hg: hsx/hotspot-gc/hotspot: 7198529: NPG: assert with NMT code in Thread destructor

[zhengyu.gu at oracle.com]

Changeset: 6dfc6a541338
Author:    zgu
Date:      2012-09-14 12:55 -0400
URL:       http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/6dfc6a541338

7198529: NPG: assert with NMT code in Thread destructor
Summary: Thread stack's base address can be NULL if it is not started or exited before recording the base
Reviewed-by: kvn, fparain

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