undefect. CWE-407 — 63 sites patched across 27 ecosystems
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
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371
test/jdk/java/lang/invoke/PrivateInvokeTest.java
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371
test/jdk/java/lang/invoke/PrivateInvokeTest.java
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/*
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* Copyright (c) 2009, 2024, 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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/* @test
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* @summary white-box testing of method handle sub-primitives
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* @modules java.base/java.lang.invoke:open
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* @run junit test.java.lang.invoke.PrivateInvokeTest
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*/
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package test.java.lang.invoke;
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import java.lang.invoke.*;
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import static java.lang.invoke.MethodHandles.*;
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import static java.lang.invoke.MethodType.*;
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import java.lang.reflect.*;
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import java.util.ArrayList;
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import java.util.Arrays;
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import org.junit.*;
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import static org.junit.Assert.*;
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public class PrivateInvokeTest {
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// Utility functions
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private static final Lookup LOOKUP = lookup();
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private static final Class<?> THIS_CLASS = PrivateInvokeTest.class;
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private static final int
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REF_NONE = 0, // null value
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REF_getField = 1,
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REF_getStatic = 2,
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REF_putField = 3,
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REF_putStatic = 4,
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REF_invokeVirtual = 5,
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REF_invokeStatic = 6,
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REF_invokeSpecial = 7,
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REF_newInvokeSpecial = 8,
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REF_invokeInterface = 9,
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REF_LIMIT = 10,
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REF_MH_invokeBasic = REF_NONE;;
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private static final String[] REF_KIND_NAMES = {
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"MH::invokeBasic",
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"REF_getField", "REF_getStatic", "REF_putField", "REF_putStatic",
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"REF_invokeVirtual", "REF_invokeStatic", "REF_invokeSpecial",
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"REF_newInvokeSpecial", "REF_invokeInterface"
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};
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private int verbose;
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//{ verbose = 99; } // for debugging
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{
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String vstr = System.getProperty(THIS_CLASS.getSimpleName()+".verbose");
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if (vstr == null)
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vstr = System.getProperty(THIS_CLASS.getName()+".verbose");
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if (vstr != null) verbose = Integer.parseInt(vstr);
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}
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private static int referenceKind(Method m) {
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if (Modifier.isStatic(m.getModifiers()))
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return REF_invokeStatic;
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else if (m.getDeclaringClass().isInterface())
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return REF_invokeInterface;
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else if (Modifier.isFinal(m.getModifiers()) ||
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Modifier.isFinal(m.getDeclaringClass().getModifiers()))
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return REF_invokeSpecial;
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else
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return REF_invokeVirtual;
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}
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private static MethodType basicType(MethodType mtype) {
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MethodType btype = mtype.erase();
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if (btype.hasPrimitives()) {
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for (int i = -1; i < mtype.parameterCount(); i++) {
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Class<?> type = (i < 0 ? mtype.returnType() : mtype.parameterType(i));
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if (type == boolean.class ||
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type == byte.class ||
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type == char.class ||
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type == short.class) {
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type = int.class;
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if (i < 0)
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btype = btype.changeReturnType(type);
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else
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btype = btype.changeParameterType(i, type);
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}
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}
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}
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return btype;
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}
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private static Method getMethod(Class<?> defc, String name, Class<?>... ptypes) {
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try {
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return defc.getDeclaredMethod(name, ptypes);
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} catch (NoSuchMethodException ex) {
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}
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try {
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return defc.getMethod(name, ptypes);
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} catch (NoSuchMethodException ex) {
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throw new IllegalArgumentException(ex);
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}
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}
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private static MethodHandle unreflect(Method m) {
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try {
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MethodHandle mh = LOOKUP.unreflect(m);
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if (Modifier.isTransient(m.getModifiers()))
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mh = mh.asFixedArity(); // remove varargs wrapper
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return mh;
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} catch (IllegalAccessException ex) {
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throw new IllegalArgumentException(ex);
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}
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}
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private static final Lookup DIRECT_INVOKER_LOOKUP;
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private static final Class<?> MEMBER_NAME_CLASS;
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private static final MethodHandle MH_INTERNAL_MEMBER_NAME;
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private static final MethodHandle MH_DEBUG_STRING;
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static {
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try {
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// This is white box testing. Use reflection to grab private implementation bits.
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String magicName = "IMPL_LOOKUP";
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Field magicLookup = MethodHandles.Lookup.class.getDeclaredField(magicName);
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// This unit test will fail if a security manager is installed.
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magicLookup.setAccessible(true);
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// Forbidden fruit...
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DIRECT_INVOKER_LOOKUP = (Lookup) magicLookup.get(null);
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MEMBER_NAME_CLASS = Class.forName("java.lang.invoke.MemberName", false, MethodHandle.class.getClassLoader());
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MH_INTERNAL_MEMBER_NAME = DIRECT_INVOKER_LOOKUP
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.findVirtual(MethodHandle.class, "internalMemberName", methodType(MEMBER_NAME_CLASS))
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.asType(methodType(Object.class, MethodHandle.class));
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MH_DEBUG_STRING = DIRECT_INVOKER_LOOKUP
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.findVirtual(MethodHandle.class, "debugString", methodType(String.class));
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} catch (ReflectiveOperationException ex) {
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throw new Error(ex);
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}
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}
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private Object internalMemberName(MethodHandle mh) {
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try {
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return MH_INTERNAL_MEMBER_NAME.invokeExact(mh);
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} catch (Throwable ex) {
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throw new Error(ex);
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}
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}
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private String debugString(MethodHandle mh) {
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try {
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return (String) MH_DEBUG_STRING.invokeExact(mh);
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} catch (Throwable ex) {
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throw new Error(ex);
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}
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}
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private static MethodHandle directInvoker(int refKind, MethodType mtype) {
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return directInvoker(REF_KIND_NAMES[refKind], mtype);
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}
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private static MethodHandle directInvoker(String name, MethodType mtype) {
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boolean isStatic;
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mtype = mtype.erase();
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if (name.startsWith("MH::")) {
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isStatic = false;
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name = strip("MH::", name);
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} else if (name.startsWith("REF_")) {
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isStatic = true;
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name = strip("REF_", name);
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if (name.startsWith("invoke"))
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name = "linkTo"+strip("invoke", name);
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mtype = mtype.appendParameterTypes(MEMBER_NAME_CLASS);
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} else {
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throw new AssertionError("name="+name);
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}
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//System.out.println("directInvoker = "+name+mtype);
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try {
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if (isStatic)
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return DIRECT_INVOKER_LOOKUP
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.findStatic(MethodHandle.class, name, mtype);
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else
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return DIRECT_INVOKER_LOOKUP
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.findVirtual(MethodHandle.class, name, mtype);
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} catch (ReflectiveOperationException ex) {
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throw new IllegalArgumentException(ex);
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}
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}
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private Object invokeWithArguments(Method m, Object... args) {
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Object recv = null;
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if (!Modifier.isStatic(m.getModifiers())) {
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recv = args[0];
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args = pop(1, args);
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}
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try {
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return m.invoke(recv, args);
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} catch (IllegalAccessException|IllegalArgumentException|InvocationTargetException ex) {
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throw new IllegalArgumentException(ex);
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}
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}
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private Object invokeWithArguments(MethodHandle mh, Object... args) {
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try {
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return mh.invokeWithArguments(args);
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} catch (Throwable ex) {
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throw new IllegalArgumentException(ex);
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}
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}
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private int counter;
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private Object makeArgument(Class<?> type) {
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final String cname = type.getSimpleName();
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final int n = ++counter;
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final int nn = (n << 10) + 13;
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if (type.isAssignableFrom(String.class)) {
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return "<"+cname+"#"+nn+">";
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}
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if (type == THIS_CLASS) return this.withCounter(nn);
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if (type == Integer.class || type == int.class) return nn;
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if (type == Character.class || type == char.class) return (char)(n % 100+' ');
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if (type == Byte.class || type == byte.class) return (byte)-(n % 100);
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if (type == Long.class || type == long.class) return (long)nn;
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throw new IllegalArgumentException("don't know how to make argument of type: "+type);
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}
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private Object[] makeArguments(Class<?>... ptypes) {
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Object[] args = new Object[ptypes.length];
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for (int i = 0; i < args.length; i++)
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args[i] = makeArgument(ptypes[i]);
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return args;
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}
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private Object[] makeArguments(MethodType mtype) {
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return makeArguments(mtype.parameterArray());
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}
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private Object[] pop(int n, Object[] args) {
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if (n >= 0)
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return Arrays.copyOfRange(args, n, args.length);
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else
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return Arrays.copyOfRange(args, 0, args.length+n);
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}
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private Object[] pushAtFront(Object arg1, Object[] args) {
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Object[] res = new Object[1+args.length];
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res[0] = arg1;
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System.arraycopy(args, 0, res, 1, args.length);
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return res;
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}
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private Object[] pushAtBack(Object[] args, Object argN) {
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Object[] res = new Object[1+args.length];
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System.arraycopy(args, 0, res, 0, args.length);
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res[args.length] = argN;
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return res;
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}
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private static String strip(String prefix, String s) {
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assert(s.startsWith(prefix));
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return s.substring(prefix.length());
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}
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private final int[] refKindTestCounts = new int[REF_KIND_NAMES.length];
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@After
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public void printCounts() {
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ArrayList<String> zeroes = new ArrayList<>();
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for (int i = 0; i < refKindTestCounts.length; i++) {
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final int count = refKindTestCounts[i];
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final String name = REF_KIND_NAMES[i];
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if (count == 0) {
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if (name != null) zeroes.add(name);
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continue;
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}
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if (verbose >= 0)
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System.out.println("test count for "+name+" : "+count);
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else if (name != null)
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zeroes.add(name);
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}
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if (verbose >= 0)
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System.out.println("test counts zero for "+zeroes);
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}
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// Test subjects
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public static String makeString(Object x) { return "makeString("+x+")"; }
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public static String dupString(String x) { return "("+x+"+"+x+")"; }
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public static String intString(int x) { return "intString("+x+")"; }
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public static String byteString(byte x) { return "byteString("+x+")"; }
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public static String longString(String x, long y, String z) { return "longString("+x+y+z+")"; }
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public final String toString() {
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return "<"+getClass().getSimpleName()+"#"+counter+">";
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}
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public final String hello() { return "hello from "+this; }
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private PrivateInvokeTest withCounter(int counter) {
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PrivateInvokeTest res = new PrivateInvokeTest();
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res.counter = counter;
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return res;
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}
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public static void main(String... av) throws Throwable {
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new PrivateInvokeTest().run();
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}
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public void run() throws Throwable {
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testFirst();
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testInvokeDirect();
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}
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@Test
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public void testFirst() throws Throwable {
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if (true) return; // nothing here
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try {
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System.out.println("start of testFirst");
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} finally {
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System.out.println("end of testFirst");
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}
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}
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@Test
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public void testInvokeDirect() {
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testInvokeDirect(getMethod(THIS_CLASS, "hello"));
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testInvokeDirect(getMethod(Object.class, "toString"));
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testInvokeDirect(getMethod(Comparable.class, "compareTo", Object.class));
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testInvokeDirect(getMethod(THIS_CLASS, "makeString", Object.class));
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testInvokeDirect(getMethod(THIS_CLASS, "dupString", String.class));
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testInvokeDirect(getMethod(THIS_CLASS, "intString", int.class));
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testInvokeDirect(getMethod(THIS_CLASS, "byteString", byte.class));
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testInvokeDirect(getMethod(THIS_CLASS, "longString", String.class, long.class, String.class));
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}
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void testInvokeDirect(Method m) {
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final int refKind = referenceKind(m);
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testInvokeDirect(m, refKind);
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testInvokeDirect(m, REF_MH_invokeBasic);
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}
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void testInvokeDirect(Method m, int refKind) {
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if (verbose >= 1)
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System.out.println("testInvoke m="+m+" : "+REF_KIND_NAMES[refKind]);
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final MethodHandle mh = unreflect(m);
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Object[] args = makeArguments(mh.type());
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Object res1 = invokeWithArguments(m, args);
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// res1 comes from java.lang.reflect.Method::invoke
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if (verbose >= 1)
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System.out.println("m"+Arrays.asList(args)+" => "+res1);
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// res2 comes from java.lang.invoke.MethodHandle::invoke
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Object res2 = invokeWithArguments(mh, args);
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assertEquals(res1, res2);
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MethodType mtype = mh.type();
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testInvokeVia("DMH invoker", refKind, directInvoker(refKind, mtype), mh, res1, args);
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MethodType etype = mtype.erase();
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if (etype != mtype) {
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// Try a detuned invoker.
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testInvokeVia("erased DMH invoker", refKind, directInvoker(refKind, etype), mh, res1, args);
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}
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MethodType btype = basicType(mtype);
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if (btype != mtype && btype != etype) {
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// Try a detuned invoker.
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testInvokeVia("basic DMH invoker", refKind, directInvoker(refKind, btype), mh, res1, args);
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}
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if (false) {
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// this can crash the JVM
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testInvokeVia("generic DMH invoker", refKind, directInvoker(refKind, mtype.generic()), mh, res1, args);
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}
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refKindTestCounts[refKind] += 1;
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}
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void testInvokeVia(String kind, int refKind, MethodHandle invoker, MethodHandle mh, Object res1, Object... args) {
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Object[] args1;
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if (refKind == REF_MH_invokeBasic)
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args1 = pushAtFront(mh, args);
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else
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args1 = pushAtBack(args, internalMemberName(mh));
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if (verbose >= 2) {
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System.out.println(kind+" invoker="+invoker+" mh="+debugString(mh)+" args="+Arrays.asList(args1));
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}
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Object res3 = invokeWithArguments(invoker, args1);
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assertEquals(res1, res3);
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}
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}
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