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::_load_inline_type_fields_in_regs = nullptr;
174 address StubRoutines::_store_inline_type_fields_to_buf = nullptr;
175
176 address StubRoutines::_f2hf = nullptr;
177 address StubRoutines::_hf2f = nullptr;
178
179 address StubRoutines::_vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}};
180 address StubRoutines::_vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}};
181
182 address StubRoutines::_cont_thaw = nullptr;
183 address StubRoutines::_cont_returnBarrier = nullptr;
184 address StubRoutines::_cont_returnBarrierExc = nullptr;
185
186 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_write_checkpoint_stub = nullptr;)
187 JFR_ONLY(address StubRoutines::_jfr_write_checkpoint = nullptr;)
188 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_return_lease_stub = nullptr;)
189 JFR_ONLY(address StubRoutines::_jfr_return_lease = nullptr;)
190
191 // Initialization
192 //
193 // Note: to break cycle with universe initialization, stubs are generated in two phases.
194 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
195 // The second phase includes all other stubs (which may depend on universe being initialized.)
196
197 extern void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind); // only interface to generators
198
199 void UnsafeCopyMemory::create_table(int max_size) {
200 UnsafeCopyMemory::_table = new UnsafeCopyMemory[max_size];
201 UnsafeCopyMemory::_table_max_length = max_size;
202 }
203
204 bool UnsafeCopyMemory::contains_pc(address pc) {
205 for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) {
206 UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i];
207 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
208 return true;
209 }
210 }
211 return false;
212 }
213
214 address UnsafeCopyMemory::page_error_continue_pc(address pc) {
215 for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) {
216 UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i];
217 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
218 return entry->error_exit_pc();
219 }
220 }
221 return nullptr;
222 }
223
224
225 static BufferBlob* initialize_stubs(StubCodeGenerator::StubsKind kind,
226 int code_size, int max_aligned_stubs,
227 const char* timer_msg,
228 const char* buffer_name,
229 const char* assert_msg) {
230 ResourceMark rm;
231 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime));
232 // Add extra space for large CodeEntryAlignment
233 int size = code_size + CodeEntryAlignment * max_aligned_stubs;
234 BufferBlob* stubs_code = BufferBlob::create(buffer_name, size);
235 if (stubs_code == nullptr) {
236 vm_exit_out_of_memory(code_size, OOM_MALLOC_ERROR, "CodeCache: no room for %s", buffer_name);
237 }
238 CodeBuffer buffer(stubs_code);
239 StubGenerator_generate(&buffer, kind);
240 // When new stubs added we need to make sure there is some space left
241 // to catch situation when we should increase size again.
242 assert(code_size == 0 || buffer.insts_remaining() > 200, "increase %s", assert_msg);
243
244 LogTarget(Info, stubs) lt;
245 if (lt.is_enabled()) {
246 LogStream ls(lt);
247 ls.print_cr("%s\t [" INTPTR_FORMAT ", " INTPTR_FORMAT "] used: %d, free: %d",
248 buffer_name, p2i(stubs_code->content_begin()), p2i(stubs_code->content_end()),
249 buffer.total_content_size(), buffer.insts_remaining());
250 }
251 return stubs_code;
252 }
253
254 void StubRoutines::initialize_initial_stubs() {
255 if (_initial_stubs_code == nullptr) {
256 _initial_stubs_code = initialize_stubs(StubCodeGenerator::Initial_stubs,
257 _initial_stubs_code_size, 10,
258 "StubRoutines generation initial stubs",
259 "StubRoutines (initial stubs)",
260 "_initial_stubs_code_size");
261 }
262 }
263
264 void StubRoutines::initialize_continuation_stubs() {
265 if (_continuation_stubs_code == nullptr) {
266 _continuation_stubs_code = initialize_stubs(StubCodeGenerator::Continuation_stubs,
267 _continuation_stubs_code_size, 10,
268 "StubRoutines generation continuation stubs",
269 "StubRoutines (continuation stubs)",
270 "_continuation_stubs_code_size");
271 }
272 }
273
274 void StubRoutines::initialize_compiler_stubs() {
275 if (_compiler_stubs_code == nullptr) {
276 _compiler_stubs_code = initialize_stubs(StubCodeGenerator::Compiler_stubs,
277 _compiler_stubs_code_size, 100,
278 "StubRoutines generation compiler stubs",
279 "StubRoutines (compiler stubs)",
280 "_compiler_stubs_code_size");
281 }
282 }
283
284 void StubRoutines::initialize_final_stubs() {
285 if (_final_stubs_code == nullptr) {
286 _final_stubs_code = initialize_stubs(StubCodeGenerator::Final_stubs,
287 _final_stubs_code_size, 10,
288 "StubRoutines generation final stubs",
289 "StubRoutines (final stubs)",
290 "_final_stubs_code_size");
291 }
292 }
293
294 void initial_stubs_init() { StubRoutines::initialize_initial_stubs(); }
295 void continuation_stubs_init() { StubRoutines::initialize_continuation_stubs(); }
296 void final_stubs_init() { StubRoutines::initialize_final_stubs(); }
297
298 void compiler_stubs_init(bool in_compiler_thread) {
299 if (in_compiler_thread && DelayCompilerStubsGeneration) {
300 // Temporarily revert state of stubs generation because
301 // it is called after final_stubs_init() finished
302 // during compiler runtime initialization.
303 // It is fine because these stubs are only used by
304 // compiled code and compiler is not running yet.
305 StubCodeDesc::unfreeze();
306 StubRoutines::initialize_compiler_stubs();
307 StubCodeDesc::freeze();
308 } else if (!in_compiler_thread && !DelayCompilerStubsGeneration) {
309 StubRoutines::initialize_compiler_stubs();
310 }
311 }
312
313 //
314 // Default versions of arraycopy functions
315 //
316
317 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
318 #ifndef PRODUCT
319 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
320 #endif // !PRODUCT
321 Copy::conjoint_jbytes_atomic(src, dest, count);
322 JRT_END
323
324 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
325 #ifndef PRODUCT
326 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
327 #endif // !PRODUCT
328 Copy::conjoint_jshorts_atomic(src, dest, count);
329 JRT_END
330
331 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
332 #ifndef PRODUCT
333 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
334 #endif // !PRODUCT
335 Copy::conjoint_jints_atomic(src, dest, count);
336 JRT_END
337
338 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
339 #ifndef PRODUCT
340 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy
341 #endif // !PRODUCT
342 Copy::conjoint_jlongs_atomic(src, dest, count);
343 JRT_END
344
345 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
346 #ifndef PRODUCT
347 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
348 #endif // !PRODUCT
349 assert(count != 0, "count should be non-zero");
350 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
351 JRT_END
352
353 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
354 #ifndef PRODUCT
355 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
356 #endif // !PRODUCT
357 assert(count != 0, "count should be non-zero");
358 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
359 JRT_END
360
361 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
362 #ifndef PRODUCT
363 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
364 #endif // !PRODUCT
365 Copy::arrayof_conjoint_jbytes(src, dest, count);
366 JRT_END
367
368 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
369 #ifndef PRODUCT
370 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
371 #endif // !PRODUCT
372 Copy::arrayof_conjoint_jshorts(src, dest, count);
373 JRT_END
374
375 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
376 #ifndef PRODUCT
377 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
378 #endif // !PRODUCT
379 Copy::arrayof_conjoint_jints(src, dest, count);
380 JRT_END
381
382 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
383 #ifndef PRODUCT
384 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy
385 #endif // !PRODUCT
386 Copy::arrayof_conjoint_jlongs(src, dest, count);
387 JRT_END
388
389 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
390 #ifndef PRODUCT
391 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
392 #endif // !PRODUCT
393 assert(count != 0, "count should be non-zero");
394 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count);
395 JRT_END
396
397 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
398 #ifndef PRODUCT
399 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
400 #endif // !PRODUCT
401 assert(count != 0, "count should be non-zero");
402 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count);
403 JRT_END
404
405 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
406 #define RETURN_STUB(xxx_fill) { \
407 name = #xxx_fill; \
408 return StubRoutines::xxx_fill(); }
409
410 switch (t) {
411 case T_BYTE:
412 case T_BOOLEAN:
413 if (!aligned) RETURN_STUB(jbyte_fill);
414 RETURN_STUB(arrayof_jbyte_fill);
415 case T_CHAR:
416 case T_SHORT:
417 if (!aligned) RETURN_STUB(jshort_fill);
418 RETURN_STUB(arrayof_jshort_fill);
419 case T_INT:
420 case T_FLOAT:
421 if (!aligned) RETURN_STUB(jint_fill);
422 RETURN_STUB(arrayof_jint_fill);
423 case T_DOUBLE:
424 case T_LONG:
425 case T_ARRAY:
426 case T_PRIMITIVE_OBJECT:
427 case T_OBJECT:
428 case T_NARROWOOP:
429 case T_NARROWKLASS:
430 case T_ADDRESS:
431 case T_VOID:
432 // Currently unsupported
433 return nullptr;
434
435 default:
436 ShouldNotReachHere();
437 return nullptr;
438 }
439
440 #undef RETURN_STUB
441 }
442
443 // constants for computing the copy function
444 enum {
445 COPYFUNC_UNALIGNED = 0,
446 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
447 COPYFUNC_CONJOINT = 0,
448 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
449 };
450
451 // Note: The condition "disjoint" applies also for overlapping copies
452 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
453 address
454 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
455 int selector =
456 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
457 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
458
459 #define RETURN_STUB(xxx_arraycopy) { \
460 name = #xxx_arraycopy; \
461 return StubRoutines::xxx_arraycopy(); }
462
463 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
464 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \
465 return StubRoutines::xxx_arraycopy(parm); }
466
467 switch (t) {
468 case T_BYTE:
469 case T_BOOLEAN:
470 switch (selector) {
471 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
472 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
473 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
474 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
475 }
476 case T_CHAR:
477 case T_SHORT:
478 switch (selector) {
479 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
480 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
481 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
482 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
483 }
484 case T_INT:
485 case T_FLOAT:
486 switch (selector) {
487 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
488 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
489 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
490 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
491 }
492 case T_DOUBLE:
493 case T_LONG:
494 switch (selector) {
495 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
496 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
497 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
498 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
499 }
500 case T_ARRAY:
501 case T_OBJECT:
502 switch (selector) {
503 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
504 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
505 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
506 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
507 }
508 default:
509 ShouldNotReachHere();
510 return nullptr;
511 }
512
513 #undef RETURN_STUB
514 #undef RETURN_STUB_PARM
515 }
516
517 UnsafeCopyMemoryMark::UnsafeCopyMemoryMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) {
518 _cgen = cgen;
519 _ucm_entry = nullptr;
520 if (add_entry) {
521 address err_exit_pc = nullptr;
522 if (!continue_at_scope_end) {
523 err_exit_pc = error_exit_pc != nullptr ? error_exit_pc : UnsafeCopyMemory::common_exit_stub_pc();
524 }
525 assert(err_exit_pc != nullptr || continue_at_scope_end, "error exit not set");
526 _ucm_entry = UnsafeCopyMemory::add_to_table(_cgen->assembler()->pc(), nullptr, err_exit_pc);
527 }
528 }
529
530 UnsafeCopyMemoryMark::~UnsafeCopyMemoryMark() {
531 if (_ucm_entry != nullptr) {
532 _ucm_entry->set_end_pc(_cgen->assembler()->pc());
533 if (_ucm_entry->error_exit_pc() == nullptr) {
534 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc());
535 }
536 }
537 }