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) 1999, 2013, 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 #include "precompiled.hpp"
26 #include "ci/ciKlass.hpp"
27 #include "ci/ciSymbol.hpp"
28 #include "ci/ciUtilities.hpp"
29 #include "oops/oop.inline.hpp"
31 // ciKlass
32 //
33 // This class represents a Klass* in the HotSpot virtual
34 // machine.
36 // ------------------------------------------------------------------
37 // ciKlass::ciKlass
38 ciKlass::ciKlass(KlassHandle h_k) : ciType(h_k) {
39 assert(get_Klass()->is_klass(), "wrong type");
40 Klass* k = get_Klass();
41 _layout_helper = k->layout_helper();
42 Symbol* klass_name = k->name();
43 assert(klass_name != NULL, "wrong ciKlass constructor");
44 _name = CURRENT_ENV->get_symbol(klass_name);
45 }
47 // ------------------------------------------------------------------
48 // ciKlass::ciKlass
49 //
50 // Nameless klass variant.
51 ciKlass::ciKlass(KlassHandle h_k, ciSymbol* name) : ciType(h_k) {
52 assert(get_Klass()->is_klass(), "wrong type");
53 _name = name;
54 _layout_helper = Klass::_lh_neutral_value;
55 }
57 // ------------------------------------------------------------------
58 // ciKlass::ciKlass
59 //
60 // Unloaded klass variant.
61 ciKlass::ciKlass(ciSymbol* name, BasicType bt) : ciType(bt) {
62 _name = name;
63 _layout_helper = Klass::_lh_neutral_value;
64 }
66 // ------------------------------------------------------------------
67 // ciKlass::is_subtype_of
68 bool ciKlass::is_subtype_of(ciKlass* that) {
69 assert(this->is_loaded(), err_msg("must be loaded: %s", this->name()->as_quoted_ascii()));
70 assert(that->is_loaded(), err_msg("must be loaded: %s", that->name()->as_quoted_ascii()));
72 // Check to see if the klasses are identical.
73 if (this == that) {
74 return true;
75 }
77 VM_ENTRY_MARK;
78 Klass* this_klass = get_Klass();
79 Klass* that_klass = that->get_Klass();
80 bool result = this_klass->is_subtype_of(that_klass);
82 return result;
83 }
85 // ------------------------------------------------------------------
86 // ciKlass::is_subclass_of
87 bool ciKlass::is_subclass_of(ciKlass* that) {
88 assert(this->is_loaded(), err_msg("must be loaded: %s", this->name()->as_quoted_ascii()));
89 assert(that->is_loaded(), err_msg("must be loaded: %s", that->name()->as_quoted_ascii()));
91 VM_ENTRY_MARK;
92 Klass* this_klass = get_Klass();
93 Klass* that_klass = that->get_Klass();
94 bool result = this_klass->is_subclass_of(that_klass);
96 return result;
97 }
99 // ------------------------------------------------------------------
100 // ciKlass::super_depth
101 juint ciKlass::super_depth() {
102 assert(is_loaded(), "must be loaded");
104 VM_ENTRY_MARK;
105 Klass* this_klass = get_Klass();
106 return this_klass->super_depth();
107 }
109 // ------------------------------------------------------------------
110 // ciKlass::super_check_offset
111 juint ciKlass::super_check_offset() {
112 assert(is_loaded(), "must be loaded");
114 VM_ENTRY_MARK;
115 Klass* this_klass = get_Klass();
116 return this_klass->super_check_offset();
117 }
119 // ------------------------------------------------------------------
120 // ciKlass::super_of_depth
121 ciKlass* ciKlass::super_of_depth(juint i) {
122 assert(is_loaded(), "must be loaded");
124 VM_ENTRY_MARK;
125 Klass* this_klass = get_Klass();
126 Klass* super = this_klass->primary_super_of_depth(i);
127 return (super != NULL) ? CURRENT_THREAD_ENV->get_klass(super) : NULL;
128 }
130 // ------------------------------------------------------------------
131 // ciKlass::can_be_primary_super
132 bool ciKlass::can_be_primary_super() {
133 assert(is_loaded(), "must be loaded");
135 VM_ENTRY_MARK;
136 Klass* this_klass = get_Klass();
137 return this_klass->can_be_primary_super();
138 }
140 // ------------------------------------------------------------------
141 // ciKlass::least_common_ancestor
142 //
143 // Get the shared parent of two klasses.
144 //
145 // Implementation note: this method currently goes "over the wall"
146 // and does all of the work on the VM side. It could be rewritten
147 // to use the super() method and do all of the work (aside from the
148 // lazy computation of super()) in native mode. This may be
149 // worthwhile if the compiler is repeatedly requesting the same lca
150 // computation or possibly if most of the superklasses have already
151 // been created as ciObjects anyway. Something to think about...
152 ciKlass*
153 ciKlass::least_common_ancestor(ciKlass* that) {
154 assert(is_loaded() && that->is_loaded(), "must be loaded");
155 // Check to see if the klasses are identical.
156 if (this == that) {
157 return this;
158 }
160 VM_ENTRY_MARK;
161 Klass* this_klass = get_Klass();
162 Klass* that_klass = that->get_Klass();
163 Klass* lca = this_klass->LCA(that_klass);
165 // Many times the LCA will be either this_klass or that_klass.
166 // Treat these as special cases.
167 if (lca == that_klass) {
168 return that;
169 }
170 if (this_klass == lca) {
171 return this;
172 }
174 // Create the ciInstanceKlass for the lca.
175 ciKlass* result =
176 CURRENT_THREAD_ENV->get_klass(lca);
178 return result;
179 }
181 // ------------------------------------------------------------------
182 // ciKlass::find_klass
183 //
184 // Find a klass using this klass's class loader.
185 ciKlass* ciKlass::find_klass(ciSymbol* klass_name) {
186 assert(is_loaded(), "cannot find_klass through an unloaded klass");
187 return CURRENT_ENV->get_klass_by_name(this,
188 klass_name, false);
189 }
191 // ------------------------------------------------------------------
192 // ciKlass::java_mirror
193 //
194 // Get the instance of java.lang.Class corresponding to this klass.
195 // If it is an unloaded instance or array klass, return an unloaded
196 // mirror object of type Class.
197 ciInstance* ciKlass::java_mirror() {
198 GUARDED_VM_ENTRY(
199 if (!is_loaded())
200 return ciEnv::current()->get_unloaded_klass_mirror(this);
201 oop java_mirror = get_Klass()->java_mirror();
202 return CURRENT_ENV->get_instance(java_mirror);
203 )
204 }
206 // ------------------------------------------------------------------
207 // ciKlass::modifier_flags
208 jint ciKlass::modifier_flags() {
209 assert(is_loaded(), "not loaded");
210 GUARDED_VM_ENTRY(
211 return get_Klass()->modifier_flags();
212 )
213 }
215 // ------------------------------------------------------------------
216 // ciKlass::access_flags
217 jint ciKlass::access_flags() {
218 assert(is_loaded(), "not loaded");
219 GUARDED_VM_ENTRY(
220 return get_Klass()->access_flags().as_int();
221 )
222 }
224 // ------------------------------------------------------------------
225 // ciKlass::print_impl
226 //
227 // Implementation of the print method
228 void ciKlass::print_impl(outputStream* st) {
229 st->print(" name=");
230 print_name_on(st);
231 }
233 // ------------------------------------------------------------------
234 // ciKlass::print_name
235 //
236 // Print the name of this klass
237 void ciKlass::print_name_on(outputStream* st) {
238 name()->print_symbol_on(st);
239 }