Mercurial > hg > truffle
view graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/DebugInfo.java @ 10765:ae3d070ab223
make ValueNode.stamp() final, fix WordTypeRewriterPhase
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Mon, 15 Jul 2013 16:36:54 +0200 |
parents | 47e7933283f1 |
children | df023d960636 |
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/* * Copyright (c) 2009, 2011, 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 com.oracle.graal.api.code; import java.io.*; import java.util.*; /** * Represents the debugging information for a particular point of execution. This information * includes: * <ul> * <li>a {@linkplain #getBytecodePosition() bytecode position}</li> * <li>a reference map for {@linkplain #getRegisterRefMap() registers}</li> * <li>a reference map for {@linkplain #getRegisterRefMap() stack slots} in the current frame</li> * <li>a map from bytecode locals and operand stack slots to their values or locations from which * their values can be read</li> * <li>a map from the registers (in the caller's frame) to the slots where they are saved in the * current frame</li> */ public class DebugInfo implements Serializable { private static final long serialVersionUID = -6047206624915812516L; private final BytecodePosition bytecodePosition; private final BitSet registerRefMap; private final BitSet frameRefMap; private final short deoptimizationReason; private RegisterSaveLayout calleeSaveInfo; /** * Creates a new {@link DebugInfo} from the given values. * * @param codePos the {@linkplain BytecodePosition code position} or {@linkplain BytecodeFrame * frame} info * @param registerRefMap the register map * @param frameRefMap the reference map for {@code frame}, which may be {@code null} */ public DebugInfo(BytecodePosition codePos, BitSet registerRefMap, BitSet frameRefMap, short deoptimizationReason) { this.bytecodePosition = codePos; this.registerRefMap = registerRefMap; this.frameRefMap = frameRefMap; this.deoptimizationReason = deoptimizationReason; } /** * @return {@code true} if this debug information has a frame */ public boolean hasFrame() { return getBytecodePosition() instanceof BytecodeFrame; } /** * @return {@code true} if this debug info has a reference map for the registers */ public boolean hasRegisterRefMap() { return getRegisterRefMap() != null && getRegisterRefMap().size() > 0; } /** * @return {@code true} if this debug info has a reference map for the stack */ public boolean hasStackRefMap() { return getFrameRefMap() != null && getFrameRefMap().size() > 0; } /** * Gets the deoptimization information for each inlined frame (if available). * * @return {@code null} if no frame de-opt info is {@linkplain #hasFrame() available} */ public BytecodeFrame frame() { if (hasFrame()) { return (BytecodeFrame) getBytecodePosition(); } return null; } @Override public String toString() { return CodeUtil.append(new StringBuilder(100), this, null).toString(); } /** * @return The code position (including all inlined methods) of this debug info. If this is a * {@link BytecodeFrame} instance, then it is also the deoptimization information for * each inlined frame. */ public BytecodePosition getBytecodePosition() { return bytecodePosition; } /** * @return The reference map for the registers at this point. The reference map is <i>packed</i> * in that for bit {@code k} in byte {@code n}, it refers to the register whose * {@linkplain Register#number number} is {@code (k + n * 8)}. */ public BitSet getRegisterRefMap() { return registerRefMap; } /** * @return The reference map for the stack frame at this point. A set bit at {@code k} in the * map represents stack slot number {@code k}. */ public BitSet getFrameRefMap() { return frameRefMap; } /** * Identifies the reason in case a deoptimization happens at this program counter. * * @return the reason of the deoptimization */ public short getDeoptimizationReason() { return deoptimizationReason; } /** * Sets the map from the registers (in the caller's frame) to the slots where they are saved in * the current frame. */ public void setCalleeSaveInfo(RegisterSaveLayout calleeSaveInfo) { this.calleeSaveInfo = calleeSaveInfo; } /** * Gets the map from the registers (in the caller's frame) to the slots where they are saved in * the current frame. If no such information is available, {@code null} is returned. */ public RegisterSaveLayout getCalleeSaveInfo() { return calleeSaveInfo; } }