1 /*
2 * Copyright (c) 2012, 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 #include "classfile/javaClasses.inline.hpp"
25 #include "classfile/symbolTable.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmClasses.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "gc/shared/collectedHeap.hpp"
30 #include "gc/shared/memAllocator.hpp"
31 #include "gc/shared/oopStorage.inline.hpp"
32 #include "jvmci/jniAccessMark.inline.hpp"
33 #include "jvmci/jvmciCodeInstaller.hpp"
34 #include "jvmci/jvmciCompilerToVM.hpp"
35 #include "jvmci/jvmciRuntime.hpp"
36 #include "jvmci/metadataHandles.hpp"
37 #include "logging/log.hpp"
38 #include "logging/logStream.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/universe.hpp"
41 #include "oops/constantPool.inline.hpp"
42 #include "oops/klass.inline.hpp"
43 #include "oops/method.inline.hpp"
44 #include "oops/objArrayKlass.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "oops/typeArrayOop.inline.hpp"
47 #include "prims/jvmtiExport.hpp"
48 #include "prims/methodHandles.hpp"
49 #include "runtime/arguments.hpp"
50 #include "runtime/atomic.hpp"
51 #include "runtime/deoptimization.hpp"
52 #include "runtime/fieldDescriptor.inline.hpp"
53 #include "runtime/frame.inline.hpp"
54 #include "runtime/java.hpp"
55 #include "runtime/jniHandles.inline.hpp"
56 #include "runtime/mutex.hpp"
57 #include "runtime/reflection.hpp"
58 #include "runtime/sharedRuntime.hpp"
59 #include "runtime/synchronizer.hpp"
60 #if INCLUDE_G1GC
61 #include "gc/g1/g1BarrierSetRuntime.hpp"
62 #endif // INCLUDE_G1GC
63
64 // Simple helper to see if the caller of a runtime stub which
65 // entered the VM has been deoptimized
66
67 static bool caller_is_deopted() {
68 JavaThread* thread = JavaThread::current();
69 RegisterMap reg_map(thread,
70 RegisterMap::UpdateMap::skip,
71 RegisterMap::ProcessFrames::include,
72 RegisterMap::WalkContinuation::skip);
73 frame runtime_frame = thread->last_frame();
74 frame caller_frame = runtime_frame.sender(®_map);
75 assert(caller_frame.is_compiled_frame(), "must be compiled");
76 return caller_frame.is_deoptimized_frame();
77 }
78
79 // Stress deoptimization
80 static void deopt_caller() {
81 if ( !caller_is_deopted()) {
82 JavaThread* thread = JavaThread::current();
83 RegisterMap reg_map(thread,
84 RegisterMap::UpdateMap::skip,
85 RegisterMap::ProcessFrames::include,
86 RegisterMap::WalkContinuation::skip);
87 frame runtime_frame = thread->last_frame();
88 frame caller_frame = runtime_frame.sender(®_map);
89 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
90 assert(caller_is_deopted(), "Must be deoptimized");
91 }
92 }
93
94 // Manages a scope for a JVMCI runtime call that attempts a heap allocation.
95 // If there is a pending OutOfMemoryError upon closing the scope and the runtime
96 // call is of the variety where allocation failure returns null without an
97 // exception, the following action is taken:
98 // 1. The pending OutOfMemoryError is cleared
99 // 2. null is written to JavaThread::_vm_result_oop
100 class RetryableAllocationMark {
101 private:
102 InternalOOMEMark _iom;
103 public:
104 RetryableAllocationMark(JavaThread* thread) : _iom(thread) {}
105 ~RetryableAllocationMark() {
106 JavaThread* THREAD = _iom.thread(); // For exception macros.
107 if (THREAD != nullptr) {
108 if (HAS_PENDING_EXCEPTION) {
109 oop ex = PENDING_EXCEPTION;
110 THREAD->set_vm_result_oop(nullptr);
111 if (ex->is_a(vmClasses::OutOfMemoryError_klass())) {
112 CLEAR_PENDING_EXCEPTION;
113 }
114 }
115 }
116 }
117 };
118
119 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance_or_null(JavaThread* current, Klass* klass))
120 JRT_BLOCK;
121 assert(klass->is_klass(), "not a class");
122 Handle holder(current, klass->klass_holder()); // keep the klass alive
123 InstanceKlass* h = InstanceKlass::cast(klass);
124 {
125 RetryableAllocationMark ram(current);
126 h->check_valid_for_instantiation(true, CHECK);
127 if (!h->is_initialized()) {
128 // Cannot re-execute class initialization without side effects
129 // so return without attempting the initialization
130 current->set_vm_result_oop(nullptr);
131 return;
132 }
133 // allocate instance and return via TLS
134 oop obj = h->allocate_instance(CHECK);
135 current->set_vm_result_oop(obj);
136 }
137 JRT_BLOCK_END;
138 SharedRuntime::on_slowpath_allocation_exit(current);
139 JRT_END
140
141 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array_or_null(JavaThread* current, Klass* array_klass, jint length))
142 JRT_BLOCK;
143 // Note: no handle for klass needed since they are not used
144 // anymore after new_objArray() and no GC can happen before.
145 // (This may have to change if this code changes!)
146 assert(array_klass->is_klass(), "not a class");
147 oop obj;
148 if (array_klass->is_typeArray_klass()) {
149 BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
150 RetryableAllocationMark ram(current);
151 obj = oopFactory::new_typeArray(elt_type, length, CHECK);
152 } else {
153 Handle holder(current, array_klass->klass_holder()); // keep the klass alive
154 Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
155 RetryableAllocationMark ram(current);
156 obj = oopFactory::new_objArray(elem_klass, length, CHECK);
157 }
158 // This is pretty rare but this runtime patch is stressful to deoptimization
159 // if we deoptimize here so force a deopt to stress the path.
160 if (DeoptimizeALot) {
161 static int deopts = 0;
162 if (deopts++ % 2 == 0) {
163 // Drop the allocation
164 obj = nullptr;
165 } else {
166 deopt_caller();
167 }
168 }
169 current->set_vm_result_oop(obj);
170 JRT_BLOCK_END;
171 SharedRuntime::on_slowpath_allocation_exit(current);
172 JRT_END
173
174 JRT_ENTRY(void, JVMCIRuntime::new_multi_array_or_null(JavaThread* current, Klass* klass, int rank, jint* dims))
175 assert(klass->is_klass(), "not a class");
176 assert(rank >= 1, "rank must be nonzero");
177 Handle holder(current, klass->klass_holder()); // keep the klass alive
178 RetryableAllocationMark ram(current);
179 oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
180 current->set_vm_result_oop(obj);
181 JRT_END
182
183 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array_or_null(JavaThread* current, oopDesc* element_mirror, jint length))
184 RetryableAllocationMark ram(current);
185 oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
186 current->set_vm_result_oop(obj);
187 JRT_END
188
189 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance_or_null(JavaThread* current, oopDesc* type_mirror))
190 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(type_mirror));
191
192 if (klass == nullptr) {
193 ResourceMark rm(current);
194 THROW(vmSymbols::java_lang_InstantiationException());
195 }
196 RetryableAllocationMark ram(current);
197
198 // Create new instance (the receiver)
199 klass->check_valid_for_instantiation(false, CHECK);
200
201 if (!klass->is_initialized()) {
202 // Cannot re-execute class initialization without side effects
203 // so return without attempting the initialization
204 current->set_vm_result_oop(nullptr);
205 return;
206 }
207
208 oop obj = klass->allocate_instance(CHECK);
209 current->set_vm_result_oop(obj);
210 JRT_END
211
212 extern void vm_exit(int code);
213
214 // Enter this method from compiled code handler below. This is where we transition
215 // to VM mode. This is done as a helper routine so that the method called directly
216 // from compiled code does not have to transition to VM. This allows the entry
217 // method to see if the nmethod that we have just looked up a handler for has
218 // been deoptimized while we were in the vm. This simplifies the assembly code
219 // cpu directories.
220 //
221 // We are entering here from exception stub (via the entry method below)
222 // If there is a compiled exception handler in this method, we will continue there;
223 // otherwise we will unwind the stack and continue at the caller of top frame method
224 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
225 // control the area where we can allow a safepoint. After we exit the safepoint area we can
226 // check to see if the handler we are going to return is now in a nmethod that has
227 // been deoptimized. If that is the case we return the deopt blob
228 // unpack_with_exception entry instead. This makes life for the exception blob easier
229 // because making that same check and diverting is painful from assembly language.
230 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* current, oopDesc* ex, address pc, nmethod*& nm))
231 // Reset method handle flag.
232 current->set_is_method_handle_return(false);
233
234 Handle exception(current, ex);
235
236 // The frame we rethrow the exception to might not have been processed by the GC yet.
237 // The stack watermark barrier takes care of detecting that and ensuring the frame
238 // has updated oops.
239 StackWatermarkSet::after_unwind(current);
240
241 nm = CodeCache::find_nmethod(pc);
242 assert(nm != nullptr, "did not find nmethod");
243 // Adjust the pc as needed/
244 if (nm->is_deopt_pc(pc)) {
245 RegisterMap map(current,
246 RegisterMap::UpdateMap::skip,
247 RegisterMap::ProcessFrames::include,
248 RegisterMap::WalkContinuation::skip);
249 frame exception_frame = current->last_frame().sender(&map);
250 // if the frame isn't deopted then pc must not correspond to the caller of last_frame
251 assert(exception_frame.is_deoptimized_frame(), "must be deopted");
252 pc = exception_frame.pc();
253 }
254 assert(exception.not_null(), "null exceptions should be handled by throw_exception");
255 assert(oopDesc::is_oop(exception()), "just checking");
256 // Check that exception is a subclass of Throwable
257 assert(exception->is_a(vmClasses::Throwable_klass()),
258 "Exception not subclass of Throwable");
259
260 // debugging support
261 // tracing
262 if (log_is_enabled(Info, exceptions)) {
263 ResourceMark rm;
264 stringStream tempst;
265 assert(nm->method() != nullptr, "Unexpected null method()");
266 tempst.print("JVMCI compiled method <%s>\n"
267 " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT,
268 nm->method()->print_value_string(), p2i(pc), p2i(current));
269 Exceptions::log_exception(exception, tempst.as_string());
270 }
271 // for AbortVMOnException flag
272 Exceptions::debug_check_abort(exception);
273
274 // Check the stack guard pages and re-enable them if necessary and there is
275 // enough space on the stack to do so. Use fast exceptions only if the guard
276 // pages are enabled.
277 bool guard_pages_enabled = current->stack_overflow_state()->reguard_stack_if_needed();
278
279 if (JvmtiExport::can_post_on_exceptions()) {
280 // To ensure correct notification of exception catches and throws
281 // we have to deoptimize here. If we attempted to notify the
282 // catches and throws during this exception lookup it's possible
283 // we could deoptimize on the way out of the VM and end back in
284 // the interpreter at the throw site. This would result in double
285 // notifications since the interpreter would also notify about
286 // these same catches and throws as it unwound the frame.
287
288 RegisterMap reg_map(current,
289 RegisterMap::UpdateMap::include,
290 RegisterMap::ProcessFrames::include,
291 RegisterMap::WalkContinuation::skip);
292 frame stub_frame = current->last_frame();
293 frame caller_frame = stub_frame.sender(®_map);
294
295 // We don't really want to deoptimize the nmethod itself since we
296 // can actually continue in the exception handler ourselves but I
297 // don't see an easy way to have the desired effect.
298 Deoptimization::deoptimize_frame(current, caller_frame.id(), Deoptimization::Reason_constraint);
299 assert(caller_is_deopted(), "Must be deoptimized");
300
301 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
302 }
303
304 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
305 if (guard_pages_enabled) {
306 address fast_continuation = nm->handler_for_exception_and_pc(exception, pc);
307 if (fast_continuation != nullptr) {
308 // Set flag if return address is a method handle call site.
309 current->set_is_method_handle_return(nm->is_method_handle_return(pc));
310 return fast_continuation;
311 }
312 }
313
314 // If the stack guard pages are enabled, check whether there is a handler in
315 // the current method. Otherwise (guard pages disabled), force an unwind and
316 // skip the exception cache update (i.e., just leave continuation==nullptr).
317 address continuation = nullptr;
318 if (guard_pages_enabled) {
319
320 // New exception handling mechanism can support inlined methods
321 // with exception handlers since the mappings are from PC to PC
322
323 // Clear out the exception oop and pc since looking up an
324 // exception handler can cause class loading, which might throw an
325 // exception and those fields are expected to be clear during
326 // normal bytecode execution.
327 current->clear_exception_oop_and_pc();
328
329 bool recursive_exception = false;
330 continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false, recursive_exception);
331 // If an exception was thrown during exception dispatch, the exception oop may have changed
332 current->set_exception_oop(exception());
333 current->set_exception_pc(pc);
334
335 // The exception cache is used only for non-implicit exceptions
336 // Update the exception cache only when another exception did
337 // occur during the computation of the compiled exception handler
338 // (e.g., when loading the class of the catch type).
339 // Checking for exception oop equality is not
340 // sufficient because some exceptions are pre-allocated and reused.
341 if (continuation != nullptr && !recursive_exception && !SharedRuntime::deopt_blob()->contains(continuation)) {
342 nm->add_handler_for_exception_and_pc(exception, pc, continuation);
343 }
344 }
345
346 // Set flag if return address is a method handle call site.
347 current->set_is_method_handle_return(nm->is_method_handle_return(pc));
348
349 if (log_is_enabled(Info, exceptions)) {
350 ResourceMark rm;
351 log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
352 " for exception thrown at PC " PTR_FORMAT,
353 p2i(current), p2i(continuation), p2i(pc));
354 }
355
356 return continuation;
357 JRT_END
358
359 // Enter this method from compiled code only if there is a Java exception handler
360 // in the method handling the exception.
361 // We are entering here from exception stub. We don't do a normal VM transition here.
362 // We do it in a helper. This is so we can check to see if the nmethod we have just
363 // searched for an exception handler has been deoptimized in the meantime.
364 address JVMCIRuntime::exception_handler_for_pc(JavaThread* current) {
365 oop exception = current->exception_oop();
366 address pc = current->exception_pc();
367 // Still in Java mode
368 DEBUG_ONLY(NoHandleMark nhm);
369 nmethod* nm = nullptr;
370 address continuation = nullptr;
371 {
372 // Enter VM mode by calling the helper
373 ResetNoHandleMark rnhm;
374 continuation = exception_handler_for_pc_helper(current, exception, pc, nm);
375 }
376 // Back in JAVA, use no oops DON'T safepoint
377
378 // Now check to see if the compiled method we were called from is now deoptimized.
379 // If so we must return to the deopt blob and deoptimize the nmethod
380 if (nm != nullptr && caller_is_deopted()) {
381 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
382 }
383
384 assert(continuation != nullptr, "no handler found");
385 return continuation;
386 }
387
388 JRT_BLOCK_ENTRY(void, JVMCIRuntime::monitorenter(JavaThread* current, oopDesc* obj, BasicLock* lock))
389 SharedRuntime::monitor_enter_helper(obj, lock, current);
390 JRT_END
391
392 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* current, oopDesc* obj, BasicLock* lock))
393 assert(current == JavaThread::current(), "pre-condition");
394 assert(current->last_Java_sp(), "last_Java_sp must be set");
395 assert(oopDesc::is_oop(obj), "invalid lock object pointer dected");
396 SharedRuntime::monitor_exit_helper(obj, lock, current);
397 JRT_END
398
399 // Object.notify() fast path, caller does slow path
400 JRT_LEAF(jboolean, JVMCIRuntime::object_notify(JavaThread* current, oopDesc* obj))
401 assert(current == JavaThread::current(), "pre-condition");
402
403 // Very few notify/notifyAll operations find any threads on the waitset, so
404 // the dominant fast-path is to simply return.
405 // Relatedly, it's critical that notify/notifyAll be fast in order to
406 // reduce lock hold times.
407 if (!SafepointSynchronize::is_synchronizing()) {
408 if (ObjectSynchronizer::quick_notify(obj, current, false)) {
409 return true;
410 }
411 }
412 return false; // caller must perform slow path
413
414 JRT_END
415
416 // Object.notifyAll() fast path, caller does slow path
417 JRT_LEAF(jboolean, JVMCIRuntime::object_notifyAll(JavaThread* current, oopDesc* obj))
418 assert(current == JavaThread::current(), "pre-condition");
419
420 if (!SafepointSynchronize::is_synchronizing() ) {
421 if (ObjectSynchronizer::quick_notify(obj, current, true)) {
422 return true;
423 }
424 }
425 return false; // caller must perform slow path
426
427 JRT_END
428
429 JRT_BLOCK_ENTRY(int, JVMCIRuntime::throw_and_post_jvmti_exception(JavaThread* current, const char* exception, const char* message))
430 JRT_BLOCK;
431 TempNewSymbol symbol = SymbolTable::new_symbol(exception);
432 SharedRuntime::throw_and_post_jvmti_exception(current, symbol, message);
433 JRT_BLOCK_END;
434 return caller_is_deopted();
435 JRT_END
436
437 JRT_BLOCK_ENTRY(int, JVMCIRuntime::throw_klass_external_name_exception(JavaThread* current, const char* exception, Klass* klass))
438 JRT_BLOCK;
439 ResourceMark rm(current);
440 TempNewSymbol symbol = SymbolTable::new_symbol(exception);
441 SharedRuntime::throw_and_post_jvmti_exception(current, symbol, klass->external_name());
442 JRT_BLOCK_END;
443 return caller_is_deopted();
444 JRT_END
445
446 JRT_BLOCK_ENTRY(int, JVMCIRuntime::throw_class_cast_exception(JavaThread* current, const char* exception, Klass* caster_klass, Klass* target_klass))
447 JRT_BLOCK;
448 ResourceMark rm(current);
449 const char* message = SharedRuntime::generate_class_cast_message(caster_klass, target_klass);
450 TempNewSymbol symbol = SymbolTable::new_symbol(exception);
451 SharedRuntime::throw_and_post_jvmti_exception(current, symbol, message);
452 JRT_BLOCK_END;
453 return caller_is_deopted();
454 JRT_END
455
456 class ArgumentPusher : public SignatureIterator {
457 protected:
458 JavaCallArguments* _jca;
459 jlong _argument;
460 bool _pushed;
461
462 jlong next_arg() {
463 guarantee(!_pushed, "one argument");
464 _pushed = true;
465 return _argument;
466 }
467
468 float next_float() {
469 guarantee(!_pushed, "one argument");
470 _pushed = true;
471 jvalue v;
472 v.i = (jint) _argument;
473 return v.f;
474 }
475
476 double next_double() {
477 guarantee(!_pushed, "one argument");
478 _pushed = true;
479 jvalue v;
480 v.j = _argument;
481 return v.d;
482 }
483
484 Handle next_object() {
485 guarantee(!_pushed, "one argument");
486 _pushed = true;
487 return Handle(Thread::current(), cast_to_oop(_argument));
488 }
489
490 public:
491 ArgumentPusher(Symbol* signature, JavaCallArguments* jca, jlong argument) : SignatureIterator(signature) {
492 this->_return_type = T_ILLEGAL;
493 _jca = jca;
494 _argument = argument;
495 _pushed = false;
496 do_parameters_on(this);
497 }
498
499 void do_type(BasicType type) {
500 switch (type) {
501 case T_OBJECT:
502 case T_ARRAY: _jca->push_oop(next_object()); break;
503 case T_BOOLEAN: _jca->push_int((jboolean) next_arg()); break;
504 case T_CHAR: _jca->push_int((jchar) next_arg()); break;
505 case T_SHORT: _jca->push_int((jint) next_arg()); break;
506 case T_BYTE: _jca->push_int((jbyte) next_arg()); break;
507 case T_INT: _jca->push_int((jint) next_arg()); break;
508 case T_LONG: _jca->push_long((jlong) next_arg()); break;
509 case T_FLOAT: _jca->push_float(next_float()); break;
510 case T_DOUBLE: _jca->push_double(next_double()); break;
511 default: fatal("Unexpected type %s", type2name(type));
512 }
513 }
514 };
515
516
517 JRT_ENTRY(jlong, JVMCIRuntime::invoke_static_method_one_arg(JavaThread* current, Method* method, jlong argument))
518 ResourceMark rm;
519 HandleMark hm(current);
520
521 methodHandle mh(current, method);
522 if (mh->size_of_parameters() > 1 && !mh->is_static()) {
523 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Invoked method must be static and take at most one argument");
524 }
525
526 Symbol* signature = mh->signature();
527 JavaCallArguments jca(mh->size_of_parameters());
528 ArgumentPusher jap(signature, &jca, argument);
529 BasicType return_type = jap.return_type();
530 JavaValue result(return_type);
531 JavaCalls::call(&result, mh, &jca, CHECK_0);
532
533 if (return_type == T_VOID) {
534 return 0;
535 } else if (return_type == T_OBJECT || return_type == T_ARRAY) {
536 current->set_vm_result_oop(result.get_oop());
537 return 0;
538 } else {
539 jvalue *value = (jvalue *) result.get_value_addr();
540 // Narrow the value down if required (Important on big endian machines)
541 switch (return_type) {
542 case T_BOOLEAN:
543 return (jboolean) value->i;
544 case T_BYTE:
545 return (jbyte) value->i;
546 case T_CHAR:
547 return (jchar) value->i;
548 case T_SHORT:
549 return (jshort) value->i;
550 case T_INT:
551 case T_FLOAT:
552 return value->i;
553 case T_LONG:
554 case T_DOUBLE:
555 return value->j;
556 default:
557 fatal("Unexpected type %s", type2name(return_type));
558 return 0;
559 }
560 }
561 JRT_END
562
563 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
564 ttyLocker ttyl;
565
566 if (obj == nullptr) {
567 tty->print("null");
568 } else if (oopDesc::is_oop_or_null(obj, true) && (!as_string || !java_lang_String::is_instance(obj))) {
569 if (oopDesc::is_oop_or_null(obj, true)) {
570 char buf[O_BUFLEN];
571 tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
572 } else {
573 tty->print(INTPTR_FORMAT, p2i(obj));
574 }
575 } else {
576 ResourceMark rm;
577 assert(obj != nullptr && java_lang_String::is_instance(obj), "must be");
578 char *buf = java_lang_String::as_utf8_string(obj);
579 tty->print_raw(buf);
580 }
581 if (newline) {
582 tty->cr();
583 }
584 JRT_END
585
586 #if INCLUDE_G1GC
587
588 void JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj) {
589 G1BarrierSetRuntime::write_ref_field_pre_entry(obj, thread);
590 }
591
592 void JVMCIRuntime::write_barrier_post(JavaThread* thread, volatile CardValue* card_addr) {
593 G1BarrierSetRuntime::write_ref_field_post_entry(card_addr, thread);
594 }
595
596 #endif // INCLUDE_G1GC
597
598 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
599 bool ret = true;
600 if(!Universe::heap()->is_in(parent)) {
601 tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
602 parent->print();
603 ret=false;
604 }
605 if(!Universe::heap()->is_in(child)) {
606 tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
607 child->print();
608 ret=false;
609 }
610 return (jint)ret;
611 JRT_END
612
613 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* current, jlong where, jlong format, jlong value))
614 ResourceMark rm(current);
615 const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
616 char *detail_msg = nullptr;
617 if (format != 0L) {
618 const char* buf = (char*) (address) format;
619 size_t detail_msg_length = strlen(buf) * 2;
620 detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
621 jio_snprintf(detail_msg, detail_msg_length, buf, value);
622 }
623 report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
624 JRT_END
625
626 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
627 oop exception = thread->exception_oop();
628 assert(exception != nullptr, "npe");
629 thread->set_exception_oop(nullptr);
630 thread->set_exception_pc(nullptr);
631 return exception;
632 JRT_END
633
634 PRAGMA_DIAG_PUSH
635 PRAGMA_FORMAT_NONLITERAL_IGNORED
636 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, const char* format, jlong v1, jlong v2, jlong v3))
637 ResourceMark rm;
638 tty->print(format, v1, v2, v3);
639 JRT_END
640 PRAGMA_DIAG_POP
641
642 static void decipher(jlong v, bool ignoreZero) {
643 if (v != 0 || !ignoreZero) {
644 void* p = (void *)(address) v;
645 CodeBlob* cb = CodeCache::find_blob(p);
646 if (cb) {
647 if (cb->is_nmethod()) {
648 char buf[O_BUFLEN];
649 tty->print("%s [" INTPTR_FORMAT "+" JLONG_FORMAT "]", cb->as_nmethod()->method()->name_and_sig_as_C_string(buf, O_BUFLEN), p2i(cb->code_begin()), (jlong)((address)v - cb->code_begin()));
650 return;
651 }
652 cb->print_value_on(tty);
653 return;
654 }
655 if (Universe::heap()->is_in(p)) {
656 oop obj = cast_to_oop(p);
657 obj->print_value_on(tty);
658 return;
659 }
660 tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
661 }
662 }
663
664 PRAGMA_DIAG_PUSH
665 PRAGMA_FORMAT_NONLITERAL_IGNORED
666 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
667 ResourceMark rm;
668 const char *buf = (const char*) (address) format;
669 if (vmError) {
670 if (buf != nullptr) {
671 fatal(buf, v1, v2, v3);
672 } else {
673 fatal("<anonymous error>");
674 }
675 } else if (buf != nullptr) {
676 tty->print(buf, v1, v2, v3);
677 } else {
678 assert(v2 == 0, "v2 != 0");
679 assert(v3 == 0, "v3 != 0");
680 decipher(v1, false);
681 }
682 JRT_END
683 PRAGMA_DIAG_POP
684
685 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
686 union {
687 jlong l;
688 jdouble d;
689 jfloat f;
690 } uu;
691 uu.l = value;
692 switch (typeChar) {
693 case 'Z': tty->print(value == 0 ? "false" : "true"); break;
694 case 'B': tty->print("%d", (jbyte) value); break;
695 case 'C': tty->print("%c", (jchar) value); break;
696 case 'S': tty->print("%d", (jshort) value); break;
697 case 'I': tty->print("%d", (jint) value); break;
698 case 'F': tty->print("%f", uu.f); break;
699 case 'J': tty->print(JLONG_FORMAT, value); break;
700 case 'D': tty->print("%lf", uu.d); break;
701 default: assert(false, "unknown typeChar"); break;
702 }
703 if (newline) {
704 tty->cr();
705 }
706 JRT_END
707
708 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* current, oopDesc* obj))
709 return (jint) obj->identity_hash();
710 JRT_END
711
712 JRT_ENTRY(jint, JVMCIRuntime::test_deoptimize_call_int(JavaThread* current, int value))
713 deopt_caller();
714 return (jint) value;
715 JRT_END
716
717
718 // Implementation of JVMCI.initializeRuntime()
719 // When called from libjvmci, `libjvmciOrHotspotEnv` is a libjvmci env so use JVM_ENTRY_NO_ENV.
720 JVM_ENTRY_NO_ENV(jobject, JVM_GetJVMCIRuntime(JNIEnv *libjvmciOrHotspotEnv, jclass c))
721 JVMCIENV_FROM_JNI(thread, libjvmciOrHotspotEnv);
722 if (!EnableJVMCI) {
723 JVMCI_THROW_MSG_NULL(InternalError, JVMCI_NOT_ENABLED_ERROR_MESSAGE);
724 }
725 JVMCIENV->runtime()->initialize_HotSpotJVMCIRuntime(JVMCI_CHECK_NULL);
726 JVMCIObject runtime = JVMCIENV->runtime()->get_HotSpotJVMCIRuntime(JVMCI_CHECK_NULL);
727 return JVMCIENV->get_jobject(runtime);
728 JVM_END
729
730 // Implementation of Services.readSystemPropertiesInfo(int[] offsets)
731 // When called from libjvmci, `env` is a libjvmci env so use JVM_ENTRY_NO_ENV.
732 JVM_ENTRY_NO_ENV(jlong, JVM_ReadSystemPropertiesInfo(JNIEnv *env, jclass c, jintArray offsets_handle))
733 JVMCIENV_FROM_JNI(thread, env);
734 if (!EnableJVMCI) {
735 JVMCI_THROW_MSG_0(InternalError, JVMCI_NOT_ENABLED_ERROR_MESSAGE);
736 }
737 JVMCIPrimitiveArray offsets = JVMCIENV->wrap(offsets_handle);
738 JVMCIENV->put_int_at(offsets, 0, SystemProperty::next_offset_in_bytes());
739 JVMCIENV->put_int_at(offsets, 1, SystemProperty::key_offset_in_bytes());
740 JVMCIENV->put_int_at(offsets, 2, PathString::value_offset_in_bytes());
741
742 return (jlong) Arguments::system_properties();
743 JVM_END
744
745
746 void JVMCINMethodData::initialize(int nmethod_mirror_index,
747 int nmethod_entry_patch_offset,
748 const char* nmethod_mirror_name,
749 bool is_default,
750 bool profile_deopt,
751 FailedSpeculation** failed_speculations)
752 {
753 _failed_speculations = failed_speculations;
754 _nmethod_mirror_index = nmethod_mirror_index;
755 guarantee(nmethod_entry_patch_offset != -1, "missing entry barrier");
756 _nmethod_entry_patch_offset = nmethod_entry_patch_offset;
757 if (nmethod_mirror_name != nullptr) {
758 _properties.bits._has_name = 1;
759 char* dest = (char*) name();
760 strcpy(dest, nmethod_mirror_name);
761 } else {
762 _properties.bits._has_name = 0;
763 }
764 _properties.bits._is_default = is_default;
765 _properties.bits._profile_deopt = profile_deopt;
766 }
767
768 void JVMCINMethodData::copy(JVMCINMethodData* data) {
769 initialize(data->_nmethod_mirror_index, data->_nmethod_entry_patch_offset, data->name(), data->_properties.bits._is_default,
770 data->_properties.bits._profile_deopt, data->_failed_speculations);
771 }
772
773 void JVMCINMethodData::add_failed_speculation(nmethod* nm, jlong speculation) {
774 jlong index = speculation >> JVMCINMethodData::SPECULATION_LENGTH_BITS;
775 guarantee(index >= 0 && index <= max_jint, "Encoded JVMCI speculation index is not a positive Java int: " INTPTR_FORMAT, index);
776 int length = speculation & JVMCINMethodData::SPECULATION_LENGTH_MASK;
777 if (index + length > (uint) nm->speculations_size()) {
778 fatal(INTPTR_FORMAT "[index: " JLONG_FORMAT ", length: %d out of bounds wrt encoded speculations of length %u", speculation, index, length, nm->speculations_size());
779 }
780 address data = nm->speculations_begin() + index;
781 FailedSpeculation::add_failed_speculation(nm, _failed_speculations, data, length);
782 }
783
784 oop JVMCINMethodData::get_nmethod_mirror(nmethod* nm) {
785 if (_nmethod_mirror_index == -1) {
786 return nullptr;
787 }
788 return nm->oop_at(_nmethod_mirror_index);
789 }
790
791 void JVMCINMethodData::set_nmethod_mirror(nmethod* nm, oop new_mirror) {
792 guarantee(_nmethod_mirror_index != -1, "cannot set JVMCI mirror for nmethod");
793 oop* addr = nm->oop_addr_at(_nmethod_mirror_index);
794 guarantee(new_mirror != nullptr, "use clear_nmethod_mirror to clear the mirror");
795 guarantee(*addr == nullptr, "cannot overwrite non-null mirror");
796
797 *addr = new_mirror;
798
799 // Since we've patched some oops in the nmethod,
800 // (re)register it with the heap.
801 MutexLocker ml(CodeCache_lock, Mutex::_no_safepoint_check_flag);
802 Universe::heap()->register_nmethod(nm);
803 }
804
805 void JVMCINMethodData::invalidate_nmethod_mirror(nmethod* nm, nmethod::InvalidationReason invalidation_reason) {
806 oop nmethod_mirror = get_nmethod_mirror(nm);
807 if (nmethod_mirror == nullptr) {
808 return;
809 }
810
811 // Update the values in the mirror if it still refers to nm.
812 // We cannot use JVMCIObject to wrap the mirror as this is called
813 // during GC, forbidding the creation of JNIHandles.
814 JVMCIEnv* jvmciEnv = nullptr;
815 nmethod* current = (nmethod*) HotSpotJVMCI::InstalledCode::address(jvmciEnv, nmethod_mirror);
816 if (nm == current) {
817 if (nm->is_unloading()) {
818 // Break the link from the mirror to nm such that
819 // future invocations via the mirror will result in
820 // an InvalidInstalledCodeException.
821 HotSpotJVMCI::InstalledCode::set_address(jvmciEnv, nmethod_mirror, 0);
822 HotSpotJVMCI::InstalledCode::set_entryPoint(jvmciEnv, nmethod_mirror, 0);
823 HotSpotJVMCI::HotSpotInstalledCode::set_codeStart(jvmciEnv, nmethod_mirror, 0);
824 if (HotSpotJVMCI::HotSpotNmethod::invalidationReason(jvmciEnv, nmethod_mirror) ==
825 static_cast<int>(nmethod::InvalidationReason::NOT_INVALIDATED)) {
826 HotSpotJVMCI::HotSpotNmethod::set_invalidationReason(jvmciEnv, nmethod_mirror, static_cast<int>(invalidation_reason));
827 }
828 } else if (nm->is_not_entrant()) {
829 // Zero the entry point so any new invocation will fail but keep
830 // the address link around that so that existing activations can
831 // be deoptimized via the mirror (i.e. JVMCIEnv::invalidate_installed_code).
832 HotSpotJVMCI::InstalledCode::set_entryPoint(jvmciEnv, nmethod_mirror, 0);
833 HotSpotJVMCI::HotSpotInstalledCode::set_codeStart(jvmciEnv, nmethod_mirror, 0);
834 if (HotSpotJVMCI::HotSpotNmethod::invalidationReason(jvmciEnv, nmethod_mirror) ==
835 static_cast<int>(nmethod::InvalidationReason::NOT_INVALIDATED)) {
836 HotSpotJVMCI::HotSpotNmethod::set_invalidationReason(jvmciEnv, nmethod_mirror, static_cast<int>(invalidation_reason));
837 }
838 }
839 }
840
841 if (_nmethod_mirror_index != -1 && nm->is_unloading()) {
842 // Drop the reference to the nmethod mirror object but don't clear the actual oop reference. Otherwise
843 // it would appear that the nmethod didn't need to be unloaded in the first place.
844 _nmethod_mirror_index = -1;
845 }
846 }
847
848 // Handles to objects in the Hotspot heap.
849 static OopStorage* object_handles() {
850 return Universe::vm_global();
851 }
852
853 jlong JVMCIRuntime::make_oop_handle(const Handle& obj) {
854 assert(!Universe::heap()->is_stw_gc_active(), "can't extend the root set during GC pause");
855 assert(oopDesc::is_oop(obj()), "not an oop");
856
857 oop* ptr = OopHandle(object_handles(), obj()).ptr_raw();
858 MutexLocker ml(_lock);
859 _oop_handles.append(ptr);
860 return reinterpret_cast<jlong>(ptr);
861 }
862
863 #ifdef ASSERT
864 bool JVMCIRuntime::is_oop_handle(jlong handle) {
865 const oop* ptr = (oop*) handle;
866 return object_handles()->allocation_status(ptr) == OopStorage::ALLOCATED_ENTRY;
867 }
868 #endif
869
870 int JVMCIRuntime::release_and_clear_oop_handles() {
871 guarantee(_num_attached_threads == cannot_be_attached, "only call during JVMCI runtime shutdown");
872 int released = release_cleared_oop_handles();
873 if (_oop_handles.length() != 0) {
874 for (int i = 0; i < _oop_handles.length(); i++) {
875 oop* oop_ptr = _oop_handles.at(i);
876 guarantee(oop_ptr != nullptr, "release_cleared_oop_handles left null entry in _oop_handles");
877 guarantee(NativeAccess<>::oop_load(oop_ptr) != nullptr, "unexpected cleared handle");
878 // Satisfy OopHandles::release precondition that all
879 // handles being released are null.
880 NativeAccess<>::oop_store(oop_ptr, (oop) nullptr);
881 }
882
883 // Do the bulk release
884 object_handles()->release(_oop_handles.adr_at(0), _oop_handles.length());
885 released += _oop_handles.length();
886 }
887 _oop_handles.clear();
888 return released;
889 }
890
891 static bool is_referent_non_null(oop* handle) {
892 return handle != nullptr && NativeAccess<>::oop_load(handle) != nullptr;
893 }
894
895 // Swaps the elements in `array` at index `a` and index `b`
896 static void swap(GrowableArray<oop*>* array, int a, int b) {
897 oop* tmp = array->at(a);
898 array->at_put(a, array->at(b));
899 array->at_put(b, tmp);
900 }
901
902 int JVMCIRuntime::release_cleared_oop_handles() {
903 // Despite this lock, it's possible for another thread
904 // to clear a handle's referent concurrently (e.g., a thread
905 // executing IndirectHotSpotObjectConstantImpl.clear()).
906 // This is benign - it means there can still be cleared
907 // handles in _oop_handles when this method returns.
908 MutexLocker ml(_lock);
909
910 int next = 0;
911 if (_oop_handles.length() != 0) {
912 // Key for _oop_handles contents in example below:
913 // H: handle with non-null referent
914 // h: handle with clear (i.e., null) referent
915 // -: null entry
916
917 // Shuffle all handles with non-null referents to the front of the list
918 // Example: Before: 0HHh-Hh-
919 // After: HHHh--h-
920 for (int i = 0; i < _oop_handles.length(); i++) {
921 oop* handle = _oop_handles.at(i);
922 if (is_referent_non_null(handle)) {
923 if (i != next && !is_referent_non_null(_oop_handles.at(next))) {
924 // Swap elements at index `next` and `i`
925 swap(&_oop_handles, next, i);
926 }
927 next++;
928 }
929 }
930
931 // `next` is now the index of the first null handle or handle with a null referent
932 int num_alive = next;
933
934 // Shuffle all null handles to the end of the list
935 // Example: Before: HHHh--h-
936 // After: HHHhh---
937 // num_alive: 3
938 for (int i = next; i < _oop_handles.length(); i++) {
939 oop* handle = _oop_handles.at(i);
940 if (handle != nullptr) {
941 if (i != next && _oop_handles.at(next) == nullptr) {
942 // Swap elements at index `next` and `i`
943 swap(&_oop_handles, next, i);
944 }
945 next++;
946 }
947 }
948 if (next != num_alive) {
949 int to_release = next - num_alive;
950
951 // `next` is now the index of the first null handle
952 // Example: to_release: 2
953
954 // Bulk release the handles with a null referent
955 object_handles()->release(_oop_handles.adr_at(num_alive), to_release);
956
957 // Truncate oop handles to only those with a non-null referent
958 JVMCI_event_2("compacted oop handles in JVMCI runtime %d from %d to %d", _id, _oop_handles.length(), num_alive);
959 _oop_handles.trunc_to(num_alive);
960 // Example: HHH
961
962 return to_release;
963 }
964 }
965 return 0;
966 }
967
968 jmetadata JVMCIRuntime::allocate_handle(const methodHandle& handle) {
969 MutexLocker ml(_lock);
970 return _metadata_handles->allocate_handle(handle);
971 }
972
973 jmetadata JVMCIRuntime::allocate_handle(const constantPoolHandle& handle) {
974 MutexLocker ml(_lock);
975 return _metadata_handles->allocate_handle(handle);
976 }
977
978 void JVMCIRuntime::release_handle(jmetadata handle) {
979 MutexLocker ml(_lock);
980 _metadata_handles->chain_free_list(handle);
981 }
982
983 // Function for redirecting shared library JavaVM output to tty
984 static void _log(const char* buf, size_t count) {
985 tty->write((char*) buf, count);
986 }
987
988 // Function for redirecting shared library JavaVM fatal error data to a log file.
989 // The log file is opened on first call to this function.
990 static void _fatal_log(const char* buf, size_t count) {
991 JVMCI::fatal_log(buf, count);
992 }
993
994 // Function for shared library JavaVM to flush tty
995 static void _flush_log() {
996 tty->flush();
997 }
998
999 // Function for shared library JavaVM to exit HotSpot on a fatal error
1000 static void _fatal() {
1001 Thread* thread = Thread::current_or_null_safe();
1002 if (thread != nullptr && thread->is_Java_thread()) {
1003 JavaThread* jthread = JavaThread::cast(thread);
1004 JVMCIRuntime* runtime = jthread->libjvmci_runtime();
1005 if (runtime != nullptr) {
1006 int javaVM_id = runtime->get_shared_library_javavm_id();
1007 fatal("Fatal error in JVMCI shared library JavaVM[%d] owned by JVMCI runtime %d", javaVM_id, runtime->id());
1008 }
1009 }
1010 intx current_thread_id = os::current_thread_id();
1011 fatal("thread %zd: Fatal error in JVMCI shared library", current_thread_id);
1012 }
1013
1014 JVMCIRuntime::JVMCIRuntime(JVMCIRuntime* next, int id, bool for_compile_broker) :
1015 _init_state(uninitialized),
1016 _shared_library_javavm(nullptr),
1017 _shared_library_javavm_id(0),
1018 _id(id),
1019 _next(next),
1020 _metadata_handles(new MetadataHandles()),
1021 _oop_handles(100, mtJVMCI),
1022 _num_attached_threads(0),
1023 _for_compile_broker(for_compile_broker)
1024 {
1025 if (id == -1) {
1026 _lock = JVMCIRuntime_lock;
1027 } else {
1028 stringStream lock_name;
1029 lock_name.print("%s@%d", JVMCIRuntime_lock->name(), id);
1030 Mutex::Rank lock_rank = DEBUG_ONLY(JVMCIRuntime_lock->rank()) NOT_DEBUG(Mutex::safepoint);
1031 _lock = new PaddedMonitor(lock_rank, lock_name.as_string(/*c_heap*/true));
1032 }
1033 JVMCI_event_1("created new %s JVMCI runtime %d (" PTR_FORMAT ")",
1034 id == -1 ? "Java" : for_compile_broker ? "CompileBroker" : "Compiler", id, p2i(this));
1035 }
1036
1037 JVMCIRuntime* JVMCIRuntime::select_runtime_in_shutdown(JavaThread* thread) {
1038 assert(JVMCI_lock->owner() == thread, "must be");
1039 // When shutting down, use the first available runtime.
1040 for (JVMCIRuntime* runtime = JVMCI::_compiler_runtimes; runtime != nullptr; runtime = runtime->_next) {
1041 if (runtime->_num_attached_threads != cannot_be_attached) {
1042 runtime->pre_attach_thread(thread);
1043 JVMCI_event_1("using pre-existing JVMCI runtime %d in shutdown", runtime->id());
1044 return runtime;
1045 }
1046 }
1047 // Lazily initialize JVMCI::_shutdown_compiler_runtime. Safe to
1048 // do here since JVMCI_lock is locked.
1049 if (JVMCI::_shutdown_compiler_runtime == nullptr) {
1050 JVMCI::_shutdown_compiler_runtime = new JVMCIRuntime(nullptr, -2, true);
1051 }
1052 JVMCIRuntime* runtime = JVMCI::_shutdown_compiler_runtime;
1053 JVMCI_event_1("using reserved shutdown JVMCI runtime %d", runtime->id());
1054 return runtime;
1055 }
1056
1057 JVMCIRuntime* JVMCIRuntime::select_runtime(JavaThread* thread, JVMCIRuntime* skip, int* count) {
1058 assert(JVMCI_lock->owner() == thread, "must be");
1059 bool for_compile_broker = thread->is_Compiler_thread();
1060 for (JVMCIRuntime* runtime = JVMCI::_compiler_runtimes; runtime != nullptr; runtime = runtime->_next) {
1061 if (count != nullptr) {
1062 (*count)++;
1063 }
1064 if (for_compile_broker == runtime->_for_compile_broker) {
1065 int count = runtime->_num_attached_threads;
1066 if (count == cannot_be_attached || runtime == skip) {
1067 // Cannot attach to rt
1068 continue;
1069 }
1070 // If selecting for repacking, ignore a runtime without an existing JavaVM
1071 if (skip != nullptr && !runtime->has_shared_library_javavm()) {
1072 continue;
1073 }
1074
1075 // Select first runtime with sufficient capacity
1076 if (count < (int) JVMCIThreadsPerNativeLibraryRuntime) {
1077 runtime->pre_attach_thread(thread);
1078 return runtime;
1079 }
1080 }
1081 }
1082 return nullptr;
1083 }
1084
1085 JVMCIRuntime* JVMCIRuntime::select_or_create_runtime(JavaThread* thread) {
1086 assert(JVMCI_lock->owner() == thread, "must be");
1087 int id = 0;
1088 JVMCIRuntime* runtime;
1089 if (JVMCI::using_singleton_shared_library_runtime()) {
1090 runtime = JVMCI::_compiler_runtimes;
1091 guarantee(runtime != nullptr, "must be");
1092 while (runtime->_num_attached_threads == cannot_be_attached) {
1093 // Since there is only a singleton JVMCIRuntime, we
1094 // need to wait for it to be available for attaching.
1095 JVMCI_lock->wait();
1096 }
1097 runtime->pre_attach_thread(thread);
1098 } else {
1099 runtime = select_runtime(thread, nullptr, &id);
1100 }
1101 if (runtime == nullptr) {
1102 runtime = new JVMCIRuntime(JVMCI::_compiler_runtimes, id, thread->is_Compiler_thread());
1103 JVMCI::_compiler_runtimes = runtime;
1104 runtime->pre_attach_thread(thread);
1105 }
1106 return runtime;
1107 }
1108
1109 JVMCIRuntime* JVMCIRuntime::for_thread(JavaThread* thread) {
1110 assert(thread->libjvmci_runtime() == nullptr, "must be");
1111 // Find the runtime with fewest attached threads
1112 JVMCIRuntime* runtime = nullptr;
1113 {
1114 MutexLocker locker(JVMCI_lock);
1115 runtime = JVMCI::in_shutdown() ? select_runtime_in_shutdown(thread) : select_or_create_runtime(thread);
1116 }
1117 runtime->attach_thread(thread);
1118 return runtime;
1119 }
1120
1121 const char* JVMCIRuntime::attach_shared_library_thread(JavaThread* thread, JavaVM* javaVM) {
1122 MutexLocker locker(JVMCI_lock);
1123 for (JVMCIRuntime* runtime = JVMCI::_compiler_runtimes; runtime != nullptr; runtime = runtime->_next) {
1124 if (runtime->_shared_library_javavm == javaVM) {
1125 if (runtime->_num_attached_threads == cannot_be_attached) {
1126 return "Cannot attach to JVMCI runtime that is shutting down";
1127 }
1128 runtime->pre_attach_thread(thread);
1129 runtime->attach_thread(thread);
1130 return nullptr;
1131 }
1132 }
1133 return "Cannot find JVMCI runtime";
1134 }
1135
1136 void JVMCIRuntime::pre_attach_thread(JavaThread* thread) {
1137 assert(JVMCI_lock->owner() == thread, "must be");
1138 _num_attached_threads++;
1139 }
1140
1141 void JVMCIRuntime::attach_thread(JavaThread* thread) {
1142 assert(thread->libjvmci_runtime() == nullptr, "must be");
1143 thread->set_libjvmci_runtime(this);
1144 guarantee(this == JVMCI::_shutdown_compiler_runtime ||
1145 _num_attached_threads > 0,
1146 "missing reservation in JVMCI runtime %d: _num_attached_threads=%d", _id, _num_attached_threads);
1147 JVMCI_event_1("attached to JVMCI runtime %d%s", _id, JVMCI::in_shutdown() ? " [in JVMCI shutdown]" : "");
1148 }
1149
1150 void JVMCIRuntime::repack(JavaThread* thread) {
1151 JVMCIRuntime* new_runtime = nullptr;
1152 {
1153 MutexLocker locker(JVMCI_lock);
1154 if (JVMCI::using_singleton_shared_library_runtime() || _num_attached_threads != 1 || JVMCI::in_shutdown()) {
1155 return;
1156 }
1157 new_runtime = select_runtime(thread, this, nullptr);
1158 }
1159 if (new_runtime != nullptr) {
1160 JVMCI_event_1("Moving thread from JVMCI runtime %d to JVMCI runtime %d (%d attached)", _id, new_runtime->_id, new_runtime->_num_attached_threads - 1);
1161 detach_thread(thread, "moving thread to another JVMCI runtime");
1162 new_runtime->attach_thread(thread);
1163 }
1164 }
1165
1166 bool JVMCIRuntime::detach_thread(JavaThread* thread, const char* reason, bool can_destroy_javavm) {
1167 if (this == JVMCI::_shutdown_compiler_runtime || JVMCI::in_shutdown()) {
1168 // Do minimal work when shutting down JVMCI
1169 thread->set_libjvmci_runtime(nullptr);
1170 return false;
1171 }
1172 bool should_shutdown;
1173 bool destroyed_javavm = false;
1174 {
1175 MutexLocker locker(JVMCI_lock);
1176 _num_attached_threads--;
1177 JVMCI_event_1("detaching from JVMCI runtime %d: %s (%d other threads still attached)", _id, reason, _num_attached_threads);
1178 should_shutdown = _num_attached_threads == 0 && !JVMCI::in_shutdown();
1179 if (should_shutdown && !can_destroy_javavm) {
1180 // If it's not possible to destroy the JavaVM on this thread then the VM must
1181 // not be shutdown. This can happen when a shared library thread is the last
1182 // thread to detach from a shared library JavaVM (e.g. GraalServiceThread).
1183 JVMCI_event_1("Cancelled shut down of JVMCI runtime %d", _id);
1184 should_shutdown = false;
1185 }
1186 if (should_shutdown) {
1187 // Prevent other threads from attaching to this runtime
1188 // while it is shutting down and destroying its JavaVM
1189 _num_attached_threads = cannot_be_attached;
1190 }
1191 }
1192 if (should_shutdown) {
1193 // Release the JavaVM resources associated with this
1194 // runtime once there are no threads attached to it.
1195 shutdown();
1196 if (can_destroy_javavm) {
1197 destroyed_javavm = destroy_shared_library_javavm();
1198 if (destroyed_javavm) {
1199 // Can release all handles now that there's no code executing
1200 // that could be using them. Handles for the Java JVMCI runtime
1201 // are never released as we cannot guarantee all compiler threads
1202 // using it have been stopped.
1203 int released = release_and_clear_oop_handles();
1204 JVMCI_event_1("releasing handles for JVMCI runtime %d: oop handles=%d, metadata handles={total=%d, live=%d, blocks=%d}",
1205 _id,
1206 released,
1207 _metadata_handles->num_handles(),
1208 _metadata_handles->num_handles() - _metadata_handles->num_free_handles(),
1209 _metadata_handles->num_blocks());
1210
1211 // No need to acquire _lock since this is the only thread accessing this runtime
1212 _metadata_handles->clear();
1213 }
1214 }
1215 // Allow other threads to attach to this runtime now
1216 MutexLocker locker(JVMCI_lock);
1217 _num_attached_threads = 0;
1218 if (JVMCI::using_singleton_shared_library_runtime()) {
1219 // Notify any thread waiting to attach to the
1220 // singleton JVMCIRuntime
1221 JVMCI_lock->notify();
1222 }
1223 }
1224 thread->set_libjvmci_runtime(nullptr);
1225 JVMCI_event_1("detached from JVMCI runtime %d", _id);
1226 return destroyed_javavm;
1227 }
1228
1229 JNIEnv* JVMCIRuntime::init_shared_library_javavm(int* create_JavaVM_err, const char** err_msg) {
1230 MutexLocker locker(_lock);
1231 JavaVM* javaVM = _shared_library_javavm;
1232 if (javaVM == nullptr) {
1233 #ifdef ASSERT
1234 const char* val = Arguments::PropertyList_get_value(Arguments::system_properties(), "test.jvmci.forceEnomemOnLibjvmciInit");
1235 if (val != nullptr && strcmp(val, "true") == 0) {
1236 *create_JavaVM_err = JNI_ENOMEM;
1237 return nullptr;
1238 }
1239 #endif
1240
1241 char* sl_path;
1242 void* sl_handle = JVMCI::get_shared_library(sl_path, true);
1243
1244 jint (*JNI_CreateJavaVM)(JavaVM **pvm, void **penv, void *args);
1245 typedef jint (*JNI_CreateJavaVM_t)(JavaVM **pvm, void **penv, void *args);
1246
1247 JNI_CreateJavaVM = CAST_TO_FN_PTR(JNI_CreateJavaVM_t, os::dll_lookup(sl_handle, "JNI_CreateJavaVM"));
1248 if (JNI_CreateJavaVM == nullptr) {
1249 fatal("Unable to find JNI_CreateJavaVM in %s", sl_path);
1250 }
1251
1252 ResourceMark rm;
1253 JavaVMInitArgs vm_args;
1254 vm_args.version = JNI_VERSION_1_2;
1255 vm_args.ignoreUnrecognized = JNI_TRUE;
1256 JavaVMOption options[6];
1257 jlong javaVM_id = 0;
1258
1259 // Protocol: JVMCI shared library JavaVM should support a non-standard "_javavm_id"
1260 // option whose extraInfo info field is a pointer to which a unique id for the
1261 // JavaVM should be written.
1262 options[0].optionString = (char*) "_javavm_id";
1263 options[0].extraInfo = &javaVM_id;
1264
1265 options[1].optionString = (char*) "_log";
1266 options[1].extraInfo = (void*) _log;
1267 options[2].optionString = (char*) "_flush_log";
1268 options[2].extraInfo = (void*) _flush_log;
1269 options[3].optionString = (char*) "_fatal";
1270 options[3].extraInfo = (void*) _fatal;
1271 options[4].optionString = (char*) "_fatal_log";
1272 options[4].extraInfo = (void*) _fatal_log;
1273 options[5].optionString = (char*) "_createvm_errorstr";
1274 options[5].extraInfo = (void*) err_msg;
1275
1276 vm_args.version = JNI_VERSION_1_2;
1277 vm_args.options = options;
1278 vm_args.nOptions = sizeof(options) / sizeof(JavaVMOption);
1279
1280 JNIEnv* env = nullptr;
1281 int result = (*JNI_CreateJavaVM)(&javaVM, (void**) &env, &vm_args);
1282 if (result == JNI_OK) {
1283 guarantee(env != nullptr, "missing env");
1284 _shared_library_javavm_id = javaVM_id;
1285 _shared_library_javavm = javaVM;
1286 JVMCI_event_1("created JavaVM[%ld]@" PTR_FORMAT " for JVMCI runtime %d", javaVM_id, p2i(javaVM), _id);
1287 return env;
1288 } else {
1289 *create_JavaVM_err = result;
1290 }
1291 }
1292 return nullptr;
1293 }
1294
1295 void JVMCIRuntime::init_JavaVM_info(jlongArray info, JVMCI_TRAPS) {
1296 if (info != nullptr) {
1297 typeArrayOop info_oop = (typeArrayOop) JNIHandles::resolve(info);
1298 if (info_oop->length() < 4) {
1299 JVMCI_THROW_MSG(ArrayIndexOutOfBoundsException, err_msg("%d < 4", info_oop->length()));
1300 }
1301 JavaVM* javaVM = _shared_library_javavm;
1302 info_oop->long_at_put(0, (jlong) (address) javaVM);
1303 info_oop->long_at_put(1, (jlong) (address) javaVM->functions->reserved0);
1304 info_oop->long_at_put(2, (jlong) (address) javaVM->functions->reserved1);
1305 info_oop->long_at_put(3, (jlong) (address) javaVM->functions->reserved2);
1306 }
1307 }
1308
1309 #define JAVAVM_CALL_BLOCK \
1310 guarantee(thread != nullptr && _shared_library_javavm != nullptr, "npe"); \
1311 ThreadToNativeFromVM ttnfv(thread); \
1312 JavaVM* javavm = _shared_library_javavm;
1313
1314 jint JVMCIRuntime::AttachCurrentThread(JavaThread* thread, void **penv, void *args) {
1315 JAVAVM_CALL_BLOCK
1316 return javavm->AttachCurrentThread(penv, args);
1317 }
1318
1319 jint JVMCIRuntime::AttachCurrentThreadAsDaemon(JavaThread* thread, void **penv, void *args) {
1320 JAVAVM_CALL_BLOCK
1321 return javavm->AttachCurrentThreadAsDaemon(penv, args);
1322 }
1323
1324 jint JVMCIRuntime::DetachCurrentThread(JavaThread* thread) {
1325 JAVAVM_CALL_BLOCK
1326 return javavm->DetachCurrentThread();
1327 }
1328
1329 jint JVMCIRuntime::GetEnv(JavaThread* thread, void **penv, jint version) {
1330 JAVAVM_CALL_BLOCK
1331 return javavm->GetEnv(penv, version);
1332 }
1333 #undef JAVAVM_CALL_BLOCK \
1334
1335 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(JVMCI_TRAPS) {
1336 if (is_HotSpotJVMCIRuntime_initialized()) {
1337 if (JVMCIENV->is_hotspot() && UseJVMCINativeLibrary) {
1338 JVMCI_THROW_MSG(InternalError, "JVMCI has already been enabled in the JVMCI shared library");
1339 }
1340 }
1341
1342 initialize(JVMCI_CHECK);
1343
1344 // This should only be called in the context of the JVMCI class being initialized
1345 JVMCIObject result = JVMCIENV->call_HotSpotJVMCIRuntime_runtime(JVMCI_CHECK);
1346 result = JVMCIENV->make_global(result);
1347
1348 OrderAccess::storestore(); // Ensure handle is fully constructed before publishing
1349 _HotSpotJVMCIRuntime_instance = result;
1350
1351 JVMCI::_is_initialized = true;
1352 }
1353
1354 JVMCIRuntime::InitState JVMCIRuntime::_shared_library_javavm_refs_init_state = JVMCIRuntime::uninitialized;
1355 JVMCIRuntime::InitState JVMCIRuntime::_hotspot_javavm_refs_init_state = JVMCIRuntime::uninitialized;
1356
1357 class JavaVMRefsInitialization: public StackObj {
1358 JVMCIRuntime::InitState *_state;
1359 int _id;
1360 public:
1361 JavaVMRefsInitialization(JVMCIRuntime::InitState *state, int id) {
1362 _state = state;
1363 _id = id;
1364 // All classes, methods and fields in the JVMCI shared library
1365 // are in the read-only part of the image. As such, these
1366 // values (and any global handle derived from them via NewGlobalRef)
1367 // are the same for all JavaVM instances created in the
1368 // shared library which means they only need to be initialized
1369 // once. In non-product mode, we check this invariant.
1370 // See com.oracle.svm.jni.JNIImageHeapHandles.
1371 // The same is true for Klass* and field offsets in HotSpotJVMCI.
1372 if (*state == JVMCIRuntime::uninitialized DEBUG_ONLY( || true)) {
1373 *state = JVMCIRuntime::being_initialized;
1374 JVMCI_event_1("initializing JavaVM references in JVMCI runtime %d", id);
1375 } else {
1376 while (*state != JVMCIRuntime::fully_initialized) {
1377 JVMCI_event_1("waiting for JavaVM references initialization in JVMCI runtime %d", id);
1378 JVMCI_lock->wait();
1379 }
1380 JVMCI_event_1("done waiting for JavaVM references initialization in JVMCI runtime %d", id);
1381 }
1382 }
1383
1384 ~JavaVMRefsInitialization() {
1385 if (*_state == JVMCIRuntime::being_initialized) {
1386 *_state = JVMCIRuntime::fully_initialized;
1387 JVMCI_event_1("initialized JavaVM references in JVMCI runtime %d", _id);
1388 JVMCI_lock->notify_all();
1389 }
1390 }
1391
1392 bool should_init() {
1393 return *_state == JVMCIRuntime::being_initialized;
1394 }
1395 };
1396
1397 void JVMCIRuntime::initialize(JVMCI_TRAPS) {
1398 // Check first without _lock
1399 if (_init_state == fully_initialized) {
1400 return;
1401 }
1402
1403 JavaThread* THREAD = JavaThread::current();
1404
1405 MutexLocker locker(_lock);
1406 // Check again under _lock
1407 if (_init_state == fully_initialized) {
1408 return;
1409 }
1410
1411 while (_init_state == being_initialized) {
1412 JVMCI_event_1("waiting for initialization of JVMCI runtime %d", _id);
1413 _lock->wait();
1414 if (_init_state == fully_initialized) {
1415 JVMCI_event_1("done waiting for initialization of JVMCI runtime %d", _id);
1416 return;
1417 }
1418 }
1419
1420 JVMCI_event_1("initializing JVMCI runtime %d", _id);
1421 _init_state = being_initialized;
1422
1423 {
1424 MutexUnlocker unlock(_lock);
1425
1426 HandleMark hm(THREAD);
1427 ResourceMark rm(THREAD);
1428 {
1429 MutexLocker lock_jvmci(JVMCI_lock);
1430 if (JVMCIENV->is_hotspot()) {
1431 JavaVMRefsInitialization initialization(&_hotspot_javavm_refs_init_state, _id);
1432 if (initialization.should_init()) {
1433 MutexUnlocker unlock_jvmci(JVMCI_lock);
1434 HotSpotJVMCI::compute_offsets(CHECK_EXIT);
1435 }
1436 } else {
1437 JavaVMRefsInitialization initialization(&_shared_library_javavm_refs_init_state, _id);
1438 if (initialization.should_init()) {
1439 MutexUnlocker unlock_jvmci(JVMCI_lock);
1440 JNIAccessMark jni(JVMCIENV, THREAD);
1441
1442 JNIJVMCI::initialize_ids(jni.env());
1443 if (jni()->ExceptionCheck()) {
1444 jni()->ExceptionDescribe();
1445 fatal("JNI exception during init");
1446 }
1447 // _lock is re-locked at this point
1448 }
1449 }
1450 }
1451
1452 if (!JVMCIENV->is_hotspot()) {
1453 JNIAccessMark jni(JVMCIENV, THREAD);
1454 JNIJVMCI::register_natives(jni.env());
1455 }
1456 create_jvmci_primitive_type(T_BOOLEAN, JVMCI_CHECK_EXIT_((void)0));
1457 create_jvmci_primitive_type(T_BYTE, JVMCI_CHECK_EXIT_((void)0));
1458 create_jvmci_primitive_type(T_CHAR, JVMCI_CHECK_EXIT_((void)0));
1459 create_jvmci_primitive_type(T_SHORT, JVMCI_CHECK_EXIT_((void)0));
1460 create_jvmci_primitive_type(T_INT, JVMCI_CHECK_EXIT_((void)0));
1461 create_jvmci_primitive_type(T_LONG, JVMCI_CHECK_EXIT_((void)0));
1462 create_jvmci_primitive_type(T_FLOAT, JVMCI_CHECK_EXIT_((void)0));
1463 create_jvmci_primitive_type(T_DOUBLE, JVMCI_CHECK_EXIT_((void)0));
1464 create_jvmci_primitive_type(T_VOID, JVMCI_CHECK_EXIT_((void)0));
1465
1466 DEBUG_ONLY(CodeInstaller::verify_bci_constants(JVMCIENV);)
1467 }
1468
1469 _init_state = fully_initialized;
1470 JVMCI_event_1("initialized JVMCI runtime %d", _id);
1471 _lock->notify_all();
1472 }
1473
1474 JVMCIObject JVMCIRuntime::create_jvmci_primitive_type(BasicType type, JVMCI_TRAPS) {
1475 JavaThread* THREAD = JavaThread::current(); // For exception macros.
1476 // These primitive types are long lived and are created before the runtime is fully set up
1477 // so skip registering them for scanning.
1478 JVMCIObject mirror = JVMCIENV->get_object_constant(java_lang_Class::primitive_mirror(type), false, true);
1479 if (JVMCIENV->is_hotspot()) {
1480 JavaValue result(T_OBJECT);
1481 JavaCallArguments args;
1482 args.push_oop(Handle(THREAD, HotSpotJVMCI::resolve(mirror)));
1483 args.push_int(type2char(type));
1484 JavaCalls::call_static(&result, HotSpotJVMCI::HotSpotResolvedPrimitiveType::klass(), vmSymbols::fromMetaspace_name(), vmSymbols::primitive_fromMetaspace_signature(), &args, CHECK_(JVMCIObject()));
1485
1486 return JVMCIENV->wrap(JNIHandles::make_local(result.get_oop()));
1487 } else {
1488 JNIAccessMark jni(JVMCIENV);
1489 jobject result = jni()->CallStaticObjectMethod(JNIJVMCI::HotSpotResolvedPrimitiveType::clazz(),
1490 JNIJVMCI::HotSpotResolvedPrimitiveType_fromMetaspace_method(),
1491 mirror.as_jobject(), type2char(type));
1492 if (jni()->ExceptionCheck()) {
1493 return JVMCIObject();
1494 }
1495 return JVMCIENV->wrap(result);
1496 }
1497 }
1498
1499 void JVMCIRuntime::initialize_JVMCI(JVMCI_TRAPS) {
1500 if (!is_HotSpotJVMCIRuntime_initialized()) {
1501 initialize(JVMCI_CHECK);
1502 JVMCIENV->call_JVMCI_getRuntime(JVMCI_CHECK);
1503 guarantee(_HotSpotJVMCIRuntime_instance.is_non_null(), "NPE in JVMCI runtime %d", _id);
1504 }
1505 }
1506
1507 JVMCIObject JVMCIRuntime::get_HotSpotJVMCIRuntime(JVMCI_TRAPS) {
1508 initialize(JVMCI_CHECK_(JVMCIObject()));
1509 initialize_JVMCI(JVMCI_CHECK_(JVMCIObject()));
1510 return _HotSpotJVMCIRuntime_instance;
1511 }
1512
1513 // Implementation of CompilerToVM.registerNatives()
1514 // When called from libjvmci, `libjvmciOrHotspotEnv` is a libjvmci env so use JVM_ENTRY_NO_ENV.
1515 JVM_ENTRY_NO_ENV(void, JVM_RegisterJVMCINatives(JNIEnv *libjvmciOrHotspotEnv, jclass c2vmClass))
1516 JVMCIENV_FROM_JNI(thread, libjvmciOrHotspotEnv);
1517
1518 if (!EnableJVMCI) {
1519 JVMCI_THROW_MSG(InternalError, JVMCI_NOT_ENABLED_ERROR_MESSAGE);
1520 }
1521
1522 JVMCIENV->runtime()->initialize(JVMCIENV);
1523
1524 {
1525 ResourceMark rm(thread);
1526 HandleMark hm(thread);
1527 ThreadToNativeFromVM trans(thread);
1528
1529 // Ensure _non_oop_bits is initialized
1530 Universe::non_oop_word();
1531 JNIEnv *env = libjvmciOrHotspotEnv;
1532 if (JNI_OK != env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count())) {
1533 if (!env->ExceptionCheck()) {
1534 for (int i = 0; i < CompilerToVM::methods_count(); i++) {
1535 if (JNI_OK != env->RegisterNatives(c2vmClass, CompilerToVM::methods + i, 1)) {
1536 guarantee(false, "Error registering JNI method %s%s", CompilerToVM::methods[i].name, CompilerToVM::methods[i].signature);
1537 break;
1538 }
1539 }
1540 } else {
1541 env->ExceptionDescribe();
1542 }
1543 guarantee(false, "Failed registering CompilerToVM native methods");
1544 }
1545 }
1546 JVM_END
1547
1548
1549 void JVMCIRuntime::shutdown() {
1550 if (_HotSpotJVMCIRuntime_instance.is_non_null()) {
1551 JVMCI_event_1("shutting down HotSpotJVMCIRuntime for JVMCI runtime %d", _id);
1552 JVMCIEnv __stack_jvmci_env__(JavaThread::current(), _HotSpotJVMCIRuntime_instance.is_hotspot(),__FILE__, __LINE__);
1553 JVMCIEnv* JVMCIENV = &__stack_jvmci_env__;
1554 if (JVMCIENV->init_error() == JNI_OK) {
1555 JVMCIENV->call_HotSpotJVMCIRuntime_shutdown(_HotSpotJVMCIRuntime_instance);
1556 } else {
1557 JVMCI_event_1("Error in JVMCIEnv for shutdown (err: %d)", JVMCIENV->init_error());
1558 }
1559 if (_num_attached_threads == cannot_be_attached) {
1560 // Only when no other threads are attached to this runtime
1561 // is it safe to reset these fields.
1562 _HotSpotJVMCIRuntime_instance = JVMCIObject();
1563 _init_state = uninitialized;
1564 JVMCI_event_1("shut down JVMCI runtime %d", _id);
1565 }
1566 }
1567 }
1568
1569 bool JVMCIRuntime::destroy_shared_library_javavm() {
1570 guarantee(_num_attached_threads == cannot_be_attached,
1571 "cannot destroy JavaVM for JVMCI runtime %d with %d attached threads", _id, _num_attached_threads);
1572 JavaVM* javaVM;
1573 jlong javaVM_id = _shared_library_javavm_id;
1574 {
1575 // Exactly one thread can destroy the JavaVM
1576 // and release the handle to it.
1577 MutexLocker only_one(_lock);
1578 javaVM = _shared_library_javavm;
1579 if (javaVM != nullptr) {
1580 _shared_library_javavm = nullptr;
1581 _shared_library_javavm_id = 0;
1582 }
1583 }
1584 if (javaVM != nullptr) {
1585 int result;
1586 {
1587 // Must transition into native before calling into libjvmci
1588 ThreadToNativeFromVM ttnfv(JavaThread::current());
1589 result = javaVM->DestroyJavaVM();
1590 }
1591 if (result == JNI_OK) {
1592 JVMCI_event_1("destroyed JavaVM[" JLONG_FORMAT "]@" PTR_FORMAT " for JVMCI runtime %d", javaVM_id, p2i(javaVM), _id);
1593 } else {
1594 warning("Non-zero result (%d) when calling JNI_DestroyJavaVM on JavaVM[" JLONG_FORMAT "]@" PTR_FORMAT, result, javaVM_id, p2i(javaVM));
1595 }
1596 return true;
1597 }
1598 return false;
1599 }
1600
1601 void JVMCIRuntime::bootstrap_finished(TRAPS) {
1602 if (_HotSpotJVMCIRuntime_instance.is_non_null()) {
1603 JVMCIENV_FROM_THREAD(THREAD);
1604 JVMCIENV->check_init(CHECK);
1605 JVMCIENV->call_HotSpotJVMCIRuntime_bootstrapFinished(_HotSpotJVMCIRuntime_instance, JVMCIENV);
1606 }
1607 }
1608
1609 void JVMCIRuntime::describe_pending_hotspot_exception(JavaThread* THREAD) {
1610 if (HAS_PENDING_EXCEPTION) {
1611 Handle exception(THREAD, PENDING_EXCEPTION);
1612 CLEAR_PENDING_EXCEPTION;
1613 java_lang_Throwable::print_stack_trace(exception, tty);
1614
1615 // Clear and ignore any exceptions raised during printing
1616 CLEAR_PENDING_EXCEPTION;
1617 }
1618 }
1619
1620
1621 void JVMCIRuntime::fatal_exception(JVMCIEnv* JVMCIENV, const char* message) {
1622 JavaThread* THREAD = JavaThread::current(); // For exception macros.
1623
1624 static volatile int report_error = 0;
1625 if (!report_error && Atomic::cmpxchg(&report_error, 0, 1) == 0) {
1626 // Only report an error once
1627 tty->print_raw_cr(message);
1628 if (JVMCIENV != nullptr) {
1629 JVMCIENV->describe_pending_exception(tty);
1630 } else {
1631 describe_pending_hotspot_exception(THREAD);
1632 }
1633 } else {
1634 // Allow error reporting thread time to print the stack trace.
1635 THREAD->sleep(200);
1636 }
1637 fatal("Fatal JVMCI exception (see JVMCI Events for stack trace): %s", message);
1638 }
1639
1640 // ------------------------------------------------------------------
1641 // Note: the logic of this method should mirror the logic of
1642 // constantPoolOopDesc::verify_constant_pool_resolve.
1643 bool JVMCIRuntime::check_klass_accessibility(Klass* accessing_klass, Klass* resolved_klass) {
1644 if (accessing_klass->is_objArray_klass()) {
1645 accessing_klass = ObjArrayKlass::cast(accessing_klass)->bottom_klass();
1646 }
1647 if (!accessing_klass->is_instance_klass()) {
1648 return true;
1649 }
1650
1651 if (resolved_klass->is_objArray_klass()) {
1652 // Find the element klass, if this is an array.
1653 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
1654 }
1655 if (resolved_klass->is_instance_klass()) {
1656 Reflection::VerifyClassAccessResults result =
1657 Reflection::verify_class_access(accessing_klass, InstanceKlass::cast(resolved_klass), true);
1658 return result == Reflection::ACCESS_OK;
1659 }
1660 return true;
1661 }
1662
1663 // ------------------------------------------------------------------
1664 Klass* JVMCIRuntime::get_klass_by_name_impl(Klass*& accessing_klass,
1665 const constantPoolHandle& cpool,
1666 Symbol* sym,
1667 bool require_local) {
1668 JVMCI_EXCEPTION_CONTEXT;
1669
1670 // Now we need to check the SystemDictionary
1671 if (sym->char_at(0) == JVM_SIGNATURE_CLASS &&
1672 sym->char_at(sym->utf8_length()-1) == JVM_SIGNATURE_ENDCLASS) {
1673 // This is a name from a signature. Strip off the trimmings.
1674 // Call recursive to keep scope of strippedsym.
1675 TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1,
1676 sym->utf8_length()-2);
1677 return get_klass_by_name_impl(accessing_klass, cpool, strippedsym, require_local);
1678 }
1679
1680 Handle loader;
1681 if (accessing_klass != nullptr) {
1682 loader = Handle(THREAD, accessing_klass->class_loader());
1683 }
1684
1685 Klass* found_klass = require_local ?
1686 SystemDictionary::find_instance_or_array_klass(THREAD, sym, loader) :
1687 SystemDictionary::find_constrained_instance_or_array_klass(THREAD, sym, loader);
1688
1689 // If we fail to find an array klass, look again for its element type.
1690 // The element type may be available either locally or via constraints.
1691 // In either case, if we can find the element type in the system dictionary,
1692 // we must build an array type around it. The CI requires array klasses
1693 // to be loaded if their element klasses are loaded, except when memory
1694 // is exhausted.
1695 if (sym->char_at(0) == JVM_SIGNATURE_ARRAY &&
1696 (sym->char_at(1) == JVM_SIGNATURE_ARRAY || sym->char_at(1) == JVM_SIGNATURE_CLASS)) {
1697 // We have an unloaded array.
1698 // Build it on the fly if the element class exists.
1699 TempNewSymbol elem_sym = SymbolTable::new_symbol(sym->as_utf8()+1,
1700 sym->utf8_length()-1);
1701
1702 // Get element Klass recursively.
1703 Klass* elem_klass =
1704 get_klass_by_name_impl(accessing_klass,
1705 cpool,
1706 elem_sym,
1707 require_local);
1708 if (elem_klass != nullptr) {
1709 // Now make an array for it
1710 return elem_klass->array_klass(THREAD);
1711 }
1712 }
1713
1714 if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) {
1715 // Look inside the constant pool for pre-resolved class entries.
1716 for (int i = cpool->length() - 1; i >= 1; i--) {
1717 if (cpool->tag_at(i).is_klass()) {
1718 Klass* kls = cpool->resolved_klass_at(i);
1719 if (kls->name() == sym) {
1720 return kls;
1721 }
1722 }
1723 }
1724 }
1725
1726 return found_klass;
1727 }
1728
1729 // ------------------------------------------------------------------
1730 Klass* JVMCIRuntime::get_klass_by_name(Klass* accessing_klass,
1731 Symbol* klass_name,
1732 bool require_local) {
1733 ResourceMark rm;
1734 constantPoolHandle cpool;
1735 return get_klass_by_name_impl(accessing_klass,
1736 cpool,
1737 klass_name,
1738 require_local);
1739 }
1740
1741 // ------------------------------------------------------------------
1742 // Implementation of get_klass_by_index.
1743 Klass* JVMCIRuntime::get_klass_by_index_impl(const constantPoolHandle& cpool,
1744 int index,
1745 bool& is_accessible,
1746 Klass* accessor) {
1747 JVMCI_EXCEPTION_CONTEXT;
1748 Klass* klass = ConstantPool::klass_at_if_loaded(cpool, index);
1749 Symbol* klass_name = nullptr;
1750 if (klass == nullptr) {
1751 klass_name = cpool->klass_name_at(index);
1752 }
1753
1754 if (klass == nullptr) {
1755 // Not found in constant pool. Use the name to do the lookup.
1756 Klass* k = get_klass_by_name_impl(accessor,
1757 cpool,
1758 klass_name,
1759 false);
1760 // Calculate accessibility the hard way.
1761 if (k == nullptr) {
1762 is_accessible = false;
1763 } else if (k->class_loader() != accessor->class_loader() &&
1764 get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) {
1765 // Loaded only remotely. Not linked yet.
1766 is_accessible = false;
1767 } else {
1768 // Linked locally, and we must also check public/private, etc.
1769 is_accessible = check_klass_accessibility(accessor, k);
1770 }
1771 if (!is_accessible) {
1772 return nullptr;
1773 }
1774 return k;
1775 }
1776
1777 // It is known to be accessible, since it was found in the constant pool.
1778 is_accessible = true;
1779 return klass;
1780 }
1781
1782 // ------------------------------------------------------------------
1783 // Get a klass from the constant pool.
1784 Klass* JVMCIRuntime::get_klass_by_index(const constantPoolHandle& cpool,
1785 int index,
1786 bool& is_accessible,
1787 Klass* accessor) {
1788 ResourceMark rm;
1789 Klass* result = get_klass_by_index_impl(cpool, index, is_accessible, accessor);
1790 return result;
1791 }
1792
1793 // ------------------------------------------------------------------
1794 // Perform an appropriate method lookup based on accessor, holder,
1795 // name, signature, and bytecode.
1796 Method* JVMCIRuntime::lookup_method(InstanceKlass* accessor,
1797 Klass* holder,
1798 Symbol* name,
1799 Symbol* sig,
1800 Bytecodes::Code bc,
1801 constantTag tag) {
1802 // Accessibility checks are performed in JVMCIEnv::get_method_by_index_impl().
1803 assert(check_klass_accessibility(accessor, holder), "holder not accessible");
1804
1805 LinkInfo link_info(holder, name, sig, accessor,
1806 LinkInfo::AccessCheck::required,
1807 LinkInfo::LoaderConstraintCheck::required,
1808 tag);
1809 switch (bc) {
1810 case Bytecodes::_invokestatic:
1811 return LinkResolver::resolve_static_call_or_null(link_info);
1812 case Bytecodes::_invokespecial:
1813 return LinkResolver::resolve_special_call_or_null(link_info);
1814 case Bytecodes::_invokeinterface:
1815 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
1816 case Bytecodes::_invokevirtual:
1817 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
1818 default:
1819 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
1820 return nullptr; // silence compiler warnings
1821 }
1822 }
1823
1824
1825 // ------------------------------------------------------------------
1826 Method* JVMCIRuntime::get_method_by_index_impl(const constantPoolHandle& cpool,
1827 int index, Bytecodes::Code bc,
1828 InstanceKlass* accessor) {
1829 if (bc == Bytecodes::_invokedynamic) {
1830 if (cpool->resolved_indy_entry_at(index)->is_resolved()) {
1831 return cpool->resolved_indy_entry_at(index)->method();
1832 }
1833
1834 return nullptr;
1835 }
1836
1837 int holder_index = cpool->klass_ref_index_at(index, bc);
1838 bool holder_is_accessible;
1839 Klass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
1840
1841 // Get the method's name and signature.
1842 Symbol* name_sym = cpool->name_ref_at(index, bc);
1843 Symbol* sig_sym = cpool->signature_ref_at(index, bc);
1844
1845 if (cpool->has_preresolution()
1846 || ((holder == vmClasses::MethodHandle_klass() || holder == vmClasses::VarHandle_klass()) &&
1847 MethodHandles::is_signature_polymorphic_name(holder, name_sym))) {
1848 // Short-circuit lookups for JSR 292-related call sites.
1849 // That is, do not rely only on name-based lookups, because they may fail
1850 // if the names are not resolvable in the boot class loader (7056328).
1851 switch (bc) {
1852 case Bytecodes::_invokevirtual:
1853 case Bytecodes::_invokeinterface:
1854 case Bytecodes::_invokespecial:
1855 case Bytecodes::_invokestatic:
1856 {
1857 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
1858 if (m != nullptr) {
1859 return m;
1860 }
1861 }
1862 break;
1863 default:
1864 break;
1865 }
1866 }
1867
1868 if (holder_is_accessible) { // Our declared holder is loaded.
1869 constantTag tag = cpool->tag_ref_at(index, bc);
1870 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
1871 if (m != nullptr) {
1872 // We found the method.
1873 return m;
1874 }
1875 }
1876
1877 // Either the declared holder was not loaded, or the method could
1878 // not be found.
1879
1880 return nullptr;
1881 }
1882
1883 // ------------------------------------------------------------------
1884 InstanceKlass* JVMCIRuntime::get_instance_klass_for_declared_method_holder(Klass* method_holder) {
1885 // For the case of <array>.clone(), the method holder can be an ArrayKlass*
1886 // instead of an InstanceKlass*. For that case simply pretend that the
1887 // declared holder is Object.clone since that's where the call will bottom out.
1888 if (method_holder->is_instance_klass()) {
1889 return InstanceKlass::cast(method_holder);
1890 } else if (method_holder->is_array_klass()) {
1891 return vmClasses::Object_klass();
1892 } else {
1893 ShouldNotReachHere();
1894 }
1895 return nullptr;
1896 }
1897
1898
1899 // ------------------------------------------------------------------
1900 Method* JVMCIRuntime::get_method_by_index(const constantPoolHandle& cpool,
1901 int index, Bytecodes::Code bc,
1902 InstanceKlass* accessor) {
1903 ResourceMark rm;
1904 return get_method_by_index_impl(cpool, index, bc, accessor);
1905 }
1906
1907 // ------------------------------------------------------------------
1908 // Check for changes to the system dictionary during compilation
1909 // class loads, evolution, breakpoints
1910 JVMCI::CodeInstallResult JVMCIRuntime::validate_compile_task_dependencies(Dependencies* dependencies,
1911 JVMCICompileState* compile_state,
1912 char** failure_detail,
1913 bool& failing_dep_is_call_site)
1914 {
1915 failing_dep_is_call_site = false;
1916 // If JVMTI capabilities were enabled during compile, the compilation is invalidated.
1917 if (compile_state != nullptr && compile_state->jvmti_state_changed()) {
1918 *failure_detail = (char*) "Jvmti state change during compilation invalidated dependencies";
1919 return JVMCI::dependencies_failed;
1920 }
1921
1922 CompileTask* task = compile_state == nullptr ? nullptr : compile_state->task();
1923 Dependencies::DepType result = dependencies->validate_dependencies(task, failure_detail);
1924
1925 if (result == Dependencies::end_marker) {
1926 return JVMCI::ok;
1927 }
1928 if (result == Dependencies::call_site_target_value) {
1929 failing_dep_is_call_site = true;
1930 }
1931 return JVMCI::dependencies_failed;
1932 }
1933
1934 // Called after an upcall to `function` while compiling `method`.
1935 // If an exception occurred, it is cleared, the compilation state
1936 // is updated with the failure and this method returns true.
1937 // Otherwise, it returns false.
1938 static bool after_compiler_upcall(JVMCIEnv* JVMCIENV, JVMCICompiler* compiler, const methodHandle& method, const char* function) {
1939 if (JVMCIENV->has_pending_exception()) {
1940 ResourceMark rm;
1941 bool reason_on_C_heap = true;
1942 const char* pending_string = nullptr;
1943 const char* pending_stack_trace = nullptr;
1944 JVMCIENV->pending_exception_as_string(&pending_string, &pending_stack_trace);
1945 if (pending_string == nullptr) pending_string = "null";
1946 // Using stringStream instead of err_msg to avoid truncation
1947 stringStream st;
1948 st.print("uncaught exception in %s [%s]", function, pending_string);
1949 const char* failure_reason = os::strdup(st.freeze(), mtJVMCI);
1950 if (failure_reason == nullptr) {
1951 failure_reason = "uncaught exception";
1952 reason_on_C_heap = false;
1953 }
1954 JVMCI_event_1("%s", failure_reason);
1955 Log(jit, compilation) log;
1956 if (log.is_info()) {
1957 log.info("%s while compiling %s", failure_reason, method->name_and_sig_as_C_string());
1958 if (pending_stack_trace != nullptr) {
1959 LogStream ls(log.info());
1960 ls.print_raw_cr(pending_stack_trace);
1961 }
1962 }
1963 JVMCICompileState* compile_state = JVMCIENV->compile_state();
1964 compile_state->set_failure(true, failure_reason, reason_on_C_heap);
1965 compiler->on_upcall(failure_reason, compile_state);
1966 return true;
1967 }
1968 return false;
1969 }
1970
1971 void JVMCIRuntime::compile_method(JVMCIEnv* JVMCIENV, JVMCICompiler* compiler, const methodHandle& method, int entry_bci) {
1972 JVMCI_EXCEPTION_CONTEXT
1973
1974 JVMCICompileState* compile_state = JVMCIENV->compile_state();
1975
1976 bool is_osr = entry_bci != InvocationEntryBci;
1977 if (compiler->is_bootstrapping() && is_osr) {
1978 // no OSR compilations during bootstrap - the compiler is just too slow at this point,
1979 // and we know that there are no endless loops
1980 compile_state->set_failure(true, "No OSR during bootstrap");
1981 return;
1982 }
1983 if (JVMCI::in_shutdown()) {
1984 if (UseJVMCINativeLibrary) {
1985 JVMCIRuntime *runtime = JVMCI::compiler_runtime(thread, false);
1986 if (runtime != nullptr) {
1987 runtime->detach_thread(thread, "JVMCI shutdown pre-empted compilation");
1988 }
1989 }
1990 compile_state->set_failure(false, "Avoiding compilation during shutdown");
1991 return;
1992 }
1993
1994 HandleMark hm(thread);
1995 JVMCIObject receiver = get_HotSpotJVMCIRuntime(JVMCIENV);
1996 if (after_compiler_upcall(JVMCIENV, compiler, method, "get_HotSpotJVMCIRuntime")) {
1997 return;
1998 }
1999 JVMCIObject jvmci_method = JVMCIENV->get_jvmci_method(method, JVMCIENV);
2000 if (after_compiler_upcall(JVMCIENV, compiler, method, "get_jvmci_method")) {
2001 return;
2002 }
2003
2004 JVMCIObject result_object = JVMCIENV->call_HotSpotJVMCIRuntime_compileMethod(receiver, jvmci_method, entry_bci,
2005 (jlong) compile_state, compile_state->task()->compile_id());
2006 #ifdef ASSERT
2007 if (JVMCIENV->has_pending_exception()) {
2008 const char* val = Arguments::PropertyList_get_value(Arguments::system_properties(), "test.jvmci.compileMethodExceptionIsFatal");
2009 if (val != nullptr && strcmp(val, "true") == 0) {
2010 fatal_exception(JVMCIENV, "testing JVMCI fatal exception handling");
2011 }
2012 }
2013 #endif
2014
2015 if (after_compiler_upcall(JVMCIENV, compiler, method, "call_HotSpotJVMCIRuntime_compileMethod")) {
2016 return;
2017 }
2018 compiler->on_upcall(nullptr);
2019 guarantee(result_object.is_non_null(), "call_HotSpotJVMCIRuntime_compileMethod returned null");
2020 JVMCIObject failure_message = JVMCIENV->get_HotSpotCompilationRequestResult_failureMessage(result_object);
2021 if (failure_message.is_non_null()) {
2022 // Copy failure reason into resource memory first ...
2023 const char* failure_reason = JVMCIENV->as_utf8_string(failure_message);
2024 // ... and then into the C heap.
2025 failure_reason = os::strdup(failure_reason, mtJVMCI);
2026 bool retryable = JVMCIENV->get_HotSpotCompilationRequestResult_retry(result_object) != 0;
2027 compile_state->set_failure(retryable, failure_reason, true);
2028 } else {
2029 if (!compile_state->task()->is_success()) {
2030 compile_state->set_failure(true, "no nmethod produced");
2031 } else {
2032 compile_state->task()->set_num_inlined_bytecodes(JVMCIENV->get_HotSpotCompilationRequestResult_inlinedBytecodes(result_object));
2033 compiler->inc_methods_compiled();
2034 }
2035 }
2036 if (compiler->is_bootstrapping()) {
2037 compiler->set_bootstrap_compilation_request_handled();
2038 }
2039 }
2040
2041 bool JVMCIRuntime::is_gc_supported(JVMCIEnv* JVMCIENV, CollectedHeap::Name name) {
2042 JVMCI_EXCEPTION_CONTEXT
2043
2044 JVMCIObject receiver = get_HotSpotJVMCIRuntime(JVMCIENV);
2045 if (JVMCIENV->has_pending_exception()) {
2046 fatal_exception(JVMCIENV, "Exception during HotSpotJVMCIRuntime initialization");
2047 }
2048 return JVMCIENV->call_HotSpotJVMCIRuntime_isGCSupported(receiver, (int) name);
2049 }
2050
2051 bool JVMCIRuntime::is_intrinsic_supported(JVMCIEnv* JVMCIENV, jint id) {
2052 JVMCI_EXCEPTION_CONTEXT
2053
2054 JVMCIObject receiver = get_HotSpotJVMCIRuntime(JVMCIENV);
2055 if (JVMCIENV->has_pending_exception()) {
2056 fatal_exception(JVMCIENV, "Exception during HotSpotJVMCIRuntime initialization");
2057 }
2058 return JVMCIENV->call_HotSpotJVMCIRuntime_isIntrinsicSupported(receiver, id);
2059 }
2060
2061 // ------------------------------------------------------------------
2062 JVMCI::CodeInstallResult JVMCIRuntime::register_method(JVMCIEnv* JVMCIENV,
2063 const methodHandle& method,
2064 nmethod*& nm,
2065 int entry_bci,
2066 CodeOffsets* offsets,
2067 int orig_pc_offset,
2068 CodeBuffer* code_buffer,
2069 int frame_words,
2070 OopMapSet* oop_map_set,
2071 ExceptionHandlerTable* handler_table,
2072 ImplicitExceptionTable* implicit_exception_table,
2073 AbstractCompiler* compiler,
2074 DebugInformationRecorder* debug_info,
2075 Dependencies* dependencies,
2076 int compile_id,
2077 bool has_monitors,
2078 bool has_unsafe_access,
2079 bool has_scoped_access,
2080 bool has_wide_vector,
2081 JVMCIObject compiled_code,
2082 JVMCIObject nmethod_mirror,
2083 FailedSpeculation** failed_speculations,
2084 char* speculations,
2085 int speculations_len,
2086 int nmethod_entry_patch_offset) {
2087 JVMCI_EXCEPTION_CONTEXT;
2088 CompLevel comp_level = CompLevel_full_optimization;
2089 char* failure_detail = nullptr;
2090
2091 bool install_default = JVMCIENV->get_HotSpotNmethod_isDefault(nmethod_mirror) != 0;
2092 bool profile_deopt = JVMCIENV->get_HotSpotNmethod_profileDeopt(nmethod_mirror) != 0;
2093 assert(JVMCIENV->isa_HotSpotNmethod(nmethod_mirror), "must be");
2094 JVMCIObject name = JVMCIENV->get_InstalledCode_name(nmethod_mirror);
2095 const char* nmethod_mirror_name = name.is_null() ? nullptr : JVMCIENV->as_utf8_string(name);
2096 int nmethod_mirror_index;
2097 if (!install_default) {
2098 // Reserve or initialize mirror slot in the oops table.
2099 OopRecorder* oop_recorder = debug_info->oop_recorder();
2100 nmethod_mirror_index = oop_recorder->allocate_oop_index(nmethod_mirror.is_hotspot() ? nmethod_mirror.as_jobject() : nullptr);
2101 } else {
2102 // A default HotSpotNmethod mirror is never tracked by the nmethod
2103 nmethod_mirror_index = -1;
2104 }
2105
2106 JVMCI::CodeInstallResult result(JVMCI::ok);
2107
2108 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
2109 if (method->get_method_counters(THREAD) == nullptr) {
2110 result = JVMCI::cache_full;
2111 failure_detail = (char*) "can't create method counters";
2112 }
2113
2114 if (result == JVMCI::ok) {
2115 // Check if memory should be freed before allocation
2116 CodeCache::gc_on_allocation();
2117
2118 // To prevent compile queue updates.
2119 MutexLocker locker(THREAD, MethodCompileQueue_lock);
2120
2121 // Prevent InstanceKlass::add_to_hierarchy from running
2122 // and invalidating our dependencies until we install this method.
2123 MutexLocker ml(Compile_lock);
2124
2125 // Encode the dependencies now, so we can check them right away.
2126 dependencies->encode_content_bytes();
2127
2128 // Record the dependencies for the current compile in the log
2129 if (LogCompilation) {
2130 for (Dependencies::DepStream deps(dependencies); deps.next(); ) {
2131 deps.log_dependency();
2132 }
2133 }
2134
2135 // Check for {class loads, evolution, breakpoints} during compilation
2136 JVMCICompileState* compile_state = JVMCIENV->compile_state();
2137 bool failing_dep_is_call_site;
2138 result = validate_compile_task_dependencies(dependencies, compile_state, &failure_detail, failing_dep_is_call_site);
2139 if (install_default && result != JVMCI::ok) {
2140 // While not a true deoptimization, it is a preemptive decompile.
2141 MethodData* mdp = method()->method_data();
2142 if (mdp != nullptr && !failing_dep_is_call_site) {
2143 mdp->inc_decompile_count();
2144 #ifdef ASSERT
2145 if (mdp->decompile_count() > (uint)PerMethodRecompilationCutoff) {
2146 ResourceMark m;
2147 tty->print_cr("WARN: endless recompilation of %s. Method was set to not compilable.", method()->name_and_sig_as_C_string());
2148 }
2149 #endif
2150 }
2151
2152 // All buffers in the CodeBuffer are allocated in the CodeCache.
2153 // If the code buffer is created on each compile attempt
2154 // as in C2, then it must be freed.
2155 //code_buffer->free_blob();
2156 } else {
2157 JVMCINMethodData* data = JVMCINMethodData::create(nmethod_mirror_index,
2158 nmethod_entry_patch_offset,
2159 nmethod_mirror_name,
2160 install_default,
2161 profile_deopt,
2162 failed_speculations);
2163 nm = nmethod::new_nmethod(method,
2164 compile_id,
2165 entry_bci,
2166 offsets,
2167 orig_pc_offset,
2168 debug_info, dependencies, code_buffer,
2169 frame_words, oop_map_set,
2170 handler_table, implicit_exception_table,
2171 compiler, comp_level,
2172 speculations, speculations_len, data);
2173
2174
2175 // Free codeBlobs
2176 if (nm == nullptr) {
2177 // The CodeCache is full. Print out warning and disable compilation.
2178 {
2179 MutexUnlocker ml(Compile_lock);
2180 MutexUnlocker locker(MethodCompileQueue_lock);
2181 CompileBroker::handle_full_code_cache(CodeCache::get_code_blob_type(comp_level));
2182 }
2183 result = JVMCI::cache_full;
2184 } else {
2185 nm->set_has_unsafe_access(has_unsafe_access);
2186 nm->set_has_wide_vectors(has_wide_vector);
2187 nm->set_has_monitors(has_monitors);
2188 nm->set_has_scoped_access(has_scoped_access);
2189
2190 JVMCINMethodData* data = nm->jvmci_nmethod_data();
2191 assert(data != nullptr, "must be");
2192 if (install_default) {
2193 assert(!nmethod_mirror.is_hotspot() || data->get_nmethod_mirror(nm) == nullptr, "must be");
2194 if (entry_bci == InvocationEntryBci) {
2195 // If there is an old version we're done with it
2196 nmethod* old = method->code();
2197 if (TraceMethodReplacement && old != nullptr) {
2198 ResourceMark rm;
2199 char *method_name = method->name_and_sig_as_C_string();
2200 tty->print_cr("Replacing method %s", method_name);
2201 }
2202 if (old != nullptr) {
2203 old->make_not_entrant(nmethod::InvalidationReason::JVMCI_REPLACED_WITH_NEW_CODE);
2204 }
2205
2206 LogTarget(Info, nmethod, install) lt;
2207 if (lt.is_enabled()) {
2208 ResourceMark rm;
2209 char *method_name = method->name_and_sig_as_C_string();
2210 lt.print("Installing method (%d) %s [entry point: %p]",
2211 comp_level, method_name, nm->entry_point());
2212 }
2213 // Allow the code to be executed
2214 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
2215 if (nm->make_in_use()) {
2216 method->set_code(method, nm);
2217 } else {
2218 result = JVMCI::nmethod_reclaimed;
2219 }
2220 } else {
2221 LogTarget(Info, nmethod, install) lt;
2222 if (lt.is_enabled()) {
2223 ResourceMark rm;
2224 char *method_name = method->name_and_sig_as_C_string();
2225 lt.print("Installing osr method (%d) %s @ %d",
2226 comp_level, method_name, entry_bci);
2227 }
2228 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
2229 if (nm->make_in_use()) {
2230 InstanceKlass::cast(method->method_holder())->add_osr_nmethod(nm);
2231 } else {
2232 result = JVMCI::nmethod_reclaimed;
2233 }
2234 }
2235 } else {
2236 assert(!nmethod_mirror.is_hotspot() || data->get_nmethod_mirror(nm) == HotSpotJVMCI::resolve(nmethod_mirror), "must be");
2237 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
2238 if (!nm->make_in_use()) {
2239 result = JVMCI::nmethod_reclaimed;
2240 }
2241 }
2242 }
2243 }
2244 }
2245
2246 // String creation must be done outside lock
2247 if (failure_detail != nullptr) {
2248 // A failure to allocate the string is silently ignored.
2249 JVMCIObject message = JVMCIENV->create_string(failure_detail, JVMCIENV);
2250 JVMCIENV->set_HotSpotCompiledNmethod_installationFailureMessage(compiled_code, message);
2251 }
2252
2253 if (result == JVMCI::ok) {
2254 JVMCICompileState* state = JVMCIENV->compile_state();
2255 if (state != nullptr) {
2256 // Compilation succeeded, post what we know about it
2257 nm->post_compiled_method(state->task());
2258 }
2259 }
2260
2261 return result;
2262 }
2263
2264 void JVMCIRuntime::post_compile(JavaThread* thread) {
2265 if (UseJVMCINativeLibrary && JVMCI::one_shared_library_javavm_per_compilation()) {
2266 if (thread->libjvmci_runtime() != nullptr) {
2267 detach_thread(thread, "single use JavaVM");
2268 } else {
2269 // JVMCI shutdown may have already detached the thread
2270 }
2271 }
2272 }