1 /* 2 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.hotspot; 24 25 import static jdk.vm.ci.code.BytecodeFrame.isPlaceholderBci; 26 27 import org.graalvm.compiler.core.gen.DebugInfoBuilder; 28 import org.graalvm.compiler.debug.GraalError; 29 import org.graalvm.compiler.lir.VirtualStackSlot; 30 import org.graalvm.compiler.nodes.FrameState; 31 import org.graalvm.compiler.nodes.ValueNode; 32 import org.graalvm.compiler.nodes.spi.NodeValueMap; 33 34 import jdk.vm.ci.code.BytecodeFrame; 35 import jdk.vm.ci.code.StackLockValue; 36 import jdk.vm.ci.code.VirtualObject; 37 import jdk.vm.ci.hotspot.HotSpotCodeCacheProvider; 38 import jdk.vm.ci.meta.JavaValue; 39 40 /** 41 * Extends {@link DebugInfoBuilder} to allocate the extra debug information required for locks. 42 */ 43 public class HotSpotDebugInfoBuilder extends DebugInfoBuilder { 44 45 private final HotSpotLockStack lockStack; 46 47 private int maxInterpreterFrameSize; 48 49 private HotSpotCodeCacheProvider codeCacheProvider; 50 51 public HotSpotDebugInfoBuilder(NodeValueMap nodeValueMap, HotSpotLockStack lockStack, HotSpotLIRGenerator gen) { 52 super(nodeValueMap); 53 this.lockStack = lockStack; 54 this.codeCacheProvider = gen.getProviders().getCodeCache(); 55 } 56 57 public HotSpotLockStack lockStack() { 58 return lockStack; 59 } 60 61 public int maxInterpreterFrameSize() { 62 return maxInterpreterFrameSize; 63 } 64 65 @Override 66 protected JavaValue computeLockValue(FrameState state, int lockIndex) { 67 int lockDepth = lockIndex; 68 if (state.outerFrameState() != null) { 69 lockDepth += state.outerFrameState().nestedLockDepth(); 70 } 71 VirtualStackSlot slot = lockStack.makeLockSlot(lockDepth); 72 ValueNode lock = state.lockAt(lockIndex); 73 JavaValue object = toJavaValue(lock); 74 boolean eliminated = object instanceof VirtualObject || state.monitorIdAt(lockIndex) == null; 75 assert state.monitorIdAt(lockIndex) == null || state.monitorIdAt(lockIndex).getLockDepth() == lockDepth; 76 return new StackLockValue(object, slot, eliminated); 77 } 78 79 @Override 80 protected BytecodeFrame computeFrameForState(FrameState state) { 81 if (isPlaceholderBci(state.bci) && state.bci != BytecodeFrame.BEFORE_BCI) { 82 // This is really a hard error since an incorrect state could crash hotspot 83 throw GraalError.shouldNotReachHere("Invalid state " + BytecodeFrame.getPlaceholderBciName(state.bci) + " " + state); 84 } 85 BytecodeFrame result = super.computeFrameForState(state); 86 maxInterpreterFrameSize = Math.max(maxInterpreterFrameSize, codeCacheProvider.interpreterFrameSize(result)); 87 return result; 88 } 89 }