Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 929 insertions, 0 deletions

diff --git a/gnu/llvm/lldb/source/Plugins/Process/minidump/ProcessMinidump.cpp b/gnu/llvm/lldb/source/Plugins/Process/minidump/ProcessMinidump.cpp
new file mode 100644
index 00000000000..5c090dc6e12
--- /dev/null
+++ b/gnu/llvm/lldb/source/Plugins/Process/minidump/ProcessMinidump.cpp
@@ -0,0 +1,929 @@
+//===-- ProcessMinidump.cpp -------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "ProcessMinidump.h"
+
+#include "ThreadMinidump.h"
+
+#include "lldb/Core/DumpDataExtractor.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/ModuleSpec.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/Section.h"
+#include "lldb/Interpreter/CommandInterpreter.h"
+#include "lldb/Interpreter/CommandObject.h"
+#include "lldb/Interpreter/CommandObjectMultiword.h"
+#include "lldb/Interpreter/CommandReturnObject.h"
+#include "lldb/Interpreter/OptionArgParser.h"
+#include "lldb/Interpreter/OptionGroupBoolean.h"
+#include "lldb/Target/JITLoaderList.h"
+#include "lldb/Target/MemoryRegionInfo.h"
+#include "lldb/Target/SectionLoadList.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/UnixSignals.h"
+#include "lldb/Utility/LLDBAssert.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/State.h"
+#include "llvm/BinaryFormat/Magic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Threading.h"
+
+#include "Plugins/Process/Utility/StopInfoMachException.h"
+
+#include <memory>
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace minidump;
+
+namespace {
+
+/// A minimal ObjectFile implementation providing a dummy object file for the
+/// cases when the real module binary is not available. This allows the module
+/// to show up in "image list" and symbols to be added to it.
+class PlaceholderObjectFile : public ObjectFile {
+public:
+  PlaceholderObjectFile(const lldb::ModuleSP &module_sp,
+                        const ModuleSpec &module_spec, lldb::addr_t base,
+                        lldb::addr_t size)
+      : ObjectFile(module_sp, &module_spec.GetFileSpec(), /*file_offset*/ 0,
+                   /*length*/ 0, /*data_sp*/ nullptr, /*data_offset*/ 0),
+        m_arch(module_spec.GetArchitecture()), m_uuid(module_spec.GetUUID()),
+        m_base(base), m_size(size) {
+    m_symtab_up = std::make_unique<Symtab>(this);
+  }
+
+  static ConstString GetStaticPluginName() {
+    return ConstString("placeholder");
+  }
+  ConstString GetPluginName() override { return GetStaticPluginName(); }
+  uint32_t GetPluginVersion() override { return 1; }
+  bool ParseHeader() override { return true; }
+  Type CalculateType() override { return eTypeUnknown; }
+  Strata CalculateStrata() override { return eStrataUnknown; }
+  uint32_t GetDependentModules(FileSpecList &file_list) override { return 0; }
+  bool IsExecutable() const override { return false; }
+  ArchSpec GetArchitecture() override { return m_arch; }
+  UUID GetUUID() override { return m_uuid; }
+  Symtab *GetSymtab() override { return m_symtab_up.get(); }
+  bool IsStripped() override { return true; }
+  ByteOrder GetByteOrder() const override { return m_arch.GetByteOrder(); }
+
+  uint32_t GetAddressByteSize() const override {
+    return m_arch.GetAddressByteSize();
+  }
+
+  Address GetBaseAddress() override {
+    return Address(m_sections_up->GetSectionAtIndex(0), 0);
+  }
+
+  void CreateSections(SectionList &unified_section_list) override {
+    m_sections_up = std::make_unique<SectionList>();
+    auto section_sp = std::make_shared<Section>(
+        GetModule(), this, /*sect_id*/ 0, ConstString(".module_image"),
+        eSectionTypeOther, m_base, m_size, /*file_offset*/ 0, /*file_size*/ 0,
+        /*log2align*/ 0, /*flags*/ 0);
+    section_sp->SetPermissions(ePermissionsReadable | ePermissionsExecutable);
+    m_sections_up->AddSection(section_sp);
+    unified_section_list.AddSection(std::move(section_sp));
+  }
+
+  bool SetLoadAddress(Target &target, addr_t value,
+                      bool value_is_offset) override {
+    assert(!value_is_offset);
+    assert(value == m_base);
+
+    // Create sections if they haven't been created already.
+    GetModule()->GetSectionList();
+    assert(m_sections_up->GetNumSections(0) == 1);
+
+    target.GetSectionLoadList().SetSectionLoadAddress(
+        m_sections_up->GetSectionAtIndex(0), m_base);
+    return true;
+  }
+
+  void Dump(Stream *s) override {
+    s->Format("Placeholder object file for {0} loaded at [{1:x}-{2:x})\n",
+              GetFileSpec(), m_base, m_base + m_size);
+  }
+
+  lldb::addr_t GetBaseImageAddress() const { return m_base; }
+private:
+  ArchSpec m_arch;
+  UUID m_uuid;
+  lldb::addr_t m_base;
+  lldb::addr_t m_size;
+};
+} // namespace
+
+ConstString ProcessMinidump::GetPluginNameStatic() {
+  static ConstString g_name("minidump");
+  return g_name;
+}
+
+const char *ProcessMinidump::GetPluginDescriptionStatic() {
+  return "Minidump plug-in.";
+}
+
+lldb::ProcessSP ProcessMinidump::CreateInstance(lldb::TargetSP target_sp,
+                                                lldb::ListenerSP listener_sp,
+                                                const FileSpec *crash_file) {
+  if (!crash_file)
+    return nullptr;
+
+  lldb::ProcessSP process_sp;
+  // Read enough data for the Minidump header
+  constexpr size_t header_size = sizeof(Header);
+  auto DataPtr = FileSystem::Instance().CreateDataBuffer(crash_file->GetPath(),
+                                                         header_size, 0);
+  if (!DataPtr)
+    return nullptr;
+
+  lldbassert(DataPtr->GetByteSize() == header_size);
+  if (identify_magic(toStringRef(DataPtr->GetData())) != llvm::file_magic::minidump)
+    return nullptr;
+
+  auto AllData =
+      FileSystem::Instance().CreateDataBuffer(crash_file->GetPath(), -1, 0);
+  if (!AllData)
+    return nullptr;
+
+  return std::make_shared<ProcessMinidump>(target_sp, listener_sp, *crash_file,
+                                           std::move(AllData));
+}
+
+bool ProcessMinidump::CanDebug(lldb::TargetSP target_sp,
+                               bool plugin_specified_by_name) {
+  return true;
+}
+
+ProcessMinidump::ProcessMinidump(lldb::TargetSP target_sp,
+                                 lldb::ListenerSP listener_sp,
+                                 const FileSpec &core_file,
+                                 DataBufferSP core_data)
+    : Process(target_sp, listener_sp), m_core_file(core_file),
+      m_core_data(std::move(core_data)), m_is_wow64(false) {}
+
+ProcessMinidump::~ProcessMinidump() {
+  Clear();
+  // We need to call finalize on the process before destroying ourselves to
+  // make sure all of the broadcaster cleanup goes as planned. If we destruct
+  // this class, then Process::~Process() might have problems trying to fully
+  // destroy the broadcaster.
+  Finalize();
+}
+
+void ProcessMinidump::Initialize() {
+  static llvm::once_flag g_once_flag;
+
+  llvm::call_once(g_once_flag, []() {
+    PluginManager::RegisterPlugin(GetPluginNameStatic(),
+                                  GetPluginDescriptionStatic(),
+                                  ProcessMinidump::CreateInstance);
+  });
+}
+
+void ProcessMinidump::Terminate() {
+  PluginManager::UnregisterPlugin(ProcessMinidump::CreateInstance);
+}
+
+Status ProcessMinidump::DoLoadCore() {
+  auto expected_parser = MinidumpParser::Create(m_core_data);
+  if (!expected_parser)
+    return Status(expected_parser.takeError());
+  m_minidump_parser = std::move(*expected_parser);
+
+  Status error;
+
+  // Do we support the minidump's architecture?
+  ArchSpec arch = GetArchitecture();
+  switch (arch.GetMachine()) {
+  case llvm::Triple::x86:
+  case llvm::Triple::x86_64:
+  case llvm::Triple::arm:
+  case llvm::Triple::aarch64:
+    // Any supported architectures must be listed here and also supported in
+    // ThreadMinidump::CreateRegisterContextForFrame().
+    break;
+  default:
+    error.SetErrorStringWithFormat("unsupported minidump architecture: %s",
+                                   arch.GetArchitectureName());
+    return error;
+  }
+  GetTarget().SetArchitecture(arch, true /*set_platform*/);
+
+  m_thread_list = m_minidump_parser->GetThreads();
+  m_active_exception = m_minidump_parser->GetExceptionStream();
+
+  SetUnixSignals(UnixSignals::Create(GetArchitecture()));
+
+  ReadModuleList();
+
+  llvm::Optional<lldb::pid_t> pid = m_minidump_parser->GetPid();
+  if (!pid) {
+    error.SetErrorString("failed to parse PID");
+    return error;
+  }
+  SetID(pid.getValue());
+
+  return error;
+}
+
+ConstString ProcessMinidump::GetPluginName() { return GetPluginNameStatic(); }
+
+uint32_t ProcessMinidump::GetPluginVersion() { return 1; }
+
+Status ProcessMinidump::DoDestroy() { return Status(); }
+
+void ProcessMinidump::RefreshStateAfterStop() {
+
+  if (!m_active_exception)
+    return;
+
+  constexpr uint32_t BreakpadDumpRequested = 0xFFFFFFFF;
+  if (m_active_exception->ExceptionRecord.ExceptionCode ==
+      BreakpadDumpRequested) {
+    // This "ExceptionCode" value is a sentinel that is sometimes used
+    // when generating a dump for a process that hasn't crashed.
+
+    // TODO: The definition and use of this "dump requested" constant
+    // in Breakpad are actually Linux-specific, and for similar use
+    // cases on Mac/Windows it defines differnt constants, referring
+    // to them as "simulated" exceptions; consider moving this check
+    // down to the OS-specific paths and checking each OS for its own
+    // constant.
+    return;
+  }
+
+  lldb::StopInfoSP stop_info;
+  lldb::ThreadSP stop_thread;
+
+  Process::m_thread_list.SetSelectedThreadByID(m_active_exception->ThreadId);
+  stop_thread = Process::m_thread_list.GetSelectedThread();
+  ArchSpec arch = GetArchitecture();
+
+  if (arch.GetTriple().getOS() == llvm::Triple::Linux) {
+    uint32_t signo = m_active_exception->ExceptionRecord.ExceptionCode;
+
+    if (signo == 0) {
+      // No stop.
+      return;
+    }
+
+    stop_info = StopInfo::CreateStopReasonWithSignal(
+        *stop_thread, signo);
+  } else if (arch.GetTriple().getVendor() == llvm::Triple::Apple) {
+    stop_info = StopInfoMachException::CreateStopReasonWithMachException(
+        *stop_thread, m_active_exception->ExceptionRecord.ExceptionCode, 2,
+        m_active_exception->ExceptionRecord.ExceptionFlags,
+        m_active_exception->ExceptionRecord.ExceptionAddress, 0);
+  } else {
+    std::string desc;
+    llvm::raw_string_ostream desc_stream(desc);
+    desc_stream << "Exception "
+                << llvm::format_hex(
+                       m_active_exception->ExceptionRecord.ExceptionCode, 8)
+                << " encountered at address "
+                << llvm::format_hex(
+                       m_active_exception->ExceptionRecord.ExceptionAddress, 8);
+    stop_info = StopInfo::CreateStopReasonWithException(
+        *stop_thread, desc_stream.str().c_str());
+  }
+
+  stop_thread->SetStopInfo(stop_info);
+}
+
+bool ProcessMinidump::IsAlive() { return true; }
+
+bool ProcessMinidump::WarnBeforeDetach() const { return false; }
+
+size_t ProcessMinidump::ReadMemory(lldb::addr_t addr, void *buf, size_t size,
+                                   Status &error) {
+  // Don't allow the caching that lldb_private::Process::ReadMemory does since
+  // we have it all cached in our dump file anyway.
+  return DoReadMemory(addr, buf, size, error);
+}
+
+size_t ProcessMinidump::DoReadMemory(lldb::addr_t addr, void *buf, size_t size,
+                                     Status &error) {
+
+  llvm::ArrayRef<uint8_t> mem = m_minidump_parser->GetMemory(addr, size);
+  if (mem.empty()) {
+    error.SetErrorString("could not parse memory info");
+    return 0;
+  }
+
+  std::memcpy(buf, mem.data(), mem.size());
+  return mem.size();
+}
+
+ArchSpec ProcessMinidump::GetArchitecture() {
+  if (!m_is_wow64) {
+    return m_minidump_parser->GetArchitecture();
+  }
+
+  llvm::Triple triple;
+  triple.setVendor(llvm::Triple::VendorType::UnknownVendor);
+  triple.setArch(llvm::Triple::ArchType::x86);
+  triple.setOS(llvm::Triple::OSType::Win32);
+  return ArchSpec(triple);
+}
+
+static MemoryRegionInfo GetMemoryRegionInfo(const MemoryRegionInfos &regions,
+                                            lldb::addr_t load_addr) {
+  MemoryRegionInfo region;
+  auto pos = llvm::upper_bound(regions, load_addr);
+  if (pos != regions.begin() &&
+      std::prev(pos)->GetRange().Contains(load_addr)) {
+    return *std::prev(pos);
+  }
+
+  if (pos == regions.begin())
+    region.GetRange().SetRangeBase(0);
+  else
+    region.GetRange().SetRangeBase(std::prev(pos)->GetRange().GetRangeEnd());
+
+  if (pos == regions.end())
+    region.GetRange().SetRangeEnd(UINT64_MAX);
+  else
+    region.GetRange().SetRangeEnd(pos->GetRange().GetRangeBase());
+
+  region.SetReadable(MemoryRegionInfo::eNo);
+  region.SetWritable(MemoryRegionInfo::eNo);
+  region.SetExecutable(MemoryRegionInfo::eNo);
+  region.SetMapped(MemoryRegionInfo::eNo);
+  return region;
+}
+
+void ProcessMinidump::BuildMemoryRegions() {
+  if (m_memory_regions)
+    return;
+  m_memory_regions.emplace();
+  bool is_complete;
+  std::tie(*m_memory_regions, is_complete) =
+      m_minidump_parser->BuildMemoryRegions();
+
+  if (is_complete)
+    return;
+
+  MemoryRegionInfos to_add;
+  ModuleList &modules = GetTarget().GetImages();
+  SectionLoadList &load_list = GetTarget().GetSectionLoadList();
+  modules.ForEach([&](const ModuleSP &module_sp) {
+    SectionList *sections = module_sp->GetSectionList();
+    for (size_t i = 0; i < sections->GetSize(); ++i) {
+      SectionSP section_sp = sections->GetSectionAtIndex(i);
+      addr_t load_addr = load_list.GetSectionLoadAddress(section_sp);
+      if (load_addr == LLDB_INVALID_ADDRESS)
+        continue;
+      MemoryRegionInfo::RangeType section_range(load_addr,
+                                                section_sp->GetByteSize());
+      MemoryRegionInfo region =
+          ::GetMemoryRegionInfo(*m_memory_regions, load_addr);
+      if (region.GetMapped() != MemoryRegionInfo::eYes &&
+          region.GetRange().GetRangeBase() <= section_range.GetRangeBase() &&
+          section_range.GetRangeEnd() <= region.GetRange().GetRangeEnd()) {
+        to_add.emplace_back();
+        to_add.back().GetRange() = section_range;
+        to_add.back().SetLLDBPermissions(section_sp->GetPermissions());
+        to_add.back().SetMapped(MemoryRegionInfo::eYes);
+        to_add.back().SetName(module_sp->GetFileSpec().GetPath().c_str());
+      }
+    }
+    return true;
+  });
+  m_memory_regions->insert(m_memory_regions->end(), to_add.begin(),
+                           to_add.end());
+  llvm::sort(*m_memory_regions);
+}
+
+Status ProcessMinidump::GetMemoryRegionInfo(lldb::addr_t load_addr,
+                                            MemoryRegionInfo &region) {
+  BuildMemoryRegions();
+  region = ::GetMemoryRegionInfo(*m_memory_regions, load_addr);
+  return Status();
+}
+
+Status ProcessMinidump::GetMemoryRegions(MemoryRegionInfos &region_list) {
+  BuildMemoryRegions();
+  region_list = *m_memory_regions;
+  return Status();
+}
+
+void ProcessMinidump::Clear() { Process::m_thread_list.Clear(); }
+
+bool ProcessMinidump::UpdateThreadList(ThreadList &old_thread_list,
+                                       ThreadList &new_thread_list) {
+  for (const minidump::Thread &thread : m_thread_list) {
+    LocationDescriptor context_location = thread.Context;
+
+    // If the minidump contains an exception context, use it
+    if (m_active_exception != nullptr &&
+        m_active_exception->ThreadId == thread.ThreadId) {
+      context_location = m_active_exception->ThreadContext;
+    }
+
+    llvm::ArrayRef<uint8_t> context;
+    if (!m_is_wow64)
+      context = m_minidump_parser->GetThreadContext(context_location);
+    else
+      context = m_minidump_parser->GetThreadContextWow64(thread);
+
+    lldb::ThreadSP thread_sp(new ThreadMinidump(*this, thread, context));
+    new_thread_list.AddThread(thread_sp);
+  }
+  return new_thread_list.GetSize(false) > 0;
+}
+
+void ProcessMinidump::ReadModuleList() {
+  std::vector<const minidump::Module *> filtered_modules =
+      m_minidump_parser->GetFilteredModuleList();
+
+  Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
+
+  for (auto module : filtered_modules) {
+    std::string name = cantFail(m_minidump_parser->GetMinidumpFile().getString(
+        module->ModuleNameRVA));
+    const uint64_t load_addr = module->BaseOfImage;
+    const uint64_t load_size = module->SizeOfImage;
+    LLDB_LOG(log, "found module: name: {0} {1:x10}-{2:x10} size: {3}", name,
+             load_addr, load_addr + load_size, load_size);
+
+    // check if the process is wow64 - a 32 bit windows process running on a
+    // 64 bit windows
+    if (llvm::StringRef(name).endswith_lower("wow64.dll")) {
+      m_is_wow64 = true;
+    }
+
+    const auto uuid = m_minidump_parser->GetModuleUUID(module);
+    auto file_spec = FileSpec(name, GetArchitecture().GetTriple());
+    ModuleSpec module_spec(file_spec, uuid);
+    module_spec.GetArchitecture() = GetArchitecture();
+    Status error;
+    // Try and find a module with a full UUID that matches. This function will
+    // add the module to the target if it finds one.
+    lldb::ModuleSP module_sp = GetTarget().GetOrCreateModule(module_spec,
+                                                     true /* notify */, &error);
+    if (!module_sp) {
+      // Try and find a module without specifying the UUID and only looking for
+      // the file given a basename. We then will look for a partial UUID match
+      // if we find any matches. This function will add the module to the
+      // target if it finds one, so we need to remove the module from the target
+      // if the UUID doesn't match during our manual UUID verification. This
+      // allows the "target.exec-search-paths" setting to specify one or more
+      // directories that contain executables that can be searched for matches.
+      ModuleSpec basename_module_spec(module_spec);
+      basename_module_spec.GetUUID().Clear();
+      basename_module_spec.GetFileSpec().GetDirectory().Clear();
+      module_sp = GetTarget().GetOrCreateModule(basename_module_spec,
+                                                true /* notify */, &error);
+      if (module_sp) {
+        // We consider the module to be a match if the minidump UUID is a
+        // prefix of the actual UUID, or if either of the UUIDs are empty.
+        const auto dmp_bytes = uuid.GetBytes();
+        const auto mod_bytes = module_sp->GetUUID().GetBytes();
+        const bool match = dmp_bytes.empty() || mod_bytes.empty() ||
+            mod_bytes.take_front(dmp_bytes.size()) == dmp_bytes;
+        if (!match) {
+            GetTarget().GetImages().Remove(module_sp);
+            module_sp.reset();
+        }
+      }
+    }
+    if (module_sp) {
+      // Watch out for place holder modules that have different paths, but the
+      // same UUID. If the base address is different, create a new module. If
+      // we don't then we will end up setting the load address of a different
+      // PlaceholderObjectFile and an assertion will fire.
+      auto *objfile = module_sp->GetObjectFile();
+      if (objfile && objfile->GetPluginName() ==
+          PlaceholderObjectFile::GetStaticPluginName()) {
+        if (((PlaceholderObjectFile *)objfile)->GetBaseImageAddress() !=
+            load_addr)
+          module_sp.reset();
+      }
+    }
+    if (!module_sp) {
+      // We failed to locate a matching local object file. Fortunately, the
+      // minidump format encodes enough information about each module's memory
+      // range to allow us to create placeholder modules.
+      //
+      // This enables most LLDB functionality involving address-to-module
+      // translations (ex. identifing the module for a stack frame PC) and
+      // modules/sections commands (ex. target modules list, ...)
+      LLDB_LOG(log,
+               "Unable to locate the matching object file, creating a "
+               "placeholder module for: {0}",
+               name);
+
+      module_sp = Module::CreateModuleFromObjectFile<PlaceholderObjectFile>(
+          module_spec, load_addr, load_size);
+      GetTarget().GetImages().Append(module_sp, true /* notify */);
+    }
+
+    bool load_addr_changed = false;
+    module_sp->SetLoadAddress(GetTarget(), load_addr, false,
+                              load_addr_changed);
+  }
+}
+
+bool ProcessMinidump::GetProcessInfo(ProcessInstanceInfo &info) {
+  info.Clear();
+  info.SetProcessID(GetID());
+  info.SetArchitecture(GetArchitecture());
+  lldb::ModuleSP module_sp = GetTarget().GetExecutableModule();
+  if (module_sp) {
+    const bool add_exe_file_as_first_arg = false;
+    info.SetExecutableFile(GetTarget().GetExecutableModule()->GetFileSpec(),
+                           add_exe_file_as_first_arg);
+  }
+  return true;
+}
+
+// For minidumps there's no runtime generated code so we don't need JITLoader(s)
+// Avoiding them will also speed up minidump loading since JITLoaders normally
+// try to set up symbolic breakpoints, which in turn may force loading more
+// debug information than needed.
+JITLoaderList &ProcessMinidump::GetJITLoaders() {
+  if (!m_jit_loaders_up) {
+    m_jit_loaders_up = std::make_unique<JITLoaderList>();
+  }
+  return *m_jit_loaders_up;
+}
+
+#define INIT_BOOL(VAR, LONG, SHORT, DESC) \
+    VAR(LLDB_OPT_SET_1, false, LONG, SHORT, DESC, false, true)
+#define APPEND_OPT(VAR) \
+    m_option_group.Append(&VAR, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1)
+
+class CommandObjectProcessMinidumpDump : public CommandObjectParsed {
+private:
+  OptionGroupOptions m_option_group;
+  OptionGroupBoolean m_dump_all;
+  OptionGroupBoolean m_dump_directory;
+  OptionGroupBoolean m_dump_linux_cpuinfo;
+  OptionGroupBoolean m_dump_linux_proc_status;
+  OptionGroupBoolean m_dump_linux_lsb_release;
+  OptionGroupBoolean m_dump_linux_cmdline;
+  OptionGroupBoolean m_dump_linux_environ;
+  OptionGroupBoolean m_dump_linux_auxv;
+  OptionGroupBoolean m_dump_linux_maps;
+  OptionGroupBoolean m_dump_linux_proc_stat;
+  OptionGroupBoolean m_dump_linux_proc_uptime;
+  OptionGroupBoolean m_dump_linux_proc_fd;
+  OptionGroupBoolean m_dump_linux_all;
+  OptionGroupBoolean m_fb_app_data;
+  OptionGroupBoolean m_fb_build_id;
+  OptionGroupBoolean m_fb_version;
+  OptionGroupBoolean m_fb_java_stack;
+  OptionGroupBoolean m_fb_dalvik;
+  OptionGroupBoolean m_fb_unwind;
+  OptionGroupBoolean m_fb_error_log;
+  OptionGroupBoolean m_fb_app_state;
+  OptionGroupBoolean m_fb_abort;
+  OptionGroupBoolean m_fb_thread;
+  OptionGroupBoolean m_fb_logcat;
+  OptionGroupBoolean m_fb_all;
+
+  void SetDefaultOptionsIfNoneAreSet() {
+    if (m_dump_all.GetOptionValue().GetCurrentValue() ||
+        m_dump_linux_all.GetOptionValue().GetCurrentValue() ||
+        m_fb_all.GetOptionValue().GetCurrentValue() ||
+        m_dump_directory.GetOptionValue().GetCurrentValue() ||
+        m_dump_linux_cpuinfo.GetOptionValue().GetCurrentValue() ||
+        m_dump_linux_proc_status.GetOptionValue().GetCurrentValue() ||
+        m_dump_linux_lsb_release.GetOptionValue().GetCurrentValue() ||
+        m_dump_linux_cmdline.GetOptionValue().GetCurrentValue() ||
+        m_dump_linux_environ.GetOptionValue().GetCurrentValue() ||
+        m_dump_linux_auxv.GetOptionValue().GetCurrentValue() ||
+        m_dump_linux_maps.GetOptionValue().GetCurrentValue() ||
+        m_dump_linux_proc_stat.GetOptionValue().GetCurrentValue() ||
+        m_dump_linux_proc_uptime.GetOptionValue().GetCurrentValue() ||
+        m_dump_linux_proc_fd.GetOptionValue().GetCurrentValue() ||
+        m_fb_app_data.GetOptionValue().GetCurrentValue() ||
+        m_fb_build_id.GetOptionValue().GetCurrentValue() ||
+        m_fb_version.GetOptionValue().GetCurrentValue() ||
+        m_fb_java_stack.GetOptionValue().GetCurrentValue() ||
+        m_fb_dalvik.GetOptionValue().GetCurrentValue() ||
+        m_fb_unwind.GetOptionValue().GetCurrentValue() ||
+        m_fb_error_log.GetOptionValue().GetCurrentValue() ||
+        m_fb_app_state.GetOptionValue().GetCurrentValue() ||
+        m_fb_abort.GetOptionValue().GetCurrentValue() ||
+        m_fb_thread.GetOptionValue().GetCurrentValue() ||
+        m_fb_logcat.GetOptionValue().GetCurrentValue())
+      return;
+    // If no options were set, then dump everything
+    m_dump_all.GetOptionValue().SetCurrentValue(true);
+  }
+  bool DumpAll() const {
+    return m_dump_all.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpDirectory() const {
+    return DumpAll() ||
+        m_dump_directory.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpLinux() const {
+    return DumpAll() || m_dump_linux_all.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpLinuxCPUInfo() const {
+    return DumpLinux() ||
+        m_dump_linux_cpuinfo.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpLinuxProcStatus() const {
+    return DumpLinux() ||
+        m_dump_linux_proc_status.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpLinuxProcStat() const {
+    return DumpLinux() ||
+        m_dump_linux_proc_stat.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpLinuxLSBRelease() const {
+    return DumpLinux() ||
+        m_dump_linux_lsb_release.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpLinuxCMDLine() const {
+    return DumpLinux() ||
+        m_dump_linux_cmdline.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpLinuxEnviron() const {
+    return DumpLinux() ||
+        m_dump_linux_environ.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpLinuxAuxv() const {
+    return DumpLinux() ||
+        m_dump_linux_auxv.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpLinuxMaps() const {
+    return DumpLinux() ||
+        m_dump_linux_maps.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpLinuxProcUptime() const {
+    return DumpLinux() ||
+        m_dump_linux_proc_uptime.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpLinuxProcFD() const {
+    return DumpLinux() ||
+        m_dump_linux_proc_fd.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebook() const {
+    return DumpAll() || m_fb_all.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebookAppData() const {
+    return DumpFacebook() || m_fb_app_data.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebookBuildID() const {
+    return DumpFacebook() || m_fb_build_id.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebookVersionName() const {
+    return DumpFacebook() || m_fb_version.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebookJavaStack() const {
+    return DumpFacebook() || m_fb_java_stack.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebookDalvikInfo() const {
+    return DumpFacebook() || m_fb_dalvik.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebookUnwindSymbols() const {
+    return DumpFacebook() || m_fb_unwind.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebookErrorLog() const {
+    return DumpFacebook() || m_fb_error_log.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebookAppStateLog() const {
+    return DumpFacebook() || m_fb_app_state.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebookAbortReason() const {
+    return DumpFacebook() || m_fb_abort.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebookThreadName() const {
+    return DumpFacebook() || m_fb_thread.GetOptionValue().GetCurrentValue();
+  }
+  bool DumpFacebookLogcat() const {
+    return DumpFacebook() || m_fb_logcat.GetOptionValue().GetCurrentValue();
+  }
+public:
+  CommandObjectProcessMinidumpDump(CommandInterpreter &interpreter)
+  : CommandObjectParsed(interpreter, "process plugin dump",
+      "Dump information from the minidump file.", nullptr),
+    m_option_group(),
+    INIT_BOOL(m_dump_all, "all", 'a',
+              "Dump the everything in the minidump."),
+    INIT_BOOL(m_dump_directory, "directory", 'd',
+              "Dump the minidump directory map."),
+    INIT_BOOL(m_dump_linux_cpuinfo, "cpuinfo", 'C',
+              "Dump linux /proc/cpuinfo."),
+    INIT_BOOL(m_dump_linux_proc_status, "status", 's',
+              "Dump linux /proc/<pid>/status."),
+    INIT_BOOL(m_dump_linux_lsb_release, "lsb-release", 'r',
+              "Dump linux /etc/lsb-release."),
+    INIT_BOOL(m_dump_linux_cmdline, "cmdline", 'c',
+              "Dump linux /proc/<pid>/cmdline."),
+    INIT_BOOL(m_dump_linux_environ, "environ", 'e',
+              "Dump linux /proc/<pid>/environ."),
+    INIT_BOOL(m_dump_linux_auxv, "auxv", 'x',
+              "Dump linux /proc/<pid>/auxv."),
+    INIT_BOOL(m_dump_linux_maps, "maps", 'm',
+              "Dump linux /proc/<pid>/maps."),
+    INIT_BOOL(m_dump_linux_proc_stat, "stat", 'S',
+              "Dump linux /proc/<pid>/stat."),
+    INIT_BOOL(m_dump_linux_proc_uptime, "uptime", 'u',
+              "Dump linux process uptime."),
+    INIT_BOOL(m_dump_linux_proc_fd, "fd", 'f',
+              "Dump linux /proc/<pid>/fd."),
+    INIT_BOOL(m_dump_linux_all, "linux", 'l',
+              "Dump all linux streams."),
+    INIT_BOOL(m_fb_app_data, "fb-app-data", 1,
+              "Dump Facebook application custom data."),
+    INIT_BOOL(m_fb_build_id, "fb-build-id", 2,
+              "Dump the Facebook build ID."),
+    INIT_BOOL(m_fb_version, "fb-version", 3,
+              "Dump Facebook application version string."),
+    INIT_BOOL(m_fb_java_stack, "fb-java-stack", 4,
+              "Dump Facebook java stack."),
+    INIT_BOOL(m_fb_dalvik, "fb-dalvik-info", 5,
+              "Dump Facebook Dalvik info."),
+    INIT_BOOL(m_fb_unwind, "fb-unwind-symbols", 6,
+              "Dump Facebook unwind symbols."),
+    INIT_BOOL(m_fb_error_log, "fb-error-log", 7,
+              "Dump Facebook error log."),
+    INIT_BOOL(m_fb_app_state, "fb-app-state-log", 8,
+              "Dump Facebook java stack."),
+    INIT_BOOL(m_fb_abort, "fb-abort-reason", 9,
+              "Dump Facebook abort reason."),
+    INIT_BOOL(m_fb_thread, "fb-thread-name", 10,
+              "Dump Facebook thread name."),
+    INIT_BOOL(m_fb_logcat, "fb-logcat", 11,
+              "Dump Facebook logcat."),
+    INIT_BOOL(m_fb_all, "facebook", 12, "Dump all Facebook streams.") {
+    APPEND_OPT(m_dump_all);
+    APPEND_OPT(m_dump_directory);
+    APPEND_OPT(m_dump_linux_cpuinfo);
+    APPEND_OPT(m_dump_linux_proc_status);
+    APPEND_OPT(m_dump_linux_lsb_release);
+    APPEND_OPT(m_dump_linux_cmdline);
+    APPEND_OPT(m_dump_linux_environ);
+    APPEND_OPT(m_dump_linux_auxv);
+    APPEND_OPT(m_dump_linux_maps);
+    APPEND_OPT(m_dump_linux_proc_stat);
+    APPEND_OPT(m_dump_linux_proc_uptime);
+    APPEND_OPT(m_dump_linux_proc_fd);
+    APPEND_OPT(m_dump_linux_all);
+    APPEND_OPT(m_fb_app_data);
+    APPEND_OPT(m_fb_build_id);
+    APPEND_OPT(m_fb_version);
+    APPEND_OPT(m_fb_java_stack);
+    APPEND_OPT(m_fb_dalvik);
+    APPEND_OPT(m_fb_unwind);
+    APPEND_OPT(m_fb_error_log);
+    APPEND_OPT(m_fb_app_state);
+    APPEND_OPT(m_fb_abort);
+    APPEND_OPT(m_fb_thread);
+    APPEND_OPT(m_fb_logcat);
+    APPEND_OPT(m_fb_all);
+    m_option_group.Finalize();
+  }
+
+  ~CommandObjectProcessMinidumpDump() override {}
+
+  Options *GetOptions() override { return &m_option_group; }
+
+  bool DoExecute(Args &command, CommandReturnObject &result) override {
+    const size_t argc = command.GetArgumentCount();
+    if (argc > 0) {
+      result.AppendErrorWithFormat("'%s' take no arguments, only options",
+                                   m_cmd_name.c_str());
+      result.SetStatus(eReturnStatusFailed);
+      return false;
+    }
+    SetDefaultOptionsIfNoneAreSet();
+
+    ProcessMinidump *process = static_cast<ProcessMinidump *>(
+        m_interpreter.GetExecutionContext().GetProcessPtr());
+    result.SetStatus(eReturnStatusSuccessFinishResult);
+    Stream &s = result.GetOutputStream();
+    MinidumpParser &minidump = *process->m_minidump_parser;
+    if (DumpDirectory()) {
+      s.Printf("RVA        SIZE       TYPE       StreamType\n");
+      s.Printf("---------- ---------- ---------- --------------------------\n");
+      for (const auto &stream_desc : minidump.GetMinidumpFile().streams())
+        s.Printf(
+            "0x%8.8x 0x%8.8x 0x%8.8x %s\n", (uint32_t)stream_desc.Location.RVA,
+            (uint32_t)stream_desc.Location.DataSize,
+            (unsigned)(StreamType)stream_desc.Type,
+            MinidumpParser::GetStreamTypeAsString(stream_desc.Type).data());
+      s.Printf("\n");
+    }
+    auto DumpTextStream = [&](StreamType stream_type,
+                              llvm::StringRef label) -> void {
+      auto bytes = minidump.GetStream(stream_type);
+      if (!bytes.empty()) {
+        if (label.empty())
+          label = MinidumpParser::GetStreamTypeAsString(stream_type);
+        s.Printf("%s:\n%s\n\n", label.data(), bytes.data());
+      }
+    };
+    auto DumpBinaryStream = [&](StreamType stream_type,
+                                llvm::StringRef label) -> void {
+      auto bytes = minidump.GetStream(stream_type);
+      if (!bytes.empty()) {
+        if (label.empty())
+          label = MinidumpParser::GetStreamTypeAsString(stream_type);
+        s.Printf("%s:\n", label.data());
+        DataExtractor data(bytes.data(), bytes.size(), eByteOrderLittle,
+                           process->GetAddressByteSize());
+        DumpDataExtractor(data, &s, 0, lldb::eFormatBytesWithASCII, 1,
+                          bytes.size(), 16, 0, 0, 0);
+        s.Printf("\n\n");
+      }
+    };
+
+    if (DumpLinuxCPUInfo())
+      DumpTextStream(StreamType::LinuxCPUInfo, "/proc/cpuinfo");
+    if (DumpLinuxProcStatus())
+      DumpTextStream(StreamType::LinuxProcStatus, "/proc/PID/status");
+    if (DumpLinuxLSBRelease())
+      DumpTextStream(StreamType::LinuxLSBRelease, "/etc/lsb-release");
+    if (DumpLinuxCMDLine())
+      DumpTextStream(StreamType::LinuxCMDLine, "/proc/PID/cmdline");
+    if (DumpLinuxEnviron())
+      DumpTextStream(StreamType::LinuxEnviron, "/proc/PID/environ");
+    if (DumpLinuxAuxv())
+      DumpBinaryStream(StreamType::LinuxAuxv, "/proc/PID/auxv");
+    if (DumpLinuxMaps())
+      DumpTextStream(StreamType::LinuxMaps, "/proc/PID/maps");
+    if (DumpLinuxProcStat())
+      DumpTextStream(StreamType::LinuxProcStat, "/proc/PID/stat");
+    if (DumpLinuxProcUptime())
+      DumpTextStream(StreamType::LinuxProcUptime, "uptime");
+    if (DumpLinuxProcFD())
+      DumpTextStream(StreamType::LinuxProcFD, "/proc/PID/fd");
+    if (DumpFacebookAppData())
+      DumpTextStream(StreamType::FacebookAppCustomData,
+                     "Facebook App Data");
+    if (DumpFacebookBuildID()) {
+      auto bytes = minidump.GetStream(StreamType::FacebookBuildID);
+      if (bytes.size() >= 4) {
+        DataExtractor data(bytes.data(), bytes.size(), eByteOrderLittle,
+                           process->GetAddressByteSize());
+        lldb::offset_t offset = 0;
+        uint32_t build_id = data.GetU32(&offset);
+        s.Printf("Facebook Build ID:\n");
+        s.Printf("%u\n", build_id);
+        s.Printf("\n");
+      }
+    }
+    if (DumpFacebookVersionName())
+      DumpTextStream(StreamType::FacebookAppVersionName,
+                     "Facebook Version String");
+    if (DumpFacebookJavaStack())
+      DumpTextStream(StreamType::FacebookJavaStack,
+                     "Facebook Java Stack");
+    if (DumpFacebookDalvikInfo())
+      DumpTextStream(StreamType::FacebookDalvikInfo,
+                     "Facebook Dalvik Info");
+    if (DumpFacebookUnwindSymbols())
+      DumpBinaryStream(StreamType::FacebookUnwindSymbols,
+                       "Facebook Unwind Symbols Bytes");
+    if (DumpFacebookErrorLog())
+      DumpTextStream(StreamType::FacebookDumpErrorLog,
+                     "Facebook Error Log");
+    if (DumpFacebookAppStateLog())
+      DumpTextStream(StreamType::FacebookAppStateLog,
+                     "Faceook Application State Log");
+    if (DumpFacebookAbortReason())
+      DumpTextStream(StreamType::FacebookAbortReason,
+                     "Facebook Abort Reason");
+    if (DumpFacebookThreadName())
+      DumpTextStream(StreamType::FacebookThreadName,
+                     "Facebook Thread Name");
+    if (DumpFacebookLogcat())
+      DumpTextStream(StreamType::FacebookLogcat,
+                     "Facebook Logcat");
+    return true;
+  }
+};
+
+class CommandObjectMultiwordProcessMinidump : public CommandObjectMultiword {
+public:
+  CommandObjectMultiwordProcessMinidump(CommandInterpreter &interpreter)
+    : CommandObjectMultiword(interpreter, "process plugin",
+          "Commands for operating on a ProcessMinidump process.",
+          "process plugin <subcommand> [<subcommand-options>]") {
+    LoadSubCommand("dump",
+        CommandObjectSP(new CommandObjectProcessMinidumpDump(interpreter)));
+  }
+
+  ~CommandObjectMultiwordProcessMinidump() override {}
+};
+
+CommandObject *ProcessMinidump::GetPluginCommandObject() {
+  if (!m_command_sp)
+    m_command_sp = std::make_shared<CommandObjectMultiwordProcessMinidump>(
+        GetTarget().GetDebugger().GetCommandInterpreter());
+  return m_command_sp.get();
+}