linprocfs and linux-sun-{jdk,jre}15

[Andrew Pantyukhin]

If I run 'java' (either directly or through the wrapper) under
an unprivileged user with linprocfs mounted it hangs in
a CPU hog. Truss shows continuous read(2) calls all
with 'Permission denied' errors.

If I unmount linprocfs and try again I get this error:
Java HotSpot(TM) Client VM warning: Can't detect initial thread stack
location - find_vma failed
but everything works great after that.

Under root java runs fine with linprocfs and emits the same
warning without.