[Bug runtime/31074] On aarch64 the systemtap.base/set_kernel.stp triggers "Unable to handle kernel paging request"

["mark at klomp dot org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=31074

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
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                 CC|                            |mark at klomp dot org

--- Comment #7 from Mark Wielaard <mark at klomp dot org> ---
(In reply to William Cohen from comment #6)
> On aarch64 sizeof('\0') is returning 4 rather than 1 as expected for a
> character.

That is actually so on all arches. The confusing thing is that a character
constant has type int. Which explains why sizeof ('a') is really sizeof (int)
== 4. While char c = 'a'; sizeof (c) == 1 (sizeof (char)).

Note that C and C++ differ here. In C++ character constants are type char and
so this program:

#include <stdio.h>

int
main ()
{
  printf ("sizeof literal char: %d\n", sizeof ('a'));
}

$ gcc -g -o c c.c
$ ./c 
sizeof literal char: 4
$ g++ -g -o c c.c
$ ./c 
sizeof literal char: 1

Aren't C and C++ fun? :)

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