89 lines
4.1 KiB
Java
89 lines
4.1 KiB
Java
/*
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* Copyright (c) 2021, 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 Tests WB::isMethodCompilable(m) in combination with compiler directives that prevent a compilation of m.
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* @bug 8263582
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* @library /test/lib /
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
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* -XX:CompileCommand=compileonly,compiler.whitebox.TestMethodCompilableCompilerDirectives::doesNotExist
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* compiler.whitebox.TestMethodCompilableCompilerDirectives
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
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* -XX:CompileCommand=exclude,compiler.whitebox.TestMethodCompilableCompilerDirectives::*
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* compiler.whitebox.TestMethodCompilableCompilerDirectives
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*/
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package compiler.whitebox;
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import jdk.test.lib.Asserts;
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import jdk.test.whitebox.WhiteBox;
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import java.lang.reflect.Method;
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public class TestMethodCompilableCompilerDirectives {
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private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
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// Method too simple for C2 and only C1 compiled.
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public static int c1Compiled() {
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return 3;
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}
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// Method first C1 and then C2 compiled.
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public static int c2Compiled() {
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for (int i = 0; i < 100; i++);
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return 3;
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}
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// WB::isMethodCompilable(m) uses Method::is_not_compilable() to decide if m is compilable. Method::is_not_compilable(), however,
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// returns false regardless of any compiler directives if m was not yet tried to be compiled. The compiler directive ExcludeOption
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// to prevent a compilation is evaluated lazily and is only applied when a compilation for m is attempted.
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// Another problem is that Method::is_not_compilable() only returns true for CompLevel_any if C1 AND C2 cannot compile it.
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// This means that a compilation of m must have been attempted for C1 and C2 before WB::isMethodCompilable(m, CompLevel_any) will
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// ever return false. This disregards any compiler directives (e.g. compileonly, exclude) that prohibit a compilation of m completely.
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// WB::isMethodCompilable() should be aware of the ExcludeOption compiler directives at any point in time.
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public static void main(String[] args) throws NoSuchMethodException {
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Method c1CompiledMethod = TestMethodCompilableCompilerDirectives.class.getDeclaredMethod("c1Compiled");
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Method c2CompiledMethod = TestMethodCompilableCompilerDirectives.class.getDeclaredMethod("c2Compiled");
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boolean compilable = WhiteBox.getWhiteBox().isMethodCompilable(c1CompiledMethod);
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Asserts.assertFalse(compilable);
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for (int i = 0; i < 3000; i++) {
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c1Compiled();
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}
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compilable = WhiteBox.getWhiteBox().isMethodCompilable(c1CompiledMethod);
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Asserts.assertFalse(compilable);
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compilable = WhiteBox.getWhiteBox().isMethodCompilable(c2CompiledMethod);
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Asserts.assertFalse(compilable);
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for (int i = 0; i < 3000; i++) {
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c2Compiled();
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}
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compilable = WhiteBox.getWhiteBox().isMethodCompilable(c2CompiledMethod);
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Asserts.assertFalse(compilable);
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}
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}
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