| /* |
| * Copyright (c) 1999, 2017, 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_CI_CIINSTANCEKLASS_HPP |
| #define SHARE_VM_CI_CIINSTANCEKLASS_HPP |
| |
| #include "ci/ciConstantPoolCache.hpp" |
| #include "ci/ciFlags.hpp" |
| #include "ci/ciKlass.hpp" |
| #include "ci/ciSymbol.hpp" |
| |
| // ciInstanceKlass |
| // |
| // This class represents a Klass* in the HotSpot virtual machine |
| // whose Klass part is an InstanceKlass. It may or may not |
| // be loaded. |
| class ciInstanceKlass : public ciKlass { |
| CI_PACKAGE_ACCESS |
| friend class ciBytecodeStream; |
| friend class ciEnv; |
| friend class ciExceptionHandler; |
| friend class ciMethod; |
| friend class ciField; |
| |
| private: |
| jobject _loader; |
| jobject _protection_domain; |
| |
| InstanceKlass::ClassState _init_state; // state of class |
| bool _is_shared; |
| bool _has_finalizer; |
| bool _has_subklass; |
| bool _has_nonstatic_fields; |
| bool _has_nonstatic_concrete_methods; |
| bool _is_anonymous; |
| |
| ciFlags _flags; |
| jint _nonstatic_field_size; |
| jint _nonstatic_oop_map_size; |
| |
| // Lazy fields get filled in only upon request. |
| ciInstanceKlass* _super; |
| ciInstance* _java_mirror; |
| |
| ciConstantPoolCache* _field_cache; // cached map index->field |
| GrowableArray<ciField*>* _nonstatic_fields; |
| int _has_injected_fields; // any non static injected fields? lazily initialized. |
| |
| // The possible values of the _implementor fall into following three cases: |
| // NULL: no implementor. |
| // A ciInstanceKlass that's not itself: one implementor. |
| // Itsef: more than one implementors. |
| ciInstanceKlass* _implementor; |
| |
| void compute_injected_fields(); |
| bool compute_injected_fields_helper(); |
| |
| protected: |
| ciInstanceKlass(Klass* k); |
| ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain); |
| |
| InstanceKlass* get_instanceKlass() const { |
| return InstanceKlass::cast(get_Klass()); |
| } |
| |
| oop loader(); |
| jobject loader_handle(); |
| |
| oop protection_domain(); |
| jobject protection_domain_handle(); |
| |
| const char* type_string() { return "ciInstanceKlass"; } |
| |
| bool is_in_package_impl(const char* packagename, int len); |
| |
| void print_impl(outputStream* st); |
| |
| ciConstantPoolCache* field_cache(); |
| |
| bool is_shared() { return _is_shared; } |
| |
| void compute_shared_init_state(); |
| bool compute_shared_has_subklass(); |
| int compute_nonstatic_fields(); |
| GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields); |
| |
| // Update the init_state for shared klasses |
| void update_if_shared(InstanceKlass::ClassState expected) { |
| if (_is_shared && _init_state != expected) { |
| if (is_loaded()) compute_shared_init_state(); |
| } |
| } |
| |
| public: |
| // Has this klass been initialized? |
| bool is_initialized() { |
| update_if_shared(InstanceKlass::fully_initialized); |
| return _init_state == InstanceKlass::fully_initialized; |
| } |
| // Is this klass being initialized? |
| bool is_being_initialized() { |
| update_if_shared(InstanceKlass::being_initialized); |
| return _init_state == InstanceKlass::being_initialized; |
| } |
| // Has this klass been linked? |
| bool is_linked() { |
| update_if_shared(InstanceKlass::linked); |
| return _init_state >= InstanceKlass::linked; |
| } |
| |
| // General klass information. |
| ciFlags flags() { |
| assert(is_loaded(), "must be loaded"); |
| return _flags; |
| } |
| bool has_finalizer() { |
| assert(is_loaded(), "must be loaded"); |
| return _has_finalizer; } |
| bool has_subklass() { |
| assert(is_loaded(), "must be loaded"); |
| if (_is_shared && !_has_subklass) { |
| if (flags().is_final()) { |
| return false; |
| } else { |
| return compute_shared_has_subklass(); |
| } |
| } |
| return _has_subklass; |
| } |
| jint size_helper() { |
| return (Klass::layout_helper_size_in_bytes(layout_helper()) |
| >> LogHeapWordSize); |
| } |
| jint nonstatic_field_size() { |
| assert(is_loaded(), "must be loaded"); |
| return _nonstatic_field_size; } |
| jint has_nonstatic_fields() { |
| assert(is_loaded(), "must be loaded"); |
| return _has_nonstatic_fields; } |
| jint nonstatic_oop_map_size() { |
| assert(is_loaded(), "must be loaded"); |
| return _nonstatic_oop_map_size; } |
| ciInstanceKlass* super(); |
| jint nof_implementors() { |
| ciInstanceKlass* impl; |
| assert(is_loaded(), "must be loaded"); |
| impl = implementor(); |
| if (impl == NULL) { |
| return 0; |
| } else if (impl != this) { |
| return 1; |
| } else { |
| return 2; |
| } |
| } |
| bool has_nonstatic_concrete_methods() { |
| assert(is_loaded(), "must be loaded"); |
| return _has_nonstatic_concrete_methods; |
| } |
| |
| bool is_anonymous() { |
| return _is_anonymous; |
| } |
| |
| ciInstanceKlass* get_canonical_holder(int offset); |
| ciField* get_field_by_offset(int field_offset, bool is_static); |
| ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static); |
| |
| // total number of nonstatic fields (including inherited): |
| int nof_nonstatic_fields() { |
| if (_nonstatic_fields == NULL) |
| return compute_nonstatic_fields(); |
| else |
| return _nonstatic_fields->length(); |
| } |
| |
| bool has_injected_fields() { |
| if (_has_injected_fields == -1) { |
| compute_injected_fields(); |
| } |
| return _has_injected_fields > 0 ? true : false; |
| } |
| |
| // nth nonstatic field (presented by ascending address) |
| ciField* nonstatic_field_at(int i) { |
| assert(_nonstatic_fields != NULL, ""); |
| return _nonstatic_fields->at(i); |
| } |
| |
| ciInstanceKlass* unique_concrete_subklass(); |
| bool has_finalizable_subclass(); |
| |
| bool contains_field_offset(int offset) { |
| return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
| } |
| |
| // Get the instance of java.lang.Class corresponding to |
| // this klass. This instance is used for locking of |
| // synchronized static methods of this klass. |
| ciInstance* java_mirror(); |
| |
| // Java access flags |
| bool is_public () { return flags().is_public(); } |
| bool is_final () { return flags().is_final(); } |
| bool is_super () { return flags().is_super(); } |
| bool is_interface () { return flags().is_interface(); } |
| bool is_abstract () { return flags().is_abstract(); } |
| |
| ciMethod* find_method(ciSymbol* name, ciSymbol* signature); |
| // Note: To find a method from name and type strings, use ciSymbol::make, |
| // but consider adding to vmSymbols.hpp instead. |
| |
| bool is_leaf_type(); |
| ciInstanceKlass* implementor(); |
| |
| // Is the defining class loader of this class the default loader? |
| bool uses_default_loader() const; |
| |
| bool is_java_lang_Object() const; |
| |
| BasicType box_klass_type() const; |
| bool is_box_klass() const; |
| bool is_boxed_value_offset(int offset) const; |
| |
| // Is this klass in the given package? |
| bool is_in_package(const char* packagename) { |
| return is_in_package(packagename, (int) strlen(packagename)); |
| } |
| bool is_in_package(const char* packagename, int len); |
| |
| // What kind of ciObject is this? |
| bool is_instance_klass() const { return true; } |
| bool is_java_klass() const { return true; } |
| |
| virtual ciKlass* exact_klass() { |
| if (is_loaded() && is_final() && !is_interface()) { |
| return this; |
| } |
| return NULL; |
| } |
| |
| ciInstanceKlass* host_klass(); |
| |
| bool can_be_instantiated() { |
| assert(is_loaded(), "must be loaded"); |
| return !is_interface() && !is_abstract(); |
| } |
| |
| // Dump the current state of this klass for compilation replay. |
| virtual void dump_replay_data(outputStream* out); |
| }; |
| |
| #endif // SHARE_VM_CI_CIINSTANCEKLASS_HPP |