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Log JDK boot modules on startup. #8059

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Merged
mbien merged 1 commit into from
Dec 18, 2024
Merged

Log JDK boot modules on startup. #8059

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31 changes: 31 additions & 0 deletions platform/core.startup/src/org/netbeans/core/startup/TopLogging.java
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Original file line number Diff line number Diff line change
Expand Up @@ -32,16 +32,19 @@
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import java.util.Properties;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.logging.Handler;
import java.util.logging.Level;
Expand All @@ -51,6 +54,7 @@
import java.util.logging.StreamHandler;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import org.netbeans.TopSecurityManager;
import org.netbeans.core.startup.logging.NbLogging;
import org.openide.filesystems.FileUtil;
Expand Down Expand Up @@ -294,6 +298,7 @@ private void printSystemInfo(PrintStream ps) {
}
ps.println(" Application Classpath = " + cp); // NOI18N
ps.println(" Startup Classpath = " + System.getProperty("netbeans.dynamic.classpath", "unknown")); // NOI18N
ps.println(" Java Boot Modules = " + createJavaBootModuleList());
ps.println("-------------------------------------------------------------------------------"); // NOI18N
}

Expand All @@ -309,6 +314,32 @@ private static String createBootClassPath() {
return sb.toString();
}

private List<String> createJavaBootModuleList() {
// TODO JDK 11 equivalent
// return ModuleLayer.boot().modules().stream()
// .map(Module::getName)
// .sorted()
// .collect(Collectors.toList());
try {
Class<?> ml_class = Class.forName("java.lang.ModuleLayer");
Method mod_getName = Class.forName("java.lang.Module").getMethod("getName");
@SuppressWarnings("unchecked")
Set<?> mods = (Set<?>)ml_class.getDeclaredMethod("modules").invoke(
ml_class.getDeclaredMethod("boot").invoke(null)
);
return mods.stream().map(mod -> {
try {
return (String) mod_getName.invoke(mod);
} catch (ReflectiveOperationException ex) {
return "unknown"; // outer try would fail first
}
})
.sorted().collect(Collectors.toList());
} catch (ReflectiveOperationException ex) {
return Collections.emptyList();
}
}

/** Scans path list for something that can be added to classpath.
* @param extensions null or path list
* @param sb buffer to put results to
Expand Down