Mon, 12 Aug 2019 18:30:40 +0300
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
1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_OOPS_ARRAYKLASS_HPP
26 #define SHARE_VM_OOPS_ARRAYKLASS_HPP
28 #include "memory/universe.hpp"
29 #include "oops/klass.hpp"
31 class fieldDescriptor;
32 class klassVtable;
34 // ArrayKlass is the abstract baseclass for all array classes
36 class ArrayKlass: public Klass {
37 friend class VMStructs;
38 private:
39 int _dimension; // This is n'th-dimensional array.
40 Klass* volatile _higher_dimension; // Refers the (n+1)'th-dimensional array (if present).
41 Klass* volatile _lower_dimension; // Refers the (n-1)'th-dimensional array (if present).
42 int _vtable_len; // size of vtable for this klass
43 oop _component_mirror; // component type, as a java/lang/Class
45 protected:
46 // Constructors
47 // The constructor with the Symbol argument does the real array
48 // initialization, the other is a dummy
49 ArrayKlass(Symbol* name);
50 ArrayKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for cds"); }
52 public:
53 // Testing operation
54 bool oop_is_array_slow() const { return true; }
56 // Instance variables
57 int dimension() const { return _dimension; }
58 void set_dimension(int dimension) { _dimension = dimension; }
60 Klass* higher_dimension() const { return _higher_dimension; }
61 void set_higher_dimension(Klass* k) { _higher_dimension = k; }
62 Klass** adr_higher_dimension() { return (Klass**)&this->_higher_dimension;}
64 Klass* lower_dimension() const { return _lower_dimension; }
65 void set_lower_dimension(Klass* k) { _lower_dimension = k; }
66 Klass** adr_lower_dimension() { return (Klass**)&this->_lower_dimension;}
68 // offset of first element, including any padding for the sake of alignment
69 int array_header_in_bytes() const { return layout_helper_header_size(layout_helper()); }
70 int log2_element_size() const { return layout_helper_log2_element_size(layout_helper()); }
71 // type of elements (T_OBJECT for both oop arrays and array-arrays)
72 BasicType element_type() const { return layout_helper_element_type(layout_helper()); }
74 oop component_mirror() const { return _component_mirror; }
75 void set_component_mirror(oop m) { klass_oop_store(&_component_mirror, m); }
76 oop* adr_component_mirror() { return (oop*)&this->_component_mirror;}
78 // Compiler/Interpreter offset
79 static ByteSize component_mirror_offset() { return in_ByteSize(offset_of(ArrayKlass, _component_mirror)); }
81 virtual Klass* java_super() const;//{ return SystemDictionary::Object_klass(); }
83 // Allocation
84 // Sizes points to the first dimension of the array, subsequent dimensions
85 // are always in higher memory. The callers of these set that up.
86 virtual oop multi_allocate(int rank, jint* sizes, TRAPS);
87 objArrayOop allocate_arrayArray(int n, int length, TRAPS);
89 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined
90 Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
92 // Lookup operations
93 Method* uncached_lookup_method(Symbol* name, Symbol* signature, OverpassLookupMode overpass_mode) const;
95 // Casting from Klass*
96 static ArrayKlass* cast(Klass* k) {
97 assert(k->oop_is_array(), "cast to ArrayKlass");
98 return (ArrayKlass*) k;
99 }
101 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
102 bool compute_is_subtype_of(Klass* k);
104 // Sizing
105 static int header_size() { return sizeof(ArrayKlass)/HeapWordSize; }
106 static int static_size(int header_size);
108 #if INCLUDE_SERVICES
109 virtual void collect_statistics(KlassSizeStats *sz) const {
110 Klass::collect_statistics(sz);
111 // Do nothing for now, but remember to modify if you add new
112 // stuff to ArrayKlass.
113 }
114 #endif
116 // Java vtable
117 klassVtable* vtable() const; // return new klassVtable
118 int vtable_length() const { return _vtable_len; }
119 static int base_vtable_length() { return Universe::base_vtable_size(); }
120 void set_vtable_length(int len) { assert(len == base_vtable_length(), "bad length"); _vtable_len = len; }
121 protected:
122 inline intptr_t* start_of_vtable() const;
124 public:
125 // Iterators
126 void array_klasses_do(void f(Klass* k));
127 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS);
129 // GC support
130 virtual void oops_do(OopClosure* cl);
132 // Return a handle.
133 static void complete_create_array_klass(ArrayKlass* k, KlassHandle super_klass, TRAPS);
136 // jvm support
137 jint compute_modifier_flags(TRAPS) const;
139 // JVMTI support
140 jint jvmti_class_status() const;
142 // CDS support - remove and restore oops from metadata. Oops are not shared.
143 virtual void remove_unshareable_info();
144 virtual void restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain, TRAPS);
146 // Printing
147 void print_on(outputStream* st) const;
148 void print_value_on(outputStream* st) const;
150 void oop_print_on(oop obj, outputStream* st);
152 // Verification
153 void verify_on(outputStream* st);
155 void oop_verify_on(oop obj, outputStream* st);
156 };
158 #endif // SHARE_VM_OOPS_ARRAYKLASS_HPP