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/Target/Process.h" 11 #include "lldb/Breakpoint/StoppointCallbackContext.h" 12 #include "lldb/Breakpoint/BreakpointLocation.h" 13 #include "lldb/Core/Event.h" 14 #include "lldb/Core/Debugger.h" 15 #include "lldb/Core/Log.h" 16 #include "lldb/Core/Module.h" 17 #include "lldb/Core/ModuleSpec.h" 18 #include "lldb/Core/PluginManager.h" 19 #include "lldb/Core/State.h" 20 #include "lldb/Core/StreamFile.h" 21 #include "lldb/Expression/UserExpression.h" 22 #include "lldb/Expression/IRDynamicChecks.h" 23 #include "lldb/Host/ConnectionFileDescriptor.h" 24 #include "lldb/Host/Host.h" 25 #include "lldb/Host/HostInfo.h" 26 #include "lldb/Host/Pipe.h" 27 #include "lldb/Host/Terminal.h" 28 #include "lldb/Host/ThreadLauncher.h" 29 #include "lldb/Interpreter/CommandInterpreter.h" 30 #include "lldb/Interpreter/OptionValueProperties.h" 31 #include "lldb/Symbol/Function.h" 32 #include "lldb/Symbol/Symbol.h" 33 #include "lldb/Target/ABI.h" 34 #include "lldb/Target/DynamicLoader.h" 35 #include "lldb/Target/InstrumentationRuntime.h" 36 #include "lldb/Target/JITLoader.h" 37 #include "lldb/Target/JITLoaderList.h" 38 #include "lldb/Target/MemoryHistory.h" 39 #include "lldb/Target/MemoryRegionInfo.h" 40 #include "lldb/Target/OperatingSystem.h" 41 #include "lldb/Target/LanguageRuntime.h" 42 #include "lldb/Target/CPPLanguageRuntime.h" 43 #include "lldb/Target/ObjCLanguageRuntime.h" 44 #include "lldb/Target/Platform.h" 45 #include "lldb/Target/RegisterContext.h" 46 #include "lldb/Target/StopInfo.h" 47 #include "lldb/Target/SystemRuntime.h" 48 #include "lldb/Target/Target.h" 49 #include "lldb/Target/TargetList.h" 50 #include "lldb/Target/Thread.h" 51 #include "lldb/Target/ThreadPlan.h" 52 #include "lldb/Target/ThreadPlanBase.h" 53 #include "lldb/Target/UnixSignals.h" 54 #include "lldb/Utility/NameMatches.h" 55 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 56 57 using namespace lldb; 58 using namespace lldb_private; 59 60 61 // Comment out line below to disable memory caching, overriding the process setting 62 // target.process.disable-memory-cache 63 #define ENABLE_MEMORY_CACHING 64 65 #ifdef ENABLE_MEMORY_CACHING 66 #define DISABLE_MEM_CACHE_DEFAULT false 67 #else 68 #define DISABLE_MEM_CACHE_DEFAULT true 69 #endif 70 71 class ProcessOptionValueProperties : public OptionValueProperties 72 { 73 public: 74 ProcessOptionValueProperties (const ConstString &name) : 75 OptionValueProperties (name) 76 { 77 } 78 79 // This constructor is used when creating ProcessOptionValueProperties when it 80 // is part of a new lldb_private::Process instance. It will copy all current 81 // global property values as needed 82 ProcessOptionValueProperties (ProcessProperties *global_properties) : 83 OptionValueProperties(*global_properties->GetValueProperties()) 84 { 85 } 86 87 virtual const Property * 88 GetPropertyAtIndex (const ExecutionContext *exe_ctx, bool will_modify, uint32_t idx) const 89 { 90 // When getting the value for a key from the process options, we will always 91 // try and grab the setting from the current process if there is one. Else we just 92 // use the one from this instance. 93 if (exe_ctx) 94 { 95 Process *process = exe_ctx->GetProcessPtr(); 96 if (process) 97 { 98 ProcessOptionValueProperties *instance_properties = static_cast<ProcessOptionValueProperties *>(process->GetValueProperties().get()); 99 if (this != instance_properties) 100 return instance_properties->ProtectedGetPropertyAtIndex (idx); 101 } 102 } 103 return ProtectedGetPropertyAtIndex (idx); 104 } 105 }; 106 107 static PropertyDefinition 108 g_properties[] = 109 { 110 { "disable-memory-cache" , OptionValue::eTypeBoolean, false, DISABLE_MEM_CACHE_DEFAULT, NULL, NULL, "Disable reading and caching of memory in fixed-size units." }, 111 { "extra-startup-command", OptionValue::eTypeArray , false, OptionValue::eTypeString, NULL, NULL, "A list containing extra commands understood by the particular process plugin used. " 112 "For instance, to turn on debugserver logging set this to \"QSetLogging:bitmask=LOG_DEFAULT;\"" }, 113 { "ignore-breakpoints-in-expressions", OptionValue::eTypeBoolean, true, true, NULL, NULL, "If true, breakpoints will be ignored during expression evaluation." }, 114 { "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." }, 115 { "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." }, 116 { "stop-on-sharedlibrary-events" , OptionValue::eTypeBoolean, true, false, NULL, NULL, "If true, stop when a shared library is loaded or unloaded." }, 117 { "detach-keeps-stopped" , OptionValue::eTypeBoolean, true, false, NULL, NULL, "If true, detach will attempt to keep the process stopped." }, 118 { "memory-cache-line-size" , OptionValue::eTypeUInt64, false, 512, NULL, NULL, "The memory cache line size" }, 119 { "optimization-warnings" , OptionValue::eTypeBoolean, false, true, NULL, NULL, "If true, warn when stopped in code that is optimized where stepping and variable availability may not behave as expected." }, 120 { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } 121 }; 122 123 enum { 124 ePropertyDisableMemCache, 125 ePropertyExtraStartCommand, 126 ePropertyIgnoreBreakpointsInExpressions, 127 ePropertyUnwindOnErrorInExpressions, 128 ePropertyPythonOSPluginPath, 129 ePropertyStopOnSharedLibraryEvents, 130 ePropertyDetachKeepsStopped, 131 ePropertyMemCacheLineSize, 132 ePropertyWarningOptimization 133 }; 134 135 ProcessProperties::ProcessProperties (lldb_private::Process *process) : 136 Properties (), 137 m_process (process) // Can be NULL for global ProcessProperties 138 { 139 if (process == NULL) 140 { 141 // Global process properties, set them up one time 142 m_collection_sp.reset (new ProcessOptionValueProperties(ConstString("process"))); 143 m_collection_sp->Initialize(g_properties); 144 m_collection_sp->AppendProperty(ConstString("thread"), 145 ConstString("Settings specific to threads."), 146 true, 147 Thread::GetGlobalProperties()->GetValueProperties()); 148 } 149 else 150 { 151 m_collection_sp.reset (new ProcessOptionValueProperties(Process::GetGlobalProperties().get())); 152 m_collection_sp->SetValueChangedCallback(ePropertyPythonOSPluginPath, ProcessProperties::OptionValueChangedCallback, this); 153 } 154 } 155 156 ProcessProperties::~ProcessProperties() 157 { 158 } 159 160 void 161 ProcessProperties::OptionValueChangedCallback (void *baton, OptionValue *option_value) 162 { 163 ProcessProperties *properties = (ProcessProperties *)baton; 164 if (properties->m_process) 165 properties->m_process->LoadOperatingSystemPlugin(true); 166 } 167 168 bool 169 ProcessProperties::GetDisableMemoryCache() const 170 { 171 const uint32_t idx = ePropertyDisableMemCache; 172 return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0); 173 } 174 175 uint64_t 176 ProcessProperties::GetMemoryCacheLineSize() const 177 { 178 const uint32_t idx = ePropertyMemCacheLineSize; 179 return m_collection_sp->GetPropertyAtIndexAsUInt64 (NULL, idx, g_properties[idx].default_uint_value); 180 } 181 182 Args 183 ProcessProperties::GetExtraStartupCommands () const 184 { 185 Args args; 186 const uint32_t idx = ePropertyExtraStartCommand; 187 m_collection_sp->GetPropertyAtIndexAsArgs(NULL, idx, args); 188 return args; 189 } 190 191 void 192 ProcessProperties::SetExtraStartupCommands (const Args &args) 193 { 194 const uint32_t idx = ePropertyExtraStartCommand; 195 m_collection_sp->SetPropertyAtIndexFromArgs(NULL, idx, args); 196 } 197 198 FileSpec 199 ProcessProperties::GetPythonOSPluginPath () const 200 { 201 const uint32_t idx = ePropertyPythonOSPluginPath; 202 return m_collection_sp->GetPropertyAtIndexAsFileSpec(NULL, idx); 203 } 204 205 void 206 ProcessProperties::SetPythonOSPluginPath (const FileSpec &file) 207 { 208 const uint32_t idx = ePropertyPythonOSPluginPath; 209 m_collection_sp->SetPropertyAtIndexAsFileSpec(NULL, idx, file); 210 } 211 212 213 bool 214 ProcessProperties::GetIgnoreBreakpointsInExpressions () const 215 { 216 const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions; 217 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 218 } 219 220 void 221 ProcessProperties::SetIgnoreBreakpointsInExpressions (bool ignore) 222 { 223 const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions; 224 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, ignore); 225 } 226 227 bool 228 ProcessProperties::GetUnwindOnErrorInExpressions () const 229 { 230 const uint32_t idx = ePropertyUnwindOnErrorInExpressions; 231 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 232 } 233 234 void 235 ProcessProperties::SetUnwindOnErrorInExpressions (bool ignore) 236 { 237 const uint32_t idx = ePropertyUnwindOnErrorInExpressions; 238 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, ignore); 239 } 240 241 bool 242 ProcessProperties::GetStopOnSharedLibraryEvents () const 243 { 244 const uint32_t idx = ePropertyStopOnSharedLibraryEvents; 245 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 246 } 247 248 void 249 ProcessProperties::SetStopOnSharedLibraryEvents (bool stop) 250 { 251 const uint32_t idx = ePropertyStopOnSharedLibraryEvents; 252 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, stop); 253 } 254 255 bool 256 ProcessProperties::GetDetachKeepsStopped () const 257 { 258 const uint32_t idx = ePropertyDetachKeepsStopped; 259 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 260 } 261 262 void 263 ProcessProperties::SetDetachKeepsStopped (bool stop) 264 { 265 const uint32_t idx = ePropertyDetachKeepsStopped; 266 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, stop); 267 } 268 269 bool 270 ProcessProperties::GetWarningsOptimization () const 271 { 272 const uint32_t idx = ePropertyWarningOptimization; 273 return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0); 274 } 275 276 void 277 ProcessInstanceInfo::Dump (Stream &s, Platform *platform) const 278 { 279 const char *cstr; 280 if (m_pid != LLDB_INVALID_PROCESS_ID) 281 s.Printf (" pid = %" PRIu64 "\n", m_pid); 282 283 if (m_parent_pid != LLDB_INVALID_PROCESS_ID) 284 s.Printf (" parent = %" PRIu64 "\n", m_parent_pid); 285 286 if (m_executable) 287 { 288 s.Printf (" name = %s\n", m_executable.GetFilename().GetCString()); 289 s.PutCString (" file = "); 290 m_executable.Dump(&s); 291 s.EOL(); 292 } 293 const uint32_t argc = m_arguments.GetArgumentCount(); 294 if (argc > 0) 295 { 296 for (uint32_t i=0; i<argc; i++) 297 { 298 const char *arg = m_arguments.GetArgumentAtIndex(i); 299 if (i < 10) 300 s.Printf (" arg[%u] = %s\n", i, arg); 301 else 302 s.Printf ("arg[%u] = %s\n", i, arg); 303 } 304 } 305 306 const uint32_t envc = m_environment.GetArgumentCount(); 307 if (envc > 0) 308 { 309 for (uint32_t i=0; i<envc; i++) 310 { 311 const char *env = m_environment.GetArgumentAtIndex(i); 312 if (i < 10) 313 s.Printf (" env[%u] = %s\n", i, env); 314 else 315 s.Printf ("env[%u] = %s\n", i, env); 316 } 317 } 318 319 if (m_arch.IsValid()) 320 s.Printf (" arch = %s\n", m_arch.GetTriple().str().c_str()); 321 322 if (m_uid != UINT32_MAX) 323 { 324 cstr = platform->GetUserName (m_uid); 325 s.Printf (" uid = %-5u (%s)\n", m_uid, cstr ? cstr : ""); 326 } 327 if (m_gid != UINT32_MAX) 328 { 329 cstr = platform->GetGroupName (m_gid); 330 s.Printf (" gid = %-5u (%s)\n", m_gid, cstr ? cstr : ""); 331 } 332 if (m_euid != UINT32_MAX) 333 { 334 cstr = platform->GetUserName (m_euid); 335 s.Printf (" euid = %-5u (%s)\n", m_euid, cstr ? cstr : ""); 336 } 337 if (m_egid != UINT32_MAX) 338 { 339 cstr = platform->GetGroupName (m_egid); 340 s.Printf (" egid = %-5u (%s)\n", m_egid, cstr ? cstr : ""); 341 } 342 } 343 344 void 345 ProcessInstanceInfo::DumpTableHeader (Stream &s, Platform *platform, bool show_args, bool verbose) 346 { 347 const char *label; 348 if (show_args || verbose) 349 label = "ARGUMENTS"; 350 else 351 label = "NAME"; 352 353 if (verbose) 354 { 355 s.Printf ("PID PARENT USER GROUP EFF USER EFF GROUP TRIPLE %s\n", label); 356 s.PutCString ("====== ====== ========== ========== ========== ========== ======================== ============================\n"); 357 } 358 else 359 { 360 s.Printf ("PID PARENT USER TRIPLE %s\n", label); 361 s.PutCString ("====== ====== ========== ======================== ============================\n"); 362 } 363 } 364 365 void 366 ProcessInstanceInfo::DumpAsTableRow (Stream &s, Platform *platform, bool show_args, bool verbose) const 367 { 368 if (m_pid != LLDB_INVALID_PROCESS_ID) 369 { 370 const char *cstr; 371 s.Printf ("%-6" PRIu64 " %-6" PRIu64 " ", m_pid, m_parent_pid); 372 373 374 if (verbose) 375 { 376 cstr = platform->GetUserName (m_uid); 377 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 378 s.Printf ("%-10s ", cstr); 379 else 380 s.Printf ("%-10u ", m_uid); 381 382 cstr = platform->GetGroupName (m_gid); 383 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 384 s.Printf ("%-10s ", cstr); 385 else 386 s.Printf ("%-10u ", m_gid); 387 388 cstr = platform->GetUserName (m_euid); 389 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 390 s.Printf ("%-10s ", cstr); 391 else 392 s.Printf ("%-10u ", m_euid); 393 394 cstr = platform->GetGroupName (m_egid); 395 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 396 s.Printf ("%-10s ", cstr); 397 else 398 s.Printf ("%-10u ", m_egid); 399 s.Printf ("%-24s ", m_arch.IsValid() ? m_arch.GetTriple().str().c_str() : ""); 400 } 401 else 402 { 403 s.Printf ("%-10s %-24s ", 404 platform->GetUserName (m_euid), 405 m_arch.IsValid() ? m_arch.GetTriple().str().c_str() : ""); 406 } 407 408 if (verbose || show_args) 409 { 410 const uint32_t argc = m_arguments.GetArgumentCount(); 411 if (argc > 0) 412 { 413 for (uint32_t i=0; i<argc; i++) 414 { 415 if (i > 0) 416 s.PutChar (' '); 417 s.PutCString (m_arguments.GetArgumentAtIndex(i)); 418 } 419 } 420 } 421 else 422 { 423 s.PutCString (GetName()); 424 } 425 426 s.EOL(); 427 } 428 } 429 430 Error 431 ProcessLaunchCommandOptions::SetOptionValue (uint32_t option_idx, const char *option_arg) 432 { 433 Error error; 434 const int short_option = m_getopt_table[option_idx].val; 435 436 switch (short_option) 437 { 438 case 's': // Stop at program entry point 439 launch_info.GetFlags().Set (eLaunchFlagStopAtEntry); 440 break; 441 442 case 'i': // STDIN for read only 443 { 444 FileAction action; 445 if (action.Open(STDIN_FILENO, FileSpec{option_arg, false}, true, false)) 446 launch_info.AppendFileAction (action); 447 break; 448 } 449 450 case 'o': // Open STDOUT for write only 451 { 452 FileAction action; 453 if (action.Open(STDOUT_FILENO, FileSpec{option_arg, false}, false, true)) 454 launch_info.AppendFileAction (action); 455 break; 456 } 457 458 case 'e': // STDERR for write only 459 { 460 FileAction action; 461 if (action.Open(STDERR_FILENO, FileSpec{option_arg, false}, false, true)) 462 launch_info.AppendFileAction (action); 463 break; 464 } 465 466 case 'p': // Process plug-in name 467 launch_info.SetProcessPluginName (option_arg); 468 break; 469 470 case 'n': // Disable STDIO 471 { 472 FileAction action; 473 const FileSpec dev_null{"/dev/null", false}; 474 if (action.Open(STDIN_FILENO, dev_null, true, false)) 475 launch_info.AppendFileAction (action); 476 if (action.Open(STDOUT_FILENO, dev_null, false, true)) 477 launch_info.AppendFileAction (action); 478 if (action.Open(STDERR_FILENO, dev_null, false, true)) 479 launch_info.AppendFileAction (action); 480 break; 481 } 482 483 case 'w': 484 launch_info.SetWorkingDirectory(FileSpec{option_arg, false}); 485 break; 486 487 case 't': // Open process in new terminal window 488 launch_info.GetFlags().Set (eLaunchFlagLaunchInTTY); 489 break; 490 491 case 'a': 492 if (!launch_info.GetArchitecture().SetTriple (option_arg, m_interpreter.GetPlatform(true).get())) 493 launch_info.GetArchitecture().SetTriple (option_arg); 494 break; 495 496 case 'A': // Disable ASLR. 497 { 498 bool success; 499 const bool disable_aslr_arg = Args::StringToBoolean (option_arg, true, &success); 500 if (success) 501 disable_aslr = disable_aslr_arg ? eLazyBoolYes : eLazyBoolNo; 502 else 503 error.SetErrorStringWithFormat ("Invalid boolean value for disable-aslr option: '%s'", option_arg ? option_arg : "<null>"); 504 break; 505 } 506 507 case 'X': // shell expand args. 508 { 509 bool success; 510 const bool expand_args = Args::StringToBoolean (option_arg, true, &success); 511 if (success) 512 launch_info.SetShellExpandArguments(expand_args); 513 else 514 error.SetErrorStringWithFormat ("Invalid boolean value for shell-expand-args option: '%s'", option_arg ? option_arg : "<null>"); 515 break; 516 } 517 518 case 'c': 519 if (option_arg && option_arg[0]) 520 launch_info.SetShell (FileSpec(option_arg, false)); 521 else 522 launch_info.SetShell (HostInfo::GetDefaultShell()); 523 break; 524 525 case 'v': 526 launch_info.GetEnvironmentEntries().AppendArgument(option_arg); 527 break; 528 529 default: 530 error.SetErrorStringWithFormat("unrecognized short option character '%c'", short_option); 531 break; 532 } 533 return error; 534 } 535 536 OptionDefinition 537 ProcessLaunchCommandOptions::g_option_table[] = 538 { 539 { 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."}, 540 { 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."}, 541 { LLDB_OPT_SET_ALL, false, "plugin", 'p', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypePlugin, "Name of the process plugin you want to use."}, 542 { 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."}, 543 { LLDB_OPT_SET_ALL, false, "arch", 'a', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeArchitecture, "Set the architecture for the process to launch when ambiguous."}, 544 { 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."}, 545 { LLDB_OPT_SET_1|LLDB_OPT_SET_2|LLDB_OPT_SET_3, false, "shell", 'c', OptionParser::eOptionalArgument, NULL, NULL, 0, eArgTypeFilename, "Run the process in a shell (not supported on all platforms)."}, 546 547 { LLDB_OPT_SET_1 , false, "stdin", 'i', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeFilename, "Redirect stdin for the process to <filename>."}, 548 { LLDB_OPT_SET_1 , false, "stdout", 'o', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeFilename, "Redirect stdout for the process to <filename>."}, 549 { LLDB_OPT_SET_1 , false, "stderr", 'e', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeFilename, "Redirect stderr for the process to <filename>."}, 550 551 { LLDB_OPT_SET_2 , false, "tty", 't', OptionParser::eNoArgument, NULL, NULL, 0, eArgTypeNone, "Start the process in a terminal (not supported on all platforms)."}, 552 553 { 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."}, 554 { LLDB_OPT_SET_4, false, "shell-expand-args", 'X', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeBoolean, "Set whether to shell expand arguments to the process when launching."}, 555 { 0 , false, NULL, 0, 0, NULL, NULL, 0, eArgTypeNone, NULL } 556 }; 557 558 559 560 bool 561 ProcessInstanceInfoMatch::NameMatches (const char *process_name) const 562 { 563 if (m_name_match_type == eNameMatchIgnore || process_name == NULL) 564 return true; 565 const char *match_name = m_match_info.GetName(); 566 if (!match_name) 567 return true; 568 569 return lldb_private::NameMatches (process_name, m_name_match_type, match_name); 570 } 571 572 bool 573 ProcessInstanceInfoMatch::Matches (const ProcessInstanceInfo &proc_info) const 574 { 575 if (!NameMatches (proc_info.GetName())) 576 return false; 577 578 if (m_match_info.ProcessIDIsValid() && 579 m_match_info.GetProcessID() != proc_info.GetProcessID()) 580 return false; 581 582 if (m_match_info.ParentProcessIDIsValid() && 583 m_match_info.GetParentProcessID() != proc_info.GetParentProcessID()) 584 return false; 585 586 if (m_match_info.UserIDIsValid () && 587 m_match_info.GetUserID() != proc_info.GetUserID()) 588 return false; 589 590 if (m_match_info.GroupIDIsValid () && 591 m_match_info.GetGroupID() != proc_info.GetGroupID()) 592 return false; 593 594 if (m_match_info.EffectiveUserIDIsValid () && 595 m_match_info.GetEffectiveUserID() != proc_info.GetEffectiveUserID()) 596 return false; 597 598 if (m_match_info.EffectiveGroupIDIsValid () && 599 m_match_info.GetEffectiveGroupID() != proc_info.GetEffectiveGroupID()) 600 return false; 601 602 if (m_match_info.GetArchitecture().IsValid() && 603 !m_match_info.GetArchitecture().IsCompatibleMatch(proc_info.GetArchitecture())) 604 return false; 605 return true; 606 } 607 608 bool 609 ProcessInstanceInfoMatch::MatchAllProcesses () const 610 { 611 if (m_name_match_type != eNameMatchIgnore) 612 return false; 613 614 if (m_match_info.ProcessIDIsValid()) 615 return false; 616 617 if (m_match_info.ParentProcessIDIsValid()) 618 return false; 619 620 if (m_match_info.UserIDIsValid ()) 621 return false; 622 623 if (m_match_info.GroupIDIsValid ()) 624 return false; 625 626 if (m_match_info.EffectiveUserIDIsValid ()) 627 return false; 628 629 if (m_match_info.EffectiveGroupIDIsValid ()) 630 return false; 631 632 if (m_match_info.GetArchitecture().IsValid()) 633 return false; 634 635 if (m_match_all_users) 636 return false; 637 638 return true; 639 640 } 641 642 void 643 ProcessInstanceInfoMatch::Clear() 644 { 645 m_match_info.Clear(); 646 m_name_match_type = eNameMatchIgnore; 647 m_match_all_users = false; 648 } 649 650 ProcessSP 651 Process::FindPlugin (lldb::TargetSP target_sp, const char *plugin_name, Listener &listener, const FileSpec *crash_file_path) 652 { 653 static uint32_t g_process_unique_id = 0; 654 655 ProcessSP process_sp; 656 ProcessCreateInstance create_callback = NULL; 657 if (plugin_name) 658 { 659 ConstString const_plugin_name(plugin_name); 660 create_callback = PluginManager::GetProcessCreateCallbackForPluginName (const_plugin_name); 661 if (create_callback) 662 { 663 process_sp = create_callback(target_sp, listener, crash_file_path); 664 if (process_sp) 665 { 666 if (process_sp->CanDebug(target_sp, true)) 667 { 668 process_sp->m_process_unique_id = ++g_process_unique_id; 669 } 670 else 671 process_sp.reset(); 672 } 673 } 674 } 675 else 676 { 677 for (uint32_t idx = 0; (create_callback = PluginManager::GetProcessCreateCallbackAtIndex(idx)) != NULL; ++idx) 678 { 679 process_sp = create_callback(target_sp, listener, crash_file_path); 680 if (process_sp) 681 { 682 if (process_sp->CanDebug(target_sp, false)) 683 { 684 process_sp->m_process_unique_id = ++g_process_unique_id; 685 break; 686 } 687 else 688 process_sp.reset(); 689 } 690 } 691 } 692 return process_sp; 693 } 694 695 ConstString & 696 Process::GetStaticBroadcasterClass () 697 { 698 static ConstString class_name ("lldb.process"); 699 return class_name; 700 } 701 702 //---------------------------------------------------------------------- 703 // Process constructor 704 //---------------------------------------------------------------------- 705 Process::Process(lldb::TargetSP target_sp, Listener &listener) : 706 Process(target_sp, listener, UnixSignals::Create(HostInfo::GetArchitecture())) 707 { 708 // This constructor just delegates to the full Process constructor, 709 // defaulting to using the Host's UnixSignals. 710 } 711 712 Process::Process(lldb::TargetSP target_sp, Listener &listener, const UnixSignalsSP &unix_signals_sp) : 713 ProcessProperties (this), 714 UserID (LLDB_INVALID_PROCESS_ID), 715 Broadcaster (&(target_sp->GetDebugger()), Process::GetStaticBroadcasterClass().AsCString()), 716 m_target_sp (target_sp), 717 m_public_state (eStateUnloaded), 718 m_private_state (eStateUnloaded), 719 m_private_state_broadcaster (NULL, "lldb.process.internal_state_broadcaster"), 720 m_private_state_control_broadcaster (NULL, "lldb.process.internal_state_control_broadcaster"), 721 m_private_state_listener ("lldb.process.internal_state_listener"), 722 m_private_state_control_wait(), 723 m_mod_id (), 724 m_process_unique_id(0), 725 m_thread_index_id (0), 726 m_thread_id_to_index_id_map (), 727 m_exit_status (-1), 728 m_exit_string (), 729 m_exit_status_mutex(), 730 m_thread_mutex (Mutex::eMutexTypeRecursive), 731 m_thread_list_real (this), 732 m_thread_list (this), 733 m_extended_thread_list (this), 734 m_extended_thread_stop_id (0), 735 m_queue_list (this), 736 m_queue_list_stop_id (0), 737 m_notifications (), 738 m_image_tokens (), 739 m_listener (listener), 740 m_breakpoint_site_list (), 741 m_dynamic_checkers_ap (), 742 m_unix_signals_sp (unix_signals_sp), 743 m_abi_sp (), 744 m_process_input_reader (), 745 m_stdio_communication ("process.stdio"), 746 m_stdio_communication_mutex (Mutex::eMutexTypeRecursive), 747 m_stdin_forward (false), 748 m_stdout_data (), 749 m_stderr_data (), 750 m_profile_data_comm_mutex (Mutex::eMutexTypeRecursive), 751 m_profile_data (), 752 m_iohandler_sync (0), 753 m_memory_cache (*this), 754 m_allocated_memory_cache (*this), 755 m_should_detach (false), 756 m_next_event_action_ap(), 757 m_public_run_lock (), 758 m_private_run_lock (), 759 m_currently_handling_event(false), 760 m_stop_info_override_callback (NULL), 761 m_finalizing (false), 762 m_finalize_called (false), 763 m_clear_thread_plans_on_stop (false), 764 m_force_next_event_delivery (false), 765 m_last_broadcast_state (eStateInvalid), 766 m_destroy_in_process (false), 767 m_can_interpret_function_calls(false), 768 m_warnings_issued (), 769 m_can_jit(eCanJITDontKnow) 770 { 771 CheckInWithManager (); 772 773 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 774 if (log) 775 log->Printf ("%p Process::Process()", static_cast<void*>(this)); 776 777 if (!m_unix_signals_sp) 778 m_unix_signals_sp = std::make_shared<UnixSignals>(); 779 780 SetEventName (eBroadcastBitStateChanged, "state-changed"); 781 SetEventName (eBroadcastBitInterrupt, "interrupt"); 782 SetEventName (eBroadcastBitSTDOUT, "stdout-available"); 783 SetEventName (eBroadcastBitSTDERR, "stderr-available"); 784 SetEventName (eBroadcastBitProfileData, "profile-data-available"); 785 786 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlStop , "control-stop" ); 787 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlPause , "control-pause" ); 788 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlResume, "control-resume"); 789 790 listener.StartListeningForEvents (this, 791 eBroadcastBitStateChanged | 792 eBroadcastBitInterrupt | 793 eBroadcastBitSTDOUT | 794 eBroadcastBitSTDERR | 795 eBroadcastBitProfileData); 796 797 m_private_state_listener.StartListeningForEvents(&m_private_state_broadcaster, 798 eBroadcastBitStateChanged | 799 eBroadcastBitInterrupt); 800 801 m_private_state_listener.StartListeningForEvents(&m_private_state_control_broadcaster, 802 eBroadcastInternalStateControlStop | 803 eBroadcastInternalStateControlPause | 804 eBroadcastInternalStateControlResume); 805 // We need something valid here, even if just the default UnixSignalsSP. 806 assert (m_unix_signals_sp && "null m_unix_signals_sp after initialization"); 807 } 808 809 //---------------------------------------------------------------------- 810 // Destructor 811 //---------------------------------------------------------------------- 812 Process::~Process() 813 { 814 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 815 if (log) 816 log->Printf ("%p Process::~Process()", static_cast<void*>(this)); 817 StopPrivateStateThread(); 818 819 // ThreadList::Clear() will try to acquire this process's mutex, so 820 // explicitly clear the thread list here to ensure that the mutex 821 // is not destroyed before the thread list. 822 m_thread_list.Clear(); 823 } 824 825 const ProcessPropertiesSP & 826 Process::GetGlobalProperties() 827 { 828 static ProcessPropertiesSP g_settings_sp; 829 if (!g_settings_sp) 830 g_settings_sp.reset (new ProcessProperties (NULL)); 831 return g_settings_sp; 832 } 833 834 void 835 Process::Finalize() 836 { 837 m_finalizing = true; 838 839 // Destroy this process if needed 840 switch (GetPrivateState()) 841 { 842 case eStateConnected: 843 case eStateAttaching: 844 case eStateLaunching: 845 case eStateStopped: 846 case eStateRunning: 847 case eStateStepping: 848 case eStateCrashed: 849 case eStateSuspended: 850 Destroy(false); 851 break; 852 853 case eStateInvalid: 854 case eStateUnloaded: 855 case eStateDetached: 856 case eStateExited: 857 break; 858 } 859 860 // Clear our broadcaster before we proceed with destroying 861 Broadcaster::Clear(); 862 863 // Do any cleanup needed prior to being destructed... Subclasses 864 // that override this method should call this superclass method as well. 865 866 // We need to destroy the loader before the derived Process class gets destroyed 867 // since it is very likely that undoing the loader will require access to the real process. 868 m_dynamic_checkers_ap.reset(); 869 m_abi_sp.reset(); 870 m_os_ap.reset(); 871 m_system_runtime_ap.reset(); 872 m_dyld_ap.reset(); 873 m_jit_loaders_ap.reset(); 874 m_thread_list_real.Destroy(); 875 m_thread_list.Destroy(); 876 m_extended_thread_list.Destroy(); 877 m_queue_list.Clear(); 878 m_queue_list_stop_id = 0; 879 std::vector<Notifications> empty_notifications; 880 m_notifications.swap(empty_notifications); 881 m_image_tokens.clear(); 882 m_memory_cache.Clear(); 883 m_allocated_memory_cache.Clear(); 884 m_language_runtimes.clear(); 885 m_instrumentation_runtimes.clear(); 886 m_next_event_action_ap.reset(); 887 m_stop_info_override_callback = NULL; 888 // Clear the last natural stop ID since it has a strong 889 // reference to this process 890 m_mod_id.SetStopEventForLastNaturalStopID(EventSP()); 891 //#ifdef LLDB_CONFIGURATION_DEBUG 892 // StreamFile s(stdout, false); 893 // EventSP event_sp; 894 // while (m_private_state_listener.GetNextEvent(event_sp)) 895 // { 896 // event_sp->Dump (&s); 897 // s.EOL(); 898 // } 899 //#endif 900 // We have to be very careful here as the m_private_state_listener might 901 // contain events that have ProcessSP values in them which can keep this 902 // process around forever. These events need to be cleared out. 903 m_private_state_listener.Clear(); 904 m_public_run_lock.TrySetRunning(); // This will do nothing if already locked 905 m_public_run_lock.SetStopped(); 906 m_private_run_lock.TrySetRunning(); // This will do nothing if already locked 907 m_private_run_lock.SetStopped(); 908 m_finalize_called = true; 909 } 910 911 void 912 Process::RegisterNotificationCallbacks (const Notifications& callbacks) 913 { 914 m_notifications.push_back(callbacks); 915 if (callbacks.initialize != NULL) 916 callbacks.initialize (callbacks.baton, this); 917 } 918 919 bool 920 Process::UnregisterNotificationCallbacks(const Notifications& callbacks) 921 { 922 std::vector<Notifications>::iterator pos, end = m_notifications.end(); 923 for (pos = m_notifications.begin(); pos != end; ++pos) 924 { 925 if (pos->baton == callbacks.baton && 926 pos->initialize == callbacks.initialize && 927 pos->process_state_changed == callbacks.process_state_changed) 928 { 929 m_notifications.erase(pos); 930 return true; 931 } 932 } 933 return false; 934 } 935 936 void 937 Process::SynchronouslyNotifyStateChanged (StateType state) 938 { 939 std::vector<Notifications>::iterator notification_pos, notification_end = m_notifications.end(); 940 for (notification_pos = m_notifications.begin(); notification_pos != notification_end; ++notification_pos) 941 { 942 if (notification_pos->process_state_changed) 943 notification_pos->process_state_changed (notification_pos->baton, this, state); 944 } 945 } 946 947 // FIXME: We need to do some work on events before the general Listener sees them. 948 // For instance if we are continuing from a breakpoint, we need to ensure that we do 949 // the little "insert real insn, step & stop" trick. But we can't do that when the 950 // event is delivered by the broadcaster - since that is done on the thread that is 951 // waiting for new events, so if we needed more than one event for our handling, we would 952 // stall. So instead we do it when we fetch the event off of the queue. 953 // 954 955 StateType 956 Process::GetNextEvent (EventSP &event_sp) 957 { 958 StateType state = eStateInvalid; 959 960 if (m_listener.GetNextEventForBroadcaster (this, event_sp) && event_sp) 961 state = Process::ProcessEventData::GetStateFromEvent (event_sp.get()); 962 963 return state; 964 } 965 966 void 967 Process::SyncIOHandler (uint32_t iohandler_id, uint64_t timeout_msec) 968 { 969 // don't sync (potentially context switch) in case where there is no process IO 970 if (! m_process_input_reader) 971 return; 972 973 TimeValue timeout = TimeValue::Now(); 974 timeout.OffsetWithMicroSeconds(timeout_msec*1000); 975 uint32_t new_iohandler_id = 0; 976 m_iohandler_sync.WaitForValueNotEqualTo(iohandler_id, new_iohandler_id, &timeout); 977 978 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 979 if (log) 980 log->Printf("Process::%s waited for m_iohandler_sync to change from %u, new value is %u", __FUNCTION__, iohandler_id, new_iohandler_id); 981 } 982 983 StateType 984 Process::WaitForProcessToStop (const TimeValue *timeout, 985 EventSP *event_sp_ptr, 986 bool wait_always, 987 Listener *hijack_listener, 988 Stream *stream) 989 { 990 // We can't just wait for a "stopped" event, because the stopped event may have restarted the target. 991 // We have to actually check each event, and in the case of a stopped event check the restarted flag 992 // on the event. 993 if (event_sp_ptr) 994 event_sp_ptr->reset(); 995 StateType state = GetState(); 996 // If we are exited or detached, we won't ever get back to any 997 // other valid state... 998 if (state == eStateDetached || state == eStateExited) 999 return state; 1000 1001 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1002 if (log) 1003 log->Printf ("Process::%s (timeout = %p)", __FUNCTION__, 1004 static_cast<const void*>(timeout)); 1005 1006 if (!wait_always && 1007 StateIsStoppedState(state, true) && 1008 StateIsStoppedState(GetPrivateState(), true)) 1009 { 1010 if (log) 1011 log->Printf("Process::%s returning without waiting for events; process private and public states are already 'stopped'.", 1012 __FUNCTION__); 1013 // We need to toggle the run lock as this won't get done in 1014 // SetPublicState() if the process is hijacked. 1015 if (hijack_listener) 1016 m_public_run_lock.SetStopped(); 1017 return state; 1018 } 1019 1020 while (state != eStateInvalid) 1021 { 1022 EventSP event_sp; 1023 state = WaitForStateChangedEvents (timeout, event_sp, hijack_listener); 1024 if (event_sp_ptr && event_sp) 1025 *event_sp_ptr = event_sp; 1026 1027 bool pop_process_io_handler = hijack_listener != NULL; 1028 Process::HandleProcessStateChangedEvent (event_sp, stream, pop_process_io_handler); 1029 1030 switch (state) 1031 { 1032 case eStateCrashed: 1033 case eStateDetached: 1034 case eStateExited: 1035 case eStateUnloaded: 1036 // We need to toggle the run lock as this won't get done in 1037 // SetPublicState() if the process is hijacked. 1038 if (hijack_listener) 1039 m_public_run_lock.SetStopped(); 1040 return state; 1041 case eStateStopped: 1042 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 1043 continue; 1044 else 1045 { 1046 // We need to toggle the run lock as this won't get done in 1047 // SetPublicState() if the process is hijacked. 1048 if (hijack_listener) 1049 m_public_run_lock.SetStopped(); 1050 return state; 1051 } 1052 default: 1053 continue; 1054 } 1055 } 1056 return state; 1057 } 1058 1059 bool 1060 Process::HandleProcessStateChangedEvent (const EventSP &event_sp, 1061 Stream *stream, 1062 bool &pop_process_io_handler) 1063 { 1064 const bool handle_pop = pop_process_io_handler == true; 1065 1066 pop_process_io_handler = false; 1067 ProcessSP process_sp = Process::ProcessEventData::GetProcessFromEvent(event_sp.get()); 1068 1069 if (!process_sp) 1070 return false; 1071 1072 StateType event_state = Process::ProcessEventData::GetStateFromEvent (event_sp.get()); 1073 if (event_state == eStateInvalid) 1074 return false; 1075 1076 switch (event_state) 1077 { 1078 case eStateInvalid: 1079 case eStateUnloaded: 1080 case eStateAttaching: 1081 case eStateLaunching: 1082 case eStateStepping: 1083 case eStateDetached: 1084 { 1085 if (stream) 1086 stream->Printf ("Process %" PRIu64 " %s\n", 1087 process_sp->GetID(), 1088 StateAsCString (event_state)); 1089 1090 if (event_state == eStateDetached) 1091 pop_process_io_handler = true; 1092 } 1093 break; 1094 1095 case eStateConnected: 1096 case eStateRunning: 1097 // Don't be chatty when we run... 1098 break; 1099 1100 case eStateExited: 1101 if (stream) 1102 process_sp->GetStatus(*stream); 1103 pop_process_io_handler = true; 1104 break; 1105 1106 case eStateStopped: 1107 case eStateCrashed: 1108 case eStateSuspended: 1109 // Make sure the program hasn't been auto-restarted: 1110 if (Process::ProcessEventData::GetRestartedFromEvent (event_sp.get())) 1111 { 1112 if (stream) 1113 { 1114 size_t num_reasons = Process::ProcessEventData::GetNumRestartedReasons(event_sp.get()); 1115 if (num_reasons > 0) 1116 { 1117 // FIXME: Do we want to report this, or would that just be annoyingly chatty? 1118 if (num_reasons == 1) 1119 { 1120 const char *reason = Process::ProcessEventData::GetRestartedReasonAtIndex (event_sp.get(), 0); 1121 stream->Printf ("Process %" PRIu64 " stopped and restarted: %s\n", 1122 process_sp->GetID(), 1123 reason ? reason : "<UNKNOWN REASON>"); 1124 } 1125 else 1126 { 1127 stream->Printf ("Process %" PRIu64 " stopped and restarted, reasons:\n", 1128 process_sp->GetID()); 1129 1130 1131 for (size_t i = 0; i < num_reasons; i++) 1132 { 1133 const char *reason = Process::ProcessEventData::GetRestartedReasonAtIndex (event_sp.get(), i); 1134 stream->Printf("\t%s\n", reason ? reason : "<UNKNOWN REASON>"); 1135 } 1136 } 1137 } 1138 } 1139 } 1140 else 1141 { 1142 // Lock the thread list so it doesn't change on us, this is the scope for the locker: 1143 { 1144 ThreadList &thread_list = process_sp->GetThreadList(); 1145 Mutex::Locker locker (thread_list.GetMutex()); 1146 1147 ThreadSP curr_thread (thread_list.GetSelectedThread()); 1148 ThreadSP thread; 1149 StopReason curr_thread_stop_reason = eStopReasonInvalid; 1150 if (curr_thread) 1151 curr_thread_stop_reason = curr_thread->GetStopReason(); 1152 if (!curr_thread || 1153 !curr_thread->IsValid() || 1154 curr_thread_stop_reason == eStopReasonInvalid || 1155 curr_thread_stop_reason == eStopReasonNone) 1156 { 1157 // Prefer a thread that has just completed its plan over another thread as current thread. 1158 ThreadSP plan_thread; 1159 ThreadSP other_thread; 1160 1161 const size_t num_threads = thread_list.GetSize(); 1162 size_t i; 1163 for (i = 0; i < num_threads; ++i) 1164 { 1165 thread = thread_list.GetThreadAtIndex(i); 1166 StopReason thread_stop_reason = thread->GetStopReason(); 1167 switch (thread_stop_reason) 1168 { 1169 case eStopReasonInvalid: 1170 case eStopReasonNone: 1171 break; 1172 1173 case eStopReasonSignal: 1174 { 1175 // Don't select a signal thread if we weren't going to stop at that 1176 // signal. We have to have had another reason for stopping here, and 1177 // the user doesn't want to see this thread. 1178 uint64_t signo = thread->GetStopInfo()->GetValue(); 1179 if (process_sp->GetUnixSignals()->GetShouldStop(signo)) 1180 { 1181 if (!other_thread) 1182 other_thread = thread; 1183 } 1184 break; 1185 } 1186 case eStopReasonTrace: 1187 case eStopReasonBreakpoint: 1188 case eStopReasonWatchpoint: 1189 case eStopReasonException: 1190 case eStopReasonExec: 1191 case eStopReasonThreadExiting: 1192 case eStopReasonInstrumentation: 1193 if (!other_thread) 1194 other_thread = thread; 1195 break; 1196 case eStopReasonPlanComplete: 1197 if (!plan_thread) 1198 plan_thread = thread; 1199 break; 1200 } 1201 } 1202 if (plan_thread) 1203 thread_list.SetSelectedThreadByID (plan_thread->GetID()); 1204 else if (other_thread) 1205 thread_list.SetSelectedThreadByID (other_thread->GetID()); 1206 else 1207 { 1208 if (curr_thread && curr_thread->IsValid()) 1209 thread = curr_thread; 1210 else 1211 thread = thread_list.GetThreadAtIndex(0); 1212 1213 if (thread) 1214 thread_list.SetSelectedThreadByID (thread->GetID()); 1215 } 1216 } 1217 } 1218 // Drop the ThreadList mutex by here, since GetThreadStatus below might have to run code, 1219 // e.g. for Data formatters, and if we hold the ThreadList mutex, then the process is going to 1220 // have a hard time restarting the process. 1221 if (stream) 1222 { 1223 Debugger &debugger = process_sp->GetTarget().GetDebugger(); 1224 if (debugger.GetTargetList().GetSelectedTarget().get() == &process_sp->GetTarget()) 1225 { 1226 const bool only_threads_with_stop_reason = true; 1227 const uint32_t start_frame = 0; 1228 const uint32_t num_frames = 1; 1229 const uint32_t num_frames_with_source = 1; 1230 process_sp->GetStatus(*stream); 1231 process_sp->GetThreadStatus (*stream, 1232 only_threads_with_stop_reason, 1233 start_frame, 1234 num_frames, 1235 num_frames_with_source); 1236 } 1237 else 1238 { 1239 uint32_t target_idx = debugger.GetTargetList().GetIndexOfTarget(process_sp->GetTarget().shared_from_this()); 1240 if (target_idx != UINT32_MAX) 1241 stream->Printf ("Target %d: (", target_idx); 1242 else 1243 stream->Printf ("Target <unknown index>: ("); 1244 process_sp->GetTarget().Dump (stream, eDescriptionLevelBrief); 1245 stream->Printf (") stopped.\n"); 1246 } 1247 } 1248 1249 // Pop the process IO handler 1250 pop_process_io_handler = true; 1251 } 1252 break; 1253 } 1254 1255 if (handle_pop && pop_process_io_handler) 1256 process_sp->PopProcessIOHandler(); 1257 1258 return true; 1259 } 1260 1261 1262 StateType 1263 Process::WaitForState 1264 ( 1265 const TimeValue *timeout, 1266 const StateType *match_states, 1267 const uint32_t num_match_states 1268 ) 1269 { 1270 EventSP event_sp; 1271 uint32_t i; 1272 StateType state = GetState(); 1273 while (state != eStateInvalid) 1274 { 1275 // If we are exited or detached, we won't ever get back to any 1276 // other valid state... 1277 if (state == eStateDetached || state == eStateExited) 1278 return state; 1279 1280 state = WaitForStateChangedEvents (timeout, event_sp, NULL); 1281 1282 for (i=0; i<num_match_states; ++i) 1283 { 1284 if (match_states[i] == state) 1285 return state; 1286 } 1287 } 1288 return state; 1289 } 1290 1291 bool 1292 Process::HijackProcessEvents (Listener *listener) 1293 { 1294 if (listener != NULL) 1295 { 1296 return HijackBroadcaster(listener, eBroadcastBitStateChanged | eBroadcastBitInterrupt); 1297 } 1298 else 1299 return false; 1300 } 1301 1302 void 1303 Process::RestoreProcessEvents () 1304 { 1305 RestoreBroadcaster(); 1306 } 1307 1308 bool 1309 Process::HijackPrivateProcessEvents (Listener *listener) 1310 { 1311 if (listener != NULL) 1312 { 1313 return m_private_state_broadcaster.HijackBroadcaster(listener, eBroadcastBitStateChanged | eBroadcastBitInterrupt); 1314 } 1315 else 1316 return false; 1317 } 1318 1319 void 1320 Process::RestorePrivateProcessEvents () 1321 { 1322 m_private_state_broadcaster.RestoreBroadcaster(); 1323 } 1324 1325 StateType 1326 Process::WaitForStateChangedEvents (const TimeValue *timeout, EventSP &event_sp, Listener *hijack_listener) 1327 { 1328 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1329 1330 if (log) 1331 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, 1332 static_cast<const void*>(timeout)); 1333 1334 Listener *listener = hijack_listener; 1335 if (listener == NULL) 1336 listener = &m_listener; 1337 1338 StateType state = eStateInvalid; 1339 if (listener->WaitForEventForBroadcasterWithType (timeout, 1340 this, 1341 eBroadcastBitStateChanged | eBroadcastBitInterrupt, 1342 event_sp)) 1343 { 1344 if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged) 1345 state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 1346 else if (log) 1347 log->Printf ("Process::%s got no event or was interrupted.", __FUNCTION__); 1348 } 1349 1350 if (log) 1351 log->Printf ("Process::%s (timeout = %p, event_sp) => %s", 1352 __FUNCTION__, static_cast<const void*>(timeout), 1353 StateAsCString(state)); 1354 return state; 1355 } 1356 1357 Event * 1358 Process::PeekAtStateChangedEvents () 1359 { 1360 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1361 1362 if (log) 1363 log->Printf ("Process::%s...", __FUNCTION__); 1364 1365 Event *event_ptr; 1366 event_ptr = m_listener.PeekAtNextEventForBroadcasterWithType (this, 1367 eBroadcastBitStateChanged); 1368 if (log) 1369 { 1370 if (event_ptr) 1371 { 1372 log->Printf ("Process::%s (event_ptr) => %s", 1373 __FUNCTION__, 1374 StateAsCString(ProcessEventData::GetStateFromEvent (event_ptr))); 1375 } 1376 else 1377 { 1378 log->Printf ("Process::%s no events found", 1379 __FUNCTION__); 1380 } 1381 } 1382 return event_ptr; 1383 } 1384 1385 StateType 1386 Process::WaitForStateChangedEventsPrivate (const TimeValue *timeout, EventSP &event_sp) 1387 { 1388 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1389 1390 if (log) 1391 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, 1392 static_cast<const void*>(timeout)); 1393 1394 StateType state = eStateInvalid; 1395 if (m_private_state_listener.WaitForEventForBroadcasterWithType (timeout, 1396 &m_private_state_broadcaster, 1397 eBroadcastBitStateChanged | eBroadcastBitInterrupt, 1398 event_sp)) 1399 if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged) 1400 state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 1401 1402 // This is a bit of a hack, but when we wait here we could very well return 1403 // to the command-line, and that could disable the log, which would render the 1404 // log we got above invalid. 1405 if (log) 1406 log->Printf ("Process::%s (timeout = %p, event_sp) => %s", 1407 __FUNCTION__, static_cast<const void *>(timeout), 1408 state == eStateInvalid ? "TIMEOUT" : StateAsCString(state)); 1409 return state; 1410 } 1411 1412 bool 1413 Process::WaitForEventsPrivate (const TimeValue *timeout, EventSP &event_sp, bool control_only) 1414 { 1415 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1416 1417 if (log) 1418 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, 1419 static_cast<const void*>(timeout)); 1420 1421 if (control_only) 1422 return m_private_state_listener.WaitForEventForBroadcaster(timeout, &m_private_state_control_broadcaster, event_sp); 1423 else 1424 return m_private_state_listener.WaitForEvent(timeout, event_sp); 1425 } 1426 1427 bool 1428 Process::IsRunning () const 1429 { 1430 return StateIsRunningState (m_public_state.GetValue()); 1431 } 1432 1433 int 1434 Process::GetExitStatus () 1435 { 1436 Mutex::Locker locker (m_exit_status_mutex); 1437 1438 if (m_public_state.GetValue() == eStateExited) 1439 return m_exit_status; 1440 return -1; 1441 } 1442 1443 1444 const char * 1445 Process::GetExitDescription () 1446 { 1447 Mutex::Locker locker (m_exit_status_mutex); 1448 1449 if (m_public_state.GetValue() == eStateExited && !m_exit_string.empty()) 1450 return m_exit_string.c_str(); 1451 return NULL; 1452 } 1453 1454 bool 1455 Process::SetExitStatus (int status, const char *cstr) 1456 { 1457 // Use a mutex to protect setting the exit status. 1458 Mutex::Locker locker (m_exit_status_mutex); 1459 1460 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1461 if (log) 1462 log->Printf("Process::SetExitStatus (status=%i (0x%8.8x), description=%s%s%s)", 1463 status, status, 1464 cstr ? "\"" : "", 1465 cstr ? cstr : "NULL", 1466 cstr ? "\"" : ""); 1467 1468 // We were already in the exited state 1469 if (m_private_state.GetValue() == eStateExited) 1470 { 1471 if (log) 1472 log->Printf("Process::SetExitStatus () ignoring exit status because state was already set to eStateExited"); 1473 return false; 1474 } 1475 1476 m_exit_status = status; 1477 if (cstr) 1478 m_exit_string = cstr; 1479 else 1480 m_exit_string.clear(); 1481 1482 // When we exit, we don't need the input reader anymore 1483 if (m_process_input_reader) 1484 { 1485 m_process_input_reader->SetIsDone(true); 1486 m_process_input_reader->Cancel(); 1487 m_process_input_reader.reset(); 1488 } 1489 1490 // Clear the last natural stop ID since it has a strong 1491 // reference to this process 1492 m_mod_id.SetStopEventForLastNaturalStopID(EventSP()); 1493 1494 SetPrivateState (eStateExited); 1495 1496 // Allow subclasses to do some cleanup 1497 DidExit (); 1498 1499 return true; 1500 } 1501 1502 // This static callback can be used to watch for local child processes on 1503 // the current host. The child process exits, the process will be 1504 // found in the global target list (we want to be completely sure that the 1505 // lldb_private::Process doesn't go away before we can deliver the signal. 1506 bool 1507 Process::SetProcessExitStatus (void *callback_baton, 1508 lldb::pid_t pid, 1509 bool exited, 1510 int signo, // Zero for no signal 1511 int exit_status // Exit value of process if signal is zero 1512 ) 1513 { 1514 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 1515 if (log) 1516 log->Printf ("Process::SetProcessExitStatus (baton=%p, pid=%" PRIu64 ", exited=%i, signal=%i, exit_status=%i)\n", 1517 callback_baton, 1518 pid, 1519 exited, 1520 signo, 1521 exit_status); 1522 1523 if (exited) 1524 { 1525 TargetSP target_sp(Debugger::FindTargetWithProcessID (pid)); 1526 if (target_sp) 1527 { 1528 ProcessSP process_sp (target_sp->GetProcessSP()); 1529 if (process_sp) 1530 { 1531 const char *signal_cstr = NULL; 1532 if (signo) 1533 signal_cstr = process_sp->GetUnixSignals()->GetSignalAsCString(signo); 1534 1535 process_sp->SetExitStatus (exit_status, signal_cstr); 1536 } 1537 } 1538 return true; 1539 } 1540 return false; 1541 } 1542 1543 1544 void 1545 Process::UpdateThreadListIfNeeded () 1546 { 1547 const uint32_t stop_id = GetStopID(); 1548 if (m_thread_list.GetSize(false) == 0 || stop_id != m_thread_list.GetStopID()) 1549 { 1550 const StateType state = GetPrivateState(); 1551 if (StateIsStoppedState (state, true)) 1552 { 1553 Mutex::Locker locker (m_thread_list.GetMutex ()); 1554 // m_thread_list does have its own mutex, but we need to 1555 // hold onto the mutex between the call to UpdateThreadList(...) 1556 // and the os->UpdateThreadList(...) so it doesn't change on us 1557 ThreadList &old_thread_list = m_thread_list; 1558 ThreadList real_thread_list(this); 1559 ThreadList new_thread_list(this); 1560 // Always update the thread list with the protocol specific 1561 // thread list, but only update if "true" is returned 1562 if (UpdateThreadList (m_thread_list_real, real_thread_list)) 1563 { 1564 // Don't call into the OperatingSystem to update the thread list if we are shutting down, since 1565 // that may call back into the SBAPI's, requiring the API lock which is already held by whoever is 1566 // shutting us down, causing a deadlock. 1567 if (!m_destroy_in_process) 1568 { 1569 OperatingSystem *os = GetOperatingSystem (); 1570 if (os) 1571 { 1572 // Clear any old backing threads where memory threads might have been 1573 // backed by actual threads from the lldb_private::Process subclass 1574 size_t num_old_threads = old_thread_list.GetSize(false); 1575 for (size_t i=0; i<num_old_threads; ++i) 1576 old_thread_list.GetThreadAtIndex(i, false)->ClearBackingThread(); 1577 1578 // Turn off dynamic types to ensure we don't run any expressions. Objective C 1579 // can run an expression to determine if a SBValue is a dynamic type or not 1580 // and we need to avoid this. OperatingSystem plug-ins can't run expressions 1581 // that require running code... 1582 1583 Target &target = GetTarget(); 1584 const lldb::DynamicValueType saved_prefer_dynamic = target.GetPreferDynamicValue (); 1585 if (saved_prefer_dynamic != lldb::eNoDynamicValues) 1586 target.SetPreferDynamicValue(lldb::eNoDynamicValues); 1587 1588 // Now let the OperatingSystem plug-in update the thread list 1589 1590 os->UpdateThreadList (old_thread_list, // Old list full of threads created by OS plug-in 1591 real_thread_list, // The actual thread list full of threads created by each lldb_private::Process subclass 1592 new_thread_list); // The new thread list that we will show to the user that gets filled in 1593 1594 if (saved_prefer_dynamic != lldb::eNoDynamicValues) 1595 target.SetPreferDynamicValue(saved_prefer_dynamic); 1596 } 1597 else 1598 { 1599 // No OS plug-in, the new thread list is the same as the real thread list 1600 new_thread_list = real_thread_list; 1601 } 1602 } 1603 1604 m_thread_list_real.Update(real_thread_list); 1605 m_thread_list.Update (new_thread_list); 1606 m_thread_list.SetStopID (stop_id); 1607 1608 if (GetLastNaturalStopID () != m_extended_thread_stop_id) 1609 { 1610 // Clear any extended threads that we may have accumulated previously 1611 m_extended_thread_list.Clear(); 1612 m_extended_thread_stop_id = GetLastNaturalStopID (); 1613 1614 m_queue_list.Clear(); 1615 m_queue_list_stop_id = GetLastNaturalStopID (); 1616 } 1617 } 1618 } 1619 } 1620 } 1621 1622 void 1623 Process::UpdateQueueListIfNeeded () 1624 { 1625 if (m_system_runtime_ap.get()) 1626 { 1627 if (m_queue_list.GetSize() == 0 || m_queue_list_stop_id != GetLastNaturalStopID()) 1628 { 1629 const StateType state = GetPrivateState(); 1630 if (StateIsStoppedState (state, true)) 1631 { 1632 m_system_runtime_ap->PopulateQueueList (m_queue_list); 1633 m_queue_list_stop_id = GetLastNaturalStopID(); 1634 } 1635 } 1636 } 1637 } 1638 1639 ThreadSP 1640 Process::CreateOSPluginThread (lldb::tid_t tid, lldb::addr_t context) 1641 { 1642 OperatingSystem *os = GetOperatingSystem (); 1643 if (os) 1644 return os->CreateThread(tid, context); 1645 return ThreadSP(); 1646 } 1647 1648 uint32_t 1649 Process::GetNextThreadIndexID (uint64_t thread_id) 1650 { 1651 return AssignIndexIDToThread(thread_id); 1652 } 1653 1654 bool 1655 Process::HasAssignedIndexIDToThread(uint64_t thread_id) 1656 { 1657 std::map<uint64_t, uint32_t>::iterator iterator = m_thread_id_to_index_id_map.find(thread_id); 1658 if (iterator == m_thread_id_to_index_id_map.end()) 1659 { 1660 return false; 1661 } 1662 else 1663 { 1664 return true; 1665 } 1666 } 1667 1668 uint32_t 1669 Process::AssignIndexIDToThread(uint64_t thread_id) 1670 { 1671 uint32_t result = 0; 1672 std::map<uint64_t, uint32_t>::iterator iterator = m_thread_id_to_index_id_map.find(thread_id); 1673 if (iterator == m_thread_id_to_index_id_map.end()) 1674 { 1675 result = ++m_thread_index_id; 1676 m_thread_id_to_index_id_map[thread_id] = result; 1677 } 1678 else 1679 { 1680 result = iterator->second; 1681 } 1682 1683 return result; 1684 } 1685 1686 StateType 1687 Process::GetState() 1688 { 1689 // If any other threads access this we will need a mutex for it 1690 return m_public_state.GetValue (); 1691 } 1692 1693 bool 1694 Process::StateChangedIsExternallyHijacked() 1695 { 1696 if (IsHijackedForEvent(eBroadcastBitStateChanged)) 1697 { 1698 if (strcmp(m_hijacking_listeners.back()->GetName(), "lldb.Process.ResumeSynchronous.hijack")) 1699 return true; 1700 } 1701 return false; 1702 } 1703 1704 void 1705 Process::SetPublicState (StateType new_state, bool restarted) 1706 { 1707 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1708 if (log) 1709 log->Printf("Process::SetPublicState (state = %s, restarted = %i)", StateAsCString(new_state), restarted); 1710 const StateType old_state = m_public_state.GetValue(); 1711 m_public_state.SetValue (new_state); 1712 1713 // On the transition from Run to Stopped, we unlock the writer end of the 1714 // run lock. The lock gets locked in Resume, which is the public API 1715 // to tell the program to run. 1716 if (!StateChangedIsExternallyHijacked()) 1717 { 1718 if (new_state == eStateDetached) 1719 { 1720 if (log) 1721 log->Printf("Process::SetPublicState (%s) -- unlocking run lock for detach", StateAsCString(new_state)); 1722 m_public_run_lock.SetStopped(); 1723 } 1724 else 1725 { 1726 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1727 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1728 if ((old_state_is_stopped != new_state_is_stopped)) 1729 { 1730 if (new_state_is_stopped && !restarted) 1731 { 1732 if (log) 1733 log->Printf("Process::SetPublicState (%s) -- unlocking run lock", StateAsCString(new_state)); 1734 m_public_run_lock.SetStopped(); 1735 } 1736 } 1737 } 1738 } 1739 } 1740 1741 Error 1742 Process::Resume () 1743 { 1744 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1745 if (log) 1746 log->Printf("Process::Resume -- locking run lock"); 1747 if (!m_public_run_lock.TrySetRunning()) 1748 { 1749 Error error("Resume request failed - process still running."); 1750 if (log) 1751 log->Printf ("Process::Resume: -- TrySetRunning failed, not resuming."); 1752 return error; 1753 } 1754 return PrivateResume(); 1755 } 1756 1757 Error 1758 Process::ResumeSynchronous (Stream *stream) 1759 { 1760 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1761 if (log) 1762 log->Printf("Process::ResumeSynchronous -- locking run lock"); 1763 if (!m_public_run_lock.TrySetRunning()) 1764 { 1765 Error error("Resume request failed - process still running."); 1766 if (log) 1767 log->Printf ("Process::Resume: -- TrySetRunning failed, not resuming."); 1768 return error; 1769 } 1770 1771 ListenerSP listener_sp (new Listener("lldb.Process.ResumeSynchronous.hijack")); 1772 HijackProcessEvents(listener_sp.get()); 1773 1774 Error error = PrivateResume(); 1775 if (error.Success()) 1776 { 1777 StateType state = WaitForProcessToStop (NULL, NULL, true, listener_sp.get(), stream); 1778 const bool must_be_alive = false; // eStateExited is ok, so this must be false 1779 if (!StateIsStoppedState(state, must_be_alive)) 1780 error.SetErrorStringWithFormat("process not in stopped state after synchronous resume: %s", StateAsCString(state)); 1781 } 1782 1783 // Undo the hijacking of process events... 1784 RestoreProcessEvents(); 1785 1786 return error; 1787 } 1788 1789 StateType 1790 Process::GetPrivateState () 1791 { 1792 return m_private_state.GetValue(); 1793 } 1794 1795 void 1796 Process::SetPrivateState (StateType new_state) 1797 { 1798 if (m_finalize_called) 1799 return; 1800 1801 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1802 bool state_changed = false; 1803 1804 if (log) 1805 log->Printf("Process::SetPrivateState (%s)", StateAsCString(new_state)); 1806 1807 Mutex::Locker thread_locker(m_thread_list.GetMutex()); 1808 Mutex::Locker locker(m_private_state.GetMutex()); 1809 1810 const StateType old_state = m_private_state.GetValueNoLock (); 1811 state_changed = old_state != new_state; 1812 1813 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1814 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1815 if (old_state_is_stopped != new_state_is_stopped) 1816 { 1817 if (new_state_is_stopped) 1818 m_private_run_lock.SetStopped(); 1819 else 1820 m_private_run_lock.SetRunning(); 1821 } 1822 1823 if (state_changed) 1824 { 1825 m_private_state.SetValueNoLock (new_state); 1826 EventSP event_sp (new Event (eBroadcastBitStateChanged, new ProcessEventData (shared_from_this(), new_state))); 1827 if (StateIsStoppedState(new_state, false)) 1828 { 1829 // Note, this currently assumes that all threads in the list 1830 // stop when the process stops. In the future we will want to 1831 // support a debugging model where some threads continue to run 1832 // while others are stopped. When that happens we will either need 1833 // a way for the thread list to identify which threads are stopping 1834 // or create a special thread list containing only threads which 1835 // actually stopped. 1836 // 1837 // The process plugin is responsible for managing the actual 1838 // behavior of the threads and should have stopped any threads 1839 // that are going to stop before we get here. 1840 m_thread_list.DidStop(); 1841 1842 m_mod_id.BumpStopID(); 1843 if (!m_mod_id.IsLastResumeForUserExpression()) 1844 m_mod_id.SetStopEventForLastNaturalStopID(event_sp); 1845 m_memory_cache.Clear(); 1846 if (log) 1847 log->Printf("Process::SetPrivateState (%s) stop_id = %u", StateAsCString(new_state), m_mod_id.GetStopID()); 1848 } 1849 1850 // Use our target to get a shared pointer to ourselves... 1851 if (m_finalize_called && PrivateStateThreadIsValid() == false) 1852 BroadcastEvent (event_sp); 1853 else 1854 m_private_state_broadcaster.BroadcastEvent (event_sp); 1855 } 1856 else 1857 { 1858 if (log) 1859 log->Printf("Process::SetPrivateState (%s) state didn't change. Ignoring...", StateAsCString(new_state)); 1860 } 1861 } 1862 1863 void 1864 Process::SetRunningUserExpression (bool on) 1865 { 1866 m_mod_id.SetRunningUserExpression (on); 1867 } 1868 1869 addr_t 1870 Process::GetImageInfoAddress() 1871 { 1872 return LLDB_INVALID_ADDRESS; 1873 } 1874 1875 //---------------------------------------------------------------------- 1876 // LoadImage 1877 // 1878 // This function provides a default implementation that works for most 1879 // unix variants. Any Process subclasses that need to do shared library 1880 // loading differently should override LoadImage and UnloadImage and 1881 // do what is needed. 1882 //---------------------------------------------------------------------- 1883 uint32_t 1884 Process::LoadImage (const FileSpec &image_spec, Error &error) 1885 { 1886 if (m_finalizing) 1887 { 1888 error.SetErrorString("process is tearing itself down"); 1889 return LLDB_INVALID_IMAGE_TOKEN; 1890 } 1891 1892 char path[PATH_MAX]; 1893 image_spec.GetPath(path, sizeof(path)); 1894 1895 DynamicLoader *loader = GetDynamicLoader(); 1896 if (loader) 1897 { 1898 error = loader->CanLoadImage(); 1899 if (error.Fail()) 1900 return LLDB_INVALID_IMAGE_TOKEN; 1901 } 1902 1903 if (error.Success()) 1904 { 1905 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 1906 1907 if (thread_sp) 1908 { 1909 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 1910 1911 if (frame_sp) 1912 { 1913 ExecutionContext exe_ctx; 1914 frame_sp->CalculateExecutionContext (exe_ctx); 1915 EvaluateExpressionOptions expr_options; 1916 expr_options.SetUnwindOnError(true); 1917 expr_options.SetIgnoreBreakpoints(true); 1918 expr_options.SetExecutionPolicy(eExecutionPolicyAlways); 1919 expr_options.SetResultIsInternal(true); 1920 expr_options.SetLanguage(eLanguageTypeC_plus_plus); 1921 1922 StreamString expr; 1923 expr.Printf(R"( 1924 struct __lldb_dlopen_result { void *image_ptr; const char *error_str; } the_result; 1925 the_result.image_ptr = dlopen ("%s", 2); 1926 if (the_result.image_ptr == (void *) 0x0) 1927 { 1928 the_result.error_str = dlerror(); 1929 } 1930 else 1931 { 1932 the_result.error_str = (const char *) 0x0; 1933 } 1934 the_result; 1935 )", 1936 path); 1937 const char *prefix = R"( 1938 extern "C" void* dlopen (const char *path, int mode); 1939 extern "C" const char *dlerror (void); 1940 )"; 1941 lldb::ValueObjectSP result_valobj_sp; 1942 Error expr_error; 1943 UserExpression::Evaluate (exe_ctx, 1944 expr_options, 1945 expr.GetData(), 1946 prefix, 1947 result_valobj_sp, 1948 expr_error); 1949 if (expr_error.Success()) 1950 { 1951 error = result_valobj_sp->GetError(); 1952 if (error.Success()) 1953 { 1954 Scalar scalar; 1955 ValueObjectSP image_ptr_sp = result_valobj_sp->GetChildAtIndex(0, true); 1956 if (image_ptr_sp && image_ptr_sp->ResolveValue (scalar)) 1957 { 1958 addr_t image_ptr = scalar.ULongLong(LLDB_INVALID_ADDRESS); 1959 if (image_ptr != 0 && image_ptr != LLDB_INVALID_ADDRESS) 1960 { 1961 uint32_t image_token = m_image_tokens.size(); 1962 m_image_tokens.push_back (image_ptr); 1963 return image_token; 1964 } 1965 else if (image_ptr == 0) 1966 { 1967 ValueObjectSP error_str_sp = result_valobj_sp->GetChildAtIndex(1, true); 1968 if (error_str_sp) 1969 { 1970 if (error_str_sp->IsCStringContainer(true)) 1971 { 1972 DataBufferSP buffer_sp(new DataBufferHeap(10240,0)); 1973 size_t num_chars = error_str_sp->ReadPointedString (buffer_sp, error, 10240); 1974 if (error.Success() && num_chars > 0) 1975 { 1976 error.Clear(); 1977 error.SetErrorStringWithFormat("dlopen error: %s", buffer_sp->GetBytes()); 1978 } 1979 else 1980 { 1981 error.Clear(); 1982 error.SetErrorStringWithFormat("dlopen failed for unknown reasons."); 1983 } 1984 } 1985 } 1986 } 1987 } 1988 } 1989 } 1990 else 1991 error = expr_error; 1992 } 1993 } 1994 } 1995 if (!error.AsCString()) 1996 error.SetErrorStringWithFormat("unable to load '%s'", path); 1997 return LLDB_INVALID_IMAGE_TOKEN; 1998 } 1999 2000 //---------------------------------------------------------------------- 2001 // UnloadImage 2002 // 2003 // This function provides a default implementation that works for most 2004 // unix variants. Any Process subclasses that need to do shared library 2005 // loading differently should override LoadImage and UnloadImage and 2006 // do what is needed. 2007 //---------------------------------------------------------------------- 2008 Error 2009 Process::UnloadImage (uint32_t image_token) 2010 { 2011 Error error; 2012 2013 if (m_finalizing) 2014 { 2015 error.SetErrorString("process is tearing itself down"); 2016 return error; 2017 } 2018 2019 if (image_token < m_image_tokens.size()) 2020 { 2021 const addr_t image_addr = m_image_tokens[image_token]; 2022 if (image_addr == LLDB_INVALID_ADDRESS) 2023 { 2024 error.SetErrorString("image already unloaded"); 2025 } 2026 else 2027 { 2028 DynamicLoader *loader = GetDynamicLoader(); 2029 if (loader) 2030 error = loader->CanLoadImage(); 2031 2032 if (error.Success()) 2033 { 2034 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 2035 2036 if (thread_sp) 2037 { 2038 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 2039 2040 if (frame_sp) 2041 { 2042 ExecutionContext exe_ctx; 2043 frame_sp->CalculateExecutionContext (exe_ctx); 2044 EvaluateExpressionOptions expr_options; 2045 expr_options.SetUnwindOnError(true); 2046 expr_options.SetIgnoreBreakpoints(true); 2047 expr_options.SetExecutionPolicy(eExecutionPolicyAlways); 2048 expr_options.SetLanguage(eLanguageTypeC_plus_plus); 2049 2050 StreamString expr; 2051 expr.Printf("dlclose ((void *)0x%" PRIx64 ")", image_addr); 2052 const char *prefix = "extern \"C\" int dlclose(void* handle);\n"; 2053 lldb::ValueObjectSP result_valobj_sp; 2054 Error expr_error; 2055 UserExpression::Evaluate (exe_ctx, 2056 expr_options, 2057 expr.GetData(), 2058 prefix, 2059 result_valobj_sp, 2060 expr_error); 2061 if (result_valobj_sp->GetError().Success()) 2062 { 2063 Scalar scalar; 2064 if (result_valobj_sp->ResolveValue (scalar)) 2065 { 2066 if (scalar.UInt(1)) 2067 { 2068 error.SetErrorStringWithFormat("expression failed: \"%s\"", expr.GetData()); 2069 } 2070 else 2071 { 2072 m_image_tokens[image_token] = LLDB_INVALID_ADDRESS; 2073 } 2074 } 2075 } 2076 else 2077 { 2078 error = result_valobj_sp->GetError(); 2079 } 2080 } 2081 } 2082 } 2083 } 2084 } 2085 else 2086 { 2087 error.SetErrorString("invalid image token"); 2088 } 2089 return error; 2090 } 2091 2092 const lldb::ABISP & 2093 Process::GetABI() 2094 { 2095 if (!m_abi_sp) 2096 m_abi_sp = ABI::FindPlugin(GetTarget().GetArchitecture()); 2097 return m_abi_sp; 2098 } 2099 2100 LanguageRuntime * 2101 Process::GetLanguageRuntime(lldb::LanguageType language, bool retry_if_null) 2102 { 2103 if (m_finalizing) 2104 return nullptr; 2105 2106 LanguageRuntimeCollection::iterator pos; 2107 pos = m_language_runtimes.find (language); 2108 if (pos == m_language_runtimes.end() || (retry_if_null && !(*pos).second)) 2109 { 2110 lldb::LanguageRuntimeSP runtime_sp(LanguageRuntime::FindPlugin(this, language)); 2111 2112 m_language_runtimes[language] = runtime_sp; 2113 return runtime_sp.get(); 2114 } 2115 else 2116 return (*pos).second.get(); 2117 } 2118 2119 CPPLanguageRuntime * 2120 Process::GetCPPLanguageRuntime (bool retry_if_null) 2121 { 2122 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeC_plus_plus, retry_if_null); 2123 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeC_plus_plus) 2124 return static_cast<CPPLanguageRuntime *> (runtime); 2125 return NULL; 2126 } 2127 2128 ObjCLanguageRuntime * 2129 Process::GetObjCLanguageRuntime (bool retry_if_null) 2130 { 2131 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeObjC, retry_if_null); 2132 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeObjC) 2133 return static_cast<ObjCLanguageRuntime *> (runtime); 2134 return NULL; 2135 } 2136 2137 bool 2138 Process::IsPossibleDynamicValue (ValueObject& in_value) 2139 { 2140 if (m_finalizing) 2141 return false; 2142 2143 if (in_value.IsDynamic()) 2144 return false; 2145 LanguageType known_type = in_value.GetObjectRuntimeLanguage(); 2146 2147 if (known_type != eLanguageTypeUnknown && known_type != eLanguageTypeC) 2148 { 2149 LanguageRuntime *runtime = GetLanguageRuntime (known_type); 2150 return runtime ? runtime->CouldHaveDynamicValue(in_value) : false; 2151 } 2152 2153 LanguageRuntime *cpp_runtime = GetLanguageRuntime (eLanguageTypeC_plus_plus); 2154 if (cpp_runtime && cpp_runtime->CouldHaveDynamicValue(in_value)) 2155 return true; 2156 2157 LanguageRuntime *objc_runtime = GetLanguageRuntime (eLanguageTypeObjC); 2158 return objc_runtime ? objc_runtime->CouldHaveDynamicValue(in_value) : false; 2159 } 2160 2161 void 2162 Process::SetDynamicCheckers(DynamicCheckerFunctions *dynamic_checkers) 2163 { 2164 m_dynamic_checkers_ap.reset(dynamic_checkers); 2165 } 2166 2167 BreakpointSiteList & 2168 Process::GetBreakpointSiteList() 2169 { 2170 return m_breakpoint_site_list; 2171 } 2172 2173 const BreakpointSiteList & 2174 Process::GetBreakpointSiteList() const 2175 { 2176 return m_breakpoint_site_list; 2177 } 2178 2179 2180 void 2181 Process::DisableAllBreakpointSites () 2182 { 2183 m_breakpoint_site_list.ForEach([this](BreakpointSite *bp_site) -> void { 2184 // bp_site->SetEnabled(true); 2185 DisableBreakpointSite(bp_site); 2186 }); 2187 } 2188 2189 Error 2190 Process::ClearBreakpointSiteByID (lldb::user_id_t break_id) 2191 { 2192 Error error (DisableBreakpointSiteByID (break_id)); 2193 2194 if (error.Success()) 2195 m_breakpoint_site_list.Remove(break_id); 2196 2197 return error; 2198 } 2199 2200 Error 2201 Process::DisableBreakpointSiteByID (lldb::user_id_t break_id) 2202 { 2203 Error error; 2204 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2205 if (bp_site_sp) 2206 { 2207 if (bp_site_sp->IsEnabled()) 2208 error = DisableBreakpointSite (bp_site_sp.get()); 2209 } 2210 else 2211 { 2212 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2213 } 2214 2215 return error; 2216 } 2217 2218 Error 2219 Process::EnableBreakpointSiteByID (lldb::user_id_t break_id) 2220 { 2221 Error error; 2222 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2223 if (bp_site_sp) 2224 { 2225 if (!bp_site_sp->IsEnabled()) 2226 error = EnableBreakpointSite (bp_site_sp.get()); 2227 } 2228 else 2229 { 2230 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2231 } 2232 return error; 2233 } 2234 2235 lldb::break_id_t 2236 Process::CreateBreakpointSite (const BreakpointLocationSP &owner, bool use_hardware) 2237 { 2238 addr_t load_addr = LLDB_INVALID_ADDRESS; 2239 2240 bool show_error = true; 2241 switch (GetState()) 2242 { 2243 case eStateInvalid: 2244 case eStateUnloaded: 2245 case eStateConnected: 2246 case eStateAttaching: 2247 case eStateLaunching: 2248 case eStateDetached: 2249 case eStateExited: 2250 show_error = false; 2251 break; 2252 2253 case eStateStopped: 2254 case eStateRunning: 2255 case eStateStepping: 2256 case eStateCrashed: 2257 case eStateSuspended: 2258 show_error = IsAlive(); 2259 break; 2260 } 2261 2262 // Reset the IsIndirect flag here, in case the location changes from 2263 // pointing to a indirect symbol to a regular symbol. 2264 owner->SetIsIndirect (false); 2265 2266 if (owner->ShouldResolveIndirectFunctions()) 2267 { 2268 Symbol *symbol = owner->GetAddress().CalculateSymbolContextSymbol(); 2269 if (symbol && symbol->IsIndirect()) 2270 { 2271 Error error; 2272 Address symbol_address = symbol->GetAddress(); 2273 load_addr = ResolveIndirectFunction (&symbol_address, error); 2274 if (!error.Success() && show_error) 2275 { 2276 GetTarget().GetDebugger().GetErrorFile()->Printf ("warning: failed to resolve indirect function at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2277 symbol->GetLoadAddress(&GetTarget()), 2278 owner->GetBreakpoint().GetID(), 2279 owner->GetID(), 2280 error.AsCString() ? error.AsCString() : "unknown error"); 2281 return LLDB_INVALID_BREAK_ID; 2282 } 2283 Address resolved_address(load_addr); 2284 load_addr = resolved_address.GetOpcodeLoadAddress (&GetTarget()); 2285 owner->SetIsIndirect(true); 2286 } 2287 else 2288 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&GetTarget()); 2289 } 2290 else 2291 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&GetTarget()); 2292 2293 if (load_addr != LLDB_INVALID_ADDRESS) 2294 { 2295 BreakpointSiteSP bp_site_sp; 2296 2297 // Look up this breakpoint site. If it exists, then add this new owner, otherwise 2298 // create a new breakpoint site and add it. 2299 2300 bp_site_sp = m_breakpoint_site_list.FindByAddress (load_addr); 2301 2302 if (bp_site_sp) 2303 { 2304 bp_site_sp->AddOwner (owner); 2305 owner->SetBreakpointSite (bp_site_sp); 2306 return bp_site_sp->GetID(); 2307 } 2308 else 2309 { 2310 bp_site_sp.reset (new BreakpointSite (&m_breakpoint_site_list, owner, load_addr, use_hardware)); 2311 if (bp_site_sp) 2312 { 2313 Error error = EnableBreakpointSite (bp_site_sp.get()); 2314 if (error.Success()) 2315 { 2316 owner->SetBreakpointSite (bp_site_sp); 2317 return m_breakpoint_site_list.Add (bp_site_sp); 2318 } 2319 else 2320 { 2321 if (show_error) 2322 { 2323 // Report error for setting breakpoint... 2324 GetTarget().GetDebugger().GetErrorFile()->Printf ("warning: failed to set breakpoint site at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2325 load_addr, 2326 owner->GetBreakpoint().GetID(), 2327 owner->GetID(), 2328 error.AsCString() ? error.AsCString() : "unknown error"); 2329 } 2330 } 2331 } 2332 } 2333 } 2334 // We failed to enable the breakpoint 2335 return LLDB_INVALID_BREAK_ID; 2336 2337 } 2338 2339 void 2340 Process::RemoveOwnerFromBreakpointSite (lldb::user_id_t owner_id, lldb::user_id_t owner_loc_id, BreakpointSiteSP &bp_site_sp) 2341 { 2342 uint32_t num_owners = bp_site_sp->RemoveOwner (owner_id, owner_loc_id); 2343 if (num_owners == 0) 2344 { 2345 // Don't try to disable the site if we don't have a live process anymore. 2346 if (IsAlive()) 2347 DisableBreakpointSite (bp_site_sp.get()); 2348 m_breakpoint_site_list.RemoveByAddress(bp_site_sp->GetLoadAddress()); 2349 } 2350 } 2351 2352 2353 size_t 2354 Process::RemoveBreakpointOpcodesFromBuffer (addr_t bp_addr, size_t size, uint8_t *buf) const 2355 { 2356 size_t bytes_removed = 0; 2357 BreakpointSiteList bp_sites_in_range; 2358 2359 if (m_breakpoint_site_list.FindInRange (bp_addr, bp_addr + size, bp_sites_in_range)) 2360 { 2361 bp_sites_in_range.ForEach([bp_addr, size, buf, &bytes_removed](BreakpointSite *bp_site) -> void { 2362 if (bp_site->GetType() == BreakpointSite::eSoftware) 2363 { 2364 addr_t intersect_addr; 2365 size_t intersect_size; 2366 size_t opcode_offset; 2367 if (bp_site->IntersectsRange(bp_addr, size, &intersect_addr, &intersect_size, &opcode_offset)) 2368 { 2369 assert(bp_addr <= intersect_addr && intersect_addr < bp_addr + size); 2370 assert(bp_addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= bp_addr + size); 2371 assert(opcode_offset + intersect_size <= bp_site->GetByteSize()); 2372 size_t buf_offset = intersect_addr - bp_addr; 2373 ::memcpy(buf + buf_offset, bp_site->GetSavedOpcodeBytes() + opcode_offset, intersect_size); 2374 } 2375 } 2376 }); 2377 } 2378 return bytes_removed; 2379 } 2380 2381 2382 2383 size_t 2384 Process::GetSoftwareBreakpointTrapOpcode (BreakpointSite* bp_site) 2385 { 2386 PlatformSP platform_sp (GetTarget().GetPlatform()); 2387 if (platform_sp) 2388 return platform_sp->GetSoftwareBreakpointTrapOpcode (GetTarget(), bp_site); 2389 return 0; 2390 } 2391 2392 Error 2393 Process::EnableSoftwareBreakpoint (BreakpointSite *bp_site) 2394 { 2395 Error error; 2396 assert (bp_site != NULL); 2397 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2398 const addr_t bp_addr = bp_site->GetLoadAddress(); 2399 if (log) 2400 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64, bp_site->GetID(), (uint64_t)bp_addr); 2401 if (bp_site->IsEnabled()) 2402 { 2403 if (log) 2404 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already enabled", bp_site->GetID(), (uint64_t)bp_addr); 2405 return error; 2406 } 2407 2408 if (bp_addr == LLDB_INVALID_ADDRESS) 2409 { 2410 error.SetErrorString("BreakpointSite contains an invalid load address."); 2411 return error; 2412 } 2413 // Ask the lldb::Process subclass to fill in the correct software breakpoint 2414 // trap for the breakpoint site 2415 const size_t bp_opcode_size = GetSoftwareBreakpointTrapOpcode(bp_site); 2416 2417 if (bp_opcode_size == 0) 2418 { 2419 error.SetErrorStringWithFormat ("Process::GetSoftwareBreakpointTrapOpcode() returned zero, unable to get breakpoint trap for address 0x%" PRIx64, bp_addr); 2420 } 2421 else 2422 { 2423 const uint8_t * const bp_opcode_bytes = bp_site->GetTrapOpcodeBytes(); 2424 2425 if (bp_opcode_bytes == NULL) 2426 { 2427 error.SetErrorString ("BreakpointSite doesn't contain a valid breakpoint trap opcode."); 2428 return error; 2429 } 2430 2431 // Save the original opcode by reading it 2432 if (DoReadMemory(bp_addr, bp_site->GetSavedOpcodeBytes(), bp_opcode_size, error) == bp_opcode_size) 2433 { 2434 // Write a software breakpoint in place of the original opcode 2435 if (DoWriteMemory(bp_addr, bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2436 { 2437 uint8_t verify_bp_opcode_bytes[64]; 2438 if (DoReadMemory(bp_addr, verify_bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2439 { 2440 if (::memcmp(bp_opcode_bytes, verify_bp_opcode_bytes, bp_opcode_size) == 0) 2441 { 2442 bp_site->SetEnabled(true); 2443 bp_site->SetType (BreakpointSite::eSoftware); 2444 if (log) 2445 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", 2446 bp_site->GetID(), 2447 (uint64_t)bp_addr); 2448 } 2449 else 2450 error.SetErrorString("failed to verify the breakpoint trap in memory."); 2451 } 2452 else 2453 error.SetErrorString("Unable to read memory to verify breakpoint trap."); 2454 } 2455 else 2456 error.SetErrorString("Unable to write breakpoint trap to memory."); 2457 } 2458 else 2459 error.SetErrorString("Unable to read memory at breakpoint address."); 2460 } 2461 if (log && error.Fail()) 2462 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2463 bp_site->GetID(), 2464 (uint64_t)bp_addr, 2465 error.AsCString()); 2466 return error; 2467 } 2468 2469 Error 2470 Process::DisableSoftwareBreakpoint (BreakpointSite *bp_site) 2471 { 2472 Error error; 2473 assert (bp_site != NULL); 2474 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2475 addr_t bp_addr = bp_site->GetLoadAddress(); 2476 lldb::user_id_t breakID = bp_site->GetID(); 2477 if (log) 2478 log->Printf ("Process::DisableSoftwareBreakpoint (breakID = %" PRIu64 ") addr = 0x%" PRIx64, breakID, (uint64_t)bp_addr); 2479 2480 if (bp_site->IsHardware()) 2481 { 2482 error.SetErrorString("Breakpoint site is a hardware breakpoint."); 2483 } 2484 else if (bp_site->IsEnabled()) 2485 { 2486 const size_t break_op_size = bp_site->GetByteSize(); 2487 const uint8_t * const break_op = bp_site->GetTrapOpcodeBytes(); 2488 if (break_op_size > 0) 2489 { 2490 // Clear a software breakpoint instruction 2491 uint8_t curr_break_op[8]; 2492 assert (break_op_size <= sizeof(curr_break_op)); 2493 bool break_op_found = false; 2494 2495 // Read the breakpoint opcode 2496 if (DoReadMemory (bp_addr, curr_break_op, break_op_size, error) == break_op_size) 2497 { 2498 bool verify = false; 2499 // Make sure the breakpoint opcode exists at this address 2500 if (::memcmp (curr_break_op, break_op, break_op_size) == 0) 2501 { 2502 break_op_found = true; 2503 // We found a valid breakpoint opcode at this address, now restore 2504 // the saved opcode. 2505 if (DoWriteMemory (bp_addr, bp_site->GetSavedOpcodeBytes(), break_op_size, error) == break_op_size) 2506 { 2507 verify = true; 2508 } 2509 else 2510 error.SetErrorString("Memory write failed when restoring original opcode."); 2511 } 2512 else 2513 { 2514 error.SetErrorString("Original breakpoint trap is no longer in memory."); 2515 // Set verify to true and so we can check if the original opcode has already been restored 2516 verify = true; 2517 } 2518 2519 if (verify) 2520 { 2521 uint8_t verify_opcode[8]; 2522 assert (break_op_size < sizeof(verify_opcode)); 2523 // Verify that our original opcode made it back to the inferior 2524 if (DoReadMemory (bp_addr, verify_opcode, break_op_size, error) == break_op_size) 2525 { 2526 // compare the memory we just read with the original opcode 2527 if (::memcmp (bp_site->GetSavedOpcodeBytes(), verify_opcode, break_op_size) == 0) 2528 { 2529 // SUCCESS 2530 bp_site->SetEnabled(false); 2531 if (log) 2532 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", bp_site->GetID(), (uint64_t)bp_addr); 2533 return error; 2534 } 2535 else 2536 { 2537 if (break_op_found) 2538 error.SetErrorString("Failed to restore original opcode."); 2539 } 2540 } 2541 else 2542 error.SetErrorString("Failed to read memory to verify that breakpoint trap was restored."); 2543 } 2544 } 2545 else 2546 error.SetErrorString("Unable to read memory that should contain the breakpoint trap."); 2547 } 2548 } 2549 else 2550 { 2551 if (log) 2552 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already disabled", bp_site->GetID(), (uint64_t)bp_addr); 2553 return error; 2554 } 2555 2556 if (log) 2557 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2558 bp_site->GetID(), 2559 (uint64_t)bp_addr, 2560 error.AsCString()); 2561 return error; 2562 2563 } 2564 2565 // Uncomment to verify memory caching works after making changes to caching code 2566 //#define VERIFY_MEMORY_READS 2567 2568 size_t 2569 Process::ReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2570 { 2571 error.Clear(); 2572 if (!GetDisableMemoryCache()) 2573 { 2574 #if defined (VERIFY_MEMORY_READS) 2575 // Memory caching is enabled, with debug verification 2576 2577 if (buf && size) 2578 { 2579 // Uncomment the line below to make sure memory caching is working. 2580 // I ran this through the test suite and got no assertions, so I am 2581 // pretty confident this is working well. If any changes are made to 2582 // memory caching, uncomment the line below and test your changes! 2583 2584 // Verify all memory reads by using the cache first, then redundantly 2585 // reading the same memory from the inferior and comparing to make sure 2586 // everything is exactly the same. 2587 std::string verify_buf (size, '\0'); 2588 assert (verify_buf.size() == size); 2589 const size_t cache_bytes_read = m_memory_cache.Read (this, addr, buf, size, error); 2590 Error verify_error; 2591 const size_t verify_bytes_read = ReadMemoryFromInferior (addr, const_cast<char *>(verify_buf.data()), verify_buf.size(), verify_error); 2592 assert (cache_bytes_read == verify_bytes_read); 2593 assert (memcmp(buf, verify_buf.data(), verify_buf.size()) == 0); 2594 assert (verify_error.Success() == error.Success()); 2595 return cache_bytes_read; 2596 } 2597 return 0; 2598 #else // !defined(VERIFY_MEMORY_READS) 2599 // Memory caching is enabled, without debug verification 2600 2601 return m_memory_cache.Read (addr, buf, size, error); 2602 #endif // defined (VERIFY_MEMORY_READS) 2603 } 2604 else 2605 { 2606 // Memory caching is disabled 2607 2608 return ReadMemoryFromInferior (addr, buf, size, error); 2609 } 2610 } 2611 2612 size_t 2613 Process::ReadCStringFromMemory (addr_t addr, std::string &out_str, Error &error) 2614 { 2615 char buf[256]; 2616 out_str.clear(); 2617 addr_t curr_addr = addr; 2618 while (1) 2619 { 2620 size_t length = ReadCStringFromMemory (curr_addr, buf, sizeof(buf), error); 2621 if (length == 0) 2622 break; 2623 out_str.append(buf, length); 2624 // If we got "length - 1" bytes, we didn't get the whole C string, we 2625 // need to read some more characters 2626 if (length == sizeof(buf) - 1) 2627 curr_addr += length; 2628 else 2629 break; 2630 } 2631 return out_str.size(); 2632 } 2633 2634 2635 size_t 2636 Process::ReadStringFromMemory (addr_t addr, char *dst, size_t max_bytes, Error &error, 2637 size_t type_width) 2638 { 2639 size_t total_bytes_read = 0; 2640 if (dst && max_bytes && type_width && max_bytes >= type_width) 2641 { 2642 // Ensure a null terminator independent of the number of bytes that is read. 2643 memset (dst, 0, max_bytes); 2644 size_t bytes_left = max_bytes - type_width; 2645 2646 const char terminator[4] = {'\0', '\0', '\0', '\0'}; 2647 assert(sizeof(terminator) >= type_width && 2648 "Attempting to validate a string with more than 4 bytes per character!"); 2649 2650 addr_t curr_addr = addr; 2651 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2652 char *curr_dst = dst; 2653 2654 error.Clear(); 2655 while (bytes_left > 0 && error.Success()) 2656 { 2657 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2658 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2659 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2660 2661 if (bytes_read == 0) 2662 break; 2663 2664 // Search for a null terminator of correct size and alignment in bytes_read 2665 size_t aligned_start = total_bytes_read - total_bytes_read % type_width; 2666 for (size_t i = aligned_start; i + type_width <= total_bytes_read + bytes_read; i += type_width) 2667 if (::strncmp(&dst[i], terminator, type_width) == 0) 2668 { 2669 error.Clear(); 2670 return i; 2671 } 2672 2673 total_bytes_read += bytes_read; 2674 curr_dst += bytes_read; 2675 curr_addr += bytes_read; 2676 bytes_left -= bytes_read; 2677 } 2678 } 2679 else 2680 { 2681 if (max_bytes) 2682 error.SetErrorString("invalid arguments"); 2683 } 2684 return total_bytes_read; 2685 } 2686 2687 // Deprecated in favor of ReadStringFromMemory which has wchar support and correct code to find 2688 // null terminators. 2689 size_t 2690 Process::ReadCStringFromMemory (addr_t addr, char *dst, size_t dst_max_len, Error &result_error) 2691 { 2692 size_t total_cstr_len = 0; 2693 if (dst && dst_max_len) 2694 { 2695 result_error.Clear(); 2696 // NULL out everything just to be safe 2697 memset (dst, 0, dst_max_len); 2698 Error error; 2699 addr_t curr_addr = addr; 2700 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2701 size_t bytes_left = dst_max_len - 1; 2702 char *curr_dst = dst; 2703 2704 while (bytes_left > 0) 2705 { 2706 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2707 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2708 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2709 2710 if (bytes_read == 0) 2711 { 2712 result_error = error; 2713 dst[total_cstr_len] = '\0'; 2714 break; 2715 } 2716 const size_t len = strlen(curr_dst); 2717 2718 total_cstr_len += len; 2719 2720 if (len < bytes_to_read) 2721 break; 2722 2723 curr_dst += bytes_read; 2724 curr_addr += bytes_read; 2725 bytes_left -= bytes_read; 2726 } 2727 } 2728 else 2729 { 2730 if (dst == NULL) 2731 result_error.SetErrorString("invalid arguments"); 2732 else 2733 result_error.Clear(); 2734 } 2735 return total_cstr_len; 2736 } 2737 2738 size_t 2739 Process::ReadMemoryFromInferior (addr_t addr, void *buf, size_t size, Error &error) 2740 { 2741 if (buf == NULL || size == 0) 2742 return 0; 2743 2744 size_t bytes_read = 0; 2745 uint8_t *bytes = (uint8_t *)buf; 2746 2747 while (bytes_read < size) 2748 { 2749 const size_t curr_size = size - bytes_read; 2750 const size_t curr_bytes_read = DoReadMemory (addr + bytes_read, 2751 bytes + bytes_read, 2752 curr_size, 2753 error); 2754 bytes_read += curr_bytes_read; 2755 if (curr_bytes_read == curr_size || curr_bytes_read == 0) 2756 break; 2757 } 2758 2759 // Replace any software breakpoint opcodes that fall into this range back 2760 // into "buf" before we return 2761 if (bytes_read > 0) 2762 RemoveBreakpointOpcodesFromBuffer (addr, bytes_read, (uint8_t *)buf); 2763 return bytes_read; 2764 } 2765 2766 uint64_t 2767 Process::ReadUnsignedIntegerFromMemory (lldb::addr_t vm_addr, size_t integer_byte_size, uint64_t fail_value, Error &error) 2768 { 2769 Scalar scalar; 2770 if (ReadScalarIntegerFromMemory(vm_addr, integer_byte_size, false, scalar, error)) 2771 return scalar.ULongLong(fail_value); 2772 return fail_value; 2773 } 2774 2775 addr_t 2776 Process::ReadPointerFromMemory (lldb::addr_t vm_addr, Error &error) 2777 { 2778 Scalar scalar; 2779 if (ReadScalarIntegerFromMemory(vm_addr, GetAddressByteSize(), false, scalar, error)) 2780 return scalar.ULongLong(LLDB_INVALID_ADDRESS); 2781 return LLDB_INVALID_ADDRESS; 2782 } 2783 2784 2785 bool 2786 Process::WritePointerToMemory (lldb::addr_t vm_addr, 2787 lldb::addr_t ptr_value, 2788 Error &error) 2789 { 2790 Scalar scalar; 2791 const uint32_t addr_byte_size = GetAddressByteSize(); 2792 if (addr_byte_size <= 4) 2793 scalar = (uint32_t)ptr_value; 2794 else 2795 scalar = ptr_value; 2796 return WriteScalarToMemory(vm_addr, scalar, addr_byte_size, error) == addr_byte_size; 2797 } 2798 2799 size_t 2800 Process::WriteMemoryPrivate (addr_t addr, const void *buf, size_t size, Error &error) 2801 { 2802 size_t bytes_written = 0; 2803 const uint8_t *bytes = (const uint8_t *)buf; 2804 2805 while (bytes_written < size) 2806 { 2807 const size_t curr_size = size - bytes_written; 2808 const size_t curr_bytes_written = DoWriteMemory (addr + bytes_written, 2809 bytes + bytes_written, 2810 curr_size, 2811 error); 2812 bytes_written += curr_bytes_written; 2813 if (curr_bytes_written == curr_size || curr_bytes_written == 0) 2814 break; 2815 } 2816 return bytes_written; 2817 } 2818 2819 size_t 2820 Process::WriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2821 { 2822 #if defined (ENABLE_MEMORY_CACHING) 2823 m_memory_cache.Flush (addr, size); 2824 #endif 2825 2826 if (buf == NULL || size == 0) 2827 return 0; 2828 2829 m_mod_id.BumpMemoryID(); 2830 2831 // We need to write any data that would go where any current software traps 2832 // (enabled software breakpoints) any software traps (breakpoints) that we 2833 // may have placed in our tasks memory. 2834 2835 BreakpointSiteList bp_sites_in_range; 2836 2837 if (m_breakpoint_site_list.FindInRange (addr, addr + size, bp_sites_in_range)) 2838 { 2839 // No breakpoint sites overlap 2840 if (bp_sites_in_range.IsEmpty()) 2841 return WriteMemoryPrivate (addr, buf, size, error); 2842 else 2843 { 2844 const uint8_t *ubuf = (const uint8_t *)buf; 2845 uint64_t bytes_written = 0; 2846 2847 bp_sites_in_range.ForEach([this, addr, size, &bytes_written, &ubuf, &error](BreakpointSite *bp) -> void { 2848 2849 if (error.Success()) 2850 { 2851 addr_t intersect_addr; 2852 size_t intersect_size; 2853 size_t opcode_offset; 2854 const bool intersects = bp->IntersectsRange(addr, size, &intersect_addr, &intersect_size, &opcode_offset); 2855 UNUSED_IF_ASSERT_DISABLED(intersects); 2856 assert(intersects); 2857 assert(addr <= intersect_addr && intersect_addr < addr + size); 2858 assert(addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= addr + size); 2859 assert(opcode_offset + intersect_size <= bp->GetByteSize()); 2860 2861 // Check for bytes before this breakpoint 2862 const addr_t curr_addr = addr + bytes_written; 2863 if (intersect_addr > curr_addr) 2864 { 2865 // There are some bytes before this breakpoint that we need to 2866 // just write to memory 2867 size_t curr_size = intersect_addr - curr_addr; 2868 size_t curr_bytes_written = WriteMemoryPrivate (curr_addr, 2869 ubuf + bytes_written, 2870 curr_size, 2871 error); 2872 bytes_written += curr_bytes_written; 2873 if (curr_bytes_written != curr_size) 2874 { 2875 // We weren't able to write all of the requested bytes, we 2876 // are done looping and will return the number of bytes that 2877 // we have written so far. 2878 if (error.Success()) 2879 error.SetErrorToGenericError(); 2880 } 2881 } 2882 // Now write any bytes that would cover up any software breakpoints 2883 // directly into the breakpoint opcode buffer 2884 ::memcpy(bp->GetSavedOpcodeBytes() + opcode_offset, ubuf + bytes_written, intersect_size); 2885 bytes_written += intersect_size; 2886 } 2887 }); 2888 2889 if (bytes_written < size) 2890 WriteMemoryPrivate (addr + bytes_written, 2891 ubuf + bytes_written, 2892 size - bytes_written, 2893 error); 2894 } 2895 } 2896 else 2897 { 2898 return WriteMemoryPrivate (addr, buf, size, error); 2899 } 2900 2901 // Write any remaining bytes after the last breakpoint if we have any left 2902 return 0; //bytes_written; 2903 } 2904 2905 size_t 2906 Process::WriteScalarToMemory (addr_t addr, const Scalar &scalar, size_t byte_size, Error &error) 2907 { 2908 if (byte_size == UINT32_MAX) 2909 byte_size = scalar.GetByteSize(); 2910 if (byte_size > 0) 2911 { 2912 uint8_t buf[32]; 2913 const size_t mem_size = scalar.GetAsMemoryData (buf, byte_size, GetByteOrder(), error); 2914 if (mem_size > 0) 2915 return WriteMemory(addr, buf, mem_size, error); 2916 else 2917 error.SetErrorString ("failed to get scalar as memory data"); 2918 } 2919 else 2920 { 2921 error.SetErrorString ("invalid scalar value"); 2922 } 2923 return 0; 2924 } 2925 2926 size_t 2927 Process::ReadScalarIntegerFromMemory (addr_t addr, 2928 uint32_t byte_size, 2929 bool is_signed, 2930 Scalar &scalar, 2931 Error &error) 2932 { 2933 uint64_t uval = 0; 2934 if (byte_size == 0) 2935 { 2936 error.SetErrorString ("byte size is zero"); 2937 } 2938 else if (byte_size & (byte_size - 1)) 2939 { 2940 error.SetErrorStringWithFormat ("byte size %u is not a power of 2", byte_size); 2941 } 2942 else if (byte_size <= sizeof(uval)) 2943 { 2944 const size_t bytes_read = ReadMemory (addr, &uval, byte_size, error); 2945 if (bytes_read == byte_size) 2946 { 2947 DataExtractor data (&uval, sizeof(uval), GetByteOrder(), GetAddressByteSize()); 2948 lldb::offset_t offset = 0; 2949 if (byte_size <= 4) 2950 scalar = data.GetMaxU32 (&offset, byte_size); 2951 else 2952 scalar = data.GetMaxU64 (&offset, byte_size); 2953 if (is_signed) 2954 scalar.SignExtend(byte_size * 8); 2955 return bytes_read; 2956 } 2957 } 2958 else 2959 { 2960 error.SetErrorStringWithFormat ("byte size of %u is too large for integer scalar type", byte_size); 2961 } 2962 return 0; 2963 } 2964 2965 #define USE_ALLOCATE_MEMORY_CACHE 1 2966 addr_t 2967 Process::AllocateMemory(size_t size, uint32_t permissions, Error &error) 2968 { 2969 if (GetPrivateState() != eStateStopped) 2970 return LLDB_INVALID_ADDRESS; 2971 2972 #if defined (USE_ALLOCATE_MEMORY_CACHE) 2973 return m_allocated_memory_cache.AllocateMemory(size, permissions, error); 2974 #else 2975 addr_t allocated_addr = DoAllocateMemory (size, permissions, error); 2976 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2977 if (log) 2978 log->Printf("Process::AllocateMemory(size=%" PRIu64 ", permissions=%s) => 0x%16.16" PRIx64 " (m_stop_id = %u m_memory_id = %u)", 2979 (uint64_t)size, 2980 GetPermissionsAsCString (permissions), 2981 (uint64_t)allocated_addr, 2982 m_mod_id.GetStopID(), 2983 m_mod_id.GetMemoryID()); 2984 return allocated_addr; 2985 #endif 2986 } 2987 2988 bool 2989 Process::CanJIT () 2990 { 2991 if (m_can_jit == eCanJITDontKnow) 2992 { 2993 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2994 Error err; 2995 2996 uint64_t allocated_memory = AllocateMemory(8, 2997 ePermissionsReadable | ePermissionsWritable | ePermissionsExecutable, 2998 err); 2999 3000 if (err.Success()) 3001 { 3002 m_can_jit = eCanJITYes; 3003 if (log) 3004 log->Printf ("Process::%s pid %" PRIu64 " allocation test passed, CanJIT () is true", __FUNCTION__, GetID ()); 3005 } 3006 else 3007 { 3008 m_can_jit = eCanJITNo; 3009 if (log) 3010 log->Printf ("Process::%s pid %" PRIu64 " allocation test failed, CanJIT () is false: %s", __FUNCTION__, GetID (), err.AsCString ()); 3011 } 3012 3013 DeallocateMemory (allocated_memory); 3014 } 3015 3016 return m_can_jit == eCanJITYes; 3017 } 3018 3019 void 3020 Process::SetCanJIT (bool can_jit) 3021 { 3022 m_can_jit = (can_jit ? eCanJITYes : eCanJITNo); 3023 } 3024 3025 void 3026 Process::SetCanRunCode (bool can_run_code) 3027 { 3028 SetCanJIT(can_run_code); 3029 m_can_interpret_function_calls = can_run_code; 3030 } 3031 3032 Error 3033 Process::DeallocateMemory (addr_t ptr) 3034 { 3035 Error error; 3036 #if defined (USE_ALLOCATE_MEMORY_CACHE) 3037 if (!m_allocated_memory_cache.DeallocateMemory(ptr)) 3038 { 3039 error.SetErrorStringWithFormat ("deallocation of memory at 0x%" PRIx64 " failed.", (uint64_t)ptr); 3040 } 3041 #else 3042 error = DoDeallocateMemory (ptr); 3043 3044 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3045 if (log) 3046 log->Printf("Process::DeallocateMemory(addr=0x%16.16" PRIx64 ") => err = %s (m_stop_id = %u, m_memory_id = %u)", 3047 ptr, 3048 error.AsCString("SUCCESS"), 3049 m_mod_id.GetStopID(), 3050 m_mod_id.GetMemoryID()); 3051 #endif 3052 return error; 3053 } 3054 3055 3056 ModuleSP 3057 Process::ReadModuleFromMemory (const FileSpec& file_spec, 3058 lldb::addr_t header_addr, 3059 size_t size_to_read) 3060 { 3061 Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST); 3062 if (log) 3063 { 3064 log->Printf ("Process::ReadModuleFromMemory reading %s binary from memory", file_spec.GetPath().c_str()); 3065 } 3066 ModuleSP module_sp (new Module (file_spec, ArchSpec())); 3067 if (module_sp) 3068 { 3069 Error error; 3070 ObjectFile *objfile = module_sp->GetMemoryObjectFile (shared_from_this(), header_addr, error, size_to_read); 3071 if (objfile) 3072 return module_sp; 3073 } 3074 return ModuleSP(); 3075 } 3076 3077 bool 3078 Process::GetLoadAddressPermissions (lldb::addr_t load_addr, uint32_t &permissions) 3079 { 3080 MemoryRegionInfo range_info; 3081 permissions = 0; 3082 Error error (GetMemoryRegionInfo (load_addr, range_info)); 3083 if (!error.Success()) 3084 return false; 3085 if (range_info.GetReadable() == MemoryRegionInfo::eDontKnow 3086 || range_info.GetWritable() == MemoryRegionInfo::eDontKnow 3087 || range_info.GetExecutable() == MemoryRegionInfo::eDontKnow) 3088 { 3089 return false; 3090 } 3091 3092 if (range_info.GetReadable() == MemoryRegionInfo::eYes) 3093 permissions |= lldb::ePermissionsReadable; 3094 3095 if (range_info.GetWritable() == MemoryRegionInfo::eYes) 3096 permissions |= lldb::ePermissionsWritable; 3097 3098 if (range_info.GetExecutable() == MemoryRegionInfo::eYes) 3099 permissions |= lldb::ePermissionsExecutable; 3100 3101 return true; 3102 } 3103 3104 Error 3105 Process::EnableWatchpoint (Watchpoint *watchpoint, bool notify) 3106 { 3107 Error error; 3108 error.SetErrorString("watchpoints are not supported"); 3109 return error; 3110 } 3111 3112 Error 3113 Process::DisableWatchpoint (Watchpoint *watchpoint, bool notify) 3114 { 3115 Error error; 3116 error.SetErrorString("watchpoints are not supported"); 3117 return error; 3118 } 3119 3120 StateType 3121 Process::WaitForProcessStopPrivate (const TimeValue *timeout, EventSP &event_sp) 3122 { 3123 StateType state; 3124 // Now wait for the process to launch and return control to us, and then 3125 // call DidLaunch: 3126 while (1) 3127 { 3128 event_sp.reset(); 3129 state = WaitForStateChangedEventsPrivate (timeout, event_sp); 3130 3131 if (StateIsStoppedState(state, false)) 3132 break; 3133 3134 // If state is invalid, then we timed out 3135 if (state == eStateInvalid) 3136 break; 3137 3138 if (event_sp) 3139 HandlePrivateEvent (event_sp); 3140 } 3141 return state; 3142 } 3143 3144 void 3145 Process::LoadOperatingSystemPlugin(bool flush) 3146 { 3147 if (flush) 3148 m_thread_list.Clear(); 3149 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3150 if (flush) 3151 Flush(); 3152 } 3153 3154 Error 3155 Process::Launch (ProcessLaunchInfo &launch_info) 3156 { 3157 Error error; 3158 m_abi_sp.reset(); 3159 m_dyld_ap.reset(); 3160 m_jit_loaders_ap.reset(); 3161 m_system_runtime_ap.reset(); 3162 m_os_ap.reset(); 3163 m_process_input_reader.reset(); 3164 m_stop_info_override_callback = NULL; 3165 3166 Module *exe_module = GetTarget().GetExecutableModulePointer(); 3167 if (exe_module) 3168 { 3169 char local_exec_file_path[PATH_MAX]; 3170 char platform_exec_file_path[PATH_MAX]; 3171 exe_module->GetFileSpec().GetPath(local_exec_file_path, sizeof(local_exec_file_path)); 3172 exe_module->GetPlatformFileSpec().GetPath(platform_exec_file_path, sizeof(platform_exec_file_path)); 3173 if (exe_module->GetFileSpec().Exists()) 3174 { 3175 // Install anything that might need to be installed prior to launching. 3176 // For host systems, this will do nothing, but if we are connected to a 3177 // remote platform it will install any needed binaries 3178 error = GetTarget().Install(&launch_info); 3179 if (error.Fail()) 3180 return error; 3181 3182 if (PrivateStateThreadIsValid ()) 3183 PausePrivateStateThread (); 3184 3185 error = WillLaunch (exe_module); 3186 if (error.Success()) 3187 { 3188 const bool restarted = false; 3189 SetPublicState (eStateLaunching, restarted); 3190 m_should_detach = false; 3191 3192 if (m_public_run_lock.TrySetRunning()) 3193 { 3194 // Now launch using these arguments. 3195 error = DoLaunch (exe_module, launch_info); 3196 } 3197 else 3198 { 3199 // This shouldn't happen 3200 error.SetErrorString("failed to acquire process run lock"); 3201 } 3202 3203 if (error.Fail()) 3204 { 3205 if (GetID() != LLDB_INVALID_PROCESS_ID) 3206 { 3207 SetID (LLDB_INVALID_PROCESS_ID); 3208 const char *error_string = error.AsCString(); 3209 if (error_string == NULL) 3210 error_string = "launch failed"; 3211 SetExitStatus (-1, error_string); 3212 } 3213 } 3214 else 3215 { 3216 EventSP event_sp; 3217 TimeValue timeout_time; 3218 timeout_time = TimeValue::Now(); 3219 timeout_time.OffsetWithSeconds(10); 3220 StateType state = WaitForProcessStopPrivate(&timeout_time, event_sp); 3221 3222 if (state == eStateInvalid || event_sp.get() == NULL) 3223 { 3224 // We were able to launch the process, but we failed to 3225 // catch the initial stop. 3226 error.SetErrorString ("failed to catch stop after launch"); 3227 SetExitStatus (0, "failed to catch stop after launch"); 3228 Destroy(false); 3229 } 3230 else if (state == eStateStopped || state == eStateCrashed) 3231 { 3232 3233 DidLaunch (); 3234 3235 DynamicLoader *dyld = GetDynamicLoader (); 3236 if (dyld) 3237 dyld->DidLaunch(); 3238 3239 GetJITLoaders().DidLaunch(); 3240 3241 SystemRuntime *system_runtime = GetSystemRuntime (); 3242 if (system_runtime) 3243 system_runtime->DidLaunch(); 3244 3245 LoadOperatingSystemPlugin(false); 3246 3247 // Note, the stop event was consumed above, but not handled. This was done 3248 // to give DidLaunch a chance to run. The target is either stopped or crashed. 3249 // Directly set the state. This is done to prevent a stop message with a bunch 3250 // of spurious output on thread status, as well as not pop a ProcessIOHandler. 3251 SetPublicState(state, false); 3252 3253 if (PrivateStateThreadIsValid ()) 3254 ResumePrivateStateThread (); 3255 else 3256 StartPrivateStateThread (); 3257 3258 m_stop_info_override_callback = GetTarget().GetArchitecture().GetStopInfoOverrideCallback(); 3259 3260 // Target was stopped at entry as was intended. Need to notify the listeners 3261 // about it. 3262 if (state == eStateStopped && launch_info.GetFlags().Test(eLaunchFlagStopAtEntry)) 3263 HandlePrivateEvent(event_sp); 3264 } 3265 else if (state == eStateExited) 3266 { 3267 // We exited while trying to launch somehow. Don't call DidLaunch as that's 3268 // not likely to work, and return an invalid pid. 3269 HandlePrivateEvent (event_sp); 3270 } 3271 } 3272 } 3273 } 3274 else 3275 { 3276 error.SetErrorStringWithFormat("file doesn't exist: '%s'", local_exec_file_path); 3277 } 3278 } 3279 return error; 3280 } 3281 3282 3283 Error 3284 Process::LoadCore () 3285 { 3286 Error error = DoLoadCore(); 3287 if (error.Success()) 3288 { 3289 Listener listener ("lldb.process.load_core_listener"); 3290 HijackProcessEvents(&listener); 3291 3292 if (PrivateStateThreadIsValid ()) 3293 ResumePrivateStateThread (); 3294 else 3295 StartPrivateStateThread (); 3296 3297 DynamicLoader *dyld = GetDynamicLoader (); 3298 if (dyld) 3299 dyld->DidAttach(); 3300 3301 GetJITLoaders().DidAttach(); 3302 3303 SystemRuntime *system_runtime = GetSystemRuntime (); 3304 if (system_runtime) 3305 system_runtime->DidAttach(); 3306 3307 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3308 // We successfully loaded a core file, now pretend we stopped so we can 3309 // show all of the threads in the core file and explore the crashed 3310 // state. 3311 SetPrivateState (eStateStopped); 3312 3313 // Wait indefinitely for a stopped event since we just posted one above... 3314 lldb::EventSP event_sp; 3315 listener.WaitForEvent (NULL, event_sp); 3316 StateType state = ProcessEventData::GetStateFromEvent(event_sp.get()); 3317 3318 if (!StateIsStoppedState (state, false)) 3319 { 3320 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3321 if (log) 3322 log->Printf("Process::Halt() failed to stop, state is: %s", StateAsCString(state)); 3323 error.SetErrorString ("Did not get stopped event after loading the core file."); 3324 } 3325 RestoreProcessEvents (); 3326 } 3327 return error; 3328 } 3329 3330 DynamicLoader * 3331 Process::GetDynamicLoader () 3332 { 3333 if (m_dyld_ap.get() == NULL) 3334 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 3335 return m_dyld_ap.get(); 3336 } 3337 3338 const lldb::DataBufferSP 3339 Process::GetAuxvData() 3340 { 3341 return DataBufferSP (); 3342 } 3343 3344 JITLoaderList & 3345 Process::GetJITLoaders () 3346 { 3347 if (!m_jit_loaders_ap) 3348 { 3349 m_jit_loaders_ap.reset(new JITLoaderList()); 3350 JITLoader::LoadPlugins(this, *m_jit_loaders_ap); 3351 } 3352 return *m_jit_loaders_ap; 3353 } 3354 3355 SystemRuntime * 3356 Process::GetSystemRuntime () 3357 { 3358 if (m_system_runtime_ap.get() == NULL) 3359 m_system_runtime_ap.reset (SystemRuntime::FindPlugin(this)); 3360 return m_system_runtime_ap.get(); 3361 } 3362 3363 Process::AttachCompletionHandler::AttachCompletionHandler (Process *process, uint32_t exec_count) : 3364 NextEventAction (process), 3365 m_exec_count (exec_count) 3366 { 3367 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3368 if (log) 3369 log->Printf ("Process::AttachCompletionHandler::%s process=%p, exec_count=%" PRIu32, __FUNCTION__, static_cast<void*>(process), exec_count); 3370 } 3371 3372 Process::NextEventAction::EventActionResult 3373 Process::AttachCompletionHandler::PerformAction (lldb::EventSP &event_sp) 3374 { 3375 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3376 3377 StateType state = ProcessEventData::GetStateFromEvent (event_sp.get()); 3378 if (log) 3379 log->Printf ("Process::AttachCompletionHandler::%s called with state %s (%d)", __FUNCTION__, StateAsCString(state), static_cast<int> (state)); 3380 3381 switch (state) 3382 { 3383 case eStateAttaching: 3384 return eEventActionSuccess; 3385 3386 case eStateRunning: 3387 case eStateConnected: 3388 return eEventActionRetry; 3389 3390 case eStateStopped: 3391 case eStateCrashed: 3392 { 3393 // During attach, prior to sending the eStateStopped event, 3394 // lldb_private::Process subclasses must set the new process ID. 3395 assert (m_process->GetID() != LLDB_INVALID_PROCESS_ID); 3396 // We don't want these events to be reported, so go set the ShouldReportStop here: 3397 m_process->GetThreadList().SetShouldReportStop (eVoteNo); 3398 3399 if (m_exec_count > 0) 3400 { 3401 --m_exec_count; 3402 3403 if (log) 3404 log->Printf ("Process::AttachCompletionHandler::%s state %s: reduced remaining exec count to %" PRIu32 ", requesting resume", __FUNCTION__, StateAsCString(state), m_exec_count); 3405 3406 RequestResume(); 3407 return eEventActionRetry; 3408 } 3409 else 3410 { 3411 if (log) 3412 log->Printf ("Process::AttachCompletionHandler::%s state %s: no more execs expected to start, continuing with attach", __FUNCTION__, StateAsCString(state)); 3413 3414 m_process->CompleteAttach (); 3415 return eEventActionSuccess; 3416 } 3417 } 3418 break; 3419 3420 default: 3421 case eStateExited: 3422 case eStateInvalid: 3423 break; 3424 } 3425 3426 m_exit_string.assign ("No valid Process"); 3427 return eEventActionExit; 3428 } 3429 3430 Process::NextEventAction::EventActionResult 3431 Process::AttachCompletionHandler::HandleBeingInterrupted() 3432 { 3433 return eEventActionSuccess; 3434 } 3435 3436 const char * 3437 Process::AttachCompletionHandler::GetExitString () 3438 { 3439 return m_exit_string.c_str(); 3440 } 3441 3442 Listener & 3443 ProcessAttachInfo::GetListenerForProcess (Debugger &debugger) 3444 { 3445 if (m_listener_sp) 3446 return *m_listener_sp; 3447 else 3448 return debugger.GetListener(); 3449 } 3450 3451 Error 3452 Process::Attach (ProcessAttachInfo &attach_info) 3453 { 3454 m_abi_sp.reset(); 3455 m_process_input_reader.reset(); 3456 m_dyld_ap.reset(); 3457 m_jit_loaders_ap.reset(); 3458 m_system_runtime_ap.reset(); 3459 m_os_ap.reset(); 3460 m_stop_info_override_callback = NULL; 3461 3462 lldb::pid_t attach_pid = attach_info.GetProcessID(); 3463 Error error; 3464 if (attach_pid == LLDB_INVALID_PROCESS_ID) 3465 { 3466 char process_name[PATH_MAX]; 3467 3468 if (attach_info.GetExecutableFile().GetPath (process_name, sizeof(process_name))) 3469 { 3470 const bool wait_for_launch = attach_info.GetWaitForLaunch(); 3471 3472 if (wait_for_launch) 3473 { 3474 error = WillAttachToProcessWithName(process_name, wait_for_launch); 3475 if (error.Success()) 3476 { 3477 if (m_public_run_lock.TrySetRunning()) 3478 { 3479 m_should_detach = true; 3480 const bool restarted = false; 3481 SetPublicState (eStateAttaching, restarted); 3482 // Now attach using these arguments. 3483 error = DoAttachToProcessWithName (process_name, attach_info); 3484 } 3485 else 3486 { 3487 // This shouldn't happen 3488 error.SetErrorString("failed to acquire process run lock"); 3489 } 3490 3491 if (error.Fail()) 3492 { 3493 if (GetID() != LLDB_INVALID_PROCESS_ID) 3494 { 3495 SetID (LLDB_INVALID_PROCESS_ID); 3496 if (error.AsCString() == NULL) 3497 error.SetErrorString("attach failed"); 3498 3499 SetExitStatus(-1, error.AsCString()); 3500 } 3501 } 3502 else 3503 { 3504 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3505 StartPrivateStateThread(); 3506 } 3507 return error; 3508 } 3509 } 3510 else 3511 { 3512 ProcessInstanceInfoList process_infos; 3513 PlatformSP platform_sp (GetTarget().GetPlatform ()); 3514 3515 if (platform_sp) 3516 { 3517 ProcessInstanceInfoMatch match_info; 3518 match_info.GetProcessInfo() = attach_info; 3519 match_info.SetNameMatchType (eNameMatchEquals); 3520 platform_sp->FindProcesses (match_info, process_infos); 3521 const uint32_t num_matches = process_infos.GetSize(); 3522 if (num_matches == 1) 3523 { 3524 attach_pid = process_infos.GetProcessIDAtIndex(0); 3525 // Fall through and attach using the above process ID 3526 } 3527 else 3528 { 3529 match_info.GetProcessInfo().GetExecutableFile().GetPath (process_name, sizeof(process_name)); 3530 if (num_matches > 1) 3531 { 3532 StreamString s; 3533 ProcessInstanceInfo::DumpTableHeader (s, platform_sp.get(), true, false); 3534 for (size_t i = 0; i < num_matches; i++) 3535 { 3536 process_infos.GetProcessInfoAtIndex(i).DumpAsTableRow(s, platform_sp.get(), true, false); 3537 } 3538 error.SetErrorStringWithFormat ("more than one process named %s:\n%s", 3539 process_name, 3540 s.GetData()); 3541 } 3542 else 3543 error.SetErrorStringWithFormat ("could not find a process named %s", process_name); 3544 } 3545 } 3546 else 3547 { 3548 error.SetErrorString ("invalid platform, can't find processes by name"); 3549 return error; 3550 } 3551 } 3552 } 3553 else 3554 { 3555 error.SetErrorString ("invalid process name"); 3556 } 3557 } 3558 3559 if (attach_pid != LLDB_INVALID_PROCESS_ID) 3560 { 3561 error = WillAttachToProcessWithID(attach_pid); 3562 if (error.Success()) 3563 { 3564 3565 if (m_public_run_lock.TrySetRunning()) 3566 { 3567 // Now attach using these arguments. 3568 m_should_detach = true; 3569 const bool restarted = false; 3570 SetPublicState (eStateAttaching, restarted); 3571 error = DoAttachToProcessWithID (attach_pid, attach_info); 3572 } 3573 else 3574 { 3575 // This shouldn't happen 3576 error.SetErrorString("failed to acquire process run lock"); 3577 } 3578 3579 if (error.Success()) 3580 { 3581 3582 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3583 StartPrivateStateThread(); 3584 } 3585 else 3586 { 3587 if (GetID() != LLDB_INVALID_PROCESS_ID) 3588 SetID (LLDB_INVALID_PROCESS_ID); 3589 3590 const char *error_string = error.AsCString(); 3591 if (error_string == NULL) 3592 error_string = "attach failed"; 3593 3594 SetExitStatus(-1, error_string); 3595 } 3596 } 3597 } 3598 return error; 3599 } 3600 3601 void 3602 Process::CompleteAttach () 3603 { 3604 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3605 if (log) 3606 log->Printf ("Process::%s()", __FUNCTION__); 3607 3608 // Let the process subclass figure out at much as it can about the process 3609 // before we go looking for a dynamic loader plug-in. 3610 ArchSpec process_arch; 3611 DidAttach(process_arch); 3612 3613 if (process_arch.IsValid()) 3614 { 3615 GetTarget().SetArchitecture(process_arch); 3616 if (log) 3617 { 3618 const char *triple_str = process_arch.GetTriple().getTriple().c_str (); 3619 log->Printf ("Process::%s replacing process architecture with DidAttach() architecture: %s", 3620 __FUNCTION__, 3621 triple_str ? triple_str : "<null>"); 3622 } 3623 } 3624 3625 // We just attached. If we have a platform, ask it for the process architecture, and if it isn't 3626 // the same as the one we've already set, switch architectures. 3627 PlatformSP platform_sp (GetTarget().GetPlatform ()); 3628 assert (platform_sp.get()); 3629 if (platform_sp) 3630 { 3631 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 3632 if (target_arch.IsValid() && !platform_sp->IsCompatibleArchitecture (target_arch, false, NULL)) 3633 { 3634 ArchSpec platform_arch; 3635 platform_sp = platform_sp->GetPlatformForArchitecture (target_arch, &platform_arch); 3636 if (platform_sp) 3637 { 3638 GetTarget().SetPlatform (platform_sp); 3639 GetTarget().SetArchitecture(platform_arch); 3640 if (log) 3641 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 ()); 3642 } 3643 } 3644 else if (!process_arch.IsValid()) 3645 { 3646 ProcessInstanceInfo process_info; 3647 platform_sp->GetProcessInfo (GetID(), process_info); 3648 const ArchSpec &process_arch = process_info.GetArchitecture(); 3649 if (process_arch.IsValid() && !GetTarget().GetArchitecture().IsExactMatch(process_arch)) 3650 { 3651 GetTarget().SetArchitecture (process_arch); 3652 if (log) 3653 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 ()); 3654 } 3655 } 3656 } 3657 3658 // We have completed the attach, now it is time to find the dynamic loader 3659 // plug-in 3660 DynamicLoader *dyld = GetDynamicLoader (); 3661 if (dyld) 3662 { 3663 dyld->DidAttach(); 3664 if (log) 3665 { 3666 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3667 log->Printf ("Process::%s after DynamicLoader::DidAttach(), target executable is %s (using %s plugin)", 3668 __FUNCTION__, 3669 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>", 3670 dyld->GetPluginName().AsCString ("<unnamed>")); 3671 } 3672 } 3673 3674 GetJITLoaders().DidAttach(); 3675 3676 SystemRuntime *system_runtime = GetSystemRuntime (); 3677 if (system_runtime) 3678 { 3679 system_runtime->DidAttach(); 3680 if (log) 3681 { 3682 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3683 log->Printf ("Process::%s after SystemRuntime::DidAttach(), target executable is %s (using %s plugin)", 3684 __FUNCTION__, 3685 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>", 3686 system_runtime->GetPluginName().AsCString("<unnamed>")); 3687 } 3688 } 3689 3690 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3691 // Figure out which one is the executable, and set that in our target: 3692 const ModuleList &target_modules = GetTarget().GetImages(); 3693 Mutex::Locker modules_locker(target_modules.GetMutex()); 3694 size_t num_modules = target_modules.GetSize(); 3695 ModuleSP new_executable_module_sp; 3696 3697 for (size_t i = 0; i < num_modules; i++) 3698 { 3699 ModuleSP module_sp (target_modules.GetModuleAtIndexUnlocked (i)); 3700 if (module_sp && module_sp->IsExecutable()) 3701 { 3702 if (GetTarget().GetExecutableModulePointer() != module_sp.get()) 3703 new_executable_module_sp = module_sp; 3704 break; 3705 } 3706 } 3707 if (new_executable_module_sp) 3708 { 3709 GetTarget().SetExecutableModule (new_executable_module_sp, false); 3710 if (log) 3711 { 3712 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3713 log->Printf ("Process::%s after looping through modules, target executable is %s", 3714 __FUNCTION__, 3715 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>"); 3716 } 3717 } 3718 3719 m_stop_info_override_callback = process_arch.GetStopInfoOverrideCallback(); 3720 } 3721 3722 Error 3723 Process::ConnectRemote (Stream *strm, const char *remote_url) 3724 { 3725 m_abi_sp.reset(); 3726 m_process_input_reader.reset(); 3727 3728 // Find the process and its architecture. Make sure it matches the architecture 3729 // of the current Target, and if not adjust it. 3730 3731 Error error (DoConnectRemote (strm, remote_url)); 3732 if (error.Success()) 3733 { 3734 if (GetID() != LLDB_INVALID_PROCESS_ID) 3735 { 3736 EventSP event_sp; 3737 StateType state = WaitForProcessStopPrivate(NULL, event_sp); 3738 3739 if (state == eStateStopped || state == eStateCrashed) 3740 { 3741 // If we attached and actually have a process on the other end, then 3742 // this ended up being the equivalent of an attach. 3743 CompleteAttach (); 3744 3745 // This delays passing the stopped event to listeners till 3746 // CompleteAttach gets a chance to complete... 3747 HandlePrivateEvent (event_sp); 3748 3749 } 3750 } 3751 3752 if (PrivateStateThreadIsValid ()) 3753 ResumePrivateStateThread (); 3754 else 3755 StartPrivateStateThread (); 3756 } 3757 return error; 3758 } 3759 3760 3761 Error 3762 Process::PrivateResume () 3763 { 3764 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_STEP)); 3765 if (log) 3766 log->Printf("Process::PrivateResume() m_stop_id = %u, public state: %s private state: %s", 3767 m_mod_id.GetStopID(), 3768 StateAsCString(m_public_state.GetValue()), 3769 StateAsCString(m_private_state.GetValue())); 3770 3771 Error error (WillResume()); 3772 // Tell the process it is about to resume before the thread list 3773 if (error.Success()) 3774 { 3775 // Now let the thread list know we are about to resume so it 3776 // can let all of our threads know that they are about to be 3777 // resumed. Threads will each be called with 3778 // Thread::WillResume(StateType) where StateType contains the state 3779 // that they are supposed to have when the process is resumed 3780 // (suspended/running/stepping). Threads should also check 3781 // their resume signal in lldb::Thread::GetResumeSignal() 3782 // to see if they are supposed to start back up with a signal. 3783 if (m_thread_list.WillResume()) 3784 { 3785 // Last thing, do the PreResumeActions. 3786 if (!RunPreResumeActions()) 3787 { 3788 error.SetErrorStringWithFormat ("Process::PrivateResume PreResumeActions failed, not resuming."); 3789 } 3790 else 3791 { 3792 m_mod_id.BumpResumeID(); 3793 error = DoResume(); 3794 if (error.Success()) 3795 { 3796 DidResume(); 3797 m_thread_list.DidResume(); 3798 if (log) 3799 log->Printf ("Process thinks the process has resumed."); 3800 } 3801 } 3802 } 3803 else 3804 { 3805 // Somebody wanted to run without running (e.g. we were faking a step from one frame of a set of inlined 3806 // frames that share the same PC to another.) So generate a continue & a stopped event, 3807 // and let the world handle them. 3808 if (log) 3809 log->Printf ("Process::PrivateResume() asked to simulate a start & stop."); 3810 3811 SetPrivateState(eStateRunning); 3812 SetPrivateState(eStateStopped); 3813 } 3814 } 3815 else if (log) 3816 log->Printf ("Process::PrivateResume() got an error \"%s\".", error.AsCString("<unknown error>")); 3817 return error; 3818 } 3819 3820 Error 3821 Process::Halt (bool clear_thread_plans) 3822 { 3823 // Don't clear the m_clear_thread_plans_on_stop, only set it to true if 3824 // in case it was already set and some thread plan logic calls halt on its 3825 // own. 3826 m_clear_thread_plans_on_stop |= clear_thread_plans; 3827 3828 // First make sure we aren't in the middle of handling an event, or we might restart. This is pretty weak, since 3829 // we could just straightaway get another event. It just narrows the window... 3830 m_currently_handling_event.WaitForValueEqualTo(false); 3831 3832 3833 // Pause our private state thread so we can ensure no one else eats 3834 // the stop event out from under us. 3835 Listener halt_listener ("lldb.process.halt_listener"); 3836 HijackPrivateProcessEvents(&halt_listener); 3837 3838 EventSP event_sp; 3839 Error error (WillHalt()); 3840 3841 bool restored_process_events = false; 3842 if (error.Success()) 3843 { 3844 3845 bool caused_stop = false; 3846 3847 // Ask the process subclass to actually halt our process 3848 error = DoHalt(caused_stop); 3849 if (error.Success()) 3850 { 3851 if (m_public_state.GetValue() == eStateAttaching) 3852 { 3853 // Don't hijack and eat the eStateExited as the code that was doing 3854 // the attach will be waiting for this event... 3855 RestorePrivateProcessEvents(); 3856 restored_process_events = true; 3857 SetExitStatus(SIGKILL, "Cancelled async attach."); 3858 Destroy (false); 3859 } 3860 else 3861 { 3862 // If "caused_stop" is true, then DoHalt stopped the process. If 3863 // "caused_stop" is false, the process was already stopped. 3864 // If the DoHalt caused the process to stop, then we want to catch 3865 // this event and set the interrupted bool to true before we pass 3866 // this along so clients know that the process was interrupted by 3867 // a halt command. 3868 if (caused_stop) 3869 { 3870 // Wait for 1 second for the process to stop. 3871 TimeValue timeout_time; 3872 timeout_time = TimeValue::Now(); 3873 timeout_time.OffsetWithSeconds(10); 3874 bool got_event = halt_listener.WaitForEvent (&timeout_time, event_sp); 3875 StateType state = ProcessEventData::GetStateFromEvent(event_sp.get()); 3876 3877 if (!got_event || state == eStateInvalid) 3878 { 3879 // We timeout out and didn't get a stop event... 3880 error.SetErrorStringWithFormat ("Halt timed out. State = %s", StateAsCString(GetState())); 3881 } 3882 else 3883 { 3884 if (StateIsStoppedState (state, false)) 3885 { 3886 // We caused the process to interrupt itself, so mark this 3887 // as such in the stop event so clients can tell an interrupted 3888 // process from a natural stop 3889 ProcessEventData::SetInterruptedInEvent (event_sp.get(), true); 3890 } 3891 else 3892 { 3893 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3894 if (log) 3895 log->Printf("Process::Halt() failed to stop, state is: %s", StateAsCString(state)); 3896 error.SetErrorString ("Did not get stopped event after halt."); 3897 } 3898 } 3899 } 3900 DidHalt(); 3901 } 3902 } 3903 } 3904 // Resume our private state thread before we post the event (if any) 3905 if (!restored_process_events) 3906 RestorePrivateProcessEvents(); 3907 3908 // Post any event we might have consumed. If all goes well, we will have 3909 // stopped the process, intercepted the event and set the interrupted 3910 // bool in the event. Post it to the private event queue and that will end up 3911 // correctly setting the state. 3912 if (event_sp) 3913 m_private_state_broadcaster.BroadcastEvent(event_sp); 3914 3915 return error; 3916 } 3917 3918 Error 3919 Process::HaltForDestroyOrDetach(lldb::EventSP &exit_event_sp) 3920 { 3921 Error error; 3922 if (m_public_state.GetValue() == eStateRunning) 3923 { 3924 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3925 if (log) 3926 log->Printf("Process::%s() About to halt.", __FUNCTION__); 3927 error = Halt(); 3928 if (error.Success()) 3929 { 3930 // Consume the halt event. 3931 TimeValue timeout (TimeValue::Now()); 3932 timeout.OffsetWithSeconds(1); 3933 StateType state = WaitForProcessToStop (&timeout, &exit_event_sp); 3934 3935 // If the process exited while we were waiting for it to stop, put the exited event into 3936 // the shared pointer passed in and return. Our caller doesn't need to do anything else, since 3937 // they don't have a process anymore... 3938 3939 if (state == eStateExited || m_private_state.GetValue() == eStateExited) 3940 { 3941 if (log) 3942 log->Printf("Process::HaltForDestroyOrDetach() Process exited while waiting to Halt."); 3943 return error; 3944 } 3945 else 3946 exit_event_sp.reset(); // It is ok to consume any non-exit stop events 3947 3948 if (state != eStateStopped) 3949 { 3950 if (log) 3951 log->Printf("Process::HaltForDestroyOrDetach() Halt failed to stop, state is: %s", StateAsCString(state)); 3952 // If we really couldn't stop the process then we should just error out here, but if the 3953 // lower levels just bobbled sending the event and we really are stopped, then continue on. 3954 StateType private_state = m_private_state.GetValue(); 3955 if (private_state != eStateStopped) 3956 { 3957 return error; 3958 } 3959 } 3960 } 3961 else 3962 { 3963 if (log) 3964 log->Printf("Process::HaltForDestroyOrDetach() Halt got error: %s", error.AsCString()); 3965 } 3966 } 3967 return error; 3968 } 3969 3970 Error 3971 Process::Detach (bool keep_stopped) 3972 { 3973 EventSP exit_event_sp; 3974 Error error; 3975 m_destroy_in_process = true; 3976 3977 error = WillDetach(); 3978 3979 if (error.Success()) 3980 { 3981 if (DetachRequiresHalt()) 3982 { 3983 error = HaltForDestroyOrDetach (exit_event_sp); 3984 if (!error.Success()) 3985 { 3986 m_destroy_in_process = false; 3987 return error; 3988 } 3989 else if (exit_event_sp) 3990 { 3991 // We shouldn't need to do anything else here. There's no process left to detach from... 3992 StopPrivateStateThread(); 3993 m_destroy_in_process = false; 3994 return error; 3995 } 3996 } 3997 3998 m_thread_list.DiscardThreadPlans(); 3999 DisableAllBreakpointSites(); 4000 4001 error = DoDetach(keep_stopped); 4002 if (error.Success()) 4003 { 4004 DidDetach(); 4005 StopPrivateStateThread(); 4006 } 4007 else 4008 { 4009 return error; 4010 } 4011 } 4012 m_destroy_in_process = false; 4013 4014 // If we exited when we were waiting for a process to stop, then 4015 // forward the event here so we don't lose the event 4016 if (exit_event_sp) 4017 { 4018 // Directly broadcast our exited event because we shut down our 4019 // private state thread above 4020 BroadcastEvent(exit_event_sp); 4021 } 4022 4023 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 4024 // the last events through the event system, in which case we might strand the write lock. Unlock 4025 // it here so when we do to tear down the process we don't get an error destroying the lock. 4026 4027 m_public_run_lock.SetStopped(); 4028 return error; 4029 } 4030 4031 Error 4032 Process::Destroy (bool force_kill) 4033 { 4034 4035 // Tell ourselves we are in the process of destroying the process, so that we don't do any unnecessary work 4036 // that might hinder the destruction. Remember to set this back to false when we are done. That way if the attempt 4037 // failed and the process stays around for some reason it won't be in a confused state. 4038 4039 if (force_kill) 4040 m_should_detach = false; 4041 4042 if (GetShouldDetach()) 4043 { 4044 // FIXME: This will have to be a process setting: 4045 bool keep_stopped = false; 4046 Detach(keep_stopped); 4047 } 4048 4049 m_destroy_in_process = true; 4050 4051 Error error (WillDestroy()); 4052 if (error.Success()) 4053 { 4054 EventSP exit_event_sp; 4055 if (DestroyRequiresHalt()) 4056 { 4057 error = HaltForDestroyOrDetach(exit_event_sp); 4058 } 4059 4060 if (m_public_state.GetValue() != eStateRunning) 4061 { 4062 // Ditch all thread plans, and remove all our breakpoints: in case we have to restart the target to 4063 // kill it, we don't want it hitting a breakpoint... 4064 // Only do this if we've stopped, however, since if we didn't manage to halt it above, then 4065 // we're not going to have much luck doing this now. 4066 m_thread_list.DiscardThreadPlans(); 4067 DisableAllBreakpointSites(); 4068 } 4069 4070 error = DoDestroy(); 4071 if (error.Success()) 4072 { 4073 DidDestroy(); 4074 StopPrivateStateThread(); 4075 } 4076 m_stdio_communication.Disconnect(); 4077 m_stdio_communication.StopReadThread(); 4078 m_stdin_forward = false; 4079 4080 if (m_process_input_reader) 4081 { 4082 m_process_input_reader->SetIsDone(true); 4083 m_process_input_reader->Cancel(); 4084 m_process_input_reader.reset(); 4085 } 4086 4087 // If we exited when we were waiting for a process to stop, then 4088 // forward the event here so we don't lose the event 4089 if (exit_event_sp) 4090 { 4091 // Directly broadcast our exited event because we shut down our 4092 // private state thread above 4093 BroadcastEvent(exit_event_sp); 4094 } 4095 4096 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 4097 // the last events through the event system, in which case we might strand the write lock. Unlock 4098 // it here so when we do to tear down the process we don't get an error destroying the lock. 4099 m_public_run_lock.SetStopped(); 4100 } 4101 4102 m_destroy_in_process = false; 4103 4104 return error; 4105 } 4106 4107 Error 4108 Process::Signal (int signal) 4109 { 4110 Error error (WillSignal()); 4111 if (error.Success()) 4112 { 4113 error = DoSignal(signal); 4114 if (error.Success()) 4115 DidSignal(); 4116 } 4117 return error; 4118 } 4119 4120 void 4121 Process::SetUnixSignals(UnixSignalsSP &&signals_sp) 4122 { 4123 assert (signals_sp && "null signals_sp"); 4124 m_unix_signals_sp = signals_sp; 4125 } 4126 4127 const lldb::UnixSignalsSP & 4128 Process::GetUnixSignals () 4129 { 4130 assert (m_unix_signals_sp && "null m_unix_signals_sp"); 4131 return m_unix_signals_sp; 4132 } 4133 4134 lldb::ByteOrder 4135 Process::GetByteOrder () const 4136 { 4137 return GetTarget().GetArchitecture().GetByteOrder(); 4138 } 4139 4140 uint32_t 4141 Process::GetAddressByteSize () const 4142 { 4143 return GetTarget().GetArchitecture().GetAddressByteSize(); 4144 } 4145 4146 4147 bool 4148 Process::ShouldBroadcastEvent (Event *event_ptr) 4149 { 4150 const StateType state = Process::ProcessEventData::GetStateFromEvent (event_ptr); 4151 bool return_value = true; 4152 Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_EVENTS | LIBLLDB_LOG_PROCESS)); 4153 4154 switch (state) 4155 { 4156 case eStateDetached: 4157 case eStateExited: 4158 case eStateUnloaded: 4159 m_stdio_communication.SynchronizeWithReadThread(); 4160 m_stdio_communication.Disconnect(); 4161 m_stdio_communication.StopReadThread(); 4162 m_stdin_forward = false; 4163 4164 // fall-through 4165 case eStateConnected: 4166 case eStateAttaching: 4167 case eStateLaunching: 4168 // These events indicate changes in the state of the debugging session, always report them. 4169 return_value = true; 4170 break; 4171 case eStateInvalid: 4172 // We stopped for no apparent reason, don't report it. 4173 return_value = false; 4174 break; 4175 case eStateRunning: 4176 case eStateStepping: 4177 // If we've started the target running, we handle the cases where we 4178 // are already running and where there is a transition from stopped to 4179 // running differently. 4180 // running -> running: Automatically suppress extra running events 4181 // stopped -> running: Report except when there is one or more no votes 4182 // and no yes votes. 4183 SynchronouslyNotifyStateChanged (state); 4184 if (m_force_next_event_delivery) 4185 return_value = true; 4186 else 4187 { 4188 switch (m_last_broadcast_state) 4189 { 4190 case eStateRunning: 4191 case eStateStepping: 4192 // We always suppress multiple runnings with no PUBLIC stop in between. 4193 return_value = false; 4194 break; 4195 default: 4196 // TODO: make this work correctly. For now always report 4197 // run if we aren't running so we don't miss any running 4198 // events. If I run the lldb/test/thread/a.out file and 4199 // break at main.cpp:58, run and hit the breakpoints on 4200 // multiple threads, then somehow during the stepping over 4201 // of all breakpoints no run gets reported. 4202 4203 // This is a transition from stop to run. 4204 switch (m_thread_list.ShouldReportRun (event_ptr)) 4205 { 4206 case eVoteYes: 4207 case eVoteNoOpinion: 4208 return_value = true; 4209 break; 4210 case eVoteNo: 4211 return_value = false; 4212 break; 4213 } 4214 break; 4215 } 4216 } 4217 break; 4218 case eStateStopped: 4219 case eStateCrashed: 4220 case eStateSuspended: 4221 { 4222 // We've stopped. First see if we're going to restart the target. 4223 // If we are going to stop, then we always broadcast the event. 4224 // If we aren't going to stop, let the thread plans decide if we're going to report this event. 4225 // If no thread has an opinion, we don't report it. 4226 4227 m_stdio_communication.SynchronizeWithReadThread(); 4228 RefreshStateAfterStop (); 4229 if (ProcessEventData::GetInterruptedFromEvent (event_ptr)) 4230 { 4231 if (log) 4232 log->Printf ("Process::ShouldBroadcastEvent (%p) stopped due to an interrupt, state: %s", 4233 static_cast<void*>(event_ptr), 4234 StateAsCString(state)); 4235 // Even though we know we are going to stop, we should let the threads have a look at the stop, 4236 // so they can properly set their state. 4237 m_thread_list.ShouldStop (event_ptr); 4238 return_value = true; 4239 } 4240 else 4241 { 4242 bool was_restarted = ProcessEventData::GetRestartedFromEvent (event_ptr); 4243 bool should_resume = false; 4244 4245 // It makes no sense to ask "ShouldStop" if we've already been restarted... 4246 // Asking the thread list is also not likely to go well, since we are running again. 4247 // So in that case just report the event. 4248 4249 if (!was_restarted) 4250 should_resume = m_thread_list.ShouldStop (event_ptr) == false; 4251 4252 if (was_restarted || should_resume || m_resume_requested) 4253 { 4254 Vote stop_vote = m_thread_list.ShouldReportStop (event_ptr); 4255 if (log) 4256 log->Printf ("Process::ShouldBroadcastEvent: should_stop: %i state: %s was_restarted: %i stop_vote: %d.", 4257 should_resume, StateAsCString(state), 4258 was_restarted, stop_vote); 4259 4260 switch (stop_vote) 4261 { 4262 case eVoteYes: 4263 return_value = true; 4264 break; 4265 case eVoteNoOpinion: 4266 case eVoteNo: 4267 return_value = false; 4268 break; 4269 } 4270 4271 if (!was_restarted) 4272 { 4273 if (log) 4274 log->Printf ("Process::ShouldBroadcastEvent (%p) Restarting process from state: %s", 4275 static_cast<void*>(event_ptr), 4276 StateAsCString(state)); 4277 ProcessEventData::SetRestartedInEvent(event_ptr, true); 4278 PrivateResume (); 4279 } 4280 4281 } 4282 else 4283 { 4284 return_value = true; 4285 SynchronouslyNotifyStateChanged (state); 4286 } 4287 } 4288 } 4289 break; 4290 } 4291 4292 // Forcing the next event delivery is a one shot deal. So reset it here. 4293 m_force_next_event_delivery = false; 4294 4295 // We do some coalescing of events (for instance two consecutive running events get coalesced.) 4296 // But we only coalesce against events we actually broadcast. So we use m_last_broadcast_state 4297 // to track that. NB - you can't use "m_public_state.GetValue()" for that purpose, as was originally done, 4298 // because the PublicState reflects the last event pulled off the queue, and there may be several 4299 // events stacked up on the queue unserviced. So the PublicState may not reflect the last broadcasted event 4300 // yet. m_last_broadcast_state gets updated here. 4301 4302 if (return_value) 4303 m_last_broadcast_state = state; 4304 4305 if (log) 4306 log->Printf ("Process::ShouldBroadcastEvent (%p) => new state: %s, last broadcast state: %s - %s", 4307 static_cast<void*>(event_ptr), StateAsCString(state), 4308 StateAsCString(m_last_broadcast_state), 4309 return_value ? "YES" : "NO"); 4310 return return_value; 4311 } 4312 4313 4314 bool 4315 Process::StartPrivateStateThread (bool is_secondary_thread) 4316 { 4317 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EVENTS)); 4318 4319 bool already_running = PrivateStateThreadIsValid (); 4320 if (log) 4321 log->Printf ("Process::%s()%s ", __FUNCTION__, already_running ? " already running" : " starting private state thread"); 4322 4323 if (!is_secondary_thread && already_running) 4324 return true; 4325 4326 // Create a thread that watches our internal state and controls which 4327 // events make it to clients (into the DCProcess event queue). 4328 char thread_name[1024]; 4329 4330 if (HostInfo::GetMaxThreadNameLength() <= 30) 4331 { 4332 // On platforms with abbreviated thread name lengths, choose thread names that fit within the limit. 4333 if (already_running) 4334 snprintf(thread_name, sizeof(thread_name), "intern-state-OV"); 4335 else 4336 snprintf(thread_name, sizeof(thread_name), "intern-state"); 4337 } 4338 else 4339 { 4340 if (already_running) 4341 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state-override(pid=%" PRIu64 ")>", GetID()); 4342 else 4343 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state(pid=%" PRIu64 ")>", GetID()); 4344 } 4345 4346 // Create the private state thread, and start it running. 4347 PrivateStateThreadArgs args = {this, is_secondary_thread}; 4348 m_private_state_thread = ThreadLauncher::LaunchThread(thread_name, Process::PrivateStateThread, (void *) &args, NULL); 4349 if (m_private_state_thread.IsJoinable()) 4350 { 4351 ResumePrivateStateThread(); 4352 return true; 4353 } 4354 else 4355 return false; 4356 } 4357 4358 void 4359 Process::PausePrivateStateThread () 4360 { 4361 ControlPrivateStateThread (eBroadcastInternalStateControlPause); 4362 } 4363 4364 void 4365 Process::ResumePrivateStateThread () 4366 { 4367 ControlPrivateStateThread (eBroadcastInternalStateControlResume); 4368 } 4369 4370 void 4371 Process::StopPrivateStateThread () 4372 { 4373 if (PrivateStateThreadIsValid ()) 4374 ControlPrivateStateThread (eBroadcastInternalStateControlStop); 4375 else 4376 { 4377 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4378 if (log) 4379 log->Printf ("Went to stop the private state thread, but it was already invalid."); 4380 } 4381 } 4382 4383 void 4384 Process::ControlPrivateStateThread (uint32_t signal) 4385 { 4386 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4387 4388 assert (signal == eBroadcastInternalStateControlStop || 4389 signal == eBroadcastInternalStateControlPause || 4390 signal == eBroadcastInternalStateControlResume); 4391 4392 if (log) 4393 log->Printf ("Process::%s (signal = %d)", __FUNCTION__, signal); 4394 4395 // Signal the private state thread. First we should copy this is case the 4396 // thread starts exiting since the private state thread will NULL this out 4397 // when it exits 4398 HostThread private_state_thread(m_private_state_thread); 4399 if (private_state_thread.IsJoinable()) 4400 { 4401 TimeValue timeout_time; 4402 bool timed_out; 4403 4404 m_private_state_control_broadcaster.BroadcastEvent (signal, NULL); 4405 4406 timeout_time = TimeValue::Now(); 4407 timeout_time.OffsetWithSeconds(2); 4408 if (log) 4409 log->Printf ("Sending control event of type: %d.", signal); 4410 m_private_state_control_wait.WaitForValueEqualTo (true, &timeout_time, &timed_out); 4411 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4412 4413 if (signal == eBroadcastInternalStateControlStop) 4414 { 4415 if (timed_out) 4416 { 4417 Error error = private_state_thread.Cancel(); 4418 if (log) 4419 log->Printf ("Timed out responding to the control event, cancel got error: \"%s\".", error.AsCString()); 4420 } 4421 else 4422 { 4423 if (log) 4424 log->Printf ("The control event killed the private state thread without having to cancel."); 4425 } 4426 4427 thread_result_t result = NULL; 4428 private_state_thread.Join(&result); 4429 m_private_state_thread.Reset(); 4430 } 4431 } 4432 else 4433 { 4434 if (log) 4435 log->Printf ("Private state thread already dead, no need to signal it to stop."); 4436 } 4437 } 4438 4439 void 4440 Process::SendAsyncInterrupt () 4441 { 4442 if (PrivateStateThreadIsValid()) 4443 m_private_state_broadcaster.BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4444 else 4445 BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4446 } 4447 4448 void 4449 Process::HandlePrivateEvent (EventSP &event_sp) 4450 { 4451 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4452 m_resume_requested = false; 4453 4454 m_currently_handling_event.SetValue(true, eBroadcastNever); 4455 4456 const StateType new_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4457 4458 // First check to see if anybody wants a shot at this event: 4459 if (m_next_event_action_ap.get() != NULL) 4460 { 4461 NextEventAction::EventActionResult action_result = m_next_event_action_ap->PerformAction(event_sp); 4462 if (log) 4463 log->Printf ("Ran next event action, result was %d.", action_result); 4464 4465 switch (action_result) 4466 { 4467 case NextEventAction::eEventActionSuccess: 4468 SetNextEventAction(NULL); 4469 break; 4470 4471 case NextEventAction::eEventActionRetry: 4472 break; 4473 4474 case NextEventAction::eEventActionExit: 4475 // Handle Exiting Here. If we already got an exited event, 4476 // we should just propagate it. Otherwise, swallow this event, 4477 // and set our state to exit so the next event will kill us. 4478 if (new_state != eStateExited) 4479 { 4480 // FIXME: should cons up an exited event, and discard this one. 4481 SetExitStatus(0, m_next_event_action_ap->GetExitString()); 4482 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4483 SetNextEventAction(NULL); 4484 return; 4485 } 4486 SetNextEventAction(NULL); 4487 break; 4488 } 4489 } 4490 4491 // See if we should broadcast this state to external clients? 4492 const bool should_broadcast = ShouldBroadcastEvent (event_sp.get()); 4493 4494 if (should_broadcast) 4495 { 4496 const bool is_hijacked = IsHijackedForEvent(eBroadcastBitStateChanged); 4497 if (log) 4498 { 4499 log->Printf ("Process::%s (pid = %" PRIu64 ") broadcasting new state %s (old state %s) to %s", 4500 __FUNCTION__, 4501 GetID(), 4502 StateAsCString(new_state), 4503 StateAsCString (GetState ()), 4504 is_hijacked ? "hijacked" : "public"); 4505 } 4506 Process::ProcessEventData::SetUpdateStateOnRemoval(event_sp.get()); 4507 if (StateIsRunningState (new_state)) 4508 { 4509 // Only push the input handler if we aren't fowarding events, 4510 // as this means the curses GUI is in use... 4511 // Or don't push it if we are launching since it will come up stopped. 4512 if (!GetTarget().GetDebugger().IsForwardingEvents() && new_state != eStateLaunching && 4513 new_state != eStateAttaching) 4514 { 4515 PushProcessIOHandler (); 4516 m_iohandler_sync.SetValue(m_iohandler_sync.GetValue()+1, eBroadcastAlways); 4517 if (log) 4518 log->Printf("Process::%s updated m_iohandler_sync to %d", __FUNCTION__, m_iohandler_sync.GetValue()); 4519 } 4520 } 4521 else if (StateIsStoppedState(new_state, false)) 4522 { 4523 if (!Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 4524 { 4525 // If the lldb_private::Debugger is handling the events, we don't 4526 // want to pop the process IOHandler here, we want to do it when 4527 // we receive the stopped event so we can carefully control when 4528 // the process IOHandler is popped because when we stop we want to 4529 // display some text stating how and why we stopped, then maybe some 4530 // process/thread/frame info, and then we want the "(lldb) " prompt 4531 // to show up. If we pop the process IOHandler here, then we will 4532 // cause the command interpreter to become the top IOHandler after 4533 // the process pops off and it will update its prompt right away... 4534 // See the Debugger.cpp file where it calls the function as 4535 // "process_sp->PopProcessIOHandler()" to see where I am talking about. 4536 // Otherwise we end up getting overlapping "(lldb) " prompts and 4537 // garbled output. 4538 // 4539 // If we aren't handling the events in the debugger (which is indicated 4540 // by "m_target.GetDebugger().IsHandlingEvents()" returning false) or we 4541 // are hijacked, then we always pop the process IO handler manually. 4542 // Hijacking happens when the internal process state thread is running 4543 // thread plans, or when commands want to run in synchronous mode 4544 // and they call "process->WaitForProcessToStop()". An example of something 4545 // that will hijack the events is a simple expression: 4546 // 4547 // (lldb) expr (int)puts("hello") 4548 // 4549 // This will cause the internal process state thread to resume and halt 4550 // the process (and _it_ will hijack the eBroadcastBitStateChanged 4551 // events) and we do need the IO handler to be pushed and popped 4552 // correctly. 4553 4554 if (is_hijacked || GetTarget().GetDebugger().IsHandlingEvents() == false) 4555 PopProcessIOHandler (); 4556 } 4557 } 4558 4559 BroadcastEvent (event_sp); 4560 } 4561 else 4562 { 4563 if (log) 4564 { 4565 log->Printf ("Process::%s (pid = %" PRIu64 ") suppressing state %s (old state %s): should_broadcast == false", 4566 __FUNCTION__, 4567 GetID(), 4568 StateAsCString(new_state), 4569 StateAsCString (GetState ())); 4570 } 4571 } 4572 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4573 } 4574 4575 thread_result_t 4576 Process::PrivateStateThread (void *arg) 4577 { 4578 PrivateStateThreadArgs *real_args = static_cast<PrivateStateThreadArgs *> (arg); 4579 thread_result_t result = real_args->process->RunPrivateStateThread(real_args->is_secondary_thread); 4580 return result; 4581 } 4582 4583 thread_result_t 4584 Process::RunPrivateStateThread (bool is_secondary_thread) 4585 { 4586 bool control_only = true; 4587 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4588 4589 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4590 if (log) 4591 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread starting...", 4592 __FUNCTION__, static_cast<void*>(this), GetID()); 4593 4594 bool exit_now = false; 4595 while (!exit_now) 4596 { 4597 EventSP event_sp; 4598 WaitForEventsPrivate (NULL, event_sp, control_only); 4599 if (event_sp->BroadcasterIs(&m_private_state_control_broadcaster)) 4600 { 4601 if (log) 4602 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") got a control event: %d", 4603 __FUNCTION__, static_cast<void*>(this), GetID(), 4604 event_sp->GetType()); 4605 4606 switch (event_sp->GetType()) 4607 { 4608 case eBroadcastInternalStateControlStop: 4609 exit_now = true; 4610 break; // doing any internal state management below 4611 4612 case eBroadcastInternalStateControlPause: 4613 control_only = true; 4614 break; 4615 4616 case eBroadcastInternalStateControlResume: 4617 control_only = false; 4618 break; 4619 } 4620 4621 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4622 continue; 4623 } 4624 else if (event_sp->GetType() == eBroadcastBitInterrupt) 4625 { 4626 if (m_public_state.GetValue() == eStateAttaching) 4627 { 4628 if (log) 4629 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt while attaching - forwarding interrupt.", 4630 __FUNCTION__, static_cast<void*>(this), 4631 GetID()); 4632 BroadcastEvent (eBroadcastBitInterrupt, NULL); 4633 } 4634 else 4635 { 4636 if (log) 4637 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt - Halting.", 4638 __FUNCTION__, static_cast<void*>(this), 4639 GetID()); 4640 Halt(); 4641 } 4642 continue; 4643 } 4644 4645 const StateType internal_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4646 4647 if (internal_state != eStateInvalid) 4648 { 4649 if (m_clear_thread_plans_on_stop && 4650 StateIsStoppedState(internal_state, true)) 4651 { 4652 m_clear_thread_plans_on_stop = false; 4653 m_thread_list.DiscardThreadPlans(); 4654 } 4655 HandlePrivateEvent (event_sp); 4656 } 4657 4658 if (internal_state == eStateInvalid || 4659 internal_state == eStateExited || 4660 internal_state == eStateDetached ) 4661 { 4662 if (log) 4663 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") about to exit with internal state %s...", 4664 __FUNCTION__, static_cast<void*>(this), GetID(), 4665 StateAsCString(internal_state)); 4666 4667 break; 4668 } 4669 } 4670 4671 // Verify log is still enabled before attempting to write to it... 4672 if (log) 4673 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", 4674 __FUNCTION__, static_cast<void*>(this), GetID()); 4675 4676 // If we are a secondary thread, then the primary thread we are working for will have already 4677 // acquired the public_run_lock, and isn't done with what it was doing yet, so don't 4678 // try to change it on the way out. 4679 if (!is_secondary_thread) 4680 m_public_run_lock.SetStopped(); 4681 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4682 m_private_state_thread.Reset(); 4683 return NULL; 4684 } 4685 4686 //------------------------------------------------------------------ 4687 // Process Event Data 4688 //------------------------------------------------------------------ 4689 4690 Process::ProcessEventData::ProcessEventData () : 4691 EventData (), 4692 m_process_wp (), 4693 m_state (eStateInvalid), 4694 m_restarted (false), 4695 m_update_state (0), 4696 m_interrupted (false) 4697 { 4698 } 4699 4700 Process::ProcessEventData::ProcessEventData (const ProcessSP &process_sp, StateType state) : 4701 EventData (), 4702 m_process_wp (), 4703 m_state (state), 4704 m_restarted (false), 4705 m_update_state (0), 4706 m_interrupted (false) 4707 { 4708 if (process_sp) 4709 m_process_wp = process_sp; 4710 } 4711 4712 Process::ProcessEventData::~ProcessEventData() 4713 { 4714 } 4715 4716 const ConstString & 4717 Process::ProcessEventData::GetFlavorString () 4718 { 4719 static ConstString g_flavor ("Process::ProcessEventData"); 4720 return g_flavor; 4721 } 4722 4723 const ConstString & 4724 Process::ProcessEventData::GetFlavor () const 4725 { 4726 return ProcessEventData::GetFlavorString (); 4727 } 4728 4729 void 4730 Process::ProcessEventData::DoOnRemoval (Event *event_ptr) 4731 { 4732 ProcessSP process_sp(m_process_wp.lock()); 4733 4734 if (!process_sp) 4735 return; 4736 4737 // This function gets called twice for each event, once when the event gets pulled 4738 // off of the private process event queue, and then any number of times, first when it gets pulled off of 4739 // the public event queue, then other times when we're pretending that this is where we stopped at the 4740 // end of expression evaluation. m_update_state is used to distinguish these 4741 // three cases; it is 0 when we're just pulling it off for private handling, 4742 // and > 1 for expression evaluation, and we don't want to do the breakpoint command handling then. 4743 if (m_update_state != 1) 4744 return; 4745 4746 process_sp->SetPublicState (m_state, Process::ProcessEventData::GetRestartedFromEvent(event_ptr)); 4747 4748 // If this is a halt event, even if the halt stopped with some reason other than a plain interrupt (e.g. we had 4749 // already stopped for a breakpoint when the halt request came through) don't do the StopInfo actions, as they may 4750 // end up restarting the process. 4751 if (m_interrupted) 4752 return; 4753 4754 // If we're stopped and haven't restarted, then do the StopInfo actions here: 4755 if (m_state == eStateStopped && ! m_restarted) 4756 { 4757 // Let process subclasses know we are about to do a public stop and 4758 // do anything they might need to in order to speed up register and 4759 // memory accesses. 4760 process_sp->WillPublicStop(); 4761 4762 ThreadList &curr_thread_list = process_sp->GetThreadList(); 4763 uint32_t num_threads = curr_thread_list.GetSize(); 4764 uint32_t idx; 4765 4766 // The actions might change one of the thread's stop_info's opinions about whether we should 4767 // stop the process, so we need to query that as we go. 4768 4769 // One other complication here, is that we try to catch any case where the target has run (except for expressions) 4770 // and immediately exit, but if we get that wrong (which is possible) then the thread list might have changed, and 4771 // that would cause our iteration here to crash. We could make a copy of the thread list, but we'd really like 4772 // 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 4773 // against this list & bag out if anything differs. 4774 std::vector<uint32_t> thread_index_array(num_threads); 4775 for (idx = 0; idx < num_threads; ++idx) 4776 thread_index_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetIndexID(); 4777 4778 // Use this to track whether we should continue from here. We will only continue the target running if 4779 // no thread says we should stop. Of course if some thread's PerformAction actually sets the target running, 4780 // then it doesn't matter what the other threads say... 4781 4782 bool still_should_stop = false; 4783 4784 // Sometimes - for instance if we have a bug in the stub we are talking to, we stop but no thread has a 4785 // valid stop reason. In that case we should just stop, because we have no way of telling what the right 4786 // thing to do is, and it's better to let the user decide than continue behind their backs. 4787 4788 bool does_anybody_have_an_opinion = false; 4789 4790 for (idx = 0; idx < num_threads; ++idx) 4791 { 4792 curr_thread_list = process_sp->GetThreadList(); 4793 if (curr_thread_list.GetSize() != num_threads) 4794 { 4795 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4796 if (log) 4797 log->Printf("Number of threads changed from %u to %u while processing event.", num_threads, curr_thread_list.GetSize()); 4798 break; 4799 } 4800 4801 lldb::ThreadSP thread_sp = curr_thread_list.GetThreadAtIndex(idx); 4802 4803 if (thread_sp->GetIndexID() != thread_index_array[idx]) 4804 { 4805 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4806 if (log) 4807 log->Printf("The thread at position %u changed from %u to %u while processing event.", 4808 idx, 4809 thread_index_array[idx], 4810 thread_sp->GetIndexID()); 4811 break; 4812 } 4813 4814 StopInfoSP stop_info_sp = thread_sp->GetStopInfo (); 4815 if (stop_info_sp && stop_info_sp->IsValid()) 4816 { 4817 does_anybody_have_an_opinion = true; 4818 bool this_thread_wants_to_stop; 4819 if (stop_info_sp->GetOverrideShouldStop()) 4820 { 4821 this_thread_wants_to_stop = stop_info_sp->GetOverriddenShouldStopValue(); 4822 } 4823 else 4824 { 4825 stop_info_sp->PerformAction(event_ptr); 4826 // The stop action might restart the target. If it does, then we want to mark that in the 4827 // event so that whoever is receiving it will know to wait for the running event and reflect 4828 // that state appropriately. 4829 // We also need to stop processing actions, since they aren't expecting the target to be running. 4830 4831 // FIXME: we might have run. 4832 if (stop_info_sp->HasTargetRunSinceMe()) 4833 { 4834 SetRestarted (true); 4835 break; 4836 } 4837 4838 this_thread_wants_to_stop = stop_info_sp->ShouldStop(event_ptr); 4839 } 4840 4841 if (still_should_stop == false) 4842 still_should_stop = this_thread_wants_to_stop; 4843 } 4844 } 4845 4846 4847 if (!GetRestarted()) 4848 { 4849 if (!still_should_stop && does_anybody_have_an_opinion) 4850 { 4851 // We've been asked to continue, so do that here. 4852 SetRestarted(true); 4853 // Use the public resume method here, since this is just 4854 // extending a public resume. 4855 process_sp->PrivateResume(); 4856 } 4857 else 4858 { 4859 // If we didn't restart, run the Stop Hooks here: 4860 // They might also restart the target, so watch for that. 4861 process_sp->GetTarget().RunStopHooks(); 4862 if (process_sp->GetPrivateState() == eStateRunning) 4863 SetRestarted(true); 4864 } 4865 } 4866 } 4867 } 4868 4869 void 4870 Process::ProcessEventData::Dump (Stream *s) const 4871 { 4872 ProcessSP process_sp(m_process_wp.lock()); 4873 4874 if (process_sp) 4875 s->Printf(" process = %p (pid = %" PRIu64 "), ", 4876 static_cast<void*>(process_sp.get()), process_sp->GetID()); 4877 else 4878 s->PutCString(" process = NULL, "); 4879 4880 s->Printf("state = %s", StateAsCString(GetState())); 4881 } 4882 4883 const Process::ProcessEventData * 4884 Process::ProcessEventData::GetEventDataFromEvent (const Event *event_ptr) 4885 { 4886 if (event_ptr) 4887 { 4888 const EventData *event_data = event_ptr->GetData(); 4889 if (event_data && event_data->GetFlavor() == ProcessEventData::GetFlavorString()) 4890 return static_cast <const ProcessEventData *> (event_ptr->GetData()); 4891 } 4892 return NULL; 4893 } 4894 4895 ProcessSP 4896 Process::ProcessEventData::GetProcessFromEvent (const Event *event_ptr) 4897 { 4898 ProcessSP process_sp; 4899 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4900 if (data) 4901 process_sp = data->GetProcessSP(); 4902 return process_sp; 4903 } 4904 4905 StateType 4906 Process::ProcessEventData::GetStateFromEvent (const Event *event_ptr) 4907 { 4908 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4909 if (data == NULL) 4910 return eStateInvalid; 4911 else 4912 return data->GetState(); 4913 } 4914 4915 bool 4916 Process::ProcessEventData::GetRestartedFromEvent (const Event *event_ptr) 4917 { 4918 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4919 if (data == NULL) 4920 return false; 4921 else 4922 return data->GetRestarted(); 4923 } 4924 4925 void 4926 Process::ProcessEventData::SetRestartedInEvent (Event *event_ptr, bool new_value) 4927 { 4928 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4929 if (data != NULL) 4930 data->SetRestarted(new_value); 4931 } 4932 4933 size_t 4934 Process::ProcessEventData::GetNumRestartedReasons(const Event *event_ptr) 4935 { 4936 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4937 if (data != NULL) 4938 return data->GetNumRestartedReasons(); 4939 else 4940 return 0; 4941 } 4942 4943 const char * 4944 Process::ProcessEventData::GetRestartedReasonAtIndex(const Event *event_ptr, size_t idx) 4945 { 4946 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4947 if (data != NULL) 4948 return data->GetRestartedReasonAtIndex(idx); 4949 else 4950 return NULL; 4951 } 4952 4953 void 4954 Process::ProcessEventData::AddRestartedReason (Event *event_ptr, const char *reason) 4955 { 4956 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4957 if (data != NULL) 4958 data->AddRestartedReason(reason); 4959 } 4960 4961 bool 4962 Process::ProcessEventData::GetInterruptedFromEvent (const Event *event_ptr) 4963 { 4964 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4965 if (data == NULL) 4966 return false; 4967 else 4968 return data->GetInterrupted (); 4969 } 4970 4971 void 4972 Process::ProcessEventData::SetInterruptedInEvent (Event *event_ptr, bool new_value) 4973 { 4974 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4975 if (data != NULL) 4976 data->SetInterrupted(new_value); 4977 } 4978 4979 bool 4980 Process::ProcessEventData::SetUpdateStateOnRemoval (Event *event_ptr) 4981 { 4982 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4983 if (data) 4984 { 4985 data->SetUpdateStateOnRemoval(); 4986 return true; 4987 } 4988 return false; 4989 } 4990 4991 lldb::TargetSP 4992 Process::CalculateTarget () 4993 { 4994 return m_target_sp.lock(); 4995 } 4996 4997 void 4998 Process::CalculateExecutionContext (ExecutionContext &exe_ctx) 4999 { 5000 exe_ctx.SetTargetPtr (&GetTarget()); 5001 exe_ctx.SetProcessPtr (this); 5002 exe_ctx.SetThreadPtr(NULL); 5003 exe_ctx.SetFramePtr (NULL); 5004 } 5005 5006 //uint32_t 5007 //Process::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 5008 //{ 5009 // return 0; 5010 //} 5011 // 5012 //ArchSpec 5013 //Process::GetArchSpecForExistingProcess (lldb::pid_t pid) 5014 //{ 5015 // return Host::GetArchSpecForExistingProcess (pid); 5016 //} 5017 // 5018 //ArchSpec 5019 //Process::GetArchSpecForExistingProcess (const char *process_name) 5020 //{ 5021 // return Host::GetArchSpecForExistingProcess (process_name); 5022 //} 5023 // 5024 void 5025 Process::AppendSTDOUT (const char * s, size_t len) 5026 { 5027 Mutex::Locker locker (m_stdio_communication_mutex); 5028 m_stdout_data.append (s, len); 5029 BroadcastEventIfUnique (eBroadcastBitSTDOUT, new ProcessEventData (shared_from_this(), GetState())); 5030 } 5031 5032 void 5033 Process::AppendSTDERR (const char * s, size_t len) 5034 { 5035 Mutex::Locker locker (m_stdio_communication_mutex); 5036 m_stderr_data.append (s, len); 5037 BroadcastEventIfUnique (eBroadcastBitSTDERR, new ProcessEventData (shared_from_this(), GetState())); 5038 } 5039 5040 void 5041 Process::BroadcastAsyncProfileData(const std::string &one_profile_data) 5042 { 5043 Mutex::Locker locker (m_profile_data_comm_mutex); 5044 m_profile_data.push_back(one_profile_data); 5045 BroadcastEventIfUnique (eBroadcastBitProfileData, new ProcessEventData (shared_from_this(), GetState())); 5046 } 5047 5048 size_t 5049 Process::GetAsyncProfileData (char *buf, size_t buf_size, Error &error) 5050 { 5051 Mutex::Locker locker(m_profile_data_comm_mutex); 5052 if (m_profile_data.empty()) 5053 return 0; 5054 5055 std::string &one_profile_data = m_profile_data.front(); 5056 size_t bytes_available = one_profile_data.size(); 5057 if (bytes_available > 0) 5058 { 5059 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5060 if (log) 5061 log->Printf ("Process::GetProfileData (buf = %p, size = %" PRIu64 ")", 5062 static_cast<void*>(buf), 5063 static_cast<uint64_t>(buf_size)); 5064 if (bytes_available > buf_size) 5065 { 5066 memcpy(buf, one_profile_data.c_str(), buf_size); 5067 one_profile_data.erase(0, buf_size); 5068 bytes_available = buf_size; 5069 } 5070 else 5071 { 5072 memcpy(buf, one_profile_data.c_str(), bytes_available); 5073 m_profile_data.erase(m_profile_data.begin()); 5074 } 5075 } 5076 return bytes_available; 5077 } 5078 5079 5080 //------------------------------------------------------------------ 5081 // Process STDIO 5082 //------------------------------------------------------------------ 5083 5084 size_t 5085 Process::GetSTDOUT (char *buf, size_t buf_size, Error &error) 5086 { 5087 Mutex::Locker locker(m_stdio_communication_mutex); 5088 size_t bytes_available = m_stdout_data.size(); 5089 if (bytes_available > 0) 5090 { 5091 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5092 if (log) 5093 log->Printf ("Process::GetSTDOUT (buf = %p, size = %" PRIu64 ")", 5094 static_cast<void*>(buf), 5095 static_cast<uint64_t>(buf_size)); 5096 if (bytes_available > buf_size) 5097 { 5098 memcpy(buf, m_stdout_data.c_str(), buf_size); 5099 m_stdout_data.erase(0, buf_size); 5100 bytes_available = buf_size; 5101 } 5102 else 5103 { 5104 memcpy(buf, m_stdout_data.c_str(), bytes_available); 5105 m_stdout_data.clear(); 5106 } 5107 } 5108 return bytes_available; 5109 } 5110 5111 5112 size_t 5113 Process::GetSTDERR (char *buf, size_t buf_size, Error &error) 5114 { 5115 Mutex::Locker locker(m_stdio_communication_mutex); 5116 size_t bytes_available = m_stderr_data.size(); 5117 if (bytes_available > 0) 5118 { 5119 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5120 if (log) 5121 log->Printf ("Process::GetSTDERR (buf = %p, size = %" PRIu64 ")", 5122 static_cast<void*>(buf), 5123 static_cast<uint64_t>(buf_size)); 5124 if (bytes_available > buf_size) 5125 { 5126 memcpy(buf, m_stderr_data.c_str(), buf_size); 5127 m_stderr_data.erase(0, buf_size); 5128 bytes_available = buf_size; 5129 } 5130 else 5131 { 5132 memcpy(buf, m_stderr_data.c_str(), bytes_available); 5133 m_stderr_data.clear(); 5134 } 5135 } 5136 return bytes_available; 5137 } 5138 5139 void 5140 Process::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len) 5141 { 5142 Process *process = (Process *) baton; 5143 process->AppendSTDOUT (static_cast<const char *>(src), src_len); 5144 } 5145 5146 class IOHandlerProcessSTDIO : 5147 public IOHandler 5148 { 5149 public: 5150 IOHandlerProcessSTDIO (Process *process, 5151 int write_fd) : 5152 IOHandler(process->GetTarget().GetDebugger(), IOHandler::Type::ProcessIO), 5153 m_process (process), 5154 m_read_file (), 5155 m_write_file (write_fd, false), 5156 m_pipe () 5157 { 5158 m_pipe.CreateNew(false); 5159 m_read_file.SetDescriptor(GetInputFD(), false); 5160 } 5161 5162 virtual 5163 ~IOHandlerProcessSTDIO () 5164 { 5165 5166 } 5167 5168 // Each IOHandler gets to run until it is done. It should read data 5169 // from the "in" and place output into "out" and "err and return 5170 // when done. 5171 void 5172 Run () override 5173 { 5174 if (!m_read_file.IsValid() || !m_write_file.IsValid() || !m_pipe.CanRead() || !m_pipe.CanWrite()) 5175 { 5176 SetIsDone(true); 5177 return; 5178 } 5179 5180 SetIsDone(false); 5181 const int read_fd = m_read_file.GetDescriptor(); 5182 TerminalState terminal_state; 5183 terminal_state.Save (read_fd, false); 5184 Terminal terminal(read_fd); 5185 terminal.SetCanonical(false); 5186 terminal.SetEcho(false); 5187 // FD_ZERO, FD_SET are not supported on windows 5188 #ifndef _WIN32 5189 const int pipe_read_fd = m_pipe.GetReadFileDescriptor(); 5190 while (!GetIsDone()) 5191 { 5192 fd_set read_fdset; 5193 FD_ZERO (&read_fdset); 5194 FD_SET (read_fd, &read_fdset); 5195 FD_SET (pipe_read_fd, &read_fdset); 5196 const int nfds = std::max<int>(read_fd, pipe_read_fd) + 1; 5197 int num_set_fds = select (nfds, &read_fdset, NULL, NULL, NULL); 5198 if (num_set_fds < 0) 5199 { 5200 const int select_errno = errno; 5201 5202 if (select_errno != EINTR) 5203 SetIsDone(true); 5204 } 5205 else if (num_set_fds > 0) 5206 { 5207 char ch = 0; 5208 size_t n; 5209 if (FD_ISSET (read_fd, &read_fdset)) 5210 { 5211 n = 1; 5212 if (m_read_file.Read(&ch, n).Success() && n == 1) 5213 { 5214 if (m_write_file.Write(&ch, n).Fail() || n != 1) 5215 SetIsDone(true); 5216 } 5217 else 5218 SetIsDone(true); 5219 } 5220 if (FD_ISSET (pipe_read_fd, &read_fdset)) 5221 { 5222 size_t bytes_read; 5223 // Consume the interrupt byte 5224 Error error = m_pipe.Read(&ch, 1, bytes_read); 5225 if (error.Success()) 5226 { 5227 switch (ch) 5228 { 5229 case 'q': 5230 SetIsDone(true); 5231 break; 5232 case 'i': 5233 if (StateIsRunningState(m_process->GetState())) 5234 m_process->Halt(); 5235 break; 5236 } 5237 } 5238 } 5239 } 5240 } 5241 #endif 5242 terminal_state.Restore(); 5243 } 5244 5245 void 5246 Cancel () override 5247 { 5248 char ch = 'q'; // Send 'q' for quit 5249 size_t bytes_written = 0; 5250 m_pipe.Write(&ch, 1, bytes_written); 5251 } 5252 5253 bool 5254 Interrupt () override 5255 { 5256 // Do only things that are safe to do in an interrupt context (like in 5257 // a SIGINT handler), like write 1 byte to a file descriptor. This will 5258 // interrupt the IOHandlerProcessSTDIO::Run() and we can look at the byte 5259 // that was written to the pipe and then call m_process->Halt() from a 5260 // much safer location in code. 5261 if (m_active) 5262 { 5263 char ch = 'i'; // Send 'i' for interrupt 5264 size_t bytes_written = 0; 5265 Error result = m_pipe.Write(&ch, 1, bytes_written); 5266 return result.Success(); 5267 } 5268 else 5269 { 5270 // This IOHandler might be pushed on the stack, but not being run currently 5271 // so do the right thing if we aren't actively watching for STDIN by sending 5272 // the interrupt to the process. Otherwise the write to the pipe above would 5273 // do nothing. This can happen when the command interpreter is running and 5274 // gets a "expression ...". It will be on the IOHandler thread and sending 5275 // the input is complete to the delegate which will cause the expression to 5276 // run, which will push the process IO handler, but not run it. 5277 5278 if (StateIsRunningState(m_process->GetState())) 5279 { 5280 m_process->SendAsyncInterrupt(); 5281 return true; 5282 } 5283 } 5284 return false; 5285 } 5286 5287 void 5288 GotEOF() override 5289 { 5290 5291 } 5292 5293 protected: 5294 Process *m_process; 5295 File m_read_file; // Read from this file (usually actual STDIN for LLDB 5296 File m_write_file; // Write to this file (usually the master pty for getting io to debuggee) 5297 Pipe m_pipe; 5298 }; 5299 5300 void 5301 Process::SetSTDIOFileDescriptor (int fd) 5302 { 5303 // First set up the Read Thread for reading/handling process I/O 5304 5305 std::unique_ptr<ConnectionFileDescriptor> conn_ap (new ConnectionFileDescriptor (fd, true)); 5306 5307 if (conn_ap.get()) 5308 { 5309 m_stdio_communication.SetConnection (conn_ap.release()); 5310 if (m_stdio_communication.IsConnected()) 5311 { 5312 m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this); 5313 m_stdio_communication.StartReadThread(); 5314 5315 // Now read thread is set up, set up input reader. 5316 5317 if (!m_process_input_reader.get()) 5318 m_process_input_reader.reset (new IOHandlerProcessSTDIO (this, fd)); 5319 } 5320 } 5321 } 5322 5323 bool 5324 Process::ProcessIOHandlerIsActive () 5325 { 5326 IOHandlerSP io_handler_sp (m_process_input_reader); 5327 if (io_handler_sp) 5328 return GetTarget().GetDebugger().IsTopIOHandler (io_handler_sp); 5329 return false; 5330 } 5331 bool 5332 Process::PushProcessIOHandler () 5333 { 5334 IOHandlerSP io_handler_sp (m_process_input_reader); 5335 if (io_handler_sp) 5336 { 5337 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5338 if (log) 5339 log->Printf("Process::%s pushing IO handler", __FUNCTION__); 5340 5341 io_handler_sp->SetIsDone(false); 5342 GetTarget().GetDebugger().PushIOHandler (io_handler_sp); 5343 return true; 5344 } 5345 return false; 5346 } 5347 5348 bool 5349 Process::PopProcessIOHandler () 5350 { 5351 IOHandlerSP io_handler_sp (m_process_input_reader); 5352 if (io_handler_sp) 5353 return GetTarget().GetDebugger().PopIOHandler (io_handler_sp); 5354 return false; 5355 } 5356 5357 // The process needs to know about installed plug-ins 5358 void 5359 Process::SettingsInitialize () 5360 { 5361 Thread::SettingsInitialize (); 5362 } 5363 5364 void 5365 Process::SettingsTerminate () 5366 { 5367 Thread::SettingsTerminate (); 5368 } 5369 5370 ExpressionResults 5371 Process::RunThreadPlan (ExecutionContext &exe_ctx, 5372 lldb::ThreadPlanSP &thread_plan_sp, 5373 const EvaluateExpressionOptions &options, 5374 Stream &errors) 5375 { 5376 ExpressionResults return_value = eExpressionSetupError; 5377 5378 if (thread_plan_sp.get() == NULL) 5379 { 5380 errors.Printf("RunThreadPlan called with empty thread plan."); 5381 return eExpressionSetupError; 5382 } 5383 5384 if (!thread_plan_sp->ValidatePlan(NULL)) 5385 { 5386 errors.Printf ("RunThreadPlan called with an invalid thread plan."); 5387 return eExpressionSetupError; 5388 } 5389 5390 if (exe_ctx.GetProcessPtr() != this) 5391 { 5392 errors.Printf("RunThreadPlan called on wrong process."); 5393 return eExpressionSetupError; 5394 } 5395 5396 Thread *thread = exe_ctx.GetThreadPtr(); 5397 if (thread == NULL) 5398 { 5399 errors.Printf("RunThreadPlan called with invalid thread."); 5400 return eExpressionSetupError; 5401 } 5402 5403 // We rely on the thread plan we are running returning "PlanCompleted" if when it successfully completes. 5404 // For that to be true the plan can't be private - since private plans suppress themselves in the 5405 // GetCompletedPlan call. 5406 5407 bool orig_plan_private = thread_plan_sp->GetPrivate(); 5408 thread_plan_sp->SetPrivate(false); 5409 5410 if (m_private_state.GetValue() != eStateStopped) 5411 { 5412 errors.Printf ("RunThreadPlan called while the private state was not stopped."); 5413 return eExpressionSetupError; 5414 } 5415 5416 // Save the thread & frame from the exe_ctx for restoration after we run 5417 const uint32_t thread_idx_id = thread->GetIndexID(); 5418 StackFrameSP selected_frame_sp = thread->GetSelectedFrame(); 5419 if (!selected_frame_sp) 5420 { 5421 thread->SetSelectedFrame(0); 5422 selected_frame_sp = thread->GetSelectedFrame(); 5423 if (!selected_frame_sp) 5424 { 5425 errors.Printf("RunThreadPlan called without a selected frame on thread %d", thread_idx_id); 5426 return eExpressionSetupError; 5427 } 5428 } 5429 5430 StackID ctx_frame_id = selected_frame_sp->GetStackID(); 5431 5432 // N.B. Running the target may unset the currently selected thread and frame. We don't want to do that either, 5433 // so we should arrange to reset them as well. 5434 5435 lldb::ThreadSP selected_thread_sp = GetThreadList().GetSelectedThread(); 5436 5437 uint32_t selected_tid; 5438 StackID selected_stack_id; 5439 if (selected_thread_sp) 5440 { 5441 selected_tid = selected_thread_sp->GetIndexID(); 5442 selected_stack_id = selected_thread_sp->GetSelectedFrame()->GetStackID(); 5443 } 5444 else 5445 { 5446 selected_tid = LLDB_INVALID_THREAD_ID; 5447 } 5448 5449 HostThread backup_private_state_thread; 5450 lldb::StateType old_state = eStateInvalid; 5451 lldb::ThreadPlanSP stopper_base_plan_sp; 5452 5453 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 5454 if (m_private_state_thread.EqualsThread(Host::GetCurrentThread())) 5455 { 5456 // Yikes, we are running on the private state thread! So we can't wait for public events on this thread, since 5457 // we are the thread that is generating public events. 5458 // The simplest thing to do is to spin up a temporary thread to handle private state thread events while 5459 // we are fielding public events here. 5460 if (log) 5461 log->Printf ("Running thread plan on private state thread, spinning up another state thread to handle the events."); 5462 5463 backup_private_state_thread = m_private_state_thread; 5464 5465 // One other bit of business: we want to run just this thread plan and anything it pushes, and then stop, 5466 // returning control here. 5467 // But in the normal course of things, the plan above us on the stack would be given a shot at the stop 5468 // event before deciding to stop, and we don't want that. So we insert a "stopper" base plan on the stack 5469 // before the plan we want to run. Since base plans always stop and return control to the user, that will 5470 // do just what we want. 5471 stopper_base_plan_sp.reset(new ThreadPlanBase (*thread)); 5472 thread->QueueThreadPlan (stopper_base_plan_sp, false); 5473 // Have to make sure our public state is stopped, since otherwise the reporting logic below doesn't work correctly. 5474 old_state = m_public_state.GetValue(); 5475 m_public_state.SetValueNoLock(eStateStopped); 5476 5477 // Now spin up the private state thread: 5478 StartPrivateStateThread(true); 5479 } 5480 5481 thread->QueueThreadPlan(thread_plan_sp, false); // This used to pass "true" does that make sense? 5482 5483 if (options.GetDebug()) 5484 { 5485 // In this case, we aren't actually going to run, we just want to stop right away. 5486 // Flush this thread so we will refetch the stacks and show the correct backtrace. 5487 // FIXME: To make this prettier we should invent some stop reason for this, but that 5488 // is only cosmetic, and this functionality is only of use to lldb developers who can 5489 // live with not pretty... 5490 thread->Flush(); 5491 return eExpressionStoppedForDebug; 5492 } 5493 5494 Listener listener("lldb.process.listener.run-thread-plan"); 5495 5496 lldb::EventSP event_to_broadcast_sp; 5497 5498 { 5499 // This process event hijacker Hijacks the Public events and its destructor makes sure that the process events get 5500 // restored on exit to the function. 5501 // 5502 // If the event needs to propagate beyond the hijacker (e.g., the process exits during execution), then the event 5503 // is put into event_to_broadcast_sp for rebroadcasting. 5504 5505 ProcessEventHijacker run_thread_plan_hijacker (*this, &listener); 5506 5507 if (log) 5508 { 5509 StreamString s; 5510 thread_plan_sp->GetDescription(&s, lldb::eDescriptionLevelVerbose); 5511 log->Printf ("Process::RunThreadPlan(): Resuming thread %u - 0x%4.4" PRIx64 " to run thread plan \"%s\".", 5512 thread->GetIndexID(), 5513 thread->GetID(), 5514 s.GetData()); 5515 } 5516 5517 bool got_event; 5518 lldb::EventSP event_sp; 5519 lldb::StateType stop_state = lldb::eStateInvalid; 5520 5521 TimeValue* timeout_ptr = NULL; 5522 TimeValue real_timeout; 5523 5524 bool before_first_timeout = true; // This is set to false the first time that we have to halt the target. 5525 bool do_resume = true; 5526 bool handle_running_event = true; 5527 const uint64_t default_one_thread_timeout_usec = 250000; 5528 5529 // This is just for accounting: 5530 uint32_t num_resumes = 0; 5531 5532 uint32_t timeout_usec = options.GetTimeoutUsec(); 5533 uint32_t one_thread_timeout_usec; 5534 uint32_t all_threads_timeout_usec = 0; 5535 5536 // If we are going to run all threads the whole time, or if we are only going to run one thread, 5537 // then we don't need the first timeout. So we set the final timeout, and pretend we are after the 5538 // first timeout already. 5539 5540 if (!options.GetStopOthers() || !options.GetTryAllThreads()) 5541 { 5542 before_first_timeout = false; 5543 one_thread_timeout_usec = 0; 5544 all_threads_timeout_usec = timeout_usec; 5545 } 5546 else 5547 { 5548 uint32_t option_one_thread_timeout = options.GetOneThreadTimeoutUsec(); 5549 5550 // If the overall wait is forever, then we only need to set the one thread timeout: 5551 if (timeout_usec == 0) 5552 { 5553 if (option_one_thread_timeout != 0) 5554 one_thread_timeout_usec = option_one_thread_timeout; 5555 else 5556 one_thread_timeout_usec = default_one_thread_timeout_usec; 5557 } 5558 else 5559 { 5560 // Otherwise, if the one thread timeout is set, make sure it isn't longer than the overall timeout, 5561 // and use it, otherwise use half the total timeout, bounded by the default_one_thread_timeout_usec. 5562 uint64_t computed_one_thread_timeout; 5563 if (option_one_thread_timeout != 0) 5564 { 5565 if (timeout_usec < option_one_thread_timeout) 5566 { 5567 errors.Printf("RunThreadPlan called without one thread timeout greater than total timeout"); 5568 return eExpressionSetupError; 5569 } 5570 computed_one_thread_timeout = option_one_thread_timeout; 5571 } 5572 else 5573 { 5574 computed_one_thread_timeout = timeout_usec / 2; 5575 if (computed_one_thread_timeout > default_one_thread_timeout_usec) 5576 computed_one_thread_timeout = default_one_thread_timeout_usec; 5577 } 5578 one_thread_timeout_usec = computed_one_thread_timeout; 5579 all_threads_timeout_usec = timeout_usec - one_thread_timeout_usec; 5580 5581 } 5582 } 5583 5584 if (log) 5585 log->Printf ("Stop others: %u, try all: %u, before_first: %u, one thread: %" PRIu32 " - all threads: %" PRIu32 ".\n", 5586 options.GetStopOthers(), 5587 options.GetTryAllThreads(), 5588 before_first_timeout, 5589 one_thread_timeout_usec, 5590 all_threads_timeout_usec); 5591 5592 // This isn't going to work if there are unfetched events on the queue. 5593 // Are there cases where we might want to run the remaining events here, and then try to 5594 // call the function? That's probably being too tricky for our own good. 5595 5596 Event *other_events = listener.PeekAtNextEvent(); 5597 if (other_events != NULL) 5598 { 5599 errors.Printf("Calling RunThreadPlan with pending events on the queue."); 5600 return eExpressionSetupError; 5601 } 5602 5603 // We also need to make sure that the next event is delivered. We might be calling a function as part of 5604 // a thread plan, in which case the last delivered event could be the running event, and we don't want 5605 // event coalescing to cause us to lose OUR running event... 5606 ForceNextEventDelivery(); 5607 5608 // This while loop must exit out the bottom, there's cleanup that we need to do when we are done. 5609 // So don't call return anywhere within it. 5610 5611 #ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT 5612 // It's pretty much impossible to write test cases for things like: 5613 // One thread timeout expires, I go to halt, but the process already stopped 5614 // on the function call stop breakpoint. Turning on this define will make us not 5615 // fetch the first event till after the halt. So if you run a quick function, it will have 5616 // completed, and the completion event will be waiting, when you interrupt for halt. 5617 // The expression evaluation should still succeed. 5618 bool miss_first_event = true; 5619 #endif 5620 TimeValue one_thread_timeout; 5621 TimeValue final_timeout; 5622 5623 5624 while (1) 5625 { 5626 // We usually want to resume the process if we get to the top of the loop. 5627 // The only exception is if we get two running events with no intervening 5628 // stop, which can happen, we will just wait for then next stop event. 5629 if (log) 5630 log->Printf ("Top of while loop: do_resume: %i handle_running_event: %i before_first_timeout: %i.", 5631 do_resume, 5632 handle_running_event, 5633 before_first_timeout); 5634 5635 if (do_resume || handle_running_event) 5636 { 5637 // Do the initial resume and wait for the running event before going further. 5638 5639 if (do_resume) 5640 { 5641 num_resumes++; 5642 Error resume_error = PrivateResume (); 5643 if (!resume_error.Success()) 5644 { 5645 errors.Printf("Error resuming inferior the %d time: \"%s\".\n", 5646 num_resumes, 5647 resume_error.AsCString()); 5648 return_value = eExpressionSetupError; 5649 break; 5650 } 5651 } 5652 5653 TimeValue resume_timeout = TimeValue::Now(); 5654 resume_timeout.OffsetWithMicroSeconds(500000); 5655 5656 got_event = listener.WaitForEvent(&resume_timeout, event_sp); 5657 if (!got_event) 5658 { 5659 if (log) 5660 log->Printf ("Process::RunThreadPlan(): didn't get any event after resume %d, exiting.", 5661 num_resumes); 5662 5663 errors.Printf("Didn't get any event after resume %d, exiting.", num_resumes); 5664 return_value = eExpressionSetupError; 5665 break; 5666 } 5667 5668 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5669 5670 if (stop_state != eStateRunning) 5671 { 5672 bool restarted = false; 5673 5674 if (stop_state == eStateStopped) 5675 { 5676 restarted = Process::ProcessEventData::GetRestartedFromEvent(event_sp.get()); 5677 if (log) 5678 log->Printf("Process::RunThreadPlan(): didn't get running event after " 5679 "resume %d, got %s instead (restarted: %i, do_resume: %i, handle_running_event: %i).", 5680 num_resumes, 5681 StateAsCString(stop_state), 5682 restarted, 5683 do_resume, 5684 handle_running_event); 5685 } 5686 5687 if (restarted) 5688 { 5689 // This is probably an overabundance of caution, I don't think I should ever get a stopped & restarted 5690 // event here. But if I do, the best thing is to Halt and then get out of here. 5691 Halt(); 5692 } 5693 5694 errors.Printf("Didn't get running event after initial resume, got %s instead.", 5695 StateAsCString(stop_state)); 5696 return_value = eExpressionSetupError; 5697 break; 5698 } 5699 5700 if (log) 5701 log->PutCString ("Process::RunThreadPlan(): resuming succeeded."); 5702 // We need to call the function synchronously, so spin waiting for it to return. 5703 // If we get interrupted while executing, we're going to lose our context, and 5704 // won't be able to gather the result at this point. 5705 // We set the timeout AFTER the resume, since the resume takes some time and we 5706 // don't want to charge that to the timeout. 5707 } 5708 else 5709 { 5710 if (log) 5711 log->PutCString ("Process::RunThreadPlan(): waiting for next event."); 5712 } 5713 5714 if (before_first_timeout) 5715 { 5716 if (options.GetTryAllThreads()) 5717 { 5718 one_thread_timeout = TimeValue::Now(); 5719 one_thread_timeout.OffsetWithMicroSeconds(one_thread_timeout_usec); 5720 timeout_ptr = &one_thread_timeout; 5721 } 5722 else 5723 { 5724 if (timeout_usec == 0) 5725 timeout_ptr = NULL; 5726 else 5727 { 5728 final_timeout = TimeValue::Now(); 5729 final_timeout.OffsetWithMicroSeconds (timeout_usec); 5730 timeout_ptr = &final_timeout; 5731 } 5732 } 5733 } 5734 else 5735 { 5736 if (timeout_usec == 0) 5737 timeout_ptr = NULL; 5738 else 5739 { 5740 final_timeout = TimeValue::Now(); 5741 final_timeout.OffsetWithMicroSeconds (all_threads_timeout_usec); 5742 timeout_ptr = &final_timeout; 5743 } 5744 } 5745 5746 do_resume = true; 5747 handle_running_event = true; 5748 5749 // Now wait for the process to stop again: 5750 event_sp.reset(); 5751 5752 if (log) 5753 { 5754 if (timeout_ptr) 5755 { 5756 log->Printf ("Process::RunThreadPlan(): about to wait - now is %" PRIu64 " - endpoint is %" PRIu64, 5757 TimeValue::Now().GetAsMicroSecondsSinceJan1_1970(), 5758 timeout_ptr->GetAsMicroSecondsSinceJan1_1970()); 5759 } 5760 else 5761 { 5762 log->Printf ("Process::RunThreadPlan(): about to wait forever."); 5763 } 5764 } 5765 5766 #ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT 5767 // See comment above... 5768 if (miss_first_event) 5769 { 5770 usleep(1000); 5771 miss_first_event = false; 5772 got_event = false; 5773 } 5774 else 5775 #endif 5776 got_event = listener.WaitForEvent (timeout_ptr, event_sp); 5777 5778 if (got_event) 5779 { 5780 if (event_sp.get()) 5781 { 5782 bool keep_going = false; 5783 if (event_sp->GetType() == eBroadcastBitInterrupt) 5784 { 5785 Halt(); 5786 return_value = eExpressionInterrupted; 5787 errors.Printf ("Execution halted by user interrupt."); 5788 if (log) 5789 log->Printf ("Process::RunThreadPlan(): Got interrupted by eBroadcastBitInterrupted, exiting."); 5790 break; 5791 } 5792 else 5793 { 5794 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5795 if (log) 5796 log->Printf("Process::RunThreadPlan(): in while loop, got event: %s.", StateAsCString(stop_state)); 5797 5798 switch (stop_state) 5799 { 5800 case lldb::eStateStopped: 5801 { 5802 // We stopped, figure out what we are going to do now. 5803 ThreadSP thread_sp = GetThreadList().FindThreadByIndexID (thread_idx_id); 5804 if (!thread_sp) 5805 { 5806 // Ooh, our thread has vanished. Unlikely that this was successful execution... 5807 if (log) 5808 log->Printf ("Process::RunThreadPlan(): execution completed but our thread (index-id=%u) has vanished.", thread_idx_id); 5809 return_value = eExpressionInterrupted; 5810 } 5811 else 5812 { 5813 // If we were restarted, we just need to go back up to fetch another event. 5814 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5815 { 5816 if (log) 5817 { 5818 log->Printf ("Process::RunThreadPlan(): Got a stop and restart, so we'll continue waiting."); 5819 } 5820 keep_going = true; 5821 do_resume = false; 5822 handle_running_event = true; 5823 5824 } 5825 else 5826 { 5827 StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 5828 StopReason stop_reason = eStopReasonInvalid; 5829 if (stop_info_sp) 5830 stop_reason = stop_info_sp->GetStopReason(); 5831 5832 // FIXME: We only check if the stop reason is plan complete, should we make sure that 5833 // it is OUR plan that is complete? 5834 if (stop_reason == eStopReasonPlanComplete) 5835 { 5836 if (log) 5837 log->PutCString ("Process::RunThreadPlan(): execution completed successfully."); 5838 // Now mark this plan as private so it doesn't get reported as the stop reason 5839 // after this point. 5840 if (thread_plan_sp) 5841 thread_plan_sp->SetPrivate (orig_plan_private); 5842 return_value = eExpressionCompleted; 5843 } 5844 else 5845 { 5846 // Something restarted the target, so just wait for it to stop for real. 5847 if (stop_reason == eStopReasonBreakpoint) 5848 { 5849 if (log) 5850 log->Printf ("Process::RunThreadPlan() stopped for breakpoint: %s.", stop_info_sp->GetDescription()); 5851 return_value = eExpressionHitBreakpoint; 5852 if (!options.DoesIgnoreBreakpoints()) 5853 { 5854 event_to_broadcast_sp = event_sp; 5855 } 5856 } 5857 else 5858 { 5859 if (log) 5860 log->PutCString ("Process::RunThreadPlan(): thread plan didn't successfully complete."); 5861 if (!options.DoesUnwindOnError()) 5862 event_to_broadcast_sp = event_sp; 5863 return_value = eExpressionInterrupted; 5864 } 5865 } 5866 } 5867 } 5868 } 5869 break; 5870 5871 case lldb::eStateRunning: 5872 // This shouldn't really happen, but sometimes we do get two running events without an 5873 // intervening stop, and in that case we should just go back to waiting for the stop. 5874 do_resume = false; 5875 keep_going = true; 5876 handle_running_event = false; 5877 break; 5878 5879 default: 5880 if (log) 5881 log->Printf("Process::RunThreadPlan(): execution stopped with unexpected state: %s.", StateAsCString(stop_state)); 5882 5883 if (stop_state == eStateExited) 5884 event_to_broadcast_sp = event_sp; 5885 5886 errors.Printf ("Execution stopped with unexpected state.\n"); 5887 return_value = eExpressionInterrupted; 5888 break; 5889 } 5890 } 5891 5892 if (keep_going) 5893 continue; 5894 else 5895 break; 5896 } 5897 else 5898 { 5899 if (log) 5900 log->PutCString ("Process::RunThreadPlan(): got_event was true, but the event pointer was null. How odd..."); 5901 return_value = eExpressionInterrupted; 5902 break; 5903 } 5904 } 5905 else 5906 { 5907 // If we didn't get an event that means we've timed out... 5908 // We will interrupt the process here. Depending on what we were asked to do we will 5909 // either exit, or try with all threads running for the same timeout. 5910 5911 if (log) { 5912 if (options.GetTryAllThreads()) 5913 { 5914 if (before_first_timeout) 5915 { 5916 if (timeout_usec != 0) 5917 { 5918 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5919 "running for %" PRIu32 " usec with all threads enabled.", 5920 all_threads_timeout_usec); 5921 } 5922 else 5923 { 5924 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5925 "running forever with all threads enabled."); 5926 } 5927 } 5928 else 5929 log->Printf ("Process::RunThreadPlan(): Restarting function with all threads enabled " 5930 "and timeout: %u timed out, abandoning execution.", 5931 timeout_usec); 5932 } 5933 else 5934 log->Printf ("Process::RunThreadPlan(): Running function with timeout: %u timed out, " 5935 "abandoning execution.", 5936 timeout_usec); 5937 } 5938 5939 // It is possible that between the time we issued the Halt, and we get around to calling Halt the target 5940 // could have stopped. That's fine, Halt will figure that out and send the appropriate Stopped event. 5941 // BUT it is also possible that we stopped & restarted (e.g. hit a signal with "stop" set to false.) In 5942 // that case, we'll get the stopped & restarted event, and we should go back to waiting for the Halt's 5943 // stopped event. That's what this while loop does. 5944 5945 bool back_to_top = true; 5946 uint32_t try_halt_again = 0; 5947 bool do_halt = true; 5948 const uint32_t num_retries = 5; 5949 while (try_halt_again < num_retries) 5950 { 5951 Error halt_error; 5952 if (do_halt) 5953 { 5954 if (log) 5955 log->Printf ("Process::RunThreadPlan(): Running Halt."); 5956 halt_error = Halt(); 5957 } 5958 if (halt_error.Success()) 5959 { 5960 if (log) 5961 log->PutCString ("Process::RunThreadPlan(): Halt succeeded."); 5962 5963 real_timeout = TimeValue::Now(); 5964 real_timeout.OffsetWithMicroSeconds(500000); 5965 5966 got_event = listener.WaitForEvent(&real_timeout, event_sp); 5967 5968 if (got_event) 5969 { 5970 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5971 if (log) 5972 { 5973 log->Printf ("Process::RunThreadPlan(): Stopped with event: %s", StateAsCString(stop_state)); 5974 if (stop_state == lldb::eStateStopped 5975 && Process::ProcessEventData::GetInterruptedFromEvent(event_sp.get())) 5976 log->PutCString (" Event was the Halt interruption event."); 5977 } 5978 5979 if (stop_state == lldb::eStateStopped) 5980 { 5981 // Between the time we initiated the Halt and the time we delivered it, the process could have 5982 // already finished its job. Check that here: 5983 5984 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 5985 { 5986 if (log) 5987 log->PutCString ("Process::RunThreadPlan(): Even though we timed out, the call plan was done. " 5988 "Exiting wait loop."); 5989 return_value = eExpressionCompleted; 5990 back_to_top = false; 5991 break; 5992 } 5993 5994 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5995 { 5996 if (log) 5997 log->PutCString ("Process::RunThreadPlan(): Went to halt but got a restarted event, there must be an un-restarted stopped event so try again... " 5998 "Exiting wait loop."); 5999 try_halt_again++; 6000 do_halt = false; 6001 continue; 6002 } 6003 6004 if (!options.GetTryAllThreads()) 6005 { 6006 if (log) 6007 log->PutCString ("Process::RunThreadPlan(): try_all_threads was false, we stopped so now we're quitting."); 6008 return_value = eExpressionInterrupted; 6009 back_to_top = false; 6010 break; 6011 } 6012 6013 if (before_first_timeout) 6014 { 6015 // Set all the other threads to run, and return to the top of the loop, which will continue; 6016 before_first_timeout = false; 6017 thread_plan_sp->SetStopOthers (false); 6018 if (log) 6019 log->PutCString ("Process::RunThreadPlan(): about to resume."); 6020 6021 back_to_top = true; 6022 break; 6023 } 6024 else 6025 { 6026 // Running all threads failed, so return Interrupted. 6027 if (log) 6028 log->PutCString("Process::RunThreadPlan(): running all threads timed out."); 6029 return_value = eExpressionInterrupted; 6030 back_to_top = false; 6031 break; 6032 } 6033 } 6034 } 6035 else 6036 { if (log) 6037 log->PutCString("Process::RunThreadPlan(): halt said it succeeded, but I got no event. " 6038 "I'm getting out of here passing Interrupted."); 6039 return_value = eExpressionInterrupted; 6040 back_to_top = false; 6041 break; 6042 } 6043 } 6044 else 6045 { 6046 try_halt_again++; 6047 continue; 6048 } 6049 } 6050 6051 if (!back_to_top || try_halt_again > num_retries) 6052 break; 6053 else 6054 continue; 6055 } 6056 } // END WAIT LOOP 6057 6058 // If we had to start up a temporary private state thread to run this thread plan, shut it down now. 6059 if (backup_private_state_thread.IsJoinable()) 6060 { 6061 StopPrivateStateThread(); 6062 Error error; 6063 m_private_state_thread = backup_private_state_thread; 6064 if (stopper_base_plan_sp) 6065 { 6066 thread->DiscardThreadPlansUpToPlan(stopper_base_plan_sp); 6067 } 6068 if (old_state != eStateInvalid) 6069 m_public_state.SetValueNoLock(old_state); 6070 } 6071 6072 // Restore the thread state if we are going to discard the plan execution. There are three cases where this 6073 // could happen: 6074 // 1) The execution successfully completed 6075 // 2) We hit a breakpoint, and ignore_breakpoints was true 6076 // 3) We got some other error, and discard_on_error was true 6077 bool should_unwind = (return_value == eExpressionInterrupted && options.DoesUnwindOnError()) 6078 || (return_value == eExpressionHitBreakpoint && options.DoesIgnoreBreakpoints()); 6079 6080 if (return_value == eExpressionCompleted 6081 || should_unwind) 6082 { 6083 thread_plan_sp->RestoreThreadState(); 6084 } 6085 6086 // Now do some processing on the results of the run: 6087 if (return_value == eExpressionInterrupted || return_value == eExpressionHitBreakpoint) 6088 { 6089 if (log) 6090 { 6091 StreamString s; 6092 if (event_sp) 6093 event_sp->Dump (&s); 6094 else 6095 { 6096 log->PutCString ("Process::RunThreadPlan(): Stop event that interrupted us is NULL."); 6097 } 6098 6099 StreamString ts; 6100 6101 const char *event_explanation = NULL; 6102 6103 do 6104 { 6105 if (!event_sp) 6106 { 6107 event_explanation = "<no event>"; 6108 break; 6109 } 6110 else if (event_sp->GetType() == eBroadcastBitInterrupt) 6111 { 6112 event_explanation = "<user interrupt>"; 6113 break; 6114 } 6115 else 6116 { 6117 const Process::ProcessEventData *event_data = Process::ProcessEventData::GetEventDataFromEvent (event_sp.get()); 6118 6119 if (!event_data) 6120 { 6121 event_explanation = "<no event data>"; 6122 break; 6123 } 6124 6125 Process *process = event_data->GetProcessSP().get(); 6126 6127 if (!process) 6128 { 6129 event_explanation = "<no process>"; 6130 break; 6131 } 6132 6133 ThreadList &thread_list = process->GetThreadList(); 6134 6135 uint32_t num_threads = thread_list.GetSize(); 6136 uint32_t thread_index; 6137 6138 ts.Printf("<%u threads> ", num_threads); 6139 6140 for (thread_index = 0; 6141 thread_index < num_threads; 6142 ++thread_index) 6143 { 6144 Thread *thread = thread_list.GetThreadAtIndex(thread_index).get(); 6145 6146 if (!thread) 6147 { 6148 ts.Printf("<?> "); 6149 continue; 6150 } 6151 6152 ts.Printf("<0x%4.4" PRIx64 " ", thread->GetID()); 6153 RegisterContext *register_context = thread->GetRegisterContext().get(); 6154 6155 if (register_context) 6156 ts.Printf("[ip 0x%" PRIx64 "] ", register_context->GetPC()); 6157 else 6158 ts.Printf("[ip unknown] "); 6159 6160 lldb::StopInfoSP stop_info_sp = thread->GetStopInfo(); 6161 if (stop_info_sp) 6162 { 6163 const char *stop_desc = stop_info_sp->GetDescription(); 6164 if (stop_desc) 6165 ts.PutCString (stop_desc); 6166 } 6167 ts.Printf(">"); 6168 } 6169 6170 event_explanation = ts.GetData(); 6171 } 6172 } while (0); 6173 6174 if (event_explanation) 6175 log->Printf("Process::RunThreadPlan(): execution interrupted: %s %s", s.GetData(), event_explanation); 6176 else 6177 log->Printf("Process::RunThreadPlan(): execution interrupted: %s", s.GetData()); 6178 } 6179 6180 if (should_unwind) 6181 { 6182 if (log) 6183 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - discarding thread plans up to %p.", 6184 static_cast<void*>(thread_plan_sp.get())); 6185 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6186 thread_plan_sp->SetPrivate (orig_plan_private); 6187 } 6188 else 6189 { 6190 if (log) 6191 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - for plan: %p not discarding.", 6192 static_cast<void*>(thread_plan_sp.get())); 6193 } 6194 } 6195 else if (return_value == eExpressionSetupError) 6196 { 6197 if (log) 6198 log->PutCString("Process::RunThreadPlan(): execution set up error."); 6199 6200 if (options.DoesUnwindOnError()) 6201 { 6202 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6203 thread_plan_sp->SetPrivate (orig_plan_private); 6204 } 6205 } 6206 else 6207 { 6208 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 6209 { 6210 if (log) 6211 log->PutCString("Process::RunThreadPlan(): thread plan is done"); 6212 return_value = eExpressionCompleted; 6213 } 6214 else if (thread->WasThreadPlanDiscarded (thread_plan_sp.get())) 6215 { 6216 if (log) 6217 log->PutCString("Process::RunThreadPlan(): thread plan was discarded"); 6218 return_value = eExpressionDiscarded; 6219 } 6220 else 6221 { 6222 if (log) 6223 log->PutCString("Process::RunThreadPlan(): thread plan stopped in mid course"); 6224 if (options.DoesUnwindOnError() && thread_plan_sp) 6225 { 6226 if (log) 6227 log->PutCString("Process::RunThreadPlan(): discarding thread plan 'cause unwind_on_error is set."); 6228 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6229 thread_plan_sp->SetPrivate (orig_plan_private); 6230 } 6231 } 6232 } 6233 6234 // Thread we ran the function in may have gone away because we ran the target 6235 // Check that it's still there, and if it is put it back in the context. Also restore the 6236 // frame in the context if it is still present. 6237 thread = GetThreadList().FindThreadByIndexID(thread_idx_id, true).get(); 6238 if (thread) 6239 { 6240 exe_ctx.SetFrameSP (thread->GetFrameWithStackID (ctx_frame_id)); 6241 } 6242 6243 // Also restore the current process'es selected frame & thread, since this function calling may 6244 // be done behind the user's back. 6245 6246 if (selected_tid != LLDB_INVALID_THREAD_ID) 6247 { 6248 if (GetThreadList().SetSelectedThreadByIndexID (selected_tid) && selected_stack_id.IsValid()) 6249 { 6250 // We were able to restore the selected thread, now restore the frame: 6251 Mutex::Locker lock(GetThreadList().GetMutex()); 6252 StackFrameSP old_frame_sp = GetThreadList().GetSelectedThread()->GetFrameWithStackID(selected_stack_id); 6253 if (old_frame_sp) 6254 GetThreadList().GetSelectedThread()->SetSelectedFrame(old_frame_sp.get()); 6255 } 6256 } 6257 } 6258 6259 // If the process exited during the run of the thread plan, notify everyone. 6260 6261 if (event_to_broadcast_sp) 6262 { 6263 if (log) 6264 log->PutCString("Process::RunThreadPlan(): rebroadcasting event."); 6265 BroadcastEvent(event_to_broadcast_sp); 6266 } 6267 6268 return return_value; 6269 } 6270 6271 const char * 6272 Process::ExecutionResultAsCString (ExpressionResults result) 6273 { 6274 const char *result_name; 6275 6276 switch (result) 6277 { 6278 case eExpressionCompleted: 6279 result_name = "eExpressionCompleted"; 6280 break; 6281 case eExpressionDiscarded: 6282 result_name = "eExpressionDiscarded"; 6283 break; 6284 case eExpressionInterrupted: 6285 result_name = "eExpressionInterrupted"; 6286 break; 6287 case eExpressionHitBreakpoint: 6288 result_name = "eExpressionHitBreakpoint"; 6289 break; 6290 case eExpressionSetupError: 6291 result_name = "eExpressionSetupError"; 6292 break; 6293 case eExpressionParseError: 6294 result_name = "eExpressionParseError"; 6295 break; 6296 case eExpressionResultUnavailable: 6297 result_name = "eExpressionResultUnavailable"; 6298 break; 6299 case eExpressionTimedOut: 6300 result_name = "eExpressionTimedOut"; 6301 break; 6302 case eExpressionStoppedForDebug: 6303 result_name = "eExpressionStoppedForDebug"; 6304 break; 6305 } 6306 return result_name; 6307 } 6308 6309 void 6310 Process::GetStatus (Stream &strm) 6311 { 6312 const StateType state = GetState(); 6313 if (StateIsStoppedState(state, false)) 6314 { 6315 if (state == eStateExited) 6316 { 6317 int exit_status = GetExitStatus(); 6318 const char *exit_description = GetExitDescription(); 6319 strm.Printf ("Process %" PRIu64 " exited with status = %i (0x%8.8x) %s\n", 6320 GetID(), 6321 exit_status, 6322 exit_status, 6323 exit_description ? exit_description : ""); 6324 } 6325 else 6326 { 6327 if (state == eStateConnected) 6328 strm.Printf ("Connected to remote target.\n"); 6329 else 6330 strm.Printf ("Process %" PRIu64 " %s\n", GetID(), StateAsCString (state)); 6331 } 6332 } 6333 else 6334 { 6335 strm.Printf ("Process %" PRIu64 " is running.\n", GetID()); 6336 } 6337 } 6338 6339 size_t 6340 Process::GetThreadStatus (Stream &strm, 6341 bool only_threads_with_stop_reason, 6342 uint32_t start_frame, 6343 uint32_t num_frames, 6344 uint32_t num_frames_with_source) 6345 { 6346 size_t num_thread_infos_dumped = 0; 6347 6348 // You can't hold the thread list lock while calling Thread::GetStatus. That very well might run code (e.g. if we need it 6349 // to get return values or arguments.) For that to work the process has to be able to acquire it. So instead copy the thread 6350 // ID's, and look them up one by one: 6351 6352 uint32_t num_threads; 6353 std::vector<lldb::tid_t> thread_id_array; 6354 //Scope for thread list locker; 6355 { 6356 Mutex::Locker locker (GetThreadList().GetMutex()); 6357 ThreadList &curr_thread_list = GetThreadList(); 6358 num_threads = curr_thread_list.GetSize(); 6359 uint32_t idx; 6360 thread_id_array.resize(num_threads); 6361 for (idx = 0; idx < num_threads; ++idx) 6362 thread_id_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetID(); 6363 } 6364 6365 for (uint32_t i = 0; i < num_threads; i++) 6366 { 6367 ThreadSP thread_sp(GetThreadList().FindThreadByID(thread_id_array[i])); 6368 if (thread_sp) 6369 { 6370 if (only_threads_with_stop_reason) 6371 { 6372 StopInfoSP stop_info_sp = thread_sp->GetStopInfo(); 6373 if (stop_info_sp.get() == NULL || !stop_info_sp->IsValid()) 6374 continue; 6375 } 6376 thread_sp->GetStatus (strm, 6377 start_frame, 6378 num_frames, 6379 num_frames_with_source); 6380 ++num_thread_infos_dumped; 6381 } 6382 else 6383 { 6384 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 6385 if (log) 6386 log->Printf("Process::GetThreadStatus - thread 0x" PRIu64 " vanished while running Thread::GetStatus."); 6387 6388 } 6389 } 6390 return num_thread_infos_dumped; 6391 } 6392 6393 void 6394 Process::AddInvalidMemoryRegion (const LoadRange ®ion) 6395 { 6396 m_memory_cache.AddInvalidRange(region.GetRangeBase(), region.GetByteSize()); 6397 } 6398 6399 bool 6400 Process::RemoveInvalidMemoryRange (const LoadRange ®ion) 6401 { 6402 return m_memory_cache.RemoveInvalidRange(region.GetRangeBase(), region.GetByteSize()); 6403 } 6404 6405 void 6406 Process::AddPreResumeAction (PreResumeActionCallback callback, void *baton) 6407 { 6408 m_pre_resume_actions.push_back(PreResumeCallbackAndBaton (callback, baton)); 6409 } 6410 6411 bool 6412 Process::RunPreResumeActions () 6413 { 6414 bool result = true; 6415 while (!m_pre_resume_actions.empty()) 6416 { 6417 struct PreResumeCallbackAndBaton action = m_pre_resume_actions.back(); 6418 m_pre_resume_actions.pop_back(); 6419 bool this_result = action.callback (action.baton); 6420 if (result == true) 6421 result = this_result; 6422 } 6423 return result; 6424 } 6425 6426 void 6427 Process::ClearPreResumeActions () 6428 { 6429 m_pre_resume_actions.clear(); 6430 } 6431 6432 ProcessRunLock & 6433 Process::GetRunLock() 6434 { 6435 if (m_private_state_thread.EqualsThread(Host::GetCurrentThread())) 6436 return m_private_run_lock; 6437 else 6438 return m_public_run_lock; 6439 } 6440 6441 void 6442 Process::Flush () 6443 { 6444 m_thread_list.Flush(); 6445 m_extended_thread_list.Flush(); 6446 m_extended_thread_stop_id = 0; 6447 m_queue_list.Clear(); 6448 m_queue_list_stop_id = 0; 6449 } 6450 6451 void 6452 Process::DidExec () 6453 { 6454 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 6455 if (log) 6456 log->Printf ("Process::%s()", __FUNCTION__); 6457 6458 Target &target = GetTarget(); 6459 target.CleanupProcess (); 6460 target.ClearModules(false); 6461 m_dynamic_checkers_ap.reset(); 6462 m_abi_sp.reset(); 6463 m_system_runtime_ap.reset(); 6464 m_os_ap.reset(); 6465 m_dyld_ap.reset(); 6466 m_jit_loaders_ap.reset(); 6467 m_image_tokens.clear(); 6468 m_allocated_memory_cache.Clear(); 6469 m_language_runtimes.clear(); 6470 m_instrumentation_runtimes.clear(); 6471 m_thread_list.DiscardThreadPlans(); 6472 m_memory_cache.Clear(true); 6473 m_stop_info_override_callback = NULL; 6474 DoDidExec(); 6475 CompleteAttach (); 6476 // Flush the process (threads and all stack frames) after running CompleteAttach() 6477 // in case the dynamic loader loaded things in new locations. 6478 Flush(); 6479 6480 // After we figure out what was loaded/unloaded in CompleteAttach, 6481 // we need to let the target know so it can do any cleanup it needs to. 6482 target.DidExec(); 6483 } 6484 6485 addr_t 6486 Process::ResolveIndirectFunction(const Address *address, Error &error) 6487 { 6488 if (address == nullptr) 6489 { 6490 error.SetErrorString("Invalid address argument"); 6491 return LLDB_INVALID_ADDRESS; 6492 } 6493 6494 addr_t function_addr = LLDB_INVALID_ADDRESS; 6495 6496 addr_t addr = address->GetLoadAddress(&GetTarget()); 6497 std::map<addr_t,addr_t>::const_iterator iter = m_resolved_indirect_addresses.find(addr); 6498 if (iter != m_resolved_indirect_addresses.end()) 6499 { 6500 function_addr = (*iter).second; 6501 } 6502 else 6503 { 6504 if (!InferiorCall(this, address, function_addr)) 6505 { 6506 Symbol *symbol = address->CalculateSymbolContextSymbol(); 6507 error.SetErrorStringWithFormat ("Unable to call resolver for indirect function %s", 6508 symbol ? symbol->GetName().AsCString() : "<UNKNOWN>"); 6509 function_addr = LLDB_INVALID_ADDRESS; 6510 } 6511 else 6512 { 6513 m_resolved_indirect_addresses.insert(std::pair<addr_t, addr_t>(addr, function_addr)); 6514 } 6515 } 6516 return function_addr; 6517 } 6518 6519 void 6520 Process::ModulesDidLoad (ModuleList &module_list) 6521 { 6522 SystemRuntime *sys_runtime = GetSystemRuntime(); 6523 if (sys_runtime) 6524 { 6525 sys_runtime->ModulesDidLoad (module_list); 6526 } 6527 6528 GetJITLoaders().ModulesDidLoad (module_list); 6529 6530 // Give runtimes a chance to be created. 6531 InstrumentationRuntime::ModulesDidLoad(module_list, this, m_instrumentation_runtimes); 6532 6533 // Tell runtimes about new modules. 6534 for (auto pos = m_instrumentation_runtimes.begin(); pos != m_instrumentation_runtimes.end(); ++pos) 6535 { 6536 InstrumentationRuntimeSP runtime = pos->second; 6537 runtime->ModulesDidLoad(module_list); 6538 } 6539 6540 // Let any language runtimes we have already created know 6541 // about the modules that loaded. 6542 6543 // Iterate over a copy of this language runtime list in case 6544 // the language runtime ModulesDidLoad somehow causes the language 6545 // riuntime to be unloaded. 6546 LanguageRuntimeCollection language_runtimes(m_language_runtimes); 6547 for (const auto &pair: language_runtimes) 6548 { 6549 // We must check language_runtime_sp to make sure it is not 6550 // NULL as we might cache the fact that we didn't have a 6551 // language runtime for a language. 6552 LanguageRuntimeSP language_runtime_sp = pair.second; 6553 if (language_runtime_sp) 6554 language_runtime_sp->ModulesDidLoad(module_list); 6555 } 6556 6557 LoadOperatingSystemPlugin(false); 6558 } 6559 6560 void 6561 Process::PrintWarning (uint64_t warning_type, void *repeat_key, const char *fmt, ...) 6562 { 6563 bool print_warning = true; 6564 6565 StreamSP stream_sp = GetTarget().GetDebugger().GetAsyncOutputStream(); 6566 if (stream_sp.get() == nullptr) 6567 return; 6568 if (warning_type == eWarningsOptimization 6569 && GetWarningsOptimization() == false) 6570 { 6571 return; 6572 } 6573 6574 if (repeat_key != nullptr) 6575 { 6576 WarningsCollection::iterator it = m_warnings_issued.find (warning_type); 6577 if (it == m_warnings_issued.end()) 6578 { 6579 m_warnings_issued[warning_type] = WarningsPointerSet(); 6580 m_warnings_issued[warning_type].insert (repeat_key); 6581 } 6582 else 6583 { 6584 if (it->second.find (repeat_key) != it->second.end()) 6585 { 6586 print_warning = false; 6587 } 6588 else 6589 { 6590 it->second.insert (repeat_key); 6591 } 6592 } 6593 } 6594 6595 if (print_warning) 6596 { 6597 va_list args; 6598 va_start (args, fmt); 6599 stream_sp->PrintfVarArg (fmt, args); 6600 va_end (args); 6601 } 6602 } 6603 6604 void 6605 Process::PrintWarningOptimization (const SymbolContext &sc) 6606 { 6607 if (GetWarningsOptimization() == true 6608 && sc.module_sp.get() 6609 && sc.module_sp->GetFileSpec().GetFilename().IsEmpty() == false 6610 && sc.function 6611 && sc.function->GetIsOptimized() == true) 6612 { 6613 PrintWarning (Process::Warnings::eWarningsOptimization, sc.module_sp.get(), "%s was compiled with optimization - stepping may behave oddly; variables may not be available.\n", sc.module_sp->GetFileSpec().GetFilename().GetCString()); 6614 } 6615 } 6616 6617 ThreadCollectionSP 6618 Process::GetHistoryThreads(lldb::addr_t addr) 6619 { 6620 ThreadCollectionSP threads; 6621 6622 const MemoryHistorySP &memory_history = MemoryHistory::FindPlugin(shared_from_this()); 6623 6624 if (! memory_history.get()) { 6625 return threads; 6626 } 6627 6628 threads.reset(new ThreadCollection(memory_history->GetHistoryThreads(addr))); 6629 6630 return threads; 6631 } 6632 6633 InstrumentationRuntimeSP 6634 Process::GetInstrumentationRuntime(lldb::InstrumentationRuntimeType type) 6635 { 6636 InstrumentationRuntimeCollection::iterator pos; 6637 pos = m_instrumentation_runtimes.find (type); 6638 if (pos == m_instrumentation_runtimes.end()) 6639 { 6640 return InstrumentationRuntimeSP(); 6641 } 6642 else 6643 return (*pos).second; 6644 } 6645 6646 bool 6647 Process::GetModuleSpec(const FileSpec& module_file_spec, 6648 const ArchSpec& arch, 6649 ModuleSpec& module_spec) 6650 { 6651 module_spec.Clear(); 6652 return false; 6653 } 6654