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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  *  * Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in
     12  *    the documentation and/or other materials provided with the
     13  *    distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
     22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 /* Basic test of setjmp() functionality */
     30 
     31 #include <setjmp.h>
     32 #include <stdio.h>
     33 #include <stdlib.h>
     34 
     35 #define INT_VALUE1   0x12345678
     36 #define INT_VALUE2   0xfedcba98
     37 
     38 #define FLOAT_VALUE1   (1.2345678)
     39 #define FLOAT_VALUE2   (9.8765432)
     40 
     41 int     dummy_int;
     42 double  dummy_double;
     43 
     44 /* test that integer registers are restored properly */
     45 static void
     46 test_int(void)
     47 {
     48     jmp_buf  jumper;
     49     register int xx = INT_VALUE1;
     50 
     51     if (setjmp(jumper) == 0) {
     52         xx = INT_VALUE2;
     53         longjmp(jumper, 1);
     54     } else {
     55         if (xx != INT_VALUE1) {
     56             fprintf(stderr, "setjmp() is broken for integer registers !\n");
     57             exit(1);
     58         }
     59     }
     60     dummy_int = xx;
     61 }
     62 
     63 static void
     64 test_float(void)
     65 {
     66     jmp_buf  jumper;
     67     register double xx = FLOAT_VALUE1;
     68 
     69     if (setjmp(jumper) == 0) {
     70         xx = FLOAT_VALUE2;
     71         longjmp(jumper, 1);
     72     } else {
     73         if (xx != FLOAT_VALUE1) {
     74             fprintf(stderr, "setjmp() is broken for floating point registers !\n");
     75             exit(1);
     76         }
     77     }
     78     dummy_double = xx;
     79 }
     80 
     81 int main(void)
     82 {
     83     test_int();
     84     test_float();
     85     return 0;
     86 }
     87