Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/runtime/InterpretedVFrame.java @ 7353:b5280041f59e
Experiment with soft alignment for branch targets.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 13 Jan 2013 19:32:16 +0100 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2000, 2009, 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.runtime; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.interpreter.*; import sun.jvm.hotspot.oops.*; import sun.jvm.hotspot.utilities.*; public class InterpretedVFrame extends JavaVFrame { /** JVM state */ public Method getMethod() { return getFrame().getInterpreterFrameMethod(); } public StackValueCollection getLocals() { Method m = getMethod(); int length = (int) m.getMaxLocals(); if (m.isNative()) { // If the method is native, getMaxLocals is not telling the truth. // maxlocals then equals the size of parameters length = (int) m.getSizeOfParameters(); } StackValueCollection result = new StackValueCollection(length); // Get oopmap describing oops and int for current bci OopMapCacheEntry oopMask = getMethod().getMaskFor(getBCI()); // handle locals for(int i = 0; i < length; i++) { // Find stack location Address addr = addressOfLocalAt(i); // Depending on oop/int put it in the right package StackValue sv; if (oopMask.isOop(i)) { // oop value sv = new StackValue(addr.getOopHandleAt(0), 0); } else { // integer // Fetch a signed integer the size of a stack slot sv = new StackValue(addr.getCIntegerAt(0, VM.getVM().getAddressSize(), false)); } result.add(sv); } return result; } public StackValueCollection getExpressions() { int length = getFrame().getInterpreterFrameExpressionStackSize(); if (getMethod().isNative()) { // If the method is native, there is no expression stack length = 0; } int nofLocals = (int) getMethod().getMaxLocals(); StackValueCollection result = new StackValueCollection(length); // Get oopmap describing oops and int for current bci OopMapCacheEntry oopMask = getMethod().getMaskFor(getBCI()); for(int i = 0; i < length; i++) { // Find stack location Address addr = addressOfExpressionStackAt(i); // Depending on oop/int put it in the right package StackValue sv; if (oopMask.isOop(i + nofLocals)) { // oop value sv = new StackValue(addr.getOopHandleAt(0), 0); } else { // integer // Fetch a signed integer the size of a stack slot sv = new StackValue(addr.getCIntegerAt(0, VM.getVM().getAddressSize(), false)); } result.add(sv); } return result; } /** Returns List<MonitorInfo> */ public List getMonitors() { List result = new ArrayList(5); for (BasicObjectLock current = getFrame().interpreterFrameMonitorEnd(); current.address().lessThan(getFrame().interpreterFrameMonitorBegin().address()); current = getFrame().nextMonitorInInterpreterFrame(current)) { result.add(new MonitorInfo(current.obj(), current.lock(), false, false)); } return result; } /** Test operation */ public boolean isInterpretedFrame() { return true; } /** Package-internal constructor */ InterpretedVFrame(Frame fr, RegisterMap regMap, JavaThread thread) { super(fr, regMap, thread); } /** Accessor for Byte Code Index (NOTE: access to BCP is not allowed in this system; see Frame.java) */ public int getBCI() { return getFrame().getInterpreterFrameBCI(); } /** Setter for Byte Code Index */ // FIXME: not yet implementable // public void setBCI(int bci) { // getFrame().setInterpreterFrameBCI(bci); // } public void verify() { } //-------------------------------------------------------------------------------- // Internals only below this point // private Address addressOfLocalAt(int index) { if (Assert.ASSERTS_ENABLED) { Assert.that(getFrame().isInterpretedFrame(), "frame should be an interpreted frame"); } return fr.addressOfInterpreterFrameLocal(index); } private Address addressOfExpressionStackAt(int index) { return fr.addressOfInterpreterFrameExpressionStackSlot(index); } }