1 //===-- ProcessMinidump.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 "ProcessMinidump.h"
10
11 #include "ThreadMinidump.h"
12
13 #include "lldb/Core/DumpDataExtractor.h"
14 #include "lldb/Core/Module.h"
15 #include "lldb/Core/ModuleSpec.h"
16 #include "lldb/Core/PluginManager.h"
17 #include "lldb/Core/Section.h"
18 #include "lldb/Interpreter/CommandInterpreter.h"
19 #include "lldb/Interpreter/CommandObject.h"
20 #include "lldb/Interpreter/CommandObjectMultiword.h"
21 #include "lldb/Interpreter/CommandReturnObject.h"
22 #include "lldb/Interpreter/OptionArgParser.h"
23 #include "lldb/Interpreter/OptionGroupBoolean.h"
24 #include "lldb/Target/JITLoaderList.h"
25 #include "lldb/Target/MemoryRegionInfo.h"
26 #include "lldb/Target/SectionLoadList.h"
27 #include "lldb/Target/Target.h"
28 #include "lldb/Target/UnixSignals.h"
29 #include "lldb/Utility/LLDBAssert.h"
30 #include "lldb/Utility/Log.h"
31 #include "lldb/Utility/State.h"
32 #include "llvm/BinaryFormat/Magic.h"
33 #include "llvm/Support/MemoryBuffer.h"
34 #include "llvm/Support/Threading.h"
35
36 #include "Plugins/Process/Utility/StopInfoMachException.h"
37
38 #include <memory>
39
40 using namespace lldb;
41 using namespace lldb_private;
42 using namespace minidump;
43
44 LLDB_PLUGIN_DEFINE(ProcessMinidump)
45
46 namespace {
47
48 /// A minimal ObjectFile implementation providing a dummy object file for the
49 /// cases when the real module binary is not available. This allows the module
50 /// to show up in "image list" and symbols to be added to it.
51 class PlaceholderObjectFile : public ObjectFile {
52 public:
PlaceholderObjectFile(const lldb::ModuleSP & module_sp,const ModuleSpec & module_spec,lldb::addr_t base,lldb::addr_t size)53 PlaceholderObjectFile(const lldb::ModuleSP &module_sp,
54 const ModuleSpec &module_spec, lldb::addr_t base,
55 lldb::addr_t size)
56 : ObjectFile(module_sp, &module_spec.GetFileSpec(), /*file_offset*/ 0,
57 /*length*/ 0, /*data_sp*/ nullptr, /*data_offset*/ 0),
58 m_arch(module_spec.GetArchitecture()), m_uuid(module_spec.GetUUID()),
59 m_base(base), m_size(size) {
60 m_symtab_up = std::make_unique<Symtab>(this);
61 }
62
GetStaticPluginName()63 static ConstString GetStaticPluginName() {
64 return ConstString("placeholder");
65 }
GetPluginName()66 ConstString GetPluginName() override { return GetStaticPluginName(); }
GetPluginVersion()67 uint32_t GetPluginVersion() override { return 1; }
ParseHeader()68 bool ParseHeader() override { return true; }
CalculateType()69 Type CalculateType() override { return eTypeUnknown; }
CalculateStrata()70 Strata CalculateStrata() override { return eStrataUnknown; }
GetDependentModules(FileSpecList & file_list)71 uint32_t GetDependentModules(FileSpecList &file_list) override { return 0; }
IsExecutable() const72 bool IsExecutable() const override { return false; }
GetArchitecture()73 ArchSpec GetArchitecture() override { return m_arch; }
GetUUID()74 UUID GetUUID() override { return m_uuid; }
GetSymtab()75 Symtab *GetSymtab() override { return m_symtab_up.get(); }
IsStripped()76 bool IsStripped() override { return true; }
GetByteOrder() const77 ByteOrder GetByteOrder() const override { return m_arch.GetByteOrder(); }
78
GetAddressByteSize() const79 uint32_t GetAddressByteSize() const override {
80 return m_arch.GetAddressByteSize();
81 }
82
GetBaseAddress()83 Address GetBaseAddress() override {
84 return Address(m_sections_up->GetSectionAtIndex(0), 0);
85 }
86
CreateSections(SectionList & unified_section_list)87 void CreateSections(SectionList &unified_section_list) override {
88 m_sections_up = std::make_unique<SectionList>();
89 auto section_sp = std::make_shared<Section>(
90 GetModule(), this, /*sect_id*/ 0, ConstString(".module_image"),
91 eSectionTypeOther, m_base, m_size, /*file_offset*/ 0, /*file_size*/ 0,
92 /*log2align*/ 0, /*flags*/ 0);
93 section_sp->SetPermissions(ePermissionsReadable | ePermissionsExecutable);
94 m_sections_up->AddSection(section_sp);
95 unified_section_list.AddSection(std::move(section_sp));
96 }
97
SetLoadAddress(Target & target,addr_t value,bool value_is_offset)98 bool SetLoadAddress(Target &target, addr_t value,
99 bool value_is_offset) override {
100 assert(!value_is_offset);
101 assert(value == m_base);
102
103 // Create sections if they haven't been created already.
104 GetModule()->GetSectionList();
105 assert(m_sections_up->GetNumSections(0) == 1);
106
107 target.GetSectionLoadList().SetSectionLoadAddress(
108 m_sections_up->GetSectionAtIndex(0), m_base);
109 return true;
110 }
111
Dump(Stream * s)112 void Dump(Stream *s) override {
113 s->Format("Placeholder object file for {0} loaded at [{1:x}-{2:x})\n",
114 GetFileSpec(), m_base, m_base + m_size);
115 }
116
GetBaseImageAddress() const117 lldb::addr_t GetBaseImageAddress() const { return m_base; }
118 private:
119 ArchSpec m_arch;
120 UUID m_uuid;
121 lldb::addr_t m_base;
122 lldb::addr_t m_size;
123 };
124
125 /// Duplicate the HashElfTextSection() from the breakpad sources.
126 ///
127 /// Breakpad, a Google crash log reporting tool suite, creates minidump files
128 /// for many different architectures. When using Breakpad to create ELF
129 /// minidumps, it will check for a GNU build ID when creating a minidump file
130 /// and if one doesn't exist in the file, it will say the UUID of the file is a
131 /// checksum of up to the first 4096 bytes of the .text section. Facebook also
132 /// uses breakpad and modified this hash to avoid collisions so we can
133 /// calculate and check for this as well.
134 ///
135 /// The breakpad code might end up hashing up to 15 bytes that immediately
136 /// follow the .text section in the file, so this code must do exactly what it
137 /// does so we can get an exact match for the UUID.
138 ///
139 /// \param[in] module_sp The module to grab the .text section from.
140 ///
141 /// \param[in/out] breakpad_uuid A vector that will receive the calculated
142 /// breakpad .text hash.
143 ///
144 /// \param[in/out] facebook_uuid A vector that will receive the calculated
145 /// facebook .text hash.
146 ///
HashElfTextSection(ModuleSP module_sp,std::vector<uint8_t> & breakpad_uuid,std::vector<uint8_t> & facebook_uuid)147 void HashElfTextSection(ModuleSP module_sp, std::vector<uint8_t> &breakpad_uuid,
148 std::vector<uint8_t> &facebook_uuid) {
149 SectionList *sect_list = module_sp->GetSectionList();
150 if (sect_list == nullptr)
151 return;
152 SectionSP sect_sp = sect_list->FindSectionByName(ConstString(".text"));
153 if (!sect_sp)
154 return;
155 constexpr size_t kMDGUIDSize = 16;
156 constexpr size_t kBreakpadPageSize = 4096;
157 // The breakpad code has a bug where it might access beyond the end of a
158 // .text section by up to 15 bytes, so we must ensure we round up to the
159 // next kMDGUIDSize byte boundary.
160 DataExtractor data;
161 const size_t text_size = sect_sp->GetFileSize();
162 const size_t read_size = std::min<size_t>(
163 llvm::alignTo(text_size, kMDGUIDSize), kBreakpadPageSize);
164 sect_sp->GetObjectFile()->GetData(sect_sp->GetFileOffset(), read_size, data);
165
166 breakpad_uuid.assign(kMDGUIDSize, 0);
167 facebook_uuid.assign(kMDGUIDSize, 0);
168
169 // The only difference between the breakpad hash and the facebook hash is the
170 // hashing of the text section size into the hash prior to hashing the .text
171 // contents.
172 for (size_t i = 0; i < kMDGUIDSize; i++)
173 facebook_uuid[i] ^= text_size % 255;
174
175 // This code carefully duplicates how the hash was created in Breakpad
176 // sources, including the error where it might has an extra 15 bytes past the
177 // end of the .text section if the .text section is less than a page size in
178 // length.
179 const uint8_t *ptr = data.GetDataStart();
180 const uint8_t *ptr_end = data.GetDataEnd();
181 while (ptr < ptr_end) {
182 for (unsigned i = 0; i < kMDGUIDSize; i++) {
183 breakpad_uuid[i] ^= ptr[i];
184 facebook_uuid[i] ^= ptr[i];
185 }
186 ptr += kMDGUIDSize;
187 }
188 }
189
190 } // namespace
191
GetPluginNameStatic()192 ConstString ProcessMinidump::GetPluginNameStatic() {
193 static ConstString g_name("minidump");
194 return g_name;
195 }
196
GetPluginDescriptionStatic()197 const char *ProcessMinidump::GetPluginDescriptionStatic() {
198 return "Minidump plug-in.";
199 }
200
CreateInstance(lldb::TargetSP target_sp,lldb::ListenerSP listener_sp,const FileSpec * crash_file,bool can_connect)201 lldb::ProcessSP ProcessMinidump::CreateInstance(lldb::TargetSP target_sp,
202 lldb::ListenerSP listener_sp,
203 const FileSpec *crash_file,
204 bool can_connect) {
205 if (!crash_file || can_connect)
206 return nullptr;
207
208 lldb::ProcessSP process_sp;
209 // Read enough data for the Minidump header
210 constexpr size_t header_size = sizeof(Header);
211 auto DataPtr = FileSystem::Instance().CreateDataBuffer(crash_file->GetPath(),
212 header_size, 0);
213 if (!DataPtr)
214 return nullptr;
215
216 lldbassert(DataPtr->GetByteSize() == header_size);
217 if (identify_magic(toStringRef(DataPtr->GetData())) != llvm::file_magic::minidump)
218 return nullptr;
219
220 auto AllData =
221 FileSystem::Instance().CreateDataBuffer(crash_file->GetPath(), -1, 0);
222 if (!AllData)
223 return nullptr;
224
225 return std::make_shared<ProcessMinidump>(target_sp, listener_sp, *crash_file,
226 std::move(AllData));
227 }
228
CanDebug(lldb::TargetSP target_sp,bool plugin_specified_by_name)229 bool ProcessMinidump::CanDebug(lldb::TargetSP target_sp,
230 bool plugin_specified_by_name) {
231 return true;
232 }
233
ProcessMinidump(lldb::TargetSP target_sp,lldb::ListenerSP listener_sp,const FileSpec & core_file,DataBufferSP core_data)234 ProcessMinidump::ProcessMinidump(lldb::TargetSP target_sp,
235 lldb::ListenerSP listener_sp,
236 const FileSpec &core_file,
237 DataBufferSP core_data)
238 : PostMortemProcess(target_sp, listener_sp), m_core_file(core_file),
239 m_core_data(std::move(core_data)), m_is_wow64(false) {}
240
~ProcessMinidump()241 ProcessMinidump::~ProcessMinidump() {
242 Clear();
243 // We need to call finalize on the process before destroying ourselves to
244 // make sure all of the broadcaster cleanup goes as planned. If we destruct
245 // this class, then Process::~Process() might have problems trying to fully
246 // destroy the broadcaster.
247 Finalize();
248 }
249
Initialize()250 void ProcessMinidump::Initialize() {
251 static llvm::once_flag g_once_flag;
252
253 llvm::call_once(g_once_flag, []() {
254 PluginManager::RegisterPlugin(GetPluginNameStatic(),
255 GetPluginDescriptionStatic(),
256 ProcessMinidump::CreateInstance);
257 });
258 }
259
Terminate()260 void ProcessMinidump::Terminate() {
261 PluginManager::UnregisterPlugin(ProcessMinidump::CreateInstance);
262 }
263
DoLoadCore()264 Status ProcessMinidump::DoLoadCore() {
265 auto expected_parser = MinidumpParser::Create(m_core_data);
266 if (!expected_parser)
267 return Status(expected_parser.takeError());
268 m_minidump_parser = std::move(*expected_parser);
269
270 Status error;
271
272 // Do we support the minidump's architecture?
273 ArchSpec arch = GetArchitecture();
274 switch (arch.GetMachine()) {
275 case llvm::Triple::x86:
276 case llvm::Triple::x86_64:
277 case llvm::Triple::arm:
278 case llvm::Triple::aarch64:
279 // Any supported architectures must be listed here and also supported in
280 // ThreadMinidump::CreateRegisterContextForFrame().
281 break;
282 default:
283 error.SetErrorStringWithFormat("unsupported minidump architecture: %s",
284 arch.GetArchitectureName());
285 return error;
286 }
287 GetTarget().SetArchitecture(arch, true /*set_platform*/);
288
289 m_thread_list = m_minidump_parser->GetThreads();
290 m_active_exception = m_minidump_parser->GetExceptionStream();
291
292 SetUnixSignals(UnixSignals::Create(GetArchitecture()));
293
294 ReadModuleList();
295
296 llvm::Optional<lldb::pid_t> pid = m_minidump_parser->GetPid();
297 if (!pid) {
298 GetTarget().GetDebugger().GetAsyncErrorStream()->PutCString(
299 "Unable to retrieve process ID from minidump file, setting process ID "
300 "to 1.\n");
301 pid = 1;
302 }
303 SetID(pid.getValue());
304
305 return error;
306 }
307
GetPluginName()308 ConstString ProcessMinidump::GetPluginName() { return GetPluginNameStatic(); }
309
GetPluginVersion()310 uint32_t ProcessMinidump::GetPluginVersion() { return 1; }
311
DoDestroy()312 Status ProcessMinidump::DoDestroy() { return Status(); }
313
RefreshStateAfterStop()314 void ProcessMinidump::RefreshStateAfterStop() {
315
316 if (!m_active_exception)
317 return;
318
319 constexpr uint32_t BreakpadDumpRequested = 0xFFFFFFFF;
320 if (m_active_exception->ExceptionRecord.ExceptionCode ==
321 BreakpadDumpRequested) {
322 // This "ExceptionCode" value is a sentinel that is sometimes used
323 // when generating a dump for a process that hasn't crashed.
324
325 // TODO: The definition and use of this "dump requested" constant
326 // in Breakpad are actually Linux-specific, and for similar use
327 // cases on Mac/Windows it defines different constants, referring
328 // to them as "simulated" exceptions; consider moving this check
329 // down to the OS-specific paths and checking each OS for its own
330 // constant.
331 return;
332 }
333
334 lldb::StopInfoSP stop_info;
335 lldb::ThreadSP stop_thread;
336
337 Process::m_thread_list.SetSelectedThreadByID(m_active_exception->ThreadId);
338 stop_thread = Process::m_thread_list.GetSelectedThread();
339 ArchSpec arch = GetArchitecture();
340
341 if (arch.GetTriple().getOS() == llvm::Triple::Linux) {
342 uint32_t signo = m_active_exception->ExceptionRecord.ExceptionCode;
343
344 if (signo == 0) {
345 // No stop.
346 return;
347 }
348
349 stop_info = StopInfo::CreateStopReasonWithSignal(
350 *stop_thread, signo);
351 } else if (arch.GetTriple().getVendor() == llvm::Triple::Apple) {
352 stop_info = StopInfoMachException::CreateStopReasonWithMachException(
353 *stop_thread, m_active_exception->ExceptionRecord.ExceptionCode, 2,
354 m_active_exception->ExceptionRecord.ExceptionFlags,
355 m_active_exception->ExceptionRecord.ExceptionAddress, 0);
356 } else {
357 std::string desc;
358 llvm::raw_string_ostream desc_stream(desc);
359 desc_stream << "Exception "
360 << llvm::format_hex(
361 m_active_exception->ExceptionRecord.ExceptionCode, 8)
362 << " encountered at address "
363 << llvm::format_hex(
364 m_active_exception->ExceptionRecord.ExceptionAddress, 8);
365 stop_info = StopInfo::CreateStopReasonWithException(
366 *stop_thread, desc_stream.str().c_str());
367 }
368
369 stop_thread->SetStopInfo(stop_info);
370 }
371
IsAlive()372 bool ProcessMinidump::IsAlive() { return true; }
373
WarnBeforeDetach() const374 bool ProcessMinidump::WarnBeforeDetach() const { return false; }
375
ReadMemory(lldb::addr_t addr,void * buf,size_t size,Status & error)376 size_t ProcessMinidump::ReadMemory(lldb::addr_t addr, void *buf, size_t size,
377 Status &error) {
378 // Don't allow the caching that lldb_private::Process::ReadMemory does since
379 // we have it all cached in our dump file anyway.
380 return DoReadMemory(addr, buf, size, error);
381 }
382
DoReadMemory(lldb::addr_t addr,void * buf,size_t size,Status & error)383 size_t ProcessMinidump::DoReadMemory(lldb::addr_t addr, void *buf, size_t size,
384 Status &error) {
385
386 llvm::ArrayRef<uint8_t> mem = m_minidump_parser->GetMemory(addr, size);
387 if (mem.empty()) {
388 error.SetErrorString("could not parse memory info");
389 return 0;
390 }
391
392 std::memcpy(buf, mem.data(), mem.size());
393 return mem.size();
394 }
395
GetArchitecture()396 ArchSpec ProcessMinidump::GetArchitecture() {
397 if (!m_is_wow64) {
398 return m_minidump_parser->GetArchitecture();
399 }
400
401 llvm::Triple triple;
402 triple.setVendor(llvm::Triple::VendorType::UnknownVendor);
403 triple.setArch(llvm::Triple::ArchType::x86);
404 triple.setOS(llvm::Triple::OSType::Win32);
405 return ArchSpec(triple);
406 }
407
BuildMemoryRegions()408 void ProcessMinidump::BuildMemoryRegions() {
409 if (m_memory_regions)
410 return;
411 m_memory_regions.emplace();
412 bool is_complete;
413 std::tie(*m_memory_regions, is_complete) =
414 m_minidump_parser->BuildMemoryRegions();
415
416 if (is_complete)
417 return;
418
419 MemoryRegionInfos to_add;
420 ModuleList &modules = GetTarget().GetImages();
421 SectionLoadList &load_list = GetTarget().GetSectionLoadList();
422 modules.ForEach([&](const ModuleSP &module_sp) {
423 SectionList *sections = module_sp->GetSectionList();
424 for (size_t i = 0; i < sections->GetSize(); ++i) {
425 SectionSP section_sp = sections->GetSectionAtIndex(i);
426 addr_t load_addr = load_list.GetSectionLoadAddress(section_sp);
427 if (load_addr == LLDB_INVALID_ADDRESS)
428 continue;
429 MemoryRegionInfo::RangeType section_range(load_addr,
430 section_sp->GetByteSize());
431 MemoryRegionInfo region =
432 MinidumpParser::GetMemoryRegionInfo(*m_memory_regions, load_addr);
433 if (region.GetMapped() != MemoryRegionInfo::eYes &&
434 region.GetRange().GetRangeBase() <= section_range.GetRangeBase() &&
435 section_range.GetRangeEnd() <= region.GetRange().GetRangeEnd()) {
436 to_add.emplace_back();
437 to_add.back().GetRange() = section_range;
438 to_add.back().SetLLDBPermissions(section_sp->GetPermissions());
439 to_add.back().SetMapped(MemoryRegionInfo::eYes);
440 to_add.back().SetName(module_sp->GetFileSpec().GetPath().c_str());
441 }
442 }
443 return true;
444 });
445 m_memory_regions->insert(m_memory_regions->end(), to_add.begin(),
446 to_add.end());
447 llvm::sort(*m_memory_regions);
448 }
449
GetMemoryRegionInfo(lldb::addr_t load_addr,MemoryRegionInfo & region)450 Status ProcessMinidump::GetMemoryRegionInfo(lldb::addr_t load_addr,
451 MemoryRegionInfo ®ion) {
452 BuildMemoryRegions();
453 region = MinidumpParser::GetMemoryRegionInfo(*m_memory_regions, load_addr);
454 return Status();
455 }
456
GetMemoryRegions(MemoryRegionInfos & region_list)457 Status ProcessMinidump::GetMemoryRegions(MemoryRegionInfos ®ion_list) {
458 BuildMemoryRegions();
459 region_list = *m_memory_regions;
460 return Status();
461 }
462
Clear()463 void ProcessMinidump::Clear() { Process::m_thread_list.Clear(); }
464
UpdateThreadList(ThreadList & old_thread_list,ThreadList & new_thread_list)465 bool ProcessMinidump::UpdateThreadList(ThreadList &old_thread_list,
466 ThreadList &new_thread_list) {
467 for (const minidump::Thread &thread : m_thread_list) {
468 LocationDescriptor context_location = thread.Context;
469
470 // If the minidump contains an exception context, use it
471 if (m_active_exception != nullptr &&
472 m_active_exception->ThreadId == thread.ThreadId) {
473 context_location = m_active_exception->ThreadContext;
474 }
475
476 llvm::ArrayRef<uint8_t> context;
477 if (!m_is_wow64)
478 context = m_minidump_parser->GetThreadContext(context_location);
479 else
480 context = m_minidump_parser->GetThreadContextWow64(thread);
481
482 lldb::ThreadSP thread_sp(new ThreadMinidump(*this, thread, context));
483 new_thread_list.AddThread(thread_sp);
484 }
485 return new_thread_list.GetSize(false) > 0;
486 }
487
GetOrCreateModule(UUID minidump_uuid,llvm::StringRef name,ModuleSpec module_spec)488 ModuleSP ProcessMinidump::GetOrCreateModule(UUID minidump_uuid,
489 llvm::StringRef name,
490 ModuleSpec module_spec) {
491 Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
492 Status error;
493
494 ModuleSP module_sp =
495 GetTarget().GetOrCreateModule(module_spec, true /* notify */, &error);
496 if (!module_sp)
497 return module_sp;
498 // We consider the module to be a match if the minidump UUID is a
499 // prefix of the actual UUID, or if either of the UUIDs are empty.
500 const auto dmp_bytes = minidump_uuid.GetBytes();
501 const auto mod_bytes = module_sp->GetUUID().GetBytes();
502 const bool match = dmp_bytes.empty() || mod_bytes.empty() ||
503 mod_bytes.take_front(dmp_bytes.size()) == dmp_bytes;
504 if (match) {
505 LLDB_LOG(log, "Partial uuid match for {0}.", name);
506 return module_sp;
507 }
508
509 // Breakpad generates minindump files, and if there is no GNU build
510 // ID in the binary, it will calculate a UUID by hashing first 4096
511 // bytes of the .text section and using that as the UUID for a module
512 // in the minidump. Facebook uses a modified breakpad client that
513 // uses a slightly modified this hash to avoid collisions. Check for
514 // UUIDs from the minindump that match these cases and accept the
515 // module we find if they do match.
516 std::vector<uint8_t> breakpad_uuid;
517 std::vector<uint8_t> facebook_uuid;
518 HashElfTextSection(module_sp, breakpad_uuid, facebook_uuid);
519 if (dmp_bytes == llvm::ArrayRef<uint8_t>(breakpad_uuid)) {
520 LLDB_LOG(log, "Breakpad .text hash match for {0}.", name);
521 return module_sp;
522 }
523 if (dmp_bytes == llvm::ArrayRef<uint8_t>(facebook_uuid)) {
524 LLDB_LOG(log, "Facebook .text hash match for {0}.", name);
525 return module_sp;
526 }
527 // The UUID wasn't a partial match and didn't match the .text hash
528 // so remove the module from the target, we will need to create a
529 // placeholder object file.
530 GetTarget().GetImages().Remove(module_sp);
531 module_sp.reset();
532 return module_sp;
533 }
534
ReadModuleList()535 void ProcessMinidump::ReadModuleList() {
536 std::vector<const minidump::Module *> filtered_modules =
537 m_minidump_parser->GetFilteredModuleList();
538
539 Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
540
541 for (auto module : filtered_modules) {
542 std::string name = cantFail(m_minidump_parser->GetMinidumpFile().getString(
543 module->ModuleNameRVA));
544 const uint64_t load_addr = module->BaseOfImage;
545 const uint64_t load_size = module->SizeOfImage;
546 LLDB_LOG(log, "found module: name: {0} {1:x10}-{2:x10} size: {3}", name,
547 load_addr, load_addr + load_size, load_size);
548
549 // check if the process is wow64 - a 32 bit windows process running on a
550 // 64 bit windows
551 if (llvm::StringRef(name).endswith_lower("wow64.dll")) {
552 m_is_wow64 = true;
553 }
554
555 const auto uuid = m_minidump_parser->GetModuleUUID(module);
556 auto file_spec = FileSpec(name, GetArchitecture().GetTriple());
557 ModuleSpec module_spec(file_spec, uuid);
558 module_spec.GetArchitecture() = GetArchitecture();
559 Status error;
560 // Try and find a module with a full UUID that matches. This function will
561 // add the module to the target if it finds one.
562 lldb::ModuleSP module_sp = GetTarget().GetOrCreateModule(module_spec,
563 true /* notify */, &error);
564 if (module_sp) {
565 LLDB_LOG(log, "Full uuid match for {0}.", name);
566 } else {
567 // We couldn't find a module with an exactly-matching UUID. Sometimes
568 // a minidump UUID is only a partial match or is a hash. So try again
569 // without specifying the UUID, then again without specifying the
570 // directory if that fails. This will allow us to find modules with
571 // partial matches or hash UUIDs in user-provided sysroots or search
572 // directories (target.exec-search-paths).
573 ModuleSpec partial_module_spec = module_spec;
574 partial_module_spec.GetUUID().Clear();
575 module_sp = GetOrCreateModule(uuid, name, partial_module_spec);
576 if (!module_sp) {
577 partial_module_spec.GetFileSpec().GetDirectory().Clear();
578 module_sp = GetOrCreateModule(uuid, name, partial_module_spec);
579 }
580 }
581 if (module_sp) {
582 // Watch out for place holder modules that have different paths, but the
583 // same UUID. If the base address is different, create a new module. If
584 // we don't then we will end up setting the load address of a different
585 // PlaceholderObjectFile and an assertion will fire.
586 auto *objfile = module_sp->GetObjectFile();
587 if (objfile && objfile->GetPluginName() ==
588 PlaceholderObjectFile::GetStaticPluginName()) {
589 if (((PlaceholderObjectFile *)objfile)->GetBaseImageAddress() !=
590 load_addr)
591 module_sp.reset();
592 }
593 }
594 if (!module_sp) {
595 // We failed to locate a matching local object file. Fortunately, the
596 // minidump format encodes enough information about each module's memory
597 // range to allow us to create placeholder modules.
598 //
599 // This enables most LLDB functionality involving address-to-module
600 // translations (ex. identifing the module for a stack frame PC) and
601 // modules/sections commands (ex. target modules list, ...)
602 LLDB_LOG(log,
603 "Unable to locate the matching object file, creating a "
604 "placeholder module for: {0}",
605 name);
606
607 module_sp = Module::CreateModuleFromObjectFile<PlaceholderObjectFile>(
608 module_spec, load_addr, load_size);
609 GetTarget().GetImages().Append(module_sp, true /* notify */);
610 }
611
612 bool load_addr_changed = false;
613 module_sp->SetLoadAddress(GetTarget(), load_addr, false,
614 load_addr_changed);
615 }
616 }
617
GetProcessInfo(ProcessInstanceInfo & info)618 bool ProcessMinidump::GetProcessInfo(ProcessInstanceInfo &info) {
619 info.Clear();
620 info.SetProcessID(GetID());
621 info.SetArchitecture(GetArchitecture());
622 lldb::ModuleSP module_sp = GetTarget().GetExecutableModule();
623 if (module_sp) {
624 const bool add_exe_file_as_first_arg = false;
625 info.SetExecutableFile(GetTarget().GetExecutableModule()->GetFileSpec(),
626 add_exe_file_as_first_arg);
627 }
628 return true;
629 }
630
631 // For minidumps there's no runtime generated code so we don't need JITLoader(s)
632 // Avoiding them will also speed up minidump loading since JITLoaders normally
633 // try to set up symbolic breakpoints, which in turn may force loading more
634 // debug information than needed.
GetJITLoaders()635 JITLoaderList &ProcessMinidump::GetJITLoaders() {
636 if (!m_jit_loaders_up) {
637 m_jit_loaders_up = std::make_unique<JITLoaderList>();
638 }
639 return *m_jit_loaders_up;
640 }
641
642 #define INIT_BOOL(VAR, LONG, SHORT, DESC) \
643 VAR(LLDB_OPT_SET_1, false, LONG, SHORT, DESC, false, true)
644 #define APPEND_OPT(VAR) \
645 m_option_group.Append(&VAR, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1)
646
647 class CommandObjectProcessMinidumpDump : public CommandObjectParsed {
648 private:
649 OptionGroupOptions m_option_group;
650 OptionGroupBoolean m_dump_all;
651 OptionGroupBoolean m_dump_directory;
652 OptionGroupBoolean m_dump_linux_cpuinfo;
653 OptionGroupBoolean m_dump_linux_proc_status;
654 OptionGroupBoolean m_dump_linux_lsb_release;
655 OptionGroupBoolean m_dump_linux_cmdline;
656 OptionGroupBoolean m_dump_linux_environ;
657 OptionGroupBoolean m_dump_linux_auxv;
658 OptionGroupBoolean m_dump_linux_maps;
659 OptionGroupBoolean m_dump_linux_proc_stat;
660 OptionGroupBoolean m_dump_linux_proc_uptime;
661 OptionGroupBoolean m_dump_linux_proc_fd;
662 OptionGroupBoolean m_dump_linux_all;
663 OptionGroupBoolean m_fb_app_data;
664 OptionGroupBoolean m_fb_build_id;
665 OptionGroupBoolean m_fb_version;
666 OptionGroupBoolean m_fb_java_stack;
667 OptionGroupBoolean m_fb_dalvik;
668 OptionGroupBoolean m_fb_unwind;
669 OptionGroupBoolean m_fb_error_log;
670 OptionGroupBoolean m_fb_app_state;
671 OptionGroupBoolean m_fb_abort;
672 OptionGroupBoolean m_fb_thread;
673 OptionGroupBoolean m_fb_logcat;
674 OptionGroupBoolean m_fb_all;
675
SetDefaultOptionsIfNoneAreSet()676 void SetDefaultOptionsIfNoneAreSet() {
677 if (m_dump_all.GetOptionValue().GetCurrentValue() ||
678 m_dump_linux_all.GetOptionValue().GetCurrentValue() ||
679 m_fb_all.GetOptionValue().GetCurrentValue() ||
680 m_dump_directory.GetOptionValue().GetCurrentValue() ||
681 m_dump_linux_cpuinfo.GetOptionValue().GetCurrentValue() ||
682 m_dump_linux_proc_status.GetOptionValue().GetCurrentValue() ||
683 m_dump_linux_lsb_release.GetOptionValue().GetCurrentValue() ||
684 m_dump_linux_cmdline.GetOptionValue().GetCurrentValue() ||
685 m_dump_linux_environ.GetOptionValue().GetCurrentValue() ||
686 m_dump_linux_auxv.GetOptionValue().GetCurrentValue() ||
687 m_dump_linux_maps.GetOptionValue().GetCurrentValue() ||
688 m_dump_linux_proc_stat.GetOptionValue().GetCurrentValue() ||
689 m_dump_linux_proc_uptime.GetOptionValue().GetCurrentValue() ||
690 m_dump_linux_proc_fd.GetOptionValue().GetCurrentValue() ||
691 m_fb_app_data.GetOptionValue().GetCurrentValue() ||
692 m_fb_build_id.GetOptionValue().GetCurrentValue() ||
693 m_fb_version.GetOptionValue().GetCurrentValue() ||
694 m_fb_java_stack.GetOptionValue().GetCurrentValue() ||
695 m_fb_dalvik.GetOptionValue().GetCurrentValue() ||
696 m_fb_unwind.GetOptionValue().GetCurrentValue() ||
697 m_fb_error_log.GetOptionValue().GetCurrentValue() ||
698 m_fb_app_state.GetOptionValue().GetCurrentValue() ||
699 m_fb_abort.GetOptionValue().GetCurrentValue() ||
700 m_fb_thread.GetOptionValue().GetCurrentValue() ||
701 m_fb_logcat.GetOptionValue().GetCurrentValue())
702 return;
703 // If no options were set, then dump everything
704 m_dump_all.GetOptionValue().SetCurrentValue(true);
705 }
DumpAll() const706 bool DumpAll() const {
707 return m_dump_all.GetOptionValue().GetCurrentValue();
708 }
DumpDirectory() const709 bool DumpDirectory() const {
710 return DumpAll() ||
711 m_dump_directory.GetOptionValue().GetCurrentValue();
712 }
DumpLinux() const713 bool DumpLinux() const {
714 return DumpAll() || m_dump_linux_all.GetOptionValue().GetCurrentValue();
715 }
DumpLinuxCPUInfo() const716 bool DumpLinuxCPUInfo() const {
717 return DumpLinux() ||
718 m_dump_linux_cpuinfo.GetOptionValue().GetCurrentValue();
719 }
DumpLinuxProcStatus() const720 bool DumpLinuxProcStatus() const {
721 return DumpLinux() ||
722 m_dump_linux_proc_status.GetOptionValue().GetCurrentValue();
723 }
DumpLinuxProcStat() const724 bool DumpLinuxProcStat() const {
725 return DumpLinux() ||
726 m_dump_linux_proc_stat.GetOptionValue().GetCurrentValue();
727 }
DumpLinuxLSBRelease() const728 bool DumpLinuxLSBRelease() const {
729 return DumpLinux() ||
730 m_dump_linux_lsb_release.GetOptionValue().GetCurrentValue();
731 }
DumpLinuxCMDLine() const732 bool DumpLinuxCMDLine() const {
733 return DumpLinux() ||
734 m_dump_linux_cmdline.GetOptionValue().GetCurrentValue();
735 }
DumpLinuxEnviron() const736 bool DumpLinuxEnviron() const {
737 return DumpLinux() ||
738 m_dump_linux_environ.GetOptionValue().GetCurrentValue();
739 }
DumpLinuxAuxv() const740 bool DumpLinuxAuxv() const {
741 return DumpLinux() ||
742 m_dump_linux_auxv.GetOptionValue().GetCurrentValue();
743 }
DumpLinuxMaps() const744 bool DumpLinuxMaps() const {
745 return DumpLinux() ||
746 m_dump_linux_maps.GetOptionValue().GetCurrentValue();
747 }
DumpLinuxProcUptime() const748 bool DumpLinuxProcUptime() const {
749 return DumpLinux() ||
750 m_dump_linux_proc_uptime.GetOptionValue().GetCurrentValue();
751 }
DumpLinuxProcFD() const752 bool DumpLinuxProcFD() const {
753 return DumpLinux() ||
754 m_dump_linux_proc_fd.GetOptionValue().GetCurrentValue();
755 }
DumpFacebook() const756 bool DumpFacebook() const {
757 return DumpAll() || m_fb_all.GetOptionValue().GetCurrentValue();
758 }
DumpFacebookAppData() const759 bool DumpFacebookAppData() const {
760 return DumpFacebook() || m_fb_app_data.GetOptionValue().GetCurrentValue();
761 }
DumpFacebookBuildID() const762 bool DumpFacebookBuildID() const {
763 return DumpFacebook() || m_fb_build_id.GetOptionValue().GetCurrentValue();
764 }
DumpFacebookVersionName() const765 bool DumpFacebookVersionName() const {
766 return DumpFacebook() || m_fb_version.GetOptionValue().GetCurrentValue();
767 }
DumpFacebookJavaStack() const768 bool DumpFacebookJavaStack() const {
769 return DumpFacebook() || m_fb_java_stack.GetOptionValue().GetCurrentValue();
770 }
DumpFacebookDalvikInfo() const771 bool DumpFacebookDalvikInfo() const {
772 return DumpFacebook() || m_fb_dalvik.GetOptionValue().GetCurrentValue();
773 }
DumpFacebookUnwindSymbols() const774 bool DumpFacebookUnwindSymbols() const {
775 return DumpFacebook() || m_fb_unwind.GetOptionValue().GetCurrentValue();
776 }
DumpFacebookErrorLog() const777 bool DumpFacebookErrorLog() const {
778 return DumpFacebook() || m_fb_error_log.GetOptionValue().GetCurrentValue();
779 }
DumpFacebookAppStateLog() const780 bool DumpFacebookAppStateLog() const {
781 return DumpFacebook() || m_fb_app_state.GetOptionValue().GetCurrentValue();
782 }
DumpFacebookAbortReason() const783 bool DumpFacebookAbortReason() const {
784 return DumpFacebook() || m_fb_abort.GetOptionValue().GetCurrentValue();
785 }
DumpFacebookThreadName() const786 bool DumpFacebookThreadName() const {
787 return DumpFacebook() || m_fb_thread.GetOptionValue().GetCurrentValue();
788 }
DumpFacebookLogcat() const789 bool DumpFacebookLogcat() const {
790 return DumpFacebook() || m_fb_logcat.GetOptionValue().GetCurrentValue();
791 }
792 public:
CommandObjectProcessMinidumpDump(CommandInterpreter & interpreter)793 CommandObjectProcessMinidumpDump(CommandInterpreter &interpreter)
794 : CommandObjectParsed(interpreter, "process plugin dump",
795 "Dump information from the minidump file.", nullptr),
796 m_option_group(),
797 INIT_BOOL(m_dump_all, "all", 'a',
798 "Dump the everything in the minidump."),
799 INIT_BOOL(m_dump_directory, "directory", 'd',
800 "Dump the minidump directory map."),
801 INIT_BOOL(m_dump_linux_cpuinfo, "cpuinfo", 'C',
802 "Dump linux /proc/cpuinfo."),
803 INIT_BOOL(m_dump_linux_proc_status, "status", 's',
804 "Dump linux /proc/<pid>/status."),
805 INIT_BOOL(m_dump_linux_lsb_release, "lsb-release", 'r',
806 "Dump linux /etc/lsb-release."),
807 INIT_BOOL(m_dump_linux_cmdline, "cmdline", 'c',
808 "Dump linux /proc/<pid>/cmdline."),
809 INIT_BOOL(m_dump_linux_environ, "environ", 'e',
810 "Dump linux /proc/<pid>/environ."),
811 INIT_BOOL(m_dump_linux_auxv, "auxv", 'x',
812 "Dump linux /proc/<pid>/auxv."),
813 INIT_BOOL(m_dump_linux_maps, "maps", 'm',
814 "Dump linux /proc/<pid>/maps."),
815 INIT_BOOL(m_dump_linux_proc_stat, "stat", 'S',
816 "Dump linux /proc/<pid>/stat."),
817 INIT_BOOL(m_dump_linux_proc_uptime, "uptime", 'u',
818 "Dump linux process uptime."),
819 INIT_BOOL(m_dump_linux_proc_fd, "fd", 'f',
820 "Dump linux /proc/<pid>/fd."),
821 INIT_BOOL(m_dump_linux_all, "linux", 'l',
822 "Dump all linux streams."),
823 INIT_BOOL(m_fb_app_data, "fb-app-data", 1,
824 "Dump Facebook application custom data."),
825 INIT_BOOL(m_fb_build_id, "fb-build-id", 2,
826 "Dump the Facebook build ID."),
827 INIT_BOOL(m_fb_version, "fb-version", 3,
828 "Dump Facebook application version string."),
829 INIT_BOOL(m_fb_java_stack, "fb-java-stack", 4,
830 "Dump Facebook java stack."),
831 INIT_BOOL(m_fb_dalvik, "fb-dalvik-info", 5,
832 "Dump Facebook Dalvik info."),
833 INIT_BOOL(m_fb_unwind, "fb-unwind-symbols", 6,
834 "Dump Facebook unwind symbols."),
835 INIT_BOOL(m_fb_error_log, "fb-error-log", 7,
836 "Dump Facebook error log."),
837 INIT_BOOL(m_fb_app_state, "fb-app-state-log", 8,
838 "Dump Facebook java stack."),
839 INIT_BOOL(m_fb_abort, "fb-abort-reason", 9,
840 "Dump Facebook abort reason."),
841 INIT_BOOL(m_fb_thread, "fb-thread-name", 10,
842 "Dump Facebook thread name."),
843 INIT_BOOL(m_fb_logcat, "fb-logcat", 11,
844 "Dump Facebook logcat."),
845 INIT_BOOL(m_fb_all, "facebook", 12, "Dump all Facebook streams.") {
846 APPEND_OPT(m_dump_all);
847 APPEND_OPT(m_dump_directory);
848 APPEND_OPT(m_dump_linux_cpuinfo);
849 APPEND_OPT(m_dump_linux_proc_status);
850 APPEND_OPT(m_dump_linux_lsb_release);
851 APPEND_OPT(m_dump_linux_cmdline);
852 APPEND_OPT(m_dump_linux_environ);
853 APPEND_OPT(m_dump_linux_auxv);
854 APPEND_OPT(m_dump_linux_maps);
855 APPEND_OPT(m_dump_linux_proc_stat);
856 APPEND_OPT(m_dump_linux_proc_uptime);
857 APPEND_OPT(m_dump_linux_proc_fd);
858 APPEND_OPT(m_dump_linux_all);
859 APPEND_OPT(m_fb_app_data);
860 APPEND_OPT(m_fb_build_id);
861 APPEND_OPT(m_fb_version);
862 APPEND_OPT(m_fb_java_stack);
863 APPEND_OPT(m_fb_dalvik);
864 APPEND_OPT(m_fb_unwind);
865 APPEND_OPT(m_fb_error_log);
866 APPEND_OPT(m_fb_app_state);
867 APPEND_OPT(m_fb_abort);
868 APPEND_OPT(m_fb_thread);
869 APPEND_OPT(m_fb_logcat);
870 APPEND_OPT(m_fb_all);
871 m_option_group.Finalize();
872 }
873
~CommandObjectProcessMinidumpDump()874 ~CommandObjectProcessMinidumpDump() override {}
875
GetOptions()876 Options *GetOptions() override { return &m_option_group; }
877
DoExecute(Args & command,CommandReturnObject & result)878 bool DoExecute(Args &command, CommandReturnObject &result) override {
879 const size_t argc = command.GetArgumentCount();
880 if (argc > 0) {
881 result.AppendErrorWithFormat("'%s' take no arguments, only options",
882 m_cmd_name.c_str());
883 result.SetStatus(eReturnStatusFailed);
884 return false;
885 }
886 SetDefaultOptionsIfNoneAreSet();
887
888 ProcessMinidump *process = static_cast<ProcessMinidump *>(
889 m_interpreter.GetExecutionContext().GetProcessPtr());
890 result.SetStatus(eReturnStatusSuccessFinishResult);
891 Stream &s = result.GetOutputStream();
892 MinidumpParser &minidump = *process->m_minidump_parser;
893 if (DumpDirectory()) {
894 s.Printf("RVA SIZE TYPE StreamType\n");
895 s.Printf("---------- ---------- ---------- --------------------------\n");
896 for (const auto &stream_desc : minidump.GetMinidumpFile().streams())
897 s.Printf(
898 "0x%8.8x 0x%8.8x 0x%8.8x %s\n", (uint32_t)stream_desc.Location.RVA,
899 (uint32_t)stream_desc.Location.DataSize,
900 (unsigned)(StreamType)stream_desc.Type,
901 MinidumpParser::GetStreamTypeAsString(stream_desc.Type).data());
902 s.Printf("\n");
903 }
904 auto DumpTextStream = [&](StreamType stream_type,
905 llvm::StringRef label) -> void {
906 auto bytes = minidump.GetStream(stream_type);
907 if (!bytes.empty()) {
908 if (label.empty())
909 label = MinidumpParser::GetStreamTypeAsString(stream_type);
910 s.Printf("%s:\n%s\n\n", label.data(), bytes.data());
911 }
912 };
913 auto DumpBinaryStream = [&](StreamType stream_type,
914 llvm::StringRef label) -> void {
915 auto bytes = minidump.GetStream(stream_type);
916 if (!bytes.empty()) {
917 if (label.empty())
918 label = MinidumpParser::GetStreamTypeAsString(stream_type);
919 s.Printf("%s:\n", label.data());
920 DataExtractor data(bytes.data(), bytes.size(), eByteOrderLittle,
921 process->GetAddressByteSize());
922 DumpDataExtractor(data, &s, 0, lldb::eFormatBytesWithASCII, 1,
923 bytes.size(), 16, 0, 0, 0);
924 s.Printf("\n\n");
925 }
926 };
927
928 if (DumpLinuxCPUInfo())
929 DumpTextStream(StreamType::LinuxCPUInfo, "/proc/cpuinfo");
930 if (DumpLinuxProcStatus())
931 DumpTextStream(StreamType::LinuxProcStatus, "/proc/PID/status");
932 if (DumpLinuxLSBRelease())
933 DumpTextStream(StreamType::LinuxLSBRelease, "/etc/lsb-release");
934 if (DumpLinuxCMDLine())
935 DumpTextStream(StreamType::LinuxCMDLine, "/proc/PID/cmdline");
936 if (DumpLinuxEnviron())
937 DumpTextStream(StreamType::LinuxEnviron, "/proc/PID/environ");
938 if (DumpLinuxAuxv())
939 DumpBinaryStream(StreamType::LinuxAuxv, "/proc/PID/auxv");
940 if (DumpLinuxMaps())
941 DumpTextStream(StreamType::LinuxMaps, "/proc/PID/maps");
942 if (DumpLinuxProcStat())
943 DumpTextStream(StreamType::LinuxProcStat, "/proc/PID/stat");
944 if (DumpLinuxProcUptime())
945 DumpTextStream(StreamType::LinuxProcUptime, "uptime");
946 if (DumpLinuxProcFD())
947 DumpTextStream(StreamType::LinuxProcFD, "/proc/PID/fd");
948 if (DumpFacebookAppData())
949 DumpTextStream(StreamType::FacebookAppCustomData,
950 "Facebook App Data");
951 if (DumpFacebookBuildID()) {
952 auto bytes = minidump.GetStream(StreamType::FacebookBuildID);
953 if (bytes.size() >= 4) {
954 DataExtractor data(bytes.data(), bytes.size(), eByteOrderLittle,
955 process->GetAddressByteSize());
956 lldb::offset_t offset = 0;
957 uint32_t build_id = data.GetU32(&offset);
958 s.Printf("Facebook Build ID:\n");
959 s.Printf("%u\n", build_id);
960 s.Printf("\n");
961 }
962 }
963 if (DumpFacebookVersionName())
964 DumpTextStream(StreamType::FacebookAppVersionName,
965 "Facebook Version String");
966 if (DumpFacebookJavaStack())
967 DumpTextStream(StreamType::FacebookJavaStack,
968 "Facebook Java Stack");
969 if (DumpFacebookDalvikInfo())
970 DumpTextStream(StreamType::FacebookDalvikInfo,
971 "Facebook Dalvik Info");
972 if (DumpFacebookUnwindSymbols())
973 DumpBinaryStream(StreamType::FacebookUnwindSymbols,
974 "Facebook Unwind Symbols Bytes");
975 if (DumpFacebookErrorLog())
976 DumpTextStream(StreamType::FacebookDumpErrorLog,
977 "Facebook Error Log");
978 if (DumpFacebookAppStateLog())
979 DumpTextStream(StreamType::FacebookAppStateLog,
980 "Faceook Application State Log");
981 if (DumpFacebookAbortReason())
982 DumpTextStream(StreamType::FacebookAbortReason,
983 "Facebook Abort Reason");
984 if (DumpFacebookThreadName())
985 DumpTextStream(StreamType::FacebookThreadName,
986 "Facebook Thread Name");
987 if (DumpFacebookLogcat())
988 DumpTextStream(StreamType::FacebookLogcat,
989 "Facebook Logcat");
990 return true;
991 }
992 };
993
994 class CommandObjectMultiwordProcessMinidump : public CommandObjectMultiword {
995 public:
CommandObjectMultiwordProcessMinidump(CommandInterpreter & interpreter)996 CommandObjectMultiwordProcessMinidump(CommandInterpreter &interpreter)
997 : CommandObjectMultiword(interpreter, "process plugin",
998 "Commands for operating on a ProcessMinidump process.",
999 "process plugin <subcommand> [<subcommand-options>]") {
1000 LoadSubCommand("dump",
1001 CommandObjectSP(new CommandObjectProcessMinidumpDump(interpreter)));
1002 }
1003
~CommandObjectMultiwordProcessMinidump()1004 ~CommandObjectMultiwordProcessMinidump() override {}
1005 };
1006
GetPluginCommandObject()1007 CommandObject *ProcessMinidump::GetPluginCommandObject() {
1008 if (!m_command_sp)
1009 m_command_sp = std::make_shared<CommandObjectMultiwordProcessMinidump>(
1010 GetTarget().GetDebugger().GetCommandInterpreter());
1011 return m_command_sp.get();
1012 }
1013