| 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 | #include "gdb_wait.h" |
| 23 | |
| 24 | #ifdef __MINGW32__ |
| 25 | |
| 26 | /* The underlying idea is that when a Windows program is terminated by |
| 27 | a fatal exception, its exit code is the value of that exception, as |
| 28 | defined by the various EXCEPTION_* symbols in the Windows API |
| 29 | headers. We thus emulate WTERMSIG etc. by translating the fatal |
| 30 | exception codes to more-or-less equivalent Posix signals. |
| 31 | |
| 32 | The translation below is not perfect, because a program could |
| 33 | legitimately exit normally with a status whose value happens to |
| 34 | have the high bits set, but that's extremely rare, to say the |
| 35 | least, and it is deemed such a negligibly small probability of |
| 36 | false positives is justified by the utility of reporting the |
| 37 | terminating signal in the "normal" cases. */ |
| 38 | |
| 39 | # include <signal.h> |
| 40 | |
| 41 | # define WIN32_LEAN_AND_MEAN |
| 42 | # include <windows.h> /* for EXCEPTION_* constants */ |
| 43 | |
| 44 | struct xlate_status |
| 45 | { |
| 46 | /* The exit status (actually, fatal exception code). */ |
| 47 | DWORD status; |
| 48 | |
| 49 | /* The corresponding signal value. */ |
| 50 | int sig; |
| 51 | }; |
| 52 | |
| 53 | int |
| 54 | windows_status_to_termsig (unsigned long status) |
| 55 | { |
| 56 | static const xlate_status status_xlate_tbl[] = |
| 57 | { |
| 58 | {EXCEPTION_ACCESS_VIOLATION, SIGSEGV}, |
| 59 | {EXCEPTION_IN_PAGE_ERROR, SIGSEGV}, |
| 60 | {EXCEPTION_INVALID_HANDLE, SIGSEGV}, |
| 61 | {EXCEPTION_ILLEGAL_INSTRUCTION, SIGILL}, |
| 62 | {EXCEPTION_NONCONTINUABLE_EXCEPTION, SIGILL}, |
| 63 | {EXCEPTION_ARRAY_BOUNDS_EXCEEDED, SIGSEGV}, |
| 64 | {EXCEPTION_FLT_DENORMAL_OPERAND, SIGFPE}, |
| 65 | {EXCEPTION_FLT_DIVIDE_BY_ZERO, SIGFPE}, |
| 66 | {EXCEPTION_FLT_INEXACT_RESULT, SIGFPE}, |
| 67 | {EXCEPTION_FLT_INVALID_OPERATION, SIGFPE}, |
| 68 | {EXCEPTION_FLT_OVERFLOW, SIGFPE}, |
| 69 | {EXCEPTION_FLT_STACK_CHECK, SIGFPE}, |
| 70 | {EXCEPTION_FLT_UNDERFLOW, SIGFPE}, |
| 71 | {EXCEPTION_INT_DIVIDE_BY_ZERO, SIGFPE}, |
| 72 | {EXCEPTION_INT_OVERFLOW, SIGFPE}, |
| 73 | {EXCEPTION_PRIV_INSTRUCTION, SIGILL}, |
| 74 | {EXCEPTION_STACK_OVERFLOW, SIGSEGV}, |
| 75 | {CONTROL_C_EXIT, SIGTERM} |
| 76 | }; |
| 77 | |
| 78 | for (const xlate_status &x : status_xlate_tbl) |
| 79 | if (x.status == status) |
| 80 | return x.sig; |
| 81 | |
| 82 | return -1; |
| 83 | } |
| 84 | |
| 85 | #endif /* __MINGW32__ */ |