[11/12] Add a test for multiple setcontext calls

  Check multiple setcontext calls.

	* stdlib/Makefile ((tests): Add tst-setcontext5.
	* stdlib/tst-setcontext5.c: New file.
---
 stdlib/Makefile          |  3 +-
 stdlib/tst-setcontext5.c | 88 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 90 insertions(+), 1 deletion(-)
 create mode 100644 stdlib/tst-setcontext5.c
  

On 07/21/2018 10:20 AM, H.J. Lu wrote:
> Check multiple setcontext calls.
> 
> 	* stdlib/Makefile ((tests): Add tst-setcontext5.
> 	* stdlib/tst-setcontext5.c: New file.

OK for 2.28.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>.


> ---
>  stdlib/Makefile          |  3 +-
>  stdlib/tst-setcontext5.c | 88 ++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 90 insertions(+), 1 deletion(-)
>  create mode 100644 stdlib/tst-setcontext5.c
> 
> diff --git a/stdlib/Makefile b/stdlib/Makefile
> index 73d0e7c2a2..8db4f1d35a 100644
> --- a/stdlib/Makefile
> +++ b/stdlib/Makefile
> @@ -85,7 +85,8 @@ tests		:= tst-strtol tst-strtod testmb testrand testsort testdiv   \
>  		   test-at_quick_exit-race test-cxa_atexit-race             \
>  		   test-on_exit-race test-dlclose-exit-race 		    \
>  		   tst-makecontext-align test-bz22786 tst-strtod-nan-sign \
> -		   tst-swapcontext1 tst-swapcontext2 tst-setcontext4
> +		   tst-swapcontext1 tst-swapcontext2 tst-setcontext4 \
> +		   tst-setcontext5

OK.

>  
>  tests-internal	:= tst-strtod1i tst-strtod3 tst-strtod4 tst-strtod5i \
>  		   tst-tls-atexit tst-tls-atexit-nodelete
> diff --git a/stdlib/tst-setcontext5.c b/stdlib/tst-setcontext5.c
> new file mode 100644
> index 0000000000..7dcc15cb8e
> --- /dev/null
> +++ b/stdlib/tst-setcontext5.c
> @@ -0,0 +1,88 @@
> +/* Check multiple setcontext calls.

OK.

> +   Copyright (C) 2018 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <ucontext.h>
> +#include <unistd.h>
> +
> +static ucontext_t ctx[2];
> +static volatile int done;
> +
> +static void f2 (void);
> +
> +static void
> +__attribute__ ((noinline, noclone))
> +f1 (void)
> +{
> +  printf ("start f1\n");
> +  f2 ();
> +}

OK.

> +
> +static void
> +__attribute__ ((noinline, noclone))
> +f2 (void)
> +{
> +  printf ("start f2\n");
> +  if (setcontext (&ctx[1]) != 0)
> +    {
> +      printf ("%s: setcontext: %m\n", __FUNCTION__);
> +      exit (EXIT_FAILURE);
> +    }
> +}

OK.

> +
> +static void
> +f3 (void)
> +{
> +  printf ("start f3\n");
> +  if (done)
> +    exit (EXIT_SUCCESS);
> +  done = 1;
> +  if (setcontext (&ctx[0]) != 0)
> +    {
> +      printf ("%s: setcontext: %m\n", __FUNCTION__);
> +      exit (EXIT_FAILURE);
> +    }
> +}

OK.

> +
> +static int
> +do_test (void)
> +{
> +  char st1[32768];
> +
> +  puts ("making contexts");
> +  if (getcontext (&ctx[0]) != 0)
> +    {
> +      printf ("%s: getcontext: %m\n", __FUNCTION__);
> +      exit (EXIT_FAILURE);
> +    }
> +  if (getcontext (&ctx[1]) != 0)
> +    {
> +      printf ("%s: getcontext: %m\n", __FUNCTION__);
> +      exit (EXIT_FAILURE);
> +    }
> +  ctx[1].uc_stack.ss_sp = st1;
> +  ctx[1].uc_stack.ss_size = sizeof st1;
> +  ctx[1].uc_link = &ctx[0];
> +  makecontext (&ctx[1], (void (*) (void)) f3, 0);
> +  f1 ();
> +  puts ("FAIL: returned from f1 ()");
> +  exit (EXIT_FAILURE);
> +}
> +
> +#include <support/test-driver.c>

OK.

>