111 lines
2.4 KiB
C
111 lines
2.4 KiB
C
/***************************************************************************
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gb_common.c
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(c) 2000-2017 Benoît Minisini <g4mba5@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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***************************************************************************/
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#define __COMMON_C
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#define __COMMON_CHECK_C
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#include "gb_common.h"
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#include "gb_common_check.h"
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#include "gb_common_string_temp.h"
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#include "gb_common_case_temp.h"
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#include "gb_common_buffer_temp.h"
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#include "gb_common_swap_temp.h"
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#include "gbx_signal.h"
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sigjmp_buf CHECK_jump;
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static SIGNAL_HANDLER _SIGSEGV_handler;
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static SIGNAL_HANDLER _SIGBUS_handler;
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static int _dummy;
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static volatile int _got_error;
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void COMMON_init(void)
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{
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}
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static void signal_error(int sig, siginfo_t *info, void *context)
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{
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SIGNAL_previous(sig == SIGSEGV ? &_SIGSEGV_handler : &_SIGBUS_handler, sig, info, context);
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_got_error = TRUE;
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siglongjmp(CHECK_jump, 1);
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}
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void CHECK_enter(void)
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{
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_got_error = FALSE;
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SIGNAL_install(&_SIGSEGV_handler, SIGSEGV, signal_error);
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SIGNAL_install(&_SIGBUS_handler, SIGBUS, signal_error);
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}
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void CHECK_leave(void)
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{
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SIGNAL_uninstall(&_SIGSEGV_handler, SIGSEGV);
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SIGNAL_uninstall(&_SIGBUS_handler, SIGBUS);
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}
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bool CHECK_got_error(void)
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{
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return _got_error;
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}
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bool CHECK_address(void *ptr, ssize_t len)
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{
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offset_t i;
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if (len < 0)
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return TRUE;
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CHECK_enter();
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if (sigsetjmp(CHECK_jump, TRUE) == 0)
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{
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for (i = 0; i < len; i += 1024)
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_dummy = ((int *)ptr)[i];
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_dummy = ((int *)ptr)[len >> 2];
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}
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CHECK_leave();
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return _got_error;
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}
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bool CHECK_strlen(char *ptr, ssize_t *len)
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{
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size_t l = 0;
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CHECK_enter();
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if (sigsetjmp(CHECK_jump, TRUE) == 0)
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{
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l = strlen(ptr);
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*len = l;
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}
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CHECK_leave();
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if (l != (size_t)(int)l)
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_got_error = TRUE;
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return _got_error;
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}
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