C++ Error::Fail方法代码示例

//.........这里部分代码省略.........
        }

        if (!resolved_module_spec.GetFileSpec().Exists())
            resolved_module_spec.GetFileSpec().ResolveExecutableLocation ();

        if (resolved_module_spec.GetFileSpec().Exists())
            error.Clear();
        else
        {
            error.SetErrorStringWithFormat("unable to find executable for '%s'", resolved_module_spec.GetFileSpec().GetPath().c_str());
        }
    }
    else
    {
        if (m_remote_platform_sp)
        {
            error = GetCachedExecutable (resolved_module_spec, exe_module_sp, module_search_paths_ptr, *m_remote_platform_sp);
        }
        else
        {
            // We may connect to a process and use the provided executable (Don't use local $PATH).

            // Resolve any executable within a bundle on MacOSX
            Host::ResolveExecutableInBundle (resolved_module_spec.GetFileSpec());

            if (resolved_module_spec.GetFileSpec().Exists())
            {
                error.Clear();
            }
            else
            {
                error.SetErrorStringWithFormat("the platform is not currently connected, and '%s' doesn't exist in the system root.", resolved_module_spec.GetFileSpec().GetPath().c_str());
            }
        }
    }

    if (error.Success())
    {
        if (resolved_module_spec.GetArchitecture().IsValid())
        {
            error = ModuleList::GetSharedModule (resolved_module_spec,
                                                 exe_module_sp,
                                                 module_search_paths_ptr,
                                                 NULL,
                                                 NULL);

            if (!exe_module_sp || exe_module_sp->GetObjectFile() == NULL)
            {
                exe_module_sp.reset();
                error.SetErrorStringWithFormat ("'%s' doesn't contain the architecture %s",
                                                resolved_module_spec.GetFileSpec().GetPath().c_str(),
                                                resolved_module_spec.GetArchitecture().GetArchitectureName());
            }
        }
        else
        {
            // No valid architecture was specified, ask the platform for
            // the architectures that we should be using (in the correct order)
            // and see if we can find a match that way
            StreamString arch_names;
            for (uint32_t idx = 0; GetSupportedArchitectureAtIndex (idx, resolved_module_spec.GetArchitecture()); ++idx)
            {
                error = ModuleList::GetSharedModule (resolved_module_spec,
                                                     exe_module_sp,
                                                     module_search_paths_ptr,
                                                     NULL,
                                                     NULL);
                // Did we find an executable using one of the
                if (error.Success())
                {
                    if (exe_module_sp && exe_module_sp->GetObjectFile())
                        break;
                    else
                        error.SetErrorToGenericError();
                }

                if (idx > 0)
                    arch_names.PutCString (", ");
                arch_names.PutCString (resolved_module_spec.GetArchitecture().GetArchitectureName());
            }

            if (error.Fail() || !exe_module_sp)
            {
                if (resolved_module_spec.GetFileSpec().Readable())
                {
                    error.SetErrorStringWithFormat ("'%s' doesn't contain any '%s' platform architectures: %s",
                                                    resolved_module_spec.GetFileSpec().GetPath().c_str(),
                                                    GetPluginName().GetCString(),
                                                    arch_names.GetString().c_str());
                }
                else
                {
                    error.SetErrorStringWithFormat("'%s' is not readable", resolved_module_spec.GetFileSpec().GetPath().c_str());
                }
            }
        }
    }

    return error;
}

Error
SoftwareBreakpoint::EnableSoftwareBreakpoint (NativeProcessProtocol &process, lldb::addr_t addr, size_t bp_opcode_size, const uint8_t *bp_opcode_bytes, uint8_t *saved_opcode_bytes)
{
    assert (bp_opcode_size <= MAX_TRAP_OPCODE_SIZE && "bp_opcode_size out of valid range");
    assert (bp_opcode_bytes && "bp_opcode_bytes is NULL");
    assert (saved_opcode_bytes && "saved_opcode_bytes is NULL");

    Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS));
    if (log)
        log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64, __FUNCTION__, addr);

    // Save the original opcodes by reading them so we can restore later.
    size_t bytes_read = 0;

    Error error = process.ReadMemory(addr, saved_opcode_bytes, bp_opcode_size, bytes_read);
    if (error.Fail ())
    {
        if (log)
            log->Printf ("SoftwareBreakpoint::%s failed to read memory while attempting to set breakpoint: %s", __FUNCTION__, error.AsCString ());
        return error;
    }

    // Ensure we read as many bytes as we expected.
    if (bytes_read != bp_opcode_size)
    {
        if (log)
            log->Printf ("SoftwareBreakpoint::%s failed to read memory while attempting to set breakpoint: attempted to read %lu bytes but only read %" PRIu64, __FUNCTION__, bp_opcode_size, (uint64_t)bytes_read);
        return Error ("SoftwareBreakpoint::%s failed to read memory while attempting to set breakpoint: attempted to read %lu bytes but only read %" PRIu64, __FUNCTION__, bp_opcode_size, (uint64_t)bytes_read);
    }

    // Log what we read.
    if (log)
    {
        int i = 0;
        for (const uint8_t *read_byte = saved_opcode_bytes; read_byte < saved_opcode_bytes + bp_opcode_size; ++read_byte)
        {
            log->Printf("SoftwareBreakpoint::%s addr = 0x%" PRIx64
                    " ovewriting byte index %d (was 0x%hhx)",
                    __FUNCTION__, addr, i++, *read_byte);
        }
    }

    // Write a software breakpoint in place of the original opcode.
    size_t bytes_written = 0;
    error = process.WriteMemory(addr, bp_opcode_bytes, bp_opcode_size, bytes_written);
    if (error.Fail ())
    {
        if (log)
            log->Printf ("SoftwareBreakpoint::%s failed to write memory while attempting to set breakpoint: %s", __FUNCTION__, error.AsCString ());
        return error;
    }

    // Ensure we wrote as many bytes as we expected.
    if (bytes_written != bp_opcode_size)
    {
        error.SetErrorStringWithFormat("SoftwareBreakpoint::%s failed write memory while attempting to set breakpoint: attempted to write %lu bytes but only wrote %" PRIu64, __FUNCTION__, bp_opcode_size, (uint64_t)bytes_written);
        if (log)
            log->PutCString (error.AsCString ());
        return error;
    }

    uint8_t verify_bp_opcode_bytes [MAX_TRAP_OPCODE_SIZE];
    size_t verify_bytes_read = 0;
    error = process.ReadMemory(addr, verify_bp_opcode_bytes, bp_opcode_size, verify_bytes_read);
    if (error.Fail ())
    {
        if (log)
            log->Printf ("SoftwareBreakpoint::%s failed to read memory while attempting to verify the breakpoint set: %s", __FUNCTION__, error.AsCString ());
        return error;
    }

    // Ensure we read as many verification bytes as we expected.
    if (verify_bytes_read != bp_opcode_size)
    {
        if (log)
            log->Printf ("SoftwareBreakpoint::%s failed to read memory while attempting to verify breakpoint: attempted to read %lu bytes but only read %" PRIu64, __FUNCTION__, bp_opcode_size, (uint64_t)verify_bytes_read);
        return Error ("SoftwareBreakpoint::%s failed to read memory while attempting to verify breakpoint: attempted to read %lu bytes but only read %" PRIu64, __FUNCTION__, bp_opcode_size, (uint64_t)verify_bytes_read);
    }

    if (::memcmp(bp_opcode_bytes, verify_bp_opcode_bytes, bp_opcode_size) != 0)
    {
        if (log)
            log->Printf ("SoftwareBreakpoint::%s: verification of software breakpoint writing failed - trap opcodes not successfully read back after writing when setting breakpoint at 0x%" PRIx64, __FUNCTION__, addr);
        return Error ("SoftwareBreakpoint::%s: verification of software breakpoint writing failed - trap opcodes not successfully read back after writing when setting breakpoint at 0x%" PRIx64, __FUNCTION__, addr);
    }

    if (log)
        log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64 " -- SUCCESS", __FUNCTION__, addr);

    return Error ();
}

bool
ABISysV_hexagon::PrepareTrivialCall ( Thread &thread, 
                                      lldb::addr_t  sp  , 
                                      lldb::addr_t  pc  , 
                                      lldb::addr_t  ra  , 
                                      llvm::Type   &prototype,
                                      llvm::ArrayRef<ABI::CallArgument> args) const
{
    // default number of register passed arguments for varg functions
    const int nVArgRegParams = 1;
    Error error;

    // grab the process so we have access to the memory for spilling
    lldb::ProcessSP proc = thread.GetProcess( );

    // push host data onto target
    for ( size_t i = 0; i < args.size( ); i++ )
    {
        const ABI::CallArgument &arg = args[i];
        // skip over target values
        if ( arg.type == ABI::CallArgument::TargetValue )
            continue;
        // round up to 8 byte multiple
        size_t argSize = ( arg.size | 0x7 ) + 1;

        // create space on the stack for this data
        sp -= argSize;

        // write this argument onto the stack of the host process
        proc.get( )->WriteMemory( sp, arg.data, arg.size, error );
        if ( error.Fail( ) )
            return false;

        // update the argument with the target pointer
        //XXX: This is a gross hack for getting around the const
        *((size_t*)(&arg.value)) = sp;
    }


#if HEX_ABI_DEBUG
    // print the original stack pointer
    printf( "sp : %04lx \n", sp );
#endif

    // make sure number of parameters matches prototype
    assert( prototype.getFunctionNumParams( ) == args.size( ) );

    // check if this is a variable argument function
    bool isVArg = prototype.isFunctionVarArg();

    // get the register context for modifying all of the registers
    RegisterContext *reg_ctx = thread.GetRegisterContext().get();
    if (!reg_ctx)
        return false;
    
    // number of arguments passed by register
    int nRegArgs = nVArgRegParams;
    if (! isVArg )
    {
        // number of arguments is limited by [R0 : R5] space
        nRegArgs = args.size( );
        if ( nRegArgs > 6 )
            nRegArgs = 6;
    }

    // pass arguments that are passed via registers
    for ( int i = 0; i < nRegArgs; i++ )
    {
        // get the parameter as a u32
        uint32_t param = (uint32_t)args[i].value;
        // write argument into register
        if (!reg_ctx->WriteRegisterFromUnsigned( i, param ))
            return false;
    }

    // number of arguments to spill onto stack
    int nSpillArgs = args.size( ) - nRegArgs;
    // make space on the stack for arguments
    sp -= 4 * nSpillArgs;
    // align stack on an 8 byte boundary
    if ( sp & 7 )
        sp -= 4;

    // arguments that are passed on the stack
    for ( size_t i = nRegArgs, offs=0; i < args.size( ); i++ )
    {
        // get the parameter as a u32
        uint32_t param = (uint32_t)args[i].value;
        // write argument to stack
        proc->WriteMemory( sp + offs, (void*)&param, sizeof( param ), error );
        if ( !error.Success( ) )
            return false;
        // 
        offs += 4;
    }

    // update registers with current function call state
    reg_ctx->WriteRegisterFromUnsigned ( 41, pc );
    reg_ctx->WriteRegisterFromUnsigned ( 31, ra );
    reg_ctx->WriteRegisterFromUnsigned ( 29, sp );
//.........这里部分代码省略.........

//.........这里部分代码省略.........

    // 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();
                    }
                }
            }

Error
SoftwareBreakpoint::DoDisable ()
{
    Error error;
    assert (m_addr && (m_addr != LLDB_INVALID_ADDRESS) && "can't remove a software breakpoint for an invalid address");

    Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS));
    if (log)
        log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64, __FUNCTION__, m_addr);

    assert ( (m_opcode_size > 0) && "cannot restore opcodes when there are no opcodes");

    if (m_opcode_size > 0)
    {
        // Clear a software breakpoint instruction
        uint8_t curr_break_op [MAX_TRAP_OPCODE_SIZE];
        bool break_op_found = false;
        assert (m_opcode_size <= sizeof (curr_break_op));

        // Read the breakpoint opcode
        size_t bytes_read = 0;
        error = m_process.ReadMemory (m_addr, curr_break_op, m_opcode_size, bytes_read);
        if (error.Success() && bytes_read < m_opcode_size)
        {
            error.SetErrorStringWithFormat ("SoftwareBreakpointr::%s addr=0x%" PRIx64 ": tried to read %lu bytes but only read %" PRIu64, __FUNCTION__, m_addr, m_opcode_size, (uint64_t)bytes_read);
        }
        if (error.Success ())
        {
            bool verify = false;
            // Make sure the breakpoint opcode exists at this address
            if (::memcmp (curr_break_op, m_trap_opcodes, m_opcode_size) == 0)
            {
                break_op_found = true;
                // We found a valid breakpoint opcode at this address, now restore
                // the saved opcode.
                size_t bytes_written = 0;
                error = m_process.WriteMemory (m_addr, m_saved_opcodes, m_opcode_size, bytes_written);
                if (error.Success() && bytes_written < m_opcode_size)
                {
                    error.SetErrorStringWithFormat ("SoftwareBreakpoint::%s addr=0x%" PRIx64 ": tried to write %lu bytes but only wrote %" PRIu64, __FUNCTION__, m_addr, m_opcode_size, (uint64_t)bytes_written);
                }
                if (error.Success ())
                {
                    verify = true;
                }
            }
            else
            {
                error.SetErrorString("Original breakpoint trap is no longer in memory.");
                // Set verify to true and so we can check if the original opcode has already been restored
                verify = true;
            }

            if (verify)
            {
                uint8_t verify_opcode [MAX_TRAP_OPCODE_SIZE];
                assert (m_opcode_size <= sizeof (verify_opcode));
                // Verify that our original opcode made it back to the inferior

                size_t verify_bytes_read = 0;
                error = m_process.ReadMemory (m_addr, verify_opcode, m_opcode_size, verify_bytes_read);
                if (error.Success() && verify_bytes_read < m_opcode_size)
                {
                    error.SetErrorStringWithFormat ("SoftwareBreakpoint::%s addr=0x%" PRIx64 ": tried to read %lu verification bytes but only read %" PRIu64, __FUNCTION__, m_addr, m_opcode_size, (uint64_t)verify_bytes_read);
                }
                if (error.Success ())
                {
                    // compare the memory we just read with the original opcode
                    if (::memcmp (m_saved_opcodes, verify_opcode, m_opcode_size) == 0)
                    {
                        // SUCCESS
                        if (log)
                        {
                            int i = 0;
                            for (const uint8_t *verify_byte = verify_opcode; verify_byte < verify_opcode + m_opcode_size; ++verify_byte)
                            {
                                log->Printf("SoftwareBreakpoint::%s addr = 0x%" PRIx64
                                        " replaced byte index %d with 0x%hhx",
                                        __FUNCTION__, m_addr, i++, *verify_byte);
                            }
                            log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64 " -- SUCCESS", __FUNCTION__, m_addr);
                        }
                        return error;
                    }
                    else
                    {
                        if (break_op_found)
                            error.SetErrorString("Failed to restore original opcode.");
                    }
                }
                else
                    error.SetErrorString("Failed to read memory to verify that breakpoint trap was restored.");
            }
        }
    }

    if (log && error.Fail ())
        log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64 " -- FAILED: %s",
                __FUNCTION__,
                m_addr,
//.........这里部分代码省略.........

void
ConnectToRemote(GDBRemoteCommunicationServerLLGS &gdb_server,
        bool reverse_connect, const char *const host_and_port,
        const char *const progname, const char *const subcommand,
        const char *const named_pipe_path, int unnamed_pipe_fd)
{
    Error error;

    if (host_and_port && host_and_port[0])
    {
        // Parse out host and port.
        std::string final_host_and_port;
        std::string connection_host;
        std::string connection_port;
        uint32_t connection_portno = 0;

        // If host_and_port starts with ':', default the host to be "localhost" and expect the remainder to be the port.
        if (host_and_port[0] == ':')
            final_host_and_port.append ("localhost");
        final_host_and_port.append (host_and_port);

        const std::string::size_type colon_pos = final_host_and_port.find (':');
        if (colon_pos != std::string::npos)
        {
            connection_host = final_host_and_port.substr (0, colon_pos);
            connection_port = final_host_and_port.substr (colon_pos + 1);
            connection_portno = StringConvert::ToUInt32 (connection_port.c_str (), 0);
        }
        else
        {
            fprintf (stderr, "failed to parse host and port from connection string '%s'\n", final_host_and_port.c_str ());
            display_usage (progname, subcommand);
            exit (1);
        }

        if (reverse_connect)
        {
            // llgs will connect to the gdb-remote client.

            // Ensure we have a port number for the connection.
            if (connection_portno == 0)
            {
                fprintf (stderr, "error: port number must be specified on when using reverse connect");
                exit (1);
            }

            // Build the connection string.
            char connection_url[512];
            snprintf(connection_url, sizeof(connection_url), "connect://%s", final_host_and_port.c_str ());

            // Create the connection.
            std::unique_ptr<ConnectionFileDescriptor> connection_up (new ConnectionFileDescriptor ());
            connection_up.reset (new ConnectionFileDescriptor ());
            auto connection_result = connection_up->Connect (connection_url, &error);
            if (connection_result != eConnectionStatusSuccess)
            {
                fprintf (stderr, "error: failed to connect to client at '%s' (connection status: %d)", connection_url, static_cast<int> (connection_result));
                exit (-1);
            }
            if (error.Fail ())
            {
                fprintf (stderr, "error: failed to connect to client at '%s': %s", connection_url, error.AsCString ());
                exit (-1);
            }

            // We're connected.
            printf ("Connection established.\n");
            gdb_server.SetConnection (connection_up.release());
        }
        else
        {
            // llgs will listen for connections on the given port from the given address.
            // Start the listener on a new thread.  We need to do this so we can resolve the
            // bound listener port.
            StartListenThread(connection_host.c_str (), static_cast<uint16_t> (connection_portno));
            printf ("Listening to port %s for a connection from %s...\n", connection_port.c_str (), connection_host.c_str ());

            // If we have a named pipe to write the port number back to, do that now.
            if (named_pipe_path && named_pipe_path[0] && connection_portno == 0)
            {
                const uint16_t bound_port = s_listen_connection_up->GetListeningPort (10);
                if (bound_port > 0)
                {
                    error = writePortToPipe (named_pipe_path, bound_port);
                    if (error.Fail ())
                    {
                        fprintf (stderr, "failed to write to the named pipe \'%s\': %s", named_pipe_path, error.AsCString());
                    }
                }
                else
                {
                    fprintf (stderr, "unable to get the bound port for the listening connection\n");
                }
            }

            // If we have an unnamed pipe to write the port number back to, do that now.
            if (unnamed_pipe_fd >= 0 && connection_portno == 0)
            {
                const uint16_t bound_port = s_listen_connection_up->GetListeningPort(10);
                if (bound_port > 0)
//.........这里部分代码省略.........

Error
OptionValueArray::SetArgs (const Args &args, VarSetOperationType op)
{
    Error error;
    const size_t argc = args.GetArgumentCount();
    switch (op)
    {
    case eVarSetOperationInvalid:
        error.SetErrorString("unsupported operation");
        break;
        
    case eVarSetOperationInsertBefore:
    case eVarSetOperationInsertAfter:
        if (argc > 1)
        {
            uint32_t idx = StringConvert::ToUInt32(args.GetArgumentAtIndex(0), UINT32_MAX);
            const uint32_t count = GetSize();
            if (idx > count)
            {
                error.SetErrorStringWithFormat("invalid insert array index %u, index must be 0 through %u", idx, count);
            }
            else
            {
                if (op == eVarSetOperationInsertAfter)
                    ++idx;
                for (size_t i=1; i<argc; ++i, ++idx)
                {
                    lldb::OptionValueSP value_sp (CreateValueFromCStringForTypeMask (args.GetArgumentAtIndex(i),
                                                                                     m_type_mask,
                                                                                     error));
                    if (value_sp)
                    {
                        if (error.Fail())
                            return error;
                        if (idx >= m_values.size())
                            m_values.push_back(value_sp);
                        else
                            m_values.insert(m_values.begin() + idx, value_sp);
                    }
                    else
                    {
                        error.SetErrorString("array of complex types must subclass OptionValueArray");
                        return error;
                    }
                }
            }
        }
        else
        {
            error.SetErrorString("insert operation takes an array index followed by one or more values");
        }
        break;
        
    case eVarSetOperationRemove:
        if (argc > 0)
        {
            const uint32_t size = m_values.size();
            std::vector<int> remove_indexes;
            bool all_indexes_valid = true;
            size_t i;
            for (i=0; i<argc; ++i)
            {
                const size_t idx =
                  StringConvert::ToSInt32(args.GetArgumentAtIndex(i), INT32_MAX);
                if (idx >= size)
                {
                    all_indexes_valid = false;
                    break;
                }
                else
                    remove_indexes.push_back(idx);
            }
            
            if (all_indexes_valid)
            {
                size_t num_remove_indexes = remove_indexes.size();
                if (num_remove_indexes)
                {
                    // Sort and then erase in reverse so indexes are always valid
                    if (num_remove_indexes > 1)
                    {
                        std::sort(remove_indexes.begin(), remove_indexes.end());
                        for (std::vector<int>::const_reverse_iterator pos = remove_indexes.rbegin(), end = remove_indexes.rend(); pos != end; ++pos)
                        {
                            m_values.erase(m_values.begin() + *pos);
                        }
                    }
                    else
                    {
                        // Only one index
                        m_values.erase(m_values.begin() + remove_indexes.front());
                    }
                }
            }
            else
            {
                error.SetErrorStringWithFormat("invalid array index '%s', aborting remove operation", args.GetArgumentAtIndex(i));
            }
        }
        else
//.........这里部分代码省略.........

bool
lldb_private::formatters::NSIndexSetSummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& options)
{
    ProcessSP process_sp = valobj.GetProcessSP();
    if (!process_sp)
        return false;
    
    ObjCLanguageRuntime* runtime = (ObjCLanguageRuntime*)process_sp->GetLanguageRuntime(lldb::eLanguageTypeObjC);
    
    if (!runtime)
        return false;
    
    ObjCLanguageRuntime::ClassDescriptorSP descriptor(runtime->GetClassDescriptor(valobj));
    
    if (!descriptor.get() || !descriptor->IsValid())
        return false;
    
    uint32_t ptr_size = process_sp->GetAddressByteSize();
    
    lldb::addr_t valobj_addr = valobj.GetValueAsUnsigned(0);
    
    if (!valobj_addr)
        return false;
    
    const char* class_name = descriptor->GetClassName().GetCString();
    
    if (!class_name || !*class_name)
        return false;
    
    uint64_t count = 0;
    
    do {
        if (!strcmp(class_name,"NSIndexSet") || !strcmp(class_name,"NSMutableIndexSet"))
        {
            Error error;
            uint32_t mode = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr+ptr_size, 4, 0, error);
            if (error.Fail())
                return false;
            // this means the set is empty - count = 0
            if ((mode & 1) == 1)
            {
                count = 0;
                break;
            }
            if ((mode & 2) == 2)
                mode = 1; // this means the set only has one range
            else
                mode = 2; // this means the set has multiple ranges
            if (mode == 1)
            {
                count = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr+3*ptr_size, ptr_size, 0, error);
                if (error.Fail())
                    return false;
            }
            else
            {
                // read a pointer to the data at 2*ptr_size
                count = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr+2*ptr_size, ptr_size, 0, error);
                if (error.Fail())
                    return false;
                // read the data at 2*ptr_size from the first location
                count = process_sp->ReadUnsignedIntegerFromMemory(count+2*ptr_size, ptr_size, 0, error);
                if (error.Fail())
                    return false;
            }
        }
        else
        {
            if (!ExtractValueFromObjCExpression(valobj, "unsigned long long int", "count", count))
                return false;
        }
    }  while (false);
    stream.Printf("%" PRIu64 " index%s",
                  count,
                  (count == 1 ? "" : "es"));
    return true;
}

size_t
ConnectionFileDescriptor::Write (const void *src, size_t src_len, ConnectionStatus &status, Error *error_ptr)
{
    Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_CONNECTION));
    if (log)
        log->Printf ("%p ConnectionFileDescriptor::Write (src = %p, src_len = %" PRIu64 ")",
                     static_cast<void*>(this), static_cast<const void*>(src),
                     static_cast<uint64_t>(src_len));

    if (!IsConnected ())
    {
        if (error_ptr)
            error_ptr->SetErrorString("not connected");
        status = eConnectionStatusNoConnection;
        return 0;
    }


    Error error;

    size_t bytes_sent = src_len;
    error = m_write_sp->Write(src, bytes_sent);

    if (log)
    {
        log->Printf ("%p ConnectionFileDescriptor::Write(fd = %" PRIu64 ", src = %p, src_len = %" PRIu64 ") => %" PRIu64 " (error = %s)",
                     static_cast<void*>(this),
                     static_cast<uint64_t>(m_write_sp->GetWaitableHandle()),
                     static_cast<const void*>(src),
                     static_cast<uint64_t>(src_len),
                     static_cast<uint64_t>(bytes_sent),
                     error.AsCString());
    }

    if (error_ptr)
        *error_ptr = error;

    if (error.Fail())
    {
        switch (error.GetError())
        {
        case EAGAIN:
        case EINTR:
            status = eConnectionStatusSuccess;
            return 0;

        case ECONNRESET:// The connection is closed by the peer during a read attempt on a socket.
        case ENOTCONN:  // A read is attempted on an unconnected socket.
            status = eConnectionStatusLostConnection;
            break;  // Break to close....

        default:
            status = eConnectionStatusError;
            break;  // Break to close....
        }

        return 0;
    }

    status = eConnectionStatusSuccess;
    return bytes_sent;
}

//.........这里部分代码省略.........
            if (have_pipe_fd)
                FD_SET (pipe_fd, FD_SET_DATA(read_fds));

            Error error;

            if (log)
            {
                if (have_pipe_fd)
                    log->Printf("%p ConnectionFileDescriptor::BytesAvailable()  ::select (nfds=%i, fds={%i, %i}, NULL, NULL, timeout=%p)...",
                                static_cast<void*>(this), nfds, handle, pipe_fd,
                                static_cast<void*>(tv_ptr));
                else
                    log->Printf("%p ConnectionFileDescriptor::BytesAvailable()  ::select (nfds=%i, fds={%i}, NULL, NULL, timeout=%p)...",
                                static_cast<void*>(this), nfds, handle,
                                static_cast<void*>(tv_ptr));
            }

            const int num_set_fds = ::select (nfds, FD_SET_DATA(read_fds), NULL, NULL, tv_ptr);
            if (num_set_fds < 0)
                error.SetErrorToErrno();
            else
                error.Clear();

            if (log)
            {
                if (have_pipe_fd)
                    log->Printf("%p ConnectionFileDescriptor::BytesAvailable()  ::select (nfds=%i, fds={%i, %i}, NULL, NULL, timeout=%p) => %d, error = %s",
                                static_cast<void*>(this), nfds, handle,
                                pipe_fd, static_cast<void*>(tv_ptr), num_set_fds,
                                error.AsCString());
                else
                    log->Printf("%p ConnectionFileDescriptor::BytesAvailable()  ::select (nfds=%i, fds={%i}, NULL, NULL, timeout=%p) => %d, error = %s",
                                static_cast<void*>(this), nfds, handle,
                                static_cast<void*>(tv_ptr), num_set_fds,
                                error.AsCString());
            }

            if (error_ptr)
                *error_ptr = error;

            if (error.Fail())
            {
                switch (error.GetError())
                {
                    case EBADF:     // One of the descriptor sets specified an invalid descriptor.
                        return eConnectionStatusLostConnection;

                    case EINVAL:    // The specified time limit is invalid. One of its components is negative or too large.
                    default:        // Other unknown error
                        return eConnectionStatusError;

                    case EAGAIN:    // The kernel was (perhaps temporarily) unable to
                        // allocate the requested number of file descriptors,
                        // or we have non-blocking IO
                    case EINTR:     // A signal was delivered before the time limit
                        // expired and before any of the selected events
                        // occurred.
                        break;      // Lets keep reading to until we timeout
                }
            }
            else if (num_set_fds == 0)
            {
                return eConnectionStatusTimedOut;
            }
            else if (num_set_fds > 0)
            {
                if (FD_ISSET(handle, FD_SET_DATA(read_fds)))
                    return eConnectionStatusSuccess;
                if (have_pipe_fd && FD_ISSET(pipe_fd, FD_SET_DATA(read_fds)))
                {
                    // We got a command to exit.  Read the data from that pipe:
                    char buffer[16];
                    ssize_t bytes_read;

                    do
                    {
                        bytes_read = ::read (pipe_fd, buffer, sizeof(buffer));
                    } while (bytes_read < 0 && errno == EINTR);
                    
                    switch (buffer[0])
                    {
                    case 'q':
                        if (log)
                            log->Printf("%p ConnectionFileDescriptor::BytesAvailable() got data: %*s from the command channel.",
                                        static_cast<void*>(this),
                                        static_cast<int>(bytes_read), buffer);
                        return eConnectionStatusEndOfFile;
                    case 'i':
                        // Interrupt the current read
                        return eConnectionStatusInterrupted;
                    }
                }
            }
        }
    }

    if (error_ptr)
        error_ptr->SetErrorString("not connected");
    return eConnectionStatusLostConnection;
}

//.........这里部分代码省略.........
        if (launch_info.GetLaunchInSeparateProcessGroup())
        {
            debugserver_args.AppendArgument("--setsid");
        }

        llvm::SmallString<PATH_MAX> named_pipe_path;
        Pipe port_pipe;

        bool listen = false;
        if (host_and_port[0])
        {
            // Create a temporary file to get the stdout/stderr and redirect the
            // output of the command into this file. We will later read this file
            // if all goes well and fill the data into "command_output_ptr"

            if (in_port == 0)
            {
                // Binding to port zero, we need to figure out what port it ends up
                // using using a named pipe...
                error = port_pipe.CreateWithUniqueName("debugserver-named-pipe", false, named_pipe_path);
                if (error.Success())
                {
                    debugserver_args.AppendArgument("--named-pipe");
                    debugserver_args.AppendArgument(named_pipe_path.c_str());
                }
                else
                {
                    if (log)
                        log->Printf("GDBRemoteCommunication::%s() "
                                "named pipe creation failed: %s",
                                __FUNCTION__, error.AsCString());
                    // let's try an unnamed pipe
                    error = port_pipe.CreateNew(true);
                    if (error.Fail())
                    {
                        if (log)
                            log->Printf("GDBRemoteCommunication::%s() "
                                    "unnamed pipe creation failed: %s",
                                    __FUNCTION__, error.AsCString());
                        return error;
                    }
                    int write_fd = port_pipe.GetWriteFileDescriptor();
                    debugserver_args.AppendArgument("--pipe");
                    debugserver_args.AppendArgument(std::to_string(write_fd).c_str());
                    launch_info.AppendCloseFileAction(port_pipe.GetReadFileDescriptor());
                }
            }
            else
            {
                listen = true;
            }
        }
        else
        {
            // No host and port given, so lets listen on our end and make the debugserver
            // connect to us..
            error = StartListenThread ("127.0.0.1", 0);
            if (error.Fail())
                return error;

            ConnectionFileDescriptor *connection = (ConnectionFileDescriptor *)GetConnection ();
            // Wait for 10 seconds to resolve the bound port
            out_port = connection->GetListeningPort(10);
            if (out_port > 0)
            {
                char port_cstr[32];

bool
lldb_private::formatters::NSArraySummaryProvider (ValueObject& valobj, Stream& stream)
{
    ProcessSP process_sp = valobj.GetProcessSP();
    if (!process_sp)
        return false;
    
    ObjCLanguageRuntime* runtime = (ObjCLanguageRuntime*)process_sp->GetLanguageRuntime(lldb::eLanguageTypeObjC);
    
    if (!runtime)
        return false;
    
    ObjCLanguageRuntime::ClassDescriptorSP descriptor(runtime->GetClassDescriptor(valobj));
    
    if (!descriptor.get() || !descriptor->IsValid())
        return false;
    
    uint32_t ptr_size = process_sp->GetAddressByteSize();
    
    lldb::addr_t valobj_addr = valobj.GetValueAsUnsigned(0);
    
    if (!valobj_addr)
        return false;
    
    uint64_t value = 0;
    
    const char* class_name = descriptor->GetClassName().GetCString();
    
    if (!class_name || !*class_name)
        return false;
    
    if (!strcmp(class_name,"__NSArrayI"))
    {
        Error error;
        value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size, ptr_size, 0, error);
        if (error.Fail())
            return false;
    }
    else if (!strcmp(class_name,"__NSArrayM"))
    {
        Error error;
        value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size, ptr_size, 0, error);
        if (error.Fail())
            return false;
    }
    else if (!strcmp(class_name,"__NSCFArray"))
    {
        Error error;
        value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + 2 * ptr_size, ptr_size, 0, error);
        if (error.Fail())
            return false;
    }
    else
    {
        if (!ExtractValueFromObjCExpression(valobj, "int", "count", value))
            return false;
    }
    
    stream.Printf("@\"%" PRIu64 " object%s\"",
                  value,
                  value == 1 ? "" : "s");
    return true;
}

static FileSpec::EnumerateDirectoryResult
RecurseCopy_Callback (void *baton,
                      FileSpec::FileType file_type,
                      const FileSpec &src)
{
    RecurseCopyBaton* rc_baton = (RecurseCopyBaton*)baton;
    switch (file_type)
    {
        case FileSpec::eFileTypePipe:
        case FileSpec::eFileTypeSocket:
            // we have no way to copy pipes and sockets - ignore them and continue
            return FileSpec::eEnumerateDirectoryResultNext;
            break;
            
        case FileSpec::eFileTypeDirectory:
            {
                // make the new directory and get in there
                FileSpec dst_dir = rc_baton->dst;
                if (!dst_dir.GetFilename())
                    dst_dir.GetFilename() = src.GetLastPathComponent();
                std::string dst_dir_path (dst_dir.GetPath());
                Error error = rc_baton->platform_ptr->MakeDirectory(dst_dir_path.c_str(), lldb::eFilePermissionsDirectoryDefault);
                if (error.Fail())
                {
                    rc_baton->error.SetErrorStringWithFormat("unable to setup directory %s on remote end", dst_dir_path.c_str());
                    return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out
                }
                
                // now recurse
                std::string src_dir_path (src.GetPath());
                
                // Make a filespec that only fills in the directory of a FileSpec so
                // when we enumerate we can quickly fill in the filename for dst copies
                FileSpec recurse_dst;
                recurse_dst.GetDirectory().SetCString(dst_dir.GetPath().c_str());
                RecurseCopyBaton rc_baton2 = { recurse_dst, rc_baton->platform_ptr, Error() };
                FileSpec::EnumerateDirectory(src_dir_path.c_str(), true, true, true, RecurseCopy_Callback, &rc_baton2);
                if (rc_baton2.error.Fail())
                {
                    rc_baton->error.SetErrorString(rc_baton2.error.AsCString());
                    return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out
                }
                return FileSpec::eEnumerateDirectoryResultNext;
            }
            break;
            
        case FileSpec::eFileTypeSymbolicLink:
            {
                // copy the file and keep going
                FileSpec dst_file = rc_baton->dst;
                if (!dst_file.GetFilename())
                    dst_file.GetFilename() = src.GetFilename();
                
                char buf[PATH_MAX];
                
                rc_baton->error = Host::Readlink (src.GetPath().c_str(), buf, sizeof(buf));

                if (rc_baton->error.Fail())
                    return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out
                
                rc_baton->error = rc_baton->platform_ptr->CreateSymlink(dst_file.GetPath().c_str(), buf);

                if (rc_baton->error.Fail())
                    return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out

                return FileSpec::eEnumerateDirectoryResultNext;
            }
            break;
        case FileSpec::eFileTypeRegular:
            {
                // copy the file and keep going
                FileSpec dst_file = rc_baton->dst;
                if (!dst_file.GetFilename())
                    dst_file.GetFilename() = src.GetFilename();
                Error err = rc_baton->platform_ptr->PutFile(src, dst_file);
                if (err.Fail())
                {
                    rc_baton->error.SetErrorString(err.AsCString());
                    return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out
                }
                return FileSpec::eEnumerateDirectoryResultNext;
            }
            break;
            
        case FileSpec::eFileTypeInvalid:
        case FileSpec::eFileTypeOther:
        case FileSpec::eFileTypeUnknown:
            rc_baton->error.SetErrorStringWithFormat("invalid file detected during copy: %s", src.GetPath().c_str());
            return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out
            break;
    }
}

Error
PlatformAndroid::DownloadSymbolFile (const lldb::ModuleSP& module_sp,
                                     const FileSpec& dst_file_spec)
{
    // For oat file we can try to fetch additional debug info from the device
    if (module_sp->GetFileSpec().GetFileNameExtension() != ConstString("oat"))
        return Error("Symbol file downloading only supported for oat files");

    // If we have no information about the platform file we can't execute oatdump
    if (!module_sp->GetPlatformFileSpec())
        return Error("No platform file specified");

    // Symbolizer isn't available before SDK version 23
    if (GetSdkVersion() < 23)
        return Error("Symbol file generation only supported on SDK 23+");

    // If we already have symtab then we don't have to try and generate one
    if (module_sp->GetSectionList()->FindSectionByName(ConstString(".symtab")) != nullptr)
        return Error("Symtab already available in the module");

    int status = 0;
    std::string tmpdir;
    StreamString command;
    command.Printf("mktemp --directory --tmpdir %s", GetWorkingDirectory().GetCString());
    Error error = RunShellCommand(command.GetData(),
                                  GetWorkingDirectory(),
                                  &status,
                                  nullptr,
                                  &tmpdir,
                                  5 /* timeout (s) */);

    if (error.Fail() || status != 0 || tmpdir.empty())
        return Error("Failed to generate temporary directory on the device (%s)", error.AsCString());
    tmpdir.erase(tmpdir.size() - 1); // Remove trailing new line

    // Create file remover for the temporary directory created on the device
    std::unique_ptr<std::string, std::function<void(std::string*)>> tmpdir_remover(
        &tmpdir,
        [this](std::string* s) {
            StreamString command;
            command.Printf("rm -rf %s", s->c_str());
            Error error = this->RunShellCommand(command.GetData(),
                                                GetWorkingDirectory(),
                                                nullptr,
                                                nullptr,
                                                nullptr,
                                                5 /* timeout (s) */);

            Log *log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_PLATFORM));
            if (error.Fail())
                log->Printf("Failed to remove temp directory: %s", error.AsCString());
        }
    );

    FileSpec symfile_platform_filespec(tmpdir.c_str(), false);
    symfile_platform_filespec.AppendPathComponent("symbolized.oat");

    // Execute oatdump on the remote device to generate a file with symtab
    command.Clear();
    command.Printf("oatdump --symbolize=%s --output=%s",
                   module_sp->GetPlatformFileSpec().GetCString(false),
                   symfile_platform_filespec.GetCString(false));
    error = RunShellCommand(command.GetData(),
                            GetWorkingDirectory(),
                            &status,
                            nullptr,
                            nullptr,
                            60 /* timeout (s) */);
    if (error.Fail() || status != 0)
        return Error("Oatdump failed: %s", error.AsCString());

    // Download the symbolfile from the remote device
    return GetFile(symfile_platform_filespec, dst_file_spec);
}

//.........这里部分代码省略.........
                        }
                    }
                }
                else
                {
                    // Can't convert a file address to anything valid without more
                    // context (which Module it came from)
                    error.SetErrorString ("can't read memory from file address without more context");
                }
            }
        }
        break;

    case eValueTypeHostAddress:
        address = m_value.ULongLong(LLDB_INVALID_ADDRESS);
        address_type = eAddressTypeHost;
        if (exe_ctx)
        {
            Target *target = exe_ctx->GetTargetPtr();
            if (target)
            {
                data.SetByteOrder(target->GetArchitecture().GetByteOrder());
                data.SetAddressByteSize(target->GetArchitecture().GetAddressByteSize());
                break;
            }
        }
        // fallback to host settings
        data.SetByteOrder(lldb::endian::InlHostByteOrder());
        data.SetAddressByteSize(sizeof(void *));
        break;
    }

    // Bail if we encountered any errors
    if (error.Fail())
        return error;

    if (address == LLDB_INVALID_ADDRESS)
    {
        error.SetErrorStringWithFormat ("invalid %s address", address_type == eAddressTypeHost ? "host" : "load");
        return error;
    }

    // If we got here, we need to read the value from memory
    uint32_t byte_size = GetValueByteSize (ast_context, &error);

    // Bail if we encountered any errors getting the byte size
    if (error.Fail())
        return error;

    // Make sure we have enough room within "data", and if we don't make
    // something large enough that does
    if (!data.ValidOffsetForDataOfSize (data_offset, byte_size))
    {
        DataBufferSP data_sp(new DataBufferHeap (data_offset + byte_size, '\0'));
        data.SetData(data_sp);
    }

    uint8_t* dst = const_cast<uint8_t*>(data.PeekData (data_offset, byte_size));
    if (dst != NULL)
    {
        if (address_type == eAddressTypeHost)
        {
            // The address is an address in this process, so just copy it
            memcpy (dst, (uint8_t*)NULL + address, byte_size);
        }
        else if ((address_type == eAddressTypeLoad) || (address_type == eAddressTypeFile))