1 //===-- Process.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 #include "lldb/lldb-python.h" 11 12 #include "lldb/Target/Process.h" 13 14 #include "lldb/lldb-private-log.h" 15 16 #include "lldb/Breakpoint/StoppointCallbackContext.h" 17 #include "lldb/Breakpoint/BreakpointLocation.h" 18 #include "lldb/Core/Event.h" 19 #include "lldb/Core/ConnectionFileDescriptor.h" 20 #include "lldb/Core/Debugger.h" 21 #include "lldb/Core/InputReader.h" 22 #include "lldb/Core/Log.h" 23 #include "lldb/Core/Module.h" 24 #include "lldb/Core/PluginManager.h" 25 #include "lldb/Core/State.h" 26 #include "lldb/Expression/ClangUserExpression.h" 27 #include "lldb/Interpreter/CommandInterpreter.h" 28 #include "lldb/Host/Host.h" 29 #include "lldb/Target/ABI.h" 30 #include "lldb/Target/DynamicLoader.h" 31 #include "lldb/Target/OperatingSystem.h" 32 #include "lldb/Target/LanguageRuntime.h" 33 #include "lldb/Target/CPPLanguageRuntime.h" 34 #include "lldb/Target/ObjCLanguageRuntime.h" 35 #include "lldb/Target/Platform.h" 36 #include "lldb/Target/RegisterContext.h" 37 #include "lldb/Target/StopInfo.h" 38 #include "lldb/Target/Target.h" 39 #include "lldb/Target/TargetList.h" 40 #include "lldb/Target/Thread.h" 41 #include "lldb/Target/ThreadPlan.h" 42 #include "lldb/Target/ThreadPlanBase.h" 43 44 using namespace lldb; 45 using namespace lldb_private; 46 47 48 // Comment out line below to disable memory caching, overriding the process setting 49 // target.process.disable-memory-cache 50 #define ENABLE_MEMORY_CACHING 51 52 #ifdef ENABLE_MEMORY_CACHING 53 #define DISABLE_MEM_CACHE_DEFAULT false 54 #else 55 #define DISABLE_MEM_CACHE_DEFAULT true 56 #endif 57 58 class ProcessOptionValueProperties : public OptionValueProperties 59 { 60 public: 61 ProcessOptionValueProperties (const ConstString &name) : 62 OptionValueProperties (name) 63 { 64 } 65 66 // This constructor is used when creating ProcessOptionValueProperties when it 67 // is part of a new lldb_private::Process instance. It will copy all current 68 // global property values as needed 69 ProcessOptionValueProperties (ProcessProperties *global_properties) : 70 OptionValueProperties(*global_properties->GetValueProperties()) 71 { 72 } 73 74 virtual const Property * 75 GetPropertyAtIndex (const ExecutionContext *exe_ctx, bool will_modify, uint32_t idx) const 76 { 77 // When gettings the value for a key from the process options, we will always 78 // try and grab the setting from the current process if there is one. Else we just 79 // use the one from this instance. 80 if (exe_ctx) 81 { 82 Process *process = exe_ctx->GetProcessPtr(); 83 if (process) 84 { 85 ProcessOptionValueProperties *instance_properties = static_cast<ProcessOptionValueProperties *>(process->GetValueProperties().get()); 86 if (this != instance_properties) 87 return instance_properties->ProtectedGetPropertyAtIndex (idx); 88 } 89 } 90 return ProtectedGetPropertyAtIndex (idx); 91 } 92 }; 93 94 static PropertyDefinition 95 g_properties[] = 96 { 97 { "disable-memory-cache" , OptionValue::eTypeBoolean, false, DISABLE_MEM_CACHE_DEFAULT, NULL, NULL, "Disable reading and caching of memory in fixed-size units." }, 98 { "extra-startup-command", OptionValue::eTypeArray , false, OptionValue::eTypeString, NULL, NULL, "A list containing extra commands understood by the particular process plugin used. " 99 "For instance, to turn on debugserver logging set this to \"QSetLogging:bitmask=LOG_DEFAULT;\"" }, 100 { "ignore-breakpoints-in-expressions", OptionValue::eTypeBoolean, true, true, NULL, NULL, "If true, breakpoints will be ignored during expression evaluation." }, 101 { "unwind-on-error-in-expressions", OptionValue::eTypeBoolean, true, true, NULL, NULL, "If true, errors in expression evaluation will unwind the stack back to the state before the call." }, 102 { "python-os-plugin-path", OptionValue::eTypeFileSpec, false, true, NULL, NULL, "A path to a python OS plug-in module file that contains a OperatingSystemPlugIn class." }, 103 { "stop-on-sharedlibrary-events" , OptionValue::eTypeBoolean, true, false, NULL, NULL, "If true, stop when a shared library is loaded or unloaded." }, 104 { "detach-keeps-stopped" , OptionValue::eTypeBoolean, true, false, NULL, NULL, "If true, detach will attempt to keep the process stopped." }, 105 { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } 106 }; 107 108 enum { 109 ePropertyDisableMemCache, 110 ePropertyExtraStartCommand, 111 ePropertyIgnoreBreakpointsInExpressions, 112 ePropertyUnwindOnErrorInExpressions, 113 ePropertyPythonOSPluginPath, 114 ePropertyStopOnSharedLibraryEvents, 115 ePropertyDetachKeepsStopped 116 }; 117 118 ProcessProperties::ProcessProperties (bool is_global) : 119 Properties () 120 { 121 if (is_global) 122 { 123 m_collection_sp.reset (new ProcessOptionValueProperties(ConstString("process"))); 124 m_collection_sp->Initialize(g_properties); 125 m_collection_sp->AppendProperty(ConstString("thread"), 126 ConstString("Settings specific to threads."), 127 true, 128 Thread::GetGlobalProperties()->GetValueProperties()); 129 } 130 else 131 m_collection_sp.reset (new ProcessOptionValueProperties(Process::GetGlobalProperties().get())); 132 } 133 134 ProcessProperties::~ProcessProperties() 135 { 136 } 137 138 bool 139 ProcessProperties::GetDisableMemoryCache() const 140 { 141 const uint32_t idx = ePropertyDisableMemCache; 142 return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0); 143 } 144 145 Args 146 ProcessProperties::GetExtraStartupCommands () const 147 { 148 Args args; 149 const uint32_t idx = ePropertyExtraStartCommand; 150 m_collection_sp->GetPropertyAtIndexAsArgs(NULL, idx, args); 151 return args; 152 } 153 154 void 155 ProcessProperties::SetExtraStartupCommands (const Args &args) 156 { 157 const uint32_t idx = ePropertyExtraStartCommand; 158 m_collection_sp->SetPropertyAtIndexFromArgs(NULL, idx, args); 159 } 160 161 FileSpec 162 ProcessProperties::GetPythonOSPluginPath () const 163 { 164 const uint32_t idx = ePropertyPythonOSPluginPath; 165 return m_collection_sp->GetPropertyAtIndexAsFileSpec(NULL, idx); 166 } 167 168 void 169 ProcessProperties::SetPythonOSPluginPath (const FileSpec &file) 170 { 171 const uint32_t idx = ePropertyPythonOSPluginPath; 172 m_collection_sp->SetPropertyAtIndexAsFileSpec(NULL, idx, file); 173 } 174 175 176 bool 177 ProcessProperties::GetIgnoreBreakpointsInExpressions () const 178 { 179 const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions; 180 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 181 } 182 183 void 184 ProcessProperties::SetIgnoreBreakpointsInExpressions (bool ignore) 185 { 186 const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions; 187 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, ignore); 188 } 189 190 bool 191 ProcessProperties::GetUnwindOnErrorInExpressions () const 192 { 193 const uint32_t idx = ePropertyUnwindOnErrorInExpressions; 194 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 195 } 196 197 void 198 ProcessProperties::SetUnwindOnErrorInExpressions (bool ignore) 199 { 200 const uint32_t idx = ePropertyUnwindOnErrorInExpressions; 201 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, ignore); 202 } 203 204 bool 205 ProcessProperties::GetStopOnSharedLibraryEvents () const 206 { 207 const uint32_t idx = ePropertyStopOnSharedLibraryEvents; 208 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 209 } 210 211 void 212 ProcessProperties::SetStopOnSharedLibraryEvents (bool stop) 213 { 214 const uint32_t idx = ePropertyStopOnSharedLibraryEvents; 215 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, stop); 216 } 217 218 bool 219 ProcessProperties::GetDetachKeepsStopped () const 220 { 221 const uint32_t idx = ePropertyDetachKeepsStopped; 222 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 223 } 224 225 void 226 ProcessProperties::SetDetachKeepsStopped (bool stop) 227 { 228 const uint32_t idx = ePropertyDetachKeepsStopped; 229 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, stop); 230 } 231 232 void 233 ProcessInstanceInfo::Dump (Stream &s, Platform *platform) const 234 { 235 const char *cstr; 236 if (m_pid != LLDB_INVALID_PROCESS_ID) 237 s.Printf (" pid = %" PRIu64 "\n", m_pid); 238 239 if (m_parent_pid != LLDB_INVALID_PROCESS_ID) 240 s.Printf (" parent = %" PRIu64 "\n", m_parent_pid); 241 242 if (m_executable) 243 { 244 s.Printf (" name = %s\n", m_executable.GetFilename().GetCString()); 245 s.PutCString (" file = "); 246 m_executable.Dump(&s); 247 s.EOL(); 248 } 249 const uint32_t argc = m_arguments.GetArgumentCount(); 250 if (argc > 0) 251 { 252 for (uint32_t i=0; i<argc; i++) 253 { 254 const char *arg = m_arguments.GetArgumentAtIndex(i); 255 if (i < 10) 256 s.Printf (" arg[%u] = %s\n", i, arg); 257 else 258 s.Printf ("arg[%u] = %s\n", i, arg); 259 } 260 } 261 262 const uint32_t envc = m_environment.GetArgumentCount(); 263 if (envc > 0) 264 { 265 for (uint32_t i=0; i<envc; i++) 266 { 267 const char *env = m_environment.GetArgumentAtIndex(i); 268 if (i < 10) 269 s.Printf (" env[%u] = %s\n", i, env); 270 else 271 s.Printf ("env[%u] = %s\n", i, env); 272 } 273 } 274 275 if (m_arch.IsValid()) 276 s.Printf (" arch = %s\n", m_arch.GetTriple().str().c_str()); 277 278 if (m_uid != UINT32_MAX) 279 { 280 cstr = platform->GetUserName (m_uid); 281 s.Printf (" uid = %-5u (%s)\n", m_uid, cstr ? cstr : ""); 282 } 283 if (m_gid != UINT32_MAX) 284 { 285 cstr = platform->GetGroupName (m_gid); 286 s.Printf (" gid = %-5u (%s)\n", m_gid, cstr ? cstr : ""); 287 } 288 if (m_euid != UINT32_MAX) 289 { 290 cstr = platform->GetUserName (m_euid); 291 s.Printf (" euid = %-5u (%s)\n", m_euid, cstr ? cstr : ""); 292 } 293 if (m_egid != UINT32_MAX) 294 { 295 cstr = platform->GetGroupName (m_egid); 296 s.Printf (" egid = %-5u (%s)\n", m_egid, cstr ? cstr : ""); 297 } 298 } 299 300 void 301 ProcessInstanceInfo::DumpTableHeader (Stream &s, Platform *platform, bool show_args, bool verbose) 302 { 303 const char *label; 304 if (show_args || verbose) 305 label = "ARGUMENTS"; 306 else 307 label = "NAME"; 308 309 if (verbose) 310 { 311 s.Printf ("PID PARENT USER GROUP EFF USER EFF GROUP TRIPLE %s\n", label); 312 s.PutCString ("====== ====== ========== ========== ========== ========== ======================== ============================\n"); 313 } 314 else 315 { 316 s.Printf ("PID PARENT USER ARCH %s\n", label); 317 s.PutCString ("====== ====== ========== ======= ============================\n"); 318 } 319 } 320 321 void 322 ProcessInstanceInfo::DumpAsTableRow (Stream &s, Platform *platform, bool show_args, bool verbose) const 323 { 324 if (m_pid != LLDB_INVALID_PROCESS_ID) 325 { 326 const char *cstr; 327 s.Printf ("%-6" PRIu64 " %-6" PRIu64 " ", m_pid, m_parent_pid); 328 329 330 if (verbose) 331 { 332 cstr = platform->GetUserName (m_uid); 333 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 334 s.Printf ("%-10s ", cstr); 335 else 336 s.Printf ("%-10u ", m_uid); 337 338 cstr = platform->GetGroupName (m_gid); 339 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 340 s.Printf ("%-10s ", cstr); 341 else 342 s.Printf ("%-10u ", m_gid); 343 344 cstr = platform->GetUserName (m_euid); 345 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 346 s.Printf ("%-10s ", cstr); 347 else 348 s.Printf ("%-10u ", m_euid); 349 350 cstr = platform->GetGroupName (m_egid); 351 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 352 s.Printf ("%-10s ", cstr); 353 else 354 s.Printf ("%-10u ", m_egid); 355 s.Printf ("%-24s ", m_arch.IsValid() ? m_arch.GetTriple().str().c_str() : ""); 356 } 357 else 358 { 359 s.Printf ("%-10s %-7d %s ", 360 platform->GetUserName (m_euid), 361 (int)m_arch.GetTriple().getArchName().size(), 362 m_arch.GetTriple().getArchName().data()); 363 } 364 365 if (verbose || show_args) 366 { 367 const uint32_t argc = m_arguments.GetArgumentCount(); 368 if (argc > 0) 369 { 370 for (uint32_t i=0; i<argc; i++) 371 { 372 if (i > 0) 373 s.PutChar (' '); 374 s.PutCString (m_arguments.GetArgumentAtIndex(i)); 375 } 376 } 377 } 378 else 379 { 380 s.PutCString (GetName()); 381 } 382 383 s.EOL(); 384 } 385 } 386 387 388 void 389 ProcessInfo::SetArguments (char const **argv, bool first_arg_is_executable) 390 { 391 m_arguments.SetArguments (argv); 392 393 // Is the first argument the executable? 394 if (first_arg_is_executable) 395 { 396 const char *first_arg = m_arguments.GetArgumentAtIndex (0); 397 if (first_arg) 398 { 399 // Yes the first argument is an executable, set it as the executable 400 // in the launch options. Don't resolve the file path as the path 401 // could be a remote platform path 402 const bool resolve = false; 403 m_executable.SetFile(first_arg, resolve); 404 } 405 } 406 } 407 void 408 ProcessInfo::SetArguments (const Args& args, bool first_arg_is_executable) 409 { 410 // Copy all arguments 411 m_arguments = args; 412 413 // Is the first argument the executable? 414 if (first_arg_is_executable) 415 { 416 const char *first_arg = m_arguments.GetArgumentAtIndex (0); 417 if (first_arg) 418 { 419 // Yes the first argument is an executable, set it as the executable 420 // in the launch options. Don't resolve the file path as the path 421 // could be a remote platform path 422 const bool resolve = false; 423 m_executable.SetFile(first_arg, resolve); 424 } 425 } 426 } 427 428 void 429 ProcessLaunchInfo::FinalizeFileActions (Target *target, bool default_to_use_pty) 430 { 431 // If notthing was specified, then check the process for any default 432 // settings that were set with "settings set" 433 if (m_file_actions.empty()) 434 { 435 if (m_flags.Test(eLaunchFlagDisableSTDIO)) 436 { 437 AppendSuppressFileAction (STDIN_FILENO , true, false); 438 AppendSuppressFileAction (STDOUT_FILENO, false, true); 439 AppendSuppressFileAction (STDERR_FILENO, false, true); 440 } 441 else 442 { 443 // Check for any values that might have gotten set with any of: 444 // (lldb) settings set target.input-path 445 // (lldb) settings set target.output-path 446 // (lldb) settings set target.error-path 447 FileSpec in_path; 448 FileSpec out_path; 449 FileSpec err_path; 450 if (target) 451 { 452 in_path = target->GetStandardInputPath(); 453 out_path = target->GetStandardOutputPath(); 454 err_path = target->GetStandardErrorPath(); 455 } 456 457 if (in_path || out_path || err_path) 458 { 459 char path[PATH_MAX]; 460 if (in_path && in_path.GetPath(path, sizeof(path))) 461 AppendOpenFileAction(STDIN_FILENO, path, true, false); 462 463 if (out_path && out_path.GetPath(path, sizeof(path))) 464 AppendOpenFileAction(STDOUT_FILENO, path, false, true); 465 466 if (err_path && err_path.GetPath(path, sizeof(path))) 467 AppendOpenFileAction(STDERR_FILENO, path, false, true); 468 } 469 else if (default_to_use_pty) 470 { 471 if (m_pty.OpenFirstAvailableMaster (O_RDWR|O_NOCTTY, NULL, 0)) 472 { 473 const char *slave_path = m_pty.GetSlaveName (NULL, 0); 474 AppendOpenFileAction(STDIN_FILENO, slave_path, true, false); 475 AppendOpenFileAction(STDOUT_FILENO, slave_path, false, true); 476 AppendOpenFileAction(STDERR_FILENO, slave_path, false, true); 477 } 478 } 479 } 480 } 481 } 482 483 484 bool 485 ProcessLaunchInfo::ConvertArgumentsForLaunchingInShell (Error &error, 486 bool localhost, 487 bool will_debug, 488 bool first_arg_is_full_shell_command) 489 { 490 error.Clear(); 491 492 if (GetFlags().Test (eLaunchFlagLaunchInShell)) 493 { 494 const char *shell_executable = GetShell(); 495 if (shell_executable) 496 { 497 char shell_resolved_path[PATH_MAX]; 498 499 if (localhost) 500 { 501 FileSpec shell_filespec (shell_executable, true); 502 503 if (!shell_filespec.Exists()) 504 { 505 // Resolve the path in case we just got "bash", "sh" or "tcsh" 506 if (!shell_filespec.ResolveExecutableLocation ()) 507 { 508 error.SetErrorStringWithFormat("invalid shell path '%s'", shell_executable); 509 return false; 510 } 511 } 512 shell_filespec.GetPath (shell_resolved_path, sizeof(shell_resolved_path)); 513 shell_executable = shell_resolved_path; 514 } 515 516 const char **argv = GetArguments().GetConstArgumentVector (); 517 if (argv == NULL || argv[0] == NULL) 518 return false; 519 Args shell_arguments; 520 std::string safe_arg; 521 shell_arguments.AppendArgument (shell_executable); 522 shell_arguments.AppendArgument ("-c"); 523 StreamString shell_command; 524 if (will_debug) 525 { 526 // Add a modified PATH environment variable in case argv[0] 527 // is a relative path 528 const char *argv0 = argv[0]; 529 if (argv0 && (argv0[0] != '/' && argv0[0] != '~')) 530 { 531 // We have a relative path to our executable which may not work if 532 // we just try to run "a.out" (without it being converted to "./a.out") 533 const char *working_dir = GetWorkingDirectory(); 534 // Be sure to put quotes around PATH's value in case any paths have spaces... 535 std::string new_path("PATH=\""); 536 const size_t empty_path_len = new_path.size(); 537 538 if (working_dir && working_dir[0]) 539 { 540 new_path += working_dir; 541 } 542 else 543 { 544 char current_working_dir[PATH_MAX]; 545 const char *cwd = getcwd(current_working_dir, sizeof(current_working_dir)); 546 if (cwd && cwd[0]) 547 new_path += cwd; 548 } 549 const char *curr_path = getenv("PATH"); 550 if (curr_path) 551 { 552 if (new_path.size() > empty_path_len) 553 new_path += ':'; 554 new_path += curr_path; 555 } 556 new_path += "\" "; 557 shell_command.PutCString(new_path.c_str()); 558 } 559 560 shell_command.PutCString ("exec"); 561 562 // Only Apple supports /usr/bin/arch being able to specify the architecture 563 if (GetArchitecture().IsValid()) 564 { 565 shell_command.Printf(" /usr/bin/arch -arch %s", GetArchitecture().GetArchitectureName()); 566 // Set the resume count to 2: 567 // 1 - stop in shell 568 // 2 - stop in /usr/bin/arch 569 // 3 - then we will stop in our program 570 SetResumeCount(2); 571 } 572 else 573 { 574 // Set the resume count to 1: 575 // 1 - stop in shell 576 // 2 - then we will stop in our program 577 SetResumeCount(1); 578 } 579 } 580 581 if (first_arg_is_full_shell_command) 582 { 583 // There should only be one argument that is the shell command itself to be used as is 584 if (argv[0] && !argv[1]) 585 shell_command.Printf("%s", argv[0]); 586 else 587 return false; 588 } 589 else 590 { 591 for (size_t i=0; argv[i] != NULL; ++i) 592 { 593 const char *arg = Args::GetShellSafeArgument (argv[i], safe_arg); 594 shell_command.Printf(" %s", arg); 595 } 596 } 597 shell_arguments.AppendArgument (shell_command.GetString().c_str()); 598 m_executable.SetFile(shell_executable, false); 599 m_arguments = shell_arguments; 600 return true; 601 } 602 else 603 { 604 error.SetErrorString ("invalid shell path"); 605 } 606 } 607 else 608 { 609 error.SetErrorString ("not launching in shell"); 610 } 611 return false; 612 } 613 614 615 bool 616 ProcessLaunchInfo::FileAction::Open (int fd, const char *path, bool read, bool write) 617 { 618 if ((read || write) && fd >= 0 && path && path[0]) 619 { 620 m_action = eFileActionOpen; 621 m_fd = fd; 622 if (read && write) 623 m_arg = O_NOCTTY | O_CREAT | O_RDWR; 624 else if (read) 625 m_arg = O_NOCTTY | O_RDONLY; 626 else 627 m_arg = O_NOCTTY | O_CREAT | O_WRONLY; 628 m_path.assign (path); 629 return true; 630 } 631 else 632 { 633 Clear(); 634 } 635 return false; 636 } 637 638 bool 639 ProcessLaunchInfo::FileAction::Close (int fd) 640 { 641 Clear(); 642 if (fd >= 0) 643 { 644 m_action = eFileActionClose; 645 m_fd = fd; 646 } 647 return m_fd >= 0; 648 } 649 650 651 bool 652 ProcessLaunchInfo::FileAction::Duplicate (int fd, int dup_fd) 653 { 654 Clear(); 655 if (fd >= 0 && dup_fd >= 0) 656 { 657 m_action = eFileActionDuplicate; 658 m_fd = fd; 659 m_arg = dup_fd; 660 } 661 return m_fd >= 0; 662 } 663 664 665 666 bool 667 ProcessLaunchInfo::FileAction::AddPosixSpawnFileAction (posix_spawn_file_actions_t *file_actions, 668 const FileAction *info, 669 Log *log, 670 Error& error) 671 { 672 if (info == NULL) 673 return false; 674 675 switch (info->m_action) 676 { 677 case eFileActionNone: 678 error.Clear(); 679 break; 680 681 case eFileActionClose: 682 if (info->m_fd == -1) 683 error.SetErrorString ("invalid fd for posix_spawn_file_actions_addclose(...)"); 684 else 685 { 686 error.SetError (::posix_spawn_file_actions_addclose (file_actions, info->m_fd), 687 eErrorTypePOSIX); 688 if (log && (error.Fail() || log)) 689 error.PutToLog(log, "posix_spawn_file_actions_addclose (action=%p, fd=%i)", 690 file_actions, info->m_fd); 691 } 692 break; 693 694 case eFileActionDuplicate: 695 if (info->m_fd == -1) 696 error.SetErrorString ("invalid fd for posix_spawn_file_actions_adddup2(...)"); 697 else if (info->m_arg == -1) 698 error.SetErrorString ("invalid duplicate fd for posix_spawn_file_actions_adddup2(...)"); 699 else 700 { 701 error.SetError (::posix_spawn_file_actions_adddup2 (file_actions, info->m_fd, info->m_arg), 702 eErrorTypePOSIX); 703 if (log && (error.Fail() || log)) 704 error.PutToLog(log, "posix_spawn_file_actions_adddup2 (action=%p, fd=%i, dup_fd=%i)", 705 file_actions, info->m_fd, info->m_arg); 706 } 707 break; 708 709 case eFileActionOpen: 710 if (info->m_fd == -1) 711 error.SetErrorString ("invalid fd in posix_spawn_file_actions_addopen(...)"); 712 else 713 { 714 int oflag = info->m_arg; 715 716 mode_t mode = 0; 717 718 if (oflag & O_CREAT) 719 mode = 0640; 720 721 error.SetError (::posix_spawn_file_actions_addopen (file_actions, 722 info->m_fd, 723 info->m_path.c_str(), 724 oflag, 725 mode), 726 eErrorTypePOSIX); 727 if (error.Fail() || log) 728 error.PutToLog(log, 729 "posix_spawn_file_actions_addopen (action=%p, fd=%i, path='%s', oflag=%i, mode=%i)", 730 file_actions, info->m_fd, info->m_path.c_str(), oflag, mode); 731 } 732 break; 733 } 734 return error.Success(); 735 } 736 737 Error 738 ProcessLaunchCommandOptions::SetOptionValue (uint32_t option_idx, const char *option_arg) 739 { 740 Error error; 741 const int short_option = m_getopt_table[option_idx].val; 742 743 switch (short_option) 744 { 745 case 's': // Stop at program entry point 746 launch_info.GetFlags().Set (eLaunchFlagStopAtEntry); 747 break; 748 749 case 'i': // STDIN for read only 750 { 751 ProcessLaunchInfo::FileAction action; 752 if (action.Open (STDIN_FILENO, option_arg, true, false)) 753 launch_info.AppendFileAction (action); 754 } 755 break; 756 757 case 'o': // Open STDOUT for write only 758 { 759 ProcessLaunchInfo::FileAction action; 760 if (action.Open (STDOUT_FILENO, option_arg, false, true)) 761 launch_info.AppendFileAction (action); 762 } 763 break; 764 765 case 'e': // STDERR for write only 766 { 767 ProcessLaunchInfo::FileAction action; 768 if (action.Open (STDERR_FILENO, option_arg, false, true)) 769 launch_info.AppendFileAction (action); 770 } 771 break; 772 773 774 case 'p': // Process plug-in name 775 launch_info.SetProcessPluginName (option_arg); 776 break; 777 778 case 'n': // Disable STDIO 779 { 780 ProcessLaunchInfo::FileAction action; 781 if (action.Open (STDIN_FILENO, "/dev/null", true, false)) 782 launch_info.AppendFileAction (action); 783 if (action.Open (STDOUT_FILENO, "/dev/null", false, true)) 784 launch_info.AppendFileAction (action); 785 if (action.Open (STDERR_FILENO, "/dev/null", false, true)) 786 launch_info.AppendFileAction (action); 787 } 788 break; 789 790 case 'w': 791 launch_info.SetWorkingDirectory (option_arg); 792 break; 793 794 case 't': // Open process in new terminal window 795 launch_info.GetFlags().Set (eLaunchFlagLaunchInTTY); 796 break; 797 798 case 'a': 799 if (!launch_info.GetArchitecture().SetTriple (option_arg, m_interpreter.GetPlatform(true).get())) 800 launch_info.GetArchitecture().SetTriple (option_arg); 801 break; 802 803 case 'A': 804 launch_info.GetFlags().Set (eLaunchFlagDisableASLR); 805 break; 806 807 case 'c': 808 if (option_arg && option_arg[0]) 809 launch_info.SetShell (option_arg); 810 else 811 launch_info.SetShell ("/bin/bash"); 812 break; 813 814 case 'v': 815 launch_info.GetEnvironmentEntries().AppendArgument(option_arg); 816 break; 817 818 default: 819 error.SetErrorStringWithFormat("unrecognized short option character '%c'", short_option); 820 break; 821 822 } 823 return error; 824 } 825 826 OptionDefinition 827 ProcessLaunchCommandOptions::g_option_table[] = 828 { 829 { LLDB_OPT_SET_ALL, false, "stop-at-entry", 's', no_argument, NULL, 0, eArgTypeNone, "Stop at the entry point of the program when launching a process."}, 830 { LLDB_OPT_SET_ALL, false, "disable-aslr", 'A', no_argument, NULL, 0, eArgTypeNone, "Disable address space layout randomization when launching a process."}, 831 { LLDB_OPT_SET_ALL, false, "plugin", 'p', required_argument, NULL, 0, eArgTypePlugin, "Name of the process plugin you want to use."}, 832 { LLDB_OPT_SET_ALL, false, "working-dir", 'w', required_argument, NULL, 0, eArgTypeDirectoryName, "Set the current working directory to <path> when running the inferior."}, 833 { LLDB_OPT_SET_ALL, false, "arch", 'a', required_argument, NULL, 0, eArgTypeArchitecture, "Set the architecture for the process to launch when ambiguous."}, 834 { LLDB_OPT_SET_ALL, false, "environment", 'v', required_argument, NULL, 0, eArgTypeNone, "Specify an environment variable name/value stirng (--environement NAME=VALUE). Can be specified multiple times for subsequent environment entries."}, 835 { LLDB_OPT_SET_ALL, false, "shell", 'c', optional_argument, NULL, 0, eArgTypeFilename, "Run the process in a shell (not supported on all platforms)."}, 836 837 { LLDB_OPT_SET_1 , false, "stdin", 'i', required_argument, NULL, 0, eArgTypeFilename, "Redirect stdin for the process to <filename>."}, 838 { LLDB_OPT_SET_1 , false, "stdout", 'o', required_argument, NULL, 0, eArgTypeFilename, "Redirect stdout for the process to <filename>."}, 839 { LLDB_OPT_SET_1 , false, "stderr", 'e', required_argument, NULL, 0, eArgTypeFilename, "Redirect stderr for the process to <filename>."}, 840 841 { LLDB_OPT_SET_2 , false, "tty", 't', no_argument, NULL, 0, eArgTypeNone, "Start the process in a terminal (not supported on all platforms)."}, 842 843 { LLDB_OPT_SET_3 , false, "no-stdio", 'n', no_argument, NULL, 0, eArgTypeNone, "Do not set up for terminal I/O to go to running process."}, 844 845 { 0 , false, NULL, 0, 0, NULL, 0, eArgTypeNone, NULL } 846 }; 847 848 849 850 bool 851 ProcessInstanceInfoMatch::NameMatches (const char *process_name) const 852 { 853 if (m_name_match_type == eNameMatchIgnore || process_name == NULL) 854 return true; 855 const char *match_name = m_match_info.GetName(); 856 if (!match_name) 857 return true; 858 859 return lldb_private::NameMatches (process_name, m_name_match_type, match_name); 860 } 861 862 bool 863 ProcessInstanceInfoMatch::Matches (const ProcessInstanceInfo &proc_info) const 864 { 865 if (!NameMatches (proc_info.GetName())) 866 return false; 867 868 if (m_match_info.ProcessIDIsValid() && 869 m_match_info.GetProcessID() != proc_info.GetProcessID()) 870 return false; 871 872 if (m_match_info.ParentProcessIDIsValid() && 873 m_match_info.GetParentProcessID() != proc_info.GetParentProcessID()) 874 return false; 875 876 if (m_match_info.UserIDIsValid () && 877 m_match_info.GetUserID() != proc_info.GetUserID()) 878 return false; 879 880 if (m_match_info.GroupIDIsValid () && 881 m_match_info.GetGroupID() != proc_info.GetGroupID()) 882 return false; 883 884 if (m_match_info.EffectiveUserIDIsValid () && 885 m_match_info.GetEffectiveUserID() != proc_info.GetEffectiveUserID()) 886 return false; 887 888 if (m_match_info.EffectiveGroupIDIsValid () && 889 m_match_info.GetEffectiveGroupID() != proc_info.GetEffectiveGroupID()) 890 return false; 891 892 if (m_match_info.GetArchitecture().IsValid() && 893 !m_match_info.GetArchitecture().IsCompatibleMatch(proc_info.GetArchitecture())) 894 return false; 895 return true; 896 } 897 898 bool 899 ProcessInstanceInfoMatch::MatchAllProcesses () const 900 { 901 if (m_name_match_type != eNameMatchIgnore) 902 return false; 903 904 if (m_match_info.ProcessIDIsValid()) 905 return false; 906 907 if (m_match_info.ParentProcessIDIsValid()) 908 return false; 909 910 if (m_match_info.UserIDIsValid ()) 911 return false; 912 913 if (m_match_info.GroupIDIsValid ()) 914 return false; 915 916 if (m_match_info.EffectiveUserIDIsValid ()) 917 return false; 918 919 if (m_match_info.EffectiveGroupIDIsValid ()) 920 return false; 921 922 if (m_match_info.GetArchitecture().IsValid()) 923 return false; 924 925 if (m_match_all_users) 926 return false; 927 928 return true; 929 930 } 931 932 void 933 ProcessInstanceInfoMatch::Clear() 934 { 935 m_match_info.Clear(); 936 m_name_match_type = eNameMatchIgnore; 937 m_match_all_users = false; 938 } 939 940 ProcessSP 941 Process::FindPlugin (Target &target, const char *plugin_name, Listener &listener, const FileSpec *crash_file_path) 942 { 943 static uint32_t g_process_unique_id = 0; 944 945 ProcessSP process_sp; 946 ProcessCreateInstance create_callback = NULL; 947 if (plugin_name) 948 { 949 ConstString const_plugin_name(plugin_name); 950 create_callback = PluginManager::GetProcessCreateCallbackForPluginName (const_plugin_name); 951 if (create_callback) 952 { 953 process_sp = create_callback(target, listener, crash_file_path); 954 if (process_sp) 955 { 956 if (process_sp->CanDebug(target, true)) 957 { 958 process_sp->m_process_unique_id = ++g_process_unique_id; 959 } 960 else 961 process_sp.reset(); 962 } 963 } 964 } 965 else 966 { 967 for (uint32_t idx = 0; (create_callback = PluginManager::GetProcessCreateCallbackAtIndex(idx)) != NULL; ++idx) 968 { 969 process_sp = create_callback(target, listener, crash_file_path); 970 if (process_sp) 971 { 972 if (process_sp->CanDebug(target, false)) 973 { 974 process_sp->m_process_unique_id = ++g_process_unique_id; 975 break; 976 } 977 else 978 process_sp.reset(); 979 } 980 } 981 } 982 return process_sp; 983 } 984 985 ConstString & 986 Process::GetStaticBroadcasterClass () 987 { 988 static ConstString class_name ("lldb.process"); 989 return class_name; 990 } 991 992 //---------------------------------------------------------------------- 993 // Process constructor 994 //---------------------------------------------------------------------- 995 Process::Process(Target &target, Listener &listener) : 996 ProcessProperties (false), 997 UserID (LLDB_INVALID_PROCESS_ID), 998 Broadcaster (&(target.GetDebugger()), "lldb.process"), 999 m_reservation_cache (*this), 1000 m_target (target), 1001 m_public_state (eStateUnloaded), 1002 m_private_state (eStateUnloaded), 1003 m_private_state_broadcaster (NULL, "lldb.process.internal_state_broadcaster"), 1004 m_private_state_control_broadcaster (NULL, "lldb.process.internal_state_control_broadcaster"), 1005 m_private_state_listener ("lldb.process.internal_state_listener"), 1006 m_private_state_control_wait(), 1007 m_private_state_thread (LLDB_INVALID_HOST_THREAD), 1008 m_mod_id (), 1009 m_process_unique_id(0), 1010 m_thread_index_id (0), 1011 m_thread_id_to_index_id_map (), 1012 m_exit_status (-1), 1013 m_exit_string (), 1014 m_thread_mutex (Mutex::eMutexTypeRecursive), 1015 m_thread_list_real (this), 1016 m_thread_list (this), 1017 m_notifications (), 1018 m_image_tokens (), 1019 m_listener (listener), 1020 m_breakpoint_site_list (), 1021 m_dynamic_checkers_ap (), 1022 m_unix_signals (), 1023 m_abi_sp (), 1024 m_process_input_reader (), 1025 m_stdio_communication ("process.stdio"), 1026 m_stdio_communication_mutex (Mutex::eMutexTypeRecursive), 1027 m_stdout_data (), 1028 m_stderr_data (), 1029 m_profile_data_comm_mutex (Mutex::eMutexTypeRecursive), 1030 m_profile_data (), 1031 m_memory_cache (*this), 1032 m_allocated_memory_cache (*this), 1033 m_should_detach (false), 1034 m_next_event_action_ap(), 1035 m_public_run_lock (), 1036 m_private_run_lock (), 1037 m_currently_handling_event(false), 1038 m_finalize_called(false), 1039 m_clear_thread_plans_on_stop (false), 1040 m_last_broadcast_state (eStateInvalid), 1041 m_destroy_in_process (false), 1042 m_can_jit(eCanJITDontKnow) 1043 { 1044 CheckInWithManager (); 1045 1046 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 1047 if (log) 1048 log->Printf ("%p Process::Process()", this); 1049 1050 SetEventName (eBroadcastBitStateChanged, "state-changed"); 1051 SetEventName (eBroadcastBitInterrupt, "interrupt"); 1052 SetEventName (eBroadcastBitSTDOUT, "stdout-available"); 1053 SetEventName (eBroadcastBitSTDERR, "stderr-available"); 1054 SetEventName (eBroadcastBitProfileData, "profile-data-available"); 1055 1056 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlStop , "control-stop" ); 1057 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlPause , "control-pause" ); 1058 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlResume, "control-resume"); 1059 1060 listener.StartListeningForEvents (this, 1061 eBroadcastBitStateChanged | 1062 eBroadcastBitInterrupt | 1063 eBroadcastBitSTDOUT | 1064 eBroadcastBitSTDERR | 1065 eBroadcastBitProfileData); 1066 1067 m_private_state_listener.StartListeningForEvents(&m_private_state_broadcaster, 1068 eBroadcastBitStateChanged | 1069 eBroadcastBitInterrupt); 1070 1071 m_private_state_listener.StartListeningForEvents(&m_private_state_control_broadcaster, 1072 eBroadcastInternalStateControlStop | 1073 eBroadcastInternalStateControlPause | 1074 eBroadcastInternalStateControlResume); 1075 } 1076 1077 //---------------------------------------------------------------------- 1078 // Destructor 1079 //---------------------------------------------------------------------- 1080 Process::~Process() 1081 { 1082 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 1083 if (log) 1084 log->Printf ("%p Process::~Process()", this); 1085 StopPrivateStateThread(); 1086 } 1087 1088 const ProcessPropertiesSP & 1089 Process::GetGlobalProperties() 1090 { 1091 static ProcessPropertiesSP g_settings_sp; 1092 if (!g_settings_sp) 1093 g_settings_sp.reset (new ProcessProperties (true)); 1094 return g_settings_sp; 1095 } 1096 1097 void 1098 Process::Finalize() 1099 { 1100 switch (GetPrivateState()) 1101 { 1102 case eStateConnected: 1103 case eStateAttaching: 1104 case eStateLaunching: 1105 case eStateStopped: 1106 case eStateRunning: 1107 case eStateStepping: 1108 case eStateCrashed: 1109 case eStateSuspended: 1110 if (GetShouldDetach()) 1111 { 1112 // FIXME: This will have to be a process setting: 1113 bool keep_stopped = false; 1114 Detach(keep_stopped); 1115 } 1116 else 1117 Destroy(); 1118 break; 1119 1120 case eStateInvalid: 1121 case eStateUnloaded: 1122 case eStateDetached: 1123 case eStateExited: 1124 break; 1125 } 1126 1127 // Clear our broadcaster before we proceed with destroying 1128 Broadcaster::Clear(); 1129 1130 // Do any cleanup needed prior to being destructed... Subclasses 1131 // that override this method should call this superclass method as well. 1132 1133 // We need to destroy the loader before the derived Process class gets destroyed 1134 // since it is very likely that undoing the loader will require access to the real process. 1135 m_dynamic_checkers_ap.reset(); 1136 m_abi_sp.reset(); 1137 m_os_ap.reset(); 1138 m_dyld_ap.reset(); 1139 m_thread_list_real.Destroy(); 1140 m_thread_list.Destroy(); 1141 std::vector<Notifications> empty_notifications; 1142 m_notifications.swap(empty_notifications); 1143 m_image_tokens.clear(); 1144 m_memory_cache.Clear(); 1145 m_allocated_memory_cache.Clear(); 1146 m_language_runtimes.clear(); 1147 m_next_event_action_ap.reset(); 1148 //#ifdef LLDB_CONFIGURATION_DEBUG 1149 // StreamFile s(stdout, false); 1150 // EventSP event_sp; 1151 // while (m_private_state_listener.GetNextEvent(event_sp)) 1152 // { 1153 // event_sp->Dump (&s); 1154 // s.EOL(); 1155 // } 1156 //#endif 1157 // We have to be very careful here as the m_private_state_listener might 1158 // contain events that have ProcessSP values in them which can keep this 1159 // process around forever. These events need to be cleared out. 1160 m_private_state_listener.Clear(); 1161 m_public_run_lock.WriteTryLock(); // This will do nothing if already locked 1162 m_public_run_lock.WriteUnlock(); 1163 m_private_run_lock.WriteTryLock(); // This will do nothing if already locked 1164 m_private_run_lock.WriteUnlock(); 1165 m_finalize_called = true; 1166 } 1167 1168 void 1169 Process::RegisterNotificationCallbacks (const Notifications& callbacks) 1170 { 1171 m_notifications.push_back(callbacks); 1172 if (callbacks.initialize != NULL) 1173 callbacks.initialize (callbacks.baton, this); 1174 } 1175 1176 bool 1177 Process::UnregisterNotificationCallbacks(const Notifications& callbacks) 1178 { 1179 std::vector<Notifications>::iterator pos, end = m_notifications.end(); 1180 for (pos = m_notifications.begin(); pos != end; ++pos) 1181 { 1182 if (pos->baton == callbacks.baton && 1183 pos->initialize == callbacks.initialize && 1184 pos->process_state_changed == callbacks.process_state_changed) 1185 { 1186 m_notifications.erase(pos); 1187 return true; 1188 } 1189 } 1190 return false; 1191 } 1192 1193 void 1194 Process::SynchronouslyNotifyStateChanged (StateType state) 1195 { 1196 std::vector<Notifications>::iterator notification_pos, notification_end = m_notifications.end(); 1197 for (notification_pos = m_notifications.begin(); notification_pos != notification_end; ++notification_pos) 1198 { 1199 if (notification_pos->process_state_changed) 1200 notification_pos->process_state_changed (notification_pos->baton, this, state); 1201 } 1202 } 1203 1204 // FIXME: We need to do some work on events before the general Listener sees them. 1205 // For instance if we are continuing from a breakpoint, we need to ensure that we do 1206 // the little "insert real insn, step & stop" trick. But we can't do that when the 1207 // event is delivered by the broadcaster - since that is done on the thread that is 1208 // waiting for new events, so if we needed more than one event for our handling, we would 1209 // stall. So instead we do it when we fetch the event off of the queue. 1210 // 1211 1212 StateType 1213 Process::GetNextEvent (EventSP &event_sp) 1214 { 1215 StateType state = eStateInvalid; 1216 1217 if (m_listener.GetNextEventForBroadcaster (this, event_sp) && event_sp) 1218 state = Process::ProcessEventData::GetStateFromEvent (event_sp.get()); 1219 1220 return state; 1221 } 1222 1223 1224 StateType 1225 Process::WaitForProcessToStop (const TimeValue *timeout, lldb::EventSP *event_sp_ptr) 1226 { 1227 // We can't just wait for a "stopped" event, because the stopped event may have restarted the target. 1228 // We have to actually check each event, and in the case of a stopped event check the restarted flag 1229 // on the event. 1230 if (event_sp_ptr) 1231 event_sp_ptr->reset(); 1232 StateType state = GetState(); 1233 // If we are exited or detached, we won't ever get back to any 1234 // other valid state... 1235 if (state == eStateDetached || state == eStateExited) 1236 return state; 1237 1238 while (state != eStateInvalid) 1239 { 1240 EventSP event_sp; 1241 state = WaitForStateChangedEvents (timeout, event_sp); 1242 if (event_sp_ptr && event_sp) 1243 *event_sp_ptr = event_sp; 1244 1245 switch (state) 1246 { 1247 case eStateCrashed: 1248 case eStateDetached: 1249 case eStateExited: 1250 case eStateUnloaded: 1251 return state; 1252 case eStateStopped: 1253 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 1254 continue; 1255 else 1256 return state; 1257 default: 1258 continue; 1259 } 1260 } 1261 return state; 1262 } 1263 1264 1265 StateType 1266 Process::WaitForState 1267 ( 1268 const TimeValue *timeout, 1269 const StateType *match_states, const uint32_t num_match_states 1270 ) 1271 { 1272 EventSP event_sp; 1273 uint32_t i; 1274 StateType state = GetState(); 1275 while (state != eStateInvalid) 1276 { 1277 // If we are exited or detached, we won't ever get back to any 1278 // other valid state... 1279 if (state == eStateDetached || state == eStateExited) 1280 return state; 1281 1282 state = WaitForStateChangedEvents (timeout, event_sp); 1283 1284 for (i=0; i<num_match_states; ++i) 1285 { 1286 if (match_states[i] == state) 1287 return state; 1288 } 1289 } 1290 return state; 1291 } 1292 1293 bool 1294 Process::HijackProcessEvents (Listener *listener) 1295 { 1296 if (listener != NULL) 1297 { 1298 return HijackBroadcaster(listener, eBroadcastBitStateChanged | eBroadcastBitInterrupt); 1299 } 1300 else 1301 return false; 1302 } 1303 1304 void 1305 Process::RestoreProcessEvents () 1306 { 1307 RestoreBroadcaster(); 1308 } 1309 1310 bool 1311 Process::HijackPrivateProcessEvents (Listener *listener) 1312 { 1313 if (listener != NULL) 1314 { 1315 return m_private_state_broadcaster.HijackBroadcaster(listener, eBroadcastBitStateChanged | eBroadcastBitInterrupt); 1316 } 1317 else 1318 return false; 1319 } 1320 1321 void 1322 Process::RestorePrivateProcessEvents () 1323 { 1324 m_private_state_broadcaster.RestoreBroadcaster(); 1325 } 1326 1327 StateType 1328 Process::WaitForStateChangedEvents (const TimeValue *timeout, EventSP &event_sp) 1329 { 1330 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1331 1332 if (log) 1333 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, timeout); 1334 1335 StateType state = eStateInvalid; 1336 if (m_listener.WaitForEventForBroadcasterWithType (timeout, 1337 this, 1338 eBroadcastBitStateChanged | eBroadcastBitInterrupt, 1339 event_sp)) 1340 { 1341 if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged) 1342 state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 1343 else if (log) 1344 log->Printf ("Process::%s got no event or was interrupted.", __FUNCTION__); 1345 } 1346 1347 if (log) 1348 log->Printf ("Process::%s (timeout = %p, event_sp) => %s", 1349 __FUNCTION__, 1350 timeout, 1351 StateAsCString(state)); 1352 return state; 1353 } 1354 1355 Event * 1356 Process::PeekAtStateChangedEvents () 1357 { 1358 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1359 1360 if (log) 1361 log->Printf ("Process::%s...", __FUNCTION__); 1362 1363 Event *event_ptr; 1364 event_ptr = m_listener.PeekAtNextEventForBroadcasterWithType (this, 1365 eBroadcastBitStateChanged); 1366 if (log) 1367 { 1368 if (event_ptr) 1369 { 1370 log->Printf ("Process::%s (event_ptr) => %s", 1371 __FUNCTION__, 1372 StateAsCString(ProcessEventData::GetStateFromEvent (event_ptr))); 1373 } 1374 else 1375 { 1376 log->Printf ("Process::%s no events found", 1377 __FUNCTION__); 1378 } 1379 } 1380 return event_ptr; 1381 } 1382 1383 StateType 1384 Process::WaitForStateChangedEventsPrivate (const TimeValue *timeout, EventSP &event_sp) 1385 { 1386 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1387 1388 if (log) 1389 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, timeout); 1390 1391 StateType state = eStateInvalid; 1392 if (m_private_state_listener.WaitForEventForBroadcasterWithType (timeout, 1393 &m_private_state_broadcaster, 1394 eBroadcastBitStateChanged | eBroadcastBitInterrupt, 1395 event_sp)) 1396 if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged) 1397 state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 1398 1399 // This is a bit of a hack, but when we wait here we could very well return 1400 // to the command-line, and that could disable the log, which would render the 1401 // log we got above invalid. 1402 if (log) 1403 { 1404 if (state == eStateInvalid) 1405 log->Printf ("Process::%s (timeout = %p, event_sp) => TIMEOUT", __FUNCTION__, timeout); 1406 else 1407 log->Printf ("Process::%s (timeout = %p, event_sp) => %s", __FUNCTION__, timeout, StateAsCString(state)); 1408 } 1409 return state; 1410 } 1411 1412 bool 1413 Process::WaitForEventsPrivate (const TimeValue *timeout, EventSP &event_sp, bool control_only) 1414 { 1415 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1416 1417 if (log) 1418 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, timeout); 1419 1420 if (control_only) 1421 return m_private_state_listener.WaitForEventForBroadcaster(timeout, &m_private_state_control_broadcaster, event_sp); 1422 else 1423 return m_private_state_listener.WaitForEvent(timeout, event_sp); 1424 } 1425 1426 bool 1427 Process::IsRunning () const 1428 { 1429 return StateIsRunningState (m_public_state.GetValue()); 1430 } 1431 1432 int 1433 Process::GetExitStatus () 1434 { 1435 if (m_public_state.GetValue() == eStateExited) 1436 return m_exit_status; 1437 return -1; 1438 } 1439 1440 1441 const char * 1442 Process::GetExitDescription () 1443 { 1444 if (m_public_state.GetValue() == eStateExited && !m_exit_string.empty()) 1445 return m_exit_string.c_str(); 1446 return NULL; 1447 } 1448 1449 bool 1450 Process::SetExitStatus (int status, const char *cstr) 1451 { 1452 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1453 if (log) 1454 log->Printf("Process::SetExitStatus (status=%i (0x%8.8x), description=%s%s%s)", 1455 status, status, 1456 cstr ? "\"" : "", 1457 cstr ? cstr : "NULL", 1458 cstr ? "\"" : ""); 1459 1460 // We were already in the exited state 1461 if (m_private_state.GetValue() == eStateExited) 1462 { 1463 if (log) 1464 log->Printf("Process::SetExitStatus () ignoring exit status because state was already set to eStateExited"); 1465 return false; 1466 } 1467 1468 m_exit_status = status; 1469 if (cstr) 1470 m_exit_string = cstr; 1471 else 1472 m_exit_string.clear(); 1473 1474 DidExit (); 1475 1476 SetPrivateState (eStateExited); 1477 return true; 1478 } 1479 1480 // This static callback can be used to watch for local child processes on 1481 // the current host. The the child process exits, the process will be 1482 // found in the global target list (we want to be completely sure that the 1483 // lldb_private::Process doesn't go away before we can deliver the signal. 1484 bool 1485 Process::SetProcessExitStatus (void *callback_baton, 1486 lldb::pid_t pid, 1487 bool exited, 1488 int signo, // Zero for no signal 1489 int exit_status // Exit value of process if signal is zero 1490 ) 1491 { 1492 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 1493 if (log) 1494 log->Printf ("Process::SetProcessExitStatus (baton=%p, pid=%" PRIu64 ", exited=%i, signal=%i, exit_status=%i)\n", 1495 callback_baton, 1496 pid, 1497 exited, 1498 signo, 1499 exit_status); 1500 1501 if (exited) 1502 { 1503 TargetSP target_sp(Debugger::FindTargetWithProcessID (pid)); 1504 if (target_sp) 1505 { 1506 ProcessSP process_sp (target_sp->GetProcessSP()); 1507 if (process_sp) 1508 { 1509 const char *signal_cstr = NULL; 1510 if (signo) 1511 signal_cstr = process_sp->GetUnixSignals().GetSignalAsCString (signo); 1512 1513 process_sp->SetExitStatus (exit_status, signal_cstr); 1514 } 1515 } 1516 return true; 1517 } 1518 return false; 1519 } 1520 1521 1522 void 1523 Process::UpdateThreadListIfNeeded () 1524 { 1525 const uint32_t stop_id = GetStopID(); 1526 if (m_thread_list.GetSize(false) == 0 || stop_id != m_thread_list.GetStopID()) 1527 { 1528 const StateType state = GetPrivateState(); 1529 if (StateIsStoppedState (state, true)) 1530 { 1531 Mutex::Locker locker (m_thread_list.GetMutex ()); 1532 // m_thread_list does have its own mutex, but we need to 1533 // hold onto the mutex between the call to UpdateThreadList(...) 1534 // and the os->UpdateThreadList(...) so it doesn't change on us 1535 ThreadList &old_thread_list = m_thread_list; 1536 ThreadList real_thread_list(this); 1537 ThreadList new_thread_list(this); 1538 // Always update the thread list with the protocol specific 1539 // thread list, but only update if "true" is returned 1540 if (UpdateThreadList (m_thread_list_real, real_thread_list)) 1541 { 1542 // Don't call into the OperatingSystem to update the thread list if we are shutting down, since 1543 // that may call back into the SBAPI's, requiring the API lock which is already held by whoever is 1544 // shutting us down, causing a deadlock. 1545 if (!m_destroy_in_process) 1546 { 1547 OperatingSystem *os = GetOperatingSystem (); 1548 if (os) 1549 { 1550 // Clear any old backing threads where memory threads might have been 1551 // backed by actual threads from the lldb_private::Process subclass 1552 size_t num_old_threads = old_thread_list.GetSize(false); 1553 for (size_t i=0; i<num_old_threads; ++i) 1554 old_thread_list.GetThreadAtIndex(i, false)->ClearBackingThread(); 1555 1556 // Now let the OperatingSystem plug-in update the thread list 1557 os->UpdateThreadList (old_thread_list, // Old list full of threads created by OS plug-in 1558 real_thread_list, // The actual thread list full of threads created by each lldb_private::Process subclass 1559 new_thread_list); // The new thread list that we will show to the user that gets filled in 1560 } 1561 else 1562 { 1563 // No OS plug-in, the new thread list is the same as the real thread list 1564 new_thread_list = real_thread_list; 1565 } 1566 } 1567 m_thread_list.Update (new_thread_list); 1568 m_thread_list.SetStopID (stop_id); 1569 } 1570 } 1571 } 1572 } 1573 1574 ThreadSP 1575 Process::CreateOSPluginThread (lldb::tid_t tid, lldb::addr_t context) 1576 { 1577 OperatingSystem *os = GetOperatingSystem (); 1578 if (os) 1579 return os->CreateThread(tid, context); 1580 return ThreadSP(); 1581 } 1582 1583 1584 1585 // This is obsoleted. Staged removal for Xcode. 1586 uint32_t 1587 Process::GetNextThreadIndexID () 1588 { 1589 return ++m_thread_index_id; 1590 } 1591 1592 uint32_t 1593 Process::GetNextThreadIndexID (uint64_t thread_id) 1594 { 1595 return AssignIndexIDToThread(thread_id); 1596 } 1597 1598 bool 1599 Process::HasAssignedIndexIDToThread(uint64_t thread_id) 1600 { 1601 std::map<uint64_t, uint32_t>::iterator iterator = m_thread_id_to_index_id_map.find(thread_id); 1602 if (iterator == m_thread_id_to_index_id_map.end()) 1603 { 1604 return false; 1605 } 1606 else 1607 { 1608 return true; 1609 } 1610 } 1611 1612 uint32_t 1613 Process::AssignIndexIDToThread(uint64_t thread_id) 1614 { 1615 uint32_t result = 0; 1616 std::map<uint64_t, uint32_t>::iterator iterator = m_thread_id_to_index_id_map.find(thread_id); 1617 if (iterator == m_thread_id_to_index_id_map.end()) 1618 { 1619 result = ++m_thread_index_id; 1620 m_thread_id_to_index_id_map[thread_id] = result; 1621 } 1622 else 1623 { 1624 result = iterator->second; 1625 } 1626 1627 return result; 1628 } 1629 1630 StateType 1631 Process::GetState() 1632 { 1633 // If any other threads access this we will need a mutex for it 1634 return m_public_state.GetValue (); 1635 } 1636 1637 void 1638 Process::SetPublicState (StateType new_state, bool restarted) 1639 { 1640 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1641 if (log) 1642 log->Printf("Process::SetPublicState (state = %s, restarted = %i)", StateAsCString(new_state), restarted); 1643 const StateType old_state = m_public_state.GetValue(); 1644 m_public_state.SetValue (new_state); 1645 1646 // On the transition from Run to Stopped, we unlock the writer end of the 1647 // run lock. The lock gets locked in Resume, which is the public API 1648 // to tell the program to run. 1649 if (!IsHijackedForEvent(eBroadcastBitStateChanged)) 1650 { 1651 if (new_state == eStateDetached) 1652 { 1653 if (log) 1654 log->Printf("Process::SetPublicState (%s) -- unlocking run lock for detach", StateAsCString(new_state)); 1655 m_public_run_lock.WriteUnlock(); 1656 } 1657 else 1658 { 1659 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1660 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1661 if ((old_state_is_stopped != new_state_is_stopped)) 1662 { 1663 if (new_state_is_stopped && !restarted) 1664 { 1665 if (log) 1666 log->Printf("Process::SetPublicState (%s) -- unlocking run lock", StateAsCString(new_state)); 1667 m_public_run_lock.WriteUnlock(); 1668 } 1669 } 1670 } 1671 } 1672 } 1673 1674 Error 1675 Process::Resume () 1676 { 1677 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1678 if (log) 1679 log->Printf("Process::Resume -- locking run lock"); 1680 if (!m_public_run_lock.WriteTryLock()) 1681 { 1682 Error error("Resume request failed - process still running."); 1683 if (log) 1684 log->Printf ("Process::Resume: -- WriteTryLock failed, not resuming."); 1685 return error; 1686 } 1687 return PrivateResume(); 1688 } 1689 1690 StateType 1691 Process::GetPrivateState () 1692 { 1693 return m_private_state.GetValue(); 1694 } 1695 1696 void 1697 Process::SetPrivateState (StateType new_state) 1698 { 1699 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1700 bool state_changed = false; 1701 1702 if (log) 1703 log->Printf("Process::SetPrivateState (%s)", StateAsCString(new_state)); 1704 1705 Mutex::Locker thread_locker(m_thread_list.GetMutex()); 1706 Mutex::Locker locker(m_private_state.GetMutex()); 1707 1708 const StateType old_state = m_private_state.GetValueNoLock (); 1709 state_changed = old_state != new_state; 1710 // This code is left commented out in case we ever need to control 1711 // the private process state with another run lock. Right now it doesn't 1712 // seem like we need to do this, but if we ever do, we can uncomment and 1713 // use this code. 1714 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1715 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1716 if (old_state_is_stopped != new_state_is_stopped) 1717 { 1718 if (new_state_is_stopped) 1719 m_private_run_lock.WriteUnlock(); 1720 else 1721 m_private_run_lock.WriteLock(); 1722 } 1723 1724 if (state_changed) 1725 { 1726 m_private_state.SetValueNoLock (new_state); 1727 if (StateIsStoppedState(new_state, false)) 1728 { 1729 // Note, this currently assumes that all threads in the list 1730 // stop when the process stops. In the future we will want to 1731 // support a debugging model where some threads continue to run 1732 // while others are stopped. When that happens we will either need 1733 // a way for the thread list to identify which threads are stopping 1734 // or create a special thread list containing only threads which 1735 // actually stopped. 1736 // 1737 // The process plugin is responsible for managing the actual 1738 // behavior of the threads and should have stopped any threads 1739 // that are going to stop before we get here. 1740 m_thread_list.DidStop(); 1741 1742 m_mod_id.BumpStopID(); 1743 m_memory_cache.Clear(); 1744 if (log) 1745 log->Printf("Process::SetPrivateState (%s) stop_id = %u", StateAsCString(new_state), m_mod_id.GetStopID()); 1746 } 1747 // Use our target to get a shared pointer to ourselves... 1748 if (m_finalize_called && PrivateStateThreadIsValid() == false) 1749 BroadcastEvent (eBroadcastBitStateChanged, new ProcessEventData (shared_from_this(), new_state)); 1750 else 1751 m_private_state_broadcaster.BroadcastEvent (eBroadcastBitStateChanged, new ProcessEventData (shared_from_this(), new_state)); 1752 } 1753 else 1754 { 1755 if (log) 1756 log->Printf("Process::SetPrivateState (%s) state didn't change. Ignoring...", StateAsCString(new_state)); 1757 } 1758 } 1759 1760 void 1761 Process::SetRunningUserExpression (bool on) 1762 { 1763 m_mod_id.SetRunningUserExpression (on); 1764 } 1765 1766 addr_t 1767 Process::GetImageInfoAddress() 1768 { 1769 return LLDB_INVALID_ADDRESS; 1770 } 1771 1772 //---------------------------------------------------------------------- 1773 // LoadImage 1774 // 1775 // This function provides a default implementation that works for most 1776 // unix variants. Any Process subclasses that need to do shared library 1777 // loading differently should override LoadImage and UnloadImage and 1778 // do what is needed. 1779 //---------------------------------------------------------------------- 1780 uint32_t 1781 Process::LoadImage (const FileSpec &image_spec, Error &error) 1782 { 1783 char path[PATH_MAX]; 1784 image_spec.GetPath(path, sizeof(path)); 1785 1786 DynamicLoader *loader = GetDynamicLoader(); 1787 if (loader) 1788 { 1789 error = loader->CanLoadImage(); 1790 if (error.Fail()) 1791 return LLDB_INVALID_IMAGE_TOKEN; 1792 } 1793 1794 if (error.Success()) 1795 { 1796 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 1797 1798 if (thread_sp) 1799 { 1800 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 1801 1802 if (frame_sp) 1803 { 1804 ExecutionContext exe_ctx; 1805 frame_sp->CalculateExecutionContext (exe_ctx); 1806 const bool unwind_on_error = true; 1807 const bool ignore_breakpoints = true; 1808 StreamString expr; 1809 expr.Printf("dlopen (\"%s\", 2)", path); 1810 const char *prefix = "extern \"C\" void* dlopen (const char *path, int mode);\n"; 1811 lldb::ValueObjectSP result_valobj_sp; 1812 ClangUserExpression::Evaluate (exe_ctx, 1813 eExecutionPolicyAlways, 1814 lldb::eLanguageTypeUnknown, 1815 ClangUserExpression::eResultTypeAny, 1816 unwind_on_error, 1817 ignore_breakpoints, 1818 expr.GetData(), 1819 prefix, 1820 result_valobj_sp, 1821 true, 1822 ClangUserExpression::kDefaultTimeout); 1823 error = result_valobj_sp->GetError(); 1824 if (error.Success()) 1825 { 1826 Scalar scalar; 1827 if (result_valobj_sp->ResolveValue (scalar)) 1828 { 1829 addr_t image_ptr = scalar.ULongLong(LLDB_INVALID_ADDRESS); 1830 if (image_ptr != 0 && image_ptr != LLDB_INVALID_ADDRESS) 1831 { 1832 uint32_t image_token = m_image_tokens.size(); 1833 m_image_tokens.push_back (image_ptr); 1834 return image_token; 1835 } 1836 } 1837 } 1838 } 1839 } 1840 } 1841 if (!error.AsCString()) 1842 error.SetErrorStringWithFormat("unable to load '%s'", path); 1843 return LLDB_INVALID_IMAGE_TOKEN; 1844 } 1845 1846 //---------------------------------------------------------------------- 1847 // UnloadImage 1848 // 1849 // This function provides a default implementation that works for most 1850 // unix variants. Any Process subclasses that need to do shared library 1851 // loading differently should override LoadImage and UnloadImage and 1852 // do what is needed. 1853 //---------------------------------------------------------------------- 1854 Error 1855 Process::UnloadImage (uint32_t image_token) 1856 { 1857 Error error; 1858 if (image_token < m_image_tokens.size()) 1859 { 1860 const addr_t image_addr = m_image_tokens[image_token]; 1861 if (image_addr == LLDB_INVALID_ADDRESS) 1862 { 1863 error.SetErrorString("image already unloaded"); 1864 } 1865 else 1866 { 1867 DynamicLoader *loader = GetDynamicLoader(); 1868 if (loader) 1869 error = loader->CanLoadImage(); 1870 1871 if (error.Success()) 1872 { 1873 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 1874 1875 if (thread_sp) 1876 { 1877 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 1878 1879 if (frame_sp) 1880 { 1881 ExecutionContext exe_ctx; 1882 frame_sp->CalculateExecutionContext (exe_ctx); 1883 const bool unwind_on_error = true; 1884 const bool ignore_breakpoints = true; 1885 StreamString expr; 1886 expr.Printf("dlclose ((void *)0x%" PRIx64 ")", image_addr); 1887 const char *prefix = "extern \"C\" int dlclose(void* handle);\n"; 1888 lldb::ValueObjectSP result_valobj_sp; 1889 ClangUserExpression::Evaluate (exe_ctx, 1890 eExecutionPolicyAlways, 1891 lldb::eLanguageTypeUnknown, 1892 ClangUserExpression::eResultTypeAny, 1893 unwind_on_error, 1894 ignore_breakpoints, 1895 expr.GetData(), 1896 prefix, 1897 result_valobj_sp, 1898 true, 1899 ClangUserExpression::kDefaultTimeout); 1900 if (result_valobj_sp->GetError().Success()) 1901 { 1902 Scalar scalar; 1903 if (result_valobj_sp->ResolveValue (scalar)) 1904 { 1905 if (scalar.UInt(1)) 1906 { 1907 error.SetErrorStringWithFormat("expression failed: \"%s\"", expr.GetData()); 1908 } 1909 else 1910 { 1911 m_image_tokens[image_token] = LLDB_INVALID_ADDRESS; 1912 } 1913 } 1914 } 1915 else 1916 { 1917 error = result_valobj_sp->GetError(); 1918 } 1919 } 1920 } 1921 } 1922 } 1923 } 1924 else 1925 { 1926 error.SetErrorString("invalid image token"); 1927 } 1928 return error; 1929 } 1930 1931 const lldb::ABISP & 1932 Process::GetABI() 1933 { 1934 if (!m_abi_sp) 1935 m_abi_sp = ABI::FindPlugin(m_target.GetArchitecture()); 1936 return m_abi_sp; 1937 } 1938 1939 LanguageRuntime * 1940 Process::GetLanguageRuntime(lldb::LanguageType language, bool retry_if_null) 1941 { 1942 LanguageRuntimeCollection::iterator pos; 1943 pos = m_language_runtimes.find (language); 1944 if (pos == m_language_runtimes.end() || (retry_if_null && !(*pos).second)) 1945 { 1946 lldb::LanguageRuntimeSP runtime_sp(LanguageRuntime::FindPlugin(this, language)); 1947 1948 m_language_runtimes[language] = runtime_sp; 1949 return runtime_sp.get(); 1950 } 1951 else 1952 return (*pos).second.get(); 1953 } 1954 1955 CPPLanguageRuntime * 1956 Process::GetCPPLanguageRuntime (bool retry_if_null) 1957 { 1958 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeC_plus_plus, retry_if_null); 1959 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeC_plus_plus) 1960 return static_cast<CPPLanguageRuntime *> (runtime); 1961 return NULL; 1962 } 1963 1964 ObjCLanguageRuntime * 1965 Process::GetObjCLanguageRuntime (bool retry_if_null) 1966 { 1967 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeObjC, retry_if_null); 1968 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeObjC) 1969 return static_cast<ObjCLanguageRuntime *> (runtime); 1970 return NULL; 1971 } 1972 1973 bool 1974 Process::IsPossibleDynamicValue (ValueObject& in_value) 1975 { 1976 if (in_value.IsDynamic()) 1977 return false; 1978 LanguageType known_type = in_value.GetObjectRuntimeLanguage(); 1979 1980 if (known_type != eLanguageTypeUnknown && known_type != eLanguageTypeC) 1981 { 1982 LanguageRuntime *runtime = GetLanguageRuntime (known_type); 1983 return runtime ? runtime->CouldHaveDynamicValue(in_value) : false; 1984 } 1985 1986 LanguageRuntime *cpp_runtime = GetLanguageRuntime (eLanguageTypeC_plus_plus); 1987 if (cpp_runtime && cpp_runtime->CouldHaveDynamicValue(in_value)) 1988 return true; 1989 1990 LanguageRuntime *objc_runtime = GetLanguageRuntime (eLanguageTypeObjC); 1991 return objc_runtime ? objc_runtime->CouldHaveDynamicValue(in_value) : false; 1992 } 1993 1994 BreakpointSiteList & 1995 Process::GetBreakpointSiteList() 1996 { 1997 return m_breakpoint_site_list; 1998 } 1999 2000 const BreakpointSiteList & 2001 Process::GetBreakpointSiteList() const 2002 { 2003 return m_breakpoint_site_list; 2004 } 2005 2006 2007 void 2008 Process::DisableAllBreakpointSites () 2009 { 2010 m_breakpoint_site_list.ForEach([this](BreakpointSite *bp_site) -> void { 2011 // bp_site->SetEnabled(true); 2012 DisableBreakpointSite(bp_site); 2013 }); 2014 } 2015 2016 Error 2017 Process::ClearBreakpointSiteByID (lldb::user_id_t break_id) 2018 { 2019 Error error (DisableBreakpointSiteByID (break_id)); 2020 2021 if (error.Success()) 2022 m_breakpoint_site_list.Remove(break_id); 2023 2024 return error; 2025 } 2026 2027 Error 2028 Process::DisableBreakpointSiteByID (lldb::user_id_t break_id) 2029 { 2030 Error error; 2031 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2032 if (bp_site_sp) 2033 { 2034 if (bp_site_sp->IsEnabled()) 2035 error = DisableBreakpointSite (bp_site_sp.get()); 2036 } 2037 else 2038 { 2039 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2040 } 2041 2042 return error; 2043 } 2044 2045 Error 2046 Process::EnableBreakpointSiteByID (lldb::user_id_t break_id) 2047 { 2048 Error error; 2049 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2050 if (bp_site_sp) 2051 { 2052 if (!bp_site_sp->IsEnabled()) 2053 error = EnableBreakpointSite (bp_site_sp.get()); 2054 } 2055 else 2056 { 2057 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2058 } 2059 return error; 2060 } 2061 2062 lldb::break_id_t 2063 Process::CreateBreakpointSite (const BreakpointLocationSP &owner, bool use_hardware) 2064 { 2065 const addr_t load_addr = owner->GetAddress().GetOpcodeLoadAddress (&m_target); 2066 if (load_addr != LLDB_INVALID_ADDRESS) 2067 { 2068 BreakpointSiteSP bp_site_sp; 2069 2070 // Look up this breakpoint site. If it exists, then add this new owner, otherwise 2071 // create a new breakpoint site and add it. 2072 2073 bp_site_sp = m_breakpoint_site_list.FindByAddress (load_addr); 2074 2075 if (bp_site_sp) 2076 { 2077 bp_site_sp->AddOwner (owner); 2078 owner->SetBreakpointSite (bp_site_sp); 2079 return bp_site_sp->GetID(); 2080 } 2081 else 2082 { 2083 bp_site_sp.reset (new BreakpointSite (&m_breakpoint_site_list, owner, load_addr, use_hardware)); 2084 if (bp_site_sp) 2085 { 2086 if (EnableBreakpointSite (bp_site_sp.get()).Success()) 2087 { 2088 owner->SetBreakpointSite (bp_site_sp); 2089 return m_breakpoint_site_list.Add (bp_site_sp); 2090 } 2091 } 2092 } 2093 } 2094 // We failed to enable the breakpoint 2095 return LLDB_INVALID_BREAK_ID; 2096 2097 } 2098 2099 void 2100 Process::RemoveOwnerFromBreakpointSite (lldb::user_id_t owner_id, lldb::user_id_t owner_loc_id, BreakpointSiteSP &bp_site_sp) 2101 { 2102 uint32_t num_owners = bp_site_sp->RemoveOwner (owner_id, owner_loc_id); 2103 if (num_owners == 0) 2104 { 2105 // Don't try to disable the site if we don't have a live process anymore. 2106 if (IsAlive()) 2107 DisableBreakpointSite (bp_site_sp.get()); 2108 m_breakpoint_site_list.RemoveByAddress(bp_site_sp->GetLoadAddress()); 2109 } 2110 } 2111 2112 2113 size_t 2114 Process::RemoveBreakpointOpcodesFromBuffer (addr_t bp_addr, size_t size, uint8_t *buf) const 2115 { 2116 size_t bytes_removed = 0; 2117 BreakpointSiteList bp_sites_in_range; 2118 2119 if (m_breakpoint_site_list.FindInRange (bp_addr, bp_addr + size, bp_sites_in_range)) 2120 { 2121 bp_sites_in_range.ForEach([bp_addr, size, buf, &bytes_removed](BreakpointSite *bp_site) -> void { 2122 if (bp_site->GetType() == BreakpointSite::eSoftware) 2123 { 2124 addr_t intersect_addr; 2125 size_t intersect_size; 2126 size_t opcode_offset; 2127 if (bp_site->IntersectsRange(bp_addr, size, &intersect_addr, &intersect_size, &opcode_offset)) 2128 { 2129 assert(bp_addr <= intersect_addr && intersect_addr < bp_addr + size); 2130 assert(bp_addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= bp_addr + size); 2131 assert(opcode_offset + intersect_size <= bp_site->GetByteSize()); 2132 size_t buf_offset = intersect_addr - bp_addr; 2133 ::memcpy(buf + buf_offset, bp_site->GetSavedOpcodeBytes() + opcode_offset, intersect_size); 2134 } 2135 } 2136 }); 2137 } 2138 return bytes_removed; 2139 } 2140 2141 2142 2143 size_t 2144 Process::GetSoftwareBreakpointTrapOpcode (BreakpointSite* bp_site) 2145 { 2146 PlatformSP platform_sp (m_target.GetPlatform()); 2147 if (platform_sp) 2148 return platform_sp->GetSoftwareBreakpointTrapOpcode (m_target, bp_site); 2149 return 0; 2150 } 2151 2152 Error 2153 Process::EnableSoftwareBreakpoint (BreakpointSite *bp_site) 2154 { 2155 Error error; 2156 assert (bp_site != NULL); 2157 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2158 const addr_t bp_addr = bp_site->GetLoadAddress(); 2159 if (log) 2160 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64, bp_site->GetID(), (uint64_t)bp_addr); 2161 if (bp_site->IsEnabled()) 2162 { 2163 if (log) 2164 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already enabled", bp_site->GetID(), (uint64_t)bp_addr); 2165 return error; 2166 } 2167 2168 if (bp_addr == LLDB_INVALID_ADDRESS) 2169 { 2170 error.SetErrorString("BreakpointSite contains an invalid load address."); 2171 return error; 2172 } 2173 // Ask the lldb::Process subclass to fill in the correct software breakpoint 2174 // trap for the breakpoint site 2175 const size_t bp_opcode_size = GetSoftwareBreakpointTrapOpcode(bp_site); 2176 2177 if (bp_opcode_size == 0) 2178 { 2179 error.SetErrorStringWithFormat ("Process::GetSoftwareBreakpointTrapOpcode() returned zero, unable to get breakpoint trap for address 0x%" PRIx64, bp_addr); 2180 } 2181 else 2182 { 2183 const uint8_t * const bp_opcode_bytes = bp_site->GetTrapOpcodeBytes(); 2184 2185 if (bp_opcode_bytes == NULL) 2186 { 2187 error.SetErrorString ("BreakpointSite doesn't contain a valid breakpoint trap opcode."); 2188 return error; 2189 } 2190 2191 // Save the original opcode by reading it 2192 if (DoReadMemory(bp_addr, bp_site->GetSavedOpcodeBytes(), bp_opcode_size, error) == bp_opcode_size) 2193 { 2194 // Write a software breakpoint in place of the original opcode 2195 if (DoWriteMemory(bp_addr, bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2196 { 2197 uint8_t verify_bp_opcode_bytes[64]; 2198 if (DoReadMemory(bp_addr, verify_bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2199 { 2200 if (::memcmp(bp_opcode_bytes, verify_bp_opcode_bytes, bp_opcode_size) == 0) 2201 { 2202 bp_site->SetEnabled(true); 2203 bp_site->SetType (BreakpointSite::eSoftware); 2204 if (log) 2205 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", 2206 bp_site->GetID(), 2207 (uint64_t)bp_addr); 2208 } 2209 else 2210 error.SetErrorString("failed to verify the breakpoint trap in memory."); 2211 } 2212 else 2213 error.SetErrorString("Unable to read memory to verify breakpoint trap."); 2214 } 2215 else 2216 error.SetErrorString("Unable to write breakpoint trap to memory."); 2217 } 2218 else 2219 error.SetErrorString("Unable to read memory at breakpoint address."); 2220 } 2221 if (log && error.Fail()) 2222 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2223 bp_site->GetID(), 2224 (uint64_t)bp_addr, 2225 error.AsCString()); 2226 return error; 2227 } 2228 2229 Error 2230 Process::DisableSoftwareBreakpoint (BreakpointSite *bp_site) 2231 { 2232 Error error; 2233 assert (bp_site != NULL); 2234 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2235 addr_t bp_addr = bp_site->GetLoadAddress(); 2236 lldb::user_id_t breakID = bp_site->GetID(); 2237 if (log) 2238 log->Printf ("Process::DisableSoftwareBreakpoint (breakID = %" PRIu64 ") addr = 0x%" PRIx64, breakID, (uint64_t)bp_addr); 2239 2240 if (bp_site->IsHardware()) 2241 { 2242 error.SetErrorString("Breakpoint site is a hardware breakpoint."); 2243 } 2244 else if (bp_site->IsEnabled()) 2245 { 2246 const size_t break_op_size = bp_site->GetByteSize(); 2247 const uint8_t * const break_op = bp_site->GetTrapOpcodeBytes(); 2248 if (break_op_size > 0) 2249 { 2250 // Clear a software breakoint instruction 2251 uint8_t curr_break_op[8]; 2252 assert (break_op_size <= sizeof(curr_break_op)); 2253 bool break_op_found = false; 2254 2255 // Read the breakpoint opcode 2256 if (DoReadMemory (bp_addr, curr_break_op, break_op_size, error) == break_op_size) 2257 { 2258 bool verify = false; 2259 // Make sure we have the a breakpoint opcode exists at this address 2260 if (::memcmp (curr_break_op, break_op, break_op_size) == 0) 2261 { 2262 break_op_found = true; 2263 // We found a valid breakpoint opcode at this address, now restore 2264 // the saved opcode. 2265 if (DoWriteMemory (bp_addr, bp_site->GetSavedOpcodeBytes(), break_op_size, error) == break_op_size) 2266 { 2267 verify = true; 2268 } 2269 else 2270 error.SetErrorString("Memory write failed when restoring original opcode."); 2271 } 2272 else 2273 { 2274 error.SetErrorString("Original breakpoint trap is no longer in memory."); 2275 // Set verify to true and so we can check if the original opcode has already been restored 2276 verify = true; 2277 } 2278 2279 if (verify) 2280 { 2281 uint8_t verify_opcode[8]; 2282 assert (break_op_size < sizeof(verify_opcode)); 2283 // Verify that our original opcode made it back to the inferior 2284 if (DoReadMemory (bp_addr, verify_opcode, break_op_size, error) == break_op_size) 2285 { 2286 // compare the memory we just read with the original opcode 2287 if (::memcmp (bp_site->GetSavedOpcodeBytes(), verify_opcode, break_op_size) == 0) 2288 { 2289 // SUCCESS 2290 bp_site->SetEnabled(false); 2291 if (log) 2292 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", bp_site->GetID(), (uint64_t)bp_addr); 2293 return error; 2294 } 2295 else 2296 { 2297 if (break_op_found) 2298 error.SetErrorString("Failed to restore original opcode."); 2299 } 2300 } 2301 else 2302 error.SetErrorString("Failed to read memory to verify that breakpoint trap was restored."); 2303 } 2304 } 2305 else 2306 error.SetErrorString("Unable to read memory that should contain the breakpoint trap."); 2307 } 2308 } 2309 else 2310 { 2311 if (log) 2312 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already disabled", bp_site->GetID(), (uint64_t)bp_addr); 2313 return error; 2314 } 2315 2316 if (log) 2317 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2318 bp_site->GetID(), 2319 (uint64_t)bp_addr, 2320 error.AsCString()); 2321 return error; 2322 2323 } 2324 2325 // Uncomment to verify memory caching works after making changes to caching code 2326 //#define VERIFY_MEMORY_READS 2327 2328 size_t 2329 Process::ReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2330 { 2331 if (!GetDisableMemoryCache()) 2332 { 2333 #if defined (VERIFY_MEMORY_READS) 2334 // Memory caching is enabled, with debug verification 2335 2336 if (buf && size) 2337 { 2338 // Uncomment the line below to make sure memory caching is working. 2339 // I ran this through the test suite and got no assertions, so I am 2340 // pretty confident this is working well. If any changes are made to 2341 // memory caching, uncomment the line below and test your changes! 2342 2343 // Verify all memory reads by using the cache first, then redundantly 2344 // reading the same memory from the inferior and comparing to make sure 2345 // everything is exactly the same. 2346 std::string verify_buf (size, '\0'); 2347 assert (verify_buf.size() == size); 2348 const size_t cache_bytes_read = m_memory_cache.Read (this, addr, buf, size, error); 2349 Error verify_error; 2350 const size_t verify_bytes_read = ReadMemoryFromInferior (addr, const_cast<char *>(verify_buf.data()), verify_buf.size(), verify_error); 2351 assert (cache_bytes_read == verify_bytes_read); 2352 assert (memcmp(buf, verify_buf.data(), verify_buf.size()) == 0); 2353 assert (verify_error.Success() == error.Success()); 2354 return cache_bytes_read; 2355 } 2356 return 0; 2357 #else // !defined(VERIFY_MEMORY_READS) 2358 // Memory caching is enabled, without debug verification 2359 2360 return m_memory_cache.Read (addr, buf, size, error); 2361 #endif // defined (VERIFY_MEMORY_READS) 2362 } 2363 else 2364 { 2365 // Memory caching is disabled 2366 2367 return ReadMemoryFromInferior (addr, buf, size, error); 2368 } 2369 } 2370 2371 size_t 2372 Process::ReadCStringFromMemory (addr_t addr, std::string &out_str, Error &error) 2373 { 2374 char buf[256]; 2375 out_str.clear(); 2376 addr_t curr_addr = addr; 2377 while (1) 2378 { 2379 size_t length = ReadCStringFromMemory (curr_addr, buf, sizeof(buf), error); 2380 if (length == 0) 2381 break; 2382 out_str.append(buf, length); 2383 // If we got "length - 1" bytes, we didn't get the whole C string, we 2384 // need to read some more characters 2385 if (length == sizeof(buf) - 1) 2386 curr_addr += length; 2387 else 2388 break; 2389 } 2390 return out_str.size(); 2391 } 2392 2393 2394 size_t 2395 Process::ReadStringFromMemory (addr_t addr, char *dst, size_t max_bytes, Error &error, 2396 size_t type_width) 2397 { 2398 size_t total_bytes_read = 0; 2399 if (dst && max_bytes && type_width && max_bytes >= type_width) 2400 { 2401 // Ensure a null terminator independent of the number of bytes that is read. 2402 memset (dst, 0, max_bytes); 2403 size_t bytes_left = max_bytes - type_width; 2404 2405 const char terminator[4] = {'\0', '\0', '\0', '\0'}; 2406 assert(sizeof(terminator) >= type_width && 2407 "Attempting to validate a string with more than 4 bytes per character!"); 2408 2409 addr_t curr_addr = addr; 2410 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2411 char *curr_dst = dst; 2412 2413 error.Clear(); 2414 while (bytes_left > 0 && error.Success()) 2415 { 2416 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2417 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2418 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2419 2420 if (bytes_read == 0) 2421 break; 2422 2423 // Search for a null terminator of correct size and alignment in bytes_read 2424 size_t aligned_start = total_bytes_read - total_bytes_read % type_width; 2425 for (size_t i = aligned_start; i + type_width <= total_bytes_read + bytes_read; i += type_width) 2426 if (::strncmp(&dst[i], terminator, type_width) == 0) 2427 { 2428 error.Clear(); 2429 return i; 2430 } 2431 2432 total_bytes_read += bytes_read; 2433 curr_dst += bytes_read; 2434 curr_addr += bytes_read; 2435 bytes_left -= bytes_read; 2436 } 2437 } 2438 else 2439 { 2440 if (max_bytes) 2441 error.SetErrorString("invalid arguments"); 2442 } 2443 return total_bytes_read; 2444 } 2445 2446 // Deprecated in favor of ReadStringFromMemory which has wchar support and correct code to find 2447 // null terminators. 2448 size_t 2449 Process::ReadCStringFromMemory (addr_t addr, char *dst, size_t dst_max_len, Error &result_error) 2450 { 2451 size_t total_cstr_len = 0; 2452 if (dst && dst_max_len) 2453 { 2454 result_error.Clear(); 2455 // NULL out everything just to be safe 2456 memset (dst, 0, dst_max_len); 2457 Error error; 2458 addr_t curr_addr = addr; 2459 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2460 size_t bytes_left = dst_max_len - 1; 2461 char *curr_dst = dst; 2462 2463 while (bytes_left > 0) 2464 { 2465 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2466 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2467 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2468 2469 if (bytes_read == 0) 2470 { 2471 result_error = error; 2472 dst[total_cstr_len] = '\0'; 2473 break; 2474 } 2475 const size_t len = strlen(curr_dst); 2476 2477 total_cstr_len += len; 2478 2479 if (len < bytes_to_read) 2480 break; 2481 2482 curr_dst += bytes_read; 2483 curr_addr += bytes_read; 2484 bytes_left -= bytes_read; 2485 } 2486 } 2487 else 2488 { 2489 if (dst == NULL) 2490 result_error.SetErrorString("invalid arguments"); 2491 else 2492 result_error.Clear(); 2493 } 2494 return total_cstr_len; 2495 } 2496 2497 size_t 2498 Process::ReadMemoryFromInferior (addr_t addr, void *buf, size_t size, Error &error) 2499 { 2500 if (buf == NULL || size == 0) 2501 return 0; 2502 2503 size_t bytes_read = 0; 2504 uint8_t *bytes = (uint8_t *)buf; 2505 2506 while (bytes_read < size) 2507 { 2508 const size_t curr_size = size - bytes_read; 2509 const size_t curr_bytes_read = DoReadMemory (addr + bytes_read, 2510 bytes + bytes_read, 2511 curr_size, 2512 error); 2513 bytes_read += curr_bytes_read; 2514 if (curr_bytes_read == curr_size || curr_bytes_read == 0) 2515 break; 2516 } 2517 2518 // Replace any software breakpoint opcodes that fall into this range back 2519 // into "buf" before we return 2520 if (bytes_read > 0) 2521 RemoveBreakpointOpcodesFromBuffer (addr, bytes_read, (uint8_t *)buf); 2522 return bytes_read; 2523 } 2524 2525 uint64_t 2526 Process::ReadUnsignedIntegerFromMemory (lldb::addr_t vm_addr, size_t integer_byte_size, uint64_t fail_value, Error &error) 2527 { 2528 Scalar scalar; 2529 if (ReadScalarIntegerFromMemory(vm_addr, integer_byte_size, false, scalar, error)) 2530 return scalar.ULongLong(fail_value); 2531 return fail_value; 2532 } 2533 2534 addr_t 2535 Process::ReadPointerFromMemory (lldb::addr_t vm_addr, Error &error) 2536 { 2537 Scalar scalar; 2538 if (ReadScalarIntegerFromMemory(vm_addr, GetAddressByteSize(), false, scalar, error)) 2539 return scalar.ULongLong(LLDB_INVALID_ADDRESS); 2540 return LLDB_INVALID_ADDRESS; 2541 } 2542 2543 2544 bool 2545 Process::WritePointerToMemory (lldb::addr_t vm_addr, 2546 lldb::addr_t ptr_value, 2547 Error &error) 2548 { 2549 Scalar scalar; 2550 const uint32_t addr_byte_size = GetAddressByteSize(); 2551 if (addr_byte_size <= 4) 2552 scalar = (uint32_t)ptr_value; 2553 else 2554 scalar = ptr_value; 2555 return WriteScalarToMemory(vm_addr, scalar, addr_byte_size, error) == addr_byte_size; 2556 } 2557 2558 size_t 2559 Process::WriteMemoryPrivate (addr_t addr, const void *buf, size_t size, Error &error) 2560 { 2561 size_t bytes_written = 0; 2562 const uint8_t *bytes = (const uint8_t *)buf; 2563 2564 while (bytes_written < size) 2565 { 2566 const size_t curr_size = size - bytes_written; 2567 const size_t curr_bytes_written = DoWriteMemory (addr + bytes_written, 2568 bytes + bytes_written, 2569 curr_size, 2570 error); 2571 bytes_written += curr_bytes_written; 2572 if (curr_bytes_written == curr_size || curr_bytes_written == 0) 2573 break; 2574 } 2575 return bytes_written; 2576 } 2577 2578 size_t 2579 Process::WriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2580 { 2581 #if defined (ENABLE_MEMORY_CACHING) 2582 m_memory_cache.Flush (addr, size); 2583 #endif 2584 2585 if (buf == NULL || size == 0) 2586 return 0; 2587 2588 m_mod_id.BumpMemoryID(); 2589 2590 // We need to write any data that would go where any current software traps 2591 // (enabled software breakpoints) any software traps (breakpoints) that we 2592 // may have placed in our tasks memory. 2593 2594 BreakpointSiteList bp_sites_in_range; 2595 2596 if (m_breakpoint_site_list.FindInRange (addr, addr + size, bp_sites_in_range)) 2597 { 2598 // No breakpoint sites overlap 2599 if (bp_sites_in_range.IsEmpty()) 2600 return WriteMemoryPrivate (addr, buf, size, error); 2601 else 2602 { 2603 const uint8_t *ubuf = (const uint8_t *)buf; 2604 uint64_t bytes_written = 0; 2605 2606 bp_sites_in_range.ForEach([this, addr, size, &bytes_written, &ubuf, &error](BreakpointSite *bp) -> void { 2607 2608 if (error.Success()) 2609 { 2610 addr_t intersect_addr; 2611 size_t intersect_size; 2612 size_t opcode_offset; 2613 const bool intersects = bp->IntersectsRange(addr, size, &intersect_addr, &intersect_size, &opcode_offset); 2614 assert(intersects); 2615 assert(addr <= intersect_addr && intersect_addr < addr + size); 2616 assert(addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= addr + size); 2617 assert(opcode_offset + intersect_size <= bp->GetByteSize()); 2618 2619 // Check for bytes before this breakpoint 2620 const addr_t curr_addr = addr + bytes_written; 2621 if (intersect_addr > curr_addr) 2622 { 2623 // There are some bytes before this breakpoint that we need to 2624 // just write to memory 2625 size_t curr_size = intersect_addr - curr_addr; 2626 size_t curr_bytes_written = WriteMemoryPrivate (curr_addr, 2627 ubuf + bytes_written, 2628 curr_size, 2629 error); 2630 bytes_written += curr_bytes_written; 2631 if (curr_bytes_written != curr_size) 2632 { 2633 // We weren't able to write all of the requested bytes, we 2634 // are done looping and will return the number of bytes that 2635 // we have written so far. 2636 if (error.Success()) 2637 error.SetErrorToGenericError(); 2638 } 2639 } 2640 // Now write any bytes that would cover up any software breakpoints 2641 // directly into the breakpoint opcode buffer 2642 ::memcpy(bp->GetSavedOpcodeBytes() + opcode_offset, ubuf + bytes_written, intersect_size); 2643 bytes_written += intersect_size; 2644 } 2645 }); 2646 2647 if (bytes_written < size) 2648 bytes_written += WriteMemoryPrivate (addr + bytes_written, 2649 ubuf + bytes_written, 2650 size - bytes_written, 2651 error); 2652 } 2653 } 2654 else 2655 { 2656 return WriteMemoryPrivate (addr, buf, size, error); 2657 } 2658 2659 // Write any remaining bytes after the last breakpoint if we have any left 2660 return 0; //bytes_written; 2661 } 2662 2663 size_t 2664 Process::WriteScalarToMemory (addr_t addr, const Scalar &scalar, size_t byte_size, Error &error) 2665 { 2666 if (byte_size == UINT32_MAX) 2667 byte_size = scalar.GetByteSize(); 2668 if (byte_size > 0) 2669 { 2670 uint8_t buf[32]; 2671 const size_t mem_size = scalar.GetAsMemoryData (buf, byte_size, GetByteOrder(), error); 2672 if (mem_size > 0) 2673 return WriteMemory(addr, buf, mem_size, error); 2674 else 2675 error.SetErrorString ("failed to get scalar as memory data"); 2676 } 2677 else 2678 { 2679 error.SetErrorString ("invalid scalar value"); 2680 } 2681 return 0; 2682 } 2683 2684 size_t 2685 Process::ReadScalarIntegerFromMemory (addr_t addr, 2686 uint32_t byte_size, 2687 bool is_signed, 2688 Scalar &scalar, 2689 Error &error) 2690 { 2691 uint64_t uval = 0; 2692 if (byte_size == 0) 2693 { 2694 error.SetErrorString ("byte size is zero"); 2695 } 2696 else if (byte_size & (byte_size - 1)) 2697 { 2698 error.SetErrorStringWithFormat ("byte size %u is not a power of 2", byte_size); 2699 } 2700 else if (byte_size <= sizeof(uval)) 2701 { 2702 const size_t bytes_read = ReadMemory (addr, &uval, byte_size, error); 2703 if (bytes_read == byte_size) 2704 { 2705 DataExtractor data (&uval, sizeof(uval), GetByteOrder(), GetAddressByteSize()); 2706 lldb::offset_t offset = 0; 2707 if (byte_size <= 4) 2708 scalar = data.GetMaxU32 (&offset, byte_size); 2709 else 2710 scalar = data.GetMaxU64 (&offset, byte_size); 2711 if (is_signed) 2712 scalar.SignExtend(byte_size * 8); 2713 return bytes_read; 2714 } 2715 } 2716 else 2717 { 2718 error.SetErrorStringWithFormat ("byte size of %u is too large for integer scalar type", byte_size); 2719 } 2720 return 0; 2721 } 2722 2723 #define USE_ALLOCATE_MEMORY_CACHE 1 2724 addr_t 2725 Process::AllocateMemory(size_t size, uint32_t permissions, Error &error) 2726 { 2727 if (GetPrivateState() != eStateStopped) 2728 return LLDB_INVALID_ADDRESS; 2729 2730 #if defined (USE_ALLOCATE_MEMORY_CACHE) 2731 return m_allocated_memory_cache.AllocateMemory(size, permissions, error); 2732 #else 2733 addr_t allocated_addr = DoAllocateMemory (size, permissions, error); 2734 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2735 if (log) 2736 log->Printf("Process::AllocateMemory(size=%4zu, permissions=%s) => 0x%16.16" PRIx64 " (m_stop_id = %u m_memory_id = %u)", 2737 size, 2738 GetPermissionsAsCString (permissions), 2739 (uint64_t)allocated_addr, 2740 m_mod_id.GetStopID(), 2741 m_mod_id.GetMemoryID()); 2742 return allocated_addr; 2743 #endif 2744 } 2745 2746 bool 2747 Process::CanJIT () 2748 { 2749 if (m_can_jit == eCanJITDontKnow) 2750 { 2751 Error err; 2752 2753 uint64_t allocated_memory = AllocateMemory(8, 2754 ePermissionsReadable | ePermissionsWritable | ePermissionsExecutable, 2755 err); 2756 2757 if (err.Success()) 2758 m_can_jit = eCanJITYes; 2759 else 2760 m_can_jit = eCanJITNo; 2761 2762 DeallocateMemory (allocated_memory); 2763 } 2764 2765 return m_can_jit == eCanJITYes; 2766 } 2767 2768 void 2769 Process::SetCanJIT (bool can_jit) 2770 { 2771 m_can_jit = (can_jit ? eCanJITYes : eCanJITNo); 2772 } 2773 2774 Error 2775 Process::DeallocateMemory (addr_t ptr) 2776 { 2777 Error error; 2778 #if defined (USE_ALLOCATE_MEMORY_CACHE) 2779 if (!m_allocated_memory_cache.DeallocateMemory(ptr)) 2780 { 2781 error.SetErrorStringWithFormat ("deallocation of memory at 0x%" PRIx64 " failed.", (uint64_t)ptr); 2782 } 2783 #else 2784 error = DoDeallocateMemory (ptr); 2785 2786 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2787 if (log) 2788 log->Printf("Process::DeallocateMemory(addr=0x%16.16" PRIx64 ") => err = %s (m_stop_id = %u, m_memory_id = %u)", 2789 ptr, 2790 error.AsCString("SUCCESS"), 2791 m_mod_id.GetStopID(), 2792 m_mod_id.GetMemoryID()); 2793 #endif 2794 return error; 2795 } 2796 2797 2798 ModuleSP 2799 Process::ReadModuleFromMemory (const FileSpec& file_spec, 2800 lldb::addr_t header_addr) 2801 { 2802 ModuleSP module_sp (new Module (file_spec, ArchSpec())); 2803 if (module_sp) 2804 { 2805 Error error; 2806 ObjectFile *objfile = module_sp->GetMemoryObjectFile (shared_from_this(), header_addr, error); 2807 if (objfile) 2808 return module_sp; 2809 } 2810 return ModuleSP(); 2811 } 2812 2813 Error 2814 Process::EnableWatchpoint (Watchpoint *watchpoint, bool notify) 2815 { 2816 Error error; 2817 error.SetErrorString("watchpoints are not supported"); 2818 return error; 2819 } 2820 2821 Error 2822 Process::DisableWatchpoint (Watchpoint *watchpoint, bool notify) 2823 { 2824 Error error; 2825 error.SetErrorString("watchpoints are not supported"); 2826 return error; 2827 } 2828 2829 StateType 2830 Process::WaitForProcessStopPrivate (const TimeValue *timeout, EventSP &event_sp) 2831 { 2832 StateType state; 2833 // Now wait for the process to launch and return control to us, and then 2834 // call DidLaunch: 2835 while (1) 2836 { 2837 event_sp.reset(); 2838 state = WaitForStateChangedEventsPrivate (timeout, event_sp); 2839 2840 if (StateIsStoppedState(state, false)) 2841 break; 2842 2843 // If state is invalid, then we timed out 2844 if (state == eStateInvalid) 2845 break; 2846 2847 if (event_sp) 2848 HandlePrivateEvent (event_sp); 2849 } 2850 return state; 2851 } 2852 2853 Error 2854 Process::Launch (const ProcessLaunchInfo &launch_info) 2855 { 2856 Error error; 2857 m_abi_sp.reset(); 2858 m_dyld_ap.reset(); 2859 m_os_ap.reset(); 2860 m_process_input_reader.reset(); 2861 2862 Module *exe_module = m_target.GetExecutableModulePointer(); 2863 if (exe_module) 2864 { 2865 char local_exec_file_path[PATH_MAX]; 2866 char platform_exec_file_path[PATH_MAX]; 2867 exe_module->GetFileSpec().GetPath(local_exec_file_path, sizeof(local_exec_file_path)); 2868 exe_module->GetPlatformFileSpec().GetPath(platform_exec_file_path, sizeof(platform_exec_file_path)); 2869 if (exe_module->GetFileSpec().Exists()) 2870 { 2871 if (PrivateStateThreadIsValid ()) 2872 PausePrivateStateThread (); 2873 2874 error = WillLaunch (exe_module); 2875 if (error.Success()) 2876 { 2877 const bool restarted = false; 2878 SetPublicState (eStateLaunching, restarted); 2879 m_should_detach = false; 2880 2881 if (m_public_run_lock.WriteTryLock()) 2882 { 2883 // Now launch using these arguments. 2884 error = DoLaunch (exe_module, launch_info); 2885 } 2886 else 2887 { 2888 // This shouldn't happen 2889 error.SetErrorString("failed to acquire process run lock"); 2890 } 2891 2892 if (error.Fail()) 2893 { 2894 if (GetID() != LLDB_INVALID_PROCESS_ID) 2895 { 2896 SetID (LLDB_INVALID_PROCESS_ID); 2897 const char *error_string = error.AsCString(); 2898 if (error_string == NULL) 2899 error_string = "launch failed"; 2900 SetExitStatus (-1, error_string); 2901 } 2902 } 2903 else 2904 { 2905 EventSP event_sp; 2906 TimeValue timeout_time; 2907 timeout_time = TimeValue::Now(); 2908 timeout_time.OffsetWithSeconds(10); 2909 StateType state = WaitForProcessStopPrivate(&timeout_time, event_sp); 2910 2911 if (state == eStateInvalid || event_sp.get() == NULL) 2912 { 2913 // We were able to launch the process, but we failed to 2914 // catch the initial stop. 2915 SetExitStatus (0, "failed to catch stop after launch"); 2916 Destroy(); 2917 } 2918 else if (state == eStateStopped || state == eStateCrashed) 2919 { 2920 2921 DidLaunch (); 2922 2923 DynamicLoader *dyld = GetDynamicLoader (); 2924 if (dyld) 2925 dyld->DidLaunch(); 2926 2927 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 2928 // This delays passing the stopped event to listeners till DidLaunch gets 2929 // a chance to complete... 2930 HandlePrivateEvent (event_sp); 2931 2932 if (PrivateStateThreadIsValid ()) 2933 ResumePrivateStateThread (); 2934 else 2935 StartPrivateStateThread (); 2936 } 2937 else if (state == eStateExited) 2938 { 2939 // We exited while trying to launch somehow. Don't call DidLaunch as that's 2940 // not likely to work, and return an invalid pid. 2941 HandlePrivateEvent (event_sp); 2942 } 2943 } 2944 } 2945 } 2946 else 2947 { 2948 error.SetErrorStringWithFormat("file doesn't exist: '%s'", local_exec_file_path); 2949 } 2950 } 2951 return error; 2952 } 2953 2954 2955 Error 2956 Process::LoadCore () 2957 { 2958 Error error = DoLoadCore(); 2959 if (error.Success()) 2960 { 2961 if (PrivateStateThreadIsValid ()) 2962 ResumePrivateStateThread (); 2963 else 2964 StartPrivateStateThread (); 2965 2966 DynamicLoader *dyld = GetDynamicLoader (); 2967 if (dyld) 2968 dyld->DidAttach(); 2969 2970 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 2971 // We successfully loaded a core file, now pretend we stopped so we can 2972 // show all of the threads in the core file and explore the crashed 2973 // state. 2974 SetPrivateState (eStateStopped); 2975 2976 } 2977 return error; 2978 } 2979 2980 DynamicLoader * 2981 Process::GetDynamicLoader () 2982 { 2983 if (m_dyld_ap.get() == NULL) 2984 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 2985 return m_dyld_ap.get(); 2986 } 2987 2988 2989 Process::NextEventAction::EventActionResult 2990 Process::AttachCompletionHandler::PerformAction (lldb::EventSP &event_sp) 2991 { 2992 StateType state = ProcessEventData::GetStateFromEvent (event_sp.get()); 2993 switch (state) 2994 { 2995 case eStateRunning: 2996 case eStateConnected: 2997 return eEventActionRetry; 2998 2999 case eStateStopped: 3000 case eStateCrashed: 3001 { 3002 // During attach, prior to sending the eStateStopped event, 3003 // lldb_private::Process subclasses must set the new process ID. 3004 assert (m_process->GetID() != LLDB_INVALID_PROCESS_ID); 3005 // We don't want these events to be reported, so go set the ShouldReportStop here: 3006 m_process->GetThreadList().SetShouldReportStop (eVoteNo); 3007 3008 if (m_exec_count > 0) 3009 { 3010 --m_exec_count; 3011 RequestResume(); 3012 return eEventActionRetry; 3013 } 3014 else 3015 { 3016 m_process->CompleteAttach (); 3017 return eEventActionSuccess; 3018 } 3019 } 3020 break; 3021 3022 default: 3023 case eStateExited: 3024 case eStateInvalid: 3025 break; 3026 } 3027 3028 m_exit_string.assign ("No valid Process"); 3029 return eEventActionExit; 3030 } 3031 3032 Process::NextEventAction::EventActionResult 3033 Process::AttachCompletionHandler::HandleBeingInterrupted() 3034 { 3035 return eEventActionSuccess; 3036 } 3037 3038 const char * 3039 Process::AttachCompletionHandler::GetExitString () 3040 { 3041 return m_exit_string.c_str(); 3042 } 3043 3044 Error 3045 Process::Attach (ProcessAttachInfo &attach_info) 3046 { 3047 m_abi_sp.reset(); 3048 m_process_input_reader.reset(); 3049 m_dyld_ap.reset(); 3050 m_os_ap.reset(); 3051 3052 lldb::pid_t attach_pid = attach_info.GetProcessID(); 3053 Error error; 3054 if (attach_pid == LLDB_INVALID_PROCESS_ID) 3055 { 3056 char process_name[PATH_MAX]; 3057 3058 if (attach_info.GetExecutableFile().GetPath (process_name, sizeof(process_name))) 3059 { 3060 const bool wait_for_launch = attach_info.GetWaitForLaunch(); 3061 3062 if (wait_for_launch) 3063 { 3064 error = WillAttachToProcessWithName(process_name, wait_for_launch); 3065 if (error.Success()) 3066 { 3067 if (m_public_run_lock.WriteTryLock()) 3068 { 3069 m_should_detach = true; 3070 const bool restarted = false; 3071 SetPublicState (eStateAttaching, restarted); 3072 // Now attach using these arguments. 3073 error = DoAttachToProcessWithName (process_name, wait_for_launch, attach_info); 3074 } 3075 else 3076 { 3077 // This shouldn't happen 3078 error.SetErrorString("failed to acquire process run lock"); 3079 } 3080 3081 if (error.Fail()) 3082 { 3083 if (GetID() != LLDB_INVALID_PROCESS_ID) 3084 { 3085 SetID (LLDB_INVALID_PROCESS_ID); 3086 if (error.AsCString() == NULL) 3087 error.SetErrorString("attach failed"); 3088 3089 SetExitStatus(-1, error.AsCString()); 3090 } 3091 } 3092 else 3093 { 3094 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3095 StartPrivateStateThread(); 3096 } 3097 return error; 3098 } 3099 } 3100 else 3101 { 3102 ProcessInstanceInfoList process_infos; 3103 PlatformSP platform_sp (m_target.GetPlatform ()); 3104 3105 if (platform_sp) 3106 { 3107 ProcessInstanceInfoMatch match_info; 3108 match_info.GetProcessInfo() = attach_info; 3109 match_info.SetNameMatchType (eNameMatchEquals); 3110 platform_sp->FindProcesses (match_info, process_infos); 3111 const uint32_t num_matches = process_infos.GetSize(); 3112 if (num_matches == 1) 3113 { 3114 attach_pid = process_infos.GetProcessIDAtIndex(0); 3115 // Fall through and attach using the above process ID 3116 } 3117 else 3118 { 3119 match_info.GetProcessInfo().GetExecutableFile().GetPath (process_name, sizeof(process_name)); 3120 if (num_matches > 1) 3121 error.SetErrorStringWithFormat ("more than one process named %s", process_name); 3122 else 3123 error.SetErrorStringWithFormat ("could not find a process named %s", process_name); 3124 } 3125 } 3126 else 3127 { 3128 error.SetErrorString ("invalid platform, can't find processes by name"); 3129 return error; 3130 } 3131 } 3132 } 3133 else 3134 { 3135 error.SetErrorString ("invalid process name"); 3136 } 3137 } 3138 3139 if (attach_pid != LLDB_INVALID_PROCESS_ID) 3140 { 3141 error = WillAttachToProcessWithID(attach_pid); 3142 if (error.Success()) 3143 { 3144 3145 if (m_public_run_lock.WriteTryLock()) 3146 { 3147 // Now attach using these arguments. 3148 m_should_detach = true; 3149 const bool restarted = false; 3150 SetPublicState (eStateAttaching, restarted); 3151 error = DoAttachToProcessWithID (attach_pid, attach_info); 3152 } 3153 else 3154 { 3155 // This shouldn't happen 3156 error.SetErrorString("failed to acquire process run lock"); 3157 } 3158 3159 if (error.Success()) 3160 { 3161 3162 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3163 StartPrivateStateThread(); 3164 } 3165 else 3166 { 3167 if (GetID() != LLDB_INVALID_PROCESS_ID) 3168 { 3169 SetID (LLDB_INVALID_PROCESS_ID); 3170 const char *error_string = error.AsCString(); 3171 if (error_string == NULL) 3172 error_string = "attach failed"; 3173 3174 SetExitStatus(-1, error_string); 3175 } 3176 } 3177 } 3178 } 3179 return error; 3180 } 3181 3182 void 3183 Process::CompleteAttach () 3184 { 3185 // Let the process subclass figure out at much as it can about the process 3186 // before we go looking for a dynamic loader plug-in. 3187 DidAttach(); 3188 3189 // We just attached. If we have a platform, ask it for the process architecture, and if it isn't 3190 // the same as the one we've already set, switch architectures. 3191 PlatformSP platform_sp (m_target.GetPlatform ()); 3192 assert (platform_sp.get()); 3193 if (platform_sp) 3194 { 3195 const ArchSpec &target_arch = m_target.GetArchitecture(); 3196 if (target_arch.IsValid() && !platform_sp->IsCompatibleArchitecture (target_arch, false, NULL)) 3197 { 3198 ArchSpec platform_arch; 3199 platform_sp = platform_sp->GetPlatformForArchitecture (target_arch, &platform_arch); 3200 if (platform_sp) 3201 { 3202 m_target.SetPlatform (platform_sp); 3203 m_target.SetArchitecture(platform_arch); 3204 } 3205 } 3206 else 3207 { 3208 ProcessInstanceInfo process_info; 3209 platform_sp->GetProcessInfo (GetID(), process_info); 3210 const ArchSpec &process_arch = process_info.GetArchitecture(); 3211 if (process_arch.IsValid() && !m_target.GetArchitecture().IsExactMatch(process_arch)) 3212 m_target.SetArchitecture (process_arch); 3213 } 3214 } 3215 3216 // We have completed the attach, now it is time to find the dynamic loader 3217 // plug-in 3218 DynamicLoader *dyld = GetDynamicLoader (); 3219 if (dyld) 3220 dyld->DidAttach(); 3221 3222 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3223 // Figure out which one is the executable, and set that in our target: 3224 const ModuleList &target_modules = m_target.GetImages(); 3225 Mutex::Locker modules_locker(target_modules.GetMutex()); 3226 size_t num_modules = target_modules.GetSize(); 3227 ModuleSP new_executable_module_sp; 3228 3229 for (int i = 0; i < num_modules; i++) 3230 { 3231 ModuleSP module_sp (target_modules.GetModuleAtIndexUnlocked (i)); 3232 if (module_sp && module_sp->IsExecutable()) 3233 { 3234 if (m_target.GetExecutableModulePointer() != module_sp.get()) 3235 new_executable_module_sp = module_sp; 3236 break; 3237 } 3238 } 3239 if (new_executable_module_sp) 3240 m_target.SetExecutableModule (new_executable_module_sp, false); 3241 } 3242 3243 Error 3244 Process::ConnectRemote (Stream *strm, const char *remote_url) 3245 { 3246 m_abi_sp.reset(); 3247 m_process_input_reader.reset(); 3248 3249 // Find the process and its architecture. Make sure it matches the architecture 3250 // of the current Target, and if not adjust it. 3251 3252 Error error (DoConnectRemote (strm, remote_url)); 3253 if (error.Success()) 3254 { 3255 if (GetID() != LLDB_INVALID_PROCESS_ID) 3256 { 3257 EventSP event_sp; 3258 StateType state = WaitForProcessStopPrivate(NULL, event_sp); 3259 3260 if (state == eStateStopped || state == eStateCrashed) 3261 { 3262 // If we attached and actually have a process on the other end, then 3263 // this ended up being the equivalent of an attach. 3264 CompleteAttach (); 3265 3266 // This delays passing the stopped event to listeners till 3267 // CompleteAttach gets a chance to complete... 3268 HandlePrivateEvent (event_sp); 3269 3270 } 3271 } 3272 3273 if (PrivateStateThreadIsValid ()) 3274 ResumePrivateStateThread (); 3275 else 3276 StartPrivateStateThread (); 3277 } 3278 return error; 3279 } 3280 3281 3282 Error 3283 Process::PrivateResume () 3284 { 3285 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_STEP)); 3286 if (log) 3287 log->Printf("Process::PrivateResume() m_stop_id = %u, public state: %s private state: %s", 3288 m_mod_id.GetStopID(), 3289 StateAsCString(m_public_state.GetValue()), 3290 StateAsCString(m_private_state.GetValue())); 3291 3292 Error error (WillResume()); 3293 // Tell the process it is about to resume before the thread list 3294 if (error.Success()) 3295 { 3296 // Now let the thread list know we are about to resume so it 3297 // can let all of our threads know that they are about to be 3298 // resumed. Threads will each be called with 3299 // Thread::WillResume(StateType) where StateType contains the state 3300 // that they are supposed to have when the process is resumed 3301 // (suspended/running/stepping). Threads should also check 3302 // their resume signal in lldb::Thread::GetResumeSignal() 3303 // to see if they are supposed to start back up with a signal. 3304 if (m_thread_list.WillResume()) 3305 { 3306 // Last thing, do the PreResumeActions. 3307 if (!RunPreResumeActions()) 3308 { 3309 error.SetErrorStringWithFormat ("Process::PrivateResume PreResumeActions failed, not resuming."); 3310 } 3311 else 3312 { 3313 m_mod_id.BumpResumeID(); 3314 error = DoResume(); 3315 if (error.Success()) 3316 { 3317 DidResume(); 3318 m_thread_list.DidResume(); 3319 if (log) 3320 log->Printf ("Process thinks the process has resumed."); 3321 } 3322 } 3323 } 3324 else 3325 { 3326 // Somebody wanted to run without running. So generate a continue & a stopped event, 3327 // and let the world handle them. 3328 if (log) 3329 log->Printf ("Process::PrivateResume() asked to simulate a start & stop."); 3330 3331 SetPrivateState(eStateRunning); 3332 SetPrivateState(eStateStopped); 3333 } 3334 } 3335 else if (log) 3336 log->Printf ("Process::PrivateResume() got an error \"%s\".", error.AsCString("<unknown error>")); 3337 return error; 3338 } 3339 3340 Error 3341 Process::Halt (bool clear_thread_plans) 3342 { 3343 // Don't clear the m_clear_thread_plans_on_stop, only set it to true if 3344 // in case it was already set and some thread plan logic calls halt on its 3345 // own. 3346 m_clear_thread_plans_on_stop |= clear_thread_plans; 3347 3348 // First make sure we aren't in the middle of handling an event, or we might restart. This is pretty weak, since 3349 // we could just straightaway get another event. It just narrows the window... 3350 m_currently_handling_event.WaitForValueEqualTo(false); 3351 3352 3353 // Pause our private state thread so we can ensure no one else eats 3354 // the stop event out from under us. 3355 Listener halt_listener ("lldb.process.halt_listener"); 3356 HijackPrivateProcessEvents(&halt_listener); 3357 3358 EventSP event_sp; 3359 Error error (WillHalt()); 3360 3361 if (error.Success()) 3362 { 3363 3364 bool caused_stop = false; 3365 3366 // Ask the process subclass to actually halt our process 3367 error = DoHalt(caused_stop); 3368 if (error.Success()) 3369 { 3370 if (m_public_state.GetValue() == eStateAttaching) 3371 { 3372 SetExitStatus(SIGKILL, "Cancelled async attach."); 3373 Destroy (); 3374 } 3375 else 3376 { 3377 // If "caused_stop" is true, then DoHalt stopped the process. If 3378 // "caused_stop" is false, the process was already stopped. 3379 // If the DoHalt caused the process to stop, then we want to catch 3380 // this event and set the interrupted bool to true before we pass 3381 // this along so clients know that the process was interrupted by 3382 // a halt command. 3383 if (caused_stop) 3384 { 3385 // Wait for 1 second for the process to stop. 3386 TimeValue timeout_time; 3387 timeout_time = TimeValue::Now(); 3388 timeout_time.OffsetWithSeconds(1); 3389 bool got_event = halt_listener.WaitForEvent (&timeout_time, event_sp); 3390 StateType state = ProcessEventData::GetStateFromEvent(event_sp.get()); 3391 3392 if (!got_event || state == eStateInvalid) 3393 { 3394 // We timeout out and didn't get a stop event... 3395 error.SetErrorStringWithFormat ("Halt timed out. State = %s", StateAsCString(GetState())); 3396 } 3397 else 3398 { 3399 if (StateIsStoppedState (state, false)) 3400 { 3401 // We caused the process to interrupt itself, so mark this 3402 // as such in the stop event so clients can tell an interrupted 3403 // process from a natural stop 3404 ProcessEventData::SetInterruptedInEvent (event_sp.get(), true); 3405 } 3406 else 3407 { 3408 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3409 if (log) 3410 log->Printf("Process::Halt() failed to stop, state is: %s", StateAsCString(state)); 3411 error.SetErrorString ("Did not get stopped event after halt."); 3412 } 3413 } 3414 } 3415 DidHalt(); 3416 } 3417 } 3418 } 3419 // Resume our private state thread before we post the event (if any) 3420 RestorePrivateProcessEvents(); 3421 3422 // Post any event we might have consumed. If all goes well, we will have 3423 // stopped the process, intercepted the event and set the interrupted 3424 // bool in the event. Post it to the private event queue and that will end up 3425 // correctly setting the state. 3426 if (event_sp) 3427 m_private_state_broadcaster.BroadcastEvent(event_sp); 3428 3429 return error; 3430 } 3431 3432 Error 3433 Process::HaltForDestroyOrDetach(lldb::EventSP &exit_event_sp) 3434 { 3435 Error error; 3436 if (m_public_state.GetValue() == eStateRunning) 3437 { 3438 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3439 if (log) 3440 log->Printf("Process::Destroy() About to halt."); 3441 error = Halt(); 3442 if (error.Success()) 3443 { 3444 // Consume the halt event. 3445 TimeValue timeout (TimeValue::Now()); 3446 timeout.OffsetWithSeconds(1); 3447 StateType state = WaitForProcessToStop (&timeout, &exit_event_sp); 3448 3449 // If the process exited while we were waiting for it to stop, put the exited event into 3450 // the shared pointer passed in and return. Our caller doesn't need to do anything else, since 3451 // they don't have a process anymore... 3452 3453 if (state == eStateExited || m_private_state.GetValue() == eStateExited) 3454 { 3455 if (log) 3456 log->Printf("Process::HaltForDestroyOrDetach() Process exited while waiting to Halt."); 3457 return error; 3458 } 3459 else 3460 exit_event_sp.reset(); // It is ok to consume any non-exit stop events 3461 3462 if (state != eStateStopped) 3463 { 3464 if (log) 3465 log->Printf("Process::HaltForDestroyOrDetach() Halt failed to stop, state is: %s", StateAsCString(state)); 3466 // If we really couldn't stop the process then we should just error out here, but if the 3467 // lower levels just bobbled sending the event and we really are stopped, then continue on. 3468 StateType private_state = m_private_state.GetValue(); 3469 if (private_state != eStateStopped) 3470 { 3471 return error; 3472 } 3473 } 3474 } 3475 else 3476 { 3477 if (log) 3478 log->Printf("Process::HaltForDestroyOrDetach() Halt got error: %s", error.AsCString()); 3479 } 3480 } 3481 return error; 3482 } 3483 3484 Error 3485 Process::Detach (bool keep_stopped) 3486 { 3487 EventSP exit_event_sp; 3488 Error error; 3489 m_destroy_in_process = true; 3490 3491 error = WillDetach(); 3492 3493 if (error.Success()) 3494 { 3495 if (DetachRequiresHalt()) 3496 { 3497 error = HaltForDestroyOrDetach (exit_event_sp); 3498 if (!error.Success()) 3499 { 3500 m_destroy_in_process = false; 3501 return error; 3502 } 3503 else if (exit_event_sp) 3504 { 3505 // We shouldn't need to do anything else here. There's no process left to detach from... 3506 StopPrivateStateThread(); 3507 m_destroy_in_process = false; 3508 return error; 3509 } 3510 } 3511 3512 error = DoDetach(keep_stopped); 3513 if (error.Success()) 3514 { 3515 DidDetach(); 3516 StopPrivateStateThread(); 3517 } 3518 else 3519 { 3520 return error; 3521 } 3522 } 3523 m_destroy_in_process = false; 3524 3525 // If we exited when we were waiting for a process to stop, then 3526 // forward the event here so we don't lose the event 3527 if (exit_event_sp) 3528 { 3529 // Directly broadcast our exited event because we shut down our 3530 // private state thread above 3531 BroadcastEvent(exit_event_sp); 3532 } 3533 3534 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 3535 // the last events through the event system, in which case we might strand the write lock. Unlock 3536 // it here so when we do to tear down the process we don't get an error destroying the lock. 3537 3538 m_public_run_lock.WriteUnlock(); 3539 return error; 3540 } 3541 3542 Error 3543 Process::Destroy () 3544 { 3545 3546 // Tell ourselves we are in the process of destroying the process, so that we don't do any unnecessary work 3547 // that might hinder the destruction. Remember to set this back to false when we are done. That way if the attempt 3548 // failed and the process stays around for some reason it won't be in a confused state. 3549 3550 m_destroy_in_process = true; 3551 3552 Error error (WillDestroy()); 3553 if (error.Success()) 3554 { 3555 EventSP exit_event_sp; 3556 if (DestroyRequiresHalt()) 3557 { 3558 error = HaltForDestroyOrDetach(exit_event_sp); 3559 } 3560 3561 if (m_public_state.GetValue() != eStateRunning) 3562 { 3563 // Ditch all thread plans, and remove all our breakpoints: in case we have to restart the target to 3564 // kill it, we don't want it hitting a breakpoint... 3565 // Only do this if we've stopped, however, since if we didn't manage to halt it above, then 3566 // we're not going to have much luck doing this now. 3567 m_thread_list.DiscardThreadPlans(); 3568 DisableAllBreakpointSites(); 3569 } 3570 3571 error = DoDestroy(); 3572 if (error.Success()) 3573 { 3574 DidDestroy(); 3575 StopPrivateStateThread(); 3576 } 3577 m_stdio_communication.StopReadThread(); 3578 m_stdio_communication.Disconnect(); 3579 if (m_process_input_reader && m_process_input_reader->IsActive()) 3580 m_target.GetDebugger().PopInputReader (m_process_input_reader); 3581 if (m_process_input_reader) 3582 m_process_input_reader.reset(); 3583 3584 // If we exited when we were waiting for a process to stop, then 3585 // forward the event here so we don't lose the event 3586 if (exit_event_sp) 3587 { 3588 // Directly broadcast our exited event because we shut down our 3589 // private state thread above 3590 BroadcastEvent(exit_event_sp); 3591 } 3592 3593 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 3594 // the last events through the event system, in which case we might strand the write lock. Unlock 3595 // it here so when we do to tear down the process we don't get an error destroying the lock. 3596 m_public_run_lock.WriteUnlock(); 3597 } 3598 3599 m_destroy_in_process = false; 3600 3601 return error; 3602 } 3603 3604 Error 3605 Process::Signal (int signal) 3606 { 3607 Error error (WillSignal()); 3608 if (error.Success()) 3609 { 3610 error = DoSignal(signal); 3611 if (error.Success()) 3612 DidSignal(); 3613 } 3614 return error; 3615 } 3616 3617 lldb::ByteOrder 3618 Process::GetByteOrder () const 3619 { 3620 return m_target.GetArchitecture().GetByteOrder(); 3621 } 3622 3623 uint32_t 3624 Process::GetAddressByteSize () const 3625 { 3626 return m_target.GetArchitecture().GetAddressByteSize(); 3627 } 3628 3629 3630 bool 3631 Process::ShouldBroadcastEvent (Event *event_ptr) 3632 { 3633 const StateType state = Process::ProcessEventData::GetStateFromEvent (event_ptr); 3634 bool return_value = true; 3635 Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_EVENTS | LIBLLDB_LOG_PROCESS)); 3636 3637 switch (state) 3638 { 3639 case eStateConnected: 3640 case eStateAttaching: 3641 case eStateLaunching: 3642 case eStateDetached: 3643 case eStateExited: 3644 case eStateUnloaded: 3645 // These events indicate changes in the state of the debugging session, always report them. 3646 return_value = true; 3647 break; 3648 case eStateInvalid: 3649 // We stopped for no apparent reason, don't report it. 3650 return_value = false; 3651 break; 3652 case eStateRunning: 3653 case eStateStepping: 3654 // If we've started the target running, we handle the cases where we 3655 // are already running and where there is a transition from stopped to 3656 // running differently. 3657 // running -> running: Automatically suppress extra running events 3658 // stopped -> running: Report except when there is one or more no votes 3659 // and no yes votes. 3660 SynchronouslyNotifyStateChanged (state); 3661 switch (m_last_broadcast_state) 3662 { 3663 case eStateRunning: 3664 case eStateStepping: 3665 // We always suppress multiple runnings with no PUBLIC stop in between. 3666 return_value = false; 3667 break; 3668 default: 3669 // TODO: make this work correctly. For now always report 3670 // run if we aren't running so we don't miss any runnning 3671 // events. If I run the lldb/test/thread/a.out file and 3672 // break at main.cpp:58, run and hit the breakpoints on 3673 // multiple threads, then somehow during the stepping over 3674 // of all breakpoints no run gets reported. 3675 3676 // This is a transition from stop to run. 3677 switch (m_thread_list.ShouldReportRun (event_ptr)) 3678 { 3679 case eVoteYes: 3680 case eVoteNoOpinion: 3681 return_value = true; 3682 break; 3683 case eVoteNo: 3684 return_value = false; 3685 break; 3686 } 3687 break; 3688 } 3689 break; 3690 case eStateStopped: 3691 case eStateCrashed: 3692 case eStateSuspended: 3693 { 3694 // We've stopped. First see if we're going to restart the target. 3695 // If we are going to stop, then we always broadcast the event. 3696 // If we aren't going to stop, let the thread plans decide if we're going to report this event. 3697 // If no thread has an opinion, we don't report it. 3698 3699 RefreshStateAfterStop (); 3700 if (ProcessEventData::GetInterruptedFromEvent (event_ptr)) 3701 { 3702 if (log) 3703 log->Printf ("Process::ShouldBroadcastEvent (%p) stopped due to an interrupt, state: %s", 3704 event_ptr, 3705 StateAsCString(state)); 3706 return_value = true; 3707 } 3708 else 3709 { 3710 bool was_restarted = ProcessEventData::GetRestartedFromEvent (event_ptr); 3711 bool should_resume = false; 3712 3713 // It makes no sense to ask "ShouldStop" if we've already been restarted... 3714 // Asking the thread list is also not likely to go well, since we are running again. 3715 // So in that case just report the event. 3716 3717 if (!was_restarted) 3718 should_resume = m_thread_list.ShouldStop (event_ptr) == false; 3719 3720 if (was_restarted || should_resume || m_resume_requested) 3721 { 3722 Vote stop_vote = m_thread_list.ShouldReportStop (event_ptr); 3723 if (log) 3724 log->Printf ("Process::ShouldBroadcastEvent: should_stop: %i state: %s was_restarted: %i stop_vote: %d.", 3725 should_resume, 3726 StateAsCString(state), 3727 was_restarted, 3728 stop_vote); 3729 3730 switch (stop_vote) 3731 { 3732 case eVoteYes: 3733 return_value = true; 3734 break; 3735 case eVoteNoOpinion: 3736 case eVoteNo: 3737 return_value = false; 3738 break; 3739 } 3740 3741 if (!was_restarted) 3742 { 3743 if (log) 3744 log->Printf ("Process::ShouldBroadcastEvent (%p) Restarting process from state: %s", event_ptr, StateAsCString(state)); 3745 ProcessEventData::SetRestartedInEvent(event_ptr, true); 3746 PrivateResume (); 3747 } 3748 3749 } 3750 else 3751 { 3752 return_value = true; 3753 SynchronouslyNotifyStateChanged (state); 3754 } 3755 } 3756 } 3757 break; 3758 } 3759 3760 // We do some coalescing of events (for instance two consecutive running events get coalesced.) 3761 // But we only coalesce against events we actually broadcast. So we use m_last_broadcast_state 3762 // to track that. NB - you can't use "m_public_state.GetValue()" for that purpose, as was originally done, 3763 // because the PublicState reflects the last event pulled off the queue, and there may be several 3764 // events stacked up on the queue unserviced. So the PublicState may not reflect the last broadcasted event 3765 // yet. m_last_broadcast_state gets updated here. 3766 3767 if (return_value) 3768 m_last_broadcast_state = state; 3769 3770 if (log) 3771 log->Printf ("Process::ShouldBroadcastEvent (%p) => new state: %s, last broadcast state: %s - %s", 3772 event_ptr, 3773 StateAsCString(state), 3774 StateAsCString(m_last_broadcast_state), 3775 return_value ? "YES" : "NO"); 3776 return return_value; 3777 } 3778 3779 3780 bool 3781 Process::StartPrivateStateThread (bool force) 3782 { 3783 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EVENTS)); 3784 3785 bool already_running = PrivateStateThreadIsValid (); 3786 if (log) 3787 log->Printf ("Process::%s()%s ", __FUNCTION__, already_running ? " already running" : " starting private state thread"); 3788 3789 if (!force && already_running) 3790 return true; 3791 3792 // Create a thread that watches our internal state and controls which 3793 // events make it to clients (into the DCProcess event queue). 3794 char thread_name[1024]; 3795 if (already_running) 3796 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state-override(pid=%" PRIu64 ")>", GetID()); 3797 else 3798 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state(pid=%" PRIu64 ")>", GetID()); 3799 3800 // Create the private state thread, and start it running. 3801 m_private_state_thread = Host::ThreadCreate (thread_name, Process::PrivateStateThread, this, NULL); 3802 bool success = IS_VALID_LLDB_HOST_THREAD(m_private_state_thread); 3803 if (success) 3804 { 3805 ResumePrivateStateThread(); 3806 return true; 3807 } 3808 else 3809 return false; 3810 } 3811 3812 void 3813 Process::PausePrivateStateThread () 3814 { 3815 ControlPrivateStateThread (eBroadcastInternalStateControlPause); 3816 } 3817 3818 void 3819 Process::ResumePrivateStateThread () 3820 { 3821 ControlPrivateStateThread (eBroadcastInternalStateControlResume); 3822 } 3823 3824 void 3825 Process::StopPrivateStateThread () 3826 { 3827 if (PrivateStateThreadIsValid ()) 3828 ControlPrivateStateThread (eBroadcastInternalStateControlStop); 3829 else 3830 { 3831 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 3832 if (log) 3833 log->Printf ("Went to stop the private state thread, but it was already invalid."); 3834 } 3835 } 3836 3837 void 3838 Process::ControlPrivateStateThread (uint32_t signal) 3839 { 3840 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 3841 3842 assert (signal == eBroadcastInternalStateControlStop || 3843 signal == eBroadcastInternalStateControlPause || 3844 signal == eBroadcastInternalStateControlResume); 3845 3846 if (log) 3847 log->Printf ("Process::%s (signal = %d)", __FUNCTION__, signal); 3848 3849 // Signal the private state thread. First we should copy this is case the 3850 // thread starts exiting since the private state thread will NULL this out 3851 // when it exits 3852 const lldb::thread_t private_state_thread = m_private_state_thread; 3853 if (IS_VALID_LLDB_HOST_THREAD(private_state_thread)) 3854 { 3855 TimeValue timeout_time; 3856 bool timed_out; 3857 3858 m_private_state_control_broadcaster.BroadcastEvent (signal, NULL); 3859 3860 timeout_time = TimeValue::Now(); 3861 timeout_time.OffsetWithSeconds(2); 3862 if (log) 3863 log->Printf ("Sending control event of type: %d.", signal); 3864 m_private_state_control_wait.WaitForValueEqualTo (true, &timeout_time, &timed_out); 3865 m_private_state_control_wait.SetValue (false, eBroadcastNever); 3866 3867 if (signal == eBroadcastInternalStateControlStop) 3868 { 3869 if (timed_out) 3870 { 3871 Error error; 3872 Host::ThreadCancel (private_state_thread, &error); 3873 if (log) 3874 log->Printf ("Timed out responding to the control event, cancel got error: \"%s\".", error.AsCString()); 3875 } 3876 else 3877 { 3878 if (log) 3879 log->Printf ("The control event killed the private state thread without having to cancel."); 3880 } 3881 3882 thread_result_t result = NULL; 3883 Host::ThreadJoin (private_state_thread, &result, NULL); 3884 m_private_state_thread = LLDB_INVALID_HOST_THREAD; 3885 } 3886 } 3887 else 3888 { 3889 if (log) 3890 log->Printf ("Private state thread already dead, no need to signal it to stop."); 3891 } 3892 } 3893 3894 void 3895 Process::SendAsyncInterrupt () 3896 { 3897 if (PrivateStateThreadIsValid()) 3898 m_private_state_broadcaster.BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 3899 else 3900 BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 3901 } 3902 3903 void 3904 Process::HandlePrivateEvent (EventSP &event_sp) 3905 { 3906 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3907 m_resume_requested = false; 3908 3909 m_currently_handling_event.SetValue(true, eBroadcastNever); 3910 3911 const StateType new_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 3912 3913 // First check to see if anybody wants a shot at this event: 3914 if (m_next_event_action_ap.get() != NULL) 3915 { 3916 NextEventAction::EventActionResult action_result = m_next_event_action_ap->PerformAction(event_sp); 3917 if (log) 3918 log->Printf ("Ran next event action, result was %d.", action_result); 3919 3920 switch (action_result) 3921 { 3922 case NextEventAction::eEventActionSuccess: 3923 SetNextEventAction(NULL); 3924 break; 3925 3926 case NextEventAction::eEventActionRetry: 3927 break; 3928 3929 case NextEventAction::eEventActionExit: 3930 // Handle Exiting Here. If we already got an exited event, 3931 // we should just propagate it. Otherwise, swallow this event, 3932 // and set our state to exit so the next event will kill us. 3933 if (new_state != eStateExited) 3934 { 3935 // FIXME: should cons up an exited event, and discard this one. 3936 SetExitStatus(0, m_next_event_action_ap->GetExitString()); 3937 m_currently_handling_event.SetValue(false, eBroadcastAlways); 3938 SetNextEventAction(NULL); 3939 return; 3940 } 3941 SetNextEventAction(NULL); 3942 break; 3943 } 3944 } 3945 3946 // See if we should broadcast this state to external clients? 3947 const bool should_broadcast = ShouldBroadcastEvent (event_sp.get()); 3948 3949 if (should_broadcast) 3950 { 3951 if (log) 3952 { 3953 log->Printf ("Process::%s (pid = %" PRIu64 ") broadcasting new state %s (old state %s) to %s", 3954 __FUNCTION__, 3955 GetID(), 3956 StateAsCString(new_state), 3957 StateAsCString (GetState ()), 3958 IsHijackedForEvent(eBroadcastBitStateChanged) ? "hijacked" : "public"); 3959 } 3960 Process::ProcessEventData::SetUpdateStateOnRemoval(event_sp.get()); 3961 if (StateIsRunningState (new_state)) 3962 PushProcessInputReader (); 3963 else if (!Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 3964 PopProcessInputReader (); 3965 3966 BroadcastEvent (event_sp); 3967 } 3968 else 3969 { 3970 if (log) 3971 { 3972 log->Printf ("Process::%s (pid = %" PRIu64 ") suppressing state %s (old state %s): should_broadcast == false", 3973 __FUNCTION__, 3974 GetID(), 3975 StateAsCString(new_state), 3976 StateAsCString (GetState ())); 3977 } 3978 } 3979 m_currently_handling_event.SetValue(false, eBroadcastAlways); 3980 } 3981 3982 void * 3983 Process::PrivateStateThread (void *arg) 3984 { 3985 Process *proc = static_cast<Process*> (arg); 3986 void *result = proc->RunPrivateStateThread (); 3987 return result; 3988 } 3989 3990 void * 3991 Process::RunPrivateStateThread () 3992 { 3993 bool control_only = true; 3994 m_private_state_control_wait.SetValue (false, eBroadcastNever); 3995 3996 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3997 if (log) 3998 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, this, GetID()); 3999 4000 bool exit_now = false; 4001 while (!exit_now) 4002 { 4003 EventSP event_sp; 4004 WaitForEventsPrivate (NULL, event_sp, control_only); 4005 if (event_sp->BroadcasterIs(&m_private_state_control_broadcaster)) 4006 { 4007 if (log) 4008 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") got a control event: %d", __FUNCTION__, this, GetID(), event_sp->GetType()); 4009 4010 switch (event_sp->GetType()) 4011 { 4012 case eBroadcastInternalStateControlStop: 4013 exit_now = true; 4014 break; // doing any internal state managment below 4015 4016 case eBroadcastInternalStateControlPause: 4017 control_only = true; 4018 break; 4019 4020 case eBroadcastInternalStateControlResume: 4021 control_only = false; 4022 break; 4023 } 4024 4025 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4026 continue; 4027 } 4028 else if (event_sp->GetType() == eBroadcastBitInterrupt) 4029 { 4030 if (m_public_state.GetValue() == eStateAttaching) 4031 { 4032 if (log) 4033 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt while attaching - forwarding interrupt.", __FUNCTION__, this, GetID()); 4034 BroadcastEvent (eBroadcastBitInterrupt, NULL); 4035 } 4036 else 4037 { 4038 if (log) 4039 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt - Halting.", __FUNCTION__, this, GetID()); 4040 Halt(); 4041 } 4042 continue; 4043 } 4044 4045 const StateType internal_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4046 4047 if (internal_state != eStateInvalid) 4048 { 4049 if (m_clear_thread_plans_on_stop && 4050 StateIsStoppedState(internal_state, true)) 4051 { 4052 m_clear_thread_plans_on_stop = false; 4053 m_thread_list.DiscardThreadPlans(); 4054 } 4055 HandlePrivateEvent (event_sp); 4056 } 4057 4058 if (internal_state == eStateInvalid || 4059 internal_state == eStateExited || 4060 internal_state == eStateDetached ) 4061 { 4062 if (log) 4063 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") about to exit with internal state %s...", __FUNCTION__, this, GetID(), StateAsCString(internal_state)); 4064 4065 break; 4066 } 4067 } 4068 4069 // Verify log is still enabled before attempting to write to it... 4070 if (log) 4071 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, this, GetID()); 4072 4073 m_public_run_lock.WriteUnlock(); 4074 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4075 m_private_state_thread = LLDB_INVALID_HOST_THREAD; 4076 return NULL; 4077 } 4078 4079 //------------------------------------------------------------------ 4080 // Process Event Data 4081 //------------------------------------------------------------------ 4082 4083 Process::ProcessEventData::ProcessEventData () : 4084 EventData (), 4085 m_process_sp (), 4086 m_state (eStateInvalid), 4087 m_restarted (false), 4088 m_update_state (0), 4089 m_interrupted (false) 4090 { 4091 } 4092 4093 Process::ProcessEventData::ProcessEventData (const ProcessSP &process_sp, StateType state) : 4094 EventData (), 4095 m_process_sp (process_sp), 4096 m_state (state), 4097 m_restarted (false), 4098 m_update_state (0), 4099 m_interrupted (false) 4100 { 4101 } 4102 4103 Process::ProcessEventData::~ProcessEventData() 4104 { 4105 } 4106 4107 const ConstString & 4108 Process::ProcessEventData::GetFlavorString () 4109 { 4110 static ConstString g_flavor ("Process::ProcessEventData"); 4111 return g_flavor; 4112 } 4113 4114 const ConstString & 4115 Process::ProcessEventData::GetFlavor () const 4116 { 4117 return ProcessEventData::GetFlavorString (); 4118 } 4119 4120 void 4121 Process::ProcessEventData::DoOnRemoval (Event *event_ptr) 4122 { 4123 // This function gets called twice for each event, once when the event gets pulled 4124 // off of the private process event queue, and then any number of times, first when it gets pulled off of 4125 // the public event queue, then other times when we're pretending that this is where we stopped at the 4126 // end of expression evaluation. m_update_state is used to distinguish these 4127 // three cases; it is 0 when we're just pulling it off for private handling, 4128 // and > 1 for expression evaluation, and we don't want to do the breakpoint command handling then. 4129 if (m_update_state != 1) 4130 return; 4131 4132 m_process_sp->SetPublicState (m_state, Process::ProcessEventData::GetRestartedFromEvent(event_ptr)); 4133 4134 // If we're stopped and haven't restarted, then do the breakpoint commands here: 4135 if (m_state == eStateStopped && ! m_restarted) 4136 { 4137 ThreadList &curr_thread_list = m_process_sp->GetThreadList(); 4138 uint32_t num_threads = curr_thread_list.GetSize(); 4139 uint32_t idx; 4140 4141 // The actions might change one of the thread's stop_info's opinions about whether we should 4142 // stop the process, so we need to query that as we go. 4143 4144 // One other complication here, is that we try to catch any case where the target has run (except for expressions) 4145 // and immediately exit, but if we get that wrong (which is possible) then the thread list might have changed, and 4146 // that would cause our iteration here to crash. We could make a copy of the thread list, but we'd really like 4147 // to also know if it has changed at all, so we make up a vector of the thread ID's and check what we get back 4148 // against this list & bag out if anything differs. 4149 std::vector<uint32_t> thread_index_array(num_threads); 4150 for (idx = 0; idx < num_threads; ++idx) 4151 thread_index_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetIndexID(); 4152 4153 // Use this to track whether we should continue from here. We will only continue the target running if 4154 // no thread says we should stop. Of course if some thread's PerformAction actually sets the target running, 4155 // then it doesn't matter what the other threads say... 4156 4157 bool still_should_stop = false; 4158 4159 // Sometimes - for instance if we have a bug in the stub we are talking to, we stop but no thread has a 4160 // valid stop reason. In that case we should just stop, because we have no way of telling what the right 4161 // thing to do is, and it's better to let the user decide than continue behind their backs. 4162 4163 bool does_anybody_have_an_opinion = false; 4164 4165 for (idx = 0; idx < num_threads; ++idx) 4166 { 4167 curr_thread_list = m_process_sp->GetThreadList(); 4168 if (curr_thread_list.GetSize() != num_threads) 4169 { 4170 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4171 if (log) 4172 log->Printf("Number of threads changed from %u to %u while processing event.", num_threads, curr_thread_list.GetSize()); 4173 break; 4174 } 4175 4176 lldb::ThreadSP thread_sp = curr_thread_list.GetThreadAtIndex(idx); 4177 4178 if (thread_sp->GetIndexID() != thread_index_array[idx]) 4179 { 4180 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4181 if (log) 4182 log->Printf("The thread at position %u changed from %u to %u while processing event.", 4183 idx, 4184 thread_index_array[idx], 4185 thread_sp->GetIndexID()); 4186 break; 4187 } 4188 4189 StopInfoSP stop_info_sp = thread_sp->GetStopInfo (); 4190 if (stop_info_sp && stop_info_sp->IsValid()) 4191 { 4192 does_anybody_have_an_opinion = true; 4193 bool this_thread_wants_to_stop; 4194 if (stop_info_sp->GetOverrideShouldStop()) 4195 { 4196 this_thread_wants_to_stop = stop_info_sp->GetOverriddenShouldStopValue(); 4197 } 4198 else 4199 { 4200 stop_info_sp->PerformAction(event_ptr); 4201 // The stop action might restart the target. If it does, then we want to mark that in the 4202 // event so that whoever is receiving it will know to wait for the running event and reflect 4203 // that state appropriately. 4204 // We also need to stop processing actions, since they aren't expecting the target to be running. 4205 4206 // FIXME: we might have run. 4207 if (stop_info_sp->HasTargetRunSinceMe()) 4208 { 4209 SetRestarted (true); 4210 break; 4211 } 4212 4213 this_thread_wants_to_stop = stop_info_sp->ShouldStop(event_ptr); 4214 } 4215 4216 if (still_should_stop == false) 4217 still_should_stop = this_thread_wants_to_stop; 4218 } 4219 } 4220 4221 4222 if (!GetRestarted()) 4223 { 4224 if (!still_should_stop && does_anybody_have_an_opinion) 4225 { 4226 // We've been asked to continue, so do that here. 4227 SetRestarted(true); 4228 // Use the public resume method here, since this is just 4229 // extending a public resume. 4230 m_process_sp->PrivateResume(); 4231 } 4232 else 4233 { 4234 // If we didn't restart, run the Stop Hooks here: 4235 // They might also restart the target, so watch for that. 4236 m_process_sp->GetTarget().RunStopHooks(); 4237 if (m_process_sp->GetPrivateState() == eStateRunning) 4238 SetRestarted(true); 4239 } 4240 } 4241 } 4242 } 4243 4244 void 4245 Process::ProcessEventData::Dump (Stream *s) const 4246 { 4247 if (m_process_sp) 4248 s->Printf(" process = %p (pid = %" PRIu64 "), ", m_process_sp.get(), m_process_sp->GetID()); 4249 4250 s->Printf("state = %s", StateAsCString(GetState())); 4251 } 4252 4253 const Process::ProcessEventData * 4254 Process::ProcessEventData::GetEventDataFromEvent (const Event *event_ptr) 4255 { 4256 if (event_ptr) 4257 { 4258 const EventData *event_data = event_ptr->GetData(); 4259 if (event_data && event_data->GetFlavor() == ProcessEventData::GetFlavorString()) 4260 return static_cast <const ProcessEventData *> (event_ptr->GetData()); 4261 } 4262 return NULL; 4263 } 4264 4265 ProcessSP 4266 Process::ProcessEventData::GetProcessFromEvent (const Event *event_ptr) 4267 { 4268 ProcessSP process_sp; 4269 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4270 if (data) 4271 process_sp = data->GetProcessSP(); 4272 return process_sp; 4273 } 4274 4275 StateType 4276 Process::ProcessEventData::GetStateFromEvent (const Event *event_ptr) 4277 { 4278 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4279 if (data == NULL) 4280 return eStateInvalid; 4281 else 4282 return data->GetState(); 4283 } 4284 4285 bool 4286 Process::ProcessEventData::GetRestartedFromEvent (const Event *event_ptr) 4287 { 4288 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4289 if (data == NULL) 4290 return false; 4291 else 4292 return data->GetRestarted(); 4293 } 4294 4295 void 4296 Process::ProcessEventData::SetRestartedInEvent (Event *event_ptr, bool new_value) 4297 { 4298 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4299 if (data != NULL) 4300 data->SetRestarted(new_value); 4301 } 4302 4303 size_t 4304 Process::ProcessEventData::GetNumRestartedReasons(const Event *event_ptr) 4305 { 4306 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4307 if (data != NULL) 4308 return data->GetNumRestartedReasons(); 4309 else 4310 return 0; 4311 } 4312 4313 const char * 4314 Process::ProcessEventData::GetRestartedReasonAtIndex(const Event *event_ptr, size_t idx) 4315 { 4316 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4317 if (data != NULL) 4318 return data->GetRestartedReasonAtIndex(idx); 4319 else 4320 return NULL; 4321 } 4322 4323 void 4324 Process::ProcessEventData::AddRestartedReason (Event *event_ptr, const char *reason) 4325 { 4326 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4327 if (data != NULL) 4328 data->AddRestartedReason(reason); 4329 } 4330 4331 bool 4332 Process::ProcessEventData::GetInterruptedFromEvent (const Event *event_ptr) 4333 { 4334 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4335 if (data == NULL) 4336 return false; 4337 else 4338 return data->GetInterrupted (); 4339 } 4340 4341 void 4342 Process::ProcessEventData::SetInterruptedInEvent (Event *event_ptr, bool new_value) 4343 { 4344 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4345 if (data != NULL) 4346 data->SetInterrupted(new_value); 4347 } 4348 4349 bool 4350 Process::ProcessEventData::SetUpdateStateOnRemoval (Event *event_ptr) 4351 { 4352 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4353 if (data) 4354 { 4355 data->SetUpdateStateOnRemoval(); 4356 return true; 4357 } 4358 return false; 4359 } 4360 4361 lldb::TargetSP 4362 Process::CalculateTarget () 4363 { 4364 return m_target.shared_from_this(); 4365 } 4366 4367 void 4368 Process::CalculateExecutionContext (ExecutionContext &exe_ctx) 4369 { 4370 exe_ctx.SetTargetPtr (&m_target); 4371 exe_ctx.SetProcessPtr (this); 4372 exe_ctx.SetThreadPtr(NULL); 4373 exe_ctx.SetFramePtr (NULL); 4374 } 4375 4376 //uint32_t 4377 //Process::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 4378 //{ 4379 // return 0; 4380 //} 4381 // 4382 //ArchSpec 4383 //Process::GetArchSpecForExistingProcess (lldb::pid_t pid) 4384 //{ 4385 // return Host::GetArchSpecForExistingProcess (pid); 4386 //} 4387 // 4388 //ArchSpec 4389 //Process::GetArchSpecForExistingProcess (const char *process_name) 4390 //{ 4391 // return Host::GetArchSpecForExistingProcess (process_name); 4392 //} 4393 // 4394 void 4395 Process::AppendSTDOUT (const char * s, size_t len) 4396 { 4397 Mutex::Locker locker (m_stdio_communication_mutex); 4398 m_stdout_data.append (s, len); 4399 BroadcastEventIfUnique (eBroadcastBitSTDOUT, new ProcessEventData (shared_from_this(), GetState())); 4400 } 4401 4402 void 4403 Process::AppendSTDERR (const char * s, size_t len) 4404 { 4405 Mutex::Locker locker (m_stdio_communication_mutex); 4406 m_stderr_data.append (s, len); 4407 BroadcastEventIfUnique (eBroadcastBitSTDERR, new ProcessEventData (shared_from_this(), GetState())); 4408 } 4409 4410 void 4411 Process::BroadcastAsyncProfileData(const char *s, size_t len) 4412 { 4413 Mutex::Locker locker (m_profile_data_comm_mutex); 4414 m_profile_data.push_back(s); 4415 BroadcastEventIfUnique (eBroadcastBitProfileData, new ProcessEventData (shared_from_this(), GetState())); 4416 } 4417 4418 size_t 4419 Process::GetAsyncProfileData (char *buf, size_t buf_size, Error &error) 4420 { 4421 Mutex::Locker locker(m_profile_data_comm_mutex); 4422 if (m_profile_data.empty()) 4423 return 0; 4424 4425 size_t bytes_available = m_profile_data.front().size(); 4426 if (bytes_available > 0) 4427 { 4428 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4429 if (log) 4430 log->Printf ("Process::GetProfileData (buf = %p, size = %" PRIu64 ")", buf, (uint64_t)buf_size); 4431 if (bytes_available > buf_size) 4432 { 4433 memcpy(buf, m_profile_data.front().data(), buf_size); 4434 m_profile_data.front().erase(0, buf_size); 4435 bytes_available = buf_size; 4436 } 4437 else 4438 { 4439 memcpy(buf, m_profile_data.front().data(), bytes_available); 4440 m_profile_data.erase(m_profile_data.begin()); 4441 } 4442 } 4443 return bytes_available; 4444 } 4445 4446 4447 //------------------------------------------------------------------ 4448 // Process STDIO 4449 //------------------------------------------------------------------ 4450 4451 size_t 4452 Process::GetSTDOUT (char *buf, size_t buf_size, Error &error) 4453 { 4454 Mutex::Locker locker(m_stdio_communication_mutex); 4455 size_t bytes_available = m_stdout_data.size(); 4456 if (bytes_available > 0) 4457 { 4458 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4459 if (log) 4460 log->Printf ("Process::GetSTDOUT (buf = %p, size = %" PRIu64 ")", buf, (uint64_t)buf_size); 4461 if (bytes_available > buf_size) 4462 { 4463 memcpy(buf, m_stdout_data.c_str(), buf_size); 4464 m_stdout_data.erase(0, buf_size); 4465 bytes_available = buf_size; 4466 } 4467 else 4468 { 4469 memcpy(buf, m_stdout_data.c_str(), bytes_available); 4470 m_stdout_data.clear(); 4471 } 4472 } 4473 return bytes_available; 4474 } 4475 4476 4477 size_t 4478 Process::GetSTDERR (char *buf, size_t buf_size, Error &error) 4479 { 4480 Mutex::Locker locker(m_stdio_communication_mutex); 4481 size_t bytes_available = m_stderr_data.size(); 4482 if (bytes_available > 0) 4483 { 4484 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4485 if (log) 4486 log->Printf ("Process::GetSTDERR (buf = %p, size = %" PRIu64 ")", buf, (uint64_t)buf_size); 4487 if (bytes_available > buf_size) 4488 { 4489 memcpy(buf, m_stderr_data.c_str(), buf_size); 4490 m_stderr_data.erase(0, buf_size); 4491 bytes_available = buf_size; 4492 } 4493 else 4494 { 4495 memcpy(buf, m_stderr_data.c_str(), bytes_available); 4496 m_stderr_data.clear(); 4497 } 4498 } 4499 return bytes_available; 4500 } 4501 4502 void 4503 Process::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len) 4504 { 4505 Process *process = (Process *) baton; 4506 process->AppendSTDOUT (static_cast<const char *>(src), src_len); 4507 } 4508 4509 size_t 4510 Process::ProcessInputReaderCallback (void *baton, 4511 InputReader &reader, 4512 lldb::InputReaderAction notification, 4513 const char *bytes, 4514 size_t bytes_len) 4515 { 4516 Process *process = (Process *) baton; 4517 4518 switch (notification) 4519 { 4520 case eInputReaderActivate: 4521 break; 4522 4523 case eInputReaderDeactivate: 4524 break; 4525 4526 case eInputReaderReactivate: 4527 break; 4528 4529 case eInputReaderAsynchronousOutputWritten: 4530 break; 4531 4532 case eInputReaderGotToken: 4533 { 4534 Error error; 4535 process->PutSTDIN (bytes, bytes_len, error); 4536 } 4537 break; 4538 4539 case eInputReaderInterrupt: 4540 process->Halt (); 4541 break; 4542 4543 case eInputReaderEndOfFile: 4544 process->AppendSTDOUT ("^D", 2); 4545 break; 4546 4547 case eInputReaderDone: 4548 break; 4549 4550 } 4551 4552 return bytes_len; 4553 } 4554 4555 void 4556 Process::ResetProcessInputReader () 4557 { 4558 m_process_input_reader.reset(); 4559 } 4560 4561 void 4562 Process::SetSTDIOFileDescriptor (int file_descriptor) 4563 { 4564 // First set up the Read Thread for reading/handling process I/O 4565 4566 std::unique_ptr<ConnectionFileDescriptor> conn_ap (new ConnectionFileDescriptor (file_descriptor, true)); 4567 4568 if (conn_ap.get()) 4569 { 4570 m_stdio_communication.SetConnection (conn_ap.release()); 4571 if (m_stdio_communication.IsConnected()) 4572 { 4573 m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this); 4574 m_stdio_communication.StartReadThread(); 4575 4576 // Now read thread is set up, set up input reader. 4577 4578 if (!m_process_input_reader.get()) 4579 { 4580 m_process_input_reader.reset (new InputReader(m_target.GetDebugger())); 4581 Error err (m_process_input_reader->Initialize (Process::ProcessInputReaderCallback, 4582 this, 4583 eInputReaderGranularityByte, 4584 NULL, 4585 NULL, 4586 false)); 4587 4588 if (err.Fail()) 4589 m_process_input_reader.reset(); 4590 } 4591 } 4592 } 4593 } 4594 4595 void 4596 Process::PushProcessInputReader () 4597 { 4598 if (m_process_input_reader && !m_process_input_reader->IsActive()) 4599 m_target.GetDebugger().PushInputReader (m_process_input_reader); 4600 } 4601 4602 void 4603 Process::PopProcessInputReader () 4604 { 4605 if (m_process_input_reader && m_process_input_reader->IsActive()) 4606 m_target.GetDebugger().PopInputReader (m_process_input_reader); 4607 } 4608 4609 // The process needs to know about installed plug-ins 4610 void 4611 Process::SettingsInitialize () 4612 { 4613 // static std::vector<OptionEnumValueElement> g_plugins; 4614 // 4615 // int i=0; 4616 // const char *name; 4617 // OptionEnumValueElement option_enum; 4618 // while ((name = PluginManager::GetProcessPluginNameAtIndex (i)) != NULL) 4619 // { 4620 // if (name) 4621 // { 4622 // option_enum.value = i; 4623 // option_enum.string_value = name; 4624 // option_enum.usage = PluginManager::GetProcessPluginDescriptionAtIndex (i); 4625 // g_plugins.push_back (option_enum); 4626 // } 4627 // ++i; 4628 // } 4629 // option_enum.value = 0; 4630 // option_enum.string_value = NULL; 4631 // option_enum.usage = NULL; 4632 // g_plugins.push_back (option_enum); 4633 // 4634 // for (i=0; (name = SettingsController::instance_settings_table[i].var_name); ++i) 4635 // { 4636 // if (::strcmp (name, "plugin") == 0) 4637 // { 4638 // SettingsController::instance_settings_table[i].enum_values = &g_plugins[0]; 4639 // break; 4640 // } 4641 // } 4642 // 4643 Thread::SettingsInitialize (); 4644 } 4645 4646 void 4647 Process::SettingsTerminate () 4648 { 4649 Thread::SettingsTerminate (); 4650 } 4651 4652 ExecutionResults 4653 Process::RunThreadPlan (ExecutionContext &exe_ctx, 4654 lldb::ThreadPlanSP &thread_plan_sp, 4655 bool stop_others, 4656 bool run_others, 4657 bool unwind_on_error, 4658 bool ignore_breakpoints, 4659 uint32_t timeout_usec, 4660 Stream &errors) 4661 { 4662 ExecutionResults return_value = eExecutionSetupError; 4663 4664 if (thread_plan_sp.get() == NULL) 4665 { 4666 errors.Printf("RunThreadPlan called with empty thread plan."); 4667 return eExecutionSetupError; 4668 } 4669 4670 if (!thread_plan_sp->ValidatePlan(NULL)) 4671 { 4672 errors.Printf ("RunThreadPlan called with an invalid thread plan."); 4673 return eExecutionSetupError; 4674 } 4675 4676 if (exe_ctx.GetProcessPtr() != this) 4677 { 4678 errors.Printf("RunThreadPlan called on wrong process."); 4679 return eExecutionSetupError; 4680 } 4681 4682 Thread *thread = exe_ctx.GetThreadPtr(); 4683 if (thread == NULL) 4684 { 4685 errors.Printf("RunThreadPlan called with invalid thread."); 4686 return eExecutionSetupError; 4687 } 4688 4689 // We rely on the thread plan we are running returning "PlanCompleted" if when it successfully completes. 4690 // For that to be true the plan can't be private - since private plans suppress themselves in the 4691 // GetCompletedPlan call. 4692 4693 bool orig_plan_private = thread_plan_sp->GetPrivate(); 4694 thread_plan_sp->SetPrivate(false); 4695 4696 if (m_private_state.GetValue() != eStateStopped) 4697 { 4698 errors.Printf ("RunThreadPlan called while the private state was not stopped."); 4699 return eExecutionSetupError; 4700 } 4701 4702 // Save the thread & frame from the exe_ctx for restoration after we run 4703 const uint32_t thread_idx_id = thread->GetIndexID(); 4704 StackFrameSP selected_frame_sp = thread->GetSelectedFrame(); 4705 if (!selected_frame_sp) 4706 { 4707 thread->SetSelectedFrame(0); 4708 selected_frame_sp = thread->GetSelectedFrame(); 4709 if (!selected_frame_sp) 4710 { 4711 errors.Printf("RunThreadPlan called without a selected frame on thread %d", thread_idx_id); 4712 return eExecutionSetupError; 4713 } 4714 } 4715 4716 StackID ctx_frame_id = selected_frame_sp->GetStackID(); 4717 4718 // N.B. Running the target may unset the currently selected thread and frame. We don't want to do that either, 4719 // so we should arrange to reset them as well. 4720 4721 lldb::ThreadSP selected_thread_sp = GetThreadList().GetSelectedThread(); 4722 4723 uint32_t selected_tid; 4724 StackID selected_stack_id; 4725 if (selected_thread_sp) 4726 { 4727 selected_tid = selected_thread_sp->GetIndexID(); 4728 selected_stack_id = selected_thread_sp->GetSelectedFrame()->GetStackID(); 4729 } 4730 else 4731 { 4732 selected_tid = LLDB_INVALID_THREAD_ID; 4733 } 4734 4735 lldb::thread_t backup_private_state_thread = LLDB_INVALID_HOST_THREAD; 4736 lldb::StateType old_state; 4737 lldb::ThreadPlanSP stopper_base_plan_sp; 4738 4739 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4740 if (Host::GetCurrentThread() == m_private_state_thread) 4741 { 4742 // Yikes, we are running on the private state thread! So we can't wait for public events on this thread, since 4743 // we are the thread that is generating public events. 4744 // The simplest thing to do is to spin up a temporary thread to handle private state thread events while 4745 // we are fielding public events here. 4746 if (log) 4747 log->Printf ("Running thread plan on private state thread, spinning up another state thread to handle the events."); 4748 4749 4750 backup_private_state_thread = m_private_state_thread; 4751 4752 // One other bit of business: we want to run just this thread plan and anything it pushes, and then stop, 4753 // returning control here. 4754 // But in the normal course of things, the plan above us on the stack would be given a shot at the stop 4755 // event before deciding to stop, and we don't want that. So we insert a "stopper" base plan on the stack 4756 // before the plan we want to run. Since base plans always stop and return control to the user, that will 4757 // do just what we want. 4758 stopper_base_plan_sp.reset(new ThreadPlanBase (*thread)); 4759 thread->QueueThreadPlan (stopper_base_plan_sp, false); 4760 // Have to make sure our public state is stopped, since otherwise the reporting logic below doesn't work correctly. 4761 old_state = m_public_state.GetValue(); 4762 m_public_state.SetValueNoLock(eStateStopped); 4763 4764 // Now spin up the private state thread: 4765 StartPrivateStateThread(true); 4766 } 4767 4768 thread->QueueThreadPlan(thread_plan_sp, false); // This used to pass "true" does that make sense? 4769 4770 Listener listener("lldb.process.listener.run-thread-plan"); 4771 4772 lldb::EventSP event_to_broadcast_sp; 4773 4774 { 4775 // This process event hijacker Hijacks the Public events and its destructor makes sure that the process events get 4776 // restored on exit to the function. 4777 // 4778 // If the event needs to propagate beyond the hijacker (e.g., the process exits during execution), then the event 4779 // is put into event_to_broadcast_sp for rebroadcasting. 4780 4781 ProcessEventHijacker run_thread_plan_hijacker (*this, &listener); 4782 4783 if (log) 4784 { 4785 StreamString s; 4786 thread_plan_sp->GetDescription(&s, lldb::eDescriptionLevelVerbose); 4787 log->Printf ("Process::RunThreadPlan(): Resuming thread %u - 0x%4.4" PRIx64 " to run thread plan \"%s\".", 4788 thread->GetIndexID(), 4789 thread->GetID(), 4790 s.GetData()); 4791 } 4792 4793 bool got_event; 4794 lldb::EventSP event_sp; 4795 lldb::StateType stop_state = lldb::eStateInvalid; 4796 4797 TimeValue* timeout_ptr = NULL; 4798 TimeValue real_timeout; 4799 4800 bool before_first_timeout = true; // This is set to false the first time that we have to halt the target. 4801 bool do_resume = true; 4802 bool handle_running_event = true; 4803 const uint64_t default_one_thread_timeout_usec = 250000; 4804 4805 // This is just for accounting: 4806 uint32_t num_resumes = 0; 4807 4808 TimeValue one_thread_timeout = TimeValue::Now(); 4809 TimeValue final_timeout = one_thread_timeout; 4810 4811 if (run_others) 4812 { 4813 // If we are running all threads then we take half the time to run all threads, bounded by 4814 // .25 sec. 4815 if (timeout_usec == 0) 4816 one_thread_timeout.OffsetWithMicroSeconds(default_one_thread_timeout_usec); 4817 else 4818 { 4819 uint64_t computed_timeout = timeout_usec / 2; 4820 if (computed_timeout > default_one_thread_timeout_usec) 4821 computed_timeout = default_one_thread_timeout_usec; 4822 one_thread_timeout.OffsetWithMicroSeconds(computed_timeout); 4823 } 4824 final_timeout.OffsetWithMicroSeconds (timeout_usec); 4825 } 4826 else 4827 { 4828 if (timeout_usec != 0) 4829 final_timeout.OffsetWithMicroSeconds(timeout_usec); 4830 } 4831 4832 // This while loop must exit out the bottom, there's cleanup that we need to do when we are done. 4833 // So don't call return anywhere within it. 4834 4835 while (1) 4836 { 4837 // We usually want to resume the process if we get to the top of the loop. 4838 // The only exception is if we get two running events with no intervening 4839 // stop, which can happen, we will just wait for then next stop event. 4840 if (log) 4841 log->Printf ("Top of while loop: do_resume: %i handle_running_event: %i before_first_timeout: %i.", 4842 do_resume, 4843 handle_running_event, 4844 before_first_timeout); 4845 4846 if (do_resume || handle_running_event) 4847 { 4848 // Do the initial resume and wait for the running event before going further. 4849 4850 if (do_resume) 4851 { 4852 num_resumes++; 4853 Error resume_error = PrivateResume (); 4854 if (!resume_error.Success()) 4855 { 4856 errors.Printf("Error resuming inferior the %d time: \"%s\".\n", 4857 num_resumes, 4858 resume_error.AsCString()); 4859 return_value = eExecutionSetupError; 4860 break; 4861 } 4862 } 4863 4864 TimeValue resume_timeout = TimeValue::Now(); 4865 resume_timeout.OffsetWithMicroSeconds(500000); 4866 4867 got_event = listener.WaitForEvent(&resume_timeout, event_sp); 4868 if (!got_event) 4869 { 4870 if (log) 4871 log->Printf ("Process::RunThreadPlan(): didn't get any event after resume %d, exiting.", 4872 num_resumes); 4873 4874 errors.Printf("Didn't get any event after resume %d, exiting.", num_resumes); 4875 return_value = eExecutionSetupError; 4876 break; 4877 } 4878 4879 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4880 4881 if (stop_state != eStateRunning) 4882 { 4883 bool restarted = false; 4884 4885 if (stop_state == eStateStopped) 4886 { 4887 restarted = Process::ProcessEventData::GetRestartedFromEvent(event_sp.get()); 4888 if (log) 4889 log->Printf("Process::RunThreadPlan(): didn't get running event after " 4890 "resume %d, got %s instead (restarted: %i, do_resume: %i, handle_running_event: %i).", 4891 num_resumes, 4892 StateAsCString(stop_state), 4893 restarted, 4894 do_resume, 4895 handle_running_event); 4896 } 4897 4898 if (restarted) 4899 { 4900 // This is probably an overabundance of caution, I don't think I should ever get a stopped & restarted 4901 // event here. But if I do, the best thing is to Halt and then get out of here. 4902 Halt(); 4903 } 4904 4905 errors.Printf("Didn't get running event after initial resume, got %s instead.", 4906 StateAsCString(stop_state)); 4907 return_value = eExecutionSetupError; 4908 break; 4909 } 4910 4911 if (log) 4912 log->PutCString ("Process::RunThreadPlan(): resuming succeeded."); 4913 // We need to call the function synchronously, so spin waiting for it to return. 4914 // If we get interrupted while executing, we're going to lose our context, and 4915 // won't be able to gather the result at this point. 4916 // We set the timeout AFTER the resume, since the resume takes some time and we 4917 // don't want to charge that to the timeout. 4918 } 4919 else 4920 { 4921 if (log) 4922 log->PutCString ("Process::RunThreadPlan(): waiting for next event."); 4923 } 4924 4925 if (before_first_timeout) 4926 { 4927 if (run_others) 4928 timeout_ptr = &one_thread_timeout; 4929 else 4930 { 4931 if (timeout_usec == 0) 4932 timeout_ptr = NULL; 4933 else 4934 timeout_ptr = &final_timeout; 4935 } 4936 } 4937 else 4938 { 4939 if (timeout_usec == 0) 4940 timeout_ptr = NULL; 4941 else 4942 timeout_ptr = &final_timeout; 4943 } 4944 4945 do_resume = true; 4946 handle_running_event = true; 4947 4948 // Now wait for the process to stop again: 4949 event_sp.reset(); 4950 4951 if (log) 4952 { 4953 if (timeout_ptr) 4954 { 4955 log->Printf ("Process::RunThreadPlan(): about to wait - now is %" PRIu64 " - endpoint is %" PRIu64, 4956 TimeValue::Now().GetAsMicroSecondsSinceJan1_1970(), 4957 timeout_ptr->GetAsMicroSecondsSinceJan1_1970()); 4958 } 4959 else 4960 { 4961 log->Printf ("Process::RunThreadPlan(): about to wait forever."); 4962 } 4963 } 4964 4965 got_event = listener.WaitForEvent (timeout_ptr, event_sp); 4966 4967 if (got_event) 4968 { 4969 if (event_sp.get()) 4970 { 4971 bool keep_going = false; 4972 if (event_sp->GetType() == eBroadcastBitInterrupt) 4973 { 4974 Halt(); 4975 return_value = eExecutionInterrupted; 4976 errors.Printf ("Execution halted by user interrupt."); 4977 if (log) 4978 log->Printf ("Process::RunThreadPlan(): Got interrupted by eBroadcastBitInterrupted, exiting."); 4979 break; 4980 } 4981 else 4982 { 4983 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4984 if (log) 4985 log->Printf("Process::RunThreadPlan(): in while loop, got event: %s.", StateAsCString(stop_state)); 4986 4987 switch (stop_state) 4988 { 4989 case lldb::eStateStopped: 4990 { 4991 // We stopped, figure out what we are going to do now. 4992 ThreadSP thread_sp = GetThreadList().FindThreadByIndexID (thread_idx_id); 4993 if (!thread_sp) 4994 { 4995 // Ooh, our thread has vanished. Unlikely that this was successful execution... 4996 if (log) 4997 log->Printf ("Process::RunThreadPlan(): execution completed but our thread (index-id=%u) has vanished.", thread_idx_id); 4998 return_value = eExecutionInterrupted; 4999 } 5000 else 5001 { 5002 // If we were restarted, we just need to go back up to fetch another event. 5003 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5004 { 5005 if (log) 5006 { 5007 log->Printf ("Process::RunThreadPlan(): Got a stop and restart, so we'll continue waiting."); 5008 } 5009 keep_going = true; 5010 do_resume = false; 5011 handle_running_event = true; 5012 5013 } 5014 else 5015 { 5016 5017 StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 5018 StopReason stop_reason = eStopReasonInvalid; 5019 if (stop_info_sp) 5020 stop_reason = stop_info_sp->GetStopReason(); 5021 5022 5023 // FIXME: We only check if the stop reason is plan complete, should we make sure that 5024 // it is OUR plan that is complete? 5025 if (stop_reason == eStopReasonPlanComplete) 5026 { 5027 if (log) 5028 log->PutCString ("Process::RunThreadPlan(): execution completed successfully."); 5029 // Now mark this plan as private so it doesn't get reported as the stop reason 5030 // after this point. 5031 if (thread_plan_sp) 5032 thread_plan_sp->SetPrivate (orig_plan_private); 5033 return_value = eExecutionCompleted; 5034 } 5035 else 5036 { 5037 // Something restarted the target, so just wait for it to stop for real. 5038 if (stop_reason == eStopReasonBreakpoint) 5039 { 5040 if (log) 5041 log->Printf ("Process::RunThreadPlan() stopped for breakpoint: %s.", stop_info_sp->GetDescription()); 5042 return_value = eExecutionHitBreakpoint; 5043 } 5044 else 5045 { 5046 if (log) 5047 log->PutCString ("Process::RunThreadPlan(): thread plan didn't successfully complete."); 5048 return_value = eExecutionInterrupted; 5049 } 5050 } 5051 } 5052 } 5053 } 5054 break; 5055 5056 case lldb::eStateRunning: 5057 // This shouldn't really happen, but sometimes we do get two running events without an 5058 // intervening stop, and in that case we should just go back to waiting for the stop. 5059 do_resume = false; 5060 keep_going = true; 5061 handle_running_event = false; 5062 break; 5063 5064 default: 5065 if (log) 5066 log->Printf("Process::RunThreadPlan(): execution stopped with unexpected state: %s.", StateAsCString(stop_state)); 5067 5068 if (stop_state == eStateExited) 5069 event_to_broadcast_sp = event_sp; 5070 5071 errors.Printf ("Execution stopped with unexpected state.\n"); 5072 return_value = eExecutionInterrupted; 5073 break; 5074 } 5075 } 5076 5077 if (keep_going) 5078 continue; 5079 else 5080 break; 5081 } 5082 else 5083 { 5084 if (log) 5085 log->PutCString ("Process::RunThreadPlan(): got_event was true, but the event pointer was null. How odd..."); 5086 return_value = eExecutionInterrupted; 5087 break; 5088 } 5089 } 5090 else 5091 { 5092 // If we didn't get an event that means we've timed out... 5093 // We will interrupt the process here. Depending on what we were asked to do we will 5094 // either exit, or try with all threads running for the same timeout. 5095 5096 if (log) { 5097 if (run_others) 5098 { 5099 uint64_t remaining_time = final_timeout - TimeValue::Now(); 5100 if (before_first_timeout) 5101 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5102 "running till for %" PRId64 " usec with all threads enabled.", 5103 remaining_time); 5104 else 5105 log->Printf ("Process::RunThreadPlan(): Restarting function with all threads enabled " 5106 "and timeout: %d timed out, abandoning execution.", 5107 timeout_usec); 5108 } 5109 else 5110 log->Printf ("Process::RunThreadPlan(): Running function with timeout: %d timed out, " 5111 "abandoning execution.", 5112 timeout_usec); 5113 } 5114 5115 // It is possible that between the time we issued the Halt, and we get around to calling Halt the target 5116 // could have stopped. That's fine, Halt will figure that out and send the appropriate Stopped event. 5117 // BUT it is also possible that we stopped & restarted (e.g. hit a signal with "stop" set to false.) In 5118 // that case, we'll get the stopped & restarted event, and we should go back to waiting for the Halt's 5119 // stopped event. That's what this while loop does. 5120 5121 bool back_to_top = true; 5122 uint32_t try_halt_again = 0; 5123 bool do_halt = true; 5124 const uint32_t num_retries = 5; 5125 while (try_halt_again < num_retries) 5126 { 5127 Error halt_error; 5128 if (do_halt) 5129 { 5130 if (log) 5131 log->Printf ("Process::RunThreadPlan(): Running Halt."); 5132 halt_error = Halt(); 5133 } 5134 if (halt_error.Success()) 5135 { 5136 if (log) 5137 log->PutCString ("Process::RunThreadPlan(): Halt succeeded."); 5138 5139 real_timeout = TimeValue::Now(); 5140 real_timeout.OffsetWithMicroSeconds(500000); 5141 5142 got_event = listener.WaitForEvent(&real_timeout, event_sp); 5143 5144 if (got_event) 5145 { 5146 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5147 if (log) 5148 { 5149 log->Printf ("Process::RunThreadPlan(): Stopped with event: %s", StateAsCString(stop_state)); 5150 if (stop_state == lldb::eStateStopped 5151 && Process::ProcessEventData::GetInterruptedFromEvent(event_sp.get())) 5152 log->PutCString (" Event was the Halt interruption event."); 5153 } 5154 5155 if (stop_state == lldb::eStateStopped) 5156 { 5157 // Between the time we initiated the Halt and the time we delivered it, the process could have 5158 // already finished its job. Check that here: 5159 5160 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 5161 { 5162 if (log) 5163 log->PutCString ("Process::RunThreadPlan(): Even though we timed out, the call plan was done. " 5164 "Exiting wait loop."); 5165 return_value = eExecutionCompleted; 5166 back_to_top = false; 5167 break; 5168 } 5169 5170 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5171 { 5172 if (log) 5173 log->PutCString ("Process::RunThreadPlan(): Went to halt but got a restarted event, there must be an un-restarted stopped event so try again... " 5174 "Exiting wait loop."); 5175 try_halt_again++; 5176 do_halt = false; 5177 continue; 5178 } 5179 5180 if (!run_others) 5181 { 5182 if (log) 5183 log->PutCString ("Process::RunThreadPlan(): try_all_threads was false, we stopped so now we're quitting."); 5184 return_value = eExecutionInterrupted; 5185 back_to_top = false; 5186 break; 5187 } 5188 5189 if (before_first_timeout) 5190 { 5191 // Set all the other threads to run, and return to the top of the loop, which will continue; 5192 before_first_timeout = false; 5193 thread_plan_sp->SetStopOthers (false); 5194 if (log) 5195 log->PutCString ("Process::RunThreadPlan(): about to resume."); 5196 5197 back_to_top = true; 5198 break; 5199 } 5200 else 5201 { 5202 // Running all threads failed, so return Interrupted. 5203 if (log) 5204 log->PutCString("Process::RunThreadPlan(): running all threads timed out."); 5205 return_value = eExecutionInterrupted; 5206 back_to_top = false; 5207 break; 5208 } 5209 } 5210 } 5211 else 5212 { if (log) 5213 log->PutCString("Process::RunThreadPlan(): halt said it succeeded, but I got no event. " 5214 "I'm getting out of here passing Interrupted."); 5215 return_value = eExecutionInterrupted; 5216 back_to_top = false; 5217 break; 5218 } 5219 } 5220 else 5221 { 5222 try_halt_again++; 5223 continue; 5224 } 5225 } 5226 5227 if (!back_to_top || try_halt_again > num_retries) 5228 break; 5229 else 5230 continue; 5231 } 5232 } // END WAIT LOOP 5233 5234 // If we had to start up a temporary private state thread to run this thread plan, shut it down now. 5235 if (IS_VALID_LLDB_HOST_THREAD(backup_private_state_thread)) 5236 { 5237 StopPrivateStateThread(); 5238 Error error; 5239 m_private_state_thread = backup_private_state_thread; 5240 if (stopper_base_plan_sp) 5241 { 5242 thread->DiscardThreadPlansUpToPlan(stopper_base_plan_sp); 5243 } 5244 m_public_state.SetValueNoLock(old_state); 5245 5246 } 5247 5248 // Restore the thread state if we are going to discard the plan execution. There are three cases where this 5249 // could happen: 5250 // 1) The execution successfully completed 5251 // 2) We hit a breakpoint, and ignore_breakpoints was true 5252 // 3) We got some other error, and discard_on_error was true 5253 bool should_unwind = (return_value == eExecutionInterrupted && unwind_on_error) 5254 || (return_value == eExecutionHitBreakpoint && ignore_breakpoints); 5255 5256 if (return_value == eExecutionCompleted 5257 || should_unwind) 5258 { 5259 thread_plan_sp->RestoreThreadState(); 5260 } 5261 5262 // Now do some processing on the results of the run: 5263 if (return_value == eExecutionInterrupted || return_value == eExecutionHitBreakpoint) 5264 { 5265 if (log) 5266 { 5267 StreamString s; 5268 if (event_sp) 5269 event_sp->Dump (&s); 5270 else 5271 { 5272 log->PutCString ("Process::RunThreadPlan(): Stop event that interrupted us is NULL."); 5273 } 5274 5275 StreamString ts; 5276 5277 const char *event_explanation = NULL; 5278 5279 do 5280 { 5281 if (!event_sp) 5282 { 5283 event_explanation = "<no event>"; 5284 break; 5285 } 5286 else if (event_sp->GetType() == eBroadcastBitInterrupt) 5287 { 5288 event_explanation = "<user interrupt>"; 5289 break; 5290 } 5291 else 5292 { 5293 const Process::ProcessEventData *event_data = Process::ProcessEventData::GetEventDataFromEvent (event_sp.get()); 5294 5295 if (!event_data) 5296 { 5297 event_explanation = "<no event data>"; 5298 break; 5299 } 5300 5301 Process *process = event_data->GetProcessSP().get(); 5302 5303 if (!process) 5304 { 5305 event_explanation = "<no process>"; 5306 break; 5307 } 5308 5309 ThreadList &thread_list = process->GetThreadList(); 5310 5311 uint32_t num_threads = thread_list.GetSize(); 5312 uint32_t thread_index; 5313 5314 ts.Printf("<%u threads> ", num_threads); 5315 5316 for (thread_index = 0; 5317 thread_index < num_threads; 5318 ++thread_index) 5319 { 5320 Thread *thread = thread_list.GetThreadAtIndex(thread_index).get(); 5321 5322 if (!thread) 5323 { 5324 ts.Printf("<?> "); 5325 continue; 5326 } 5327 5328 ts.Printf("<0x%4.4" PRIx64 " ", thread->GetID()); 5329 RegisterContext *register_context = thread->GetRegisterContext().get(); 5330 5331 if (register_context) 5332 ts.Printf("[ip 0x%" PRIx64 "] ", register_context->GetPC()); 5333 else 5334 ts.Printf("[ip unknown] "); 5335 5336 lldb::StopInfoSP stop_info_sp = thread->GetStopInfo(); 5337 if (stop_info_sp) 5338 { 5339 const char *stop_desc = stop_info_sp->GetDescription(); 5340 if (stop_desc) 5341 ts.PutCString (stop_desc); 5342 } 5343 ts.Printf(">"); 5344 } 5345 5346 event_explanation = ts.GetData(); 5347 } 5348 } while (0); 5349 5350 if (event_explanation) 5351 log->Printf("Process::RunThreadPlan(): execution interrupted: %s %s", s.GetData(), event_explanation); 5352 else 5353 log->Printf("Process::RunThreadPlan(): execution interrupted: %s", s.GetData()); 5354 } 5355 5356 if (should_unwind && thread_plan_sp) 5357 { 5358 if (log) 5359 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - discarding thread plans up to %p.", thread_plan_sp.get()); 5360 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 5361 thread_plan_sp->SetPrivate (orig_plan_private); 5362 } 5363 else 5364 { 5365 if (log) 5366 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - for plan: %p not discarding.", thread_plan_sp.get()); 5367 } 5368 } 5369 else if (return_value == eExecutionSetupError) 5370 { 5371 if (log) 5372 log->PutCString("Process::RunThreadPlan(): execution set up error."); 5373 5374 if (unwind_on_error && thread_plan_sp) 5375 { 5376 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 5377 thread_plan_sp->SetPrivate (orig_plan_private); 5378 } 5379 } 5380 else 5381 { 5382 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 5383 { 5384 if (log) 5385 log->PutCString("Process::RunThreadPlan(): thread plan is done"); 5386 return_value = eExecutionCompleted; 5387 } 5388 else if (thread->WasThreadPlanDiscarded (thread_plan_sp.get())) 5389 { 5390 if (log) 5391 log->PutCString("Process::RunThreadPlan(): thread plan was discarded"); 5392 return_value = eExecutionDiscarded; 5393 } 5394 else 5395 { 5396 if (log) 5397 log->PutCString("Process::RunThreadPlan(): thread plan stopped in mid course"); 5398 if (unwind_on_error && thread_plan_sp) 5399 { 5400 if (log) 5401 log->PutCString("Process::RunThreadPlan(): discarding thread plan 'cause unwind_on_error is set."); 5402 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 5403 thread_plan_sp->SetPrivate (orig_plan_private); 5404 } 5405 } 5406 } 5407 5408 // Thread we ran the function in may have gone away because we ran the target 5409 // Check that it's still there, and if it is put it back in the context. Also restore the 5410 // frame in the context if it is still present. 5411 thread = GetThreadList().FindThreadByIndexID(thread_idx_id, true).get(); 5412 if (thread) 5413 { 5414 exe_ctx.SetFrameSP (thread->GetFrameWithStackID (ctx_frame_id)); 5415 } 5416 5417 // Also restore the current process'es selected frame & thread, since this function calling may 5418 // be done behind the user's back. 5419 5420 if (selected_tid != LLDB_INVALID_THREAD_ID) 5421 { 5422 if (GetThreadList().SetSelectedThreadByIndexID (selected_tid) && selected_stack_id.IsValid()) 5423 { 5424 // We were able to restore the selected thread, now restore the frame: 5425 StackFrameSP old_frame_sp = GetThreadList().GetSelectedThread()->GetFrameWithStackID(selected_stack_id); 5426 if (old_frame_sp) 5427 GetThreadList().GetSelectedThread()->SetSelectedFrame(old_frame_sp.get()); 5428 } 5429 } 5430 } 5431 5432 // If the process exited during the run of the thread plan, notify everyone. 5433 5434 if (event_to_broadcast_sp) 5435 { 5436 if (log) 5437 log->PutCString("Process::RunThreadPlan(): rebroadcasting event."); 5438 BroadcastEvent(event_to_broadcast_sp); 5439 } 5440 5441 return return_value; 5442 } 5443 5444 const char * 5445 Process::ExecutionResultAsCString (ExecutionResults result) 5446 { 5447 const char *result_name; 5448 5449 switch (result) 5450 { 5451 case eExecutionCompleted: 5452 result_name = "eExecutionCompleted"; 5453 break; 5454 case eExecutionDiscarded: 5455 result_name = "eExecutionDiscarded"; 5456 break; 5457 case eExecutionInterrupted: 5458 result_name = "eExecutionInterrupted"; 5459 break; 5460 case eExecutionHitBreakpoint: 5461 result_name = "eExecutionHitBreakpoint"; 5462 break; 5463 case eExecutionSetupError: 5464 result_name = "eExecutionSetupError"; 5465 break; 5466 case eExecutionTimedOut: 5467 result_name = "eExecutionTimedOut"; 5468 break; 5469 } 5470 return result_name; 5471 } 5472 5473 void 5474 Process::GetStatus (Stream &strm) 5475 { 5476 const StateType state = GetState(); 5477 if (StateIsStoppedState(state, false)) 5478 { 5479 if (state == eStateExited) 5480 { 5481 int exit_status = GetExitStatus(); 5482 const char *exit_description = GetExitDescription(); 5483 strm.Printf ("Process %" PRIu64 " exited with status = %i (0x%8.8x) %s\n", 5484 GetID(), 5485 exit_status, 5486 exit_status, 5487 exit_description ? exit_description : ""); 5488 } 5489 else 5490 { 5491 if (state == eStateConnected) 5492 strm.Printf ("Connected to remote target.\n"); 5493 else 5494 strm.Printf ("Process %" PRIu64 " %s\n", GetID(), StateAsCString (state)); 5495 } 5496 } 5497 else 5498 { 5499 strm.Printf ("Process %" PRIu64 " is running.\n", GetID()); 5500 } 5501 } 5502 5503 size_t 5504 Process::GetThreadStatus (Stream &strm, 5505 bool only_threads_with_stop_reason, 5506 uint32_t start_frame, 5507 uint32_t num_frames, 5508 uint32_t num_frames_with_source) 5509 { 5510 size_t num_thread_infos_dumped = 0; 5511 5512 Mutex::Locker locker (GetThreadList().GetMutex()); 5513 const size_t num_threads = GetThreadList().GetSize(); 5514 for (uint32_t i = 0; i < num_threads; i++) 5515 { 5516 Thread *thread = GetThreadList().GetThreadAtIndex(i).get(); 5517 if (thread) 5518 { 5519 if (only_threads_with_stop_reason) 5520 { 5521 StopInfoSP stop_info_sp = thread->GetStopInfo(); 5522 if (stop_info_sp.get() == NULL || !stop_info_sp->IsValid()) 5523 continue; 5524 } 5525 thread->GetStatus (strm, 5526 start_frame, 5527 num_frames, 5528 num_frames_with_source); 5529 ++num_thread_infos_dumped; 5530 } 5531 } 5532 return num_thread_infos_dumped; 5533 } 5534 5535 void 5536 Process::AddInvalidMemoryRegion (const LoadRange ®ion) 5537 { 5538 m_memory_cache.AddInvalidRange(region.GetRangeBase(), region.GetByteSize()); 5539 } 5540 5541 bool 5542 Process::RemoveInvalidMemoryRange (const LoadRange ®ion) 5543 { 5544 return m_memory_cache.RemoveInvalidRange(region.GetRangeBase(), region.GetByteSize()); 5545 } 5546 5547 void 5548 Process::AddPreResumeAction (PreResumeActionCallback callback, void *baton) 5549 { 5550 m_pre_resume_actions.push_back(PreResumeCallbackAndBaton (callback, baton)); 5551 } 5552 5553 bool 5554 Process::RunPreResumeActions () 5555 { 5556 bool result = true; 5557 while (!m_pre_resume_actions.empty()) 5558 { 5559 struct PreResumeCallbackAndBaton action = m_pre_resume_actions.back(); 5560 m_pre_resume_actions.pop_back(); 5561 bool this_result = action.callback (action.baton); 5562 if (result == true) result = this_result; 5563 } 5564 return result; 5565 } 5566 5567 void 5568 Process::ClearPreResumeActions () 5569 { 5570 m_pre_resume_actions.clear(); 5571 } 5572 5573 void 5574 Process::Flush () 5575 { 5576 m_thread_list.Flush(); 5577 } 5578 5579 void 5580 Process::DidExec () 5581 { 5582 Target &target = GetTarget(); 5583 target.CleanupProcess (); 5584 ModuleList unloaded_modules (target.GetImages()); 5585 target.ModulesDidUnload (unloaded_modules); 5586 target.GetSectionLoadList().Clear(); 5587 m_dynamic_checkers_ap.reset(); 5588 m_abi_sp.reset(); 5589 m_os_ap.reset(); 5590 m_dyld_ap.reset(); 5591 m_image_tokens.clear(); 5592 m_allocated_memory_cache.Clear(); 5593 m_language_runtimes.clear(); 5594 m_thread_list.DiscardThreadPlans(); 5595 m_memory_cache.Clear(true); 5596 DoDidExec(); 5597 CompleteAttach (); 5598 } 5599 5600 Process::ReservationCache::ReservationCache (Process &process) : m_process(process) 5601 { 5602 m_mod_id = process.GetModID(); 5603 } 5604 5605 void 5606 Process::ReservationCache::Reserve (lldb::addr_t addr, size_t size) 5607 { 5608 CheckModID(); 5609 m_reserved_cache[addr] = size; 5610 } 5611 5612 void 5613 Process::ReservationCache::Unreserve (lldb::addr_t addr) 5614 { 5615 CheckModID(); 5616 ReservedMap::iterator iter = m_reserved_cache.find(addr); 5617 5618 if (iter != m_reserved_cache.end()) 5619 { 5620 size_t size = iter->second; 5621 m_reserved_cache.erase(iter); 5622 m_free_cache[size].push_back(addr); 5623 } 5624 } 5625 5626 lldb::addr_t 5627 Process::ReservationCache::Find (size_t size) 5628 { 5629 CheckModID(); 5630 lldb::addr_t ret = LLDB_INVALID_ADDRESS; 5631 FreeMap::iterator map_iter = m_free_cache.find(size); 5632 if (map_iter != m_free_cache.end()) 5633 { 5634 if (!map_iter->second.empty()) 5635 { 5636 ret = map_iter->second.back(); 5637 map_iter->second.pop_back(); 5638 m_reserved_cache[ret] = size; 5639 } 5640 } 5641 5642 return ret; 5643 } 5644 5645 void 5646 Process::ReservationCache::CheckModID() 5647 { 5648 if (m_mod_id != m_process.GetModID()) 5649 { 5650 // wipe all our caches, they're invalid 5651 m_reserved_cache.clear(); 5652 m_free_cache.clear(); 5653 m_mod_id = m_process.GetModID(); 5654 } 5655 } 5656