RFR (S): 8039146: Fix 64-bit store to int JNIHandleBlock::_top

[Lindenmaier, Goetz]

Hi,

could I please get a review of this change?  It fixes a rather
obvious error, and is really simple.

Is runtime the wrong mainling list for interpreter changes?  Should I
post to comp?

Best regards,
  Goetz.

From: Lindenmaier, Goetz
Sent: Donnerstag, 3. April 2014 15:33
To: hotspot-runtime-dev at openjdk.java.net
Subject: RFR (S): 8039146: Fix 64-bit store to int JNIHandleBlock::_top

Hi,

please review an test this small fix to the interpreters.  I please need
a sponsor.
http://cr.openjdk.java.net/~goetz/webrevs/8039146-intSt/webrev.00/

JNIHandleBlock::_top is an int field. Various places store into
this field using a pointer store. On 64-bit platforms
this can cause errors.

This change adapts the corresponding operations on sparc
and both x86 variants to use fixed 32-bit operations.

Best regards,
  Goetz.
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