xref: /freebsd/contrib/llvm-project/lldb/source/Core/PluginManager.cpp (revision 911f0260390e18cf85f3dbf2c719b593efdc1e3c) 
1 //===-- PluginManager.cpp -------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "lldb/Core/PluginManager.h"
10 
11 #include "lldb/Core/Debugger.h"
12 #include "lldb/Host/FileSystem.h"
13 #include "lldb/Host/HostInfo.h"
14 #include "lldb/Interpreter/OptionValueProperties.h"
15 #include "lldb/Target/Process.h"
16 #include "lldb/Utility/ConstString.h"
17 #include "lldb/Utility/FileSpec.h"
18 #include "lldb/Utility/Status.h"
19 #include "lldb/Utility/StringList.h"
20 #include "llvm/ADT/StringRef.h"
21 #include "llvm/Support/DynamicLibrary.h"
22 #include "llvm/Support/FileSystem.h"
23 #include "llvm/Support/raw_ostream.h"
24 #include <cassert>
25 #include <map>
26 #include <memory>
27 #include <mutex>
28 #include <string>
29 #include <utility>
30 #include <vector>
31 #if defined(_WIN32)
32 #include "lldb/Host/windows/PosixApi.h"
33 #endif
34 
35 using namespace lldb;
36 using namespace lldb_private;
37 
38 typedef bool (*PluginInitCallback)();
39 typedef void (*PluginTermCallback)();
40 
41 struct PluginInfo {
42   PluginInfo() = default;
43 
44   llvm::sys::DynamicLibrary library;
45   PluginInitCallback plugin_init_callback = nullptr;
46   PluginTermCallback plugin_term_callback = nullptr;
47 };
48 
49 typedef std::map<FileSpec, PluginInfo> PluginTerminateMap;
50 
51 static std::recursive_mutex &GetPluginMapMutex() {
52   static std::recursive_mutex g_plugin_map_mutex;
53   return g_plugin_map_mutex;
54 }
55 
56 static PluginTerminateMap &GetPluginMap() {
57   static PluginTerminateMap g_plugin_map;
58   return g_plugin_map;
59 }
60 
61 static bool PluginIsLoaded(const FileSpec &plugin_file_spec) {
62   std::lock_guard<std::recursive_mutex> guard(GetPluginMapMutex());
63   PluginTerminateMap &plugin_map = GetPluginMap();
64   return plugin_map.find(plugin_file_spec) != plugin_map.end();
65 }
66 
67 static void SetPluginInfo(const FileSpec &plugin_file_spec,
68                           const PluginInfo &plugin_info) {
69   std::lock_guard<std::recursive_mutex> guard(GetPluginMapMutex());
70   PluginTerminateMap &plugin_map = GetPluginMap();
71   assert(plugin_map.find(plugin_file_spec) == plugin_map.end());
72   plugin_map[plugin_file_spec] = plugin_info;
73 }
74 
75 template <typename FPtrTy> static FPtrTy CastToFPtr(void *VPtr) {
76   return reinterpret_cast<FPtrTy>(VPtr);
77 }
78 
79 static FileSystem::EnumerateDirectoryResult
80 LoadPluginCallback(void *baton, llvm::sys::fs::file_type ft,
81                    llvm::StringRef path) {
82   Status error;
83 
84   namespace fs = llvm::sys::fs;
85   // If we have a regular file, a symbolic link or unknown file type, try and
86   // process the file. We must handle unknown as sometimes the directory
87   // enumeration might be enumerating a file system that doesn't have correct
88   // file type information.
89   if (ft == fs::file_type::regular_file || ft == fs::file_type::symlink_file ||
90       ft == fs::file_type::type_unknown) {
91     FileSpec plugin_file_spec(path);
92     FileSystem::Instance().Resolve(plugin_file_spec);
93 
94     if (PluginIsLoaded(plugin_file_spec))
95       return FileSystem::eEnumerateDirectoryResultNext;
96     else {
97       PluginInfo plugin_info;
98 
99       std::string pluginLoadError;
100       plugin_info.library = llvm::sys::DynamicLibrary::getPermanentLibrary(
101           plugin_file_spec.GetPath().c_str(), &pluginLoadError);
102       if (plugin_info.library.isValid()) {
103         bool success = false;
104         plugin_info.plugin_init_callback = CastToFPtr<PluginInitCallback>(
105             plugin_info.library.getAddressOfSymbol("LLDBPluginInitialize"));
106         if (plugin_info.plugin_init_callback) {
107           // Call the plug-in "bool LLDBPluginInitialize(void)" function
108           success = plugin_info.plugin_init_callback();
109         }
110 
111         if (success) {
112           // It is ok for the "LLDBPluginTerminate" symbol to be nullptr
113           plugin_info.plugin_term_callback = CastToFPtr<PluginTermCallback>(
114               plugin_info.library.getAddressOfSymbol("LLDBPluginTerminate"));
115         } else {
116           // The initialize function returned FALSE which means the plug-in
117           // might not be compatible, or might be too new or too old, or might
118           // not want to run on this machine.  Set it to a default-constructed
119           // instance to invalidate it.
120           plugin_info = PluginInfo();
121         }
122 
123         // Regardless of success or failure, cache the plug-in load in our
124         // plug-in info so we don't try to load it again and again.
125         SetPluginInfo(plugin_file_spec, plugin_info);
126 
127         return FileSystem::eEnumerateDirectoryResultNext;
128       }
129     }
130   }
131 
132   if (ft == fs::file_type::directory_file ||
133       ft == fs::file_type::symlink_file || ft == fs::file_type::type_unknown) {
134     // Try and recurse into anything that a directory or symbolic link. We must
135     // also do this for unknown as sometimes the directory enumeration might be
136     // enumerating a file system that doesn't have correct file type
137     // information.
138     return FileSystem::eEnumerateDirectoryResultEnter;
139   }
140 
141   return FileSystem::eEnumerateDirectoryResultNext;
142 }
143 
144 void PluginManager::Initialize() {
145   const bool find_directories = true;
146   const bool find_files = true;
147   const bool find_other = true;
148   char dir_path[PATH_MAX];
149   if (FileSpec dir_spec = HostInfo::GetSystemPluginDir()) {
150     if (FileSystem::Instance().Exists(dir_spec) &&
151         dir_spec.GetPath(dir_path, sizeof(dir_path))) {
152       FileSystem::Instance().EnumerateDirectory(dir_path, find_directories,
153                                                 find_files, find_other,
154                                                 LoadPluginCallback, nullptr);
155     }
156   }
157 
158   if (FileSpec dir_spec = HostInfo::GetUserPluginDir()) {
159     if (FileSystem::Instance().Exists(dir_spec) &&
160         dir_spec.GetPath(dir_path, sizeof(dir_path))) {
161       FileSystem::Instance().EnumerateDirectory(dir_path, find_directories,
162                                                 find_files, find_other,
163                                                 LoadPluginCallback, nullptr);
164     }
165   }
166 }
167 
168 void PluginManager::Terminate() {
169   std::lock_guard<std::recursive_mutex> guard(GetPluginMapMutex());
170   PluginTerminateMap &plugin_map = GetPluginMap();
171 
172   PluginTerminateMap::const_iterator pos, end = plugin_map.end();
173   for (pos = plugin_map.begin(); pos != end; ++pos) {
174     // Call the plug-in "void LLDBPluginTerminate (void)" function if there is
175     // one (if the symbol was not nullptr).
176     if (pos->second.library.isValid()) {
177       if (pos->second.plugin_term_callback)
178         pos->second.plugin_term_callback();
179     }
180   }
181   plugin_map.clear();
182 }
183 
184 template <typename Callback> struct PluginInstance {
185   typedef Callback CallbackType;
186 
187   PluginInstance() = default;
188   PluginInstance(llvm::StringRef name, llvm::StringRef description,
189                  Callback create_callback,
190                  DebuggerInitializeCallback debugger_init_callback = nullptr)
191       : name(name), description(description), create_callback(create_callback),
192         debugger_init_callback(debugger_init_callback) {}
193 
194   llvm::StringRef name;
195   llvm::StringRef description;
196   Callback create_callback;
197   DebuggerInitializeCallback debugger_init_callback;
198 };
199 
200 template <typename Instance> class PluginInstances {
201 public:
202   template <typename... Args>
203   bool RegisterPlugin(llvm::StringRef name, llvm::StringRef description,
204                       typename Instance::CallbackType callback,
205                       Args &&...args) {
206     if (!callback)
207       return false;
208     assert(!name.empty());
209     Instance instance =
210         Instance(name, description, callback, std::forward<Args>(args)...);
211     m_instances.push_back(instance);
212     return false;
213   }
214 
215   bool UnregisterPlugin(typename Instance::CallbackType callback) {
216     if (!callback)
217       return false;
218     auto pos = m_instances.begin();
219     auto end = m_instances.end();
220     for (; pos != end; ++pos) {
221       if (pos->create_callback == callback) {
222         m_instances.erase(pos);
223         return true;
224       }
225     }
226     return false;
227   }
228 
229   typename Instance::CallbackType GetCallbackAtIndex(uint32_t idx) {
230     if (Instance *instance = GetInstanceAtIndex(idx))
231       return instance->create_callback;
232     return nullptr;
233   }
234 
235   llvm::StringRef GetDescriptionAtIndex(uint32_t idx) {
236     if (Instance *instance = GetInstanceAtIndex(idx))
237       return instance->description;
238     return "";
239   }
240 
241   llvm::StringRef GetNameAtIndex(uint32_t idx) {
242     if (Instance *instance = GetInstanceAtIndex(idx))
243       return instance->name;
244     return "";
245   }
246 
247   typename Instance::CallbackType GetCallbackForName(llvm::StringRef name) {
248     if (name.empty())
249       return nullptr;
250     for (auto &instance : m_instances) {
251       if (name == instance.name)
252         return instance.create_callback;
253     }
254     return nullptr;
255   }
256 
257   void PerformDebuggerCallback(Debugger &debugger) {
258     for (auto &instance : m_instances) {
259       if (instance.debugger_init_callback)
260         instance.debugger_init_callback(debugger);
261     }
262   }
263 
264   const std::vector<Instance> &GetInstances() const { return m_instances; }
265   std::vector<Instance> &GetInstances() { return m_instances; }
266 
267   Instance *GetInstanceAtIndex(uint32_t idx) {
268     if (idx < m_instances.size())
269       return &m_instances[idx];
270     return nullptr;
271   }
272 
273 private:
274   std::vector<Instance> m_instances;
275 };
276 
277 #pragma mark ABI
278 
279 typedef PluginInstance<ABICreateInstance> ABIInstance;
280 typedef PluginInstances<ABIInstance> ABIInstances;
281 
282 static ABIInstances &GetABIInstances() {
283   static ABIInstances g_instances;
284   return g_instances;
285 }
286 
287 bool PluginManager::RegisterPlugin(llvm::StringRef name,
288                                    llvm::StringRef description,
289                                    ABICreateInstance create_callback) {
290   return GetABIInstances().RegisterPlugin(name, description, create_callback);
291 }
292 
293 bool PluginManager::UnregisterPlugin(ABICreateInstance create_callback) {
294   return GetABIInstances().UnregisterPlugin(create_callback);
295 }
296 
297 ABICreateInstance PluginManager::GetABICreateCallbackAtIndex(uint32_t idx) {
298   return GetABIInstances().GetCallbackAtIndex(idx);
299 }
300 
301 #pragma mark Architecture
302 
303 typedef PluginInstance<ArchitectureCreateInstance> ArchitectureInstance;
304 typedef std::vector<ArchitectureInstance> ArchitectureInstances;
305 
306 static ArchitectureInstances &GetArchitectureInstances() {
307   static ArchitectureInstances g_instances;
308   return g_instances;
309 }
310 
311 void PluginManager::RegisterPlugin(llvm::StringRef name,
312                                    llvm::StringRef description,
313                                    ArchitectureCreateInstance create_callback) {
314   GetArchitectureInstances().push_back({name, description, create_callback});
315 }
316 
317 void PluginManager::UnregisterPlugin(
318     ArchitectureCreateInstance create_callback) {
319   auto &instances = GetArchitectureInstances();
320 
321   for (auto pos = instances.begin(), end = instances.end(); pos != end; ++pos) {
322     if (pos->create_callback == create_callback) {
323       instances.erase(pos);
324       return;
325     }
326   }
327   llvm_unreachable("Plugin not found");
328 }
329 
330 std::unique_ptr<Architecture>
331 PluginManager::CreateArchitectureInstance(const ArchSpec &arch) {
332   for (const auto &instances : GetArchitectureInstances()) {
333     if (auto plugin_up = instances.create_callback(arch))
334       return plugin_up;
335   }
336   return nullptr;
337 }
338 
339 #pragma mark Disassembler
340 
341 typedef PluginInstance<DisassemblerCreateInstance> DisassemblerInstance;
342 typedef PluginInstances<DisassemblerInstance> DisassemblerInstances;
343 
344 static DisassemblerInstances &GetDisassemblerInstances() {
345   static DisassemblerInstances g_instances;
346   return g_instances;
347 }
348 
349 bool PluginManager::RegisterPlugin(llvm::StringRef name,
350                                    llvm::StringRef description,
351                                    DisassemblerCreateInstance create_callback) {
352   return GetDisassemblerInstances().RegisterPlugin(name, description,
353                                                    create_callback);
354 }
355 
356 bool PluginManager::UnregisterPlugin(
357     DisassemblerCreateInstance create_callback) {
358   return GetDisassemblerInstances().UnregisterPlugin(create_callback);
359 }
360 
361 DisassemblerCreateInstance
362 PluginManager::GetDisassemblerCreateCallbackAtIndex(uint32_t idx) {
363   return GetDisassemblerInstances().GetCallbackAtIndex(idx);
364 }
365 
366 DisassemblerCreateInstance
367 PluginManager::GetDisassemblerCreateCallbackForPluginName(
368     llvm::StringRef name) {
369   return GetDisassemblerInstances().GetCallbackForName(name);
370 }
371 
372 #pragma mark DynamicLoader
373 
374 typedef PluginInstance<DynamicLoaderCreateInstance> DynamicLoaderInstance;
375 typedef PluginInstances<DynamicLoaderInstance> DynamicLoaderInstances;
376 
377 static DynamicLoaderInstances &GetDynamicLoaderInstances() {
378   static DynamicLoaderInstances g_instances;
379   return g_instances;
380 }
381 
382 bool PluginManager::RegisterPlugin(
383     llvm::StringRef name, llvm::StringRef description,
384     DynamicLoaderCreateInstance create_callback,
385     DebuggerInitializeCallback debugger_init_callback) {
386   return GetDynamicLoaderInstances().RegisterPlugin(
387       name, description, create_callback, debugger_init_callback);
388 }
389 
390 bool PluginManager::UnregisterPlugin(
391     DynamicLoaderCreateInstance create_callback) {
392   return GetDynamicLoaderInstances().UnregisterPlugin(create_callback);
393 }
394 
395 DynamicLoaderCreateInstance
396 PluginManager::GetDynamicLoaderCreateCallbackAtIndex(uint32_t idx) {
397   return GetDynamicLoaderInstances().GetCallbackAtIndex(idx);
398 }
399 
400 DynamicLoaderCreateInstance
401 PluginManager::GetDynamicLoaderCreateCallbackForPluginName(
402     llvm::StringRef name) {
403   return GetDynamicLoaderInstances().GetCallbackForName(name);
404 }
405 
406 #pragma mark JITLoader
407 
408 typedef PluginInstance<JITLoaderCreateInstance> JITLoaderInstance;
409 typedef PluginInstances<JITLoaderInstance> JITLoaderInstances;
410 
411 static JITLoaderInstances &GetJITLoaderInstances() {
412   static JITLoaderInstances g_instances;
413   return g_instances;
414 }
415 
416 bool PluginManager::RegisterPlugin(
417     llvm::StringRef name, llvm::StringRef description,
418     JITLoaderCreateInstance create_callback,
419     DebuggerInitializeCallback debugger_init_callback) {
420   return GetJITLoaderInstances().RegisterPlugin(
421       name, description, create_callback, debugger_init_callback);
422 }
423 
424 bool PluginManager::UnregisterPlugin(JITLoaderCreateInstance create_callback) {
425   return GetJITLoaderInstances().UnregisterPlugin(create_callback);
426 }
427 
428 JITLoaderCreateInstance
429 PluginManager::GetJITLoaderCreateCallbackAtIndex(uint32_t idx) {
430   return GetJITLoaderInstances().GetCallbackAtIndex(idx);
431 }
432 
433 #pragma mark EmulateInstruction
434 
435 typedef PluginInstance<EmulateInstructionCreateInstance>
436     EmulateInstructionInstance;
437 typedef PluginInstances<EmulateInstructionInstance> EmulateInstructionInstances;
438 
439 static EmulateInstructionInstances &GetEmulateInstructionInstances() {
440   static EmulateInstructionInstances g_instances;
441   return g_instances;
442 }
443 
444 bool PluginManager::RegisterPlugin(
445     llvm::StringRef name, llvm::StringRef description,
446     EmulateInstructionCreateInstance create_callback) {
447   return GetEmulateInstructionInstances().RegisterPlugin(name, description,
448                                                          create_callback);
449 }
450 
451 bool PluginManager::UnregisterPlugin(
452     EmulateInstructionCreateInstance create_callback) {
453   return GetEmulateInstructionInstances().UnregisterPlugin(create_callback);
454 }
455 
456 EmulateInstructionCreateInstance
457 PluginManager::GetEmulateInstructionCreateCallbackAtIndex(uint32_t idx) {
458   return GetEmulateInstructionInstances().GetCallbackAtIndex(idx);
459 }
460 
461 EmulateInstructionCreateInstance
462 PluginManager::GetEmulateInstructionCreateCallbackForPluginName(
463     llvm::StringRef name) {
464   return GetEmulateInstructionInstances().GetCallbackForName(name);
465 }
466 
467 #pragma mark OperatingSystem
468 
469 typedef PluginInstance<OperatingSystemCreateInstance> OperatingSystemInstance;
470 typedef PluginInstances<OperatingSystemInstance> OperatingSystemInstances;
471 
472 static OperatingSystemInstances &GetOperatingSystemInstances() {
473   static OperatingSystemInstances g_instances;
474   return g_instances;
475 }
476 
477 bool PluginManager::RegisterPlugin(
478     llvm::StringRef name, llvm::StringRef description,
479     OperatingSystemCreateInstance create_callback,
480     DebuggerInitializeCallback debugger_init_callback) {
481   return GetOperatingSystemInstances().RegisterPlugin(
482       name, description, create_callback, debugger_init_callback);
483 }
484 
485 bool PluginManager::UnregisterPlugin(
486     OperatingSystemCreateInstance create_callback) {
487   return GetOperatingSystemInstances().UnregisterPlugin(create_callback);
488 }
489 
490 OperatingSystemCreateInstance
491 PluginManager::GetOperatingSystemCreateCallbackAtIndex(uint32_t idx) {
492   return GetOperatingSystemInstances().GetCallbackAtIndex(idx);
493 }
494 
495 OperatingSystemCreateInstance
496 PluginManager::GetOperatingSystemCreateCallbackForPluginName(
497     llvm::StringRef name) {
498   return GetOperatingSystemInstances().GetCallbackForName(name);
499 }
500 
501 #pragma mark Language
502 
503 typedef PluginInstance<LanguageCreateInstance> LanguageInstance;
504 typedef PluginInstances<LanguageInstance> LanguageInstances;
505 
506 static LanguageInstances &GetLanguageInstances() {
507   static LanguageInstances g_instances;
508   return g_instances;
509 }
510 
511 bool PluginManager::RegisterPlugin(llvm::StringRef name,
512                                    llvm::StringRef description,
513                                    LanguageCreateInstance create_callback) {
514   return GetLanguageInstances().RegisterPlugin(name, description,
515                                                create_callback);
516 }
517 
518 bool PluginManager::UnregisterPlugin(LanguageCreateInstance create_callback) {
519   return GetLanguageInstances().UnregisterPlugin(create_callback);
520 }
521 
522 LanguageCreateInstance
523 PluginManager::GetLanguageCreateCallbackAtIndex(uint32_t idx) {
524   return GetLanguageInstances().GetCallbackAtIndex(idx);
525 }
526 
527 #pragma mark LanguageRuntime
528 
529 struct LanguageRuntimeInstance
530     : public PluginInstance<LanguageRuntimeCreateInstance> {
531   LanguageRuntimeInstance(
532       llvm::StringRef name, llvm::StringRef description,
533       CallbackType create_callback,
534       DebuggerInitializeCallback debugger_init_callback,
535       LanguageRuntimeGetCommandObject command_callback,
536       LanguageRuntimeGetExceptionPrecondition precondition_callback)
537       : PluginInstance<LanguageRuntimeCreateInstance>(
538             name, description, create_callback, debugger_init_callback),
539         command_callback(command_callback),
540         precondition_callback(precondition_callback) {}
541 
542   LanguageRuntimeGetCommandObject command_callback;
543   LanguageRuntimeGetExceptionPrecondition precondition_callback;
544 };
545 
546 typedef PluginInstances<LanguageRuntimeInstance> LanguageRuntimeInstances;
547 
548 static LanguageRuntimeInstances &GetLanguageRuntimeInstances() {
549   static LanguageRuntimeInstances g_instances;
550   return g_instances;
551 }
552 
553 bool PluginManager::RegisterPlugin(
554     llvm::StringRef name, llvm::StringRef description,
555     LanguageRuntimeCreateInstance create_callback,
556     LanguageRuntimeGetCommandObject command_callback,
557     LanguageRuntimeGetExceptionPrecondition precondition_callback) {
558   return GetLanguageRuntimeInstances().RegisterPlugin(
559       name, description, create_callback, nullptr, command_callback,
560       precondition_callback);
561 }
562 
563 bool PluginManager::UnregisterPlugin(
564     LanguageRuntimeCreateInstance create_callback) {
565   return GetLanguageRuntimeInstances().UnregisterPlugin(create_callback);
566 }
567 
568 LanguageRuntimeCreateInstance
569 PluginManager::GetLanguageRuntimeCreateCallbackAtIndex(uint32_t idx) {
570   return GetLanguageRuntimeInstances().GetCallbackAtIndex(idx);
571 }
572 
573 LanguageRuntimeGetCommandObject
574 PluginManager::GetLanguageRuntimeGetCommandObjectAtIndex(uint32_t idx) {
575   const auto &instances = GetLanguageRuntimeInstances().GetInstances();
576   if (idx < instances.size())
577     return instances[idx].command_callback;
578   return nullptr;
579 }
580 
581 LanguageRuntimeGetExceptionPrecondition
582 PluginManager::GetLanguageRuntimeGetExceptionPreconditionAtIndex(uint32_t idx) {
583   const auto &instances = GetLanguageRuntimeInstances().GetInstances();
584   if (idx < instances.size())
585     return instances[idx].precondition_callback;
586   return nullptr;
587 }
588 
589 #pragma mark SystemRuntime
590 
591 typedef PluginInstance<SystemRuntimeCreateInstance> SystemRuntimeInstance;
592 typedef PluginInstances<SystemRuntimeInstance> SystemRuntimeInstances;
593 
594 static SystemRuntimeInstances &GetSystemRuntimeInstances() {
595   static SystemRuntimeInstances g_instances;
596   return g_instances;
597 }
598 
599 bool PluginManager::RegisterPlugin(
600     llvm::StringRef name, llvm::StringRef description,
601     SystemRuntimeCreateInstance create_callback) {
602   return GetSystemRuntimeInstances().RegisterPlugin(name, description,
603                                                     create_callback);
604 }
605 
606 bool PluginManager::UnregisterPlugin(
607     SystemRuntimeCreateInstance create_callback) {
608   return GetSystemRuntimeInstances().UnregisterPlugin(create_callback);
609 }
610 
611 SystemRuntimeCreateInstance
612 PluginManager::GetSystemRuntimeCreateCallbackAtIndex(uint32_t idx) {
613   return GetSystemRuntimeInstances().GetCallbackAtIndex(idx);
614 }
615 
616 #pragma mark ObjectFile
617 
618 struct ObjectFileInstance : public PluginInstance<ObjectFileCreateInstance> {
619   ObjectFileInstance(
620       llvm::StringRef name, llvm::StringRef description,
621       CallbackType create_callback,
622       ObjectFileCreateMemoryInstance create_memory_callback,
623       ObjectFileGetModuleSpecifications get_module_specifications,
624       ObjectFileSaveCore save_core,
625       DebuggerInitializeCallback debugger_init_callback)
626       : PluginInstance<ObjectFileCreateInstance>(
627             name, description, create_callback, debugger_init_callback),
628         create_memory_callback(create_memory_callback),
629         get_module_specifications(get_module_specifications),
630         save_core(save_core) {}
631 
632   ObjectFileCreateMemoryInstance create_memory_callback;
633   ObjectFileGetModuleSpecifications get_module_specifications;
634   ObjectFileSaveCore save_core;
635 };
636 typedef PluginInstances<ObjectFileInstance> ObjectFileInstances;
637 
638 static ObjectFileInstances &GetObjectFileInstances() {
639   static ObjectFileInstances g_instances;
640   return g_instances;
641 }
642 
643 bool PluginManager::RegisterPlugin(
644     llvm::StringRef name, llvm::StringRef description,
645     ObjectFileCreateInstance create_callback,
646     ObjectFileCreateMemoryInstance create_memory_callback,
647     ObjectFileGetModuleSpecifications get_module_specifications,
648     ObjectFileSaveCore save_core,
649     DebuggerInitializeCallback debugger_init_callback) {
650   return GetObjectFileInstances().RegisterPlugin(
651       name, description, create_callback, create_memory_callback,
652       get_module_specifications, save_core, debugger_init_callback);
653 }
654 
655 bool PluginManager::UnregisterPlugin(ObjectFileCreateInstance create_callback) {
656   return GetObjectFileInstances().UnregisterPlugin(create_callback);
657 }
658 
659 ObjectFileCreateInstance
660 PluginManager::GetObjectFileCreateCallbackAtIndex(uint32_t idx) {
661   return GetObjectFileInstances().GetCallbackAtIndex(idx);
662 }
663 
664 ObjectFileCreateMemoryInstance
665 PluginManager::GetObjectFileCreateMemoryCallbackAtIndex(uint32_t idx) {
666   const auto &instances = GetObjectFileInstances().GetInstances();
667   if (idx < instances.size())
668     return instances[idx].create_memory_callback;
669   return nullptr;
670 }
671 
672 ObjectFileGetModuleSpecifications
673 PluginManager::GetObjectFileGetModuleSpecificationsCallbackAtIndex(
674     uint32_t idx) {
675   const auto &instances = GetObjectFileInstances().GetInstances();
676   if (idx < instances.size())
677     return instances[idx].get_module_specifications;
678   return nullptr;
679 }
680 
681 ObjectFileCreateMemoryInstance
682 PluginManager::GetObjectFileCreateMemoryCallbackForPluginName(
683     llvm::StringRef name) {
684   const auto &instances = GetObjectFileInstances().GetInstances();
685   for (auto &instance : instances) {
686     if (instance.name == name)
687       return instance.create_memory_callback;
688   }
689   return nullptr;
690 }
691 
692 Status PluginManager::SaveCore(const lldb::ProcessSP &process_sp,
693                                const FileSpec &outfile,
694                                lldb::SaveCoreStyle &core_style,
695                                llvm::StringRef plugin_name) {
696   if (plugin_name.empty()) {
697     // Try saving core directly from the process plugin first.
698     llvm::Expected<bool> ret = process_sp->SaveCore(outfile.GetPath());
699     if (!ret)
700       return Status(ret.takeError());
701     if (ret.get())
702       return Status();
703   }
704 
705   // Fall back to object plugins.
706   Status error;
707   auto &instances = GetObjectFileInstances().GetInstances();
708   for (auto &instance : instances) {
709     if (plugin_name.empty() || instance.name == plugin_name) {
710       if (instance.save_core &&
711           instance.save_core(process_sp, outfile, core_style, error))
712         return error;
713     }
714   }
715   error.SetErrorString(
716       "no ObjectFile plugins were able to save a core for this process");
717   return error;
718 }
719 
720 #pragma mark ObjectContainer
721 
722 struct ObjectContainerInstance
723     : public PluginInstance<ObjectContainerCreateInstance> {
724   ObjectContainerInstance(
725       llvm::StringRef name, llvm::StringRef description,
726       CallbackType create_callback,
727       ObjectContainerCreateMemoryInstance create_memory_callback,
728       ObjectFileGetModuleSpecifications get_module_specifications)
729       : PluginInstance<ObjectContainerCreateInstance>(name, description,
730                                                       create_callback),
731         create_memory_callback(create_memory_callback),
732         get_module_specifications(get_module_specifications) {}
733 
734   ObjectContainerCreateMemoryInstance create_memory_callback;
735   ObjectFileGetModuleSpecifications get_module_specifications;
736 };
737 typedef PluginInstances<ObjectContainerInstance> ObjectContainerInstances;
738 
739 static ObjectContainerInstances &GetObjectContainerInstances() {
740   static ObjectContainerInstances g_instances;
741   return g_instances;
742 }
743 
744 bool PluginManager::RegisterPlugin(
745     llvm::StringRef name, llvm::StringRef description,
746     ObjectContainerCreateInstance create_callback,
747     ObjectFileGetModuleSpecifications get_module_specifications,
748     ObjectContainerCreateMemoryInstance create_memory_callback) {
749   return GetObjectContainerInstances().RegisterPlugin(
750       name, description, create_callback, create_memory_callback,
751       get_module_specifications);
752 }
753 
754 bool PluginManager::UnregisterPlugin(
755     ObjectContainerCreateInstance create_callback) {
756   return GetObjectContainerInstances().UnregisterPlugin(create_callback);
757 }
758 
759 ObjectContainerCreateInstance
760 PluginManager::GetObjectContainerCreateCallbackAtIndex(uint32_t idx) {
761   return GetObjectContainerInstances().GetCallbackAtIndex(idx);
762 }
763 
764 ObjectContainerCreateMemoryInstance
765 PluginManager::GetObjectContainerCreateMemoryCallbackAtIndex(uint32_t idx) {
766   const auto &instances = GetObjectContainerInstances().GetInstances();
767   if (idx < instances.size())
768     return instances[idx].create_memory_callback;
769   return nullptr;
770 }
771 
772 ObjectFileGetModuleSpecifications
773 PluginManager::GetObjectContainerGetModuleSpecificationsCallbackAtIndex(
774     uint32_t idx) {
775   const auto &instances = GetObjectContainerInstances().GetInstances();
776   if (idx < instances.size())
777     return instances[idx].get_module_specifications;
778   return nullptr;
779 }
780 
781 #pragma mark Platform
782 
783 typedef PluginInstance<PlatformCreateInstance> PlatformInstance;
784 typedef PluginInstances<PlatformInstance> PlatformInstances;
785 
786 static PlatformInstances &GetPlatformInstances() {
787   static PlatformInstances g_platform_instances;
788   return g_platform_instances;
789 }
790 
791 bool PluginManager::RegisterPlugin(
792     llvm::StringRef name, llvm::StringRef description,
793     PlatformCreateInstance create_callback,
794     DebuggerInitializeCallback debugger_init_callback) {
795   return GetPlatformInstances().RegisterPlugin(
796       name, description, create_callback, debugger_init_callback);
797 }
798 
799 bool PluginManager::UnregisterPlugin(PlatformCreateInstance create_callback) {
800   return GetPlatformInstances().UnregisterPlugin(create_callback);
801 }
802 
803 llvm::StringRef PluginManager::GetPlatformPluginNameAtIndex(uint32_t idx) {
804   return GetPlatformInstances().GetNameAtIndex(idx);
805 }
806 
807 llvm::StringRef
808 PluginManager::GetPlatformPluginDescriptionAtIndex(uint32_t idx) {
809   return GetPlatformInstances().GetDescriptionAtIndex(idx);
810 }
811 
812 PlatformCreateInstance
813 PluginManager::GetPlatformCreateCallbackAtIndex(uint32_t idx) {
814   return GetPlatformInstances().GetCallbackAtIndex(idx);
815 }
816 
817 PlatformCreateInstance
818 PluginManager::GetPlatformCreateCallbackForPluginName(llvm::StringRef name) {
819   return GetPlatformInstances().GetCallbackForName(name);
820 }
821 
822 void PluginManager::AutoCompletePlatformName(llvm::StringRef name,
823                                              CompletionRequest &request) {
824   for (const auto &instance : GetPlatformInstances().GetInstances()) {
825     if (instance.name.startswith(name))
826       request.AddCompletion(instance.name);
827   }
828 }
829 
830 #pragma mark Process
831 
832 typedef PluginInstance<ProcessCreateInstance> ProcessInstance;
833 typedef PluginInstances<ProcessInstance> ProcessInstances;
834 
835 static ProcessInstances &GetProcessInstances() {
836   static ProcessInstances g_instances;
837   return g_instances;
838 }
839 
840 bool PluginManager::RegisterPlugin(
841     llvm::StringRef name, llvm::StringRef description,
842     ProcessCreateInstance create_callback,
843     DebuggerInitializeCallback debugger_init_callback) {
844   return GetProcessInstances().RegisterPlugin(
845       name, description, create_callback, debugger_init_callback);
846 }
847 
848 bool PluginManager::UnregisterPlugin(ProcessCreateInstance create_callback) {
849   return GetProcessInstances().UnregisterPlugin(create_callback);
850 }
851 
852 llvm::StringRef PluginManager::GetProcessPluginNameAtIndex(uint32_t idx) {
853   return GetProcessInstances().GetNameAtIndex(idx);
854 }
855 
856 llvm::StringRef PluginManager::GetProcessPluginDescriptionAtIndex(uint32_t idx) {
857   return GetProcessInstances().GetDescriptionAtIndex(idx);
858 }
859 
860 ProcessCreateInstance
861 PluginManager::GetProcessCreateCallbackAtIndex(uint32_t idx) {
862   return GetProcessInstances().GetCallbackAtIndex(idx);
863 }
864 
865 ProcessCreateInstance
866 PluginManager::GetProcessCreateCallbackForPluginName(llvm::StringRef name) {
867   return GetProcessInstances().GetCallbackForName(name);
868 }
869 
870 void PluginManager::AutoCompleteProcessName(llvm::StringRef name,
871                                             CompletionRequest &request) {
872   for (const auto &instance : GetProcessInstances().GetInstances()) {
873     if (instance.name.startswith(name))
874       request.AddCompletion(instance.name, instance.description);
875   }
876 }
877 
878 #pragma mark ScriptInterpreter
879 
880 struct ScriptInterpreterInstance
881     : public PluginInstance<ScriptInterpreterCreateInstance> {
882   ScriptInterpreterInstance(llvm::StringRef name, llvm::StringRef description,
883                             CallbackType create_callback,
884                             lldb::ScriptLanguage language)
885       : PluginInstance<ScriptInterpreterCreateInstance>(name, description,
886                                                         create_callback),
887         language(language) {}
888 
889   lldb::ScriptLanguage language = lldb::eScriptLanguageNone;
890 };
891 
892 typedef PluginInstances<ScriptInterpreterInstance> ScriptInterpreterInstances;
893 
894 static ScriptInterpreterInstances &GetScriptInterpreterInstances() {
895   static ScriptInterpreterInstances g_instances;
896   return g_instances;
897 }
898 
899 bool PluginManager::RegisterPlugin(
900     llvm::StringRef name, llvm::StringRef description,
901     lldb::ScriptLanguage script_language,
902     ScriptInterpreterCreateInstance create_callback) {
903   return GetScriptInterpreterInstances().RegisterPlugin(
904       name, description, create_callback, script_language);
905 }
906 
907 bool PluginManager::UnregisterPlugin(
908     ScriptInterpreterCreateInstance create_callback) {
909   return GetScriptInterpreterInstances().UnregisterPlugin(create_callback);
910 }
911 
912 ScriptInterpreterCreateInstance
913 PluginManager::GetScriptInterpreterCreateCallbackAtIndex(uint32_t idx) {
914   return GetScriptInterpreterInstances().GetCallbackAtIndex(idx);
915 }
916 
917 lldb::ScriptInterpreterSP
918 PluginManager::GetScriptInterpreterForLanguage(lldb::ScriptLanguage script_lang,
919                                                Debugger &debugger) {
920   const auto &instances = GetScriptInterpreterInstances().GetInstances();
921   ScriptInterpreterCreateInstance none_instance = nullptr;
922   for (const auto &instance : instances) {
923     if (instance.language == lldb::eScriptLanguageNone)
924       none_instance = instance.create_callback;
925 
926     if (script_lang == instance.language)
927       return instance.create_callback(debugger);
928   }
929 
930   // If we didn't find one, return the ScriptInterpreter for the null language.
931   assert(none_instance != nullptr);
932   return none_instance(debugger);
933 }
934 
935 #pragma mark StructuredDataPlugin
936 
937 struct StructuredDataPluginInstance
938     : public PluginInstance<StructuredDataPluginCreateInstance> {
939   StructuredDataPluginInstance(
940       llvm::StringRef name, llvm::StringRef description,
941       CallbackType create_callback,
942       DebuggerInitializeCallback debugger_init_callback,
943       StructuredDataFilterLaunchInfo filter_callback)
944       : PluginInstance<StructuredDataPluginCreateInstance>(
945             name, description, create_callback, debugger_init_callback),
946         filter_callback(filter_callback) {}
947 
948   StructuredDataFilterLaunchInfo filter_callback = nullptr;
949 };
950 
951 typedef PluginInstances<StructuredDataPluginInstance>
952     StructuredDataPluginInstances;
953 
954 static StructuredDataPluginInstances &GetStructuredDataPluginInstances() {
955   static StructuredDataPluginInstances g_instances;
956   return g_instances;
957 }
958 
959 bool PluginManager::RegisterPlugin(
960     llvm::StringRef name, llvm::StringRef description,
961     StructuredDataPluginCreateInstance create_callback,
962     DebuggerInitializeCallback debugger_init_callback,
963     StructuredDataFilterLaunchInfo filter_callback) {
964   return GetStructuredDataPluginInstances().RegisterPlugin(
965       name, description, create_callback, debugger_init_callback,
966       filter_callback);
967 }
968 
969 bool PluginManager::UnregisterPlugin(
970     StructuredDataPluginCreateInstance create_callback) {
971   return GetStructuredDataPluginInstances().UnregisterPlugin(create_callback);
972 }
973 
974 StructuredDataPluginCreateInstance
975 PluginManager::GetStructuredDataPluginCreateCallbackAtIndex(uint32_t idx) {
976   return GetStructuredDataPluginInstances().GetCallbackAtIndex(idx);
977 }
978 
979 StructuredDataFilterLaunchInfo
980 PluginManager::GetStructuredDataFilterCallbackAtIndex(
981     uint32_t idx, bool &iteration_complete) {
982   const auto &instances = GetStructuredDataPluginInstances().GetInstances();
983   if (idx < instances.size()) {
984     iteration_complete = false;
985     return instances[idx].filter_callback;
986   } else {
987     iteration_complete = true;
988   }
989   return nullptr;
990 }
991 
992 #pragma mark SymbolFile
993 
994 typedef PluginInstance<SymbolFileCreateInstance> SymbolFileInstance;
995 typedef PluginInstances<SymbolFileInstance> SymbolFileInstances;
996 
997 static SymbolFileInstances &GetSymbolFileInstances() {
998   static SymbolFileInstances g_instances;
999   return g_instances;
1000 }
1001 
1002 bool PluginManager::RegisterPlugin(
1003     llvm::StringRef name, llvm::StringRef description,
1004     SymbolFileCreateInstance create_callback,
1005     DebuggerInitializeCallback debugger_init_callback) {
1006   return GetSymbolFileInstances().RegisterPlugin(
1007       name, description, create_callback, debugger_init_callback);
1008 }
1009 
1010 bool PluginManager::UnregisterPlugin(SymbolFileCreateInstance create_callback) {
1011   return GetSymbolFileInstances().UnregisterPlugin(create_callback);
1012 }
1013 
1014 SymbolFileCreateInstance
1015 PluginManager::GetSymbolFileCreateCallbackAtIndex(uint32_t idx) {
1016   return GetSymbolFileInstances().GetCallbackAtIndex(idx);
1017 }
1018 
1019 #pragma mark SymbolVendor
1020 
1021 typedef PluginInstance<SymbolVendorCreateInstance> SymbolVendorInstance;
1022 typedef PluginInstances<SymbolVendorInstance> SymbolVendorInstances;
1023 
1024 static SymbolVendorInstances &GetSymbolVendorInstances() {
1025   static SymbolVendorInstances g_instances;
1026   return g_instances;
1027 }
1028 
1029 bool PluginManager::RegisterPlugin(llvm::StringRef name,
1030                                    llvm::StringRef description,
1031                                    SymbolVendorCreateInstance create_callback) {
1032   return GetSymbolVendorInstances().RegisterPlugin(name, description,
1033                                                    create_callback);
1034 }
1035 
1036 bool PluginManager::UnregisterPlugin(
1037     SymbolVendorCreateInstance create_callback) {
1038   return GetSymbolVendorInstances().UnregisterPlugin(create_callback);
1039 }
1040 
1041 SymbolVendorCreateInstance
1042 PluginManager::GetSymbolVendorCreateCallbackAtIndex(uint32_t idx) {
1043   return GetSymbolVendorInstances().GetCallbackAtIndex(idx);
1044 }
1045 
1046 #pragma mark Trace
1047 
1048 struct TraceInstance
1049     : public PluginInstance<TraceCreateInstanceFromBundle> {
1050   TraceInstance(
1051       llvm::StringRef name, llvm::StringRef description,
1052       CallbackType create_callback_from_bundle,
1053       TraceCreateInstanceForLiveProcess create_callback_for_live_process,
1054       llvm::StringRef schema, DebuggerInitializeCallback debugger_init_callback)
1055       : PluginInstance<TraceCreateInstanceFromBundle>(
1056             name, description, create_callback_from_bundle,
1057             debugger_init_callback),
1058         schema(schema),
1059         create_callback_for_live_process(create_callback_for_live_process) {}
1060 
1061   llvm::StringRef schema;
1062   TraceCreateInstanceForLiveProcess create_callback_for_live_process;
1063 };
1064 
1065 typedef PluginInstances<TraceInstance> TraceInstances;
1066 
1067 static TraceInstances &GetTracePluginInstances() {
1068   static TraceInstances g_instances;
1069   return g_instances;
1070 }
1071 
1072 bool PluginManager::RegisterPlugin(
1073     llvm::StringRef name, llvm::StringRef description,
1074     TraceCreateInstanceFromBundle create_callback_from_bundle,
1075     TraceCreateInstanceForLiveProcess create_callback_for_live_process,
1076     llvm::StringRef schema, DebuggerInitializeCallback debugger_init_callback) {
1077   return GetTracePluginInstances().RegisterPlugin(
1078       name, description, create_callback_from_bundle,
1079       create_callback_for_live_process, schema, debugger_init_callback);
1080 }
1081 
1082 bool PluginManager::UnregisterPlugin(
1083     TraceCreateInstanceFromBundle create_callback_from_bundle) {
1084   return GetTracePluginInstances().UnregisterPlugin(
1085       create_callback_from_bundle);
1086 }
1087 
1088 TraceCreateInstanceFromBundle
1089 PluginManager::GetTraceCreateCallback(llvm::StringRef plugin_name) {
1090   return GetTracePluginInstances().GetCallbackForName(plugin_name);
1091 }
1092 
1093 TraceCreateInstanceForLiveProcess
1094 PluginManager::GetTraceCreateCallbackForLiveProcess(llvm::StringRef plugin_name) {
1095   for (const TraceInstance &instance : GetTracePluginInstances().GetInstances())
1096     if (instance.name == plugin_name)
1097       return instance.create_callback_for_live_process;
1098   return nullptr;
1099 }
1100 
1101 llvm::StringRef PluginManager::GetTraceSchema(llvm::StringRef plugin_name) {
1102   for (const TraceInstance &instance : GetTracePluginInstances().GetInstances())
1103     if (instance.name == plugin_name)
1104       return instance.schema;
1105   return llvm::StringRef();
1106 }
1107 
1108 llvm::StringRef PluginManager::GetTraceSchema(size_t index) {
1109   if (TraceInstance *instance =
1110           GetTracePluginInstances().GetInstanceAtIndex(index))
1111     return instance->schema;
1112   return llvm::StringRef();
1113 }
1114 
1115 #pragma mark TraceExporter
1116 
1117 struct TraceExporterInstance
1118     : public PluginInstance<TraceExporterCreateInstance> {
1119   TraceExporterInstance(
1120       llvm::StringRef name, llvm::StringRef description,
1121       TraceExporterCreateInstance create_instance,
1122       ThreadTraceExportCommandCreator create_thread_trace_export_command)
1123       : PluginInstance<TraceExporterCreateInstance>(name, description,
1124                                                     create_instance),
1125         create_thread_trace_export_command(create_thread_trace_export_command) {
1126   }
1127 
1128   ThreadTraceExportCommandCreator create_thread_trace_export_command;
1129 };
1130 
1131 typedef PluginInstances<TraceExporterInstance> TraceExporterInstances;
1132 
1133 static TraceExporterInstances &GetTraceExporterInstances() {
1134   static TraceExporterInstances g_instances;
1135   return g_instances;
1136 }
1137 
1138 bool PluginManager::RegisterPlugin(
1139     llvm::StringRef name, llvm::StringRef description,
1140     TraceExporterCreateInstance create_callback,
1141     ThreadTraceExportCommandCreator create_thread_trace_export_command) {
1142   return GetTraceExporterInstances().RegisterPlugin(
1143       name, description, create_callback, create_thread_trace_export_command);
1144 }
1145 
1146 TraceExporterCreateInstance
1147 PluginManager::GetTraceExporterCreateCallback(llvm::StringRef plugin_name) {
1148   return GetTraceExporterInstances().GetCallbackForName(plugin_name);
1149 }
1150 
1151 bool PluginManager::UnregisterPlugin(
1152     TraceExporterCreateInstance create_callback) {
1153   return GetTraceExporterInstances().UnregisterPlugin(create_callback);
1154 }
1155 
1156 ThreadTraceExportCommandCreator
1157 PluginManager::GetThreadTraceExportCommandCreatorAtIndex(uint32_t index) {
1158   if (TraceExporterInstance *instance =
1159           GetTraceExporterInstances().GetInstanceAtIndex(index))
1160     return instance->create_thread_trace_export_command;
1161   return nullptr;
1162 }
1163 
1164 llvm::StringRef
1165 PluginManager::GetTraceExporterPluginNameAtIndex(uint32_t index) {
1166   return GetTraceExporterInstances().GetNameAtIndex(index);
1167 }
1168 
1169 #pragma mark UnwindAssembly
1170 
1171 typedef PluginInstance<UnwindAssemblyCreateInstance> UnwindAssemblyInstance;
1172 typedef PluginInstances<UnwindAssemblyInstance> UnwindAssemblyInstances;
1173 
1174 static UnwindAssemblyInstances &GetUnwindAssemblyInstances() {
1175   static UnwindAssemblyInstances g_instances;
1176   return g_instances;
1177 }
1178 
1179 bool PluginManager::RegisterPlugin(
1180     llvm::StringRef name, llvm::StringRef description,
1181     UnwindAssemblyCreateInstance create_callback) {
1182   return GetUnwindAssemblyInstances().RegisterPlugin(name, description,
1183                                                      create_callback);
1184 }
1185 
1186 bool PluginManager::UnregisterPlugin(
1187     UnwindAssemblyCreateInstance create_callback) {
1188   return GetUnwindAssemblyInstances().UnregisterPlugin(create_callback);
1189 }
1190 
1191 UnwindAssemblyCreateInstance
1192 PluginManager::GetUnwindAssemblyCreateCallbackAtIndex(uint32_t idx) {
1193   return GetUnwindAssemblyInstances().GetCallbackAtIndex(idx);
1194 }
1195 
1196 #pragma mark MemoryHistory
1197 
1198 typedef PluginInstance<MemoryHistoryCreateInstance> MemoryHistoryInstance;
1199 typedef PluginInstances<MemoryHistoryInstance> MemoryHistoryInstances;
1200 
1201 static MemoryHistoryInstances &GetMemoryHistoryInstances() {
1202   static MemoryHistoryInstances g_instances;
1203   return g_instances;
1204 }
1205 
1206 bool PluginManager::RegisterPlugin(
1207     llvm::StringRef name, llvm::StringRef description,
1208     MemoryHistoryCreateInstance create_callback) {
1209   return GetMemoryHistoryInstances().RegisterPlugin(name, description,
1210                                                     create_callback);
1211 }
1212 
1213 bool PluginManager::UnregisterPlugin(
1214     MemoryHistoryCreateInstance create_callback) {
1215   return GetMemoryHistoryInstances().UnregisterPlugin(create_callback);
1216 }
1217 
1218 MemoryHistoryCreateInstance
1219 PluginManager::GetMemoryHistoryCreateCallbackAtIndex(uint32_t idx) {
1220   return GetMemoryHistoryInstances().GetCallbackAtIndex(idx);
1221 }
1222 
1223 #pragma mark InstrumentationRuntime
1224 
1225 struct InstrumentationRuntimeInstance
1226     : public PluginInstance<InstrumentationRuntimeCreateInstance> {
1227   InstrumentationRuntimeInstance(
1228       llvm::StringRef name, llvm::StringRef description,
1229       CallbackType create_callback,
1230       InstrumentationRuntimeGetType get_type_callback)
1231       : PluginInstance<InstrumentationRuntimeCreateInstance>(name, description,
1232                                                              create_callback),
1233         get_type_callback(get_type_callback) {}
1234 
1235   InstrumentationRuntimeGetType get_type_callback = nullptr;
1236 };
1237 
1238 typedef PluginInstances<InstrumentationRuntimeInstance>
1239     InstrumentationRuntimeInstances;
1240 
1241 static InstrumentationRuntimeInstances &GetInstrumentationRuntimeInstances() {
1242   static InstrumentationRuntimeInstances g_instances;
1243   return g_instances;
1244 }
1245 
1246 bool PluginManager::RegisterPlugin(
1247     llvm::StringRef name, llvm::StringRef description,
1248     InstrumentationRuntimeCreateInstance create_callback,
1249     InstrumentationRuntimeGetType get_type_callback) {
1250   return GetInstrumentationRuntimeInstances().RegisterPlugin(
1251       name, description, create_callback, get_type_callback);
1252 }
1253 
1254 bool PluginManager::UnregisterPlugin(
1255     InstrumentationRuntimeCreateInstance create_callback) {
1256   return GetInstrumentationRuntimeInstances().UnregisterPlugin(create_callback);
1257 }
1258 
1259 InstrumentationRuntimeGetType
1260 PluginManager::GetInstrumentationRuntimeGetTypeCallbackAtIndex(uint32_t idx) {
1261   const auto &instances = GetInstrumentationRuntimeInstances().GetInstances();
1262   if (idx < instances.size())
1263     return instances[idx].get_type_callback;
1264   return nullptr;
1265 }
1266 
1267 InstrumentationRuntimeCreateInstance
1268 PluginManager::GetInstrumentationRuntimeCreateCallbackAtIndex(uint32_t idx) {
1269   return GetInstrumentationRuntimeInstances().GetCallbackAtIndex(idx);
1270 }
1271 
1272 #pragma mark TypeSystem
1273 
1274 struct TypeSystemInstance : public PluginInstance<TypeSystemCreateInstance> {
1275   TypeSystemInstance(llvm::StringRef name, llvm::StringRef description,
1276                      CallbackType create_callback,
1277                      LanguageSet supported_languages_for_types,
1278                      LanguageSet supported_languages_for_expressions)
1279       : PluginInstance<TypeSystemCreateInstance>(name, description,
1280                                                  create_callback),
1281         supported_languages_for_types(supported_languages_for_types),
1282         supported_languages_for_expressions(
1283             supported_languages_for_expressions) {}
1284 
1285   LanguageSet supported_languages_for_types;
1286   LanguageSet supported_languages_for_expressions;
1287 };
1288 
1289 typedef PluginInstances<TypeSystemInstance> TypeSystemInstances;
1290 
1291 static TypeSystemInstances &GetTypeSystemInstances() {
1292   static TypeSystemInstances g_instances;
1293   return g_instances;
1294 }
1295 
1296 bool PluginManager::RegisterPlugin(
1297     llvm::StringRef name, llvm::StringRef description,
1298     TypeSystemCreateInstance create_callback,
1299     LanguageSet supported_languages_for_types,
1300     LanguageSet supported_languages_for_expressions) {
1301   return GetTypeSystemInstances().RegisterPlugin(
1302       name, description, create_callback, supported_languages_for_types,
1303       supported_languages_for_expressions);
1304 }
1305 
1306 bool PluginManager::UnregisterPlugin(TypeSystemCreateInstance create_callback) {
1307   return GetTypeSystemInstances().UnregisterPlugin(create_callback);
1308 }
1309 
1310 TypeSystemCreateInstance
1311 PluginManager::GetTypeSystemCreateCallbackAtIndex(uint32_t idx) {
1312   return GetTypeSystemInstances().GetCallbackAtIndex(idx);
1313 }
1314 
1315 LanguageSet PluginManager::GetAllTypeSystemSupportedLanguagesForTypes() {
1316   const auto &instances = GetTypeSystemInstances().GetInstances();
1317   LanguageSet all;
1318   for (unsigned i = 0; i < instances.size(); ++i)
1319     all.bitvector |= instances[i].supported_languages_for_types.bitvector;
1320   return all;
1321 }
1322 
1323 LanguageSet PluginManager::GetAllTypeSystemSupportedLanguagesForExpressions() {
1324   const auto &instances = GetTypeSystemInstances().GetInstances();
1325   LanguageSet all;
1326   for (unsigned i = 0; i < instances.size(); ++i)
1327     all.bitvector |= instances[i].supported_languages_for_expressions.bitvector;
1328   return all;
1329 }
1330 
1331 #pragma mark REPL
1332 
1333 struct REPLInstance : public PluginInstance<REPLCreateInstance> {
1334   REPLInstance(llvm::StringRef name, llvm::StringRef description,
1335                CallbackType create_callback, LanguageSet supported_languages)
1336       : PluginInstance<REPLCreateInstance>(name, description, create_callback),
1337         supported_languages(supported_languages) {}
1338 
1339   LanguageSet supported_languages;
1340 };
1341 
1342 typedef PluginInstances<REPLInstance> REPLInstances;
1343 
1344 static REPLInstances &GetREPLInstances() {
1345   static REPLInstances g_instances;
1346   return g_instances;
1347 }
1348 
1349 bool PluginManager::RegisterPlugin(llvm::StringRef name, llvm::StringRef description,
1350                                    REPLCreateInstance create_callback,
1351                                    LanguageSet supported_languages) {
1352   return GetREPLInstances().RegisterPlugin(name, description, create_callback,
1353                                            supported_languages);
1354 }
1355 
1356 bool PluginManager::UnregisterPlugin(REPLCreateInstance create_callback) {
1357   return GetREPLInstances().UnregisterPlugin(create_callback);
1358 }
1359 
1360 REPLCreateInstance PluginManager::GetREPLCreateCallbackAtIndex(uint32_t idx) {
1361   return GetREPLInstances().GetCallbackAtIndex(idx);
1362 }
1363 
1364 LanguageSet PluginManager::GetREPLSupportedLanguagesAtIndex(uint32_t idx) {
1365   const auto &instances = GetREPLInstances().GetInstances();
1366   return idx < instances.size() ? instances[idx].supported_languages
1367                                 : LanguageSet();
1368 }
1369 
1370 LanguageSet PluginManager::GetREPLAllTypeSystemSupportedLanguages() {
1371   const auto &instances = GetREPLInstances().GetInstances();
1372   LanguageSet all;
1373   for (unsigned i = 0; i < instances.size(); ++i)
1374     all.bitvector |= instances[i].supported_languages.bitvector;
1375   return all;
1376 }
1377 
1378 #pragma mark PluginManager
1379 
1380 void PluginManager::DebuggerInitialize(Debugger &debugger) {
1381   GetDynamicLoaderInstances().PerformDebuggerCallback(debugger);
1382   GetJITLoaderInstances().PerformDebuggerCallback(debugger);
1383   GetObjectFileInstances().PerformDebuggerCallback(debugger);
1384   GetPlatformInstances().PerformDebuggerCallback(debugger);
1385   GetProcessInstances().PerformDebuggerCallback(debugger);
1386   GetSymbolFileInstances().PerformDebuggerCallback(debugger);
1387   GetOperatingSystemInstances().PerformDebuggerCallback(debugger);
1388   GetStructuredDataPluginInstances().PerformDebuggerCallback(debugger);
1389   GetTracePluginInstances().PerformDebuggerCallback(debugger);
1390 }
1391 
1392 // This is the preferred new way to register plugin specific settings.  e.g.
1393 // This will put a plugin's settings under e.g.
1394 // "plugin.<plugin_type_name>.<plugin_type_desc>.SETTINGNAME".
1395 static lldb::OptionValuePropertiesSP
1396 GetDebuggerPropertyForPlugins(Debugger &debugger, ConstString plugin_type_name,
1397                               ConstString plugin_type_desc, bool can_create) {
1398   lldb::OptionValuePropertiesSP parent_properties_sp(
1399       debugger.GetValueProperties());
1400   if (parent_properties_sp) {
1401     static ConstString g_property_name("plugin");
1402 
1403     OptionValuePropertiesSP plugin_properties_sp =
1404         parent_properties_sp->GetSubProperty(nullptr, g_property_name);
1405     if (!plugin_properties_sp && can_create) {
1406       plugin_properties_sp =
1407           std::make_shared<OptionValueProperties>(g_property_name);
1408       parent_properties_sp->AppendProperty(
1409           g_property_name, ConstString("Settings specify to plugins."), true,
1410           plugin_properties_sp);
1411     }
1412 
1413     if (plugin_properties_sp) {
1414       lldb::OptionValuePropertiesSP plugin_type_properties_sp =
1415           plugin_properties_sp->GetSubProperty(nullptr, plugin_type_name);
1416       if (!plugin_type_properties_sp && can_create) {
1417         plugin_type_properties_sp =
1418             std::make_shared<OptionValueProperties>(plugin_type_name);
1419         plugin_properties_sp->AppendProperty(plugin_type_name, plugin_type_desc,
1420                                              true, plugin_type_properties_sp);
1421       }
1422       return plugin_type_properties_sp;
1423     }
1424   }
1425   return lldb::OptionValuePropertiesSP();
1426 }
1427 
1428 // This is deprecated way to register plugin specific settings.  e.g.
1429 // "<plugin_type_name>.plugin.<plugin_type_desc>.SETTINGNAME" and Platform
1430 // generic settings would be under "platform.SETTINGNAME".
1431 static lldb::OptionValuePropertiesSP GetDebuggerPropertyForPluginsOldStyle(
1432     Debugger &debugger, ConstString plugin_type_name,
1433     ConstString plugin_type_desc, bool can_create) {
1434   static ConstString g_property_name("plugin");
1435   lldb::OptionValuePropertiesSP parent_properties_sp(
1436       debugger.GetValueProperties());
1437   if (parent_properties_sp) {
1438     OptionValuePropertiesSP plugin_properties_sp =
1439         parent_properties_sp->GetSubProperty(nullptr, plugin_type_name);
1440     if (!plugin_properties_sp && can_create) {
1441       plugin_properties_sp =
1442           std::make_shared<OptionValueProperties>(plugin_type_name);
1443       parent_properties_sp->AppendProperty(plugin_type_name, plugin_type_desc,
1444                                            true, plugin_properties_sp);
1445     }
1446 
1447     if (plugin_properties_sp) {
1448       lldb::OptionValuePropertiesSP plugin_type_properties_sp =
1449           plugin_properties_sp->GetSubProperty(nullptr, g_property_name);
1450       if (!plugin_type_properties_sp && can_create) {
1451         plugin_type_properties_sp =
1452             std::make_shared<OptionValueProperties>(g_property_name);
1453         plugin_properties_sp->AppendProperty(
1454             g_property_name, ConstString("Settings specific to plugins"), true,
1455             plugin_type_properties_sp);
1456       }
1457       return plugin_type_properties_sp;
1458     }
1459   }
1460   return lldb::OptionValuePropertiesSP();
1461 }
1462 
1463 namespace {
1464 
1465 typedef lldb::OptionValuePropertiesSP
1466 GetDebuggerPropertyForPluginsPtr(Debugger &, ConstString, ConstString,
1467                                  bool can_create);
1468 }
1469 
1470 static lldb::OptionValuePropertiesSP
1471 GetSettingForPlugin(Debugger &debugger, ConstString setting_name,
1472                     ConstString plugin_type_name,
1473                     GetDebuggerPropertyForPluginsPtr get_debugger_property =
1474                         GetDebuggerPropertyForPlugins) {
1475   lldb::OptionValuePropertiesSP properties_sp;
1476   lldb::OptionValuePropertiesSP plugin_type_properties_sp(get_debugger_property(
1477       debugger, plugin_type_name,
1478       ConstString(), // not creating to so we don't need the description
1479       false));
1480   if (plugin_type_properties_sp)
1481     properties_sp =
1482         plugin_type_properties_sp->GetSubProperty(nullptr, setting_name);
1483   return properties_sp;
1484 }
1485 
1486 static bool
1487 CreateSettingForPlugin(Debugger &debugger, ConstString plugin_type_name,
1488                        ConstString plugin_type_desc,
1489                        const lldb::OptionValuePropertiesSP &properties_sp,
1490                        ConstString description, bool is_global_property,
1491                        GetDebuggerPropertyForPluginsPtr get_debugger_property =
1492                            GetDebuggerPropertyForPlugins) {
1493   if (properties_sp) {
1494     lldb::OptionValuePropertiesSP plugin_type_properties_sp(
1495         get_debugger_property(debugger, plugin_type_name, plugin_type_desc,
1496                               true));
1497     if (plugin_type_properties_sp) {
1498       plugin_type_properties_sp->AppendProperty(properties_sp->GetName(),
1499                                                 description, is_global_property,
1500                                                 properties_sp);
1501       return true;
1502     }
1503   }
1504   return false;
1505 }
1506 
1507 static const char *kDynamicLoaderPluginName("dynamic-loader");
1508 static const char *kPlatformPluginName("platform");
1509 static const char *kProcessPluginName("process");
1510 static const char *kTracePluginName("trace");
1511 static const char *kObjectFilePluginName("object-file");
1512 static const char *kSymbolFilePluginName("symbol-file");
1513 static const char *kJITLoaderPluginName("jit-loader");
1514 static const char *kStructuredDataPluginName("structured-data");
1515 
1516 lldb::OptionValuePropertiesSP
1517 PluginManager::GetSettingForDynamicLoaderPlugin(Debugger &debugger,
1518                                                 ConstString setting_name) {
1519   return GetSettingForPlugin(debugger, setting_name,
1520                              ConstString(kDynamicLoaderPluginName));
1521 }
1522 
1523 bool PluginManager::CreateSettingForDynamicLoaderPlugin(
1524     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1525     ConstString description, bool is_global_property) {
1526   return CreateSettingForPlugin(
1527       debugger, ConstString(kDynamicLoaderPluginName),
1528       ConstString("Settings for dynamic loader plug-ins"), properties_sp,
1529       description, is_global_property);
1530 }
1531 
1532 lldb::OptionValuePropertiesSP
1533 PluginManager::GetSettingForPlatformPlugin(Debugger &debugger,
1534                                            ConstString setting_name) {
1535   return GetSettingForPlugin(debugger, setting_name,
1536                              ConstString(kPlatformPluginName),
1537                              GetDebuggerPropertyForPluginsOldStyle);
1538 }
1539 
1540 bool PluginManager::CreateSettingForPlatformPlugin(
1541     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1542     ConstString description, bool is_global_property) {
1543   return CreateSettingForPlugin(debugger, ConstString(kPlatformPluginName),
1544                                 ConstString("Settings for platform plug-ins"),
1545                                 properties_sp, description, is_global_property,
1546                                 GetDebuggerPropertyForPluginsOldStyle);
1547 }
1548 
1549 lldb::OptionValuePropertiesSP
1550 PluginManager::GetSettingForProcessPlugin(Debugger &debugger,
1551                                           ConstString setting_name) {
1552   return GetSettingForPlugin(debugger, setting_name,
1553                              ConstString(kProcessPluginName));
1554 }
1555 
1556 bool PluginManager::CreateSettingForProcessPlugin(
1557     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1558     ConstString description, bool is_global_property) {
1559   return CreateSettingForPlugin(debugger, ConstString(kProcessPluginName),
1560                                 ConstString("Settings for process plug-ins"),
1561                                 properties_sp, description, is_global_property);
1562 }
1563 
1564 bool PluginManager::CreateSettingForTracePlugin(
1565     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1566     ConstString description, bool is_global_property) {
1567   return CreateSettingForPlugin(debugger, ConstString(kTracePluginName),
1568                                 ConstString("Settings for trace plug-ins"),
1569                                 properties_sp, description, is_global_property);
1570 }
1571 
1572 lldb::OptionValuePropertiesSP
1573 PluginManager::GetSettingForObjectFilePlugin(Debugger &debugger,
1574                                              ConstString setting_name) {
1575   return GetSettingForPlugin(debugger, setting_name,
1576                              ConstString(kObjectFilePluginName));
1577 }
1578 
1579 bool PluginManager::CreateSettingForObjectFilePlugin(
1580     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1581     ConstString description, bool is_global_property) {
1582   return CreateSettingForPlugin(
1583       debugger, ConstString(kObjectFilePluginName),
1584       ConstString("Settings for object file plug-ins"), properties_sp,
1585       description, is_global_property);
1586 }
1587 
1588 lldb::OptionValuePropertiesSP
1589 PluginManager::GetSettingForSymbolFilePlugin(Debugger &debugger,
1590                                              ConstString setting_name) {
1591   return GetSettingForPlugin(debugger, setting_name,
1592                              ConstString(kSymbolFilePluginName));
1593 }
1594 
1595 bool PluginManager::CreateSettingForSymbolFilePlugin(
1596     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1597     ConstString description, bool is_global_property) {
1598   return CreateSettingForPlugin(
1599       debugger, ConstString(kSymbolFilePluginName),
1600       ConstString("Settings for symbol file plug-ins"), properties_sp,
1601       description, is_global_property);
1602 }
1603 
1604 lldb::OptionValuePropertiesSP
1605 PluginManager::GetSettingForJITLoaderPlugin(Debugger &debugger,
1606                                             ConstString setting_name) {
1607   return GetSettingForPlugin(debugger, setting_name,
1608                              ConstString(kJITLoaderPluginName));
1609 }
1610 
1611 bool PluginManager::CreateSettingForJITLoaderPlugin(
1612     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1613     ConstString description, bool is_global_property) {
1614   return CreateSettingForPlugin(debugger, ConstString(kJITLoaderPluginName),
1615                                 ConstString("Settings for JIT loader plug-ins"),
1616                                 properties_sp, description, is_global_property);
1617 }
1618 
1619 static const char *kOperatingSystemPluginName("os");
1620 
1621 lldb::OptionValuePropertiesSP
1622 PluginManager::GetSettingForOperatingSystemPlugin(Debugger &debugger,
1623                                                   ConstString setting_name) {
1624   lldb::OptionValuePropertiesSP properties_sp;
1625   lldb::OptionValuePropertiesSP plugin_type_properties_sp(
1626       GetDebuggerPropertyForPlugins(
1627           debugger, ConstString(kOperatingSystemPluginName),
1628           ConstString(), // not creating to so we don't need the description
1629           false));
1630   if (plugin_type_properties_sp)
1631     properties_sp =
1632         plugin_type_properties_sp->GetSubProperty(nullptr, setting_name);
1633   return properties_sp;
1634 }
1635 
1636 bool PluginManager::CreateSettingForOperatingSystemPlugin(
1637     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1638     ConstString description, bool is_global_property) {
1639   if (properties_sp) {
1640     lldb::OptionValuePropertiesSP plugin_type_properties_sp(
1641         GetDebuggerPropertyForPlugins(
1642             debugger, ConstString(kOperatingSystemPluginName),
1643             ConstString("Settings for operating system plug-ins"), true));
1644     if (plugin_type_properties_sp) {
1645       plugin_type_properties_sp->AppendProperty(properties_sp->GetName(),
1646                                                 description, is_global_property,
1647                                                 properties_sp);
1648       return true;
1649     }
1650   }
1651   return false;
1652 }
1653 
1654 lldb::OptionValuePropertiesSP
1655 PluginManager::GetSettingForStructuredDataPlugin(Debugger &debugger,
1656                                                  ConstString setting_name) {
1657   return GetSettingForPlugin(debugger, setting_name,
1658                              ConstString(kStructuredDataPluginName));
1659 }
1660 
1661 bool PluginManager::CreateSettingForStructuredDataPlugin(
1662     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1663     ConstString description, bool is_global_property) {
1664   return CreateSettingForPlugin(
1665       debugger, ConstString(kStructuredDataPluginName),
1666       ConstString("Settings for structured data plug-ins"), properties_sp,
1667       description, is_global_property);
1668 }
1669