| /* |
| * Copyright (c) 1998, 2012, 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_OOPS_COMPILEDICHOLDEROOP_HPP |
| #define SHARE_VM_OOPS_COMPILEDICHOLDEROOP_HPP |
| |
| #include "oops/oop.hpp" |
| #include "utilities/macros.hpp" |
| |
| // A CompiledICHolder* is a helper object for the inline cache implementation. |
| // It holds an intermediate value (method+klass pair) used when converting from |
| // compiled to an interpreted call. |
| // |
| // These are always allocated in the C heap and are freed during a |
| // safepoint by the ICBuffer logic. It's unsafe to free them earlier |
| // since they might be in use. |
| // |
| |
| |
| class CompiledICHolder : public CHeapObj<mtCompiler> { |
| friend class VMStructs; |
| private: |
| static volatile int _live_count; // allocated |
| static volatile int _live_not_claimed_count; // allocated but not yet in use so not |
| // reachable by iterating over nmethods |
| |
| Method* _holder_method; |
| Klass* _holder_klass; // to avoid name conflict with oopDesc::_klass |
| CompiledICHolder* _next; |
| |
| public: |
| // Constructor |
| CompiledICHolder(Method* method, Klass* klass); |
| ~CompiledICHolder() NOT_DEBUG_RETURN; |
| |
| static int live_count() { return _live_count; } |
| static int live_not_claimed_count() { return _live_not_claimed_count; } |
| |
| // accessors |
| Method* holder_method() const { return _holder_method; } |
| Klass* holder_klass() const { return _holder_klass; } |
| |
| void set_holder_method(Method* m) { _holder_method = m; } |
| void set_holder_klass(Klass* k) { _holder_klass = k; } |
| |
| // interpreter support (offsets in bytes) |
| static int holder_method_offset() { return offset_of(CompiledICHolder, _holder_method); } |
| static int holder_klass_offset() { return offset_of(CompiledICHolder, _holder_klass); } |
| |
| CompiledICHolder* next() { return _next; } |
| void set_next(CompiledICHolder* n) { _next = n; } |
| |
| // Verify |
| void verify_on(outputStream* st); |
| |
| // Printing |
| void print_on(outputStream* st) const; |
| void print_value_on(outputStream* st) const; |
| |
| const char* internal_name() const { return "{compiledICHolder}"; } |
| |
| void claim() NOT_DEBUG_RETURN; |
| }; |
| |
| #endif // SHARE_VM_OOPS_COMPILEDICHOLDEROOP_HPP |