--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/s390/vm/javaFrameAnchor_s390.hpp Thu Oct 13 14:49:34 2016 +0200
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef CPU_S390_VM_JAVAFRAMEANCHOR_S390_HPP
+#define CPU_S390_VM_JAVAFRAMEANCHOR_S390_HPP
+
+ public:
+
+ // Each arch must define reset, save, restore.
+ // These are used by objects that only care about:
+ // 1 - initializing a new state (thread creation, javaCalls)
+ // 2 - saving a current state (javaCalls)
+ // 3 - restoring an old state (javaCalls).
+
+ inline void clear(void) {
+ // Clearing _last_Java_sp must be first.
+ OrderAccess::release();
+ _last_Java_sp = NULL;
+ // Fence?
+ OrderAccess::fence();
+
+ _last_Java_pc = NULL;
+ }
+
+ inline void set(intptr_t* sp, address pc) {
+ _last_Java_pc = pc;
+
+ OrderAccess::release();
+ _last_Java_sp = sp;
+ }
+
+ void copy(JavaFrameAnchor* src) {
+ // In order to make sure the transition state is valid for "this"
+ // we must clear _last_Java_sp before copying the rest of the new data.
+ // Hack Alert: Temporary bugfix for 4717480/4721647
+ // To act like previous version (pd_cache_state) don't NULL _last_Java_sp
+ // unless the value is changing.
+ //
+ if (_last_Java_sp != src->_last_Java_sp) {
+ OrderAccess::release();
+ _last_Java_sp = NULL;
+ OrderAccess::fence();
+ }
+ _last_Java_pc = src->_last_Java_pc;
+ // Must be last so profiler will always see valid frame if has_last_frame() is true.
+
+ OrderAccess::release();
+ _last_Java_sp = src->_last_Java_sp;
+ }
+
+ // We don't have to flush registers, so the stack is always walkable.
+ inline bool walkable(void) { return true; }
+ inline void make_walkable(JavaThread* thread) { }
+
+ public:
+
+ // We don't have a frame pointer.
+ intptr_t* last_Java_fp(void) { return NULL; }
+
+ intptr_t* last_Java_sp() const { return _last_Java_sp; }
+ void set_last_Java_sp(intptr_t* sp) { OrderAccess::release(); _last_Java_sp = sp; }
+
+ address last_Java_pc(void) { return _last_Java_pc; }
+
+#endif // CPU_S390_VM_JAVAFRAMEANCHOR_S390_HPP