (!batch_mode) 878 { 879 out_stream->Printf ("Python Interactive Interpreter. To exit, type 'quit()', 'exit()' or Ctrl-D.\n"); 880 out_stream->Flush(); 881 } 882 883 // Save terminal settings if we can 884 int input_fd = reader.GetDebugger().GetInputFile().GetDescriptor(); 885 if (input_fd == File::kInvalidDescriptor) 886 input_fd = STDIN_FILENO; 887 888 script_interpreter->SaveTerminalState(input_fd); 889 890 { 891 ScriptInterpreterPython::Locker locker(script_interpreter, 892 ScriptInterpreterPython::Locker::AcquireLock | ScriptInterpreterPython::Locker::InitSession | ScriptInterpreterPython::Locker::InitGlobals, 893 ScriptInterpreterPython::Locker::FreeAcquiredLock); 894 } 895 896 char error_str[1024]; 897 if (script_interpreter->m_embedded_python_pty.OpenFirstAvailableMaster (O_RDWR|O_NOCTTY, error_str, 898 sizeof(error_str))) 899 { 900 if (log) 901 log->Printf ("ScriptInterpreterPython::InputReaderCallback, Activate, succeeded in opening master pty (fd = %d).", 902 script_interpreter->m_embedded_python_pty.GetMasterFileDescriptor()); 903 embedded_interpreter_thread = Host::ThreadCreate ("<lldb.script-interpreter.embedded-python-loop>", 904 ScriptInterpreterPython::RunEmbeddedPythonInterpreter, 905 script_interpreter, NULL); 906 if (IS_VALID_LLDB_HOST_THREAD(embedded_interpreter_thread)) 907 { 908 if (log) 909 log->Printf ("ScriptInterpreterPython::InputReaderCallback, Activate, succeeded in creating thread (thread_t = %p)", (void *)embedded_interpreter_thread); 910 Error detach_error; 911 Host::ThreadDetach (embedded_interpreter_thread, &detach_error); 912 } 913 else 914 { 915 if (log) 916 log->Printf ("ScriptInterpreterPython::InputReaderCallback, Activate, failed in creating thread"); 917 reader.SetIsDone (true); 918 } 919 } 920 else 921 { 922 if (log) 923 log->Printf ("ScriptInterpreterPython::InputReaderCallback, Activate, failed to open master pty "); 924 reader.SetIsDone (true); 925 } 926 } 927 break; 928 929 case eInputReaderDeactivate: 930 // When another input reader is pushed, don't leave the session... 931 //script_interpreter->LeaveSession (); 932 break; 933 934 case eInputReaderReactivate: 935 { 936 ScriptInterpreterPython::Locker locker (script_interpreter, 937 ScriptInterpreterPython::Locker::AcquireLock | ScriptInterpreterPython::Locker::InitSession, 938 ScriptInterpreterPython::Locker::FreeAcquiredLock); 939 } 940 break; 941 942 case eInputReaderAsynchronousOutputWritten: 943 break; 944 945 case eInputReaderInterrupt: 946 ::write (script_interpreter->m_embedded_python_pty.GetMasterFileDescriptor(), "raise KeyboardInterrupt\n", 24); 947 break; 948 949 case eInputReaderEndOfFile: 950 ::write (script_interpreter->m_embedded_python_pty.GetMasterFileDescriptor(), "quit()\n", 7); 951 break; 952 953 case eInputReaderGotToken: 954 if (script_interpreter->m_embedded_python_pty.GetMasterFileDescriptor() != -1) 955 { 956 if (log) 957 log->Printf ("ScriptInterpreterPython::InputReaderCallback, GotToken, bytes='%s', byte_len = %lu", bytes, 958 bytes_len); 959 if (bytes && bytes_len) 960 { 961 if ((int) bytes[0] == 4) 962 ::write (script_interpreter->m_embedded_python_pty.GetMasterFileDescriptor(), "quit()", 6); 963 else 964 ::write (script_interpreter->m_embedded_python_pty.GetMasterFileDescriptor(), bytes, bytes_len); 965 } 966 ::write (script_interpreter->m_embedded_python_pty.GetMasterFileDescriptor(), "\n", 1); 967 } 968 else 969 { 970 if (log) 971 log->Printf ("ScriptInterpreterPython::InputReaderCallback, GotToken, bytes='%s', byte_len = %lu, Master File Descriptor is bad.", 972 bytes, 973 bytes_len); 974 reader.SetIsDone (true); 975 } 976 977 break; 978 979 case eInputReaderDone: 980 { 981 Locker locker(script_interpreter, 982 ScriptInterpreterPython::Locker::AcquireLock, 983 ScriptInterpreterPython::Locker::FreeAcquiredLock); 984 script_interpreter->LeaveSession (); 985 } 986 987 // Restore terminal settings if they were validly saved 988 if (log) 989 log->Printf ("ScriptInterpreterPython::InputReaderCallback, Done, closing down input reader."); 990 991 script_interpreter->RestoreTerminalState (); 992 993 script_interpreter->m_embedded_python_pty.CloseMasterFileDescriptor(); 994 break; 995 } 996 997 return bytes_len; 998 } 999 1000 1001 void 1002 ScriptInterpreterPython::ExecuteInterpreterLoop () 1003 { 1004 Timer scoped_timer (__PRETTY_FUNCTION__, __PRETTY_FUNCTION__); 1005 1006 Debugger &debugger = GetCommandInterpreter().GetDebugger(); 1007 1008 // At the moment, the only time the debugger does not have an input file handle is when this is called 1009 // directly from Python, in which case it is both dangerous and unnecessary (not to mention confusing) to 1010 // try to embed a running interpreter loop inside the already running Python interpreter loop, so we won't 1011 // do it. 1012 1013 if (!debugger.GetInputFile().IsValid()) 1014 return; 1015 1016 InputReaderSP reader_sp (new InputReader(debugger)); 1017 if (reader_sp) 1018 { 1019 Error error (reader_sp->Initialize (ScriptInterpreterPython::InputReaderCallback, 1020 this, // baton 1021 eInputReaderGranularityLine, // token size, to pass to callback function 1022 NULL, // end token 1023 NULL, // prompt 1024 true)); // echo input 1025 1026 if (error.Success()) 1027 { 1028 debugger.PushInputReader (reader_sp); 1029 m_embedded_python_input_reader_sp = reader_sp; 1030 } 1031 } 1032 } 1033 1034 bool 1035 ScriptInterpreterPython::ExecuteOneLineWithReturn (const char *in_string, 1036 ScriptInterpreter::ScriptReturnType return_type, 1037 void *ret_value, 1038 const ExecuteScriptOptions &options) 1039 { 1040 1041 Locker locker(this, 1042 ScriptInterpreterPython::Locker::AcquireLock | ScriptInterpreterPython::Locker::InitSession | (options.GetSetLLDBGlobals() ? ScriptInterpreterPython::Locker::InitGlobals : 0), 1043 ScriptInterpreterPython::Locker::FreeAcquiredLock | ScriptInterpreterPython::Locker::TearDownSession); 1044 1045 PyObject *py_return = NULL; 1046 PyObject *mainmod = PyImport_AddModule ("__main__"); 1047 PyObject *globals = PyModule_GetDict (mainmod); 1048 PyObject *locals = NULL; 1049 PyObject *py_error = NULL; 1050 bool ret_success = false; 1051 bool should_decrement_locals = false; 1052 int success; 1053 1054 locals = FindSessionDictionary(m_dictionary_name.c_str()); 1055 1056 if (locals == NULL) 1057 { 1058 locals = PyObject_GetAttrString (globals, m_dictionary_name.c_str()); 1059 should_decrement_locals = true; 1060 } 1061 1062 if (locals == NULL) 1063 { 1064 locals = globals; 1065 should_decrement_locals = false; 1066 } 1067 1068 py_error = PyErr_Occurred(); 1069 if (py_error != NULL) 1070 PyErr_Clear(); 1071 1072 if (in_string != NULL) 1073 { 1074 { // scope for PythonInputReaderManager 1075 PythonInputReaderManager py_input(options.GetEnableIO() ? this : NULL); 1076 py_return = PyRun_String (in_string, Py_eval_input, globals, locals); 1077 if (py_return == NULL) 1078 { 1079 py_error = PyErr_Occurred (); 1080 if (py_error != NULL) 1081 PyErr_Clear (); 1082 1083 py_return = PyRun_String (in_string, Py_single_input, globals, locals); 1084 } 1085 } 1086 1087 if (locals != NULL 1088 && should_decrement_locals) 1089 Py_XDECREF (locals); 1090 1091 if (py_return != NULL) 1092 { 1093 switch (return_type) 1094 { 1095 case eScriptReturnTypeCharPtr: // "char *" 1096 { 1097 const char format[3] = "s#"; 1098 success = PyArg_Parse (py_return, format, (char **) ret_value); 1099 break; 1100 } 1101 case eScriptReturnTypeCharStrOrNone: // char* or NULL if py_return == Py_None 1102 { 1103 const char format[3] = "z"; 1104 success = PyArg_Parse (py_return, format, (char **) ret_value); 1105 break; 1106 } 1107 case eScriptReturnTypeBool: 1108 { 1109 const char format[2] = "b"; 1110 success = PyArg_Parse (py_return, format, (bool *) ret_value); 1111 break; 1112 } 1113 case eScriptReturnTypeShortInt: 1114 { 1115 const char format[2] = "h"; 1116 success = PyArg_Parse (py_return, format, (short *) ret_value); 1117 break; 1118 } 1119 case eScriptReturnTypeShortIntUnsigned: 1120 { 1121 const char format[2] = "H"; 1122 success = PyArg_Parse (py_return, format, (unsigned short *) ret_value); 1123 break; 1124 } 1125 case eScriptReturnTypeInt: 1126 { 1127 const char format[2] = "i"; 1128 success = PyArg_Parse (py_return, format, (int *) ret_value); 1129 break; 1130 } 1131 case eScriptReturnTypeIntUnsigned: 1132 { 1133 const char format[2] = "I"; 1134 success = PyArg_Parse (py_return, format, (unsigned int *) ret_value); 1135 break; 1136 } 1137 case eScriptReturnTypeLongInt: 1138 { 1139 const char format[2] = "l"; 1140 success = PyArg_Parse (py_return, format, (long *) ret_value); 1141 break; 1142 } 1143 case eScriptReturnTypeLongIntUnsigned: 1144 { 1145 const char format[2] = "k"; 1146 success = PyArg_Parse (py_return, format, (unsigned long *) ret_value); 1147 break; 1148 } 1149 case eScriptReturnTypeLongLong: 1150 { 1151 const char format[2] = "L"; 1152 success = PyArg_Parse (py_return, format, (long long *) ret_value); 1153 break; 1154 } 1155 case eScriptReturnTypeLongLongUnsigned: 1156 { 1157 const char format[2] = "K"; 1158 success = PyArg_Parse (py_return, format, (unsigned long long *) ret_value); 1159 break; 1160 } 1161 case eScriptReturnTypeFloat: 1162 { 1163 const char format[2] = "f"; 1164 success = PyArg_Parse (py_return, format, (float *) ret_value); 1165 break; 1166 } 1167 case eScriptReturnTypeDouble: 1168 { 1169 const char format[2] = "d"; 1170 success = PyArg_Parse (py_return, format, (double *) ret_value); 1171 break; 1172 } 1173 case eScriptReturnTypeChar: 1174 { 1175 const char format[2] = "c"; 1176 success = PyArg_Parse (py_return, format, (char *) ret_value); 1177 break; 1178 } 1179 } 1180 Py_XDECREF (py_return); 1181 if (success) 1182 ret_success = true; 1183 else 1184 ret_success = false; 1185 } 1186 } 1187 1188 py_error = PyErr_Occurred(); 1189 if (py_error != NULL) 1190 { 1191 ret_success = false; 1192 if (options.GetMaskoutErrors()) 1193 { 1194 if (PyErr_GivenExceptionMatches (py_error, PyExc_SyntaxError)) 1195 PyErr_Print (); 1196 PyErr_Clear(); 1197 } 1198 } 1199 1200 return ret_success; 1201 } 1202 1203 bool 1204 ScriptInterpreterPython::ExecuteMultipleLines (const char *in_string, const ExecuteScriptOptions &options) 1205 { 1206 1207 1208 Locker locker(this, 1209 ScriptInterpreterPython::Locker::AcquireLock | ScriptInterpreterPython::Locker::InitSession | (options.GetSetLLDBGlobals() ? ScriptInterpreterPython::Locker::InitGlobals : 0), 1210 ScriptInterpreterPython::Locker::FreeAcquiredLock | ScriptInterpreterPython::Locker::TearDownSession); 1211 1212 bool success = false; 1213 PyObject *py_return = NULL; 1214 PyObject *mainmod = PyImport_AddModule ("__main__"); 1215 PyObject *globals = PyModule_GetDict (mainmod); 1216 PyObject *locals = NULL; 1217 PyObject *py_error = NULL; 1218 bool should_decrement_locals = false; 1219 1220 locals = FindSessionDictionary(m_dictionary_name.c_str()); 1221 1222 if (locals == NULL) 1223 { 1224 locals = PyObject_GetAttrString (globals, m_dictionary_name.c_str()); 1225 should_decrement_locals = true; 1226 } 1227 1228 if (locals == NULL) 1229 { 1230 locals = globals; 1231 should_decrement_locals = false; 1232 } 1233 1234 py_error = PyErr_Occurred(); 1235 if (py_error != NULL) 1236 PyErr_Clear(); 1237 1238 if (in_string != NULL) 1239 { 1240 struct _node *compiled_node = PyParser_SimpleParseString (in_string, Py_file_input); 1241 if (compiled_node) 1242 { 1243 PyCodeObject *compiled_code = PyNode_Compile (compiled_node, "temp.py"); 1244 if (compiled_code) 1245 { 1246 { // scope for PythonInputReaderManager 1247 PythonInputReaderManager py_input(options.GetEnableIO() ? this : NULL); 1248 py_return = PyEval_EvalCode (compiled_code, globals, locals); 1249 } 1250 if (py_return != NULL) 1251 { 1252 success = true; 1253 Py_XDECREF (py_return); 1254 } 1255 if (locals && should_decrement_locals) 1256 Py_XDECREF (locals); 1257 } 1258 } 1259 } 1260 1261 py_error = PyErr_Occurred (); 1262 if (py_error != NULL) 1263 { 1264 success = false; 1265 if (options.GetMaskoutErrors()) 1266 { 1267 if (PyErr_GivenExceptionMatches (py_error, PyExc_SyntaxError)) 1268 PyErr_Print (); 1269 PyErr_Clear(); 1270 } 1271 } 1272 1273 return success; 1274 } 1275 1276 static const char *g_reader_instructions = "Enter your Python command(s). Type 'DONE' to end."; 1277 1278 static const char *g_bkpt_command_reader_instructions = "Enter your Python command(s). Type 'DONE' to end.\n" 1279 "def function(frame,bp_loc,internal_dict):\n" 1280 " \"\"\"frame: the SBFrame for the location at which you stopped\n" 1281 " bp_loc: an SBBreakpointLocation for the breakpoint location information\n" 1282 " internal_dict: an LLDB support object not to be used\"\"\""; 1283 1284 size_t 1285 ScriptInterpreterPython::GenerateBreakpointOptionsCommandCallback 1286 ( 1287 void *baton, 1288 InputReader &reader, 1289 InputReaderAction notification, 1290 const char *bytes, 1291 size_t bytes_len 1292 ) 1293 { 1294 static StringList commands_in_progress; 1295 1296 switch (notification) 1297 { 1298 case eInputReaderActivate: 1299 { 1300 1301 StreamSP out_stream = reader.GetDebugger().GetAsyncOutputStream(); 1302 bool batch_mode = reader.GetDebugger().GetCommandInterpreter().GetBatchCommandMode(); 1303 commands_in_progress.Clear(); 1304 if (!batch_mode) 1305 { 1306 out_stream->Printf ("%s\n", g_bkpt_command_reader_instructions); 1307 if (reader.GetPrompt()) 1308 out_stream->Printf ("%s", reader.GetPrompt()); 1309 out_stream->Flush (); 1310 } 1311 } 1312 break; 1313 1314 case eInputReaderDeactivate: 1315 break; 1316 1317 case eInputReaderReactivate: 1318 { 1319 StreamSP out_stream = reader.GetDebugger().GetAsyncOutputStream(); 1320 bool batch_mode = reader.GetDebugger().GetCommandInterpreter().GetBatchCommandMode(); 1321 if (reader.GetPrompt() && !batch_mode) 1322 { 1323 out_stream->Printf ("%s", reader.GetPrompt()); 1324 out_stream->Flush (); 1325 } 1326 } 1327 break; 1328 1329 case eInputReaderAsynchronousOutputWritten: 1330 break; 1331 1332 case eInputReaderGotToken: 1333 { 1334 StreamSP out_stream = reader.GetDebugger().GetAsyncOutputStream(); 1335 bool batch_mode = reader.GetDebugger().GetCommandInterpreter().GetBatchCommandMode(); 1336 std::string temp_string (bytes, bytes_len); 1337 commands_in_progress.AppendString (temp_string.c_str()); 1338 if (!reader.IsDone() && reader.GetPrompt() && !batch_mode) 1339 { 1340 out_stream->Printf ("%s", reader.GetPrompt()); 1341 out_stream->Flush (); 1342 } 1343 } 1344 break; 1345 1346 case eInputReaderEndOfFile: 1347 case eInputReaderInterrupt: 1348 // Control-c (SIGINT) & control-d both mean finish & exit. 1349 reader.SetIsDone(true); 1350 1351 // Control-c (SIGINT) ALSO means cancel; do NOT create a breakpoint command. 1352 if (notification == eInputReaderInterrupt) 1353 commands_in_progress.Clear(); 1354 1355 // Fall through here... 1356 1357 case eInputReaderDone: 1358 { 1359 bool batch_mode = notification == eInputReaderDone ? 1360 reader.GetDebugger().GetCommandInterpreter().GetBatchCommandMode() : 1361 true; 1362 BreakpointOptions *bp_options = (BreakpointOptions *)baton; 1363 std::unique_ptr<BreakpointOptions::CommandData> data_ap(new BreakpointOptions::CommandData()); 1364 data_ap->user_source.AppendList (commands_in_progress); 1365 if (data_ap.get()) 1366 { 1367 ScriptInterpreter *interpreter = reader.GetDebugger().GetCommandInterpreter().GetScriptInterpreter(); 1368 if (interpreter) 1369 { 1370 if (interpreter->GenerateBreakpointCommandCallbackData (data_ap->user_source, 1371 data_ap->script_source)) 1372 { 1373 BatonSP baton_sp (new BreakpointOptions::CommandBaton (data_ap.release())); 1374 bp_options->SetCallback (ScriptInterpreterPython::BreakpointCallbackFunction, baton_sp); 1375 } 1376 else if (!batch_mode) 1377 { 1378 StreamSP out_stream = reader.GetDebugger().GetAsyncOutputStream(); 1379 out_stream->Printf ("Warning: No command attached to breakpoint.\n"); 1380 out_stream->Flush(); 1381 } 1382 } 1383 else 1384 { 1385 if (!batch_mode) 1386 { 1387 StreamSP out_stream = reader.GetDebugger().GetAsyncOutputStream(); 1388 out_stream->Printf ("Warning: Unable to find script intepreter; no command attached to breakpoint.\n"); 1389 out_stream->Flush(); 1390 } 1391 } 1392 } 1393 } 1394 break; 1395 1396 } 1397 1398 return bytes_len; 1399 } 1400 1401 size_t 1402 ScriptInterpreterPython::GenerateWatchpointOptionsCommandCallback 1403 ( 1404 void *baton, 1405 InputReader &reader, 1406 InputReaderAction notification, 1407 const char *bytes, 1408 size_t bytes_len 1409 ) 1410 { 1411 static StringList commands_in_progress; 1412 1413 switch (notification) 1414 { 1415 case eInputReaderActivate: 1416 { 1417 StreamSP out_stream = reader.GetDebugger().GetAsyncOutputStream(); 1418 bool batch_mode = reader.GetDebugger().GetCommandInterpreter().GetBatchCommandMode(); 1419 1420 commands_in_progress.Clear(); 1421 if (!batch_mode) 1422 { 1423 out_stream->Printf ("%s\n", g_reader_instructions); 1424 if (reader.GetPrompt()) 1425 out_stream->Printf ("%s", reader.GetPrompt()); 1426 out_stream->Flush (); 1427 } 1428 } 1429 break; 1430 1431 case eInputReaderDeactivate: 1432 break; 1433 1434 case eInputReaderReactivate: 1435 { 1436 StreamSP out_stream = reader.GetDebugger().GetAsyncOutputStream(); 1437 bool batch_mode = reader.GetDebugger().GetCommandInterpreter().GetBatchCommandMode(); 1438 if (reader.GetPrompt() && !batch_mode) 1439 { 1440 out_stream->Printf ("%s", reader.GetPrompt()); 1441 out_stream->Flush (); 1442 } 1443 } 1444 break; 1445 1446 case eInputReaderAsynchronousOutputWritten: 1447 break; 1448 1449 case eInputReaderGotToken: 1450 { 1451 StreamSP out_stream = reader.GetDebugger().GetAsyncOutputStream(); 1452 bool batch_mode = reader.GetDebugger().GetCommandInterpreter().GetBatchCommandMode(); 1453 std::string temp_string (bytes, bytes_len); 1454 commands_in_progress.AppendString (temp_string.c_str()); 1455 if (!reader.IsDone() && reader.GetPrompt() && !batch_mode) 1456 { 1457 out_stream->Printf ("%s", reader.GetPrompt()); 1458 out_stream->Flush (); 1459 } 1460 } 1461 break; 1462 1463 case eInputReaderEndOfFile: 1464 case eInputReaderInterrupt: 1465 // Control-c (SIGINT) & control-d both mean finish & exit. 1466 reader.SetIsDone(true); 1467 1468 // Control-c (SIGINT) ALSO means cancel; do NOT create a breakpoint command. 1469 if (notification == eInputReaderInterrupt) 1470 commands_in_progress.Clear(); 1471 1472 // Fall through here... 1473 1474 case eInputReaderDone: 1475 { 1476 bool batch_mode = notification == eInputReaderDone ? 1477 reader.GetDebugger().GetCommandInterpreter().GetBatchCommandMode() : 1478 true; 1479 WatchpointOptions *wp_options = (WatchpointOptions *)baton; 1480 std::unique_ptr<WatchpointOptions::CommandData> data_ap(new WatchpointOptions::CommandData()); 1481 data_ap->user_source.AppendList (commands_in_progress); 1482 if (data_ap.get()) 1483 { 1484 ScriptInterpreter *interpreter = reader.GetDebugger().GetCommandInterpreter().GetScriptInterpreter(); 1485 if (interpreter) 1486 { 1487 if (interpreter->GenerateWatchpointCommandCallbackData (data_ap->user_source, 1488 data_ap->script_source)) 1489 { 1490 BatonSP baton_sp (new WatchpointOptions::CommandBaton (data_ap.release())); 1491 wp_options->SetCallback (ScriptInterpreterPython::WatchpointCallbackFunction, baton_sp); 1492 } 1493 else if (!batch_mode) 1494 { 1495 StreamSP out_stream = reader.GetDebugger().GetAsyncOutputStream(); 1496 out_stream->Printf ("Warning: No command attached to breakpoint.\n"); 1497 out_stream->Flush(); 1498 } 1499 } 1500 else 1501 { 1502 if (!batch_mode) 1503 { 1504 StreamSP out_stream = reader.GetDebugger().GetAsyncOutputStream(); 1505 out_stream->Printf ("Warning: Unable to find script intepreter; no command attached to breakpoint.\n"); 1506 out_stream->Flush(); 1507 } 1508 } 1509 } 1510 } 1511 break; 1512 1513 } 1514 1515 return bytes_len; 1516 } 1517 1518 void 1519 ScriptInterpreterPython::CollectDataForBreakpointCommandCallback (BreakpointOptions *bp_options, 1520 CommandReturnObject &result) 1521 { 1522 Debugger &debugger = GetCommandInterpreter().GetDebugger(); 1523 1524 InputReaderSP reader_sp (new InputReader (debugger)); 1525 1526 if (reader_sp) 1527 { 1528 Error err = reader_sp->Initialize ( 1529 ScriptInterpreterPython::GenerateBreakpointOptionsCommandCallback, 1530 bp_options, // baton 1531 eInputReaderGranularityLine, // token size, for feeding data to callback function 1532 "DONE", // end token 1533 " ", // prompt 1534 true); // echo input 1535 1536 if (err.Success()) 1537 debugger.PushInputReader (reader_sp); 1538 else 1539 { 1540 result.AppendError (err.AsCString()); 1541 result.SetStatus (eReturnStatusFailed); 1542 } 1543 } 1544 else 1545 { 1546 result.AppendError("out of memory"); 1547 result.SetStatus (eReturnStatusFailed); 1548 } 1549 } 1550 1551 void 1552 ScriptInterpreterPython::CollectDataForWatchpointCommandCallback (WatchpointOptions *wp_options, 1553 CommandReturnObject &result) 1554 { 1555 Debugger &debugger = GetCommandInterpreter().GetDebugger(); 1556 1557 InputReaderSP reader_sp (new InputReader (debugger)); 1558 1559 if (reader_sp) 1560 { 1561 Error err = reader_sp->Initialize ( 1562 ScriptInterpreterPython::GenerateWatchpointOptionsCommandCallback, 1563 wp_options, // baton 1564 eInputReaderGranularityLine, // token size, for feeding data to callback function 1565 "DONE", // end token 1566 "> ", // prompt 1567 true); // echo input 1568 1569 if (err.Success()) 1570 debugger.PushInputReader (reader_sp); 1571 else 1572 { 1573 result.AppendError (err.AsCString()); 1574 result.SetStatus (eReturnStatusFailed); 1575 } 1576 } 1577 else 1578 { 1579 result.AppendError("out of memory"); 1580 result.SetStatus (eReturnStatusFailed); 1581 } 1582 } 1583 1584 // Set a Python one-liner as the callback for the breakpoint. 1585 void 1586 ScriptInterpreterPython::SetBreakpointCommandCallback (BreakpointOptions *bp_options, 1587 const char *oneliner) 1588 { 1589 std::unique_ptr<BreakpointOptions::CommandData> data_ap(new BreakpointOptions::CommandData()); 1590 1591 // It's necessary to set both user_source and script_source to the oneliner. 1592 // The former is used to generate callback description (as in breakpoint command list) 1593 // while the latter is used for Python to interpret during the actual callback. 1594 1595 data_ap->user_source.AppendString (oneliner); 1596 data_ap->script_source.assign (oneliner); 1597 1598 if (GenerateBreakpointCommandCallbackData (data_ap->user_source, data_ap->script_source)) 1599 { 1600 BatonSP baton_sp (new BreakpointOptions::CommandBaton (data_ap.release())); 1601 bp_options->SetCallback (ScriptInterpreterPython::BreakpointCallbackFunction, baton_sp); 1602 } 1603 1604 return; 1605 } 1606 1607 // Set a Python one-liner as the callback for the watchpoint. 1608 void 1609 ScriptInterpreterPython::SetWatchpointCommandCallback (WatchpointOptions *wp_options, 1610 const char *oneliner) 1611 { 1612 std::unique_ptr<WatchpointOptions::CommandData> data_ap(new WatchpointOptions::CommandData()); 1613 1614 // It's necessary to set both user_source and script_source to the oneliner. 1615 // The former is used to generate callback description (as in watchpoint command list) 1616 // while the latter is used for Python to interpret during the actual callback. 1617 1618 data_ap->user_source.AppendString (oneliner); 1619 data_ap->script_source.assign (oneliner); 1620 1621 if (GenerateWatchpointCommandCallbackData (data_ap->user_source, data_ap->script_source)) 1622 { 1623 BatonSP baton_sp (new WatchpointOptions::CommandBaton (data_ap.release())); 1624 wp_options->SetCallback (ScriptInterpreterPython::WatchpointCallbackFunction, baton_sp); 1625 } 1626 1627 return; 1628 } 1629 1630 bool 1631 ScriptInterpreterPython::ExportFunctionDefinitionToInterpreter (StringList &function_def) 1632 { 1633 // Convert StringList to one long, newline delimited, const char *. 1634 std::string function_def_string(function_def.CopyList()); 1635 1636 return ExecuteMultipleLines (function_def_string.c_str(), ScriptInterpreter::ExecuteScriptOptions().SetEnableIO(false)); 1637 } 1638 1639 bool 1640 ScriptInterpreterPython::GenerateFunction(const char *signature, const StringList &input) 1641 { 1642 int num_lines = input.GetSize (); 1643 if (num_lines == 0) 1644 return false; 1645 1646 if (!signature || *signature == 0) 1647 return false; 1648 1649 StreamString sstr; 1650 StringList auto_generated_function; 1651 auto_generated_function.AppendString (signature); 1652 auto_generated_function.AppendString (" global_dict = globals()"); // Grab the global dictionary 1653 auto_generated_function.AppendString (" new_keys = internal_dict.keys()"); // Make a list of keys in the session dict 1654 auto_generated_function.AppendString (" old_keys = global_dict.keys()"); // Save list of keys in global dict 1655 auto_generated_function.AppendString (" global_dict.update (internal_dict)"); // Add the session dictionary to the 1656 // global dictionary. 1657 1658 // Wrap everything up inside the function, increasing the indentation. 1659 1660 auto_generated_function.AppendString(" if True:"); 1661 for (int i = 0; i < num_lines; ++i) 1662 { 1663 sstr.Clear (); 1664 sstr.Printf (" %s", input.GetStringAtIndex (i)); 1665 auto_generated_function.AppendString (sstr.GetData()); 1666 } 1667 auto_generated_function.AppendString (" for key in new_keys:"); // Iterate over all the keys from session dict 1668 auto_generated_function.AppendString (" internal_dict[key] = global_dict[key]"); // Update session dict values 1669 auto_generated_function.AppendString (" if key not in old_keys:"); // If key was not originally in global dict 1670 auto_generated_function.AppendString (" del global_dict[key]"); // ...then remove key/value from global dict 1671 1672 // Verify that the results are valid Python. 1673 1674 if (!ExportFunctionDefinitionToInterpreter (auto_generated_function)) 1675 return false; 1676 1677 return true; 1678 1679 } 1680 1681 bool 1682 ScriptInterpreterPython::GenerateTypeScriptFunction (StringList &user_input, std::string& output, void* name_token) 1683 { 1684 static uint32_t num_created_functions = 0; 1685 user_input.RemoveBlankLines (); 1686 StreamString sstr; 1687 1688 // Check to see if we have any data; if not, just return. 1689 if (user_input.GetSize() == 0) 1690 return false; 1691 1692 // Take what the user wrote, wrap it all up inside one big auto-generated Python function, passing in the 1693 // ValueObject as parameter to the function. 1694 1695 std::string auto_generated_function_name(GenerateUniqueName("lldb_autogen_python_type_print_func", num_created_functions, name_token)); 1696 sstr.Printf ("def %s (valobj, internal_dict):", auto_generated_function_name.c_str()); 1697 1698 if (!GenerateFunction(sstr.GetData(), user_input)) 1699 return false; 1700 1701 // Store the name of the auto-generated function to be called. 1702 output.assign(auto_generated_function_name); 1703 return true; 1704 } 1705 1706 bool 1707 ScriptInterpreterPython::GenerateScriptAliasFunction (StringList &user_input, std::string &output) 1708 { 1709 static uint32_t num_created_functions = 0; 1710 user_input.RemoveBlankLines (); 1711 StreamString sstr; 1712 1713 // Check to see if we have any data; if not, just return. 1714 if (user_input.GetSize() == 0) 1715 return false; 1716 1717 std::string auto_generated_function_name(GenerateUniqueName("lldb_autogen_python_cmd_alias_func", num_created_functions)); 1718 1719 sstr.Printf ("def %s (debugger, args, result, internal_dict):", auto_generated_function_name.c_str()); 1720 1721 if (!GenerateFunction(sstr.GetData(),user_input)) 1722 return false; 1723 1724 // Store the name of the auto-generated function to be called. 1725 output.assign(auto_generated_function_name); 1726 return true; 1727 } 1728 1729 1730 bool 1731 ScriptInterpreterPython::GenerateTypeSynthClass (StringList &user_input, std::string &output, void* name_token) 1732 { 1733 static uint32_t num_created_classes = 0; 1734 user_input.RemoveBlankLines (); 1735 int num_lines = user_input.GetSize (); 1736 StreamString sstr; 1737 1738 // Check to see if we have any data; if not, just return. 1739 if (user_input.GetSize() == 0) 1740 return false; 1741 1742 // Wrap all user input into a Python class 1743 1744 std::string auto_generated_class_name(GenerateUniqueName("lldb_autogen_python_type_synth_class",num_created_classes,name_token)); 1745 1746 StringList auto_generated_class; 1747 1748 // Create the function name & definition string. 1749 1750 sstr.Printf ("class %s:", auto_generated_class_name.c_str()); 1751 auto_generated_class.AppendString (sstr.GetData()); 1752 1753 // Wrap everything up inside the class, increasing the indentation. 1754 // we don't need to play any fancy indentation tricks here because there is no 1755 // surrounding code whose indentation we need to honor 1756 for (int i = 0; i < num_lines; ++i) 1757 { 1758 sstr.Clear (); 1759 sstr.Printf (" %s", user_input.GetStringAtIndex (i)); 1760 auto_generated_class.AppendString (sstr.GetData()); 1761 } 1762 1763 1764 // Verify that the results are valid Python. 1765 // (even though the method is ExportFunctionDefinitionToInterpreter, a class will actually be exported) 1766 // (TODO: rename that method to ExportDefinitionToInterpreter) 1767 if (!ExportFunctionDefinitionToInterpreter (auto_generated_class)) 1768 return false; 1769 1770 // Store the name of the auto-generated class 1771 1772 output.assign(auto_generated_class_name); 1773 return true; 1774 } 1775 1776 lldb::ScriptInterpreterObjectSP 1777 ScriptInterpreterPython::OSPlugin_CreatePluginObject (const char *class_name, lldb::ProcessSP process_sp) 1778 { 1779 if (class_name == NULL || class_name[0] == '\0') 1780 return lldb::ScriptInterpreterObjectSP(); 1781 1782 if (!process_sp) 1783 return lldb::ScriptInterpreterObjectSP(); 1784 1785 void* ret_val; 1786 1787 { 1788 Locker py_lock(this,Locker::AcquireLock,Locker::FreeLock); 1789 ret_val = g_swig_create_os_plugin (class_name, 1790 m_dictionary_name.c_str(), 1791 process_sp); 1792 } 1793 1794 return MakeScriptObject(ret_val); 1795 } 1796 1797 lldb::ScriptInterpreterObjectSP 1798 ScriptInterpreterPython::OSPlugin_RegisterInfo (lldb::ScriptInterpreterObjectSP os_plugin_object_sp) 1799 { 1800 Locker py_lock(this,Locker::AcquireLock,Locker::FreeLock); 1801 1802 static char callee_name[] = "get_register_info"; 1803 1804 if (!os_plugin_object_sp) 1805 return lldb::ScriptInterpreterObjectSP(); 1806 1807 PyObject* implementor = (PyObject*)os_plugin_object_sp->GetObject(); 1808 1809 if (implementor == NULL || implementor == Py_None) 1810 return lldb::ScriptInterpreterObjectSP(); 1811 1812 PyObject* pmeth = PyObject_GetAttrString(implementor, callee_name); 1813 1814 if (PyErr_Occurred()) 1815 { 1816 PyErr_Clear(); 1817 } 1818 1819 if (pmeth == NULL || pmeth == Py_None) 1820 { 1821 Py_XDECREF(pmeth); 1822 return lldb::ScriptInterpreterObjectSP(); 1823 } 1824 1825 if (PyCallable_Check(pmeth) == 0) 1826 { 1827 if (PyErr_Occurred()) 1828 { 1829 PyErr_Clear(); 1830 } 1831 1832 Py_XDECREF(pmeth); 1833 return lldb::ScriptInterpreterObjectSP(); 1834 } 1835 1836 if (PyErr_Occurred()) 1837 { 1838 PyErr_Clear(); 1839 } 1840 1841 Py_XDECREF(pmeth); 1842 1843 // right now we know this function exists and is callable.. 1844 PyObject* py_return = PyObject_CallMethod(implementor, callee_name, NULL); 1845 1846 // if it fails, print the error but otherwise go on 1847 if (PyErr_Occurred()) 1848 { 1849 PyErr_Print(); 1850 PyErr_Clear(); 1851 } 1852 1853 return MakeScriptObject(py_return); 1854 } 1855 1856 lldb::ScriptInterpreterObjectSP 1857 ScriptInterpreterPython::OSPlugin_ThreadsInfo (lldb::ScriptInterpreterObjectSP os_plugin_object_sp) 1858 { 1859 Locker py_lock(this,Locker::AcquireLock,Locker::FreeLock); 1860 1861 static char callee_name[] = "get_thread_info"; 1862 1863 if (!os_plugin_object_sp) 1864 return lldb::ScriptInterpreterObjectSP(); 1865 1866 PyObject* implementor = (PyObject*)os_plugin_object_sp->GetObject(); 1867 1868 if (implementor == NULL || implementor == Py_None) 1869 return lldb::ScriptInterpreterObjectSP(); 1870 1871 PyObject* pmeth = PyObject_GetAttrString(implementor, callee_name); 1872 1873 if (PyErr_Occurred()) 1874 { 1875 PyErr_Clear(); 1876 } 1877 1878 if (pmeth == NULL || pmeth == Py_None) 1879 { 1880 Py_XDECREF(pmeth); 1881 return lldb::ScriptInterpreterObjectSP(); 1882 } 1883 1884 if (PyCallable_Check(pmeth) == 0) 1885 { 1886 if (PyErr_Occurred()) 1887 { 1888 PyErr_Clear(); 1889 } 1890 1891 Py_XDECREF(pmeth); 1892 return lldb::ScriptInterpreterObjectSP(); 1893 } 1894 1895 if (PyErr_Occurred()) 1896 { 1897 PyErr_Clear(); 1898 } 1899 1900 Py_XDECREF(pmeth); 1901 1902 // right now we know this function exists and is callable.. 1903 PyObject* py_return = PyObject_CallMethod(implementor, callee_name, NULL); 1904 1905 // if it fails, print the error but otherwise go on 1906 if (PyErr_Occurred()) 1907 { 1908 PyErr_Print(); 1909 PyErr_Clear(); 1910 } 1911 1912 return MakeScriptObject(py_return); 1913 } 1914 1915 // GetPythonValueFormatString provides a system independent type safe way to 1916 // convert a variable's type into a python value format. Python value formats 1917 // are defined in terms of builtin C types and could change from system to 1918 // as the underlying typedef for uint* types, size_t, off_t and other values 1919 // change. 1920 1921 template <typename T> 1922 const char *GetPythonValueFormatString(T t) 1923 { 1924 assert(!"Unhandled type passed to GetPythonValueFormatString(T), make a specialization of GetPythonValueFormatString() to support this type."); 1925 return NULL; 1926 } 1927 template <> const char *GetPythonValueFormatString (char *) { return "s"; } 1928 template <> const char *GetPythonValueFormatString (char) { return "b"; } 1929 template <> const char *GetPythonValueFormatString (unsigned char) { return "B"; } 1930 template <> const char *GetPythonValueFormatString (short) { return "h"; } 1931 template <> const char *GetPythonValueFormatString (unsigned short) { return "H"; } 1932 template <> const char *GetPythonValueFormatString (int) { return "i"; } 1933 template <> const char *GetPythonValueFormatString (unsigned int) { return "I"; } 1934 template <> const char *GetPythonValueFormatString (long) { return "l"; } 1935 template <> const char *GetPythonValueFormatString (unsigned long) { return "k"; } 1936 template <> const char *GetPythonValueFormatString (long long) { return "L"; } 1937 template <> const char *GetPythonValueFormatString (unsigned long long) { return "K"; } 1938 template <> const char *GetPythonValueFormatString (float t) { return "f"; } 1939 template <> const char *GetPythonValueFormatString (double t) { return "d"; } 1940 1941 lldb::ScriptInterpreterObjectSP 1942 ScriptInterpreterPython::OSPlugin_RegisterContextData (lldb::ScriptInterpreterObjectSP os_plugin_object_sp, 1943 lldb::tid_t tid) 1944 { 1945 Locker py_lock(this,Locker::AcquireLock,Locker::FreeLock); 1946 1947 static char callee_name[] = "get_register_data"; 1948 static char *param_format = const_cast<char *>(GetPythonValueFormatString(tid)); 1949 1950 if (!os_plugin_object_sp) 1951 return lldb::ScriptInterpreterObjectSP(); 1952 1953 PyObject* implementor = (PyObject*)os_plugin_object_sp->GetObject(); 1954 1955 if (implementor == NULL || implementor == Py_None) 1956 return lldb::ScriptInterpreterObjectSP(); 1957 1958 PyObject* pmeth = PyObject_GetAttrString(implementor, callee_name); 1959 1960 if (PyErr_Occurred()) 1961 { 1962 PyErr_Clear(); 1963 } 1964 1965 if (pmeth == NULL || pmeth == Py_None) 1966 { 1967 Py_XDECREF(pmeth); 1968 return lldb::ScriptInterpreterObjectSP(); 1969 } 1970 1971 if (PyCallable_Check(pmeth) == 0) 1972 { 1973 if (PyErr_Occurred()) 1974 { 1975 PyErr_Clear(); 1976 } 1977 1978 Py_XDECREF(pmeth); 1979 return lldb::ScriptInterpreterObjectSP(); 1980 } 1981 1982 if (PyErr_Occurred()) 1983 { 1984 PyErr_Clear(); 1985 } 1986 1987 Py_XDECREF(pmeth); 1988 1989 // right now we know this function exists and is callable.. 1990 PyObject* py_return = PyObject_CallMethod(implementor, callee_name, param_format, tid); 1991 1992 // if it fails, print the error but otherwise go on 1993 if (PyErr_Occurred()) 1994 { 1995 PyErr_Print(); 1996 PyErr_Clear(); 1997 } 1998 1999 return MakeScriptObject(py_return); 2000 } 2001 2002 lldb::ScriptInterpreterObjectSP 2003 ScriptInterpreterPython::OSPlugin_CreateThread (lldb::ScriptInterpreterObjectSP os_plugin_object_sp, 2004 lldb::tid_t tid, 2005 lldb::addr_t context) 2006 { 2007 Locker py_lock(this,Locker::AcquireLock,Locker::FreeLock); 2008 2009 static char callee_name[] = "create_thread"; 2010 std::string param_format; 2011 param_format += GetPythonValueFormatString(tid); 2012 param_format += GetPythonValueFormatString(context); 2013 2014 if (!os_plugin_object_sp) 2015 return lldb::ScriptInterpreterObjectSP(); 2016 2017 PyObject* implementor = (PyObject*)os_plugin_object_sp->GetObject(); 2018 2019 if (implementor == NULL || implementor == Py_None) 2020 return lldb::ScriptInterpreterObjectSP(); 2021 2022 PyObject* pmeth = PyObject_GetAttrString(implementor, callee_name); 2023 2024 if (PyErr_Occurred()) 2025 { 2026 PyErr_Clear(); 2027 } 2028 2029 if (pmeth == NULL || pmeth == Py_None) 2030 { 2031 Py_XDECREF(pmeth); 2032 return lldb::ScriptInterpreterObjectSP(); 2033 } 2034 2035 if (PyCallable_Check(pmeth) == 0) 2036 { 2037 if (PyErr_Occurred()) 2038 { 2039 PyErr_Clear(); 2040 } 2041 2042 Py_XDECREF(pmeth); 2043 return lldb::ScriptInterpreterObjectSP(); 2044 } 2045 2046 if (PyErr_Occurred()) 2047 { 2048 PyErr_Clear(); 2049 } 2050 2051 Py_XDECREF(pmeth); 2052 2053 // right now we know this function exists and is callable.. 2054 PyObject* py_return = PyObject_CallMethod(implementor, callee_name, ¶m_format[0], tid, context); 2055 2056 // if it fails, print the error but otherwise go on 2057 if (PyErr_Occurred()) 2058 { 2059 PyErr_Print(); 2060 PyErr_Clear(); 2061 } 2062 2063 return MakeScriptObject(py_return); 2064 } 2065 2066 lldb::ScriptInterpreterObjectSP 2067 ScriptInterpreterPython::CreateSyntheticScriptedProvider (const char *class_name, 2068 lldb::ValueObjectSP valobj) 2069 { 2070 if (class_name == NULL || class_name[0] == '\0') 2071 return lldb::ScriptInterpreterObjectSP(); 2072 2073 if (!valobj.get()) 2074 return lldb::ScriptInterpreterObjectSP(); 2075 2076 ExecutionContext exe_ctx (valobj->GetExecutionContextRef()); 2077 Target *target = exe_ctx.GetTargetPtr(); 2078 2079 if (!target) 2080 return lldb::ScriptInterpreterObjectSP(); 2081 2082 Debugger &debugger = target->GetDebugger(); 2083 ScriptInterpreter *script_interpreter = debugger.GetCommandInterpreter().GetScriptInterpreter(); 2084 ScriptInterpreterPython *python_interpreter = (ScriptInterpreterPython *) script_interpreter; 2085 2086 if (!script_interpreter) 2087 return lldb::ScriptInterpreterObjectSP(); 2088 2089 void* ret_val; 2090 2091 { 2092 Locker py_lock(this); 2093 ret_val = g_swig_synthetic_script (class_name, 2094 python_interpreter->m_dictionary_name.c_str(), 2095 valobj); 2096 } 2097 2098 return MakeScriptObject(ret_val); 2099 } 2100 2101 bool 2102 ScriptInterpreterPython::GenerateTypeScriptFunction (const char* oneliner, std::string& output, void* name_token) 2103 { 2104 StringList input; 2105 input.SplitIntoLines(oneliner, strlen(oneliner)); 2106 return GenerateTypeScriptFunction(input, output, name_token); 2107 } 2108 2109 bool 2110 ScriptInterpreterPython::GenerateTypeSynthClass (const char* oneliner, std::string& output, void* name_token) 2111 { 2112 StringList input; 2113 input.SplitIntoLines(oneliner, strlen(oneliner)); 2114 return GenerateTypeSynthClass(input, output, name_token); 2115 } 2116 2117 2118 bool 2119 ScriptInterpreterPython::GenerateBreakpointCommandCallbackData (StringList &user_input, std::string& output) 2120 { 2121 static uint32_t num_created_functions = 0; 2122 user_input.RemoveBlankLines (); 2123 StreamString sstr; 2124 2125 if (user_input.GetSize() == 0) 2126 return false; 2127 2128 std::string auto_generated_function_name(GenerateUniqueName("lldb_autogen_python_bp_callback_func_",num_created_functions)); 2129 sstr.Printf ("def %s (frame, bp_loc, internal_dict):", auto_generated_function_name.c_str()); 2130 2131 if (!GenerateFunction(sstr.GetData(), user_input)) 2132 return false; 2133 2134 // Store the name of the auto-generated function to be called. 2135 output.assign(auto_generated_function_name); 2136 return true; 2137 } 2138 2139 bool 2140 ScriptInterpreterPython::GenerateWatchpointCommandCallbackData (StringList &user_input, std::string& output) 2141 { 2142 static uint32_t num_created_functions = 0; 2143 user_input.RemoveBlankLines (); 2144 StreamString sstr; 2145 2146 if (user_input.GetSize() == 0) 2147 return false; 2148 2149 std::string auto_generated_function_name(GenerateUniqueName("lldb_autogen_python_wp_callback_func_",num_created_functions)); 2150 sstr.Printf ("def %s (frame, wp, internal_dict):", auto_generated_function_name.c_str()); 2151 2152 if (!GenerateFunction(sstr.GetData(), user_input)) 2153 return false; 2154 2155 // Store the name of the auto-generated function to be called. 2156 output.assign(auto_generated_function_name); 2157 return true; 2158 } 2159 2160 bool 2161 ScriptInterpreterPython::GetScriptedSummary (const char *python_function_name, 2162 lldb::ValueObjectSP valobj, 2163 lldb::ScriptInterpreterObjectSP& callee_wrapper_sp, 2164 std::string& retval) 2165 { 2166 2167 Timer scoped_timer (__PRETTY_FUNCTION__, __PRETTY_FUNCTION__); 2168 2169 if (!valobj.get()) 2170 { 2171 retval.assign("<no object>"); 2172 return false; 2173 } 2174 2175 void* old_callee = (callee_wrapper_sp ? callee_wrapper_sp->GetObject() : NULL); 2176 void* new_callee = old_callee; 2177 2178 bool ret_val; 2179 if (python_function_name 2180 && *python_function_name) 2181 { 2182 { 2183 Locker py_lock(this); 2184 { 2185 Timer scoped_timer ("g_swig_typescript_callback","g_swig_typescript_callback"); 2186 ret_val = g_swig_typescript_callback (python_function_name, 2187 FindSessionDictionary(m_dictionary_name.c_str()), 2188 valobj, 2189 &new_callee, 2190 retval); 2191 } 2192 } 2193 } 2194 else 2195 { 2196 retval.assign("<no function name>"); 2197 return false; 2198 } 2199 2200 if (new_callee && old_callee != new_callee) 2201 callee_wrapper_sp = MakeScriptObject(new_callee); 2202 2203 return ret_val; 2204 2205 } 2206 2207 bool 2208 ScriptInterpreterPython::BreakpointCallbackFunction 2209 ( 2210 void *baton, 2211 StoppointCallbackContext *context, 2212 user_id_t break_id, 2213 user_id_t break_loc_id 2214 ) 2215 { 2216 BreakpointOptions::CommandData *bp_option_data = (BreakpointOptions::CommandData *) baton; 2217 const char *python_function_name = bp_option_data->script_source.c_str(); 2218 2219 if (!context) 2220 return true; 2221 2222 ExecutionContext exe_ctx (context->exe_ctx_ref); 2223 Target *target = exe_ctx.GetTargetPtr(); 2224 2225 if (!target) 2226 return true; 2227 2228 Debugger &debugger = target->GetDebugger(); 2229 ScriptInterpreter *script_interpreter = debugger.GetCommandInterpreter().GetScriptInterpreter(); 2230 ScriptInterpreterPython *python_interpreter = (ScriptInterpreterPython *) script_interpreter; 2231 2232 if (!script_interpreter) 2233 return true; 2234 2235 if (python_function_name != NULL 2236 && python_function_name[0] != '\0') 2237 { 2238 const StackFrameSP stop_frame_sp (exe_ctx.GetFrameSP()); 2239 BreakpointSP breakpoint_sp = target->GetBreakpointByID (break_id); 2240 if (breakpoint_sp) 2241 { 2242 const BreakpointLocationSP bp_loc_sp (breakpoint_sp->FindLocationByID (break_loc_id)); 2243 2244 if (stop_frame_sp && bp_loc_sp) 2245 { 2246 bool ret_val = true; 2247 { 2248 Locker py_lock(python_interpreter); 2249 ret_val = g_swig_breakpoint_callback (python_function_name, 2250 python_interpreter->m_dictionary_name.c_str(), 2251 stop_frame_sp, 2252 bp_loc_sp); 2253 } 2254 return ret_val; 2255 } 2256 } 2257 } 2258 // We currently always true so we stop in case anything goes wrong when 2259 // trying to call the script function 2260 return true; 2261 } 2262 2263 bool 2264 ScriptInterpreterPython::WatchpointCallbackFunction 2265 ( 2266 void *baton, 2267 StoppointCallbackContext *context, 2268 user_id_t watch_id 2269 ) 2270 { 2271 WatchpointOptions::CommandData *wp_option_data = (WatchpointOptions::CommandData *) baton; 2272 const char *python_function_name = wp_option_data->script_source.c_str(); 2273 2274 if (!context) 2275 return true; 2276 2277 ExecutionContext exe_ctx (context->exe_ctx_ref); 2278 Target *target = exe_ctx.GetTargetPtr(); 2279 2280 if (!target) 2281 return true; 2282 2283 Debugger &debugger = target->GetDebugger(); 2284 ScriptInterpreter *script_interpreter = debugger.GetCommandInterpreter().GetScriptInterpreter(); 2285 ScriptInterpreterPython *python_interpreter = (ScriptInterpreterPython *) script_interpreter; 2286 2287 if (!script_interpreter) 2288 return true; 2289 2290 if (python_function_name != NULL 2291 && python_function_name[0] != '\0') 2292 { 2293 const StackFrameSP stop_frame_sp (exe_ctx.GetFrameSP()); 2294 WatchpointSP wp_sp = target->GetWatchpointList().FindByID (watch_id); 2295 if (wp_sp) 2296 { 2297 if (stop_frame_sp && wp_sp) 2298 { 2299 bool ret_val = true; 2300 { 2301 Locker py_lock(python_interpreter); 2302 ret_val = g_swig_watchpoint_callback (python_function_name, 2303 python_interpreter->m_dictionary_name.c_str(), 2304 stop_frame_sp, 2305 wp_sp); 2306 } 2307 return ret_val; 2308 } 2309 } 2310 } 2311 // We currently always true so we stop in case anything goes wrong when 2312 // trying to call the script function 2313 return true; 2314 } 2315 2316 lldb::thread_result_t 2317 ScriptInterpreterPython::RunEmbeddedPythonInterpreter (lldb::thread_arg_t baton) 2318 { 2319 ScriptInterpreterPython *script_interpreter = (ScriptInterpreterPython *) baton; 2320 2321 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SCRIPT)); 2322 2323 if (log) 2324 log->Printf ("%p ScriptInterpreterPython::RunEmbeddedPythonInterpreter () thread starting...", baton); 2325 2326 char error_str[1024]; 2327 const char *pty_slave_name = script_interpreter->m_embedded_python_pty.GetSlaveName (error_str, sizeof (error_str)); 2328 2329 if (pty_slave_name != NULL) 2330 { 2331 StreamString run_string; 2332 2333 // Ensure we have the GIL before running any Python code. 2334 // Since we're only running a few one-liners and then dropping to the interpreter (which will release the GIL when needed), 2335 // we can just release the GIL after finishing our work. 2336 // If finer-grained locking is desirable, we can lock and unlock the GIL only when calling a python function. 2337 Locker locker(script_interpreter, 2338 ScriptInterpreterPython::Locker::AcquireLock | ScriptInterpreterPython::Locker::InitSession | ScriptInterpreterPython::Locker::InitGlobals, 2339 ScriptInterpreterPython::Locker::FreeAcquiredLock | ScriptInterpreterPython::Locker::TearDownSession); 2340 2341 run_string.Printf ("run_one_line (%s, 'save_stderr = sys.stderr')", script_interpreter->m_dictionary_name.c_str()); 2342 PyRun_SimpleString (run_string.GetData()); 2343 run_string.Clear (); 2344 2345 run_string.Printf ("run_one_line (%s, 'sys.stderr = sys.stdout')", script_interpreter->m_dictionary_name.c_str()); 2346 PyRun_SimpleString (run_string.GetData()); 2347 run_string.Clear (); 2348 2349 run_string.Printf ("run_one_line (%s, 'save_stdin = sys.stdin')", script_interpreter->m_dictionary_name.c_str()); 2350 PyRun_SimpleString (run_string.GetData()); 2351 run_string.Clear (); 2352 2353 run_string.Printf ("run_one_line (%s, \"sys.stdin = open ('%s', 'r')\")", script_interpreter->m_dictionary_name.c_str(), 2354 pty_slave_name); 2355 PyRun_SimpleString (run_string.GetData()); 2356 run_string.Clear (); 2357 2358 // The following call drops into the embedded interpreter loop and stays there until the 2359 // user chooses to exit from the Python interpreter. 2360 // This embedded interpreter will, as any Python code that performs I/O, unlock the GIL before 2361 // a system call that can hang, and lock it when the syscall has returned. 2362 2363 // We need to surround the call to the embedded interpreter with calls to PyGILState_Ensure and 2364 // PyGILState_Release (using the Locker above). This is because Python has a global lock which must be held whenever we want 2365 // to touch any Python objects. Otherwise, if the user calls Python code, the interpreter state will be off, 2366 // and things could hang (it's happened before). 2367 2368 run_string.Printf ("run_python_interpreter (%s)", script_interpreter->m_dictionary_name.c_str()); 2369 PyRun_SimpleString (run_string.GetData()); 2370 run_string.Clear (); 2371 2372 run_string.Printf ("run_one_line (%s, 'sys.stdin = save_stdin')", script_interpreter->m_dictionary_name.c_str()); 2373 PyRun_SimpleString (run_string.GetData()); 2374 run_string.Clear(); 2375 2376 run_string.Printf ("run_one_line (%s, 'sys.stderr = save_stderr')", script_interpreter->m_dictionary_name.c_str()); 2377 PyRun_SimpleString (run_string.GetData()); 2378 run_string.Clear(); 2379 } 2380 2381 if (script_interpreter->m_embedded_python_input_reader_sp) 2382 script_interpreter->m_embedded_python_input_reader_sp->SetIsDone (true); 2383 2384 script_interpreter->m_embedded_python_pty.CloseSlaveFileDescriptor(); 2385 2386 log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SCRIPT); 2387 if (log) 2388 log->Printf ("%p ScriptInterpreterPython::RunEmbeddedPythonInterpreter () thread exiting...", baton); 2389 2390 2391 // Clean up the input reader and make the debugger pop it off the stack. 2392 Debugger &debugger = script_interpreter->GetCommandInterpreter().GetDebugger(); 2393 const InputReaderSP reader_sp = script_interpreter->m_embedded_python_input_reader_sp; 2394 if (reader_sp) 2395 { 2396 debugger.PopInputReader (reader_sp); 2397 script_interpreter->m_embedded_python_input_reader_sp.reset(); 2398 } 2399 2400 return NULL; 2401 } 2402 2403 lldb::thread_result_t 2404 ScriptInterpreterPython::PythonInputReaderManager::RunPythonInputReader (lldb::thread_arg_t baton) 2405 { 2406 ScriptInterpreterPython *script_interpreter = (ScriptInterpreterPython *) baton; 2407 2408 const InputReaderSP reader_sp = script_interpreter->m_embedded_thread_input_reader_sp; 2409 2410 if (reader_sp) 2411 reader_sp->WaitOnReaderIsDone(); 2412 2413 return NULL; 2414 } 2415 2416 size_t 2417 ScriptInterpreterPython::CalculateNumChildren (const lldb::ScriptInterpreterObjectSP& implementor_sp) 2418 { 2419 if (!implementor_sp) 2420 return 0; 2421 2422 void* implementor = implementor_sp->GetObject(); 2423 2424 if (!implementor) 2425 return 0; 2426 2427 if (!g_swig_calc_children) 2428 return 0; 2429 2430 uint32_t ret_val = 0; 2431 2432 { 2433 Locker py_lock(this); 2434 ret_val = g_swig_calc_children (implementor); 2435 } 2436 2437 return ret_val; 2438 } 2439 2440 lldb::ValueObjectSP 2441 ScriptInterpreterPython::GetChildAtIndex (const lldb::ScriptInterpreterObjectSP& implementor_sp, uint32_t idx) 2442 { 2443 if (!implementor_sp) 2444 return lldb::ValueObjectSP(); 2445 2446 void* implementor = implementor_sp->GetObject(); 2447 2448 if (!implementor) 2449 return lldb::ValueObjectSP(); 2450 2451 if (!g_swig_get_child_index || !g_swig_cast_to_sbvalue) 2452 return lldb::ValueObjectSP(); 2453 2454 void* child_ptr = NULL; 2455 lldb::SBValue* value_sb = NULL; 2456 lldb::ValueObjectSP ret_val; 2457 2458 { 2459 Locker py_lock(this); 2460 child_ptr = g_swig_get_child_index (implementor,idx); 2461 if (child_ptr != NULL && child_ptr != Py_None) 2462 { 2463 value_sb = (lldb::SBValue*)g_swig_cast_to_sbvalue(child_ptr); 2464 if (value_sb == NULL) 2465 Py_XDECREF(child_ptr); 2466 else 2467 ret_val = value_sb->GetSP(); 2468 } 2469 else 2470 { 2471 Py_XDECREF(child_ptr); 2472 } 2473 } 2474 2475 return ret_val; 2476 } 2477 2478 int 2479 ScriptInterpreterPython::GetIndexOfChildWithName (const lldb::ScriptInterpreterObjectSP& implementor_sp, const char* child_name) 2480 { 2481 if (!implementor_sp) 2482 return UINT32_MAX; 2483 2484 void* implementor = implementor_sp->GetObject(); 2485 2486 if (!implementor) 2487 return UINT32_MAX; 2488 2489 if (!g_swig_get_index_child) 2490 return UINT32_MAX; 2491 2492 int ret_val = UINT32_MAX; 2493 2494 { 2495 Locker py_lock(this); 2496 ret_val = g_swig_get_index_child (implementor, child_name); 2497 } 2498 2499 return ret_val; 2500 } 2501 2502 bool 2503 ScriptInterpreterPython::UpdateSynthProviderInstance (const lldb::ScriptInterpreterObjectSP& implementor_sp) 2504 { 2505 bool ret_val = false; 2506 2507 if (!implementor_sp) 2508 return ret_val; 2509 2510 void* implementor = implementor_sp->GetObject(); 2511 2512 if (!implementor) 2513 return ret_val; 2514 2515 if (!g_swig_update_provider) 2516 return ret_val; 2517 2518 { 2519 Locker py_lock(this); 2520 ret_val = g_swig_update_provider (implementor); 2521 } 2522 2523 return ret_val; 2524 } 2525 2526 bool 2527 ScriptInterpreterPython::MightHaveChildrenSynthProviderInstance (const lldb::ScriptInterpreterObjectSP& implementor_sp) 2528 { 2529 bool ret_val = false; 2530 2531 if (!implementor_sp) 2532 return ret_val; 2533 2534 void* implementor = implementor_sp->GetObject(); 2535 2536 if (!implementor) 2537 return ret_val; 2538 2539 if (!g_swig_mighthavechildren_provider) 2540 return ret_val; 2541 2542 { 2543 Locker py_lock(this); 2544 ret_val = g_swig_mighthavechildren_provider (implementor); 2545 } 2546 2547 return ret_val; 2548 } 2549 2550 static std::string 2551 ReadPythonBacktrace (PyObject* py_backtrace) 2552 { 2553 PyObject* traceback_module = NULL, 2554 *stringIO_module = NULL, 2555 *stringIO_builder = NULL, 2556 *stringIO_buffer = NULL, 2557 *printTB = NULL, 2558 *printTB_args = NULL, 2559 *printTB_result = NULL, 2560 *stringIO_getvalue = NULL, 2561 *printTB_string = NULL; 2562 2563 std::string retval("backtrace unavailable"); 2564 2565 if (py_backtrace && py_backtrace != Py_None) 2566 { 2567 traceback_module = PyImport_ImportModule("traceback"); 2568 stringIO_module = PyImport_ImportModule("StringIO"); 2569 2570 if (traceback_module && traceback_module != Py_None && stringIO_module && stringIO_module != Py_None) 2571 { 2572 stringIO_builder = PyObject_GetAttrString(stringIO_module, "StringIO"); 2573 if (stringIO_builder && stringIO_builder != Py_None) 2574 { 2575 stringIO_buffer = PyObject_CallObject(stringIO_builder, NULL); 2576 if (stringIO_buffer && stringIO_buffer != Py_None) 2577 { 2578 printTB = PyObject_GetAttrString(traceback_module, "print_tb"); 2579 if (printTB && printTB != Py_None) 2580 { 2581 printTB_args = Py_BuildValue("OOO",py_backtrace,Py_None,stringIO_buffer); 2582 printTB_result = PyObject_CallObject(printTB, printTB_args); 2583 stringIO_getvalue = PyObject_GetAttrString(stringIO_buffer, "getvalue"); 2584 if (stringIO_getvalue && stringIO_getvalue != Py_None) 2585 { 2586 printTB_string = PyObject_CallObject (stringIO_getvalue,NULL); 2587 if (printTB_string && printTB_string != Py_None && PyString_Check(printTB_string)) 2588 retval.assign(PyString_AsString(printTB_string)); 2589 } 2590 } 2591 } 2592 } 2593 } 2594 } 2595 Py_XDECREF(traceback_module); 2596 Py_XDECREF(stringIO_module); 2597 Py_XDECREF(stringIO_builder); 2598 Py_XDECREF(stringIO_buffer); 2599 Py_XDECREF(printTB); 2600 Py_XDECREF(printTB_args); 2601 Py_XDECREF(printTB_result); 2602 Py_XDECREF(stringIO_getvalue); 2603 Py_XDECREF(printTB_string); 2604 return retval; 2605 } 2606 2607 bool 2608 ScriptInterpreterPython::RunScriptFormatKeyword (const char* impl_function, 2609 Process* process, 2610 std::string& output, 2611 Error& error) 2612 { 2613 bool ret_val; 2614 if (!process) 2615 { 2616 error.SetErrorString("no process"); 2617 return false; 2618 } 2619 if (!impl_function || !impl_function[0]) 2620 { 2621 error.SetErrorString("no function to execute"); 2622 return false; 2623 } 2624 if (!g_swig_run_script_keyword_process) 2625 { 2626 error.SetErrorString("internal helper function missing"); 2627 return false; 2628 } 2629 { 2630 ProcessSP process_sp(process->shared_from_this()); 2631 Locker py_lock(this); 2632 ret_val = g_swig_run_script_keyword_process (impl_function, m_dictionary_name.c_str(), process_sp, output); 2633 if (!ret_val) 2634 error.SetErrorString("python script evaluation failed"); 2635 } 2636 return ret_val; 2637 } 2638 2639 bool 2640 ScriptInterpreterPython::RunScriptFormatKeyword (const char* impl_function, 2641 Thread* thread, 2642 std::string& output, 2643 Error& error) 2644 { 2645 bool ret_val; 2646 if (!thread) 2647 { 2648 error.SetErrorString("no thread"); 2649 return false; 2650 } 2651 if (!impl_function || !impl_function[0]) 2652 { 2653 error.SetErrorString("no function to execute"); 2654 return false; 2655 } 2656 if (!g_swig_run_script_keyword_thread) 2657 { 2658 error.SetErrorString("internal helper function missing"); 2659 return false; 2660 } 2661 { 2662 ThreadSP thread_sp(thread->shared_from_this()); 2663 Locker py_lock(this); 2664 ret_val = g_swig_run_script_keyword_thread (impl_function, m_dictionary_name.c_str(), thread_sp, output); 2665 if (!ret_val) 2666 error.SetErrorString("python script evaluation failed"); 2667 } 2668 return ret_val; 2669 } 2670 2671 bool 2672 ScriptInterpreterPython::RunScriptFormatKeyword (const char* impl_function, 2673 Target* target, 2674 std::string& output, 2675 Error& error) 2676 { 2677 bool ret_val; 2678 if (!target) 2679 { 2680 error.SetErrorString("no thread"); 2681 return false; 2682 } 2683 if (!impl_function || !impl_function[0]) 2684 { 2685 error.SetErrorString("no function to execute"); 2686 return false; 2687 } 2688 if (!g_swig_run_script_keyword_target) 2689 { 2690 error.SetErrorString("internal helper function missing"); 2691 return false; 2692 } 2693 { 2694 TargetSP target_sp(target->shared_from_this()); 2695 Locker py_lock(this); 2696 ret_val = g_swig_run_script_keyword_target (impl_function, m_dictionary_name.c_str(), target_sp, output); 2697 if (!ret_val) 2698 error.SetErrorString("python script evaluation failed"); 2699 } 2700 return ret_val; 2701 } 2702 2703 bool 2704 ScriptInterpreterPython::RunScriptFormatKeyword (const char* impl_function, 2705 StackFrame* frame, 2706 std::string& output, 2707 Error& error) 2708 { 2709 bool ret_val; 2710 if (!frame) 2711 { 2712 error.SetErrorString("no frame"); 2713 return false; 2714 } 2715 if (!impl_function || !impl_function[0]) 2716 { 2717 error.SetErrorString("no function to execute"); 2718 return false; 2719 } 2720 if (!g_swig_run_script_keyword_frame) 2721 { 2722 error.SetErrorString("internal helper function missing"); 2723 return false; 2724 } 2725 { 2726 StackFrameSP frame_sp(frame->shared_from_this()); 2727 Locker py_lock(this); 2728 ret_val = g_swig_run_script_keyword_frame (impl_function, m_dictionary_name.c_str(), frame_sp, output); 2729 if (!ret_val) 2730 error.SetErrorString("python script evaluation failed"); 2731 } 2732 return ret_val; 2733 } 2734 2735 uint64_t replace_all(std::string& str, const std::string& oldStr, const std::string& newStr) 2736 { 2737 size_t pos = 0; 2738 uint64_t matches = 0; 2739 while((pos = str.find(oldStr, pos)) != std::string::npos) 2740 { 2741 matches++; 2742 str.replace(pos, oldStr.length(), newStr); 2743 pos += newStr.length(); 2744 } 2745 return matches; 2746 } 2747 2748 bool 2749 ScriptInterpreterPython::LoadScriptingModule (const char* pathname, 2750 bool can_reload, 2751 bool init_session, 2752 lldb_private::Error& error) 2753 { 2754 if (!pathname || !pathname[0]) 2755 { 2756 error.SetErrorString("invalid pathname"); 2757 return false; 2758 } 2759 2760 if (!g_swig_call_module_init) 2761 { 2762 error.SetErrorString("internal helper function missing"); 2763 return false; 2764 } 2765 2766 lldb::DebuggerSP debugger_sp = m_interpreter.GetDebugger().shared_from_this(); 2767 2768 { 2769 FileSpec target_file(pathname, true); 2770 std::string basename(target_file.GetFilename().GetCString()); 2771 2772 StreamString command_stream; 2773 2774 // Before executing Pyton code, lock the GIL. 2775 Locker py_lock (this, 2776 Locker::AcquireLock | (init_session ? Locker::InitSession : 0), 2777 Locker::FreeAcquiredLock | (init_session ? Locker::TearDownSession : 0)); 2778 2779 if (target_file.GetFileType() == FileSpec::eFileTypeInvalid || 2780 target_file.GetFileType() == FileSpec::eFileTypeUnknown) 2781 { 2782 // if not a valid file of any sort, check if it might be a filename still 2783 // dot can't be used but / and \ can, and if either is found, reject 2784 if (strchr(pathname,'\\') || strchr(pathname,'/')) 2785 { 2786 error.SetErrorString("invalid pathname"); 2787 return false; 2788 } 2789 basename = pathname; // not a filename, probably a package of some sort, let it go through 2790 } 2791 else if (target_file.GetFileType() == FileSpec::eFileTypeDirectory || 2792 target_file.GetFileType() == FileSpec::eFileTypeRegular || 2793 target_file.GetFileType() == FileSpec::eFileTypeSymbolicLink) 2794 { 2795 std::string directory(target_file.GetDirectory().GetCString()); 2796 replace_all(directory,"'","\\'"); 2797 2798 // now make sure that Python has "directory" in the search path 2799 StreamString command_stream; 2800 command_stream.Printf("if not (sys.path.__contains__('%s')):\n sys.path.insert(1,'%s');\n\n", 2801 directory.c_str(), 2802 directory.c_str()); 2803 bool syspath_retval = ExecuteMultipleLines(command_stream.GetData(), ScriptInterpreter::ExecuteScriptOptions().SetEnableIO(false).SetSetLLDBGlobals(false)); 2804 if (!syspath_retval) 2805 { 2806 error.SetErrorString("Python sys.path handling failed"); 2807 return false; 2808 } 2809 2810 // strip .py or .pyc extension 2811 ConstString extension = target_file.GetFileNameExtension(); 2812 if (extension) 2813 { 2814 if (::strcmp(extension.GetCString(), "py") == 0) 2815 basename.resize(basename.length()-3); 2816 else if(::strcmp(extension.GetCString(), "pyc") == 0) 2817 basename.resize(basename.length()-4); 2818 } 2819 } 2820 else 2821 { 2822 error.SetErrorString("no known way to import this module specification"); 2823 return false; 2824 } 2825 2826 // check if the module is already import-ed 2827 command_stream.Clear(); 2828 command_stream.Printf("sys.modules.__contains__('%s')",basename.c_str()); 2829 bool does_contain = false; 2830 int refcount = 0; 2831 // this call will succeed if the module was ever imported in any Debugger in the lifetime of the process 2832 // in which this LLDB framework is living 2833 bool was_imported_globally = (ExecuteOneLineWithReturn(command_stream.GetData(), 2834 ScriptInterpreterPython::eScriptReturnTypeBool, 2835 &does_contain, 2836 ScriptInterpreter::ExecuteScriptOptions().SetEnableIO(false).SetSetLLDBGlobals(false)) && does_contain); 2837 // this call will fail if the module was not imported in this Debugger before 2838 command_stream.Clear(); 2839 command_stream.Printf("sys.getrefcount(%s)",basename.c_str()); 2840 bool was_imported_locally = (ExecuteOneLineWithReturn(command_stream.GetData(), 2841 ScriptInterpreterPython::eScriptReturnTypeInt, 2842 &refcount, 2843 ScriptInterpreter::ExecuteScriptOptions().SetEnableIO(false).SetSetLLDBGlobals(false)) && refcount > 0); 2844 2845 bool was_imported = (was_imported_globally || was_imported_locally); 2846 2847 if (was_imported == true && can_reload == false) 2848 { 2849 error.SetErrorString("module already imported"); 2850 return false; 2851 } 2852 2853 // now actually do the import 2854 command_stream.Clear(); 2855 2856 if (was_imported) 2857 { 2858 if (!was_imported_locally) 2859 command_stream.Printf("import %s ; reload(%s)",basename.c_str(),basename.c_str()); 2860 else 2861 command_stream.Printf("reload(%s)",basename.c_str()); 2862 } 2863 else 2864 command_stream.Printf("import %s",basename.c_str()); 2865 2866 bool import_retval = ExecuteMultipleLines(command_stream.GetData(), ScriptInterpreter::ExecuteScriptOptions().SetEnableIO(false).SetSetLLDBGlobals(false).SetMaskoutErrors(false)); 2867 PyObject* py_error = PyErr_Occurred(); // per Python docs: "you do not need to Py_DECREF()" the return of this function 2868 2869 if (py_error || !import_retval) // check for failure of the import 2870 { 2871 if (py_error) // if we have a Python error.. 2872 { 2873 PyObject *type = NULL,*value = NULL,*traceback = NULL; 2874 PyErr_Fetch (&type,&value,&traceback); 2875 2876 if (PyErr_GivenExceptionMatches (py_error, PyExc_ImportError)) // and it is an ImportError 2877 { 2878 if (value && value != Py_None) 2879 error.SetErrorString(PyString_AsString(PyObject_Str(value))); 2880 else 2881 error.SetErrorString("ImportError raised by imported module"); 2882 } 2883 else // any other error 2884 { 2885 // get the backtrace 2886 std::string bt = ReadPythonBacktrace(traceback); 2887 2888 if (value && value != Py_None) 2889 error.SetErrorStringWithFormat("Python error raised while importing module: %s - traceback: %s", PyString_AsString(PyObject_Str(value)),bt.c_str()); 2890 else 2891 error.SetErrorStringWithFormat("Python raised an error while importing module - traceback: %s",bt.c_str()); 2892 } 2893 2894 Py_XDECREF(type); 2895 Py_XDECREF(value); 2896 Py_XDECREF(traceback); 2897 } 2898 else // we failed but have no error to explain why 2899 { 2900 error.SetErrorString("unknown error while importing module"); 2901 } 2902 2903 // anyway, clear the error indicator and return false 2904 PyErr_Clear(); 2905 return false; 2906 } 2907 2908 // if we are here, everything worked 2909 // call __lldb_init_module(debugger,dict) 2910 if (!g_swig_call_module_init (basename.c_str(), 2911 m_dictionary_name.c_str(), 2912 debugger_sp)) 2913 { 2914 error.SetErrorString("calling __lldb_init_module failed"); 2915 return false; 2916 } 2917 return true; 2918 } 2919 } 2920 2921 lldb::ScriptInterpreterObjectSP 2922 ScriptInterpreterPython::MakeScriptObject (void* object) 2923 { 2924 return lldb::ScriptInterpreterObjectSP(new ScriptInterpreterPythonObject(object)); 2925 } 2926 2927 ScriptInterpreterPython::SynchronicityHandler::SynchronicityHandler (lldb::DebuggerSP debugger_sp, 2928 ScriptedCommandSynchronicity synchro) : 2929 m_debugger_sp(debugger_sp), 2930 m_synch_wanted(synchro), 2931 m_old_asynch(debugger_sp->GetAsyncExecution()) 2932 { 2933 if (m_synch_wanted == eScriptedCommandSynchronicitySynchronous) 2934 m_debugger_sp->SetAsyncExecution(false); 2935 else if (m_synch_wanted == eScriptedCommandSynchronicityAsynchronous) 2936 m_debugger_sp->SetAsyncExecution(true); 2937 } 2938 2939 ScriptInterpreterPython::SynchronicityHandler::~SynchronicityHandler() 2940 { 2941 if (m_synch_wanted != eScriptedCommandSynchronicityCurrentValue) 2942 m_debugger_sp->SetAsyncExecution(m_old_asynch); 2943 } 2944 2945 bool 2946 ScriptInterpreterPython::RunScriptBasedCommand(const char* impl_function, 2947 const char* args, 2948 ScriptedCommandSynchronicity synchronicity, 2949 lldb_private::CommandReturnObject& cmd_retobj, 2950 Error& error) 2951 { 2952 if (!impl_function) 2953 { 2954 error.SetErrorString("no function to execute"); 2955 return false; 2956 } 2957 2958 if (!g_swig_call_command) 2959 { 2960 error.SetErrorString("no helper function to run scripted commands"); 2961 return false; 2962 } 2963 2964 lldb::DebuggerSP debugger_sp = m_interpreter.GetDebugger().shared_from_this(); 2965 2966 if (!debugger_sp.get()) 2967 { 2968 error.SetErrorString("invalid Debugger pointer"); 2969 return false; 2970 } 2971 2972 bool ret_val = false; 2973 2974 std::string err_msg; 2975 2976 { 2977 Locker py_lock(this, 2978 Locker::AcquireLock | Locker::InitSession, 2979 Locker::FreeLock | Locker::TearDownSession); 2980 2981 SynchronicityHandler synch_handler(debugger_sp, 2982 synchronicity); 2983 2984 // we need to save the thread state when we first start the command 2985 // because we might decide to interrupt it while some action is taking 2986 // place outside of Python (e.g. printing to screen, waiting for the network, ...) 2987 // in that case, _PyThreadState_Current will be NULL - and we would be unable 2988 // to set the asynchronous exception - not a desirable situation 2989 m_command_thread_state = _PyThreadState_Current; 2990 2991 PythonInputReaderManager py_input(this); 2992 2993 ret_val = g_swig_call_command (impl_function, 2994 m_dictionary_name.c_str(), 2995 debugger_sp, 2996 args, 2997 cmd_retobj); 2998 } 2999 3000 if (!ret_val) 3001 error.SetErrorString("unable to execute script function"); 3002 else 3003 error.Clear(); 3004 3005 return ret_val; 3006 } 3007 3008 // in Python, a special attribute __doc__ contains the docstring 3009 // for an object (function, method, class, ...) if any is defined 3010 // Otherwise, the attribute's value is None 3011 bool 3012 ScriptInterpreterPython::GetDocumentationForItem(const char* item, std::string& dest) 3013 { 3014 dest.clear(); 3015 if (!item || !*item) 3016 return false; 3017 std::string command(item); 3018 command += ".__doc__"; 3019 3020 char* result_ptr = NULL; // Python is going to point this to valid data if ExecuteOneLineWithReturn returns successfully 3021 3022 if (ExecuteOneLineWithReturn (command.c_str(), 3023 ScriptInterpreter::eScriptReturnTypeCharStrOrNone, 3024 &result_ptr, 3025 ScriptInterpreter::ExecuteScriptOptions().SetEnableIO(false))) 3026 { 3027 if (result_ptr) 3028 dest.assign(result_ptr); 3029 return true; 3030 } 3031 else 3032 { 3033 StreamString str_stream; 3034 str_stream.Printf("Function %s was not found. Containing module might be missing.",item); 3035 dest.assign(str_stream.GetData()); 3036 return false; 3037 } 3038 } 3039 3040 std::unique_ptr<ScriptInterpreterLocker> 3041 ScriptInterpreterPython::AcquireInterpreterLock () 3042 { 3043 std::unique_ptr<ScriptInterpreterLocker> py_lock(new Locker(this, 3044 Locker::AcquireLock | Locker::InitSession, 3045 Locker::FreeLock | Locker::TearDownSession)); 3046 return py_lock; 3047 } 3048 3049 void 3050 ScriptInterpreterPython::InitializeInterpreter (SWIGInitCallback python_swig_init_callback) 3051 { 3052 g_swig_init_callback = python_swig_init_callback; 3053 g_swig_breakpoint_callback = LLDBSwigPythonBreakpointCallbackFunction; 3054 g_swig_watchpoint_callback = LLDBSwigPythonWatchpointCallbackFunction; 3055 g_swig_typescript_callback = LLDBSwigPythonCallTypeScript; 3056 g_swig_synthetic_script = LLDBSwigPythonCreateSyntheticProvider; 3057 g_swig_calc_children = LLDBSwigPython_CalculateNumChildren; 3058 g_swig_get_child_index = LLDBSwigPython_GetChildAtIndex; 3059 g_swig_get_index_child = LLDBSwigPython_GetIndexOfChildWithName; 3060 g_swig_cast_to_sbvalue = LLDBSWIGPython_CastPyObjectToSBValue; 3061 g_swig_update_provider = LLDBSwigPython_UpdateSynthProviderInstance; 3062 g_swig_mighthavechildren_provider = LLDBSwigPython_MightHaveChildrenSynthProviderInstance; 3063 g_swig_call_command = LLDBSwigPythonCallCommand; 3064 g_swig_call_module_init = LLDBSwigPythonCallModuleInit; 3065 g_swig_create_os_plugin = LLDBSWIGPythonCreateOSPlugin; 3066 g_swig_run_script_keyword_process = LLDBSWIGPythonRunScriptKeywordProcess; 3067 g_swig_run_script_keyword_thread = LLDBSWIGPythonRunScriptKeywordThread; 3068 g_swig_run_script_keyword_target = LLDBSWIGPythonRunScriptKeywordTarget; 3069 g_swig_run_script_keyword_frame = LLDBSWIGPythonRunScriptKeywordFrame; 3070 } 3071 3072 void 3073 ScriptInterpreterPython::InitializePrivate () 3074 { 3075 Timer scoped_timer (__PRETTY_FUNCTION__, __PRETTY_FUNCTION__); 3076 3077 // Python will muck with STDIN terminal state, so save off any current TTY 3078 // settings so we can restore them. 3079 TerminalState stdin_tty_state; 3080 stdin_tty_state.Save(STDIN_FILENO, false); 3081 3082 PyGILState_STATE gstate; 3083 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SCRIPT | LIBLLDB_LOG_VERBOSE)); 3084 bool threads_already_initialized = false; 3085 if (PyEval_ThreadsInitialized ()) { 3086 gstate = PyGILState_Ensure (); 3087 if (log) 3088 log->Printf("Ensured PyGILState. Previous state = %slocked\n", gstate == PyGILState_UNLOCKED ? "un" : ""); 3089 threads_already_initialized = true; 3090 } else { 3091 // InitThreads acquires the GIL if it hasn't been called before. 3092 PyEval_InitThreads (); 3093 } 3094 Py_InitializeEx (0); 3095 3096 // Initialize SWIG after setting up python 3097 assert (g_swig_init_callback != NULL); 3098 g_swig_init_callback (); 3099 3100 // Update the path python uses to search for modules to include the current directory. 3101 3102 PyRun_SimpleString ("import sys"); 3103 PyRun_SimpleString ("sys.path.append ('.')"); 3104 3105 // Find the module that owns this code and use that path we get to 3106 // set the sys.path appropriately. 3107 3108 FileSpec file_spec; 3109 char python_dir_path[PATH_MAX]; 3110 if (Host::GetLLDBPath (ePathTypePythonDir, file_spec)) 3111 { 3112 std::string python_path("sys.path.insert(0,\""); 3113 size_t orig_len = python_path.length(); 3114 if (file_spec.GetPath(python_dir_path, sizeof (python_dir_path))) 3115 { 3116 python_path.append (python_dir_path); 3117 python_path.append ("\")"); 3118 PyRun_SimpleString (python_path.c_str()); 3119 python_path.resize (orig_len); 3120 } 3121 3122 if (Host::GetLLDBPath (ePathTypeLLDBShlibDir, file_spec)) 3123 { 3124 if (file_spec.GetPath(python_dir_path, sizeof (python_dir_path))) 3125 { 3126 python_path.append (python_dir_path); 3127 python_path.append ("\")"); 3128 PyRun_SimpleString (python_path.c_str()); 3129 python_path.resize (orig_len); 3130 } 3131 } 3132 } 3133 3134 PyRun_SimpleString ("sys.dont_write_bytecode = 1; import lldb.embedded_interpreter; from lldb.embedded_interpreter import run_python_interpreter; from lldb.embedded_interpreter import run_one_line; from termios import *"); 3135 3136 if (threads_already_initialized) { 3137 if (log) 3138 log->Printf("Releasing PyGILState. Returning to state = %slocked\n", gstate == PyGILState_UNLOCKED ? "un" : ""); 3139 PyGILState_Release (gstate); 3140 } else { 3141 // We initialized the threads in this function, just unlock the GIL. 3142 PyEval_SaveThread(); 3143 } 3144 3145 stdin_tty_state.Restore(); 3146 } 3147 3148 //void 3149 //ScriptInterpreterPython::Terminate () 3150 //{ 3151 // // We are intentionally NOT calling Py_Finalize here (this would be the logical place to call it). Calling 3152 // // Py_Finalize here causes test suite runs to seg fault: The test suite runs in Python. It registers 3153 // // SBDebugger::Terminate to be called 'at_exit'. When the test suite Python harness finishes up, it calls 3154 // // Py_Finalize, which calls all the 'at_exit' registered functions. SBDebugger::Terminate calls Debugger::Terminate, 3155 // // which calls lldb::Terminate, which calls ScriptInterpreter::Terminate, which calls 3156 // // ScriptInterpreterPython::Terminate. So if we call Py_Finalize here, we end up with Py_Finalize being called from 3157 // // within Py_Finalize, which results in a seg fault. 3158 // // 3159 // // Since this function only gets called when lldb is shutting down and going away anyway, the fact that we don't 3160 // // actually call Py_Finalize should not cause any problems (everything should shut down/go away anyway when the 3161 // // process exits). 3162 // // 3163 //// Py_Finalize (); 3164 //} 3165 3166 #endif // #ifdef LLDB_DISABLE_PYTHON 3167
