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
1 /*
2 * Copyright (c) 2016, 2018, 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.
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23 */
25 #ifndef SHARE_VM_JFR_CHECKPOINT_TYPES_TRACEID_JFRTRACEIDBITS_INLINE_HPP
26 #define SHARE_VM_JFR_CHECKPOINT_TYPES_TRACEID_JFRTRACEIDBITS_INLINE_HPP
28 #include "jfr/utilities/jfrTypes.hpp"
29 #include "runtime/atomic.inline.hpp"
30 #include "runtime/orderAccess.inline.hpp"
31 #include "utilities/macros.hpp"
33 #ifdef VM_LITTLE_ENDIAN
34 static const int low_offset = 0;
35 static const int leakp_offset = low_offset + 1;
36 #else
37 static const int low_offset = 7;
38 static const int leakp_offset = low_offset - 1;
39 #endif
41 inline void set_bits(jbyte bits, jbyte* const dest) {
42 assert(dest != NULL, "invariant");
43 const jbyte current = OrderAccess::load_acquire(dest);
44 if (bits != (current & bits)) {
45 *dest |= bits;
46 }
47 }
49 inline void set_mask(jbyte mask, jbyte* const dest) {
50 assert(dest != NULL, "invariant");
51 const jbyte current = OrderAccess::load_acquire(dest);
52 if (mask != (current & mask)) {
53 *dest &= mask;
54 }
55 }
57 inline void set_bits_cas(jbyte bits, jbyte* const dest) {
58 assert(dest != NULL, "invariant");
59 do {
60 const jbyte current = OrderAccess::load_acquire(dest);
61 if (bits == (current & bits)) {
62 return;
63 }
64 const jbyte new_value = current | bits;
65 if (Atomic::cmpxchg(new_value, dest, current) == current) {
66 return;
67 }
68 } while (true);
69 }
71 inline void clear_bits_cas(jbyte bits, jbyte* const dest) {
72 assert(dest != NULL, "invariant");
73 do {
74 const jbyte current = OrderAccess::load_acquire(dest);
75 if (bits != (current & bits)) {
76 return;
77 }
78 const jbyte new_value = current ^ bits;
79 if (Atomic::cmpxchg(new_value, dest, current) == current) {
80 return;
81 }
82 } while (true);
83 }
85 inline void set_traceid_bits(jbyte bits, traceid* dest) {
86 set_bits(bits, ((jbyte*)dest) + low_offset);
87 }
89 inline void set_traceid_bits_cas(jbyte bits, traceid* dest) {
90 set_bits_cas(bits, ((jbyte*)dest) + low_offset);
91 }
93 inline void set_traceid_mask(jbyte mask, traceid* dest) {
94 set_mask(mask, ((jbyte*)dest) + low_offset);
95 }
97 inline void set_leakp_traceid_bits(jbyte bits, traceid* dest) {
98 set_bits(bits, ((jbyte*)dest) + leakp_offset);
99 }
101 inline void set_leakp_traceid_bits_cas(jbyte bits, traceid* dest) {
102 set_bits_cas(bits, ((jbyte*)dest) + leakp_offset);
103 }
105 inline void set_leakp_traceid_mask(jbyte mask, traceid* dest) {
106 set_mask(mask, ((jbyte*)dest) + leakp_offset);
107 }
109 #endif // SHARE_VM_JFR_CHECKPOINT_TYPES_TRACEID_JFRTRACEIDBITS_INLINE_HPP