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src/share/vm/oops/compiledICHolder.hpp@b985cbb00e68 (annotated)
src/share/vm/oops/compiledICHolder.hpp
Mon, 12 Aug 2019 18:30:40 +0300
- author
- apetushkov
- date
- Mon, 12 Aug 2019 18:30:40 +0300
- changeset 9858
- b985cbb00e68
- parent 9185
- 82f9d3b7e317
- child 9203
- 53eec13fbaa5
- permissions
- -rw-r--r--
8223147: JFR Backport
8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens
| duke@435 | 1 | /* |
| poonam@9185 | 2 | * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_OOPS_COMPILEDICHOLDEROOP_HPP |
| stefank@2314 | 26 | #define SHARE_VM_OOPS_COMPILEDICHOLDEROOP_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "oops/oop.hpp" |
| poonam@9185 | 29 | #include "oops/klass.hpp" |
| poonam@9185 | 30 | #include "oops/method.hpp" |
| stefank@2314 | 31 | |
| coleenp@4037 | 32 | // A CompiledICHolder* is a helper object for the inline cache implementation. |
| dbuck@8997 | 33 | // It holds: |
| dbuck@8997 | 34 | // (1) (method+klass pair) when converting from compiled to an interpreted call |
| dbuck@8997 | 35 | // (2) (klass+klass pair) when calling itable stub from megamorphic compiled call |
| duke@435 | 36 | // |
| coleenp@4037 | 37 | // These are always allocated in the C heap and are freed during a |
| coleenp@4037 | 38 | // safepoint by the ICBuffer logic. It's unsafe to free them earlier |
| coleenp@4037 | 39 | // since they might be in use. |
| coleenp@4037 | 40 | // |
| duke@435 | 41 | |
| duke@435 | 42 | |
| coleenp@4037 | 43 | class CompiledICHolder : public CHeapObj<mtCompiler> { |
| duke@435 | 44 | friend class VMStructs; |
| duke@435 | 45 | private: |
| coleenp@4037 | 46 | static volatile int _live_count; // allocated |
| coleenp@4037 | 47 | static volatile int _live_not_claimed_count; // allocated but not yet in use so not |
| coleenp@4037 | 48 | // reachable by iterating over nmethods |
| coleenp@4037 | 49 | |
| dbuck@8997 | 50 | Metadata* _holder_metadata; |
| coleenp@4037 | 51 | Klass* _holder_klass; // to avoid name conflict with oopDesc::_klass |
| coleenp@4037 | 52 | CompiledICHolder* _next; |
| poonam@9185 | 53 | bool _is_metadata_method; |
| coleenp@4037 | 54 | |
| duke@435 | 55 | public: |
| coleenp@4037 | 56 | // Constructor |
| poonam@9185 | 57 | CompiledICHolder(Metadata* metadata, Klass* klass, bool is_method = true) |
| poonam@9185 | 58 | : _holder_metadata(metadata), _holder_klass(klass), _is_metadata_method(is_method) { |
| coleenp@4037 | 59 | #ifdef ASSERT |
| coleenp@4037 | 60 | Atomic::inc(&_live_count); |
| coleenp@4037 | 61 | Atomic::inc(&_live_not_claimed_count); |
| coleenp@4037 | 62 | #endif |
| coleenp@4037 | 63 | } |
| coleenp@4037 | 64 | |
| coleenp@4037 | 65 | ~CompiledICHolder() { |
| coleenp@4037 | 66 | #ifdef ASSERT |
| coleenp@4037 | 67 | assert(_live_count > 0, "underflow"); |
| coleenp@4037 | 68 | Atomic::dec(&_live_count); |
| coleenp@4037 | 69 | #endif |
| coleenp@4037 | 70 | } |
| coleenp@4037 | 71 | |
| coleenp@4037 | 72 | static int live_count() { return _live_count; } |
| coleenp@4037 | 73 | static int live_not_claimed_count() { return _live_not_claimed_count; } |
| coleenp@4037 | 74 | |
| duke@435 | 75 | // accessors |
| coleenp@4037 | 76 | Klass* holder_klass() const { return _holder_klass; } |
| dbuck@8997 | 77 | Metadata* holder_metadata() const { return _holder_metadata; } |
| duke@435 | 78 | |
| dbuck@8997 | 79 | void set_holder_metadata(Metadata* m) { _holder_metadata = m; } |
| dbuck@8997 | 80 | void set_holder_klass(Klass* k) { _holder_klass = k; } |
| duke@435 | 81 | |
| dbuck@8997 | 82 | static int holder_metadata_offset() { return offset_of(CompiledICHolder, _holder_metadata); } |
| coleenp@4037 | 83 | static int holder_klass_offset() { return offset_of(CompiledICHolder, _holder_klass); } |
| duke@435 | 84 | |
| coleenp@4037 | 85 | CompiledICHolder* next() { return _next; } |
| coleenp@4037 | 86 | void set_next(CompiledICHolder* n) { _next = n; } |
| coleenp@4037 | 87 | |
| poonam@9185 | 88 | inline bool is_loader_alive(BoolObjectClosure* is_alive) { |
| poonam@9185 | 89 | Klass* k = _is_metadata_method ? ((Method*)_holder_metadata)->method_holder() : (Klass*)_holder_metadata; |
| poonam@9185 | 90 | if (!k->is_loader_alive(is_alive)) { |
| poonam@9185 | 91 | return false; |
| poonam@9185 | 92 | } |
| poonam@9185 | 93 | if (!_holder_klass->is_loader_alive(is_alive)) { |
| poonam@9185 | 94 | return false; |
| poonam@9185 | 95 | } |
| poonam@9185 | 96 | return true; |
| poonam@9185 | 97 | } |
| dbuck@8997 | 98 | |
| coleenp@4037 | 99 | // Verify |
| coleenp@4037 | 100 | void verify_on(outputStream* st); |
| coleenp@4037 | 101 | |
| coleenp@4037 | 102 | // Printing |
| coleenp@4037 | 103 | void print_on(outputStream* st) const; |
| coleenp@4037 | 104 | void print_value_on(outputStream* st) const; |
| coleenp@4037 | 105 | |
| coleenp@4037 | 106 | const char* internal_name() const { return "{compiledICHolder}"; } |
| coleenp@4037 | 107 | |
| coleenp@4037 | 108 | void claim() { |
| coleenp@4037 | 109 | #ifdef ASSERT |
| coleenp@4037 | 110 | Atomic::dec(&_live_not_claimed_count); |
| coleenp@4037 | 111 | #endif |
| coleenp@4037 | 112 | } |
| duke@435 | 113 | }; |
| stefank@2314 | 114 | |
| stefank@2314 | 115 | #endif // SHARE_VM_OOPS_COMPILEDICHOLDEROOP_HPP |
