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/* Support code for standard wait macros in gdb_wait.h.
Copyright (C) 2019 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "common-defs.h"
#include "gdb_wait.h"
#ifdef __MINGW32__
/* The underlying idea is that when a Windows program is terminated by
a fatal exception, its exit code is the value of that exception, as
defined by the various EXCEPTION_* symbols in the Windows API
headers. We thus emulate WTERMSIG etc. by translating the fatal
exception codes to more-or-less equivalent Posix signals.
The translation below is not perfect, because a program could
legitimately exit normally with a status whose value happens to
have the high bits set, but that's extremely rare, to say the
least, and it is deemed such a negligibly small probability of
false positives is justified by the utility of reporting the
terminating signal in the "normal" cases. */
# include <signal.h>
# define WIN32_LEAN_AND_MEAN
# include <windows.h> /* for EXCEPTION_* constants */
struct xlate_status
{
/* The exit status (actually, fatal exception code). */
DWORD status;
/* The corresponding signal value. */
int sig;
};
int
windows_status_to_termsig (unsigned long status)
{
static const xlate_status status_xlate_tbl[] =
{
{EXCEPTION_ACCESS_VIOLATION, SIGSEGV},
{EXCEPTION_IN_PAGE_ERROR, SIGSEGV},
{EXCEPTION_INVALID_HANDLE, SIGSEGV},
{EXCEPTION_ILLEGAL_INSTRUCTION, SIGILL},
{EXCEPTION_NONCONTINUABLE_EXCEPTION, SIGILL},
{EXCEPTION_ARRAY_BOUNDS_EXCEEDED, SIGSEGV},
{EXCEPTION_FLT_DENORMAL_OPERAND, SIGFPE},
{EXCEPTION_FLT_DIVIDE_BY_ZERO, SIGFPE},
{EXCEPTION_FLT_INEXACT_RESULT, SIGFPE},
{EXCEPTION_FLT_INVALID_OPERATION, SIGFPE},
{EXCEPTION_FLT_OVERFLOW, SIGFPE},
{EXCEPTION_FLT_STACK_CHECK, SIGFPE},
{EXCEPTION_FLT_UNDERFLOW, SIGFPE},
{EXCEPTION_INT_DIVIDE_BY_ZERO, SIGFPE},
{EXCEPTION_INT_OVERFLOW, SIGFPE},
{EXCEPTION_PRIV_INSTRUCTION, SIGILL},
{EXCEPTION_STACK_OVERFLOW, SIGSEGV},
{CONTROL_C_EXIT, SIGTERM}
};
for (const xlate_status &x : status_xlate_tbl)
if (x.status == status)
return x.sig;
return -1;
}
#endif /* __MINGW32__ */
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