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 bool 1505 Process::IsAlive () 1506 { 1507 switch (m_private_state.GetValue()) 1508 { 1509 case eStateInvalid: 1510 case eStateUnloaded: 1511 case eStateDetached: 1512 case eStateExited: 1513 return false; 1514 1515 case eStateConnected: 1516 case eStateAttaching: 1517 case eStateLaunching: 1518 case eStateStopped: 1519 case eStateRunning: 1520 case eStateStepping: 1521 case eStateCrashed: 1522 case eStateSuspended: 1523 return true; 1524 } 1525 } 1526 1527 // This static callback can be used to watch for local child processes on 1528 // the current host. The child process exits, the process will be 1529 // found in the global target list (we want to be completely sure that the 1530 // lldb_private::Process doesn't go away before we can deliver the signal. 1531 bool 1532 Process::SetProcessExitStatus (void *callback_baton, 1533 lldb::pid_t pid, 1534 bool exited, 1535 int signo, // Zero for no signal 1536 int exit_status // Exit value of process if signal is zero 1537 ) 1538 { 1539 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 1540 if (log) 1541 log->Printf ("Process::SetProcessExitStatus (baton=%p, pid=%" PRIu64 ", exited=%i, signal=%i, exit_status=%i)\n", 1542 callback_baton, 1543 pid, 1544 exited, 1545 signo, 1546 exit_status); 1547 1548 if (exited) 1549 { 1550 TargetSP target_sp(Debugger::FindTargetWithProcessID (pid)); 1551 if (target_sp) 1552 { 1553 ProcessSP process_sp (target_sp->GetProcessSP()); 1554 if (process_sp) 1555 { 1556 const char *signal_cstr = NULL; 1557 if (signo) 1558 signal_cstr = process_sp->GetUnixSignals()->GetSignalAsCString(signo); 1559 1560 process_sp->SetExitStatus (exit_status, signal_cstr); 1561 } 1562 } 1563 return true; 1564 } 1565 return false; 1566 } 1567 1568 void 1569 Process::UpdateThreadListIfNeeded () 1570 { 1571 const uint32_t stop_id = GetStopID(); 1572 if (m_thread_list.GetSize(false) == 0 || stop_id != m_thread_list.GetStopID()) 1573 { 1574 const StateType state = GetPrivateState(); 1575 if (StateIsStoppedState (state, true)) 1576 { 1577 Mutex::Locker locker (m_thread_list.GetMutex ()); 1578 // m_thread_list does have its own mutex, but we need to 1579 // hold onto the mutex between the call to UpdateThreadList(...) 1580 // and the os->UpdateThreadList(...) so it doesn't change on us 1581 ThreadList &old_thread_list = m_thread_list; 1582 ThreadList real_thread_list(this); 1583 ThreadList new_thread_list(this); 1584 // Always update the thread list with the protocol specific 1585 // thread list, but only update if "true" is returned 1586 if (UpdateThreadList (m_thread_list_real, real_thread_list)) 1587 { 1588 // Don't call into the OperatingSystem to update the thread list if we are shutting down, since 1589 // that may call back into the SBAPI's, requiring the API lock which is already held by whoever is 1590 // shutting us down, causing a deadlock. 1591 OperatingSystem *os = GetOperatingSystem (); 1592 if (os && !m_destroy_in_process) 1593 { 1594 // Clear any old backing threads where memory threads might have been 1595 // backed by actual threads from the lldb_private::Process subclass 1596 size_t num_old_threads = old_thread_list.GetSize(false); 1597 for (size_t i=0; i<num_old_threads; ++i) 1598 old_thread_list.GetThreadAtIndex(i, false)->ClearBackingThread(); 1599 1600 // Turn off dynamic types to ensure we don't run any expressions. Objective C 1601 // can run an expression to determine if a SBValue is a dynamic type or not 1602 // and we need to avoid this. OperatingSystem plug-ins can't run expressions 1603 // that require running code... 1604 1605 Target &target = GetTarget(); 1606 const lldb::DynamicValueType saved_prefer_dynamic = target.GetPreferDynamicValue (); 1607 if (saved_prefer_dynamic != lldb::eNoDynamicValues) 1608 target.SetPreferDynamicValue(lldb::eNoDynamicValues); 1609 1610 // Now let the OperatingSystem plug-in update the thread list 1611 1612 os->UpdateThreadList (old_thread_list, // Old list full of threads created by OS plug-in 1613 real_thread_list, // The actual thread list full of threads created by each lldb_private::Process subclass 1614 new_thread_list); // The new thread list that we will show to the user that gets filled in 1615 1616 if (saved_prefer_dynamic != lldb::eNoDynamicValues) 1617 target.SetPreferDynamicValue(saved_prefer_dynamic); 1618 } 1619 else 1620 { 1621 // No OS plug-in, the new thread list is the same as the real thread list 1622 new_thread_list = real_thread_list; 1623 } 1624 1625 m_thread_list_real.Update(real_thread_list); 1626 m_thread_list.Update (new_thread_list); 1627 m_thread_list.SetStopID (stop_id); 1628 1629 if (GetLastNaturalStopID () != m_extended_thread_stop_id) 1630 { 1631 // Clear any extended threads that we may have accumulated previously 1632 m_extended_thread_list.Clear(); 1633 m_extended_thread_stop_id = GetLastNaturalStopID (); 1634 1635 m_queue_list.Clear(); 1636 m_queue_list_stop_id = GetLastNaturalStopID (); 1637 } 1638 } 1639 } 1640 } 1641 } 1642 1643 void 1644 Process::UpdateQueueListIfNeeded () 1645 { 1646 if (m_system_runtime_ap.get()) 1647 { 1648 if (m_queue_list.GetSize() == 0 || m_queue_list_stop_id != GetLastNaturalStopID()) 1649 { 1650 const StateType state = GetPrivateState(); 1651 if (StateIsStoppedState (state, true)) 1652 { 1653 m_system_runtime_ap->PopulateQueueList (m_queue_list); 1654 m_queue_list_stop_id = GetLastNaturalStopID(); 1655 } 1656 } 1657 } 1658 } 1659 1660 ThreadSP 1661 Process::CreateOSPluginThread (lldb::tid_t tid, lldb::addr_t context) 1662 { 1663 OperatingSystem *os = GetOperatingSystem (); 1664 if (os) 1665 return os->CreateThread(tid, context); 1666 return ThreadSP(); 1667 } 1668 1669 uint32_t 1670 Process::GetNextThreadIndexID (uint64_t thread_id) 1671 { 1672 return AssignIndexIDToThread(thread_id); 1673 } 1674 1675 bool 1676 Process::HasAssignedIndexIDToThread(uint64_t thread_id) 1677 { 1678 return (m_thread_id_to_index_id_map.find(thread_id) != m_thread_id_to_index_id_map.end()); 1679 } 1680 1681 uint32_t 1682 Process::AssignIndexIDToThread(uint64_t thread_id) 1683 { 1684 uint32_t result = 0; 1685 std::map<uint64_t, uint32_t>::iterator iterator = m_thread_id_to_index_id_map.find(thread_id); 1686 if (iterator == m_thread_id_to_index_id_map.end()) 1687 { 1688 result = ++m_thread_index_id; 1689 m_thread_id_to_index_id_map[thread_id] = result; 1690 } 1691 else 1692 { 1693 result = iterator->second; 1694 } 1695 1696 return result; 1697 } 1698 1699 StateType 1700 Process::GetState() 1701 { 1702 // If any other threads access this we will need a mutex for it 1703 return m_public_state.GetValue (); 1704 } 1705 1706 bool 1707 Process::StateChangedIsExternallyHijacked() 1708 { 1709 if (IsHijackedForEvent(eBroadcastBitStateChanged)) 1710 { 1711 if (strcmp(m_hijacking_listeners.back()->GetName(), "lldb.Process.ResumeSynchronous.hijack")) 1712 return true; 1713 } 1714 return false; 1715 } 1716 1717 void 1718 Process::SetPublicState (StateType new_state, bool restarted) 1719 { 1720 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1721 if (log) 1722 log->Printf("Process::SetPublicState (state = %s, restarted = %i)", StateAsCString(new_state), restarted); 1723 const StateType old_state = m_public_state.GetValue(); 1724 m_public_state.SetValue (new_state); 1725 1726 // On the transition from Run to Stopped, we unlock the writer end of the 1727 // run lock. The lock gets locked in Resume, which is the public API 1728 // to tell the program to run. 1729 if (!StateChangedIsExternallyHijacked()) 1730 { 1731 if (new_state == eStateDetached) 1732 { 1733 if (log) 1734 log->Printf("Process::SetPublicState (%s) -- unlocking run lock for detach", StateAsCString(new_state)); 1735 m_public_run_lock.SetStopped(); 1736 } 1737 else 1738 { 1739 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1740 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1741 if ((old_state_is_stopped != new_state_is_stopped)) 1742 { 1743 if (new_state_is_stopped && !restarted) 1744 { 1745 if (log) 1746 log->Printf("Process::SetPublicState (%s) -- unlocking run lock", StateAsCString(new_state)); 1747 m_public_run_lock.SetStopped(); 1748 } 1749 } 1750 } 1751 } 1752 } 1753 1754 Error 1755 Process::Resume () 1756 { 1757 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1758 if (log) 1759 log->Printf("Process::Resume -- locking run lock"); 1760 if (!m_public_run_lock.TrySetRunning()) 1761 { 1762 Error error("Resume request failed - process still running."); 1763 if (log) 1764 log->Printf ("Process::Resume: -- TrySetRunning failed, not resuming."); 1765 return error; 1766 } 1767 return PrivateResume(); 1768 } 1769 1770 Error 1771 Process::ResumeSynchronous (Stream *stream) 1772 { 1773 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1774 if (log) 1775 log->Printf("Process::ResumeSynchronous -- locking run lock"); 1776 if (!m_public_run_lock.TrySetRunning()) 1777 { 1778 Error error("Resume request failed - process still running."); 1779 if (log) 1780 log->Printf ("Process::Resume: -- TrySetRunning failed, not resuming."); 1781 return error; 1782 } 1783 1784 ListenerSP listener_sp (new Listener("lldb.Process.ResumeSynchronous.hijack")); 1785 HijackProcessEvents(listener_sp.get()); 1786 1787 Error error = PrivateResume(); 1788 if (error.Success()) 1789 { 1790 StateType state = WaitForProcessToStop (NULL, NULL, true, listener_sp.get(), stream); 1791 const bool must_be_alive = false; // eStateExited is ok, so this must be false 1792 if (!StateIsStoppedState(state, must_be_alive)) 1793 error.SetErrorStringWithFormat("process not in stopped state after synchronous resume: %s", StateAsCString(state)); 1794 } 1795 1796 // Undo the hijacking of process events... 1797 RestoreProcessEvents(); 1798 1799 return error; 1800 } 1801 1802 StateType 1803 Process::GetPrivateState () 1804 { 1805 return m_private_state.GetValue(); 1806 } 1807 1808 void 1809 Process::SetPrivateState (StateType new_state) 1810 { 1811 if (m_finalize_called) 1812 return; 1813 1814 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1815 bool state_changed = false; 1816 1817 if (log) 1818 log->Printf("Process::SetPrivateState (%s)", StateAsCString(new_state)); 1819 1820 Mutex::Locker thread_locker(m_thread_list.GetMutex()); 1821 Mutex::Locker locker(m_private_state.GetMutex()); 1822 1823 const StateType old_state = m_private_state.GetValueNoLock (); 1824 state_changed = old_state != new_state; 1825 1826 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1827 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1828 if (old_state_is_stopped != new_state_is_stopped) 1829 { 1830 if (new_state_is_stopped) 1831 m_private_run_lock.SetStopped(); 1832 else 1833 m_private_run_lock.SetRunning(); 1834 } 1835 1836 if (state_changed) 1837 { 1838 m_private_state.SetValueNoLock (new_state); 1839 EventSP event_sp (new Event (eBroadcastBitStateChanged, new ProcessEventData (shared_from_this(), new_state))); 1840 if (StateIsStoppedState(new_state, false)) 1841 { 1842 // Note, this currently assumes that all threads in the list 1843 // stop when the process stops. In the future we will want to 1844 // support a debugging model where some threads continue to run 1845 // while others are stopped. When that happens we will either need 1846 // a way for the thread list to identify which threads are stopping 1847 // or create a special thread list containing only threads which 1848 // actually stopped. 1849 // 1850 // The process plugin is responsible for managing the actual 1851 // behavior of the threads and should have stopped any threads 1852 // that are going to stop before we get here. 1853 m_thread_list.DidStop(); 1854 1855 m_mod_id.BumpStopID(); 1856 if (!m_mod_id.IsLastResumeForUserExpression()) 1857 m_mod_id.SetStopEventForLastNaturalStopID(event_sp); 1858 m_memory_cache.Clear(); 1859 if (log) 1860 log->Printf("Process::SetPrivateState (%s) stop_id = %u", StateAsCString(new_state), m_mod_id.GetStopID()); 1861 } 1862 1863 // Use our target to get a shared pointer to ourselves... 1864 if (m_finalize_called && PrivateStateThreadIsValid() == false) 1865 BroadcastEvent (event_sp); 1866 else 1867 m_private_state_broadcaster.BroadcastEvent (event_sp); 1868 } 1869 else 1870 { 1871 if (log) 1872 log->Printf("Process::SetPrivateState (%s) state didn't change. Ignoring...", StateAsCString(new_state)); 1873 } 1874 } 1875 1876 void 1877 Process::SetRunningUserExpression (bool on) 1878 { 1879 m_mod_id.SetRunningUserExpression (on); 1880 } 1881 1882 addr_t 1883 Process::GetImageInfoAddress() 1884 { 1885 return LLDB_INVALID_ADDRESS; 1886 } 1887 1888 //---------------------------------------------------------------------- 1889 // LoadImage 1890 // 1891 // This function provides a default implementation that works for most 1892 // unix variants. Any Process subclasses that need to do shared library 1893 // loading differently should override LoadImage and UnloadImage and 1894 // do what is needed. 1895 //---------------------------------------------------------------------- 1896 uint32_t 1897 Process::LoadImage (const FileSpec &image_spec, Error &error) 1898 { 1899 if (m_finalizing) 1900 { 1901 error.SetErrorString("process is tearing itself down"); 1902 return LLDB_INVALID_IMAGE_TOKEN; 1903 } 1904 1905 char path[PATH_MAX]; 1906 image_spec.GetPath(path, sizeof(path)); 1907 1908 DynamicLoader *loader = GetDynamicLoader(); 1909 if (loader) 1910 { 1911 error = loader->CanLoadImage(); 1912 if (error.Fail()) 1913 return LLDB_INVALID_IMAGE_TOKEN; 1914 } 1915 1916 if (error.Success()) 1917 { 1918 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 1919 1920 if (thread_sp) 1921 { 1922 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 1923 1924 if (frame_sp) 1925 { 1926 ExecutionContext exe_ctx; 1927 frame_sp->CalculateExecutionContext (exe_ctx); 1928 EvaluateExpressionOptions expr_options; 1929 expr_options.SetUnwindOnError(true); 1930 expr_options.SetIgnoreBreakpoints(true); 1931 expr_options.SetExecutionPolicy(eExecutionPolicyAlways); 1932 expr_options.SetResultIsInternal(true); 1933 expr_options.SetLanguage(eLanguageTypeC_plus_plus); 1934 1935 StreamString expr; 1936 expr.Printf(R"( 1937 struct __lldb_dlopen_result { void *image_ptr; const char *error_str; } the_result; 1938 the_result.image_ptr = dlopen ("%s", 2); 1939 if (the_result.image_ptr == (void *) 0x0) 1940 { 1941 the_result.error_str = dlerror(); 1942 } 1943 else 1944 { 1945 the_result.error_str = (const char *) 0x0; 1946 } 1947 the_result; 1948 )", 1949 path); 1950 const char *prefix = R"( 1951 extern "C" void* dlopen (const char *path, int mode); 1952 extern "C" const char *dlerror (void); 1953 )"; 1954 lldb::ValueObjectSP result_valobj_sp; 1955 Error expr_error; 1956 UserExpression::Evaluate (exe_ctx, 1957 expr_options, 1958 expr.GetData(), 1959 prefix, 1960 result_valobj_sp, 1961 expr_error); 1962 if (expr_error.Success()) 1963 { 1964 error = result_valobj_sp->GetError(); 1965 if (error.Success()) 1966 { 1967 Scalar scalar; 1968 ValueObjectSP image_ptr_sp = result_valobj_sp->GetChildAtIndex(0, true); 1969 if (image_ptr_sp && image_ptr_sp->ResolveValue (scalar)) 1970 { 1971 addr_t image_ptr = scalar.ULongLong(LLDB_INVALID_ADDRESS); 1972 if (image_ptr != 0 && image_ptr != LLDB_INVALID_ADDRESS) 1973 { 1974 uint32_t image_token = m_image_tokens.size(); 1975 m_image_tokens.push_back (image_ptr); 1976 return image_token; 1977 } 1978 else if (image_ptr == 0) 1979 { 1980 ValueObjectSP error_str_sp = result_valobj_sp->GetChildAtIndex(1, true); 1981 if (error_str_sp) 1982 { 1983 if (error_str_sp->IsCStringContainer(true)) 1984 { 1985 DataBufferSP buffer_sp(new DataBufferHeap(10240,0)); 1986 size_t num_chars = error_str_sp->ReadPointedString (buffer_sp, error, 10240).first; 1987 if (error.Success() && num_chars > 0) 1988 { 1989 error.Clear(); 1990 error.SetErrorStringWithFormat("dlopen error: %s", buffer_sp->GetBytes()); 1991 } 1992 else 1993 { 1994 error.Clear(); 1995 error.SetErrorStringWithFormat("dlopen failed for unknown reasons."); 1996 } 1997 } 1998 } 1999 } 2000 } 2001 } 2002 } 2003 else 2004 error = expr_error; 2005 } 2006 } 2007 } 2008 if (!error.AsCString()) 2009 error.SetErrorStringWithFormat("unable to load '%s'", path); 2010 return LLDB_INVALID_IMAGE_TOKEN; 2011 } 2012 2013 //---------------------------------------------------------------------- 2014 // UnloadImage 2015 // 2016 // This function provides a default implementation that works for most 2017 // unix variants. Any Process subclasses that need to do shared library 2018 // loading differently should override LoadImage and UnloadImage and 2019 // do what is needed. 2020 //---------------------------------------------------------------------- 2021 Error 2022 Process::UnloadImage (uint32_t image_token) 2023 { 2024 Error error; 2025 2026 if (m_finalizing) 2027 { 2028 error.SetErrorString("process is tearing itself down"); 2029 return error; 2030 } 2031 2032 if (image_token < m_image_tokens.size()) 2033 { 2034 const addr_t image_addr = m_image_tokens[image_token]; 2035 if (image_addr == LLDB_INVALID_ADDRESS) 2036 { 2037 error.SetErrorString("image already unloaded"); 2038 } 2039 else 2040 { 2041 DynamicLoader *loader = GetDynamicLoader(); 2042 if (loader) 2043 error = loader->CanLoadImage(); 2044 2045 if (error.Success()) 2046 { 2047 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 2048 2049 if (thread_sp) 2050 { 2051 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 2052 2053 if (frame_sp) 2054 { 2055 ExecutionContext exe_ctx; 2056 frame_sp->CalculateExecutionContext (exe_ctx); 2057 EvaluateExpressionOptions expr_options; 2058 expr_options.SetUnwindOnError(true); 2059 expr_options.SetIgnoreBreakpoints(true); 2060 expr_options.SetExecutionPolicy(eExecutionPolicyAlways); 2061 expr_options.SetLanguage(eLanguageTypeC_plus_plus); 2062 2063 StreamString expr; 2064 expr.Printf("dlclose ((void *)0x%" PRIx64 ")", image_addr); 2065 const char *prefix = "extern \"C\" int dlclose(void* handle);\n"; 2066 lldb::ValueObjectSP result_valobj_sp; 2067 Error expr_error; 2068 UserExpression::Evaluate (exe_ctx, 2069 expr_options, 2070 expr.GetData(), 2071 prefix, 2072 result_valobj_sp, 2073 expr_error); 2074 if (result_valobj_sp->GetError().Success()) 2075 { 2076 Scalar scalar; 2077 if (result_valobj_sp->ResolveValue (scalar)) 2078 { 2079 if (scalar.UInt(1)) 2080 { 2081 error.SetErrorStringWithFormat("expression failed: \"%s\"", expr.GetData()); 2082 } 2083 else 2084 { 2085 m_image_tokens[image_token] = LLDB_INVALID_ADDRESS; 2086 } 2087 } 2088 } 2089 else 2090 { 2091 error = result_valobj_sp->GetError(); 2092 } 2093 } 2094 } 2095 } 2096 } 2097 } 2098 else 2099 { 2100 error.SetErrorString("invalid image token"); 2101 } 2102 return error; 2103 } 2104 2105 const lldb::ABISP & 2106 Process::GetABI() 2107 { 2108 if (!m_abi_sp) 2109 m_abi_sp = ABI::FindPlugin(GetTarget().GetArchitecture()); 2110 return m_abi_sp; 2111 } 2112 2113 LanguageRuntime * 2114 Process::GetLanguageRuntime(lldb::LanguageType language, bool retry_if_null) 2115 { 2116 if (m_finalizing) 2117 return nullptr; 2118 2119 LanguageRuntimeCollection::iterator pos; 2120 pos = m_language_runtimes.find (language); 2121 if (pos == m_language_runtimes.end() || (retry_if_null && !(*pos).second)) 2122 { 2123 lldb::LanguageRuntimeSP runtime_sp(LanguageRuntime::FindPlugin(this, language)); 2124 2125 m_language_runtimes[language] = runtime_sp; 2126 return runtime_sp.get(); 2127 } 2128 else 2129 return (*pos).second.get(); 2130 } 2131 2132 CPPLanguageRuntime * 2133 Process::GetCPPLanguageRuntime (bool retry_if_null) 2134 { 2135 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeC_plus_plus, retry_if_null); 2136 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeC_plus_plus) 2137 return static_cast<CPPLanguageRuntime *> (runtime); 2138 return NULL; 2139 } 2140 2141 ObjCLanguageRuntime * 2142 Process::GetObjCLanguageRuntime (bool retry_if_null) 2143 { 2144 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeObjC, retry_if_null); 2145 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeObjC) 2146 return static_cast<ObjCLanguageRuntime *> (runtime); 2147 return NULL; 2148 } 2149 2150 bool 2151 Process::IsPossibleDynamicValue (ValueObject& in_value) 2152 { 2153 if (m_finalizing) 2154 return false; 2155 2156 if (in_value.IsDynamic()) 2157 return false; 2158 LanguageType known_type = in_value.GetObjectRuntimeLanguage(); 2159 2160 if (known_type != eLanguageTypeUnknown && known_type != eLanguageTypeC) 2161 { 2162 LanguageRuntime *runtime = GetLanguageRuntime (known_type); 2163 return runtime ? runtime->CouldHaveDynamicValue(in_value) : false; 2164 } 2165 2166 LanguageRuntime *cpp_runtime = GetLanguageRuntime (eLanguageTypeC_plus_plus); 2167 if (cpp_runtime && cpp_runtime->CouldHaveDynamicValue(in_value)) 2168 return true; 2169 2170 LanguageRuntime *objc_runtime = GetLanguageRuntime (eLanguageTypeObjC); 2171 return objc_runtime ? objc_runtime->CouldHaveDynamicValue(in_value) : false; 2172 } 2173 2174 void 2175 Process::SetDynamicCheckers(DynamicCheckerFunctions *dynamic_checkers) 2176 { 2177 m_dynamic_checkers_ap.reset(dynamic_checkers); 2178 } 2179 2180 BreakpointSiteList & 2181 Process::GetBreakpointSiteList() 2182 { 2183 return m_breakpoint_site_list; 2184 } 2185 2186 const BreakpointSiteList & 2187 Process::GetBreakpointSiteList() const 2188 { 2189 return m_breakpoint_site_list; 2190 } 2191 2192 void 2193 Process::DisableAllBreakpointSites () 2194 { 2195 m_breakpoint_site_list.ForEach([this](BreakpointSite *bp_site) -> void { 2196 // bp_site->SetEnabled(true); 2197 DisableBreakpointSite(bp_site); 2198 }); 2199 } 2200 2201 Error 2202 Process::ClearBreakpointSiteByID (lldb::user_id_t break_id) 2203 { 2204 Error error (DisableBreakpointSiteByID (break_id)); 2205 2206 if (error.Success()) 2207 m_breakpoint_site_list.Remove(break_id); 2208 2209 return error; 2210 } 2211 2212 Error 2213 Process::DisableBreakpointSiteByID (lldb::user_id_t break_id) 2214 { 2215 Error error; 2216 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2217 if (bp_site_sp) 2218 { 2219 if (bp_site_sp->IsEnabled()) 2220 error = DisableBreakpointSite (bp_site_sp.get()); 2221 } 2222 else 2223 { 2224 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2225 } 2226 2227 return error; 2228 } 2229 2230 Error 2231 Process::EnableBreakpointSiteByID (lldb::user_id_t break_id) 2232 { 2233 Error error; 2234 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2235 if (bp_site_sp) 2236 { 2237 if (!bp_site_sp->IsEnabled()) 2238 error = EnableBreakpointSite (bp_site_sp.get()); 2239 } 2240 else 2241 { 2242 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2243 } 2244 return error; 2245 } 2246 2247 lldb::break_id_t 2248 Process::CreateBreakpointSite (const BreakpointLocationSP &owner, bool use_hardware) 2249 { 2250 addr_t load_addr = LLDB_INVALID_ADDRESS; 2251 2252 bool show_error = true; 2253 switch (GetState()) 2254 { 2255 case eStateInvalid: 2256 case eStateUnloaded: 2257 case eStateConnected: 2258 case eStateAttaching: 2259 case eStateLaunching: 2260 case eStateDetached: 2261 case eStateExited: 2262 show_error = false; 2263 break; 2264 2265 case eStateStopped: 2266 case eStateRunning: 2267 case eStateStepping: 2268 case eStateCrashed: 2269 case eStateSuspended: 2270 show_error = IsAlive(); 2271 break; 2272 } 2273 2274 // Reset the IsIndirect flag here, in case the location changes from 2275 // pointing to a indirect symbol to a regular symbol. 2276 owner->SetIsIndirect (false); 2277 2278 if (owner->ShouldResolveIndirectFunctions()) 2279 { 2280 Symbol *symbol = owner->GetAddress().CalculateSymbolContextSymbol(); 2281 if (symbol && symbol->IsIndirect()) 2282 { 2283 Error error; 2284 Address symbol_address = symbol->GetAddress(); 2285 load_addr = ResolveIndirectFunction (&symbol_address, error); 2286 if (!error.Success() && show_error) 2287 { 2288 GetTarget().GetDebugger().GetErrorFile()->Printf ("warning: failed to resolve indirect function at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2289 symbol->GetLoadAddress(&GetTarget()), 2290 owner->GetBreakpoint().GetID(), 2291 owner->GetID(), 2292 error.AsCString() ? error.AsCString() : "unknown error"); 2293 return LLDB_INVALID_BREAK_ID; 2294 } 2295 Address resolved_address(load_addr); 2296 load_addr = resolved_address.GetOpcodeLoadAddress (&GetTarget()); 2297 owner->SetIsIndirect(true); 2298 } 2299 else 2300 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&GetTarget()); 2301 } 2302 else 2303 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&GetTarget()); 2304 2305 if (load_addr != LLDB_INVALID_ADDRESS) 2306 { 2307 BreakpointSiteSP bp_site_sp; 2308 2309 // Look up this breakpoint site. If it exists, then add this new owner, otherwise 2310 // create a new breakpoint site and add it. 2311 2312 bp_site_sp = m_breakpoint_site_list.FindByAddress (load_addr); 2313 2314 if (bp_site_sp) 2315 { 2316 bp_site_sp->AddOwner (owner); 2317 owner->SetBreakpointSite (bp_site_sp); 2318 return bp_site_sp->GetID(); 2319 } 2320 else 2321 { 2322 bp_site_sp.reset (new BreakpointSite (&m_breakpoint_site_list, owner, load_addr, use_hardware)); 2323 if (bp_site_sp) 2324 { 2325 Error error = EnableBreakpointSite (bp_site_sp.get()); 2326 if (error.Success()) 2327 { 2328 owner->SetBreakpointSite (bp_site_sp); 2329 return m_breakpoint_site_list.Add (bp_site_sp); 2330 } 2331 else 2332 { 2333 if (show_error) 2334 { 2335 // Report error for setting breakpoint... 2336 GetTarget().GetDebugger().GetErrorFile()->Printf ("warning: failed to set breakpoint site at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2337 load_addr, 2338 owner->GetBreakpoint().GetID(), 2339 owner->GetID(), 2340 error.AsCString() ? error.AsCString() : "unknown error"); 2341 } 2342 } 2343 } 2344 } 2345 } 2346 // We failed to enable the breakpoint 2347 return LLDB_INVALID_BREAK_ID; 2348 } 2349 2350 void 2351 Process::RemoveOwnerFromBreakpointSite (lldb::user_id_t owner_id, lldb::user_id_t owner_loc_id, BreakpointSiteSP &bp_site_sp) 2352 { 2353 uint32_t num_owners = bp_site_sp->RemoveOwner (owner_id, owner_loc_id); 2354 if (num_owners == 0) 2355 { 2356 // Don't try to disable the site if we don't have a live process anymore. 2357 if (IsAlive()) 2358 DisableBreakpointSite (bp_site_sp.get()); 2359 m_breakpoint_site_list.RemoveByAddress(bp_site_sp->GetLoadAddress()); 2360 } 2361 } 2362 2363 size_t 2364 Process::RemoveBreakpointOpcodesFromBuffer (addr_t bp_addr, size_t size, uint8_t *buf) const 2365 { 2366 size_t bytes_removed = 0; 2367 BreakpointSiteList bp_sites_in_range; 2368 2369 if (m_breakpoint_site_list.FindInRange (bp_addr, bp_addr + size, bp_sites_in_range)) 2370 { 2371 bp_sites_in_range.ForEach([bp_addr, size, buf, &bytes_removed](BreakpointSite *bp_site) -> void { 2372 if (bp_site->GetType() == BreakpointSite::eSoftware) 2373 { 2374 addr_t intersect_addr; 2375 size_t intersect_size; 2376 size_t opcode_offset; 2377 if (bp_site->IntersectsRange(bp_addr, size, &intersect_addr, &intersect_size, &opcode_offset)) 2378 { 2379 assert(bp_addr <= intersect_addr && intersect_addr < bp_addr + size); 2380 assert(bp_addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= bp_addr + size); 2381 assert(opcode_offset + intersect_size <= bp_site->GetByteSize()); 2382 size_t buf_offset = intersect_addr - bp_addr; 2383 ::memcpy(buf + buf_offset, bp_site->GetSavedOpcodeBytes() + opcode_offset, intersect_size); 2384 } 2385 } 2386 }); 2387 } 2388 return bytes_removed; 2389 } 2390 2391 size_t 2392 Process::GetSoftwareBreakpointTrapOpcode (BreakpointSite* bp_site) 2393 { 2394 PlatformSP platform_sp (GetTarget().GetPlatform()); 2395 if (platform_sp) 2396 return platform_sp->GetSoftwareBreakpointTrapOpcode (GetTarget(), bp_site); 2397 return 0; 2398 } 2399 2400 Error 2401 Process::EnableSoftwareBreakpoint (BreakpointSite *bp_site) 2402 { 2403 Error error; 2404 assert (bp_site != NULL); 2405 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2406 const addr_t bp_addr = bp_site->GetLoadAddress(); 2407 if (log) 2408 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64, bp_site->GetID(), (uint64_t)bp_addr); 2409 if (bp_site->IsEnabled()) 2410 { 2411 if (log) 2412 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already enabled", bp_site->GetID(), (uint64_t)bp_addr); 2413 return error; 2414 } 2415 2416 if (bp_addr == LLDB_INVALID_ADDRESS) 2417 { 2418 error.SetErrorString("BreakpointSite contains an invalid load address."); 2419 return error; 2420 } 2421 // Ask the lldb::Process subclass to fill in the correct software breakpoint 2422 // trap for the breakpoint site 2423 const size_t bp_opcode_size = GetSoftwareBreakpointTrapOpcode(bp_site); 2424 2425 if (bp_opcode_size == 0) 2426 { 2427 error.SetErrorStringWithFormat ("Process::GetSoftwareBreakpointTrapOpcode() returned zero, unable to get breakpoint trap for address 0x%" PRIx64, bp_addr); 2428 } 2429 else 2430 { 2431 const uint8_t * const bp_opcode_bytes = bp_site->GetTrapOpcodeBytes(); 2432 2433 if (bp_opcode_bytes == NULL) 2434 { 2435 error.SetErrorString ("BreakpointSite doesn't contain a valid breakpoint trap opcode."); 2436 return error; 2437 } 2438 2439 // Save the original opcode by reading it 2440 if (DoReadMemory(bp_addr, bp_site->GetSavedOpcodeBytes(), bp_opcode_size, error) == bp_opcode_size) 2441 { 2442 // Write a software breakpoint in place of the original opcode 2443 if (DoWriteMemory(bp_addr, bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2444 { 2445 uint8_t verify_bp_opcode_bytes[64]; 2446 if (DoReadMemory(bp_addr, verify_bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2447 { 2448 if (::memcmp(bp_opcode_bytes, verify_bp_opcode_bytes, bp_opcode_size) == 0) 2449 { 2450 bp_site->SetEnabled(true); 2451 bp_site->SetType (BreakpointSite::eSoftware); 2452 if (log) 2453 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", 2454 bp_site->GetID(), 2455 (uint64_t)bp_addr); 2456 } 2457 else 2458 error.SetErrorString("failed to verify the breakpoint trap in memory."); 2459 } 2460 else 2461 error.SetErrorString("Unable to read memory to verify breakpoint trap."); 2462 } 2463 else 2464 error.SetErrorString("Unable to write breakpoint trap to memory."); 2465 } 2466 else 2467 error.SetErrorString("Unable to read memory at breakpoint address."); 2468 } 2469 if (log && error.Fail()) 2470 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2471 bp_site->GetID(), 2472 (uint64_t)bp_addr, 2473 error.AsCString()); 2474 return error; 2475 } 2476 2477 Error 2478 Process::DisableSoftwareBreakpoint (BreakpointSite *bp_site) 2479 { 2480 Error error; 2481 assert (bp_site != NULL); 2482 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2483 addr_t bp_addr = bp_site->GetLoadAddress(); 2484 lldb::user_id_t breakID = bp_site->GetID(); 2485 if (log) 2486 log->Printf ("Process::DisableSoftwareBreakpoint (breakID = %" PRIu64 ") addr = 0x%" PRIx64, breakID, (uint64_t)bp_addr); 2487 2488 if (bp_site->IsHardware()) 2489 { 2490 error.SetErrorString("Breakpoint site is a hardware breakpoint."); 2491 } 2492 else if (bp_site->IsEnabled()) 2493 { 2494 const size_t break_op_size = bp_site->GetByteSize(); 2495 const uint8_t * const break_op = bp_site->GetTrapOpcodeBytes(); 2496 if (break_op_size > 0) 2497 { 2498 // Clear a software breakpoint instruction 2499 uint8_t curr_break_op[8]; 2500 assert (break_op_size <= sizeof(curr_break_op)); 2501 bool break_op_found = false; 2502 2503 // Read the breakpoint opcode 2504 if (DoReadMemory (bp_addr, curr_break_op, break_op_size, error) == break_op_size) 2505 { 2506 bool verify = false; 2507 // Make sure the breakpoint opcode exists at this address 2508 if (::memcmp (curr_break_op, break_op, break_op_size) == 0) 2509 { 2510 break_op_found = true; 2511 // We found a valid breakpoint opcode at this address, now restore 2512 // the saved opcode. 2513 if (DoWriteMemory (bp_addr, bp_site->GetSavedOpcodeBytes(), break_op_size, error) == break_op_size) 2514 { 2515 verify = true; 2516 } 2517 else 2518 error.SetErrorString("Memory write failed when restoring original opcode."); 2519 } 2520 else 2521 { 2522 error.SetErrorString("Original breakpoint trap is no longer in memory."); 2523 // Set verify to true and so we can check if the original opcode has already been restored 2524 verify = true; 2525 } 2526 2527 if (verify) 2528 { 2529 uint8_t verify_opcode[8]; 2530 assert (break_op_size < sizeof(verify_opcode)); 2531 // Verify that our original opcode made it back to the inferior 2532 if (DoReadMemory (bp_addr, verify_opcode, break_op_size, error) == break_op_size) 2533 { 2534 // compare the memory we just read with the original opcode 2535 if (::memcmp (bp_site->GetSavedOpcodeBytes(), verify_opcode, break_op_size) == 0) 2536 { 2537 // SUCCESS 2538 bp_site->SetEnabled(false); 2539 if (log) 2540 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", bp_site->GetID(), (uint64_t)bp_addr); 2541 return error; 2542 } 2543 else 2544 { 2545 if (break_op_found) 2546 error.SetErrorString("Failed to restore original opcode."); 2547 } 2548 } 2549 else 2550 error.SetErrorString("Failed to read memory to verify that breakpoint trap was restored."); 2551 } 2552 } 2553 else 2554 error.SetErrorString("Unable to read memory that should contain the breakpoint trap."); 2555 } 2556 } 2557 else 2558 { 2559 if (log) 2560 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already disabled", bp_site->GetID(), (uint64_t)bp_addr); 2561 return error; 2562 } 2563 2564 if (log) 2565 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2566 bp_site->GetID(), 2567 (uint64_t)bp_addr, 2568 error.AsCString()); 2569 return error; 2570 } 2571 2572 // Uncomment to verify memory caching works after making changes to caching code 2573 //#define VERIFY_MEMORY_READS 2574 2575 size_t 2576 Process::ReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2577 { 2578 error.Clear(); 2579 if (!GetDisableMemoryCache()) 2580 { 2581 #if defined (VERIFY_MEMORY_READS) 2582 // Memory caching is enabled, with debug verification 2583 2584 if (buf && size) 2585 { 2586 // Uncomment the line below to make sure memory caching is working. 2587 // I ran this through the test suite and got no assertions, so I am 2588 // pretty confident this is working well. If any changes are made to 2589 // memory caching, uncomment the line below and test your changes! 2590 2591 // Verify all memory reads by using the cache first, then redundantly 2592 // reading the same memory from the inferior and comparing to make sure 2593 // everything is exactly the same. 2594 std::string verify_buf (size, '\0'); 2595 assert (verify_buf.size() == size); 2596 const size_t cache_bytes_read = m_memory_cache.Read (this, addr, buf, size, error); 2597 Error verify_error; 2598 const size_t verify_bytes_read = ReadMemoryFromInferior (addr, const_cast<char *>(verify_buf.data()), verify_buf.size(), verify_error); 2599 assert (cache_bytes_read == verify_bytes_read); 2600 assert (memcmp(buf, verify_buf.data(), verify_buf.size()) == 0); 2601 assert (verify_error.Success() == error.Success()); 2602 return cache_bytes_read; 2603 } 2604 return 0; 2605 #else // !defined(VERIFY_MEMORY_READS) 2606 // Memory caching is enabled, without debug verification 2607 2608 return m_memory_cache.Read (addr, buf, size, error); 2609 #endif // defined (VERIFY_MEMORY_READS) 2610 } 2611 else 2612 { 2613 // Memory caching is disabled 2614 2615 return ReadMemoryFromInferior (addr, buf, size, error); 2616 } 2617 } 2618 2619 size_t 2620 Process::ReadCStringFromMemory (addr_t addr, std::string &out_str, Error &error) 2621 { 2622 char buf[256]; 2623 out_str.clear(); 2624 addr_t curr_addr = addr; 2625 while (1) 2626 { 2627 size_t length = ReadCStringFromMemory (curr_addr, buf, sizeof(buf), error); 2628 if (length == 0) 2629 break; 2630 out_str.append(buf, length); 2631 // If we got "length - 1" bytes, we didn't get the whole C string, we 2632 // need to read some more characters 2633 if (length == sizeof(buf) - 1) 2634 curr_addr += length; 2635 else 2636 break; 2637 } 2638 return out_str.size(); 2639 } 2640 2641 size_t 2642 Process::ReadStringFromMemory (addr_t addr, char *dst, size_t max_bytes, Error &error, 2643 size_t type_width) 2644 { 2645 size_t total_bytes_read = 0; 2646 if (dst && max_bytes && type_width && max_bytes >= type_width) 2647 { 2648 // Ensure a null terminator independent of the number of bytes that is read. 2649 memset (dst, 0, max_bytes); 2650 size_t bytes_left = max_bytes - type_width; 2651 2652 const char terminator[4] = {'\0', '\0', '\0', '\0'}; 2653 assert(sizeof(terminator) >= type_width && 2654 "Attempting to validate a string with more than 4 bytes per character!"); 2655 2656 addr_t curr_addr = addr; 2657 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2658 char *curr_dst = dst; 2659 2660 error.Clear(); 2661 while (bytes_left > 0 && error.Success()) 2662 { 2663 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2664 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2665 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2666 2667 if (bytes_read == 0) 2668 break; 2669 2670 // Search for a null terminator of correct size and alignment in bytes_read 2671 size_t aligned_start = total_bytes_read - total_bytes_read % type_width; 2672 for (size_t i = aligned_start; i + type_width <= total_bytes_read + bytes_read; i += type_width) 2673 if (::strncmp(&dst[i], terminator, type_width) == 0) 2674 { 2675 error.Clear(); 2676 return i; 2677 } 2678 2679 total_bytes_read += bytes_read; 2680 curr_dst += bytes_read; 2681 curr_addr += bytes_read; 2682 bytes_left -= bytes_read; 2683 } 2684 } 2685 else 2686 { 2687 if (max_bytes) 2688 error.SetErrorString("invalid arguments"); 2689 } 2690 return total_bytes_read; 2691 } 2692 2693 // Deprecated in favor of ReadStringFromMemory which has wchar support and correct code to find 2694 // null terminators. 2695 size_t 2696 Process::ReadCStringFromMemory (addr_t addr, char *dst, size_t dst_max_len, Error &result_error) 2697 { 2698 size_t total_cstr_len = 0; 2699 if (dst && dst_max_len) 2700 { 2701 result_error.Clear(); 2702 // NULL out everything just to be safe 2703 memset (dst, 0, dst_max_len); 2704 Error error; 2705 addr_t curr_addr = addr; 2706 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2707 size_t bytes_left = dst_max_len - 1; 2708 char *curr_dst = dst; 2709 2710 while (bytes_left > 0) 2711 { 2712 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2713 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2714 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2715 2716 if (bytes_read == 0) 2717 { 2718 result_error = error; 2719 dst[total_cstr_len] = '\0'; 2720 break; 2721 } 2722 const size_t len = strlen(curr_dst); 2723 2724 total_cstr_len += len; 2725 2726 if (len < bytes_to_read) 2727 break; 2728 2729 curr_dst += bytes_read; 2730 curr_addr += bytes_read; 2731 bytes_left -= bytes_read; 2732 } 2733 } 2734 else 2735 { 2736 if (dst == NULL) 2737 result_error.SetErrorString("invalid arguments"); 2738 else 2739 result_error.Clear(); 2740 } 2741 return total_cstr_len; 2742 } 2743 2744 size_t 2745 Process::ReadMemoryFromInferior (addr_t addr, void *buf, size_t size, Error &error) 2746 { 2747 if (buf == NULL || size == 0) 2748 return 0; 2749 2750 size_t bytes_read = 0; 2751 uint8_t *bytes = (uint8_t *)buf; 2752 2753 while (bytes_read < size) 2754 { 2755 const size_t curr_size = size - bytes_read; 2756 const size_t curr_bytes_read = DoReadMemory (addr + bytes_read, 2757 bytes + bytes_read, 2758 curr_size, 2759 error); 2760 bytes_read += curr_bytes_read; 2761 if (curr_bytes_read == curr_size || curr_bytes_read == 0) 2762 break; 2763 } 2764 2765 // Replace any software breakpoint opcodes that fall into this range back 2766 // into "buf" before we return 2767 if (bytes_read > 0) 2768 RemoveBreakpointOpcodesFromBuffer (addr, bytes_read, (uint8_t *)buf); 2769 return bytes_read; 2770 } 2771 2772 uint64_t 2773 Process::ReadUnsignedIntegerFromMemory (lldb::addr_t vm_addr, size_t integer_byte_size, uint64_t fail_value, Error &error) 2774 { 2775 Scalar scalar; 2776 if (ReadScalarIntegerFromMemory(vm_addr, integer_byte_size, false, scalar, error)) 2777 return scalar.ULongLong(fail_value); 2778 return fail_value; 2779 } 2780 2781 addr_t 2782 Process::ReadPointerFromMemory (lldb::addr_t vm_addr, Error &error) 2783 { 2784 Scalar scalar; 2785 if (ReadScalarIntegerFromMemory(vm_addr, GetAddressByteSize(), false, scalar, error)) 2786 return scalar.ULongLong(LLDB_INVALID_ADDRESS); 2787 return LLDB_INVALID_ADDRESS; 2788 } 2789 2790 bool 2791 Process::WritePointerToMemory (lldb::addr_t vm_addr, 2792 lldb::addr_t ptr_value, 2793 Error &error) 2794 { 2795 Scalar scalar; 2796 const uint32_t addr_byte_size = GetAddressByteSize(); 2797 if (addr_byte_size <= 4) 2798 scalar = (uint32_t)ptr_value; 2799 else 2800 scalar = ptr_value; 2801 return WriteScalarToMemory(vm_addr, scalar, addr_byte_size, error) == addr_byte_size; 2802 } 2803 2804 size_t 2805 Process::WriteMemoryPrivate (addr_t addr, const void *buf, size_t size, Error &error) 2806 { 2807 size_t bytes_written = 0; 2808 const uint8_t *bytes = (const uint8_t *)buf; 2809 2810 while (bytes_written < size) 2811 { 2812 const size_t curr_size = size - bytes_written; 2813 const size_t curr_bytes_written = DoWriteMemory (addr + bytes_written, 2814 bytes + bytes_written, 2815 curr_size, 2816 error); 2817 bytes_written += curr_bytes_written; 2818 if (curr_bytes_written == curr_size || curr_bytes_written == 0) 2819 break; 2820 } 2821 return bytes_written; 2822 } 2823 2824 size_t 2825 Process::WriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2826 { 2827 #if defined (ENABLE_MEMORY_CACHING) 2828 m_memory_cache.Flush (addr, size); 2829 #endif 2830 2831 if (buf == NULL || size == 0) 2832 return 0; 2833 2834 m_mod_id.BumpMemoryID(); 2835 2836 // We need to write any data that would go where any current software traps 2837 // (enabled software breakpoints) any software traps (breakpoints) that we 2838 // may have placed in our tasks memory. 2839 2840 BreakpointSiteList bp_sites_in_range; 2841 2842 if (m_breakpoint_site_list.FindInRange (addr, addr + size, bp_sites_in_range)) 2843 { 2844 // No breakpoint sites overlap 2845 if (bp_sites_in_range.IsEmpty()) 2846 return WriteMemoryPrivate (addr, buf, size, error); 2847 else 2848 { 2849 const uint8_t *ubuf = (const uint8_t *)buf; 2850 uint64_t bytes_written = 0; 2851 2852 bp_sites_in_range.ForEach([this, addr, size, &bytes_written, &ubuf, &error](BreakpointSite *bp) -> void { 2853 2854 if (error.Success()) 2855 { 2856 addr_t intersect_addr; 2857 size_t intersect_size; 2858 size_t opcode_offset; 2859 const bool intersects = bp->IntersectsRange(addr, size, &intersect_addr, &intersect_size, &opcode_offset); 2860 UNUSED_IF_ASSERT_DISABLED(intersects); 2861 assert(intersects); 2862 assert(addr <= intersect_addr && intersect_addr < addr + size); 2863 assert(addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= addr + size); 2864 assert(opcode_offset + intersect_size <= bp->GetByteSize()); 2865 2866 // Check for bytes before this breakpoint 2867 const addr_t curr_addr = addr + bytes_written; 2868 if (intersect_addr > curr_addr) 2869 { 2870 // There are some bytes before this breakpoint that we need to 2871 // just write to memory 2872 size_t curr_size = intersect_addr - curr_addr; 2873 size_t curr_bytes_written = WriteMemoryPrivate (curr_addr, 2874 ubuf + bytes_written, 2875 curr_size, 2876 error); 2877 bytes_written += curr_bytes_written; 2878 if (curr_bytes_written != curr_size) 2879 { 2880 // We weren't able to write all of the requested bytes, we 2881 // are done looping and will return the number of bytes that 2882 // we have written so far. 2883 if (error.Success()) 2884 error.SetErrorToGenericError(); 2885 } 2886 } 2887 // Now write any bytes that would cover up any software breakpoints 2888 // directly into the breakpoint opcode buffer 2889 ::memcpy(bp->GetSavedOpcodeBytes() + opcode_offset, ubuf + bytes_written, intersect_size); 2890 bytes_written += intersect_size; 2891 } 2892 }); 2893 2894 if (bytes_written < size) 2895 WriteMemoryPrivate (addr + bytes_written, 2896 ubuf + bytes_written, 2897 size - bytes_written, 2898 error); 2899 } 2900 } 2901 else 2902 { 2903 return WriteMemoryPrivate (addr, buf, size, error); 2904 } 2905 2906 // Write any remaining bytes after the last breakpoint if we have any left 2907 return 0; //bytes_written; 2908 } 2909 2910 size_t 2911 Process::WriteScalarToMemory (addr_t addr, const Scalar &scalar, size_t byte_size, Error &error) 2912 { 2913 if (byte_size == UINT32_MAX) 2914 byte_size = scalar.GetByteSize(); 2915 if (byte_size > 0) 2916 { 2917 uint8_t buf[32]; 2918 const size_t mem_size = scalar.GetAsMemoryData (buf, byte_size, GetByteOrder(), error); 2919 if (mem_size > 0) 2920 return WriteMemory(addr, buf, mem_size, error); 2921 else 2922 error.SetErrorString ("failed to get scalar as memory data"); 2923 } 2924 else 2925 { 2926 error.SetErrorString ("invalid scalar value"); 2927 } 2928 return 0; 2929 } 2930 2931 size_t 2932 Process::ReadScalarIntegerFromMemory (addr_t addr, 2933 uint32_t byte_size, 2934 bool is_signed, 2935 Scalar &scalar, 2936 Error &error) 2937 { 2938 uint64_t uval = 0; 2939 if (byte_size == 0) 2940 { 2941 error.SetErrorString ("byte size is zero"); 2942 } 2943 else if (byte_size & (byte_size - 1)) 2944 { 2945 error.SetErrorStringWithFormat ("byte size %u is not a power of 2", byte_size); 2946 } 2947 else if (byte_size <= sizeof(uval)) 2948 { 2949 const size_t bytes_read = ReadMemory (addr, &uval, byte_size, error); 2950 if (bytes_read == byte_size) 2951 { 2952 DataExtractor data (&uval, sizeof(uval), GetByteOrder(), GetAddressByteSize()); 2953 lldb::offset_t offset = 0; 2954 if (byte_size <= 4) 2955 scalar = data.GetMaxU32 (&offset, byte_size); 2956 else 2957 scalar = data.GetMaxU64 (&offset, byte_size); 2958 if (is_signed) 2959 scalar.SignExtend(byte_size * 8); 2960 return bytes_read; 2961 } 2962 } 2963 else 2964 { 2965 error.SetErrorStringWithFormat ("byte size of %u is too large for integer scalar type", byte_size); 2966 } 2967 return 0; 2968 } 2969 2970 #define USE_ALLOCATE_MEMORY_CACHE 1 2971 addr_t 2972 Process::AllocateMemory(size_t size, uint32_t permissions, Error &error) 2973 { 2974 if (GetPrivateState() != eStateStopped) 2975 return LLDB_INVALID_ADDRESS; 2976 2977 #if defined (USE_ALLOCATE_MEMORY_CACHE) 2978 return m_allocated_memory_cache.AllocateMemory(size, permissions, error); 2979 #else 2980 addr_t allocated_addr = DoAllocateMemory (size, permissions, error); 2981 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2982 if (log) 2983 log->Printf("Process::AllocateMemory(size=%" PRIu64 ", permissions=%s) => 0x%16.16" PRIx64 " (m_stop_id = %u m_memory_id = %u)", 2984 (uint64_t)size, 2985 GetPermissionsAsCString (permissions), 2986 (uint64_t)allocated_addr, 2987 m_mod_id.GetStopID(), 2988 m_mod_id.GetMemoryID()); 2989 return allocated_addr; 2990 #endif 2991 } 2992 2993 addr_t 2994 Process::CallocateMemory(size_t size, uint32_t permissions, Error &error) 2995 { 2996 addr_t return_addr = AllocateMemory(size, permissions, error); 2997 if (error.Success()) 2998 { 2999 std::string buffer(size, 0); 3000 WriteMemory(return_addr, buffer.c_str(), size, error); 3001 } 3002 return return_addr; 3003 } 3004 3005 bool 3006 Process::CanJIT () 3007 { 3008 if (m_can_jit == eCanJITDontKnow) 3009 { 3010 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3011 Error err; 3012 3013 uint64_t allocated_memory = AllocateMemory(8, 3014 ePermissionsReadable | ePermissionsWritable | ePermissionsExecutable, 3015 err); 3016 3017 if (err.Success()) 3018 { 3019 m_can_jit = eCanJITYes; 3020 if (log) 3021 log->Printf ("Process::%s pid %" PRIu64 " allocation test passed, CanJIT () is true", __FUNCTION__, GetID ()); 3022 } 3023 else 3024 { 3025 m_can_jit = eCanJITNo; 3026 if (log) 3027 log->Printf ("Process::%s pid %" PRIu64 " allocation test failed, CanJIT () is false: %s", __FUNCTION__, GetID (), err.AsCString ()); 3028 } 3029 3030 DeallocateMemory (allocated_memory); 3031 } 3032 3033 return m_can_jit == eCanJITYes; 3034 } 3035 3036 void 3037 Process::SetCanJIT (bool can_jit) 3038 { 3039 m_can_jit = (can_jit ? eCanJITYes : eCanJITNo); 3040 } 3041 3042 void 3043 Process::SetCanRunCode (bool can_run_code) 3044 { 3045 SetCanJIT(can_run_code); 3046 m_can_interpret_function_calls = can_run_code; 3047 } 3048 3049 Error 3050 Process::DeallocateMemory (addr_t ptr) 3051 { 3052 Error error; 3053 #if defined (USE_ALLOCATE_MEMORY_CACHE) 3054 if (!m_allocated_memory_cache.DeallocateMemory(ptr)) 3055 { 3056 error.SetErrorStringWithFormat ("deallocation of memory at 0x%" PRIx64 " failed.", (uint64_t)ptr); 3057 } 3058 #else 3059 error = DoDeallocateMemory (ptr); 3060 3061 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3062 if (log) 3063 log->Printf("Process::DeallocateMemory(addr=0x%16.16" PRIx64 ") => err = %s (m_stop_id = %u, m_memory_id = %u)", 3064 ptr, 3065 error.AsCString("SUCCESS"), 3066 m_mod_id.GetStopID(), 3067 m_mod_id.GetMemoryID()); 3068 #endif 3069 return error; 3070 } 3071 3072 ModuleSP 3073 Process::ReadModuleFromMemory (const FileSpec& file_spec, 3074 lldb::addr_t header_addr, 3075 size_t size_to_read) 3076 { 3077 Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST); 3078 if (log) 3079 { 3080 log->Printf ("Process::ReadModuleFromMemory reading %s binary from memory", file_spec.GetPath().c_str()); 3081 } 3082 ModuleSP module_sp (new Module (file_spec, ArchSpec())); 3083 if (module_sp) 3084 { 3085 Error error; 3086 ObjectFile *objfile = module_sp->GetMemoryObjectFile (shared_from_this(), header_addr, error, size_to_read); 3087 if (objfile) 3088 return module_sp; 3089 } 3090 return ModuleSP(); 3091 } 3092 3093 bool 3094 Process::GetLoadAddressPermissions (lldb::addr_t load_addr, uint32_t &permissions) 3095 { 3096 MemoryRegionInfo range_info; 3097 permissions = 0; 3098 Error error (GetMemoryRegionInfo (load_addr, range_info)); 3099 if (!error.Success()) 3100 return false; 3101 if (range_info.GetReadable() == MemoryRegionInfo::eDontKnow 3102 || range_info.GetWritable() == MemoryRegionInfo::eDontKnow 3103 || range_info.GetExecutable() == MemoryRegionInfo::eDontKnow) 3104 { 3105 return false; 3106 } 3107 3108 if (range_info.GetReadable() == MemoryRegionInfo::eYes) 3109 permissions |= lldb::ePermissionsReadable; 3110 3111 if (range_info.GetWritable() == MemoryRegionInfo::eYes) 3112 permissions |= lldb::ePermissionsWritable; 3113 3114 if (range_info.GetExecutable() == MemoryRegionInfo::eYes) 3115 permissions |= lldb::ePermissionsExecutable; 3116 3117 return true; 3118 } 3119 3120 Error 3121 Process::EnableWatchpoint (Watchpoint *watchpoint, bool notify) 3122 { 3123 Error error; 3124 error.SetErrorString("watchpoints are not supported"); 3125 return error; 3126 } 3127 3128 Error 3129 Process::DisableWatchpoint (Watchpoint *watchpoint, bool notify) 3130 { 3131 Error error; 3132 error.SetErrorString("watchpoints are not supported"); 3133 return error; 3134 } 3135 3136 StateType 3137 Process::WaitForProcessStopPrivate (const TimeValue *timeout, EventSP &event_sp) 3138 { 3139 StateType state; 3140 // Now wait for the process to launch and return control to us, and then 3141 // call DidLaunch: 3142 while (1) 3143 { 3144 event_sp.reset(); 3145 state = WaitForStateChangedEventsPrivate (timeout, event_sp); 3146 3147 if (StateIsStoppedState(state, false)) 3148 break; 3149 3150 // If state is invalid, then we timed out 3151 if (state == eStateInvalid) 3152 break; 3153 3154 if (event_sp) 3155 HandlePrivateEvent (event_sp); 3156 } 3157 return state; 3158 } 3159 3160 void 3161 Process::LoadOperatingSystemPlugin(bool flush) 3162 { 3163 if (flush) 3164 m_thread_list.Clear(); 3165 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3166 if (flush) 3167 Flush(); 3168 } 3169 3170 Error 3171 Process::Launch (ProcessLaunchInfo &launch_info) 3172 { 3173 Error error; 3174 m_abi_sp.reset(); 3175 m_dyld_ap.reset(); 3176 m_jit_loaders_ap.reset(); 3177 m_system_runtime_ap.reset(); 3178 m_os_ap.reset(); 3179 m_process_input_reader.reset(); 3180 m_stop_info_override_callback = NULL; 3181 3182 Module *exe_module = GetTarget().GetExecutableModulePointer(); 3183 if (exe_module) 3184 { 3185 char local_exec_file_path[PATH_MAX]; 3186 char platform_exec_file_path[PATH_MAX]; 3187 exe_module->GetFileSpec().GetPath(local_exec_file_path, sizeof(local_exec_file_path)); 3188 exe_module->GetPlatformFileSpec().GetPath(platform_exec_file_path, sizeof(platform_exec_file_path)); 3189 if (exe_module->GetFileSpec().Exists()) 3190 { 3191 // Install anything that might need to be installed prior to launching. 3192 // For host systems, this will do nothing, but if we are connected to a 3193 // remote platform it will install any needed binaries 3194 error = GetTarget().Install(&launch_info); 3195 if (error.Fail()) 3196 return error; 3197 3198 if (PrivateStateThreadIsValid ()) 3199 PausePrivateStateThread (); 3200 3201 error = WillLaunch (exe_module); 3202 if (error.Success()) 3203 { 3204 const bool restarted = false; 3205 SetPublicState (eStateLaunching, restarted); 3206 m_should_detach = false; 3207 3208 if (m_public_run_lock.TrySetRunning()) 3209 { 3210 // Now launch using these arguments. 3211 error = DoLaunch (exe_module, launch_info); 3212 } 3213 else 3214 { 3215 // This shouldn't happen 3216 error.SetErrorString("failed to acquire process run lock"); 3217 } 3218 3219 if (error.Fail()) 3220 { 3221 if (GetID() != LLDB_INVALID_PROCESS_ID) 3222 { 3223 SetID (LLDB_INVALID_PROCESS_ID); 3224 const char *error_string = error.AsCString(); 3225 if (error_string == NULL) 3226 error_string = "launch failed"; 3227 SetExitStatus (-1, error_string); 3228 } 3229 } 3230 else 3231 { 3232 EventSP event_sp; 3233 TimeValue timeout_time; 3234 timeout_time = TimeValue::Now(); 3235 timeout_time.OffsetWithSeconds(10); 3236 StateType state = WaitForProcessStopPrivate(&timeout_time, event_sp); 3237 3238 if (state == eStateInvalid || event_sp.get() == NULL) 3239 { 3240 // We were able to launch the process, but we failed to 3241 // catch the initial stop. 3242 error.SetErrorString ("failed to catch stop after launch"); 3243 SetExitStatus (0, "failed to catch stop after launch"); 3244 Destroy(false); 3245 } 3246 else if (state == eStateStopped || state == eStateCrashed) 3247 { 3248 DidLaunch (); 3249 3250 DynamicLoader *dyld = GetDynamicLoader (); 3251 if (dyld) 3252 dyld->DidLaunch(); 3253 3254 GetJITLoaders().DidLaunch(); 3255 3256 SystemRuntime *system_runtime = GetSystemRuntime (); 3257 if (system_runtime) 3258 system_runtime->DidLaunch(); 3259 3260 LoadOperatingSystemPlugin(false); 3261 3262 // Note, the stop event was consumed above, but not handled. This was done 3263 // to give DidLaunch a chance to run. The target is either stopped or crashed. 3264 // Directly set the state. This is done to prevent a stop message with a bunch 3265 // of spurious output on thread status, as well as not pop a ProcessIOHandler. 3266 SetPublicState(state, false); 3267 3268 if (PrivateStateThreadIsValid ()) 3269 ResumePrivateStateThread (); 3270 else 3271 StartPrivateStateThread (); 3272 3273 m_stop_info_override_callback = GetTarget().GetArchitecture().GetStopInfoOverrideCallback(); 3274 3275 // Target was stopped at entry as was intended. Need to notify the listeners 3276 // about it. 3277 if (state == eStateStopped && launch_info.GetFlags().Test(eLaunchFlagStopAtEntry)) 3278 HandlePrivateEvent(event_sp); 3279 } 3280 else if (state == eStateExited) 3281 { 3282 // We exited while trying to launch somehow. Don't call DidLaunch as that's 3283 // not likely to work, and return an invalid pid. 3284 HandlePrivateEvent (event_sp); 3285 } 3286 } 3287 } 3288 } 3289 else 3290 { 3291 error.SetErrorStringWithFormat("file doesn't exist: '%s'", local_exec_file_path); 3292 } 3293 } 3294 return error; 3295 } 3296 3297 Error 3298 Process::LoadCore () 3299 { 3300 Error error = DoLoadCore(); 3301 if (error.Success()) 3302 { 3303 Listener listener ("lldb.process.load_core_listener"); 3304 HijackProcessEvents(&listener); 3305 3306 if (PrivateStateThreadIsValid ()) 3307 ResumePrivateStateThread (); 3308 else 3309 StartPrivateStateThread (); 3310 3311 DynamicLoader *dyld = GetDynamicLoader (); 3312 if (dyld) 3313 dyld->DidAttach(); 3314 3315 GetJITLoaders().DidAttach(); 3316 3317 SystemRuntime *system_runtime = GetSystemRuntime (); 3318 if (system_runtime) 3319 system_runtime->DidAttach(); 3320 3321 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3322 // We successfully loaded a core file, now pretend we stopped so we can 3323 // show all of the threads in the core file and explore the crashed 3324 // state. 3325 SetPrivateState (eStateStopped); 3326 3327 // Wait indefinitely for a stopped event since we just posted one above... 3328 lldb::EventSP event_sp; 3329 listener.WaitForEvent (NULL, event_sp); 3330 StateType state = ProcessEventData::GetStateFromEvent(event_sp.get()); 3331 3332 if (!StateIsStoppedState (state, false)) 3333 { 3334 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3335 if (log) 3336 log->Printf("Process::Halt() failed to stop, state is: %s", StateAsCString(state)); 3337 error.SetErrorString ("Did not get stopped event after loading the core file."); 3338 } 3339 RestoreProcessEvents (); 3340 } 3341 return error; 3342 } 3343 3344 DynamicLoader * 3345 Process::GetDynamicLoader () 3346 { 3347 if (m_dyld_ap.get() == NULL) 3348 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 3349 return m_dyld_ap.get(); 3350 } 3351 3352 const lldb::DataBufferSP 3353 Process::GetAuxvData() 3354 { 3355 return DataBufferSP (); 3356 } 3357 3358 JITLoaderList & 3359 Process::GetJITLoaders () 3360 { 3361 if (!m_jit_loaders_ap) 3362 { 3363 m_jit_loaders_ap.reset(new JITLoaderList()); 3364 JITLoader::LoadPlugins(this, *m_jit_loaders_ap); 3365 } 3366 return *m_jit_loaders_ap; 3367 } 3368 3369 SystemRuntime * 3370 Process::GetSystemRuntime () 3371 { 3372 if (m_system_runtime_ap.get() == NULL) 3373 m_system_runtime_ap.reset (SystemRuntime::FindPlugin(this)); 3374 return m_system_runtime_ap.get(); 3375 } 3376 3377 Process::AttachCompletionHandler::AttachCompletionHandler (Process *process, uint32_t exec_count) : 3378 NextEventAction (process), 3379 m_exec_count (exec_count) 3380 { 3381 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3382 if (log) 3383 log->Printf ("Process::AttachCompletionHandler::%s process=%p, exec_count=%" PRIu32, __FUNCTION__, static_cast<void*>(process), exec_count); 3384 } 3385 3386 Process::NextEventAction::EventActionResult 3387 Process::AttachCompletionHandler::PerformAction (lldb::EventSP &event_sp) 3388 { 3389 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3390 3391 StateType state = ProcessEventData::GetStateFromEvent (event_sp.get()); 3392 if (log) 3393 log->Printf ("Process::AttachCompletionHandler::%s called with state %s (%d)", __FUNCTION__, StateAsCString(state), static_cast<int> (state)); 3394 3395 switch (state) 3396 { 3397 case eStateAttaching: 3398 return eEventActionSuccess; 3399 3400 case eStateRunning: 3401 case eStateConnected: 3402 return eEventActionRetry; 3403 3404 case eStateStopped: 3405 case eStateCrashed: 3406 { 3407 // During attach, prior to sending the eStateStopped event, 3408 // lldb_private::Process subclasses must set the new process ID. 3409 assert (m_process->GetID() != LLDB_INVALID_PROCESS_ID); 3410 // We don't want these events to be reported, so go set the ShouldReportStop here: 3411 m_process->GetThreadList().SetShouldReportStop (eVoteNo); 3412 3413 if (m_exec_count > 0) 3414 { 3415 --m_exec_count; 3416 3417 if (log) 3418 log->Printf ("Process::AttachCompletionHandler::%s state %s: reduced remaining exec count to %" PRIu32 ", requesting resume", __FUNCTION__, StateAsCString(state), m_exec_count); 3419 3420 RequestResume(); 3421 return eEventActionRetry; 3422 } 3423 else 3424 { 3425 if (log) 3426 log->Printf ("Process::AttachCompletionHandler::%s state %s: no more execs expected to start, continuing with attach", __FUNCTION__, StateAsCString(state)); 3427 3428 m_process->CompleteAttach (); 3429 return eEventActionSuccess; 3430 } 3431 } 3432 break; 3433 3434 default: 3435 case eStateExited: 3436 case eStateInvalid: 3437 break; 3438 } 3439 3440 m_exit_string.assign ("No valid Process"); 3441 return eEventActionExit; 3442 } 3443 3444 Process::NextEventAction::EventActionResult 3445 Process::AttachCompletionHandler::HandleBeingInterrupted() 3446 { 3447 return eEventActionSuccess; 3448 } 3449 3450 const char * 3451 Process::AttachCompletionHandler::GetExitString () 3452 { 3453 return m_exit_string.c_str(); 3454 } 3455 3456 Listener & 3457 ProcessAttachInfo::GetListenerForProcess (Debugger &debugger) 3458 { 3459 if (m_listener_sp) 3460 return *m_listener_sp; 3461 else 3462 return debugger.GetListener(); 3463 } 3464 3465 Error 3466 Process::Attach (ProcessAttachInfo &attach_info) 3467 { 3468 m_abi_sp.reset(); 3469 m_process_input_reader.reset(); 3470 m_dyld_ap.reset(); 3471 m_jit_loaders_ap.reset(); 3472 m_system_runtime_ap.reset(); 3473 m_os_ap.reset(); 3474 m_stop_info_override_callback = NULL; 3475 3476 lldb::pid_t attach_pid = attach_info.GetProcessID(); 3477 Error error; 3478 if (attach_pid == LLDB_INVALID_PROCESS_ID) 3479 { 3480 char process_name[PATH_MAX]; 3481 3482 if (attach_info.GetExecutableFile().GetPath (process_name, sizeof(process_name))) 3483 { 3484 const bool wait_for_launch = attach_info.GetWaitForLaunch(); 3485 3486 if (wait_for_launch) 3487 { 3488 error = WillAttachToProcessWithName(process_name, wait_for_launch); 3489 if (error.Success()) 3490 { 3491 if (m_public_run_lock.TrySetRunning()) 3492 { 3493 m_should_detach = true; 3494 const bool restarted = false; 3495 SetPublicState (eStateAttaching, restarted); 3496 // Now attach using these arguments. 3497 error = DoAttachToProcessWithName (process_name, attach_info); 3498 } 3499 else 3500 { 3501 // This shouldn't happen 3502 error.SetErrorString("failed to acquire process run lock"); 3503 } 3504 3505 if (error.Fail()) 3506 { 3507 if (GetID() != LLDB_INVALID_PROCESS_ID) 3508 { 3509 SetID (LLDB_INVALID_PROCESS_ID); 3510 if (error.AsCString() == NULL) 3511 error.SetErrorString("attach failed"); 3512 3513 SetExitStatus(-1, error.AsCString()); 3514 } 3515 } 3516 else 3517 { 3518 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3519 StartPrivateStateThread(); 3520 } 3521 return error; 3522 } 3523 } 3524 else 3525 { 3526 ProcessInstanceInfoList process_infos; 3527 PlatformSP platform_sp (GetTarget().GetPlatform ()); 3528 3529 if (platform_sp) 3530 { 3531 ProcessInstanceInfoMatch match_info; 3532 match_info.GetProcessInfo() = attach_info; 3533 match_info.SetNameMatchType (eNameMatchEquals); 3534 platform_sp->FindProcesses (match_info, process_infos); 3535 const uint32_t num_matches = process_infos.GetSize(); 3536 if (num_matches == 1) 3537 { 3538 attach_pid = process_infos.GetProcessIDAtIndex(0); 3539 // Fall through and attach using the above process ID 3540 } 3541 else 3542 { 3543 match_info.GetProcessInfo().GetExecutableFile().GetPath (process_name, sizeof(process_name)); 3544 if (num_matches > 1) 3545 { 3546 StreamString s; 3547 ProcessInstanceInfo::DumpTableHeader (s, platform_sp.get(), true, false); 3548 for (size_t i = 0; i < num_matches; i++) 3549 { 3550 process_infos.GetProcessInfoAtIndex(i).DumpAsTableRow(s, platform_sp.get(), true, false); 3551 } 3552 error.SetErrorStringWithFormat ("more than one process named %s:\n%s", 3553 process_name, 3554 s.GetData()); 3555 } 3556 else 3557 error.SetErrorStringWithFormat ("could not find a process named %s", process_name); 3558 } 3559 } 3560 else 3561 { 3562 error.SetErrorString ("invalid platform, can't find processes by name"); 3563 return error; 3564 } 3565 } 3566 } 3567 else 3568 { 3569 error.SetErrorString ("invalid process name"); 3570 } 3571 } 3572 3573 if (attach_pid != LLDB_INVALID_PROCESS_ID) 3574 { 3575 error = WillAttachToProcessWithID(attach_pid); 3576 if (error.Success()) 3577 { 3578 3579 if (m_public_run_lock.TrySetRunning()) 3580 { 3581 // Now attach using these arguments. 3582 m_should_detach = true; 3583 const bool restarted = false; 3584 SetPublicState (eStateAttaching, restarted); 3585 error = DoAttachToProcessWithID (attach_pid, attach_info); 3586 } 3587 else 3588 { 3589 // This shouldn't happen 3590 error.SetErrorString("failed to acquire process run lock"); 3591 } 3592 3593 if (error.Success()) 3594 { 3595 3596 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3597 StartPrivateStateThread(); 3598 } 3599 else 3600 { 3601 if (GetID() != LLDB_INVALID_PROCESS_ID) 3602 SetID (LLDB_INVALID_PROCESS_ID); 3603 3604 const char *error_string = error.AsCString(); 3605 if (error_string == NULL) 3606 error_string = "attach failed"; 3607 3608 SetExitStatus(-1, error_string); 3609 } 3610 } 3611 } 3612 return error; 3613 } 3614 3615 void 3616 Process::CompleteAttach () 3617 { 3618 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3619 if (log) 3620 log->Printf ("Process::%s()", __FUNCTION__); 3621 3622 // Let the process subclass figure out at much as it can about the process 3623 // before we go looking for a dynamic loader plug-in. 3624 ArchSpec process_arch; 3625 DidAttach(process_arch); 3626 3627 if (process_arch.IsValid()) 3628 { 3629 GetTarget().SetArchitecture(process_arch); 3630 if (log) 3631 { 3632 const char *triple_str = process_arch.GetTriple().getTriple().c_str (); 3633 log->Printf ("Process::%s replacing process architecture with DidAttach() architecture: %s", 3634 __FUNCTION__, 3635 triple_str ? triple_str : "<null>"); 3636 } 3637 } 3638 3639 // We just attached. If we have a platform, ask it for the process architecture, and if it isn't 3640 // the same as the one we've already set, switch architectures. 3641 PlatformSP platform_sp (GetTarget().GetPlatform ()); 3642 assert (platform_sp.get()); 3643 if (platform_sp) 3644 { 3645 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 3646 if (target_arch.IsValid() && !platform_sp->IsCompatibleArchitecture (target_arch, false, NULL)) 3647 { 3648 ArchSpec platform_arch; 3649 platform_sp = platform_sp->GetPlatformForArchitecture (target_arch, &platform_arch); 3650 if (platform_sp) 3651 { 3652 GetTarget().SetPlatform (platform_sp); 3653 GetTarget().SetArchitecture(platform_arch); 3654 if (log) 3655 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 ()); 3656 } 3657 } 3658 else if (!process_arch.IsValid()) 3659 { 3660 ProcessInstanceInfo process_info; 3661 platform_sp->GetProcessInfo (GetID(), process_info); 3662 const ArchSpec &process_arch = process_info.GetArchitecture(); 3663 if (process_arch.IsValid() && !GetTarget().GetArchitecture().IsExactMatch(process_arch)) 3664 { 3665 GetTarget().SetArchitecture (process_arch); 3666 if (log) 3667 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 ()); 3668 } 3669 } 3670 } 3671 3672 // We have completed the attach, now it is time to find the dynamic loader 3673 // plug-in 3674 DynamicLoader *dyld = GetDynamicLoader (); 3675 if (dyld) 3676 { 3677 dyld->DidAttach(); 3678 if (log) 3679 { 3680 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3681 log->Printf ("Process::%s after DynamicLoader::DidAttach(), target executable is %s (using %s plugin)", 3682 __FUNCTION__, 3683 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>", 3684 dyld->GetPluginName().AsCString ("<unnamed>")); 3685 } 3686 } 3687 3688 GetJITLoaders().DidAttach(); 3689 3690 SystemRuntime *system_runtime = GetSystemRuntime (); 3691 if (system_runtime) 3692 { 3693 system_runtime->DidAttach(); 3694 if (log) 3695 { 3696 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3697 log->Printf ("Process::%s after SystemRuntime::DidAttach(), target executable is %s (using %s plugin)", 3698 __FUNCTION__, 3699 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>", 3700 system_runtime->GetPluginName().AsCString("<unnamed>")); 3701 } 3702 } 3703 3704 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3705 // Figure out which one is the executable, and set that in our target: 3706 const ModuleList &target_modules = GetTarget().GetImages(); 3707 Mutex::Locker modules_locker(target_modules.GetMutex()); 3708 size_t num_modules = target_modules.GetSize(); 3709 ModuleSP new_executable_module_sp; 3710 3711 for (size_t i = 0; i < num_modules; i++) 3712 { 3713 ModuleSP module_sp (target_modules.GetModuleAtIndexUnlocked (i)); 3714 if (module_sp && module_sp->IsExecutable()) 3715 { 3716 if (GetTarget().GetExecutableModulePointer() != module_sp.get()) 3717 new_executable_module_sp = module_sp; 3718 break; 3719 } 3720 } 3721 if (new_executable_module_sp) 3722 { 3723 GetTarget().SetExecutableModule (new_executable_module_sp, false); 3724 if (log) 3725 { 3726 ModuleSP exe_module_sp = GetTarget().GetExecutableModule (); 3727 log->Printf ("Process::%s after looping through modules, target executable is %s", 3728 __FUNCTION__, 3729 exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str () : "<none>"); 3730 } 3731 } 3732 3733 m_stop_info_override_callback = process_arch.GetStopInfoOverrideCallback(); 3734 } 3735 3736 Error 3737 Process::ConnectRemote (Stream *strm, const char *remote_url) 3738 { 3739 m_abi_sp.reset(); 3740 m_process_input_reader.reset(); 3741 3742 // Find the process and its architecture. Make sure it matches the architecture 3743 // of the current Target, and if not adjust it. 3744 3745 Error error (DoConnectRemote (strm, remote_url)); 3746 if (error.Success()) 3747 { 3748 if (GetID() != LLDB_INVALID_PROCESS_ID) 3749 { 3750 EventSP event_sp; 3751 StateType state = WaitForProcessStopPrivate(NULL, event_sp); 3752 3753 if (state == eStateStopped || state == eStateCrashed) 3754 { 3755 // If we attached and actually have a process on the other end, then 3756 // this ended up being the equivalent of an attach. 3757 CompleteAttach (); 3758 3759 // This delays passing the stopped event to listeners till 3760 // CompleteAttach gets a chance to complete... 3761 HandlePrivateEvent (event_sp); 3762 3763 } 3764 } 3765 3766 if (PrivateStateThreadIsValid ()) 3767 ResumePrivateStateThread (); 3768 else 3769 StartPrivateStateThread (); 3770 } 3771 return error; 3772 } 3773 3774 Error 3775 Process::PrivateResume () 3776 { 3777 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_STEP)); 3778 if (log) 3779 log->Printf("Process::PrivateResume() m_stop_id = %u, public state: %s private state: %s", 3780 m_mod_id.GetStopID(), 3781 StateAsCString(m_public_state.GetValue()), 3782 StateAsCString(m_private_state.GetValue())); 3783 3784 Error error (WillResume()); 3785 // Tell the process it is about to resume before the thread list 3786 if (error.Success()) 3787 { 3788 // Now let the thread list know we are about to resume so it 3789 // can let all of our threads know that they are about to be 3790 // resumed. Threads will each be called with 3791 // Thread::WillResume(StateType) where StateType contains the state 3792 // that they are supposed to have when the process is resumed 3793 // (suspended/running/stepping). Threads should also check 3794 // their resume signal in lldb::Thread::GetResumeSignal() 3795 // to see if they are supposed to start back up with a signal. 3796 if (m_thread_list.WillResume()) 3797 { 3798 // Last thing, do the PreResumeActions. 3799 if (!RunPreResumeActions()) 3800 { 3801 error.SetErrorStringWithFormat ("Process::PrivateResume PreResumeActions failed, not resuming."); 3802 } 3803 else 3804 { 3805 m_mod_id.BumpResumeID(); 3806 error = DoResume(); 3807 if (error.Success()) 3808 { 3809 DidResume(); 3810 m_thread_list.DidResume(); 3811 if (log) 3812 log->Printf ("Process thinks the process has resumed."); 3813 } 3814 } 3815 } 3816 else 3817 { 3818 // Somebody wanted to run without running (e.g. we were faking a step from one frame of a set of inlined 3819 // frames that share the same PC to another.) So generate a continue & a stopped event, 3820 // and let the world handle them. 3821 if (log) 3822 log->Printf ("Process::PrivateResume() asked to simulate a start & stop."); 3823 3824 SetPrivateState(eStateRunning); 3825 SetPrivateState(eStateStopped); 3826 } 3827 } 3828 else if (log) 3829 log->Printf ("Process::PrivateResume() got an error \"%s\".", error.AsCString("<unknown error>")); 3830 return error; 3831 } 3832 3833 Error 3834 Process::Halt (bool clear_thread_plans) 3835 { 3836 // Don't clear the m_clear_thread_plans_on_stop, only set it to true if 3837 // in case it was already set and some thread plan logic calls halt on its 3838 // own. 3839 m_clear_thread_plans_on_stop |= clear_thread_plans; 3840 3841 // First make sure we aren't in the middle of handling an event, or we might restart. This is pretty weak, since 3842 // we could just straightaway get another event. It just narrows the window... 3843 m_currently_handling_event.WaitForValueEqualTo(false); 3844 3845 3846 // Pause our private state thread so we can ensure no one else eats 3847 // the stop event out from under us. 3848 Listener halt_listener ("lldb.process.halt_listener"); 3849 HijackPrivateProcessEvents(&halt_listener); 3850 3851 EventSP event_sp; 3852 Error error (WillHalt()); 3853 3854 bool restored_process_events = false; 3855 if (error.Success()) 3856 { 3857 3858 bool caused_stop = false; 3859 3860 // Ask the process subclass to actually halt our process 3861 error = DoHalt(caused_stop); 3862 if (error.Success()) 3863 { 3864 if (m_public_state.GetValue() == eStateAttaching) 3865 { 3866 // Don't hijack and eat the eStateExited as the code that was doing 3867 // the attach will be waiting for this event... 3868 RestorePrivateProcessEvents(); 3869 restored_process_events = true; 3870 SetExitStatus(SIGKILL, "Cancelled async attach."); 3871 Destroy (false); 3872 } 3873 else 3874 { 3875 // If "caused_stop" is true, then DoHalt stopped the process. If 3876 // "caused_stop" is false, the process was already stopped. 3877 // If the DoHalt caused the process to stop, then we want to catch 3878 // this event and set the interrupted bool to true before we pass 3879 // this along so clients know that the process was interrupted by 3880 // a halt command. 3881 if (caused_stop) 3882 { 3883 // Wait for 1 second for the process to stop. 3884 TimeValue timeout_time; 3885 timeout_time = TimeValue::Now(); 3886 timeout_time.OffsetWithSeconds(10); 3887 bool got_event = halt_listener.WaitForEvent (&timeout_time, event_sp); 3888 StateType state = ProcessEventData::GetStateFromEvent(event_sp.get()); 3889 3890 if (!got_event || state == eStateInvalid) 3891 { 3892 // We timeout out and didn't get a stop event... 3893 error.SetErrorStringWithFormat ("Halt timed out. State = %s", StateAsCString(GetState())); 3894 } 3895 else 3896 { 3897 if (StateIsStoppedState (state, false)) 3898 { 3899 // We caused the process to interrupt itself, so mark this 3900 // as such in the stop event so clients can tell an interrupted 3901 // process from a natural stop 3902 ProcessEventData::SetInterruptedInEvent (event_sp.get(), true); 3903 } 3904 else 3905 { 3906 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3907 if (log) 3908 log->Printf("Process::Halt() failed to stop, state is: %s", StateAsCString(state)); 3909 error.SetErrorString ("Did not get stopped event after halt."); 3910 } 3911 } 3912 } 3913 DidHalt(); 3914 } 3915 } 3916 } 3917 // Resume our private state thread before we post the event (if any) 3918 if (!restored_process_events) 3919 RestorePrivateProcessEvents(); 3920 3921 // Post any event we might have consumed. If all goes well, we will have 3922 // stopped the process, intercepted the event and set the interrupted 3923 // bool in the event. Post it to the private event queue and that will end up 3924 // correctly setting the state. 3925 if (event_sp) 3926 m_private_state_broadcaster.BroadcastEvent(event_sp); 3927 3928 return error; 3929 } 3930 3931 Error 3932 Process::StopForDestroyOrDetach(lldb::EventSP &exit_event_sp) 3933 { 3934 Error error; 3935 if (m_public_state.GetValue() == eStateRunning) 3936 { 3937 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3938 if (log) 3939 log->Printf("Process::%s() About to stop.", __FUNCTION__); 3940 3941 ListenerSP listener_sp (new Listener("lldb.Process.StopForDestroyOrDetach.hijack")); 3942 HijackProcessEvents(listener_sp.get()); 3943 3944 SendAsyncInterrupt(); 3945 3946 // Consume the interrupt event. 3947 TimeValue timeout (TimeValue::Now()); 3948 timeout.OffsetWithSeconds(10); 3949 3950 StateType state = WaitForProcessToStop (&timeout, &exit_event_sp, true, listener_sp.get()); 3951 3952 RestoreProcessEvents(); 3953 3954 // If the process exited while we were waiting for it to stop, put the exited event into 3955 // the shared pointer passed in and return. Our caller doesn't need to do anything else, since 3956 // they don't have a process anymore... 3957 3958 if (state == eStateExited || m_private_state.GetValue() == eStateExited) 3959 { 3960 if (log) 3961 log->Printf("Process::%s() Process exited while waiting to stop.", __FUNCTION__); 3962 return error; 3963 } 3964 else 3965 exit_event_sp.reset(); // It is ok to consume any non-exit stop events 3966 3967 if (state != eStateStopped) 3968 { 3969 if (log) 3970 log->Printf("Process::%s() failed to stop, state is: %s", __FUNCTION__, StateAsCString(state)); 3971 // If we really couldn't stop the process then we should just error out here, but if the 3972 // lower levels just bobbled sending the event and we really are stopped, then continue on. 3973 StateType private_state = m_private_state.GetValue(); 3974 if (private_state != eStateStopped) 3975 { 3976 return error; 3977 } 3978 } 3979 } 3980 return error; 3981 } 3982 3983 Error 3984 Process::Detach (bool keep_stopped) 3985 { 3986 EventSP exit_event_sp; 3987 Error error; 3988 m_destroy_in_process = true; 3989 3990 error = WillDetach(); 3991 3992 if (error.Success()) 3993 { 3994 if (DetachRequiresHalt()) 3995 { 3996 error = StopForDestroyOrDetach (exit_event_sp); 3997 if (!error.Success()) 3998 { 3999 m_destroy_in_process = false; 4000 return error; 4001 } 4002 else if (exit_event_sp) 4003 { 4004 // We shouldn't need to do anything else here. There's no process left to detach from... 4005 StopPrivateStateThread(); 4006 m_destroy_in_process = false; 4007 return error; 4008 } 4009 } 4010 4011 m_thread_list.DiscardThreadPlans(); 4012 DisableAllBreakpointSites(); 4013 4014 error = DoDetach(keep_stopped); 4015 if (error.Success()) 4016 { 4017 DidDetach(); 4018 StopPrivateStateThread(); 4019 } 4020 else 4021 { 4022 return error; 4023 } 4024 } 4025 m_destroy_in_process = false; 4026 4027 // If we exited when we were waiting for a process to stop, then 4028 // forward the event here so we don't lose the event 4029 if (exit_event_sp) 4030 { 4031 // Directly broadcast our exited event because we shut down our 4032 // private state thread above 4033 BroadcastEvent(exit_event_sp); 4034 } 4035 4036 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 4037 // the last events through the event system, in which case we might strand the write lock. Unlock 4038 // it here so when we do to tear down the process we don't get an error destroying the lock. 4039 4040 m_public_run_lock.SetStopped(); 4041 return error; 4042 } 4043 4044 Error 4045 Process::Destroy (bool force_kill) 4046 { 4047 4048 // Tell ourselves we are in the process of destroying the process, so that we don't do any unnecessary work 4049 // that might hinder the destruction. Remember to set this back to false when we are done. That way if the attempt 4050 // failed and the process stays around for some reason it won't be in a confused state. 4051 4052 if (force_kill) 4053 m_should_detach = false; 4054 4055 if (GetShouldDetach()) 4056 { 4057 // FIXME: This will have to be a process setting: 4058 bool keep_stopped = false; 4059 Detach(keep_stopped); 4060 } 4061 4062 m_destroy_in_process = true; 4063 4064 Error error (WillDestroy()); 4065 if (error.Success()) 4066 { 4067 EventSP exit_event_sp; 4068 if (DestroyRequiresHalt()) 4069 { 4070 error = StopForDestroyOrDetach(exit_event_sp); 4071 } 4072 4073 if (m_public_state.GetValue() != eStateRunning) 4074 { 4075 // Ditch all thread plans, and remove all our breakpoints: in case we have to restart the target to 4076 // kill it, we don't want it hitting a breakpoint... 4077 // Only do this if we've stopped, however, since if we didn't manage to halt it above, then 4078 // we're not going to have much luck doing this now. 4079 m_thread_list.DiscardThreadPlans(); 4080 DisableAllBreakpointSites(); 4081 } 4082 4083 error = DoDestroy(); 4084 if (error.Success()) 4085 { 4086 DidDestroy(); 4087 StopPrivateStateThread(); 4088 } 4089 m_stdio_communication.Disconnect(); 4090 m_stdio_communication.StopReadThread(); 4091 m_stdin_forward = false; 4092 4093 if (m_process_input_reader) 4094 { 4095 m_process_input_reader->SetIsDone(true); 4096 m_process_input_reader->Cancel(); 4097 m_process_input_reader.reset(); 4098 } 4099 4100 // If we exited when we were waiting for a process to stop, then 4101 // forward the event here so we don't lose the event 4102 if (exit_event_sp) 4103 { 4104 // Directly broadcast our exited event because we shut down our 4105 // private state thread above 4106 BroadcastEvent(exit_event_sp); 4107 } 4108 4109 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 4110 // the last events through the event system, in which case we might strand the write lock. Unlock 4111 // it here so when we do to tear down the process we don't get an error destroying the lock. 4112 m_public_run_lock.SetStopped(); 4113 } 4114 4115 m_destroy_in_process = false; 4116 4117 return error; 4118 } 4119 4120 Error 4121 Process::Signal (int signal) 4122 { 4123 Error error (WillSignal()); 4124 if (error.Success()) 4125 { 4126 error = DoSignal(signal); 4127 if (error.Success()) 4128 DidSignal(); 4129 } 4130 return error; 4131 } 4132 4133 void 4134 Process::SetUnixSignals(UnixSignalsSP &&signals_sp) 4135 { 4136 assert (signals_sp && "null signals_sp"); 4137 m_unix_signals_sp = signals_sp; 4138 } 4139 4140 const lldb::UnixSignalsSP & 4141 Process::GetUnixSignals () 4142 { 4143 assert (m_unix_signals_sp && "null m_unix_signals_sp"); 4144 return m_unix_signals_sp; 4145 } 4146 4147 lldb::ByteOrder 4148 Process::GetByteOrder () const 4149 { 4150 return GetTarget().GetArchitecture().GetByteOrder(); 4151 } 4152 4153 uint32_t 4154 Process::GetAddressByteSize () const 4155 { 4156 return GetTarget().GetArchitecture().GetAddressByteSize(); 4157 } 4158 4159 bool 4160 Process::ShouldBroadcastEvent (Event *event_ptr) 4161 { 4162 const StateType state = Process::ProcessEventData::GetStateFromEvent (event_ptr); 4163 bool return_value = true; 4164 Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_EVENTS | LIBLLDB_LOG_PROCESS)); 4165 4166 switch (state) 4167 { 4168 case eStateDetached: 4169 case eStateExited: 4170 case eStateUnloaded: 4171 m_stdio_communication.SynchronizeWithReadThread(); 4172 m_stdio_communication.Disconnect(); 4173 m_stdio_communication.StopReadThread(); 4174 m_stdin_forward = false; 4175 4176 // fall-through 4177 case eStateConnected: 4178 case eStateAttaching: 4179 case eStateLaunching: 4180 // These events indicate changes in the state of the debugging session, always report them. 4181 return_value = true; 4182 break; 4183 case eStateInvalid: 4184 // We stopped for no apparent reason, don't report it. 4185 return_value = false; 4186 break; 4187 case eStateRunning: 4188 case eStateStepping: 4189 // If we've started the target running, we handle the cases where we 4190 // are already running and where there is a transition from stopped to 4191 // running differently. 4192 // running -> running: Automatically suppress extra running events 4193 // stopped -> running: Report except when there is one or more no votes 4194 // and no yes votes. 4195 SynchronouslyNotifyStateChanged (state); 4196 if (m_force_next_event_delivery) 4197 return_value = true; 4198 else 4199 { 4200 switch (m_last_broadcast_state) 4201 { 4202 case eStateRunning: 4203 case eStateStepping: 4204 // We always suppress multiple runnings with no PUBLIC stop in between. 4205 return_value = false; 4206 break; 4207 default: 4208 // TODO: make this work correctly. For now always report 4209 // run if we aren't running so we don't miss any running 4210 // events. If I run the lldb/test/thread/a.out file and 4211 // break at main.cpp:58, run and hit the breakpoints on 4212 // multiple threads, then somehow during the stepping over 4213 // of all breakpoints no run gets reported. 4214 4215 // This is a transition from stop to run. 4216 switch (m_thread_list.ShouldReportRun (event_ptr)) 4217 { 4218 case eVoteYes: 4219 case eVoteNoOpinion: 4220 return_value = true; 4221 break; 4222 case eVoteNo: 4223 return_value = false; 4224 break; 4225 } 4226 break; 4227 } 4228 } 4229 break; 4230 case eStateStopped: 4231 case eStateCrashed: 4232 case eStateSuspended: 4233 { 4234 // We've stopped. First see if we're going to restart the target. 4235 // If we are going to stop, then we always broadcast the event. 4236 // If we aren't going to stop, let the thread plans decide if we're going to report this event. 4237 // If no thread has an opinion, we don't report it. 4238 4239 m_stdio_communication.SynchronizeWithReadThread(); 4240 RefreshStateAfterStop (); 4241 if (ProcessEventData::GetInterruptedFromEvent (event_ptr)) 4242 { 4243 if (log) 4244 log->Printf ("Process::ShouldBroadcastEvent (%p) stopped due to an interrupt, state: %s", 4245 static_cast<void*>(event_ptr), 4246 StateAsCString(state)); 4247 // Even though we know we are going to stop, we should let the threads have a look at the stop, 4248 // so they can properly set their state. 4249 m_thread_list.ShouldStop (event_ptr); 4250 return_value = true; 4251 } 4252 else 4253 { 4254 bool was_restarted = ProcessEventData::GetRestartedFromEvent (event_ptr); 4255 bool should_resume = false; 4256 4257 // It makes no sense to ask "ShouldStop" if we've already been restarted... 4258 // Asking the thread list is also not likely to go well, since we are running again. 4259 // So in that case just report the event. 4260 4261 if (!was_restarted) 4262 should_resume = m_thread_list.ShouldStop (event_ptr) == false; 4263 4264 if (was_restarted || should_resume || m_resume_requested) 4265 { 4266 Vote stop_vote = m_thread_list.ShouldReportStop (event_ptr); 4267 if (log) 4268 log->Printf ("Process::ShouldBroadcastEvent: should_stop: %i state: %s was_restarted: %i stop_vote: %d.", 4269 should_resume, StateAsCString(state), 4270 was_restarted, stop_vote); 4271 4272 switch (stop_vote) 4273 { 4274 case eVoteYes: 4275 return_value = true; 4276 break; 4277 case eVoteNoOpinion: 4278 case eVoteNo: 4279 return_value = false; 4280 break; 4281 } 4282 4283 if (!was_restarted) 4284 { 4285 if (log) 4286 log->Printf ("Process::ShouldBroadcastEvent (%p) Restarting process from state: %s", 4287 static_cast<void*>(event_ptr), 4288 StateAsCString(state)); 4289 ProcessEventData::SetRestartedInEvent(event_ptr, true); 4290 PrivateResume (); 4291 } 4292 } 4293 else 4294 { 4295 return_value = true; 4296 SynchronouslyNotifyStateChanged (state); 4297 } 4298 } 4299 } 4300 break; 4301 } 4302 4303 // Forcing the next event delivery is a one shot deal. So reset it here. 4304 m_force_next_event_delivery = false; 4305 4306 // We do some coalescing of events (for instance two consecutive running events get coalesced.) 4307 // But we only coalesce against events we actually broadcast. So we use m_last_broadcast_state 4308 // to track that. NB - you can't use "m_public_state.GetValue()" for that purpose, as was originally done, 4309 // because the PublicState reflects the last event pulled off the queue, and there may be several 4310 // events stacked up on the queue unserviced. So the PublicState may not reflect the last broadcasted event 4311 // yet. m_last_broadcast_state gets updated here. 4312 4313 if (return_value) 4314 m_last_broadcast_state = state; 4315 4316 if (log) 4317 log->Printf ("Process::ShouldBroadcastEvent (%p) => new state: %s, last broadcast state: %s - %s", 4318 static_cast<void*>(event_ptr), StateAsCString(state), 4319 StateAsCString(m_last_broadcast_state), 4320 return_value ? "YES" : "NO"); 4321 return return_value; 4322 } 4323 4324 bool 4325 Process::StartPrivateStateThread (bool is_secondary_thread) 4326 { 4327 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EVENTS)); 4328 4329 bool already_running = PrivateStateThreadIsValid (); 4330 if (log) 4331 log->Printf ("Process::%s()%s ", __FUNCTION__, already_running ? " already running" : " starting private state thread"); 4332 4333 if (!is_secondary_thread && already_running) 4334 return true; 4335 4336 // Create a thread that watches our internal state and controls which 4337 // events make it to clients (into the DCProcess event queue). 4338 char thread_name[1024]; 4339 4340 if (HostInfo::GetMaxThreadNameLength() <= 30) 4341 { 4342 // On platforms with abbreviated thread name lengths, choose thread names that fit within the limit. 4343 if (already_running) 4344 snprintf(thread_name, sizeof(thread_name), "intern-state-OV"); 4345 else 4346 snprintf(thread_name, sizeof(thread_name), "intern-state"); 4347 } 4348 else 4349 { 4350 if (already_running) 4351 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state-override(pid=%" PRIu64 ")>", GetID()); 4352 else 4353 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state(pid=%" PRIu64 ")>", GetID()); 4354 } 4355 4356 // Create the private state thread, and start it running. 4357 PrivateStateThreadArgs args = {this, is_secondary_thread}; 4358 m_private_state_thread = ThreadLauncher::LaunchThread(thread_name, Process::PrivateStateThread, (void *) &args, NULL); 4359 if (m_private_state_thread.IsJoinable()) 4360 { 4361 ResumePrivateStateThread(); 4362 return true; 4363 } 4364 else 4365 return false; 4366 } 4367 4368 void 4369 Process::PausePrivateStateThread () 4370 { 4371 ControlPrivateStateThread (eBroadcastInternalStateControlPause); 4372 } 4373 4374 void 4375 Process::ResumePrivateStateThread () 4376 { 4377 ControlPrivateStateThread (eBroadcastInternalStateControlResume); 4378 } 4379 4380 void 4381 Process::StopPrivateStateThread () 4382 { 4383 if (PrivateStateThreadIsValid ()) 4384 ControlPrivateStateThread (eBroadcastInternalStateControlStop); 4385 else 4386 { 4387 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4388 if (log) 4389 log->Printf ("Went to stop the private state thread, but it was already invalid."); 4390 } 4391 } 4392 4393 void 4394 Process::ControlPrivateStateThread (uint32_t signal) 4395 { 4396 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4397 4398 assert (signal == eBroadcastInternalStateControlStop || 4399 signal == eBroadcastInternalStateControlPause || 4400 signal == eBroadcastInternalStateControlResume); 4401 4402 if (log) 4403 log->Printf ("Process::%s (signal = %d)", __FUNCTION__, signal); 4404 4405 // Signal the private state thread. First we should copy this is case the 4406 // thread starts exiting since the private state thread will NULL this out 4407 // when it exits 4408 HostThread private_state_thread(m_private_state_thread); 4409 if (private_state_thread.IsJoinable()) 4410 { 4411 TimeValue timeout_time; 4412 bool timed_out; 4413 4414 m_private_state_control_broadcaster.BroadcastEvent (signal, NULL); 4415 4416 timeout_time = TimeValue::Now(); 4417 timeout_time.OffsetWithSeconds(2); 4418 if (log) 4419 log->Printf ("Sending control event of type: %d.", signal); 4420 m_private_state_control_wait.WaitForValueEqualTo (true, &timeout_time, &timed_out); 4421 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4422 4423 if (signal == eBroadcastInternalStateControlStop) 4424 { 4425 if (timed_out) 4426 { 4427 Error error = private_state_thread.Cancel(); 4428 if (log) 4429 log->Printf ("Timed out responding to the control event, cancel got error: \"%s\".", error.AsCString()); 4430 } 4431 else 4432 { 4433 if (log) 4434 log->Printf ("The control event killed the private state thread without having to cancel."); 4435 } 4436 4437 thread_result_t result = NULL; 4438 private_state_thread.Join(&result); 4439 m_private_state_thread.Reset(); 4440 } 4441 } 4442 else 4443 { 4444 if (log) 4445 log->Printf ("Private state thread already dead, no need to signal it to stop."); 4446 } 4447 } 4448 4449 void 4450 Process::SendAsyncInterrupt () 4451 { 4452 if (PrivateStateThreadIsValid()) 4453 m_private_state_broadcaster.BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4454 else 4455 BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4456 } 4457 4458 void 4459 Process::HandlePrivateEvent (EventSP &event_sp) 4460 { 4461 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4462 m_resume_requested = false; 4463 4464 m_currently_handling_event.SetValue(true, eBroadcastNever); 4465 4466 const StateType new_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4467 4468 // First check to see if anybody wants a shot at this event: 4469 if (m_next_event_action_ap.get() != NULL) 4470 { 4471 NextEventAction::EventActionResult action_result = m_next_event_action_ap->PerformAction(event_sp); 4472 if (log) 4473 log->Printf ("Ran next event action, result was %d.", action_result); 4474 4475 switch (action_result) 4476 { 4477 case NextEventAction::eEventActionSuccess: 4478 SetNextEventAction(NULL); 4479 break; 4480 4481 case NextEventAction::eEventActionRetry: 4482 break; 4483 4484 case NextEventAction::eEventActionExit: 4485 // Handle Exiting Here. If we already got an exited event, 4486 // we should just propagate it. Otherwise, swallow this event, 4487 // and set our state to exit so the next event will kill us. 4488 if (new_state != eStateExited) 4489 { 4490 // FIXME: should cons up an exited event, and discard this one. 4491 SetExitStatus(0, m_next_event_action_ap->GetExitString()); 4492 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4493 SetNextEventAction(NULL); 4494 return; 4495 } 4496 SetNextEventAction(NULL); 4497 break; 4498 } 4499 } 4500 4501 // See if we should broadcast this state to external clients? 4502 const bool should_broadcast = ShouldBroadcastEvent (event_sp.get()); 4503 4504 if (should_broadcast) 4505 { 4506 const bool is_hijacked = IsHijackedForEvent(eBroadcastBitStateChanged); 4507 if (log) 4508 { 4509 log->Printf ("Process::%s (pid = %" PRIu64 ") broadcasting new state %s (old state %s) to %s", 4510 __FUNCTION__, 4511 GetID(), 4512 StateAsCString(new_state), 4513 StateAsCString (GetState ()), 4514 is_hijacked ? "hijacked" : "public"); 4515 } 4516 Process::ProcessEventData::SetUpdateStateOnRemoval(event_sp.get()); 4517 if (StateIsRunningState (new_state)) 4518 { 4519 // Only push the input handler if we aren't fowarding events, 4520 // as this means the curses GUI is in use... 4521 // Or don't push it if we are launching since it will come up stopped. 4522 if (!GetTarget().GetDebugger().IsForwardingEvents() && new_state != eStateLaunching && 4523 new_state != eStateAttaching) 4524 { 4525 PushProcessIOHandler (); 4526 m_iohandler_sync.SetValue(m_iohandler_sync.GetValue()+1, eBroadcastAlways); 4527 if (log) 4528 log->Printf("Process::%s updated m_iohandler_sync to %d", __FUNCTION__, m_iohandler_sync.GetValue()); 4529 } 4530 } 4531 else if (StateIsStoppedState(new_state, false)) 4532 { 4533 if (!Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 4534 { 4535 // If the lldb_private::Debugger is handling the events, we don't 4536 // want to pop the process IOHandler here, we want to do it when 4537 // we receive the stopped event so we can carefully control when 4538 // the process IOHandler is popped because when we stop we want to 4539 // display some text stating how and why we stopped, then maybe some 4540 // process/thread/frame info, and then we want the "(lldb) " prompt 4541 // to show up. If we pop the process IOHandler here, then we will 4542 // cause the command interpreter to become the top IOHandler after 4543 // the process pops off and it will update its prompt right away... 4544 // See the Debugger.cpp file where it calls the function as 4545 // "process_sp->PopProcessIOHandler()" to see where I am talking about. 4546 // Otherwise we end up getting overlapping "(lldb) " prompts and 4547 // garbled output. 4548 // 4549 // If we aren't handling the events in the debugger (which is indicated 4550 // by "m_target.GetDebugger().IsHandlingEvents()" returning false) or we 4551 // are hijacked, then we always pop the process IO handler manually. 4552 // Hijacking happens when the internal process state thread is running 4553 // thread plans, or when commands want to run in synchronous mode 4554 // and they call "process->WaitForProcessToStop()". An example of something 4555 // that will hijack the events is a simple expression: 4556 // 4557 // (lldb) expr (int)puts("hello") 4558 // 4559 // This will cause the internal process state thread to resume and halt 4560 // the process (and _it_ will hijack the eBroadcastBitStateChanged 4561 // events) and we do need the IO handler to be pushed and popped 4562 // correctly. 4563 4564 if (is_hijacked || GetTarget().GetDebugger().IsHandlingEvents() == false) 4565 PopProcessIOHandler (); 4566 } 4567 } 4568 4569 BroadcastEvent (event_sp); 4570 } 4571 else 4572 { 4573 if (log) 4574 { 4575 log->Printf ("Process::%s (pid = %" PRIu64 ") suppressing state %s (old state %s): should_broadcast == false", 4576 __FUNCTION__, 4577 GetID(), 4578 StateAsCString(new_state), 4579 StateAsCString (GetState ())); 4580 } 4581 } 4582 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4583 } 4584 4585 thread_result_t 4586 Process::PrivateStateThread (void *arg) 4587 { 4588 PrivateStateThreadArgs *real_args = static_cast<PrivateStateThreadArgs *> (arg); 4589 thread_result_t result = real_args->process->RunPrivateStateThread(real_args->is_secondary_thread); 4590 return result; 4591 } 4592 4593 thread_result_t 4594 Process::RunPrivateStateThread (bool is_secondary_thread) 4595 { 4596 bool control_only = true; 4597 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4598 4599 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4600 if (log) 4601 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread starting...", 4602 __FUNCTION__, static_cast<void*>(this), GetID()); 4603 4604 bool exit_now = false; 4605 while (!exit_now) 4606 { 4607 EventSP event_sp; 4608 WaitForEventsPrivate (NULL, event_sp, control_only); 4609 if (event_sp->BroadcasterIs(&m_private_state_control_broadcaster)) 4610 { 4611 if (log) 4612 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") got a control event: %d", 4613 __FUNCTION__, static_cast<void*>(this), GetID(), 4614 event_sp->GetType()); 4615 4616 switch (event_sp->GetType()) 4617 { 4618 case eBroadcastInternalStateControlStop: 4619 exit_now = true; 4620 break; // doing any internal state management below 4621 4622 case eBroadcastInternalStateControlPause: 4623 control_only = true; 4624 break; 4625 4626 case eBroadcastInternalStateControlResume: 4627 control_only = false; 4628 break; 4629 } 4630 4631 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4632 continue; 4633 } 4634 else if (event_sp->GetType() == eBroadcastBitInterrupt) 4635 { 4636 if (m_public_state.GetValue() == eStateAttaching) 4637 { 4638 if (log) 4639 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt while attaching - forwarding interrupt.", 4640 __FUNCTION__, static_cast<void*>(this), 4641 GetID()); 4642 BroadcastEvent (eBroadcastBitInterrupt, NULL); 4643 } 4644 else 4645 { 4646 if (log) 4647 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt - Halting.", 4648 __FUNCTION__, static_cast<void*>(this), 4649 GetID()); 4650 Halt(); 4651 } 4652 continue; 4653 } 4654 4655 const StateType internal_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4656 4657 if (internal_state != eStateInvalid) 4658 { 4659 if (m_clear_thread_plans_on_stop && 4660 StateIsStoppedState(internal_state, true)) 4661 { 4662 m_clear_thread_plans_on_stop = false; 4663 m_thread_list.DiscardThreadPlans(); 4664 } 4665 HandlePrivateEvent (event_sp); 4666 } 4667 4668 if (internal_state == eStateInvalid || 4669 internal_state == eStateExited || 4670 internal_state == eStateDetached ) 4671 { 4672 if (log) 4673 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") about to exit with internal state %s...", 4674 __FUNCTION__, static_cast<void*>(this), GetID(), 4675 StateAsCString(internal_state)); 4676 4677 break; 4678 } 4679 } 4680 4681 // Verify log is still enabled before attempting to write to it... 4682 if (log) 4683 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", 4684 __FUNCTION__, static_cast<void*>(this), GetID()); 4685 4686 // If we are a secondary thread, then the primary thread we are working for will have already 4687 // acquired the public_run_lock, and isn't done with what it was doing yet, so don't 4688 // try to change it on the way out. 4689 if (!is_secondary_thread) 4690 m_public_run_lock.SetStopped(); 4691 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4692 m_private_state_thread.Reset(); 4693 return NULL; 4694 } 4695 4696 //------------------------------------------------------------------ 4697 // Process Event Data 4698 //------------------------------------------------------------------ 4699 4700 Process::ProcessEventData::ProcessEventData () : 4701 EventData (), 4702 m_process_wp (), 4703 m_state (eStateInvalid), 4704 m_restarted (false), 4705 m_update_state (0), 4706 m_interrupted (false) 4707 { 4708 } 4709 4710 Process::ProcessEventData::ProcessEventData (const ProcessSP &process_sp, StateType state) : 4711 EventData (), 4712 m_process_wp (), 4713 m_state (state), 4714 m_restarted (false), 4715 m_update_state (0), 4716 m_interrupted (false) 4717 { 4718 if (process_sp) 4719 m_process_wp = process_sp; 4720 } 4721 4722 Process::ProcessEventData::~ProcessEventData() = default; 4723 4724 const ConstString & 4725 Process::ProcessEventData::GetFlavorString () 4726 { 4727 static ConstString g_flavor ("Process::ProcessEventData"); 4728 return g_flavor; 4729 } 4730 4731 const ConstString & 4732 Process::ProcessEventData::GetFlavor () const 4733 { 4734 return ProcessEventData::GetFlavorString (); 4735 } 4736 4737 void 4738 Process::ProcessEventData::DoOnRemoval (Event *event_ptr) 4739 { 4740 ProcessSP process_sp(m_process_wp.lock()); 4741 4742 if (!process_sp) 4743 return; 4744 4745 // This function gets called twice for each event, once when the event gets pulled 4746 // off of the private process event queue, and then any number of times, first when it gets pulled off of 4747 // the public event queue, then other times when we're pretending that this is where we stopped at the 4748 // end of expression evaluation. m_update_state is used to distinguish these 4749 // three cases; it is 0 when we're just pulling it off for private handling, 4750 // and > 1 for expression evaluation, and we don't want to do the breakpoint command handling then. 4751 if (m_update_state != 1) 4752 return; 4753 4754 process_sp->SetPublicState (m_state, Process::ProcessEventData::GetRestartedFromEvent(event_ptr)); 4755 4756 // If this is a halt event, even if the halt stopped with some reason other than a plain interrupt (e.g. we had 4757 // already stopped for a breakpoint when the halt request came through) don't do the StopInfo actions, as they may 4758 // end up restarting the process. 4759 if (m_interrupted) 4760 return; 4761 4762 // If we're stopped and haven't restarted, then do the StopInfo actions here: 4763 if (m_state == eStateStopped && ! m_restarted) 4764 { 4765 // Let process subclasses know we are about to do a public stop and 4766 // do anything they might need to in order to speed up register and 4767 // memory accesses. 4768 process_sp->WillPublicStop(); 4769 4770 ThreadList &curr_thread_list = process_sp->GetThreadList(); 4771 uint32_t num_threads = curr_thread_list.GetSize(); 4772 uint32_t idx; 4773 4774 // The actions might change one of the thread's stop_info's opinions about whether we should 4775 // stop the process, so we need to query that as we go. 4776 4777 // One other complication here, is that we try to catch any case where the target has run (except for expressions) 4778 // and immediately exit, but if we get that wrong (which is possible) then the thread list might have changed, and 4779 // that would cause our iteration here to crash. We could make a copy of the thread list, but we'd really like 4780 // 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 4781 // against this list & bag out if anything differs. 4782 std::vector<uint32_t> thread_index_array(num_threads); 4783 for (idx = 0; idx < num_threads; ++idx) 4784 thread_index_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetIndexID(); 4785 4786 // Use this to track whether we should continue from here. We will only continue the target running if 4787 // no thread says we should stop. Of course if some thread's PerformAction actually sets the target running, 4788 // then it doesn't matter what the other threads say... 4789 4790 bool still_should_stop = false; 4791 4792 // Sometimes - for instance if we have a bug in the stub we are talking to, we stop but no thread has a 4793 // valid stop reason. In that case we should just stop, because we have no way of telling what the right 4794 // thing to do is, and it's better to let the user decide than continue behind their backs. 4795 4796 bool does_anybody_have_an_opinion = false; 4797 4798 for (idx = 0; idx < num_threads; ++idx) 4799 { 4800 curr_thread_list = process_sp->GetThreadList(); 4801 if (curr_thread_list.GetSize() != num_threads) 4802 { 4803 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4804 if (log) 4805 log->Printf("Number of threads changed from %u to %u while processing event.", num_threads, curr_thread_list.GetSize()); 4806 break; 4807 } 4808 4809 lldb::ThreadSP thread_sp = curr_thread_list.GetThreadAtIndex(idx); 4810 4811 if (thread_sp->GetIndexID() != thread_index_array[idx]) 4812 { 4813 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4814 if (log) 4815 log->Printf("The thread at position %u changed from %u to %u while processing event.", 4816 idx, 4817 thread_index_array[idx], 4818 thread_sp->GetIndexID()); 4819 break; 4820 } 4821 4822 StopInfoSP stop_info_sp = thread_sp->GetStopInfo (); 4823 if (stop_info_sp && stop_info_sp->IsValid()) 4824 { 4825 does_anybody_have_an_opinion = true; 4826 bool this_thread_wants_to_stop; 4827 if (stop_info_sp->GetOverrideShouldStop()) 4828 { 4829 this_thread_wants_to_stop = stop_info_sp->GetOverriddenShouldStopValue(); 4830 } 4831 else 4832 { 4833 stop_info_sp->PerformAction(event_ptr); 4834 // The stop action might restart the target. If it does, then we want to mark that in the 4835 // event so that whoever is receiving it will know to wait for the running event and reflect 4836 // that state appropriately. 4837 // We also need to stop processing actions, since they aren't expecting the target to be running. 4838 4839 // FIXME: we might have run. 4840 if (stop_info_sp->HasTargetRunSinceMe()) 4841 { 4842 SetRestarted (true); 4843 break; 4844 } 4845 4846 this_thread_wants_to_stop = stop_info_sp->ShouldStop(event_ptr); 4847 } 4848 4849 if (still_should_stop == false) 4850 still_should_stop = this_thread_wants_to_stop; 4851 } 4852 } 4853 4854 if (!GetRestarted()) 4855 { 4856 if (!still_should_stop && does_anybody_have_an_opinion) 4857 { 4858 // We've been asked to continue, so do that here. 4859 SetRestarted(true); 4860 // Use the public resume method here, since this is just 4861 // extending a public resume. 4862 process_sp->PrivateResume(); 4863 } 4864 else 4865 { 4866 // If we didn't restart, run the Stop Hooks here: 4867 // They might also restart the target, so watch for that. 4868 process_sp->GetTarget().RunStopHooks(); 4869 if (process_sp->GetPrivateState() == eStateRunning) 4870 SetRestarted(true); 4871 } 4872 } 4873 } 4874 } 4875 4876 void 4877 Process::ProcessEventData::Dump (Stream *s) const 4878 { 4879 ProcessSP process_sp(m_process_wp.lock()); 4880 4881 if (process_sp) 4882 s->Printf(" process = %p (pid = %" PRIu64 "), ", 4883 static_cast<void*>(process_sp.get()), process_sp->GetID()); 4884 else 4885 s->PutCString(" process = NULL, "); 4886 4887 s->Printf("state = %s", StateAsCString(GetState())); 4888 } 4889 4890 const Process::ProcessEventData * 4891 Process::ProcessEventData::GetEventDataFromEvent (const Event *event_ptr) 4892 { 4893 if (event_ptr) 4894 { 4895 const EventData *event_data = event_ptr->GetData(); 4896 if (event_data && event_data->GetFlavor() == ProcessEventData::GetFlavorString()) 4897 return static_cast <const ProcessEventData *> (event_ptr->GetData()); 4898 } 4899 return NULL; 4900 } 4901 4902 ProcessSP 4903 Process::ProcessEventData::GetProcessFromEvent (const Event *event_ptr) 4904 { 4905 ProcessSP process_sp; 4906 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4907 if (data) 4908 process_sp = data->GetProcessSP(); 4909 return process_sp; 4910 } 4911 4912 StateType 4913 Process::ProcessEventData::GetStateFromEvent (const Event *event_ptr) 4914 { 4915 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4916 if (data == NULL) 4917 return eStateInvalid; 4918 else 4919 return data->GetState(); 4920 } 4921 4922 bool 4923 Process::ProcessEventData::GetRestartedFromEvent (const Event *event_ptr) 4924 { 4925 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4926 if (data == NULL) 4927 return false; 4928 else 4929 return data->GetRestarted(); 4930 } 4931 4932 void 4933 Process::ProcessEventData::SetRestartedInEvent (Event *event_ptr, bool new_value) 4934 { 4935 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4936 if (data != NULL) 4937 data->SetRestarted(new_value); 4938 } 4939 4940 size_t 4941 Process::ProcessEventData::GetNumRestartedReasons(const Event *event_ptr) 4942 { 4943 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4944 if (data != NULL) 4945 return data->GetNumRestartedReasons(); 4946 else 4947 return 0; 4948 } 4949 4950 const char * 4951 Process::ProcessEventData::GetRestartedReasonAtIndex(const Event *event_ptr, size_t idx) 4952 { 4953 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4954 if (data != NULL) 4955 return data->GetRestartedReasonAtIndex(idx); 4956 else 4957 return NULL; 4958 } 4959 4960 void 4961 Process::ProcessEventData::AddRestartedReason (Event *event_ptr, const char *reason) 4962 { 4963 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4964 if (data != NULL) 4965 data->AddRestartedReason(reason); 4966 } 4967 4968 bool 4969 Process::ProcessEventData::GetInterruptedFromEvent (const Event *event_ptr) 4970 { 4971 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4972 if (data == NULL) 4973 return false; 4974 else 4975 return data->GetInterrupted (); 4976 } 4977 4978 void 4979 Process::ProcessEventData::SetInterruptedInEvent (Event *event_ptr, bool new_value) 4980 { 4981 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4982 if (data != NULL) 4983 data->SetInterrupted(new_value); 4984 } 4985 4986 bool 4987 Process::ProcessEventData::SetUpdateStateOnRemoval (Event *event_ptr) 4988 { 4989 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4990 if (data) 4991 { 4992 data->SetUpdateStateOnRemoval(); 4993 return true; 4994 } 4995 return false; 4996 } 4997 4998 lldb::TargetSP 4999 Process::CalculateTarget () 5000 { 5001 return m_target_sp.lock(); 5002 } 5003 5004 void 5005 Process::CalculateExecutionContext (ExecutionContext &exe_ctx) 5006 { 5007 exe_ctx.SetTargetPtr (&GetTarget()); 5008 exe_ctx.SetProcessPtr (this); 5009 exe_ctx.SetThreadPtr(NULL); 5010 exe_ctx.SetFramePtr (NULL); 5011 } 5012 5013 //uint32_t 5014 //Process::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 5015 //{ 5016 // return 0; 5017 //} 5018 // 5019 //ArchSpec 5020 //Process::GetArchSpecForExistingProcess (lldb::pid_t pid) 5021 //{ 5022 // return Host::GetArchSpecForExistingProcess (pid); 5023 //} 5024 // 5025 //ArchSpec 5026 //Process::GetArchSpecForExistingProcess (const char *process_name) 5027 //{ 5028 // return Host::GetArchSpecForExistingProcess (process_name); 5029 //} 5030 // 5031 void 5032 Process::AppendSTDOUT (const char * s, size_t len) 5033 { 5034 Mutex::Locker locker (m_stdio_communication_mutex); 5035 m_stdout_data.append (s, len); 5036 BroadcastEventIfUnique (eBroadcastBitSTDOUT, new ProcessEventData (shared_from_this(), GetState())); 5037 } 5038 5039 void 5040 Process::AppendSTDERR (const char * s, size_t len) 5041 { 5042 Mutex::Locker locker (m_stdio_communication_mutex); 5043 m_stderr_data.append (s, len); 5044 BroadcastEventIfUnique (eBroadcastBitSTDERR, new ProcessEventData (shared_from_this(), GetState())); 5045 } 5046 5047 void 5048 Process::BroadcastAsyncProfileData(const std::string &one_profile_data) 5049 { 5050 Mutex::Locker locker (m_profile_data_comm_mutex); 5051 m_profile_data.push_back(one_profile_data); 5052 BroadcastEventIfUnique (eBroadcastBitProfileData, new ProcessEventData (shared_from_this(), GetState())); 5053 } 5054 5055 size_t 5056 Process::GetAsyncProfileData (char *buf, size_t buf_size, Error &error) 5057 { 5058 Mutex::Locker locker(m_profile_data_comm_mutex); 5059 if (m_profile_data.empty()) 5060 return 0; 5061 5062 std::string &one_profile_data = m_profile_data.front(); 5063 size_t bytes_available = one_profile_data.size(); 5064 if (bytes_available > 0) 5065 { 5066 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5067 if (log) 5068 log->Printf ("Process::GetProfileData (buf = %p, size = %" PRIu64 ")", 5069 static_cast<void*>(buf), 5070 static_cast<uint64_t>(buf_size)); 5071 if (bytes_available > buf_size) 5072 { 5073 memcpy(buf, one_profile_data.c_str(), buf_size); 5074 one_profile_data.erase(0, buf_size); 5075 bytes_available = buf_size; 5076 } 5077 else 5078 { 5079 memcpy(buf, one_profile_data.c_str(), bytes_available); 5080 m_profile_data.erase(m_profile_data.begin()); 5081 } 5082 } 5083 return bytes_available; 5084 } 5085 5086 //------------------------------------------------------------------ 5087 // Process STDIO 5088 //------------------------------------------------------------------ 5089 5090 size_t 5091 Process::GetSTDOUT (char *buf, size_t buf_size, Error &error) 5092 { 5093 Mutex::Locker locker(m_stdio_communication_mutex); 5094 size_t bytes_available = m_stdout_data.size(); 5095 if (bytes_available > 0) 5096 { 5097 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5098 if (log) 5099 log->Printf ("Process::GetSTDOUT (buf = %p, size = %" PRIu64 ")", 5100 static_cast<void*>(buf), 5101 static_cast<uint64_t>(buf_size)); 5102 if (bytes_available > buf_size) 5103 { 5104 memcpy(buf, m_stdout_data.c_str(), buf_size); 5105 m_stdout_data.erase(0, buf_size); 5106 bytes_available = buf_size; 5107 } 5108 else 5109 { 5110 memcpy(buf, m_stdout_data.c_str(), bytes_available); 5111 m_stdout_data.clear(); 5112 } 5113 } 5114 return bytes_available; 5115 } 5116 5117 size_t 5118 Process::GetSTDERR (char *buf, size_t buf_size, Error &error) 5119 { 5120 Mutex::Locker locker(m_stdio_communication_mutex); 5121 size_t bytes_available = m_stderr_data.size(); 5122 if (bytes_available > 0) 5123 { 5124 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5125 if (log) 5126 log->Printf ("Process::GetSTDERR (buf = %p, size = %" PRIu64 ")", 5127 static_cast<void*>(buf), 5128 static_cast<uint64_t>(buf_size)); 5129 if (bytes_available > buf_size) 5130 { 5131 memcpy(buf, m_stderr_data.c_str(), buf_size); 5132 m_stderr_data.erase(0, buf_size); 5133 bytes_available = buf_size; 5134 } 5135 else 5136 { 5137 memcpy(buf, m_stderr_data.c_str(), bytes_available); 5138 m_stderr_data.clear(); 5139 } 5140 } 5141 return bytes_available; 5142 } 5143 5144 void 5145 Process::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len) 5146 { 5147 Process *process = (Process *) baton; 5148 process->AppendSTDOUT (static_cast<const char *>(src), src_len); 5149 } 5150 5151 class IOHandlerProcessSTDIO : 5152 public IOHandler 5153 { 5154 public: 5155 IOHandlerProcessSTDIO (Process *process, 5156 int write_fd) : 5157 IOHandler(process->GetTarget().GetDebugger(), IOHandler::Type::ProcessIO), 5158 m_process (process), 5159 m_read_file (), 5160 m_write_file (write_fd, false), 5161 m_pipe () 5162 { 5163 m_pipe.CreateNew(false); 5164 m_read_file.SetDescriptor(GetInputFD(), false); 5165 } 5166 5167 ~IOHandlerProcessSTDIO() override = default; 5168 5169 // Each IOHandler gets to run until it is done. It should read data 5170 // from the "in" and place output into "out" and "err and return 5171 // when done. 5172 void 5173 Run () override 5174 { 5175 if (!m_read_file.IsValid() || !m_write_file.IsValid() || !m_pipe.CanRead() || !m_pipe.CanWrite()) 5176 { 5177 SetIsDone(true); 5178 return; 5179 } 5180 5181 SetIsDone(false); 5182 const int read_fd = m_read_file.GetDescriptor(); 5183 TerminalState terminal_state; 5184 terminal_state.Save (read_fd, false); 5185 Terminal terminal(read_fd); 5186 terminal.SetCanonical(false); 5187 terminal.SetEcho(false); 5188 // FD_ZERO, FD_SET are not supported on windows 5189 #ifndef _WIN32 5190 const int pipe_read_fd = m_pipe.GetReadFileDescriptor(); 5191 while (!GetIsDone()) 5192 { 5193 fd_set read_fdset; 5194 FD_ZERO (&read_fdset); 5195 FD_SET (read_fd, &read_fdset); 5196 FD_SET (pipe_read_fd, &read_fdset); 5197 const int nfds = std::max<int>(read_fd, pipe_read_fd) + 1; 5198 int num_set_fds = select (nfds, &read_fdset, NULL, NULL, NULL); 5199 if (num_set_fds < 0) 5200 { 5201 const int select_errno = errno; 5202 5203 if (select_errno != EINTR) 5204 SetIsDone(true); 5205 } 5206 else if (num_set_fds > 0) 5207 { 5208 char ch = 0; 5209 size_t n; 5210 if (FD_ISSET (read_fd, &read_fdset)) 5211 { 5212 n = 1; 5213 if (m_read_file.Read(&ch, n).Success() && n == 1) 5214 { 5215 if (m_write_file.Write(&ch, n).Fail() || n != 1) 5216 SetIsDone(true); 5217 } 5218 else 5219 SetIsDone(true); 5220 } 5221 if (FD_ISSET (pipe_read_fd, &read_fdset)) 5222 { 5223 size_t bytes_read; 5224 // Consume the interrupt byte 5225 Error error = m_pipe.Read(&ch, 1, bytes_read); 5226 if (error.Success()) 5227 { 5228 switch (ch) 5229 { 5230 case 'q': 5231 SetIsDone(true); 5232 break; 5233 case 'i': 5234 if (StateIsRunningState(m_process->GetState())) 5235 m_process->SendAsyncInterrupt(); 5236 break; 5237 } 5238 } 5239 } 5240 } 5241 } 5242 #endif 5243 terminal_state.Restore(); 5244 } 5245 5246 void 5247 Cancel () override 5248 { 5249 char ch = 'q'; // Send 'q' for quit 5250 size_t bytes_written = 0; 5251 m_pipe.Write(&ch, 1, bytes_written); 5252 } 5253 5254 bool 5255 Interrupt () override 5256 { 5257 // Do only things that are safe to do in an interrupt context (like in 5258 // a SIGINT handler), like write 1 byte to a file descriptor. This will 5259 // interrupt the IOHandlerProcessSTDIO::Run() and we can look at the byte 5260 // that was written to the pipe and then call m_process->SendAsyncInterrupt() 5261 // from a much safer location in code. 5262 if (m_active) 5263 { 5264 char ch = 'i'; // Send 'i' for interrupt 5265 size_t bytes_written = 0; 5266 Error result = m_pipe.Write(&ch, 1, bytes_written); 5267 return result.Success(); 5268 } 5269 else 5270 { 5271 // This IOHandler might be pushed on the stack, but not being run currently 5272 // so do the right thing if we aren't actively watching for STDIN by sending 5273 // the interrupt to the process. Otherwise the write to the pipe above would 5274 // do nothing. This can happen when the command interpreter is running and 5275 // gets a "expression ...". It will be on the IOHandler thread and sending 5276 // the input is complete to the delegate which will cause the expression to 5277 // run, which will push the process IO handler, but not run it. 5278 5279 if (StateIsRunningState(m_process->GetState())) 5280 { 5281 m_process->SendAsyncInterrupt(); 5282 return true; 5283 } 5284 } 5285 return false; 5286 } 5287 5288 void 5289 GotEOF() override 5290 { 5291 } 5292 5293 protected: 5294 Process *m_process; 5295 File m_read_file; // Read from this file (usually actual STDIN for LLDB 5296 File m_write_file; // Write to this file (usually the master pty for getting io to debuggee) 5297 Pipe m_pipe; 5298 }; 5299 5300 void 5301 Process::SetSTDIOFileDescriptor (int fd) 5302 { 5303 // First set up the Read Thread for reading/handling process I/O 5304 5305 std::unique_ptr<ConnectionFileDescriptor> conn_ap (new ConnectionFileDescriptor (fd, true)); 5306 5307 if (conn_ap.get()) 5308 { 5309 m_stdio_communication.SetConnection (conn_ap.release()); 5310 if (m_stdio_communication.IsConnected()) 5311 { 5312 m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this); 5313 m_stdio_communication.StartReadThread(); 5314 5315 // Now read thread is set up, set up input reader. 5316 5317 if (!m_process_input_reader.get()) 5318 m_process_input_reader.reset (new IOHandlerProcessSTDIO (this, fd)); 5319 } 5320 } 5321 } 5322 5323 bool 5324 Process::ProcessIOHandlerIsActive () 5325 { 5326 IOHandlerSP io_handler_sp (m_process_input_reader); 5327 if (io_handler_sp) 5328 return GetTarget().GetDebugger().IsTopIOHandler (io_handler_sp); 5329 return false; 5330 } 5331 bool 5332 Process::PushProcessIOHandler () 5333 { 5334 IOHandlerSP io_handler_sp (m_process_input_reader); 5335 if (io_handler_sp) 5336 { 5337 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 5338 if (log) 5339 log->Printf("Process::%s pushing IO handler", __FUNCTION__); 5340 5341 io_handler_sp->SetIsDone(false); 5342 GetTarget().GetDebugger().PushIOHandler (io_handler_sp); 5343 return true; 5344 } 5345 return false; 5346 } 5347 5348 bool 5349 Process::PopProcessIOHandler () 5350 { 5351 IOHandlerSP io_handler_sp (m_process_input_reader); 5352 if (io_handler_sp) 5353 return GetTarget().GetDebugger().PopIOHandler (io_handler_sp); 5354 return false; 5355 } 5356 5357 // The process needs to know about installed plug-ins 5358 void 5359 Process::SettingsInitialize () 5360 { 5361 Thread::SettingsInitialize (); 5362 } 5363 5364 void 5365 Process::SettingsTerminate () 5366 { 5367 Thread::SettingsTerminate (); 5368 } 5369 5370 namespace 5371 { 5372 // RestorePlanState is used to record the "is private", "is master" and "okay to discard" fields of 5373 // the plan we are running, and reset it on Clean or on destruction. 5374 // It will only reset the state once, so you can call Clean and then monkey with the state and it 5375 // won't get reset on you again. 5376 5377 class RestorePlanState 5378 { 5379 public: 5380 RestorePlanState (lldb::ThreadPlanSP thread_plan_sp) : 5381 m_thread_plan_sp(thread_plan_sp), 5382 m_already_reset(false) 5383 { 5384 if (m_thread_plan_sp) 5385 { 5386 m_private = m_thread_plan_sp->GetPrivate(); 5387 m_is_master = m_thread_plan_sp->IsMasterPlan(); 5388 m_okay_to_discard = m_thread_plan_sp->OkayToDiscard(); 5389 } 5390 } 5391 5392 ~RestorePlanState() 5393 { 5394 Clean(); 5395 } 5396 5397 void 5398 Clean () 5399 { 5400 if (!m_already_reset && m_thread_plan_sp) 5401 { 5402 m_already_reset = true; 5403 m_thread_plan_sp->SetPrivate(m_private); 5404 m_thread_plan_sp->SetIsMasterPlan (m_is_master); 5405 m_thread_plan_sp->SetOkayToDiscard(m_okay_to_discard); 5406 } 5407 } 5408 5409 private: 5410 lldb::ThreadPlanSP m_thread_plan_sp; 5411 bool m_already_reset; 5412 bool m_private; 5413 bool m_is_master; 5414 bool m_okay_to_discard; 5415 }; 5416 } // anonymous namespace 5417 5418 ExpressionResults 5419 Process::RunThreadPlan (ExecutionContext &exe_ctx, 5420 lldb::ThreadPlanSP &thread_plan_sp, 5421 const EvaluateExpressionOptions &options, 5422 Stream &errors) 5423 { 5424 ExpressionResults return_value = eExpressionSetupError; 5425 5426 if (thread_plan_sp.get() == NULL) 5427 { 5428 errors.Printf("RunThreadPlan called with empty thread plan."); 5429 return eExpressionSetupError; 5430 } 5431 5432 if (!thread_plan_sp->ValidatePlan(NULL)) 5433 { 5434 errors.Printf ("RunThreadPlan called with an invalid thread plan."); 5435 return eExpressionSetupError; 5436 } 5437 5438 if (exe_ctx.GetProcessPtr() != this) 5439 { 5440 errors.Printf("RunThreadPlan called on wrong process."); 5441 return eExpressionSetupError; 5442 } 5443 5444 Thread *thread = exe_ctx.GetThreadPtr(); 5445 if (thread == NULL) 5446 { 5447 errors.Printf("RunThreadPlan called with invalid thread."); 5448 return eExpressionSetupError; 5449 } 5450 5451 // We need to change some of the thread plan attributes for the thread plan runner. This will restore them 5452 // when we are done: 5453 5454 RestorePlanState thread_plan_restorer(thread_plan_sp); 5455 5456 // We rely on the thread plan we are running returning "PlanCompleted" if when it successfully completes. 5457 // For that to be true the plan can't be private - since private plans suppress themselves in the 5458 // GetCompletedPlan call. 5459 5460 thread_plan_sp->SetPrivate(false); 5461 5462 // The plans run with RunThreadPlan also need to be terminal master plans or when they are done we will end 5463 // up asking the plan above us whether we should stop, which may give the wrong answer. 5464 5465 thread_plan_sp->SetIsMasterPlan (true); 5466 thread_plan_sp->SetOkayToDiscard(false); 5467 5468 if (m_private_state.GetValue() != eStateStopped) 5469 { 5470 errors.Printf ("RunThreadPlan called while the private state was not stopped."); 5471 return eExpressionSetupError; 5472 } 5473 5474 // Save the thread & frame from the exe_ctx for restoration after we run 5475 const uint32_t thread_idx_id = thread->GetIndexID(); 5476 StackFrameSP selected_frame_sp = thread->GetSelectedFrame(); 5477 if (!selected_frame_sp) 5478 { 5479 thread->SetSelectedFrame(0); 5480 selected_frame_sp = thread->GetSelectedFrame(); 5481 if (!selected_frame_sp) 5482 { 5483 errors.Printf("RunThreadPlan called without a selected frame on thread %d", thread_idx_id); 5484 return eExpressionSetupError; 5485 } 5486 } 5487 5488 StackID ctx_frame_id = selected_frame_sp->GetStackID(); 5489 5490 // N.B. Running the target may unset the currently selected thread and frame. We don't want to do that either, 5491 // so we should arrange to reset them as well. 5492 5493 lldb::ThreadSP selected_thread_sp = GetThreadList().GetSelectedThread(); 5494 5495 uint32_t selected_tid; 5496 StackID selected_stack_id; 5497 if (selected_thread_sp) 5498 { 5499 selected_tid = selected_thread_sp->GetIndexID(); 5500 selected_stack_id = selected_thread_sp->GetSelectedFrame()->GetStackID(); 5501 } 5502 else 5503 { 5504 selected_tid = LLDB_INVALID_THREAD_ID; 5505 } 5506 5507 HostThread backup_private_state_thread; 5508 lldb::StateType old_state = eStateInvalid; 5509 lldb::ThreadPlanSP stopper_base_plan_sp; 5510 5511 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 5512 if (m_private_state_thread.EqualsThread(Host::GetCurrentThread())) 5513 { 5514 // Yikes, we are running on the private state thread! So we can't wait for public events on this thread, since 5515 // we are the thread that is generating public events. 5516 // The simplest thing to do is to spin up a temporary thread to handle private state thread events while 5517 // we are fielding public events here. 5518 if (log) 5519 log->Printf ("Running thread plan on private state thread, spinning up another state thread to handle the events."); 5520 5521 backup_private_state_thread = m_private_state_thread; 5522 5523 // One other bit of business: we want to run just this thread plan and anything it pushes, and then stop, 5524 // returning control here. 5525 // But in the normal course of things, the plan above us on the stack would be given a shot at the stop 5526 // event before deciding to stop, and we don't want that. So we insert a "stopper" base plan on the stack 5527 // before the plan we want to run. Since base plans always stop and return control to the user, that will 5528 // do just what we want. 5529 stopper_base_plan_sp.reset(new ThreadPlanBase (*thread)); 5530 thread->QueueThreadPlan (stopper_base_plan_sp, false); 5531 // Have to make sure our public state is stopped, since otherwise the reporting logic below doesn't work correctly. 5532 old_state = m_public_state.GetValue(); 5533 m_public_state.SetValueNoLock(eStateStopped); 5534 5535 // Now spin up the private state thread: 5536 StartPrivateStateThread(true); 5537 } 5538 5539 thread->QueueThreadPlan(thread_plan_sp, false); // This used to pass "true" does that make sense? 5540 5541 if (options.GetDebug()) 5542 { 5543 // In this case, we aren't actually going to run, we just want to stop right away. 5544 // Flush this thread so we will refetch the stacks and show the correct backtrace. 5545 // FIXME: To make this prettier we should invent some stop reason for this, but that 5546 // is only cosmetic, and this functionality is only of use to lldb developers who can 5547 // live with not pretty... 5548 thread->Flush(); 5549 return eExpressionStoppedForDebug; 5550 } 5551 5552 Listener listener("lldb.process.listener.run-thread-plan"); 5553 5554 lldb::EventSP event_to_broadcast_sp; 5555 5556 { 5557 // This process event hijacker Hijacks the Public events and its destructor makes sure that the process events get 5558 // restored on exit to the function. 5559 // 5560 // If the event needs to propagate beyond the hijacker (e.g., the process exits during execution), then the event 5561 // is put into event_to_broadcast_sp for rebroadcasting. 5562 5563 ProcessEventHijacker run_thread_plan_hijacker (*this, &listener); 5564 5565 if (log) 5566 { 5567 StreamString s; 5568 thread_plan_sp->GetDescription(&s, lldb::eDescriptionLevelVerbose); 5569 log->Printf ("Process::RunThreadPlan(): Resuming thread %u - 0x%4.4" PRIx64 " to run thread plan \"%s\".", 5570 thread->GetIndexID(), 5571 thread->GetID(), 5572 s.GetData()); 5573 } 5574 5575 bool got_event; 5576 lldb::EventSP event_sp; 5577 lldb::StateType stop_state = lldb::eStateInvalid; 5578 5579 TimeValue* timeout_ptr = NULL; 5580 TimeValue real_timeout; 5581 5582 bool before_first_timeout = true; // This is set to false the first time that we have to halt the target. 5583 bool do_resume = true; 5584 bool handle_running_event = true; 5585 const uint64_t default_one_thread_timeout_usec = 250000; 5586 5587 // This is just for accounting: 5588 uint32_t num_resumes = 0; 5589 5590 uint32_t timeout_usec = options.GetTimeoutUsec(); 5591 uint32_t one_thread_timeout_usec; 5592 uint32_t all_threads_timeout_usec = 0; 5593 5594 // If we are going to run all threads the whole time, or if we are only going to run one thread, 5595 // then we don't need the first timeout. So we set the final timeout, and pretend we are after the 5596 // first timeout already. 5597 5598 if (!options.GetStopOthers() || !options.GetTryAllThreads()) 5599 { 5600 before_first_timeout = false; 5601 one_thread_timeout_usec = 0; 5602 all_threads_timeout_usec = timeout_usec; 5603 } 5604 else 5605 { 5606 uint32_t option_one_thread_timeout = options.GetOneThreadTimeoutUsec(); 5607 5608 // If the overall wait is forever, then we only need to set the one thread timeout: 5609 if (timeout_usec == 0) 5610 { 5611 if (option_one_thread_timeout != 0) 5612 one_thread_timeout_usec = option_one_thread_timeout; 5613 else 5614 one_thread_timeout_usec = default_one_thread_timeout_usec; 5615 } 5616 else 5617 { 5618 // Otherwise, if the one thread timeout is set, make sure it isn't longer than the overall timeout, 5619 // and use it, otherwise use half the total timeout, bounded by the default_one_thread_timeout_usec. 5620 uint64_t computed_one_thread_timeout; 5621 if (option_one_thread_timeout != 0) 5622 { 5623 if (timeout_usec < option_one_thread_timeout) 5624 { 5625 errors.Printf("RunThreadPlan called without one thread timeout greater than total timeout"); 5626 return eExpressionSetupError; 5627 } 5628 computed_one_thread_timeout = option_one_thread_timeout; 5629 } 5630 else 5631 { 5632 computed_one_thread_timeout = timeout_usec / 2; 5633 if (computed_one_thread_timeout > default_one_thread_timeout_usec) 5634 computed_one_thread_timeout = default_one_thread_timeout_usec; 5635 } 5636 one_thread_timeout_usec = computed_one_thread_timeout; 5637 all_threads_timeout_usec = timeout_usec - one_thread_timeout_usec; 5638 } 5639 } 5640 5641 if (log) 5642 log->Printf ("Stop others: %u, try all: %u, before_first: %u, one thread: %" PRIu32 " - all threads: %" PRIu32 ".\n", 5643 options.GetStopOthers(), 5644 options.GetTryAllThreads(), 5645 before_first_timeout, 5646 one_thread_timeout_usec, 5647 all_threads_timeout_usec); 5648 5649 // This isn't going to work if there are unfetched events on the queue. 5650 // Are there cases where we might want to run the remaining events here, and then try to 5651 // call the function? That's probably being too tricky for our own good. 5652 5653 Event *other_events = listener.PeekAtNextEvent(); 5654 if (other_events != NULL) 5655 { 5656 errors.Printf("Calling RunThreadPlan with pending events on the queue."); 5657 return eExpressionSetupError; 5658 } 5659 5660 // We also need to make sure that the next event is delivered. We might be calling a function as part of 5661 // a thread plan, in which case the last delivered event could be the running event, and we don't want 5662 // event coalescing to cause us to lose OUR running event... 5663 ForceNextEventDelivery(); 5664 5665 // This while loop must exit out the bottom, there's cleanup that we need to do when we are done. 5666 // So don't call return anywhere within it. 5667 5668 #ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT 5669 // It's pretty much impossible to write test cases for things like: 5670 // One thread timeout expires, I go to halt, but the process already stopped 5671 // on the function call stop breakpoint. Turning on this define will make us not 5672 // fetch the first event till after the halt. So if you run a quick function, it will have 5673 // completed, and the completion event will be waiting, when you interrupt for halt. 5674 // The expression evaluation should still succeed. 5675 bool miss_first_event = true; 5676 #endif 5677 TimeValue one_thread_timeout; 5678 TimeValue final_timeout; 5679 5680 while (1) 5681 { 5682 // We usually want to resume the process if we get to the top of the loop. 5683 // The only exception is if we get two running events with no intervening 5684 // stop, which can happen, we will just wait for then next stop event. 5685 if (log) 5686 log->Printf ("Top of while loop: do_resume: %i handle_running_event: %i before_first_timeout: %i.", 5687 do_resume, 5688 handle_running_event, 5689 before_first_timeout); 5690 5691 if (do_resume || handle_running_event) 5692 { 5693 // Do the initial resume and wait for the running event before going further. 5694 5695 if (do_resume) 5696 { 5697 num_resumes++; 5698 Error resume_error = PrivateResume (); 5699 if (!resume_error.Success()) 5700 { 5701 errors.Printf("Error resuming inferior the %d time: \"%s\".\n", 5702 num_resumes, 5703 resume_error.AsCString()); 5704 return_value = eExpressionSetupError; 5705 break; 5706 } 5707 } 5708 5709 TimeValue resume_timeout = TimeValue::Now(); 5710 resume_timeout.OffsetWithMicroSeconds(500000); 5711 5712 got_event = listener.WaitForEvent(&resume_timeout, event_sp); 5713 if (!got_event) 5714 { 5715 if (log) 5716 log->Printf ("Process::RunThreadPlan(): didn't get any event after resume %d, exiting.", 5717 num_resumes); 5718 5719 errors.Printf("Didn't get any event after resume %d, exiting.", num_resumes); 5720 return_value = eExpressionSetupError; 5721 break; 5722 } 5723 5724 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5725 5726 if (stop_state != eStateRunning) 5727 { 5728 bool restarted = false; 5729 5730 if (stop_state == eStateStopped) 5731 { 5732 restarted = Process::ProcessEventData::GetRestartedFromEvent(event_sp.get()); 5733 if (log) 5734 log->Printf("Process::RunThreadPlan(): didn't get running event after " 5735 "resume %d, got %s instead (restarted: %i, do_resume: %i, handle_running_event: %i).", 5736 num_resumes, 5737 StateAsCString(stop_state), 5738 restarted, 5739 do_resume, 5740 handle_running_event); 5741 } 5742 5743 if (restarted) 5744 { 5745 // This is probably an overabundance of caution, I don't think I should ever get a stopped & restarted 5746 // event here. But if I do, the best thing is to Halt and then get out of here. 5747 Halt(); 5748 } 5749 5750 errors.Printf("Didn't get running event after initial resume, got %s instead.", 5751 StateAsCString(stop_state)); 5752 return_value = eExpressionSetupError; 5753 break; 5754 } 5755 5756 if (log) 5757 log->PutCString ("Process::RunThreadPlan(): resuming succeeded."); 5758 // We need to call the function synchronously, so spin waiting for it to return. 5759 // If we get interrupted while executing, we're going to lose our context, and 5760 // won't be able to gather the result at this point. 5761 // We set the timeout AFTER the resume, since the resume takes some time and we 5762 // don't want to charge that to the timeout. 5763 } 5764 else 5765 { 5766 if (log) 5767 log->PutCString ("Process::RunThreadPlan(): waiting for next event."); 5768 } 5769 5770 if (before_first_timeout) 5771 { 5772 if (options.GetTryAllThreads()) 5773 { 5774 one_thread_timeout = TimeValue::Now(); 5775 one_thread_timeout.OffsetWithMicroSeconds(one_thread_timeout_usec); 5776 timeout_ptr = &one_thread_timeout; 5777 } 5778 else 5779 { 5780 if (timeout_usec == 0) 5781 timeout_ptr = NULL; 5782 else 5783 { 5784 final_timeout = TimeValue::Now(); 5785 final_timeout.OffsetWithMicroSeconds (timeout_usec); 5786 timeout_ptr = &final_timeout; 5787 } 5788 } 5789 } 5790 else 5791 { 5792 if (timeout_usec == 0) 5793 timeout_ptr = NULL; 5794 else 5795 { 5796 final_timeout = TimeValue::Now(); 5797 final_timeout.OffsetWithMicroSeconds (all_threads_timeout_usec); 5798 timeout_ptr = &final_timeout; 5799 } 5800 } 5801 5802 do_resume = true; 5803 handle_running_event = true; 5804 5805 // Now wait for the process to stop again: 5806 event_sp.reset(); 5807 5808 if (log) 5809 { 5810 if (timeout_ptr) 5811 { 5812 log->Printf ("Process::RunThreadPlan(): about to wait - now is %" PRIu64 " - endpoint is %" PRIu64, 5813 TimeValue::Now().GetAsMicroSecondsSinceJan1_1970(), 5814 timeout_ptr->GetAsMicroSecondsSinceJan1_1970()); 5815 } 5816 else 5817 { 5818 log->Printf ("Process::RunThreadPlan(): about to wait forever."); 5819 } 5820 } 5821 5822 #ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT 5823 // See comment above... 5824 if (miss_first_event) 5825 { 5826 usleep(1000); 5827 miss_first_event = false; 5828 got_event = false; 5829 } 5830 else 5831 #endif 5832 got_event = listener.WaitForEvent (timeout_ptr, event_sp); 5833 5834 if (got_event) 5835 { 5836 if (event_sp.get()) 5837 { 5838 bool keep_going = false; 5839 if (event_sp->GetType() == eBroadcastBitInterrupt) 5840 { 5841 Halt(); 5842 return_value = eExpressionInterrupted; 5843 errors.Printf ("Execution halted by user interrupt."); 5844 if (log) 5845 log->Printf ("Process::RunThreadPlan(): Got interrupted by eBroadcastBitInterrupted, exiting."); 5846 break; 5847 } 5848 else 5849 { 5850 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5851 if (log) 5852 log->Printf("Process::RunThreadPlan(): in while loop, got event: %s.", StateAsCString(stop_state)); 5853 5854 switch (stop_state) 5855 { 5856 case lldb::eStateStopped: 5857 { 5858 // We stopped, figure out what we are going to do now. 5859 ThreadSP thread_sp = GetThreadList().FindThreadByIndexID (thread_idx_id); 5860 if (!thread_sp) 5861 { 5862 // Ooh, our thread has vanished. Unlikely that this was successful execution... 5863 if (log) 5864 log->Printf ("Process::RunThreadPlan(): execution completed but our thread (index-id=%u) has vanished.", thread_idx_id); 5865 return_value = eExpressionInterrupted; 5866 } 5867 else 5868 { 5869 // If we were restarted, we just need to go back up to fetch another event. 5870 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5871 { 5872 if (log) 5873 { 5874 log->Printf ("Process::RunThreadPlan(): Got a stop and restart, so we'll continue waiting."); 5875 } 5876 keep_going = true; 5877 do_resume = false; 5878 handle_running_event = true; 5879 } 5880 else 5881 { 5882 StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 5883 StopReason stop_reason = eStopReasonInvalid; 5884 if (stop_info_sp) 5885 stop_reason = stop_info_sp->GetStopReason(); 5886 5887 // FIXME: We only check if the stop reason is plan complete, should we make sure that 5888 // it is OUR plan that is complete? 5889 if (stop_reason == eStopReasonPlanComplete) 5890 { 5891 if (log) 5892 log->PutCString ("Process::RunThreadPlan(): execution completed successfully."); 5893 5894 // Restore the plan state so it will get reported as intended when we are done. 5895 thread_plan_restorer.Clean(); 5896 5897 return_value = eExpressionCompleted; 5898 } 5899 else 5900 { 5901 // Something restarted the target, so just wait for it to stop for real. 5902 if (stop_reason == eStopReasonBreakpoint) 5903 { 5904 if (log) 5905 log->Printf ("Process::RunThreadPlan() stopped for breakpoint: %s.", stop_info_sp->GetDescription()); 5906 return_value = eExpressionHitBreakpoint; 5907 if (!options.DoesIgnoreBreakpoints()) 5908 { 5909 // Restore the plan state and then force Private to false. We are 5910 // going to stop because of this plan so we need it to become a public 5911 // plan or it won't report correctly when we continue to its termination 5912 // later on. 5913 thread_plan_restorer.Clean(); 5914 if (thread_plan_sp) 5915 thread_plan_sp->SetPrivate(false); 5916 event_to_broadcast_sp = event_sp; 5917 } 5918 } 5919 else 5920 { 5921 if (log) 5922 log->PutCString ("Process::RunThreadPlan(): thread plan didn't successfully complete."); 5923 if (!options.DoesUnwindOnError()) 5924 event_to_broadcast_sp = event_sp; 5925 return_value = eExpressionInterrupted; 5926 } 5927 } 5928 } 5929 } 5930 } 5931 break; 5932 5933 case lldb::eStateRunning: 5934 // This shouldn't really happen, but sometimes we do get two running events without an 5935 // intervening stop, and in that case we should just go back to waiting for the stop. 5936 do_resume = false; 5937 keep_going = true; 5938 handle_running_event = false; 5939 break; 5940 5941 default: 5942 if (log) 5943 log->Printf("Process::RunThreadPlan(): execution stopped with unexpected state: %s.", StateAsCString(stop_state)); 5944 5945 if (stop_state == eStateExited) 5946 event_to_broadcast_sp = event_sp; 5947 5948 errors.Printf ("Execution stopped with unexpected state.\n"); 5949 return_value = eExpressionInterrupted; 5950 break; 5951 } 5952 } 5953 5954 if (keep_going) 5955 continue; 5956 else 5957 break; 5958 } 5959 else 5960 { 5961 if (log) 5962 log->PutCString ("Process::RunThreadPlan(): got_event was true, but the event pointer was null. How odd..."); 5963 return_value = eExpressionInterrupted; 5964 break; 5965 } 5966 } 5967 else 5968 { 5969 // If we didn't get an event that means we've timed out... 5970 // We will interrupt the process here. Depending on what we were asked to do we will 5971 // either exit, or try with all threads running for the same timeout. 5972 5973 if (log) { 5974 if (options.GetTryAllThreads()) 5975 { 5976 if (before_first_timeout) 5977 { 5978 if (timeout_usec != 0) 5979 { 5980 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5981 "running for %" PRIu32 " usec with all threads enabled.", 5982 all_threads_timeout_usec); 5983 } 5984 else 5985 { 5986 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5987 "running forever with all threads enabled."); 5988 } 5989 } 5990 else 5991 log->Printf ("Process::RunThreadPlan(): Restarting function with all threads enabled " 5992 "and timeout: %u timed out, abandoning execution.", 5993 timeout_usec); 5994 } 5995 else 5996 log->Printf ("Process::RunThreadPlan(): Running function with timeout: %u timed out, " 5997 "abandoning execution.", 5998 timeout_usec); 5999 } 6000 6001 // It is possible that between the time we issued the Halt, and we get around to calling Halt the target 6002 // could have stopped. That's fine, Halt will figure that out and send the appropriate Stopped event. 6003 // BUT it is also possible that we stopped & restarted (e.g. hit a signal with "stop" set to false.) In 6004 // that case, we'll get the stopped & restarted event, and we should go back to waiting for the Halt's 6005 // stopped event. That's what this while loop does. 6006 6007 bool back_to_top = true; 6008 uint32_t try_halt_again = 0; 6009 bool do_halt = true; 6010 const uint32_t num_retries = 5; 6011 while (try_halt_again < num_retries) 6012 { 6013 Error halt_error; 6014 if (do_halt) 6015 { 6016 if (log) 6017 log->Printf ("Process::RunThreadPlan(): Running Halt."); 6018 halt_error = Halt(); 6019 } 6020 if (halt_error.Success()) 6021 { 6022 if (log) 6023 log->PutCString ("Process::RunThreadPlan(): Halt succeeded."); 6024 6025 real_timeout = TimeValue::Now(); 6026 real_timeout.OffsetWithMicroSeconds(500000); 6027 6028 got_event = listener.WaitForEvent(&real_timeout, event_sp); 6029 6030 if (got_event) 6031 { 6032 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 6033 if (log) 6034 { 6035 log->Printf ("Process::RunThreadPlan(): Stopped with event: %s", StateAsCString(stop_state)); 6036 if (stop_state == lldb::eStateStopped 6037 && Process::ProcessEventData::GetInterruptedFromEvent(event_sp.get())) 6038 log->PutCString (" Event was the Halt interruption event."); 6039 } 6040 6041 if (stop_state == lldb::eStateStopped) 6042 { 6043 // Between the time we initiated the Halt and the time we delivered it, the process could have 6044 // already finished its job. Check that here: 6045 6046 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 6047 { 6048 if (log) 6049 log->PutCString ("Process::RunThreadPlan(): Even though we timed out, the call plan was done. " 6050 "Exiting wait loop."); 6051 return_value = eExpressionCompleted; 6052 back_to_top = false; 6053 break; 6054 } 6055 6056 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 6057 { 6058 if (log) 6059 log->PutCString ("Process::RunThreadPlan(): Went to halt but got a restarted event, there must be an un-restarted stopped event so try again... " 6060 "Exiting wait loop."); 6061 try_halt_again++; 6062 do_halt = false; 6063 continue; 6064 } 6065 6066 if (!options.GetTryAllThreads()) 6067 { 6068 if (log) 6069 log->PutCString ("Process::RunThreadPlan(): try_all_threads was false, we stopped so now we're quitting."); 6070 return_value = eExpressionInterrupted; 6071 back_to_top = false; 6072 break; 6073 } 6074 6075 if (before_first_timeout) 6076 { 6077 // Set all the other threads to run, and return to the top of the loop, which will continue; 6078 before_first_timeout = false; 6079 thread_plan_sp->SetStopOthers (false); 6080 if (log) 6081 log->PutCString ("Process::RunThreadPlan(): about to resume."); 6082 6083 back_to_top = true; 6084 break; 6085 } 6086 else 6087 { 6088 // Running all threads failed, so return Interrupted. 6089 if (log) 6090 log->PutCString("Process::RunThreadPlan(): running all threads timed out."); 6091 return_value = eExpressionInterrupted; 6092 back_to_top = false; 6093 break; 6094 } 6095 } 6096 } 6097 else 6098 { if (log) 6099 log->PutCString("Process::RunThreadPlan(): halt said it succeeded, but I got no event. " 6100 "I'm getting out of here passing Interrupted."); 6101 return_value = eExpressionInterrupted; 6102 back_to_top = false; 6103 break; 6104 } 6105 } 6106 else 6107 { 6108 try_halt_again++; 6109 continue; 6110 } 6111 } 6112 6113 if (!back_to_top || try_halt_again > num_retries) 6114 break; 6115 else 6116 continue; 6117 } 6118 } // END WAIT LOOP 6119 6120 // If we had to start up a temporary private state thread to run this thread plan, shut it down now. 6121 if (backup_private_state_thread.IsJoinable()) 6122 { 6123 StopPrivateStateThread(); 6124 Error error; 6125 m_private_state_thread = backup_private_state_thread; 6126 if (stopper_base_plan_sp) 6127 { 6128 thread->DiscardThreadPlansUpToPlan(stopper_base_plan_sp); 6129 } 6130 if (old_state != eStateInvalid) 6131 m_public_state.SetValueNoLock(old_state); 6132 } 6133 6134 if (return_value != eExpressionCompleted && log) 6135 { 6136 // Print a backtrace into the log so we can figure out where we are: 6137 StreamString s; 6138 s.PutCString("Thread state after unsuccessful completion: \n"); 6139 thread->GetStackFrameStatus (s, 6140 0, 6141 UINT32_MAX, 6142 true, 6143 UINT32_MAX); 6144 log->PutCString(s.GetData()); 6145 6146 } 6147 // Restore the thread state if we are going to discard the plan execution. There are three cases where this 6148 // could happen: 6149 // 1) The execution successfully completed 6150 // 2) We hit a breakpoint, and ignore_breakpoints was true 6151 // 3) We got some other error, and discard_on_error was true 6152 bool should_unwind = (return_value == eExpressionInterrupted && options.DoesUnwindOnError()) 6153 || (return_value == eExpressionHitBreakpoint && options.DoesIgnoreBreakpoints()); 6154 6155 if (return_value == eExpressionCompleted 6156 || should_unwind) 6157 { 6158 thread_plan_sp->RestoreThreadState(); 6159 } 6160 6161 // Now do some processing on the results of the run: 6162 if (return_value == eExpressionInterrupted || return_value == eExpressionHitBreakpoint) 6163 { 6164 if (log) 6165 { 6166 StreamString s; 6167 if (event_sp) 6168 event_sp->Dump (&s); 6169 else 6170 { 6171 log->PutCString ("Process::RunThreadPlan(): Stop event that interrupted us is NULL."); 6172 } 6173 6174 StreamString ts; 6175 6176 const char *event_explanation = NULL; 6177 6178 do 6179 { 6180 if (!event_sp) 6181 { 6182 event_explanation = "<no event>"; 6183 break; 6184 } 6185 else if (event_sp->GetType() == eBroadcastBitInterrupt) 6186 { 6187 event_explanation = "<user interrupt>"; 6188 break; 6189 } 6190 else 6191 { 6192 const Process::ProcessEventData *event_data = Process::ProcessEventData::GetEventDataFromEvent (event_sp.get()); 6193 6194 if (!event_data) 6195 { 6196 event_explanation = "<no event data>"; 6197 break; 6198 } 6199 6200 Process *process = event_data->GetProcessSP().get(); 6201 6202 if (!process) 6203 { 6204 event_explanation = "<no process>"; 6205 break; 6206 } 6207 6208 ThreadList &thread_list = process->GetThreadList(); 6209 6210 uint32_t num_threads = thread_list.GetSize(); 6211 uint32_t thread_index; 6212 6213 ts.Printf("<%u threads> ", num_threads); 6214 6215 for (thread_index = 0; 6216 thread_index < num_threads; 6217 ++thread_index) 6218 { 6219 Thread *thread = thread_list.GetThreadAtIndex(thread_index).get(); 6220 6221 if (!thread) 6222 { 6223 ts.Printf("<?> "); 6224 continue; 6225 } 6226 6227 ts.Printf("<0x%4.4" PRIx64 " ", thread->GetID()); 6228 RegisterContext *register_context = thread->GetRegisterContext().get(); 6229 6230 if (register_context) 6231 ts.Printf("[ip 0x%" PRIx64 "] ", register_context->GetPC()); 6232 else 6233 ts.Printf("[ip unknown] "); 6234 6235 // Show the private stop info here, the public stop info will be from the last natural stop. 6236 lldb::StopInfoSP stop_info_sp = thread->GetPrivateStopInfo(); 6237 if (stop_info_sp) 6238 { 6239 const char *stop_desc = stop_info_sp->GetDescription(); 6240 if (stop_desc) 6241 ts.PutCString (stop_desc); 6242 } 6243 ts.Printf(">"); 6244 } 6245 6246 event_explanation = ts.GetData(); 6247 } 6248 } while (0); 6249 6250 if (event_explanation) 6251 log->Printf("Process::RunThreadPlan(): execution interrupted: %s %s", s.GetData(), event_explanation); 6252 else 6253 log->Printf("Process::RunThreadPlan(): execution interrupted: %s", s.GetData()); 6254 } 6255 6256 if (should_unwind) 6257 { 6258 if (log) 6259 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - discarding thread plans up to %p.", 6260 static_cast<void*>(thread_plan_sp.get())); 6261 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6262 } 6263 else 6264 { 6265 if (log) 6266 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - for plan: %p not discarding.", 6267 static_cast<void*>(thread_plan_sp.get())); 6268 } 6269 } 6270 else if (return_value == eExpressionSetupError) 6271 { 6272 if (log) 6273 log->PutCString("Process::RunThreadPlan(): execution set up error."); 6274 6275 if (options.DoesUnwindOnError()) 6276 { 6277 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6278 } 6279 } 6280 else 6281 { 6282 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 6283 { 6284 if (log) 6285 log->PutCString("Process::RunThreadPlan(): thread plan is done"); 6286 return_value = eExpressionCompleted; 6287 } 6288 else if (thread->WasThreadPlanDiscarded (thread_plan_sp.get())) 6289 { 6290 if (log) 6291 log->PutCString("Process::RunThreadPlan(): thread plan was discarded"); 6292 return_value = eExpressionDiscarded; 6293 } 6294 else 6295 { 6296 if (log) 6297 log->PutCString("Process::RunThreadPlan(): thread plan stopped in mid course"); 6298 if (options.DoesUnwindOnError() && thread_plan_sp) 6299 { 6300 if (log) 6301 log->PutCString("Process::RunThreadPlan(): discarding thread plan 'cause unwind_on_error is set."); 6302 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 6303 } 6304 } 6305 } 6306 6307 // Thread we ran the function in may have gone away because we ran the target 6308 // Check that it's still there, and if it is put it back in the context. Also restore the 6309 // frame in the context if it is still present. 6310 thread = GetThreadList().FindThreadByIndexID(thread_idx_id, true).get(); 6311 if (thread) 6312 { 6313 exe_ctx.SetFrameSP (thread->GetFrameWithStackID (ctx_frame_id)); 6314 } 6315 6316 // Also restore the current process'es selected frame & thread, since this function calling may 6317 // be done behind the user's back. 6318 6319 if (selected_tid != LLDB_INVALID_THREAD_ID) 6320 { 6321 if (GetThreadList().SetSelectedThreadByIndexID (selected_tid) && selected_stack_id.IsValid()) 6322 { 6323 // We were able to restore the selected thread, now restore the frame: 6324 Mutex::Locker lock(GetThreadList().GetMutex()); 6325 StackFrameSP old_frame_sp = GetThreadList().GetSelectedThread()->GetFrameWithStackID(selected_stack_id); 6326 if (old_frame_sp) 6327 GetThreadList().GetSelectedThread()->SetSelectedFrame(old_frame_sp.get()); 6328 } 6329 } 6330 } 6331 6332 // If the process exited during the run of the thread plan, notify everyone. 6333 6334 if (event_to_broadcast_sp) 6335 { 6336 if (log) 6337 log->PutCString("Process::RunThreadPlan(): rebroadcasting event."); 6338 BroadcastEvent(event_to_broadcast_sp); 6339 } 6340 6341 return return_value; 6342 } 6343 6344 const char * 6345 Process::ExecutionResultAsCString (ExpressionResults result) 6346 { 6347 const char *result_name; 6348 6349 switch (result) 6350 { 6351 case eExpressionCompleted: 6352 result_name = "eExpressionCompleted"; 6353 break; 6354 case eExpressionDiscarded: 6355 result_name = "eExpressionDiscarded"; 6356 break; 6357 case eExpressionInterrupted: 6358 result_name = "eExpressionInterrupted"; 6359 break; 6360 case eExpressionHitBreakpoint: 6361 result_name = "eExpressionHitBreakpoint"; 6362 break; 6363 case eExpressionSetupError: 6364 result_name = "eExpressionSetupError"; 6365 break; 6366 case eExpressionParseError: 6367 result_name = "eExpressionParseError"; 6368 break; 6369 case eExpressionResultUnavailable: 6370 result_name = "eExpressionResultUnavailable"; 6371 break; 6372 case eExpressionTimedOut: 6373 result_name = "eExpressionTimedOut"; 6374 break; 6375 case eExpressionStoppedForDebug: 6376 result_name = "eExpressionStoppedForDebug"; 6377 break; 6378 } 6379 return result_name; 6380 } 6381 6382 void 6383 Process::GetStatus (Stream &strm) 6384 { 6385 const StateType state = GetState(); 6386 if (StateIsStoppedState(state, false)) 6387 { 6388 if (state == eStateExited) 6389 { 6390 int exit_status = GetExitStatus(); 6391 const char *exit_description = GetExitDescription(); 6392 strm.Printf ("Process %" PRIu64 " exited with status = %i (0x%8.8x) %s\n", 6393 GetID(), 6394 exit_status, 6395 exit_status, 6396 exit_description ? exit_description : ""); 6397 } 6398 else 6399 { 6400 if (state == eStateConnected) 6401 strm.Printf ("Connected to remote target.\n"); 6402 else 6403 strm.Printf ("Process %" PRIu64 " %s\n", GetID(), StateAsCString (state)); 6404 } 6405 } 6406 else 6407 { 6408 strm.Printf ("Process %" PRIu64 " is running.\n", GetID()); 6409 } 6410 } 6411 6412 size_t 6413 Process::GetThreadStatus (Stream &strm, 6414 bool only_threads_with_stop_reason, 6415 uint32_t start_frame, 6416 uint32_t num_frames, 6417 uint32_t num_frames_with_source) 6418 { 6419 size_t num_thread_infos_dumped = 0; 6420 6421 // You can't hold the thread list lock while calling Thread::GetStatus. That very well might run code (e.g. if we need it 6422 // to get return values or arguments.) For that to work the process has to be able to acquire it. So instead copy the thread 6423 // ID's, and look them up one by one: 6424 6425 uint32_t num_threads; 6426 std::vector<lldb::tid_t> thread_id_array; 6427 //Scope for thread list locker; 6428 { 6429 Mutex::Locker locker (GetThreadList().GetMutex()); 6430 ThreadList &curr_thread_list = GetThreadList(); 6431 num_threads = curr_thread_list.GetSize(); 6432 uint32_t idx; 6433 thread_id_array.resize(num_threads); 6434 for (idx = 0; idx < num_threads; ++idx) 6435 thread_id_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetID(); 6436 } 6437 6438 for (uint32_t i = 0; i < num_threads; i++) 6439 { 6440 ThreadSP thread_sp(GetThreadList().FindThreadByID(thread_id_array[i])); 6441 if (thread_sp) 6442 { 6443 if (only_threads_with_stop_reason) 6444 { 6445 StopInfoSP stop_info_sp = thread_sp->GetStopInfo(); 6446 if (stop_info_sp.get() == NULL || !stop_info_sp->IsValid()) 6447 continue; 6448 } 6449 thread_sp->GetStatus (strm, 6450 start_frame, 6451 num_frames, 6452 num_frames_with_source); 6453 ++num_thread_infos_dumped; 6454 } 6455 else 6456 { 6457 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 6458 if (log) 6459 log->Printf("Process::GetThreadStatus - thread 0x" PRIu64 " vanished while running Thread::GetStatus."); 6460 } 6461 } 6462 return num_thread_infos_dumped; 6463 } 6464 6465 void 6466 Process::AddInvalidMemoryRegion (const LoadRange ®ion) 6467 { 6468 m_memory_cache.AddInvalidRange(region.GetRangeBase(), region.GetByteSize()); 6469 } 6470 6471 bool 6472 Process::RemoveInvalidMemoryRange (const LoadRange ®ion) 6473 { 6474 return m_memory_cache.RemoveInvalidRange(region.GetRangeBase(), region.GetByteSize()); 6475 } 6476 6477 void 6478 Process::AddPreResumeAction (PreResumeActionCallback callback, void *baton) 6479 { 6480 m_pre_resume_actions.push_back(PreResumeCallbackAndBaton (callback, baton)); 6481 } 6482 6483 bool 6484 Process::RunPreResumeActions () 6485 { 6486 bool result = true; 6487 while (!m_pre_resume_actions.empty()) 6488 { 6489 struct PreResumeCallbackAndBaton action = m_pre_resume_actions.back(); 6490 m_pre_resume_actions.pop_back(); 6491 bool this_result = action.callback (action.baton); 6492 if (result == true) 6493 result = this_result; 6494 } 6495 return result; 6496 } 6497 6498 void 6499 Process::ClearPreResumeActions () 6500 { 6501 m_pre_resume_actions.clear(); 6502 } 6503 6504 ProcessRunLock & 6505 Process::GetRunLock() 6506 { 6507 if (m_private_state_thread.EqualsThread(Host::GetCurrentThread())) 6508 return m_private_run_lock; 6509 else 6510 return m_public_run_lock; 6511 } 6512 6513 void 6514 Process::Flush () 6515 { 6516 m_thread_list.Flush(); 6517 m_extended_thread_list.Flush(); 6518 m_extended_thread_stop_id = 0; 6519 m_queue_list.Clear(); 6520 m_queue_list_stop_id = 0; 6521 } 6522 6523 void 6524 Process::DidExec () 6525 { 6526 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 6527 if (log) 6528 log->Printf ("Process::%s()", __FUNCTION__); 6529 6530 Target &target = GetTarget(); 6531 target.CleanupProcess (); 6532 target.ClearModules(false); 6533 m_dynamic_checkers_ap.reset(); 6534 m_abi_sp.reset(); 6535 m_system_runtime_ap.reset(); 6536 m_os_ap.reset(); 6537 m_dyld_ap.reset(); 6538 m_jit_loaders_ap.reset(); 6539 m_image_tokens.clear(); 6540 m_allocated_memory_cache.Clear(); 6541 m_language_runtimes.clear(); 6542 m_instrumentation_runtimes.clear(); 6543 m_thread_list.DiscardThreadPlans(); 6544 m_memory_cache.Clear(true); 6545 m_stop_info_override_callback = NULL; 6546 DoDidExec(); 6547 CompleteAttach (); 6548 // Flush the process (threads and all stack frames) after running CompleteAttach() 6549 // in case the dynamic loader loaded things in new locations. 6550 Flush(); 6551 6552 // After we figure out what was loaded/unloaded in CompleteAttach, 6553 // we need to let the target know so it can do any cleanup it needs to. 6554 target.DidExec(); 6555 } 6556 6557 addr_t 6558 Process::ResolveIndirectFunction(const Address *address, Error &error) 6559 { 6560 if (address == nullptr) 6561 { 6562 error.SetErrorString("Invalid address argument"); 6563 return LLDB_INVALID_ADDRESS; 6564 } 6565 6566 addr_t function_addr = LLDB_INVALID_ADDRESS; 6567 6568 addr_t addr = address->GetLoadAddress(&GetTarget()); 6569 std::map<addr_t,addr_t>::const_iterator iter = m_resolved_indirect_addresses.find(addr); 6570 if (iter != m_resolved_indirect_addresses.end()) 6571 { 6572 function_addr = (*iter).second; 6573 } 6574 else 6575 { 6576 if (!InferiorCall(this, address, function_addr)) 6577 { 6578 Symbol *symbol = address->CalculateSymbolContextSymbol(); 6579 error.SetErrorStringWithFormat ("Unable to call resolver for indirect function %s", 6580 symbol ? symbol->GetName().AsCString() : "<UNKNOWN>"); 6581 function_addr = LLDB_INVALID_ADDRESS; 6582 } 6583 else 6584 { 6585 m_resolved_indirect_addresses.insert(std::pair<addr_t, addr_t>(addr, function_addr)); 6586 } 6587 } 6588 return function_addr; 6589 } 6590 6591 void 6592 Process::ModulesDidLoad (ModuleList &module_list) 6593 { 6594 SystemRuntime *sys_runtime = GetSystemRuntime(); 6595 if (sys_runtime) 6596 { 6597 sys_runtime->ModulesDidLoad (module_list); 6598 } 6599 6600 GetJITLoaders().ModulesDidLoad (module_list); 6601 6602 // Give runtimes a chance to be created. 6603 InstrumentationRuntime::ModulesDidLoad(module_list, this, m_instrumentation_runtimes); 6604 6605 // Tell runtimes about new modules. 6606 for (auto pos = m_instrumentation_runtimes.begin(); pos != m_instrumentation_runtimes.end(); ++pos) 6607 { 6608 InstrumentationRuntimeSP runtime = pos->second; 6609 runtime->ModulesDidLoad(module_list); 6610 } 6611 6612 // Let any language runtimes we have already created know 6613 // about the modules that loaded. 6614 6615 // Iterate over a copy of this language runtime list in case 6616 // the language runtime ModulesDidLoad somehow causes the language 6617 // riuntime to be unloaded. 6618 LanguageRuntimeCollection language_runtimes(m_language_runtimes); 6619 for (const auto &pair: language_runtimes) 6620 { 6621 // We must check language_runtime_sp to make sure it is not 6622 // NULL as we might cache the fact that we didn't have a 6623 // language runtime for a language. 6624 LanguageRuntimeSP language_runtime_sp = pair.second; 6625 if (language_runtime_sp) 6626 language_runtime_sp->ModulesDidLoad(module_list); 6627 } 6628 6629 LoadOperatingSystemPlugin(false); 6630 } 6631 6632 void 6633 Process::PrintWarning (uint64_t warning_type, void *repeat_key, const char *fmt, ...) 6634 { 6635 bool print_warning = true; 6636 6637 StreamSP stream_sp = GetTarget().GetDebugger().GetAsyncOutputStream(); 6638 if (stream_sp.get() == nullptr) 6639 return; 6640 if (warning_type == eWarningsOptimization 6641 && GetWarningsOptimization() == false) 6642 { 6643 return; 6644 } 6645 6646 if (repeat_key != nullptr) 6647 { 6648 WarningsCollection::iterator it = m_warnings_issued.find (warning_type); 6649 if (it == m_warnings_issued.end()) 6650 { 6651 m_warnings_issued[warning_type] = WarningsPointerSet(); 6652 m_warnings_issued[warning_type].insert (repeat_key); 6653 } 6654 else 6655 { 6656 if (it->second.find (repeat_key) != it->second.end()) 6657 { 6658 print_warning = false; 6659 } 6660 else 6661 { 6662 it->second.insert (repeat_key); 6663 } 6664 } 6665 } 6666 6667 if (print_warning) 6668 { 6669 va_list args; 6670 va_start (args, fmt); 6671 stream_sp->PrintfVarArg (fmt, args); 6672 va_end (args); 6673 } 6674 } 6675 6676 void 6677 Process::PrintWarningOptimization (const SymbolContext &sc) 6678 { 6679 if (GetWarningsOptimization() == true 6680 && sc.module_sp.get() 6681 && sc.module_sp->GetFileSpec().GetFilename().IsEmpty() == false 6682 && sc.function 6683 && sc.function->GetIsOptimized() == true) 6684 { 6685 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()); 6686 } 6687 } 6688 6689 ThreadCollectionSP 6690 Process::GetHistoryThreads(lldb::addr_t addr) 6691 { 6692 ThreadCollectionSP threads; 6693 6694 const MemoryHistorySP &memory_history = MemoryHistory::FindPlugin(shared_from_this()); 6695 6696 if (! memory_history.get()) { 6697 return threads; 6698 } 6699 6700 threads.reset(new ThreadCollection(memory_history->GetHistoryThreads(addr))); 6701 6702 return threads; 6703 } 6704 6705 InstrumentationRuntimeSP 6706 Process::GetInstrumentationRuntime(lldb::InstrumentationRuntimeType type) 6707 { 6708 InstrumentationRuntimeCollection::iterator pos; 6709 pos = m_instrumentation_runtimes.find (type); 6710 if (pos == m_instrumentation_runtimes.end()) 6711 { 6712 return InstrumentationRuntimeSP(); 6713 } 6714 else 6715 return (*pos).second; 6716 } 6717 6718 bool 6719 Process::GetModuleSpec(const FileSpec& module_file_spec, 6720 const ArchSpec& arch, 6721 ModuleSpec& module_spec) 6722 { 6723 module_spec.Clear(); 6724 return false; 6725 } 6726