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 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
70
71 class UnlockFlagSaver {
72 private:
73 JavaThread* _thread;
74 bool _do_not_unlock;
75 public:
76 UnlockFlagSaver(JavaThread* t) {
77 _thread = t;
78 _do_not_unlock = t->do_not_unlock_if_synchronized();
79 t->set_do_not_unlock_if_synchronized(false);
80 }
81 ~UnlockFlagSaver() {
82 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
83 }
84 };
85
86 //------------------------------------------------------------------------------------------------------------------------
87 // State accessors
88
89 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
90 last_frame(thread).interpreter_frame_set_bcp(bcp);
91 if (ProfileInterpreter) {
92 // ProfileTraps uses MDOs independently of ProfileInterpreter.
93 // That is why we must check both ProfileInterpreter and mdo != NULL.
94 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
95 if (mdo != NULL) {
96 NEEDS_CLEANUP;
97 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
98 }
99 }
100 }
101
102 //------------------------------------------------------------------------------------------------------------------------
103 // Constants
104
105
106 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
107 // access constant pool
108 ConstantPool* pool = method(thread)->constants();
109 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
110 constantTag tag = pool->tag_at(index);
111
112 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
113 Klass* klass = pool->klass_at(index, CHECK);
114 oop java_class = klass->java_mirror();
115 thread->set_vm_result(java_class);
116 IRT_END
117
118 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
119 assert(bytecode == Bytecodes::_fast_aldc ||
120 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
121 ResourceMark rm(thread);
122 methodHandle m (thread, method(thread));
123 Bytecode_loadconstant ldc(m, bci(thread));
124 oop result = ldc.resolve_constant(CHECK);
125 #ifdef ASSERT
126 {
127 // The bytecode wrappers aren't GC-safe so construct a new one
128 Bytecode_loadconstant ldc2(m, bci(thread));
129 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
130 assert(result == coop, "expected result for assembly code");
131 }
132 #endif
133 thread->set_vm_result(result);
134 }
135 IRT_END
136
137
138 //------------------------------------------------------------------------------------------------------------------------
139 // Allocation
140
141 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
142 Klass* k_oop = pool->klass_at(index, CHECK);
143 instanceKlassHandle klass (THREAD, k_oop);
144
145 // Make sure we are not instantiating an abstract klass
146 klass->check_valid_for_instantiation(true, CHECK);
147
148 // Make sure klass is initialized
149 klass->initialize(CHECK);
150
151 // At this point the class may not be fully initialized
152 // because of recursive initialization. If it is fully
153 // initialized & has_finalized is not set, we rewrite
154 // it into its fast version (Note: no locking is needed
155 // here since this is an atomic byte write and can be
156 // done more than once).
157 //
158 // Note: In case of classes with has_finalized we don't
159 // rewrite since that saves us an extra check in
160 // the fast version which then would call the
161 // slow version anyway (and do a call back into
162 // Java).
163 // If we have a breakpoint, then we don't rewrite
164 // because the _breakpoint bytecode would be lost.
165 oop obj = klass->allocate_instance(CHECK);
166 thread->set_vm_result(obj);
167 IRT_END
168
169
170 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
171 oop obj = oopFactory::new_typeArray(type, size, CHECK);
172 thread->set_vm_result(obj);
173 IRT_END
174
175
176 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
177 // Note: no oopHandle for pool & klass needed since they are not used
178 // anymore after new_objArray() and no GC can happen before.
179 // (This may have to change if this code changes!)
180 Klass* klass = pool->klass_at(index, CHECK);
181 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
182 thread->set_vm_result(obj);
183 IRT_END
184
185
186 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
187 // We may want to pass in more arguments - could make this slightly faster
188 ConstantPool* constants = method(thread)->constants();
189 int i = get_index_u2(thread, Bytecodes::_multianewarray);
190 Klass* klass = constants->klass_at(i, CHECK);
191 int nof_dims = number_of_dimensions(thread);
192 assert(klass->is_klass(), "not a class");
193 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
194
195 // We must create an array of jints to pass to multi_allocate.
196 ResourceMark rm(thread);
197 const int small_dims = 10;
198 jint dim_array[small_dims];
199 jint *dims = &dim_array[0];
200 if (nof_dims > small_dims) {
201 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
202 }
203 for (int index = 0; index < nof_dims; index++) {
204 // offset from first_size_address is addressed as local[index]
205 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
206 dims[index] = first_size_address[n];
207 }
208 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
209 thread->set_vm_result(obj);
210 IRT_END
211
212
213 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
214 assert(obj->is_oop(), "must be a valid oop");
215 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
216 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
217 IRT_END
218
219
220 // Quicken instance-of and check-cast bytecodes
221 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
222 // Force resolving; quicken the bytecode
223 int which = get_index_u2(thread, Bytecodes::_checkcast);
224 ConstantPool* cpool = method(thread)->constants();
225 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
226 // program we might have seen an unquick'd bytecode in the interpreter but have another
227 // thread quicken the bytecode before we get here.
228 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
229 Klass* klass = cpool->klass_at(which, CHECK);
230 thread->set_vm_result_2(klass);
231 IRT_END
232
233
234 //------------------------------------------------------------------------------------------------------------------------
235 // Exceptions
236
237 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
238 methodHandle trap_method, int trap_bci, TRAPS) {
239 if (trap_method.not_null()) {
240 MethodData* trap_mdo = trap_method->method_data();
241 if (trap_mdo == NULL) {
242 Method::build_interpreter_method_data(trap_method, THREAD);
243 if (HAS_PENDING_EXCEPTION) {
244 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
245 "we expect only an OOM error here");
246 CLEAR_PENDING_EXCEPTION;
247 }
248 trap_mdo = trap_method->method_data();
249 // and fall through...
250 }
251 if (trap_mdo != NULL) {
252 // Update per-method count of trap events. The interpreter
253 // is updating the MDO to simulate the effect of compiler traps.
254 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
255 }
256 }
257 }
258
259 // Assume the compiler is (or will be) interested in this event.
260 // If necessary, create an MDO to hold the information, and record it.
261 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
262 assert(ProfileTraps, "call me only if profiling");
263 methodHandle trap_method(thread, method(thread));
264 int trap_bci = trap_method->bci_from(bcp(thread));
265 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
266 }
267
268 #ifdef CC_INTERP
269 // As legacy note_trap, but we have more arguments.
270 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
271 methodHandle trap_method(method);
272 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
273 IRT_END
274
275 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
276 // for each exception.
277 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
278 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
279 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
280 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
281 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
282 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
283 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
284 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
285 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
286 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
287 #endif // CC_INTERP
288
289
290 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
291 // get klass
292 InstanceKlass* klass = InstanceKlass::cast(k);
293 assert(klass->is_initialized(),
294 "this klass should have been initialized during VM initialization");
295 // create instance - do not call constructor since we may have no
296 // (java) stack space left (should assert constructor is empty)
297 Handle exception;
298 oop exception_oop = klass->allocate_instance(CHECK_(exception));
299 exception = Handle(THREAD, exception_oop);
300 if (StackTraceInThrowable) {
301 java_lang_Throwable::fill_in_stack_trace(exception);
302 }
303 return exception;
304 }
305
306 // Special handling for stack overflow: since we don't have any (java) stack
307 // space left we use the pre-allocated & pre-initialized StackOverflowError
308 // klass to create an stack overflow error instance. We do not call its
309 // constructor for the same reason (it is empty, anyway).
310 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
311 Handle exception = get_preinitialized_exception(
312 SystemDictionary::StackOverflowError_klass(),
313 CHECK);
314 // Increment counter for hs_err file reporting
315 Atomic::inc(&Exceptions::_stack_overflow_errors);
316 THROW_HANDLE(exception);
317 IRT_END
318
319
320 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
321 // lookup exception klass
322 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
323 if (ProfileTraps) {
324 if (s == vmSymbols::java_lang_ArithmeticException()) {
325 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
326 } else if (s == vmSymbols::java_lang_NullPointerException()) {
327 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
328 }
329 }
330 // create exception
331 Handle exception = Exceptions::new_exception(thread, s, message);
332 thread->set_vm_result(exception());
333 IRT_END
334
335
336 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
337 ResourceMark rm(thread);
338 const char* klass_name = obj->klass()->external_name();
339 // lookup exception klass
340 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
341 if (ProfileTraps) {
342 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
343 }
344 // create exception, with klass name as detail message
345 Handle exception = Exceptions::new_exception(thread, s, klass_name);
346 thread->set_vm_result(exception());
347 IRT_END
348
349
350 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
351 char message[jintAsStringSize];
352 // lookup exception klass
353 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
354 if (ProfileTraps) {
355 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
356 }
357 // create exception
358 sprintf(message, "%d", index);
359 THROW_MSG(s, message);
360 IRT_END
361
362 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
363 JavaThread* thread, oopDesc* obj))
364
365 ResourceMark rm(thread);
366 char* message = SharedRuntime::generate_class_cast_message(
367 thread, obj->klass()->external_name());
368
369 if (ProfileTraps) {
370 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
371 }
372
373 // create exception
374 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
375 IRT_END
376
377 // exception_handler_for_exception(...) returns the continuation address,
378 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
379 // The exception oop is returned to make sure it is preserved over GC (it
380 // is only on the stack if the exception was thrown explicitly via athrow).
381 // During this operation, the expression stack contains the values for the
382 // bci where the exception happened. If the exception was propagated back
383 // from a call, the expression stack contains the values for the bci at the
384 // invoke w/o arguments (i.e., as if one were inside the call).
385 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
386
387 Handle h_exception(thread, exception);
388 methodHandle h_method (thread, method(thread));
389 constantPoolHandle h_constants(thread, h_method->constants());
390 bool should_repeat;
391 int handler_bci;
392 int current_bci = bci(thread);
393
394 if (thread->frames_to_pop_failed_realloc() > 0) {
395 // Allocation of scalar replaced object used in this frame
396 // failed. Unconditionally pop the frame.
397 thread->dec_frames_to_pop_failed_realloc();
398 thread->set_vm_result(h_exception());
399 // If the method is synchronized we already unlocked the monitor
400 // during deoptimization so the interpreter needs to skip it when
401 // the frame is popped.
402 thread->set_do_not_unlock_if_synchronized(true);
403 #ifdef CC_INTERP
404 return (address) -1;
405 #else
406 return Interpreter::remove_activation_entry();
407 #endif
408 }
409
410 // Need to do this check first since when _do_not_unlock_if_synchronized
411 // is set, we don't want to trigger any classloading which may make calls
412 // into java, or surprisingly find a matching exception handler for bci 0
413 // since at this moment the method hasn't been "officially" entered yet.
414 if (thread->do_not_unlock_if_synchronized()) {
415 ResourceMark rm;
416 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
417 thread->set_vm_result(exception);
418 #ifdef CC_INTERP
419 return (address) -1;
420 #else
421 return Interpreter::remove_activation_entry();
422 #endif
423 }
424
425 do {
426 should_repeat = false;
427
428 // assertions
429 #ifdef ASSERT
430 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
431 assert(h_exception->is_oop(), "just checking");
432 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
433 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
434 if (ExitVMOnVerifyError) vm_exit(-1);
435 ShouldNotReachHere();
436 }
437 #endif
438
439 // tracing
440 if (TraceExceptions) {
441 ResourceMark rm(thread);
442 Symbol* message = java_lang_Throwable::detail_message(h_exception());
443 ttyLocker ttyl; // Lock after getting the detail message
444 if (message != NULL) {
445 tty->print_cr("Exception <%s: %s> (" INTPTR_FORMAT ")",
446 h_exception->print_value_string(), message->as_C_string(),
447 (address)h_exception());
448 } else {
449 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")",
450 h_exception->print_value_string(),
451 (address)h_exception());
452 }
453 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
454 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
455 }
456 // Don't go paging in something which won't be used.
457 // else if (extable->length() == 0) {
458 // // disabled for now - interpreter is not using shortcut yet
459 // // (shortcut is not to call runtime if we have no exception handlers)
460 // // warning("performance bug: should not call runtime if method has no exception handlers");
461 // }
462 // for AbortVMOnException flag
463 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
464
465 // exception handler lookup
466 KlassHandle h_klass(THREAD, h_exception->klass());
467 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
468 if (HAS_PENDING_EXCEPTION) {
469 // We threw an exception while trying to find the exception handler.
470 // Transfer the new exception to the exception handle which will
471 // be set into thread local storage, and do another lookup for an
472 // exception handler for this exception, this time starting at the
473 // BCI of the exception handler which caused the exception to be
474 // thrown (bug 4307310).
475 h_exception = Handle(THREAD, PENDING_EXCEPTION);
476 CLEAR_PENDING_EXCEPTION;
477 if (handler_bci >= 0) {
478 current_bci = handler_bci;
479 should_repeat = true;
480 }
481 }
482 } while (should_repeat == true);
483
484 #if INCLUDE_JVMCI
485 if (UseJVMCICompiler && h_method->method_data() != NULL) {
486 ResourceMark rm(thread);
487 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
488 if (pdata != NULL && pdata->is_BitData()) {
489 BitData* bit_data = (BitData*) pdata;
490 bit_data->set_exception_seen();
491 }
492 }
493 #endif
494
495 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
496 // time throw or a stack unwinding throw and accordingly notify the debugger
497 if (JvmtiExport::can_post_on_exceptions()) {
498 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
499 }
500
501 #ifdef CC_INTERP
502 address continuation = (address)(intptr_t) handler_bci;
503 #else
504 address continuation = NULL;
505 #endif
506 address handler_pc = NULL;
507 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
508 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
509 // handler in this method, or (b) after a stack overflow there is not yet
510 // enough stack space available to reprotect the stack.
511 #ifndef CC_INTERP
512 continuation = Interpreter::remove_activation_entry();
513 #endif
514 // Count this for compilation purposes
515 h_method->interpreter_throwout_increment(THREAD);
516 } else {
517 // handler in this method => change bci/bcp to handler bci/bcp and continue there
518 handler_pc = h_method->code_base() + handler_bci;
519 #ifndef CC_INTERP
520 set_bcp_and_mdp(handler_pc, thread);
521 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
522 #endif
523 }
524 // notify debugger of an exception catch
525 // (this is good for exceptions caught in native methods as well)
526 if (JvmtiExport::can_post_on_exceptions()) {
527 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
528 }
529
530 thread->set_vm_result(h_exception());
531 return continuation;
532 IRT_END
533
534
535 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
536 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
537 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
538 IRT_END
539
540
541 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
542 THROW(vmSymbols::java_lang_AbstractMethodError());
543 IRT_END
544
545
546 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
547 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
548 IRT_END
549
550
551 //------------------------------------------------------------------------------------------------------------------------
552 // Fields
553 //
554
555 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
556 Thread* THREAD = thread;
557 // resolve field
558 fieldDescriptor info;
559 constantPoolHandle pool(thread, method(thread)->constants());
560 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
561 bytecode == Bytecodes::_putstatic);
562 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
563
564 {
565 JvmtiHideSingleStepping jhss(thread);
566 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
567 bytecode, CHECK);
568 } // end JvmtiHideSingleStepping
569
570 // check if link resolution caused cpCache to be updated
571 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
572 if (cp_cache_entry->is_resolved(bytecode)) return;
573
574 // compute auxiliary field attributes
575 TosState state = as_TosState(info.field_type());
576
577 // We need to delay resolving put instructions on final fields
578 // until we actually invoke one. This is required so we throw
579 // exceptions at the correct place. If we do not resolve completely
580 // in the current pass, leaving the put_code set to zero will
581 // cause the next put instruction to reresolve.
582 Bytecodes::Code put_code = (Bytecodes::Code)0;
583
584 // We also need to delay resolving getstatic instructions until the
585 // class is intitialized. This is required so that access to the static
586 // field will call the initialization function every time until the class
587 // is completely initialized ala. in 2.17.5 in JVM Specification.
588 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
589 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
590 !klass->is_initialized());
591 Bytecodes::Code get_code = (Bytecodes::Code)0;
592
593 if (!uninitialized_static) {
594 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
595 if (is_put || !info.access_flags().is_final()) {
596 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
597 }
598 }
599
600 cp_cache_entry->set_field(
601 get_code,
602 put_code,
603 info.field_holder(),
604 info.index(),
605 info.offset(),
606 state,
607 info.access_flags().is_final(),
608 info.access_flags().is_volatile(),
609 pool->pool_holder()
610 );
611 }
612
613
614 //------------------------------------------------------------------------------------------------------------------------
615 // Synchronization
616 //
617 // The interpreter's synchronization code is factored out so that it can
618 // be shared by method invocation and synchronized blocks.
619 //%note synchronization_3
620
621 //%note monitor_1
622 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
623 #ifdef ASSERT
624 thread->last_frame().interpreter_frame_verify_monitor(elem);
625 #endif
626 if (PrintBiasedLockingStatistics) {
627 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
628 }
629 Handle h_obj(thread, elem->obj());
630 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
631 "must be NULL or an object");
632 if (UseBiasedLocking) {
633 // Retry fast entry if bias is revoked to avoid unnecessary inflation
634 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
635 } else {
636 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
637 }
638 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
639 "must be NULL or an object");
640 #ifdef ASSERT
641 thread->last_frame().interpreter_frame_verify_monitor(elem);
642 #endif
643 IRT_END
644
645
646 //%note monitor_1
647 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
648 #ifdef ASSERT
649 thread->last_frame().interpreter_frame_verify_monitor(elem);
650 #endif
651 Handle h_obj(thread, elem->obj());
652 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
653 "must be NULL or an object");
654 if (elem == NULL || h_obj()->is_unlocked()) {
655 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
656 }
657 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
658 // Free entry. This must be done here, since a pending exception might be installed on
659 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
660 elem->set_obj(NULL);
661 #ifdef ASSERT
662 thread->last_frame().interpreter_frame_verify_monitor(elem);
663 #endif
664 IRT_END
665
666
667 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
668 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
669 IRT_END
670
671
672 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
673 // Returns an illegal exception to install into the current thread. The
674 // pending_exception flag is cleared so normal exception handling does not
675 // trigger. Any current installed exception will be overwritten. This
676 // method will be called during an exception unwind.
677
678 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
679 Handle exception(thread, thread->vm_result());
680 assert(exception() != NULL, "vm result should be set");
681 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
682 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
683 exception = get_preinitialized_exception(
684 SystemDictionary::IllegalMonitorStateException_klass(),
685 CATCH);
686 }
687 thread->set_vm_result(exception());
688 IRT_END
689
690
691 //------------------------------------------------------------------------------------------------------------------------
692 // Invokes
693
694 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
695 return method->orig_bytecode_at(method->bci_from(bcp));
696 IRT_END
697
698 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
699 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
700 IRT_END
701
702 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
703 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
704 IRT_END
705
706 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
707 Thread* THREAD = thread;
708 // extract receiver from the outgoing argument list if necessary
709 Handle receiver(thread, NULL);
710 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
711 ResourceMark rm(thread);
712 methodHandle m (thread, method(thread));
713 Bytecode_invoke call(m, bci(thread));
714 Symbol* signature = call.signature();
715 receiver = Handle(thread,
716 thread->last_frame().interpreter_callee_receiver(signature));
717 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
718 "sanity check");
719 assert(receiver.is_null() ||
720 !Universe::heap()->is_in_reserved(receiver->klass()),
721 "sanity check");
722 }
723
724 // resolve method
725 CallInfo info;
726 constantPoolHandle pool(thread, method(thread)->constants());
727
728 {
729 JvmtiHideSingleStepping jhss(thread);
730 LinkResolver::resolve_invoke(info, receiver, pool,
731 get_index_u2_cpcache(thread, bytecode), bytecode,
732 CHECK);
733 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
734 int retry_count = 0;
735 while (info.resolved_method()->is_old()) {
736 // It is very unlikely that method is redefined more than 100 times
737 // in the middle of resolve. If it is looping here more than 100 times
738 // means then there could be a bug here.
739 guarantee((retry_count++ < 100),
740 "Could not resolve to latest version of redefined method");
741 // method is redefined in the middle of resolve so re-try.
742 LinkResolver::resolve_invoke(info, receiver, pool,
743 get_index_u2_cpcache(thread, bytecode), bytecode,
744 CHECK);
745 }
746 }
747 } // end JvmtiHideSingleStepping
748
749 // check if link resolution caused cpCache to be updated
750 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
751 if (cp_cache_entry->is_resolved(bytecode)) return;
752
753 if (bytecode == Bytecodes::_invokeinterface) {
754 if (TraceItables && Verbose) {
755 ResourceMark rm(thread);
756 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
757 }
758 }
759 #ifdef ASSERT
760 if (bytecode == Bytecodes::_invokeinterface) {
761 if (info.resolved_method()->method_holder() ==
762 SystemDictionary::Object_klass()) {
763 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
764 // (see also CallInfo::set_interface for details)
765 assert(info.call_kind() == CallInfo::vtable_call ||
766 info.call_kind() == CallInfo::direct_call, "");
767 methodHandle rm = info.resolved_method();
768 assert(rm->is_final() || info.has_vtable_index(),
769 "should have been set already");
770 } else if (!info.resolved_method()->has_itable_index()) {
771 // Resolved something like CharSequence.toString. Use vtable not itable.
772 assert(info.call_kind() != CallInfo::itable_call, "");
773 } else {
774 // Setup itable entry
775 assert(info.call_kind() == CallInfo::itable_call, "");
776 int index = info.resolved_method()->itable_index();
777 assert(info.itable_index() == index, "");
778 }
779 } else {
780 assert(info.call_kind() == CallInfo::direct_call ||
781 info.call_kind() == CallInfo::vtable_call, "");
782 }
783 #endif
784 switch (info.call_kind()) {
785 case CallInfo::direct_call:
786 cp_cache_entry->set_direct_call(
787 bytecode,
788 info.resolved_method());
789 break;
790 case CallInfo::vtable_call:
791 cp_cache_entry->set_vtable_call(
792 bytecode,
793 info.resolved_method(),
794 info.vtable_index());
795 break;
796 case CallInfo::itable_call:
797 cp_cache_entry->set_itable_call(
798 bytecode,
799 info.resolved_method(),
800 info.itable_index());
801 break;
802 default: ShouldNotReachHere();
803 }
804 }
805
806
807 // First time execution: Resolve symbols, create a permanent MethodType object.
808 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
809 Thread* THREAD = thread;
810 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
811
812 // resolve method
813 CallInfo info;
814 constantPoolHandle pool(thread, method(thread)->constants());
815 {
816 JvmtiHideSingleStepping jhss(thread);
817 LinkResolver::resolve_invoke(info, Handle(), pool,
818 get_index_u2_cpcache(thread, bytecode), bytecode,
819 CHECK);
820 } // end JvmtiHideSingleStepping
821
822 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
823 cp_cache_entry->set_method_handle(pool, info);
824 }
825
826 // First time execution: Resolve symbols, create a permanent CallSite object.
827 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
828 Thread* THREAD = thread;
829 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
830
831 //TO DO: consider passing BCI to Java.
832 // int caller_bci = method(thread)->bci_from(bcp(thread));
833
834 // resolve method
835 CallInfo info;
836 constantPoolHandle pool(thread, method(thread)->constants());
837 int index = get_index_u4(thread, bytecode);
838 {
839 JvmtiHideSingleStepping jhss(thread);
840 LinkResolver::resolve_invoke(info, Handle(), pool,
841 index, bytecode, CHECK);
842 } // end JvmtiHideSingleStepping
843
844 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
845 cp_cache_entry->set_dynamic_call(pool, info);
846 }
847
848 // This function is the interface to the assembly code. It returns the resolved
849 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
850 // This function will check for redefinition!
851 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
852 switch (bytecode) {
853 case Bytecodes::_getstatic:
854 case Bytecodes::_putstatic:
855 case Bytecodes::_getfield:
856 case Bytecodes::_putfield:
857 resolve_get_put(thread, bytecode);
858 break;
859 case Bytecodes::_invokevirtual:
860 case Bytecodes::_invokespecial:
861 case Bytecodes::_invokestatic:
862 case Bytecodes::_invokeinterface:
863 resolve_invoke(thread, bytecode);
864 break;
865 case Bytecodes::_invokehandle:
866 resolve_invokehandle(thread);
867 break;
868 case Bytecodes::_invokedynamic:
869 resolve_invokedynamic(thread);
870 break;
871 default:
872 fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(bytecode)));
873 break;
874 }
875 }
876 IRT_END
877
878 //------------------------------------------------------------------------------------------------------------------------
879 // Miscellaneous
880
881
882 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
883 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
884 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
885 if (branch_bcp != NULL && nm != NULL) {
886 // This was a successful request for an OSR nmethod. Because
887 // frequency_counter_overflow_inner ends with a safepoint check,
888 // nm could have been unloaded so look it up again. It's unsafe
889 // to examine nm directly since it might have been freed and used
890 // for something else.
891 frame fr = thread->last_frame();
892 Method* method = fr.interpreter_frame_method();
893 int bci = method->bci_from(fr.interpreter_frame_bcp());
894 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
895 }
896 #ifndef PRODUCT
897 if (TraceOnStackReplacement) {
898 if (nm != NULL) {
899 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
900 nm->print();
901 }
902 }
903 #endif
904 return nm;
905 }
906
907 IRT_ENTRY(nmethod*,
908 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
909 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
910 // flag, in case this method triggers classloading which will call into Java.
911 UnlockFlagSaver fs(thread);
912
913 frame fr = thread->last_frame();
914 assert(fr.is_interpreted_frame(), "must come from interpreter");
915 methodHandle method(thread, fr.interpreter_frame_method());
916 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
917 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
918
919 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
920 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
921 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
922
923 if (osr_nm != NULL) {
924 // We may need to do on-stack replacement which requires that no
925 // monitors in the activation are biased because their
926 // BasicObjectLocks will need to migrate during OSR. Force
927 // unbiasing of all monitors in the activation now (even though
928 // the OSR nmethod might be invalidated) because we don't have a
929 // safepoint opportunity later once the migration begins.
930 if (UseBiasedLocking) {
931 ResourceMark rm;
932 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
933 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
934 kptr < fr.interpreter_frame_monitor_begin();
935 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
936 if( kptr->obj() != NULL ) {
937 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
938 }
939 }
940 BiasedLocking::revoke(objects_to_revoke);
941 }
942 }
943 return osr_nm;
944 IRT_END
945
946 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
947 assert(ProfileInterpreter, "must be profiling interpreter");
948 int bci = method->bci_from(cur_bcp);
949 MethodData* mdo = method->method_data();
950 if (mdo == NULL) return 0;
951 return mdo->bci_to_di(bci);
952 IRT_END
953
954 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
955 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
956 // flag, in case this method triggers classloading which will call into Java.
957 UnlockFlagSaver fs(thread);
958
959 assert(ProfileInterpreter, "must be profiling interpreter");
960 frame fr = thread->last_frame();
961 assert(fr.is_interpreted_frame(), "must come from interpreter");
962 methodHandle method(thread, fr.interpreter_frame_method());
963 Method::build_interpreter_method_data(method, THREAD);
964 if (HAS_PENDING_EXCEPTION) {
965 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
966 CLEAR_PENDING_EXCEPTION;
967 // and fall through...
968 }
969 IRT_END
970
971
972 #ifdef ASSERT
973 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
974 assert(ProfileInterpreter, "must be profiling interpreter");
975
976 MethodData* mdo = method->method_data();
977 assert(mdo != NULL, "must not be null");
978
979 int bci = method->bci_from(bcp);
980
981 address mdp2 = mdo->bci_to_dp(bci);
982 if (mdp != mdp2) {
983 ResourceMark rm;
984 ResetNoHandleMark rnm; // In a LEAF entry.
985 HandleMark hm;
986 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
987 int current_di = mdo->dp_to_di(mdp);
988 int expected_di = mdo->dp_to_di(mdp2);
989 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
990 int expected_approx_bci = mdo->data_at(expected_di)->bci();
991 int approx_bci = -1;
992 if (current_di >= 0) {
993 approx_bci = mdo->data_at(current_di)->bci();
994 }
995 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
996 mdo->print_on(tty);
997 method->print_codes();
998 }
999 assert(mdp == mdp2, "wrong mdp");
1000 IRT_END
1001 #endif // ASSERT
1002
1003 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1004 assert(ProfileInterpreter, "must be profiling interpreter");
1005 ResourceMark rm(thread);
1006 HandleMark hm(thread);
1007 frame fr = thread->last_frame();
1008 assert(fr.is_interpreted_frame(), "must come from interpreter");
1009 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
1010
1011 // Grab a lock to ensure atomic access to setting the return bci and
1012 // the displacement. This can block and GC, invalidating all naked oops.
1013 MutexLocker ml(RetData_lock);
1014
1015 // ProfileData is essentially a wrapper around a derived oop, so we
1016 // need to take the lock before making any ProfileData structures.
1017 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1018 RetData* rdata = data->as_RetData();
1019 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1020 fr.interpreter_frame_set_mdp(new_mdp);
1021 IRT_END
1022
1023 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1024 MethodCounters* mcs = Method::build_method_counters(m, thread);
1025 if (HAS_PENDING_EXCEPTION) {
1026 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1027 CLEAR_PENDING_EXCEPTION;
1028 }
1029 return mcs;
1030 IRT_END
1031
1032
1033 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1034 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1035 // stack traversal automatically takes care of preserving arguments for invoke, so
1036 // this is no longer needed.
1037
1038 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1039 // if this is called during a safepoint
1040
1041 if (JvmtiExport::should_post_single_step()) {
1042 // We are called during regular safepoints and when the VM is
1043 // single stepping. If any thread is marked for single stepping,
1044 // then we may have JVMTI work to do.
1045 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1046 }
1047 IRT_END
1048
1049 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1050 ConstantPoolCacheEntry *cp_entry))
1051
1052 // check the access_flags for the field in the klass
1053
1054 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1055 int index = cp_entry->field_index();
1056 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1057
1058 bool is_static = (obj == NULL);
1059 HandleMark hm(thread);
1060
1061 Handle h_obj;
1062 if (!is_static) {
1063 // non-static field accessors have an object, but we need a handle
1064 h_obj = Handle(thread, obj);
1065 }
1066 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
1067 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
1068 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
1069 IRT_END
1070
1071 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1072 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1073
1074 Klass* k = (Klass*)cp_entry->f1_as_klass();
1075
1076 // check the access_flags for the field in the klass
1077 InstanceKlass* ik = InstanceKlass::cast(k);
1078 int index = cp_entry->field_index();
1079 // bail out if field modifications are not watched
1080 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1081
1082 char sig_type = '\0';
1083
1084 switch(cp_entry->flag_state()) {
1085 case btos: sig_type = 'Z'; break;
1086 case ctos: sig_type = 'C'; break;
1087 case stos: sig_type = 'S'; break;
1088 case itos: sig_type = 'I'; break;
1089 case ftos: sig_type = 'F'; break;
1090 case atos: sig_type = 'L'; break;
1091 case ltos: sig_type = 'J'; break;
1092 case dtos: sig_type = 'D'; break;
1093 default: ShouldNotReachHere(); return;
1094 }
1095 bool is_static = (obj == NULL);
1096
1097 HandleMark hm(thread);
1098 instanceKlassHandle h_klass(thread, k);
1099 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1100 jvalue fvalue;
1101 #ifdef _LP64
1102 fvalue = *value;
1103 #else
1104 // Long/double values are stored unaligned and also noncontiguously with
1105 // tagged stacks. We can't just do a simple assignment even in the non-
1106 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1107 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1108 // We assume that the two halves of longs/doubles are stored in interpreter
1109 // stack slots in platform-endian order.
1110 jlong_accessor u;
1111 jint* newval = (jint*)value;
1112 u.words[0] = newval[0];
1113 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1114 fvalue.j = u.long_value;
1115 #endif // _LP64
1116
1117 Handle h_obj;
1118 if (!is_static) {
1119 // non-static field accessors have an object, but we need a handle
1120 h_obj = Handle(thread, obj);
1121 }
1122
1123 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1124 fid, sig_type, &fvalue);
1125 IRT_END
1126
1127 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1128 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1129 IRT_END
1130
1131
1132 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1133 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1134 IRT_END
1135
1136 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1137 {
1138 return (Interpreter::contains(pc) ? 1 : 0);
1139 }
1140 IRT_END
1141
1142
1143 // Implementation of SignatureHandlerLibrary
1144
1145 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1146 // Dummy definition (else normalization method is defined in CPU
1147 // dependant code)
1148 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1149 return fingerprint;
1150 }
1151 #endif
1152
1153 address SignatureHandlerLibrary::set_handler_blob() {
1154 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1155 if (handler_blob == NULL) {
1156 return NULL;
1157 }
1158 address handler = handler_blob->code_begin();
1159 _handler_blob = handler_blob;
1160 _handler = handler;
1161 return handler;
1162 }
1163
1164 void SignatureHandlerLibrary::initialize() {
1165 if (_fingerprints != NULL) {
1166 return;
1167 }
1168 if (set_handler_blob() == NULL) {
1169 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1170 }
1171
1172 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1173 SignatureHandlerLibrary::buffer_size);
1174 _buffer = bb->code_begin();
1175
1176 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1177 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1178 }
1179
1180 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1181 address handler = _handler;
1182 int insts_size = buffer->pure_insts_size();
1183 if (handler + insts_size > _handler_blob->code_end()) {
1184 // get a new handler blob
1185 handler = set_handler_blob();
1186 }
1187 if (handler != NULL) {
1188 memcpy(handler, buffer->insts_begin(), insts_size);
1189 pd_set_handler(handler);
1190 ICache::invalidate_range(handler, insts_size);
1191 _handler = handler + insts_size;
1192 }
1193 CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler);
1194 return handler;
1195 }
1196
1197 void SignatureHandlerLibrary::add(methodHandle method) {
1198 if (method->signature_handler() == NULL) {
1199 // use slow signature handler if we can't do better
1200 int handler_index = -1;
1201 // check if we can use customized (fast) signature handler
1202 if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1203 // use customized signature handler
1204 MutexLocker mu(SignatureHandlerLibrary_lock);
1205 // make sure data structure is initialized
1206 initialize();
1207 // lookup method signature's fingerprint
1208 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1209 // allow CPU dependant code to optimize the fingerprints for the fast handler
1210 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1211 handler_index = _fingerprints->find(fingerprint);
1212 // create handler if necessary
1213 if (handler_index < 0) {
1214 ResourceMark rm;
1215 ptrdiff_t align_offset = (address)
1216 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1217 CodeBuffer buffer((address)(_buffer + align_offset),
1218 SignatureHandlerLibrary::buffer_size - align_offset);
1219 if (!CodeCacheExtensions::support_dynamic_code()) {
1220 // we need a name for the signature (for lookups or saving)
1221 const int SYMBOL_SIZE = 50;
1222 char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE);
1223 // support for named signatures
1224 jio_snprintf(symbolName, SYMBOL_SIZE,
1225 "native_" UINT64_FORMAT, fingerprint);
1226 buffer.set_name(symbolName);
1227 }
1228 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1229 // copy into code heap
1230 address handler = set_handler(&buffer);
1231 if (handler == NULL) {
1232 // use slow signature handler (without memorizing it in the fingerprints)
1233 } else {
1234 // debugging suppport
1235 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1236 tty->cr();
1237 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1238 _handlers->length(),
1239 (method->is_static() ? "static" : "receiver"),
1240 method->name_and_sig_as_C_string(),
1241 fingerprint,
1242 buffer.insts_size());
1243 if (buffer.insts_size() > 0) {
1244 // buffer may be empty for pregenerated handlers
1245 Disassembler::decode(handler, handler + buffer.insts_size());
1246 }
1247 #ifndef PRODUCT
1248 address rh_begin = Interpreter::result_handler(method()->result_type());
1249 if (CodeCache::contains(rh_begin)) {
1250 // else it might be special platform dependent values
1251 tty->print_cr(" --- associated result handler ---");
1252 address rh_end = rh_begin;
1253 while (*(int*)rh_end != 0) {
1254 rh_end += sizeof(int);
1255 }
1256 Disassembler::decode(rh_begin, rh_end);
1257 } else {
1258 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1259 }
1260 #endif
1261 }
1262 // add handler to library
1263 _fingerprints->append(fingerprint);
1264 _handlers->append(handler);
1265 // set handler index
1266 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1267 handler_index = _fingerprints->length() - 1;
1268 }
1269 }
1270 // Set handler under SignatureHandlerLibrary_lock
1271 if (handler_index < 0) {
1272 // use generic signature handler
1273 method->set_signature_handler(Interpreter::slow_signature_handler());
1274 } else {
1275 // set handler
1276 method->set_signature_handler(_handlers->at(handler_index));
1277 }
1278 } else {
1279 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1280 // use generic signature handler
1281 method->set_signature_handler(Interpreter::slow_signature_handler());
1282 }
1283 }
1284 #ifdef ASSERT
1285 int handler_index = -1;
1286 int fingerprint_index = -2;
1287 {
1288 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1289 // in any way if accessed from multiple threads. To avoid races with another
1290 // thread which may change the arrays in the above, mutex protected block, we
1291 // have to protect this read access here with the same mutex as well!
1292 MutexLocker mu(SignatureHandlerLibrary_lock);
1293 if (_handlers != NULL) {
1294 handler_index = _handlers->find(method->signature_handler());
1295 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1296 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1297 fingerprint_index = _fingerprints->find(fingerprint);
1298 }
1299 }
1300 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1301 handler_index == fingerprint_index, "sanity check");
1302 #endif // ASSERT
1303 }
1304
1305 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1306 int handler_index = -1;
1307 // use customized signature handler
1308 MutexLocker mu(SignatureHandlerLibrary_lock);
1309 // make sure data structure is initialized
1310 initialize();
1311 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1312 handler_index = _fingerprints->find(fingerprint);
1313 // create handler if necessary
1314 if (handler_index < 0) {
1315 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1316 tty->cr();
1317 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1318 _handlers->length(),
1319 handler,
1320 fingerprint);
1321 }
1322 _fingerprints->append(fingerprint);
1323 _handlers->append(handler);
1324 } else {
1325 if (PrintSignatureHandlers) {
1326 tty->cr();
1327 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1328 _handlers->length(),
1329 fingerprint,
1330 _handlers->at(handler_index),
1331 handler);
1332 }
1333 }
1334 }
1335
1336
1337 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1338 address SignatureHandlerLibrary::_handler = NULL;
1339 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1340 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1341 address SignatureHandlerLibrary::_buffer = NULL;
1342
1343
1344 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1345 methodHandle m(thread, method);
1346 assert(m->is_native(), "sanity check");
1347 // lookup native function entry point if it doesn't exist
1348 bool in_base_library;
1349 if (!m->has_native_function()) {
1350 NativeLookup::lookup(m, in_base_library, CHECK);
1351 }
1352 // make sure signature handler is installed
1353 SignatureHandlerLibrary::add(m);
1354 // The interpreter entry point checks the signature handler first,
1355 // before trying to fetch the native entry point and klass mirror.
1356 // We must set the signature handler last, so that multiple processors
1357 // preparing the same method will be sure to see non-null entry & mirror.
1358 IRT_END
1359
1360 #if defined(IA32) || defined(AMD64) || defined(ARM)
1361 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1362 if (src_address == dest_address) {
1363 return;
1364 }
1365 ResetNoHandleMark rnm; // In a LEAF entry.
1366 HandleMark hm;
1367 ResourceMark rm;
1368 frame fr = thread->last_frame();
1369 assert(fr.is_interpreted_frame(), "");
1370 jint bci = fr.interpreter_frame_bci();
1371 methodHandle mh(thread, fr.interpreter_frame_method());
1372 Bytecode_invoke invoke(mh, bci);
1373 ArgumentSizeComputer asc(invoke.signature());
1374 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1375 Copy::conjoint_jbytes(src_address, dest_address,
1376 size_of_arguments * Interpreter::stackElementSize);
1377 IRT_END
1378 #endif
1379
1380 #if INCLUDE_JVMTI
1381 // This is a support of the JVMTI PopFrame interface.
1382 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1383 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1384 // The member_name argument is a saved reference (in local#0) to the member_name.
1385 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1386 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1387 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1388 Method* method, address bcp))
1389 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1390 if (code != Bytecodes::_invokestatic) {
1391 return;
1392 }
1393 ConstantPool* cpool = method->constants();
1394 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1395 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1396 Symbol* mname = cpool->name_ref_at(cp_index);
1397
1398 if (MethodHandles::has_member_arg(cname, mname)) {
1399 oop member_name_oop = (oop) member_name;
1400 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1401 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1402 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1403 }
1404 thread->set_vm_result(member_name_oop);
1405 } else {
1406 thread->set_vm_result(NULL);
1407 }
1408 IRT_END
1409 #endif // INCLUDE_JVMTI