/*
* Copyright (c) 2016, 2019, 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 "jfr/jni/jfrJavaSupport.hpp"
#include "jfr/utilities/jfrJavaLog.hpp"
#include "jfr/utilities/jfrLogTagSets.hpp"
#include "logging/log.hpp"
#include "logging/logConfiguration.hpp"
#include "memory/resourceArea.hpp"
#include "runtime/thread.inline.hpp"
#define JFR_LOG_TAGS_CONCATED(T0, T1, T2, T3, T4, T5, ...) \
T0 ## _ ## T1 ## _ ## T2 ## _ ## T3 ## _ ## T4 ## _ ## T5
enum JfrLogTagSetType {
#define JFR_LOG_TAG(...) \
EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)),
JFR_LOG_TAG_SET_LIST
#undef JFR_LOG_TAG
JFR_LOG_TAG_SET_COUNT
};
struct jfrLogSubscriber
{
jobject log_tag_enum_ref;
LogTagSet* log_tag_set;
};
static jfrLogSubscriber log_tag_sets[JFR_LOG_TAG_SET_COUNT];
static void log_cfg_update(LogLevelType llt, JfrLogTagSetType jflt, TRAPS) {
DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
if (log_tag_sets[jflt].log_tag_enum_ref == NULL) {
return;
}
jobject lt = log_tag_sets[jflt].log_tag_enum_ref;
// set field tagSetLevel to llt value
JavaValue result(T_VOID);
JfrJavaArguments args(&result);
args.set_klass(JfrJavaSupport::klass(lt));
args.set_name("tagSetLevel");
args.set_signature("I");
args.set_receiver(JfrJavaSupport::resolve_non_null(lt));
args.push_int(llt);
JfrJavaSupport::set_field(&args, THREAD);
}
static LogLevelType highest_level(const LogTagSet& lts) {
for (size_t i = 0; i < LogLevel::Count; i++) {
if (lts.is_level((LogLevelType)i)) {
return (LogLevelType)i;
}
}
return LogLevel::Off;
}
static void log_config_change_internal(bool init, TRAPS) {
LogLevelType llt;
LogTagSet* lts;
#define JFR_LOG_TAG(...) \
lts = &LogTagSetMapping<LOG_TAGS(__VA_ARGS__)>::tagset(); \
if (init) { \
JfrLogTagSetType tagSetType = \
EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)); \
assert(NULL == log_tag_sets[tagSetType].log_tag_set, "Init JFR LogTagSets twice"); \
log_tag_sets[tagSetType].log_tag_set = lts; \
} \
llt = highest_level(*lts); \
log_cfg_update(llt, \
EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)), THREAD);
JFR_LOG_TAG_SET_LIST
#undef JFR_LOG_TAG
}
static void log_config_change() {
Thread* t = Thread::current();
DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(t));
log_config_change_internal(false, t);
}
void JfrJavaLog::subscribe_log_level(jobject log_tag, jint id, TRAPS) {
DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
static bool subscribed_updates = true;
assert(id < JFR_LOG_TAG_SET_COUNT,
"LogTag id, java and native not in synch, %d < %d", id, JFR_LOG_TAG_SET_COUNT);
assert(NULL == log_tag_sets[id].log_tag_enum_ref, "Subscribing twice");
log_tag_sets[id].log_tag_enum_ref = JfrJavaSupport::global_jni_handle(log_tag, THREAD);
if (subscribed_updates) {
LogConfiguration::register_update_listener(&log_config_change);
log_config_change_internal(true, THREAD);
subscribed_updates = false;
} else {
log_config_change_internal(false, THREAD);
}
}
void JfrJavaLog::log(jint tag_set, jint level, jstring message, TRAPS) {
DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
if (message == NULL) {
return;
}
if (level < (jint)LogLevel::First || level > (jint)LogLevel::Last) {
/**代码未完, 请加载全部代码(NowJava.com).**/