1 //===-- Platform.cpp --------------------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "lldb/Target/Platform.h"
11 
12 // C Includes
13 // C++ Includes
14 // Other libraries and framework includes
15 // Project includes
16 #include "lldb/Breakpoint/BreakpointIDList.h"
17 #include "lldb/Core/Error.h"
18 #include "lldb/Core/Log.h"
19 #include "lldb/Core/ModuleSpec.h"
20 #include "lldb/Core/PluginManager.h"
21 #include "lldb/Host/FileSpec.h"
22 #include "lldb/Host/Host.h"
23 #include "lldb/Target/Process.h"
24 #include "lldb/Target/Target.h"
25 #include "lldb/Utility/Utils.h"
26 
27 using namespace lldb;
28 using namespace lldb_private;
29 
30 // Use a singleton function for g_local_platform_sp to avoid init
31 // constructors since LLDB is often part of a shared library
32 static PlatformSP&
33 GetDefaultPlatformSP ()
34 {
35     static PlatformSP g_default_platform_sp;
36     return g_default_platform_sp;
37 }
38 
39 static Mutex &
40 GetConnectedPlatformListMutex ()
41 {
42     static Mutex g_remote_connected_platforms_mutex (Mutex::eMutexTypeRecursive);
43     return g_remote_connected_platforms_mutex;
44 }
45 static std::vector<PlatformSP> &
46 GetConnectedPlatformList ()
47 {
48     static std::vector<PlatformSP> g_remote_connected_platforms;
49     return g_remote_connected_platforms;
50 }
51 
52 
53 const char *
54 Platform::GetHostPlatformName ()
55 {
56     return "host";
57 }
58 
59 //------------------------------------------------------------------
60 /// Get the native host platform plug-in.
61 ///
62 /// There should only be one of these for each host that LLDB runs
63 /// upon that should be statically compiled in and registered using
64 /// preprocessor macros or other similar build mechanisms.
65 ///
66 /// This platform will be used as the default platform when launching
67 /// or attaching to processes unless another platform is specified.
68 //------------------------------------------------------------------
69 PlatformSP
70 Platform::GetDefaultPlatform ()
71 {
72     return GetDefaultPlatformSP ();
73 }
74 
75 void
76 Platform::SetDefaultPlatform (const lldb::PlatformSP &platform_sp)
77 {
78     // The native platform should use its static void Platform::Initialize()
79     // function to register itself as the native platform.
80     GetDefaultPlatformSP () = platform_sp;
81 }
82 
83 Error
84 Platform::GetFile (const FileSpec &platform_file,
85                    const UUID *uuid_ptr,
86                    FileSpec &local_file)
87 {
88     // Default to the local case
89     local_file = platform_file;
90     return Error();
91 }
92 
93 FileSpecList
94 Platform::LocateExecutableScriptingResources (Target *target, Module &module)
95 {
96     return FileSpecList();
97 }
98 
99 Platform*
100 Platform::FindPlugin (Process *process, const ConstString &plugin_name)
101 {
102     PlatformCreateInstance create_callback = NULL;
103     if (plugin_name)
104     {
105         create_callback  = PluginManager::GetPlatformCreateCallbackForPluginName (plugin_name);
106         if (create_callback)
107         {
108             ArchSpec arch;
109             if (process)
110             {
111                 arch = process->GetTarget().GetArchitecture();
112             }
113             std::unique_ptr<Platform> instance_ap(create_callback(process, &arch));
114             if (instance_ap.get())
115                 return instance_ap.release();
116         }
117     }
118     else
119     {
120         for (uint32_t idx = 0; (create_callback = PluginManager::GetPlatformCreateCallbackAtIndex(idx)) != NULL; ++idx)
121         {
122             std::unique_ptr<Platform> instance_ap(create_callback(process, nullptr));
123             if (instance_ap.get())
124                 return instance_ap.release();
125         }
126     }
127     return NULL;
128 }
129 
130 Error
131 Platform::GetSharedModule (const ModuleSpec &module_spec,
132                            ModuleSP &module_sp,
133                            const FileSpecList *module_search_paths_ptr,
134                            ModuleSP *old_module_sp_ptr,
135                            bool *did_create_ptr)
136 {
137     // Don't do any path remapping for the default implementation
138     // of the platform GetSharedModule function, just call through
139     // to our static ModuleList function. Platform subclasses that
140     // implement remote debugging, might have a developer kits
141     // installed that have cached versions of the files for the
142     // remote target, or might implement a download and cache
143     // locally implementation.
144     const bool always_create = false;
145     return ModuleList::GetSharedModule (module_spec,
146                                         module_sp,
147                                         module_search_paths_ptr,
148                                         old_module_sp_ptr,
149                                         did_create_ptr,
150                                         always_create);
151 }
152 
153 PlatformSP
154 Platform::Create (const char *platform_name, Error &error)
155 {
156     PlatformCreateInstance create_callback = NULL;
157     lldb::PlatformSP platform_sp;
158     if (platform_name && platform_name[0])
159     {
160         ConstString const_platform_name (platform_name);
161         create_callback = PluginManager::GetPlatformCreateCallbackForPluginName (const_platform_name);
162         if (create_callback)
163             platform_sp.reset(create_callback(true, NULL));
164         else
165             error.SetErrorStringWithFormat ("unable to find a plug-in for the platform named \"%s\"", platform_name);
166     }
167     else
168         error.SetErrorString ("invalid platform name");
169     return platform_sp;
170 }
171 
172 
173 PlatformSP
174 Platform::Create (const ArchSpec &arch, ArchSpec *platform_arch_ptr, Error &error)
175 {
176     lldb::PlatformSP platform_sp;
177     if (arch.IsValid())
178     {
179         uint32_t idx;
180         PlatformCreateInstance create_callback;
181         // First try exact arch matches across all platform plug-ins
182         bool exact = true;
183         for (idx = 0; (create_callback = PluginManager::GetPlatformCreateCallbackAtIndex (idx)); ++idx)
184         {
185             if (create_callback)
186             {
187                 platform_sp.reset(create_callback(false, &arch));
188                 if (platform_sp && platform_sp->IsCompatibleArchitecture(arch, exact, platform_arch_ptr))
189                     return platform_sp;
190             }
191         }
192         // Next try compatible arch matches across all platform plug-ins
193         exact = false;
194         for (idx = 0; (create_callback = PluginManager::GetPlatformCreateCallbackAtIndex (idx)); ++idx)
195         {
196             if (create_callback)
197             {
198                 platform_sp.reset(create_callback(false, &arch));
199                 if (platform_sp && platform_sp->IsCompatibleArchitecture(arch, exact, platform_arch_ptr))
200                     return platform_sp;
201             }
202         }
203     }
204     else
205         error.SetErrorString ("invalid platform name");
206     if (platform_arch_ptr)
207         platform_arch_ptr->Clear();
208     platform_sp.reset();
209     return platform_sp;
210 }
211 
212 uint32_t
213 Platform::GetNumConnectedRemotePlatforms ()
214 {
215     Mutex::Locker locker (GetConnectedPlatformListMutex ());
216     return GetConnectedPlatformList().size();
217 }
218 
219 PlatformSP
220 Platform::GetConnectedRemotePlatformAtIndex (uint32_t idx)
221 {
222     PlatformSP platform_sp;
223     {
224         Mutex::Locker locker (GetConnectedPlatformListMutex ());
225         if (idx < GetConnectedPlatformList().size())
226             platform_sp = GetConnectedPlatformList ()[idx];
227     }
228     return platform_sp;
229 }
230 
231 //------------------------------------------------------------------
232 /// Default Constructor
233 //------------------------------------------------------------------
234 Platform::Platform (bool is_host) :
235     m_is_host (is_host),
236     m_os_version_set_while_connected (false),
237     m_system_arch_set_while_connected (false),
238     m_sdk_sysroot (),
239     m_sdk_build (),
240     m_remote_url (),
241     m_name (),
242     m_major_os_version (UINT32_MAX),
243     m_minor_os_version (UINT32_MAX),
244     m_update_os_version (UINT32_MAX),
245     m_system_arch(),
246     m_uid_map_mutex (Mutex::eMutexTypeNormal),
247     m_gid_map_mutex (Mutex::eMutexTypeNormal),
248     m_uid_map(),
249     m_gid_map(),
250     m_max_uid_name_len (0),
251     m_max_gid_name_len (0),
252     m_supports_rsync (false),
253     m_rsync_opts (),
254     m_rsync_prefix (),
255     m_supports_ssh (false),
256     m_ssh_opts (),
257     m_ignores_remote_hostname (false)
258 {
259     Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT));
260     if (log)
261         log->Printf ("%p Platform::Platform()", this);
262 }
263 
264 //------------------------------------------------------------------
265 /// Destructor.
266 ///
267 /// The destructor is virtual since this class is designed to be
268 /// inherited from by the plug-in instance.
269 //------------------------------------------------------------------
270 Platform::~Platform()
271 {
272     Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT));
273     if (log)
274         log->Printf ("%p Platform::~Platform()", this);
275 }
276 
277 void
278 Platform::GetStatus (Stream &strm)
279 {
280     uint32_t major = UINT32_MAX;
281     uint32_t minor = UINT32_MAX;
282     uint32_t update = UINT32_MAX;
283     std::string s;
284     strm.Printf ("  Platform: %s\n", GetPluginName().GetCString());
285 
286     ArchSpec arch (GetSystemArchitecture());
287     if (arch.IsValid())
288     {
289         if (!arch.GetTriple().str().empty())
290         strm.Printf("    Triple: %s\n", arch.GetTriple().str().c_str());
291     }
292 
293     if (GetOSVersion(major, minor, update))
294     {
295         strm.Printf("OS Version: %u", major);
296         if (minor != UINT32_MAX)
297             strm.Printf(".%u", minor);
298         if (update != UINT32_MAX)
299             strm.Printf(".%u", update);
300 
301         if (GetOSBuildString (s))
302             strm.Printf(" (%s)", s.c_str());
303 
304         strm.EOL();
305     }
306 
307     if (GetOSKernelDescription (s))
308         strm.Printf("    Kernel: %s\n", s.c_str());
309 
310     if (IsHost())
311     {
312         strm.Printf("  Hostname: %s\n", GetHostname());
313     }
314     else
315     {
316         const bool is_connected = IsConnected();
317         if (is_connected)
318             strm.Printf("  Hostname: %s\n", GetHostname());
319         strm.Printf(" Connected: %s\n", is_connected ? "yes" : "no");
320     }
321 
322     if (!IsConnected())
323         return;
324 
325     std::string specific_info(GetPlatformSpecificConnectionInformation());
326 
327     if (specific_info.empty() == false)
328         strm.Printf("Platform-specific connection: %s\n", specific_info.c_str());
329 }
330 
331 
332 bool
333 Platform::GetOSVersion (uint32_t &major,
334                         uint32_t &minor,
335                         uint32_t &update)
336 {
337     bool success = m_major_os_version != UINT32_MAX;
338     if (IsHost())
339     {
340         if (!success)
341         {
342             // We have a local host platform
343             success = Host::GetOSVersion (m_major_os_version,
344                                           m_minor_os_version,
345                                           m_update_os_version);
346             m_os_version_set_while_connected = success;
347         }
348     }
349     else
350     {
351         // We have a remote platform. We can only fetch the remote
352         // OS version if we are connected, and we don't want to do it
353         // more than once.
354 
355         const bool is_connected = IsConnected();
356 
357         bool fetch = false;
358         if (success)
359         {
360             // We have valid OS version info, check to make sure it wasn't
361             // manually set prior to connecting. If it was manually set prior
362             // to connecting, then lets fetch the actual OS version info
363             // if we are now connected.
364             if (is_connected && !m_os_version_set_while_connected)
365                 fetch = true;
366         }
367         else
368         {
369             // We don't have valid OS version info, fetch it if we are connected
370             fetch = is_connected;
371         }
372 
373         if (fetch)
374         {
375             success = GetRemoteOSVersion ();
376             m_os_version_set_while_connected = success;
377         }
378     }
379 
380     if (success)
381     {
382         major = m_major_os_version;
383         minor = m_minor_os_version;
384         update = m_update_os_version;
385     }
386     return success;
387 }
388 
389 bool
390 Platform::GetOSBuildString (std::string &s)
391 {
392     if (IsHost())
393         return Host::GetOSBuildString (s);
394     else
395         return GetRemoteOSBuildString (s);
396 }
397 
398 bool
399 Platform::GetOSKernelDescription (std::string &s)
400 {
401     if (IsHost())
402         return Host::GetOSKernelDescription (s);
403     else
404         return GetRemoteOSKernelDescription (s);
405 }
406 
407 ConstString
408 Platform::GetName ()
409 {
410     const char *name = GetHostname();
411     if (name == NULL || name[0] == '\0')
412         return GetPluginName();
413     return ConstString (name);
414 }
415 
416 const char *
417 Platform::GetHostname ()
418 {
419     if (IsHost())
420         return "localhost";
421 
422     if (m_name.empty())
423         return NULL;
424     return m_name.c_str();
425 }
426 
427 const char *
428 Platform::GetUserName (uint32_t uid)
429 {
430     const char *user_name = GetCachedUserName(uid);
431     if (user_name)
432         return user_name;
433     if (IsHost())
434     {
435         std::string name;
436         if (Host::GetUserName(uid, name))
437             return SetCachedUserName (uid, name.c_str(), name.size());
438     }
439     return NULL;
440 }
441 
442 const char *
443 Platform::GetGroupName (uint32_t gid)
444 {
445     const char *group_name = GetCachedGroupName(gid);
446     if (group_name)
447         return group_name;
448     if (IsHost())
449     {
450         std::string name;
451         if (Host::GetGroupName(gid, name))
452             return SetCachedGroupName (gid, name.c_str(), name.size());
453     }
454     return NULL;
455 }
456 
457 bool
458 Platform::SetOSVersion (uint32_t major,
459                         uint32_t minor,
460                         uint32_t update)
461 {
462     if (IsHost())
463     {
464         // We don't need anyone setting the OS version for the host platform,
465         // we should be able to figure it out by calling Host::GetOSVersion(...).
466         return false;
467     }
468     else
469     {
470         // We have a remote platform, allow setting the target OS version if
471         // we aren't connected, since if we are connected, we should be able to
472         // request the remote OS version from the connected platform.
473         if (IsConnected())
474             return false;
475         else
476         {
477             // We aren't connected and we might want to set the OS version
478             // ahead of time before we connect so we can peruse files and
479             // use a local SDK or PDK cache of support files to disassemble
480             // or do other things.
481             m_major_os_version = major;
482             m_minor_os_version = minor;
483             m_update_os_version = update;
484             return true;
485         }
486     }
487     return false;
488 }
489 
490 
491 Error
492 Platform::ResolveExecutable (const FileSpec &exe_file,
493                              const ArchSpec &exe_arch,
494                              lldb::ModuleSP &exe_module_sp,
495                              const FileSpecList *module_search_paths_ptr)
496 {
497     Error error;
498     if (exe_file.Exists())
499     {
500         ModuleSpec module_spec (exe_file, exe_arch);
501         if (module_spec.GetArchitecture().IsValid())
502         {
503             error = ModuleList::GetSharedModule (module_spec,
504                                                  exe_module_sp,
505                                                  module_search_paths_ptr,
506                                                  NULL,
507                                                  NULL);
508         }
509         else
510         {
511             // No valid architecture was specified, ask the platform for
512             // the architectures that we should be using (in the correct order)
513             // and see if we can find a match that way
514             for (uint32_t idx = 0; GetSupportedArchitectureAtIndex (idx, module_spec.GetArchitecture()); ++idx)
515             {
516                 error = ModuleList::GetSharedModule (module_spec,
517                                                      exe_module_sp,
518                                                      module_search_paths_ptr,
519                                                      NULL,
520                                                      NULL);
521                 // Did we find an executable using one of the
522                 if (error.Success() && exe_module_sp)
523                     break;
524             }
525         }
526     }
527     else
528     {
529         error.SetErrorStringWithFormat ("'%s' does not exist",
530                                         exe_file.GetPath().c_str());
531     }
532     return error;
533 }
534 
535 Error
536 Platform::ResolveSymbolFile (Target &target,
537                              const ModuleSpec &sym_spec,
538                              FileSpec &sym_file)
539 {
540     Error error;
541     if (sym_spec.GetSymbolFileSpec().Exists())
542         sym_file = sym_spec.GetSymbolFileSpec();
543     else
544         error.SetErrorString("unable to resolve symbol file");
545     return error;
546 
547 }
548 
549 
550 
551 bool
552 Platform::ResolveRemotePath (const FileSpec &platform_path,
553                              FileSpec &resolved_platform_path)
554 {
555     resolved_platform_path = platform_path;
556     return resolved_platform_path.ResolvePath();
557 }
558 
559 
560 const ArchSpec &
561 Platform::GetSystemArchitecture()
562 {
563     if (IsHost())
564     {
565         if (!m_system_arch.IsValid())
566         {
567             // We have a local host platform
568             m_system_arch = Host::GetArchitecture();
569             m_system_arch_set_while_connected = m_system_arch.IsValid();
570         }
571     }
572     else
573     {
574         // We have a remote platform. We can only fetch the remote
575         // system architecture if we are connected, and we don't want to do it
576         // more than once.
577 
578         const bool is_connected = IsConnected();
579 
580         bool fetch = false;
581         if (m_system_arch.IsValid())
582         {
583             // We have valid OS version info, check to make sure it wasn't
584             // manually set prior to connecting. If it was manually set prior
585             // to connecting, then lets fetch the actual OS version info
586             // if we are now connected.
587             if (is_connected && !m_system_arch_set_while_connected)
588                 fetch = true;
589         }
590         else
591         {
592             // We don't have valid OS version info, fetch it if we are connected
593             fetch = is_connected;
594         }
595 
596         if (fetch)
597         {
598             m_system_arch = GetRemoteSystemArchitecture ();
599             m_system_arch_set_while_connected = m_system_arch.IsValid();
600         }
601     }
602     return m_system_arch;
603 }
604 
605 
606 Error
607 Platform::ConnectRemote (Args& args)
608 {
609     Error error;
610     if (IsHost())
611         error.SetErrorStringWithFormat ("The currently selected platform (%s) is the host platform and is always connected.", GetPluginName().GetCString());
612     else
613         error.SetErrorStringWithFormat ("Platform::ConnectRemote() is not supported by %s", GetPluginName().GetCString());
614     return error;
615 }
616 
617 Error
618 Platform::DisconnectRemote ()
619 {
620     Error error;
621     if (IsHost())
622         error.SetErrorStringWithFormat ("The currently selected platform (%s) is the host platform and is always connected.", GetPluginName().GetCString());
623     else
624         error.SetErrorStringWithFormat ("Platform::DisconnectRemote() is not supported by %s", GetPluginName().GetCString());
625     return error;
626 }
627 
628 bool
629 Platform::GetProcessInfo (lldb::pid_t pid, ProcessInstanceInfo &process_info)
630 {
631     // Take care of the host case so that each subclass can just
632     // call this function to get the host functionality.
633     if (IsHost())
634         return Host::GetProcessInfo (pid, process_info);
635     return false;
636 }
637 
638 uint32_t
639 Platform::FindProcesses (const ProcessInstanceInfoMatch &match_info,
640                          ProcessInstanceInfoList &process_infos)
641 {
642     // Take care of the host case so that each subclass can just
643     // call this function to get the host functionality.
644     uint32_t match_count = 0;
645     if (IsHost())
646         match_count = Host::FindProcesses (match_info, process_infos);
647     return match_count;
648 }
649 
650 
651 Error
652 Platform::LaunchProcess (ProcessLaunchInfo &launch_info)
653 {
654     Error error;
655     // Take care of the host case so that each subclass can just
656     // call this function to get the host functionality.
657     if (IsHost())
658     {
659         if (::getenv ("LLDB_LAUNCH_FLAG_LAUNCH_IN_TTY"))
660             launch_info.GetFlags().Set (eLaunchFlagLaunchInTTY);
661 
662         if (launch_info.GetFlags().Test (eLaunchFlagLaunchInShell))
663         {
664             const bool is_localhost = true;
665             const bool will_debug = launch_info.GetFlags().Test(eLaunchFlagDebug);
666             const bool first_arg_is_full_shell_command = false;
667             uint32_t num_resumes = GetResumeCountForLaunchInfo (launch_info);
668             if (!launch_info.ConvertArgumentsForLaunchingInShell (error,
669                                                                   is_localhost,
670                                                                   will_debug,
671                                                                   first_arg_is_full_shell_command,
672                                                                   num_resumes))
673                 return error;
674         }
675 
676         error = Host::LaunchProcess (launch_info);
677     }
678     else
679         error.SetErrorString ("base lldb_private::Platform class can't launch remote processes");
680     return error;
681 }
682 
683 lldb::ProcessSP
684 Platform::DebugProcess (ProcessLaunchInfo &launch_info,
685                         Debugger &debugger,
686                         Target *target,       // Can be NULL, if NULL create a new target, else use existing one
687                         Listener &listener,
688                         Error &error)
689 {
690     ProcessSP process_sp;
691     // Make sure we stop at the entry point
692     launch_info.GetFlags ().Set (eLaunchFlagDebug);
693     // We always launch the process we are going to debug in a separate process
694     // group, since then we can handle ^C interrupts ourselves w/o having to worry
695     // about the target getting them as well.
696     launch_info.SetLaunchInSeparateProcessGroup(true);
697 
698     error = LaunchProcess (launch_info);
699     if (error.Success())
700     {
701         if (launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID)
702         {
703             ProcessAttachInfo attach_info (launch_info);
704             process_sp = Attach (attach_info, debugger, target, listener, error);
705             if (process_sp)
706             {
707                 // Since we attached to the process, it will think it needs to detach
708                 // if the process object just goes away without an explicit call to
709                 // Process::Kill() or Process::Detach(), so let it know to kill the
710                 // process if this happens.
711                 process_sp->SetShouldDetach (false);
712 
713                 // If we didn't have any file actions, the pseudo terminal might
714                 // have been used where the slave side was given as the file to
715                 // open for stdin/out/err after we have already opened the master
716                 // so we can read/write stdin/out/err.
717                 int pty_fd = launch_info.GetPTY().ReleaseMasterFileDescriptor();
718                 if (pty_fd != lldb_utility::PseudoTerminal::invalid_fd)
719                 {
720                     process_sp->SetSTDIOFileDescriptor(pty_fd);
721                 }
722             }
723         }
724     }
725     return process_sp;
726 }
727 
728 
729 lldb::PlatformSP
730 Platform::GetPlatformForArchitecture (const ArchSpec &arch, ArchSpec *platform_arch_ptr)
731 {
732     lldb::PlatformSP platform_sp;
733     Error error;
734     if (arch.IsValid())
735         platform_sp = Platform::Create (arch, platform_arch_ptr, error);
736     return platform_sp;
737 }
738 
739 
740 //------------------------------------------------------------------
741 /// Lets a platform answer if it is compatible with a given
742 /// architecture and the target triple contained within.
743 //------------------------------------------------------------------
744 bool
745 Platform::IsCompatibleArchitecture (const ArchSpec &arch, bool exact_arch_match, ArchSpec *compatible_arch_ptr)
746 {
747     // If the architecture is invalid, we must answer true...
748     if (arch.IsValid())
749     {
750         ArchSpec platform_arch;
751         // Try for an exact architecture match first.
752         if (exact_arch_match)
753         {
754             for (uint32_t arch_idx=0; GetSupportedArchitectureAtIndex (arch_idx, platform_arch); ++arch_idx)
755             {
756                 if (arch.IsExactMatch(platform_arch))
757                 {
758                     if (compatible_arch_ptr)
759                         *compatible_arch_ptr = platform_arch;
760                     return true;
761                 }
762             }
763         }
764         else
765         {
766             for (uint32_t arch_idx=0; GetSupportedArchitectureAtIndex (arch_idx, platform_arch); ++arch_idx)
767             {
768                 if (arch.IsCompatibleMatch(platform_arch))
769                 {
770                     if (compatible_arch_ptr)
771                         *compatible_arch_ptr = platform_arch;
772                     return true;
773                 }
774             }
775         }
776     }
777     if (compatible_arch_ptr)
778         compatible_arch_ptr->Clear();
779     return false;
780 }
781 
782 uint32_t
783 Platform::MakeDirectory (const FileSpec &spec,
784                          mode_t mode)
785 {
786     std::string path(spec.GetPath());
787     return this->MakeDirectory(path,mode);
788 }
789 
790 Error
791 Platform::PutFile (const FileSpec& source,
792                    const FileSpec& destination,
793                    uint32_t uid,
794                    uint32_t gid)
795 {
796     Error error("unimplemented");
797     return error;
798 }
799 
800 Error
801 Platform::GetFile (const FileSpec& source,
802                    const FileSpec& destination)
803 {
804     Error error("unimplemented");
805     return error;
806 }
807 
808 bool
809 Platform::GetFileExists (const lldb_private::FileSpec& file_spec)
810 {
811     return false;
812 }
813 
814 lldb_private::Error
815 Platform::RunShellCommand (const char *command,           // Shouldn't be NULL
816                            const char *working_dir,       // Pass NULL to use the current working directory
817                            int *status_ptr,               // Pass NULL if you don't want the process exit status
818                            int *signo_ptr,                // Pass NULL if you don't want the signal that caused the process to exit
819                            std::string *command_output,   // Pass NULL if you don't want the command output
820                            uint32_t timeout_sec)          // Timeout in seconds to wait for shell program to finish
821 {
822     if (IsHost())
823         return Host::RunShellCommand (command, working_dir, status_ptr, signo_ptr, command_output, timeout_sec);
824     else
825         return Error("unimplemented");
826 }
827 
828 
829 bool
830 Platform::CalculateMD5 (const FileSpec& file_spec,
831                         uint64_t &low,
832                         uint64_t &high)
833 {
834     if (IsHost())
835         return Host::CalculateMD5(file_spec, low, high);
836     else
837         return false;
838 }
839 
840 void
841 Platform::SetLocalCacheDirectory (const char* local)
842 {
843     m_local_cache_directory.assign(local);
844 }
845 
846 const char*
847 Platform::GetLocalCacheDirectory ()
848 {
849     return m_local_cache_directory.c_str();
850 }
851 
852 static OptionDefinition
853 g_rsync_option_table[] =
854 {
855     {   LLDB_OPT_SET_ALL, false, "rsync"                  , 'r', OptionParser::eNoArgument,       NULL, 0, eArgTypeNone         , "Enable rsync." },
856     {   LLDB_OPT_SET_ALL, false, "rsync-opts"             , 'R', OptionParser::eRequiredArgument, NULL, 0, eArgTypeCommandName  , "Platform-specific options required for rsync to work." },
857     {   LLDB_OPT_SET_ALL, false, "rsync-prefix"           , 'P', OptionParser::eRequiredArgument, NULL, 0, eArgTypeCommandName  , "Platform-specific rsync prefix put before the remote path." },
858     {   LLDB_OPT_SET_ALL, false, "ignore-remote-hostname" , 'i', OptionParser::eNoArgument,       NULL, 0, eArgTypeNone         , "Do not automatically fill in the remote hostname when composing the rsync command." },
859 };
860 
861 static OptionDefinition
862 g_ssh_option_table[] =
863 {
864     {   LLDB_OPT_SET_ALL, false, "ssh"                    , 's', OptionParser::eNoArgument,       NULL, 0, eArgTypeNone         , "Enable SSH." },
865     {   LLDB_OPT_SET_ALL, false, "ssh-opts"               , 'S', OptionParser::eRequiredArgument, NULL, 0, eArgTypeCommandName  , "Platform-specific options required for SSH to work." },
866 };
867 
868 static OptionDefinition
869 g_caching_option_table[] =
870 {
871     {   LLDB_OPT_SET_ALL, false, "local-cache-dir"        , 'c', OptionParser::eRequiredArgument, NULL, 0, eArgTypePath         , "Path in which to store local copies of files." },
872 };
873 
874 OptionGroupPlatformRSync::OptionGroupPlatformRSync ()
875 {
876 }
877 
878 OptionGroupPlatformRSync::~OptionGroupPlatformRSync ()
879 {
880 }
881 
882 const lldb_private::OptionDefinition*
883 OptionGroupPlatformRSync::GetDefinitions ()
884 {
885     return g_rsync_option_table;
886 }
887 
888 void
889 OptionGroupPlatformRSync::OptionParsingStarting (CommandInterpreter &interpreter)
890 {
891     m_rsync = false;
892     m_rsync_opts.clear();
893     m_rsync_prefix.clear();
894     m_ignores_remote_hostname = false;
895 }
896 
897 lldb_private::Error
898 OptionGroupPlatformRSync::SetOptionValue (CommandInterpreter &interpreter,
899                 uint32_t option_idx,
900                 const char *option_arg)
901 {
902     Error error;
903     char short_option = (char) GetDefinitions()[option_idx].short_option;
904     switch (short_option)
905     {
906         case 'r':
907             m_rsync = true;
908             break;
909 
910         case 'R':
911             m_rsync_opts.assign(option_arg);
912             break;
913 
914         case 'P':
915             m_rsync_prefix.assign(option_arg);
916             break;
917 
918         case 'i':
919             m_ignores_remote_hostname = true;
920             break;
921 
922         default:
923             error.SetErrorStringWithFormat ("unrecognized option '%c'", short_option);
924             break;
925     }
926 
927     return error;
928 }
929 
930 uint32_t
931 OptionGroupPlatformRSync::GetNumDefinitions ()
932 {
933     return llvm::array_lengthof(g_rsync_option_table);
934 }
935 
936 lldb::BreakpointSP
937 Platform::SetThreadCreationBreakpoint (lldb_private::Target &target)
938 {
939     return lldb::BreakpointSP();
940 }
941 
942 OptionGroupPlatformSSH::OptionGroupPlatformSSH ()
943 {
944 }
945 
946 OptionGroupPlatformSSH::~OptionGroupPlatformSSH ()
947 {
948 }
949 
950 const lldb_private::OptionDefinition*
951 OptionGroupPlatformSSH::GetDefinitions ()
952 {
953     return g_ssh_option_table;
954 }
955 
956 void
957 OptionGroupPlatformSSH::OptionParsingStarting (CommandInterpreter &interpreter)
958 {
959     m_ssh = false;
960     m_ssh_opts.clear();
961 }
962 
963 lldb_private::Error
964 OptionGroupPlatformSSH::SetOptionValue (CommandInterpreter &interpreter,
965                                           uint32_t option_idx,
966                                           const char *option_arg)
967 {
968     Error error;
969     char short_option = (char) GetDefinitions()[option_idx].short_option;
970     switch (short_option)
971     {
972         case 's':
973             m_ssh = true;
974             break;
975 
976         case 'S':
977             m_ssh_opts.assign(option_arg);
978             break;
979 
980         default:
981             error.SetErrorStringWithFormat ("unrecognized option '%c'", short_option);
982             break;
983     }
984 
985     return error;
986 }
987 
988 uint32_t
989 OptionGroupPlatformSSH::GetNumDefinitions ()
990 {
991     return llvm::array_lengthof(g_ssh_option_table);
992 }
993 
994 OptionGroupPlatformCaching::OptionGroupPlatformCaching ()
995 {
996 }
997 
998 OptionGroupPlatformCaching::~OptionGroupPlatformCaching ()
999 {
1000 }
1001 
1002 const lldb_private::OptionDefinition*
1003 OptionGroupPlatformCaching::GetDefinitions ()
1004 {
1005     return g_caching_option_table;
1006 }
1007 
1008 void
1009 OptionGroupPlatformCaching::OptionParsingStarting (CommandInterpreter &interpreter)
1010 {
1011     m_cache_dir.clear();
1012 }
1013 
1014 lldb_private::Error
1015 OptionGroupPlatformCaching::SetOptionValue (CommandInterpreter &interpreter,
1016                                         uint32_t option_idx,
1017                                         const char *option_arg)
1018 {
1019     Error error;
1020     char short_option = (char) GetDefinitions()[option_idx].short_option;
1021     switch (short_option)
1022     {
1023         case 'c':
1024             m_cache_dir.assign(option_arg);
1025             break;
1026 
1027         default:
1028             error.SetErrorStringWithFormat ("unrecognized option '%c'", short_option);
1029             break;
1030     }
1031 
1032     return error;
1033 }
1034 
1035 uint32_t
1036 OptionGroupPlatformCaching::GetNumDefinitions ()
1037 {
1038     return llvm::array_lengthof(g_caching_option_table);
1039 }
1040 
1041 size_t
1042 Platform::GetEnvironment (StringList &environment)
1043 {
1044     environment.Clear();
1045     return false;
1046 }
1047