--- /dev/null 2015-10-08 07:25:30.000000000 -1000 +++ new/src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotVmSymbols.java 2015-10-08 07:25:30.000000000 -1000 @@ -0,0 +1,49 @@ +/* + * Copyright (c) 2014, 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.hotspot; + +import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.*; +import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE; + +import sun.misc.*; + +/** + * Class to access the C++ {@code vmSymbols} table. + */ +public final class HotSpotVmSymbols { + + /** + * Returns the symbol in the {@code vmSymbols} table at position {@code index} as {@link String} + * . + * + * @param index position in the symbol table + * @return the symbol at position id + */ + public static String symbolAt(int index) { + HotSpotJVMCIRuntimeProvider runtime = runtime(); + HotSpotVMConfig config = runtime.getConfig(); + assert config.vmSymbolsFirstSID <= index && index < config.vmSymbolsSIDLimit : "index " + index + " is out of bounds"; + assert config.symbolPointerSize == Unsafe.ADDRESS_SIZE : "the following address read is broken"; + return runtime.getCompilerToVM().getSymbol(UNSAFE.getAddress(config.vmSymbolsSymbols + index * config.symbolPointerSize)); + } +}