| /* |
| * Copyright (c) 1997, 2013, 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 "classfile/systemDictionary.hpp" |
| #include "classfile/vmSymbols.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "memory/universe.inline.hpp" |
| #include "oops/annotations.hpp" |
| #include "oops/instanceKlass.hpp" |
| #include "oops/fieldStreams.hpp" |
| #include "runtime/fieldDescriptor.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/signature.hpp" |
| |
| |
| oop fieldDescriptor::loader() const { |
| return _cp->pool_holder()->class_loader(); |
| } |
| |
| Symbol* fieldDescriptor::generic_signature() const { |
| if (!has_generic_signature()) { |
| return NULL; |
| } |
| |
| int idx = 0; |
| InstanceKlass* ik = field_holder(); |
| for (AllFieldStream fs(ik); !fs.done(); fs.next()) { |
| if (idx == _index) { |
| return fs.generic_signature(); |
| } else { |
| idx ++; |
| } |
| } |
| assert(false, "should never happen"); |
| return NULL; |
| } |
| |
| AnnotationArray* fieldDescriptor::annotations() const { |
| InstanceKlass* ik = field_holder(); |
| Array<AnnotationArray*>* md = ik->fields_annotations(); |
| if (md == NULL) |
| return NULL; |
| return md->at(index()); |
| } |
| |
| AnnotationArray* fieldDescriptor::type_annotations() const { |
| InstanceKlass* ik = field_holder(); |
| Array<AnnotationArray*>* type_annos = ik->fields_type_annotations(); |
| if (type_annos == NULL) |
| return NULL; |
| return type_annos->at(index()); |
| } |
| |
| constantTag fieldDescriptor::initial_value_tag() const { |
| return constants()->tag_at(initial_value_index()); |
| } |
| |
| jint fieldDescriptor::int_initial_value() const { |
| return constants()->int_at(initial_value_index()); |
| } |
| |
| jlong fieldDescriptor::long_initial_value() const { |
| return constants()->long_at(initial_value_index()); |
| } |
| |
| jfloat fieldDescriptor::float_initial_value() const { |
| return constants()->float_at(initial_value_index()); |
| } |
| |
| jdouble fieldDescriptor::double_initial_value() const { |
| return constants()->double_at(initial_value_index()); |
| } |
| |
| oop fieldDescriptor::string_initial_value(TRAPS) const { |
| return constants()->uncached_string_at(initial_value_index(), CHECK_0); |
| } |
| |
| void fieldDescriptor::reinitialize(InstanceKlass* ik, int index) { |
| if (_cp.is_null() || field_holder() != ik) { |
| _cp = constantPoolHandle(Thread::current(), ik->constants()); |
| // _cp should now reference ik's constant pool; i.e., ik is now field_holder. |
| assert(field_holder() == ik, "must be already initialized to this class"); |
| } |
| FieldInfo* f = ik->field(index); |
| assert(!f->is_internal(), "regular Java fields only"); |
| |
| _access_flags = accessFlags_from(f->access_flags()); |
| guarantee(f->name_index() != 0 && f->signature_index() != 0, "bad constant pool index for fieldDescriptor"); |
| _index = index; |
| verify(); |
| } |
| |
| #ifndef PRODUCT |
| |
| void fieldDescriptor::verify() const { |
| if (_cp.is_null()) { |
| assert(_index == badInt, "constructor must be called"); // see constructor |
| } else { |
| assert(_index >= 0, "good index"); |
| assert(_index < field_holder()->java_fields_count(), "oob"); |
| } |
| } |
| |
| void fieldDescriptor::print_on(outputStream* st) const { |
| access_flags().print_on(st); |
| name()->print_value_on(st); |
| st->print(" "); |
| signature()->print_value_on(st); |
| st->print(" @%d ", offset()); |
| if (WizardMode && has_initial_value()) { |
| st->print("(initval "); |
| constantTag t = initial_value_tag(); |
| if (t.is_int()) { |
| st->print("int %d)", int_initial_value()); |
| } else if (t.is_long()){ |
| st->print_jlong(long_initial_value()); |
| } else if (t.is_float()){ |
| st->print("float %f)", float_initial_value()); |
| } else if (t.is_double()){ |
| st->print("double %lf)", double_initial_value()); |
| } |
| } |
| } |
| |
| void fieldDescriptor::print_on_for(outputStream* st, oop obj) { |
| print_on(st); |
| BasicType ft = field_type(); |
| jint as_int = 0; |
| switch (ft) { |
| case T_BYTE: |
| as_int = (jint)obj->byte_field(offset()); |
| st->print(" %d", obj->byte_field(offset())); |
| break; |
| case T_CHAR: |
| as_int = (jint)obj->char_field(offset()); |
| { |
| jchar c = obj->char_field(offset()); |
| as_int = c; |
| st->print(" %c %d", isprint(c) ? c : ' ', c); |
| } |
| break; |
| case T_DOUBLE: |
| st->print(" %lf", obj->double_field(offset())); |
| break; |
| case T_FLOAT: |
| as_int = obj->int_field(offset()); |
| st->print(" %f", obj->float_field(offset())); |
| break; |
| case T_INT: |
| as_int = obj->int_field(offset()); |
| st->print(" %d", obj->int_field(offset())); |
| break; |
| case T_LONG: |
| st->print(" "); |
| st->print_jlong(obj->long_field(offset())); |
| break; |
| case T_SHORT: |
| as_int = obj->short_field(offset()); |
| st->print(" %d", obj->short_field(offset())); |
| break; |
| case T_BOOLEAN: |
| as_int = obj->bool_field(offset()); |
| st->print(" %s", obj->bool_field(offset()) ? "true" : "false"); |
| break; |
| case T_ARRAY: |
| st->print(" "); |
| NOT_LP64(as_int = obj->int_field(offset())); |
| obj->obj_field(offset())->print_value_on(st); |
| break; |
| case T_OBJECT: |
| st->print(" "); |
| NOT_LP64(as_int = obj->int_field(offset())); |
| obj->obj_field(offset())->print_value_on(st); |
| break; |
| default: |
| ShouldNotReachHere(); |
| break; |
| } |
| // Print a hint as to the underlying integer representation. This can be wrong for |
| // pointers on an LP64 machine |
| if (ft == T_LONG || ft == T_DOUBLE LP64_ONLY(|| !is_java_primitive(ft)) ) { |
| st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint))); |
| } else if (as_int < 0 || as_int > 9) { |
| st->print(" (%x)", as_int); |
| } |
| } |
| |
| #endif /* PRODUCT */ |