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/ClangUserExpression.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 1921 StreamString expr; 1922 expr.Printf(R"( 1923 struct __lldb_dlopen_result { void *image_ptr; const char *error_str; } the_result; 1924 the_result.image_ptr = dlopen ("%s", 2); 1925 if (the_result.image_ptr == (void *) 0x0) 1926 { 1927 the_result.error_str = dlerror(); 1928 } 1929 else 1930 { 1931 the_result.error_str = (const char *) 0x0; 1932 } 1933 the_result; 1934 )", 1935 path); 1936 const char *prefix = R"( 1937 extern "C" void* dlopen (const char *path, int mode); 1938 extern "C" const char *dlerror (void); 1939 )"; 1940 lldb::ValueObjectSP result_valobj_sp; 1941 Error expr_error; 1942 ClangUserExpression::Evaluate (exe_ctx, 1943 expr_options, 1944 expr.GetData(), 1945 prefix, 1946 result_valobj_sp, 1947 expr_error); 1948 if (expr_error.Success()) 1949 { 1950 error = result_valobj_sp->GetError(); 1951 if (error.Success()) 1952 { 1953 Scalar scalar; 1954 ValueObjectSP image_ptr_sp = result_valobj_sp->GetChildAtIndex(0, true); 1955 if (image_ptr_sp && image_ptr_sp->ResolveValue (scalar)) 1956 { 1957 addr_t image_ptr = scalar.ULongLong(LLDB_INVALID_ADDRESS); 1958 if (image_ptr != 0 && image_ptr != LLDB_INVALID_ADDRESS) 1959 { 1960 uint32_t image_token = m_image_tokens.size(); 1961 m_image_tokens.push_back (image_ptr); 1962 return image_token; 1963 } 1964 else if (image_ptr == 0) 1965 { 1966 ValueObjectSP error_str_sp = result_valobj_sp->GetChildAtIndex(1, true); 1967 if (error_str_sp) 1968 { 1969 if (error_str_sp->IsCStringContainer(true)) 1970 { 1971 DataBufferSP buffer_sp(new DataBufferHeap(10240,0)); 1972 size_t num_chars = error_str_sp->ReadPointedString (buffer_sp, error, 10240); 1973 if (error.Success() && num_chars > 0) 1974 { 1975 error.Clear(); 1976 error.SetErrorStringWithFormat("dlopen error: %s", buffer_sp->GetBytes()); 1977 } 1978 else 1979 { 1980 error.Clear(); 1981 error.SetErrorStringWithFormat("dlopen failed for unknown reasons."); 1982 } 1983 } 1984 } 1985 } 1986 } 1987 } 1988 } 1989 else 1990 error = expr_error; 1991 } 1992 } 1993 } 1994 if (!error.AsCString()) 1995 error.SetErrorStringWithFormat("unable to load '%s'", path); 1996 return LLDB_INVALID_IMAGE_TOKEN; 1997 } 1998 1999 //---------------------------------------------------------------------- 2000 // UnloadImage 2001 // 2002 // This function provides a default implementation that works for most 2003 // unix variants. Any Process subclasses that need to do shared library 2004 // loading differently should override LoadImage and UnloadImage and 2005 // do what is needed. 2006 //---------------------------------------------------------------------- 2007 Error 2008 Process::UnloadImage (uint32_t image_token) 2009 { 2010 Error error; 2011 2012 if (m_finalizing) 2013 { 2014 error.SetErrorString("process is tearing itself down"); 2015 return error; 2016 } 2017 2018 if (image_token < m_image_tokens.size()) 2019 { 2020 const addr_t image_addr = m_image_tokens[image_token]; 2021 if (image_addr == LLDB_INVALID_ADDRESS) 2022 { 2023 error.SetErrorString("image already unloaded"); 2024 } 2025 else 2026 { 2027 DynamicLoader *loader = GetDynamicLoader(); 2028 if (loader) 2029 error = loader->CanLoadImage(); 2030 2031 if (error.Success()) 2032 { 2033 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 2034 2035 if (thread_sp) 2036 { 2037 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 2038 2039 if (frame_sp) 2040 { 2041 ExecutionContext exe_ctx; 2042 frame_sp->CalculateExecutionContext (exe_ctx); 2043 EvaluateExpressionOptions expr_options; 2044 expr_options.SetUnwindOnError(true); 2045 expr_options.SetIgnoreBreakpoints(true); 2046 expr_options.SetExecutionPolicy(eExecutionPolicyAlways); 2047 StreamString expr; 2048 expr.Printf("dlclose ((void *)0x%" PRIx64 ")", image_addr); 2049 const char *prefix = "extern \"C\" int dlclose(void* handle);\n"; 2050 lldb::ValueObjectSP result_valobj_sp; 2051 Error expr_error; 2052 ClangUserExpression::Evaluate (exe_ctx, 2053 expr_options, 2054 expr.GetData(), 2055 prefix, 2056 result_valobj_sp, 2057 expr_error); 2058 if (result_valobj_sp->GetError().Success()) 2059 { 2060 Scalar scalar; 2061 if (result_valobj_sp->ResolveValue (scalar)) 2062 { 2063 if (scalar.UInt(1)) 2064 { 2065 error.SetErrorStringWithFormat("expression failed: \"%s\"", expr.GetData()); 2066 } 2067 else 2068 { 2069 m_image_tokens[image_token] = LLDB_INVALID_ADDRESS; 2070 } 2071 } 2072 } 2073 else 2074 { 2075 error = result_valobj_sp->GetError(); 2076 } 2077 } 2078 } 2079 } 2080 } 2081 } 2082 else 2083 { 2084 error.SetErrorString("invalid image token"); 2085 } 2086 return error; 2087 } 2088 2089 const lldb::ABISP & 2090 Process::GetABI() 2091 { 2092 if (!m_abi_sp) 2093 m_abi_sp = ABI::FindPlugin(GetTarget().GetArchitecture()); 2094 return m_abi_sp; 2095 } 2096 2097 LanguageRuntime * 2098 Process::GetLanguageRuntime(lldb::LanguageType language, bool retry_if_null) 2099 { 2100 if (m_finalizing) 2101 return nullptr; 2102 2103 LanguageRuntimeCollection::iterator pos; 2104 pos = m_language_runtimes.find (language); 2105 if (pos == m_language_runtimes.end() || (retry_if_null && !(*pos).second)) 2106 { 2107 lldb::LanguageRuntimeSP runtime_sp(LanguageRuntime::FindPlugin(this, language)); 2108 2109 m_language_runtimes[language] = runtime_sp; 2110 return runtime_sp.get(); 2111 } 2112 else 2113 return (*pos).second.get(); 2114 } 2115 2116 CPPLanguageRuntime * 2117 Process::GetCPPLanguageRuntime (bool retry_if_null) 2118 { 2119 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeC_plus_plus, retry_if_null); 2120 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeC_plus_plus) 2121 return static_cast<CPPLanguageRuntime *> (runtime); 2122 return NULL; 2123 } 2124 2125 ObjCLanguageRuntime * 2126 Process::GetObjCLanguageRuntime (bool retry_if_null) 2127 { 2128 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeObjC, retry_if_null); 2129 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeObjC) 2130 return static_cast<ObjCLanguageRuntime *> (runtime); 2131 return NULL; 2132 } 2133 2134 bool 2135 Process::IsPossibleDynamicValue (ValueObject& in_value) 2136 { 2137 if (m_finalizing) 2138 return false; 2139 2140 if (in_value.IsDynamic()) 2141 return false; 2142 LanguageType known_type = in_value.GetObjectRuntimeLanguage(); 2143 2144 if (known_type != eLanguageTypeUnknown && known_type != eLanguageTypeC) 2145 { 2146 LanguageRuntime *runtime = GetLanguageRuntime (known_type); 2147 return runtime ? runtime->CouldHaveDynamicValue(in_value) : false; 2148 } 2149 2150 LanguageRuntime *cpp_runtime = GetLanguageRuntime (eLanguageTypeC_plus_plus); 2151 if (cpp_runtime && cpp_runtime->CouldHaveDynamicValue(in_value)) 2152 return true; 2153 2154 LanguageRuntime *objc_runtime = GetLanguageRuntime (eLanguageTypeObjC); 2155 return objc_runtime ? objc_runtime->CouldHaveDynamicValue(in_value) : false; 2156 } 2157 2158 void 2159 Process::SetDynamicCheckers(DynamicCheckerFunctions *dynamic_checkers) 2160 { 2161 m_dynamic_checkers_ap.reset(dynamic_checkers); 2162 } 2163 2164 BreakpointSiteList & 2165 Process::GetBreakpointSiteList() 2166 { 2167 return m_breakpoint_site_list; 2168 } 2169 2170 const BreakpointSiteList & 2171 Process::GetBreakpointSiteList() const 2172 { 2173 return m_breakpoint_site_list; 2174 } 2175 2176 2177 void 2178 Process::DisableAllBreakpointSites () 2179 { 2180 m_breakpoint_site_list.ForEach([this](BreakpointSite *bp_site) -> void { 2181 // bp_site->SetEnabled(true); 2182 DisableBreakpointSite(bp_site); 2183 }); 2184 } 2185 2186 Error 2187 Process::ClearBreakpointSiteByID (lldb::user_id_t break_id) 2188 { 2189 Error error (DisableBreakpointSiteByID (break_id)); 2190 2191 if (error.Success()) 2192 m_breakpoint_site_list.Remove(break_id); 2193 2194 return error; 2195 } 2196 2197 Error 2198 Process::DisableBreakpointSiteByID (lldb::user_id_t break_id) 2199 { 2200 Error error; 2201 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2202 if (bp_site_sp) 2203 { 2204 if (bp_site_sp->IsEnabled()) 2205 error = DisableBreakpointSite (bp_site_sp.get()); 2206 } 2207 else 2208 { 2209 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2210 } 2211 2212 return error; 2213 } 2214 2215 Error 2216 Process::EnableBreakpointSiteByID (lldb::user_id_t break_id) 2217 { 2218 Error error; 2219 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2220 if (bp_site_sp) 2221 { 2222 if (!bp_site_sp->IsEnabled()) 2223 error = EnableBreakpointSite (bp_site_sp.get()); 2224 } 2225 else 2226 { 2227 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2228 } 2229 return error; 2230 } 2231 2232 lldb::break_id_t 2233 Process::CreateBreakpointSite (const BreakpointLocationSP &owner, bool use_hardware) 2234 { 2235 addr_t load_addr = LLDB_INVALID_ADDRESS; 2236 2237 bool show_error = true; 2238 switch (GetState()) 2239 { 2240 case eStateInvalid: 2241 case eStateUnloaded: 2242 case eStateConnected: 2243 case eStateAttaching: 2244 case eStateLaunching: 2245 case eStateDetached: 2246 case eStateExited: 2247 show_error = false; 2248 break; 2249 2250 case eStateStopped: 2251 case eStateRunning: 2252 case eStateStepping: 2253 case eStateCrashed: 2254 case eStateSuspended: 2255 show_error = IsAlive(); 2256 break; 2257 } 2258 2259 // Reset the IsIndirect flag here, in case the location changes from 2260 // pointing to a indirect symbol to a regular symbol. 2261 owner->SetIsIndirect (false); 2262 2263 if (owner->ShouldResolveIndirectFunctions()) 2264 { 2265 Symbol *symbol = owner->GetAddress().CalculateSymbolContextSymbol(); 2266 if (symbol && symbol->IsIndirect()) 2267 { 2268 Error error; 2269 Address symbol_address = symbol->GetAddress(); 2270 load_addr = ResolveIndirectFunction (&symbol_address, error); 2271 if (!error.Success() && show_error) 2272 { 2273 GetTarget().GetDebugger().GetErrorFile()->Printf ("warning: failed to resolve indirect function at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2274 symbol->GetLoadAddress(&GetTarget()), 2275 owner->GetBreakpoint().GetID(), 2276 owner->GetID(), 2277 error.AsCString() ? error.AsCString() : "unknown error"); 2278 return LLDB_INVALID_BREAK_ID; 2279 } 2280 Address resolved_address(load_addr); 2281 load_addr = resolved_address.GetOpcodeLoadAddress (&GetTarget()); 2282 owner->SetIsIndirect(true); 2283 } 2284 else 2285 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&GetTarget()); 2286 } 2287 else 2288 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&GetTarget()); 2289 2290 if (load_addr != LLDB_INVALID_ADDRESS) 2291 { 2292 BreakpointSiteSP bp_site_sp; 2293 2294 // Look up this breakpoint site. If it exists, then add this new owner, otherwise 2295 // create a new breakpoint site and add it. 2296 2297 bp_site_sp = m_breakpoint_site_list.FindByAddress (load_addr); 2298 2299 if (bp_site_sp) 2300 { 2301 bp_site_sp->AddOwner (owner); 2302 owner->SetBreakpointSite (bp_site_sp); 2303 return bp_site_sp->GetID(); 2304 } 2305 else 2306 { 2307 bp_site_sp.reset (new BreakpointSite (&m_breakpoint_site_list, owner, load_addr, use_hardware)); 2308 if (bp_site_sp) 2309 { 2310 Error error = EnableBreakpointSite (bp_site_sp.get()); 2311 if (error.Success()) 2312 { 2313 owner->SetBreakpointSite (bp_site_sp); 2314 return m_breakpoint_site_list.Add (bp_site_sp); 2315 } 2316 else 2317 { 2318 if (show_error) 2319 { 2320 // Report error for setting breakpoint... 2321 GetTarget().GetDebugger().GetErrorFile()->Printf ("warning: failed to set breakpoint site at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2322 load_addr, 2323 owner->GetBreakpoint().GetID(), 2324 owner->GetID(), 2325 error.AsCString() ? error.AsCString() : "unknown error"); 2326 } 2327 } 2328 } 2329 } 2330 } 2331 // We failed to enable the breakpoint 2332 return LLDB_INVALID_BREAK_ID; 2333 2334 } 2335 2336 void 2337 Process::RemoveOwnerFromBreakpointSite (lldb::user_id_t owner_id, lldb::user_id_t owner_loc_id, BreakpointSiteSP &bp_site_sp) 2338 { 2339 uint32_t num_owners = bp_site_sp->RemoveOwner (owner_id, owner_loc_id); 2340 if (num_owners == 0) 2341 { 2342 // Don't try to disable the site if we don't have a live process anymore. 2343 if (IsAlive()) 2344 DisableBreakpointSite (bp_site_sp.get()); 2345 m_breakpoint_site_list.RemoveByAddress(bp_site_sp->GetLoadAddress()); 2346 } 2347 } 2348 2349 2350 size_t 2351 Process::RemoveBreakpointOpcodesFromBuffer (addr_t bp_addr, size_t size, uint8_t *buf) const 2352 { 2353 size_t bytes_removed = 0; 2354 BreakpointSiteList bp_sites_in_range; 2355 2356 if (m_breakpoint_site_list.FindInRange (bp_addr, bp_addr + size, bp_sites_in_range)) 2357 { 2358 bp_sites_in_range.ForEach([bp_addr, size, buf, &bytes_removed](BreakpointSite *bp_site) -> void { 2359 if (bp_site->GetType() == BreakpointSite::eSoftware) 2360 { 2361 addr_t intersect_addr; 2362 size_t intersect_size; 2363 size_t opcode_offset; 2364 if (bp_site->IntersectsRange(bp_addr, size, &intersect_addr, &intersect_size, &opcode_offset)) 2365 { 2366 assert(bp_addr <= intersect_addr && intersect_addr < bp_addr + size); 2367 assert(bp_addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= bp_addr + size); 2368 assert(opcode_offset + intersect_size <= bp_site->GetByteSize()); 2369 size_t buf_offset = intersect_addr - bp_addr; 2370 ::memcpy(buf + buf_offset, bp_site->GetSavedOpcodeBytes() + opcode_offset, intersect_size); 2371 } 2372 } 2373 }); 2374 } 2375 return bytes_removed; 2376 } 2377 2378 2379 2380 size_t 2381 Process::GetSoftwareBreakpointTrapOpcode (BreakpointSite* bp_site) 2382 { 2383 PlatformSP platform_sp (GetTarget().GetPlatform()); 2384 if (platform_sp) 2385 return platform_sp->GetSoftwareBreakpointTrapOpcode (GetTarget(), bp_site); 2386 return 0; 2387 } 2388 2389 Error 2390 Process::EnableSoftwareBreakpoint (BreakpointSite *bp_site) 2391 { 2392 Error error; 2393 assert (bp_site != NULL); 2394 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2395 const addr_t bp_addr = bp_site->GetLoadAddress(); 2396 if (log) 2397 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64, bp_site->GetID(), (uint64_t)bp_addr); 2398 if (bp_site->IsEnabled()) 2399 { 2400 if (log) 2401 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already enabled", bp_site->GetID(), (uint64_t)bp_addr); 2402 return error; 2403 } 2404 2405 if (bp_addr == LLDB_INVALID_ADDRESS) 2406 { 2407 error.SetErrorString("BreakpointSite contains an invalid load address."); 2408 return error; 2409 } 2410 // Ask the lldb::Process subclass to fill in the correct software breakpoint 2411 // trap for the breakpoint site 2412 const size_t bp_opcode_size = GetSoftwareBreakpointTrapOpcode(bp_site); 2413 2414 if (bp_opcode_size == 0) 2415 { 2416 error.SetErrorStringWithFormat ("Process::GetSoftwareBreakpointTrapOpcode() returned zero, unable to get breakpoint trap for address 0x%" PRIx64, bp_addr); 2417 } 2418 else 2419 { 2420 const uint8_t * const bp_opcode_bytes = bp_site->GetTrapOpcodeBytes(); 2421 2422 if (bp_opcode_bytes == NULL) 2423 { 2424 error.SetErrorString ("BreakpointSite doesn't contain a valid breakpoint trap opcode."); 2425 return error; 2426 } 2427 2428 // Save the original opcode by reading it 2429 if (DoReadMemory(bp_addr, bp_site->GetSavedOpcodeBytes(), bp_opcode_size, error) == bp_opcode_size) 2430 { 2431 // Write a software breakpoint in place of the original opcode 2432 if (DoWriteMemory(bp_addr, bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2433 { 2434 uint8_t verify_bp_opcode_bytes[64]; 2435 if (DoReadMemory(bp_addr, verify_bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2436 { 2437 if (::memcmp(bp_opcode_bytes, verify_bp_opcode_bytes, bp_opcode_size) == 0) 2438 { 2439 bp_site->SetEnabled(true); 2440 bp_site->SetType (BreakpointSite::eSoftware); 2441 if (log) 2442 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", 2443 bp_site->GetID(), 2444 (uint64_t)bp_addr); 2445 } 2446 else 2447 error.SetErrorString("failed to verify the breakpoint trap in memory."); 2448 } 2449 else 2450 error.SetErrorString("Unable to read memory to verify breakpoint trap."); 2451 } 2452 else 2453 error.SetErrorString("Unable to write breakpoint trap to memory."); 2454 } 2455 else 2456 error.SetErrorString("Unable to read memory at breakpoint address."); 2457 } 2458 if (log && error.Fail()) 2459 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2460 bp_site->GetID(), 2461 (uint64_t)bp_addr, 2462 error.AsCString()); 2463 return error; 2464 } 2465 2466 Error 2467 Process::DisableSoftwareBreakpoint (BreakpointSite *bp_site) 2468 { 2469 Error error; 2470 assert (bp_site != NULL); 2471 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2472 addr_t bp_addr = bp_site->GetLoadAddress(); 2473 lldb::user_id_t breakID = bp_site->GetID(); 2474 if (log) 2475 log->Printf ("Process::DisableSoftwareBreakpoint (breakID = %" PRIu64 ") addr = 0x%" PRIx64, breakID, (uint64_t)bp_addr); 2476 2477 if (bp_site->IsHardware()) 2478 { 2479 error.SetErrorString("Breakpoint site is a hardware breakpoint."); 2480 } 2481 else if (bp_site->IsEnabled()) 2482 { 2483 const size_t break_op_size = bp_site->GetByteSize(); 2484 const uint8_t * const break_op = bp_site->GetTrapOpcodeBytes(); 2485 if (break_op_size > 0) 2486 { 2487 // Clear a software breakpoint instruction 2488 uint8_t curr_break_op[8]; 2489 assert (break_op_size <= sizeof(curr_break_op)); 2490 bool break_op_found = false; 2491 2492 // Read the breakpoint opcode 2493 if (DoReadMemory (bp_addr, curr_break_op, break_op_size, error) == break_op_size) 2494 { 2495 bool verify = false; 2496 // Make sure the breakpoint opcode exists at this address 2497 if (::memcmp (curr_break_op, break_op, break_op_size) == 0) 2498 { 2499 break_op_found = true; 2500 // We found a valid breakpoint opcode at this address, now restore 2501 // the saved opcode. 2502 if (DoWriteMemory (bp_addr, bp_site->GetSavedOpcodeBytes(), break_op_size, error) == break_op_size) 2503 { 2504 verify = true; 2505 } 2506 else 2507 error.SetErrorString("Memory write failed when restoring original opcode."); 2508 } 2509 else 2510 { 2511 error.SetErrorString("Original breakpoint trap is no longer in memory."); 2512 // Set verify to true and so we can check if the original opcode has already been restored 2513 verify = true; 2514 } 2515 2516 if (verify) 2517 { 2518 uint8_t verify_opcode[8]; 2519 assert (break_op_size < sizeof(verify_opcode)); 2520 // Verify that our original opcode made it back to the inferior 2521 if (DoReadMemory (bp_addr, verify_opcode, break_op_size, error) == break_op_size) 2522 { 2523 // compare the memory we just read with the original opcode 2524 if (::memcmp (bp_site->GetSavedOpcodeBytes(), verify_opcode, break_op_size) == 0) 2525 { 2526 // SUCCESS 2527 bp_site->SetEnabled(false); 2528 if (log) 2529 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", bp_site->GetID(), (uint64_t)bp_addr); 2530 return error; 2531 } 2532 else 2533 { 2534 if (break_op_found) 2535 error.SetErrorString("Failed to restore original opcode."); 2536 } 2537 } 2538 else 2539 error.SetErrorString("Failed to read memory to verify that breakpoint trap was restored."); 2540 } 2541 } 2542 else 2543 error.SetErrorString("Unable to read memory that should contain the breakpoint trap."); 2544 } 2545 } 2546 else 2547 { 2548 if (log) 2549 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already disabled", bp_site->GetID(), (uint64_t)bp_addr); 2550 return error; 2551 } 2552 2553 if (log) 2554 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2555 bp_site->GetID(), 2556 (uint64_t)bp_addr, 2557 error.AsCString()); 2558 return error; 2559 2560 } 2561 2562 // Uncomment to verify memory caching works after making changes to caching code 2563 //#define VERIFY_MEMORY_READS 2564 2565 size_t 2566 Process::ReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2567 { 2568 error.Clear(); 2569 if (!GetDisableMemoryCache()) 2570 { 2571 #if defined (VERIFY_MEMORY_READS) 2572 // Memory caching is enabled, with debug verification 2573 2574 if (buf && size) 2575 { 2576 // Uncomment the line below to make sure memory caching is working. 2577 // I ran this through the test suite and got no assertions, so I am 2578 // pretty confident this is working well. If any changes are made to 2579 // memory caching, uncomment the line below and test your changes! 2580 2581 // Verify all memory reads by using the cache first, then redundantly 2582 // reading the same memory from the inferior and comparing to make sure 2583 // everything is exactly the same. 2584 std::string verify_buf (size, '\0'); 2585 assert (verify_buf.size() == size); 2586 const size_t cache_bytes_read = m_memory_cache.Read (this, addr, buf, size, error); 2587 Error verify_error; 2588 const size_t verify_bytes_read = ReadMemoryFromInferior (addr, const_cast<char *>(verify_buf.data()), verify_buf.size(), verify_error); 2589 assert (cache_bytes_read == verify_bytes_read); 2590 assert (memcmp(buf, verify_buf.data(), verify_buf.size()) == 0); 2591 assert (verify_error.Success() == error.Success()); 2592 return cache_bytes_read; 2593 } 2594 return 0; 2595 #else // !defined(VERIFY_MEMORY_READS) 2596 // Memory caching is enabled, without debug verification 2597 2598 return m_memory_cache.Read (addr, buf, size, error); 2599 #endif // defined (VERIFY_MEMORY_READS) 2600 } 2601 else 2602 { 2603 // Memory caching is disabled 2604 2605 return ReadMemoryFromInferior (addr, buf, size, error); 2606 } 2607 } 2608 2609 size_t 2610 Process::ReadCStringFromMemory (addr_t addr, std::string &out_str, Error &error) 2611 { 2612 char buf[256]; 2613 out_str.clear(); 2614 addr_t curr_addr = addr; 2615 while (1) 2616 { 2617 size_t length = ReadCStringFromMemory (curr_addr, buf, sizeof(buf), error); 2618 if (length == 0) 2619 break; 2620 out_str.append(buf, length); 2621 // If we got "length - 1" bytes, we didn't get the whole C string, we 2622 // need to read some more characters 2623 if (length == sizeof(buf) - 1) 2624 curr_addr += length; 2625 else 2626 break; 2627 } 2628 return out_str.size(); 2629 } 2630 2631 2632 size_t 2633 Process::ReadStringFromMemory (addr_t addr, char *dst, size_t max_bytes, Error &error, 2634 size_t type_width) 2635 { 2636 size_t total_bytes_read = 0; 2637 if (dst && max_bytes && type_width && max_bytes >= type_width) 2638 { 2639 // Ensure a null terminator independent of the number of bytes that is read. 2640 memset (dst, 0, max_bytes); 2641 size_t bytes_left = max_bytes - type_width; 2642 2643 const char terminator[4] = {'\0', '\0', '\0', '\0'}; 2644 assert(sizeof(terminator) >= type_width && 2645 "Attempting to validate a string with more than 4 bytes per character!"); 2646 2647 addr_t curr_addr = addr; 2648 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2649 char *curr_dst = dst; 2650 2651 error.Clear(); 2652 while (bytes_left > 0 && error.Success()) 2653 { 2654 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2655 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2656 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2657 2658 if (bytes_read == 0) 2659 break; 2660 2661 // Search for a null terminator of correct size and alignment in bytes_read 2662 size_t aligned_start = total_bytes_read - total_bytes_read % type_width; 2663 for (size_t i = aligned_start; i + type_width <= total_bytes_read + bytes_read; i += type_width) 2664 if (::strncmp(&dst[i], terminator, type_width) == 0) 2665 { 2666 error.Clear(); 2667 return i; 2668 } 2669 2670 total_bytes_read += bytes_read; 2671 curr_dst += bytes_read; 2672 curr_addr += bytes_read; 2673 bytes_left -= bytes_read; 2674 } 2675 } 2676 else 2677 { 2678 if (max_bytes) 2679 error.SetErrorString("invalid arguments"); 2680 } 2681 return total_bytes_read; 2682 } 2683 2684 // Deprecated in favor of ReadStringFromMemory which has wchar support and correct code to find 2685 // null terminators. 2686 size_t 2687 Process::ReadCStringFromMemory (addr_t addr, char *dst, size_t dst_max_len, Error &result_error) 2688 { 2689 size_t total_cstr_len = 0; 2690 if (dst && dst_max_len) 2691 { 2692 result_error.Clear(); 2693 // NULL out everything just to be safe 2694 memset (dst, 0, dst_max_len); 2695 Error error; 2696 addr_t curr_addr = addr; 2697 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2698 size_t bytes_left = dst_max_len - 1; 2699 char *curr_dst = dst; 2700 2701 while (bytes_left > 0) 2702 { 2703 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2704 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2705 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2706 2707 if (bytes_read == 0) 2708 { 2709 result_error = error; 2710 dst[total_cstr_len] = '\0'; 2711 break; 2712 } 2713 const size_t len = strlen(curr_dst); 2714 2715 total_cstr_len += len; 2716 2717 if (len < bytes_to_read) 2718 break; 2719 2720 curr_dst += bytes_read; 2721 curr_addr += bytes_read; 2722 bytes_left -= bytes_read; 2723 } 2724 } 2725 else 2726 { 2727 if (dst == NULL) 2728 result_error.SetErrorString("invalid arguments"); 2729 else 2730 result_error.Clear(); 2731 } 2732 return total_cstr_len; 2733 } 2734 2735 size_t 2736 Process::ReadMemoryFromInferior (addr_t addr, void *buf, size_t size, Error &error) 2737 { 2738 if (buf == NULL || size == 0) 2739 return 0; 2740 2741 size_t bytes_read = 0; 2742 uint8_t *bytes = (uint8_t *)buf; 2743 2744 while (bytes_read < size) 2745 { 2746 const size_t curr_size = size - bytes_read; 2747 const size_t curr_bytes_read = DoReadMemory (addr + bytes_read, 2748 bytes + bytes_read, 2749 curr_size, 2750 error); 2751 bytes_read += curr_bytes_read; 2752 if (curr_bytes_read == curr_size || curr_bytes_read == 0) 2753 break; 2754 } 2755 2756 // Replace any software breakpoint opcodes that fall into this range back 2757 // into "buf" before we return 2758 if (bytes_read > 0) 2759 RemoveBreakpointOpcodesFromBuffer (addr, bytes_read, (uint8_t *)buf); 2760 return bytes_read; 2761 } 2762 2763 uint64_t 2764 Process::ReadUnsignedIntegerFromMemory (lldb::addr_t vm_addr, size_t integer_byte_size, uint64_t fail_value, Error &error) 2765 { 2766 Scalar scalar; 2767 if (ReadScalarIntegerFromMemory(vm_addr, integer_byte_size, false, scalar, error)) 2768 return scalar.ULongLong(fail_value); 2769 return fail_value; 2770 } 2771 2772 addr_t 2773 Process::ReadPointerFromMemory (lldb::addr_t vm_addr, Error &error) 2774 { 2775 Scalar scalar; 2776 if (ReadScalarIntegerFromMemory(vm_addr, GetAddressByteSize(), false, scalar, error)) 2777 return scalar.ULongLong(LLDB_INVALID_ADDRESS); 2778 return LLDB_INVALID_ADDRESS; 2779 } 2780 2781 2782 bool 2783 Process::WritePointerToMemory (lldb::addr_t vm_addr, 2784 lldb::addr_t ptr_value, 2785 Error &error) 2786 { 2787 Scalar scalar; 2788 const uint32_t addr_byte_size = GetAddressByteSize(); 2789 if (addr_byte_size <= 4) 2790 scalar = (uint32_t)ptr_value; 2791 else 2792 scalar = ptr_value; 2793 return WriteScalarToMemory(vm_addr, scalar, addr_byte_size, error) == addr_byte_size; 2794 } 2795 2796 size_t 2797 Process::WriteMemoryPrivate (addr_t addr, const void *buf, size_t size, Error &error) 2798 { 2799 size_t bytes_written = 0; 2800 const uint8_t *bytes = (const uint8_t *)buf; 2801 2802 while (bytes_written < size) 2803 { 2804 const size_t curr_size = size - bytes_written; 2805 const size_t curr_bytes_written = DoWriteMemory (addr + bytes_written, 2806 bytes + bytes_written, 2807 curr_size, 2808 error); 2809 bytes_written += curr_bytes_written; 2810 if (curr_bytes_written == curr_size || curr_bytes_written == 0) 2811 break; 2812 } 2813 return bytes_written; 2814 } 2815 2816 size_t 2817 Process::WriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2818 { 2819 #if defined (ENABLE_MEMORY_CACHING) 2820 m_memory_cache.Flush (addr, size); 2821 #endif 2822 2823 if (buf == NULL || size == 0) 2824 return 0; 2825 2826 m_mod_id.BumpMemoryID(); 2827 2828 // We need to write any data that would go where any current software traps 2829 // (enabled software breakpoints) any software traps (breakpoints) that we 2830 // may have placed in our tasks memory. 2831 2832 BreakpointSiteList bp_sites_in_range; 2833 2834 if (m_breakpoint_site_list.FindInRange (addr, addr + size, bp_sites_in_range)) 2835 { 2836 // No breakpoint sites overlap 2837 if (bp_sites_in_range.IsEmpty()) 2838 return WriteMemoryPrivate (addr, buf, size, error); 2839 else 2840 { 2841 const uint8_t *ubuf = (const uint8_t *)buf; 2842 uint64_t bytes_written = 0; 2843 2844 bp_sites_in_range.ForEach([this, addr, size, &bytes_written, &ubuf, &error](BreakpointSite *bp) -> void { 2845 2846 if (error.Success()) 2847 { 2848 addr_t intersect_addr; 2849 size_t intersect_size; 2850 size_t opcode_offset; 2851 const bool intersects = bp->IntersectsRange(addr, size, &intersect_addr, &intersect_size, &opcode_offset); 2852 UNUSED_IF_ASSERT_DISABLED(intersects); 2853 assert(intersects); 2854 assert(addr <= intersect_addr && intersect_addr < addr + size); 2855 assert(addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= addr + size); 2856 assert(opcode_offset + intersect_size <= bp->GetByteSize()); 2857 2858 // Check for bytes before this breakpoint 2859 const addr_t curr_addr = addr + bytes_written; 2860 if (intersect_addr > curr_addr) 2861 { 2862 // There are some bytes before this breakpoint that we need to 2863 // just write to memory 2864 size_t curr_size = intersect_addr - curr_addr; 2865 size_t curr_bytes_written = WriteMemoryPrivate (curr_addr, 2866 ubuf + bytes_written, 2867 curr_size, 2868 error); 2869 bytes_written += curr_bytes_written; 2870 if (curr_bytes_written != curr_size) 2871 { 2872 // We weren't able to write all of the requested bytes, we 2873 // are done looping and will return the number of bytes that 2874 // we have written so far. 2875 if (error.Success()) 2876 error.SetErrorToGenericError(); 2877 } 2878 } 2879 // Now write any bytes that would cover up any software breakpoints 2880 // directly into the breakpoint opcode buffer 2881 ::memcpy(bp->GetSavedOpcodeBytes() + opcode_offset, ubuf + bytes_written, intersect_size); 2882 bytes_written += intersect_size; 2883 } 2884 }); 2885 2886 if (bytes_written < size) 2887 WriteMemoryPrivate (addr + bytes_written, 2888 ubuf + bytes_written, 2889 size - bytes_written, 2890 error); 2891 } 2892 } 2893 else 2894 { 2895 return WriteMemoryPrivate (addr, buf, size, error); 2896 } 2897 2898 // Write any remaining bytes after the last breakpoint if we have any left 2899 return 0; //bytes_written; 2900 } 2901 2902 size_t 2903 Process::WriteScalarToMemory (addr_t addr, const Scalar &scalar, size_t byte_size, Error &error) 2904 { 2905 if (byte_size == UINT32_MAX) 2906 byte_size = scalar.GetByteSize(); 2907 if (byte_size > 0) 2908 { 2909 uint8_t buf[32]; 2910 const size_t mem_size = scalar.GetAsMemoryData (buf, byte_size, GetByteOrder(), error); 2911 if (mem_size > 0) 2912 return WriteMemory(addr, buf, mem_size, error); 2913 else 2914 error.SetErrorString ("failed to get scalar as memory data"); 2915 } 2916 else 2917 { 2918 error.SetErrorString ("invalid scalar value"); 2919 } 2920 return 0; 2921 } 2922 2923 size_t 2924 Process::ReadScalarIntegerFromMemory (addr_t addr, 2925 uint32_t byte_size, 2926 bool is_signed, 2927 Scalar &scalar, 2928 Error &error) 2929 { 2930 uint64_t uval = 0; 2931 if (byte_size == 0) 2932 { 2933 error.SetErrorString ("byte size is zero"); 2934 } 2935 else if (byte_size & (byte_size - 1)) 2936 { 2937 error.SetErrorStringWithFormat ("byte size %u is not a power of 2", byte_size); 2938 } 2939 else if (byte_size <= sizeof(uval)) 2940 { 2941 const size_t bytes_read = ReadMemory (addr, &uval, byte_size, error); 2942 if (bytes_read == byte_size) 2943 { 2944 DataExtractor data (&uval, sizeof(uval), GetByteOrder(), GetAddressByteSize()); 2945 lldb::offset_t offset = 0; 2946 if (byte_size <= 4) 2947 scalar = data.GetMaxU32 (&offset, byte_size); 2948 else 2949 scalar = data.GetMaxU64 (&offset, byte_size); 2950 if (is_signed) 2951 scalar.SignExtend(byte_size * 8); 2952 return bytes_read; 2953 } 2954 } 2955 else 2956 { 2957 error.SetErrorStringWithFormat ("byte size of %u is too large for integer scalar type", byte_size); 2958 } 2959 return 0; 2960 } 2961 2962 #define USE_ALLOCATE_MEMORY_CACHE 1 2963 addr_t 2964 Process::AllocateMemory(size_t size, uint32_t permissions, Error &error) 2965 { 2966 if (GetPrivateState() != eStateStopped) 2967 return LLDB_INVALID_ADDRESS; 2968 2969 #if defined (USE_ALLOCATE_MEMORY_CACHE) 2970 return m_allocated_memory_cache.AllocateMemory(size, permissions, error); 2971 #else 2972 addr_t allocated_addr = DoAllocateMemory (size, permissions, error); 2973 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2974 if (log) 2975 log->Printf("Process::AllocateMemory(size=%" PRIu64 ", permissions=%s) => 0x%16.16" PRIx64 " (m_stop_id = %u m_memory_id = %u)", 2976 (uint64_t)size, 2977 GetPermissionsAsCString (permissions), 2978 (uint64_t)allocated_addr, 2979 m_mod_id.GetStopID(), 2980 m_mod_id.GetMemoryID()); 2981 return allocated_addr; 2982 #endif 2983 } 2984 2985 bool 2986 Process::CanJIT () 2987 { 2988 if (m_can_jit == eCanJITDontKnow) 2989 { 2990 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2991 Error err; 2992 2993 uint64_t allocated_memory = AllocateMemory(8, 2994 ePermissionsReadable | ePermissionsWritable | ePermissionsExecutable, 2995 err); 2996 2997 if (err.Success()) 2998 { 2999 m_can_jit = eCanJITYes; 3000 if (log) 3001 log->Printf ("Process::%s pid %" PRIu64 " allocation test passed, CanJIT () is true", __FUNCTION__, GetID ()); 3002 } 3003 else 3004 { 3005 m_can_jit = eCanJITNo; 3006 if (log) 3007 log->Printf ("Process::%s pid %" PRIu64 " allocation test failed, CanJIT () is false: %s", __FUNCTION__, GetID (), err.AsCString ()); 3008 } 3009 3010 DeallocateMemory (allocated_memory); 3011 } 3012 3013 return m_can_jit == eCanJITYes; 3014 } 3015 3016 void 3017 Process::SetCanJIT (bool can_jit) 3018 { 3019 m_can_jit = (can_jit ? eCanJITYes : eCanJITNo); 3020 } 3021 3022 void 3023 Process::SetCanRunCode (bool can_run_code) 3024 { 3025 SetCanJIT(can_run_code); 3026 m_can_interpret_function_calls = can_run_code; 3027 } 3028 3029 Error 3030 Process::DeallocateMemory (addr_t ptr) 3031 { 3032 Error error; 3033 #if defined (USE_ALLOCATE_MEMORY_CACHE) 3034 if (!m_allocated_memory_cache.DeallocateMemory(ptr)) 3035 { 3036 error.SetErrorStringWithFormat ("deallocation of memory at 0x%" PRIx64 " failed.", (uint64_t)ptr); 3037 } 3038 #else 3039 error = DoDeallocateMemory (ptr); 3040 3041 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3042 if (log) 3043 log->Printf("Process::DeallocateMemory(addr=0x%16.16" PRIx64 ") => err = %s (m_stop_id = %u, m_memory_id = %u)", 3044 ptr, 3045 error.AsCString("SUCCESS"), 3046 m_mod_id.GetStopID(), 3047 m_mod_id.GetMemoryID()); 3048 #endif 3049 return error; 3050 } 3051 3052 3053 ModuleSP 3054 Process::ReadModuleFromMemory (const FileSpec& file_spec, 3055 lldb::addr_t header_addr, 3056 size_t size_to_read) 3057 { 3058 Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST); 3059 if (log) 3060 { 3061 log->Printf ("Process::ReadModuleFromMemory reading %s binary from memory", file_spec.GetPath().c_str()); 3062 } 3063 ModuleSP module_sp (new Module (file_spec, ArchSpec())); 3064 if (module_sp) 3065 { 3066 Error error; 3067 ObjectFile *objfile = module_sp->GetMemoryObjectFile (shared_from_this(), header_addr, error, size_to_read); 3068 if (objfile) 3069 return module_sp; 3070 } 3071 return ModuleSP(); 3072 } 3073 3074 bool 3075 Process::GetLoadAddressPermissions (lldb::addr_t load_addr, uint32_t &permissions) 3076 { 3077 MemoryRegionInfo range_info; 3078 permissions = 0; 3079 Error error (GetMemoryRegionInfo (load_addr, range_info)); 3080 if (!error.Success()) 3081 return false; 3082 if (range_info.GetReadable() == MemoryRegionInfo::eDontKnow 3083 || range_info.GetWritable() == MemoryRegionInfo::eDontKnow 3084 || range_info.GetExecutable() == MemoryRegionInfo::eDontKnow) 3085 { 3086 return false; 3087 } 3088 3089 if (range_info.GetReadable() == MemoryRegionInfo::eYes) 3090 permissions |= lldb::ePermissionsReadable; 3091 3092 if (range_info.GetWritable() == MemoryRegionInfo::eYes) 3093 permissions |= lldb::ePermissionsWritable; 3094 3095 if (range_info.GetExecutable() == MemoryRegionInfo::eYes) 3096 permissions |= lldb::ePermissionsExecutable; 3097 3098 return true; 3099 } 3100 3101 Error 3102 Process::EnableWatchpoint (Watchpoint *watchpoint, bool notify) 3103 { 3104 Error error; 3105 error.SetErrorString("watchpoints are not supported"); 3106 return error; 3107 } 3108 3109 Error 3110 Process::DisableWatchpoint (Watchpoint *watchpoint, bool notify) 3111 { 3112 Error error; 3113 error.SetErrorString("watchpoints are not supported"); 3114 return error; 3115 } 3116 3117 StateType 3118 Process::WaitForProcessStopPrivate (const TimeValue *timeout, EventSP &event_sp) 3119 { 3120 StateType state; 3121 // Now wait for the process to launch and return control to us, and then 3122 // call DidLaunch: 3123 while (1) 3124 { 3125 event_sp.reset(); 3126 state = WaitForStateChangedEventsPrivate (timeout, event_sp); 3127 3128 if (StateIsStoppedState(state, false)) 3129 break; 3130 3131 // If state is invalid, then we timed out 3132 if (state == eStateInvalid) 3133 break; 3134 3135 if (event_sp) 3136 HandlePrivateEvent (event_sp); 3137 } 3138 return state; 3139 } 3140 3141 void 3142 Process::LoadOperatingSystemPlugin(bool flush) 3143 { 3144 if (flush) 3145 m_thread_list.Clear(); 3146 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3147 if (flush) 3148 Flush(); 3149 } 3150 3151 Error 3152 Process::Launch (ProcessLaunchInfo &launch_info) 3153 { 3154 Error error; 3155 m_abi_sp.reset(); 3156 m_dyld_ap.reset(); 3157 m_jit_loaders_ap.reset(); 3158 m_system_runtime_ap.reset(); 3159 m_os_ap.reset(); 3160 m_process_input_reader.reset(); 3161 m_stop_info_override_callback = NULL; 3162 3163 Module *exe_module = GetTarget().GetExecutableModulePointer(); 3164 if (exe_module) 3165 { 3166 char local_exec_file_path[PATH_MAX]; 3167 char platform_exec_file_path[PATH_MAX]; 3168 exe_module->GetFileSpec().GetPath(local_exec_file_path, sizeof(local_exec_file_path)); 3169 exe_module->GetPlatformFileSpec().GetPath(platform_exec_file_path, sizeof(platform_exec_file_path)); 3170 if (exe_module->GetFileSpec().Exists()) 3171 { 3172 // Install anything that might need to be installed prior to launching. 3173 // For host systems, this will do nothing, but if we are connected to a 3174 // remote platform it will install any needed binaries 3175 error = GetTarget().Install(&launch_info); 3176 if (error.Fail()) 3177 return error; 3178 3179 if (PrivateStateThreadIsValid ()) 3180 PausePrivateStateThread (); 3181 3182 error = WillLaunch (exe_module); 3183 if (error.Success()) 3184 { 3185 const bool restarted = false; 3186 SetPublicState (eStateLaunching, restarted); 3187 m_should_detach = false; 3188 3189 if (m_public_run_lock.TrySetRunning()) 3190 { 3191 // Now launch using these arguments. 3192 error = DoLaunch (exe_module, launch_info); 3193 } 3194 else 3195 { 3196 // This shouldn't happen 3197 error.SetErrorString("failed to acquire process run lock"); 3198 } 3199 3200 if (error.Fail()) 3201 { 3202 if (GetID() != LLDB_INVALID_PROCESS_ID) 3203 { 3204 SetID (LLDB_INVALID_PROCESS_ID); 3205 const char *error_string = error.AsCString(); 3206 if (error_string == NULL) 3207 error_string = "launch failed"; 3208 SetExitStatus (-1, error_string); 3209 } 3210 } 3211 else 3212 { 3213 EventSP event_sp; 3214 TimeValue timeout_time; 3215 timeout_time = TimeValue::Now(); 3216 timeout_time.OffsetWithSeconds(10); 3217 StateType state = WaitForProcessStopPrivate(&timeout_time, event_sp); 3218 3219 if (state == eStateInvalid || event_sp.get() == NULL) 3220 { 3221 // We were able to launch the process, but we failed to 3222 // catch the initial stop. 3223 error.SetErrorString ("failed to catch stop after launch"); 3224 SetExitStatus (0, "failed to catch stop after launch"); 3225 Destroy(false); 3226 } 3227 else if (state == eStateStopped || state == eStateCrashed) 3228 { 3229 3230 DidLaunch (); 3231 3232 DynamicLoader *dyld = GetDynamicLoader (); 3233 if (dyld) 3234 dyld->DidLaunch(); 3235 3236 GetJITLoaders().DidLaunch(); 3237 3238 SystemRuntime *system_runtime = GetSystemRuntime (); 3239 if (system_runtime) 3240 system_runtime->DidLaunch(); 3241 3242 LoadOperatingSystemPlugin(false); 3243 3244 // Note, the stop event was consumed above, but not handled. This was done 3245 // to give DidLaunch a chance to run. The target is either stopped or crashed. 3246 // Directly set the state. This is done to prevent a stop message with a bunch 3247 // of spurious output on thread status, as well as not pop a ProcessIOHandler. 3248 SetPublicState(state, false); 3249 3250 if (PrivateStateThreadIsValid ()) 3251 ResumePrivateStateThread (); 3252 else 3253 StartPrivateStateThread (); 3254 3255 m_stop_info_override_callback = GetTarget().GetArchitecture().GetStopInfoOverrideCallback(); 3256 3257 // Target was stopped at entry as was intended. Need to notify the listeners 3258 // about it. 3259 if (state == eStateStopped && launch_info.GetFlags().Test(eLaunchFlagStopAtEntry)) 3260 HandlePrivateEvent(event_sp); 3261 } 3262 else if (state == eStateExited) 3263 { 3264 // We exited while trying to launch somehow. Don't call DidLaunch as that's 3265 // not likely to work, and return an invalid pid. 3266 HandlePrivateEvent (event_sp); 3267 } 3268 } 3269 } 3270 } 3271 else 3272 { 3273 error.SetErrorStringWithFormat("file doesn't exist: '%s'", local_exec_file_path); 3274 } 3275 } 3276 return error; 3277 } 3278 3279 3280 Error 3281 Process::LoadCore () 3282 { 3283 Error error = DoLoadCore(); 3284 if (error.Success()) 3285 { 3286 Listener listener ("lldb.process.load_core_listener"); 3287 HijackProcessEvents(&listener); 3288 3289 if (PrivateStateThreadIsValid ()) 3290 ResumePrivateStateThread (); 3291 else 3292 StartPrivateStateThread (); 3293 3294 DynamicLoader *dyld = GetDynamicLoader (); 3295 if (dyld) 3296 dyld->DidAttach(); 3297 3298 GetJITLoaders().DidAttach(); 3299 3300 SystemRuntime *system_runtime = GetSystemRuntime (); 3301 if (system_runtime) 3302 system_runtime->DidAttach(); 3303 3304 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3305 // We successfully loaded a core file, now pretend we stopped so we can 3306 // show all of the threads in the core file and explore the crashed 3307 // state. 3308 SetPrivateState (eStateStopped); 3309 3310 // Wait indefinitely for a stopped event since we just posted one above... 3311 lldb::EventSP event_sp; 3312 listener.WaitForEvent (NULL, event_sp); 3313 StateType state = ProcessEventData::GetStateFromEvent(event_sp.get()); 3314 3315 if (!StateIsStoppedState (state, false)) 3316 { 3317 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3318 if (log) 3319 log->Printf("Process::Halt() failed to stop, state is: %s", StateAsCString(state)); 3320 error.SetErrorString ("Did not get stopped event after loading the core file."); 3321 } 3322 RestoreProcessEvents (); 3323 } 3324 return error; 3325 } 3326 3327 DynamicLoader * 3328 Process::GetDynamicLoader () 3329 { 3330 if (m_dyld_ap.get() == NULL) 3331 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 3332 return m_dyld_ap.get(); 3333 } 3334 3335 const lldb::DataBufferSP 3336 Process::GetAuxvData() 3337 { 3338 return DataBufferSP (); 3339 } 3340 3341 JITLoaderList & 3342 Process::GetJITLoaders () 3343 { 3344 if (!m_jit_loaders_ap) 3345 { 3346 m_jit_loaders_ap.reset(new JITLoaderList()); 3347 JITLoader::LoadPlugins(this, *m_jit_loaders_ap); 3348 } 3349 return *m_jit_loaders_ap; 3350 } 3351 3352 SystemRuntime * 3353 Process::GetSystemRuntime () 3354 { 3355 if (m_system_runtime_ap.get() == NULL) 3356 m_system_runtime_ap.reset (SystemRuntime::FindPlugin(this)); 3357 return m_system_runtime_ap.get(); 3358 } 3359 3360 Process::AttachCompletionHandler::AttachCompletionHandler (Process *process, uint32_t exec_count) : 3361 NextEventAction (process), 3362 m_exec_count (exec_count) 3363 { 3364 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3365 if (log) 3366 log->Printf ("Process::AttachCompletionHandler::%s process=%p, exec_count=%" PRIu32, __FUNCTION__, static_cast<void*>(process), exec_count); 3367 } 3368 3369 Process::NextEventAction::EventActionResult 3370 Process::AttachCompletionHandler::PerformAction (lldb::EventSP &event_sp) 3371 { 3372 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3373 3374 StateType state = ProcessEventData::GetStateFromEvent (event_sp.get()); 3375 if (log) 3376 log->Printf ("Process::AttachCompletionHandler::%s called with state %s (%d)", __FUNCTION__, StateAsCString(state), static_cast<int> (state)); 3377 3378 switch (state) 3379 { 3380 case eStateAttaching: 3381 return eEventActionSuccess; 3382 3383 case eStateRunning: 3384 case eStateConnected: 3385 return eEventActionRetry; 3386 3387 case eStateStopped: 3388 case eStateCrashed: 3389 { 3390 // During attach, prior to sending the eStateStopped event, 3391 // lldb_private::Process subclasses must set the new process ID. 3392 assert (m_process->GetID() != LLDB_INVALID_PROCESS_ID); 3393 // We don't want these events to be reported, so go set the ShouldReportStop here: 3394 m_process->GetThreadList().SetShouldReportStop (eVoteNo); 3395 3396 if (m_exec_count > 0) 3397 { 3398 --m_exec_count; 3399 3400 if (log) 3401 log->Printf ("Process::AttachCompletionHandler::%s state %s: reduced remaining exec count to %" PRIu32 ", requesting resume", __FUNCTION__, StateAsCString(state), m_exec_count); 3402 3403 RequestResume(); 3404 return eEventActionRetry; 3405 } 3406 else 3407 { 3408 if (log) 3409 log->Printf ("Process::AttachCompletionHandler::%s state %s: no more execs expected to start, continuing with attach", __FUNCTION__, StateAsCString(state)); 3410 3411 m_process->CompleteAttach (); 3412 return eEventActionSuccess; 3413 } 3414 } 3415 break; 3416 3417 default: 3418 case eStateExited: 3419 case eStateInvalid: 3420 break; 3421 } 3422 3423 m_exit_string.assign ("No valid Process"); 3424 return eEventActionExit; 3425 } 3426 3427 Process::NextEventAction::EventActionResult 3428 Process::AttachCompletionHandler::HandleBeingInterrupted() 3429 { 3430 return eEventActionSuccess; 3431 } 3432 3433 const char * 3434 Process::AttachCompletionHandler::GetExitString () 3435 { 3436 return m_exit_string.c_str(); 3437 } 3438 3439 Listener & 3440 ProcessAttachInfo::GetListenerForProcess (Debugger &debugger) 3441 { 3442 if (m_listener_sp) 3443 return *m_listener_sp; 3444 else 3445 return debugger.GetListener(); 3446 } 3447 3448 Error 3449 Process::Attach (ProcessAttachInfo &attach_info) 3450 { 3451 m_abi_sp.reset(); 3452 m_process_input_reader.reset(); 3453 m_dyld_ap.reset(); 3454 m_jit_loaders_ap.reset(); 3455 m_system_runtime_ap.reset(); 3456 m_os_ap.reset(); 3457 m_stop_info_override_callback = NULL; 3458 3459 lldb::pid_t attach_pid = attach_info.GetProcessID(); 3460 Error error; 3461 if (attach_pid == LLDB_INVALID_PROCESS_ID) 3462 { 3463 char process_name[PATH_MAX]; 3464 3465 if (attach_info.GetExecutableFile().GetPath (process_name, sizeof(process_name))) 3466 { 3467 const bool wait_for_launch = attach_info.GetWaitForLaunch(); 3468 3469 if (wait_for_launch) 3470 { 3471 error = WillAttachToProcessWithName(process_name, wait_for_launch); 3472 if (error.Success()) 3473 { 3474 if (m_public_run_lock.TrySetRunning()) 3475 { 3476 m_should_detach = true; 3477 const bool restarted = false; 3478 SetPublicState (eStateAttaching, restarted); 3479 // Now attach using these arguments. 3480 error = DoAttachToProcessWithName (process_name, attach_info); 3481 } 3482 else 3483 { 3484 // This shouldn't happen 3485 error.SetErrorString("failed to acquire process run lock"); 3486 } 3487 3488 if (error.Fail()) 3489 { 3490 if (GetID() != LLDB_INVALID_PROCESS_ID) 3491 { 3492 SetID (LLDB_INVALID_PROCESS_ID); 3493 if (error.AsCString() == NULL) 3494 error.SetErrorString("attach failed"); 3495 3496 SetExitStatus(-1, error.AsCString()); 3497 } 3498 } 3499 else 3500 { 3501 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3502 StartPrivateStateThread(); 3503 } 3504 return error; 3505 } 3506 } 3507 else 3508 { 3509 ProcessInstanceInfoList process_infos; 3510 PlatformSP platform_sp (GetTarget().GetPlatform ()); 3511 3512 if (platform_sp) 3513 { 3514 ProcessInstanceInfoMatch match_info; 3515 match_info.GetProcessInfo() = attach_info; 3516 match_info.SetNameMatchType (eNameMatchEquals); 3517 platform_sp->FindProcesses (match_info, process_infos); 3518 const uint32_t num_matches = process_infos.GetSize(); 3519 if (num_matches == 1) 3520 { 3521 attach_pid = process_infos.GetProcessIDAtIndex(0); 3522 // Fall through and attach using the above process ID 3523 } 3524 else 3525 { 3526 match_info.GetProcessInfo().GetExecutableFile().GetPath (process_name, sizeof(process_name)); 3527 if (num_matches > 1) 3528 { 3529 StreamString s; 3530 ProcessInstanceInfo::DumpTableHeader (s, platform_sp.get(), true, false); 3531 for (size_t i = 0; i < num_matches; i++) 3532 { 3533 process_infos.GetProcessInfoAtIndex(i).DumpAsTableRow(s, platform_sp.get(), true, false); 3534 } 3535 error.SetErrorStringWithFormat ("more than one process named %s:\n%s", 3536 process_name, 3537 s.GetData()); 3538 } 3539 else 3540 error.SetErrorStringWithFormat ("could not find a process named %s", process_name); 3541 } 3542 } 3543 else 3544 { 3545 error.SetErrorString ("invalid platform, can't find processes by name"); 3546 return error; 3547 } 3548 } 3549 } 3550 else 3551 { 3552 error.SetErrorString ("invalid process name"); 3553 } 3554 } 3555 3556 if (attach_pid != LLDB_INVALID_PROCESS_ID) 3557 { 3558 error = WillAttachToProcessWithID(attach_pid); 3559 if (error.Success()) 3560 { 3561 3562 if (m_public_run_lock.TrySetRunning()) 3563 { 3564 // Now attach using these arguments. 3565 m_should_detach = true; 3566 const bool restarted = false; 3567 SetPublicState (eStateAttaching, restarted); 3568 error = DoAttachToProcessWithID (attach_pid, attach_info); 3569 } 3570 else 3571 { 3572 // This shouldn't happen 3573 error.SetErrorString("failed to acquire process run lock"); 3574 } 3575 3576 if (error.Success()) 3577 { 3578 3579 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3580 StartPrivateStateThread(); 3581 } 3582 else 3583 { 3584 if (GetID() != LLDB_INVALID_PROCESS_ID) 3585 SetID (LLDB_INVALID_PROCESS_ID); 3586 3587 const char *error_string = error.AsCString(); 3588 if (error_string == NULL) 3589 error_string = "attach failed"; 3590 3591 SetExitStatus(-1, error_string); 3592 } 3593 } 3594 } 3595 return error; 3596 } 3597 3598 void 3599 Process::CompleteAttach () 3600 { 3601 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3602 if (log) 3603 log->Printf ("Process::%s()", __FUNCTION__); 3604 3605 // Let the process subclass figure out at much as it can about the process 3606 // before we go looking for a dynamic loader plug-in. 3607 ArchSpec process_arch; 3608 DidAttach(process_arch); 3609 3610 if (process_arch.IsValid()) 3611 { 3612 GetTarget().SetArchitecture(process_arch); 3613 if (log) 3614 { 3615 const char *triple_str = process_arch.GetTriple().getTriple().c_str (); 3616 log->Printf ("Process::%s replacing process architecture with DidAttach() architecture: %s", 3617 __FUNCTION__, 3618 triple_str ? triple_str : "<null>"); 3619 } 3620 } 3621 3622 // We just attached. If we have a platform, ask it for the process architecture, and if it isn't 3623 // the same as the one we've already set, switch architectures. 3624 PlatformSP platform_sp (GetTarget().GetPlatform ()); 3625 assert (platform_sp.get()); 3626 if (platform_sp) 3627 { 3628 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 3629 if (target_arch.IsValid() && !platform_sp->IsCompatibleArchitecture (target_arch, false, NULL)) 3630 { 3631 ArchSpec platform_arch; 3632 platform_sp = platform_sp->GetPlatformForArchitecture (target_arch, &platform_arch); 3633 if (platform_sp) 3634 { 3635 GetTarget().SetPlatform (platform_sp); 3636 GetTarget().SetArchitecture(platform_arch); 3637 if (log) 3638 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 ()); 3639 } 3640 } 3641 else if (!process_arch.IsValid()) 3642 { 3643 ProcessInstanceInfo process_info; 3644 platform_sp->GetProcessInfo (GetID(), process_info); 3645 const ArchSpec &process_arch = process_info.GetArchitecture(); 3646 if (process_arch.IsValid() && !GetTarget().GetArchitecture().IsExactMatch(process_arch)) 3647 { 3648 GetTarget().SetArchitecture (process_arch); 3649 if (log) 3650 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 ()); 3651 } 3652 } 3653 } 3654 3655 // We have completed the attach, now it is time to find the dynamic loader 3656 // plug-in 3657 DynamicLoader *dyld = GetDynamicLoader (); 3658 if (dyld) 3659 { 3660 dyld->DidAttach(); 3661 if (log) 3662 { 3663 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3664 log->Printf ("Process::%s after DynamicLoader::DidAttach(), target executable is %s (using %s plugin)", 3665 __FUNCTION__, 3666 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>", 3667 dyld->GetPluginName().AsCString ("<unnamed>")); 3668 } 3669 } 3670 3671 GetJITLoaders().DidAttach(); 3672 3673 SystemRuntime *system_runtime = GetSystemRuntime (); 3674 if (system_runtime) 3675 { 3676 system_runtime->DidAttach(); 3677 if (log) 3678 { 3679 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3680 log->Printf ("Process::%s after SystemRuntime::DidAttach(), target executable is %s (using %s plugin)", 3681 __FUNCTION__, 3682 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>", 3683 system_runtime->GetPluginName().AsCString("<unnamed>")); 3684 } 3685 } 3686 3687 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3688 // Figure out which one is the executable, and set that in our target: 3689 const ModuleList &target_modules = GetTarget().GetImages(); 3690 Mutex::Locker modules_locker(target_modules.GetMutex()); 3691 size_t num_modules = target_modules.GetSize(); 3692 ModuleSP new_executable_module_sp; 3693 3694 for (size_t i = 0; i < num_modules; i++) 3695 { 3696 ModuleSP module_sp (target_modules.GetModuleAtIndexUnlocked (i)); 3697 if (module_sp && module_sp->IsExecutable()) 3698 { 3699 if (GetTarget().GetExecutableModulePointer() != module_sp.get()) 3700 new_executable_module_sp = module_sp; 3701 break; 3702 } 3703 } 3704 if (new_executable_module_sp) 3705 { 3706 GetTarget().SetExecutableModule (new_executable_module_sp, false); 3707 if (log) 3708 { 3709 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3710 log->Printf ("Process::%s after looping through modules, target executable is %s", 3711 __FUNCTION__, 3712 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>"); 3713 } 3714 } 3715 3716 m_stop_info_override_callback = process_arch.GetStopInfoOverrideCallback(); 3717 } 3718 3719 Error 3720 Process::ConnectRemote (Stream *strm, const char *remote_url) 3721 { 3722 m_abi_sp.reset(); 3723 m_process_input_reader.reset(); 3724 3725 // Find the process and its architecture. Make sure it matches the architecture 3726 // of the current Target, and if not adjust it. 3727 3728 Error error (DoConnectRemote (strm, remote_url)); 3729 if (error.Success()) 3730 { 3731 if (GetID() != LLDB_INVALID_PROCESS_ID) 3732 { 3733 EventSP event_sp; 3734 StateType state = WaitForProcessStopPrivate(NULL, event_sp); 3735 3736 if (state == eStateStopped || state == eStateCrashed) 3737 { 3738 // If we attached and actually have a process on the other end, then 3739 // this ended up being the equivalent of an attach. 3740 CompleteAttach (); 3741 3742 // This delays passing the stopped event to listeners till 3743 // CompleteAttach gets a chance to complete... 3744 HandlePrivateEvent (event_sp); 3745 3746 } 3747 } 3748 3749 if (PrivateStateThreadIsValid ()) 3750 ResumePrivateStateThread (); 3751 else 3752 StartPrivateStateThread (); 3753 } 3754 return error; 3755 } 3756 3757 3758 Error 3759 Process::PrivateResume () 3760 { 3761 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_STEP)); 3762 if (log) 3763 log->Printf("Process::PrivateResume() m_stop_id = %u, public state: %s private state: %s", 3764 m_mod_id.GetStopID(), 3765 StateAsCString(m_public_state.GetValue()), 3766 StateAsCString(m_private_state.GetValue())); 3767 3768 Error error (WillResume()); 3769 // Tell the process it is about to resume before the thread list 3770 if (error.Success()) 3771 { 3772 // Now let the thread list know we are about to resume so it 3773 // can let all of our threads know that they are about to be 3774 // resumed. Threads will each be called with 3775 // Thread::WillResume(StateType) where StateType contains the state 3776 // that they are supposed to have when the process is resumed 3777 // (suspended/running/stepping). Threads should also check 3778 // their resume signal in lldb::Thread::GetResumeSignal() 3779 // to see if they are supposed to start back up with a signal. 3780 if (m_thread_list.WillResume()) 3781 { 3782 // Last thing, do the PreResumeActions. 3783 if (!RunPreResumeActions()) 3784 { 3785 error.SetErrorStringWithFormat ("Process::PrivateResume PreResumeActions failed, not resuming."); 3786 } 3787 else 3788 { 3789 m_mod_id.BumpResumeID(); 3790 error = DoResume(); 3791 if (error.Success()) 3792 { 3793 DidResume(); 3794 m_thread_list.DidResume(); 3795 if (log) 3796 log->Printf ("Process thinks the process has resumed."); 3797 } 3798 } 3799 } 3800 else 3801 { 3802 // Somebody wanted to run without running (e.g. we were faking a step from one frame of a set of inlined 3803 // frames that share the same PC to another.) So generate a continue & a stopped event, 3804 // and let the world handle them. 3805 if (log) 3806 log->Printf ("Process::PrivateResume() asked to simulate a start & stop."); 3807 3808 SetPrivateState(eStateRunning); 3809 SetPrivateState(eStateStopped); 3810 } 3811 } 3812 else if (log) 3813 log->Printf ("Process::PrivateResume() got an error \"%s\".", error.AsCString("<unknown error>")); 3814 return error; 3815 } 3816 3817 Error 3818 Process::Halt (bool clear_thread_plans) 3819 { 3820 // Don't clear the m_clear_thread_plans_on_stop, only set it to true if 3821 // in case it was already set and some thread plan logic calls halt on its 3822 // own. 3823 m_clear_thread_plans_on_stop |= clear_thread_plans; 3824 3825 // First make sure we aren't in the middle of handling an event, or we might restart. This is pretty weak, since 3826 // we could just straightaway get another event. It just narrows the window... 3827 m_currently_handling_event.WaitForValueEqualTo(false); 3828 3829 3830 // Pause our private state thread so we can ensure no one else eats 3831 // the stop event out from under us. 3832 Listener halt_listener ("lldb.process.halt_listener"); 3833 HijackPrivateProcessEvents(&halt_listener); 3834 3835 EventSP event_sp; 3836 Error error (WillHalt()); 3837 3838 bool restored_process_events = false; 3839 if (error.Success()) 3840 { 3841 3842 bool caused_stop = false; 3843 3844 // Ask the process subclass to actually halt our process 3845 error = DoHalt(caused_stop); 3846 if (error.Success()) 3847 { 3848 if (m_public_state.GetValue() == eStateAttaching) 3849 { 3850 // Don't hijack and eat the eStateExited as the code that was doing 3851 // the attach will be waiting for this event... 3852 RestorePrivateProcessEvents(); 3853 restored_process_events = true; 3854 SetExitStatus(SIGKILL, "Cancelled async attach."); 3855 Destroy (false); 3856 } 3857 else 3858 { 3859 // If "caused_stop" is true, then DoHalt stopped the process. If 3860 // "caused_stop" is false, the process was already stopped. 3861 // If the DoHalt caused the process to stop, then we want to catch 3862 // this event and set the interrupted bool to true before we pass 3863 // this along so clients know that the process was interrupted by 3864 // a halt command. 3865 if (caused_stop) 3866 { 3867 // Wait for 1 second for the process to stop. 3868 TimeValue timeout_time; 3869 timeout_time = TimeValue::Now(); 3870 timeout_time.OffsetWithSeconds(10); 3871 bool got_event = halt_listener.WaitForEvent (&timeout_time, event_sp); 3872 StateType state = ProcessEventData::GetStateFromEvent(event_sp.get()); 3873 3874 if (!got_event || state == eStateInvalid) 3875 { 3876 // We timeout out and didn't get a stop event... 3877 error.SetErrorStringWithFormat ("Halt timed out. State = %s", StateAsCString(GetState())); 3878 } 3879 else 3880 { 3881 if (StateIsStoppedState (state, false)) 3882 { 3883 // We caused the process to interrupt itself, so mark this 3884 // as such in the stop event so clients can tell an interrupted 3885 // process from a natural stop 3886 ProcessEventData::SetInterruptedInEvent (event_sp.get(), true); 3887 } 3888 else 3889 { 3890 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3891 if (log) 3892 log->Printf("Process::Halt() failed to stop, state is: %s", StateAsCString(state)); 3893 error.SetErrorString ("Did not get stopped event after halt."); 3894 } 3895 } 3896 } 3897 DidHalt(); 3898 } 3899 } 3900 } 3901 // Resume our private state thread before we post the event (if any) 3902 if (!restored_process_events) 3903 RestorePrivateProcessEvents(); 3904 3905 // Post any event we might have consumed. If all goes well, we will have 3906 // stopped the process, intercepted the event and set the interrupted 3907 // bool in the event. Post it to the private event queue and that will end up 3908 // correctly setting the state. 3909 if (event_sp) 3910 m_private_state_broadcaster.BroadcastEvent(event_sp); 3911 3912 return error; 3913 } 3914 3915 Error 3916 Process::HaltForDestroyOrDetach(lldb::EventSP &exit_event_sp) 3917 { 3918 Error error; 3919 if (m_public_state.GetValue() == eStateRunning) 3920 { 3921 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3922 if (log) 3923 log->Printf("Process::%s() About to halt.", __FUNCTION__); 3924 error = Halt(); 3925 if (error.Success()) 3926 { 3927 // Consume the halt event. 3928 TimeValue timeout (TimeValue::Now()); 3929 timeout.OffsetWithSeconds(1); 3930 StateType state = WaitForProcessToStop (&timeout, &exit_event_sp); 3931 3932 // If the process exited while we were waiting for it to stop, put the exited event into 3933 // the shared pointer passed in and return. Our caller doesn't need to do anything else, since 3934 // they don't have a process anymore... 3935 3936 if (state == eStateExited || m_private_state.GetValue() == eStateExited) 3937 { 3938 if (log) 3939 log->Printf("Process::HaltForDestroyOrDetach() Process exited while waiting to Halt."); 3940 return error; 3941 } 3942 else 3943 exit_event_sp.reset(); // It is ok to consume any non-exit stop events 3944 3945 if (state != eStateStopped) 3946 { 3947 if (log) 3948 log->Printf("Process::HaltForDestroyOrDetach() Halt failed to stop, state is: %s", StateAsCString(state)); 3949 // If we really couldn't stop the process then we should just error out here, but if the 3950 // lower levels just bobbled sending the event and we really are stopped, then continue on. 3951 StateType private_state = m_private_state.GetValue(); 3952 if (private_state != eStateStopped) 3953 { 3954 return error; 3955 } 3956 } 3957 } 3958 else 3959 { 3960 if (log) 3961 log->Printf("Process::HaltForDestroyOrDetach() Halt got error: %s", error.AsCString()); 3962 } 3963 } 3964 return error; 3965 } 3966 3967 Error 3968 Process::Detach (bool keep_stopped) 3969 { 3970 EventSP exit_event_sp; 3971 Error error; 3972 m_destroy_in_process = true; 3973 3974 error = WillDetach(); 3975 3976 if (error.Success()) 3977 { 3978 if (DetachRequiresHalt()) 3979 { 3980 error = HaltForDestroyOrDetach (exit_event_sp); 3981 if (!error.Success()) 3982 { 3983 m_destroy_in_process = false; 3984 return error; 3985 } 3986 else if (exit_event_sp) 3987 { 3988 // We shouldn't need to do anything else here. There's no process left to detach from... 3989 StopPrivateStateThread(); 3990 m_destroy_in_process = false; 3991 return error; 3992 } 3993 } 3994 3995 m_thread_list.DiscardThreadPlans(); 3996 DisableAllBreakpointSites(); 3997 3998 error = DoDetach(keep_stopped); 3999 if (error.Success()) 4000 { 4001 DidDetach(); 4002 StopPrivateStateThread(); 4003 } 4004 else 4005 { 4006 return error; 4007 } 4008 } 4009 m_destroy_in_process = false; 4010 4011 // If we exited when we were waiting for a process to stop, then 4012 // forward the event here so we don't lose the event 4013 if (exit_event_sp) 4014 { 4015 // Directly broadcast our exited event because we shut down our 4016 // private state thread above 4017 BroadcastEvent(exit_event_sp); 4018 } 4019 4020 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 4021 // the last events through the event system, in which case we might strand the write lock. Unlock 4022 // it here so when we do to tear down the process we don't get an error destroying the lock. 4023 4024 m_public_run_lock.SetStopped(); 4025 return error; 4026 } 4027 4028 Error 4029 Process::Destroy (bool force_kill) 4030 { 4031 4032 // Tell ourselves we are in the process of destroying the process, so that we don't do any unnecessary work 4033 // that might hinder the destruction. Remember to set this back to false when we are done. That way if the attempt 4034 // failed and the process stays around for some reason it won't be in a confused state. 4035 4036 if (force_kill) 4037 m_should_detach = false; 4038 4039 if (GetShouldDetach()) 4040 { 4041 // FIXME: This will have to be a process setting: 4042 bool keep_stopped = false; 4043 Detach(keep_stopped); 4044 } 4045 4046 m_destroy_in_process = true; 4047 4048 Error error (WillDestroy()); 4049 if (error.Success()) 4050 { 4051 EventSP exit_event_sp; 4052 if (DestroyRequiresHalt()) 4053 { 4054 error = HaltForDestroyOrDetach(exit_event_sp); 4055 } 4056 4057 if (m_public_state.GetValue() != eStateRunning) 4058 { 4059 // Ditch all thread plans, and remove all our breakpoints: in case we have to restart the target to 4060 // kill it, we don't want it hitting a breakpoint... 4061 // Only do this if we've stopped, however, since if we didn't manage to halt it above, then 4062 // we're not going to have much luck doing this now. 4063 m_thread_list.DiscardThreadPlans(); 4064 DisableAllBreakpointSites(); 4065 } 4066 4067 error = DoDestroy(); 4068 if (error.Success()) 4069 { 4070 DidDestroy(); 4071 StopPrivateStateThread(); 4072 } 4073 m_stdio_communication.Disconnect(); 4074 m_stdio_communication.StopReadThread(); 4075 m_stdin_forward = false; 4076 4077 if (m_process_input_reader) 4078 { 4079 m_process_input_reader->SetIsDone(true); 4080 m_process_input_reader->Cancel(); 4081 m_process_input_reader.reset(); 4082 } 4083 4084 // If we exited when we were waiting for a process to stop, then 4085 // forward the event here so we don't lose the event 4086 if (exit_event_sp) 4087 { 4088 // Directly broadcast our exited event because we shut down our 4089 // private state thread above 4090 BroadcastEvent(exit_event_sp); 4091 } 4092 4093 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 4094 // the last events through the event system, in which case we might strand the write lock. Unlock 4095 // it here so when we do to tear down the process we don't get an error destroying the lock. 4096 m_public_run_lock.SetStopped(); 4097 } 4098 4099 m_destroy_in_process = false; 4100 4101 return error; 4102 } 4103 4104 Error 4105 Process::Signal (int signal) 4106 { 4107 Error error (WillSignal()); 4108 if (error.Success()) 4109 { 4110 error = DoSignal(signal); 4111 if (error.Success()) 4112 DidSignal(); 4113 } 4114 return error; 4115 } 4116 4117 void 4118 Process::SetUnixSignals(UnixSignalsSP &&signals_sp) 4119 { 4120 assert (signals_sp && "null signals_sp"); 4121 m_unix_signals_sp = signals_sp; 4122 } 4123 4124 const lldb::UnixSignalsSP & 4125 Process::GetUnixSignals () 4126 { 4127 assert (m_unix_signals_sp && "null m_unix_signals_sp"); 4128 return m_unix_signals_sp; 4129 } 4130 4131 lldb::ByteOrder 4132 Process::GetByteOrder () const 4133 { 4134 return GetTarget().GetArchitecture().GetByteOrder(); 4135 } 4136 4137 uint32_t 4138 Process::GetAddressByteSize () const 4139 { 4140 return GetTarget().GetArchitecture().GetAddressByteSize(); 4141 } 4142 4143 4144 bool 4145 Process::ShouldBroadcastEvent (Event *event_ptr) 4146 { 4147 const StateType state = Process::ProcessEventData::GetStateFromEvent (event_ptr); 4148 bool return_value = true; 4149 Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_EVENTS | LIBLLDB_LOG_PROCESS)); 4150 4151 switch (state) 4152 { 4153 case eStateDetached: 4154 case eStateExited: 4155 case eStateUnloaded: 4156 m_stdio_communication.SynchronizeWithReadThread(); 4157 m_stdio_communication.Disconnect(); 4158 m_stdio_communication.StopReadThread(); 4159 m_stdin_forward = false; 4160 4161 // fall-through 4162 case eStateConnected: 4163 case eStateAttaching: 4164 case eStateLaunching: 4165 // These events indicate changes in the state of the debugging session, always report them. 4166 return_value = true; 4167 break; 4168 case eStateInvalid: 4169 // We stopped for no apparent reason, don't report it. 4170 return_value = false; 4171 break; 4172 case eStateRunning: 4173 case eStateStepping: 4174 // If we've started the target running, we handle the cases where we 4175 // are already running and where there is a transition from stopped to 4176 // running differently. 4177 // running -> running: Automatically suppress extra running events 4178 // stopped -> running: Report except when there is one or more no votes 4179 // and no yes votes. 4180 SynchronouslyNotifyStateChanged (state); 4181 if (m_force_next_event_delivery) 4182 return_value = true; 4183 else 4184 { 4185 switch (m_last_broadcast_state) 4186 { 4187 case eStateRunning: 4188 case eStateStepping: 4189 // We always suppress multiple runnings with no PUBLIC stop in between. 4190 return_value = false; 4191 break; 4192 default: 4193 // TODO: make this work correctly. For now always report 4194 // run if we aren't running so we don't miss any running 4195 // events. If I run the lldb/test/thread/a.out file and 4196 // break at main.cpp:58, run and hit the breakpoints on 4197 // multiple threads, then somehow during the stepping over 4198 // of all breakpoints no run gets reported. 4199 4200 // This is a transition from stop to run. 4201 switch (m_thread_list.ShouldReportRun (event_ptr)) 4202 { 4203 case eVoteYes: 4204 case eVoteNoOpinion: 4205 return_value = true; 4206 break; 4207 case eVoteNo: 4208 return_value = false; 4209 break; 4210 } 4211 break; 4212 } 4213 } 4214 break; 4215 case eStateStopped: 4216 case eStateCrashed: 4217 case eStateSuspended: 4218 { 4219 // We've stopped. First see if we're going to restart the target. 4220 // If we are going to stop, then we always broadcast the event. 4221 // If we aren't going to stop, let the thread plans decide if we're going to report this event. 4222 // If no thread has an opinion, we don't report it. 4223 4224 m_stdio_communication.SynchronizeWithReadThread(); 4225 RefreshStateAfterStop (); 4226 if (ProcessEventData::GetInterruptedFromEvent (event_ptr)) 4227 { 4228 if (log) 4229 log->Printf ("Process::ShouldBroadcastEvent (%p) stopped due to an interrupt, state: %s", 4230 static_cast<void*>(event_ptr), 4231 StateAsCString(state)); 4232 // Even though we know we are going to stop, we should let the threads have a look at the stop, 4233 // so they can properly set their state. 4234 m_thread_list.ShouldStop (event_ptr); 4235 return_value = true; 4236 } 4237 else 4238 { 4239 bool was_restarted = ProcessEventData::GetRestartedFromEvent (event_ptr); 4240 bool should_resume = false; 4241 4242 // It makes no sense to ask "ShouldStop" if we've already been restarted... 4243 // Asking the thread list is also not likely to go well, since we are running again. 4244 // So in that case just report the event. 4245 4246 if (!was_restarted) 4247 should_resume = m_thread_list.ShouldStop (event_ptr) == false; 4248 4249 if (was_restarted || should_resume || m_resume_requested) 4250 { 4251 Vote stop_vote = m_thread_list.ShouldReportStop (event_ptr); 4252 if (log) 4253 log->Printf ("Process::ShouldBroadcastEvent: should_stop: %i state: %s was_restarted: %i stop_vote: %d.", 4254 should_resume, StateAsCString(state), 4255 was_restarted, stop_vote); 4256 4257 switch (stop_vote) 4258 { 4259 case eVoteYes: 4260 return_value = true; 4261 break; 4262 case eVoteNoOpinion: 4263 case eVoteNo: 4264 return_value = false; 4265 break; 4266 } 4267 4268 if (!was_restarted) 4269 { 4270 if (log) 4271 log->Printf ("Process::ShouldBroadcastEvent (%p) Restarting process from state: %s", 4272 static_cast<void*>(event_ptr), 4273 StateAsCString(state)); 4274 ProcessEventData::SetRestartedInEvent(event_ptr, true); 4275 PrivateResume (); 4276 } 4277 4278 } 4279 else 4280 { 4281 return_value = true; 4282 SynchronouslyNotifyStateChanged (state); 4283 } 4284 } 4285 } 4286 break; 4287 } 4288 4289 // Forcing the next event delivery is a one shot deal. So reset it here. 4290 m_force_next_event_delivery = false; 4291 4292 // We do some coalescing of events (for instance two consecutive running events get coalesced.) 4293 // But we only coalesce against events we actually broadcast. So we use m_last_broadcast_state 4294 // to track that. NB - you can't use "m_public_state.GetValue()" for that purpose, as was originally done, 4295 // because the PublicState reflects the last event pulled off the queue, and there may be several 4296 // events stacked up on the queue unserviced. So the PublicState may not reflect the last broadcasted event 4297 // yet. m_last_broadcast_state gets updated here. 4298 4299 if (return_value) 4300 m_last_broadcast_state = state; 4301 4302 if (log) 4303 log->Printf ("Process::ShouldBroadcastEvent (%p) => new state: %s, last broadcast state: %s - %s", 4304 static_cast<void*>(event_ptr), StateAsCString(state), 4305 StateAsCString(m_last_broadcast_state), 4306 return_value ? "YES" : "NO"); 4307 return return_value; 4308 } 4309 4310 4311 bool 4312 Process::StartPrivateStateThread (bool is_secondary_thread) 4313 { 4314 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EVENTS)); 4315 4316 bool already_running = PrivateStateThreadIsValid (); 4317 if (log) 4318 log->Printf ("Process::%s()%s ", __FUNCTION__, already_running ? " already running" : " starting private state thread"); 4319 4320 if (!is_secondary_thread && already_running) 4321 return true; 4322 4323 // Create a thread that watches our internal state and controls which 4324 // events make it to clients (into the DCProcess event queue). 4325 char thread_name[1024]; 4326 4327 if (HostInfo::GetMaxThreadNameLength() <= 30) 4328 { 4329 // On platforms with abbreviated thread name lengths, choose thread names that fit within the limit. 4330 if (already_running) 4331 snprintf(thread_name, sizeof(thread_name), "intern-state-OV"); 4332 else 4333 snprintf(thread_name, sizeof(thread_name), "intern-state"); 4334 } 4335 else 4336 { 4337 if (already_running) 4338 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state-override(pid=%" PRIu64 ")>", GetID()); 4339 else 4340 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state(pid=%" PRIu64 ")>", GetID()); 4341 } 4342 4343 // Create the private state thread, and start it running. 4344 PrivateStateThreadArgs args = {this, is_secondary_thread}; 4345 m_private_state_thread = ThreadLauncher::LaunchThread(thread_name, Process::PrivateStateThread, (void *) &args, NULL); 4346 if (m_private_state_thread.IsJoinable()) 4347 { 4348 ResumePrivateStateThread(); 4349 return true; 4350 } 4351 else 4352 return false; 4353 } 4354 4355 void 4356 Process::PausePrivateStateThread () 4357 { 4358 ControlPrivateStateThread (eBroadcastInternalStateControlPause); 4359 } 4360 4361 void 4362 Process::ResumePrivateStateThread () 4363 { 4364 ControlPrivateStateThread (eBroadcastInternalStateControlResume); 4365 } 4366 4367 void 4368 Process::StopPrivateStateThread () 4369 { 4370 if (PrivateStateThreadIsValid ()) 4371 ControlPrivateStateThread (eBroadcastInternalStateControlStop); 4372 else 4373 { 4374 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4375 if (log) 4376 log->Printf ("Went to stop the private state thread, but it was already invalid."); 4377 } 4378 } 4379 4380 void 4381 Process::ControlPrivateStateThread (uint32_t signal) 4382 { 4383 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4384 4385 assert (signal == eBroadcastInternalStateControlStop || 4386 signal == eBroadcastInternalStateControlPause || 4387 signal == eBroadcastInternalStateControlResume); 4388 4389 if (log) 4390 log->Printf ("Process::%s (signal = %d)", __FUNCTION__, signal); 4391 4392 // Signal the private state thread. First we should copy this is case the 4393 // thread starts exiting since the private state thread will NULL this out 4394 // when it exits 4395 HostThread private_state_thread(m_private_state_thread); 4396 if (private_state_thread.IsJoinable()) 4397 { 4398 TimeValue timeout_time; 4399 bool timed_out; 4400 4401 m_private_state_control_broadcaster.BroadcastEvent (signal, NULL); 4402 4403 timeout_time = TimeValue::Now(); 4404 timeout_time.OffsetWithSeconds(2); 4405 if (log) 4406 log->Printf ("Sending control event of type: %d.", signal); 4407 m_private_state_control_wait.WaitForValueEqualTo (true, &timeout_time, &timed_out); 4408 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4409 4410 if (signal == eBroadcastInternalStateControlStop) 4411 { 4412 if (timed_out) 4413 { 4414 Error error = private_state_thread.Cancel(); 4415 if (log) 4416 log->Printf ("Timed out responding to the control event, cancel got error: \"%s\".", error.AsCString()); 4417 } 4418 else 4419 { 4420 if (log) 4421 log->Printf ("The control event killed the private state thread without having to cancel."); 4422 } 4423 4424 thread_result_t result = NULL; 4425 private_state_thread.Join(&result); 4426 m_private_state_thread.Reset(); 4427 } 4428 } 4429 else 4430 { 4431 if (log) 4432 log->Printf ("Private state thread already dead, no need to signal it to stop."); 4433 } 4434 } 4435 4436 void 4437 Process::SendAsyncInterrupt () 4438 { 4439 if (PrivateStateThreadIsValid()) 4440 m_private_state_broadcaster.BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4441 else 4442 BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4443 } 4444 4445 void 4446 Process::HandlePrivateEvent (EventSP &event_sp) 4447 { 4448 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4449 m_resume_requested = false; 4450 4451 m_currently_handling_event.SetValue(true, eBroadcastNever); 4452 4453 const StateType new_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4454 4455 // First check to see if anybody wants a shot at this event: 4456 if (m_next_event_action_ap.get() != NULL) 4457 { 4458 NextEventAction::EventActionResult action_result = m_next_event_action_ap->PerformAction(event_sp); 4459 if (log) 4460 log->Printf ("Ran next event action, result was %d.", action_result); 4461 4462 switch (action_result) 4463 { 4464 case NextEventAction::eEventActionSuccess: 4465 SetNextEventAction(NULL); 4466 break; 4467 4468 case NextEventAction::eEventActionRetry: 4469 break; 4470 4471 case NextEventAction::eEventActionExit: 4472 // Handle Exiting Here. If we already got an exited event, 4473 // we should just propagate it. Otherwise, swallow this event, 4474 // and set our state to exit so the next event will kill us. 4475 if (new_state != eStateExited) 4476 { 4477 // FIXME: should cons up an exited event, and discard this one. 4478 SetExitStatus(0, m_next_event_action_ap->GetExitString()); 4479 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4480 SetNextEventAction(NULL); 4481 return; 4482 } 4483 SetNextEventAction(NULL); 4484 break; 4485 } 4486 } 4487 4488 // See if we should broadcast this state to external clients? 4489 const bool should_broadcast = ShouldBroadcastEvent (event_sp.get()); 4490 4491 if (should_broadcast) 4492 { 4493 const bool is_hijacked = IsHijackedForEvent(eBroadcastBitStateChanged); 4494 if (log) 4495 { 4496 log->Printf ("Process::%s (pid = %" PRIu64 ") broadcasting new state %s (old state %s) to %s", 4497 __FUNCTION__, 4498 GetID(), 4499 StateAsCString(new_state), 4500 StateAsCString (GetState ()), 4501 is_hijacked ? "hijacked" : "public"); 4502 } 4503 Process::ProcessEventData::SetUpdateStateOnRemoval(event_sp.get()); 4504 if (StateIsRunningState (new_state)) 4505 { 4506 // Only push the input handler if we aren't fowarding events, 4507 // as this means the curses GUI is in use... 4508 // Or don't push it if we are launching since it will come up stopped. 4509 if (!GetTarget().GetDebugger().IsForwardingEvents() && new_state != eStateLaunching && 4510 new_state != eStateAttaching) 4511 { 4512 PushProcessIOHandler (); 4513 m_iohandler_sync.SetValue(m_iohandler_sync.GetValue()+1, eBroadcastAlways); 4514 if (log) 4515 log->Printf("Process::%s updated m_iohandler_sync to %d", __FUNCTION__, m_iohandler_sync.GetValue()); 4516 } 4517 } 4518 else if (StateIsStoppedState(new_state, false)) 4519 { 4520 if (!Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 4521 { 4522 // If the lldb_private::Debugger is handling the events, we don't 4523 // want to pop the process IOHandler here, we want to do it when 4524 // we receive the stopped event so we can carefully control when 4525 // the process IOHandler is popped because when we stop we want to 4526 // display some text stating how and why we stopped, then maybe some 4527 // process/thread/frame info, and then we want the "(lldb) " prompt 4528 // to show up. If we pop the process IOHandler here, then we will 4529 // cause the command interpreter to become the top IOHandler after 4530 // the process pops off and it will update its prompt right away... 4531 // See the Debugger.cpp file where it calls the function as 4532 // "process_sp->PopProcessIOHandler()" to see where I am talking about. 4533 // Otherwise we end up getting overlapping "(lldb) " prompts and 4534 // garbled output. 4535 // 4536 // If we aren't handling the events in the debugger (which is indicated 4537 // by "m_target.GetDebugger().IsHandlingEvents()" returning false) or we 4538 // are hijacked, then we always pop the process IO handler manually. 4539 // Hijacking happens when the internal process state thread is running 4540 // thread plans, or when commands want to run in synchronous mode 4541 // and they call "process->WaitForProcessToStop()". An example of something 4542 // that will hijack the events is a simple expression: 4543 // 4544 // (lldb) expr (int)puts("hello") 4545 // 4546 // This will cause the internal process state thread to resume and halt 4547 // the process (and _it_ will hijack the eBroadcastBitStateChanged 4548 // events) and we do need the IO handler to be pushed and popped 4549 // correctly. 4550 4551 if (is_hijacked || GetTarget().GetDebugger().IsHandlingEvents() == false) 4552 PopProcessIOHandler (); 4553 } 4554 } 4555 4556 BroadcastEvent (event_sp); 4557 } 4558 else 4559 { 4560 if (log) 4561 { 4562 log->Printf ("Process::%s (pid = %" PRIu64 ") suppressing state %s (old state %s): should_broadcast == false", 4563 __FUNCTION__, 4564 GetID(), 4565 StateAsCString(new_state), 4566 StateAsCString (GetState ())); 4567 } 4568 } 4569 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4570 } 4571 4572 thread_result_t 4573 Process::PrivateStateThread (void *arg) 4574 { 4575 PrivateStateThreadArgs *real_args = static_cast<PrivateStateThreadArgs *> (arg); 4576 thread_result_t result = real_args->process->RunPrivateStateThread(real_args->is_secondary_thread); 4577 return result; 4578 } 4579 4580 thread_result_t 4581 Process::RunPrivateStateThread (bool is_secondary_thread) 4582 { 4583 bool control_only = true; 4584 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4585 4586 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4587 if (log) 4588 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread starting...", 4589 __FUNCTION__, static_cast<void*>(this), GetID()); 4590 4591 bool exit_now = false; 4592 while (!exit_now) 4593 { 4594 EventSP event_sp; 4595 WaitForEventsPrivate (NULL, event_sp, control_only); 4596 if (event_sp->BroadcasterIs(&m_private_state_control_broadcaster)) 4597 { 4598 if (log) 4599 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") got a control event: %d", 4600 __FUNCTION__, static_cast<void*>(this), GetID(), 4601 event_sp->GetType()); 4602 4603 switch (event_sp->GetType()) 4604 { 4605 case eBroadcastInternalStateControlStop: 4606 exit_now = true; 4607 break; // doing any internal state management below 4608 4609 case eBroadcastInternalStateControlPause: 4610 control_only = true; 4611 break; 4612 4613 case eBroadcastInternalStateControlResume: 4614 control_only = false; 4615 break; 4616 } 4617 4618 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4619 continue; 4620 } 4621 else if (event_sp->GetType() == eBroadcastBitInterrupt) 4622 { 4623 if (m_public_state.GetValue() == eStateAttaching) 4624 { 4625 if (log) 4626 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt while attaching - forwarding interrupt.", 4627 __FUNCTION__, static_cast<void*>(this), 4628 GetID()); 4629 BroadcastEvent (eBroadcastBitInterrupt, NULL); 4630 } 4631 else 4632 { 4633 if (log) 4634 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt - Halting.", 4635 __FUNCTION__, static_cast<void*>(this), 4636 GetID()); 4637 Halt(); 4638 } 4639 continue; 4640 } 4641 4642 const StateType internal_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4643 4644 if (internal_state != eStateInvalid) 4645 { 4646 if (m_clear_thread_plans_on_stop && 4647 StateIsStoppedState(internal_state, true)) 4648 { 4649 m_clear_thread_plans_on_stop = false; 4650 m_thread_list.DiscardThreadPlans(); 4651 } 4652 HandlePrivateEvent (event_sp); 4653 } 4654 4655 if (internal_state == eStateInvalid || 4656 internal_state == eStateExited || 4657 internal_state == eStateDetached ) 4658 { 4659 if (log) 4660 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") about to exit with internal state %s...", 4661 __FUNCTION__, static_cast<void*>(this), GetID(), 4662 StateAsCString(internal_state)); 4663 4664 break; 4665 } 4666 } 4667 4668 // Verify log is still enabled before attempting to write to it... 4669 if (log) 4670 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", 4671 __FUNCTION__, static_cast<void*>(this), GetID()); 4672 4673 // If we are a secondary thread, then the primary thread we are working for will have already 4674 // acquired the public_run_lock, and isn't done with what it was doing yet, so don't 4675 // try to change it on the way out. 4676 if (!is_secondary_thread) 4677 m_public_run_lock.SetStopped(); 4678 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4679 m_private_state_thread.Reset(); 4680 return NULL; 4681 } 4682 4683 //------------------------------------------------------------------ 4684 // Process Event Data 4685 //------------------------------------------------------------------ 4686 4687 Process::ProcessEventData::ProcessEventData () : 4688 EventData (), 4689 m_process_wp (), 4690 m_state (eStateInvalid), 4691 m_restarted (false), 4692 m_update_state (0), 4693 m_interrupted (false) 4694 { 4695 } 4696 4697 Process::ProcessEventData::ProcessEventData (const ProcessSP &process_sp, StateType state) : 4698 EventData (), 4699 m_process_wp (), 4700 m_state (state), 4701 m_restarted (false), 4702 m_update_state (0), 4703 m_interrupted (false) 4704 { 4705 if (process_sp) 4706 m_process_wp = process_sp; 4707 } 4708 4709 Process::ProcessEventData::~ProcessEventData() 4710 { 4711 } 4712 4713 const ConstString & 4714 Process::ProcessEventData::GetFlavorString () 4715 { 4716 static ConstString g_flavor ("Process::ProcessEventData"); 4717 return g_flavor; 4718 } 4719 4720 const ConstString & 4721 Process::ProcessEventData::GetFlavor () const 4722 { 4723 return ProcessEventData::GetFlavorString (); 4724 } 4725 4726 void 4727 Process::ProcessEventData::DoOnRemoval (Event *event_ptr) 4728 { 4729 ProcessSP process_sp(m_process_wp.lock()); 4730 4731 if (!process_sp) 4732 return; 4733 4734 // This function gets called twice for each event, once when the event gets pulled 4735 // off of the private process event queue, and then any number of times, first when it gets pulled off of 4736 // the public event queue, then other times when we're pretending that this is where we stopped at the 4737 // end of expression evaluation. m_update_state is used to distinguish these 4738 // three cases; it is 0 when we're just pulling it off for private handling, 4739 // and > 1 for expression evaluation, and we don't want to do the breakpoint command handling then. 4740 if (m_update_state != 1) 4741 return; 4742 4743 process_sp->SetPublicState (m_state, Process::ProcessEventData::GetRestartedFromEvent(event_ptr)); 4744 4745 // If this is a halt event, even if the halt stopped with some reason other than a plain interrupt (e.g. we had 4746 // already stopped for a breakpoint when the halt request came through) don't do the StopInfo actions, as they may 4747 // end up restarting the process. 4748 if (m_interrupted) 4749 return; 4750 4751 // If we're stopped and haven't restarted, then do the StopInfo actions here: 4752 if (m_state == eStateStopped && ! m_restarted) 4753 { 4754 // Let process subclasses know we are about to do a public stop and 4755 // do anything they might need to in order to speed up register and 4756 // memory accesses. 4757 process_sp->WillPublicStop(); 4758 4759 ThreadList &curr_thread_list = process_sp->GetThreadList(); 4760 uint32_t num_threads = curr_thread_list.GetSize(); 4761 uint32_t idx; 4762 4763 // The actions might change one of the thread's stop_info's opinions about whether we should 4764 // stop the process, so we need to query that as we go. 4765 4766 // One other complication here, is that we try to catch any case where the target has run (except for expressions) 4767 // and immediately exit, but if we get that wrong (which is possible) then the thread list might have changed, and 4768 // that would cause our iteration here to crash. We could make a copy of the thread list, but we'd really like 4769 // 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 4770 // against this list & bag out if anything differs. 4771 std::vector<uint32_t> thread_index_array(num_threads); 4772 for (idx = 0; idx < num_threads; ++idx) 4773 thread_index_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetIndexID(); 4774 4775 // Use this to track whether we should continue from here. We will only continue the target running if 4776 // no thread says we should stop. Of course if some thread's PerformAction actually sets the target running, 4777 // then it doesn't matter what the other threads say... 4778 4779 bool still_should_stop = false; 4780 4781 // Sometimes - for instance if we have a bug in the stub we are talking to, we stop but no thread has a 4782 // valid stop reason. In that case we should just stop, because we have no way of telling what the right 4783 // thing to do is, and it's better to let the user decide than continue behind their backs. 4784 4785 bool does_anybody_have_an_opinion = false; 4786 4787 for (idx = 0; idx < num_threads; ++idx) 4788 { 4789 curr_thread_list = process_sp->GetThreadList(); 4790 if (curr_thread_list.GetSize() != num_threads) 4791 { 4792 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4793 if (log) 4794 log->Printf("Number of threads changed from %u to %u while processing event.", num_threads, curr_thread_list.GetSize()); 4795 break; 4796 } 4797 4798 lldb::ThreadSP thread_sp = curr_thread_list.GetThreadAtIndex(idx); 4799 4800 if (thread_sp->GetIndexID() != thread_index_array[idx]) 4801 { 4802 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4803 if (log) 4804 log->Printf("The thread at position %u changed from %u to %u while processing event.", 4805 idx, 4806 thread_index_array[idx], 4807 thread_sp->GetIndexID()); 4808 break; 4809 } 4810 4811 StopInfoSP stop_info_sp = thread_sp->GetStopInfo (); 4812 if (stop_info_sp && stop_info_sp->IsValid()) 4813 { 4814 does_anybody_have_an_opinion = true; 4815 bool this_thread_wants_to_stop; 4816 if (stop_info_sp->GetOverrideShouldStop()) 4817 { 4818 this_thread_wants_to_stop = stop_info_sp->GetOverriddenShouldStopValue(); 4819 } 4820 else 4821 { 4822 stop_info_sp->PerformAction(event_ptr); 4823 // The stop action might restart the target. If it does, then we want to mark that in the 4824 // event so that whoever is receiving it will know to wait for the running event and reflect 4825 // that state appropriately. 4826 // We also need to stop processing actions, since they aren't expecting the target to be running. 4827 4828 // FIXME: we might have run. 4829 if (stop_info_sp->HasTargetRunSinceMe()) 4830 { 4831 SetRestarted (true); 4832 break; 4833 } 4834 4835 this_thread_wants_to_stop = stop_info_sp->ShouldStop(event_ptr); 4836 } 4837 4838 if (still_should_stop == false) 4839 still_should_stop = this_thread_wants_to_stop; 4840 } 4841 } 4842 4843 4844 if (!GetRestarted()) 4845 { 4846 if (!still_should_stop && does_anybody_have_an_opinion) 4847 { 4848 // We've been asked to continue, so do that here. 4849 SetRestarted(true); 4850 // Use the public resume method here, since this is just 4851 // extending a public resume. 4852 process_sp->PrivateResume(); 4853 } 4854 else 4855 { 4856 // If we didn't restart, run the Stop Hooks here: 4857 // They might also restart the target, so watch for that. 4858 process_sp->GetTarget().RunStopHooks(); 4859 if (process_sp->GetPrivateState() == eStateRunning) 4860 SetRestarted(true); 4861 } 4862 } 4863 } 4864 } 4865 4866 void 4867 Process::ProcessEventData::Dump (Stream *s) const 4868 { 4869 ProcessSP process_sp(m_process_wp.lock()); 4870 4871 if (process_sp) 4872 s->Printf(" process = %p (pid = %" PRIu64 "), ", 4873 static_cast<void*>(process_sp.get()), process_sp->GetID()); 4874 else 4875 s->PutCString(" process = NULL, "); 4876 4877 s->Printf("state = %s", StateAsCString(GetState())); 4878 } 4879 4880 const Process::ProcessEventData * 4881 Process::ProcessEventData::GetEventDataFromEvent (const Event *event_ptr) 4882 { 4883 if (event_ptr) 4884 { 4885 const EventData *event_data = event_ptr->GetData(); 4886 if (event_data && event_data->GetFlavor() == ProcessEventData::GetFlavorString()) 4887 return static_cast <const ProcessEventData *> (event_ptr->GetData()); 4888 } 4889 return NULL; 4890 } 4891 4892 ProcessSP 4893 Process::ProcessEventData::GetProcessFromEvent (const Event *event_ptr) 4894 { 4895 ProcessSP process_sp; 4896 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4897 if (data) 4898 process_sp = data->GetProcessSP(); 4899 return process_sp; 4900 } 4901 4902 StateType 4903 Process::ProcessEventData::GetStateFromEvent (const Event *event_ptr) 4904 { 4905 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4906 if (data == NULL) 4907 return eStateInvalid; 4908 else 4909 return data->GetState(); 4910 } 4911 4912 bool 4913 Process::ProcessEventData::GetRestartedFromEvent (const Event *event_ptr) 4914 { 4915 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4916 if (data == NULL) 4917 return false; 4918 else 4919 return data->GetRestarted(); 4920 } 4921 4922 void 4923 Process::ProcessEventData::SetRestartedInEvent (Event *event_ptr, bool new_value) 4924 { 4925 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4926 if (data != NULL) 4927 data->SetRestarted(new_value); 4928 } 4929 4930 size_t 4931 Process::ProcessEventData::GetNumRestartedReasons(const Event *event_ptr) 4932 { 4933 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4934 if (data != NULL) 4935 return data->GetNumRestartedReasons(); 4936 else 4937 return 0; 4938 } 4939 4940 const char * 4941 Process::ProcessEventData::GetRestartedReasonAtIndex(const Event *event_ptr, size_t idx) 4942 { 4943 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4944 if (data != NULL) 4945 return data->GetRestartedReasonAtIndex(idx); 4946 else 4947 return NULL; 4948 } 4949 4950 void 4951 Process::ProcessEventData::AddRestartedReason (Event *event_ptr, const char *reason) 4952 { 4953 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4954 if (data != NULL) 4955 data->AddRestartedReason(reason); 4956 } 4957 4958 bool 4959 Process::ProcessEventData::GetInterruptedFromEvent (const Event *event_ptr) 4960 { 4961 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4962 if (data == NULL) 4963 return false; 4964 else 4965 return data->GetInterrupted (); 4966 } 4967 4968 void 4969 Process::ProcessEventData::SetInterruptedInEvent (Event *event_ptr, bool new_value) 4970 { 4971 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4972 if (data != NULL) 4973 data->SetInterrupted(new_value); 4974 } 4975 4976 bool 4977 Process::ProcessEventData::SetUpdateStateOnRemoval (Event *event_ptr) 4978 { 4979 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4980 if (data) 4981 { 4982 data->SetUpdateStateOnRemoval(); 4983 return true; 4984 } 4985 return false; 4986 } 4987 4988 lldb::TargetSP 4989 Process::CalculateTarget () 4990 { 4991 return m_target_sp.lock(); 4992 } 4993 4994 void 4995 Process::CalculateExecutionContext (ExecutionContext &exe_ctx) 4996 { 4997 exe_ctx.SetTargetPtr (&GetTarget()); 4998 exe_ctx.SetProcessPtr (this); 4999 exe_ctx.SetThreadPtr(NULL); 5000 exe_ctx.SetFramePtr (NULL); 5001 } 5002 5003 //uint32_t 5004 //Process::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 5005 //{ 5006 // return 0; 5007 //} 5008 // 5009 //ArchSpec 5010 //Process::GetArchSpecForExistingProcess (lldb::pid_t pid) 5011 //{ 5012 // return Host::GetArchSpecForExistingProcess (pid); 5013 //} 5014 // 5015 //ArchSpec 5016 //Process::GetArchSpecForExistingProcess (const char *process_name) 5017 //{ 5018 // return Host::GetArchSpecForExistingProcess (process_name); 5019 //} 5020 // 5021 void 5022 Process::AppendSTDOUT (const char * s, size_t len) 5023 { 5024 Mutex::Locker locker (m_stdio_communication_mutex); 5025 m_stdout_data.append (s, len); 5026 BroadcastEventIfUnique (eBroadcastBitSTDOUT, new ProcessEventData (shared_from_this(), GetState())); 5027 } 5028 5029 void 5030 Process::AppendSTDERR (const char * s, size_t len) 5031 { 5032 Mutex::Locker locker (m_stdio_communication_mutex); 5033 m_stderr_data.append (s, len); 5034 BroadcastEventIfUnique (eBroadcastBitSTDERR, new ProcessEventData (shared_from_this(), GetState())); 5035 } 5036 5037 void 5038 Process::BroadcastAsyncProfileData(const std::string &one_profile_data) 5039 { 5040 Mutex::Locker locker (m_profile_data_comm_mutex); 5041 m_profile_data.push_back(one_profile_data); 5042 BroadcastEventIfUnique (eBroadcastBitProfileData, new ProcessEventData (shared_from_this(), GetState())); 5043 } 5044 5045 size_t 5046 Process::GetAsyncProfileData (char *buf, size_t buf_size, Error &error) 5047 { 5048 Mutex::Locker locker(m_profile_data_comm_mutex); 5049 if (m_profile_data.empty()) 5050 return 0; 5051 5052 std::string &one_profile_data = m_profile_data.front(); 5053 size_t bytes_available = one_profile_data.size(); 5054 if (bytes_available > 0) 5055 { 5056 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5057 if (log) 5058 log->Printf ("Process::GetProfileData (buf = %p, size = %" PRIu64 ")", 5059 static_cast<void*>(buf), 5060 static_cast<uint64_t>(buf_size)); 5061 if (bytes_available > buf_size) 5062 { 5063 memcpy(buf, one_profile_data.c_str(), buf_size); 5064 one_profile_data.erase(0, buf_size); 5065 bytes_available = buf_size; 5066 } 5067 else 5068 { 5069 memcpy(buf, one_profile_data.c_str(), bytes_available); 5070 m_profile_data.erase(m_profile_data.begin()); 5071 } 5072 } 5073 return bytes_available; 5074 } 5075 5076 5077 //------------------------------------------------------------------ 5078 // Process STDIO 5079 //------------------------------------------------------------------ 5080 5081 size_t 5082 Process::GetSTDOUT (char *buf, size_t buf_size, Error &error) 5083 { 5084 Mutex::Locker locker(m_stdio_communication_mutex); 5085 size_t bytes_available = m_stdout_data.size(); 5086 if (bytes_available > 0) 5087 { 5088 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5089 if (log) 5090 log->Printf ("Process::GetSTDOUT (buf = %p, size = %" PRIu64 ")", 5091 static_cast<void*>(buf), 5092 static_cast<uint64_t>(buf_size)); 5093 if (bytes_available > buf_size) 5094 { 5095 memcpy(buf, m_stdout_data.c_str(), buf_size); 5096 m_stdout_data.erase(0, buf_size); 5097 bytes_available = buf_size; 5098 } 5099 else 5100 { 5101 memcpy(buf, m_stdout_data.c_str(), bytes_available); 5102 m_stdout_data.clear(); 5103 } 5104 } 5105 return bytes_available; 5106 } 5107 5108 5109 size_t 5110 Process::GetSTDERR (char *buf, size_t buf_size, Error &error) 5111 { 5112 Mutex::Locker locker(m_stdio_communication_mutex); 5113 size_t bytes_available = m_stderr_data.size(); 5114 if (bytes_available > 0) 5115 { 5116 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5117 if (log) 5118 log->Printf ("Process::GetSTDERR (buf = %p, size = %" PRIu64 ")", 5119 static_cast<void*>(buf), 5120 static_cast<uint64_t>(buf_size)); 5121 if (bytes_available > buf_size) 5122 { 5123 memcpy(buf, m_stderr_data.c_str(), buf_size); 5124 m_stderr_data.erase(0, buf_size); 5125 bytes_available = buf_size; 5126 } 5127 else 5128 { 5129 memcpy(buf, m_stderr_data.c_str(), bytes_available); 5130 m_stderr_data.clear(); 5131 } 5132 } 5133 return bytes_available; 5134 } 5135 5136 void 5137 Process::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len) 5138 { 5139 Process *process = (Process *) baton; 5140 process->AppendSTDOUT (static_cast<const char *>(src), src_len); 5141 } 5142 5143 class IOHandlerProcessSTDIO : 5144 public IOHandler 5145 { 5146 public: 5147 IOHandlerProcessSTDIO (Process *process, 5148 int write_fd) : 5149 IOHandler(process->GetTarget().GetDebugger(), IOHandler::Type::ProcessIO), 5150 m_process (process), 5151 m_read_file (), 5152 m_write_file (write_fd, false), 5153 m_pipe () 5154 { 5155 m_pipe.CreateNew(false); 5156 m_read_file.SetDescriptor(GetInputFD(), false); 5157 } 5158 5159 virtual 5160 ~IOHandlerProcessSTDIO () 5161 { 5162 5163 } 5164 5165 // Each IOHandler gets to run until it is done. It should read data 5166 // from the "in" and place output into "out" and "err and return 5167 // when done. 5168 void 5169 Run () override 5170 { 5171 if (!m_read_file.IsValid() || !m_write_file.IsValid() || !m_pipe.CanRead() || !m_pipe.CanWrite()) 5172 { 5173 SetIsDone(true); 5174 return; 5175 } 5176 5177 SetIsDone(false); 5178 const int read_fd = m_read_file.GetDescriptor(); 5179 TerminalState terminal_state; 5180 terminal_state.Save (read_fd, false); 5181 Terminal terminal(read_fd); 5182 terminal.SetCanonical(false); 5183 terminal.SetEcho(false); 5184 // FD_ZERO, FD_SET are not supported on windows 5185 #ifndef _WIN32 5186 const int pipe_read_fd = m_pipe.GetReadFileDescriptor(); 5187 while (!GetIsDone()) 5188 { 5189 fd_set read_fdset; 5190 FD_ZERO (&read_fdset); 5191 FD_SET (read_fd, &read_fdset); 5192 FD_SET (pipe_read_fd, &read_fdset); 5193 const int nfds = std::max<int>(read_fd, pipe_read_fd) + 1; 5194 int num_set_fds = select (nfds, &read_fdset, NULL, NULL, NULL); 5195 if (num_set_fds < 0) 5196 { 5197 const int select_errno = errno; 5198 5199 if (select_errno != EINTR) 5200 SetIsDone(true); 5201 } 5202 else if (num_set_fds > 0) 5203 { 5204 char ch = 0; 5205 size_t n; 5206 if (FD_ISSET (read_fd, &read_fdset)) 5207 { 5208 n = 1; 5209 if (m_read_file.Read(&ch, n).Success() && n == 1) 5210 { 5211 if (m_write_file.Write(&ch, n).Fail() || n != 1) 5212 SetIsDone(true); 5213 } 5214 else 5215 SetIsDone(true); 5216 } 5217 if (FD_ISSET (pipe_read_fd, &read_fdset)) 5218 { 5219 size_t bytes_read; 5220 // Consume the interrupt byte 5221 Error error = m_pipe.Read(&ch, 1, bytes_read); 5222 if (error.Success()) 5223 { 5224 switch (ch) 5225 { 5226 case 'q': 5227 SetIsDone(true); 5228 break; 5229 case 'i': 5230 if (StateIsRunningState(m_process->GetState())) 5231 m_process->Halt(); 5232 break; 5233 } 5234 } 5235 } 5236 } 5237 } 5238 #endif 5239 terminal_state.Restore(); 5240 } 5241 5242 void 5243 Cancel () override 5244 { 5245 char ch = 'q'; // Send 'q' for quit 5246 size_t bytes_written = 0; 5247 m_pipe.Write(&ch, 1, bytes_written); 5248 } 5249 5250 bool 5251 Interrupt () override 5252 { 5253 // Do only things that are safe to do in an interrupt context (like in 5254 // a SIGINT handler), like write 1 byte to a file descriptor. This will 5255 // interrupt the IOHandlerProcessSTDIO::Run() and we can look at the byte 5256 // that was written to the pipe and then call m_process->Halt() from a 5257 // much safer location in code. 5258 if (m_active) 5259 { 5260 char ch = 'i'; // Send 'i' for interrupt 5261 size_t bytes_written = 0; 5262 Error result = m_pipe.Write(&ch, 1, bytes_written); 5263 return result.Success(); 5264 } 5265 else 5266 { 5267 // This IOHandler might be pushed on the stack, but not being run currently 5268 // so do the right thing if we aren't actively watching for STDIN by sending 5269 // the interrupt to the process. Otherwise the write to the pipe above would 5270 // do nothing. This can happen when the command interpreter is running and 5271 // gets a "expression ...". It will be on the IOHandler thread and sending 5272 // the input is complete to the delegate which will cause the expression to 5273 // run, which will push the process IO handler, but not run it. 5274 5275 if (StateIsRunningState(m_process->GetState())) 5276 { 5277 m_process->SendAsyncInterrupt(); 5278 return true; 5279 } 5280 } 5281 return false; 5282 } 5283 5284 void 5285 GotEOF() override 5286 { 5287 5288 } 5289 5290 protected: 5291 Process *m_process; 5292 File m_read_file; // Read from this file (usually actual STDIN for LLDB 5293 File m_write_file; // Write to this file (usually the master pty for getting io to debuggee) 5294 Pipe m_pipe; 5295 }; 5296 5297 void 5298 Process::SetSTDIOFileDescriptor (int fd) 5299 { 5300 // First set up the Read Thread for reading/handling process I/O 5301 5302 std::unique_ptr<ConnectionFileDescriptor> conn_ap (new ConnectionFileDescriptor (fd, true)); 5303 5304 if (conn_ap.get()) 5305 { 5306 m_stdio_communication.SetConnection (conn_ap.release()); 5307 if (m_stdio_communication.IsConnected()) 5308 { 5309 m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this); 5310 m_stdio_communication.StartReadThread(); 5311 5312 // Now read thread is set up, set up input reader. 5313 5314 if (!m_process_input_reader.get()) 5315 m_process_input_reader.reset (new IOHandlerProcessSTDIO (this, fd)); 5316 } 5317 } 5318 } 5319 5320 bool 5321 Process::ProcessIOHandlerIsActive () 5322 { 5323 IOHandlerSP io_handler_sp (m_process_input_reader); 5324 if (io_handler_sp) 5325 return GetTarget().GetDebugger().IsTopIOHandler (io_handler_sp); 5326 return false; 5327 } 5328 bool 5329 Process::PushProcessIOHandler () 5330 { 5331 IOHandlerSP io_handler_sp (m_process_input_reader); 5332 if (io_handler_sp) 5333 { 5334 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5335 if (log) 5336 log->Printf("Process::%s pushing IO handler", __FUNCTION__); 5337 5338 io_handler_sp->SetIsDone(false); 5339 GetTarget().GetDebugger().PushIOHandler (io_handler_sp); 5340 return true; 5341 } 5342 return false; 5343 } 5344 5345 bool 5346 Process::PopProcessIOHandler () 5347 { 5348 IOHandlerSP io_handler_sp (m_process_input_reader); 5349 if (io_handler_sp) 5350 return GetTarget().GetDebugger().PopIOHandler (io_handler_sp); 5351 return false; 5352 } 5353 5354 // The process needs to know about installed plug-ins 5355 void 5356 Process::SettingsInitialize () 5357 { 5358 Thread::SettingsInitialize (); 5359 } 5360 5361 void 5362 Process::SettingsTerminate () 5363 { 5364 Thread::SettingsTerminate (); 5365 } 5366 5367 ExpressionResults 5368 Process::RunThreadPlan (ExecutionContext &exe_ctx, 5369 lldb::ThreadPlanSP &thread_plan_sp, 5370 const EvaluateExpressionOptions &options, 5371 Stream &errors) 5372 { 5373 ExpressionResults return_value = eExpressionSetupError; 5374 5375 if (thread_plan_sp.get() == NULL) 5376 { 5377 errors.Printf("RunThreadPlan called with empty thread plan."); 5378 return eExpressionSetupError; 5379 } 5380 5381 if (!thread_plan_sp->ValidatePlan(NULL)) 5382 { 5383 errors.Printf ("RunThreadPlan called with an invalid thread plan."); 5384 return eExpressionSetupError; 5385 } 5386 5387 if (exe_ctx.GetProcessPtr() != this) 5388 { 5389 errors.Printf("RunThreadPlan called on wrong process."); 5390 return eExpressionSetupError; 5391 } 5392 5393 Thread *thread = exe_ctx.GetThreadPtr(); 5394 if (thread == NULL) 5395 { 5396 errors.Printf("RunThreadPlan called with invalid thread."); 5397 return eExpressionSetupError; 5398 } 5399 5400 // We rely on the thread plan we are running returning "PlanCompleted" if when it successfully completes. 5401 // For that to be true the plan can't be private - since private plans suppress themselves in the 5402 // GetCompletedPlan call. 5403 5404 bool orig_plan_private = thread_plan_sp->GetPrivate(); 5405 thread_plan_sp->SetPrivate(false); 5406 5407 if (m_private_state.GetValue() != eStateStopped) 5408 { 5409 errors.Printf ("RunThreadPlan called while the private state was not stopped."); 5410 return eExpressionSetupError; 5411 } 5412 5413 // Save the thread & frame from the exe_ctx for restoration after we run 5414 const uint32_t thread_idx_id = thread->GetIndexID(); 5415 StackFrameSP selected_frame_sp = thread->GetSelectedFrame(); 5416 if (!selected_frame_sp) 5417 { 5418 thread->SetSelectedFrame(0); 5419 selected_frame_sp = thread->GetSelectedFrame(); 5420 if (!selected_frame_sp) 5421 { 5422 errors.Printf("RunThreadPlan called without a selected frame on thread %d", thread_idx_id); 5423 return eExpressionSetupError; 5424 } 5425 } 5426 5427 StackID ctx_frame_id = selected_frame_sp->GetStackID(); 5428 5429 // N.B. Running the target may unset the currently selected thread and frame. We don't want to do that either, 5430 // so we should arrange to reset them as well. 5431 5432 lldb::ThreadSP selected_thread_sp = GetThreadList().GetSelectedThread(); 5433 5434 uint32_t selected_tid; 5435 StackID selected_stack_id; 5436 if (selected_thread_sp) 5437 { 5438 selected_tid = selected_thread_sp->GetIndexID(); 5439 selected_stack_id = selected_thread_sp->GetSelectedFrame()->GetStackID(); 5440 } 5441 else 5442 { 5443 selected_tid = LLDB_INVALID_THREAD_ID; 5444 } 5445 5446 HostThread backup_private_state_thread; 5447 lldb::StateType old_state = eStateInvalid; 5448 lldb::ThreadPlanSP stopper_base_plan_sp; 5449 5450 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 5451 if (m_private_state_thread.EqualsThread(Host::GetCurrentThread())) 5452 { 5453 // Yikes, we are running on the private state thread! So we can't wait for public events on this thread, since 5454 // we are the thread that is generating public events. 5455 // The simplest thing to do is to spin up a temporary thread to handle private state thread events while 5456 // we are fielding public events here. 5457 if (log) 5458 log->Printf ("Running thread plan on private state thread, spinning up another state thread to handle the events."); 5459 5460 backup_private_state_thread = m_private_state_thread; 5461 5462 // One other bit of business: we want to run just this thread plan and anything it pushes, and then stop, 5463 // returning control here. 5464 // But in the normal course of things, the plan above us on the stack would be given a shot at the stop 5465 // event before deciding to stop, and we don't want that. So we insert a "stopper" base plan on the stack 5466 // before the plan we want to run. Since base plans always stop and return control to the user, that will 5467 // do just what we want. 5468 stopper_base_plan_sp.reset(new ThreadPlanBase (*thread)); 5469 thread->QueueThreadPlan (stopper_base_plan_sp, false); 5470 // Have to make sure our public state is stopped, since otherwise the reporting logic below doesn't work correctly. 5471 old_state = m_public_state.GetValue(); 5472 m_public_state.SetValueNoLock(eStateStopped); 5473 5474 // Now spin up the private state thread: 5475 StartPrivateStateThread(true); 5476 } 5477 5478 thread->QueueThreadPlan(thread_plan_sp, false); // This used to pass "true" does that make sense? 5479 5480 if (options.GetDebug()) 5481 { 5482 // In this case, we aren't actually going to run, we just want to stop right away. 5483 // Flush this thread so we will refetch the stacks and show the correct backtrace. 5484 // FIXME: To make this prettier we should invent some stop reason for this, but that 5485 // is only cosmetic, and this functionality is only of use to lldb developers who can 5486 // live with not pretty... 5487 thread->Flush(); 5488 return eExpressionStoppedForDebug; 5489 } 5490 5491 Listener listener("lldb.process.listener.run-thread-plan"); 5492 5493 lldb::EventSP event_to_broadcast_sp; 5494 5495 { 5496 // This process event hijacker Hijacks the Public events and its destructor makes sure that the process events get 5497 // restored on exit to the function. 5498 // 5499 // If the event needs to propagate beyond the hijacker (e.g., the process exits during execution), then the event 5500 // is put into event_to_broadcast_sp for rebroadcasting. 5501 5502 ProcessEventHijacker run_thread_plan_hijacker (*this, &listener); 5503 5504 if (log) 5505 { 5506 StreamString s; 5507 thread_plan_sp->GetDescription(&s, lldb::eDescriptionLevelVerbose); 5508 log->Printf ("Process::RunThreadPlan(): Resuming thread %u - 0x%4.4" PRIx64 " to run thread plan \"%s\".", 5509 thread->GetIndexID(), 5510 thread->GetID(), 5511 s.GetData()); 5512 } 5513 5514 bool got_event; 5515 lldb::EventSP event_sp; 5516 lldb::StateType stop_state = lldb::eStateInvalid; 5517 5518 TimeValue* timeout_ptr = NULL; 5519 TimeValue real_timeout; 5520 5521 bool before_first_timeout = true; // This is set to false the first time that we have to halt the target. 5522 bool do_resume = true; 5523 bool handle_running_event = true; 5524 const uint64_t default_one_thread_timeout_usec = 250000; 5525 5526 // This is just for accounting: 5527 uint32_t num_resumes = 0; 5528 5529 uint32_t timeout_usec = options.GetTimeoutUsec(); 5530 uint32_t one_thread_timeout_usec; 5531 uint32_t all_threads_timeout_usec = 0; 5532 5533 // If we are going to run all threads the whole time, or if we are only going to run one thread, 5534 // then we don't need the first timeout. So we set the final timeout, and pretend we are after the 5535 // first timeout already. 5536 5537 if (!options.GetStopOthers() || !options.GetTryAllThreads()) 5538 { 5539 before_first_timeout = false; 5540 one_thread_timeout_usec = 0; 5541 all_threads_timeout_usec = timeout_usec; 5542 } 5543 else 5544 { 5545 uint32_t option_one_thread_timeout = options.GetOneThreadTimeoutUsec(); 5546 5547 // If the overall wait is forever, then we only need to set the one thread timeout: 5548 if (timeout_usec == 0) 5549 { 5550 if (option_one_thread_timeout != 0) 5551 one_thread_timeout_usec = option_one_thread_timeout; 5552 else 5553 one_thread_timeout_usec = default_one_thread_timeout_usec; 5554 } 5555 else 5556 { 5557 // Otherwise, if the one thread timeout is set, make sure it isn't longer than the overall timeout, 5558 // and use it, otherwise use half the total timeout, bounded by the default_one_thread_timeout_usec. 5559 uint64_t computed_one_thread_timeout; 5560 if (option_one_thread_timeout != 0) 5561 { 5562 if (timeout_usec < option_one_thread_timeout) 5563 { 5564 errors.Printf("RunThreadPlan called without one thread timeout greater than total timeout"); 5565 return eExpressionSetupError; 5566 } 5567 computed_one_thread_timeout = option_one_thread_timeout; 5568 } 5569 else 5570 { 5571 computed_one_thread_timeout = timeout_usec / 2; 5572 if (computed_one_thread_timeout > default_one_thread_timeout_usec) 5573 computed_one_thread_timeout = default_one_thread_timeout_usec; 5574 } 5575 one_thread_timeout_usec = computed_one_thread_timeout; 5576 all_threads_timeout_usec = timeout_usec - one_thread_timeout_usec; 5577 5578 } 5579 } 5580 5581 if (log) 5582 log->Printf ("Stop others: %u, try all: %u, before_first: %u, one thread: %" PRIu32 " - all threads: %" PRIu32 ".\n", 5583 options.GetStopOthers(), 5584 options.GetTryAllThreads(), 5585 before_first_timeout, 5586 one_thread_timeout_usec, 5587 all_threads_timeout_usec); 5588 5589 // This isn't going to work if there are unfetched events on the queue. 5590 // Are there cases where we might want to run the remaining events here, and then try to 5591 // call the function? That's probably being too tricky for our own good. 5592 5593 Event *other_events = listener.PeekAtNextEvent(); 5594 if (other_events != NULL) 5595 { 5596 errors.Printf("Calling RunThreadPlan with pending events on the queue."); 5597 return eExpressionSetupError; 5598 } 5599 5600 // We also need to make sure that the next event is delivered. We might be calling a function as part of 5601 // a thread plan, in which case the last delivered event could be the running event, and we don't want 5602 // event coalescing to cause us to lose OUR running event... 5603 ForceNextEventDelivery(); 5604 5605 // This while loop must exit out the bottom, there's cleanup that we need to do when we are done. 5606 // So don't call return anywhere within it. 5607 5608 #ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT 5609 // It's pretty much impossible to write test cases for things like: 5610 // One thread timeout expires, I go to halt, but the process already stopped 5611 // on the function call stop breakpoint. Turning on this define will make us not 5612 // fetch the first event till after the halt. So if you run a quick function, it will have 5613 // completed, and the completion event will be waiting, when you interrupt for halt. 5614 // The expression evaluation should still succeed. 5615 bool miss_first_event = true; 5616 #endif 5617 TimeValue one_thread_timeout; 5618 TimeValue final_timeout; 5619 5620 5621 while (1) 5622 { 5623 // We usually want to resume the process if we get to the top of the loop. 5624 // The only exception is if we get two running events with no intervening 5625 // stop, which can happen, we will just wait for then next stop event. 5626 if (log) 5627 log->Printf ("Top of while loop: do_resume: %i handle_running_event: %i before_first_timeout: %i.", 5628 do_resume, 5629 handle_running_event, 5630 before_first_timeout); 5631 5632 if (do_resume || handle_running_event) 5633 { 5634 // Do the initial resume and wait for the running event before going further. 5635 5636 if (do_resume) 5637 { 5638 num_resumes++; 5639 Error resume_error = PrivateResume (); 5640 if (!resume_error.Success()) 5641 { 5642 errors.Printf("Error resuming inferior the %d time: \"%s\".\n", 5643 num_resumes, 5644 resume_error.AsCString()); 5645 return_value = eExpressionSetupError; 5646 break; 5647 } 5648 } 5649 5650 TimeValue resume_timeout = TimeValue::Now(); 5651 resume_timeout.OffsetWithMicroSeconds(500000); 5652 5653 got_event = listener.WaitForEvent(&resume_timeout, event_sp); 5654 if (!got_event) 5655 { 5656 if (log) 5657 log->Printf ("Process::RunThreadPlan(): didn't get any event after resume %d, exiting.", 5658 num_resumes); 5659 5660 errors.Printf("Didn't get any event after resume %d, exiting.", num_resumes); 5661 return_value = eExpressionSetupError; 5662 break; 5663 } 5664 5665 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5666 5667 if (stop_state != eStateRunning) 5668 { 5669 bool restarted = false; 5670 5671 if (stop_state == eStateStopped) 5672 { 5673 restarted = Process::ProcessEventData::GetRestartedFromEvent(event_sp.get()); 5674 if (log) 5675 log->Printf("Process::RunThreadPlan(): didn't get running event after " 5676 "resume %d, got %s instead (restarted: %i, do_resume: %i, handle_running_event: %i).", 5677 num_resumes, 5678 StateAsCString(stop_state), 5679 restarted, 5680 do_resume, 5681 handle_running_event); 5682 } 5683 5684 if (restarted) 5685 { 5686 // This is probably an overabundance of caution, I don't think I should ever get a stopped & restarted 5687 // event here. But if I do, the best thing is to Halt and then get out of here. 5688 Halt(); 5689 } 5690 5691 errors.Printf("Didn't get running event after initial resume, got %s instead.", 5692 StateAsCString(stop_state)); 5693 return_value = eExpressionSetupError; 5694 break; 5695 } 5696 5697 if (log) 5698 log->PutCString ("Process::RunThreadPlan(): resuming succeeded."); 5699 // We need to call the function synchronously, so spin waiting for it to return. 5700 // If we get interrupted while executing, we're going to lose our context, and 5701 // won't be able to gather the result at this point. 5702 // We set the timeout AFTER the resume, since the resume takes some time and we 5703 // don't want to charge that to the timeout. 5704 } 5705 else 5706 { 5707 if (log) 5708 log->PutCString ("Process::RunThreadPlan(): waiting for next event."); 5709 } 5710 5711 if (before_first_timeout) 5712 { 5713 if (options.GetTryAllThreads()) 5714 { 5715 one_thread_timeout = TimeValue::Now(); 5716 one_thread_timeout.OffsetWithMicroSeconds(one_thread_timeout_usec); 5717 timeout_ptr = &one_thread_timeout; 5718 } 5719 else 5720 { 5721 if (timeout_usec == 0) 5722 timeout_ptr = NULL; 5723 else 5724 { 5725 final_timeout = TimeValue::Now(); 5726 final_timeout.OffsetWithMicroSeconds (timeout_usec); 5727 timeout_ptr = &final_timeout; 5728 } 5729 } 5730 } 5731 else 5732 { 5733 if (timeout_usec == 0) 5734 timeout_ptr = NULL; 5735 else 5736 { 5737 final_timeout = TimeValue::Now(); 5738 final_timeout.OffsetWithMicroSeconds (all_threads_timeout_usec); 5739 timeout_ptr = &final_timeout; 5740 } 5741 } 5742 5743 do_resume = true; 5744 handle_running_event = true; 5745 5746 // Now wait for the process to stop again: 5747 event_sp.reset(); 5748 5749 if (log) 5750 { 5751 if (timeout_ptr) 5752 { 5753 log->Printf ("Process::RunThreadPlan(): about to wait - now is %" PRIu64 " - endpoint is %" PRIu64, 5754 TimeValue::Now().GetAsMicroSecondsSinceJan1_1970(), 5755 timeout_ptr->GetAsMicroSecondsSinceJan1_1970()); 5756 } 5757 else 5758 { 5759 log->Printf ("Process::RunThreadPlan(): about to wait forever."); 5760 } 5761 } 5762 5763 #ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT 5764 // See comment above... 5765 if (miss_first_event) 5766 { 5767 usleep(1000); 5768 miss_first_event = false; 5769 got_event = false; 5770 } 5771 else 5772 #endif 5773 got_event = listener.WaitForEvent (timeout_ptr, event_sp); 5774 5775 if (got_event) 5776 { 5777 if (event_sp.get()) 5778 { 5779 bool keep_going = false; 5780 if (event_sp->GetType() == eBroadcastBitInterrupt) 5781 { 5782 Halt(); 5783 return_value = eExpressionInterrupted; 5784 errors.Printf ("Execution halted by user interrupt."); 5785 if (log) 5786 log->Printf ("Process::RunThreadPlan(): Got interrupted by eBroadcastBitInterrupted, exiting."); 5787 break; 5788 } 5789 else 5790 { 5791 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5792 if (log) 5793 log->Printf("Process::RunThreadPlan(): in while loop, got event: %s.", StateAsCString(stop_state)); 5794 5795 switch (stop_state) 5796 { 5797 case lldb::eStateStopped: 5798 { 5799 // We stopped, figure out what we are going to do now. 5800 ThreadSP thread_sp = GetThreadList().FindThreadByIndexID (thread_idx_id); 5801 if (!thread_sp) 5802 { 5803 // Ooh, our thread has vanished. Unlikely that this was successful execution... 5804 if (log) 5805 log->Printf ("Process::RunThreadPlan(): execution completed but our thread (index-id=%u) has vanished.", thread_idx_id); 5806 return_value = eExpressionInterrupted; 5807 } 5808 else 5809 { 5810 // If we were restarted, we just need to go back up to fetch another event. 5811 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5812 { 5813 if (log) 5814 { 5815 log->Printf ("Process::RunThreadPlan(): Got a stop and restart, so we'll continue waiting."); 5816 } 5817 keep_going = true; 5818 do_resume = false; 5819 handle_running_event = true; 5820 5821 } 5822 else 5823 { 5824 StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 5825 StopReason stop_reason = eStopReasonInvalid; 5826 if (stop_info_sp) 5827 stop_reason = stop_info_sp->GetStopReason(); 5828 5829 // FIXME: We only check if the stop reason is plan complete, should we make sure that 5830 // it is OUR plan that is complete? 5831 if (stop_reason == eStopReasonPlanComplete) 5832 { 5833 if (log) 5834 log->PutCString ("Process::RunThreadPlan(): execution completed successfully."); 5835 // Now mark this plan as private so it doesn't get reported as the stop reason 5836 // after this point. 5837 if (thread_plan_sp) 5838 thread_plan_sp->SetPrivate (orig_plan_private); 5839 return_value = eExpressionCompleted; 5840 } 5841 else 5842 { 5843 // Something restarted the target, so just wait for it to stop for real. 5844 if (stop_reason == eStopReasonBreakpoint) 5845 { 5846 if (log) 5847 log->Printf ("Process::RunThreadPlan() stopped for breakpoint: %s.", stop_info_sp->GetDescription()); 5848 return_value = eExpressionHitBreakpoint; 5849 if (!options.DoesIgnoreBreakpoints()) 5850 { 5851 event_to_broadcast_sp = event_sp; 5852 } 5853 } 5854 else 5855 { 5856 if (log) 5857 log->PutCString ("Process::RunThreadPlan(): thread plan didn't successfully complete."); 5858 if (!options.DoesUnwindOnError()) 5859 event_to_broadcast_sp = event_sp; 5860 return_value = eExpressionInterrupted; 5861 } 5862 } 5863 } 5864 } 5865 } 5866 break; 5867 5868 case lldb::eStateRunning: 5869 // This shouldn't really happen, but sometimes we do get two running events without an 5870 // intervening stop, and in that case we should just go back to waiting for the stop. 5871 do_resume = false; 5872 keep_going = true; 5873 handle_running_event = false; 5874 break; 5875 5876 default: 5877 if (log) 5878 log->Printf("Process::RunThreadPlan(): execution stopped with unexpected state: %s.", StateAsCString(stop_state)); 5879 5880 if (stop_state == eStateExited) 5881 event_to_broadcast_sp = event_sp; 5882 5883 errors.Printf ("Execution stopped with unexpected state.\n"); 5884 return_value = eExpressionInterrupted; 5885 break; 5886 } 5887 } 5888 5889 if (keep_going) 5890 continue; 5891 else 5892 break; 5893 } 5894 else 5895 { 5896 if (log) 5897 log->PutCString ("Process::RunThreadPlan(): got_event was true, but the event pointer was null. How odd..."); 5898 return_value = eExpressionInterrupted; 5899 break; 5900 } 5901 } 5902 else 5903 { 5904 // If we didn't get an event that means we've timed out... 5905 // We will interrupt the process here. Depending on what we were asked to do we will 5906 // either exit, or try with all threads running for the same timeout. 5907 5908 if (log) { 5909 if (options.GetTryAllThreads()) 5910 { 5911 if (before_first_timeout) 5912 { 5913 if (timeout_usec != 0) 5914 { 5915 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5916 "running for %" PRIu32 " usec with all threads enabled.", 5917 all_threads_timeout_usec); 5918 } 5919 else 5920 { 5921 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5922 "running forever with all threads enabled."); 5923 } 5924 } 5925 else 5926 log->Printf ("Process::RunThreadPlan(): Restarting function with all threads enabled " 5927 "and timeout: %u timed out, abandoning execution.", 5928 timeout_usec); 5929 } 5930 else 5931 log->Printf ("Process::RunThreadPlan(): Running function with timeout: %u timed out, " 5932 "abandoning execution.", 5933 timeout_usec); 5934 } 5935 5936 // It is possible that between the time we issued the Halt, and we get around to calling Halt the target 5937 // could have stopped. That's fine, Halt will figure that out and send the appropriate Stopped event. 5938 // BUT it is also possible that we stopped & restarted (e.g. hit a signal with "stop" set to false.) In 5939 // that case, we'll get the stopped & restarted event, and we should go back to waiting for the Halt's 5940 // stopped event. That's what this while loop does. 5941 5942 bool back_to_top = true; 5943 uint32_t try_halt_again = 0; 5944 bool do_halt = true; 5945 const uint32_t num_retries = 5; 5946 while (try_halt_again < num_retries) 5947 { 5948 Error halt_error; 5949 if (do_halt) 5950 { 5951 if (log) 5952 log->Printf ("Process::RunThreadPlan(): Running Halt."); 5953 halt_error = Halt(); 5954 } 5955 if (halt_error.Success()) 5956 { 5957 if (log) 5958 log->PutCString ("Process::RunThreadPlan(): Halt succeeded."); 5959 5960 real_timeout = TimeValue::Now(); 5961 real_timeout.OffsetWithMicroSeconds(500000); 5962 5963 got_event = listener.WaitForEvent(&real_timeout, event_sp); 5964 5965 if (got_event) 5966 { 5967 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5968 if (log) 5969 { 5970 log->Printf ("Process::RunThreadPlan(): Stopped with event: %s", StateAsCString(stop_state)); 5971 if (stop_state == lldb::eStateStopped 5972 && Process::ProcessEventData::GetInterruptedFromEvent(event_sp.get())) 5973 log->PutCString (" Event was the Halt interruption event."); 5974 } 5975 5976 if (stop_state == lldb::eStateStopped) 5977 { 5978 // Between the time we initiated the Halt and the time we delivered it, the process could have 5979 // already finished its job. Check that here: 5980 5981 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 5982 { 5983 if (log) 5984 log->PutCString ("Process::RunThreadPlan(): Even though we timed out, the call plan was done. " 5985 "Exiting wait loop."); 5986 return_value = eExpressionCompleted; 5987 back_to_top = false; 5988 break; 5989 } 5990 5991 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5992 { 5993 if (log) 5994 log->PutCString ("Process::RunThreadPlan(): Went to halt but got a restarted event, there must be an un-restarted stopped event so try again... " 5995 "Exiting wait loop."); 5996 try_halt_again++; 5997 do_halt = false; 5998 continue; 5999 } 6000 6001 if (!options.GetTryAllThreads()) 6002 { 6003 if (log) 6004 log->PutCString ("Process::RunThreadPlan(): try_all_threads was false, we stopped so now we're quitting."); 6005 return_value = eExpressionInterrupted; 6006 back_to_top = false; 6007 break; 6008 } 6009 6010 if (before_first_timeout) 6011 { 6012 // Set all the other threads to run, and return to the top of the loop, which will continue; 6013 before_first_timeout = false; 6014 thread_plan_sp->SetStopOthers (false); 6015 if (log) 6016 log->PutCString ("Process::RunThreadPlan(): about to resume."); 6017 6018 back_to_top = true; 6019 break; 6020 } 6021 else 6022 { 6023 // Running all threads failed, so return Interrupted. 6024 if (log) 6025 log->PutCString("Process::RunThreadPlan(): running all threads timed out."); 6026 return_value = eExpressionInterrupted; 6027 back_to_top = false; 6028 break; 6029 } 6030 } 6031 } 6032 else 6033 { if (log) 6034 log->PutCString("Process::RunThreadPlan(): halt said it succeeded, but I got no event. " 6035 "I'm getting out of here passing Interrupted."); 6036 return_value = eExpressionInterrupted; 6037 back_to_top = false; 6038 break; 6039 } 6040 } 6041 else 6042 { 6043 try_halt_again++; 6044 continue; 6045 } 6046 } 6047 6048 if (!back_to_top || try_halt_again > num_retries) 6049 break; 6050 else 6051 continue; 6052 } 6053 } // END WAIT LOOP 6054 6055 // If we had to start up a temporary private state thread to run this thread plan, shut it down now. 6056 if (backup_private_state_thread.IsJoinable()) 6057 { 6058 StopPrivateStateThread(); 6059 Error error; 6060 m_private_state_thread = backup_private_state_thread; 6061 if (stopper_base_plan_sp) 6062 { 6063 thread->DiscardThreadPlansUpToPlan(stopper_base_plan_sp); 6064 } 6065 if (old_state != eStateInvalid) 6066 m_public_state.SetValueNoLock(old_state); 6067 } 6068 6069 // Restore the thread state if we are going to discard the plan execution. There are three cases where this 6070 // could happen: 6071 // 1) The execution successfully completed 6072 // 2) We hit a breakpoint, and ignore_breakpoints was true 6073 // 3) We got some other error, and discard_on_error was true 6074 bool should_unwind = (return_value == eExpressionInterrupted && options.DoesUnwindOnError()) 6075 || (return_value == eExpressionHitBreakpoint && options.DoesIgnoreBreakpoints()); 6076 6077 if (return_value == eExpressionCompleted 6078 || should_unwind) 6079 { 6080 thread_plan_sp->RestoreThreadState(); 6081 } 6082 6083 // Now do some processing on the results of the run: 6084 if (return_value == eExpressionInterrupted || return_value == eExpressionHitBreakpoint) 6085 { 6086 if (log) 6087 { 6088 StreamString s; 6089 if (event_sp) 6090 event_sp->Dump (&s); 6091 else 6092 { 6093 log->PutCString ("Process::RunThreadPlan(): Stop event that interrupted us is NULL."); 6094 } 6095 6096 StreamString ts; 6097 6098 const char *event_explanation = NULL; 6099 6100 do 6101 { 6102 if (!event_sp) 6103 { 6104 event_explanation = "<no event>"; 6105 break; 6106 } 6107 else if (event_sp->GetType() == eBroadcastBitInterrupt) 6108 { 6109 event_explanation = "<user interrupt>"; 6110 break; 6111 } 6112 else 6113 { 6114 const Process::ProcessEventData *event_data = Process::ProcessEventData::GetEventDataFromEvent (event_sp.get()); 6115 6116 if (!event_data) 6117 { 6118 event_explanation = "<no event data>"; 6119 break; 6120 } 6121 6122 Process *process = event_data->GetProcessSP().get(); 6123 6124 if (!process) 6125 { 6126 event_explanation = "<no process>"; 6127 break; 6128 } 6129 6130 ThreadList &thread_list = process->GetThreadList(); 6131 6132 uint32_t num_threads = thread_list.GetSize(); 6133 uint32_t thread_index; 6134 6135 ts.Printf("<%u threads> ", num_threads); 6136 6137 for (thread_index = 0; 6138 thread_index < num_threads; 6139 ++thread_index) 6140 { 6141 Thread *thread = thread_list.GetThreadAtIndex(thread_index).get(); 6142 6143 if (!thread) 6144 { 6145 ts.Printf("<?> "); 6146 continue; 6147 } 6148 6149 ts.Printf("<0x%4.4" PRIx64 " ", thread->GetID()); 6150 RegisterContext *register_context = thread->GetRegisterContext().get(); 6151 6152 if (register_context) 6153 ts.Printf("[ip 0x%" PRIx64 "] ", register_context->GetPC()); 6154 else 6155 ts.Printf("[ip unknown] "); 6156 6157 lldb::StopInfoSP stop_info_sp = thread->GetStopInfo(); 6158 if (stop_info_sp) 6159 { 6160 const char *stop_desc = stop_info_sp->GetDescription(); 6161 if (stop_desc) 6162 ts.PutCString (stop_desc); 6163 } 6164 ts.Printf(">"); 6165 } 6166 6167 event_explanation = ts.GetData(); 6168 } 6169 } while (0); 6170 6171 if (event_explanation) 6172 log->Printf("Process::RunThreadPlan(): execution interrupted: %s %s", s.GetData(), event_explanation); 6173 else 6174 log->Printf("Process::RunThreadPlan(): execution interrupted: %s", s.GetData()); 6175 } 6176 6177 if (should_unwind) 6178 { 6179 if (log) 6180 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - discarding thread plans up to %p.", 6181 static_cast<void*>(thread_plan_sp.get())); 6182 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6183 thread_plan_sp->SetPrivate (orig_plan_private); 6184 } 6185 else 6186 { 6187 if (log) 6188 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - for plan: %p not discarding.", 6189 static_cast<void*>(thread_plan_sp.get())); 6190 } 6191 } 6192 else if (return_value == eExpressionSetupError) 6193 { 6194 if (log) 6195 log->PutCString("Process::RunThreadPlan(): execution set up error."); 6196 6197 if (options.DoesUnwindOnError()) 6198 { 6199 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6200 thread_plan_sp->SetPrivate (orig_plan_private); 6201 } 6202 } 6203 else 6204 { 6205 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 6206 { 6207 if (log) 6208 log->PutCString("Process::RunThreadPlan(): thread plan is done"); 6209 return_value = eExpressionCompleted; 6210 } 6211 else if (thread->WasThreadPlanDiscarded (thread_plan_sp.get())) 6212 { 6213 if (log) 6214 log->PutCString("Process::RunThreadPlan(): thread plan was discarded"); 6215 return_value = eExpressionDiscarded; 6216 } 6217 else 6218 { 6219 if (log) 6220 log->PutCString("Process::RunThreadPlan(): thread plan stopped in mid course"); 6221 if (options.DoesUnwindOnError() && thread_plan_sp) 6222 { 6223 if (log) 6224 log->PutCString("Process::RunThreadPlan(): discarding thread plan 'cause unwind_on_error is set."); 6225 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6226 thread_plan_sp->SetPrivate (orig_plan_private); 6227 } 6228 } 6229 } 6230 6231 // Thread we ran the function in may have gone away because we ran the target 6232 // Check that it's still there, and if it is put it back in the context. Also restore the 6233 // frame in the context if it is still present. 6234 thread = GetThreadList().FindThreadByIndexID(thread_idx_id, true).get(); 6235 if (thread) 6236 { 6237 exe_ctx.SetFrameSP (thread->GetFrameWithStackID (ctx_frame_id)); 6238 } 6239 6240 // Also restore the current process'es selected frame & thread, since this function calling may 6241 // be done behind the user's back. 6242 6243 if (selected_tid != LLDB_INVALID_THREAD_ID) 6244 { 6245 if (GetThreadList().SetSelectedThreadByIndexID (selected_tid) && selected_stack_id.IsValid()) 6246 { 6247 // We were able to restore the selected thread, now restore the frame: 6248 Mutex::Locker lock(GetThreadList().GetMutex()); 6249 StackFrameSP old_frame_sp = GetThreadList().GetSelectedThread()->GetFrameWithStackID(selected_stack_id); 6250 if (old_frame_sp) 6251 GetThreadList().GetSelectedThread()->SetSelectedFrame(old_frame_sp.get()); 6252 } 6253 } 6254 } 6255 6256 // If the process exited during the run of the thread plan, notify everyone. 6257 6258 if (event_to_broadcast_sp) 6259 { 6260 if (log) 6261 log->PutCString("Process::RunThreadPlan(): rebroadcasting event."); 6262 BroadcastEvent(event_to_broadcast_sp); 6263 } 6264 6265 return return_value; 6266 } 6267 6268 const char * 6269 Process::ExecutionResultAsCString (ExpressionResults result) 6270 { 6271 const char *result_name; 6272 6273 switch (result) 6274 { 6275 case eExpressionCompleted: 6276 result_name = "eExpressionCompleted"; 6277 break; 6278 case eExpressionDiscarded: 6279 result_name = "eExpressionDiscarded"; 6280 break; 6281 case eExpressionInterrupted: 6282 result_name = "eExpressionInterrupted"; 6283 break; 6284 case eExpressionHitBreakpoint: 6285 result_name = "eExpressionHitBreakpoint"; 6286 break; 6287 case eExpressionSetupError: 6288 result_name = "eExpressionSetupError"; 6289 break; 6290 case eExpressionParseError: 6291 result_name = "eExpressionParseError"; 6292 break; 6293 case eExpressionResultUnavailable: 6294 result_name = "eExpressionResultUnavailable"; 6295 break; 6296 case eExpressionTimedOut: 6297 result_name = "eExpressionTimedOut"; 6298 break; 6299 case eExpressionStoppedForDebug: 6300 result_name = "eExpressionStoppedForDebug"; 6301 break; 6302 } 6303 return result_name; 6304 } 6305 6306 void 6307 Process::GetStatus (Stream &strm) 6308 { 6309 const StateType state = GetState(); 6310 if (StateIsStoppedState(state, false)) 6311 { 6312 if (state == eStateExited) 6313 { 6314 int exit_status = GetExitStatus(); 6315 const char *exit_description = GetExitDescription(); 6316 strm.Printf ("Process %" PRIu64 " exited with status = %i (0x%8.8x) %s\n", 6317 GetID(), 6318 exit_status, 6319 exit_status, 6320 exit_description ? exit_description : ""); 6321 } 6322 else 6323 { 6324 if (state == eStateConnected) 6325 strm.Printf ("Connected to remote target.\n"); 6326 else 6327 strm.Printf ("Process %" PRIu64 " %s\n", GetID(), StateAsCString (state)); 6328 } 6329 } 6330 else 6331 { 6332 strm.Printf ("Process %" PRIu64 " is running.\n", GetID()); 6333 } 6334 } 6335 6336 size_t 6337 Process::GetThreadStatus (Stream &strm, 6338 bool only_threads_with_stop_reason, 6339 uint32_t start_frame, 6340 uint32_t num_frames, 6341 uint32_t num_frames_with_source) 6342 { 6343 size_t num_thread_infos_dumped = 0; 6344 6345 // You can't hold the thread list lock while calling Thread::GetStatus. That very well might run code (e.g. if we need it 6346 // to get return values or arguments.) For that to work the process has to be able to acquire it. So instead copy the thread 6347 // ID's, and look them up one by one: 6348 6349 uint32_t num_threads; 6350 std::vector<lldb::tid_t> thread_id_array; 6351 //Scope for thread list locker; 6352 { 6353 Mutex::Locker locker (GetThreadList().GetMutex()); 6354 ThreadList &curr_thread_list = GetThreadList(); 6355 num_threads = curr_thread_list.GetSize(); 6356 uint32_t idx; 6357 thread_id_array.resize(num_threads); 6358 for (idx = 0; idx < num_threads; ++idx) 6359 thread_id_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetID(); 6360 } 6361 6362 for (uint32_t i = 0; i < num_threads; i++) 6363 { 6364 ThreadSP thread_sp(GetThreadList().FindThreadByID(thread_id_array[i])); 6365 if (thread_sp) 6366 { 6367 if (only_threads_with_stop_reason) 6368 { 6369 StopInfoSP stop_info_sp = thread_sp->GetStopInfo(); 6370 if (stop_info_sp.get() == NULL || !stop_info_sp->IsValid()) 6371 continue; 6372 } 6373 thread_sp->GetStatus (strm, 6374 start_frame, 6375 num_frames, 6376 num_frames_with_source); 6377 ++num_thread_infos_dumped; 6378 } 6379 else 6380 { 6381 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 6382 if (log) 6383 log->Printf("Process::GetThreadStatus - thread 0x" PRIu64 " vanished while running Thread::GetStatus."); 6384 6385 } 6386 } 6387 return num_thread_infos_dumped; 6388 } 6389 6390 void 6391 Process::AddInvalidMemoryRegion (const LoadRange ®ion) 6392 { 6393 m_memory_cache.AddInvalidRange(region.GetRangeBase(), region.GetByteSize()); 6394 } 6395 6396 bool 6397 Process::RemoveInvalidMemoryRange (const LoadRange ®ion) 6398 { 6399 return m_memory_cache.RemoveInvalidRange(region.GetRangeBase(), region.GetByteSize()); 6400 } 6401 6402 void 6403 Process::AddPreResumeAction (PreResumeActionCallback callback, void *baton) 6404 { 6405 m_pre_resume_actions.push_back(PreResumeCallbackAndBaton (callback, baton)); 6406 } 6407 6408 bool 6409 Process::RunPreResumeActions () 6410 { 6411 bool result = true; 6412 while (!m_pre_resume_actions.empty()) 6413 { 6414 struct PreResumeCallbackAndBaton action = m_pre_resume_actions.back(); 6415 m_pre_resume_actions.pop_back(); 6416 bool this_result = action.callback (action.baton); 6417 if (result == true) 6418 result = this_result; 6419 } 6420 return result; 6421 } 6422 6423 void 6424 Process::ClearPreResumeActions () 6425 { 6426 m_pre_resume_actions.clear(); 6427 } 6428 6429 ProcessRunLock & 6430 Process::GetRunLock() 6431 { 6432 if (m_private_state_thread.EqualsThread(Host::GetCurrentThread())) 6433 return m_private_run_lock; 6434 else 6435 return m_public_run_lock; 6436 } 6437 6438 void 6439 Process::Flush () 6440 { 6441 m_thread_list.Flush(); 6442 m_extended_thread_list.Flush(); 6443 m_extended_thread_stop_id = 0; 6444 m_queue_list.Clear(); 6445 m_queue_list_stop_id = 0; 6446 } 6447 6448 void 6449 Process::DidExec () 6450 { 6451 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 6452 if (log) 6453 log->Printf ("Process::%s()", __FUNCTION__); 6454 6455 Target &target = GetTarget(); 6456 target.CleanupProcess (); 6457 target.ClearModules(false); 6458 m_dynamic_checkers_ap.reset(); 6459 m_abi_sp.reset(); 6460 m_system_runtime_ap.reset(); 6461 m_os_ap.reset(); 6462 m_dyld_ap.reset(); 6463 m_jit_loaders_ap.reset(); 6464 m_image_tokens.clear(); 6465 m_allocated_memory_cache.Clear(); 6466 m_language_runtimes.clear(); 6467 m_instrumentation_runtimes.clear(); 6468 m_thread_list.DiscardThreadPlans(); 6469 m_memory_cache.Clear(true); 6470 m_stop_info_override_callback = NULL; 6471 DoDidExec(); 6472 CompleteAttach (); 6473 // Flush the process (threads and all stack frames) after running CompleteAttach() 6474 // in case the dynamic loader loaded things in new locations. 6475 Flush(); 6476 6477 // After we figure out what was loaded/unloaded in CompleteAttach, 6478 // we need to let the target know so it can do any cleanup it needs to. 6479 target.DidExec(); 6480 } 6481 6482 addr_t 6483 Process::ResolveIndirectFunction(const Address *address, Error &error) 6484 { 6485 if (address == nullptr) 6486 { 6487 error.SetErrorString("Invalid address argument"); 6488 return LLDB_INVALID_ADDRESS; 6489 } 6490 6491 addr_t function_addr = LLDB_INVALID_ADDRESS; 6492 6493 addr_t addr = address->GetLoadAddress(&GetTarget()); 6494 std::map<addr_t,addr_t>::const_iterator iter = m_resolved_indirect_addresses.find(addr); 6495 if (iter != m_resolved_indirect_addresses.end()) 6496 { 6497 function_addr = (*iter).second; 6498 } 6499 else 6500 { 6501 if (!InferiorCall(this, address, function_addr)) 6502 { 6503 Symbol *symbol = address->CalculateSymbolContextSymbol(); 6504 error.SetErrorStringWithFormat ("Unable to call resolver for indirect function %s", 6505 symbol ? symbol->GetName().AsCString() : "<UNKNOWN>"); 6506 function_addr = LLDB_INVALID_ADDRESS; 6507 } 6508 else 6509 { 6510 m_resolved_indirect_addresses.insert(std::pair<addr_t, addr_t>(addr, function_addr)); 6511 } 6512 } 6513 return function_addr; 6514 } 6515 6516 void 6517 Process::ModulesDidLoad (ModuleList &module_list) 6518 { 6519 SystemRuntime *sys_runtime = GetSystemRuntime(); 6520 if (sys_runtime) 6521 { 6522 sys_runtime->ModulesDidLoad (module_list); 6523 } 6524 6525 GetJITLoaders().ModulesDidLoad (module_list); 6526 6527 // Give runtimes a chance to be created. 6528 InstrumentationRuntime::ModulesDidLoad(module_list, this, m_instrumentation_runtimes); 6529 6530 // Tell runtimes about new modules. 6531 for (auto pos = m_instrumentation_runtimes.begin(); pos != m_instrumentation_runtimes.end(); ++pos) 6532 { 6533 InstrumentationRuntimeSP runtime = pos->second; 6534 runtime->ModulesDidLoad(module_list); 6535 } 6536 6537 // Let any language runtimes we have already created know 6538 // about the modules that loaded. 6539 6540 // Iterate over a copy of this language runtime list in case 6541 // the language runtime ModulesDidLoad somehow causes the language 6542 // riuntime to be unloaded. 6543 LanguageRuntimeCollection language_runtimes(m_language_runtimes); 6544 for (const auto &pair: language_runtimes) 6545 { 6546 // We must check language_runtime_sp to make sure it is not 6547 // NULL as we might cache the fact that we didn't have a 6548 // language runtime for a language. 6549 LanguageRuntimeSP language_runtime_sp = pair.second; 6550 if (language_runtime_sp) 6551 language_runtime_sp->ModulesDidLoad(module_list); 6552 } 6553 } 6554 6555 void 6556 Process::PrintWarning (uint64_t warning_type, void *repeat_key, const char *fmt, ...) 6557 { 6558 bool print_warning = true; 6559 6560 StreamSP stream_sp = GetTarget().GetDebugger().GetAsyncOutputStream(); 6561 if (stream_sp.get() == nullptr) 6562 return; 6563 if (warning_type == eWarningsOptimization 6564 && GetWarningsOptimization() == false) 6565 { 6566 return; 6567 } 6568 6569 if (repeat_key != nullptr) 6570 { 6571 WarningsCollection::iterator it = m_warnings_issued.find (warning_type); 6572 if (it == m_warnings_issued.end()) 6573 { 6574 m_warnings_issued[warning_type] = WarningsPointerSet(); 6575 m_warnings_issued[warning_type].insert (repeat_key); 6576 } 6577 else 6578 { 6579 if (it->second.find (repeat_key) != it->second.end()) 6580 { 6581 print_warning = false; 6582 } 6583 else 6584 { 6585 it->second.insert (repeat_key); 6586 } 6587 } 6588 } 6589 6590 if (print_warning) 6591 { 6592 va_list args; 6593 va_start (args, fmt); 6594 stream_sp->PrintfVarArg (fmt, args); 6595 va_end (args); 6596 } 6597 } 6598 6599 void 6600 Process::PrintWarningOptimization (const SymbolContext &sc) 6601 { 6602 if (GetWarningsOptimization() == true 6603 && sc.module_sp.get() 6604 && sc.module_sp->GetFileSpec().GetFilename().IsEmpty() == false 6605 && sc.function 6606 && sc.function->GetIsOptimized() == true) 6607 { 6608 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()); 6609 } 6610 } 6611 6612 ThreadCollectionSP 6613 Process::GetHistoryThreads(lldb::addr_t addr) 6614 { 6615 ThreadCollectionSP threads; 6616 6617 const MemoryHistorySP &memory_history = MemoryHistory::FindPlugin(shared_from_this()); 6618 6619 if (! memory_history.get()) { 6620 return threads; 6621 } 6622 6623 threads.reset(new ThreadCollection(memory_history->GetHistoryThreads(addr))); 6624 6625 return threads; 6626 } 6627 6628 InstrumentationRuntimeSP 6629 Process::GetInstrumentationRuntime(lldb::InstrumentationRuntimeType type) 6630 { 6631 InstrumentationRuntimeCollection::iterator pos; 6632 pos = m_instrumentation_runtimes.find (type); 6633 if (pos == m_instrumentation_runtimes.end()) 6634 { 6635 return InstrumentationRuntimeSP(); 6636 } 6637 else 6638 return (*pos).second; 6639 } 6640 6641 bool 6642 Process::GetModuleSpec(const FileSpec& module_file_spec, 6643 const ArchSpec& arch, 6644 ModuleSpec& module_spec) 6645 { 6646 module_spec.Clear(); 6647 return false; 6648 } 6649