| /* |
| * Copyright (c) 2012, 2015, 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 jdk.vm.ci.meta; |
| |
| /** |
| * Miscellaneous collection of utility methods used by {@code jdk.vm.ci.meta} and its clients. |
| */ |
| public class MetaUtil { |
| |
| /** |
| * Extends the functionality of {@link Class#getSimpleName()} to include a non-empty string for |
| * anonymous and local classes. |
| * |
| * @param clazz the class for which the simple name is being requested |
| * @param withEnclosingClass specifies if the returned name should be qualified with the name(s) |
| * of the enclosing class/classes of {@code clazz} (if any). This option is ignored |
| * if {@code clazz} denotes an anonymous or local class. |
| * @return the simple name |
| */ |
| public static String getSimpleName(Class<?> clazz, boolean withEnclosingClass) { |
| final String simpleName = clazz.getSimpleName(); |
| if (simpleName.length() != 0) { |
| if (withEnclosingClass) { |
| String prefix = ""; |
| Class<?> enclosingClass = clazz; |
| while ((enclosingClass = enclosingClass.getEnclosingClass()) != null) { |
| prefix = enclosingClass.getSimpleName() + "." + prefix; |
| } |
| return prefix + simpleName; |
| } |
| return simpleName; |
| } |
| // Must be an anonymous or local class |
| final String name = clazz.getName(); |
| int index = name.indexOf('$'); |
| if (index == -1) { |
| return name; |
| } |
| index = name.lastIndexOf('.', index); |
| if (index == -1) { |
| return name; |
| } |
| return name.substring(index + 1); |
| } |
| |
| /** |
| * Converts a type name in internal form to an external form. |
| * |
| * @param name the internal name to convert |
| * @param qualified whether the returned name should be qualified with the package name |
| * @param classForNameCompatible specifies if the returned name for array types should be in |
| * {@link Class#forName(String)} format (e.g., {@code "[Ljava.lang.Object;"}, |
| * {@code "[[I"}) or in Java source code format (e.g., {@code "java.lang.Object[]"}, |
| * {@code "int[][]"} ). |
| */ |
| public static String internalNameToJava(String name, boolean qualified, boolean classForNameCompatible) { |
| switch (name.charAt(0)) { |
| case 'L': { |
| String result = name.substring(1, name.length() - 1).replace('/', '.'); |
| if (!qualified) { |
| final int lastDot = result.lastIndexOf('.'); |
| if (lastDot != -1) { |
| result = result.substring(lastDot + 1); |
| } |
| } |
| return result; |
| } |
| case '[': |
| return classForNameCompatible ? name.replace('/', '.') : internalNameToJava(name.substring(1), qualified, classForNameCompatible) + "[]"; |
| default: |
| if (name.length() != 1) { |
| throw new IllegalArgumentException("Illegal internal name: " + name); |
| } |
| return JavaKind.fromPrimitiveOrVoidTypeChar(name.charAt(0)).getJavaName(); |
| } |
| } |
| |
| /** |
| * Convenient shortcut for calling |
| * {@link #appendLocation(StringBuilder, ResolvedJavaMethod, int)} without having to supply a |
| * {@link StringBuilder} instance and convert the result to a string. |
| */ |
| public static String toLocation(ResolvedJavaMethod method, int bci) { |
| return appendLocation(new StringBuilder(), method, bci).toString(); |
| } |
| |
| /** |
| * Appends a string representation of a location specified by a given method and bci to a given |
| * {@link StringBuilder}. If a stack trace element with a non-null file name and non-negative |
| * line number is {@linkplain ResolvedJavaMethod#asStackTraceElement(int) available} for the |
| * given method, then the string returned is the {@link StackTraceElement#toString()} value of |
| * the stack trace element, suffixed by the bci location. For example: |
| * |
| * <pre> |
| * java.lang.String.valueOf(String.java:2930) [bci: 12] |
| * </pre> |
| * |
| * Otherwise, the string returned is the value of applying {@link JavaMethod#format(String)} |
| * with the format string {@code "%H.%n(%p)"}, suffixed by the bci location. For example: |
| * |
| * <pre> |
| * java.lang.String.valueOf(int) [bci: 12] |
| * </pre> |
| * |
| * @param sb |
| * @param method |
| * @param bci |
| */ |
| public static StringBuilder appendLocation(StringBuilder sb, ResolvedJavaMethod method, int bci) { |
| if (method != null) { |
| StackTraceElement ste = method.asStackTraceElement(bci); |
| if (ste.getFileName() != null && ste.getLineNumber() > 0) { |
| sb.append(ste); |
| } else { |
| sb.append(method.format("%H.%n(%p)")); |
| } |
| } else { |
| sb.append("Null method"); |
| } |
| return sb.append(" [bci: ").append(bci).append(']'); |
| } |
| |
| static void appendProfile(StringBuilder buf, AbstractJavaProfile<?, ?> profile, int bci, String type, String sep) { |
| if (profile != null) { |
| AbstractProfiledItem<?>[] pitems = profile.getItems(); |
| if (pitems != null) { |
| buf.append(String.format("%s@%d:", type, bci)); |
| for (int j = 0; j < pitems.length; j++) { |
| AbstractProfiledItem<?> pitem = pitems[j]; |
| buf.append(String.format(" %.6f (%s)%s", pitem.getProbability(), pitem.getItem(), sep)); |
| } |
| if (profile.getNotRecordedProbability() != 0) { |
| buf.append(String.format(" %.6f <other %s>%s", profile.getNotRecordedProbability(), type, sep)); |
| } else { |
| buf.append(String.format(" <no other %s>%s", type, sep)); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Converts a Java source-language class name into the internal form. |
| * |
| * @param className the class name |
| * @return the internal name form of the class name |
| */ |
| public static String toInternalName(String className) { |
| if (className.startsWith("[")) { |
| /* Already in the correct array style. */ |
| return className.replace('.', '/'); |
| } |
| |
| StringBuilder result = new StringBuilder(); |
| String base = className; |
| while (base.endsWith("[]")) { |
| result.append("["); |
| base = base.substring(0, base.length() - 2); |
| } |
| |
| switch (base) { |
| case "boolean": |
| result.append("Z"); |
| break; |
| case "byte": |
| result.append("B"); |
| break; |
| case "short": |
| result.append("S"); |
| break; |
| case "char": |
| result.append("C"); |
| break; |
| case "int": |
| result.append("I"); |
| break; |
| case "float": |
| result.append("F"); |
| break; |
| case "long": |
| result.append("J"); |
| break; |
| case "double": |
| result.append("D"); |
| break; |
| case "void": |
| result.append("V"); |
| break; |
| default: |
| result.append("L").append(base.replace('.', '/')).append(";"); |
| break; |
| } |
| return result.toString(); |
| } |
| |
| /** |
| * Gets a string representation of an object based soley on its class and its |
| * {@linkplain System#identityHashCode(Object) identity hash code}. This avoids and calls to |
| * virtual methods on the object such as {@link Object#hashCode()}. |
| */ |
| public static String identityHashCodeString(Object obj) { |
| if (obj == null) { |
| return "null"; |
| } |
| return obj.getClass().getName() + "@" + System.identityHashCode(obj); |
| } |
| } |
