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/*
* 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 -> {
});
}
}
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