1 /*
2 * Copyright (c) 2012, 2017, 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 "compiler/compileBroker.hpp"
30 #include "compiler/disassembler.hpp"
31 #include "jvmci/jvmciRuntime.hpp"
32 #include "jvmci/jvmciCompilerToVM.hpp"
33 #include "jvmci/jvmciCompiler.hpp"
34 #include "jvmci/jvmciJavaClasses.hpp"
35 #include "jvmci/jvmciEnv.hpp"
36 #include "logging/log.hpp"
37 #include "memory/oopFactory.hpp"
38 #include "memory/resourceArea.hpp"
39 #include "oops/oop.inline.hpp"
40 #include "oops/objArrayOop.inline.hpp"
41 #include "runtime/biasedLocking.hpp"
42 #include "runtime/interfaceSupport.hpp"
43 #include "runtime/reflection.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "utilities/debug.hpp"
46 #include "utilities/defaultStream.hpp"
47 #include "utilities/macros.hpp"
48
49 #if defined(_MSC_VER)
50 #define strtoll _strtoi64
51 #endif
52
53 jobject JVMCIRuntime::_HotSpotJVMCIRuntime_instance = NULL;
54 bool JVMCIRuntime::_HotSpotJVMCIRuntime_initialized = false;
55 bool JVMCIRuntime::_well_known_classes_initialized = false;
56 int JVMCIRuntime::_trivial_prefixes_count = 0;
57 char** JVMCIRuntime::_trivial_prefixes = NULL;
58 JVMCIRuntime::CompLevelAdjustment JVMCIRuntime::_comp_level_adjustment = JVMCIRuntime::none;
59 bool JVMCIRuntime::_shutdown_called = false;
60
61 BasicType JVMCIRuntime::kindToBasicType(Handle kind, TRAPS) {
62 if (kind.is_null()) {
63 THROW_(vmSymbols::java_lang_NullPointerException(), T_ILLEGAL);
64 }
65 jchar ch = JavaKind::typeChar(kind);
66 switch(ch) {
67 case 'Z': return T_BOOLEAN;
68 case 'B': return T_BYTE;
69 case 'S': return T_SHORT;
70 case 'C': return T_CHAR;
71 case 'I': return T_INT;
72 case 'F': return T_FLOAT;
73 case 'J': return T_LONG;
74 case 'D': return T_DOUBLE;
75 case 'A': return T_OBJECT;
76 case '-': return T_ILLEGAL;
77 default:
78 JVMCI_ERROR_(T_ILLEGAL, "unexpected Kind: %c", ch);
79 }
80 }
81
82 // Simple helper to see if the caller of a runtime stub which
83 // entered the VM has been deoptimized
84
85 static bool caller_is_deopted() {
86 JavaThread* thread = JavaThread::current();
87 RegisterMap reg_map(thread, false);
88 frame runtime_frame = thread->last_frame();
89 frame caller_frame = runtime_frame.sender(®_map);
90 assert(caller_frame.is_compiled_frame(), "must be compiled");
91 return caller_frame.is_deoptimized_frame();
92 }
93
94 // Stress deoptimization
95 static void deopt_caller() {
96 if ( !caller_is_deopted()) {
97 JavaThread* thread = JavaThread::current();
98 RegisterMap reg_map(thread, false);
99 frame runtime_frame = thread->last_frame();
100 frame caller_frame = runtime_frame.sender(®_map);
101 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
102 assert(caller_is_deopted(), "Must be deoptimized");
103 }
104 }
105
106 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass))
107 JRT_BLOCK;
108 assert(klass->is_klass(), "not a class");
109 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
110 InstanceKlass* ik = InstanceKlass::cast(klass);
111 ik->check_valid_for_instantiation(true, CHECK);
112 // make sure klass is initialized
113 ik->initialize(CHECK);
114 // allocate instance and return via TLS
115 oop obj = ik->allocate_instance(CHECK);
116 thread->set_vm_result(obj);
117 JRT_BLOCK_END;
118
119 if (ReduceInitialCardMarks) {
120 new_store_pre_barrier(thread);
121 }
122 JRT_END
123
124 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length))
125 JRT_BLOCK;
126 // Note: no handle for klass needed since they are not used
127 // anymore after new_objArray() and no GC can happen before.
128 // (This may have to change if this code changes!)
129 assert(array_klass->is_klass(), "not a class");
130 oop obj;
131 if (array_klass->is_typeArray_klass()) {
132 BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
133 obj = oopFactory::new_typeArray(elt_type, length, CHECK);
134 } else {
135 Handle holder(THREAD, array_klass->klass_holder()); // keep the klass alive
136 Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
137 obj = oopFactory::new_objArray(elem_klass, length, CHECK);
138 }
139 thread->set_vm_result(obj);
140 // This is pretty rare but this runtime patch is stressful to deoptimization
141 // if we deoptimize here so force a deopt to stress the path.
142 if (DeoptimizeALot) {
143 static int deopts = 0;
144 // Alternate between deoptimizing and raising an error (which will also cause a deopt)
145 if (deopts++ % 2 == 0) {
146 ResourceMark rm(THREAD);
147 THROW(vmSymbols::java_lang_OutOfMemoryError());
148 } else {
149 deopt_caller();
150 }
151 }
152 JRT_BLOCK_END;
153
154 if (ReduceInitialCardMarks) {
155 new_store_pre_barrier(thread);
156 }
157 JRT_END
158
159 void JVMCIRuntime::new_store_pre_barrier(JavaThread* thread) {
160 // After any safepoint, just before going back to compiled code,
161 // we inform the GC that we will be doing initializing writes to
162 // this object in the future without emitting card-marks, so
163 // GC may take any compensating steps.
164 // NOTE: Keep this code consistent with GraphKit::store_barrier.
165
166 oop new_obj = thread->vm_result();
167 if (new_obj == NULL) return;
168
169 assert(Universe::heap()->can_elide_tlab_store_barriers(),
170 "compiler must check this first");
171 // GC may decide to give back a safer copy of new_obj.
172 new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
173 thread->set_vm_result(new_obj);
174 }
175
176 JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))
177 assert(klass->is_klass(), "not a class");
178 assert(rank >= 1, "rank must be nonzero");
179 Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
180 oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
181 thread->set_vm_result(obj);
182 JRT_END
183
184 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length))
185 oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
186 thread->set_vm_result(obj);
187 JRT_END
188
189 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror))
190 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(type_mirror));
191
192 if (klass == NULL) {
193 ResourceMark rm(THREAD);
194 THROW(vmSymbols::java_lang_InstantiationException());
195 }
196
197 // Create new instance (the receiver)
198 klass->check_valid_for_instantiation(false, CHECK);
199
200 // Make sure klass gets initialized
201 klass->initialize(CHECK);
202
203 oop obj = klass->allocate_instance(CHECK);
204 thread->set_vm_result(obj);
205 JRT_END
206
207 extern void vm_exit(int code);
208
209 // Enter this method from compiled code handler below. This is where we transition
210 // to VM mode. This is done as a helper routine so that the method called directly
211 // from compiled code does not have to transition to VM. This allows the entry
212 // method to see if the nmethod that we have just looked up a handler for has
213 // been deoptimized while we were in the vm. This simplifies the assembly code
214 // cpu directories.
215 //
216 // We are entering here from exception stub (via the entry method below)
217 // If there is a compiled exception handler in this method, we will continue there;
218 // otherwise we will unwind the stack and continue at the caller of top frame method
219 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
220 // control the area where we can allow a safepoint. After we exit the safepoint area we can
221 // check to see if the handler we are going to return is now in a nmethod that has
222 // been deoptimized. If that is the case we return the deopt blob
223 // unpack_with_exception entry instead. This makes life for the exception blob easier
224 // because making that same check and diverting is painful from assembly language.
225 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, CompiledMethod*& cm))
226 // Reset method handle flag.
227 thread->set_is_method_handle_return(false);
228
229 Handle exception(thread, ex);
230 cm = CodeCache::find_compiled(pc);
231 assert(cm != NULL, "this is not a compiled method");
232 // Adjust the pc as needed/
233 if (cm->is_deopt_pc(pc)) {
234 RegisterMap map(thread, false);
235 frame exception_frame = thread->last_frame().sender(&map);
236 // if the frame isn't deopted then pc must not correspond to the caller of last_frame
237 assert(exception_frame.is_deoptimized_frame(), "must be deopted");
238 pc = exception_frame.pc();
239 }
240 #ifdef ASSERT
241 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
242 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
243 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
244 if (ExitVMOnVerifyError) vm_exit(-1);
245 ShouldNotReachHere();
246 }
247 #endif
248
249 // Check the stack guard pages and reenable them if necessary and there is
250 // enough space on the stack to do so. Use fast exceptions only if the guard
251 // pages are enabled.
252 bool guard_pages_enabled = thread->stack_guards_enabled();
253 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
254
255 if (JvmtiExport::can_post_on_exceptions()) {
256 // To ensure correct notification of exception catches and throws
257 // we have to deoptimize here. If we attempted to notify the
258 // catches and throws during this exception lookup it's possible
259 // we could deoptimize on the way out of the VM and end back in
260 // the interpreter at the throw site. This would result in double
261 // notifications since the interpreter would also notify about
262 // these same catches and throws as it unwound the frame.
263
264 RegisterMap reg_map(thread);
265 frame stub_frame = thread->last_frame();
266 frame caller_frame = stub_frame.sender(®_map);
267
268 // We don't really want to deoptimize the nmethod itself since we
269 // can actually continue in the exception handler ourselves but I
270 // don't see an easy way to have the desired effect.
271 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
272 assert(caller_is_deopted(), "Must be deoptimized");
273
274 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
275 }
276
277 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
278 if (guard_pages_enabled) {
279 address fast_continuation = cm->handler_for_exception_and_pc(exception, pc);
280 if (fast_continuation != NULL) {
281 // Set flag if return address is a method handle call site.
282 thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
283 return fast_continuation;
284 }
285 }
286
287 // If the stack guard pages are enabled, check whether there is a handler in
288 // the current method. Otherwise (guard pages disabled), force an unwind and
289 // skip the exception cache update (i.e., just leave continuation==NULL).
290 address continuation = NULL;
291 if (guard_pages_enabled) {
292
293 // New exception handling mechanism can support inlined methods
294 // with exception handlers since the mappings are from PC to PC
295
296 // debugging support
297 // tracing
298 if (log_is_enabled(Info, exceptions)) {
299 ResourceMark rm;
300 stringStream tempst;
301 tempst.print("compiled method <%s>\n"
302 " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT,
303 cm->method()->print_value_string(), p2i(pc), p2i(thread));
304 Exceptions::log_exception(exception, tempst);
305 }
306 // for AbortVMOnException flag
307 NOT_PRODUCT(Exceptions::debug_check_abort(exception));
308
309 // Clear out the exception oop and pc since looking up an
310 // exception handler can cause class loading, which might throw an
311 // exception and those fields are expected to be clear during
312 // normal bytecode execution.
313 thread->clear_exception_oop_and_pc();
314
315 bool recursive_exception = false;
316 continuation = SharedRuntime::compute_compiled_exc_handler(cm, pc, exception, false, false, recursive_exception);
317 // If an exception was thrown during exception dispatch, the exception oop may have changed
318 thread->set_exception_oop(exception());
319 thread->set_exception_pc(pc);
320
321 // the exception cache is used only by non-implicit exceptions
322 // Update the exception cache only when there didn't happen
323 // another exception during the computation of the compiled
324 // exception handler. Checking for exception oop equality is not
325 // sufficient because some exceptions are pre-allocated and reused.
326 if (continuation != NULL && !recursive_exception && !SharedRuntime::deopt_blob()->contains(continuation)) {
327 cm->add_handler_for_exception_and_pc(exception, pc, continuation);
328 }
329 }
330
331 // Set flag if return address is a method handle call site.
332 thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
333
334 if (log_is_enabled(Info, exceptions)) {
335 ResourceMark rm;
336 log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
337 " for exception thrown at PC " PTR_FORMAT,
338 p2i(thread), p2i(continuation), p2i(pc));
339 }
340
341 return continuation;
342 JRT_END
343
344 // Enter this method from compiled code only if there is a Java exception handler
345 // in the method handling the exception.
346 // We are entering here from exception stub. We don't do a normal VM transition here.
347 // We do it in a helper. This is so we can check to see if the nmethod we have just
348 // searched for an exception handler has been deoptimized in the meantime.
349 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
350 oop exception = thread->exception_oop();
351 address pc = thread->exception_pc();
352 // Still in Java mode
353 DEBUG_ONLY(ResetNoHandleMark rnhm);
354 CompiledMethod* cm = NULL;
355 address continuation = NULL;
356 {
357 // Enter VM mode by calling the helper
358 ResetNoHandleMark rnhm;
359 continuation = exception_handler_for_pc_helper(thread, exception, pc, cm);
360 }
361 // Back in JAVA, use no oops DON'T safepoint
362
363 // Now check to see if the compiled method we were called from is now deoptimized.
364 // If so we must return to the deopt blob and deoptimize the nmethod
365 if (cm != NULL && caller_is_deopted()) {
366 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
367 }
368
369 assert(continuation != NULL, "no handler found");
370 return continuation;
371 }
372
373 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
374 IF_TRACE_jvmci_3 {
375 char type[O_BUFLEN];
376 obj->klass()->name()->as_C_string(type, O_BUFLEN);
377 markOop mark = obj->mark();
378 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));
379 tty->flush();
380 }
381 #ifdef ASSERT
382 if (PrintBiasedLockingStatistics) {
383 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
384 }
385 #endif
386 Handle h_obj(thread, obj);
387 if (UseBiasedLocking) {
388 // Retry fast entry if bias is revoked to avoid unnecessary inflation
389 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK);
390 } else {
391 if (JVMCIUseFastLocking) {
392 // When using fast locking, the compiled code has already tried the fast case
393 ObjectSynchronizer::slow_enter(h_obj, lock, THREAD);
394 } else {
395 ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD);
396 }
397 }
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 DEBUG
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 if (JVMCIUseFastLocking) {
420 // When using fast locking, the compiled code has already tried the fast case
421 ObjectSynchronizer::slow_exit(obj, lock, THREAD);
422 } else {
423 ObjectSynchronizer::fast_exit(obj, lock, THREAD);
424 }
425 IF_TRACE_jvmci_3 {
426 char type[O_BUFLEN];
427 obj->klass()->name()->as_C_string(type, O_BUFLEN);
428 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));
429 tty->flush();
430 }
431 JRT_END
432
433 JRT_ENTRY(void, JVMCIRuntime::throw_and_post_jvmti_exception(JavaThread* thread, const char* exception, const char* message))
434 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
435 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
436 JRT_END
437
438 JRT_ENTRY(void, JVMCIRuntime::throw_klass_external_name_exception(JavaThread* thread, const char* exception, Klass* klass))
439 ResourceMark rm(thread);
440 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
441 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, klass->external_name());
442 JRT_END
443
444 JRT_ENTRY(void, JVMCIRuntime::throw_class_cast_exception(JavaThread* thread, const char* exception, Klass* caster_klass, Klass* target_klass))
445 ResourceMark rm(thread);
446 const char* message = SharedRuntime::generate_class_cast_message(caster_klass, target_klass);
447 TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
448 SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
449 JRT_END
450
451 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
452 ttyLocker ttyl;
453
454 if (obj == NULL) {
455 tty->print("NULL");
456 } else if (oopDesc::is_oop_or_null(obj, true) && (!as_string || !java_lang_String::is_instance(obj))) {
457 if (oopDesc::is_oop_or_null(obj, true)) {
458 char buf[O_BUFLEN];
459 tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
460 } else {
461 tty->print(INTPTR_FORMAT, p2i(obj));
462 }
463 } else {
464 ResourceMark rm;
465 assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
466 char *buf = java_lang_String::as_utf8_string(obj);
467 tty->print_raw(buf);
468 }
469 if (newline) {
470 tty->cr();
471 }
472 JRT_END
473
474 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
475 thread->satb_mark_queue().enqueue(obj);
476 JRT_END
477
478 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
479 thread->dirty_card_queue().enqueue(card_addr);
480 JRT_END
481
482 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
483 bool ret = true;
484 if(!Universe::heap()->is_in_closed_subset(parent)) {
485 tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
486 parent->print();
487 ret=false;
488 }
489 if(!Universe::heap()->is_in_closed_subset(child)) {
490 tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
491 child->print();
492 ret=false;
493 }
494 return (jint)ret;
495 JRT_END
496
497 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
498 ResourceMark rm;
499 const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
500 char *detail_msg = NULL;
501 if (format != 0L) {
502 const char* buf = (char*) (address) format;
503 size_t detail_msg_length = strlen(buf) * 2;
504 detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
505 jio_snprintf(detail_msg, detail_msg_length, buf, value);
506 report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
507 } else {
508 report_vm_error(__FILE__, __LINE__, error_msg);
509 }
510 JRT_END
511
512 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
513 oop exception = thread->exception_oop();
514 assert(exception != NULL, "npe");
515 thread->set_exception_oop(NULL);
516 thread->set_exception_pc(0);
517 return exception;
518 JRT_END
519
520 PRAGMA_DIAG_PUSH
521 PRAGMA_FORMAT_NONLITERAL_IGNORED
522 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, oopDesc* format, jlong v1, jlong v2, jlong v3))
523 ResourceMark rm;
524 assert(format != NULL && java_lang_String::is_instance(format), "must be");
525 char *buf = java_lang_String::as_utf8_string(format);
526 tty->print((const char*)buf, v1, v2, v3);
527 JRT_END
528 PRAGMA_DIAG_POP
529
530 static void decipher(jlong v, bool ignoreZero) {
531 if (v != 0 || !ignoreZero) {
532 void* p = (void *)(address) v;
533 CodeBlob* cb = CodeCache::find_blob(p);
534 if (cb) {
535 if (cb->is_nmethod()) {
536 char buf[O_BUFLEN];
537 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()));
538 return;
539 }
540 cb->print_value_on(tty);
541 return;
542 }
543 if (Universe::heap()->is_in(p)) {
544 oop obj = oop(p);
545 obj->print_value_on(tty);
546 return;
547 }
548 tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
549 }
550 }
551
552 PRAGMA_DIAG_PUSH
553 PRAGMA_FORMAT_NONLITERAL_IGNORED
554 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
555 ResourceMark rm;
556 const char *buf = (const char*) (address) format;
557 if (vmError) {
558 if (buf != NULL) {
559 fatal(buf, v1, v2, v3);
560 } else {
561 fatal("<anonymous error>");
562 }
563 } else if (buf != NULL) {
564 tty->print(buf, v1, v2, v3);
565 } else {
566 assert(v2 == 0, "v2 != 0");
567 assert(v3 == 0, "v3 != 0");
568 decipher(v1, false);
569 }
570 JRT_END
571 PRAGMA_DIAG_POP
572
573 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
574 union {
575 jlong l;
576 jdouble d;
577 jfloat f;
578 } uu;
579 uu.l = value;
580 switch (typeChar) {
581 case 'Z': tty->print(value == 0 ? "false" : "true"); break;
582 case 'B': tty->print("%d", (jbyte) value); break;
583 case 'C': tty->print("%c", (jchar) value); break;
584 case 'S': tty->print("%d", (jshort) value); break;
585 case 'I': tty->print("%d", (jint) value); break;
586 case 'F': tty->print("%f", uu.f); break;
587 case 'J': tty->print(JLONG_FORMAT, value); break;
588 case 'D': tty->print("%lf", uu.d); break;
589 default: assert(false, "unknown typeChar"); break;
590 }
591 if (newline) {
592 tty->cr();
593 }
594 JRT_END
595
596 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
597 return (jint) obj->identity_hash();
598 JRT_END
599
600 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted))
601 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
602 // This locking requires thread_in_vm which is why this method cannot be JRT_LEAF.
603 Handle receiverHandle(thread, receiver);
604 MutexLockerEx ml(thread->threadObj() == (void*)receiver ? NULL : Threads_lock);
605 JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle());
606 if (receiverThread == NULL) {
607 // The other thread may exit during this process, which is ok so return false.
608 return JNI_FALSE;
609 } else {
610 return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0);
611 }
612 JRT_END
613
614 JRT_ENTRY(int, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
615 deopt_caller();
616 return value;
617 JRT_END
618
619 void JVMCIRuntime::force_initialization(TRAPS) {
620 JVMCIRuntime::initialize_well_known_classes(CHECK);
621
622 ResourceMark rm;
623 TempNewSymbol getCompiler = SymbolTable::new_symbol("getCompiler", CHECK);
624 TempNewSymbol sig = SymbolTable::new_symbol("()Ljdk/vm/ci/runtime/JVMCICompiler;", CHECK);
625 Handle jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK);
626 JavaValue result(T_OBJECT);
627 JavaCalls::call_virtual(&result, jvmciRuntime, HotSpotJVMCIRuntime::klass(), getCompiler, sig, CHECK);
628 }
629
630 // private static JVMCIRuntime JVMCI.initializeRuntime()
631 JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
632 if (!EnableJVMCI) {
633 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")
634 }
635 JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL);
636 jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL);
637 return ret;
638 JVM_END
639
640 Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) {
641 TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle()));
642 Klass* klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle()));
643 TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle()));
644 TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle()));
645 JavaValue result(T_OBJECT);
646 if (args == NULL) {
647 JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle()));
648 } else {
649 JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle()));
650 }
651 return Handle(THREAD, (oop)result.get_jobject());
652 }
653
654 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {
655 guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime");
656 JVMCIRuntime::initialize_well_known_classes(CHECK);
657 // This should only be called in the context of the JVMCI class being initialized
658 InstanceKlass* klass = SystemDictionary::JVMCI_klass();
659 guarantee(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),
660 "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");
661
662 Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",
663 "runtime",
664 "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);
665 objArrayOop trivial_prefixes = HotSpotJVMCIRuntime::trivialPrefixes(result);
666 if (trivial_prefixes != NULL) {
667 char** prefixes = NEW_C_HEAP_ARRAY(char*, trivial_prefixes->length(), mtCompiler);
668 for (int i = 0; i < trivial_prefixes->length(); i++) {
669 oop str = trivial_prefixes->obj_at(i);
670 if (str == NULL) {
671 THROW(vmSymbols::java_lang_NullPointerException());
672 } else {
673 prefixes[i] = strdup(java_lang_String::as_utf8_string(str));
674 }
675 }
676 _trivial_prefixes = prefixes;
677 _trivial_prefixes_count = trivial_prefixes->length();
678 }
679 int adjustment = HotSpotJVMCIRuntime::compilationLevelAdjustment(result);
680 assert(adjustment >= JVMCIRuntime::none &&
681 adjustment <= JVMCIRuntime::by_full_signature,
682 "compilation level adjustment out of bounds");
683 _comp_level_adjustment = (CompLevelAdjustment) adjustment;
684 _HotSpotJVMCIRuntime_initialized = true;
685 _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result);
686 }
687
688 void JVMCIRuntime::initialize_JVMCI(TRAPS) {
689 if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
690 callStatic("jdk/vm/ci/runtime/JVMCI",
691 "getRuntime",
692 "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK);
693 }
694 assert(_HotSpotJVMCIRuntime_initialized == true, "what?");
695 }
696
697 bool JVMCIRuntime::can_initialize_JVMCI() {
698 // Initializing JVMCI requires the module system to be initialized past phase 3.
699 // The JVMCI API itself isn't available until phase 2 and ServiceLoader (which
700 // JVMCI initialization requires) isn't usable until after phase 3. Testing
701 // whether the system loader is initialized satisfies all these invariants.
702 if (SystemDictionary::java_system_loader() == NULL) {
703 return false;
704 }
705 assert(Universe::is_module_initialized(), "must be");
706 return true;
707 }
708
709 void JVMCIRuntime::initialize_well_known_classes(TRAPS) {
710 if (JVMCIRuntime::_well_known_classes_initialized == false) {
711 guarantee(can_initialize_JVMCI(), "VM is not yet sufficiently booted to initialize JVMCI");
712 SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;
713 SystemDictionary::initialize_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);
714 JVMCIJavaClasses::compute_offsets(CHECK);
715 JVMCIRuntime::_well_known_classes_initialized = true;
716 }
717 }
718
719 void JVMCIRuntime::metadata_do(void f(Metadata*)) {
720 // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in
721 // the SystemDictionary well known classes should ensure the other
722 // classes have already been loaded, so make sure their order in the
723 // table enforces that.
724 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <
725 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
726 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <
727 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
728 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <
729 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
730
731 if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||
732 !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {
733 // Nothing could be registered yet
734 return;
735 }
736
737 // WeakReference<HotSpotJVMCIMetaAccessContext>[]
738 objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();
739 if (allContexts == NULL) {
740 return;
741 }
742
743 // These must be loaded at this point but the linking state doesn't matter.
744 assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");
745 assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");
746 assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");
747
748 for (int i = 0; i < allContexts->length(); i++) {
749 oop ref = allContexts->obj_at(i);
750 if (ref != NULL) {
751 oop referent = java_lang_ref_Reference::referent(ref);
752 if (referent != NULL) {
753 // Chunked Object[] with last element pointing to next chunk
754 objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);
755 while (metadataRoots != NULL) {
756 for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {
757 oop reference = metadataRoots->obj_at(typeIndex);
758 if (reference == NULL) {
759 continue;
760 }
761 oop metadataRoot = java_lang_ref_Reference::referent(reference);
762 if (metadataRoot == NULL) {
763 continue;
764 }
765 if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {
766 Method* method = CompilerToVM::asMethod(metadataRoot);
767 f(method);
768 } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {
769 ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);
770 f(constantPool);
771 } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {
772 Klass* klass = CompilerToVM::asKlass(metadataRoot);
773 f(klass);
774 } else {
775 metadataRoot->print();
776 ShouldNotReachHere();
777 }
778 }
779 metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);
780 assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");
781 }
782 }
783 }
784 }
785 }
786
787 // private static void CompilerToVM.registerNatives()
788 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
789 if (!EnableJVMCI) {
790 THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");
791 }
792
793 #ifdef _LP64
794 #ifndef SPARC
795 uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();
796 uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;
797 guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");
798 #endif // !SPARC
799 #else
800 fatal("check TLAB allocation code for address space conflicts");
801 #endif // _LP64
802
803 JVMCIRuntime::initialize_well_known_classes(CHECK);
804
805 {
806 ThreadToNativeFromVM trans(thread);
807 env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());
808 }
809 JVM_END
810
811 void JVMCIRuntime::shutdown(TRAPS) {
812 if (_HotSpotJVMCIRuntime_instance != NULL) {
813 _shutdown_called = true;
814 HandleMark hm(THREAD);
815 Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
816 JavaValue result(T_VOID);
817 JavaCallArguments args;
818 args.push_oop(receiver);
819 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
820 }
821 }
822
823 CompLevel JVMCIRuntime::adjust_comp_level_inner(const methodHandle& method, bool is_osr, CompLevel level, JavaThread* thread) {
824 JVMCICompiler* compiler = JVMCICompiler::instance(false, thread);
825 if (compiler != NULL && compiler->is_bootstrapping()) {
826 return level;
827 }
828 if (!is_HotSpotJVMCIRuntime_initialized() || _comp_level_adjustment == JVMCIRuntime::none) {
829 // JVMCI cannot participate in compilation scheduling until
830 // JVMCI is initialized and indicates it wants to participate.
831 return level;
832 }
833
834 #define CHECK_RETURN THREAD); \
835 if (HAS_PENDING_EXCEPTION) { \
836 Handle exception(THREAD, PENDING_EXCEPTION); \
837 CLEAR_PENDING_EXCEPTION; \
838 \
839 if (exception->is_a(SystemDictionary::ThreadDeath_klass())) { \
840 /* In the special case of ThreadDeath, we need to reset the */ \
841 /* pending async exception so that it is propagated. */ \
842 thread->set_pending_async_exception(exception()); \
843 return level; \
844 } \
845 tty->print("Uncaught exception while adjusting compilation level: "); \
846 java_lang_Throwable::print(exception(), tty); \
847 tty->cr(); \
848 java_lang_Throwable::print_stack_trace(exception, tty); \
849 if (HAS_PENDING_EXCEPTION) { \
850 CLEAR_PENDING_EXCEPTION; \
851 } \
852 return level; \
853 } \
854 (void)(0
855
856
857 Thread* THREAD = thread;
858 HandleMark hm;
859 Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_RETURN);
860 Handle name;
861 Handle sig;
862 if (_comp_level_adjustment == JVMCIRuntime::by_full_signature) {
863 name = java_lang_String::create_from_symbol(method->name(), CHECK_RETURN);
864 sig = java_lang_String::create_from_symbol(method->signature(), CHECK_RETURN);
865 } else {
866 name = Handle();
867 sig = Handle();
868 }
869
870 JavaValue result(T_INT);
871 JavaCallArguments args;
872 args.push_oop(receiver);
873 args.push_oop(Handle(THREAD, method->method_holder()->java_mirror()));
874 args.push_oop(name);
875 args.push_oop(sig);
876 args.push_int(is_osr);
877 args.push_int(level);
878 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::adjustCompilationLevel_name(),
879 vmSymbols::adjustCompilationLevel_signature(), &args, CHECK_RETURN);
880
881 int comp_level = result.get_jint();
882 if (comp_level < CompLevel_none || comp_level > CompLevel_full_optimization) {
883 assert(false, "compilation level out of bounds");
884 return level;
885 }
886 return (CompLevel) comp_level;
887 #undef CHECK_RETURN
888 }
889
890 void JVMCIRuntime::bootstrap_finished(TRAPS) {
891 HandleMark hm(THREAD);
892 Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
893 JavaValue result(T_VOID);
894 JavaCallArguments args;
895 args.push_oop(receiver);
896 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::bootstrapFinished_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
897 }
898
899 bool JVMCIRuntime::treat_as_trivial(Method* method) {
900 if (_HotSpotJVMCIRuntime_initialized) {
901 for (int i = 0; i < _trivial_prefixes_count; i++) {
902 if (method->method_holder()->name()->starts_with(_trivial_prefixes[i])) {
903 return true;
904 }
905 }
906 }
907 return false;
908 }