hg: jdk/sandbox: 8241043: Expand assertions to identify thread with errant _stack_base

[chris.hegarty at oracle.com]

Changeset: 59b5bd9a7168
Author:    dholmes
Date:      2020-03-16 02:16 -0400
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/59b5bd9a7168

8241043: Expand assertions to identify thread with errant _stack_base
Reviewed-by: mikael

! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/runtime/thread.hpp