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1 | /* Support code for standard wait macros in gdb_wait.h. |
2 | ||
3 | Copyright (C) 2019 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "common-defs.h" | |
21 | ||
22 | #ifdef __MINGW32__ | |
23 | ||
24 | /* The underlying idea is that when a Windows program is terminated by | |
25 | a fatal exception, its exit code is the value of that exception, as | |
26 | defined by the various EXCEPTION_* symbols in the Windows API | |
27 | headers. We thus emulate WTERMSIG etc. by translating the fatal | |
28 | exception codes to more-or-less equivalent Posix signals. | |
29 | ||
30 | The translation below is not perfect, because a program could | |
31 | legitimately exit normally with a status whose value happens to | |
32 | have the high bits set, but that's extremely rare, to say the | |
33 | least, and it is deemed such a negligibly small probability of | |
34 | false positives is justified by the utility of reporting the | |
35 | terminating signal in the "normal" cases. */ | |
36 | ||
37 | # include "gdb/signals.h" /* for enum gdb_signal */ | |
38 | ||
39 | # define WIN32_LEAN_AND_MEAN | |
40 | # include <windows.h> /* for EXCEPTION_* constants */ | |
41 | ||
42 | struct xlate_status | |
43 | { | |
44 | /* The exit status (actually, fatal exception code). */ | |
45 | DWORD status; | |
46 | ||
47 | /* The corresponding signal value. */ | |
48 | int sig; | |
49 | }; | |
50 | ||
51 | int | |
52 | windows_status_to_termsig (unsigned long status) | |
53 | { | |
54 | static const xlate_status status_xlate_tbl[] = | |
55 | { | |
56 | {EXCEPTION_ACCESS_VIOLATION, SIGSEGV}, | |
57 | {EXCEPTION_IN_PAGE_ERROR, SIGSEGV}, | |
58 | {EXCEPTION_INVALID_HANDLE, SIGSEGV}, | |
59 | {EXCEPTION_ILLEGAL_INSTRUCTION, SIGILL}, | |
60 | {EXCEPTION_NONCONTINUABLE_EXCEPTION, SIGILL}, | |
61 | {EXCEPTION_ARRAY_BOUNDS_EXCEEDED, SIGSEGV}, | |
62 | {EXCEPTION_FLT_DENORMAL_OPERAND, SIGFPE}, | |
63 | {EXCEPTION_FLT_DIVIDE_BY_ZERO, SIGFPE}, | |
64 | {EXCEPTION_FLT_INEXACT_RESULT, SIGFPE}, | |
65 | {EXCEPTION_FLT_INVALID_OPERATION, SIGFPE}, | |
66 | {EXCEPTION_FLT_OVERFLOW, SIGFPE}, | |
67 | {EXCEPTION_FLT_STACK_CHECK, SIGFPE}, | |
68 | {EXCEPTION_FLT_UNDERFLOW, SIGFPE}, | |
69 | {EXCEPTION_INT_DIVIDE_BY_ZERO, SIGFPE}, | |
70 | {EXCEPTION_INT_OVERFLOW, SIGFPE}, | |
71 | {EXCEPTION_PRIV_INSTRUCTION, SIGILL}, | |
72 | {EXCEPTION_STACK_OVERFLOW, SIGSEGV}, | |
73 | {CONTROL_C_EXIT, SIGTERM} | |
74 | }; | |
75 | ||
76 | for (const xlate_status &x : status_xlate_tbl) | |
77 | if (x.status == status) | |
78 | return x.sig; | |
79 | ||
80 | return -1; | |
81 | } | |
82 | ||
83 | #endif /* __MINGW32__ */ |