1//===-- Process.cpp ---------------------------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10#include "lldb/lldb-python.h" 11 12#include "lldb/Target/Process.h" 13 14#include "lldb/lldb-private-log.h" 15 16#include "lldb/Breakpoint/StoppointCallbackContext.h" 17#include "lldb/Breakpoint/BreakpointLocation.h" 18#include "lldb/Core/Event.h" 19#include "lldb/Core/ConnectionFileDescriptor.h" 20#include "lldb/Core/Debugger.h" 21#include "lldb/Core/Log.h" 22#include "lldb/Core/Module.h" 23#include "lldb/Symbol/Symbol.h" 24#include "lldb/Core/PluginManager.h" 25#include "lldb/Core/State.h" 26#include "lldb/Core/StreamFile.h" 27#include "lldb/Expression/ClangUserExpression.h" 28#include "lldb/Interpreter/CommandInterpreter.h" 29#include "lldb/Host/Host.h" 30#include "lldb/Host/Terminal.h" 31#include "lldb/Target/ABI.h" 32#include "lldb/Target/DynamicLoader.h" 33#include "lldb/Target/OperatingSystem.h" 34#include "lldb/Target/LanguageRuntime.h" 35#include "lldb/Target/CPPLanguageRuntime.h" 36#include "lldb/Target/ObjCLanguageRuntime.h" 37#include "lldb/Target/Platform.h" 38#include "lldb/Target/RegisterContext.h" 39#include "lldb/Target/StopInfo.h" 40#include "lldb/Target/SystemRuntime.h" 41#include "lldb/Target/Target.h" 42#include "lldb/Target/TargetList.h" 43#include "lldb/Target/Thread.h" 44#include "lldb/Target/ThreadPlan.h" 45#include "lldb/Target/ThreadPlanBase.h" 46#include "Plugins/Process/Utility/InferiorCallPOSIX.h" 47 48#ifndef LLDB_DISABLE_POSIX 49#include <spawn.h> 50#endif 51 52using namespace lldb; 53using namespace lldb_private; 54 55 56// Comment out line below to disable memory caching, overriding the process setting 57// target.process.disable-memory-cache 58#define ENABLE_MEMORY_CACHING 59 60#ifdef ENABLE_MEMORY_CACHING 61#define DISABLE_MEM_CACHE_DEFAULT false 62#else 63#define DISABLE_MEM_CACHE_DEFAULT true 64#endif 65 66class ProcessOptionValueProperties : public OptionValueProperties 67{ 68public: 69 ProcessOptionValueProperties (const ConstString &name) : 70 OptionValueProperties (name) 71 { 72 } 73 74 // This constructor is used when creating ProcessOptionValueProperties when it 75 // is part of a new lldb_private::Process instance. It will copy all current 76 // global property values as needed 77 ProcessOptionValueProperties (ProcessProperties *global_properties) : 78 OptionValueProperties(*global_properties->GetValueProperties()) 79 { 80 } 81 82 virtual const Property * 83 GetPropertyAtIndex (const ExecutionContext *exe_ctx, bool will_modify, uint32_t idx) const 84 { 85 // When gettings the value for a key from the process options, we will always 86 // try and grab the setting from the current process if there is one. Else we just 87 // use the one from this instance. 88 if (exe_ctx) 89 { 90 Process *process = exe_ctx->GetProcessPtr(); 91 if (process) 92 { 93 ProcessOptionValueProperties *instance_properties = static_cast<ProcessOptionValueProperties *>(process->GetValueProperties().get()); 94 if (this != instance_properties) 95 return instance_properties->ProtectedGetPropertyAtIndex (idx); 96 } 97 } 98 return ProtectedGetPropertyAtIndex (idx); 99 } 100}; 101 102static PropertyDefinition 103g_properties[] = 104{ 105 { "disable-memory-cache" , OptionValue::eTypeBoolean, false, DISABLE_MEM_CACHE_DEFAULT, NULL, NULL, "Disable reading and caching of memory in fixed-size units." }, 106 { "extra-startup-command", OptionValue::eTypeArray , false, OptionValue::eTypeString, NULL, NULL, "A list containing extra commands understood by the particular process plugin used. " 107 "For instance, to turn on debugserver logging set this to \"QSetLogging:bitmask=LOG_DEFAULT;\"" }, 108 { "ignore-breakpoints-in-expressions", OptionValue::eTypeBoolean, true, true, NULL, NULL, "If true, breakpoints will be ignored during expression evaluation." }, 109 { "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." }, 110 { "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." }, 111 { "stop-on-sharedlibrary-events" , OptionValue::eTypeBoolean, true, false, NULL, NULL, "If true, stop when a shared library is loaded or unloaded." }, 112 { "detach-keeps-stopped" , OptionValue::eTypeBoolean, true, false, NULL, NULL, "If true, detach will attempt to keep the process stopped." }, 113 { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } 114}; 115 116enum { 117 ePropertyDisableMemCache, 118 ePropertyExtraStartCommand, 119 ePropertyIgnoreBreakpointsInExpressions, 120 ePropertyUnwindOnErrorInExpressions, 121 ePropertyPythonOSPluginPath, 122 ePropertyStopOnSharedLibraryEvents, 123 ePropertyDetachKeepsStopped 124}; 125 126ProcessProperties::ProcessProperties (bool is_global) : 127 Properties () 128{ 129 if (is_global) 130 { 131 m_collection_sp.reset (new ProcessOptionValueProperties(ConstString("process"))); 132 m_collection_sp->Initialize(g_properties); 133 m_collection_sp->AppendProperty(ConstString("thread"), 134 ConstString("Settings specific to threads."), 135 true, 136 Thread::GetGlobalProperties()->GetValueProperties()); 137 } 138 else 139 m_collection_sp.reset (new ProcessOptionValueProperties(Process::GetGlobalProperties().get())); 140} 141 142ProcessProperties::~ProcessProperties() 143{ 144} 145 146bool 147ProcessProperties::GetDisableMemoryCache() const 148{ 149 const uint32_t idx = ePropertyDisableMemCache; 150 return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0); 151} 152 153Args 154ProcessProperties::GetExtraStartupCommands () const 155{ 156 Args args; 157 const uint32_t idx = ePropertyExtraStartCommand; 158 m_collection_sp->GetPropertyAtIndexAsArgs(NULL, idx, args); 159 return args; 160} 161 162void 163ProcessProperties::SetExtraStartupCommands (const Args &args) 164{ 165 const uint32_t idx = ePropertyExtraStartCommand; 166 m_collection_sp->SetPropertyAtIndexFromArgs(NULL, idx, args); 167} 168 169FileSpec 170ProcessProperties::GetPythonOSPluginPath () const 171{ 172 const uint32_t idx = ePropertyPythonOSPluginPath; 173 return m_collection_sp->GetPropertyAtIndexAsFileSpec(NULL, idx); 174} 175 176void 177ProcessProperties::SetPythonOSPluginPath (const FileSpec &file) 178{ 179 const uint32_t idx = ePropertyPythonOSPluginPath; 180 m_collection_sp->SetPropertyAtIndexAsFileSpec(NULL, idx, file); 181} 182 183 184bool 185ProcessProperties::GetIgnoreBreakpointsInExpressions () const 186{ 187 const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions; 188 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 189} 190 191void 192ProcessProperties::SetIgnoreBreakpointsInExpressions (bool ignore) 193{ 194 const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions; 195 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, ignore); 196} 197 198bool 199ProcessProperties::GetUnwindOnErrorInExpressions () const 200{ 201 const uint32_t idx = ePropertyUnwindOnErrorInExpressions; 202 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 203} 204 205void 206ProcessProperties::SetUnwindOnErrorInExpressions (bool ignore) 207{ 208 const uint32_t idx = ePropertyUnwindOnErrorInExpressions; 209 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, ignore); 210} 211 212bool 213ProcessProperties::GetStopOnSharedLibraryEvents () const 214{ 215 const uint32_t idx = ePropertyStopOnSharedLibraryEvents; 216 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 217} 218 219void 220ProcessProperties::SetStopOnSharedLibraryEvents (bool stop) 221{ 222 const uint32_t idx = ePropertyStopOnSharedLibraryEvents; 223 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, stop); 224} 225 226bool 227ProcessProperties::GetDetachKeepsStopped () const 228{ 229 const uint32_t idx = ePropertyDetachKeepsStopped; 230 return m_collection_sp->GetPropertyAtIndexAsBoolean(NULL, idx, g_properties[idx].default_uint_value != 0); 231} 232 233void 234ProcessProperties::SetDetachKeepsStopped (bool stop) 235{ 236 const uint32_t idx = ePropertyDetachKeepsStopped; 237 m_collection_sp->SetPropertyAtIndexAsBoolean(NULL, idx, stop); 238} 239 240void 241ProcessInstanceInfo::Dump (Stream &s, Platform *platform) const 242{ 243 const char *cstr; 244 if (m_pid != LLDB_INVALID_PROCESS_ID) 245 s.Printf (" pid = %" PRIu64 "\n", m_pid); 246 247 if (m_parent_pid != LLDB_INVALID_PROCESS_ID) 248 s.Printf (" parent = %" PRIu64 "\n", m_parent_pid); 249 250 if (m_executable) 251 { 252 s.Printf (" name = %s\n", m_executable.GetFilename().GetCString()); 253 s.PutCString (" file = "); 254 m_executable.Dump(&s); 255 s.EOL(); 256 } 257 const uint32_t argc = m_arguments.GetArgumentCount(); 258 if (argc > 0) 259 { 260 for (uint32_t i=0; i<argc; i++) 261 { 262 const char *arg = m_arguments.GetArgumentAtIndex(i); 263 if (i < 10) 264 s.Printf (" arg[%u] = %s\n", i, arg); 265 else 266 s.Printf ("arg[%u] = %s\n", i, arg); 267 } 268 } 269 270 const uint32_t envc = m_environment.GetArgumentCount(); 271 if (envc > 0) 272 { 273 for (uint32_t i=0; i<envc; i++) 274 { 275 const char *env = m_environment.GetArgumentAtIndex(i); 276 if (i < 10) 277 s.Printf (" env[%u] = %s\n", i, env); 278 else 279 s.Printf ("env[%u] = %s\n", i, env); 280 } 281 } 282 283 if (m_arch.IsValid()) 284 s.Printf (" arch = %s\n", m_arch.GetTriple().str().c_str()); 285 286 if (m_uid != UINT32_MAX) 287 { 288 cstr = platform->GetUserName (m_uid); 289 s.Printf (" uid = %-5u (%s)\n", m_uid, cstr ? cstr : ""); 290 } 291 if (m_gid != UINT32_MAX) 292 { 293 cstr = platform->GetGroupName (m_gid); 294 s.Printf (" gid = %-5u (%s)\n", m_gid, cstr ? cstr : ""); 295 } 296 if (m_euid != UINT32_MAX) 297 { 298 cstr = platform->GetUserName (m_euid); 299 s.Printf (" euid = %-5u (%s)\n", m_euid, cstr ? cstr : ""); 300 } 301 if (m_egid != UINT32_MAX) 302 { 303 cstr = platform->GetGroupName (m_egid); 304 s.Printf (" egid = %-5u (%s)\n", m_egid, cstr ? cstr : ""); 305 } 306} 307 308void 309ProcessInstanceInfo::DumpTableHeader (Stream &s, Platform *platform, bool show_args, bool verbose) 310{ 311 const char *label; 312 if (show_args || verbose) 313 label = "ARGUMENTS"; 314 else 315 label = "NAME"; 316 317 if (verbose) 318 { 319 s.Printf ("PID PARENT USER GROUP EFF USER EFF GROUP TRIPLE %s\n", label); 320 s.PutCString ("====== ====== ========== ========== ========== ========== ======================== ============================\n"); 321 } 322 else 323 { 324 s.Printf ("PID PARENT USER ARCH %s\n", label); 325 s.PutCString ("====== ====== ========== ======= ============================\n"); 326 } 327} 328 329void 330ProcessInstanceInfo::DumpAsTableRow (Stream &s, Platform *platform, bool show_args, bool verbose) const 331{ 332 if (m_pid != LLDB_INVALID_PROCESS_ID) 333 { 334 const char *cstr; 335 s.Printf ("%-6" PRIu64 " %-6" PRIu64 " ", m_pid, m_parent_pid); 336 337 338 if (verbose) 339 { 340 cstr = platform->GetUserName (m_uid); 341 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 342 s.Printf ("%-10s ", cstr); 343 else 344 s.Printf ("%-10u ", m_uid); 345 346 cstr = platform->GetGroupName (m_gid); 347 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 348 s.Printf ("%-10s ", cstr); 349 else 350 s.Printf ("%-10u ", m_gid); 351 352 cstr = platform->GetUserName (m_euid); 353 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 354 s.Printf ("%-10s ", cstr); 355 else 356 s.Printf ("%-10u ", m_euid); 357 358 cstr = platform->GetGroupName (m_egid); 359 if (cstr && cstr[0]) // Watch for empty string that indicates lookup failed 360 s.Printf ("%-10s ", cstr); 361 else 362 s.Printf ("%-10u ", m_egid); 363 s.Printf ("%-24s ", m_arch.IsValid() ? m_arch.GetTriple().str().c_str() : ""); 364 } 365 else 366 { 367 s.Printf ("%-10s %-7d %s ", 368 platform->GetUserName (m_euid), 369 (int)m_arch.GetTriple().getArchName().size(), 370 m_arch.GetTriple().getArchName().data()); 371 } 372 373 if (verbose || show_args) 374 { 375 const uint32_t argc = m_arguments.GetArgumentCount(); 376 if (argc > 0) 377 { 378 for (uint32_t i=0; i<argc; i++) 379 { 380 if (i > 0) 381 s.PutChar (' '); 382 s.PutCString (m_arguments.GetArgumentAtIndex(i)); 383 } 384 } 385 } 386 else 387 { 388 s.PutCString (GetName()); 389 } 390 391 s.EOL(); 392 } 393} 394 395 396void 397ProcessInfo::SetArguments (char const **argv, bool first_arg_is_executable) 398{ 399 m_arguments.SetArguments (argv); 400 401 // Is the first argument the executable? 402 if (first_arg_is_executable) 403 { 404 const char *first_arg = m_arguments.GetArgumentAtIndex (0); 405 if (first_arg) 406 { 407 // Yes the first argument is an executable, set it as the executable 408 // in the launch options. Don't resolve the file path as the path 409 // could be a remote platform path 410 const bool resolve = false; 411 m_executable.SetFile(first_arg, resolve); 412 } 413 } 414} 415void 416ProcessInfo::SetArguments (const Args& args, bool first_arg_is_executable) 417{ 418 // Copy all arguments 419 m_arguments = args; 420 421 // Is the first argument the executable? 422 if (first_arg_is_executable) 423 { 424 const char *first_arg = m_arguments.GetArgumentAtIndex (0); 425 if (first_arg) 426 { 427 // Yes the first argument is an executable, set it as the executable 428 // in the launch options. Don't resolve the file path as the path 429 // could be a remote platform path 430 const bool resolve = false; 431 m_executable.SetFile(first_arg, resolve); 432 } 433 } 434} 435 436void 437ProcessLaunchInfo::FinalizeFileActions (Target *target, bool default_to_use_pty) 438{ 439 // If notthing was specified, then check the process for any default 440 // settings that were set with "settings set" 441 if (m_file_actions.empty()) 442 { 443 if (m_flags.Test(eLaunchFlagDisableSTDIO)) 444 { 445 AppendSuppressFileAction (STDIN_FILENO , true, false); 446 AppendSuppressFileAction (STDOUT_FILENO, false, true); 447 AppendSuppressFileAction (STDERR_FILENO, false, true); 448 } 449 else 450 { 451 // Check for any values that might have gotten set with any of: 452 // (lldb) settings set target.input-path 453 // (lldb) settings set target.output-path 454 // (lldb) settings set target.error-path 455 FileSpec in_path; 456 FileSpec out_path; 457 FileSpec err_path; 458 if (target) 459 { 460 in_path = target->GetStandardInputPath(); 461 out_path = target->GetStandardOutputPath(); 462 err_path = target->GetStandardErrorPath(); 463 } 464 465 if (in_path || out_path || err_path) 466 { 467 char path[PATH_MAX]; 468 if (in_path && in_path.GetPath(path, sizeof(path))) 469 AppendOpenFileAction(STDIN_FILENO, path, true, false); 470 471 if (out_path && out_path.GetPath(path, sizeof(path))) 472 AppendOpenFileAction(STDOUT_FILENO, path, false, true); 473 474 if (err_path && err_path.GetPath(path, sizeof(path))) 475 AppendOpenFileAction(STDERR_FILENO, path, false, true); 476 } 477 else if (default_to_use_pty) 478 { 479 if (m_pty.OpenFirstAvailableMaster (O_RDWR|O_NOCTTY, NULL, 0)) 480 { 481 const char *slave_path = m_pty.GetSlaveName (NULL, 0); 482 AppendOpenFileAction(STDIN_FILENO, slave_path, true, false); 483 AppendOpenFileAction(STDOUT_FILENO, slave_path, false, true); 484 AppendOpenFileAction(STDERR_FILENO, slave_path, false, true); 485 } 486 } 487 } 488 } 489} 490 491 492bool 493ProcessLaunchInfo::ConvertArgumentsForLaunchingInShell (Error &error, 494 bool localhost, 495 bool will_debug, 496 bool first_arg_is_full_shell_command, 497 int32_t num_resumes) 498{ 499 error.Clear(); 500 501 if (GetFlags().Test (eLaunchFlagLaunchInShell)) 502 { 503 const char *shell_executable = GetShell(); 504 if (shell_executable) 505 { 506 char shell_resolved_path[PATH_MAX]; 507 508 if (localhost) 509 { 510 FileSpec shell_filespec (shell_executable, true); 511 512 if (!shell_filespec.Exists()) 513 { 514 // Resolve the path in case we just got "bash", "sh" or "tcsh" 515 if (!shell_filespec.ResolveExecutableLocation ()) 516 { 517 error.SetErrorStringWithFormat("invalid shell path '%s'", shell_executable); 518 return false; 519 } 520 } 521 shell_filespec.GetPath (shell_resolved_path, sizeof(shell_resolved_path)); 522 shell_executable = shell_resolved_path; 523 } 524 525 const char **argv = GetArguments().GetConstArgumentVector (); 526 if (argv == NULL || argv[0] == NULL) 527 return false; 528 Args shell_arguments; 529 std::string safe_arg; 530 shell_arguments.AppendArgument (shell_executable); 531 shell_arguments.AppendArgument ("-c"); 532 StreamString shell_command; 533 if (will_debug) 534 { 535 // Add a modified PATH environment variable in case argv[0] 536 // is a relative path 537 const char *argv0 = argv[0]; 538 if (argv0 && (argv0[0] != '/' && argv0[0] != '~')) 539 { 540 // We have a relative path to our executable which may not work if 541 // we just try to run "a.out" (without it being converted to "./a.out") 542 const char *working_dir = GetWorkingDirectory(); 543 // Be sure to put quotes around PATH's value in case any paths have spaces... 544 std::string new_path("PATH=\""); 545 const size_t empty_path_len = new_path.size(); 546 547 if (working_dir && working_dir[0]) 548 { 549 new_path += working_dir; 550 } 551 else 552 { 553 char current_working_dir[PATH_MAX]; 554 const char *cwd = getcwd(current_working_dir, sizeof(current_working_dir)); 555 if (cwd && cwd[0]) 556 new_path += cwd; 557 } 558 const char *curr_path = getenv("PATH"); 559 if (curr_path) 560 { 561 if (new_path.size() > empty_path_len) 562 new_path += ':'; 563 new_path += curr_path; 564 } 565 new_path += "\" "; 566 shell_command.PutCString(new_path.c_str()); 567 } 568 569 shell_command.PutCString ("exec"); 570 571 // Only Apple supports /usr/bin/arch being able to specify the architecture 572 if (GetArchitecture().IsValid()) 573 { 574 shell_command.Printf(" /usr/bin/arch -arch %s", GetArchitecture().GetArchitectureName()); 575 // Set the resume count to 2: 576 // 1 - stop in shell 577 // 2 - stop in /usr/bin/arch 578 // 3 - then we will stop in our program 579 SetResumeCount(num_resumes + 1); 580 } 581 else 582 { 583 // Set the resume count to 1: 584 // 1 - stop in shell 585 // 2 - then we will stop in our program 586 SetResumeCount(num_resumes); 587 } 588 } 589 590 if (first_arg_is_full_shell_command) 591 { 592 // There should only be one argument that is the shell command itself to be used as is 593 if (argv[0] && !argv[1]) 594 shell_command.Printf("%s", argv[0]); 595 else 596 return false; 597 } 598 else 599 { 600 for (size_t i=0; argv[i] != NULL; ++i) 601 { 602 const char *arg = Args::GetShellSafeArgument (argv[i], safe_arg); 603 shell_command.Printf(" %s", arg); 604 } 605 } 606 shell_arguments.AppendArgument (shell_command.GetString().c_str()); 607 m_executable.SetFile(shell_executable, false); 608 m_arguments = shell_arguments; 609 return true; 610 } 611 else 612 { 613 error.SetErrorString ("invalid shell path"); 614 } 615 } 616 else 617 { 618 error.SetErrorString ("not launching in shell"); 619 } 620 return false; 621} 622 623 624bool 625ProcessLaunchInfo::FileAction::Open (int fd, const char *path, bool read, bool write) 626{ 627 if ((read || write) && fd >= 0 && path && path[0]) 628 { 629 m_action = eFileActionOpen; 630 m_fd = fd; 631 if (read && write) 632 m_arg = O_NOCTTY | O_CREAT | O_RDWR; 633 else if (read) 634 m_arg = O_NOCTTY | O_RDONLY; 635 else 636 m_arg = O_NOCTTY | O_CREAT | O_WRONLY; 637 m_path.assign (path); 638 return true; 639 } 640 else 641 { 642 Clear(); 643 } 644 return false; 645} 646 647bool 648ProcessLaunchInfo::FileAction::Close (int fd) 649{ 650 Clear(); 651 if (fd >= 0) 652 { 653 m_action = eFileActionClose; 654 m_fd = fd; 655 } 656 return m_fd >= 0; 657} 658 659 660bool 661ProcessLaunchInfo::FileAction::Duplicate (int fd, int dup_fd) 662{ 663 Clear(); 664 if (fd >= 0 && dup_fd >= 0) 665 { 666 m_action = eFileActionDuplicate; 667 m_fd = fd; 668 m_arg = dup_fd; 669 } 670 return m_fd >= 0; 671} 672 673 674 675#ifndef LLDB_DISABLE_POSIX 676bool 677ProcessLaunchInfo::FileAction::AddPosixSpawnFileAction (void *_file_actions, 678 const FileAction *info, 679 Log *log, 680 Error& error) 681{ 682 if (info == NULL) 683 return false; 684 685 posix_spawn_file_actions_t *file_actions = reinterpret_cast<posix_spawn_file_actions_t *>(_file_actions); 686 687 switch (info->m_action) 688 { 689 case eFileActionNone: 690 error.Clear(); 691 break; 692 693 case eFileActionClose: 694 if (info->m_fd == -1) 695 error.SetErrorString ("invalid fd for posix_spawn_file_actions_addclose(...)"); 696 else 697 { 698 error.SetError (::posix_spawn_file_actions_addclose (file_actions, info->m_fd), 699 eErrorTypePOSIX); 700 if (log && (error.Fail() || log)) 701 error.PutToLog(log, "posix_spawn_file_actions_addclose (action=%p, fd=%i)", 702 file_actions, info->m_fd); 703 } 704 break; 705 706 case eFileActionDuplicate: 707 if (info->m_fd == -1) 708 error.SetErrorString ("invalid fd for posix_spawn_file_actions_adddup2(...)"); 709 else if (info->m_arg == -1) 710 error.SetErrorString ("invalid duplicate fd for posix_spawn_file_actions_adddup2(...)"); 711 else 712 { 713 error.SetError (::posix_spawn_file_actions_adddup2 (file_actions, info->m_fd, info->m_arg), 714 eErrorTypePOSIX); 715 if (log && (error.Fail() || log)) 716 error.PutToLog(log, "posix_spawn_file_actions_adddup2 (action=%p, fd=%i, dup_fd=%i)", 717 file_actions, info->m_fd, info->m_arg); 718 } 719 break; 720 721 case eFileActionOpen: 722 if (info->m_fd == -1) 723 error.SetErrorString ("invalid fd in posix_spawn_file_actions_addopen(...)"); 724 else 725 { 726 int oflag = info->m_arg; 727 728 mode_t mode = 0; 729 730 if (oflag & O_CREAT) 731 mode = 0640; 732 733 error.SetError (::posix_spawn_file_actions_addopen (file_actions, 734 info->m_fd, 735 info->m_path.c_str(), 736 oflag, 737 mode), 738 eErrorTypePOSIX); 739 if (error.Fail() || log) 740 error.PutToLog(log, 741 "posix_spawn_file_actions_addopen (action=%p, fd=%i, path='%s', oflag=%i, mode=%i)", 742 file_actions, info->m_fd, info->m_path.c_str(), oflag, mode); 743 } 744 break; 745 } 746 return error.Success(); 747} 748#endif 749 750Error 751ProcessLaunchCommandOptions::SetOptionValue (uint32_t option_idx, const char *option_arg) 752{ 753 Error error; 754 const int short_option = m_getopt_table[option_idx].val; 755 756 switch (short_option) 757 { 758 case 's': // Stop at program entry point 759 launch_info.GetFlags().Set (eLaunchFlagStopAtEntry); 760 break; 761 762 case 'i': // STDIN for read only 763 { 764 ProcessLaunchInfo::FileAction action; 765 if (action.Open (STDIN_FILENO, option_arg, true, false)) 766 launch_info.AppendFileAction (action); 767 } 768 break; 769 770 case 'o': // Open STDOUT for write only 771 { 772 ProcessLaunchInfo::FileAction action; 773 if (action.Open (STDOUT_FILENO, option_arg, false, true)) 774 launch_info.AppendFileAction (action); 775 } 776 break; 777 778 case 'e': // STDERR for write only 779 { 780 ProcessLaunchInfo::FileAction action; 781 if (action.Open (STDERR_FILENO, option_arg, false, true)) 782 launch_info.AppendFileAction (action); 783 } 784 break; 785 786 787 case 'p': // Process plug-in name 788 launch_info.SetProcessPluginName (option_arg); 789 break; 790 791 case 'n': // Disable STDIO 792 { 793 ProcessLaunchInfo::FileAction action; 794 if (action.Open (STDIN_FILENO, "/dev/null", true, false)) 795 launch_info.AppendFileAction (action); 796 if (action.Open (STDOUT_FILENO, "/dev/null", false, true)) 797 launch_info.AppendFileAction (action); 798 if (action.Open (STDERR_FILENO, "/dev/null", false, true)) 799 launch_info.AppendFileAction (action); 800 } 801 break; 802 803 case 'w': 804 launch_info.SetWorkingDirectory (option_arg); 805 break; 806 807 case 't': // Open process in new terminal window 808 launch_info.GetFlags().Set (eLaunchFlagLaunchInTTY); 809 break; 810 811 case 'a': 812 if (!launch_info.GetArchitecture().SetTriple (option_arg, m_interpreter.GetPlatform(true).get())) 813 launch_info.GetArchitecture().SetTriple (option_arg); 814 break; 815 816 case 'A': 817 launch_info.GetFlags().Set (eLaunchFlagDisableASLR); 818 break; 819 820 case 'c': 821 if (option_arg && option_arg[0]) 822 launch_info.SetShell (option_arg); 823 else 824 launch_info.SetShell (LLDB_DEFAULT_SHELL); 825 break; 826 827 case 'v': 828 launch_info.GetEnvironmentEntries().AppendArgument(option_arg); 829 break; 830 831 default: 832 error.SetErrorStringWithFormat("unrecognized short option character '%c'", short_option); 833 break; 834 835 } 836 return error; 837} 838 839OptionDefinition 840ProcessLaunchCommandOptions::g_option_table[] = 841{ 842{ LLDB_OPT_SET_ALL, false, "stop-at-entry", 's', OptionParser::eNoArgument, NULL, 0, eArgTypeNone, "Stop at the entry point of the program when launching a process."}, 843{ LLDB_OPT_SET_ALL, false, "disable-aslr", 'A', OptionParser::eNoArgument, NULL, 0, eArgTypeNone, "Disable address space layout randomization when launching a process."}, 844{ LLDB_OPT_SET_ALL, false, "plugin", 'p', OptionParser::eRequiredArgument, NULL, 0, eArgTypePlugin, "Name of the process plugin you want to use."}, 845{ LLDB_OPT_SET_ALL, false, "working-dir", 'w', OptionParser::eRequiredArgument, NULL, 0, eArgTypeDirectoryName, "Set the current working directory to <path> when running the inferior."}, 846{ LLDB_OPT_SET_ALL, false, "arch", 'a', OptionParser::eRequiredArgument, NULL, 0, eArgTypeArchitecture, "Set the architecture for the process to launch when ambiguous."}, 847{ LLDB_OPT_SET_ALL, false, "environment", 'v', OptionParser::eRequiredArgument, NULL, 0, eArgTypeNone, "Specify an environment variable name/value string (--environment NAME=VALUE). Can be specified multiple times for subsequent environment entries."}, 848{ LLDB_OPT_SET_ALL, false, "shell", 'c', OptionParser::eOptionalArgument, NULL, 0, eArgTypeFilename, "Run the process in a shell (not supported on all platforms)."}, 849 850{ LLDB_OPT_SET_1 , false, "stdin", 'i', OptionParser::eRequiredArgument, NULL, 0, eArgTypeFilename, "Redirect stdin for the process to <filename>."}, 851{ LLDB_OPT_SET_1 , false, "stdout", 'o', OptionParser::eRequiredArgument, NULL, 0, eArgTypeFilename, "Redirect stdout for the process to <filename>."}, 852{ LLDB_OPT_SET_1 , false, "stderr", 'e', OptionParser::eRequiredArgument, NULL, 0, eArgTypeFilename, "Redirect stderr for the process to <filename>."}, 853 854{ LLDB_OPT_SET_2 , false, "tty", 't', OptionParser::eNoArgument, NULL, 0, eArgTypeNone, "Start the process in a terminal (not supported on all platforms)."}, 855 856{ LLDB_OPT_SET_3 , false, "no-stdio", 'n', OptionParser::eNoArgument, NULL, 0, eArgTypeNone, "Do not set up for terminal I/O to go to running process."}, 857 858{ 0 , false, NULL, 0, 0, NULL, 0, eArgTypeNone, NULL } 859}; 860 861 862 863bool 864ProcessInstanceInfoMatch::NameMatches (const char *process_name) const 865{ 866 if (m_name_match_type == eNameMatchIgnore || process_name == NULL) 867 return true; 868 const char *match_name = m_match_info.GetName(); 869 if (!match_name) 870 return true; 871 872 return lldb_private::NameMatches (process_name, m_name_match_type, match_name); 873} 874 875bool 876ProcessInstanceInfoMatch::Matches (const ProcessInstanceInfo &proc_info) const 877{ 878 if (!NameMatches (proc_info.GetName())) 879 return false; 880 881 if (m_match_info.ProcessIDIsValid() && 882 m_match_info.GetProcessID() != proc_info.GetProcessID()) 883 return false; 884 885 if (m_match_info.ParentProcessIDIsValid() && 886 m_match_info.GetParentProcessID() != proc_info.GetParentProcessID()) 887 return false; 888 889 if (m_match_info.UserIDIsValid () && 890 m_match_info.GetUserID() != proc_info.GetUserID()) 891 return false; 892 893 if (m_match_info.GroupIDIsValid () && 894 m_match_info.GetGroupID() != proc_info.GetGroupID()) 895 return false; 896 897 if (m_match_info.EffectiveUserIDIsValid () && 898 m_match_info.GetEffectiveUserID() != proc_info.GetEffectiveUserID()) 899 return false; 900 901 if (m_match_info.EffectiveGroupIDIsValid () && 902 m_match_info.GetEffectiveGroupID() != proc_info.GetEffectiveGroupID()) 903 return false; 904 905 if (m_match_info.GetArchitecture().IsValid() && 906 !m_match_info.GetArchitecture().IsCompatibleMatch(proc_info.GetArchitecture())) 907 return false; 908 return true; 909} 910 911bool 912ProcessInstanceInfoMatch::MatchAllProcesses () const 913{ 914 if (m_name_match_type != eNameMatchIgnore) 915 return false; 916 917 if (m_match_info.ProcessIDIsValid()) 918 return false; 919 920 if (m_match_info.ParentProcessIDIsValid()) 921 return false; 922 923 if (m_match_info.UserIDIsValid ()) 924 return false; 925 926 if (m_match_info.GroupIDIsValid ()) 927 return false; 928 929 if (m_match_info.EffectiveUserIDIsValid ()) 930 return false; 931 932 if (m_match_info.EffectiveGroupIDIsValid ()) 933 return false; 934 935 if (m_match_info.GetArchitecture().IsValid()) 936 return false; 937 938 if (m_match_all_users) 939 return false; 940 941 return true; 942 943} 944 945void 946ProcessInstanceInfoMatch::Clear() 947{ 948 m_match_info.Clear(); 949 m_name_match_type = eNameMatchIgnore; 950 m_match_all_users = false; 951} 952 953ProcessSP 954Process::FindPlugin (Target &target, const char *plugin_name, Listener &listener, const FileSpec *crash_file_path) 955{ 956 static uint32_t g_process_unique_id = 0; 957 958 ProcessSP process_sp; 959 ProcessCreateInstance create_callback = NULL; 960 if (plugin_name) 961 { 962 ConstString const_plugin_name(plugin_name); 963 create_callback = PluginManager::GetProcessCreateCallbackForPluginName (const_plugin_name); 964 if (create_callback) 965 { 966 process_sp = create_callback(target, listener, crash_file_path); 967 if (process_sp) 968 { 969 if (process_sp->CanDebug(target, true)) 970 { 971 process_sp->m_process_unique_id = ++g_process_unique_id; 972 } 973 else 974 process_sp.reset(); 975 } 976 } 977 } 978 else 979 { 980 for (uint32_t idx = 0; (create_callback = PluginManager::GetProcessCreateCallbackAtIndex(idx)) != NULL; ++idx) 981 { 982 process_sp = create_callback(target, listener, crash_file_path); 983 if (process_sp) 984 { 985 if (process_sp->CanDebug(target, false)) 986 { 987 process_sp->m_process_unique_id = ++g_process_unique_id; 988 break; 989 } 990 else 991 process_sp.reset(); 992 } 993 } 994 } 995 return process_sp; 996} 997 998ConstString & 999Process::GetStaticBroadcasterClass () 1000{ 1001 static ConstString class_name ("lldb.process"); 1002 return class_name; 1003} 1004 1005//---------------------------------------------------------------------- 1006// Process constructor 1007//---------------------------------------------------------------------- 1008Process::Process(Target &target, Listener &listener) : 1009 ProcessProperties (false), 1010 UserID (LLDB_INVALID_PROCESS_ID), 1011 Broadcaster (&(target.GetDebugger()), "lldb.process"), 1012 m_target (target), 1013 m_public_state (eStateUnloaded), 1014 m_private_state (eStateUnloaded), 1015 m_private_state_broadcaster (NULL, "lldb.process.internal_state_broadcaster"), 1016 m_private_state_control_broadcaster (NULL, "lldb.process.internal_state_control_broadcaster"), 1017 m_private_state_listener ("lldb.process.internal_state_listener"), 1018 m_private_state_control_wait(), 1019 m_private_state_thread (LLDB_INVALID_HOST_THREAD), 1020 m_mod_id (), 1021 m_process_unique_id(0), 1022 m_thread_index_id (0), 1023 m_thread_id_to_index_id_map (), 1024 m_exit_status (-1), 1025 m_exit_string (), 1026 m_thread_mutex (Mutex::eMutexTypeRecursive), 1027 m_thread_list_real (this), 1028 m_thread_list (this), 1029 m_extended_thread_list (this), 1030 m_extended_thread_stop_id (0), 1031 m_queue_list (this), 1032 m_queue_list_stop_id (0), 1033 m_notifications (), 1034 m_image_tokens (), 1035 m_listener (listener), 1036 m_breakpoint_site_list (), 1037 m_dynamic_checkers_ap (), 1038 m_unix_signals (), 1039 m_abi_sp (), 1040 m_process_input_reader (), 1041 m_stdio_communication ("process.stdio"), 1042 m_stdio_communication_mutex (Mutex::eMutexTypeRecursive), 1043 m_stdout_data (), 1044 m_stderr_data (), 1045 m_profile_data_comm_mutex (Mutex::eMutexTypeRecursive), 1046 m_profile_data (), 1047 m_memory_cache (*this), 1048 m_allocated_memory_cache (*this), 1049 m_should_detach (false), 1050 m_next_event_action_ap(), 1051 m_public_run_lock (), 1052 m_private_run_lock (), 1053 m_currently_handling_event(false), 1054 m_finalize_called(false), 1055 m_clear_thread_plans_on_stop (false), 1056 m_force_next_event_delivery(false), 1057 m_last_broadcast_state (eStateInvalid), 1058 m_destroy_in_process (false), 1059 m_can_jit(eCanJITDontKnow) 1060{ 1061 CheckInWithManager (); 1062 1063 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 1064 if (log) 1065 log->Printf ("%p Process::Process()", this); 1066 1067 SetEventName (eBroadcastBitStateChanged, "state-changed"); 1068 SetEventName (eBroadcastBitInterrupt, "interrupt"); 1069 SetEventName (eBroadcastBitSTDOUT, "stdout-available"); 1070 SetEventName (eBroadcastBitSTDERR, "stderr-available"); 1071 SetEventName (eBroadcastBitProfileData, "profile-data-available"); 1072 1073 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlStop , "control-stop" ); 1074 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlPause , "control-pause" ); 1075 m_private_state_control_broadcaster.SetEventName (eBroadcastInternalStateControlResume, "control-resume"); 1076 1077 listener.StartListeningForEvents (this, 1078 eBroadcastBitStateChanged | 1079 eBroadcastBitInterrupt | 1080 eBroadcastBitSTDOUT | 1081 eBroadcastBitSTDERR | 1082 eBroadcastBitProfileData); 1083 1084 m_private_state_listener.StartListeningForEvents(&m_private_state_broadcaster, 1085 eBroadcastBitStateChanged | 1086 eBroadcastBitInterrupt); 1087 1088 m_private_state_listener.StartListeningForEvents(&m_private_state_control_broadcaster, 1089 eBroadcastInternalStateControlStop | 1090 eBroadcastInternalStateControlPause | 1091 eBroadcastInternalStateControlResume); 1092} 1093 1094//---------------------------------------------------------------------- 1095// Destructor 1096//---------------------------------------------------------------------- 1097Process::~Process() 1098{ 1099 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 1100 if (log) 1101 log->Printf ("%p Process::~Process()", this); 1102 StopPrivateStateThread(); 1103} 1104 1105const ProcessPropertiesSP & 1106Process::GetGlobalProperties() 1107{ 1108 static ProcessPropertiesSP g_settings_sp; 1109 if (!g_settings_sp) 1110 g_settings_sp.reset (new ProcessProperties (true)); 1111 return g_settings_sp; 1112} 1113 1114void 1115Process::Finalize() 1116{ 1117 switch (GetPrivateState()) 1118 { 1119 case eStateConnected: 1120 case eStateAttaching: 1121 case eStateLaunching: 1122 case eStateStopped: 1123 case eStateRunning: 1124 case eStateStepping: 1125 case eStateCrashed: 1126 case eStateSuspended: 1127 if (GetShouldDetach()) 1128 { 1129 // FIXME: This will have to be a process setting: 1130 bool keep_stopped = false; 1131 Detach(keep_stopped); 1132 } 1133 else 1134 Destroy(); 1135 break; 1136 1137 case eStateInvalid: 1138 case eStateUnloaded: 1139 case eStateDetached: 1140 case eStateExited: 1141 break; 1142 } 1143 1144 // Clear our broadcaster before we proceed with destroying 1145 Broadcaster::Clear(); 1146 1147 // Do any cleanup needed prior to being destructed... Subclasses 1148 // that override this method should call this superclass method as well. 1149 1150 // We need to destroy the loader before the derived Process class gets destroyed 1151 // since it is very likely that undoing the loader will require access to the real process. 1152 m_dynamic_checkers_ap.reset(); 1153 m_abi_sp.reset(); 1154 m_os_ap.reset(); 1155 m_system_runtime_ap.reset(); 1156 m_dyld_ap.reset(); 1157 m_thread_list_real.Destroy(); 1158 m_thread_list.Destroy(); 1159 m_extended_thread_list.Destroy(); 1160 m_queue_list.Clear(); 1161 m_queue_list_stop_id = 0; 1162 std::vector<Notifications> empty_notifications; 1163 m_notifications.swap(empty_notifications); 1164 m_image_tokens.clear(); 1165 m_memory_cache.Clear(); 1166 m_allocated_memory_cache.Clear(); 1167 m_language_runtimes.clear(); 1168 m_next_event_action_ap.reset(); 1169//#ifdef LLDB_CONFIGURATION_DEBUG 1170// StreamFile s(stdout, false); 1171// EventSP event_sp; 1172// while (m_private_state_listener.GetNextEvent(event_sp)) 1173// { 1174// event_sp->Dump (&s); 1175// s.EOL(); 1176// } 1177//#endif 1178 // We have to be very careful here as the m_private_state_listener might 1179 // contain events that have ProcessSP values in them which can keep this 1180 // process around forever. These events need to be cleared out. 1181 m_private_state_listener.Clear(); 1182 m_public_run_lock.TrySetRunning(); // This will do nothing if already locked 1183 m_public_run_lock.SetStopped(); 1184 m_private_run_lock.TrySetRunning(); // This will do nothing if already locked 1185 m_private_run_lock.SetStopped(); 1186 m_finalize_called = true; 1187} 1188 1189void 1190Process::RegisterNotificationCallbacks (const Notifications& callbacks) 1191{ 1192 m_notifications.push_back(callbacks); 1193 if (callbacks.initialize != NULL) 1194 callbacks.initialize (callbacks.baton, this); 1195} 1196 1197bool 1198Process::UnregisterNotificationCallbacks(const Notifications& callbacks) 1199{ 1200 std::vector<Notifications>::iterator pos, end = m_notifications.end(); 1201 for (pos = m_notifications.begin(); pos != end; ++pos) 1202 { 1203 if (pos->baton == callbacks.baton && 1204 pos->initialize == callbacks.initialize && 1205 pos->process_state_changed == callbacks.process_state_changed) 1206 { 1207 m_notifications.erase(pos); 1208 return true; 1209 } 1210 } 1211 return false; 1212} 1213 1214void 1215Process::SynchronouslyNotifyStateChanged (StateType state) 1216{ 1217 std::vector<Notifications>::iterator notification_pos, notification_end = m_notifications.end(); 1218 for (notification_pos = m_notifications.begin(); notification_pos != notification_end; ++notification_pos) 1219 { 1220 if (notification_pos->process_state_changed) 1221 notification_pos->process_state_changed (notification_pos->baton, this, state); 1222 } 1223} 1224 1225// FIXME: We need to do some work on events before the general Listener sees them. 1226// For instance if we are continuing from a breakpoint, we need to ensure that we do 1227// the little "insert real insn, step & stop" trick. But we can't do that when the 1228// event is delivered by the broadcaster - since that is done on the thread that is 1229// waiting for new events, so if we needed more than one event for our handling, we would 1230// stall. So instead we do it when we fetch the event off of the queue. 1231// 1232 1233StateType 1234Process::GetNextEvent (EventSP &event_sp) 1235{ 1236 StateType state = eStateInvalid; 1237 1238 if (m_listener.GetNextEventForBroadcaster (this, event_sp) && event_sp) 1239 state = Process::ProcessEventData::GetStateFromEvent (event_sp.get()); 1240 1241 return state; 1242} 1243 1244 1245StateType 1246Process::WaitForProcessToStop (const TimeValue *timeout, lldb::EventSP *event_sp_ptr, bool wait_always, Listener *hijack_listener) 1247{ 1248 // We can't just wait for a "stopped" event, because the stopped event may have restarted the target. 1249 // We have to actually check each event, and in the case of a stopped event check the restarted flag 1250 // on the event. 1251 if (event_sp_ptr) 1252 event_sp_ptr->reset(); 1253 StateType state = GetState(); 1254 // If we are exited or detached, we won't ever get back to any 1255 // other valid state... 1256 if (state == eStateDetached || state == eStateExited) 1257 return state; 1258 1259 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1260 if (log) 1261 log->Printf ("Process::%s (timeout = %p)", __FUNCTION__, timeout); 1262 1263 if (!wait_always && 1264 StateIsStoppedState(state, true) && 1265 StateIsStoppedState(GetPrivateState(), true)) { 1266 if (log) 1267 log->Printf("Process::%s returning without waiting for events; process private and public states are already 'stopped'.", 1268 __FUNCTION__); 1269 return state; 1270 } 1271 1272 while (state != eStateInvalid) 1273 { 1274 EventSP event_sp; 1275 state = WaitForStateChangedEvents (timeout, event_sp, hijack_listener); 1276 if (event_sp_ptr && event_sp) 1277 *event_sp_ptr = event_sp; 1278 1279 switch (state) 1280 { 1281 case eStateCrashed: 1282 case eStateDetached: 1283 case eStateExited: 1284 case eStateUnloaded: 1285 // We need to toggle the run lock as this won't get done in 1286 // SetPublicState() if the process is hijacked. 1287 if (hijack_listener) 1288 m_public_run_lock.SetStopped(); 1289 return state; 1290 case eStateStopped: 1291 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 1292 continue; 1293 else 1294 { 1295 // We need to toggle the run lock as this won't get done in 1296 // SetPublicState() if the process is hijacked. 1297 if (hijack_listener) 1298 m_public_run_lock.SetStopped(); 1299 return state; 1300 } 1301 default: 1302 continue; 1303 } 1304 } 1305 return state; 1306} 1307 1308 1309StateType 1310Process::WaitForState 1311( 1312 const TimeValue *timeout, 1313 const StateType *match_states, 1314 const uint32_t num_match_states 1315) 1316{ 1317 EventSP event_sp; 1318 uint32_t i; 1319 StateType state = GetState(); 1320 while (state != eStateInvalid) 1321 { 1322 // If we are exited or detached, we won't ever get back to any 1323 // other valid state... 1324 if (state == eStateDetached || state == eStateExited) 1325 return state; 1326 1327 state = WaitForStateChangedEvents (timeout, event_sp, NULL); 1328 1329 for (i=0; i<num_match_states; ++i) 1330 { 1331 if (match_states[i] == state) 1332 return state; 1333 } 1334 } 1335 return state; 1336} 1337 1338bool 1339Process::HijackProcessEvents (Listener *listener) 1340{ 1341 if (listener != NULL) 1342 { 1343 return HijackBroadcaster(listener, eBroadcastBitStateChanged | eBroadcastBitInterrupt); 1344 } 1345 else 1346 return false; 1347} 1348 1349void 1350Process::RestoreProcessEvents () 1351{ 1352 RestoreBroadcaster(); 1353} 1354 1355bool 1356Process::HijackPrivateProcessEvents (Listener *listener) 1357{ 1358 if (listener != NULL) 1359 { 1360 return m_private_state_broadcaster.HijackBroadcaster(listener, eBroadcastBitStateChanged | eBroadcastBitInterrupt); 1361 } 1362 else 1363 return false; 1364} 1365 1366void 1367Process::RestorePrivateProcessEvents () 1368{ 1369 m_private_state_broadcaster.RestoreBroadcaster(); 1370} 1371 1372StateType 1373Process::WaitForStateChangedEvents (const TimeValue *timeout, EventSP &event_sp, Listener *hijack_listener) 1374{ 1375 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1376 1377 if (log) 1378 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, timeout); 1379 1380 Listener *listener = hijack_listener; 1381 if (listener == NULL) 1382 listener = &m_listener; 1383 1384 StateType state = eStateInvalid; 1385 if (listener->WaitForEventForBroadcasterWithType (timeout, 1386 this, 1387 eBroadcastBitStateChanged | eBroadcastBitInterrupt, 1388 event_sp)) 1389 { 1390 if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged) 1391 state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 1392 else if (log) 1393 log->Printf ("Process::%s got no event or was interrupted.", __FUNCTION__); 1394 } 1395 1396 if (log) 1397 log->Printf ("Process::%s (timeout = %p, event_sp) => %s", 1398 __FUNCTION__, 1399 timeout, 1400 StateAsCString(state)); 1401 return state; 1402} 1403 1404Event * 1405Process::PeekAtStateChangedEvents () 1406{ 1407 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1408 1409 if (log) 1410 log->Printf ("Process::%s...", __FUNCTION__); 1411 1412 Event *event_ptr; 1413 event_ptr = m_listener.PeekAtNextEventForBroadcasterWithType (this, 1414 eBroadcastBitStateChanged); 1415 if (log) 1416 { 1417 if (event_ptr) 1418 { 1419 log->Printf ("Process::%s (event_ptr) => %s", 1420 __FUNCTION__, 1421 StateAsCString(ProcessEventData::GetStateFromEvent (event_ptr))); 1422 } 1423 else 1424 { 1425 log->Printf ("Process::%s no events found", 1426 __FUNCTION__); 1427 } 1428 } 1429 return event_ptr; 1430} 1431 1432StateType 1433Process::WaitForStateChangedEventsPrivate (const TimeValue *timeout, EventSP &event_sp) 1434{ 1435 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1436 1437 if (log) 1438 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, timeout); 1439 1440 StateType state = eStateInvalid; 1441 if (m_private_state_listener.WaitForEventForBroadcasterWithType (timeout, 1442 &m_private_state_broadcaster, 1443 eBroadcastBitStateChanged | eBroadcastBitInterrupt, 1444 event_sp)) 1445 if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged) 1446 state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 1447 1448 // This is a bit of a hack, but when we wait here we could very well return 1449 // to the command-line, and that could disable the log, which would render the 1450 // log we got above invalid. 1451 if (log) 1452 { 1453 if (state == eStateInvalid) 1454 log->Printf ("Process::%s (timeout = %p, event_sp) => TIMEOUT", __FUNCTION__, timeout); 1455 else 1456 log->Printf ("Process::%s (timeout = %p, event_sp) => %s", __FUNCTION__, timeout, StateAsCString(state)); 1457 } 1458 return state; 1459} 1460 1461bool 1462Process::WaitForEventsPrivate (const TimeValue *timeout, EventSP &event_sp, bool control_only) 1463{ 1464 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 1465 1466 if (log) 1467 log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, timeout); 1468 1469 if (control_only) 1470 return m_private_state_listener.WaitForEventForBroadcaster(timeout, &m_private_state_control_broadcaster, event_sp); 1471 else 1472 return m_private_state_listener.WaitForEvent(timeout, event_sp); 1473} 1474 1475bool 1476Process::IsRunning () const 1477{ 1478 return StateIsRunningState (m_public_state.GetValue()); 1479} 1480 1481int 1482Process::GetExitStatus () 1483{ 1484 if (m_public_state.GetValue() == eStateExited) 1485 return m_exit_status; 1486 return -1; 1487} 1488 1489 1490const char * 1491Process::GetExitDescription () 1492{ 1493 if (m_public_state.GetValue() == eStateExited && !m_exit_string.empty()) 1494 return m_exit_string.c_str(); 1495 return NULL; 1496} 1497 1498bool 1499Process::SetExitStatus (int status, const char *cstr) 1500{ 1501 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1502 if (log) 1503 log->Printf("Process::SetExitStatus (status=%i (0x%8.8x), description=%s%s%s)", 1504 status, status, 1505 cstr ? "\"" : "", 1506 cstr ? cstr : "NULL", 1507 cstr ? "\"" : ""); 1508 1509 // We were already in the exited state 1510 if (m_private_state.GetValue() == eStateExited) 1511 { 1512 if (log) 1513 log->Printf("Process::SetExitStatus () ignoring exit status because state was already set to eStateExited"); 1514 return false; 1515 } 1516 1517 m_exit_status = status; 1518 if (cstr) 1519 m_exit_string = cstr; 1520 else 1521 m_exit_string.clear(); 1522 1523 DidExit (); 1524 1525 SetPrivateState (eStateExited); 1526 CancelWatchForSTDIN (true); 1527 return true; 1528} 1529 1530// This static callback can be used to watch for local child processes on 1531// the current host. The the child process exits, the process will be 1532// found in the global target list (we want to be completely sure that the 1533// lldb_private::Process doesn't go away before we can deliver the signal. 1534bool 1535Process::SetProcessExitStatus (void *callback_baton, 1536 lldb::pid_t pid, 1537 bool exited, 1538 int signo, // Zero for no signal 1539 int exit_status // Exit value of process if signal is zero 1540) 1541{ 1542 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 1543 if (log) 1544 log->Printf ("Process::SetProcessExitStatus (baton=%p, pid=%" PRIu64 ", exited=%i, signal=%i, exit_status=%i)\n", 1545 callback_baton, 1546 pid, 1547 exited, 1548 signo, 1549 exit_status); 1550 1551 if (exited) 1552 { 1553 TargetSP target_sp(Debugger::FindTargetWithProcessID (pid)); 1554 if (target_sp) 1555 { 1556 ProcessSP process_sp (target_sp->GetProcessSP()); 1557 if (process_sp) 1558 { 1559 const char *signal_cstr = NULL; 1560 if (signo) 1561 signal_cstr = process_sp->GetUnixSignals().GetSignalAsCString (signo); 1562 1563 process_sp->SetExitStatus (exit_status, signal_cstr); 1564 } 1565 } 1566 return true; 1567 } 1568 return false; 1569} 1570 1571 1572void 1573Process::UpdateThreadListIfNeeded () 1574{ 1575 const uint32_t stop_id = GetStopID(); 1576 if (m_thread_list.GetSize(false) == 0 || stop_id != m_thread_list.GetStopID()) 1577 { 1578 const StateType state = GetPrivateState(); 1579 if (StateIsStoppedState (state, true)) 1580 { 1581 Mutex::Locker locker (m_thread_list.GetMutex ()); 1582 // m_thread_list does have its own mutex, but we need to 1583 // hold onto the mutex between the call to UpdateThreadList(...) 1584 // and the os->UpdateThreadList(...) so it doesn't change on us 1585 ThreadList &old_thread_list = m_thread_list; 1586 ThreadList real_thread_list(this); 1587 ThreadList new_thread_list(this); 1588 // Always update the thread list with the protocol specific 1589 // thread list, but only update if "true" is returned 1590 if (UpdateThreadList (m_thread_list_real, real_thread_list)) 1591 { 1592 // Don't call into the OperatingSystem to update the thread list if we are shutting down, since 1593 // that may call back into the SBAPI's, requiring the API lock which is already held by whoever is 1594 // shutting us down, causing a deadlock. 1595 if (!m_destroy_in_process) 1596 { 1597 OperatingSystem *os = GetOperatingSystem (); 1598 if (os) 1599 { 1600 // Clear any old backing threads where memory threads might have been 1601 // backed by actual threads from the lldb_private::Process subclass 1602 size_t num_old_threads = old_thread_list.GetSize(false); 1603 for (size_t i=0; i<num_old_threads; ++i) 1604 old_thread_list.GetThreadAtIndex(i, false)->ClearBackingThread(); 1605 1606 // Now let the OperatingSystem plug-in update the thread list 1607 os->UpdateThreadList (old_thread_list, // Old list full of threads created by OS plug-in 1608 real_thread_list, // The actual thread list full of threads created by each lldb_private::Process subclass 1609 new_thread_list); // The new thread list that we will show to the user that gets filled in 1610 } 1611 else 1612 { 1613 // No OS plug-in, the new thread list is the same as the real thread list 1614 new_thread_list = real_thread_list; 1615 } 1616 } 1617 1618 m_thread_list_real.Update(real_thread_list); 1619 m_thread_list.Update (new_thread_list); 1620 m_thread_list.SetStopID (stop_id); 1621 1622 if (GetLastNaturalStopID () != m_extended_thread_stop_id) 1623 { 1624 // Clear any extended threads that we may have accumulated previously 1625 m_extended_thread_list.Clear(); 1626 m_extended_thread_stop_id = GetLastNaturalStopID (); 1627 1628 m_queue_list.Clear(); 1629 m_queue_list_stop_id = GetLastNaturalStopID (); 1630 } 1631 } 1632 } 1633 } 1634} 1635 1636void 1637Process::UpdateQueueListIfNeeded () 1638{ 1639 if (m_system_runtime_ap.get()) 1640 { 1641 if (m_queue_list.GetSize() == 0 || m_queue_list_stop_id != GetLastNaturalStopID()) 1642 { 1643 const StateType state = GetPrivateState(); 1644 if (StateIsStoppedState (state, true)) 1645 { 1646 m_system_runtime_ap->PopulateQueueList (m_queue_list); 1647 m_queue_list_stop_id = GetLastNaturalStopID(); 1648 } 1649 } 1650 } 1651} 1652 1653ThreadSP 1654Process::CreateOSPluginThread (lldb::tid_t tid, lldb::addr_t context) 1655{ 1656 OperatingSystem *os = GetOperatingSystem (); 1657 if (os) 1658 return os->CreateThread(tid, context); 1659 return ThreadSP(); 1660} 1661 1662uint32_t 1663Process::GetNextThreadIndexID (uint64_t thread_id) 1664{ 1665 return AssignIndexIDToThread(thread_id); 1666} 1667 1668bool 1669Process::HasAssignedIndexIDToThread(uint64_t thread_id) 1670{ 1671 std::map<uint64_t, uint32_t>::iterator iterator = m_thread_id_to_index_id_map.find(thread_id); 1672 if (iterator == m_thread_id_to_index_id_map.end()) 1673 { 1674 return false; 1675 } 1676 else 1677 { 1678 return true; 1679 } 1680} 1681 1682uint32_t 1683Process::AssignIndexIDToThread(uint64_t thread_id) 1684{ 1685 uint32_t result = 0; 1686 std::map<uint64_t, uint32_t>::iterator iterator = m_thread_id_to_index_id_map.find(thread_id); 1687 if (iterator == m_thread_id_to_index_id_map.end()) 1688 { 1689 result = ++m_thread_index_id; 1690 m_thread_id_to_index_id_map[thread_id] = result; 1691 } 1692 else 1693 { 1694 result = iterator->second; 1695 } 1696 1697 return result; 1698} 1699 1700StateType 1701Process::GetState() 1702{ 1703 // If any other threads access this we will need a mutex for it 1704 return m_public_state.GetValue (); 1705} 1706 1707void 1708Process::SetPublicState (StateType new_state, bool restarted) 1709{ 1710 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1711 if (log) 1712 log->Printf("Process::SetPublicState (state = %s, restarted = %i)", StateAsCString(new_state), restarted); 1713 const StateType old_state = m_public_state.GetValue(); 1714 m_public_state.SetValue (new_state); 1715 1716 // On the transition from Run to Stopped, we unlock the writer end of the 1717 // run lock. The lock gets locked in Resume, which is the public API 1718 // to tell the program to run. 1719 if (!IsHijackedForEvent(eBroadcastBitStateChanged)) 1720 { 1721 if (new_state == eStateDetached) 1722 { 1723 if (log) 1724 log->Printf("Process::SetPublicState (%s) -- unlocking run lock for detach", StateAsCString(new_state)); 1725 m_public_run_lock.SetStopped(); 1726 } 1727 else 1728 { 1729 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1730 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1731 if ((old_state_is_stopped != new_state_is_stopped)) 1732 { 1733 if (new_state_is_stopped && !restarted) 1734 { 1735 if (log) 1736 log->Printf("Process::SetPublicState (%s) -- unlocking run lock", StateAsCString(new_state)); 1737 m_public_run_lock.SetStopped(); 1738 } 1739 } 1740 } 1741 } 1742} 1743 1744Error 1745Process::Resume () 1746{ 1747 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1748 if (log) 1749 log->Printf("Process::Resume -- locking run lock"); 1750 if (!m_public_run_lock.TrySetRunning()) 1751 { 1752 Error error("Resume request failed - process still running."); 1753 if (log) 1754 log->Printf ("Process::Resume: -- TrySetRunning failed, not resuming."); 1755 return error; 1756 } 1757 return PrivateResume(); 1758} 1759 1760StateType 1761Process::GetPrivateState () 1762{ 1763 return m_private_state.GetValue(); 1764} 1765 1766void 1767Process::SetPrivateState (StateType new_state) 1768{ 1769 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE | LIBLLDB_LOG_PROCESS)); 1770 bool state_changed = false; 1771 1772 if (log) 1773 log->Printf("Process::SetPrivateState (%s)", StateAsCString(new_state)); 1774 1775 Mutex::Locker thread_locker(m_thread_list.GetMutex()); 1776 Mutex::Locker locker(m_private_state.GetMutex()); 1777 1778 const StateType old_state = m_private_state.GetValueNoLock (); 1779 state_changed = old_state != new_state; 1780 1781 const bool old_state_is_stopped = StateIsStoppedState(old_state, false); 1782 const bool new_state_is_stopped = StateIsStoppedState(new_state, false); 1783 if (old_state_is_stopped != new_state_is_stopped) 1784 { 1785 if (new_state_is_stopped) 1786 m_private_run_lock.SetStopped(); 1787 else 1788 m_private_run_lock.SetRunning(); 1789 } 1790 1791 if (state_changed) 1792 { 1793 m_private_state.SetValueNoLock (new_state); 1794 if (StateIsStoppedState(new_state, false)) 1795 { 1796 // Note, this currently assumes that all threads in the list 1797 // stop when the process stops. In the future we will want to 1798 // support a debugging model where some threads continue to run 1799 // while others are stopped. When that happens we will either need 1800 // a way for the thread list to identify which threads are stopping 1801 // or create a special thread list containing only threads which 1802 // actually stopped. 1803 // 1804 // The process plugin is responsible for managing the actual 1805 // behavior of the threads and should have stopped any threads 1806 // that are going to stop before we get here. 1807 m_thread_list.DidStop(); 1808 1809 m_mod_id.BumpStopID(); 1810 m_memory_cache.Clear(); 1811 if (log) 1812 log->Printf("Process::SetPrivateState (%s) stop_id = %u", StateAsCString(new_state), m_mod_id.GetStopID()); 1813 } 1814 // Use our target to get a shared pointer to ourselves... 1815 if (m_finalize_called && PrivateStateThreadIsValid() == false) 1816 BroadcastEvent (eBroadcastBitStateChanged, new ProcessEventData (shared_from_this(), new_state)); 1817 else 1818 m_private_state_broadcaster.BroadcastEvent (eBroadcastBitStateChanged, new ProcessEventData (shared_from_this(), new_state)); 1819 } 1820 else 1821 { 1822 if (log) 1823 log->Printf("Process::SetPrivateState (%s) state didn't change. Ignoring...", StateAsCString(new_state)); 1824 } 1825} 1826 1827void 1828Process::SetRunningUserExpression (bool on) 1829{ 1830 m_mod_id.SetRunningUserExpression (on); 1831} 1832 1833addr_t 1834Process::GetImageInfoAddress() 1835{ 1836 return LLDB_INVALID_ADDRESS; 1837} 1838 1839//---------------------------------------------------------------------- 1840// LoadImage 1841// 1842// This function provides a default implementation that works for most 1843// unix variants. Any Process subclasses that need to do shared library 1844// loading differently should override LoadImage and UnloadImage and 1845// do what is needed. 1846//---------------------------------------------------------------------- 1847uint32_t 1848Process::LoadImage (const FileSpec &image_spec, Error &error) 1849{ 1850 char path[PATH_MAX]; 1851 image_spec.GetPath(path, sizeof(path)); 1852 1853 DynamicLoader *loader = GetDynamicLoader(); 1854 if (loader) 1855 { 1856 error = loader->CanLoadImage(); 1857 if (error.Fail()) 1858 return LLDB_INVALID_IMAGE_TOKEN; 1859 } 1860 1861 if (error.Success()) 1862 { 1863 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 1864 1865 if (thread_sp) 1866 { 1867 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 1868 1869 if (frame_sp) 1870 { 1871 ExecutionContext exe_ctx; 1872 frame_sp->CalculateExecutionContext (exe_ctx); 1873 EvaluateExpressionOptions expr_options; 1874 expr_options.SetUnwindOnError(true); 1875 expr_options.SetIgnoreBreakpoints(true); 1876 expr_options.SetExecutionPolicy(eExecutionPolicyAlways); 1877 StreamString expr; 1878 expr.Printf("dlopen (\"%s\", 2)", path); 1879 const char *prefix = "extern \"C\" void* dlopen (const char *path, int mode);\n"; 1880 lldb::ValueObjectSP result_valobj_sp; 1881 Error expr_error; 1882 ClangUserExpression::Evaluate (exe_ctx, 1883 expr_options, 1884 expr.GetData(), 1885 prefix, 1886 result_valobj_sp, 1887 expr_error); 1888 if (expr_error.Success()) 1889 { 1890 error = result_valobj_sp->GetError(); 1891 if (error.Success()) 1892 { 1893 Scalar scalar; 1894 if (result_valobj_sp->ResolveValue (scalar)) 1895 { 1896 addr_t image_ptr = scalar.ULongLong(LLDB_INVALID_ADDRESS); 1897 if (image_ptr != 0 && image_ptr != LLDB_INVALID_ADDRESS) 1898 { 1899 uint32_t image_token = m_image_tokens.size(); 1900 m_image_tokens.push_back (image_ptr); 1901 return image_token; 1902 } 1903 } 1904 } 1905 } 1906 } 1907 } 1908 } 1909 if (!error.AsCString()) 1910 error.SetErrorStringWithFormat("unable to load '%s'", path); 1911 return LLDB_INVALID_IMAGE_TOKEN; 1912} 1913 1914//---------------------------------------------------------------------- 1915// UnloadImage 1916// 1917// This function provides a default implementation that works for most 1918// unix variants. Any Process subclasses that need to do shared library 1919// loading differently should override LoadImage and UnloadImage and 1920// do what is needed. 1921//---------------------------------------------------------------------- 1922Error 1923Process::UnloadImage (uint32_t image_token) 1924{ 1925 Error error; 1926 if (image_token < m_image_tokens.size()) 1927 { 1928 const addr_t image_addr = m_image_tokens[image_token]; 1929 if (image_addr == LLDB_INVALID_ADDRESS) 1930 { 1931 error.SetErrorString("image already unloaded"); 1932 } 1933 else 1934 { 1935 DynamicLoader *loader = GetDynamicLoader(); 1936 if (loader) 1937 error = loader->CanLoadImage(); 1938 1939 if (error.Success()) 1940 { 1941 ThreadSP thread_sp(GetThreadList ().GetSelectedThread()); 1942 1943 if (thread_sp) 1944 { 1945 StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex (0)); 1946 1947 if (frame_sp) 1948 { 1949 ExecutionContext exe_ctx; 1950 frame_sp->CalculateExecutionContext (exe_ctx); 1951 EvaluateExpressionOptions expr_options; 1952 expr_options.SetUnwindOnError(true); 1953 expr_options.SetIgnoreBreakpoints(true); 1954 expr_options.SetExecutionPolicy(eExecutionPolicyAlways); 1955 StreamString expr; 1956 expr.Printf("dlclose ((void *)0x%" PRIx64 ")", image_addr); 1957 const char *prefix = "extern \"C\" int dlclose(void* handle);\n"; 1958 lldb::ValueObjectSP result_valobj_sp; 1959 Error expr_error; 1960 ClangUserExpression::Evaluate (exe_ctx, 1961 expr_options, 1962 expr.GetData(), 1963 prefix, 1964 result_valobj_sp, 1965 expr_error); 1966 if (result_valobj_sp->GetError().Success()) 1967 { 1968 Scalar scalar; 1969 if (result_valobj_sp->ResolveValue (scalar)) 1970 { 1971 if (scalar.UInt(1)) 1972 { 1973 error.SetErrorStringWithFormat("expression failed: \"%s\"", expr.GetData()); 1974 } 1975 else 1976 { 1977 m_image_tokens[image_token] = LLDB_INVALID_ADDRESS; 1978 } 1979 } 1980 } 1981 else 1982 { 1983 error = result_valobj_sp->GetError(); 1984 } 1985 } 1986 } 1987 } 1988 } 1989 } 1990 else 1991 { 1992 error.SetErrorString("invalid image token"); 1993 } 1994 return error; 1995} 1996 1997const lldb::ABISP & 1998Process::GetABI() 1999{ 2000 if (!m_abi_sp) 2001 m_abi_sp = ABI::FindPlugin(m_target.GetArchitecture()); 2002 return m_abi_sp; 2003} 2004 2005LanguageRuntime * 2006Process::GetLanguageRuntime(lldb::LanguageType language, bool retry_if_null) 2007{ 2008 LanguageRuntimeCollection::iterator pos; 2009 pos = m_language_runtimes.find (language); 2010 if (pos == m_language_runtimes.end() || (retry_if_null && !(*pos).second)) 2011 { 2012 lldb::LanguageRuntimeSP runtime_sp(LanguageRuntime::FindPlugin(this, language)); 2013 2014 m_language_runtimes[language] = runtime_sp; 2015 return runtime_sp.get(); 2016 } 2017 else 2018 return (*pos).second.get(); 2019} 2020 2021CPPLanguageRuntime * 2022Process::GetCPPLanguageRuntime (bool retry_if_null) 2023{ 2024 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeC_plus_plus, retry_if_null); 2025 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeC_plus_plus) 2026 return static_cast<CPPLanguageRuntime *> (runtime); 2027 return NULL; 2028} 2029 2030ObjCLanguageRuntime * 2031Process::GetObjCLanguageRuntime (bool retry_if_null) 2032{ 2033 LanguageRuntime *runtime = GetLanguageRuntime(eLanguageTypeObjC, retry_if_null); 2034 if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeObjC) 2035 return static_cast<ObjCLanguageRuntime *> (runtime); 2036 return NULL; 2037} 2038 2039bool 2040Process::IsPossibleDynamicValue (ValueObject& in_value) 2041{ 2042 if (in_value.IsDynamic()) 2043 return false; 2044 LanguageType known_type = in_value.GetObjectRuntimeLanguage(); 2045 2046 if (known_type != eLanguageTypeUnknown && known_type != eLanguageTypeC) 2047 { 2048 LanguageRuntime *runtime = GetLanguageRuntime (known_type); 2049 return runtime ? runtime->CouldHaveDynamicValue(in_value) : false; 2050 } 2051 2052 LanguageRuntime *cpp_runtime = GetLanguageRuntime (eLanguageTypeC_plus_plus); 2053 if (cpp_runtime && cpp_runtime->CouldHaveDynamicValue(in_value)) 2054 return true; 2055 2056 LanguageRuntime *objc_runtime = GetLanguageRuntime (eLanguageTypeObjC); 2057 return objc_runtime ? objc_runtime->CouldHaveDynamicValue(in_value) : false; 2058} 2059 2060BreakpointSiteList & 2061Process::GetBreakpointSiteList() 2062{ 2063 return m_breakpoint_site_list; 2064} 2065 2066const BreakpointSiteList & 2067Process::GetBreakpointSiteList() const 2068{ 2069 return m_breakpoint_site_list; 2070} 2071 2072 2073void 2074Process::DisableAllBreakpointSites () 2075{ 2076 m_breakpoint_site_list.ForEach([this](BreakpointSite *bp_site) -> void { 2077// bp_site->SetEnabled(true); 2078 DisableBreakpointSite(bp_site); 2079 }); 2080} 2081 2082Error 2083Process::ClearBreakpointSiteByID (lldb::user_id_t break_id) 2084{ 2085 Error error (DisableBreakpointSiteByID (break_id)); 2086 2087 if (error.Success()) 2088 m_breakpoint_site_list.Remove(break_id); 2089 2090 return error; 2091} 2092 2093Error 2094Process::DisableBreakpointSiteByID (lldb::user_id_t break_id) 2095{ 2096 Error error; 2097 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2098 if (bp_site_sp) 2099 { 2100 if (bp_site_sp->IsEnabled()) 2101 error = DisableBreakpointSite (bp_site_sp.get()); 2102 } 2103 else 2104 { 2105 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2106 } 2107 2108 return error; 2109} 2110 2111Error 2112Process::EnableBreakpointSiteByID (lldb::user_id_t break_id) 2113{ 2114 Error error; 2115 BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id); 2116 if (bp_site_sp) 2117 { 2118 if (!bp_site_sp->IsEnabled()) 2119 error = EnableBreakpointSite (bp_site_sp.get()); 2120 } 2121 else 2122 { 2123 error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64, break_id); 2124 } 2125 return error; 2126} 2127 2128lldb::break_id_t 2129Process::CreateBreakpointSite (const BreakpointLocationSP &owner, bool use_hardware) 2130{ 2131 addr_t load_addr = LLDB_INVALID_ADDRESS; 2132 2133 bool show_error = true; 2134 switch (GetState()) 2135 { 2136 case eStateInvalid: 2137 case eStateUnloaded: 2138 case eStateConnected: 2139 case eStateAttaching: 2140 case eStateLaunching: 2141 case eStateDetached: 2142 case eStateExited: 2143 show_error = false; 2144 break; 2145 2146 case eStateStopped: 2147 case eStateRunning: 2148 case eStateStepping: 2149 case eStateCrashed: 2150 case eStateSuspended: 2151 show_error = IsAlive(); 2152 break; 2153 } 2154 2155 // Reset the IsIndirect flag here, in case the location changes from 2156 // pointing to a indirect symbol to a regular symbol. 2157 owner->SetIsIndirect (false); 2158 2159 if (owner->ShouldResolveIndirectFunctions()) 2160 { 2161 Symbol *symbol = owner->GetAddress().CalculateSymbolContextSymbol(); 2162 if (symbol && symbol->IsIndirect()) 2163 { 2164 Error error; 2165 load_addr = ResolveIndirectFunction (&symbol->GetAddress(), error); 2166 if (!error.Success() && show_error) 2167 { 2168 m_target.GetDebugger().GetErrorFile()->Printf ("warning: failed to resolve indirect function at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2169 symbol->GetAddress().GetLoadAddress(&m_target), 2170 owner->GetBreakpoint().GetID(), 2171 owner->GetID(), 2172 error.AsCString() ? error.AsCString() : "unkown error"); 2173 return LLDB_INVALID_BREAK_ID; 2174 } 2175 Address resolved_address(load_addr); 2176 load_addr = resolved_address.GetOpcodeLoadAddress (&m_target); 2177 owner->SetIsIndirect(true); 2178 } 2179 else 2180 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&m_target); 2181 } 2182 else 2183 load_addr = owner->GetAddress().GetOpcodeLoadAddress (&m_target); 2184 2185 if (load_addr != LLDB_INVALID_ADDRESS) 2186 { 2187 BreakpointSiteSP bp_site_sp; 2188 2189 // Look up this breakpoint site. If it exists, then add this new owner, otherwise 2190 // create a new breakpoint site and add it. 2191 2192 bp_site_sp = m_breakpoint_site_list.FindByAddress (load_addr); 2193 2194 if (bp_site_sp) 2195 { 2196 bp_site_sp->AddOwner (owner); 2197 owner->SetBreakpointSite (bp_site_sp); 2198 return bp_site_sp->GetID(); 2199 } 2200 else 2201 { 2202 bp_site_sp.reset (new BreakpointSite (&m_breakpoint_site_list, owner, load_addr, use_hardware)); 2203 if (bp_site_sp) 2204 { 2205 Error error = EnableBreakpointSite (bp_site_sp.get()); 2206 if (error.Success()) 2207 { 2208 owner->SetBreakpointSite (bp_site_sp); 2209 return m_breakpoint_site_list.Add (bp_site_sp); 2210 } 2211 else 2212 { 2213 if (show_error) 2214 { 2215 // Report error for setting breakpoint... 2216 m_target.GetDebugger().GetErrorFile()->Printf ("warning: failed to set breakpoint site at 0x%" PRIx64 " for breakpoint %i.%i: %s\n", 2217 load_addr, 2218 owner->GetBreakpoint().GetID(), 2219 owner->GetID(), 2220 error.AsCString() ? error.AsCString() : "unkown error"); 2221 } 2222 } 2223 } 2224 } 2225 } 2226 // We failed to enable the breakpoint 2227 return LLDB_INVALID_BREAK_ID; 2228 2229} 2230 2231void 2232Process::RemoveOwnerFromBreakpointSite (lldb::user_id_t owner_id, lldb::user_id_t owner_loc_id, BreakpointSiteSP &bp_site_sp) 2233{ 2234 uint32_t num_owners = bp_site_sp->RemoveOwner (owner_id, owner_loc_id); 2235 if (num_owners == 0) 2236 { 2237 // Don't try to disable the site if we don't have a live process anymore. 2238 if (IsAlive()) 2239 DisableBreakpointSite (bp_site_sp.get()); 2240 m_breakpoint_site_list.RemoveByAddress(bp_site_sp->GetLoadAddress()); 2241 } 2242} 2243 2244 2245size_t 2246Process::RemoveBreakpointOpcodesFromBuffer (addr_t bp_addr, size_t size, uint8_t *buf) const 2247{ 2248 size_t bytes_removed = 0; 2249 BreakpointSiteList bp_sites_in_range; 2250 2251 if (m_breakpoint_site_list.FindInRange (bp_addr, bp_addr + size, bp_sites_in_range)) 2252 { 2253 bp_sites_in_range.ForEach([bp_addr, size, buf, &bytes_removed](BreakpointSite *bp_site) -> void { 2254 if (bp_site->GetType() == BreakpointSite::eSoftware) 2255 { 2256 addr_t intersect_addr; 2257 size_t intersect_size; 2258 size_t opcode_offset; 2259 if (bp_site->IntersectsRange(bp_addr, size, &intersect_addr, &intersect_size, &opcode_offset)) 2260 { 2261 assert(bp_addr <= intersect_addr && intersect_addr < bp_addr + size); 2262 assert(bp_addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= bp_addr + size); 2263 assert(opcode_offset + intersect_size <= bp_site->GetByteSize()); 2264 size_t buf_offset = intersect_addr - bp_addr; 2265 ::memcpy(buf + buf_offset, bp_site->GetSavedOpcodeBytes() + opcode_offset, intersect_size); 2266 } 2267 } 2268 }); 2269 } 2270 return bytes_removed; 2271} 2272 2273 2274 2275size_t 2276Process::GetSoftwareBreakpointTrapOpcode (BreakpointSite* bp_site) 2277{ 2278 PlatformSP platform_sp (m_target.GetPlatform()); 2279 if (platform_sp) 2280 return platform_sp->GetSoftwareBreakpointTrapOpcode (m_target, bp_site); 2281 return 0; 2282} 2283 2284Error 2285Process::EnableSoftwareBreakpoint (BreakpointSite *bp_site) 2286{ 2287 Error error; 2288 assert (bp_site != NULL); 2289 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2290 const addr_t bp_addr = bp_site->GetLoadAddress(); 2291 if (log) 2292 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64, bp_site->GetID(), (uint64_t)bp_addr); 2293 if (bp_site->IsEnabled()) 2294 { 2295 if (log) 2296 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already enabled", bp_site->GetID(), (uint64_t)bp_addr); 2297 return error; 2298 } 2299 2300 if (bp_addr == LLDB_INVALID_ADDRESS) 2301 { 2302 error.SetErrorString("BreakpointSite contains an invalid load address."); 2303 return error; 2304 } 2305 // Ask the lldb::Process subclass to fill in the correct software breakpoint 2306 // trap for the breakpoint site 2307 const size_t bp_opcode_size = GetSoftwareBreakpointTrapOpcode(bp_site); 2308 2309 if (bp_opcode_size == 0) 2310 { 2311 error.SetErrorStringWithFormat ("Process::GetSoftwareBreakpointTrapOpcode() returned zero, unable to get breakpoint trap for address 0x%" PRIx64, bp_addr); 2312 } 2313 else 2314 { 2315 const uint8_t * const bp_opcode_bytes = bp_site->GetTrapOpcodeBytes(); 2316 2317 if (bp_opcode_bytes == NULL) 2318 { 2319 error.SetErrorString ("BreakpointSite doesn't contain a valid breakpoint trap opcode."); 2320 return error; 2321 } 2322 2323 // Save the original opcode by reading it 2324 if (DoReadMemory(bp_addr, bp_site->GetSavedOpcodeBytes(), bp_opcode_size, error) == bp_opcode_size) 2325 { 2326 // Write a software breakpoint in place of the original opcode 2327 if (DoWriteMemory(bp_addr, bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2328 { 2329 uint8_t verify_bp_opcode_bytes[64]; 2330 if (DoReadMemory(bp_addr, verify_bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size) 2331 { 2332 if (::memcmp(bp_opcode_bytes, verify_bp_opcode_bytes, bp_opcode_size) == 0) 2333 { 2334 bp_site->SetEnabled(true); 2335 bp_site->SetType (BreakpointSite::eSoftware); 2336 if (log) 2337 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", 2338 bp_site->GetID(), 2339 (uint64_t)bp_addr); 2340 } 2341 else 2342 error.SetErrorString("failed to verify the breakpoint trap in memory."); 2343 } 2344 else 2345 error.SetErrorString("Unable to read memory to verify breakpoint trap."); 2346 } 2347 else 2348 error.SetErrorString("Unable to write breakpoint trap to memory."); 2349 } 2350 else 2351 error.SetErrorString("Unable to read memory at breakpoint address."); 2352 } 2353 if (log && error.Fail()) 2354 log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2355 bp_site->GetID(), 2356 (uint64_t)bp_addr, 2357 error.AsCString()); 2358 return error; 2359} 2360 2361Error 2362Process::DisableSoftwareBreakpoint (BreakpointSite *bp_site) 2363{ 2364 Error error; 2365 assert (bp_site != NULL); 2366 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); 2367 addr_t bp_addr = bp_site->GetLoadAddress(); 2368 lldb::user_id_t breakID = bp_site->GetID(); 2369 if (log) 2370 log->Printf ("Process::DisableSoftwareBreakpoint (breakID = %" PRIu64 ") addr = 0x%" PRIx64, breakID, (uint64_t)bp_addr); 2371 2372 if (bp_site->IsHardware()) 2373 { 2374 error.SetErrorString("Breakpoint site is a hardware breakpoint."); 2375 } 2376 else if (bp_site->IsEnabled()) 2377 { 2378 const size_t break_op_size = bp_site->GetByteSize(); 2379 const uint8_t * const break_op = bp_site->GetTrapOpcodeBytes(); 2380 if (break_op_size > 0) 2381 { 2382 // Clear a software breakoint instruction 2383 uint8_t curr_break_op[8]; 2384 assert (break_op_size <= sizeof(curr_break_op)); 2385 bool break_op_found = false; 2386 2387 // Read the breakpoint opcode 2388 if (DoReadMemory (bp_addr, curr_break_op, break_op_size, error) == break_op_size) 2389 { 2390 bool verify = false; 2391 // Make sure we have the a breakpoint opcode exists at this address 2392 if (::memcmp (curr_break_op, break_op, break_op_size) == 0) 2393 { 2394 break_op_found = true; 2395 // We found a valid breakpoint opcode at this address, now restore 2396 // the saved opcode. 2397 if (DoWriteMemory (bp_addr, bp_site->GetSavedOpcodeBytes(), break_op_size, error) == break_op_size) 2398 { 2399 verify = true; 2400 } 2401 else 2402 error.SetErrorString("Memory write failed when restoring original opcode."); 2403 } 2404 else 2405 { 2406 error.SetErrorString("Original breakpoint trap is no longer in memory."); 2407 // Set verify to true and so we can check if the original opcode has already been restored 2408 verify = true; 2409 } 2410 2411 if (verify) 2412 { 2413 uint8_t verify_opcode[8]; 2414 assert (break_op_size < sizeof(verify_opcode)); 2415 // Verify that our original opcode made it back to the inferior 2416 if (DoReadMemory (bp_addr, verify_opcode, break_op_size, error) == break_op_size) 2417 { 2418 // compare the memory we just read with the original opcode 2419 if (::memcmp (bp_site->GetSavedOpcodeBytes(), verify_opcode, break_op_size) == 0) 2420 { 2421 // SUCCESS 2422 bp_site->SetEnabled(false); 2423 if (log) 2424 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- SUCCESS", bp_site->GetID(), (uint64_t)bp_addr); 2425 return error; 2426 } 2427 else 2428 { 2429 if (break_op_found) 2430 error.SetErrorString("Failed to restore original opcode."); 2431 } 2432 } 2433 else 2434 error.SetErrorString("Failed to read memory to verify that breakpoint trap was restored."); 2435 } 2436 } 2437 else 2438 error.SetErrorString("Unable to read memory that should contain the breakpoint trap."); 2439 } 2440 } 2441 else 2442 { 2443 if (log) 2444 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- already disabled", bp_site->GetID(), (uint64_t)bp_addr); 2445 return error; 2446 } 2447 2448 if (log) 2449 log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64 " -- FAILED: %s", 2450 bp_site->GetID(), 2451 (uint64_t)bp_addr, 2452 error.AsCString()); 2453 return error; 2454 2455} 2456 2457// Uncomment to verify memory caching works after making changes to caching code 2458//#define VERIFY_MEMORY_READS 2459 2460size_t 2461Process::ReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2462{ 2463 error.Clear(); 2464 if (!GetDisableMemoryCache()) 2465 { 2466#if defined (VERIFY_MEMORY_READS) 2467 // Memory caching is enabled, with debug verification 2468 2469 if (buf && size) 2470 { 2471 // Uncomment the line below to make sure memory caching is working. 2472 // I ran this through the test suite and got no assertions, so I am 2473 // pretty confident this is working well. If any changes are made to 2474 // memory caching, uncomment the line below and test your changes! 2475 2476 // Verify all memory reads by using the cache first, then redundantly 2477 // reading the same memory from the inferior and comparing to make sure 2478 // everything is exactly the same. 2479 std::string verify_buf (size, '\0'); 2480 assert (verify_buf.size() == size); 2481 const size_t cache_bytes_read = m_memory_cache.Read (this, addr, buf, size, error); 2482 Error verify_error; 2483 const size_t verify_bytes_read = ReadMemoryFromInferior (addr, const_cast<char *>(verify_buf.data()), verify_buf.size(), verify_error); 2484 assert (cache_bytes_read == verify_bytes_read); 2485 assert (memcmp(buf, verify_buf.data(), verify_buf.size()) == 0); 2486 assert (verify_error.Success() == error.Success()); 2487 return cache_bytes_read; 2488 } 2489 return 0; 2490#else // !defined(VERIFY_MEMORY_READS) 2491 // Memory caching is enabled, without debug verification 2492 2493 return m_memory_cache.Read (addr, buf, size, error); 2494#endif // defined (VERIFY_MEMORY_READS) 2495 } 2496 else 2497 { 2498 // Memory caching is disabled 2499 2500 return ReadMemoryFromInferior (addr, buf, size, error); 2501 } 2502} 2503 2504size_t 2505Process::ReadCStringFromMemory (addr_t addr, std::string &out_str, Error &error) 2506{ 2507 char buf[256]; 2508 out_str.clear(); 2509 addr_t curr_addr = addr; 2510 while (1) 2511 { 2512 size_t length = ReadCStringFromMemory (curr_addr, buf, sizeof(buf), error); 2513 if (length == 0) 2514 break; 2515 out_str.append(buf, length); 2516 // If we got "length - 1" bytes, we didn't get the whole C string, we 2517 // need to read some more characters 2518 if (length == sizeof(buf) - 1) 2519 curr_addr += length; 2520 else 2521 break; 2522 } 2523 return out_str.size(); 2524} 2525 2526 2527size_t 2528Process::ReadStringFromMemory (addr_t addr, char *dst, size_t max_bytes, Error &error, 2529 size_t type_width) 2530{ 2531 size_t total_bytes_read = 0; 2532 if (dst && max_bytes && type_width && max_bytes >= type_width) 2533 { 2534 // Ensure a null terminator independent of the number of bytes that is read. 2535 memset (dst, 0, max_bytes); 2536 size_t bytes_left = max_bytes - type_width; 2537 2538 const char terminator[4] = {'\0', '\0', '\0', '\0'}; 2539 assert(sizeof(terminator) >= type_width && 2540 "Attempting to validate a string with more than 4 bytes per character!"); 2541 2542 addr_t curr_addr = addr; 2543 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2544 char *curr_dst = dst; 2545 2546 error.Clear(); 2547 while (bytes_left > 0 && error.Success()) 2548 { 2549 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2550 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2551 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2552 2553 if (bytes_read == 0) 2554 break; 2555 2556 // Search for a null terminator of correct size and alignment in bytes_read 2557 size_t aligned_start = total_bytes_read - total_bytes_read % type_width; 2558 for (size_t i = aligned_start; i + type_width <= total_bytes_read + bytes_read; i += type_width) 2559 if (::strncmp(&dst[i], terminator, type_width) == 0) 2560 { 2561 error.Clear(); 2562 return i; 2563 } 2564 2565 total_bytes_read += bytes_read; 2566 curr_dst += bytes_read; 2567 curr_addr += bytes_read; 2568 bytes_left -= bytes_read; 2569 } 2570 } 2571 else 2572 { 2573 if (max_bytes) 2574 error.SetErrorString("invalid arguments"); 2575 } 2576 return total_bytes_read; 2577} 2578 2579// Deprecated in favor of ReadStringFromMemory which has wchar support and correct code to find 2580// null terminators. 2581size_t 2582Process::ReadCStringFromMemory (addr_t addr, char *dst, size_t dst_max_len, Error &result_error) 2583{ 2584 size_t total_cstr_len = 0; 2585 if (dst && dst_max_len) 2586 { 2587 result_error.Clear(); 2588 // NULL out everything just to be safe 2589 memset (dst, 0, dst_max_len); 2590 Error error; 2591 addr_t curr_addr = addr; 2592 const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize(); 2593 size_t bytes_left = dst_max_len - 1; 2594 char *curr_dst = dst; 2595 2596 while (bytes_left > 0) 2597 { 2598 addr_t cache_line_bytes_left = cache_line_size - (curr_addr % cache_line_size); 2599 addr_t bytes_to_read = std::min<addr_t>(bytes_left, cache_line_bytes_left); 2600 size_t bytes_read = ReadMemory (curr_addr, curr_dst, bytes_to_read, error); 2601 2602 if (bytes_read == 0) 2603 { 2604 result_error = error; 2605 dst[total_cstr_len] = '\0'; 2606 break; 2607 } 2608 const size_t len = strlen(curr_dst); 2609 2610 total_cstr_len += len; 2611 2612 if (len < bytes_to_read) 2613 break; 2614 2615 curr_dst += bytes_read; 2616 curr_addr += bytes_read; 2617 bytes_left -= bytes_read; 2618 } 2619 } 2620 else 2621 { 2622 if (dst == NULL) 2623 result_error.SetErrorString("invalid arguments"); 2624 else 2625 result_error.Clear(); 2626 } 2627 return total_cstr_len; 2628} 2629 2630size_t 2631Process::ReadMemoryFromInferior (addr_t addr, void *buf, size_t size, Error &error) 2632{ 2633 if (buf == NULL || size == 0) 2634 return 0; 2635 2636 size_t bytes_read = 0; 2637 uint8_t *bytes = (uint8_t *)buf; 2638 2639 while (bytes_read < size) 2640 { 2641 const size_t curr_size = size - bytes_read; 2642 const size_t curr_bytes_read = DoReadMemory (addr + bytes_read, 2643 bytes + bytes_read, 2644 curr_size, 2645 error); 2646 bytes_read += curr_bytes_read; 2647 if (curr_bytes_read == curr_size || curr_bytes_read == 0) 2648 break; 2649 } 2650 2651 // Replace any software breakpoint opcodes that fall into this range back 2652 // into "buf" before we return 2653 if (bytes_read > 0) 2654 RemoveBreakpointOpcodesFromBuffer (addr, bytes_read, (uint8_t *)buf); 2655 return bytes_read; 2656} 2657 2658uint64_t 2659Process::ReadUnsignedIntegerFromMemory (lldb::addr_t vm_addr, size_t integer_byte_size, uint64_t fail_value, Error &error) 2660{ 2661 Scalar scalar; 2662 if (ReadScalarIntegerFromMemory(vm_addr, integer_byte_size, false, scalar, error)) 2663 return scalar.ULongLong(fail_value); 2664 return fail_value; 2665} 2666 2667addr_t 2668Process::ReadPointerFromMemory (lldb::addr_t vm_addr, Error &error) 2669{ 2670 Scalar scalar; 2671 if (ReadScalarIntegerFromMemory(vm_addr, GetAddressByteSize(), false, scalar, error)) 2672 return scalar.ULongLong(LLDB_INVALID_ADDRESS); 2673 return LLDB_INVALID_ADDRESS; 2674} 2675 2676 2677bool 2678Process::WritePointerToMemory (lldb::addr_t vm_addr, 2679 lldb::addr_t ptr_value, 2680 Error &error) 2681{ 2682 Scalar scalar; 2683 const uint32_t addr_byte_size = GetAddressByteSize(); 2684 if (addr_byte_size <= 4) 2685 scalar = (uint32_t)ptr_value; 2686 else 2687 scalar = ptr_value; 2688 return WriteScalarToMemory(vm_addr, scalar, addr_byte_size, error) == addr_byte_size; 2689} 2690 2691size_t 2692Process::WriteMemoryPrivate (addr_t addr, const void *buf, size_t size, Error &error) 2693{ 2694 size_t bytes_written = 0; 2695 const uint8_t *bytes = (const uint8_t *)buf; 2696 2697 while (bytes_written < size) 2698 { 2699 const size_t curr_size = size - bytes_written; 2700 const size_t curr_bytes_written = DoWriteMemory (addr + bytes_written, 2701 bytes + bytes_written, 2702 curr_size, 2703 error); 2704 bytes_written += curr_bytes_written; 2705 if (curr_bytes_written == curr_size || curr_bytes_written == 0) 2706 break; 2707 } 2708 return bytes_written; 2709} 2710 2711size_t 2712Process::WriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2713{ 2714#if defined (ENABLE_MEMORY_CACHING) 2715 m_memory_cache.Flush (addr, size); 2716#endif 2717 2718 if (buf == NULL || size == 0) 2719 return 0; 2720 2721 m_mod_id.BumpMemoryID(); 2722 2723 // We need to write any data that would go where any current software traps 2724 // (enabled software breakpoints) any software traps (breakpoints) that we 2725 // may have placed in our tasks memory. 2726 2727 BreakpointSiteList bp_sites_in_range; 2728 2729 if (m_breakpoint_site_list.FindInRange (addr, addr + size, bp_sites_in_range)) 2730 { 2731 // No breakpoint sites overlap 2732 if (bp_sites_in_range.IsEmpty()) 2733 return WriteMemoryPrivate (addr, buf, size, error); 2734 else 2735 { 2736 const uint8_t *ubuf = (const uint8_t *)buf; 2737 uint64_t bytes_written = 0; 2738 2739 bp_sites_in_range.ForEach([this, addr, size, &bytes_written, &ubuf, &error](BreakpointSite *bp) -> void { 2740 2741 if (error.Success()) 2742 { 2743 addr_t intersect_addr; 2744 size_t intersect_size; 2745 size_t opcode_offset; 2746 const bool intersects = bp->IntersectsRange(addr, size, &intersect_addr, &intersect_size, &opcode_offset); 2747 assert(intersects); 2748 assert(addr <= intersect_addr && intersect_addr < addr + size); 2749 assert(addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= addr + size); 2750 assert(opcode_offset + intersect_size <= bp->GetByteSize()); 2751 2752 // Check for bytes before this breakpoint 2753 const addr_t curr_addr = addr + bytes_written; 2754 if (intersect_addr > curr_addr) 2755 { 2756 // There are some bytes before this breakpoint that we need to 2757 // just write to memory 2758 size_t curr_size = intersect_addr - curr_addr; 2759 size_t curr_bytes_written = WriteMemoryPrivate (curr_addr, 2760 ubuf + bytes_written, 2761 curr_size, 2762 error); 2763 bytes_written += curr_bytes_written; 2764 if (curr_bytes_written != curr_size) 2765 { 2766 // We weren't able to write all of the requested bytes, we 2767 // are done looping and will return the number of bytes that 2768 // we have written so far. 2769 if (error.Success()) 2770 error.SetErrorToGenericError(); 2771 } 2772 } 2773 // Now write any bytes that would cover up any software breakpoints 2774 // directly into the breakpoint opcode buffer 2775 ::memcpy(bp->GetSavedOpcodeBytes() + opcode_offset, ubuf + bytes_written, intersect_size); 2776 bytes_written += intersect_size; 2777 } 2778 }); 2779 2780 if (bytes_written < size) 2781 bytes_written += WriteMemoryPrivate (addr + bytes_written, 2782 ubuf + bytes_written, 2783 size - bytes_written, 2784 error); 2785 } 2786 } 2787 else 2788 { 2789 return WriteMemoryPrivate (addr, buf, size, error); 2790 } 2791 2792 // Write any remaining bytes after the last breakpoint if we have any left 2793 return 0; //bytes_written; 2794} 2795 2796size_t 2797Process::WriteScalarToMemory (addr_t addr, const Scalar &scalar, size_t byte_size, Error &error) 2798{ 2799 if (byte_size == UINT32_MAX) 2800 byte_size = scalar.GetByteSize(); 2801 if (byte_size > 0) 2802 { 2803 uint8_t buf[32]; 2804 const size_t mem_size = scalar.GetAsMemoryData (buf, byte_size, GetByteOrder(), error); 2805 if (mem_size > 0) 2806 return WriteMemory(addr, buf, mem_size, error); 2807 else 2808 error.SetErrorString ("failed to get scalar as memory data"); 2809 } 2810 else 2811 { 2812 error.SetErrorString ("invalid scalar value"); 2813 } 2814 return 0; 2815} 2816 2817size_t 2818Process::ReadScalarIntegerFromMemory (addr_t addr, 2819 uint32_t byte_size, 2820 bool is_signed, 2821 Scalar &scalar, 2822 Error &error) 2823{ 2824 uint64_t uval = 0; 2825 if (byte_size == 0) 2826 { 2827 error.SetErrorString ("byte size is zero"); 2828 } 2829 else if (byte_size & (byte_size - 1)) 2830 { 2831 error.SetErrorStringWithFormat ("byte size %u is not a power of 2", byte_size); 2832 } 2833 else if (byte_size <= sizeof(uval)) 2834 { 2835 const size_t bytes_read = ReadMemory (addr, &uval, byte_size, error); 2836 if (bytes_read == byte_size) 2837 { 2838 DataExtractor data (&uval, sizeof(uval), GetByteOrder(), GetAddressByteSize()); 2839 lldb::offset_t offset = 0; 2840 if (byte_size <= 4) 2841 scalar = data.GetMaxU32 (&offset, byte_size); 2842 else 2843 scalar = data.GetMaxU64 (&offset, byte_size); 2844 if (is_signed) 2845 scalar.SignExtend(byte_size * 8); 2846 return bytes_read; 2847 } 2848 } 2849 else 2850 { 2851 error.SetErrorStringWithFormat ("byte size of %u is too large for integer scalar type", byte_size); 2852 } 2853 return 0; 2854} 2855 2856#define USE_ALLOCATE_MEMORY_CACHE 1 2857addr_t 2858Process::AllocateMemory(size_t size, uint32_t permissions, Error &error) 2859{ 2860 if (GetPrivateState() != eStateStopped) 2861 return LLDB_INVALID_ADDRESS; 2862 2863#if defined (USE_ALLOCATE_MEMORY_CACHE) 2864 return m_allocated_memory_cache.AllocateMemory(size, permissions, error); 2865#else 2866 addr_t allocated_addr = DoAllocateMemory (size, permissions, error); 2867 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2868 if (log) 2869 log->Printf("Process::AllocateMemory(size=%" PRIu64 ", permissions=%s) => 0x%16.16" PRIx64 " (m_stop_id = %u m_memory_id = %u)", 2870 (uint64_t)size, 2871 GetPermissionsAsCString (permissions), 2872 (uint64_t)allocated_addr, 2873 m_mod_id.GetStopID(), 2874 m_mod_id.GetMemoryID()); 2875 return allocated_addr; 2876#endif 2877} 2878 2879bool 2880Process::CanJIT () 2881{ 2882 if (m_can_jit == eCanJITDontKnow) 2883 { 2884 Error err; 2885 2886 uint64_t allocated_memory = AllocateMemory(8, 2887 ePermissionsReadable | ePermissionsWritable | ePermissionsExecutable, 2888 err); 2889 2890 if (err.Success()) 2891 m_can_jit = eCanJITYes; 2892 else 2893 m_can_jit = eCanJITNo; 2894 2895 DeallocateMemory (allocated_memory); 2896 } 2897 2898 return m_can_jit == eCanJITYes; 2899} 2900 2901void 2902Process::SetCanJIT (bool can_jit) 2903{ 2904 m_can_jit = (can_jit ? eCanJITYes : eCanJITNo); 2905} 2906 2907Error 2908Process::DeallocateMemory (addr_t ptr) 2909{ 2910 Error error; 2911#if defined (USE_ALLOCATE_MEMORY_CACHE) 2912 if (!m_allocated_memory_cache.DeallocateMemory(ptr)) 2913 { 2914 error.SetErrorStringWithFormat ("deallocation of memory at 0x%" PRIx64 " failed.", (uint64_t)ptr); 2915 } 2916#else 2917 error = DoDeallocateMemory (ptr); 2918 2919 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 2920 if (log) 2921 log->Printf("Process::DeallocateMemory(addr=0x%16.16" PRIx64 ") => err = %s (m_stop_id = %u, m_memory_id = %u)", 2922 ptr, 2923 error.AsCString("SUCCESS"), 2924 m_mod_id.GetStopID(), 2925 m_mod_id.GetMemoryID()); 2926#endif 2927 return error; 2928} 2929 2930 2931ModuleSP 2932Process::ReadModuleFromMemory (const FileSpec& file_spec, 2933 lldb::addr_t header_addr) 2934{ 2935 ModuleSP module_sp (new Module (file_spec, ArchSpec())); 2936 if (module_sp) 2937 { 2938 Error error; 2939 ObjectFile *objfile = module_sp->GetMemoryObjectFile (shared_from_this(), header_addr, error); 2940 if (objfile) 2941 return module_sp; 2942 } 2943 return ModuleSP(); 2944} 2945 2946Error 2947Process::EnableWatchpoint (Watchpoint *watchpoint, bool notify) 2948{ 2949 Error error; 2950 error.SetErrorString("watchpoints are not supported"); 2951 return error; 2952} 2953 2954Error 2955Process::DisableWatchpoint (Watchpoint *watchpoint, bool notify) 2956{ 2957 Error error; 2958 error.SetErrorString("watchpoints are not supported"); 2959 return error; 2960} 2961 2962StateType 2963Process::WaitForProcessStopPrivate (const TimeValue *timeout, EventSP &event_sp) 2964{ 2965 StateType state; 2966 // Now wait for the process to launch and return control to us, and then 2967 // call DidLaunch: 2968 while (1) 2969 { 2970 event_sp.reset(); 2971 state = WaitForStateChangedEventsPrivate (timeout, event_sp); 2972 2973 if (StateIsStoppedState(state, false)) 2974 break; 2975 2976 // If state is invalid, then we timed out 2977 if (state == eStateInvalid) 2978 break; 2979 2980 if (event_sp) 2981 HandlePrivateEvent (event_sp); 2982 } 2983 return state; 2984} 2985 2986Error 2987Process::Launch (ProcessLaunchInfo &launch_info) 2988{ 2989 Error error; 2990 m_abi_sp.reset(); 2991 m_dyld_ap.reset(); 2992 m_system_runtime_ap.reset(); 2993 m_os_ap.reset(); 2994 m_process_input_reader.reset(); 2995 2996 Module *exe_module = m_target.GetExecutableModulePointer(); 2997 if (exe_module) 2998 { 2999 char local_exec_file_path[PATH_MAX]; 3000 char platform_exec_file_path[PATH_MAX]; 3001 exe_module->GetFileSpec().GetPath(local_exec_file_path, sizeof(local_exec_file_path)); 3002 exe_module->GetPlatformFileSpec().GetPath(platform_exec_file_path, sizeof(platform_exec_file_path)); 3003 if (exe_module->GetFileSpec().Exists()) 3004 { 3005 // Install anything that might need to be installed prior to launching. 3006 // For host systems, this will do nothing, but if we are connected to a 3007 // remote platform it will install any needed binaries 3008 error = GetTarget().Install(&launch_info); 3009 if (error.Fail()) 3010 return error; 3011 3012 if (PrivateStateThreadIsValid ()) 3013 PausePrivateStateThread (); 3014 3015 error = WillLaunch (exe_module); 3016 if (error.Success()) 3017 { 3018 const bool restarted = false; 3019 SetPublicState (eStateLaunching, restarted); 3020 m_should_detach = false; 3021 3022 if (m_public_run_lock.TrySetRunning()) 3023 { 3024 // Now launch using these arguments. 3025 error = DoLaunch (exe_module, launch_info); 3026 } 3027 else 3028 { 3029 // This shouldn't happen 3030 error.SetErrorString("failed to acquire process run lock"); 3031 } 3032 3033 if (error.Fail()) 3034 { 3035 if (GetID() != LLDB_INVALID_PROCESS_ID) 3036 { 3037 SetID (LLDB_INVALID_PROCESS_ID); 3038 const char *error_string = error.AsCString(); 3039 if (error_string == NULL) 3040 error_string = "launch failed"; 3041 SetExitStatus (-1, error_string); 3042 } 3043 } 3044 else 3045 { 3046 EventSP event_sp; 3047 TimeValue timeout_time; 3048 timeout_time = TimeValue::Now(); 3049 timeout_time.OffsetWithSeconds(10); 3050 StateType state = WaitForProcessStopPrivate(&timeout_time, event_sp); 3051 3052 if (state == eStateInvalid || event_sp.get() == NULL) 3053 { 3054 // We were able to launch the process, but we failed to 3055 // catch the initial stop. 3056 SetExitStatus (0, "failed to catch stop after launch"); 3057 Destroy(); 3058 } 3059 else if (state == eStateStopped || state == eStateCrashed) 3060 { 3061 3062 DidLaunch (); 3063 3064 DynamicLoader *dyld = GetDynamicLoader (); 3065 if (dyld) 3066 dyld->DidLaunch(); 3067 3068 SystemRuntime *system_runtime = GetSystemRuntime (); 3069 if (system_runtime) 3070 system_runtime->DidLaunch(); 3071 3072 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3073 // This delays passing the stopped event to listeners till DidLaunch gets 3074 // a chance to complete... 3075 HandlePrivateEvent (event_sp); 3076 3077 if (PrivateStateThreadIsValid ()) 3078 ResumePrivateStateThread (); 3079 else 3080 StartPrivateStateThread (); 3081 } 3082 else if (state == eStateExited) 3083 { 3084 // We exited while trying to launch somehow. Don't call DidLaunch as that's 3085 // not likely to work, and return an invalid pid. 3086 HandlePrivateEvent (event_sp); 3087 } 3088 } 3089 } 3090 } 3091 else 3092 { 3093 error.SetErrorStringWithFormat("file doesn't exist: '%s'", local_exec_file_path); 3094 } 3095 } 3096 return error; 3097} 3098 3099 3100Error 3101Process::LoadCore () 3102{ 3103 Error error = DoLoadCore(); 3104 if (error.Success()) 3105 { 3106 if (PrivateStateThreadIsValid ()) 3107 ResumePrivateStateThread (); 3108 else 3109 StartPrivateStateThread (); 3110 3111 DynamicLoader *dyld = GetDynamicLoader (); 3112 if (dyld) 3113 dyld->DidAttach(); 3114 3115 SystemRuntime *system_runtime = GetSystemRuntime (); 3116 if (system_runtime) 3117 system_runtime->DidAttach(); 3118 3119 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3120 // We successfully loaded a core file, now pretend we stopped so we can 3121 // show all of the threads in the core file and explore the crashed 3122 // state. 3123 SetPrivateState (eStateStopped); 3124 3125 } 3126 return error; 3127} 3128 3129DynamicLoader * 3130Process::GetDynamicLoader () 3131{ 3132 if (m_dyld_ap.get() == NULL) 3133 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 3134 return m_dyld_ap.get(); 3135} 3136 3137SystemRuntime * 3138Process::GetSystemRuntime () 3139{ 3140 if (m_system_runtime_ap.get() == NULL) 3141 m_system_runtime_ap.reset (SystemRuntime::FindPlugin(this)); 3142 return m_system_runtime_ap.get(); 3143} 3144 3145 3146Process::NextEventAction::EventActionResult 3147Process::AttachCompletionHandler::PerformAction (lldb::EventSP &event_sp) 3148{ 3149 StateType state = ProcessEventData::GetStateFromEvent (event_sp.get()); 3150 switch (state) 3151 { 3152 case eStateRunning: 3153 case eStateConnected: 3154 return eEventActionRetry; 3155 3156 case eStateStopped: 3157 case eStateCrashed: 3158 { 3159 // During attach, prior to sending the eStateStopped event, 3160 // lldb_private::Process subclasses must set the new process ID. 3161 assert (m_process->GetID() != LLDB_INVALID_PROCESS_ID); 3162 // We don't want these events to be reported, so go set the ShouldReportStop here: 3163 m_process->GetThreadList().SetShouldReportStop (eVoteNo); 3164 3165 if (m_exec_count > 0) 3166 { 3167 --m_exec_count; 3168 RequestResume(); 3169 return eEventActionRetry; 3170 } 3171 else 3172 { 3173 m_process->CompleteAttach (); 3174 return eEventActionSuccess; 3175 } 3176 } 3177 break; 3178 3179 default: 3180 case eStateExited: 3181 case eStateInvalid: 3182 break; 3183 } 3184 3185 m_exit_string.assign ("No valid Process"); 3186 return eEventActionExit; 3187} 3188 3189Process::NextEventAction::EventActionResult 3190Process::AttachCompletionHandler::HandleBeingInterrupted() 3191{ 3192 return eEventActionSuccess; 3193} 3194 3195const char * 3196Process::AttachCompletionHandler::GetExitString () 3197{ 3198 return m_exit_string.c_str(); 3199} 3200 3201Error 3202Process::Attach (ProcessAttachInfo &attach_info) 3203{ 3204 m_abi_sp.reset(); 3205 m_process_input_reader.reset(); 3206 m_dyld_ap.reset(); 3207 m_system_runtime_ap.reset(); 3208 m_os_ap.reset(); 3209 3210 lldb::pid_t attach_pid = attach_info.GetProcessID(); 3211 Error error; 3212 if (attach_pid == LLDB_INVALID_PROCESS_ID) 3213 { 3214 char process_name[PATH_MAX]; 3215 3216 if (attach_info.GetExecutableFile().GetPath (process_name, sizeof(process_name))) 3217 { 3218 const bool wait_for_launch = attach_info.GetWaitForLaunch(); 3219 3220 if (wait_for_launch) 3221 { 3222 error = WillAttachToProcessWithName(process_name, wait_for_launch); 3223 if (error.Success()) 3224 { 3225 if (m_public_run_lock.TrySetRunning()) 3226 { 3227 m_should_detach = true; 3228 const bool restarted = false; 3229 SetPublicState (eStateAttaching, restarted); 3230 // Now attach using these arguments. 3231 error = DoAttachToProcessWithName (process_name, attach_info); 3232 } 3233 else 3234 { 3235 // This shouldn't happen 3236 error.SetErrorString("failed to acquire process run lock"); 3237 } 3238 3239 if (error.Fail()) 3240 { 3241 if (GetID() != LLDB_INVALID_PROCESS_ID) 3242 { 3243 SetID (LLDB_INVALID_PROCESS_ID); 3244 if (error.AsCString() == NULL) 3245 error.SetErrorString("attach failed"); 3246 3247 SetExitStatus(-1, error.AsCString()); 3248 } 3249 } 3250 else 3251 { 3252 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3253 StartPrivateStateThread(); 3254 } 3255 return error; 3256 } 3257 } 3258 else 3259 { 3260 ProcessInstanceInfoList process_infos; 3261 PlatformSP platform_sp (m_target.GetPlatform ()); 3262 3263 if (platform_sp) 3264 { 3265 ProcessInstanceInfoMatch match_info; 3266 match_info.GetProcessInfo() = attach_info; 3267 match_info.SetNameMatchType (eNameMatchEquals); 3268 platform_sp->FindProcesses (match_info, process_infos); 3269 const uint32_t num_matches = process_infos.GetSize(); 3270 if (num_matches == 1) 3271 { 3272 attach_pid = process_infos.GetProcessIDAtIndex(0); 3273 // Fall through and attach using the above process ID 3274 } 3275 else 3276 { 3277 match_info.GetProcessInfo().GetExecutableFile().GetPath (process_name, sizeof(process_name)); 3278 if (num_matches > 1) 3279 error.SetErrorStringWithFormat ("more than one process named %s", process_name); 3280 else 3281 error.SetErrorStringWithFormat ("could not find a process named %s", process_name); 3282 } 3283 } 3284 else 3285 { 3286 error.SetErrorString ("invalid platform, can't find processes by name"); 3287 return error; 3288 } 3289 } 3290 } 3291 else 3292 { 3293 error.SetErrorString ("invalid process name"); 3294 } 3295 } 3296 3297 if (attach_pid != LLDB_INVALID_PROCESS_ID) 3298 { 3299 error = WillAttachToProcessWithID(attach_pid); 3300 if (error.Success()) 3301 { 3302 3303 if (m_public_run_lock.TrySetRunning()) 3304 { 3305 // Now attach using these arguments. 3306 m_should_detach = true; 3307 const bool restarted = false; 3308 SetPublicState (eStateAttaching, restarted); 3309 error = DoAttachToProcessWithID (attach_pid, attach_info); 3310 } 3311 else 3312 { 3313 // This shouldn't happen 3314 error.SetErrorString("failed to acquire process run lock"); 3315 } 3316 3317 if (error.Success()) 3318 { 3319 3320 SetNextEventAction(new Process::AttachCompletionHandler(this, attach_info.GetResumeCount())); 3321 StartPrivateStateThread(); 3322 } 3323 else 3324 { 3325 if (GetID() != LLDB_INVALID_PROCESS_ID) 3326 { 3327 SetID (LLDB_INVALID_PROCESS_ID); 3328 const char *error_string = error.AsCString(); 3329 if (error_string == NULL) 3330 error_string = "attach failed"; 3331 3332 SetExitStatus(-1, error_string); 3333 } 3334 } 3335 } 3336 } 3337 return error; 3338} 3339 3340void 3341Process::CompleteAttach () 3342{ 3343 // Let the process subclass figure out at much as it can about the process 3344 // before we go looking for a dynamic loader plug-in. 3345 DidAttach(); 3346 3347 // We just attached. If we have a platform, ask it for the process architecture, and if it isn't 3348 // the same as the one we've already set, switch architectures. 3349 PlatformSP platform_sp (m_target.GetPlatform ()); 3350 assert (platform_sp.get()); 3351 if (platform_sp) 3352 { 3353 const ArchSpec &target_arch = m_target.GetArchitecture(); 3354 if (target_arch.IsValid() && !platform_sp->IsCompatibleArchitecture (target_arch, false, NULL)) 3355 { 3356 ArchSpec platform_arch; 3357 platform_sp = platform_sp->GetPlatformForArchitecture (target_arch, &platform_arch); 3358 if (platform_sp) 3359 { 3360 m_target.SetPlatform (platform_sp); 3361 m_target.SetArchitecture(platform_arch); 3362 } 3363 } 3364 else 3365 { 3366 ProcessInstanceInfo process_info; 3367 platform_sp->GetProcessInfo (GetID(), process_info); 3368 const ArchSpec &process_arch = process_info.GetArchitecture(); 3369 if (process_arch.IsValid() && !m_target.GetArchitecture().IsExactMatch(process_arch)) 3370 m_target.SetArchitecture (process_arch); 3371 } 3372 } 3373 3374 // We have completed the attach, now it is time to find the dynamic loader 3375 // plug-in 3376 DynamicLoader *dyld = GetDynamicLoader (); 3377 if (dyld) 3378 dyld->DidAttach(); 3379 3380 SystemRuntime *system_runtime = GetSystemRuntime (); 3381 if (system_runtime) 3382 system_runtime->DidAttach(); 3383 3384 m_os_ap.reset (OperatingSystem::FindPlugin (this, NULL)); 3385 // Figure out which one is the executable, and set that in our target: 3386 const ModuleList &target_modules = m_target.GetImages(); 3387 Mutex::Locker modules_locker(target_modules.GetMutex()); 3388 size_t num_modules = target_modules.GetSize(); 3389 ModuleSP new_executable_module_sp; 3390 3391 for (size_t i = 0; i < num_modules; i++) 3392 { 3393 ModuleSP module_sp (target_modules.GetModuleAtIndexUnlocked (i)); 3394 if (module_sp && module_sp->IsExecutable()) 3395 { 3396 if (m_target.GetExecutableModulePointer() != module_sp.get()) 3397 new_executable_module_sp = module_sp; 3398 break; 3399 } 3400 } 3401 if (new_executable_module_sp) 3402 m_target.SetExecutableModule (new_executable_module_sp, false); 3403} 3404 3405Error 3406Process::ConnectRemote (Stream *strm, const char *remote_url) 3407{ 3408 m_abi_sp.reset(); 3409 m_process_input_reader.reset(); 3410 3411 // Find the process and its architecture. Make sure it matches the architecture 3412 // of the current Target, and if not adjust it. 3413 3414 Error error (DoConnectRemote (strm, remote_url)); 3415 if (error.Success()) 3416 { 3417 if (GetID() != LLDB_INVALID_PROCESS_ID) 3418 { 3419 EventSP event_sp; 3420 StateType state = WaitForProcessStopPrivate(NULL, event_sp); 3421 3422 if (state == eStateStopped || state == eStateCrashed) 3423 { 3424 // If we attached and actually have a process on the other end, then 3425 // this ended up being the equivalent of an attach. 3426 CompleteAttach (); 3427 3428 // This delays passing the stopped event to listeners till 3429 // CompleteAttach gets a chance to complete... 3430 HandlePrivateEvent (event_sp); 3431 3432 } 3433 } 3434 3435 if (PrivateStateThreadIsValid ()) 3436 ResumePrivateStateThread (); 3437 else 3438 StartPrivateStateThread (); 3439 } 3440 return error; 3441} 3442 3443 3444Error 3445Process::PrivateResume () 3446{ 3447 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_STEP)); 3448 if (log) 3449 log->Printf("Process::PrivateResume() m_stop_id = %u, public state: %s private state: %s", 3450 m_mod_id.GetStopID(), 3451 StateAsCString(m_public_state.GetValue()), 3452 StateAsCString(m_private_state.GetValue())); 3453 3454 Error error (WillResume()); 3455 // Tell the process it is about to resume before the thread list 3456 if (error.Success()) 3457 { 3458 // Now let the thread list know we are about to resume so it 3459 // can let all of our threads know that they are about to be 3460 // resumed. Threads will each be called with 3461 // Thread::WillResume(StateType) where StateType contains the state 3462 // that they are supposed to have when the process is resumed 3463 // (suspended/running/stepping). Threads should also check 3464 // their resume signal in lldb::Thread::GetResumeSignal() 3465 // to see if they are supposed to start back up with a signal. 3466 if (m_thread_list.WillResume()) 3467 { 3468 // Last thing, do the PreResumeActions. 3469 if (!RunPreResumeActions()) 3470 { 3471 error.SetErrorStringWithFormat ("Process::PrivateResume PreResumeActions failed, not resuming."); 3472 } 3473 else 3474 { 3475 m_mod_id.BumpResumeID(); 3476 error = DoResume(); 3477 if (error.Success()) 3478 { 3479 DidResume(); 3480 m_thread_list.DidResume(); 3481 if (log) 3482 log->Printf ("Process thinks the process has resumed."); 3483 } 3484 } 3485 } 3486 else 3487 { 3488 // Somebody wanted to run without running. So generate a continue & a stopped event, 3489 // and let the world handle them. 3490 if (log) 3491 log->Printf ("Process::PrivateResume() asked to simulate a start & stop."); 3492 3493 SetPrivateState(eStateRunning); 3494 SetPrivateState(eStateStopped); 3495 } 3496 } 3497 else if (log) 3498 log->Printf ("Process::PrivateResume() got an error \"%s\".", error.AsCString("<unknown error>")); 3499 return error; 3500} 3501 3502Error 3503Process::Halt (bool clear_thread_plans) 3504{ 3505 // Don't clear the m_clear_thread_plans_on_stop, only set it to true if 3506 // in case it was already set and some thread plan logic calls halt on its 3507 // own. 3508 m_clear_thread_plans_on_stop |= clear_thread_plans; 3509 3510 // First make sure we aren't in the middle of handling an event, or we might restart. This is pretty weak, since 3511 // we could just straightaway get another event. It just narrows the window... 3512 m_currently_handling_event.WaitForValueEqualTo(false); 3513 3514 3515 // Pause our private state thread so we can ensure no one else eats 3516 // the stop event out from under us. 3517 Listener halt_listener ("lldb.process.halt_listener"); 3518 HijackPrivateProcessEvents(&halt_listener); 3519 3520 EventSP event_sp; 3521 Error error (WillHalt()); 3522 3523 if (error.Success()) 3524 { 3525 3526 bool caused_stop = false; 3527 3528 // Ask the process subclass to actually halt our process 3529 error = DoHalt(caused_stop); 3530 if (error.Success()) 3531 { 3532 if (m_public_state.GetValue() == eStateAttaching) 3533 { 3534 SetExitStatus(SIGKILL, "Cancelled async attach."); 3535 Destroy (); 3536 } 3537 else 3538 { 3539 // If "caused_stop" is true, then DoHalt stopped the process. If 3540 // "caused_stop" is false, the process was already stopped. 3541 // If the DoHalt caused the process to stop, then we want to catch 3542 // this event and set the interrupted bool to true before we pass 3543 // this along so clients know that the process was interrupted by 3544 // a halt command. 3545 if (caused_stop) 3546 { 3547 // Wait for 1 second for the process to stop. 3548 TimeValue timeout_time; 3549 timeout_time = TimeValue::Now(); 3550 timeout_time.OffsetWithSeconds(1); 3551 bool got_event = halt_listener.WaitForEvent (&timeout_time, event_sp); 3552 StateType state = ProcessEventData::GetStateFromEvent(event_sp.get()); 3553 3554 if (!got_event || state == eStateInvalid) 3555 { 3556 // We timeout out and didn't get a stop event... 3557 error.SetErrorStringWithFormat ("Halt timed out. State = %s", StateAsCString(GetState())); 3558 } 3559 else 3560 { 3561 if (StateIsStoppedState (state, false)) 3562 { 3563 // We caused the process to interrupt itself, so mark this 3564 // as such in the stop event so clients can tell an interrupted 3565 // process from a natural stop 3566 ProcessEventData::SetInterruptedInEvent (event_sp.get(), true); 3567 } 3568 else 3569 { 3570 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3571 if (log) 3572 log->Printf("Process::Halt() failed to stop, state is: %s", StateAsCString(state)); 3573 error.SetErrorString ("Did not get stopped event after halt."); 3574 } 3575 } 3576 } 3577 DidHalt(); 3578 } 3579 } 3580 } 3581 // Resume our private state thread before we post the event (if any) 3582 RestorePrivateProcessEvents(); 3583 3584 // Post any event we might have consumed. If all goes well, we will have 3585 // stopped the process, intercepted the event and set the interrupted 3586 // bool in the event. Post it to the private event queue and that will end up 3587 // correctly setting the state. 3588 if (event_sp) 3589 m_private_state_broadcaster.BroadcastEvent(event_sp); 3590 3591 return error; 3592} 3593 3594Error 3595Process::HaltForDestroyOrDetach(lldb::EventSP &exit_event_sp) 3596{ 3597 Error error; 3598 if (m_public_state.GetValue() == eStateRunning) 3599 { 3600 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 3601 if (log) 3602 log->Printf("Process::Destroy() About to halt."); 3603 error = Halt(); 3604 if (error.Success()) 3605 { 3606 // Consume the halt event. 3607 TimeValue timeout (TimeValue::Now()); 3608 timeout.OffsetWithSeconds(1); 3609 StateType state = WaitForProcessToStop (&timeout, &exit_event_sp); 3610 3611 // If the process exited while we were waiting for it to stop, put the exited event into 3612 // the shared pointer passed in and return. Our caller doesn't need to do anything else, since 3613 // they don't have a process anymore... 3614 3615 if (state == eStateExited || m_private_state.GetValue() == eStateExited) 3616 { 3617 if (log) 3618 log->Printf("Process::HaltForDestroyOrDetach() Process exited while waiting to Halt."); 3619 return error; 3620 } 3621 else 3622 exit_event_sp.reset(); // It is ok to consume any non-exit stop events 3623 3624 if (state != eStateStopped) 3625 { 3626 if (log) 3627 log->Printf("Process::HaltForDestroyOrDetach() Halt failed to stop, state is: %s", StateAsCString(state)); 3628 // If we really couldn't stop the process then we should just error out here, but if the 3629 // lower levels just bobbled sending the event and we really are stopped, then continue on. 3630 StateType private_state = m_private_state.GetValue(); 3631 if (private_state != eStateStopped) 3632 { 3633 return error; 3634 } 3635 } 3636 } 3637 else 3638 { 3639 if (log) 3640 log->Printf("Process::HaltForDestroyOrDetach() Halt got error: %s", error.AsCString()); 3641 } 3642 } 3643 return error; 3644} 3645 3646Error 3647Process::Detach (bool keep_stopped) 3648{ 3649 EventSP exit_event_sp; 3650 Error error; 3651 m_destroy_in_process = true; 3652 3653 error = WillDetach(); 3654 3655 if (error.Success()) 3656 { 3657 if (DetachRequiresHalt()) 3658 { 3659 error = HaltForDestroyOrDetach (exit_event_sp); 3660 if (!error.Success()) 3661 { 3662 m_destroy_in_process = false; 3663 return error; 3664 } 3665 else if (exit_event_sp) 3666 { 3667 // We shouldn't need to do anything else here. There's no process left to detach from... 3668 StopPrivateStateThread(); 3669 m_destroy_in_process = false; 3670 return error; 3671 } 3672 } 3673 3674 error = DoDetach(keep_stopped); 3675 if (error.Success()) 3676 { 3677 DidDetach(); 3678 StopPrivateStateThread(); 3679 } 3680 else 3681 { 3682 return error; 3683 } 3684 } 3685 m_destroy_in_process = false; 3686 3687 // If we exited when we were waiting for a process to stop, then 3688 // forward the event here so we don't lose the event 3689 if (exit_event_sp) 3690 { 3691 // Directly broadcast our exited event because we shut down our 3692 // private state thread above 3693 BroadcastEvent(exit_event_sp); 3694 } 3695 3696 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 3697 // the last events through the event system, in which case we might strand the write lock. Unlock 3698 // it here so when we do to tear down the process we don't get an error destroying the lock. 3699 3700 m_public_run_lock.SetStopped(); 3701 return error; 3702} 3703 3704Error 3705Process::Destroy () 3706{ 3707 3708 // Tell ourselves we are in the process of destroying the process, so that we don't do any unnecessary work 3709 // that might hinder the destruction. Remember to set this back to false when we are done. That way if the attempt 3710 // failed and the process stays around for some reason it won't be in a confused state. 3711 3712 m_destroy_in_process = true; 3713 3714 Error error (WillDestroy()); 3715 if (error.Success()) 3716 { 3717 EventSP exit_event_sp; 3718 if (DestroyRequiresHalt()) 3719 { 3720 error = HaltForDestroyOrDetach(exit_event_sp); 3721 } 3722 3723 if (m_public_state.GetValue() != eStateRunning) 3724 { 3725 // Ditch all thread plans, and remove all our breakpoints: in case we have to restart the target to 3726 // kill it, we don't want it hitting a breakpoint... 3727 // Only do this if we've stopped, however, since if we didn't manage to halt it above, then 3728 // we're not going to have much luck doing this now. 3729 m_thread_list.DiscardThreadPlans(); 3730 DisableAllBreakpointSites(); 3731 } 3732 3733 error = DoDestroy(); 3734 if (error.Success()) 3735 { 3736 DidDestroy(); 3737 StopPrivateStateThread(); 3738 } 3739 m_stdio_communication.StopReadThread(); 3740 m_stdio_communication.Disconnect(); 3741 if (m_process_input_reader) 3742 m_process_input_reader.reset(); 3743 3744 // If we exited when we were waiting for a process to stop, then 3745 // forward the event here so we don't lose the event 3746 if (exit_event_sp) 3747 { 3748 // Directly broadcast our exited event because we shut down our 3749 // private state thread above 3750 BroadcastEvent(exit_event_sp); 3751 } 3752 3753 // If we have been interrupted (to kill us) in the middle of running, we may not end up propagating 3754 // the last events through the event system, in which case we might strand the write lock. Unlock 3755 // it here so when we do to tear down the process we don't get an error destroying the lock. 3756 m_public_run_lock.SetStopped(); 3757 } 3758 3759 m_destroy_in_process = false; 3760 3761 return error; 3762} 3763 3764Error 3765Process::Signal (int signal) 3766{ 3767 Error error (WillSignal()); 3768 if (error.Success()) 3769 { 3770 error = DoSignal(signal); 3771 if (error.Success()) 3772 DidSignal(); 3773 } 3774 return error; 3775} 3776 3777lldb::ByteOrder 3778Process::GetByteOrder () const 3779{ 3780 return m_target.GetArchitecture().GetByteOrder(); 3781} 3782 3783uint32_t 3784Process::GetAddressByteSize () const 3785{ 3786 return m_target.GetArchitecture().GetAddressByteSize(); 3787} 3788 3789 3790bool 3791Process::ShouldBroadcastEvent (Event *event_ptr) 3792{ 3793 const StateType state = Process::ProcessEventData::GetStateFromEvent (event_ptr); 3794 bool return_value = true; 3795 Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_EVENTS | LIBLLDB_LOG_PROCESS)); 3796 3797 switch (state) 3798 { 3799 case eStateConnected: 3800 case eStateAttaching: 3801 case eStateLaunching: 3802 case eStateDetached: 3803 case eStateExited: 3804 case eStateUnloaded: 3805 // These events indicate changes in the state of the debugging session, always report them. 3806 return_value = true; 3807 break; 3808 case eStateInvalid: 3809 // We stopped for no apparent reason, don't report it. 3810 return_value = false; 3811 break; 3812 case eStateRunning: 3813 case eStateStepping: 3814 // If we've started the target running, we handle the cases where we 3815 // are already running and where there is a transition from stopped to 3816 // running differently. 3817 // running -> running: Automatically suppress extra running events 3818 // stopped -> running: Report except when there is one or more no votes 3819 // and no yes votes. 3820 SynchronouslyNotifyStateChanged (state); 3821 if (m_force_next_event_delivery) 3822 return_value = true; 3823 else 3824 { 3825 switch (m_last_broadcast_state) 3826 { 3827 case eStateRunning: 3828 case eStateStepping: 3829 // We always suppress multiple runnings with no PUBLIC stop in between. 3830 return_value = false; 3831 break; 3832 default: 3833 // TODO: make this work correctly. For now always report 3834 // run if we aren't running so we don't miss any runnning 3835 // events. If I run the lldb/test/thread/a.out file and 3836 // break at main.cpp:58, run and hit the breakpoints on 3837 // multiple threads, then somehow during the stepping over 3838 // of all breakpoints no run gets reported. 3839 3840 // This is a transition from stop to run. 3841 switch (m_thread_list.ShouldReportRun (event_ptr)) 3842 { 3843 case eVoteYes: 3844 case eVoteNoOpinion: 3845 return_value = true; 3846 break; 3847 case eVoteNo: 3848 return_value = false; 3849 break; 3850 } 3851 break; 3852 } 3853 } 3854 break; 3855 case eStateStopped: 3856 case eStateCrashed: 3857 case eStateSuspended: 3858 { 3859 // We've stopped. First see if we're going to restart the target. 3860 // If we are going to stop, then we always broadcast the event. 3861 // If we aren't going to stop, let the thread plans decide if we're going to report this event. 3862 // If no thread has an opinion, we don't report it. 3863 3864 RefreshStateAfterStop (); 3865 if (ProcessEventData::GetInterruptedFromEvent (event_ptr)) 3866 { 3867 if (log) 3868 log->Printf ("Process::ShouldBroadcastEvent (%p) stopped due to an interrupt, state: %s", 3869 event_ptr, 3870 StateAsCString(state)); 3871 return_value = true; 3872 } 3873 else 3874 { 3875 bool was_restarted = ProcessEventData::GetRestartedFromEvent (event_ptr); 3876 bool should_resume = false; 3877 3878 // It makes no sense to ask "ShouldStop" if we've already been restarted... 3879 // Asking the thread list is also not likely to go well, since we are running again. 3880 // So in that case just report the event. 3881 3882 if (!was_restarted) 3883 should_resume = m_thread_list.ShouldStop (event_ptr) == false; 3884 3885 if (was_restarted || should_resume || m_resume_requested) 3886 { 3887 Vote stop_vote = m_thread_list.ShouldReportStop (event_ptr); 3888 if (log) 3889 log->Printf ("Process::ShouldBroadcastEvent: should_stop: %i state: %s was_restarted: %i stop_vote: %d.", 3890 should_resume, 3891 StateAsCString(state), 3892 was_restarted, 3893 stop_vote); 3894 3895 switch (stop_vote) 3896 { 3897 case eVoteYes: 3898 return_value = true; 3899 break; 3900 case eVoteNoOpinion: 3901 case eVoteNo: 3902 return_value = false; 3903 break; 3904 } 3905 3906 if (!was_restarted) 3907 { 3908 if (log) 3909 log->Printf ("Process::ShouldBroadcastEvent (%p) Restarting process from state: %s", event_ptr, StateAsCString(state)); 3910 ProcessEventData::SetRestartedInEvent(event_ptr, true); 3911 PrivateResume (); 3912 } 3913 3914 } 3915 else 3916 { 3917 return_value = true; 3918 SynchronouslyNotifyStateChanged (state); 3919 } 3920 } 3921 } 3922 break; 3923 } 3924 3925 // Forcing the next event delivery is a one shot deal. So reset it here. 3926 m_force_next_event_delivery = false; 3927 3928 // We do some coalescing of events (for instance two consecutive running events get coalesced.) 3929 // But we only coalesce against events we actually broadcast. So we use m_last_broadcast_state 3930 // to track that. NB - you can't use "m_public_state.GetValue()" for that purpose, as was originally done, 3931 // because the PublicState reflects the last event pulled off the queue, and there may be several 3932 // events stacked up on the queue unserviced. So the PublicState may not reflect the last broadcasted event 3933 // yet. m_last_broadcast_state gets updated here. 3934 3935 if (return_value) 3936 m_last_broadcast_state = state; 3937 3938 if (log) 3939 log->Printf ("Process::ShouldBroadcastEvent (%p) => new state: %s, last broadcast state: %s - %s", 3940 event_ptr, 3941 StateAsCString(state), 3942 StateAsCString(m_last_broadcast_state), 3943 return_value ? "YES" : "NO"); 3944 return return_value; 3945} 3946 3947 3948bool 3949Process::StartPrivateStateThread (bool force) 3950{ 3951 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EVENTS)); 3952 3953 bool already_running = PrivateStateThreadIsValid (); 3954 if (log) 3955 log->Printf ("Process::%s()%s ", __FUNCTION__, already_running ? " already running" : " starting private state thread"); 3956 3957 if (!force && already_running) 3958 return true; 3959 3960 // Create a thread that watches our internal state and controls which 3961 // events make it to clients (into the DCProcess event queue). 3962 char thread_name[1024]; 3963 if (already_running) 3964 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state-override(pid=%" PRIu64 ")>", GetID()); 3965 else 3966 snprintf(thread_name, sizeof(thread_name), "<lldb.process.internal-state(pid=%" PRIu64 ")>", GetID()); 3967 3968 // Create the private state thread, and start it running. 3969 m_private_state_thread = Host::ThreadCreate (thread_name, Process::PrivateStateThread, this, NULL); 3970 bool success = IS_VALID_LLDB_HOST_THREAD(m_private_state_thread); 3971 if (success) 3972 { 3973 ResumePrivateStateThread(); 3974 return true; 3975 } 3976 else 3977 return false; 3978} 3979 3980void 3981Process::PausePrivateStateThread () 3982{ 3983 ControlPrivateStateThread (eBroadcastInternalStateControlPause); 3984} 3985 3986void 3987Process::ResumePrivateStateThread () 3988{ 3989 ControlPrivateStateThread (eBroadcastInternalStateControlResume); 3990} 3991 3992void 3993Process::StopPrivateStateThread () 3994{ 3995 if (PrivateStateThreadIsValid ()) 3996 ControlPrivateStateThread (eBroadcastInternalStateControlStop); 3997 else 3998 { 3999 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4000 if (log) 4001 log->Printf ("Went to stop the private state thread, but it was already invalid."); 4002 } 4003} 4004 4005void 4006Process::ControlPrivateStateThread (uint32_t signal) 4007{ 4008 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 4009 4010 assert (signal == eBroadcastInternalStateControlStop || 4011 signal == eBroadcastInternalStateControlPause || 4012 signal == eBroadcastInternalStateControlResume); 4013 4014 if (log) 4015 log->Printf ("Process::%s (signal = %d)", __FUNCTION__, signal); 4016 4017 // Signal the private state thread. First we should copy this is case the 4018 // thread starts exiting since the private state thread will NULL this out 4019 // when it exits 4020 const lldb::thread_t private_state_thread = m_private_state_thread; 4021 if (IS_VALID_LLDB_HOST_THREAD(private_state_thread)) 4022 { 4023 TimeValue timeout_time; 4024 bool timed_out; 4025 4026 m_private_state_control_broadcaster.BroadcastEvent (signal, NULL); 4027 4028 timeout_time = TimeValue::Now(); 4029 timeout_time.OffsetWithSeconds(2); 4030 if (log) 4031 log->Printf ("Sending control event of type: %d.", signal); 4032 m_private_state_control_wait.WaitForValueEqualTo (true, &timeout_time, &timed_out); 4033 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4034 4035 if (signal == eBroadcastInternalStateControlStop) 4036 { 4037 if (timed_out) 4038 { 4039 Error error; 4040 Host::ThreadCancel (private_state_thread, &error); 4041 if (log) 4042 log->Printf ("Timed out responding to the control event, cancel got error: \"%s\".", error.AsCString()); 4043 } 4044 else 4045 { 4046 if (log) 4047 log->Printf ("The control event killed the private state thread without having to cancel."); 4048 } 4049 4050 thread_result_t result = NULL; 4051 Host::ThreadJoin (private_state_thread, &result, NULL); 4052 m_private_state_thread = LLDB_INVALID_HOST_THREAD; 4053 } 4054 } 4055 else 4056 { 4057 if (log) 4058 log->Printf ("Private state thread already dead, no need to signal it to stop."); 4059 } 4060} 4061 4062void 4063Process::SendAsyncInterrupt () 4064{ 4065 if (PrivateStateThreadIsValid()) 4066 m_private_state_broadcaster.BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4067 else 4068 BroadcastEvent (Process::eBroadcastBitInterrupt, NULL); 4069} 4070 4071void 4072Process::HandlePrivateEvent (EventSP &event_sp) 4073{ 4074 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4075 m_resume_requested = false; 4076 4077 m_currently_handling_event.SetValue(true, eBroadcastNever); 4078 4079 const StateType new_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4080 4081 // First check to see if anybody wants a shot at this event: 4082 if (m_next_event_action_ap.get() != NULL) 4083 { 4084 NextEventAction::EventActionResult action_result = m_next_event_action_ap->PerformAction(event_sp); 4085 if (log) 4086 log->Printf ("Ran next event action, result was %d.", action_result); 4087 4088 switch (action_result) 4089 { 4090 case NextEventAction::eEventActionSuccess: 4091 SetNextEventAction(NULL); 4092 break; 4093 4094 case NextEventAction::eEventActionRetry: 4095 break; 4096 4097 case NextEventAction::eEventActionExit: 4098 // Handle Exiting Here. If we already got an exited event, 4099 // we should just propagate it. Otherwise, swallow this event, 4100 // and set our state to exit so the next event will kill us. 4101 if (new_state != eStateExited) 4102 { 4103 // FIXME: should cons up an exited event, and discard this one. 4104 SetExitStatus(0, m_next_event_action_ap->GetExitString()); 4105 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4106 SetNextEventAction(NULL); 4107 return; 4108 } 4109 SetNextEventAction(NULL); 4110 break; 4111 } 4112 } 4113 4114 // See if we should broadcast this state to external clients? 4115 const bool should_broadcast = ShouldBroadcastEvent (event_sp.get()); 4116 4117 if (should_broadcast) 4118 { 4119 if (log) 4120 { 4121 log->Printf ("Process::%s (pid = %" PRIu64 ") broadcasting new state %s (old state %s) to %s", 4122 __FUNCTION__, 4123 GetID(), 4124 StateAsCString(new_state), 4125 StateAsCString (GetState ()), 4126 IsHijackedForEvent(eBroadcastBitStateChanged) ? "hijacked" : "public"); 4127 } 4128 Process::ProcessEventData::SetUpdateStateOnRemoval(event_sp.get()); 4129 if (StateIsRunningState (new_state)) 4130 { 4131 // Only push the input handler if we aren't fowarding events, 4132 // as this means the curses GUI is in use... 4133 if (!GetTarget().GetDebugger().IsForwardingEvents()) 4134 PushProcessIOHandler (); 4135 } 4136 else if (!Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 4137 PopProcessIOHandler (); 4138 4139 BroadcastEvent (event_sp); 4140 } 4141 else 4142 { 4143 if (log) 4144 { 4145 log->Printf ("Process::%s (pid = %" PRIu64 ") suppressing state %s (old state %s): should_broadcast == false", 4146 __FUNCTION__, 4147 GetID(), 4148 StateAsCString(new_state), 4149 StateAsCString (GetState ())); 4150 } 4151 } 4152 m_currently_handling_event.SetValue(false, eBroadcastAlways); 4153} 4154 4155thread_result_t 4156Process::PrivateStateThread (void *arg) 4157{ 4158 Process *proc = static_cast<Process*> (arg); 4159 thread_result_t result = proc->RunPrivateStateThread(); 4160 return result; 4161} 4162 4163thread_result_t 4164Process::RunPrivateStateThread () 4165{ 4166 bool control_only = true; 4167 m_private_state_control_wait.SetValue (false, eBroadcastNever); 4168 4169 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4170 if (log) 4171 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, this, GetID()); 4172 4173 bool exit_now = false; 4174 while (!exit_now) 4175 { 4176 EventSP event_sp; 4177 WaitForEventsPrivate (NULL, event_sp, control_only); 4178 if (event_sp->BroadcasterIs(&m_private_state_control_broadcaster)) 4179 { 4180 if (log) 4181 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") got a control event: %d", __FUNCTION__, this, GetID(), event_sp->GetType()); 4182 4183 switch (event_sp->GetType()) 4184 { 4185 case eBroadcastInternalStateControlStop: 4186 exit_now = true; 4187 break; // doing any internal state managment below 4188 4189 case eBroadcastInternalStateControlPause: 4190 control_only = true; 4191 break; 4192 4193 case eBroadcastInternalStateControlResume: 4194 control_only = false; 4195 break; 4196 } 4197 4198 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4199 continue; 4200 } 4201 else if (event_sp->GetType() == eBroadcastBitInterrupt) 4202 { 4203 if (m_public_state.GetValue() == eStateAttaching) 4204 { 4205 if (log) 4206 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt while attaching - forwarding interrupt.", __FUNCTION__, this, GetID()); 4207 BroadcastEvent (eBroadcastBitInterrupt, NULL); 4208 } 4209 else 4210 { 4211 if (log) 4212 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") woke up with an interrupt - Halting.", __FUNCTION__, this, GetID()); 4213 Halt(); 4214 } 4215 continue; 4216 } 4217 4218 const StateType internal_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 4219 4220 if (internal_state != eStateInvalid) 4221 { 4222 if (m_clear_thread_plans_on_stop && 4223 StateIsStoppedState(internal_state, true)) 4224 { 4225 m_clear_thread_plans_on_stop = false; 4226 m_thread_list.DiscardThreadPlans(); 4227 } 4228 HandlePrivateEvent (event_sp); 4229 } 4230 4231 if (internal_state == eStateInvalid || 4232 internal_state == eStateExited || 4233 internal_state == eStateDetached ) 4234 { 4235 if (log) 4236 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") about to exit with internal state %s...", __FUNCTION__, this, GetID(), StateAsCString(internal_state)); 4237 4238 break; 4239 } 4240 } 4241 4242 // Verify log is still enabled before attempting to write to it... 4243 if (log) 4244 log->Printf ("Process::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, this, GetID()); 4245 4246 m_public_run_lock.SetStopped(); 4247 m_private_state_control_wait.SetValue (true, eBroadcastAlways); 4248 m_private_state_thread = LLDB_INVALID_HOST_THREAD; 4249 return NULL; 4250} 4251 4252//------------------------------------------------------------------ 4253// Process Event Data 4254//------------------------------------------------------------------ 4255 4256Process::ProcessEventData::ProcessEventData () : 4257 EventData (), 4258 m_process_sp (), 4259 m_state (eStateInvalid), 4260 m_restarted (false), 4261 m_update_state (0), 4262 m_interrupted (false) 4263{ 4264} 4265 4266Process::ProcessEventData::ProcessEventData (const ProcessSP &process_sp, StateType state) : 4267 EventData (), 4268 m_process_sp (process_sp), 4269 m_state (state), 4270 m_restarted (false), 4271 m_update_state (0), 4272 m_interrupted (false) 4273{ 4274} 4275 4276Process::ProcessEventData::~ProcessEventData() 4277{ 4278} 4279 4280const ConstString & 4281Process::ProcessEventData::GetFlavorString () 4282{ 4283 static ConstString g_flavor ("Process::ProcessEventData"); 4284 return g_flavor; 4285} 4286 4287const ConstString & 4288Process::ProcessEventData::GetFlavor () const 4289{ 4290 return ProcessEventData::GetFlavorString (); 4291} 4292 4293void 4294Process::ProcessEventData::DoOnRemoval (Event *event_ptr) 4295{ 4296 // This function gets called twice for each event, once when the event gets pulled 4297 // off of the private process event queue, and then any number of times, first when it gets pulled off of 4298 // the public event queue, then other times when we're pretending that this is where we stopped at the 4299 // end of expression evaluation. m_update_state is used to distinguish these 4300 // three cases; it is 0 when we're just pulling it off for private handling, 4301 // and > 1 for expression evaluation, and we don't want to do the breakpoint command handling then. 4302 if (m_update_state != 1) 4303 return; 4304 4305 m_process_sp->SetPublicState (m_state, Process::ProcessEventData::GetRestartedFromEvent(event_ptr)); 4306 4307 // If we're stopped and haven't restarted, then do the breakpoint commands here: 4308 if (m_state == eStateStopped && ! m_restarted) 4309 { 4310 ThreadList &curr_thread_list = m_process_sp->GetThreadList(); 4311 uint32_t num_threads = curr_thread_list.GetSize(); 4312 uint32_t idx; 4313 4314 // The actions might change one of the thread's stop_info's opinions about whether we should 4315 // stop the process, so we need to query that as we go. 4316 4317 // One other complication here, is that we try to catch any case where the target has run (except for expressions) 4318 // and immediately exit, but if we get that wrong (which is possible) then the thread list might have changed, and 4319 // that would cause our iteration here to crash. We could make a copy of the thread list, but we'd really like 4320 // 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 4321 // against this list & bag out if anything differs. 4322 std::vector<uint32_t> thread_index_array(num_threads); 4323 for (idx = 0; idx < num_threads; ++idx) 4324 thread_index_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetIndexID(); 4325 4326 // Use this to track whether we should continue from here. We will only continue the target running if 4327 // no thread says we should stop. Of course if some thread's PerformAction actually sets the target running, 4328 // then it doesn't matter what the other threads say... 4329 4330 bool still_should_stop = false; 4331 4332 // Sometimes - for instance if we have a bug in the stub we are talking to, we stop but no thread has a 4333 // valid stop reason. In that case we should just stop, because we have no way of telling what the right 4334 // thing to do is, and it's better to let the user decide than continue behind their backs. 4335 4336 bool does_anybody_have_an_opinion = false; 4337 4338 for (idx = 0; idx < num_threads; ++idx) 4339 { 4340 curr_thread_list = m_process_sp->GetThreadList(); 4341 if (curr_thread_list.GetSize() != num_threads) 4342 { 4343 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4344 if (log) 4345 log->Printf("Number of threads changed from %u to %u while processing event.", num_threads, curr_thread_list.GetSize()); 4346 break; 4347 } 4348 4349 lldb::ThreadSP thread_sp = curr_thread_list.GetThreadAtIndex(idx); 4350 4351 if (thread_sp->GetIndexID() != thread_index_array[idx]) 4352 { 4353 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 4354 if (log) 4355 log->Printf("The thread at position %u changed from %u to %u while processing event.", 4356 idx, 4357 thread_index_array[idx], 4358 thread_sp->GetIndexID()); 4359 break; 4360 } 4361 4362 StopInfoSP stop_info_sp = thread_sp->GetStopInfo (); 4363 if (stop_info_sp && stop_info_sp->IsValid()) 4364 { 4365 does_anybody_have_an_opinion = true; 4366 bool this_thread_wants_to_stop; 4367 if (stop_info_sp->GetOverrideShouldStop()) 4368 { 4369 this_thread_wants_to_stop = stop_info_sp->GetOverriddenShouldStopValue(); 4370 } 4371 else 4372 { 4373 stop_info_sp->PerformAction(event_ptr); 4374 // The stop action might restart the target. If it does, then we want to mark that in the 4375 // event so that whoever is receiving it will know to wait for the running event and reflect 4376 // that state appropriately. 4377 // We also need to stop processing actions, since they aren't expecting the target to be running. 4378 4379 // FIXME: we might have run. 4380 if (stop_info_sp->HasTargetRunSinceMe()) 4381 { 4382 SetRestarted (true); 4383 break; 4384 } 4385 4386 this_thread_wants_to_stop = stop_info_sp->ShouldStop(event_ptr); 4387 } 4388 4389 if (still_should_stop == false) 4390 still_should_stop = this_thread_wants_to_stop; 4391 } 4392 } 4393 4394 4395 if (!GetRestarted()) 4396 { 4397 if (!still_should_stop && does_anybody_have_an_opinion) 4398 { 4399 // We've been asked to continue, so do that here. 4400 SetRestarted(true); 4401 // Use the public resume method here, since this is just 4402 // extending a public resume. 4403 m_process_sp->PrivateResume(); 4404 } 4405 else 4406 { 4407 // If we didn't restart, run the Stop Hooks here: 4408 // They might also restart the target, so watch for that. 4409 m_process_sp->GetTarget().RunStopHooks(); 4410 if (m_process_sp->GetPrivateState() == eStateRunning) 4411 SetRestarted(true); 4412 } 4413 } 4414 } 4415} 4416 4417void 4418Process::ProcessEventData::Dump (Stream *s) const 4419{ 4420 if (m_process_sp) 4421 s->Printf(" process = %p (pid = %" PRIu64 "), ", m_process_sp.get(), m_process_sp->GetID()); 4422 4423 s->Printf("state = %s", StateAsCString(GetState())); 4424} 4425 4426const Process::ProcessEventData * 4427Process::ProcessEventData::GetEventDataFromEvent (const Event *event_ptr) 4428{ 4429 if (event_ptr) 4430 { 4431 const EventData *event_data = event_ptr->GetData(); 4432 if (event_data && event_data->GetFlavor() == ProcessEventData::GetFlavorString()) 4433 return static_cast <const ProcessEventData *> (event_ptr->GetData()); 4434 } 4435 return NULL; 4436} 4437 4438ProcessSP 4439Process::ProcessEventData::GetProcessFromEvent (const Event *event_ptr) 4440{ 4441 ProcessSP process_sp; 4442 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4443 if (data) 4444 process_sp = data->GetProcessSP(); 4445 return process_sp; 4446} 4447 4448StateType 4449Process::ProcessEventData::GetStateFromEvent (const Event *event_ptr) 4450{ 4451 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4452 if (data == NULL) 4453 return eStateInvalid; 4454 else 4455 return data->GetState(); 4456} 4457 4458bool 4459Process::ProcessEventData::GetRestartedFromEvent (const Event *event_ptr) 4460{ 4461 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4462 if (data == NULL) 4463 return false; 4464 else 4465 return data->GetRestarted(); 4466} 4467 4468void 4469Process::ProcessEventData::SetRestartedInEvent (Event *event_ptr, bool new_value) 4470{ 4471 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4472 if (data != NULL) 4473 data->SetRestarted(new_value); 4474} 4475 4476size_t 4477Process::ProcessEventData::GetNumRestartedReasons(const Event *event_ptr) 4478{ 4479 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4480 if (data != NULL) 4481 return data->GetNumRestartedReasons(); 4482 else 4483 return 0; 4484} 4485 4486const char * 4487Process::ProcessEventData::GetRestartedReasonAtIndex(const Event *event_ptr, size_t idx) 4488{ 4489 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4490 if (data != NULL) 4491 return data->GetRestartedReasonAtIndex(idx); 4492 else 4493 return NULL; 4494} 4495 4496void 4497Process::ProcessEventData::AddRestartedReason (Event *event_ptr, const char *reason) 4498{ 4499 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4500 if (data != NULL) 4501 data->AddRestartedReason(reason); 4502} 4503 4504bool 4505Process::ProcessEventData::GetInterruptedFromEvent (const Event *event_ptr) 4506{ 4507 const ProcessEventData *data = GetEventDataFromEvent (event_ptr); 4508 if (data == NULL) 4509 return false; 4510 else 4511 return data->GetInterrupted (); 4512} 4513 4514void 4515Process::ProcessEventData::SetInterruptedInEvent (Event *event_ptr, bool new_value) 4516{ 4517 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4518 if (data != NULL) 4519 data->SetInterrupted(new_value); 4520} 4521 4522bool 4523Process::ProcessEventData::SetUpdateStateOnRemoval (Event *event_ptr) 4524{ 4525 ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr)); 4526 if (data) 4527 { 4528 data->SetUpdateStateOnRemoval(); 4529 return true; 4530 } 4531 return false; 4532} 4533 4534lldb::TargetSP 4535Process::CalculateTarget () 4536{ 4537 return m_target.shared_from_this(); 4538} 4539 4540void 4541Process::CalculateExecutionContext (ExecutionContext &exe_ctx) 4542{ 4543 exe_ctx.SetTargetPtr (&m_target); 4544 exe_ctx.SetProcessPtr (this); 4545 exe_ctx.SetThreadPtr(NULL); 4546 exe_ctx.SetFramePtr (NULL); 4547} 4548 4549//uint32_t 4550//Process::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 4551//{ 4552// return 0; 4553//} 4554// 4555//ArchSpec 4556//Process::GetArchSpecForExistingProcess (lldb::pid_t pid) 4557//{ 4558// return Host::GetArchSpecForExistingProcess (pid); 4559//} 4560// 4561//ArchSpec 4562//Process::GetArchSpecForExistingProcess (const char *process_name) 4563//{ 4564// return Host::GetArchSpecForExistingProcess (process_name); 4565//} 4566// 4567void 4568Process::AppendSTDOUT (const char * s, size_t len) 4569{ 4570 Mutex::Locker locker (m_stdio_communication_mutex); 4571 m_stdout_data.append (s, len); 4572 BroadcastEventIfUnique (eBroadcastBitSTDOUT, new ProcessEventData (shared_from_this(), GetState())); 4573} 4574 4575void 4576Process::AppendSTDERR (const char * s, size_t len) 4577{ 4578 Mutex::Locker locker (m_stdio_communication_mutex); 4579 m_stderr_data.append (s, len); 4580 BroadcastEventIfUnique (eBroadcastBitSTDERR, new ProcessEventData (shared_from_this(), GetState())); 4581} 4582 4583void 4584Process::BroadcastAsyncProfileData(const std::string &one_profile_data) 4585{ 4586 Mutex::Locker locker (m_profile_data_comm_mutex); 4587 m_profile_data.push_back(one_profile_data); 4588 BroadcastEventIfUnique (eBroadcastBitProfileData, new ProcessEventData (shared_from_this(), GetState())); 4589} 4590 4591size_t 4592Process::GetAsyncProfileData (char *buf, size_t buf_size, Error &error) 4593{ 4594 Mutex::Locker locker(m_profile_data_comm_mutex); 4595 if (m_profile_data.empty()) 4596 return 0; 4597 4598 std::string &one_profile_data = m_profile_data.front(); 4599 size_t bytes_available = one_profile_data.size(); 4600 if (bytes_available > 0) 4601 { 4602 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4603 if (log) 4604 log->Printf ("Process::GetProfileData (buf = %p, size = %" PRIu64 ")", buf, (uint64_t)buf_size); 4605 if (bytes_available > buf_size) 4606 { 4607 memcpy(buf, one_profile_data.c_str(), buf_size); 4608 one_profile_data.erase(0, buf_size); 4609 bytes_available = buf_size; 4610 } 4611 else 4612 { 4613 memcpy(buf, one_profile_data.c_str(), bytes_available); 4614 m_profile_data.erase(m_profile_data.begin()); 4615 } 4616 } 4617 return bytes_available; 4618} 4619 4620 4621//------------------------------------------------------------------ 4622// Process STDIO 4623//------------------------------------------------------------------ 4624 4625size_t 4626Process::GetSTDOUT (char *buf, size_t buf_size, Error &error) 4627{ 4628 Mutex::Locker locker(m_stdio_communication_mutex); 4629 size_t bytes_available = m_stdout_data.size(); 4630 if (bytes_available > 0) 4631 { 4632 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4633 if (log) 4634 log->Printf ("Process::GetSTDOUT (buf = %p, size = %" PRIu64 ")", buf, (uint64_t)buf_size); 4635 if (bytes_available > buf_size) 4636 { 4637 memcpy(buf, m_stdout_data.c_str(), buf_size); 4638 m_stdout_data.erase(0, buf_size); 4639 bytes_available = buf_size; 4640 } 4641 else 4642 { 4643 memcpy(buf, m_stdout_data.c_str(), bytes_available); 4644 m_stdout_data.clear(); 4645 } 4646 } 4647 return bytes_available; 4648} 4649 4650 4651size_t 4652Process::GetSTDERR (char *buf, size_t buf_size, Error &error) 4653{ 4654 Mutex::Locker locker(m_stdio_communication_mutex); 4655 size_t bytes_available = m_stderr_data.size(); 4656 if (bytes_available > 0) 4657 { 4658 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 4659 if (log) 4660 log->Printf ("Process::GetSTDERR (buf = %p, size = %" PRIu64 ")", buf, (uint64_t)buf_size); 4661 if (bytes_available > buf_size) 4662 { 4663 memcpy(buf, m_stderr_data.c_str(), buf_size); 4664 m_stderr_data.erase(0, buf_size); 4665 bytes_available = buf_size; 4666 } 4667 else 4668 { 4669 memcpy(buf, m_stderr_data.c_str(), bytes_available); 4670 m_stderr_data.clear(); 4671 } 4672 } 4673 return bytes_available; 4674} 4675 4676void 4677Process::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len) 4678{ 4679 Process *process = (Process *) baton; 4680 process->AppendSTDOUT (static_cast<const char *>(src), src_len); 4681} 4682 4683void 4684Process::ResetProcessIOHandler () 4685{ 4686 m_process_input_reader.reset(); 4687} 4688 4689 4690class IOHandlerProcessSTDIO : 4691 public IOHandler 4692{ 4693public: 4694 IOHandlerProcessSTDIO (Process *process, 4695 int write_fd) : 4696 IOHandler(process->GetTarget().GetDebugger()), 4697 m_process (process), 4698 m_read_file (), 4699 m_write_file (write_fd, false), 4700 m_pipe_read(), 4701 m_pipe_write() 4702 { 4703 m_read_file.SetDescriptor(GetInputFD(), false); 4704 } 4705 4706 virtual 4707 ~IOHandlerProcessSTDIO () 4708 { 4709 4710 } 4711 4712 bool 4713 OpenPipes () 4714 { 4715 if (m_pipe_read.IsValid() && m_pipe_write.IsValid()) 4716 return true; 4717 4718 int fds[2]; 4719#ifdef _MSC_VER 4720 // pipe is not supported on windows so default to a fail condition 4721 int err = 1; 4722#else 4723 int err = pipe(fds); 4724#endif 4725 if (err == 0) 4726 { 4727 m_pipe_read.SetDescriptor(fds[0], true); 4728 m_pipe_write.SetDescriptor(fds[1], true); 4729 return true; 4730 } 4731 return false; 4732 } 4733 4734 void 4735 ClosePipes() 4736 { 4737 m_pipe_read.Close(); 4738 m_pipe_write.Close(); 4739 } 4740 4741 // Each IOHandler gets to run until it is done. It should read data 4742 // from the "in" and place output into "out" and "err and return 4743 // when done. 4744 virtual void 4745 Run () 4746 { 4747 if (m_read_file.IsValid() && m_write_file.IsValid()) 4748 { 4749 SetIsDone(false); 4750 if (OpenPipes()) 4751 { 4752 const int read_fd = m_read_file.GetDescriptor(); 4753 const int pipe_read_fd = m_pipe_read.GetDescriptor(); 4754 TerminalState terminal_state; 4755 terminal_state.Save (read_fd, false); 4756 Terminal terminal(read_fd); 4757 terminal.SetCanonical(false); 4758 terminal.SetEcho(false); 4759// FD_ZERO, FD_SET are not supported on windows 4760#ifndef _MSC_VER 4761 while (!GetIsDone()) 4762 { 4763 fd_set read_fdset; 4764 FD_ZERO (&read_fdset); 4765 FD_SET (read_fd, &read_fdset); 4766 FD_SET (pipe_read_fd, &read_fdset); 4767 const int nfds = std::max<int>(read_fd, pipe_read_fd) + 1; 4768 int num_set_fds = select (nfds, &read_fdset, NULL, NULL, NULL); 4769 if (num_set_fds < 0) 4770 { 4771 const int select_errno = errno; 4772 4773 if (select_errno != EINTR) 4774 SetIsDone(true); 4775 } 4776 else if (num_set_fds > 0) 4777 { 4778 char ch = 0; 4779 size_t n; 4780 if (FD_ISSET (read_fd, &read_fdset)) 4781 { 4782 n = 1; 4783 if (m_read_file.Read(&ch, n).Success() && n == 1) 4784 { 4785 if (m_write_file.Write(&ch, n).Fail() || n != 1) 4786 SetIsDone(true); 4787 } 4788 else 4789 SetIsDone(true); 4790 } 4791 if (FD_ISSET (pipe_read_fd, &read_fdset)) 4792 { 4793 // Consume the interrupt byte 4794 n = 1; 4795 m_pipe_read.Read (&ch, n); 4796 SetIsDone(true); 4797 } 4798 } 4799 } 4800#endif 4801 terminal_state.Restore(); 4802 4803 } 4804 else 4805 SetIsDone(true); 4806 } 4807 else 4808 SetIsDone(true); 4809 } 4810 4811 // Hide any characters that have been displayed so far so async 4812 // output can be displayed. Refresh() will be called after the 4813 // output has been displayed. 4814 virtual void 4815 Hide () 4816 { 4817 4818 } 4819 // Called when the async output has been received in order to update 4820 // the input reader (refresh the prompt and redisplay any current 4821 // line(s) that are being edited 4822 virtual void 4823 Refresh () 4824 { 4825 4826 } 4827 4828 virtual void 4829 Cancel () 4830 { 4831 size_t n = 1; 4832 char ch = 'q'; 4833 m_pipe_write.Write (&ch, n); 4834 } 4835 4836 virtual void 4837 Interrupt () 4838 { 4839 if (StateIsRunningState(m_process->GetState())) 4840 m_process->SendAsyncInterrupt(); 4841 } 4842 4843 virtual void 4844 GotEOF() 4845 { 4846 4847 } 4848 4849protected: 4850 Process *m_process; 4851 File m_read_file; // Read from this file (usually actual STDIN for LLDB 4852 File m_write_file; // Write to this file (usually the master pty for getting io to debuggee) 4853 File m_pipe_read; 4854 File m_pipe_write; 4855 4856}; 4857 4858void 4859Process::WatchForSTDIN (IOHandler &io_handler) 4860{ 4861} 4862 4863void 4864Process::CancelWatchForSTDIN (bool exited) 4865{ 4866 if (m_process_input_reader) 4867 { 4868 if (exited) 4869 m_process_input_reader->SetIsDone(true); 4870 m_process_input_reader->Cancel(); 4871 } 4872} 4873 4874void 4875Process::SetSTDIOFileDescriptor (int fd) 4876{ 4877 // First set up the Read Thread for reading/handling process I/O 4878 4879 std::unique_ptr<ConnectionFileDescriptor> conn_ap (new ConnectionFileDescriptor (fd, true)); 4880 4881 if (conn_ap.get()) 4882 { 4883 m_stdio_communication.SetConnection (conn_ap.release()); 4884 if (m_stdio_communication.IsConnected()) 4885 { 4886 m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this); 4887 m_stdio_communication.StartReadThread(); 4888 4889 // Now read thread is set up, set up input reader. 4890 4891 if (!m_process_input_reader.get()) 4892 m_process_input_reader.reset (new IOHandlerProcessSTDIO (this, fd)); 4893 } 4894 } 4895} 4896 4897void 4898Process::PushProcessIOHandler () 4899{ 4900 IOHandlerSP io_handler_sp (m_process_input_reader); 4901 if (io_handler_sp) 4902 { 4903 io_handler_sp->SetIsDone(false); 4904 m_target.GetDebugger().PushIOHandler (io_handler_sp); 4905 } 4906} 4907 4908void 4909Process::PopProcessIOHandler () 4910{ 4911 IOHandlerSP io_handler_sp (m_process_input_reader); 4912 if (io_handler_sp) 4913 { 4914 io_handler_sp->Cancel(); 4915 m_target.GetDebugger().PopIOHandler (io_handler_sp); 4916 } 4917} 4918 4919// The process needs to know about installed plug-ins 4920void 4921Process::SettingsInitialize () 4922{ 4923 Thread::SettingsInitialize (); 4924} 4925 4926void 4927Process::SettingsTerminate () 4928{ 4929 Thread::SettingsTerminate (); 4930} 4931 4932ExecutionResults 4933Process::RunThreadPlan (ExecutionContext &exe_ctx, 4934 lldb::ThreadPlanSP &thread_plan_sp, 4935 const EvaluateExpressionOptions &options, 4936 Stream &errors) 4937{ 4938 ExecutionResults return_value = eExecutionSetupError; 4939 4940 if (thread_plan_sp.get() == NULL) 4941 { 4942 errors.Printf("RunThreadPlan called with empty thread plan."); 4943 return eExecutionSetupError; 4944 } 4945 4946 if (!thread_plan_sp->ValidatePlan(NULL)) 4947 { 4948 errors.Printf ("RunThreadPlan called with an invalid thread plan."); 4949 return eExecutionSetupError; 4950 } 4951 4952 if (exe_ctx.GetProcessPtr() != this) 4953 { 4954 errors.Printf("RunThreadPlan called on wrong process."); 4955 return eExecutionSetupError; 4956 } 4957 4958 Thread *thread = exe_ctx.GetThreadPtr(); 4959 if (thread == NULL) 4960 { 4961 errors.Printf("RunThreadPlan called with invalid thread."); 4962 return eExecutionSetupError; 4963 } 4964 4965 // We rely on the thread plan we are running returning "PlanCompleted" if when it successfully completes. 4966 // For that to be true the plan can't be private - since private plans suppress themselves in the 4967 // GetCompletedPlan call. 4968 4969 bool orig_plan_private = thread_plan_sp->GetPrivate(); 4970 thread_plan_sp->SetPrivate(false); 4971 4972 if (m_private_state.GetValue() != eStateStopped) 4973 { 4974 errors.Printf ("RunThreadPlan called while the private state was not stopped."); 4975 return eExecutionSetupError; 4976 } 4977 4978 // Save the thread & frame from the exe_ctx for restoration after we run 4979 const uint32_t thread_idx_id = thread->GetIndexID(); 4980 StackFrameSP selected_frame_sp = thread->GetSelectedFrame(); 4981 if (!selected_frame_sp) 4982 { 4983 thread->SetSelectedFrame(0); 4984 selected_frame_sp = thread->GetSelectedFrame(); 4985 if (!selected_frame_sp) 4986 { 4987 errors.Printf("RunThreadPlan called without a selected frame on thread %d", thread_idx_id); 4988 return eExecutionSetupError; 4989 } 4990 } 4991 4992 StackID ctx_frame_id = selected_frame_sp->GetStackID(); 4993 4994 // N.B. Running the target may unset the currently selected thread and frame. We don't want to do that either, 4995 // so we should arrange to reset them as well. 4996 4997 lldb::ThreadSP selected_thread_sp = GetThreadList().GetSelectedThread(); 4998 4999 uint32_t selected_tid; 5000 StackID selected_stack_id; 5001 if (selected_thread_sp) 5002 { 5003 selected_tid = selected_thread_sp->GetIndexID(); 5004 selected_stack_id = selected_thread_sp->GetSelectedFrame()->GetStackID(); 5005 } 5006 else 5007 { 5008 selected_tid = LLDB_INVALID_THREAD_ID; 5009 } 5010 5011 lldb::thread_t backup_private_state_thread = LLDB_INVALID_HOST_THREAD; 5012 lldb::StateType old_state; 5013 lldb::ThreadPlanSP stopper_base_plan_sp; 5014 5015 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP | LIBLLDB_LOG_PROCESS)); 5016 if (Host::GetCurrentThread() == m_private_state_thread) 5017 { 5018 // Yikes, we are running on the private state thread! So we can't wait for public events on this thread, since 5019 // we are the thread that is generating public events. 5020 // The simplest thing to do is to spin up a temporary thread to handle private state thread events while 5021 // we are fielding public events here. 5022 if (log) 5023 log->Printf ("Running thread plan on private state thread, spinning up another state thread to handle the events."); 5024 5025 5026 backup_private_state_thread = m_private_state_thread; 5027 5028 // One other bit of business: we want to run just this thread plan and anything it pushes, and then stop, 5029 // returning control here. 5030 // But in the normal course of things, the plan above us on the stack would be given a shot at the stop 5031 // event before deciding to stop, and we don't want that. So we insert a "stopper" base plan on the stack 5032 // before the plan we want to run. Since base plans always stop and return control to the user, that will 5033 // do just what we want. 5034 stopper_base_plan_sp.reset(new ThreadPlanBase (*thread)); 5035 thread->QueueThreadPlan (stopper_base_plan_sp, false); 5036 // Have to make sure our public state is stopped, since otherwise the reporting logic below doesn't work correctly. 5037 old_state = m_public_state.GetValue(); 5038 m_public_state.SetValueNoLock(eStateStopped); 5039 5040 // Now spin up the private state thread: 5041 StartPrivateStateThread(true); 5042 } 5043 5044 thread->QueueThreadPlan(thread_plan_sp, false); // This used to pass "true" does that make sense? 5045 5046 if (options.GetDebug()) 5047 { 5048 // In this case, we aren't actually going to run, we just want to stop right away. 5049 // Flush this thread so we will refetch the stacks and show the correct backtrace. 5050 // FIXME: To make this prettier we should invent some stop reason for this, but that 5051 // is only cosmetic, and this functionality is only of use to lldb developers who can 5052 // live with not pretty... 5053 thread->Flush(); 5054 return eExecutionStoppedForDebug; 5055 } 5056 5057 Listener listener("lldb.process.listener.run-thread-plan"); 5058 5059 lldb::EventSP event_to_broadcast_sp; 5060 5061 { 5062 // This process event hijacker Hijacks the Public events and its destructor makes sure that the process events get 5063 // restored on exit to the function. 5064 // 5065 // If the event needs to propagate beyond the hijacker (e.g., the process exits during execution), then the event 5066 // is put into event_to_broadcast_sp for rebroadcasting. 5067 5068 ProcessEventHijacker run_thread_plan_hijacker (*this, &listener); 5069 5070 if (log) 5071 { 5072 StreamString s; 5073 thread_plan_sp->GetDescription(&s, lldb::eDescriptionLevelVerbose); 5074 log->Printf ("Process::RunThreadPlan(): Resuming thread %u - 0x%4.4" PRIx64 " to run thread plan \"%s\".", 5075 thread->GetIndexID(), 5076 thread->GetID(), 5077 s.GetData()); 5078 } 5079 5080 bool got_event; 5081 lldb::EventSP event_sp; 5082 lldb::StateType stop_state = lldb::eStateInvalid; 5083 5084 TimeValue* timeout_ptr = NULL; 5085 TimeValue real_timeout; 5086 5087 bool before_first_timeout = true; // This is set to false the first time that we have to halt the target. 5088 bool do_resume = true; 5089 bool handle_running_event = true; 5090 const uint64_t default_one_thread_timeout_usec = 250000; 5091 5092 // This is just for accounting: 5093 uint32_t num_resumes = 0; 5094 5095 TimeValue one_thread_timeout = TimeValue::Now(); 5096 TimeValue final_timeout = one_thread_timeout; 5097 5098 uint32_t timeout_usec = options.GetTimeoutUsec(); 5099 if (options.GetTryAllThreads()) 5100 { 5101 // If we are running all threads then we take half the time to run all threads, bounded by 5102 // .25 sec. 5103 if (options.GetTimeoutUsec() == 0) 5104 one_thread_timeout.OffsetWithMicroSeconds(default_one_thread_timeout_usec); 5105 else 5106 { 5107 uint64_t computed_timeout = timeout_usec / 2; 5108 if (computed_timeout > default_one_thread_timeout_usec) 5109 computed_timeout = default_one_thread_timeout_usec; 5110 one_thread_timeout.OffsetWithMicroSeconds(computed_timeout); 5111 } 5112 final_timeout.OffsetWithMicroSeconds (timeout_usec); 5113 } 5114 else 5115 { 5116 if (timeout_usec != 0) 5117 final_timeout.OffsetWithMicroSeconds(timeout_usec); 5118 } 5119 5120 // This isn't going to work if there are unfetched events on the queue. 5121 // Are there cases where we might want to run the remaining events here, and then try to 5122 // call the function? That's probably being too tricky for our own good. 5123 5124 Event *other_events = listener.PeekAtNextEvent(); 5125 if (other_events != NULL) 5126 { 5127 errors.Printf("Calling RunThreadPlan with pending events on the queue."); 5128 return eExecutionSetupError; 5129 } 5130 5131 // We also need to make sure that the next event is delivered. We might be calling a function as part of 5132 // a thread plan, in which case the last delivered event could be the running event, and we don't want 5133 // event coalescing to cause us to lose OUR running event... 5134 ForceNextEventDelivery(); 5135 5136 // This while loop must exit out the bottom, there's cleanup that we need to do when we are done. 5137 // So don't call return anywhere within it. 5138 5139 while (1) 5140 { 5141 // We usually want to resume the process if we get to the top of the loop. 5142 // The only exception is if we get two running events with no intervening 5143 // stop, which can happen, we will just wait for then next stop event. 5144 if (log) 5145 log->Printf ("Top of while loop: do_resume: %i handle_running_event: %i before_first_timeout: %i.", 5146 do_resume, 5147 handle_running_event, 5148 before_first_timeout); 5149 5150 if (do_resume || handle_running_event) 5151 { 5152 // Do the initial resume and wait for the running event before going further. 5153 5154 if (do_resume) 5155 { 5156 num_resumes++; 5157 Error resume_error = PrivateResume (); 5158 if (!resume_error.Success()) 5159 { 5160 errors.Printf("Error resuming inferior the %d time: \"%s\".\n", 5161 num_resumes, 5162 resume_error.AsCString()); 5163 return_value = eExecutionSetupError; 5164 break; 5165 } 5166 } 5167 5168 TimeValue resume_timeout = TimeValue::Now(); 5169 resume_timeout.OffsetWithMicroSeconds(500000); 5170 5171 got_event = listener.WaitForEvent(&resume_timeout, event_sp); 5172 if (!got_event) 5173 { 5174 if (log) 5175 log->Printf ("Process::RunThreadPlan(): didn't get any event after resume %d, exiting.", 5176 num_resumes); 5177 5178 errors.Printf("Didn't get any event after resume %d, exiting.", num_resumes); 5179 return_value = eExecutionSetupError; 5180 break; 5181 } 5182 5183 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5184 5185 if (stop_state != eStateRunning) 5186 { 5187 bool restarted = false; 5188 5189 if (stop_state == eStateStopped) 5190 { 5191 restarted = Process::ProcessEventData::GetRestartedFromEvent(event_sp.get()); 5192 if (log) 5193 log->Printf("Process::RunThreadPlan(): didn't get running event after " 5194 "resume %d, got %s instead (restarted: %i, do_resume: %i, handle_running_event: %i).", 5195 num_resumes, 5196 StateAsCString(stop_state), 5197 restarted, 5198 do_resume, 5199 handle_running_event); 5200 } 5201 5202 if (restarted) 5203 { 5204 // This is probably an overabundance of caution, I don't think I should ever get a stopped & restarted 5205 // event here. But if I do, the best thing is to Halt and then get out of here. 5206 Halt(); 5207 } 5208 5209 errors.Printf("Didn't get running event after initial resume, got %s instead.", 5210 StateAsCString(stop_state)); 5211 return_value = eExecutionSetupError; 5212 break; 5213 } 5214 5215 if (log) 5216 log->PutCString ("Process::RunThreadPlan(): resuming succeeded."); 5217 // We need to call the function synchronously, so spin waiting for it to return. 5218 // If we get interrupted while executing, we're going to lose our context, and 5219 // won't be able to gather the result at this point. 5220 // We set the timeout AFTER the resume, since the resume takes some time and we 5221 // don't want to charge that to the timeout. 5222 } 5223 else 5224 { 5225 if (log) 5226 log->PutCString ("Process::RunThreadPlan(): waiting for next event."); 5227 } 5228 5229 if (before_first_timeout) 5230 { 5231 if (options.GetTryAllThreads()) 5232 timeout_ptr = &one_thread_timeout; 5233 else 5234 { 5235 if (timeout_usec == 0) 5236 timeout_ptr = NULL; 5237 else 5238 timeout_ptr = &final_timeout; 5239 } 5240 } 5241 else 5242 { 5243 if (timeout_usec == 0) 5244 timeout_ptr = NULL; 5245 else 5246 timeout_ptr = &final_timeout; 5247 } 5248 5249 do_resume = true; 5250 handle_running_event = true; 5251 5252 // Now wait for the process to stop again: 5253 event_sp.reset(); 5254 5255 if (log) 5256 { 5257 if (timeout_ptr) 5258 { 5259 log->Printf ("Process::RunThreadPlan(): about to wait - now is %" PRIu64 " - endpoint is %" PRIu64, 5260 TimeValue::Now().GetAsMicroSecondsSinceJan1_1970(), 5261 timeout_ptr->GetAsMicroSecondsSinceJan1_1970()); 5262 } 5263 else 5264 { 5265 log->Printf ("Process::RunThreadPlan(): about to wait forever."); 5266 } 5267 } 5268 5269 got_event = listener.WaitForEvent (timeout_ptr, event_sp); 5270 5271 if (got_event) 5272 { 5273 if (event_sp.get()) 5274 { 5275 bool keep_going = false; 5276 if (event_sp->GetType() == eBroadcastBitInterrupt) 5277 { 5278 Halt(); 5279 return_value = eExecutionInterrupted; 5280 errors.Printf ("Execution halted by user interrupt."); 5281 if (log) 5282 log->Printf ("Process::RunThreadPlan(): Got interrupted by eBroadcastBitInterrupted, exiting."); 5283 break; 5284 } 5285 else 5286 { 5287 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5288 if (log) 5289 log->Printf("Process::RunThreadPlan(): in while loop, got event: %s.", StateAsCString(stop_state)); 5290 5291 switch (stop_state) 5292 { 5293 case lldb::eStateStopped: 5294 { 5295 // We stopped, figure out what we are going to do now. 5296 ThreadSP thread_sp = GetThreadList().FindThreadByIndexID (thread_idx_id); 5297 if (!thread_sp) 5298 { 5299 // Ooh, our thread has vanished. Unlikely that this was successful execution... 5300 if (log) 5301 log->Printf ("Process::RunThreadPlan(): execution completed but our thread (index-id=%u) has vanished.", thread_idx_id); 5302 return_value = eExecutionInterrupted; 5303 } 5304 else 5305 { 5306 // If we were restarted, we just need to go back up to fetch another event. 5307 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5308 { 5309 if (log) 5310 { 5311 log->Printf ("Process::RunThreadPlan(): Got a stop and restart, so we'll continue waiting."); 5312 } 5313 keep_going = true; 5314 do_resume = false; 5315 handle_running_event = true; 5316 5317 } 5318 else 5319 { 5320 5321 StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 5322 StopReason stop_reason = eStopReasonInvalid; 5323 if (stop_info_sp) 5324 stop_reason = stop_info_sp->GetStopReason(); 5325 5326 5327 // FIXME: We only check if the stop reason is plan complete, should we make sure that 5328 // it is OUR plan that is complete? 5329 if (stop_reason == eStopReasonPlanComplete) 5330 { 5331 if (log) 5332 log->PutCString ("Process::RunThreadPlan(): execution completed successfully."); 5333 // Now mark this plan as private so it doesn't get reported as the stop reason 5334 // after this point. 5335 if (thread_plan_sp) 5336 thread_plan_sp->SetPrivate (orig_plan_private); 5337 return_value = eExecutionCompleted; 5338 } 5339 else 5340 { 5341 // Something restarted the target, so just wait for it to stop for real. 5342 if (stop_reason == eStopReasonBreakpoint) 5343 { 5344 if (log) 5345 log->Printf ("Process::RunThreadPlan() stopped for breakpoint: %s.", stop_info_sp->GetDescription()); 5346 return_value = eExecutionHitBreakpoint; 5347 if (!options.DoesIgnoreBreakpoints()) 5348 { 5349 event_to_broadcast_sp = event_sp; 5350 } 5351 } 5352 else 5353 { 5354 if (log) 5355 log->PutCString ("Process::RunThreadPlan(): thread plan didn't successfully complete."); 5356 if (!options.DoesUnwindOnError()) 5357 event_to_broadcast_sp = event_sp; 5358 return_value = eExecutionInterrupted; 5359 } 5360 } 5361 } 5362 } 5363 } 5364 break; 5365 5366 case lldb::eStateRunning: 5367 // This shouldn't really happen, but sometimes we do get two running events without an 5368 // intervening stop, and in that case we should just go back to waiting for the stop. 5369 do_resume = false; 5370 keep_going = true; 5371 handle_running_event = false; 5372 break; 5373 5374 default: 5375 if (log) 5376 log->Printf("Process::RunThreadPlan(): execution stopped with unexpected state: %s.", StateAsCString(stop_state)); 5377 5378 if (stop_state == eStateExited) 5379 event_to_broadcast_sp = event_sp; 5380 5381 errors.Printf ("Execution stopped with unexpected state.\n"); 5382 return_value = eExecutionInterrupted; 5383 break; 5384 } 5385 } 5386 5387 if (keep_going) 5388 continue; 5389 else 5390 break; 5391 } 5392 else 5393 { 5394 if (log) 5395 log->PutCString ("Process::RunThreadPlan(): got_event was true, but the event pointer was null. How odd..."); 5396 return_value = eExecutionInterrupted; 5397 break; 5398 } 5399 } 5400 else 5401 { 5402 // If we didn't get an event that means we've timed out... 5403 // We will interrupt the process here. Depending on what we were asked to do we will 5404 // either exit, or try with all threads running for the same timeout. 5405 5406 if (log) { 5407 if (options.GetTryAllThreads()) 5408 { 5409 uint64_t remaining_time = final_timeout - TimeValue::Now(); 5410 if (before_first_timeout) 5411 log->Printf ("Process::RunThreadPlan(): Running function with one thread timeout timed out, " 5412 "running till for %" PRIu64 " usec with all threads enabled.", 5413 remaining_time); 5414 else 5415 log->Printf ("Process::RunThreadPlan(): Restarting function with all threads enabled " 5416 "and timeout: %u timed out, abandoning execution.", 5417 timeout_usec); 5418 } 5419 else 5420 log->Printf ("Process::RunThreadPlan(): Running function with timeout: %u timed out, " 5421 "abandoning execution.", 5422 timeout_usec); 5423 } 5424 5425 // It is possible that between the time we issued the Halt, and we get around to calling Halt the target 5426 // could have stopped. That's fine, Halt will figure that out and send the appropriate Stopped event. 5427 // BUT it is also possible that we stopped & restarted (e.g. hit a signal with "stop" set to false.) In 5428 // that case, we'll get the stopped & restarted event, and we should go back to waiting for the Halt's 5429 // stopped event. That's what this while loop does. 5430 5431 bool back_to_top = true; 5432 uint32_t try_halt_again = 0; 5433 bool do_halt = true; 5434 const uint32_t num_retries = 5; 5435 while (try_halt_again < num_retries) 5436 { 5437 Error halt_error; 5438 if (do_halt) 5439 { 5440 if (log) 5441 log->Printf ("Process::RunThreadPlan(): Running Halt."); 5442 halt_error = Halt(); 5443 } 5444 if (halt_error.Success()) 5445 { 5446 if (log) 5447 log->PutCString ("Process::RunThreadPlan(): Halt succeeded."); 5448 5449 real_timeout = TimeValue::Now(); 5450 real_timeout.OffsetWithMicroSeconds(500000); 5451 5452 got_event = listener.WaitForEvent(&real_timeout, event_sp); 5453 5454 if (got_event) 5455 { 5456 stop_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get()); 5457 if (log) 5458 { 5459 log->Printf ("Process::RunThreadPlan(): Stopped with event: %s", StateAsCString(stop_state)); 5460 if (stop_state == lldb::eStateStopped 5461 && Process::ProcessEventData::GetInterruptedFromEvent(event_sp.get())) 5462 log->PutCString (" Event was the Halt interruption event."); 5463 } 5464 5465 if (stop_state == lldb::eStateStopped) 5466 { 5467 // Between the time we initiated the Halt and the time we delivered it, the process could have 5468 // already finished its job. Check that here: 5469 5470 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 5471 { 5472 if (log) 5473 log->PutCString ("Process::RunThreadPlan(): Even though we timed out, the call plan was done. " 5474 "Exiting wait loop."); 5475 return_value = eExecutionCompleted; 5476 back_to_top = false; 5477 break; 5478 } 5479 5480 if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) 5481 { 5482 if (log) 5483 log->PutCString ("Process::RunThreadPlan(): Went to halt but got a restarted event, there must be an un-restarted stopped event so try again... " 5484 "Exiting wait loop."); 5485 try_halt_again++; 5486 do_halt = false; 5487 continue; 5488 } 5489 5490 if (!options.GetTryAllThreads()) 5491 { 5492 if (log) 5493 log->PutCString ("Process::RunThreadPlan(): try_all_threads was false, we stopped so now we're quitting."); 5494 return_value = eExecutionInterrupted; 5495 back_to_top = false; 5496 break; 5497 } 5498 5499 if (before_first_timeout) 5500 { 5501 // Set all the other threads to run, and return to the top of the loop, which will continue; 5502 before_first_timeout = false; 5503 thread_plan_sp->SetStopOthers (false); 5504 if (log) 5505 log->PutCString ("Process::RunThreadPlan(): about to resume."); 5506 5507 back_to_top = true; 5508 break; 5509 } 5510 else 5511 { 5512 // Running all threads failed, so return Interrupted. 5513 if (log) 5514 log->PutCString("Process::RunThreadPlan(): running all threads timed out."); 5515 return_value = eExecutionInterrupted; 5516 back_to_top = false; 5517 break; 5518 } 5519 } 5520 } 5521 else 5522 { if (log) 5523 log->PutCString("Process::RunThreadPlan(): halt said it succeeded, but I got no event. " 5524 "I'm getting out of here passing Interrupted."); 5525 return_value = eExecutionInterrupted; 5526 back_to_top = false; 5527 break; 5528 } 5529 } 5530 else 5531 { 5532 try_halt_again++; 5533 continue; 5534 } 5535 } 5536 5537 if (!back_to_top || try_halt_again > num_retries) 5538 break; 5539 else 5540 continue; 5541 } 5542 } // END WAIT LOOP 5543 5544 // If we had to start up a temporary private state thread to run this thread plan, shut it down now. 5545 if (IS_VALID_LLDB_HOST_THREAD(backup_private_state_thread)) 5546 { 5547 StopPrivateStateThread(); 5548 Error error; 5549 m_private_state_thread = backup_private_state_thread; 5550 if (stopper_base_plan_sp) 5551 { 5552 thread->DiscardThreadPlansUpToPlan(stopper_base_plan_sp); 5553 } 5554 m_public_state.SetValueNoLock(old_state); 5555 5556 } 5557 5558 // Restore the thread state if we are going to discard the plan execution. There are three cases where this 5559 // could happen: 5560 // 1) The execution successfully completed 5561 // 2) We hit a breakpoint, and ignore_breakpoints was true 5562 // 3) We got some other error, and discard_on_error was true 5563 bool should_unwind = (return_value == eExecutionInterrupted && options.DoesUnwindOnError()) 5564 || (return_value == eExecutionHitBreakpoint && options.DoesIgnoreBreakpoints()); 5565 5566 if (return_value == eExecutionCompleted 5567 || should_unwind) 5568 { 5569 thread_plan_sp->RestoreThreadState(); 5570 } 5571 5572 // Now do some processing on the results of the run: 5573 if (return_value == eExecutionInterrupted || return_value == eExecutionHitBreakpoint) 5574 { 5575 if (log) 5576 { 5577 StreamString s; 5578 if (event_sp) 5579 event_sp->Dump (&s); 5580 else 5581 { 5582 log->PutCString ("Process::RunThreadPlan(): Stop event that interrupted us is NULL."); 5583 } 5584 5585 StreamString ts; 5586 5587 const char *event_explanation = NULL; 5588 5589 do 5590 { 5591 if (!event_sp) 5592 { 5593 event_explanation = "<no event>"; 5594 break; 5595 } 5596 else if (event_sp->GetType() == eBroadcastBitInterrupt) 5597 { 5598 event_explanation = "<user interrupt>"; 5599 break; 5600 } 5601 else 5602 { 5603 const Process::ProcessEventData *event_data = Process::ProcessEventData::GetEventDataFromEvent (event_sp.get()); 5604 5605 if (!event_data) 5606 { 5607 event_explanation = "<no event data>"; 5608 break; 5609 } 5610 5611 Process *process = event_data->GetProcessSP().get(); 5612 5613 if (!process) 5614 { 5615 event_explanation = "<no process>"; 5616 break; 5617 } 5618 5619 ThreadList &thread_list = process->GetThreadList(); 5620 5621 uint32_t num_threads = thread_list.GetSize(); 5622 uint32_t thread_index; 5623 5624 ts.Printf("<%u threads> ", num_threads); 5625 5626 for (thread_index = 0; 5627 thread_index < num_threads; 5628 ++thread_index) 5629 { 5630 Thread *thread = thread_list.GetThreadAtIndex(thread_index).get(); 5631 5632 if (!thread) 5633 { 5634 ts.Printf("<?> "); 5635 continue; 5636 } 5637 5638 ts.Printf("<0x%4.4" PRIx64 " ", thread->GetID()); 5639 RegisterContext *register_context = thread->GetRegisterContext().get(); 5640 5641 if (register_context) 5642 ts.Printf("[ip 0x%" PRIx64 "] ", register_context->GetPC()); 5643 else 5644 ts.Printf("[ip unknown] "); 5645 5646 lldb::StopInfoSP stop_info_sp = thread->GetStopInfo(); 5647 if (stop_info_sp) 5648 { 5649 const char *stop_desc = stop_info_sp->GetDescription(); 5650 if (stop_desc) 5651 ts.PutCString (stop_desc); 5652 } 5653 ts.Printf(">"); 5654 } 5655 5656 event_explanation = ts.GetData(); 5657 } 5658 } while (0); 5659 5660 if (event_explanation) 5661 log->Printf("Process::RunThreadPlan(): execution interrupted: %s %s", s.GetData(), event_explanation); 5662 else 5663 log->Printf("Process::RunThreadPlan(): execution interrupted: %s", s.GetData()); 5664 } 5665 5666 if (should_unwind) 5667 { 5668 if (log) 5669 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - discarding thread plans up to %p.", thread_plan_sp.get()); 5670 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 5671 thread_plan_sp->SetPrivate (orig_plan_private); 5672 } 5673 else 5674 { 5675 if (log) 5676 log->Printf ("Process::RunThreadPlan: ExecutionInterrupted - for plan: %p not discarding.", thread_plan_sp.get()); 5677 } 5678 } 5679 else if (return_value == eExecutionSetupError) 5680 { 5681 if (log) 5682 log->PutCString("Process::RunThreadPlan(): execution set up error."); 5683 5684 if (options.DoesUnwindOnError()) 5685 { 5686 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 5687 thread_plan_sp->SetPrivate (orig_plan_private); 5688 } 5689 } 5690 else 5691 { 5692 if (thread->IsThreadPlanDone (thread_plan_sp.get())) 5693 { 5694 if (log) 5695 log->PutCString("Process::RunThreadPlan(): thread plan is done"); 5696 return_value = eExecutionCompleted; 5697 } 5698 else if (thread->WasThreadPlanDiscarded (thread_plan_sp.get())) 5699 { 5700 if (log) 5701 log->PutCString("Process::RunThreadPlan(): thread plan was discarded"); 5702 return_value = eExecutionDiscarded; 5703 } 5704 else 5705 { 5706 if (log) 5707 log->PutCString("Process::RunThreadPlan(): thread plan stopped in mid course"); 5708 if (options.DoesUnwindOnError() && thread_plan_sp) 5709 { 5710 if (log) 5711 log->PutCString("Process::RunThreadPlan(): discarding thread plan 'cause unwind_on_error is set."); 5712 thread->DiscardThreadPlansUpToPlan (thread_plan_sp); 5713 thread_plan_sp->SetPrivate (orig_plan_private); 5714 } 5715 } 5716 } 5717 5718 // Thread we ran the function in may have gone away because we ran the target 5719 // Check that it's still there, and if it is put it back in the context. Also restore the 5720 // frame in the context if it is still present. 5721 thread = GetThreadList().FindThreadByIndexID(thread_idx_id, true).get(); 5722 if (thread) 5723 { 5724 exe_ctx.SetFrameSP (thread->GetFrameWithStackID (ctx_frame_id)); 5725 } 5726 5727 // Also restore the current process'es selected frame & thread, since this function calling may 5728 // be done behind the user's back. 5729 5730 if (selected_tid != LLDB_INVALID_THREAD_ID) 5731 { 5732 if (GetThreadList().SetSelectedThreadByIndexID (selected_tid) && selected_stack_id.IsValid()) 5733 { 5734 // We were able to restore the selected thread, now restore the frame: 5735 Mutex::Locker lock(GetThreadList().GetMutex()); 5736 StackFrameSP old_frame_sp = GetThreadList().GetSelectedThread()->GetFrameWithStackID(selected_stack_id); 5737 if (old_frame_sp) 5738 GetThreadList().GetSelectedThread()->SetSelectedFrame(old_frame_sp.get()); 5739 } 5740 } 5741 } 5742 5743 // If the process exited during the run of the thread plan, notify everyone. 5744 5745 if (event_to_broadcast_sp) 5746 { 5747 if (log) 5748 log->PutCString("Process::RunThreadPlan(): rebroadcasting event."); 5749 BroadcastEvent(event_to_broadcast_sp); 5750 } 5751 5752 return return_value; 5753} 5754 5755const char * 5756Process::ExecutionResultAsCString (ExecutionResults result) 5757{ 5758 const char *result_name; 5759 5760 switch (result) 5761 { 5762 case eExecutionCompleted: 5763 result_name = "eExecutionCompleted"; 5764 break; 5765 case eExecutionDiscarded: 5766 result_name = "eExecutionDiscarded"; 5767 break; 5768 case eExecutionInterrupted: 5769 result_name = "eExecutionInterrupted"; 5770 break; 5771 case eExecutionHitBreakpoint: 5772 result_name = "eExecutionHitBreakpoint"; 5773 break; 5774 case eExecutionSetupError: 5775 result_name = "eExecutionSetupError"; 5776 break; 5777 case eExecutionTimedOut: 5778 result_name = "eExecutionTimedOut"; 5779 break; 5780 case eExecutionStoppedForDebug: 5781 result_name = "eExecutionStoppedForDebug"; 5782 break; 5783 } 5784 return result_name; 5785} 5786 5787void 5788Process::GetStatus (Stream &strm) 5789{ 5790 const StateType state = GetState(); 5791 if (StateIsStoppedState(state, false)) 5792 { 5793 if (state == eStateExited) 5794 { 5795 int exit_status = GetExitStatus(); 5796 const char *exit_description = GetExitDescription(); 5797 strm.Printf ("Process %" PRIu64 " exited with status = %i (0x%8.8x) %s\n", 5798 GetID(), 5799 exit_status, 5800 exit_status, 5801 exit_description ? exit_description : ""); 5802 } 5803 else 5804 { 5805 if (state == eStateConnected) 5806 strm.Printf ("Connected to remote target.\n"); 5807 else 5808 strm.Printf ("Process %" PRIu64 " %s\n", GetID(), StateAsCString (state)); 5809 } 5810 } 5811 else 5812 { 5813 strm.Printf ("Process %" PRIu64 " is running.\n", GetID()); 5814 } 5815} 5816 5817size_t 5818Process::GetThreadStatus (Stream &strm, 5819 bool only_threads_with_stop_reason, 5820 uint32_t start_frame, 5821 uint32_t num_frames, 5822 uint32_t num_frames_with_source) 5823{ 5824 size_t num_thread_infos_dumped = 0; 5825 5826 Mutex::Locker locker (GetThreadList().GetMutex()); 5827 const size_t num_threads = GetThreadList().GetSize(); 5828 for (uint32_t i = 0; i < num_threads; i++) 5829 { 5830 Thread *thread = GetThreadList().GetThreadAtIndex(i).get(); 5831 if (thread) 5832 { 5833 if (only_threads_with_stop_reason) 5834 { 5835 StopInfoSP stop_info_sp = thread->GetStopInfo(); 5836 if (stop_info_sp.get() == NULL || !stop_info_sp->IsValid()) 5837 continue; 5838 } 5839 thread->GetStatus (strm, 5840 start_frame, 5841 num_frames, 5842 num_frames_with_source); 5843 ++num_thread_infos_dumped; 5844 } 5845 } 5846 return num_thread_infos_dumped; 5847} 5848 5849void 5850Process::AddInvalidMemoryRegion (const LoadRange ®ion) 5851{ 5852 m_memory_cache.AddInvalidRange(region.GetRangeBase(), region.GetByteSize()); 5853} 5854 5855bool 5856Process::RemoveInvalidMemoryRange (const LoadRange ®ion) 5857{ 5858 return m_memory_cache.RemoveInvalidRange(region.GetRangeBase(), region.GetByteSize()); 5859} 5860 5861void 5862Process::AddPreResumeAction (PreResumeActionCallback callback, void *baton) 5863{ 5864 m_pre_resume_actions.push_back(PreResumeCallbackAndBaton (callback, baton)); 5865} 5866 5867bool 5868Process::RunPreResumeActions () 5869{ 5870 bool result = true; 5871 while (!m_pre_resume_actions.empty()) 5872 { 5873 struct PreResumeCallbackAndBaton action = m_pre_resume_actions.back(); 5874 m_pre_resume_actions.pop_back(); 5875 bool this_result = action.callback (action.baton); 5876 if (result == true) result = this_result; 5877 } 5878 return result; 5879} 5880 5881void 5882Process::ClearPreResumeActions () 5883{ 5884 m_pre_resume_actions.clear(); 5885} 5886 5887void 5888Process::Flush () 5889{ 5890 m_thread_list.Flush(); 5891 m_extended_thread_list.Flush(); 5892 m_extended_thread_stop_id = 0; 5893 m_queue_list.Clear(); 5894 m_queue_list_stop_id = 0; 5895} 5896 5897void 5898Process::DidExec () 5899{ 5900 Target &target = GetTarget(); 5901 target.CleanupProcess (); 5902 target.ClearModules(false); 5903 m_dynamic_checkers_ap.reset(); 5904 m_abi_sp.reset(); 5905 m_system_runtime_ap.reset(); 5906 m_os_ap.reset(); 5907 m_dyld_ap.reset(); 5908 m_image_tokens.clear(); 5909 m_allocated_memory_cache.Clear(); 5910 m_language_runtimes.clear(); 5911 m_thread_list.DiscardThreadPlans(); 5912 m_memory_cache.Clear(true); 5913 DoDidExec(); 5914 CompleteAttach (); 5915 // Flush the process (threads and all stack frames) after running CompleteAttach() 5916 // in case the dynamic loader loaded things in new locations. 5917 Flush(); 5918 5919 // After we figure out what was loaded/unloaded in CompleteAttach, 5920 // we need to let the target know so it can do any cleanup it needs to. 5921 target.DidExec(); 5922} 5923 5924addr_t 5925Process::ResolveIndirectFunction(const Address *address, Error &error) 5926{ 5927 if (address == nullptr) 5928 { 5929 error.SetErrorString("Invalid address argument"); 5930 return LLDB_INVALID_ADDRESS; 5931 } 5932 5933 addr_t function_addr = LLDB_INVALID_ADDRESS; 5934 5935 addr_t addr = address->GetLoadAddress(&GetTarget()); 5936 std::map<addr_t,addr_t>::const_iterator iter = m_resolved_indirect_addresses.find(addr); 5937 if (iter != m_resolved_indirect_addresses.end()) 5938 { 5939 function_addr = (*iter).second; 5940 } 5941 else 5942 { 5943 if (!InferiorCall(this, address, function_addr)) 5944 { 5945 Symbol *symbol = address->CalculateSymbolContextSymbol(); 5946 error.SetErrorStringWithFormat ("Unable to call resolver for indirect function %s", 5947 symbol ? symbol->GetName().AsCString() : "<UNKNOWN>"); 5948 function_addr = LLDB_INVALID_ADDRESS; 5949 } 5950 else 5951 { 5952 m_resolved_indirect_addresses.insert(std::pair<addr_t, addr_t>(addr, function_addr)); 5953 } 5954 } 5955 return function_addr; 5956} 5957 5958