1 /* Support code for standard wait macros in gdb_wait.h. 2 3 Copyright (C) 2019-2024 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 21 #include "gdb_wait.h" 22 23 #ifdef __MINGW32__ 24 25 /* The underlying idea is that when a Windows program is terminated by 26 a fatal exception, its exit code is the value of that exception, as 27 defined by the various EXCEPTION_* symbols in the Windows API 28 headers. We thus emulate WTERMSIG etc. by translating the fatal 29 exception codes to more-or-less equivalent Posix signals. 30 31 The translation below is not perfect, because a program could 32 legitimately exit normally with a status whose value happens to 33 have the high bits set, but that's extremely rare, to say the 34 least, and it is deemed such a negligibly small probability of 35 false positives is justified by the utility of reporting the 36 terminating signal in the "normal" cases. */ 37 38 # include <signal.h> 39 40 # define WIN32_LEAN_AND_MEAN 41 # include <windows.h> /* for EXCEPTION_* constants */ 42 43 struct xlate_status 44 { 45 /* The exit status (actually, fatal exception code). */ 46 DWORD status; 47 48 /* The corresponding signal value. */ 49 int sig; 50 }; 51 52 int 53 windows_status_to_termsig (unsigned long status) 54 { 55 static const xlate_status status_xlate_tbl[] = 56 { 57 {EXCEPTION_ACCESS_VIOLATION, SIGSEGV}, 58 {EXCEPTION_IN_PAGE_ERROR, SIGSEGV}, 59 {EXCEPTION_INVALID_HANDLE, SIGSEGV}, 60 {EXCEPTION_ILLEGAL_INSTRUCTION, SIGILL}, 61 {EXCEPTION_NONCONTINUABLE_EXCEPTION, SIGILL}, 62 {EXCEPTION_ARRAY_BOUNDS_EXCEEDED, SIGSEGV}, 63 {EXCEPTION_FLT_DENORMAL_OPERAND, SIGFPE}, 64 {EXCEPTION_FLT_DIVIDE_BY_ZERO, SIGFPE}, 65 {EXCEPTION_FLT_INEXACT_RESULT, SIGFPE}, 66 {EXCEPTION_FLT_INVALID_OPERATION, SIGFPE}, 67 {EXCEPTION_FLT_OVERFLOW, SIGFPE}, 68 {EXCEPTION_FLT_STACK_CHECK, SIGFPE}, 69 {EXCEPTION_FLT_UNDERFLOW, SIGFPE}, 70 {EXCEPTION_INT_DIVIDE_BY_ZERO, SIGFPE}, 71 {EXCEPTION_INT_OVERFLOW, SIGFPE}, 72 {EXCEPTION_PRIV_INSTRUCTION, SIGILL}, 73 {EXCEPTION_STACK_OVERFLOW, SIGSEGV}, 74 {CONTROL_C_EXIT, SIGTERM} 75 }; 76 77 for (const xlate_status &x : status_xlate_tbl) 78 if (x.status == status) 79 return x.sig; 80 81 return -1; 82 } 83 84 #endif /* __MINGW32__ */ 85