src/java.base/share/classes/jdk/internal/vm/ThreadSnapshot.java

@@ -28,11 +28,11 @@
  import java.util.stream.Stream;
  
  /**
   * Represents a snapshot of information about a Thread.
   */
- class ThreadSnapshot {
+ public class ThreadSnapshot {
      private static final StackTraceElement[] EMPTY_STACK = new StackTraceElement[0];
      private static final ThreadLock[] EMPTY_LOCKS = new ThreadLock[0];
  
      // filled by VM
      private String name;

@@ -52,18 +52,16 @@
  
      private ThreadSnapshot() {}
  
      /**
       * Take a snapshot of a Thread to get all information about the thread.
-      * Return null if a ThreadSnapshot is not created, for example if the
-      * thread has terminated.
-      * @throws UnsupportedOperationException if not supported by VM
+      * Return null if the thread is not alive.
       */
-     static ThreadSnapshot of(Thread thread) {
+     public static ThreadSnapshot of(Thread thread) {
          ThreadSnapshot snapshot = create(thread);
          if (snapshot == null) {
-             return null; // thread terminated
+             return null; // thread not alive
          }
          if (snapshot.stackTrace == null) {
              snapshot.stackTrace = EMPTY_STACK;
          }
          if (snapshot.locks != null) {

@@ -96,11 +94,11 @@
      }
  
      /**
       * Returns the thread stack trace.
       */
-     StackTraceElement[] stackTrace() {
+     public StackTraceElement[] stackTrace() {
          return stackTrace;
      }
  
      /**
       * Returns the thread's parkBlocker.