1 /*
2 * Copyright (c) 2012, 2018, 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/interfaceSupport.inline.hpp"
46 #include "runtime/jniHandles.inline.hpp"
47 #include "runtime/reflection.hpp"
48 #include "runtime/sharedRuntime.hpp"
49 #include "runtime/threadSMR.hpp"
50 #include "utilities/debug.hpp"
51 #include "utilities/defaultStream.hpp"
52 #include "utilities/macros.hpp"
53 #if INCLUDE_G1GC
54 #include "gc/g1/g1ThreadLocalData.hpp"
55 #endif // INCLUDE_G1GC
56
57 #if defined(_MSC_VER)
58 #define strtoll _strtoi64
59 #endif
60
61 jobject JVMCIRuntime::_HotSpotJVMCIRuntime_instance = NULL;
62 bool JVMCIRuntime::_HotSpotJVMCIRuntime_initialized = false;
63 bool JVMCIRuntime::_well_known_classes_initialized = false;
64 int JVMCIRuntime::_trivial_prefixes_count = 0;
65 char** JVMCIRuntime::_trivial_prefixes = NULL;
66 JVMCIRuntime::CompLevelAdjustment JVMCIRuntime::_comp_level_adjustment = JVMCIRuntime::none;
67 bool JVMCIRuntime::_shutdown_called = false;
68
69 BasicType JVMCIRuntime::kindToBasicType(Handle kind, TRAPS) {
70 if (kind.is_null()) {
71 THROW_(vmSymbols::java_lang_NullPointerException(), T_ILLEGAL);
72 }
73 jchar ch = JavaKind::typeChar(kind);
74 switch(ch) {
75 case 'Z': return T_BOOLEAN;
76 case 'B': return T_BYTE;
77 case 'S': return T_SHORT;
78 case 'C': return T_CHAR;
79 case 'I': return T_INT;
80 case 'F': return T_FLOAT;
81 case 'J': return T_LONG;
82 case 'D': return T_DOUBLE;
83 case 'A': return T_OBJECT;
84 case '-': return T_ILLEGAL;
85 default:
86 JVMCI_ERROR_(T_ILLEGAL, "unexpected Kind: %c", ch);
87 }
88 }
89
90 // Simple helper to see if the caller of a runtime stub which
91 // entered the VM has been deoptimized
92
93 static bool caller_is_deopted() {
94 JavaThread* thread = JavaThread::current();
95 RegisterMap reg_map(thread, false);
96 frame runtime_frame = thread->last_frame();
97 frame caller_frame = runtime_frame.sender(®_map);
98 assert(caller_frame.is_compiled_frame(), "must be compiled");
99 return caller_frame.is_deoptimized_frame();
100 }
101
102 // Stress deoptimization
103 static void deopt_caller() {
104 if ( !caller_is_deopted()) {
105 JavaThread* thread = JavaThread::current();
106 RegisterMap reg_map(thread, false);
107 frame runtime_frame = thread->last_frame();
108 frame caller_frame = runtime_frame.sender(®_map);
109 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
110 assert(caller_is_deopted(), "Must be deoptimized");
111 }
112 }
113
114 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass))
115 JRT_BLOCK;
116 assert(klass->is_klass(), "not a class");
117 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
118 InstanceKlass* ik = InstanceKlass::cast(klass);
119 ik->check_valid_for_instantiation(true, CHECK);
120 // make sure klass is initialized
121 ik->initialize(CHECK);
122 // allocate instance and return via TLS
123 oop obj = ik->allocate_instance(CHECK);
124 thread->set_vm_result(obj);
125 JRT_BLOCK_END;
126 SharedRuntime::on_slowpath_allocation_exit(thread);
127 JRT_END
128
129 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length))
130 JRT_BLOCK;
131 // Note: no handle for klass needed since they are not used
132 // anymore after new_objArray() and no GC can happen before.
133 // (This may have to change if this code changes!)
134 assert(array_klass->is_klass(), "not a class");
135 oop obj;
136 if (array_klass->is_typeArray_klass()) {
137 BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
138 obj = oopFactory::new_typeArray(elt_type, length, CHECK);
139 } else {
140 Handle holder(THREAD, array_klass->klass_holder()); // keep the klass alive
141 Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
142 obj = oopFactory::new_objArray(elem_klass, length, CHECK);
143 }
144 thread->set_vm_result(obj);
145 // This is pretty rare but this runtime patch is stressful to deoptimization
146 // if we deoptimize here so force a deopt to stress the path.
147 if (DeoptimizeALot) {
148 static int deopts = 0;
149 // Alternate between deoptimizing and raising an error (which will also cause a deopt)
150 if (deopts++ % 2 == 0) {
151 ResourceMark rm(THREAD);
152 THROW(vmSymbols::java_lang_OutOfMemoryError());
153 } else {
154 deopt_caller();
155 }
156 }
157 JRT_BLOCK_END;
158 SharedRuntime::on_slowpath_allocation_exit(thread);
159 JRT_END
160
161 JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))
162 assert(klass->is_klass(), "not a class");
163 assert(rank >= 1, "rank must be nonzero");
164 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
165 oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
166 thread->set_vm_result(obj);
167 JRT_END
168
169 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length))
170 oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
171 thread->set_vm_result(obj);
172 JRT_END
173
174 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror))
175 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(type_mirror));
176
177 if (klass == NULL) {
178 ResourceMark rm(THREAD);
179 THROW(vmSymbols::java_lang_InstantiationException());
180 }
181
182 // Create new instance (the receiver)
183 klass->check_valid_for_instantiation(false, CHECK);
184
185 // Make sure klass gets initialized
186 klass->initialize(CHECK);
187
188 oop obj = klass->allocate_instance(CHECK);
189 thread->set_vm_result(obj);
190 JRT_END
191
192 extern void vm_exit(int code);
193
194 // Enter this method from compiled code handler below. This is where we transition
195 // to VM mode. This is done as a helper routine so that the method called directly
196 // from compiled code does not have to transition to VM. This allows the entry
197 // method to see if the nmethod that we have just looked up a handler for has
198 // been deoptimized while we were in the vm. This simplifies the assembly code
199 // cpu directories.
200 //
201 // We are entering here from exception stub (via the entry method below)
202 // If there is a compiled exception handler in this method, we will continue there;
203 // otherwise we will unwind the stack and continue at the caller of top frame method
204 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
205 // control the area where we can allow a safepoint. After we exit the safepoint area we can
206 // check to see if the handler we are going to return is now in a nmethod that has
207 // been deoptimized. If that is the case we return the deopt blob
208 // unpack_with_exception entry instead. This makes life for the exception blob easier
209 // because making that same check and diverting is painful from assembly language.
210 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, CompiledMethod*& cm))
211 // Reset method handle flag.
212 thread->set_is_method_handle_return(false);
213
214 Handle exception(thread, ex);
215 cm = CodeCache::find_compiled(pc);
216 assert(cm != NULL, "this is not a compiled method");
217 // Adjust the pc as needed/
218 if (cm->is_deopt_pc(pc)) {
219 RegisterMap map(thread, false);
220 frame exception_frame = thread->last_frame().sender(&map);
221 // if the frame isn't deopted then pc must not correspond to the caller of last_frame
222 assert(exception_frame.is_deoptimized_frame(), "must be deopted");
223 pc = exception_frame.pc();
224 }
225 #ifdef ASSERT
226 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
227 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
228 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
229 if (ExitVMOnVerifyError) vm_exit(-1);
230 ShouldNotReachHere();
231 }
232 #endif
233
234 // Check the stack guard pages and reenable them if necessary and there is
235 // enough space on the stack to do so. Use fast exceptions only if the guard
236 // pages are enabled.
237 bool guard_pages_enabled = thread->stack_guards_enabled();
238 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
239
240 if (JvmtiExport::can_post_on_exceptions()) {
241 // To ensure correct notification of exception catches and throws
242 // we have to deoptimize here. If we attempted to notify the
243 // catches and throws during this exception lookup it's possible
244 // we could deoptimize on the way out of the VM and end back in
245 // the interpreter at the throw site. This would result in double
246 // notifications since the interpreter would also notify about
247 // these same catches and throws as it unwound the frame.
248
249 RegisterMap reg_map(thread);
250 frame stub_frame = thread->last_frame();
251 frame caller_frame = stub_frame.sender(®_map);
252
253 // We don't really want to deoptimize the nmethod itself since we
254 // can actually continue in the exception handler ourselves but I
255 // don't see an easy way to have the desired effect.
256 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
257 assert(caller_is_deopted(), "Must be deoptimized");
258
259 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
260 }
261
262 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
263 if (guard_pages_enabled) {
264 address fast_continuation = cm->handler_for_exception_and_pc(exception, pc);
265 if (fast_continuation != NULL) {
266 // Set flag if return address is a method handle call site.
267 thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
268 return fast_continuation;
269 }
270 }
271
272 // If the stack guard pages are enabled, check whether there is a handler in
273 // the current method. Otherwise (guard pages disabled), force an unwind and
274 // skip the exception cache update (i.e., just leave continuation==NULL).
275 address continuation = NULL;
276 if (guard_pages_enabled) {
277
278 // New exception handling mechanism can support inlined methods
279 // with exception handlers since the mappings are from PC to PC
280
281 // debugging support
282 // tracing
283 if (log_is_enabled(Info, exceptions)) {
284 ResourceMark rm;
285 stringStream tempst;
286 tempst.print("compiled method <%s>\n"
287 " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT,
288 cm->method()->print_value_string(), p2i(pc), p2i(thread));
289 Exceptions::log_exception(exception, tempst);
290 }
291 // for AbortVMOnException flag
292 NOT_PRODUCT(Exceptions::debug_check_abort(exception));
293
294 // Clear out the exception oop and pc since looking up an
295 // exception handler can cause class loading, which might throw an
296 // exception and those fields are expected to be clear during
297 // normal bytecode execution.
298 thread->clear_exception_oop_and_pc();
299
300 bool recursive_exception = false;
301 continuation = SharedRuntime::compute_compiled_exc_handler(cm, pc, exception, false, false, recursive_exception);
302 // If an exception was thrown during exception dispatch, the exception oop may have changed
303 thread->set_exception_oop(exception());
304 thread->set_exception_pc(pc);
305
306 // the exception cache is used only by non-implicit exceptions
307 // Update the exception cache only when there didn't happen
308 // another exception during the computation of the compiled
309 // exception handler. Checking for exception oop equality is not
310 // sufficient because some exceptions are pre-allocated and reused.
311 if (continuation != NULL && !recursive_exception && !SharedRuntime::deopt_blob()->contains(continuation)) {
312 cm->add_handler_for_exception_and_pc(exception, pc, continuation);
313 }
314 }
315
316 // Set flag if return address is a method handle call site.
317 thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
318
319 if (log_is_enabled(Info, exceptions)) {
320 ResourceMark rm;
321 log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
322 " for exception thrown at PC " PTR_FORMAT,
323 p2i(thread), p2i(continuation), p2i(pc));
324 }
325
326 return continuation;
327 JRT_END
328
329 // Enter this method from compiled code only if there is a Java exception handler
330 // in the method handling the exception.
331 // We are entering here from exception stub. We don't do a normal VM transition here.
332 // We do it in a helper. This is so we can check to see if the nmethod we have just
333 // searched for an exception handler has been deoptimized in the meantime.
334 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
335 oop exception = thread->exception_oop();
336 address pc = thread->exception_pc();
337 // Still in Java mode
338 DEBUG_ONLY(ResetNoHandleMark rnhm);
339 CompiledMethod* cm = NULL;
340 address continuation = NULL;
341 {
342 // Enter VM mode by calling the helper
343 ResetNoHandleMark rnhm;
344 continuation = exception_handler_for_pc_helper(thread, exception, pc, cm);
345 }
346 // Back in JAVA, use no oops DON'T safepoint
347
348 // Now check to see if the compiled method we were called from is now deoptimized.
349 // If so we must return to the deopt blob and deoptimize the nmethod
350 if (cm != NULL && caller_is_deopted()) {
351 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
352 }
353
354 assert(continuation != NULL, "no handler found");
355 return continuation;
356 }
357
358 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
359 IF_TRACE_jvmci_3 {
360 char type[O_BUFLEN];
361 obj->klass()->name()->as_C_string(type, O_BUFLEN);
362 markOop mark = obj->mark();
363 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));
364 tty->flush();
365 }
366 #ifdef ASSERT
367 if (PrintBiasedLockingStatistics) {
368 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
369 }
370 #endif
371 Handle h_obj(thread, obj);
372 if (UseBiasedLocking) {
373 // Retry fast entry if bias is revoked to avoid unnecessary inflation
374 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK);
375 } else {
376 if (JVMCIUseFastLocking) {
377 // When using fast locking, the compiled code has already tried the fast case
378 ObjectSynchronizer::slow_enter(h_obj, lock, THREAD);
379 } else {
380 ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD);
381 }
382 }
383 TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));
384 JRT_END
385
386 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))
387 assert(thread == JavaThread::current(), "threads must correspond");
388 assert(thread->last_Java_sp(), "last_Java_sp must be set");
389 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
390 EXCEPTION_MARK;
391
392 #ifdef DEBUG
393 if (!oopDesc::is_oop(obj)) {
394 ResetNoHandleMark rhm;
395 nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();
396 if (method != NULL) {
397 tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));
398 }
399 thread->print_stack_on(tty);
400 assert(false, "invalid lock object pointer dected");
401 }
402 #endif
403
404 if (JVMCIUseFastLocking) {
405 // When using fast locking, the compiled code has already tried the fast case
406 ObjectSynchronizer::slow_exit(obj, lock, THREAD);
407 } else {
408 ObjectSynchronizer::fast_exit(obj, lock, THREAD);
409 }
410 IF_TRACE_jvmci_3 {
411 char type[O_BUFLEN];
412 obj->klass()->name()->as_C_string(type, O_BUFLEN);
413 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));
414 tty->flush();
415 }
416 JRT_END
417
418 // Object.notify() fast path, caller does slow path
419 JRT_LEAF(jboolean, JVMCIRuntime::object_notify(JavaThread *thread, oopDesc* obj))
420
421 // Very few notify/notifyAll operations find any threads on the waitset, so
422 // the dominant fast-path is to simply return.
423 // Relatedly, it's critical that notify/notifyAll be fast in order to
424 // reduce lock hold times.
425 if (!SafepointSynchronize::is_synchronizing()) {
426 if (ObjectSynchronizer::quick_notify(obj, thread, false)) {
427 return true;
428 }
429 }
430 return false; // caller must perform slow path
431
432 JRT_END
433
434 // Object.notifyAll() fast path, caller does slow path
435 JRT_LEAF(jboolean, JVMCIRuntime::object_notifyAll(JavaThread *thread, oopDesc* obj))
436
437 if (!SafepointSynchronize::is_synchronizing() ) {
438 if (ObjectSynchronizer::quick_notify(obj, thread, true)) {
439 return true;
440 }
441 }
442 return false; // caller must perform slow path
443
444 JRT_END
445
446 JRT_ENTRY(void, JVMCIRuntime::throw_and_post_jvmti_exception(JavaThread* thread, const char* exception, const char* message))
447 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
448 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
449 JRT_END
450
451 JRT_ENTRY(void, JVMCIRuntime::throw_klass_external_name_exception(JavaThread* thread, const char* exception, Klass* klass))
452 ResourceMark rm(thread);
453 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
454 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, klass->external_name());
455 JRT_END
456
457 JRT_ENTRY(void, JVMCIRuntime::throw_class_cast_exception(JavaThread* thread, const char* exception, Klass* caster_klass, Klass* target_klass))
458 ResourceMark rm(thread);
459 const char* message = SharedRuntime::generate_class_cast_message(caster_klass, target_klass);
460 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
461 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
462 JRT_END
463
464 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
465 ttyLocker ttyl;
466
467 if (obj == NULL) {
468 tty->print("NULL");
469 } else if (oopDesc::is_oop_or_null(obj, true) && (!as_string || !java_lang_String::is_instance(obj))) {
470 if (oopDesc::is_oop_or_null(obj, true)) {
471 char buf[O_BUFLEN];
472 tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
473 } else {
474 tty->print(INTPTR_FORMAT, p2i(obj));
475 }
476 } else {
477 ResourceMark rm;
478 assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
479 char *buf = java_lang_String::as_utf8_string(obj);
480 tty->print_raw(buf);
481 }
482 if (newline) {
483 tty->cr();
484 }
485 JRT_END
486
487 #if INCLUDE_G1GC
488
489 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
490 G1ThreadLocalData::satb_mark_queue(thread).enqueue(obj);
491 JRT_END
492
493 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
494 G1ThreadLocalData::dirty_card_queue(thread).enqueue(card_addr);
495 JRT_END
496
497 #endif // INCLUDE_G1GC
498
499 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
500 bool ret = true;
501 if(!Universe::heap()->is_in_closed_subset(parent)) {
502 tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
503 parent->print();
504 ret=false;
505 }
506 if(!Universe::heap()->is_in_closed_subset(child)) {
507 tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
508 child->print();
509 ret=false;
510 }
511 return (jint)ret;
512 JRT_END
513
514 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
515 ResourceMark rm;
516 const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
517 char *detail_msg = NULL;
518 if (format != 0L) {
519 const char* buf = (char*) (address) format;
520 size_t detail_msg_length = strlen(buf) * 2;
521 detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
522 jio_snprintf(detail_msg, detail_msg_length, buf, value);
523 report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
524 } else {
525 report_vm_error(__FILE__, __LINE__, error_msg);
526 }
527 JRT_END
528
529 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
530 oop exception = thread->exception_oop();
531 assert(exception != NULL, "npe");
532 thread->set_exception_oop(NULL);
533 thread->set_exception_pc(0);
534 return exception;
535 JRT_END
536
537 PRAGMA_DIAG_PUSH
538 PRAGMA_FORMAT_NONLITERAL_IGNORED
539 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, oopDesc* format, jlong v1, jlong v2, jlong v3))
540 ResourceMark rm;
541 assert(format != NULL && java_lang_String::is_instance(format), "must be");
542 char *buf = java_lang_String::as_utf8_string(format);
543 tty->print((const char*)buf, v1, v2, v3);
544 JRT_END
545 PRAGMA_DIAG_POP
546
547 static void decipher(jlong v, bool ignoreZero) {
548 if (v != 0 || !ignoreZero) {
549 void* p = (void *)(address) v;
550 CodeBlob* cb = CodeCache::find_blob(p);
551 if (cb) {
552 if (cb->is_nmethod()) {
553 char buf[O_BUFLEN];
554 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()));
555 return;
556 }
557 cb->print_value_on(tty);
558 return;
559 }
560 if (Universe::heap()->is_in(p)) {
561 oop obj = oop(p);
562 obj->print_value_on(tty);
563 return;
564 }
565 tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
566 }
567 }
568
569 PRAGMA_DIAG_PUSH
570 PRAGMA_FORMAT_NONLITERAL_IGNORED
571 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
572 ResourceMark rm;
573 const char *buf = (const char*) (address) format;
574 if (vmError) {
575 if (buf != NULL) {
576 fatal(buf, v1, v2, v3);
577 } else {
578 fatal("<anonymous error>");
579 }
580 } else if (buf != NULL) {
581 tty->print(buf, v1, v2, v3);
582 } else {
583 assert(v2 == 0, "v2 != 0");
584 assert(v3 == 0, "v3 != 0");
585 decipher(v1, false);
586 }
587 JRT_END
588 PRAGMA_DIAG_POP
589
590 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
591 union {
592 jlong l;
593 jdouble d;
594 jfloat f;
595 } uu;
596 uu.l = value;
597 switch (typeChar) {
598 case 'Z': tty->print(value == 0 ? "false" : "true"); break;
599 case 'B': tty->print("%d", (jbyte) value); break;
600 case 'C': tty->print("%c", (jchar) value); break;
601 case 'S': tty->print("%d", (jshort) value); break;
602 case 'I': tty->print("%d", (jint) value); break;
603 case 'F': tty->print("%f", uu.f); break;
604 case 'J': tty->print(JLONG_FORMAT, value); break;
605 case 'D': tty->print("%lf", uu.d); break;
606 default: assert(false, "unknown typeChar"); break;
607 }
608 if (newline) {
609 tty->cr();
610 }
611 JRT_END
612
613 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
614 return (jint) obj->identity_hash();
615 JRT_END
616
617 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted))
618 Handle receiverHandle(thread, receiver);
619 // A nested ThreadsListHandle may require the Threads_lock which
620 // requires thread_in_vm which is why this method cannot be JRT_LEAF.
621 ThreadsListHandle tlh;
622
623 JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle());
624 if (receiverThread == NULL || (EnableThreadSMRExtraValidityChecks && !tlh.includes(receiverThread))) {
625 // The other thread may exit during this process, which is ok so return false.
626 return JNI_FALSE;
627 } else {
628 return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0);
629 }
630 JRT_END
631
632 JRT_ENTRY(int, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
633 deopt_caller();
634 return value;
635 JRT_END
636
637 void JVMCIRuntime::force_initialization(TRAPS) {
638 JVMCIRuntime::initialize_well_known_classes(CHECK);
639
640 ResourceMark rm;
641 TempNewSymbol getCompiler = SymbolTable::new_symbol("getCompiler", CHECK);
642 TempNewSymbol sig = SymbolTable::new_symbol("()Ljdk/vm/ci/runtime/JVMCICompiler;", CHECK);
643 Handle jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK);
644 JavaValue result(T_OBJECT);
645 JavaCalls::call_virtual(&result, jvmciRuntime, HotSpotJVMCIRuntime::klass(), getCompiler, sig, CHECK);
646 }
647
648 // private static JVMCIRuntime JVMCI.initializeRuntime()
649 JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
650 if (!EnableJVMCI) {
651 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")
652 }
653 JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL);
654 jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL);
655 return ret;
656 JVM_END
657
658 Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) {
659 TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle()));
660 Klass* klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle()));
661 TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle()));
662 TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle()));
663 JavaValue result(T_OBJECT);
664 if (args == NULL) {
665 JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle()));
666 } else {
667 JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle()));
668 }
669 return Handle(THREAD, (oop)result.get_jobject());
670 }
671
672 Handle JVMCIRuntime::get_HotSpotJVMCIRuntime(TRAPS) {
673 initialize_JVMCI(CHECK_(Handle()));
674 return Handle(THREAD, JNIHandles::resolve_non_null(_HotSpotJVMCIRuntime_instance));
675 }
676
677 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {
678 guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime");
679 JVMCIRuntime::initialize_well_known_classes(CHECK);
680 // This should only be called in the context of the JVMCI class being initialized
681 InstanceKlass* klass = SystemDictionary::JVMCI_klass();
682 guarantee(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),
683 "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");
684
685 Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",
686 "runtime",
687 "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);
688 objArrayOop trivial_prefixes = HotSpotJVMCIRuntime::trivialPrefixes(result);
689 if (trivial_prefixes != NULL) {
690 char** prefixes = NEW_C_HEAP_ARRAY(char*, trivial_prefixes->length(), mtCompiler);
691 for (int i = 0; i < trivial_prefixes->length(); i++) {
692 oop str = trivial_prefixes->obj_at(i);
693 if (str == NULL) {
694 THROW(vmSymbols::java_lang_NullPointerException());
695 } else {
696 prefixes[i] = strdup(java_lang_String::as_utf8_string(str));
697 }
698 }
699 _trivial_prefixes = prefixes;
700 _trivial_prefixes_count = trivial_prefixes->length();
701 }
702 int adjustment = HotSpotJVMCIRuntime::compilationLevelAdjustment(result);
703 assert(adjustment >= JVMCIRuntime::none &&
704 adjustment <= JVMCIRuntime::by_full_signature,
705 "compilation level adjustment out of bounds");
706 _comp_level_adjustment = (CompLevelAdjustment) adjustment;
707 _HotSpotJVMCIRuntime_initialized = true;
708 _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result);
709 }
710
711 void JVMCIRuntime::initialize_JVMCI(TRAPS) {
712 if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
713 callStatic("jdk/vm/ci/runtime/JVMCI",
714 "getRuntime",
715 "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK);
716 }
717 assert(_HotSpotJVMCIRuntime_initialized == true, "what?");
718 }
719
720 bool JVMCIRuntime::can_initialize_JVMCI() {
721 // Initializing JVMCI requires the module system to be initialized past phase 3.
722 // The JVMCI API itself isn't available until phase 2 and ServiceLoader (which
723 // JVMCI initialization requires) isn't usable until after phase 3. Testing
724 // whether the system loader is initialized satisfies all these invariants.
725 if (SystemDictionary::java_system_loader() == NULL) {
726 return false;
727 }
728 assert(Universe::is_module_initialized(), "must be");
729 return true;
730 }
731
732 void JVMCIRuntime::initialize_well_known_classes(TRAPS) {
733 if (JVMCIRuntime::_well_known_classes_initialized == false) {
734 guarantee(can_initialize_JVMCI(), "VM is not yet sufficiently booted to initialize JVMCI");
735 SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;
736 SystemDictionary::initialize_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);
737 JVMCIJavaClasses::compute_offsets(CHECK);
738 JVMCIRuntime::_well_known_classes_initialized = true;
739 }
740 }
741
742 void JVMCIRuntime::metadata_do(void f(Metadata*)) {
743 // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in
744 // the SystemDictionary well known classes should ensure the other
745 // classes have already been loaded, so make sure their order in the
746 // table enforces that.
747 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <
748 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
749 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <
750 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
751 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <
752 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
753
754 if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||
755 !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {
756 // Nothing could be registered yet
757 return;
758 }
759
760 // WeakReference<HotSpotJVMCIMetaAccessContext>[]
761 objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();
762 if (allContexts == NULL) {
763 return;
764 }
765
766 // These must be loaded at this point but the linking state doesn't matter.
767 assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");
768 assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");
769 assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");
770
771 for (int i = 0; i < allContexts->length(); i++) {
772 oop ref = allContexts->obj_at(i);
773 if (ref != NULL) {
774 oop referent = java_lang_ref_Reference::referent(ref);
775 if (referent != NULL) {
776 // Chunked Object[] with last element pointing to next chunk
777 objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);
778 while (metadataRoots != NULL) {
779 for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {
780 oop reference = metadataRoots->obj_at(typeIndex);
781 if (reference == NULL) {
782 continue;
783 }
784 oop metadataRoot = java_lang_ref_Reference::referent(reference);
785 if (metadataRoot == NULL) {
786 continue;
787 }
788 if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {
789 Method* method = CompilerToVM::asMethod(metadataRoot);
790 f(method);
791 } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {
792 ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);
793 f(constantPool);
794 } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {
795 Klass* klass = CompilerToVM::asKlass(metadataRoot);
796 f(klass);
797 } else {
798 metadataRoot->print();
799 ShouldNotReachHere();
800 }
801 }
802 metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);
803 assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");
804 }
805 }
806 }
807 }
808 }
809
810 // private static void CompilerToVM.registerNatives()
811 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
812 if (!EnableJVMCI) {
813 THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");
814 }
815
816 #ifdef _LP64
817 #ifndef SPARC
818 uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();
819 uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;
820 guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");
821 #endif // !SPARC
822 #else
823 fatal("check TLAB allocation code for address space conflicts");
824 #endif // _LP64
825
826 JVMCIRuntime::initialize_well_known_classes(CHECK);
827
828 {
829 ThreadToNativeFromVM trans(thread);
830 env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());
831 }
832 JVM_END
833
834 void JVMCIRuntime::shutdown(TRAPS) {
835 if (_HotSpotJVMCIRuntime_instance != NULL) {
836 _shutdown_called = true;
837 HandleMark hm(THREAD);
838 Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
839 JavaValue result(T_VOID);
840 JavaCallArguments args;
841 args.push_oop(receiver);
842 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
843 }
844 }
845
846 CompLevel JVMCIRuntime::adjust_comp_level_inner(const methodHandle& method, bool is_osr, CompLevel level, JavaThread* thread) {
847 JVMCICompiler* compiler = JVMCICompiler::instance(false, thread);
848 if (compiler != NULL && compiler->is_bootstrapping()) {
849 return level;
850 }
851 if (!is_HotSpotJVMCIRuntime_initialized() || _comp_level_adjustment == JVMCIRuntime::none) {
852 // JVMCI cannot participate in compilation scheduling until
853 // JVMCI is initialized and indicates it wants to participate.
854 return level;
855 }
856
857 #define CHECK_RETURN THREAD); \
858 if (HAS_PENDING_EXCEPTION) { \
859 Handle exception(THREAD, PENDING_EXCEPTION); \
860 CLEAR_PENDING_EXCEPTION; \
861 \
862 if (exception->is_a(SystemDictionary::ThreadDeath_klass())) { \
863 /* In the special case of ThreadDeath, we need to reset the */ \
864 /* pending async exception so that it is propagated. */ \
865 thread->set_pending_async_exception(exception()); \
866 return level; \
867 } \
868 tty->print("Uncaught exception while adjusting compilation level: "); \
869 java_lang_Throwable::print(exception(), tty); \
870 tty->cr(); \
871 java_lang_Throwable::print_stack_trace(exception, tty); \
872 if (HAS_PENDING_EXCEPTION) { \
873 CLEAR_PENDING_EXCEPTION; \
874 } \
875 return level; \
876 } \
877 (void)(0
878
879
880 Thread* THREAD = thread;
881 HandleMark hm;
882 Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_RETURN);
883 Handle name;
884 Handle sig;
885 if (_comp_level_adjustment == JVMCIRuntime::by_full_signature) {
886 name = java_lang_String::create_from_symbol(method->name(), CHECK_RETURN);
887 sig = java_lang_String::create_from_symbol(method->signature(), CHECK_RETURN);
888 } else {
889 name = Handle();
890 sig = Handle();
891 }
892
893 JavaValue result(T_INT);
894 JavaCallArguments args;
895 args.push_oop(receiver);
896 args.push_oop(Handle(THREAD, method->method_holder()->java_mirror()));
897 args.push_oop(name);
898 args.push_oop(sig);
899 args.push_int(is_osr);
900 args.push_int(level);
901 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::adjustCompilationLevel_name(),
902 vmSymbols::adjustCompilationLevel_signature(), &args, CHECK_RETURN);
903
904 int comp_level = result.get_jint();
905 if (comp_level < CompLevel_none || comp_level > CompLevel_full_optimization) {
906 assert(false, "compilation level out of bounds");
907 return level;
908 }
909 return (CompLevel) comp_level;
910 #undef CHECK_RETURN
911 }
912
913 void JVMCIRuntime::bootstrap_finished(TRAPS) {
914 HandleMark hm(THREAD);
915 Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
916 JavaValue result(T_VOID);
917 JavaCallArguments args;
918 args.push_oop(receiver);
919 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::bootstrapFinished_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
920 }
921
922 bool JVMCIRuntime::treat_as_trivial(Method* method) {
923 if (_HotSpotJVMCIRuntime_initialized) {
924 for (int i = 0; i < _trivial_prefixes_count; i++) {
925 if (method->method_holder()->name()->starts_with(_trivial_prefixes[i])) {
926 return true;
927 }
928 }
929 }
930 return false;
931 }