78 lines
2.7 KiB
Java
78 lines
2.7 KiB
Java
/*
|
|
* Copyright (c) 2018, 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
|
|
* @summary
|
|
* @library /tools/lib
|
|
* @enablePreview
|
|
* @modules jdk.compiler/com.sun.tools.javac.api
|
|
* jdk.compiler/com.sun.tools.javac.main
|
|
* jdk.compiler/com.sun.tools.javac.util
|
|
* jdk.jdeps/com.sun.tools.javap
|
|
* @build toolbox.ToolBox toolbox.JavacTask
|
|
* @run main NoLocalsMustBeReservedForDCEedVarsTest
|
|
*/
|
|
|
|
import java.io.File;
|
|
import java.nio.file.Paths;
|
|
|
|
import java.lang.classfile.*;
|
|
import java.lang.classfile.attribute.*;
|
|
import com.sun.tools.javac.util.Assert;
|
|
|
|
import toolbox.JavacTask;
|
|
import toolbox.ToolBox;
|
|
|
|
public class NoLocalsMustBeReservedForDCEedVarsTest {
|
|
|
|
static final String source =
|
|
"class Test {\n" +
|
|
" static String foo() {\n" +
|
|
" final String hello = \"Hello!\";\n" +
|
|
" return hello;\n" +
|
|
" }\n" +
|
|
"} ";
|
|
|
|
public static void main(String[] args) throws Exception {
|
|
new NoLocalsMustBeReservedForDCEedVarsTest().run();
|
|
}
|
|
|
|
void run() throws Exception {
|
|
ToolBox tb = new ToolBox();
|
|
new JavacTask(tb)
|
|
.sources(source)
|
|
.run();
|
|
|
|
File cfile = new File(Paths.get(System.getProperty("user.dir"), "Test.class").toUri());
|
|
ClassModel classFile = ClassFile.of().parse(cfile.toPath());
|
|
for (MethodModel method: classFile.methods()) {
|
|
if (method.methodName().stringValue().equals("foo")) {
|
|
CodeAttribute codeAttr = method.findAttribute(Attributes.code()).orElse(null);
|
|
assert codeAttr != null;
|
|
Assert.check(codeAttr.maxLocals() == 0, "max locals found " + codeAttr.maxLocals());
|
|
}
|
|
}
|
|
}
|
|
}
|