[PATCH] libstdc++: Replace invalid memset usage in testsuite

[Jonathan Wakely]

The __gnu_test::MallocInfo struct has a non-trivial default constructor
which causes -Wclass-memaccess warnings when it is cleared using memset.
Use assignment from value-initialized objects instead of memset.

For consistency, clear rusage structs the same way.

libstdc++-v3/ChangeLog:

        * testsuite/util/testsuite_performance.h (resource_counter): Do
        not use memset to clear non-trivial objects.
---

Tested x86_64-linux.

 libstdc++-v3/testsuite/util/testsuite_performance.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/libstdc++-v3/testsuite/util/testsuite_performance.h 
b/libstdc++-v3/testsuite/util/testsuite_performance.h
index 524a1a577858..ff85d77eb45d 100644
--- a/libstdc++-v3/testsuite/util/testsuite_performance.h
+++ b/libstdc++-v3/testsuite/util/testsuite_performance.h
@@ -157,17 +157,17 @@ namespace __gnu_test
     void
     clear() throw()
     {
-      memset(&rusage_begin, 0, sizeof(rusage_begin));
-      memset(&rusage_end, 0, sizeof(rusage_end));
-      memset(&allocation_begin, 0, sizeof(allocation_begin));
-      memset(&allocation_end, 0, sizeof(allocation_end));
+      rusage_begin = rusage();
+      rusage_end = rusage();
+      allocation_begin = MallocInfo();
+      allocation_end = MallocInfo();
     }
 
     void
     start()
     {
       if (getrusage(who, &rusage_begin) != 0 )
-       memset(&rusage_begin, 0, sizeof(rusage_begin));
+       rusage_begin = rusage();
       void* p __attribute__((unused)) = malloc(0); // Needed for some 
implementations.
       allocation_begin = malloc_info();
     }
@@ -176,7 +176,7 @@ namespace __gnu_test
     stop()
     {
       if (getrusage(who, &rusage_end) != 0 )
-       memset(&rusage_end, 0, sizeof(rusage_end));
+       rusage_end = rusage();
       allocation_end = malloc_info();
     }
 
-- 
2.55.0