211 lines
10 KiB
Java
211 lines
10 KiB
Java
/*
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* Copyright (c) 2017, 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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* @bug 8186046
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* @summary Stress test ldc to ensure HotSpot correctly manages oop maps
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* @library /java/lang/invoke/common
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* @build test.java.lang.invoke.lib.InstructionHelper
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* @enablePreview
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* @run testng CondyWithGarbageTest
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* @run testng/othervm -XX:+UnlockDiagnosticVMOptions -XX:UseBootstrapCallInfo=3 CondyWithGarbageTest
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*/
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import java.lang.classfile.ClassFile;
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import java.lang.classfile.CodeBuilder;
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import org.testng.Assert;
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import org.testng.annotations.Test;
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import java.lang.constant.*;
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import java.lang.invoke.MethodHandle;
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import java.lang.invoke.MethodHandles;
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import static java.lang.invoke.MethodType.methodType;
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import static test.java.lang.invoke.lib.InstructionHelper.classDesc;
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public class CondyWithGarbageTest {
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static final MethodHandles.Lookup L = MethodHandles.lookup();
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@Test
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public void testString() throws Throwable {
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MethodHandle mh = lcdStringBasher();
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int l = 0;
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for (int i = 0; i < 100000; i++) {
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l += +((String) mh.invoke()).length();
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}
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Assert.assertTrue(l > 0);
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}
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public static Object bsmString(MethodHandles.Lookup l,
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String constantName,
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Class<?> constantType) {
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return new StringBuilder(constantName).toString();
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}
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static MethodHandle lcdStringBasher() throws Exception {
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ClassDesc cd = classDesc(L.lookupClass(), "$Code$String");
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byte[] bytes = ClassFile.of().build(cd, classBuilder -> classBuilder
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.withVersion(55, 0)
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.withSuperclass(ConstantDescs.CD_Object)
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.withMethod(ConstantDescs.INIT_NAME, ConstantDescs.MTD_void, ClassFile.ACC_PUBLIC,
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methodBuilder -> methodBuilder
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.withCode(codeBuilder -> codeBuilder
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.aload(0)
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.invokespecial(ConstantDescs.CD_Object, ConstantDescs.INIT_NAME,
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ConstantDescs.MTD_void, false)
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.return_()))
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.withMethod("m", MethodTypeDesc.of(ConstantDescs.CD_String),
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ClassFile.ACC_PUBLIC + ClassFile.ACC_STATIC, methodBuilder -> methodBuilder
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.withCode(codeBuilder -> {
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codeBuilder
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.new_(classDesc(StringBuilder.class))
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.dup()
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.invokespecial(classDesc(StringBuilder.class), ConstantDescs.INIT_NAME,
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ConstantDescs.MTD_void, false)
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.astore(0);
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for (int i = 10; i < 100; i++) {
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ldcString(codeBuilder, Integer.toString(i));
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codeBuilder
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.astore(1)
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.aload(0)
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.aload(1)
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.invokevirtual(
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classDesc(StringBuilder.class),
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"append",
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MethodTypeDesc.of(
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classDesc(StringBuilder.class),
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classDesc(String.class)))
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.pop();
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}
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codeBuilder
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.aload(0)
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.invokevirtual(
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classDesc(StringBuilder.class),
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"toString",
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MethodTypeDesc.of(classDesc(String.class)))
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.areturn();
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}
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)));
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Class<?> gc = L.defineClass(bytes);
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return L.findStatic(gc, "m", methodType(String.class));
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}
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private static void ldcString(CodeBuilder codeBuilder, String name) {
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codeBuilder.ldc(DynamicConstantDesc.ofNamed(
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MethodHandleDesc.of(
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DirectMethodHandleDesc.Kind.STATIC,
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classDesc(L.lookupClass()),
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"bsmString",
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methodType(Object.class, MethodHandles.Lookup.class, String.class, Class.class).toMethodDescriptorString()),
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name,
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classDesc(String.class)
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));
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}
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@Test
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public void testStringArray() throws Throwable {
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MethodHandle mh = lcdStringArrayBasher();
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int l = 0;
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for (int i = 0; i < 100000; i++) {
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l += +((String) mh.invoke()).length();
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}
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Assert.assertTrue(l > 0);
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}
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public static Object bsmStringArray(MethodHandles.Lookup l,
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String constantName,
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Class<?> constantType) {
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return new String[]{new StringBuilder(constantName).toString()};
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}
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static MethodHandle lcdStringArrayBasher() throws Exception {
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ClassDesc cd = classDesc(L.lookupClass(), "$Code$StringArray");
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byte[] bytes = ClassFile.of().build(cd, classBuilder -> classBuilder
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.withVersion(55, 0)
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.withSuperclass(ConstantDescs.CD_Object)
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.withMethod(ConstantDescs.INIT_NAME, ConstantDescs.MTD_void, ClassFile.ACC_PUBLIC,
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methodBuilder -> methodBuilder
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.withCode(codeBuilder -> codeBuilder
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.aload(0)
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.invokespecial(ConstantDescs.CD_Object, ConstantDescs.INIT_NAME,
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ConstantDescs.MTD_void, false)
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.return_()))
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.withMethod("m", MethodTypeDesc.of(classDesc(String.class)),
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ClassFile.ACC_PUBLIC + ClassFile.ACC_STATIC, methodBuilder -> methodBuilder
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.withCode(codeBuilder -> {
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codeBuilder
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.new_(classDesc(StringBuilder.class))
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.dup()
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.invokespecial(classDesc(StringBuilder.class),
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ConstantDescs.INIT_NAME, ConstantDescs.MTD_void, false)
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.astore(0);
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for (int i = 10; i < 100; i++) {
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ldcStringArray(codeBuilder, Integer.toString(i));
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codeBuilder
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.bipush(0)
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.aaload()
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.astore(1)
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.aload(0)
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.aload(1)
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.invokevirtual(
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classDesc(StringBuilder.class),
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"append",
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MethodTypeDesc.of(
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classDesc(StringBuilder.class),
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classDesc(String.class)))
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.pop();
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}
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codeBuilder
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.aload(0)
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.invokevirtual(
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classDesc(StringBuilder.class),
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"toString",
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MethodTypeDesc.of(classDesc(String.class)))
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.areturn();
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}
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)));
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Class<?> gc = L.defineClass(bytes);
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return L.findStatic(gc, "m", methodType(String.class));
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}
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static void ldcStringArray(CodeBuilder codeBuilder, String name) {
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codeBuilder.ldc(DynamicConstantDesc.ofNamed(
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MethodHandleDesc.of(
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DirectMethodHandleDesc.Kind.STATIC,
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classDesc(L.lookupClass()),
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"bsmStringArray",
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methodType(Object.class, MethodHandles.Lookup.class, String.class, Class.class).toMethodDescriptorString()
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),
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name,
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classDesc(String[].class)
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));
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}
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}
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