Mercurial > hg > truffle
annotate src/share/vm/utilities/constantTag.hpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | dad31fc330cd |
| children | ed69575596ac |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_UTILITIES_CONSTANTTAG_HPP |
| 26 #define SHARE_VM_UTILITIES_CONSTANTTAG_HPP | |
| 27 | |
| 28 #include "prims/jvm.h" | |
| 29 #include "utilities/top.hpp" | |
| 30 | |
| 0 | 31 // constant tags in Java .class files |
| 32 | |
| 33 | |
| 34 enum { | |
| 35 // See jvm.h for shared JVM_CONSTANT_XXX tags | |
| 36 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java | |
| 37 // Hotspot specific tags | |
| 38 JVM_CONSTANT_Invalid = 0, // For bad value initialization | |
| 39 JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course) | |
| 40 JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use | |
| 41 JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool | |
| 42 JVM_CONSTANT_UnresolvedString = 102, // Temporary tag until actual use | |
| 43 JVM_CONSTANT_StringIndex = 103, // Temporary tag while constructing constant pool | |
| 44 JVM_CONSTANT_UnresolvedClassInError = 104, // Error tag due to resolution error | |
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45 JVM_CONSTANT_Object = 105, // Required for BoundMethodHandle arguments. |
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46 JVM_CONSTANT_InternalMax = 105 // Last implementation tag |
| 0 | 47 }; |
| 48 | |
| 49 | |
| 50 class constantTag VALUE_OBJ_CLASS_SPEC { | |
| 51 private: | |
| 52 jbyte _tag; | |
| 53 public: | |
| 54 bool is_klass() const { return _tag == JVM_CONSTANT_Class; } | |
| 55 bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; } | |
| 56 bool is_method() const { return _tag == JVM_CONSTANT_Methodref; } | |
| 57 bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; } | |
| 58 bool is_string() const { return _tag == JVM_CONSTANT_String; } | |
| 59 bool is_int() const { return _tag == JVM_CONSTANT_Integer; } | |
| 60 bool is_float() const { return _tag == JVM_CONSTANT_Float; } | |
| 61 bool is_long() const { return _tag == JVM_CONSTANT_Long; } | |
| 62 bool is_double() const { return _tag == JVM_CONSTANT_Double; } | |
| 63 bool is_name_and_type() const { return _tag == JVM_CONSTANT_NameAndType; } | |
| 64 bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; } | |
| 65 | |
| 66 bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; } | |
| 67 | |
| 68 bool is_unresolved_klass() const { | |
| 69 return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError; | |
| 70 } | |
| 71 | |
| 72 bool is_unresolved_klass_in_error() const { | |
| 73 return _tag == JVM_CONSTANT_UnresolvedClassInError; | |
| 74 } | |
| 75 | |
| 76 bool is_klass_index() const { return _tag == JVM_CONSTANT_ClassIndex; } | |
| 77 bool is_unresolved_string() const { return _tag == JVM_CONSTANT_UnresolvedString; } | |
| 78 bool is_string_index() const { return _tag == JVM_CONSTANT_StringIndex; } | |
| 79 | |
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80 bool is_object() const { return _tag == JVM_CONSTANT_Object; } |
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81 |
| 0 | 82 bool is_klass_reference() const { return is_klass_index() || is_unresolved_klass(); } |
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83 bool is_klass_or_reference() const{ return is_klass() || is_klass_reference(); } |
| 0 | 84 bool is_field_or_method() const { return is_field() || is_method() || is_interface_method(); } |
| 85 bool is_symbol() const { return is_utf8(); } | |
| 86 | |
| 1602 | 87 bool is_method_type() const { return _tag == JVM_CONSTANT_MethodType; } |
| 88 bool is_method_handle() const { return _tag == JVM_CONSTANT_MethodHandle; } | |
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89 bool is_invoke_dynamic() const { return (_tag == JVM_CONSTANT_InvokeDynamic || |
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90 _tag == JVM_CONSTANT_InvokeDynamicTrans); } |
| 1602 | 91 |
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92 bool is_loadable_constant() const { |
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93 return ((_tag >= JVM_CONSTANT_Integer && _tag <= JVM_CONSTANT_String) || |
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94 is_method_type() || is_method_handle() || |
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95 is_unresolved_klass() || is_unresolved_string() || |
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96 is_object()); |
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97 } |
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98 |
| 1602 | 99 constantTag() { |
| 100 _tag = JVM_CONSTANT_Invalid; | |
| 101 } | |
| 0 | 102 constantTag(jbyte tag) { |
| 103 assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) || | |
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104 (tag >= JVM_CONSTANT_MethodHandle && tag <= JVM_CONSTANT_InvokeDynamic) || |
| 0 | 105 (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag"); |
| 106 _tag = tag; | |
| 107 } | |
| 108 | |
| 109 jbyte value() { return _tag; } | |
| 110 | |
| 1602 | 111 BasicType basic_type() const; // if used with ldc, what kind of value gets pushed? |
| 112 | |
| 113 const char* internal_name() const; // for error reporting | |
| 114 | |
| 0 | 115 void print_on(outputStream* st) const PRODUCT_RETURN; |
| 116 }; | |
| 1972 | 117 |
| 118 #endif // SHARE_VM_UTILITIES_CONSTANTTAG_HPP |