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

*** 1,7 ****
  /*
!  * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 24,55 ****
   */
  package java.lang;
  
  import jdk.internal.access.JavaLangInvokeAccess;
  import jdk.internal.access.SharedSecrets;
  
  import java.lang.StackWalker.StackFrame;
  import java.lang.invoke.MethodType;
  
  class StackFrameInfo implements StackFrame {
!     private final byte RETAIN_CLASS_REF = 0x01;
  
      private final static JavaLangInvokeAccess JLIA =
          SharedSecrets.getJavaLangInvokeAccess();
  
      private final byte flags;
!     private final Object memberName;
!     private final short bci;
      private volatile StackTraceElement ste;
  
      /*
!      * Create StackFrameInfo for StackFrameTraverser and LiveStackFrameTraverser
!      * to use
       */
      StackFrameInfo(StackWalker walker) {
          this.flags = walker.retainClassRef ? RETAIN_CLASS_REF : 0;
-         this.bci = -1;
          this.memberName = JLIA.newMemberName();
      }
  
      // package-private called by StackStreamFactory to skip
      // the capability check
--- 24,58 ----
   */
  package java.lang;
  
  import jdk.internal.access.JavaLangInvokeAccess;
  import jdk.internal.access.SharedSecrets;
+ import jdk.internal.vm.annotation.Stable;
  
  import java.lang.StackWalker.StackFrame;
  import java.lang.invoke.MethodType;
  
  class StackFrameInfo implements StackFrame {
!     private final static byte RETAIN_CLASS_REF = 0x01;
  
      private final static JavaLangInvokeAccess JLIA =
          SharedSecrets.getJavaLangInvokeAccess();
  
      private final byte flags;
!     private final Object memberName;    // MemberName initialized by VM
!     private @Stable int bci = -1;       // BCI set by VM
      private volatile StackTraceElement ste;
  
      /*
!      * Construct an empty StackFrameInfo object that will be filled by the VM
!      * during stack walking.
!      *
!      * @see StackStreamFactory.AbstractStackWalker#callStackWalk
!      * @see StackStreamFactory.AbstractStackWalker#fetchStackFrames
       */
      StackFrameInfo(StackWalker walker) {
          this.flags = walker.retainClassRef ? RETAIN_CLASS_REF : 0;
          this.memberName = JLIA.newMemberName();
      }
  
      // package-private called by StackStreamFactory to skip
      // the capability check