jdk8-mips64-public/hotspot: src/share/vm/utilities/constantTag.hpp@df6caf649ff7

6700789: G1: Enable use of compressed oops with G1 heaps
Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp

     1 /*

     2  * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 // constant tags in Java .class files

    28 enum {

    29   // See jvm.h for shared JVM_CONSTANT_XXX tags

    30   // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java

    31   // Hotspot specific tags

    32   JVM_CONSTANT_Invalid                  = 0,    // For bad value initialization

    33   JVM_CONSTANT_InternalMin              = 100,  // First implementation tag (aside from bad value of course)

    34   JVM_CONSTANT_UnresolvedClass          = 100,  // Temporary tag until actual use

    35   JVM_CONSTANT_ClassIndex               = 101,  // Temporary tag while constructing constant pool

    36   JVM_CONSTANT_UnresolvedString         = 102,  // Temporary tag until actual use

    37   JVM_CONSTANT_StringIndex              = 103,  // Temporary tag while constructing constant pool

    38   JVM_CONSTANT_UnresolvedClassInError   = 104,  // Error tag due to resolution error

    39   JVM_CONSTANT_InternalMax              = 104   // Last implementation tag

    40 };

    43 class constantTag VALUE_OBJ_CLASS_SPEC {

    44  private:

    45   jbyte _tag;

    46  public:

    47   bool is_klass() const             { return _tag == JVM_CONSTANT_Class; }

    48   bool is_field () const            { return _tag == JVM_CONSTANT_Fieldref; }

    49   bool is_method() const            { return _tag == JVM_CONSTANT_Methodref; }

    50   bool is_interface_method() const  { return _tag == JVM_CONSTANT_InterfaceMethodref; }

    51   bool is_string() const            { return _tag == JVM_CONSTANT_String; }

    52   bool is_int() const               { return _tag == JVM_CONSTANT_Integer; }

    53   bool is_float() const             { return _tag == JVM_CONSTANT_Float; }

    54   bool is_long() const              { return _tag == JVM_CONSTANT_Long; }

    55   bool is_double() const            { return _tag == JVM_CONSTANT_Double; }

    56   bool is_name_and_type() const     { return _tag == JVM_CONSTANT_NameAndType; }

    57   bool is_utf8() const              { return _tag == JVM_CONSTANT_Utf8; }

    59   bool is_invalid() const           { return _tag == JVM_CONSTANT_Invalid; }

    61   bool is_unresolved_klass() const {

    62     return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError;

    63   }

    65   bool is_unresolved_klass_in_error() const {

    66     return _tag == JVM_CONSTANT_UnresolvedClassInError;

    67   }

    69   bool is_klass_index() const       { return _tag == JVM_CONSTANT_ClassIndex; }

    70   bool is_unresolved_string() const { return _tag == JVM_CONSTANT_UnresolvedString; }

    71   bool is_string_index() const      { return _tag == JVM_CONSTANT_StringIndex; }

    73   bool is_klass_reference() const   { return is_klass_index() || is_unresolved_klass(); }

    74   bool is_klass_or_reference() const{ return is_klass() || is_klass_reference(); }

    75   bool is_field_or_method() const   { return is_field() || is_method() || is_interface_method(); }

    76   bool is_symbol() const            { return is_utf8(); }

    78   constantTag(jbyte tag) {

    79     assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) ||

    80            (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag");

    81     _tag = tag;

    82   }

    84   jbyte value()                      { return _tag; }

    86   void print_on(outputStream* st) const PRODUCT_RETURN;

    87 };

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

src/share/vm/utilities/constantTag.hpp@df6caf649ff7

src/share/vm/utilities/constantTag.hpp