xref: /freebsd/contrib/llvm-project/lldb/source/Core/PluginManager.cpp (revision 38a52bd3b5cac3da6f7f6eef3dd050e6aa08ebb3)
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       : PluginInstance<ObjectFileCreateInstance>(name, description,
626                                                  create_callback),
627         create_memory_callback(create_memory_callback),
628         get_module_specifications(get_module_specifications),
629         save_core(save_core) {}
630 
631   ObjectFileCreateMemoryInstance create_memory_callback;
632   ObjectFileGetModuleSpecifications get_module_specifications;
633   ObjectFileSaveCore save_core;
634 };
635 typedef PluginInstances<ObjectFileInstance> ObjectFileInstances;
636 
637 static ObjectFileInstances &GetObjectFileInstances() {
638   static ObjectFileInstances g_instances;
639   return g_instances;
640 }
641 
642 bool PluginManager::RegisterPlugin(
643     llvm::StringRef name, llvm::StringRef description,
644     ObjectFileCreateInstance create_callback,
645     ObjectFileCreateMemoryInstance create_memory_callback,
646     ObjectFileGetModuleSpecifications get_module_specifications,
647     ObjectFileSaveCore save_core) {
648   return GetObjectFileInstances().RegisterPlugin(
649       name, description, create_callback, create_memory_callback,
650       get_module_specifications, save_core);
651 }
652 
653 bool PluginManager::UnregisterPlugin(ObjectFileCreateInstance create_callback) {
654   return GetObjectFileInstances().UnregisterPlugin(create_callback);
655 }
656 
657 ObjectFileCreateInstance
658 PluginManager::GetObjectFileCreateCallbackAtIndex(uint32_t idx) {
659   return GetObjectFileInstances().GetCallbackAtIndex(idx);
660 }
661 
662 ObjectFileCreateMemoryInstance
663 PluginManager::GetObjectFileCreateMemoryCallbackAtIndex(uint32_t idx) {
664   const auto &instances = GetObjectFileInstances().GetInstances();
665   if (idx < instances.size())
666     return instances[idx].create_memory_callback;
667   return nullptr;
668 }
669 
670 ObjectFileGetModuleSpecifications
671 PluginManager::GetObjectFileGetModuleSpecificationsCallbackAtIndex(
672     uint32_t idx) {
673   const auto &instances = GetObjectFileInstances().GetInstances();
674   if (idx < instances.size())
675     return instances[idx].get_module_specifications;
676   return nullptr;
677 }
678 
679 ObjectFileCreateMemoryInstance
680 PluginManager::GetObjectFileCreateMemoryCallbackForPluginName(
681     llvm::StringRef name) {
682   const auto &instances = GetObjectFileInstances().GetInstances();
683   for (auto &instance : instances) {
684     if (instance.name == name)
685       return instance.create_memory_callback;
686   }
687   return nullptr;
688 }
689 
690 Status PluginManager::SaveCore(const lldb::ProcessSP &process_sp,
691                                const FileSpec &outfile,
692                                lldb::SaveCoreStyle &core_style,
693                                llvm::StringRef plugin_name) {
694   if (plugin_name.empty()) {
695     // Try saving core directly from the process plugin first.
696     llvm::Expected<bool> ret = process_sp->SaveCore(outfile.GetPath());
697     if (!ret)
698       return Status(ret.takeError());
699     if (ret.get())
700       return Status();
701   }
702 
703   // Fall back to object plugins.
704   Status error;
705   auto &instances = GetObjectFileInstances().GetInstances();
706   for (auto &instance : instances) {
707     if (plugin_name.empty() || instance.name == plugin_name) {
708       if (instance.save_core &&
709           instance.save_core(process_sp, outfile, core_style, error))
710         return error;
711     }
712   }
713   error.SetErrorString(
714       "no ObjectFile plugins were able to save a core for this process");
715   return error;
716 }
717 
718 #pragma mark ObjectContainer
719 
720 struct ObjectContainerInstance
721     : public PluginInstance<ObjectContainerCreateInstance> {
722   ObjectContainerInstance(
723       llvm::StringRef name, llvm::StringRef description,
724       CallbackType create_callback,
725       ObjectFileGetModuleSpecifications get_module_specifications)
726       : PluginInstance<ObjectContainerCreateInstance>(name, description,
727                                                       create_callback),
728         get_module_specifications(get_module_specifications) {}
729 
730   ObjectFileGetModuleSpecifications get_module_specifications;
731 };
732 typedef PluginInstances<ObjectContainerInstance> ObjectContainerInstances;
733 
734 static ObjectContainerInstances &GetObjectContainerInstances() {
735   static ObjectContainerInstances g_instances;
736   return g_instances;
737 }
738 
739 bool PluginManager::RegisterPlugin(
740     llvm::StringRef name, llvm::StringRef description,
741     ObjectContainerCreateInstance create_callback,
742     ObjectFileGetModuleSpecifications get_module_specifications) {
743   return GetObjectContainerInstances().RegisterPlugin(
744       name, description, create_callback, get_module_specifications);
745 }
746 
747 bool PluginManager::UnregisterPlugin(
748     ObjectContainerCreateInstance create_callback) {
749   return GetObjectContainerInstances().UnregisterPlugin(create_callback);
750 }
751 
752 ObjectContainerCreateInstance
753 PluginManager::GetObjectContainerCreateCallbackAtIndex(uint32_t idx) {
754   return GetObjectContainerInstances().GetCallbackAtIndex(idx);
755 }
756 
757 ObjectFileGetModuleSpecifications
758 PluginManager::GetObjectContainerGetModuleSpecificationsCallbackAtIndex(
759     uint32_t idx) {
760   const auto &instances = GetObjectContainerInstances().GetInstances();
761   if (idx < instances.size())
762     return instances[idx].get_module_specifications;
763   return nullptr;
764 }
765 
766 #pragma mark Platform
767 
768 typedef PluginInstance<PlatformCreateInstance> PlatformInstance;
769 typedef PluginInstances<PlatformInstance> PlatformInstances;
770 
771 static PlatformInstances &GetPlatformInstances() {
772   static PlatformInstances g_platform_instances;
773   return g_platform_instances;
774 }
775 
776 bool PluginManager::RegisterPlugin(
777     llvm::StringRef name, llvm::StringRef description,
778     PlatformCreateInstance create_callback,
779     DebuggerInitializeCallback debugger_init_callback) {
780   return GetPlatformInstances().RegisterPlugin(
781       name, description, create_callback, debugger_init_callback);
782 }
783 
784 bool PluginManager::UnregisterPlugin(PlatformCreateInstance create_callback) {
785   return GetPlatformInstances().UnregisterPlugin(create_callback);
786 }
787 
788 llvm::StringRef PluginManager::GetPlatformPluginNameAtIndex(uint32_t idx) {
789   return GetPlatformInstances().GetNameAtIndex(idx);
790 }
791 
792 llvm::StringRef
793 PluginManager::GetPlatformPluginDescriptionAtIndex(uint32_t idx) {
794   return GetPlatformInstances().GetDescriptionAtIndex(idx);
795 }
796 
797 PlatformCreateInstance
798 PluginManager::GetPlatformCreateCallbackAtIndex(uint32_t idx) {
799   return GetPlatformInstances().GetCallbackAtIndex(idx);
800 }
801 
802 PlatformCreateInstance
803 PluginManager::GetPlatformCreateCallbackForPluginName(llvm::StringRef name) {
804   return GetPlatformInstances().GetCallbackForName(name);
805 }
806 
807 void PluginManager::AutoCompletePlatformName(llvm::StringRef name,
808                                              CompletionRequest &request) {
809   for (const auto &instance : GetPlatformInstances().GetInstances()) {
810     if (instance.name.startswith(name))
811       request.AddCompletion(instance.name);
812   }
813 }
814 
815 #pragma mark Process
816 
817 typedef PluginInstance<ProcessCreateInstance> ProcessInstance;
818 typedef PluginInstances<ProcessInstance> ProcessInstances;
819 
820 static ProcessInstances &GetProcessInstances() {
821   static ProcessInstances g_instances;
822   return g_instances;
823 }
824 
825 bool PluginManager::RegisterPlugin(
826     llvm::StringRef name, llvm::StringRef description,
827     ProcessCreateInstance create_callback,
828     DebuggerInitializeCallback debugger_init_callback) {
829   return GetProcessInstances().RegisterPlugin(
830       name, description, create_callback, debugger_init_callback);
831 }
832 
833 bool PluginManager::UnregisterPlugin(ProcessCreateInstance create_callback) {
834   return GetProcessInstances().UnregisterPlugin(create_callback);
835 }
836 
837 llvm::StringRef PluginManager::GetProcessPluginNameAtIndex(uint32_t idx) {
838   return GetProcessInstances().GetNameAtIndex(idx);
839 }
840 
841 llvm::StringRef PluginManager::GetProcessPluginDescriptionAtIndex(uint32_t idx) {
842   return GetProcessInstances().GetDescriptionAtIndex(idx);
843 }
844 
845 ProcessCreateInstance
846 PluginManager::GetProcessCreateCallbackAtIndex(uint32_t idx) {
847   return GetProcessInstances().GetCallbackAtIndex(idx);
848 }
849 
850 ProcessCreateInstance
851 PluginManager::GetProcessCreateCallbackForPluginName(llvm::StringRef name) {
852   return GetProcessInstances().GetCallbackForName(name);
853 }
854 
855 void PluginManager::AutoCompleteProcessName(llvm::StringRef name,
856                                             CompletionRequest &request) {
857   for (const auto &instance : GetProcessInstances().GetInstances()) {
858     if (instance.name.startswith(name))
859       request.AddCompletion(instance.name, instance.description);
860   }
861 }
862 
863 #pragma mark ScriptInterpreter
864 
865 struct ScriptInterpreterInstance
866     : public PluginInstance<ScriptInterpreterCreateInstance> {
867   ScriptInterpreterInstance(llvm::StringRef name, llvm::StringRef description,
868                             CallbackType create_callback,
869                             lldb::ScriptLanguage language)
870       : PluginInstance<ScriptInterpreterCreateInstance>(name, description,
871                                                         create_callback),
872         language(language) {}
873 
874   lldb::ScriptLanguage language = lldb::eScriptLanguageNone;
875 };
876 
877 typedef PluginInstances<ScriptInterpreterInstance> ScriptInterpreterInstances;
878 
879 static ScriptInterpreterInstances &GetScriptInterpreterInstances() {
880   static ScriptInterpreterInstances g_instances;
881   return g_instances;
882 }
883 
884 bool PluginManager::RegisterPlugin(
885     llvm::StringRef name, llvm::StringRef description,
886     lldb::ScriptLanguage script_language,
887     ScriptInterpreterCreateInstance create_callback) {
888   return GetScriptInterpreterInstances().RegisterPlugin(
889       name, description, create_callback, script_language);
890 }
891 
892 bool PluginManager::UnregisterPlugin(
893     ScriptInterpreterCreateInstance create_callback) {
894   return GetScriptInterpreterInstances().UnregisterPlugin(create_callback);
895 }
896 
897 ScriptInterpreterCreateInstance
898 PluginManager::GetScriptInterpreterCreateCallbackAtIndex(uint32_t idx) {
899   return GetScriptInterpreterInstances().GetCallbackAtIndex(idx);
900 }
901 
902 lldb::ScriptInterpreterSP
903 PluginManager::GetScriptInterpreterForLanguage(lldb::ScriptLanguage script_lang,
904                                                Debugger &debugger) {
905   const auto &instances = GetScriptInterpreterInstances().GetInstances();
906   ScriptInterpreterCreateInstance none_instance = nullptr;
907   for (const auto &instance : instances) {
908     if (instance.language == lldb::eScriptLanguageNone)
909       none_instance = instance.create_callback;
910 
911     if (script_lang == instance.language)
912       return instance.create_callback(debugger);
913   }
914 
915   // If we didn't find one, return the ScriptInterpreter for the null language.
916   assert(none_instance != nullptr);
917   return none_instance(debugger);
918 }
919 
920 #pragma mark StructuredDataPlugin
921 
922 struct StructuredDataPluginInstance
923     : public PluginInstance<StructuredDataPluginCreateInstance> {
924   StructuredDataPluginInstance(
925       llvm::StringRef name, llvm::StringRef description,
926       CallbackType create_callback,
927       DebuggerInitializeCallback debugger_init_callback,
928       StructuredDataFilterLaunchInfo filter_callback)
929       : PluginInstance<StructuredDataPluginCreateInstance>(
930             name, description, create_callback, debugger_init_callback),
931         filter_callback(filter_callback) {}
932 
933   StructuredDataFilterLaunchInfo filter_callback = nullptr;
934 };
935 
936 typedef PluginInstances<StructuredDataPluginInstance>
937     StructuredDataPluginInstances;
938 
939 static StructuredDataPluginInstances &GetStructuredDataPluginInstances() {
940   static StructuredDataPluginInstances g_instances;
941   return g_instances;
942 }
943 
944 bool PluginManager::RegisterPlugin(
945     llvm::StringRef name, llvm::StringRef description,
946     StructuredDataPluginCreateInstance create_callback,
947     DebuggerInitializeCallback debugger_init_callback,
948     StructuredDataFilterLaunchInfo filter_callback) {
949   return GetStructuredDataPluginInstances().RegisterPlugin(
950       name, description, create_callback, debugger_init_callback,
951       filter_callback);
952 }
953 
954 bool PluginManager::UnregisterPlugin(
955     StructuredDataPluginCreateInstance create_callback) {
956   return GetStructuredDataPluginInstances().UnregisterPlugin(create_callback);
957 }
958 
959 StructuredDataPluginCreateInstance
960 PluginManager::GetStructuredDataPluginCreateCallbackAtIndex(uint32_t idx) {
961   return GetStructuredDataPluginInstances().GetCallbackAtIndex(idx);
962 }
963 
964 StructuredDataFilterLaunchInfo
965 PluginManager::GetStructuredDataFilterCallbackAtIndex(
966     uint32_t idx, bool &iteration_complete) {
967   const auto &instances = GetStructuredDataPluginInstances().GetInstances();
968   if (idx < instances.size()) {
969     iteration_complete = false;
970     return instances[idx].filter_callback;
971   } else {
972     iteration_complete = true;
973   }
974   return nullptr;
975 }
976 
977 #pragma mark SymbolFile
978 
979 typedef PluginInstance<SymbolFileCreateInstance> SymbolFileInstance;
980 typedef PluginInstances<SymbolFileInstance> SymbolFileInstances;
981 
982 static SymbolFileInstances &GetSymbolFileInstances() {
983   static SymbolFileInstances g_instances;
984   return g_instances;
985 }
986 
987 bool PluginManager::RegisterPlugin(
988     llvm::StringRef name, llvm::StringRef description,
989     SymbolFileCreateInstance create_callback,
990     DebuggerInitializeCallback debugger_init_callback) {
991   return GetSymbolFileInstances().RegisterPlugin(
992       name, description, create_callback, debugger_init_callback);
993 }
994 
995 bool PluginManager::UnregisterPlugin(SymbolFileCreateInstance create_callback) {
996   return GetSymbolFileInstances().UnregisterPlugin(create_callback);
997 }
998 
999 SymbolFileCreateInstance
1000 PluginManager::GetSymbolFileCreateCallbackAtIndex(uint32_t idx) {
1001   return GetSymbolFileInstances().GetCallbackAtIndex(idx);
1002 }
1003 
1004 #pragma mark SymbolVendor
1005 
1006 typedef PluginInstance<SymbolVendorCreateInstance> SymbolVendorInstance;
1007 typedef PluginInstances<SymbolVendorInstance> SymbolVendorInstances;
1008 
1009 static SymbolVendorInstances &GetSymbolVendorInstances() {
1010   static SymbolVendorInstances g_instances;
1011   return g_instances;
1012 }
1013 
1014 bool PluginManager::RegisterPlugin(llvm::StringRef name,
1015                                    llvm::StringRef description,
1016                                    SymbolVendorCreateInstance create_callback) {
1017   return GetSymbolVendorInstances().RegisterPlugin(name, description,
1018                                                    create_callback);
1019 }
1020 
1021 bool PluginManager::UnregisterPlugin(
1022     SymbolVendorCreateInstance create_callback) {
1023   return GetSymbolVendorInstances().UnregisterPlugin(create_callback);
1024 }
1025 
1026 SymbolVendorCreateInstance
1027 PluginManager::GetSymbolVendorCreateCallbackAtIndex(uint32_t idx) {
1028   return GetSymbolVendorInstances().GetCallbackAtIndex(idx);
1029 }
1030 
1031 #pragma mark Trace
1032 
1033 struct TraceInstance
1034     : public PluginInstance<TraceCreateInstanceForSessionFile> {
1035   TraceInstance(
1036       llvm::StringRef name, llvm::StringRef description,
1037       CallbackType create_callback_for_session_file,
1038       TraceCreateInstanceForLiveProcess create_callback_for_live_process,
1039       llvm::StringRef schema)
1040       : PluginInstance<TraceCreateInstanceForSessionFile>(
1041             name, description, create_callback_for_session_file),
1042         schema(schema),
1043         create_callback_for_live_process(create_callback_for_live_process) {}
1044 
1045   llvm::StringRef schema;
1046   TraceCreateInstanceForLiveProcess create_callback_for_live_process;
1047 };
1048 
1049 typedef PluginInstances<TraceInstance> TraceInstances;
1050 
1051 static TraceInstances &GetTracePluginInstances() {
1052   static TraceInstances g_instances;
1053   return g_instances;
1054 }
1055 
1056 bool PluginManager::RegisterPlugin(
1057     llvm::StringRef name, llvm::StringRef description,
1058     TraceCreateInstanceForSessionFile create_callback_for_session_file,
1059     TraceCreateInstanceForLiveProcess create_callback_for_live_process,
1060     llvm::StringRef schema) {
1061   return GetTracePluginInstances().RegisterPlugin(
1062       name, description, create_callback_for_session_file,
1063       create_callback_for_live_process, schema);
1064 }
1065 
1066 bool PluginManager::UnregisterPlugin(
1067     TraceCreateInstanceForSessionFile create_callback_for_session_file) {
1068   return GetTracePluginInstances().UnregisterPlugin(
1069       create_callback_for_session_file);
1070 }
1071 
1072 TraceCreateInstanceForSessionFile
1073 PluginManager::GetTraceCreateCallback(llvm::StringRef plugin_name) {
1074   return GetTracePluginInstances().GetCallbackForName(plugin_name);
1075 }
1076 
1077 TraceCreateInstanceForLiveProcess
1078 PluginManager::GetTraceCreateCallbackForLiveProcess(llvm::StringRef plugin_name) {
1079   for (const TraceInstance &instance : GetTracePluginInstances().GetInstances())
1080     if (instance.name == plugin_name)
1081       return instance.create_callback_for_live_process;
1082   return nullptr;
1083 }
1084 
1085 llvm::StringRef PluginManager::GetTraceSchema(llvm::StringRef plugin_name) {
1086   for (const TraceInstance &instance : GetTracePluginInstances().GetInstances())
1087     if (instance.name == plugin_name)
1088       return instance.schema;
1089   return llvm::StringRef();
1090 }
1091 
1092 llvm::StringRef PluginManager::GetTraceSchema(size_t index) {
1093   if (TraceInstance *instance =
1094           GetTracePluginInstances().GetInstanceAtIndex(index))
1095     return instance->schema;
1096   return llvm::StringRef();
1097 }
1098 
1099 #pragma mark TraceExporter
1100 
1101 struct TraceExporterInstance
1102     : public PluginInstance<TraceExporterCreateInstance> {
1103   TraceExporterInstance(
1104       llvm::StringRef name, llvm::StringRef description,
1105       TraceExporterCreateInstance create_instance,
1106       ThreadTraceExportCommandCreator create_thread_trace_export_command)
1107       : PluginInstance<TraceExporterCreateInstance>(name, description,
1108                                                     create_instance),
1109         create_thread_trace_export_command(create_thread_trace_export_command) {
1110   }
1111 
1112   ThreadTraceExportCommandCreator create_thread_trace_export_command;
1113 };
1114 
1115 typedef PluginInstances<TraceExporterInstance> TraceExporterInstances;
1116 
1117 static TraceExporterInstances &GetTraceExporterInstances() {
1118   static TraceExporterInstances g_instances;
1119   return g_instances;
1120 }
1121 
1122 bool PluginManager::RegisterPlugin(
1123     llvm::StringRef name, llvm::StringRef description,
1124     TraceExporterCreateInstance create_callback,
1125     ThreadTraceExportCommandCreator create_thread_trace_export_command) {
1126   return GetTraceExporterInstances().RegisterPlugin(
1127       name, description, create_callback, create_thread_trace_export_command);
1128 }
1129 
1130 TraceExporterCreateInstance
1131 PluginManager::GetTraceExporterCreateCallback(llvm::StringRef plugin_name) {
1132   return GetTraceExporterInstances().GetCallbackForName(plugin_name);
1133 }
1134 
1135 bool PluginManager::UnregisterPlugin(
1136     TraceExporterCreateInstance create_callback) {
1137   return GetTraceExporterInstances().UnregisterPlugin(create_callback);
1138 }
1139 
1140 ThreadTraceExportCommandCreator
1141 PluginManager::GetThreadTraceExportCommandCreatorAtIndex(uint32_t index) {
1142   if (TraceExporterInstance *instance =
1143           GetTraceExporterInstances().GetInstanceAtIndex(index))
1144     return instance->create_thread_trace_export_command;
1145   return nullptr;
1146 }
1147 
1148 llvm::StringRef
1149 PluginManager::GetTraceExporterPluginNameAtIndex(uint32_t index) {
1150   return GetTraceExporterInstances().GetNameAtIndex(index);
1151 }
1152 
1153 #pragma mark UnwindAssembly
1154 
1155 typedef PluginInstance<UnwindAssemblyCreateInstance> UnwindAssemblyInstance;
1156 typedef PluginInstances<UnwindAssemblyInstance> UnwindAssemblyInstances;
1157 
1158 static UnwindAssemblyInstances &GetUnwindAssemblyInstances() {
1159   static UnwindAssemblyInstances g_instances;
1160   return g_instances;
1161 }
1162 
1163 bool PluginManager::RegisterPlugin(
1164     llvm::StringRef name, llvm::StringRef description,
1165     UnwindAssemblyCreateInstance create_callback) {
1166   return GetUnwindAssemblyInstances().RegisterPlugin(name, description,
1167                                                      create_callback);
1168 }
1169 
1170 bool PluginManager::UnregisterPlugin(
1171     UnwindAssemblyCreateInstance create_callback) {
1172   return GetUnwindAssemblyInstances().UnregisterPlugin(create_callback);
1173 }
1174 
1175 UnwindAssemblyCreateInstance
1176 PluginManager::GetUnwindAssemblyCreateCallbackAtIndex(uint32_t idx) {
1177   return GetUnwindAssemblyInstances().GetCallbackAtIndex(idx);
1178 }
1179 
1180 #pragma mark MemoryHistory
1181 
1182 typedef PluginInstance<MemoryHistoryCreateInstance> MemoryHistoryInstance;
1183 typedef PluginInstances<MemoryHistoryInstance> MemoryHistoryInstances;
1184 
1185 static MemoryHistoryInstances &GetMemoryHistoryInstances() {
1186   static MemoryHistoryInstances g_instances;
1187   return g_instances;
1188 }
1189 
1190 bool PluginManager::RegisterPlugin(
1191     llvm::StringRef name, llvm::StringRef description,
1192     MemoryHistoryCreateInstance create_callback) {
1193   return GetMemoryHistoryInstances().RegisterPlugin(name, description,
1194                                                     create_callback);
1195 }
1196 
1197 bool PluginManager::UnregisterPlugin(
1198     MemoryHistoryCreateInstance create_callback) {
1199   return GetMemoryHistoryInstances().UnregisterPlugin(create_callback);
1200 }
1201 
1202 MemoryHistoryCreateInstance
1203 PluginManager::GetMemoryHistoryCreateCallbackAtIndex(uint32_t idx) {
1204   return GetMemoryHistoryInstances().GetCallbackAtIndex(idx);
1205 }
1206 
1207 #pragma mark InstrumentationRuntime
1208 
1209 struct InstrumentationRuntimeInstance
1210     : public PluginInstance<InstrumentationRuntimeCreateInstance> {
1211   InstrumentationRuntimeInstance(
1212       llvm::StringRef name, llvm::StringRef description,
1213       CallbackType create_callback,
1214       InstrumentationRuntimeGetType get_type_callback)
1215       : PluginInstance<InstrumentationRuntimeCreateInstance>(name, description,
1216                                                              create_callback),
1217         get_type_callback(get_type_callback) {}
1218 
1219   InstrumentationRuntimeGetType get_type_callback = nullptr;
1220 };
1221 
1222 typedef PluginInstances<InstrumentationRuntimeInstance>
1223     InstrumentationRuntimeInstances;
1224 
1225 static InstrumentationRuntimeInstances &GetInstrumentationRuntimeInstances() {
1226   static InstrumentationRuntimeInstances g_instances;
1227   return g_instances;
1228 }
1229 
1230 bool PluginManager::RegisterPlugin(
1231     llvm::StringRef name, llvm::StringRef description,
1232     InstrumentationRuntimeCreateInstance create_callback,
1233     InstrumentationRuntimeGetType get_type_callback) {
1234   return GetInstrumentationRuntimeInstances().RegisterPlugin(
1235       name, description, create_callback, get_type_callback);
1236 }
1237 
1238 bool PluginManager::UnregisterPlugin(
1239     InstrumentationRuntimeCreateInstance create_callback) {
1240   return GetInstrumentationRuntimeInstances().UnregisterPlugin(create_callback);
1241 }
1242 
1243 InstrumentationRuntimeGetType
1244 PluginManager::GetInstrumentationRuntimeGetTypeCallbackAtIndex(uint32_t idx) {
1245   const auto &instances = GetInstrumentationRuntimeInstances().GetInstances();
1246   if (idx < instances.size())
1247     return instances[idx].get_type_callback;
1248   return nullptr;
1249 }
1250 
1251 InstrumentationRuntimeCreateInstance
1252 PluginManager::GetInstrumentationRuntimeCreateCallbackAtIndex(uint32_t idx) {
1253   return GetInstrumentationRuntimeInstances().GetCallbackAtIndex(idx);
1254 }
1255 
1256 #pragma mark TypeSystem
1257 
1258 struct TypeSystemInstance : public PluginInstance<TypeSystemCreateInstance> {
1259   TypeSystemInstance(llvm::StringRef name, llvm::StringRef description,
1260                      CallbackType create_callback,
1261                      LanguageSet supported_languages_for_types,
1262                      LanguageSet supported_languages_for_expressions)
1263       : PluginInstance<TypeSystemCreateInstance>(name, description,
1264                                                  create_callback),
1265         supported_languages_for_types(supported_languages_for_types),
1266         supported_languages_for_expressions(
1267             supported_languages_for_expressions) {}
1268 
1269   LanguageSet supported_languages_for_types;
1270   LanguageSet supported_languages_for_expressions;
1271 };
1272 
1273 typedef PluginInstances<TypeSystemInstance> TypeSystemInstances;
1274 
1275 static TypeSystemInstances &GetTypeSystemInstances() {
1276   static TypeSystemInstances g_instances;
1277   return g_instances;
1278 }
1279 
1280 bool PluginManager::RegisterPlugin(
1281     llvm::StringRef name, llvm::StringRef description,
1282     TypeSystemCreateInstance create_callback,
1283     LanguageSet supported_languages_for_types,
1284     LanguageSet supported_languages_for_expressions) {
1285   return GetTypeSystemInstances().RegisterPlugin(
1286       name, description, create_callback, supported_languages_for_types,
1287       supported_languages_for_expressions);
1288 }
1289 
1290 bool PluginManager::UnregisterPlugin(TypeSystemCreateInstance create_callback) {
1291   return GetTypeSystemInstances().UnregisterPlugin(create_callback);
1292 }
1293 
1294 TypeSystemCreateInstance
1295 PluginManager::GetTypeSystemCreateCallbackAtIndex(uint32_t idx) {
1296   return GetTypeSystemInstances().GetCallbackAtIndex(idx);
1297 }
1298 
1299 LanguageSet PluginManager::GetAllTypeSystemSupportedLanguagesForTypes() {
1300   const auto &instances = GetTypeSystemInstances().GetInstances();
1301   LanguageSet all;
1302   for (unsigned i = 0; i < instances.size(); ++i)
1303     all.bitvector |= instances[i].supported_languages_for_types.bitvector;
1304   return all;
1305 }
1306 
1307 LanguageSet PluginManager::GetAllTypeSystemSupportedLanguagesForExpressions() {
1308   const auto &instances = GetTypeSystemInstances().GetInstances();
1309   LanguageSet all;
1310   for (unsigned i = 0; i < instances.size(); ++i)
1311     all.bitvector |= instances[i].supported_languages_for_expressions.bitvector;
1312   return all;
1313 }
1314 
1315 #pragma mark REPL
1316 
1317 struct REPLInstance : public PluginInstance<REPLCreateInstance> {
1318   REPLInstance(llvm::StringRef name, llvm::StringRef description,
1319                CallbackType create_callback, LanguageSet supported_languages)
1320       : PluginInstance<REPLCreateInstance>(name, description, create_callback),
1321         supported_languages(supported_languages) {}
1322 
1323   LanguageSet supported_languages;
1324 };
1325 
1326 typedef PluginInstances<REPLInstance> REPLInstances;
1327 
1328 static REPLInstances &GetREPLInstances() {
1329   static REPLInstances g_instances;
1330   return g_instances;
1331 }
1332 
1333 bool PluginManager::RegisterPlugin(llvm::StringRef name, llvm::StringRef description,
1334                                    REPLCreateInstance create_callback,
1335                                    LanguageSet supported_languages) {
1336   return GetREPLInstances().RegisterPlugin(name, description, create_callback,
1337                                            supported_languages);
1338 }
1339 
1340 bool PluginManager::UnregisterPlugin(REPLCreateInstance create_callback) {
1341   return GetREPLInstances().UnregisterPlugin(create_callback);
1342 }
1343 
1344 REPLCreateInstance PluginManager::GetREPLCreateCallbackAtIndex(uint32_t idx) {
1345   return GetREPLInstances().GetCallbackAtIndex(idx);
1346 }
1347 
1348 LanguageSet PluginManager::GetREPLSupportedLanguagesAtIndex(uint32_t idx) {
1349   const auto &instances = GetREPLInstances().GetInstances();
1350   return idx < instances.size() ? instances[idx].supported_languages
1351                                 : LanguageSet();
1352 }
1353 
1354 LanguageSet PluginManager::GetREPLAllTypeSystemSupportedLanguages() {
1355   const auto &instances = GetREPLInstances().GetInstances();
1356   LanguageSet all;
1357   for (unsigned i = 0; i < instances.size(); ++i)
1358     all.bitvector |= instances[i].supported_languages.bitvector;
1359   return all;
1360 }
1361 
1362 #pragma mark PluginManager
1363 
1364 void PluginManager::DebuggerInitialize(Debugger &debugger) {
1365   GetDynamicLoaderInstances().PerformDebuggerCallback(debugger);
1366   GetJITLoaderInstances().PerformDebuggerCallback(debugger);
1367   GetPlatformInstances().PerformDebuggerCallback(debugger);
1368   GetProcessInstances().PerformDebuggerCallback(debugger);
1369   GetSymbolFileInstances().PerformDebuggerCallback(debugger);
1370   GetOperatingSystemInstances().PerformDebuggerCallback(debugger);
1371   GetStructuredDataPluginInstances().PerformDebuggerCallback(debugger);
1372   GetTracePluginInstances().PerformDebuggerCallback(debugger);
1373 }
1374 
1375 // This is the preferred new way to register plugin specific settings.  e.g.
1376 // This will put a plugin's settings under e.g.
1377 // "plugin.<plugin_type_name>.<plugin_type_desc>.SETTINGNAME".
1378 static lldb::OptionValuePropertiesSP
1379 GetDebuggerPropertyForPlugins(Debugger &debugger, ConstString plugin_type_name,
1380                               ConstString plugin_type_desc, bool can_create) {
1381   lldb::OptionValuePropertiesSP parent_properties_sp(
1382       debugger.GetValueProperties());
1383   if (parent_properties_sp) {
1384     static ConstString g_property_name("plugin");
1385 
1386     OptionValuePropertiesSP plugin_properties_sp =
1387         parent_properties_sp->GetSubProperty(nullptr, g_property_name);
1388     if (!plugin_properties_sp && can_create) {
1389       plugin_properties_sp =
1390           std::make_shared<OptionValueProperties>(g_property_name);
1391       parent_properties_sp->AppendProperty(
1392           g_property_name, ConstString("Settings specify to plugins."), true,
1393           plugin_properties_sp);
1394     }
1395 
1396     if (plugin_properties_sp) {
1397       lldb::OptionValuePropertiesSP plugin_type_properties_sp =
1398           plugin_properties_sp->GetSubProperty(nullptr, plugin_type_name);
1399       if (!plugin_type_properties_sp && can_create) {
1400         plugin_type_properties_sp =
1401             std::make_shared<OptionValueProperties>(plugin_type_name);
1402         plugin_properties_sp->AppendProperty(plugin_type_name, plugin_type_desc,
1403                                              true, plugin_type_properties_sp);
1404       }
1405       return plugin_type_properties_sp;
1406     }
1407   }
1408   return lldb::OptionValuePropertiesSP();
1409 }
1410 
1411 // This is deprecated way to register plugin specific settings.  e.g.
1412 // "<plugin_type_name>.plugin.<plugin_type_desc>.SETTINGNAME" and Platform
1413 // generic settings would be under "platform.SETTINGNAME".
1414 static lldb::OptionValuePropertiesSP GetDebuggerPropertyForPluginsOldStyle(
1415     Debugger &debugger, ConstString plugin_type_name,
1416     ConstString plugin_type_desc, bool can_create) {
1417   static ConstString g_property_name("plugin");
1418   lldb::OptionValuePropertiesSP parent_properties_sp(
1419       debugger.GetValueProperties());
1420   if (parent_properties_sp) {
1421     OptionValuePropertiesSP plugin_properties_sp =
1422         parent_properties_sp->GetSubProperty(nullptr, plugin_type_name);
1423     if (!plugin_properties_sp && can_create) {
1424       plugin_properties_sp =
1425           std::make_shared<OptionValueProperties>(plugin_type_name);
1426       parent_properties_sp->AppendProperty(plugin_type_name, plugin_type_desc,
1427                                            true, plugin_properties_sp);
1428     }
1429 
1430     if (plugin_properties_sp) {
1431       lldb::OptionValuePropertiesSP plugin_type_properties_sp =
1432           plugin_properties_sp->GetSubProperty(nullptr, g_property_name);
1433       if (!plugin_type_properties_sp && can_create) {
1434         plugin_type_properties_sp =
1435             std::make_shared<OptionValueProperties>(g_property_name);
1436         plugin_properties_sp->AppendProperty(
1437             g_property_name, ConstString("Settings specific to plugins"), true,
1438             plugin_type_properties_sp);
1439       }
1440       return plugin_type_properties_sp;
1441     }
1442   }
1443   return lldb::OptionValuePropertiesSP();
1444 }
1445 
1446 namespace {
1447 
1448 typedef lldb::OptionValuePropertiesSP
1449 GetDebuggerPropertyForPluginsPtr(Debugger &, ConstString, ConstString,
1450                                  bool can_create);
1451 }
1452 
1453 static lldb::OptionValuePropertiesSP
1454 GetSettingForPlugin(Debugger &debugger, ConstString setting_name,
1455                     ConstString plugin_type_name,
1456                     GetDebuggerPropertyForPluginsPtr get_debugger_property =
1457                         GetDebuggerPropertyForPlugins) {
1458   lldb::OptionValuePropertiesSP properties_sp;
1459   lldb::OptionValuePropertiesSP plugin_type_properties_sp(get_debugger_property(
1460       debugger, plugin_type_name,
1461       ConstString(), // not creating to so we don't need the description
1462       false));
1463   if (plugin_type_properties_sp)
1464     properties_sp =
1465         plugin_type_properties_sp->GetSubProperty(nullptr, setting_name);
1466   return properties_sp;
1467 }
1468 
1469 static bool
1470 CreateSettingForPlugin(Debugger &debugger, ConstString plugin_type_name,
1471                        ConstString plugin_type_desc,
1472                        const lldb::OptionValuePropertiesSP &properties_sp,
1473                        ConstString description, bool is_global_property,
1474                        GetDebuggerPropertyForPluginsPtr get_debugger_property =
1475                            GetDebuggerPropertyForPlugins) {
1476   if (properties_sp) {
1477     lldb::OptionValuePropertiesSP plugin_type_properties_sp(
1478         get_debugger_property(debugger, plugin_type_name, plugin_type_desc,
1479                               true));
1480     if (plugin_type_properties_sp) {
1481       plugin_type_properties_sp->AppendProperty(properties_sp->GetName(),
1482                                                 description, is_global_property,
1483                                                 properties_sp);
1484       return true;
1485     }
1486   }
1487   return false;
1488 }
1489 
1490 static const char *kDynamicLoaderPluginName("dynamic-loader");
1491 static const char *kPlatformPluginName("platform");
1492 static const char *kProcessPluginName("process");
1493 static const char *kSymbolFilePluginName("symbol-file");
1494 static const char *kJITLoaderPluginName("jit-loader");
1495 static const char *kStructuredDataPluginName("structured-data");
1496 
1497 lldb::OptionValuePropertiesSP
1498 PluginManager::GetSettingForDynamicLoaderPlugin(Debugger &debugger,
1499                                                 ConstString setting_name) {
1500   return GetSettingForPlugin(debugger, setting_name,
1501                              ConstString(kDynamicLoaderPluginName));
1502 }
1503 
1504 bool PluginManager::CreateSettingForDynamicLoaderPlugin(
1505     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1506     ConstString description, bool is_global_property) {
1507   return CreateSettingForPlugin(
1508       debugger, ConstString(kDynamicLoaderPluginName),
1509       ConstString("Settings for dynamic loader plug-ins"), properties_sp,
1510       description, is_global_property);
1511 }
1512 
1513 lldb::OptionValuePropertiesSP
1514 PluginManager::GetSettingForPlatformPlugin(Debugger &debugger,
1515                                            ConstString setting_name) {
1516   return GetSettingForPlugin(debugger, setting_name,
1517                              ConstString(kPlatformPluginName),
1518                              GetDebuggerPropertyForPluginsOldStyle);
1519 }
1520 
1521 bool PluginManager::CreateSettingForPlatformPlugin(
1522     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1523     ConstString description, bool is_global_property) {
1524   return CreateSettingForPlugin(debugger, ConstString(kPlatformPluginName),
1525                                 ConstString("Settings for platform plug-ins"),
1526                                 properties_sp, description, is_global_property,
1527                                 GetDebuggerPropertyForPluginsOldStyle);
1528 }
1529 
1530 lldb::OptionValuePropertiesSP
1531 PluginManager::GetSettingForProcessPlugin(Debugger &debugger,
1532                                           ConstString setting_name) {
1533   return GetSettingForPlugin(debugger, setting_name,
1534                              ConstString(kProcessPluginName));
1535 }
1536 
1537 bool PluginManager::CreateSettingForProcessPlugin(
1538     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1539     ConstString description, bool is_global_property) {
1540   return CreateSettingForPlugin(debugger, ConstString(kProcessPluginName),
1541                                 ConstString("Settings for process plug-ins"),
1542                                 properties_sp, description, is_global_property);
1543 }
1544 
1545 lldb::OptionValuePropertiesSP
1546 PluginManager::GetSettingForSymbolFilePlugin(Debugger &debugger,
1547                                              ConstString setting_name) {
1548   return GetSettingForPlugin(debugger, setting_name,
1549                              ConstString(kSymbolFilePluginName));
1550 }
1551 
1552 bool PluginManager::CreateSettingForSymbolFilePlugin(
1553     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1554     ConstString description, bool is_global_property) {
1555   return CreateSettingForPlugin(
1556       debugger, ConstString(kSymbolFilePluginName),
1557       ConstString("Settings for symbol file plug-ins"), properties_sp,
1558       description, is_global_property);
1559 }
1560 
1561 lldb::OptionValuePropertiesSP
1562 PluginManager::GetSettingForJITLoaderPlugin(Debugger &debugger,
1563                                             ConstString setting_name) {
1564   return GetSettingForPlugin(debugger, setting_name,
1565                              ConstString(kJITLoaderPluginName));
1566 }
1567 
1568 bool PluginManager::CreateSettingForJITLoaderPlugin(
1569     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1570     ConstString description, bool is_global_property) {
1571   return CreateSettingForPlugin(debugger, ConstString(kJITLoaderPluginName),
1572                                 ConstString("Settings for JIT loader plug-ins"),
1573                                 properties_sp, description, is_global_property);
1574 }
1575 
1576 static const char *kOperatingSystemPluginName("os");
1577 
1578 lldb::OptionValuePropertiesSP
1579 PluginManager::GetSettingForOperatingSystemPlugin(Debugger &debugger,
1580                                                   ConstString setting_name) {
1581   lldb::OptionValuePropertiesSP properties_sp;
1582   lldb::OptionValuePropertiesSP plugin_type_properties_sp(
1583       GetDebuggerPropertyForPlugins(
1584           debugger, ConstString(kOperatingSystemPluginName),
1585           ConstString(), // not creating to so we don't need the description
1586           false));
1587   if (plugin_type_properties_sp)
1588     properties_sp =
1589         plugin_type_properties_sp->GetSubProperty(nullptr, setting_name);
1590   return properties_sp;
1591 }
1592 
1593 bool PluginManager::CreateSettingForOperatingSystemPlugin(
1594     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1595     ConstString description, bool is_global_property) {
1596   if (properties_sp) {
1597     lldb::OptionValuePropertiesSP plugin_type_properties_sp(
1598         GetDebuggerPropertyForPlugins(
1599             debugger, ConstString(kOperatingSystemPluginName),
1600             ConstString("Settings for operating system plug-ins"), true));
1601     if (plugin_type_properties_sp) {
1602       plugin_type_properties_sp->AppendProperty(properties_sp->GetName(),
1603                                                 description, is_global_property,
1604                                                 properties_sp);
1605       return true;
1606     }
1607   }
1608   return false;
1609 }
1610 
1611 lldb::OptionValuePropertiesSP
1612 PluginManager::GetSettingForStructuredDataPlugin(Debugger &debugger,
1613                                                  ConstString setting_name) {
1614   return GetSettingForPlugin(debugger, setting_name,
1615                              ConstString(kStructuredDataPluginName));
1616 }
1617 
1618 bool PluginManager::CreateSettingForStructuredDataPlugin(
1619     Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
1620     ConstString description, bool is_global_property) {
1621   return CreateSettingForPlugin(
1622       debugger, ConstString(kStructuredDataPluginName),
1623       ConstString("Settings for structured data plug-ins"), properties_sp,
1624       description, is_global_property);
1625 }
1626