1 //===-- IRExecutionUnit.cpp -------------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/ExecutionEngine/ExecutionEngine.h"
11 #include "llvm/ExecutionEngine/ObjectCache.h"
12 #include "llvm/IR/Constants.h"
13 #include "llvm/IR/LLVMContext.h"
14 #include "llvm/IR/Module.h"
15 #include "llvm/Support/SourceMgr.h"
16 #include "llvm/Support/raw_ostream.h"
17 
18 #include "lldb/Core/Debugger.h"
19 #include "lldb/Core/Disassembler.h"
20 #include "lldb/Core/Module.h"
21 #include "lldb/Core/Section.h"
22 #include "lldb/Expression/IRExecutionUnit.h"
23 #include "lldb/Symbol/CompileUnit.h"
24 #include "lldb/Symbol/SymbolContext.h"
25 #include "lldb/Symbol/SymbolFile.h"
26 #include "lldb/Symbol/SymbolVendor.h"
27 #include "lldb/Target/ExecutionContext.h"
28 #include "lldb/Target/ObjCLanguageRuntime.h"
29 #include "lldb/Target/Target.h"
30 #include "lldb/Utility/DataBufferHeap.h"
31 #include "lldb/Utility/DataExtractor.h"
32 #include "lldb/Utility/LLDBAssert.h"
33 #include "lldb/Utility/Log.h"
34 
35 #include "lldb/../../source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h"
36 
37 using namespace lldb_private;
38 
39 IRExecutionUnit::IRExecutionUnit(std::unique_ptr<llvm::LLVMContext> &context_ap,
40                                  std::unique_ptr<llvm::Module> &module_ap,
41                                  ConstString &name,
42                                  const lldb::TargetSP &target_sp,
43                                  const SymbolContext &sym_ctx,
44                                  std::vector<std::string> &cpu_features)
45     : IRMemoryMap(target_sp), m_context_ap(context_ap.release()),
46       m_module_ap(module_ap.release()), m_module(m_module_ap.get()),
47       m_cpu_features(cpu_features), m_name(name), m_sym_ctx(sym_ctx),
48       m_did_jit(false), m_function_load_addr(LLDB_INVALID_ADDRESS),
49       m_function_end_load_addr(LLDB_INVALID_ADDRESS),
50       m_reported_allocations(false) {}
51 
52 lldb::addr_t IRExecutionUnit::WriteNow(const uint8_t *bytes, size_t size,
53                                        Status &error) {
54   const bool zero_memory = false;
55   lldb::addr_t allocation_process_addr =
56       Malloc(size, 8, lldb::ePermissionsWritable | lldb::ePermissionsReadable,
57              eAllocationPolicyMirror, zero_memory, error);
58 
59   if (!error.Success())
60     return LLDB_INVALID_ADDRESS;
61 
62   WriteMemory(allocation_process_addr, bytes, size, error);
63 
64   if (!error.Success()) {
65     Status err;
66     Free(allocation_process_addr, err);
67 
68     return LLDB_INVALID_ADDRESS;
69   }
70 
71   if (Log *log =
72           lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)) {
73     DataBufferHeap my_buffer(size, 0);
74     Status err;
75     ReadMemory(my_buffer.GetBytes(), allocation_process_addr, size, err);
76 
77     if (err.Success()) {
78       DataExtractor my_extractor(my_buffer.GetBytes(), my_buffer.GetByteSize(),
79                                  lldb::eByteOrderBig, 8);
80       my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(),
81                             allocation_process_addr, 16,
82                             DataExtractor::TypeUInt8);
83     }
84   }
85 
86   return allocation_process_addr;
87 }
88 
89 void IRExecutionUnit::FreeNow(lldb::addr_t allocation) {
90   if (allocation == LLDB_INVALID_ADDRESS)
91     return;
92 
93   Status err;
94 
95   Free(allocation, err);
96 }
97 
98 Status IRExecutionUnit::DisassembleFunction(Stream &stream,
99                                             lldb::ProcessSP &process_wp) {
100   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
101 
102   ExecutionContext exe_ctx(process_wp);
103 
104   Status ret;
105 
106   ret.Clear();
107 
108   lldb::addr_t func_local_addr = LLDB_INVALID_ADDRESS;
109   lldb::addr_t func_remote_addr = LLDB_INVALID_ADDRESS;
110 
111   for (JittedFunction &function : m_jitted_functions) {
112     if (function.m_name == m_name) {
113       func_local_addr = function.m_local_addr;
114       func_remote_addr = function.m_remote_addr;
115     }
116   }
117 
118   if (func_local_addr == LLDB_INVALID_ADDRESS) {
119     ret.SetErrorToGenericError();
120     ret.SetErrorStringWithFormat("Couldn't find function %s for disassembly",
121                                  m_name.AsCString());
122     return ret;
123   }
124 
125   if (log)
126     log->Printf("Found function, has local address 0x%" PRIx64
127                 " and remote address 0x%" PRIx64,
128                 (uint64_t)func_local_addr, (uint64_t)func_remote_addr);
129 
130   std::pair<lldb::addr_t, lldb::addr_t> func_range;
131 
132   func_range = GetRemoteRangeForLocal(func_local_addr);
133 
134   if (func_range.first == 0 && func_range.second == 0) {
135     ret.SetErrorToGenericError();
136     ret.SetErrorStringWithFormat("Couldn't find code range for function %s",
137                                  m_name.AsCString());
138     return ret;
139   }
140 
141   if (log)
142     log->Printf("Function's code range is [0x%" PRIx64 "+0x%" PRIx64 "]",
143                 func_range.first, func_range.second);
144 
145   Target *target = exe_ctx.GetTargetPtr();
146   if (!target) {
147     ret.SetErrorToGenericError();
148     ret.SetErrorString("Couldn't find the target");
149     return ret;
150   }
151 
152   lldb::DataBufferSP buffer_sp(new DataBufferHeap(func_range.second, 0));
153 
154   Process *process = exe_ctx.GetProcessPtr();
155   Status err;
156   process->ReadMemory(func_remote_addr, buffer_sp->GetBytes(),
157                       buffer_sp->GetByteSize(), err);
158 
159   if (!err.Success()) {
160     ret.SetErrorToGenericError();
161     ret.SetErrorStringWithFormat("Couldn't read from process: %s",
162                                  err.AsCString("unknown error"));
163     return ret;
164   }
165 
166   ArchSpec arch(target->GetArchitecture());
167 
168   const char *plugin_name = NULL;
169   const char *flavor_string = NULL;
170   lldb::DisassemblerSP disassembler_sp =
171       Disassembler::FindPlugin(arch, flavor_string, plugin_name);
172 
173   if (!disassembler_sp) {
174     ret.SetErrorToGenericError();
175     ret.SetErrorStringWithFormat(
176         "Unable to find disassembler plug-in for %s architecture.",
177         arch.GetArchitectureName());
178     return ret;
179   }
180 
181   if (!process) {
182     ret.SetErrorToGenericError();
183     ret.SetErrorString("Couldn't find the process");
184     return ret;
185   }
186 
187   DataExtractor extractor(buffer_sp, process->GetByteOrder(),
188                           target->GetArchitecture().GetAddressByteSize());
189 
190   if (log) {
191     log->Printf("Function data has contents:");
192     extractor.PutToLog(log, 0, extractor.GetByteSize(), func_remote_addr, 16,
193                        DataExtractor::TypeUInt8);
194   }
195 
196   disassembler_sp->DecodeInstructions(Address(func_remote_addr), extractor, 0,
197                                       UINT32_MAX, false, false);
198 
199   InstructionList &instruction_list = disassembler_sp->GetInstructionList();
200   instruction_list.Dump(&stream, true, true, &exe_ctx);
201   return ret;
202 }
203 
204 static void ReportInlineAsmError(const llvm::SMDiagnostic &diagnostic,
205                                  void *Context, unsigned LocCookie) {
206   Status *err = static_cast<Status *>(Context);
207 
208   if (err && err->Success()) {
209     err->SetErrorToGenericError();
210     err->SetErrorStringWithFormat("Inline assembly error: %s",
211                                   diagnostic.getMessage().str().c_str());
212   }
213 }
214 
215 void IRExecutionUnit::ReportSymbolLookupError(const ConstString &name) {
216   m_failed_lookups.push_back(name);
217 }
218 
219 void IRExecutionUnit::GetRunnableInfo(Status &error, lldb::addr_t &func_addr,
220                                       lldb::addr_t &func_end) {
221   lldb::ProcessSP process_sp(GetProcessWP().lock());
222 
223   static std::recursive_mutex s_runnable_info_mutex;
224 
225   func_addr = LLDB_INVALID_ADDRESS;
226   func_end = LLDB_INVALID_ADDRESS;
227 
228   if (!process_sp) {
229     error.SetErrorToGenericError();
230     error.SetErrorString("Couldn't write the JIT compiled code into the "
231                          "process because the process is invalid");
232     return;
233   }
234 
235   if (m_did_jit) {
236     func_addr = m_function_load_addr;
237     func_end = m_function_end_load_addr;
238 
239     return;
240   };
241 
242   std::lock_guard<std::recursive_mutex> guard(s_runnable_info_mutex);
243 
244   m_did_jit = true;
245 
246   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
247 
248   std::string error_string;
249 
250   if (log) {
251     std::string s;
252     llvm::raw_string_ostream oss(s);
253 
254     m_module->print(oss, NULL);
255 
256     oss.flush();
257 
258     log->Printf("Module being sent to JIT: \n%s", s.c_str());
259   }
260 
261   llvm::Triple triple(m_module->getTargetTriple());
262   llvm::Reloc::Model relocModel;
263 
264   if (triple.isOSBinFormatELF()) {
265     relocModel = llvm::Reloc::Static;
266   } else {
267     relocModel = llvm::Reloc::PIC_;
268   }
269 
270   m_module_ap->getContext().setInlineAsmDiagnosticHandler(ReportInlineAsmError,
271                                                           &error);
272 
273   llvm::EngineBuilder builder(std::move(m_module_ap));
274 
275   builder.setEngineKind(llvm::EngineKind::JIT)
276       .setErrorStr(&error_string)
277       .setRelocationModel(relocModel)
278       .setMCJITMemoryManager(
279           std::unique_ptr<MemoryManager>(new MemoryManager(*this)))
280       .setOptLevel(llvm::CodeGenOpt::Less);
281 
282   llvm::StringRef mArch;
283   llvm::StringRef mCPU;
284   llvm::SmallVector<std::string, 0> mAttrs;
285 
286   for (std::string &feature : m_cpu_features)
287     mAttrs.push_back(feature);
288 
289   llvm::TargetMachine *target_machine =
290       builder.selectTarget(triple, mArch, mCPU, mAttrs);
291 
292   m_execution_engine_ap.reset(builder.create(target_machine));
293 
294   m_strip_underscore =
295       (m_execution_engine_ap->getDataLayout().getGlobalPrefix() == '_');
296 
297   if (!m_execution_engine_ap.get()) {
298     error.SetErrorToGenericError();
299     error.SetErrorStringWithFormat("Couldn't JIT the function: %s",
300                                    error_string.c_str());
301     return;
302   }
303 
304   class ObjectDumper : public llvm::ObjectCache {
305   public:
306     void notifyObjectCompiled(const llvm::Module *module,
307                               llvm::MemoryBufferRef object) override {
308       int fd = 0;
309       llvm::SmallVector<char, 256> result_path;
310       std::string object_name_model =
311           "jit-object-" + module->getModuleIdentifier() + "-%%%.o";
312       (void)llvm::sys::fs::createUniqueFile(object_name_model, fd, result_path);
313       llvm::raw_fd_ostream fds(fd, true);
314       fds.write(object.getBufferStart(), object.getBufferSize());
315     }
316 
317     std::unique_ptr<llvm::MemoryBuffer>
318     getObject(const llvm::Module *module) override {
319       // Return nothing - we're just abusing the object-cache mechanism to dump
320       // objects.
321       return nullptr;
322     }
323   };
324 
325   if (process_sp->GetTarget().GetEnableSaveObjects()) {
326     m_object_cache_ap = llvm::make_unique<ObjectDumper>();
327     m_execution_engine_ap->setObjectCache(m_object_cache_ap.get());
328   }
329 
330   // Make sure we see all sections, including ones that don't have
331   // relocations...
332   m_execution_engine_ap->setProcessAllSections(true);
333 
334   m_execution_engine_ap->DisableLazyCompilation();
335 
336   for (llvm::Function &function : *m_module) {
337     if (function.isDeclaration() || function.hasPrivateLinkage())
338       continue;
339 
340     const bool external =
341         function.hasExternalLinkage() || function.hasLinkOnceODRLinkage();
342 
343     void *fun_ptr = m_execution_engine_ap->getPointerToFunction(&function);
344 
345     if (!error.Success()) {
346       // We got an error through our callback!
347       return;
348     }
349 
350     if (!fun_ptr) {
351       error.SetErrorToGenericError();
352       error.SetErrorStringWithFormat(
353           "'%s' was in the JITted module but wasn't lowered",
354           function.getName().str().c_str());
355       return;
356     }
357     m_jitted_functions.push_back(JittedFunction(
358         function.getName().str().c_str(), external, (lldb::addr_t)fun_ptr));
359   }
360 
361   CommitAllocations(process_sp);
362   ReportAllocations(*m_execution_engine_ap);
363 
364   // We have to do this after calling ReportAllocations because for the MCJIT,
365   // getGlobalValueAddress
366   // will cause the JIT to perform all relocations.  That can only be done once,
367   // and has to happen
368   // after we do the remapping from local -> remote.
369   // That means we don't know the local address of the Variables, but we don't
370   // need that for anything,
371   // so that's okay.
372 
373   std::function<void(llvm::GlobalValue &)> RegisterOneValue = [this](
374       llvm::GlobalValue &val) {
375     if (val.hasExternalLinkage() && !val.isDeclaration()) {
376       uint64_t var_ptr_addr =
377           m_execution_engine_ap->getGlobalValueAddress(val.getName().str());
378 
379       lldb::addr_t remote_addr = GetRemoteAddressForLocal(var_ptr_addr);
380 
381       // This is a really unfortunae API that sometimes returns local addresses
382       // and sometimes returns remote addresses, based on whether
383       // the variable was relocated during ReportAllocations or not.
384 
385       if (remote_addr == LLDB_INVALID_ADDRESS) {
386         remote_addr = var_ptr_addr;
387       }
388 
389       if (var_ptr_addr != 0)
390         m_jitted_global_variables.push_back(JittedGlobalVariable(
391             val.getName().str().c_str(), LLDB_INVALID_ADDRESS, remote_addr));
392     }
393   };
394 
395   for (llvm::GlobalVariable &global_var : m_module->getGlobalList()) {
396     RegisterOneValue(global_var);
397   }
398 
399   for (llvm::GlobalAlias &global_alias : m_module->getAliasList()) {
400     RegisterOneValue(global_alias);
401   }
402 
403   WriteData(process_sp);
404 
405   if (m_failed_lookups.size()) {
406     StreamString ss;
407 
408     ss.PutCString("Couldn't lookup symbols:\n");
409 
410     bool emitNewLine = false;
411 
412     for (const ConstString &failed_lookup : m_failed_lookups) {
413       if (emitNewLine)
414         ss.PutCString("\n");
415       emitNewLine = true;
416       ss.PutCString("  ");
417       ss.PutCString(Mangled(failed_lookup)
418                         .GetDemangledName(lldb::eLanguageTypeObjC_plus_plus)
419                         .AsCString());
420     }
421 
422     m_failed_lookups.clear();
423 
424     error.SetErrorString(ss.GetString());
425 
426     return;
427   }
428 
429   m_function_load_addr = LLDB_INVALID_ADDRESS;
430   m_function_end_load_addr = LLDB_INVALID_ADDRESS;
431 
432   for (JittedFunction &jitted_function : m_jitted_functions) {
433     jitted_function.m_remote_addr =
434         GetRemoteAddressForLocal(jitted_function.m_local_addr);
435 
436     if (!m_name.IsEmpty() && jitted_function.m_name == m_name) {
437       AddrRange func_range =
438           GetRemoteRangeForLocal(jitted_function.m_local_addr);
439       m_function_end_load_addr = func_range.first + func_range.second;
440       m_function_load_addr = jitted_function.m_remote_addr;
441     }
442   }
443 
444   if (log) {
445     log->Printf("Code can be run in the target.");
446 
447     StreamString disassembly_stream;
448 
449     Status err = DisassembleFunction(disassembly_stream, process_sp);
450 
451     if (!err.Success()) {
452       log->Printf("Couldn't disassemble function : %s",
453                   err.AsCString("unknown error"));
454     } else {
455       log->Printf("Function disassembly:\n%s", disassembly_stream.GetData());
456     }
457 
458     log->Printf("Sections: ");
459     for (AllocationRecord &record : m_records) {
460       if (record.m_process_address != LLDB_INVALID_ADDRESS) {
461         record.dump(log);
462 
463         DataBufferHeap my_buffer(record.m_size, 0);
464         Status err;
465         ReadMemory(my_buffer.GetBytes(), record.m_process_address,
466                    record.m_size, err);
467 
468         if (err.Success()) {
469           DataExtractor my_extractor(my_buffer.GetBytes(),
470                                      my_buffer.GetByteSize(),
471                                      lldb::eByteOrderBig, 8);
472           my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(),
473                                 record.m_process_address, 16,
474                                 DataExtractor::TypeUInt8);
475         }
476       } else {
477         record.dump(log);
478 
479         DataExtractor my_extractor((const void *)record.m_host_address,
480                                    record.m_size, lldb::eByteOrderBig, 8);
481         my_extractor.PutToLog(log, 0, record.m_size, record.m_host_address, 16,
482                               DataExtractor::TypeUInt8);
483       }
484     }
485   }
486 
487   func_addr = m_function_load_addr;
488   func_end = m_function_end_load_addr;
489 
490   return;
491 }
492 
493 IRExecutionUnit::~IRExecutionUnit() {
494   m_module_ap.reset();
495   m_execution_engine_ap.reset();
496   m_context_ap.reset();
497 }
498 
499 IRExecutionUnit::MemoryManager::MemoryManager(IRExecutionUnit &parent)
500     : m_default_mm_ap(new llvm::SectionMemoryManager()), m_parent(parent) {}
501 
502 IRExecutionUnit::MemoryManager::~MemoryManager() {}
503 
504 lldb::SectionType IRExecutionUnit::GetSectionTypeFromSectionName(
505     const llvm::StringRef &name, IRExecutionUnit::AllocationKind alloc_kind) {
506   lldb::SectionType sect_type = lldb::eSectionTypeCode;
507   switch (alloc_kind) {
508   case AllocationKind::Stub:
509     sect_type = lldb::eSectionTypeCode;
510     break;
511   case AllocationKind::Code:
512     sect_type = lldb::eSectionTypeCode;
513     break;
514   case AllocationKind::Data:
515     sect_type = lldb::eSectionTypeData;
516     break;
517   case AllocationKind::Global:
518     sect_type = lldb::eSectionTypeData;
519     break;
520   case AllocationKind::Bytes:
521     sect_type = lldb::eSectionTypeOther;
522     break;
523   }
524 
525   if (!name.empty()) {
526     if (name.equals("__text") || name.equals(".text"))
527       sect_type = lldb::eSectionTypeCode;
528     else if (name.equals("__data") || name.equals(".data"))
529       sect_type = lldb::eSectionTypeCode;
530     else if (name.startswith("__debug_") || name.startswith(".debug_")) {
531       const uint32_t name_idx = name[0] == '_' ? 8 : 7;
532       llvm::StringRef dwarf_name(name.substr(name_idx));
533       switch (dwarf_name[0]) {
534       case 'a':
535         if (dwarf_name.equals("abbrev"))
536           sect_type = lldb::eSectionTypeDWARFDebugAbbrev;
537         else if (dwarf_name.equals("aranges"))
538           sect_type = lldb::eSectionTypeDWARFDebugAranges;
539         else if (dwarf_name.equals("addr"))
540           sect_type = lldb::eSectionTypeDWARFDebugAddr;
541         break;
542 
543       case 'f':
544         if (dwarf_name.equals("frame"))
545           sect_type = lldb::eSectionTypeDWARFDebugFrame;
546         break;
547 
548       case 'i':
549         if (dwarf_name.equals("info"))
550           sect_type = lldb::eSectionTypeDWARFDebugInfo;
551         break;
552 
553       case 'l':
554         if (dwarf_name.equals("line"))
555           sect_type = lldb::eSectionTypeDWARFDebugLine;
556         else if (dwarf_name.equals("loc"))
557           sect_type = lldb::eSectionTypeDWARFDebugLoc;
558         break;
559 
560       case 'm':
561         if (dwarf_name.equals("macinfo"))
562           sect_type = lldb::eSectionTypeDWARFDebugMacInfo;
563         break;
564 
565       case 'p':
566         if (dwarf_name.equals("pubnames"))
567           sect_type = lldb::eSectionTypeDWARFDebugPubNames;
568         else if (dwarf_name.equals("pubtypes"))
569           sect_type = lldb::eSectionTypeDWARFDebugPubTypes;
570         break;
571 
572       case 's':
573         if (dwarf_name.equals("str"))
574           sect_type = lldb::eSectionTypeDWARFDebugStr;
575         else if (dwarf_name.equals("str_offsets"))
576           sect_type = lldb::eSectionTypeDWARFDebugStrOffsets;
577         break;
578 
579       case 'r':
580         if (dwarf_name.equals("ranges"))
581           sect_type = lldb::eSectionTypeDWARFDebugRanges;
582         break;
583 
584       default:
585         break;
586       }
587     } else if (name.startswith("__apple_") || name.startswith(".apple_")) {
588 #if 0
589             const uint32_t name_idx = name[0] == '_' ? 8 : 7;
590             llvm::StringRef apple_name(name.substr(name_idx));
591             switch (apple_name[0])
592             {
593                 case 'n':
594                     if (apple_name.equals("names"))
595                         sect_type = lldb::eSectionTypeDWARFAppleNames;
596                     else if (apple_name.equals("namespac") || apple_name.equals("namespaces"))
597                         sect_type = lldb::eSectionTypeDWARFAppleNamespaces;
598                     break;
599                 case 't':
600                     if (apple_name.equals("types"))
601                         sect_type = lldb::eSectionTypeDWARFAppleTypes;
602                     break;
603                 case 'o':
604                     if (apple_name.equals("objc"))
605                         sect_type = lldb::eSectionTypeDWARFAppleObjC;
606                     break;
607                 default:
608                     break;
609             }
610 #else
611       sect_type = lldb::eSectionTypeInvalid;
612 #endif
613     } else if (name.equals("__objc_imageinfo"))
614       sect_type = lldb::eSectionTypeOther;
615   }
616   return sect_type;
617 }
618 
619 uint8_t *IRExecutionUnit::MemoryManager::allocateCodeSection(
620     uintptr_t Size, unsigned Alignment, unsigned SectionID,
621     llvm::StringRef SectionName) {
622   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
623 
624   uint8_t *return_value = m_default_mm_ap->allocateCodeSection(
625       Size, Alignment, SectionID, SectionName);
626 
627   m_parent.m_records.push_back(AllocationRecord(
628       (uintptr_t)return_value,
629       lldb::ePermissionsReadable | lldb::ePermissionsExecutable,
630       GetSectionTypeFromSectionName(SectionName, AllocationKind::Code), Size,
631       Alignment, SectionID, SectionName.str().c_str()));
632 
633   if (log) {
634     log->Printf("IRExecutionUnit::allocateCodeSection(Size=0x%" PRIx64
635                 ", Alignment=%u, SectionID=%u) = %p",
636                 (uint64_t)Size, Alignment, SectionID, (void *)return_value);
637   }
638 
639   if (m_parent.m_reported_allocations) {
640     Status err;
641     lldb::ProcessSP process_sp =
642         m_parent.GetBestExecutionContextScope()->CalculateProcess();
643 
644     m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back());
645   }
646 
647   return return_value;
648 }
649 
650 uint8_t *IRExecutionUnit::MemoryManager::allocateDataSection(
651     uintptr_t Size, unsigned Alignment, unsigned SectionID,
652     llvm::StringRef SectionName, bool IsReadOnly) {
653   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
654 
655   uint8_t *return_value = m_default_mm_ap->allocateDataSection(
656       Size, Alignment, SectionID, SectionName, IsReadOnly);
657 
658   uint32_t permissions = lldb::ePermissionsReadable;
659   if (!IsReadOnly)
660     permissions |= lldb::ePermissionsWritable;
661   m_parent.m_records.push_back(AllocationRecord(
662       (uintptr_t)return_value, permissions,
663       GetSectionTypeFromSectionName(SectionName, AllocationKind::Data), Size,
664       Alignment, SectionID, SectionName.str().c_str()));
665   if (log) {
666     log->Printf("IRExecutionUnit::allocateDataSection(Size=0x%" PRIx64
667                 ", Alignment=%u, SectionID=%u) = %p",
668                 (uint64_t)Size, Alignment, SectionID, (void *)return_value);
669   }
670 
671   if (m_parent.m_reported_allocations) {
672     Status err;
673     lldb::ProcessSP process_sp =
674         m_parent.GetBestExecutionContextScope()->CalculateProcess();
675 
676     m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back());
677   }
678 
679   return return_value;
680 }
681 
682 static ConstString
683 FindBestAlternateMangledName(const ConstString &demangled,
684                              const lldb::LanguageType &lang_type,
685                              const SymbolContext &sym_ctx) {
686   CPlusPlusLanguage::MethodName cpp_name(demangled);
687   std::string scope_qualified_name = cpp_name.GetScopeQualifiedName();
688 
689   if (!scope_qualified_name.size())
690     return ConstString();
691 
692   if (!sym_ctx.module_sp)
693     return ConstString();
694 
695   SymbolVendor *sym_vendor = sym_ctx.module_sp->GetSymbolVendor();
696   if (!sym_vendor)
697     return ConstString();
698 
699   lldb_private::SymbolFile *sym_file = sym_vendor->GetSymbolFile();
700   if (!sym_file)
701     return ConstString();
702 
703   std::vector<ConstString> alternates;
704   sym_file->GetMangledNamesForFunction(scope_qualified_name, alternates);
705 
706   std::vector<ConstString> param_and_qual_matches;
707   std::vector<ConstString> param_matches;
708   for (size_t i = 0; i < alternates.size(); i++) {
709     ConstString alternate_mangled_name = alternates[i];
710     Mangled mangled(alternate_mangled_name, true);
711     ConstString demangled = mangled.GetDemangledName(lang_type);
712 
713     CPlusPlusLanguage::MethodName alternate_cpp_name(demangled);
714     if (!cpp_name.IsValid())
715       continue;
716 
717     if (alternate_cpp_name.GetArguments() == cpp_name.GetArguments()) {
718       if (alternate_cpp_name.GetQualifiers() == cpp_name.GetQualifiers())
719         param_and_qual_matches.push_back(alternate_mangled_name);
720       else
721         param_matches.push_back(alternate_mangled_name);
722     }
723   }
724 
725   if (param_and_qual_matches.size())
726     return param_and_qual_matches[0]; // It is assumed that there will be only
727                                       // one!
728   else if (param_matches.size())
729     return param_matches[0]; // Return one of them as a best match
730   else
731     return ConstString();
732 }
733 
734 struct IRExecutionUnit::SearchSpec {
735   ConstString name;
736   uint32_t mask;
737 
738   SearchSpec(ConstString n, uint32_t m = lldb::eFunctionNameTypeFull)
739       : name(n), mask(m) {}
740 };
741 
742 void IRExecutionUnit::CollectCandidateCNames(
743     std::vector<IRExecutionUnit::SearchSpec> &C_specs,
744     const ConstString &name) {
745   if (m_strip_underscore && name.AsCString()[0] == '_')
746     C_specs.insert(C_specs.begin(), ConstString(&name.AsCString()[1]));
747   C_specs.push_back(SearchSpec(name));
748 }
749 
750 void IRExecutionUnit::CollectCandidateCPlusPlusNames(
751     std::vector<IRExecutionUnit::SearchSpec> &CPP_specs,
752     const std::vector<SearchSpec> &C_specs, const SymbolContext &sc) {
753   for (const SearchSpec &C_spec : C_specs) {
754     const ConstString &name = C_spec.name;
755 
756     if (CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) {
757       Mangled mangled(name, true);
758       ConstString demangled =
759           mangled.GetDemangledName(lldb::eLanguageTypeC_plus_plus);
760 
761       if (demangled) {
762         ConstString best_alternate_mangled_name = FindBestAlternateMangledName(
763             demangled, lldb::eLanguageTypeC_plus_plus, sc);
764 
765         if (best_alternate_mangled_name) {
766           CPP_specs.push_back(best_alternate_mangled_name);
767         }
768 
769         CPP_specs.push_back(SearchSpec(demangled, lldb::eFunctionNameTypeFull));
770       }
771     }
772 
773     std::set<ConstString> alternates;
774     CPlusPlusLanguage::FindAlternateFunctionManglings(name, alternates);
775     CPP_specs.insert(CPP_specs.end(), alternates.begin(), alternates.end());
776   }
777 }
778 
779 void IRExecutionUnit::CollectFallbackNames(
780     std::vector<SearchSpec> &fallback_specs,
781     const std::vector<SearchSpec> &C_specs) {
782   // As a last-ditch fallback, try the base name for C++ names.  It's terrible,
783   // but the DWARF doesn't always encode "extern C" correctly.
784 
785   for (const SearchSpec &C_spec : C_specs) {
786     const ConstString &name = C_spec.name;
787 
788     if (CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) {
789       Mangled mangled_name(name);
790       ConstString demangled_name =
791           mangled_name.GetDemangledName(lldb::eLanguageTypeC_plus_plus);
792       if (!demangled_name.IsEmpty()) {
793         const char *demangled_cstr = demangled_name.AsCString();
794         const char *lparen_loc = strchr(demangled_cstr, '(');
795         if (lparen_loc) {
796           llvm::StringRef base_name(demangled_cstr,
797                                     lparen_loc - demangled_cstr);
798           fallback_specs.push_back(ConstString(base_name));
799         }
800       }
801     }
802   }
803 }
804 
805 lldb::addr_t IRExecutionUnit::FindInSymbols(
806     const std::vector<IRExecutionUnit::SearchSpec> &specs,
807     const lldb_private::SymbolContext &sc) {
808   Target *target = sc.target_sp.get();
809 
810   if (!target) {
811     // we shouldn't be doing any symbol lookup at all without a target
812     return LLDB_INVALID_ADDRESS;
813   }
814 
815   for (const SearchSpec &spec : specs) {
816     SymbolContextList sc_list;
817 
818     lldb::addr_t best_internal_load_address = LLDB_INVALID_ADDRESS;
819 
820     std::function<bool(lldb::addr_t &, SymbolContextList &,
821                        const lldb_private::SymbolContext &)>
822         get_external_load_address = [&best_internal_load_address, target](
823             lldb::addr_t &load_address, SymbolContextList &sc_list,
824             const lldb_private::SymbolContext &sc) -> lldb::addr_t {
825       load_address = LLDB_INVALID_ADDRESS;
826 
827       for (size_t si = 0, se = sc_list.GetSize(); si < se; ++si) {
828         SymbolContext candidate_sc;
829 
830         sc_list.GetContextAtIndex(si, candidate_sc);
831 
832         const bool is_external =
833             (candidate_sc.function) ||
834             (candidate_sc.symbol && candidate_sc.symbol->IsExternal());
835         if (candidate_sc.symbol) {
836           load_address = candidate_sc.symbol->ResolveCallableAddress(*target);
837 
838           if (load_address == LLDB_INVALID_ADDRESS) {
839             if (target->GetProcessSP())
840               load_address =
841                   candidate_sc.symbol->GetAddress().GetLoadAddress(target);
842             else
843               load_address = candidate_sc.symbol->GetAddress().GetFileAddress();
844           }
845         }
846 
847         if (load_address == LLDB_INVALID_ADDRESS && candidate_sc.function) {
848           if (target->GetProcessSP())
849             load_address = candidate_sc.function->GetAddressRange()
850                                .GetBaseAddress()
851                                .GetLoadAddress(target);
852           else
853             load_address = candidate_sc.function->GetAddressRange()
854                                .GetBaseAddress()
855                                .GetFileAddress();
856         }
857 
858         if (load_address != LLDB_INVALID_ADDRESS) {
859           if (is_external) {
860             return true;
861           } else if (best_internal_load_address == LLDB_INVALID_ADDRESS) {
862             best_internal_load_address = load_address;
863             load_address = LLDB_INVALID_ADDRESS;
864           }
865         }
866       }
867 
868       return false;
869     };
870 
871     if (sc.module_sp) {
872       sc.module_sp->FindFunctions(spec.name, NULL, spec.mask,
873                                   true,  // include_symbols
874                                   false, // include_inlines
875                                   true,  // append
876                                   sc_list);
877     }
878 
879     lldb::addr_t load_address = LLDB_INVALID_ADDRESS;
880 
881     if (get_external_load_address(load_address, sc_list, sc)) {
882       return load_address;
883     } else {
884       sc_list.Clear();
885     }
886 
887     if (sc_list.GetSize() == 0 && sc.target_sp) {
888       sc.target_sp->GetImages().FindFunctions(spec.name, spec.mask,
889                                               true,  // include_symbols
890                                               false, // include_inlines
891                                               true,  // append
892                                               sc_list);
893     }
894 
895     if (get_external_load_address(load_address, sc_list, sc)) {
896       return load_address;
897     } else {
898       sc_list.Clear();
899     }
900 
901     if (sc_list.GetSize() == 0 && sc.target_sp) {
902       sc.target_sp->GetImages().FindSymbolsWithNameAndType(
903           spec.name, lldb::eSymbolTypeAny, sc_list);
904     }
905 
906     if (get_external_load_address(load_address, sc_list, sc)) {
907       return load_address;
908     }
909     // if there are any searches we try after this, add an sc_list.Clear() in an
910     // "else" clause here
911 
912     if (best_internal_load_address != LLDB_INVALID_ADDRESS) {
913       return best_internal_load_address;
914     }
915   }
916 
917   return LLDB_INVALID_ADDRESS;
918 }
919 
920 lldb::addr_t
921 IRExecutionUnit::FindInRuntimes(const std::vector<SearchSpec> &specs,
922                                 const lldb_private::SymbolContext &sc) {
923   lldb::TargetSP target_sp = sc.target_sp;
924 
925   if (!target_sp) {
926     return LLDB_INVALID_ADDRESS;
927   }
928 
929   lldb::ProcessSP process_sp = sc.target_sp->GetProcessSP();
930 
931   if (!process_sp) {
932     return LLDB_INVALID_ADDRESS;
933   }
934 
935   ObjCLanguageRuntime *runtime = process_sp->GetObjCLanguageRuntime();
936 
937   if (runtime) {
938     for (const SearchSpec &spec : specs) {
939       lldb::addr_t symbol_load_addr = runtime->LookupRuntimeSymbol(spec.name);
940 
941       if (symbol_load_addr != LLDB_INVALID_ADDRESS)
942         return symbol_load_addr;
943     }
944   }
945 
946   return LLDB_INVALID_ADDRESS;
947 }
948 
949 lldb::addr_t IRExecutionUnit::FindInUserDefinedSymbols(
950     const std::vector<SearchSpec> &specs,
951     const lldb_private::SymbolContext &sc) {
952   lldb::TargetSP target_sp = sc.target_sp;
953 
954   for (const SearchSpec &spec : specs) {
955     lldb::addr_t symbol_load_addr = target_sp->GetPersistentSymbol(spec.name);
956 
957     if (symbol_load_addr != LLDB_INVALID_ADDRESS)
958       return symbol_load_addr;
959   }
960 
961   return LLDB_INVALID_ADDRESS;
962 }
963 
964 lldb::addr_t
965 IRExecutionUnit::FindSymbol(const lldb_private::ConstString &name) {
966   std::vector<SearchSpec> candidate_C_names;
967   std::vector<SearchSpec> candidate_CPlusPlus_names;
968 
969   CollectCandidateCNames(candidate_C_names, name);
970 
971   lldb::addr_t ret = FindInSymbols(candidate_C_names, m_sym_ctx);
972   if (ret == LLDB_INVALID_ADDRESS)
973     ret = FindInRuntimes(candidate_C_names, m_sym_ctx);
974 
975   if (ret == LLDB_INVALID_ADDRESS)
976     ret = FindInUserDefinedSymbols(candidate_C_names, m_sym_ctx);
977 
978   if (ret == LLDB_INVALID_ADDRESS) {
979     CollectCandidateCPlusPlusNames(candidate_CPlusPlus_names, candidate_C_names,
980                                    m_sym_ctx);
981     ret = FindInSymbols(candidate_CPlusPlus_names, m_sym_ctx);
982   }
983 
984   if (ret == LLDB_INVALID_ADDRESS) {
985     std::vector<SearchSpec> candidate_fallback_names;
986 
987     CollectFallbackNames(candidate_fallback_names, candidate_C_names);
988     ret = FindInSymbols(candidate_fallback_names, m_sym_ctx);
989   }
990 
991   return ret;
992 }
993 
994 void IRExecutionUnit::GetStaticInitializers(
995     std::vector<lldb::addr_t> &static_initializers) {
996   if (llvm::GlobalVariable *global_ctors =
997           m_module->getNamedGlobal("llvm.global_ctors")) {
998     if (llvm::ConstantArray *ctor_array = llvm::dyn_cast<llvm::ConstantArray>(
999             global_ctors->getInitializer())) {
1000       for (llvm::Use &ctor_use : ctor_array->operands()) {
1001         if (llvm::ConstantStruct *ctor_struct =
1002                 llvm::dyn_cast<llvm::ConstantStruct>(ctor_use)) {
1003           lldbassert(ctor_struct->getNumOperands() ==
1004                      3); // this is standardized
1005           if (llvm::Function *ctor_function =
1006                   llvm::dyn_cast<llvm::Function>(ctor_struct->getOperand(1))) {
1007             ConstString ctor_function_name_cs(ctor_function->getName().str());
1008 
1009             for (JittedFunction &jitted_function : m_jitted_functions) {
1010               if (ctor_function_name_cs == jitted_function.m_name) {
1011                 if (jitted_function.m_remote_addr != LLDB_INVALID_ADDRESS) {
1012                   static_initializers.push_back(jitted_function.m_remote_addr);
1013                 }
1014                 break;
1015               }
1016             }
1017           }
1018         }
1019       }
1020     }
1021   }
1022 }
1023 
1024 uint64_t
1025 IRExecutionUnit::MemoryManager::getSymbolAddress(const std::string &Name) {
1026   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
1027 
1028   ConstString name_cs(Name.c_str());
1029 
1030   lldb::addr_t ret = m_parent.FindSymbol(name_cs);
1031 
1032   if (ret == LLDB_INVALID_ADDRESS) {
1033     if (log)
1034       log->Printf(
1035           "IRExecutionUnit::getSymbolAddress(Name=\"%s\") = <not found>",
1036           Name.c_str());
1037 
1038     m_parent.ReportSymbolLookupError(name_cs);
1039     return 0xbad0bad0;
1040   } else {
1041     if (log)
1042       log->Printf("IRExecutionUnit::getSymbolAddress(Name=\"%s\") = %" PRIx64,
1043                   Name.c_str(), ret);
1044     return ret;
1045   }
1046 }
1047 
1048 void *IRExecutionUnit::MemoryManager::getPointerToNamedFunction(
1049     const std::string &Name, bool AbortOnFailure) {
1050   assert(sizeof(void *) == 8);
1051 
1052   return (void *)getSymbolAddress(Name);
1053 }
1054 
1055 lldb::addr_t
1056 IRExecutionUnit::GetRemoteAddressForLocal(lldb::addr_t local_address) {
1057   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
1058 
1059   for (AllocationRecord &record : m_records) {
1060     if (local_address >= record.m_host_address &&
1061         local_address < record.m_host_address + record.m_size) {
1062       if (record.m_process_address == LLDB_INVALID_ADDRESS)
1063         return LLDB_INVALID_ADDRESS;
1064 
1065       lldb::addr_t ret =
1066           record.m_process_address + (local_address - record.m_host_address);
1067 
1068       if (log) {
1069         log->Printf(
1070             "IRExecutionUnit::GetRemoteAddressForLocal() found 0x%" PRIx64
1071             " in [0x%" PRIx64 "..0x%" PRIx64 "], and returned 0x%" PRIx64
1072             " from [0x%" PRIx64 "..0x%" PRIx64 "].",
1073             local_address, (uint64_t)record.m_host_address,
1074             (uint64_t)record.m_host_address + (uint64_t)record.m_size, ret,
1075             record.m_process_address, record.m_process_address + record.m_size);
1076       }
1077 
1078       return ret;
1079     }
1080   }
1081 
1082   return LLDB_INVALID_ADDRESS;
1083 }
1084 
1085 IRExecutionUnit::AddrRange
1086 IRExecutionUnit::GetRemoteRangeForLocal(lldb::addr_t local_address) {
1087   for (AllocationRecord &record : m_records) {
1088     if (local_address >= record.m_host_address &&
1089         local_address < record.m_host_address + record.m_size) {
1090       if (record.m_process_address == LLDB_INVALID_ADDRESS)
1091         return AddrRange(0, 0);
1092 
1093       return AddrRange(record.m_process_address, record.m_size);
1094     }
1095   }
1096 
1097   return AddrRange(0, 0);
1098 }
1099 
1100 bool IRExecutionUnit::CommitOneAllocation(lldb::ProcessSP &process_sp,
1101                                           Status &error,
1102                                           AllocationRecord &record) {
1103   if (record.m_process_address != LLDB_INVALID_ADDRESS) {
1104     return true;
1105   }
1106 
1107   switch (record.m_sect_type) {
1108   case lldb::eSectionTypeInvalid:
1109   case lldb::eSectionTypeDWARFDebugAbbrev:
1110   case lldb::eSectionTypeDWARFDebugAddr:
1111   case lldb::eSectionTypeDWARFDebugAranges:
1112   case lldb::eSectionTypeDWARFDebugCuIndex:
1113   case lldb::eSectionTypeDWARFDebugFrame:
1114   case lldb::eSectionTypeDWARFDebugInfo:
1115   case lldb::eSectionTypeDWARFDebugLine:
1116   case lldb::eSectionTypeDWARFDebugLoc:
1117   case lldb::eSectionTypeDWARFDebugMacInfo:
1118   case lldb::eSectionTypeDWARFDebugPubNames:
1119   case lldb::eSectionTypeDWARFDebugPubTypes:
1120   case lldb::eSectionTypeDWARFDebugRanges:
1121   case lldb::eSectionTypeDWARFDebugStr:
1122   case lldb::eSectionTypeDWARFDebugStrOffsets:
1123   case lldb::eSectionTypeDWARFAppleNames:
1124   case lldb::eSectionTypeDWARFAppleTypes:
1125   case lldb::eSectionTypeDWARFAppleNamespaces:
1126   case lldb::eSectionTypeDWARFAppleObjC:
1127     error.Clear();
1128     break;
1129   default:
1130     const bool zero_memory = false;
1131     record.m_process_address =
1132         Malloc(record.m_size, record.m_alignment, record.m_permissions,
1133                eAllocationPolicyProcessOnly, zero_memory, error);
1134     break;
1135   }
1136 
1137   return error.Success();
1138 }
1139 
1140 bool IRExecutionUnit::CommitAllocations(lldb::ProcessSP &process_sp) {
1141   bool ret = true;
1142 
1143   lldb_private::Status err;
1144 
1145   for (AllocationRecord &record : m_records) {
1146     ret = CommitOneAllocation(process_sp, err, record);
1147 
1148     if (!ret) {
1149       break;
1150     }
1151   }
1152 
1153   if (!ret) {
1154     for (AllocationRecord &record : m_records) {
1155       if (record.m_process_address != LLDB_INVALID_ADDRESS) {
1156         Free(record.m_process_address, err);
1157         record.m_process_address = LLDB_INVALID_ADDRESS;
1158       }
1159     }
1160   }
1161 
1162   return ret;
1163 }
1164 
1165 void IRExecutionUnit::ReportAllocations(llvm::ExecutionEngine &engine) {
1166   m_reported_allocations = true;
1167 
1168   for (AllocationRecord &record : m_records) {
1169     if (record.m_process_address == LLDB_INVALID_ADDRESS)
1170       continue;
1171 
1172     if (record.m_section_id == eSectionIDInvalid)
1173       continue;
1174 
1175     engine.mapSectionAddress((void *)record.m_host_address,
1176                              record.m_process_address);
1177   }
1178 
1179   // Trigger re-application of relocations.
1180   engine.finalizeObject();
1181 }
1182 
1183 bool IRExecutionUnit::WriteData(lldb::ProcessSP &process_sp) {
1184   bool wrote_something = false;
1185   for (AllocationRecord &record : m_records) {
1186     if (record.m_process_address != LLDB_INVALID_ADDRESS) {
1187       lldb_private::Status err;
1188       WriteMemory(record.m_process_address, (uint8_t *)record.m_host_address,
1189                   record.m_size, err);
1190       if (err.Success())
1191         wrote_something = true;
1192     }
1193   }
1194   return wrote_something;
1195 }
1196 
1197 void IRExecutionUnit::AllocationRecord::dump(Log *log) {
1198   if (!log)
1199     return;
1200 
1201   log->Printf("[0x%llx+0x%llx]->0x%llx (alignment %d, section ID %d, name %s)",
1202               (unsigned long long)m_host_address, (unsigned long long)m_size,
1203               (unsigned long long)m_process_address, (unsigned)m_alignment,
1204               (unsigned)m_section_id, m_name.c_str());
1205 }
1206 
1207 lldb::ByteOrder IRExecutionUnit::GetByteOrder() const {
1208   ExecutionContext exe_ctx(GetBestExecutionContextScope());
1209   return exe_ctx.GetByteOrder();
1210 }
1211 
1212 uint32_t IRExecutionUnit::GetAddressByteSize() const {
1213   ExecutionContext exe_ctx(GetBestExecutionContextScope());
1214   return exe_ctx.GetAddressByteSize();
1215 }
1216 
1217 void IRExecutionUnit::PopulateSymtab(lldb_private::ObjectFile *obj_file,
1218                                      lldb_private::Symtab &symtab) {
1219   // No symbols yet...
1220 }
1221 
1222 void IRExecutionUnit::PopulateSectionList(
1223     lldb_private::ObjectFile *obj_file,
1224     lldb_private::SectionList &section_list) {
1225   for (AllocationRecord &record : m_records) {
1226     if (record.m_size > 0) {
1227       lldb::SectionSP section_sp(new lldb_private::Section(
1228           obj_file->GetModule(), obj_file, record.m_section_id,
1229           ConstString(record.m_name), record.m_sect_type,
1230           record.m_process_address, record.m_size,
1231           record.m_host_address, // file_offset (which is the host address for
1232                                  // the data)
1233           record.m_size,         // file_size
1234           0,
1235           record.m_permissions)); // flags
1236       section_list.AddSection(section_sp);
1237     }
1238   }
1239 }
1240 
1241 bool IRExecutionUnit::GetArchitecture(lldb_private::ArchSpec &arch) {
1242   ExecutionContext exe_ctx(GetBestExecutionContextScope());
1243   Target *target = exe_ctx.GetTargetPtr();
1244   if (target)
1245     arch = target->GetArchitecture();
1246   else
1247     arch.Clear();
1248   return arch.IsValid();
1249 }
1250 
1251 lldb::ModuleSP IRExecutionUnit::GetJITModule() {
1252   ExecutionContext exe_ctx(GetBestExecutionContextScope());
1253   Target *target = exe_ctx.GetTargetPtr();
1254   if (target) {
1255     lldb::ModuleSP jit_module_sp = lldb_private::Module::CreateJITModule(
1256         std::static_pointer_cast<lldb_private::ObjectFileJITDelegate>(
1257             shared_from_this()));
1258     if (jit_module_sp) {
1259       bool changed = false;
1260       jit_module_sp->SetLoadAddress(*target, 0, true, changed);
1261     }
1262     return jit_module_sp;
1263   }
1264   return lldb::ModuleSP();
1265 }
1266