| /* |
| * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_UTILITIES_CONSTANTTAG_HPP |
| #define SHARE_VM_UTILITIES_CONSTANTTAG_HPP |
| |
| #include "memory/allocation.hpp" |
| #include "prims/jvm.h" |
| |
| // constant tags in Java .class files |
| |
| |
| enum { |
| // See jvm.h for shared JVM_CONSTANT_XXX tags |
| // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java |
| // Hotspot specific tags |
| JVM_CONSTANT_Invalid = 0, // For bad value initialization |
| JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course) |
| JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use |
| JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool |
| JVM_CONSTANT_StringIndex = 102, // Temporary tag while constructing constant pool |
| JVM_CONSTANT_UnresolvedClassInError = 103, // Error tag due to resolution error |
| JVM_CONSTANT_MethodHandleInError = 104, // Error tag due to resolution error |
| JVM_CONSTANT_MethodTypeInError = 105, // Error tag due to resolution error |
| JVM_CONSTANT_InternalMax = 105 // Last implementation tag |
| }; |
| |
| |
| class constantTag VALUE_OBJ_CLASS_SPEC { |
| private: |
| jbyte _tag; |
| public: |
| bool is_klass() const { return _tag == JVM_CONSTANT_Class; } |
| bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; } |
| bool is_method() const { return _tag == JVM_CONSTANT_Methodref; } |
| bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; } |
| bool is_string() const { return _tag == JVM_CONSTANT_String; } |
| bool is_int() const { return _tag == JVM_CONSTANT_Integer; } |
| bool is_float() const { return _tag == JVM_CONSTANT_Float; } |
| bool is_long() const { return _tag == JVM_CONSTANT_Long; } |
| bool is_double() const { return _tag == JVM_CONSTANT_Double; } |
| bool is_name_and_type() const { return _tag == JVM_CONSTANT_NameAndType; } |
| bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; } |
| |
| bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; } |
| |
| bool is_unresolved_klass() const { |
| return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError; |
| } |
| |
| bool is_unresolved_klass_in_error() const { |
| return _tag == JVM_CONSTANT_UnresolvedClassInError; |
| } |
| |
| bool is_method_handle_in_error() const { |
| return _tag == JVM_CONSTANT_MethodHandleInError; |
| } |
| bool is_method_type_in_error() const { |
| return _tag == JVM_CONSTANT_MethodTypeInError; |
| } |
| |
| bool is_klass_index() const { return _tag == JVM_CONSTANT_ClassIndex; } |
| bool is_string_index() const { return _tag == JVM_CONSTANT_StringIndex; } |
| |
| bool is_klass_reference() const { return is_klass_index() || is_unresolved_klass(); } |
| bool is_klass_or_reference() const{ return is_klass() || is_klass_reference(); } |
| bool is_field_or_method() const { return is_field() || is_method() || is_interface_method(); } |
| bool is_symbol() const { return is_utf8(); } |
| |
| bool is_method_type() const { return _tag == JVM_CONSTANT_MethodType; } |
| bool is_method_handle() const { return _tag == JVM_CONSTANT_MethodHandle; } |
| bool is_invoke_dynamic() const { return _tag == JVM_CONSTANT_InvokeDynamic; } |
| |
| bool is_loadable_constant() const { |
| return ((_tag >= JVM_CONSTANT_Integer && _tag <= JVM_CONSTANT_String) || |
| is_method_type() || is_method_handle() || |
| is_unresolved_klass()); |
| } |
| |
| constantTag() { |
| _tag = JVM_CONSTANT_Invalid; |
| } |
| constantTag(jbyte tag) { |
| assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) || |
| (tag >= JVM_CONSTANT_MethodHandle && tag <= JVM_CONSTANT_InvokeDynamic) || |
| (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag"); |
| _tag = tag; |
| } |
| |
| jbyte value() const { return _tag; } |
| jbyte error_value() const; |
| jbyte non_error_value() const; |
| |
| BasicType basic_type() const; // if used with ldc, what kind of value gets pushed? |
| |
| const char* internal_name() const; // for error reporting |
| |
| void print_on(outputStream* st) const PRODUCT_RETURN; |
| }; |
| |
| #endif // SHARE_VM_UTILITIES_CONSTANTTAG_HPP |