hg: jdk8u/jdk8u-dev/hotspot: 8216037: Avoid calling vm_update with a NULL name

[gnu.andrew at redhat.com]

Changeset: a9ab35a0f5cb
Author:    andrew
Date:      2019-01-08 04:55 +0000
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/a9ab35a0f5cb

8216037: Avoid calling vm_update with a NULL name
Summary: Pass the empty string instead of NULL for safer strcmp usage
Reviewed-by: andrew
Contributed-by: Siddhesh Poyarekar <siddhesh at gotplt.org>

! src/share/vm/runtime/fprofiler.cpp