RFR (S): 8165226: Bad -Xloggc: arguments crashes the VM

[Marcus Larsson]

Hi,

Please review the following patch to fix a VM crash when 
LogConfiguration::parse_log_arguments() is called with a null pointer as 
the error stream.

Summary:
LogConfiguration::parse_log_arguments() expects an outputStream to 
report errors on. Passing NULL works as long as no error occurs, but 
crashes the VM in case UL fails to configure the specified output. 
Usages of parse_log_arguments have been modified to pass an appropriate 
stream, and an assert checking for NULL has been added. Callers that use 
parse_log_arguments for configuration of stdout have been changed to use 
the more appropriate configure_stdout() instead.

Webrev:
http://cr.openjdk.java.net/~mlarsson/8165226/webrev.00/

Issue:
https://bugs.openjdk.java.net/browse/JDK-8165226

Testing:
JPRT testset hotspot

Thanks,
Marcus