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*
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* version 2 for more details (a copy is included in the LICENSE file that
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
/*
* @test
* @bug 7092965
* @summary javac should not close processorClassLoader before end of compilation
* @modules jdk.compiler/com.sun.tools.javac.api
* jdk.compiler/com.sun.tools.javac.file
*/
import com.sun.source.util.JavacTask;
import com.sun.source.util.TaskEvent;
import com.sun.source.util.TaskListener;
import com.sun.tools.javac.api.ClientCodeWrapper.Trusted;
import com.sun.tools.javac.api.BasicJavacTask;
import com.sun.tools.javac.api.JavacTool;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.lang.reflect.Field;
import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import javax.annotation.processing.ProcessingEnvironment;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.StandardLocation;
import javax.tools.ToolProvider;
/*
* The test compiles an annotation processor and a helper class into a
* custom classes directory.
*
* It then uses them while compiling a dummy file, with the custom classes
* directory on the processor path, thus guaranteeing that references to
* these class are satisfied by the processor class loader.
*
* The annotation processor uses the javac TaskListener to run code
* after annotation processing has completed, to verify that the classloader
* is not closed until the end of the compilation.
*/
@Trusted // avoids use of ClientCodeWrapper
public class TestClose implements TaskListener {
public static final String annoProc =
"import java.util.*;\n" +
"import javax.annotation.processing.*;\n" +
"import javax.lang.model.*;\n" +
"import javax.lang.model.element.*;\n" +
"import com.sun.source.util.*;\n" +
"import com.sun.tools.javac.processing.*;\n" +
"import com.sun.tools.javac.util.*;\n" +
"@SupportedAnnotationTypes(\"*\")\n" +
"public class AnnoProc extends AbstractProcessor {\n" +
" @Override\n" +
" public SourceVersion getSupportedSourceVersion() {\n" +
" return SourceVersion.latest();\n" +
" }\n" +
" @Override\n" +
" public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {\n" +
" System.out.println(\"in AnnoProc.process\");\n" +
" final ClassLoader cl = getClass().getClassLoader();\n" +
" if (roundEnv.processingOver()) {\n" +
" TestClose.add(processingEnv, new Runnable() {\n" +
" public void run() {\n" +
" System.out.println(getClass().getName() + \": run()\");\n" +
" try {\n" +
" cl.loadClass(\"Callback\")\n" +
" .asSubclass(Runnable.class)\n" +
" .newInstance()\n" +
" .run();\n" +
" } catch (ReflectiveOperationException e) {\n" +
" throw new Error(e);\n" +
" }\n" +
" }\n" +
" });\n" +
" }\n" +
" return true;\n" +
" }\n" +
"}\n";
public static final String callback =
"public class Callback implements Runnable {\n" +
" public void run() {\n" +
" System.out.println(getClass().getName() + \": run()\");\n" +
" }\n" +
"}";
public static void main(String... args) throws Exception {
new TestClose().run();
}
void run() throws IOException {
JavacTool tool = (JavacTool) ToolProvider.getSystemJavaCompiler();
try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {
File classes = new File("classes");
classes.mkdirs();
File extraClasses = new File("extraClasses");
extraClasses.mkdirs();
System.out.println("compiling classes to extraClasses");
{ // setup class in extraClasses
fm.setLocation(StandardLocation.CLASS_OUTPUT,
Collections.singleton(extraClasses));
List<? extends JavaFileObject> files = Arrays.asList(
new MemFile("AnnoProc.java", annoProc),
new MemFile("Callback.java", callback));
List<String> options = Arrays.asList(
"--add-exports", "jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED",
"--add-exports", "jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED",
"-XDaccessInternalAPI");
JavacTask task = tool.getTask(null, fm, null, options, null, files);
check(task.call());
}
System.out.println("compiling dummy to classes with anno processor");
{ // use that class in a TaskListener after processing has completed
PrintStream prev = System.out;
String out;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try (PrintStream ps = new PrintStream(baos)) {
System.setOut(ps);
File testClasses = new File(System.getProperty("test.classes"));
fm.setLocation(StandardLocation.CLASS_OUTPUT,
Collections.singleton(classes));
fm.setLocation(StandardLocation.ANNOTATION_PROCESSOR_PATH,
Arrays.asList(extraClasses, testClasses));
List<? extends JavaFileObject> files = Arrays.asList(
new MemFile("my://dummy", "class Dummy { }"));
List<String> options = Arrays.asList("-XDaccessInternalAPI", "-processor", "AnnoProc");
JavacTask task = tool.getTask(null, fm, null, options, null, files);
task.setTaskListener(this);
check(task.call());
} finally {
System.setOut(prev);
out = baos.toString();
if (!out.isEmpty())
System.out.println(out);
}
check(out.contains("AnnoProc$1: run()"));
check(out.contains("Callback: run()"));
}
}
}
@Override
public void started(TaskEvent e) {
System.out.println("Started: " + e);
}
@Override
public void finished(TaskEvent e) {
System.out.println("Finished: " + e);
if (e.getKind() == TaskEvent.Kind.ANALYZE) {
for (Runnable r: runnables) {
System.out.println("running " + r);
r.run();
}
}
}
void check(boolean b) {
if (!b)
throw new AssertionError();
}
public static void add(ProcessingEnvironment env, Runnable r) {
// ensure this class in this class loader can access javac internals
try {
JavacTask task = JavacTask.instance(env);
TaskListener l = ((BasicJavacTask) task).getTaskListeners().iterator().next();
// The TaskListener is an instanceof TestClose, but when using the
// default class loaders. the taskListener uses a different
// instance of Class<TestClose> than the anno processor.
// If you try to evaluate
// TestClose tc = (TestClose) (l).
// you get the following somewhat confusing error:
// java.lang.ClassCastException: TestClose cannot be cast to TestClose
// The workaround is to access the fields of TestClose with reflection.
Field f = l.getClass().getField("runnables");
@SuppressWarnings("unchecked")
List<Runnable> runnables = (List<Runnable>) f.get(l);
runnables.add(r);
} catch (Throwable t) {
t.printStackTrace();
}
}
public List<Runnable> runnables = new ArrayList<>();
class MemFile extends SimpleJavaFileObject {
public final String text;
MemFile(String name, String text) {
super(URI.create(name), JavaFileObject.Kind.SOURCE);
this.text = text;
}
@Override
public String getName() {
return uri.toString();
}
@Override
public String getCharContent(boolean ignoreEncodingErrors) {
return text;
}
}
}