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8238236: Add JFR class redefinition events

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Reviewed-by: mgronlun
This commit is contained in:
Erik Gahlin 2020-02-17 22:36:13 +01:00
parent 74bee68872
commit 5d9c59f2f8
9 changed files with 129 additions and 7 deletions
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27
src/hotspot/share/prims/jvmtiRedefineClasses.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2003, 2020, 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
@ -35,6 +35,7 @@
#include "compiler/compileBroker.hpp"
#include "interpreter/oopMapCache.hpp"
#include "interpreter/rewriter.hpp"
#include "jfr/jfrEvents.hpp"
#include "logging/logStream.hpp"
#include "memory/metadataFactory.hpp"
#include "memory/metaspaceShared.hpp"
@ -51,6 +52,7 @@
#include "prims/jvmtiThreadState.inline.hpp"
#include "prims/resolvedMethodTable.hpp"
#include "prims/methodComparator.hpp"
#include "runtime/atomic.hpp"
#include "runtime/deoptimization.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/jniHandles.inline.hpp"
@ -70,7 +72,7 @@ int VM_RedefineClasses::_deleted_methods_length = 0;
int VM_RedefineClasses::_added_methods_length = 0;
bool VM_RedefineClasses::_has_redefined_Object = false;
bool VM_RedefineClasses::_has_null_class_loader = false;
u8 VM_RedefineClasses::_id_counter = 0;
VM_RedefineClasses::VM_RedefineClasses(jint class_count,
const jvmtiClassDefinition *class_defs,
@ -83,6 +85,7 @@ VM_RedefineClasses::VM_RedefineClasses(jint class_count,
_the_class = NULL;
_has_redefined_Object = false;
_has_null_class_loader = false;
_id = next_id();
}
static inline InstanceKlass* get_ik(jclass def) {
@ -4294,6 +4297,15 @@ void VM_RedefineClasses::redefine_single_class(jclass the_jclass,
}
increment_class_counter((InstanceKlass *)the_class, THREAD);
if (EventClassRedefinition::is_enabled()) {
EventClassRedefinition event;
event.set_classModificationCount(java_lang_Class::classRedefinedCount(the_class->java_mirror()));
event.set_redefinedClass(the_class);
event.set_redefinitionId(_id);
event.commit();
}
{
ResourceMark rm(THREAD);
// increment the classRedefinedCount field in the_class and in any
@ -4307,6 +4319,7 @@ void VM_RedefineClasses::redefine_single_class(jclass the_jclass,
}
_timer_rsc_phase2.stop();
} // end redefine_single_class()
@ -4393,6 +4406,16 @@ void VM_RedefineClasses::CheckClass::do_klass(Klass* k) {
}
}
u8 VM_RedefineClasses::next_id() {
while (true) {
u8 id = _id_counter;
u8 next_id = id + 1;
u8 result = Atomic::cmpxchg(&_id_counter, id, next_id);
if (result == id) {
return next_id;
}
}
}
void VM_RedefineClasses::dump_methods() {
int j;