Attachment 928482 Details for Bug 1113143 – Stripped down reproducer

Stripped down reproducer

test.c (text/plain), 1.04 KB, created by Jaroslav Škarvada on 2014-08-19 18:27:43 UTC

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Creator: Jaroslav Škarvada

Created: 2014-08-19 18:27:43 UTC

Size: 1.04 KB

patch

obsolete

>#include <stdlib.h>
>#include <stdio.h>
>#include <sys/types.h>
>#include <sys/stat.h>
>#include <sys/wait.h>
>#include <fcntl.h>
>#include <unistd.h>
>#include <sched.h>
>#include <fcntl.h>
>
>#define STACK_SIZE 16384
>#define FNAME "/var/tmp/test.txt"
>
>pid_t pid1, pid2;
>int fd;
>char *stack1, *stack2, *stacktop1, *stacktop2;
>char loop = 0;
>char buf[256] = {0};
>
>int a()
>{
>  write(fd, "error msg1\n", 11);
>}
>
>int b()
>{
>  write(fd, "error msg2\n", 11);
>}
>
>int main(int argc, char argv[])
>{
>  stack1 = malloc(STACK_SIZE);
>  stack2 = malloc(STACK_SIZE);
>  stacktop1 = stack1 + STACK_SIZE;
>  stacktop2 = stack2 + STACK_SIZE;
>  do
>  {
>    unlink(FNAME);
>    fd = open(FNAME, O_RDWR | O_CREAT | O_EXCL, 0600);
>    if (fd < 0)
>    {
>      printf("open failed\n");
>      return 1;
>    }
>    pid1 = clone(a, stacktop1, SIGCHLD, NULL);
>    pid2 = clone(b, stacktop2, SIGCHLD, NULL);
>    waitpid(pid1, NULL, 0);
>    waitpid(pid2, NULL, 0);
>    lseek(fd, 0, SEEK_SET);
>    loop = read(fd, buf, 22) == 22;
>    close(fd);
>  }
>  while (loop);
>  free(stack1);
>  free(stack2);
>  return 0;
>}

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Attachments on bug 1113143: 926075 | 928482 | 928486