where is the code for recursive locking of the same thread when use biased locking.

[yumin.qi at oracle.com]

  Wei,

   The code is in Assembler part(platform dependent part), if you follow 
monitorenter->lock_object->biased_locking_enter, you will find it. If 
the thread which owns the lock with biased pattern, it will not enter 
fast_enter/slow_enter.

   Hope this helps.

--Yumin


On 6/14/2011 8:45 AM, wei he wrote:
> dear all, this is my first post, so if there are something wrong, pls 
> to point out.
>
> As for biased locking, we know that when one thread has got an 
> object's lock use biased pattern, when the thread want to got the lock 
> again(the thread don't relase the lock at that time), hotspot just to 
> find the thread has already owned the lock and do nothing( at least 
> not change the object's header), could anyone told me where i can find 
> the code to deal with this recursive locking situation. I had read 
> synchronize.hpp(cpp),biasedLocking.hpp(cpp), but find nothing, i think 
> the fast_enter() function in the synchronize.cpp didn't deal this 
> case(The openjdk's version i got is 
> openjdk-7-ea-src-b136-31_mar_2011). Any suggestion is appreciated!