annotate src/share/vm/utilities/constantTag.hpp @ 1838:3b2dea75431e

6984311: JSR 292 needs optional bootstrap method parameters Summary: Allow CONSTANT_InvokeDynamic nodes to have any number of extra operands. Reviewed-by: twisti
author jrose
date Sat, 30 Oct 2010 13:08:23 -0700
parents 083fde3b838e
children f95d63e2154a
rev   line source
duke@0 1 /*
jrose@1838 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1472 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1472 20 * or visit www.oracle.com if you need additional information or have any
trims@1472 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
duke@0 25 // constant tags in Java .class files
duke@0 26
duke@0 27
duke@0 28 enum {
duke@0 29 // See jvm.h for shared JVM_CONSTANT_XXX tags
duke@0 30 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java
duke@0 31 // Hotspot specific tags
duke@0 32 JVM_CONSTANT_Invalid = 0, // For bad value initialization
duke@0 33 JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course)
duke@0 34 JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use
duke@0 35 JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool
duke@0 36 JVM_CONSTANT_UnresolvedString = 102, // Temporary tag until actual use
duke@0 37 JVM_CONSTANT_StringIndex = 103, // Temporary tag while constructing constant pool
duke@0 38 JVM_CONSTANT_UnresolvedClassInError = 104, // Error tag due to resolution error
twisti@1138 39 JVM_CONSTANT_Object = 105, // Required for BoundMethodHandle arguments.
twisti@1138 40 JVM_CONSTANT_InternalMax = 105 // Last implementation tag
duke@0 41 };
duke@0 42
duke@0 43
duke@0 44 class constantTag VALUE_OBJ_CLASS_SPEC {
duke@0 45 private:
duke@0 46 jbyte _tag;
duke@0 47 public:
duke@0 48 bool is_klass() const { return _tag == JVM_CONSTANT_Class; }
duke@0 49 bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; }
duke@0 50 bool is_method() const { return _tag == JVM_CONSTANT_Methodref; }
duke@0 51 bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; }
duke@0 52 bool is_string() const { return _tag == JVM_CONSTANT_String; }
duke@0 53 bool is_int() const { return _tag == JVM_CONSTANT_Integer; }
duke@0 54 bool is_float() const { return _tag == JVM_CONSTANT_Float; }
duke@0 55 bool is_long() const { return _tag == JVM_CONSTANT_Long; }
duke@0 56 bool is_double() const { return _tag == JVM_CONSTANT_Double; }
duke@0 57 bool is_name_and_type() const { return _tag == JVM_CONSTANT_NameAndType; }
duke@0 58 bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; }
duke@0 59
duke@0 60 bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; }
duke@0 61
duke@0 62 bool is_unresolved_klass() const {
duke@0 63 return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError;
duke@0 64 }
duke@0 65
duke@0 66 bool is_unresolved_klass_in_error() const {
duke@0 67 return _tag == JVM_CONSTANT_UnresolvedClassInError;
duke@0 68 }
duke@0 69
duke@0 70 bool is_klass_index() const { return _tag == JVM_CONSTANT_ClassIndex; }
duke@0 71 bool is_unresolved_string() const { return _tag == JVM_CONSTANT_UnresolvedString; }
duke@0 72 bool is_string_index() const { return _tag == JVM_CONSTANT_StringIndex; }
duke@0 73
twisti@1138 74 bool is_object() const { return _tag == JVM_CONSTANT_Object; }
twisti@1138 75
duke@0 76 bool is_klass_reference() const { return is_klass_index() || is_unresolved_klass(); }
jrose@431 77 bool is_klass_or_reference() const{ return is_klass() || is_klass_reference(); }
duke@0 78 bool is_field_or_method() const { return is_field() || is_method() || is_interface_method(); }
duke@0 79 bool is_symbol() const { return is_utf8(); }
duke@0 80
jrose@1524 81 bool is_method_type() const { return _tag == JVM_CONSTANT_MethodType; }
jrose@1524 82 bool is_method_handle() const { return _tag == JVM_CONSTANT_MethodHandle; }
jrose@1583 83 bool is_invoke_dynamic() const { return _tag == JVM_CONSTANT_InvokeDynamic; }
jrose@1524 84
jrose@1838 85 bool is_loadable_constant() const {
jrose@1838 86 return ((_tag >= JVM_CONSTANT_Integer && _tag <= JVM_CONSTANT_String) ||
jrose@1838 87 is_method_type() || is_method_handle() ||
jrose@1838 88 is_unresolved_klass() || is_unresolved_string() ||
jrose@1838 89 is_object());
jrose@1838 90 }
jrose@1838 91
jrose@1524 92 constantTag() {
jrose@1524 93 _tag = JVM_CONSTANT_Invalid;
jrose@1524 94 }
duke@0 95 constantTag(jbyte tag) {
duke@0 96 assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) ||
jrose@1583 97 (tag >= JVM_CONSTANT_MethodHandle && tag <= JVM_CONSTANT_InvokeDynamic) ||
duke@0 98 (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag");
duke@0 99 _tag = tag;
duke@0 100 }
duke@0 101
duke@0 102 jbyte value() { return _tag; }
duke@0 103
jrose@1524 104 BasicType basic_type() const; // if used with ldc, what kind of value gets pushed?
jrose@1524 105
jrose@1524 106 const char* internal_name() const; // for error reporting
jrose@1524 107
duke@0 108 void print_on(outputStream* st) const PRODUCT_RETURN;
duke@0 109 };