The customer (a tools vendor) needs a mechanism for passing command line
options to java in circumstances where the command line is not available
for modification. This includes situations where java is invoked by
fork/exec from another application or where java is embedded in a larger
application.

The primary purpose is to provide java runtime profiling, thread usage, and
code coverage in the context of large client/server applications (simple
example: servlets). The proposed uses would be causing a JVMPI module to
be loaded and/or altering the bootclasspath.

Currently there exists an environment variable _JAVA_OPTIONS which can be
used to do exactly this, although it is not documented and therefore not
public/supported. This variable appears to be used by classic and exactvm,
but not hotspot.

Please choose to make the use of this variable public, supported, and
documented.