Mercurial > hg > Members > kaito > longjump
diff longjump.c @ 0:dee9711aeb06
the first commit
author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Tue, 12 Nov 2013 11:32:39 +0900 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/longjump.c Tue Nov 12 11:32:39 2013 +0900 @@ -0,0 +1,36 @@ +#include <stdio.h> +#include <setjmp.h> +#include <stdlib.h> + +__attribute__((noinline)) +__code code1(void *__return,void *__enviroment){ + void(*ret)(void *); + printf("code1\n"); + ret = (void(*)(void *))__return; + ret(__enviroment); +} + +void *return1 (void* env){ + printf("return1\n"); + longjmp(*(jmp_buf*)env,1); +} + +void main1 (){ + void *__return; + void *__enviroment; + printf("main1 entry\n"); + __enviroment = (void*)malloc(sizeof(jmp_buf)); + if (setjmp(__enviroment)){ + free(__enviroment); + printf("main1 return\n"); + return; + } + __return = (void*)return1; + goto code1(__return,__enviroment); +} + +int main (){ + main1(); + printf("returned\n"); + return 1; +}