Mon, 19 Aug 2019 10:11:31 +0200
8229401: Fix JFR code cache test failures
8223689: Add JFR Thread Sampling Support
8223690: Add JFR BiasedLock Event Support
8223691: Add JFR G1 Region Type Change Event Support
8223692: Add JFR G1 Heap Summary Event Support
Summary: Backport JFR from JDK11, additional fixes
Reviewed-by: neugens, apetushkov
Contributed-by: denghui.ddh@alibaba-inc.com
apetushkov@9858 | 1 | /* |
apetushkov@9858 | 2 | * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved. |
apetushkov@9858 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
apetushkov@9858 | 4 | * |
apetushkov@9858 | 5 | * This code is free software; you can redistribute it and/or modify it |
apetushkov@9858 | 6 | * under the terms of the GNU General Public License version 2 only, as |
apetushkov@9858 | 7 | * published by the Free Software Foundation. |
apetushkov@9858 | 8 | * |
apetushkov@9858 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
apetushkov@9858 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
apetushkov@9858 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
apetushkov@9858 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
apetushkov@9858 | 13 | * accompanied this code). |
apetushkov@9858 | 14 | * |
apetushkov@9858 | 15 | * You should have received a copy of the GNU General Public License version |
apetushkov@9858 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
apetushkov@9858 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
apetushkov@9858 | 18 | * |
apetushkov@9858 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
apetushkov@9858 | 20 | * or visit www.oracle.com if you need additional information or have any |
apetushkov@9858 | 21 | * questions. |
apetushkov@9858 | 22 | * |
apetushkov@9858 | 23 | */ |
apetushkov@9858 | 24 | |
apetushkov@9858 | 25 | #ifndef SHARE_VM_JFR_CHECKPOINT_TYPES_TRACEID_JFRTRACEID_HPP |
apetushkov@9858 | 26 | #define SHARE_VM_JFR_CHECKPOINT_TYPES_TRACEID_JFRTRACEID_HPP |
apetushkov@9858 | 27 | |
apetushkov@9858 | 28 | #include "jni.h" |
apetushkov@9858 | 29 | #include "jfr/utilities/jfrTypes.hpp" |
apetushkov@9858 | 30 | #include "memory/allocation.hpp" |
apetushkov@9858 | 31 | |
apetushkov@9858 | 32 | class ClassLoaderData; |
apetushkov@9858 | 33 | class Klass; |
apetushkov@9858 | 34 | class Method; |
apetushkov@9858 | 35 | // XXX class PackageEntry; |
apetushkov@9858 | 36 | class Thread; |
apetushkov@9858 | 37 | |
apetushkov@9858 | 38 | /* |
apetushkov@9858 | 39 | * JfrTraceId is a means of tagging, e.g. marking, specific instances as being actively in-use. |
apetushkov@9858 | 40 | * The most common situation is a committed event that has a field that is referring to a specific instance. |
apetushkov@9858 | 41 | * Now there exist a relation between an event (field) and an artifact of some kind. |
apetushkov@9858 | 42 | * We track this relation during runtime using the JfrTraceId mechanism in order to reify it into the chunk |
apetushkov@9858 | 43 | * where the event is finally written. |
apetushkov@9858 | 44 | * |
apetushkov@9858 | 45 | * It is the event commit mechanism that tags instances as in-use. The tag routines return the untagged traceid |
apetushkov@9858 | 46 | * as a mapping key, and the commit mechanism writes the key into the event field. |
apetushkov@9858 | 47 | * Consequently, the mechanism is opaque and not something a user needs to know about. |
apetushkov@9858 | 48 | * Indeed, the API promotes using well-known JVM concepts directly in events, such as having a Klass* as an event field. |
apetushkov@9858 | 49 | * |
apetushkov@9858 | 50 | * Tagging allows for many-to-one mappings of constants, lazy evaluation / collection of tags during chunk rotation |
apetushkov@9858 | 51 | * and concurrency (by using an epoch relative tagging scheme). |
apetushkov@9858 | 52 | * |
apetushkov@9858 | 53 | * JfrTraceId(s) have been added to support tagging instances of classes such as: |
apetushkov@9858 | 54 | * |
apetushkov@9858 | 55 | * Klass (includes Method) |
apetushkov@9858 | 56 | * ClassLoaderData |
apetushkov@9858 | 57 | * XXX PackageEntry |
apetushkov@9858 | 58 | * |
apetushkov@9858 | 59 | * These classes have been extended to include a _traceid field (64-bits). |
apetushkov@9858 | 60 | * |
apetushkov@9858 | 61 | * Each instance is uniquely identified by a type-relative monotonic counter that is unique over the VM lifecycle. |
apetushkov@9858 | 62 | * "Tagging an instance" essentially means to set contextually determined (by epoch) marker bits in the _traceid field. |
apetushkov@9858 | 63 | * The constants associated with a tagged instance is a set of which is determined by a constant type definition, |
apetushkov@9858 | 64 | * and these constants are then serialized in an upcoming checkpoint event for the relevant chunk. |
apetushkov@9858 | 65 | * |
apetushkov@9858 | 66 | * Note that a "tagging" is relative to a chunk. Having serialized the tagged instance, the tag bits are reset (for that epoch). |
apetushkov@9858 | 67 | * As mentioned previously, the returned traceid is always the untagged value. |
apetushkov@9858 | 68 | * |
apetushkov@9858 | 69 | * We also use the _traceid field in Klass to quickly identify (bit check) if a newly loaded klass is of type jdk.jfr.Event. |
apetushkov@9858 | 70 | * (see jfr/instrumentation/jfrEventClassTransformer.cpp) |
apetushkov@9858 | 71 | * |
apetushkov@9858 | 72 | * |
apetushkov@9858 | 73 | * _traceid bit layout and description planned to go here |
apetushkov@9858 | 74 | * |
apetushkov@9858 | 75 | * |
apetushkov@9858 | 76 | */ |
apetushkov@9858 | 77 | |
apetushkov@9858 | 78 | class JfrTraceId : public AllStatic { |
apetushkov@9858 | 79 | public: |
apetushkov@9858 | 80 | static void assign(const Klass* klass); |
apetushkov@9858 | 81 | // XXX static void assign(const PackageEntry* package); |
apetushkov@9858 | 82 | static void assign(const ClassLoaderData* cld); |
apetushkov@9858 | 83 | static traceid assign_thread_id(); |
apetushkov@9858 | 84 | |
apetushkov@9858 | 85 | static traceid get(const Klass* klass); |
apetushkov@9858 | 86 | static traceid get(jclass jc); |
apetushkov@9858 | 87 | static traceid get(const Thread* thread); |
apetushkov@9858 | 88 | |
apetushkov@9858 | 89 | // tag construct as used, returns pre-tagged traceid |
apetushkov@9858 | 90 | static traceid use(const Klass* klass, bool leakp = false); |
apetushkov@9858 | 91 | static traceid use(jclass jc, bool leakp = false); |
apetushkov@9858 | 92 | static traceid use(const Method* method, bool leakp = false); |
apetushkov@9858 | 93 | // XXX static traceid use(const PackageEntry* package, bool leakp = false); |
apetushkov@9858 | 94 | static traceid use(const ClassLoaderData* cld, bool leakp = false); |
apetushkov@9858 | 95 | |
apetushkov@9858 | 96 | static void remove(const Klass* klass); |
apetushkov@9858 | 97 | static void restore(const Klass* klass); |
apetushkov@9858 | 98 | |
apetushkov@9858 | 99 | // set of event classes made visible to java |
apetushkov@9858 | 100 | static bool in_visible_set(const Klass* k); |
apetushkov@9858 | 101 | static bool in_visible_set(const jclass jc); |
apetushkov@9858 | 102 | |
apetushkov@9858 | 103 | // jdk.jfr.Event |
apetushkov@9858 | 104 | static bool is_jdk_jfr_event(const Klass* k); |
apetushkov@9858 | 105 | static bool is_jdk_jfr_event(const jclass jc); |
apetushkov@9858 | 106 | static void tag_as_jdk_jfr_event(const Klass* k); |
apetushkov@9858 | 107 | |
apetushkov@9858 | 108 | // jdk.jfr.Event subklasses |
apetushkov@9858 | 109 | static bool is_jdk_jfr_event_sub(const Klass* k); |
apetushkov@9858 | 110 | static bool is_jdk_jfr_event_sub(const jclass jc); |
apetushkov@9858 | 111 | static void tag_as_jdk_jfr_event_sub(const Klass* k); |
apetushkov@9858 | 112 | static void tag_as_jdk_jfr_event_sub(const jclass jc); |
apetushkov@9858 | 113 | |
apetushkov@9858 | 114 | static bool in_jdk_jfr_event_hierarchy(const Klass* k); |
apetushkov@9858 | 115 | static bool in_jdk_jfr_event_hierarchy(const jclass jc); |
apetushkov@9858 | 116 | |
apetushkov@9858 | 117 | // klasses that host an event |
apetushkov@9858 | 118 | static bool is_event_host(const Klass* k); |
apetushkov@9858 | 119 | static bool is_event_host(const jclass jc); |
apetushkov@9858 | 120 | static void tag_as_event_host(const Klass* k); |
apetushkov@9858 | 121 | static void tag_as_event_host(const jclass jc); |
apetushkov@9858 | 122 | }; |
apetushkov@9858 | 123 | |
apetushkov@9858 | 124 | #endif // SHARE_VM_JFR_CHECKPOINT_TYPES_TRACEID_JFRTRACEID_HPP |