1 /*
2 * Copyright (c) 2012, 2019, 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 "precompiled.hpp"
25 #include "classfile/symbolTable.hpp"
26 #include "compiler/compileBroker.hpp"
27 #include "jvmci/jniAccessMark.inline.hpp"
28 #include "jvmci/jvmciCompilerToVM.hpp"
29 #include "jvmci/jvmciRuntime.hpp"
30 #include "logging/log.hpp"
31 #include "memory/oopFactory.hpp"
32 #include "memory/universe.hpp"
33 #include "oops/constantPool.inline.hpp"
34 #include "oops/method.inline.hpp"
35 #include "oops/objArrayKlass.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "runtime/biasedLocking.hpp"
38 #include "runtime/deoptimization.hpp"
39 #include "runtime/fieldDescriptor.inline.hpp"
40 #include "runtime/frame.inline.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #if INCLUDE_G1GC
43 #include "gc/g1/g1ThreadLocalData.hpp"
44 #endif // INCLUDE_G1GC
45
46 // Simple helper to see if the caller of a runtime stub which
47 // entered the VM has been deoptimized
48
49 static bool caller_is_deopted() {
50 JavaThread* thread = JavaThread::current();
51 RegisterMap reg_map(thread, false);
52 frame runtime_frame = thread->last_frame();
53 frame caller_frame = runtime_frame.sender(®_map);
54 assert(caller_frame.is_compiled_frame(), "must be compiled");
55 return caller_frame.is_deoptimized_frame();
56 }
57
58 // Stress deoptimization
59 static void deopt_caller() {
60 if ( !caller_is_deopted()) {
61 JavaThread* thread = JavaThread::current();
62 RegisterMap reg_map(thread, false);
63 frame runtime_frame = thread->last_frame();
64 frame caller_frame = runtime_frame.sender(®_map);
65 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
66 assert(caller_is_deopted(), "Must be deoptimized");
67 }
68 }
69
70 // Manages a scope for a JVMCI runtime call that attempts a heap allocation.
71 // If there is a pending exception upon closing the scope and the runtime
72 // call is of the variety where allocation failure returns NULL without an
73 // exception, the following action is taken:
74 // 1. The pending exception is cleared
75 // 2. NULL is written to JavaThread::_vm_result
76 // 3. Checks that an OutOfMemoryError is Universe::out_of_memory_error_retry().
77 class RetryableAllocationMark: public StackObj {
78 private:
79 JavaThread* _thread;
80 public:
81 RetryableAllocationMark(JavaThread* thread, bool activate) {
82 if (activate) {
83 assert(!thread->in_retryable_allocation(), "retryable allocation scope is non-reentrant");
84 _thread = thread;
85 _thread->set_in_retryable_allocation(true);
86 } else {
87 _thread = NULL;
88 }
89 }
90 ~RetryableAllocationMark() {
91 if (_thread != NULL) {
92 _thread->set_in_retryable_allocation(false);
93 JavaThread* THREAD = _thread;
94 if (HAS_PENDING_EXCEPTION) {
95 oop ex = PENDING_EXCEPTION;
96 CLEAR_PENDING_EXCEPTION;
97 oop retry_oome = Universe::out_of_memory_error_retry();
98 if (ex->is_a(retry_oome->klass()) && retry_oome != ex) {
99 ResourceMark rm;
100 fatal("Unexpected exception in scope of retryable allocation: " INTPTR_FORMAT " of type %s", p2i(ex), ex->klass()->external_name());
101 }
102 _thread->set_vm_result(NULL);
103 }
104 }
105 }
106 };
107
108 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance_common(JavaThread* thread, Klass* klass, bool null_on_fail))
109 JRT_BLOCK;
110 assert(klass->is_klass(), "not a class");
111 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
112 InstanceKlass* h = InstanceKlass::cast(klass);
113 {
114 RetryableAllocationMark ram(thread, null_on_fail);
115 h->check_valid_for_instantiation(true, CHECK);
116 oop obj;
117 if (null_on_fail) {
118 if (!h->is_initialized()) {
119 // Cannot re-execute class initialization without side effects
120 // so return without attempting the initialization
121 return;
122 }
123 } else {
124 // make sure klass is initialized
125 h->initialize(CHECK);
126 }
127 // allocate instance and return via TLS
128 obj = h->allocate_instance(CHECK);
129 thread->set_vm_result(obj);
130 }
131 JRT_BLOCK_END;
132 SharedRuntime::on_slowpath_allocation_exit(thread);
133 JRT_END
134
135 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array_common(JavaThread* thread, Klass* array_klass, jint length, bool null_on_fail))
136 JRT_BLOCK;
137 // Note: no handle for klass needed since they are not used
138 // anymore after new_objArray() and no GC can happen before.
139 // (This may have to change if this code changes!)
140 assert(array_klass->is_klass(), "not a class");
141 oop obj;
142 if (array_klass->is_typeArray_klass()) {
143 BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
144 RetryableAllocationMark ram(thread, null_on_fail);
145 obj = oopFactory::new_typeArray(elt_type, length, CHECK);
146 } else {
147 Handle holder(THREAD, array_klass->klass_holder()); // keep the klass alive
148 Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
149 RetryableAllocationMark ram(thread, null_on_fail);
150 obj = oopFactory::new_objArray(elem_klass, length, CHECK);
151 }
152 thread->set_vm_result(obj);
153 // This is pretty rare but this runtime patch is stressful to deoptimization
154 // if we deoptimize here so force a deopt to stress the path.
155 if (DeoptimizeALot) {
156 static int deopts = 0;
157 // Alternate between deoptimizing and raising an error (which will also cause a deopt)
158 if (deopts++ % 2 == 0) {
159 if (null_on_fail) {
160 return;
161 } else {
162 ResourceMark rm(THREAD);
163 THROW(vmSymbols::java_lang_OutOfMemoryError());
164 }
165 } else {
166 deopt_caller();
167 }
168 }
169 JRT_BLOCK_END;
170 SharedRuntime::on_slowpath_allocation_exit(thread);
171 JRT_END
172
173 JRT_ENTRY(void, JVMCIRuntime::new_multi_array_common(JavaThread* thread, Klass* klass, int rank, jint* dims, bool null_on_fail))
174 assert(klass->is_klass(), "not a class");
175 assert(rank >= 1, "rank must be nonzero");
176 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
177 RetryableAllocationMark ram(thread, null_on_fail);
178 oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
179 thread->set_vm_result(obj);
180 JRT_END
181
182 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array_common(JavaThread* thread, oopDesc* element_mirror, jint length, bool null_on_fail))
183 RetryableAllocationMark ram(thread, null_on_fail);
184 oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
185 thread->set_vm_result(obj);
186 JRT_END
187
188 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance_common(JavaThread* thread, oopDesc* type_mirror, bool null_on_fail))
189 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(type_mirror));
190
191 if (klass == NULL) {
192 ResourceMark rm(THREAD);
193 THROW(vmSymbols::java_lang_InstantiationException());
194 }
195 RetryableAllocationMark ram(thread, null_on_fail);
196
197 // Create new instance (the receiver)
198 klass->check_valid_for_instantiation(false, CHECK);
199
200 if (null_on_fail) {
201 if (!klass->is_initialized()) {
202 // Cannot re-execute class initialization without side effects
203 // so return without attempting the initialization
204 return;
205 }
206 } else {
207 // Make sure klass gets initialized
208 klass->initialize(CHECK);
209 }
210
211 oop obj = klass->allocate_instance(CHECK);
212 thread->set_vm_result(obj);
213 JRT_END
214
215 extern void vm_exit(int code);
216
217 // Enter this method from compiled code handler below. This is where we transition
218 // to VM mode. This is done as a helper routine so that the method called directly
219 // from compiled code does not have to transition to VM. This allows the entry
220 // method to see if the nmethod that we have just looked up a handler for has
221 // been deoptimized while we were in the vm. This simplifies the assembly code
222 // cpu directories.
223 //
224 // We are entering here from exception stub (via the entry method below)
225 // If there is a compiled exception handler in this method, we will continue there;
226 // otherwise we will unwind the stack and continue at the caller of top frame method
227 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
228 // control the area where we can allow a safepoint. After we exit the safepoint area we can
229 // check to see if the handler we are going to return is now in a nmethod that has
230 // been deoptimized. If that is the case we return the deopt blob
231 // unpack_with_exception entry instead. This makes life for the exception blob easier
232 // because making that same check and diverting is painful from assembly language.
233 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, CompiledMethod*& cm))
234 // Reset method handle flag.
235 thread->set_is_method_handle_return(false);
236
237 Handle exception(thread, ex);
238 cm = CodeCache::find_compiled(pc);
239 assert(cm != NULL, "this is not a compiled method");
240 // Adjust the pc as needed/
241 if (cm->is_deopt_pc(pc)) {
242 RegisterMap map(thread, false);
243 frame exception_frame = thread->last_frame().sender(&map);
244 // if the frame isn't deopted then pc must not correspond to the caller of last_frame
245 assert(exception_frame.is_deoptimized_frame(), "must be deopted");
246 pc = exception_frame.pc();
247 }
248 #ifdef ASSERT
249 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
250 assert(oopDesc::is_oop(exception()), "just checking");
251 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
252 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
253 if (ExitVMOnVerifyError) vm_exit(-1);
254 ShouldNotReachHere();
255 }
256 #endif
257
258 // Check the stack guard pages and reenable them if necessary and there is
259 // enough space on the stack to do so. Use fast exceptions only if the guard
260 // pages are enabled.
261 bool guard_pages_enabled = thread->stack_guards_enabled();
262 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
263
264 if (JvmtiExport::can_post_on_exceptions()) {
265 // To ensure correct notification of exception catches and throws
266 // we have to deoptimize here. If we attempted to notify the
267 // catches and throws during this exception lookup it's possible
268 // we could deoptimize on the way out of the VM and end back in
269 // the interpreter at the throw site. This would result in double
270 // notifications since the interpreter would also notify about
271 // these same catches and throws as it unwound the frame.
272
273 RegisterMap reg_map(thread);
274 frame stub_frame = thread->last_frame();
275 frame caller_frame = stub_frame.sender(®_map);
276
277 // We don't really want to deoptimize the nmethod itself since we
278 // can actually continue in the exception handler ourselves but I
279 // don't see an easy way to have the desired effect.
280 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
281 assert(caller_is_deopted(), "Must be deoptimized");
282
283 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
284 }
285
286 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
287 if (guard_pages_enabled) {
288 address fast_continuation = cm->handler_for_exception_and_pc(exception, pc);
289 if (fast_continuation != NULL) {
290 // Set flag if return address is a method handle call site.
291 thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
292 return fast_continuation;
293 }
294 }
295
296 // If the stack guard pages are enabled, check whether there is a handler in
297 // the current method. Otherwise (guard pages disabled), force an unwind and
298 // skip the exception cache update (i.e., just leave continuation==NULL).
299 address continuation = NULL;
300 if (guard_pages_enabled) {
301
302 // New exception handling mechanism can support inlined methods
303 // with exception handlers since the mappings are from PC to PC
304
305 // debugging support
306 // tracing
307 if (log_is_enabled(Info, exceptions)) {
308 ResourceMark rm;
309 stringStream tempst;
310 assert(cm->method() != NULL, "Unexpected null method()");
311 tempst.print("compiled method <%s>\n"
312 " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT,
313 cm->method()->print_value_string(), p2i(pc), p2i(thread));
314 Exceptions::log_exception(exception, tempst.as_string());
315 }
316 // for AbortVMOnException flag
317 NOT_PRODUCT(Exceptions::debug_check_abort(exception));
318
319 // Clear out the exception oop and pc since looking up an
320 // exception handler can cause class loading, which might throw an
321 // exception and those fields are expected to be clear during
322 // normal bytecode execution.
323 thread->clear_exception_oop_and_pc();
324
325 bool recursive_exception = false;
326 continuation = SharedRuntime::compute_compiled_exc_handler(cm, pc, exception, false, false, recursive_exception);
327 // If an exception was thrown during exception dispatch, the exception oop may have changed
328 thread->set_exception_oop(exception());
329 thread->set_exception_pc(pc);
330
331 // The exception cache is used only for non-implicit exceptions
332 // Update the exception cache only when another exception did
333 // occur during the computation of the compiled exception handler
334 // (e.g., when loading the class of the catch type).
335 // Checking for exception oop equality is not
336 // sufficient because some exceptions are pre-allocated and reused.
337 if (continuation != NULL && !recursive_exception && !SharedRuntime::deopt_blob()->contains(continuation)) {
338 cm->add_handler_for_exception_and_pc(exception, pc, continuation);
339 }
340 }
341
342 // Set flag if return address is a method handle call site.
343 thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
344
345 if (log_is_enabled(Info, exceptions)) {
346 ResourceMark rm;
347 log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
348 " for exception thrown at PC " PTR_FORMAT,
349 p2i(thread), p2i(continuation), p2i(pc));
350 }
351
352 return continuation;
353 JRT_END
354
355 // Enter this method from compiled code only if there is a Java exception handler
356 // in the method handling the exception.
357 // We are entering here from exception stub. We don't do a normal VM transition here.
358 // We do it in a helper. This is so we can check to see if the nmethod we have just
359 // searched for an exception handler has been deoptimized in the meantime.
360 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
361 oop exception = thread->exception_oop();
362 address pc = thread->exception_pc();
363 // Still in Java mode
364 DEBUG_ONLY(ResetNoHandleMark rnhm);
365 CompiledMethod* cm = NULL;
366 address continuation = NULL;
367 {
368 // Enter VM mode by calling the helper
369 ResetNoHandleMark rnhm;
370 continuation = exception_handler_for_pc_helper(thread, exception, pc, cm);
371 }
372 // Back in JAVA, use no oops DON'T safepoint
373
374 // Now check to see if the compiled method we were called from is now deoptimized.
375 // If so we must return to the deopt blob and deoptimize the nmethod
376 if (cm != NULL && caller_is_deopted()) {
377 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
378 }
379
380 assert(continuation != NULL, "no handler found");
381 return continuation;
382 }
383
384 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
385 IF_TRACE_jvmci_3 {
386 char type[O_BUFLEN];
387 obj->klass()->name()->as_C_string(type, O_BUFLEN);
388 markWord mark = obj->mark();
389 TRACE_jvmci_3("%s: entered locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), p2i(obj), type, mark.value(), p2i(lock));
390 tty->flush();
391 }
392 if (PrintBiasedLockingStatistics) {
393 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
394 }
395 Handle h_obj(thread, obj);
396 assert(oopDesc::is_oop(h_obj()), "must be NULL or an object");
397 ObjectSynchronizer::enter(h_obj, lock, THREAD);
398 TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));
399 JRT_END
400
401 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))
402 assert(thread == JavaThread::current(), "threads must correspond");
403 assert(thread->last_Java_sp(), "last_Java_sp must be set");
404 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
405 EXCEPTION_MARK;
406
407 #ifdef ASSERT
408 if (!oopDesc::is_oop(obj)) {
409 ResetNoHandleMark rhm;
410 nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();
411 if (method != NULL) {
412 tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));
413 }
414 thread->print_stack_on(tty);
415 assert(false, "invalid lock object pointer dected");
416 }
417 #endif
418
419 ObjectSynchronizer::exit(obj, lock, THREAD);
420 IF_TRACE_jvmci_3 {
421 char type[O_BUFLEN];
422 obj->klass()->name()->as_C_string(type, O_BUFLEN);
423 TRACE_jvmci_3("%s: exited locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), p2i(obj), type, obj->mark().value(), p2i(lock));
424 tty->flush();
425 }
426 JRT_END
427
428 // Object.notify() fast path, caller does slow path
429 JRT_LEAF(jboolean, JVMCIRuntime::object_notify(JavaThread *thread, oopDesc* obj))
430
431 // Very few notify/notifyAll operations find any threads on the waitset, so
432 // the dominant fast-path is to simply return.
433 // Relatedly, it's critical that notify/notifyAll be fast in order to
434 // reduce lock hold times.
435 if (!SafepointSynchronize::is_synchronizing()) {
436 if (ObjectSynchronizer::quick_notify(obj, thread, false)) {
437 return true;
438 }
439 }
440 return false; // caller must perform slow path
441
442 JRT_END
443
444 // Object.notifyAll() fast path, caller does slow path
445 JRT_LEAF(jboolean, JVMCIRuntime::object_notifyAll(JavaThread *thread, oopDesc* obj))
446
447 if (!SafepointSynchronize::is_synchronizing() ) {
448 if (ObjectSynchronizer::quick_notify(obj, thread, true)) {
449 return true;
450 }
451 }
452 return false; // caller must perform slow path
453
454 JRT_END
455
456 JRT_ENTRY(void, JVMCIRuntime::throw_and_post_jvmti_exception(JavaThread* thread, const char* exception, const char* message))
457 TempNewSymbol symbol = SymbolTable::new_symbol(exception);
458 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
459 JRT_END
460
461 JRT_ENTRY(void, JVMCIRuntime::throw_klass_external_name_exception(JavaThread* thread, const char* exception, Klass* klass))
462 ResourceMark rm(thread);
463 TempNewSymbol symbol = SymbolTable::new_symbol(exception);
464 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, klass->external_name());
465 JRT_END
466
467 JRT_ENTRY(void, JVMCIRuntime::throw_class_cast_exception(JavaThread* thread, const char* exception, Klass* caster_klass, Klass* target_klass))
468 ResourceMark rm(thread);
469 const char* message = SharedRuntime::generate_class_cast_message(caster_klass, target_klass);
470 TempNewSymbol symbol = SymbolTable::new_symbol(exception);
471 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
472 JRT_END
473
474 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
475 ttyLocker ttyl;
476
477 if (obj == NULL) {
478 tty->print("NULL");
479 } else if (oopDesc::is_oop_or_null(obj, true) && (!as_string || !java_lang_String::is_instance(obj))) {
480 if (oopDesc::is_oop_or_null(obj, true)) {
481 char buf[O_BUFLEN];
482 tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
483 } else {
484 tty->print(INTPTR_FORMAT, p2i(obj));
485 }
486 } else {
487 ResourceMark rm;
488 assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
489 char *buf = java_lang_String::as_utf8_string(obj);
490 tty->print_raw(buf);
491 }
492 if (newline) {
493 tty->cr();
494 }
495 JRT_END
496
497 #if INCLUDE_G1GC
498
499 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
500 G1ThreadLocalData::satb_mark_queue(thread).enqueue(obj);
501 JRT_END
502
503 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
504 G1ThreadLocalData::dirty_card_queue(thread).enqueue(card_addr);
505 JRT_END
506
507 #endif // INCLUDE_G1GC
508
509 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
510 bool ret = true;
511 if(!Universe::heap()->is_in(parent)) {
512 tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
513 parent->print();
514 ret=false;
515 }
516 if(!Universe::heap()->is_in(child)) {
517 tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
518 child->print();
519 ret=false;
520 }
521 return (jint)ret;
522 JRT_END
523
524 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
525 ResourceMark rm;
526 const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
527 char *detail_msg = NULL;
528 if (format != 0L) {
529 const char* buf = (char*) (address) format;
530 size_t detail_msg_length = strlen(buf) * 2;
531 detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
532 jio_snprintf(detail_msg, detail_msg_length, buf, value);
533 }
534 report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
535 JRT_END
536
537 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
538 oop exception = thread->exception_oop();
539 assert(exception != NULL, "npe");
540 thread->set_exception_oop(NULL);
541 thread->set_exception_pc(0);
542 return exception;
543 JRT_END
544
545 PRAGMA_DIAG_PUSH
546 PRAGMA_FORMAT_NONLITERAL_IGNORED
547 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, const char* format, jlong v1, jlong v2, jlong v3))
548 ResourceMark rm;
549 tty->print(format, v1, v2, v3);
550 JRT_END
551 PRAGMA_DIAG_POP
552
553 static void decipher(jlong v, bool ignoreZero) {
554 if (v != 0 || !ignoreZero) {
555 void* p = (void *)(address) v;
556 CodeBlob* cb = CodeCache::find_blob(p);
557 if (cb) {
558 if (cb->is_nmethod()) {
559 char buf[O_BUFLEN];
560 tty->print("%s [" INTPTR_FORMAT "+" JLONG_FORMAT "]", cb->as_nmethod_or_null()->method()->name_and_sig_as_C_string(buf, O_BUFLEN), p2i(cb->code_begin()), (jlong)((address)v - cb->code_begin()));
561 return;
562 }
563 cb->print_value_on(tty);
564 return;
565 }
566 if (Universe::heap()->is_in(p)) {
567 oop obj = oop(p);
568 obj->print_value_on(tty);
569 return;
570 }
571 tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
572 }
573 }
574
575 PRAGMA_DIAG_PUSH
576 PRAGMA_FORMAT_NONLITERAL_IGNORED
577 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
578 ResourceMark rm;
579 const char *buf = (const char*) (address) format;
580 if (vmError) {
581 if (buf != NULL) {
582 fatal(buf, v1, v2, v3);
583 } else {
584 fatal("<anonymous error>");
585 }
586 } else if (buf != NULL) {
587 tty->print(buf, v1, v2, v3);
588 } else {
589 assert(v2 == 0, "v2 != 0");
590 assert(v3 == 0, "v3 != 0");
591 decipher(v1, false);
592 }
593 JRT_END
594 PRAGMA_DIAG_POP
595
596 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
597 union {
598 jlong l;
599 jdouble d;
600 jfloat f;
601 } uu;
602 uu.l = value;
603 switch (typeChar) {
604 case 'Z': tty->print(value == 0 ? "false" : "true"); break;
605 case 'B': tty->print("%d", (jbyte) value); break;
606 case 'C': tty->print("%c", (jchar) value); break;
607 case 'S': tty->print("%d", (jshort) value); break;
608 case 'I': tty->print("%d", (jint) value); break;
609 case 'F': tty->print("%f", uu.f); break;
610 case 'J': tty->print(JLONG_FORMAT, value); break;
611 case 'D': tty->print("%lf", uu.d); break;
612 default: assert(false, "unknown typeChar"); break;
613 }
614 if (newline) {
615 tty->cr();
616 }
617 JRT_END
618
619 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
620 return (jint) obj->identity_hash();
621 JRT_END
622
623 JRT_ENTRY(jint, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
624 deopt_caller();
625 return (jint) value;
626 JRT_END
627
628
629 // private static JVMCIRuntime JVMCI.initializeRuntime()
630 JVM_ENTRY_NO_ENV(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
631 JNI_JVMCIENV(thread, env);
632 if (!EnableJVMCI) {
633 JVMCI_THROW_MSG_NULL(InternalError, "JVMCI is not enabled");
634 }
635 JVMCIENV->runtime()->initialize_HotSpotJVMCIRuntime(JVMCI_CHECK_NULL);
636 JVMCIObject runtime = JVMCIENV->runtime()->get_HotSpotJVMCIRuntime(JVMCI_CHECK_NULL);
637 return JVMCIENV->get_jobject(runtime);
638 JVM_END
639
640 void JVMCIRuntime::call_getCompiler(TRAPS) {
641 THREAD_JVMCIENV(JavaThread::current());
642 JVMCIObject jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(JVMCI_CHECK);
643 initialize(JVMCIENV);
644 JVMCIENV->call_HotSpotJVMCIRuntime_getCompiler(jvmciRuntime, JVMCI_CHECK);
645 }
646
647 void JVMCINMethodData::initialize(
648 int nmethod_mirror_index,
649 const char* name,
650 FailedSpeculation** failed_speculations)
651 {
652 _failed_speculations = failed_speculations;
653 _nmethod_mirror_index = nmethod_mirror_index;
654 if (name != NULL) {
655 _has_name = true;
656 char* dest = (char*) this->name();
657 strcpy(dest, name);
658 } else {
659 _has_name = false;
660 }
661 }
662
663 void JVMCINMethodData::add_failed_speculation(nmethod* nm, jlong speculation) {
664 uint index = (speculation >> 32) & 0xFFFFFFFF;
665 int length = (int) speculation;
666 if (index + length > (uint) nm->speculations_size()) {
667 fatal(INTPTR_FORMAT "[index: %d, length: %d] out of bounds wrt encoded speculations of length %u", speculation, index, length, nm->speculations_size());
668 }
669 address data = nm->speculations_begin() + index;
670 FailedSpeculation::add_failed_speculation(nm, _failed_speculations, data, length);
671 }
672
673 oop JVMCINMethodData::get_nmethod_mirror(nmethod* nm, bool phantom_ref) {
674 if (_nmethod_mirror_index == -1) {
675 return NULL;
676 }
677 if (phantom_ref) {
678 return nm->oop_at_phantom(_nmethod_mirror_index);
679 } else {
680 return nm->oop_at(_nmethod_mirror_index);
681 }
682 }
683
684 void JVMCINMethodData::set_nmethod_mirror(nmethod* nm, oop new_mirror) {
685 assert(_nmethod_mirror_index != -1, "cannot set JVMCI mirror for nmethod");
686 oop* addr = nm->oop_addr_at(_nmethod_mirror_index);
687 assert(new_mirror != NULL, "use clear_nmethod_mirror to clear the mirror");
688 assert(*addr == NULL, "cannot overwrite non-null mirror");
689
690 *addr = new_mirror;
691
692 // Since we've patched some oops in the nmethod,
693 // (re)register it with the heap.
694 Universe::heap()->register_nmethod(nm);
695 }
696
697 void JVMCINMethodData::clear_nmethod_mirror(nmethod* nm) {
698 if (_nmethod_mirror_index != -1) {
699 oop* addr = nm->oop_addr_at(_nmethod_mirror_index);
700 *addr = NULL;
701 }
702 }
703
704 void JVMCINMethodData::invalidate_nmethod_mirror(nmethod* nm) {
705 oop nmethod_mirror = get_nmethod_mirror(nm, /* phantom_ref */ true);
706 if (nmethod_mirror == NULL) {
707 return;
708 }
709
710 // Update the values in the mirror if it still refers to nm.
711 // We cannot use JVMCIObject to wrap the mirror as this is called
712 // during GC, forbidding the creation of JNIHandles.
713 JVMCIEnv* jvmciEnv = NULL;
714 nmethod* current = (nmethod*) HotSpotJVMCI::InstalledCode::address(jvmciEnv, nmethod_mirror);
715 if (nm == current) {
716 if (!nm->is_alive()) {
717 // Break the link from the mirror to nm such that
718 // future invocations via the mirror will result in
719 // an InvalidInstalledCodeException.
720 HotSpotJVMCI::InstalledCode::set_address(jvmciEnv, nmethod_mirror, 0);
721 HotSpotJVMCI::InstalledCode::set_entryPoint(jvmciEnv, nmethod_mirror, 0);
722 } else if (nm->is_not_entrant()) {
723 // Zero the entry point so any new invocation will fail but keep
724 // the address link around that so that existing activations can
725 // be deoptimized via the mirror (i.e. JVMCIEnv::invalidate_installed_code).
726 HotSpotJVMCI::InstalledCode::set_entryPoint(jvmciEnv, nmethod_mirror, 0);
727 }
728 }
729 }
730
731 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(JVMCI_TRAPS) {
732 if (is_HotSpotJVMCIRuntime_initialized()) {
733 if (JVMCIENV->is_hotspot() && UseJVMCINativeLibrary) {
734 JVMCI_THROW_MSG(InternalError, "JVMCI has already been enabled in the JVMCI shared library");
735 }
736 }
737
738 initialize(JVMCIENV);
739
740 // This should only be called in the context of the JVMCI class being initialized
741 JVMCIObject result = JVMCIENV->call_HotSpotJVMCIRuntime_runtime(JVMCI_CHECK);
742
743 _HotSpotJVMCIRuntime_instance = JVMCIENV->make_global(result);
744 }
745
746 void JVMCIRuntime::initialize(JVMCIEnv* JVMCIENV) {
747 assert(this != NULL, "sanity");
748 // Check first without JVMCI_lock
749 if (_initialized) {
750 return;
751 }
752
753 MutexLocker locker(JVMCI_lock);
754 // Check again under JVMCI_lock
755 if (_initialized) {
756 return;
757 }
758
759 while (_being_initialized) {
760 JVMCI_lock->wait();
761 if (_initialized) {
762 return;
763 }
764 }
765
766 _being_initialized = true;
767
768 {
769 MutexUnlocker unlock(JVMCI_lock);
770
771 HandleMark hm;
772 ResourceMark rm;
773 JavaThread* THREAD = JavaThread::current();
774 if (JVMCIENV->is_hotspot()) {
775 HotSpotJVMCI::compute_offsets(CHECK_EXIT);
776 } else {
777 JNIAccessMark jni(JVMCIENV);
778
779 JNIJVMCI::initialize_ids(jni.env());
780 if (jni()->ExceptionCheck()) {
781 jni()->ExceptionDescribe();
782 fatal("JNI exception during init");
783 }
784 }
785 create_jvmci_primitive_type(T_BOOLEAN, JVMCI_CHECK_EXIT_((void)0));
786 create_jvmci_primitive_type(T_BYTE, JVMCI_CHECK_EXIT_((void)0));
787 create_jvmci_primitive_type(T_CHAR, JVMCI_CHECK_EXIT_((void)0));
788 create_jvmci_primitive_type(T_SHORT, JVMCI_CHECK_EXIT_((void)0));
789 create_jvmci_primitive_type(T_INT, JVMCI_CHECK_EXIT_((void)0));
790 create_jvmci_primitive_type(T_LONG, JVMCI_CHECK_EXIT_((void)0));
791 create_jvmci_primitive_type(T_FLOAT, JVMCI_CHECK_EXIT_((void)0));
792 create_jvmci_primitive_type(T_DOUBLE, JVMCI_CHECK_EXIT_((void)0));
793 create_jvmci_primitive_type(T_VOID, JVMCI_CHECK_EXIT_((void)0));
794
795 if (!JVMCIENV->is_hotspot()) {
796 JVMCIENV->copy_saved_properties();
797 }
798 }
799
800 _initialized = true;
801 _being_initialized = false;
802 JVMCI_lock->notify_all();
803 }
804
805 JVMCIObject JVMCIRuntime::create_jvmci_primitive_type(BasicType type, JVMCI_TRAPS) {
806 Thread* THREAD = Thread::current();
807 // These primitive types are long lived and are created before the runtime is fully set up
808 // so skip registering them for scanning.
809 JVMCIObject mirror = JVMCIENV->get_object_constant(java_lang_Class::primitive_mirror(type), false, true);
810 if (JVMCIENV->is_hotspot()) {
811 JavaValue result(T_OBJECT);
812 JavaCallArguments args;
813 args.push_oop(Handle(THREAD, HotSpotJVMCI::resolve(mirror)));
814 args.push_int(type2char(type));
815 JavaCalls::call_static(&result, HotSpotJVMCI::HotSpotResolvedPrimitiveType::klass(), vmSymbols::fromMetaspace_name(), vmSymbols::primitive_fromMetaspace_signature(), &args, CHECK_(JVMCIObject()));
816
817 return JVMCIENV->wrap(JNIHandles::make_local((oop)result.get_jobject()));
818 } else {
819 JNIAccessMark jni(JVMCIENV);
820 jobject result = jni()->CallStaticObjectMethod(JNIJVMCI::HotSpotResolvedPrimitiveType::clazz(),
821 JNIJVMCI::HotSpotResolvedPrimitiveType_fromMetaspace_method(),
822 mirror.as_jobject(), type2char(type));
823 if (jni()->ExceptionCheck()) {
824 return JVMCIObject();
825 }
826 return JVMCIENV->wrap(result);
827 }
828 }
829
830 void JVMCIRuntime::initialize_JVMCI(JVMCI_TRAPS) {
831 if (!is_HotSpotJVMCIRuntime_initialized()) {
832 initialize(JVMCI_CHECK);
833 JVMCIENV->call_JVMCI_getRuntime(JVMCI_CHECK);
834 }
835 }
836
837 JVMCIObject JVMCIRuntime::get_HotSpotJVMCIRuntime(JVMCI_TRAPS) {
838 initialize(JVMCIENV);
839 initialize_JVMCI(JVMCI_CHECK_(JVMCIObject()));
840 return _HotSpotJVMCIRuntime_instance;
841 }
842
843
844 // private void CompilerToVM.registerNatives()
845 JVM_ENTRY_NO_ENV(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
846 JNI_JVMCIENV(thread, env);
847
848 if (!EnableJVMCI) {
849 JVMCI_THROW_MSG(InternalError, "JVMCI is not enabled");
850 }
851
852 JVMCIENV->runtime()->initialize(JVMCIENV);
853
854 {
855 ResourceMark rm;
856 HandleMark hm(thread);
857 ThreadToNativeFromVM trans(thread);
858
859 // Ensure _non_oop_bits is initialized
860 Universe::non_oop_word();
861
862 if (JNI_OK != env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count())) {
863 if (!env->ExceptionCheck()) {
864 for (int i = 0; i < CompilerToVM::methods_count(); i++) {
865 if (JNI_OK != env->RegisterNatives(c2vmClass, CompilerToVM::methods + i, 1)) {
866 guarantee(false, "Error registering JNI method %s%s", CompilerToVM::methods[i].name, CompilerToVM::methods[i].signature);
867 break;
868 }
869 }
870 } else {
871 env->ExceptionDescribe();
872 }
873 guarantee(false, "Failed registering CompilerToVM native methods");
874 }
875 }
876 JVM_END
877
878
879 void JVMCIRuntime::shutdown() {
880 if (is_HotSpotJVMCIRuntime_initialized()) {
881 _shutdown_called = true;
882
883 THREAD_JVMCIENV(JavaThread::current());
884 JVMCIENV->call_HotSpotJVMCIRuntime_shutdown(_HotSpotJVMCIRuntime_instance);
885 }
886 }
887
888 void JVMCIRuntime::bootstrap_finished(TRAPS) {
889 if (is_HotSpotJVMCIRuntime_initialized()) {
890 THREAD_JVMCIENV(JavaThread::current());
891 JVMCIENV->call_HotSpotJVMCIRuntime_bootstrapFinished(_HotSpotJVMCIRuntime_instance, JVMCIENV);
892 }
893 }
894
895 void JVMCIRuntime::describe_pending_hotspot_exception(JavaThread* THREAD, bool clear) {
896 if (HAS_PENDING_EXCEPTION) {
897 Handle exception(THREAD, PENDING_EXCEPTION);
898 const char* exception_file = THREAD->exception_file();
899 int exception_line = THREAD->exception_line();
900 CLEAR_PENDING_EXCEPTION;
901 if (exception->is_a(SystemDictionary::ThreadDeath_klass())) {
902 // Don't print anything if we are being killed.
903 } else {
904 java_lang_Throwable::print_stack_trace(exception, tty);
905
906 // Clear and ignore any exceptions raised during printing
907 CLEAR_PENDING_EXCEPTION;
908 }
909 if (!clear) {
910 THREAD->set_pending_exception(exception(), exception_file, exception_line);
911 }
912 }
913 }
914
915
916 void JVMCIRuntime::exit_on_pending_exception(JVMCIEnv* JVMCIENV, const char* message) {
917 JavaThread* THREAD = JavaThread::current();
918
919 static volatile int report_error = 0;
920 if (!report_error && Atomic::cmpxchg(1, &report_error, 0) == 0) {
921 // Only report an error once
922 tty->print_raw_cr(message);
923 if (JVMCIENV != NULL) {
924 JVMCIENV->describe_pending_exception(true);
925 } else {
926 describe_pending_hotspot_exception(THREAD, true);
927 }
928 } else {
929 // Allow error reporting thread to print the stack trace.
930 THREAD->sleep(200);
931 }
932
933 before_exit(THREAD);
934 vm_exit(-1);
935 }
936
937 // ------------------------------------------------------------------
938 // Note: the logic of this method should mirror the logic of
939 // constantPoolOopDesc::verify_constant_pool_resolve.
940 bool JVMCIRuntime::check_klass_accessibility(Klass* accessing_klass, Klass* resolved_klass) {
941 if (accessing_klass->is_objArray_klass()) {
942 accessing_klass = ObjArrayKlass::cast(accessing_klass)->bottom_klass();
943 }
944 if (!accessing_klass->is_instance_klass()) {
945 return true;
946 }
947
948 if (resolved_klass->is_objArray_klass()) {
949 // Find the element klass, if this is an array.
950 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
951 }
952 if (resolved_klass->is_instance_klass()) {
953 Reflection::VerifyClassAccessResults result =
954 Reflection::verify_class_access(accessing_klass, InstanceKlass::cast(resolved_klass), true);
955 return result == Reflection::ACCESS_OK;
956 }
957 return true;
958 }
959
960 // ------------------------------------------------------------------
961 Klass* JVMCIRuntime::get_klass_by_name_impl(Klass*& accessing_klass,
962 const constantPoolHandle& cpool,
963 Symbol* sym,
964 bool require_local) {
965 JVMCI_EXCEPTION_CONTEXT;
966
967 // Now we need to check the SystemDictionary
968 if (sym->char_at(0) == 'L' &&
969 sym->char_at(sym->utf8_length()-1) == ';') {
970 // This is a name from a signature. Strip off the trimmings.
971 // Call recursive to keep scope of strippedsym.
972 TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1,
973 sym->utf8_length()-2);
974 return get_klass_by_name_impl(accessing_klass, cpool, strippedsym, require_local);
975 }
976
977 Handle loader(THREAD, (oop)NULL);
978 Handle domain(THREAD, (oop)NULL);
979 if (accessing_klass != NULL) {
980 loader = Handle(THREAD, accessing_klass->class_loader());
981 domain = Handle(THREAD, accessing_klass->protection_domain());
982 }
983
984 Klass* found_klass;
985 {
986 ttyUnlocker ttyul; // release tty lock to avoid ordering problems
987 MutexLocker ml(Compile_lock);
988 if (!require_local) {
989 found_klass = SystemDictionary::find_constrained_instance_or_array_klass(sym, loader, CHECK_NULL);
990 } else {
991 found_klass = SystemDictionary::find_instance_or_array_klass(sym, loader, domain, CHECK_NULL);
992 }
993 }
994
995 // If we fail to find an array klass, look again for its element type.
996 // The element type may be available either locally or via constraints.
997 // In either case, if we can find the element type in the system dictionary,
998 // we must build an array type around it. The CI requires array klasses
999 // to be loaded if their element klasses are loaded, except when memory
1000 // is exhausted.
1001 if (sym->char_at(0) == '[' &&
1002 (sym->char_at(1) == '[' || sym->char_at(1) == 'L')) {
1003 // We have an unloaded array.
1004 // Build it on the fly if the element class exists.
1005 TempNewSymbol elem_sym = SymbolTable::new_symbol(sym->as_utf8()+1,
1006 sym->utf8_length()-1);
1007
1008 // Get element Klass recursively.
1009 Klass* elem_klass =
1010 get_klass_by_name_impl(accessing_klass,
1011 cpool,
1012 elem_sym,
1013 require_local);
1014 if (elem_klass != NULL) {
1015 // Now make an array for it
1016 return elem_klass->array_klass(THREAD);
1017 }
1018 }
1019
1020 if (found_klass == NULL && !cpool.is_null() && cpool->has_preresolution()) {
1021 // Look inside the constant pool for pre-resolved class entries.
1022 for (int i = cpool->length() - 1; i >= 1; i--) {
1023 if (cpool->tag_at(i).is_klass()) {
1024 Klass* kls = cpool->resolved_klass_at(i);
1025 if (kls->name() == sym) {
1026 return kls;
1027 }
1028 }
1029 }
1030 }
1031
1032 return found_klass;
1033 }
1034
1035 // ------------------------------------------------------------------
1036 Klass* JVMCIRuntime::get_klass_by_name(Klass* accessing_klass,
1037 Symbol* klass_name,
1038 bool require_local) {
1039 ResourceMark rm;
1040 constantPoolHandle cpool;
1041 return get_klass_by_name_impl(accessing_klass,
1042 cpool,
1043 klass_name,
1044 require_local);
1045 }
1046
1047 // ------------------------------------------------------------------
1048 // Implementation of get_klass_by_index.
1049 Klass* JVMCIRuntime::get_klass_by_index_impl(const constantPoolHandle& cpool,
1050 int index,
1051 bool& is_accessible,
1052 Klass* accessor) {
1053 JVMCI_EXCEPTION_CONTEXT;
1054 Klass* klass = ConstantPool::klass_at_if_loaded(cpool, index);
1055 Symbol* klass_name = NULL;
1056 if (klass == NULL) {
1057 klass_name = cpool->klass_name_at(index);
1058 }
1059
1060 if (klass == NULL) {
1061 // Not found in constant pool. Use the name to do the lookup.
1062 Klass* k = get_klass_by_name_impl(accessor,
1063 cpool,
1064 klass_name,
1065 false);
1066 // Calculate accessibility the hard way.
1067 if (k == NULL) {
1068 is_accessible = false;
1069 } else if (k->class_loader() != accessor->class_loader() &&
1070 get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) {
1071 // Loaded only remotely. Not linked yet.
1072 is_accessible = false;
1073 } else {
1074 // Linked locally, and we must also check public/private, etc.
1075 is_accessible = check_klass_accessibility(accessor, k);
1076 }
1077 if (!is_accessible) {
1078 return NULL;
1079 }
1080 return k;
1081 }
1082
1083 // It is known to be accessible, since it was found in the constant pool.
1084 is_accessible = true;
1085 return klass;
1086 }
1087
1088 // ------------------------------------------------------------------
1089 // Get a klass from the constant pool.
1090 Klass* JVMCIRuntime::get_klass_by_index(const constantPoolHandle& cpool,
1091 int index,
1092 bool& is_accessible,
1093 Klass* accessor) {
1094 ResourceMark rm;
1095 Klass* result = get_klass_by_index_impl(cpool, index, is_accessible, accessor);
1096 return result;
1097 }
1098
1099 // ------------------------------------------------------------------
1100 // Implementation of get_field_by_index.
1101 //
1102 // Implementation note: the results of field lookups are cached
1103 // in the accessor klass.
1104 void JVMCIRuntime::get_field_by_index_impl(InstanceKlass* klass, fieldDescriptor& field_desc,
1105 int index) {
1106 JVMCI_EXCEPTION_CONTEXT;
1107
1108 assert(klass->is_linked(), "must be linked before using its constant-pool");
1109
1110 constantPoolHandle cpool(thread, klass->constants());
1111
1112 // Get the field's name, signature, and type.
1113 Symbol* name = cpool->name_ref_at(index);
1114
1115 int nt_index = cpool->name_and_type_ref_index_at(index);
1116 int sig_index = cpool->signature_ref_index_at(nt_index);
1117 Symbol* signature = cpool->symbol_at(sig_index);
1118
1119 // Get the field's declared holder.
1120 int holder_index = cpool->klass_ref_index_at(index);
1121 bool holder_is_accessible;
1122 Klass* declared_holder = get_klass_by_index(cpool, holder_index,
1123 holder_is_accessible,
1124 klass);
1125
1126 // The declared holder of this field may not have been loaded.
1127 // Bail out with partial field information.
1128 if (!holder_is_accessible) {
1129 return;
1130 }
1131
1132
1133 // Perform the field lookup.
1134 Klass* canonical_holder =
1135 InstanceKlass::cast(declared_holder)->find_field(name, signature, &field_desc);
1136 if (canonical_holder == NULL) {
1137 return;
1138 }
1139
1140 assert(canonical_holder == field_desc.field_holder(), "just checking");
1141 }
1142
1143 // ------------------------------------------------------------------
1144 // Get a field by index from a klass's constant pool.
1145 void JVMCIRuntime::get_field_by_index(InstanceKlass* accessor, fieldDescriptor& fd, int index) {
1146 ResourceMark rm;
1147 return get_field_by_index_impl(accessor, fd, index);
1148 }
1149
1150 // ------------------------------------------------------------------
1151 // Perform an appropriate method lookup based on accessor, holder,
1152 // name, signature, and bytecode.
1153 methodHandle JVMCIRuntime::lookup_method(InstanceKlass* accessor,
1154 Klass* holder,
1155 Symbol* name,
1156 Symbol* sig,
1157 Bytecodes::Code bc,
1158 constantTag tag) {
1159 // Accessibility checks are performed in JVMCIEnv::get_method_by_index_impl().
1160 assert(check_klass_accessibility(accessor, holder), "holder not accessible");
1161
1162 methodHandle dest_method;
1163 LinkInfo link_info(holder, name, sig, accessor, LinkInfo::needs_access_check, tag);
1164 switch (bc) {
1165 case Bytecodes::_invokestatic:
1166 dest_method =
1167 LinkResolver::resolve_static_call_or_null(link_info);
1168 break;
1169 case Bytecodes::_invokespecial:
1170 dest_method =
1171 LinkResolver::resolve_special_call_or_null(link_info);
1172 break;
1173 case Bytecodes::_invokeinterface:
1174 dest_method =
1175 LinkResolver::linktime_resolve_interface_method_or_null(link_info);
1176 break;
1177 case Bytecodes::_invokevirtual:
1178 dest_method =
1179 LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
1180 break;
1181 default: ShouldNotReachHere();
1182 }
1183
1184 return dest_method;
1185 }
1186
1187
1188 // ------------------------------------------------------------------
1189 methodHandle JVMCIRuntime::get_method_by_index_impl(const constantPoolHandle& cpool,
1190 int index, Bytecodes::Code bc,
1191 InstanceKlass* accessor) {
1192 if (bc == Bytecodes::_invokedynamic) {
1193 ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index);
1194 bool is_resolved = !cpce->is_f1_null();
1195 if (is_resolved) {
1196 // Get the invoker Method* from the constant pool.
1197 // (The appendix argument, if any, will be noted in the method's signature.)
1198 Method* adapter = cpce->f1_as_method();
1199 return methodHandle(adapter);
1200 }
1201
1202 return NULL;
1203 }
1204
1205 int holder_index = cpool->klass_ref_index_at(index);
1206 bool holder_is_accessible;
1207 Klass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
1208
1209 // Get the method's name and signature.
1210 Symbol* name_sym = cpool->name_ref_at(index);
1211 Symbol* sig_sym = cpool->signature_ref_at(index);
1212
1213 if (cpool->has_preresolution()
1214 || ((holder == SystemDictionary::MethodHandle_klass() || holder == SystemDictionary::VarHandle_klass()) &&
1215 MethodHandles::is_signature_polymorphic_name(holder, name_sym))) {
1216 // Short-circuit lookups for JSR 292-related call sites.
1217 // That is, do not rely only on name-based lookups, because they may fail
1218 // if the names are not resolvable in the boot class loader (7056328).
1219 switch (bc) {
1220 case Bytecodes::_invokevirtual:
1221 case Bytecodes::_invokeinterface:
1222 case Bytecodes::_invokespecial:
1223 case Bytecodes::_invokestatic:
1224 {
1225 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
1226 if (m != NULL) {
1227 return m;
1228 }
1229 }
1230 break;
1231 default:
1232 break;
1233 }
1234 }
1235
1236 if (holder_is_accessible) { // Our declared holder is loaded.
1237 constantTag tag = cpool->tag_ref_at(index);
1238 methodHandle m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
1239 if (!m.is_null()) {
1240 // We found the method.
1241 return m;
1242 }
1243 }
1244
1245 // Either the declared holder was not loaded, or the method could
1246 // not be found.
1247
1248 return NULL;
1249 }
1250
1251 // ------------------------------------------------------------------
1252 InstanceKlass* JVMCIRuntime::get_instance_klass_for_declared_method_holder(Klass* method_holder) {
1253 // For the case of <array>.clone(), the method holder can be an ArrayKlass*
1254 // instead of an InstanceKlass*. For that case simply pretend that the
1255 // declared holder is Object.clone since that's where the call will bottom out.
1256 if (method_holder->is_instance_klass()) {
1257 return InstanceKlass::cast(method_holder);
1258 } else if (method_holder->is_array_klass()) {
1259 return InstanceKlass::cast(SystemDictionary::Object_klass());
1260 } else {
1261 ShouldNotReachHere();
1262 }
1263 return NULL;
1264 }
1265
1266
1267 // ------------------------------------------------------------------
1268 methodHandle JVMCIRuntime::get_method_by_index(const constantPoolHandle& cpool,
1269 int index, Bytecodes::Code bc,
1270 InstanceKlass* accessor) {
1271 ResourceMark rm;
1272 return get_method_by_index_impl(cpool, index, bc, accessor);
1273 }
1274
1275 // ------------------------------------------------------------------
1276 // Check for changes to the system dictionary during compilation
1277 // class loads, evolution, breakpoints
1278 JVMCI::CodeInstallResult JVMCIRuntime::validate_compile_task_dependencies(Dependencies* dependencies, JVMCICompileState* compile_state, char** failure_detail) {
1279 // If JVMTI capabilities were enabled during compile, the compilation is invalidated.
1280 if (compile_state != NULL && compile_state->jvmti_state_changed()) {
1281 *failure_detail = (char*) "Jvmti state change during compilation invalidated dependencies";
1282 return JVMCI::dependencies_failed;
1283 }
1284
1285 CompileTask* task = compile_state == NULL ? NULL : compile_state->task();
1286 Dependencies::DepType result = dependencies->validate_dependencies(task, failure_detail);
1287 if (result == Dependencies::end_marker) {
1288 return JVMCI::ok;
1289 }
1290
1291 return JVMCI::dependencies_failed;
1292 }
1293
1294 // Reports a pending exception and exits the VM.
1295 static void fatal_exception_in_compile(JVMCIEnv* JVMCIENV, JavaThread* thread, const char* msg) {
1296 // Only report a fatal JVMCI compilation exception once
1297 static volatile int report_init_failure = 0;
1298 if (!report_init_failure && Atomic::cmpxchg(1, &report_init_failure, 0) == 0) {
1299 tty->print_cr("%s:", msg);
1300 JVMCIENV->describe_pending_exception(true);
1301 }
1302 JVMCIENV->clear_pending_exception();
1303 before_exit(thread);
1304 vm_exit(-1);
1305 }
1306
1307 void JVMCIRuntime::compile_method(JVMCIEnv* JVMCIENV, JVMCICompiler* compiler, const methodHandle& method, int entry_bci) {
1308 JVMCI_EXCEPTION_CONTEXT
1309
1310 JVMCICompileState* compile_state = JVMCIENV->compile_state();
1311
1312 bool is_osr = entry_bci != InvocationEntryBci;
1313 if (compiler->is_bootstrapping() && is_osr) {
1314 // no OSR compilations during bootstrap - the compiler is just too slow at this point,
1315 // and we know that there are no endless loops
1316 compile_state->set_failure(true, "No OSR during boostrap");
1317 return;
1318 }
1319 if (JVMCI::shutdown_called()) {
1320 compile_state->set_failure(false, "Avoiding compilation during shutdown");
1321 return;
1322 }
1323
1324 HandleMark hm;
1325 JVMCIObject receiver = get_HotSpotJVMCIRuntime(JVMCIENV);
1326 if (JVMCIENV->has_pending_exception()) {
1327 fatal_exception_in_compile(JVMCIENV, thread, "Exception during HotSpotJVMCIRuntime initialization");
1328 }
1329 JVMCIObject jvmci_method = JVMCIENV->get_jvmci_method(method, JVMCIENV);
1330 if (JVMCIENV->has_pending_exception()) {
1331 JVMCIENV->describe_pending_exception(true);
1332 compile_state->set_failure(false, "exception getting JVMCI wrapper method");
1333 return;
1334 }
1335
1336 JVMCIObject result_object = JVMCIENV->call_HotSpotJVMCIRuntime_compileMethod(receiver, jvmci_method, entry_bci,
1337 (jlong) compile_state, compile_state->task()->compile_id());
1338 if (!JVMCIENV->has_pending_exception()) {
1339 if (result_object.is_non_null()) {
1340 JVMCIObject failure_message = JVMCIENV->get_HotSpotCompilationRequestResult_failureMessage(result_object);
1341 if (failure_message.is_non_null()) {
1342 // Copy failure reason into resource memory first ...
1343 const char* failure_reason = JVMCIENV->as_utf8_string(failure_message);
1344 // ... and then into the C heap.
1345 failure_reason = os::strdup(failure_reason, mtJVMCI);
1346 bool retryable = JVMCIENV->get_HotSpotCompilationRequestResult_retry(result_object) != 0;
1347 compile_state->set_failure(retryable, failure_reason, true);
1348 } else {
1349 if (compile_state->task()->code() == NULL) {
1350 compile_state->set_failure(true, "no nmethod produced");
1351 } else {
1352 compile_state->task()->set_num_inlined_bytecodes(JVMCIENV->get_HotSpotCompilationRequestResult_inlinedBytecodes(result_object));
1353 compiler->inc_methods_compiled();
1354 }
1355 }
1356 } else {
1357 assert(false, "JVMCICompiler.compileMethod should always return non-null");
1358 }
1359 } else {
1360 // An uncaught exception here implies failure during compiler initialization.
1361 // The only sensible thing to do here is to exit the VM.
1362 fatal_exception_in_compile(JVMCIENV, thread, "Exception during JVMCI compiler initialization");
1363 }
1364 if (compiler->is_bootstrapping()) {
1365 compiler->set_bootstrap_compilation_request_handled();
1366 }
1367 }
1368
1369
1370 // ------------------------------------------------------------------
1371 JVMCI::CodeInstallResult JVMCIRuntime::register_method(JVMCIEnv* JVMCIENV,
1372 const methodHandle& method,
1373 nmethod*& nm,
1374 int entry_bci,
1375 CodeOffsets* offsets,
1376 int orig_pc_offset,
1377 CodeBuffer* code_buffer,
1378 int frame_words,
1379 OopMapSet* oop_map_set,
1380 ExceptionHandlerTable* handler_table,
1381 ImplicitExceptionTable* implicit_exception_table,
1382 AbstractCompiler* compiler,
1383 DebugInformationRecorder* debug_info,
1384 Dependencies* dependencies,
1385 int compile_id,
1386 bool has_unsafe_access,
1387 bool has_wide_vector,
1388 JVMCIObject compiled_code,
1389 JVMCIObject nmethod_mirror,
1390 FailedSpeculation** failed_speculations,
1391 char* speculations,
1392 int speculations_len) {
1393 JVMCI_EXCEPTION_CONTEXT;
1394 nm = NULL;
1395 int comp_level = CompLevel_full_optimization;
1396 char* failure_detail = NULL;
1397
1398 bool install_default = JVMCIENV->get_HotSpotNmethod_isDefault(nmethod_mirror) != 0;
1399 assert(JVMCIENV->isa_HotSpotNmethod(nmethod_mirror), "must be");
1400 JVMCIObject name = JVMCIENV->get_InstalledCode_name(nmethod_mirror);
1401 const char* nmethod_mirror_name = name.is_null() ? NULL : JVMCIENV->as_utf8_string(name);
1402 int nmethod_mirror_index;
1403 if (!install_default) {
1404 // Reserve or initialize mirror slot in the oops table.
1405 OopRecorder* oop_recorder = debug_info->oop_recorder();
1406 nmethod_mirror_index = oop_recorder->allocate_oop_index(nmethod_mirror.is_hotspot() ? nmethod_mirror.as_jobject() : NULL);
1407 } else {
1408 // A default HotSpotNmethod mirror is never tracked by the nmethod
1409 nmethod_mirror_index = -1;
1410 }
1411
1412 JVMCI::CodeInstallResult result;
1413 {
1414 // To prevent compile queue updates.
1415 MutexLocker locker(MethodCompileQueue_lock, THREAD);
1416
1417 // Prevent SystemDictionary::add_to_hierarchy from running
1418 // and invalidating our dependencies until we install this method.
1419 MutexLocker ml(Compile_lock);
1420
1421 // Encode the dependencies now, so we can check them right away.
1422 dependencies->encode_content_bytes();
1423
1424 // Record the dependencies for the current compile in the log
1425 if (LogCompilation) {
1426 for (Dependencies::DepStream deps(dependencies); deps.next(); ) {
1427 deps.log_dependency();
1428 }
1429 }
1430
1431 // Check for {class loads, evolution, breakpoints} during compilation
1432 result = validate_compile_task_dependencies(dependencies, JVMCIENV->compile_state(), &failure_detail);
1433 if (result != JVMCI::ok) {
1434 // While not a true deoptimization, it is a preemptive decompile.
1435 MethodData* mdp = method()->method_data();
1436 if (mdp != NULL) {
1437 mdp->inc_decompile_count();
1438 #ifdef ASSERT
1439 if (mdp->decompile_count() > (uint)PerMethodRecompilationCutoff) {
1440 ResourceMark m;
1441 tty->print_cr("WARN: endless recompilation of %s. Method was set to not compilable.", method()->name_and_sig_as_C_string());
1442 }
1443 #endif
1444 }
1445
1446 // All buffers in the CodeBuffer are allocated in the CodeCache.
1447 // If the code buffer is created on each compile attempt
1448 // as in C2, then it must be freed.
1449 //code_buffer->free_blob();
1450 } else {
1451 nm = nmethod::new_nmethod(method,
1452 compile_id,
1453 entry_bci,
1454 offsets,
1455 orig_pc_offset,
1456 debug_info, dependencies, code_buffer,
1457 frame_words, oop_map_set,
1458 handler_table, implicit_exception_table,
1459 compiler, comp_level,
1460 speculations, speculations_len,
1461 nmethod_mirror_index, nmethod_mirror_name, failed_speculations);
1462
1463
1464 // Free codeBlobs
1465 if (nm == NULL) {
1466 // The CodeCache is full. Print out warning and disable compilation.
1467 {
1468 MutexUnlocker ml(Compile_lock);
1469 MutexUnlocker locker(MethodCompileQueue_lock);
1470 CompileBroker::handle_full_code_cache(CodeCache::get_code_blob_type(comp_level));
1471 }
1472 } else {
1473 nm->set_has_unsafe_access(has_unsafe_access);
1474 nm->set_has_wide_vectors(has_wide_vector);
1475
1476 // Record successful registration.
1477 // (Put nm into the task handle *before* publishing to the Java heap.)
1478 if (JVMCIENV->compile_state() != NULL) {
1479 JVMCIENV->compile_state()->task()->set_code(nm);
1480 }
1481
1482 JVMCINMethodData* data = nm->jvmci_nmethod_data();
1483 assert(data != NULL, "must be");
1484 if (install_default) {
1485 assert(!nmethod_mirror.is_hotspot() || data->get_nmethod_mirror(nm, /* phantom_ref */ false) == NULL, "must be");
1486 if (entry_bci == InvocationEntryBci) {
1487 if (TieredCompilation) {
1488 // If there is an old version we're done with it
1489 CompiledMethod* old = method->code();
1490 if (TraceMethodReplacement && old != NULL) {
1491 ResourceMark rm;
1492 char *method_name = method->name_and_sig_as_C_string();
1493 tty->print_cr("Replacing method %s", method_name);
1494 }
1495 if (old != NULL ) {
1496 old->make_not_entrant();
1497 }
1498 }
1499
1500 LogTarget(Info, nmethod, install) lt;
1501 if (lt.is_enabled()) {
1502 ResourceMark rm;
1503 char *method_name = method->name_and_sig_as_C_string();
1504 lt.print("Installing method (%d) %s [entry point: %p]",
1505 comp_level, method_name, nm->entry_point());
1506 }
1507 // Allow the code to be executed
1508 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1509 if (nm->make_in_use()) {
1510 method->set_code(method, nm);
1511 }
1512 } else {
1513 LogTarget(Info, nmethod, install) lt;
1514 if (lt.is_enabled()) {
1515 ResourceMark rm;
1516 char *method_name = method->name_and_sig_as_C_string();
1517 lt.print("Installing osr method (%d) %s @ %d",
1518 comp_level, method_name, entry_bci);
1519 }
1520 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1521 if (nm->make_in_use()) {
1522 InstanceKlass::cast(method->method_holder())->add_osr_nmethod(nm);
1523 }
1524 }
1525 } else {
1526 assert(!nmethod_mirror.is_hotspot() || data->get_nmethod_mirror(nm, /* phantom_ref */ false) == HotSpotJVMCI::resolve(nmethod_mirror), "must be");
1527 }
1528 }
1529 result = nm != NULL ? JVMCI::ok :JVMCI::cache_full;
1530 }
1531 }
1532
1533 // String creation must be done outside lock
1534 if (failure_detail != NULL) {
1535 // A failure to allocate the string is silently ignored.
1536 JVMCIObject message = JVMCIENV->create_string(failure_detail, JVMCIENV);
1537 JVMCIENV->set_HotSpotCompiledNmethod_installationFailureMessage(compiled_code, message);
1538 }
1539
1540 // JVMTI -- compiled method notification (must be done outside lock)
1541 if (nm != NULL) {
1542 nm->post_compiled_method_load_event();
1543 }
1544
1545 return result;
1546 }