Request for Review(xs) - 8155263: DisableStartThread should not be applied to GC worker threads

Jon Masamitsu jon.masamitsu at
Tue Jul 12 17:37:59 UTC 2016

The flag DisableStartThread is defined for Java threads

   develop(bool, DisableStartThread, false, \
           "Disable starting of additional Java threads " \
           "(for debugging only)")

but was being applied to GC threads in one case.  I removed
that use.

Tested by comparing the GC threads before and after the
change to verify that the concurrent GC threads were running.

Using +DisableStartThread on the command line cause the Java
threads not to run and under those circumstances a safepoint
is not reached (Java threads never get there).  Any of the test
programs I tried hung at the first GC.



More information about the hotspot-gc-dev mailing list