return stringWriter.toString();
  }

  /**
   * Returns the stack trace of {@code throwable}, possibly providing slower iteration over the full
   * trace but faster iteration over parts of the trace. Here, "slower" and "faster" are defined in
   * comparison to the normal way to access the stack trace, {@link Throwable#getStackTrace()

     * @return tree connection with increased usage count
     */
    public SmbTreeConnection acquire() {
        final long usage = this.usageCount.incrementAndGet();
        if (log.isTraceEnabled()) {
            log.trace("Acquire tree connection " + usage + " " + this);
        }

        if (usage == 1) {
            synchronized (this) {
                try (SmbTreeImpl t = getTree()) {

            assertTrue(result.contains(message));
            assertFalse(result.contains("\n"));
        }

        @Test
        @DisplayName("Should include stack trace when root cause exists")
        void testToStringWithRootCause() {
            String message = "Transport error";
            String rootMessage = "Root cause error";

    thread.join();
    // It's possible to race and suspend the thread just before the park call actually takes effect,
    // causing the thread to be suspended for 3.5 seconds, and then park itself for 2 seconds after
    // being resumed. To avoid a flake in this scenario, calculate how long that thread actually
    // waited and assert based on that time. Empirically, the race where the thread ends up waiting

import org.junit.jupiter.api.Test;
import org.mockito.Mockito;

import jcifs.CIFSContext;
import jcifs.Configuration;
import jcifs.Credentials;

/**
 * Security-focused test cases for SmbSessionImpl to verify race condition fixes.
 */
public class SmbSessionImplSecurityTest {

    private CIFSContext mockContext;
    private SmbTransportImpl mockTransport;
    private Configuration mockConfig;

# work. That's because the Proguard configuration required to make them work on
# optimized code would preclude lots of optimization, like converting enums
# into ints.

# Throwables uses internal APIs for lazy stack trace resolution
-dontnote sun.misc.SharedSecrets
-keep class sun.misc.SharedSecrets {
  *** getJavaLangAccess(...);
}
-dontnote sun.misc.JavaLangAccess
-keep class sun.misc.JavaLangAccess {
  *** getStackTraceElement(...);

    @Test
    @DisplayName("Should preserve stack trace")
    void testStackTracePreservation() {
        // When
        RuntimeCIFSException exception = new RuntimeCIFSException("Test exception");

        // Then
        assertNotNull(exception.getStackTrace());
        assertTrue(exception.getStackTrace().length > 0);

        // Should contain this test method in stack trace
        boolean foundTestMethod = false;

 */
public interface MessageBuilder extends Appendable {

    /**
     * Append message content in trace style.
     * By default, bold magenta
     *
     * @param message the message to append
     * @return the current builder
     */
    @Nonnull
    default MessageBuilder trace(Object message) {
        return style("." + Constants.MAVEN_STYLE_TRACE_NAME + ":-" + Constants.MAVEN_STYLE_TRACE_DEFAULT, message);

    @Test
    @DisplayName("Should preserve stack trace information")
    void testStackTracePreservation() {
        // When
        SmbException exception = new SmbException("Test exception");

        // Then
        assertNotNull(exception.getStackTrace());
        assertTrue(exception.getStackTrace().length > 0);

        // Should contain this test method in stack trace
        boolean foundTestMethod = false;

  fun computeIfAbsentWhenDifferentKeyRaceLostDuringCompute() {
    val tags = EmptyTags
    val atomicTags = AtomicReference<Tags>(tags)
    val result =
      atomicTags.computeIfAbsent(String::class) {
        // 'Race' by making another computeIfAbsent call. In practice this would be another thread.
        assertThat(atomicTags.computeIfAbsent(Integer::class) { 5 as Integer }).isEqualTo(5)
        "a"
      }