1 files changed, 106 insertions, 0 deletions
diff --git a/contrib/libstdc++/libsupc++/eh_catch.cc b/contrib/libstdc++/libsupc++/eh_catch.cc
new file mode 100644
index 0000000..ba49dfe
--- /dev/null
+++ b/contrib/libstdc++/libsupc++/eh_catch.cc
@@ -0,0 +1,106 @@
+// -*- C++ -*- Exception handling routines for catching.
+// Copyright (C) 2001 Free Software Foundation, Inc.
+//
+// This file is part of GNU CC.
+//
+// GNU CC 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 2, or (at your option)
+// any later version.
+//
+// GNU CC 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 GNU CC; see the file COPYING.  If not, write to
+// the Free Software Foundation, 59 Temple Place - Suite 330,
+// Boston, MA 02111-1307, USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+
+#include <cstdlib>
+#include "unwind-cxx.h"
+
+using namespace __cxxabiv1;
+
+
+extern "C" void *
+__cxa_begin_catch (void *exc_obj_in)
+{
+  _Unwind_Exception *exceptionObject
+    = reinterpret_cast <_Unwind_Exception *>(exc_obj_in);
+
+  // ??? Foreign exceptions can't be stacked here, and there doesn't
+  // appear to be any place to store for __cxa_end_catch to destroy.
+
+  __cxa_exception *header = __get_exception_header_from_ue (exceptionObject);
+  __cxa_eh_globals *globals = __cxa_get_globals ();
+  __cxa_exception *prev = globals->caughtExceptions;
+  int count = header->handlerCount;
+
+  if (count < 0)
+    // This exception was rethrown from an immediately enclosing region.
+    count = -count + 1;
+  else
+    count += 1;
+  header->handlerCount = count;
+
+  globals->uncaughtExceptions -= 1;
+  if (header != prev)
+    {
+      header->nextException = prev;
+      globals->caughtExceptions = header;
+    }
+
+  return header->adjustedPtr;
+}
+
+
+extern "C" void
+__cxa_end_catch ()
+{
+  __cxa_eh_globals *globals = __cxa_get_globals_fast ();
+  __cxa_exception *header = globals->caughtExceptions;
+  int count = header->handlerCount;
+
+  if (count < 0)
+    {
+      // This exception was rethrown.  Decrement the (inverted) catch
+      // count and remove it from the chain when it reaches zero.
+      if (++count == 0)
+	{
+	  globals->uncaughtExceptions += 1;
+	  globals->caughtExceptions = header->nextException;
+	}
+    }
+  else if (--count == 0)
+    {
+      // Handling for this exception is complete.  Destroy the object.
+      globals->caughtExceptions = header->nextException;
+      _Unwind_DeleteException (&header->unwindHeader);
+      return;
+    }
+  else if (count < 0)
+    // A bug in the exception handling library or compiler.
+    std::abort ();
+
+  header->handlerCount = count;
+}
+
+
+bool
+std::uncaught_exception() throw()
+{
+  __cxa_eh_globals *globals = __cxa_get_globals ();
+  return globals->uncaughtExceptions != 0;
+}