예제 #1
0
파일: Section.cpp 프로젝트: carlokok/lldb
int
Section::Compare (const Section& a, const Section& b)
{
    if (&a == &b)
        return 0;

    const ModuleSP a_module_sp = a.GetModule();
    const ModuleSP b_module_sp = b.GetModule();
    if (a_module_sp == b_module_sp)
    {
        user_id_t a_sect_uid = a.GetID();
        user_id_t b_sect_uid = b.GetID();
        if (a_sect_uid < b_sect_uid)
            return -1;
        if (a_sect_uid > b_sect_uid)
            return 1;
        return 0;
    }
    else
    {
        // The modules are different, just compare the module pointers
        if (a_module_sp.get() < b_module_sp.get())
            return -1;
        else
            return 1;   // We already know the modules aren't equal
    }
}
Error
PlatformDarwinKernel::GetSharedModule (const ModuleSpec &module_spec,
                                       ModuleSP &module_sp,
                                       const FileSpecList *module_search_paths_ptr,
                                       ModuleSP *old_module_sp_ptr,
                                       bool *did_create_ptr)
{
    Error error;
    module_sp.reset();
    const FileSpec &platform_file = module_spec.GetFileSpec();

    // Treat the file's path as a kext bundle ID (e.g. "com.apple.driver.AppleIRController") and search our kext index.
    std::string kext_bundle_id = platform_file.GetPath();
    if (!kext_bundle_id.empty())
    {
        ConstString kext_bundle_cs(kext_bundle_id.c_str());
        if (m_name_to_kext_path_map.count(kext_bundle_cs) > 0)
        {
            for (BundleIDToKextIterator it = m_name_to_kext_path_map.begin (); it != m_name_to_kext_path_map.end (); ++it)
            {
                if (it->first == kext_bundle_cs)
                {
                    error = ExamineKextForMatchingUUID (it->second, module_spec.GetUUID(), module_spec.GetArchitecture(), module_sp);
                    if (module_sp.get())
                    {
                        return error;
                    }
                }
            }
        }
    }

    // Else fall back to treating the file's path as an actual file path - defer to PlatformDarwin's GetSharedModule.
    return PlatformDarwin::GetSharedModule (module_spec, module_sp, module_search_paths_ptr, old_module_sp_ptr, did_create_ptr);
}
예제 #3
0
ModuleSP DynamicLoader::GetTargetExecutable() {
  Target &target = m_process->GetTarget();
  ModuleSP executable = target.GetExecutableModule();

  if (executable) {
    if (FileSystem::Instance().Exists(executable->GetFileSpec())) {
      ModuleSpec module_spec(executable->GetFileSpec(),
                             executable->GetArchitecture());
      auto module_sp = std::make_shared<Module>(module_spec);

      // Check if the executable has changed and set it to the target
      // executable if they differ.
      if (module_sp && module_sp->GetUUID().IsValid() &&
          executable->GetUUID().IsValid()) {
        if (module_sp->GetUUID() != executable->GetUUID())
          executable.reset();
      } else if (executable->FileHasChanged()) {
        executable.reset();
      }

      if (!executable) {
        executable = target.GetOrCreateModule(module_spec, true /* notify */);
        if (executable.get() != target.GetExecutableModulePointer()) {
          // Don't load dependent images since we are in dyld where we will
          // know and find out about all images that are loaded
          target.SetExecutableModule(executable, eLoadDependentsNo);
        }
      }
    }
  }
  return executable;
}
void
DynamicLoaderPOSIXDYLD::DidLaunch()
{
    Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
    if (log)
        log->Printf ("DynamicLoaderPOSIXDYLD::%s()", __FUNCTION__);

    ModuleSP executable;
    addr_t load_offset;

    m_auxv.reset(new AuxVector(m_process));

    executable = GetTargetExecutable();
    load_offset = ComputeLoadOffset();

    if (executable.get() && load_offset != LLDB_INVALID_ADDRESS)
    {
        ModuleList module_list;
        module_list.Append(executable);
        UpdateLoadedSections(executable, LLDB_INVALID_ADDRESS, load_offset);

        if (log)
            log->Printf ("DynamicLoaderPOSIXDYLD::%s about to call ProbeEntry()", __FUNCTION__);
        ProbeEntry();

        m_process->GetTarget().ModulesDidLoad(module_list);
    }
}
예제 #5
0
// Find the load address of a symbol
static lldb::addr_t findSymbolAddress( Process *proc, ConstString findName )
{
    assert( proc != nullptr );

    ModuleSP module = proc->GetTarget().GetExecutableModule();
    assert( module.get() != nullptr );

    ObjectFile *exe = module->GetObjectFile();
    assert( exe != nullptr );

    lldb_private::Symtab *symtab = exe->GetSymtab( );
    assert( symtab != nullptr );

    for ( size_t i = 0; i < symtab->GetNumSymbols( ); i++ )
    {
        const Symbol* sym = symtab->SymbolAtIndex( i );
        assert( sym != nullptr );
        const ConstString &symName = sym->GetName( );

        if ( ConstString::Compare( findName, symName ) == 0 )
        {
            Address addr = sym->GetAddress();
            return addr.GetLoadAddress( & proc->GetTarget() );
        }
    }
    return LLDB_INVALID_ADDRESS;
}
예제 #6
0
Error
PlatformDarwinKernel::GetSharedModule (const ModuleSpec &module_spec,
                                       Process *process,
                                       ModuleSP &module_sp,
                                       const FileSpecList *module_search_paths_ptr,
                                       ModuleSP *old_module_sp_ptr,
                                       bool *did_create_ptr)
{
    Error error;
    module_sp.reset();
    const FileSpec &platform_file = module_spec.GetFileSpec();

    // Treat the file's path as a kext bundle ID (e.g. "com.apple.driver.AppleIRController") and search our kext index.
    std::string kext_bundle_id = platform_file.GetPath();
    if (!kext_bundle_id.empty())
    {
        ConstString kext_bundle_cs(kext_bundle_id.c_str());
        if (m_name_to_kext_path_map.count(kext_bundle_cs) > 0)
        {
            for (BundleIDToKextIterator it = m_name_to_kext_path_map.begin (); it != m_name_to_kext_path_map.end (); ++it)
            {
                if (it->first == kext_bundle_cs)
                {
                    error = ExamineKextForMatchingUUID (it->second, module_spec.GetUUID(), module_spec.GetArchitecture(), module_sp);
                    if (module_sp.get())
                    {
                        return error;
                    }
                }
            }
        }
    }

    if (kext_bundle_id.compare("mach_kernel") == 0 && module_spec.GetUUID().IsValid())
    {
        for (auto possible_kernel : m_kernel_binaries)
        {
            if (possible_kernel.Exists())
            {
                ModuleSpec kern_spec (possible_kernel);
                kern_spec.GetUUID() = module_spec.GetUUID();
                ModuleSP module_sp (new Module (kern_spec));
                if (module_sp && module_sp->GetObjectFile() && module_sp->MatchesModuleSpec (kern_spec))
                {
                    Error error;
                    error = ModuleList::GetSharedModule (kern_spec, module_sp, NULL, NULL, NULL);
                    if (module_sp && module_sp->GetObjectFile())
                    {
                        return error;
                    }
                }
            }
        }
    }

    // Else fall back to treating the file's path as an actual file path - defer to PlatformDarwin's GetSharedModule.
    return PlatformDarwin::GetSharedModule (module_spec, process, module_sp, module_search_paths_ptr, old_module_sp_ptr, did_create_ptr);
}
예제 #7
0
/// Checks to see if the target module has changed, updates the target
/// accordingly and returns the target executable module.
ModuleSP
DynamicLoaderHexagonDYLD::GetTargetExecutable()
{
    Target &target = m_process->GetTarget();
    ModuleSP executable = target.GetExecutableModule();

    // There is no executable
    if (! executable.get())
        return executable;

    // The target executable file does not exits
    if (! executable->GetFileSpec().Exists())
        return executable;
    
    // Prep module for loading
    ModuleSpec module_spec(executable->GetFileSpec(), executable->GetArchitecture());
    ModuleSP   module_sp  (new Module (module_spec));

    // Check if the executable has changed and set it to the target executable if they differ.
    if (module_sp.get() && module_sp->GetUUID().IsValid() && executable->GetUUID().IsValid())
    {
        // if the executable has changed ??
        if (module_sp->GetUUID() != executable->GetUUID())
            executable.reset();
    }
    else if (executable->FileHasChanged())
        executable.reset();

    if ( executable.get( ) )
        return executable;

    // TODO: What case is this code used?
    executable = target.GetSharedModule(module_spec);
    if (executable.get() != target.GetExecutableModulePointer())
    {
        // Don't load dependent images since we are in dyld where we will know
        // and find out about all images that are loaded
        const bool get_dependent_images = false;
        target.SetExecutableModule(executable, get_dependent_images);
    }
    
    return executable;
}
예제 #8
0
void
DynamicLoaderHexagonDYLD::DidAttach()
{
    ModuleSP executable;
    addr_t load_offset;

    executable = GetTargetExecutable();

    // Find the difference between the desired load address in the elf file
    // and the real load address in memory
    load_offset = ComputeLoadOffset();

    // Check that there is a valid executable
    if ( executable.get( ) == nullptr )
        return;
        
    // Disable JIT for hexagon targets because its not supported
    m_process->SetCanJIT(false);

    // Enable Interpreting of function call expressions
    m_process->SetCanInterpretFunctionCalls(true);

    // Add the current executable to the module list
    ModuleList module_list;
    module_list.Append(executable);

    // Map the loaded sections of this executable
    if ( load_offset != LLDB_INVALID_ADDRESS )
        UpdateLoadedSections(executable, LLDB_INVALID_ADDRESS, load_offset, true);

    // AD: confirm this?
    // Load into LLDB all of the currently loaded executables in the stub
    LoadAllCurrentModules();

    // AD: confirm this?
    // Callback for the target to give it the loaded module list
    m_process->GetTarget().ModulesDidLoad(module_list);

    // Try to set a breakpoint at the rendezvous breakpoint.
    // DidLaunch uses ProbeEntry() instead.  That sets a breakpoint,
    // at the dyld breakpoint address, with a callback so that when hit,
    // the dyld structure can be parsed.
    if (! SetRendezvousBreakpoint() )
    {
        // fail
    }
}
예제 #9
0
bool
ModuleList::AppendIfNeeded (const ModuleSP &module_sp)
{
    if (module_sp)
    {
        Mutex::Locker locker(m_modules_mutex);
        collection::iterator pos, end = m_modules.end();
        for (pos = m_modules.begin(); pos != end; ++pos)
        {
            if (pos->get() == module_sp.get())
                return false; // Already in the list
        }
        // Only push module_sp on the list if it wasn't already in there.
        Append(module_sp);
        return true;
    }
    return false;
}
예제 #10
0
bool
ModuleList::Remove (const ModuleSP &module_sp)
{
    if (module_sp)
    {
        Mutex::Locker locker(m_modules_mutex);
        collection::iterator pos, end = m_modules.end();
        for (pos = m_modules.begin(); pos != end; ++pos)
        {
            if (pos->get() == module_sp.get())
            {
                m_modules.erase (pos);
                return true;
            }
        }
    }
    return false;
}
예제 #11
0
void
DynamicLoaderPOSIXDYLD::DidLaunch()
{
    ModuleSP executable;
    addr_t load_offset;

    m_auxv.reset(new AuxVector(m_process));

    executable = GetTargetExecutable();
    load_offset = ComputeLoadOffset();

    if (executable.get() && load_offset != LLDB_INVALID_ADDRESS)
    {
        ModuleList module_list;
        module_list.Append(executable);
        UpdateLoadedSections(executable, load_offset);
        ProbeEntry();
        m_process->GetTarget().ModulesDidLoad(module_list);
    }
}
예제 #12
0
bool
ModuleList::RemoveImpl (const ModuleSP &module_sp, bool use_notifier)
{
    if (module_sp)
    {
        Mutex::Locker locker(m_modules_mutex);
        collection::iterator pos, end = m_modules.end();
        for (pos = m_modules.begin(); pos != end; ++pos)
        {
            if (pos->get() == module_sp.get())
            {
                m_modules.erase (pos);
                if (use_notifier && m_notifier)
                    m_notifier->ModuleRemoved(*this, module_sp);
                return true;
            }
        }
    }
    return false;
}
예제 #13
0
static void 
ModuleSharedPtrLogger(void* p, const ModuleSP& sp, bool will_decrement)
{
    if (sp.get())
    {
        const char *module_basename = sp->GetFileSpec().GetFilename().GetCString();
        // If "p" is set, then it is the basename of a module to watch for. This
        // basename MUST be uniqued first by getting it from a ConstString or this
        // won't work.
        if (p && p != module_basename)
        {
            return;
        }
        long use_count = sp.use_count();
        if (will_decrement)
            --use_count;

        printf("\nModuleSP(%p): %c %p {%lu} %s/%s\n", &sp, will_decrement ? '-' : '+', sp.get(), use_count, sp->GetFileSpec().GetDirectory().GetCString(), module_basename);
        StreamFile stdout_strm(stdout, false);
        Host::Backtrace (stdout_strm, 512);
    }
}
예제 #14
0
Error
ModuleList::GetSharedModule(const ModuleSpec &module_spec,
                            ModuleSP &module_sp,
                            const FileSpecList *module_search_paths_ptr,
                            ModuleSP *old_module_sp_ptr,
                            bool *did_create_ptr,
                            bool always_create)
{
    ModuleList &shared_module_list = GetSharedModuleList ();
    Mutex::Locker locker(shared_module_list.m_modules_mutex);
    char path[PATH_MAX];

    Error error;

    module_sp.reset();

    if (did_create_ptr)
        *did_create_ptr = false;
    if (old_module_sp_ptr)
        old_module_sp_ptr->reset();

    const UUID *uuid_ptr = module_spec.GetUUIDPtr();
    const FileSpec &module_file_spec = module_spec.GetFileSpec();
    const ArchSpec &arch = module_spec.GetArchitecture();

    // Make sure no one else can try and get or create a module while this
    // function is actively working on it by doing an extra lock on the
    // global mutex list.
    if (!always_create)
    {
        ModuleList matching_module_list;
        const size_t num_matching_modules = shared_module_list.FindModules (module_spec, matching_module_list);
        if (num_matching_modules > 0)
        {
            for (size_t module_idx = 0; module_idx < num_matching_modules; ++module_idx)
            {
                module_sp = matching_module_list.GetModuleAtIndex(module_idx);

                // Make sure the file for the module hasn't been modified
                if (module_sp->FileHasChanged())
                {
                    if (old_module_sp_ptr && !*old_module_sp_ptr)
                        *old_module_sp_ptr = module_sp;

                    Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_MODULES));
                    if (log != nullptr)
                        log->Printf("module changed: %p, removing from global module list",
                                    static_cast<void*>(module_sp.get()));

                    shared_module_list.Remove (module_sp);
                    module_sp.reset();
                }
                else
                {
                    // The module matches and the module was not modified from
                    // when it was last loaded.
                    return error;
                }
            }
        }
    }

    if (module_sp)
        return error;

    module_sp.reset (new Module (module_spec));
    // Make sure there are a module and an object file since we can specify
    // a valid file path with an architecture that might not be in that file.
    // By getting the object file we can guarantee that the architecture matches
    if (module_sp->GetObjectFile())
    {
        // If we get in here we got the correct arch, now we just need
        // to verify the UUID if one was given
        if (uuid_ptr && *uuid_ptr != module_sp->GetUUID())
        {
            module_sp.reset();
        }
        else
        {
            if (module_sp->GetObjectFile() && module_sp->GetObjectFile()->GetType() == ObjectFile::eTypeStubLibrary)
            {
                module_sp.reset();
            }
            else
            {
                if (did_create_ptr)
                {
                    *did_create_ptr = true;
                }

                shared_module_list.ReplaceEquivalent(module_sp);
                return error;
            }
        }
    }
    else
    {
        module_sp.reset();
    }

    if (module_search_paths_ptr)
    {
        const auto num_directories = module_search_paths_ptr->GetSize();
        for (size_t idx = 0; idx < num_directories; ++idx)
        {
            auto search_path_spec = module_search_paths_ptr->GetFileSpecAtIndex(idx);
            if (!search_path_spec.ResolvePath())
                continue;
            if (!search_path_spec.Exists() || !search_path_spec.IsDirectory())
                continue;
            search_path_spec.AppendPathComponent(module_spec.GetFileSpec().GetFilename().AsCString());
            if (!search_path_spec.Exists())
                continue;

            auto resolved_module_spec(module_spec);
            resolved_module_spec.GetFileSpec() = search_path_spec;
            module_sp.reset (new Module (resolved_module_spec));
            if (module_sp->GetObjectFile())
            {
                // If we get in here we got the correct arch, now we just need
                // to verify the UUID if one was given
                if (uuid_ptr && *uuid_ptr != module_sp->GetUUID())
                {
                    module_sp.reset();
                }
                else
                {
                    if (module_sp->GetObjectFile()->GetType() == ObjectFile::eTypeStubLibrary)
                    {
                        module_sp.reset();
                    }
                    else
                    {
                        if (did_create_ptr)
                            *did_create_ptr = true;
    
                        shared_module_list.ReplaceEquivalent(module_sp);
                        return Error();
                    }
                }
            }
            else
            {
                module_sp.reset();
            }
        }
    }

    // Either the file didn't exist where at the path, or no path was given, so
    // we now have to use more extreme measures to try and find the appropriate
    // module.

    // Fixup the incoming path in case the path points to a valid file, yet
    // the arch or UUID (if one was passed in) don't match.
    ModuleSpec located_binary_modulespec = Symbols::LocateExecutableObjectFile (module_spec);

    // Don't look for the file if it appears to be the same one we already
    // checked for above...
    if (located_binary_modulespec.GetFileSpec() != module_file_spec)
    {
        if (!located_binary_modulespec.GetFileSpec().Exists())
        {
            located_binary_modulespec.GetFileSpec().GetPath(path, sizeof(path));
            if (path[0] == '\0')
                module_file_spec.GetPath(path, sizeof(path));
            // How can this check ever be true? This branch it is false, and we haven't modified file_spec.
            if (located_binary_modulespec.GetFileSpec().Exists())
            {
                std::string uuid_str;
                if (uuid_ptr && uuid_ptr->IsValid())
                    uuid_str = uuid_ptr->GetAsString();

                if (arch.IsValid())
                {
                    if (!uuid_str.empty())
                        error.SetErrorStringWithFormat("'%s' does not contain the %s architecture and UUID %s", path, arch.GetArchitectureName(), uuid_str.c_str());
                    else
                        error.SetErrorStringWithFormat("'%s' does not contain the %s architecture.", path, arch.GetArchitectureName());
                }
            }
            else
            {
                error.SetErrorStringWithFormat("'%s' does not exist", path);
            }
            if (error.Fail())
                module_sp.reset();
            return error;
        }

        // Make sure no one else can try and get or create a module while this
        // function is actively working on it by doing an extra lock on the
        // global mutex list.
        ModuleSpec platform_module_spec(module_spec);
        platform_module_spec.GetFileSpec() = located_binary_modulespec.GetFileSpec();
        platform_module_spec.GetPlatformFileSpec() = located_binary_modulespec.GetFileSpec();
        platform_module_spec.GetSymbolFileSpec() = located_binary_modulespec.GetSymbolFileSpec();
        ModuleList matching_module_list;
        if (shared_module_list.FindModules (platform_module_spec, matching_module_list) > 0)
        {
            module_sp = matching_module_list.GetModuleAtIndex(0);

            // If we didn't have a UUID in mind when looking for the object file,
            // then we should make sure the modification time hasn't changed!
            if (platform_module_spec.GetUUIDPtr() == nullptr)
            {
                TimeValue file_spec_mod_time(located_binary_modulespec.GetFileSpec().GetModificationTime());
                if (file_spec_mod_time.IsValid())
                {
                    if (file_spec_mod_time != module_sp->GetModificationTime())
                    {
                        if (old_module_sp_ptr)
                            *old_module_sp_ptr = module_sp;
                        shared_module_list.Remove (module_sp);
                        module_sp.reset();
                    }
                }
            }
        }

        if (!module_sp)
        {
            module_sp.reset (new Module (platform_module_spec));
            // Make sure there are a module and an object file since we can specify
            // a valid file path with an architecture that might not be in that file.
            // By getting the object file we can guarantee that the architecture matches
            if (module_sp && module_sp->GetObjectFile())
            {
                if (module_sp->GetObjectFile()->GetType() == ObjectFile::eTypeStubLibrary)
                {
                    module_sp.reset();
                }
                else
                {
                    if (did_create_ptr)
                        *did_create_ptr = true;

                    shared_module_list.ReplaceEquivalent(module_sp);
                }
            }
            else
            {
                located_binary_modulespec.GetFileSpec().GetPath(path, sizeof(path));

                if (located_binary_modulespec.GetFileSpec())
                {
                    if (arch.IsValid())
                        error.SetErrorStringWithFormat("unable to open %s architecture in '%s'", arch.GetArchitectureName(), path);
                    else
                        error.SetErrorStringWithFormat("unable to open '%s'", path);
                }
                else
                {
                    std::string uuid_str;
                    if (uuid_ptr && uuid_ptr->IsValid())
                        uuid_str = uuid_ptr->GetAsString();

                    if (!uuid_str.empty())
                        error.SetErrorStringWithFormat("cannot locate a module for UUID '%s'", uuid_str.c_str());
                    else
                        error.SetErrorStringWithFormat("cannot locate a module");
                }
            }
        }
    }

    return error;
}
예제 #15
0
파일: Target.cpp 프로젝트: eightcien/lldb
void
Target::SetExecutableModule (ModuleSP& executable_sp, bool get_dependent_files)
{
    m_images.Clear();
    m_scratch_ast_context_ap.reset();

    if (executable_sp.get())
    {
        Timer scoped_timer (__PRETTY_FUNCTION__,
                            "Target::SetExecutableModule (executable = '%s/%s')",
                            executable_sp->GetFileSpec().GetDirectory().AsCString(),
                            executable_sp->GetFileSpec().GetFilename().AsCString());

        m_images.Append(executable_sp); // The first image is our exectuable file

        ArchSpec exe_arch = executable_sp->GetArchitecture();
        // If we haven't set an architecture yet, reset our architecture based on what we found in the executable module.
        if (!m_arch_spec.IsValid())
            m_arch_spec = exe_arch;

        FileSpecList dependent_files;
        ObjectFile * executable_objfile = executable_sp->GetObjectFile();
        if (executable_objfile == NULL)
        {

            FileSpec bundle_executable(executable_sp->GetFileSpec());
            if (Host::ResolveExecutableInBundle (bundle_executable))
            {
                ModuleSP bundle_exe_module_sp(GetSharedModule(bundle_executable,
                                              exe_arch));
                SetExecutableModule (bundle_exe_module_sp, get_dependent_files);
                if (bundle_exe_module_sp->GetObjectFile() != NULL)
                    executable_sp = bundle_exe_module_sp;
                return;
            }
        }

        if (executable_objfile)
        {
            executable_objfile->GetDependentModules(dependent_files);
            for (uint32_t i=0; i<dependent_files.GetSize(); i++)
            {
                ModuleSP image_module_sp(GetSharedModule(dependent_files.GetFileSpecPointerAtIndex(i),
                                         exe_arch));
                if (image_module_sp.get())
                {
                    //image_module_sp->Dump(&s);// REMOVE THIS, DEBUG ONLY
                    ObjectFile *objfile = image_module_sp->GetObjectFile();
                    if (objfile)
                        objfile->GetDependentModules(dependent_files);
                }
            }
        }

        // Now see if we know the target triple, and if so, create our scratch AST context:
        if (m_arch_spec.IsValid())
        {
            m_scratch_ast_context_ap.reset (new ClangASTContext(m_arch_spec.GetTriple().str().c_str()));
        }
    }

    UpdateInstanceName();
}
예제 #16
0
Error
ModuleList::GetSharedModule
(
    const FileSpec& in_file_spec,
    const ArchSpec& arch,
    const lldb_private::UUID *uuid_ptr,
    const ConstString *object_name_ptr,
    off_t object_offset,
    ModuleSP &module_sp,
    ModuleSP *old_module_sp_ptr,
    bool *did_create_ptr,
    bool always_create
)
{
    ModuleList &shared_module_list = GetSharedModuleList ();
    Mutex::Locker locker(shared_module_list.m_modules_mutex);
    char path[PATH_MAX];
    char uuid_cstr[64];

    Error error;

    module_sp.reset();

    if (did_create_ptr)
        *did_create_ptr = false;
    if (old_module_sp_ptr)
        old_module_sp_ptr->reset();


    // First just try and get the file where it purports to be (path in
    // in_file_spec), then check and uuid.

    if (in_file_spec)
    {
        // Make sure no one else can try and get or create a module while this
        // function is actively working on it by doing an extra lock on the
        // global mutex list.
        if (always_create == false)
        {
            ModuleList matching_module_list;
            const size_t num_matching_modules = shared_module_list.FindModules (&in_file_spec, &arch, NULL, object_name_ptr, matching_module_list);
            if (num_matching_modules > 0)
            {
                for (uint32_t module_idx = 0; module_idx < num_matching_modules; ++module_idx)
                {
                    module_sp = matching_module_list.GetModuleAtIndex(module_idx);
                    if (uuid_ptr && uuid_ptr->IsValid())
                    {
                        // We found the module we were looking for.
                        if (module_sp->GetUUID() == *uuid_ptr)
                            return error;
                    }
                    else
                    {
                        // If we didn't have a UUID in mind when looking for the object file,
                        // then we should make sure the modification time hasn't changed!
                        TimeValue file_spec_mod_time(in_file_spec.GetModificationTime());
                        if (file_spec_mod_time.IsValid())
                        {
                            if (file_spec_mod_time == module_sp->GetModificationTime())
                                return error;
                        }
                    }
                    if (old_module_sp_ptr && !old_module_sp_ptr->get())
                        *old_module_sp_ptr = module_sp;
                    shared_module_list.Remove (module_sp);
                    module_sp.reset();
                }
            }
        }

        if (module_sp)
            return error;
        else
        {
#if defined ENABLE_MODULE_SP_LOGGING
            ModuleSP logging_module_sp (new Module (in_file_spec, arch, object_name_ptr, object_offset), ModuleSharedPtrLogger, (void *)ConstString("a.out").GetCString());
            module_sp = logging_module_sp;
#else
            module_sp.reset (new Module (in_file_spec, arch, object_name_ptr, object_offset));
#endif
            // Make sure there are a module and an object file since we can specify
            // a valid file path with an architecture that might not be in that file.
            // By getting the object file we can guarantee that the architecture matches
            if (module_sp && module_sp->GetObjectFile())
            {
                // If we get in here we got the correct arch, now we just need
                // to verify the UUID if one was given
                if (uuid_ptr && *uuid_ptr != module_sp->GetUUID())
                    module_sp.reset();
                else
                {
                    if (did_create_ptr)
                        *did_create_ptr = true;
                    
                    shared_module_list.Append(module_sp);
                    return error;
                }
            }
        }
    }

    // Either the file didn't exist where at the path, or no path was given, so
    // we now have to use more extreme measures to try and find the appropriate
    // module.

    // Fixup the incoming path in case the path points to a valid file, yet
    // the arch or UUID (if one was passed in) don't match.
    FileSpec file_spec = Symbols::LocateExecutableObjectFile (in_file_spec ? &in_file_spec : NULL, 
                                                              arch.IsValid() ? &arch : NULL, 
                                                              uuid_ptr);

    // Don't look for the file if it appears to be the same one we already
    // checked for above...
    if (file_spec != in_file_spec)
    {
        if (!file_spec.Exists())
        {
            file_spec.GetPath(path, sizeof(path));
            if (file_spec.Exists())
            {
                if (uuid_ptr && uuid_ptr->IsValid())
                    uuid_ptr->GetAsCString(uuid_cstr, sizeof (uuid_cstr));
                else
                    uuid_cstr[0] = '\0';


                if (arch.IsValid())
                {
                    if (uuid_cstr[0])
                        error.SetErrorStringWithFormat("'%s' does not contain the %s architecture and UUID %s", path, arch.GetArchitectureName(), uuid_cstr);
                    else
                        error.SetErrorStringWithFormat("'%s' does not contain the %s architecture.", path, arch.GetArchitectureName());
                }
            }
            else
            {
                error.SetErrorStringWithFormat("'%s' does not exist", path);
            }
            return error;
        }


        // Make sure no one else can try and get or create a module while this
        // function is actively working on it by doing an extra lock on the
        // global mutex list.
        ModuleList matching_module_list;
        if (shared_module_list.FindModules (&file_spec, &arch, uuid_ptr, object_name_ptr, matching_module_list) > 0)
        {
            module_sp = matching_module_list.GetModuleAtIndex(0);

            // If we didn't have a UUID in mind when looking for the object file,
            // then we should make sure the modification time hasn't changed!
            if (uuid_ptr == NULL)
            {
                TimeValue file_spec_mod_time(file_spec.GetModificationTime());
                if (file_spec_mod_time.IsValid())
                {
                    if (file_spec_mod_time != module_sp->GetModificationTime())
                    {
                        if (old_module_sp_ptr)
                            *old_module_sp_ptr = module_sp;
                        shared_module_list.Remove (module_sp);
                        module_sp.reset();
                    }
                }
            }
        }

        if (module_sp.get() == NULL)
        {
#if defined ENABLE_MODULE_SP_LOGGING
            ModuleSP logging_module_sp (new Module (file_spec, arch, object_name_ptr, object_offset), ModuleSharedPtrLogger, 0);
            module_sp = logging_module_sp;
#else
            module_sp.reset (new Module (file_spec, arch, object_name_ptr, object_offset));
#endif
            // Make sure there are a module and an object file since we can specify
            // a valid file path with an architecture that might not be in that file.
            // By getting the object file we can guarantee that the architecture matches
            if (module_sp && module_sp->GetObjectFile())
            {
                if (did_create_ptr)
                    *did_create_ptr = true;

                shared_module_list.Append(module_sp);
            }
            else
            {
                file_spec.GetPath(path, sizeof(path));

                if (file_spec)
                {
                    if (arch.IsValid())
                        error.SetErrorStringWithFormat("unable to open %s architecture in '%s'", arch.GetArchitectureName(), path);
                    else
                        error.SetErrorStringWithFormat("unable to open '%s'", path);
                }
                else
                {
                    if (uuid_ptr && uuid_ptr->IsValid())
                        uuid_ptr->GetAsCString(uuid_cstr, sizeof (uuid_cstr));
                    else
                        uuid_cstr[0] = '\0';

                    if (uuid_cstr[0])
                        error.SetErrorStringWithFormat("cannot locate a module for UUID '%s'", uuid_cstr);
                    else
                        error.SetErrorStringWithFormat("cannot locate a module");
                }
            }
        }
    }

    return error;
}