obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

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.

1 files changed, 419 insertions, 0 deletions

diff --git a/libstdc++-v3/libsupc++/unwind-cxx.h b/libstdc++-v3/libsupc++/unwind-cxx.h
new file mode 100644
index 000000000..e62ea7c38
--- /dev/null
+++ b/libstdc++-v3/libsupc++/unwind-cxx.h
@@ -0,0 +1,419 @@
+// -*- C++ -*- Exception handling and frame unwind runtime interface routines.
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+// 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/>.
+
+// This is derived from the C++ ABI for IA-64.  Where we diverge
+// for cross-architecture compatibility are noted with "@@@".
+
+#ifndef _UNWIND_CXX_H
+#define _UNWIND_CXX_H 1
+
+// Level 2: C++ ABI
+
+#include <typeinfo>
+#include <exception>
+#include <cstddef>
+#include "unwind.h"
+#include <bits/atomic_word.h>
+
+#pragma GCC visibility push(default)
+
+namespace __cxxabiv1
+{
+
+// A primary C++ exception object consists of a header, which is a wrapper
+// around an unwind object header with additional C++ specific information,
+// followed by the exception object itself.
+
+struct __cxa_exception
+{
+  // Manage the exception object itself.
+  std::type_info *exceptionType;
+  void (*exceptionDestructor)(void *); 
+
+  // The C++ standard has entertaining rules wrt calling set_terminate
+  // and set_unexpected in the middle of the exception cleanup process.
+  std::unexpected_handler unexpectedHandler;
+  std::terminate_handler terminateHandler;
+
+  // The caught exception stack threads through here.
+  __cxa_exception *nextException;
+
+  // How many nested handlers have caught this exception.  A negated
+  // value is a signal that this object has been rethrown.
+  int handlerCount;
+
+#ifdef __ARM_EABI_UNWINDER__
+  // Stack of exceptions in cleanups.
+  __cxa_exception* nextPropagatingException;
+
+  // The nuber of active cleanup handlers for this exception.
+  int propagationCount;
+#else
+  // Cache parsed handler data from the personality routine Phase 1
+  // for Phase 2 and __cxa_call_unexpected.
+  int handlerSwitchValue;
+  const unsigned char *actionRecord;
+  const unsigned char *languageSpecificData;
+  _Unwind_Ptr catchTemp;
+  void *adjustedPtr;
+#endif
+
+  // The generic exception header.  Must be last.
+  _Unwind_Exception unwindHeader;
+};
+
+struct __cxa_refcounted_exception
+{
+  // Manage this header.
+  _Atomic_word referenceCount;
+  // __cxa_exception must be last, and no padding can be after it.
+  __cxa_exception exc;
+};
+
+// A dependent C++ exception object consists of a wrapper around an unwind
+// object header with additional C++ specific information, containing a pointer
+// to a primary exception object.
+
+struct __cxa_dependent_exception
+{
+  // The primary exception this thing depends on.
+  void *primaryException;
+
+  // The C++ standard has entertaining rules wrt calling set_terminate
+  // and set_unexpected in the middle of the exception cleanup process.
+  std::unexpected_handler unexpectedHandler;
+  std::terminate_handler terminateHandler;
+
+  // The caught exception stack threads through here.
+  __cxa_exception *nextException;
+
+  // How many nested handlers have caught this exception.  A negated
+  // value is a signal that this object has been rethrown.
+  int handlerCount;
+
+#ifdef __ARM_EABI_UNWINDER__
+  // Stack of exceptions in cleanups.
+  __cxa_exception* nextPropagatingException;
+
+  // The nuber of active cleanup handlers for this exception.
+  int propagationCount;
+#else
+  // Cache parsed handler data from the personality routine Phase 1
+  // for Phase 2 and __cxa_call_unexpected.
+  int handlerSwitchValue;
+  const unsigned char *actionRecord;
+  const unsigned char *languageSpecificData;
+  _Unwind_Ptr catchTemp;
+  void *adjustedPtr;
+#endif
+
+  // The generic exception header.  Must be last.
+  _Unwind_Exception unwindHeader;
+};
+
+// Each thread in a C++ program has access to a __cxa_eh_globals object.
+struct __cxa_eh_globals
+{
+  __cxa_exception *caughtExceptions;
+  unsigned int uncaughtExceptions;
+#ifdef __ARM_EABI_UNWINDER__
+  __cxa_exception* propagatingExceptions;
+#endif
+};
+
+
+// The __cxa_eh_globals for the current thread can be obtained by using
+// either of the following functions.  The "fast" version assumes at least
+// one prior call of __cxa_get_globals has been made from the current
+// thread, so no initialization is necessary.
+extern "C" __cxa_eh_globals *__cxa_get_globals () throw() 
+  __attribute__ ((__const__));
+extern "C" __cxa_eh_globals *__cxa_get_globals_fast () throw() 
+  __attribute__ ((__const__));
+
+// Allocate memory for the primary exception plus the thrown object.
+extern "C" void *__cxa_allocate_exception(std::size_t thrown_size) throw();
+
+// Free the space allocated for the primary exception.
+extern "C" void __cxa_free_exception(void *thrown_exception) throw();
+
+// Allocate memory for a dependent exception.
+extern "C" __cxa_dependent_exception*
+__cxa_allocate_dependent_exception() throw();
+
+// Free the space allocated for the dependent exception.
+extern "C" void
+__cxa_free_dependent_exception(__cxa_dependent_exception *ex) throw();
+
+// Throw the exception.
+extern "C" void __cxa_throw (void *thrown_exception,
+			     std::type_info *tinfo,
+			     void (*dest) (void *))
+  __attribute__((__noreturn__));
+
+// Used to implement exception handlers.
+extern "C" void *__cxa_get_exception_ptr (void *) throw()
+  __attribute__ ((__pure__));
+extern "C" void *__cxa_begin_catch (void *) throw();
+extern "C" void __cxa_end_catch ();
+extern "C" void __cxa_rethrow () __attribute__((__noreturn__));
+
+// These facilitate code generation for recurring situations.
+extern "C" void __cxa_bad_cast () __attribute__((__noreturn__));
+extern "C" void __cxa_bad_typeid () __attribute__((__noreturn__));
+
+// @@@ These are not directly specified by the IA-64 C++ ABI.
+
+// Handles re-checking the exception specification if unexpectedHandler
+// throws, and if bad_exception needs to be thrown.  Called from the
+// compiler.
+extern "C" void __cxa_call_unexpected (void *) __attribute__((__noreturn__));
+extern "C" void __cxa_call_terminate (_Unwind_Exception*) throw ()
+  __attribute__((__noreturn__));
+
+#ifdef __ARM_EABI_UNWINDER__
+// Arm EABI specified routines.
+typedef enum {
+  ctm_failed = 0,
+  ctm_succeeded = 1,
+  ctm_succeeded_with_ptr_to_base = 2
+} __cxa_type_match_result;
+extern "C" __cxa_type_match_result __cxa_type_match(_Unwind_Exception*,
+						    const std::type_info*,
+						    bool, void**);
+extern "C" bool __cxa_begin_cleanup (_Unwind_Exception*);
+extern "C" void __cxa_end_cleanup (void);
+#endif
+
+// Invokes given handler, dying appropriately if the user handler was
+// so inconsiderate as to return.
+extern void __terminate(std::terminate_handler) throw () 
+  __attribute__((__noreturn__));
+extern void __unexpected(std::unexpected_handler)
+  __attribute__((__noreturn__));
+
+// The current installed user handlers.
+extern std::terminate_handler __terminate_handler;
+extern std::unexpected_handler __unexpected_handler;
+
+// These are explicitly GNU C++ specific.
+
+// Acquire the C++ exception header from the C++ object.
+static inline __cxa_exception *
+__get_exception_header_from_obj (void *ptr)
+{
+  return reinterpret_cast<__cxa_exception *>(ptr) - 1;
+}
+
+// Acquire the C++ exception header from the generic exception header.
+static inline __cxa_exception *
+__get_exception_header_from_ue (_Unwind_Exception *exc)
+{
+  return reinterpret_cast<__cxa_exception *>(exc + 1) - 1;
+}
+
+// Acquire the C++ refcounted exception header from the C++ object.
+static inline __cxa_refcounted_exception *
+__get_refcounted_exception_header_from_obj (void *ptr)
+{
+  return reinterpret_cast<__cxa_refcounted_exception *>(ptr) - 1;
+}
+
+// Acquire the C++ refcounted exception header from the generic exception
+// header.
+static inline __cxa_refcounted_exception *
+__get_refcounted_exception_header_from_ue (_Unwind_Exception *exc)
+{
+  return reinterpret_cast<__cxa_refcounted_exception *>(exc + 1) - 1;
+}
+
+static inline __cxa_dependent_exception *
+__get_dependent_exception_from_ue (_Unwind_Exception *exc)
+{
+  return reinterpret_cast<__cxa_dependent_exception *>(exc + 1) - 1;
+}
+
+#ifdef __ARM_EABI_UNWINDER__
+static inline bool
+__is_gxx_exception_class(_Unwind_Exception_Class c)
+{
+  // TODO: Take advantage of the fact that c will always be word aligned.
+  return c[0] == 'G'
+	 && c[1] == 'N'
+	 && c[2] == 'U'
+	 && c[3] == 'C'
+	 && c[4] == 'C'
+	 && c[5] == '+'
+	 && c[6] == '+'
+	 && (c[7] == '\0' || c[7] == '\x01');
+}
+
+// Only checks for primary or dependent, but not that it is a C++ exception at
+// all.
+static inline bool
+__is_dependent_exception(_Unwind_Exception_Class c)
+{
+  return c[7] == '\x01';
+}
+
+static inline void
+__GXX_INIT_PRIMARY_EXCEPTION_CLASS(_Unwind_Exception_Class c)
+{
+  c[0] = 'G';
+  c[1] = 'N';
+  c[2] = 'U';
+  c[3] = 'C';
+  c[4] = 'C';
+  c[5] = '+';
+  c[6] = '+';
+  c[7] = '\0';
+}
+
+static inline void
+__GXX_INIT_DEPENDENT_EXCEPTION_CLASS(_Unwind_Exception_Class c)
+{
+  c[0] = 'G';
+  c[1] = 'N';
+  c[2] = 'U';
+  c[3] = 'C';
+  c[4] = 'C';
+  c[5] = '+';
+  c[6] = '+';
+  c[7] = '\x01';
+}
+
+static inline bool
+__is_gxx_forced_unwind_class(_Unwind_Exception_Class c)
+{
+  return c[0] == 'G'
+	 && c[1] == 'N'
+	 && c[2] == 'U'
+	 && c[3] == 'C'
+	 && c[4] == 'F'
+	 && c[5] == 'O'
+	 && c[6] == 'R'
+	 && c[7] == '\0';
+}
+
+static inline void
+__GXX_INIT_FORCED_UNWIND_CLASS(_Unwind_Exception_Class c)
+{
+  c[0] = 'G';
+  c[1] = 'N';
+  c[2] = 'U';
+  c[3] = 'C';
+  c[4] = 'F';
+  c[5] = 'O';
+  c[6] = 'R';
+  c[7] = '\0';
+}
+
+static inline void*
+__gxx_caught_object(_Unwind_Exception* eo)
+{
+  return (void*)eo->barrier_cache.bitpattern[0];
+}
+#else // !__ARM_EABI_UNWINDER__
+// This is the primary exception class we report -- "GNUCC++\0".
+const _Unwind_Exception_Class __gxx_primary_exception_class
+= ((((((((_Unwind_Exception_Class) 'G' 
+	 << 8 | (_Unwind_Exception_Class) 'N')
+	<< 8 | (_Unwind_Exception_Class) 'U')
+       << 8 | (_Unwind_Exception_Class) 'C')
+      << 8 | (_Unwind_Exception_Class) 'C')
+     << 8 | (_Unwind_Exception_Class) '+')
+    << 8 | (_Unwind_Exception_Class) '+')
+   << 8 | (_Unwind_Exception_Class) '\0');
+
+// This is the dependent (from std::rethrow_exception) exception class we report
+// "GNUCC++\x01"
+const _Unwind_Exception_Class __gxx_dependent_exception_class
+= ((((((((_Unwind_Exception_Class) 'G' 
+	 << 8 | (_Unwind_Exception_Class) 'N')
+	<< 8 | (_Unwind_Exception_Class) 'U')
+       << 8 | (_Unwind_Exception_Class) 'C')
+      << 8 | (_Unwind_Exception_Class) 'C')
+     << 8 | (_Unwind_Exception_Class) '+')
+    << 8 | (_Unwind_Exception_Class) '+')
+   << 8 | (_Unwind_Exception_Class) '\x01');
+
+static inline bool
+__is_gxx_exception_class(_Unwind_Exception_Class c)
+{
+  return c == __gxx_primary_exception_class
+      || c == __gxx_dependent_exception_class;
+}
+
+// Only checks for primary or dependent, but not that it is a C++ exception at
+// all.
+static inline bool
+__is_dependent_exception(_Unwind_Exception_Class c)
+{
+  return (c & 1);
+}
+
+#define __GXX_INIT_PRIMARY_EXCEPTION_CLASS(c) c = __gxx_primary_exception_class
+#define __GXX_INIT_DEPENDENT_EXCEPTION_CLASS(c) \
+  c = __gxx_dependent_exception_class
+
+// GNU C++ personality routine, Version 0.
+extern "C" _Unwind_Reason_Code __gxx_personality_v0
+     (int, _Unwind_Action, _Unwind_Exception_Class,
+      struct _Unwind_Exception *, struct _Unwind_Context *);
+
+// GNU C++ sjlj personality routine, Version 0.
+extern "C" _Unwind_Reason_Code __gxx_personality_sj0
+     (int, _Unwind_Action, _Unwind_Exception_Class,
+      struct _Unwind_Exception *, struct _Unwind_Context *);
+
+static inline void*
+__gxx_caught_object(_Unwind_Exception* eo)
+{
+  // Bad as it looks, this actually works for dependent exceptions too.
+  __cxa_exception* header = __get_exception_header_from_ue (eo);
+  return header->adjustedPtr;
+}
+#endif // !__ARM_EABI_UNWINDER__
+
+static inline void*
+__get_object_from_ue(_Unwind_Exception* eo) throw()
+{
+  return __is_dependent_exception (eo->exception_class) ?
+    __get_dependent_exception_from_ue (eo)->primaryException :
+    eo + 1;
+}
+
+static inline void *
+__get_object_from_ambiguous_exception(__cxa_exception *p_or_d) throw()
+{
+	return __get_object_from_ue (&p_or_d->unwindHeader);
+}
+
+
+} /* namespace __cxxabiv1 */
+
+#pragma GCC visibility pop
+
+#endif // _UNWIND_CXX_H