| /* |
| * Copyright (c) 2017, 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 8186046 |
| * @summary Stress test ldc to ensure HotSpot correctly manages oop maps |
| * @library /lib/testlibrary/bytecode /java/lang/invoke/common |
| * @build jdk.experimental.bytecode.BasicClassBuilder test.java.lang.invoke.lib.InstructionHelper |
| * @run testng CondyWithGarbageTest |
| * @run testng/othervm -XX:+UnlockDiagnosticVMOptions -XX:UseBootstrapCallInfo=3 CondyWithGarbageTest |
| */ |
| |
| |
| import jdk.experimental.bytecode.BasicClassBuilder; |
| import jdk.experimental.bytecode.Flag; |
| import jdk.experimental.bytecode.TypedCodeBuilder; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodHandles; |
| |
| import static java.lang.invoke.MethodType.methodType; |
| import static test.java.lang.invoke.lib.InstructionHelper.cref; |
| import static test.java.lang.invoke.lib.InstructionHelper.csym; |
| |
| public class CondyWithGarbageTest { |
| static final MethodHandles.Lookup L = MethodHandles.lookup(); |
| |
| @Test |
| public void testString() throws Throwable { |
| MethodHandle mh = lcdStringBasher(); |
| int l = 0; |
| for (int i = 0; i < 100000; i++) { |
| l += +((String) mh.invoke()).length(); |
| } |
| Assert.assertTrue(l > 0); |
| } |
| |
| public static Object bsmString(MethodHandles.Lookup l, |
| String constantName, |
| Class<?> constantType) { |
| return new StringBuilder(constantName).toString(); |
| } |
| |
| static MethodHandle lcdStringBasher() throws Exception { |
| byte[] byteArray = new BasicClassBuilder(csym(L.lookupClass()) + "$Code$String", 55, 0) |
| .withSuperclass("java/lang/Object") |
| .withMethod("<init>", "()V", M -> |
| M.withFlags(Flag.ACC_PUBLIC) |
| .withCode(TypedCodeBuilder::new, C -> |
| C.aload_0().invokespecial("java/lang/Object", "<init>", "()V", false).return_() |
| )) |
| .withMethod("m", "()" + cref(String.class), M -> |
| M.withFlags(Flag.ACC_PUBLIC, Flag.ACC_STATIC) |
| .withCode(TypedCodeBuilder::new, C -> { |
| C.new_(csym(StringBuilder.class)) |
| .dup() |
| .invokespecial(csym(StringBuilder.class), "<init>", "()V", false) |
| .astore_0(); |
| |
| for (int i = 10; i < 100; i++) { |
| ldcString(C, Integer.toString(i)); |
| C.astore_1().aload_0().aload_1(); |
| C.invokevirtual(csym(StringBuilder.class), "append", methodType(StringBuilder.class, String.class).toMethodDescriptorString(), false); |
| C.pop(); |
| } |
| |
| C.aload_0(); |
| C.invokevirtual(csym(StringBuilder.class), "toString", methodType(String.class).toMethodDescriptorString(), false); |
| C.areturn(); |
| } |
| )) |
| .build(); |
| |
| Class<?> gc = L.defineClass(byteArray); |
| return L.findStatic(gc, "m", methodType(String.class)); |
| } |
| |
| static void ldcString(TypedCodeBuilder<String, String, byte[], ?> C, String name) { |
| C.ldc(name, cref(String.class), |
| csym(L.lookupClass()), |
| "bsmString", |
| methodType(Object.class, MethodHandles.Lookup.class, String.class, Class.class).toMethodDescriptorString(), |
| S -> { |
| }); |
| } |
| |
| |
| @Test |
| public void testStringArray() throws Throwable { |
| MethodHandle mh = lcdStringArrayBasher(); |
| int l = 0; |
| for (int i = 0; i < 100000; i++) { |
| l += +((String) mh.invoke()).length(); |
| } |
| Assert.assertTrue(l > 0); |
| } |
| |
| public static Object bsmStringArray(MethodHandles.Lookup l, |
| String constantName, |
| Class<?> constantType) { |
| return new String[]{new StringBuilder(constantName).toString()}; |
| } |
| |
| static MethodHandle lcdStringArrayBasher() throws Exception { |
| byte[] byteArray = new BasicClassBuilder(csym(L.lookupClass()) + "$Code$StringArray", 55, 0) |
| .withSuperclass("java/lang/Object") |
| .withMethod("<init>", "()V", M -> |
| M.withFlags(Flag.ACC_PUBLIC) |
| .withCode(TypedCodeBuilder::new, C -> |
| C.aload_0().invokespecial("java/lang/Object", "<init>", "()V", false).return_() |
| )) |
| .withMethod("m", "()" + cref(String.class), M -> |
| M.withFlags(Flag.ACC_PUBLIC, Flag.ACC_STATIC) |
| .withCode(TypedCodeBuilder::new, C -> { |
| C.new_(csym(StringBuilder.class)) |
| .dup() |
| .invokespecial(csym(StringBuilder.class), "<init>", "()V", false) |
| .astore_0(); |
| |
| for (int i = 10; i < 100; i++) { |
| ldcStringArray(C, Integer.toString(i)); |
| C.bipush(0).aaload().astore_1(); |
| C.aload_0().aload_1(); |
| C.invokevirtual(csym(StringBuilder.class), "append", methodType(StringBuilder.class, String.class).toMethodDescriptorString(), false); |
| C.pop(); |
| } |
| |
| C.aload_0(); |
| C.invokevirtual(csym(StringBuilder.class), "toString", methodType(String.class).toMethodDescriptorString(), false); |
| C.areturn(); |
| } |
| )) |
| .build(); |
| |
| Class<?> gc = L.defineClass(byteArray); |
| return L.findStatic(gc, "m", methodType(String.class)); |
| } |
| |
| static void ldcStringArray(TypedCodeBuilder<String, String, byte[], ?> C, String name) { |
| C.ldc(name, cref(String[].class), |
| csym(L.lookupClass()), |
| "bsmStringArray", |
| methodType(Object.class, MethodHandles.Lookup.class, String.class, Class.class).toMethodDescriptorString(), |
| S -> { |
| }); |
| } |
| } |