6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
/*
* Copyright (c) 1997, 2012, 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.
*
*/
#include "precompiled.hpp"
#include "utilities/constantTag.hpp"
#ifndef PRODUCT
void constantTag::print_on(outputStream* st) const {
st->print(internal_name());
}
#endif // PRODUCT
BasicType constantTag::basic_type() const {
switch (_tag) {
case JVM_CONSTANT_Integer :
return T_INT;
case JVM_CONSTANT_Float :
return T_FLOAT;
case JVM_CONSTANT_Long :
return T_LONG;
case JVM_CONSTANT_Double :
return T_DOUBLE;
case JVM_CONSTANT_Class :
case JVM_CONSTANT_String :
case JVM_CONSTANT_UnresolvedClass :
case JVM_CONSTANT_UnresolvedClassInError :
case JVM_CONSTANT_ClassIndex :
case JVM_CONSTANT_StringIndex :
case JVM_CONSTANT_MethodHandle :
case JVM_CONSTANT_MethodType :
case JVM_CONSTANT_Object :
return T_OBJECT;
default:
ShouldNotReachHere();
return T_ILLEGAL;
}
}
const char* constantTag::internal_name() const {
switch (_tag) {
case JVM_CONSTANT_Invalid :
return "Invalid index";
case JVM_CONSTANT_Class :
return "Class";
case JVM_CONSTANT_Fieldref :
return "Field";
case JVM_CONSTANT_Methodref :
return "Method";
case JVM_CONSTANT_InterfaceMethodref :
return "InterfaceMethod";
case JVM_CONSTANT_String :
return "String";
case JVM_CONSTANT_Integer :
return "Integer";
case JVM_CONSTANT_Float :
return "Float";
case JVM_CONSTANT_Long :
return "Long";
case JVM_CONSTANT_Double :
return "Double";
case JVM_CONSTANT_NameAndType :
return "NameAndType";
case JVM_CONSTANT_MethodHandle :
return "MethodHandle";
case JVM_CONSTANT_MethodHandleInError :
return "MethodHandle Error";
case JVM_CONSTANT_MethodType :
return "MethodType";
case JVM_CONSTANT_MethodTypeInError :
return "MethodType Error";
case JVM_CONSTANT_InvokeDynamic :
return "InvokeDynamic";
case JVM_CONSTANT_Object :
return "Object";
case JVM_CONSTANT_Utf8 :
return "Utf8";
case JVM_CONSTANT_UnresolvedClass :
return "Unresolved Class";
case JVM_CONSTANT_UnresolvedClassInError :
return "Unresolved Class Error";
case JVM_CONSTANT_ClassIndex :
return "Unresolved Class Index";
case JVM_CONSTANT_StringIndex :
return "Unresolved String Index";
default:
ShouldNotReachHere();
return "Illegal";
}
}