120 lines
4.5 KiB
Java
120 lines
4.5 KiB
Java
/*
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* Copyright (c) 2023, 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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* @bug 8302514
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* @summary Verify truncated class files are detected and reported as truncated
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*/
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import com.sun.tools.javac.Main;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.PrintStream;
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import java.io.PrintWriter;
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import java.io.StringWriter;
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import java.nio.file.Files;
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public class TruncatedClassFileTest {
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// We want a bunch of stuff in this file to make the classfile complicated
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private static final String A_SOURCE = """
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public class ClassA {
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public static final boolean z = true;
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public static final byte b = 7;
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public static final char c = '*';
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public static final short s = -12;
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public static final int i = 123;
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public static final float f = 123f;
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public static final long j = 0x1234567812345678L;
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public static final double d = Math.PI;
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public static final String str = new String("test123");
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@SuppressWarnings("blah")
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public ClassA() {
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new Thread();
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}
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}
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""";
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// This file will get compiled against a trunctated version of A.class
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private static final String B_SOURCE = """
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public class ClassB {
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public ClassB() {
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new ClassA();
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}
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}
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""";
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private static final File A_SOURCE_FILE = new File("ClassA.java");
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private static final File B_SOURCE_FILE = new File("ClassB.java");
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private static final File A_CLASS_FILE = new File("ClassA.class");
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private static void createSourceFile(File file, String content) throws IOException {
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try (PrintStream output = new PrintStream(new FileOutputStream(file))) {
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output.println(content);
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}
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}
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public static void main(String... args) throws Exception {
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// Create A.java and B.java
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createSourceFile(A_SOURCE_FILE, A_SOURCE);
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createSourceFile(B_SOURCE_FILE, B_SOURCE);
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// Compile A.java
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createSourceFile(A_SOURCE_FILE, A_SOURCE);
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int ret = Main.compile(new String[] { A_SOURCE_FILE.toString() });
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if (ret != 0)
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throw new AssertionError("compilation of " + A_SOURCE_FILE + " failed");
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A_SOURCE_FILE.delete();
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// Read A.class
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final byte[] classfile = Files.readAllBytes(A_CLASS_FILE.toPath());
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// Now compile B.java with truncated versions of A.class
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for (int length = 0; length < classfile.length; length++) {
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// Write out truncated class file A.class
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try (FileOutputStream output = new FileOutputStream(A_CLASS_FILE)) {
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output.write(classfile, 0, length);
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}
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// Try to compile file B.java
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final StringWriter diags = new StringWriter();
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final String[] params = new String[] {
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"-classpath",
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".",
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"-XDrawDiagnostics",
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B_SOURCE_FILE.toString()
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};
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ret = Main.compile(params, new PrintWriter(diags, true));
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if (ret == 0)
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throw new AssertionError("compilation with truncated class file (" + length + ") succeeded?");
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final String errmsg = "compiler.misc.bad.class.truncated.at.offset: " + length;
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if (!diags.toString().contains(errmsg))
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throw new AssertionError("error message not found for truncated class file (" + length + "): " + diags);
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}
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}
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}
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