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/*
* Copyright (c) 1997, 2022, 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 "memory/allocation.inline.hpp"
#include "oops/instanceKlass.hpp"
#include "runtime/javaThread.hpp"
#include "runtime/mutexLocker.hpp"
#include "runtime/osThread.hpp"
#include "runtime/threadCritical.hpp"
#include "runtime/timer.hpp"
#include "utilities/events.hpp"
EventLog* Events::_logs = NULL;
StringEventLog* Events::_messages = NULL;
StringEventLog* Events::_vm_operations = NULL;
ExceptionsEventLog* Events::_exceptions = NULL;
StringEventLog* Events::_redefinitions = NULL;
UnloadingEventLog* Events::_class_unloading = NULL;
StringEventLog* Events::_class_loading = NULL;
StringEventLog* Events::_deopt_messages = NULL;
StringEventLog* Events::_dll_messages = NULL;
EventLog::EventLog() {
// This normally done during bootstrap when we're only single
// threaded but use a ThreadCritical to ensure inclusion in case
// some are created slightly late.
ThreadCritical tc;
_next = Events::_logs;
Events::_logs = this;
}
// For each registered event logger, print out the current contents of
// the buffer.
void Events::print_all(outputStream* out, int max) {
EventLog* log = _logs;
while (log != NULL) {
log->print_log_on(out, max);
log = log->next();
}
}
// Print a single event log specified by name.
void Events::print_one(outputStream* out, const char* log_name, int max) {
EventLog* log = _logs;
int num_printed = 0;
while (log != NULL) {
if (log->matches_name_or_handle(log_name)) {
log->print_log_on(out, max);
num_printed ++;
}
log = log->next();
}
// Write a short error note if no name matched.
if (num_printed == 0) {
out->print_cr("The name \"%s\" did not match any known event log. "
"Valid event log names are:", log_name);
EventLog* log = _logs;
while (log != NULL) {
log->print_names(out);
out->cr();
log = log->next();
}
}
}
void Events::print() {
print_all(tty);
}
void Events::init() {
if (LogEvents) {
_messages = new StringEventLog("Events", "events");
_vm_operations = new StringEventLog("VM Operations", "vmops");
_exceptions = new ExceptionsEventLog("Internal exceptions", "exc");
_redefinitions = new StringEventLog("Classes redefined", "redef");
_class_unloading = new UnloadingEventLog("Classes unloaded", "unload");
_class_loading = new StringEventLog("Classes loaded", "load");
_deopt_messages = new StringEventLog("Deoptimization events", "deopt");
_dll_messages = new StringEventLog("Dll operation events", "dll");
}
}
void eventlog_init() {
Events::init();
}
///////////////////////////////////////////////////////////////////////////
// EventMark
EventMarkBase::EventMarkBase(EventLogFunction log_function) :
_log_function(log_function),
_buffer() {}
void EventMarkBase::log_start(const char* format, va_list argp) {
// Save a copy of begin message and log it.
_buffer.printv(format, argp);
_log_function(NULL, "%s", _buffer.buffer());
}
void EventMarkBase::log_end() {
// Append " done" to the begin message and log it
_buffer.append(" done");
_log_function(NULL, "%s", _buffer.buffer());
}
void UnloadingEventLog::log(Thread* thread, InstanceKlass* ik) {
if (!should_log()) return;
double timestamp = fetch_timestamp();
// Unloading events are single threaded.
int index = compute_log_index();
_records[index].thread = thread;
_records[index].timestamp = timestamp;
stringStream st(_records[index].data.buffer(),
_records[index].data.size());
st.print("Unloading class " PTR_FORMAT " ", p2i(ik));
ik->name()->print_value_on(&st);
}
void ExceptionsEventLog::log(Thread* thread, Handle h_exception, const char* message, const char* file, int line) {
if (!should_log()) return;
double timestamp = fetch_timestamp();
MutexLocker ml(&_mutex, Mutex::_no_safepoint_check_flag);
int index = compute_log_index();
_records[index].thread = thread;
_records[index].timestamp = timestamp;
stringStream st(_records[index].data.buffer(),
_records[index].data.size());
st.print("Exception <");
h_exception->print_value_on(&st);
st.print("%s%s> (" PTR_FORMAT ") \n"
"thrown [%s, line %d]",
message ? ": " : "", message ? message : "",
p2i(h_exception()), file, line);
}
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