1 /*
2 * Copyright (c) 1997, 2015, 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
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.inline.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "code/codeCacheExtensions.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc/shared/collectedHeap.hpp"
34 #include "interpreter/interpreter.hpp"
35 #include "interpreter/interpreterRuntime.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "interpreter/templateTable.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/universe.inline.hpp"
40 #include "oops/constantPool.hpp"
41 #include "oops/instanceKlass.hpp"
42 #include "oops/methodData.hpp"
43 #include "oops/objArrayKlass.hpp"
44 #include "oops/objArrayOop.inline.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "oops/symbol.hpp"
47 #include "prims/jvmtiExport.hpp"
48 #include "prims/nativeLookup.hpp"
49 #include "runtime/atomic.inline.hpp"
50 #include "runtime/biasedLocking.hpp"
51 #include "runtime/compilationPolicy.hpp"
52 #include "runtime/deoptimization.hpp"
53 #include "runtime/fieldDescriptor.hpp"
54 #include "runtime/handles.inline.hpp"
55 #include "runtime/icache.hpp"
56 #include "runtime/interfaceSupport.hpp"
57 #include "runtime/java.hpp"
58 #include "runtime/jfieldIDWorkaround.hpp"
59 #include "runtime/osThread.hpp"
60 #include "runtime/sharedRuntime.hpp"
61 #include "runtime/stubRoutines.hpp"
62 #include "runtime/synchronizer.hpp"
63 #include "runtime/threadCritical.hpp"
64 #include "utilities/events.hpp"
65 #ifdef COMPILER2
66 #include "opto/runtime.hpp"
67 #endif
68
69 class UnlockFlagSaver {
70 private:
71 JavaThread* _thread;
72 bool _do_not_unlock;
73 public:
74 UnlockFlagSaver(JavaThread* t) {
75 _thread = t;
76 _do_not_unlock = t->do_not_unlock_if_synchronized();
77 t->set_do_not_unlock_if_synchronized(false);
78 }
79 ~UnlockFlagSaver() {
80 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
81 }
82 };
83
84 //------------------------------------------------------------------------------------------------------------------------
85 // State accessors
86
87 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
88 last_frame(thread).interpreter_frame_set_bcp(bcp);
89 if (ProfileInterpreter) {
90 // ProfileTraps uses MDOs independently of ProfileInterpreter.
91 // That is why we must check both ProfileInterpreter and mdo != NULL.
92 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
93 if (mdo != NULL) {
94 NEEDS_CLEANUP;
95 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
96 }
97 }
98 }
99
100 //------------------------------------------------------------------------------------------------------------------------
101 // Constants
102
103
104 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
105 // access constant pool
106 ConstantPool* pool = method(thread)->constants();
107 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
108 constantTag tag = pool->tag_at(index);
109
110 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
111 Klass* klass = pool->klass_at(index, CHECK);
112 oop java_class = klass->java_mirror();
113 thread->set_vm_result(java_class);
114 IRT_END
115
116 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
117 assert(bytecode == Bytecodes::_fast_aldc ||
118 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
119 ResourceMark rm(thread);
120 methodHandle m (thread, method(thread));
121 Bytecode_loadconstant ldc(m, bci(thread));
122 oop result = ldc.resolve_constant(CHECK);
123 #ifdef ASSERT
124 {
125 // The bytecode wrappers aren't GC-safe so construct a new one
126 Bytecode_loadconstant ldc2(m, bci(thread));
127 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
128 assert(result == coop, "expected result for assembly code");
129 }
130 #endif
131 thread->set_vm_result(result);
132 }
133 IRT_END
134
135
136 //------------------------------------------------------------------------------------------------------------------------
137 // Allocation
138
139 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
140 Klass* k_oop = pool->klass_at(index, CHECK);
141 instanceKlassHandle klass (THREAD, k_oop);
142
143 // Make sure we are not instantiating an abstract klass
144 klass->check_valid_for_instantiation(true, CHECK);
145
146 // Make sure klass is initialized
147 klass->initialize(CHECK);
148
149 // At this point the class may not be fully initialized
150 // because of recursive initialization. If it is fully
151 // initialized & has_finalized is not set, we rewrite
152 // it into its fast version (Note: no locking is needed
153 // here since this is an atomic byte write and can be
154 // done more than once).
155 //
156 // Note: In case of classes with has_finalized we don't
157 // rewrite since that saves us an extra check in
158 // the fast version which then would call the
159 // slow version anyway (and do a call back into
160 // Java).
161 // If we have a breakpoint, then we don't rewrite
162 // because the _breakpoint bytecode would be lost.
163 oop obj = klass->allocate_instance(CHECK);
164 thread->set_vm_result(obj);
165 IRT_END
166
167
168 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
169 oop obj = oopFactory::new_typeArray(type, size, CHECK);
170 thread->set_vm_result(obj);
171 IRT_END
172
173
174 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
175 // Note: no oopHandle for pool & klass needed since they are not used
176 // anymore after new_objArray() and no GC can happen before.
177 // (This may have to change if this code changes!)
178 Klass* klass = pool->klass_at(index, CHECK);
179 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
180 thread->set_vm_result(obj);
181 IRT_END
182
183
184 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
185 // We may want to pass in more arguments - could make this slightly faster
186 ConstantPool* constants = method(thread)->constants();
187 int i = get_index_u2(thread, Bytecodes::_multianewarray);
188 Klass* klass = constants->klass_at(i, CHECK);
189 int nof_dims = number_of_dimensions(thread);
190 assert(klass->is_klass(), "not a class");
191 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
192
193 // We must create an array of jints to pass to multi_allocate.
194 ResourceMark rm(thread);
195 const int small_dims = 10;
196 jint dim_array[small_dims];
197 jint *dims = &dim_array[0];
198 if (nof_dims > small_dims) {
199 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
200 }
201 for (int index = 0; index < nof_dims; index++) {
202 // offset from first_size_address is addressed as local[index]
203 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
204 dims[index] = first_size_address[n];
205 }
206 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
207 thread->set_vm_result(obj);
208 IRT_END
209
210
211 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
212 assert(obj->is_oop(), "must be a valid oop");
213 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
214 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
215 IRT_END
216
217
218 // Quicken instance-of and check-cast bytecodes
219 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
220 // Force resolving; quicken the bytecode
221 int which = get_index_u2(thread, Bytecodes::_checkcast);
222 ConstantPool* cpool = method(thread)->constants();
223 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
224 // program we might have seen an unquick'd bytecode in the interpreter but have another
225 // thread quicken the bytecode before we get here.
226 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
227 Klass* klass = cpool->klass_at(which, CHECK);
228 thread->set_vm_result_2(klass);
229 IRT_END
230
231
232 //------------------------------------------------------------------------------------------------------------------------
233 // Exceptions
234
235 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
236 methodHandle trap_method, int trap_bci, TRAPS) {
237 if (trap_method.not_null()) {
238 MethodData* trap_mdo = trap_method->method_data();
239 if (trap_mdo == NULL) {
240 Method::build_interpreter_method_data(trap_method, THREAD);
241 if (HAS_PENDING_EXCEPTION) {
242 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
243 "we expect only an OOM error here");
244 CLEAR_PENDING_EXCEPTION;
245 }
246 trap_mdo = trap_method->method_data();
247 // and fall through...
248 }
249 if (trap_mdo != NULL) {
250 // Update per-method count of trap events. The interpreter
251 // is updating the MDO to simulate the effect of compiler traps.
252 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
253 }
254 }
255 }
256
257 // Assume the compiler is (or will be) interested in this event.
258 // If necessary, create an MDO to hold the information, and record it.
259 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
260 assert(ProfileTraps, "call me only if profiling");
261 methodHandle trap_method(thread, method(thread));
262 int trap_bci = trap_method->bci_from(bcp(thread));
263 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
264 }
265
266 #ifdef CC_INTERP
267 // As legacy note_trap, but we have more arguments.
268 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
269 methodHandle trap_method(method);
270 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
271 IRT_END
272
273 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
274 // for each exception.
275 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
276 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
277 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
278 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
279 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
280 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
281 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
282 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
283 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
284 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
285 #endif // CC_INTERP
286
287
288 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
289 // get klass
290 InstanceKlass* klass = InstanceKlass::cast(k);
291 assert(klass->is_initialized(),
292 "this klass should have been initialized during VM initialization");
293 // create instance - do not call constructor since we may have no
294 // (java) stack space left (should assert constructor is empty)
295 Handle exception;
296 oop exception_oop = klass->allocate_instance(CHECK_(exception));
297 exception = Handle(THREAD, exception_oop);
298 if (StackTraceInThrowable) {
299 java_lang_Throwable::fill_in_stack_trace(exception);
300 }
301 return exception;
302 }
303
304 // Special handling for stack overflow: since we don't have any (java) stack
305 // space left we use the pre-allocated & pre-initialized StackOverflowError
306 // klass to create an stack overflow error instance. We do not call its
307 // constructor for the same reason (it is empty, anyway).
308 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
309 Handle exception = get_preinitialized_exception(
310 SystemDictionary::StackOverflowError_klass(),
311 CHECK);
312 // Increment counter for hs_err file reporting
313 Atomic::inc(&Exceptions::_stack_overflow_errors);
314 THROW_HANDLE(exception);
315 IRT_END
316
317
318 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
319 // lookup exception klass
320 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
321 if (ProfileTraps) {
322 if (s == vmSymbols::java_lang_ArithmeticException()) {
323 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
324 } else if (s == vmSymbols::java_lang_NullPointerException()) {
325 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
326 }
327 }
328 // create exception
329 Handle exception = Exceptions::new_exception(thread, s, message);
330 thread->set_vm_result(exception());
331 IRT_END
332
333
334 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
335 ResourceMark rm(thread);
336 const char* klass_name = obj->klass()->external_name();
337 // lookup exception klass
338 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
339 if (ProfileTraps) {
340 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
341 }
342 // create exception, with klass name as detail message
343 Handle exception = Exceptions::new_exception(thread, s, klass_name);
344 thread->set_vm_result(exception());
345 IRT_END
346
347
348 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
349 char message[jintAsStringSize];
350 // lookup exception klass
351 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
352 if (ProfileTraps) {
353 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
354 }
355 // create exception
356 sprintf(message, "%d", index);
357 THROW_MSG(s, message);
358 IRT_END
359
360 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
361 JavaThread* thread, oopDesc* obj))
362
363 ResourceMark rm(thread);
364 char* message = SharedRuntime::generate_class_cast_message(
365 thread, obj->klass()->external_name());
366
367 if (ProfileTraps) {
368 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
369 }
370
371 // create exception
372 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
373 IRT_END
374
375 // exception_handler_for_exception(...) returns the continuation address,
376 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
377 // The exception oop is returned to make sure it is preserved over GC (it
378 // is only on the stack if the exception was thrown explicitly via athrow).
379 // During this operation, the expression stack contains the values for the
380 // bci where the exception happened. If the exception was propagated back
381 // from a call, the expression stack contains the values for the bci at the
382 // invoke w/o arguments (i.e., as if one were inside the call).
383 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
384
385 Handle h_exception(thread, exception);
386 methodHandle h_method (thread, method(thread));
387 constantPoolHandle h_constants(thread, h_method->constants());
388 bool should_repeat;
389 int handler_bci;
390 int current_bci = bci(thread);
391
392 if (thread->frames_to_pop_failed_realloc() > 0) {
393 // Allocation of scalar replaced object used in this frame
394 // failed. Unconditionally pop the frame.
395 thread->dec_frames_to_pop_failed_realloc();
396 thread->set_vm_result(h_exception());
397 // If the method is synchronized we already unlocked the monitor
398 // during deoptimization so the interpreter needs to skip it when
399 // the frame is popped.
400 thread->set_do_not_unlock_if_synchronized(true);
401 #ifdef CC_INTERP
402 return (address) -1;
403 #else
404 return Interpreter::remove_activation_entry();
405 #endif
406 }
407
408 // Need to do this check first since when _do_not_unlock_if_synchronized
409 // is set, we don't want to trigger any classloading which may make calls
410 // into java, or surprisingly find a matching exception handler for bci 0
411 // since at this moment the method hasn't been "officially" entered yet.
412 if (thread->do_not_unlock_if_synchronized()) {
413 ResourceMark rm;
414 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
415 thread->set_vm_result(exception);
416 #ifdef CC_INTERP
417 return (address) -1;
418 #else
419 return Interpreter::remove_activation_entry();
420 #endif
421 }
422
423 do {
424 should_repeat = false;
425
426 // assertions
427 #ifdef ASSERT
428 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
429 assert(h_exception->is_oop(), "just checking");
430 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
431 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
432 if (ExitVMOnVerifyError) vm_exit(-1);
433 ShouldNotReachHere();
434 }
435 #endif
436
437 // tracing
438 if (TraceExceptions) {
439 ResourceMark rm(thread);
440 Symbol* message = java_lang_Throwable::detail_message(h_exception());
441 ttyLocker ttyl; // Lock after getting the detail message
442 if (message != NULL) {
443 tty->print_cr("Exception <%s: %s> (" INTPTR_FORMAT ")",
444 h_exception->print_value_string(), message->as_C_string(),
445 p2i(h_exception()));
446 } else {
447 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")",
448 h_exception->print_value_string(),
449 p2i(h_exception()));
450 }
451 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
452 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, p2i(thread));
453 }
454 // Don't go paging in something which won't be used.
455 // else if (extable->length() == 0) {
456 // // disabled for now - interpreter is not using shortcut yet
457 // // (shortcut is not to call runtime if we have no exception handlers)
458 // // warning("performance bug: should not call runtime if method has no exception handlers");
459 // }
460 // for AbortVMOnException flag
461 Exceptions::debug_check_abort(h_exception);
462
463 // exception handler lookup
464 KlassHandle h_klass(THREAD, h_exception->klass());
465 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
466 if (HAS_PENDING_EXCEPTION) {
467 // We threw an exception while trying to find the exception handler.
468 // Transfer the new exception to the exception handle which will
469 // be set into thread local storage, and do another lookup for an
470 // exception handler for this exception, this time starting at the
471 // BCI of the exception handler which caused the exception to be
472 // thrown (bug 4307310).
473 h_exception = Handle(THREAD, PENDING_EXCEPTION);
474 CLEAR_PENDING_EXCEPTION;
475 if (handler_bci >= 0) {
476 current_bci = handler_bci;
477 should_repeat = true;
478 }
479 }
480 } while (should_repeat == true);
481
482 #if INCLUDE_JVMCI
483 if (EnableJVMCI && h_method->method_data() != NULL) {
484 ResourceMark rm(thread);
485 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
486 if (pdata != NULL && pdata->is_BitData()) {
487 BitData* bit_data = (BitData*) pdata;
488 bit_data->set_exception_seen();
489 }
490 }
491 #endif
492
493 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
494 // time throw or a stack unwinding throw and accordingly notify the debugger
495 if (JvmtiExport::can_post_on_exceptions()) {
496 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
497 }
498
499 #ifdef CC_INTERP
500 address continuation = (address)(intptr_t) handler_bci;
501 #else
502 address continuation = NULL;
503 #endif
504 address handler_pc = NULL;
505 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
506 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
507 // handler in this method, or (b) after a stack overflow there is not yet
508 // enough stack space available to reprotect the stack.
509 #ifndef CC_INTERP
510 continuation = Interpreter::remove_activation_entry();
511 #endif
512 // Count this for compilation purposes
513 h_method->interpreter_throwout_increment(THREAD);
514 } else {
515 // handler in this method => change bci/bcp to handler bci/bcp and continue there
516 handler_pc = h_method->code_base() + handler_bci;
517 #ifndef CC_INTERP
518 set_bcp_and_mdp(handler_pc, thread);
519 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
520 #endif
521 }
522 // notify debugger of an exception catch
523 // (this is good for exceptions caught in native methods as well)
524 if (JvmtiExport::can_post_on_exceptions()) {
525 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
526 }
527
528 thread->set_vm_result(h_exception());
529 return continuation;
530 IRT_END
531
532
533 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
534 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
535 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
536 IRT_END
537
538
539 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
540 THROW(vmSymbols::java_lang_AbstractMethodError());
541 IRT_END
542
543
544 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
545 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
546 IRT_END
547
548
549 //------------------------------------------------------------------------------------------------------------------------
550 // Fields
551 //
552
553 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
554 Thread* THREAD = thread;
555 // resolve field
556 fieldDescriptor info;
557 constantPoolHandle pool(thread, method(thread)->constants());
558 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
559 bytecode == Bytecodes::_putstatic);
560 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
561
562 {
563 JvmtiHideSingleStepping jhss(thread);
564 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
565 bytecode, CHECK);
566 } // end JvmtiHideSingleStepping
567
568 // check if link resolution caused cpCache to be updated
569 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
570 if (cp_cache_entry->is_resolved(bytecode)) return;
571
572 // compute auxiliary field attributes
573 TosState state = as_TosState(info.field_type());
574
575 // We need to delay resolving put instructions on final fields
576 // until we actually invoke one. This is required so we throw
577 // exceptions at the correct place. If we do not resolve completely
578 // in the current pass, leaving the put_code set to zero will
579 // cause the next put instruction to reresolve.
580 Bytecodes::Code put_code = (Bytecodes::Code)0;
581
582 // We also need to delay resolving getstatic instructions until the
583 // class is intitialized. This is required so that access to the static
584 // field will call the initialization function every time until the class
585 // is completely initialized ala. in 2.17.5 in JVM Specification.
586 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
587 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
588 !klass->is_initialized());
589 Bytecodes::Code get_code = (Bytecodes::Code)0;
590
591 if (!uninitialized_static) {
592 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
593 if (is_put || !info.access_flags().is_final()) {
594 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
595 }
596 }
597
598 cp_cache_entry->set_field(
599 get_code,
600 put_code,
601 info.field_holder(),
602 info.index(),
603 info.offset(),
604 state,
605 info.access_flags().is_final(),
606 info.access_flags().is_volatile(),
607 pool->pool_holder()
608 );
609 }
610
611
612 //------------------------------------------------------------------------------------------------------------------------
613 // Synchronization
614 //
615 // The interpreter's synchronization code is factored out so that it can
616 // be shared by method invocation and synchronized blocks.
617 //%note synchronization_3
618
619 //%note monitor_1
620 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
621 #ifdef ASSERT
622 thread->last_frame().interpreter_frame_verify_monitor(elem);
623 #endif
624 if (PrintBiasedLockingStatistics) {
625 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
626 }
627 Handle h_obj(thread, elem->obj());
628 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
629 "must be NULL or an object");
630 if (UseBiasedLocking) {
631 // Retry fast entry if bias is revoked to avoid unnecessary inflation
632 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
633 } else {
634 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
635 }
636 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
637 "must be NULL or an object");
638 #ifdef ASSERT
639 thread->last_frame().interpreter_frame_verify_monitor(elem);
640 #endif
641 IRT_END
642
643
644 //%note monitor_1
645 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
646 #ifdef ASSERT
647 thread->last_frame().interpreter_frame_verify_monitor(elem);
648 #endif
649 Handle h_obj(thread, elem->obj());
650 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
651 "must be NULL or an object");
652 if (elem == NULL || h_obj()->is_unlocked()) {
653 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
654 }
655 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
656 // Free entry. This must be done here, since a pending exception might be installed on
657 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
658 elem->set_obj(NULL);
659 #ifdef ASSERT
660 thread->last_frame().interpreter_frame_verify_monitor(elem);
661 #endif
662 IRT_END
663
664
665 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
666 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
667 IRT_END
668
669
670 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
671 // Returns an illegal exception to install into the current thread. The
672 // pending_exception flag is cleared so normal exception handling does not
673 // trigger. Any current installed exception will be overwritten. This
674 // method will be called during an exception unwind.
675
676 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
677 Handle exception(thread, thread->vm_result());
678 assert(exception() != NULL, "vm result should be set");
679 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
680 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
681 exception = get_preinitialized_exception(
682 SystemDictionary::IllegalMonitorStateException_klass(),
683 CATCH);
684 }
685 thread->set_vm_result(exception());
686 IRT_END
687
688
689 //------------------------------------------------------------------------------------------------------------------------
690 // Invokes
691
692 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
693 return method->orig_bytecode_at(method->bci_from(bcp));
694 IRT_END
695
696 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
697 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
698 IRT_END
699
700 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
701 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
702 IRT_END
703
704 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
705 Thread* THREAD = thread;
706 // extract receiver from the outgoing argument list if necessary
707 Handle receiver(thread, NULL);
708 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
709 ResourceMark rm(thread);
710 methodHandle m (thread, method(thread));
711 Bytecode_invoke call(m, bci(thread));
712 Symbol* signature = call.signature();
713 receiver = Handle(thread,
714 thread->last_frame().interpreter_callee_receiver(signature));
715 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
716 "sanity check");
717 assert(receiver.is_null() ||
718 !Universe::heap()->is_in_reserved(receiver->klass()),
719 "sanity check");
720 }
721
722 // resolve method
723 CallInfo info;
724 constantPoolHandle pool(thread, method(thread)->constants());
725
726 {
727 JvmtiHideSingleStepping jhss(thread);
728 LinkResolver::resolve_invoke(info, receiver, pool,
729 get_index_u2_cpcache(thread, bytecode), bytecode,
730 CHECK);
731 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
732 int retry_count = 0;
733 while (info.resolved_method()->is_old()) {
734 // It is very unlikely that method is redefined more than 100 times
735 // in the middle of resolve. If it is looping here more than 100 times
736 // means then there could be a bug here.
737 guarantee((retry_count++ < 100),
738 "Could not resolve to latest version of redefined method");
739 // method is redefined in the middle of resolve so re-try.
740 LinkResolver::resolve_invoke(info, receiver, pool,
741 get_index_u2_cpcache(thread, bytecode), bytecode,
742 CHECK);
743 }
744 }
745 } // end JvmtiHideSingleStepping
746
747 // check if link resolution caused cpCache to be updated
748 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
749 if (cp_cache_entry->is_resolved(bytecode)) return;
750
751 if (bytecode == Bytecodes::_invokeinterface) {
752 if (TraceItables && Verbose) {
753 ResourceMark rm(thread);
754 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
755 }
756 }
757 #ifdef ASSERT
758 if (bytecode == Bytecodes::_invokeinterface) {
759 if (info.resolved_method()->method_holder() ==
760 SystemDictionary::Object_klass()) {
761 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
762 // (see also CallInfo::set_interface for details)
763 assert(info.call_kind() == CallInfo::vtable_call ||
764 info.call_kind() == CallInfo::direct_call, "");
765 methodHandle rm = info.resolved_method();
766 assert(rm->is_final() || info.has_vtable_index(),
767 "should have been set already");
768 } else if (!info.resolved_method()->has_itable_index()) {
769 // Resolved something like CharSequence.toString. Use vtable not itable.
770 assert(info.call_kind() != CallInfo::itable_call, "");
771 } else {
772 // Setup itable entry
773 assert(info.call_kind() == CallInfo::itable_call, "");
774 int index = info.resolved_method()->itable_index();
775 assert(info.itable_index() == index, "");
776 }
777 } else {
778 assert(info.call_kind() == CallInfo::direct_call ||
779 info.call_kind() == CallInfo::vtable_call, "");
780 }
781 #endif
782 switch (info.call_kind()) {
783 case CallInfo::direct_call:
784 cp_cache_entry->set_direct_call(
785 bytecode,
786 info.resolved_method());
787 break;
788 case CallInfo::vtable_call:
789 cp_cache_entry->set_vtable_call(
790 bytecode,
791 info.resolved_method(),
792 info.vtable_index());
793 break;
794 case CallInfo::itable_call:
795 cp_cache_entry->set_itable_call(
796 bytecode,
797 info.resolved_method(),
798 info.itable_index());
799 break;
800 default: ShouldNotReachHere();
801 }
802 }
803
804
805 // First time execution: Resolve symbols, create a permanent MethodType object.
806 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
807 Thread* THREAD = thread;
808 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
809
810 // resolve method
811 CallInfo info;
812 constantPoolHandle pool(thread, method(thread)->constants());
813 {
814 JvmtiHideSingleStepping jhss(thread);
815 LinkResolver::resolve_invoke(info, Handle(), pool,
816 get_index_u2_cpcache(thread, bytecode), bytecode,
817 CHECK);
818 } // end JvmtiHideSingleStepping
819
820 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
821 cp_cache_entry->set_method_handle(pool, info);
822 }
823
824 // First time execution: Resolve symbols, create a permanent CallSite object.
825 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
826 Thread* THREAD = thread;
827 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
828
829 //TO DO: consider passing BCI to Java.
830 // int caller_bci = method(thread)->bci_from(bcp(thread));
831
832 // resolve method
833 CallInfo info;
834 constantPoolHandle pool(thread, method(thread)->constants());
835 int index = get_index_u4(thread, bytecode);
836 {
837 JvmtiHideSingleStepping jhss(thread);
838 LinkResolver::resolve_invoke(info, Handle(), pool,
839 index, bytecode, CHECK);
840 } // end JvmtiHideSingleStepping
841
842 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
843 cp_cache_entry->set_dynamic_call(pool, info);
844 }
845
846 // This function is the interface to the assembly code. It returns the resolved
847 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
848 // This function will check for redefinition!
849 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
850 switch (bytecode) {
851 case Bytecodes::_getstatic:
852 case Bytecodes::_putstatic:
853 case Bytecodes::_getfield:
854 case Bytecodes::_putfield:
855 resolve_get_put(thread, bytecode);
856 break;
857 case Bytecodes::_invokevirtual:
858 case Bytecodes::_invokespecial:
859 case Bytecodes::_invokestatic:
860 case Bytecodes::_invokeinterface:
861 resolve_invoke(thread, bytecode);
862 break;
863 case Bytecodes::_invokehandle:
864 resolve_invokehandle(thread);
865 break;
866 case Bytecodes::_invokedynamic:
867 resolve_invokedynamic(thread);
868 break;
869 default:
870 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
871 break;
872 }
873 }
874 IRT_END
875
876 //------------------------------------------------------------------------------------------------------------------------
877 // Miscellaneous
878
879
880 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
881 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
882 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
883 if (branch_bcp != NULL && nm != NULL) {
884 // This was a successful request for an OSR nmethod. Because
885 // frequency_counter_overflow_inner ends with a safepoint check,
886 // nm could have been unloaded so look it up again. It's unsafe
887 // to examine nm directly since it might have been freed and used
888 // for something else.
889 frame fr = thread->last_frame();
890 Method* method = fr.interpreter_frame_method();
891 int bci = method->bci_from(fr.interpreter_frame_bcp());
892 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
893 }
894 #ifndef PRODUCT
895 if (TraceOnStackReplacement) {
896 if (nm != NULL) {
897 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
898 nm->print();
899 }
900 }
901 #endif
902 return nm;
903 }
904
905 IRT_ENTRY(nmethod*,
906 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
907 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
908 // flag, in case this method triggers classloading which will call into Java.
909 UnlockFlagSaver fs(thread);
910
911 frame fr = thread->last_frame();
912 assert(fr.is_interpreted_frame(), "must come from interpreter");
913 methodHandle method(thread, fr.interpreter_frame_method());
914 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
915 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
916
917 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
918 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
919 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
920
921 if (osr_nm != NULL) {
922 // We may need to do on-stack replacement which requires that no
923 // monitors in the activation are biased because their
924 // BasicObjectLocks will need to migrate during OSR. Force
925 // unbiasing of all monitors in the activation now (even though
926 // the OSR nmethod might be invalidated) because we don't have a
927 // safepoint opportunity later once the migration begins.
928 if (UseBiasedLocking) {
929 ResourceMark rm;
930 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
931 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
932 kptr < fr.interpreter_frame_monitor_begin();
933 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
934 if( kptr->obj() != NULL ) {
935 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
936 }
937 }
938 BiasedLocking::revoke(objects_to_revoke);
939 }
940 }
941 return osr_nm;
942 IRT_END
943
944 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
945 assert(ProfileInterpreter, "must be profiling interpreter");
946 int bci = method->bci_from(cur_bcp);
947 MethodData* mdo = method->method_data();
948 if (mdo == NULL) return 0;
949 return mdo->bci_to_di(bci);
950 IRT_END
951
952 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
953 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
954 // flag, in case this method triggers classloading which will call into Java.
955 UnlockFlagSaver fs(thread);
956
957 assert(ProfileInterpreter, "must be profiling interpreter");
958 frame fr = thread->last_frame();
959 assert(fr.is_interpreted_frame(), "must come from interpreter");
960 methodHandle method(thread, fr.interpreter_frame_method());
961 Method::build_interpreter_method_data(method, THREAD);
962 if (HAS_PENDING_EXCEPTION) {
963 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
964 CLEAR_PENDING_EXCEPTION;
965 // and fall through...
966 }
967 IRT_END
968
969
970 #ifdef ASSERT
971 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
972 assert(ProfileInterpreter, "must be profiling interpreter");
973
974 MethodData* mdo = method->method_data();
975 assert(mdo != NULL, "must not be null");
976
977 int bci = method->bci_from(bcp);
978
979 address mdp2 = mdo->bci_to_dp(bci);
980 if (mdp != mdp2) {
981 ResourceMark rm;
982 ResetNoHandleMark rnm; // In a LEAF entry.
983 HandleMark hm;
984 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
985 int current_di = mdo->dp_to_di(mdp);
986 int expected_di = mdo->dp_to_di(mdp2);
987 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
988 int expected_approx_bci = mdo->data_at(expected_di)->bci();
989 int approx_bci = -1;
990 if (current_di >= 0) {
991 approx_bci = mdo->data_at(current_di)->bci();
992 }
993 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
994 mdo->print_on(tty);
995 method->print_codes();
996 }
997 assert(mdp == mdp2, "wrong mdp");
998 IRT_END
999 #endif // ASSERT
1000
1001 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1002 assert(ProfileInterpreter, "must be profiling interpreter");
1003 ResourceMark rm(thread);
1004 HandleMark hm(thread);
1005 frame fr = thread->last_frame();
1006 assert(fr.is_interpreted_frame(), "must come from interpreter");
1007 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
1008
1009 // Grab a lock to ensure atomic access to setting the return bci and
1010 // the displacement. This can block and GC, invalidating all naked oops.
1011 MutexLocker ml(RetData_lock);
1012
1013 // ProfileData is essentially a wrapper around a derived oop, so we
1014 // need to take the lock before making any ProfileData structures.
1015 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1016 RetData* rdata = data->as_RetData();
1017 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1018 fr.interpreter_frame_set_mdp(new_mdp);
1019 IRT_END
1020
1021 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1022 MethodCounters* mcs = Method::build_method_counters(m, thread);
1023 if (HAS_PENDING_EXCEPTION) {
1024 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1025 CLEAR_PENDING_EXCEPTION;
1026 }
1027 return mcs;
1028 IRT_END
1029
1030
1031 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1032 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1033 // stack traversal automatically takes care of preserving arguments for invoke, so
1034 // this is no longer needed.
1035
1036 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1037 // if this is called during a safepoint
1038
1039 if (JvmtiExport::should_post_single_step()) {
1040 // We are called during regular safepoints and when the VM is
1041 // single stepping. If any thread is marked for single stepping,
1042 // then we may have JVMTI work to do.
1043 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1044 }
1045 IRT_END
1046
1047 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1048 ConstantPoolCacheEntry *cp_entry))
1049
1050 // check the access_flags for the field in the klass
1051
1052 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1053 int index = cp_entry->field_index();
1054 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1055
1056 bool is_static = (obj == NULL);
1057 HandleMark hm(thread);
1058
1059 Handle h_obj;
1060 if (!is_static) {
1061 // non-static field accessors have an object, but we need a handle
1062 h_obj = Handle(thread, obj);
1063 }
1064 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
1065 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
1066 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
1067 IRT_END
1068
1069 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1070 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1071
1072 Klass* k = (Klass*)cp_entry->f1_as_klass();
1073
1074 // check the access_flags for the field in the klass
1075 InstanceKlass* ik = InstanceKlass::cast(k);
1076 int index = cp_entry->field_index();
1077 // bail out if field modifications are not watched
1078 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1079
1080 char sig_type = '\0';
1081
1082 switch(cp_entry->flag_state()) {
1083 case btos: sig_type = 'Z'; break;
1084 case ctos: sig_type = 'C'; break;
1085 case stos: sig_type = 'S'; break;
1086 case itos: sig_type = 'I'; break;
1087 case ftos: sig_type = 'F'; break;
1088 case atos: sig_type = 'L'; break;
1089 case ltos: sig_type = 'J'; break;
1090 case dtos: sig_type = 'D'; break;
1091 default: ShouldNotReachHere(); return;
1092 }
1093 bool is_static = (obj == NULL);
1094
1095 HandleMark hm(thread);
1096 instanceKlassHandle h_klass(thread, k);
1097 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1098 jvalue fvalue;
1099 #ifdef _LP64
1100 fvalue = *value;
1101 #else
1102 // Long/double values are stored unaligned and also noncontiguously with
1103 // tagged stacks. We can't just do a simple assignment even in the non-
1104 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1105 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1106 // We assume that the two halves of longs/doubles are stored in interpreter
1107 // stack slots in platform-endian order.
1108 jlong_accessor u;
1109 jint* newval = (jint*)value;
1110 u.words[0] = newval[0];
1111 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1112 fvalue.j = u.long_value;
1113 #endif // _LP64
1114
1115 Handle h_obj;
1116 if (!is_static) {
1117 // non-static field accessors have an object, but we need a handle
1118 h_obj = Handle(thread, obj);
1119 }
1120
1121 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1122 fid, sig_type, &fvalue);
1123 IRT_END
1124
1125 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1126 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1127 IRT_END
1128
1129
1130 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1131 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1132 IRT_END
1133
1134 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1135 {
1136 return (Interpreter::contains(pc) ? 1 : 0);
1137 }
1138 IRT_END
1139
1140
1141 // Implementation of SignatureHandlerLibrary
1142
1143 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1144 // Dummy definition (else normalization method is defined in CPU
1145 // dependant code)
1146 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1147 return fingerprint;
1148 }
1149 #endif
1150
1151 address SignatureHandlerLibrary::set_handler_blob() {
1152 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1153 if (handler_blob == NULL) {
1154 return NULL;
1155 }
1156 address handler = handler_blob->code_begin();
1157 _handler_blob = handler_blob;
1158 _handler = handler;
1159 return handler;
1160 }
1161
1162 void SignatureHandlerLibrary::initialize() {
1163 if (_fingerprints != NULL) {
1164 return;
1165 }
1166 if (set_handler_blob() == NULL) {
1167 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1168 }
1169
1170 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1171 SignatureHandlerLibrary::buffer_size);
1172 _buffer = bb->code_begin();
1173
1174 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1175 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1176 }
1177
1178 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1179 address handler = _handler;
1180 int insts_size = buffer->pure_insts_size();
1181 if (handler + insts_size > _handler_blob->code_end()) {
1182 // get a new handler blob
1183 handler = set_handler_blob();
1184 }
1185 if (handler != NULL) {
1186 memcpy(handler, buffer->insts_begin(), insts_size);
1187 pd_set_handler(handler);
1188 ICache::invalidate_range(handler, insts_size);
1189 _handler = handler + insts_size;
1190 }
1191 CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler);
1192 return handler;
1193 }
1194
1195 void SignatureHandlerLibrary::add(const methodHandle& method) {
1196 if (method->signature_handler() == NULL) {
1197 // use slow signature handler if we can't do better
1198 int handler_index = -1;
1199 // check if we can use customized (fast) signature handler
1200 if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1201 // use customized signature handler
1202 MutexLocker mu(SignatureHandlerLibrary_lock);
1203 // make sure data structure is initialized
1204 initialize();
1205 // lookup method signature's fingerprint
1206 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1207 // allow CPU dependant code to optimize the fingerprints for the fast handler
1208 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1209 handler_index = _fingerprints->find(fingerprint);
1210 // create handler if necessary
1211 if (handler_index < 0) {
1212 ResourceMark rm;
1213 ptrdiff_t align_offset = (address)
1214 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1215 CodeBuffer buffer((address)(_buffer + align_offset),
1216 SignatureHandlerLibrary::buffer_size - align_offset);
1217 if (!CodeCacheExtensions::support_dynamic_code()) {
1218 // we need a name for the signature (for lookups or saving)
1219 const int SYMBOL_SIZE = 50;
1220 char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE);
1221 // support for named signatures
1222 jio_snprintf(symbolName, SYMBOL_SIZE,
1223 "native_" UINT64_FORMAT, fingerprint);
1224 buffer.set_name(symbolName);
1225 }
1226 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1227 // copy into code heap
1228 address handler = set_handler(&buffer);
1229 if (handler == NULL) {
1230 // use slow signature handler (without memorizing it in the fingerprints)
1231 } else {
1232 // debugging suppport
1233 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1234 tty->cr();
1235 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1236 _handlers->length(),
1237 (method->is_static() ? "static" : "receiver"),
1238 method->name_and_sig_as_C_string(),
1239 fingerprint,
1240 buffer.insts_size());
1241 if (buffer.insts_size() > 0) {
1242 // buffer may be empty for pregenerated handlers
1243 Disassembler::decode(handler, handler + buffer.insts_size());
1244 }
1245 #ifndef PRODUCT
1246 address rh_begin = Interpreter::result_handler(method()->result_type());
1247 if (CodeCache::contains(rh_begin)) {
1248 // else it might be special platform dependent values
1249 tty->print_cr(" --- associated result handler ---");
1250 address rh_end = rh_begin;
1251 while (*(int*)rh_end != 0) {
1252 rh_end += sizeof(int);
1253 }
1254 Disassembler::decode(rh_begin, rh_end);
1255 } else {
1256 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1257 }
1258 #endif
1259 }
1260 // add handler to library
1261 _fingerprints->append(fingerprint);
1262 _handlers->append(handler);
1263 // set handler index
1264 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1265 handler_index = _fingerprints->length() - 1;
1266 }
1267 }
1268 // Set handler under SignatureHandlerLibrary_lock
1269 if (handler_index < 0) {
1270 // use generic signature handler
1271 method->set_signature_handler(Interpreter::slow_signature_handler());
1272 } else {
1273 // set handler
1274 method->set_signature_handler(_handlers->at(handler_index));
1275 }
1276 } else {
1277 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1278 // use generic signature handler
1279 method->set_signature_handler(Interpreter::slow_signature_handler());
1280 }
1281 }
1282 #ifdef ASSERT
1283 int handler_index = -1;
1284 int fingerprint_index = -2;
1285 {
1286 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1287 // in any way if accessed from multiple threads. To avoid races with another
1288 // thread which may change the arrays in the above, mutex protected block, we
1289 // have to protect this read access here with the same mutex as well!
1290 MutexLocker mu(SignatureHandlerLibrary_lock);
1291 if (_handlers != NULL) {
1292 handler_index = _handlers->find(method->signature_handler());
1293 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1294 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1295 fingerprint_index = _fingerprints->find(fingerprint);
1296 }
1297 }
1298 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1299 handler_index == fingerprint_index, "sanity check");
1300 #endif // ASSERT
1301 }
1302
1303 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1304 int handler_index = -1;
1305 // use customized signature handler
1306 MutexLocker mu(SignatureHandlerLibrary_lock);
1307 // make sure data structure is initialized
1308 initialize();
1309 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1310 handler_index = _fingerprints->find(fingerprint);
1311 // create handler if necessary
1312 if (handler_index < 0) {
1313 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1314 tty->cr();
1315 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1316 _handlers->length(),
1317 p2i(handler),
1318 fingerprint);
1319 }
1320 _fingerprints->append(fingerprint);
1321 _handlers->append(handler);
1322 } else {
1323 if (PrintSignatureHandlers) {
1324 tty->cr();
1325 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1326 _handlers->length(),
1327 fingerprint,
1328 p2i(_handlers->at(handler_index)),
1329 p2i(handler));
1330 }
1331 }
1332 }
1333
1334
1335 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1336 address SignatureHandlerLibrary::_handler = NULL;
1337 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1338 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1339 address SignatureHandlerLibrary::_buffer = NULL;
1340
1341
1342 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1343 methodHandle m(thread, method);
1344 assert(m->is_native(), "sanity check");
1345 // lookup native function entry point if it doesn't exist
1346 bool in_base_library;
1347 if (!m->has_native_function()) {
1348 NativeLookup::lookup(m, in_base_library, CHECK);
1349 }
1350 // make sure signature handler is installed
1351 SignatureHandlerLibrary::add(m);
1352 // The interpreter entry point checks the signature handler first,
1353 // before trying to fetch the native entry point and klass mirror.
1354 // We must set the signature handler last, so that multiple processors
1355 // preparing the same method will be sure to see non-null entry & mirror.
1356 IRT_END
1357
1358 #if defined(IA32) || defined(AMD64) || defined(ARM)
1359 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1360 if (src_address == dest_address) {
1361 return;
1362 }
1363 ResetNoHandleMark rnm; // In a LEAF entry.
1364 HandleMark hm;
1365 ResourceMark rm;
1366 frame fr = thread->last_frame();
1367 assert(fr.is_interpreted_frame(), "");
1368 jint bci = fr.interpreter_frame_bci();
1369 methodHandle mh(thread, fr.interpreter_frame_method());
1370 Bytecode_invoke invoke(mh, bci);
1371 ArgumentSizeComputer asc(invoke.signature());
1372 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1373 Copy::conjoint_jbytes(src_address, dest_address,
1374 size_of_arguments * Interpreter::stackElementSize);
1375 IRT_END
1376 #endif
1377
1378 #if INCLUDE_JVMTI
1379 // This is a support of the JVMTI PopFrame interface.
1380 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1381 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1382 // The member_name argument is a saved reference (in local#0) to the member_name.
1383 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1384 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1385 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1386 Method* method, address bcp))
1387 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1388 if (code != Bytecodes::_invokestatic) {
1389 return;
1390 }
1391 ConstantPool* cpool = method->constants();
1392 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1393 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1394 Symbol* mname = cpool->name_ref_at(cp_index);
1395
1396 if (MethodHandles::has_member_arg(cname, mname)) {
1397 oop member_name_oop = (oop) member_name;
1398 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1399 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1400 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1401 }
1402 thread->set_vm_result(member_name_oop);
1403 } else {
1404 thread->set_vm_result(NULL);
1405 }
1406 IRT_END
1407 #endif // INCLUDE_JVMTI