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/zAddress.hpp"
28 #include "gc/z/zBarrierSet.hpp"
29
30 #include "gc/shared/accessBarrierSupport.inline.hpp"
31 #include "gc/z/zAddress.inline.hpp"
32 #include "gc/z/zBarrier.inline.hpp"
33 #include "gc/z/zIterator.inline.hpp"
34 #include "gc/z/zNMethod.hpp"
35 #include "memory/iterator.inline.hpp"
36 #include "oops/inlineKlass.inline.hpp"
37 #include "utilities/debug.hpp"
38 #include "utilities/copy.hpp"
39
40 template <DecoratorSet decorators, typename BarrierSetT>
41 template <DecoratorSet expected>
42 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::verify_decorators_present() {
43 if ((decorators & expected) == 0) {
44 fatal("Using unsupported access decorators");
45 }
46 }
47
48 template <DecoratorSet decorators, typename BarrierSetT>
49 template <DecoratorSet expected>
50 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::verify_decorators_absent() {
51 if ((decorators & expected) != 0) {
52 fatal("Using unsupported access decorators");
53 }
54 }
55
56 template <DecoratorSet decorators, typename BarrierSetT>
57 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::unsupported() {
58 ShouldNotReachHere();
59 }
60
61 template <DecoratorSet decorators, typename BarrierSetT>
62 inline zpointer* ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::field_addr(oop base, ptrdiff_t offset) {
63 assert(base != nullptr, "Invalid base");
64 return reinterpret_cast<zpointer*>(reinterpret_cast<intptr_t>((void*)base) + offset);
65 }
66
67 template <DecoratorSet decorators, typename BarrierSetT>
68 inline zaddress ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::load_barrier(zpointer* p, zpointer o) {
69 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
70
71 if (HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
72 if (HasDecorator<decorators, ON_STRONG_OOP_REF>::value) {
73 // Load barriers on strong oop refs don't keep objects alive
74 return ZBarrier::load_barrier_on_oop_field_preloaded(p, o);
75 } else if (HasDecorator<decorators, ON_WEAK_OOP_REF>::value) {
76 return ZBarrier::no_keep_alive_load_barrier_on_weak_oop_field_preloaded(p, o);
77 } else {
78 assert((HasDecorator<decorators, ON_PHANTOM_OOP_REF>::value), "Must be");
79 return ZBarrier::no_keep_alive_load_barrier_on_phantom_oop_field_preloaded(p, o);
80 }
81 } else {
82 if (HasDecorator<decorators, ON_STRONG_OOP_REF>::value) {
83 return ZBarrier::load_barrier_on_oop_field_preloaded(p, o);
84 } else if (HasDecorator<decorators, ON_WEAK_OOP_REF>::value) {
85 return ZBarrier::load_barrier_on_weak_oop_field_preloaded(p, o);
86 } else {
87 assert((HasDecorator<decorators, ON_PHANTOM_OOP_REF>::value), "Must be");
88 return ZBarrier::load_barrier_on_phantom_oop_field_preloaded(p, o);
89 }
90 }
91 }
92
93 template <DecoratorSet decorators, typename BarrierSetT>
94 inline zaddress ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::load_barrier_on_unknown_oop_ref(oop base, ptrdiff_t offset, zpointer* p, zpointer o) {
95 verify_decorators_present<ON_UNKNOWN_OOP_REF>();
96
97 const DecoratorSet decorators_known_strength =
98 AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset);
99
100 if (HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
101 if (decorators_known_strength & ON_STRONG_OOP_REF) {
102 // Load barriers on strong oop refs don't keep objects alive
103 return ZBarrier::load_barrier_on_oop_field_preloaded(p, o);
104 } else if (decorators_known_strength & ON_WEAK_OOP_REF) {
105 return ZBarrier::no_keep_alive_load_barrier_on_weak_oop_field_preloaded(p, o);
106 } else {
107 assert(decorators_known_strength & ON_PHANTOM_OOP_REF, "Must be");
108 return ZBarrier::no_keep_alive_load_barrier_on_phantom_oop_field_preloaded(p, o);
109 }
110 } else {
111 if (decorators_known_strength & ON_STRONG_OOP_REF) {
112 return ZBarrier::load_barrier_on_oop_field_preloaded(p, o);
113 } else if (decorators_known_strength & ON_WEAK_OOP_REF) {
114 return ZBarrier::load_barrier_on_weak_oop_field_preloaded(p, o);
115 } else {
116 assert(decorators_known_strength & ON_PHANTOM_OOP_REF, "Must be");
117 return ZBarrier::load_barrier_on_phantom_oop_field_preloaded(p, o);
118 }
119 }
120 }
121
122 inline zpointer ZBarrierSet::store_good(oop obj) {
123 assert(ZPointerStoreGoodMask != 0, "sanity");
124
125 const zaddress addr = to_zaddress(obj);
126 return ZAddress::store_good(addr);
127 }
128
129 template <DecoratorSet decorators, typename BarrierSetT>
130 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::store_barrier_heap_with_healing(zpointer* p) {
131 if (!HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value) {
132 ZBarrier::store_barrier_on_heap_oop_field(p, true /* heal */);
133 } else {
134 assert(false, "Should not be used on uninitialized memory");
135 }
136 }
137
138 template <DecoratorSet decorators, typename BarrierSetT>
139 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::store_barrier_heap_without_healing(zpointer* p) {
140 if (!HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value) {
141 ZBarrier::store_barrier_on_heap_oop_field(p, false /* heal */);
142 }
143 }
144
145 template <DecoratorSet decorators, typename BarrierSetT>
146 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::no_keep_alive_store_barrier_heap(zpointer* p) {
147 if (!HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value) {
148 ZBarrier::no_keep_alive_store_barrier_on_heap_oop_field(p);
149 }
150 }
151
152 template <DecoratorSet decorators, typename BarrierSetT>
153 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::store_barrier_native_with_healing(zpointer* p) {
154 if (!HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value) {
155 ZBarrier::store_barrier_on_native_oop_field(p, true /* heal */);
156 } else {
157 assert(false, "Should not be used on uninitialized memory");
158 }
159 }
160
161 template <DecoratorSet decorators, typename BarrierSetT>
162 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::store_barrier_native_without_healing(zpointer* p) {
163 if (!HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value) {
164 ZBarrier::store_barrier_on_native_oop_field(p, false /* heal */);
165 }
166 }
167
168 //
169 // In heap
170 //
171 template <DecoratorSet decorators, typename BarrierSetT>
172 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_in_heap(zpointer* p) {
173 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
174
175 const zpointer o = Raw::load_in_heap(p);
176 assert_is_valid(o);
177
178 return to_oop(load_barrier(p, o));
179 }
180
181 template <DecoratorSet decorators, typename BarrierSetT>
182 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_in_heap_at(oop base, ptrdiff_t offset) {
183 zpointer* const p = field_addr(base, offset);
184
185 const zpointer o = Raw::load_in_heap(p);
186 assert_is_valid(o);
187
188 if (HasDecorator<decorators, ON_UNKNOWN_OOP_REF>::value) {
189 return to_oop(load_barrier_on_unknown_oop_ref(base, offset, p, o));
190 }
191
192 return to_oop(load_barrier(p, o));
193 }
194
195 template <DecoratorSet decorators>
196 bool is_store_barrier_no_keep_alive() {
197 if (HasDecorator<decorators, ON_STRONG_OOP_REF>::value) {
198 return HasDecorator<decorators, AS_NO_KEEPALIVE>::value;
199 }
200
201 if (HasDecorator<decorators, ON_WEAK_OOP_REF>::value) {
202 return true;
203 }
204
205 assert((decorators & ON_PHANTOM_OOP_REF) != 0, "Must be");
206 return true;
207 }
208
209 template <DecoratorSet decorators>
210 inline bool is_store_barrier_no_keep_alive(oop base, ptrdiff_t offset) {
211 if (!HasDecorator<decorators, ON_UNKNOWN_OOP_REF>::value) {
212 return is_store_barrier_no_keep_alive<decorators>();
213 }
214
215 const DecoratorSet decorators_known_strength =
216 AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset);
217
218 if ((decorators_known_strength & ON_STRONG_OOP_REF) != 0) {
219 return (decorators & AS_NO_KEEPALIVE) != 0;
220 }
221
222 if ((decorators_known_strength & ON_WEAK_OOP_REF) != 0) {
223 return true;
224 }
225
226 assert((decorators_known_strength & ON_PHANTOM_OOP_REF) != 0, "Must be");
227 return true;
228 }
229
230 template <DecoratorSet decorators, typename BarrierSetT>
231 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_store_in_heap(zpointer* p, oop value) {
232 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
233
234 if (is_store_barrier_no_keep_alive<decorators>()) {
235 no_keep_alive_store_barrier_heap(p);
236 } else {
237 store_barrier_heap_without_healing(p);
238 }
239
240 Raw::store_in_heap(p, store_good(value));
241 }
242
243 template <DecoratorSet decorators, typename BarrierSetT>
244 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_store_in_heap_at(oop base, ptrdiff_t offset, oop value) {
245 zpointer* const p = field_addr(base, offset);
246
247 if (is_store_barrier_no_keep_alive<decorators>(base, offset)) {
248 no_keep_alive_store_barrier_heap(p);
249 } else {
250 store_barrier_heap_without_healing(p);
251 }
252
253 Raw::store_in_heap(p, store_good(value));
254 }
255
256 template <DecoratorSet decorators, typename BarrierSetT>
257 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_store_not_in_heap(zpointer* p, oop value) {
258 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
259
260 if (!is_store_barrier_no_keep_alive<decorators>()) {
261 store_barrier_native_without_healing(p);
262 }
263
264 Raw::store(p, store_good(value));
265 }
266
267 template <DecoratorSet decorators, typename BarrierSetT>
268 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap(zpointer* p, oop compare_value, oop new_value) {
269 verify_decorators_present<ON_STRONG_OOP_REF>();
270 verify_decorators_absent<AS_NO_KEEPALIVE>();
271
272 store_barrier_heap_with_healing(p);
273
274 const zpointer o = Raw::atomic_cmpxchg_in_heap(p, store_good(compare_value), store_good(new_value));
275 assert_is_valid(o);
276
277 return to_oop(ZPointer::uncolor_store_good(o));
278 }
279
280 template <DecoratorSet decorators, typename BarrierSetT>
281 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap_at(oop base, ptrdiff_t offset, oop compare_value, oop new_value) {
282 verify_decorators_present<ON_STRONG_OOP_REF | ON_UNKNOWN_OOP_REF>();
283 verify_decorators_absent<AS_NO_KEEPALIVE>();
284
285 // Through Unsafe.CompareAndExchangeObject()/CompareAndSetObject() we can receive
286 // calls with ON_UNKNOWN_OOP_REF set. However, we treat these as ON_STRONG_OOP_REF,
287 // with the motivation that if you're doing Unsafe operations on a Reference.referent
288 // field, then you're on your own anyway.
289 zpointer* const p = field_addr(base, offset);
290
291 store_barrier_heap_with_healing(p);
292
293 const zpointer o = Raw::atomic_cmpxchg_in_heap(p, store_good(compare_value), store_good(new_value));
294 assert_is_valid(o);
295
296 return to_oop(ZPointer::uncolor_store_good(o));
297 }
298
299 template <DecoratorSet decorators, typename BarrierSetT>
300 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap(zpointer* p, oop new_value) {
301 verify_decorators_present<ON_STRONG_OOP_REF>();
302 verify_decorators_absent<AS_NO_KEEPALIVE>();
303
304 store_barrier_heap_with_healing(p);
305
306 const zpointer o = Raw::atomic_xchg_in_heap(p, store_good(new_value));
307 assert_is_valid(o);
308
309 return to_oop(ZPointer::uncolor_store_good(o));
310 }
311
312 template <DecoratorSet decorators, typename BarrierSetT>
313 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap_at(oop base, ptrdiff_t offset, oop new_value) {
314 verify_decorators_present<ON_STRONG_OOP_REF>();
315 verify_decorators_absent<AS_NO_KEEPALIVE>();
316
317 zpointer* const p = field_addr(base, offset);
318
319 store_barrier_heap_with_healing(p);
320
321 const zpointer o = Raw::atomic_xchg_in_heap(p, store_good(new_value));
322 assert_is_valid(o);
323
324 return to_oop(ZPointer::uncolor_store_good(o));
325 }
326
327 template <DecoratorSet decorators, typename BarrierSetT>
328 inline zaddress ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_copy_one_barriers(zpointer* dst, zpointer* src) {
329 store_barrier_heap_without_healing(dst);
330
331 return ZBarrier::load_barrier_on_oop_field(src);
332 }
333
334 template <DecoratorSet decorators, typename BarrierSetT>
335 inline ZBarrierSet::OopCopyCheckStatus ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_copy_one(zpointer* dst, zpointer* src) {
336 const zaddress obj = oop_copy_one_barriers(dst, src);
337
338 if (HasDecorator<decorators, ARRAYCOPY_NOTNULL>::value && is_null(obj)) {
339 return oop_copy_check_null;
340 }
341
342 Atomic::store(dst, ZAddress::store_good(obj));
343 return oop_copy_check_ok;
344 }
345
346 template <DecoratorSet decorators, typename BarrierSetT>
347 inline ZBarrierSet::OopCopyCheckStatus 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 const bool null_check = HasDecorator<decorators, ARRAYCOPY_NOTNULL>::value;
350
351 if (null_check && is_null(obj)) {
352 return oop_copy_check_null;
353 }
354 else if (!oopDesc::is_instanceof_or_null(to_oop(obj), dst_klass)) {
355 // Check cast failed
356 return oop_copy_check_class_cast;
357 }
358
359 Atomic::store(dst, ZAddress::store_good(obj));
360
361 return oop_copy_check_ok;
362 }
363
364
365 template <DecoratorSet decorators, typename BarrierSetT>
366 inline ZBarrierSet::OopCopyCheckStatus ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_arraycopy_in_heap_check_cast(zpointer* dst, zpointer* src, size_t length, Klass* dst_klass) {
367 // Check cast and copy each elements
368 OopCopyCheckStatus check_status = oop_copy_check_ok;
369 for (const zpointer* const end = src + length; (check_status == oop_copy_check_ok) && (src < end); src++, dst++) {
370 check_status = oop_copy_one_check_cast(dst, src, dst_klass);
371 }
372 return check_status;
373 }
374
375 template <DecoratorSet decorators, typename BarrierSetT>
376 inline ZBarrierSet::OopCopyCheckStatus ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_arraycopy_in_heap_no_check_cast(zpointer* dst, zpointer* src, size_t length) {
377 const bool is_disjoint = HasDecorator<decorators, ARRAYCOPY_DISJOINT>::value;
378 OopCopyCheckStatus check_status = oop_copy_check_ok;
379 if (is_disjoint || src > dst) {
380 for (const zpointer* const end = src + length; (check_status == oop_copy_check_ok) && (src < end); src++, dst++) {
381 check_status = oop_copy_one(dst, src);
382 }
383 return check_status;
384 }
385
386 if (src < dst) {
387 const zpointer* const end = src;
388 src += length - 1;
389 dst += length - 1;
390 for ( ; (check_status == oop_copy_check_ok) && (src >= end); src--, dst--) {
391 check_status = oop_copy_one(dst, src);
392 }
393 return check_status;
394 }
395
396 // src and dst are the same; nothing to do
397 return check_status;
398 }
399
400 template <DecoratorSet decorators, typename BarrierSetT>
401 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, zpointer* src_raw,
402 arrayOop dst_obj, size_t dst_offset_in_bytes, zpointer* dst_raw,
403 size_t length) {
404 zpointer* const src = arrayOopDesc::obj_offset_to_raw(src_obj, src_offset_in_bytes, src_raw);
405 zpointer* const dst = arrayOopDesc::obj_offset_to_raw(dst_obj, dst_offset_in_bytes, dst_raw);
406 OopCopyCheckStatus check_status;
407
408 if (HasDecorator<decorators, ARRAYCOPY_CHECKCAST>::value) {
409 Klass* const dst_klass = objArrayOop(dst_obj)->element_klass();
410 check_status = oop_arraycopy_in_heap_check_cast(dst, src, length, dst_klass);
411 } else {
412 check_status = oop_arraycopy_in_heap_no_check_cast(dst, src, length);
413 }
414
415 switch (check_status) {
416 case oop_copy_check_ok:
417 return;
418 case oop_copy_check_class_cast:
419 throw_array_store_exception(src_obj, dst_obj, JavaThread::current());
420 break;
421 case oop_copy_check_null:
422 throw_array_null_pointer_store_exception(src_obj, dst_obj, JavaThread::current());
423 break;
424 default:
425 ShouldNotReachHere();
426 return;
427 }
428 }
429
430 class ZColorStoreGoodOopClosure : public BasicOopIterateClosure {
431 public:
432 virtual void do_oop(oop* p_) {
433 volatile zpointer* const p = (volatile zpointer*)p_;
434 const zpointer ptr = ZBarrier::load_atomic(p);
435 const zaddress addr = ZPointer::uncolor(ptr);
436 Atomic::store(p, ZAddress::store_good(addr));
437 }
438
439 virtual void do_oop(narrowOop* p) {
440 ShouldNotReachHere();
441 }
442 };
443
444 class ZLoadBarrierOopClosure : public BasicOopIterateClosure {
445 public:
446 virtual void do_oop(oop* p) {
447 ZBarrier::load_barrier_on_oop_field((zpointer*)p);
448 }
449
450 virtual void do_oop(narrowOop* p) {
451 ShouldNotReachHere();
452 }
453 };
454
455 template <DecoratorSet decorators, typename BarrierSetT>
456 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::clone_in_heap(oop src, oop dst, size_t size) {
457 check_is_valid_zaddress(src);
458
459 if (dst->is_objArray()) {
460 // Cloning an object array is similar to performing array copy.
461 // If an array is large enough to have its allocation segmented,
462 // this operation might require GC barriers. However, the intrinsics
463 // for cloning arrays transform the clone to an optimized allocation
464 // and arraycopy sequence, so the performance of this runtime call
465 // does not matter for object arrays.
466 clone_obj_array(objArrayOop(src), objArrayOop(dst));
467 return;
468 }
469
470 // Fix the oops
471 ZLoadBarrierOopClosure cl;
472 ZIterator::oop_iterate(src, &cl);
473
474 // Clone the object
475 Raw::clone_in_heap(src, dst, size);
476
477 assert(dst->is_typeArray() || ZHeap::heap()->is_young(to_zaddress(dst)), "ZColorStoreGoodOopClosure is only valid for young objects");
478
479 // Color store good before handing out
480 ZColorStoreGoodOopClosure cl_sg;
481 ZIterator::oop_iterate(dst, &cl_sg);
482 }
483
484 static inline void copy_primitive_payload(const void* src, const void* dst, const size_t payload_size_bytes, size_t& copied_bytes) {
485 if (payload_size_bytes == 0) {
486 return;
487 }
488 void* src_payload = (void*)(address(src) + copied_bytes);
489 void* dst_payload = (void*)(address(dst) + copied_bytes);
490 Copy::copy_value_content(src_payload, dst_payload, payload_size_bytes);
491 copied_bytes += payload_size_bytes;
492 }
493
494 template <DecoratorSet decorators, typename BarrierSetT>
495 inline void ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::value_copy_in_heap(void* src, void* dst, InlineKlass* md, LayoutKind lk) {
496 if (md->contains_oops()) {
497 // Iterate over each oop map, performing:
498 // 1) possibly raw copy for any primitive payload before each map
499 // 2) load and store barrier for each oop
500 // 3) possibly raw copy for any primitive payload trailer
501
502 // src/dst may not be oops, need offset to adjust oop map offset
503 const address src_oop_addr_offset = ((address) src) - md->payload_offset();
504 OopMapBlock* map = md->start_of_nonstatic_oop_maps();
505 const OopMapBlock* const end = map + md->nonstatic_oop_map_count();
506 size_t size_in_bytes = md->layout_size_in_bytes(lk);
507 size_t copied_bytes = 0;
508 while (map != end) {
509 zpointer *src_p = (zpointer*)(src_oop_addr_offset + map->offset());
510 const uintptr_t oop_offset = uintptr_t(src_p) - uintptr_t(src);
511 zpointer *dst_p = (zpointer*)(uintptr_t(dst) + oop_offset);
512
513 // Copy any leading primitive payload before every cluster of oops
514 assert(copied_bytes < oop_offset || copied_bytes == oop_offset, "Negative sized leading payload segment");
515 copy_primitive_payload(src, dst, oop_offset - copied_bytes, copied_bytes);
516
517 // Copy a cluster of oops
518 for (const zpointer* const src_end = src_p + map->count(); src_p < src_end; src_p++, dst_p++) {
519 oop_copy_one(dst_p, src_p);
520 copied_bytes += sizeof(zpointer);
521 }
522 map++;
523 }
524
525 // Copy trailing primitive payload after potential oops
526 assert(copied_bytes < size_in_bytes || copied_bytes == size_in_bytes, "Negative sized trailing payload segment");
527 copy_primitive_payload(src, dst, size_in_bytes - copied_bytes, copied_bytes);
528 } else {
529 Raw::value_copy_in_heap(src, dst, md, lk);
530 }
531 }
532
533 //
534 // Not in heap
535 //
536 template <DecoratorSet decorators, typename BarrierSetT>
537 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_not_in_heap(zpointer* p) {
538 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
539
540 const zpointer o = Raw::template load<zpointer>(p);
541 assert_is_valid(o);
542 return to_oop(load_barrier(p, o));
543 }
544
545 template <DecoratorSet decorators, typename BarrierSetT>
546 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_not_in_heap(oop* p) {
547 verify_decorators_absent<ON_UNKNOWN_OOP_REF>();
548
549 return oop_load_not_in_heap((zpointer*)p);
550 }
551
552 template <DecoratorSet decorators, typename BarrierSetT>
553 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_not_in_heap(zpointer* p, oop compare_value, oop new_value) {
554 verify_decorators_present<ON_STRONG_OOP_REF>();
555 verify_decorators_absent<AS_NO_KEEPALIVE>();
556
557 store_barrier_native_with_healing(p);
558
559 const zpointer o = Raw::atomic_cmpxchg(p, store_good(compare_value), store_good(new_value));
560 assert_is_valid(o);
561
562 return to_oop(ZPointer::uncolor_store_good(o));
563 }
564
565 template <DecoratorSet decorators, typename BarrierSetT>
566 inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_not_in_heap(zpointer* p, oop new_value) {
567 verify_decorators_present<ON_STRONG_OOP_REF>();
568 verify_decorators_absent<AS_NO_KEEPALIVE>();
569
570 store_barrier_native_with_healing(p);
571
572 const zpointer o = Raw::atomic_xchg(p, store_good(new_value));
573 assert_is_valid(o);
574
575 return to_oop(ZPointer::uncolor_store_good(o));
576 }
577
578 #endif // SHARE_GC_Z_ZBARRIERSET_INLINE_HPP