--- a/hotspot/src/cpu/s390/vm/macroAssembler_s390.cpp Tue Mar 21 16:36:12 2017 +0100
+++ b/hotspot/src/cpu/s390/vm/macroAssembler_s390.cpp Wed Mar 22 15:25:21 2017 +0100
@@ -3439,6 +3439,34 @@
z_mvi(0, store_addr, 0); // Store byte 0.
}
+void MacroAssembler::resolve_jobject(Register value, Register tmp1, Register tmp2) {
+ NearLabel Ldone;
+ z_ltgr(tmp1, value);
+ z_bre(Ldone); // Use NULL result as-is.
+
+ z_nill(value, ~JNIHandles::weak_tag_mask);
+ z_lg(value, 0, value); // Resolve (untagged) jobject.
+
+#if INCLUDE_ALL_GCS
+ if (UseG1GC) {
+ NearLabel Lnot_weak;
+ z_tmll(tmp1, JNIHandles::weak_tag_mask); // Test for jweak tag.
+ z_braz(Lnot_weak);
+ verify_oop(value);
+ g1_write_barrier_pre(noreg /* obj */,
+ noreg /* offset */,
+ value /* pre_val */,
+ noreg /* val */,
+ tmp1 /* tmp1 */,
+ tmp2 /* tmp2 */,
+ true /* pre_val_needed */);
+ bind(Lnot_weak);
+ }
+#endif // INCLUDE_ALL_GCS
+ verify_oop(value);
+ bind(Ldone);
+}
+
#if INCLUDE_ALL_GCS
//------------------------------------------------------