1 /* 2 * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_GC_SHARED_GCARGUMENTS_HPP 26 #define SHARE_GC_SHARED_GCARGUMENTS_HPP 27 28 #include "memory/allocation.hpp" 29 30 class CollectedHeap; 31 32 class GCArguments : public CHeapObj<mtGC> { 33 private: 34 static GCArguments* _instance; 35 36 static void select_gc(); 37 static void select_gc_ergonomically(); 38 static bool gc_selected(); 39 40 protected: 41 template <class Heap, class Policy> 42 CollectedHeap* create_heap_with_policy(); 43 44 public: 45 static jint initialize(); 46 static bool is_initialized(); 47 static GCArguments* arguments(); 48 49 void post_heap_initialize(); 50 51 virtual void initialize_flags(); 52 53 // Collector specific function to allow finer grained verification 54 // through VerifyGCType. If not overridden the default version will 55 // warn that the flag is not supported for the given collector. 56 // Returns true if parsing should continue, false otherwise. 57 virtual bool parse_verification_type(const char* type); 58 59 virtual size_t conservative_max_heap_alignment() = 0; 60 61 virtual CollectedHeap* create_heap() = 0; 62 }; 63 64 #endif // SHARE_GC_SHARED_GCARGUMENTS_HPP