/*
* Copyright (c) 2017, 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 "classfile/javaClasses.hpp"
#include "classfile/symbolTable.hpp"
#include "classfile/systemDictionary.hpp"
#include "jfr/leakprofiler/checkpoint/objectSampleDescription.hpp"
#include "jfr/recorder/checkpoint/jfrCheckpointWriter.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/fieldDescriptor.inline.hpp"
#include "runtime/thread.hpp"
#include "utilities/ostream.hpp"
static Symbol* symbol_size = NULL;
ObjectDescriptionBuilder::ObjectDescriptionBuilder() {
reset();
}
void ObjectDescriptionBuilder::write_int(jint value) {
char buf[20];
jio_snprintf(buf, sizeof(buf), "%d", value);
write_text(buf);
}
void ObjectDescriptionBuilder::write_text(const char* text) {
if (_index == sizeof(_buffer) - 2) {
return;
}
while (*text != '\0' && _index < sizeof(_buffer) - 2) {
_buffer[_index] = *text;
_index++;
text++;
}
assert(_index < sizeof(_buffer) - 1, "index should not exceed buffer size");
// add ellipsis if we reached end
if (_index == sizeof(_buffer) - 2) {
_buffer[_index-3] = '.';
_buffer[_index-2] = '.';
_buffer[_index-1] = '.';
}
// terminate string
_buffer[_index] = '\0';
}
void ObjectDescriptionBuilder::reset() {
_index = 0;
_buffer[0] = '\0';
}
void ObjectDescriptionBuilder::print_description(outputStream* out) {
out->print("%s", (const char*)_buffer);
}
const char* ObjectDescriptionBuilder::description() {
if (_buffer[0] == '\0') {
return NULL;
}
const size_t len = strlen(_buffer);
char* copy = NEW_RESOURCE_ARRAY(char, len + 1);
assert(copy != NULL, "invariant");
strncpy(copy, _buffer, len + 1);
return copy;
}
ObjectSampleDescription::ObjectSampleDescription(oop object) :
_object(object) {
}
void ObjectSampleDescription::ensure_initialized() {
if (symbol_size == NULL) {
symbol_size = SymbolTable::new_permanent_symbol("size");
}
}
void ObjectSampleDescription::print_description(outputStream* out) {
write_object_to_buffer();
_description.print_description(out);
}
const char* ObjectSampleDescription::description() {
write_object_to_buffer();
return _description.description();
}
void ObjectSampleDescription::write_text(const char* text) {
_description.write_text(text);
}
void ObjectSampleDescription::write_int(jint value) {
_description.write_int(value);
}
void ObjectSampleDescription::write_object_to_buffer() {
ensure_initialized();
_description.reset();
write_object_details();
}
void ObjectSampleDescription::write_object_details() {
Klass* klass = _object->klass();
Symbol* class_name = klass->name();
jint size;
if (_object->is_a(SystemDictionary::Class_klass())) {
write_class_name();
return;
}
if (_object->is_a(SystemDictionary::Thread_klass())) {
write_thread_name();
return;
}
if (_object->is_a(SystemDictionary::ThreadGroup_klass())) {
write_thread_group_name();
return;
}
if (read_int_size(&size)) {
write_size(size);
return;
}
}
void ObjectSampleDescription::write_class_name() {
assert(_object->is_a(SystemDictionary::Class_klass()), "invariant");
const Klass* const k = java_lang_Class::as_Klass(_object);
if (k == NULL) {
// might represent a primitive
const Klass* const ak = java_lang_Class::array_klass_acquire(_object);
// If ak is NULL, this is most likely a mirror associated with a
// jvmti redefine/retransform scratch klass. We can't get any additional
// information from it.
if (ak != NULL) {
write_text(type2name(java_lang_Class::primitive_type(_object)));
}
return;
}
if (k->is_instance_klass()) {
const InstanceKlass* ik = InstanceKlass::cast(k);
if (ik->is_unsafe_anonymous()) {
return;
}
assert(!ik->is_unsafe_anonymous(), "invariant");
const Symbol* name = ik->name();
if (name != NULL) {
write_text("Class Name: ");
write_text(name->as_klass_external_name());
}
}
}
void ObjectSampleDescription::write_thread_group_name() {
assert(_object->is_a(SystemDictionary::ThreadGroup_klass()), "invariant");
const char* tg_name = java_lang_ThreadGroup::name(_object);
if (tg_name != NULL) {
write_text("Thread Group: ");
write_text(tg_name);
}
}
void ObjectSampleDescription::write_thread_name() {
assert(_object->is_a(SystemDictionary::Thread_klass()), "invariant");
oop name = java_lang_Thread::name(_object);
if (name != NULL) {
char* p = java_lang_String::as_utf8_string(name);
if (p != NULL) {
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