author | coleenp |
Thu, 27 Jun 2019 11:40:18 -0400 | |
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permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#ifndef SHARE_CI_CIINSTANCEKLASS_HPP |
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#define SHARE_CI_CIINSTANCEKLASS_HPP |
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#include "ci/ciConstantPoolCache.hpp" |
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#include "ci/ciFlags.hpp" |
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#include "ci/ciKlass.hpp" |
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#include "ci/ciSymbol.hpp" |
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// ciInstanceKlass |
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// |
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// This class represents a Klass* in the HotSpot virtual machine |
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// whose Klass part is an InstanceKlass. It may or may not |
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// be loaded. |
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class ciInstanceKlass : public ciKlass { |
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CI_PACKAGE_ACCESS |
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friend class ciBytecodeStream; |
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friend class ciEnv; |
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friend class ciExceptionHandler; |
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friend class ciMethod; |
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friend class ciField; |
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private: |
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enum SubklassValue { subklass_unknown, subklass_false, subklass_true }; |
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jobject _loader; |
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jobject _protection_domain; |
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InstanceKlass::ClassState _init_state; // state of class |
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bool _is_shared; |
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bool _has_finalizer; |
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SubklassValue _has_subklass; |
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bool _has_nonstatic_fields; |
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bool _has_nonstatic_concrete_methods; |
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bool _is_unsafe_anonymous; |
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ciFlags _flags; |
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jint _nonstatic_field_size; |
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jint _nonstatic_oop_map_size; |
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// Lazy fields get filled in only upon request. |
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ciInstanceKlass* _super; |
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ciInstance* _java_mirror; |
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ciConstantPoolCache* _field_cache; // cached map index->field |
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GrowableArray<ciField*>* _nonstatic_fields; |
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int _has_injected_fields; // any non static injected fields? lazily initialized. |
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// The possible values of the _implementor fall into following three cases: |
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// NULL: no implementor. |
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// A ciInstanceKlass that's not itself: one implementor. |
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// Itself: more than one implementor. |
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ciInstanceKlass* _implementor; |
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void compute_injected_fields(); |
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bool compute_injected_fields_helper(); |
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protected: |
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ciInstanceKlass(Klass* k); |
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ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain); |
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InstanceKlass* get_instanceKlass() const { |
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return InstanceKlass::cast(get_Klass()); |
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} |
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oop loader(); |
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jobject loader_handle(); |
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oop protection_domain(); |
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jobject protection_domain_handle(); |
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const char* type_string() { return "ciInstanceKlass"; } |
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bool is_in_package_impl(const char* packagename, int len); |
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void print_impl(outputStream* st); |
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ciConstantPoolCache* field_cache(); |
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bool is_shared() { return _is_shared; } |
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void compute_shared_init_state(); |
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bool compute_shared_has_subklass(); |
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int compute_nonstatic_fields(); |
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GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields); |
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// Update the init_state for shared klasses |
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void update_if_shared(InstanceKlass::ClassState expected) { |
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if (_is_shared && _init_state != expected) { |
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if (is_loaded()) compute_shared_init_state(); |
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} |
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} |
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public: |
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// Has this klass been initialized? |
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bool is_initialized() { |
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update_if_shared(InstanceKlass::fully_initialized); |
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return _init_state == InstanceKlass::fully_initialized; |
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} |
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bool is_not_initialized() { |
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update_if_shared(InstanceKlass::fully_initialized); |
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return _init_state < InstanceKlass::being_initialized; |
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} |
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// Is this klass being initialized? |
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bool is_being_initialized() { |
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update_if_shared(InstanceKlass::being_initialized); |
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return _init_state == InstanceKlass::being_initialized; |
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} |
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// Has this klass been linked? |
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bool is_linked() { |
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update_if_shared(InstanceKlass::linked); |
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return _init_state >= InstanceKlass::linked; |
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} |
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// Is this klass in error state? |
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bool is_in_error_state() { |
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update_if_shared(InstanceKlass::initialization_error); |
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return _init_state == InstanceKlass::initialization_error; |
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} |
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// General klass information. |
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ciFlags flags() { |
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assert(is_loaded(), "must be loaded"); |
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return _flags; |
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} |
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bool has_finalizer() { |
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assert(is_loaded(), "must be loaded"); |
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return _has_finalizer; } |
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bool has_subklass() { |
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assert(is_loaded(), "must be loaded"); |
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if (_has_subklass == subklass_unknown || |
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(_is_shared && _has_subklass == subklass_false)) { |
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if (flags().is_final()) { |
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return false; |
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} else { |
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return compute_shared_has_subklass(); |
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} |
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} |
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return _has_subklass == subklass_true; |
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} |
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jint size_helper() { |
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return (Klass::layout_helper_size_in_bytes(layout_helper()) |
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>> LogHeapWordSize); |
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} |
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jint nonstatic_field_size() { |
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assert(is_loaded(), "must be loaded"); |
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return _nonstatic_field_size; } |
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jint has_nonstatic_fields() { |
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assert(is_loaded(), "must be loaded"); |
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return _has_nonstatic_fields; } |
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jint nonstatic_oop_map_size() { |
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assert(is_loaded(), "must be loaded"); |
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return _nonstatic_oop_map_size; } |
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ciInstanceKlass* super(); |
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jint nof_implementors() { |
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ciInstanceKlass* impl; |
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assert(is_loaded(), "must be loaded"); |
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impl = implementor(); |
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if (impl == NULL) { |
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return 0; |
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} else if (impl != this) { |
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return 1; |
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} else { |
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return 2; |
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} |
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} |
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bool has_nonstatic_concrete_methods() { |
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assert(is_loaded(), "must be loaded"); |
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return _has_nonstatic_concrete_methods; |
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} |
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bool is_unsafe_anonymous() { |
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return _is_unsafe_anonymous; |
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} |
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ciInstanceKlass* get_canonical_holder(int offset); |
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ciField* get_field_by_offset(int field_offset, bool is_static); |
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ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static); |
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// total number of nonstatic fields (including inherited): |
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int nof_nonstatic_fields() { |
|
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if (_nonstatic_fields == NULL) |
|
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return compute_nonstatic_fields(); |
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else |
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return _nonstatic_fields->length(); |
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} |
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bool has_injected_fields() { |
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if (_has_injected_fields == -1) { |
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compute_injected_fields(); |
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} |
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return _has_injected_fields > 0 ? true : false; |
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} |
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bool has_object_fields() const; |
218 |
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// nth nonstatic field (presented by ascending address) |
220 |
ciField* nonstatic_field_at(int i) { |
|
221 |
assert(_nonstatic_fields != NULL, ""); |
|
222 |
return _nonstatic_fields->at(i); |
|
223 |
} |
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224 |
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225 |
ciInstanceKlass* unique_concrete_subklass(); |
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bool has_finalizable_subclass(); |
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227 |
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bool contains_field_offset(int offset) { |
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return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
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} |
231 |
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// Get the instance of java.lang.Class corresponding to |
|
233 |
// this klass. This instance is used for locking of |
|
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// synchronized static methods of this klass. |
|
235 |
ciInstance* java_mirror(); |
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236 |
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237 |
// Java access flags |
|
238 |
bool is_public () { return flags().is_public(); } |
|
239 |
bool is_final () { return flags().is_final(); } |
|
240 |
bool is_super () { return flags().is_super(); } |
|
241 |
bool is_interface () { return flags().is_interface(); } |
|
242 |
bool is_abstract () { return flags().is_abstract(); } |
|
243 |
||
244 |
ciMethod* find_method(ciSymbol* name, ciSymbol* signature); |
|
245 |
// Note: To find a method from name and type strings, use ciSymbol::make, |
|
246 |
// but consider adding to vmSymbols.hpp instead. |
|
247 |
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bool is_leaf_type(); |
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ciInstanceKlass* implementor(); |
1 | 250 |
|
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// Is the defining class loader of this class the default loader? |
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bool uses_default_loader() const; |
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bool is_java_lang_Object() const; |
1 | 255 |
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BasicType box_klass_type() const; |
257 |
bool is_box_klass() const; |
|
258 |
bool is_boxed_value_offset(int offset) const; |
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// Is this klass in the given package? |
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bool is_in_package(const char* packagename) { |
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return is_in_package(packagename, (int) strlen(packagename)); |
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} |
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bool is_in_package(const char* packagename, int len); |
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1 | 266 |
// What kind of ciObject is this? |
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bool is_instance_klass() const { return true; } |
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bool is_java_klass() const { return true; } |
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virtual ciKlass* exact_klass() { |
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if (is_loaded() && is_final() && !is_interface()) { |
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return this; |
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} |
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return NULL; |
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} |
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|
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ciInstanceKlass* unsafe_anonymous_host(); |
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bool can_be_instantiated() { |
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assert(is_loaded(), "must be loaded"); |
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return !is_interface() && !is_abstract(); |
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} |
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// Dump the current state of this klass for compilation replay. |
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virtual void dump_replay_data(outputStream* out); |
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|
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#ifdef ASSERT |
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bool debug_final_field_at(int offset); |
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bool debug_stable_field_at(int offset); |
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#endif |
1 | 291 |
}; |
7397 | 292 |
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#endif // SHARE_CI_CIINSTANCEKLASS_HPP |