tests/testclone.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <signal.h>
   4 #include <unistd.h>
   5 #include <inttypes.h>
   6 #include <pthread.h>
   7 #include <sys/wait.h>
   8 #include <sched.h>
   9
  10 int thread1_func(void *arg)
  11 {
  12     int i;
  13     char buf[512];
  14
  15     for(i=0;i<10;i++) {
  16         snprintf(buf, sizeof(buf), "thread1: %d %s\n", i, (char *)arg);
  17         write(1, buf, strlen(buf));
  18         usleep(100 * 1000);
  19     }
  20     return 0;
  21 }
  22
  23 int thread2_func(void *arg)
  24 {
  25     int i;
  26     char buf[512];
  27     for(i=0;i<20;i++) {
  28         snprintf(buf, sizeof(buf), "thread2: %d %s\n", i, (char *)arg);
  29         write(1, buf, strlen(buf));
  30         usleep(120 * 1000);
  31     }
  32     return 0;
  33 }
  34
  35 #define STACK_SIZE 16384
  36
  37 void test_clone(void)
  38 {
  39     uint8_t *stack1, *stack2;
  40     int pid1, pid2, status1, status2;
  41
  42     stack1 = malloc(STACK_SIZE);
  43     pid1 = clone(thread1_func, stack1 + STACK_SIZE,
  44                  CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD, "hello1");
  45
  46     stack2 = malloc(STACK_SIZE);
  47     pid2 = clone(thread2_func, stack2 + STACK_SIZE,
  48                  CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD, "hello2");
  49
  50     while (waitpid(pid1, &status1, 0) != pid1);
  51     while (waitpid(pid2, &status2, 0) != pid2);
  52     printf("status1=0x%x\n", status1);
  53     printf("status2=0x%x\n", status2);
  54     printf("End of clone test.\n");
  55 }
  56
  57 int main(int argc, char **argv)
  58 {
  59     test_clone();
  60     return 0;
  61 }