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 "compiler/compileBroker.hpp"
30 #include "compiler/disassembler.hpp"
31 #include "gc_interface/collectedHeap.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "interpreter/interpreterRuntime.hpp"
34 #include "interpreter/linkResolver.hpp"
35 #include "interpreter/templateTable.hpp"
36 #include "memory/oopFactory.hpp"
37 #include "memory/universe.inline.hpp"
38 #include "oops/constantPool.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/methodData.hpp"
41 #include "oops/objArrayKlass.hpp"
42 #include "oops/objArrayOop.inline.hpp"
43 #include "oops/oop.inline.hpp"
44 #include "oops/symbol.hpp"
45 #include "prims/jvmtiExport.hpp"
46 #include "prims/nativeLookup.hpp"
47 #include "runtime/atomic.inline.hpp"
48 #include "runtime/biasedLocking.hpp"
49 #include "runtime/compilationPolicy.hpp"
50 #include "runtime/deoptimization.hpp"
51 #include "runtime/fieldDescriptor.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "runtime/icache.hpp"
54 #include "runtime/interfaceSupport.hpp"
55 #include "runtime/java.hpp"
56 #include "runtime/jfieldIDWorkaround.hpp"
57 #include "runtime/osThread.hpp"
58 #include "runtime/sharedRuntime.hpp"
59 #include "runtime/stubRoutines.hpp"
60 #include "runtime/synchronizer.hpp"
61 #include "runtime/threadCritical.hpp"
62 #include "utilities/events.hpp"
63 #ifdef COMPILER2
64 #include "opto/runtime.hpp"
65 #endif
66
67 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
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 THROW_HANDLE(exception);
313 IRT_END
314
315
316 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
317 // lookup exception klass
318 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
319 if (ProfileTraps) {
320 if (s == vmSymbols::java_lang_ArithmeticException()) {
321 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
322 } else if (s == vmSymbols::java_lang_NullPointerException()) {
323 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
324 }
325 }
326 // create exception
327 Handle exception = Exceptions::new_exception(thread, s, message);
328 thread->set_vm_result(exception());
329 IRT_END
330
331
332 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
333 ResourceMark rm(thread);
334 const char* klass_name = obj->klass()->external_name();
335 // lookup exception klass
336 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
337 if (ProfileTraps) {
338 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
339 }
340 // create exception, with klass name as detail message
341 Handle exception = Exceptions::new_exception(thread, s, klass_name);
342 thread->set_vm_result(exception());
343 IRT_END
344
345
346 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
347 char message[jintAsStringSize];
348 // lookup exception klass
349 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
350 if (ProfileTraps) {
351 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
352 }
353 // create exception
354 sprintf(message, "%d", index);
355 THROW_MSG(s, message);
356 IRT_END
357
358 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
359 JavaThread* thread, oopDesc* obj))
360
361 ResourceMark rm(thread);
362 char* message = SharedRuntime::generate_class_cast_message(
363 thread, obj->klass()->external_name());
364
365 if (ProfileTraps) {
366 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
367 }
368
369 // create exception
370 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
371 IRT_END
372
373 // exception_handler_for_exception(...) returns the continuation address,
374 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
375 // The exception oop is returned to make sure it is preserved over GC (it
376 // is only on the stack if the exception was thrown explicitly via athrow).
377 // During this operation, the expression stack contains the values for the
378 // bci where the exception happened. If the exception was propagated back
379 // from a call, the expression stack contains the values for the bci at the
380 // invoke w/o arguments (i.e., as if one were inside the call).
381 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
382
383 Handle h_exception(thread, exception);
384 methodHandle h_method (thread, method(thread));
385 constantPoolHandle h_constants(thread, h_method->constants());
386 bool should_repeat;
387 int handler_bci;
388 int current_bci = bci(thread);
389
390 if (thread->frames_to_pop_failed_realloc() > 0) {
391 // Allocation of scalar replaced object used in this frame
392 // failed. Unconditionally pop the frame.
393 thread->dec_frames_to_pop_failed_realloc();
394 thread->set_vm_result(h_exception());
395 // If the method is synchronized we already unlocked the monitor
396 // during deoptimization so the interpreter needs to skip it when
397 // the frame is popped.
398 thread->set_do_not_unlock_if_synchronized(true);
399 #ifdef CC_INTERP
400 return (address) -1;
401 #else
402 return Interpreter::remove_activation_entry();
403 #endif
404 }
405
406 // Need to do this check first since when _do_not_unlock_if_synchronized
407 // is set, we don't want to trigger any classloading which may make calls
408 // into java, or surprisingly find a matching exception handler for bci 0
409 // since at this moment the method hasn't been "officially" entered yet.
410 if (thread->do_not_unlock_if_synchronized()) {
411 ResourceMark rm;
412 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
413 thread->set_vm_result(exception);
414 #ifdef CC_INTERP
415 return (address) -1;
416 #else
417 return Interpreter::remove_activation_entry();
418 #endif
419 }
420
421 do {
422 should_repeat = false;
423
424 // assertions
425 #ifdef ASSERT
426 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
427 assert(h_exception->is_oop(), "just checking");
428 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
429 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
430 if (ExitVMOnVerifyError) vm_exit(-1);
431 ShouldNotReachHere();
432 }
433 #endif
434
435 // tracing
436 if (TraceExceptions) {
437 ResourceMark rm(thread);
438 Symbol* message = java_lang_Throwable::detail_message(h_exception());
439 ttyLocker ttyl; // Lock after getting the detail message
440 if (message != NULL) {
441 tty->print_cr("Exception <%s: %s> (" INTPTR_FORMAT ")",
442 h_exception->print_value_string(), message->as_C_string(),
443 (address)h_exception());
444 } else {
445 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")",
446 h_exception->print_value_string(),
447 (address)h_exception());
448 }
449 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
450 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
451 }
452 // Don't go paging in something which won't be used.
453 // else if (extable->length() == 0) {
454 // // disabled for now - interpreter is not using shortcut yet
455 // // (shortcut is not to call runtime if we have no exception handlers)
456 // // warning("performance bug: should not call runtime if method has no exception handlers");
457 // }
458 // for AbortVMOnException flag
459 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
460
461 // exception handler lookup
462 KlassHandle h_klass(THREAD, h_exception->klass());
463 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
464 if (HAS_PENDING_EXCEPTION) {
465 // We threw an exception while trying to find the exception handler.
466 // Transfer the new exception to the exception handle which will
467 // be set into thread local storage, and do another lookup for an
468 // exception handler for this exception, this time starting at the
469 // BCI of the exception handler which caused the exception to be
470 // thrown (bug 4307310).
471 h_exception = Handle(THREAD, PENDING_EXCEPTION);
472 CLEAR_PENDING_EXCEPTION;
473 if (handler_bci >= 0) {
474 current_bci = handler_bci;
475 should_repeat = true;
476 }
477 }
478 } while (should_repeat == true);
479
480 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
481 // time throw or a stack unwinding throw and accordingly notify the debugger
482 if (JvmtiExport::can_post_on_exceptions()) {
483 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
484 }
485
486 #ifdef CC_INTERP
487 address continuation = (address)(intptr_t) handler_bci;
488 #else
489 address continuation = NULL;
490 #endif
491 address handler_pc = NULL;
492 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
493 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
494 // handler in this method, or (b) after a stack overflow there is not yet
495 // enough stack space available to reprotect the stack.
496 #ifndef CC_INTERP
497 continuation = Interpreter::remove_activation_entry();
498 #endif
499 // Count this for compilation purposes
500 h_method->interpreter_throwout_increment(THREAD);
501 } else {
502 // handler in this method => change bci/bcp to handler bci/bcp and continue there
503 handler_pc = h_method->code_base() + handler_bci;
504 #ifndef CC_INTERP
505 set_bcp_and_mdp(handler_pc, thread);
506 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
507 #endif
508 }
509 // notify debugger of an exception catch
510 // (this is good for exceptions caught in native methods as well)
511 if (JvmtiExport::can_post_on_exceptions()) {
512 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
513 }
514
515 thread->set_vm_result(h_exception());
516 return continuation;
517 IRT_END
518
519
520 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
521 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
522 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
523 IRT_END
524
525
526 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
527 THROW(vmSymbols::java_lang_AbstractMethodError());
528 IRT_END
529
530
531 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
532 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
533 IRT_END
534
535
536 //------------------------------------------------------------------------------------------------------------------------
537 // Fields
538 //
539
540 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
541 Thread* THREAD = thread;
542 // resolve field
543 fieldDescriptor info;
544 constantPoolHandle pool(thread, method(thread)->constants());
545 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
546 bytecode == Bytecodes::_putstatic);
547 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
548
549 {
550 JvmtiHideSingleStepping jhss(thread);
551 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
552 bytecode, CHECK);
553 } // end JvmtiHideSingleStepping
554
555 // check if link resolution caused cpCache to be updated
556 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
557 if (cp_cache_entry->is_resolved(bytecode)) return;
558
559 // compute auxiliary field attributes
560 TosState state = as_TosState(info.field_type());
561
562 // We need to delay resolving put instructions on final fields
563 // until we actually invoke one. This is required so we throw
564 // exceptions at the correct place. If we do not resolve completely
565 // in the current pass, leaving the put_code set to zero will
566 // cause the next put instruction to reresolve.
567 Bytecodes::Code put_code = (Bytecodes::Code)0;
568
569 // We also need to delay resolving getstatic instructions until the
570 // class is intitialized. This is required so that access to the static
571 // field will call the initialization function every time until the class
572 // is completely initialized ala. in 2.17.5 in JVM Specification.
573 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
574 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
575 !klass->is_initialized());
576 Bytecodes::Code get_code = (Bytecodes::Code)0;
577
578 if (!uninitialized_static) {
579 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
580 if (is_put || !info.access_flags().is_final()) {
581 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
582 }
583 }
584
585 cp_cache_entry->set_field(
586 get_code,
587 put_code,
588 info.field_holder(),
589 info.index(),
590 info.offset(),
591 state,
592 info.access_flags().is_final(),
593 info.access_flags().is_volatile(),
594 pool->pool_holder()
595 );
596 }
597
598
599 //------------------------------------------------------------------------------------------------------------------------
600 // Synchronization
601 //
602 // The interpreter's synchronization code is factored out so that it can
603 // be shared by method invocation and synchronized blocks.
604 //%note synchronization_3
605
606 //%note monitor_1
607 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
608 #ifdef ASSERT
609 thread->last_frame().interpreter_frame_verify_monitor(elem);
610 #endif
611 if (PrintBiasedLockingStatistics) {
612 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
613 }
614 Handle h_obj(thread, elem->obj());
615 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
616 "must be NULL or an object");
617 if (UseBiasedLocking) {
618 // Retry fast entry if bias is revoked to avoid unnecessary inflation
619 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
620 } else {
621 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
622 }
623 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
624 "must be NULL or an object");
625 #ifdef ASSERT
626 thread->last_frame().interpreter_frame_verify_monitor(elem);
627 #endif
628 IRT_END
629
630
631 //%note monitor_1
632 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
633 #ifdef ASSERT
634 thread->last_frame().interpreter_frame_verify_monitor(elem);
635 #endif
636 Handle h_obj(thread, elem->obj());
637 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
638 "must be NULL or an object");
639 if (elem == NULL || h_obj()->is_unlocked()) {
640 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
641 }
642 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
643 // Free entry. This must be done here, since a pending exception might be installed on
644 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
645 elem->set_obj(NULL);
646 #ifdef ASSERT
647 thread->last_frame().interpreter_frame_verify_monitor(elem);
648 #endif
649 IRT_END
650
651
652 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
653 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
654 IRT_END
655
656
657 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
658 // Returns an illegal exception to install into the current thread. The
659 // pending_exception flag is cleared so normal exception handling does not
660 // trigger. Any current installed exception will be overwritten. This
661 // method will be called during an exception unwind.
662
663 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
664 Handle exception(thread, thread->vm_result());
665 assert(exception() != NULL, "vm result should be set");
666 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
667 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
668 exception = get_preinitialized_exception(
669 SystemDictionary::IllegalMonitorStateException_klass(),
670 CATCH);
671 }
672 thread->set_vm_result(exception());
673 IRT_END
674
675
676 //------------------------------------------------------------------------------------------------------------------------
677 // Invokes
678
679 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
680 return method->orig_bytecode_at(method->bci_from(bcp));
681 IRT_END
682
683 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
684 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
685 IRT_END
686
687 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
688 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
689 IRT_END
690
691 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
692 Thread* THREAD = thread;
693 // extract receiver from the outgoing argument list if necessary
694 Handle receiver(thread, NULL);
695 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
696 ResourceMark rm(thread);
697 methodHandle m (thread, method(thread));
698 Bytecode_invoke call(m, bci(thread));
699 Symbol* signature = call.signature();
700 receiver = Handle(thread,
701 thread->last_frame().interpreter_callee_receiver(signature));
702 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
703 "sanity check");
704 assert(receiver.is_null() ||
705 !Universe::heap()->is_in_reserved(receiver->klass()),
706 "sanity check");
707 }
708
709 // resolve method
710 CallInfo info;
711 constantPoolHandle pool(thread, method(thread)->constants());
712
713 {
714 JvmtiHideSingleStepping jhss(thread);
715 LinkResolver::resolve_invoke(info, receiver, pool,
716 get_index_u2_cpcache(thread, bytecode), bytecode,
717 CHECK);
718 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
719 int retry_count = 0;
720 while (info.resolved_method()->is_old()) {
721 // It is very unlikely that method is redefined more than 100 times
722 // in the middle of resolve. If it is looping here more than 100 times
723 // means then there could be a bug here.
724 guarantee((retry_count++ < 100),
725 "Could not resolve to latest version of redefined method");
726 // method is redefined in the middle of resolve so re-try.
727 LinkResolver::resolve_invoke(info, receiver, pool,
728 get_index_u2_cpcache(thread, bytecode), bytecode,
729 CHECK);
730 }
731 }
732 } // end JvmtiHideSingleStepping
733
734 // check if link resolution caused cpCache to be updated
735 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
736 if (cp_cache_entry->is_resolved(bytecode)) return;
737
738 if (bytecode == Bytecodes::_invokeinterface) {
739 if (TraceItables && Verbose) {
740 ResourceMark rm(thread);
741 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
742 }
743 }
744 #ifdef ASSERT
745 if (bytecode == Bytecodes::_invokeinterface) {
746 if (info.resolved_method()->method_holder() ==
747 SystemDictionary::Object_klass()) {
748 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
749 // (see also CallInfo::set_interface for details)
750 assert(info.call_kind() == CallInfo::vtable_call ||
751 info.call_kind() == CallInfo::direct_call, "");
752 methodHandle rm = info.resolved_method();
753 assert(rm->is_final() || info.has_vtable_index(),
754 "should have been set already");
755 } else if (!info.resolved_method()->has_itable_index()) {
756 // Resolved something like CharSequence.toString. Use vtable not itable.
757 assert(info.call_kind() != CallInfo::itable_call, "");
758 } else {
759 // Setup itable entry
760 assert(info.call_kind() == CallInfo::itable_call, "");
761 int index = info.resolved_method()->itable_index();
762 assert(info.itable_index() == index, "");
763 }
764 } else {
765 assert(info.call_kind() == CallInfo::direct_call ||
766 info.call_kind() == CallInfo::vtable_call, "");
767 }
768 #endif
769 switch (info.call_kind()) {
770 case CallInfo::direct_call:
771 cp_cache_entry->set_direct_call(
772 bytecode,
773 info.resolved_method());
774 break;
775 case CallInfo::vtable_call:
776 cp_cache_entry->set_vtable_call(
777 bytecode,
778 info.resolved_method(),
779 info.vtable_index());
780 break;
781 case CallInfo::itable_call:
782 cp_cache_entry->set_itable_call(
783 bytecode,
784 info.resolved_method(),
785 info.itable_index());
786 break;
787 default: ShouldNotReachHere();
788 }
789 }
790
791
792 // First time execution: Resolve symbols, create a permanent MethodType object.
793 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
794 Thread* THREAD = thread;
795 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
796
797 // resolve method
798 CallInfo info;
799 constantPoolHandle pool(thread, method(thread)->constants());
800 {
801 JvmtiHideSingleStepping jhss(thread);
802 LinkResolver::resolve_invoke(info, Handle(), pool,
803 get_index_u2_cpcache(thread, bytecode), bytecode,
804 CHECK);
805 } // end JvmtiHideSingleStepping
806
807 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
808 cp_cache_entry->set_method_handle(pool, info);
809 }
810
811 // First time execution: Resolve symbols, create a permanent CallSite object.
812 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
813 Thread* THREAD = thread;
814 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
815
816 //TO DO: consider passing BCI to Java.
817 // int caller_bci = method(thread)->bci_from(bcp(thread));
818
819 // resolve method
820 CallInfo info;
821 constantPoolHandle pool(thread, method(thread)->constants());
822 int index = get_index_u4(thread, bytecode);
823 {
824 JvmtiHideSingleStepping jhss(thread);
825 LinkResolver::resolve_invoke(info, Handle(), pool,
826 index, bytecode, CHECK);
827 } // end JvmtiHideSingleStepping
828
829 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
830 cp_cache_entry->set_dynamic_call(pool, info);
831 }
832
833 // This function is the interface to the assembly code. It returns the resolved
834 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
835 // This function will check for redefinition!
836 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
837 switch (bytecode) {
838 case Bytecodes::_getstatic:
839 case Bytecodes::_putstatic:
840 case Bytecodes::_getfield:
841 case Bytecodes::_putfield:
842 resolve_get_put(thread, bytecode);
843 break;
844 case Bytecodes::_invokevirtual:
845 case Bytecodes::_invokespecial:
846 case Bytecodes::_invokestatic:
847 case Bytecodes::_invokeinterface:
848 resolve_invoke(thread, bytecode);
849 break;
850 case Bytecodes::_invokehandle:
851 resolve_invokehandle(thread);
852 break;
853 case Bytecodes::_invokedynamic:
854 resolve_invokedynamic(thread);
855 break;
856 default:
857 fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(bytecode)));
858 break;
859 }
860 }
861 IRT_END
862
863 //------------------------------------------------------------------------------------------------------------------------
864 // Miscellaneous
865
866
867 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
868 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
869 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
870 if (branch_bcp != NULL && nm != NULL) {
871 // This was a successful request for an OSR nmethod. Because
872 // frequency_counter_overflow_inner ends with a safepoint check,
873 // nm could have been unloaded so look it up again. It's unsafe
874 // to examine nm directly since it might have been freed and used
875 // for something else.
876 frame fr = thread->last_frame();
877 Method* method = fr.interpreter_frame_method();
878 int bci = method->bci_from(fr.interpreter_frame_bcp());
879 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
880 }
881 #ifndef PRODUCT
882 if (TraceOnStackReplacement) {
883 if (nm != NULL) {
884 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
885 nm->print();
886 }
887 }
888 #endif
889 return nm;
890 }
891
892 IRT_ENTRY(nmethod*,
893 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
894 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
895 // flag, in case this method triggers classloading which will call into Java.
896 UnlockFlagSaver fs(thread);
897
898 frame fr = thread->last_frame();
899 assert(fr.is_interpreted_frame(), "must come from interpreter");
900 methodHandle method(thread, fr.interpreter_frame_method());
901 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
902 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
903
904 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
905 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
906 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
907
908 if (osr_nm != NULL) {
909 // We may need to do on-stack replacement which requires that no
910 // monitors in the activation are biased because their
911 // BasicObjectLocks will need to migrate during OSR. Force
912 // unbiasing of all monitors in the activation now (even though
913 // the OSR nmethod might be invalidated) because we don't have a
914 // safepoint opportunity later once the migration begins.
915 if (UseBiasedLocking) {
916 ResourceMark rm;
917 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
918 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
919 kptr < fr.interpreter_frame_monitor_begin();
920 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
921 if( kptr->obj() != NULL ) {
922 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
923 }
924 }
925 BiasedLocking::revoke(objects_to_revoke);
926 }
927 }
928 return osr_nm;
929 IRT_END
930
931 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
932 assert(ProfileInterpreter, "must be profiling interpreter");
933 int bci = method->bci_from(cur_bcp);
934 MethodData* mdo = method->method_data();
935 if (mdo == NULL) return 0;
936 return mdo->bci_to_di(bci);
937 IRT_END
938
939 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
940 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
941 // flag, in case this method triggers classloading which will call into Java.
942 UnlockFlagSaver fs(thread);
943
944 assert(ProfileInterpreter, "must be profiling interpreter");
945 frame fr = thread->last_frame();
946 assert(fr.is_interpreted_frame(), "must come from interpreter");
947 methodHandle method(thread, fr.interpreter_frame_method());
948 Method::build_interpreter_method_data(method, THREAD);
949 if (HAS_PENDING_EXCEPTION) {
950 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
951 CLEAR_PENDING_EXCEPTION;
952 // and fall through...
953 }
954 IRT_END
955
956
957 #ifdef ASSERT
958 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
959 assert(ProfileInterpreter, "must be profiling interpreter");
960
961 MethodData* mdo = method->method_data();
962 assert(mdo != NULL, "must not be null");
963
964 int bci = method->bci_from(bcp);
965
966 address mdp2 = mdo->bci_to_dp(bci);
967 if (mdp != mdp2) {
968 ResourceMark rm;
969 ResetNoHandleMark rnm; // In a LEAF entry.
970 HandleMark hm;
971 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
972 int current_di = mdo->dp_to_di(mdp);
973 int expected_di = mdo->dp_to_di(mdp2);
974 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
975 int expected_approx_bci = mdo->data_at(expected_di)->bci();
976 int approx_bci = -1;
977 if (current_di >= 0) {
978 approx_bci = mdo->data_at(current_di)->bci();
979 }
980 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
981 mdo->print_on(tty);
982 method->print_codes();
983 }
984 assert(mdp == mdp2, "wrong mdp");
985 IRT_END
986 #endif // ASSERT
987
988 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
989 assert(ProfileInterpreter, "must be profiling interpreter");
990 ResourceMark rm(thread);
991 HandleMark hm(thread);
992 frame fr = thread->last_frame();
993 assert(fr.is_interpreted_frame(), "must come from interpreter");
994 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
995
996 // Grab a lock to ensure atomic access to setting the return bci and
997 // the displacement. This can block and GC, invalidating all naked oops.
998 MutexLocker ml(RetData_lock);
999
1000 // ProfileData is essentially a wrapper around a derived oop, so we
1001 // need to take the lock before making any ProfileData structures.
1002 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1003 RetData* rdata = data->as_RetData();
1004 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1005 fr.interpreter_frame_set_mdp(new_mdp);
1006 IRT_END
1007
1008 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1009 MethodCounters* mcs = Method::build_method_counters(m, thread);
1010 if (HAS_PENDING_EXCEPTION) {
1011 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1012 CLEAR_PENDING_EXCEPTION;
1013 }
1014 return mcs;
1015 IRT_END
1016
1017
1018 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1019 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1020 // stack traversal automatically takes care of preserving arguments for invoke, so
1021 // this is no longer needed.
1022
1023 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1024 // if this is called during a safepoint
1025
1026 if (JvmtiExport::should_post_single_step()) {
1027 // We are called during regular safepoints and when the VM is
1028 // single stepping. If any thread is marked for single stepping,
1029 // then we may have JVMTI work to do.
1030 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1031 }
1032 IRT_END
1033
1034 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1035 ConstantPoolCacheEntry *cp_entry))
1036
1037 // check the access_flags for the field in the klass
1038
1039 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1040 int index = cp_entry->field_index();
1041 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1042
1043 bool is_static = (obj == NULL);
1044 HandleMark hm(thread);
1045
1046 Handle h_obj;
1047 if (!is_static) {
1048 // non-static field accessors have an object, but we need a handle
1049 h_obj = Handle(thread, obj);
1050 }
1051 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
1052 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
1053 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
1054 IRT_END
1055
1056 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1057 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1058
1059 Klass* k = (Klass*)cp_entry->f1_as_klass();
1060
1061 // check the access_flags for the field in the klass
1062 InstanceKlass* ik = InstanceKlass::cast(k);
1063 int index = cp_entry->field_index();
1064 // bail out if field modifications are not watched
1065 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1066
1067 char sig_type = '\0';
1068
1069 switch(cp_entry->flag_state()) {
1070 case btos: sig_type = 'Z'; break;
1071 case ctos: sig_type = 'C'; break;
1072 case stos: sig_type = 'S'; break;
1073 case itos: sig_type = 'I'; break;
1074 case ftos: sig_type = 'F'; break;
1075 case atos: sig_type = 'L'; break;
1076 case ltos: sig_type = 'J'; break;
1077 case dtos: sig_type = 'D'; break;
1078 default: ShouldNotReachHere(); return;
1079 }
1080 bool is_static = (obj == NULL);
1081
1082 HandleMark hm(thread);
1083 instanceKlassHandle h_klass(thread, k);
1084 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1085 jvalue fvalue;
1086 #ifdef _LP64
1087 fvalue = *value;
1088 #else
1089 // Long/double values are stored unaligned and also noncontiguously with
1090 // tagged stacks. We can't just do a simple assignment even in the non-
1091 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1092 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1093 // We assume that the two halves of longs/doubles are stored in interpreter
1094 // stack slots in platform-endian order.
1095 jlong_accessor u;
1096 jint* newval = (jint*)value;
1097 u.words[0] = newval[0];
1098 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1099 fvalue.j = u.long_value;
1100 #endif // _LP64
1101
1102 Handle h_obj;
1103 if (!is_static) {
1104 // non-static field accessors have an object, but we need a handle
1105 h_obj = Handle(thread, obj);
1106 }
1107
1108 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1109 fid, sig_type, &fvalue);
1110 IRT_END
1111
1112 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1113 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1114 IRT_END
1115
1116
1117 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1118 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1119 IRT_END
1120
1121 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1122 {
1123 return (Interpreter::contains(pc) ? 1 : 0);
1124 }
1125 IRT_END
1126
1127
1128 // Implementation of SignatureHandlerLibrary
1129
1130 address SignatureHandlerLibrary::set_handler_blob() {
1131 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1132 if (handler_blob == NULL) {
1133 return NULL;
1134 }
1135 address handler = handler_blob->code_begin();
1136 _handler_blob = handler_blob;
1137 _handler = handler;
1138 return handler;
1139 }
1140
1141 void SignatureHandlerLibrary::initialize() {
1142 if (_fingerprints != NULL) {
1143 return;
1144 }
1145 if (set_handler_blob() == NULL) {
1146 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1147 }
1148
1149 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1150 SignatureHandlerLibrary::buffer_size);
1151 _buffer = bb->code_begin();
1152
1153 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1154 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1155 }
1156
1157 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1158 address handler = _handler;
1159 int insts_size = buffer->pure_insts_size();
1160 if (handler + insts_size > _handler_blob->code_end()) {
1161 // get a new handler blob
1162 handler = set_handler_blob();
1163 }
1164 if (handler != NULL) {
1165 memcpy(handler, buffer->insts_begin(), insts_size);
1166 pd_set_handler(handler);
1167 ICache::invalidate_range(handler, insts_size);
1168 _handler = handler + insts_size;
1169 }
1170 return handler;
1171 }
1172
1173 void SignatureHandlerLibrary::add(methodHandle method) {
1174 if (method->signature_handler() == NULL) {
1175 // use slow signature handler if we can't do better
1176 int handler_index = -1;
1177 // check if we can use customized (fast) signature handler
1178 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1179 // use customized signature handler
1180 MutexLocker mu(SignatureHandlerLibrary_lock);
1181 // make sure data structure is initialized
1182 initialize();
1183 // lookup method signature's fingerprint
1184 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1185 handler_index = _fingerprints->find(fingerprint);
1186 // create handler if necessary
1187 if (handler_index < 0) {
1188 ResourceMark rm;
1189 ptrdiff_t align_offset = (address)
1190 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1191 CodeBuffer buffer((address)(_buffer + align_offset),
1192 SignatureHandlerLibrary::buffer_size - align_offset);
1193 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1194 // copy into code heap
1195 address handler = set_handler(&buffer);
1196 if (handler == NULL) {
1197 // use slow signature handler
1198 } else {
1199 // debugging suppport
1200 if (PrintSignatureHandlers) {
1201 tty->cr();
1202 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1203 _handlers->length(),
1204 (method->is_static() ? "static" : "receiver"),
1205 method->name_and_sig_as_C_string(),
1206 fingerprint,
1207 buffer.insts_size());
1208 Disassembler::decode(handler, handler + buffer.insts_size());
1209 #ifndef PRODUCT
1210 tty->print_cr(" --- associated result handler ---");
1211 address rh_begin = Interpreter::result_handler(method()->result_type());
1212 address rh_end = rh_begin;
1213 while (*(int*)rh_end != 0) {
1214 rh_end += sizeof(int);
1215 }
1216 Disassembler::decode(rh_begin, rh_end);
1217 #endif
1218 }
1219 // add handler to library
1220 _fingerprints->append(fingerprint);
1221 _handlers->append(handler);
1222 // set handler index
1223 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1224 handler_index = _fingerprints->length() - 1;
1225 }
1226 }
1227 // Set handler under SignatureHandlerLibrary_lock
1228 if (handler_index < 0) {
1229 // use generic signature handler
1230 method->set_signature_handler(Interpreter::slow_signature_handler());
1231 } else {
1232 // set handler
1233 method->set_signature_handler(_handlers->at(handler_index));
1234 }
1235 } else {
1236 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1237 // use generic signature handler
1238 method->set_signature_handler(Interpreter::slow_signature_handler());
1239 }
1240 }
1241 #ifdef ASSERT
1242 int handler_index = -1;
1243 int fingerprint_index = -2;
1244 {
1245 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1246 // in any way if accessed from multiple threads. To avoid races with another
1247 // thread which may change the arrays in the above, mutex protected block, we
1248 // have to protect this read access here with the same mutex as well!
1249 MutexLocker mu(SignatureHandlerLibrary_lock);
1250 if (_handlers != NULL) {
1251 handler_index = _handlers->find(method->signature_handler());
1252 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
1253 }
1254 }
1255 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1256 handler_index == fingerprint_index, "sanity check");
1257 #endif // ASSERT
1258 }
1259
1260
1261 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1262 address SignatureHandlerLibrary::_handler = NULL;
1263 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1264 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1265 address SignatureHandlerLibrary::_buffer = NULL;
1266
1267
1268 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1269 methodHandle m(thread, method);
1270 assert(m->is_native(), "sanity check");
1271 // lookup native function entry point if it doesn't exist
1272 bool in_base_library;
1273 if (!m->has_native_function()) {
1274 NativeLookup::lookup(m, in_base_library, CHECK);
1275 }
1276 // make sure signature handler is installed
1277 SignatureHandlerLibrary::add(m);
1278 // The interpreter entry point checks the signature handler first,
1279 // before trying to fetch the native entry point and klass mirror.
1280 // We must set the signature handler last, so that multiple processors
1281 // preparing the same method will be sure to see non-null entry & mirror.
1282 IRT_END
1283
1284 #if defined(IA32) || defined(AMD64) || defined(ARM)
1285 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1286 if (src_address == dest_address) {
1287 return;
1288 }
1289 ResetNoHandleMark rnm; // In a LEAF entry.
1290 HandleMark hm;
1291 ResourceMark rm;
1292 frame fr = thread->last_frame();
1293 assert(fr.is_interpreted_frame(), "");
1294 jint bci = fr.interpreter_frame_bci();
1295 methodHandle mh(thread, fr.interpreter_frame_method());
1296 Bytecode_invoke invoke(mh, bci);
1297 ArgumentSizeComputer asc(invoke.signature());
1298 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1299 Copy::conjoint_jbytes(src_address, dest_address,
1300 size_of_arguments * Interpreter::stackElementSize);
1301 IRT_END
1302 #endif
1303
1304 #if INCLUDE_JVMTI
1305 // This is a support of the JVMTI PopFrame interface.
1306 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1307 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1308 // The member_name argument is a saved reference (in local#0) to the member_name.
1309 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1310 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1311 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1312 Method* method, address bcp))
1313 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1314 if (code != Bytecodes::_invokestatic) {
1315 return;
1316 }
1317 ConstantPool* cpool = method->constants();
1318 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1319 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1320 Symbol* mname = cpool->name_ref_at(cp_index);
1321
1322 if (MethodHandles::has_member_arg(cname, mname)) {
1323 oop member_name_oop = (oop) member_name;
1324 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1325 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1326 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1327 }
1328 thread->set_vm_result(member_name_oop);
1329 } else {
1330 thread->set_vm_result(NULL);
1331 }
1332 IRT_END
1333 #endif // INCLUDE_JVMTI