src/share/vm/runtime/biasedLocking.cpp
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rev 4810 : 8017317: PPC64 (part 7): cppInterpreter: implement support for biased locking
Summary: Also add a memory ordering operation in revoke_bias() needed without TSO.
*** 231,242 ****
}
if (highest_lock != NULL) {
// Fix up highest lock to contain displaced header and point
// object at it
highest_lock->set_displaced_header(unbiased_prototype);
! // Reset object header to point to displaced mark
! obj->set_mark(markOopDesc::encode(highest_lock));
assert(!obj->mark()->has_bias_pattern(), "illegal mark state: stack lock used bias bit");
if (TraceBiasedLocking && (Verbose || !is_bulk)) {
tty->print_cr(" Revoked bias of currently-locked object");
}
} else {
--- 231,244 ----
}
if (highest_lock != NULL) {
// Fix up highest lock to contain displaced header and point
// object at it
highest_lock->set_displaced_header(unbiased_prototype);
! // Reset object header to point to displaced mark.
! // Must release storing the lock address for platforms without TSO
! // ordering (e.g. ppc).
! obj->release_set_mark(markOopDesc::encode(highest_lock));
assert(!obj->mark()->has_bias_pattern(), "illegal mark state: stack lock used bias bit");
if (TraceBiasedLocking && (Verbose || !is_bulk)) {
tty->print_cr(" Revoked bias of currently-locked object");
}
} else {