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/*
* Copyright (c) 1999, 2005, 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 "incls/_precompiled.incl"
#include "incls/_ciInstance.cpp.incl"
// ciInstance
//
// This class represents an instanceOop in the HotSpot virtual
// machine.
// ------------------------------------------------------------------
// ciObject::java_mirror_type
ciType* ciInstance::java_mirror_type() {
VM_ENTRY_MARK;
oop m = get_oop();
// Return NULL if it is not java.lang.Class.
if (m == NULL || m->klass() != SystemDictionary::Class_klass()) {
return NULL;
}
// Return either a primitive type or a klass.
if (java_lang_Class::is_primitive(m)) {
return ciType::make(java_lang_Class::primitive_type(m));
} else {
klassOop k = java_lang_Class::as_klassOop(m);
assert(k != NULL, "");
return CURRENT_THREAD_ENV->get_object(k)->as_klass();
}
}
// ------------------------------------------------------------------
// ciInstance::field_value
//
// Constant value of a field.
ciConstant ciInstance::field_value(ciField* field) {
assert(is_loaded() &&
field->holder()->is_loaded() &&
klass()->is_subclass_of(field->holder()),
"invalid access");
VM_ENTRY_MARK;
ciConstant result;
oop obj = get_oop();
assert(obj != NULL, "bad oop");
BasicType field_btype = field->type()->basic_type();
int offset = field->offset();
switch(field_btype) {
case T_BYTE:
return ciConstant(field_btype, obj->byte_field(offset));
break;
case T_CHAR:
return ciConstant(field_btype, obj->char_field(offset));
break;
case T_SHORT:
return ciConstant(field_btype, obj->short_field(offset));
break;
case T_BOOLEAN:
return ciConstant(field_btype, obj->bool_field(offset));
break;
case T_INT:
return ciConstant(field_btype, obj->int_field(offset));
break;
case T_FLOAT:
return ciConstant(obj->float_field(offset));
break;
case T_DOUBLE:
return ciConstant(obj->double_field(offset));
break;
case T_LONG:
return ciConstant(obj->long_field(offset));
break;
case T_OBJECT:
case T_ARRAY:
{
oop o = obj->obj_field(offset);
// A field will be "constant" if it is known always to be
// a non-null reference to an instance of a particular class,
// or to a particular array. This can happen even if the instance
// or array is not perm. In such a case, an "unloaded" ciArray
// or ciInstance is created. The compiler may be able to use
// information about the object's class (which is exact) or length.
if (o == NULL) {
return ciConstant(field_btype, ciNullObject::make());
} else {
return ciConstant(field_btype, CURRENT_ENV->get_object(o));
}
}
}
ShouldNotReachHere();
// to shut up the compiler
return ciConstant();
}
// ------------------------------------------------------------------
// ciInstance::field_value_by_offset
//
// Constant value of a field at the specified offset.
ciConstant ciInstance::field_value_by_offset(int field_offset) {
ciInstanceKlass* ik = klass()->as_instance_klass();
ciField* field = ik->get_field_by_offset(field_offset, false);
return field_value(field);
}
// ------------------------------------------------------------------
// ciInstance::print_impl
//
// Implementation of the print method.
void ciInstance::print_impl(outputStream* st) {
st->print(" type=");
klass()->print(st);
}
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