From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified
 gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream
 tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
---
 libstdc++-v3/libsupc++/eh_throw.cc | 117 +++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 libstdc++-v3/libsupc++/eh_throw.cc

(limited to 'libstdc++-v3/libsupc++/eh_throw.cc')

diff --git a/libstdc++-v3/libsupc++/eh_throw.cc b/libstdc++-v3/libsupc++/eh_throw.cc
new file mode 100644
index 000000000..78cfc1395
--- /dev/null
+++ b/libstdc++-v3/libsupc++/eh_throw.cc
@@ -0,0 +1,117 @@
+// -*- C++ -*- Exception handling routines for throwing.
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+// Free Software Foundation, Inc.
+//
+// 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/>.
+
+#include <bits/c++config.h>
+#include "unwind-cxx.h"
+
+using namespace __cxxabiv1;
+
+
+static void
+__gxx_exception_cleanup (_Unwind_Reason_Code code, _Unwind_Exception *exc)
+{
+  // This cleanup is set only for primaries.
+  __cxa_refcounted_exception *header
+    = __get_refcounted_exception_header_from_ue (exc);
+
+  // We only want to be called through _Unwind_DeleteException.
+  // _Unwind_DeleteException in the HP-UX IA64 libunwind library
+  // returns _URC_NO_REASON and not _URC_FOREIGN_EXCEPTION_CAUGHT
+  // like the GCC _Unwind_DeleteException function does.
+  if (code != _URC_FOREIGN_EXCEPTION_CAUGHT && code != _URC_NO_REASON)
+    __terminate (header->exc.terminateHandler);
+
+#ifdef _GLIBCXX_ATOMIC_BUILTINS_4
+  if (__sync_sub_and_fetch (&header->referenceCount, 1) == 0)
+    {
+#endif
+      if (header->exc.exceptionDestructor)
+	header->exc.exceptionDestructor (header + 1);
+
+      __cxa_free_exception (header + 1);
+#ifdef _GLIBCXX_ATOMIC_BUILTINS_4
+    }
+#endif
+}
+
+
+extern "C" void
+__cxxabiv1::__cxa_throw (void *obj, std::type_info *tinfo, 
+			 void (*dest) (void *))
+{
+  // Definitely a primary.
+  __cxa_refcounted_exception *header
+    = __get_refcounted_exception_header_from_obj (obj);
+  header->referenceCount = 1;
+  header->exc.exceptionType = tinfo;
+  header->exc.exceptionDestructor = dest;
+  header->exc.unexpectedHandler = __unexpected_handler;
+  header->exc.terminateHandler = __terminate_handler;
+  __GXX_INIT_PRIMARY_EXCEPTION_CLASS(header->exc.unwindHeader.exception_class);
+  header->exc.unwindHeader.exception_cleanup = __gxx_exception_cleanup;
+
+#ifdef _GLIBCXX_SJLJ_EXCEPTIONS
+  _Unwind_SjLj_RaiseException (&header->exc.unwindHeader);
+#else
+  _Unwind_RaiseException (&header->exc.unwindHeader);
+#endif
+
+  // Some sort of unwinding error.  Note that terminate is a handler.
+  __cxa_begin_catch (&header->exc.unwindHeader);
+  std::terminate ();
+}
+
+extern "C" void
+__cxxabiv1::__cxa_rethrow ()
+{
+  __cxa_eh_globals *globals = __cxa_get_globals ();
+  __cxa_exception *header = globals->caughtExceptions;
+
+  globals->uncaughtExceptions += 1;
+
+  // Watch for luser rethrowing with no active exception.
+  if (header)
+    {
+      // Tell __cxa_end_catch this is a rethrow.
+      if (!__is_gxx_exception_class(header->unwindHeader.exception_class))
+	globals->caughtExceptions = 0;
+      else
+	header->handlerCount = -header->handlerCount;
+
+#ifdef _GLIBCXX_SJLJ_EXCEPTIONS
+      _Unwind_SjLj_Resume_or_Rethrow (&header->unwindHeader);
+#else
+#if defined(_LIBUNWIND_STD_ABI)
+      _Unwind_RaiseException (&header->unwindHeader);
+#else
+      _Unwind_Resume_or_Rethrow (&header->unwindHeader);
+#endif
+#endif
+  
+      // Some sort of unwinding error.  Note that terminate is a handler.
+      __cxa_begin_catch (&header->unwindHeader);
+    }
+  std::terminate ();
+}
-- 
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