Line | Count | Source (jump to first uncovered line) |
1 | | /* gmp_errno, __gmp_exception -- exception handling and reporting. |
2 | | |
3 | | THE FUNCTIONS IN THIS FILE, APART FROM gmp_errno, ARE FOR INTERNAL USE |
4 | | ONLY. THEY'RE ALMOST CERTAIN TO BE SUBJECT TO INCOMPATIBLE CHANGES OR |
5 | | DISAPPEAR COMPLETELY IN FUTURE GNU MP RELEASES. |
6 | | |
7 | | Copyright 2000, 2001, 2003, 2021 Free Software Foundation, Inc. |
8 | | |
9 | | This file is part of the GNU MP Library. |
10 | | |
11 | | The GNU MP Library is free software; you can redistribute it and/or modify |
12 | | it under the terms of either: |
13 | | |
14 | | * the GNU Lesser General Public License as published by the Free |
15 | | Software Foundation; either version 3 of the License, or (at your |
16 | | option) any later version. |
17 | | |
18 | | or |
19 | | |
20 | | * the GNU General Public License as published by the Free Software |
21 | | Foundation; either version 2 of the License, or (at your option) any |
22 | | later version. |
23 | | |
24 | | or both in parallel, as here. |
25 | | |
26 | | The GNU MP Library is distributed in the hope that it will be useful, but |
27 | | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
28 | | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
29 | | for more details. |
30 | | |
31 | | You should have received copies of the GNU General Public License and the |
32 | | GNU Lesser General Public License along with the GNU MP Library. If not, |
33 | | see https://www.gnu.org/licenses/. */ |
34 | | |
35 | | #include <stdlib.h> |
36 | | |
37 | | #include <signal.h> |
38 | | |
39 | | #include "gmp-impl.h" |
40 | | |
41 | | int gmp_errno = 0; |
42 | | |
43 | | |
44 | | /* Use SIGFPE on systems which have it. Otherwise, deliberate divide |
45 | | by zero, which triggers an exception on most systems. On those |
46 | | where it doesn't, for example power and powerpc, use abort instead. */ |
47 | | void |
48 | | __gmp_exception (int error_bit) |
49 | 0 | { |
50 | 0 | gmp_errno |= error_bit; |
51 | 0 | #ifdef SIGFPE |
52 | 0 | raise (SIGFPE); |
53 | | #else |
54 | | __gmp_junk = 10 / __gmp_0; |
55 | | #endif |
56 | 0 | abort (); |
57 | 0 | } |
58 | | |
59 | | |
60 | | /* These functions minimize the amount of code required in functions raising |
61 | | exceptions. Since they're "noreturn" and don't take any parameters, a |
62 | | test and call might even come out as a simple conditional jump. */ |
63 | | void |
64 | | __gmp_sqrt_of_negative (void) |
65 | 0 | { |
66 | 0 | __gmp_exception (GMP_ERROR_SQRT_OF_NEGATIVE); |
67 | 0 | } |
68 | | void |
69 | | __gmp_divide_by_zero (void) |
70 | 0 | { |
71 | 0 | __gmp_exception (GMP_ERROR_DIVISION_BY_ZERO); |
72 | 0 | } |
73 | | void |
74 | | __gmp_overflow_in_mpz (void) |
75 | 0 | { |
76 | 0 | __gmp_exception (GMP_ERROR_MPZ_OVERFLOW); |
77 | 0 | } |