1 /*
2 * Copyright (c) 1997, 2024, 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/klass.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "prims/vectorSupport.hpp"
33 #include "runtime/continuation.hpp"
34 #include "runtime/interfaceSupport.inline.hpp"
35 #include "runtime/timerTrace.hpp"
36 #include "runtime/sharedRuntime.hpp"
37 #include "runtime/stubRoutines.hpp"
38 #include "utilities/align.hpp"
39 #include "utilities/copy.hpp"
40 #ifdef COMPILER2
41 #include "opto/runtime.hpp"
42 #endif
43
44 UnsafeMemoryAccess* UnsafeMemoryAccess::_table = nullptr;
45 int UnsafeMemoryAccess::_table_length = 0;
46 int UnsafeMemoryAccess::_table_max_length = 0;
47 address UnsafeMemoryAccess::_common_exit_stub_pc = nullptr;
48
49 // Implementation of StubRoutines - for a description
50 // of how to extend it, see the header file.
51
52 // Class Variables
53
54 BufferBlob* StubRoutines::_initial_stubs_code = nullptr;
55 BufferBlob* StubRoutines::_final_stubs_code = nullptr;
56 BufferBlob* StubRoutines::_compiler_stubs_code = nullptr;
57 BufferBlob* StubRoutines::_continuation_stubs_code = nullptr;
58
59 address StubRoutines::_call_stub_return_address = nullptr;
60 address StubRoutines::_call_stub_entry = nullptr;
61
62 address StubRoutines::_catch_exception_entry = nullptr;
63 address StubRoutines::_forward_exception_entry = nullptr;
64 address StubRoutines::_throw_AbstractMethodError_entry = nullptr;
65 address StubRoutines::_throw_IncompatibleClassChangeError_entry = nullptr;
66 address StubRoutines::_throw_NullPointerException_at_call_entry = nullptr;
67 address StubRoutines::_throw_StackOverflowError_entry = nullptr;
68 address StubRoutines::_throw_delayed_StackOverflowError_entry = nullptr;
69 jint StubRoutines::_verify_oop_count = 0;
70 address StubRoutines::_verify_oop_subroutine_entry = nullptr;
71 address StubRoutines::_atomic_xchg_entry = nullptr;
72 address StubRoutines::_atomic_cmpxchg_entry = nullptr;
73 address StubRoutines::_atomic_cmpxchg_long_entry = nullptr;
74 address StubRoutines::_atomic_add_entry = nullptr;
75 address StubRoutines::_fence_entry = nullptr;
76
77 // Compiled code entry points default values
78 // The default functions don't have separate disjoint versions.
79 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
80 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
81 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
82 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
83 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
84 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
85 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
86 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
87 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
88 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
89 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
90 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
91
92 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
93 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
94 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
95 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
96 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
97 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
98 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
99 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
100 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
101 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
102 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
103 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
104
105 address StubRoutines::_data_cache_writeback = nullptr;
106 address StubRoutines::_data_cache_writeback_sync = nullptr;
107
108 address StubRoutines::_checkcast_arraycopy = nullptr;
109 address StubRoutines::_checkcast_arraycopy_uninit = nullptr;
110 address StubRoutines::_unsafe_arraycopy = nullptr;
111 address StubRoutines::_generic_arraycopy = nullptr;
112
113 address StubRoutines::_unsafe_setmemory = nullptr;
114
115 address StubRoutines::_jbyte_fill;
116 address StubRoutines::_jshort_fill;
117 address StubRoutines::_jint_fill;
118 address StubRoutines::_arrayof_jbyte_fill;
119 address StubRoutines::_arrayof_jshort_fill;
120 address StubRoutines::_arrayof_jint_fill;
121
122 address StubRoutines::_aescrypt_encryptBlock = nullptr;
123 address StubRoutines::_aescrypt_decryptBlock = nullptr;
124 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = nullptr;
125 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = nullptr;
126 address StubRoutines::_electronicCodeBook_encryptAESCrypt = nullptr;
127 address StubRoutines::_electronicCodeBook_decryptAESCrypt = nullptr;
128 address StubRoutines::_counterMode_AESCrypt = nullptr;
129 address StubRoutines::_galoisCounterMode_AESCrypt = nullptr;
130 address StubRoutines::_ghash_processBlocks = nullptr;
131 address StubRoutines::_chacha20Block = nullptr;
132 address StubRoutines::_base64_encodeBlock = nullptr;
133 address StubRoutines::_base64_decodeBlock = nullptr;
134 address StubRoutines::_poly1305_processBlocks = nullptr;
135 address StubRoutines::_intpoly_montgomeryMult_P256 = nullptr;
136 address StubRoutines::_intpoly_assign = nullptr;
137
138 address StubRoutines::_md5_implCompress = nullptr;
139 address StubRoutines::_md5_implCompressMB = nullptr;
140 address StubRoutines::_sha1_implCompress = nullptr;
141 address StubRoutines::_sha1_implCompressMB = nullptr;
142 address StubRoutines::_sha256_implCompress = nullptr;
143 address StubRoutines::_sha256_implCompressMB = nullptr;
144 address StubRoutines::_sha512_implCompress = nullptr;
145 address StubRoutines::_sha512_implCompressMB = nullptr;
146 address StubRoutines::_sha3_implCompress = nullptr;
147 address StubRoutines::_sha3_implCompressMB = nullptr;
148
149 address StubRoutines::_updateBytesCRC32 = nullptr;
150 address StubRoutines::_crc_table_adr = nullptr;
151
152 address StubRoutines::_string_indexof_array[4] = { nullptr };
153
154 address StubRoutines::_crc32c_table_addr = nullptr;
155 address StubRoutines::_updateBytesCRC32C = nullptr;
156 address StubRoutines::_updateBytesAdler32 = nullptr;
157
158 address StubRoutines::_multiplyToLen = nullptr;
159 address StubRoutines::_squareToLen = nullptr;
160 address StubRoutines::_mulAdd = nullptr;
161 address StubRoutines::_montgomeryMultiply = nullptr;
162 address StubRoutines::_montgomerySquare = nullptr;
163 address StubRoutines::_bigIntegerRightShiftWorker = nullptr;
164 address StubRoutines::_bigIntegerLeftShiftWorker = nullptr;
165
166 address StubRoutines::_vectorizedMismatch = nullptr;
167
168 address StubRoutines::_dexp = nullptr;
169 address StubRoutines::_dlog = nullptr;
170 address StubRoutines::_dlog10 = nullptr;
171 address StubRoutines::_fmod = nullptr;
172 address StubRoutines::_dpow = nullptr;
173 address StubRoutines::_dsin = nullptr;
174 address StubRoutines::_dcos = nullptr;
175 address StubRoutines::_dlibm_sin_cos_huge = nullptr;
176 address StubRoutines::_dlibm_reduce_pi04l = nullptr;
177 address StubRoutines::_dlibm_tan_cot_huge = nullptr;
178 address StubRoutines::_dtan = nullptr;
179
180 address StubRoutines::_f2hf = nullptr;
181 address StubRoutines::_hf2f = nullptr;
182
183 address StubRoutines::_vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}};
184 address StubRoutines::_vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}};
185
186 address StubRoutines::_method_entry_barrier = nullptr;
187 address StubRoutines::_array_sort = nullptr;
188 address StubRoutines::_array_partition = nullptr;
189
190 address StubRoutines::_cont_thaw = nullptr;
191 address StubRoutines::_cont_returnBarrier = nullptr;
192 address StubRoutines::_cont_returnBarrierExc = nullptr;
193 address StubRoutines::_cont_preempt_stub = nullptr;
194 address StubRoutines::_cont_resume_monitor_operation = nullptr;
195 address StubRoutines::_cont_resume_compiler_adapter = nullptr;
196
197 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_write_checkpoint_stub = nullptr;)
198 JFR_ONLY(address StubRoutines::_jfr_write_checkpoint = nullptr;)
199 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_return_lease_stub = nullptr;)
200 JFR_ONLY(address StubRoutines::_jfr_return_lease = nullptr;)
201
202 address StubRoutines::_upcall_stub_exception_handler = nullptr;
203
204 address StubRoutines::_lookup_secondary_supers_table_slow_path_stub = nullptr;
205 address StubRoutines::_lookup_secondary_supers_table_stubs[Klass::SECONDARY_SUPERS_TABLE_SIZE] = { nullptr };
206
207
208 // Initialization
209 //
210 // Note: to break cycle with universe initialization, stubs are generated in two phases.
211 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
212 // The second phase includes all other stubs (which may depend on universe being initialized.)
213
214 extern void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind); // only interface to generators
215
216 void UnsafeMemoryAccess::create_table(int max_size) {
217 UnsafeMemoryAccess::_table = new UnsafeMemoryAccess[max_size];
218 UnsafeMemoryAccess::_table_max_length = max_size;
219 }
220
221 bool UnsafeMemoryAccess::contains_pc(address pc) {
222 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) {
223 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i];
224 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
225 return true;
226 }
227 }
228 return false;
229 }
230
231 address UnsafeMemoryAccess::page_error_continue_pc(address pc) {
232 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) {
233 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i];
234 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
235 return entry->error_exit_pc();
236 }
237 }
238 return nullptr;
239 }
240
241
242 static BufferBlob* initialize_stubs(StubCodeGenerator::StubsKind kind,
243 int code_size, int max_aligned_stubs,
244 const char* timer_msg,
245 const char* buffer_name,
246 const char* assert_msg) {
247 ResourceMark rm;
248 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime));
249 // Add extra space for large CodeEntryAlignment
250 int size = code_size + CodeEntryAlignment * max_aligned_stubs;
251 BufferBlob* stubs_code = BufferBlob::create(buffer_name, size);
252 if (stubs_code == nullptr) {
253 vm_exit_out_of_memory(code_size, OOM_MALLOC_ERROR, "CodeCache: no room for %s", buffer_name);
254 }
255 CodeBuffer buffer(stubs_code);
256 StubGenerator_generate(&buffer, kind);
257 // When new stubs added we need to make sure there is some space left
258 // to catch situation when we should increase size again.
259 assert(code_size == 0 || buffer.insts_remaining() > 200, "increase %s", assert_msg);
260
261 LogTarget(Info, stubs) lt;
262 if (lt.is_enabled()) {
263 LogStream ls(lt);
264 ls.print_cr("%s\t [" INTPTR_FORMAT ", " INTPTR_FORMAT "] used: %d, free: %d",
265 buffer_name, p2i(stubs_code->content_begin()), p2i(stubs_code->content_end()),
266 buffer.total_content_size(), buffer.insts_remaining());
267 }
268 return stubs_code;
269 }
270
271 void StubRoutines::initialize_initial_stubs() {
272 if (_initial_stubs_code == nullptr) {
273 _initial_stubs_code = initialize_stubs(StubCodeGenerator::Initial_stubs,
274 _initial_stubs_code_size, 10,
275 "StubRoutines generation initial stubs",
276 "StubRoutines (initial stubs)",
277 "_initial_stubs_code_size");
278 }
279 }
280
281 void StubRoutines::initialize_continuation_stubs() {
282 if (_continuation_stubs_code == nullptr) {
283 _continuation_stubs_code = initialize_stubs(StubCodeGenerator::Continuation_stubs,
284 _continuation_stubs_code_size, 10,
285 "StubRoutines generation continuation stubs",
286 "StubRoutines (continuation stubs)",
287 "_continuation_stubs_code_size");
288 }
289 }
290
291 void StubRoutines::initialize_compiler_stubs() {
292 if (_compiler_stubs_code == nullptr) {
293 _compiler_stubs_code = initialize_stubs(StubCodeGenerator::Compiler_stubs,
294 _compiler_stubs_code_size, 100,
295 "StubRoutines generation compiler stubs",
296 "StubRoutines (compiler stubs)",
297 "_compiler_stubs_code_size");
298 }
299 }
300
301 void StubRoutines::initialize_final_stubs() {
302 if (_final_stubs_code == nullptr) {
303 _final_stubs_code = initialize_stubs(StubCodeGenerator::Final_stubs,
304 _final_stubs_code_size, 10,
305 "StubRoutines generation final stubs",
306 "StubRoutines (final stubs)",
307 "_final_stubs_code_size");
308 }
309 }
310
311 void initial_stubs_init() { StubRoutines::initialize_initial_stubs(); }
312 void continuation_stubs_init() { StubRoutines::initialize_continuation_stubs(); }
313 void final_stubs_init() { StubRoutines::initialize_final_stubs(); }
314
315 void compiler_stubs_init(bool in_compiler_thread) {
316 if (in_compiler_thread && DelayCompilerStubsGeneration) {
317 // Temporarily revert state of stubs generation because
318 // it is called after final_stubs_init() finished
319 // during compiler runtime initialization.
320 // It is fine because these stubs are only used by
321 // compiled code and compiler is not running yet.
322 StubCodeDesc::unfreeze();
323 StubRoutines::initialize_compiler_stubs();
324 StubCodeDesc::freeze();
325 } else if (!in_compiler_thread && !DelayCompilerStubsGeneration) {
326 StubRoutines::initialize_compiler_stubs();
327 }
328 }
329
330 //
331 // Default versions of arraycopy functions
332 //
333
334 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
335 #ifndef PRODUCT
336 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
337 #endif // !PRODUCT
338 Copy::conjoint_jbytes_atomic(src, dest, count);
339 JRT_END
340
341 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
342 #ifndef PRODUCT
343 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
344 #endif // !PRODUCT
345 Copy::conjoint_jshorts_atomic(src, dest, count);
346 JRT_END
347
348 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
349 #ifndef PRODUCT
350 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
351 #endif // !PRODUCT
352 Copy::conjoint_jints_atomic(src, dest, count);
353 JRT_END
354
355 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
356 #ifndef PRODUCT
357 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy
358 #endif // !PRODUCT
359 Copy::conjoint_jlongs_atomic(src, dest, count);
360 JRT_END
361
362 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
363 #ifndef PRODUCT
364 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
365 #endif // !PRODUCT
366 assert(count != 0, "count should be non-zero");
367 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
368 JRT_END
369
370 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
371 #ifndef PRODUCT
372 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
373 #endif // !PRODUCT
374 assert(count != 0, "count should be non-zero");
375 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
376 JRT_END
377
378 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
379 #ifndef PRODUCT
380 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
381 #endif // !PRODUCT
382 Copy::arrayof_conjoint_jbytes(src, dest, count);
383 JRT_END
384
385 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
386 #ifndef PRODUCT
387 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
388 #endif // !PRODUCT
389 Copy::arrayof_conjoint_jshorts(src, dest, count);
390 JRT_END
391
392 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
393 #ifndef PRODUCT
394 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
395 #endif // !PRODUCT
396 Copy::arrayof_conjoint_jints(src, dest, count);
397 JRT_END
398
399 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
400 #ifndef PRODUCT
401 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy
402 #endif // !PRODUCT
403 Copy::arrayof_conjoint_jlongs(src, dest, count);
404 JRT_END
405
406 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
407 #ifndef PRODUCT
408 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
409 #endif // !PRODUCT
410 assert(count != 0, "count should be non-zero");
411 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count);
412 JRT_END
413
414 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
415 #ifndef PRODUCT
416 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
417 #endif // !PRODUCT
418 assert(count != 0, "count should be non-zero");
419 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count);
420 JRT_END
421
422 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
423 #define RETURN_STUB(xxx_fill) { \
424 name = #xxx_fill; \
425 return StubRoutines::xxx_fill(); }
426
427 switch (t) {
428 case T_BYTE:
429 case T_BOOLEAN:
430 if (!aligned) RETURN_STUB(jbyte_fill);
431 RETURN_STUB(arrayof_jbyte_fill);
432 case T_CHAR:
433 case T_SHORT:
434 if (!aligned) RETURN_STUB(jshort_fill);
435 RETURN_STUB(arrayof_jshort_fill);
436 case T_INT:
437 case T_FLOAT:
438 if (!aligned) RETURN_STUB(jint_fill);
439 RETURN_STUB(arrayof_jint_fill);
440 case T_DOUBLE:
441 case T_LONG:
442 case T_ARRAY:
443 case T_OBJECT:
444 case T_NARROWOOP:
445 case T_NARROWKLASS:
446 case T_ADDRESS:
447 case T_VOID:
448 // Currently unsupported
449 return nullptr;
450
451 default:
452 ShouldNotReachHere();
453 return nullptr;
454 }
455
456 #undef RETURN_STUB
457 }
458
459 // constants for computing the copy function
460 enum {
461 COPYFUNC_UNALIGNED = 0,
462 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
463 COPYFUNC_CONJOINT = 0,
464 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
465 };
466
467 // Note: The condition "disjoint" applies also for overlapping copies
468 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
469 address
470 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
471 int selector =
472 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
473 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
474
475 #define RETURN_STUB(xxx_arraycopy) { \
476 name = #xxx_arraycopy; \
477 return StubRoutines::xxx_arraycopy(); }
478
479 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
480 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \
481 return StubRoutines::xxx_arraycopy(parm); }
482
483 switch (t) {
484 case T_BYTE:
485 case T_BOOLEAN:
486 switch (selector) {
487 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
488 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
489 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
490 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
491 }
492 case T_CHAR:
493 case T_SHORT:
494 switch (selector) {
495 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
496 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
497 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
498 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
499 }
500 case T_INT:
501 case T_FLOAT:
502 switch (selector) {
503 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
504 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
505 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
506 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
507 }
508 case T_DOUBLE:
509 case T_LONG:
510 switch (selector) {
511 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
512 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
513 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
514 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
515 }
516 case T_ARRAY:
517 case T_OBJECT:
518 switch (selector) {
519 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
520 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
521 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
522 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
523 }
524 default:
525 ShouldNotReachHere();
526 return nullptr;
527 }
528
529 #undef RETURN_STUB
530 #undef RETURN_STUB_PARM
531 }
532
533 UnsafeMemoryAccessMark::UnsafeMemoryAccessMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) {
534 _cgen = cgen;
535 _ucm_entry = nullptr;
536 if (add_entry) {
537 address err_exit_pc = nullptr;
538 if (!continue_at_scope_end) {
539 err_exit_pc = error_exit_pc != nullptr ? error_exit_pc : UnsafeMemoryAccess::common_exit_stub_pc();
540 }
541 assert(err_exit_pc != nullptr || continue_at_scope_end, "error exit not set");
542 _ucm_entry = UnsafeMemoryAccess::add_to_table(_cgen->assembler()->pc(), nullptr, err_exit_pc);
543 }
544 }
545
546 UnsafeMemoryAccessMark::~UnsafeMemoryAccessMark() {
547 if (_ucm_entry != nullptr) {
548 _ucm_entry->set_end_pc(_cgen->assembler()->pc());
549 if (_ucm_entry->error_exit_pc() == nullptr) {
550 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc());
551 }
552 }
553 }
--- EOF ---