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Member "stress-ng-0.09.56/stress-longjmp.c" (15 Mar 2019, 1662 Bytes) of package /linux/privat/stress-ng-0.09.56.tar.xz:


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    1 /*
    2  * Copyright (C) 2013-2019 Canonical, Ltd.
    3  *
    4  * This program is free software; you can redistribute it and/or
    5  * modify it under the terms of the GNU General Public License
    6  * as published by the Free Software Foundation; either version 2
    7  * of the License, or (at your option) any later version.
    8  *
    9  * This program is distributed in the hope that it will be useful,
   10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   12  * GNU General Public License for more details.
   13  *
   14  * You should have received a copy of the GNU General Public License
   15  * along with this program; if not, write to the Free Software
   16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
   17  *
   18  * This code is a complete clean re-write of the stress tool by
   19  * Colin Ian King <colin.king@canonical.com> and attempts to be
   20  * backwardly compatible with the stress tool by Amos Waterland
   21  * <apw@rossby.metr.ou.edu> but has more stress tests and more
   22  * functionality.
   23  *
   24  */
   25 #include "stress-ng.h"
   26 
   27 static jmp_buf buf;
   28 
   29 static void OPTIMIZE1 NOINLINE NORETURN stress_longjmp_func(void)
   30 {
   31     longjmp(buf, 1);    /* Jump out */
   32 
   33     _exit(EXIT_FAILURE);    /* Never get here */
   34 }
   35 
   36 /*
   37  *  stress_jmp()
   38  *  stress system by setjmp/longjmp calls
   39  */
   40 static int OPTIMIZE1 stress_longjmp(const args_t *args)
   41 {
   42     int ret;
   43 
   44     ret = setjmp(buf);
   45 
   46     if (ret) {
   47         static int c = 0;
   48 
   49         c++;
   50         if (c >= 1000) {
   51             inc_counter(args);
   52             c = 0;
   53         }
   54     }
   55     if (keep_stressing())
   56         stress_longjmp_func();
   57 
   58     return EXIT_SUCCESS;
   59 }
   60 
   61 stressor_info_t stress_longjmp_info = {
   62     .stressor = stress_longjmp,
   63     .class = CLASS_CPU
   64 };