ruby 方法执行过程， 估计还有问题， 没看到栈的调用

ruby_method_call_flow.d

#!/usr/sbin/dtrace -Zs
#pragma D option quiet
#pragma D option switchrate=10

self int depth;


ruby*:::method-entry
/pid == $target/
{
   this->name = copyinstr(arg1);
   printf("%*s-> %s\n", self->depth * 2,  "",  this->name);
   self->depth++;
}

ruby*:::method-return
/pid == $target/
{
   this->name = copyinstr(arg1);
   self->depth -= self->depth > 0 ? 1 : 0;
   printf("%*s<- %s\n",self->depth * 2, "", this->name);
}