src/java.base/share/classes/java/lang/Throwable.java

*** 209,218 ****
--- 209,223 ----
       * @serial
       * @since 1.4
       */
      private StackTraceElement[] stackTrace = UNASSIGNED_STACK;
  
+     /**
+      * Native code sets the depth of the backtrace for later retrieval
+      */
+     private transient int depth;
+ 
      // Setting this static field introduces an acceptable
      // initialization dependency on a few java.util classes.
      private static final List<Throwable> SUPPRESSED_SENTINEL = Collections.emptyList();
  
      /**
*** 826,839 ****
          if (stackTrace == UNASSIGNED_STACK ||
              (stackTrace == null && backtrace != null) /* Out of protocol state */) {
              if (backtrace instanceof StackStreamFactory.StackTrace) {
                  stackTrace = ((StackStreamFactory.StackTrace)backtrace).getStackTraceElements();
              } else {
-                 int depth = getStackTraceDepth();
                  stackTrace = new StackTraceElement[depth];
!                 for (int i = 0; i < depth; i++)
!                     stackTrace[i] = getStackTraceElement(i);
              }
          } else if (stackTrace == null) {
              return UNASSIGNED_STACK;
          }
          return stackTrace;
--- 831,845 ----
          if (stackTrace == UNASSIGNED_STACK ||
              (stackTrace == null && backtrace != null) /* Out of protocol state */) {
              if (backtrace instanceof StackStreamFactory.StackTrace) {
                  stackTrace = ((StackStreamFactory.StackTrace)backtrace).getStackTraceElements();
              } else {
                  stackTrace = new StackTraceElement[depth];
!                 for (int i = 0; i < depth; i++) {
!                     stackTrace[i] = new StackTraceElement();
!                 }
!                 getStackTraceElements(stackTrace);
              }
          } else if (stackTrace == null) {
              return UNASSIGNED_STACK;
          }
          return stackTrace;
*** 882,908 ****
              this.stackTrace = defensiveCopy;
          }
      }
  
      /**
!      * Returns the number of elements in the stack trace (or 0 if the stack
!      * trace is unavailable).
!      *
!      * package-protection for use by SharedSecrets.
!      */
!     native int getStackTraceDepth();
! 
!     /**
!      * Returns the specified element of the stack trace.
!      *
!      * package-protection for use by SharedSecrets.
!      *
!      * @param index index of the element to return.
!      * @throws IndexOutOfBoundsException if {@code index < 0 ||
!      *         index >= getStackTraceDepth() }
       */
!     native StackTraceElement getStackTraceElement(int index);
  
      /**
       * Reads a {@code Throwable} from a stream, enforcing
       * well-formedness constraints on fields.  Null entries and
       * self-pointers are not allowed in the list of {@code
--- 888,901 ----
              this.stackTrace = defensiveCopy;
          }
      }
  
      /**
!      * @param  elements
!      * @throws IndexOutOfBoundsException if {@code elements.length != depth }
       */
!     private native void getStackTraceElements(StackTraceElement[] elements);
  
      /**
       * Reads a {@code Throwable} from a stream, enforcing
       * well-formedness constraints on fields.  Null entries and
       * self-pointers are not allowed in the list of {@code