1/* 2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. 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#include "precompiled.hpp" 26#include "gc/shared/gcId.hpp" 27#include "runtime/safepoint.hpp" 28#include "runtime/thread.inline.hpp" 29 30uint GCId::_next_id = 0; 31 32NamedThread* currentNamedthread() { 33 assert(Thread::current()->is_Named_thread(), "This thread must be NamedThread"); 34 return (NamedThread*)Thread::current(); 35} 36 37const uint GCId::create() { 38 return _next_id++; 39} 40 41const uint GCId::peek() { 42 return _next_id; 43} 44 45const uint GCId::current() { 46 assert(currentNamedthread()->gc_id() != undefined(), "Using undefined GC id."); 47 return current_raw(); 48} 49 50const uint GCId::current_raw() { 51 return currentNamedthread()->gc_id(); 52} 53 54size_t GCId::print_prefix(char* buf, size_t len) { 55 Thread* thread = Thread::current_or_null(); 56 if (thread != NULL && thread->is_Named_thread()) { 57 uint gc_id = current_raw(); 58 if (gc_id != undefined()) { 59 int ret = jio_snprintf(buf, len, "GC(%u) ", gc_id); 60 assert(ret > 0, "Failed to print prefix. Log buffer too small?"); 61 return (size_t)ret; 62 } 63 } 64 return 0; 65} 66 67GCIdMark::GCIdMark() : _gc_id(GCId::create()) { 68 currentNamedthread()->set_gc_id(_gc_id); 69} 70 71GCIdMark::GCIdMark(uint gc_id) : _gc_id(gc_id) { 72 currentNamedthread()->set_gc_id(_gc_id); 73} 74 75GCIdMark::~GCIdMark() { 76 currentNamedthread()->set_gc_id(GCId::undefined()); 77} 78 79GCIdMarkAndRestore::GCIdMarkAndRestore() : _gc_id(GCId::create()) { 80 _previous_gc_id = GCId::current_raw(); 81 currentNamedthread()->set_gc_id(_gc_id); 82} 83 84GCIdMarkAndRestore::GCIdMarkAndRestore(uint gc_id) : _gc_id(gc_id) { 85 _previous_gc_id = GCId::current_raw(); 86 currentNamedthread()->set_gc_id(_gc_id); 87} 88 89GCIdMarkAndRestore::~GCIdMarkAndRestore() { 90 currentNamedthread()->set_gc_id(_previous_gc_id); 91} 92