42     static final Unsafe UNSAFE = Unsafe.getUnsafe();
  43 
  44     static final boolean DEBUG_METHOD_HANDLE_NAMES;
  45     static final boolean DUMP_CLASS_FILES;
  46     static final boolean TRACE_INTERPRETER;
  47     static final boolean TRACE_METHOD_LINKAGE;
  48     static final boolean USE_LAMBDA_FORM_EDITOR;
  49     static final int COMPILE_THRESHOLD;
  50     static final int DONT_INLINE_THRESHOLD;
  51     static final int PROFILE_LEVEL;
  52 
  53     static {
  54         final Object[] values = new Object[8];
  55         AccessController.doPrivileged(new PrivilegedAction<Void>() {
  56                 public Void run() {
  57                     values[0] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DEBUG_NAMES");
  58                     values[1] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DUMP_CLASS_FILES");
  59                     values[2] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_INTERPRETER");
  60                     values[3] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_METHOD_LINKAGE");
  61                     values[4] = Boolean.getBoolean("java.lang.invoke.MethodHandle.USE_LF_EDITOR");
  62                     values[5] = Integer.getInteger("java.lang.invoke.MethodHandle.COMPILE_THRESHOLD", 30);
  63                     values[6] = Integer.getInteger("java.lang.invoke.MethodHandle.DONT_INLINE_THRESHOLD", 30);
  64                     values[7] = Integer.getInteger("java.lang.invoke.MethodHandle.PROFILE_LEVEL", 0);
  65                     return null;
  66                 }
  67             });
  68         DEBUG_METHOD_HANDLE_NAMES = (Boolean) values[0];
  69         DUMP_CLASS_FILES          = (Boolean) values[1];
  70         TRACE_INTERPRETER         = (Boolean) values[2];
  71         TRACE_METHOD_LINKAGE      = (Boolean) values[3];
  72         USE_LAMBDA_FORM_EDITOR    = (Boolean) values[4];
  73         COMPILE_THRESHOLD         = (Integer) values[5];
  74         DONT_INLINE_THRESHOLD     = (Integer) values[6];
  75         PROFILE_LEVEL             = (Integer) values[7];
  76     }
  77 
  78     /** Tell if any of the debugging switches are turned on.
  79      *  If this is the case, it is reasonable to perform extra checks or save extra information.
  80      */
  81     /*non-public*/ static boolean debugEnabled() {
  82         return (DEBUG_METHOD_HANDLE_NAMES |

  42     static final Unsafe UNSAFE = Unsafe.getUnsafe();
  43 
  44     static final boolean DEBUG_METHOD_HANDLE_NAMES;
  45     static final boolean DUMP_CLASS_FILES;
  46     static final boolean TRACE_INTERPRETER;
  47     static final boolean TRACE_METHOD_LINKAGE;
  48     static final boolean USE_LAMBDA_FORM_EDITOR;
  49     static final int COMPILE_THRESHOLD;
  50     static final int DONT_INLINE_THRESHOLD;
  51     static final int PROFILE_LEVEL;
  52 
  53     static {
  54         final Object[] values = new Object[8];
  55         AccessController.doPrivileged(new PrivilegedAction<Void>() {
  56                 public Void run() {
  57                     values[0] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DEBUG_NAMES");
  58                     values[1] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DUMP_CLASS_FILES");
  59                     values[2] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_INTERPRETER");
  60                     values[3] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_METHOD_LINKAGE");
  61                     values[4] = Boolean.getBoolean("java.lang.invoke.MethodHandle.USE_LF_EDITOR");
  62                     values[5] = Integer.getInteger("java.lang.invoke.MethodHandle.COMPILE_THRESHOLD", 0);
  63                     values[6] = Integer.getInteger("java.lang.invoke.MethodHandle.DONT_INLINE_THRESHOLD", 30);
  64                     values[7] = Integer.getInteger("java.lang.invoke.MethodHandle.PROFILE_LEVEL", 0);
  65                     return null;
  66                 }
  67             });
  68         DEBUG_METHOD_HANDLE_NAMES = (Boolean) values[0];
  69         DUMP_CLASS_FILES          = (Boolean) values[1];
  70         TRACE_INTERPRETER         = (Boolean) values[2];
  71         TRACE_METHOD_LINKAGE      = (Boolean) values[3];
  72         USE_LAMBDA_FORM_EDITOR    = (Boolean) values[4];
  73         COMPILE_THRESHOLD         = (Integer) values[5];
  74         DONT_INLINE_THRESHOLD     = (Integer) values[6];
  75         PROFILE_LEVEL             = (Integer) values[7];
  76     }
  77 
  78     /** Tell if any of the debugging switches are turned on.
  79      *  If this is the case, it is reasonable to perform extra checks or save extra information.
  80      */
  81     /*non-public*/ static boolean debugEnabled() {
  82         return (DEBUG_METHOD_HANDLE_NAMES |