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52a11cbf | 1 | // -*- C++ -*- Exception handling routines for throwing. |
a944ceb9 | 2 | // Copyright (C) 2001, 2003 Free Software Foundation, Inc. |
52a11cbf | 3 | // |
cbecceb9 | 4 | // This file is part of GCC. |
52a11cbf | 5 | // |
cbecceb9 | 6 | // GCC is free software; you can redistribute it and/or modify |
52a11cbf RH |
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) | |
9 | // any later version. | |
10 | // | |
cbecceb9 | 11 | // GCC is distributed in the hope that it will be useful, |
52a11cbf RH |
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. | |
15 | // | |
16 | // You should have received a copy of the GNU General Public License | |
cbecceb9 | 17 | // along with GCC; see the file COPYING. If not, write to |
83f51799 KC |
18 | // the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
19 | // Boston, MA 02110-1301, USA. | |
52a11cbf RH |
20 | |
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. | |
29 | ||
30 | ||
31 | #include <bits/c++config.h> | |
32 | #include "unwind-cxx.h" | |
33 | ||
52a11cbf RH |
34 | using namespace __cxxabiv1; |
35 | ||
36 | ||
37 | static void | |
38 | __gxx_exception_cleanup (_Unwind_Reason_Code code, _Unwind_Exception *exc) | |
39 | { | |
40 | __cxa_exception *header = __get_exception_header_from_ue (exc); | |
41 | ||
c5504edb | 42 | // If we haven't been caught by a foreign handler, then this is |
52a11cbf | 43 | // some sort of unwind error. In that case just die immediately. |
cb94b155 SE |
44 | // _Unwind_DeleteException in the HP-UX IA64 libunwind library |
45 | // returns _URC_NO_REASON and not _URC_FOREIGN_EXCEPTION_CAUGHT | |
46 | // like the GCC _Unwind_DeleteException function does. | |
47 | if (code != _URC_FOREIGN_EXCEPTION_CAUGHT && code != _URC_NO_REASON) | |
52a11cbf RH |
48 | __terminate (header->terminateHandler); |
49 | ||
50 | if (header->exceptionDestructor) | |
51 | header->exceptionDestructor (header + 1); | |
52 | ||
53 | __cxa_free_exception (header + 1); | |
54 | } | |
55 | ||
56 | ||
57 | extern "C" void | |
723acbd5 MM |
58 | __cxxabiv1::__cxa_throw (void *obj, std::type_info *tinfo, |
59 | void (*dest) (void *)) | |
52a11cbf RH |
60 | { |
61 | __cxa_exception *header = __get_exception_header_from_obj (obj); | |
62 | header->exceptionType = tinfo; | |
63 | header->exceptionDestructor = dest; | |
64 | header->unexpectedHandler = __unexpected_handler; | |
65 | header->terminateHandler = __terminate_handler; | |
617a1b71 | 66 | __GXX_INIT_EXCEPTION_CLASS(header->unwindHeader.exception_class); |
52a11cbf RH |
67 | header->unwindHeader.exception_cleanup = __gxx_exception_cleanup; |
68 | ||
3d7c150e | 69 | #ifdef _GLIBCXX_SJLJ_EXCEPTIONS |
52a11cbf RH |
70 | _Unwind_SjLj_RaiseException (&header->unwindHeader); |
71 | #else | |
72 | _Unwind_RaiseException (&header->unwindHeader); | |
73 | #endif | |
74 | ||
75 | // Some sort of unwinding error. Note that terminate is a handler. | |
76 | __cxa_begin_catch (&header->unwindHeader); | |
77 | std::terminate (); | |
78 | } | |
79 | ||
80 | extern "C" void | |
723acbd5 | 81 | __cxxabiv1::__cxa_rethrow () |
52a11cbf RH |
82 | { |
83 | __cxa_eh_globals *globals = __cxa_get_globals (); | |
84 | __cxa_exception *header = globals->caughtExceptions; | |
85 | ||
39609077 RH |
86 | globals->uncaughtExceptions += 1; |
87 | ||
52a11cbf RH |
88 | // Watch for luser rethrowing with no active exception. |
89 | if (header) | |
90 | { | |
91 | // Tell __cxa_end_catch this is a rethrow. | |
617a1b71 | 92 | if (!__is_gxx_exception_class(header->unwindHeader.exception_class)) |
a944ceb9 RH |
93 | globals->caughtExceptions = 0; |
94 | else | |
95 | header->handlerCount = -header->handlerCount; | |
52a11cbf | 96 | |
3d7c150e | 97 | #ifdef _GLIBCXX_SJLJ_EXCEPTIONS |
a944ceb9 | 98 | _Unwind_SjLj_Resume_or_Rethrow (&header->unwindHeader); |
ed0d100f | 99 | #else |
617a1b71 | 100 | #if defined(_LIBUNWIND_STD_ABI) || defined (__ARM_EABI_UNWINDER__) |
ed0d100f | 101 | _Unwind_RaiseException (&header->unwindHeader); |
52a11cbf | 102 | #else |
a944ceb9 | 103 | _Unwind_Resume_or_Rethrow (&header->unwindHeader); |
ed0d100f | 104 | #endif |
52a11cbf RH |
105 | #endif |
106 | ||
107 | // Some sort of unwinding error. Note that terminate is a handler. | |
108 | __cxa_begin_catch (&header->unwindHeader); | |
109 | } | |
110 | std::terminate (); | |
111 | } |