1 /*
2 * Copyright (c) 1997, 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
25 #include "cds/archiveBuilder.hpp"
26 #include "cds/archiveUtils.inline.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/stringTable.hpp"
30 #include "classfile/vmClasses.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/aotCodeCache.hpp"
33 #include "code/codeCache.hpp"
34 #include "code/compiledIC.hpp"
35 #include "code/nmethod.inline.hpp"
36 #include "code/scopeDesc.hpp"
37 #include "code/vtableStubs.hpp"
38 #include "compiler/abstractCompiler.hpp"
39 #include "compiler/compileBroker.hpp"
40 #include "compiler/disassembler.hpp"
41 #include "gc/shared/barrierSet.hpp"
42 #include "gc/shared/collectedHeap.hpp"
43 #include "interpreter/interpreter.hpp"
44 #include "interpreter/interpreterRuntime.hpp"
45 #include "jvm.h"
46 #include "jfr/jfrEvents.hpp"
47 #include "logging/log.hpp"
48 #include "memory/oopFactory.hpp"
49 #include "memory/resourceArea.hpp"
50 #include "memory/universe.hpp"
51 #include "oops/access.hpp"
52 #include "oops/fieldStreams.inline.hpp"
53 #include "metaprogramming/primitiveConversions.hpp"
54 #include "oops/klass.hpp"
55 #include "oops/method.inline.hpp"
56 #include "oops/objArrayKlass.hpp"
57 #include "oops/objArrayOop.inline.hpp"
58 #include "oops/oop.inline.hpp"
59 #include "oops/inlineKlass.inline.hpp"
60 #include "prims/forte.hpp"
61 #include "prims/jvmtiExport.hpp"
62 #include "prims/jvmtiThreadState.hpp"
63 #include "prims/methodHandles.hpp"
64 #include "prims/nativeLookup.hpp"
65 #include "runtime/arguments.hpp"
66 #include "runtime/atomic.hpp"
67 #include "runtime/basicLock.inline.hpp"
68 #include "runtime/frame.inline.hpp"
69 #include "runtime/handles.inline.hpp"
70 #include "runtime/init.hpp"
71 #include "runtime/interfaceSupport.inline.hpp"
72 #include "runtime/java.hpp"
73 #include "runtime/javaCalls.hpp"
74 #include "runtime/jniHandles.inline.hpp"
75 #include "runtime/perfData.hpp"
76 #include "runtime/sharedRuntime.hpp"
77 #include "runtime/stackWatermarkSet.hpp"
78 #include "runtime/stubRoutines.hpp"
79 #include "runtime/synchronizer.inline.hpp"
80 #include "runtime/timerTrace.hpp"
81 #include "runtime/vframe.inline.hpp"
82 #include "runtime/vframeArray.hpp"
83 #include "runtime/vm_version.hpp"
84 #include "utilities/copy.hpp"
85 #include "utilities/dtrace.hpp"
86 #include "utilities/events.hpp"
87 #include "utilities/globalDefinitions.hpp"
88 #include "utilities/resourceHash.hpp"
89 #include "utilities/macros.hpp"
90 #include "utilities/xmlstream.hpp"
91 #ifdef COMPILER1
92 #include "c1/c1_Runtime1.hpp"
93 #endif
94 #if INCLUDE_JFR
95 #include "jfr/jfr.inline.hpp"
96 #endif
97
98 // Shared runtime stub routines reside in their own unique blob with a
99 // single entry point
100
101
102 #define SHARED_STUB_FIELD_DEFINE(name, type) \
103 type SharedRuntime::BLOB_FIELD_NAME(name);
104 SHARED_STUBS_DO(SHARED_STUB_FIELD_DEFINE)
105 #undef SHARED_STUB_FIELD_DEFINE
106
107 nmethod* SharedRuntime::_cont_doYield_stub;
108
109 #define SHARED_STUB_NAME_DECLARE(name, type) "Shared Runtime " # name "_blob",
110 const char *SharedRuntime::_stub_names[] = {
111 SHARED_STUBS_DO(SHARED_STUB_NAME_DECLARE)
112 };
113
114 //----------------------------generate_stubs-----------------------------------
115 void SharedRuntime::generate_initial_stubs() {
116 // Build this early so it's available for the interpreter.
117 _throw_StackOverflowError_blob =
118 generate_throw_exception(SharedStubId::throw_StackOverflowError_id,
119 CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError));
120 }
121
122 void SharedRuntime::generate_stubs() {
123 _wrong_method_blob =
124 generate_resolve_blob(SharedStubId::wrong_method_id,
125 CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method));
126 _wrong_method_abstract_blob =
127 generate_resolve_blob(SharedStubId::wrong_method_abstract_id,
128 CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_abstract));
129 _ic_miss_blob =
130 generate_resolve_blob(SharedStubId::ic_miss_id,
131 CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss));
132 _resolve_opt_virtual_call_blob =
133 generate_resolve_blob(SharedStubId::resolve_opt_virtual_call_id,
134 CAST_FROM_FN_PTR(address, SharedRuntime::resolve_opt_virtual_call_C));
135 _resolve_virtual_call_blob =
136 generate_resolve_blob(SharedStubId::resolve_virtual_call_id,
137 CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C));
138 _resolve_static_call_blob =
139 generate_resolve_blob(SharedStubId::resolve_static_call_id,
140 CAST_FROM_FN_PTR(address, SharedRuntime::resolve_static_call_C));
141
142 _throw_delayed_StackOverflowError_blob =
143 generate_throw_exception(SharedStubId::throw_delayed_StackOverflowError_id,
144 CAST_FROM_FN_PTR(address, SharedRuntime::throw_delayed_StackOverflowError));
145
146 _throw_AbstractMethodError_blob =
147 generate_throw_exception(SharedStubId::throw_AbstractMethodError_id,
148 CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError));
149
150 _throw_IncompatibleClassChangeError_blob =
151 generate_throw_exception(SharedStubId::throw_IncompatibleClassChangeError_id,
152 CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError));
153
154 _throw_NullPointerException_at_call_blob =
155 generate_throw_exception(SharedStubId::throw_NullPointerException_at_call_id,
156 CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call));
157
158 #if COMPILER2_OR_JVMCI
159 // Vectors are generated only by C2 and JVMCI.
160 bool support_wide = is_wide_vector(MaxVectorSize);
161 if (support_wide) {
162 _polling_page_vectors_safepoint_handler_blob =
163 generate_handler_blob(SharedStubId::polling_page_vectors_safepoint_handler_id,
164 CAST_FROM_FN_PTR(address, SafepointSynchronize::handle_polling_page_exception));
165 }
166 #endif // COMPILER2_OR_JVMCI
167 _polling_page_safepoint_handler_blob =
168 generate_handler_blob(SharedStubId::polling_page_safepoint_handler_id,
169 CAST_FROM_FN_PTR(address, SafepointSynchronize::handle_polling_page_exception));
170 _polling_page_return_handler_blob =
171 generate_handler_blob(SharedStubId::polling_page_return_handler_id,
172 CAST_FROM_FN_PTR(address, SafepointSynchronize::handle_polling_page_exception));
173
174 generate_deopt_blob();
175 }
176
177 void SharedRuntime::init_adapter_library() {
178 AdapterHandlerLibrary::initialize();
179 }
180
181 #if INCLUDE_JFR
182 //------------------------------generate jfr runtime stubs ------
183 void SharedRuntime::generate_jfr_stubs() {
184 ResourceMark rm;
185 const char* timer_msg = "SharedRuntime generate_jfr_stubs";
186 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime));
187
188 _jfr_write_checkpoint_blob = generate_jfr_write_checkpoint();
189 _jfr_return_lease_blob = generate_jfr_return_lease();
190 }
191
192 #endif // INCLUDE_JFR
193
194 #include <math.h>
195
196 // Implementation of SharedRuntime
197
198 #ifndef PRODUCT
199 // For statistics
200 uint SharedRuntime::_ic_miss_ctr = 0;
201 uint SharedRuntime::_wrong_method_ctr = 0;
202 uint SharedRuntime::_resolve_static_ctr = 0;
203 uint SharedRuntime::_resolve_virtual_ctr = 0;
204 uint SharedRuntime::_resolve_opt_virtual_ctr = 0;
205 uint SharedRuntime::_implicit_null_throws = 0;
206 uint SharedRuntime::_implicit_div0_throws = 0;
207
208 int64_t SharedRuntime::_nof_normal_calls = 0;
209 int64_t SharedRuntime::_nof_inlined_calls = 0;
210 int64_t SharedRuntime::_nof_megamorphic_calls = 0;
211 int64_t SharedRuntime::_nof_static_calls = 0;
212 int64_t SharedRuntime::_nof_inlined_static_calls = 0;
213 int64_t SharedRuntime::_nof_interface_calls = 0;
214 int64_t SharedRuntime::_nof_inlined_interface_calls = 0;
215
216 uint SharedRuntime::_new_instance_ctr=0;
217 uint SharedRuntime::_new_array_ctr=0;
218 uint SharedRuntime::_multi2_ctr=0;
219 uint SharedRuntime::_multi3_ctr=0;
220 uint SharedRuntime::_multi4_ctr=0;
221 uint SharedRuntime::_multi5_ctr=0;
222 uint SharedRuntime::_mon_enter_stub_ctr=0;
223 uint SharedRuntime::_mon_exit_stub_ctr=0;
224 uint SharedRuntime::_mon_enter_ctr=0;
225 uint SharedRuntime::_mon_exit_ctr=0;
226 uint SharedRuntime::_partial_subtype_ctr=0;
227 uint SharedRuntime::_jbyte_array_copy_ctr=0;
228 uint SharedRuntime::_jshort_array_copy_ctr=0;
229 uint SharedRuntime::_jint_array_copy_ctr=0;
230 uint SharedRuntime::_jlong_array_copy_ctr=0;
231 uint SharedRuntime::_oop_array_copy_ctr=0;
232 uint SharedRuntime::_checkcast_array_copy_ctr=0;
233 uint SharedRuntime::_unsafe_array_copy_ctr=0;
234 uint SharedRuntime::_generic_array_copy_ctr=0;
235 uint SharedRuntime::_slow_array_copy_ctr=0;
236 uint SharedRuntime::_find_handler_ctr=0;
237 uint SharedRuntime::_rethrow_ctr=0;
238 uint SharedRuntime::_unsafe_set_memory_ctr=0;
239
240 int SharedRuntime::_ICmiss_index = 0;
241 int SharedRuntime::_ICmiss_count[SharedRuntime::maxICmiss_count];
242 address SharedRuntime::_ICmiss_at[SharedRuntime::maxICmiss_count];
243
244
245 void SharedRuntime::trace_ic_miss(address at) {
246 for (int i = 0; i < _ICmiss_index; i++) {
247 if (_ICmiss_at[i] == at) {
248 _ICmiss_count[i]++;
249 return;
250 }
251 }
252 int index = _ICmiss_index++;
253 if (_ICmiss_index >= maxICmiss_count) _ICmiss_index = maxICmiss_count - 1;
254 _ICmiss_at[index] = at;
255 _ICmiss_count[index] = 1;
256 }
257
258 void SharedRuntime::print_ic_miss_histogram() {
259 if (ICMissHistogram) {
260 tty->print_cr("IC Miss Histogram:");
261 int tot_misses = 0;
262 for (int i = 0; i < _ICmiss_index; i++) {
263 tty->print_cr(" at: " INTPTR_FORMAT " nof: %d", p2i(_ICmiss_at[i]), _ICmiss_count[i]);
264 tot_misses += _ICmiss_count[i];
265 }
266 tty->print_cr("Total IC misses: %7d", tot_misses);
267 }
268 }
269 #endif // PRODUCT
270
271
272 JRT_LEAF(jlong, SharedRuntime::lmul(jlong y, jlong x))
273 return x * y;
274 JRT_END
275
276
277 JRT_LEAF(jlong, SharedRuntime::ldiv(jlong y, jlong x))
278 if (x == min_jlong && y == CONST64(-1)) {
279 return x;
280 } else {
281 return x / y;
282 }
283 JRT_END
284
285
286 JRT_LEAF(jlong, SharedRuntime::lrem(jlong y, jlong x))
287 if (x == min_jlong && y == CONST64(-1)) {
288 return 0;
289 } else {
290 return x % y;
291 }
292 JRT_END
293
294
295 #ifdef _WIN64
296 const juint float_sign_mask = 0x7FFFFFFF;
297 const juint float_infinity = 0x7F800000;
298 const julong double_sign_mask = CONST64(0x7FFFFFFFFFFFFFFF);
299 const julong double_infinity = CONST64(0x7FF0000000000000);
300 #endif
301
302 #if !defined(X86)
303 JRT_LEAF(jfloat, SharedRuntime::frem(jfloat x, jfloat y))
304 #ifdef _WIN64
305 // 64-bit Windows on amd64 returns the wrong values for
306 // infinity operands.
307 juint xbits = PrimitiveConversions::cast<juint>(x);
308 juint ybits = PrimitiveConversions::cast<juint>(y);
309 // x Mod Infinity == x unless x is infinity
310 if (((xbits & float_sign_mask) != float_infinity) &&
311 ((ybits & float_sign_mask) == float_infinity) ) {
312 return x;
313 }
314 return ((jfloat)fmod_winx64((double)x, (double)y));
315 #else
316 return ((jfloat)fmod((double)x,(double)y));
317 #endif
318 JRT_END
319
320 JRT_LEAF(jdouble, SharedRuntime::drem(jdouble x, jdouble y))
321 #ifdef _WIN64
322 julong xbits = PrimitiveConversions::cast<julong>(x);
323 julong ybits = PrimitiveConversions::cast<julong>(y);
324 // x Mod Infinity == x unless x is infinity
325 if (((xbits & double_sign_mask) != double_infinity) &&
326 ((ybits & double_sign_mask) == double_infinity) ) {
327 return x;
328 }
329 return ((jdouble)fmod_winx64((double)x, (double)y));
330 #else
331 return ((jdouble)fmod((double)x,(double)y));
332 #endif
333 JRT_END
334 #endif // !X86
335
336 JRT_LEAF(jfloat, SharedRuntime::i2f(jint x))
337 return (jfloat)x;
338 JRT_END
339
340 #ifdef __SOFTFP__
341 JRT_LEAF(jfloat, SharedRuntime::fadd(jfloat x, jfloat y))
342 return x + y;
343 JRT_END
344
345 JRT_LEAF(jfloat, SharedRuntime::fsub(jfloat x, jfloat y))
346 return x - y;
347 JRT_END
348
349 JRT_LEAF(jfloat, SharedRuntime::fmul(jfloat x, jfloat y))
350 return x * y;
351 JRT_END
352
353 JRT_LEAF(jfloat, SharedRuntime::fdiv(jfloat x, jfloat y))
354 return x / y;
355 JRT_END
356
357 JRT_LEAF(jdouble, SharedRuntime::dadd(jdouble x, jdouble y))
358 return x + y;
359 JRT_END
360
361 JRT_LEAF(jdouble, SharedRuntime::dsub(jdouble x, jdouble y))
362 return x - y;
363 JRT_END
364
365 JRT_LEAF(jdouble, SharedRuntime::dmul(jdouble x, jdouble y))
366 return x * y;
367 JRT_END
368
369 JRT_LEAF(jdouble, SharedRuntime::ddiv(jdouble x, jdouble y))
370 return x / y;
371 JRT_END
372
373 JRT_LEAF(jdouble, SharedRuntime::i2d(jint x))
374 return (jdouble)x;
375 JRT_END
376
377 JRT_LEAF(jdouble, SharedRuntime::f2d(jfloat x))
378 return (jdouble)x;
379 JRT_END
380
381 JRT_LEAF(int, SharedRuntime::fcmpl(float x, float y))
382 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan*/
383 JRT_END
384
385 JRT_LEAF(int, SharedRuntime::fcmpg(float x, float y))
386 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */
387 JRT_END
388
389 JRT_LEAF(int, SharedRuntime::dcmpl(double x, double y))
390 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan */
391 JRT_END
392
393 JRT_LEAF(int, SharedRuntime::dcmpg(double x, double y))
394 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */
395 JRT_END
396
397 // Functions to return the opposite of the aeabi functions for nan.
398 JRT_LEAF(int, SharedRuntime::unordered_fcmplt(float x, float y))
399 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0);
400 JRT_END
401
402 JRT_LEAF(int, SharedRuntime::unordered_dcmplt(double x, double y))
403 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0);
404 JRT_END
405
406 JRT_LEAF(int, SharedRuntime::unordered_fcmple(float x, float y))
407 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0);
408 JRT_END
409
410 JRT_LEAF(int, SharedRuntime::unordered_dcmple(double x, double y))
411 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0);
412 JRT_END
413
414 JRT_LEAF(int, SharedRuntime::unordered_fcmpge(float x, float y))
415 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0);
416 JRT_END
417
418 JRT_LEAF(int, SharedRuntime::unordered_dcmpge(double x, double y))
419 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0);
420 JRT_END
421
422 JRT_LEAF(int, SharedRuntime::unordered_fcmpgt(float x, float y))
423 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0);
424 JRT_END
425
426 JRT_LEAF(int, SharedRuntime::unordered_dcmpgt(double x, double y))
427 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0);
428 JRT_END
429
430 // Intrinsics make gcc generate code for these.
431 float SharedRuntime::fneg(float f) {
432 return -f;
433 }
434
435 double SharedRuntime::dneg(double f) {
436 return -f;
437 }
438
439 #endif // __SOFTFP__
440
441 #if defined(__SOFTFP__) || defined(E500V2)
442 // Intrinsics make gcc generate code for these.
443 double SharedRuntime::dabs(double f) {
444 return (f <= (double)0.0) ? (double)0.0 - f : f;
445 }
446
447 #endif
448
449 #if defined(__SOFTFP__)
450 double SharedRuntime::dsqrt(double f) {
451 return sqrt(f);
452 }
453 #endif
454
455 JRT_LEAF(jint, SharedRuntime::f2i(jfloat x))
456 if (g_isnan(x))
457 return 0;
458 if (x >= (jfloat) max_jint)
459 return max_jint;
460 if (x <= (jfloat) min_jint)
461 return min_jint;
462 return (jint) x;
463 JRT_END
464
465
466 JRT_LEAF(jlong, SharedRuntime::f2l(jfloat x))
467 if (g_isnan(x))
468 return 0;
469 if (x >= (jfloat) max_jlong)
470 return max_jlong;
471 if (x <= (jfloat) min_jlong)
472 return min_jlong;
473 return (jlong) x;
474 JRT_END
475
476
477 JRT_LEAF(jint, SharedRuntime::d2i(jdouble x))
478 if (g_isnan(x))
479 return 0;
480 if (x >= (jdouble) max_jint)
481 return max_jint;
482 if (x <= (jdouble) min_jint)
483 return min_jint;
484 return (jint) x;
485 JRT_END
486
487
488 JRT_LEAF(jlong, SharedRuntime::d2l(jdouble x))
489 if (g_isnan(x))
490 return 0;
491 if (x >= (jdouble) max_jlong)
492 return max_jlong;
493 if (x <= (jdouble) min_jlong)
494 return min_jlong;
495 return (jlong) x;
496 JRT_END
497
498
499 JRT_LEAF(jfloat, SharedRuntime::d2f(jdouble x))
500 return (jfloat)x;
501 JRT_END
502
503
504 JRT_LEAF(jfloat, SharedRuntime::l2f(jlong x))
505 return (jfloat)x;
506 JRT_END
507
508
509 JRT_LEAF(jdouble, SharedRuntime::l2d(jlong x))
510 return (jdouble)x;
511 JRT_END
512
513
514 // Exception handling across interpreter/compiler boundaries
515 //
516 // exception_handler_for_return_address(...) returns the continuation address.
517 // The continuation address is the entry point of the exception handler of the
518 // previous frame depending on the return address.
519
520 address SharedRuntime::raw_exception_handler_for_return_address(JavaThread* current, address return_address) {
521 // Note: This is called when we have unwound the frame of the callee that did
522 // throw an exception. So far, no check has been performed by the StackWatermarkSet.
523 // Notably, the stack is not walkable at this point, and hence the check must
524 // be deferred until later. Specifically, any of the handlers returned here in
525 // this function, will get dispatched to, and call deferred checks to
526 // StackWatermarkSet::after_unwind at a point where the stack is walkable.
527 assert(frame::verify_return_pc(return_address), "must be a return address: " INTPTR_FORMAT, p2i(return_address));
528 assert(current->frames_to_pop_failed_realloc() == 0 || Interpreter::contains(return_address), "missed frames to pop?");
529
530 // Reset method handle flag.
531 current->set_is_method_handle_return(false);
532
533 #if INCLUDE_JVMCI
534 // JVMCI's ExceptionHandlerStub expects the thread local exception PC to be clear
535 // and other exception handler continuations do not read it
536 current->set_exception_pc(nullptr);
537 #endif // INCLUDE_JVMCI
538
539 if (Continuation::is_return_barrier_entry(return_address)) {
540 return StubRoutines::cont_returnBarrierExc();
541 }
542
543 // The fastest case first
544 CodeBlob* blob = CodeCache::find_blob(return_address);
545 nmethod* nm = (blob != nullptr) ? blob->as_nmethod_or_null() : nullptr;
546 if (nm != nullptr) {
547 // Set flag if return address is a method handle call site.
548 current->set_is_method_handle_return(nm->is_method_handle_return(return_address));
549 // native nmethods don't have exception handlers
550 assert(!nm->is_native_method() || nm->method()->is_continuation_enter_intrinsic(), "no exception handler");
551 assert(nm->header_begin() != nm->exception_begin(), "no exception handler");
552 if (nm->is_deopt_pc(return_address)) {
553 // If we come here because of a stack overflow, the stack may be
554 // unguarded. Reguard the stack otherwise if we return to the
555 // deopt blob and the stack bang causes a stack overflow we
556 // crash.
557 StackOverflow* overflow_state = current->stack_overflow_state();
558 bool guard_pages_enabled = overflow_state->reguard_stack_if_needed();
559 if (overflow_state->reserved_stack_activation() != current->stack_base()) {
560 overflow_state->set_reserved_stack_activation(current->stack_base());
561 }
562 assert(guard_pages_enabled, "stack banging in deopt blob may cause crash");
563 // The deferred StackWatermarkSet::after_unwind check will be performed in
564 // Deoptimization::fetch_unroll_info (with exec_mode == Unpack_exception)
565 return SharedRuntime::deopt_blob()->unpack_with_exception();
566 } else {
567 // The deferred StackWatermarkSet::after_unwind check will be performed in
568 // * OptoRuntime::handle_exception_C_helper for C2 code
569 // * exception_handler_for_pc_helper via Runtime1::handle_exception_from_callee_id for C1 code
570 return nm->exception_begin();
571 }
572 }
573
574 // Entry code
575 if (StubRoutines::returns_to_call_stub(return_address)) {
576 // The deferred StackWatermarkSet::after_unwind check will be performed in
577 // JavaCallWrapper::~JavaCallWrapper
578 assert (StubRoutines::catch_exception_entry() != nullptr, "must be generated before");
579 return StubRoutines::catch_exception_entry();
580 }
581 if (blob != nullptr && blob->is_upcall_stub()) {
582 return StubRoutines::upcall_stub_exception_handler();
583 }
584 // Interpreted code
585 if (Interpreter::contains(return_address)) {
586 // The deferred StackWatermarkSet::after_unwind check will be performed in
587 // InterpreterRuntime::exception_handler_for_exception
588 return Interpreter::rethrow_exception_entry();
589 }
590
591 guarantee(blob == nullptr || !blob->is_runtime_stub(), "caller should have skipped stub");
592 guarantee(!VtableStubs::contains(return_address), "null exceptions in vtables should have been handled already!");
593
594 #ifndef PRODUCT
595 { ResourceMark rm;
596 tty->print_cr("No exception handler found for exception at " INTPTR_FORMAT " - potential problems:", p2i(return_address));
597 os::print_location(tty, (intptr_t)return_address);
598 tty->print_cr("a) exception happened in (new?) code stubs/buffers that is not handled here");
599 tty->print_cr("b) other problem");
600 }
601 #endif // PRODUCT
602 ShouldNotReachHere();
603 return nullptr;
604 }
605
606
607 JRT_LEAF(address, SharedRuntime::exception_handler_for_return_address(JavaThread* current, address return_address))
608 return raw_exception_handler_for_return_address(current, return_address);
609 JRT_END
610
611
612 address SharedRuntime::get_poll_stub(address pc) {
613 address stub;
614 // Look up the code blob
615 CodeBlob *cb = CodeCache::find_blob(pc);
616
617 // Should be an nmethod
618 guarantee(cb != nullptr && cb->is_nmethod(), "safepoint polling: pc must refer to an nmethod");
619
620 // Look up the relocation information
621 assert(cb->as_nmethod()->is_at_poll_or_poll_return(pc),
622 "safepoint polling: type must be poll at pc " INTPTR_FORMAT, p2i(pc));
623
624 #ifdef ASSERT
625 if (!((NativeInstruction*)pc)->is_safepoint_poll()) {
626 tty->print_cr("bad pc: " PTR_FORMAT, p2i(pc));
627 Disassembler::decode(cb);
628 fatal("Only polling locations are used for safepoint");
629 }
630 #endif
631
632 bool at_poll_return = cb->as_nmethod()->is_at_poll_return(pc);
633 bool has_wide_vectors = cb->as_nmethod()->has_wide_vectors();
634 if (at_poll_return) {
635 assert(SharedRuntime::polling_page_return_handler_blob() != nullptr,
636 "polling page return stub not created yet");
637 stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
638 } else if (has_wide_vectors) {
639 assert(SharedRuntime::polling_page_vectors_safepoint_handler_blob() != nullptr,
640 "polling page vectors safepoint stub not created yet");
641 stub = SharedRuntime::polling_page_vectors_safepoint_handler_blob()->entry_point();
642 } else {
643 assert(SharedRuntime::polling_page_safepoint_handler_blob() != nullptr,
644 "polling page safepoint stub not created yet");
645 stub = SharedRuntime::polling_page_safepoint_handler_blob()->entry_point();
646 }
647 log_debug(safepoint)("... found polling page %s exception at pc = "
648 INTPTR_FORMAT ", stub =" INTPTR_FORMAT,
649 at_poll_return ? "return" : "loop",
650 (intptr_t)pc, (intptr_t)stub);
651 return stub;
652 }
653
654 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread* current, Handle h_exception) {
655 if (JvmtiExport::can_post_on_exceptions()) {
656 vframeStream vfst(current, true);
657 methodHandle method = methodHandle(current, vfst.method());
658 address bcp = method()->bcp_from(vfst.bci());
659 JvmtiExport::post_exception_throw(current, method(), bcp, h_exception());
660 }
661
662 #if INCLUDE_JVMCI
663 if (EnableJVMCI) {
664 vframeStream vfst(current, true);
665 methodHandle method = methodHandle(current, vfst.method());
666 int bci = vfst.bci();
667 MethodData* trap_mdo = method->method_data();
668 if (trap_mdo != nullptr) {
669 // Set exception_seen if the exceptional bytecode is an invoke
670 Bytecode_invoke call = Bytecode_invoke_check(method, bci);
671 if (call.is_valid()) {
672 ResourceMark rm(current);
673
674 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
675 MutexLocker ml(trap_mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
676
677 ProfileData* pdata = trap_mdo->allocate_bci_to_data(bci, nullptr);
678 if (pdata != nullptr && pdata->is_BitData()) {
679 BitData* bit_data = (BitData*) pdata;
680 bit_data->set_exception_seen();
681 }
682 }
683 }
684 }
685 #endif
686
687 Exceptions::_throw(current, __FILE__, __LINE__, h_exception);
688 }
689
690 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread* current, Symbol* name, const char *message) {
691 Handle h_exception = Exceptions::new_exception(current, name, message);
692 throw_and_post_jvmti_exception(current, h_exception);
693 }
694
695 #if INCLUDE_JVMTI
696 JRT_ENTRY(void, SharedRuntime::notify_jvmti_vthread_start(oopDesc* vt, jboolean hide, JavaThread* current))
697 assert(hide == JNI_FALSE, "must be VTMS transition finish");
698 jobject vthread = JNIHandles::make_local(const_cast<oopDesc*>(vt));
699 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
700 JNIHandles::destroy_local(vthread);
701 JRT_END
702
703 JRT_ENTRY(void, SharedRuntime::notify_jvmti_vthread_end(oopDesc* vt, jboolean hide, JavaThread* current))
704 assert(hide == JNI_TRUE, "must be VTMS transition start");
705 jobject vthread = JNIHandles::make_local(const_cast<oopDesc*>(vt));
706 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
707 JNIHandles::destroy_local(vthread);
708 JRT_END
709
710 JRT_ENTRY(void, SharedRuntime::notify_jvmti_vthread_mount(oopDesc* vt, jboolean hide, JavaThread* current))
711 jobject vthread = JNIHandles::make_local(const_cast<oopDesc*>(vt));
712 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
713 JNIHandles::destroy_local(vthread);
714 JRT_END
715
716 JRT_ENTRY(void, SharedRuntime::notify_jvmti_vthread_unmount(oopDesc* vt, jboolean hide, JavaThread* current))
717 jobject vthread = JNIHandles::make_local(const_cast<oopDesc*>(vt));
718 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
719 JNIHandles::destroy_local(vthread);
720 JRT_END
721 #endif // INCLUDE_JVMTI
722
723 // The interpreter code to call this tracing function is only
724 // called/generated when UL is on for redefine, class and has the right level
725 // and tags. Since obsolete methods are never compiled, we don't have
726 // to modify the compilers to generate calls to this function.
727 //
728 JRT_LEAF(int, SharedRuntime::rc_trace_method_entry(
729 JavaThread* thread, Method* method))
730 if (method->is_obsolete()) {
731 // We are calling an obsolete method, but this is not necessarily
732 // an error. Our method could have been redefined just after we
733 // fetched the Method* from the constant pool.
734 ResourceMark rm;
735 log_trace(redefine, class, obsolete)("calling obsolete method '%s'", method->name_and_sig_as_C_string());
736 }
737 return 0;
738 JRT_END
739
740 // ret_pc points into caller; we are returning caller's exception handler
741 // for given exception
742 // Note that the implementation of this method assumes it's only called when an exception has actually occured
743 address SharedRuntime::compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
744 bool force_unwind, bool top_frame_only, bool& recursive_exception_occurred) {
745 assert(nm != nullptr, "must exist");
746 ResourceMark rm;
747
748 #if INCLUDE_JVMCI
749 if (nm->is_compiled_by_jvmci()) {
750 // lookup exception handler for this pc
751 int catch_pco = pointer_delta_as_int(ret_pc, nm->code_begin());
752 ExceptionHandlerTable table(nm);
753 HandlerTableEntry *t = table.entry_for(catch_pco, -1, 0);
754 if (t != nullptr) {
755 return nm->code_begin() + t->pco();
756 } else {
757 return Deoptimization::deoptimize_for_missing_exception_handler(nm);
758 }
759 }
760 #endif // INCLUDE_JVMCI
761
762 ScopeDesc* sd = nm->scope_desc_at(ret_pc);
763 // determine handler bci, if any
764 EXCEPTION_MARK;
765
766 int handler_bci = -1;
767 int scope_depth = 0;
768 if (!force_unwind) {
769 int bci = sd->bci();
770 bool recursive_exception = false;
771 do {
772 bool skip_scope_increment = false;
773 // exception handler lookup
774 Klass* ek = exception->klass();
775 methodHandle mh(THREAD, sd->method());
776 handler_bci = Method::fast_exception_handler_bci_for(mh, ek, bci, THREAD);
777 if (HAS_PENDING_EXCEPTION) {
778 recursive_exception = true;
779 // We threw an exception while trying to find the exception handler.
780 // Transfer the new exception to the exception handle which will
781 // be set into thread local storage, and do another lookup for an
782 // exception handler for this exception, this time starting at the
783 // BCI of the exception handler which caused the exception to be
784 // thrown (bugs 4307310 and 4546590). Set "exception" reference
785 // argument to ensure that the correct exception is thrown (4870175).
786 recursive_exception_occurred = true;
787 exception = Handle(THREAD, PENDING_EXCEPTION);
788 CLEAR_PENDING_EXCEPTION;
789 if (handler_bci >= 0) {
790 bci = handler_bci;
791 handler_bci = -1;
792 skip_scope_increment = true;
793 }
794 }
795 else {
796 recursive_exception = false;
797 }
798 if (!top_frame_only && handler_bci < 0 && !skip_scope_increment) {
799 sd = sd->sender();
800 if (sd != nullptr) {
801 bci = sd->bci();
802 }
803 ++scope_depth;
804 }
805 } while (recursive_exception || (!top_frame_only && handler_bci < 0 && sd != nullptr));
806 }
807
808 // found handling method => lookup exception handler
809 int catch_pco = pointer_delta_as_int(ret_pc, nm->code_begin());
810
811 ExceptionHandlerTable table(nm);
812 HandlerTableEntry *t = table.entry_for(catch_pco, handler_bci, scope_depth);
813 if (t == nullptr && (nm->is_compiled_by_c1() || handler_bci != -1)) {
814 // Allow abbreviated catch tables. The idea is to allow a method
815 // to materialize its exceptions without committing to the exact
816 // routing of exceptions. In particular this is needed for adding
817 // a synthetic handler to unlock monitors when inlining
818 // synchronized methods since the unlock path isn't represented in
819 // the bytecodes.
820 t = table.entry_for(catch_pco, -1, 0);
821 }
822
823 #ifdef COMPILER1
824 if (t == nullptr && nm->is_compiled_by_c1()) {
825 assert(nm->unwind_handler_begin() != nullptr, "");
826 return nm->unwind_handler_begin();
827 }
828 #endif
829
830 if (t == nullptr) {
831 ttyLocker ttyl;
832 tty->print_cr("MISSING EXCEPTION HANDLER for pc " INTPTR_FORMAT " and handler bci %d, catch_pco: %d", p2i(ret_pc), handler_bci, catch_pco);
833 tty->print_cr(" Exception:");
834 exception->print();
835 tty->cr();
836 tty->print_cr(" Compiled exception table :");
837 table.print();
838 nm->print();
839 nm->print_code();
840 guarantee(false, "missing exception handler");
841 return nullptr;
842 }
843
844 if (handler_bci != -1) { // did we find a handler in this method?
845 sd->method()->set_exception_handler_entered(handler_bci); // profile
846 }
847 return nm->code_begin() + t->pco();
848 }
849
850 JRT_ENTRY(void, SharedRuntime::throw_AbstractMethodError(JavaThread* current))
851 // These errors occur only at call sites
852 throw_and_post_jvmti_exception(current, vmSymbols::java_lang_AbstractMethodError());
853 JRT_END
854
855 JRT_ENTRY(void, SharedRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
856 // These errors occur only at call sites
857 throw_and_post_jvmti_exception(current, vmSymbols::java_lang_IncompatibleClassChangeError(), "vtable stub");
858 JRT_END
859
860 JRT_ENTRY(void, SharedRuntime::throw_ArithmeticException(JavaThread* current))
861 throw_and_post_jvmti_exception(current, vmSymbols::java_lang_ArithmeticException(), "/ by zero");
862 JRT_END
863
864 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException(JavaThread* current))
865 throw_and_post_jvmti_exception(current, vmSymbols::java_lang_NullPointerException(), nullptr);
866 JRT_END
867
868 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException_at_call(JavaThread* current))
869 // This entry point is effectively only used for NullPointerExceptions which occur at inline
870 // cache sites (when the callee activation is not yet set up) so we are at a call site
871 throw_and_post_jvmti_exception(current, vmSymbols::java_lang_NullPointerException(), nullptr);
872 JRT_END
873
874 JRT_ENTRY(void, SharedRuntime::throw_StackOverflowError(JavaThread* current))
875 throw_StackOverflowError_common(current, false);
876 JRT_END
877
878 JRT_ENTRY(void, SharedRuntime::throw_delayed_StackOverflowError(JavaThread* current))
879 throw_StackOverflowError_common(current, true);
880 JRT_END
881
882 void SharedRuntime::throw_StackOverflowError_common(JavaThread* current, bool delayed) {
883 // We avoid using the normal exception construction in this case because
884 // it performs an upcall to Java, and we're already out of stack space.
885 JavaThread* THREAD = current; // For exception macros.
886 Klass* k = vmClasses::StackOverflowError_klass();
887 oop exception_oop = InstanceKlass::cast(k)->allocate_instance(CHECK);
888 if (delayed) {
889 java_lang_Throwable::set_message(exception_oop,
890 Universe::delayed_stack_overflow_error_message());
891 }
892 Handle exception (current, exception_oop);
893 if (StackTraceInThrowable) {
894 java_lang_Throwable::fill_in_stack_trace(exception);
895 }
896 // Remove the ScopedValue bindings in case we got a
897 // StackOverflowError while we were trying to remove ScopedValue
898 // bindings.
899 current->clear_scopedValueBindings();
900 // Increment counter for hs_err file reporting
901 Atomic::inc(&Exceptions::_stack_overflow_errors);
902 throw_and_post_jvmti_exception(current, exception);
903 }
904
905 address SharedRuntime::continuation_for_implicit_exception(JavaThread* current,
906 address pc,
907 ImplicitExceptionKind exception_kind)
908 {
909 address target_pc = nullptr;
910
911 if (Interpreter::contains(pc)) {
912 switch (exception_kind) {
913 case IMPLICIT_NULL: return Interpreter::throw_NullPointerException_entry();
914 case IMPLICIT_DIVIDE_BY_ZERO: return Interpreter::throw_ArithmeticException_entry();
915 case STACK_OVERFLOW: return Interpreter::throw_StackOverflowError_entry();
916 default: ShouldNotReachHere();
917 }
918 } else {
919 switch (exception_kind) {
920 case STACK_OVERFLOW: {
921 // Stack overflow only occurs upon frame setup; the callee is
922 // going to be unwound. Dispatch to a shared runtime stub
923 // which will cause the StackOverflowError to be fabricated
924 // and processed.
925 // Stack overflow should never occur during deoptimization:
926 // the compiled method bangs the stack by as much as the
927 // interpreter would need in case of a deoptimization. The
928 // deoptimization blob and uncommon trap blob bang the stack
929 // in a debug VM to verify the correctness of the compiled
930 // method stack banging.
931 assert(current->deopt_mark() == nullptr, "no stack overflow from deopt blob/uncommon trap");
932 Events::log_exception(current, "StackOverflowError at " INTPTR_FORMAT, p2i(pc));
933 return SharedRuntime::throw_StackOverflowError_entry();
934 }
935
936 case IMPLICIT_NULL: {
937 if (VtableStubs::contains(pc)) {
938 // We haven't yet entered the callee frame. Fabricate an
939 // exception and begin dispatching it in the caller. Since
940 // the caller was at a call site, it's safe to destroy all
941 // caller-saved registers, as these entry points do.
942 VtableStub* vt_stub = VtableStubs::stub_containing(pc);
943
944 // If vt_stub is null, then return null to signal handler to report the SEGV error.
945 if (vt_stub == nullptr) return nullptr;
946
947 if (vt_stub->is_abstract_method_error(pc)) {
948 assert(!vt_stub->is_vtable_stub(), "should never see AbstractMethodErrors from vtable-type VtableStubs");
949 Events::log_exception(current, "AbstractMethodError at " INTPTR_FORMAT, p2i(pc));
950 // Instead of throwing the abstract method error here directly, we re-resolve
951 // and will throw the AbstractMethodError during resolve. As a result, we'll
952 // get a more detailed error message.
953 return SharedRuntime::get_handle_wrong_method_stub();
954 } else {
955 Events::log_exception(current, "NullPointerException at vtable entry " INTPTR_FORMAT, p2i(pc));
956 // Assert that the signal comes from the expected location in stub code.
957 assert(vt_stub->is_null_pointer_exception(pc),
958 "obtained signal from unexpected location in stub code");
959 return SharedRuntime::throw_NullPointerException_at_call_entry();
960 }
961 } else {
962 CodeBlob* cb = CodeCache::find_blob(pc);
963
964 // If code blob is null, then return null to signal handler to report the SEGV error.
965 if (cb == nullptr) return nullptr;
966
967 // Exception happened in CodeCache. Must be either:
968 // 1. Inline-cache check in C2I handler blob,
969 // 2. Inline-cache check in nmethod, or
970 // 3. Implicit null exception in nmethod
971
972 if (!cb->is_nmethod()) {
973 bool is_in_blob = cb->is_adapter_blob() || cb->is_method_handles_adapter_blob();
974 if (!is_in_blob) {
975 // Allow normal crash reporting to handle this
976 return nullptr;
977 }
978 Events::log_exception(current, "NullPointerException in code blob at " INTPTR_FORMAT, p2i(pc));
979 // There is no handler here, so we will simply unwind.
980 return SharedRuntime::throw_NullPointerException_at_call_entry();
981 }
982
983 // Otherwise, it's a compiled method. Consult its exception handlers.
984 nmethod* nm = cb->as_nmethod();
985 if (nm->inlinecache_check_contains(pc)) {
986 // exception happened inside inline-cache check code
987 // => the nmethod is not yet active (i.e., the frame
988 // is not set up yet) => use return address pushed by
989 // caller => don't push another return address
990 Events::log_exception(current, "NullPointerException in IC check " INTPTR_FORMAT, p2i(pc));
991 return SharedRuntime::throw_NullPointerException_at_call_entry();
992 }
993
994 if (nm->method()->is_method_handle_intrinsic()) {
995 // exception happened inside MH dispatch code, similar to a vtable stub
996 Events::log_exception(current, "NullPointerException in MH adapter " INTPTR_FORMAT, p2i(pc));
997 return SharedRuntime::throw_NullPointerException_at_call_entry();
998 }
999
1000 #ifndef PRODUCT
1001 _implicit_null_throws++;
1002 #endif
1003 target_pc = nm->continuation_for_implicit_null_exception(pc);
1004 // If there's an unexpected fault, target_pc might be null,
1005 // in which case we want to fall through into the normal
1006 // error handling code.
1007 }
1008
1009 break; // fall through
1010 }
1011
1012
1013 case IMPLICIT_DIVIDE_BY_ZERO: {
1014 nmethod* nm = CodeCache::find_nmethod(pc);
1015 guarantee(nm != nullptr, "must have containing compiled method for implicit division-by-zero exceptions");
1016 #ifndef PRODUCT
1017 _implicit_div0_throws++;
1018 #endif
1019 target_pc = nm->continuation_for_implicit_div0_exception(pc);
1020 // If there's an unexpected fault, target_pc might be null,
1021 // in which case we want to fall through into the normal
1022 // error handling code.
1023 break; // fall through
1024 }
1025
1026 default: ShouldNotReachHere();
1027 }
1028
1029 assert(exception_kind == IMPLICIT_NULL || exception_kind == IMPLICIT_DIVIDE_BY_ZERO, "wrong implicit exception kind");
1030
1031 if (exception_kind == IMPLICIT_NULL) {
1032 #ifndef PRODUCT
1033 // for AbortVMOnException flag
1034 Exceptions::debug_check_abort("java.lang.NullPointerException");
1035 #endif //PRODUCT
1036 Events::log_exception(current, "Implicit null exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, p2i(pc), p2i(target_pc));
1037 } else {
1038 #ifndef PRODUCT
1039 // for AbortVMOnException flag
1040 Exceptions::debug_check_abort("java.lang.ArithmeticException");
1041 #endif //PRODUCT
1042 Events::log_exception(current, "Implicit division by zero exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, p2i(pc), p2i(target_pc));
1043 }
1044 return target_pc;
1045 }
1046
1047 ShouldNotReachHere();
1048 return nullptr;
1049 }
1050
1051
1052 /**
1053 * Throws an java/lang/UnsatisfiedLinkError. The address of this method is
1054 * installed in the native function entry of all native Java methods before
1055 * they get linked to their actual native methods.
1056 *
1057 * \note
1058 * This method actually never gets called! The reason is because
1059 * the interpreter's native entries call NativeLookup::lookup() which
1060 * throws the exception when the lookup fails. The exception is then
1061 * caught and forwarded on the return from NativeLookup::lookup() call
1062 * before the call to the native function. This might change in the future.
1063 */
1064 JNI_ENTRY(void*, throw_unsatisfied_link_error(JNIEnv* env, ...))
1065 {
1066 // We return a bad value here to make sure that the exception is
1067 // forwarded before we look at the return value.
1068 THROW_(vmSymbols::java_lang_UnsatisfiedLinkError(), (void*)badAddress);
1069 }
1070 JNI_END
1071
1072 address SharedRuntime::native_method_throw_unsatisfied_link_error_entry() {
1073 return CAST_FROM_FN_PTR(address, &throw_unsatisfied_link_error);
1074 }
1075
1076 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
1077 #if INCLUDE_JVMCI
1078 if (!obj->klass()->has_finalizer()) {
1079 return;
1080 }
1081 #endif // INCLUDE_JVMCI
1082 assert(oopDesc::is_oop(obj), "must be a valid oop");
1083 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
1084 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
1085 JRT_END
1086
1087 jlong SharedRuntime::get_java_tid(JavaThread* thread) {
1088 assert(thread != nullptr, "No thread");
1089 if (thread == nullptr) {
1090 return 0;
1091 }
1092 guarantee(Thread::current() != thread || thread->is_oop_safe(),
1093 "current cannot touch oops after its GC barrier is detached.");
1094 oop obj = thread->threadObj();
1095 return (obj == nullptr) ? 0 : java_lang_Thread::thread_id(obj);
1096 }
1097
1098 /**
1099 * This function ought to be a void function, but cannot be because
1100 * it gets turned into a tail-call on sparc, which runs into dtrace bug
1101 * 6254741. Once that is fixed we can remove the dummy return value.
1102 */
1103 int SharedRuntime::dtrace_object_alloc(oopDesc* o) {
1104 return dtrace_object_alloc(JavaThread::current(), o, o->size());
1105 }
1106
1107 int SharedRuntime::dtrace_object_alloc(JavaThread* thread, oopDesc* o) {
1108 return dtrace_object_alloc(thread, o, o->size());
1109 }
1110
1111 int SharedRuntime::dtrace_object_alloc(JavaThread* thread, oopDesc* o, size_t size) {
1112 assert(DTraceAllocProbes, "wrong call");
1113 Klass* klass = o->klass();
1114 Symbol* name = klass->name();
1115 HOTSPOT_OBJECT_ALLOC(
1116 get_java_tid(thread),
1117 (char *) name->bytes(), name->utf8_length(), size * HeapWordSize);
1118 return 0;
1119 }
1120
1121 JRT_LEAF(int, SharedRuntime::dtrace_method_entry(
1122 JavaThread* current, Method* method))
1123 assert(current == JavaThread::current(), "pre-condition");
1124
1125 assert(DTraceMethodProbes, "wrong call");
1126 Symbol* kname = method->klass_name();
1127 Symbol* name = method->name();
1128 Symbol* sig = method->signature();
1129 HOTSPOT_METHOD_ENTRY(
1130 get_java_tid(current),
1131 (char *) kname->bytes(), kname->utf8_length(),
1132 (char *) name->bytes(), name->utf8_length(),
1133 (char *) sig->bytes(), sig->utf8_length());
1134 return 0;
1135 JRT_END
1136
1137 JRT_LEAF(int, SharedRuntime::dtrace_method_exit(
1138 JavaThread* current, Method* method))
1139 assert(current == JavaThread::current(), "pre-condition");
1140 assert(DTraceMethodProbes, "wrong call");
1141 Symbol* kname = method->klass_name();
1142 Symbol* name = method->name();
1143 Symbol* sig = method->signature();
1144 HOTSPOT_METHOD_RETURN(
1145 get_java_tid(current),
1146 (char *) kname->bytes(), kname->utf8_length(),
1147 (char *) name->bytes(), name->utf8_length(),
1148 (char *) sig->bytes(), sig->utf8_length());
1149 return 0;
1150 JRT_END
1151
1152
1153 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode)
1154 // for a call current in progress, i.e., arguments has been pushed on stack
1155 // put callee has not been invoked yet. Used by: resolve virtual/static,
1156 // vtable updates, etc. Caller frame must be compiled.
1157 Handle SharedRuntime::find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS) {
1158 JavaThread* current = THREAD;
1159 ResourceMark rm(current);
1160
1161 // last java frame on stack (which includes native call frames)
1162 vframeStream vfst(current, true); // Do not skip and javaCalls
1163
1164 return find_callee_info_helper(vfst, bc, callinfo, THREAD);
1165 }
1166
1167 Method* SharedRuntime::extract_attached_method(vframeStream& vfst) {
1168 nmethod* caller = vfst.nm();
1169
1170 address pc = vfst.frame_pc();
1171 { // Get call instruction under lock because another thread may be busy patching it.
1172 CompiledICLocker ic_locker(caller);
1173 return caller->attached_method_before_pc(pc);
1174 }
1175 return nullptr;
1176 }
1177
1178 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode
1179 // for a call current in progress, i.e., arguments has been pushed on stack
1180 // but callee has not been invoked yet. Caller frame must be compiled.
1181 Handle SharedRuntime::find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc,
1182 CallInfo& callinfo, TRAPS) {
1183 Handle receiver;
1184 Handle nullHandle; // create a handy null handle for exception returns
1185 JavaThread* current = THREAD;
1186
1187 assert(!vfst.at_end(), "Java frame must exist");
1188
1189 // Find caller and bci from vframe
1190 methodHandle caller(current, vfst.method());
1191 int bci = vfst.bci();
1192
1193 if (caller->is_continuation_enter_intrinsic()) {
1194 bc = Bytecodes::_invokestatic;
1195 LinkResolver::resolve_continuation_enter(callinfo, CHECK_NH);
1196 return receiver;
1197 }
1198
1199 // Substitutability test implementation piggy backs on static call resolution
1200 Bytecodes::Code code = caller->java_code_at(bci);
1201 if (code == Bytecodes::_if_acmpeq || code == Bytecodes::_if_acmpne) {
1202 bc = Bytecodes::_invokestatic;
1203 methodHandle attached_method(THREAD, extract_attached_method(vfst));
1204 assert(attached_method.not_null(), "must have attached method");
1205 vmClasses::ValueObjectMethods_klass()->initialize(CHECK_NH);
1206 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, false, CHECK_NH);
1207 #ifdef ASSERT
1208 Method* is_subst = vmClasses::ValueObjectMethods_klass()->find_method(vmSymbols::isSubstitutable_name(), vmSymbols::object_object_boolean_signature());
1209 assert(callinfo.selected_method() == is_subst, "must be isSubstitutable method");
1210 #endif
1211 return receiver;
1212 }
1213
1214 Bytecode_invoke bytecode(caller, bci);
1215 int bytecode_index = bytecode.index();
1216 bc = bytecode.invoke_code();
1217
1218 methodHandle attached_method(current, extract_attached_method(vfst));
1219 if (attached_method.not_null()) {
1220 Method* callee = bytecode.static_target(CHECK_NH);
1221 vmIntrinsics::ID id = callee->intrinsic_id();
1222 // When VM replaces MH.invokeBasic/linkTo* call with a direct/virtual call,
1223 // it attaches statically resolved method to the call site.
1224 if (MethodHandles::is_signature_polymorphic(id) &&
1225 MethodHandles::is_signature_polymorphic_intrinsic(id)) {
1226 bc = MethodHandles::signature_polymorphic_intrinsic_bytecode(id);
1227
1228 // Adjust invocation mode according to the attached method.
1229 switch (bc) {
1230 case Bytecodes::_invokevirtual:
1231 if (attached_method->method_holder()->is_interface()) {
1232 bc = Bytecodes::_invokeinterface;
1233 }
1234 break;
1235 case Bytecodes::_invokeinterface:
1236 if (!attached_method->method_holder()->is_interface()) {
1237 bc = Bytecodes::_invokevirtual;
1238 }
1239 break;
1240 case Bytecodes::_invokehandle:
1241 if (!MethodHandles::is_signature_polymorphic_method(attached_method())) {
1242 bc = attached_method->is_static() ? Bytecodes::_invokestatic
1243 : Bytecodes::_invokevirtual;
1244 }
1245 break;
1246 default:
1247 break;
1248 }
1249 } else {
1250 assert(attached_method->has_scalarized_args(), "invalid use of attached method");
1251 if (!attached_method->method_holder()->is_inline_klass()) {
1252 // Ignore the attached method in this case to not confuse below code
1253 attached_method = methodHandle(current, nullptr);
1254 }
1255 }
1256 }
1257
1258 assert(bc != Bytecodes::_illegal, "not initialized");
1259
1260 bool has_receiver = bc != Bytecodes::_invokestatic &&
1261 bc != Bytecodes::_invokedynamic &&
1262 bc != Bytecodes::_invokehandle;
1263 bool check_null_and_abstract = true;
1264
1265 // Find receiver for non-static call
1266 if (has_receiver) {
1267 // This register map must be update since we need to find the receiver for
1268 // compiled frames. The receiver might be in a register.
1269 RegisterMap reg_map2(current,
1270 RegisterMap::UpdateMap::include,
1271 RegisterMap::ProcessFrames::include,
1272 RegisterMap::WalkContinuation::skip);
1273 frame stubFrame = current->last_frame();
1274 // Caller-frame is a compiled frame
1275 frame callerFrame = stubFrame.sender(®_map2);
1276
1277 Method* callee = attached_method();
1278 if (callee == nullptr) {
1279 callee = bytecode.static_target(CHECK_NH);
1280 if (callee == nullptr) {
1281 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle);
1282 }
1283 }
1284 bool caller_is_c1 = callerFrame.is_compiled_frame() && callerFrame.cb()->as_nmethod()->is_compiled_by_c1();
1285 if (!caller_is_c1 && callee->is_scalarized_arg(0)) {
1286 // If the receiver is an inline type that is passed as fields, no oop is available
1287 // Resolve the call without receiver null checking.
1288 assert(!callee->mismatch(), "calls with inline type receivers should never mismatch");
1289 assert(attached_method.not_null() && !attached_method->is_abstract(), "must have non-abstract attached method");
1290 if (bc == Bytecodes::_invokeinterface) {
1291 bc = Bytecodes::_invokevirtual; // C2 optimistically replaces interface calls by virtual calls
1292 }
1293 check_null_and_abstract = false;
1294 } else {
1295 // Retrieve from a compiled argument list
1296 receiver = Handle(current, callerFrame.retrieve_receiver(®_map2));
1297 assert(oopDesc::is_oop_or_null(receiver()), "");
1298 if (receiver.is_null()) {
1299 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle);
1300 }
1301 }
1302 }
1303
1304 // Resolve method
1305 if (attached_method.not_null()) {
1306 // Parameterized by attached method.
1307 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, check_null_and_abstract, CHECK_NH);
1308 } else {
1309 // Parameterized by bytecode.
1310 constantPoolHandle constants(current, caller->constants());
1311 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_NH);
1312 }
1313
1314 #ifdef ASSERT
1315 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls
1316 if (has_receiver && check_null_and_abstract) {
1317 assert(receiver.not_null(), "should have thrown exception");
1318 Klass* receiver_klass = receiver->klass();
1319 Klass* rk = nullptr;
1320 if (attached_method.not_null()) {
1321 // In case there's resolved method attached, use its holder during the check.
1322 rk = attached_method->method_holder();
1323 } else {
1324 // Klass is already loaded.
1325 constantPoolHandle constants(current, caller->constants());
1326 rk = constants->klass_ref_at(bytecode_index, bc, CHECK_NH);
1327 }
1328 Klass* static_receiver_klass = rk;
1329 assert(receiver_klass->is_subtype_of(static_receiver_klass),
1330 "actual receiver must be subclass of static receiver klass");
1331 if (receiver_klass->is_instance_klass()) {
1332 if (InstanceKlass::cast(receiver_klass)->is_not_initialized()) {
1333 tty->print_cr("ERROR: Klass not yet initialized!!");
1334 receiver_klass->print();
1335 }
1336 assert(!InstanceKlass::cast(receiver_klass)->is_not_initialized(), "receiver_klass must be initialized");
1337 }
1338 }
1339 #endif
1340
1341 return receiver;
1342 }
1343
1344 methodHandle SharedRuntime::find_callee_method(bool is_optimized, bool& caller_is_c1, TRAPS) {
1345 JavaThread* current = THREAD;
1346 ResourceMark rm(current);
1347 // We need first to check if any Java activations (compiled, interpreted)
1348 // exist on the stack since last JavaCall. If not, we need
1349 // to get the target method from the JavaCall wrapper.
1350 vframeStream vfst(current, true); // Do not skip any javaCalls
1351 methodHandle callee_method;
1352 if (vfst.at_end()) {
1353 // No Java frames were found on stack since we did the JavaCall.
1354 // Hence the stack can only contain an entry_frame. We need to
1355 // find the target method from the stub frame.
1356 RegisterMap reg_map(current,
1357 RegisterMap::UpdateMap::skip,
1358 RegisterMap::ProcessFrames::include,
1359 RegisterMap::WalkContinuation::skip);
1360 frame fr = current->last_frame();
1361 assert(fr.is_runtime_frame(), "must be a runtimeStub");
1362 fr = fr.sender(®_map);
1363 assert(fr.is_entry_frame(), "must be");
1364 // fr is now pointing to the entry frame.
1365 callee_method = methodHandle(current, fr.entry_frame_call_wrapper()->callee_method());
1366 } else {
1367 Bytecodes::Code bc;
1368 CallInfo callinfo;
1369 find_callee_info_helper(vfst, bc, callinfo, CHECK_(methodHandle()));
1370 // Calls via mismatching methods are always non-scalarized
1371 if (callinfo.resolved_method()->mismatch() && !is_optimized) {
1372 caller_is_c1 = true;
1373 }
1374 callee_method = methodHandle(current, callinfo.selected_method());
1375 }
1376 assert(callee_method()->is_method(), "must be");
1377 return callee_method;
1378 }
1379
1380 // Resolves a call.
1381 methodHandle SharedRuntime::resolve_helper(bool is_virtual, bool is_optimized, bool& caller_is_c1, TRAPS) {
1382 JavaThread* current = THREAD;
1383 ResourceMark rm(current);
1384 RegisterMap cbl_map(current,
1385 RegisterMap::UpdateMap::skip,
1386 RegisterMap::ProcessFrames::include,
1387 RegisterMap::WalkContinuation::skip);
1388 frame caller_frame = current->last_frame().sender(&cbl_map);
1389
1390 CodeBlob* caller_cb = caller_frame.cb();
1391 guarantee(caller_cb != nullptr && caller_cb->is_nmethod(), "must be called from compiled method");
1392 nmethod* caller_nm = caller_cb->as_nmethod();
1393
1394 // determine call info & receiver
1395 // note: a) receiver is null for static calls
1396 // b) an exception is thrown if receiver is null for non-static calls
1397 CallInfo call_info;
1398 Bytecodes::Code invoke_code = Bytecodes::_illegal;
1399 Handle receiver = find_callee_info(invoke_code, call_info, CHECK_(methodHandle()));
1400
1401 NoSafepointVerifier nsv;
1402
1403 methodHandle callee_method(current, call_info.selected_method());
1404 // Calls via mismatching methods are always non-scalarized
1405 if (caller_nm->is_compiled_by_c1() || (call_info.resolved_method()->mismatch() && !is_optimized)) {
1406 caller_is_c1 = true;
1407 }
1408
1409 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic ) ||
1410 (!is_virtual && invoke_code == Bytecodes::_invokespecial) ||
1411 (!is_virtual && invoke_code == Bytecodes::_invokehandle ) ||
1412 (!is_virtual && invoke_code == Bytecodes::_invokedynamic) ||
1413 ( is_virtual && invoke_code != Bytecodes::_invokestatic ), "inconsistent bytecode");
1414
1415 assert(!caller_nm->is_unloading(), "It should not be unloading");
1416
1417 #ifndef PRODUCT
1418 // tracing/debugging/statistics
1419 uint *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) :
1420 (is_virtual) ? (&_resolve_virtual_ctr) :
1421 (&_resolve_static_ctr);
1422 Atomic::inc(addr);
1423
1424 if (TraceCallFixup) {
1425 ResourceMark rm(current);
1426 tty->print("resolving %s%s (%s) call%s to",
1427 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static",
1428 Bytecodes::name(invoke_code), (caller_is_c1) ? " from C1" : "");
1429 callee_method->print_short_name(tty);
1430 tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT,
1431 p2i(caller_frame.pc()), p2i(callee_method->code()));
1432 }
1433 #endif
1434
1435 if (invoke_code == Bytecodes::_invokestatic) {
1436 assert(callee_method->method_holder()->is_initialized() ||
1437 callee_method->method_holder()->is_reentrant_initialization(current),
1438 "invalid class initialization state for invoke_static");
1439 if (!VM_Version::supports_fast_class_init_checks() && callee_method->needs_clinit_barrier()) {
1440 // In order to keep class initialization check, do not patch call
1441 // site for static call when the class is not fully initialized.
1442 // Proper check is enforced by call site re-resolution on every invocation.
1443 //
1444 // When fast class initialization checks are supported (VM_Version::supports_fast_class_init_checks() == true),
1445 // explicit class initialization check is put in nmethod entry (VEP).
1446 assert(callee_method->method_holder()->is_linked(), "must be");
1447 return callee_method;
1448 }
1449 }
1450
1451
1452 // JSR 292 key invariant:
1453 // If the resolved method is a MethodHandle invoke target, the call
1454 // site must be a MethodHandle call site, because the lambda form might tail-call
1455 // leaving the stack in a state unknown to either caller or callee
1456
1457 // Compute entry points. The computation of the entry points is independent of
1458 // patching the call.
1459
1460 // Make sure the callee nmethod does not get deoptimized and removed before
1461 // we are done patching the code.
1462
1463
1464 CompiledICLocker ml(caller_nm);
1465 if (is_virtual && !is_optimized) {
1466 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1467 inline_cache->update(&call_info, receiver->klass(), caller_is_c1);
1468 } else {
1469 // Callsite is a direct call - set it to the destination method
1470 CompiledDirectCall* callsite = CompiledDirectCall::before(caller_frame.pc());
1471 callsite->set(callee_method, caller_is_c1);
1472 }
1473
1474 return callee_method;
1475 }
1476
1477 // Inline caches exist only in compiled code
1478 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* current))
1479 #ifdef ASSERT
1480 RegisterMap reg_map(current,
1481 RegisterMap::UpdateMap::skip,
1482 RegisterMap::ProcessFrames::include,
1483 RegisterMap::WalkContinuation::skip);
1484 frame stub_frame = current->last_frame();
1485 assert(stub_frame.is_runtime_frame(), "sanity check");
1486 frame caller_frame = stub_frame.sender(®_map);
1487 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame() && !caller_frame.is_upcall_stub_frame(), "unexpected frame");
1488 #endif /* ASSERT */
1489
1490 methodHandle callee_method;
1491 bool is_optimized = false;
1492 bool caller_is_c1 = false;
1493 JRT_BLOCK
1494 callee_method = SharedRuntime::handle_ic_miss_helper(is_optimized, caller_is_c1, CHECK_NULL);
1495 // Return Method* through TLS
1496 current->set_vm_result_metadata(callee_method());
1497 JRT_BLOCK_END
1498 // return compiled code entry point after potential safepoints
1499 return get_resolved_entry(current, callee_method, false, is_optimized, caller_is_c1);
1500 JRT_END
1501
1502
1503 // Handle call site that has been made non-entrant
1504 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* current))
1505 // 6243940 We might end up in here if the callee is deoptimized
1506 // as we race to call it. We don't want to take a safepoint if
1507 // the caller was interpreted because the caller frame will look
1508 // interpreted to the stack walkers and arguments are now
1509 // "compiled" so it is much better to make this transition
1510 // invisible to the stack walking code. The i2c path will
1511 // place the callee method in the callee_target. It is stashed
1512 // there because if we try and find the callee by normal means a
1513 // safepoint is possible and have trouble gc'ing the compiled args.
1514 RegisterMap reg_map(current,
1515 RegisterMap::UpdateMap::skip,
1516 RegisterMap::ProcessFrames::include,
1517 RegisterMap::WalkContinuation::skip);
1518 frame stub_frame = current->last_frame();
1519 assert(stub_frame.is_runtime_frame(), "sanity check");
1520 frame caller_frame = stub_frame.sender(®_map);
1521
1522 if (caller_frame.is_interpreted_frame() ||
1523 caller_frame.is_entry_frame() ||
1524 caller_frame.is_upcall_stub_frame()) {
1525 Method* callee = current->callee_target();
1526 guarantee(callee != nullptr && callee->is_method(), "bad handshake");
1527 current->set_vm_result_metadata(callee);
1528 current->set_callee_target(nullptr);
1529 if (caller_frame.is_entry_frame() && VM_Version::supports_fast_class_init_checks()) {
1530 // Bypass class initialization checks in c2i when caller is in native.
1531 // JNI calls to static methods don't have class initialization checks.
1532 // Fast class initialization checks are present in c2i adapters and call into
1533 // SharedRuntime::handle_wrong_method() on the slow path.
1534 //
1535 // JVM upcalls may land here as well, but there's a proper check present in
1536 // LinkResolver::resolve_static_call (called from JavaCalls::call_static),
1537 // so bypassing it in c2i adapter is benign.
1538 return callee->get_c2i_no_clinit_check_entry();
1539 } else {
1540 if (caller_frame.is_interpreted_frame()) {
1541 return callee->get_c2i_inline_entry();
1542 } else {
1543 return callee->get_c2i_entry();
1544 }
1545 }
1546 }
1547
1548 // Must be compiled to compiled path which is safe to stackwalk
1549 methodHandle callee_method;
1550 bool is_static_call = false;
1551 bool is_optimized = false;
1552 bool caller_is_c1 = false;
1553 JRT_BLOCK
1554 // Force resolving of caller (if we called from compiled frame)
1555 callee_method = SharedRuntime::reresolve_call_site(is_static_call, is_optimized, caller_is_c1, CHECK_NULL);
1556 current->set_vm_result_metadata(callee_method());
1557 JRT_BLOCK_END
1558 // return compiled code entry point after potential safepoints
1559 return get_resolved_entry(current, callee_method, is_static_call, is_optimized, caller_is_c1);
1560 JRT_END
1561
1562 // Handle abstract method call
1563 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* current))
1564 // Verbose error message for AbstractMethodError.
1565 // Get the called method from the invoke bytecode.
1566 vframeStream vfst(current, true);
1567 assert(!vfst.at_end(), "Java frame must exist");
1568 methodHandle caller(current, vfst.method());
1569 Bytecode_invoke invoke(caller, vfst.bci());
1570 DEBUG_ONLY( invoke.verify(); )
1571
1572 // Find the compiled caller frame.
1573 RegisterMap reg_map(current,
1574 RegisterMap::UpdateMap::include,
1575 RegisterMap::ProcessFrames::include,
1576 RegisterMap::WalkContinuation::skip);
1577 frame stubFrame = current->last_frame();
1578 assert(stubFrame.is_runtime_frame(), "must be");
1579 frame callerFrame = stubFrame.sender(®_map);
1580 assert(callerFrame.is_compiled_frame(), "must be");
1581
1582 // Install exception and return forward entry.
1583 address res = SharedRuntime::throw_AbstractMethodError_entry();
1584 JRT_BLOCK
1585 methodHandle callee(current, invoke.static_target(current));
1586 if (!callee.is_null()) {
1587 oop recv = callerFrame.retrieve_receiver(®_map);
1588 Klass *recv_klass = (recv != nullptr) ? recv->klass() : nullptr;
1589 res = StubRoutines::forward_exception_entry();
1590 LinkResolver::throw_abstract_method_error(callee, recv_klass, CHECK_(res));
1591 }
1592 JRT_BLOCK_END
1593 return res;
1594 JRT_END
1595
1596 // return verified_code_entry if interp_only_mode is not set for the current thread;
1597 // otherwise return c2i entry.
1598 address SharedRuntime::get_resolved_entry(JavaThread* current, methodHandle callee_method,
1599 bool is_static_call, bool is_optimized, bool caller_is_c1) {
1600 if (current->is_interp_only_mode() && !callee_method->is_special_native_intrinsic()) {
1601 // In interp_only_mode we need to go to the interpreted entry
1602 // The c2i won't patch in this mode -- see fixup_callers_callsite
1603 return callee_method->get_c2i_entry();
1604 }
1605
1606 if (caller_is_c1) {
1607 assert(callee_method->verified_inline_code_entry() != nullptr, "Jump to zero!");
1608 return callee_method->verified_inline_code_entry();
1609 } else if (is_static_call || is_optimized) {
1610 assert(callee_method->verified_code_entry() != nullptr, "Jump to zero!");
1611 return callee_method->verified_code_entry();
1612 } else {
1613 assert(callee_method->verified_inline_ro_code_entry() != nullptr, "Jump to zero!");
1614 return callee_method->verified_inline_ro_code_entry();
1615 }
1616 }
1617
1618 // resolve a static call and patch code
1619 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread* current ))
1620 methodHandle callee_method;
1621 bool caller_is_c1 = false;
1622 bool enter_special = false;
1623 JRT_BLOCK
1624 callee_method = SharedRuntime::resolve_helper(false, false, caller_is_c1, CHECK_NULL);
1625 current->set_vm_result_metadata(callee_method());
1626 JRT_BLOCK_END
1627 // return compiled code entry point after potential safepoints
1628 return get_resolved_entry(current, callee_method, true, false, caller_is_c1);
1629 JRT_END
1630
1631 // resolve virtual call and update inline cache to monomorphic
1632 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread* current))
1633 methodHandle callee_method;
1634 bool caller_is_c1 = false;
1635 JRT_BLOCK
1636 callee_method = SharedRuntime::resolve_helper(true, false, caller_is_c1, CHECK_NULL);
1637 current->set_vm_result_metadata(callee_method());
1638 JRT_BLOCK_END
1639 // return compiled code entry point after potential safepoints
1640 return get_resolved_entry(current, callee_method, false, false, caller_is_c1);
1641 JRT_END
1642
1643
1644 // Resolve a virtual call that can be statically bound (e.g., always
1645 // monomorphic, so it has no inline cache). Patch code to resolved target.
1646 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread* current))
1647 methodHandle callee_method;
1648 bool caller_is_c1 = false;
1649 JRT_BLOCK
1650 callee_method = SharedRuntime::resolve_helper(true, true, caller_is_c1, CHECK_NULL);
1651 current->set_vm_result_metadata(callee_method());
1652 JRT_BLOCK_END
1653 // return compiled code entry point after potential safepoints
1654 return get_resolved_entry(current, callee_method, false, true, caller_is_c1);
1655 JRT_END
1656
1657
1658
1659 methodHandle SharedRuntime::handle_ic_miss_helper(bool& is_optimized, bool& caller_is_c1, TRAPS) {
1660 JavaThread* current = THREAD;
1661 ResourceMark rm(current);
1662 CallInfo call_info;
1663 Bytecodes::Code bc;
1664
1665 // receiver is null for static calls. An exception is thrown for null
1666 // receivers for non-static calls
1667 Handle receiver = find_callee_info(bc, call_info, CHECK_(methodHandle()));
1668
1669 methodHandle callee_method(current, call_info.selected_method());
1670
1671 #ifndef PRODUCT
1672 Atomic::inc(&_ic_miss_ctr);
1673
1674 // Statistics & Tracing
1675 if (TraceCallFixup) {
1676 ResourceMark rm(current);
1677 tty->print("IC miss (%s) call%s to", Bytecodes::name(bc), (caller_is_c1) ? " from C1" : "");
1678 callee_method->print_short_name(tty);
1679 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1680 }
1681
1682 if (ICMissHistogram) {
1683 MutexLocker m(VMStatistic_lock);
1684 RegisterMap reg_map(current,
1685 RegisterMap::UpdateMap::skip,
1686 RegisterMap::ProcessFrames::include,
1687 RegisterMap::WalkContinuation::skip);
1688 frame f = current->last_frame().real_sender(®_map);// skip runtime stub
1689 // produce statistics under the lock
1690 trace_ic_miss(f.pc());
1691 }
1692 #endif
1693
1694 // install an event collector so that when a vtable stub is created the
1695 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The
1696 // event can't be posted when the stub is created as locks are held
1697 // - instead the event will be deferred until the event collector goes
1698 // out of scope.
1699 JvmtiDynamicCodeEventCollector event_collector;
1700
1701 // Update inline cache to megamorphic. Skip update if we are called from interpreted.
1702 RegisterMap reg_map(current,
1703 RegisterMap::UpdateMap::skip,
1704 RegisterMap::ProcessFrames::include,
1705 RegisterMap::WalkContinuation::skip);
1706 frame caller_frame = current->last_frame().sender(®_map);
1707 CodeBlob* cb = caller_frame.cb();
1708 nmethod* caller_nm = cb->as_nmethod();
1709 // Calls via mismatching methods are always non-scalarized
1710 if (caller_nm->is_compiled_by_c1() || call_info.resolved_method()->mismatch()) {
1711 caller_is_c1 = true;
1712 }
1713
1714 CompiledICLocker ml(caller_nm);
1715 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1716 inline_cache->update(&call_info, receiver()->klass(), caller_is_c1);
1717
1718 return callee_method;
1719 }
1720
1721 //
1722 // Resets a call-site in compiled code so it will get resolved again.
1723 // This routines handles both virtual call sites, optimized virtual call
1724 // sites, and static call sites. Typically used to change a call sites
1725 // destination from compiled to interpreted.
1726 //
1727 methodHandle SharedRuntime::reresolve_call_site(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, TRAPS) {
1728 JavaThread* current = THREAD;
1729 ResourceMark rm(current);
1730 RegisterMap reg_map(current,
1731 RegisterMap::UpdateMap::skip,
1732 RegisterMap::ProcessFrames::include,
1733 RegisterMap::WalkContinuation::skip);
1734 frame stub_frame = current->last_frame();
1735 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub");
1736 frame caller = stub_frame.sender(®_map);
1737 if (caller.is_compiled_frame()) {
1738 caller_is_c1 = caller.cb()->as_nmethod()->is_compiled_by_c1();
1739 }
1740
1741 // Do nothing if the frame isn't a live compiled frame.
1742 // nmethod could be deoptimized by the time we get here
1743 // so no update to the caller is needed.
1744
1745 if ((caller.is_compiled_frame() && !caller.is_deoptimized_frame()) ||
1746 (caller.is_native_frame() && caller.cb()->as_nmethod()->method()->is_continuation_enter_intrinsic())) {
1747
1748 address pc = caller.pc();
1749
1750 nmethod* caller_nm = CodeCache::find_nmethod(pc);
1751 assert(caller_nm != nullptr, "did not find caller nmethod");
1752
1753 // Default call_addr is the location of the "basic" call.
1754 // Determine the address of the call we a reresolving. With
1755 // Inline Caches we will always find a recognizable call.
1756 // With Inline Caches disabled we may or may not find a
1757 // recognizable call. We will always find a call for static
1758 // calls and for optimized virtual calls. For vanilla virtual
1759 // calls it depends on the state of the UseInlineCaches switch.
1760 //
1761 // With Inline Caches disabled we can get here for a virtual call
1762 // for two reasons:
1763 // 1 - calling an abstract method. The vtable for abstract methods
1764 // will run us thru handle_wrong_method and we will eventually
1765 // end up in the interpreter to throw the ame.
1766 // 2 - a racing deoptimization. We could be doing a vanilla vtable
1767 // call and between the time we fetch the entry address and
1768 // we jump to it the target gets deoptimized. Similar to 1
1769 // we will wind up in the interprter (thru a c2i with c2).
1770 //
1771 CompiledICLocker ml(caller_nm);
1772 address call_addr = caller_nm->call_instruction_address(pc);
1773
1774 if (call_addr != nullptr) {
1775 // On x86 the logic for finding a call instruction is blindly checking for a call opcode 5
1776 // bytes back in the instruction stream so we must also check for reloc info.
1777 RelocIterator iter(caller_nm, call_addr, call_addr+1);
1778 bool ret = iter.next(); // Get item
1779 if (ret) {
1780 is_static_call = false;
1781 is_optimized = false;
1782 switch (iter.type()) {
1783 case relocInfo::static_call_type:
1784 is_static_call = true;
1785 case relocInfo::opt_virtual_call_type: {
1786 is_optimized = (iter.type() == relocInfo::opt_virtual_call_type);
1787 CompiledDirectCall* cdc = CompiledDirectCall::at(call_addr);
1788 cdc->set_to_clean();
1789 break;
1790 }
1791 case relocInfo::virtual_call_type: {
1792 // compiled, dispatched call (which used to call an interpreted method)
1793 CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr);
1794 inline_cache->set_to_clean();
1795 break;
1796 }
1797 default:
1798 break;
1799 }
1800 }
1801 }
1802 }
1803
1804 methodHandle callee_method = find_callee_method(is_optimized, caller_is_c1, CHECK_(methodHandle()));
1805
1806 #ifndef PRODUCT
1807 Atomic::inc(&_wrong_method_ctr);
1808
1809 if (TraceCallFixup) {
1810 ResourceMark rm(current);
1811 tty->print("handle_wrong_method reresolving call%s to", (caller_is_c1) ? " from C1" : "");
1812 callee_method->print_short_name(tty);
1813 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1814 }
1815 #endif
1816
1817 return callee_method;
1818 }
1819
1820 address SharedRuntime::handle_unsafe_access(JavaThread* thread, address next_pc) {
1821 // The faulting unsafe accesses should be changed to throw the error
1822 // synchronously instead. Meanwhile the faulting instruction will be
1823 // skipped over (effectively turning it into a no-op) and an
1824 // asynchronous exception will be raised which the thread will
1825 // handle at a later point. If the instruction is a load it will
1826 // return garbage.
1827
1828 // Request an async exception.
1829 thread->set_pending_unsafe_access_error();
1830
1831 // Return address of next instruction to execute.
1832 return next_pc;
1833 }
1834
1835 #ifdef ASSERT
1836 void SharedRuntime::check_member_name_argument_is_last_argument(const methodHandle& method,
1837 const BasicType* sig_bt,
1838 const VMRegPair* regs) {
1839 ResourceMark rm;
1840 const int total_args_passed = method->size_of_parameters();
1841 const VMRegPair* regs_with_member_name = regs;
1842 VMRegPair* regs_without_member_name = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed - 1);
1843
1844 const int member_arg_pos = total_args_passed - 1;
1845 assert(member_arg_pos >= 0 && member_arg_pos < total_args_passed, "oob");
1846 assert(sig_bt[member_arg_pos] == T_OBJECT, "dispatch argument must be an object");
1847
1848 java_calling_convention(sig_bt, regs_without_member_name, total_args_passed - 1);
1849
1850 for (int i = 0; i < member_arg_pos; i++) {
1851 VMReg a = regs_with_member_name[i].first();
1852 VMReg b = regs_without_member_name[i].first();
1853 assert(a->value() == b->value(), "register allocation mismatch: a= %d, b= %d", a->value(), b->value());
1854 }
1855 assert(regs_with_member_name[member_arg_pos].first()->is_valid(), "bad member arg");
1856 }
1857 #endif
1858
1859 // ---------------------------------------------------------------------------
1860 // We are calling the interpreter via a c2i. Normally this would mean that
1861 // we were called by a compiled method. However we could have lost a race
1862 // where we went int -> i2c -> c2i and so the caller could in fact be
1863 // interpreted. If the caller is compiled we attempt to patch the caller
1864 // so he no longer calls into the interpreter.
1865 JRT_LEAF(void, SharedRuntime::fixup_callers_callsite(Method* method, address caller_pc))
1866 AARCH64_PORT_ONLY(assert(pauth_ptr_is_raw(caller_pc), "should be raw"));
1867
1868 // It's possible that deoptimization can occur at a call site which hasn't
1869 // been resolved yet, in which case this function will be called from
1870 // an nmethod that has been patched for deopt and we can ignore the
1871 // request for a fixup.
1872 // Also it is possible that we lost a race in that from_compiled_entry
1873 // is now back to the i2c in that case we don't need to patch and if
1874 // we did we'd leap into space because the callsite needs to use
1875 // "to interpreter" stub in order to load up the Method*. Don't
1876 // ask me how I know this...
1877
1878 // Result from nmethod::is_unloading is not stable across safepoints.
1879 NoSafepointVerifier nsv;
1880
1881 nmethod* callee = method->code();
1882 if (callee == nullptr) {
1883 return;
1884 }
1885
1886 // write lock needed because we might patch call site by set_to_clean()
1887 // and is_unloading() can modify nmethod's state
1888 MACOS_AARCH64_ONLY(ThreadWXEnable __wx(WXWrite, JavaThread::current()));
1889
1890 CodeBlob* cb = CodeCache::find_blob(caller_pc);
1891 if (cb == nullptr || !cb->is_nmethod() || !callee->is_in_use() || callee->is_unloading()) {
1892 return;
1893 }
1894
1895 // The check above makes sure this is an nmethod.
1896 nmethod* caller = cb->as_nmethod();
1897
1898 // Get the return PC for the passed caller PC.
1899 address return_pc = caller_pc + frame::pc_return_offset;
1900
1901 if (!caller->is_in_use() || !NativeCall::is_call_before(return_pc)) {
1902 return;
1903 }
1904
1905 // Expect to find a native call there (unless it was no-inline cache vtable dispatch)
1906 CompiledICLocker ic_locker(caller);
1907 ResourceMark rm;
1908
1909 // If we got here through a static call or opt_virtual call, then we know where the
1910 // call address would be; let's peek at it
1911 address callsite_addr = (address)nativeCall_before(return_pc);
1912 RelocIterator iter(caller, callsite_addr, callsite_addr + 1);
1913 if (!iter.next()) {
1914 // No reloc entry found; not a static or optimized virtual call
1915 return;
1916 }
1917
1918 relocInfo::relocType type = iter.reloc()->type();
1919 if (type != relocInfo::static_call_type &&
1920 type != relocInfo::opt_virtual_call_type) {
1921 return;
1922 }
1923
1924 CompiledDirectCall* callsite = CompiledDirectCall::before(return_pc);
1925 callsite->set_to_clean();
1926 JRT_END
1927
1928
1929 // same as JVM_Arraycopy, but called directly from compiled code
1930 JRT_ENTRY(void, SharedRuntime::slow_arraycopy_C(oopDesc* src, jint src_pos,
1931 oopDesc* dest, jint dest_pos,
1932 jint length,
1933 JavaThread* current)) {
1934 #ifndef PRODUCT
1935 _slow_array_copy_ctr++;
1936 #endif
1937 // Check if we have null pointers
1938 if (src == nullptr || dest == nullptr) {
1939 THROW(vmSymbols::java_lang_NullPointerException());
1940 }
1941 // Do the copy. The casts to arrayOop are necessary to the copy_array API,
1942 // even though the copy_array API also performs dynamic checks to ensure
1943 // that src and dest are truly arrays (and are conformable).
1944 // The copy_array mechanism is awkward and could be removed, but
1945 // the compilers don't call this function except as a last resort,
1946 // so it probably doesn't matter.
1947 src->klass()->copy_array((arrayOopDesc*)src, src_pos,
1948 (arrayOopDesc*)dest, dest_pos,
1949 length, current);
1950 }
1951 JRT_END
1952
1953 // The caller of generate_class_cast_message() (or one of its callers)
1954 // must use a ResourceMark in order to correctly free the result.
1955 char* SharedRuntime::generate_class_cast_message(
1956 JavaThread* thread, Klass* caster_klass) {
1957
1958 // Get target class name from the checkcast instruction
1959 vframeStream vfst(thread, true);
1960 assert(!vfst.at_end(), "Java frame must exist");
1961 Bytecode_checkcast cc(vfst.method(), vfst.method()->bcp_from(vfst.bci()));
1962 constantPoolHandle cpool(thread, vfst.method()->constants());
1963 Klass* target_klass = ConstantPool::klass_at_if_loaded(cpool, cc.index());
1964 Symbol* target_klass_name = nullptr;
1965 if (target_klass == nullptr) {
1966 // This klass should be resolved, but just in case, get the name in the klass slot.
1967 target_klass_name = cpool->klass_name_at(cc.index());
1968 }
1969 return generate_class_cast_message(caster_klass, target_klass, target_klass_name);
1970 }
1971
1972
1973 // The caller of generate_class_cast_message() (or one of its callers)
1974 // must use a ResourceMark in order to correctly free the result.
1975 char* SharedRuntime::generate_class_cast_message(
1976 Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name) {
1977 const char* caster_name = caster_klass->external_name();
1978
1979 assert(target_klass != nullptr || target_klass_name != nullptr, "one must be provided");
1980 const char* target_name = target_klass == nullptr ? target_klass_name->as_klass_external_name() :
1981 target_klass->external_name();
1982
1983 size_t msglen = strlen(caster_name) + strlen("class ") + strlen(" cannot be cast to class ") + strlen(target_name) + 1;
1984
1985 const char* caster_klass_description = "";
1986 const char* target_klass_description = "";
1987 const char* klass_separator = "";
1988 if (target_klass != nullptr && caster_klass->module() == target_klass->module()) {
1989 caster_klass_description = caster_klass->joint_in_module_of_loader(target_klass);
1990 } else {
1991 caster_klass_description = caster_klass->class_in_module_of_loader();
1992 target_klass_description = (target_klass != nullptr) ? target_klass->class_in_module_of_loader() : "";
1993 klass_separator = (target_klass != nullptr) ? "; " : "";
1994 }
1995
1996 // add 3 for parenthesis and preceding space
1997 msglen += strlen(caster_klass_description) + strlen(target_klass_description) + strlen(klass_separator) + 3;
1998
1999 char* message = NEW_RESOURCE_ARRAY_RETURN_NULL(char, msglen);
2000 if (message == nullptr) {
2001 // Shouldn't happen, but don't cause even more problems if it does
2002 message = const_cast<char*>(caster_klass->external_name());
2003 } else {
2004 jio_snprintf(message,
2005 msglen,
2006 "class %s cannot be cast to class %s (%s%s%s)",
2007 caster_name,
2008 target_name,
2009 caster_klass_description,
2010 klass_separator,
2011 target_klass_description
2012 );
2013 }
2014 return message;
2015 }
2016
2017 char* SharedRuntime::generate_identity_exception_message(JavaThread* current, Klass* klass) {
2018 assert(klass->is_inline_klass(), "Must be a concrete value class");
2019 const char* desc = "Cannot synchronize on an instance of value class ";
2020 const char* className = klass->external_name();
2021 size_t msglen = strlen(desc) + strlen(className) + 1;
2022 char* message = NEW_RESOURCE_ARRAY(char, msglen);
2023 if (nullptr == message) {
2024 // Out of memory: can't create detailed error message
2025 message = const_cast<char*>(klass->external_name());
2026 } else {
2027 jio_snprintf(message, msglen, "%s%s", desc, className);
2028 }
2029 return message;
2030 }
2031
2032 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages())
2033 (void) JavaThread::current()->stack_overflow_state()->reguard_stack();
2034 JRT_END
2035
2036 void SharedRuntime::monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* current) {
2037 if (!SafepointSynchronize::is_synchronizing()) {
2038 // Only try quick_enter() if we're not trying to reach a safepoint
2039 // so that the calling thread reaches the safepoint more quickly.
2040 if (ObjectSynchronizer::quick_enter(obj, lock, current)) {
2041 return;
2042 }
2043 }
2044 // NO_ASYNC required because an async exception on the state transition destructor
2045 // would leave you with the lock held and it would never be released.
2046 // The normal monitorenter NullPointerException is thrown without acquiring a lock
2047 // and the model is that an exception implies the method failed.
2048 JRT_BLOCK_NO_ASYNC
2049 Handle h_obj(THREAD, obj);
2050 ObjectSynchronizer::enter(h_obj, lock, current);
2051 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here");
2052 JRT_BLOCK_END
2053 }
2054
2055 // Handles the uncommon case in locking, i.e., contention or an inflated lock.
2056 JRT_BLOCK_ENTRY(void, SharedRuntime::complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current))
2057 SharedRuntime::monitor_enter_helper(obj, lock, current);
2058 JRT_END
2059
2060 void SharedRuntime::monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current) {
2061 assert(JavaThread::current() == current, "invariant");
2062 // Exit must be non-blocking, and therefore no exceptions can be thrown.
2063 ExceptionMark em(current);
2064
2065 // Check if C2_MacroAssembler::fast_unlock() or
2066 // C2_MacroAssembler::fast_unlock_lightweight() unlocked an inflated
2067 // monitor before going slow path. Since there is no safepoint
2068 // polling when calling into the VM, we can be sure that the monitor
2069 // hasn't been deallocated.
2070 ObjectMonitor* m = current->unlocked_inflated_monitor();
2071 if (m != nullptr) {
2072 assert(!m->has_owner(current), "must be");
2073 current->clear_unlocked_inflated_monitor();
2074
2075 // We need to reacquire the lock before we can call ObjectSynchronizer::exit().
2076 if (!m->try_enter(current, /*check_for_recursion*/ false)) {
2077 // Some other thread acquired the lock (or the monitor was
2078 // deflated). Either way we are done.
2079 current->dec_held_monitor_count();
2080 return;
2081 }
2082 }
2083
2084 // The object could become unlocked through a JNI call, which we have no other checks for.
2085 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
2086 if (obj->is_unlocked()) {
2087 if (CheckJNICalls) {
2088 fatal("Object has been unlocked by JNI");
2089 }
2090 return;
2091 }
2092 ObjectSynchronizer::exit(obj, lock, current);
2093 }
2094
2095 // Handles the uncommon cases of monitor unlocking in compiled code
2096 JRT_LEAF(void, SharedRuntime::complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current))
2097 assert(current == JavaThread::current(), "pre-condition");
2098 SharedRuntime::monitor_exit_helper(obj, lock, current);
2099 JRT_END
2100
2101 // This is only called when CheckJNICalls is true, and only
2102 // for virtual thread termination.
2103 JRT_LEAF(void, SharedRuntime::log_jni_monitor_still_held())
2104 assert(CheckJNICalls, "Only call this when checking JNI usage");
2105 if (log_is_enabled(Debug, jni)) {
2106 JavaThread* current = JavaThread::current();
2107 int64_t vthread_id = java_lang_Thread::thread_id(current->vthread());
2108 int64_t carrier_id = java_lang_Thread::thread_id(current->threadObj());
2109 log_debug(jni)("VirtualThread (tid: " INT64_FORMAT ", carrier id: " INT64_FORMAT
2110 ") exiting with Objects still locked by JNI MonitorEnter.",
2111 vthread_id, carrier_id);
2112 }
2113 JRT_END
2114
2115 #ifndef PRODUCT
2116
2117 void SharedRuntime::print_statistics() {
2118 ttyLocker ttyl;
2119 if (xtty != nullptr) xtty->head("statistics type='SharedRuntime'");
2120
2121 SharedRuntime::print_ic_miss_histogram();
2122
2123 // Dump the JRT_ENTRY counters
2124 if (_new_instance_ctr) tty->print_cr("%5u new instance requires GC", _new_instance_ctr);
2125 if (_new_array_ctr) tty->print_cr("%5u new array requires GC", _new_array_ctr);
2126 if (_multi2_ctr) tty->print_cr("%5u multianewarray 2 dim", _multi2_ctr);
2127 if (_multi3_ctr) tty->print_cr("%5u multianewarray 3 dim", _multi3_ctr);
2128 if (_multi4_ctr) tty->print_cr("%5u multianewarray 4 dim", _multi4_ctr);
2129 if (_multi5_ctr) tty->print_cr("%5u multianewarray 5 dim", _multi5_ctr);
2130
2131 tty->print_cr("%5u inline cache miss in compiled", _ic_miss_ctr);
2132 tty->print_cr("%5u wrong method", _wrong_method_ctr);
2133 tty->print_cr("%5u unresolved static call site", _resolve_static_ctr);
2134 tty->print_cr("%5u unresolved virtual call site", _resolve_virtual_ctr);
2135 tty->print_cr("%5u unresolved opt virtual call site", _resolve_opt_virtual_ctr);
2136
2137 if (_mon_enter_stub_ctr) tty->print_cr("%5u monitor enter stub", _mon_enter_stub_ctr);
2138 if (_mon_exit_stub_ctr) tty->print_cr("%5u monitor exit stub", _mon_exit_stub_ctr);
2139 if (_mon_enter_ctr) tty->print_cr("%5u monitor enter slow", _mon_enter_ctr);
2140 if (_mon_exit_ctr) tty->print_cr("%5u monitor exit slow", _mon_exit_ctr);
2141 if (_partial_subtype_ctr) tty->print_cr("%5u slow partial subtype", _partial_subtype_ctr);
2142 if (_jbyte_array_copy_ctr) tty->print_cr("%5u byte array copies", _jbyte_array_copy_ctr);
2143 if (_jshort_array_copy_ctr) tty->print_cr("%5u short array copies", _jshort_array_copy_ctr);
2144 if (_jint_array_copy_ctr) tty->print_cr("%5u int array copies", _jint_array_copy_ctr);
2145 if (_jlong_array_copy_ctr) tty->print_cr("%5u long array copies", _jlong_array_copy_ctr);
2146 if (_oop_array_copy_ctr) tty->print_cr("%5u oop array copies", _oop_array_copy_ctr);
2147 if (_checkcast_array_copy_ctr) tty->print_cr("%5u checkcast array copies", _checkcast_array_copy_ctr);
2148 if (_unsafe_array_copy_ctr) tty->print_cr("%5u unsafe array copies", _unsafe_array_copy_ctr);
2149 if (_generic_array_copy_ctr) tty->print_cr("%5u generic array copies", _generic_array_copy_ctr);
2150 if (_slow_array_copy_ctr) tty->print_cr("%5u slow array copies", _slow_array_copy_ctr);
2151 if (_find_handler_ctr) tty->print_cr("%5u find exception handler", _find_handler_ctr);
2152 if (_rethrow_ctr) tty->print_cr("%5u rethrow handler", _rethrow_ctr);
2153 if (_unsafe_set_memory_ctr) tty->print_cr("%5u unsafe set memorys", _unsafe_set_memory_ctr);
2154
2155 AdapterHandlerLibrary::print_statistics();
2156
2157 if (xtty != nullptr) xtty->tail("statistics");
2158 }
2159
2160 inline double percent(int64_t x, int64_t y) {
2161 return 100.0 * (double)x / (double)MAX2(y, (int64_t)1);
2162 }
2163
2164 class MethodArityHistogram {
2165 public:
2166 enum { MAX_ARITY = 256 };
2167 private:
2168 static uint64_t _arity_histogram[MAX_ARITY]; // histogram of #args
2169 static uint64_t _size_histogram[MAX_ARITY]; // histogram of arg size in words
2170 static uint64_t _total_compiled_calls;
2171 static uint64_t _max_compiled_calls_per_method;
2172 static int _max_arity; // max. arity seen
2173 static int _max_size; // max. arg size seen
2174
2175 static void add_method_to_histogram(nmethod* nm) {
2176 Method* method = (nm == nullptr) ? nullptr : nm->method();
2177 if (method != nullptr) {
2178 ArgumentCount args(method->signature());
2179 int arity = args.size() + (method->is_static() ? 0 : 1);
2180 int argsize = method->size_of_parameters();
2181 arity = MIN2(arity, MAX_ARITY-1);
2182 argsize = MIN2(argsize, MAX_ARITY-1);
2183 uint64_t count = (uint64_t)method->compiled_invocation_count();
2184 _max_compiled_calls_per_method = count > _max_compiled_calls_per_method ? count : _max_compiled_calls_per_method;
2185 _total_compiled_calls += count;
2186 _arity_histogram[arity] += count;
2187 _size_histogram[argsize] += count;
2188 _max_arity = MAX2(_max_arity, arity);
2189 _max_size = MAX2(_max_size, argsize);
2190 }
2191 }
2192
2193 void print_histogram_helper(int n, uint64_t* histo, const char* name) {
2194 const int N = MIN2(9, n);
2195 double sum = 0;
2196 double weighted_sum = 0;
2197 for (int i = 0; i <= n; i++) { sum += (double)histo[i]; weighted_sum += (double)(i*histo[i]); }
2198 if (sum >= 1) { // prevent divide by zero or divide overflow
2199 double rest = sum;
2200 double percent = sum / 100;
2201 for (int i = 0; i <= N; i++) {
2202 rest -= (double)histo[i];
2203 tty->print_cr("%4d: " UINT64_FORMAT_W(12) " (%5.1f%%)", i, histo[i], (double)histo[i] / percent);
2204 }
2205 tty->print_cr("rest: " INT64_FORMAT_W(12) " (%5.1f%%)", (int64_t)rest, rest / percent);
2206 tty->print_cr("(avg. %s = %3.1f, max = %d)", name, weighted_sum / sum, n);
2207 tty->print_cr("(total # of compiled calls = " INT64_FORMAT_W(14) ")", _total_compiled_calls);
2208 tty->print_cr("(max # of compiled calls = " INT64_FORMAT_W(14) ")", _max_compiled_calls_per_method);
2209 } else {
2210 tty->print_cr("Histogram generation failed for %s. n = %d, sum = %7.5f", name, n, sum);
2211 }
2212 }
2213
2214 void print_histogram() {
2215 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):");
2216 print_histogram_helper(_max_arity, _arity_histogram, "arity");
2217 tty->print_cr("\nHistogram of parameter block size (in words, incl. rcvr):");
2218 print_histogram_helper(_max_size, _size_histogram, "size");
2219 tty->cr();
2220 }
2221
2222 public:
2223 MethodArityHistogram() {
2224 // Take the Compile_lock to protect against changes in the CodeBlob structures
2225 MutexLocker mu1(Compile_lock, Mutex::_safepoint_check_flag);
2226 // Take the CodeCache_lock to protect against changes in the CodeHeap structure
2227 MutexLocker mu2(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2228 _max_arity = _max_size = 0;
2229 _total_compiled_calls = 0;
2230 _max_compiled_calls_per_method = 0;
2231 for (int i = 0; i < MAX_ARITY; i++) _arity_histogram[i] = _size_histogram[i] = 0;
2232 CodeCache::nmethods_do(add_method_to_histogram);
2233 print_histogram();
2234 }
2235 };
2236
2237 uint64_t MethodArityHistogram::_arity_histogram[MethodArityHistogram::MAX_ARITY];
2238 uint64_t MethodArityHistogram::_size_histogram[MethodArityHistogram::MAX_ARITY];
2239 uint64_t MethodArityHistogram::_total_compiled_calls;
2240 uint64_t MethodArityHistogram::_max_compiled_calls_per_method;
2241 int MethodArityHistogram::_max_arity;
2242 int MethodArityHistogram::_max_size;
2243
2244 void SharedRuntime::print_call_statistics(uint64_t comp_total) {
2245 tty->print_cr("Calls from compiled code:");
2246 int64_t total = _nof_normal_calls + _nof_interface_calls + _nof_static_calls;
2247 int64_t mono_c = _nof_normal_calls - _nof_megamorphic_calls;
2248 int64_t mono_i = _nof_interface_calls;
2249 tty->print_cr("\t" INT64_FORMAT_W(12) " (100%%) total non-inlined ", total);
2250 tty->print_cr("\t" INT64_FORMAT_W(12) " (%4.1f%%) |- virtual calls ", _nof_normal_calls, percent(_nof_normal_calls, total));
2251 tty->print_cr("\t" INT64_FORMAT_W(12) " (%4.0f%%) | |- inlined ", _nof_inlined_calls, percent(_nof_inlined_calls, _nof_normal_calls));
2252 tty->print_cr("\t" INT64_FORMAT_W(12) " (%4.0f%%) | |- monomorphic ", mono_c, percent(mono_c, _nof_normal_calls));
2253 tty->print_cr("\t" INT64_FORMAT_W(12) " (%4.0f%%) | |- megamorphic ", _nof_megamorphic_calls, percent(_nof_megamorphic_calls, _nof_normal_calls));
2254 tty->print_cr("\t" INT64_FORMAT_W(12) " (%4.1f%%) |- interface calls ", _nof_interface_calls, percent(_nof_interface_calls, total));
2255 tty->print_cr("\t" INT64_FORMAT_W(12) " (%4.0f%%) | |- inlined ", _nof_inlined_interface_calls, percent(_nof_inlined_interface_calls, _nof_interface_calls));
2256 tty->print_cr("\t" INT64_FORMAT_W(12) " (%4.0f%%) | |- monomorphic ", mono_i, percent(mono_i, _nof_interface_calls));
2257 tty->print_cr("\t" INT64_FORMAT_W(12) " (%4.1f%%) |- static/special calls", _nof_static_calls, percent(_nof_static_calls, total));
2258 tty->print_cr("\t" INT64_FORMAT_W(12) " (%4.0f%%) | |- inlined ", _nof_inlined_static_calls, percent(_nof_inlined_static_calls, _nof_static_calls));
2259 tty->cr();
2260 tty->print_cr("Note 1: counter updates are not MT-safe.");
2261 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;");
2262 tty->print_cr(" %% in nested categories are relative to their category");
2263 tty->print_cr(" (and thus add up to more than 100%% with inlining)");
2264 tty->cr();
2265
2266 MethodArityHistogram h;
2267 }
2268 #endif
2269
2270 #ifndef PRODUCT
2271 static int _lookups; // number of calls to lookup
2272 static int _equals; // number of buckets checked with matching hash
2273 static int _archived_hits; // number of successful lookups in archived table
2274 static int _runtime_hits; // number of successful lookups in runtime table
2275 #endif
2276
2277 // A simple wrapper class around the calling convention information
2278 // that allows sharing of adapters for the same calling convention.
2279 class AdapterFingerPrint : public MetaspaceObj {
2280 private:
2281 enum {
2282 _basic_type_bits = 5,
2283 _basic_type_mask = right_n_bits(_basic_type_bits),
2284 _basic_types_per_int = BitsPerInt / _basic_type_bits,
2285 };
2286 // TO DO: Consider integrating this with a more global scheme for compressing signatures.
2287 // For now, 4 bits per components (plus T_VOID gaps after double/long) is not excessive.
2288
2289 int _length;
2290
2291 static int data_offset() { return sizeof(AdapterFingerPrint); }
2292 int* data_pointer() {
2293 return (int*)((address)this + data_offset());
2294 }
2295
2296 // Private construtor. Use allocate() to get an instance.
2297 AdapterFingerPrint(const GrowableArray<SigEntry>* sig, bool has_ro_adapter = false) {
2298 int* data = data_pointer();
2299 // Pack the BasicTypes with 8 per int
2300 int total_args_passed = total_args_passed_in_sig(sig);
2301 _length = length(total_args_passed);
2302 int sig_index = 0;
2303 BasicType prev_bt = T_ILLEGAL;
2304 int vt_count = 0;
2305 for (int index = 0; index < _length; index++) {
2306 int value = 0;
2307 for (int byte = 0; byte < _basic_types_per_int; byte++) {
2308 BasicType bt = T_ILLEGAL;
2309 if (sig_index < total_args_passed) {
2310 bt = sig->at(sig_index++)._bt;
2311 if (bt == T_METADATA) {
2312 // Found start of inline type in signature
2313 assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
2314 if (sig_index == 1 && has_ro_adapter) {
2315 // With a ro_adapter, replace receiver inline type delimiter by T_VOID to prevent matching
2316 // with other adapters that have the same inline type as first argument and no receiver.
2317 bt = T_VOID;
2318 }
2319 vt_count++;
2320 } else if (bt == T_VOID && prev_bt != T_LONG && prev_bt != T_DOUBLE) {
2321 // Found end of inline type in signature
2322 assert(InlineTypePassFieldsAsArgs, "unexpected end of inline type");
2323 vt_count--;
2324 assert(vt_count >= 0, "invalid vt_count");
2325 } else if (vt_count == 0) {
2326 // Widen fields that are not part of a scalarized inline type argument
2327 bt = adapter_encoding(bt);
2328 }
2329 prev_bt = bt;
2330 }
2331 int bt_val = (bt == T_ILLEGAL) ? 0 : bt;
2332 assert((bt_val & _basic_type_mask) == bt_val, "must fit in 4 bits");
2333 value = (value << _basic_type_bits) | bt_val;
2334 }
2335 data[index] = value;
2336 }
2337 assert(vt_count == 0, "invalid vt_count");
2338 }
2339
2340 // Call deallocate instead
2341 ~AdapterFingerPrint() {
2342 ShouldNotCallThis();
2343 }
2344
2345 static int total_args_passed_in_sig(const GrowableArray<SigEntry>* sig) {
2346 return (sig != nullptr) ? sig->length() : 0;
2347 }
2348
2349 static int length(int total_args) {
2350 return (total_args + (_basic_types_per_int-1)) / _basic_types_per_int;
2351 }
2352
2353 static int compute_size_in_words(int len) {
2354 return (int)heap_word_size(sizeof(AdapterFingerPrint) + (len * sizeof(int)));
2355 }
2356
2357 // Remap BasicTypes that are handled equivalently by the adapters.
2358 // These are correct for the current system but someday it might be
2359 // necessary to make this mapping platform dependent.
2360 static BasicType adapter_encoding(BasicType in) {
2361 switch (in) {
2362 case T_BOOLEAN:
2363 case T_BYTE:
2364 case T_SHORT:
2365 case T_CHAR:
2366 // They are all promoted to T_INT in the calling convention
2367 return T_INT;
2368
2369 case T_OBJECT:
2370 case T_ARRAY:
2371 // In other words, we assume that any register good enough for
2372 // an int or long is good enough for a managed pointer.
2373 #ifdef _LP64
2374 return T_LONG;
2375 #else
2376 return T_INT;
2377 #endif
2378
2379 case T_INT:
2380 case T_LONG:
2381 case T_FLOAT:
2382 case T_DOUBLE:
2383 case T_VOID:
2384 return in;
2385
2386 default:
2387 ShouldNotReachHere();
2388 return T_CONFLICT;
2389 }
2390 }
2391
2392 void* operator new(size_t size, size_t fp_size) throw() {
2393 assert(fp_size >= size, "sanity check");
2394 void* p = AllocateHeap(fp_size, mtCode);
2395 memset(p, 0, fp_size);
2396 return p;
2397 }
2398
2399 public:
2400 template<typename Function>
2401 void iterate_args(Function function) {
2402 for (int i = 0; i < length(); i++) {
2403 unsigned val = (unsigned)value(i);
2404 // args are packed so that first/lower arguments are in the highest
2405 // bits of each int value, so iterate from highest to the lowest
2406 int first_entry = _basic_types_per_int * _basic_type_bits;
2407 for (int j = first_entry; j >= 0; j -= _basic_type_bits) {
2408 unsigned v = (val >> j) & _basic_type_mask;
2409 if (v == 0) {
2410 continue;
2411 }
2412 function(v);
2413 }
2414 }
2415 }
2416
2417 static AdapterFingerPrint* allocate(const GrowableArray<SigEntry>* sig, bool has_ro_adapter = false) {
2418 int total_args_passed = total_args_passed_in_sig(sig);
2419 int len = length(total_args_passed);
2420 int size_in_bytes = BytesPerWord * compute_size_in_words(len);
2421 AdapterFingerPrint* afp = new (size_in_bytes) AdapterFingerPrint(sig, has_ro_adapter);
2422 assert((afp->size() * BytesPerWord) == size_in_bytes, "should match");
2423 return afp;
2424 }
2425
2426 static void deallocate(AdapterFingerPrint* fp) {
2427 FreeHeap(fp);
2428 }
2429
2430 int value(int index) {
2431 int* data = data_pointer();
2432 return data[index];
2433 }
2434
2435 int length() {
2436 return _length;
2437 }
2438
2439 unsigned int compute_hash() {
2440 int hash = 0;
2441 for (int i = 0; i < length(); i++) {
2442 int v = value(i);
2443 //Add arithmetic operation to the hash, like +3 to improve hashing
2444 hash = ((hash << 8) ^ v ^ (hash >> 5)) + 3;
2445 }
2446 return (unsigned int)hash;
2447 }
2448
2449 const char* as_string() {
2450 stringStream st;
2451 st.print("0x");
2452 for (int i = 0; i < length(); i++) {
2453 st.print("%x", value(i));
2454 }
2455 return st.as_string();
2456 }
2457
2458 const char* as_basic_args_string() {
2459 stringStream st;
2460 bool long_prev = false;
2461 iterate_args([&] (int arg) {
2462 if (long_prev) {
2463 long_prev = false;
2464 if (arg == T_VOID) {
2465 st.print("J");
2466 } else {
2467 st.print("L");
2468 }
2469 }
2470 if (arg == T_LONG) {
2471 long_prev = true;
2472 } else if (arg != T_VOID) {
2473 st.print("%c", type2char((BasicType)arg));
2474 }
2475 });
2476 if (long_prev) {
2477 st.print("L");
2478 }
2479 return st.as_string();
2480 }
2481
2482 bool equals(AdapterFingerPrint* other) {
2483 if (other->_length != _length) {
2484 return false;
2485 } else {
2486 for (int i = 0; i < _length; i++) {
2487 if (value(i) != other->value(i)) {
2488 return false;
2489 }
2490 }
2491 }
2492 return true;
2493 }
2494
2495 // methods required by virtue of being a MetaspaceObj
2496 void metaspace_pointers_do(MetaspaceClosure* it) { return; /* nothing to do here */ }
2497 int size() const { return compute_size_in_words(_length); }
2498 MetaspaceObj::Type type() const { return AdapterFingerPrintType; }
2499
2500 static bool equals(AdapterFingerPrint* const& fp1, AdapterFingerPrint* const& fp2) {
2501 NOT_PRODUCT(_equals++);
2502 return fp1->equals(fp2);
2503 }
2504
2505 static unsigned int compute_hash(AdapterFingerPrint* const& fp) {
2506 return fp->compute_hash();
2507 }
2508 };
2509
2510 #if INCLUDE_CDS
2511 static inline bool adapter_fp_equals_compact_hashtable_entry(AdapterHandlerEntry* entry, AdapterFingerPrint* fp, int len_unused) {
2512 return AdapterFingerPrint::equals(entry->fingerprint(), fp);
2513 }
2514
2515 class ArchivedAdapterTable : public OffsetCompactHashtable<
2516 AdapterFingerPrint*,
2517 AdapterHandlerEntry*,
2518 adapter_fp_equals_compact_hashtable_entry> {};
2519 #endif // INCLUDE_CDS
2520
2521 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries
2522 using AdapterHandlerTable = ResourceHashtable<AdapterFingerPrint*, AdapterHandlerEntry*, 293,
2523 AnyObj::C_HEAP, mtCode,
2524 AdapterFingerPrint::compute_hash,
2525 AdapterFingerPrint::equals>;
2526 static AdapterHandlerTable* _adapter_handler_table;
2527 static GrowableArray<AdapterHandlerEntry*>* _adapter_handler_list = nullptr;
2528
2529 // Find a entry with the same fingerprint if it exists
2530 AdapterHandlerEntry* AdapterHandlerLibrary::lookup(const GrowableArray<SigEntry>* sig, bool has_ro_adapter) {
2531 NOT_PRODUCT(_lookups++);
2532 assert_lock_strong(AdapterHandlerLibrary_lock);
2533 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(sig, has_ro_adapter);
2534 AdapterHandlerEntry* entry = nullptr;
2535 #if INCLUDE_CDS
2536 // if we are building the archive then the archived adapter table is
2537 // not valid and we need to use the ones added to the runtime table
2538 if (AOTCodeCache::is_using_adapter()) {
2539 // Search archived table first. It is read-only table so can be searched without lock
2540 entry = _aot_adapter_handler_table.lookup(fp, fp->compute_hash(), 0 /* unused */);
2541 #ifndef PRODUCT
2542 if (entry != nullptr) {
2543 _archived_hits++;
2544 }
2545 #endif
2546 }
2547 #endif // INCLUDE_CDS
2548 if (entry == nullptr) {
2549 assert_lock_strong(AdapterHandlerLibrary_lock);
2550 AdapterHandlerEntry** entry_p = _adapter_handler_table->get(fp);
2551 if (entry_p != nullptr) {
2552 entry = *entry_p;
2553 assert(entry->fingerprint()->equals(fp), "fingerprint mismatch key fp %s %s (hash=%d) != found fp %s %s (hash=%d)",
2554 entry->fingerprint()->as_basic_args_string(), entry->fingerprint()->as_string(), entry->fingerprint()->compute_hash(),
2555 fp->as_basic_args_string(), fp->as_string(), fp->compute_hash());
2556 #ifndef PRODUCT
2557 _runtime_hits++;
2558 #endif
2559 }
2560 }
2561 AdapterFingerPrint::deallocate(fp);
2562 return entry;
2563 }
2564
2565 #ifndef PRODUCT
2566 static void print_table_statistics() {
2567 auto size = [&] (AdapterFingerPrint* key, AdapterHandlerEntry* a) {
2568 return sizeof(*key) + sizeof(*a);
2569 };
2570 TableStatistics ts = _adapter_handler_table->statistics_calculate(size);
2571 ts.print(tty, "AdapterHandlerTable");
2572 tty->print_cr("AdapterHandlerTable (table_size=%d, entries=%d)",
2573 _adapter_handler_table->table_size(), _adapter_handler_table->number_of_entries());
2574 int total_hits = _archived_hits + _runtime_hits;
2575 tty->print_cr("AdapterHandlerTable: lookups %d equals %d hits %d (archived=%d+runtime=%d)",
2576 _lookups, _equals, total_hits, _archived_hits, _runtime_hits);
2577 }
2578 #endif
2579
2580 // ---------------------------------------------------------------------------
2581 // Implementation of AdapterHandlerLibrary
2582 AdapterHandlerEntry* AdapterHandlerLibrary::_abstract_method_handler = nullptr;
2583 AdapterHandlerEntry* AdapterHandlerLibrary::_no_arg_handler = nullptr;
2584 AdapterHandlerEntry* AdapterHandlerLibrary::_int_arg_handler = nullptr;
2585 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_arg_handler = nullptr;
2586 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_int_arg_handler = nullptr;
2587 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_obj_arg_handler = nullptr;
2588 #if INCLUDE_CDS
2589 ArchivedAdapterTable AdapterHandlerLibrary::_aot_adapter_handler_table;
2590 #endif // INCLUDE_CDS
2591 static const int AdapterHandlerLibrary_size = 48*K;
2592 BufferBlob* AdapterHandlerLibrary::_buffer = nullptr;
2593
2594 BufferBlob* AdapterHandlerLibrary::buffer_blob() {
2595 assert(_buffer != nullptr, "should be initialized");
2596 return _buffer;
2597 }
2598
2599 static void post_adapter_creation(const AdapterBlob* new_adapter,
2600 const AdapterHandlerEntry* entry) {
2601 if (Forte::is_enabled() || JvmtiExport::should_post_dynamic_code_generated()) {
2602 char blob_id[256];
2603 jio_snprintf(blob_id,
2604 sizeof(blob_id),
2605 "%s(%s)",
2606 new_adapter->name(),
2607 entry->fingerprint()->as_string());
2608 if (Forte::is_enabled()) {
2609 Forte::register_stub(blob_id, new_adapter->content_begin(), new_adapter->content_end());
2610 }
2611
2612 if (JvmtiExport::should_post_dynamic_code_generated()) {
2613 JvmtiExport::post_dynamic_code_generated(blob_id, new_adapter->content_begin(), new_adapter->content_end());
2614 }
2615 }
2616 }
2617
2618 void AdapterHandlerLibrary::create_abstract_method_handler() {
2619 assert_lock_strong(AdapterHandlerLibrary_lock);
2620 // Create a special handler for abstract methods. Abstract methods
2621 // are never compiled so an i2c entry is somewhat meaningless, but
2622 // throw AbstractMethodError just in case.
2623 // Pass wrong_method_abstract for the c2i transitions to return
2624 // AbstractMethodError for invalid invocations.
2625 address wrong_method_abstract = SharedRuntime::get_handle_wrong_method_abstract_stub();
2626 _abstract_method_handler = AdapterHandlerLibrary::new_entry(AdapterFingerPrint::allocate(nullptr));
2627 _abstract_method_handler->set_entry_points(SharedRuntime::throw_AbstractMethodError_entry(),
2628 wrong_method_abstract, wrong_method_abstract, wrong_method_abstract,
2629 wrong_method_abstract, wrong_method_abstract);
2630 }
2631
2632 void AdapterHandlerLibrary::initialize() {
2633 {
2634 ResourceMark rm;
2635 MutexLocker mu(AdapterHandlerLibrary_lock);
2636 _adapter_handler_table = new (mtCode) AdapterHandlerTable();
2637 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size);
2638 create_abstract_method_handler();
2639 }
2640
2641 #if INCLUDE_CDS
2642 // Link adapters in AOT Cache to their code in AOT Code Cache
2643 if (AOTCodeCache::is_using_adapter() && !_aot_adapter_handler_table.empty()) {
2644 link_aot_adapters();
2645 lookup_simple_adapters();
2646 return;
2647 }
2648 #endif // INCLUDE_CDS
2649
2650 ResourceMark rm;
2651 AdapterBlob* no_arg_blob = nullptr;
2652 AdapterBlob* int_arg_blob = nullptr;
2653 AdapterBlob* obj_arg_blob = nullptr;
2654 AdapterBlob* obj_int_arg_blob = nullptr;
2655 AdapterBlob* obj_obj_arg_blob = nullptr;
2656 {
2657 MutexLocker mu(AdapterHandlerLibrary_lock);
2658
2659 CompiledEntrySignature no_args;
2660 no_args.compute_calling_conventions();
2661 _no_arg_handler = create_adapter(no_arg_blob, no_args, true);
2662
2663 CompiledEntrySignature obj_args;
2664 SigEntry::add_entry(obj_args.sig(), T_OBJECT);
2665 obj_args.compute_calling_conventions();
2666 _obj_arg_handler = create_adapter(obj_arg_blob, obj_args, true);
2667
2668 CompiledEntrySignature int_args;
2669 SigEntry::add_entry(int_args.sig(), T_INT);
2670 int_args.compute_calling_conventions();
2671 _int_arg_handler = create_adapter(int_arg_blob, int_args, true);
2672
2673 CompiledEntrySignature obj_int_args;
2674 SigEntry::add_entry(obj_int_args.sig(), T_OBJECT);
2675 SigEntry::add_entry(obj_int_args.sig(), T_INT);
2676 obj_int_args.compute_calling_conventions();
2677 _obj_int_arg_handler = create_adapter(obj_int_arg_blob, obj_int_args, true);
2678
2679 CompiledEntrySignature obj_obj_args;
2680 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
2681 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
2682 obj_obj_args.compute_calling_conventions();
2683 _obj_obj_arg_handler = create_adapter(obj_obj_arg_blob, obj_obj_args, true);
2684
2685 assert(no_arg_blob != nullptr &&
2686 obj_arg_blob != nullptr &&
2687 int_arg_blob != nullptr &&
2688 obj_int_arg_blob != nullptr &&
2689 obj_obj_arg_blob != nullptr, "Initial adapters must be properly created");
2690 }
2691
2692 // Outside of the lock
2693 post_adapter_creation(no_arg_blob, _no_arg_handler);
2694 post_adapter_creation(obj_arg_blob, _obj_arg_handler);
2695 post_adapter_creation(int_arg_blob, _int_arg_handler);
2696 post_adapter_creation(obj_int_arg_blob, _obj_int_arg_handler);
2697 post_adapter_creation(obj_obj_arg_blob, _obj_obj_arg_handler);
2698 }
2699
2700 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint) {
2701 return AdapterHandlerEntry::allocate(fingerprint);
2702 }
2703
2704 AdapterHandlerEntry* AdapterHandlerLibrary::get_simple_adapter(const methodHandle& method) {
2705 if (method->is_abstract()) {
2706 return nullptr;
2707 }
2708 int total_args_passed = method->size_of_parameters(); // All args on stack
2709 if (total_args_passed == 0) {
2710 return _no_arg_handler;
2711 } else if (total_args_passed == 1) {
2712 if (!method->is_static()) {
2713 if (InlineTypePassFieldsAsArgs && method->method_holder()->is_inline_klass()) {
2714 return nullptr;
2715 }
2716 return _obj_arg_handler;
2717 }
2718 switch (method->signature()->char_at(1)) {
2719 case JVM_SIGNATURE_CLASS: {
2720 if (InlineTypePassFieldsAsArgs) {
2721 SignatureStream ss(method->signature());
2722 InlineKlass* vk = ss.as_inline_klass(method->method_holder());
2723 if (vk != nullptr) {
2724 return nullptr;
2725 }
2726 }
2727 return _obj_arg_handler;
2728 }
2729 case JVM_SIGNATURE_ARRAY:
2730 return _obj_arg_handler;
2731 case JVM_SIGNATURE_INT:
2732 case JVM_SIGNATURE_BOOLEAN:
2733 case JVM_SIGNATURE_CHAR:
2734 case JVM_SIGNATURE_BYTE:
2735 case JVM_SIGNATURE_SHORT:
2736 return _int_arg_handler;
2737 }
2738 } else if (total_args_passed == 2 &&
2739 !method->is_static() && (!InlineTypePassFieldsAsArgs || !method->method_holder()->is_inline_klass())) {
2740 switch (method->signature()->char_at(1)) {
2741 case JVM_SIGNATURE_CLASS: {
2742 if (InlineTypePassFieldsAsArgs) {
2743 SignatureStream ss(method->signature());
2744 InlineKlass* vk = ss.as_inline_klass(method->method_holder());
2745 if (vk != nullptr) {
2746 return nullptr;
2747 }
2748 }
2749 return _obj_obj_arg_handler;
2750 }
2751 case JVM_SIGNATURE_ARRAY:
2752 return _obj_obj_arg_handler;
2753 case JVM_SIGNATURE_INT:
2754 case JVM_SIGNATURE_BOOLEAN:
2755 case JVM_SIGNATURE_CHAR:
2756 case JVM_SIGNATURE_BYTE:
2757 case JVM_SIGNATURE_SHORT:
2758 return _obj_int_arg_handler;
2759 }
2760 }
2761 return nullptr;
2762 }
2763
2764 CompiledEntrySignature::CompiledEntrySignature(Method* method) :
2765 _method(method), _num_inline_args(0), _has_inline_recv(false),
2766 _regs(nullptr), _regs_cc(nullptr), _regs_cc_ro(nullptr),
2767 _args_on_stack(0), _args_on_stack_cc(0), _args_on_stack_cc_ro(0),
2768 _c1_needs_stack_repair(false), _c2_needs_stack_repair(false), _supers(nullptr) {
2769 _sig = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2770 _sig_cc = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2771 _sig_cc_ro = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2772 }
2773
2774 // See if we can save space by sharing the same entry for VIEP and VIEP(RO),
2775 // or the same entry for VEP and VIEP(RO).
2776 CodeOffsets::Entries CompiledEntrySignature::c1_inline_ro_entry_type() const {
2777 if (!has_scalarized_args()) {
2778 // VEP/VIEP/VIEP(RO) all share the same entry. There's no packing.
2779 return CodeOffsets::Verified_Entry;
2780 }
2781 if (_method->is_static()) {
2782 // Static methods don't need VIEP(RO)
2783 return CodeOffsets::Verified_Entry;
2784 }
2785
2786 if (has_inline_recv()) {
2787 if (num_inline_args() == 1) {
2788 // Share same entry for VIEP and VIEP(RO).
2789 // This is quite common: we have an instance method in an InlineKlass that has
2790 // no inline type args other than <this>.
2791 return CodeOffsets::Verified_Inline_Entry;
2792 } else {
2793 assert(num_inline_args() > 1, "must be");
2794 // No sharing:
2795 // VIEP(RO) -- <this> is passed as object
2796 // VEP -- <this> is passed as fields
2797 return CodeOffsets::Verified_Inline_Entry_RO;
2798 }
2799 }
2800
2801 // Either a static method, or <this> is not an inline type
2802 if (args_on_stack_cc() != args_on_stack_cc_ro()) {
2803 // No sharing:
2804 // Some arguments are passed on the stack, and we have inserted reserved entries
2805 // into the VEP, but we never insert reserved entries into the VIEP(RO).
2806 return CodeOffsets::Verified_Inline_Entry_RO;
2807 } else {
2808 // Share same entry for VEP and VIEP(RO).
2809 return CodeOffsets::Verified_Entry;
2810 }
2811 }
2812
2813 // Returns all super methods (transitive) in classes and interfaces that are overridden by the current method.
2814 GrowableArray<Method*>* CompiledEntrySignature::get_supers() {
2815 if (_supers != nullptr) {
2816 return _supers;
2817 }
2818 _supers = new GrowableArray<Method*>();
2819 // Skip private, static, and <init> methods
2820 if (_method->is_private() || _method->is_static() || _method->is_object_constructor()) {
2821 return _supers;
2822 }
2823 Symbol* name = _method->name();
2824 Symbol* signature = _method->signature();
2825 const Klass* holder = _method->method_holder()->super();
2826 Symbol* holder_name = holder->name();
2827 ThreadInVMfromUnknown tiv;
2828 JavaThread* current = JavaThread::current();
2829 HandleMark hm(current);
2830 Handle loader(current, _method->method_holder()->class_loader());
2831
2832 // Walk up the class hierarchy and search for super methods
2833 while (holder != nullptr) {
2834 Method* super_method = holder->lookup_method(name, signature);
2835 if (super_method == nullptr) {
2836 break;
2837 }
2838 if (!super_method->is_static() && !super_method->is_private() &&
2839 (!super_method->is_package_private() ||
2840 super_method->method_holder()->is_same_class_package(loader(), holder_name))) {
2841 _supers->push(super_method);
2842 }
2843 holder = super_method->method_holder()->super();
2844 }
2845 // Search interfaces for super methods
2846 Array<InstanceKlass*>* interfaces = _method->method_holder()->transitive_interfaces();
2847 for (int i = 0; i < interfaces->length(); ++i) {
2848 Method* m = interfaces->at(i)->lookup_method(name, signature);
2849 if (m != nullptr && !m->is_static() && m->is_public()) {
2850 _supers->push(m);
2851 }
2852 }
2853 return _supers;
2854 }
2855
2856 // Iterate over arguments and compute scalarized and non-scalarized signatures
2857 void CompiledEntrySignature::compute_calling_conventions(bool init) {
2858 bool has_scalarized = false;
2859 if (_method != nullptr) {
2860 InstanceKlass* holder = _method->method_holder();
2861 int arg_num = 0;
2862 if (!_method->is_static()) {
2863 // We shouldn't scalarize 'this' in a value class constructor
2864 if (holder->is_inline_klass() && InlineKlass::cast(holder)->can_be_passed_as_fields() && !_method->is_object_constructor() &&
2865 (init || _method->is_scalarized_arg(arg_num))) {
2866 _sig_cc->appendAll(InlineKlass::cast(holder)->extended_sig());
2867 has_scalarized = true;
2868 _has_inline_recv = true;
2869 _num_inline_args++;
2870 } else {
2871 SigEntry::add_entry(_sig_cc, T_OBJECT, holder->name());
2872 }
2873 SigEntry::add_entry(_sig, T_OBJECT, holder->name());
2874 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, holder->name());
2875 arg_num++;
2876 }
2877 for (SignatureStream ss(_method->signature()); !ss.at_return_type(); ss.next()) {
2878 BasicType bt = ss.type();
2879 if (bt == T_OBJECT) {
2880 InlineKlass* vk = ss.as_inline_klass(holder);
2881 if (vk != nullptr && vk->can_be_passed_as_fields() && (init || _method->is_scalarized_arg(arg_num))) {
2882 // Check for a calling convention mismatch with super method(s)
2883 bool scalar_super = false;
2884 bool non_scalar_super = false;
2885 GrowableArray<Method*>* supers = get_supers();
2886 for (int i = 0; i < supers->length(); ++i) {
2887 Method* super_method = supers->at(i);
2888 if (super_method->is_scalarized_arg(arg_num)) {
2889 scalar_super = true;
2890 } else {
2891 non_scalar_super = true;
2892 }
2893 }
2894 #ifdef ASSERT
2895 // Randomly enable below code paths for stress testing
2896 bool stress = init && StressCallingConvention;
2897 if (stress && (os::random() & 1) == 1) {
2898 non_scalar_super = true;
2899 if ((os::random() & 1) == 1) {
2900 scalar_super = true;
2901 }
2902 }
2903 #endif
2904 if (non_scalar_super) {
2905 // Found a super method with a non-scalarized argument. Fall back to the non-scalarized calling convention.
2906 if (scalar_super) {
2907 // Found non-scalar *and* scalar super methods. We can't handle both.
2908 // Mark the scalar method as mismatch and re-compile call sites to use non-scalarized calling convention.
2909 for (int i = 0; i < supers->length(); ++i) {
2910 Method* super_method = supers->at(i);
2911 if (super_method->is_scalarized_arg(arg_num) DEBUG_ONLY(|| (stress && (os::random() & 1) == 1))) {
2912 super_method->set_mismatch();
2913 MutexLocker ml(Compile_lock, Mutex::_safepoint_check_flag);
2914 JavaThread* thread = JavaThread::current();
2915 HandleMark hm(thread);
2916 methodHandle mh(thread, super_method);
2917 DeoptimizationScope deopt_scope;
2918 CodeCache::mark_for_deoptimization(&deopt_scope, mh());
2919 deopt_scope.deoptimize_marked();
2920 }
2921 }
2922 }
2923 // Fall back to non-scalarized calling convention
2924 SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
2925 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
2926 } else {
2927 _num_inline_args++;
2928 has_scalarized = true;
2929 int last = _sig_cc->length();
2930 int last_ro = _sig_cc_ro->length();
2931 _sig_cc->appendAll(vk->extended_sig());
2932 _sig_cc_ro->appendAll(vk->extended_sig());
2933 if (bt == T_OBJECT) {
2934 // Nullable inline type argument, insert InlineTypeNode::NullMarker field right after T_METADATA delimiter
2935 _sig_cc->insert_before(last+1, SigEntry(T_BOOLEAN, -1, nullptr, true));
2936 _sig_cc_ro->insert_before(last_ro+1, SigEntry(T_BOOLEAN, -1, nullptr, true));
2937 }
2938 }
2939 } else {
2940 SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
2941 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
2942 }
2943 bt = T_OBJECT;
2944 } else {
2945 SigEntry::add_entry(_sig_cc, ss.type(), ss.as_symbol());
2946 SigEntry::add_entry(_sig_cc_ro, ss.type(), ss.as_symbol());
2947 }
2948 SigEntry::add_entry(_sig, bt, ss.as_symbol());
2949 if (bt != T_VOID) {
2950 arg_num++;
2951 }
2952 }
2953 }
2954
2955 // Compute the non-scalarized calling convention
2956 _regs = NEW_RESOURCE_ARRAY(VMRegPair, _sig->length());
2957 _args_on_stack = SharedRuntime::java_calling_convention(_sig, _regs);
2958
2959 // Compute the scalarized calling conventions if there are scalarized inline types in the signature
2960 if (has_scalarized && !_method->is_native()) {
2961 _regs_cc = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc->length());
2962 _args_on_stack_cc = SharedRuntime::java_calling_convention(_sig_cc, _regs_cc);
2963
2964 _regs_cc_ro = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc_ro->length());
2965 _args_on_stack_cc_ro = SharedRuntime::java_calling_convention(_sig_cc_ro, _regs_cc_ro);
2966
2967 _c1_needs_stack_repair = (_args_on_stack_cc < _args_on_stack) || (_args_on_stack_cc_ro < _args_on_stack);
2968 _c2_needs_stack_repair = (_args_on_stack_cc > _args_on_stack) || (_args_on_stack_cc > _args_on_stack_cc_ro);
2969
2970 // Upper bound on stack arguments to avoid hitting the argument limit and
2971 // bailing out of compilation ("unsupported incoming calling sequence").
2972 // TODO we need a reasonable limit (flag?) here
2973 if (MAX2(_args_on_stack_cc, _args_on_stack_cc_ro) <= 60) {
2974 return; // Success
2975 }
2976 }
2977
2978 // No scalarized args
2979 _sig_cc = _sig;
2980 _regs_cc = _regs;
2981 _args_on_stack_cc = _args_on_stack;
2982
2983 _sig_cc_ro = _sig;
2984 _regs_cc_ro = _regs;
2985 _args_on_stack_cc_ro = _args_on_stack;
2986 }
2987
2988 void CompiledEntrySignature::initialize_from_fingerprint(AdapterFingerPrint* fingerprint) {
2989 int value_object_count = 0;
2990 bool is_receiver = true;
2991 BasicType prev_bt = T_ILLEGAL;
2992 bool long_prev = false;
2993 bool has_scalarized_arguments = false;
2994
2995 fingerprint->iterate_args([&] (int arg) {
2996 BasicType bt = (BasicType)arg;
2997 if (long_prev) {
2998 long_prev = false;
2999 BasicType bt_to_add;
3000 if (bt == T_VOID) {
3001 bt_to_add = T_LONG;
3002 } else {
3003 bt_to_add = T_OBJECT; // it could be T_ARRAY; it shouldn't matter
3004 }
3005 SigEntry::add_entry(_sig_cc, bt_to_add);
3006 SigEntry::add_entry(_sig_cc_ro, bt_to_add);
3007 if (value_object_count == 0) {
3008 SigEntry::add_entry(_sig, bt_to_add);
3009 }
3010 }
3011 switch (bt) {
3012 case T_VOID:
3013 if (is_receiver) {
3014 // 'this' when ro adapter is available
3015 assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
3016 value_object_count++;
3017 has_scalarized_arguments = true;
3018 _has_inline_recv = true;
3019 SigEntry::add_entry(_sig, T_OBJECT);
3020 SigEntry::add_entry(_sig_cc, T_METADATA);
3021 SigEntry::add_entry(_sig_cc_ro, T_METADATA);
3022 } else if (prev_bt != T_LONG && prev_bt != T_DOUBLE) {
3023 assert(InlineTypePassFieldsAsArgs, "unexpected end of inline type");
3024 value_object_count--;
3025 SigEntry::add_entry(_sig_cc, T_VOID);
3026 SigEntry::add_entry(_sig_cc_ro, T_VOID);
3027 assert(value_object_count >= 0, "invalid value object count");
3028 } else {
3029 // Nothing to add for _sig: We already added an addition T_VOID in add_entry() when adding T_LONG or T_DOUBLE.
3030 }
3031 break;
3032 case T_INT:
3033 case T_FLOAT:
3034 case T_DOUBLE:
3035 if (value_object_count == 0) {
3036 SigEntry::add_entry(_sig, bt);
3037 }
3038 SigEntry::add_entry(_sig_cc, bt);
3039 SigEntry::add_entry(_sig_cc_ro, bt);
3040 break;
3041 case T_LONG:
3042 long_prev = true;
3043 break;
3044 case T_BOOLEAN:
3045 case T_CHAR:
3046 case T_BYTE:
3047 case T_SHORT:
3048 case T_OBJECT:
3049 case T_ARRAY:
3050 assert(value_object_count > 0 && !is_receiver, "must be value object field");
3051 SigEntry::add_entry(_sig_cc, bt);
3052 SigEntry::add_entry(_sig_cc_ro, bt);
3053 break;
3054 case T_METADATA:
3055 assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
3056 value_object_count++;
3057 has_scalarized_arguments = true;
3058 SigEntry::add_entry(_sig, T_OBJECT);
3059 SigEntry::add_entry(_sig_cc, T_METADATA);
3060 SigEntry::add_entry(_sig_cc_ro, T_METADATA);
3061 break;
3062 default: {
3063 fatal("Unexpected BasicType: %s", basictype_to_str(bt));
3064 }
3065 }
3066 prev_bt = bt;
3067 is_receiver = false;
3068 });
3069
3070 if (long_prev) {
3071 // If previous bt was T_LONG and we reached the end of the signature, we know that it must be a T_OBJECT.
3072 SigEntry::add_entry(_sig, T_OBJECT);
3073 SigEntry::add_entry(_sig_cc, T_OBJECT);
3074 SigEntry::add_entry(_sig_cc_ro, T_OBJECT);
3075 }
3076 assert(value_object_count == 0, "invalid value object count");
3077
3078 _regs = NEW_RESOURCE_ARRAY(VMRegPair, _sig->length());
3079 _args_on_stack = SharedRuntime::java_calling_convention(_sig, _regs);
3080
3081 // Compute the scalarized calling conventions if there are scalarized inline types in the signature
3082 if (has_scalarized_arguments) {
3083 _regs_cc = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc->length());
3084 _args_on_stack_cc = SharedRuntime::java_calling_convention(_sig_cc, _regs_cc);
3085
3086 _regs_cc_ro = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc_ro->length());
3087 _args_on_stack_cc_ro = SharedRuntime::java_calling_convention(_sig_cc_ro, _regs_cc_ro);
3088
3089 _c1_needs_stack_repair = (_args_on_stack_cc < _args_on_stack) || (_args_on_stack_cc_ro < _args_on_stack);
3090 _c2_needs_stack_repair = (_args_on_stack_cc > _args_on_stack) || (_args_on_stack_cc > _args_on_stack_cc_ro);
3091 } else {
3092 // No scalarized args
3093 _sig_cc = _sig;
3094 _regs_cc = _regs;
3095 _args_on_stack_cc = _args_on_stack;
3096
3097 _sig_cc_ro = _sig;
3098 _regs_cc_ro = _regs;
3099 _args_on_stack_cc_ro = _args_on_stack;
3100 }
3101
3102 #ifdef ASSERT
3103 {
3104 AdapterFingerPrint* compare_fp = AdapterFingerPrint::allocate(_sig_cc, _has_inline_recv);
3105 assert(fingerprint->equals(compare_fp), "sanity check");
3106 AdapterFingerPrint::deallocate(compare_fp);
3107 }
3108 #endif
3109 }
3110
3111 const char* AdapterHandlerEntry::_entry_names[] = {
3112 "i2c", "c2i", "c2i_unverified", "c2i_no_clinit_check"
3113 };
3114
3115 #ifdef ASSERT
3116 void AdapterHandlerLibrary::verify_adapter_sharing(CompiledEntrySignature& ces, AdapterHandlerEntry* cached_entry) {
3117 AdapterBlob* comparison_blob = nullptr;
3118 AdapterHandlerEntry* comparison_entry = create_adapter(comparison_blob, ces, false, true);
3119 assert(comparison_blob == nullptr, "no blob should be created when creating an adapter for comparison");
3120 assert(comparison_entry->compare_code(cached_entry), "code must match");
3121 // Release the one just created
3122 AdapterHandlerEntry::deallocate(comparison_entry);
3123 }
3124 #endif /* ASSERT*/
3125
3126 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
3127 // Use customized signature handler. Need to lock around updates to
3128 // the _adapter_handler_table (it is not safe for concurrent readers
3129 // and a single writer: this could be fixed if it becomes a
3130 // problem).
3131
3132 // Fast-path for trivial adapters
3133 AdapterHandlerEntry* entry = get_simple_adapter(method);
3134 if (entry != nullptr) {
3135 return entry;
3136 }
3137
3138 ResourceMark rm;
3139 AdapterBlob* adapter_blob = nullptr;
3140
3141 CompiledEntrySignature ces(method());
3142 ces.compute_calling_conventions();
3143 if (ces.has_scalarized_args()) {
3144 if (!method->has_scalarized_args()) {
3145 method->set_has_scalarized_args();
3146 }
3147 if (ces.c1_needs_stack_repair()) {
3148 method->set_c1_needs_stack_repair();
3149 }
3150 if (ces.c2_needs_stack_repair() && !method->c2_needs_stack_repair()) {
3151 method->set_c2_needs_stack_repair();
3152 }
3153 } else if (method->is_abstract()) {
3154 return _abstract_method_handler;
3155 }
3156
3157 {
3158 MutexLocker mu(AdapterHandlerLibrary_lock);
3159
3160 if (ces.has_scalarized_args() && method->is_abstract()) {
3161 // Save a C heap allocated version of the signature for abstract methods with scalarized inline type arguments
3162 address wrong_method_abstract = SharedRuntime::get_handle_wrong_method_abstract_stub();
3163 entry = AdapterHandlerLibrary::new_entry(AdapterFingerPrint::allocate(nullptr));
3164 entry->set_entry_points(SharedRuntime::throw_AbstractMethodError_entry(),
3165 wrong_method_abstract, wrong_method_abstract, wrong_method_abstract,
3166 wrong_method_abstract, wrong_method_abstract);
3167 GrowableArray<SigEntry>* heap_sig = new (mtInternal) GrowableArray<SigEntry>(ces.sig_cc_ro()->length(), mtInternal);
3168 heap_sig->appendAll(ces.sig_cc_ro());
3169 entry->set_sig_cc(heap_sig);
3170 return entry;
3171 }
3172
3173 // Lookup method signature's fingerprint
3174 entry = lookup(ces.sig_cc(), ces.has_inline_recv());
3175
3176 if (entry != nullptr) {
3177 assert(entry->is_linked(), "AdapterHandlerEntry must have been linked");
3178 #ifdef ASSERT
3179 if (!entry->is_shared() && VerifyAdapterSharing) {
3180 verify_adapter_sharing(ces, entry);
3181 }
3182 #endif
3183 } else {
3184 entry = create_adapter(adapter_blob, ces, /* allocate_code_blob */ true);
3185 }
3186 }
3187
3188 // Outside of the lock
3189 if (adapter_blob != nullptr) {
3190 post_adapter_creation(adapter_blob, entry);
3191 }
3192 return entry;
3193 }
3194
3195 AdapterBlob* AdapterHandlerLibrary::lookup_aot_cache(AdapterHandlerEntry* handler) {
3196 ResourceMark rm;
3197 const char* name = AdapterHandlerLibrary::name(handler->fingerprint());
3198 const uint32_t id = AdapterHandlerLibrary::id(handler->fingerprint());
3199 int offsets[AdapterHandlerEntry::ENTRIES_COUNT];
3200
3201 AdapterBlob* adapter_blob = nullptr;
3202 CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::Adapter, id, name, AdapterHandlerEntry::ENTRIES_COUNT, offsets);
3203 if (blob != nullptr) {
3204 adapter_blob = blob->as_adapter_blob();
3205 address i2c_entry = adapter_blob->content_begin();
3206 assert(offsets[0] == 0, "sanity check");
3207 handler->set_entry_points(i2c_entry, i2c_entry + offsets[1], i2c_entry + offsets[2], i2c_entry + offsets[3],
3208 i2c_entry + offsets[4], i2c_entry + offsets[5], i2c_entry + offsets[6]);
3209 }
3210 return adapter_blob;
3211 }
3212
3213 #ifndef PRODUCT
3214 void AdapterHandlerLibrary::print_adapter_handler_info(outputStream* st, AdapterHandlerEntry* handler, AdapterBlob* adapter_blob) {
3215 ttyLocker ttyl;
3216 ResourceMark rm;
3217 int insts_size = adapter_blob->code_size();
3218 handler->print_adapter_on(tty);
3219 st->print_cr("i2c argument handler for: %s %s (%d bytes generated)",
3220 handler->fingerprint()->as_basic_args_string(),
3221 handler->fingerprint()->as_string(), insts_size);
3222 st->print_cr("c2i argument handler starts at " INTPTR_FORMAT, p2i(handler->get_c2i_entry()));
3223 if (Verbose || PrintStubCode) {
3224 address first_pc = handler->base_address();
3225 if (first_pc != nullptr) {
3226 Disassembler::decode(first_pc, first_pc + insts_size, st, &adapter_blob->asm_remarks());
3227 st->cr();
3228 }
3229 }
3230 }
3231 #endif // PRODUCT
3232
3233 bool AdapterHandlerLibrary::generate_adapter_code(AdapterBlob*& adapter_blob,
3234 AdapterHandlerEntry* handler,
3235 CompiledEntrySignature& ces,
3236 bool allocate_code_blob,
3237 bool is_transient) {
3238 if (log_is_enabled(Info, perf, class, link)) {
3239 ClassLoader::perf_method_adapters_count()->inc();
3240 }
3241
3242 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
3243 CodeBuffer buffer(buf);
3244 short buffer_locs[20];
3245 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
3246 sizeof(buffer_locs)/sizeof(relocInfo));
3247 MacroAssembler masm(&buffer);
3248
3249 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage
3250 SharedRuntime::generate_i2c2i_adapters(&masm,
3251 ces.args_on_stack(),
3252 ces.sig(),
3253 ces.regs(),
3254 ces.sig_cc(),
3255 ces.regs_cc(),
3256 ces.sig_cc_ro(),
3257 ces.regs_cc_ro(),
3258 handler,
3259 adapter_blob,
3260 allocate_code_blob);
3261
3262 if (ces.has_scalarized_args()) {
3263 // Save a C heap allocated version of the scalarized signature and store it in the adapter
3264 GrowableArray<SigEntry>* heap_sig = new (mtInternal) GrowableArray<SigEntry>(ces.sig_cc()->length(), mtInternal);
3265 heap_sig->appendAll(ces.sig_cc());
3266 handler->set_sig_cc(heap_sig);
3267 }
3268 #ifdef ASSERT
3269 if (VerifyAdapterSharing) {
3270 handler->save_code(buf->code_begin(), buffer.insts_size());
3271 if (is_transient) {
3272 return true;
3273 }
3274 }
3275 #endif
3276
3277 if (adapter_blob == nullptr) {
3278 // CodeCache is full, disable compilation
3279 // Ought to log this but compile log is only per compile thread
3280 // and we're some non descript Java thread.
3281 return false;
3282 }
3283 if (!is_transient && AOTCodeCache::is_dumping_adapter()) {
3284 // try to save generated code
3285 const char* name = AdapterHandlerLibrary::name(handler->fingerprint());
3286 const uint32_t id = AdapterHandlerLibrary::id(handler->fingerprint());
3287 int entry_offset[AdapterHandlerEntry::ENTRIES_COUNT];
3288 assert(AdapterHandlerEntry::ENTRIES_COUNT == 7, "sanity");
3289 address i2c_entry = handler->get_i2c_entry();
3290 entry_offset[0] = 0; // i2c_entry offset
3291 entry_offset[1] = handler->get_c2i_entry() - i2c_entry;
3292 entry_offset[2] = handler->get_c2i_inline_entry() - i2c_entry;
3293 entry_offset[3] = handler->get_c2i_inline_ro_entry() - i2c_entry;
3294 entry_offset[4] = handler->get_c2i_unverified_entry() - i2c_entry;
3295 entry_offset[5] = handler->get_c2i_unverified_inline_entry() - i2c_entry;
3296 entry_offset[6] = handler->get_c2i_no_clinit_check_entry() - i2c_entry;
3297 bool success = AOTCodeCache::store_code_blob(*adapter_blob, AOTCodeEntry::Adapter, id, name, AdapterHandlerEntry::ENTRIES_COUNT, entry_offset);
3298 assert(success || !AOTCodeCache::is_dumping_adapter(), "caching of adapter must be disabled");
3299 }
3300 handler->relocate(adapter_blob->content_begin());
3301 #ifndef PRODUCT
3302 // debugging support
3303 if (PrintAdapterHandlers || PrintStubCode) {
3304 print_adapter_handler_info(tty, handler, adapter_blob);
3305 }
3306 #endif
3307 return true;
3308 }
3309
3310 AdapterHandlerEntry* AdapterHandlerLibrary::create_adapter(AdapterBlob*& adapter_blob,
3311 CompiledEntrySignature& ces,
3312 bool allocate_code_blob,
3313 bool is_transient) {
3314 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(ces.sig_cc(), ces.has_inline_recv());
3315 #ifdef ASSERT
3316 // Verify that we can successfully restore the compiled entry signature object.
3317 CompiledEntrySignature ces_verify;
3318 ces_verify.initialize_from_fingerprint(fp);
3319 #endif
3320 AdapterHandlerEntry* handler = AdapterHandlerLibrary::new_entry(fp);
3321 if (!generate_adapter_code(adapter_blob, handler, ces, allocate_code_blob, is_transient)) {
3322 AdapterHandlerEntry::deallocate(handler);
3323 return nullptr;
3324 }
3325 if (!is_transient) {
3326 assert_lock_strong(AdapterHandlerLibrary_lock);
3327 _adapter_handler_table->put(fp, handler);
3328 }
3329 return handler;
3330 }
3331
3332 #if INCLUDE_CDS
3333 void AdapterHandlerEntry::remove_unshareable_info() {
3334 #ifdef ASSERT
3335 _saved_code = nullptr;
3336 _saved_code_length = 0;
3337 #endif // ASSERT
3338 set_entry_points(nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, false);
3339 }
3340
3341 class CopyAdapterTableToArchive : StackObj {
3342 private:
3343 CompactHashtableWriter* _writer;
3344 ArchiveBuilder* _builder;
3345 public:
3346 CopyAdapterTableToArchive(CompactHashtableWriter* writer) : _writer(writer),
3347 _builder(ArchiveBuilder::current())
3348 {}
3349
3350 bool do_entry(AdapterFingerPrint* fp, AdapterHandlerEntry* entry) {
3351 LogStreamHandle(Trace, aot) lsh;
3352 if (ArchiveBuilder::current()->has_been_archived((address)entry)) {
3353 assert(ArchiveBuilder::current()->has_been_archived((address)fp), "must be");
3354 AdapterFingerPrint* buffered_fp = ArchiveBuilder::current()->get_buffered_addr(fp);
3355 assert(buffered_fp != nullptr,"sanity check");
3356 AdapterHandlerEntry* buffered_entry = ArchiveBuilder::current()->get_buffered_addr(entry);
3357 assert(buffered_entry != nullptr,"sanity check");
3358
3359 uint hash = fp->compute_hash();
3360 u4 delta = _builder->buffer_to_offset_u4((address)buffered_entry);
3361 _writer->add(hash, delta);
3362 if (lsh.is_enabled()) {
3363 address fp_runtime_addr = (address)buffered_fp + ArchiveBuilder::current()->buffer_to_requested_delta();
3364 address entry_runtime_addr = (address)buffered_entry + ArchiveBuilder::current()->buffer_to_requested_delta();
3365 log_trace(aot)("Added fp=%p (%s), entry=%p to the archived adater table", buffered_fp, buffered_fp->as_basic_args_string(), buffered_entry);
3366 }
3367 } else {
3368 if (lsh.is_enabled()) {
3369 log_trace(aot)("Skipping adapter handler %p (fp=%s) as it is not archived", entry, fp->as_basic_args_string());
3370 }
3371 }
3372 return true;
3373 }
3374 };
3375
3376 void AdapterHandlerLibrary::dump_aot_adapter_table() {
3377 CompactHashtableStats stats;
3378 CompactHashtableWriter writer(_adapter_handler_table->number_of_entries(), &stats);
3379 CopyAdapterTableToArchive copy(&writer);
3380 _adapter_handler_table->iterate(©);
3381 writer.dump(&_aot_adapter_handler_table, "archived adapter table");
3382 }
3383
3384 void AdapterHandlerLibrary::serialize_shared_table_header(SerializeClosure* soc) {
3385 _aot_adapter_handler_table.serialize_header(soc);
3386 }
3387
3388 AdapterBlob* AdapterHandlerLibrary::link_aot_adapter_handler(AdapterHandlerEntry* handler) {
3389 #ifdef ASSERT
3390 if (TestAOTAdapterLinkFailure) {
3391 return nullptr;
3392 }
3393 #endif
3394 AdapterBlob* blob = lookup_aot_cache(handler);
3395 #ifndef PRODUCT
3396 // debugging support
3397 if ((blob != nullptr) && (PrintAdapterHandlers || PrintStubCode)) {
3398 print_adapter_handler_info(tty, handler, blob);
3399 }
3400 #endif
3401 return blob;
3402 }
3403
3404 // This method is used during production run to link archived adapters (stored in AOT Cache)
3405 // to their code in AOT Code Cache
3406 void AdapterHandlerEntry::link() {
3407 AdapterBlob* adapter_blob = nullptr;
3408 ResourceMark rm;
3409 assert(_fingerprint != nullptr, "_fingerprint must not be null");
3410 bool generate_code = false;
3411 // Generate code only if AOTCodeCache is not available, or
3412 // caching adapters is disabled, or we fail to link
3413 // the AdapterHandlerEntry to its code in the AOTCodeCache
3414 if (AOTCodeCache::is_using_adapter()) {
3415 adapter_blob = AdapterHandlerLibrary::link_aot_adapter_handler(this);
3416 if (adapter_blob == nullptr) {
3417 log_warning(aot)("Failed to link AdapterHandlerEntry (fp=%s) to its code in the AOT code cache", _fingerprint->as_basic_args_string());
3418 generate_code = true;
3419 }
3420 } else {
3421 generate_code = true;
3422 }
3423 if (generate_code) {
3424 CompiledEntrySignature ces;
3425 ces.initialize_from_fingerprint(_fingerprint);
3426 if (!AdapterHandlerLibrary::generate_adapter_code(adapter_blob, this, ces, true, false)) {
3427 // Don't throw exceptions during VM initialization because java.lang.* classes
3428 // might not have been initialized, causing problems when constructing the
3429 // Java exception object.
3430 vm_exit_during_initialization("Out of space in CodeCache for adapters");
3431 }
3432 }
3433 // Outside of the lock
3434 if (adapter_blob != nullptr) {
3435 post_adapter_creation(adapter_blob, this);
3436 }
3437 assert(_linked, "AdapterHandlerEntry must now be linked");
3438 }
3439
3440 void AdapterHandlerLibrary::link_aot_adapters() {
3441 assert(AOTCodeCache::is_using_adapter(), "AOT adapters code should be available");
3442 _aot_adapter_handler_table.iterate([](AdapterHandlerEntry* entry) {
3443 assert(!entry->is_linked(), "AdapterHandlerEntry is already linked!");
3444 entry->link();
3445 });
3446 }
3447
3448 // This method is called during production run to lookup simple adapters
3449 // in the archived adapter handler table
3450 void AdapterHandlerLibrary::lookup_simple_adapters() {
3451 assert(!_aot_adapter_handler_table.empty(), "archived adapter handler table is empty");
3452
3453 MutexLocker mu(AdapterHandlerLibrary_lock);
3454 ResourceMark rm;
3455 CompiledEntrySignature no_args;
3456 no_args.compute_calling_conventions();
3457 _no_arg_handler = lookup(no_args.sig_cc(), no_args.has_inline_recv());
3458
3459 CompiledEntrySignature obj_args;
3460 SigEntry::add_entry(obj_args.sig(), T_OBJECT);
3461 obj_args.compute_calling_conventions();
3462 _obj_arg_handler = lookup(obj_args.sig_cc(), obj_args.has_inline_recv());
3463
3464 CompiledEntrySignature int_args;
3465 SigEntry::add_entry(int_args.sig(), T_INT);
3466 int_args.compute_calling_conventions();
3467 _int_arg_handler = lookup(int_args.sig_cc(), int_args.has_inline_recv());
3468
3469 CompiledEntrySignature obj_int_args;
3470 SigEntry::add_entry(obj_int_args.sig(), T_OBJECT);
3471 SigEntry::add_entry(obj_int_args.sig(), T_INT);
3472 obj_int_args.compute_calling_conventions();
3473 _obj_int_arg_handler = lookup(obj_int_args.sig_cc(), obj_int_args.has_inline_recv());
3474
3475 CompiledEntrySignature obj_obj_args;
3476 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
3477 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
3478 obj_obj_args.compute_calling_conventions();
3479 _obj_obj_arg_handler = lookup(obj_obj_args.sig_cc(), obj_obj_args.has_inline_recv());
3480
3481 assert(_no_arg_handler != nullptr &&
3482 _obj_arg_handler != nullptr &&
3483 _int_arg_handler != nullptr &&
3484 _obj_int_arg_handler != nullptr &&
3485 _obj_obj_arg_handler != nullptr, "Initial adapters not found in archived adapter handler table");
3486 assert(_no_arg_handler->is_linked() &&
3487 _obj_arg_handler->is_linked() &&
3488 _int_arg_handler->is_linked() &&
3489 _obj_int_arg_handler->is_linked() &&
3490 _obj_obj_arg_handler->is_linked(), "Initial adapters not in linked state");
3491 }
3492 #endif // INCLUDE_CDS
3493
3494 address AdapterHandlerEntry::base_address() {
3495 address base = _i2c_entry;
3496 if (base == nullptr) base = _c2i_entry;
3497 assert(base <= _c2i_entry || _c2i_entry == nullptr, "");
3498 assert(base <= _c2i_inline_entry || _c2i_inline_entry == nullptr, "");
3499 assert(base <= _c2i_inline_ro_entry || _c2i_inline_ro_entry == nullptr, "");
3500 assert(base <= _c2i_unverified_entry || _c2i_unverified_entry == nullptr, "");
3501 assert(base <= _c2i_unverified_inline_entry || _c2i_unverified_inline_entry == nullptr, "");
3502 assert(base <= _c2i_no_clinit_check_entry || _c2i_no_clinit_check_entry == nullptr, "");
3503 return base;
3504 }
3505
3506 void AdapterHandlerEntry::relocate(address new_base) {
3507 address old_base = base_address();
3508 assert(old_base != nullptr, "");
3509 ptrdiff_t delta = new_base - old_base;
3510 if (_i2c_entry != nullptr)
3511 _i2c_entry += delta;
3512 if (_c2i_entry != nullptr)
3513 _c2i_entry += delta;
3514 if (_c2i_inline_entry != nullptr)
3515 _c2i_inline_entry += delta;
3516 if (_c2i_inline_ro_entry != nullptr)
3517 _c2i_inline_ro_entry += delta;
3518 if (_c2i_unverified_entry != nullptr)
3519 _c2i_unverified_entry += delta;
3520 if (_c2i_unverified_inline_entry != nullptr)
3521 _c2i_unverified_inline_entry += delta;
3522 if (_c2i_no_clinit_check_entry != nullptr)
3523 _c2i_no_clinit_check_entry += delta;
3524 assert(base_address() == new_base, "");
3525 }
3526
3527 void AdapterHandlerEntry::metaspace_pointers_do(MetaspaceClosure* it) {
3528 LogStreamHandle(Trace, aot) lsh;
3529 if (lsh.is_enabled()) {
3530 lsh.print("Iter(AdapterHandlerEntry): %p(%s)", this, _fingerprint->as_basic_args_string());
3531 lsh.cr();
3532 }
3533 it->push(&_fingerprint);
3534 }
3535
3536 AdapterHandlerEntry::~AdapterHandlerEntry() {
3537 if (_fingerprint != nullptr) {
3538 AdapterFingerPrint::deallocate(_fingerprint);
3539 _fingerprint = nullptr;
3540 }
3541 if (_sig_cc != nullptr) {
3542 delete _sig_cc;
3543 }
3544 #ifdef ASSERT
3545 FREE_C_HEAP_ARRAY(unsigned char, _saved_code);
3546 #endif
3547 FreeHeap(this);
3548 }
3549
3550
3551 #ifdef ASSERT
3552 // Capture the code before relocation so that it can be compared
3553 // against other versions. If the code is captured after relocation
3554 // then relative instructions won't be equivalent.
3555 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length) {
3556 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length, mtCode);
3557 _saved_code_length = length;
3558 memcpy(_saved_code, buffer, length);
3559 }
3560
3561
3562 bool AdapterHandlerEntry::compare_code(AdapterHandlerEntry* other) {
3563 assert(_saved_code != nullptr && other->_saved_code != nullptr, "code not saved");
3564
3565 if (other->_saved_code_length != _saved_code_length) {
3566 return false;
3567 }
3568
3569 return memcmp(other->_saved_code, _saved_code, _saved_code_length) == 0;
3570 }
3571 #endif
3572
3573
3574 /**
3575 * Create a native wrapper for this native method. The wrapper converts the
3576 * Java-compiled calling convention to the native convention, handles
3577 * arguments, and transitions to native. On return from the native we transition
3578 * back to java blocking if a safepoint is in progress.
3579 */
3580 void AdapterHandlerLibrary::create_native_wrapper(const methodHandle& method) {
3581 ResourceMark rm;
3582 nmethod* nm = nullptr;
3583
3584 // Check if memory should be freed before allocation
3585 CodeCache::gc_on_allocation();
3586
3587 assert(method->is_native(), "must be native");
3588 assert(method->is_special_native_intrinsic() ||
3589 method->has_native_function(), "must have something valid to call!");
3590
3591 {
3592 // Perform the work while holding the lock, but perform any printing outside the lock
3593 MutexLocker mu(AdapterHandlerLibrary_lock);
3594 // See if somebody beat us to it
3595 if (method->code() != nullptr) {
3596 return;
3597 }
3598
3599 const int compile_id = CompileBroker::assign_compile_id(method, CompileBroker::standard_entry_bci);
3600 assert(compile_id > 0, "Must generate native wrapper");
3601
3602
3603 ResourceMark rm;
3604 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
3605 if (buf != nullptr) {
3606 CodeBuffer buffer(buf);
3607
3608 if (method->is_continuation_enter_intrinsic()) {
3609 buffer.initialize_stubs_size(192);
3610 }
3611
3612 struct { double data[20]; } locs_buf;
3613 struct { double data[20]; } stubs_locs_buf;
3614 buffer.insts()->initialize_shared_locs((relocInfo*)&locs_buf, sizeof(locs_buf) / sizeof(relocInfo));
3615 #if defined(AARCH64) || defined(PPC64)
3616 // On AArch64 with ZGC and nmethod entry barriers, we need all oops to be
3617 // in the constant pool to ensure ordering between the barrier and oops
3618 // accesses. For native_wrappers we need a constant.
3619 // On PPC64 the continuation enter intrinsic needs the constant pool for the compiled
3620 // static java call that is resolved in the runtime.
3621 if (PPC64_ONLY(method->is_continuation_enter_intrinsic() &&) true) {
3622 buffer.initialize_consts_size(8 PPC64_ONLY(+ 24));
3623 }
3624 #endif
3625 buffer.stubs()->initialize_shared_locs((relocInfo*)&stubs_locs_buf, sizeof(stubs_locs_buf) / sizeof(relocInfo));
3626 MacroAssembler _masm(&buffer);
3627
3628 // Fill in the signature array, for the calling-convention call.
3629 const int total_args_passed = method->size_of_parameters();
3630
3631 BasicType stack_sig_bt[16];
3632 VMRegPair stack_regs[16];
3633 BasicType* sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
3634 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
3635
3636 int i = 0;
3637 if (!method->is_static()) { // Pass in receiver first
3638 sig_bt[i++] = T_OBJECT;
3639 }
3640 SignatureStream ss(method->signature());
3641 for (; !ss.at_return_type(); ss.next()) {
3642 sig_bt[i++] = ss.type(); // Collect remaining bits of signature
3643 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) {
3644 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots
3645 }
3646 }
3647 assert(i == total_args_passed, "");
3648 BasicType ret_type = ss.type();
3649
3650 // Now get the compiled-Java arguments layout.
3651 SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
3652
3653 // Generate the compiled-to-native wrapper code
3654 nm = SharedRuntime::generate_native_wrapper(&_masm, method, compile_id, sig_bt, regs, ret_type);
3655
3656 if (nm != nullptr) {
3657 {
3658 MutexLocker pl(NMethodState_lock, Mutex::_no_safepoint_check_flag);
3659 if (nm->make_in_use()) {
3660 method->set_code(method, nm);
3661 }
3662 }
3663
3664 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, CompileBroker::compiler(CompLevel_simple));
3665 if (directive->PrintAssemblyOption) {
3666 nm->print_code();
3667 }
3668 DirectivesStack::release(directive);
3669 }
3670 }
3671 } // Unlock AdapterHandlerLibrary_lock
3672
3673
3674 // Install the generated code.
3675 if (nm != nullptr) {
3676 const char *msg = method->is_static() ? "(static)" : "";
3677 CompileTask::print_ul(nm, msg);
3678 if (PrintCompilation) {
3679 ttyLocker ttyl;
3680 CompileTask::print(tty, nm, msg);
3681 }
3682 nm->post_compiled_method_load_event();
3683 }
3684 }
3685
3686 // -------------------------------------------------------------------------
3687 // Java-Java calling convention
3688 // (what you use when Java calls Java)
3689
3690 //------------------------------name_for_receiver----------------------------------
3691 // For a given signature, return the VMReg for parameter 0.
3692 VMReg SharedRuntime::name_for_receiver() {
3693 VMRegPair regs;
3694 BasicType sig_bt = T_OBJECT;
3695 (void) java_calling_convention(&sig_bt, ®s, 1);
3696 // Return argument 0 register. In the LP64 build pointers
3697 // take 2 registers, but the VM wants only the 'main' name.
3698 return regs.first();
3699 }
3700
3701 VMRegPair *SharedRuntime::find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int* arg_size) {
3702 // This method is returning a data structure allocating as a
3703 // ResourceObject, so do not put any ResourceMarks in here.
3704
3705 BasicType *sig_bt = NEW_RESOURCE_ARRAY(BasicType, 256);
3706 VMRegPair *regs = NEW_RESOURCE_ARRAY(VMRegPair, 256);
3707 int cnt = 0;
3708 if (has_receiver) {
3709 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature
3710 }
3711
3712 for (SignatureStream ss(sig); !ss.at_return_type(); ss.next()) {
3713 BasicType type = ss.type();
3714 sig_bt[cnt++] = type;
3715 if (is_double_word_type(type))
3716 sig_bt[cnt++] = T_VOID;
3717 }
3718
3719 if (has_appendix) {
3720 sig_bt[cnt++] = T_OBJECT;
3721 }
3722
3723 assert(cnt < 256, "grow table size");
3724
3725 int comp_args_on_stack;
3726 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt);
3727
3728 // the calling convention doesn't count out_preserve_stack_slots so
3729 // we must add that in to get "true" stack offsets.
3730
3731 if (comp_args_on_stack) {
3732 for (int i = 0; i < cnt; i++) {
3733 VMReg reg1 = regs[i].first();
3734 if (reg1->is_stack()) {
3735 // Yuck
3736 reg1 = reg1->bias(out_preserve_stack_slots());
3737 }
3738 VMReg reg2 = regs[i].second();
3739 if (reg2->is_stack()) {
3740 // Yuck
3741 reg2 = reg2->bias(out_preserve_stack_slots());
3742 }
3743 regs[i].set_pair(reg2, reg1);
3744 }
3745 }
3746
3747 // results
3748 *arg_size = cnt;
3749 return regs;
3750 }
3751
3752 // OSR Migration Code
3753 //
3754 // This code is used convert interpreter frames into compiled frames. It is
3755 // called from very start of a compiled OSR nmethod. A temp array is
3756 // allocated to hold the interesting bits of the interpreter frame. All
3757 // active locks are inflated to allow them to move. The displaced headers and
3758 // active interpreter locals are copied into the temp buffer. Then we return
3759 // back to the compiled code. The compiled code then pops the current
3760 // interpreter frame off the stack and pushes a new compiled frame. Then it
3761 // copies the interpreter locals and displaced headers where it wants.
3762 // Finally it calls back to free the temp buffer.
3763 //
3764 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed.
3765
3766 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *current) )
3767 assert(current == JavaThread::current(), "pre-condition");
3768 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
3769 // During OSR migration, we unwind the interpreted frame and replace it with a compiled
3770 // frame. The stack watermark code below ensures that the interpreted frame is processed
3771 // before it gets unwound. This is helpful as the size of the compiled frame could be
3772 // larger than the interpreted frame, which could result in the new frame not being
3773 // processed correctly.
3774 StackWatermarkSet::before_unwind(current);
3775
3776 //
3777 // This code is dependent on the memory layout of the interpreter local
3778 // array and the monitors. On all of our platforms the layout is identical
3779 // so this code is shared. If some platform lays the their arrays out
3780 // differently then this code could move to platform specific code or
3781 // the code here could be modified to copy items one at a time using
3782 // frame accessor methods and be platform independent.
3783
3784 frame fr = current->last_frame();
3785 assert(fr.is_interpreted_frame(), "");
3786 assert(fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks");
3787
3788 // Figure out how many monitors are active.
3789 int active_monitor_count = 0;
3790 for (BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
3791 kptr < fr.interpreter_frame_monitor_begin();
3792 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
3793 if (kptr->obj() != nullptr) active_monitor_count++;
3794 }
3795
3796 // QQQ we could place number of active monitors in the array so that compiled code
3797 // could double check it.
3798
3799 Method* moop = fr.interpreter_frame_method();
3800 int max_locals = moop->max_locals();
3801 // Allocate temp buffer, 1 word per local & 2 per active monitor
3802 int buf_size_words = max_locals + active_monitor_count * BasicObjectLock::size();
3803 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words, mtCode);
3804
3805 // Copy the locals. Order is preserved so that loading of longs works.
3806 // Since there's no GC I can copy the oops blindly.
3807 assert(sizeof(HeapWord)==sizeof(intptr_t), "fix this code");
3808 Copy::disjoint_words((HeapWord*)fr.interpreter_frame_local_at(max_locals-1),
3809 (HeapWord*)&buf[0],
3810 max_locals);
3811
3812 // Inflate locks. Copy the displaced headers. Be careful, there can be holes.
3813 int i = max_locals;
3814 for (BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end();
3815 kptr2 < fr.interpreter_frame_monitor_begin();
3816 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) {
3817 if (kptr2->obj() != nullptr) { // Avoid 'holes' in the monitor array
3818 BasicLock *lock = kptr2->lock();
3819 if (LockingMode == LM_LEGACY) {
3820 // Inflate so the object's header no longer refers to the BasicLock.
3821 if (lock->displaced_header().is_unlocked()) {
3822 // The object is locked and the resulting ObjectMonitor* will also be
3823 // locked so it can't be async deflated until ownership is dropped.
3824 // See the big comment in basicLock.cpp: BasicLock::move_to().
3825 ObjectSynchronizer::inflate_helper(kptr2->obj());
3826 }
3827 // Now the displaced header is free to move because the
3828 // object's header no longer refers to it.
3829 buf[i] = (intptr_t)lock->displaced_header().value();
3830 } else if (UseObjectMonitorTable) {
3831 buf[i] = (intptr_t)lock->object_monitor_cache();
3832 }
3833 #ifdef ASSERT
3834 else {
3835 buf[i] = badDispHeaderOSR;
3836 }
3837 #endif
3838 i++;
3839 buf[i++] = cast_from_oop<intptr_t>(kptr2->obj());
3840 }
3841 }
3842 assert(i - max_locals == active_monitor_count*2, "found the expected number of monitors");
3843
3844 RegisterMap map(current,
3845 RegisterMap::UpdateMap::skip,
3846 RegisterMap::ProcessFrames::include,
3847 RegisterMap::WalkContinuation::skip);
3848 frame sender = fr.sender(&map);
3849 if (sender.is_interpreted_frame()) {
3850 current->push_cont_fastpath(sender.sp());
3851 }
3852
3853 return buf;
3854 JRT_END
3855
3856 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) )
3857 FREE_C_HEAP_ARRAY(intptr_t, buf);
3858 JRT_END
3859
3860 bool AdapterHandlerLibrary::contains(const CodeBlob* b) {
3861 bool found = false;
3862 #if INCLUDE_CDS
3863 if (AOTCodeCache::is_using_adapter()) {
3864 auto findblob_archived_table = [&] (AdapterHandlerEntry* handler) {
3865 return (found = (b == CodeCache::find_blob(handler->get_i2c_entry())));
3866 };
3867 _aot_adapter_handler_table.iterate(findblob_archived_table);
3868 }
3869 #endif // INCLUDE_CDS
3870 if (!found) {
3871 auto findblob_runtime_table = [&] (AdapterFingerPrint* key, AdapterHandlerEntry* a) {
3872 return (found = (b == CodeCache::find_blob(a->get_i2c_entry())));
3873 };
3874 assert_locked_or_safepoint(AdapterHandlerLibrary_lock);
3875 _adapter_handler_table->iterate(findblob_runtime_table);
3876 }
3877 return found;
3878 }
3879
3880 const char* AdapterHandlerLibrary::name(AdapterFingerPrint* fingerprint) {
3881 return fingerprint->as_basic_args_string();
3882 }
3883
3884 uint32_t AdapterHandlerLibrary::id(AdapterFingerPrint* fingerprint) {
3885 unsigned int hash = fingerprint->compute_hash();
3886 return hash;
3887 }
3888
3889 void AdapterHandlerLibrary::print_handler_on(outputStream* st, const CodeBlob* b) {
3890 bool found = false;
3891 #if INCLUDE_CDS
3892 if (AOTCodeCache::is_using_adapter()) {
3893 auto findblob_archived_table = [&] (AdapterHandlerEntry* handler) {
3894 if (b == CodeCache::find_blob(handler->get_i2c_entry())) {
3895 found = true;
3896 st->print("Adapter for signature: ");
3897 handler->print_adapter_on(st);
3898 return true;
3899 } else {
3900 return false; // keep looking
3901 }
3902 };
3903 _aot_adapter_handler_table.iterate(findblob_archived_table);
3904 }
3905 #endif // INCLUDE_CDS
3906 if (!found) {
3907 auto findblob_runtime_table = [&] (AdapterFingerPrint* key, AdapterHandlerEntry* a) {
3908 if (b == CodeCache::find_blob(a->get_i2c_entry())) {
3909 found = true;
3910 st->print("Adapter for signature: ");
3911 a->print_adapter_on(st);
3912 return true;
3913 } else {
3914 return false; // keep looking
3915 }
3916 };
3917 assert_locked_or_safepoint(AdapterHandlerLibrary_lock);
3918 _adapter_handler_table->iterate(findblob_runtime_table);
3919 }
3920 assert(found, "Should have found handler");
3921 }
3922
3923 void AdapterHandlerEntry::print_adapter_on(outputStream* st) const {
3924 st->print("AHE@" INTPTR_FORMAT ": %s", p2i(this), fingerprint()->as_string());
3925 if (get_i2c_entry() != nullptr) {
3926 st->print(" i2c: " INTPTR_FORMAT, p2i(get_i2c_entry()));
3927 }
3928 if (get_c2i_entry() != nullptr) {
3929 st->print(" c2i: " INTPTR_FORMAT, p2i(get_c2i_entry()));
3930 }
3931 if (get_c2i_entry() != nullptr) {
3932 st->print(" c2iVE: " INTPTR_FORMAT, p2i(get_c2i_inline_entry()));
3933 }
3934 if (get_c2i_entry() != nullptr) {
3935 st->print(" c2iVROE: " INTPTR_FORMAT, p2i(get_c2i_inline_ro_entry()));
3936 }
3937 if (get_c2i_unverified_entry() != nullptr) {
3938 st->print(" c2iUE: " INTPTR_FORMAT, p2i(get_c2i_unverified_entry()));
3939 }
3940 if (get_c2i_unverified_entry() != nullptr) {
3941 st->print(" c2iUVE: " INTPTR_FORMAT, p2i(get_c2i_unverified_inline_entry()));
3942 }
3943 if (get_c2i_no_clinit_check_entry() != nullptr) {
3944 st->print(" c2iNCI: " INTPTR_FORMAT, p2i(get_c2i_no_clinit_check_entry()));
3945 }
3946 st->cr();
3947 }
3948
3949 #ifndef PRODUCT
3950
3951 void AdapterHandlerLibrary::print_statistics() {
3952 print_table_statistics();
3953 }
3954
3955 #endif /* PRODUCT */
3956
3957 bool AdapterHandlerLibrary::is_abstract_method_adapter(AdapterHandlerEntry* entry) {
3958 if (entry == _abstract_method_handler) {
3959 return true;
3960 }
3961 return false;
3962 }
3963
3964 JRT_LEAF(void, SharedRuntime::enable_stack_reserved_zone(JavaThread* current))
3965 assert(current == JavaThread::current(), "pre-condition");
3966 StackOverflow* overflow_state = current->stack_overflow_state();
3967 overflow_state->enable_stack_reserved_zone(/*check_if_disabled*/true);
3968 overflow_state->set_reserved_stack_activation(current->stack_base());
3969 JRT_END
3970
3971 frame SharedRuntime::look_for_reserved_stack_annotated_method(JavaThread* current, frame fr) {
3972 ResourceMark rm(current);
3973 frame activation;
3974 nmethod* nm = nullptr;
3975 int count = 1;
3976
3977 assert(fr.is_java_frame(), "Must start on Java frame");
3978
3979 RegisterMap map(JavaThread::current(),
3980 RegisterMap::UpdateMap::skip,
3981 RegisterMap::ProcessFrames::skip,
3982 RegisterMap::WalkContinuation::skip); // don't walk continuations
3983 for (; !fr.is_first_frame(); fr = fr.sender(&map)) {
3984 if (!fr.is_java_frame()) {
3985 continue;
3986 }
3987
3988 Method* method = nullptr;
3989 bool found = false;
3990 if (fr.is_interpreted_frame()) {
3991 method = fr.interpreter_frame_method();
3992 if (method != nullptr && method->has_reserved_stack_access()) {
3993 found = true;
3994 }
3995 } else {
3996 CodeBlob* cb = fr.cb();
3997 if (cb != nullptr && cb->is_nmethod()) {
3998 nm = cb->as_nmethod();
3999 method = nm->method();
4000 // scope_desc_near() must be used, instead of scope_desc_at() because on
4001 // SPARC, the pcDesc can be on the delay slot after the call instruction.
4002 for (ScopeDesc *sd = nm->scope_desc_near(fr.pc()); sd != nullptr; sd = sd->sender()) {
4003 method = sd->method();
4004 if (method != nullptr && method->has_reserved_stack_access()) {
4005 found = true;
4006 }
4007 }
4008 }
4009 }
4010 if (found) {
4011 activation = fr;
4012 warning("Potentially dangerous stack overflow in "
4013 "ReservedStackAccess annotated method %s [%d]",
4014 method->name_and_sig_as_C_string(), count++);
4015 EventReservedStackActivation event;
4016 if (event.should_commit()) {
4017 event.set_method(method);
4018 event.commit();
4019 }
4020 }
4021 }
4022 return activation;
4023 }
4024
4025 void SharedRuntime::on_slowpath_allocation_exit(JavaThread* current) {
4026 // After any safepoint, just before going back to compiled code,
4027 // we inform the GC that we will be doing initializing writes to
4028 // this object in the future without emitting card-marks, so
4029 // GC may take any compensating steps.
4030
4031 oop new_obj = current->vm_result_oop();
4032 if (new_obj == nullptr) return;
4033
4034 BarrierSet *bs = BarrierSet::barrier_set();
4035 bs->on_slowpath_allocation_exit(current, new_obj);
4036 }
4037
4038 // We are at a compiled code to interpreter call. We need backing
4039 // buffers for all inline type arguments. Allocate an object array to
4040 // hold them (convenient because once we're done with it we don't have
4041 // to worry about freeing it).
4042 oop SharedRuntime::allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS) {
4043 assert(InlineTypePassFieldsAsArgs, "no reason to call this");
4044 ResourceMark rm;
4045
4046 int nb_slots = 0;
4047 InstanceKlass* holder = callee->method_holder();
4048 allocate_receiver &= !callee->is_static() && holder->is_inline_klass() && callee->is_scalarized_arg(0);
4049 if (allocate_receiver) {
4050 nb_slots++;
4051 }
4052 int arg_num = callee->is_static() ? 0 : 1;
4053 for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
4054 BasicType bt = ss.type();
4055 if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
4056 nb_slots++;
4057 }
4058 if (bt != T_VOID) {
4059 arg_num++;
4060 }
4061 }
4062 objArrayOop array_oop = oopFactory::new_objectArray(nb_slots, CHECK_NULL);
4063 objArrayHandle array(THREAD, array_oop);
4064 arg_num = callee->is_static() ? 0 : 1;
4065 int i = 0;
4066 if (allocate_receiver) {
4067 InlineKlass* vk = InlineKlass::cast(holder);
4068 oop res = vk->allocate_instance(CHECK_NULL);
4069 array->obj_at_put(i++, res);
4070 }
4071 for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
4072 BasicType bt = ss.type();
4073 if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
4074 InlineKlass* vk = ss.as_inline_klass(holder);
4075 assert(vk != nullptr, "Unexpected klass");
4076 oop res = vk->allocate_instance(CHECK_NULL);
4077 array->obj_at_put(i++, res);
4078 }
4079 if (bt != T_VOID) {
4080 arg_num++;
4081 }
4082 }
4083 return array();
4084 }
4085
4086 JRT_ENTRY(void, SharedRuntime::allocate_inline_types(JavaThread* current, Method* callee_method, bool allocate_receiver))
4087 methodHandle callee(current, callee_method);
4088 oop array = SharedRuntime::allocate_inline_types_impl(current, callee, allocate_receiver, CHECK);
4089 current->set_vm_result_oop(array);
4090 current->set_vm_result_metadata(callee()); // TODO: required to keep callee live?
4091 JRT_END
4092
4093 // We're returning from an interpreted method: load each field into a
4094 // register following the calling convention
4095 JRT_LEAF(void, SharedRuntime::load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res))
4096 {
4097 assert(res->klass()->is_inline_klass(), "only inline types here");
4098 ResourceMark rm;
4099 RegisterMap reg_map(current,
4100 RegisterMap::UpdateMap::include,
4101 RegisterMap::ProcessFrames::include,
4102 RegisterMap::WalkContinuation::skip);
4103 frame stubFrame = current->last_frame();
4104 frame callerFrame = stubFrame.sender(®_map);
4105 assert(callerFrame.is_interpreted_frame(), "should be coming from interpreter");
4106
4107 InlineKlass* vk = InlineKlass::cast(res->klass());
4108
4109 const Array<SigEntry>* sig_vk = vk->extended_sig();
4110 const Array<VMRegPair>* regs = vk->return_regs();
4111
4112 if (regs == nullptr) {
4113 // The fields of the inline klass don't fit in registers, bail out
4114 return;
4115 }
4116
4117 int j = 1;
4118 for (int i = 0; i < sig_vk->length(); i++) {
4119 BasicType bt = sig_vk->at(i)._bt;
4120 if (bt == T_METADATA) {
4121 continue;
4122 }
4123 if (bt == T_VOID) {
4124 if (sig_vk->at(i-1)._bt == T_LONG ||
4125 sig_vk->at(i-1)._bt == T_DOUBLE) {
4126 j++;
4127 }
4128 continue;
4129 }
4130 int off = sig_vk->at(i)._offset;
4131 assert(off > 0, "offset in object should be positive");
4132 VMRegPair pair = regs->at(j);
4133 address loc = reg_map.location(pair.first(), nullptr);
4134 switch(bt) {
4135 case T_BOOLEAN:
4136 *(jboolean*)loc = res->bool_field(off);
4137 break;
4138 case T_CHAR:
4139 *(jchar*)loc = res->char_field(off);
4140 break;
4141 case T_BYTE:
4142 *(jbyte*)loc = res->byte_field(off);
4143 break;
4144 case T_SHORT:
4145 *(jshort*)loc = res->short_field(off);
4146 break;
4147 case T_INT: {
4148 *(jint*)loc = res->int_field(off);
4149 break;
4150 }
4151 case T_LONG:
4152 #ifdef _LP64
4153 *(intptr_t*)loc = res->long_field(off);
4154 #else
4155 Unimplemented();
4156 #endif
4157 break;
4158 case T_OBJECT:
4159 case T_ARRAY: {
4160 *(oop*)loc = res->obj_field(off);
4161 break;
4162 }
4163 case T_FLOAT:
4164 *(jfloat*)loc = res->float_field(off);
4165 break;
4166 case T_DOUBLE:
4167 *(jdouble*)loc = res->double_field(off);
4168 break;
4169 default:
4170 ShouldNotReachHere();
4171 }
4172 j++;
4173 }
4174 assert(j == regs->length(), "missed a field?");
4175
4176 #ifdef ASSERT
4177 VMRegPair pair = regs->at(0);
4178 address loc = reg_map.location(pair.first(), nullptr);
4179 assert(*(oopDesc**)loc == res, "overwritten object");
4180 #endif
4181
4182 current->set_vm_result_oop(res);
4183 }
4184 JRT_END
4185
4186 // We've returned to an interpreted method, the interpreter needs a
4187 // reference to an inline type instance. Allocate it and initialize it
4188 // from field's values in registers.
4189 JRT_BLOCK_ENTRY(void, SharedRuntime::store_inline_type_fields_to_buf(JavaThread* current, intptr_t res))
4190 {
4191 ResourceMark rm;
4192 RegisterMap reg_map(current,
4193 RegisterMap::UpdateMap::include,
4194 RegisterMap::ProcessFrames::include,
4195 RegisterMap::WalkContinuation::skip);
4196 frame stubFrame = current->last_frame();
4197 frame callerFrame = stubFrame.sender(®_map);
4198
4199 #ifdef ASSERT
4200 InlineKlass* verif_vk = InlineKlass::returned_inline_klass(reg_map);
4201 #endif
4202
4203 if (!is_set_nth_bit(res, 0)) {
4204 // We're not returning with inline type fields in registers (the
4205 // calling convention didn't allow it for this inline klass)
4206 assert(!Metaspace::contains((void*)res), "should be oop or pointer in buffer area");
4207 current->set_vm_result_oop((oopDesc*)res);
4208 assert(verif_vk == nullptr, "broken calling convention");
4209 return;
4210 }
4211
4212 clear_nth_bit(res, 0);
4213 InlineKlass* vk = (InlineKlass*)res;
4214 assert(verif_vk == vk, "broken calling convention");
4215 assert(Metaspace::contains((void*)res), "should be klass");
4216
4217 // Allocate handles for every oop field so they are safe in case of
4218 // a safepoint when allocating
4219 GrowableArray<Handle> handles;
4220 vk->save_oop_fields(reg_map, handles);
4221
4222 // It's unsafe to safepoint until we are here
4223 JRT_BLOCK;
4224 {
4225 JavaThread* THREAD = current;
4226 oop vt = vk->realloc_result(reg_map, handles, CHECK);
4227 current->set_vm_result_oop(vt);
4228 }
4229 JRT_BLOCK_END;
4230 }
4231 JRT_END