russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
128 lines
6.3 KiB
Java
128 lines
6.3 KiB
Java
/*
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* Copyright (c) 2022, 2024, 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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* @summary Testing ClassFile class building.
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* @run junit WriteTest
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*/
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import java.lang.constant.ClassDesc;
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import java.lang.constant.MethodTypeDesc;
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import helpers.TestConstants;
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import java.lang.reflect.AccessFlag;
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import java.lang.classfile.ClassFile;
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import java.lang.classfile.Label;
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import java.lang.classfile.attribute.SourceFileAttribute;
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import org.junit.jupiter.api.Test;
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import static helpers.TestConstants.MTD_VOID;
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import static java.lang.classfile.ClassFile.ACC_PUBLIC;
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import static java.lang.classfile.ClassFile.ACC_STATIC;
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import static java.lang.constant.ConstantDescs.*;
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class WriteTest {
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@Test
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void testJavapWrite() {
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byte[] bytes = ClassFile.of().build(ClassDesc.of("MyClass"), cb -> {
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cb.withFlags(AccessFlag.PUBLIC);
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cb.with(SourceFileAttribute.of(cb.constantPool().utf8Entry(("MyClass.java"))))
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.withMethod("<init>", MethodTypeDesc.of(CD_void), 0, mb -> mb
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.withCode(codeb -> codeb.aload(0)
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.invokespecial(CD_Object, "<init>",
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MethodTypeDesc.ofDescriptor("()V"), false)
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.return_()
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)
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)
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.withMethod("main", MethodTypeDesc.of(CD_void, CD_String.arrayType()),
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ACC_PUBLIC | ACC_STATIC,
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mb -> mb.withCode(c0 -> {
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Label loopTop = c0.newLabel();
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Label loopEnd = c0.newLabel();
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c0
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.iconst_1() // 0
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.istore(1) // 1
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.iconst_1() // 2
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.istore(2) // 3
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.labelBinding(loopTop)
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.iload(2) // 4
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.bipush(10) // 5
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.if_icmpge(loopEnd) // 6
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.iload(1) // 7
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.iload(2) // 8
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.imul() // 9
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.istore(1) // 10
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.iinc(2, 1) // 11
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.goto_(loopTop) // 12
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.labelBinding(loopEnd)
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.getstatic(TestConstants.CD_System, "out", TestConstants.CD_PrintStream) // 13
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.iload(1)
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.invokevirtual(TestConstants.CD_PrintStream, "println", TestConstants.MTD_INT_VOID) // 15
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.return_();
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}));
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});
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}
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@Test
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void testPrimitiveWrite() {
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byte[] bytes = ClassFile.of().build(ClassDesc.of("MyClass"), cb -> {
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cb.withFlags(AccessFlag.PUBLIC)
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.with(SourceFileAttribute.of(cb.constantPool().utf8Entry(("MyClass.java"))))
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.withMethod("<init>", MethodTypeDesc.of(CD_void), 0, mb -> mb
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.withCode(codeb -> codeb.aload(0)
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.invokespecial(CD_Object, "<init>", MTD_VOID, false)
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.return_()
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)
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)
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.withMethod("main", MethodTypeDesc.of(CD_void, CD_String.arrayType()),
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ACC_PUBLIC | ACC_STATIC,
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mb -> mb.withCode(c0 -> {
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Label loopTop = c0.newLabel();
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Label loopEnd = c0.newLabel();
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c0
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.iconst_1() // 0
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.istore(1) // 1
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.iconst_1() // 2
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.istore(2) // 3
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.labelBinding(loopTop)
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.iload(2) // 4
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.bipush(10) // 5
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.if_icmpge(loopEnd) // 6
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.iload(1) // 7
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.iload(2) // 8
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.imul() // 9
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.istore(1) // 10
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.iinc(2, 1) // 11
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.goto_(loopTop) // 12
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.labelBinding(loopEnd)
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.getstatic(TestConstants.CD_System, "out", TestConstants.CD_PrintStream) // 13
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.iload(1)
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.invokevirtual(TestConstants.CD_PrintStream, "println", TestConstants.MTD_INT_VOID) // 15
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.return_();
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}));
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});
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}
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}
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