jdk8-mips64-public/langtools: comparison test/tools/javac/T8022186/DeadCodeGeneratedForEmptyTryTest.java

--1:000000000000
+:959103a6100f
+/*
+* Copyright (c) 2013, 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.  Oracle designates this
+* particular file as subject to the "Classpath" exception as provided
+* by Oracle in the LICENSE file that accompanied this code.
+*
+* 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
+* @bug 8022186
+* @summary javac generates dead code if a try with an empty body has a finalizer
+*/
+import com.sun.tools.classfile.Attribute;
+import com.sun.tools.classfile.ClassFile;
+import com.sun.tools.classfile.Code_attribute;
+import com.sun.tools.classfile.ConstantPool;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_String_info;
+import com.sun.tools.classfile.ConstantPool.CPInfo;
+import com.sun.tools.classfile.ConstantPool.InvalidIndex;
+import com.sun.tools.classfile.Instruction;
+import com.sun.tools.classfile.Instruction.KindVisitor;
+import com.sun.tools.classfile.Instruction.TypeKind;
+import com.sun.tools.classfile.Method;
+import com.sun.tools.javac.util.Assert;
+import java.io.BufferedInputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+public class DeadCodeGeneratedForEmptyTryTest {
+public static void main(String[] args) throws Exception {
+new DeadCodeGeneratedForEmptyTryTest().run();
+}
+void run() throws Exception {
+checkClassFile(Paths.get(System.getProperty("test.classes"),
+this.getClass().getName() + "$Test.class"));
+}
+int utf8Index;
+int numberOfRefToStr = 0;
+ConstantPool constantPool;
+void checkClassFile(final Path path) throws Exception {
+ClassFile classFile = ClassFile.read(
+new BufferedInputStream(Files.newInputStream(path)));
+constantPool = classFile.constant_pool;
+utf8Index = constantPool.getUTF8Index("STR_TO_LOOK_FOR");
+for (Method method: classFile.methods) {
+if (method.getName(constantPool).equals("methodToLookFor")) {
+Code_attribute codeAtt = (Code_attribute)method.attributes.get(Attribute.Code);
+for (Instruction inst: codeAtt.getInstructions()) {
+inst.accept(codeVisitor, null);
+}
+}
+}
+Assert.check(numberOfRefToStr == 1,
+"There should only be one reference to a CONSTANT_String_info structure in the generated code");
+}
+CodeVisitor codeVisitor = new CodeVisitor();
+class CodeVisitor implements KindVisitor<Void, Void> {
+void checkIndirectRefToString(int cp_index) {
+try {
+CPInfo cInfo = constantPool.get(cp_index);
+if (cInfo instanceof CONSTANT_String_info) {
+CONSTANT_String_info strInfo = (CONSTANT_String_info)cInfo;
+if (strInfo.string_index == utf8Index) {
+numberOfRefToStr++;
+}
+}
+} catch (InvalidIndex ex) {
+throw new AssertionError("invalid constant pool index at " + cp_index);
+}
+}
+@Override
+public Void visitNoOperands(Instruction instr, Void p) {
+return null;
+}
+@Override
+public Void visitArrayType(Instruction instr, TypeKind kind, Void p) {
+return null;
+}
+@Override
+public Void visitBranch(Instruction instr, int offset, Void p) {
+return null;
+}
+@Override
+public Void visitConstantPoolRef(Instruction instr, int index, Void p) {
+checkIndirectRefToString(index);
+return null;
+}
+@Override
+public Void visitConstantPoolRefAndValue(Instruction instr, int index, int value, Void p) {
+checkIndirectRefToString(index);
+return null;
+}
+@Override
+public Void visitLocal(Instruction instr, int index, Void p) {
+return null;
+}
+@Override
+public Void visitLocalAndValue(Instruction instr, int index, int value, Void p) {
+return null;
+}
+@Override
+public Void visitLookupSwitch(Instruction instr, int default_, int npairs, int[] matches, int[] offsets, Void p) {
+return null;
+}
+@Override
+public Void visitTableSwitch(Instruction instr, int default_, int low, int high, int[] offsets, Void p) {
+return null;
+}
+@Override
+public Void visitValue(Instruction instr, int value, Void p) {
+return null;
+}
+@Override
+public Void visitUnknown(Instruction instr, Void p) {
+return null;
+}
+}
+public class Test {
+void methodToLookFor() {
+try {
+} finally {
+System.out.println("STR_TO_LOOK_FOR");
+}
+}
+}
+}

Mercurial > jdk8-mips64-public > langtools / file comparison

comparison: test/tools/javac/T8022186/DeadCodeGeneratedForEmptyTryTest.java

test/tools/javac/T8022186/DeadCodeGeneratedForEmptyTryTest.java