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* 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 ) .
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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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package jdk.jfr.event.runtime;
import static jdk.test.lib.Asserts.assertEquals;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import jdk.jfr.Recording;
import jdk.jfr.consumer.RecordedEvent;
import jdk.jfr.consumer.RecordedObject;
import jdk.test.lib.jfr.EventNames;
import jdk.test.lib.jfr.Events;
/**
* @ test
* @ summary Tests the JFR events related to modules
* @ key jfr
* @ requires vm . hasJFR
* @ requires ! vm . graal . enabled
* @ library / test / lib
* @ run main / othervm - - limit - modules java . base , jdk . jfr jdk . jfr . event . runtime . TestModuleEvents
*/
public final class TestModuleEvents {
private static final String MODULE_EXPORT_EVENT_NAME = EventNames.ModuleExport;
private static final String MODULE_REQUIRE_EVENT_NAME = EventNames.ModuleRequire;
private static final String UNNAMED = "<unnamed>" ;
public static void main(String[] args) throws Throwable {
verifyRequiredModules();
verifyExportedModules();
}
private static void verifyRequiredModules() throws Throwable {
Recording recording = new Recording();
recording.enable(MODULE_REQUIRE_EVENT_NAME);
recording.start();
recording.stop();
List<RecordedEvent> events = Events.fromRecording(recording);
assertDependency(events, "jdk.jfr" , "java.base" ); // jdk.jfr requires java.base (by default)
assertDependency(events, "java.base" , "jdk.jfr" ); // java.base requires jdk.jfr for JDK events, i.e. FileRead
recording.close();
}
private static void assertDependency(List<RecordedEvent> events, String source, String required) throws Exception {
for (RecordedEvent e : events) {
String sourceModule = e.getValue("source.name" );
if (source.equals(sourceModule)) {
RecordedObject module = e.getValue("requiredModule" );
if (module != null ) {
if (required.equals(module.getValue("name" ))) {
return ;
}
}
}
}
throw new Exception("Could not find module dependency between " + source + " and requires modeule " + required);
}
private static void verifyExportedModules() throws Throwable {
Recording recording = new Recording();
recording.enable(MODULE_EXPORT_EVENT_NAME);
recording.start();
recording.stop();
Map<String, String> edges = new HashMap<>();
List<RecordedEvent> events = Events.fromRecording(recording);
events.stream().forEach((ev) -> {
String exportedPackage = getValue(ev.getValue("exportedPackage" ), "name" , UNNAMED);
String toModule = getValue(ev.getValue("targetModule" ), "name" , UNNAMED);
if (!toModule.equals("jdk.proxy1" )) { // ignore jdk.proxy1 module
edges.put(exportedPackage, toModule);
}
});
// We expect
// 1) jdk.jfr -> <unnamed> (because we use the package)
// 2) java.util -> <unnamed> (because we use the package)
// 3) jdk.jfr.events -> java.base (from the jfr design)
// 4) jdk.internal -> jdk.jfr (from the jfr design)
// Where 'a -> b' means "package 'a' exported to module 'b'"
assertEquals(edges.get("jdk/jfr" ), UNNAMED);
assertEquals(edges.get("java/util" ), UNNAMED);
assertEquals(edges.get("jdk/jfr/events" ), "java.base" );
assertEquals(edges.get("jdk/internal/vm/annotation" ), "jdk.jfr" );
recording.close();
}
// Helper function to get field from a RecordedObject
private static String getValue(RecordedObject ro, String field, String defVal) {
if (ro != null && ro.getValue(field) != null ) {
return ro.getValue(field);
} else {
return defVal;
}
}
}
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