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1 | // -*- C++ -*- Exception handling routines for throwing. |
2 | // Copyright (C) 2001 Free Software Foundation, Inc. | |
3 | // | |
4 | // This file is part of GNU CC. | |
5 | // | |
6 | // GNU CC 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) | |
9 | // any later version. | |
10 | // | |
11 | // GNU CC 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. | |
15 | // | |
16 | // You should have received a copy of the GNU General Public License | |
17 | // along with GNU CC; see the file COPYING. If not, write to | |
18 | // the Free Software Foundation, 59 Temple Place - Suite 330, | |
19 | // Boston, MA 02111-1307, USA. | |
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 | ||
34 | ||
35 | using namespace __cxxabiv1; | |
36 | ||
37 | ||
38 | static void | |
39 | __gxx_exception_cleanup (_Unwind_Reason_Code code, _Unwind_Exception *exc) | |
40 | { | |
41 | __cxa_exception *header = __get_exception_header_from_ue (exc); | |
42 | ||
c5504edb | 43 | // If we haven't been caught by a foreign handler, then this is |
52a11cbf | 44 | // some sort of unwind error. In that case just die immediately. |
cb94b155 SE |
45 | // _Unwind_DeleteException in the HP-UX IA64 libunwind library |
46 | // returns _URC_NO_REASON and not _URC_FOREIGN_EXCEPTION_CAUGHT | |
47 | // like the GCC _Unwind_DeleteException function does. | |
48 | if (code != _URC_FOREIGN_EXCEPTION_CAUGHT && code != _URC_NO_REASON) | |
52a11cbf RH |
49 | __terminate (header->terminateHandler); |
50 | ||
51 | if (header->exceptionDestructor) | |
52 | header->exceptionDestructor (header + 1); | |
53 | ||
54 | __cxa_free_exception (header + 1); | |
55 | } | |
56 | ||
57 | ||
58 | extern "C" void | |
59 | __cxa_throw (void *obj, std::type_info *tinfo, void (*dest) (void *)) | |
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; | |
66 | header->unwindHeader.exception_class = __gxx_exception_class; | |
67 | header->unwindHeader.exception_cleanup = __gxx_exception_cleanup; | |
68 | ||
69 | __cxa_eh_globals *globals = __cxa_get_globals (); | |
70 | globals->uncaughtExceptions += 1; | |
71 | ||
72 | #ifdef _GLIBCPP_SJLJ_EXCEPTIONS | |
73 | _Unwind_SjLj_RaiseException (&header->unwindHeader); | |
74 | #else | |
75 | _Unwind_RaiseException (&header->unwindHeader); | |
76 | #endif | |
77 | ||
78 | // Some sort of unwinding error. Note that terminate is a handler. | |
79 | __cxa_begin_catch (&header->unwindHeader); | |
80 | std::terminate (); | |
81 | } | |
82 | ||
83 | extern "C" void | |
84 | __cxa_rethrow () | |
85 | { | |
86 | __cxa_eh_globals *globals = __cxa_get_globals (); | |
87 | __cxa_exception *header = globals->caughtExceptions; | |
88 | ||
89 | // Watch for luser rethrowing with no active exception. | |
90 | if (header) | |
91 | { | |
92 | // Tell __cxa_end_catch this is a rethrow. | |
93 | header->handlerCount = -header->handlerCount; | |
94 | ||
95 | #ifdef _GLIBCPP_SJLJ_EXCEPTIONS | |
96 | _Unwind_SjLj_RaiseException (&header->unwindHeader); | |
97 | #else | |
98 | _Unwind_RaiseException (&header->unwindHeader); | |
99 | #endif | |
100 | ||
101 | // Some sort of unwinding error. Note that terminate is a handler. | |
102 | __cxa_begin_catch (&header->unwindHeader); | |
103 | } | |
104 | std::terminate (); | |
105 | } |