[testsuite] Fix gcc.dg/tree-prof/val-profiler-threads-1.c

[Eric Botcazou]

The manual says that the type of the 2nd argument of pthread_join is void **.
Now gcc.dg/tree-prof/val-profiler-threads-1.c does this:

    int retval;
    for(t=0;t<NUM_THREADS;t++)
      pthread_join (threads[t], (void**)&retval);

which means a potential buffer overflow on LP64 targets in addition to an 
alignment issue if the target is strict-alignment, for example SPARC 64-bit.

Tested on SPARC64/Linux, applied on the mainline and 7 branch as obvious.


2017-06-28  Eric Botcazou  <ebotca...@adacore.com>

        * gcc.dg/tree-prof/val-profiler-threads-1.c (main): Fix 2nd argument
        passed to pthread_join.

-- 
Eric Botcazou
Index: gcc.dg/tree-prof/val-profiler-threads-1.c
===================================================================
--- gcc.dg/tree-prof/val-profiler-threads-1.c	(revision 249619)
+++ gcc.dg/tree-prof/val-profiler-threads-1.c	(working copy)
@@ -35,9 +35,9 @@ int main(int argc, char *argv[])
        }
      }
 
-   int retval;
+   void *retval;
    for(t=0;t<NUM_THREADS;t++)
-     pthread_join (threads[t], (void**)&retval);
+     pthread_join (threads[t], &retval);
 
    return buffer[10];
 }