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view pointer_longjump.c @ 1:6d11ed2a5bed
write pointer_longjump.c
author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Tue, 12 Nov 2013 13:06:35 +0900 |
parents | dee9711aeb06 |
children | 76cd6ae48a1b |
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#include <stdio.h> #include <setjmp.h> #include <stdlib.h> __code code1(int n,void *__return,void *__enviroment,int *__ret_p){ void(*ret)(int,void *,int *); printf("code1\n"); ret = (void(*)(int,void *,int *))__return; ret(n,__enviroment,__ret_p); } void *return1 (int n,void* env,int* __ret_p){ printf("return1\n"); *__ret_p = n; longjmp(*(jmp_buf*)env,1); } int main1 (){ void *__return; void *__enviroment; int *__ret_p; printf("main1 entry\n"); __enviroment = (void*)malloc(sizeof(jmp_buf)); __ret_p = (int*)malloc(sizeof(int)); if (setjmp(__enviroment)){ free(__enviroment); printf("main1 return\n"); return *__ret_p; } __return = (void*)return1; goto code1(30,__return,__enviroment,__ret_p); return 0; } int main (){ int n; n = main1(); printf("returned\n"); printf("return = %d\n",n); return 1; }