1 // -*- C++ -*- Exception handling routines for throwing.
2 // Copyright (C) 2001, 2003, 2008 Free Software Foundation, Inc.
4 // This file is part of GCC.
6 // GCC is free software; you can redistribute it and/or modify
7 // it under the terms of the GNU General Public License as published by
8 // the Free Software Foundation; either version 2, or (at your option)
11 // GCC is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with GCC; see the file COPYING. If not, write to
18 // the Free Software Foundation, 51 Franklin Street, Fifth Floor,
19 // Boston, MA 02110-1301, USA.
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
27 // invalidate any other reasons why the executable file might be covered by
28 // the GNU General Public License.
30 #include <bits/c++config.h>
31 #include "unwind-cxx.h"
33 using namespace __cxxabiv1
;
37 __gxx_exception_cleanup (_Unwind_Reason_Code code
, _Unwind_Exception
*exc
)
39 // This cleanup is set only for primaries.
40 __cxa_exception
*header
= __get_exception_header_from_ue (exc
);
42 // We only want to be called through _Unwind_DeleteException.
43 // _Unwind_DeleteException in the HP-UX IA64 libunwind library
44 // returns _URC_NO_REASON and not _URC_FOREIGN_EXCEPTION_CAUGHT
45 // like the GCC _Unwind_DeleteException function does.
46 if (code
!= _URC_FOREIGN_EXCEPTION_CAUGHT
&& code
!= _URC_NO_REASON
)
47 __terminate (header
->terminateHandler
);
49 if (__gnu_cxx::__exchange_and_add_dispatch (&header
->referenceCount
, -1) == 0)
51 if (header
->exceptionDestructor
)
52 header
->exceptionDestructor (header
+ 1);
54 __cxa_free_exception (header
+ 1);
60 __cxxabiv1::__cxa_throw (void *obj
, std::type_info
*tinfo
,
61 void (*dest
) (void *))
63 // Definitely a primary.
64 __cxa_exception
*header
= __get_exception_header_from_obj (obj
);
65 header
->referenceCount
= 0;
66 header
->exceptionType
= tinfo
;
67 header
->exceptionDestructor
= dest
;
68 header
->unexpectedHandler
= __unexpected_handler
;
69 header
->terminateHandler
= __terminate_handler
;
70 __GXX_INIT_PRIMARY_EXCEPTION_CLASS(header
->unwindHeader
.exception_class
);
71 header
->unwindHeader
.exception_cleanup
= __gxx_exception_cleanup
;
73 #ifdef _GLIBCXX_SJLJ_EXCEPTIONS
74 _Unwind_SjLj_RaiseException (&header
->unwindHeader
);
76 _Unwind_RaiseException (&header
->unwindHeader
);
79 // Some sort of unwinding error. Note that terminate is a handler.
80 __cxa_begin_catch (&header
->unwindHeader
);
85 __cxxabiv1::__cxa_rethrow ()
87 __cxa_eh_globals
*globals
= __cxa_get_globals ();
88 __cxa_exception
*header
= globals
->caughtExceptions
;
90 globals
->uncaughtExceptions
+= 1;
92 // Watch for luser rethrowing with no active exception.
95 // Tell __cxa_end_catch this is a rethrow.
96 if (!__is_gxx_exception_class(header
->unwindHeader
.exception_class
))
97 globals
->caughtExceptions
= 0;
99 header
->handlerCount
= -header
->handlerCount
;
101 #ifdef _GLIBCXX_SJLJ_EXCEPTIONS
102 _Unwind_SjLj_Resume_or_Rethrow (&header
->unwindHeader
);
104 #if defined(_LIBUNWIND_STD_ABI)
105 _Unwind_RaiseException (&header
->unwindHeader
);
107 _Unwind_Resume_or_Rethrow (&header
->unwindHeader
);
111 // Some sort of unwinding error. Note that terminate is a handler.
112 __cxa_begin_catch (&header
->unwindHeader
);