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diff --git a/gcc-4.9/libvtv/vtv_fail.h b/gcc-4.9/libvtv/vtv_fail.h
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+// Copyright (C) 2012-2013
+// Free Software Foundation
+//
+// This file is part of GCC.
+//
+// GCC 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.
+
+// GCC 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+#ifndef _VTV_FAIL_H
+#define _VTV_FAIL_H 1
+
+/* __vtv_really_fail prints a backtrace and a memory dump, then calls
+ abort. It is here for programmers to call, presumably from
+ __vtv_verify_fail, if they choose to overwrite the standard
+ __vtv_verify_fail with one of their own. Programmers should NOT
+ attempt to rewrite __vtv_really_fail. */
+
+extern void
+__vtv_really_fail (const char *fail_msg)
+ __attribute__ ((visibility ("default"), noreturn, nothrow));
+
+/* __vtv_verify_fail is the function that gets called if the vtable
+ verification code discovers a vtable pointer that it cannot verify
+ as valid. Normally __vtv_verify_fail calls __vtv_really_fail.
+ However programmers can write and link in their own version of
+ __vtv_verify_fail, if they wish to do some kind of secondary
+ verification, for example. The main verification code assumes that
+ IF __vtv_verify_fail returns, then some kind of secondary
+ verification was done AND that the secondary verification succeeded,
+ i.e. that the vtable pointer is actually valid and ok to use. If
+ the secondary verification fails, then __vtv_verify_fail should not
+ return. */
+
+extern void
+__vtv_verify_fail (void **data_set_ptr, const void *vtbl_pointer)
+ __attribute__((visibility ("default"), nothrow));
+
+extern void
+__vtv_verify_fail_debug (void **data_set_ptr, const void *vtbl_pointer,
+ const char *debug_msg)
+ __attribute__((visibility ("default"), nothrow));
+
+#endif /* _VTV_FAIL_H */