DTrace memory leak 内存泄露

 

http://blog.sina.com.cn/s/blog_538040b70100eecn.html

 

如下程序用于跟踪，在分配和回收都会触发探针

#!/usr/sbin/dtrace -s

pid$target:libc:malloc:entry
{
    self->trace = 1;
    self->size = arg0;
}
pid$target:libc:malloc:return
/self->trace == 1/
{
    printf("Ptr=0x%p Size=%d", arg1, self->size);
    ustack();
    self->trace = 0;
    self->size = 0;
}

pid$target:libc:realloc:entry
{
    self->trace = 1;
    self->size = arg1;
    self->oldptr = arg0;
}

pid$target:libc:realloc:return
/self->trace == 1/
{
    printf("Ptr=0x%p Oldptr=0x%p Size=%d", arg1, self->oldptr, self->size);
    ustack();
    self->trace = 0;
    self->size = 0;
}

pid$target:libc:calloc:entry
{
    self->trace = 1;
    self->size = arg1;
}

pid$target:libc:calloc:return
/self->trace == 1/
{
    printf("Ptr=0x%p Size=%d", arg1, self->size);
    ustack();
    self->trace = 0;
    self->size = 0;
}

pid$target:libc:free:entry
{
    printf("Ptr=0x%p ", arg0);
}

然后用perl程序将正常分配回收的去掉，剩下的就是有问题的调用了。