Unsafe: removing the monitorEnter/monitorExit/tryMonitorEnter methods

[Tom Hawtin]

On 04/03/2014 15:32, David M. Lloyd wrote:
> On 03/03/2014 09:45 PM, David Holmes wrote:

>> We should not introduce anything that allows something that was
>> guaranteed to be safe by the language, to become unsafe.
>
> Define 'safe'.  Because I don't think it's unsafe, any more than

I believe even in the Java library it is common where a publicly 
accessible monitor is used to safeguard the integrity of security 
critical datastructures. Where monitorexit to become freely available, 
that would almost certainly be exploitable.

(Technically I believe the JVM spec does (or did) allow unmatched 
locking in some circumstances, but implementations really shouldn't.)

Tom