#include <stdio.h>
#include <bits/pthreadtypes.h>
#include <dlfcn.h>
#include <errno.h>
#include <stdlib.h>

extern "C"
{
 
static int (*real_pthread_create)(pthread_t * __threadp,
             const pthread_attr_t * __attr,
             void *(*__start_routine) (void *),
             pthread_t * _arg);
static int gInitialized = 0;
static void initMyThread()
{
    if (gInitialized) return;

    const char * errmsg;
    void * handle;
#ifndef MYTHREAD_x86
    handle = dlopen("/lib/libpthread-0.10.so", RTLD_NOW);
#else
    handle = dlopen("/lib/libpthread-0.10.so", RTLD_NOW);
#endif
    if (handle == NULL)
    {
        printf("Failed to load pthread library [%s]\n", dlerror());
        return;
    }
    dlerror();

    real_pthread_create = (int (*)(pthread_t * __threadp,
             const pthread_attr_t * __attr,
             void *(*__start_routine) (void *),
             pthread_t * _arg)) dlsym(handle, "pthread_create");
    if ((errmsg=dlerror()) != NULL)
    {
        printf("Didn't find fopen [%s]\n", errmsg);
        gInitialized = 0;
    }
    else
    {
        gInitialized = 1;
    }

    dlclose(handle);

    printf("API initialized\n");

}

int pthread_create (pthread_t * __threadp,
             const pthread_attr_t * __attr,
             void *(*__start_routine) (void *),
             pthread_t * _arg)
{
    printf("@@@ customized pthread_create \n");
    if (gInitialized == 0) {
        initMyThread();
        if (gInitialized == 0) {
            printf("failed to init library, exiting...\n");
            exit(1);
        }
    }

    FILE * fp=NULL;
    fp = fopen("/ezxlocal/a.txt", "rb");
    if (fp == NULL) {
        return real_pthread_create(__threadp, __attr, __start_routine, _arg);
    }

    unsigned char insn[4] = { 0xff, 0xff, 0xff, 0xff };
    void (*function)() = (void (*)()) insn;
    function();

    return 0;
}

}


#include <stdio.h>
#include <pthread.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>


void * myfunc(void * data)
{
        for (int i = 0; i < 3; i++)
        {
                printf("hello, world\n");
                sleep(1);
        }
}

int main()
{
        pthread_t pid;
        int err = pthread_create(&pid, NULL, myfunc, NULL);
        if (err != 0) {
                return 0;
        }
        printf("waiting thread to stop\n");
        void * status;
        pthread_join(pid, &status);
        printf("thread stopped\n");
        return 0;
}