Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / libsupc++ / eh_call.cc

diff --git a/libstdc++-v3/libsupc++/eh_call.cc b/libstdc++-v3/libsupc++/eh_call.cc
new file mode 100644 (file)
index 0000000..a737eb8
--- /dev/null
+++ b/libstdc++-v3/libsupc++/eh_call.cc
@@ -0,0 +1,157 @@
+// -*- C++ -*- Helpers for calling unextected and terminate
+// 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 <cstdlib>
+#include <exception_defines.h>
+#include "unwind-cxx.h"
+
+using namespace __cxxabiv1;
+
+#include "unwind-pe.h"
+
+
+// Helper routine for when the exception handling code needs to call
+// terminate.
+
+extern "C" void
+__cxa_call_terminate(_Unwind_Exception* ue_header)
+{
+
+  if (ue_header)
+    {
+      // terminate is classed as a catch handler.
+      __cxa_begin_catch(ue_header);
+
+      // Call the terminate handler that was in effect when we threw this
+      // exception.  */
+      if (__is_gxx_exception_class(ue_header->exception_class))
+       {
+         __cxa_exception* xh;
+
+         xh = __get_exception_header_from_ue(ue_header);
+         __terminate(xh->terminateHandler);
+       }
+    }
+  /* Call the global routine if we don't have anything better.  */
+  std::terminate();
+}
+
+
+#ifdef __ARM_EABI_UNWINDER__
+// The ARM EABI __cxa_call_unexpected has the same semantics as the generic
+// routine, but the exception specification has a different format.
+extern "C" void
+__cxa_call_unexpected(void* exc_obj_in)
+{
+  _Unwind_Exception* exc_obj
+    = reinterpret_cast<_Unwind_Exception*>(exc_obj_in);
+
+  int rtti_count = 0;
+  _Unwind_Word rtti_stride = 0;
+  _Unwind_Word* rtti_list = NULL;
+  bool foreign_exception;
+  std::unexpected_handler unexpectedHandler = NULL;
+  std::terminate_handler terminateHandler = NULL;
+  __cxa_exception* xh;
+  if (__is_gxx_exception_class(exc_obj->exception_class))
+    {
+      // Save data from the EO, which may be clobbered by _cxa_begin_catch.
+      xh = __get_exception_header_from_ue(exc_obj);
+      unexpectedHandler = xh->unexpectedHandler;
+      terminateHandler = xh->terminateHandler;
+      rtti_count = exc_obj->barrier_cache.bitpattern[1];
+
+      rtti_stride = exc_obj->barrier_cache.bitpattern[3];
+      rtti_list = (_Unwind_Word*) exc_obj->barrier_cache.bitpattern[4];
+      foreign_exception = false;
+    }
+  else
+    foreign_exception = true;
+
+  /* This must be called after extracting data from the EO, but before
+     calling unexpected().   */
+  __cxa_begin_catch(exc_obj);
+
+  // This function is a handler for our exception argument.  If we exit
+  // by throwing a different exception, we'll need the original cleaned up.
+  struct end_catch_protect
+  {
+    end_catch_protect() { }
+    ~end_catch_protect() { __cxa_end_catch(); }
+  } end_catch_protect_obj;
+
+
+  __try 
+    { 
+      if (foreign_exception)
+       std::unexpected();
+      else
+       __unexpected(unexpectedHandler);
+    }
+  __catch(...) 
+    {
+      /* See if the new exception matches the rtti list.  */
+      if (foreign_exception)
+       std::terminate();
+
+      // Get the exception thrown from unexpected.
+
+      __cxa_eh_globals* globals = __cxa_get_globals_fast();
+      __cxa_exception* new_xh = globals->caughtExceptions;
+      void* new_ptr = __get_object_from_ambiguous_exception (new_xh);
+      const std::type_info* catch_type;
+      int n;
+      bool bad_exception_allowed = false;
+      const std::type_info& bad_exc = typeid(std::bad_exception);
+
+      // Check the new exception against the rtti list
+      for (n = 0; n < rtti_count; n++)
+       {
+         _Unwind_Word offset;
+
+         offset = (_Unwind_Word) &rtti_list[n * (rtti_stride >> 2)];
+         offset = _Unwind_decode_target2(offset);
+         catch_type = (const std::type_info*) (offset);
+
+         if (__cxa_type_match(&new_xh->unwindHeader, catch_type, false,
+                              &new_ptr) != ctm_failed)
+           __throw_exception_again;
+
+         if (catch_type->__do_catch(&bad_exc, 0, 1))
+           bad_exception_allowed = true;
+       }
+
+      // If the exception spec allows std::bad_exception, throw that.
+#ifdef __EXCEPTIONS  
+      if (bad_exception_allowed)
+       throw std::bad_exception();
+#endif   
+
+      // Otherwise, die.
+      __terminate(terminateHandler);
+    }
+}
+#endif // __ARM_EABI_UNWINDER__