1 /*
2 * Copyright (c) 1997, 2023, 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
25 #include "precompiled.hpp"
26 #include "asm/codeBuffer.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "memory/resourceArea.hpp"
29 #include "oops/access.inline.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "prims/vectorSupport.hpp"
32 #include "runtime/continuation.hpp"
33 #include "runtime/interfaceSupport.inline.hpp"
34 #include "runtime/timerTrace.hpp"
35 #include "runtime/sharedRuntime.hpp"
36 #include "runtime/stubRoutines.hpp"
37 #include "utilities/align.hpp"
38 #include "utilities/copy.hpp"
39 #ifdef COMPILER2
40 #include "opto/runtime.hpp"
41 #endif
42
43 UnsafeCopyMemory* UnsafeCopyMemory::_table = nullptr;
44 int UnsafeCopyMemory::_table_length = 0;
45 int UnsafeCopyMemory::_table_max_length = 0;
46 address UnsafeCopyMemory::_common_exit_stub_pc = nullptr;
47
48 // Implementation of StubRoutines - for a description
49 // of how to extend it, see the header file.
50
51 // Class Variables
52
53 BufferBlob* StubRoutines::_initial_stubs_code = nullptr;
54 BufferBlob* StubRoutines::_final_stubs_code = nullptr;
55 BufferBlob* StubRoutines::_compiler_stubs_code = nullptr;
56 BufferBlob* StubRoutines::_continuation_stubs_code = nullptr;
57
58 address StubRoutines::_call_stub_return_address = nullptr;
59 address StubRoutines::_call_stub_entry = nullptr;
60
61 address StubRoutines::_catch_exception_entry = nullptr;
62 address StubRoutines::_forward_exception_entry = nullptr;
63 address StubRoutines::_throw_AbstractMethodError_entry = nullptr;
64 address StubRoutines::_throw_IncompatibleClassChangeError_entry = nullptr;
65 address StubRoutines::_throw_NullPointerException_at_call_entry = nullptr;
66 address StubRoutines::_throw_StackOverflowError_entry = nullptr;
67 address StubRoutines::_throw_delayed_StackOverflowError_entry = nullptr;
68 jint StubRoutines::_verify_oop_count = 0;
69 address StubRoutines::_verify_oop_subroutine_entry = nullptr;
70 address StubRoutines::_atomic_xchg_entry = nullptr;
71 address StubRoutines::_atomic_cmpxchg_entry = nullptr;
72 address StubRoutines::_atomic_cmpxchg_long_entry = nullptr;
73 address StubRoutines::_atomic_add_entry = nullptr;
74 address StubRoutines::_fence_entry = nullptr;
75
76 // Compiled code entry points default values
77 // The default functions don't have separate disjoint versions.
78 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
79 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
80 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
81 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
82 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
83 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
84 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
85 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
86 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
87 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
88 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
89 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
90
91 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
92 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
93 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
94 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
95 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
96 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
97 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
98 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
99 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
100 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
101 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
102 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
103
104 address StubRoutines::_data_cache_writeback = nullptr;
105 address StubRoutines::_data_cache_writeback_sync = nullptr;
106
107 address StubRoutines::_checkcast_arraycopy = nullptr;
108 address StubRoutines::_checkcast_arraycopy_uninit = nullptr;
109 address StubRoutines::_unsafe_arraycopy = nullptr;
110 address StubRoutines::_generic_arraycopy = nullptr;
111
112 address StubRoutines::_jbyte_fill;
113 address StubRoutines::_jshort_fill;
114 address StubRoutines::_jint_fill;
115 address StubRoutines::_arrayof_jbyte_fill;
116 address StubRoutines::_arrayof_jshort_fill;
117 address StubRoutines::_arrayof_jint_fill;
118
119 address StubRoutines::_aescrypt_encryptBlock = nullptr;
120 address StubRoutines::_aescrypt_decryptBlock = nullptr;
121 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = nullptr;
122 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = nullptr;
123 address StubRoutines::_electronicCodeBook_encryptAESCrypt = nullptr;
124 address StubRoutines::_electronicCodeBook_decryptAESCrypt = nullptr;
125 address StubRoutines::_counterMode_AESCrypt = nullptr;
126 address StubRoutines::_galoisCounterMode_AESCrypt = nullptr;
127 address StubRoutines::_ghash_processBlocks = nullptr;
128 address StubRoutines::_chacha20Block = nullptr;
129 address StubRoutines::_base64_encodeBlock = nullptr;
130 address StubRoutines::_base64_decodeBlock = nullptr;
131 address StubRoutines::_poly1305_processBlocks = nullptr;
132
133 address StubRoutines::_md5_implCompress = nullptr;
134 address StubRoutines::_md5_implCompressMB = nullptr;
135 address StubRoutines::_sha1_implCompress = nullptr;
136 address StubRoutines::_sha1_implCompressMB = nullptr;
137 address StubRoutines::_sha256_implCompress = nullptr;
138 address StubRoutines::_sha256_implCompressMB = nullptr;
139 address StubRoutines::_sha512_implCompress = nullptr;
140 address StubRoutines::_sha512_implCompressMB = nullptr;
141 address StubRoutines::_sha3_implCompress = nullptr;
142 address StubRoutines::_sha3_implCompressMB = nullptr;
143
144 address StubRoutines::_updateBytesCRC32 = nullptr;
145 address StubRoutines::_crc_table_adr = nullptr;
146
147 address StubRoutines::_crc32c_table_addr = nullptr;
148 address StubRoutines::_updateBytesCRC32C = nullptr;
149 address StubRoutines::_updateBytesAdler32 = nullptr;
150
151 address StubRoutines::_multiplyToLen = nullptr;
152 address StubRoutines::_squareToLen = nullptr;
153 address StubRoutines::_mulAdd = nullptr;
154 address StubRoutines::_montgomeryMultiply = nullptr;
155 address StubRoutines::_montgomerySquare = nullptr;
156 address StubRoutines::_bigIntegerRightShiftWorker = nullptr;
157 address StubRoutines::_bigIntegerLeftShiftWorker = nullptr;
158
159 address StubRoutines::_vectorizedMismatch = nullptr;
160
161 address StubRoutines::_dexp = nullptr;
162 address StubRoutines::_dlog = nullptr;
163 address StubRoutines::_dlog10 = nullptr;
164 address StubRoutines::_fmod = nullptr;
165 address StubRoutines::_dpow = nullptr;
166 address StubRoutines::_dsin = nullptr;
167 address StubRoutines::_dcos = nullptr;
168 address StubRoutines::_dlibm_sin_cos_huge = nullptr;
169 address StubRoutines::_dlibm_reduce_pi04l = nullptr;
170 address StubRoutines::_dlibm_tan_cot_huge = nullptr;
171 address StubRoutines::_dtan = nullptr;
172
173 address StubRoutines::_f2hf = nullptr;
174 address StubRoutines::_hf2f = nullptr;
175
176 address StubRoutines::_vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}};
177 address StubRoutines::_vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}};
178
179 address StubRoutines::_method_entry_barrier = nullptr;
180 address StubRoutines::_array_sort = nullptr;
181 address StubRoutines::_array_partition = nullptr;
182
183 address StubRoutines::_cont_thaw = nullptr;
184 address StubRoutines::_cont_returnBarrier = nullptr;
185 address StubRoutines::_cont_returnBarrierExc = nullptr;
186 address StubRoutines::_cont_preempt_stub = nullptr;
187 address StubRoutines::_cont_preempt_monitorenter_redo = nullptr;
188 address StubRoutines::_cont_preempt_rerun_compiler_adapter = nullptr;
189
190 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_write_checkpoint_stub = nullptr;)
191 JFR_ONLY(address StubRoutines::_jfr_write_checkpoint = nullptr;)
192 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_return_lease_stub = nullptr;)
193 JFR_ONLY(address StubRoutines::_jfr_return_lease = nullptr;)
194
195 address StubRoutines::_upcall_stub_exception_handler = nullptr;
196
197 // Initialization
198 //
199 // Note: to break cycle with universe initialization, stubs are generated in two phases.
200 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
201 // The second phase includes all other stubs (which may depend on universe being initialized.)
202
203 extern void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind); // only interface to generators
204
205 void UnsafeCopyMemory::create_table(int max_size) {
206 UnsafeCopyMemory::_table = new UnsafeCopyMemory[max_size];
207 UnsafeCopyMemory::_table_max_length = max_size;
208 }
209
210 bool UnsafeCopyMemory::contains_pc(address pc) {
211 for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) {
212 UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i];
213 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
214 return true;
215 }
216 }
217 return false;
218 }
219
220 address UnsafeCopyMemory::page_error_continue_pc(address pc) {
221 for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) {
222 UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i];
223 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
224 return entry->error_exit_pc();
225 }
226 }
227 return nullptr;
228 }
229
230
231 static BufferBlob* initialize_stubs(StubCodeGenerator::StubsKind kind,
232 int code_size, int max_aligned_stubs,
233 const char* timer_msg,
234 const char* buffer_name,
235 const char* assert_msg) {
236 ResourceMark rm;
237 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime));
238 // Add extra space for large CodeEntryAlignment
239 int size = code_size + CodeEntryAlignment * max_aligned_stubs;
240 BufferBlob* stubs_code = BufferBlob::create(buffer_name, size);
241 if (stubs_code == nullptr) {
242 vm_exit_out_of_memory(code_size, OOM_MALLOC_ERROR, "CodeCache: no room for %s", buffer_name);
243 }
244 CodeBuffer buffer(stubs_code);
245 StubGenerator_generate(&buffer, kind);
246 // When new stubs added we need to make sure there is some space left
247 // to catch situation when we should increase size again.
248 assert(code_size == 0 || buffer.insts_remaining() > 200, "increase %s", assert_msg);
249
250 LogTarget(Info, stubs) lt;
251 if (lt.is_enabled()) {
252 LogStream ls(lt);
253 ls.print_cr("%s\t [" INTPTR_FORMAT ", " INTPTR_FORMAT "] used: %d, free: %d",
254 buffer_name, p2i(stubs_code->content_begin()), p2i(stubs_code->content_end()),
255 buffer.total_content_size(), buffer.insts_remaining());
256 }
257 return stubs_code;
258 }
259
260 void StubRoutines::initialize_initial_stubs() {
261 if (_initial_stubs_code == nullptr) {
262 _initial_stubs_code = initialize_stubs(StubCodeGenerator::Initial_stubs,
263 _initial_stubs_code_size, 10,
264 "StubRoutines generation initial stubs",
265 "StubRoutines (initial stubs)",
266 "_initial_stubs_code_size");
267 }
268 }
269
270 void StubRoutines::initialize_continuation_stubs() {
271 if (_continuation_stubs_code == nullptr) {
272 _continuation_stubs_code = initialize_stubs(StubCodeGenerator::Continuation_stubs,
273 _continuation_stubs_code_size, 10,
274 "StubRoutines generation continuation stubs",
275 "StubRoutines (continuation stubs)",
276 "_continuation_stubs_code_size");
277 }
278 }
279
280 void StubRoutines::initialize_compiler_stubs() {
281 if (_compiler_stubs_code == nullptr) {
282 _compiler_stubs_code = initialize_stubs(StubCodeGenerator::Compiler_stubs,
283 _compiler_stubs_code_size, 100,
284 "StubRoutines generation compiler stubs",
285 "StubRoutines (compiler stubs)",
286 "_compiler_stubs_code_size");
287 }
288 }
289
290 void StubRoutines::initialize_final_stubs() {
291 if (_final_stubs_code == nullptr) {
292 _final_stubs_code = initialize_stubs(StubCodeGenerator::Final_stubs,
293 _final_stubs_code_size, 10,
294 "StubRoutines generation final stubs",
295 "StubRoutines (final stubs)",
296 "_final_stubs_code_size");
297 }
298 }
299
300 void initial_stubs_init() { StubRoutines::initialize_initial_stubs(); }
301 void continuation_stubs_init() { StubRoutines::initialize_continuation_stubs(); }
302 void final_stubs_init() { StubRoutines::initialize_final_stubs(); }
303
304 void compiler_stubs_init(bool in_compiler_thread) {
305 if (in_compiler_thread && DelayCompilerStubsGeneration) {
306 // Temporarily revert state of stubs generation because
307 // it is called after final_stubs_init() finished
308 // during compiler runtime initialization.
309 // It is fine because these stubs are only used by
310 // compiled code and compiler is not running yet.
311 StubCodeDesc::unfreeze();
312 StubRoutines::initialize_compiler_stubs();
313 StubCodeDesc::freeze();
314 } else if (!in_compiler_thread && !DelayCompilerStubsGeneration) {
315 StubRoutines::initialize_compiler_stubs();
316 }
317 }
318
319 //
320 // Default versions of arraycopy functions
321 //
322
323 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
324 #ifndef PRODUCT
325 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
326 #endif // !PRODUCT
327 Copy::conjoint_jbytes_atomic(src, dest, count);
328 JRT_END
329
330 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
331 #ifndef PRODUCT
332 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
333 #endif // !PRODUCT
334 Copy::conjoint_jshorts_atomic(src, dest, count);
335 JRT_END
336
337 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
338 #ifndef PRODUCT
339 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
340 #endif // !PRODUCT
341 Copy::conjoint_jints_atomic(src, dest, count);
342 JRT_END
343
344 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
345 #ifndef PRODUCT
346 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy
347 #endif // !PRODUCT
348 Copy::conjoint_jlongs_atomic(src, dest, count);
349 JRT_END
350
351 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
352 #ifndef PRODUCT
353 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
354 #endif // !PRODUCT
355 assert(count != 0, "count should be non-zero");
356 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
357 JRT_END
358
359 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
360 #ifndef PRODUCT
361 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
362 #endif // !PRODUCT
363 assert(count != 0, "count should be non-zero");
364 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
365 JRT_END
366
367 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
368 #ifndef PRODUCT
369 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
370 #endif // !PRODUCT
371 Copy::arrayof_conjoint_jbytes(src, dest, count);
372 JRT_END
373
374 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
375 #ifndef PRODUCT
376 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
377 #endif // !PRODUCT
378 Copy::arrayof_conjoint_jshorts(src, dest, count);
379 JRT_END
380
381 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
382 #ifndef PRODUCT
383 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
384 #endif // !PRODUCT
385 Copy::arrayof_conjoint_jints(src, dest, count);
386 JRT_END
387
388 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
389 #ifndef PRODUCT
390 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy
391 #endif // !PRODUCT
392 Copy::arrayof_conjoint_jlongs(src, dest, count);
393 JRT_END
394
395 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
396 #ifndef PRODUCT
397 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
398 #endif // !PRODUCT
399 assert(count != 0, "count should be non-zero");
400 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count);
401 JRT_END
402
403 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
404 #ifndef PRODUCT
405 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
406 #endif // !PRODUCT
407 assert(count != 0, "count should be non-zero");
408 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count);
409 JRT_END
410
411 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
412 #define RETURN_STUB(xxx_fill) { \
413 name = #xxx_fill; \
414 return StubRoutines::xxx_fill(); }
415
416 switch (t) {
417 case T_BYTE:
418 case T_BOOLEAN:
419 if (!aligned) RETURN_STUB(jbyte_fill);
420 RETURN_STUB(arrayof_jbyte_fill);
421 case T_CHAR:
422 case T_SHORT:
423 if (!aligned) RETURN_STUB(jshort_fill);
424 RETURN_STUB(arrayof_jshort_fill);
425 case T_INT:
426 case T_FLOAT:
427 if (!aligned) RETURN_STUB(jint_fill);
428 RETURN_STUB(arrayof_jint_fill);
429 case T_DOUBLE:
430 case T_LONG:
431 case T_ARRAY:
432 case T_OBJECT:
433 case T_NARROWOOP:
434 case T_NARROWKLASS:
435 case T_ADDRESS:
436 case T_VOID:
437 // Currently unsupported
438 return nullptr;
439
440 default:
441 ShouldNotReachHere();
442 return nullptr;
443 }
444
445 #undef RETURN_STUB
446 }
447
448 // constants for computing the copy function
449 enum {
450 COPYFUNC_UNALIGNED = 0,
451 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
452 COPYFUNC_CONJOINT = 0,
453 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
454 };
455
456 // Note: The condition "disjoint" applies also for overlapping copies
457 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
458 address
459 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
460 int selector =
461 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
462 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
463
464 #define RETURN_STUB(xxx_arraycopy) { \
465 name = #xxx_arraycopy; \
466 return StubRoutines::xxx_arraycopy(); }
467
468 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
469 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \
470 return StubRoutines::xxx_arraycopy(parm); }
471
472 switch (t) {
473 case T_BYTE:
474 case T_BOOLEAN:
475 switch (selector) {
476 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
477 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
478 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
479 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
480 }
481 case T_CHAR:
482 case T_SHORT:
483 switch (selector) {
484 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
485 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
486 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
487 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
488 }
489 case T_INT:
490 case T_FLOAT:
491 switch (selector) {
492 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
493 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
494 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
495 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
496 }
497 case T_DOUBLE:
498 case T_LONG:
499 switch (selector) {
500 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
501 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
502 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
503 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
504 }
505 case T_ARRAY:
506 case T_OBJECT:
507 switch (selector) {
508 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
509 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
510 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
511 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
512 }
513 default:
514 ShouldNotReachHere();
515 return nullptr;
516 }
517
518 #undef RETURN_STUB
519 #undef RETURN_STUB_PARM
520 }
521
522 UnsafeCopyMemoryMark::UnsafeCopyMemoryMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) {
523 _cgen = cgen;
524 _ucm_entry = nullptr;
525 if (add_entry) {
526 address err_exit_pc = nullptr;
527 if (!continue_at_scope_end) {
528 err_exit_pc = error_exit_pc != nullptr ? error_exit_pc : UnsafeCopyMemory::common_exit_stub_pc();
529 }
530 assert(err_exit_pc != nullptr || continue_at_scope_end, "error exit not set");
531 _ucm_entry = UnsafeCopyMemory::add_to_table(_cgen->assembler()->pc(), nullptr, err_exit_pc);
532 }
533 }
534
535 UnsafeCopyMemoryMark::~UnsafeCopyMemoryMark() {
536 if (_ucm_entry != nullptr) {
537 _ucm_entry->set_end_pc(_cgen->assembler()->pc());
538 if (_ucm_entry->error_exit_pc() == nullptr) {
539 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc());
540 }
541 }
542 }