gdbserver_tests/clean_after_fork.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <errno.h>
   4 #include <unistd.h>
   5 #include <sys/wait.h>
   6 int main()
   7 {
   8    int mem = 0, pid;
   9    pid = fork();
  10    if (pid == -1) {
  11       mem = 1;
  12       perror("fork");
  13       exit(1);
  14    }
  15
  16    if (pid == 0) {
  17       int burn;
  18       for (burn = 0; burn < 100000; burn++) /* burncpu */__asm__ __volatile("":::"memory") ;
  19       if (mem == 0)
  20          exit(0);
  21       else
  22          exit(1);
  23    } else {
  24       int ret;
  25       int status;
  26       while((ret = waitpid(pid, &status, 0)) != pid) {
  27          if (errno != EINTR) {
  28             perror("waitpid");
  29             exit(1);
  30          }
  31       }
  32       mem = status;
  33    }
  34    if (mem == 0)
  35       printf("mem is zero\n");
  36
  37    return 0;
  38 }