changeset 9659:3620fd5fcc4c

8032400: JSR292: invokeSpecial: InternalError attempting to lookup a method Reviewed-by: psandoz, jrose
author vlivanov
date Mon, 09 Jun 2014 15:40:40 +0400
parents 83e7a5033bd8
children 38e5bb45399c
files src/share/classes/java/lang/invoke/MethodHandles.java test/java/lang/invoke/lookup/SpecialStatic.java
diffstat 2 files changed, 209 insertions(+), 8 deletions(-) [+]
line wrap: on
line diff
--- a/src/share/classes/java/lang/invoke/MethodHandles.java	Sat Jun 07 00:17:02 2014 +0800
+++ b/src/share/classes/java/lang/invoke/MethodHandles.java	Mon Jun 09 15:40:40 2014 +0400
@@ -1611,23 +1611,30 @@
                 checkSecurityManager(refc, method);
             assert(!method.isMethodHandleInvoke());
 
-            Class<?> refcAsSuper;
             if (refKind == REF_invokeSpecial &&
                 refc != lookupClass() &&
                 !refc.isInterface() &&
-                refc != (refcAsSuper = lookupClass().getSuperclass()) &&
+                refc != lookupClass().getSuperclass() &&
                 refc.isAssignableFrom(lookupClass())) {
                 assert(!method.getName().equals("<init>"));  // not this code path
                 // Per JVMS 6.5, desc. of invokespecial instruction:
                 // If the method is in a superclass of the LC,
                 // and if our original search was above LC.super,
-                // repeat the search (symbolic lookup) from LC.super.
+                // repeat the search (symbolic lookup) from LC.super
+                // and continue with the direct superclass of that class,
+                // and so forth, until a match is found or no further superclasses exist.
                 // FIXME: MemberName.resolve should handle this instead.
-                MemberName m2 = new MemberName(refcAsSuper,
-                                               method.getName(),
-                                               method.getMethodType(),
-                                               REF_invokeSpecial);
-                m2 = IMPL_NAMES.resolveOrNull(refKind, m2, lookupClassOrNull());
+                Class<?> refcAsSuper = lookupClass();
+                MemberName m2;
+                do {
+                    refcAsSuper = refcAsSuper.getSuperclass();
+                    m2 = new MemberName(refcAsSuper,
+                                        method.getName(),
+                                        method.getMethodType(),
+                                        REF_invokeSpecial);
+                    m2 = IMPL_NAMES.resolveOrNull(refKind, m2, lookupClassOrNull());
+                } while (m2 == null &&         // no method is found yet
+                         refc != refcAsSuper); // search up to refc
                 if (m2 == null)  throw new InternalError(method.toString());
                 method = m2;
                 refc = refcAsSuper;
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/java/lang/invoke/lookup/SpecialStatic.java	Mon Jun 09 15:40:40 2014 +0400
@@ -0,0 +1,194 @@
+/*
+ * 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.
+ */
+
+/* @test
+ * @bug 8032400
+ * @summary JSR292: invokeSpecial: InternalError attempting to lookup a method
+ * @compile -XDignore.symbol.file SpecialStatic.java
+ * @run junit test.java.lang.invoke.lookup.SpecialStatic
+ */
+package test.java.lang.invoke.lookup;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import jdk.internal.org.objectweb.asm.*;
+import org.junit.Test;
+import static jdk.internal.org.objectweb.asm.Opcodes.*;
+import static org.junit.Assert.*;
+
+/**
+ * Test case:
+ *   class T1            {        int m() { return 1; }}
+ *   class T2 extends T1 { static int m() { return 2; }}
+ *   class T3 extends T2 {        int m() { return 3; }}
+ *
+ *   T3::test { invokespecial T1.m() T3 } ==> T1::m
+ */
+public class SpecialStatic {
+    static class CustomClassLoader extends ClassLoader {
+        public Class<?> loadClass(String name) throws ClassNotFoundException {
+            if (findLoadedClass(name) != null) {
+                return findLoadedClass(name);
+            }
+
+            if ("T1".equals(name)) {
+                byte[] classFile = dumpT1();
+                return defineClass("T1", classFile, 0, classFile.length);
+            }
+            if ("T2".equals(name)) {
+                byte[] classFile = dumpT2();
+                return defineClass("T2", classFile, 0, classFile.length);
+            }
+            if ("T3".equals(name)) {
+                byte[] classFile = dumpT3();
+                return defineClass("T3", classFile, 0, classFile.length);
+            }
+
+            return super.loadClass(name);
+        }
+    }
+
+    private static ClassLoader cl = new CustomClassLoader();
+    private static Class t1, t3;
+    static {
+        try {
+            t1 = cl.loadClass("T1");
+            t3 = cl.loadClass("T3");
+        } catch (ClassNotFoundException e) {
+            throw new Error(e);
+        }
+    }
+
+    public static void main(String[] args) throws Throwable {
+        SpecialStatic test = new SpecialStatic();
+        test.testConstant();
+        test.testFindSpecial();
+    }
+
+    @Test
+    public void testConstant() throws Throwable {
+        MethodHandle mh = (MethodHandle)t3.getDeclaredMethod("getMethodHandle").invoke(null);
+        int result = (int)mh.invoke(t3.newInstance());
+        assertEquals(result, 1); // T1.m should be invoked.
+    }
+
+    @Test
+    public void testFindSpecial() throws Throwable {
+        MethodHandles.Lookup lookup = (MethodHandles.Lookup)t3.getDeclaredMethod("getLookup").invoke(null);
+        MethodHandle mh = lookup.findSpecial(t1, "m", MethodType.methodType(int.class), t3);
+        int result = (int)mh.invoke(t3.newInstance());
+        assertEquals(result, 1); // T1.m should be invoked.
+    }
+
+    public static byte[] dumpT1() {
+        ClassWriter cw = new ClassWriter(0);
+        MethodVisitor mv;
+
+        cw.visit(52, ACC_PUBLIC + ACC_SUPER, "T1", null, "java/lang/Object", null);
+
+        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
+        mv.visitCode();
+        mv.visitVarInsn(ALOAD, 0);
+        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
+        mv.visitInsn(RETURN);
+        mv.visitMaxs(1, 1);
+        mv.visitEnd();
+
+        mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null);
+        mv.visitCode();
+        mv.visitIntInsn(BIPUSH, 1);
+        mv.visitInsn(IRETURN);
+        mv.visitMaxs(1, 1);
+        mv.visitEnd();
+
+        cw.visitEnd();
+        return cw.toByteArray();
+    }
+
+    public static byte[] dumpT2() {
+        ClassWriter cw = new ClassWriter(0);
+        MethodVisitor mv;
+
+        cw.visit(52, ACC_PUBLIC + ACC_SUPER, "T2", null, "T1", null);
+
+        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
+        mv.visitCode();
+        mv.visitVarInsn(ALOAD, 0);
+        mv.visitMethodInsn(INVOKESPECIAL, "T1", "<init>", "()V", false);
+        mv.visitInsn(RETURN);
+        mv.visitMaxs(1, 1);
+        mv.visitEnd();
+
+        mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "m", "()I", null, null);
+        mv.visitCode();
+        mv.visitIntInsn(BIPUSH, 2);
+        mv.visitInsn(IRETURN);
+        mv.visitMaxs(1, 1);
+        mv.visitEnd();
+
+        cw.visitEnd();
+        return cw.toByteArray();
+    }
+
+    public static byte[] dumpT3() {
+        ClassWriter cw = new ClassWriter(0);
+        MethodVisitor mv;
+
+        cw.visit(52, ACC_PUBLIC + ACC_SUPER, "T3", null, "T2", null);
+
+        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
+        mv.visitCode();
+        mv.visitVarInsn(ALOAD, 0);
+        mv.visitMethodInsn(INVOKESPECIAL, "T2", "<init>", "()V", false);
+        mv.visitInsn(RETURN);
+        mv.visitMaxs(1, 1);
+        mv.visitEnd();
+
+        mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null);
+        mv.visitCode();
+        mv.visitIntInsn(BIPUSH, 3);
+        mv.visitInsn(IRETURN);
+        mv.visitMaxs(1, 1);
+        mv.visitEnd();
+
+        // getMethodHandle
+        mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "getMethodHandle", "()Ljava/lang/invoke/MethodHandle;", null, null);
+        mv.visitCode();
+        mv.visitLdcInsn(new Handle(H_INVOKESPECIAL, "T1", "m", "()I"));
+        mv.visitInsn(ARETURN);
+        mv.visitMaxs(1, 0);
+        mv.visitEnd();
+
+        // getLookup
+        mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "getLookup", "()Ljava/lang/invoke/MethodHandles$Lookup;", null, null);
+        mv.visitCode();
+        mv.visitMethodInsn(INVOKESTATIC, "java/lang/invoke/MethodHandles", "lookup", "()Ljava/lang/invoke/MethodHandles$Lookup;", false);
+        mv.visitInsn(ARETURN);
+        mv.visitMaxs(1, 0);
+        mv.visitEnd();
+
+        cw.visitEnd();
+        return cw.toByteArray();
+    }
+}