Attachment 155238 Details for Bug 240958 – Testcase workarounding the CLONE_PTRACE kernel bug.

Testcase workarounding the CLONE_PTRACE kernel bug.

clone.c (text/plain), 1.17 KB, created by Jan Kratochvil on 2007-05-23 13:53:57 UTC

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Creator: Jan Kratochvil

Created: 2007-05-23 13:53:57 UTC

Size: 1.17 KB

patch

obsolete

>#include <unistd.h>
>#include <assert.h>
>#include <sys/types.h>
>#include <sys/wait.h>
>#include <stdlib.h>
>#include <sched.h>
>#include <sys/mman.h>
>
>//#undef CLONE_PTRACE
>
>static int
>child_func (void *arg)
>{
>  _exit (EXIT_SUCCESS);
>  abort ();
>}
>
>int
>main (void)
>{
>#ifndef PAGE_SIZE
>#define PAGE_SIZE 0x1000
>#endif
>  const size_t stack_size = PAGE_SIZE;
>  unsigned char *stack = mmap (NULL, stack_size, PROT_READ | PROT_WRITE,
>			       MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
>  int child_tid;
>  pid_t pid_got;
>  int status;
>
>  assert (stack != NULL);
>  assert (stack != MAP_FAILED);
>  stack[0] = 0;
>  stack[stack_size - 1] = 0;
>
>#ifndef CLONE_PTRACE
>#define CLONE_PTRACE 0
>#endif
>
>#ifdef __ia64__
>  extern int __clone2 (int (*fn) (void *arg), void *child_stack,
>		       size_t stack_size, int flags, void *arg);
>  child_tid = __clone2 (child_func, stack + stack_size, stack_size,
>			CLONE_PTRACE, NULL);
>#else	/* !__ia64__ */
>  child_tid = clone (child_func, stack + stack_size, CLONE_PTRACE, NULL);
>#endif	/* !__ia64__ */
>
>  pid_got = waitpid (child_tid, &status, __WCLONE);
>  assert (pid_got == child_tid);
>  assert (WIFEXITED (status));
>  assert (WEXITSTATUS (status) == 0);
>
>  return EXIT_SUCCESS;
>}

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Attachments on bug 240958: 155237 | 155238