Mercurial > hg > graal-compiler
view graal/com.oracle.max.criutils/src/com/oracle/max/criutils/JniMangle.java @ 5629:26a060cc58ca
Initial implementation of closed world analysis by iteratively expanding the universe starting at method entry points.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 16 Jun 2012 00:06:48 +0200 |
parents | b4c406861c33 |
children | 4d7175cf3526 |
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/* * Copyright (c) 2007, 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.max.criutils; import com.oracle.graal.api.meta.*; /** * A utility for mangling Java method name and signatures into C function names. * * @see "http://java.sun.com/j2se/1.5.0/docs/guide/jni/spec/design.html#wp615" */ public final class JniMangle { private JniMangle() { } /** * Mangles a given string such that it can be represented as (part of) a valid C function name. */ private static String mangle(String name) { final StringBuilder mangledName = new StringBuilder(100); final int length = name.length(); for (int i = 0; i < length; i++) { final char ch = name.charAt(i); if (isAlphaNumeric(ch)) { mangledName.append(ch); } else if (ch == '_') { mangledName.append("_1"); } else if (ch == '.') { mangledName.append("_"); } else if (ch == ';') { mangledName.append("_2"); } else if (ch == '[') { mangledName.append("_3"); } else { mangledName.append(String.format("%04x", (int) ch)); } } return mangledName.toString(); } /** * The delimiter in the string returned by {@link #mangleMethod(TypeDescriptor, String, SignatureDescriptor, boolean)} separating * the short mangled form from the suffix to be added to obtain the long mangled form. */ public static final char LONG_NAME_DELIMITER = ' '; /** * Mangles a Java method to the symbol(s) to be used when binding it to a native function. * If {@code signature} is {@code null}, then a non-qualified symbol is returned. * Otherwise, a qualified symbol is returned. A qualified symbol has its non-qualified * prefix separated from its qualifying suffix by {@link #LONG_NAME_DELIMITER} if * {@code splitSuffix} is {@code true}. * * @param declaringClass a fully qualified class descriptor * @param name a Java method name (not checked here for validity) * @param signature if non-null, a method signature to include in the mangled name * @param splitSuffix determines if {@link #LONG_NAME_DELIMITER} should be used as described above * @return the symbol for the C function as described above */ public static String mangleMethod(ResolvedJavaType declaringClass, String name, Signature signature, boolean splitSuffix) { final StringBuilder result = new StringBuilder(100); final String declaringClassName = MetaUtil.toJavaName(declaringClass); result.append("Java_").append(mangle(declaringClassName)).append('_').append(mangle(name)); if (signature != null) { if (splitSuffix) { result.append(LONG_NAME_DELIMITER); } result.append("__"); final String sig = signature.asString(); final String parametersSignature = sig.substring(1, sig.lastIndexOf(')')).replace('/', '.').replace('$', '.'); result.append(mangle(parametersSignature)); } return result.toString(); } private static boolean isAlphaNumeric(char ch) { return (ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || (ch >= '0' && ch <= '9'); } }