Mercurial > hg > Members > kaito > longjump

annotate pointer_longjump.c @ 4:d75a89b10176

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write pointer_longjump.c
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 14 Nov 2013 13:16:46 +0900
parents e6aa3b678e4a
children 4e7858590985
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 #include <stdio.h>
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2 #include <setjmp.h>
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3 #include <stdlib.h>
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5 __code code1(int n,__code(*__return)(int,void *,int *),void *__environment,int *__ret_p){
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6 printf("code1 : code entry1\n");
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7 goto __return(n,__environment,__ret_p);
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8 }
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10 __code return1 (int n,void* env,int* __ret_p){
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11 printf("return1 : __return entry\n");
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12 *__ret_p = n;
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13 longjmp(*(jmp_buf*)env,1);
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14 }
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16 int main1 (){
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17 __code (*__return)();
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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18 void *__environment;
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19 int retval;
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20 int *__ret_p;
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21 __ret_p = &retval;
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22 printf("main1 : main1 entry\n");
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23 __environment = (void*)malloc(sizeof(jmp_buf));
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24 if (setjmp(__environment)){
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25 free(__environment);
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26 printf("main1 : main1 return\n");
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27 return retval;
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28 }
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29 __return = return1;
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30 goto code1(30,__return,__environment,__ret_p);
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31 return 0;
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32 }
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33
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34 int main (){
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35 int n;
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36 n = main1();
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37 printf("returned\n");
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38 printf("return = %d\n",n);
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39 return 1;
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40 }