1 files changed, 75 insertions, 0 deletions
diff --git a/gprofng/testsuite/gprofng.display/synprog/pagethrash.c b/gprofng/testsuite/gprofng.display/synprog/pagethrash.c
new file mode 100644
index 00000000000..a9096005322
--- /dev/null
+++ b/gprofng/testsuite/gprofng.display/synprog/pagethrash.c
@@ -0,0 +1,75 @@
+/* Copyright (C) 2021 Free Software Foundation, Inc.
+   Contributed by Oracle.
+
+   This file is part of GNU Binutils.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "stopwatch.h"
+
+/*=======================================================*/
+
+/* pagethrash - allocate some memory, and thrash around in it */
+int
+pagethrash (int thrashmb)
+{
+  char buf[1024];
+
+  hrtime_t start = gethrtime ();
+  hrtime_t vstart = gethrvtime ();
+
+  /* Log the event */
+  wlog ("start of pagethrash", NULL);
+
+  /* Start a stopwatch */
+  stopwatch_t *w = stpwtch_alloc ("pagethrash", 0);
+
+  /* compute the size */
+  unsigned long size = thrashmb * 1024 * 1024;
+  int pagesize = getpagesize ();
+  void *space = malloc (size + pagesize);
+  if (space == NULL)
+    {
+      fprintf (stderr, "\tpagethrash failed; can't get %ld bytes.\n", size);
+      exit (1);
+    }
+
+  /* round address to page boundary */
+  unsigned long loc = (((unsigned long) space + pagesize - 1) & ~(pagesize - 1));
+  long npages = size / pagesize;
+
+  /* touch all the pages to force them in */
+  for (long i = 0; i < npages; i++)
+    {
+      stpwtch_start (w);
+      *(int *) (loc + i * pagesize) = i;
+      stpwtch_stop (w);
+    }
+
+  /* now free up the space */
+  free (space);
+
+  /* print the timing results */
+  stpwtch_print (w);
+  free ((void *) w);
+
+  sprintf (buf, "pagethrash: %ld pages", npages);
+  whrvlog (gethrtime () - start, gethrvtime () - vstart, buf, NULL);
+  return 0;
+}