[9] RFR: 8177136: Caller sensitive method System.getLogger should specify what happens if there is no caller on the stack.

[Daniel Fuchs]

Hi,

Please find below an updated patch for:

8177136: Caller sensitive method System.getLogger should  specify
          what happens if there is no caller on the stack.
https://bugs.openjdk.java.net/browse/JDK-8177136

webrev:
http://cr.openjdk.java.net/~dfuchs/webrev_8177136/webrev.01

System.getLogger(name) and System.getLogger(name, resourceBundle)
are specified to call LoggerFinder to obtain a logger, which requires 
the module of the caller class.
When there is no java frame on the stack, then the caller information 
cannot be obtained and there is not enough context to know which module 
would be appropriate.
The proposal is to throw IllegalCallerException - which is the exception
that StackWalker::getCallerClass will throw if called by
System::getLogger in this case.

This RFR follows the discussion started here:
http://mail.openjdk.java.net/pipermail/core-libs-dev/2017-March/046868.html

best regards,

-- daniel