Add missing peel_type.c test for commit f339da.

Signed-off-by: Mark Wielaard <mark@klomp.org>

diff --git a/tests/peel_type.c b/tests/peel_type.c
new file mode 100644 (file)
index 0000000..bccce32
--- /dev/null
+++ b/tests/peel_type.c
@@ -0,0 +1,119 @@
+/* Test program for dwarf_peel_type. Peels type of top-level vars.
+   Copyright (C) 2017 Red Hat, Inc.
+   This file is part of elfutils.
+
+   This file 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 of the License, or
+   (at your option) any later version.
+
+   elfutils 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, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <assert.h>
+#include <argp.h>
+#include <inttypes.h>
+#include <fcntl.h>
+#include ELFUTILS_HEADER(dw)
+#include ELFUTILS_HEADER(dwfl)
+#include <stdio.h>
+#include <unistd.h>
+#include <dwarf.h>
+
+#include "../libdw/known-dwarf.h"
+
+static const char *
+dwarf_tag_string (unsigned int tag)
+{
+  switch (tag)
+    {
+#define DWARF_ONE_KNOWN_DW_TAG(NAME, CODE) case CODE: return #NAME;
+      DWARF_ALL_KNOWN_DW_TAG
+#undef DWARF_ONE_KNOWN_DW_TAG
+    default:
+      return NULL;
+    }
+}
+
+void
+print_var_raw_type (Dwarf_Die *var)
+{
+  Dwarf_Attribute attr_mem;
+  Dwarf_Die type_mem;
+  Dwarf_Die *type;
+  const char *name = dwarf_diename (var);
+
+  type = dwarf_formref_die (dwarf_attr (var, DW_AT_type, &attr_mem),
+                           &type_mem);
+  if (type != NULL)
+    {
+      /* Test twice, once with a separate result DIE. Then with the
+        DIE itself. The resulting tag should be the same. */
+      Dwarf_Die result_mem;
+      Dwarf_Die *result = &result_mem;
+      int res = dwarf_peel_type (type, result);
+      if (res < 0)
+        printf ("%s error peeling type: %s\n", name, dwarf_errmsg (-1));
+      else if (res > 0)
+       printf ("%s missing DW_TAG_TYPE, could peel further: %s\n",
+               name, dwarf_tag_string (dwarf_tag (result)));
+      else
+       {
+         int tag = dwarf_tag (result);
+         printf ("%s raw type %s\n", name, dwarf_tag_string (tag));
+         res = dwarf_peel_type (type, type);
+         if (res < 0)
+           printf ("%s cannot peel type itself: %s\n", name,
+                   dwarf_errmsg (-1));
+         else if (res > 0)
+       printf ("%s missing DW_TAG_TYPE, could peel type further: %s\n",
+               name, dwarf_tag_string (dwarf_tag (type)));
+         else if (dwarf_tag (type) != tag)
+           printf ("%s doesn't resolve the same: %s != %s\n", name,
+                   dwarf_tag_string (tag),
+                   dwarf_tag_string (dwarf_tag (type)));
+       }
+    }
+  else
+    printf ("%s has no type.\n", name);
+}
+
+int
+main (int argc, char *argv[])
+{
+
+  int remaining;
+  Dwfl *dwfl;
+  (void) argp_parse (dwfl_standard_argp (), argc, argv, 0, &remaining,
+                     &dwfl);
+  assert (dwfl != NULL);
+
+  Dwarf_Die *cu = NULL;
+  Dwarf_Addr dwbias;
+  while ((cu = dwfl_nextcu (dwfl, cu, &dwbias)) != NULL)
+    {
+      Dwarf_Die die_mem;
+      Dwarf_Die *die = &die_mem;
+      dwarf_child (cu, &die_mem);
+
+      while (1)
+       {
+         if (dwarf_tag (die) == DW_TAG_variable)
+           print_var_raw_type (die);
+
+         if (dwarf_siblingof (die, &die_mem) != 0)
+           break;
+       }
+    }
+
+  dwfl_end (dwfl);
+}