Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/BytecodePosition.java @ 22672:1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
| author | Tom Rodriguez <tom.rodriguez@oracle.com> |
|---|---|
| date | Thu, 08 Oct 2015 17:28:41 -0700 |
| parents | jvmci/jdk.internal.jvmci.code/src/jdk/internal/jvmci/code/BytecodePosition.java@ec96f33a101d |
| children | d64936a16a13 |
| rev | line source |
|---|---|
| 22054 | 1 /* |
| 2 * Copyright (c) 2009, 2011, 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 */ | |
|
22672
1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22569
diff
changeset
|
23 package jdk.vm.ci.code; |
| 22054 | 24 |
|
22569
ec96f33a101d
updated imports to be explicit and added checkstyle rule to forbid * imports
Doug Simon <doug.simon@oracle.com>
parents:
22054
diff
changeset
|
25 import java.util.Objects; |
| 22054 | 26 |
|
22672
1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22569
diff
changeset
|
27 import jdk.vm.ci.meta.ResolvedJavaMethod; |
| 22054 | 28 |
| 29 /** | |
| 30 * Represents a code position, that is, a chain of inlined methods with bytecode locations, that is | |
| 31 * communicated from the compiler to the runtime system. A code position can be used by the runtime | |
| 32 * system to reconstruct a source-level stack trace for exceptions and to create | |
| 33 * {@linkplain BytecodeFrame frames} for deoptimization. | |
| 34 */ | |
| 35 public class BytecodePosition { | |
| 36 | |
| 37 private final BytecodePosition caller; | |
| 38 private final ResolvedJavaMethod method; | |
| 39 private final int bci; | |
| 40 | |
| 41 /** | |
| 42 * Constructs a new object representing a given parent/caller, a given method, and a given BCI. | |
| 43 * | |
| 44 * @param caller the parent position | |
| 45 * @param method the method | |
| 46 * @param bci a BCI within the method | |
| 47 */ | |
| 48 public BytecodePosition(BytecodePosition caller, ResolvedJavaMethod method, int bci) { | |
| 49 assert method != null; | |
| 50 this.caller = caller; | |
| 51 this.method = method; | |
| 52 this.bci = bci; | |
| 53 } | |
| 54 | |
| 55 /** | |
| 56 * Converts this code position to a string representation. | |
| 57 * | |
| 58 * @return a string representation of this code position | |
| 59 */ | |
| 60 @Override | |
| 61 public String toString() { | |
| 62 return CodeUtil.append(new StringBuilder(100), this).toString(); | |
| 63 } | |
| 64 | |
| 65 /** | |
| 66 * Deep equality test. | |
| 67 */ | |
| 68 @Override | |
| 69 public boolean equals(Object obj) { | |
| 70 if (obj == this) { | |
| 71 return true; | |
| 72 } | |
| 73 if (obj != null && getClass() == obj.getClass()) { | |
| 74 BytecodePosition that = (BytecodePosition) obj; | |
| 75 if (this.bci == that.bci && Objects.equals(this.getMethod(), that.getMethod()) && Objects.equals(this.caller, that.caller)) { | |
| 76 return true; | |
| 77 } | |
| 78 } | |
| 79 return false; | |
| 80 } | |
| 81 | |
| 82 @Override | |
| 83 public int hashCode() { | |
| 84 return getBCI(); | |
| 85 } | |
| 86 | |
| 87 /** | |
| 88 * @return The location within the method, as a bytecode index. The constant {@code -1} may be | |
| 89 * used to indicate the location is unknown, for example within code synthesized by the | |
| 90 * compiler. | |
| 91 */ | |
| 92 public int getBCI() { | |
| 93 return bci; | |
| 94 } | |
| 95 | |
| 96 /** | |
| 97 * @return The runtime interface method for this position. | |
| 98 */ | |
| 99 public ResolvedJavaMethod getMethod() { | |
| 100 return method; | |
| 101 } | |
| 102 | |
| 103 /** | |
| 104 * The position where this position has been called, {@code null} if none. | |
| 105 */ | |
| 106 public BytecodePosition getCaller() { | |
| 107 return caller; | |
| 108 } | |
| 109 | |
| 110 /** | |
| 111 * Adds a caller to the current position returning the new position. | |
| 112 */ | |
| 113 public BytecodePosition addCaller(BytecodePosition link) { | |
| 114 if (getCaller() == null) { | |
| 115 return new BytecodePosition(link, getMethod(), getBCI()); | |
| 116 } else { | |
| 117 return new BytecodePosition(getCaller().addCaller(link), getMethod(), getBCI()); | |
| 118 } | |
| 119 } | |
| 120 } |