Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/share/vm/services/serviceUtil.hpp	Sat Dec 01 00:00:00 2007 +0000
     1.3 @@ -0,0 +1,89 @@
     1.4 +/*
     1.5 + * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
    1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
    1.24 + * have any questions.
    1.25 + *
    1.26 + */
    1.27 +
    1.28 +//
    1.29 +// Serviceability utility functions.
    1.30 +// (Shared by MM and JVMTI).
    1.31 +//
    1.32 +class ServiceUtil : public AllStatic {
    1.33 + public:
    1.34 +
    1.35 +  // Return true if oop represents an object that is "visible"
    1.36 +  // to the java world.
    1.37 +  static inline bool visible_oop(oop o) {
    1.38 +    // the sentinel for deleted handles isn't visible
    1.39 +    if (o == JNIHandles::deleted_handle()) {
    1.40 +      return false;
    1.41 +    }
    1.42 +
    1.43 +    // ignore KlassKlass
    1.44 +    if (o->is_klass()) {
    1.45 +      return false;
    1.46 +    }
    1.47 +
    1.48 +    // instance
    1.49 +    if (o->is_instance()) {
    1.50 +      // instance objects are visible
    1.51 +      if (o->klass() != SystemDictionary::class_klass()) {
    1.52 +        return true;
    1.53 +      }
    1.54 +      if (java_lang_Class::is_primitive(o)) {
    1.55 +        return true;
    1.56 +      }
    1.57 +      // java.lang.Classes are visible
    1.58 +      o = java_lang_Class::as_klassOop(o);
    1.59 +      if (o->is_klass()) {
    1.60 +        // if it's a class for an object, an object array, or
    1.61 +        // primitive (type) array then it's visible.
    1.62 +        klassOop klass = (klassOop)o;
    1.63 +        if (Klass::cast(klass)->oop_is_instance()) {
    1.64 +          return true;
    1.65 +        }
    1.66 +        if (Klass::cast(klass)->oop_is_objArray()) {
    1.67 +          return true;
    1.68 +        }
    1.69 +        if (Klass::cast(klass)->oop_is_typeArray()) {
    1.70 +          return true;
    1.71 +        }
    1.72 +      }
    1.73 +      return false;
    1.74 +    }
    1.75 +    // object arrays are visible if they aren't system object arrays
    1.76 +    if (o->is_objArray()) {
    1.77 +      objArrayOop array = (objArrayOop)o;
    1.78 +      if (array->klass() != Universe::systemObjArrayKlassObj()) {
    1.79 +        return true;
    1.80 +      } else {
    1.81 +        return false;
    1.82 +      }
    1.83 +    }
    1.84 +    // type arrays are visible
    1.85 +    if (o->is_typeArray()) {
    1.86 +      return true;
    1.87 +    }
    1.88 +    // everything else (methodOops, ...) aren't visible
    1.89 +    return false;
    1.90 +  };   // end of visible_oop()
    1.91 +
    1.92 +};