On Thu, Oct 14, 2021 at 07:02:37PM +0200, Christian Weisgerber wrote:
> Stefan Sperling:
> 
> > Just out of curiousity, can you produce a short
> > program that calls murmurhash2 and triggers an alignment fault on sparc64,
> > octeon, or similar platforms?
> 
> I don't have a strict alignment arch at hand, but this should do
> it:
> 
> #include <sys/types.h>
> #include <murmurhash2.h>
> #include <stdio.h>
> 
> #define SIZE 10
> 
> int main(void)
> {
> 	char a[SIZE+4];
> 	int i;
> 
> 	for (i = 0; i < 4; i++) {
> 		printf("%d\n", i);
> 		fflush(stdout);
> 		murmurhash2(a+i, SIZE, 0);
> 	}
> 
> 	return 0;
> }

Yes, this triggers are core dump on sparc64:

$ cc naddy.c  
$ ./a.out                                    
0
1
Bus error (core dumped) 
$


And with fixed murmurhash2:

$ ./a.out     
0
1
2
3
$ 

Thank you for providing a test case!