1 /*
2 * Copyright (c) 1997, 2014, 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/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "gc_interface/collectedHeap.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "interpreter/templateTable.hpp"
35 #include "memory/oopFactory.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/constantPool.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/methodData.hpp"
40 #include "oops/objArrayKlass.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "oops/symbol.hpp"
43 #include "prims/jvmtiExport.hpp"
44 #include "prims/nativeLookup.hpp"
45 #include "runtime/atomic.inline.hpp"
46 #include "runtime/biasedLocking.hpp"
47 #include "runtime/compilationPolicy.hpp"
48 #include "runtime/deoptimization.hpp"
49 #include "runtime/fieldDescriptor.hpp"
50 #include "runtime/handles.inline.hpp"
51 #include "runtime/icache.hpp"
52 #include "runtime/interfaceSupport.hpp"
53 #include "runtime/java.hpp"
54 #include "runtime/jfieldIDWorkaround.hpp"
55 #include "runtime/osThread.hpp"
56 #include "runtime/sharedRuntime.hpp"
57 #include "runtime/stubRoutines.hpp"
58 #include "runtime/synchronizer.hpp"
59 #include "runtime/threadCritical.hpp"
60 #include "utilities/events.hpp"
61 #ifdef COMPILER2
62 #include "opto/runtime.hpp"
63 #endif
64
65 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
66
67 class UnlockFlagSaver {
68 private:
69 JavaThread* _thread;
70 bool _do_not_unlock;
71 public:
72 UnlockFlagSaver(JavaThread* t) {
73 _thread = t;
74 _do_not_unlock = t->do_not_unlock_if_synchronized();
75 t->set_do_not_unlock_if_synchronized(false);
76 }
77 ~UnlockFlagSaver() {
78 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
79 }
80 };
81
82 //------------------------------------------------------------------------------------------------------------------------
83 // State accessors
84
85 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
86 last_frame(thread).interpreter_frame_set_bcp(bcp);
87 if (ProfileInterpreter) {
88 // ProfileTraps uses MDOs independently of ProfileInterpreter.
89 // That is why we must check both ProfileInterpreter and mdo != NULL.
90 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
91 if (mdo != NULL) {
92 NEEDS_CLEANUP;
93 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
94 }
95 }
96 }
97
98 //------------------------------------------------------------------------------------------------------------------------
99 // Constants
100
101
102 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
103 // access constant pool
104 ConstantPool* pool = method(thread)->constants();
105 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
106 constantTag tag = pool->tag_at(index);
107
108 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
109 Klass* klass = pool->klass_at(index, CHECK);
110 oop java_class = klass->java_mirror();
111 thread->set_vm_result(java_class);
112 IRT_END
113
114 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
115 assert(bytecode == Bytecodes::_fast_aldc ||
116 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
117 ResourceMark rm(thread);
118 methodHandle m (thread, method(thread));
119 Bytecode_loadconstant ldc(m, bci(thread));
120 oop result = ldc.resolve_constant(CHECK);
121 #ifdef ASSERT
122 {
123 // The bytecode wrappers aren't GC-safe so construct a new one
124 Bytecode_loadconstant ldc2(m, bci(thread));
125 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
126 assert(result == coop, "expected result for assembly code");
127 }
128 #endif
129 thread->set_vm_result(result);
130 }
131 IRT_END
132
133
134 //------------------------------------------------------------------------------------------------------------------------
135 // Allocation
136
137 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
138 Klass* k_oop = pool->klass_at(index, CHECK);
139 instanceKlassHandle klass (THREAD, k_oop);
140
141 // Make sure we are not instantiating an abstract klass
142 klass->check_valid_for_instantiation(true, CHECK);
143
144 // Make sure klass is initialized
145 klass->initialize(CHECK);
146
147 // At this point the class may not be fully initialized
148 // because of recursive initialization. If it is fully
149 // initialized & has_finalized is not set, we rewrite
150 // it into its fast version (Note: no locking is needed
151 // here since this is an atomic byte write and can be
152 // done more than once).
153 //
154 // Note: In case of classes with has_finalized we don't
155 // rewrite since that saves us an extra check in
156 // the fast version which then would call the
157 // slow version anyway (and do a call back into
158 // Java).
159 // If we have a breakpoint, then we don't rewrite
160 // because the _breakpoint bytecode would be lost.
161 oop obj = klass->allocate_instance(CHECK);
162 thread->set_vm_result(obj);
163 IRT_END
164
165
166 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
167 oop obj = oopFactory::new_typeArray(type, size, CHECK);
168 thread->set_vm_result(obj);
169 IRT_END
170
171
172 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
173 // Note: no oopHandle for pool & klass needed since they are not used
174 // anymore after new_objArray() and no GC can happen before.
175 // (This may have to change if this code changes!)
176 Klass* klass = pool->klass_at(index, CHECK);
177 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
178 thread->set_vm_result(obj);
179 IRT_END
180
181
182 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
183 // We may want to pass in more arguments - could make this slightly faster
184 ConstantPool* constants = method(thread)->constants();
185 int i = get_index_u2(thread, Bytecodes::_multianewarray);
186 Klass* klass = constants->klass_at(i, CHECK);
187 int nof_dims = number_of_dimensions(thread);
188 assert(klass->is_klass(), "not a class");
189 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
190
191 // We must create an array of jints to pass to multi_allocate.
192 ResourceMark rm(thread);
193 const int small_dims = 10;
194 jint dim_array[small_dims];
195 jint *dims = &dim_array[0];
196 if (nof_dims > small_dims) {
197 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
198 }
199 for (int index = 0; index < nof_dims; index++) {
200 // offset from first_size_address is addressed as local[index]
201 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
202 dims[index] = first_size_address[n];
203 }
204 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
205 thread->set_vm_result(obj);
206 IRT_END
207
208
209 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
210 assert(obj->is_oop(), "must be a valid oop");
211 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
212 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
213 IRT_END
214
215
216 // Quicken instance-of and check-cast bytecodes
217 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
218 // Force resolving; quicken the bytecode
219 int which = get_index_u2(thread, Bytecodes::_checkcast);
220 ConstantPool* cpool = method(thread)->constants();
221 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
222 // program we might have seen an unquick'd bytecode in the interpreter but have another
223 // thread quicken the bytecode before we get here.
224 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
225 Klass* klass = cpool->klass_at(which, CHECK);
226 thread->set_vm_result_2(klass);
227 IRT_END
228
229
230 //------------------------------------------------------------------------------------------------------------------------
231 // Exceptions
232
233 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
234 methodHandle trap_method, int trap_bci, TRAPS) {
235 if (trap_method.not_null()) {
236 MethodData* trap_mdo = trap_method->method_data();
237 if (trap_mdo == NULL) {
238 Method::build_interpreter_method_data(trap_method, THREAD);
239 if (HAS_PENDING_EXCEPTION) {
240 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
241 "we expect only an OOM error here");
242 CLEAR_PENDING_EXCEPTION;
243 }
244 trap_mdo = trap_method->method_data();
245 // and fall through...
246 }
247 if (trap_mdo != NULL) {
248 // Update per-method count of trap events. The interpreter
249 // is updating the MDO to simulate the effect of compiler traps.
250 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
251 }
252 }
253 }
254
255 // Assume the compiler is (or will be) interested in this event.
256 // If necessary, create an MDO to hold the information, and record it.
257 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
258 assert(ProfileTraps, "call me only if profiling");
259 methodHandle trap_method(thread, method(thread));
260 int trap_bci = trap_method->bci_from(bcp(thread));
261 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
262 }
263
264 #ifdef CC_INTERP
265 // As legacy note_trap, but we have more arguments.
266 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
267 methodHandle trap_method(method);
268 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
269 IRT_END
270
271 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
272 // for each exception.
273 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
274 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
275 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
276 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
277 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
278 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
279 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
280 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
281 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
282 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
283 #endif // CC_INTERP
284
285
286 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
287 // get klass
288 InstanceKlass* klass = InstanceKlass::cast(k);
289 assert(klass->is_initialized(),
290 "this klass should have been initialized during VM initialization");
291 // create instance - do not call constructor since we may have no
292 // (java) stack space left (should assert constructor is empty)
293 Handle exception;
294 oop exception_oop = klass->allocate_instance(CHECK_(exception));
295 exception = Handle(THREAD, exception_oop);
296 if (StackTraceInThrowable) {
297 java_lang_Throwable::fill_in_stack_trace(exception);
298 }
299 return exception;
300 }
301
302 // Special handling for stack overflow: since we don't have any (java) stack
303 // space left we use the pre-allocated & pre-initialized StackOverflowError
304 // klass to create an stack overflow error instance. We do not call its
305 // constructor for the same reason (it is empty, anyway).
306 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
307 Handle exception = get_preinitialized_exception(
308 SystemDictionary::StackOverflowError_klass(),
309 CHECK);
310 THROW_HANDLE(exception);
311 IRT_END
312
313
314 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
315 // lookup exception klass
316 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
317 if (ProfileTraps) {
318 if (s == vmSymbols::java_lang_ArithmeticException()) {
319 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
320 } else if (s == vmSymbols::java_lang_NullPointerException()) {
321 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
322 }
323 }
324 // create exception
325 Handle exception = Exceptions::new_exception(thread, s, message);
326 thread->set_vm_result(exception());
327 IRT_END
328
329
330 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
331 ResourceMark rm(thread);
332 const char* klass_name = obj->klass()->external_name();
333 // lookup exception klass
334 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
335 if (ProfileTraps) {
336 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
337 }
338 // create exception, with klass name as detail message
339 Handle exception = Exceptions::new_exception(thread, s, klass_name);
340 thread->set_vm_result(exception());
341 IRT_END
342
343
344 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
345 char message[jintAsStringSize];
346 // lookup exception klass
347 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
348 if (ProfileTraps) {
349 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
350 }
351 // create exception
352 sprintf(message, "%d", index);
353 THROW_MSG(s, message);
354 IRT_END
355
356 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
357 JavaThread* thread, oopDesc* obj))
358
359 ResourceMark rm(thread);
360 char* message = SharedRuntime::generate_class_cast_message(
361 thread, obj->klass()->external_name());
362
363 if (ProfileTraps) {
364 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
365 }
366
367 // create exception
368 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
369 IRT_END
370
371 // exception_handler_for_exception(...) returns the continuation address,
372 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
373 // The exception oop is returned to make sure it is preserved over GC (it
374 // is only on the stack if the exception was thrown explicitly via athrow).
375 // During this operation, the expression stack contains the values for the
376 // bci where the exception happened. If the exception was propagated back
377 // from a call, the expression stack contains the values for the bci at the
378 // invoke w/o arguments (i.e., as if one were inside the call).
379 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
380
381 Handle h_exception(thread, exception);
382 methodHandle h_method (thread, method(thread));
383 constantPoolHandle h_constants(thread, h_method->constants());
384 bool should_repeat;
385 int handler_bci;
386 int current_bci = bci(thread);
387
388 if (thread->frames_to_pop_failed_realloc() > 0) {
389 // Allocation of scalar replaced object used in this frame
390 // failed. Unconditionally pop the frame.
391 thread->dec_frames_to_pop_failed_realloc();
392 thread->set_vm_result(h_exception());
393 // If the method is synchronized we already unlocked the monitor
394 // during deoptimization so the interpreter needs to skip it when
395 // the frame is popped.
396 thread->set_do_not_unlock_if_synchronized(true);
397 #ifdef CC_INTERP
398 return (address) -1;
399 #else
400 return Interpreter::remove_activation_entry();
401 #endif
402 }
403
404 // Need to do this check first since when _do_not_unlock_if_synchronized
405 // is set, we don't want to trigger any classloading which may make calls
406 // into java, or surprisingly find a matching exception handler for bci 0
407 // since at this moment the method hasn't been "officially" entered yet.
408 if (thread->do_not_unlock_if_synchronized()) {
409 ResourceMark rm;
410 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
411 thread->set_vm_result(exception);
412 #ifdef CC_INTERP
413 return (address) -1;
414 #else
415 return Interpreter::remove_activation_entry();
416 #endif
417 }
418
419 do {
420 should_repeat = false;
421
422 // assertions
423 #ifdef ASSERT
424 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
425 assert(h_exception->is_oop(), "just checking");
426 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
427 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
428 if (ExitVMOnVerifyError) vm_exit(-1);
429 ShouldNotReachHere();
430 }
431 #endif
432
433 // tracing
434 if (TraceExceptions) {
435 ResourceMark rm(thread);
436 Symbol* message = java_lang_Throwable::detail_message(h_exception());
437 ttyLocker ttyl; // Lock after getting the detail message
438 if (message != NULL) {
439 tty->print_cr("Exception <%s: %s> (" INTPTR_FORMAT ")",
440 h_exception->print_value_string(), message->as_C_string(),
441 (address)h_exception());
442 } else {
443 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")",
444 h_exception->print_value_string(),
445 (address)h_exception());
446 }
447 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
448 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
449 }
450 // Don't go paging in something which won't be used.
451 // else if (extable->length() == 0) {
452 // // disabled for now - interpreter is not using shortcut yet
453 // // (shortcut is not to call runtime if we have no exception handlers)
454 // // warning("performance bug: should not call runtime if method has no exception handlers");
455 // }
456 // for AbortVMOnException flag
457 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
458
459 // exception handler lookup
460 KlassHandle h_klass(THREAD, h_exception->klass());
461 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
462 if (HAS_PENDING_EXCEPTION) {
463 // We threw an exception while trying to find the exception handler.
464 // Transfer the new exception to the exception handle which will
465 // be set into thread local storage, and do another lookup for an
466 // exception handler for this exception, this time starting at the
467 // BCI of the exception handler which caused the exception to be
468 // thrown (bug 4307310).
469 h_exception = Handle(THREAD, PENDING_EXCEPTION);
470 CLEAR_PENDING_EXCEPTION;
471 if (handler_bci >= 0) {
472 current_bci = handler_bci;
473 should_repeat = true;
474 }
475 }
476 } while (should_repeat == true);
477
478 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
479 // time throw or a stack unwinding throw and accordingly notify the debugger
480 if (JvmtiExport::can_post_on_exceptions()) {
481 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
482 }
483
484 #ifdef CC_INTERP
485 address continuation = (address)(intptr_t) handler_bci;
486 #else
487 address continuation = NULL;
488 #endif
489 address handler_pc = NULL;
490 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
491 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
492 // handler in this method, or (b) after a stack overflow there is not yet
493 // enough stack space available to reprotect the stack.
494 #ifndef CC_INTERP
495 continuation = Interpreter::remove_activation_entry();
496 #endif
497 // Count this for compilation purposes
498 h_method->interpreter_throwout_increment(THREAD);
499 } else {
500 // handler in this method => change bci/bcp to handler bci/bcp and continue there
501 handler_pc = h_method->code_base() + handler_bci;
502 #ifndef CC_INTERP
503 set_bcp_and_mdp(handler_pc, thread);
504 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
505 #endif
506 }
507 // notify debugger of an exception catch
508 // (this is good for exceptions caught in native methods as well)
509 if (JvmtiExport::can_post_on_exceptions()) {
510 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
511 }
512
513 thread->set_vm_result(h_exception());
514 return continuation;
515 IRT_END
516
517
518 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
519 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
520 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
521 IRT_END
522
523
524 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
525 THROW(vmSymbols::java_lang_AbstractMethodError());
526 IRT_END
527
528
529 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
530 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
531 IRT_END
532
533
534 //------------------------------------------------------------------------------------------------------------------------
535 // Fields
536 //
537
538 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
539 // resolve field
540 fieldDescriptor info;
541 constantPoolHandle pool(thread, method(thread)->constants());
542 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic);
543 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
544
545 {
546 JvmtiHideSingleStepping jhss(thread);
547 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
548 bytecode, CHECK);
549 } // end JvmtiHideSingleStepping
550
551 // check if link resolution caused cpCache to be updated
552 if (already_resolved(thread)) return;
553
554 // compute auxiliary field attributes
555 TosState state = as_TosState(info.field_type());
556
557 // We need to delay resolving put instructions on final fields
558 // until we actually invoke one. This is required so we throw
559 // exceptions at the correct place. If we do not resolve completely
560 // in the current pass, leaving the put_code set to zero will
561 // cause the next put instruction to reresolve.
562 Bytecodes::Code put_code = (Bytecodes::Code)0;
563
564 // We also need to delay resolving getstatic instructions until the
565 // class is intitialized. This is required so that access to the static
566 // field will call the initialization function every time until the class
567 // is completely initialized ala. in 2.17.5 in JVM Specification.
568 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
569 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
570 !klass->is_initialized());
571 Bytecodes::Code get_code = (Bytecodes::Code)0;
572
573 if (!uninitialized_static) {
574 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
575 if (is_put || !info.access_flags().is_final()) {
576 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
577 }
578 }
579
580 cache_entry(thread)->set_field(
581 get_code,
582 put_code,
583 info.field_holder(),
584 info.index(),
585 info.offset(),
586 state,
587 info.access_flags().is_final(),
588 info.access_flags().is_volatile(),
589 pool->pool_holder()
590 );
591 IRT_END
592
593
594 //------------------------------------------------------------------------------------------------------------------------
595 // Synchronization
596 //
597 // The interpreter's synchronization code is factored out so that it can
598 // be shared by method invocation and synchronized blocks.
599 //%note synchronization_3
600
601 //%note monitor_1
602 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
603 #ifdef ASSERT
604 thread->last_frame().interpreter_frame_verify_monitor(elem);
605 #endif
606 if (PrintBiasedLockingStatistics) {
607 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
608 }
609 Handle h_obj(thread, elem->obj());
610 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
611 "must be NULL or an object");
612 if (UseBiasedLocking) {
613 // Retry fast entry if bias is revoked to avoid unnecessary inflation
614 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
615 } else {
616 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
617 }
618 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
619 "must be NULL or an object");
620 #ifdef ASSERT
621 thread->last_frame().interpreter_frame_verify_monitor(elem);
622 #endif
623 IRT_END
624
625
626 //%note monitor_1
627 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
628 #ifdef ASSERT
629 thread->last_frame().interpreter_frame_verify_monitor(elem);
630 #endif
631 Handle h_obj(thread, elem->obj());
632 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
633 "must be NULL or an object");
634 if (elem == NULL || h_obj()->is_unlocked()) {
635 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
636 }
637 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
638 // Free entry. This must be done here, since a pending exception might be installed on
639 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
640 elem->set_obj(NULL);
641 #ifdef ASSERT
642 thread->last_frame().interpreter_frame_verify_monitor(elem);
643 #endif
644 IRT_END
645
646
647 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
648 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
649 IRT_END
650
651
652 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
653 // Returns an illegal exception to install into the current thread. The
654 // pending_exception flag is cleared so normal exception handling does not
655 // trigger. Any current installed exception will be overwritten. This
656 // method will be called during an exception unwind.
657
658 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
659 Handle exception(thread, thread->vm_result());
660 assert(exception() != NULL, "vm result should be set");
661 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
662 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
663 exception = get_preinitialized_exception(
664 SystemDictionary::IllegalMonitorStateException_klass(),
665 CATCH);
666 }
667 thread->set_vm_result(exception());
668 IRT_END
669
670
671 //------------------------------------------------------------------------------------------------------------------------
672 // Invokes
673
674 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
675 return method->orig_bytecode_at(method->bci_from(bcp));
676 IRT_END
677
678 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
679 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
680 IRT_END
681
682 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
683 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
684 IRT_END
685
686 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) {
687 // extract receiver from the outgoing argument list if necessary
688 Handle receiver(thread, NULL);
689 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
690 ResourceMark rm(thread);
691 methodHandle m (thread, method(thread));
692 Bytecode_invoke call(m, bci(thread));
693 Symbol* signature = call.signature();
694 receiver = Handle(thread,
695 thread->last_frame().interpreter_callee_receiver(signature));
696 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
697 "sanity check");
698 assert(receiver.is_null() ||
699 !Universe::heap()->is_in_reserved(receiver->klass()),
700 "sanity check");
701 }
702
703 // resolve method
704 CallInfo info;
705 constantPoolHandle pool(thread, method(thread)->constants());
706
707 {
708 JvmtiHideSingleStepping jhss(thread);
709 LinkResolver::resolve_invoke(info, receiver, pool,
710 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
711 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
712 int retry_count = 0;
713 while (info.resolved_method()->is_old()) {
714 // It is very unlikely that method is redefined more than 100 times
715 // in the middle of resolve. If it is looping here more than 100 times
716 // means then there could be a bug here.
717 guarantee((retry_count++ < 100),
718 "Could not resolve to latest version of redefined method");
719 // method is redefined in the middle of resolve so re-try.
720 LinkResolver::resolve_invoke(info, receiver, pool,
721 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
722 }
723 }
724 } // end JvmtiHideSingleStepping
725
726 // check if link resolution caused cpCache to be updated
727 if (already_resolved(thread)) return;
728
729 if (bytecode == Bytecodes::_invokeinterface) {
730 if (TraceItables && Verbose) {
731 ResourceMark rm(thread);
732 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
733 }
734 }
735 #ifdef ASSERT
736 if (bytecode == Bytecodes::_invokeinterface) {
737 if (info.resolved_method()->method_holder() ==
738 SystemDictionary::Object_klass()) {
739 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
740 // (see also CallInfo::set_interface for details)
741 assert(info.call_kind() == CallInfo::vtable_call ||
742 info.call_kind() == CallInfo::direct_call, "");
743 methodHandle rm = info.resolved_method();
744 assert(rm->is_final() || info.has_vtable_index(),
745 "should have been set already");
746 } else if (!info.resolved_method()->has_itable_index()) {
747 // Resolved something like CharSequence.toString. Use vtable not itable.
748 assert(info.call_kind() != CallInfo::itable_call, "");
749 } else {
750 // Setup itable entry
751 assert(info.call_kind() == CallInfo::itable_call, "");
752 int index = info.resolved_method()->itable_index();
753 assert(info.itable_index() == index, "");
754 }
755 } else {
756 assert(info.call_kind() == CallInfo::direct_call ||
757 info.call_kind() == CallInfo::vtable_call, "");
758 }
759 #endif
760 switch (info.call_kind()) {
761 case CallInfo::direct_call:
762 cache_entry(thread)->set_direct_call(
763 bytecode,
764 info.resolved_method());
765 break;
766 case CallInfo::vtable_call:
767 cache_entry(thread)->set_vtable_call(
768 bytecode,
769 info.resolved_method(),
770 info.vtable_index());
771 break;
772 case CallInfo::itable_call:
773 cache_entry(thread)->set_itable_call(
774 bytecode,
775 info.resolved_method(),
776 info.itable_index());
777 break;
778 default: ShouldNotReachHere();
779 }
780 }
781 IRT_END
782
783
784 // First time execution: Resolve symbols, create a permanent MethodType object.
785 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) {
786 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
787
788 // resolve method
789 CallInfo info;
790 constantPoolHandle pool(thread, method(thread)->constants());
791
792 {
793 JvmtiHideSingleStepping jhss(thread);
794 LinkResolver::resolve_invoke(info, Handle(), pool,
795 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
796 } // end JvmtiHideSingleStepping
797
798 cache_entry(thread)->set_method_handle(pool, info);
799 }
800 IRT_END
801
802
803 // First time execution: Resolve symbols, create a permanent CallSite object.
804 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) {
805 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
806
807 //TO DO: consider passing BCI to Java.
808 // int caller_bci = method(thread)->bci_from(bcp(thread));
809
810 // resolve method
811 CallInfo info;
812 constantPoolHandle pool(thread, method(thread)->constants());
813 int index = get_index_u4(thread, bytecode);
814 {
815 JvmtiHideSingleStepping jhss(thread);
816 LinkResolver::resolve_invoke(info, Handle(), pool,
817 index, bytecode, CHECK);
818 } // end JvmtiHideSingleStepping
819
820 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
821 cp_cache_entry->set_dynamic_call(pool, info);
822 }
823 IRT_END
824
825
826 //------------------------------------------------------------------------------------------------------------------------
827 // Miscellaneous
828
829
830 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
831 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
832 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
833 if (branch_bcp != NULL && nm != NULL) {
834 // This was a successful request for an OSR nmethod. Because
835 // frequency_counter_overflow_inner ends with a safepoint check,
836 // nm could have been unloaded so look it up again. It's unsafe
837 // to examine nm directly since it might have been freed and used
838 // for something else.
839 frame fr = thread->last_frame();
840 Method* method = fr.interpreter_frame_method();
841 int bci = method->bci_from(fr.interpreter_frame_bcp());
842 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
843 }
844 #ifndef PRODUCT
845 if (TraceOnStackReplacement) {
846 if (nm != NULL) {
847 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
848 nm->print();
849 }
850 }
851 #endif
852 return nm;
853 }
854
855 IRT_ENTRY(nmethod*,
856 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
857 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
858 // flag, in case this method triggers classloading which will call into Java.
859 UnlockFlagSaver fs(thread);
860
861 frame fr = thread->last_frame();
862 assert(fr.is_interpreted_frame(), "must come from interpreter");
863 methodHandle method(thread, fr.interpreter_frame_method());
864 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
865 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
866
867 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
868 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
869 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
870
871 if (osr_nm != NULL) {
872 // We may need to do on-stack replacement which requires that no
873 // monitors in the activation are biased because their
874 // BasicObjectLocks will need to migrate during OSR. Force
875 // unbiasing of all monitors in the activation now (even though
876 // the OSR nmethod might be invalidated) because we don't have a
877 // safepoint opportunity later once the migration begins.
878 if (UseBiasedLocking) {
879 ResourceMark rm;
880 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
881 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
882 kptr < fr.interpreter_frame_monitor_begin();
883 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
884 if( kptr->obj() != NULL ) {
885 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
886 }
887 }
888 BiasedLocking::revoke(objects_to_revoke);
889 }
890 }
891 return osr_nm;
892 IRT_END
893
894 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
895 assert(ProfileInterpreter, "must be profiling interpreter");
896 int bci = method->bci_from(cur_bcp);
897 MethodData* mdo = method->method_data();
898 if (mdo == NULL) return 0;
899 return mdo->bci_to_di(bci);
900 IRT_END
901
902 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
903 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
904 // flag, in case this method triggers classloading which will call into Java.
905 UnlockFlagSaver fs(thread);
906
907 assert(ProfileInterpreter, "must be profiling interpreter");
908 frame fr = thread->last_frame();
909 assert(fr.is_interpreted_frame(), "must come from interpreter");
910 methodHandle method(thread, fr.interpreter_frame_method());
911 Method::build_interpreter_method_data(method, THREAD);
912 if (HAS_PENDING_EXCEPTION) {
913 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
914 CLEAR_PENDING_EXCEPTION;
915 // and fall through...
916 }
917 IRT_END
918
919
920 #ifdef ASSERT
921 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
922 assert(ProfileInterpreter, "must be profiling interpreter");
923
924 MethodData* mdo = method->method_data();
925 assert(mdo != NULL, "must not be null");
926
927 int bci = method->bci_from(bcp);
928
929 address mdp2 = mdo->bci_to_dp(bci);
930 if (mdp != mdp2) {
931 ResourceMark rm;
932 ResetNoHandleMark rnm; // In a LEAF entry.
933 HandleMark hm;
934 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
935 int current_di = mdo->dp_to_di(mdp);
936 int expected_di = mdo->dp_to_di(mdp2);
937 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
938 int expected_approx_bci = mdo->data_at(expected_di)->bci();
939 int approx_bci = -1;
940 if (current_di >= 0) {
941 approx_bci = mdo->data_at(current_di)->bci();
942 }
943 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
944 mdo->print_on(tty);
945 method->print_codes();
946 }
947 assert(mdp == mdp2, "wrong mdp");
948 IRT_END
949 #endif // ASSERT
950
951 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
952 assert(ProfileInterpreter, "must be profiling interpreter");
953 ResourceMark rm(thread);
954 HandleMark hm(thread);
955 frame fr = thread->last_frame();
956 assert(fr.is_interpreted_frame(), "must come from interpreter");
957 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
958
959 // Grab a lock to ensure atomic access to setting the return bci and
960 // the displacement. This can block and GC, invalidating all naked oops.
961 MutexLocker ml(RetData_lock);
962
963 // ProfileData is essentially a wrapper around a derived oop, so we
964 // need to take the lock before making any ProfileData structures.
965 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
966 RetData* rdata = data->as_RetData();
967 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
968 fr.interpreter_frame_set_mdp(new_mdp);
969 IRT_END
970
971 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
972 MethodCounters* mcs = Method::build_method_counters(m, thread);
973 if (HAS_PENDING_EXCEPTION) {
974 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
975 CLEAR_PENDING_EXCEPTION;
976 }
977 return mcs;
978 IRT_END
979
980
981 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
982 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
983 // stack traversal automatically takes care of preserving arguments for invoke, so
984 // this is no longer needed.
985
986 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
987 // if this is called during a safepoint
988
989 if (JvmtiExport::should_post_single_step()) {
990 // We are called during regular safepoints and when the VM is
991 // single stepping. If any thread is marked for single stepping,
992 // then we may have JVMTI work to do.
993 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
994 }
995 IRT_END
996
997 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
998 ConstantPoolCacheEntry *cp_entry))
999
1000 // check the access_flags for the field in the klass
1001
1002 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1003 int index = cp_entry->field_index();
1004 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1005
1006 bool is_static = (obj == NULL);
1007 HandleMark hm(thread);
1008
1009 Handle h_obj;
1010 if (!is_static) {
1011 // non-static field accessors have an object, but we need a handle
1012 h_obj = Handle(thread, obj);
1013 }
1014 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
1015 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
1016 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
1017 IRT_END
1018
1019 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1020 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1021
1022 Klass* k = (Klass*)cp_entry->f1_as_klass();
1023
1024 // check the access_flags for the field in the klass
1025 InstanceKlass* ik = InstanceKlass::cast(k);
1026 int index = cp_entry->field_index();
1027 // bail out if field modifications are not watched
1028 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1029
1030 char sig_type = '\0';
1031
1032 switch(cp_entry->flag_state()) {
1033 case btos: sig_type = 'Z'; break;
1034 case ctos: sig_type = 'C'; break;
1035 case stos: sig_type = 'S'; break;
1036 case itos: sig_type = 'I'; break;
1037 case ftos: sig_type = 'F'; break;
1038 case atos: sig_type = 'L'; break;
1039 case ltos: sig_type = 'J'; break;
1040 case dtos: sig_type = 'D'; break;
1041 default: ShouldNotReachHere(); return;
1042 }
1043 bool is_static = (obj == NULL);
1044
1045 HandleMark hm(thread);
1046 instanceKlassHandle h_klass(thread, k);
1047 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1048 jvalue fvalue;
1049 #ifdef _LP64
1050 fvalue = *value;
1051 #else
1052 // Long/double values are stored unaligned and also noncontiguously with
1053 // tagged stacks. We can't just do a simple assignment even in the non-
1054 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1055 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1056 // We assume that the two halves of longs/doubles are stored in interpreter
1057 // stack slots in platform-endian order.
1058 jlong_accessor u;
1059 jint* newval = (jint*)value;
1060 u.words[0] = newval[0];
1061 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1062 fvalue.j = u.long_value;
1063 #endif // _LP64
1064
1065 Handle h_obj;
1066 if (!is_static) {
1067 // non-static field accessors have an object, but we need a handle
1068 h_obj = Handle(thread, obj);
1069 }
1070
1071 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1072 fid, sig_type, &fvalue);
1073 IRT_END
1074
1075 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1076 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1077 IRT_END
1078
1079
1080 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1081 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1082 IRT_END
1083
1084 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1085 {
1086 return (Interpreter::contains(pc) ? 1 : 0);
1087 }
1088 IRT_END
1089
1090
1091 // Implementation of SignatureHandlerLibrary
1092
1093 address SignatureHandlerLibrary::set_handler_blob() {
1094 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1095 if (handler_blob == NULL) {
1096 return NULL;
1097 }
1098 address handler = handler_blob->code_begin();
1099 _handler_blob = handler_blob;
1100 _handler = handler;
1101 return handler;
1102 }
1103
1104 void SignatureHandlerLibrary::initialize() {
1105 if (_fingerprints != NULL) {
1106 return;
1107 }
1108 if (set_handler_blob() == NULL) {
1109 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1110 }
1111
1112 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1113 SignatureHandlerLibrary::buffer_size);
1114 _buffer = bb->code_begin();
1115
1116 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1117 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1118 }
1119
1120 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1121 address handler = _handler;
1122 int insts_size = buffer->pure_insts_size();
1123 if (handler + insts_size > _handler_blob->code_end()) {
1124 // get a new handler blob
1125 handler = set_handler_blob();
1126 }
1127 if (handler != NULL) {
1128 memcpy(handler, buffer->insts_begin(), insts_size);
1129 pd_set_handler(handler);
1130 ICache::invalidate_range(handler, insts_size);
1131 _handler = handler + insts_size;
1132 }
1133 return handler;
1134 }
1135
1136 void SignatureHandlerLibrary::add(methodHandle method) {
1137 if (method->signature_handler() == NULL) {
1138 // use slow signature handler if we can't do better
1139 int handler_index = -1;
1140 // check if we can use customized (fast) signature handler
1141 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1142 // use customized signature handler
1143 MutexLocker mu(SignatureHandlerLibrary_lock);
1144 // make sure data structure is initialized
1145 initialize();
1146 // lookup method signature's fingerprint
1147 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1148 handler_index = _fingerprints->find(fingerprint);
1149 // create handler if necessary
1150 if (handler_index < 0) {
1151 ResourceMark rm;
1152 ptrdiff_t align_offset = (address)
1153 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1154 CodeBuffer buffer((address)(_buffer + align_offset),
1155 SignatureHandlerLibrary::buffer_size - align_offset);
1156 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1157 // copy into code heap
1158 address handler = set_handler(&buffer);
1159 if (handler == NULL) {
1160 // use slow signature handler
1161 } else {
1162 // debugging suppport
1163 if (PrintSignatureHandlers) {
1164 tty->cr();
1165 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1166 _handlers->length(),
1167 (method->is_static() ? "static" : "receiver"),
1168 method->name_and_sig_as_C_string(),
1169 fingerprint,
1170 buffer.insts_size());
1171 Disassembler::decode(handler, handler + buffer.insts_size());
1172 #ifndef PRODUCT
1173 tty->print_cr(" --- associated result handler ---");
1174 address rh_begin = Interpreter::result_handler(method()->result_type());
1175 address rh_end = rh_begin;
1176 while (*(int*)rh_end != 0) {
1177 rh_end += sizeof(int);
1178 }
1179 Disassembler::decode(rh_begin, rh_end);
1180 #endif
1181 }
1182 // add handler to library
1183 _fingerprints->append(fingerprint);
1184 _handlers->append(handler);
1185 // set handler index
1186 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1187 handler_index = _fingerprints->length() - 1;
1188 }
1189 }
1190 // Set handler under SignatureHandlerLibrary_lock
1191 if (handler_index < 0) {
1192 // use generic signature handler
1193 method->set_signature_handler(Interpreter::slow_signature_handler());
1194 } else {
1195 // set handler
1196 method->set_signature_handler(_handlers->at(handler_index));
1197 }
1198 } else {
1199 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1200 // use generic signature handler
1201 method->set_signature_handler(Interpreter::slow_signature_handler());
1202 }
1203 }
1204 #ifdef ASSERT
1205 int handler_index = -1;
1206 int fingerprint_index = -2;
1207 {
1208 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1209 // in any way if accessed from multiple threads. To avoid races with another
1210 // thread which may change the arrays in the above, mutex protected block, we
1211 // have to protect this read access here with the same mutex as well!
1212 MutexLocker mu(SignatureHandlerLibrary_lock);
1213 if (_handlers != NULL) {
1214 handler_index = _handlers->find(method->signature_handler());
1215 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
1216 }
1217 }
1218 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1219 handler_index == fingerprint_index, "sanity check");
1220 #endif // ASSERT
1221 }
1222
1223
1224 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1225 address SignatureHandlerLibrary::_handler = NULL;
1226 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1227 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1228 address SignatureHandlerLibrary::_buffer = NULL;
1229
1230
1231 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1232 methodHandle m(thread, method);
1233 assert(m->is_native(), "sanity check");
1234 // lookup native function entry point if it doesn't exist
1235 bool in_base_library;
1236 if (!m->has_native_function()) {
1237 NativeLookup::lookup(m, in_base_library, CHECK);
1238 }
1239 // make sure signature handler is installed
1240 SignatureHandlerLibrary::add(m);
1241 // The interpreter entry point checks the signature handler first,
1242 // before trying to fetch the native entry point and klass mirror.
1243 // We must set the signature handler last, so that multiple processors
1244 // preparing the same method will be sure to see non-null entry & mirror.
1245 IRT_END
1246
1247 #if defined(IA32) || defined(AMD64) || defined(ARM)
1248 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1249 if (src_address == dest_address) {
1250 return;
1251 }
1252 ResetNoHandleMark rnm; // In a LEAF entry.
1253 HandleMark hm;
1254 ResourceMark rm;
1255 frame fr = thread->last_frame();
1256 assert(fr.is_interpreted_frame(), "");
1257 jint bci = fr.interpreter_frame_bci();
1258 methodHandle mh(thread, fr.interpreter_frame_method());
1259 Bytecode_invoke invoke(mh, bci);
1260 ArgumentSizeComputer asc(invoke.signature());
1261 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1262 Copy::conjoint_jbytes(src_address, dest_address,
1263 size_of_arguments * Interpreter::stackElementSize);
1264 IRT_END
1265 #endif
1266
1267 #if INCLUDE_JVMTI
1268 // This is a support of the JVMTI PopFrame interface.
1269 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1270 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1271 // The member_name argument is a saved reference (in local#0) to the member_name.
1272 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1273 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1274 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1275 Method* method, address bcp))
1276 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1277 if (code != Bytecodes::_invokestatic) {
1278 return;
1279 }
1280 ConstantPool* cpool = method->constants();
1281 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1282 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1283 Symbol* mname = cpool->name_ref_at(cp_index);
1284
1285 if (MethodHandles::has_member_arg(cname, mname)) {
1286 oop member_name_oop = (oop) member_name;
1287 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1288 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1289 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1290 }
1291 thread->set_vm_result(member_name_oop);
1292 }
1293 IRT_END
1294 #endif // INCLUDE_JVMTI