| /* |
| * Copyright (c) 2014, 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. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "gc/shared/gcId.hpp" |
| #include "prims/jvm.h" |
| #include "runtime/safepoint.hpp" |
| #include "runtime/thread.inline.hpp" |
| |
| uint GCId::_next_id = 0; |
| |
| NamedThread* currentNamedthread() { |
| assert(Thread::current()->is_Named_thread(), "This thread must be NamedThread"); |
| return (NamedThread*)Thread::current(); |
| } |
| |
| const uint GCId::create() { |
| return _next_id++; |
| } |
| |
| const uint GCId::peek() { |
| return _next_id; |
| } |
| |
| const uint GCId::current() { |
| assert(currentNamedthread()->gc_id() != undefined(), "Using undefined GC id."); |
| return current_raw(); |
| } |
| |
| const uint GCId::current_raw() { |
| return currentNamedthread()->gc_id(); |
| } |
| |
| size_t GCId::print_prefix(char* buf, size_t len) { |
| Thread* thread = Thread::current_or_null(); |
| if (thread != NULL && thread->is_Named_thread()) { |
| uint gc_id = current_raw(); |
| if (gc_id != undefined()) { |
| int ret = jio_snprintf(buf, len, "GC(%u) ", gc_id); |
| assert(ret > 0, "Failed to print prefix. Log buffer too small?"); |
| return (size_t)ret; |
| } |
| } |
| return 0; |
| } |
| |
| GCIdMark::GCIdMark() : _gc_id(GCId::create()) { |
| currentNamedthread()->set_gc_id(_gc_id); |
| } |
| |
| GCIdMark::GCIdMark(uint gc_id) : _gc_id(gc_id) { |
| currentNamedthread()->set_gc_id(_gc_id); |
| } |
| |
| GCIdMark::~GCIdMark() { |
| currentNamedthread()->set_gc_id(GCId::undefined()); |
| } |
| |
| GCIdMarkAndRestore::GCIdMarkAndRestore() : _gc_id(GCId::create()) { |
| _previous_gc_id = GCId::current_raw(); |
| currentNamedthread()->set_gc_id(_gc_id); |
| } |
| |
| GCIdMarkAndRestore::GCIdMarkAndRestore(uint gc_id) : _gc_id(gc_id) { |
| _previous_gc_id = GCId::current_raw(); |
| currentNamedthread()->set_gc_id(_gc_id); |
| } |
| |
| GCIdMarkAndRestore::~GCIdMarkAndRestore() { |
| currentNamedthread()->set_gc_id(_previous_gc_id); |
| } |