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)201 lldb::ProcessSP ProcessMinidump::CreateInstance(lldb::TargetSP target_sp,
202 lldb::ListenerSP listener_sp,
203 const FileSpec *crash_file) {
204 if (!crash_file)
205 return nullptr;
206
207 lldb::ProcessSP process_sp;
208 // Read enough data for the Minidump header
209 constexpr size_t header_size = sizeof(Header);
210 auto DataPtr = FileSystem::Instance().CreateDataBuffer(crash_file->GetPath(),
211 header_size, 0);
212 if (!DataPtr)
213 return nullptr;
214
215 lldbassert(DataPtr->GetByteSize() == header_size);
216 if (identify_magic(toStringRef(DataPtr->GetData())) != llvm::file_magic::minidump)
217 return nullptr;
218
219 auto AllData =
220 FileSystem::Instance().CreateDataBuffer(crash_file->GetPath(), -1, 0);
221 if (!AllData)
222 return nullptr;
223
224 return std::make_shared<ProcessMinidump>(target_sp, listener_sp, *crash_file,
225 std::move(AllData));
226 }
227
CanDebug(lldb::TargetSP target_sp,bool plugin_specified_by_name)228 bool ProcessMinidump::CanDebug(lldb::TargetSP target_sp,
229 bool plugin_specified_by_name) {
230 return true;
231 }
232
ProcessMinidump(lldb::TargetSP target_sp,lldb::ListenerSP listener_sp,const FileSpec & core_file,DataBufferSP core_data)233 ProcessMinidump::ProcessMinidump(lldb::TargetSP target_sp,
234 lldb::ListenerSP listener_sp,
235 const FileSpec &core_file,
236 DataBufferSP core_data)
237 : Process(target_sp, listener_sp), m_core_file(core_file),
238 m_core_data(std::move(core_data)), m_is_wow64(false) {}
239
~ProcessMinidump()240 ProcessMinidump::~ProcessMinidump() {
241 Clear();
242 // We need to call finalize on the process before destroying ourselves to
243 // make sure all of the broadcaster cleanup goes as planned. If we destruct
244 // this class, then Process::~Process() might have problems trying to fully
245 // destroy the broadcaster.
246 Finalize();
247 }
248
Initialize()249 void ProcessMinidump::Initialize() {
250 static llvm::once_flag g_once_flag;
251
252 llvm::call_once(g_once_flag, []() {
253 PluginManager::RegisterPlugin(GetPluginNameStatic(),
254 GetPluginDescriptionStatic(),
255 ProcessMinidump::CreateInstance);
256 });
257 }
258
Terminate()259 void ProcessMinidump::Terminate() {
260 PluginManager::UnregisterPlugin(ProcessMinidump::CreateInstance);
261 }
262
DoLoadCore()263 Status ProcessMinidump::DoLoadCore() {
264 auto expected_parser = MinidumpParser::Create(m_core_data);
265 if (!expected_parser)
266 return Status(expected_parser.takeError());
267 m_minidump_parser = std::move(*expected_parser);
268
269 Status error;
270
271 // Do we support the minidump's architecture?
272 ArchSpec arch = GetArchitecture();
273 switch (arch.GetMachine()) {
274 case llvm::Triple::x86:
275 case llvm::Triple::x86_64:
276 case llvm::Triple::arm:
277 case llvm::Triple::aarch64:
278 // Any supported architectures must be listed here and also supported in
279 // ThreadMinidump::CreateRegisterContextForFrame().
280 break;
281 default:
282 error.SetErrorStringWithFormat("unsupported minidump architecture: %s",
283 arch.GetArchitectureName());
284 return error;
285 }
286 GetTarget().SetArchitecture(arch, true /*set_platform*/);
287
288 m_thread_list = m_minidump_parser->GetThreads();
289 m_active_exception = m_minidump_parser->GetExceptionStream();
290
291 SetUnixSignals(UnixSignals::Create(GetArchitecture()));
292
293 ReadModuleList();
294
295 llvm::Optional<lldb::pid_t> pid = m_minidump_parser->GetPid();
296 if (!pid) {
297 GetTarget().GetDebugger().GetAsyncErrorStream()->PutCString(
298 "Unable to retrieve process ID from minidump file, setting process ID "
299 "to 1.\n");
300 pid = 1;
301 }
302 SetID(pid.getValue());
303
304 return error;
305 }
306
GetPluginName()307 ConstString ProcessMinidump::GetPluginName() { return GetPluginNameStatic(); }
308
GetPluginVersion()309 uint32_t ProcessMinidump::GetPluginVersion() { return 1; }
310
DoDestroy()311 Status ProcessMinidump::DoDestroy() { return Status(); }
312
RefreshStateAfterStop()313 void ProcessMinidump::RefreshStateAfterStop() {
314
315 if (!m_active_exception)
316 return;
317
318 constexpr uint32_t BreakpadDumpRequested = 0xFFFFFFFF;
319 if (m_active_exception->ExceptionRecord.ExceptionCode ==
320 BreakpadDumpRequested) {
321 // This "ExceptionCode" value is a sentinel that is sometimes used
322 // when generating a dump for a process that hasn't crashed.
323
324 // TODO: The definition and use of this "dump requested" constant
325 // in Breakpad are actually Linux-specific, and for similar use
326 // cases on Mac/Windows it defines different constants, referring
327 // to them as "simulated" exceptions; consider moving this check
328 // down to the OS-specific paths and checking each OS for its own
329 // constant.
330 return;
331 }
332
333 lldb::StopInfoSP stop_info;
334 lldb::ThreadSP stop_thread;
335
336 Process::m_thread_list.SetSelectedThreadByID(m_active_exception->ThreadId);
337 stop_thread = Process::m_thread_list.GetSelectedThread();
338 ArchSpec arch = GetArchitecture();
339
340 if (arch.GetTriple().getOS() == llvm::Triple::Linux) {
341 uint32_t signo = m_active_exception->ExceptionRecord.ExceptionCode;
342
343 if (signo == 0) {
344 // No stop.
345 return;
346 }
347
348 stop_info = StopInfo::CreateStopReasonWithSignal(
349 *stop_thread, signo);
350 } else if (arch.GetTriple().getVendor() == llvm::Triple::Apple) {
351 stop_info = StopInfoMachException::CreateStopReasonWithMachException(
352 *stop_thread, m_active_exception->ExceptionRecord.ExceptionCode, 2,
353 m_active_exception->ExceptionRecord.ExceptionFlags,
354 m_active_exception->ExceptionRecord.ExceptionAddress, 0);
355 } else {
356 std::string desc;
357 llvm::raw_string_ostream desc_stream(desc);
358 desc_stream << "Exception "
359 << llvm::format_hex(
360 m_active_exception->ExceptionRecord.ExceptionCode, 8)
361 << " encountered at address "
362 << llvm::format_hex(
363 m_active_exception->ExceptionRecord.ExceptionAddress, 8);
364 stop_info = StopInfo::CreateStopReasonWithException(
365 *stop_thread, desc_stream.str().c_str());
366 }
367
368 stop_thread->SetStopInfo(stop_info);
369 }
370
IsAlive()371 bool ProcessMinidump::IsAlive() { return true; }
372
WarnBeforeDetach() const373 bool ProcessMinidump::WarnBeforeDetach() const { return false; }
374
ReadMemory(lldb::addr_t addr,void * buf,size_t size,Status & error)375 size_t ProcessMinidump::ReadMemory(lldb::addr_t addr, void *buf, size_t size,
376 Status &error) {
377 // Don't allow the caching that lldb_private::Process::ReadMemory does since
378 // we have it all cached in our dump file anyway.
379 return DoReadMemory(addr, buf, size, error);
380 }
381
DoReadMemory(lldb::addr_t addr,void * buf,size_t size,Status & error)382 size_t ProcessMinidump::DoReadMemory(lldb::addr_t addr, void *buf, size_t size,
383 Status &error) {
384
385 llvm::ArrayRef<uint8_t> mem = m_minidump_parser->GetMemory(addr, size);
386 if (mem.empty()) {
387 error.SetErrorString("could not parse memory info");
388 return 0;
389 }
390
391 std::memcpy(buf, mem.data(), mem.size());
392 return mem.size();
393 }
394
GetArchitecture()395 ArchSpec ProcessMinidump::GetArchitecture() {
396 if (!m_is_wow64) {
397 return m_minidump_parser->GetArchitecture();
398 }
399
400 llvm::Triple triple;
401 triple.setVendor(llvm::Triple::VendorType::UnknownVendor);
402 triple.setArch(llvm::Triple::ArchType::x86);
403 triple.setOS(llvm::Triple::OSType::Win32);
404 return ArchSpec(triple);
405 }
406
BuildMemoryRegions()407 void ProcessMinidump::BuildMemoryRegions() {
408 if (m_memory_regions)
409 return;
410 m_memory_regions.emplace();
411 bool is_complete;
412 std::tie(*m_memory_regions, is_complete) =
413 m_minidump_parser->BuildMemoryRegions();
414
415 if (is_complete)
416 return;
417
418 MemoryRegionInfos to_add;
419 ModuleList &modules = GetTarget().GetImages();
420 SectionLoadList &load_list = GetTarget().GetSectionLoadList();
421 modules.ForEach([&](const ModuleSP &module_sp) {
422 SectionList *sections = module_sp->GetSectionList();
423 for (size_t i = 0; i < sections->GetSize(); ++i) {
424 SectionSP section_sp = sections->GetSectionAtIndex(i);
425 addr_t load_addr = load_list.GetSectionLoadAddress(section_sp);
426 if (load_addr == LLDB_INVALID_ADDRESS)
427 continue;
428 MemoryRegionInfo::RangeType section_range(load_addr,
429 section_sp->GetByteSize());
430 MemoryRegionInfo region =
431 MinidumpParser::GetMemoryRegionInfo(*m_memory_regions, load_addr);
432 if (region.GetMapped() != MemoryRegionInfo::eYes &&
433 region.GetRange().GetRangeBase() <= section_range.GetRangeBase() &&
434 section_range.GetRangeEnd() <= region.GetRange().GetRangeEnd()) {
435 to_add.emplace_back();
436 to_add.back().GetRange() = section_range;
437 to_add.back().SetLLDBPermissions(section_sp->GetPermissions());
438 to_add.back().SetMapped(MemoryRegionInfo::eYes);
439 to_add.back().SetName(module_sp->GetFileSpec().GetPath().c_str());
440 }
441 }
442 return true;
443 });
444 m_memory_regions->insert(m_memory_regions->end(), to_add.begin(),
445 to_add.end());
446 llvm::sort(*m_memory_regions);
447 }
448
GetMemoryRegionInfo(lldb::addr_t load_addr,MemoryRegionInfo & region)449 Status ProcessMinidump::GetMemoryRegionInfo(lldb::addr_t load_addr,
450 MemoryRegionInfo ®ion) {
451 BuildMemoryRegions();
452 region = MinidumpParser::GetMemoryRegionInfo(*m_memory_regions, load_addr);
453 return Status();
454 }
455
GetMemoryRegions(MemoryRegionInfos & region_list)456 Status ProcessMinidump::GetMemoryRegions(MemoryRegionInfos ®ion_list) {
457 BuildMemoryRegions();
458 region_list = *m_memory_regions;
459 return Status();
460 }
461
Clear()462 void ProcessMinidump::Clear() { Process::m_thread_list.Clear(); }
463
UpdateThreadList(ThreadList & old_thread_list,ThreadList & new_thread_list)464 bool ProcessMinidump::UpdateThreadList(ThreadList &old_thread_list,
465 ThreadList &new_thread_list) {
466 for (const minidump::Thread &thread : m_thread_list) {
467 LocationDescriptor context_location = thread.Context;
468
469 // If the minidump contains an exception context, use it
470 if (m_active_exception != nullptr &&
471 m_active_exception->ThreadId == thread.ThreadId) {
472 context_location = m_active_exception->ThreadContext;
473 }
474
475 llvm::ArrayRef<uint8_t> context;
476 if (!m_is_wow64)
477 context = m_minidump_parser->GetThreadContext(context_location);
478 else
479 context = m_minidump_parser->GetThreadContextWow64(thread);
480
481 lldb::ThreadSP thread_sp(new ThreadMinidump(*this, thread, context));
482 new_thread_list.AddThread(thread_sp);
483 }
484 return new_thread_list.GetSize(false) > 0;
485 }
486
GetOrCreateModule(UUID minidump_uuid,llvm::StringRef name,ModuleSpec module_spec)487 ModuleSP ProcessMinidump::GetOrCreateModule(UUID minidump_uuid,
488 llvm::StringRef name,
489 ModuleSpec module_spec) {
490 Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
491 Status error;
492
493 ModuleSP module_sp =
494 GetTarget().GetOrCreateModule(module_spec, true /* notify */, &error);
495 if (!module_sp)
496 return module_sp;
497 // We consider the module to be a match if the minidump UUID is a
498 // prefix of the actual UUID, or if either of the UUIDs are empty.
499 const auto dmp_bytes = minidump_uuid.GetBytes();
500 const auto mod_bytes = module_sp->GetUUID().GetBytes();
501 const bool match = dmp_bytes.empty() || mod_bytes.empty() ||
502 mod_bytes.take_front(dmp_bytes.size()) == dmp_bytes;
503 if (match) {
504 LLDB_LOG(log, "Partial uuid match for {0}.", name);
505 return module_sp;
506 }
507
508 // Breakpad generates minindump files, and if there is no GNU build
509 // ID in the binary, it will calculate a UUID by hashing first 4096
510 // bytes of the .text section and using that as the UUID for a module
511 // in the minidump. Facebook uses a modified breakpad client that
512 // uses a slightly modified this hash to avoid collisions. Check for
513 // UUIDs from the minindump that match these cases and accept the
514 // module we find if they do match.
515 std::vector<uint8_t> breakpad_uuid;
516 std::vector<uint8_t> facebook_uuid;
517 HashElfTextSection(module_sp, breakpad_uuid, facebook_uuid);
518 if (dmp_bytes == llvm::ArrayRef<uint8_t>(breakpad_uuid)) {
519 LLDB_LOG(log, "Breakpad .text hash match for {0}.", name);
520 return module_sp;
521 }
522 if (dmp_bytes == llvm::ArrayRef<uint8_t>(facebook_uuid)) {
523 LLDB_LOG(log, "Facebook .text hash match for {0}.", name);
524 return module_sp;
525 }
526 // The UUID wasn't a partial match and didn't match the .text hash
527 // so remove the module from the target, we will need to create a
528 // placeholder object file.
529 GetTarget().GetImages().Remove(module_sp);
530 module_sp.reset();
531 return module_sp;
532 }
533
ReadModuleList()534 void ProcessMinidump::ReadModuleList() {
535 std::vector<const minidump::Module *> filtered_modules =
536 m_minidump_parser->GetFilteredModuleList();
537
538 Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
539
540 for (auto module : filtered_modules) {
541 std::string name = cantFail(m_minidump_parser->GetMinidumpFile().getString(
542 module->ModuleNameRVA));
543 const uint64_t load_addr = module->BaseOfImage;
544 const uint64_t load_size = module->SizeOfImage;
545 LLDB_LOG(log, "found module: name: {0} {1:x10}-{2:x10} size: {3}", name,
546 load_addr, load_addr + load_size, load_size);
547
548 // check if the process is wow64 - a 32 bit windows process running on a
549 // 64 bit windows
550 if (llvm::StringRef(name).endswith_lower("wow64.dll")) {
551 m_is_wow64 = true;
552 }
553
554 const auto uuid = m_minidump_parser->GetModuleUUID(module);
555 auto file_spec = FileSpec(name, GetArchitecture().GetTriple());
556 ModuleSpec module_spec(file_spec, uuid);
557 module_spec.GetArchitecture() = GetArchitecture();
558 Status error;
559 // Try and find a module with a full UUID that matches. This function will
560 // add the module to the target if it finds one.
561 lldb::ModuleSP module_sp = GetTarget().GetOrCreateModule(module_spec,
562 true /* notify */, &error);
563 if (module_sp) {
564 LLDB_LOG(log, "Full uuid match for {0}.", name);
565 } else {
566 // We couldn't find a module with an exactly-matching UUID. Sometimes
567 // a minidump UUID is only a partial match or is a hash. So try again
568 // without specifying the UUID, then again without specifying the
569 // directory if that fails. This will allow us to find modules with
570 // partial matches or hash UUIDs in user-provided sysroots or search
571 // directories (target.exec-search-paths).
572 ModuleSpec partial_module_spec = module_spec;
573 partial_module_spec.GetUUID().Clear();
574 module_sp = GetOrCreateModule(uuid, name, partial_module_spec);
575 if (!module_sp) {
576 partial_module_spec.GetFileSpec().GetDirectory().Clear();
577 module_sp = GetOrCreateModule(uuid, name, partial_module_spec);
578 }
579 }
580 if (module_sp) {
581 // Watch out for place holder modules that have different paths, but the
582 // same UUID. If the base address is different, create a new module. If
583 // we don't then we will end up setting the load address of a different
584 // PlaceholderObjectFile and an assertion will fire.
585 auto *objfile = module_sp->GetObjectFile();
586 if (objfile && objfile->GetPluginName() ==
587 PlaceholderObjectFile::GetStaticPluginName()) {
588 if (((PlaceholderObjectFile *)objfile)->GetBaseImageAddress() !=
589 load_addr)
590 module_sp.reset();
591 }
592 }
593 if (!module_sp) {
594 // We failed to locate a matching local object file. Fortunately, the
595 // minidump format encodes enough information about each module's memory
596 // range to allow us to create placeholder modules.
597 //
598 // This enables most LLDB functionality involving address-to-module
599 // translations (ex. identifing the module for a stack frame PC) and
600 // modules/sections commands (ex. target modules list, ...)
601 LLDB_LOG(log,
602 "Unable to locate the matching object file, creating a "
603 "placeholder module for: {0}",
604 name);
605
606 module_sp = Module::CreateModuleFromObjectFile<PlaceholderObjectFile>(
607 module_spec, load_addr, load_size);
608 GetTarget().GetImages().Append(module_sp, true /* notify */);
609 }
610
611 bool load_addr_changed = false;
612 module_sp->SetLoadAddress(GetTarget(), load_addr, false,
613 load_addr_changed);
614 }
615 }
616
GetProcessInfo(ProcessInstanceInfo & info)617 bool ProcessMinidump::GetProcessInfo(ProcessInstanceInfo &info) {
618 info.Clear();
619 info.SetProcessID(GetID());
620 info.SetArchitecture(GetArchitecture());
621 lldb::ModuleSP module_sp = GetTarget().GetExecutableModule();
622 if (module_sp) {
623 const bool add_exe_file_as_first_arg = false;
624 info.SetExecutableFile(GetTarget().GetExecutableModule()->GetFileSpec(),
625 add_exe_file_as_first_arg);
626 }
627 return true;
628 }
629
630 // For minidumps there's no runtime generated code so we don't need JITLoader(s)
631 // Avoiding them will also speed up minidump loading since JITLoaders normally
632 // try to set up symbolic breakpoints, which in turn may force loading more
633 // debug information than needed.
GetJITLoaders()634 JITLoaderList &ProcessMinidump::GetJITLoaders() {
635 if (!m_jit_loaders_up) {
636 m_jit_loaders_up = std::make_unique<JITLoaderList>();
637 }
638 return *m_jit_loaders_up;
639 }
640
641 #define INIT_BOOL(VAR, LONG, SHORT, DESC) \
642 VAR(LLDB_OPT_SET_1, false, LONG, SHORT, DESC, false, true)
643 #define APPEND_OPT(VAR) \
644 m_option_group.Append(&VAR, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1)
645
646 class CommandObjectProcessMinidumpDump : public CommandObjectParsed {
647 private:
648 OptionGroupOptions m_option_group;
649 OptionGroupBoolean m_dump_all;
650 OptionGroupBoolean m_dump_directory;
651 OptionGroupBoolean m_dump_linux_cpuinfo;
652 OptionGroupBoolean m_dump_linux_proc_status;
653 OptionGroupBoolean m_dump_linux_lsb_release;
654 OptionGroupBoolean m_dump_linux_cmdline;
655 OptionGroupBoolean m_dump_linux_environ;
656 OptionGroupBoolean m_dump_linux_auxv;
657 OptionGroupBoolean m_dump_linux_maps;
658 OptionGroupBoolean m_dump_linux_proc_stat;
659 OptionGroupBoolean m_dump_linux_proc_uptime;
660 OptionGroupBoolean m_dump_linux_proc_fd;
661 OptionGroupBoolean m_dump_linux_all;
662 OptionGroupBoolean m_fb_app_data;
663 OptionGroupBoolean m_fb_build_id;
664 OptionGroupBoolean m_fb_version;
665 OptionGroupBoolean m_fb_java_stack;
666 OptionGroupBoolean m_fb_dalvik;
667 OptionGroupBoolean m_fb_unwind;
668 OptionGroupBoolean m_fb_error_log;
669 OptionGroupBoolean m_fb_app_state;
670 OptionGroupBoolean m_fb_abort;
671 OptionGroupBoolean m_fb_thread;
672 OptionGroupBoolean m_fb_logcat;
673 OptionGroupBoolean m_fb_all;
674
SetDefaultOptionsIfNoneAreSet()675 void SetDefaultOptionsIfNoneAreSet() {
676 if (m_dump_all.GetOptionValue().GetCurrentValue() ||
677 m_dump_linux_all.GetOptionValue().GetCurrentValue() ||
678 m_fb_all.GetOptionValue().GetCurrentValue() ||
679 m_dump_directory.GetOptionValue().GetCurrentValue() ||
680 m_dump_linux_cpuinfo.GetOptionValue().GetCurrentValue() ||
681 m_dump_linux_proc_status.GetOptionValue().GetCurrentValue() ||
682 m_dump_linux_lsb_release.GetOptionValue().GetCurrentValue() ||
683 m_dump_linux_cmdline.GetOptionValue().GetCurrentValue() ||
684 m_dump_linux_environ.GetOptionValue().GetCurrentValue() ||
685 m_dump_linux_auxv.GetOptionValue().GetCurrentValue() ||
686 m_dump_linux_maps.GetOptionValue().GetCurrentValue() ||
687 m_dump_linux_proc_stat.GetOptionValue().GetCurrentValue() ||
688 m_dump_linux_proc_uptime.GetOptionValue().GetCurrentValue() ||
689 m_dump_linux_proc_fd.GetOptionValue().GetCurrentValue() ||
690 m_fb_app_data.GetOptionValue().GetCurrentValue() ||
691 m_fb_build_id.GetOptionValue().GetCurrentValue() ||
692 m_fb_version.GetOptionValue().GetCurrentValue() ||
693 m_fb_java_stack.GetOptionValue().GetCurrentValue() ||
694 m_fb_dalvik.GetOptionValue().GetCurrentValue() ||
695 m_fb_unwind.GetOptionValue().GetCurrentValue() ||
696 m_fb_error_log.GetOptionValue().GetCurrentValue() ||
697 m_fb_app_state.GetOptionValue().GetCurrentValue() ||
698 m_fb_abort.GetOptionValue().GetCurrentValue() ||
699 m_fb_thread.GetOptionValue().GetCurrentValue() ||
700 m_fb_logcat.GetOptionValue().GetCurrentValue())
701 return;
702 // If no options were set, then dump everything
703 m_dump_all.GetOptionValue().SetCurrentValue(true);
704 }
DumpAll() const705 bool DumpAll() const {
706 return m_dump_all.GetOptionValue().GetCurrentValue();
707 }
DumpDirectory() const708 bool DumpDirectory() const {
709 return DumpAll() ||
710 m_dump_directory.GetOptionValue().GetCurrentValue();
711 }
DumpLinux() const712 bool DumpLinux() const {
713 return DumpAll() || m_dump_linux_all.GetOptionValue().GetCurrentValue();
714 }
DumpLinuxCPUInfo() const715 bool DumpLinuxCPUInfo() const {
716 return DumpLinux() ||
717 m_dump_linux_cpuinfo.GetOptionValue().GetCurrentValue();
718 }
DumpLinuxProcStatus() const719 bool DumpLinuxProcStatus() const {
720 return DumpLinux() ||
721 m_dump_linux_proc_status.GetOptionValue().GetCurrentValue();
722 }
DumpLinuxProcStat() const723 bool DumpLinuxProcStat() const {
724 return DumpLinux() ||
725 m_dump_linux_proc_stat.GetOptionValue().GetCurrentValue();
726 }
DumpLinuxLSBRelease() const727 bool DumpLinuxLSBRelease() const {
728 return DumpLinux() ||
729 m_dump_linux_lsb_release.GetOptionValue().GetCurrentValue();
730 }
DumpLinuxCMDLine() const731 bool DumpLinuxCMDLine() const {
732 return DumpLinux() ||
733 m_dump_linux_cmdline.GetOptionValue().GetCurrentValue();
734 }
DumpLinuxEnviron() const735 bool DumpLinuxEnviron() const {
736 return DumpLinux() ||
737 m_dump_linux_environ.GetOptionValue().GetCurrentValue();
738 }
DumpLinuxAuxv() const739 bool DumpLinuxAuxv() const {
740 return DumpLinux() ||
741 m_dump_linux_auxv.GetOptionValue().GetCurrentValue();
742 }
DumpLinuxMaps() const743 bool DumpLinuxMaps() const {
744 return DumpLinux() ||
745 m_dump_linux_maps.GetOptionValue().GetCurrentValue();
746 }
DumpLinuxProcUptime() const747 bool DumpLinuxProcUptime() const {
748 return DumpLinux() ||
749 m_dump_linux_proc_uptime.GetOptionValue().GetCurrentValue();
750 }
DumpLinuxProcFD() const751 bool DumpLinuxProcFD() const {
752 return DumpLinux() ||
753 m_dump_linux_proc_fd.GetOptionValue().GetCurrentValue();
754 }
DumpFacebook() const755 bool DumpFacebook() const {
756 return DumpAll() || m_fb_all.GetOptionValue().GetCurrentValue();
757 }
DumpFacebookAppData() const758 bool DumpFacebookAppData() const {
759 return DumpFacebook() || m_fb_app_data.GetOptionValue().GetCurrentValue();
760 }
DumpFacebookBuildID() const761 bool DumpFacebookBuildID() const {
762 return DumpFacebook() || m_fb_build_id.GetOptionValue().GetCurrentValue();
763 }
DumpFacebookVersionName() const764 bool DumpFacebookVersionName() const {
765 return DumpFacebook() || m_fb_version.GetOptionValue().GetCurrentValue();
766 }
DumpFacebookJavaStack() const767 bool DumpFacebookJavaStack() const {
768 return DumpFacebook() || m_fb_java_stack.GetOptionValue().GetCurrentValue();
769 }
DumpFacebookDalvikInfo() const770 bool DumpFacebookDalvikInfo() const {
771 return DumpFacebook() || m_fb_dalvik.GetOptionValue().GetCurrentValue();
772 }
DumpFacebookUnwindSymbols() const773 bool DumpFacebookUnwindSymbols() const {
774 return DumpFacebook() || m_fb_unwind.GetOptionValue().GetCurrentValue();
775 }
DumpFacebookErrorLog() const776 bool DumpFacebookErrorLog() const {
777 return DumpFacebook() || m_fb_error_log.GetOptionValue().GetCurrentValue();
778 }
DumpFacebookAppStateLog() const779 bool DumpFacebookAppStateLog() const {
780 return DumpFacebook() || m_fb_app_state.GetOptionValue().GetCurrentValue();
781 }
DumpFacebookAbortReason() const782 bool DumpFacebookAbortReason() const {
783 return DumpFacebook() || m_fb_abort.GetOptionValue().GetCurrentValue();
784 }
DumpFacebookThreadName() const785 bool DumpFacebookThreadName() const {
786 return DumpFacebook() || m_fb_thread.GetOptionValue().GetCurrentValue();
787 }
DumpFacebookLogcat() const788 bool DumpFacebookLogcat() const {
789 return DumpFacebook() || m_fb_logcat.GetOptionValue().GetCurrentValue();
790 }
791 public:
CommandObjectProcessMinidumpDump(CommandInterpreter & interpreter)792 CommandObjectProcessMinidumpDump(CommandInterpreter &interpreter)
793 : CommandObjectParsed(interpreter, "process plugin dump",
794 "Dump information from the minidump file.", nullptr),
795 m_option_group(),
796 INIT_BOOL(m_dump_all, "all", 'a',
797 "Dump the everything in the minidump."),
798 INIT_BOOL(m_dump_directory, "directory", 'd',
799 "Dump the minidump directory map."),
800 INIT_BOOL(m_dump_linux_cpuinfo, "cpuinfo", 'C',
801 "Dump linux /proc/cpuinfo."),
802 INIT_BOOL(m_dump_linux_proc_status, "status", 's',
803 "Dump linux /proc/<pid>/status."),
804 INIT_BOOL(m_dump_linux_lsb_release, "lsb-release", 'r',
805 "Dump linux /etc/lsb-release."),
806 INIT_BOOL(m_dump_linux_cmdline, "cmdline", 'c',
807 "Dump linux /proc/<pid>/cmdline."),
808 INIT_BOOL(m_dump_linux_environ, "environ", 'e',
809 "Dump linux /proc/<pid>/environ."),
810 INIT_BOOL(m_dump_linux_auxv, "auxv", 'x',
811 "Dump linux /proc/<pid>/auxv."),
812 INIT_BOOL(m_dump_linux_maps, "maps", 'm',
813 "Dump linux /proc/<pid>/maps."),
814 INIT_BOOL(m_dump_linux_proc_stat, "stat", 'S',
815 "Dump linux /proc/<pid>/stat."),
816 INIT_BOOL(m_dump_linux_proc_uptime, "uptime", 'u',
817 "Dump linux process uptime."),
818 INIT_BOOL(m_dump_linux_proc_fd, "fd", 'f',
819 "Dump linux /proc/<pid>/fd."),
820 INIT_BOOL(m_dump_linux_all, "linux", 'l',
821 "Dump all linux streams."),
822 INIT_BOOL(m_fb_app_data, "fb-app-data", 1,
823 "Dump Facebook application custom data."),
824 INIT_BOOL(m_fb_build_id, "fb-build-id", 2,
825 "Dump the Facebook build ID."),
826 INIT_BOOL(m_fb_version, "fb-version", 3,
827 "Dump Facebook application version string."),
828 INIT_BOOL(m_fb_java_stack, "fb-java-stack", 4,
829 "Dump Facebook java stack."),
830 INIT_BOOL(m_fb_dalvik, "fb-dalvik-info", 5,
831 "Dump Facebook Dalvik info."),
832 INIT_BOOL(m_fb_unwind, "fb-unwind-symbols", 6,
833 "Dump Facebook unwind symbols."),
834 INIT_BOOL(m_fb_error_log, "fb-error-log", 7,
835 "Dump Facebook error log."),
836 INIT_BOOL(m_fb_app_state, "fb-app-state-log", 8,
837 "Dump Facebook java stack."),
838 INIT_BOOL(m_fb_abort, "fb-abort-reason", 9,
839 "Dump Facebook abort reason."),
840 INIT_BOOL(m_fb_thread, "fb-thread-name", 10,
841 "Dump Facebook thread name."),
842 INIT_BOOL(m_fb_logcat, "fb-logcat", 11,
843 "Dump Facebook logcat."),
844 INIT_BOOL(m_fb_all, "facebook", 12, "Dump all Facebook streams.") {
845 APPEND_OPT(m_dump_all);
846 APPEND_OPT(m_dump_directory);
847 APPEND_OPT(m_dump_linux_cpuinfo);
848 APPEND_OPT(m_dump_linux_proc_status);
849 APPEND_OPT(m_dump_linux_lsb_release);
850 APPEND_OPT(m_dump_linux_cmdline);
851 APPEND_OPT(m_dump_linux_environ);
852 APPEND_OPT(m_dump_linux_auxv);
853 APPEND_OPT(m_dump_linux_maps);
854 APPEND_OPT(m_dump_linux_proc_stat);
855 APPEND_OPT(m_dump_linux_proc_uptime);
856 APPEND_OPT(m_dump_linux_proc_fd);
857 APPEND_OPT(m_dump_linux_all);
858 APPEND_OPT(m_fb_app_data);
859 APPEND_OPT(m_fb_build_id);
860 APPEND_OPT(m_fb_version);
861 APPEND_OPT(m_fb_java_stack);
862 APPEND_OPT(m_fb_dalvik);
863 APPEND_OPT(m_fb_unwind);
864 APPEND_OPT(m_fb_error_log);
865 APPEND_OPT(m_fb_app_state);
866 APPEND_OPT(m_fb_abort);
867 APPEND_OPT(m_fb_thread);
868 APPEND_OPT(m_fb_logcat);
869 APPEND_OPT(m_fb_all);
870 m_option_group.Finalize();
871 }
872
~CommandObjectProcessMinidumpDump()873 ~CommandObjectProcessMinidumpDump() override {}
874
GetOptions()875 Options *GetOptions() override { return &m_option_group; }
876
DoExecute(Args & command,CommandReturnObject & result)877 bool DoExecute(Args &command, CommandReturnObject &result) override {
878 const size_t argc = command.GetArgumentCount();
879 if (argc > 0) {
880 result.AppendErrorWithFormat("'%s' take no arguments, only options",
881 m_cmd_name.c_str());
882 result.SetStatus(eReturnStatusFailed);
883 return false;
884 }
885 SetDefaultOptionsIfNoneAreSet();
886
887 ProcessMinidump *process = static_cast<ProcessMinidump *>(
888 m_interpreter.GetExecutionContext().GetProcessPtr());
889 result.SetStatus(eReturnStatusSuccessFinishResult);
890 Stream &s = result.GetOutputStream();
891 MinidumpParser &minidump = *process->m_minidump_parser;
892 if (DumpDirectory()) {
893 s.Printf("RVA SIZE TYPE StreamType\n");
894 s.Printf("---------- ---------- ---------- --------------------------\n");
895 for (const auto &stream_desc : minidump.GetMinidumpFile().streams())
896 s.Printf(
897 "0x%8.8x 0x%8.8x 0x%8.8x %s\n", (uint32_t)stream_desc.Location.RVA,
898 (uint32_t)stream_desc.Location.DataSize,
899 (unsigned)(StreamType)stream_desc.Type,
900 MinidumpParser::GetStreamTypeAsString(stream_desc.Type).data());
901 s.Printf("\n");
902 }
903 auto DumpTextStream = [&](StreamType stream_type,
904 llvm::StringRef label) -> void {
905 auto bytes = minidump.GetStream(stream_type);
906 if (!bytes.empty()) {
907 if (label.empty())
908 label = MinidumpParser::GetStreamTypeAsString(stream_type);
909 s.Printf("%s:\n%s\n\n", label.data(), bytes.data());
910 }
911 };
912 auto DumpBinaryStream = [&](StreamType stream_type,
913 llvm::StringRef label) -> void {
914 auto bytes = minidump.GetStream(stream_type);
915 if (!bytes.empty()) {
916 if (label.empty())
917 label = MinidumpParser::GetStreamTypeAsString(stream_type);
918 s.Printf("%s:\n", label.data());
919 DataExtractor data(bytes.data(), bytes.size(), eByteOrderLittle,
920 process->GetAddressByteSize());
921 DumpDataExtractor(data, &s, 0, lldb::eFormatBytesWithASCII, 1,
922 bytes.size(), 16, 0, 0, 0);
923 s.Printf("\n\n");
924 }
925 };
926
927 if (DumpLinuxCPUInfo())
928 DumpTextStream(StreamType::LinuxCPUInfo, "/proc/cpuinfo");
929 if (DumpLinuxProcStatus())
930 DumpTextStream(StreamType::LinuxProcStatus, "/proc/PID/status");
931 if (DumpLinuxLSBRelease())
932 DumpTextStream(StreamType::LinuxLSBRelease, "/etc/lsb-release");
933 if (DumpLinuxCMDLine())
934 DumpTextStream(StreamType::LinuxCMDLine, "/proc/PID/cmdline");
935 if (DumpLinuxEnviron())
936 DumpTextStream(StreamType::LinuxEnviron, "/proc/PID/environ");
937 if (DumpLinuxAuxv())
938 DumpBinaryStream(StreamType::LinuxAuxv, "/proc/PID/auxv");
939 if (DumpLinuxMaps())
940 DumpTextStream(StreamType::LinuxMaps, "/proc/PID/maps");
941 if (DumpLinuxProcStat())
942 DumpTextStream(StreamType::LinuxProcStat, "/proc/PID/stat");
943 if (DumpLinuxProcUptime())
944 DumpTextStream(StreamType::LinuxProcUptime, "uptime");
945 if (DumpLinuxProcFD())
946 DumpTextStream(StreamType::LinuxProcFD, "/proc/PID/fd");
947 if (DumpFacebookAppData())
948 DumpTextStream(StreamType::FacebookAppCustomData,
949 "Facebook App Data");
950 if (DumpFacebookBuildID()) {
951 auto bytes = minidump.GetStream(StreamType::FacebookBuildID);
952 if (bytes.size() >= 4) {
953 DataExtractor data(bytes.data(), bytes.size(), eByteOrderLittle,
954 process->GetAddressByteSize());
955 lldb::offset_t offset = 0;
956 uint32_t build_id = data.GetU32(&offset);
957 s.Printf("Facebook Build ID:\n");
958 s.Printf("%u\n", build_id);
959 s.Printf("\n");
960 }
961 }
962 if (DumpFacebookVersionName())
963 DumpTextStream(StreamType::FacebookAppVersionName,
964 "Facebook Version String");
965 if (DumpFacebookJavaStack())
966 DumpTextStream(StreamType::FacebookJavaStack,
967 "Facebook Java Stack");
968 if (DumpFacebookDalvikInfo())
969 DumpTextStream(StreamType::FacebookDalvikInfo,
970 "Facebook Dalvik Info");
971 if (DumpFacebookUnwindSymbols())
972 DumpBinaryStream(StreamType::FacebookUnwindSymbols,
973 "Facebook Unwind Symbols Bytes");
974 if (DumpFacebookErrorLog())
975 DumpTextStream(StreamType::FacebookDumpErrorLog,
976 "Facebook Error Log");
977 if (DumpFacebookAppStateLog())
978 DumpTextStream(StreamType::FacebookAppStateLog,
979 "Faceook Application State Log");
980 if (DumpFacebookAbortReason())
981 DumpTextStream(StreamType::FacebookAbortReason,
982 "Facebook Abort Reason");
983 if (DumpFacebookThreadName())
984 DumpTextStream(StreamType::FacebookThreadName,
985 "Facebook Thread Name");
986 if (DumpFacebookLogcat())
987 DumpTextStream(StreamType::FacebookLogcat,
988 "Facebook Logcat");
989 return true;
990 }
991 };
992
993 class CommandObjectMultiwordProcessMinidump : public CommandObjectMultiword {
994 public:
CommandObjectMultiwordProcessMinidump(CommandInterpreter & interpreter)995 CommandObjectMultiwordProcessMinidump(CommandInterpreter &interpreter)
996 : CommandObjectMultiword(interpreter, "process plugin",
997 "Commands for operating on a ProcessMinidump process.",
998 "process plugin <subcommand> [<subcommand-options>]") {
999 LoadSubCommand("dump",
1000 CommandObjectSP(new CommandObjectProcessMinidumpDump(interpreter)));
1001 }
1002
~CommandObjectMultiwordProcessMinidump()1003 ~CommandObjectMultiwordProcessMinidump() override {}
1004 };
1005
GetPluginCommandObject()1006 CommandObject *ProcessMinidump::GetPluginCommandObject() {
1007 if (!m_command_sp)
1008 m_command_sp = std::make_shared<CommandObjectMultiwordProcessMinidump>(
1009 GetTarget().GetDebugger().GetCommandInterpreter());
1010 return m_command_sp.get();
1011 }
1012