Test program for mtrace.

malloc/tst-mtrace.c

@@ -0,0 +1,103 @@
+/* Test program for mtrace.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <mcheck.h>
+#include <paths.h>
+#include <search.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+static void print (const void *node, VISIT value, int level);
+
+/* Used for several purposes.  */
+static FILE *fp;
+
+
+int
+main (void)
+{
+  void *root = NULL;
+  size_t linelen = 0;
+  char *line = NULL;
+
+  /* Enable memory usage tracing.  */
+  mtrace ();
+
+  /* Perform some operations which definitely will allocate some
+     memory.  */
+  fp = fopen (__FILE__, "r");
+  if (fp == NULL)
+    /* Shouldn't happen since this program is executed in the source
+       directory.  */
+    abort ();
+
+  while (!feof (fp))
+    {
+      char **p;
+      char *copy;
+      ssize_t n = getline (&line, &linelen, fp);
+
+      if (n < 0)
+	break;
+
+      if (n == 0)
+	continue;
+
+      copy = strdup (line);
+      if (copy == NULL)
+	abort ();
+
+      p = (char **) tsearch (copy, &root,
+			     (int (*) (const void *, const void *)) strcmp);
+      if (*p != copy)
+	/* This line wasn't added.  */
+	free (copy);
+    }
+
+  fclose (fp);
+
+  fp = fopen (_PATH_DEVNULL, "w");
+  if (fp != NULL)
+    {
+      /* Write something through stdout.  */
+      twalk (root, print);
+
+      fclose (fp);
+    }
+
+  /* Free everything.  */
+  tdestroy (root, free);
+
+  /* Also the line buffer.  */
+  free (line);
+
+  /* That's it.  */
+  return 0;
+}
+
+
+static void
+print (const void *node, VISIT value, int level)
+{
+  static int cnt;
+  if (value == postorder || value == leaf)
+    fprintf (fp, "%3d: %s", ++cnt, *(const char **) node);
+}