Zero backport (2/7)

[Andrew John Hughes]

First of several fixes for Zero:

changeset:   1078:8e7adf982378
parent:      1073:de44705e6b33
user:        twisti
date:        Fri Nov 27 07:56:58 2009 -0800
summary:     6896043: first round of zero fixes

http://cr.openjdk.java.net/~andrew/zero/webrev.03/

I believe this is a pile of fixes that accumulated for Zero in IcedTea
prior to this commit:

Amalgamation of cc-interp-backedge (Remove some duplicated code in
DO_BACKEDGE_CHECKS),
cc-interp-jvmti (Disable some JVMTI capabilities which are unsupported
or do not work with the C++ interpreter),
ia64-bugfix (Remove workaround for IA64 GCC bug),
s390-serialize (Correctly detect serialization segfaults on s390) and
test-atomic-operations (Add check to see if GCC's sync_lock_test works).

Ok to push?  It builds ok here and passes the JTreg tests.
-- 
Andrew :-)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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