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