1 files changed, 107 insertions, 0 deletions
diff --git a/elf/ifuncmain9.c b/elf/ifuncmain9.c
new file mode 100644
index 0000000000..a8a9c49dd1
--- /dev/null
+++ b/elf/ifuncmain9.c
@@ -0,0 +1,107 @@
+/* Test for IFUNC handling with local definitions.
+   Copyright (C) 2019 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* This test is based on gcc.dg/attr-ifunc-4.c.  */
+
+#include <config.h>
+
+#ifdef HAVE_GCC_IFUNC
+
+# include <stdbool.h>
+# include <stdio.h>
+
+/* Do not use the test framework, so that the process setup is not
+   disturbed.  */
+
+static volatile int implementation_called;
+static volatile int resolver_called;
+
+/* Just a random constant, to check that we called the right
+   function.  */
+enum { random_constant = 0x3a88d66d };
+
+static int
+implementation (void)
+{
+  ++implementation_called;
+  return random_constant;
+}
+
+static __typeof__ (implementation) *
+resolver (void)
+{
+  ++resolver_called;
+  return implementation;
+}
+
+static int magic (void) __attribute__ ((ifunc ("resolver")));
+
+int
+main (void)
+{
+  bool errors = false;
+
+  if (implementation_called != 0)
+    {
+      printf ("error: initial value of implementation_called is not zero:"
+              " %d\n", implementation_called);
+      errors = true;
+    }
+
+  /* This can be zero if the reference is bound lazily.  */
+  printf ("info: initial value of resolver_called: %d\n", resolver_called);
+
+  int magic_value = magic ();
+  if (magic_value != random_constant)
+    {
+      printf ("error: invalid magic value: 0x%x\n", magic_value);
+      errors = true;
+    }
+
+  printf ("info: resolver_called value: %d\n", resolver_called);
+  if (resolver_called == 0)
+    {
+      /* In theory, the resolver could be called multiple times if
+         several relocations are needed.  */
+      puts ("error: invalid resolver_called value (must not be zero)");
+      errors = true;
+    }
+
+  printf ("info: implementation_called value: %d\n", implementation_called);
+  if (implementation_called != 1)
+    {
+      puts ("error: invalid implementation_called value (must be 1)");
+      errors = true;
+    }
+
+  return errors;
+}
+
+#else  /* !HAVE_GCC_IFUNC */
+
+# include <support/check.h>
+
+static int
+do_test (void)
+{
+  FAIL_UNSUPPORTED ("GCC does not support the ifunc attribute");
+  return 1;                     /* Not reachable.  */
+}
+
+# include <support/test-driver.c>
+#endif