977 lines
38 KiB
Java
977 lines
38 KiB
Java
/*
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* Copyright (c) 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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* @test
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* @requires !vm.graal.enabled
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* @modules java.base/jdk.internal.org.objectweb.asm
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* java.base/jdk.internal.misc
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* java.base/jdk.internal.vm.annotation
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* @library /test/lib /
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* @build sun.hotspot.WhiteBox
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* @run driver ClassFileInstaller sun.hotspot.WhiteBox
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* sun.hotspot.WhiteBox$WhiteBoxPermission
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*
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* @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockDiagnosticVMOptions
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* -XX:+PrintCompilation -XX:+PrintInlining -XX:+TraceDependencies -verbose:class -XX:CompileCommand=quiet
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* -XX:CompileCommand=compileonly,*::test -XX:CompileCommand=compileonly,*::m -XX:CompileCommand=dontinline,*::test
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* -Xbatch -XX:+WhiteBoxAPI -Xmixed
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* -XX:-TieredCompilation
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* compiler.cha.StrengthReduceInterfaceCall
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*
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* @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockDiagnosticVMOptions
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* -XX:+PrintCompilation -XX:+PrintInlining -XX:+TraceDependencies -verbose:class -XX:CompileCommand=quiet
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* -XX:CompileCommand=compileonly,*::test -XX:CompileCommand=compileonly,*::m -XX:CompileCommand=dontinline,*::test
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* -Xbatch -XX:+WhiteBoxAPI -Xmixed
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* -XX:+TieredCompilation -XX:TieredStopAtLevel=1
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* compiler.cha.StrengthReduceInterfaceCall
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*/
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package compiler.cha;
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import jdk.internal.misc.Unsafe;
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import jdk.internal.org.objectweb.asm.ClassWriter;
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import jdk.internal.org.objectweb.asm.MethodVisitor;
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import jdk.internal.vm.annotation.DontInline;
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import sun.hotspot.WhiteBox;
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import sun.hotspot.code.NMethod;
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import java.io.IOException;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.invoke.MethodHandle;
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import java.lang.invoke.MethodHandles;
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import java.lang.reflect.Method;
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import java.util.HashMap;
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import java.util.concurrent.Callable;
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import static jdk.test.lib.Asserts.*;
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import static jdk.internal.org.objectweb.asm.ClassWriter.*;
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import static jdk.internal.org.objectweb.asm.Opcodes.*;
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public class StrengthReduceInterfaceCall {
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public static void main(String[] args) {
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run(ObjectToString.class);
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run(ObjectHashCode.class);
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run(TwoLevelHierarchyLinear.class);
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run(ThreeLevelHierarchyLinear.class);
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run(ThreeLevelHierarchyAbstractVsDefault.class);
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run(ThreeLevelDefaultHierarchy.class);
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run(ThreeLevelDefaultHierarchy1.class);
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}
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public static class ObjectToString extends ATest<ObjectToString.I> {
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public ObjectToString() { super(I.class, C.class); }
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interface J { String toString(); }
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interface I extends J {}
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static class C implements I {}
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interface K1 extends I {}
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interface K2 extends I { String toString(); } // K2.tS() ABSTRACT
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// interface K3 extends I { default String toString() { return "K3"; } // K2.tS() DEFAULT
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static class D implements I { public String toString() { return "D"; }}
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static class DJ1 implements J {}
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static class DJ2 implements J { public String toString() { return "DJ2"; }}
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@Override
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public Object test(I i) { return ObjectToStringHelper.test(i); /* invokeinterface I.toString() */ }
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@TestCase
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public void testMono() {
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// 0. Trigger compilation of a monomorphic call site
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compile(monomophic()); // C1 <: C <: intf I <: intf J <: Object.toString()
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assertCompiled();
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// Dependency: none
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call(new C() { public String toString() { return "Cn"; }}); // Cn.tS <: C.tS <: intf I
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assertCompiled();
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}
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@TestCase
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public void testBi() {
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// 0. Trigger compilation of a bimorphic call site
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compile(bimorphic()); // C1 <: C <: intf I <: intf J <: Object.toString()
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assertCompiled();
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// Dependency: none
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call(new C() { public String toString() { return "Cn"; }}); // Cn.tS <: C.tS <: intf I
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assertCompiled();
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}
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@TestCase
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public void testMega() {
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// 0. Trigger compilation of a megamorphic call site
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compile(megamorphic()); // C1,C2,C3 <: C <: intf I <: intf J <: Object.toString()
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assertCompiled();
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// Dependency: none
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// compiler.cha.StrengthReduceInterfaceCall$ObjectToString::test (5 bytes)
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// @ 1 compiler.cha.StrengthReduceInterfaceCall$ObjectToStringHelper::test (7 bytes) inline (hot)
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// @ 1 java.lang.Object::toString (36 bytes) virtual call
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// No dependency - no invalidation
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repeat(100, () -> call(new C(){})); // Cn <: C <: intf I
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assertCompiled();
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initialize(K1.class, // intf K1 <: intf I <: intf J
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K2.class, // intf K2.tS ABSTRACT <: intf I <: intf J
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DJ1.class, // DJ1 <: intf J
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DJ2.class); // DJ2.tS <: intf J
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assertCompiled();
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initialize(D.class); // D.tS <: intf I <: intf J
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assertCompiled();
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call(new C() { public String toString() { return "Cn"; }}); // Cn.tS <: C.tS <: intf I
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assertCompiled();
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}
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@Override
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public void checkInvalidReceiver() {
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shouldThrow(IncompatibleClassChangeError.class, () -> {
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I o = (I) unsafeCastMH(I.class).invokeExact(new Object()); // unrelated
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test(o);
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});
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assertCompiled();
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shouldThrow(IncompatibleClassChangeError.class, () -> {
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I j = (I) unsafeCastMH(I.class).invokeExact((Object)new J() {}); // super interface
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test(j);
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});
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assertCompiled();
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}
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}
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public static class ObjectHashCode extends ATest<ObjectHashCode.I> {
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public ObjectHashCode() { super(I.class, C.class); }
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interface J {}
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interface I extends J {}
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static class C implements I {}
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interface K1 extends I {}
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interface K2 extends I { int hashCode(); } // K2.hC() ABSTRACT
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// interface K3 extends I { default int hashCode() { return CORRECT; } // K2.hC() DEFAULT
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static class D implements I { public int hashCode() { return super.hashCode(); }}
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static class DJ1 implements J {}
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static class DJ2 implements J { public int hashCode() { return super.hashCode(); }}
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@Override
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public Object test(I i) {
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return ObjectHashCodeHelper.test(i); /* invokeinterface I.hashCode() */
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}
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@TestCase
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public void testMono() {
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// 0. Trigger compilation of a monomorphic call site
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compile(monomophic()); // C1 <: C <: intf I <: intf J <: Object.hashCode()
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assertCompiled();
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// Dependency: none
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call(new C() { public int hashCode() { return super.hashCode(); }}); // Cn.hC <: C.hC <: intf I
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assertCompiled();
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}
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@TestCase
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public void testBi() {
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// 0. Trigger compilation of a bimorphic call site
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compile(bimorphic()); // C1 <: C <: intf I <: intf J <: Object.toString()
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assertCompiled();
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// Dependency: none
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call(new C() { public int hashCode() { return super.hashCode(); }}); // Cn.hC <: C.hC <: intf I
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assertCompiled();
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}
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@TestCase
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public void testMega() {
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// 0. Trigger compilation of a megamorphic call site
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compile(megamorphic()); // C1,C2,C3 <: C <: intf I <: intf J <: Object.hashCode()
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assertCompiled();
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// Dependency: none
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// No dependency - no invalidation
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repeat(100, () -> call(new C(){})); // Cn <: C <: intf I
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assertCompiled();
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initialize(K1.class, // intf K1 <: intf I <: intf J
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K2.class, // intf K2.hC ABSTRACT <: intf I <: intf J
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DJ1.class, // DJ1 <: intf J
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DJ2.class); // DJ2.hC <: intf J
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assertCompiled();
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initialize(D.class); // D.hC <: intf I <: intf J
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assertCompiled();
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call(new C() { public int hashCode() { return super.hashCode(); }}); // Cn.hC <: C.hC <: intf I
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assertCompiled();
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}
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@Override
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public void checkInvalidReceiver() {
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shouldThrow(IncompatibleClassChangeError.class, () -> {
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I o = (I) unsafeCastMH(I.class).invokeExact(new Object()); // unrelated
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test(o);
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});
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assertCompiled();
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shouldThrow(IncompatibleClassChangeError.class, () -> {
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I j = (I) unsafeCastMH(I.class).invokeExact((Object)new J() {}); // super interface
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test(j);
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});
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assertCompiled();
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}
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}
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public static class TwoLevelHierarchyLinear extends ATest<TwoLevelHierarchyLinear.I> {
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public TwoLevelHierarchyLinear() { super(I.class, C.class); }
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interface J { default Object m() { return WRONG; } }
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interface I extends J { Object m(); }
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static class C implements I { public Object m() { return CORRECT; }}
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interface K1 extends I {}
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interface K2 extends I { Object m(); }
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interface K3 extends I { default Object m() { return WRONG; }}
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static class D implements I { public Object m() { return WRONG; }}
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static class DJ1 implements J {}
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static class DJ2 implements J { public Object m() { return WRONG; }}
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@DontInline
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public Object test(I i) {
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return i.m();
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}
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@TestCase
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public void testMega1() {
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// 0. Trigger compilation of a megamorphic call site
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compile(megamorphic()); // C1,C2,C3 <: C.m <: intf I.m ABSTRACT <: intf J.m ABSTRACT
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assertCompiled();
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// Dependency: type = unique_concrete_method, context = I, method = C.m
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checkInvalidReceiver(); // ensure proper type check is preserved
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// 1. No deoptimization/invalidation on not-yet-seen receiver
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repeat(100, () -> call(new C(){})); // Cn <: C.m <: intf I.m ABSTRACT <: intf J.m DEFAULT
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assertCompiled();
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// 2. No dependency invalidation on class loading of unrelated classes: different context
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initialize(K1.class, // intf K1 <: intf I.m ABSTRACT <: intf J.m DEFAULT
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K2.class, // intf K2.m ABSTRACT <: intf I.m ABSTRACT <: intf J.m DEFAULT
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DJ1.class, // DJ1 <: intf J.m DEFAULT
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DJ2.class); // DJ2.m <: intf J.m DEFAULT
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assertCompiled();
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// 3. Dependency invalidation on D <: I
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initialize(D.class); // D.m <: intf I.m ABSTRACT <: intf J.m DEFAULT
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assertNotCompiled();
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// 4. Recompilation: no inlining, no dependencies
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compile(megamorphic());
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call(new C() { public Object m() { return CORRECT; }}); // Cn.m <: C.m <: intf I.m ABSTRACT <: intf J.m DEFAULT
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assertCompiled();
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checkInvalidReceiver(); // ensure proper type check on receiver is preserved
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}
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@TestCase
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public void testMega2() {
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// 0. Trigger compilation of a megamorphic call site
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compile(megamorphic()); // C1,C2,C3 <: C.m <: intf I.m ABSTRACT <: intf J.m DEFAULT
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assertCompiled();
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// Dependency: type = unique_concrete_method, context = I, method = C.m
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checkInvalidReceiver(); // ensure proper type check on receiver is preserved
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// 1. Dependency invalidation
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initialize(K3.class); // intf K3.m DEFAULT <: intf I.m ABSTRACT <: intf J.m DEFAULT
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assertNotCompiled();
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// 2. Recompilation: still inlines
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// FIXME: no default method support in CHA yet
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compile(megamorphic());
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call(new K3() { public Object m() { return CORRECT; }}); // K3n.m <: intf K3.m DEFAULT <: intf I.m ABSTRACT <: intf J.m ABSTRACT
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assertNotCompiled();
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// 3. Recompilation: no inlining, no dependencies
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compile(megamorphic());
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call(new K3() { public Object m() { return CORRECT; }}); // Kn.m <: intf K3.m DEFAULT <: intf I.m ABSTRACT <: intf J.m DEFAULT
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assertCompiled();
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checkInvalidReceiver(); // ensure proper type check on receiver is preserved
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}
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@Override
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public void checkInvalidReceiver() {
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shouldThrow(IncompatibleClassChangeError.class, () -> {
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I o = (I) unsafeCastMH(I.class).invokeExact(new Object()); // unrelated
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test(o);
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});
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assertCompiled();
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shouldThrow(IncompatibleClassChangeError.class, () -> {
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I j = (I) unsafeCastMH(I.class).invokeExact((Object)new J() {}); // super interface
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test(j);
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});
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assertCompiled();
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}
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}
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public static class ThreeLevelHierarchyLinear extends ATest<ThreeLevelHierarchyLinear.I> {
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public ThreeLevelHierarchyLinear() { super(I.class, C.class); }
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interface J { Object m(); }
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interface I extends J {}
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interface K1 extends I {}
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interface K2 extends I { Object m(); }
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interface K3 extends I { default Object m() { return WRONG; }}
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static class C implements I { public Object m() { return CORRECT; }}
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static class DI implements I { public Object m() { return WRONG; }}
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static class DJ implements J { public Object m() { return WRONG; }}
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@DontInline
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public Object test(I i) {
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return i.m(); // I <: J.m ABSTRACT
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}
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@TestCase
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public void testMega1() {
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// 0. Trigger compilation of a megamorphic call site
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compile(megamorphic()); // C1,C2,C3 <: C.m <: intf I <: intf J.m ABSTRACT
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assertCompiled();
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// Dependency: type = unique_concrete_method, context = I, method = C.m
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checkInvalidReceiver(); // ensure proper type check on receiver is preserved
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// 1. No deoptimization/invalidation on not-yet-seen receiver
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repeat(100, () -> call(new C(){})); // Cn <: C.m <: intf I
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assertCompiled(); // No deopt on not-yet-seen receiver
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// 2. No dependency invalidation: different context
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initialize(DJ.class, // DJ.m <: intf J.m ABSTRACT
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K1.class, // intf K1 <: intf I <: intf J.m ABSTRACT
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K2.class); // intf K2.m ABSTRACT <: intf I <: intf J.m ABSTRACT
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assertCompiled();
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// 3. Dependency invalidation: DI.m <: I
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initialize(DI.class); // DI.m <: intf I <: intf J.m ABSTRACT
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assertNotCompiled();
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// 4. Recompilation w/o a dependency
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compile(megamorphic());
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call(new C() { public Object m() { return CORRECT; }}); // Cn.m <: C.m <: intf I <: intf J.m ABSTRACT
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assertCompiled(); // no dependency
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checkInvalidReceiver(); // ensure proper type check on receiver is preserved
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}
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@TestCase
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public void testMega2() {
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compile(megamorphic()); // C1,C2,C3 <: C.m <: intf I <: intf J.m ABSTRACT
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assertCompiled();
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// Dependency: type = unique_concrete_method, context = I, method = C.m
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checkInvalidReceiver(); // ensure proper type check on receiver is preserved
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// Dependency invalidation
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initialize(K3.class); // intf K3.m DEFAULT <: intf I;
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assertNotCompiled(); // FIXME: default methods in sub-interfaces shouldn't be taken into account by CHA
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// Recompilation with a dependency
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compile(megamorphic());
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assertCompiled();
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// Dependency: type = unique_concrete_method, context = I, method = C.m
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checkInvalidReceiver(); // ensure proper type check on receiver is preserved
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call(new K3() { public Object m() { return CORRECT; }}); // Kn.m <: K3.m DEFAULT <: intf I <: intf J.m ABSTRACT
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assertNotCompiled();
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// Recompilation w/o a dependency
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compile(megamorphic());
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// Dependency: none
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checkInvalidReceiver(); // ensure proper type check on receiver is preserved
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call(new C() { public Object m() { return CORRECT; }}); // Cn.m <: C.m <: intf I <: intf J.m ABSTRACT
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assertCompiled();
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}
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@Override
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public void checkInvalidReceiver() {
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shouldThrow(IncompatibleClassChangeError.class, () -> {
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I o = (I) unsafeCastMH(I.class).invokeExact(new Object()); // unrelated
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test(o);
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});
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assertCompiled();
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shouldThrow(IncompatibleClassChangeError.class, () -> {
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I j = (I) unsafeCastMH(I.class).invokeExact((Object)new J() { public Object m() { return WRONG; }}); // super interface
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test(j);
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});
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assertCompiled();
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}
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}
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public static class ThreeLevelHierarchyAbstractVsDefault extends ATest<ThreeLevelHierarchyAbstractVsDefault.I> {
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public ThreeLevelHierarchyAbstractVsDefault() { super(I.class, C.class); }
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interface J1 { default Object m() { return WRONG; } } // intf J1.m DEFAULT
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interface J2 extends J1 { Object m(); } // intf J2.m ABSTRACT <: intf J1
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interface I extends J1, J2 {} // intf I.m OVERPASS <: intf J1,J2
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static class C implements I { public Object m() { return CORRECT; }}
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@DontInline
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public Object test(I i) {
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return i.m(); // intf I.m OVERPASS
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}
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static class DI implements I { public Object m() { return WRONG; }}
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|
|
static class DJ11 implements J1 {}
|
|
static class DJ12 implements J1 { public Object m() { return WRONG; }}
|
|
|
|
static class DJ2 implements J2 { public Object m() { return WRONG; }}
|
|
|
|
interface K11 extends J1 {}
|
|
interface K12 extends J1 { Object m(); }
|
|
interface K13 extends J1 { default Object m() { return WRONG; }}
|
|
interface K21 extends J2 {}
|
|
interface K22 extends J2 { Object m(); }
|
|
interface K23 extends J2 { default Object m() { return WRONG; }}
|
|
|
|
|
|
public void testMega1() {
|
|
// 0. Trigger compilation of megamorphic call site
|
|
compile(megamorphic()); // C1,C2,C3 <: C.m <: intf I.m OVERPASS <: intf J2.m ABSTRACT <: intf J1.m DEFAULT
|
|
assertCompiled();
|
|
|
|
// Dependency: type = unique_concrete_method, context = I, method = C.m
|
|
|
|
checkInvalidReceiver(); // ensure proper type check on receiver is preserved
|
|
|
|
// 1. No deopt/invalidation on not-yet-seen receiver
|
|
repeat(100, () -> call(new C(){})); // Cn <: C.m <: intf I.m OVERPASS <: intf J2.m ABSTRACT <: intf J1.m DEFAULT
|
|
assertCompiled();
|
|
|
|
// 2. No dependency invalidation: different context
|
|
initialize(K11.class, K12.class, K13.class,
|
|
K21.class, K22.class, K23.class);
|
|
|
|
// 3. Dependency invalidation: Cn.m <: C <: I
|
|
call(new C() { public Object m() { return CORRECT; }}); // Cn.m <: C.m <: intf I.m OVERPASS <: intf J2.m ABSTRACT <: intf J1.m DEFAULT
|
|
assertNotCompiled();
|
|
|
|
// 4. Recompilation w/o a dependency
|
|
compile(megamorphic());
|
|
call(new C() { public Object m() { return CORRECT; }});
|
|
assertCompiled(); // no inlining
|
|
|
|
checkInvalidReceiver(); // ensure proper type check on receiver is preserved
|
|
}
|
|
|
|
public void testMega2() {
|
|
// 0. Trigger compilation of a megamorphic call site
|
|
compile(megamorphic());
|
|
assertCompiled();
|
|
|
|
// Dependency: type = unique_concrete_method, context = I, method = C.m
|
|
|
|
checkInvalidReceiver(); // ensure proper type check on receiver is preserved
|
|
|
|
// 1. No dependency invalidation: different context
|
|
initialize(DJ11.class,
|
|
DJ12.class,
|
|
DJ2.class);
|
|
assertCompiled();
|
|
|
|
// 2. Dependency invalidation: DI.m <: I
|
|
initialize(DI.class);
|
|
assertNotCompiled();
|
|
|
|
// 3. Recompilation w/o a dependency
|
|
compile(megamorphic());
|
|
call(new C() { public Object m() { return CORRECT; }});
|
|
assertCompiled(); // no inlining
|
|
|
|
checkInvalidReceiver(); // ensure proper type check on receiver is preserved
|
|
}
|
|
|
|
@Override
|
|
public void checkInvalidReceiver() {
|
|
shouldThrow(IncompatibleClassChangeError.class, () -> {
|
|
I o = (I) unsafeCastMH(I.class).invokeExact(new Object()); // unrelated
|
|
test(o);
|
|
});
|
|
assertCompiled();
|
|
|
|
shouldThrow(IncompatibleClassChangeError.class, () -> {
|
|
I j = (I) unsafeCastMH(I.class).invokeExact((Object)new J1() {}); // super interface
|
|
test(j);
|
|
});
|
|
assertCompiled();
|
|
|
|
shouldThrow(IncompatibleClassChangeError.class, () -> {
|
|
I j = (I) unsafeCastMH(I.class).invokeExact((Object)new J2() { public Object m() { return WRONG; }}); // super interface
|
|
test(j);
|
|
});
|
|
assertCompiled();
|
|
}
|
|
}
|
|
|
|
public static class ThreeLevelDefaultHierarchy extends ATest<ThreeLevelDefaultHierarchy.I> {
|
|
public ThreeLevelDefaultHierarchy() { super(I.class, C.class); }
|
|
|
|
interface J { default Object m() { return WRONG; }}
|
|
interface I extends J {}
|
|
|
|
static class C implements I { public Object m() { return CORRECT; }}
|
|
|
|
interface K1 extends I {}
|
|
interface K2 extends I { Object m(); }
|
|
interface K3 extends I { default Object m() { return WRONG; }}
|
|
|
|
static class DI implements I { public Object m() { return WRONG; }}
|
|
static class DJ implements J { public Object m() { return WRONG; }}
|
|
|
|
@DontInline
|
|
public Object test(I i) {
|
|
return i.m(); // no inlining since J.m is a default method
|
|
}
|
|
|
|
@TestCase
|
|
public void testMega() {
|
|
// 0. Trigger compilation of a megamorphic call site
|
|
compile(megamorphic()); // C1,C2,C3 <: C.m <: intf I <: intf J.m ABSTRACT
|
|
assertCompiled();
|
|
|
|
// Dependency: none
|
|
|
|
checkInvalidReceiver(); // ensure proper type check on receiver is preserved
|
|
|
|
// 1. No deoptimization/invalidation on not-yet-seen receiver
|
|
repeat(100, () -> call(new C() {}));
|
|
assertCompiled();
|
|
|
|
// 2. No dependency and no inlining
|
|
initialize(DJ.class, // DJ.m <: intf J.m ABSTRACT
|
|
DI.class, // DI.m <: intf I <: intf J.m ABSTRACT
|
|
K1.class, // intf K1 <: intf I <: intf J.m ABSTRACT
|
|
K2.class); // intf K2.m ABSTRACT <: intf I <: intf J.m ABSTRACT
|
|
assertCompiled();
|
|
}
|
|
|
|
@Override
|
|
public void checkInvalidReceiver() {
|
|
shouldThrow(IncompatibleClassChangeError.class, () -> {
|
|
I o = (I) unsafeCastMH(I.class).invokeExact(new Object()); // unrelated
|
|
test(o);
|
|
});
|
|
assertCompiled();
|
|
|
|
shouldThrow(IncompatibleClassChangeError.class, () -> {
|
|
I j = (I) unsafeCastMH(I.class).invokeExact((Object)new J() {}); // super interface
|
|
test(j);
|
|
});
|
|
assertCompiled();
|
|
}
|
|
}
|
|
|
|
public static class ThreeLevelDefaultHierarchy1 extends ATest<ThreeLevelDefaultHierarchy1.I> {
|
|
public ThreeLevelDefaultHierarchy1() { super(I.class, C.class); }
|
|
|
|
interface J1 { Object m();}
|
|
interface J2 extends J1 { default Object m() { return WRONG; } }
|
|
interface I extends J1, J2 {}
|
|
|
|
static class C implements I { public Object m() { return CORRECT; }}
|
|
|
|
interface K1 extends I {}
|
|
interface K2 extends I { Object m(); }
|
|
interface K3 extends I { default Object m() { return WRONG; }}
|
|
|
|
static class DI implements I { public Object m() { return WRONG; }}
|
|
static class DJ1 implements J1 { public Object m() { return WRONG; }}
|
|
static class DJ2 implements J2 { public Object m() { return WRONG; }}
|
|
|
|
@DontInline
|
|
public Object test(I i) {
|
|
return i.m(); // no inlining since J.m is a default method
|
|
}
|
|
|
|
@TestCase
|
|
public void testMega() {
|
|
// 0. Trigger compilation of a megamorphic call site
|
|
compile(megamorphic());
|
|
assertCompiled();
|
|
|
|
// Dependency: none
|
|
|
|
checkInvalidReceiver(); // ensure proper type check on receiver is preserved
|
|
|
|
// 1. No deoptimization/invalidation on not-yet-seen receiver
|
|
repeat(100, () -> call(new C() {}));
|
|
assertCompiled();
|
|
|
|
// 2. No dependency, no inlining
|
|
// CHA doesn't support default methods yet.
|
|
initialize(DJ1.class,
|
|
DJ2.class,
|
|
DI.class,
|
|
K1.class,
|
|
K2.class,
|
|
K3.class);
|
|
assertCompiled();
|
|
}
|
|
|
|
@Override
|
|
public void checkInvalidReceiver() {
|
|
shouldThrow(IncompatibleClassChangeError.class, () -> {
|
|
I o = (I) unsafeCastMH(I.class).invokeExact(new Object()); // unrelated
|
|
test(o);
|
|
});
|
|
assertCompiled();
|
|
|
|
shouldThrow(IncompatibleClassChangeError.class, () -> {
|
|
I j = (I) unsafeCastMH(I.class).invokeExact((Object)new J1() { public Object m() { return WRONG; } }); // super interface
|
|
test(j);
|
|
});
|
|
assertCompiled();
|
|
|
|
shouldThrow(IncompatibleClassChangeError.class, () -> {
|
|
I j = (I) unsafeCastMH(I.class).invokeExact((Object)new J2() {}); // super interface
|
|
test(j);
|
|
});
|
|
assertCompiled();
|
|
}
|
|
}
|
|
|
|
/* =========================================================== */
|
|
|
|
interface Action {
|
|
int run();
|
|
}
|
|
|
|
public static final Unsafe U = Unsafe.getUnsafe();
|
|
|
|
interface Test<T> {
|
|
void call(T o);
|
|
T receiver(int id);
|
|
|
|
default Runnable monomophic() {
|
|
return () -> {
|
|
call(receiver(0)); // 100%
|
|
};
|
|
}
|
|
|
|
default Runnable bimorphic() {
|
|
return () -> {
|
|
call(receiver(0)); // 50%
|
|
call(receiver(1)); // 50%
|
|
};
|
|
}
|
|
|
|
default Runnable polymorphic() {
|
|
return () -> {
|
|
for (int i = 0; i < 23; i++) {
|
|
call(receiver(0)); // 92%
|
|
}
|
|
call(receiver(1)); // 4%
|
|
call(receiver(2)); // 4%
|
|
};
|
|
}
|
|
|
|
default Runnable megamorphic() {
|
|
return () -> {
|
|
call(receiver(0)); // 33%
|
|
call(receiver(1)); // 33%
|
|
call(receiver(2)); // 33%
|
|
};
|
|
}
|
|
|
|
default void initialize(Class<?>... cs) {
|
|
for (Class<?> c : cs) {
|
|
U.ensureClassInitialized(c);
|
|
}
|
|
}
|
|
|
|
default void repeat(int cnt, Runnable r) {
|
|
for (int i = 0; i < cnt; i++) {
|
|
r.run();
|
|
}
|
|
}
|
|
}
|
|
|
|
public static abstract class ATest<T> implements Test<T> {
|
|
public static final WhiteBox WB = WhiteBox.getWhiteBox();
|
|
|
|
public static final Object CORRECT = new Object();
|
|
public static final Object WRONG = new Object();
|
|
|
|
final Method TEST;
|
|
private final Class<T> declared;
|
|
private final Class<?> receiver;
|
|
|
|
private final HashMap<Integer, T> receivers = new HashMap<>();
|
|
|
|
public ATest(Class<T> declared, Class<?> receiver) {
|
|
this.declared = declared;
|
|
this.receiver = receiver;
|
|
TEST = compute(() -> this.getClass().getDeclaredMethod("test", declared));
|
|
}
|
|
|
|
@DontInline
|
|
public abstract Object test(T i);
|
|
|
|
public abstract void checkInvalidReceiver();
|
|
|
|
public T receiver(int id) {
|
|
return receivers.computeIfAbsent(id, (i -> {
|
|
try {
|
|
MyClassLoader cl = (MyClassLoader) receiver.getClassLoader();
|
|
Class<?> sub = cl.subclass(receiver, i);
|
|
return (T)sub.getDeclaredConstructor().newInstance();
|
|
} catch (Exception e) {
|
|
throw new Error(e);
|
|
}
|
|
}));
|
|
}
|
|
|
|
|
|
public void compile(Runnable r) {
|
|
while (!WB.isMethodCompiled(TEST)) {
|
|
for (int i = 0; i < 100; i++) {
|
|
r.run();
|
|
}
|
|
}
|
|
assertCompiled(); // record nmethod info
|
|
}
|
|
|
|
private NMethod prevNM = null;
|
|
|
|
public void assertNotCompiled() {
|
|
NMethod curNM = NMethod.get(TEST, false);
|
|
assertTrue(prevNM != null); // was previously compiled
|
|
assertTrue(curNM == null || prevNM.compile_id != curNM.compile_id); // either no nmethod present or recompiled
|
|
prevNM = curNM; // update nmethod info
|
|
}
|
|
|
|
public void assertCompiled() {
|
|
NMethod curNM = NMethod.get(TEST, false);
|
|
assertTrue(curNM != null); // nmethod is present
|
|
assertTrue(prevNM == null || prevNM.compile_id == curNM.compile_id); // no recompilations if nmethod present
|
|
prevNM = curNM; // update nmethod info
|
|
}
|
|
|
|
@Override
|
|
public void call(T i) {
|
|
assertTrue(test(i) != WRONG);
|
|
}
|
|
}
|
|
|
|
@Retention(value = RetentionPolicy.RUNTIME)
|
|
public @interface TestCase {}
|
|
|
|
static void run(Class<?> test) {
|
|
try {
|
|
for (Method m : test.getDeclaredMethods()) {
|
|
if (m.isAnnotationPresent(TestCase.class)) {
|
|
System.out.println(m.toString());
|
|
ClassLoader cl = new MyClassLoader(test);
|
|
Class<?> c = cl.loadClass(test.getName());
|
|
c.getMethod(m.getName()).invoke(c.getDeclaredConstructor().newInstance());
|
|
}
|
|
}
|
|
} catch (Exception e) {
|
|
throw new Error(e);
|
|
}
|
|
}
|
|
|
|
static class ObjectToStringHelper {
|
|
static Object test(Object o) {
|
|
throw new Error("not used");
|
|
}
|
|
}
|
|
static class ObjectHashCodeHelper {
|
|
static int test(Object o) {
|
|
throw new Error("not used");
|
|
}
|
|
}
|
|
|
|
static final class MyClassLoader extends ClassLoader {
|
|
private final Class<?> test;
|
|
|
|
MyClassLoader(Class<?> test) {
|
|
this.test = test;
|
|
}
|
|
|
|
static String intl(String s) {
|
|
return s.replace('.', '/');
|
|
}
|
|
|
|
Class<?> subclass(Class<?> c, int id) {
|
|
String name = c.getName() + id;
|
|
Class<?> sub = findLoadedClass(name);
|
|
if (sub == null) {
|
|
ClassWriter cw = new ClassWriter(COMPUTE_MAXS | COMPUTE_FRAMES);
|
|
cw.visit(52, ACC_PUBLIC | ACC_SUPER, intl(name), null, intl(c.getName()), null);
|
|
|
|
{ // Default constructor: <init>()V
|
|
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
|
|
mv.visitCode();
|
|
mv.visitVarInsn(ALOAD, 0);
|
|
mv.visitMethodInsn(INVOKESPECIAL, intl(c.getName()), "<init>", "()V", false);
|
|
mv.visitInsn(RETURN);
|
|
mv.visitMaxs(0, 0);
|
|
mv.visitEnd();
|
|
}
|
|
|
|
byte[] classFile = cw.toByteArray();
|
|
return defineClass(name, classFile, 0, classFile.length);
|
|
}
|
|
return sub;
|
|
}
|
|
|
|
protected Class<?> loadClass(String name, boolean resolve)
|
|
throws ClassNotFoundException
|
|
{
|
|
// First, check if the class has already been loaded
|
|
Class<?> c = findLoadedClass(name);
|
|
if (c == null) {
|
|
try {
|
|
c = getParent().loadClass(name);
|
|
if (name.endsWith("ObjectToStringHelper")) {
|
|
ClassWriter cw = new ClassWriter(COMPUTE_MAXS | COMPUTE_FRAMES);
|
|
cw.visit(52, ACC_PUBLIC | ACC_SUPER, intl(name), null, "java/lang/Object", null);
|
|
|
|
{
|
|
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "test", "(Ljava/lang/Object;)Ljava/lang/Object;", null, null);
|
|
mv.visitCode();
|
|
mv.visitVarInsn(ALOAD, 0);
|
|
mv.visitMethodInsn(INVOKEINTERFACE, intl(test.getName()) + "$I", "toString", "()Ljava/lang/String;", true);
|
|
mv.visitInsn(ARETURN);
|
|
mv.visitMaxs(0, 0);
|
|
mv.visitEnd();
|
|
}
|
|
|
|
byte[] classFile = cw.toByteArray();
|
|
return defineClass(name, classFile, 0, classFile.length);
|
|
} else if (name.endsWith("ObjectHashCodeHelper")) {
|
|
ClassWriter cw = new ClassWriter(COMPUTE_MAXS | COMPUTE_FRAMES);
|
|
cw.visit(52, ACC_PUBLIC | ACC_SUPER, intl(name), null, "java/lang/Object", null);
|
|
|
|
{
|
|
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "test", "(Ljava/lang/Object;)I", null, null);
|
|
mv.visitCode();
|
|
mv.visitVarInsn(ALOAD, 0);
|
|
mv.visitMethodInsn(INVOKEINTERFACE, intl(test.getName()) + "$I", "hashCode", "()I", true);
|
|
mv.visitInsn(IRETURN);
|
|
mv.visitMaxs(0, 0);
|
|
mv.visitEnd();
|
|
}
|
|
|
|
byte[] classFile = cw.toByteArray();
|
|
return defineClass(name, classFile, 0, classFile.length);
|
|
} else if (c == test || name.startsWith(test.getName())) {
|
|
try {
|
|
String path = name.replace('.', '/') + ".class";
|
|
byte[] classFile = getParent().getResourceAsStream(path).readAllBytes();
|
|
return defineClass(name, classFile, 0, classFile.length);
|
|
} catch (IOException e) {
|
|
throw new Error(e);
|
|
}
|
|
}
|
|
} catch (ClassNotFoundException e) {
|
|
// ClassNotFoundException thrown if class not found
|
|
// from the non-null parent class loader
|
|
}
|
|
|
|
if (c == null) {
|
|
// If still not found, then invoke findClass in order
|
|
// to find the class.
|
|
c = findClass(name);
|
|
}
|
|
}
|
|
if (resolve) {
|
|
resolveClass(c);
|
|
}
|
|
return c;
|
|
}
|
|
}
|
|
|
|
public interface RunnableWithException {
|
|
void run() throws Throwable;
|
|
}
|
|
|
|
public static void shouldThrow(Class<? extends Throwable> expectedException, RunnableWithException r) {
|
|
try {
|
|
r.run();
|
|
throw new AssertionError("Exception not thrown: " + expectedException.getName());
|
|
} catch(Throwable e) {
|
|
if (expectedException == e.getClass()) {
|
|
// success: proper exception is thrown
|
|
} else {
|
|
throw new Error(expectedException.getName() + " is expected", e);
|
|
}
|
|
}
|
|
}
|
|
|
|
public static MethodHandle unsafeCastMH(Class<?> cls) {
|
|
try {
|
|
MethodHandle mh = MethodHandles.identity(Object.class);
|
|
return MethodHandles.explicitCastArguments(mh, mh.type().changeReturnType(cls));
|
|
} catch (Throwable e) {
|
|
throw new Error(e);
|
|
}
|
|
}
|
|
|
|
static <T> T compute(Callable<T> c) {
|
|
try {
|
|
return c.call();
|
|
} catch (Exception e) {
|
|
throw new Error(e);
|
|
}
|
|
}
|
|
}
|