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29 lines
666 B
C
29 lines
666 B
C
#define _GNU_SOURCE
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#include <sched.h>
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#include <sys/wait.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/mman.h>
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#include <strings.h>
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#include <unistd.h>
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#define STACK_SIZE (1024 * 1024)
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int child(void* buf){
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printf("print buf (addr=%p): %s\n",buf,(char *) buf);
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sleep(2);
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printf("print buf (addr=%p): %s\n",buf, (char *)buf);
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exit(EXIT_SUCCESS);
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}
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int main(){
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char * stack = malloc(STACK_SIZE * sizeof(char));
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char * buf = malloc(256 * sizeof(char));
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snprintf(buf,256,"inital");
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clone(child, stack + STACK_SIZE, SIGCHLD | CLONE_THREAD | CLONE_SIGHAND | CLONE_VM, buf);
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sleep(1);
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snprintf(buf,256,"changed");
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sleep(2);
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exit(EXIT_SUCCESS);
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}
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