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/*
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "jfr/jni/jfrJavaSupport.hpp"
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#include "jfr/utilities/jfrJavaLog.hpp"
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#include "jfr/utilities/jfrLogTagSets.hpp"
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#include "logging/log.hpp"
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#include "logging/logConfiguration.hpp"
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#include "memory/resourceArea.hpp"
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#include "runtime/thread.inline.hpp"
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#define JFR_LOG_TAGS_CONCATED(T0, T1, T2, T3, T4, T5, ...) \
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T0 ## _ ## T1 ## _ ## T2 ## _ ## T3 ## _ ## T4 ## _ ## T5
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enum JfrLogTagSetType {
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#define JFR_LOG_TAG(...) \
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EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)),
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JFR_LOG_TAG_SET_LIST
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#undef JFR_LOG_TAG
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JFR_LOG_TAG_SET_COUNT
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};
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struct jfrLogSubscriber
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{
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jobject log_tag_enum_ref;
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LogTagSet* log_tag_set;
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};
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static jfrLogSubscriber log_tag_sets[JFR_LOG_TAG_SET_COUNT];
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static void log_cfg_update(LogLevelType llt, JfrLogTagSetType jflt, TRAPS) {
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DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
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if (log_tag_sets[jflt].log_tag_enum_ref == NULL) {
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return;
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}
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jobject lt = log_tag_sets[jflt].log_tag_enum_ref;
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// set field tagSetLevel to llt value
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JavaValue result(T_VOID);
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JfrJavaArguments args(&result);
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args.set_klass(JfrJavaSupport::klass(lt));
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args.set_name("tagSetLevel", CHECK);
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args.set_signature("I", CHECK);
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args.set_receiver(JfrJavaSupport::resolve_non_null(lt));
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args.push_int(llt);
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JfrJavaSupport::set_field(&args, THREAD);
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}
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static LogLevelType highest_level(const LogTagSet& lts) {
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for (size_t i = 0; i < LogLevel::Count; i++) {
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if (lts.is_level((LogLevelType)i)) {
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return (LogLevelType)i;
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}
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}
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return LogLevel::Off;
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}
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static void log_config_change_internal(bool init, TRAPS) {
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LogLevelType llt;
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LogTagSet* lts;
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#define JFR_LOG_TAG(...) \
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lts = &LogTagSetMapping<LOG_TAGS(__VA_ARGS__)>::tagset(); \
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if (init) { \
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JfrLogTagSetType tagSetType = \
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EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)); \
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assert(NULL == log_tag_sets[tagSetType].log_tag_set, "Init JFR LogTagSets twice"); \
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log_tag_sets[tagSetType].log_tag_set = lts; \
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} \
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llt = highest_level(*lts); \
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log_cfg_update(llt, \
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EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)), THREAD);
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JFR_LOG_TAG_SET_LIST
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#undef JFR_LOG_TAG
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}
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static void log_config_change() {
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Thread* t = Thread::current();
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DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(t));
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log_config_change_internal(false, t);
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}
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void JfrJavaLog::subscribe_log_level(jobject log_tag, jint id, TRAPS) {
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DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
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static bool subscribed_updates = true;
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assert(id < JFR_LOG_TAG_SET_COUNT,
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"LogTag id, java and native not in synch, %d < %d", id, JFR_LOG_TAG_SET_COUNT);
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assert(NULL == log_tag_sets[id].log_tag_enum_ref, "Subscribing twice");
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log_tag_sets[id].log_tag_enum_ref = JfrJavaSupport::global_jni_handle(log_tag, THREAD);
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if (subscribed_updates) {
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LogConfiguration::register_update_listener(&log_config_change);
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log_config_change_internal(true, THREAD);
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subscribed_updates = false;
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} else {
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log_config_change_internal(false, THREAD);
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}
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}
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void JfrJavaLog::log(jint tag_set, jint level, jstring message, TRAPS) {
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DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
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if (message == NULL) {
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return;
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}
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if (level < (jint)LogLevel::First || level > (jint)LogLevel::Last) {
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JfrJavaSupport::throw_illegal_argument_exception("LogLevel passed is outside valid range", THREAD);
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return;
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}
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if (tag_set < 0 || tag_set >= (jint)JFR_LOG_TAG_SET_COUNT) {
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JfrJavaSupport::throw_illegal_argument_exception("LogTagSet id is outside valid range", THREAD);
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return;
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}
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ResourceMark rm(THREAD);
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const char* const s = JfrJavaSupport::c_str(message, CHECK);
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assert(s != NULL, "invariant");
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assert(log_tag_sets[tag_set].log_tag_set != NULL, "LogTagSet is not init");
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log_tag_sets[tag_set].log_tag_set->log((LogLevelType)level, s);
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}
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