--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/compiler/OopMapValue.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2000, 2008, Oracle and/or its affiliates. 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.
+ *
+ */
+
+package sun.jvm.hotspot.compiler;
+
+import java.util.*;
+
+import sun.jvm.hotspot.code.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.types.*;
+import sun.jvm.hotspot.utilities.*;
+
+public class OopMapValue {
+ private short value;
+ private short contentReg;
+
+ /** Read from target VM; located in compiler/oopMap.hpp */
+ // How bits are organized
+ static int TYPE_BITS;
+ static int REGISTER_BITS;
+ static int TYPE_SHIFT;
+ static int REGISTER_SHIFT;
+ static int TYPE_MASK;
+ static int TYPE_MASK_IN_PLACE;
+ static int REGISTER_MASK;
+ static int REGISTER_MASK_IN_PLACE;
+
+ // Types of OopValues
+ static int UNUSED_VALUE;
+ static int OOP_VALUE;
+ static int NARROWOOP_VALUE;
+ static int CALLEE_SAVED_VALUE;
+ static int DERIVED_OOP_VALUE;
+
+ static {
+ VM.registerVMInitializedObserver(new Observer() {
+ public void update(Observable o, Object data) {
+ initialize(VM.getVM().getTypeDataBase());
+ }
+ });
+ }
+
+ private static void initialize(TypeDataBase db) {
+ TYPE_BITS = db.lookupIntConstant("OopMapValue::type_bits").intValue();
+ REGISTER_BITS = db.lookupIntConstant("OopMapValue::register_bits").intValue();
+ TYPE_SHIFT = db.lookupIntConstant("OopMapValue::type_shift").intValue();
+ REGISTER_SHIFT = db.lookupIntConstant("OopMapValue::register_shift").intValue();
+ TYPE_MASK = db.lookupIntConstant("OopMapValue::type_mask").intValue();
+ TYPE_MASK_IN_PLACE = db.lookupIntConstant("OopMapValue::type_mask_in_place").intValue();
+ REGISTER_MASK = db.lookupIntConstant("OopMapValue::register_mask").intValue();
+ REGISTER_MASK_IN_PLACE = db.lookupIntConstant("OopMapValue::register_mask_in_place").intValue();
+ UNUSED_VALUE = db.lookupIntConstant("OopMapValue::unused_value").intValue();
+ OOP_VALUE = db.lookupIntConstant("OopMapValue::oop_value").intValue();
+ NARROWOOP_VALUE = db.lookupIntConstant("OopMapValue::narrowoop_value").intValue();
+ CALLEE_SAVED_VALUE = db.lookupIntConstant("OopMapValue::callee_saved_value").intValue();
+ DERIVED_OOP_VALUE = db.lookupIntConstant("OopMapValue::derived_oop_value").intValue();
+ }
+
+ public static abstract class OopTypes {
+ public static final OopTypes UNUSED_VALUE = new OopTypes() { int getValue() { return OopMapValue.UNUSED_VALUE; }};
+ public static final OopTypes OOP_VALUE = new OopTypes() { int getValue() { return OopMapValue.OOP_VALUE; }};
+ public static final OopTypes NARROWOOP_VALUE = new OopTypes() { int getValue() { return OopMapValue.NARROWOOP_VALUE; }};
+ public static final OopTypes CALLEE_SAVED_VALUE = new OopTypes() { int getValue() { return OopMapValue.CALLEE_SAVED_VALUE; }};
+ public static final OopTypes DERIVED_OOP_VALUE = new OopTypes() { int getValue() { return OopMapValue.DERIVED_OOP_VALUE; }};
+
+ abstract int getValue();
+ protected OopTypes() {}
+ }
+
+ public OopMapValue() { setValue((short) 0); setContentReg(new VMReg(0)); }
+ public OopMapValue(VMReg reg, OopTypes t) { setReg(reg); setType(t); }
+ public OopMapValue(VMReg reg, OopTypes t, VMReg reg2) { setReg(reg); setType(t); setContentReg(reg2); }
+ public OopMapValue(CompressedReadStream stream) { readFrom(stream); }
+
+ public void readFrom(CompressedReadStream stream) {
+ setValue((short) stream.readInt());
+ if (isCalleeSaved() || isDerivedOop()) {
+ setContentReg(new VMReg(stream.readInt()));
+ }
+ }
+
+ // Querying
+ public boolean isOop() { return (getValue() & TYPE_MASK_IN_PLACE) == OOP_VALUE; }
+ public boolean isNarrowOop() { return (getValue() & TYPE_MASK_IN_PLACE) == NARROWOOP_VALUE; }
+ public boolean isCalleeSaved() { return (getValue() & TYPE_MASK_IN_PLACE) == CALLEE_SAVED_VALUE; }
+ public boolean isDerivedOop() { return (getValue() & TYPE_MASK_IN_PLACE) == DERIVED_OOP_VALUE; }
+
+ public VMReg getReg() { return new VMReg((getValue() & REGISTER_MASK_IN_PLACE) >> REGISTER_SHIFT); }
+ public void setReg(VMReg r) { setValue((short) (r.getValue() << REGISTER_SHIFT | (getValue() & TYPE_MASK_IN_PLACE))); }
+
+ public OopTypes getType() {
+ int which = (getValue() & TYPE_MASK_IN_PLACE);
+ if (which == UNUSED_VALUE) return OopTypes.UNUSED_VALUE;
+ else if (which == OOP_VALUE) return OopTypes.OOP_VALUE;
+ else if (which == NARROWOOP_VALUE) return OopTypes.NARROWOOP_VALUE;
+ else if (which == CALLEE_SAVED_VALUE) return OopTypes.CALLEE_SAVED_VALUE;
+ else if (which == DERIVED_OOP_VALUE) return OopTypes.DERIVED_OOP_VALUE;
+ else throw new InternalError("unknown which " + which + " (TYPE_MASK_IN_PLACE = " + TYPE_MASK_IN_PLACE + ")");
+ }
+ public void setType(OopTypes t) { setValue((short) ((getValue() & REGISTER_MASK_IN_PLACE) | t.getValue())); }
+
+ public VMReg getContentReg() { return new VMReg(contentReg); }
+ public void setContentReg(VMReg r) { contentReg = (short) r.getValue(); }
+
+ /** Physical location queries */
+ public boolean isRegisterLoc() { return (getReg().lessThan(VM.getVM().getVMRegImplInfo().getStack0())); }
+ public boolean isStackLoc() { return (getReg().greaterThanOrEqual(VM.getVM().getVMRegImplInfo().getStack0())); }
+
+ /** Returns offset from sp. */
+ public int getStackOffset() {
+ if (Assert.ASSERTS_ENABLED) {
+ Assert.that(isStackLoc(), "must be stack location");
+ }
+ return getReg().minus(VM.getVM().getVMRegImplInfo().getStack0());
+ }
+
+ //--------------------------------------------------------------------------------
+ // Internals only below this point
+ //
+
+ private void setValue(short value) {
+ this.value = value;
+ }
+
+ private int getValue() {
+ return value;
+ }
+}