GraphPrinter.java revision 12968:4d8a004e5c6d
1/* 2 * Copyright (c) 2012, 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 */ 23package org.graalvm.compiler.printer; 24 25import static org.graalvm.compiler.core.common.util.Util.JAVA_SPECIFICATION_VERSION; 26 27import java.io.Closeable; 28import java.io.IOException; 29import java.lang.reflect.Array; 30import java.util.Arrays; 31import java.util.List; 32import java.util.Map; 33import org.graalvm.compiler.api.replacements.SnippetReflectionProvider; 34import org.graalvm.compiler.core.common.util.ModuleAPI; 35import org.graalvm.compiler.graph.Graph; 36import org.graalvm.compiler.nodes.ConstantNode; 37import jdk.vm.ci.meta.JavaConstant; 38import jdk.vm.ci.meta.JavaKind; 39import jdk.vm.ci.meta.MetaUtil; 40import jdk.vm.ci.meta.ResolvedJavaMethod; 41import jdk.vm.ci.runtime.JVMCI; 42import jdk.vm.ci.services.Services; 43 44interface GraphPrinter extends Closeable { 45 46 /** 47 * Starts a new group of graphs with the given name, short name and method byte code index (BCI) 48 * as properties. 49 */ 50 void beginGroup(String name, String shortName, ResolvedJavaMethod method, int bci, Map<Object, Object> properties) throws IOException; 51 52 /** 53 * Prints an entire {@link Graph} with the specified title, optionally using short names for 54 * nodes. 55 */ 56 void print(Graph graph, String title, Map<Object, Object> properties) throws IOException; 57 58 SnippetReflectionProvider getSnippetReflectionProvider(); 59 60 void setSnippetReflectionProvider(SnippetReflectionProvider snippetReflection); 61 62 /** 63 * Ends the current group. 64 */ 65 void endGroup() throws IOException; 66 67 @Override 68 void close(); 69 70 /** 71 * A JVMCI package {@linkplain Services#exportJVMCITo(Class) dynamically exported} to trusted 72 * modules. 73 */ 74 String JVMCI_RUNTIME_PACKAGE = JVMCI.class.getPackage().getName(); 75 76 /** 77 * {@code jdk.vm.ci} module. 78 */ 79 Object JVMCI_MODULE = JAVA_SPECIFICATION_VERSION < 9 ? null : ModuleAPI.getModule.invoke(Services.class); 80 81 /** 82 * Classes whose {@link #toString()} method does not run any untrusted code. 83 */ 84 List<Class<?>> TRUSTED_CLASSES = Arrays.asList( 85 String.class, 86 Class.class, 87 Boolean.class, 88 Byte.class, 89 Character.class, 90 Short.class, 91 Integer.class, 92 Float.class, 93 Long.class, 94 Double.class); 95 int MAX_CONSTANT_TO_STRING_LENGTH = 50; 96 97 /** 98 * Determines if invoking {@link Object#toString()} on an instance of {@code c} will only run 99 * trusted code. 100 */ 101 static boolean isToStringTrusted(Class<?> c) { 102 if (TRUSTED_CLASSES.contains(c)) { 103 return true; 104 } 105 if (JAVA_SPECIFICATION_VERSION < 9) { 106 if (c.getClassLoader() == Services.class.getClassLoader()) { 107 // Loaded by the JVMCI class loader 108 return true; 109 } 110 } else { 111 Object module = ModuleAPI.getModule.invoke(c); 112 if (JVMCI_MODULE == module || (Boolean) ModuleAPI.isExportedTo.invoke(JVMCI_MODULE, JVMCI_RUNTIME_PACKAGE, module)) { 113 // Can access non-statically-exported package in JVMCI 114 return true; 115 } 116 } 117 return false; 118 } 119 120 /** 121 * Sets or updates the {@code "rawvalue"} and {@code "toString"} properties in {@code props} for 122 * {@code cn} if it's a boxed Object value and {@code snippetReflection} can access the raw 123 * value. 124 */ 125 default void updateStringPropertiesForConstant(Map<Object, Object> props, ConstantNode cn) { 126 SnippetReflectionProvider snippetReflection = getSnippetReflectionProvider(); 127 if (snippetReflection != null && cn.getValue() instanceof JavaConstant) { 128 JavaConstant constant = (JavaConstant) cn.getValue(); 129 if (constant.getJavaKind() == JavaKind.Object) { 130 Object obj = snippetReflection.asObject(Object.class, constant); 131 if (obj != null) { 132 String toString = GraphPrinter.constantToString(obj); 133 String rawvalue = GraphPrinter.truncate(toString); 134 // Overwrite the value inserted by 135 // ConstantNode.getDebugProperties() 136 props.put("rawvalue", rawvalue); 137 if (!rawvalue.equals(toString)) { 138 props.put("toString", toString); 139 } 140 } 141 } 142 } 143 } 144 145 static String truncate(String s) { 146 if (s.length() > MAX_CONSTANT_TO_STRING_LENGTH) { 147 return s.substring(0, MAX_CONSTANT_TO_STRING_LENGTH - 3) + "..."; 148 } 149 return s; 150 } 151 152 static String constantToString(Object value) { 153 Class<?> c = value.getClass(); 154 if (c.isArray()) { 155 return constantArrayToString(value); 156 } else if (value instanceof Enum) { 157 return ((Enum<?>) value).name(); 158 } else if (isToStringTrusted(c)) { 159 return value.toString(); 160 } 161 return MetaUtil.getSimpleName(c, true) + "@" + System.identityHashCode(value); 162 163 } 164 165 static String constantArrayToString(Object array) { 166 Class<?> componentType = array.getClass().getComponentType(); 167 assert componentType != null; 168 int arrayLength = Array.getLength(array); 169 StringBuilder buf = new StringBuilder(MetaUtil.getSimpleName(componentType, true)).append('[').append(arrayLength).append("]{"); 170 int length = arrayLength; 171 boolean primitive = componentType.isPrimitive(); 172 for (int i = 0; i < length; i++) { 173 if (primitive) { 174 buf.append(Array.get(array, i)); 175 } else { 176 Object o = ((Object[]) array)[i]; 177 buf.append(o == null ? "null" : constantToString(o)); 178 } 179 if (i != length - 1) { 180 buf.append(", "); 181 } 182 } 183 return buf.append('}').toString(); 184 } 185} 186