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/*
* Copyright (c) 2017, 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
* @bug 8180141
* @summary Missing entry in LineNumberTable for break statement that jumps out of try-finally
* @modules jdk.jdeps/com.sun.tools.classfile
* jdk.compiler/com.sun.tools.javac.code
* jdk.compiler/com.sun.tools.javac.comp
* jdk.compiler/com.sun.tools.javac.file
* jdk.compiler/com.sun.tools.javac.main
* jdk.compiler/com.sun.tools.javac.tree
* jdk.compiler/com.sun.tools.javac.util
* @compile -g MissingLNTEntryForFinalizerTest.java
* @run main MissingLNTEntryForFinalizerTest
*/
import java.io.File;
import java.net.URI;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import com.sun.tools.classfile.*;
import com.sun.tools.javac.comp.Attr;
import com.sun.tools.javac.comp.AttrContext;
import com.sun.tools.javac.comp.Env;
import com.sun.tools.javac.comp.Modules;
import com.sun.tools.javac.file.JavacFileManager;
import com.sun.tools.javac.main.JavaCompiler;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.*;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.List;
import static com.sun.tools.javac.util.List.of;
import static com.sun.tools.javac.tree.JCTree.Tag.*;
public class MissingLNTEntryForFinalizerTest {
protected ReusableJavaCompiler tool;
Context context;
MissingLNTEntryForFinalizerTest() {
context = new Context();
JavacFileManager.preRegister(context);
MyAttr.preRegister(context);
tool = new ReusableJavaCompiler(context);
}
public static void main(String... args) throws Throwable {
new MissingLNTEntryForFinalizerTest().test();
}
void test() throws Throwable {
JavaSource source = new JavaSource("1");
tool.clear();
List<JavaFileObject> inputs = of(source);
try {
tool.compile(inputs);
} catch (Throwable ex) {
throw new AssertionError(ex);
}
File testClasses = new File(".");
File file = new File(testClasses, "Test1.class");
ClassFile classFile = ClassFile.read(file);
for (Method m : classFile.methods) {
if (classFile.constant_pool.getUTF8Value(m.name_index).equals("foo")) {
Code_attribute code = (Code_attribute)m.attributes.get(Attribute.Code);
LineNumberTable_attribute lnt = (LineNumberTable_attribute)code.attributes.get(Attribute.LineNumberTable);
checkLNT(lnt, MyAttr.lineNumber);
}
}
}
void checkLNT(LineNumberTable_attribute lnt, int lineToCheckFor) {
for (LineNumberTable_attribute.Entry e: lnt.line_number_table) {
if (e.line_number == lineToCheckFor) {
return;
}
}
throw new AssertionError("seek line number not found in the LNT for method foo()");
}
class JavaSource extends SimpleJavaFileObject {
String id;
String template =
"import java.util.*;\n" +
"class Test#Id {\n" +
" void foo() {\n" +
" List<String> l = null;\n" +
" String first = null;\n" +
" try {\n" +
" first = l.get(0);\n" +
" } finally {\n" +
" if (first != null) {\n" +
" System.out.println(\"finalizer\");\n" +
" }\n" +
" }\n" +
" }\n" +
"}";
JavaSource(String id) {
super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
this.id = id;
}
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
return template.replace("#Id", id);
}
}
/* this class has been set up to do not depend on a fixed line number, this Attr subclass will
* look for 'break' or 'continue' statements in order to find the actual line number they occupy.
* This way the test can find if that line number appears in the LNT generated for a given class.
*/
static class MyAttr extends Attr {
static int lineNumber;
static void preRegister(Context context) {
context.put(attrKey, (com.sun.tools.javac.util.Context.Factory<Attr>) c -> new MyAttr(c));
}
MyAttr(Context context) {
super(context);
}
@Override
public com.sun.tools.javac.code.Type attribStat(JCTree tree, Env<AttrContext> env) {
com.sun.tools.javac.code.Type result = super.attribStat(tree, env);
if (tree.hasTag(TRY)) {
JCTry tryTree = (JCTry)tree;
lineNumber = env.toplevel.lineMap.getLineNumber(tryTree.finalizer.endpos);
}
return result;
}
}
static class ReusableJavaCompiler extends JavaCompiler {
ReusableJavaCompiler(Context context) {
super(context);
}
@Override
protected void checkReusable() {
// do nothing
}
@Override
public void close() {
//do nothing
}
void clear() {
newRound();
Modules.instance(context).newRound();
}
}
}
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