150 lines
6.1 KiB
Java
150 lines
6.1 KiB
Java
/*
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* Copyright (c) 2009, 2019, 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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package invokespecial;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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public class Checker extends shared.Checker {
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public Checker(Class staticTargetClass, Class dynamicTargetClass) {
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super(staticTargetClass, dynamicTargetClass);
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}
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public String check (Class callerClass) {
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// If objectref is null, the invokespecial instruction throws a NullPointerException.
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if (dynamicTargetClass == null) {
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return "java.lang.NullPointerException";
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}
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// TODO: find a citation from spec for this case
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Method resolvedMethod;
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try {
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// May throw VerifyError
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resolvedMethod = getMethodInHierarchy(staticTargetClass);
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} catch (Throwable e) {
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return e.getClass().getName();
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}
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if (resolvedMethod == null) {
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return "java.lang.NoSuchMethodError";
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}
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// If:
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// - the resolved method is protected (4.7)
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// - it is a member of a superclass of the current class
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// - the method is not declared in the same run-time package (5.3) as the current class
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// then:
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// the class of objectref must be either the current class or a subclass of the
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// current class.
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if (Modifier.isProtected(resolvedMethod.getModifiers())) {
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Method methodInSuperclass = getMethodInHierarchy(resolvedMethod.getDeclaringClass().getSuperclass());
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if (methodInSuperclass != null) {
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String resolvedMethodPkg = getClassPackageName(resolvedMethod.getDeclaringClass());
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String methodInSuperclassPkg = getClassPackageName(methodInSuperclass.getDeclaringClass());
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if (!resolvedMethodPkg.equals(methodInSuperclassPkg)) {
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//TODO: clarify this
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// if (callerClass == methodInSuperclass.getDeclaringClass()) {
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// return "java.lang.IllegalAccessError";
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// }
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}
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}
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}
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/*
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* The resolved method is selected for invocation unless all of
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* the following conditions are true:
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* * TODO: The ACC_SUPER flag (see Table 4.1, "Class access and property
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* modifiers") is set for the current class.
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* * The class of the resolved method is a superclass of the
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* current class - assumed by construction procedure
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*
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* * The resolved method is not an instance initialization method (3.9).
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*/
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if (!"<init>".equals(methodName)) {
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/*
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* Let C be the direct superclass of the current class:
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* * If C contains a declaration for an instance method with the same
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* name and descriptor as the resolved method, then this method will be
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* invoked. The lookup procedure terminates.
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* * Otherwise, if C has a superclass, this same lookup procedure is
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* performed recursively using the direct superclass of C. The method to
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* be invoked is the result of the recursive invocation of this lookup
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* procedure.
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* * Otherwise, an AbstractMethodError is raised.
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* TODO: so far, sometimes NSME is thrown
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*/
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Class klass = dynamicTargetClass.getSuperclass();
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while (klass != Object.class) {
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Method method = getDeclaredMethod(klass);
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if (method != null) {
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/*
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* If the resolved method is a class (static) method, the
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* invokespecial instruction throws an IncompatibleClassChangeError.
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*/
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if (Modifier.isStatic(method.getModifiers())) {
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return "java.lang.IncompatibleClassChangeError";
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}
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// Check access rights
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if ( checkAccess(method, callerClass)
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// && !(
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// Modifier.isProtected(method.getModifiers())
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// && (
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// staticTargetClass.isAssignableFrom(callerClass)
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// || getClassPackageName(staticTargetClass).equals(getClassPackageName(callerClass))
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// )
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//
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// )
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)
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{
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return String.format("%s.%s"
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, method.getDeclaringClass().getSimpleName()
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, methodName
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);
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} else {
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// IAE is thrown when located method can't be accessed from the call site
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return "java.lang.IllegalAccessError";
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}
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}
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klass = klass.getSuperclass();
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}
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return "java.lang.AbstractMethodError";
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} else {
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// The resolved method is an instance initialization method (3.9).
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}
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// TODO: change
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return "---";
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}
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}
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