1 //===-- ProcessMinidump.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 "ProcessMinidump.h"
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 
33 #include "llvm/Support/MemoryBuffer.h"
34 #include "llvm/Support/Threading.h"
35 
36 #include "Plugins/Process/Utility/StopInfoMachException.h"
37 
38 // C includes
39 // C++ includes
40 
41 using namespace lldb;
42 using namespace lldb_private;
43 using namespace minidump;
44 
45 //------------------------------------------------------------------
46 /// A placeholder module used for minidumps, where the original
47 /// object files may not be available (so we can't parse the object
48 /// files to extract the set of sections/segments)
49 ///
50 /// This placeholder module has a single synthetic section (.module_image)
51 /// which represents the module memory range covering the whole module.
52 //------------------------------------------------------------------
53 class PlaceholderModule : public Module {
54 public:
55   PlaceholderModule(const ModuleSpec &module_spec) :
56     Module(module_spec.GetFileSpec(), module_spec.GetArchitecture()) {
57     if (module_spec.GetUUID().IsValid())
58       SetUUID(module_spec.GetUUID());
59   }
60 
61   // Creates a synthetic module section covering the whole module image (and
62   // sets the section load address as well)
63   void CreateImageSection(const MinidumpModule *module, Target& target) {
64     const ConstString section_name(".module_image");
65     lldb::SectionSP section_sp(new Section(
66         shared_from_this(),     // Module to which this section belongs.
67         nullptr,                // ObjectFile
68         0,                      // Section ID.
69         section_name,           // Section name.
70         eSectionTypeContainer,  // Section type.
71         module->base_of_image,  // VM address.
72         module->size_of_image,  // VM size in bytes of this section.
73         0,                      // Offset of this section in the file.
74         module->size_of_image,  // Size of the section as found in the file.
75         12,                     // Alignment of the section (log2)
76         0,                      // Flags for this section.
77         1));                    // Number of host bytes per target byte
78     section_sp->SetPermissions(ePermissionsExecutable | ePermissionsReadable);
79     GetSectionList()->AddSection(section_sp);
80     target.GetSectionLoadList().SetSectionLoadAddress(
81         section_sp, module->base_of_image);
82   }
83 
84 ObjectFile *GetObjectFile() override { return nullptr; }
85 
86   SectionList *GetSectionList() override {
87     return Module::GetUnifiedSectionList();
88   }
89 };
90 
91 ConstString ProcessMinidump::GetPluginNameStatic() {
92   static ConstString g_name("minidump");
93   return g_name;
94 }
95 
96 const char *ProcessMinidump::GetPluginDescriptionStatic() {
97   return "Minidump plug-in.";
98 }
99 
100 lldb::ProcessSP ProcessMinidump::CreateInstance(lldb::TargetSP target_sp,
101                                                 lldb::ListenerSP listener_sp,
102                                                 const FileSpec *crash_file) {
103   if (!crash_file)
104     return nullptr;
105 
106   lldb::ProcessSP process_sp;
107   // Read enough data for the Minidump header
108   constexpr size_t header_size = sizeof(MinidumpHeader);
109   auto DataPtr = FileSystem::Instance().CreateDataBuffer(crash_file->GetPath(),
110                                                          header_size, 0);
111   if (!DataPtr)
112     return nullptr;
113 
114   lldbassert(DataPtr->GetByteSize() == header_size);
115 
116   // first, only try to parse the header, beacuse we need to be fast
117   llvm::ArrayRef<uint8_t> HeaderBytes = DataPtr->GetData();
118   const MinidumpHeader *header = MinidumpHeader::Parse(HeaderBytes);
119   if (header == nullptr)
120     return nullptr;
121 
122   auto AllData =
123       FileSystem::Instance().CreateDataBuffer(crash_file->GetPath(), -1, 0);
124   if (!AllData)
125     return nullptr;
126 
127   auto minidump_parser = MinidumpParser::Create(AllData);
128   // check if the parser object is valid
129   if (!minidump_parser)
130     return nullptr;
131 
132   return std::make_shared<ProcessMinidump>(target_sp, listener_sp, *crash_file,
133                                            minidump_parser.getValue());
134 }
135 
136 bool ProcessMinidump::CanDebug(lldb::TargetSP target_sp,
137                                bool plugin_specified_by_name) {
138   return true;
139 }
140 
141 ProcessMinidump::ProcessMinidump(lldb::TargetSP target_sp,
142                                  lldb::ListenerSP listener_sp,
143                                  const FileSpec &core_file,
144                                  MinidumpParser minidump_parser)
145     : Process(target_sp, listener_sp), m_minidump_parser(minidump_parser),
146       m_core_file(core_file), m_is_wow64(false) {}
147 
148 ProcessMinidump::~ProcessMinidump() {
149   Clear();
150   // We need to call finalize on the process before destroying ourselves to
151   // make sure all of the broadcaster cleanup goes as planned. If we destruct
152   // this class, then Process::~Process() might have problems trying to fully
153   // destroy the broadcaster.
154   Finalize();
155 }
156 
157 void ProcessMinidump::Initialize() {
158   static llvm::once_flag g_once_flag;
159 
160   llvm::call_once(g_once_flag, []() {
161     PluginManager::RegisterPlugin(GetPluginNameStatic(),
162                                   GetPluginDescriptionStatic(),
163                                   ProcessMinidump::CreateInstance);
164   });
165 }
166 
167 void ProcessMinidump::Terminate() {
168   PluginManager::UnregisterPlugin(ProcessMinidump::CreateInstance);
169 }
170 
171 Status ProcessMinidump::DoLoadCore() {
172   Status error;
173 
174   // Minidump parser initialization & consistency checks
175   error = m_minidump_parser.Initialize();
176   if (error.Fail())
177     return error;
178 
179   // Do we support the minidump's architecture?
180   ArchSpec arch = GetArchitecture();
181   switch (arch.GetMachine()) {
182   case llvm::Triple::x86:
183   case llvm::Triple::x86_64:
184   case llvm::Triple::arm:
185   case llvm::Triple::aarch64:
186     // Any supported architectures must be listed here and also supported in
187     // ThreadMinidump::CreateRegisterContextForFrame().
188     break;
189   default:
190     error.SetErrorStringWithFormat("unsupported minidump architecture: %s",
191                                    arch.GetArchitectureName());
192     return error;
193   }
194   GetTarget().SetArchitecture(arch, true /*set_platform*/);
195 
196   m_thread_list = m_minidump_parser.GetThreads();
197   m_active_exception = m_minidump_parser.GetExceptionStream();
198   ReadModuleList();
199 
200   llvm::Optional<lldb::pid_t> pid = m_minidump_parser.GetPid();
201   if (!pid) {
202     error.SetErrorString("failed to parse PID");
203     return error;
204   }
205   SetID(pid.getValue());
206 
207   return error;
208 }
209 
210 ConstString ProcessMinidump::GetPluginName() { return GetPluginNameStatic(); }
211 
212 uint32_t ProcessMinidump::GetPluginVersion() { return 1; }
213 
214 Status ProcessMinidump::DoDestroy() { return Status(); }
215 
216 void ProcessMinidump::RefreshStateAfterStop() {
217   if (!m_active_exception)
218     return;
219 
220   if (m_active_exception->exception_record.exception_code ==
221       MinidumpException::DumpRequested) {
222     return;
223   }
224 
225   lldb::StopInfoSP stop_info;
226   lldb::ThreadSP stop_thread;
227 
228   Process::m_thread_list.SetSelectedThreadByID(m_active_exception->thread_id);
229   stop_thread = Process::m_thread_list.GetSelectedThread();
230   ArchSpec arch = GetArchitecture();
231 
232   if (arch.GetTriple().getOS() == llvm::Triple::Linux) {
233     stop_info = StopInfo::CreateStopReasonWithSignal(
234         *stop_thread, m_active_exception->exception_record.exception_code);
235   } else if (arch.GetTriple().getVendor() == llvm::Triple::Apple) {
236     stop_info = StopInfoMachException::CreateStopReasonWithMachException(
237         *stop_thread, m_active_exception->exception_record.exception_code, 2,
238         m_active_exception->exception_record.exception_flags,
239         m_active_exception->exception_record.exception_address, 0);
240   } else {
241     std::string desc;
242     llvm::raw_string_ostream desc_stream(desc);
243     desc_stream << "Exception "
244                 << llvm::format_hex(
245                        m_active_exception->exception_record.exception_code, 8)
246                 << " encountered at address "
247                 << llvm::format_hex(
248                        m_active_exception->exception_record.exception_address,
249                        8);
250     stop_info = StopInfo::CreateStopReasonWithException(
251         *stop_thread, desc_stream.str().c_str());
252   }
253 
254   stop_thread->SetStopInfo(stop_info);
255 }
256 
257 bool ProcessMinidump::IsAlive() { return true; }
258 
259 bool ProcessMinidump::WarnBeforeDetach() const { return false; }
260 
261 size_t ProcessMinidump::ReadMemory(lldb::addr_t addr, void *buf, size_t size,
262                                    Status &error) {
263   // Don't allow the caching that lldb_private::Process::ReadMemory does since
264   // we have it all cached in our dump file anyway.
265   return DoReadMemory(addr, buf, size, error);
266 }
267 
268 size_t ProcessMinidump::DoReadMemory(lldb::addr_t addr, void *buf, size_t size,
269                                      Status &error) {
270 
271   llvm::ArrayRef<uint8_t> mem = m_minidump_parser.GetMemory(addr, size);
272   if (mem.empty()) {
273     error.SetErrorString("could not parse memory info");
274     return 0;
275   }
276 
277   std::memcpy(buf, mem.data(), mem.size());
278   return mem.size();
279 }
280 
281 ArchSpec ProcessMinidump::GetArchitecture() {
282   if (!m_is_wow64) {
283     return m_minidump_parser.GetArchitecture();
284   }
285 
286   llvm::Triple triple;
287   triple.setVendor(llvm::Triple::VendorType::UnknownVendor);
288   triple.setArch(llvm::Triple::ArchType::x86);
289   triple.setOS(llvm::Triple::OSType::Win32);
290   return ArchSpec(triple);
291 }
292 
293 Status ProcessMinidump::GetMemoryRegionInfo(lldb::addr_t load_addr,
294                                             MemoryRegionInfo &range_info) {
295   range_info = m_minidump_parser.GetMemoryRegionInfo(load_addr);
296   return Status();
297 }
298 
299 Status ProcessMinidump::GetMemoryRegions(
300     lldb_private::MemoryRegionInfos &region_list) {
301   region_list = m_minidump_parser.GetMemoryRegions();
302   return Status();
303 }
304 
305 void ProcessMinidump::Clear() { Process::m_thread_list.Clear(); }
306 
307 bool ProcessMinidump::UpdateThreadList(ThreadList &old_thread_list,
308                                        ThreadList &new_thread_list) {
309   for (const MinidumpThread& thread : m_thread_list) {
310     MinidumpLocationDescriptor context_location = thread.thread_context;
311 
312     // If the minidump contains an exception context, use it
313     if (m_active_exception != nullptr &&
314         m_active_exception->thread_id == thread.thread_id) {
315       context_location = m_active_exception->thread_context;
316     }
317 
318     llvm::ArrayRef<uint8_t> context;
319     if (!m_is_wow64)
320       context = m_minidump_parser.GetThreadContext(context_location);
321     else
322       context = m_minidump_parser.GetThreadContextWow64(thread);
323 
324     lldb::ThreadSP thread_sp(new ThreadMinidump(*this, thread, context));
325     new_thread_list.AddThread(thread_sp);
326   }
327   return new_thread_list.GetSize(false) > 0;
328 }
329 
330 void ProcessMinidump::ReadModuleList() {
331   std::vector<const MinidumpModule *> filtered_modules =
332       m_minidump_parser.GetFilteredModuleList();
333 
334   for (auto module : filtered_modules) {
335     llvm::Optional<std::string> name =
336         m_minidump_parser.GetMinidumpString(module->module_name_rva);
337 
338     if (!name)
339       continue;
340 
341     Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_MODULES));
342     if (log) {
343       log->Printf("ProcessMinidump::%s found module: name: %s %#010" PRIx64
344                   "-%#010" PRIx64 " size: %" PRIu32,
345                   __FUNCTION__, name.getValue().c_str(),
346                   uint64_t(module->base_of_image),
347                   module->base_of_image + module->size_of_image,
348                   uint32_t(module->size_of_image));
349     }
350 
351     // check if the process is wow64 - a 32 bit windows process running on a
352     // 64 bit windows
353     if (llvm::StringRef(name.getValue()).endswith_lower("wow64.dll")) {
354       m_is_wow64 = true;
355     }
356 
357     const auto uuid = m_minidump_parser.GetModuleUUID(module);
358     auto file_spec = FileSpec(name.getValue(), GetArchitecture().GetTriple());
359     FileSystem::Instance().Resolve(file_spec);
360     ModuleSpec module_spec(file_spec, uuid);
361     Status error;
362     lldb::ModuleSP module_sp = GetTarget().GetSharedModule(module_spec, &error);
363     if (!module_sp || error.Fail()) {
364       // We failed to locate a matching local object file. Fortunately, the
365       // minidump format encodes enough information about each module's memory
366       // range to allow us to create placeholder modules.
367       //
368       // This enables most LLDB functionality involving address-to-module
369       // translations (ex. identifing the module for a stack frame PC) and
370       // modules/sections commands (ex. target modules list, ...)
371       if (log) {
372         log->Printf("Unable to locate the matching object file, creating a "
373                     "placeholder module for: %s",
374                     name.getValue().c_str());
375       }
376 
377       auto placeholder_module =
378           std::make_shared<PlaceholderModule>(module_spec);
379       placeholder_module->CreateImageSection(module, GetTarget());
380       module_sp = placeholder_module;
381       GetTarget().GetImages().Append(module_sp);
382     }
383 
384     if (log) {
385       log->Printf("ProcessMinidump::%s load module: name: %s", __FUNCTION__,
386                   name.getValue().c_str());
387     }
388 
389     bool load_addr_changed = false;
390     module_sp->SetLoadAddress(GetTarget(), module->base_of_image, false,
391                               load_addr_changed);
392   }
393 }
394 
395 bool ProcessMinidump::GetProcessInfo(ProcessInstanceInfo &info) {
396   info.Clear();
397   info.SetProcessID(GetID());
398   info.SetArchitecture(GetArchitecture());
399   lldb::ModuleSP module_sp = GetTarget().GetExecutableModule();
400   if (module_sp) {
401     const bool add_exe_file_as_first_arg = false;
402     info.SetExecutableFile(GetTarget().GetExecutableModule()->GetFileSpec(),
403                            add_exe_file_as_first_arg);
404   }
405   return true;
406 }
407 
408 // For minidumps there's no runtime generated code so we don't need JITLoader(s)
409 // Avoiding them will also speed up minidump loading since JITLoaders normally
410 // try to set up symbolic breakpoints, which in turn may force loading more
411 // debug information than needed.
412 JITLoaderList &ProcessMinidump::GetJITLoaders() {
413   if (!m_jit_loaders_ap) {
414     m_jit_loaders_ap = llvm::make_unique<JITLoaderList>();
415   }
416   return *m_jit_loaders_ap;
417 }
418 
419 #define INIT_BOOL(VAR, LONG, SHORT, DESC) \
420     VAR(LLDB_OPT_SET_1, false, LONG, SHORT, DESC, false, true)
421 #define APPEND_OPT(VAR) \
422     m_option_group.Append(&VAR, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1)
423 
424 class CommandObjectProcessMinidumpDump : public CommandObjectParsed {
425 private:
426   OptionGroupOptions m_option_group;
427   OptionGroupBoolean m_dump_all;
428   OptionGroupBoolean m_dump_directory;
429   OptionGroupBoolean m_dump_linux_cpuinfo;
430   OptionGroupBoolean m_dump_linux_proc_status;
431   OptionGroupBoolean m_dump_linux_lsb_release;
432   OptionGroupBoolean m_dump_linux_cmdline;
433   OptionGroupBoolean m_dump_linux_environ;
434   OptionGroupBoolean m_dump_linux_auxv;
435   OptionGroupBoolean m_dump_linux_maps;
436   OptionGroupBoolean m_dump_linux_proc_stat;
437   OptionGroupBoolean m_dump_linux_proc_uptime;
438   OptionGroupBoolean m_dump_linux_proc_fd;
439   OptionGroupBoolean m_dump_linux_all;
440 
441   void SetDefaultOptionsIfNoneAreSet() {
442     if (m_dump_all.GetOptionValue().GetCurrentValue() ||
443         m_dump_linux_all.GetOptionValue().GetCurrentValue() ||
444         m_dump_directory.GetOptionValue().GetCurrentValue() ||
445         m_dump_linux_cpuinfo.GetOptionValue().GetCurrentValue() ||
446         m_dump_linux_proc_status.GetOptionValue().GetCurrentValue() ||
447         m_dump_linux_lsb_release.GetOptionValue().GetCurrentValue() ||
448         m_dump_linux_cmdline.GetOptionValue().GetCurrentValue() ||
449         m_dump_linux_environ.GetOptionValue().GetCurrentValue() ||
450         m_dump_linux_auxv.GetOptionValue().GetCurrentValue() ||
451         m_dump_linux_maps.GetOptionValue().GetCurrentValue() ||
452         m_dump_linux_proc_stat.GetOptionValue().GetCurrentValue() ||
453         m_dump_linux_proc_uptime.GetOptionValue().GetCurrentValue() ||
454         m_dump_linux_proc_fd.GetOptionValue().GetCurrentValue())
455       return;
456     // If no options were set, then dump everything
457     m_dump_all.GetOptionValue().SetCurrentValue(true);
458   }
459   bool DumpAll() const {
460     return m_dump_all.GetOptionValue().GetCurrentValue();
461   }
462   bool DumpDirectory() const {
463     return DumpAll() ||
464         m_dump_directory.GetOptionValue().GetCurrentValue();
465   }
466   bool DumpLinux() const {
467     return DumpAll() || m_dump_linux_all.GetOptionValue().GetCurrentValue();
468   }
469   bool DumpLinuxCPUInfo() const {
470     return DumpLinux() ||
471         m_dump_linux_cpuinfo.GetOptionValue().GetCurrentValue();
472   }
473   bool DumpLinuxProcStatus() const {
474     return DumpLinux() ||
475         m_dump_linux_proc_status.GetOptionValue().GetCurrentValue();
476   }
477   bool DumpLinuxProcStat() const {
478     return DumpLinux() ||
479         m_dump_linux_proc_stat.GetOptionValue().GetCurrentValue();
480   }
481   bool DumpLinuxLSBRelease() const {
482     return DumpLinux() ||
483         m_dump_linux_lsb_release.GetOptionValue().GetCurrentValue();
484   }
485   bool DumpLinuxCMDLine() const {
486     return DumpLinux() ||
487         m_dump_linux_cmdline.GetOptionValue().GetCurrentValue();
488   }
489   bool DumpLinuxEnviron() const {
490     return DumpLinux() ||
491         m_dump_linux_environ.GetOptionValue().GetCurrentValue();
492   }
493   bool DumpLinuxAuxv() const {
494     return DumpLinux() ||
495         m_dump_linux_auxv.GetOptionValue().GetCurrentValue();
496   }
497   bool DumpLinuxMaps() const {
498     return DumpLinux() ||
499         m_dump_linux_maps.GetOptionValue().GetCurrentValue();
500   }
501   bool DumpLinuxProcUptime() const {
502     return DumpLinux() ||
503         m_dump_linux_proc_uptime.GetOptionValue().GetCurrentValue();
504   }
505   bool DumpLinuxProcFD() const {
506     return DumpLinux() ||
507         m_dump_linux_proc_fd.GetOptionValue().GetCurrentValue();
508   }
509 public:
510 
511   CommandObjectProcessMinidumpDump(CommandInterpreter &interpreter)
512   : CommandObjectParsed(interpreter, "process plugin dump",
513       "Dump information from the minidump file.", NULL),
514     m_option_group(),
515     INIT_BOOL(m_dump_all, "all", 'a',
516               "Dump the everything in the minidump."),
517     INIT_BOOL(m_dump_directory, "directory", 'd',
518               "Dump the minidump directory map."),
519     INIT_BOOL(m_dump_linux_cpuinfo, "cpuinfo", 'C',
520               "Dump linux /proc/cpuinfo."),
521     INIT_BOOL(m_dump_linux_proc_status, "status", 's',
522               "Dump linux /proc/<pid>/status."),
523     INIT_BOOL(m_dump_linux_lsb_release, "lsb-release", 'r',
524               "Dump linux /etc/lsb-release."),
525     INIT_BOOL(m_dump_linux_cmdline, "cmdline", 'c',
526               "Dump linux /proc/<pid>/cmdline."),
527     INIT_BOOL(m_dump_linux_environ, "environ", 'e',
528               "Dump linux /proc/<pid>/environ."),
529     INIT_BOOL(m_dump_linux_auxv, "auxv", 'x',
530               "Dump linux /proc/<pid>/auxv."),
531     INIT_BOOL(m_dump_linux_maps, "maps", 'm',
532               "Dump linux /proc/<pid>/maps."),
533     INIT_BOOL(m_dump_linux_proc_stat, "stat", 'S',
534               "Dump linux /proc/<pid>/stat."),
535     INIT_BOOL(m_dump_linux_proc_uptime, "uptime", 'u',
536               "Dump linux process uptime."),
537     INIT_BOOL(m_dump_linux_proc_fd, "fd", 'f',
538               "Dump linux /proc/<pid>/fd."),
539     INIT_BOOL(m_dump_linux_all, "linux", 'l',
540               "Dump all linux streams.") {
541     APPEND_OPT(m_dump_all);
542     APPEND_OPT(m_dump_directory);
543     APPEND_OPT(m_dump_linux_cpuinfo);
544     APPEND_OPT(m_dump_linux_proc_status);
545     APPEND_OPT(m_dump_linux_lsb_release);
546     APPEND_OPT(m_dump_linux_cmdline);
547     APPEND_OPT(m_dump_linux_environ);
548     APPEND_OPT(m_dump_linux_auxv);
549     APPEND_OPT(m_dump_linux_maps);
550     APPEND_OPT(m_dump_linux_proc_stat);
551     APPEND_OPT(m_dump_linux_proc_uptime);
552     APPEND_OPT(m_dump_linux_proc_fd);
553     APPEND_OPT(m_dump_linux_all);
554     m_option_group.Finalize();
555   }
556 
557   ~CommandObjectProcessMinidumpDump() {}
558 
559   Options *GetOptions() override { return &m_option_group; }
560 
561   bool DoExecute(Args &command, CommandReturnObject &result) override {
562     const size_t argc = command.GetArgumentCount();
563     if (argc > 0) {
564       result.AppendErrorWithFormat("'%s' take no arguments, only options",
565                                    m_cmd_name.c_str());
566       result.SetStatus(eReturnStatusFailed);
567       return false;
568     }
569     SetDefaultOptionsIfNoneAreSet();
570 
571     ProcessMinidump *process = static_cast<ProcessMinidump *>(
572         m_interpreter.GetExecutionContext().GetProcessPtr());
573     result.SetStatus(eReturnStatusSuccessFinishResult);
574     Stream &s = result.GetOutputStream();
575     MinidumpParser &minidump = process->m_minidump_parser;
576     if (DumpDirectory()) {
577       s.Printf("RVA        SIZE       TYPE       MinidumpStreamType\n");
578       s.Printf("---------- ---------- ---------- --------------------------\n");
579       for (const auto &pair: minidump.GetDirectoryMap())
580         s.Printf("0x%8.8x 0x%8.8x 0x%8.8x %s\n", (uint32_t)pair.second.rva,
581                  (uint32_t)pair.second.data_size, pair.first,
582                  MinidumpParser::GetStreamTypeAsString(pair.first).data());
583       s.Printf("\n");
584     }
585     auto DumpTextStream = [&](MinidumpStreamType stream_type,
586                               llvm::StringRef label) -> void {
587       auto bytes = minidump.GetStream(stream_type);
588       if (!bytes.empty()) {
589         if (label.empty())
590           label = MinidumpParser::GetStreamTypeAsString((uint32_t)stream_type);
591         s.Printf("%s:\n%s\n\n", label.data(), bytes.data());
592       }
593     };
594     auto DumpBinaryStream = [&](MinidumpStreamType stream_type,
595                                 llvm::StringRef label) -> void {
596       auto bytes = minidump.GetStream(stream_type);
597       if (!bytes.empty()) {
598         if (label.empty())
599           label = MinidumpParser::GetStreamTypeAsString((uint32_t)stream_type);
600         s.Printf("%s:\n", label.data());
601         DataExtractor data(bytes.data(), bytes.size(), eByteOrderLittle,
602                            process->GetAddressByteSize());
603         DumpDataExtractor(data, &s, 0, lldb::eFormatBytesWithASCII, 1,
604                           bytes.size(), 16, 0, 0, 0);
605         s.Printf("\n\n");
606       }
607     };
608 
609     if (DumpLinuxCPUInfo())
610       DumpTextStream(MinidumpStreamType::LinuxCPUInfo, "/proc/cpuinfo");
611     if (DumpLinuxProcStatus())
612       DumpTextStream(MinidumpStreamType::LinuxProcStatus, "/proc/PID/status");
613     if (DumpLinuxLSBRelease())
614       DumpTextStream(MinidumpStreamType::LinuxLSBRelease, "/etc/lsb-release");
615     if (DumpLinuxCMDLine())
616       DumpTextStream(MinidumpStreamType::LinuxCMDLine, "/proc/PID/cmdline");
617     if (DumpLinuxEnviron())
618       DumpTextStream(MinidumpStreamType::LinuxEnviron, "/proc/PID/environ");
619     if (DumpLinuxAuxv())
620       DumpBinaryStream(MinidumpStreamType::LinuxAuxv, "/proc/PID/auxv");
621     if (DumpLinuxMaps())
622       DumpTextStream(MinidumpStreamType::LinuxMaps, "/proc/PID/maps");
623     if (DumpLinuxProcStat())
624       DumpTextStream(MinidumpStreamType::LinuxProcStat, "/proc/PID/stat");
625     if (DumpLinuxProcUptime())
626       DumpTextStream(MinidumpStreamType::LinuxProcUptime, "uptime");
627     if (DumpLinuxProcFD())
628       DumpTextStream(MinidumpStreamType::LinuxProcFD, "/proc/PID/fd");
629     return true;
630   }
631 };
632 
633 class CommandObjectMultiwordProcessMinidump : public CommandObjectMultiword {
634 public:
635   CommandObjectMultiwordProcessMinidump(CommandInterpreter &interpreter)
636     : CommandObjectMultiword(interpreter, "process plugin",
637           "Commands for operating on a ProcessMinidump process.",
638           "process plugin <subcommand> [<subcommand-options>]") {
639     LoadSubCommand("dump",
640         CommandObjectSP(new CommandObjectProcessMinidumpDump(interpreter)));
641   }
642 
643   ~CommandObjectMultiwordProcessMinidump() {}
644 };
645 
646 CommandObject *ProcessMinidump::GetPluginCommandObject() {
647   if (!m_command_sp)
648     m_command_sp.reset(new CommandObjectMultiwordProcessMinidump(
649         GetTarget().GetDebugger().GetCommandInterpreter()));
650   return m_command_sp.get();
651 }
652