1 //===-- PlatformLinux.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 "PlatformLinux.h" 13 #include "lldb/Host/Config.h" 14 15 // C Includes 16 #include <stdio.h> 17 #ifndef LLDB_DISABLE_POSIX 18 #include <sys/utsname.h> 19 #endif 20 21 // C++ Includes 22 // Other libraries and framework includes 23 // Project includes 24 #include "lldb/Breakpoint/BreakpointLocation.h" 25 #include "lldb/Core/Debugger.h" 26 #include "lldb/Core/Error.h" 27 #include "lldb/Core/Log.h" 28 #include "lldb/Core/Module.h" 29 #include "lldb/Core/ModuleList.h" 30 #include "lldb/Core/ModuleSpec.h" 31 #include "lldb/Core/PluginManager.h" 32 #include "lldb/Core/State.h" 33 #include "lldb/Core/StreamString.h" 34 #include "lldb/Host/FileSpec.h" 35 #include "lldb/Host/HostInfo.h" 36 #include "lldb/Interpreter/OptionValueProperties.h" 37 #include "lldb/Interpreter/Property.h" 38 #include "lldb/Target/Target.h" 39 #include "lldb/Target/Process.h" 40 41 #if defined(__linux__) 42 #include "../../Process/Linux/NativeProcessLinux.h" 43 #endif 44 45 using namespace lldb; 46 using namespace lldb_private; 47 48 static uint32_t g_initialize_count = 0; 49 50 //------------------------------------------------------------------ 51 /// Code to handle the PlatformLinux settings 52 //------------------------------------------------------------------ 53 54 namespace 55 { 56 enum 57 { 58 ePropertyUseLlgsForLocal = 0, 59 }; 60 61 const PropertyDefinition* 62 GetStaticPropertyDefinitions () 63 { 64 static PropertyDefinition 65 g_properties[] = 66 { 67 { "use-llgs-for-local" , OptionValue::eTypeBoolean, true, false, NULL, NULL, "Control whether the platform uses llgs for local debug sessions." }, 68 { NULL , OptionValue::eTypeInvalid, false, 0 , NULL, NULL, NULL } 69 }; 70 71 // Allow environment variable to force using llgs-local. 72 if (getenv("PLATFORM_LINUX_FORCE_LLGS_LOCAL")) 73 g_properties[ePropertyUseLlgsForLocal].default_uint_value = true; 74 75 return g_properties; 76 } 77 } 78 79 class PlatformLinuxProperties : public Properties 80 { 81 public: 82 83 static ConstString & 84 GetSettingName () 85 { 86 static ConstString g_setting_name("linux"); 87 return g_setting_name; 88 } 89 90 PlatformLinuxProperties() : 91 Properties () 92 { 93 m_collection_sp.reset (new OptionValueProperties(GetSettingName ())); 94 m_collection_sp->Initialize (GetStaticPropertyDefinitions ()); 95 } 96 97 virtual 98 ~PlatformLinuxProperties() 99 { 100 } 101 102 bool 103 GetUseLlgsForLocal() const 104 { 105 const uint32_t idx = ePropertyUseLlgsForLocal; 106 return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, GetStaticPropertyDefinitions()[idx].default_uint_value != 0); 107 } 108 }; 109 110 typedef std::shared_ptr<PlatformLinuxProperties> PlatformLinuxPropertiesSP; 111 112 static const PlatformLinuxPropertiesSP & 113 GetGlobalProperties() 114 { 115 static PlatformLinuxPropertiesSP g_settings_sp; 116 if (!g_settings_sp) 117 g_settings_sp.reset (new PlatformLinuxProperties ()); 118 return g_settings_sp; 119 } 120 121 void 122 PlatformLinux::DebuggerInitialize (lldb_private::Debugger &debugger) 123 { 124 if (!PluginManager::GetSettingForPlatformPlugin (debugger, PlatformLinuxProperties::GetSettingName())) 125 { 126 const bool is_global_setting = true; 127 PluginManager::CreateSettingForPlatformPlugin (debugger, 128 GetGlobalProperties()->GetValueProperties(), 129 ConstString ("Properties for the PlatformLinux plug-in."), 130 is_global_setting); 131 } 132 } 133 134 135 //------------------------------------------------------------------ 136 137 PlatformSP 138 PlatformLinux::CreateInstance (bool force, const ArchSpec *arch) 139 { 140 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PLATFORM)); 141 if (log) 142 { 143 const char *arch_name; 144 if (arch && arch->GetArchitectureName ()) 145 arch_name = arch->GetArchitectureName (); 146 else 147 arch_name = "<null>"; 148 149 const char *triple_cstr = arch ? arch->GetTriple ().getTriple ().c_str() : "<null>"; 150 151 log->Printf ("PlatformLinux::%s(force=%s, arch={%s,%s})", __FUNCTION__, force ? "true" : "false", arch_name, triple_cstr); 152 } 153 154 bool create = force; 155 if (create == false && arch && arch->IsValid()) 156 { 157 const llvm::Triple &triple = arch->GetTriple(); 158 switch (triple.getVendor()) 159 { 160 case llvm::Triple::PC: 161 create = true; 162 break; 163 164 #if defined(__linux__) 165 // Only accept "unknown" for the vendor if the host is linux and 166 // it "unknown" wasn't specified (it was just returned because it 167 // was NOT specified_ 168 case llvm::Triple::VendorType::UnknownVendor: 169 create = !arch->TripleVendorWasSpecified(); 170 break; 171 #endif 172 default: 173 break; 174 } 175 176 if (create) 177 { 178 switch (triple.getOS()) 179 { 180 case llvm::Triple::Linux: 181 break; 182 183 #if defined(__linux__) 184 // Only accept "unknown" for the OS if the host is linux and 185 // it "unknown" wasn't specified (it was just returned because it 186 // was NOT specified) 187 case llvm::Triple::OSType::UnknownOS: 188 create = !arch->TripleOSWasSpecified(); 189 break; 190 #endif 191 default: 192 create = false; 193 break; 194 } 195 } 196 } 197 198 if (create) 199 { 200 if (log) 201 log->Printf ("PlatformLinux::%s() creating remote-linux platform", __FUNCTION__); 202 return PlatformSP(new PlatformLinux(false)); 203 } 204 205 if (log) 206 log->Printf ("PlatformLinux::%s() aborting creation of remote-linux platform", __FUNCTION__); 207 208 return PlatformSP(); 209 } 210 211 212 lldb_private::ConstString 213 PlatformLinux::GetPluginNameStatic (bool is_host) 214 { 215 if (is_host) 216 { 217 static ConstString g_host_name(Platform::GetHostPlatformName ()); 218 return g_host_name; 219 } 220 else 221 { 222 static ConstString g_remote_name("remote-linux"); 223 return g_remote_name; 224 } 225 } 226 227 const char * 228 PlatformLinux::GetPluginDescriptionStatic (bool is_host) 229 { 230 if (is_host) 231 return "Local Linux user platform plug-in."; 232 else 233 return "Remote Linux user platform plug-in."; 234 } 235 236 lldb_private::ConstString 237 PlatformLinux::GetPluginName() 238 { 239 return GetPluginNameStatic(IsHost()); 240 } 241 242 void 243 PlatformLinux::Initialize () 244 { 245 if (g_initialize_count++ == 0) 246 { 247 #if defined(__linux__) 248 PlatformSP default_platform_sp (new PlatformLinux(true)); 249 default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture()); 250 Platform::SetHostPlatform (default_platform_sp); 251 #endif 252 PluginManager::RegisterPlugin(PlatformLinux::GetPluginNameStatic(false), 253 PlatformLinux::GetPluginDescriptionStatic(false), 254 PlatformLinux::CreateInstance, 255 PlatformLinux::DebuggerInitialize); 256 } 257 } 258 259 void 260 PlatformLinux::Terminate () 261 { 262 if (g_initialize_count > 0) 263 { 264 if (--g_initialize_count == 0) 265 { 266 PluginManager::UnregisterPlugin (PlatformLinux::CreateInstance); 267 } 268 } 269 } 270 271 Error 272 PlatformLinux::ResolveExecutable (const FileSpec &exe_file, 273 const ArchSpec &exe_arch, 274 lldb::ModuleSP &exe_module_sp, 275 const FileSpecList *module_search_paths_ptr) 276 { 277 Error error; 278 // Nothing special to do here, just use the actual file and architecture 279 280 char exe_path[PATH_MAX]; 281 FileSpec resolved_exe_file (exe_file); 282 283 if (IsHost()) 284 { 285 // If we have "ls" as the exe_file, resolve the executable location based on 286 // the current path variables 287 if (!resolved_exe_file.Exists()) 288 { 289 exe_file.GetPath(exe_path, sizeof(exe_path)); 290 resolved_exe_file.SetFile(exe_path, true); 291 } 292 293 if (!resolved_exe_file.Exists()) 294 resolved_exe_file.ResolveExecutableLocation (); 295 296 if (resolved_exe_file.Exists()) 297 error.Clear(); 298 else 299 { 300 exe_file.GetPath(exe_path, sizeof(exe_path)); 301 error.SetErrorStringWithFormat("unable to find executable for '%s'", exe_path); 302 } 303 } 304 else 305 { 306 if (m_remote_platform_sp) 307 { 308 error = m_remote_platform_sp->ResolveExecutable (exe_file, 309 exe_arch, 310 exe_module_sp, 311 NULL); 312 } 313 else 314 { 315 // We may connect to a process and use the provided executable (Don't use local $PATH). 316 317 if (resolved_exe_file.Exists()) 318 error.Clear(); 319 else 320 error.SetErrorStringWithFormat("the platform is not currently connected, and '%s' doesn't exist in the system root.", exe_path); 321 } 322 } 323 324 if (error.Success()) 325 { 326 ModuleSpec module_spec (resolved_exe_file, exe_arch); 327 if (exe_arch.IsValid()) 328 { 329 error = ModuleList::GetSharedModule (module_spec, 330 exe_module_sp, 331 NULL, 332 NULL, 333 NULL); 334 if (error.Fail()) 335 { 336 // If we failed, it may be because the vendor and os aren't known. If that is the 337 // case, try setting them to the host architecture and give it another try. 338 llvm::Triple &module_triple = module_spec.GetArchitecture().GetTriple(); 339 bool is_vendor_specified = (module_triple.getVendor() != llvm::Triple::UnknownVendor); 340 bool is_os_specified = (module_triple.getOS() != llvm::Triple::UnknownOS); 341 if (!is_vendor_specified || !is_os_specified) 342 { 343 const llvm::Triple &host_triple = HostInfo::GetArchitecture(HostInfo::eArchKindDefault).GetTriple(); 344 345 if (!is_vendor_specified) 346 module_triple.setVendorName (host_triple.getVendorName()); 347 if (!is_os_specified) 348 module_triple.setOSName (host_triple.getOSName()); 349 350 error = ModuleList::GetSharedModule (module_spec, 351 exe_module_sp, 352 NULL, 353 NULL, 354 NULL); 355 } 356 } 357 358 // TODO find out why exe_module_sp might be NULL 359 if (!exe_module_sp || exe_module_sp->GetObjectFile() == NULL) 360 { 361 exe_module_sp.reset(); 362 error.SetErrorStringWithFormat ("'%s' doesn't contain the architecture %s", 363 exe_file.GetPath().c_str(), 364 exe_arch.GetArchitectureName()); 365 } 366 } 367 else 368 { 369 // No valid architecture was specified, ask the platform for 370 // the architectures that we should be using (in the correct order) 371 // and see if we can find a match that way 372 StreamString arch_names; 373 for (uint32_t idx = 0; GetSupportedArchitectureAtIndex (idx, module_spec.GetArchitecture()); ++idx) 374 { 375 error = ModuleList::GetSharedModule (module_spec, 376 exe_module_sp, 377 NULL, 378 NULL, 379 NULL); 380 // Did we find an executable using one of the 381 if (error.Success()) 382 { 383 if (exe_module_sp && exe_module_sp->GetObjectFile()) 384 break; 385 else 386 error.SetErrorToGenericError(); 387 } 388 389 if (idx > 0) 390 arch_names.PutCString (", "); 391 arch_names.PutCString (module_spec.GetArchitecture().GetArchitectureName()); 392 } 393 394 if (error.Fail() || !exe_module_sp) 395 { 396 if (exe_file.Readable()) 397 { 398 error.SetErrorStringWithFormat ("'%s' doesn't contain any '%s' platform architectures: %s", 399 exe_file.GetPath().c_str(), 400 GetPluginName().GetCString(), 401 arch_names.GetString().c_str()); 402 } 403 else 404 { 405 error.SetErrorStringWithFormat("'%s' is not readable", exe_file.GetPath().c_str()); 406 } 407 } 408 } 409 } 410 411 return error; 412 } 413 414 Error 415 PlatformLinux::GetFileWithUUID (const FileSpec &platform_file, 416 const UUID *uuid_ptr, FileSpec &local_file) 417 { 418 if (IsRemote()) 419 { 420 if (m_remote_platform_sp) 421 return m_remote_platform_sp->GetFileWithUUID (platform_file, uuid_ptr, local_file); 422 } 423 424 // Default to the local case 425 local_file = platform_file; 426 return Error(); 427 } 428 429 430 //------------------------------------------------------------------ 431 /// Default Constructor 432 //------------------------------------------------------------------ 433 PlatformLinux::PlatformLinux (bool is_host) : 434 PlatformPOSIX(is_host) // This is the local host platform 435 { 436 } 437 438 //------------------------------------------------------------------ 439 /// Destructor. 440 /// 441 /// The destructor is virtual since this class is designed to be 442 /// inherited from by the plug-in instance. 443 //------------------------------------------------------------------ 444 PlatformLinux::~PlatformLinux() 445 { 446 } 447 448 bool 449 PlatformLinux::GetProcessInfo (lldb::pid_t pid, ProcessInstanceInfo &process_info) 450 { 451 bool success = false; 452 if (IsHost()) 453 { 454 success = Platform::GetProcessInfo (pid, process_info); 455 } 456 else 457 { 458 if (m_remote_platform_sp) 459 success = m_remote_platform_sp->GetProcessInfo (pid, process_info); 460 } 461 return success; 462 } 463 464 bool 465 PlatformLinux::GetSupportedArchitectureAtIndex (uint32_t idx, ArchSpec &arch) 466 { 467 if (idx == 0) 468 { 469 arch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault); 470 return arch.IsValid(); 471 } 472 else if (idx == 1) 473 { 474 // If the default host architecture is 64-bit, look for a 32-bit variant 475 ArchSpec hostArch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault); 476 if (hostArch.IsValid() && hostArch.GetTriple().isArch64Bit()) 477 { 478 arch = HostInfo::GetArchitecture(HostInfo::eArchKind32); 479 return arch.IsValid(); 480 } 481 } 482 return false; 483 } 484 485 void 486 PlatformLinux::GetStatus (Stream &strm) 487 { 488 Platform::GetStatus(strm); 489 490 #ifndef LLDB_DISABLE_POSIX 491 struct utsname un; 492 493 if (uname(&un)) 494 return; 495 496 strm.Printf (" Kernel: %s\n", un.sysname); 497 strm.Printf (" Release: %s\n", un.release); 498 strm.Printf (" Version: %s\n", un.version); 499 #endif 500 } 501 502 size_t 503 PlatformLinux::GetSoftwareBreakpointTrapOpcode (Target &target, 504 BreakpointSite *bp_site) 505 { 506 ArchSpec arch = target.GetArchitecture(); 507 const uint8_t *trap_opcode = NULL; 508 size_t trap_opcode_size = 0; 509 510 switch (arch.GetMachine()) 511 { 512 default: 513 assert(false && "CPU type not supported!"); 514 break; 515 516 case llvm::Triple::aarch64: 517 { 518 static const uint8_t g_aarch64_opcode[] = { 0x00, 0x00, 0x20, 0xd4 }; 519 trap_opcode = g_aarch64_opcode; 520 trap_opcode_size = sizeof(g_aarch64_opcode); 521 } 522 break; 523 case llvm::Triple::x86: 524 case llvm::Triple::x86_64: 525 { 526 static const uint8_t g_i386_breakpoint_opcode[] = { 0xCC }; 527 trap_opcode = g_i386_breakpoint_opcode; 528 trap_opcode_size = sizeof(g_i386_breakpoint_opcode); 529 } 530 break; 531 case llvm::Triple::hexagon: 532 { 533 static const uint8_t g_hex_opcode[] = { 0x0c, 0xdb, 0x00, 0x54 }; 534 trap_opcode = g_hex_opcode; 535 trap_opcode_size = sizeof(g_hex_opcode); 536 } 537 break; 538 case llvm::Triple::arm: 539 { 540 // The ARM reference recommends the use of 0xe7fddefe and 0xdefe 541 // but the linux kernel does otherwise. 542 static const uint8_t g_arm_breakpoint_opcode[] = { 0xf0, 0x01, 0xf0, 0xe7 }; 543 static const uint8_t g_thumb_breakpoint_opcode[] = { 0x01, 0xde }; 544 545 lldb::BreakpointLocationSP bp_loc_sp (bp_site->GetOwnerAtIndex (0)); 546 AddressClass addr_class = eAddressClassUnknown; 547 548 if (bp_loc_sp) 549 addr_class = bp_loc_sp->GetAddress ().GetAddressClass (); 550 551 if (addr_class == eAddressClassCodeAlternateISA 552 || (addr_class == eAddressClassUnknown 553 && bp_loc_sp->GetAddress().GetOffset() & 1)) 554 { 555 trap_opcode = g_thumb_breakpoint_opcode; 556 trap_opcode_size = sizeof(g_thumb_breakpoint_opcode); 557 } 558 else 559 { 560 trap_opcode = g_arm_breakpoint_opcode; 561 trap_opcode_size = sizeof(g_arm_breakpoint_opcode); 562 } 563 } 564 break; 565 } 566 567 if (bp_site->SetTrapOpcode(trap_opcode, trap_opcode_size)) 568 return trap_opcode_size; 569 return 0; 570 } 571 572 int32_t 573 PlatformLinux::GetResumeCountForLaunchInfo (ProcessLaunchInfo &launch_info) 574 { 575 int32_t resume_count = 0; 576 577 // Always resume past the initial stop when we use eLaunchFlagDebug 578 if (launch_info.GetFlags ().Test (eLaunchFlagDebug)) 579 { 580 // Resume past the stop for the final exec into the true inferior. 581 ++resume_count; 582 } 583 584 // If we're not launching a shell, we're done. 585 const FileSpec &shell = launch_info.GetShell(); 586 if (!shell) 587 return resume_count; 588 589 std::string shell_string = shell.GetPath(); 590 // We're in a shell, so for sure we have to resume past the shell exec. 591 ++resume_count; 592 593 // Figure out what shell we're planning on using. 594 const char *shell_name = strrchr (shell_string.c_str(), '/'); 595 if (shell_name == NULL) 596 shell_name = shell_string.c_str(); 597 else 598 shell_name++; 599 600 if (strcmp (shell_name, "csh") == 0 601 || strcmp (shell_name, "tcsh") == 0 602 || strcmp (shell_name, "zsh") == 0 603 || strcmp (shell_name, "sh") == 0) 604 { 605 // These shells seem to re-exec themselves. Add another resume. 606 ++resume_count; 607 } 608 609 return resume_count; 610 } 611 612 bool 613 PlatformLinux::UseLlgsForLocalDebugging () 614 { 615 PlatformLinuxPropertiesSP properties_sp = GetGlobalProperties (); 616 assert (properties_sp && "global properties shared pointer is null"); 617 return properties_sp ? properties_sp->GetUseLlgsForLocal () : false; 618 } 619 620 bool 621 PlatformLinux::CanDebugProcess () 622 { 623 if (IsHost ()) 624 { 625 // The platform only does local debugging (i.e. uses llgs) when the setting indicates we do that. 626 // Otherwise, we'll use ProcessLinux/ProcessPOSIX to handle with ProcessMonitor. 627 return UseLlgsForLocalDebugging (); 628 } 629 else 630 { 631 // If we're connected, we can debug. 632 return IsConnected (); 633 } 634 } 635 636 // For local debugging, Linux will override the debug logic to use llgs-launch rather than 637 // lldb-launch, llgs-attach. This differs from current lldb-launch, debugserver-attach 638 // approach on MacOSX. 639 lldb::ProcessSP 640 PlatformLinux::DebugProcess (ProcessLaunchInfo &launch_info, 641 Debugger &debugger, 642 Target *target, // Can be NULL, if NULL create a new target, else use existing one 643 Listener &listener, 644 Error &error) 645 { 646 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PLATFORM)); 647 if (log) 648 log->Printf ("PlatformLinux::%s entered (target %p)", __FUNCTION__, static_cast<void*>(target)); 649 650 // If we're a remote host, use standard behavior from parent class. 651 if (!IsHost ()) 652 return PlatformPOSIX::DebugProcess (launch_info, debugger, target, listener, error); 653 654 // 655 // For local debugging, we'll insist on having ProcessGDBRemote create the process. 656 // 657 658 ProcessSP process_sp; 659 660 // Ensure we're using llgs for local debugging. 661 if (!UseLlgsForLocalDebugging ()) 662 { 663 assert (false && "we're trying to debug a local process but platform.plugin.linux.use-llgs-for-local is false, should never get here"); 664 error.SetErrorString ("attempted to start gdb-remote-based debugging for local process but platform.plugin.linux.use-llgs-for-local is false"); 665 return process_sp; 666 } 667 668 // Make sure we stop at the entry point 669 launch_info.GetFlags ().Set (eLaunchFlagDebug); 670 671 // We always launch the process we are going to debug in a separate process 672 // group, since then we can handle ^C interrupts ourselves w/o having to worry 673 // about the target getting them as well. 674 launch_info.SetLaunchInSeparateProcessGroup(true); 675 676 // Ensure we have a target. 677 if (target == nullptr) 678 { 679 if (log) 680 log->Printf ("PlatformLinux::%s creating new target", __FUNCTION__); 681 682 TargetSP new_target_sp; 683 error = debugger.GetTargetList().CreateTarget (debugger, 684 nullptr, 685 nullptr, 686 false, 687 nullptr, 688 new_target_sp); 689 if (error.Fail ()) 690 { 691 if (log) 692 log->Printf ("PlatformLinux::%s failed to create new target: %s", __FUNCTION__, error.AsCString ()); 693 return process_sp; 694 } 695 696 target = new_target_sp.get(); 697 if (!target) 698 { 699 error.SetErrorString ("CreateTarget() returned nullptr"); 700 if (log) 701 log->Printf ("PlatformLinux::%s failed: %s", __FUNCTION__, error.AsCString ()); 702 return process_sp; 703 } 704 } 705 else 706 { 707 if (log) 708 log->Printf ("PlatformLinux::%s using provided target", __FUNCTION__); 709 } 710 711 // Mark target as currently selected target. 712 debugger.GetTargetList().SetSelectedTarget(target); 713 714 // Now create the gdb-remote process. 715 if (log) 716 log->Printf ("PlatformLinux::%s having target create process with gdb-remote plugin", __FUNCTION__); 717 process_sp = target->CreateProcess (listener, "gdb-remote", nullptr); 718 719 if (!process_sp) 720 { 721 error.SetErrorString ("CreateProcess() failed for gdb-remote process"); 722 if (log) 723 log->Printf ("PlatformLinux::%s failed: %s", __FUNCTION__, error.AsCString ()); 724 return process_sp; 725 } 726 else 727 { 728 if (log) 729 log->Printf ("PlatformLinux::%s successfully created process", __FUNCTION__); 730 } 731 732 // Set the unix signals properly. 733 process_sp->SetUnixSignals (Host::GetUnixSignals ()); 734 735 // Adjust launch for a hijacker. 736 ListenerSP listener_sp; 737 if (!launch_info.GetHijackListener ()) 738 { 739 if (log) 740 log->Printf ("PlatformLinux::%s setting up hijacker", __FUNCTION__); 741 742 listener_sp.reset (new Listener("lldb.PlatformLinux.DebugProcess.hijack")); 743 launch_info.SetHijackListener (listener_sp); 744 process_sp->HijackProcessEvents (listener_sp.get ()); 745 } 746 747 // Log file actions. 748 if (log) 749 { 750 log->Printf ("PlatformLinux::%s launching process with the following file actions:", __FUNCTION__); 751 752 StreamString stream; 753 size_t i = 0; 754 const FileAction *file_action; 755 while ((file_action = launch_info.GetFileActionAtIndex (i++)) != nullptr) 756 { 757 file_action->Dump (stream); 758 log->PutCString (stream.GetString().c_str ()); 759 stream.Clear(); 760 } 761 } 762 763 // Do the launch. 764 error = process_sp->Launch(launch_info); 765 if (error.Success ()) 766 { 767 // Handle the hijacking of process events. 768 if (listener_sp) 769 { 770 const StateType state = process_sp->WaitForProcessToStop (NULL, NULL, false, listener_sp.get()); 771 process_sp->RestoreProcessEvents(); 772 773 if (state == eStateStopped) 774 { 775 if (log) 776 log->Printf ("PlatformLinux::%s pid %" PRIu64 " state %s\n", 777 __FUNCTION__, process_sp->GetID (), StateAsCString (state)); 778 } 779 else 780 { 781 if (log) 782 log->Printf ("PlatformLinux::%s pid %" PRIu64 " state is not stopped - %s\n", 783 __FUNCTION__, process_sp->GetID (), StateAsCString (state)); 784 } 785 } 786 787 // Hook up process PTY if we have one (which we should for local debugging with llgs). 788 int pty_fd = launch_info.GetPTY().ReleaseMasterFileDescriptor(); 789 if (pty_fd != lldb_utility::PseudoTerminal::invalid_fd) 790 { 791 process_sp->SetSTDIOFileDescriptor(pty_fd); 792 if (log) 793 log->Printf ("PlatformLinux::%s pid %" PRIu64 " hooked up STDIO pty to process", __FUNCTION__, process_sp->GetID ()); 794 } 795 else 796 { 797 if (log) 798 log->Printf ("PlatformLinux::%s pid %" PRIu64 " not using process STDIO pty", __FUNCTION__, process_sp->GetID ()); 799 } 800 } 801 else 802 { 803 if (log) 804 log->Printf ("PlatformLinux::%s process launch failed: %s", __FUNCTION__, error.AsCString ()); 805 // FIXME figure out appropriate cleanup here. Do we delete the target? Do we delete the process? Does our caller do that? 806 } 807 808 return process_sp; 809 } 810 811 void 812 PlatformLinux::CalculateTrapHandlerSymbolNames () 813 { 814 m_trap_handlers.push_back (ConstString ("_sigtramp")); 815 } 816 817 Error 818 PlatformLinux::LaunchNativeProcess ( 819 ProcessLaunchInfo &launch_info, 820 lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, 821 NativeProcessProtocolSP &process_sp) 822 { 823 #if !defined(__linux__) 824 return Error("only implemented on Linux hosts"); 825 #else 826 if (!IsHost ()) 827 return Error("PlatformLinux::%s (): cannot launch a debug process when not the host", __FUNCTION__); 828 829 // Retrieve the exe module. 830 lldb::ModuleSP exe_module_sp; 831 832 Error error = ResolveExecutable ( 833 launch_info.GetExecutableFile (), 834 launch_info.GetArchitecture (), 835 exe_module_sp, 836 NULL); 837 838 if (!error.Success ()) 839 return error; 840 841 if (!exe_module_sp) 842 return Error("exe_module_sp could not be resolved for %s", launch_info.GetExecutableFile ().GetPath ().c_str ()); 843 844 // Launch it for debugging 845 error = NativeProcessLinux::LaunchProcess ( 846 exe_module_sp.get (), 847 launch_info, 848 native_delegate, 849 process_sp); 850 851 return error; 852 #endif 853 } 854 855 Error 856 PlatformLinux::AttachNativeProcess (lldb::pid_t pid, 857 lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, 858 NativeProcessProtocolSP &process_sp) 859 { 860 #if !defined(__linux__) 861 return Error("only implemented on Linux hosts"); 862 #else 863 if (!IsHost ()) 864 return Error("PlatformLinux::%s (): cannot attach to a debug process when not the host", __FUNCTION__); 865 866 // Launch it for debugging 867 return NativeProcessLinux::AttachToProcess (pid, native_delegate, process_sp); 868 #endif 869 } 870