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/Debugger.h" 20 #include "lldb/Core/Log.h" 21 #include "lldb/Core/Module.h" 22 #include "lldb/Core/PluginManager.h" 23 #include "lldb/Core/State.h" 24 #include "lldb/Core/StreamFile.h" 25 #include "lldb/Expression/ClangUserExpression.h" 26 #include "lldb/Host/ConnectionFileDescriptor.h" 27 #include "lldb/Host/Host.h" 28 #include "lldb/Host/HostInfo.h" 29 #include "lldb/Host/Pipe.h" 30 #include "lldb/Host/Terminal.h" 31 #include "lldb/Host/ThreadLauncher.h" 32 #include "lldb/Interpreter/CommandInterpreter.h" 33 #include "lldb/Symbol/Symbol.h" 34 #include "lldb/Target/ABI.h" 35 #include "lldb/Target/DynamicLoader.h" 36 #include "lldb/Target/JITLoader.h" 37 #include "lldb/Target/MemoryHistory.h" 38 #include "lldb/Target/OperatingSystem.h" 39 #include "lldb/Target/LanguageRuntime.h" 40 #include "lldb/Target/CPPLanguageRuntime.h" 41 #include "lldb/Target/ObjCLanguageRuntime.h" 42 #include "lldb/Target/Platform.h" 43 #include "lldb/Target/RegisterContext.h" 44 #include "lldb/Target/StopInfo.h" 45 #include "lldb/Target/SystemRuntime.h" 46 #include "lldb/Target/Target.h" 47 #include "lldb/Target/TargetList.h" 48 #include "lldb/Target/Thread.h" 49 #include "lldb/Target/ThreadPlan.h" 50 #include "lldb/Target/ThreadPlanBase.h" 51 #include "lldb/Target/InstrumentationRuntime.h" 52 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 53 54 using namespace lldb; 55 using namespace lldb_private; 56 57 58 // Comment out line below to disable memory caching, overriding the process setting 59 // target.process.disable-memory-cache 60 #define ENABLE_MEMORY_CACHING 61 62 #ifdef ENABLE_MEMORY_CACHING 63 #define DISABLE_MEM_CACHE_DEFAULT false 64 #else 65 #define DISABLE_MEM_CACHE_DEFAULT true 66 #endif 67 68 class ProcessOptionValueProperties : public OptionValueProperties 69 { 70 public: 71 ProcessOptionValueProperties (const ConstString &name) : 72 OptionValueProperties (name) 73 { 74 } 75 76 // This constructor is used when creating ProcessOptionValueProperties when it 77 // is part of a new lldb_private::Process instance. It will copy all current 78 // global property values as needed 79 ProcessOptionValueProperties (ProcessProperties *global_properties) : 80 OptionValueProperties(*global_properties->GetValueProperties()) 81 { 82 } 83 84 virtual const Property * 85 GetPropertyAtIndex (const ExecutionContext *exe_ctx, bool will_modify, uint32_t idx) const 86 { 87 // When getting the value for a key from the process options, we will always 88 // try and grab the setting from the current process if there is one. Else we just 89 // use the one from this instance. 90 if (exe_ctx) 91 { 92 Process *process = exe_ctx->GetProcessPtr(); 93 if (process) 94 { 95 ProcessOptionValueProperties *instance_properties = static_cast<ProcessOptionValueProperties *>(process->GetValueProperties().get()); 96 if (this != instance_properties) 97 return instance_properties->ProtectedGetPropertyAtIndex (idx); 98 } 99 } 100 return ProtectedGetPropertyAtIndex (idx); 101 } 102 }; 103 104 static PropertyDefinition 105 g_properties[] = 106 { 107 { "disable-memory-cache" , OptionValue::eTypeBoolean, false, DISABLE_MEM_CACHE_DEFAULT, NULL, NULL, "Disable reading and caching of memory in fixed-size units." }, 108 { "extra-startup-command", OptionValue::eTypeArray , false, OptionValue::eTypeString, NULL, NULL, "A list containing extra commands understood by the particular process plugin used. " 109 "For instance, to turn on debugserver logging set this to \"QSetLogging:bitmask=LOG_DEFAULT;\"" }, 110 { "ignore-breakpoints-in-expressions", OptionValue::eTypeBoolean, true, true, NULL, NULL, "If true, breakpoints will be ignored during expression evaluation." }, 111 { "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." }, 112 { "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." }, 113 { "stop-on-sharedlibrary-events" , OptionValue::eTypeBoolean, true, false, NULL, NULL, "If true, stop when a shared library is loaded or unloaded." }, 114 { "detach-keeps-stopped" , OptionValue::eTypeBoolean, true, false, NULL, NULL, "If true, detach will attempt to keep the process stopped." }, 115 { "memory-cache-line-size" , OptionValue::eTypeUInt64, false, 512, NULL, NULL, "The memory cache line size" }, 116 { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } 117 }; 118 119 enum { 120 ePropertyDisableMemCache, 121 ePropertyExtraStartCommand, 122 ePropertyIgnoreBreakpointsInExpressions, 123 ePropertyUnwindOnErrorInExpressions, 124 ePropertyPythonOSPluginPath, 125 ePropertyStopOnSharedLibraryEvents, 126 ePropertyDetachKeepsStopped, 127 ePropertyMemCacheLineSize 128 }; 129 130 ProcessProperties::ProcessProperties (bool is_global) : 131 Properties () 132 { 133 if (is_global) 134 { 135 m_collection_sp.reset (new ProcessOptionValueProperties(ConstString("process"))); 136 m_collection_sp->Initialize(g_properties); 137 m_collection_sp->AppendProperty(ConstString("thread"), 138 ConstString("Settings specific to threads."), 139 true, 140 Thread::GetGlobalProperties()->GetValueProperties()); 141 } 142 else 143 m_collection_sp.reset (new ProcessOptionValueProperties(Process::GetGlobalProperties().get())); 144 } 145 146 ProcessProperties::~ProcessProperties() 147 { 148 } 149 150 bool 151 ProcessProperties::GetDisableMemoryCache() const 152 { 153 const uint32_t idx = ePropertyDisableMemCache; 154 return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0); 155 } 156 157 uint64_t 158 ProcessProperties::GetMemoryCacheLineSize() const 159 { 160 const uint32_t idx = ePropertyMemCacheLineSize; 161 return m_collection_sp->GetPropertyAtIndexAsUInt64 (NULL, idx, g_properties[idx].default_uint_value); 162 } 163 164 Args 165 ProcessProperties::GetExtraStartupCommands () const 166 { 167 Args args; 168 const uint32_t idx = ePropertyExtraStartCommand; 169 m_collection_sp->GetPropertyAtIndexAsArgs(NULL, idx, args); 170 return args; 171 } 172 173 void 174 ProcessProperties::SetExtraStartupCommands (const Args &args) 175 { 176 const uint32_t idx = ePropertyExtraStartCommand; 177 m_collection_sp->SetPropertyAtIndexFromArgs(NULL, idx, args); 178 } 179 180 FileSpec 181 ProcessProperties::GetPythonOSPluginPath () const 182 { 183 const uint32_t idx = ePropertyPythonOSPluginPath; 184 return m_collection_sp->GetPropertyAtIndexAsFileSpec(NULL, idx); 185 } 186 187 void 188 ProcessProperties::SetPythonOSPluginPath (const FileSpec &file) 189 { 190 const uint32_t idx = ePropertyPythonOSPluginPath; 191 m_collection_sp->SetPropertyAtIndexAsFileSpec(NULL, idx, file); 192 } 193 194 195 bool 196 ProcessProperties::GetIgnoreBreakpointsInExpressions () const 197 { 198 const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions; 199 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 200 } 201 202 void 203 ProcessProperties::SetIgnoreBreakpointsInExpressions (bool ignore) 204 { 205 const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions; 206 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, ignore); 207 } 208 209 bool 210 ProcessProperties::GetUnwindOnErrorInExpressions () const 211 { 212 const uint32_t idx = ePropertyUnwindOnErrorInExpressions; 213 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 214 } 215 216 void 217 ProcessProperties::SetUnwindOnErrorInExpressions (bool ignore) 218 { 219 const uint32_t idx = ePropertyUnwindOnErrorInExpressions; 220 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, ignore); 221 } 222 223 bool 224 ProcessProperties::GetStopOnSharedLibraryEvents () const 225 { 226 const uint32_t idx = ePropertyStopOnSharedLibraryEvents; 227 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 228 } 229 230 void 231 ProcessProperties::SetStopOnSharedLibraryEvents (bool stop) 232 { 233 const uint32_t idx = ePropertyStopOnSharedLibraryEvents; 234 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, stop); 235 } 236 237 bool 238 ProcessProperties::GetDetachKeepsStopped () const 239 { 240 const uint32_t idx = ePropertyDetachKeepsStopped; 241 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 242 } 243 244 void 245 ProcessProperties::SetDetachKeepsStopped (bool stop) 246 { 247 const uint32_t idx = ePropertyDetachKeepsStopped; 248 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, stop); 249 } 250 251 void 252 ProcessInstanceInfo::Dump (Stream &s, Platform *platform) const 253 { 254 const char *cstr; 255 if (m_pid != LLDB_INVALID_PROCESS_ID) 256 s.Printf (" pid = %" PRIu64 "\n", m_pid); 257 258 if (m_parent_pid != LLDB_INVALID_PROCESS_ID) 259 s.Printf (" parent = %" PRIu64 "\n", m_parent_pid); 260 261 if (m_executable) 262 { 263 s.Printf (" name = %s\n", m_executable.GetFilename().GetCString()); 264 s.PutCString (" file = "); 265 m_executable.Dump(&s); 266 s.EOL(); 267 } 268 const uint32_t argc = m_arguments.GetArgumentCount(); 269 if (argc > 0) 270 { 271 for (uint32_t i=0; i<argc; i++) 272 { 273 const char *arg = m_arguments.GetArgumentAtIndex(i); 274 if (i < 10) 275 s.Printf (" arg[%u] = %s\n", i, arg); 276 else 277 s.Printf ("arg[%u] = %s\n", i, arg); 278 } 279 } 280 281 const uint32_t envc = m_environment.GetArgumentCount(); 282 if (envc > 0) 283 { 284 for (uint32_t i=0; i<envc; i++) 285 { 286 const char *env = m_environment.GetArgumentAtIndex(i); 287 if (i < 10) 288 s.Printf (" env[%u] = %s\n", i, env); 289 else 290 s.Printf ("env[%u] = %s\n", i, env); 291 } 292 } 293 294 if (m_arch.IsValid()) 295 s.Printf (" arch = %s\n", m_arch.GetTriple().str().c_str()); 296 297 if (m_uid != UINT32_MAX) 298 { 299 cstr = platform->GetUserName (m_uid); 300 s.Printf (" uid = %-5u (%s)\n", m_uid, cstr ? cstr : ""); 301 } 302 if (m_gid != UINT32_MAX) 303 { 304 cstr = platform->GetGroupName (m_gid); 305 s.Printf (" gid = %-5u (%s)\n", m_gid, cstr ? cstr : ""); 306 } 307 if (m_euid != UINT32_MAX) 308 { 309 cstr = platform->GetUserName (m_euid); 310 s.Printf (" euid = %-5u (%s)\n", m_euid, cstr ? cstr : ""); 311 } 312 if (m_egid != UINT32_MAX) 313 { 314 cstr = platform->GetGroupName (m_egid); 315 s.Printf (" egid = %-5u (%s)\n", m_egid, cstr ? cstr : ""); 316 } 317 } 318 319 void 320 ProcessInstanceInfo::DumpTableHeader (Stream &s, Platform *platform, bool show_args, bool verbose) 321 { 322 const char *label; 323 if (show_args || verbose) 324 label = "ARGUMENTS"; 325 else 326 label = "NAME"; 327 328 if (verbose) 329 { 330 s.Printf ("PID PARENT USER GROUP EFF USER EFF GROUP TRIPLE %s\n", label); 331 s.PutCString ("====== ====== ========== ========== ========== ========== ======================== ============================\n"); 332 } 333 else 334 { 335 s.Printf ("PID PARENT USER TRIPLE %s\n", label); 336 s.PutCString ("====== ====== ========== ======================== ============================\n"); 337 } 338 } 339 340 void 341 ProcessInstanceInfo::DumpAsTableRow (Stream &s, Platform *platform, bool show_args, bool verbose) const 342 { 343 if (m_pid != LLDB_INVALID_PROCESS_ID) 344 { 345 const char *cstr; 346 s.Printf ("%-6" PRIu64 " %-6" PRIu64 " ", m_pid, m_parent_pid); 347 348 349 if (verbose) 350 { 351 cstr = platform->GetUserName (m_uid); 352 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 353 s.Printf ("%-10s ", cstr); 354 else 355 s.Printf ("%-10u ", m_uid); 356 357 cstr = platform->GetGroupName (m_gid); 358 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 359 s.Printf ("%-10s ", cstr); 360 else 361 s.Printf ("%-10u ", m_gid); 362 363 cstr = platform->GetUserName (m_euid); 364 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 365 s.Printf ("%-10s ", cstr); 366 else 367 s.Printf ("%-10u ", m_euid); 368 369 cstr = platform->GetGroupName (m_egid); 370 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 371 s.Printf ("%-10s ", cstr); 372 else 373 s.Printf ("%-10u ", m_egid); 374 s.Printf ("%-24s ", m_arch.IsValid() ? m_arch.GetTriple().str().c_str() : ""); 375 } 376 else 377 { 378 s.Printf ("%-10s %-24s ", 379 platform->GetUserName (m_euid), 380 m_arch.IsValid() ? m_arch.GetTriple().str().c_str() : ""); 381 } 382 383 if (verbose || show_args) 384 { 385 const uint32_t argc = m_arguments.GetArgumentCount(); 386 if (argc > 0) 387 { 388 for (uint32_t i=0; i<argc; i++) 389 { 390 if (i > 0) 391 s.PutChar (' '); 392 s.PutCString (m_arguments.GetArgumentAtIndex(i)); 393 } 394 } 395 } 396 else 397 { 398 s.PutCString (GetName()); 399 } 400 401 s.EOL(); 402 } 403 } 404 405 Error 406 ProcessLaunchCommandOptions::SetOptionValue (uint32_t option_idx, const char *option_arg) 407 { 408 Error error; 409 const int short_option = m_getopt_table[option_idx].val; 410 411 switch (short_option) 412 { 413 case 's': // Stop at program entry point 414 launch_info.GetFlags().Set (eLaunchFlagStopAtEntry); 415 break; 416 417 case 'i': // STDIN for read only 418 { 419 FileAction action; 420 if (action.Open (STDIN_FILENO, option_arg, true, false)) 421 launch_info.AppendFileAction (action); 422 break; 423 } 424 425 case 'o': // Open STDOUT for write only 426 { 427 FileAction action; 428 if (action.Open (STDOUT_FILENO, option_arg, false, true)) 429 launch_info.AppendFileAction (action); 430 break; 431 } 432 433 case 'e': // STDERR for write only 434 { 435 FileAction action; 436 if (action.Open (STDERR_FILENO, option_arg, false, true)) 437 launch_info.AppendFileAction (action); 438 break; 439 } 440 441 case 'p': // Process plug-in name 442 launch_info.SetProcessPluginName (option_arg); 443 break; 444 445 case 'n': // Disable STDIO 446 { 447 FileAction action; 448 if (action.Open (STDIN_FILENO, "/dev/null", true, false)) 449 launch_info.AppendFileAction (action); 450 if (action.Open (STDOUT_FILENO, "/dev/null", false, true)) 451 launch_info.AppendFileAction (action); 452 if (action.Open (STDERR_FILENO, "/dev/null", false, true)) 453 launch_info.AppendFileAction (action); 454 break; 455 } 456 457 case 'w': 458 launch_info.SetWorkingDirectory (option_arg); 459 break; 460 461 case 't': // Open process in new terminal window 462 launch_info.GetFlags().Set (eLaunchFlagLaunchInTTY); 463 break; 464 465 case 'a': 466 if (!launch_info.GetArchitecture().SetTriple (option_arg, m_interpreter.GetPlatform(true).get())) 467 launch_info.GetArchitecture().SetTriple (option_arg); 468 break; 469 470 case 'A': // Disable ASLR. 471 { 472 bool success; 473 const bool disable_aslr_arg = Args::StringToBoolean (option_arg, true, &success); 474 if (success) 475 disable_aslr = disable_aslr_arg ? eLazyBoolYes : eLazyBoolNo; 476 else 477 error.SetErrorStringWithFormat ("Invalid boolean value for disable-aslr option: '%s'", option_arg ? option_arg : "<null>"); 478 break; 479 } 480 481 case 'c': 482 if (option_arg && option_arg[0]) 483 launch_info.SetShell (FileSpec(option_arg, false)); 484 else 485 launch_info.SetShell (HostInfo::GetDefaultShell()); 486 break; 487 488 case 'v': 489 launch_info.GetEnvironmentEntries().AppendArgument(option_arg); 490 break; 491 492 default: 493 error.SetErrorStringWithFormat("unrecognized short option character '%c'", short_option); 494 break; 495 } 496 return error; 497 } 498 499 OptionDefinition 500 ProcessLaunchCommandOptions::g_option_table[] = 501 { 502 { LLDB_OPT_SET_ALL, false, "stop-at-entry", 's', OptionParser::eNoArgument, NULL, NULL, 0, eArgTypeNone, "Stop at the entry point of the program when launching a process."}, 503 { LLDB_OPT_SET_ALL, false, "disable-aslr", 'A', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeBoolean, "Set whether to disable address space layout randomization when launching a process."}, 504 { LLDB_OPT_SET_ALL, false, "plugin", 'p', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypePlugin, "Name of the process plugin you want to use."}, 505 { LLDB_OPT_SET_ALL, false, "working-dir", 'w', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeDirectoryName, "Set the current working directory to <path> when running the inferior."}, 506 { LLDB_OPT_SET_ALL, false, "arch", 'a', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeArchitecture, "Set the architecture for the process to launch when ambiguous."}, 507 { LLDB_OPT_SET_ALL, false, "environment", 'v', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeNone, "Specify an environment variable name/value string (--environment NAME=VALUE). Can be specified multiple times for subsequent environment entries."}, 508 { LLDB_OPT_SET_ALL, false, "shell", 'c', OptionParser::eOptionalArgument, NULL, NULL, 0, eArgTypeFilename, "Run the process in a shell (not supported on all platforms)."}, 509 510 { LLDB_OPT_SET_1 , false, "stdin", 'i', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeFilename, "Redirect stdin for the process to <filename>."}, 511 { LLDB_OPT_SET_1 , false, "stdout", 'o', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeFilename, "Redirect stdout for the process to <filename>."}, 512 { LLDB_OPT_SET_1 , false, "stderr", 'e', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeFilename, "Redirect stderr for the process to <filename>."}, 513 514 { LLDB_OPT_SET_2 , false, "tty", 't', OptionParser::eNoArgument, NULL, NULL, 0, eArgTypeNone, "Start the process in a terminal (not supported on all platforms)."}, 515 516 { LLDB_OPT_SET_3 , false, "no-stdio", 'n', OptionParser::eNoArgument, NULL, NULL, 0, eArgTypeNone, "Do not set up for terminal I/O to go to running process."}, 517 518 { 0 , false, NULL, 0, 0, NULL, NULL, 0, eArgTypeNone, NULL } 519 }; 520 521 522 523 bool 524 ProcessInstanceInfoMatch::NameMatches (const char *process_name) const 525 { 526 if (m_name_match_type == eNameMatchIgnore || process_name == NULL) 527 return true; 528 const char *match_name = m_match_info.GetName(); 529 if (!match_name) 530 return true; 531 532 return lldb_private::NameMatches (process_name, m_name_match_type, match_name); 533 } 534 535 bool 536 ProcessInstanceInfoMatch::Matches (const ProcessInstanceInfo &proc_info) const 537 { 538 if (!NameMatches (proc_info.GetName())) 539 return false; 540 541 if (m_match_info.ProcessIDIsValid() && 542 m_match_info.GetProcessID() != proc_info.GetProcessID()) 543 return false; 544 545 if (m_match_info.ParentProcessIDIsValid() && 546 m_match_info.GetParentProcessID() != proc_info.GetParentProcessID()) 547 return false; 548 549 if (m_match_info.UserIDIsValid () && 550 m_match_info.GetUserID() != proc_info.GetUserID()) 551 return false; 552 553 if (m_match_info.GroupIDIsValid () && 554 m_match_info.GetGroupID() != proc_info.GetGroupID()) 555 return false; 556 557 if (m_match_info.EffectiveUserIDIsValid () && 558 m_match_info.GetEffectiveUserID() != proc_info.GetEffectiveUserID()) 559 return false; 560 561 if (m_match_info.EffectiveGroupIDIsValid () && 562 m_match_info.GetEffectiveGroupID() != proc_info.GetEffectiveGroupID()) 563 return false; 564 565 if (m_match_info.GetArchitecture().IsValid() && 566 !m_match_info.GetArchitecture().IsCompatibleMatch(proc_info.GetArchitecture())) 567 return false; 568 return true; 569 } 570 571 bool 572 ProcessInstanceInfoMatch::MatchAllProcesses () const 573 { 574 if (m_name_match_type != eNameMatchIgnore) 575 return false; 576 577 if (m_match_info.ProcessIDIsValid()) 578 return false; 579 580 if (m_match_info.ParentProcessIDIsValid()) 581 return false; 582 583 if (m_match_info.UserIDIsValid ()) 584 return false; 585 586 if (m_match_info.GroupIDIsValid ()) 587 return false; 588 589 if (m_match_info.EffectiveUserIDIsValid ()) 590 return false; 591 592 if (m_match_info.EffectiveGroupIDIsValid ()) 593 return false; 594 595 if (m_match_info.GetArchitecture().IsValid()) 596 return false; 597 598 if (m_match_all_users) 599 return false; 600 601 return true; 602 603 } 604 605 void 606 ProcessInstanceInfoMatch::Clear() 607 { 608 m_match_info.Clear(); 609 m_name_match_type = eNameMatchIgnore; 610 m_match_all_users = false; 611 } 612 613 ProcessSP 614 Process::FindPlugin (Target &target, const char *plugin_name, Listener &listener, const FileSpec *crash_file_path) 615 { 616 static uint32_t g_process_unique_id = 0; 617 618 ProcessSP process_sp; 619 ProcessCreateInstance create_callback = NULL; 620 if (plugin_name) 621 { 622 ConstString const_plugin_name(plugin_name); 623 create_callback = PluginManager::GetProcessCreateCallbackForPluginName (const_plugin_name); 624 if (create_callback) 625 { 626 process_sp = create_callback(target, listener, crash_file_path); 627 if (process_sp) 628 { 629 if (process_sp->CanDebug(target, true)) 630 { 631 process_sp->m_process_unique_id = ++g_process_unique_id; 632 } 633 else 634 process_sp.reset(); 635 } 636 } 637 } 638 else 639 { 640 for (uint32_t idx = 0; (create_callback = PluginManager::GetProcessCreateCallbackAtIndex(idx)) != NULL; ++idx) 641 { 642 process_sp = create_callback(target, listener, crash_file_path); 643 if (process_sp) 644 { 645 if (process_sp->CanDebug(target, false)) 646 { 647 process_sp->m_process_unique_id = ++g_process_unique_id; 648 break; 649 } 650 else 651 process_sp.reset(); 652 } 653 } 654 } 655 return process_sp; 656 } 657 658 ConstString & 659 Process::GetStaticBroadcasterClass () 660 { 661 static ConstString class_name ("lldb.process"); 662 return class_name; 663 } 664 665 //---------------------------------------------------------------------- 666 // Process constructor 667 //---------------------------------------------------------------------- 668 Process::Process(Target &target, Listener &listener) : 669 Process(target, listener, Host::GetUnixSignals ()) 670 { 671 // This constructor just delegates to the full Process constructor, 672 // defaulting to using the Host's UnixSignals. 673 } 674 675 Process::Process(Target &target, Listener &listener, const UnixSignalsSP &unix_signals_sp) : 676 ProcessProperties (false), 677 UserID (LLDB_INVALID_PROCESS_ID), 678 Broadcaster (&(target.GetDebugger()), "lldb.process"), 679 m_target (target), 680 m_public_state (eStateUnloaded), 681 m_private_state (eStateUnloaded), 682 m_private_state_broadcaster (NULL, "lldb.process.internal_state_broadcaster"), 683 m_private_state_control_broadcaster (NULL, "lldb.process.internal_state_control_broadcaster"), 684 m_private_state_listener ("lldb.process.internal_state_listener"), 685 m_private_state_control_wait(), 686 m_mod_id (), 687 m_process_unique_id(0), 688 m_thread_index_id (0), 689 m_thread_id_to_index_id_map (), 690 m_exit_status (-1), 691 m_exit_string (), 692 m_exit_status_mutex(), 693 m_thread_mutex (Mutex::eMutexTypeRecursive), 694 m_thread_list_real (this), 695 m_thread_list (this), 696 m_extended_thread_list (this), 697 m_extended_thread_stop_id (0), 698 m_queue_list (this), 699 m_queue_list_stop_id (0), 700 m_notifications (), 701 m_image_tokens (), 702 m_listener (listener), 703 m_breakpoint_site_list (), 704 m_dynamic_checkers_ap (), 705 m_unix_signals_sp (unix_signals_sp), 706 m_abi_sp (), 707 m_process_input_reader (), 708 m_stdio_communication ("process.stdio"), 709 m_stdio_communication_mutex (Mutex::eMutexTypeRecursive), 710 m_stdout_data (), 711 m_stderr_data (), 712 m_profile_data_comm_mutex (Mutex::eMutexTypeRecursive), 713 m_profile_data (), 714 m_iohandler_sync (false), 715 m_memory_cache (*this), 716 m_allocated_memory_cache (*this), 717 m_should_detach (false), 718 m_next_event_action_ap(), 719 m_public_run_lock (), 720 m_private_run_lock (), 721 m_currently_handling_event(false), 722 m_finalize_called(false), 723 m_clear_thread_plans_on_stop (false), 724 m_force_next_event_delivery(false), 725 m_last_broadcast_state (eStateInvalid), 726 m_destroy_in_process (false), 727 m_can_jit(eCanJITDontKnow) 728 { 729 CheckInWithManager (); 730 731 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 732 if (log) 733 log->Printf ("%p Process::Process()", static_cast<void*>(this)); 734 735 if (!m_unix_signals_sp) 736 m_unix_signals_sp.reset (new UnixSignals ()); 737 738 SetEventName (eBroadcastBitStateChanged, "state-changed"); 739 SetEventName (eBroadcastBitInterrupt, "interrupt"); 740 SetEventName (eBroadcastBitSTDOUT, "stdout-available"); 741 SetEventName (eBroadcastBitSTDERR, "stderr-available"); 742 SetEventName (eBroadcastBitProfileData, "profile-data-available"); 743 744 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlStop , "control-stop" ); 745 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlPause , "control-pause" ); 746 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlResume, "control-resume"); 747 748 listener.StartListeningForEvents (this, 749 eBroadcastBitStateChanged | 750 eBroadcastBitInterrupt | 751 eBroadcastBitSTDOUT | 752 eBroadcastBitSTDERR | 753 eBroadcastBitProfileData); 754 755 m_private_state_listener.StartListeningForEvents(&m_private_state_broadcaster, 756 eBroadcastBitStateChanged | 757 eBroadcastBitInterrupt); 758 759 m_private_state_listener.StartListeningForEvents(&m_private_state_control_broadcaster, 760 eBroadcastInternalStateControlStop | 761 eBroadcastInternalStateControlPause | 762 eBroadcastInternalStateControlResume); 763 // We need something valid here, even if just the default UnixSignalsSP. 764 assert (m_unix_signals_sp && "null m_unix_signals_sp after initialization"); 765 } 766 767 //---------------------------------------------------------------------- 768 // Destructor 769 //---------------------------------------------------------------------- 770 Process::~Process() 771 { 772 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 773 if (log) 774 log->Printf ("%p Process::~Process()", static_cast<void*>(this)); 775 StopPrivateStateThread(); 776 777 // ThreadList::Clear() will try to acquire this process's mutex, so 778 // explicitly clear the thread list here to ensure that the mutex 779 // is not destroyed before the thread list. 780 m_thread_list.Clear(); 781 } 782 783 const ProcessPropertiesSP & 784 Process::GetGlobalProperties() 785 { 786 static ProcessPropertiesSP g_settings_sp; 787 if (!g_settings_sp) 788 g_settings_sp.reset (new ProcessProperties (true)); 789 return g_settings_sp; 790 } 791 792 void 793 Process::Finalize() 794 { 795 switch (GetPrivateState()) 796 { 797 case eStateConnected: 798 case eStateAttaching: 799 case eStateLaunching: 800 case eStateStopped: 801 case eStateRunning: 802 case eStateStepping: 803 case eStateCrashed: 804 case eStateSuspended: 805 if (GetShouldDetach()) 806 { 807 // FIXME: This will have to be a process setting: 808 bool keep_stopped = false; 809 Detach(keep_stopped); 810 } 811 else 812 Destroy(); 813 break; 814 815 case eStateInvalid: 816 case eStateUnloaded: 817 case eStateDetached: 818 case eStateExited: 819 break; 820 } 821 822 // Clear our broadcaster before we proceed with destroying 823 Broadcaster::Clear(); 824 825 // Do any cleanup needed prior to being destructed... Subclasses 826 // that override this method should call this superclass method as well. 827 828 // We need to destroy the loader before the derived Process class gets destroyed 829 // since it is very likely that undoing the loader will require access to the real process. 830 m_dynamic_checkers_ap.reset(); 831 m_abi_sp.reset(); 832 m_os_ap.reset(); 833 m_system_runtime_ap.reset(); 834 m_dyld_ap.reset(); 835 m_jit_loaders_ap.reset(); 836 m_thread_list_real.Destroy(); 837 m_thread_list.Destroy(); 838 m_extended_thread_list.Destroy(); 839 m_queue_list.Clear(); 840 m_queue_list_stop_id = 0; 841 std::vector<Notifications> empty_notifications; 842 m_notifications.swap(empty_notifications); 843 m_image_tokens.clear(); 844 m_memory_cache.Clear(); 845 m_allocated_memory_cache.Clear(); 846 m_language_runtimes.clear(); 847 m_instrumentation_runtimes.clear(); 848 m_next_event_action_ap.reset(); 849 //#ifdef LLDB_CONFIGURATION_DEBUG 850 // StreamFile s(stdout, false); 851 // EventSP event_sp; 852 // while (m_private_state_listener.GetNextEvent(event_sp)) 853 // { 854 // event_sp->Dump (&s); 855 // s.EOL(); 856 // } 857 //#endif 858 // We have to be very careful here as the m_private_state_listener might 859 // contain events that have ProcessSP values in them which can keep this 860 // process around forever. These events need to be cleared out. 861 m_private_state_listener.Clear(); 862 m_public_run_lock.TrySetRunning(); // This will do nothing if already locked 863 m_public_run_lock.SetStopped(); 864 m_private_run_lock.TrySetRunning(); // This will do nothing if already locked 865 m_private_run_lock.SetStopped(); 866 m_finalize_called = true; 867 } 868 869 void 870 Process::RegisterNotificationCallbacks (const Notifications& callbacks) 871 { 872 m_notifications.push_back(callbacks); 873 if (callbacks.initialize != NULL) 874 callbacks.initialize (callbacks.baton, this); 875 } 876 877 bool 878 Process::UnregisterNotificationCallbacks(const Notifications& callbacks) 879 { 880 std::vector<Notifications>::iterator pos, end = m_notifications.end(); 881 for (pos = m_notifications.begin(); pos != end; ++pos) 882 { 883 if (pos->baton == callbacks.baton && 884 pos->initialize == callbacks.initialize && 885 pos->process_state_changed == callbacks.process_state_changed) 886 { 887 m_notifications.erase(pos); 888 return true; 889 } 890 } 891 return false; 892 } 893 894 void 895 Process::SynchronouslyNotifyStateChanged (StateType state) 896 { 897 std::vector<Notifications>::iterator notification_pos, notification_end = m_notifications.end(); 898 for (notification_pos = m_notifications.begin(); notification_pos != notification_end; ++notification_pos) 899 { 900 if (notification_pos->process_state_changed) 901 notification_pos->process_state_changed (notification_pos->baton, this, state); 902 } 903 } 904 905 // FIXME: We need to do some work on events before the general Listener sees them. 906 // For instance if we are continuing from a breakpoint, we need to ensure that we do 907 // the little "insert real insn, step & stop" trick. But we can't do that when the 908 // event is delivered by the broadcaster - since that is done on the thread that is 909 // waiting for new events, so if we needed more than one event for our handling, we would 910 // stall. So instead we do it when we fetch the event off of the queue. 911 // 912 913 StateType 914 Process::GetNextEvent (EventSP &event_sp) 915 { 916 StateType state = eStateInvalid; 917 918 if (m_listener.GetNextEventForBroadcaster (this, event_sp) && event_sp) 919 state = Process::ProcessEventData::GetStateFromEvent (event_sp.get()); 920 921 return state; 922 } 923 924 bool 925 Process::SyncIOHandler (uint64_t timeout_msec) 926 { 927 bool timed_out = false; 928 929 // don't sync (potentially context switch) in case where there is no process IO 930 if (m_process_input_reader) 931 { 932 TimeValue timeout = TimeValue::Now(); 933 timeout.OffsetWithMicroSeconds(timeout_msec*1000); 934 935 m_iohandler_sync.WaitForValueEqualTo(true, &timeout, &timed_out); 936 937 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 938 if(log) 939 { 940 if(timed_out) 941 log->Printf ("Process::%s pid %" PRIu64 " (timeout=%" PRIu64 "ms): FAIL", __FUNCTION__, GetID (), timeout_msec); 942 else 943 log->Printf ("Process::%s pid %" PRIu64 ": SUCCESS", __FUNCTION__, GetID ()); 944 } 945 946 // reset sync one-shot so it will be ready for next launch 947 m_iohandler_sync.SetValue(false, eBroadcastNever); 948 } 949 950 return !timed_out; 951 } 952 953 StateType 954 Process::WaitForProcessToStop (const TimeValue *timeout, 955 EventSP *event_sp_ptr, 956 bool wait_always, 957 Listener *hijack_listener, 958 Stream *stream) 959 { 960 // We can't just wait for a "stopped" event, because the stopped event may have restarted the target. 961 // We have to actually check each event, and in the case of a stopped event check the restarted flag 962 // on the event. 963 if (event_sp_ptr) 964 event_sp_ptr->reset(); 965 StateType state = GetState(); 966 // If we are exited or detached, we won't ever get back to any 967 // other valid state... 968 if (state == eStateDetached || state == eStateExited) 969 return state; 970 971 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 972 if (log) 973 log->Printf ("Process::%s (timeout = %p)", __FUNCTION__, 974 static_cast<const void*>(timeout)); 975 976 if (!wait_always && 977 StateIsStoppedState(state, true) && 978 StateIsStoppedState(GetPrivateState(), true)) { 979 if (log) 980 log->Printf("Process::%s returning without waiting for events; process private and public states are already 'stopped'.", 981 __FUNCTION__); 982 return state; 983 } 984 985 while (state != eStateInvalid) 986 { 987 EventSP event_sp; 988 state = WaitForStateChangedEvents (timeout, event_sp, hijack_listener); 989 if (event_sp_ptr && event_sp) 990 *event_sp_ptr = event_sp; 991 992 bool pop_process_io_handler = hijack_listener != NULL; 993 Process::HandleProcessStateChangedEvent (event_sp, stream, pop_process_io_handler); 994 995 switch (state) 996 { 997 case eStateCrashed: 998 case eStateDetached: 999 case eStateExited: 1000 case eStateUnloaded: 1001 // We need to toggle the run lock as this won't get done in 1002 // SetPublicState() if the process is hijacked. 1003 if (hijack_listener) 1004 m_public_run_lock.SetStopped(); 1005 return state; 1006 case eStateStopped: 1007 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 1008 continue; 1009 else 1010 { 1011 // We need to toggle the run lock as this won't get done in 1012 // SetPublicState() if the process is hijacked. 1013 if (hijack_listener) 1014 m_public_run_lock.SetStopped(); 1015 return state; 1016 } 1017 default: 1018 continue; 1019 } 1020 } 1021 return state; 1022 } 1023 1024 bool 1025 Process::HandleProcessStateChangedEvent (const EventSP &event_sp, 1026 Stream *stream, 1027 bool &pop_process_io_handler) 1028 { 1029 const bool handle_pop = pop_process_io_handler == true; 1030 1031 pop_process_io_handler = false; 1032 ProcessSP process_sp = Process::ProcessEventData::GetProcessFromEvent(event_sp.get()); 1033 1034 if (!process_sp) 1035 return false; 1036 1037 StateType event_state = Process::ProcessEventData::GetStateFromEvent (event_sp.get()); 1038 if (event_state == eStateInvalid) 1039 return false; 1040 1041 switch (event_state) 1042 { 1043 case eStateInvalid: 1044 case eStateUnloaded: 1045 case eStateConnected: 1046 case eStateAttaching: 1047 case eStateLaunching: 1048 case eStateStepping: 1049 case eStateDetached: 1050 { 1051 if (stream) 1052 stream->Printf ("Process %" PRIu64 " %s\n", 1053 process_sp->GetID(), 1054 StateAsCString (event_state)); 1055 1056 if (event_state == eStateDetached) 1057 pop_process_io_handler = true; 1058 } 1059 break; 1060 1061 case eStateRunning: 1062 // Don't be chatty when we run... 1063 break; 1064 1065 case eStateExited: 1066 if (stream) 1067 process_sp->GetStatus(*stream); 1068 pop_process_io_handler = true; 1069 break; 1070 1071 case eStateStopped: 1072 case eStateCrashed: 1073 case eStateSuspended: 1074 // Make sure the program hasn't been auto-restarted: 1075 if (Process::ProcessEventData::GetRestartedFromEvent (event_sp.get())) 1076 { 1077 if (stream) 1078 { 1079 size_t num_reasons = Process::ProcessEventData::GetNumRestartedReasons(event_sp.get()); 1080 if (num_reasons > 0) 1081 { 1082 // FIXME: Do we want to report this, or would that just be annoyingly chatty? 1083 if (num_reasons == 1) 1084 { 1085 const char *reason = Process::ProcessEventData::GetRestartedReasonAtIndex (event_sp.get(), 0); 1086 stream->Printf ("Process %" PRIu64 " stopped and restarted: %s\n", 1087 process_sp->GetID(), 1088 reason ? reason : "<UNKNOWN REASON>"); 1089 } 1090 else 1091 { 1092 stream->Printf ("Process %" PRIu64 " stopped and restarted, reasons:\n", 1093 process_sp->GetID()); 1094 1095 1096 for (size_t i = 0; i < num_reasons; i++) 1097 { 1098 const char *reason = Process::ProcessEventData::GetRestartedReasonAtIndex (event_sp.get(), i); 1099 stream->Printf("\t%s\n", reason ? reason : "<UNKNOWN REASON>"); 1100 } 1101 } 1102 } 1103 } 1104 } 1105 else 1106 { 1107 // Lock the thread list so it doesn't change on us, this is the scope for the locker: 1108 { 1109 ThreadList &thread_list = process_sp->GetThreadList(); 1110 Mutex::Locker locker (thread_list.GetMutex()); 1111 1112 ThreadSP curr_thread (thread_list.GetSelectedThread()); 1113 ThreadSP thread; 1114 StopReason curr_thread_stop_reason = eStopReasonInvalid; 1115 if (curr_thread) 1116 curr_thread_stop_reason = curr_thread->GetStopReason(); 1117 if (!curr_thread || 1118 !curr_thread->IsValid() || 1119 curr_thread_stop_reason == eStopReasonInvalid || 1120 curr_thread_stop_reason == eStopReasonNone) 1121 { 1122 // Prefer a thread that has just completed its plan over another thread as current thread. 1123 ThreadSP plan_thread; 1124 ThreadSP other_thread; 1125 const size_t num_threads = thread_list.GetSize(); 1126 size_t i; 1127 for (i = 0; i < num_threads; ++i) 1128 { 1129 thread = thread_list.GetThreadAtIndex(i); 1130 StopReason thread_stop_reason = thread->GetStopReason(); 1131 switch (thread_stop_reason) 1132 { 1133 case eStopReasonInvalid: 1134 case eStopReasonNone: 1135 break; 1136 1137 case eStopReasonTrace: 1138 case eStopReasonBreakpoint: 1139 case eStopReasonWatchpoint: 1140 case eStopReasonSignal: 1141 case eStopReasonException: 1142 case eStopReasonExec: 1143 case eStopReasonThreadExiting: 1144 case eStopReasonInstrumentation: 1145 if (!other_thread) 1146 other_thread = thread; 1147 break; 1148 case eStopReasonPlanComplete: 1149 if (!plan_thread) 1150 plan_thread = thread; 1151 break; 1152 } 1153 } 1154 if (plan_thread) 1155 thread_list.SetSelectedThreadByID (plan_thread->GetID()); 1156 else if (other_thread) 1157 thread_list.SetSelectedThreadByID (other_thread->GetID()); 1158 else 1159 { 1160 if (curr_thread && curr_thread->IsValid()) 1161 thread = curr_thread; 1162 else 1163 thread = thread_list.GetThreadAtIndex(0); 1164 1165 if (thread) 1166 thread_list.SetSelectedThreadByID (thread->GetID()); 1167 } 1168 } 1169 } 1170 // Drop the ThreadList mutex by here, since GetThreadStatus below might have to run code, 1171 // e.g. for Data formatters, and if we hold the ThreadList mutex, then the process is going to 1172 // have a hard time restarting the process. 1173 if (stream) 1174 { 1175 Debugger &debugger = process_sp->GetTarget().GetDebugger(); 1176 if (debugger.GetTargetList().GetSelectedTarget().get() == &process_sp->GetTarget()) 1177 { 1178 const bool only_threads_with_stop_reason = true; 1179 const uint32_t start_frame = 0; 1180 const uint32_t num_frames = 1; 1181 const uint32_t num_frames_with_source = 1; 1182 process_sp->GetStatus(*stream); 1183 process_sp->GetThreadStatus (*stream, 1184 only_threads_with_stop_reason, 1185 start_frame, 1186 num_frames, 1187 num_frames_with_source); 1188 } 1189 else 1190 { 1191 uint32_t target_idx = debugger.GetTargetList().GetIndexOfTarget(process_sp->GetTarget().shared_from_this()); 1192 if (target_idx != UINT32_MAX) 1193 stream->Printf ("Target %d: (", target_idx); 1194 else 1195 stream->Printf ("Target <unknown index>: ("); 1196 process_sp->GetTarget().Dump (stream, eDescriptionLevelBrief); 1197 stream->Printf (") stopped.\n"); 1198 } 1199 } 1200 1201 // Pop the process IO handler 1202 pop_process_io_handler = true; 1203 } 1204 break; 1205 } 1206 1207 if (handle_pop && pop_process_io_handler) 1208 process_sp->PopProcessIOHandler(); 1209 1210 return true; 1211 } 1212 1213 1214 StateType 1215 Process::WaitForState 1216 ( 1217 const TimeValue *timeout, 1218 const StateType *match_states, 1219 const uint32_t num_match_states 1220 ) 1221 { 1222 EventSP event_sp; 1223 uint32_t i; 1224 StateType state = GetState(); 1225 while (state != eStateInvalid) 1226 { 1227 // If we are exited or detached, we won't ever get back to any 1228 // other valid state... 1229 if (state == eStateDetached || state == eStateExited) 1230 return state; 1231 1232 state = WaitForStateChangedEvents (timeout, event_sp, NULL); 1233 1234 for (i=0; i<num_match_states; ++i) 1235 { 1236 if (match_states[i] == state) 1237 return state; 1238 } 1239 } 1240 return state; 1241 } 1242 1243 bool 1244 Process::HijackProcessEvents (Listener *listener) 1245 { 1246 if (listener != NULL) 1247 { 1248 return HijackBroadcaster(listener, eBroadcastBitStateChanged | eBroadcastBitInterrupt); 1249 } 1250 else 1251 return false; 1252 } 1253 1254 void 1255 Process::RestoreProcessEvents () 1256 { 1257 RestoreBroadcaster(); 1258 } 1259 1260 bool 1261 Process::HijackPrivateProcessEvents (Listener *listener) 1262 { 1263 if (listener != NULL) 1264 { 1265 return m_private_state_broadcaster.HijackBroadcaster(listener, eBroadcastBitStateChanged | eBroadcastBitInterrupt); 1266 } 1267 else 1268 return false; 1269 } 1270 1271 void 1272 Process::RestorePrivateProcessEvents () 1273 { 1274 m_private_state_broadcaster.RestoreBroadcaster(); 1275 } 1276 1277 StateType 1278 Process::WaitForStateChangedEvents (const TimeValue *timeout, EventSP &event_sp, Listener *hijack_listener) 1279 { 1280 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1281 1282 if (log) 1283 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, 1284 static_cast<const void*>(timeout)); 1285 1286 Listener *listener = hijack_listener; 1287 if (listener == NULL) 1288 listener = &m_listener; 1289 1290 StateType state = eStateInvalid; 1291 if (listener->WaitForEventForBroadcasterWithType (timeout, 1292 this, 1293 eBroadcastBitStateChanged | eBroadcastBitInterrupt, 1294 event_sp)) 1295 { 1296 if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged) 1297 state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 1298 else if (log) 1299 log->Printf ("Process::%s got no event or was interrupted.", __FUNCTION__); 1300 } 1301 1302 if (log) 1303 log->Printf ("Process::%s (timeout = %p, event_sp) => %s", 1304 __FUNCTION__, static_cast<const void*>(timeout), 1305 StateAsCString(state)); 1306 return state; 1307 } 1308 1309 Event * 1310 Process::PeekAtStateChangedEvents () 1311 { 1312 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1313 1314 if (log) 1315 log->Printf ("Process::%s...", __FUNCTION__); 1316 1317 Event *event_ptr; 1318 event_ptr = m_listener.PeekAtNextEventForBroadcasterWithType (this, 1319 eBroadcastBitStateChanged); 1320 if (log) 1321 { 1322 if (event_ptr) 1323 { 1324 log->Printf ("Process::%s (event_ptr) => %s", 1325 __FUNCTION__, 1326 StateAsCString(ProcessEventData::GetStateFromEvent (event_ptr))); 1327 } 1328 else 1329 { 1330 log->Printf ("Process::%s no events found", 1331 __FUNCTION__); 1332 } 1333 } 1334 return event_ptr; 1335 } 1336 1337 StateType 1338 Process::WaitForStateChangedEventsPrivate (const TimeValue *timeout, EventSP &event_sp) 1339 { 1340 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1341 1342 if (log) 1343 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, 1344 static_cast<const void*>(timeout)); 1345 1346 StateType state = eStateInvalid; 1347 if (m_private_state_listener.WaitForEventForBroadcasterWithType (timeout, 1348 &m_private_state_broadcaster, 1349 eBroadcastBitStateChanged | eBroadcastBitInterrupt, 1350 event_sp)) 1351 if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged) 1352 state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 1353 1354 // This is a bit of a hack, but when we wait here we could very well return 1355 // to the command-line, and that could disable the log, which would render the 1356 // log we got above invalid. 1357 if (log) 1358 log->Printf ("Process::%s (timeout = %p, event_sp) => %s", 1359 __FUNCTION__, static_cast<const void *>(timeout), 1360 state == eStateInvalid ? "TIMEOUT" : StateAsCString(state)); 1361 return state; 1362 } 1363 1364 bool 1365 Process::WaitForEventsPrivate (const TimeValue *timeout, EventSP &event_sp, bool control_only) 1366 { 1367 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1368 1369 if (log) 1370 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, 1371 static_cast<const void*>(timeout)); 1372 1373 if (control_only) 1374 return m_private_state_listener.WaitForEventForBroadcaster(timeout, &m_private_state_control_broadcaster, event_sp); 1375 else 1376 return m_private_state_listener.WaitForEvent(timeout, event_sp); 1377 } 1378 1379 bool 1380 Process::IsRunning () const 1381 { 1382 return StateIsRunningState (m_public_state.GetValue()); 1383 } 1384 1385 int 1386 Process::GetExitStatus () 1387 { 1388 Mutex::Locker locker (m_exit_status_mutex); 1389 1390 if (m_public_state.GetValue() == eStateExited) 1391 return m_exit_status; 1392 return -1; 1393 } 1394 1395 1396 const char * 1397 Process::GetExitDescription () 1398 { 1399 Mutex::Locker locker (m_exit_status_mutex); 1400 1401 if (m_public_state.GetValue() == eStateExited && !m_exit_string.empty()) 1402 return m_exit_string.c_str(); 1403 return NULL; 1404 } 1405 1406 bool 1407 Process::SetExitStatus (int status, const char *cstr) 1408 { 1409 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1410 if (log) 1411 log->Printf("Process::SetExitStatus (status=%i (0x%8.8x), description=%s%s%s)", 1412 status, status, 1413 cstr ? "\"" : "", 1414 cstr ? cstr : "NULL", 1415 cstr ? "\"" : ""); 1416 1417 // We were already in the exited state 1418 if (m_private_state.GetValue() == eStateExited) 1419 { 1420 if (log) 1421 log->Printf("Process::SetExitStatus () ignoring exit status because state was already set to eStateExited"); 1422 return false; 1423 } 1424 1425 // use a mutex to protect the status and string during updating 1426 { 1427 Mutex::Locker locker (m_exit_status_mutex); 1428 1429 m_exit_status = status; 1430 if (cstr) 1431 m_exit_string = cstr; 1432 else 1433 m_exit_string.clear(); 1434 } 1435 1436 DidExit (); 1437 1438 SetPrivateState (eStateExited); 1439 return true; 1440 } 1441 1442 // This static callback can be used to watch for local child processes on 1443 // the current host. The child process exits, the process will be 1444 // found in the global target list (we want to be completely sure that the 1445 // lldb_private::Process doesn't go away before we can deliver the signal. 1446 bool 1447 Process::SetProcessExitStatus (void *callback_baton, 1448 lldb::pid_t pid, 1449 bool exited, 1450 int signo, // Zero for no signal 1451 int exit_status // Exit value of process if signal is zero 1452 ) 1453 { 1454 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 1455 if (log) 1456 log->Printf ("Process::SetProcessExitStatus (baton=%p, pid=%" PRIu64 ", exited=%i, signal=%i, exit_status=%i)\n", 1457 callback_baton, 1458 pid, 1459 exited, 1460 signo, 1461 exit_status); 1462 1463 if (exited) 1464 { 1465 TargetSP target_sp(Debugger::FindTargetWithProcessID (pid)); 1466 if (target_sp) 1467 { 1468 ProcessSP process_sp (target_sp->GetProcessSP()); 1469 if (process_sp) 1470 { 1471 const char *signal_cstr = NULL; 1472 if (signo) 1473 signal_cstr = process_sp->GetUnixSignals().GetSignalAsCString (signo); 1474 1475 process_sp->SetExitStatus (exit_status, signal_cstr); 1476 } 1477 } 1478 return true; 1479 } 1480 return false; 1481 } 1482 1483 1484 void 1485 Process::UpdateThreadListIfNeeded () 1486 { 1487 const uint32_t stop_id = GetStopID(); 1488 if (m_thread_list.GetSize(false) == 0 || stop_id != m_thread_list.GetStopID()) 1489 { 1490 const StateType state = GetPrivateState(); 1491 if (StateIsStoppedState (state, true)) 1492 { 1493 Mutex::Locker locker (m_thread_list.GetMutex ()); 1494 // m_thread_list does have its own mutex, but we need to 1495 // hold onto the mutex between the call to UpdateThreadList(...) 1496 // and the os->UpdateThreadList(...) so it doesn't change on us 1497 ThreadList &old_thread_list = m_thread_list; 1498 ThreadList real_thread_list(this); 1499 ThreadList new_thread_list(this); 1500 // Always update the thread list with the protocol specific 1501 // thread list, but only update if "true" is returned 1502 if (UpdateThreadList (m_thread_list_real, real_thread_list)) 1503 { 1504 // Don't call into the OperatingSystem to update the thread list if we are shutting down, since 1505 // that may call back into the SBAPI's, requiring the API lock which is already held by whoever is 1506 // shutting us down, causing a deadlock. 1507 if (!m_destroy_in_process) 1508 { 1509 OperatingSystem *os = GetOperatingSystem (); 1510 if (os) 1511 { 1512 // Clear any old backing threads where memory threads might have been 1513 // backed by actual threads from the lldb_private::Process subclass 1514 size_t num_old_threads = old_thread_list.GetSize(false); 1515 for (size_t i=0; i<num_old_threads; ++i) 1516 old_thread_list.GetThreadAtIndex(i, false)->ClearBackingThread(); 1517 1518 // Now let the OperatingSystem plug-in update the thread list 1519 os->UpdateThreadList (old_thread_list, // Old list full of threads created by OS plug-in 1520 real_thread_list, // The actual thread list full of threads created by each lldb_private::Process subclass 1521 new_thread_list); // The new thread list that we will show to the user that gets filled in 1522 } 1523 else 1524 { 1525 // No OS plug-in, the new thread list is the same as the real thread list 1526 new_thread_list = real_thread_list; 1527 } 1528 } 1529 1530 m_thread_list_real.Update(real_thread_list); 1531 m_thread_list.Update (new_thread_list); 1532 m_thread_list.SetStopID (stop_id); 1533 1534 if (GetLastNaturalStopID () != m_extended_thread_stop_id) 1535 { 1536 // Clear any extended threads that we may have accumulated previously 1537 m_extended_thread_list.Clear(); 1538 m_extended_thread_stop_id = GetLastNaturalStopID (); 1539 1540 m_queue_list.Clear(); 1541 m_queue_list_stop_id = GetLastNaturalStopID (); 1542 } 1543 } 1544 } 1545 } 1546 } 1547 1548 void 1549 Process::UpdateQueueListIfNeeded () 1550 { 1551 if (m_system_runtime_ap.get()) 1552 { 1553 if (m_queue_list.GetSize() == 0 || m_queue_list_stop_id != GetLastNaturalStopID()) 1554 { 1555 const StateType state = GetPrivateState(); 1556 if (StateIsStoppedState (state, true)) 1557 { 1558 m_system_runtime_ap->PopulateQueueList (m_queue_list); 1559 m_queue_list_stop_id = GetLastNaturalStopID(); 1560 } 1561 } 1562 } 1563 } 1564 1565 ThreadSP 1566 Process::CreateOSPluginThread (lldb::tid_t tid, lldb::addr_t context) 1567 { 1568 OperatingSystem *os = GetOperatingSystem (); 1569 if (os) 1570 return os->CreateThread(tid, context); 1571 return ThreadSP(); 1572 } 1573 1574 uint32_t 1575 Process::GetNextThreadIndexID (uint64_t thread_id) 1576 { 1577 return AssignIndexIDToThread(thread_id); 1578 } 1579 1580 bool 1581 Process::HasAssignedIndexIDToThread(uint64_t thread_id) 1582 { 1583 std::map<uint64_t, uint32_t>::iterator iterator = m_thread_id_to_index_id_map.find(thread_id); 1584 if (iterator == m_thread_id_to_index_id_map.end()) 1585 { 1586 return false; 1587 } 1588 else 1589 { 1590 return true; 1591 } 1592 } 1593 1594 uint32_t 1595 Process::AssignIndexIDToThread(uint64_t thread_id) 1596 { 1597 uint32_t result = 0; 1598 std::map<uint64_t, uint32_t>::iterator iterator = m_thread_id_to_index_id_map.find(thread_id); 1599 if (iterator == m_thread_id_to_index_id_map.end()) 1600 { 1601 result = ++m_thread_index_id; 1602 m_thread_id_to_index_id_map[thread_id] = result; 1603 } 1604 else 1605 { 1606 result = iterator->second; 1607 } 1608 1609 return result; 1610 } 1611 1612 StateType 1613 Process::GetState() 1614 { 1615 // If any other threads access this we will need a mutex for it 1616 return m_public_state.GetValue (); 1617 } 1618 1619 bool 1620 Process::StateChangedIsExternallyHijacked() 1621 { 1622 if (IsHijackedForEvent(eBroadcastBitStateChanged)) 1623 { 1624 if (strcmp(m_hijacking_listeners.back()->GetName(), "lldb.Process.ResumeSynchronous.hijack")) 1625 return true; 1626 } 1627 return false; 1628 } 1629 1630 void 1631 Process::SetPublicState (StateType new_state, bool restarted) 1632 { 1633 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1634 if (log) 1635 log->Printf("Process::SetPublicState (state = %s, restarted = %i)", StateAsCString(new_state), restarted); 1636 const StateType old_state = m_public_state.GetValue(); 1637 m_public_state.SetValue (new_state); 1638 1639 // On the transition from Run to Stopped, we unlock the writer end of the 1640 // run lock. The lock gets locked in Resume, which is the public API 1641 // to tell the program to run. 1642 if (!StateChangedIsExternallyHijacked()) 1643 { 1644 if (new_state == eStateDetached) 1645 { 1646 if (log) 1647 log->Printf("Process::SetPublicState (%s) -- unlocking run lock for detach", StateAsCString(new_state)); 1648 m_public_run_lock.SetStopped(); 1649 } 1650 else 1651 { 1652 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1653 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1654 if ((old_state_is_stopped != new_state_is_stopped)) 1655 { 1656 if (new_state_is_stopped && !restarted) 1657 { 1658 if (log) 1659 log->Printf("Process::SetPublicState (%s) -- unlocking run lock", StateAsCString(new_state)); 1660 m_public_run_lock.SetStopped(); 1661 } 1662 } 1663 } 1664 } 1665 } 1666 1667 Error 1668 Process::Resume () 1669 { 1670 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1671 if (log) 1672 log->Printf("Process::Resume -- locking run lock"); 1673 if (!m_public_run_lock.TrySetRunning()) 1674 { 1675 Error error("Resume request failed - process still running."); 1676 if (log) 1677 log->Printf ("Process::Resume: -- TrySetRunning failed, not resuming."); 1678 return error; 1679 } 1680 return PrivateResume(); 1681 } 1682 1683 Error 1684 Process::ResumeSynchronous (Stream *stream) 1685 { 1686 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1687 if (log) 1688 log->Printf("Process::ResumeSynchronous -- locking run lock"); 1689 if (!m_public_run_lock.TrySetRunning()) 1690 { 1691 Error error("Resume request failed - process still running."); 1692 if (log) 1693 log->Printf ("Process::Resume: -- TrySetRunning failed, not resuming."); 1694 return error; 1695 } 1696 1697 ListenerSP listener_sp (new Listener("lldb.Process.ResumeSynchronous.hijack")); 1698 HijackProcessEvents(listener_sp.get()); 1699 1700 Error error = PrivateResume(); 1701 1702 StateType state = WaitForProcessToStop (NULL, NULL, true, listener_sp.get(), stream); 1703 1704 // Undo the hijacking of process events... 1705 RestoreProcessEvents(); 1706 1707 if (error.Success() && !StateIsStoppedState(state, false)) 1708 error.SetErrorStringWithFormat("process not in stopped state after synchronous resume: %s", StateAsCString(state)); 1709 1710 return error; 1711 } 1712 1713 StateType 1714 Process::GetPrivateState () 1715 { 1716 return m_private_state.GetValue(); 1717 } 1718 1719 void 1720 Process::SetPrivateState (StateType new_state) 1721 { 1722 if (m_finalize_called) 1723 return; 1724 1725 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1726 bool state_changed = false; 1727 1728 if (log) 1729 log->Printf("Process::SetPrivateState (%s)", StateAsCString(new_state)); 1730 1731 Mutex::Locker thread_locker(m_thread_list.GetMutex()); 1732 Mutex::Locker locker(m_private_state.GetMutex()); 1733 1734 const StateType old_state = m_private_state.GetValueNoLock (); 1735 state_changed = old_state != new_state; 1736 1737 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1738 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1739 if (old_state_is_stopped != new_state_is_stopped) 1740 { 1741 if (new_state_is_stopped) 1742 m_private_run_lock.SetStopped(); 1743 else 1744 m_private_run_lock.SetRunning(); 1745 } 1746 1747 if (state_changed) 1748 { 1749 m_private_state.SetValueNoLock (new_state); 1750 if (StateIsStoppedState(new_state, false)) 1751 { 1752 // Note, this currently assumes that all threads in the list 1753 // stop when the process stops. In the future we will want to 1754 // support a debugging model where some threads continue to run 1755 // while others are stopped. When that happens we will either need 1756 // a way for the thread list to identify which threads are stopping 1757 // or create a special thread list containing only threads which 1758 // actually stopped. 1759 // 1760 // The process plugin is responsible for managing the actual 1761 // behavior of the threads and should have stopped any threads 1762 // that are going to stop before we get here. 1763 m_thread_list.DidStop(); 1764 1765 m_mod_id.BumpStopID(); 1766 m_memory_cache.Clear(); 1767 if (log) 1768 log->Printf("Process::SetPrivateState (%s) stop_id = %u", StateAsCString(new_state), m_mod_id.GetStopID()); 1769 } 1770 // Use our target to get a shared pointer to ourselves... 1771 if (m_finalize_called && PrivateStateThreadIsValid() == false) 1772 BroadcastEvent (eBroadcastBitStateChanged, new ProcessEventData (shared_from_this(), new_state)); 1773 else 1774 m_private_state_broadcaster.BroadcastEvent (eBroadcastBitStateChanged, new ProcessEventData (shared_from_this(), new_state)); 1775 } 1776 else 1777 { 1778 if (log) 1779 log->Printf("Process::SetPrivateState (%s) state didn't change. Ignoring...", StateAsCString(new_state)); 1780 } 1781 } 1782 1783 void 1784 Process::SetRunningUserExpression (bool on) 1785 { 1786 m_mod_id.SetRunningUserExpression (on); 1787 } 1788 1789 addr_t 1790 Process::GetImageInfoAddress() 1791 { 1792 return LLDB_INVALID_ADDRESS; 1793 } 1794 1795 //---------------------------------------------------------------------- 1796 // LoadImage 1797 // 1798 // This function provides a default implementation that works for most 1799 // unix variants. Any Process subclasses that need to do shared library 1800 // loading differently should override LoadImage and UnloadImage and 1801 // do what is needed. 1802 //---------------------------------------------------------------------- 1803 uint32_t 1804 Process::LoadImage (const FileSpec &image_spec, Error &error) 1805 { 1806 char path[PATH_MAX]; 1807 image_spec.GetPath(path, sizeof(path)); 1808 1809 DynamicLoader *loader = GetDynamicLoader(); 1810 if (loader) 1811 { 1812 error = loader->CanLoadImage(); 1813 if (error.Fail()) 1814 return LLDB_INVALID_IMAGE_TOKEN; 1815 } 1816 1817 if (error.Success()) 1818 { 1819 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 1820 1821 if (thread_sp) 1822 { 1823 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 1824 1825 if (frame_sp) 1826 { 1827 ExecutionContext exe_ctx; 1828 frame_sp->CalculateExecutionContext (exe_ctx); 1829 EvaluateExpressionOptions expr_options; 1830 expr_options.SetUnwindOnError(true); 1831 expr_options.SetIgnoreBreakpoints(true); 1832 expr_options.SetExecutionPolicy(eExecutionPolicyAlways); 1833 expr_options.SetResultIsInternal(true); 1834 1835 StreamString expr; 1836 expr.Printf(R"( 1837 struct __lldb_dlopen_result { void *image_ptr; const char *error_str; } the_result; 1838 the_result.image_ptr = dlopen ("%s", 2); 1839 if (the_result.image_ptr == (void *) 0x0) 1840 { 1841 the_result.error_str = dlerror(); 1842 } 1843 else 1844 { 1845 the_result.error_str = (const char *) 0x0; 1846 } 1847 the_result; 1848 )", 1849 path); 1850 const char *prefix = R"( 1851 extern "C" void* dlopen (const char *path, int mode); 1852 extern "C" const char *dlerror (void); 1853 )"; 1854 lldb::ValueObjectSP result_valobj_sp; 1855 Error expr_error; 1856 ClangUserExpression::Evaluate (exe_ctx, 1857 expr_options, 1858 expr.GetData(), 1859 prefix, 1860 result_valobj_sp, 1861 expr_error); 1862 if (expr_error.Success()) 1863 { 1864 error = result_valobj_sp->GetError(); 1865 if (error.Success()) 1866 { 1867 Scalar scalar; 1868 ValueObjectSP image_ptr_sp = result_valobj_sp->GetChildAtIndex(0, true); 1869 if (image_ptr_sp && image_ptr_sp->ResolveValue (scalar)) 1870 { 1871 addr_t image_ptr = scalar.ULongLong(LLDB_INVALID_ADDRESS); 1872 if (image_ptr != 0 && image_ptr != LLDB_INVALID_ADDRESS) 1873 { 1874 uint32_t image_token = m_image_tokens.size(); 1875 m_image_tokens.push_back (image_ptr); 1876 return image_token; 1877 } 1878 else if (image_ptr == 0) 1879 { 1880 ValueObjectSP error_str_sp = result_valobj_sp->GetChildAtIndex(1, true); 1881 if (error_str_sp) 1882 { 1883 if (error_str_sp->IsCStringContainer(true)) 1884 { 1885 DataBufferSP buffer_sp(new DataBufferHeap(10240,0)); 1886 size_t num_chars = error_str_sp->ReadPointedString (buffer_sp, error, 10240); 1887 if (error.Success() && num_chars > 0) 1888 { 1889 error.Clear(); 1890 error.SetErrorStringWithFormat("dlopen error: %s", buffer_sp->GetBytes()); 1891 } 1892 else 1893 { 1894 error.Clear(); 1895 error.SetErrorStringWithFormat("dlopen failed for unknown reasons."); 1896 } 1897 } 1898 } 1899 } 1900 } 1901 } 1902 } 1903 else 1904 error = expr_error; 1905 } 1906 } 1907 } 1908 if (!error.AsCString()) 1909 error.SetErrorStringWithFormat("unable to load '%s'", path); 1910 return LLDB_INVALID_IMAGE_TOKEN; 1911 } 1912 1913 //---------------------------------------------------------------------- 1914 // UnloadImage 1915 // 1916 // This function provides a default implementation that works for most 1917 // unix variants. Any Process subclasses that need to do shared library 1918 // loading differently should override LoadImage and UnloadImage and 1919 // do what is needed. 1920 //---------------------------------------------------------------------- 1921 Error 1922 Process::UnloadImage (uint32_t image_token) 1923 { 1924 Error error; 1925 if (image_token < m_image_tokens.size()) 1926 { 1927 const addr_t image_addr = m_image_tokens[image_token]; 1928 if (image_addr == LLDB_INVALID_ADDRESS) 1929 { 1930 error.SetErrorString("image already unloaded"); 1931 } 1932 else 1933 { 1934 DynamicLoader *loader = GetDynamicLoader(); 1935 if (loader) 1936 error = loader->CanLoadImage(); 1937 1938 if (error.Success()) 1939 { 1940 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 1941 1942 if (thread_sp) 1943 { 1944 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 1945 1946 if (frame_sp) 1947 { 1948 ExecutionContext exe_ctx; 1949 frame_sp->CalculateExecutionContext (exe_ctx); 1950 EvaluateExpressionOptions expr_options; 1951 expr_options.SetUnwindOnError(true); 1952 expr_options.SetIgnoreBreakpoints(true); 1953 expr_options.SetExecutionPolicy(eExecutionPolicyAlways); 1954 StreamString expr; 1955 expr.Printf("dlclose ((void *)0x%" PRIx64 ")", image_addr); 1956 const char *prefix = "extern \"C\" int dlclose(void* handle);\n"; 1957 lldb::ValueObjectSP result_valobj_sp; 1958 Error expr_error; 1959 ClangUserExpression::Evaluate (exe_ctx, 1960 expr_options, 1961 expr.GetData(), 1962 prefix, 1963 result_valobj_sp, 1964 expr_error); 1965 if (result_valobj_sp->GetError().Success()) 1966 { 1967 Scalar scalar; 1968 if (result_valobj_sp->ResolveValue (scalar)) 1969 { 1970 if (scalar.UInt(1)) 1971 { 1972 error.SetErrorStringWithFormat("expression failed: \"%s\"", expr.GetData()); 1973 } 1974 else 1975 { 1976 m_image_tokens[image_token] = LLDB_INVALID_ADDRESS; 1977 } 1978 } 1979 } 1980 else 1981 { 1982 error = result_valobj_sp->GetError(); 1983 } 1984 } 1985 } 1986 } 1987 } 1988 } 1989 else 1990 { 1991 error.SetErrorString("invalid image token"); 1992 } 1993 return error; 1994 } 1995 1996 const lldb::ABISP & 1997 Process::GetABI() 1998 { 1999 if (!m_abi_sp) 2000 m_abi_sp = ABI::FindPlugin(m_target.GetArchitecture()); 2001 return m_abi_sp; 2002 } 2003 2004 LanguageRuntime * 2005 Process::GetLanguageRuntime(lldb::LanguageType language, bool retry_if_null) 2006 { 2007 LanguageRuntimeCollection::iterator pos; 2008 pos = m_language_runtimes.find (language); 2009 if (pos == m_language_runtimes.end() || (retry_if_null && !(*pos).second)) 2010 { 2011 lldb::LanguageRuntimeSP runtime_sp(LanguageRuntime::FindPlugin(this, language)); 2012 2013 m_language_runtimes[language] = runtime_sp; 2014 return runtime_sp.get(); 2015 } 2016 else 2017 return (*pos).second.get(); 2018 } 2019 2020 CPPLanguageRuntime * 2021 Process::GetCPPLanguageRuntime (bool retry_if_null) 2022 { 2023 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeC_plus_plus, retry_if_null); 2024 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeC_plus_plus) 2025 return static_cast<CPPLanguageRuntime *> (runtime); 2026 return NULL; 2027 } 2028 2029 ObjCLanguageRuntime * 2030 Process::GetObjCLanguageRuntime (bool retry_if_null) 2031 { 2032 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeObjC, retry_if_null); 2033 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeObjC) 2034 return static_cast<ObjCLanguageRuntime *> (runtime); 2035 return NULL; 2036 } 2037 2038 bool 2039 Process::IsPossibleDynamicValue (ValueObject& in_value) 2040 { 2041 if (in_value.IsDynamic()) 2042 return false; 2043 LanguageType known_type = in_value.GetObjectRuntimeLanguage(); 2044 2045 if (known_type != eLanguageTypeUnknown && known_type != eLanguageTypeC) 2046 { 2047 LanguageRuntime *runtime = GetLanguageRuntime (known_type); 2048 return runtime ? runtime->CouldHaveDynamicValue(in_value) : false; 2049 } 2050 2051 LanguageRuntime *cpp_runtime = GetLanguageRuntime (eLanguageTypeC_plus_plus); 2052 if (cpp_runtime && cpp_runtime->CouldHaveDynamicValue(in_value)) 2053 return true; 2054 2055 LanguageRuntime *objc_runtime = GetLanguageRuntime (eLanguageTypeObjC); 2056 return objc_runtime ? objc_runtime->CouldHaveDynamicValue(in_value) : false; 2057 } 2058 2059 BreakpointSiteList & 2060 Process::GetBreakpointSiteList() 2061 { 2062 return m_breakpoint_site_list; 2063 } 2064 2065 const BreakpointSiteList & 2066 Process::GetBreakpointSiteList() const 2067 { 2068 return m_breakpoint_site_list; 2069 } 2070 2071 2072 void 2073 Process::DisableAllBreakpointSites () 2074 { 2075 m_breakpoint_site_list.ForEach([this](BreakpointSite *bp_site) -> void { 2076 // bp_site->SetEnabled(true); 2077 DisableBreakpointSite(bp_site); 2078 }); 2079 } 2080 2081 Error 2082 Process::ClearBreakpointSiteByID (lldb::user_id_t break_id) 2083 { 2084 Error error (DisableBreakpointSiteByID (break_id)); 2085 2086 if (error.Success()) 2087 m_breakpoint_site_list.Remove(break_id); 2088 2089 return error; 2090 } 2091 2092 Error 2093 Process::DisableBreakpointSiteByID (lldb::user_id_t break_id) 2094 { 2095 Error error; 2096 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2097 if (bp_site_sp) 2098 { 2099 if (bp_site_sp->IsEnabled()) 2100 error = DisableBreakpointSite (bp_site_sp.get()); 2101 } 2102 else 2103 { 2104 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2105 } 2106 2107 return error; 2108 } 2109 2110 Error 2111 Process::EnableBreakpointSiteByID (lldb::user_id_t break_id) 2112 { 2113 Error error; 2114 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2115 if (bp_site_sp) 2116 { 2117 if (!bp_site_sp->IsEnabled()) 2118 error = EnableBreakpointSite (bp_site_sp.get()); 2119 } 2120 else 2121 { 2122 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2123 } 2124 return error; 2125 } 2126 2127 lldb::break_id_t 2128 Process::CreateBreakpointSite (const BreakpointLocationSP &owner, bool use_hardware) 2129 { 2130 addr_t load_addr = LLDB_INVALID_ADDRESS; 2131 2132 bool show_error = true; 2133 switch (GetState()) 2134 { 2135 case eStateInvalid: 2136 case eStateUnloaded: 2137 case eStateConnected: 2138 case eStateAttaching: 2139 case eStateLaunching: 2140 case eStateDetached: 2141 case eStateExited: 2142 show_error = false; 2143 break; 2144 2145 case eStateStopped: 2146 case eStateRunning: 2147 case eStateStepping: 2148 case eStateCrashed: 2149 case eStateSuspended: 2150 show_error = IsAlive(); 2151 break; 2152 } 2153 2154 // Reset the IsIndirect flag here, in case the location changes from 2155 // pointing to a indirect symbol to a regular symbol. 2156 owner->SetIsIndirect (false); 2157 2158 if (owner->ShouldResolveIndirectFunctions()) 2159 { 2160 Symbol *symbol = owner->GetAddress().CalculateSymbolContextSymbol(); 2161 if (symbol && symbol->IsIndirect()) 2162 { 2163 Error error; 2164 load_addr = ResolveIndirectFunction (&symbol->GetAddress(), error); 2165 if (!error.Success() && show_error) 2166 { 2167 m_target.GetDebugger().GetErrorFile()->Printf ("warning: failed to resolve indirect function at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2168 symbol->GetAddress().GetLoadAddress(&m_target), 2169 owner->GetBreakpoint().GetID(), 2170 owner->GetID(), 2171 error.AsCString() ? error.AsCString() : "unknown error"); 2172 return LLDB_INVALID_BREAK_ID; 2173 } 2174 Address resolved_address(load_addr); 2175 load_addr = resolved_address.GetOpcodeLoadAddress (&m_target); 2176 owner->SetIsIndirect(true); 2177 } 2178 else 2179 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&m_target); 2180 } 2181 else 2182 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&m_target); 2183 2184 if (load_addr != LLDB_INVALID_ADDRESS) 2185 { 2186 BreakpointSiteSP bp_site_sp; 2187 2188 // Look up this breakpoint site. If it exists, then add this new owner, otherwise 2189 // create a new breakpoint site and add it. 2190 2191 bp_site_sp = m_breakpoint_site_list.FindByAddress (load_addr); 2192 2193 if (bp_site_sp) 2194 { 2195 bp_site_sp->AddOwner (owner); 2196 owner->SetBreakpointSite (bp_site_sp); 2197 return bp_site_sp->GetID(); 2198 } 2199 else 2200 { 2201 bp_site_sp.reset (new BreakpointSite (&m_breakpoint_site_list, owner, load_addr, use_hardware)); 2202 if (bp_site_sp) 2203 { 2204 Error error = EnableBreakpointSite (bp_site_sp.get()); 2205 if (error.Success()) 2206 { 2207 owner->SetBreakpointSite (bp_site_sp); 2208 return m_breakpoint_site_list.Add (bp_site_sp); 2209 } 2210 else 2211 { 2212 if (show_error) 2213 { 2214 // Report error for setting breakpoint... 2215 m_target.GetDebugger().GetErrorFile()->Printf ("warning: failed to set breakpoint site at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2216 load_addr, 2217 owner->GetBreakpoint().GetID(), 2218 owner->GetID(), 2219 error.AsCString() ? error.AsCString() : "unknown error"); 2220 } 2221 } 2222 } 2223 } 2224 } 2225 // We failed to enable the breakpoint 2226 return LLDB_INVALID_BREAK_ID; 2227 2228 } 2229 2230 void 2231 Process::RemoveOwnerFromBreakpointSite (lldb::user_id_t owner_id, lldb::user_id_t owner_loc_id, BreakpointSiteSP &bp_site_sp) 2232 { 2233 uint32_t num_owners = bp_site_sp->RemoveOwner (owner_id, owner_loc_id); 2234 if (num_owners == 0) 2235 { 2236 // Don't try to disable the site if we don't have a live process anymore. 2237 if (IsAlive()) 2238 DisableBreakpointSite (bp_site_sp.get()); 2239 m_breakpoint_site_list.RemoveByAddress(bp_site_sp->GetLoadAddress()); 2240 } 2241 } 2242 2243 2244 size_t 2245 Process::RemoveBreakpointOpcodesFromBuffer (addr_t bp_addr, size_t size, uint8_t *buf) const 2246 { 2247 size_t bytes_removed = 0; 2248 BreakpointSiteList bp_sites_in_range; 2249 2250 if (m_breakpoint_site_list.FindInRange (bp_addr, bp_addr + size, bp_sites_in_range)) 2251 { 2252 bp_sites_in_range.ForEach([bp_addr, size, buf, &bytes_removed](BreakpointSite *bp_site) -> void { 2253 if (bp_site->GetType() == BreakpointSite::eSoftware) 2254 { 2255 addr_t intersect_addr; 2256 size_t intersect_size; 2257 size_t opcode_offset; 2258 if (bp_site->IntersectsRange(bp_addr, size, &intersect_addr, &intersect_size, &opcode_offset)) 2259 { 2260 assert(bp_addr <= intersect_addr && intersect_addr < bp_addr + size); 2261 assert(bp_addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= bp_addr + size); 2262 assert(opcode_offset + intersect_size <= bp_site->GetByteSize()); 2263 size_t buf_offset = intersect_addr - bp_addr; 2264 ::memcpy(buf + buf_offset, bp_site->GetSavedOpcodeBytes() + opcode_offset, intersect_size); 2265 } 2266 } 2267 }); 2268 } 2269 return bytes_removed; 2270 } 2271 2272 2273 2274 size_t 2275 Process::GetSoftwareBreakpointTrapOpcode (BreakpointSite* bp_site) 2276 { 2277 PlatformSP platform_sp (m_target.GetPlatform()); 2278 if (platform_sp) 2279 return platform_sp->GetSoftwareBreakpointTrapOpcode (m_target, bp_site); 2280 return 0; 2281 } 2282 2283 Error 2284 Process::EnableSoftwareBreakpoint (BreakpointSite *bp_site) 2285 { 2286 Error error; 2287 assert (bp_site != NULL); 2288 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2289 const addr_t bp_addr = bp_site->GetLoadAddress(); 2290 if (log) 2291 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64, bp_site->GetID(), (uint64_t)bp_addr); 2292 if (bp_site->IsEnabled()) 2293 { 2294 if (log) 2295 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already enabled", bp_site->GetID(), (uint64_t)bp_addr); 2296 return error; 2297 } 2298 2299 if (bp_addr == LLDB_INVALID_ADDRESS) 2300 { 2301 error.SetErrorString("BreakpointSite contains an invalid load address."); 2302 return error; 2303 } 2304 // Ask the lldb::Process subclass to fill in the correct software breakpoint 2305 // trap for the breakpoint site 2306 const size_t bp_opcode_size = GetSoftwareBreakpointTrapOpcode(bp_site); 2307 2308 if (bp_opcode_size == 0) 2309 { 2310 error.SetErrorStringWithFormat ("Process::GetSoftwareBreakpointTrapOpcode() returned zero, unable to get breakpoint trap for address 0x%" PRIx64, bp_addr); 2311 } 2312 else 2313 { 2314 const uint8_t * const bp_opcode_bytes = bp_site->GetTrapOpcodeBytes(); 2315 2316 if (bp_opcode_bytes == NULL) 2317 { 2318 error.SetErrorString ("BreakpointSite doesn't contain a valid breakpoint trap opcode."); 2319 return error; 2320 } 2321 2322 // Save the original opcode by reading it 2323 if (DoReadMemory(bp_addr, bp_site->GetSavedOpcodeBytes(), bp_opcode_size, error) == bp_opcode_size) 2324 { 2325 // Write a software breakpoint in place of the original opcode 2326 if (DoWriteMemory(bp_addr, bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2327 { 2328 uint8_t verify_bp_opcode_bytes[64]; 2329 if (DoReadMemory(bp_addr, verify_bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2330 { 2331 if (::memcmp(bp_opcode_bytes, verify_bp_opcode_bytes, bp_opcode_size) == 0) 2332 { 2333 bp_site->SetEnabled(true); 2334 bp_site->SetType (BreakpointSite::eSoftware); 2335 if (log) 2336 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", 2337 bp_site->GetID(), 2338 (uint64_t)bp_addr); 2339 } 2340 else 2341 error.SetErrorString("failed to verify the breakpoint trap in memory."); 2342 } 2343 else 2344 error.SetErrorString("Unable to read memory to verify breakpoint trap."); 2345 } 2346 else 2347 error.SetErrorString("Unable to write breakpoint trap to memory."); 2348 } 2349 else 2350 error.SetErrorString("Unable to read memory at breakpoint address."); 2351 } 2352 if (log && error.Fail()) 2353 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2354 bp_site->GetID(), 2355 (uint64_t)bp_addr, 2356 error.AsCString()); 2357 return error; 2358 } 2359 2360 Error 2361 Process::DisableSoftwareBreakpoint (BreakpointSite *bp_site) 2362 { 2363 Error error; 2364 assert (bp_site != NULL); 2365 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2366 addr_t bp_addr = bp_site->GetLoadAddress(); 2367 lldb::user_id_t breakID = bp_site->GetID(); 2368 if (log) 2369 log->Printf ("Process::DisableSoftwareBreakpoint (breakID = %" PRIu64 ") addr = 0x%" PRIx64, breakID, (uint64_t)bp_addr); 2370 2371 if (bp_site->IsHardware()) 2372 { 2373 error.SetErrorString("Breakpoint site is a hardware breakpoint."); 2374 } 2375 else if (bp_site->IsEnabled()) 2376 { 2377 const size_t break_op_size = bp_site->GetByteSize(); 2378 const uint8_t * const break_op = bp_site->GetTrapOpcodeBytes(); 2379 if (break_op_size > 0) 2380 { 2381 // Clear a software breakpoint instruction 2382 uint8_t curr_break_op[8]; 2383 assert (break_op_size <= sizeof(curr_break_op)); 2384 bool break_op_found = false; 2385 2386 // Read the breakpoint opcode 2387 if (DoReadMemory (bp_addr, curr_break_op, break_op_size, error) == break_op_size) 2388 { 2389 bool verify = false; 2390 // Make sure we have the a breakpoint opcode exists at this address 2391 if (::memcmp (curr_break_op, break_op, break_op_size) == 0) 2392 { 2393 break_op_found = true; 2394 // We found a valid breakpoint opcode at this address, now restore 2395 // the saved opcode. 2396 if (DoWriteMemory (bp_addr, bp_site->GetSavedOpcodeBytes(), break_op_size, error) == break_op_size) 2397 { 2398 verify = true; 2399 } 2400 else 2401 error.SetErrorString("Memory write failed when restoring original opcode."); 2402 } 2403 else 2404 { 2405 error.SetErrorString("Original breakpoint trap is no longer in memory."); 2406 // Set verify to true and so we can check if the original opcode has already been restored 2407 verify = true; 2408 } 2409 2410 if (verify) 2411 { 2412 uint8_t verify_opcode[8]; 2413 assert (break_op_size < sizeof(verify_opcode)); 2414 // Verify that our original opcode made it back to the inferior 2415 if (DoReadMemory (bp_addr, verify_opcode, break_op_size, error) == break_op_size) 2416 { 2417 // compare the memory we just read with the original opcode 2418 if (::memcmp (bp_site->GetSavedOpcodeBytes(), verify_opcode, break_op_size) == 0) 2419 { 2420 // SUCCESS 2421 bp_site->SetEnabled(false); 2422 if (log) 2423 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", bp_site->GetID(), (uint64_t)bp_addr); 2424 return error; 2425 } 2426 else 2427 { 2428 if (break_op_found) 2429 error.SetErrorString("Failed to restore original opcode."); 2430 } 2431 } 2432 else 2433 error.SetErrorString("Failed to read memory to verify that breakpoint trap was restored."); 2434 } 2435 } 2436 else 2437 error.SetErrorString("Unable to read memory that should contain the breakpoint trap."); 2438 } 2439 } 2440 else 2441 { 2442 if (log) 2443 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already disabled", bp_site->GetID(), (uint64_t)bp_addr); 2444 return error; 2445 } 2446 2447 if (log) 2448 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2449 bp_site->GetID(), 2450 (uint64_t)bp_addr, 2451 error.AsCString()); 2452 return error; 2453 2454 } 2455 2456 // Uncomment to verify memory caching works after making changes to caching code 2457 //#define VERIFY_MEMORY_READS 2458 2459 size_t 2460 Process::ReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2461 { 2462 error.Clear(); 2463 if (!GetDisableMemoryCache()) 2464 { 2465 #if defined (VERIFY_MEMORY_READS) 2466 // Memory caching is enabled, with debug verification 2467 2468 if (buf && size) 2469 { 2470 // Uncomment the line below to make sure memory caching is working. 2471 // I ran this through the test suite and got no assertions, so I am 2472 // pretty confident this is working well. If any changes are made to 2473 // memory caching, uncomment the line below and test your changes! 2474 2475 // Verify all memory reads by using the cache first, then redundantly 2476 // reading the same memory from the inferior and comparing to make sure 2477 // everything is exactly the same. 2478 std::string verify_buf (size, '\0'); 2479 assert (verify_buf.size() == size); 2480 const size_t cache_bytes_read = m_memory_cache.Read (this, addr, buf, size, error); 2481 Error verify_error; 2482 const size_t verify_bytes_read = ReadMemoryFromInferior (addr, const_cast<char *>(verify_buf.data()), verify_buf.size(), verify_error); 2483 assert (cache_bytes_read == verify_bytes_read); 2484 assert (memcmp(buf, verify_buf.data(), verify_buf.size()) == 0); 2485 assert (verify_error.Success() == error.Success()); 2486 return cache_bytes_read; 2487 } 2488 return 0; 2489 #else // !defined(VERIFY_MEMORY_READS) 2490 // Memory caching is enabled, without debug verification 2491 2492 return m_memory_cache.Read (addr, buf, size, error); 2493 #endif // defined (VERIFY_MEMORY_READS) 2494 } 2495 else 2496 { 2497 // Memory caching is disabled 2498 2499 return ReadMemoryFromInferior (addr, buf, size, error); 2500 } 2501 } 2502 2503 size_t 2504 Process::ReadCStringFromMemory (addr_t addr, std::string &out_str, Error &error) 2505 { 2506 char buf[256]; 2507 out_str.clear(); 2508 addr_t curr_addr = addr; 2509 while (1) 2510 { 2511 size_t length = ReadCStringFromMemory (curr_addr, buf, sizeof(buf), error); 2512 if (length == 0) 2513 break; 2514 out_str.append(buf, length); 2515 // If we got "length - 1" bytes, we didn't get the whole C string, we 2516 // need to read some more characters 2517 if (length == sizeof(buf) - 1) 2518 curr_addr += length; 2519 else 2520 break; 2521 } 2522 return out_str.size(); 2523 } 2524 2525 2526 size_t 2527 Process::ReadStringFromMemory (addr_t addr, char *dst, size_t max_bytes, Error &error, 2528 size_t type_width) 2529 { 2530 size_t total_bytes_read = 0; 2531 if (dst && max_bytes && type_width && max_bytes >= type_width) 2532 { 2533 // Ensure a null terminator independent of the number of bytes that is read. 2534 memset (dst, 0, max_bytes); 2535 size_t bytes_left = max_bytes - type_width; 2536 2537 const char terminator[4] = {'\0', '\0', '\0', '\0'}; 2538 assert(sizeof(terminator) >= type_width && 2539 "Attempting to validate a string with more than 4 bytes per character!"); 2540 2541 addr_t curr_addr = addr; 2542 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2543 char *curr_dst = dst; 2544 2545 error.Clear(); 2546 while (bytes_left > 0 && error.Success()) 2547 { 2548 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2549 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2550 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2551 2552 if (bytes_read == 0) 2553 break; 2554 2555 // Search for a null terminator of correct size and alignment in bytes_read 2556 size_t aligned_start = total_bytes_read - total_bytes_read % type_width; 2557 for (size_t i = aligned_start; i + type_width <= total_bytes_read + bytes_read; i += type_width) 2558 if (::strncmp(&dst[i], terminator, type_width) == 0) 2559 { 2560 error.Clear(); 2561 return i; 2562 } 2563 2564 total_bytes_read += bytes_read; 2565 curr_dst += bytes_read; 2566 curr_addr += bytes_read; 2567 bytes_left -= bytes_read; 2568 } 2569 } 2570 else 2571 { 2572 if (max_bytes) 2573 error.SetErrorString("invalid arguments"); 2574 } 2575 return total_bytes_read; 2576 } 2577 2578 // Deprecated in favor of ReadStringFromMemory which has wchar support and correct code to find 2579 // null terminators. 2580 size_t 2581 Process::ReadCStringFromMemory (addr_t addr, char *dst, size_t dst_max_len, Error &result_error) 2582 { 2583 size_t total_cstr_len = 0; 2584 if (dst && dst_max_len) 2585 { 2586 result_error.Clear(); 2587 // NULL out everything just to be safe 2588 memset (dst, 0, dst_max_len); 2589 Error error; 2590 addr_t curr_addr = addr; 2591 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2592 size_t bytes_left = dst_max_len - 1; 2593 char *curr_dst = dst; 2594 2595 while (bytes_left > 0) 2596 { 2597 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2598 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2599 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2600 2601 if (bytes_read == 0) 2602 { 2603 result_error = error; 2604 dst[total_cstr_len] = '\0'; 2605 break; 2606 } 2607 const size_t len = strlen(curr_dst); 2608 2609 total_cstr_len += len; 2610 2611 if (len < bytes_to_read) 2612 break; 2613 2614 curr_dst += bytes_read; 2615 curr_addr += bytes_read; 2616 bytes_left -= bytes_read; 2617 } 2618 } 2619 else 2620 { 2621 if (dst == NULL) 2622 result_error.SetErrorString("invalid arguments"); 2623 else 2624 result_error.Clear(); 2625 } 2626 return total_cstr_len; 2627 } 2628 2629 size_t 2630 Process::ReadMemoryFromInferior (addr_t addr, void *buf, size_t size, Error &error) 2631 { 2632 if (buf == NULL || size == 0) 2633 return 0; 2634 2635 size_t bytes_read = 0; 2636 uint8_t *bytes = (uint8_t *)buf; 2637 2638 while (bytes_read < size) 2639 { 2640 const size_t curr_size = size - bytes_read; 2641 const size_t curr_bytes_read = DoReadMemory (addr + bytes_read, 2642 bytes + bytes_read, 2643 curr_size, 2644 error); 2645 bytes_read += curr_bytes_read; 2646 if (curr_bytes_read == curr_size || curr_bytes_read == 0) 2647 break; 2648 } 2649 2650 // Replace any software breakpoint opcodes that fall into this range back 2651 // into "buf" before we return 2652 if (bytes_read > 0) 2653 RemoveBreakpointOpcodesFromBuffer (addr, bytes_read, (uint8_t *)buf); 2654 return bytes_read; 2655 } 2656 2657 uint64_t 2658 Process::ReadUnsignedIntegerFromMemory (lldb::addr_t vm_addr, size_t integer_byte_size, uint64_t fail_value, Error &error) 2659 { 2660 Scalar scalar; 2661 if (ReadScalarIntegerFromMemory(vm_addr, integer_byte_size, false, scalar, error)) 2662 return scalar.ULongLong(fail_value); 2663 return fail_value; 2664 } 2665 2666 addr_t 2667 Process::ReadPointerFromMemory (lldb::addr_t vm_addr, Error &error) 2668 { 2669 Scalar scalar; 2670 if (ReadScalarIntegerFromMemory(vm_addr, GetAddressByteSize(), false, scalar, error)) 2671 return scalar.ULongLong(LLDB_INVALID_ADDRESS); 2672 return LLDB_INVALID_ADDRESS; 2673 } 2674 2675 2676 bool 2677 Process::WritePointerToMemory (lldb::addr_t vm_addr, 2678 lldb::addr_t ptr_value, 2679 Error &error) 2680 { 2681 Scalar scalar; 2682 const uint32_t addr_byte_size = GetAddressByteSize(); 2683 if (addr_byte_size <= 4) 2684 scalar = (uint32_t)ptr_value; 2685 else 2686 scalar = ptr_value; 2687 return WriteScalarToMemory(vm_addr, scalar, addr_byte_size, error) == addr_byte_size; 2688 } 2689 2690 size_t 2691 Process::WriteMemoryPrivate (addr_t addr, const void *buf, size_t size, Error &error) 2692 { 2693 size_t bytes_written = 0; 2694 const uint8_t *bytes = (const uint8_t *)buf; 2695 2696 while (bytes_written < size) 2697 { 2698 const size_t curr_size = size - bytes_written; 2699 const size_t curr_bytes_written = DoWriteMemory (addr + bytes_written, 2700 bytes + bytes_written, 2701 curr_size, 2702 error); 2703 bytes_written += curr_bytes_written; 2704 if (curr_bytes_written == curr_size || curr_bytes_written == 0) 2705 break; 2706 } 2707 return bytes_written; 2708 } 2709 2710 size_t 2711 Process::WriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2712 { 2713 #if defined (ENABLE_MEMORY_CACHING) 2714 m_memory_cache.Flush (addr, size); 2715 #endif 2716 2717 if (buf == NULL || size == 0) 2718 return 0; 2719 2720 m_mod_id.BumpMemoryID(); 2721 2722 // We need to write any data that would go where any current software traps 2723 // (enabled software breakpoints) any software traps (breakpoints) that we 2724 // may have placed in our tasks memory. 2725 2726 BreakpointSiteList bp_sites_in_range; 2727 2728 if (m_breakpoint_site_list.FindInRange (addr, addr + size, bp_sites_in_range)) 2729 { 2730 // No breakpoint sites overlap 2731 if (bp_sites_in_range.IsEmpty()) 2732 return WriteMemoryPrivate (addr, buf, size, error); 2733 else 2734 { 2735 const uint8_t *ubuf = (const uint8_t *)buf; 2736 uint64_t bytes_written = 0; 2737 2738 bp_sites_in_range.ForEach([this, addr, size, &bytes_written, &ubuf, &error](BreakpointSite *bp) -> void { 2739 2740 if (error.Success()) 2741 { 2742 addr_t intersect_addr; 2743 size_t intersect_size; 2744 size_t opcode_offset; 2745 const bool intersects = bp->IntersectsRange(addr, size, &intersect_addr, &intersect_size, &opcode_offset); 2746 assert(intersects); 2747 assert(addr <= intersect_addr && intersect_addr < addr + size); 2748 assert(addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= addr + size); 2749 assert(opcode_offset + intersect_size <= bp->GetByteSize()); 2750 2751 // Check for bytes before this breakpoint 2752 const addr_t curr_addr = addr + bytes_written; 2753 if (intersect_addr > curr_addr) 2754 { 2755 // There are some bytes before this breakpoint that we need to 2756 // just write to memory 2757 size_t curr_size = intersect_addr - curr_addr; 2758 size_t curr_bytes_written = WriteMemoryPrivate (curr_addr, 2759 ubuf + bytes_written, 2760 curr_size, 2761 error); 2762 bytes_written += curr_bytes_written; 2763 if (curr_bytes_written != curr_size) 2764 { 2765 // We weren't able to write all of the requested bytes, we 2766 // are done looping and will return the number of bytes that 2767 // we have written so far. 2768 if (error.Success()) 2769 error.SetErrorToGenericError(); 2770 } 2771 } 2772 // Now write any bytes that would cover up any software breakpoints 2773 // directly into the breakpoint opcode buffer 2774 ::memcpy(bp->GetSavedOpcodeBytes() + opcode_offset, ubuf + bytes_written, intersect_size); 2775 bytes_written += intersect_size; 2776 } 2777 }); 2778 2779 if (bytes_written < size) 2780 WriteMemoryPrivate (addr + bytes_written, 2781 ubuf + bytes_written, 2782 size - bytes_written, 2783 error); 2784 } 2785 } 2786 else 2787 { 2788 return WriteMemoryPrivate (addr, buf, size, error); 2789 } 2790 2791 // Write any remaining bytes after the last breakpoint if we have any left 2792 return 0; //bytes_written; 2793 } 2794 2795 size_t 2796 Process::WriteScalarToMemory (addr_t addr, const Scalar &scalar, size_t byte_size, Error &error) 2797 { 2798 if (byte_size == UINT32_MAX) 2799 byte_size = scalar.GetByteSize(); 2800 if (byte_size > 0) 2801 { 2802 uint8_t buf[32]; 2803 const size_t mem_size = scalar.GetAsMemoryData (buf, byte_size, GetByteOrder(), error); 2804 if (mem_size > 0) 2805 return WriteMemory(addr, buf, mem_size, error); 2806 else 2807 error.SetErrorString ("failed to get scalar as memory data"); 2808 } 2809 else 2810 { 2811 error.SetErrorString ("invalid scalar value"); 2812 } 2813 return 0; 2814 } 2815 2816 size_t 2817 Process::ReadScalarIntegerFromMemory (addr_t addr, 2818 uint32_t byte_size, 2819 bool is_signed, 2820 Scalar &scalar, 2821 Error &error) 2822 { 2823 uint64_t uval = 0; 2824 if (byte_size == 0) 2825 { 2826 error.SetErrorString ("byte size is zero"); 2827 } 2828 else if (byte_size & (byte_size - 1)) 2829 { 2830 error.SetErrorStringWithFormat ("byte size %u is not a power of 2", byte_size); 2831 } 2832 else if (byte_size <= sizeof(uval)) 2833 { 2834 const size_t bytes_read = ReadMemory (addr, &uval, byte_size, error); 2835 if (bytes_read == byte_size) 2836 { 2837 DataExtractor data (&uval, sizeof(uval), GetByteOrder(), GetAddressByteSize()); 2838 lldb::offset_t offset = 0; 2839 if (byte_size <= 4) 2840 scalar = data.GetMaxU32 (&offset, byte_size); 2841 else 2842 scalar = data.GetMaxU64 (&offset, byte_size); 2843 if (is_signed) 2844 scalar.SignExtend(byte_size * 8); 2845 return bytes_read; 2846 } 2847 } 2848 else 2849 { 2850 error.SetErrorStringWithFormat ("byte size of %u is too large for integer scalar type", byte_size); 2851 } 2852 return 0; 2853 } 2854 2855 #define USE_ALLOCATE_MEMORY_CACHE 1 2856 addr_t 2857 Process::AllocateMemory(size_t size, uint32_t permissions, Error &error) 2858 { 2859 if (GetPrivateState() != eStateStopped) 2860 return LLDB_INVALID_ADDRESS; 2861 2862 #if defined (USE_ALLOCATE_MEMORY_CACHE) 2863 return m_allocated_memory_cache.AllocateMemory(size, permissions, error); 2864 #else 2865 addr_t allocated_addr = DoAllocateMemory (size, permissions, error); 2866 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2867 if (log) 2868 log->Printf("Process::AllocateMemory(size=%" PRIu64 ", permissions=%s) => 0x%16.16" PRIx64 " (m_stop_id = %u m_memory_id = %u)", 2869 (uint64_t)size, 2870 GetPermissionsAsCString (permissions), 2871 (uint64_t)allocated_addr, 2872 m_mod_id.GetStopID(), 2873 m_mod_id.GetMemoryID()); 2874 return allocated_addr; 2875 #endif 2876 } 2877 2878 bool 2879 Process::CanJIT () 2880 { 2881 if (m_can_jit == eCanJITDontKnow) 2882 { 2883 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2884 Error err; 2885 2886 uint64_t allocated_memory = AllocateMemory(8, 2887 ePermissionsReadable | ePermissionsWritable | ePermissionsExecutable, 2888 err); 2889 2890 if (err.Success()) 2891 { 2892 m_can_jit = eCanJITYes; 2893 if (log) 2894 log->Printf ("Process::%s pid %" PRIu64 " allocation test passed, CanJIT () is true", __FUNCTION__, GetID ()); 2895 } 2896 else 2897 { 2898 m_can_jit = eCanJITNo; 2899 if (log) 2900 log->Printf ("Process::%s pid %" PRIu64 " allocation test failed, CanJIT () is false: %s", __FUNCTION__, GetID (), err.AsCString ()); 2901 } 2902 2903 DeallocateMemory (allocated_memory); 2904 } 2905 2906 return m_can_jit == eCanJITYes; 2907 } 2908 2909 void 2910 Process::SetCanJIT (bool can_jit) 2911 { 2912 m_can_jit = (can_jit ? eCanJITYes : eCanJITNo); 2913 } 2914 2915 Error 2916 Process::DeallocateMemory (addr_t ptr) 2917 { 2918 Error error; 2919 #if defined (USE_ALLOCATE_MEMORY_CACHE) 2920 if (!m_allocated_memory_cache.DeallocateMemory(ptr)) 2921 { 2922 error.SetErrorStringWithFormat ("deallocation of memory at 0x%" PRIx64 " failed.", (uint64_t)ptr); 2923 } 2924 #else 2925 error = DoDeallocateMemory (ptr); 2926 2927 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2928 if (log) 2929 log->Printf("Process::DeallocateMemory(addr=0x%16.16" PRIx64 ") => err = %s (m_stop_id = %u, m_memory_id = %u)", 2930 ptr, 2931 error.AsCString("SUCCESS"), 2932 m_mod_id.GetStopID(), 2933 m_mod_id.GetMemoryID()); 2934 #endif 2935 return error; 2936 } 2937 2938 2939 ModuleSP 2940 Process::ReadModuleFromMemory (const FileSpec& file_spec, 2941 lldb::addr_t header_addr, 2942 size_t size_to_read) 2943 { 2944 ModuleSP module_sp (new Module (file_spec, ArchSpec())); 2945 if (module_sp) 2946 { 2947 Error error; 2948 ObjectFile *objfile = module_sp->GetMemoryObjectFile (shared_from_this(), header_addr, error, size_to_read); 2949 if (objfile) 2950 return module_sp; 2951 } 2952 return ModuleSP(); 2953 } 2954 2955 Error 2956 Process::EnableWatchpoint (Watchpoint *watchpoint, bool notify) 2957 { 2958 Error error; 2959 error.SetErrorString("watchpoints are not supported"); 2960 return error; 2961 } 2962 2963 Error 2964 Process::DisableWatchpoint (Watchpoint *watchpoint, bool notify) 2965 { 2966 Error error; 2967 error.SetErrorString("watchpoints are not supported"); 2968 return error; 2969 } 2970 2971 StateType 2972 Process::WaitForProcessStopPrivate (const TimeValue *timeout, EventSP &event_sp) 2973 { 2974 StateType state; 2975 // Now wait for the process to launch and return control to us, and then 2976 // call DidLaunch: 2977 while (1) 2978 { 2979 event_sp.reset(); 2980 state = WaitForStateChangedEventsPrivate (timeout, event_sp); 2981 2982 if (StateIsStoppedState(state, false)) 2983 break; 2984 2985 // If state is invalid, then we timed out 2986 if (state == eStateInvalid) 2987 break; 2988 2989 if (event_sp) 2990 HandlePrivateEvent (event_sp); 2991 } 2992 return state; 2993 } 2994 2995 Error 2996 Process::Launch (ProcessLaunchInfo &launch_info) 2997 { 2998 Error error; 2999 m_abi_sp.reset(); 3000 m_dyld_ap.reset(); 3001 m_jit_loaders_ap.reset(); 3002 m_system_runtime_ap.reset(); 3003 m_os_ap.reset(); 3004 m_process_input_reader.reset(); 3005 3006 Module *exe_module = m_target.GetExecutableModulePointer(); 3007 if (exe_module) 3008 { 3009 char local_exec_file_path[PATH_MAX]; 3010 char platform_exec_file_path[PATH_MAX]; 3011 exe_module->GetFileSpec().GetPath(local_exec_file_path, sizeof(local_exec_file_path)); 3012 exe_module->GetPlatformFileSpec().GetPath(platform_exec_file_path, sizeof(platform_exec_file_path)); 3013 if (exe_module->GetFileSpec().Exists()) 3014 { 3015 // Install anything that might need to be installed prior to launching. 3016 // For host systems, this will do nothing, but if we are connected to a 3017 // remote platform it will install any needed binaries 3018 error = GetTarget().Install(&launch_info); 3019 if (error.Fail()) 3020 return error; 3021 3022 if (PrivateStateThreadIsValid ()) 3023 PausePrivateStateThread (); 3024 3025 error = WillLaunch (exe_module); 3026 if (error.Success()) 3027 { 3028 const bool restarted = false; 3029 SetPublicState (eStateLaunching, restarted); 3030 m_should_detach = false; 3031 3032 if (m_public_run_lock.TrySetRunning()) 3033 { 3034 // Now launch using these arguments. 3035 error = DoLaunch (exe_module, launch_info); 3036 } 3037 else 3038 { 3039 // This shouldn't happen 3040 error.SetErrorString("failed to acquire process run lock"); 3041 } 3042 3043 if (error.Fail()) 3044 { 3045 if (GetID() != LLDB_INVALID_PROCESS_ID) 3046 { 3047 SetID (LLDB_INVALID_PROCESS_ID); 3048 const char *error_string = error.AsCString(); 3049 if (error_string == NULL) 3050 error_string = "launch failed"; 3051 SetExitStatus (-1, error_string); 3052 } 3053 } 3054 else 3055 { 3056 EventSP event_sp; 3057 TimeValue timeout_time; 3058 timeout_time = TimeValue::Now(); 3059 timeout_time.OffsetWithSeconds(10); 3060 StateType state = WaitForProcessStopPrivate(&timeout_time, event_sp); 3061 3062 if (state == eStateInvalid || event_sp.get() == NULL) 3063 { 3064 // We were able to launch the process, but we failed to 3065 // catch the initial stop. 3066 SetExitStatus (0, "failed to catch stop after launch"); 3067 Destroy(); 3068 } 3069 else if (state == eStateStopped || state == eStateCrashed) 3070 { 3071 3072 DidLaunch (); 3073 3074 DynamicLoader *dyld = GetDynamicLoader (); 3075 if (dyld) 3076 dyld->DidLaunch(); 3077 3078 GetJITLoaders().DidLaunch(); 3079 3080 SystemRuntime *system_runtime = GetSystemRuntime (); 3081 if (system_runtime) 3082 system_runtime->DidLaunch(); 3083 3084 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3085 3086 // Note, the stop event was consumed above, but not handled. This was done 3087 // to give DidLaunch a chance to run. The target is either stopped or crashed. 3088 // Directly set the state. This is done to prevent a stop message with a bunch 3089 // of spurious output on thread status, as well as not pop a ProcessIOHandler. 3090 SetPublicState(state, false); 3091 3092 if (PrivateStateThreadIsValid ()) 3093 ResumePrivateStateThread (); 3094 else 3095 StartPrivateStateThread (); 3096 } 3097 else if (state == eStateExited) 3098 { 3099 // We exited while trying to launch somehow. Don't call DidLaunch as that's 3100 // not likely to work, and return an invalid pid. 3101 HandlePrivateEvent (event_sp); 3102 } 3103 } 3104 } 3105 } 3106 else 3107 { 3108 error.SetErrorStringWithFormat("file doesn't exist: '%s'", local_exec_file_path); 3109 } 3110 } 3111 return error; 3112 } 3113 3114 3115 Error 3116 Process::LoadCore () 3117 { 3118 Error error = DoLoadCore(); 3119 if (error.Success()) 3120 { 3121 if (PrivateStateThreadIsValid ()) 3122 ResumePrivateStateThread (); 3123 else 3124 StartPrivateStateThread (); 3125 3126 DynamicLoader *dyld = GetDynamicLoader (); 3127 if (dyld) 3128 dyld->DidAttach(); 3129 3130 GetJITLoaders().DidAttach(); 3131 3132 SystemRuntime *system_runtime = GetSystemRuntime (); 3133 if (system_runtime) 3134 system_runtime->DidAttach(); 3135 3136 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3137 // We successfully loaded a core file, now pretend we stopped so we can 3138 // show all of the threads in the core file and explore the crashed 3139 // state. 3140 SetPrivateState (eStateStopped); 3141 3142 } 3143 return error; 3144 } 3145 3146 DynamicLoader * 3147 Process::GetDynamicLoader () 3148 { 3149 if (m_dyld_ap.get() == NULL) 3150 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 3151 return m_dyld_ap.get(); 3152 } 3153 3154 const lldb::DataBufferSP 3155 Process::GetAuxvData() 3156 { 3157 return DataBufferSP (); 3158 } 3159 3160 JITLoaderList & 3161 Process::GetJITLoaders () 3162 { 3163 if (!m_jit_loaders_ap) 3164 { 3165 m_jit_loaders_ap.reset(new JITLoaderList()); 3166 JITLoader::LoadPlugins(this, *m_jit_loaders_ap); 3167 } 3168 return *m_jit_loaders_ap; 3169 } 3170 3171 SystemRuntime * 3172 Process::GetSystemRuntime () 3173 { 3174 if (m_system_runtime_ap.get() == NULL) 3175 m_system_runtime_ap.reset (SystemRuntime::FindPlugin(this)); 3176 return m_system_runtime_ap.get(); 3177 } 3178 3179 Process::AttachCompletionHandler::AttachCompletionHandler (Process *process, uint32_t exec_count) : 3180 NextEventAction (process), 3181 m_exec_count (exec_count) 3182 { 3183 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3184 if (log) 3185 log->Printf ("Process::AttachCompletionHandler::%s process=%p, exec_count=%" PRIu32, __FUNCTION__, static_cast<void*>(process), exec_count); 3186 } 3187 3188 Process::NextEventAction::EventActionResult 3189 Process::AttachCompletionHandler::PerformAction (lldb::EventSP &event_sp) 3190 { 3191 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3192 3193 StateType state = ProcessEventData::GetStateFromEvent (event_sp.get()); 3194 if (log) 3195 log->Printf ("Process::AttachCompletionHandler::%s called with state %s (%d)", __FUNCTION__, StateAsCString(state), static_cast<int> (state)); 3196 3197 switch (state) 3198 { 3199 case eStateRunning: 3200 case eStateConnected: 3201 return eEventActionRetry; 3202 3203 case eStateStopped: 3204 case eStateCrashed: 3205 { 3206 // During attach, prior to sending the eStateStopped event, 3207 // lldb_private::Process subclasses must set the new process ID. 3208 assert (m_process->GetID() != LLDB_INVALID_PROCESS_ID); 3209 // We don't want these events to be reported, so go set the ShouldReportStop here: 3210 m_process->GetThreadList().SetShouldReportStop (eVoteNo); 3211 3212 if (m_exec_count > 0) 3213 { 3214 --m_exec_count; 3215 3216 if (log) 3217 log->Printf ("Process::AttachCompletionHandler::%s state %s: reduced remaining exec count to %" PRIu32 ", requesting resume", __FUNCTION__, StateAsCString(state), m_exec_count); 3218 3219 RequestResume(); 3220 return eEventActionRetry; 3221 } 3222 else 3223 { 3224 if (log) 3225 log->Printf ("Process::AttachCompletionHandler::%s state %s: no more execs expected to start, continuing with attach", __FUNCTION__, StateAsCString(state)); 3226 3227 m_process->CompleteAttach (); 3228 return eEventActionSuccess; 3229 } 3230 } 3231 break; 3232 3233 default: 3234 case eStateExited: 3235 case eStateInvalid: 3236 break; 3237 } 3238 3239 m_exit_string.assign ("No valid Process"); 3240 return eEventActionExit; 3241 } 3242 3243 Process::NextEventAction::EventActionResult 3244 Process::AttachCompletionHandler::HandleBeingInterrupted() 3245 { 3246 return eEventActionSuccess; 3247 } 3248 3249 const char * 3250 Process::AttachCompletionHandler::GetExitString () 3251 { 3252 return m_exit_string.c_str(); 3253 } 3254 3255 Error 3256 Process::Attach (ProcessAttachInfo &attach_info) 3257 { 3258 m_abi_sp.reset(); 3259 m_process_input_reader.reset(); 3260 m_dyld_ap.reset(); 3261 m_jit_loaders_ap.reset(); 3262 m_system_runtime_ap.reset(); 3263 m_os_ap.reset(); 3264 3265 lldb::pid_t attach_pid = attach_info.GetProcessID(); 3266 Error error; 3267 if (attach_pid == LLDB_INVALID_PROCESS_ID) 3268 { 3269 char process_name[PATH_MAX]; 3270 3271 if (attach_info.GetExecutableFile().GetPath (process_name, sizeof(process_name))) 3272 { 3273 const bool wait_for_launch = attach_info.GetWaitForLaunch(); 3274 3275 if (wait_for_launch) 3276 { 3277 error = WillAttachToProcessWithName(process_name, wait_for_launch); 3278 if (error.Success()) 3279 { 3280 if (m_public_run_lock.TrySetRunning()) 3281 { 3282 m_should_detach = true; 3283 const bool restarted = false; 3284 SetPublicState (eStateAttaching, restarted); 3285 // Now attach using these arguments. 3286 error = DoAttachToProcessWithName (process_name, attach_info); 3287 } 3288 else 3289 { 3290 // This shouldn't happen 3291 error.SetErrorString("failed to acquire process run lock"); 3292 } 3293 3294 if (error.Fail()) 3295 { 3296 if (GetID() != LLDB_INVALID_PROCESS_ID) 3297 { 3298 SetID (LLDB_INVALID_PROCESS_ID); 3299 if (error.AsCString() == NULL) 3300 error.SetErrorString("attach failed"); 3301 3302 SetExitStatus(-1, error.AsCString()); 3303 } 3304 } 3305 else 3306 { 3307 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3308 StartPrivateStateThread(); 3309 } 3310 return error; 3311 } 3312 } 3313 else 3314 { 3315 ProcessInstanceInfoList process_infos; 3316 PlatformSP platform_sp (m_target.GetPlatform ()); 3317 3318 if (platform_sp) 3319 { 3320 ProcessInstanceInfoMatch match_info; 3321 match_info.GetProcessInfo() = attach_info; 3322 match_info.SetNameMatchType (eNameMatchEquals); 3323 platform_sp->FindProcesses (match_info, process_infos); 3324 const uint32_t num_matches = process_infos.GetSize(); 3325 if (num_matches == 1) 3326 { 3327 attach_pid = process_infos.GetProcessIDAtIndex(0); 3328 // Fall through and attach using the above process ID 3329 } 3330 else 3331 { 3332 match_info.GetProcessInfo().GetExecutableFile().GetPath (process_name, sizeof(process_name)); 3333 if (num_matches > 1) 3334 { 3335 StreamString s; 3336 ProcessInstanceInfo::DumpTableHeader (s, platform_sp.get(), true, false); 3337 for (size_t i = 0; i < num_matches; i++) 3338 { 3339 process_infos.GetProcessInfoAtIndex(i).DumpAsTableRow(s, platform_sp.get(), true, false); 3340 } 3341 error.SetErrorStringWithFormat ("more than one process named %s:\n%s", 3342 process_name, 3343 s.GetData()); 3344 } 3345 else 3346 error.SetErrorStringWithFormat ("could not find a process named %s", process_name); 3347 } 3348 } 3349 else 3350 { 3351 error.SetErrorString ("invalid platform, can't find processes by name"); 3352 return error; 3353 } 3354 } 3355 } 3356 else 3357 { 3358 error.SetErrorString ("invalid process name"); 3359 } 3360 } 3361 3362 if (attach_pid != LLDB_INVALID_PROCESS_ID) 3363 { 3364 error = WillAttachToProcessWithID(attach_pid); 3365 if (error.Success()) 3366 { 3367 3368 if (m_public_run_lock.TrySetRunning()) 3369 { 3370 // Now attach using these arguments. 3371 m_should_detach = true; 3372 const bool restarted = false; 3373 SetPublicState (eStateAttaching, restarted); 3374 error = DoAttachToProcessWithID (attach_pid, attach_info); 3375 } 3376 else 3377 { 3378 // This shouldn't happen 3379 error.SetErrorString("failed to acquire process run lock"); 3380 } 3381 3382 if (error.Success()) 3383 { 3384 3385 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3386 StartPrivateStateThread(); 3387 } 3388 else 3389 { 3390 if (GetID() != LLDB_INVALID_PROCESS_ID) 3391 { 3392 SetID (LLDB_INVALID_PROCESS_ID); 3393 const char *error_string = error.AsCString(); 3394 if (error_string == NULL) 3395 error_string = "attach failed"; 3396 3397 SetExitStatus(-1, error_string); 3398 } 3399 } 3400 } 3401 } 3402 return error; 3403 } 3404 3405 void 3406 Process::CompleteAttach () 3407 { 3408 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3409 if (log) 3410 log->Printf ("Process::%s()", __FUNCTION__); 3411 3412 // Let the process subclass figure out at much as it can about the process 3413 // before we go looking for a dynamic loader plug-in. 3414 ArchSpec process_arch; 3415 DidAttach(process_arch); 3416 3417 if (process_arch.IsValid()) 3418 { 3419 m_target.SetArchitecture(process_arch); 3420 if (log) 3421 { 3422 const char *triple_str = process_arch.GetTriple().getTriple().c_str (); 3423 log->Printf ("Process::%s replacing process architecture with DidAttach() architecture: %s", 3424 __FUNCTION__, 3425 triple_str ? triple_str : "<null>"); 3426 } 3427 } 3428 3429 // We just attached. If we have a platform, ask it for the process architecture, and if it isn't 3430 // the same as the one we've already set, switch architectures. 3431 PlatformSP platform_sp (m_target.GetPlatform ()); 3432 assert (platform_sp.get()); 3433 if (platform_sp) 3434 { 3435 const ArchSpec &target_arch = m_target.GetArchitecture(); 3436 if (target_arch.IsValid() && !platform_sp->IsCompatibleArchitecture (target_arch, false, NULL)) 3437 { 3438 ArchSpec platform_arch; 3439 platform_sp = platform_sp->GetPlatformForArchitecture (target_arch, &platform_arch); 3440 if (platform_sp) 3441 { 3442 m_target.SetPlatform (platform_sp); 3443 m_target.SetArchitecture(platform_arch); 3444 if (log) 3445 log->Printf ("Process::%s switching platform to %s and architecture to %s based on info from attach", __FUNCTION__, platform_sp->GetName().AsCString (""), platform_arch.GetTriple().getTriple().c_str ()); 3446 } 3447 } 3448 else if (!process_arch.IsValid()) 3449 { 3450 ProcessInstanceInfo process_info; 3451 platform_sp->GetProcessInfo (GetID(), process_info); 3452 const ArchSpec &process_arch = process_info.GetArchitecture(); 3453 if (process_arch.IsValid() && !m_target.GetArchitecture().IsExactMatch(process_arch)) 3454 { 3455 m_target.SetArchitecture (process_arch); 3456 if (log) 3457 log->Printf ("Process::%s switching architecture to %s based on info the platform retrieved for pid %" PRIu64, __FUNCTION__, process_arch.GetTriple().getTriple().c_str (), GetID ()); 3458 } 3459 } 3460 } 3461 3462 // We have completed the attach, now it is time to find the dynamic loader 3463 // plug-in 3464 DynamicLoader *dyld = GetDynamicLoader (); 3465 if (dyld) 3466 { 3467 dyld->DidAttach(); 3468 if (log) 3469 { 3470 ModuleSP exe_module_sp = m_target.GetExecutableModule (); 3471 log->Printf ("Process::%s after DynamicLoader::DidAttach(), target executable is %s (using %s plugin)", 3472 __FUNCTION__, 3473 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>", 3474 dyld->GetPluginName().AsCString ("<unnamed>")); 3475 } 3476 } 3477 3478 GetJITLoaders().DidAttach(); 3479 3480 SystemRuntime *system_runtime = GetSystemRuntime (); 3481 if (system_runtime) 3482 { 3483 system_runtime->DidAttach(); 3484 if (log) 3485 { 3486 ModuleSP exe_module_sp = m_target.GetExecutableModule (); 3487 log->Printf ("Process::%s after SystemRuntime::DidAttach(), target executable is %s (using %s plugin)", 3488 __FUNCTION__, 3489 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>", 3490 system_runtime->GetPluginName().AsCString("<unnamed>")); 3491 } 3492 } 3493 3494 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3495 // Figure out which one is the executable, and set that in our target: 3496 const ModuleList &target_modules = m_target.GetImages(); 3497 Mutex::Locker modules_locker(target_modules.GetMutex()); 3498 size_t num_modules = target_modules.GetSize(); 3499 ModuleSP new_executable_module_sp; 3500 3501 for (size_t i = 0; i < num_modules; i++) 3502 { 3503 ModuleSP module_sp (target_modules.GetModuleAtIndexUnlocked (i)); 3504 if (module_sp && module_sp->IsExecutable()) 3505 { 3506 if (m_target.GetExecutableModulePointer() != module_sp.get()) 3507 new_executable_module_sp = module_sp; 3508 break; 3509 } 3510 } 3511 if (new_executable_module_sp) 3512 { 3513 m_target.SetExecutableModule (new_executable_module_sp, false); 3514 if (log) 3515 { 3516 ModuleSP exe_module_sp = m_target.GetExecutableModule (); 3517 log->Printf ("Process::%s after looping through modules, target executable is %s", 3518 __FUNCTION__, 3519 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>"); 3520 } 3521 } 3522 } 3523 3524 Error 3525 Process::ConnectRemote (Stream *strm, const char *remote_url) 3526 { 3527 m_abi_sp.reset(); 3528 m_process_input_reader.reset(); 3529 3530 // Find the process and its architecture. Make sure it matches the architecture 3531 // of the current Target, and if not adjust it. 3532 3533 Error error (DoConnectRemote (strm, remote_url)); 3534 if (error.Success()) 3535 { 3536 if (GetID() != LLDB_INVALID_PROCESS_ID) 3537 { 3538 EventSP event_sp; 3539 StateType state = WaitForProcessStopPrivate(NULL, event_sp); 3540 3541 if (state == eStateStopped || state == eStateCrashed) 3542 { 3543 // If we attached and actually have a process on the other end, then 3544 // this ended up being the equivalent of an attach. 3545 CompleteAttach (); 3546 3547 // This delays passing the stopped event to listeners till 3548 // CompleteAttach gets a chance to complete... 3549 HandlePrivateEvent (event_sp); 3550 3551 } 3552 } 3553 3554 if (PrivateStateThreadIsValid ()) 3555 ResumePrivateStateThread (); 3556 else 3557 StartPrivateStateThread (); 3558 } 3559 return error; 3560 } 3561 3562 3563 Error 3564 Process::PrivateResume () 3565 { 3566 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_STEP)); 3567 if (log) 3568 log->Printf("Process::PrivateResume() m_stop_id = %u, public state: %s private state: %s", 3569 m_mod_id.GetStopID(), 3570 StateAsCString(m_public_state.GetValue()), 3571 StateAsCString(m_private_state.GetValue())); 3572 3573 Error error (WillResume()); 3574 // Tell the process it is about to resume before the thread list 3575 if (error.Success()) 3576 { 3577 // Now let the thread list know we are about to resume so it 3578 // can let all of our threads know that they are about to be 3579 // resumed. Threads will each be called with 3580 // Thread::WillResume(StateType) where StateType contains the state 3581 // that they are supposed to have when the process is resumed 3582 // (suspended/running/stepping). Threads should also check 3583 // their resume signal in lldb::Thread::GetResumeSignal() 3584 // to see if they are supposed to start back up with a signal. 3585 if (m_thread_list.WillResume()) 3586 { 3587 // Last thing, do the PreResumeActions. 3588 if (!RunPreResumeActions()) 3589 { 3590 error.SetErrorStringWithFormat ("Process::PrivateResume PreResumeActions failed, not resuming."); 3591 } 3592 else 3593 { 3594 m_mod_id.BumpResumeID(); 3595 error = DoResume(); 3596 if (error.Success()) 3597 { 3598 DidResume(); 3599 m_thread_list.DidResume(); 3600 if (log) 3601 log->Printf ("Process thinks the process has resumed."); 3602 } 3603 } 3604 } 3605 else 3606 { 3607 // Somebody wanted to run without running. So generate a continue & a stopped event, 3608 // and let the world handle them. 3609 if (log) 3610 log->Printf ("Process::PrivateResume() asked to simulate a start & stop."); 3611 3612 SetPrivateState(eStateRunning); 3613 SetPrivateState(eStateStopped); 3614 } 3615 } 3616 else if (log) 3617 log->Printf ("Process::PrivateResume() got an error \"%s\".", error.AsCString("<unknown error>")); 3618 return error; 3619 } 3620 3621 Error 3622 Process::Halt (bool clear_thread_plans) 3623 { 3624 // Don't clear the m_clear_thread_plans_on_stop, only set it to true if 3625 // in case it was already set and some thread plan logic calls halt on its 3626 // own. 3627 m_clear_thread_plans_on_stop |= clear_thread_plans; 3628 3629 // First make sure we aren't in the middle of handling an event, or we might restart. This is pretty weak, since 3630 // we could just straightaway get another event. It just narrows the window... 3631 m_currently_handling_event.WaitForValueEqualTo(false); 3632 3633 3634 // Pause our private state thread so we can ensure no one else eats 3635 // the stop event out from under us. 3636 Listener halt_listener ("lldb.process.halt_listener"); 3637 HijackPrivateProcessEvents(&halt_listener); 3638 3639 EventSP event_sp; 3640 Error error (WillHalt()); 3641 3642 bool restored_process_events = false; 3643 if (error.Success()) 3644 { 3645 3646 bool caused_stop = false; 3647 3648 // Ask the process subclass to actually halt our process 3649 error = DoHalt(caused_stop); 3650 if (error.Success()) 3651 { 3652 if (m_public_state.GetValue() == eStateAttaching) 3653 { 3654 // Don't hijack and eat the eStateExited as the code that was doing 3655 // the attach will be waiting for this event... 3656 RestorePrivateProcessEvents(); 3657 restored_process_events = true; 3658 SetExitStatus(SIGKILL, "Cancelled async attach."); 3659 Destroy (); 3660 } 3661 else 3662 { 3663 // If "caused_stop" is true, then DoHalt stopped the process. If 3664 // "caused_stop" is false, the process was already stopped. 3665 // If the DoHalt caused the process to stop, then we want to catch 3666 // this event and set the interrupted bool to true before we pass 3667 // this along so clients know that the process was interrupted by 3668 // a halt command. 3669 if (caused_stop) 3670 { 3671 // Wait for 1 second for the process to stop. 3672 TimeValue timeout_time; 3673 timeout_time = TimeValue::Now(); 3674 timeout_time.OffsetWithSeconds(10); 3675 bool got_event = halt_listener.WaitForEvent (&timeout_time, event_sp); 3676 StateType state = ProcessEventData::GetStateFromEvent(event_sp.get()); 3677 3678 if (!got_event || state == eStateInvalid) 3679 { 3680 // We timeout out and didn't get a stop event... 3681 error.SetErrorStringWithFormat ("Halt timed out. State = %s", StateAsCString(GetState())); 3682 } 3683 else 3684 { 3685 if (StateIsStoppedState (state, false)) 3686 { 3687 // We caused the process to interrupt itself, so mark this 3688 // as such in the stop event so clients can tell an interrupted 3689 // process from a natural stop 3690 ProcessEventData::SetInterruptedInEvent (event_sp.get(), true); 3691 } 3692 else 3693 { 3694 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3695 if (log) 3696 log->Printf("Process::Halt() failed to stop, state is: %s", StateAsCString(state)); 3697 error.SetErrorString ("Did not get stopped event after halt."); 3698 } 3699 } 3700 } 3701 DidHalt(); 3702 } 3703 } 3704 } 3705 // Resume our private state thread before we post the event (if any) 3706 if (!restored_process_events) 3707 RestorePrivateProcessEvents(); 3708 3709 // Post any event we might have consumed. If all goes well, we will have 3710 // stopped the process, intercepted the event and set the interrupted 3711 // bool in the event. Post it to the private event queue and that will end up 3712 // correctly setting the state. 3713 if (event_sp) 3714 m_private_state_broadcaster.BroadcastEvent(event_sp); 3715 3716 return error; 3717 } 3718 3719 Error 3720 Process::HaltForDestroyOrDetach(lldb::EventSP &exit_event_sp) 3721 { 3722 Error error; 3723 if (m_public_state.GetValue() == eStateRunning) 3724 { 3725 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3726 if (log) 3727 log->Printf("Process::Destroy() About to halt."); 3728 error = Halt(); 3729 if (error.Success()) 3730 { 3731 // Consume the halt event. 3732 TimeValue timeout (TimeValue::Now()); 3733 timeout.OffsetWithSeconds(1); 3734 StateType state = WaitForProcessToStop (&timeout, &exit_event_sp); 3735 3736 // If the process exited while we were waiting for it to stop, put the exited event into 3737 // the shared pointer passed in and return. Our caller doesn't need to do anything else, since 3738 // they don't have a process anymore... 3739 3740 if (state == eStateExited || m_private_state.GetValue() == eStateExited) 3741 { 3742 if (log) 3743 log->Printf("Process::HaltForDestroyOrDetach() Process exited while waiting to Halt."); 3744 return error; 3745 } 3746 else 3747 exit_event_sp.reset(); // It is ok to consume any non-exit stop events 3748 3749 if (state != eStateStopped) 3750 { 3751 if (log) 3752 log->Printf("Process::HaltForDestroyOrDetach() Halt failed to stop, state is: %s", StateAsCString(state)); 3753 // If we really couldn't stop the process then we should just error out here, but if the 3754 // lower levels just bobbled sending the event and we really are stopped, then continue on. 3755 StateType private_state = m_private_state.GetValue(); 3756 if (private_state != eStateStopped) 3757 { 3758 return error; 3759 } 3760 } 3761 } 3762 else 3763 { 3764 if (log) 3765 log->Printf("Process::HaltForDestroyOrDetach() Halt got error: %s", error.AsCString()); 3766 } 3767 } 3768 return error; 3769 } 3770 3771 Error 3772 Process::Detach (bool keep_stopped) 3773 { 3774 EventSP exit_event_sp; 3775 Error error; 3776 m_destroy_in_process = true; 3777 3778 error = WillDetach(); 3779 3780 if (error.Success()) 3781 { 3782 if (DetachRequiresHalt()) 3783 { 3784 error = HaltForDestroyOrDetach (exit_event_sp); 3785 if (!error.Success()) 3786 { 3787 m_destroy_in_process = false; 3788 return error; 3789 } 3790 else if (exit_event_sp) 3791 { 3792 // We shouldn't need to do anything else here. There's no process left to detach from... 3793 StopPrivateStateThread(); 3794 m_destroy_in_process = false; 3795 return error; 3796 } 3797 } 3798 3799 m_thread_list.DiscardThreadPlans(); 3800 DisableAllBreakpointSites(); 3801 3802 error = DoDetach(keep_stopped); 3803 if (error.Success()) 3804 { 3805 DidDetach(); 3806 StopPrivateStateThread(); 3807 } 3808 else 3809 { 3810 return error; 3811 } 3812 } 3813 m_destroy_in_process = false; 3814 3815 // If we exited when we were waiting for a process to stop, then 3816 // forward the event here so we don't lose the event 3817 if (exit_event_sp) 3818 { 3819 // Directly broadcast our exited event because we shut down our 3820 // private state thread above 3821 BroadcastEvent(exit_event_sp); 3822 } 3823 3824 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 3825 // the last events through the event system, in which case we might strand the write lock. Unlock 3826 // it here so when we do to tear down the process we don't get an error destroying the lock. 3827 3828 m_public_run_lock.SetStopped(); 3829 return error; 3830 } 3831 3832 Error 3833 Process::Destroy () 3834 { 3835 3836 // Tell ourselves we are in the process of destroying the process, so that we don't do any unnecessary work 3837 // that might hinder the destruction. Remember to set this back to false when we are done. That way if the attempt 3838 // failed and the process stays around for some reason it won't be in a confused state. 3839 3840 m_destroy_in_process = true; 3841 3842 Error error (WillDestroy()); 3843 if (error.Success()) 3844 { 3845 EventSP exit_event_sp; 3846 if (DestroyRequiresHalt()) 3847 { 3848 error = HaltForDestroyOrDetach(exit_event_sp); 3849 } 3850 3851 if (m_public_state.GetValue() != eStateRunning) 3852 { 3853 // Ditch all thread plans, and remove all our breakpoints: in case we have to restart the target to 3854 // kill it, we don't want it hitting a breakpoint... 3855 // Only do this if we've stopped, however, since if we didn't manage to halt it above, then 3856 // we're not going to have much luck doing this now. 3857 m_thread_list.DiscardThreadPlans(); 3858 DisableAllBreakpointSites(); 3859 } 3860 3861 error = DoDestroy(); 3862 if (error.Success()) 3863 { 3864 DidDestroy(); 3865 StopPrivateStateThread(); 3866 } 3867 m_stdio_communication.StopReadThread(); 3868 m_stdio_communication.Disconnect(); 3869 3870 if (m_process_input_reader) 3871 { 3872 m_process_input_reader->SetIsDone(true); 3873 m_process_input_reader->Cancel(); 3874 m_process_input_reader.reset(); 3875 } 3876 3877 // If we exited when we were waiting for a process to stop, then 3878 // forward the event here so we don't lose the event 3879 if (exit_event_sp) 3880 { 3881 // Directly broadcast our exited event because we shut down our 3882 // private state thread above 3883 BroadcastEvent(exit_event_sp); 3884 } 3885 3886 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 3887 // the last events through the event system, in which case we might strand the write lock. Unlock 3888 // it here so when we do to tear down the process we don't get an error destroying the lock. 3889 m_public_run_lock.SetStopped(); 3890 } 3891 3892 m_destroy_in_process = false; 3893 3894 return error; 3895 } 3896 3897 Error 3898 Process::Signal (int signal) 3899 { 3900 Error error (WillSignal()); 3901 if (error.Success()) 3902 { 3903 error = DoSignal(signal); 3904 if (error.Success()) 3905 DidSignal(); 3906 } 3907 return error; 3908 } 3909 3910 lldb::ByteOrder 3911 Process::GetByteOrder () const 3912 { 3913 return m_target.GetArchitecture().GetByteOrder(); 3914 } 3915 3916 uint32_t 3917 Process::GetAddressByteSize () const 3918 { 3919 return m_target.GetArchitecture().GetAddressByteSize(); 3920 } 3921 3922 3923 bool 3924 Process::ShouldBroadcastEvent (Event *event_ptr) 3925 { 3926 const StateType state = Process::ProcessEventData::GetStateFromEvent (event_ptr); 3927 bool return_value = true; 3928 Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_EVENTS | LIBLLDB_LOG_PROCESS)); 3929 3930 switch (state) 3931 { 3932 case eStateConnected: 3933 case eStateAttaching: 3934 case eStateLaunching: 3935 case eStateDetached: 3936 case eStateExited: 3937 case eStateUnloaded: 3938 // These events indicate changes in the state of the debugging session, always report them. 3939 return_value = true; 3940 break; 3941 case eStateInvalid: 3942 // We stopped for no apparent reason, don't report it. 3943 return_value = false; 3944 break; 3945 case eStateRunning: 3946 case eStateStepping: 3947 // If we've started the target running, we handle the cases where we 3948 // are already running and where there is a transition from stopped to 3949 // running differently. 3950 // running -> running: Automatically suppress extra running events 3951 // stopped -> running: Report except when there is one or more no votes 3952 // and no yes votes. 3953 SynchronouslyNotifyStateChanged (state); 3954 if (m_force_next_event_delivery) 3955 return_value = true; 3956 else 3957 { 3958 switch (m_last_broadcast_state) 3959 { 3960 case eStateRunning: 3961 case eStateStepping: 3962 // We always suppress multiple runnings with no PUBLIC stop in between. 3963 return_value = false; 3964 break; 3965 default: 3966 // TODO: make this work correctly. For now always report 3967 // run if we aren't running so we don't miss any running 3968 // events. If I run the lldb/test/thread/a.out file and 3969 // break at main.cpp:58, run and hit the breakpoints on 3970 // multiple threads, then somehow during the stepping over 3971 // of all breakpoints no run gets reported. 3972 3973 // This is a transition from stop to run. 3974 switch (m_thread_list.ShouldReportRun (event_ptr)) 3975 { 3976 case eVoteYes: 3977 case eVoteNoOpinion: 3978 return_value = true; 3979 break; 3980 case eVoteNo: 3981 return_value = false; 3982 break; 3983 } 3984 break; 3985 } 3986 } 3987 break; 3988 case eStateStopped: 3989 case eStateCrashed: 3990 case eStateSuspended: 3991 { 3992 // We've stopped. First see if we're going to restart the target. 3993 // If we are going to stop, then we always broadcast the event. 3994 // If we aren't going to stop, let the thread plans decide if we're going to report this event. 3995 // If no thread has an opinion, we don't report it. 3996 3997 RefreshStateAfterStop (); 3998 if (ProcessEventData::GetInterruptedFromEvent (event_ptr)) 3999 { 4000 if (log) 4001 log->Printf ("Process::ShouldBroadcastEvent (%p) stopped due to an interrupt, state: %s", 4002 static_cast<void*>(event_ptr), 4003 StateAsCString(state)); 4004 // Even though we know we are going to stop, we should let the threads have a look at the stop, 4005 // so they can properly set their state. 4006 m_thread_list.ShouldStop (event_ptr); 4007 return_value = true; 4008 } 4009 else 4010 { 4011 bool was_restarted = ProcessEventData::GetRestartedFromEvent (event_ptr); 4012 bool should_resume = false; 4013 4014 // It makes no sense to ask "ShouldStop" if we've already been restarted... 4015 // Asking the thread list is also not likely to go well, since we are running again. 4016 // So in that case just report the event. 4017 4018 if (!was_restarted) 4019 should_resume = m_thread_list.ShouldStop (event_ptr) == false; 4020 4021 if (was_restarted || should_resume || m_resume_requested) 4022 { 4023 Vote stop_vote = m_thread_list.ShouldReportStop (event_ptr); 4024 if (log) 4025 log->Printf ("Process::ShouldBroadcastEvent: should_stop: %i state: %s was_restarted: %i stop_vote: %d.", 4026 should_resume, StateAsCString(state), 4027 was_restarted, stop_vote); 4028 4029 switch (stop_vote) 4030 { 4031 case eVoteYes: 4032 return_value = true; 4033 break; 4034 case eVoteNoOpinion: 4035 case eVoteNo: 4036 return_value = false; 4037 break; 4038 } 4039 4040 if (!was_restarted) 4041 { 4042 if (log) 4043 log->Printf ("Process::ShouldBroadcastEvent (%p) Restarting process from state: %s", 4044 static_cast<void*>(event_ptr), 4045 StateAsCString(state)); 4046 ProcessEventData::SetRestartedInEvent(event_ptr, true); 4047 PrivateResume (); 4048 } 4049 4050 } 4051 else 4052 { 4053 return_value = true; 4054 SynchronouslyNotifyStateChanged (state); 4055 } 4056 } 4057 } 4058 break; 4059 } 4060 4061 // Forcing the next event delivery is a one shot deal. So reset it here. 4062 m_force_next_event_delivery = false; 4063 4064 // We do some coalescing of events (for instance two consecutive running events get coalesced.) 4065 // But we only coalesce against events we actually broadcast. So we use m_last_broadcast_state 4066 // to track that. NB - you can't use "m_public_state.GetValue()" for that purpose, as was originally done, 4067 // because the PublicState reflects the last event pulled off the queue, and there may be several 4068 // events stacked up on the queue unserviced. So the PublicState may not reflect the last broadcasted event 4069 // yet. m_last_broadcast_state gets updated here. 4070 4071 if (return_value) 4072 m_last_broadcast_state = state; 4073 4074 if (log) 4075 log->Printf ("Process::ShouldBroadcastEvent (%p) => new state: %s, last broadcast state: %s - %s", 4076 static_cast<void*>(event_ptr), StateAsCString(state), 4077 StateAsCString(m_last_broadcast_state), 4078 return_value ? "YES" : "NO"); 4079 return return_value; 4080 } 4081 4082 4083 bool 4084 Process::StartPrivateStateThread (bool force) 4085 { 4086 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EVENTS)); 4087 4088 bool already_running = PrivateStateThreadIsValid (); 4089 if (log) 4090 log->Printf ("Process::%s()%s ", __FUNCTION__, already_running ? " already running" : " starting private state thread"); 4091 4092 if (!force && already_running) 4093 return true; 4094 4095 // Create a thread that watches our internal state and controls which 4096 // events make it to clients (into the DCProcess event queue). 4097 char thread_name[1024]; 4098 4099 if (HostInfo::GetMaxThreadNameLength() <= 30) 4100 { 4101 // On platforms with abbreviated thread name lengths, choose thread names that fit within the limit. 4102 if (already_running) 4103 snprintf(thread_name, sizeof(thread_name), "intern-state-OV"); 4104 else 4105 snprintf(thread_name, sizeof(thread_name), "intern-state"); 4106 } 4107 else 4108 { 4109 if (already_running) 4110 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state-override(pid=%" PRIu64 ")>", GetID()); 4111 else 4112 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state(pid=%" PRIu64 ")>", GetID()); 4113 } 4114 4115 // Create the private state thread, and start it running. 4116 m_private_state_thread = ThreadLauncher::LaunchThread(thread_name, Process::PrivateStateThread, this, NULL); 4117 if (m_private_state_thread.IsJoinable()) 4118 { 4119 ResumePrivateStateThread(); 4120 return true; 4121 } 4122 else 4123 return false; 4124 } 4125 4126 void 4127 Process::PausePrivateStateThread () 4128 { 4129 ControlPrivateStateThread (eBroadcastInternalStateControlPause); 4130 } 4131 4132 void 4133 Process::ResumePrivateStateThread () 4134 { 4135 ControlPrivateStateThread (eBroadcastInternalStateControlResume); 4136 } 4137 4138 void 4139 Process::StopPrivateStateThread () 4140 { 4141 if (PrivateStateThreadIsValid ()) 4142 ControlPrivateStateThread (eBroadcastInternalStateControlStop); 4143 else 4144 { 4145 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4146 if (log) 4147 log->Printf ("Went to stop the private state thread, but it was already invalid."); 4148 } 4149 } 4150 4151 void 4152 Process::ControlPrivateStateThread (uint32_t signal) 4153 { 4154 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4155 4156 assert (signal == eBroadcastInternalStateControlStop || 4157 signal == eBroadcastInternalStateControlPause || 4158 signal == eBroadcastInternalStateControlResume); 4159 4160 if (log) 4161 log->Printf ("Process::%s (signal = %d)", __FUNCTION__, signal); 4162 4163 // Signal the private state thread. First we should copy this is case the 4164 // thread starts exiting since the private state thread will NULL this out 4165 // when it exits 4166 HostThread private_state_thread(m_private_state_thread); 4167 if (private_state_thread.IsJoinable()) 4168 { 4169 TimeValue timeout_time; 4170 bool timed_out; 4171 4172 m_private_state_control_broadcaster.BroadcastEvent (signal, NULL); 4173 4174 timeout_time = TimeValue::Now(); 4175 timeout_time.OffsetWithSeconds(2); 4176 if (log) 4177 log->Printf ("Sending control event of type: %d.", signal); 4178 m_private_state_control_wait.WaitForValueEqualTo (true, &timeout_time, &timed_out); 4179 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4180 4181 if (signal == eBroadcastInternalStateControlStop) 4182 { 4183 if (timed_out) 4184 { 4185 Error error = private_state_thread.Cancel(); 4186 if (log) 4187 log->Printf ("Timed out responding to the control event, cancel got error: \"%s\".", error.AsCString()); 4188 } 4189 else 4190 { 4191 if (log) 4192 log->Printf ("The control event killed the private state thread without having to cancel."); 4193 } 4194 4195 thread_result_t result = NULL; 4196 private_state_thread.Join(&result); 4197 m_private_state_thread.Reset(); 4198 } 4199 } 4200 else 4201 { 4202 if (log) 4203 log->Printf ("Private state thread already dead, no need to signal it to stop."); 4204 } 4205 } 4206 4207 void 4208 Process::SendAsyncInterrupt () 4209 { 4210 if (PrivateStateThreadIsValid()) 4211 m_private_state_broadcaster.BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4212 else 4213 BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4214 } 4215 4216 void 4217 Process::HandlePrivateEvent (EventSP &event_sp) 4218 { 4219 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4220 m_resume_requested = false; 4221 4222 m_currently_handling_event.SetValue(true, eBroadcastNever); 4223 4224 const StateType new_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4225 4226 // First check to see if anybody wants a shot at this event: 4227 if (m_next_event_action_ap.get() != NULL) 4228 { 4229 NextEventAction::EventActionResult action_result = m_next_event_action_ap->PerformAction(event_sp); 4230 if (log) 4231 log->Printf ("Ran next event action, result was %d.", action_result); 4232 4233 switch (action_result) 4234 { 4235 case NextEventAction::eEventActionSuccess: 4236 SetNextEventAction(NULL); 4237 break; 4238 4239 case NextEventAction::eEventActionRetry: 4240 break; 4241 4242 case NextEventAction::eEventActionExit: 4243 // Handle Exiting Here. If we already got an exited event, 4244 // we should just propagate it. Otherwise, swallow this event, 4245 // and set our state to exit so the next event will kill us. 4246 if (new_state != eStateExited) 4247 { 4248 // FIXME: should cons up an exited event, and discard this one. 4249 SetExitStatus(0, m_next_event_action_ap->GetExitString()); 4250 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4251 SetNextEventAction(NULL); 4252 return; 4253 } 4254 SetNextEventAction(NULL); 4255 break; 4256 } 4257 } 4258 4259 // See if we should broadcast this state to external clients? 4260 const bool should_broadcast = ShouldBroadcastEvent (event_sp.get()); 4261 4262 if (should_broadcast) 4263 { 4264 const bool is_hijacked = IsHijackedForEvent(eBroadcastBitStateChanged); 4265 if (log) 4266 { 4267 log->Printf ("Process::%s (pid = %" PRIu64 ") broadcasting new state %s (old state %s) to %s", 4268 __FUNCTION__, 4269 GetID(), 4270 StateAsCString(new_state), 4271 StateAsCString (GetState ()), 4272 is_hijacked ? "hijacked" : "public"); 4273 } 4274 Process::ProcessEventData::SetUpdateStateOnRemoval(event_sp.get()); 4275 if (StateIsRunningState (new_state)) 4276 { 4277 // Only push the input handler if we aren't fowarding events, 4278 // as this means the curses GUI is in use... 4279 // Or don't push it if we are launching since it will come up stopped. 4280 if (!GetTarget().GetDebugger().IsForwardingEvents() && new_state != eStateLaunching) 4281 PushProcessIOHandler (); 4282 m_iohandler_sync.SetValue(true, eBroadcastAlways); 4283 } 4284 else if (StateIsStoppedState(new_state, false)) 4285 { 4286 m_iohandler_sync.SetValue(false, eBroadcastNever); 4287 if (!Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 4288 { 4289 // If the lldb_private::Debugger is handling the events, we don't 4290 // want to pop the process IOHandler here, we want to do it when 4291 // we receive the stopped event so we can carefully control when 4292 // the process IOHandler is popped because when we stop we want to 4293 // display some text stating how and why we stopped, then maybe some 4294 // process/thread/frame info, and then we want the "(lldb) " prompt 4295 // to show up. If we pop the process IOHandler here, then we will 4296 // cause the command interpreter to become the top IOHandler after 4297 // the process pops off and it will update its prompt right away... 4298 // See the Debugger.cpp file where it calls the function as 4299 // "process_sp->PopProcessIOHandler()" to see where I am talking about. 4300 // Otherwise we end up getting overlapping "(lldb) " prompts and 4301 // garbled output. 4302 // 4303 // If we aren't handling the events in the debugger (which is indicated 4304 // by "m_target.GetDebugger().IsHandlingEvents()" returning false) or we 4305 // are hijacked, then we always pop the process IO handler manually. 4306 // Hijacking happens when the internal process state thread is running 4307 // thread plans, or when commands want to run in synchronous mode 4308 // and they call "process->WaitForProcessToStop()". An example of something 4309 // that will hijack the events is a simple expression: 4310 // 4311 // (lldb) expr (int)puts("hello") 4312 // 4313 // This will cause the internal process state thread to resume and halt 4314 // the process (and _it_ will hijack the eBroadcastBitStateChanged 4315 // events) and we do need the IO handler to be pushed and popped 4316 // correctly. 4317 4318 if (is_hijacked || m_target.GetDebugger().IsHandlingEvents() == false) 4319 PopProcessIOHandler (); 4320 } 4321 } 4322 4323 BroadcastEvent (event_sp); 4324 } 4325 else 4326 { 4327 if (log) 4328 { 4329 log->Printf ("Process::%s (pid = %" PRIu64 ") suppressing state %s (old state %s): should_broadcast == false", 4330 __FUNCTION__, 4331 GetID(), 4332 StateAsCString(new_state), 4333 StateAsCString (GetState ())); 4334 } 4335 } 4336 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4337 } 4338 4339 thread_result_t 4340 Process::PrivateStateThread (void *arg) 4341 { 4342 Process *proc = static_cast<Process*> (arg); 4343 thread_result_t result = proc->RunPrivateStateThread(); 4344 return result; 4345 } 4346 4347 thread_result_t 4348 Process::RunPrivateStateThread () 4349 { 4350 bool control_only = true; 4351 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4352 4353 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4354 if (log) 4355 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread starting...", 4356 __FUNCTION__, static_cast<void*>(this), GetID()); 4357 4358 bool exit_now = false; 4359 while (!exit_now) 4360 { 4361 EventSP event_sp; 4362 WaitForEventsPrivate (NULL, event_sp, control_only); 4363 if (event_sp->BroadcasterIs(&m_private_state_control_broadcaster)) 4364 { 4365 if (log) 4366 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") got a control event: %d", 4367 __FUNCTION__, static_cast<void*>(this), GetID(), 4368 event_sp->GetType()); 4369 4370 switch (event_sp->GetType()) 4371 { 4372 case eBroadcastInternalStateControlStop: 4373 exit_now = true; 4374 break; // doing any internal state management below 4375 4376 case eBroadcastInternalStateControlPause: 4377 control_only = true; 4378 break; 4379 4380 case eBroadcastInternalStateControlResume: 4381 control_only = false; 4382 break; 4383 } 4384 4385 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4386 continue; 4387 } 4388 else if (event_sp->GetType() == eBroadcastBitInterrupt) 4389 { 4390 if (m_public_state.GetValue() == eStateAttaching) 4391 { 4392 if (log) 4393 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt while attaching - forwarding interrupt.", 4394 __FUNCTION__, static_cast<void*>(this), 4395 GetID()); 4396 BroadcastEvent (eBroadcastBitInterrupt, NULL); 4397 } 4398 else 4399 { 4400 if (log) 4401 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt - Halting.", 4402 __FUNCTION__, static_cast<void*>(this), 4403 GetID()); 4404 Halt(); 4405 } 4406 continue; 4407 } 4408 4409 const StateType internal_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4410 4411 if (internal_state != eStateInvalid) 4412 { 4413 if (m_clear_thread_plans_on_stop && 4414 StateIsStoppedState(internal_state, true)) 4415 { 4416 m_clear_thread_plans_on_stop = false; 4417 m_thread_list.DiscardThreadPlans(); 4418 } 4419 HandlePrivateEvent (event_sp); 4420 } 4421 4422 if (internal_state == eStateInvalid || 4423 internal_state == eStateExited || 4424 internal_state == eStateDetached ) 4425 { 4426 if (log) 4427 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") about to exit with internal state %s...", 4428 __FUNCTION__, static_cast<void*>(this), GetID(), 4429 StateAsCString(internal_state)); 4430 4431 break; 4432 } 4433 } 4434 4435 // Verify log is still enabled before attempting to write to it... 4436 if (log) 4437 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", 4438 __FUNCTION__, static_cast<void*>(this), GetID()); 4439 4440 m_public_run_lock.SetStopped(); 4441 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4442 m_private_state_thread.Reset(); 4443 return NULL; 4444 } 4445 4446 //------------------------------------------------------------------ 4447 // Process Event Data 4448 //------------------------------------------------------------------ 4449 4450 Process::ProcessEventData::ProcessEventData () : 4451 EventData (), 4452 m_process_sp (), 4453 m_state (eStateInvalid), 4454 m_restarted (false), 4455 m_update_state (0), 4456 m_interrupted (false) 4457 { 4458 } 4459 4460 Process::ProcessEventData::ProcessEventData (const ProcessSP &process_sp, StateType state) : 4461 EventData (), 4462 m_process_sp (process_sp), 4463 m_state (state), 4464 m_restarted (false), 4465 m_update_state (0), 4466 m_interrupted (false) 4467 { 4468 } 4469 4470 Process::ProcessEventData::~ProcessEventData() 4471 { 4472 } 4473 4474 const ConstString & 4475 Process::ProcessEventData::GetFlavorString () 4476 { 4477 static ConstString g_flavor ("Process::ProcessEventData"); 4478 return g_flavor; 4479 } 4480 4481 const ConstString & 4482 Process::ProcessEventData::GetFlavor () const 4483 { 4484 return ProcessEventData::GetFlavorString (); 4485 } 4486 4487 void 4488 Process::ProcessEventData::DoOnRemoval (Event *event_ptr) 4489 { 4490 // This function gets called twice for each event, once when the event gets pulled 4491 // off of the private process event queue, and then any number of times, first when it gets pulled off of 4492 // the public event queue, then other times when we're pretending that this is where we stopped at the 4493 // end of expression evaluation. m_update_state is used to distinguish these 4494 // three cases; it is 0 when we're just pulling it off for private handling, 4495 // and > 1 for expression evaluation, and we don't want to do the breakpoint command handling then. 4496 if (m_update_state != 1) 4497 return; 4498 4499 m_process_sp->SetPublicState (m_state, Process::ProcessEventData::GetRestartedFromEvent(event_ptr)); 4500 4501 // If this is a halt event, even if the halt stopped with some reason other than a plain interrupt (e.g. we had 4502 // already stopped for a breakpoint when the halt request came through) don't do the StopInfo actions, as they may 4503 // end up restarting the process. 4504 if (m_interrupted) 4505 return; 4506 4507 // If we're stopped and haven't restarted, then do the StopInfo actions here: 4508 if (m_state == eStateStopped && ! m_restarted) 4509 { 4510 ThreadList &curr_thread_list = m_process_sp->GetThreadList(); 4511 uint32_t num_threads = curr_thread_list.GetSize(); 4512 uint32_t idx; 4513 4514 // The actions might change one of the thread's stop_info's opinions about whether we should 4515 // stop the process, so we need to query that as we go. 4516 4517 // One other complication here, is that we try to catch any case where the target has run (except for expressions) 4518 // and immediately exit, but if we get that wrong (which is possible) then the thread list might have changed, and 4519 // that would cause our iteration here to crash. We could make a copy of the thread list, but we'd really like 4520 // 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 4521 // against this list & bag out if anything differs. 4522 std::vector<uint32_t> thread_index_array(num_threads); 4523 for (idx = 0; idx < num_threads; ++idx) 4524 thread_index_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetIndexID(); 4525 4526 // Use this to track whether we should continue from here. We will only continue the target running if 4527 // no thread says we should stop. Of course if some thread's PerformAction actually sets the target running, 4528 // then it doesn't matter what the other threads say... 4529 4530 bool still_should_stop = false; 4531 4532 // Sometimes - for instance if we have a bug in the stub we are talking to, we stop but no thread has a 4533 // valid stop reason. In that case we should just stop, because we have no way of telling what the right 4534 // thing to do is, and it's better to let the user decide than continue behind their backs. 4535 4536 bool does_anybody_have_an_opinion = false; 4537 4538 for (idx = 0; idx < num_threads; ++idx) 4539 { 4540 curr_thread_list = m_process_sp->GetThreadList(); 4541 if (curr_thread_list.GetSize() != num_threads) 4542 { 4543 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4544 if (log) 4545 log->Printf("Number of threads changed from %u to %u while processing event.", num_threads, curr_thread_list.GetSize()); 4546 break; 4547 } 4548 4549 lldb::ThreadSP thread_sp = curr_thread_list.GetThreadAtIndex(idx); 4550 4551 if (thread_sp->GetIndexID() != thread_index_array[idx]) 4552 { 4553 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4554 if (log) 4555 log->Printf("The thread at position %u changed from %u to %u while processing event.", 4556 idx, 4557 thread_index_array[idx], 4558 thread_sp->GetIndexID()); 4559 break; 4560 } 4561 4562 StopInfoSP stop_info_sp = thread_sp->GetStopInfo (); 4563 if (stop_info_sp && stop_info_sp->IsValid()) 4564 { 4565 does_anybody_have_an_opinion = true; 4566 bool this_thread_wants_to_stop; 4567 if (stop_info_sp->GetOverrideShouldStop()) 4568 { 4569 this_thread_wants_to_stop = stop_info_sp->GetOverriddenShouldStopValue(); 4570 } 4571 else 4572 { 4573 stop_info_sp->PerformAction(event_ptr); 4574 // The stop action might restart the target. If it does, then we want to mark that in the 4575 // event so that whoever is receiving it will know to wait for the running event and reflect 4576 // that state appropriately. 4577 // We also need to stop processing actions, since they aren't expecting the target to be running. 4578 4579 // FIXME: we might have run. 4580 if (stop_info_sp->HasTargetRunSinceMe()) 4581 { 4582 SetRestarted (true); 4583 break; 4584 } 4585 4586 this_thread_wants_to_stop = stop_info_sp->ShouldStop(event_ptr); 4587 } 4588 4589 if (still_should_stop == false) 4590 still_should_stop = this_thread_wants_to_stop; 4591 } 4592 } 4593 4594 4595 if (!GetRestarted()) 4596 { 4597 if (!still_should_stop && does_anybody_have_an_opinion) 4598 { 4599 // We've been asked to continue, so do that here. 4600 SetRestarted(true); 4601 // Use the public resume method here, since this is just 4602 // extending a public resume. 4603 m_process_sp->PrivateResume(); 4604 } 4605 else 4606 { 4607 // If we didn't restart, run the Stop Hooks here: 4608 // They might also restart the target, so watch for that. 4609 m_process_sp->GetTarget().RunStopHooks(); 4610 if (m_process_sp->GetPrivateState() == eStateRunning) 4611 SetRestarted(true); 4612 } 4613 } 4614 } 4615 } 4616 4617 void 4618 Process::ProcessEventData::Dump (Stream *s) const 4619 { 4620 if (m_process_sp) 4621 s->Printf(" process = %p (pid = %" PRIu64 "), ", 4622 static_cast<void*>(m_process_sp.get()), m_process_sp->GetID()); 4623 4624 s->Printf("state = %s", StateAsCString(GetState())); 4625 } 4626 4627 const Process::ProcessEventData * 4628 Process::ProcessEventData::GetEventDataFromEvent (const Event *event_ptr) 4629 { 4630 if (event_ptr) 4631 { 4632 const EventData *event_data = event_ptr->GetData(); 4633 if (event_data && event_data->GetFlavor() == ProcessEventData::GetFlavorString()) 4634 return static_cast <const ProcessEventData *> (event_ptr->GetData()); 4635 } 4636 return NULL; 4637 } 4638 4639 ProcessSP 4640 Process::ProcessEventData::GetProcessFromEvent (const Event *event_ptr) 4641 { 4642 ProcessSP process_sp; 4643 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4644 if (data) 4645 process_sp = data->GetProcessSP(); 4646 return process_sp; 4647 } 4648 4649 StateType 4650 Process::ProcessEventData::GetStateFromEvent (const Event *event_ptr) 4651 { 4652 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4653 if (data == NULL) 4654 return eStateInvalid; 4655 else 4656 return data->GetState(); 4657 } 4658 4659 bool 4660 Process::ProcessEventData::GetRestartedFromEvent (const Event *event_ptr) 4661 { 4662 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4663 if (data == NULL) 4664 return false; 4665 else 4666 return data->GetRestarted(); 4667 } 4668 4669 void 4670 Process::ProcessEventData::SetRestartedInEvent (Event *event_ptr, bool new_value) 4671 { 4672 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4673 if (data != NULL) 4674 data->SetRestarted(new_value); 4675 } 4676 4677 size_t 4678 Process::ProcessEventData::GetNumRestartedReasons(const Event *event_ptr) 4679 { 4680 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4681 if (data != NULL) 4682 return data->GetNumRestartedReasons(); 4683 else 4684 return 0; 4685 } 4686 4687 const char * 4688 Process::ProcessEventData::GetRestartedReasonAtIndex(const Event *event_ptr, size_t idx) 4689 { 4690 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4691 if (data != NULL) 4692 return data->GetRestartedReasonAtIndex(idx); 4693 else 4694 return NULL; 4695 } 4696 4697 void 4698 Process::ProcessEventData::AddRestartedReason (Event *event_ptr, const char *reason) 4699 { 4700 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4701 if (data != NULL) 4702 data->AddRestartedReason(reason); 4703 } 4704 4705 bool 4706 Process::ProcessEventData::GetInterruptedFromEvent (const Event *event_ptr) 4707 { 4708 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4709 if (data == NULL) 4710 return false; 4711 else 4712 return data->GetInterrupted (); 4713 } 4714 4715 void 4716 Process::ProcessEventData::SetInterruptedInEvent (Event *event_ptr, bool new_value) 4717 { 4718 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4719 if (data != NULL) 4720 data->SetInterrupted(new_value); 4721 } 4722 4723 bool 4724 Process::ProcessEventData::SetUpdateStateOnRemoval (Event *event_ptr) 4725 { 4726 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4727 if (data) 4728 { 4729 data->SetUpdateStateOnRemoval(); 4730 return true; 4731 } 4732 return false; 4733 } 4734 4735 lldb::TargetSP 4736 Process::CalculateTarget () 4737 { 4738 return m_target.shared_from_this(); 4739 } 4740 4741 void 4742 Process::CalculateExecutionContext (ExecutionContext &exe_ctx) 4743 { 4744 exe_ctx.SetTargetPtr (&m_target); 4745 exe_ctx.SetProcessPtr (this); 4746 exe_ctx.SetThreadPtr(NULL); 4747 exe_ctx.SetFramePtr (NULL); 4748 } 4749 4750 //uint32_t 4751 //Process::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 4752 //{ 4753 // return 0; 4754 //} 4755 // 4756 //ArchSpec 4757 //Process::GetArchSpecForExistingProcess (lldb::pid_t pid) 4758 //{ 4759 // return Host::GetArchSpecForExistingProcess (pid); 4760 //} 4761 // 4762 //ArchSpec 4763 //Process::GetArchSpecForExistingProcess (const char *process_name) 4764 //{ 4765 // return Host::GetArchSpecForExistingProcess (process_name); 4766 //} 4767 // 4768 void 4769 Process::AppendSTDOUT (const char * s, size_t len) 4770 { 4771 Mutex::Locker locker (m_stdio_communication_mutex); 4772 m_stdout_data.append (s, len); 4773 BroadcastEventIfUnique (eBroadcastBitSTDOUT, new ProcessEventData (shared_from_this(), GetState())); 4774 } 4775 4776 void 4777 Process::AppendSTDERR (const char * s, size_t len) 4778 { 4779 Mutex::Locker locker (m_stdio_communication_mutex); 4780 m_stderr_data.append (s, len); 4781 BroadcastEventIfUnique (eBroadcastBitSTDERR, new ProcessEventData (shared_from_this(), GetState())); 4782 } 4783 4784 void 4785 Process::BroadcastAsyncProfileData(const std::string &one_profile_data) 4786 { 4787 Mutex::Locker locker (m_profile_data_comm_mutex); 4788 m_profile_data.push_back(one_profile_data); 4789 BroadcastEventIfUnique (eBroadcastBitProfileData, new ProcessEventData (shared_from_this(), GetState())); 4790 } 4791 4792 size_t 4793 Process::GetAsyncProfileData (char *buf, size_t buf_size, Error &error) 4794 { 4795 Mutex::Locker locker(m_profile_data_comm_mutex); 4796 if (m_profile_data.empty()) 4797 return 0; 4798 4799 std::string &one_profile_data = m_profile_data.front(); 4800 size_t bytes_available = one_profile_data.size(); 4801 if (bytes_available > 0) 4802 { 4803 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4804 if (log) 4805 log->Printf ("Process::GetProfileData (buf = %p, size = %" PRIu64 ")", 4806 static_cast<void*>(buf), 4807 static_cast<uint64_t>(buf_size)); 4808 if (bytes_available > buf_size) 4809 { 4810 memcpy(buf, one_profile_data.c_str(), buf_size); 4811 one_profile_data.erase(0, buf_size); 4812 bytes_available = buf_size; 4813 } 4814 else 4815 { 4816 memcpy(buf, one_profile_data.c_str(), bytes_available); 4817 m_profile_data.erase(m_profile_data.begin()); 4818 } 4819 } 4820 return bytes_available; 4821 } 4822 4823 4824 //------------------------------------------------------------------ 4825 // Process STDIO 4826 //------------------------------------------------------------------ 4827 4828 size_t 4829 Process::GetSTDOUT (char *buf, size_t buf_size, Error &error) 4830 { 4831 Mutex::Locker locker(m_stdio_communication_mutex); 4832 size_t bytes_available = m_stdout_data.size(); 4833 if (bytes_available > 0) 4834 { 4835 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4836 if (log) 4837 log->Printf ("Process::GetSTDOUT (buf = %p, size = %" PRIu64 ")", 4838 static_cast<void*>(buf), 4839 static_cast<uint64_t>(buf_size)); 4840 if (bytes_available > buf_size) 4841 { 4842 memcpy(buf, m_stdout_data.c_str(), buf_size); 4843 m_stdout_data.erase(0, buf_size); 4844 bytes_available = buf_size; 4845 } 4846 else 4847 { 4848 memcpy(buf, m_stdout_data.c_str(), bytes_available); 4849 m_stdout_data.clear(); 4850 } 4851 } 4852 return bytes_available; 4853 } 4854 4855 4856 size_t 4857 Process::GetSTDERR (char *buf, size_t buf_size, Error &error) 4858 { 4859 Mutex::Locker locker(m_stdio_communication_mutex); 4860 size_t bytes_available = m_stderr_data.size(); 4861 if (bytes_available > 0) 4862 { 4863 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4864 if (log) 4865 log->Printf ("Process::GetSTDERR (buf = %p, size = %" PRIu64 ")", 4866 static_cast<void*>(buf), 4867 static_cast<uint64_t>(buf_size)); 4868 if (bytes_available > buf_size) 4869 { 4870 memcpy(buf, m_stderr_data.c_str(), buf_size); 4871 m_stderr_data.erase(0, buf_size); 4872 bytes_available = buf_size; 4873 } 4874 else 4875 { 4876 memcpy(buf, m_stderr_data.c_str(), bytes_available); 4877 m_stderr_data.clear(); 4878 } 4879 } 4880 return bytes_available; 4881 } 4882 4883 void 4884 Process::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len) 4885 { 4886 Process *process = (Process *) baton; 4887 process->AppendSTDOUT (static_cast<const char *>(src), src_len); 4888 } 4889 4890 class IOHandlerProcessSTDIO : 4891 public IOHandler 4892 { 4893 public: 4894 IOHandlerProcessSTDIO (Process *process, 4895 int write_fd) : 4896 IOHandler(process->GetTarget().GetDebugger()), 4897 m_process (process), 4898 m_read_file (), 4899 m_write_file (write_fd, false), 4900 m_pipe () 4901 { 4902 m_read_file.SetDescriptor(GetInputFD(), false); 4903 } 4904 4905 virtual 4906 ~IOHandlerProcessSTDIO () 4907 { 4908 4909 } 4910 4911 bool 4912 OpenPipes () 4913 { 4914 if (m_pipe.IsValid()) 4915 return true; 4916 return m_pipe.Open(); 4917 } 4918 4919 void 4920 ClosePipes() 4921 { 4922 m_pipe.Close(); 4923 } 4924 4925 // Each IOHandler gets to run until it is done. It should read data 4926 // from the "in" and place output into "out" and "err and return 4927 // when done. 4928 virtual void 4929 Run () 4930 { 4931 if (m_read_file.IsValid() && m_write_file.IsValid()) 4932 { 4933 SetIsDone(false); 4934 if (OpenPipes()) 4935 { 4936 const int read_fd = m_read_file.GetDescriptor(); 4937 const int pipe_read_fd = m_pipe.GetReadFileDescriptor(); 4938 TerminalState terminal_state; 4939 terminal_state.Save (read_fd, false); 4940 Terminal terminal(read_fd); 4941 terminal.SetCanonical(false); 4942 terminal.SetEcho(false); 4943 // FD_ZERO, FD_SET are not supported on windows 4944 #ifndef _WIN32 4945 while (!GetIsDone()) 4946 { 4947 fd_set read_fdset; 4948 FD_ZERO (&read_fdset); 4949 FD_SET (read_fd, &read_fdset); 4950 FD_SET (pipe_read_fd, &read_fdset); 4951 const int nfds = std::max<int>(read_fd, pipe_read_fd) + 1; 4952 int num_set_fds = select (nfds, &read_fdset, NULL, NULL, NULL); 4953 if (num_set_fds < 0) 4954 { 4955 const int select_errno = errno; 4956 4957 if (select_errno != EINTR) 4958 SetIsDone(true); 4959 } 4960 else if (num_set_fds > 0) 4961 { 4962 char ch = 0; 4963 size_t n; 4964 if (FD_ISSET (read_fd, &read_fdset)) 4965 { 4966 n = 1; 4967 if (m_read_file.Read(&ch, n).Success() && n == 1) 4968 { 4969 if (m_write_file.Write(&ch, n).Fail() || n != 1) 4970 SetIsDone(true); 4971 } 4972 else 4973 SetIsDone(true); 4974 } 4975 if (FD_ISSET (pipe_read_fd, &read_fdset)) 4976 { 4977 // Consume the interrupt byte 4978 if (m_pipe.Read (&ch, 1) == 1) 4979 { 4980 switch (ch) 4981 { 4982 case 'q': 4983 SetIsDone(true); 4984 break; 4985 case 'i': 4986 if (StateIsRunningState(m_process->GetState())) 4987 m_process->Halt(); 4988 break; 4989 } 4990 } 4991 } 4992 } 4993 } 4994 #endif 4995 terminal_state.Restore(); 4996 4997 } 4998 else 4999 SetIsDone(true); 5000 } 5001 else 5002 SetIsDone(true); 5003 } 5004 5005 // Hide any characters that have been displayed so far so async 5006 // output can be displayed. Refresh() will be called after the 5007 // output has been displayed. 5008 virtual void 5009 Hide () 5010 { 5011 5012 } 5013 // Called when the async output has been received in order to update 5014 // the input reader (refresh the prompt and redisplay any current 5015 // line(s) that are being edited 5016 virtual void 5017 Refresh () 5018 { 5019 5020 } 5021 5022 virtual void 5023 Cancel () 5024 { 5025 char ch = 'q'; // Send 'q' for quit 5026 m_pipe.Write (&ch, 1); 5027 } 5028 5029 virtual bool 5030 Interrupt () 5031 { 5032 // Do only things that are safe to do in an interrupt context (like in 5033 // a SIGINT handler), like write 1 byte to a file descriptor. This will 5034 // interrupt the IOHandlerProcessSTDIO::Run() and we can look at the byte 5035 // that was written to the pipe and then call m_process->Halt() from a 5036 // much safer location in code. 5037 if (m_active) 5038 { 5039 char ch = 'i'; // Send 'i' for interrupt 5040 return m_pipe.Write (&ch, 1) == 1; 5041 } 5042 else 5043 { 5044 // This IOHandler might be pushed on the stack, but not being run currently 5045 // so do the right thing if we aren't actively watching for STDIN by sending 5046 // the interrupt to the process. Otherwise the write to the pipe above would 5047 // do nothing. This can happen when the command interpreter is running and 5048 // gets a "expression ...". It will be on the IOHandler thread and sending 5049 // the input is complete to the delegate which will cause the expression to 5050 // run, which will push the process IO handler, but not run it. 5051 5052 if (StateIsRunningState(m_process->GetState())) 5053 { 5054 m_process->SendAsyncInterrupt(); 5055 return true; 5056 } 5057 } 5058 return false; 5059 } 5060 5061 virtual void 5062 GotEOF() 5063 { 5064 5065 } 5066 5067 protected: 5068 Process *m_process; 5069 File m_read_file; // Read from this file (usually actual STDIN for LLDB 5070 File m_write_file; // Write to this file (usually the master pty for getting io to debuggee) 5071 Pipe m_pipe; 5072 }; 5073 5074 void 5075 Process::SetSTDIOFileDescriptor (int fd) 5076 { 5077 // First set up the Read Thread for reading/handling process I/O 5078 5079 std::unique_ptr<ConnectionFileDescriptor> conn_ap (new ConnectionFileDescriptor (fd, true)); 5080 5081 if (conn_ap.get()) 5082 { 5083 m_stdio_communication.SetConnection (conn_ap.release()); 5084 if (m_stdio_communication.IsConnected()) 5085 { 5086 m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this); 5087 m_stdio_communication.StartReadThread(); 5088 5089 // Now read thread is set up, set up input reader. 5090 5091 if (!m_process_input_reader.get()) 5092 m_process_input_reader.reset (new IOHandlerProcessSTDIO (this, fd)); 5093 } 5094 } 5095 } 5096 5097 bool 5098 Process::ProcessIOHandlerIsActive () 5099 { 5100 IOHandlerSP io_handler_sp (m_process_input_reader); 5101 if (io_handler_sp) 5102 return m_target.GetDebugger().IsTopIOHandler (io_handler_sp); 5103 return false; 5104 } 5105 bool 5106 Process::PushProcessIOHandler () 5107 { 5108 IOHandlerSP io_handler_sp (m_process_input_reader); 5109 if (io_handler_sp) 5110 { 5111 io_handler_sp->SetIsDone(false); 5112 m_target.GetDebugger().PushIOHandler (io_handler_sp); 5113 return true; 5114 } 5115 return false; 5116 } 5117 5118 bool 5119 Process::PopProcessIOHandler () 5120 { 5121 IOHandlerSP io_handler_sp (m_process_input_reader); 5122 if (io_handler_sp) 5123 return m_target.GetDebugger().PopIOHandler (io_handler_sp); 5124 return false; 5125 } 5126 5127 // The process needs to know about installed plug-ins 5128 void 5129 Process::SettingsInitialize () 5130 { 5131 Thread::SettingsInitialize (); 5132 } 5133 5134 void 5135 Process::SettingsTerminate () 5136 { 5137 Thread::SettingsTerminate (); 5138 } 5139 5140 ExpressionResults 5141 Process::RunThreadPlan (ExecutionContext &exe_ctx, 5142 lldb::ThreadPlanSP &thread_plan_sp, 5143 const EvaluateExpressionOptions &options, 5144 Stream &errors) 5145 { 5146 ExpressionResults return_value = eExpressionSetupError; 5147 5148 if (thread_plan_sp.get() == NULL) 5149 { 5150 errors.Printf("RunThreadPlan called with empty thread plan."); 5151 return eExpressionSetupError; 5152 } 5153 5154 if (!thread_plan_sp->ValidatePlan(NULL)) 5155 { 5156 errors.Printf ("RunThreadPlan called with an invalid thread plan."); 5157 return eExpressionSetupError; 5158 } 5159 5160 if (exe_ctx.GetProcessPtr() != this) 5161 { 5162 errors.Printf("RunThreadPlan called on wrong process."); 5163 return eExpressionSetupError; 5164 } 5165 5166 Thread *thread = exe_ctx.GetThreadPtr(); 5167 if (thread == NULL) 5168 { 5169 errors.Printf("RunThreadPlan called with invalid thread."); 5170 return eExpressionSetupError; 5171 } 5172 5173 // We rely on the thread plan we are running returning "PlanCompleted" if when it successfully completes. 5174 // For that to be true the plan can't be private - since private plans suppress themselves in the 5175 // GetCompletedPlan call. 5176 5177 bool orig_plan_private = thread_plan_sp->GetPrivate(); 5178 thread_plan_sp->SetPrivate(false); 5179 5180 if (m_private_state.GetValue() != eStateStopped) 5181 { 5182 errors.Printf ("RunThreadPlan called while the private state was not stopped."); 5183 return eExpressionSetupError; 5184 } 5185 5186 // Save the thread & frame from the exe_ctx for restoration after we run 5187 const uint32_t thread_idx_id = thread->GetIndexID(); 5188 StackFrameSP selected_frame_sp = thread->GetSelectedFrame(); 5189 if (!selected_frame_sp) 5190 { 5191 thread->SetSelectedFrame(0); 5192 selected_frame_sp = thread->GetSelectedFrame(); 5193 if (!selected_frame_sp) 5194 { 5195 errors.Printf("RunThreadPlan called without a selected frame on thread %d", thread_idx_id); 5196 return eExpressionSetupError; 5197 } 5198 } 5199 5200 StackID ctx_frame_id = selected_frame_sp->GetStackID(); 5201 5202 // N.B. Running the target may unset the currently selected thread and frame. We don't want to do that either, 5203 // so we should arrange to reset them as well. 5204 5205 lldb::ThreadSP selected_thread_sp = GetThreadList().GetSelectedThread(); 5206 5207 uint32_t selected_tid; 5208 StackID selected_stack_id; 5209 if (selected_thread_sp) 5210 { 5211 selected_tid = selected_thread_sp->GetIndexID(); 5212 selected_stack_id = selected_thread_sp->GetSelectedFrame()->GetStackID(); 5213 } 5214 else 5215 { 5216 selected_tid = LLDB_INVALID_THREAD_ID; 5217 } 5218 5219 HostThread backup_private_state_thread; 5220 lldb::StateType old_state = eStateInvalid; 5221 lldb::ThreadPlanSP stopper_base_plan_sp; 5222 5223 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 5224 if (m_private_state_thread.EqualsThread(Host::GetCurrentThread())) 5225 { 5226 // Yikes, we are running on the private state thread! So we can't wait for public events on this thread, since 5227 // we are the thread that is generating public events. 5228 // The simplest thing to do is to spin up a temporary thread to handle private state thread events while 5229 // we are fielding public events here. 5230 if (log) 5231 log->Printf ("Running thread plan on private state thread, spinning up another state thread to handle the events."); 5232 5233 backup_private_state_thread = m_private_state_thread; 5234 5235 // One other bit of business: we want to run just this thread plan and anything it pushes, and then stop, 5236 // returning control here. 5237 // But in the normal course of things, the plan above us on the stack would be given a shot at the stop 5238 // event before deciding to stop, and we don't want that. So we insert a "stopper" base plan on the stack 5239 // before the plan we want to run. Since base plans always stop and return control to the user, that will 5240 // do just what we want. 5241 stopper_base_plan_sp.reset(new ThreadPlanBase (*thread)); 5242 thread->QueueThreadPlan (stopper_base_plan_sp, false); 5243 // Have to make sure our public state is stopped, since otherwise the reporting logic below doesn't work correctly. 5244 old_state = m_public_state.GetValue(); 5245 m_public_state.SetValueNoLock(eStateStopped); 5246 5247 // Now spin up the private state thread: 5248 StartPrivateStateThread(true); 5249 } 5250 5251 thread->QueueThreadPlan(thread_plan_sp, false); // This used to pass "true" does that make sense? 5252 5253 if (options.GetDebug()) 5254 { 5255 // In this case, we aren't actually going to run, we just want to stop right away. 5256 // Flush this thread so we will refetch the stacks and show the correct backtrace. 5257 // FIXME: To make this prettier we should invent some stop reason for this, but that 5258 // is only cosmetic, and this functionality is only of use to lldb developers who can 5259 // live with not pretty... 5260 thread->Flush(); 5261 return eExpressionStoppedForDebug; 5262 } 5263 5264 Listener listener("lldb.process.listener.run-thread-plan"); 5265 5266 lldb::EventSP event_to_broadcast_sp; 5267 5268 { 5269 // This process event hijacker Hijacks the Public events and its destructor makes sure that the process events get 5270 // restored on exit to the function. 5271 // 5272 // If the event needs to propagate beyond the hijacker (e.g., the process exits during execution), then the event 5273 // is put into event_to_broadcast_sp for rebroadcasting. 5274 5275 ProcessEventHijacker run_thread_plan_hijacker (*this, &listener); 5276 5277 if (log) 5278 { 5279 StreamString s; 5280 thread_plan_sp->GetDescription(&s, lldb::eDescriptionLevelVerbose); 5281 log->Printf ("Process::RunThreadPlan(): Resuming thread %u - 0x%4.4" PRIx64 " to run thread plan \"%s\".", 5282 thread->GetIndexID(), 5283 thread->GetID(), 5284 s.GetData()); 5285 } 5286 5287 bool got_event; 5288 lldb::EventSP event_sp; 5289 lldb::StateType stop_state = lldb::eStateInvalid; 5290 5291 TimeValue* timeout_ptr = NULL; 5292 TimeValue real_timeout; 5293 5294 bool before_first_timeout = true; // This is set to false the first time that we have to halt the target. 5295 bool do_resume = true; 5296 bool handle_running_event = true; 5297 const uint64_t default_one_thread_timeout_usec = 250000; 5298 5299 // This is just for accounting: 5300 uint32_t num_resumes = 0; 5301 5302 uint32_t timeout_usec = options.GetTimeoutUsec(); 5303 uint32_t one_thread_timeout_usec; 5304 uint32_t all_threads_timeout_usec = 0; 5305 5306 // If we are going to run all threads the whole time, or if we are only going to run one thread, 5307 // then we don't need the first timeout. So we set the final timeout, and pretend we are after the 5308 // first timeout already. 5309 5310 if (!options.GetStopOthers() || !options.GetTryAllThreads()) 5311 { 5312 before_first_timeout = false; 5313 one_thread_timeout_usec = 0; 5314 all_threads_timeout_usec = timeout_usec; 5315 } 5316 else 5317 { 5318 uint32_t option_one_thread_timeout = options.GetOneThreadTimeoutUsec(); 5319 5320 // If the overall wait is forever, then we only need to set the one thread timeout: 5321 if (timeout_usec == 0) 5322 { 5323 if (option_one_thread_timeout != 0) 5324 one_thread_timeout_usec = option_one_thread_timeout; 5325 else 5326 one_thread_timeout_usec = default_one_thread_timeout_usec; 5327 } 5328 else 5329 { 5330 // Otherwise, if the one thread timeout is set, make sure it isn't longer than the overall timeout, 5331 // and use it, otherwise use half the total timeout, bounded by the default_one_thread_timeout_usec. 5332 uint64_t computed_one_thread_timeout; 5333 if (option_one_thread_timeout != 0) 5334 { 5335 if (timeout_usec < option_one_thread_timeout) 5336 { 5337 errors.Printf("RunThreadPlan called without one thread timeout greater than total timeout"); 5338 return eExpressionSetupError; 5339 } 5340 computed_one_thread_timeout = option_one_thread_timeout; 5341 } 5342 else 5343 { 5344 computed_one_thread_timeout = timeout_usec / 2; 5345 if (computed_one_thread_timeout > default_one_thread_timeout_usec) 5346 computed_one_thread_timeout = default_one_thread_timeout_usec; 5347 } 5348 one_thread_timeout_usec = computed_one_thread_timeout; 5349 all_threads_timeout_usec = timeout_usec - one_thread_timeout_usec; 5350 5351 } 5352 } 5353 5354 if (log) 5355 log->Printf ("Stop others: %u, try all: %u, before_first: %u, one thread: %" PRIu32 " - all threads: %" PRIu32 ".\n", 5356 options.GetStopOthers(), 5357 options.GetTryAllThreads(), 5358 before_first_timeout, 5359 one_thread_timeout_usec, 5360 all_threads_timeout_usec); 5361 5362 // This isn't going to work if there are unfetched events on the queue. 5363 // Are there cases where we might want to run the remaining events here, and then try to 5364 // call the function? That's probably being too tricky for our own good. 5365 5366 Event *other_events = listener.PeekAtNextEvent(); 5367 if (other_events != NULL) 5368 { 5369 errors.Printf("Calling RunThreadPlan with pending events on the queue."); 5370 return eExpressionSetupError; 5371 } 5372 5373 // We also need to make sure that the next event is delivered. We might be calling a function as part of 5374 // a thread plan, in which case the last delivered event could be the running event, and we don't want 5375 // event coalescing to cause us to lose OUR running event... 5376 ForceNextEventDelivery(); 5377 5378 // This while loop must exit out the bottom, there's cleanup that we need to do when we are done. 5379 // So don't call return anywhere within it. 5380 5381 #ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT 5382 // It's pretty much impossible to write test cases for things like: 5383 // One thread timeout expires, I go to halt, but the process already stopped 5384 // on the function call stop breakpoint. Turning on this define will make us not 5385 // fetch the first event till after the halt. So if you run a quick function, it will have 5386 // completed, and the completion event will be waiting, when you interrupt for halt. 5387 // The expression evaluation should still succeed. 5388 bool miss_first_event = true; 5389 #endif 5390 TimeValue one_thread_timeout; 5391 TimeValue final_timeout; 5392 5393 5394 while (1) 5395 { 5396 // We usually want to resume the process if we get to the top of the loop. 5397 // The only exception is if we get two running events with no intervening 5398 // stop, which can happen, we will just wait for then next stop event. 5399 if (log) 5400 log->Printf ("Top of while loop: do_resume: %i handle_running_event: %i before_first_timeout: %i.", 5401 do_resume, 5402 handle_running_event, 5403 before_first_timeout); 5404 5405 if (do_resume || handle_running_event) 5406 { 5407 // Do the initial resume and wait for the running event before going further. 5408 5409 if (do_resume) 5410 { 5411 num_resumes++; 5412 Error resume_error = PrivateResume (); 5413 if (!resume_error.Success()) 5414 { 5415 errors.Printf("Error resuming inferior the %d time: \"%s\".\n", 5416 num_resumes, 5417 resume_error.AsCString()); 5418 return_value = eExpressionSetupError; 5419 break; 5420 } 5421 } 5422 5423 TimeValue resume_timeout = TimeValue::Now(); 5424 resume_timeout.OffsetWithMicroSeconds(500000); 5425 5426 got_event = listener.WaitForEvent(&resume_timeout, event_sp); 5427 if (!got_event) 5428 { 5429 if (log) 5430 log->Printf ("Process::RunThreadPlan(): didn't get any event after resume %d, exiting.", 5431 num_resumes); 5432 5433 errors.Printf("Didn't get any event after resume %d, exiting.", num_resumes); 5434 return_value = eExpressionSetupError; 5435 break; 5436 } 5437 5438 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5439 5440 if (stop_state != eStateRunning) 5441 { 5442 bool restarted = false; 5443 5444 if (stop_state == eStateStopped) 5445 { 5446 restarted = Process::ProcessEventData::GetRestartedFromEvent(event_sp.get()); 5447 if (log) 5448 log->Printf("Process::RunThreadPlan(): didn't get running event after " 5449 "resume %d, got %s instead (restarted: %i, do_resume: %i, handle_running_event: %i).", 5450 num_resumes, 5451 StateAsCString(stop_state), 5452 restarted, 5453 do_resume, 5454 handle_running_event); 5455 } 5456 5457 if (restarted) 5458 { 5459 // This is probably an overabundance of caution, I don't think I should ever get a stopped & restarted 5460 // event here. But if I do, the best thing is to Halt and then get out of here. 5461 Halt(); 5462 } 5463 5464 errors.Printf("Didn't get running event after initial resume, got %s instead.", 5465 StateAsCString(stop_state)); 5466 return_value = eExpressionSetupError; 5467 break; 5468 } 5469 5470 if (log) 5471 log->PutCString ("Process::RunThreadPlan(): resuming succeeded."); 5472 // We need to call the function synchronously, so spin waiting for it to return. 5473 // If we get interrupted while executing, we're going to lose our context, and 5474 // won't be able to gather the result at this point. 5475 // We set the timeout AFTER the resume, since the resume takes some time and we 5476 // don't want to charge that to the timeout. 5477 } 5478 else 5479 { 5480 if (log) 5481 log->PutCString ("Process::RunThreadPlan(): waiting for next event."); 5482 } 5483 5484 if (before_first_timeout) 5485 { 5486 if (options.GetTryAllThreads()) 5487 { 5488 one_thread_timeout = TimeValue::Now(); 5489 one_thread_timeout.OffsetWithMicroSeconds(one_thread_timeout_usec); 5490 timeout_ptr = &one_thread_timeout; 5491 } 5492 else 5493 { 5494 if (timeout_usec == 0) 5495 timeout_ptr = NULL; 5496 else 5497 { 5498 final_timeout = TimeValue::Now(); 5499 final_timeout.OffsetWithMicroSeconds (timeout_usec); 5500 timeout_ptr = &final_timeout; 5501 } 5502 } 5503 } 5504 else 5505 { 5506 if (timeout_usec == 0) 5507 timeout_ptr = NULL; 5508 else 5509 { 5510 final_timeout = TimeValue::Now(); 5511 final_timeout.OffsetWithMicroSeconds (all_threads_timeout_usec); 5512 timeout_ptr = &final_timeout; 5513 } 5514 } 5515 5516 do_resume = true; 5517 handle_running_event = true; 5518 5519 // Now wait for the process to stop again: 5520 event_sp.reset(); 5521 5522 if (log) 5523 { 5524 if (timeout_ptr) 5525 { 5526 log->Printf ("Process::RunThreadPlan(): about to wait - now is %" PRIu64 " - endpoint is %" PRIu64, 5527 TimeValue::Now().GetAsMicroSecondsSinceJan1_1970(), 5528 timeout_ptr->GetAsMicroSecondsSinceJan1_1970()); 5529 } 5530 else 5531 { 5532 log->Printf ("Process::RunThreadPlan(): about to wait forever."); 5533 } 5534 } 5535 5536 #ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT 5537 // See comment above... 5538 if (miss_first_event) 5539 { 5540 usleep(1000); 5541 miss_first_event = false; 5542 got_event = false; 5543 } 5544 else 5545 #endif 5546 got_event = listener.WaitForEvent (timeout_ptr, event_sp); 5547 5548 if (got_event) 5549 { 5550 if (event_sp.get()) 5551 { 5552 bool keep_going = false; 5553 if (event_sp->GetType() == eBroadcastBitInterrupt) 5554 { 5555 Halt(); 5556 return_value = eExpressionInterrupted; 5557 errors.Printf ("Execution halted by user interrupt."); 5558 if (log) 5559 log->Printf ("Process::RunThreadPlan(): Got interrupted by eBroadcastBitInterrupted, exiting."); 5560 break; 5561 } 5562 else 5563 { 5564 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5565 if (log) 5566 log->Printf("Process::RunThreadPlan(): in while loop, got event: %s.", StateAsCString(stop_state)); 5567 5568 switch (stop_state) 5569 { 5570 case lldb::eStateStopped: 5571 { 5572 // We stopped, figure out what we are going to do now. 5573 ThreadSP thread_sp = GetThreadList().FindThreadByIndexID (thread_idx_id); 5574 if (!thread_sp) 5575 { 5576 // Ooh, our thread has vanished. Unlikely that this was successful execution... 5577 if (log) 5578 log->Printf ("Process::RunThreadPlan(): execution completed but our thread (index-id=%u) has vanished.", thread_idx_id); 5579 return_value = eExpressionInterrupted; 5580 } 5581 else 5582 { 5583 // If we were restarted, we just need to go back up to fetch another event. 5584 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5585 { 5586 if (log) 5587 { 5588 log->Printf ("Process::RunThreadPlan(): Got a stop and restart, so we'll continue waiting."); 5589 } 5590 keep_going = true; 5591 do_resume = false; 5592 handle_running_event = true; 5593 5594 } 5595 else 5596 { 5597 StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 5598 StopReason stop_reason = eStopReasonInvalid; 5599 if (stop_info_sp) 5600 stop_reason = stop_info_sp->GetStopReason(); 5601 5602 // FIXME: We only check if the stop reason is plan complete, should we make sure that 5603 // it is OUR plan that is complete? 5604 if (stop_reason == eStopReasonPlanComplete) 5605 { 5606 if (log) 5607 log->PutCString ("Process::RunThreadPlan(): execution completed successfully."); 5608 // Now mark this plan as private so it doesn't get reported as the stop reason 5609 // after this point. 5610 if (thread_plan_sp) 5611 thread_plan_sp->SetPrivate (orig_plan_private); 5612 return_value = eExpressionCompleted; 5613 } 5614 else 5615 { 5616 // Something restarted the target, so just wait for it to stop for real. 5617 if (stop_reason == eStopReasonBreakpoint) 5618 { 5619 if (log) 5620 log->Printf ("Process::RunThreadPlan() stopped for breakpoint: %s.", stop_info_sp->GetDescription()); 5621 return_value = eExpressionHitBreakpoint; 5622 if (!options.DoesIgnoreBreakpoints()) 5623 { 5624 event_to_broadcast_sp = event_sp; 5625 } 5626 } 5627 else 5628 { 5629 if (log) 5630 log->PutCString ("Process::RunThreadPlan(): thread plan didn't successfully complete."); 5631 if (!options.DoesUnwindOnError()) 5632 event_to_broadcast_sp = event_sp; 5633 return_value = eExpressionInterrupted; 5634 } 5635 } 5636 } 5637 } 5638 } 5639 break; 5640 5641 case lldb::eStateRunning: 5642 // This shouldn't really happen, but sometimes we do get two running events without an 5643 // intervening stop, and in that case we should just go back to waiting for the stop. 5644 do_resume = false; 5645 keep_going = true; 5646 handle_running_event = false; 5647 break; 5648 5649 default: 5650 if (log) 5651 log->Printf("Process::RunThreadPlan(): execution stopped with unexpected state: %s.", StateAsCString(stop_state)); 5652 5653 if (stop_state == eStateExited) 5654 event_to_broadcast_sp = event_sp; 5655 5656 errors.Printf ("Execution stopped with unexpected state.\n"); 5657 return_value = eExpressionInterrupted; 5658 break; 5659 } 5660 } 5661 5662 if (keep_going) 5663 continue; 5664 else 5665 break; 5666 } 5667 else 5668 { 5669 if (log) 5670 log->PutCString ("Process::RunThreadPlan(): got_event was true, but the event pointer was null. How odd..."); 5671 return_value = eExpressionInterrupted; 5672 break; 5673 } 5674 } 5675 else 5676 { 5677 // If we didn't get an event that means we've timed out... 5678 // We will interrupt the process here. Depending on what we were asked to do we will 5679 // either exit, or try with all threads running for the same timeout. 5680 5681 if (log) { 5682 if (options.GetTryAllThreads()) 5683 { 5684 if (before_first_timeout) 5685 { 5686 if (timeout_usec != 0) 5687 { 5688 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5689 "running for %" PRIu32 " usec with all threads enabled.", 5690 all_threads_timeout_usec); 5691 } 5692 else 5693 { 5694 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5695 "running forever with all threads enabled."); 5696 } 5697 } 5698 else 5699 log->Printf ("Process::RunThreadPlan(): Restarting function with all threads enabled " 5700 "and timeout: %u timed out, abandoning execution.", 5701 timeout_usec); 5702 } 5703 else 5704 log->Printf ("Process::RunThreadPlan(): Running function with timeout: %u timed out, " 5705 "abandoning execution.", 5706 timeout_usec); 5707 } 5708 5709 // It is possible that between the time we issued the Halt, and we get around to calling Halt the target 5710 // could have stopped. That's fine, Halt will figure that out and send the appropriate Stopped event. 5711 // BUT it is also possible that we stopped & restarted (e.g. hit a signal with "stop" set to false.) In 5712 // that case, we'll get the stopped & restarted event, and we should go back to waiting for the Halt's 5713 // stopped event. That's what this while loop does. 5714 5715 bool back_to_top = true; 5716 uint32_t try_halt_again = 0; 5717 bool do_halt = true; 5718 const uint32_t num_retries = 5; 5719 while (try_halt_again < num_retries) 5720 { 5721 Error halt_error; 5722 if (do_halt) 5723 { 5724 if (log) 5725 log->Printf ("Process::RunThreadPlan(): Running Halt."); 5726 halt_error = Halt(); 5727 } 5728 if (halt_error.Success()) 5729 { 5730 if (log) 5731 log->PutCString ("Process::RunThreadPlan(): Halt succeeded."); 5732 5733 real_timeout = TimeValue::Now(); 5734 real_timeout.OffsetWithMicroSeconds(500000); 5735 5736 got_event = listener.WaitForEvent(&real_timeout, event_sp); 5737 5738 if (got_event) 5739 { 5740 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5741 if (log) 5742 { 5743 log->Printf ("Process::RunThreadPlan(): Stopped with event: %s", StateAsCString(stop_state)); 5744 if (stop_state == lldb::eStateStopped 5745 && Process::ProcessEventData::GetInterruptedFromEvent(event_sp.get())) 5746 log->PutCString (" Event was the Halt interruption event."); 5747 } 5748 5749 if (stop_state == lldb::eStateStopped) 5750 { 5751 // Between the time we initiated the Halt and the time we delivered it, the process could have 5752 // already finished its job. Check that here: 5753 5754 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 5755 { 5756 if (log) 5757 log->PutCString ("Process::RunThreadPlan(): Even though we timed out, the call plan was done. " 5758 "Exiting wait loop."); 5759 return_value = eExpressionCompleted; 5760 back_to_top = false; 5761 break; 5762 } 5763 5764 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5765 { 5766 if (log) 5767 log->PutCString ("Process::RunThreadPlan(): Went to halt but got a restarted event, there must be an un-restarted stopped event so try again... " 5768 "Exiting wait loop."); 5769 try_halt_again++; 5770 do_halt = false; 5771 continue; 5772 } 5773 5774 if (!options.GetTryAllThreads()) 5775 { 5776 if (log) 5777 log->PutCString ("Process::RunThreadPlan(): try_all_threads was false, we stopped so now we're quitting."); 5778 return_value = eExpressionInterrupted; 5779 back_to_top = false; 5780 break; 5781 } 5782 5783 if (before_first_timeout) 5784 { 5785 // Set all the other threads to run, and return to the top of the loop, which will continue; 5786 before_first_timeout = false; 5787 thread_plan_sp->SetStopOthers (false); 5788 if (log) 5789 log->PutCString ("Process::RunThreadPlan(): about to resume."); 5790 5791 back_to_top = true; 5792 break; 5793 } 5794 else 5795 { 5796 // Running all threads failed, so return Interrupted. 5797 if (log) 5798 log->PutCString("Process::RunThreadPlan(): running all threads timed out."); 5799 return_value = eExpressionInterrupted; 5800 back_to_top = false; 5801 break; 5802 } 5803 } 5804 } 5805 else 5806 { if (log) 5807 log->PutCString("Process::RunThreadPlan(): halt said it succeeded, but I got no event. " 5808 "I'm getting out of here passing Interrupted."); 5809 return_value = eExpressionInterrupted; 5810 back_to_top = false; 5811 break; 5812 } 5813 } 5814 else 5815 { 5816 try_halt_again++; 5817 continue; 5818 } 5819 } 5820 5821 if (!back_to_top || try_halt_again > num_retries) 5822 break; 5823 else 5824 continue; 5825 } 5826 } // END WAIT LOOP 5827 5828 // If we had to start up a temporary private state thread to run this thread plan, shut it down now. 5829 if (backup_private_state_thread.IsJoinable()) 5830 { 5831 StopPrivateStateThread(); 5832 Error error; 5833 m_private_state_thread = backup_private_state_thread; 5834 if (stopper_base_plan_sp) 5835 { 5836 thread->DiscardThreadPlansUpToPlan(stopper_base_plan_sp); 5837 } 5838 if (old_state != eStateInvalid) 5839 m_public_state.SetValueNoLock(old_state); 5840 } 5841 5842 // Restore the thread state if we are going to discard the plan execution. There are three cases where this 5843 // could happen: 5844 // 1) The execution successfully completed 5845 // 2) We hit a breakpoint, and ignore_breakpoints was true 5846 // 3) We got some other error, and discard_on_error was true 5847 bool should_unwind = (return_value == eExpressionInterrupted && options.DoesUnwindOnError()) 5848 || (return_value == eExpressionHitBreakpoint && options.DoesIgnoreBreakpoints()); 5849 5850 if (return_value == eExpressionCompleted 5851 || should_unwind) 5852 { 5853 thread_plan_sp->RestoreThreadState(); 5854 } 5855 5856 // Now do some processing on the results of the run: 5857 if (return_value == eExpressionInterrupted || return_value == eExpressionHitBreakpoint) 5858 { 5859 if (log) 5860 { 5861 StreamString s; 5862 if (event_sp) 5863 event_sp->Dump (&s); 5864 else 5865 { 5866 log->PutCString ("Process::RunThreadPlan(): Stop event that interrupted us is NULL."); 5867 } 5868 5869 StreamString ts; 5870 5871 const char *event_explanation = NULL; 5872 5873 do 5874 { 5875 if (!event_sp) 5876 { 5877 event_explanation = "<no event>"; 5878 break; 5879 } 5880 else if (event_sp->GetType() == eBroadcastBitInterrupt) 5881 { 5882 event_explanation = "<user interrupt>"; 5883 break; 5884 } 5885 else 5886 { 5887 const Process::ProcessEventData *event_data = Process::ProcessEventData::GetEventDataFromEvent (event_sp.get()); 5888 5889 if (!event_data) 5890 { 5891 event_explanation = "<no event data>"; 5892 break; 5893 } 5894 5895 Process *process = event_data->GetProcessSP().get(); 5896 5897 if (!process) 5898 { 5899 event_explanation = "<no process>"; 5900 break; 5901 } 5902 5903 ThreadList &thread_list = process->GetThreadList(); 5904 5905 uint32_t num_threads = thread_list.GetSize(); 5906 uint32_t thread_index; 5907 5908 ts.Printf("<%u threads> ", num_threads); 5909 5910 for (thread_index = 0; 5911 thread_index < num_threads; 5912 ++thread_index) 5913 { 5914 Thread *thread = thread_list.GetThreadAtIndex(thread_index).get(); 5915 5916 if (!thread) 5917 { 5918 ts.Printf("<?> "); 5919 continue; 5920 } 5921 5922 ts.Printf("<0x%4.4" PRIx64 " ", thread->GetID()); 5923 RegisterContext *register_context = thread->GetRegisterContext().get(); 5924 5925 if (register_context) 5926 ts.Printf("[ip 0x%" PRIx64 "] ", register_context->GetPC()); 5927 else 5928 ts.Printf("[ip unknown] "); 5929 5930 lldb::StopInfoSP stop_info_sp = thread->GetStopInfo(); 5931 if (stop_info_sp) 5932 { 5933 const char *stop_desc = stop_info_sp->GetDescription(); 5934 if (stop_desc) 5935 ts.PutCString (stop_desc); 5936 } 5937 ts.Printf(">"); 5938 } 5939 5940 event_explanation = ts.GetData(); 5941 } 5942 } while (0); 5943 5944 if (event_explanation) 5945 log->Printf("Process::RunThreadPlan(): execution interrupted: %s %s", s.GetData(), event_explanation); 5946 else 5947 log->Printf("Process::RunThreadPlan(): execution interrupted: %s", s.GetData()); 5948 } 5949 5950 if (should_unwind) 5951 { 5952 if (log) 5953 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - discarding thread plans up to %p.", 5954 static_cast<void*>(thread_plan_sp.get())); 5955 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 5956 thread_plan_sp->SetPrivate (orig_plan_private); 5957 } 5958 else 5959 { 5960 if (log) 5961 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - for plan: %p not discarding.", 5962 static_cast<void*>(thread_plan_sp.get())); 5963 } 5964 } 5965 else if (return_value == eExpressionSetupError) 5966 { 5967 if (log) 5968 log->PutCString("Process::RunThreadPlan(): execution set up error."); 5969 5970 if (options.DoesUnwindOnError()) 5971 { 5972 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 5973 thread_plan_sp->SetPrivate (orig_plan_private); 5974 } 5975 } 5976 else 5977 { 5978 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 5979 { 5980 if (log) 5981 log->PutCString("Process::RunThreadPlan(): thread plan is done"); 5982 return_value = eExpressionCompleted; 5983 } 5984 else if (thread->WasThreadPlanDiscarded (thread_plan_sp.get())) 5985 { 5986 if (log) 5987 log->PutCString("Process::RunThreadPlan(): thread plan was discarded"); 5988 return_value = eExpressionDiscarded; 5989 } 5990 else 5991 { 5992 if (log) 5993 log->PutCString("Process::RunThreadPlan(): thread plan stopped in mid course"); 5994 if (options.DoesUnwindOnError() && thread_plan_sp) 5995 { 5996 if (log) 5997 log->PutCString("Process::RunThreadPlan(): discarding thread plan 'cause unwind_on_error is set."); 5998 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 5999 thread_plan_sp->SetPrivate (orig_plan_private); 6000 } 6001 } 6002 } 6003 6004 // Thread we ran the function in may have gone away because we ran the target 6005 // Check that it's still there, and if it is put it back in the context. Also restore the 6006 // frame in the context if it is still present. 6007 thread = GetThreadList().FindThreadByIndexID(thread_idx_id, true).get(); 6008 if (thread) 6009 { 6010 exe_ctx.SetFrameSP (thread->GetFrameWithStackID (ctx_frame_id)); 6011 } 6012 6013 // Also restore the current process'es selected frame & thread, since this function calling may 6014 // be done behind the user's back. 6015 6016 if (selected_tid != LLDB_INVALID_THREAD_ID) 6017 { 6018 if (GetThreadList().SetSelectedThreadByIndexID (selected_tid) && selected_stack_id.IsValid()) 6019 { 6020 // We were able to restore the selected thread, now restore the frame: 6021 Mutex::Locker lock(GetThreadList().GetMutex()); 6022 StackFrameSP old_frame_sp = GetThreadList().GetSelectedThread()->GetFrameWithStackID(selected_stack_id); 6023 if (old_frame_sp) 6024 GetThreadList().GetSelectedThread()->SetSelectedFrame(old_frame_sp.get()); 6025 } 6026 } 6027 } 6028 6029 // If the process exited during the run of the thread plan, notify everyone. 6030 6031 if (event_to_broadcast_sp) 6032 { 6033 if (log) 6034 log->PutCString("Process::RunThreadPlan(): rebroadcasting event."); 6035 BroadcastEvent(event_to_broadcast_sp); 6036 } 6037 6038 return return_value; 6039 } 6040 6041 const char * 6042 Process::ExecutionResultAsCString (ExpressionResults result) 6043 { 6044 const char *result_name; 6045 6046 switch (result) 6047 { 6048 case eExpressionCompleted: 6049 result_name = "eExpressionCompleted"; 6050 break; 6051 case eExpressionDiscarded: 6052 result_name = "eExpressionDiscarded"; 6053 break; 6054 case eExpressionInterrupted: 6055 result_name = "eExpressionInterrupted"; 6056 break; 6057 case eExpressionHitBreakpoint: 6058 result_name = "eExpressionHitBreakpoint"; 6059 break; 6060 case eExpressionSetupError: 6061 result_name = "eExpressionSetupError"; 6062 break; 6063 case eExpressionParseError: 6064 result_name = "eExpressionParseError"; 6065 break; 6066 case eExpressionResultUnavailable: 6067 result_name = "eExpressionResultUnavailable"; 6068 break; 6069 case eExpressionTimedOut: 6070 result_name = "eExpressionTimedOut"; 6071 break; 6072 case eExpressionStoppedForDebug: 6073 result_name = "eExpressionStoppedForDebug"; 6074 break; 6075 } 6076 return result_name; 6077 } 6078 6079 void 6080 Process::GetStatus (Stream &strm) 6081 { 6082 const StateType state = GetState(); 6083 if (StateIsStoppedState(state, false)) 6084 { 6085 if (state == eStateExited) 6086 { 6087 int exit_status = GetExitStatus(); 6088 const char *exit_description = GetExitDescription(); 6089 strm.Printf ("Process %" PRIu64 " exited with status = %i (0x%8.8x) %s\n", 6090 GetID(), 6091 exit_status, 6092 exit_status, 6093 exit_description ? exit_description : ""); 6094 } 6095 else 6096 { 6097 if (state == eStateConnected) 6098 strm.Printf ("Connected to remote target.\n"); 6099 else 6100 strm.Printf ("Process %" PRIu64 " %s\n", GetID(), StateAsCString (state)); 6101 } 6102 } 6103 else 6104 { 6105 strm.Printf ("Process %" PRIu64 " is running.\n", GetID()); 6106 } 6107 } 6108 6109 size_t 6110 Process::GetThreadStatus (Stream &strm, 6111 bool only_threads_with_stop_reason, 6112 uint32_t start_frame, 6113 uint32_t num_frames, 6114 uint32_t num_frames_with_source) 6115 { 6116 size_t num_thread_infos_dumped = 0; 6117 6118 // You can't hold the thread list lock while calling Thread::GetStatus. That very well might run code (e.g. if we need it 6119 // to get return values or arguments.) For that to work the process has to be able to acquire it. So instead copy the thread 6120 // ID's, and look them up one by one: 6121 6122 uint32_t num_threads; 6123 std::vector<uint32_t> thread_index_array; 6124 //Scope for thread list locker; 6125 { 6126 Mutex::Locker locker (GetThreadList().GetMutex()); 6127 ThreadList &curr_thread_list = GetThreadList(); 6128 num_threads = curr_thread_list.GetSize(); 6129 uint32_t idx; 6130 thread_index_array.resize(num_threads); 6131 for (idx = 0; idx < num_threads; ++idx) 6132 thread_index_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetID(); 6133 } 6134 6135 for (uint32_t i = 0; i < num_threads; i++) 6136 { 6137 ThreadSP thread_sp(GetThreadList().FindThreadByID(thread_index_array[i])); 6138 if (thread_sp) 6139 { 6140 if (only_threads_with_stop_reason) 6141 { 6142 StopInfoSP stop_info_sp = thread_sp->GetStopInfo(); 6143 if (stop_info_sp.get() == NULL || !stop_info_sp->IsValid()) 6144 continue; 6145 } 6146 thread_sp->GetStatus (strm, 6147 start_frame, 6148 num_frames, 6149 num_frames_with_source); 6150 ++num_thread_infos_dumped; 6151 } 6152 else 6153 { 6154 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 6155 if (log) 6156 log->Printf("Process::GetThreadStatus - thread 0x" PRIu64 " vanished while running Thread::GetStatus."); 6157 6158 } 6159 } 6160 return num_thread_infos_dumped; 6161 } 6162 6163 void 6164 Process::AddInvalidMemoryRegion (const LoadRange ®ion) 6165 { 6166 m_memory_cache.AddInvalidRange(region.GetRangeBase(), region.GetByteSize()); 6167 } 6168 6169 bool 6170 Process::RemoveInvalidMemoryRange (const LoadRange ®ion) 6171 { 6172 return m_memory_cache.RemoveInvalidRange(region.GetRangeBase(), region.GetByteSize()); 6173 } 6174 6175 void 6176 Process::AddPreResumeAction (PreResumeActionCallback callback, void *baton) 6177 { 6178 m_pre_resume_actions.push_back(PreResumeCallbackAndBaton (callback, baton)); 6179 } 6180 6181 bool 6182 Process::RunPreResumeActions () 6183 { 6184 bool result = true; 6185 while (!m_pre_resume_actions.empty()) 6186 { 6187 struct PreResumeCallbackAndBaton action = m_pre_resume_actions.back(); 6188 m_pre_resume_actions.pop_back(); 6189 bool this_result = action.callback (action.baton); 6190 if (result == true) result = this_result; 6191 } 6192 return result; 6193 } 6194 6195 void 6196 Process::ClearPreResumeActions () 6197 { 6198 m_pre_resume_actions.clear(); 6199 } 6200 6201 void 6202 Process::Flush () 6203 { 6204 m_thread_list.Flush(); 6205 m_extended_thread_list.Flush(); 6206 m_extended_thread_stop_id = 0; 6207 m_queue_list.Clear(); 6208 m_queue_list_stop_id = 0; 6209 } 6210 6211 void 6212 Process::DidExec () 6213 { 6214 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 6215 if (log) 6216 log->Printf ("Process::%s()", __FUNCTION__); 6217 6218 Target &target = GetTarget(); 6219 target.CleanupProcess (); 6220 target.ClearModules(false); 6221 m_dynamic_checkers_ap.reset(); 6222 m_abi_sp.reset(); 6223 m_system_runtime_ap.reset(); 6224 m_os_ap.reset(); 6225 m_dyld_ap.reset(); 6226 m_jit_loaders_ap.reset(); 6227 m_image_tokens.clear(); 6228 m_allocated_memory_cache.Clear(); 6229 m_language_runtimes.clear(); 6230 m_instrumentation_runtimes.clear(); 6231 m_thread_list.DiscardThreadPlans(); 6232 m_memory_cache.Clear(true); 6233 DoDidExec(); 6234 CompleteAttach (); 6235 // Flush the process (threads and all stack frames) after running CompleteAttach() 6236 // in case the dynamic loader loaded things in new locations. 6237 Flush(); 6238 6239 // After we figure out what was loaded/unloaded in CompleteAttach, 6240 // we need to let the target know so it can do any cleanup it needs to. 6241 target.DidExec(); 6242 } 6243 6244 addr_t 6245 Process::ResolveIndirectFunction(const Address *address, Error &error) 6246 { 6247 if (address == nullptr) 6248 { 6249 error.SetErrorString("Invalid address argument"); 6250 return LLDB_INVALID_ADDRESS; 6251 } 6252 6253 addr_t function_addr = LLDB_INVALID_ADDRESS; 6254 6255 addr_t addr = address->GetLoadAddress(&GetTarget()); 6256 std::map<addr_t,addr_t>::const_iterator iter = m_resolved_indirect_addresses.find(addr); 6257 if (iter != m_resolved_indirect_addresses.end()) 6258 { 6259 function_addr = (*iter).second; 6260 } 6261 else 6262 { 6263 if (!InferiorCall(this, address, function_addr)) 6264 { 6265 Symbol *symbol = address->CalculateSymbolContextSymbol(); 6266 error.SetErrorStringWithFormat ("Unable to call resolver for indirect function %s", 6267 symbol ? symbol->GetName().AsCString() : "<UNKNOWN>"); 6268 function_addr = LLDB_INVALID_ADDRESS; 6269 } 6270 else 6271 { 6272 m_resolved_indirect_addresses.insert(std::pair<addr_t, addr_t>(addr, function_addr)); 6273 } 6274 } 6275 return function_addr; 6276 } 6277 6278 void 6279 Process::ModulesDidLoad (ModuleList &module_list) 6280 { 6281 SystemRuntime *sys_runtime = GetSystemRuntime(); 6282 if (sys_runtime) 6283 { 6284 sys_runtime->ModulesDidLoad (module_list); 6285 } 6286 6287 GetJITLoaders().ModulesDidLoad (module_list); 6288 6289 // Give runtimes a chance to be created. 6290 InstrumentationRuntime::ModulesDidLoad(module_list, this, m_instrumentation_runtimes); 6291 6292 // Tell runtimes about new modules. 6293 for (auto pos = m_instrumentation_runtimes.begin(); pos != m_instrumentation_runtimes.end(); ++pos) 6294 { 6295 InstrumentationRuntimeSP runtime = pos->second; 6296 runtime->ModulesDidLoad(module_list); 6297 } 6298 6299 } 6300 6301 ThreadCollectionSP 6302 Process::GetHistoryThreads(lldb::addr_t addr) 6303 { 6304 ThreadCollectionSP threads; 6305 6306 const MemoryHistorySP &memory_history = MemoryHistory::FindPlugin(shared_from_this()); 6307 6308 if (! memory_history.get()) { 6309 return threads; 6310 } 6311 6312 threads.reset(new ThreadCollection(memory_history->GetHistoryThreads(addr))); 6313 6314 return threads; 6315 } 6316 6317 InstrumentationRuntimeSP 6318 Process::GetInstrumentationRuntime(lldb::InstrumentationRuntimeType type) 6319 { 6320 InstrumentationRuntimeCollection::iterator pos; 6321 pos = m_instrumentation_runtimes.find (type); 6322 if (pos == m_instrumentation_runtimes.end()) 6323 { 6324 return InstrumentationRuntimeSP(); 6325 } 6326 else 6327 return (*pos).second; 6328 } 6329