Clean up after newlib "nvptx: In offloading execution, map '_exit' to 'abort' [GCC PR85463]"

[Thomas Schwinge]

Hi!

Re the newlib commit 05a2d7a8b3277b469e7cb121115bba398adc8559
"nvptx: In offloading execution, map '_exit' to 'abort' [GCC PR85463]"
that I've just pushes to newlib main branch:

On 2023-01-19T23:00:05+0100, I wrote:
> This is still not properly resolving <https://gcc.gnu.org/PR85463>
> '[nvptx] "exit" in offloaded region doesn't terminate process', but is
> one step into that direction, and allows for simplifying some GCC code.

> --- a/newlib/libc/machine/nvptx/_exit.c
> +++ b/newlib/libc/machine/nvptx/_exit.c

> @@ -26,7 +27,15 @@ void __attribute__((noreturn))
>  _exit (int status)
>  {
>    if (__exitval_ptr)
> -    *__exitval_ptr = status;
> -  for (;;)
> -    asm ("exit;" ::: "memory");
> +    {
> +      *__exitval_ptr = status;
> +      for (;;)
> +       asm ("exit;" ::: "memory");
> +    }
> +  else /* offloading */
> +    {
> +      /* Map to 'abort'; see <https://gcc.gnu.org/PR85463>
> +        '[nvptx] "exit" in offloaded region doesn't terminate process'.  */
> +      abort ();
> +    }
>  }

That has put "the PR85463 stuff" into the one central place, and allows
for simplifying GCC as per the attached
'Clean up after newlib "nvptx: In offloading execution, map '_exit' to 'abort' [GCC PR85463]"',
which I've just pushed to GCC devel/omp/gcc-12 branch in
commit 094b379f461bb4b635327cde26eabc0966159fec, and intend to push to
GCC master branch once the latter depends on updated newlib for other
(functional) reasons.


Grüße
 Thomas


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