hg: jdk/jdk: 8205195: NestedThreadsListHandleInErrorHandlingTest fails because hs_err doesn't contain _nested_thread_list_max

[daniel.daugherty at oracle.com]

Changeset: 5698cf4e50f1
Author:    dcubed
Date:      2018-06-22 12:15 -0400
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/5698cf4e50f1

8205195: NestedThreadsListHandleInErrorHandlingTest fails because hs_err doesn't contain _nested_thread_list_max
Summary: Grab Threads_lock in VMError::controlled_crash() so ErrorHandling tests are more stable.
Reviewed-by: stuefe, sspitsyn

! src/hotspot/share/runtime/threadSMR.cpp
! src/hotspot/share/utilities/vmError.cpp