/*
* Copyright ( c ) 2014 , 2021 , 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 "jvm.h"
#include "runtime/javaThread.hpp"
#include "runtime/nonJavaThread.hpp"
#include "runtime/safepoint.hpp"
uint GCId::_next_id = 0 ;
NamedThread* currentNamedthread() {
assert(Thread::current()->is_Named_thread(), "This thread must be NamedThread" );
return (NamedThread*)Thread::current();
}
uint GCId::create() {
return _next_id++;
}
uint GCId::peek() {
return _next_id;
}
uint GCId::current() {
const uint gc_id = currentNamedthread()->gc_id();
assert(gc_id != undefined(), "Using undefined GC id." );
return gc_id;
}
uint GCId::current_or_undefined() {
return Thread::current()->is_Named_thread() ? currentNamedthread()->gc_id() : undefined();
}
size_t GCId::print_prefix(char * buf, size_t len) {
Thread* thread = Thread::current_or_null();
if (thread != NULL) {
uint gc_id = current_or_undefined();
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() {
assert(currentNamedthread()->gc_id() == GCId::undefined(), "nested" );
currentNamedthread()->set_gc_id(GCId::create());
}
GCIdMark::GCIdMark(uint gc_id) {
assert(currentNamedthread()->gc_id() == GCId::undefined(), "nested" );
currentNamedthread()->set_gc_id(gc_id);
}
GCIdMark::~GCIdMark() {
currentNamedthread()->set_gc_id(GCId::undefined());
}
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