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  1. JDK
  2. JDK-8254737

The sun.java2d.cmm.ProfileDeferralMgr class is not thread safe

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    • Icon: Bug Bug
    • Resolution: Duplicate
    • Icon: P4 P4
    • tbd
    • 11, 16
    • client-libs
    • 2d
    • generic
    • generic

      Accidentally caught the suspicious exception that the reference to the CMM profile is null. Looks like the problem is in the deferral machinery it does not thread-safe:
      The test which always triggers this bug:

      import java.awt.color.ColorSpace;
      import java.awt.color.ICC_Profile;
      import java.awt.color.ICC_ProfileRGB;
      import java.util.concurrent.CountDownLatch;

      public final class MTInitCMM {

          public static void main(String[] args) throws Exception {
              var rgb = (ICC_ProfileRGB) ICC_Profile.getInstance(ColorSpace.CS_sRGB);
              Thread[] threads = new Thread[100];
              CountDownLatch go = new CountDownLatch(1);
              for (int i = 0; i < threads.length; i++) {
                  threads[i] = new Thread(() -> {
                      try {
                          go.await();
                      } catch (InterruptedException e) {
                          throw new RuntimeException(e);
                      }
                      rgb.getMatrix();
                  });
              }
              for (Thread thread : threads) {
                  thread.start();
              }
              go.countDown();
              for (Thread thread : threads) {
                  thread.join();
              }
          }
      }
      ==========
      The output:
      java.lang.NullPointerException: Cannot load from byte/boolean array because "array" is null
      at java.desktop/java.awt.color.ICC_Profile.intFromBigEndian(ICC_Profile.java:1741)
      at java.desktop/java.awt.color.ICC_Profile.getXYZTag(ICC_Profile.java:1542)
      at java.desktop/java.awt.color.ICC_ProfileRGB.getMatrix(ICC_ProfileRGB.java:149)
      at MTInitCMM.lambda$main$0(MTInitCMM.java:19)
      at java.base/java.lang.Thread.run(Thread.java:832)

            serb Sergey Bylokhov
            serb Sergey Bylokhov
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              Created:
              Updated:
              Resolved: