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/*
* Copyright (c) 2021, 2025, 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
* @requires !vm.graal.enabled
* @modules java.base/jdk.internal.misc
* java.base/jdk.internal.vm.annotation
* @library /testlibrary/asm
* @library /test/lib /
* @compile Utils.java
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
*
* @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockDiagnosticVMOptions
* -XX:+PrintCompilation -XX:+PrintInlining -Xlog:dependencies=debug -verbose:class -XX:CompileCommand=quiet
* -XX:CompileCommand=compileonly,*::m
* -XX:CompileCommand=compileonly,*::test -XX:CompileCommand=dontinline,*::test
* -Xbatch -Xmixed -XX:+WhiteBoxAPI
* -XX:-TieredCompilation
* -XX:-StressMethodHandleLinkerInlining
* compiler.cha.DefaultRootMethod
*
* @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockDiagnosticVMOptions
* -XX:+PrintCompilation -XX:+PrintInlining -Xlog:dependencies=debug -verbose:class -XX:CompileCommand=quiet
* -XX:CompileCommand=compileonly,*::m
* -XX:CompileCommand=compileonly,*::test -XX:CompileCommand=dontinline,*::test
* -Xbatch -Xmixed -XX:+WhiteBoxAPI
* -XX:+TieredCompilation -XX:TieredStopAtLevel=1
* -XX:-StressMethodHandleLinkerInlining
* compiler.cha.DefaultRootMethod
*/
package compiler.cha;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import static compiler.cha.Utils.*;
public class DefaultRootMethod {
public static void main(String[] args) {
run(DefaultRoot.class);
run(InheritedDefault.class);
// Implementation limitation: CHA is not performed by C1 during inlining through MH linkers.
if (!jdk.test.whitebox.code.Compiler.isC1Enabled()) {
run(DefaultRoot.TestMH.class, DefaultRoot.class);
run(InheritedDefault.TestMH.class, InheritedDefault.class);
}
System.out.println("TEST PASSED");
}
public static class DefaultRoot extends ATest<DefaultRoot.C> {
public DefaultRoot() {
super(C.class, D.class);
}
interface I { default Object m() { return CORRECT; } }
static class C implements I { /* inherited I.m */}
static class D extends C { /* inherited I.m */ }
static abstract class E1 extends C { /* empty */ }
static abstract class E2 extends C { public abstract Object m(); }
static abstract class E3 extends C { public Object m() { return "E3.m"; } }
interface I1 extends I { Object m(); }
interface I2 extends I { default Object m() { return "I2.m"; } }
static abstract class F1 extends C implements I1 { }
static abstract class F2 extends C implements I2 { }
static class G extends C { public Object m() { return CORRECT; } }
@Override
public Object test(C obj) throws Throwable {
return obj.m(); // invokevirtual C.m()
}
@Override
public void checkInvalidReceiver() {
// nothing to do: concrete class types are enforced by the verifier
}
@TestCase
public void test() {
// 0. Trigger compilation of a megamorphic call site
compile(megamorphic()); // Dn <: D.m <: C <: I.m DEFAULT
assertCompiled();
// Dependency: type = unique_concrete_method, context = C, method = D.m
// 1. No invalidation: abstract classes don't participate in CHA.
initialize(E1.class, // ABSTRACT E1 <: C <: I.m DEFAULT
E2.class, // ABSTRACT E2.m ABSTRACT <: C <: I.m DEFAULT
E3.class, // ABSTRACT E3.m <: C <: I.m DEFAULT
F1.class, // ABSTRACT F1 <: C <: I.m DEFAULT, I1.m ABSTRACT
F2.class); // ABSTRACT F2 <: C <: I.m DEFAULT, I2.m DEFAULT
assertCompiled();
// 2. Dependency invalidation: G.m <: C <: I.m DEFAULT
load(G.class);
assertCompiled();
// 3. Dependency invalidation: G.m <: C <: I.m DEFAULT
initialize(G.class);
assertNotCompiled();
// 4. Recompilation: no inlining, no dependencies
compile(megamorphic());
call(new C() { public Object m() { return CORRECT; } }); // Cn.m <: C <: I.m DEFAULT
call(new G() { public Object m() { return CORRECT; } }); // Gn <: G.m <: C <: I.m DEFAULT
assertCompiled();
}
public static class TestMH extends DefaultRoot {
static final MethodHandle TEST_MH = findVirtualHelper(C.class, "m", Object.class, MethodHandles.lookup());
@Override
public Object test(C obj) throws Throwable {
return TEST_MH.invokeExact(obj); // invokevirtual C.m()
}
}
}
public static class InheritedDefault extends ATest<InheritedDefault.C> {
public InheritedDefault() {
super(C.class, D.class);
}
interface I { Object m(); }
interface J extends I { default Object m() { return CORRECT; } }
static abstract class C implements I { /* inherits I.m ABSTRACT */}
// NB! The class is marked abstract to avoid abstract_with_unique_concrete_subtype dependency
static abstract class D extends C implements J { /* inherits J.m DEFAULT*/ }
static abstract class E1 extends C { /* empty */ }
static abstract class E2 extends C { public abstract Object m(); }
static abstract class E3 extends C { public Object m() { return "E3.m"; } }
interface I1 extends I { Object m(); }
interface I2 extends I { default Object m() { return "I2.m"; } }
static abstract class F1 extends C implements I1 { }
static abstract class F2 extends C implements I2 { }
interface K extends I { default Object m() { return CORRECT; } }
static class G extends C implements K { /* inherits K.m DEFAULT */ }
@Override
public Object test(C obj) throws Throwable {
return obj.m(); // invokevirtual C.m()
}
@Override
public void checkInvalidReceiver() {
// nothing to do: concrete class types are enforced by the verifier
}
@TestCase
public void test() {
// 0. Trigger compilation of a megamorphic call site
compile(megamorphic()); // Dn <: D.m <: C <: I.m ABSTRACT, J.m DEFAULT
assertCompiled();
// Dependency: type = unique_concrete_method, context = C, method = D.m
// 1. No invalidation: abstract classes don't participate in CHA.
initialize(E1.class, // ABSTRACT E1 <: C <: I.m ABSTRACT
E2.class, // ABSTRACT E2.m ABSTRACT <: C <: I.m ABSTRACT
E3.class, // ABSTRACT E3.m <: C <: I.m ABSTRACT
F1.class, // ABSTRACT F1 <: C <: I.m ABSTRACT, I1.m ABSTRACT
F2.class); // ABSTRACT F2 <: C <: I.m ABSTRACT, I2.m DEFAULT
assertCompiled();
// 2. No invalidation: not yet linked classes don't participate in CHA.
load(G.class);
assertCompiled();
// 3. Dependency invalidation: G.m <: C <: I.m DEFAULT
initialize(G.class);
assertNotCompiled();
// 4. Recompilation: no inlining, no dependencies
compile(megamorphic());
call(new C() { public Object m() { return CORRECT; } }); // Cn.m <: C <: I.m DEFAULT
call(new G() { public Object m() { return CORRECT; } }); // Gn <: G.m <: C <: I.m DEFAULT
assertCompiled();
}
public static class TestMH extends InheritedDefault {
static final MethodHandle TEST_MH = findVirtualHelper(C.class, "m", Object.class, MethodHandles.lookup());
@Override
public Object test(C obj) throws Throwable {
return TEST_MH.invokeExact(obj); // invokevirtual C.m()
}
}
}
}
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