Linux中父子进程Fork与malloc关系示例

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define SIZE 16

int main()
{
	char *data;
	
	data=(char *)malloc(SIZE);
	if(data==NULL)
	{	
		printf("mallco failed!\n");
		exit(1);
	}

	char *str="test data";
	strcpy(data,str);
	printf("before fork,the data is: %s\n",data);
	printf("before fork the addr of mem is: %p\n",data);
	
	int pid;
	if((pid=fork())==0)//父进程查看分配的内存信息
	{
		strcpy(data,"I am parent");
		printf("In parent,the data is: %s\n",data);
		printf("In parent,the addr of mem is: %p\n",data);
		
		sleep(10);
		printf("In parent,the data is: %s\n",data);
		printf("In parent,the addr of mem is: %p\n",data);
	}
	else
	{
		sleep(5);
		strcpy(data,"I am child");
		printf("In child,the data is: %s\n",data);
		printf("In child,the addr of mem is: %p\n",data);
	}

	free(data);

	return 0;

}