helper.cc

Go to the documentation of this file.

/*
 * This file is part of openSDK.
 *
 * Copyright (C) 2006-2007 openSDK team
 *
 * openSDK is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2.
 *
 * openSDK is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with openSDK; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *     $Id: helper.cc,v 1.5 2007/07/16 13:09:00 nuno-lopes Exp $
 */

#include <iostream>
#include <dlfcn.h>
#include <OPENR/OSyslog.h>
#include "helper.h"

using namespace std;

void* module_executor(void *arg)
{
        BLOCK_SIGNALS()
        pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);

        executorArg* args = (executorArg*)arg;

        if (pthread_setspecific(perThreadKey, args->threadData)) {
                OSYSLOG1((osyslogERROR, "pthread_setspecific() failed"));
                return (void*)2;
        }

        void* (*function)(void);

        // load the module and call the entry-point function
        {
        const int dlopen_flags = RTLD_LAZY
#ifdef RTLD_LOCAL
        | RTLD_LOCAL
#endif
#ifdef RTLD_DEEPBIND
        | RTLD_DEEPBIND
#endif
        ; // from dlopen_flags

        void *handle = dlopen(args->mod_name.c_str(), dlopen_flags);
        // compatibility with GDB: don't delete the library file because GDB reads the file multiple times
        // unlink(args->mod_name.c_str());

        if (!handle) {
                cerr << "error loading " << dlerror() << endl;
                exit(0x50);
        }

        function = (void* (*)(void))dlsym(handle, "__start_module");
        if (!function) {
                cerr << "Critical error: Couldn't locate the entry point of " << args->mod_name << endl;
                dlclose(handle);
                exit(0x51);
        }
        }

        delete args;

        return function();
}

---