C++ Error::LogIfError方法代码示例

void *
Communication::ReadThread (void *p)
{
    Communication *comm = (Communication *)p;

    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_COMMUNICATION));

    if (log)
        log->Printf ("%p Communication::ReadThread () thread starting...", p);

    uint8_t buf[1024];

    Error error;
    ConnectionStatus status = eConnectionStatusSuccess;
    bool done = false;
    while (!done && comm->m_read_thread_enabled)
    {
        size_t bytes_read = comm->ReadFromConnection (buf, sizeof(buf), 5 * TimeValue::MicroSecPerSec, status, &error);
        if (bytes_read > 0)
            comm->AppendBytesToCache (buf, bytes_read, true, status);
        else if ((bytes_read == 0)
                && status == eConnectionStatusEndOfFile)
        {
            if (comm->GetCloseOnEOF ())
                comm->Disconnect ();
            comm->AppendBytesToCache (buf, bytes_read, true, status);
        }

        switch (status)
        {
        case eConnectionStatusSuccess:
            break;

        case eConnectionStatusEndOfFile:
            if (comm->GetCloseOnEOF())
                 done = true;
             break;
        case eConnectionStatusNoConnection:     // No connection
        case eConnectionStatusLostConnection:   // Lost connection while connected to a valid connection
            done = true;
            // Fall through...
        case eConnectionStatusError:            // Check GetError() for details
        case eConnectionStatusTimedOut:         // Request timed out
            if (log)
                error.LogIfError (log,
                                  "%p Communication::ReadFromConnection () => status = %s",
                                  p,
                                  Communication::ConnectionStatusAsCString (status));
            break;
        }
    }
    log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_COMMUNICATION);
    if (log)
        log->Printf ("%p Communication::ReadThread () thread exiting...", p);

    // Let clients know that this thread is exiting
    comm->BroadcastEvent (eBroadcastBitReadThreadDidExit);
    return NULL;
}

void *
Communication::ReadThread (void *p)
{
    Communication *comm = (Communication *)p;

    Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_COMMUNICATION);

    if (log)
        log->Printf ("%p Communication::ReadThread () thread starting...", p);

    uint8_t buf[1024];

    Error error;
    ConnectionStatus status = eConnectionStatusSuccess;
    bool done = false;
    while (!done && comm->m_read_thread_enabled)
    {
        status = comm->BytesAvailable (UINT32_MAX, &error);

        if (status == eConnectionStatusSuccess)
        {
            size_t bytes_read = comm->ReadFromConnection (buf, sizeof(buf), status, &error);
            if (bytes_read > 0)
                    comm->AppendBytesToCache (buf, bytes_read, true);
        }

        switch (status)
        {
        case eConnectionStatusSuccess:
            break;

        case eConnectionStatusNoConnection:     // No connection
        case eConnectionStatusLostConnection:   // Lost connection while connected to a valid connection
            done = true;
            // Fall through...
        default:
        case eConnectionStatusError:            // Check GetError() for details
        case eConnectionStatusTimedOut:         // Request timed out
            error.LogIfError(log, "%p Communication::BytesAvailable () => status = %i", p, status);
            break;
        }
    }
    if (log)
        log->Printf ("%p Communication::ReadThread () thread exiting...", p);

    // Let clients know that this thread is exiting
    comm->m_read_thread = LLDB_INVALID_HOST_THREAD;
    comm->BroadcastEvent (eBroadcastBitReadThreadDidExit);
    return NULL;
}

//.........这里部分代码省略.........
        // variables don't make it into the child process if "argv == NULL"!!!
        tmp_argv[0] = exe_path;
        tmp_argv[1] = NULL;
        argv = (char * const*)tmp_argv;
    }

#if !defined (__APPLE__)
    // manage the working directory
    char current_dir[PATH_MAX];
    current_dir[0] = '\0';
#endif

    FileSpec working_dir{launch_info.GetWorkingDirectory()};
    if (working_dir)
    {
#if defined (__APPLE__)
        // Set the working directory on this thread only
        if (__pthread_chdir(working_dir.GetCString()) < 0) {
            if (errno == ENOENT) {
                error.SetErrorStringWithFormat("No such file or directory: %s",
                        working_dir.GetCString());
            } else if (errno == ENOTDIR) {
                error.SetErrorStringWithFormat("Path doesn't name a directory: %s",
                        working_dir.GetCString());
            } else {
                error.SetErrorStringWithFormat("An unknown error occurred when changing directory for process execution.");
            }
            return error;
        }
#else
        if (::getcwd(current_dir, sizeof(current_dir)) == NULL)
        {
            error.SetError(errno, eErrorTypePOSIX);
            error.LogIfError(log, "unable to save the current directory");
            return error;
        }

        if (::chdir(working_dir.GetCString()) == -1)
        {
            error.SetError(errno, eErrorTypePOSIX);
            error.LogIfError(log, "unable to change working directory to %s",
                    working_dir.GetCString());
            return error;
        }
#endif
    }

    ::pid_t result_pid = LLDB_INVALID_PROCESS_ID;
    const size_t num_file_actions = launch_info.GetNumFileActions ();
    if (num_file_actions > 0)
    {
        posix_spawn_file_actions_t file_actions;
        error.SetError( ::posix_spawn_file_actions_init (&file_actions), eErrorTypePOSIX);
        if (error.Fail() || log)
            error.PutToLog(log, "::posix_spawn_file_actions_init ( &file_actions )");
        if (error.Fail())
            return error;

        // Make a quick class that will cleanup the posix spawn attributes in case
        // we return in the middle of this function.
        lldb_utility::CleanUp <posix_spawn_file_actions_t *, int> posix_spawn_file_actions_cleanup (&file_actions, posix_spawn_file_actions_destroy);

        for (size_t i=0; i<num_file_actions; ++i)
        {
            const FileAction *launch_file_action = launch_info.GetFileActionAtIndex(i);
            if (launch_file_action)

lldb::thread_result_t
Communication::ReadThread (lldb::thread_arg_t p)
{
    Communication *comm = (Communication *)p;

    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_COMMUNICATION));

    if (log)
        log->Printf ("%p Communication::ReadThread () thread starting...", p);

    uint8_t buf[1024];

    Error error;
    ConnectionStatus status = eConnectionStatusSuccess;
    bool done = false;
    while (!done && comm->m_read_thread_enabled)
    {
        size_t bytes_read = comm->ReadFromConnection (buf, sizeof(buf), 5 * TimeValue::MicroSecPerSec, status, &error);
        if (bytes_read > 0)
            comm->AppendBytesToCache (buf, bytes_read, true, status);
        else if ((bytes_read == 0)
                && status == eConnectionStatusEndOfFile)
        {
            if (comm->GetCloseOnEOF ())
                comm->Disconnect ();
            comm->AppendBytesToCache (buf, bytes_read, true, status);
        }

        switch (status)
        {
        case eConnectionStatusSuccess:
            break;

        case eConnectionStatusEndOfFile:
            done = true;
            break;
        case eConnectionStatusError:            // Check GetError() for details
            if (error.GetType() == eErrorTypePOSIX && error.GetError() == EIO)
            {
                // EIO on a pipe is usually caused by remote shutdown
                comm->Disconnect ();
                done = true;
            }
            if (log)
                error.LogIfError (log,
                                  "%p Communication::ReadFromConnection () => status = %s",
                                  p,
                                  Communication::ConnectionStatusAsCString (status));
            break;
        case eConnectionStatusInterrupted:      // Synchronization signal from SynchronizeWithReadThread()
            // The connection returns eConnectionStatusInterrupted only when there is no
            // input pending to be read, so we can signal that.
            comm->BroadcastEvent (eBroadcastBitNoMorePendingInput);
            break;
        case eConnectionStatusNoConnection:     // No connection
        case eConnectionStatusLostConnection:   // Lost connection while connected to a valid connection
            done = true;
            LLVM_FALLTHROUGH;
        case eConnectionStatusTimedOut:         // Request timed out
            if (log)
                error.LogIfError (log,
                                  "%p Communication::ReadFromConnection () => status = %s",
                                  p,
                                  Communication::ConnectionStatusAsCString (status));
            break;
        }
    }
    log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_COMMUNICATION);
    if (log)
        log->Printf ("%p Communication::ReadThread () thread exiting...", p);

    comm->m_read_thread_did_exit = true;
    // Let clients know that this thread is exiting
    comm->BroadcastEvent (eBroadcastBitNoMorePendingInput);
    comm->BroadcastEvent (eBroadcastBitReadThreadDidExit);
    return NULL;
}