eb2c6c52bb
Co-authored-by: Brent Christian <brent.christian@oracle.com> Co-authored-by: Daniel Fuchs <daniel.fuchs@oracle.com> Co-authored-by: Hamlin Li <huaming.li@oracle.com> Reviewed-by: coleenp, dfuchs, bchristi, psandoz, sspitsyn
119 lines
4.3 KiB
Java
119 lines
4.3 KiB
Java
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8020968
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* @summary Sanity test for locals and operands
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* @run main LocalsAndOperands
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*/
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import java.lang.StackWalker.StackFrame;
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import java.lang.reflect.*;
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import java.util.List;
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import java.util.stream.Collectors;
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public class LocalsAndOperands {
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static Class<?> liveStackFrameClass;
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static Class<?> primitiveValueClass;
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static StackWalker extendedWalker;
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static Method getLocals;
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static Method getOperands;
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static Method getMonitors;
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static Method primitiveType;
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public static void main(String... args) throws Exception {
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liveStackFrameClass = Class.forName("java.lang.LiveStackFrame");
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primitiveValueClass = Class.forName("java.lang.LiveStackFrame$PrimitiveValue");
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getLocals = liveStackFrameClass.getDeclaredMethod("getLocals");
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getLocals.setAccessible(true);
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getOperands = liveStackFrameClass.getDeclaredMethod("getStack");
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getOperands.setAccessible(true);
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getMonitors = liveStackFrameClass.getDeclaredMethod("getMonitors");
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getMonitors.setAccessible(true);
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primitiveType = primitiveValueClass.getDeclaredMethod("type");
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primitiveType.setAccessible(true);
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Method method = liveStackFrameClass.getMethod("getStackWalker");
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method.setAccessible(true);
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extendedWalker = (StackWalker) method.invoke(null);
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new LocalsAndOperands(extendedWalker, true).test();
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// no access to local and operands.
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new LocalsAndOperands(StackWalker.getInstance(), false).test();
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}
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private final StackWalker walker;
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private final boolean extended;
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LocalsAndOperands(StackWalker walker, boolean extended) {
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this.walker = walker;
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this.extended = extended;
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}
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synchronized void test() throws Exception {
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int x = 10;
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char c = 'z';
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String hi = "himom";
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long l = 1000000L;
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double d = 3.1415926;
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List<StackWalker.StackFrame> frames = walker.walk(s -> s.collect(Collectors.toList()));
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if (extended) {
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for (StackWalker.StackFrame f : frames) {
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System.out.println("frame: " + f);
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Object[] locals = (Object[]) getLocals.invoke(f);
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for (int i = 0; i < locals.length; i++) {
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System.out.format("local %d: %s type %s%n", i, locals[i], type(locals[i]));
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}
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Object[] operands = (Object[]) getOperands.invoke(f);
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for (int i = 0; i < operands.length; i++) {
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System.out.format("operand %d: %s type %s%n", i, operands[i], type(operands[i]));
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}
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Object[] monitors = (Object[]) getMonitors.invoke(f);
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for (int i = 0; i < monitors.length; i++) {
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System.out.format("monitor %d: %s%n", i, monitors[i]);
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}
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}
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} else {
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for (StackFrame f : frames) {
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if (liveStackFrameClass.isInstance(f))
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throw new RuntimeException("should not be LiveStackFrame");
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}
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}
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}
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String type(Object o) throws Exception {
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if (primitiveValueClass.isInstance(o)) {
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char c = (char)primitiveType.invoke(o);
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return String.valueOf(c);
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} else {
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return o.getClass().getName();
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}
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}
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}
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