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 // C Includes 11 // C++ Includes 12 // Other libraries and framework includes 13 // Project includes 14 #include "lldb/Target/Process.h" 15 #include "lldb/Breakpoint/StoppointCallbackContext.h" 16 #include "lldb/Breakpoint/BreakpointLocation.h" 17 #include "lldb/Core/Event.h" 18 #include "lldb/Core/Debugger.h" 19 #include "lldb/Core/Log.h" 20 #include "lldb/Core/Module.h" 21 #include "lldb/Core/ModuleSpec.h" 22 #include "lldb/Core/PluginManager.h" 23 #include "lldb/Core/State.h" 24 #include "lldb/Core/StreamFile.h" 25 #include "lldb/Expression/UserExpression.h" 26 #include "lldb/Expression/IRDynamicChecks.h" 27 #include "lldb/Host/ConnectionFileDescriptor.h" 28 #include "lldb/Host/FileSystem.h" 29 #include "lldb/Host/Host.h" 30 #include "lldb/Host/HostInfo.h" 31 #include "lldb/Host/Pipe.h" 32 #include "lldb/Host/Terminal.h" 33 #include "lldb/Host/ThreadLauncher.h" 34 #include "lldb/Interpreter/CommandInterpreter.h" 35 #include "lldb/Interpreter/OptionValueProperties.h" 36 #include "lldb/Symbol/Function.h" 37 #include "lldb/Symbol/Symbol.h" 38 #include "lldb/Target/ABI.h" 39 #include "lldb/Target/DynamicLoader.h" 40 #include "lldb/Target/InstrumentationRuntime.h" 41 #include "lldb/Target/JITLoader.h" 42 #include "lldb/Target/JITLoaderList.h" 43 #include "lldb/Target/MemoryHistory.h" 44 #include "lldb/Target/MemoryRegionInfo.h" 45 #include "lldb/Target/OperatingSystem.h" 46 #include "lldb/Target/LanguageRuntime.h" 47 #include "lldb/Target/CPPLanguageRuntime.h" 48 #include "lldb/Target/ObjCLanguageRuntime.h" 49 #include "lldb/Target/Platform.h" 50 #include "lldb/Target/RegisterContext.h" 51 #include "lldb/Target/StopInfo.h" 52 #include "lldb/Target/SystemRuntime.h" 53 #include "lldb/Target/Target.h" 54 #include "lldb/Target/TargetList.h" 55 #include "lldb/Target/Thread.h" 56 #include "lldb/Target/ThreadPlan.h" 57 #include "lldb/Target/ThreadPlanBase.h" 58 #include "lldb/Target/UnixSignals.h" 59 #include "lldb/Utility/NameMatches.h" 60 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 61 62 using namespace lldb; 63 using namespace lldb_private; 64 65 // Comment out line below to disable memory caching, overriding the process setting 66 // target.process.disable-memory-cache 67 #define ENABLE_MEMORY_CACHING 68 69 #ifdef ENABLE_MEMORY_CACHING 70 #define DISABLE_MEM_CACHE_DEFAULT false 71 #else 72 #define DISABLE_MEM_CACHE_DEFAULT true 73 #endif 74 75 class ProcessOptionValueProperties : public OptionValueProperties 76 { 77 public: 78 ProcessOptionValueProperties (const ConstString &name) : 79 OptionValueProperties (name) 80 { 81 } 82 83 // This constructor is used when creating ProcessOptionValueProperties when it 84 // is part of a new lldb_private::Process instance. It will copy all current 85 // global property values as needed 86 ProcessOptionValueProperties (ProcessProperties *global_properties) : 87 OptionValueProperties(*global_properties->GetValueProperties()) 88 { 89 } 90 91 const Property * 92 GetPropertyAtIndex(const ExecutionContext *exe_ctx, bool will_modify, uint32_t idx) const override 93 { 94 // When getting the value for a key from the process options, we will always 95 // try and grab the setting from the current process if there is one. Else we just 96 // use the one from this instance. 97 if (exe_ctx) 98 { 99 Process *process = exe_ctx->GetProcessPtr(); 100 if (process) 101 { 102 ProcessOptionValueProperties *instance_properties = static_cast<ProcessOptionValueProperties *>(process->GetValueProperties().get()); 103 if (this != instance_properties) 104 return instance_properties->ProtectedGetPropertyAtIndex (idx); 105 } 106 } 107 return ProtectedGetPropertyAtIndex (idx); 108 } 109 }; 110 111 static PropertyDefinition 112 g_properties[] = 113 { 114 { "disable-memory-cache" , OptionValue::eTypeBoolean, false, DISABLE_MEM_CACHE_DEFAULT, NULL, NULL, "Disable reading and caching of memory in fixed-size units." }, 115 { "extra-startup-command", OptionValue::eTypeArray , false, OptionValue::eTypeString, NULL, NULL, "A list containing extra commands understood by the particular process plugin used. " 116 "For instance, to turn on debugserver logging set this to \"QSetLogging:bitmask=LOG_DEFAULT;\"" }, 117 { "ignore-breakpoints-in-expressions", OptionValue::eTypeBoolean, true, true, NULL, NULL, "If true, breakpoints will be ignored during expression evaluation." }, 118 { "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." }, 119 { "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." }, 120 { "stop-on-sharedlibrary-events" , OptionValue::eTypeBoolean, true, false, NULL, NULL, "If true, stop when a shared library is loaded or unloaded." }, 121 { "detach-keeps-stopped" , OptionValue::eTypeBoolean, true, false, NULL, NULL, "If true, detach will attempt to keep the process stopped." }, 122 { "memory-cache-line-size" , OptionValue::eTypeUInt64, false, 512, NULL, NULL, "The memory cache line size" }, 123 { "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." }, 124 { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } 125 }; 126 127 enum { 128 ePropertyDisableMemCache, 129 ePropertyExtraStartCommand, 130 ePropertyIgnoreBreakpointsInExpressions, 131 ePropertyUnwindOnErrorInExpressions, 132 ePropertyPythonOSPluginPath, 133 ePropertyStopOnSharedLibraryEvents, 134 ePropertyDetachKeepsStopped, 135 ePropertyMemCacheLineSize, 136 ePropertyWarningOptimization 137 }; 138 139 ProcessProperties::ProcessProperties (lldb_private::Process *process) : 140 Properties (), 141 m_process (process) // Can be NULL for global ProcessProperties 142 { 143 if (process == NULL) 144 { 145 // Global process properties, set them up one time 146 m_collection_sp.reset (new ProcessOptionValueProperties(ConstString("process"))); 147 m_collection_sp->Initialize(g_properties); 148 m_collection_sp->AppendProperty(ConstString("thread"), 149 ConstString("Settings specific to threads."), 150 true, 151 Thread::GetGlobalProperties()->GetValueProperties()); 152 } 153 else 154 { 155 m_collection_sp.reset (new ProcessOptionValueProperties(Process::GetGlobalProperties().get())); 156 m_collection_sp->SetValueChangedCallback(ePropertyPythonOSPluginPath, ProcessProperties::OptionValueChangedCallback, this); 157 } 158 } 159 160 ProcessProperties::~ProcessProperties() = default; 161 162 void 163 ProcessProperties::OptionValueChangedCallback (void *baton, OptionValue *option_value) 164 { 165 ProcessProperties *properties = (ProcessProperties *)baton; 166 if (properties->m_process) 167 properties->m_process->LoadOperatingSystemPlugin(true); 168 } 169 170 bool 171 ProcessProperties::GetDisableMemoryCache() const 172 { 173 const uint32_t idx = ePropertyDisableMemCache; 174 return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0); 175 } 176 177 uint64_t 178 ProcessProperties::GetMemoryCacheLineSize() const 179 { 180 const uint32_t idx = ePropertyMemCacheLineSize; 181 return m_collection_sp->GetPropertyAtIndexAsUInt64 (NULL, idx, g_properties[idx].default_uint_value); 182 } 183 184 Args 185 ProcessProperties::GetExtraStartupCommands () const 186 { 187 Args args; 188 const uint32_t idx = ePropertyExtraStartCommand; 189 m_collection_sp->GetPropertyAtIndexAsArgs(NULL, idx, args); 190 return args; 191 } 192 193 void 194 ProcessProperties::SetExtraStartupCommands (const Args &args) 195 { 196 const uint32_t idx = ePropertyExtraStartCommand; 197 m_collection_sp->SetPropertyAtIndexFromArgs(NULL, idx, args); 198 } 199 200 FileSpec 201 ProcessProperties::GetPythonOSPluginPath () const 202 { 203 const uint32_t idx = ePropertyPythonOSPluginPath; 204 return m_collection_sp->GetPropertyAtIndexAsFileSpec(NULL, idx); 205 } 206 207 void 208 ProcessProperties::SetPythonOSPluginPath (const FileSpec &file) 209 { 210 const uint32_t idx = ePropertyPythonOSPluginPath; 211 m_collection_sp->SetPropertyAtIndexAsFileSpec(NULL, idx, file); 212 } 213 214 bool 215 ProcessProperties::GetIgnoreBreakpointsInExpressions () const 216 { 217 const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions; 218 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 219 } 220 221 void 222 ProcessProperties::SetIgnoreBreakpointsInExpressions (bool ignore) 223 { 224 const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions; 225 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, ignore); 226 } 227 228 bool 229 ProcessProperties::GetUnwindOnErrorInExpressions () const 230 { 231 const uint32_t idx = ePropertyUnwindOnErrorInExpressions; 232 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 233 } 234 235 void 236 ProcessProperties::SetUnwindOnErrorInExpressions (bool ignore) 237 { 238 const uint32_t idx = ePropertyUnwindOnErrorInExpressions; 239 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, ignore); 240 } 241 242 bool 243 ProcessProperties::GetStopOnSharedLibraryEvents () const 244 { 245 const uint32_t idx = ePropertyStopOnSharedLibraryEvents; 246 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 247 } 248 249 void 250 ProcessProperties::SetStopOnSharedLibraryEvents (bool stop) 251 { 252 const uint32_t idx = ePropertyStopOnSharedLibraryEvents; 253 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, stop); 254 } 255 256 bool 257 ProcessProperties::GetDetachKeepsStopped () const 258 { 259 const uint32_t idx = ePropertyDetachKeepsStopped; 260 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 261 } 262 263 void 264 ProcessProperties::SetDetachKeepsStopped (bool stop) 265 { 266 const uint32_t idx = ePropertyDetachKeepsStopped; 267 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, stop); 268 } 269 270 bool 271 ProcessProperties::GetWarningsOptimization () const 272 { 273 const uint32_t idx = ePropertyWarningOptimization; 274 return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0); 275 } 276 277 void 278 ProcessInstanceInfo::Dump (Stream &s, Platform *platform) const 279 { 280 const char *cstr; 281 if (m_pid != LLDB_INVALID_PROCESS_ID) 282 s.Printf (" pid = %" PRIu64 "\n", m_pid); 283 284 if (m_parent_pid != LLDB_INVALID_PROCESS_ID) 285 s.Printf (" parent = %" PRIu64 "\n", m_parent_pid); 286 287 if (m_executable) 288 { 289 s.Printf (" name = %s\n", m_executable.GetFilename().GetCString()); 290 s.PutCString (" file = "); 291 m_executable.Dump(&s); 292 s.EOL(); 293 } 294 const uint32_t argc = m_arguments.GetArgumentCount(); 295 if (argc > 0) 296 { 297 for (uint32_t i=0; i<argc; i++) 298 { 299 const char *arg = m_arguments.GetArgumentAtIndex(i); 300 if (i < 10) 301 s.Printf (" arg[%u] = %s\n", i, arg); 302 else 303 s.Printf ("arg[%u] = %s\n", i, arg); 304 } 305 } 306 307 const uint32_t envc = m_environment.GetArgumentCount(); 308 if (envc > 0) 309 { 310 for (uint32_t i=0; i<envc; i++) 311 { 312 const char *env = m_environment.GetArgumentAtIndex(i); 313 if (i < 10) 314 s.Printf (" env[%u] = %s\n", i, env); 315 else 316 s.Printf ("env[%u] = %s\n", i, env); 317 } 318 } 319 320 if (m_arch.IsValid()) 321 { 322 s.Printf (" arch = "); 323 m_arch.DumpTriple(s); 324 s.EOL(); 325 } 326 327 if (m_uid != UINT32_MAX) 328 { 329 cstr = platform->GetUserName (m_uid); 330 s.Printf (" uid = %-5u (%s)\n", m_uid, cstr ? cstr : ""); 331 } 332 if (m_gid != UINT32_MAX) 333 { 334 cstr = platform->GetGroupName (m_gid); 335 s.Printf (" gid = %-5u (%s)\n", m_gid, cstr ? cstr : ""); 336 } 337 if (m_euid != UINT32_MAX) 338 { 339 cstr = platform->GetUserName (m_euid); 340 s.Printf (" euid = %-5u (%s)\n", m_euid, cstr ? cstr : ""); 341 } 342 if (m_egid != UINT32_MAX) 343 { 344 cstr = platform->GetGroupName (m_egid); 345 s.Printf (" egid = %-5u (%s)\n", m_egid, cstr ? cstr : ""); 346 } 347 } 348 349 void 350 ProcessInstanceInfo::DumpTableHeader (Stream &s, Platform *platform, bool show_args, bool verbose) 351 { 352 const char *label; 353 if (show_args || verbose) 354 label = "ARGUMENTS"; 355 else 356 label = "NAME"; 357 358 if (verbose) 359 { 360 s.Printf ("PID PARENT USER GROUP EFF USER EFF GROUP TRIPLE %s\n", label); 361 s.PutCString ("====== ====== ========== ========== ========== ========== ======================== ============================\n"); 362 } 363 else 364 { 365 s.Printf ("PID PARENT USER TRIPLE %s\n", label); 366 s.PutCString ("====== ====== ========== ======================== ============================\n"); 367 } 368 } 369 370 void 371 ProcessInstanceInfo::DumpAsTableRow (Stream &s, Platform *platform, bool show_args, bool verbose) const 372 { 373 if (m_pid != LLDB_INVALID_PROCESS_ID) 374 { 375 const char *cstr; 376 s.Printf ("%-6" PRIu64 " %-6" PRIu64 " ", m_pid, m_parent_pid); 377 378 StreamString arch_strm; 379 if (m_arch.IsValid()) 380 m_arch.DumpTriple(arch_strm); 381 382 if (verbose) 383 { 384 cstr = platform->GetUserName (m_uid); 385 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 386 s.Printf ("%-10s ", cstr); 387 else 388 s.Printf ("%-10u ", m_uid); 389 390 cstr = platform->GetGroupName (m_gid); 391 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 392 s.Printf ("%-10s ", cstr); 393 else 394 s.Printf ("%-10u ", m_gid); 395 396 cstr = platform->GetUserName (m_euid); 397 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 398 s.Printf ("%-10s ", cstr); 399 else 400 s.Printf ("%-10u ", m_euid); 401 402 cstr = platform->GetGroupName (m_egid); 403 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 404 s.Printf ("%-10s ", cstr); 405 else 406 s.Printf ("%-10u ", m_egid); 407 408 s.Printf ("%-24s ", arch_strm.GetString().c_str()); 409 } 410 else 411 { 412 s.Printf ("%-10s %-24s ", 413 platform->GetUserName (m_euid), 414 arch_strm.GetString().c_str()); 415 } 416 417 if (verbose || show_args) 418 { 419 const uint32_t argc = m_arguments.GetArgumentCount(); 420 if (argc > 0) 421 { 422 for (uint32_t i=0; i<argc; i++) 423 { 424 if (i > 0) 425 s.PutChar (' '); 426 s.PutCString (m_arguments.GetArgumentAtIndex(i)); 427 } 428 } 429 } 430 else 431 { 432 s.PutCString (GetName()); 433 } 434 435 s.EOL(); 436 } 437 } 438 439 Error 440 ProcessLaunchCommandOptions::SetOptionValue (uint32_t option_idx, const char *option_arg) 441 { 442 Error error; 443 const int short_option = m_getopt_table[option_idx].val; 444 445 switch (short_option) 446 { 447 case 's': // Stop at program entry point 448 launch_info.GetFlags().Set (eLaunchFlagStopAtEntry); 449 break; 450 451 case 'i': // STDIN for read only 452 { 453 FileAction action; 454 if (action.Open(STDIN_FILENO, FileSpec{option_arg, false}, true, false)) 455 launch_info.AppendFileAction (action); 456 break; 457 } 458 459 case 'o': // Open STDOUT for write only 460 { 461 FileAction action; 462 if (action.Open(STDOUT_FILENO, FileSpec{option_arg, false}, false, true)) 463 launch_info.AppendFileAction (action); 464 break; 465 } 466 467 case 'e': // STDERR for write only 468 { 469 FileAction action; 470 if (action.Open(STDERR_FILENO, FileSpec{option_arg, false}, false, true)) 471 launch_info.AppendFileAction (action); 472 break; 473 } 474 475 case 'p': // Process plug-in name 476 launch_info.SetProcessPluginName (option_arg); 477 break; 478 479 case 'n': // Disable STDIO 480 { 481 FileAction action; 482 const FileSpec dev_null{FileSystem::DEV_NULL, false}; 483 if (action.Open(STDIN_FILENO, dev_null, true, false)) 484 launch_info.AppendFileAction (action); 485 if (action.Open(STDOUT_FILENO, dev_null, false, true)) 486 launch_info.AppendFileAction (action); 487 if (action.Open(STDERR_FILENO, dev_null, false, true)) 488 launch_info.AppendFileAction (action); 489 break; 490 } 491 492 case 'w': 493 launch_info.SetWorkingDirectory(FileSpec{option_arg, false}); 494 break; 495 496 case 't': // Open process in new terminal window 497 launch_info.GetFlags().Set (eLaunchFlagLaunchInTTY); 498 break; 499 500 case 'a': 501 if (!launch_info.GetArchitecture().SetTriple (option_arg, m_interpreter.GetPlatform(true).get())) 502 launch_info.GetArchitecture().SetTriple (option_arg); 503 break; 504 505 case 'A': // Disable ASLR. 506 { 507 bool success; 508 const bool disable_aslr_arg = Args::StringToBoolean (option_arg, true, &success); 509 if (success) 510 disable_aslr = disable_aslr_arg ? eLazyBoolYes : eLazyBoolNo; 511 else 512 error.SetErrorStringWithFormat ("Invalid boolean value for disable-aslr option: '%s'", option_arg ? option_arg : "<null>"); 513 break; 514 } 515 516 case 'X': // shell expand args. 517 { 518 bool success; 519 const bool expand_args = Args::StringToBoolean (option_arg, true, &success); 520 if (success) 521 launch_info.SetShellExpandArguments(expand_args); 522 else 523 error.SetErrorStringWithFormat ("Invalid boolean value for shell-expand-args option: '%s'", option_arg ? option_arg : "<null>"); 524 break; 525 } 526 527 case 'c': 528 if (option_arg && option_arg[0]) 529 launch_info.SetShell (FileSpec(option_arg, false)); 530 else 531 launch_info.SetShell (HostInfo::GetDefaultShell()); 532 break; 533 534 case 'v': 535 launch_info.GetEnvironmentEntries().AppendArgument(option_arg); 536 break; 537 538 default: 539 error.SetErrorStringWithFormat("unrecognized short option character '%c'", short_option); 540 break; 541 } 542 return error; 543 } 544 545 OptionDefinition 546 ProcessLaunchCommandOptions::g_option_table[] = 547 { 548 { 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."}, 549 { 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."}, 550 { LLDB_OPT_SET_ALL, false, "plugin", 'p', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypePlugin, "Name of the process plugin you want to use."}, 551 { 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."}, 552 { LLDB_OPT_SET_ALL, false, "arch", 'a', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeArchitecture, "Set the architecture for the process to launch when ambiguous."}, 553 { 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."}, 554 { 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)."}, 555 556 { LLDB_OPT_SET_1 , false, "stdin", 'i', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeFilename, "Redirect stdin for the process to <filename>."}, 557 { LLDB_OPT_SET_1 , false, "stdout", 'o', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeFilename, "Redirect stdout for the process to <filename>."}, 558 { LLDB_OPT_SET_1 , false, "stderr", 'e', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeFilename, "Redirect stderr for the process to <filename>."}, 559 560 { LLDB_OPT_SET_2 , false, "tty", 't', OptionParser::eNoArgument, NULL, NULL, 0, eArgTypeNone, "Start the process in a terminal (not supported on all platforms)."}, 561 562 { 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."}, 563 { 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."}, 564 { 0 , false, NULL, 0, 0, NULL, NULL, 0, eArgTypeNone, NULL } 565 }; 566 567 bool 568 ProcessInstanceInfoMatch::NameMatches (const char *process_name) const 569 { 570 if (m_name_match_type == eNameMatchIgnore || process_name == NULL) 571 return true; 572 const char *match_name = m_match_info.GetName(); 573 if (!match_name) 574 return true; 575 576 return lldb_private::NameMatches (process_name, m_name_match_type, match_name); 577 } 578 579 bool 580 ProcessInstanceInfoMatch::Matches (const ProcessInstanceInfo &proc_info) const 581 { 582 if (!NameMatches (proc_info.GetName())) 583 return false; 584 585 if (m_match_info.ProcessIDIsValid() && 586 m_match_info.GetProcessID() != proc_info.GetProcessID()) 587 return false; 588 589 if (m_match_info.ParentProcessIDIsValid() && 590 m_match_info.GetParentProcessID() != proc_info.GetParentProcessID()) 591 return false; 592 593 if (m_match_info.UserIDIsValid () && 594 m_match_info.GetUserID() != proc_info.GetUserID()) 595 return false; 596 597 if (m_match_info.GroupIDIsValid () && 598 m_match_info.GetGroupID() != proc_info.GetGroupID()) 599 return false; 600 601 if (m_match_info.EffectiveUserIDIsValid () && 602 m_match_info.GetEffectiveUserID() != proc_info.GetEffectiveUserID()) 603 return false; 604 605 if (m_match_info.EffectiveGroupIDIsValid () && 606 m_match_info.GetEffectiveGroupID() != proc_info.GetEffectiveGroupID()) 607 return false; 608 609 if (m_match_info.GetArchitecture().IsValid() && 610 !m_match_info.GetArchitecture().IsCompatibleMatch(proc_info.GetArchitecture())) 611 return false; 612 return true; 613 } 614 615 bool 616 ProcessInstanceInfoMatch::MatchAllProcesses () const 617 { 618 if (m_name_match_type != eNameMatchIgnore) 619 return false; 620 621 if (m_match_info.ProcessIDIsValid()) 622 return false; 623 624 if (m_match_info.ParentProcessIDIsValid()) 625 return false; 626 627 if (m_match_info.UserIDIsValid ()) 628 return false; 629 630 if (m_match_info.GroupIDIsValid ()) 631 return false; 632 633 if (m_match_info.EffectiveUserIDIsValid ()) 634 return false; 635 636 if (m_match_info.EffectiveGroupIDIsValid ()) 637 return false; 638 639 if (m_match_info.GetArchitecture().IsValid()) 640 return false; 641 642 if (m_match_all_users) 643 return false; 644 645 return true; 646 } 647 648 void 649 ProcessInstanceInfoMatch::Clear() 650 { 651 m_match_info.Clear(); 652 m_name_match_type = eNameMatchIgnore; 653 m_match_all_users = false; 654 } 655 656 ProcessSP 657 Process::FindPlugin (lldb::TargetSP target_sp, const char *plugin_name, Listener &listener, const FileSpec *crash_file_path) 658 { 659 static uint32_t g_process_unique_id = 0; 660 661 ProcessSP process_sp; 662 ProcessCreateInstance create_callback = NULL; 663 if (plugin_name) 664 { 665 ConstString const_plugin_name(plugin_name); 666 create_callback = PluginManager::GetProcessCreateCallbackForPluginName (const_plugin_name); 667 if (create_callback) 668 { 669 process_sp = create_callback(target_sp, listener, crash_file_path); 670 if (process_sp) 671 { 672 if (process_sp->CanDebug(target_sp, true)) 673 { 674 process_sp->m_process_unique_id = ++g_process_unique_id; 675 } 676 else 677 process_sp.reset(); 678 } 679 } 680 } 681 else 682 { 683 for (uint32_t idx = 0; (create_callback = PluginManager::GetProcessCreateCallbackAtIndex(idx)) != NULL; ++idx) 684 { 685 process_sp = create_callback(target_sp, listener, crash_file_path); 686 if (process_sp) 687 { 688 if (process_sp->CanDebug(target_sp, false)) 689 { 690 process_sp->m_process_unique_id = ++g_process_unique_id; 691 break; 692 } 693 else 694 process_sp.reset(); 695 } 696 } 697 } 698 return process_sp; 699 } 700 701 ConstString & 702 Process::GetStaticBroadcasterClass () 703 { 704 static ConstString class_name ("lldb.process"); 705 return class_name; 706 } 707 708 Process::Process(lldb::TargetSP target_sp, Listener &listener) : 709 Process(target_sp, listener, UnixSignals::Create(HostInfo::GetArchitecture())) 710 { 711 // This constructor just delegates to the full Process constructor, 712 // defaulting to using the Host's UnixSignals. 713 } 714 715 Process::Process(lldb::TargetSP target_sp, Listener &listener, const UnixSignalsSP &unix_signals_sp) : 716 ProcessProperties (this), 717 UserID (LLDB_INVALID_PROCESS_ID), 718 Broadcaster (&(target_sp->GetDebugger()), Process::GetStaticBroadcasterClass().AsCString()), 719 m_target_sp (target_sp), 720 m_public_state (eStateUnloaded), 721 m_private_state (eStateUnloaded), 722 m_private_state_broadcaster (NULL, "lldb.process.internal_state_broadcaster"), 723 m_private_state_control_broadcaster (NULL, "lldb.process.internal_state_control_broadcaster"), 724 m_private_state_listener ("lldb.process.internal_state_listener"), 725 m_private_state_control_wait(), 726 m_mod_id (), 727 m_process_unique_id(0), 728 m_thread_index_id (0), 729 m_thread_id_to_index_id_map (), 730 m_exit_status (-1), 731 m_exit_string (), 732 m_exit_status_mutex(), 733 m_thread_mutex (Mutex::eMutexTypeRecursive), 734 m_thread_list_real (this), 735 m_thread_list (this), 736 m_extended_thread_list (this), 737 m_extended_thread_stop_id (0), 738 m_queue_list (this), 739 m_queue_list_stop_id (0), 740 m_notifications (), 741 m_image_tokens (), 742 m_listener (listener), 743 m_breakpoint_site_list (), 744 m_dynamic_checkers_ap (), 745 m_unix_signals_sp (unix_signals_sp), 746 m_abi_sp (), 747 m_process_input_reader (), 748 m_stdio_communication ("process.stdio"), 749 m_stdio_communication_mutex (Mutex::eMutexTypeRecursive), 750 m_stdin_forward (false), 751 m_stdout_data (), 752 m_stderr_data (), 753 m_profile_data_comm_mutex (Mutex::eMutexTypeRecursive), 754 m_profile_data (), 755 m_iohandler_sync (0), 756 m_memory_cache (*this), 757 m_allocated_memory_cache (*this), 758 m_should_detach (false), 759 m_next_event_action_ap(), 760 m_public_run_lock (), 761 m_private_run_lock (), 762 m_currently_handling_event(false), 763 m_stop_info_override_callback (NULL), 764 m_finalizing (false), 765 m_finalize_called (false), 766 m_clear_thread_plans_on_stop (false), 767 m_force_next_event_delivery (false), 768 m_last_broadcast_state (eStateInvalid), 769 m_destroy_in_process (false), 770 m_can_interpret_function_calls(false), 771 m_warnings_issued (), 772 m_can_jit(eCanJITDontKnow) 773 { 774 CheckInWithManager (); 775 776 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 777 if (log) 778 log->Printf ("%p Process::Process()", static_cast<void*>(this)); 779 780 if (!m_unix_signals_sp) 781 m_unix_signals_sp = std::make_shared<UnixSignals>(); 782 783 SetEventName (eBroadcastBitStateChanged, "state-changed"); 784 SetEventName (eBroadcastBitInterrupt, "interrupt"); 785 SetEventName (eBroadcastBitSTDOUT, "stdout-available"); 786 SetEventName (eBroadcastBitSTDERR, "stderr-available"); 787 SetEventName (eBroadcastBitProfileData, "profile-data-available"); 788 789 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlStop , "control-stop" ); 790 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlPause , "control-pause" ); 791 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlResume, "control-resume"); 792 793 listener.StartListeningForEvents (this, 794 eBroadcastBitStateChanged | 795 eBroadcastBitInterrupt | 796 eBroadcastBitSTDOUT | 797 eBroadcastBitSTDERR | 798 eBroadcastBitProfileData); 799 800 m_private_state_listener.StartListeningForEvents(&m_private_state_broadcaster, 801 eBroadcastBitStateChanged | 802 eBroadcastBitInterrupt); 803 804 m_private_state_listener.StartListeningForEvents(&m_private_state_control_broadcaster, 805 eBroadcastInternalStateControlStop | 806 eBroadcastInternalStateControlPause | 807 eBroadcastInternalStateControlResume); 808 // We need something valid here, even if just the default UnixSignalsSP. 809 assert (m_unix_signals_sp && "null m_unix_signals_sp after initialization"); 810 811 // Allow the platform to override the default cache line size 812 OptionValueSP value_sp = 813 m_collection_sp->GetPropertyAtIndex(nullptr, true, ePropertyMemCacheLineSize)->GetValue(); 814 uint32_t platform_cache_line_size = target_sp->GetPlatform()->GetDefaultMemoryCacheLineSize(); 815 if (! value_sp->OptionWasSet() && platform_cache_line_size != 0) 816 value_sp->SetUInt64Value(platform_cache_line_size); 817 } 818 819 Process::~Process() 820 { 821 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 822 if (log) 823 log->Printf ("%p Process::~Process()", static_cast<void*>(this)); 824 StopPrivateStateThread(); 825 826 // ThreadList::Clear() will try to acquire this process's mutex, so 827 // explicitly clear the thread list here to ensure that the mutex 828 // is not destroyed before the thread list. 829 m_thread_list.Clear(); 830 } 831 832 const ProcessPropertiesSP & 833 Process::GetGlobalProperties() 834 { 835 static ProcessPropertiesSP g_settings_sp; 836 if (!g_settings_sp) 837 g_settings_sp.reset (new ProcessProperties (NULL)); 838 return g_settings_sp; 839 } 840 841 void 842 Process::Finalize() 843 { 844 m_finalizing = true; 845 846 // Destroy this process if needed 847 switch (GetPrivateState()) 848 { 849 case eStateConnected: 850 case eStateAttaching: 851 case eStateLaunching: 852 case eStateStopped: 853 case eStateRunning: 854 case eStateStepping: 855 case eStateCrashed: 856 case eStateSuspended: 857 Destroy(false); 858 break; 859 860 case eStateInvalid: 861 case eStateUnloaded: 862 case eStateDetached: 863 case eStateExited: 864 break; 865 } 866 867 // Clear our broadcaster before we proceed with destroying 868 Broadcaster::Clear(); 869 870 // Do any cleanup needed prior to being destructed... Subclasses 871 // that override this method should call this superclass method as well. 872 873 // We need to destroy the loader before the derived Process class gets destroyed 874 // since it is very likely that undoing the loader will require access to the real process. 875 m_dynamic_checkers_ap.reset(); 876 m_abi_sp.reset(); 877 m_os_ap.reset(); 878 m_system_runtime_ap.reset(); 879 m_dyld_ap.reset(); 880 m_jit_loaders_ap.reset(); 881 m_thread_list_real.Destroy(); 882 m_thread_list.Destroy(); 883 m_extended_thread_list.Destroy(); 884 m_queue_list.Clear(); 885 m_queue_list_stop_id = 0; 886 std::vector<Notifications> empty_notifications; 887 m_notifications.swap(empty_notifications); 888 m_image_tokens.clear(); 889 m_memory_cache.Clear(); 890 m_allocated_memory_cache.Clear(); 891 m_language_runtimes.clear(); 892 m_instrumentation_runtimes.clear(); 893 m_next_event_action_ap.reset(); 894 m_stop_info_override_callback = NULL; 895 // Clear the last natural stop ID since it has a strong 896 // reference to this process 897 m_mod_id.SetStopEventForLastNaturalStopID(EventSP()); 898 //#ifdef LLDB_CONFIGURATION_DEBUG 899 // StreamFile s(stdout, false); 900 // EventSP event_sp; 901 // while (m_private_state_listener.GetNextEvent(event_sp)) 902 // { 903 // event_sp->Dump (&s); 904 // s.EOL(); 905 // } 906 //#endif 907 // We have to be very careful here as the m_private_state_listener might 908 // contain events that have ProcessSP values in them which can keep this 909 // process around forever. These events need to be cleared out. 910 m_private_state_listener.Clear(); 911 m_public_run_lock.TrySetRunning(); // This will do nothing if already locked 912 m_public_run_lock.SetStopped(); 913 m_private_run_lock.TrySetRunning(); // This will do nothing if already locked 914 m_private_run_lock.SetStopped(); 915 m_finalize_called = true; 916 } 917 918 void 919 Process::RegisterNotificationCallbacks (const Notifications& callbacks) 920 { 921 m_notifications.push_back(callbacks); 922 if (callbacks.initialize != NULL) 923 callbacks.initialize (callbacks.baton, this); 924 } 925 926 bool 927 Process::UnregisterNotificationCallbacks(const Notifications& callbacks) 928 { 929 std::vector<Notifications>::iterator pos, end = m_notifications.end(); 930 for (pos = m_notifications.begin(); pos != end; ++pos) 931 { 932 if (pos->baton == callbacks.baton && 933 pos->initialize == callbacks.initialize && 934 pos->process_state_changed == callbacks.process_state_changed) 935 { 936 m_notifications.erase(pos); 937 return true; 938 } 939 } 940 return false; 941 } 942 943 void 944 Process::SynchronouslyNotifyStateChanged (StateType state) 945 { 946 std::vector<Notifications>::iterator notification_pos, notification_end = m_notifications.end(); 947 for (notification_pos = m_notifications.begin(); notification_pos != notification_end; ++notification_pos) 948 { 949 if (notification_pos->process_state_changed) 950 notification_pos->process_state_changed (notification_pos->baton, this, state); 951 } 952 } 953 954 // FIXME: We need to do some work on events before the general Listener sees them. 955 // For instance if we are continuing from a breakpoint, we need to ensure that we do 956 // the little "insert real insn, step & stop" trick. But we can't do that when the 957 // event is delivered by the broadcaster - since that is done on the thread that is 958 // waiting for new events, so if we needed more than one event for our handling, we would 959 // stall. So instead we do it when we fetch the event off of the queue. 960 // 961 962 StateType 963 Process::GetNextEvent (EventSP &event_sp) 964 { 965 StateType state = eStateInvalid; 966 967 if (m_listener.GetNextEventForBroadcaster (this, event_sp) && event_sp) 968 state = Process::ProcessEventData::GetStateFromEvent (event_sp.get()); 969 970 return state; 971 } 972 973 void 974 Process::SyncIOHandler (uint32_t iohandler_id, uint64_t timeout_msec) 975 { 976 // don't sync (potentially context switch) in case where there is no process IO 977 if (! m_process_input_reader) 978 return; 979 980 TimeValue timeout = TimeValue::Now(); 981 timeout.OffsetWithMicroSeconds(timeout_msec*1000); 982 uint32_t new_iohandler_id = 0; 983 m_iohandler_sync.WaitForValueNotEqualTo(iohandler_id, new_iohandler_id, &timeout); 984 985 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 986 if (log) 987 log->Printf("Process::%s waited for m_iohandler_sync to change from %u, new value is %u", __FUNCTION__, iohandler_id, new_iohandler_id); 988 } 989 990 StateType 991 Process::WaitForProcessToStop (const TimeValue *timeout, 992 EventSP *event_sp_ptr, 993 bool wait_always, 994 Listener *hijack_listener, 995 Stream *stream) 996 { 997 // We can't just wait for a "stopped" event, because the stopped event may have restarted the target. 998 // We have to actually check each event, and in the case of a stopped event check the restarted flag 999 // on the event. 1000 if (event_sp_ptr) 1001 event_sp_ptr->reset(); 1002 StateType state = GetState(); 1003 // If we are exited or detached, we won't ever get back to any 1004 // other valid state... 1005 if (state == eStateDetached || state == eStateExited) 1006 return state; 1007 1008 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1009 if (log) 1010 log->Printf ("Process::%s (timeout = %p)", __FUNCTION__, 1011 static_cast<const void*>(timeout)); 1012 1013 if (!wait_always && 1014 StateIsStoppedState(state, true) && 1015 StateIsStoppedState(GetPrivateState(), true)) 1016 { 1017 if (log) 1018 log->Printf("Process::%s returning without waiting for events; process private and public states are already 'stopped'.", 1019 __FUNCTION__); 1020 // We need to toggle the run lock as this won't get done in 1021 // SetPublicState() if the process is hijacked. 1022 if (hijack_listener) 1023 m_public_run_lock.SetStopped(); 1024 return state; 1025 } 1026 1027 while (state != eStateInvalid) 1028 { 1029 EventSP event_sp; 1030 state = WaitForStateChangedEvents (timeout, event_sp, hijack_listener); 1031 if (event_sp_ptr && event_sp) 1032 *event_sp_ptr = event_sp; 1033 1034 bool pop_process_io_handler = hijack_listener != NULL; 1035 Process::HandleProcessStateChangedEvent (event_sp, stream, pop_process_io_handler); 1036 1037 switch (state) 1038 { 1039 case eStateCrashed: 1040 case eStateDetached: 1041 case eStateExited: 1042 case eStateUnloaded: 1043 // We need to toggle the run lock as this won't get done in 1044 // SetPublicState() if the process is hijacked. 1045 if (hijack_listener) 1046 m_public_run_lock.SetStopped(); 1047 return state; 1048 case eStateStopped: 1049 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 1050 continue; 1051 else 1052 { 1053 // We need to toggle the run lock as this won't get done in 1054 // SetPublicState() if the process is hijacked. 1055 if (hijack_listener) 1056 m_public_run_lock.SetStopped(); 1057 return state; 1058 } 1059 default: 1060 continue; 1061 } 1062 } 1063 return state; 1064 } 1065 1066 bool 1067 Process::HandleProcessStateChangedEvent (const EventSP &event_sp, 1068 Stream *stream, 1069 bool &pop_process_io_handler) 1070 { 1071 const bool handle_pop = pop_process_io_handler == true; 1072 1073 pop_process_io_handler = false; 1074 ProcessSP process_sp = Process::ProcessEventData::GetProcessFromEvent(event_sp.get()); 1075 1076 if (!process_sp) 1077 return false; 1078 1079 StateType event_state = Process::ProcessEventData::GetStateFromEvent (event_sp.get()); 1080 if (event_state == eStateInvalid) 1081 return false; 1082 1083 switch (event_state) 1084 { 1085 case eStateInvalid: 1086 case eStateUnloaded: 1087 case eStateAttaching: 1088 case eStateLaunching: 1089 case eStateStepping: 1090 case eStateDetached: 1091 { 1092 if (stream) 1093 stream->Printf ("Process %" PRIu64 " %s\n", 1094 process_sp->GetID(), 1095 StateAsCString (event_state)); 1096 1097 if (event_state == eStateDetached) 1098 pop_process_io_handler = true; 1099 } 1100 break; 1101 1102 case eStateConnected: 1103 case eStateRunning: 1104 // Don't be chatty when we run... 1105 break; 1106 1107 case eStateExited: 1108 if (stream) 1109 process_sp->GetStatus(*stream); 1110 pop_process_io_handler = true; 1111 break; 1112 1113 case eStateStopped: 1114 case eStateCrashed: 1115 case eStateSuspended: 1116 // Make sure the program hasn't been auto-restarted: 1117 if (Process::ProcessEventData::GetRestartedFromEvent (event_sp.get())) 1118 { 1119 if (stream) 1120 { 1121 size_t num_reasons = Process::ProcessEventData::GetNumRestartedReasons(event_sp.get()); 1122 if (num_reasons > 0) 1123 { 1124 // FIXME: Do we want to report this, or would that just be annoyingly chatty? 1125 if (num_reasons == 1) 1126 { 1127 const char *reason = Process::ProcessEventData::GetRestartedReasonAtIndex (event_sp.get(), 0); 1128 stream->Printf ("Process %" PRIu64 " stopped and restarted: %s\n", 1129 process_sp->GetID(), 1130 reason ? reason : "<UNKNOWN REASON>"); 1131 } 1132 else 1133 { 1134 stream->Printf ("Process %" PRIu64 " stopped and restarted, reasons:\n", 1135 process_sp->GetID()); 1136 1137 1138 for (size_t i = 0; i < num_reasons; i++) 1139 { 1140 const char *reason = Process::ProcessEventData::GetRestartedReasonAtIndex (event_sp.get(), i); 1141 stream->Printf("\t%s\n", reason ? reason : "<UNKNOWN REASON>"); 1142 } 1143 } 1144 } 1145 } 1146 } 1147 else 1148 { 1149 // Lock the thread list so it doesn't change on us, this is the scope for the locker: 1150 { 1151 ThreadList &thread_list = process_sp->GetThreadList(); 1152 Mutex::Locker locker (thread_list.GetMutex()); 1153 1154 ThreadSP curr_thread (thread_list.GetSelectedThread()); 1155 ThreadSP thread; 1156 StopReason curr_thread_stop_reason = eStopReasonInvalid; 1157 if (curr_thread) 1158 curr_thread_stop_reason = curr_thread->GetStopReason(); 1159 if (!curr_thread || 1160 !curr_thread->IsValid() || 1161 curr_thread_stop_reason == eStopReasonInvalid || 1162 curr_thread_stop_reason == eStopReasonNone) 1163 { 1164 // Prefer a thread that has just completed its plan over another thread as current thread. 1165 ThreadSP plan_thread; 1166 ThreadSP other_thread; 1167 1168 const size_t num_threads = thread_list.GetSize(); 1169 size_t i; 1170 for (i = 0; i < num_threads; ++i) 1171 { 1172 thread = thread_list.GetThreadAtIndex(i); 1173 StopReason thread_stop_reason = thread->GetStopReason(); 1174 switch (thread_stop_reason) 1175 { 1176 case eStopReasonInvalid: 1177 case eStopReasonNone: 1178 break; 1179 1180 case eStopReasonSignal: 1181 { 1182 // Don't select a signal thread if we weren't going to stop at that 1183 // signal. We have to have had another reason for stopping here, and 1184 // the user doesn't want to see this thread. 1185 uint64_t signo = thread->GetStopInfo()->GetValue(); 1186 if (process_sp->GetUnixSignals()->GetShouldStop(signo)) 1187 { 1188 if (!other_thread) 1189 other_thread = thread; 1190 } 1191 break; 1192 } 1193 case eStopReasonTrace: 1194 case eStopReasonBreakpoint: 1195 case eStopReasonWatchpoint: 1196 case eStopReasonException: 1197 case eStopReasonExec: 1198 case eStopReasonThreadExiting: 1199 case eStopReasonInstrumentation: 1200 if (!other_thread) 1201 other_thread = thread; 1202 break; 1203 case eStopReasonPlanComplete: 1204 if (!plan_thread) 1205 plan_thread = thread; 1206 break; 1207 } 1208 } 1209 if (plan_thread) 1210 thread_list.SetSelectedThreadByID (plan_thread->GetID()); 1211 else if (other_thread) 1212 thread_list.SetSelectedThreadByID (other_thread->GetID()); 1213 else 1214 { 1215 if (curr_thread && curr_thread->IsValid()) 1216 thread = curr_thread; 1217 else 1218 thread = thread_list.GetThreadAtIndex(0); 1219 1220 if (thread) 1221 thread_list.SetSelectedThreadByID (thread->GetID()); 1222 } 1223 } 1224 } 1225 // Drop the ThreadList mutex by here, since GetThreadStatus below might have to run code, 1226 // e.g. for Data formatters, and if we hold the ThreadList mutex, then the process is going to 1227 // have a hard time restarting the process. 1228 if (stream) 1229 { 1230 Debugger &debugger = process_sp->GetTarget().GetDebugger(); 1231 if (debugger.GetTargetList().GetSelectedTarget().get() == &process_sp->GetTarget()) 1232 { 1233 const bool only_threads_with_stop_reason = true; 1234 const uint32_t start_frame = 0; 1235 const uint32_t num_frames = 1; 1236 const uint32_t num_frames_with_source = 1; 1237 process_sp->GetStatus(*stream); 1238 process_sp->GetThreadStatus (*stream, 1239 only_threads_with_stop_reason, 1240 start_frame, 1241 num_frames, 1242 num_frames_with_source); 1243 } 1244 else 1245 { 1246 uint32_t target_idx = debugger.GetTargetList().GetIndexOfTarget(process_sp->GetTarget().shared_from_this()); 1247 if (target_idx != UINT32_MAX) 1248 stream->Printf ("Target %d: (", target_idx); 1249 else 1250 stream->Printf ("Target <unknown index>: ("); 1251 process_sp->GetTarget().Dump (stream, eDescriptionLevelBrief); 1252 stream->Printf (") stopped.\n"); 1253 } 1254 } 1255 1256 // Pop the process IO handler 1257 pop_process_io_handler = true; 1258 } 1259 break; 1260 } 1261 1262 if (handle_pop && pop_process_io_handler) 1263 process_sp->PopProcessIOHandler(); 1264 1265 return true; 1266 } 1267 1268 StateType 1269 Process::WaitForState(const TimeValue *timeout, 1270 const StateType *match_states, 1271 const uint32_t num_match_states) 1272 { 1273 EventSP event_sp; 1274 uint32_t i; 1275 StateType state = GetState(); 1276 while (state != eStateInvalid) 1277 { 1278 // If we are exited or detached, we won't ever get back to any 1279 // other valid state... 1280 if (state == eStateDetached || state == eStateExited) 1281 return state; 1282 1283 state = WaitForStateChangedEvents (timeout, event_sp, NULL); 1284 1285 for (i=0; i<num_match_states; ++i) 1286 { 1287 if (match_states[i] == state) 1288 return state; 1289 } 1290 } 1291 return state; 1292 } 1293 1294 bool 1295 Process::HijackProcessEvents (Listener *listener) 1296 { 1297 if (listener != NULL) 1298 { 1299 return HijackBroadcaster(listener, eBroadcastBitStateChanged | eBroadcastBitInterrupt); 1300 } 1301 else 1302 return false; 1303 } 1304 1305 void 1306 Process::RestoreProcessEvents () 1307 { 1308 RestoreBroadcaster(); 1309 } 1310 1311 bool 1312 Process::HijackPrivateProcessEvents (Listener *listener) 1313 { 1314 if (listener != NULL) 1315 { 1316 return m_private_state_broadcaster.HijackBroadcaster(listener, eBroadcastBitStateChanged | eBroadcastBitInterrupt); 1317 } 1318 else 1319 return false; 1320 } 1321 1322 void 1323 Process::RestorePrivateProcessEvents () 1324 { 1325 m_private_state_broadcaster.RestoreBroadcaster(); 1326 } 1327 1328 StateType 1329 Process::WaitForStateChangedEvents (const TimeValue *timeout, EventSP &event_sp, Listener *hijack_listener) 1330 { 1331 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1332 1333 if (log) 1334 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, 1335 static_cast<const void*>(timeout)); 1336 1337 Listener *listener = hijack_listener; 1338 if (listener == NULL) 1339 listener = &m_listener; 1340 1341 StateType state = eStateInvalid; 1342 if (listener->WaitForEventForBroadcasterWithType (timeout, 1343 this, 1344 eBroadcastBitStateChanged | eBroadcastBitInterrupt, 1345 event_sp)) 1346 { 1347 if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged) 1348 state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 1349 else if (log) 1350 log->Printf ("Process::%s got no event or was interrupted.", __FUNCTION__); 1351 } 1352 1353 if (log) 1354 log->Printf ("Process::%s (timeout = %p, event_sp) => %s", 1355 __FUNCTION__, static_cast<const void*>(timeout), 1356 StateAsCString(state)); 1357 return state; 1358 } 1359 1360 Event * 1361 Process::PeekAtStateChangedEvents () 1362 { 1363 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1364 1365 if (log) 1366 log->Printf ("Process::%s...", __FUNCTION__); 1367 1368 Event *event_ptr; 1369 event_ptr = m_listener.PeekAtNextEventForBroadcasterWithType (this, 1370 eBroadcastBitStateChanged); 1371 if (log) 1372 { 1373 if (event_ptr) 1374 { 1375 log->Printf ("Process::%s (event_ptr) => %s", 1376 __FUNCTION__, 1377 StateAsCString(ProcessEventData::GetStateFromEvent (event_ptr))); 1378 } 1379 else 1380 { 1381 log->Printf ("Process::%s no events found", 1382 __FUNCTION__); 1383 } 1384 } 1385 return event_ptr; 1386 } 1387 1388 StateType 1389 Process::WaitForStateChangedEventsPrivate (const TimeValue *timeout, EventSP &event_sp) 1390 { 1391 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1392 1393 if (log) 1394 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, 1395 static_cast<const void*>(timeout)); 1396 1397 StateType state = eStateInvalid; 1398 if (m_private_state_listener.WaitForEventForBroadcasterWithType (timeout, 1399 &m_private_state_broadcaster, 1400 eBroadcastBitStateChanged | eBroadcastBitInterrupt, 1401 event_sp)) 1402 if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged) 1403 state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 1404 1405 // This is a bit of a hack, but when we wait here we could very well return 1406 // to the command-line, and that could disable the log, which would render the 1407 // log we got above invalid. 1408 if (log) 1409 log->Printf ("Process::%s (timeout = %p, event_sp) => %s", 1410 __FUNCTION__, static_cast<const void *>(timeout), 1411 state == eStateInvalid ? "TIMEOUT" : StateAsCString(state)); 1412 return state; 1413 } 1414 1415 bool 1416 Process::WaitForEventsPrivate (const TimeValue *timeout, EventSP &event_sp, bool control_only) 1417 { 1418 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1419 1420 if (log) 1421 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, 1422 static_cast<const void*>(timeout)); 1423 1424 if (control_only) 1425 return m_private_state_listener.WaitForEventForBroadcaster(timeout, &m_private_state_control_broadcaster, event_sp); 1426 else 1427 return m_private_state_listener.WaitForEvent(timeout, event_sp); 1428 } 1429 1430 bool 1431 Process::IsRunning () const 1432 { 1433 return StateIsRunningState (m_public_state.GetValue()); 1434 } 1435 1436 int 1437 Process::GetExitStatus () 1438 { 1439 Mutex::Locker locker (m_exit_status_mutex); 1440 1441 if (m_public_state.GetValue() == eStateExited) 1442 return m_exit_status; 1443 return -1; 1444 } 1445 1446 const char * 1447 Process::GetExitDescription () 1448 { 1449 Mutex::Locker locker (m_exit_status_mutex); 1450 1451 if (m_public_state.GetValue() == eStateExited && !m_exit_string.empty()) 1452 return m_exit_string.c_str(); 1453 return NULL; 1454 } 1455 1456 bool 1457 Process::SetExitStatus (int status, const char *cstr) 1458 { 1459 // Use a mutex to protect setting the exit status. 1460 Mutex::Locker locker (m_exit_status_mutex); 1461 1462 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1463 if (log) 1464 log->Printf("Process::SetExitStatus (status=%i (0x%8.8x), description=%s%s%s)", 1465 status, status, 1466 cstr ? "\"" : "", 1467 cstr ? cstr : "NULL", 1468 cstr ? "\"" : ""); 1469 1470 // We were already in the exited state 1471 if (m_private_state.GetValue() == eStateExited) 1472 { 1473 if (log) 1474 log->Printf("Process::SetExitStatus () ignoring exit status because state was already set to eStateExited"); 1475 return false; 1476 } 1477 1478 m_exit_status = status; 1479 if (cstr) 1480 m_exit_string = cstr; 1481 else 1482 m_exit_string.clear(); 1483 1484 // When we exit, we don't need the input reader anymore 1485 if (m_process_input_reader) 1486 { 1487 m_process_input_reader->SetIsDone(true); 1488 m_process_input_reader->Cancel(); 1489 m_process_input_reader.reset(); 1490 } 1491 1492 // Clear the last natural stop ID since it has a strong 1493 // reference to this process 1494 m_mod_id.SetStopEventForLastNaturalStopID(EventSP()); 1495 1496 SetPrivateState (eStateExited); 1497 1498 // Allow subclasses to do some cleanup 1499 DidExit (); 1500 1501 return true; 1502 } 1503 1504 // This static callback can be used to watch for local child processes on 1505 // the current host. The child process exits, the process will be 1506 // found in the global target list (we want to be completely sure that the 1507 // lldb_private::Process doesn't go away before we can deliver the signal. 1508 bool 1509 Process::SetProcessExitStatus (void *callback_baton, 1510 lldb::pid_t pid, 1511 bool exited, 1512 int signo, // Zero for no signal 1513 int exit_status // Exit value of process if signal is zero 1514 ) 1515 { 1516 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 1517 if (log) 1518 log->Printf ("Process::SetProcessExitStatus (baton=%p, pid=%" PRIu64 ", exited=%i, signal=%i, exit_status=%i)\n", 1519 callback_baton, 1520 pid, 1521 exited, 1522 signo, 1523 exit_status); 1524 1525 if (exited) 1526 { 1527 TargetSP target_sp(Debugger::FindTargetWithProcessID (pid)); 1528 if (target_sp) 1529 { 1530 ProcessSP process_sp (target_sp->GetProcessSP()); 1531 if (process_sp) 1532 { 1533 const char *signal_cstr = NULL; 1534 if (signo) 1535 signal_cstr = process_sp->GetUnixSignals()->GetSignalAsCString(signo); 1536 1537 process_sp->SetExitStatus (exit_status, signal_cstr); 1538 } 1539 } 1540 return true; 1541 } 1542 return false; 1543 } 1544 1545 void 1546 Process::UpdateThreadListIfNeeded () 1547 { 1548 const uint32_t stop_id = GetStopID(); 1549 if (m_thread_list.GetSize(false) == 0 || stop_id != m_thread_list.GetStopID()) 1550 { 1551 const StateType state = GetPrivateState(); 1552 if (StateIsStoppedState (state, true)) 1553 { 1554 Mutex::Locker locker (m_thread_list.GetMutex ()); 1555 // m_thread_list does have its own mutex, but we need to 1556 // hold onto the mutex between the call to UpdateThreadList(...) 1557 // and the os->UpdateThreadList(...) so it doesn't change on us 1558 ThreadList &old_thread_list = m_thread_list; 1559 ThreadList real_thread_list(this); 1560 ThreadList new_thread_list(this); 1561 // Always update the thread list with the protocol specific 1562 // thread list, but only update if "true" is returned 1563 if (UpdateThreadList (m_thread_list_real, real_thread_list)) 1564 { 1565 // Don't call into the OperatingSystem to update the thread list if we are shutting down, since 1566 // that may call back into the SBAPI's, requiring the API lock which is already held by whoever is 1567 // shutting us down, causing a deadlock. 1568 OperatingSystem *os = GetOperatingSystem (); 1569 if (os && !m_destroy_in_process) 1570 { 1571 // Clear any old backing threads where memory threads might have been 1572 // backed by actual threads from the lldb_private::Process subclass 1573 size_t num_old_threads = old_thread_list.GetSize(false); 1574 for (size_t i=0; i<num_old_threads; ++i) 1575 old_thread_list.GetThreadAtIndex(i, false)->ClearBackingThread(); 1576 1577 // Turn off dynamic types to ensure we don't run any expressions. Objective C 1578 // can run an expression to determine if a SBValue is a dynamic type or not 1579 // and we need to avoid this. OperatingSystem plug-ins can't run expressions 1580 // that require running code... 1581 1582 Target &target = GetTarget(); 1583 const lldb::DynamicValueType saved_prefer_dynamic = target.GetPreferDynamicValue (); 1584 if (saved_prefer_dynamic != lldb::eNoDynamicValues) 1585 target.SetPreferDynamicValue(lldb::eNoDynamicValues); 1586 1587 // Now let the OperatingSystem plug-in update the thread list 1588 1589 os->UpdateThreadList (old_thread_list, // Old list full of threads created by OS plug-in 1590 real_thread_list, // The actual thread list full of threads created by each lldb_private::Process subclass 1591 new_thread_list); // The new thread list that we will show to the user that gets filled in 1592 1593 if (saved_prefer_dynamic != lldb::eNoDynamicValues) 1594 target.SetPreferDynamicValue(saved_prefer_dynamic); 1595 } 1596 else 1597 { 1598 // No OS plug-in, the new thread list is the same as the real thread list 1599 new_thread_list = real_thread_list; 1600 } 1601 1602 m_thread_list_real.Update(real_thread_list); 1603 m_thread_list.Update (new_thread_list); 1604 m_thread_list.SetStopID (stop_id); 1605 1606 if (GetLastNaturalStopID () != m_extended_thread_stop_id) 1607 { 1608 // Clear any extended threads that we may have accumulated previously 1609 m_extended_thread_list.Clear(); 1610 m_extended_thread_stop_id = GetLastNaturalStopID (); 1611 1612 m_queue_list.Clear(); 1613 m_queue_list_stop_id = GetLastNaturalStopID (); 1614 } 1615 } 1616 } 1617 } 1618 } 1619 1620 void 1621 Process::UpdateQueueListIfNeeded () 1622 { 1623 if (m_system_runtime_ap.get()) 1624 { 1625 if (m_queue_list.GetSize() == 0 || m_queue_list_stop_id != GetLastNaturalStopID()) 1626 { 1627 const StateType state = GetPrivateState(); 1628 if (StateIsStoppedState (state, true)) 1629 { 1630 m_system_runtime_ap->PopulateQueueList (m_queue_list); 1631 m_queue_list_stop_id = GetLastNaturalStopID(); 1632 } 1633 } 1634 } 1635 } 1636 1637 ThreadSP 1638 Process::CreateOSPluginThread (lldb::tid_t tid, lldb::addr_t context) 1639 { 1640 OperatingSystem *os = GetOperatingSystem (); 1641 if (os) 1642 return os->CreateThread(tid, context); 1643 return ThreadSP(); 1644 } 1645 1646 uint32_t 1647 Process::GetNextThreadIndexID (uint64_t thread_id) 1648 { 1649 return AssignIndexIDToThread(thread_id); 1650 } 1651 1652 bool 1653 Process::HasAssignedIndexIDToThread(uint64_t thread_id) 1654 { 1655 return (m_thread_id_to_index_id_map.find(thread_id) != m_thread_id_to_index_id_map.end()); 1656 } 1657 1658 uint32_t 1659 Process::AssignIndexIDToThread(uint64_t thread_id) 1660 { 1661 uint32_t result = 0; 1662 std::map<uint64_t, uint32_t>::iterator iterator = m_thread_id_to_index_id_map.find(thread_id); 1663 if (iterator == m_thread_id_to_index_id_map.end()) 1664 { 1665 result = ++m_thread_index_id; 1666 m_thread_id_to_index_id_map[thread_id] = result; 1667 } 1668 else 1669 { 1670 result = iterator->second; 1671 } 1672 1673 return result; 1674 } 1675 1676 StateType 1677 Process::GetState() 1678 { 1679 // If any other threads access this we will need a mutex for it 1680 return m_public_state.GetValue (); 1681 } 1682 1683 bool 1684 Process::StateChangedIsExternallyHijacked() 1685 { 1686 if (IsHijackedForEvent(eBroadcastBitStateChanged)) 1687 { 1688 if (strcmp(m_hijacking_listeners.back()->GetName(), "lldb.Process.ResumeSynchronous.hijack")) 1689 return true; 1690 } 1691 return false; 1692 } 1693 1694 void 1695 Process::SetPublicState (StateType new_state, bool restarted) 1696 { 1697 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1698 if (log) 1699 log->Printf("Process::SetPublicState (state = %s, restarted = %i)", StateAsCString(new_state), restarted); 1700 const StateType old_state = m_public_state.GetValue(); 1701 m_public_state.SetValue (new_state); 1702 1703 // On the transition from Run to Stopped, we unlock the writer end of the 1704 // run lock. The lock gets locked in Resume, which is the public API 1705 // to tell the program to run. 1706 if (!StateChangedIsExternallyHijacked()) 1707 { 1708 if (new_state == eStateDetached) 1709 { 1710 if (log) 1711 log->Printf("Process::SetPublicState (%s) -- unlocking run lock for detach", StateAsCString(new_state)); 1712 m_public_run_lock.SetStopped(); 1713 } 1714 else 1715 { 1716 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1717 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1718 if ((old_state_is_stopped != new_state_is_stopped)) 1719 { 1720 if (new_state_is_stopped && !restarted) 1721 { 1722 if (log) 1723 log->Printf("Process::SetPublicState (%s) -- unlocking run lock", StateAsCString(new_state)); 1724 m_public_run_lock.SetStopped(); 1725 } 1726 } 1727 } 1728 } 1729 } 1730 1731 Error 1732 Process::Resume () 1733 { 1734 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1735 if (log) 1736 log->Printf("Process::Resume -- locking run lock"); 1737 if (!m_public_run_lock.TrySetRunning()) 1738 { 1739 Error error("Resume request failed - process still running."); 1740 if (log) 1741 log->Printf ("Process::Resume: -- TrySetRunning failed, not resuming."); 1742 return error; 1743 } 1744 return PrivateResume(); 1745 } 1746 1747 Error 1748 Process::ResumeSynchronous (Stream *stream) 1749 { 1750 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1751 if (log) 1752 log->Printf("Process::ResumeSynchronous -- locking run lock"); 1753 if (!m_public_run_lock.TrySetRunning()) 1754 { 1755 Error error("Resume request failed - process still running."); 1756 if (log) 1757 log->Printf ("Process::Resume: -- TrySetRunning failed, not resuming."); 1758 return error; 1759 } 1760 1761 ListenerSP listener_sp (new Listener("lldb.Process.ResumeSynchronous.hijack")); 1762 HijackProcessEvents(listener_sp.get()); 1763 1764 Error error = PrivateResume(); 1765 if (error.Success()) 1766 { 1767 StateType state = WaitForProcessToStop (NULL, NULL, true, listener_sp.get(), stream); 1768 const bool must_be_alive = false; // eStateExited is ok, so this must be false 1769 if (!StateIsStoppedState(state, must_be_alive)) 1770 error.SetErrorStringWithFormat("process not in stopped state after synchronous resume: %s", StateAsCString(state)); 1771 } 1772 1773 // Undo the hijacking of process events... 1774 RestoreProcessEvents(); 1775 1776 return error; 1777 } 1778 1779 StateType 1780 Process::GetPrivateState () 1781 { 1782 return m_private_state.GetValue(); 1783 } 1784 1785 void 1786 Process::SetPrivateState (StateType new_state) 1787 { 1788 if (m_finalize_called) 1789 return; 1790 1791 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1792 bool state_changed = false; 1793 1794 if (log) 1795 log->Printf("Process::SetPrivateState (%s)", StateAsCString(new_state)); 1796 1797 Mutex::Locker thread_locker(m_thread_list.GetMutex()); 1798 Mutex::Locker locker(m_private_state.GetMutex()); 1799 1800 const StateType old_state = m_private_state.GetValueNoLock (); 1801 state_changed = old_state != new_state; 1802 1803 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1804 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1805 if (old_state_is_stopped != new_state_is_stopped) 1806 { 1807 if (new_state_is_stopped) 1808 m_private_run_lock.SetStopped(); 1809 else 1810 m_private_run_lock.SetRunning(); 1811 } 1812 1813 if (state_changed) 1814 { 1815 m_private_state.SetValueNoLock (new_state); 1816 EventSP event_sp (new Event (eBroadcastBitStateChanged, new ProcessEventData (shared_from_this(), new_state))); 1817 if (StateIsStoppedState(new_state, false)) 1818 { 1819 // Note, this currently assumes that all threads in the list 1820 // stop when the process stops. In the future we will want to 1821 // support a debugging model where some threads continue to run 1822 // while others are stopped. When that happens we will either need 1823 // a way for the thread list to identify which threads are stopping 1824 // or create a special thread list containing only threads which 1825 // actually stopped. 1826 // 1827 // The process plugin is responsible for managing the actual 1828 // behavior of the threads and should have stopped any threads 1829 // that are going to stop before we get here. 1830 m_thread_list.DidStop(); 1831 1832 m_mod_id.BumpStopID(); 1833 if (!m_mod_id.IsLastResumeForUserExpression()) 1834 m_mod_id.SetStopEventForLastNaturalStopID(event_sp); 1835 m_memory_cache.Clear(); 1836 if (log) 1837 log->Printf("Process::SetPrivateState (%s) stop_id = %u", StateAsCString(new_state), m_mod_id.GetStopID()); 1838 } 1839 1840 // Use our target to get a shared pointer to ourselves... 1841 if (m_finalize_called && PrivateStateThreadIsValid() == false) 1842 BroadcastEvent (event_sp); 1843 else 1844 m_private_state_broadcaster.BroadcastEvent (event_sp); 1845 } 1846 else 1847 { 1848 if (log) 1849 log->Printf("Process::SetPrivateState (%s) state didn't change. Ignoring...", StateAsCString(new_state)); 1850 } 1851 } 1852 1853 void 1854 Process::SetRunningUserExpression (bool on) 1855 { 1856 m_mod_id.SetRunningUserExpression (on); 1857 } 1858 1859 addr_t 1860 Process::GetImageInfoAddress() 1861 { 1862 return LLDB_INVALID_ADDRESS; 1863 } 1864 1865 //---------------------------------------------------------------------- 1866 // LoadImage 1867 // 1868 // This function provides a default implementation that works for most 1869 // unix variants. Any Process subclasses that need to do shared library 1870 // loading differently should override LoadImage and UnloadImage and 1871 // do what is needed. 1872 //---------------------------------------------------------------------- 1873 uint32_t 1874 Process::LoadImage (const FileSpec &image_spec, Error &error) 1875 { 1876 if (m_finalizing) 1877 { 1878 error.SetErrorString("process is tearing itself down"); 1879 return LLDB_INVALID_IMAGE_TOKEN; 1880 } 1881 1882 char path[PATH_MAX]; 1883 image_spec.GetPath(path, sizeof(path)); 1884 1885 DynamicLoader *loader = GetDynamicLoader(); 1886 if (loader) 1887 { 1888 error = loader->CanLoadImage(); 1889 if (error.Fail()) 1890 return LLDB_INVALID_IMAGE_TOKEN; 1891 } 1892 1893 if (error.Success()) 1894 { 1895 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 1896 1897 if (thread_sp) 1898 { 1899 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 1900 1901 if (frame_sp) 1902 { 1903 ExecutionContext exe_ctx; 1904 frame_sp->CalculateExecutionContext (exe_ctx); 1905 EvaluateExpressionOptions expr_options; 1906 expr_options.SetUnwindOnError(true); 1907 expr_options.SetIgnoreBreakpoints(true); 1908 expr_options.SetExecutionPolicy(eExecutionPolicyAlways); 1909 expr_options.SetResultIsInternal(true); 1910 expr_options.SetLanguage(eLanguageTypeC_plus_plus); 1911 1912 StreamString expr; 1913 expr.Printf(R"( 1914 struct __lldb_dlopen_result { void *image_ptr; const char *error_str; } the_result; 1915 the_result.image_ptr = dlopen ("%s", 2); 1916 if (the_result.image_ptr == (void *) 0x0) 1917 { 1918 the_result.error_str = dlerror(); 1919 } 1920 else 1921 { 1922 the_result.error_str = (const char *) 0x0; 1923 } 1924 the_result; 1925 )", 1926 path); 1927 const char *prefix = R"( 1928 extern "C" void* dlopen (const char *path, int mode); 1929 extern "C" const char *dlerror (void); 1930 )"; 1931 lldb::ValueObjectSP result_valobj_sp; 1932 Error expr_error; 1933 UserExpression::Evaluate (exe_ctx, 1934 expr_options, 1935 expr.GetData(), 1936 prefix, 1937 result_valobj_sp, 1938 expr_error); 1939 if (expr_error.Success()) 1940 { 1941 error = result_valobj_sp->GetError(); 1942 if (error.Success()) 1943 { 1944 Scalar scalar; 1945 ValueObjectSP image_ptr_sp = result_valobj_sp->GetChildAtIndex(0, true); 1946 if (image_ptr_sp && image_ptr_sp->ResolveValue (scalar)) 1947 { 1948 addr_t image_ptr = scalar.ULongLong(LLDB_INVALID_ADDRESS); 1949 if (image_ptr != 0 && image_ptr != LLDB_INVALID_ADDRESS) 1950 { 1951 uint32_t image_token = m_image_tokens.size(); 1952 m_image_tokens.push_back (image_ptr); 1953 return image_token; 1954 } 1955 else if (image_ptr == 0) 1956 { 1957 ValueObjectSP error_str_sp = result_valobj_sp->GetChildAtIndex(1, true); 1958 if (error_str_sp) 1959 { 1960 if (error_str_sp->IsCStringContainer(true)) 1961 { 1962 DataBufferSP buffer_sp(new DataBufferHeap(10240,0)); 1963 size_t num_chars = error_str_sp->ReadPointedString (buffer_sp, error, 10240).first; 1964 if (error.Success() && num_chars > 0) 1965 { 1966 error.Clear(); 1967 error.SetErrorStringWithFormat("dlopen error: %s", buffer_sp->GetBytes()); 1968 } 1969 else 1970 { 1971 error.Clear(); 1972 error.SetErrorStringWithFormat("dlopen failed for unknown reasons."); 1973 } 1974 } 1975 } 1976 } 1977 } 1978 } 1979 } 1980 else 1981 error = expr_error; 1982 } 1983 } 1984 } 1985 if (!error.AsCString()) 1986 error.SetErrorStringWithFormat("unable to load '%s'", path); 1987 return LLDB_INVALID_IMAGE_TOKEN; 1988 } 1989 1990 //---------------------------------------------------------------------- 1991 // UnloadImage 1992 // 1993 // This function provides a default implementation that works for most 1994 // unix variants. Any Process subclasses that need to do shared library 1995 // loading differently should override LoadImage and UnloadImage and 1996 // do what is needed. 1997 //---------------------------------------------------------------------- 1998 Error 1999 Process::UnloadImage (uint32_t image_token) 2000 { 2001 Error error; 2002 2003 if (m_finalizing) 2004 { 2005 error.SetErrorString("process is tearing itself down"); 2006 return error; 2007 } 2008 2009 if (image_token < m_image_tokens.size()) 2010 { 2011 const addr_t image_addr = m_image_tokens[image_token]; 2012 if (image_addr == LLDB_INVALID_ADDRESS) 2013 { 2014 error.SetErrorString("image already unloaded"); 2015 } 2016 else 2017 { 2018 DynamicLoader *loader = GetDynamicLoader(); 2019 if (loader) 2020 error = loader->CanLoadImage(); 2021 2022 if (error.Success()) 2023 { 2024 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 2025 2026 if (thread_sp) 2027 { 2028 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 2029 2030 if (frame_sp) 2031 { 2032 ExecutionContext exe_ctx; 2033 frame_sp->CalculateExecutionContext (exe_ctx); 2034 EvaluateExpressionOptions expr_options; 2035 expr_options.SetUnwindOnError(true); 2036 expr_options.SetIgnoreBreakpoints(true); 2037 expr_options.SetExecutionPolicy(eExecutionPolicyAlways); 2038 expr_options.SetLanguage(eLanguageTypeC_plus_plus); 2039 2040 StreamString expr; 2041 expr.Printf("dlclose ((void *)0x%" PRIx64 ")", image_addr); 2042 const char *prefix = "extern \"C\" int dlclose(void* handle);\n"; 2043 lldb::ValueObjectSP result_valobj_sp; 2044 Error expr_error; 2045 UserExpression::Evaluate (exe_ctx, 2046 expr_options, 2047 expr.GetData(), 2048 prefix, 2049 result_valobj_sp, 2050 expr_error); 2051 if (result_valobj_sp->GetError().Success()) 2052 { 2053 Scalar scalar; 2054 if (result_valobj_sp->ResolveValue (scalar)) 2055 { 2056 if (scalar.UInt(1)) 2057 { 2058 error.SetErrorStringWithFormat("expression failed: \"%s\"", expr.GetData()); 2059 } 2060 else 2061 { 2062 m_image_tokens[image_token] = LLDB_INVALID_ADDRESS; 2063 } 2064 } 2065 } 2066 else 2067 { 2068 error = result_valobj_sp->GetError(); 2069 } 2070 } 2071 } 2072 } 2073 } 2074 } 2075 else 2076 { 2077 error.SetErrorString("invalid image token"); 2078 } 2079 return error; 2080 } 2081 2082 const lldb::ABISP & 2083 Process::GetABI() 2084 { 2085 if (!m_abi_sp) 2086 m_abi_sp = ABI::FindPlugin(GetTarget().GetArchitecture()); 2087 return m_abi_sp; 2088 } 2089 2090 LanguageRuntime * 2091 Process::GetLanguageRuntime(lldb::LanguageType language, bool retry_if_null) 2092 { 2093 if (m_finalizing) 2094 return nullptr; 2095 2096 LanguageRuntimeCollection::iterator pos; 2097 pos = m_language_runtimes.find (language); 2098 if (pos == m_language_runtimes.end() || (retry_if_null && !(*pos).second)) 2099 { 2100 lldb::LanguageRuntimeSP runtime_sp(LanguageRuntime::FindPlugin(this, language)); 2101 2102 m_language_runtimes[language] = runtime_sp; 2103 return runtime_sp.get(); 2104 } 2105 else 2106 return (*pos).second.get(); 2107 } 2108 2109 CPPLanguageRuntime * 2110 Process::GetCPPLanguageRuntime (bool retry_if_null) 2111 { 2112 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeC_plus_plus, retry_if_null); 2113 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeC_plus_plus) 2114 return static_cast<CPPLanguageRuntime *> (runtime); 2115 return NULL; 2116 } 2117 2118 ObjCLanguageRuntime * 2119 Process::GetObjCLanguageRuntime (bool retry_if_null) 2120 { 2121 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeObjC, retry_if_null); 2122 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeObjC) 2123 return static_cast<ObjCLanguageRuntime *> (runtime); 2124 return NULL; 2125 } 2126 2127 bool 2128 Process::IsPossibleDynamicValue (ValueObject& in_value) 2129 { 2130 if (m_finalizing) 2131 return false; 2132 2133 if (in_value.IsDynamic()) 2134 return false; 2135 LanguageType known_type = in_value.GetObjectRuntimeLanguage(); 2136 2137 if (known_type != eLanguageTypeUnknown && known_type != eLanguageTypeC) 2138 { 2139 LanguageRuntime *runtime = GetLanguageRuntime (known_type); 2140 return runtime ? runtime->CouldHaveDynamicValue(in_value) : false; 2141 } 2142 2143 LanguageRuntime *cpp_runtime = GetLanguageRuntime (eLanguageTypeC_plus_plus); 2144 if (cpp_runtime && cpp_runtime->CouldHaveDynamicValue(in_value)) 2145 return true; 2146 2147 LanguageRuntime *objc_runtime = GetLanguageRuntime (eLanguageTypeObjC); 2148 return objc_runtime ? objc_runtime->CouldHaveDynamicValue(in_value) : false; 2149 } 2150 2151 void 2152 Process::SetDynamicCheckers(DynamicCheckerFunctions *dynamic_checkers) 2153 { 2154 m_dynamic_checkers_ap.reset(dynamic_checkers); 2155 } 2156 2157 BreakpointSiteList & 2158 Process::GetBreakpointSiteList() 2159 { 2160 return m_breakpoint_site_list; 2161 } 2162 2163 const BreakpointSiteList & 2164 Process::GetBreakpointSiteList() const 2165 { 2166 return m_breakpoint_site_list; 2167 } 2168 2169 void 2170 Process::DisableAllBreakpointSites () 2171 { 2172 m_breakpoint_site_list.ForEach([this](BreakpointSite *bp_site) -> void { 2173 // bp_site->SetEnabled(true); 2174 DisableBreakpointSite(bp_site); 2175 }); 2176 } 2177 2178 Error 2179 Process::ClearBreakpointSiteByID (lldb::user_id_t break_id) 2180 { 2181 Error error (DisableBreakpointSiteByID (break_id)); 2182 2183 if (error.Success()) 2184 m_breakpoint_site_list.Remove(break_id); 2185 2186 return error; 2187 } 2188 2189 Error 2190 Process::DisableBreakpointSiteByID (lldb::user_id_t break_id) 2191 { 2192 Error error; 2193 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2194 if (bp_site_sp) 2195 { 2196 if (bp_site_sp->IsEnabled()) 2197 error = DisableBreakpointSite (bp_site_sp.get()); 2198 } 2199 else 2200 { 2201 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2202 } 2203 2204 return error; 2205 } 2206 2207 Error 2208 Process::EnableBreakpointSiteByID (lldb::user_id_t break_id) 2209 { 2210 Error error; 2211 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2212 if (bp_site_sp) 2213 { 2214 if (!bp_site_sp->IsEnabled()) 2215 error = EnableBreakpointSite (bp_site_sp.get()); 2216 } 2217 else 2218 { 2219 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2220 } 2221 return error; 2222 } 2223 2224 lldb::break_id_t 2225 Process::CreateBreakpointSite (const BreakpointLocationSP &owner, bool use_hardware) 2226 { 2227 addr_t load_addr = LLDB_INVALID_ADDRESS; 2228 2229 bool show_error = true; 2230 switch (GetState()) 2231 { 2232 case eStateInvalid: 2233 case eStateUnloaded: 2234 case eStateConnected: 2235 case eStateAttaching: 2236 case eStateLaunching: 2237 case eStateDetached: 2238 case eStateExited: 2239 show_error = false; 2240 break; 2241 2242 case eStateStopped: 2243 case eStateRunning: 2244 case eStateStepping: 2245 case eStateCrashed: 2246 case eStateSuspended: 2247 show_error = IsAlive(); 2248 break; 2249 } 2250 2251 // Reset the IsIndirect flag here, in case the location changes from 2252 // pointing to a indirect symbol to a regular symbol. 2253 owner->SetIsIndirect (false); 2254 2255 if (owner->ShouldResolveIndirectFunctions()) 2256 { 2257 Symbol *symbol = owner->GetAddress().CalculateSymbolContextSymbol(); 2258 if (symbol && symbol->IsIndirect()) 2259 { 2260 Error error; 2261 Address symbol_address = symbol->GetAddress(); 2262 load_addr = ResolveIndirectFunction (&symbol_address, error); 2263 if (!error.Success() && show_error) 2264 { 2265 GetTarget().GetDebugger().GetErrorFile()->Printf ("warning: failed to resolve indirect function at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2266 symbol->GetLoadAddress(&GetTarget()), 2267 owner->GetBreakpoint().GetID(), 2268 owner->GetID(), 2269 error.AsCString() ? error.AsCString() : "unknown error"); 2270 return LLDB_INVALID_BREAK_ID; 2271 } 2272 Address resolved_address(load_addr); 2273 load_addr = resolved_address.GetOpcodeLoadAddress (&GetTarget()); 2274 owner->SetIsIndirect(true); 2275 } 2276 else 2277 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&GetTarget()); 2278 } 2279 else 2280 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&GetTarget()); 2281 2282 if (load_addr != LLDB_INVALID_ADDRESS) 2283 { 2284 BreakpointSiteSP bp_site_sp; 2285 2286 // Look up this breakpoint site. If it exists, then add this new owner, otherwise 2287 // create a new breakpoint site and add it. 2288 2289 bp_site_sp = m_breakpoint_site_list.FindByAddress (load_addr); 2290 2291 if (bp_site_sp) 2292 { 2293 bp_site_sp->AddOwner (owner); 2294 owner->SetBreakpointSite (bp_site_sp); 2295 return bp_site_sp->GetID(); 2296 } 2297 else 2298 { 2299 bp_site_sp.reset (new BreakpointSite (&m_breakpoint_site_list, owner, load_addr, use_hardware)); 2300 if (bp_site_sp) 2301 { 2302 Error error = EnableBreakpointSite (bp_site_sp.get()); 2303 if (error.Success()) 2304 { 2305 owner->SetBreakpointSite (bp_site_sp); 2306 return m_breakpoint_site_list.Add (bp_site_sp); 2307 } 2308 else 2309 { 2310 if (show_error) 2311 { 2312 // Report error for setting breakpoint... 2313 GetTarget().GetDebugger().GetErrorFile()->Printf ("warning: failed to set breakpoint site at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2314 load_addr, 2315 owner->GetBreakpoint().GetID(), 2316 owner->GetID(), 2317 error.AsCString() ? error.AsCString() : "unknown error"); 2318 } 2319 } 2320 } 2321 } 2322 } 2323 // We failed to enable the breakpoint 2324 return LLDB_INVALID_BREAK_ID; 2325 } 2326 2327 void 2328 Process::RemoveOwnerFromBreakpointSite (lldb::user_id_t owner_id, lldb::user_id_t owner_loc_id, BreakpointSiteSP &bp_site_sp) 2329 { 2330 uint32_t num_owners = bp_site_sp->RemoveOwner (owner_id, owner_loc_id); 2331 if (num_owners == 0) 2332 { 2333 // Don't try to disable the site if we don't have a live process anymore. 2334 if (IsAlive()) 2335 DisableBreakpointSite (bp_site_sp.get()); 2336 m_breakpoint_site_list.RemoveByAddress(bp_site_sp->GetLoadAddress()); 2337 } 2338 } 2339 2340 size_t 2341 Process::RemoveBreakpointOpcodesFromBuffer (addr_t bp_addr, size_t size, uint8_t *buf) const 2342 { 2343 size_t bytes_removed = 0; 2344 BreakpointSiteList bp_sites_in_range; 2345 2346 if (m_breakpoint_site_list.FindInRange (bp_addr, bp_addr + size, bp_sites_in_range)) 2347 { 2348 bp_sites_in_range.ForEach([bp_addr, size, buf, &bytes_removed](BreakpointSite *bp_site) -> void { 2349 if (bp_site->GetType() == BreakpointSite::eSoftware) 2350 { 2351 addr_t intersect_addr; 2352 size_t intersect_size; 2353 size_t opcode_offset; 2354 if (bp_site->IntersectsRange(bp_addr, size, &intersect_addr, &intersect_size, &opcode_offset)) 2355 { 2356 assert(bp_addr <= intersect_addr && intersect_addr < bp_addr + size); 2357 assert(bp_addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= bp_addr + size); 2358 assert(opcode_offset + intersect_size <= bp_site->GetByteSize()); 2359 size_t buf_offset = intersect_addr - bp_addr; 2360 ::memcpy(buf + buf_offset, bp_site->GetSavedOpcodeBytes() + opcode_offset, intersect_size); 2361 } 2362 } 2363 }); 2364 } 2365 return bytes_removed; 2366 } 2367 2368 size_t 2369 Process::GetSoftwareBreakpointTrapOpcode (BreakpointSite* bp_site) 2370 { 2371 PlatformSP platform_sp (GetTarget().GetPlatform()); 2372 if (platform_sp) 2373 return platform_sp->GetSoftwareBreakpointTrapOpcode (GetTarget(), bp_site); 2374 return 0; 2375 } 2376 2377 Error 2378 Process::EnableSoftwareBreakpoint (BreakpointSite *bp_site) 2379 { 2380 Error error; 2381 assert (bp_site != NULL); 2382 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2383 const addr_t bp_addr = bp_site->GetLoadAddress(); 2384 if (log) 2385 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64, bp_site->GetID(), (uint64_t)bp_addr); 2386 if (bp_site->IsEnabled()) 2387 { 2388 if (log) 2389 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already enabled", bp_site->GetID(), (uint64_t)bp_addr); 2390 return error; 2391 } 2392 2393 if (bp_addr == LLDB_INVALID_ADDRESS) 2394 { 2395 error.SetErrorString("BreakpointSite contains an invalid load address."); 2396 return error; 2397 } 2398 // Ask the lldb::Process subclass to fill in the correct software breakpoint 2399 // trap for the breakpoint site 2400 const size_t bp_opcode_size = GetSoftwareBreakpointTrapOpcode(bp_site); 2401 2402 if (bp_opcode_size == 0) 2403 { 2404 error.SetErrorStringWithFormat ("Process::GetSoftwareBreakpointTrapOpcode() returned zero, unable to get breakpoint trap for address 0x%" PRIx64, bp_addr); 2405 } 2406 else 2407 { 2408 const uint8_t * const bp_opcode_bytes = bp_site->GetTrapOpcodeBytes(); 2409 2410 if (bp_opcode_bytes == NULL) 2411 { 2412 error.SetErrorString ("BreakpointSite doesn't contain a valid breakpoint trap opcode."); 2413 return error; 2414 } 2415 2416 // Save the original opcode by reading it 2417 if (DoReadMemory(bp_addr, bp_site->GetSavedOpcodeBytes(), bp_opcode_size, error) == bp_opcode_size) 2418 { 2419 // Write a software breakpoint in place of the original opcode 2420 if (DoWriteMemory(bp_addr, bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2421 { 2422 uint8_t verify_bp_opcode_bytes[64]; 2423 if (DoReadMemory(bp_addr, verify_bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2424 { 2425 if (::memcmp(bp_opcode_bytes, verify_bp_opcode_bytes, bp_opcode_size) == 0) 2426 { 2427 bp_site->SetEnabled(true); 2428 bp_site->SetType (BreakpointSite::eSoftware); 2429 if (log) 2430 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", 2431 bp_site->GetID(), 2432 (uint64_t)bp_addr); 2433 } 2434 else 2435 error.SetErrorString("failed to verify the breakpoint trap in memory."); 2436 } 2437 else 2438 error.SetErrorString("Unable to read memory to verify breakpoint trap."); 2439 } 2440 else 2441 error.SetErrorString("Unable to write breakpoint trap to memory."); 2442 } 2443 else 2444 error.SetErrorString("Unable to read memory at breakpoint address."); 2445 } 2446 if (log && error.Fail()) 2447 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2448 bp_site->GetID(), 2449 (uint64_t)bp_addr, 2450 error.AsCString()); 2451 return error; 2452 } 2453 2454 Error 2455 Process::DisableSoftwareBreakpoint (BreakpointSite *bp_site) 2456 { 2457 Error error; 2458 assert (bp_site != NULL); 2459 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2460 addr_t bp_addr = bp_site->GetLoadAddress(); 2461 lldb::user_id_t breakID = bp_site->GetID(); 2462 if (log) 2463 log->Printf ("Process::DisableSoftwareBreakpoint (breakID = %" PRIu64 ") addr = 0x%" PRIx64, breakID, (uint64_t)bp_addr); 2464 2465 if (bp_site->IsHardware()) 2466 { 2467 error.SetErrorString("Breakpoint site is a hardware breakpoint."); 2468 } 2469 else if (bp_site->IsEnabled()) 2470 { 2471 const size_t break_op_size = bp_site->GetByteSize(); 2472 const uint8_t * const break_op = bp_site->GetTrapOpcodeBytes(); 2473 if (break_op_size > 0) 2474 { 2475 // Clear a software breakpoint instruction 2476 uint8_t curr_break_op[8]; 2477 assert (break_op_size <= sizeof(curr_break_op)); 2478 bool break_op_found = false; 2479 2480 // Read the breakpoint opcode 2481 if (DoReadMemory (bp_addr, curr_break_op, break_op_size, error) == break_op_size) 2482 { 2483 bool verify = false; 2484 // Make sure the breakpoint opcode exists at this address 2485 if (::memcmp (curr_break_op, break_op, break_op_size) == 0) 2486 { 2487 break_op_found = true; 2488 // We found a valid breakpoint opcode at this address, now restore 2489 // the saved opcode. 2490 if (DoWriteMemory (bp_addr, bp_site->GetSavedOpcodeBytes(), break_op_size, error) == break_op_size) 2491 { 2492 verify = true; 2493 } 2494 else 2495 error.SetErrorString("Memory write failed when restoring original opcode."); 2496 } 2497 else 2498 { 2499 error.SetErrorString("Original breakpoint trap is no longer in memory."); 2500 // Set verify to true and so we can check if the original opcode has already been restored 2501 verify = true; 2502 } 2503 2504 if (verify) 2505 { 2506 uint8_t verify_opcode[8]; 2507 assert (break_op_size < sizeof(verify_opcode)); 2508 // Verify that our original opcode made it back to the inferior 2509 if (DoReadMemory (bp_addr, verify_opcode, break_op_size, error) == break_op_size) 2510 { 2511 // compare the memory we just read with the original opcode 2512 if (::memcmp (bp_site->GetSavedOpcodeBytes(), verify_opcode, break_op_size) == 0) 2513 { 2514 // SUCCESS 2515 bp_site->SetEnabled(false); 2516 if (log) 2517 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", bp_site->GetID(), (uint64_t)bp_addr); 2518 return error; 2519 } 2520 else 2521 { 2522 if (break_op_found) 2523 error.SetErrorString("Failed to restore original opcode."); 2524 } 2525 } 2526 else 2527 error.SetErrorString("Failed to read memory to verify that breakpoint trap was restored."); 2528 } 2529 } 2530 else 2531 error.SetErrorString("Unable to read memory that should contain the breakpoint trap."); 2532 } 2533 } 2534 else 2535 { 2536 if (log) 2537 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already disabled", bp_site->GetID(), (uint64_t)bp_addr); 2538 return error; 2539 } 2540 2541 if (log) 2542 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2543 bp_site->GetID(), 2544 (uint64_t)bp_addr, 2545 error.AsCString()); 2546 return error; 2547 } 2548 2549 // Uncomment to verify memory caching works after making changes to caching code 2550 //#define VERIFY_MEMORY_READS 2551 2552 size_t 2553 Process::ReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2554 { 2555 error.Clear(); 2556 if (!GetDisableMemoryCache()) 2557 { 2558 #if defined (VERIFY_MEMORY_READS) 2559 // Memory caching is enabled, with debug verification 2560 2561 if (buf && size) 2562 { 2563 // Uncomment the line below to make sure memory caching is working. 2564 // I ran this through the test suite and got no assertions, so I am 2565 // pretty confident this is working well. If any changes are made to 2566 // memory caching, uncomment the line below and test your changes! 2567 2568 // Verify all memory reads by using the cache first, then redundantly 2569 // reading the same memory from the inferior and comparing to make sure 2570 // everything is exactly the same. 2571 std::string verify_buf (size, '\0'); 2572 assert (verify_buf.size() == size); 2573 const size_t cache_bytes_read = m_memory_cache.Read (this, addr, buf, size, error); 2574 Error verify_error; 2575 const size_t verify_bytes_read = ReadMemoryFromInferior (addr, const_cast<char *>(verify_buf.data()), verify_buf.size(), verify_error); 2576 assert (cache_bytes_read == verify_bytes_read); 2577 assert (memcmp(buf, verify_buf.data(), verify_buf.size()) == 0); 2578 assert (verify_error.Success() == error.Success()); 2579 return cache_bytes_read; 2580 } 2581 return 0; 2582 #else // !defined(VERIFY_MEMORY_READS) 2583 // Memory caching is enabled, without debug verification 2584 2585 return m_memory_cache.Read (addr, buf, size, error); 2586 #endif // defined (VERIFY_MEMORY_READS) 2587 } 2588 else 2589 { 2590 // Memory caching is disabled 2591 2592 return ReadMemoryFromInferior (addr, buf, size, error); 2593 } 2594 } 2595 2596 size_t 2597 Process::ReadCStringFromMemory (addr_t addr, std::string &out_str, Error &error) 2598 { 2599 char buf[256]; 2600 out_str.clear(); 2601 addr_t curr_addr = addr; 2602 while (1) 2603 { 2604 size_t length = ReadCStringFromMemory (curr_addr, buf, sizeof(buf), error); 2605 if (length == 0) 2606 break; 2607 out_str.append(buf, length); 2608 // If we got "length - 1" bytes, we didn't get the whole C string, we 2609 // need to read some more characters 2610 if (length == sizeof(buf) - 1) 2611 curr_addr += length; 2612 else 2613 break; 2614 } 2615 return out_str.size(); 2616 } 2617 2618 size_t 2619 Process::ReadStringFromMemory (addr_t addr, char *dst, size_t max_bytes, Error &error, 2620 size_t type_width) 2621 { 2622 size_t total_bytes_read = 0; 2623 if (dst && max_bytes && type_width && max_bytes >= type_width) 2624 { 2625 // Ensure a null terminator independent of the number of bytes that is read. 2626 memset (dst, 0, max_bytes); 2627 size_t bytes_left = max_bytes - type_width; 2628 2629 const char terminator[4] = {'\0', '\0', '\0', '\0'}; 2630 assert(sizeof(terminator) >= type_width && 2631 "Attempting to validate a string with more than 4 bytes per character!"); 2632 2633 addr_t curr_addr = addr; 2634 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2635 char *curr_dst = dst; 2636 2637 error.Clear(); 2638 while (bytes_left > 0 && error.Success()) 2639 { 2640 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2641 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2642 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2643 2644 if (bytes_read == 0) 2645 break; 2646 2647 // Search for a null terminator of correct size and alignment in bytes_read 2648 size_t aligned_start = total_bytes_read - total_bytes_read % type_width; 2649 for (size_t i = aligned_start; i + type_width <= total_bytes_read + bytes_read; i += type_width) 2650 if (::strncmp(&dst[i], terminator, type_width) == 0) 2651 { 2652 error.Clear(); 2653 return i; 2654 } 2655 2656 total_bytes_read += bytes_read; 2657 curr_dst += bytes_read; 2658 curr_addr += bytes_read; 2659 bytes_left -= bytes_read; 2660 } 2661 } 2662 else 2663 { 2664 if (max_bytes) 2665 error.SetErrorString("invalid arguments"); 2666 } 2667 return total_bytes_read; 2668 } 2669 2670 // Deprecated in favor of ReadStringFromMemory which has wchar support and correct code to find 2671 // null terminators. 2672 size_t 2673 Process::ReadCStringFromMemory (addr_t addr, char *dst, size_t dst_max_len, Error &result_error) 2674 { 2675 size_t total_cstr_len = 0; 2676 if (dst && dst_max_len) 2677 { 2678 result_error.Clear(); 2679 // NULL out everything just to be safe 2680 memset (dst, 0, dst_max_len); 2681 Error error; 2682 addr_t curr_addr = addr; 2683 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2684 size_t bytes_left = dst_max_len - 1; 2685 char *curr_dst = dst; 2686 2687 while (bytes_left > 0) 2688 { 2689 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2690 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2691 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2692 2693 if (bytes_read == 0) 2694 { 2695 result_error = error; 2696 dst[total_cstr_len] = '\0'; 2697 break; 2698 } 2699 const size_t len = strlen(curr_dst); 2700 2701 total_cstr_len += len; 2702 2703 if (len < bytes_to_read) 2704 break; 2705 2706 curr_dst += bytes_read; 2707 curr_addr += bytes_read; 2708 bytes_left -= bytes_read; 2709 } 2710 } 2711 else 2712 { 2713 if (dst == NULL) 2714 result_error.SetErrorString("invalid arguments"); 2715 else 2716 result_error.Clear(); 2717 } 2718 return total_cstr_len; 2719 } 2720 2721 size_t 2722 Process::ReadMemoryFromInferior (addr_t addr, void *buf, size_t size, Error &error) 2723 { 2724 if (buf == NULL || size == 0) 2725 return 0; 2726 2727 size_t bytes_read = 0; 2728 uint8_t *bytes = (uint8_t *)buf; 2729 2730 while (bytes_read < size) 2731 { 2732 const size_t curr_size = size - bytes_read; 2733 const size_t curr_bytes_read = DoReadMemory (addr + bytes_read, 2734 bytes + bytes_read, 2735 curr_size, 2736 error); 2737 bytes_read += curr_bytes_read; 2738 if (curr_bytes_read == curr_size || curr_bytes_read == 0) 2739 break; 2740 } 2741 2742 // Replace any software breakpoint opcodes that fall into this range back 2743 // into "buf" before we return 2744 if (bytes_read > 0) 2745 RemoveBreakpointOpcodesFromBuffer (addr, bytes_read, (uint8_t *)buf); 2746 return bytes_read; 2747 } 2748 2749 uint64_t 2750 Process::ReadUnsignedIntegerFromMemory (lldb::addr_t vm_addr, size_t integer_byte_size, uint64_t fail_value, Error &error) 2751 { 2752 Scalar scalar; 2753 if (ReadScalarIntegerFromMemory(vm_addr, integer_byte_size, false, scalar, error)) 2754 return scalar.ULongLong(fail_value); 2755 return fail_value; 2756 } 2757 2758 addr_t 2759 Process::ReadPointerFromMemory (lldb::addr_t vm_addr, Error &error) 2760 { 2761 Scalar scalar; 2762 if (ReadScalarIntegerFromMemory(vm_addr, GetAddressByteSize(), false, scalar, error)) 2763 return scalar.ULongLong(LLDB_INVALID_ADDRESS); 2764 return LLDB_INVALID_ADDRESS; 2765 } 2766 2767 bool 2768 Process::WritePointerToMemory (lldb::addr_t vm_addr, 2769 lldb::addr_t ptr_value, 2770 Error &error) 2771 { 2772 Scalar scalar; 2773 const uint32_t addr_byte_size = GetAddressByteSize(); 2774 if (addr_byte_size <= 4) 2775 scalar = (uint32_t)ptr_value; 2776 else 2777 scalar = ptr_value; 2778 return WriteScalarToMemory(vm_addr, scalar, addr_byte_size, error) == addr_byte_size; 2779 } 2780 2781 size_t 2782 Process::WriteMemoryPrivate (addr_t addr, const void *buf, size_t size, Error &error) 2783 { 2784 size_t bytes_written = 0; 2785 const uint8_t *bytes = (const uint8_t *)buf; 2786 2787 while (bytes_written < size) 2788 { 2789 const size_t curr_size = size - bytes_written; 2790 const size_t curr_bytes_written = DoWriteMemory (addr + bytes_written, 2791 bytes + bytes_written, 2792 curr_size, 2793 error); 2794 bytes_written += curr_bytes_written; 2795 if (curr_bytes_written == curr_size || curr_bytes_written == 0) 2796 break; 2797 } 2798 return bytes_written; 2799 } 2800 2801 size_t 2802 Process::WriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2803 { 2804 #if defined (ENABLE_MEMORY_CACHING) 2805 m_memory_cache.Flush (addr, size); 2806 #endif 2807 2808 if (buf == NULL || size == 0) 2809 return 0; 2810 2811 m_mod_id.BumpMemoryID(); 2812 2813 // We need to write any data that would go where any current software traps 2814 // (enabled software breakpoints) any software traps (breakpoints) that we 2815 // may have placed in our tasks memory. 2816 2817 BreakpointSiteList bp_sites_in_range; 2818 2819 if (m_breakpoint_site_list.FindInRange (addr, addr + size, bp_sites_in_range)) 2820 { 2821 // No breakpoint sites overlap 2822 if (bp_sites_in_range.IsEmpty()) 2823 return WriteMemoryPrivate (addr, buf, size, error); 2824 else 2825 { 2826 const uint8_t *ubuf = (const uint8_t *)buf; 2827 uint64_t bytes_written = 0; 2828 2829 bp_sites_in_range.ForEach([this, addr, size, &bytes_written, &ubuf, &error](BreakpointSite *bp) -> void { 2830 2831 if (error.Success()) 2832 { 2833 addr_t intersect_addr; 2834 size_t intersect_size; 2835 size_t opcode_offset; 2836 const bool intersects = bp->IntersectsRange(addr, size, &intersect_addr, &intersect_size, &opcode_offset); 2837 UNUSED_IF_ASSERT_DISABLED(intersects); 2838 assert(intersects); 2839 assert(addr <= intersect_addr && intersect_addr < addr + size); 2840 assert(addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= addr + size); 2841 assert(opcode_offset + intersect_size <= bp->GetByteSize()); 2842 2843 // Check for bytes before this breakpoint 2844 const addr_t curr_addr = addr + bytes_written; 2845 if (intersect_addr > curr_addr) 2846 { 2847 // There are some bytes before this breakpoint that we need to 2848 // just write to memory 2849 size_t curr_size = intersect_addr - curr_addr; 2850 size_t curr_bytes_written = WriteMemoryPrivate (curr_addr, 2851 ubuf + bytes_written, 2852 curr_size, 2853 error); 2854 bytes_written += curr_bytes_written; 2855 if (curr_bytes_written != curr_size) 2856 { 2857 // We weren't able to write all of the requested bytes, we 2858 // are done looping and will return the number of bytes that 2859 // we have written so far. 2860 if (error.Success()) 2861 error.SetErrorToGenericError(); 2862 } 2863 } 2864 // Now write any bytes that would cover up any software breakpoints 2865 // directly into the breakpoint opcode buffer 2866 ::memcpy(bp->GetSavedOpcodeBytes() + opcode_offset, ubuf + bytes_written, intersect_size); 2867 bytes_written += intersect_size; 2868 } 2869 }); 2870 2871 if (bytes_written < size) 2872 WriteMemoryPrivate (addr + bytes_written, 2873 ubuf + bytes_written, 2874 size - bytes_written, 2875 error); 2876 } 2877 } 2878 else 2879 { 2880 return WriteMemoryPrivate (addr, buf, size, error); 2881 } 2882 2883 // Write any remaining bytes after the last breakpoint if we have any left 2884 return 0; //bytes_written; 2885 } 2886 2887 size_t 2888 Process::WriteScalarToMemory (addr_t addr, const Scalar &scalar, size_t byte_size, Error &error) 2889 { 2890 if (byte_size == UINT32_MAX) 2891 byte_size = scalar.GetByteSize(); 2892 if (byte_size > 0) 2893 { 2894 uint8_t buf[32]; 2895 const size_t mem_size = scalar.GetAsMemoryData (buf, byte_size, GetByteOrder(), error); 2896 if (mem_size > 0) 2897 return WriteMemory(addr, buf, mem_size, error); 2898 else 2899 error.SetErrorString ("failed to get scalar as memory data"); 2900 } 2901 else 2902 { 2903 error.SetErrorString ("invalid scalar value"); 2904 } 2905 return 0; 2906 } 2907 2908 size_t 2909 Process::ReadScalarIntegerFromMemory (addr_t addr, 2910 uint32_t byte_size, 2911 bool is_signed, 2912 Scalar &scalar, 2913 Error &error) 2914 { 2915 uint64_t uval = 0; 2916 if (byte_size == 0) 2917 { 2918 error.SetErrorString ("byte size is zero"); 2919 } 2920 else if (byte_size & (byte_size - 1)) 2921 { 2922 error.SetErrorStringWithFormat ("byte size %u is not a power of 2", byte_size); 2923 } 2924 else if (byte_size <= sizeof(uval)) 2925 { 2926 const size_t bytes_read = ReadMemory (addr, &uval, byte_size, error); 2927 if (bytes_read == byte_size) 2928 { 2929 DataExtractor data (&uval, sizeof(uval), GetByteOrder(), GetAddressByteSize()); 2930 lldb::offset_t offset = 0; 2931 if (byte_size <= 4) 2932 scalar = data.GetMaxU32 (&offset, byte_size); 2933 else 2934 scalar = data.GetMaxU64 (&offset, byte_size); 2935 if (is_signed) 2936 scalar.SignExtend(byte_size * 8); 2937 return bytes_read; 2938 } 2939 } 2940 else 2941 { 2942 error.SetErrorStringWithFormat ("byte size of %u is too large for integer scalar type", byte_size); 2943 } 2944 return 0; 2945 } 2946 2947 #define USE_ALLOCATE_MEMORY_CACHE 1 2948 addr_t 2949 Process::AllocateMemory(size_t size, uint32_t permissions, Error &error) 2950 { 2951 if (GetPrivateState() != eStateStopped) 2952 return LLDB_INVALID_ADDRESS; 2953 2954 #if defined (USE_ALLOCATE_MEMORY_CACHE) 2955 return m_allocated_memory_cache.AllocateMemory(size, permissions, error); 2956 #else 2957 addr_t allocated_addr = DoAllocateMemory (size, permissions, error); 2958 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2959 if (log) 2960 log->Printf("Process::AllocateMemory(size=%" PRIu64 ", permissions=%s) => 0x%16.16" PRIx64 " (m_stop_id = %u m_memory_id = %u)", 2961 (uint64_t)size, 2962 GetPermissionsAsCString (permissions), 2963 (uint64_t)allocated_addr, 2964 m_mod_id.GetStopID(), 2965 m_mod_id.GetMemoryID()); 2966 return allocated_addr; 2967 #endif 2968 } 2969 2970 addr_t 2971 Process::CallocateMemory(size_t size, uint32_t permissions, Error &error) 2972 { 2973 addr_t return_addr = AllocateMemory(size, permissions, error); 2974 if (error.Success()) 2975 { 2976 std::string buffer(size, 0); 2977 WriteMemory(return_addr, buffer.c_str(), size, error); 2978 } 2979 return return_addr; 2980 } 2981 2982 bool 2983 Process::CanJIT () 2984 { 2985 if (m_can_jit == eCanJITDontKnow) 2986 { 2987 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2988 Error err; 2989 2990 uint64_t allocated_memory = AllocateMemory(8, 2991 ePermissionsReadable | ePermissionsWritable | ePermissionsExecutable, 2992 err); 2993 2994 if (err.Success()) 2995 { 2996 m_can_jit = eCanJITYes; 2997 if (log) 2998 log->Printf ("Process::%s pid %" PRIu64 " allocation test passed, CanJIT () is true", __FUNCTION__, GetID ()); 2999 } 3000 else 3001 { 3002 m_can_jit = eCanJITNo; 3003 if (log) 3004 log->Printf ("Process::%s pid %" PRIu64 " allocation test failed, CanJIT () is false: %s", __FUNCTION__, GetID (), err.AsCString ()); 3005 } 3006 3007 DeallocateMemory (allocated_memory); 3008 } 3009 3010 return m_can_jit == eCanJITYes; 3011 } 3012 3013 void 3014 Process::SetCanJIT (bool can_jit) 3015 { 3016 m_can_jit = (can_jit ? eCanJITYes : eCanJITNo); 3017 } 3018 3019 void 3020 Process::SetCanRunCode (bool can_run_code) 3021 { 3022 SetCanJIT(can_run_code); 3023 m_can_interpret_function_calls = can_run_code; 3024 } 3025 3026 Error 3027 Process::DeallocateMemory (addr_t ptr) 3028 { 3029 Error error; 3030 #if defined (USE_ALLOCATE_MEMORY_CACHE) 3031 if (!m_allocated_memory_cache.DeallocateMemory(ptr)) 3032 { 3033 error.SetErrorStringWithFormat ("deallocation of memory at 0x%" PRIx64 " failed.", (uint64_t)ptr); 3034 } 3035 #else 3036 error = DoDeallocateMemory (ptr); 3037 3038 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3039 if (log) 3040 log->Printf("Process::DeallocateMemory(addr=0x%16.16" PRIx64 ") => err = %s (m_stop_id = %u, m_memory_id = %u)", 3041 ptr, 3042 error.AsCString("SUCCESS"), 3043 m_mod_id.GetStopID(), 3044 m_mod_id.GetMemoryID()); 3045 #endif 3046 return error; 3047 } 3048 3049 ModuleSP 3050 Process::ReadModuleFromMemory (const FileSpec& file_spec, 3051 lldb::addr_t header_addr, 3052 size_t size_to_read) 3053 { 3054 Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST); 3055 if (log) 3056 { 3057 log->Printf ("Process::ReadModuleFromMemory reading %s binary from memory", file_spec.GetPath().c_str()); 3058 } 3059 ModuleSP module_sp (new Module (file_spec, ArchSpec())); 3060 if (module_sp) 3061 { 3062 Error error; 3063 ObjectFile *objfile = module_sp->GetMemoryObjectFile (shared_from_this(), header_addr, error, size_to_read); 3064 if (objfile) 3065 return module_sp; 3066 } 3067 return ModuleSP(); 3068 } 3069 3070 bool 3071 Process::GetLoadAddressPermissions (lldb::addr_t load_addr, uint32_t &permissions) 3072 { 3073 MemoryRegionInfo range_info; 3074 permissions = 0; 3075 Error error (GetMemoryRegionInfo (load_addr, range_info)); 3076 if (!error.Success()) 3077 return false; 3078 if (range_info.GetReadable() == MemoryRegionInfo::eDontKnow 3079 || range_info.GetWritable() == MemoryRegionInfo::eDontKnow 3080 || range_info.GetExecutable() == MemoryRegionInfo::eDontKnow) 3081 { 3082 return false; 3083 } 3084 3085 if (range_info.GetReadable() == MemoryRegionInfo::eYes) 3086 permissions |= lldb::ePermissionsReadable; 3087 3088 if (range_info.GetWritable() == MemoryRegionInfo::eYes) 3089 permissions |= lldb::ePermissionsWritable; 3090 3091 if (range_info.GetExecutable() == MemoryRegionInfo::eYes) 3092 permissions |= lldb::ePermissionsExecutable; 3093 3094 return true; 3095 } 3096 3097 Error 3098 Process::EnableWatchpoint (Watchpoint *watchpoint, bool notify) 3099 { 3100 Error error; 3101 error.SetErrorString("watchpoints are not supported"); 3102 return error; 3103 } 3104 3105 Error 3106 Process::DisableWatchpoint (Watchpoint *watchpoint, bool notify) 3107 { 3108 Error error; 3109 error.SetErrorString("watchpoints are not supported"); 3110 return error; 3111 } 3112 3113 StateType 3114 Process::WaitForProcessStopPrivate (const TimeValue *timeout, EventSP &event_sp) 3115 { 3116 StateType state; 3117 // Now wait for the process to launch and return control to us, and then 3118 // call DidLaunch: 3119 while (1) 3120 { 3121 event_sp.reset(); 3122 state = WaitForStateChangedEventsPrivate (timeout, event_sp); 3123 3124 if (StateIsStoppedState(state, false)) 3125 break; 3126 3127 // If state is invalid, then we timed out 3128 if (state == eStateInvalid) 3129 break; 3130 3131 if (event_sp) 3132 HandlePrivateEvent (event_sp); 3133 } 3134 return state; 3135 } 3136 3137 void 3138 Process::LoadOperatingSystemPlugin(bool flush) 3139 { 3140 if (flush) 3141 m_thread_list.Clear(); 3142 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3143 if (flush) 3144 Flush(); 3145 } 3146 3147 Error 3148 Process::Launch (ProcessLaunchInfo &launch_info) 3149 { 3150 Error error; 3151 m_abi_sp.reset(); 3152 m_dyld_ap.reset(); 3153 m_jit_loaders_ap.reset(); 3154 m_system_runtime_ap.reset(); 3155 m_os_ap.reset(); 3156 m_process_input_reader.reset(); 3157 m_stop_info_override_callback = NULL; 3158 3159 Module *exe_module = GetTarget().GetExecutableModulePointer(); 3160 if (exe_module) 3161 { 3162 char local_exec_file_path[PATH_MAX]; 3163 char platform_exec_file_path[PATH_MAX]; 3164 exe_module->GetFileSpec().GetPath(local_exec_file_path, sizeof(local_exec_file_path)); 3165 exe_module->GetPlatformFileSpec().GetPath(platform_exec_file_path, sizeof(platform_exec_file_path)); 3166 if (exe_module->GetFileSpec().Exists()) 3167 { 3168 // Install anything that might need to be installed prior to launching. 3169 // For host systems, this will do nothing, but if we are connected to a 3170 // remote platform it will install any needed binaries 3171 error = GetTarget().Install(&launch_info); 3172 if (error.Fail()) 3173 return error; 3174 3175 if (PrivateStateThreadIsValid ()) 3176 PausePrivateStateThread (); 3177 3178 error = WillLaunch (exe_module); 3179 if (error.Success()) 3180 { 3181 const bool restarted = false; 3182 SetPublicState (eStateLaunching, restarted); 3183 m_should_detach = false; 3184 3185 if (m_public_run_lock.TrySetRunning()) 3186 { 3187 // Now launch using these arguments. 3188 error = DoLaunch (exe_module, launch_info); 3189 } 3190 else 3191 { 3192 // This shouldn't happen 3193 error.SetErrorString("failed to acquire process run lock"); 3194 } 3195 3196 if (error.Fail()) 3197 { 3198 if (GetID() != LLDB_INVALID_PROCESS_ID) 3199 { 3200 SetID (LLDB_INVALID_PROCESS_ID); 3201 const char *error_string = error.AsCString(); 3202 if (error_string == NULL) 3203 error_string = "launch failed"; 3204 SetExitStatus (-1, error_string); 3205 } 3206 } 3207 else 3208 { 3209 EventSP event_sp; 3210 TimeValue timeout_time; 3211 timeout_time = TimeValue::Now(); 3212 timeout_time.OffsetWithSeconds(10); 3213 StateType state = WaitForProcessStopPrivate(&timeout_time, event_sp); 3214 3215 if (state == eStateInvalid || event_sp.get() == NULL) 3216 { 3217 // We were able to launch the process, but we failed to 3218 // catch the initial stop. 3219 error.SetErrorString ("failed to catch stop after launch"); 3220 SetExitStatus (0, "failed to catch stop after launch"); 3221 Destroy(false); 3222 } 3223 else if (state == eStateStopped || state == eStateCrashed) 3224 { 3225 DidLaunch (); 3226 3227 DynamicLoader *dyld = GetDynamicLoader (); 3228 if (dyld) 3229 dyld->DidLaunch(); 3230 3231 GetJITLoaders().DidLaunch(); 3232 3233 SystemRuntime *system_runtime = GetSystemRuntime (); 3234 if (system_runtime) 3235 system_runtime->DidLaunch(); 3236 3237 LoadOperatingSystemPlugin(false); 3238 3239 // Note, the stop event was consumed above, but not handled. This was done 3240 // to give DidLaunch a chance to run. The target is either stopped or crashed. 3241 // Directly set the state. This is done to prevent a stop message with a bunch 3242 // of spurious output on thread status, as well as not pop a ProcessIOHandler. 3243 SetPublicState(state, false); 3244 3245 if (PrivateStateThreadIsValid ()) 3246 ResumePrivateStateThread (); 3247 else 3248 StartPrivateStateThread (); 3249 3250 m_stop_info_override_callback = GetTarget().GetArchitecture().GetStopInfoOverrideCallback(); 3251 3252 // Target was stopped at entry as was intended. Need to notify the listeners 3253 // about it. 3254 if (state == eStateStopped && launch_info.GetFlags().Test(eLaunchFlagStopAtEntry)) 3255 HandlePrivateEvent(event_sp); 3256 } 3257 else if (state == eStateExited) 3258 { 3259 // We exited while trying to launch somehow. Don't call DidLaunch as that's 3260 // not likely to work, and return an invalid pid. 3261 HandlePrivateEvent (event_sp); 3262 } 3263 } 3264 } 3265 } 3266 else 3267 { 3268 error.SetErrorStringWithFormat("file doesn't exist: '%s'", local_exec_file_path); 3269 } 3270 } 3271 return error; 3272 } 3273 3274 Error 3275 Process::LoadCore () 3276 { 3277 Error error = DoLoadCore(); 3278 if (error.Success()) 3279 { 3280 Listener listener ("lldb.process.load_core_listener"); 3281 HijackProcessEvents(&listener); 3282 3283 if (PrivateStateThreadIsValid ()) 3284 ResumePrivateStateThread (); 3285 else 3286 StartPrivateStateThread (); 3287 3288 DynamicLoader *dyld = GetDynamicLoader (); 3289 if (dyld) 3290 dyld->DidAttach(); 3291 3292 GetJITLoaders().DidAttach(); 3293 3294 SystemRuntime *system_runtime = GetSystemRuntime (); 3295 if (system_runtime) 3296 system_runtime->DidAttach(); 3297 3298 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3299 // We successfully loaded a core file, now pretend we stopped so we can 3300 // show all of the threads in the core file and explore the crashed 3301 // state. 3302 SetPrivateState (eStateStopped); 3303 3304 // Wait indefinitely for a stopped event since we just posted one above... 3305 lldb::EventSP event_sp; 3306 listener.WaitForEvent (NULL, event_sp); 3307 StateType state = ProcessEventData::GetStateFromEvent(event_sp.get()); 3308 3309 if (!StateIsStoppedState (state, false)) 3310 { 3311 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3312 if (log) 3313 log->Printf("Process::Halt() failed to stop, state is: %s", StateAsCString(state)); 3314 error.SetErrorString ("Did not get stopped event after loading the core file."); 3315 } 3316 RestoreProcessEvents (); 3317 } 3318 return error; 3319 } 3320 3321 DynamicLoader * 3322 Process::GetDynamicLoader () 3323 { 3324 if (m_dyld_ap.get() == NULL) 3325 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 3326 return m_dyld_ap.get(); 3327 } 3328 3329 const lldb::DataBufferSP 3330 Process::GetAuxvData() 3331 { 3332 return DataBufferSP (); 3333 } 3334 3335 JITLoaderList & 3336 Process::GetJITLoaders () 3337 { 3338 if (!m_jit_loaders_ap) 3339 { 3340 m_jit_loaders_ap.reset(new JITLoaderList()); 3341 JITLoader::LoadPlugins(this, *m_jit_loaders_ap); 3342 } 3343 return *m_jit_loaders_ap; 3344 } 3345 3346 SystemRuntime * 3347 Process::GetSystemRuntime () 3348 { 3349 if (m_system_runtime_ap.get() == NULL) 3350 m_system_runtime_ap.reset (SystemRuntime::FindPlugin(this)); 3351 return m_system_runtime_ap.get(); 3352 } 3353 3354 Process::AttachCompletionHandler::AttachCompletionHandler (Process *process, uint32_t exec_count) : 3355 NextEventAction (process), 3356 m_exec_count (exec_count) 3357 { 3358 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3359 if (log) 3360 log->Printf ("Process::AttachCompletionHandler::%s process=%p, exec_count=%" PRIu32, __FUNCTION__, static_cast<void*>(process), exec_count); 3361 } 3362 3363 Process::NextEventAction::EventActionResult 3364 Process::AttachCompletionHandler::PerformAction (lldb::EventSP &event_sp) 3365 { 3366 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3367 3368 StateType state = ProcessEventData::GetStateFromEvent (event_sp.get()); 3369 if (log) 3370 log->Printf ("Process::AttachCompletionHandler::%s called with state %s (%d)", __FUNCTION__, StateAsCString(state), static_cast<int> (state)); 3371 3372 switch (state) 3373 { 3374 case eStateAttaching: 3375 return eEventActionSuccess; 3376 3377 case eStateRunning: 3378 case eStateConnected: 3379 return eEventActionRetry; 3380 3381 case eStateStopped: 3382 case eStateCrashed: 3383 { 3384 // During attach, prior to sending the eStateStopped event, 3385 // lldb_private::Process subclasses must set the new process ID. 3386 assert (m_process->GetID() != LLDB_INVALID_PROCESS_ID); 3387 // We don't want these events to be reported, so go set the ShouldReportStop here: 3388 m_process->GetThreadList().SetShouldReportStop (eVoteNo); 3389 3390 if (m_exec_count > 0) 3391 { 3392 --m_exec_count; 3393 3394 if (log) 3395 log->Printf ("Process::AttachCompletionHandler::%s state %s: reduced remaining exec count to %" PRIu32 ", requesting resume", __FUNCTION__, StateAsCString(state), m_exec_count); 3396 3397 RequestResume(); 3398 return eEventActionRetry; 3399 } 3400 else 3401 { 3402 if (log) 3403 log->Printf ("Process::AttachCompletionHandler::%s state %s: no more execs expected to start, continuing with attach", __FUNCTION__, StateAsCString(state)); 3404 3405 m_process->CompleteAttach (); 3406 return eEventActionSuccess; 3407 } 3408 } 3409 break; 3410 3411 default: 3412 case eStateExited: 3413 case eStateInvalid: 3414 break; 3415 } 3416 3417 m_exit_string.assign ("No valid Process"); 3418 return eEventActionExit; 3419 } 3420 3421 Process::NextEventAction::EventActionResult 3422 Process::AttachCompletionHandler::HandleBeingInterrupted() 3423 { 3424 return eEventActionSuccess; 3425 } 3426 3427 const char * 3428 Process::AttachCompletionHandler::GetExitString () 3429 { 3430 return m_exit_string.c_str(); 3431 } 3432 3433 Listener & 3434 ProcessAttachInfo::GetListenerForProcess (Debugger &debugger) 3435 { 3436 if (m_listener_sp) 3437 return *m_listener_sp; 3438 else 3439 return debugger.GetListener(); 3440 } 3441 3442 Error 3443 Process::Attach (ProcessAttachInfo &attach_info) 3444 { 3445 m_abi_sp.reset(); 3446 m_process_input_reader.reset(); 3447 m_dyld_ap.reset(); 3448 m_jit_loaders_ap.reset(); 3449 m_system_runtime_ap.reset(); 3450 m_os_ap.reset(); 3451 m_stop_info_override_callback = NULL; 3452 3453 lldb::pid_t attach_pid = attach_info.GetProcessID(); 3454 Error error; 3455 if (attach_pid == LLDB_INVALID_PROCESS_ID) 3456 { 3457 char process_name[PATH_MAX]; 3458 3459 if (attach_info.GetExecutableFile().GetPath (process_name, sizeof(process_name))) 3460 { 3461 const bool wait_for_launch = attach_info.GetWaitForLaunch(); 3462 3463 if (wait_for_launch) 3464 { 3465 error = WillAttachToProcessWithName(process_name, wait_for_launch); 3466 if (error.Success()) 3467 { 3468 if (m_public_run_lock.TrySetRunning()) 3469 { 3470 m_should_detach = true; 3471 const bool restarted = false; 3472 SetPublicState (eStateAttaching, restarted); 3473 // Now attach using these arguments. 3474 error = DoAttachToProcessWithName (process_name, attach_info); 3475 } 3476 else 3477 { 3478 // This shouldn't happen 3479 error.SetErrorString("failed to acquire process run lock"); 3480 } 3481 3482 if (error.Fail()) 3483 { 3484 if (GetID() != LLDB_INVALID_PROCESS_ID) 3485 { 3486 SetID (LLDB_INVALID_PROCESS_ID); 3487 if (error.AsCString() == NULL) 3488 error.SetErrorString("attach failed"); 3489 3490 SetExitStatus(-1, error.AsCString()); 3491 } 3492 } 3493 else 3494 { 3495 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3496 StartPrivateStateThread(); 3497 } 3498 return error; 3499 } 3500 } 3501 else 3502 { 3503 ProcessInstanceInfoList process_infos; 3504 PlatformSP platform_sp (GetTarget().GetPlatform ()); 3505 3506 if (platform_sp) 3507 { 3508 ProcessInstanceInfoMatch match_info; 3509 match_info.GetProcessInfo() = attach_info; 3510 match_info.SetNameMatchType (eNameMatchEquals); 3511 platform_sp->FindProcesses (match_info, process_infos); 3512 const uint32_t num_matches = process_infos.GetSize(); 3513 if (num_matches == 1) 3514 { 3515 attach_pid = process_infos.GetProcessIDAtIndex(0); 3516 // Fall through and attach using the above process ID 3517 } 3518 else 3519 { 3520 match_info.GetProcessInfo().GetExecutableFile().GetPath (process_name, sizeof(process_name)); 3521 if (num_matches > 1) 3522 { 3523 StreamString s; 3524 ProcessInstanceInfo::DumpTableHeader (s, platform_sp.get(), true, false); 3525 for (size_t i = 0; i < num_matches; i++) 3526 { 3527 process_infos.GetProcessInfoAtIndex(i).DumpAsTableRow(s, platform_sp.get(), true, false); 3528 } 3529 error.SetErrorStringWithFormat ("more than one process named %s:\n%s", 3530 process_name, 3531 s.GetData()); 3532 } 3533 else 3534 error.SetErrorStringWithFormat ("could not find a process named %s", process_name); 3535 } 3536 } 3537 else 3538 { 3539 error.SetErrorString ("invalid platform, can't find processes by name"); 3540 return error; 3541 } 3542 } 3543 } 3544 else 3545 { 3546 error.SetErrorString ("invalid process name"); 3547 } 3548 } 3549 3550 if (attach_pid != LLDB_INVALID_PROCESS_ID) 3551 { 3552 error = WillAttachToProcessWithID(attach_pid); 3553 if (error.Success()) 3554 { 3555 3556 if (m_public_run_lock.TrySetRunning()) 3557 { 3558 // Now attach using these arguments. 3559 m_should_detach = true; 3560 const bool restarted = false; 3561 SetPublicState (eStateAttaching, restarted); 3562 error = DoAttachToProcessWithID (attach_pid, attach_info); 3563 } 3564 else 3565 { 3566 // This shouldn't happen 3567 error.SetErrorString("failed to acquire process run lock"); 3568 } 3569 3570 if (error.Success()) 3571 { 3572 3573 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3574 StartPrivateStateThread(); 3575 } 3576 else 3577 { 3578 if (GetID() != LLDB_INVALID_PROCESS_ID) 3579 SetID (LLDB_INVALID_PROCESS_ID); 3580 3581 const char *error_string = error.AsCString(); 3582 if (error_string == NULL) 3583 error_string = "attach failed"; 3584 3585 SetExitStatus(-1, error_string); 3586 } 3587 } 3588 } 3589 return error; 3590 } 3591 3592 void 3593 Process::CompleteAttach () 3594 { 3595 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3596 if (log) 3597 log->Printf ("Process::%s()", __FUNCTION__); 3598 3599 // Let the process subclass figure out at much as it can about the process 3600 // before we go looking for a dynamic loader plug-in. 3601 ArchSpec process_arch; 3602 DidAttach(process_arch); 3603 3604 if (process_arch.IsValid()) 3605 { 3606 GetTarget().SetArchitecture(process_arch); 3607 if (log) 3608 { 3609 const char *triple_str = process_arch.GetTriple().getTriple().c_str (); 3610 log->Printf ("Process::%s replacing process architecture with DidAttach() architecture: %s", 3611 __FUNCTION__, 3612 triple_str ? triple_str : "<null>"); 3613 } 3614 } 3615 3616 // We just attached. If we have a platform, ask it for the process architecture, and if it isn't 3617 // the same as the one we've already set, switch architectures. 3618 PlatformSP platform_sp (GetTarget().GetPlatform ()); 3619 assert (platform_sp.get()); 3620 if (platform_sp) 3621 { 3622 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 3623 if (target_arch.IsValid() && !platform_sp->IsCompatibleArchitecture (target_arch, false, NULL)) 3624 { 3625 ArchSpec platform_arch; 3626 platform_sp = platform_sp->GetPlatformForArchitecture (target_arch, &platform_arch); 3627 if (platform_sp) 3628 { 3629 GetTarget().SetPlatform (platform_sp); 3630 GetTarget().SetArchitecture(platform_arch); 3631 if (log) 3632 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 ()); 3633 } 3634 } 3635 else if (!process_arch.IsValid()) 3636 { 3637 ProcessInstanceInfo process_info; 3638 platform_sp->GetProcessInfo (GetID(), process_info); 3639 const ArchSpec &process_arch = process_info.GetArchitecture(); 3640 if (process_arch.IsValid() && !GetTarget().GetArchitecture().IsExactMatch(process_arch)) 3641 { 3642 GetTarget().SetArchitecture (process_arch); 3643 if (log) 3644 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 ()); 3645 } 3646 } 3647 } 3648 3649 // We have completed the attach, now it is time to find the dynamic loader 3650 // plug-in 3651 DynamicLoader *dyld = GetDynamicLoader (); 3652 if (dyld) 3653 { 3654 dyld->DidAttach(); 3655 if (log) 3656 { 3657 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3658 log->Printf ("Process::%s after DynamicLoader::DidAttach(), target executable is %s (using %s plugin)", 3659 __FUNCTION__, 3660 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>", 3661 dyld->GetPluginName().AsCString ("<unnamed>")); 3662 } 3663 } 3664 3665 GetJITLoaders().DidAttach(); 3666 3667 SystemRuntime *system_runtime = GetSystemRuntime (); 3668 if (system_runtime) 3669 { 3670 system_runtime->DidAttach(); 3671 if (log) 3672 { 3673 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3674 log->Printf ("Process::%s after SystemRuntime::DidAttach(), target executable is %s (using %s plugin)", 3675 __FUNCTION__, 3676 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>", 3677 system_runtime->GetPluginName().AsCString("<unnamed>")); 3678 } 3679 } 3680 3681 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3682 // Figure out which one is the executable, and set that in our target: 3683 const ModuleList &target_modules = GetTarget().GetImages(); 3684 Mutex::Locker modules_locker(target_modules.GetMutex()); 3685 size_t num_modules = target_modules.GetSize(); 3686 ModuleSP new_executable_module_sp; 3687 3688 for (size_t i = 0; i < num_modules; i++) 3689 { 3690 ModuleSP module_sp (target_modules.GetModuleAtIndexUnlocked (i)); 3691 if (module_sp && module_sp->IsExecutable()) 3692 { 3693 if (GetTarget().GetExecutableModulePointer() != module_sp.get()) 3694 new_executable_module_sp = module_sp; 3695 break; 3696 } 3697 } 3698 if (new_executable_module_sp) 3699 { 3700 GetTarget().SetExecutableModule (new_executable_module_sp, false); 3701 if (log) 3702 { 3703 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3704 log->Printf ("Process::%s after looping through modules, target executable is %s", 3705 __FUNCTION__, 3706 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>"); 3707 } 3708 } 3709 3710 m_stop_info_override_callback = process_arch.GetStopInfoOverrideCallback(); 3711 } 3712 3713 Error 3714 Process::ConnectRemote (Stream *strm, const char *remote_url) 3715 { 3716 m_abi_sp.reset(); 3717 m_process_input_reader.reset(); 3718 3719 // Find the process and its architecture. Make sure it matches the architecture 3720 // of the current Target, and if not adjust it. 3721 3722 Error error (DoConnectRemote (strm, remote_url)); 3723 if (error.Success()) 3724 { 3725 if (GetID() != LLDB_INVALID_PROCESS_ID) 3726 { 3727 EventSP event_sp; 3728 StateType state = WaitForProcessStopPrivate(NULL, event_sp); 3729 3730 if (state == eStateStopped || state == eStateCrashed) 3731 { 3732 // If we attached and actually have a process on the other end, then 3733 // this ended up being the equivalent of an attach. 3734 CompleteAttach (); 3735 3736 // This delays passing the stopped event to listeners till 3737 // CompleteAttach gets a chance to complete... 3738 HandlePrivateEvent (event_sp); 3739 3740 } 3741 } 3742 3743 if (PrivateStateThreadIsValid ()) 3744 ResumePrivateStateThread (); 3745 else 3746 StartPrivateStateThread (); 3747 } 3748 return error; 3749 } 3750 3751 Error 3752 Process::PrivateResume () 3753 { 3754 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_STEP)); 3755 if (log) 3756 log->Printf("Process::PrivateResume() m_stop_id = %u, public state: %s private state: %s", 3757 m_mod_id.GetStopID(), 3758 StateAsCString(m_public_state.GetValue()), 3759 StateAsCString(m_private_state.GetValue())); 3760 3761 Error error (WillResume()); 3762 // Tell the process it is about to resume before the thread list 3763 if (error.Success()) 3764 { 3765 // Now let the thread list know we are about to resume so it 3766 // can let all of our threads know that they are about to be 3767 // resumed. Threads will each be called with 3768 // Thread::WillResume(StateType) where StateType contains the state 3769 // that they are supposed to have when the process is resumed 3770 // (suspended/running/stepping). Threads should also check 3771 // their resume signal in lldb::Thread::GetResumeSignal() 3772 // to see if they are supposed to start back up with a signal. 3773 if (m_thread_list.WillResume()) 3774 { 3775 // Last thing, do the PreResumeActions. 3776 if (!RunPreResumeActions()) 3777 { 3778 error.SetErrorStringWithFormat ("Process::PrivateResume PreResumeActions failed, not resuming."); 3779 } 3780 else 3781 { 3782 m_mod_id.BumpResumeID(); 3783 error = DoResume(); 3784 if (error.Success()) 3785 { 3786 DidResume(); 3787 m_thread_list.DidResume(); 3788 if (log) 3789 log->Printf ("Process thinks the process has resumed."); 3790 } 3791 } 3792 } 3793 else 3794 { 3795 // Somebody wanted to run without running (e.g. we were faking a step from one frame of a set of inlined 3796 // frames that share the same PC to another.) So generate a continue & a stopped event, 3797 // and let the world handle them. 3798 if (log) 3799 log->Printf ("Process::PrivateResume() asked to simulate a start & stop."); 3800 3801 SetPrivateState(eStateRunning); 3802 SetPrivateState(eStateStopped); 3803 } 3804 } 3805 else if (log) 3806 log->Printf ("Process::PrivateResume() got an error \"%s\".", error.AsCString("<unknown error>")); 3807 return error; 3808 } 3809 3810 Error 3811 Process::Halt (bool clear_thread_plans) 3812 { 3813 // Don't clear the m_clear_thread_plans_on_stop, only set it to true if 3814 // in case it was already set and some thread plan logic calls halt on its 3815 // own. 3816 m_clear_thread_plans_on_stop |= clear_thread_plans; 3817 3818 // First make sure we aren't in the middle of handling an event, or we might restart. This is pretty weak, since 3819 // we could just straightaway get another event. It just narrows the window... 3820 m_currently_handling_event.WaitForValueEqualTo(false); 3821 3822 3823 // Pause our private state thread so we can ensure no one else eats 3824 // the stop event out from under us. 3825 Listener halt_listener ("lldb.process.halt_listener"); 3826 HijackPrivateProcessEvents(&halt_listener); 3827 3828 EventSP event_sp; 3829 Error error (WillHalt()); 3830 3831 bool restored_process_events = false; 3832 if (error.Success()) 3833 { 3834 3835 bool caused_stop = false; 3836 3837 // Ask the process subclass to actually halt our process 3838 error = DoHalt(caused_stop); 3839 if (error.Success()) 3840 { 3841 if (m_public_state.GetValue() == eStateAttaching) 3842 { 3843 // Don't hijack and eat the eStateExited as the code that was doing 3844 // the attach will be waiting for this event... 3845 RestorePrivateProcessEvents(); 3846 restored_process_events = true; 3847 SetExitStatus(SIGKILL, "Cancelled async attach."); 3848 Destroy (false); 3849 } 3850 else 3851 { 3852 // If "caused_stop" is true, then DoHalt stopped the process. If 3853 // "caused_stop" is false, the process was already stopped. 3854 // If the DoHalt caused the process to stop, then we want to catch 3855 // this event and set the interrupted bool to true before we pass 3856 // this along so clients know that the process was interrupted by 3857 // a halt command. 3858 if (caused_stop) 3859 { 3860 // Wait for 1 second for the process to stop. 3861 TimeValue timeout_time; 3862 timeout_time = TimeValue::Now(); 3863 timeout_time.OffsetWithSeconds(10); 3864 bool got_event = halt_listener.WaitForEvent (&timeout_time, event_sp); 3865 StateType state = ProcessEventData::GetStateFromEvent(event_sp.get()); 3866 3867 if (!got_event || state == eStateInvalid) 3868 { 3869 // We timeout out and didn't get a stop event... 3870 error.SetErrorStringWithFormat ("Halt timed out. State = %s", StateAsCString(GetState())); 3871 } 3872 else 3873 { 3874 if (StateIsStoppedState (state, false)) 3875 { 3876 // We caused the process to interrupt itself, so mark this 3877 // as such in the stop event so clients can tell an interrupted 3878 // process from a natural stop 3879 ProcessEventData::SetInterruptedInEvent (event_sp.get(), true); 3880 } 3881 else 3882 { 3883 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3884 if (log) 3885 log->Printf("Process::Halt() failed to stop, state is: %s", StateAsCString(state)); 3886 error.SetErrorString ("Did not get stopped event after halt."); 3887 } 3888 } 3889 } 3890 DidHalt(); 3891 } 3892 } 3893 } 3894 // Resume our private state thread before we post the event (if any) 3895 if (!restored_process_events) 3896 RestorePrivateProcessEvents(); 3897 3898 // Post any event we might have consumed. If all goes well, we will have 3899 // stopped the process, intercepted the event and set the interrupted 3900 // bool in the event. Post it to the private event queue and that will end up 3901 // correctly setting the state. 3902 if (event_sp) 3903 m_private_state_broadcaster.BroadcastEvent(event_sp); 3904 3905 return error; 3906 } 3907 3908 Error 3909 Process::StopForDestroyOrDetach(lldb::EventSP &exit_event_sp) 3910 { 3911 Error error; 3912 if (m_public_state.GetValue() == eStateRunning) 3913 { 3914 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3915 if (log) 3916 log->Printf("Process::%s() About to stop.", __FUNCTION__); 3917 3918 ListenerSP listener_sp (new Listener("lldb.Process.StopForDestroyOrDetach.hijack")); 3919 HijackProcessEvents(listener_sp.get()); 3920 3921 SendAsyncInterrupt(); 3922 3923 // Consume the interrupt event. 3924 TimeValue timeout (TimeValue::Now()); 3925 timeout.OffsetWithSeconds(10); 3926 3927 StateType state = WaitForProcessToStop (&timeout, &exit_event_sp, true, listener_sp.get()); 3928 3929 RestoreProcessEvents(); 3930 3931 // If the process exited while we were waiting for it to stop, put the exited event into 3932 // the shared pointer passed in and return. Our caller doesn't need to do anything else, since 3933 // they don't have a process anymore... 3934 3935 if (state == eStateExited || m_private_state.GetValue() == eStateExited) 3936 { 3937 if (log) 3938 log->Printf("Process::%s() Process exited while waiting to stop.", __FUNCTION__); 3939 return error; 3940 } 3941 else 3942 exit_event_sp.reset(); // It is ok to consume any non-exit stop events 3943 3944 if (state != eStateStopped) 3945 { 3946 if (log) 3947 log->Printf("Process::%s() failed to stop, state is: %s", __FUNCTION__, StateAsCString(state)); 3948 // If we really couldn't stop the process then we should just error out here, but if the 3949 // lower levels just bobbled sending the event and we really are stopped, then continue on. 3950 StateType private_state = m_private_state.GetValue(); 3951 if (private_state != eStateStopped) 3952 { 3953 return error; 3954 } 3955 } 3956 } 3957 return error; 3958 } 3959 3960 Error 3961 Process::Detach (bool keep_stopped) 3962 { 3963 EventSP exit_event_sp; 3964 Error error; 3965 m_destroy_in_process = true; 3966 3967 error = WillDetach(); 3968 3969 if (error.Success()) 3970 { 3971 if (DetachRequiresHalt()) 3972 { 3973 error = StopForDestroyOrDetach (exit_event_sp); 3974 if (!error.Success()) 3975 { 3976 m_destroy_in_process = false; 3977 return error; 3978 } 3979 else if (exit_event_sp) 3980 { 3981 // We shouldn't need to do anything else here. There's no process left to detach from... 3982 StopPrivateStateThread(); 3983 m_destroy_in_process = false; 3984 return error; 3985 } 3986 } 3987 3988 m_thread_list.DiscardThreadPlans(); 3989 DisableAllBreakpointSites(); 3990 3991 error = DoDetach(keep_stopped); 3992 if (error.Success()) 3993 { 3994 DidDetach(); 3995 StopPrivateStateThread(); 3996 } 3997 else 3998 { 3999 return error; 4000 } 4001 } 4002 m_destroy_in_process = false; 4003 4004 // If we exited when we were waiting for a process to stop, then 4005 // forward the event here so we don't lose the event 4006 if (exit_event_sp) 4007 { 4008 // Directly broadcast our exited event because we shut down our 4009 // private state thread above 4010 BroadcastEvent(exit_event_sp); 4011 } 4012 4013 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 4014 // the last events through the event system, in which case we might strand the write lock. Unlock 4015 // it here so when we do to tear down the process we don't get an error destroying the lock. 4016 4017 m_public_run_lock.SetStopped(); 4018 return error; 4019 } 4020 4021 Error 4022 Process::Destroy (bool force_kill) 4023 { 4024 4025 // Tell ourselves we are in the process of destroying the process, so that we don't do any unnecessary work 4026 // that might hinder the destruction. Remember to set this back to false when we are done. That way if the attempt 4027 // failed and the process stays around for some reason it won't be in a confused state. 4028 4029 if (force_kill) 4030 m_should_detach = false; 4031 4032 if (GetShouldDetach()) 4033 { 4034 // FIXME: This will have to be a process setting: 4035 bool keep_stopped = false; 4036 Detach(keep_stopped); 4037 } 4038 4039 m_destroy_in_process = true; 4040 4041 Error error (WillDestroy()); 4042 if (error.Success()) 4043 { 4044 EventSP exit_event_sp; 4045 if (DestroyRequiresHalt()) 4046 { 4047 error = StopForDestroyOrDetach(exit_event_sp); 4048 } 4049 4050 if (m_public_state.GetValue() != eStateRunning) 4051 { 4052 // Ditch all thread plans, and remove all our breakpoints: in case we have to restart the target to 4053 // kill it, we don't want it hitting a breakpoint... 4054 // Only do this if we've stopped, however, since if we didn't manage to halt it above, then 4055 // we're not going to have much luck doing this now. 4056 m_thread_list.DiscardThreadPlans(); 4057 DisableAllBreakpointSites(); 4058 } 4059 4060 error = DoDestroy(); 4061 if (error.Success()) 4062 { 4063 DidDestroy(); 4064 StopPrivateStateThread(); 4065 } 4066 m_stdio_communication.Disconnect(); 4067 m_stdio_communication.StopReadThread(); 4068 m_stdin_forward = false; 4069 4070 if (m_process_input_reader) 4071 { 4072 m_process_input_reader->SetIsDone(true); 4073 m_process_input_reader->Cancel(); 4074 m_process_input_reader.reset(); 4075 } 4076 4077 // If we exited when we were waiting for a process to stop, then 4078 // forward the event here so we don't lose the event 4079 if (exit_event_sp) 4080 { 4081 // Directly broadcast our exited event because we shut down our 4082 // private state thread above 4083 BroadcastEvent(exit_event_sp); 4084 } 4085 4086 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 4087 // the last events through the event system, in which case we might strand the write lock. Unlock 4088 // it here so when we do to tear down the process we don't get an error destroying the lock. 4089 m_public_run_lock.SetStopped(); 4090 } 4091 4092 m_destroy_in_process = false; 4093 4094 return error; 4095 } 4096 4097 Error 4098 Process::Signal (int signal) 4099 { 4100 Error error (WillSignal()); 4101 if (error.Success()) 4102 { 4103 error = DoSignal(signal); 4104 if (error.Success()) 4105 DidSignal(); 4106 } 4107 return error; 4108 } 4109 4110 void 4111 Process::SetUnixSignals(UnixSignalsSP &&signals_sp) 4112 { 4113 assert (signals_sp && "null signals_sp"); 4114 m_unix_signals_sp = signals_sp; 4115 } 4116 4117 const lldb::UnixSignalsSP & 4118 Process::GetUnixSignals () 4119 { 4120 assert (m_unix_signals_sp && "null m_unix_signals_sp"); 4121 return m_unix_signals_sp; 4122 } 4123 4124 lldb::ByteOrder 4125 Process::GetByteOrder () const 4126 { 4127 return GetTarget().GetArchitecture().GetByteOrder(); 4128 } 4129 4130 uint32_t 4131 Process::GetAddressByteSize () const 4132 { 4133 return GetTarget().GetArchitecture().GetAddressByteSize(); 4134 } 4135 4136 bool 4137 Process::ShouldBroadcastEvent (Event *event_ptr) 4138 { 4139 const StateType state = Process::ProcessEventData::GetStateFromEvent (event_ptr); 4140 bool return_value = true; 4141 Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_EVENTS | LIBLLDB_LOG_PROCESS)); 4142 4143 switch (state) 4144 { 4145 case eStateDetached: 4146 case eStateExited: 4147 case eStateUnloaded: 4148 m_stdio_communication.SynchronizeWithReadThread(); 4149 m_stdio_communication.Disconnect(); 4150 m_stdio_communication.StopReadThread(); 4151 m_stdin_forward = false; 4152 4153 // fall-through 4154 case eStateConnected: 4155 case eStateAttaching: 4156 case eStateLaunching: 4157 // These events indicate changes in the state of the debugging session, always report them. 4158 return_value = true; 4159 break; 4160 case eStateInvalid: 4161 // We stopped for no apparent reason, don't report it. 4162 return_value = false; 4163 break; 4164 case eStateRunning: 4165 case eStateStepping: 4166 // If we've started the target running, we handle the cases where we 4167 // are already running and where there is a transition from stopped to 4168 // running differently. 4169 // running -> running: Automatically suppress extra running events 4170 // stopped -> running: Report except when there is one or more no votes 4171 // and no yes votes. 4172 SynchronouslyNotifyStateChanged (state); 4173 if (m_force_next_event_delivery) 4174 return_value = true; 4175 else 4176 { 4177 switch (m_last_broadcast_state) 4178 { 4179 case eStateRunning: 4180 case eStateStepping: 4181 // We always suppress multiple runnings with no PUBLIC stop in between. 4182 return_value = false; 4183 break; 4184 default: 4185 // TODO: make this work correctly. For now always report 4186 // run if we aren't running so we don't miss any running 4187 // events. If I run the lldb/test/thread/a.out file and 4188 // break at main.cpp:58, run and hit the breakpoints on 4189 // multiple threads, then somehow during the stepping over 4190 // of all breakpoints no run gets reported. 4191 4192 // This is a transition from stop to run. 4193 switch (m_thread_list.ShouldReportRun (event_ptr)) 4194 { 4195 case eVoteYes: 4196 case eVoteNoOpinion: 4197 return_value = true; 4198 break; 4199 case eVoteNo: 4200 return_value = false; 4201 break; 4202 } 4203 break; 4204 } 4205 } 4206 break; 4207 case eStateStopped: 4208 case eStateCrashed: 4209 case eStateSuspended: 4210 { 4211 // We've stopped. First see if we're going to restart the target. 4212 // If we are going to stop, then we always broadcast the event. 4213 // If we aren't going to stop, let the thread plans decide if we're going to report this event. 4214 // If no thread has an opinion, we don't report it. 4215 4216 m_stdio_communication.SynchronizeWithReadThread(); 4217 RefreshStateAfterStop (); 4218 if (ProcessEventData::GetInterruptedFromEvent (event_ptr)) 4219 { 4220 if (log) 4221 log->Printf ("Process::ShouldBroadcastEvent (%p) stopped due to an interrupt, state: %s", 4222 static_cast<void*>(event_ptr), 4223 StateAsCString(state)); 4224 // Even though we know we are going to stop, we should let the threads have a look at the stop, 4225 // so they can properly set their state. 4226 m_thread_list.ShouldStop (event_ptr); 4227 return_value = true; 4228 } 4229 else 4230 { 4231 bool was_restarted = ProcessEventData::GetRestartedFromEvent (event_ptr); 4232 bool should_resume = false; 4233 4234 // It makes no sense to ask "ShouldStop" if we've already been restarted... 4235 // Asking the thread list is also not likely to go well, since we are running again. 4236 // So in that case just report the event. 4237 4238 if (!was_restarted) 4239 should_resume = m_thread_list.ShouldStop (event_ptr) == false; 4240 4241 if (was_restarted || should_resume || m_resume_requested) 4242 { 4243 Vote stop_vote = m_thread_list.ShouldReportStop (event_ptr); 4244 if (log) 4245 log->Printf ("Process::ShouldBroadcastEvent: should_stop: %i state: %s was_restarted: %i stop_vote: %d.", 4246 should_resume, StateAsCString(state), 4247 was_restarted, stop_vote); 4248 4249 switch (stop_vote) 4250 { 4251 case eVoteYes: 4252 return_value = true; 4253 break; 4254 case eVoteNoOpinion: 4255 case eVoteNo: 4256 return_value = false; 4257 break; 4258 } 4259 4260 if (!was_restarted) 4261 { 4262 if (log) 4263 log->Printf ("Process::ShouldBroadcastEvent (%p) Restarting process from state: %s", 4264 static_cast<void*>(event_ptr), 4265 StateAsCString(state)); 4266 ProcessEventData::SetRestartedInEvent(event_ptr, true); 4267 PrivateResume (); 4268 } 4269 } 4270 else 4271 { 4272 return_value = true; 4273 SynchronouslyNotifyStateChanged (state); 4274 } 4275 } 4276 } 4277 break; 4278 } 4279 4280 // Forcing the next event delivery is a one shot deal. So reset it here. 4281 m_force_next_event_delivery = false; 4282 4283 // We do some coalescing of events (for instance two consecutive running events get coalesced.) 4284 // But we only coalesce against events we actually broadcast. So we use m_last_broadcast_state 4285 // to track that. NB - you can't use "m_public_state.GetValue()" for that purpose, as was originally done, 4286 // because the PublicState reflects the last event pulled off the queue, and there may be several 4287 // events stacked up on the queue unserviced. So the PublicState may not reflect the last broadcasted event 4288 // yet. m_last_broadcast_state gets updated here. 4289 4290 if (return_value) 4291 m_last_broadcast_state = state; 4292 4293 if (log) 4294 log->Printf ("Process::ShouldBroadcastEvent (%p) => new state: %s, last broadcast state: %s - %s", 4295 static_cast<void*>(event_ptr), StateAsCString(state), 4296 StateAsCString(m_last_broadcast_state), 4297 return_value ? "YES" : "NO"); 4298 return return_value; 4299 } 4300 4301 bool 4302 Process::StartPrivateStateThread (bool is_secondary_thread) 4303 { 4304 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EVENTS)); 4305 4306 bool already_running = PrivateStateThreadIsValid (); 4307 if (log) 4308 log->Printf ("Process::%s()%s ", __FUNCTION__, already_running ? " already running" : " starting private state thread"); 4309 4310 if (!is_secondary_thread && already_running) 4311 return true; 4312 4313 // Create a thread that watches our internal state and controls which 4314 // events make it to clients (into the DCProcess event queue). 4315 char thread_name[1024]; 4316 4317 if (HostInfo::GetMaxThreadNameLength() <= 30) 4318 { 4319 // On platforms with abbreviated thread name lengths, choose thread names that fit within the limit. 4320 if (already_running) 4321 snprintf(thread_name, sizeof(thread_name), "intern-state-OV"); 4322 else 4323 snprintf(thread_name, sizeof(thread_name), "intern-state"); 4324 } 4325 else 4326 { 4327 if (already_running) 4328 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state-override(pid=%" PRIu64 ")>", GetID()); 4329 else 4330 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state(pid=%" PRIu64 ")>", GetID()); 4331 } 4332 4333 // Create the private state thread, and start it running. 4334 PrivateStateThreadArgs args = {this, is_secondary_thread}; 4335 m_private_state_thread = ThreadLauncher::LaunchThread(thread_name, Process::PrivateStateThread, (void *) &args, NULL); 4336 if (m_private_state_thread.IsJoinable()) 4337 { 4338 ResumePrivateStateThread(); 4339 return true; 4340 } 4341 else 4342 return false; 4343 } 4344 4345 void 4346 Process::PausePrivateStateThread () 4347 { 4348 ControlPrivateStateThread (eBroadcastInternalStateControlPause); 4349 } 4350 4351 void 4352 Process::ResumePrivateStateThread () 4353 { 4354 ControlPrivateStateThread (eBroadcastInternalStateControlResume); 4355 } 4356 4357 void 4358 Process::StopPrivateStateThread () 4359 { 4360 if (PrivateStateThreadIsValid ()) 4361 ControlPrivateStateThread (eBroadcastInternalStateControlStop); 4362 else 4363 { 4364 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4365 if (log) 4366 log->Printf ("Went to stop the private state thread, but it was already invalid."); 4367 } 4368 } 4369 4370 void 4371 Process::ControlPrivateStateThread (uint32_t signal) 4372 { 4373 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4374 4375 assert (signal == eBroadcastInternalStateControlStop || 4376 signal == eBroadcastInternalStateControlPause || 4377 signal == eBroadcastInternalStateControlResume); 4378 4379 if (log) 4380 log->Printf ("Process::%s (signal = %d)", __FUNCTION__, signal); 4381 4382 // Signal the private state thread. First we should copy this is case the 4383 // thread starts exiting since the private state thread will NULL this out 4384 // when it exits 4385 HostThread private_state_thread(m_private_state_thread); 4386 if (private_state_thread.IsJoinable()) 4387 { 4388 TimeValue timeout_time; 4389 bool timed_out; 4390 4391 m_private_state_control_broadcaster.BroadcastEvent (signal, NULL); 4392 4393 timeout_time = TimeValue::Now(); 4394 timeout_time.OffsetWithSeconds(2); 4395 if (log) 4396 log->Printf ("Sending control event of type: %d.", signal); 4397 m_private_state_control_wait.WaitForValueEqualTo (true, &timeout_time, &timed_out); 4398 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4399 4400 if (signal == eBroadcastInternalStateControlStop) 4401 { 4402 if (timed_out) 4403 { 4404 Error error = private_state_thread.Cancel(); 4405 if (log) 4406 log->Printf ("Timed out responding to the control event, cancel got error: \"%s\".", error.AsCString()); 4407 } 4408 else 4409 { 4410 if (log) 4411 log->Printf ("The control event killed the private state thread without having to cancel."); 4412 } 4413 4414 thread_result_t result = NULL; 4415 private_state_thread.Join(&result); 4416 m_private_state_thread.Reset(); 4417 } 4418 } 4419 else 4420 { 4421 if (log) 4422 log->Printf ("Private state thread already dead, no need to signal it to stop."); 4423 } 4424 } 4425 4426 void 4427 Process::SendAsyncInterrupt () 4428 { 4429 if (PrivateStateThreadIsValid()) 4430 m_private_state_broadcaster.BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4431 else 4432 BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4433 } 4434 4435 void 4436 Process::HandlePrivateEvent (EventSP &event_sp) 4437 { 4438 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4439 m_resume_requested = false; 4440 4441 m_currently_handling_event.SetValue(true, eBroadcastNever); 4442 4443 const StateType new_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4444 4445 // First check to see if anybody wants a shot at this event: 4446 if (m_next_event_action_ap.get() != NULL) 4447 { 4448 NextEventAction::EventActionResult action_result = m_next_event_action_ap->PerformAction(event_sp); 4449 if (log) 4450 log->Printf ("Ran next event action, result was %d.", action_result); 4451 4452 switch (action_result) 4453 { 4454 case NextEventAction::eEventActionSuccess: 4455 SetNextEventAction(NULL); 4456 break; 4457 4458 case NextEventAction::eEventActionRetry: 4459 break; 4460 4461 case NextEventAction::eEventActionExit: 4462 // Handle Exiting Here. If we already got an exited event, 4463 // we should just propagate it. Otherwise, swallow this event, 4464 // and set our state to exit so the next event will kill us. 4465 if (new_state != eStateExited) 4466 { 4467 // FIXME: should cons up an exited event, and discard this one. 4468 SetExitStatus(0, m_next_event_action_ap->GetExitString()); 4469 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4470 SetNextEventAction(NULL); 4471 return; 4472 } 4473 SetNextEventAction(NULL); 4474 break; 4475 } 4476 } 4477 4478 // See if we should broadcast this state to external clients? 4479 const bool should_broadcast = ShouldBroadcastEvent (event_sp.get()); 4480 4481 if (should_broadcast) 4482 { 4483 const bool is_hijacked = IsHijackedForEvent(eBroadcastBitStateChanged); 4484 if (log) 4485 { 4486 log->Printf ("Process::%s (pid = %" PRIu64 ") broadcasting new state %s (old state %s) to %s", 4487 __FUNCTION__, 4488 GetID(), 4489 StateAsCString(new_state), 4490 StateAsCString (GetState ()), 4491 is_hijacked ? "hijacked" : "public"); 4492 } 4493 Process::ProcessEventData::SetUpdateStateOnRemoval(event_sp.get()); 4494 if (StateIsRunningState (new_state)) 4495 { 4496 // Only push the input handler if we aren't fowarding events, 4497 // as this means the curses GUI is in use... 4498 // Or don't push it if we are launching since it will come up stopped. 4499 if (!GetTarget().GetDebugger().IsForwardingEvents() && new_state != eStateLaunching && 4500 new_state != eStateAttaching) 4501 { 4502 PushProcessIOHandler (); 4503 m_iohandler_sync.SetValue(m_iohandler_sync.GetValue()+1, eBroadcastAlways); 4504 if (log) 4505 log->Printf("Process::%s updated m_iohandler_sync to %d", __FUNCTION__, m_iohandler_sync.GetValue()); 4506 } 4507 } 4508 else if (StateIsStoppedState(new_state, false)) 4509 { 4510 if (!Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 4511 { 4512 // If the lldb_private::Debugger is handling the events, we don't 4513 // want to pop the process IOHandler here, we want to do it when 4514 // we receive the stopped event so we can carefully control when 4515 // the process IOHandler is popped because when we stop we want to 4516 // display some text stating how and why we stopped, then maybe some 4517 // process/thread/frame info, and then we want the "(lldb) " prompt 4518 // to show up. If we pop the process IOHandler here, then we will 4519 // cause the command interpreter to become the top IOHandler after 4520 // the process pops off and it will update its prompt right away... 4521 // See the Debugger.cpp file where it calls the function as 4522 // "process_sp->PopProcessIOHandler()" to see where I am talking about. 4523 // Otherwise we end up getting overlapping "(lldb) " prompts and 4524 // garbled output. 4525 // 4526 // If we aren't handling the events in the debugger (which is indicated 4527 // by "m_target.GetDebugger().IsHandlingEvents()" returning false) or we 4528 // are hijacked, then we always pop the process IO handler manually. 4529 // Hijacking happens when the internal process state thread is running 4530 // thread plans, or when commands want to run in synchronous mode 4531 // and they call "process->WaitForProcessToStop()". An example of something 4532 // that will hijack the events is a simple expression: 4533 // 4534 // (lldb) expr (int)puts("hello") 4535 // 4536 // This will cause the internal process state thread to resume and halt 4537 // the process (and _it_ will hijack the eBroadcastBitStateChanged 4538 // events) and we do need the IO handler to be pushed and popped 4539 // correctly. 4540 4541 if (is_hijacked || GetTarget().GetDebugger().IsHandlingEvents() == false) 4542 PopProcessIOHandler (); 4543 } 4544 } 4545 4546 BroadcastEvent (event_sp); 4547 } 4548 else 4549 { 4550 if (log) 4551 { 4552 log->Printf ("Process::%s (pid = %" PRIu64 ") suppressing state %s (old state %s): should_broadcast == false", 4553 __FUNCTION__, 4554 GetID(), 4555 StateAsCString(new_state), 4556 StateAsCString (GetState ())); 4557 } 4558 } 4559 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4560 } 4561 4562 thread_result_t 4563 Process::PrivateStateThread (void *arg) 4564 { 4565 PrivateStateThreadArgs *real_args = static_cast<PrivateStateThreadArgs *> (arg); 4566 thread_result_t result = real_args->process->RunPrivateStateThread(real_args->is_secondary_thread); 4567 return result; 4568 } 4569 4570 thread_result_t 4571 Process::RunPrivateStateThread (bool is_secondary_thread) 4572 { 4573 bool control_only = true; 4574 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4575 4576 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4577 if (log) 4578 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread starting...", 4579 __FUNCTION__, static_cast<void*>(this), GetID()); 4580 4581 bool exit_now = false; 4582 while (!exit_now) 4583 { 4584 EventSP event_sp; 4585 WaitForEventsPrivate (NULL, event_sp, control_only); 4586 if (event_sp->BroadcasterIs(&m_private_state_control_broadcaster)) 4587 { 4588 if (log) 4589 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") got a control event: %d", 4590 __FUNCTION__, static_cast<void*>(this), GetID(), 4591 event_sp->GetType()); 4592 4593 switch (event_sp->GetType()) 4594 { 4595 case eBroadcastInternalStateControlStop: 4596 exit_now = true; 4597 break; // doing any internal state management below 4598 4599 case eBroadcastInternalStateControlPause: 4600 control_only = true; 4601 break; 4602 4603 case eBroadcastInternalStateControlResume: 4604 control_only = false; 4605 break; 4606 } 4607 4608 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4609 continue; 4610 } 4611 else if (event_sp->GetType() == eBroadcastBitInterrupt) 4612 { 4613 if (m_public_state.GetValue() == eStateAttaching) 4614 { 4615 if (log) 4616 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt while attaching - forwarding interrupt.", 4617 __FUNCTION__, static_cast<void*>(this), 4618 GetID()); 4619 BroadcastEvent (eBroadcastBitInterrupt, NULL); 4620 } 4621 else 4622 { 4623 if (log) 4624 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt - Halting.", 4625 __FUNCTION__, static_cast<void*>(this), 4626 GetID()); 4627 Halt(); 4628 } 4629 continue; 4630 } 4631 4632 const StateType internal_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4633 4634 if (internal_state != eStateInvalid) 4635 { 4636 if (m_clear_thread_plans_on_stop && 4637 StateIsStoppedState(internal_state, true)) 4638 { 4639 m_clear_thread_plans_on_stop = false; 4640 m_thread_list.DiscardThreadPlans(); 4641 } 4642 HandlePrivateEvent (event_sp); 4643 } 4644 4645 if (internal_state == eStateInvalid || 4646 internal_state == eStateExited || 4647 internal_state == eStateDetached ) 4648 { 4649 if (log) 4650 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") about to exit with internal state %s...", 4651 __FUNCTION__, static_cast<void*>(this), GetID(), 4652 StateAsCString(internal_state)); 4653 4654 break; 4655 } 4656 } 4657 4658 // Verify log is still enabled before attempting to write to it... 4659 if (log) 4660 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", 4661 __FUNCTION__, static_cast<void*>(this), GetID()); 4662 4663 // If we are a secondary thread, then the primary thread we are working for will have already 4664 // acquired the public_run_lock, and isn't done with what it was doing yet, so don't 4665 // try to change it on the way out. 4666 if (!is_secondary_thread) 4667 m_public_run_lock.SetStopped(); 4668 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4669 m_private_state_thread.Reset(); 4670 return NULL; 4671 } 4672 4673 //------------------------------------------------------------------ 4674 // Process Event Data 4675 //------------------------------------------------------------------ 4676 4677 Process::ProcessEventData::ProcessEventData () : 4678 EventData (), 4679 m_process_wp (), 4680 m_state (eStateInvalid), 4681 m_restarted (false), 4682 m_update_state (0), 4683 m_interrupted (false) 4684 { 4685 } 4686 4687 Process::ProcessEventData::ProcessEventData (const ProcessSP &process_sp, StateType state) : 4688 EventData (), 4689 m_process_wp (), 4690 m_state (state), 4691 m_restarted (false), 4692 m_update_state (0), 4693 m_interrupted (false) 4694 { 4695 if (process_sp) 4696 m_process_wp = process_sp; 4697 } 4698 4699 Process::ProcessEventData::~ProcessEventData() = default; 4700 4701 const ConstString & 4702 Process::ProcessEventData::GetFlavorString () 4703 { 4704 static ConstString g_flavor ("Process::ProcessEventData"); 4705 return g_flavor; 4706 } 4707 4708 const ConstString & 4709 Process::ProcessEventData::GetFlavor () const 4710 { 4711 return ProcessEventData::GetFlavorString (); 4712 } 4713 4714 void 4715 Process::ProcessEventData::DoOnRemoval (Event *event_ptr) 4716 { 4717 ProcessSP process_sp(m_process_wp.lock()); 4718 4719 if (!process_sp) 4720 return; 4721 4722 // This function gets called twice for each event, once when the event gets pulled 4723 // off of the private process event queue, and then any number of times, first when it gets pulled off of 4724 // the public event queue, then other times when we're pretending that this is where we stopped at the 4725 // end of expression evaluation. m_update_state is used to distinguish these 4726 // three cases; it is 0 when we're just pulling it off for private handling, 4727 // and > 1 for expression evaluation, and we don't want to do the breakpoint command handling then. 4728 if (m_update_state != 1) 4729 return; 4730 4731 process_sp->SetPublicState (m_state, Process::ProcessEventData::GetRestartedFromEvent(event_ptr)); 4732 4733 // If this is a halt event, even if the halt stopped with some reason other than a plain interrupt (e.g. we had 4734 // already stopped for a breakpoint when the halt request came through) don't do the StopInfo actions, as they may 4735 // end up restarting the process. 4736 if (m_interrupted) 4737 return; 4738 4739 // If we're stopped and haven't restarted, then do the StopInfo actions here: 4740 if (m_state == eStateStopped && ! m_restarted) 4741 { 4742 // Let process subclasses know we are about to do a public stop and 4743 // do anything they might need to in order to speed up register and 4744 // memory accesses. 4745 process_sp->WillPublicStop(); 4746 4747 ThreadList &curr_thread_list = process_sp->GetThreadList(); 4748 uint32_t num_threads = curr_thread_list.GetSize(); 4749 uint32_t idx; 4750 4751 // The actions might change one of the thread's stop_info's opinions about whether we should 4752 // stop the process, so we need to query that as we go. 4753 4754 // One other complication here, is that we try to catch any case where the target has run (except for expressions) 4755 // and immediately exit, but if we get that wrong (which is possible) then the thread list might have changed, and 4756 // that would cause our iteration here to crash. We could make a copy of the thread list, but we'd really like 4757 // 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 4758 // against this list & bag out if anything differs. 4759 std::vector<uint32_t> thread_index_array(num_threads); 4760 for (idx = 0; idx < num_threads; ++idx) 4761 thread_index_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetIndexID(); 4762 4763 // Use this to track whether we should continue from here. We will only continue the target running if 4764 // no thread says we should stop. Of course if some thread's PerformAction actually sets the target running, 4765 // then it doesn't matter what the other threads say... 4766 4767 bool still_should_stop = false; 4768 4769 // Sometimes - for instance if we have a bug in the stub we are talking to, we stop but no thread has a 4770 // valid stop reason. In that case we should just stop, because we have no way of telling what the right 4771 // thing to do is, and it's better to let the user decide than continue behind their backs. 4772 4773 bool does_anybody_have_an_opinion = false; 4774 4775 for (idx = 0; idx < num_threads; ++idx) 4776 { 4777 curr_thread_list = process_sp->GetThreadList(); 4778 if (curr_thread_list.GetSize() != num_threads) 4779 { 4780 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4781 if (log) 4782 log->Printf("Number of threads changed from %u to %u while processing event.", num_threads, curr_thread_list.GetSize()); 4783 break; 4784 } 4785 4786 lldb::ThreadSP thread_sp = curr_thread_list.GetThreadAtIndex(idx); 4787 4788 if (thread_sp->GetIndexID() != thread_index_array[idx]) 4789 { 4790 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4791 if (log) 4792 log->Printf("The thread at position %u changed from %u to %u while processing event.", 4793 idx, 4794 thread_index_array[idx], 4795 thread_sp->GetIndexID()); 4796 break; 4797 } 4798 4799 StopInfoSP stop_info_sp = thread_sp->GetStopInfo (); 4800 if (stop_info_sp && stop_info_sp->IsValid()) 4801 { 4802 does_anybody_have_an_opinion = true; 4803 bool this_thread_wants_to_stop; 4804 if (stop_info_sp->GetOverrideShouldStop()) 4805 { 4806 this_thread_wants_to_stop = stop_info_sp->GetOverriddenShouldStopValue(); 4807 } 4808 else 4809 { 4810 stop_info_sp->PerformAction(event_ptr); 4811 // The stop action might restart the target. If it does, then we want to mark that in the 4812 // event so that whoever is receiving it will know to wait for the running event and reflect 4813 // that state appropriately. 4814 // We also need to stop processing actions, since they aren't expecting the target to be running. 4815 4816 // FIXME: we might have run. 4817 if (stop_info_sp->HasTargetRunSinceMe()) 4818 { 4819 SetRestarted (true); 4820 break; 4821 } 4822 4823 this_thread_wants_to_stop = stop_info_sp->ShouldStop(event_ptr); 4824 } 4825 4826 if (still_should_stop == false) 4827 still_should_stop = this_thread_wants_to_stop; 4828 } 4829 } 4830 4831 if (!GetRestarted()) 4832 { 4833 if (!still_should_stop && does_anybody_have_an_opinion) 4834 { 4835 // We've been asked to continue, so do that here. 4836 SetRestarted(true); 4837 // Use the public resume method here, since this is just 4838 // extending a public resume. 4839 process_sp->PrivateResume(); 4840 } 4841 else 4842 { 4843 // If we didn't restart, run the Stop Hooks here: 4844 // They might also restart the target, so watch for that. 4845 process_sp->GetTarget().RunStopHooks(); 4846 if (process_sp->GetPrivateState() == eStateRunning) 4847 SetRestarted(true); 4848 } 4849 } 4850 } 4851 } 4852 4853 void 4854 Process::ProcessEventData::Dump (Stream *s) const 4855 { 4856 ProcessSP process_sp(m_process_wp.lock()); 4857 4858 if (process_sp) 4859 s->Printf(" process = %p (pid = %" PRIu64 "), ", 4860 static_cast<void*>(process_sp.get()), process_sp->GetID()); 4861 else 4862 s->PutCString(" process = NULL, "); 4863 4864 s->Printf("state = %s", StateAsCString(GetState())); 4865 } 4866 4867 const Process::ProcessEventData * 4868 Process::ProcessEventData::GetEventDataFromEvent (const Event *event_ptr) 4869 { 4870 if (event_ptr) 4871 { 4872 const EventData *event_data = event_ptr->GetData(); 4873 if (event_data && event_data->GetFlavor() == ProcessEventData::GetFlavorString()) 4874 return static_cast <const ProcessEventData *> (event_ptr->GetData()); 4875 } 4876 return NULL; 4877 } 4878 4879 ProcessSP 4880 Process::ProcessEventData::GetProcessFromEvent (const Event *event_ptr) 4881 { 4882 ProcessSP process_sp; 4883 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4884 if (data) 4885 process_sp = data->GetProcessSP(); 4886 return process_sp; 4887 } 4888 4889 StateType 4890 Process::ProcessEventData::GetStateFromEvent (const Event *event_ptr) 4891 { 4892 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4893 if (data == NULL) 4894 return eStateInvalid; 4895 else 4896 return data->GetState(); 4897 } 4898 4899 bool 4900 Process::ProcessEventData::GetRestartedFromEvent (const Event *event_ptr) 4901 { 4902 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4903 if (data == NULL) 4904 return false; 4905 else 4906 return data->GetRestarted(); 4907 } 4908 4909 void 4910 Process::ProcessEventData::SetRestartedInEvent (Event *event_ptr, bool new_value) 4911 { 4912 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4913 if (data != NULL) 4914 data->SetRestarted(new_value); 4915 } 4916 4917 size_t 4918 Process::ProcessEventData::GetNumRestartedReasons(const Event *event_ptr) 4919 { 4920 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4921 if (data != NULL) 4922 return data->GetNumRestartedReasons(); 4923 else 4924 return 0; 4925 } 4926 4927 const char * 4928 Process::ProcessEventData::GetRestartedReasonAtIndex(const Event *event_ptr, size_t idx) 4929 { 4930 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4931 if (data != NULL) 4932 return data->GetRestartedReasonAtIndex(idx); 4933 else 4934 return NULL; 4935 } 4936 4937 void 4938 Process::ProcessEventData::AddRestartedReason (Event *event_ptr, const char *reason) 4939 { 4940 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4941 if (data != NULL) 4942 data->AddRestartedReason(reason); 4943 } 4944 4945 bool 4946 Process::ProcessEventData::GetInterruptedFromEvent (const Event *event_ptr) 4947 { 4948 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4949 if (data == NULL) 4950 return false; 4951 else 4952 return data->GetInterrupted (); 4953 } 4954 4955 void 4956 Process::ProcessEventData::SetInterruptedInEvent (Event *event_ptr, bool new_value) 4957 { 4958 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4959 if (data != NULL) 4960 data->SetInterrupted(new_value); 4961 } 4962 4963 bool 4964 Process::ProcessEventData::SetUpdateStateOnRemoval (Event *event_ptr) 4965 { 4966 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4967 if (data) 4968 { 4969 data->SetUpdateStateOnRemoval(); 4970 return true; 4971 } 4972 return false; 4973 } 4974 4975 lldb::TargetSP 4976 Process::CalculateTarget () 4977 { 4978 return m_target_sp.lock(); 4979 } 4980 4981 void 4982 Process::CalculateExecutionContext (ExecutionContext &exe_ctx) 4983 { 4984 exe_ctx.SetTargetPtr (&GetTarget()); 4985 exe_ctx.SetProcessPtr (this); 4986 exe_ctx.SetThreadPtr(NULL); 4987 exe_ctx.SetFramePtr (NULL); 4988 } 4989 4990 //uint32_t 4991 //Process::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 4992 //{ 4993 // return 0; 4994 //} 4995 // 4996 //ArchSpec 4997 //Process::GetArchSpecForExistingProcess (lldb::pid_t pid) 4998 //{ 4999 // return Host::GetArchSpecForExistingProcess (pid); 5000 //} 5001 // 5002 //ArchSpec 5003 //Process::GetArchSpecForExistingProcess (const char *process_name) 5004 //{ 5005 // return Host::GetArchSpecForExistingProcess (process_name); 5006 //} 5007 // 5008 void 5009 Process::AppendSTDOUT (const char * s, size_t len) 5010 { 5011 Mutex::Locker locker (m_stdio_communication_mutex); 5012 m_stdout_data.append (s, len); 5013 BroadcastEventIfUnique (eBroadcastBitSTDOUT, new ProcessEventData (shared_from_this(), GetState())); 5014 } 5015 5016 void 5017 Process::AppendSTDERR (const char * s, size_t len) 5018 { 5019 Mutex::Locker locker (m_stdio_communication_mutex); 5020 m_stderr_data.append (s, len); 5021 BroadcastEventIfUnique (eBroadcastBitSTDERR, new ProcessEventData (shared_from_this(), GetState())); 5022 } 5023 5024 void 5025 Process::BroadcastAsyncProfileData(const std::string &one_profile_data) 5026 { 5027 Mutex::Locker locker (m_profile_data_comm_mutex); 5028 m_profile_data.push_back(one_profile_data); 5029 BroadcastEventIfUnique (eBroadcastBitProfileData, new ProcessEventData (shared_from_this(), GetState())); 5030 } 5031 5032 size_t 5033 Process::GetAsyncProfileData (char *buf, size_t buf_size, Error &error) 5034 { 5035 Mutex::Locker locker(m_profile_data_comm_mutex); 5036 if (m_profile_data.empty()) 5037 return 0; 5038 5039 std::string &one_profile_data = m_profile_data.front(); 5040 size_t bytes_available = one_profile_data.size(); 5041 if (bytes_available > 0) 5042 { 5043 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5044 if (log) 5045 log->Printf ("Process::GetProfileData (buf = %p, size = %" PRIu64 ")", 5046 static_cast<void*>(buf), 5047 static_cast<uint64_t>(buf_size)); 5048 if (bytes_available > buf_size) 5049 { 5050 memcpy(buf, one_profile_data.c_str(), buf_size); 5051 one_profile_data.erase(0, buf_size); 5052 bytes_available = buf_size; 5053 } 5054 else 5055 { 5056 memcpy(buf, one_profile_data.c_str(), bytes_available); 5057 m_profile_data.erase(m_profile_data.begin()); 5058 } 5059 } 5060 return bytes_available; 5061 } 5062 5063 //------------------------------------------------------------------ 5064 // Process STDIO 5065 //------------------------------------------------------------------ 5066 5067 size_t 5068 Process::GetSTDOUT (char *buf, size_t buf_size, Error &error) 5069 { 5070 Mutex::Locker locker(m_stdio_communication_mutex); 5071 size_t bytes_available = m_stdout_data.size(); 5072 if (bytes_available > 0) 5073 { 5074 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5075 if (log) 5076 log->Printf ("Process::GetSTDOUT (buf = %p, size = %" PRIu64 ")", 5077 static_cast<void*>(buf), 5078 static_cast<uint64_t>(buf_size)); 5079 if (bytes_available > buf_size) 5080 { 5081 memcpy(buf, m_stdout_data.c_str(), buf_size); 5082 m_stdout_data.erase(0, buf_size); 5083 bytes_available = buf_size; 5084 } 5085 else 5086 { 5087 memcpy(buf, m_stdout_data.c_str(), bytes_available); 5088 m_stdout_data.clear(); 5089 } 5090 } 5091 return bytes_available; 5092 } 5093 5094 size_t 5095 Process::GetSTDERR (char *buf, size_t buf_size, Error &error) 5096 { 5097 Mutex::Locker locker(m_stdio_communication_mutex); 5098 size_t bytes_available = m_stderr_data.size(); 5099 if (bytes_available > 0) 5100 { 5101 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5102 if (log) 5103 log->Printf ("Process::GetSTDERR (buf = %p, size = %" PRIu64 ")", 5104 static_cast<void*>(buf), 5105 static_cast<uint64_t>(buf_size)); 5106 if (bytes_available > buf_size) 5107 { 5108 memcpy(buf, m_stderr_data.c_str(), buf_size); 5109 m_stderr_data.erase(0, buf_size); 5110 bytes_available = buf_size; 5111 } 5112 else 5113 { 5114 memcpy(buf, m_stderr_data.c_str(), bytes_available); 5115 m_stderr_data.clear(); 5116 } 5117 } 5118 return bytes_available; 5119 } 5120 5121 void 5122 Process::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len) 5123 { 5124 Process *process = (Process *) baton; 5125 process->AppendSTDOUT (static_cast<const char *>(src), src_len); 5126 } 5127 5128 class IOHandlerProcessSTDIO : 5129 public IOHandler 5130 { 5131 public: 5132 IOHandlerProcessSTDIO (Process *process, 5133 int write_fd) : 5134 IOHandler(process->GetTarget().GetDebugger(), IOHandler::Type::ProcessIO), 5135 m_process (process), 5136 m_read_file (), 5137 m_write_file (write_fd, false), 5138 m_pipe () 5139 { 5140 m_pipe.CreateNew(false); 5141 m_read_file.SetDescriptor(GetInputFD(), false); 5142 } 5143 5144 ~IOHandlerProcessSTDIO() override = default; 5145 5146 // Each IOHandler gets to run until it is done. It should read data 5147 // from the "in" and place output into "out" and "err and return 5148 // when done. 5149 void 5150 Run () override 5151 { 5152 if (!m_read_file.IsValid() || !m_write_file.IsValid() || !m_pipe.CanRead() || !m_pipe.CanWrite()) 5153 { 5154 SetIsDone(true); 5155 return; 5156 } 5157 5158 SetIsDone(false); 5159 const int read_fd = m_read_file.GetDescriptor(); 5160 TerminalState terminal_state; 5161 terminal_state.Save (read_fd, false); 5162 Terminal terminal(read_fd); 5163 terminal.SetCanonical(false); 5164 terminal.SetEcho(false); 5165 // FD_ZERO, FD_SET are not supported on windows 5166 #ifndef _WIN32 5167 const int pipe_read_fd = m_pipe.GetReadFileDescriptor(); 5168 while (!GetIsDone()) 5169 { 5170 fd_set read_fdset; 5171 FD_ZERO (&read_fdset); 5172 FD_SET (read_fd, &read_fdset); 5173 FD_SET (pipe_read_fd, &read_fdset); 5174 const int nfds = std::max<int>(read_fd, pipe_read_fd) + 1; 5175 int num_set_fds = select (nfds, &read_fdset, NULL, NULL, NULL); 5176 if (num_set_fds < 0) 5177 { 5178 const int select_errno = errno; 5179 5180 if (select_errno != EINTR) 5181 SetIsDone(true); 5182 } 5183 else if (num_set_fds > 0) 5184 { 5185 char ch = 0; 5186 size_t n; 5187 if (FD_ISSET (read_fd, &read_fdset)) 5188 { 5189 n = 1; 5190 if (m_read_file.Read(&ch, n).Success() && n == 1) 5191 { 5192 if (m_write_file.Write(&ch, n).Fail() || n != 1) 5193 SetIsDone(true); 5194 } 5195 else 5196 SetIsDone(true); 5197 } 5198 if (FD_ISSET (pipe_read_fd, &read_fdset)) 5199 { 5200 size_t bytes_read; 5201 // Consume the interrupt byte 5202 Error error = m_pipe.Read(&ch, 1, bytes_read); 5203 if (error.Success()) 5204 { 5205 switch (ch) 5206 { 5207 case 'q': 5208 SetIsDone(true); 5209 break; 5210 case 'i': 5211 if (StateIsRunningState(m_process->GetState())) 5212 m_process->SendAsyncInterrupt(); 5213 break; 5214 } 5215 } 5216 } 5217 } 5218 } 5219 #endif 5220 terminal_state.Restore(); 5221 } 5222 5223 void 5224 Cancel () override 5225 { 5226 char ch = 'q'; // Send 'q' for quit 5227 size_t bytes_written = 0; 5228 m_pipe.Write(&ch, 1, bytes_written); 5229 } 5230 5231 bool 5232 Interrupt () override 5233 { 5234 // Do only things that are safe to do in an interrupt context (like in 5235 // a SIGINT handler), like write 1 byte to a file descriptor. This will 5236 // interrupt the IOHandlerProcessSTDIO::Run() and we can look at the byte 5237 // that was written to the pipe and then call m_process->SendAsyncInterrupt() 5238 // from a much safer location in code. 5239 if (m_active) 5240 { 5241 char ch = 'i'; // Send 'i' for interrupt 5242 size_t bytes_written = 0; 5243 Error result = m_pipe.Write(&ch, 1, bytes_written); 5244 return result.Success(); 5245 } 5246 else 5247 { 5248 // This IOHandler might be pushed on the stack, but not being run currently 5249 // so do the right thing if we aren't actively watching for STDIN by sending 5250 // the interrupt to the process. Otherwise the write to the pipe above would 5251 // do nothing. This can happen when the command interpreter is running and 5252 // gets a "expression ...". It will be on the IOHandler thread and sending 5253 // the input is complete to the delegate which will cause the expression to 5254 // run, which will push the process IO handler, but not run it. 5255 5256 if (StateIsRunningState(m_process->GetState())) 5257 { 5258 m_process->SendAsyncInterrupt(); 5259 return true; 5260 } 5261 } 5262 return false; 5263 } 5264 5265 void 5266 GotEOF() override 5267 { 5268 } 5269 5270 protected: 5271 Process *m_process; 5272 File m_read_file; // Read from this file (usually actual STDIN for LLDB 5273 File m_write_file; // Write to this file (usually the master pty for getting io to debuggee) 5274 Pipe m_pipe; 5275 }; 5276 5277 void 5278 Process::SetSTDIOFileDescriptor (int fd) 5279 { 5280 // First set up the Read Thread for reading/handling process I/O 5281 5282 std::unique_ptr<ConnectionFileDescriptor> conn_ap (new ConnectionFileDescriptor (fd, true)); 5283 5284 if (conn_ap.get()) 5285 { 5286 m_stdio_communication.SetConnection (conn_ap.release()); 5287 if (m_stdio_communication.IsConnected()) 5288 { 5289 m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this); 5290 m_stdio_communication.StartReadThread(); 5291 5292 // Now read thread is set up, set up input reader. 5293 5294 if (!m_process_input_reader.get()) 5295 m_process_input_reader.reset (new IOHandlerProcessSTDIO (this, fd)); 5296 } 5297 } 5298 } 5299 5300 bool 5301 Process::ProcessIOHandlerIsActive () 5302 { 5303 IOHandlerSP io_handler_sp (m_process_input_reader); 5304 if (io_handler_sp) 5305 return GetTarget().GetDebugger().IsTopIOHandler (io_handler_sp); 5306 return false; 5307 } 5308 bool 5309 Process::PushProcessIOHandler () 5310 { 5311 IOHandlerSP io_handler_sp (m_process_input_reader); 5312 if (io_handler_sp) 5313 { 5314 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5315 if (log) 5316 log->Printf("Process::%s pushing IO handler", __FUNCTION__); 5317 5318 io_handler_sp->SetIsDone(false); 5319 GetTarget().GetDebugger().PushIOHandler (io_handler_sp); 5320 return true; 5321 } 5322 return false; 5323 } 5324 5325 bool 5326 Process::PopProcessIOHandler () 5327 { 5328 IOHandlerSP io_handler_sp (m_process_input_reader); 5329 if (io_handler_sp) 5330 return GetTarget().GetDebugger().PopIOHandler (io_handler_sp); 5331 return false; 5332 } 5333 5334 // The process needs to know about installed plug-ins 5335 void 5336 Process::SettingsInitialize () 5337 { 5338 Thread::SettingsInitialize (); 5339 } 5340 5341 void 5342 Process::SettingsTerminate () 5343 { 5344 Thread::SettingsTerminate (); 5345 } 5346 5347 namespace 5348 { 5349 // RestorePlanState is used to record the "is private", "is master" and "okay to discard" fields of 5350 // the plan we are running, and reset it on Clean or on destruction. 5351 // It will only reset the state once, so you can call Clean and then monkey with the state and it 5352 // won't get reset on you again. 5353 5354 class RestorePlanState 5355 { 5356 public: 5357 RestorePlanState (lldb::ThreadPlanSP thread_plan_sp) : 5358 m_thread_plan_sp(thread_plan_sp), 5359 m_already_reset(false) 5360 { 5361 if (m_thread_plan_sp) 5362 { 5363 m_private = m_thread_plan_sp->GetPrivate(); 5364 m_is_master = m_thread_plan_sp->IsMasterPlan(); 5365 m_okay_to_discard = m_thread_plan_sp->OkayToDiscard(); 5366 } 5367 } 5368 5369 ~RestorePlanState() 5370 { 5371 Clean(); 5372 } 5373 5374 void 5375 Clean () 5376 { 5377 if (!m_already_reset && m_thread_plan_sp) 5378 { 5379 m_already_reset = true; 5380 m_thread_plan_sp->SetPrivate(m_private); 5381 m_thread_plan_sp->SetIsMasterPlan (m_is_master); 5382 m_thread_plan_sp->SetOkayToDiscard(m_okay_to_discard); 5383 } 5384 } 5385 5386 private: 5387 lldb::ThreadPlanSP m_thread_plan_sp; 5388 bool m_already_reset; 5389 bool m_private; 5390 bool m_is_master; 5391 bool m_okay_to_discard; 5392 }; 5393 } // anonymous namespace 5394 5395 ExpressionResults 5396 Process::RunThreadPlan (ExecutionContext &exe_ctx, 5397 lldb::ThreadPlanSP &thread_plan_sp, 5398 const EvaluateExpressionOptions &options, 5399 Stream &errors) 5400 { 5401 ExpressionResults return_value = eExpressionSetupError; 5402 5403 if (thread_plan_sp.get() == NULL) 5404 { 5405 errors.Printf("RunThreadPlan called with empty thread plan."); 5406 return eExpressionSetupError; 5407 } 5408 5409 if (!thread_plan_sp->ValidatePlan(NULL)) 5410 { 5411 errors.Printf ("RunThreadPlan called with an invalid thread plan."); 5412 return eExpressionSetupError; 5413 } 5414 5415 if (exe_ctx.GetProcessPtr() != this) 5416 { 5417 errors.Printf("RunThreadPlan called on wrong process."); 5418 return eExpressionSetupError; 5419 } 5420 5421 Thread *thread = exe_ctx.GetThreadPtr(); 5422 if (thread == NULL) 5423 { 5424 errors.Printf("RunThreadPlan called with invalid thread."); 5425 return eExpressionSetupError; 5426 } 5427 5428 // We need to change some of the thread plan attributes for the thread plan runner. This will restore them 5429 // when we are done: 5430 5431 RestorePlanState thread_plan_restorer(thread_plan_sp); 5432 5433 // We rely on the thread plan we are running returning "PlanCompleted" if when it successfully completes. 5434 // For that to be true the plan can't be private - since private plans suppress themselves in the 5435 // GetCompletedPlan call. 5436 5437 thread_plan_sp->SetPrivate(false); 5438 5439 // The plans run with RunThreadPlan also need to be terminal master plans or when they are done we will end 5440 // up asking the plan above us whether we should stop, which may give the wrong answer. 5441 5442 thread_plan_sp->SetIsMasterPlan (true); 5443 thread_plan_sp->SetOkayToDiscard(false); 5444 5445 if (m_private_state.GetValue() != eStateStopped) 5446 { 5447 errors.Printf ("RunThreadPlan called while the private state was not stopped."); 5448 return eExpressionSetupError; 5449 } 5450 5451 // Save the thread & frame from the exe_ctx for restoration after we run 5452 const uint32_t thread_idx_id = thread->GetIndexID(); 5453 StackFrameSP selected_frame_sp = thread->GetSelectedFrame(); 5454 if (!selected_frame_sp) 5455 { 5456 thread->SetSelectedFrame(0); 5457 selected_frame_sp = thread->GetSelectedFrame(); 5458 if (!selected_frame_sp) 5459 { 5460 errors.Printf("RunThreadPlan called without a selected frame on thread %d", thread_idx_id); 5461 return eExpressionSetupError; 5462 } 5463 } 5464 5465 StackID ctx_frame_id = selected_frame_sp->GetStackID(); 5466 5467 // N.B. Running the target may unset the currently selected thread and frame. We don't want to do that either, 5468 // so we should arrange to reset them as well. 5469 5470 lldb::ThreadSP selected_thread_sp = GetThreadList().GetSelectedThread(); 5471 5472 uint32_t selected_tid; 5473 StackID selected_stack_id; 5474 if (selected_thread_sp) 5475 { 5476 selected_tid = selected_thread_sp->GetIndexID(); 5477 selected_stack_id = selected_thread_sp->GetSelectedFrame()->GetStackID(); 5478 } 5479 else 5480 { 5481 selected_tid = LLDB_INVALID_THREAD_ID; 5482 } 5483 5484 HostThread backup_private_state_thread; 5485 lldb::StateType old_state = eStateInvalid; 5486 lldb::ThreadPlanSP stopper_base_plan_sp; 5487 5488 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 5489 if (m_private_state_thread.EqualsThread(Host::GetCurrentThread())) 5490 { 5491 // Yikes, we are running on the private state thread! So we can't wait for public events on this thread, since 5492 // we are the thread that is generating public events. 5493 // The simplest thing to do is to spin up a temporary thread to handle private state thread events while 5494 // we are fielding public events here. 5495 if (log) 5496 log->Printf ("Running thread plan on private state thread, spinning up another state thread to handle the events."); 5497 5498 backup_private_state_thread = m_private_state_thread; 5499 5500 // One other bit of business: we want to run just this thread plan and anything it pushes, and then stop, 5501 // returning control here. 5502 // But in the normal course of things, the plan above us on the stack would be given a shot at the stop 5503 // event before deciding to stop, and we don't want that. So we insert a "stopper" base plan on the stack 5504 // before the plan we want to run. Since base plans always stop and return control to the user, that will 5505 // do just what we want. 5506 stopper_base_plan_sp.reset(new ThreadPlanBase (*thread)); 5507 thread->QueueThreadPlan (stopper_base_plan_sp, false); 5508 // Have to make sure our public state is stopped, since otherwise the reporting logic below doesn't work correctly. 5509 old_state = m_public_state.GetValue(); 5510 m_public_state.SetValueNoLock(eStateStopped); 5511 5512 // Now spin up the private state thread: 5513 StartPrivateStateThread(true); 5514 } 5515 5516 thread->QueueThreadPlan(thread_plan_sp, false); // This used to pass "true" does that make sense? 5517 5518 if (options.GetDebug()) 5519 { 5520 // In this case, we aren't actually going to run, we just want to stop right away. 5521 // Flush this thread so we will refetch the stacks and show the correct backtrace. 5522 // FIXME: To make this prettier we should invent some stop reason for this, but that 5523 // is only cosmetic, and this functionality is only of use to lldb developers who can 5524 // live with not pretty... 5525 thread->Flush(); 5526 return eExpressionStoppedForDebug; 5527 } 5528 5529 Listener listener("lldb.process.listener.run-thread-plan"); 5530 5531 lldb::EventSP event_to_broadcast_sp; 5532 5533 { 5534 // This process event hijacker Hijacks the Public events and its destructor makes sure that the process events get 5535 // restored on exit to the function. 5536 // 5537 // If the event needs to propagate beyond the hijacker (e.g., the process exits during execution), then the event 5538 // is put into event_to_broadcast_sp for rebroadcasting. 5539 5540 ProcessEventHijacker run_thread_plan_hijacker (*this, &listener); 5541 5542 if (log) 5543 { 5544 StreamString s; 5545 thread_plan_sp->GetDescription(&s, lldb::eDescriptionLevelVerbose); 5546 log->Printf ("Process::RunThreadPlan(): Resuming thread %u - 0x%4.4" PRIx64 " to run thread plan \"%s\".", 5547 thread->GetIndexID(), 5548 thread->GetID(), 5549 s.GetData()); 5550 } 5551 5552 bool got_event; 5553 lldb::EventSP event_sp; 5554 lldb::StateType stop_state = lldb::eStateInvalid; 5555 5556 TimeValue* timeout_ptr = NULL; 5557 TimeValue real_timeout; 5558 5559 bool before_first_timeout = true; // This is set to false the first time that we have to halt the target. 5560 bool do_resume = true; 5561 bool handle_running_event = true; 5562 const uint64_t default_one_thread_timeout_usec = 250000; 5563 5564 // This is just for accounting: 5565 uint32_t num_resumes = 0; 5566 5567 uint32_t timeout_usec = options.GetTimeoutUsec(); 5568 uint32_t one_thread_timeout_usec; 5569 uint32_t all_threads_timeout_usec = 0; 5570 5571 // If we are going to run all threads the whole time, or if we are only going to run one thread, 5572 // then we don't need the first timeout. So we set the final timeout, and pretend we are after the 5573 // first timeout already. 5574 5575 if (!options.GetStopOthers() || !options.GetTryAllThreads()) 5576 { 5577 before_first_timeout = false; 5578 one_thread_timeout_usec = 0; 5579 all_threads_timeout_usec = timeout_usec; 5580 } 5581 else 5582 { 5583 uint32_t option_one_thread_timeout = options.GetOneThreadTimeoutUsec(); 5584 5585 // If the overall wait is forever, then we only need to set the one thread timeout: 5586 if (timeout_usec == 0) 5587 { 5588 if (option_one_thread_timeout != 0) 5589 one_thread_timeout_usec = option_one_thread_timeout; 5590 else 5591 one_thread_timeout_usec = default_one_thread_timeout_usec; 5592 } 5593 else 5594 { 5595 // Otherwise, if the one thread timeout is set, make sure it isn't longer than the overall timeout, 5596 // and use it, otherwise use half the total timeout, bounded by the default_one_thread_timeout_usec. 5597 uint64_t computed_one_thread_timeout; 5598 if (option_one_thread_timeout != 0) 5599 { 5600 if (timeout_usec < option_one_thread_timeout) 5601 { 5602 errors.Printf("RunThreadPlan called without one thread timeout greater than total timeout"); 5603 return eExpressionSetupError; 5604 } 5605 computed_one_thread_timeout = option_one_thread_timeout; 5606 } 5607 else 5608 { 5609 computed_one_thread_timeout = timeout_usec / 2; 5610 if (computed_one_thread_timeout > default_one_thread_timeout_usec) 5611 computed_one_thread_timeout = default_one_thread_timeout_usec; 5612 } 5613 one_thread_timeout_usec = computed_one_thread_timeout; 5614 all_threads_timeout_usec = timeout_usec - one_thread_timeout_usec; 5615 } 5616 } 5617 5618 if (log) 5619 log->Printf ("Stop others: %u, try all: %u, before_first: %u, one thread: %" PRIu32 " - all threads: %" PRIu32 ".\n", 5620 options.GetStopOthers(), 5621 options.GetTryAllThreads(), 5622 before_first_timeout, 5623 one_thread_timeout_usec, 5624 all_threads_timeout_usec); 5625 5626 // This isn't going to work if there are unfetched events on the queue. 5627 // Are there cases where we might want to run the remaining events here, and then try to 5628 // call the function? That's probably being too tricky for our own good. 5629 5630 Event *other_events = listener.PeekAtNextEvent(); 5631 if (other_events != NULL) 5632 { 5633 errors.Printf("Calling RunThreadPlan with pending events on the queue."); 5634 return eExpressionSetupError; 5635 } 5636 5637 // We also need to make sure that the next event is delivered. We might be calling a function as part of 5638 // a thread plan, in which case the last delivered event could be the running event, and we don't want 5639 // event coalescing to cause us to lose OUR running event... 5640 ForceNextEventDelivery(); 5641 5642 // This while loop must exit out the bottom, there's cleanup that we need to do when we are done. 5643 // So don't call return anywhere within it. 5644 5645 #ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT 5646 // It's pretty much impossible to write test cases for things like: 5647 // One thread timeout expires, I go to halt, but the process already stopped 5648 // on the function call stop breakpoint. Turning on this define will make us not 5649 // fetch the first event till after the halt. So if you run a quick function, it will have 5650 // completed, and the completion event will be waiting, when you interrupt for halt. 5651 // The expression evaluation should still succeed. 5652 bool miss_first_event = true; 5653 #endif 5654 TimeValue one_thread_timeout; 5655 TimeValue final_timeout; 5656 5657 while (1) 5658 { 5659 // We usually want to resume the process if we get to the top of the loop. 5660 // The only exception is if we get two running events with no intervening 5661 // stop, which can happen, we will just wait for then next stop event. 5662 if (log) 5663 log->Printf ("Top of while loop: do_resume: %i handle_running_event: %i before_first_timeout: %i.", 5664 do_resume, 5665 handle_running_event, 5666 before_first_timeout); 5667 5668 if (do_resume || handle_running_event) 5669 { 5670 // Do the initial resume and wait for the running event before going further. 5671 5672 if (do_resume) 5673 { 5674 num_resumes++; 5675 Error resume_error = PrivateResume (); 5676 if (!resume_error.Success()) 5677 { 5678 errors.Printf("Error resuming inferior the %d time: \"%s\".\n", 5679 num_resumes, 5680 resume_error.AsCString()); 5681 return_value = eExpressionSetupError; 5682 break; 5683 } 5684 } 5685 5686 TimeValue resume_timeout = TimeValue::Now(); 5687 resume_timeout.OffsetWithMicroSeconds(500000); 5688 5689 got_event = listener.WaitForEvent(&resume_timeout, event_sp); 5690 if (!got_event) 5691 { 5692 if (log) 5693 log->Printf ("Process::RunThreadPlan(): didn't get any event after resume %d, exiting.", 5694 num_resumes); 5695 5696 errors.Printf("Didn't get any event after resume %d, exiting.", num_resumes); 5697 return_value = eExpressionSetupError; 5698 break; 5699 } 5700 5701 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5702 5703 if (stop_state != eStateRunning) 5704 { 5705 bool restarted = false; 5706 5707 if (stop_state == eStateStopped) 5708 { 5709 restarted = Process::ProcessEventData::GetRestartedFromEvent(event_sp.get()); 5710 if (log) 5711 log->Printf("Process::RunThreadPlan(): didn't get running event after " 5712 "resume %d, got %s instead (restarted: %i, do_resume: %i, handle_running_event: %i).", 5713 num_resumes, 5714 StateAsCString(stop_state), 5715 restarted, 5716 do_resume, 5717 handle_running_event); 5718 } 5719 5720 if (restarted) 5721 { 5722 // This is probably an overabundance of caution, I don't think I should ever get a stopped & restarted 5723 // event here. But if I do, the best thing is to Halt and then get out of here. 5724 Halt(); 5725 } 5726 5727 errors.Printf("Didn't get running event after initial resume, got %s instead.", 5728 StateAsCString(stop_state)); 5729 return_value = eExpressionSetupError; 5730 break; 5731 } 5732 5733 if (log) 5734 log->PutCString ("Process::RunThreadPlan(): resuming succeeded."); 5735 // We need to call the function synchronously, so spin waiting for it to return. 5736 // If we get interrupted while executing, we're going to lose our context, and 5737 // won't be able to gather the result at this point. 5738 // We set the timeout AFTER the resume, since the resume takes some time and we 5739 // don't want to charge that to the timeout. 5740 } 5741 else 5742 { 5743 if (log) 5744 log->PutCString ("Process::RunThreadPlan(): waiting for next event."); 5745 } 5746 5747 if (before_first_timeout) 5748 { 5749 if (options.GetTryAllThreads()) 5750 { 5751 one_thread_timeout = TimeValue::Now(); 5752 one_thread_timeout.OffsetWithMicroSeconds(one_thread_timeout_usec); 5753 timeout_ptr = &one_thread_timeout; 5754 } 5755 else 5756 { 5757 if (timeout_usec == 0) 5758 timeout_ptr = NULL; 5759 else 5760 { 5761 final_timeout = TimeValue::Now(); 5762 final_timeout.OffsetWithMicroSeconds (timeout_usec); 5763 timeout_ptr = &final_timeout; 5764 } 5765 } 5766 } 5767 else 5768 { 5769 if (timeout_usec == 0) 5770 timeout_ptr = NULL; 5771 else 5772 { 5773 final_timeout = TimeValue::Now(); 5774 final_timeout.OffsetWithMicroSeconds (all_threads_timeout_usec); 5775 timeout_ptr = &final_timeout; 5776 } 5777 } 5778 5779 do_resume = true; 5780 handle_running_event = true; 5781 5782 // Now wait for the process to stop again: 5783 event_sp.reset(); 5784 5785 if (log) 5786 { 5787 if (timeout_ptr) 5788 { 5789 log->Printf ("Process::RunThreadPlan(): about to wait - now is %" PRIu64 " - endpoint is %" PRIu64, 5790 TimeValue::Now().GetAsMicroSecondsSinceJan1_1970(), 5791 timeout_ptr->GetAsMicroSecondsSinceJan1_1970()); 5792 } 5793 else 5794 { 5795 log->Printf ("Process::RunThreadPlan(): about to wait forever."); 5796 } 5797 } 5798 5799 #ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT 5800 // See comment above... 5801 if (miss_first_event) 5802 { 5803 usleep(1000); 5804 miss_first_event = false; 5805 got_event = false; 5806 } 5807 else 5808 #endif 5809 got_event = listener.WaitForEvent (timeout_ptr, event_sp); 5810 5811 if (got_event) 5812 { 5813 if (event_sp.get()) 5814 { 5815 bool keep_going = false; 5816 if (event_sp->GetType() == eBroadcastBitInterrupt) 5817 { 5818 Halt(); 5819 return_value = eExpressionInterrupted; 5820 errors.Printf ("Execution halted by user interrupt."); 5821 if (log) 5822 log->Printf ("Process::RunThreadPlan(): Got interrupted by eBroadcastBitInterrupted, exiting."); 5823 break; 5824 } 5825 else 5826 { 5827 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5828 if (log) 5829 log->Printf("Process::RunThreadPlan(): in while loop, got event: %s.", StateAsCString(stop_state)); 5830 5831 switch (stop_state) 5832 { 5833 case lldb::eStateStopped: 5834 { 5835 // We stopped, figure out what we are going to do now. 5836 ThreadSP thread_sp = GetThreadList().FindThreadByIndexID (thread_idx_id); 5837 if (!thread_sp) 5838 { 5839 // Ooh, our thread has vanished. Unlikely that this was successful execution... 5840 if (log) 5841 log->Printf ("Process::RunThreadPlan(): execution completed but our thread (index-id=%u) has vanished.", thread_idx_id); 5842 return_value = eExpressionInterrupted; 5843 } 5844 else 5845 { 5846 // If we were restarted, we just need to go back up to fetch another event. 5847 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5848 { 5849 if (log) 5850 { 5851 log->Printf ("Process::RunThreadPlan(): Got a stop and restart, so we'll continue waiting."); 5852 } 5853 keep_going = true; 5854 do_resume = false; 5855 handle_running_event = true; 5856 } 5857 else 5858 { 5859 StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 5860 StopReason stop_reason = eStopReasonInvalid; 5861 if (stop_info_sp) 5862 stop_reason = stop_info_sp->GetStopReason(); 5863 5864 // FIXME: We only check if the stop reason is plan complete, should we make sure that 5865 // it is OUR plan that is complete? 5866 if (stop_reason == eStopReasonPlanComplete) 5867 { 5868 if (log) 5869 log->PutCString ("Process::RunThreadPlan(): execution completed successfully."); 5870 5871 // Restore the plan state so it will get reported as intended when we are done. 5872 thread_plan_restorer.Clean(); 5873 5874 return_value = eExpressionCompleted; 5875 } 5876 else 5877 { 5878 // Something restarted the target, so just wait for it to stop for real. 5879 if (stop_reason == eStopReasonBreakpoint) 5880 { 5881 if (log) 5882 log->Printf ("Process::RunThreadPlan() stopped for breakpoint: %s.", stop_info_sp->GetDescription()); 5883 return_value = eExpressionHitBreakpoint; 5884 if (!options.DoesIgnoreBreakpoints()) 5885 { 5886 // Restore the plan state and then force Private to false. We are 5887 // going to stop because of this plan so we need it to become a public 5888 // plan or it won't report correctly when we continue to its termination 5889 // later on. 5890 thread_plan_restorer.Clean(); 5891 if (thread_plan_sp) 5892 thread_plan_sp->SetPrivate(false); 5893 event_to_broadcast_sp = event_sp; 5894 } 5895 } 5896 else 5897 { 5898 if (log) 5899 log->PutCString ("Process::RunThreadPlan(): thread plan didn't successfully complete."); 5900 if (!options.DoesUnwindOnError()) 5901 event_to_broadcast_sp = event_sp; 5902 return_value = eExpressionInterrupted; 5903 } 5904 } 5905 } 5906 } 5907 } 5908 break; 5909 5910 case lldb::eStateRunning: 5911 // This shouldn't really happen, but sometimes we do get two running events without an 5912 // intervening stop, and in that case we should just go back to waiting for the stop. 5913 do_resume = false; 5914 keep_going = true; 5915 handle_running_event = false; 5916 break; 5917 5918 default: 5919 if (log) 5920 log->Printf("Process::RunThreadPlan(): execution stopped with unexpected state: %s.", StateAsCString(stop_state)); 5921 5922 if (stop_state == eStateExited) 5923 event_to_broadcast_sp = event_sp; 5924 5925 errors.Printf ("Execution stopped with unexpected state.\n"); 5926 return_value = eExpressionInterrupted; 5927 break; 5928 } 5929 } 5930 5931 if (keep_going) 5932 continue; 5933 else 5934 break; 5935 } 5936 else 5937 { 5938 if (log) 5939 log->PutCString ("Process::RunThreadPlan(): got_event was true, but the event pointer was null. How odd..."); 5940 return_value = eExpressionInterrupted; 5941 break; 5942 } 5943 } 5944 else 5945 { 5946 // If we didn't get an event that means we've timed out... 5947 // We will interrupt the process here. Depending on what we were asked to do we will 5948 // either exit, or try with all threads running for the same timeout. 5949 5950 if (log) { 5951 if (options.GetTryAllThreads()) 5952 { 5953 if (before_first_timeout) 5954 { 5955 if (timeout_usec != 0) 5956 { 5957 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5958 "running for %" PRIu32 " usec with all threads enabled.", 5959 all_threads_timeout_usec); 5960 } 5961 else 5962 { 5963 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5964 "running forever with all threads enabled."); 5965 } 5966 } 5967 else 5968 log->Printf ("Process::RunThreadPlan(): Restarting function with all threads enabled " 5969 "and timeout: %u timed out, abandoning execution.", 5970 timeout_usec); 5971 } 5972 else 5973 log->Printf ("Process::RunThreadPlan(): Running function with timeout: %u timed out, " 5974 "abandoning execution.", 5975 timeout_usec); 5976 } 5977 5978 // It is possible that between the time we issued the Halt, and we get around to calling Halt the target 5979 // could have stopped. That's fine, Halt will figure that out and send the appropriate Stopped event. 5980 // BUT it is also possible that we stopped & restarted (e.g. hit a signal with "stop" set to false.) In 5981 // that case, we'll get the stopped & restarted event, and we should go back to waiting for the Halt's 5982 // stopped event. That's what this while loop does. 5983 5984 bool back_to_top = true; 5985 uint32_t try_halt_again = 0; 5986 bool do_halt = true; 5987 const uint32_t num_retries = 5; 5988 while (try_halt_again < num_retries) 5989 { 5990 Error halt_error; 5991 if (do_halt) 5992 { 5993 if (log) 5994 log->Printf ("Process::RunThreadPlan(): Running Halt."); 5995 halt_error = Halt(); 5996 } 5997 if (halt_error.Success()) 5998 { 5999 if (log) 6000 log->PutCString ("Process::RunThreadPlan(): Halt succeeded."); 6001 6002 real_timeout = TimeValue::Now(); 6003 real_timeout.OffsetWithMicroSeconds(500000); 6004 6005 got_event = listener.WaitForEvent(&real_timeout, event_sp); 6006 6007 if (got_event) 6008 { 6009 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 6010 if (log) 6011 { 6012 log->Printf ("Process::RunThreadPlan(): Stopped with event: %s", StateAsCString(stop_state)); 6013 if (stop_state == lldb::eStateStopped 6014 && Process::ProcessEventData::GetInterruptedFromEvent(event_sp.get())) 6015 log->PutCString (" Event was the Halt interruption event."); 6016 } 6017 6018 if (stop_state == lldb::eStateStopped) 6019 { 6020 // Between the time we initiated the Halt and the time we delivered it, the process could have 6021 // already finished its job. Check that here: 6022 6023 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 6024 { 6025 if (log) 6026 log->PutCString ("Process::RunThreadPlan(): Even though we timed out, the call plan was done. " 6027 "Exiting wait loop."); 6028 return_value = eExpressionCompleted; 6029 back_to_top = false; 6030 break; 6031 } 6032 6033 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 6034 { 6035 if (log) 6036 log->PutCString ("Process::RunThreadPlan(): Went to halt but got a restarted event, there must be an un-restarted stopped event so try again... " 6037 "Exiting wait loop."); 6038 try_halt_again++; 6039 do_halt = false; 6040 continue; 6041 } 6042 6043 if (!options.GetTryAllThreads()) 6044 { 6045 if (log) 6046 log->PutCString ("Process::RunThreadPlan(): try_all_threads was false, we stopped so now we're quitting."); 6047 return_value = eExpressionInterrupted; 6048 back_to_top = false; 6049 break; 6050 } 6051 6052 if (before_first_timeout) 6053 { 6054 // Set all the other threads to run, and return to the top of the loop, which will continue; 6055 before_first_timeout = false; 6056 thread_plan_sp->SetStopOthers (false); 6057 if (log) 6058 log->PutCString ("Process::RunThreadPlan(): about to resume."); 6059 6060 back_to_top = true; 6061 break; 6062 } 6063 else 6064 { 6065 // Running all threads failed, so return Interrupted. 6066 if (log) 6067 log->PutCString("Process::RunThreadPlan(): running all threads timed out."); 6068 return_value = eExpressionInterrupted; 6069 back_to_top = false; 6070 break; 6071 } 6072 } 6073 } 6074 else 6075 { if (log) 6076 log->PutCString("Process::RunThreadPlan(): halt said it succeeded, but I got no event. " 6077 "I'm getting out of here passing Interrupted."); 6078 return_value = eExpressionInterrupted; 6079 back_to_top = false; 6080 break; 6081 } 6082 } 6083 else 6084 { 6085 try_halt_again++; 6086 continue; 6087 } 6088 } 6089 6090 if (!back_to_top || try_halt_again > num_retries) 6091 break; 6092 else 6093 continue; 6094 } 6095 } // END WAIT LOOP 6096 6097 // If we had to start up a temporary private state thread to run this thread plan, shut it down now. 6098 if (backup_private_state_thread.IsJoinable()) 6099 { 6100 StopPrivateStateThread(); 6101 Error error; 6102 m_private_state_thread = backup_private_state_thread; 6103 if (stopper_base_plan_sp) 6104 { 6105 thread->DiscardThreadPlansUpToPlan(stopper_base_plan_sp); 6106 } 6107 if (old_state != eStateInvalid) 6108 m_public_state.SetValueNoLock(old_state); 6109 } 6110 6111 if (return_value != eExpressionCompleted && log) 6112 { 6113 // Print a backtrace into the log so we can figure out where we are: 6114 StreamString s; 6115 s.PutCString("Thread state after unsuccessful completion: \n"); 6116 thread->GetStackFrameStatus (s, 6117 0, 6118 UINT32_MAX, 6119 true, 6120 UINT32_MAX); 6121 log->PutCString(s.GetData()); 6122 6123 } 6124 // Restore the thread state if we are going to discard the plan execution. There are three cases where this 6125 // could happen: 6126 // 1) The execution successfully completed 6127 // 2) We hit a breakpoint, and ignore_breakpoints was true 6128 // 3) We got some other error, and discard_on_error was true 6129 bool should_unwind = (return_value == eExpressionInterrupted && options.DoesUnwindOnError()) 6130 || (return_value == eExpressionHitBreakpoint && options.DoesIgnoreBreakpoints()); 6131 6132 if (return_value == eExpressionCompleted 6133 || should_unwind) 6134 { 6135 thread_plan_sp->RestoreThreadState(); 6136 } 6137 6138 // Now do some processing on the results of the run: 6139 if (return_value == eExpressionInterrupted || return_value == eExpressionHitBreakpoint) 6140 { 6141 if (log) 6142 { 6143 StreamString s; 6144 if (event_sp) 6145 event_sp->Dump (&s); 6146 else 6147 { 6148 log->PutCString ("Process::RunThreadPlan(): Stop event that interrupted us is NULL."); 6149 } 6150 6151 StreamString ts; 6152 6153 const char *event_explanation = NULL; 6154 6155 do 6156 { 6157 if (!event_sp) 6158 { 6159 event_explanation = "<no event>"; 6160 break; 6161 } 6162 else if (event_sp->GetType() == eBroadcastBitInterrupt) 6163 { 6164 event_explanation = "<user interrupt>"; 6165 break; 6166 } 6167 else 6168 { 6169 const Process::ProcessEventData *event_data = Process::ProcessEventData::GetEventDataFromEvent (event_sp.get()); 6170 6171 if (!event_data) 6172 { 6173 event_explanation = "<no event data>"; 6174 break; 6175 } 6176 6177 Process *process = event_data->GetProcessSP().get(); 6178 6179 if (!process) 6180 { 6181 event_explanation = "<no process>"; 6182 break; 6183 } 6184 6185 ThreadList &thread_list = process->GetThreadList(); 6186 6187 uint32_t num_threads = thread_list.GetSize(); 6188 uint32_t thread_index; 6189 6190 ts.Printf("<%u threads> ", num_threads); 6191 6192 for (thread_index = 0; 6193 thread_index < num_threads; 6194 ++thread_index) 6195 { 6196 Thread *thread = thread_list.GetThreadAtIndex(thread_index).get(); 6197 6198 if (!thread) 6199 { 6200 ts.Printf("<?> "); 6201 continue; 6202 } 6203 6204 ts.Printf("<0x%4.4" PRIx64 " ", thread->GetID()); 6205 RegisterContext *register_context = thread->GetRegisterContext().get(); 6206 6207 if (register_context) 6208 ts.Printf("[ip 0x%" PRIx64 "] ", register_context->GetPC()); 6209 else 6210 ts.Printf("[ip unknown] "); 6211 6212 // Show the private stop info here, the public stop info will be from the last natural stop. 6213 lldb::StopInfoSP stop_info_sp = thread->GetPrivateStopInfo(); 6214 if (stop_info_sp) 6215 { 6216 const char *stop_desc = stop_info_sp->GetDescription(); 6217 if (stop_desc) 6218 ts.PutCString (stop_desc); 6219 } 6220 ts.Printf(">"); 6221 } 6222 6223 event_explanation = ts.GetData(); 6224 } 6225 } while (0); 6226 6227 if (event_explanation) 6228 log->Printf("Process::RunThreadPlan(): execution interrupted: %s %s", s.GetData(), event_explanation); 6229 else 6230 log->Printf("Process::RunThreadPlan(): execution interrupted: %s", s.GetData()); 6231 } 6232 6233 if (should_unwind) 6234 { 6235 if (log) 6236 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - discarding thread plans up to %p.", 6237 static_cast<void*>(thread_plan_sp.get())); 6238 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6239 } 6240 else 6241 { 6242 if (log) 6243 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - for plan: %p not discarding.", 6244 static_cast<void*>(thread_plan_sp.get())); 6245 } 6246 } 6247 else if (return_value == eExpressionSetupError) 6248 { 6249 if (log) 6250 log->PutCString("Process::RunThreadPlan(): execution set up error."); 6251 6252 if (options.DoesUnwindOnError()) 6253 { 6254 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6255 } 6256 } 6257 else 6258 { 6259 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 6260 { 6261 if (log) 6262 log->PutCString("Process::RunThreadPlan(): thread plan is done"); 6263 return_value = eExpressionCompleted; 6264 } 6265 else if (thread->WasThreadPlanDiscarded (thread_plan_sp.get())) 6266 { 6267 if (log) 6268 log->PutCString("Process::RunThreadPlan(): thread plan was discarded"); 6269 return_value = eExpressionDiscarded; 6270 } 6271 else 6272 { 6273 if (log) 6274 log->PutCString("Process::RunThreadPlan(): thread plan stopped in mid course"); 6275 if (options.DoesUnwindOnError() && thread_plan_sp) 6276 { 6277 if (log) 6278 log->PutCString("Process::RunThreadPlan(): discarding thread plan 'cause unwind_on_error is set."); 6279 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6280 } 6281 } 6282 } 6283 6284 // Thread we ran the function in may have gone away because we ran the target 6285 // Check that it's still there, and if it is put it back in the context. Also restore the 6286 // frame in the context if it is still present. 6287 thread = GetThreadList().FindThreadByIndexID(thread_idx_id, true).get(); 6288 if (thread) 6289 { 6290 exe_ctx.SetFrameSP (thread->GetFrameWithStackID (ctx_frame_id)); 6291 } 6292 6293 // Also restore the current process'es selected frame & thread, since this function calling may 6294 // be done behind the user's back. 6295 6296 if (selected_tid != LLDB_INVALID_THREAD_ID) 6297 { 6298 if (GetThreadList().SetSelectedThreadByIndexID (selected_tid) && selected_stack_id.IsValid()) 6299 { 6300 // We were able to restore the selected thread, now restore the frame: 6301 Mutex::Locker lock(GetThreadList().GetMutex()); 6302 StackFrameSP old_frame_sp = GetThreadList().GetSelectedThread()->GetFrameWithStackID(selected_stack_id); 6303 if (old_frame_sp) 6304 GetThreadList().GetSelectedThread()->SetSelectedFrame(old_frame_sp.get()); 6305 } 6306 } 6307 } 6308 6309 // If the process exited during the run of the thread plan, notify everyone. 6310 6311 if (event_to_broadcast_sp) 6312 { 6313 if (log) 6314 log->PutCString("Process::RunThreadPlan(): rebroadcasting event."); 6315 BroadcastEvent(event_to_broadcast_sp); 6316 } 6317 6318 return return_value; 6319 } 6320 6321 const char * 6322 Process::ExecutionResultAsCString (ExpressionResults result) 6323 { 6324 const char *result_name; 6325 6326 switch (result) 6327 { 6328 case eExpressionCompleted: 6329 result_name = "eExpressionCompleted"; 6330 break; 6331 case eExpressionDiscarded: 6332 result_name = "eExpressionDiscarded"; 6333 break; 6334 case eExpressionInterrupted: 6335 result_name = "eExpressionInterrupted"; 6336 break; 6337 case eExpressionHitBreakpoint: 6338 result_name = "eExpressionHitBreakpoint"; 6339 break; 6340 case eExpressionSetupError: 6341 result_name = "eExpressionSetupError"; 6342 break; 6343 case eExpressionParseError: 6344 result_name = "eExpressionParseError"; 6345 break; 6346 case eExpressionResultUnavailable: 6347 result_name = "eExpressionResultUnavailable"; 6348 break; 6349 case eExpressionTimedOut: 6350 result_name = "eExpressionTimedOut"; 6351 break; 6352 case eExpressionStoppedForDebug: 6353 result_name = "eExpressionStoppedForDebug"; 6354 break; 6355 } 6356 return result_name; 6357 } 6358 6359 void 6360 Process::GetStatus (Stream &strm) 6361 { 6362 const StateType state = GetState(); 6363 if (StateIsStoppedState(state, false)) 6364 { 6365 if (state == eStateExited) 6366 { 6367 int exit_status = GetExitStatus(); 6368 const char *exit_description = GetExitDescription(); 6369 strm.Printf ("Process %" PRIu64 " exited with status = %i (0x%8.8x) %s\n", 6370 GetID(), 6371 exit_status, 6372 exit_status, 6373 exit_description ? exit_description : ""); 6374 } 6375 else 6376 { 6377 if (state == eStateConnected) 6378 strm.Printf ("Connected to remote target.\n"); 6379 else 6380 strm.Printf ("Process %" PRIu64 " %s\n", GetID(), StateAsCString (state)); 6381 } 6382 } 6383 else 6384 { 6385 strm.Printf ("Process %" PRIu64 " is running.\n", GetID()); 6386 } 6387 } 6388 6389 size_t 6390 Process::GetThreadStatus (Stream &strm, 6391 bool only_threads_with_stop_reason, 6392 uint32_t start_frame, 6393 uint32_t num_frames, 6394 uint32_t num_frames_with_source) 6395 { 6396 size_t num_thread_infos_dumped = 0; 6397 6398 // You can't hold the thread list lock while calling Thread::GetStatus. That very well might run code (e.g. if we need it 6399 // to get return values or arguments.) For that to work the process has to be able to acquire it. So instead copy the thread 6400 // ID's, and look them up one by one: 6401 6402 uint32_t num_threads; 6403 std::vector<lldb::tid_t> thread_id_array; 6404 //Scope for thread list locker; 6405 { 6406 Mutex::Locker locker (GetThreadList().GetMutex()); 6407 ThreadList &curr_thread_list = GetThreadList(); 6408 num_threads = curr_thread_list.GetSize(); 6409 uint32_t idx; 6410 thread_id_array.resize(num_threads); 6411 for (idx = 0; idx < num_threads; ++idx) 6412 thread_id_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetID(); 6413 } 6414 6415 for (uint32_t i = 0; i < num_threads; i++) 6416 { 6417 ThreadSP thread_sp(GetThreadList().FindThreadByID(thread_id_array[i])); 6418 if (thread_sp) 6419 { 6420 if (only_threads_with_stop_reason) 6421 { 6422 StopInfoSP stop_info_sp = thread_sp->GetStopInfo(); 6423 if (stop_info_sp.get() == NULL || !stop_info_sp->IsValid()) 6424 continue; 6425 } 6426 thread_sp->GetStatus (strm, 6427 start_frame, 6428 num_frames, 6429 num_frames_with_source); 6430 ++num_thread_infos_dumped; 6431 } 6432 else 6433 { 6434 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 6435 if (log) 6436 log->Printf("Process::GetThreadStatus - thread 0x" PRIu64 " vanished while running Thread::GetStatus."); 6437 } 6438 } 6439 return num_thread_infos_dumped; 6440 } 6441 6442 void 6443 Process::AddInvalidMemoryRegion (const LoadRange ®ion) 6444 { 6445 m_memory_cache.AddInvalidRange(region.GetRangeBase(), region.GetByteSize()); 6446 } 6447 6448 bool 6449 Process::RemoveInvalidMemoryRange (const LoadRange ®ion) 6450 { 6451 return m_memory_cache.RemoveInvalidRange(region.GetRangeBase(), region.GetByteSize()); 6452 } 6453 6454 void 6455 Process::AddPreResumeAction (PreResumeActionCallback callback, void *baton) 6456 { 6457 m_pre_resume_actions.push_back(PreResumeCallbackAndBaton (callback, baton)); 6458 } 6459 6460 bool 6461 Process::RunPreResumeActions () 6462 { 6463 bool result = true; 6464 while (!m_pre_resume_actions.empty()) 6465 { 6466 struct PreResumeCallbackAndBaton action = m_pre_resume_actions.back(); 6467 m_pre_resume_actions.pop_back(); 6468 bool this_result = action.callback (action.baton); 6469 if (result == true) 6470 result = this_result; 6471 } 6472 return result; 6473 } 6474 6475 void 6476 Process::ClearPreResumeActions () 6477 { 6478 m_pre_resume_actions.clear(); 6479 } 6480 6481 ProcessRunLock & 6482 Process::GetRunLock() 6483 { 6484 if (m_private_state_thread.EqualsThread(Host::GetCurrentThread())) 6485 return m_private_run_lock; 6486 else 6487 return m_public_run_lock; 6488 } 6489 6490 void 6491 Process::Flush () 6492 { 6493 m_thread_list.Flush(); 6494 m_extended_thread_list.Flush(); 6495 m_extended_thread_stop_id = 0; 6496 m_queue_list.Clear(); 6497 m_queue_list_stop_id = 0; 6498 } 6499 6500 void 6501 Process::DidExec () 6502 { 6503 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 6504 if (log) 6505 log->Printf ("Process::%s()", __FUNCTION__); 6506 6507 Target &target = GetTarget(); 6508 target.CleanupProcess (); 6509 target.ClearModules(false); 6510 m_dynamic_checkers_ap.reset(); 6511 m_abi_sp.reset(); 6512 m_system_runtime_ap.reset(); 6513 m_os_ap.reset(); 6514 m_dyld_ap.reset(); 6515 m_jit_loaders_ap.reset(); 6516 m_image_tokens.clear(); 6517 m_allocated_memory_cache.Clear(); 6518 m_language_runtimes.clear(); 6519 m_instrumentation_runtimes.clear(); 6520 m_thread_list.DiscardThreadPlans(); 6521 m_memory_cache.Clear(true); 6522 m_stop_info_override_callback = NULL; 6523 DoDidExec(); 6524 CompleteAttach (); 6525 // Flush the process (threads and all stack frames) after running CompleteAttach() 6526 // in case the dynamic loader loaded things in new locations. 6527 Flush(); 6528 6529 // After we figure out what was loaded/unloaded in CompleteAttach, 6530 // we need to let the target know so it can do any cleanup it needs to. 6531 target.DidExec(); 6532 } 6533 6534 addr_t 6535 Process::ResolveIndirectFunction(const Address *address, Error &error) 6536 { 6537 if (address == nullptr) 6538 { 6539 error.SetErrorString("Invalid address argument"); 6540 return LLDB_INVALID_ADDRESS; 6541 } 6542 6543 addr_t function_addr = LLDB_INVALID_ADDRESS; 6544 6545 addr_t addr = address->GetLoadAddress(&GetTarget()); 6546 std::map<addr_t,addr_t>::const_iterator iter = m_resolved_indirect_addresses.find(addr); 6547 if (iter != m_resolved_indirect_addresses.end()) 6548 { 6549 function_addr = (*iter).second; 6550 } 6551 else 6552 { 6553 if (!InferiorCall(this, address, function_addr)) 6554 { 6555 Symbol *symbol = address->CalculateSymbolContextSymbol(); 6556 error.SetErrorStringWithFormat ("Unable to call resolver for indirect function %s", 6557 symbol ? symbol->GetName().AsCString() : "<UNKNOWN>"); 6558 function_addr = LLDB_INVALID_ADDRESS; 6559 } 6560 else 6561 { 6562 m_resolved_indirect_addresses.insert(std::pair<addr_t, addr_t>(addr, function_addr)); 6563 } 6564 } 6565 return function_addr; 6566 } 6567 6568 void 6569 Process::ModulesDidLoad (ModuleList &module_list) 6570 { 6571 SystemRuntime *sys_runtime = GetSystemRuntime(); 6572 if (sys_runtime) 6573 { 6574 sys_runtime->ModulesDidLoad (module_list); 6575 } 6576 6577 GetJITLoaders().ModulesDidLoad (module_list); 6578 6579 // Give runtimes a chance to be created. 6580 InstrumentationRuntime::ModulesDidLoad(module_list, this, m_instrumentation_runtimes); 6581 6582 // Tell runtimes about new modules. 6583 for (auto pos = m_instrumentation_runtimes.begin(); pos != m_instrumentation_runtimes.end(); ++pos) 6584 { 6585 InstrumentationRuntimeSP runtime = pos->second; 6586 runtime->ModulesDidLoad(module_list); 6587 } 6588 6589 // Let any language runtimes we have already created know 6590 // about the modules that loaded. 6591 6592 // Iterate over a copy of this language runtime list in case 6593 // the language runtime ModulesDidLoad somehow causes the language 6594 // riuntime to be unloaded. 6595 LanguageRuntimeCollection language_runtimes(m_language_runtimes); 6596 for (const auto &pair: language_runtimes) 6597 { 6598 // We must check language_runtime_sp to make sure it is not 6599 // NULL as we might cache the fact that we didn't have a 6600 // language runtime for a language. 6601 LanguageRuntimeSP language_runtime_sp = pair.second; 6602 if (language_runtime_sp) 6603 language_runtime_sp->ModulesDidLoad(module_list); 6604 } 6605 6606 LoadOperatingSystemPlugin(false); 6607 } 6608 6609 void 6610 Process::PrintWarning (uint64_t warning_type, void *repeat_key, const char *fmt, ...) 6611 { 6612 bool print_warning = true; 6613 6614 StreamSP stream_sp = GetTarget().GetDebugger().GetAsyncOutputStream(); 6615 if (stream_sp.get() == nullptr) 6616 return; 6617 if (warning_type == eWarningsOptimization 6618 && GetWarningsOptimization() == false) 6619 { 6620 return; 6621 } 6622 6623 if (repeat_key != nullptr) 6624 { 6625 WarningsCollection::iterator it = m_warnings_issued.find (warning_type); 6626 if (it == m_warnings_issued.end()) 6627 { 6628 m_warnings_issued[warning_type] = WarningsPointerSet(); 6629 m_warnings_issued[warning_type].insert (repeat_key); 6630 } 6631 else 6632 { 6633 if (it->second.find (repeat_key) != it->second.end()) 6634 { 6635 print_warning = false; 6636 } 6637 else 6638 { 6639 it->second.insert (repeat_key); 6640 } 6641 } 6642 } 6643 6644 if (print_warning) 6645 { 6646 va_list args; 6647 va_start (args, fmt); 6648 stream_sp->PrintfVarArg (fmt, args); 6649 va_end (args); 6650 } 6651 } 6652 6653 void 6654 Process::PrintWarningOptimization (const SymbolContext &sc) 6655 { 6656 if (GetWarningsOptimization() == true 6657 && sc.module_sp.get() 6658 && sc.module_sp->GetFileSpec().GetFilename().IsEmpty() == false 6659 && sc.function 6660 && sc.function->GetIsOptimized() == true) 6661 { 6662 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()); 6663 } 6664 } 6665 6666 ThreadCollectionSP 6667 Process::GetHistoryThreads(lldb::addr_t addr) 6668 { 6669 ThreadCollectionSP threads; 6670 6671 const MemoryHistorySP &memory_history = MemoryHistory::FindPlugin(shared_from_this()); 6672 6673 if (! memory_history.get()) { 6674 return threads; 6675 } 6676 6677 threads.reset(new ThreadCollection(memory_history->GetHistoryThreads(addr))); 6678 6679 return threads; 6680 } 6681 6682 InstrumentationRuntimeSP 6683 Process::GetInstrumentationRuntime(lldb::InstrumentationRuntimeType type) 6684 { 6685 InstrumentationRuntimeCollection::iterator pos; 6686 pos = m_instrumentation_runtimes.find (type); 6687 if (pos == m_instrumentation_runtimes.end()) 6688 { 6689 return InstrumentationRuntimeSP(); 6690 } 6691 else 6692 return (*pos).second; 6693 } 6694 6695 bool 6696 Process::GetModuleSpec(const FileSpec& module_file_spec, 6697 const ArchSpec& arch, 6698 ModuleSpec& module_spec) 6699 { 6700 module_spec.Clear(); 6701 return false; 6702 } 6703