Mercurial > hg > graal-compiler
view src/share/vm/ci/ciObjectFactory.hpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
author | tonyp |
---|---|
date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | f95d63e2154a |
children | 06f017f7daa7 3582bf76420e |
line wrap: on
line source
/* * Copyright (c) 1999, 2010, 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_CIOBJECTFACTORY_HPP #define SHARE_VM_CI_CIOBJECTFACTORY_HPP #include "ci/ciClassList.hpp" #include "ci/ciObject.hpp" #include "utilities/growableArray.hpp" // ciObjectFactory // // This class handles requests for the creation of new instances // of ciObject and its subclasses. It contains a caching mechanism // which ensures that for each oop, at most one ciObject is created. // This invariant allows efficient implementation of ciObject. class ciObjectFactory : public ResourceObj { private: static volatile bool _initialized; static GrowableArray<ciObject*>* _shared_ci_objects; static ciSymbol* _shared_ci_symbols[]; static int _shared_ident_limit; Arena* _arena; GrowableArray<ciObject*>* _ci_objects; GrowableArray<ciMethod*>* _unloaded_methods; GrowableArray<ciKlass*>* _unloaded_klasses; GrowableArray<ciInstance*>* _unloaded_instances; GrowableArray<ciReturnAddress*>* _return_addresses; int _next_ident; public: struct NonPermObject : public ResourceObj { ciObject* _object; NonPermObject* _next; inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object); ciObject* object() { return _object; } NonPermObject* &next() { return _next; } }; private: enum { NON_PERM_BUCKETS = 61 }; NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS]; int _non_perm_count; int find(oop key, GrowableArray<ciObject*>* objects); bool is_found_at(int index, oop key, GrowableArray<ciObject*>* objects); void insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects); ciObject* create_new_object(oop o); static bool is_equal(NonPermObject* p, oop key) { return p->object()->get_oop() == key; } NonPermObject* &find_non_perm(oop key); void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj); void init_ident_of(ciObject* obj); Arena* arena() { return _arena; } void print_contents_impl(); ciInstance* get_unloaded_instance(ciInstanceKlass* klass); public: static bool is_initialized() { return _initialized; } static void initialize(); void init_shared_objects(); ciObjectFactory(Arena* arena, int expected_size); // Get the ciObject corresponding to some oop. ciObject* get(oop key); // Get the ciSymbol corresponding to one of the vmSymbols. static ciSymbol* vm_symbol_at(int index); // Get the ciMethod representing an unloaded/unfound method. ciMethod* get_unloaded_method(ciInstanceKlass* holder, ciSymbol* name, ciSymbol* signature); // Get a ciKlass representing an unloaded klass. ciKlass* get_unloaded_klass(ciKlass* accessing_klass, ciSymbol* name, bool create_if_not_found); // Get a ciInstance representing an unresolved klass mirror. ciInstance* get_unloaded_klass_mirror(ciKlass* type); // Get a ciInstance representing an unresolved method handle constant. ciInstance* get_unloaded_method_handle_constant(ciKlass* holder, ciSymbol* name, ciSymbol* signature, int ref_kind); // Get a ciInstance representing an unresolved method type constant. ciInstance* get_unloaded_method_type_constant(ciSymbol* signature); // Get the ciMethodData representing the methodData for a method // with none. ciMethodData* get_empty_methodData(); ciReturnAddress* get_return_address(int bci); void print_contents(); void print(); }; #endif // SHARE_VM_CI_CIOBJECTFACTORY_HPP