1 /*
2 * Copyright (c) 2017, 2025, 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
24 #ifndef SHARE_GC_Z_ZBARRIERSET_INLINE_HPP
25 #define SHARE_GC_Z_ZBARRIERSET_INLINE_HPP
26
27 #include "gc/z/zBarrierSet.hpp"
28
29 #include "gc/shared/accessBarrierSupport.inline.hpp"
30 #include "gc/z/zAddress.hpp"
31 #include "gc/z/zAddress.inline.hpp"
32 #include "gc/z/zHeap.hpp"
33 #include "gc/z/zNMethod.hpp"
34 #include "oops/inlineKlass.inline.hpp"
35 #include "oops/objArrayOop.hpp"
36 #include "utilities/copy.hpp"
37 #include "utilities/debug.hpp"
38
39 template <DecoratorSet decorators, typename BarrierSetT>
40 template <DecoratorSet expected>
41 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::verify_decorators_present() {
42 if ((decorators & expected) == 0) {
43 fatal("Using unsupported access decorators");
44 }
45 }
46
47 template <DecoratorSet decorators, typename BarrierSetT>
48 template <DecoratorSet expected>
49 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::verify_decorators_absent() {
50 if ((decorators & expected) != 0) {
51 fatal("Using unsupported access decorators");
52 }
53 }
54
55 template <DecoratorSet decorators, typename BarrierSetT>
56 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::unsupported() {
57 ShouldNotReachHere();
58 }
59
60 template <DecoratorSet decorators, typename BarrierSetT>
61 inline zpointer* ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::field_addr(oop base, ptrdiff_t offset) {
62 assert(base != nullptr, "Invalid base");
63 return reinterpret_cast<zpointer*>(reinterpret_cast<intptr_t>((void*)base) + offset);
64 }
65
66 template <DecoratorSet decorators, typename BarrierSetT>
67 inline zaddress ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::load_barrier(zpointer* p, zpointer o) {
68 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
69
70 if (HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
71 if (HasDecorator<decorators, ON_STRONG_OOP_REF>::value) {
72 // Load barriers on strong oop refs don't keep objects alive
73 return ZBarrierSet::load_barrier_on_oop_field_preloaded(p, o);
74 } else if (HasDecorator<decorators, ON_WEAK_OOP_REF>::value) {
75 return ZBarrierSet::no_keep_alive_load_barrier_on_weak_oop_field_preloaded(p, o);
76 } else {
77 assert((HasDecorator<decorators, ON_PHANTOM_OOP_REF>::value), "Must be");
78 return ZBarrierSet::no_keep_alive_load_barrier_on_phantom_oop_field_preloaded(p, o);
79 }
80 } else {
81 if (HasDecorator<decorators, ON_STRONG_OOP_REF>::value) {
82 return ZBarrierSet::load_barrier_on_oop_field_preloaded(p, o);
83 } else if (HasDecorator<decorators, ON_WEAK_OOP_REF>::value) {
84 return ZBarrierSet::load_barrier_on_weak_oop_field_preloaded(p, o);
85 } else {
86 assert((HasDecorator<decorators, ON_PHANTOM_OOP_REF>::value), "Must be");
87 return ZBarrierSet::load_barrier_on_phantom_oop_field_preloaded(p, o);
88 }
89 }
90 }
91
92 template <DecoratorSet decorators, typename BarrierSetT>
93 inline zaddress ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::load_barrier_on_unknown_oop_ref(oop base, ptrdiff_t offset, zpointer* p, zpointer o) {
94 verify_decorators_present<ON_UNKNOWN_OOP_REF>();
95
96 const DecoratorSet decorators_known_strength =
97 AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset);
98
99 if (HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
100 if (decorators_known_strength & ON_STRONG_OOP_REF) {
101 // Load barriers on strong oop refs don't keep objects alive
102 return ZBarrierSet::load_barrier_on_oop_field_preloaded(p, o);
103 } else if (decorators_known_strength & ON_WEAK_OOP_REF) {
104 return ZBarrierSet::no_keep_alive_load_barrier_on_weak_oop_field_preloaded(p, o);
105 } else {
106 assert(decorators_known_strength & ON_PHANTOM_OOP_REF, "Must be");
107 return ZBarrierSet::no_keep_alive_load_barrier_on_phantom_oop_field_preloaded(p, o);
108 }
109 } else {
110 if (decorators_known_strength & ON_STRONG_OOP_REF) {
111 return ZBarrierSet::load_barrier_on_oop_field_preloaded(p, o);
112 } else if (decorators_known_strength & ON_WEAK_OOP_REF) {
113 return ZBarrierSet::load_barrier_on_weak_oop_field_preloaded(p, o);
114 } else {
115 assert(decorators_known_strength & ON_PHANTOM_OOP_REF, "Must be");
116 return ZBarrierSet::load_barrier_on_phantom_oop_field_preloaded(p, o);
117 }
118 }
119 }
120
121 inline zpointer ZBarrierSet::store_good(oop obj) {
122 assert(ZPointerStoreGoodMask != 0, "sanity");
123
124 const zaddress addr = to_zaddress(obj);
125 return ZAddress::store_good(addr);
126 }
127
128 template <DecoratorSet decorators, typename BarrierSetT>
129 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::store_barrier_heap_with_healing(zpointer* p) {
130 if (!HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value) {
131 ZBarrierSet::store_barrier_on_heap_oop_field(p, true /* heal */);
132 } else {
133 assert(false, "Should not be used on uninitialized memory");
134 }
135 }
136
137 template <DecoratorSet decorators, typename BarrierSetT>
138 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::store_barrier_heap_without_healing(zpointer* p) {
139 if (!HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value) {
140 ZBarrierSet::store_barrier_on_heap_oop_field(p, false /* heal */);
141 }
142 }
143
144 template <DecoratorSet decorators, typename BarrierSetT>
145 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::no_keep_alive_store_barrier_heap(zpointer* p) {
146 if (!HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value) {
147 ZBarrierSet::no_keep_alive_store_barrier_on_heap_oop_field(p);
148 }
149 }
150
151 template <DecoratorSet decorators, typename BarrierSetT>
152 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::store_barrier_native_with_healing(zpointer* p) {
153 if (!HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value) {
154 ZBarrierSet::store_barrier_on_native_oop_field(p, true /* heal */);
155 } else {
156 assert(false, "Should not be used on uninitialized memory");
157 }
158 }
159
160 template <DecoratorSet decorators, typename BarrierSetT>
161 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::store_barrier_native_without_healing(zpointer* p) {
162 if (!HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value) {
163 ZBarrierSet::store_barrier_on_native_oop_field(p, false /* heal */);
164 }
165 }
166
167 //
168 // In heap
169 //
170 template <DecoratorSet decorators, typename BarrierSetT>
171 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_in_heap(zpointer* p) {
172 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
173
174 const zpointer o = Raw::load_in_heap(p);
175 assert_is_valid(o);
176
177 return to_oop(load_barrier(p, o));
178 }
179
180 template <DecoratorSet decorators, typename BarrierSetT>
181 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_in_heap_at(oop base, ptrdiff_t offset) {
182 zpointer* const p = field_addr(base, offset);
183
184 const zpointer o = Raw::load_in_heap(p);
185 assert_is_valid(o);
186
187 if (HasDecorator<decorators, ON_UNKNOWN_OOP_REF>::value) {
188 return to_oop(load_barrier_on_unknown_oop_ref(base, offset, p, o));
189 }
190
191 return to_oop(load_barrier(p, o));
192 }
193
194 template <DecoratorSet decorators>
195 bool is_store_barrier_no_keep_alive() {
196 if (HasDecorator<decorators, ON_STRONG_OOP_REF>::value) {
197 return HasDecorator<decorators, AS_NO_KEEPALIVE>::value;
198 }
199
200 if (HasDecorator<decorators, ON_WEAK_OOP_REF>::value) {
201 return true;
202 }
203
204 assert((decorators & ON_PHANTOM_OOP_REF) != 0, "Must be");
205 return true;
206 }
207
208 template <DecoratorSet decorators>
209 inline bool is_store_barrier_no_keep_alive(oop base, ptrdiff_t offset) {
210 if (!HasDecorator<decorators, ON_UNKNOWN_OOP_REF>::value) {
211 return is_store_barrier_no_keep_alive<decorators>();
212 }
213
214 const DecoratorSet decorators_known_strength =
215 AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset);
216
217 if ((decorators_known_strength & ON_STRONG_OOP_REF) != 0) {
218 return (decorators & AS_NO_KEEPALIVE) != 0;
219 }
220
221 if ((decorators_known_strength & ON_WEAK_OOP_REF) != 0) {
222 return true;
223 }
224
225 assert((decorators_known_strength & ON_PHANTOM_OOP_REF) != 0, "Must be");
226 return true;
227 }
228
229 template <DecoratorSet decorators, typename BarrierSetT>
230 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_store_in_heap(zpointer* p, oop value) {
231 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
232
233 if (is_store_barrier_no_keep_alive<decorators>()) {
234 no_keep_alive_store_barrier_heap(p);
235 } else {
236 store_barrier_heap_without_healing(p);
237 }
238
239 Raw::store_in_heap(p, store_good(value));
240 }
241
242 template <DecoratorSet decorators, typename BarrierSetT>
243 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_store_in_heap_at(oop base, ptrdiff_t offset, oop value) {
244 zpointer* const p = field_addr(base, offset);
245
246 if (is_store_barrier_no_keep_alive<decorators>(base, offset)) {
247 no_keep_alive_store_barrier_heap(p);
248 } else {
249 store_barrier_heap_without_healing(p);
250 }
251
252 Raw::store_in_heap(p, store_good(value));
253 }
254
255 template <DecoratorSet decorators, typename BarrierSetT>
256 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_store_not_in_heap(zpointer* p, oop value) {
257 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
258
259 if (!is_store_barrier_no_keep_alive<decorators>()) {
260 store_barrier_native_without_healing(p);
261 }
262
263 Raw::store(p, store_good(value));
264 }
265
266 template <DecoratorSet decorators, typename BarrierSetT>
267 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap(zpointer* p, oop compare_value, oop new_value) {
268 verify_decorators_present<ON_STRONG_OOP_REF>();
269 verify_decorators_absent<AS_NO_KEEPALIVE>();
270
271 store_barrier_heap_with_healing(p);
272
273 const zpointer o = Raw::atomic_cmpxchg_in_heap(p, store_good(compare_value), store_good(new_value));
274 assert_is_valid(o);
275
276 return to_oop(ZPointer::uncolor_store_good(o));
277 }
278
279 template <DecoratorSet decorators, typename BarrierSetT>
280 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap_at(oop base, ptrdiff_t offset, oop compare_value, oop new_value) {
281 verify_decorators_present<ON_STRONG_OOP_REF | ON_UNKNOWN_OOP_REF>();
282 verify_decorators_absent<AS_NO_KEEPALIVE>();
283
284 // Through Unsafe.CompareAndExchangeObject()/CompareAndSetObject() we can receive
285 // calls with ON_UNKNOWN_OOP_REF set. However, we treat these as ON_STRONG_OOP_REF,
286 // with the motivation that if you're doing Unsafe operations on a Reference.referent
287 // field, then you're on your own anyway.
288 zpointer* const p = field_addr(base, offset);
289
290 store_barrier_heap_with_healing(p);
291
292 const zpointer o = Raw::atomic_cmpxchg_in_heap(p, store_good(compare_value), store_good(new_value));
293 assert_is_valid(o);
294
295 return to_oop(ZPointer::uncolor_store_good(o));
296 }
297
298 template <DecoratorSet decorators, typename BarrierSetT>
299 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap(zpointer* p, oop new_value) {
300 verify_decorators_present<ON_STRONG_OOP_REF>();
301 verify_decorators_absent<AS_NO_KEEPALIVE>();
302
303 store_barrier_heap_with_healing(p);
304
305 const zpointer o = Raw::atomic_xchg_in_heap(p, store_good(new_value));
306 assert_is_valid(o);
307
308 return to_oop(ZPointer::uncolor_store_good(o));
309 }
310
311 template <DecoratorSet decorators, typename BarrierSetT>
312 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap_at(oop base, ptrdiff_t offset, oop new_value) {
313 verify_decorators_present<ON_STRONG_OOP_REF>();
314 verify_decorators_absent<AS_NO_KEEPALIVE>();
315
316 zpointer* const p = field_addr(base, offset);
317
318 store_barrier_heap_with_healing(p);
319
320 const zpointer o = Raw::atomic_xchg_in_heap(p, store_good(new_value));
321 assert_is_valid(o);
322
323 return to_oop(ZPointer::uncolor_store_good(o));
324 }
325
326 template <DecoratorSet decorators, typename BarrierSetT>
327 inline zaddress ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_copy_one_barriers(zpointer* dst, zpointer* src) {
328 store_barrier_heap_without_healing(dst);
329
330 return ZBarrierSet::load_barrier_on_oop_field(src);
331 }
332
333 template <DecoratorSet decorators, typename BarrierSetT>
334 inline OopCopyResult ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_copy_one(zpointer* dst, zpointer* src) {
335 const zaddress obj = oop_copy_one_barriers(dst, src);
336
337 if (HasDecorator<decorators, ARRAYCOPY_NOTNULL>::value && is_null(obj)) {
338 return OopCopyResult::failed_check_null;
339 }
340
341 AtomicAccess::store(dst, ZAddress::store_good(obj));
342
343 return OopCopyResult::ok;
344 }
345
346 template <DecoratorSet decorators, typename BarrierSetT>
347 inline OopCopyResult ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_copy_one_check_cast(zpointer* dst, zpointer* src, Klass* dst_klass) {
348 const zaddress obj = oop_copy_one_barriers(dst, src);
349
350 if (HasDecorator<decorators, ARRAYCOPY_NOTNULL>::value && is_null(obj)) {
351 return OopCopyResult::failed_check_null;
352 }
353
354 if (!oopDesc::is_instanceof_or_null(to_oop(obj), dst_klass)) {
355 // Check cast failed
356 return OopCopyResult::failed_check_class_cast;
357 }
358
359 AtomicAccess::store(dst, ZAddress::store_good(obj));
360
361 return OopCopyResult::ok;
362 }
363
364 template <DecoratorSet decorators, typename BarrierSetT>
365 inline OopCopyResult ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_arraycopy_in_heap_check_cast(zpointer* dst, zpointer* src, size_t length, Klass* dst_klass) {
366 // Check cast and copy each elements
367 for (const zpointer* const end = src + length; src < end; src++, dst++) {
368 const OopCopyResult result = oop_copy_one_check_cast(dst, src, dst_klass);
369 if (result != OopCopyResult::ok) {
370 return result;
371 }
372 }
373
374 return OopCopyResult::ok;
375 }
376
377 template <DecoratorSet decorators, typename BarrierSetT>
378 inline OopCopyResult ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_arraycopy_in_heap_no_check_cast(zpointer* dst, zpointer* src, size_t length) {
379 const bool is_disjoint = HasDecorator<decorators, ARRAYCOPY_DISJOINT>::value;
380
381 if (is_disjoint || src > dst) {
382 for (const zpointer* const end = src + length; src < end; src++, dst++) {
383 const OopCopyResult result = oop_copy_one(dst, src);
384 if (result != OopCopyResult::ok) {
385 return result;
386 }
387 }
388
389 return OopCopyResult::ok;
390 }
391
392 if (src < dst) {
393 const zpointer* const end = src;
394 src += length - 1;
395 dst += length - 1;
396 for ( ; src >= end; src--, dst--) {
397 const OopCopyResult result = oop_copy_one(dst, src);
398 if (result != OopCopyResult::ok) {
399 return result;
400 }
401 }
402
403 return OopCopyResult::ok;
404 }
405
406 // src and dst are the same; nothing to do
407 return OopCopyResult::ok;
408 }
409
410 template <DecoratorSet decorators, typename BarrierSetT>
411 inline OopCopyResult ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, zpointer* src_raw,
412 arrayOop dst_obj, size_t dst_offset_in_bytes, zpointer* dst_raw,
413 size_t length) {
414 zpointer* const src = arrayOopDesc::obj_offset_to_raw(src_obj, src_offset_in_bytes, src_raw);
415 zpointer* const dst = arrayOopDesc::obj_offset_to_raw(dst_obj, dst_offset_in_bytes, dst_raw);
416
417 if (HasDecorator<decorators, ARRAYCOPY_CHECKCAST>::value) {
418 Klass* const dst_klass = objArrayOop(dst_obj)->element_klass();
419 return oop_arraycopy_in_heap_check_cast(dst, src, length, dst_klass);
420 } else {
421 return oop_arraycopy_in_heap_no_check_cast(dst, src, length);
422 }
423 }
424
425 template <DecoratorSet decorators, typename BarrierSetT>
426 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::clone_in_heap(oop src, oop dst, size_t size) {
427 check_is_valid_zaddress(src);
428
429 if (dst->is_refArray()) {
430 // Cloning an object array is similar to performing array copy.
431 // If an array is large enough to have its allocation segmented,
432 // this operation might require GC barriers. However, the intrinsics
433 // for cloning arrays transform the clone to an optimized allocation
434 // and arraycopy sequence, so the performance of this runtime call
435 // does not matter for object arrays.
436 clone_obj_array(objArrayOop(src), objArrayOop(dst));
437 return;
438 }
439
440 // Fix the oops
441 ZBarrierSet::load_barrier_all(src, size);
442
443 // Clone the object
444 Raw::clone_in_heap(src, dst, size);
445
446 // Color store good before handing out
447 ZBarrierSet::color_store_good_all(dst, size);
448 }
449
450 static inline void copy_primitive_payload(const void* src, const void* dst, const size_t payload_size_bytes, size_t& copied_bytes) {
451 if (payload_size_bytes == 0) {
452 return;
453 }
454 void* src_payload = (void*)(address(src) + copied_bytes);
455 void* dst_payload = (void*)(address(dst) + copied_bytes);
456 Copy::copy_value_content(src_payload, dst_payload, payload_size_bytes);
457 copied_bytes += payload_size_bytes;
458 }
459
460 template <DecoratorSet decorators, typename BarrierSetT>
461 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::value_copy_in_heap(void* src, void* dst, InlineKlass* md, LayoutKind lk) {
462 if (md->contains_oops()) {
463 // Iterate over each oop map, performing:
464 // 1) possibly raw copy for any primitive payload before each map
465 // 2) load and store barrier for each oop
466 // 3) possibly raw copy for any primitive payload trailer
467
468 // src/dst may not be oops, need offset to adjust oop map offset
469 const address src_oop_addr_offset = ((address) src) - md->payload_offset();
470 OopMapBlock* map = md->start_of_nonstatic_oop_maps();
471 const OopMapBlock* const end = map + md->nonstatic_oop_map_count();
472 size_t size_in_bytes = md->layout_size_in_bytes(lk);
473 size_t copied_bytes = 0;
474 while (map != end) {
475 zpointer *src_p = (zpointer*)(src_oop_addr_offset + map->offset());
476 const uintptr_t oop_offset = uintptr_t(src_p) - uintptr_t(src);
477 zpointer *dst_p = (zpointer*)(uintptr_t(dst) + oop_offset);
478
479 // Copy any leading primitive payload before every cluster of oops
480 assert(copied_bytes < oop_offset || copied_bytes == oop_offset, "Negative sized leading payload segment");
481 copy_primitive_payload(src, dst, oop_offset - copied_bytes, copied_bytes);
482
483 // Copy a cluster of oops
484 for (const zpointer* const src_end = src_p + map->count(); src_p < src_end; src_p++, dst_p++) {
485 oop_copy_one(dst_p, src_p);
486 copied_bytes += sizeof(zpointer);
487 }
488 map++;
489 }
490
491 // Copy trailing primitive payload after potential oops
492 assert(copied_bytes < size_in_bytes || copied_bytes == size_in_bytes, "Negative sized trailing payload segment");
493 copy_primitive_payload(src, dst, size_in_bytes - copied_bytes, copied_bytes);
494 } else {
495 Raw::value_copy_in_heap(src, dst, md, lk);
496 }
497 }
498
499 //
500 // Not in heap
501 //
502 template <DecoratorSet decorators, typename BarrierSetT>
503 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_not_in_heap(zpointer* p) {
504 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
505
506 const zpointer o = Raw::template load<zpointer>(p);
507 assert_is_valid(o);
508 return to_oop(load_barrier(p, o));
509 }
510
511 template <DecoratorSet decorators, typename BarrierSetT>
512 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_not_in_heap(oop* p) {
513 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
514
515 return oop_load_not_in_heap((zpointer*)p);
516 }
517
518 template <DecoratorSet decorators, typename BarrierSetT>
519 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_not_in_heap(zpointer* p, oop compare_value, oop new_value) {
520 verify_decorators_present<ON_STRONG_OOP_REF>();
521 verify_decorators_absent<AS_NO_KEEPALIVE>();
522
523 store_barrier_native_with_healing(p);
524
525 const zpointer o = Raw::atomic_cmpxchg(p, store_good(compare_value), store_good(new_value));
526 assert_is_valid(o);
527
528 return to_oop(ZPointer::uncolor_store_good(o));
529 }
530
531 template <DecoratorSet decorators, typename BarrierSetT>
532 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_not_in_heap(zpointer* p, oop new_value) {
533 verify_decorators_present<ON_STRONG_OOP_REF>();
534 verify_decorators_absent<AS_NO_KEEPALIVE>();
535
536 store_barrier_native_with_healing(p);
537
538 const zpointer o = Raw::atomic_xchg(p, store_good(new_value));
539 assert_is_valid(o);
540
541 return to_oop(ZPointer::uncolor_store_good(o));
542 }
543
544 #endif // SHARE_GC_Z_ZBARRIERSET_INLINE_HPP