Ubuntu使用bcc工具模拟内存泄漏

1.安装bcc工具，命令：sudo apt-get install bpfcc-tools linux-headers-$(uname -r)

参考说明：https://github.com/iovisor/bcc/blob/master/INSTALL.md#ubuntu---binary

安装完成后，切换到/usr/sbin目录下使用ls查看，如图：

2.准备一个C程序,放到自己的家目录下,程序代码如下:

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <unistd.h>

long long *fibonacci(long long *n0, long long *n1)
{
    //分配1024个长整数空间方便观测内存的变化情况
    long long *v = (long long *) calloc(1024, sizeof(long long));
    *v = *n0 + *n1;
    return v;
}

void *child(void *arg)
{
    long long n0 = 0;
    long long n1 = 1;
    long long *v = NULL;
    int n = 2;
    for (n = 2; n > 0; n++) {
        v = fibonacci(&n0, &n1);
        n0 = n1;
        n1 = *v;
        printf("%dth => %lld\n", n, *v);
        sleep(1);
    }
}

int main(void)
{
    pthread_t tid;
    pthread_create(&tid, NULL, child, NULL);
    pthread_join(tid, NULL);
    printf("main thread exit\n");
    return 0;
}