src/jdk.vm.ci/share/classes/jdk.vm.ci.code/src/jdk/vm/ci/code/BytecodeFrame.java

*** 96,105 ****
--- 96,110 ----
       * position, the interpreter will rethrow the exception instead of executing the bytecode
       * instruction at this position.
       */
      public final boolean rethrowException;
  
+     /**
+      * Specifies if this object represents a frame state in the middle of executing a call. If
+      * true, the arguments to the call have been popped from the stack and the return value (for a
+      * non-void call) has not yet been pushed.
+      */
      public final boolean duringCall;
  
      /**
       * This BCI should be used for frame states that are built for code with no meaningful BCI.
       */