Bundle names will be modified to align with the existing “debuginfo” and “fastdebug” bundle names. We will introduce a new VM system property “java.vm.debug” which propagates the build’s existing DEBUGLEVEL (“release”, “fastdebug”, “slowdebug”, “optimized”). The “debugness” of a build will be printed out by the launcher in all cases except when it’s “release”, e.g.:

java.vm.debug = (“foo” != “release”)

$java -version
java version "9-ea"
Java(TM) SE Runtime Environment (foo build 9-ea+88)
Java HotSpot(TM) 64-Bit Server VM (foo build 9-ea+88, mixed mode)

java.vm.debug = “release”:

$java -version
java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+88)
Java HotSpot(TM) 64-Bit Server VM (build 9-ea+88, mixed mode)

It may be necessary to update regression tests to use the system property to determine the debug level.