113 lines
3.7 KiB
Java
113 lines
3.7 KiB
Java
/*
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* Copyright (c) 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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* @bug 8034066
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* @summary javap incorrect indentation when CodeWriter called via ClassWriter
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* @run main ClassWriterCodeIndentTest
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* @modules jdk.jdeps/com.sun.tools.javap
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*/
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import java.io.*;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class ClassWriterCodeIndentTest {
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public static void main(String[] args) {
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new ClassWriterCodeIndentTest().run();
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}
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public void run() {
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/*
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* Partial expected output within a larger file. There exists another "Code: " section above, and thus we
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* select the second occurrence in `findNthMatchPrecedingSpaces(output, "Code:", 1);`
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* ...
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* Code:
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* 0: iconst_0
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* 1: istore_1
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* StackMap locals: this int
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* StackMap stack:
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* ...
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*/
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String output = javap();
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int codeHeaderIndent = findNthMatchPrecedingSpaces(output, "Code:", 1);
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int detailIndent = findNthMatchPrecedingSpaces(output, "StackMap ", 0);
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int bytecodeIndent = findNthMatchPrecedingSpaces(output, "0: iconst_0", 0);
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if (detailIndent - codeHeaderIndent != 2) {
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error("Details are not indented correctly with respect to code header.");
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}
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if (bytecodeIndent - codeHeaderIndent != 5) {
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error("Bytecode is not indented correctly with respect to code header.");
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}
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if (errors > 0) {
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throw new Error(errors + " found.");
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}
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}
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String javap() {
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StringWriter sw = new StringWriter();
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PrintWriter out = new PrintWriter(sw);
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int rc = com.sun.tools.javap.Main.run(new String[]{"-c", "-XDdetails:stackMaps",
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System.getProperty("test.classes") + "/EmptyLoop.class"}, out);
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if (rc != 0)
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throw new Error("javap failed. rc=" + rc);
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out.close();
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System.out.println(sw.toString());
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return sw.toString();
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}
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public static int findNthMatchPrecedingSpaces(String inputString, String searchString, int occurrence) {
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String regex = "^(\\s*)" + Pattern.quote(searchString);
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Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
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Matcher matcher = pattern.matcher(inputString);
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int count = 0;
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while (matcher.find()) {
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if (count == occurrence) {
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return matcher.group(1).length();
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}
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count++;
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}
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throw new Error("Could not find " + searchString + " in " + inputString);
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}
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void error(String msg) {
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System.err.println(msg);
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errors++;
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}
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int errors;
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}
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class EmptyLoop {
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public void emptyLoop() {
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for (int i = 0; i < 10; i++) {
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}
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}
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} |