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 "jvm.h"
26 #include "asm/codeBuffer.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "code/codeCache.hpp"
29 #include "code/compiledMethod.inline.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/disassembler.hpp"
32 #include "jvmci/jvmciRuntime.hpp"
33 #include "jvmci/jvmciCompilerToVM.hpp"
34 #include "jvmci/jvmciCompiler.hpp"
35 #include "jvmci/jvmciJavaClasses.hpp"
36 #include "jvmci/jvmciEnv.hpp"
37 #include "logging/log.hpp"
38 #include "memory/allocation.inline.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "oops/objArrayOop.inline.hpp"
43 #include "runtime/biasedLocking.hpp"
44 #include "runtime/frame.inline.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/interfaceSupport.inline.hpp"
47 #include "runtime/jniHandles.inline.hpp"
48 #include "runtime/reflection.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "runtime/threadSMR.hpp"
51 #include "utilities/debug.hpp"
52 #include "utilities/defaultStream.hpp"
53 #include "utilities/macros.hpp"
54 #if INCLUDE_G1GC
55 #include "gc/g1/g1ThreadLocalData.hpp"
56 #endif // INCLUDE_G1GC
57
58 #if defined(_MSC_VER)
59 #define strtoll _strtoi64
60 #endif
61
62 jobject JVMCIRuntime::_HotSpotJVMCIRuntime_instance = NULL;
63 bool JVMCIRuntime::_HotSpotJVMCIRuntime_initialized = false;
64 bool JVMCIRuntime::_well_known_classes_initialized = false;
65 JVMCIRuntime::CompLevelAdjustment JVMCIRuntime::_comp_level_adjustment = JVMCIRuntime::none;
66 bool JVMCIRuntime::_shutdown_called = false;
67
68 BasicType JVMCIRuntime::kindToBasicType(Handle kind, TRAPS) {
69 if (kind.is_null()) {
70 THROW_(vmSymbols::java_lang_NullPointerException(), T_ILLEGAL);
71 }
72 jchar ch = JavaKind::typeChar(kind);
73 switch(ch) {
74 case 'Z': return T_BOOLEAN;
75 case 'B': return T_BYTE;
76 case 'S': return T_SHORT;
77 case 'C': return T_CHAR;
78 case 'I': return T_INT;
79 case 'F': return T_FLOAT;
80 case 'J': return T_LONG;
81 case 'D': return T_DOUBLE;
82 case 'A': return T_OBJECT;
83 case '-': return T_ILLEGAL;
84 default:
85 JVMCI_ERROR_(T_ILLEGAL, "unexpected Kind: %c", ch);
86 }
87 }
88
89 // Simple helper to see if the caller of a runtime stub which
90 // entered the VM has been deoptimized
91
92 static bool caller_is_deopted() {
93 JavaThread* thread = JavaThread::current();
94 RegisterMap reg_map(thread, false);
95 frame runtime_frame = thread->last_frame();
96 frame caller_frame = runtime_frame.sender(®_map);
97 assert(caller_frame.is_compiled_frame(), "must be compiled");
98 return caller_frame.is_deoptimized_frame();
99 }
100
101 // Stress deoptimization
102 static void deopt_caller() {
103 if ( !caller_is_deopted()) {
104 JavaThread* thread = JavaThread::current();
105 RegisterMap reg_map(thread, false);
106 frame runtime_frame = thread->last_frame();
107 frame caller_frame = runtime_frame.sender(®_map);
108 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
109 assert(caller_is_deopted(), "Must be deoptimized");
110 }
111 }
112
113 // Manages a scope for a JVMCI runtime call that attempts a heap allocation.
114 // If there is a pending exception upon closing the scope and the runtime
115 // call is of the variety where allocation failure returns NULL without an
116 // exception, the following action is taken:
117 // 1. The pending exception is cleared
118 // 2. NULL is written to JavaThread::_vm_result
119 // 3. Checks that an OutOfMemoryError is Universe::out_of_memory_error_retry().
120 class RetryableAllocationMark: public StackObj {
121 private:
122 JavaThread* _thread;
123 public:
124 RetryableAllocationMark(JavaThread* thread, bool activate) {
125 if (activate) {
126 assert(!thread->in_retryable_allocation(), "retryable allocation scope is non-reentrant");
127 _thread = thread;
128 _thread->set_in_retryable_allocation(true);
129 } else {
130 _thread = NULL;
131 }
132 }
133 ~RetryableAllocationMark() {
134 if (_thread != NULL) {
135 _thread->set_in_retryable_allocation(false);
136 JavaThread* THREAD = _thread;
137 if (HAS_PENDING_EXCEPTION) {
138 oop ex = PENDING_EXCEPTION;
139 CLEAR_PENDING_EXCEPTION;
140 oop retry_oome = Universe::out_of_memory_error_retry();
141 if (ex->is_a(retry_oome->klass()) && retry_oome != ex) {
142 ResourceMark rm;
143 fatal("Unexpected exception in scope of retryable allocation: " INTPTR_FORMAT " of type %s", p2i(ex), ex->klass()->external_name());
144 }
145 _thread->set_vm_result(NULL);
146 }
147 }
148 }
149 };
150
151 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance_common(JavaThread* thread, Klass* klass, bool null_on_fail))
152 JRT_BLOCK;
153 assert(klass->is_klass(), "not a class");
154 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
155 InstanceKlass* ik = InstanceKlass::cast(klass);
156 {
157 RetryableAllocationMark ram(thread, null_on_fail);
158 ik->check_valid_for_instantiation(true, CHECK);
159 oop obj;
160 if (null_on_fail) {
161 if (!ik->is_initialized()) {
162 // Cannot re-execute class initialization without side effects
163 // so return without attempting the initialization
164 return;
165 }
166 } else {
167 // make sure klass is initialized
168 ik->initialize(CHECK);
169 }
170 // allocate instance and return via TLS
171 obj = ik->allocate_instance(CHECK);
172 thread->set_vm_result(obj);
173 }
174 JRT_BLOCK_END;
175 SharedRuntime::on_slowpath_allocation_exit(thread);
176 JRT_END
177
178 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array_common(JavaThread* thread, Klass* array_klass, jint length, bool null_on_fail))
179 JRT_BLOCK;
180 // Note: no handle for klass needed since they are not used
181 // anymore after new_objArray() and no GC can happen before.
182 // (This may have to change if this code changes!)
183 assert(array_klass->is_klass(), "not a class");
184 oop obj;
185 if (array_klass->is_typeArray_klass()) {
186 BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
187 RetryableAllocationMark ram(thread, null_on_fail);
188 obj = oopFactory::new_typeArray(elt_type, length, CHECK);
189 } else {
190 Handle holder(THREAD, array_klass->klass_holder()); // keep the klass alive
191 Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
192 RetryableAllocationMark ram(thread, null_on_fail);
193 obj = oopFactory::new_objArray(elem_klass, length, CHECK);
194 }
195 thread->set_vm_result(obj);
196 // This is pretty rare but this runtime patch is stressful to deoptimization
197 // if we deoptimize here so force a deopt to stress the path.
198 if (DeoptimizeALot) {
199 static int deopts = 0;
200 // Alternate between deoptimizing and raising an error (which will also cause a deopt)
201 if (deopts++ % 2 == 0) {
202 if (null_on_fail) {
203 return;
204 } else {
205 ResourceMark rm(THREAD);
206 THROW(vmSymbols::java_lang_OutOfMemoryError());
207 }
208 } else {
209 deopt_caller();
210 }
211 }
212 JRT_BLOCK_END;
213 SharedRuntime::on_slowpath_allocation_exit(thread);
214 JRT_END
215
216 JRT_ENTRY(void, JVMCIRuntime::new_multi_array_common(JavaThread* thread, Klass* klass, int rank, jint* dims, bool null_on_fail))
217 assert(klass->is_klass(), "not a class");
218 assert(rank >= 1, "rank must be nonzero");
219 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
220 RetryableAllocationMark ram(thread, null_on_fail);
221 oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
222 thread->set_vm_result(obj);
223 JRT_END
224
225 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array_common(JavaThread* thread, oopDesc* element_mirror, jint length, bool null_on_fail))
226 RetryableAllocationMark ram(thread, null_on_fail);
227 oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
228 thread->set_vm_result(obj);
229 JRT_END
230
231 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance_common(JavaThread* thread, oopDesc* type_mirror, bool null_on_fail))
232 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(type_mirror));
233
234 if (klass == NULL) {
235 ResourceMark rm(THREAD);
236 THROW(vmSymbols::java_lang_InstantiationException());
237 }
238 RetryableAllocationMark ram(thread, null_on_fail);
239
240 // Create new instance (the receiver)
241 klass->check_valid_for_instantiation(false, CHECK);
242
243 if (null_on_fail) {
244 if (!klass->is_initialized()) {
245 // Cannot re-execute class initialization without side effects
246 // so return without attempting the initialization
247 return;
248 }
249 } else {
250 // Make sure klass gets initialized
251 klass->initialize(CHECK);
252 }
253
254 oop obj = klass->allocate_instance(CHECK);
255 thread->set_vm_result(obj);
256 JRT_END
257
258 extern void vm_exit(int code);
259
260 // Enter this method from compiled code handler below. This is where we transition
261 // to VM mode. This is done as a helper routine so that the method called directly
262 // from compiled code does not have to transition to VM. This allows the entry
263 // method to see if the nmethod that we have just looked up a handler for has
264 // been deoptimized while we were in the vm. This simplifies the assembly code
265 // cpu directories.
266 //
267 // We are entering here from exception stub (via the entry method below)
268 // If there is a compiled exception handler in this method, we will continue there;
269 // otherwise we will unwind the stack and continue at the caller of top frame method
270 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
271 // control the area where we can allow a safepoint. After we exit the safepoint area we can
272 // check to see if the handler we are going to return is now in a nmethod that has
273 // been deoptimized. If that is the case we return the deopt blob
274 // unpack_with_exception entry instead. This makes life for the exception blob easier
275 // because making that same check and diverting is painful from assembly language.
276 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, CompiledMethod*& cm))
277 // Reset method handle flag.
278 thread->set_is_method_handle_return(false);
279
280 Handle exception(thread, ex);
281 cm = CodeCache::find_compiled(pc);
282 assert(cm != NULL, "this is not a compiled method");
283 // Adjust the pc as needed/
284 if (cm->is_deopt_pc(pc)) {
285 RegisterMap map(thread, false);
286 frame exception_frame = thread->last_frame().sender(&map);
287 // if the frame isn't deopted then pc must not correspond to the caller of last_frame
288 assert(exception_frame.is_deoptimized_frame(), "must be deopted");
289 pc = exception_frame.pc();
290 }
291 #ifdef ASSERT
292 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
293 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
294 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
295 if (ExitVMOnVerifyError) vm_exit(-1);
296 ShouldNotReachHere();
297 }
298 #endif
299
300 // Check the stack guard pages and reenable them if necessary and there is
301 // enough space on the stack to do so. Use fast exceptions only if the guard
302 // pages are enabled.
303 bool guard_pages_enabled = thread->stack_guards_enabled();
304 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
305
306 if (JvmtiExport::can_post_on_exceptions()) {
307 // To ensure correct notification of exception catches and throws
308 // we have to deoptimize here. If we attempted to notify the
309 // catches and throws during this exception lookup it's possible
310 // we could deoptimize on the way out of the VM and end back in
311 // the interpreter at the throw site. This would result in double
312 // notifications since the interpreter would also notify about
313 // these same catches and throws as it unwound the frame.
314
315 RegisterMap reg_map(thread);
316 frame stub_frame = thread->last_frame();
317 frame caller_frame = stub_frame.sender(®_map);
318
319 // We don't really want to deoptimize the nmethod itself since we
320 // can actually continue in the exception handler ourselves but I
321 // don't see an easy way to have the desired effect.
322 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
323 assert(caller_is_deopted(), "Must be deoptimized");
324
325 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
326 }
327
328 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
329 if (guard_pages_enabled) {
330 address fast_continuation = cm->handler_for_exception_and_pc(exception, pc);
331 if (fast_continuation != NULL) {
332 // Set flag if return address is a method handle call site.
333 thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
334 return fast_continuation;
335 }
336 }
337
338 // If the stack guard pages are enabled, check whether there is a handler in
339 // the current method. Otherwise (guard pages disabled), force an unwind and
340 // skip the exception cache update (i.e., just leave continuation==NULL).
341 address continuation = NULL;
342 if (guard_pages_enabled) {
343
344 // New exception handling mechanism can support inlined methods
345 // with exception handlers since the mappings are from PC to PC
346
347 // debugging support
348 // tracing
349 if (log_is_enabled(Info, exceptions)) {
350 ResourceMark rm;
351 stringStream tempst;
352 assert(cm->method() != NULL, "Unexpected null method()");
353 tempst.print("compiled method <%s>\n"
354 " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT,
355 cm->method()->print_value_string(), p2i(pc), p2i(thread));
356 Exceptions::log_exception(exception, tempst);
357 }
358 // for AbortVMOnException flag
359 NOT_PRODUCT(Exceptions::debug_check_abort(exception));
360
361 // Clear out the exception oop and pc since looking up an
362 // exception handler can cause class loading, which might throw an
363 // exception and those fields are expected to be clear during
364 // normal bytecode execution.
365 thread->clear_exception_oop_and_pc();
366
367 bool recursive_exception = false;
368 continuation = SharedRuntime::compute_compiled_exc_handler(cm, pc, exception, false, false, recursive_exception);
369 // If an exception was thrown during exception dispatch, the exception oop may have changed
370 thread->set_exception_oop(exception());
371 thread->set_exception_pc(pc);
372
373 // the exception cache is used only by non-implicit exceptions
374 // Update the exception cache only when there didn't happen
375 // another exception during the computation of the compiled
376 // exception handler. Checking for exception oop equality is not
377 // sufficient because some exceptions are pre-allocated and reused.
378 if (continuation != NULL && !recursive_exception && !SharedRuntime::deopt_blob()->contains(continuation)) {
379 cm->add_handler_for_exception_and_pc(exception, pc, continuation);
380 }
381 }
382
383 // Set flag if return address is a method handle call site.
384 thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
385
386 if (log_is_enabled(Info, exceptions)) {
387 ResourceMark rm;
388 log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
389 " for exception thrown at PC " PTR_FORMAT,
390 p2i(thread), p2i(continuation), p2i(pc));
391 }
392
393 return continuation;
394 JRT_END
395
396 // Enter this method from compiled code only if there is a Java exception handler
397 // in the method handling the exception.
398 // We are entering here from exception stub. We don't do a normal VM transition here.
399 // We do it in a helper. This is so we can check to see if the nmethod we have just
400 // searched for an exception handler has been deoptimized in the meantime.
401 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
402 oop exception = thread->exception_oop();
403 address pc = thread->exception_pc();
404 // Still in Java mode
405 DEBUG_ONLY(ResetNoHandleMark rnhm);
406 CompiledMethod* cm = NULL;
407 address continuation = NULL;
408 {
409 // Enter VM mode by calling the helper
410 ResetNoHandleMark rnhm;
411 continuation = exception_handler_for_pc_helper(thread, exception, pc, cm);
412 }
413 // Back in JAVA, use no oops DON'T safepoint
414
415 // Now check to see if the compiled method we were called from is now deoptimized.
416 // If so we must return to the deopt blob and deoptimize the nmethod
417 if (cm != NULL && caller_is_deopted()) {
418 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
419 }
420
421 assert(continuation != NULL, "no handler found");
422 return continuation;
423 }
424
425 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
426 IF_TRACE_jvmci_3 {
427 char type[O_BUFLEN];
428 obj->klass()->name()->as_C_string(type, O_BUFLEN);
429 markOop mark = obj->mark();
430 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, p2i(mark), p2i(lock));
431 tty->flush();
432 }
433 #ifdef ASSERT
434 if (PrintBiasedLockingStatistics) {
435 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
436 }
437 #endif
438 Handle h_obj(thread, obj);
439 if (UseBiasedLocking) {
440 // Retry fast entry if bias is revoked to avoid unnecessary inflation
441 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK);
442 } else {
443 if (JVMCIUseFastLocking) {
444 // When using fast locking, the compiled code has already tried the fast case
445 ObjectSynchronizer::slow_enter(h_obj, lock, THREAD);
446 } else {
447 ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD);
448 }
449 }
450 TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));
451 JRT_END
452
453 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))
454 assert(thread == JavaThread::current(), "threads must correspond");
455 assert(thread->last_Java_sp(), "last_Java_sp must be set");
456 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
457 EXCEPTION_MARK;
458
459 #ifdef DEBUG
460 if (!oopDesc::is_oop(obj)) {
461 ResetNoHandleMark rhm;
462 nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();
463 if (method != NULL) {
464 tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));
465 }
466 thread->print_stack_on(tty);
467 assert(false, "invalid lock object pointer dected");
468 }
469 #endif
470
471 if (JVMCIUseFastLocking) {
472 // When using fast locking, the compiled code has already tried the fast case
473 ObjectSynchronizer::slow_exit(obj, lock, THREAD);
474 } else {
475 ObjectSynchronizer::fast_exit(obj, lock, THREAD);
476 }
477 IF_TRACE_jvmci_3 {
478 char type[O_BUFLEN];
479 obj->klass()->name()->as_C_string(type, O_BUFLEN);
480 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, p2i(obj->mark()), p2i(lock));
481 tty->flush();
482 }
483 JRT_END
484
485 // Object.notify() fast path, caller does slow path
486 JRT_LEAF(jboolean, JVMCIRuntime::object_notify(JavaThread *thread, oopDesc* obj))
487
488 // Very few notify/notifyAll operations find any threads on the waitset, so
489 // the dominant fast-path is to simply return.
490 // Relatedly, it's critical that notify/notifyAll be fast in order to
491 // reduce lock hold times.
492 if (!SafepointSynchronize::is_synchronizing()) {
493 if (ObjectSynchronizer::quick_notify(obj, thread, false)) {
494 return true;
495 }
496 }
497 return false; // caller must perform slow path
498
499 JRT_END
500
501 // Object.notifyAll() fast path, caller does slow path
502 JRT_LEAF(jboolean, JVMCIRuntime::object_notifyAll(JavaThread *thread, oopDesc* obj))
503
504 if (!SafepointSynchronize::is_synchronizing() ) {
505 if (ObjectSynchronizer::quick_notify(obj, thread, true)) {
506 return true;
507 }
508 }
509 return false; // caller must perform slow path
510
511 JRT_END
512
513 JRT_ENTRY(void, JVMCIRuntime::throw_and_post_jvmti_exception(JavaThread* thread, const char* exception, const char* message))
514 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
515 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
516 JRT_END
517
518 JRT_ENTRY(void, JVMCIRuntime::throw_klass_external_name_exception(JavaThread* thread, const char* exception, Klass* klass))
519 ResourceMark rm(thread);
520 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
521 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, klass->external_name());
522 JRT_END
523
524 JRT_ENTRY(void, JVMCIRuntime::throw_class_cast_exception(JavaThread* thread, const char* exception, Klass* caster_klass, Klass* target_klass))
525 ResourceMark rm(thread);
526 const char* message = SharedRuntime::generate_class_cast_message(caster_klass, target_klass);
527 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
528 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
529 JRT_END
530
531 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
532 ttyLocker ttyl;
533
534 if (obj == NULL) {
535 tty->print("NULL");
536 } else if (oopDesc::is_oop_or_null(obj, true) && (!as_string || !java_lang_String::is_instance(obj))) {
537 if (oopDesc::is_oop_or_null(obj, true)) {
538 char buf[O_BUFLEN];
539 tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
540 } else {
541 tty->print(INTPTR_FORMAT, p2i(obj));
542 }
543 } else {
544 ResourceMark rm;
545 assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
546 char *buf = java_lang_String::as_utf8_string(obj);
547 tty->print_raw(buf);
548 }
549 if (newline) {
550 tty->cr();
551 }
552 JRT_END
553
554 #if INCLUDE_G1GC
555
556 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
557 G1ThreadLocalData::satb_mark_queue(thread).enqueue(obj);
558 JRT_END
559
560 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
561 G1ThreadLocalData::dirty_card_queue(thread).enqueue(card_addr);
562 JRT_END
563
564 #endif // INCLUDE_G1GC
565
566 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
567 bool ret = true;
568 if(!Universe::heap()->is_in(parent)) {
569 tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
570 parent->print();
571 ret=false;
572 }
573 if(!Universe::heap()->is_in(child)) {
574 tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
575 child->print();
576 ret=false;
577 }
578 return (jint)ret;
579 JRT_END
580
581 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
582 ResourceMark rm;
583 const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
584 char *detail_msg = NULL;
585 if (format != 0L) {
586 const char* buf = (char*) (address) format;
587 size_t detail_msg_length = strlen(buf) * 2;
588 detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
589 jio_snprintf(detail_msg, detail_msg_length, buf, value);
590 report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
591 } else {
592 report_vm_error(__FILE__, __LINE__, error_msg);
593 }
594 JRT_END
595
596 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
597 oop exception = thread->exception_oop();
598 assert(exception != NULL, "npe");
599 thread->set_exception_oop(NULL);
600 thread->set_exception_pc(0);
601 return exception;
602 JRT_END
603
604 PRAGMA_DIAG_PUSH
605 PRAGMA_FORMAT_NONLITERAL_IGNORED
606 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, const char* format, jlong v1, jlong v2, jlong v3))
607 ResourceMark rm;
608 tty->print(format, v1, v2, v3);
609 JRT_END
610 PRAGMA_DIAG_POP
611
612 static void decipher(jlong v, bool ignoreZero) {
613 if (v != 0 || !ignoreZero) {
614 void* p = (void *)(address) v;
615 CodeBlob* cb = CodeCache::find_blob(p);
616 if (cb) {
617 if (cb->is_nmethod()) {
618 char buf[O_BUFLEN];
619 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()));
620 return;
621 }
622 cb->print_value_on(tty);
623 return;
624 }
625 if (Universe::heap()->is_in(p)) {
626 oop obj = oop(p);
627 obj->print_value_on(tty);
628 return;
629 }
630 tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
631 }
632 }
633
634 PRAGMA_DIAG_PUSH
635 PRAGMA_FORMAT_NONLITERAL_IGNORED
636 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
637 ResourceMark rm;
638 const char *buf = (const char*) (address) format;
639 if (vmError) {
640 if (buf != NULL) {
641 fatal(buf, v1, v2, v3);
642 } else {
643 fatal("<anonymous error>");
644 }
645 } else if (buf != NULL) {
646 tty->print(buf, v1, v2, v3);
647 } else {
648 assert(v2 == 0, "v2 != 0");
649 assert(v3 == 0, "v3 != 0");
650 decipher(v1, false);
651 }
652 JRT_END
653 PRAGMA_DIAG_POP
654
655 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
656 union {
657 jlong l;
658 jdouble d;
659 jfloat f;
660 } uu;
661 uu.l = value;
662 switch (typeChar) {
663 case 'Z': tty->print(value == 0 ? "false" : "true"); break;
664 case 'B': tty->print("%d", (jbyte) value); break;
665 case 'C': tty->print("%c", (jchar) value); break;
666 case 'S': tty->print("%d", (jshort) value); break;
667 case 'I': tty->print("%d", (jint) value); break;
668 case 'F': tty->print("%f", uu.f); break;
669 case 'J': tty->print(JLONG_FORMAT, value); break;
670 case 'D': tty->print("%lf", uu.d); break;
671 default: assert(false, "unknown typeChar"); break;
672 }
673 if (newline) {
674 tty->cr();
675 }
676 JRT_END
677
678 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
679 return (jint) obj->identity_hash();
680 JRT_END
681
682 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted))
683 Handle receiverHandle(thread, receiver);
684 // A nested ThreadsListHandle may require the Threads_lock which
685 // requires thread_in_vm which is why this method cannot be JRT_LEAF.
686 ThreadsListHandle tlh;
687
688 JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle());
689 if (receiverThread == NULL || (EnableThreadSMRExtraValidityChecks && !tlh.includes(receiverThread))) {
690 // The other thread may exit during this process, which is ok so return false.
691 return JNI_FALSE;
692 } else {
693 return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0);
694 }
695 JRT_END
696
697 JRT_ENTRY(int, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
698 deopt_caller();
699 return value;
700 JRT_END
701
702 void JVMCIRuntime::force_initialization(TRAPS) {
703 JVMCIRuntime::initialize_well_known_classes(CHECK);
704
705 ResourceMark rm;
706 TempNewSymbol getCompiler = SymbolTable::new_symbol("getCompiler", CHECK);
707 TempNewSymbol sig = SymbolTable::new_symbol("()Ljdk/vm/ci/runtime/JVMCICompiler;", CHECK);
708 Handle jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK);
709 JavaValue result(T_OBJECT);
710 JavaCalls::call_virtual(&result, jvmciRuntime, HotSpotJVMCIRuntime::klass(), getCompiler, sig, CHECK);
711 }
712
713 // private static JVMCIRuntime JVMCI.initializeRuntime()
714 JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
715 if (!EnableJVMCI) {
716 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")
717 }
718 JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL);
719 jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL);
720 return ret;
721 JVM_END
722
723 Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) {
724 TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle()));
725 Klass* klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle()));
726 TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle()));
727 TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle()));
728 JavaValue result(T_OBJECT);
729 if (args == NULL) {
730 JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle()));
731 } else {
732 JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle()));
733 }
734 return Handle(THREAD, (oop)result.get_jobject());
735 }
736
737 Handle JVMCIRuntime::get_HotSpotJVMCIRuntime(TRAPS) {
738 initialize_JVMCI(CHECK_(Handle()));
739 return Handle(THREAD, JNIHandles::resolve_non_null(_HotSpotJVMCIRuntime_instance));
740 }
741
742 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {
743 guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime");
744 JVMCIRuntime::initialize_well_known_classes(CHECK);
745 // This should only be called in the context of the JVMCI class being initialized
746 InstanceKlass* klass = SystemDictionary::JVMCI_klass();
747 guarantee(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),
748 "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");
749
750 Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",
751 "runtime",
752 "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);
753 int adjustment = HotSpotJVMCIRuntime::compilationLevelAdjustment(result);
754 assert(adjustment >= JVMCIRuntime::none &&
755 adjustment <= JVMCIRuntime::by_full_signature,
756 "compilation level adjustment out of bounds");
757 _comp_level_adjustment = (CompLevelAdjustment) adjustment;
758 _HotSpotJVMCIRuntime_initialized = true;
759 _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result);
760 }
761
762 void JVMCIRuntime::initialize_JVMCI(TRAPS) {
763 if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
764 callStatic("jdk/vm/ci/runtime/JVMCI",
765 "getRuntime",
766 "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK);
767 }
768 assert(_HotSpotJVMCIRuntime_initialized == true, "what?");
769 }
770
771 bool JVMCIRuntime::can_initialize_JVMCI() {
772 // Initializing JVMCI requires the module system to be initialized past phase 3.
773 // The JVMCI API itself isn't available until phase 2 and ServiceLoader (which
774 // JVMCI initialization requires) isn't usable until after phase 3. Testing
775 // whether the system loader is initialized satisfies all these invariants.
776 if (SystemDictionary::java_system_loader() == NULL) {
777 return false;
778 }
779 assert(Universe::is_module_initialized(), "must be");
780 return true;
781 }
782
783 void JVMCIRuntime::initialize_well_known_classes(TRAPS) {
784 if (JVMCIRuntime::_well_known_classes_initialized == false) {
785 guarantee(can_initialize_JVMCI(), "VM is not yet sufficiently booted to initialize JVMCI");
786 SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;
787 SystemDictionary::resolve_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);
788 JVMCIJavaClasses::compute_offsets(CHECK);
789 JVMCIRuntime::_well_known_classes_initialized = true;
790 }
791 }
792
793 void JVMCIRuntime::metadata_do(void f(Metadata*)) {
794 // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in
795 // the SystemDictionary well known classes should ensure the other
796 // classes have already been loaded, so make sure their order in the
797 // table enforces that.
798 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <
799 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
800 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <
801 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
802 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <
803 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
804
805 if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||
806 !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {
807 // Nothing could be registered yet
808 return;
809 }
810
811 // WeakReference<HotSpotJVMCIMetaAccessContext>[]
812 objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();
813 if (allContexts == NULL) {
814 return;
815 }
816
817 // These must be loaded at this point but the linking state doesn't matter.
818 assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");
819 assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");
820 assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");
821
822 for (int i = 0; i < allContexts->length(); i++) {
823 oop ref = allContexts->obj_at(i);
824 if (ref != NULL) {
825 oop referent = java_lang_ref_Reference::referent(ref);
826 if (referent != NULL) {
827 // Chunked Object[] with last element pointing to next chunk
828 objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);
829 while (metadataRoots != NULL) {
830 for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {
831 oop reference = metadataRoots->obj_at(typeIndex);
832 if (reference == NULL) {
833 continue;
834 }
835 oop metadataRoot = java_lang_ref_Reference::referent(reference);
836 if (metadataRoot == NULL) {
837 continue;
838 }
839 if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {
840 Method* method = CompilerToVM::asMethod(metadataRoot);
841 f(method);
842 } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {
843 ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);
844 f(constantPool);
845 } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {
846 Klass* klass = CompilerToVM::asKlass(metadataRoot);
847 f(klass);
848 } else {
849 metadataRoot->print();
850 ShouldNotReachHere();
851 }
852 }
853 metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);
854 assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");
855 }
856 }
857 }
858 }
859 }
860
861 // private static void CompilerToVM.registerNatives()
862 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
863 if (!EnableJVMCI) {
864 THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");
865 }
866
867 #ifdef _LP64
868 #ifndef SPARC
869 uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();
870 uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;
871 guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");
872 #endif // !SPARC
873 #else
874 fatal("check TLAB allocation code for address space conflicts");
875 #endif // _LP64
876
877 JVMCIRuntime::initialize_well_known_classes(CHECK);
878
879 {
880 ThreadToNativeFromVM trans(thread);
881 env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());
882 }
883 JVM_END
884
885 void JVMCIRuntime::shutdown(TRAPS) {
886 if (_HotSpotJVMCIRuntime_instance != NULL) {
887 _shutdown_called = true;
888 HandleMark hm(THREAD);
889 Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
890 JavaValue result(T_VOID);
891 JavaCallArguments args;
892 args.push_oop(receiver);
893 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
894 }
895 }
896
897 CompLevel JVMCIRuntime::adjust_comp_level_inner(const methodHandle& method, bool is_osr, CompLevel level, JavaThread* thread) {
898 JVMCICompiler* compiler = JVMCICompiler::instance(false, thread);
899 if (compiler != NULL && compiler->is_bootstrapping()) {
900 return level;
901 }
902 if (!is_HotSpotJVMCIRuntime_initialized() || _comp_level_adjustment == JVMCIRuntime::none) {
903 // JVMCI cannot participate in compilation scheduling until
904 // JVMCI is initialized and indicates it wants to participate.
905 return level;
906 }
907
908 #define CHECK_RETURN THREAD); \
909 if (HAS_PENDING_EXCEPTION) { \
910 Handle exception(THREAD, PENDING_EXCEPTION); \
911 CLEAR_PENDING_EXCEPTION; \
912 \
913 if (exception->is_a(SystemDictionary::ThreadDeath_klass())) { \
914 /* In the special case of ThreadDeath, we need to reset the */ \
915 /* pending async exception so that it is propagated. */ \
916 thread->set_pending_async_exception(exception()); \
917 return level; \
918 } \
919 tty->print("Uncaught exception while adjusting compilation level: "); \
920 java_lang_Throwable::print(exception(), tty); \
921 tty->cr(); \
922 java_lang_Throwable::print_stack_trace(exception, tty); \
923 if (HAS_PENDING_EXCEPTION) { \
924 CLEAR_PENDING_EXCEPTION; \
925 } \
926 return level; \
927 } \
928 (void)(0
929
930
931 Thread* THREAD = thread;
932 HandleMark hm;
933 Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_RETURN);
934 Handle name;
935 Handle sig;
936 if (_comp_level_adjustment == JVMCIRuntime::by_full_signature) {
937 name = java_lang_String::create_from_symbol(method->name(), CHECK_RETURN);
938 sig = java_lang_String::create_from_symbol(method->signature(), CHECK_RETURN);
939 } else {
940 name = Handle();
941 sig = Handle();
942 }
943
944 JavaValue result(T_INT);
945 JavaCallArguments args;
946 args.push_oop(receiver);
947 args.push_oop(Handle(THREAD, method->method_holder()->java_mirror()));
948 args.push_oop(name);
949 args.push_oop(sig);
950 args.push_int(is_osr);
951 args.push_int(level);
952 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::adjustCompilationLevel_name(),
953 vmSymbols::adjustCompilationLevel_signature(), &args, CHECK_RETURN);
954
955 int comp_level = result.get_jint();
956 if (comp_level < CompLevel_none || comp_level > CompLevel_full_optimization) {
957 assert(false, "compilation level out of bounds");
958 return level;
959 }
960 return (CompLevel) comp_level;
961 #undef CHECK_RETURN
962 }
963
964 void JVMCIRuntime::bootstrap_finished(TRAPS) {
965 HandleMark hm(THREAD);
966 Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
967 JavaValue result(T_VOID);
968 JavaCallArguments args;
969 args.push_oop(receiver);
970 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::bootstrapFinished_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
971 }