Tue, 24 Jul 2012 10:51:00 -0700
7023639: JSR 292 method handle invocation needs a fast path for compiled code
6984705: JSR 292 method handle creation should not go through JNI
Summary: remove assembly code for JDK 7 chained method handles
Reviewed-by: jrose, twisti, kvn, mhaupt
Contributed-by: John Rose <john.r.rose@oracle.com>, Christian Thalinger <christian.thalinger@oracle.com>, Michael Haupt <michael.haupt@oracle.com>
1 /*
2 * Copyright (c) 1997, 2012, 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 */
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "gc_interface/collectedHeap.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "interpreter/interpreterRuntime.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "interpreter/templateTable.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/constantPoolOop.hpp"
37 #include "oops/cpCacheOop.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/methodDataOop.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/biasedLocking.hpp"
46 #include "runtime/compilationPolicy.hpp"
47 #include "runtime/deoptimization.hpp"
48 #include "runtime/fieldDescriptor.hpp"
49 #include "runtime/handles.inline.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/jfieldIDWorkaround.hpp"
53 #include "runtime/osThread.hpp"
54 #include "runtime/sharedRuntime.hpp"
55 #include "runtime/stubRoutines.hpp"
56 #include "runtime/synchronizer.hpp"
57 #include "runtime/threadCritical.hpp"
58 #include "utilities/events.hpp"
59 #ifdef TARGET_ARCH_x86
60 # include "vm_version_x86.hpp"
61 #endif
62 #ifdef TARGET_ARCH_sparc
63 # include "vm_version_sparc.hpp"
64 #endif
65 #ifdef TARGET_ARCH_zero
66 # include "vm_version_zero.hpp"
67 #endif
68 #ifdef TARGET_ARCH_arm
69 # include "vm_version_arm.hpp"
70 #endif
71 #ifdef TARGET_ARCH_ppc
72 # include "vm_version_ppc.hpp"
73 #endif
74 #ifdef COMPILER2
75 #include "opto/runtime.hpp"
76 #endif
78 class UnlockFlagSaver {
79 private:
80 JavaThread* _thread;
81 bool _do_not_unlock;
82 public:
83 UnlockFlagSaver(JavaThread* t) {
84 _thread = t;
85 _do_not_unlock = t->do_not_unlock_if_synchronized();
86 t->set_do_not_unlock_if_synchronized(false);
87 }
88 ~UnlockFlagSaver() {
89 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
90 }
91 };
93 //------------------------------------------------------------------------------------------------------------------------
94 // State accessors
96 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
97 last_frame(thread).interpreter_frame_set_bcp(bcp);
98 if (ProfileInterpreter) {
99 // ProfileTraps uses MDOs independently of ProfileInterpreter.
100 // That is why we must check both ProfileInterpreter and mdo != NULL.
101 methodDataOop mdo = last_frame(thread).interpreter_frame_method()->method_data();
102 if (mdo != NULL) {
103 NEEDS_CLEANUP;
104 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
105 }
106 }
107 }
109 //------------------------------------------------------------------------------------------------------------------------
110 // Constants
113 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
114 // access constant pool
115 constantPoolOop pool = method(thread)->constants();
116 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
117 constantTag tag = pool->tag_at(index);
119 if (tag.is_unresolved_klass() || tag.is_klass()) {
120 klassOop klass = pool->klass_at(index, CHECK);
121 oop java_class = klass->java_mirror();
122 thread->set_vm_result(java_class);
123 } else {
124 #ifdef ASSERT
125 // If we entered this runtime routine, we believed the tag contained
126 // an unresolved string, an unresolved class or a resolved class.
127 // However, another thread could have resolved the unresolved string
128 // or class by the time we go there.
129 assert(tag.is_unresolved_string()|| tag.is_string(), "expected string");
130 #endif
131 oop s_oop = pool->string_at(index, CHECK);
132 thread->set_vm_result(s_oop);
133 }
134 IRT_END
136 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
137 assert(bytecode == Bytecodes::_fast_aldc ||
138 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
139 ResourceMark rm(thread);
140 methodHandle m (thread, method(thread));
141 Bytecode_loadconstant ldc(m, bci(thread));
142 oop result = ldc.resolve_constant(CHECK);
143 #ifdef ASSERT
144 {
145 // The bytecode wrappers aren't GC-safe so construct a new one
146 Bytecode_loadconstant ldc2(m, bci(thread));
147 ConstantPoolCacheEntry* cpce = m->constants()->cache()->entry_at(ldc2.cache_index());
148 assert(result == cpce->f1_as_instance(), "expected result for assembly code");
149 }
150 #endif
151 }
152 IRT_END
155 //------------------------------------------------------------------------------------------------------------------------
156 // Allocation
158 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index))
159 klassOop k_oop = pool->klass_at(index, CHECK);
160 instanceKlassHandle klass (THREAD, k_oop);
162 // Make sure we are not instantiating an abstract klass
163 klass->check_valid_for_instantiation(true, CHECK);
165 // Make sure klass is initialized
166 klass->initialize(CHECK);
168 // At this point the class may not be fully initialized
169 // because of recursive initialization. If it is fully
170 // initialized & has_finalized is not set, we rewrite
171 // it into its fast version (Note: no locking is needed
172 // here since this is an atomic byte write and can be
173 // done more than once).
174 //
175 // Note: In case of classes with has_finalized we don't
176 // rewrite since that saves us an extra check in
177 // the fast version which then would call the
178 // slow version anyway (and do a call back into
179 // Java).
180 // If we have a breakpoint, then we don't rewrite
181 // because the _breakpoint bytecode would be lost.
182 oop obj = klass->allocate_instance(CHECK);
183 thread->set_vm_result(obj);
184 IRT_END
187 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
188 oop obj = oopFactory::new_typeArray(type, size, CHECK);
189 thread->set_vm_result(obj);
190 IRT_END
193 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size))
194 // Note: no oopHandle for pool & klass needed since they are not used
195 // anymore after new_objArray() and no GC can happen before.
196 // (This may have to change if this code changes!)
197 klassOop klass = pool->klass_at(index, CHECK);
198 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
199 thread->set_vm_result(obj);
200 IRT_END
203 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
204 // We may want to pass in more arguments - could make this slightly faster
205 constantPoolOop constants = method(thread)->constants();
206 int i = get_index_u2(thread, Bytecodes::_multianewarray);
207 klassOop klass = constants->klass_at(i, CHECK);
208 int nof_dims = number_of_dimensions(thread);
209 assert(oop(klass)->is_klass(), "not a class");
210 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
212 // We must create an array of jints to pass to multi_allocate.
213 ResourceMark rm(thread);
214 const int small_dims = 10;
215 jint dim_array[small_dims];
216 jint *dims = &dim_array[0];
217 if (nof_dims > small_dims) {
218 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
219 }
220 for (int index = 0; index < nof_dims; index++) {
221 // offset from first_size_address is addressed as local[index]
222 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
223 dims[index] = first_size_address[n];
224 }
225 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
226 thread->set_vm_result(obj);
227 IRT_END
230 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
231 assert(obj->is_oop(), "must be a valid oop");
232 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise");
233 instanceKlass::register_finalizer(instanceOop(obj), CHECK);
234 IRT_END
237 // Quicken instance-of and check-cast bytecodes
238 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
239 // Force resolving; quicken the bytecode
240 int which = get_index_u2(thread, Bytecodes::_checkcast);
241 constantPoolOop cpool = method(thread)->constants();
242 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
243 // program we might have seen an unquick'd bytecode in the interpreter but have another
244 // thread quicken the bytecode before we get here.
245 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
246 klassOop klass = cpool->klass_at(which, CHECK);
247 thread->set_vm_result(klass);
248 IRT_END
251 //------------------------------------------------------------------------------------------------------------------------
252 // Exceptions
254 // Assume the compiler is (or will be) interested in this event.
255 // If necessary, create an MDO to hold the information, and record it.
256 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
257 assert(ProfileTraps, "call me only if profiling");
258 methodHandle trap_method(thread, method(thread));
260 if (trap_method.not_null()) {
261 methodDataHandle trap_mdo(thread, trap_method->method_data());
262 if (trap_mdo.is_null()) {
263 methodOopDesc::build_interpreter_method_data(trap_method, THREAD);
264 if (HAS_PENDING_EXCEPTION) {
265 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
266 CLEAR_PENDING_EXCEPTION;
267 }
268 trap_mdo = methodDataHandle(thread, trap_method->method_data());
269 // and fall through...
270 }
271 if (trap_mdo.not_null()) {
272 // Update per-method count of trap events. The interpreter
273 // is updating the MDO to simulate the effect of compiler traps.
274 int trap_bci = trap_method->bci_from(bcp(thread));
275 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
276 }
277 }
278 }
280 static Handle get_preinitialized_exception(klassOop k, TRAPS) {
281 // get klass
282 instanceKlass* klass = instanceKlass::cast(k);
283 assert(klass->is_initialized(),
284 "this klass should have been initialized during VM initialization");
285 // create instance - do not call constructor since we may have no
286 // (java) stack space left (should assert constructor is empty)
287 Handle exception;
288 oop exception_oop = klass->allocate_instance(CHECK_(exception));
289 exception = Handle(THREAD, exception_oop);
290 if (StackTraceInThrowable) {
291 java_lang_Throwable::fill_in_stack_trace(exception);
292 }
293 return exception;
294 }
296 // Special handling for stack overflow: since we don't have any (java) stack
297 // space left we use the pre-allocated & pre-initialized StackOverflowError
298 // klass to create an stack overflow error instance. We do not call its
299 // constructor for the same reason (it is empty, anyway).
300 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
301 Handle exception = get_preinitialized_exception(
302 SystemDictionary::StackOverflowError_klass(),
303 CHECK);
304 THROW_HANDLE(exception);
305 IRT_END
308 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
309 // lookup exception klass
310 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
311 if (ProfileTraps) {
312 if (s == vmSymbols::java_lang_ArithmeticException()) {
313 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
314 } else if (s == vmSymbols::java_lang_NullPointerException()) {
315 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
316 }
317 }
318 // create exception
319 Handle exception = Exceptions::new_exception(thread, s, message);
320 thread->set_vm_result(exception());
321 IRT_END
324 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
325 ResourceMark rm(thread);
326 const char* klass_name = Klass::cast(obj->klass())->external_name();
327 // lookup exception klass
328 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
329 if (ProfileTraps) {
330 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
331 }
332 // create exception, with klass name as detail message
333 Handle exception = Exceptions::new_exception(thread, s, klass_name);
334 thread->set_vm_result(exception());
335 IRT_END
338 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
339 char message[jintAsStringSize];
340 // lookup exception klass
341 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
342 if (ProfileTraps) {
343 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
344 }
345 // create exception
346 sprintf(message, "%d", index);
347 THROW_MSG(s, message);
348 IRT_END
350 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
351 JavaThread* thread, oopDesc* obj))
353 ResourceMark rm(thread);
354 char* message = SharedRuntime::generate_class_cast_message(
355 thread, Klass::cast(obj->klass())->external_name());
357 if (ProfileTraps) {
358 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
359 }
361 // create exception
362 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
363 IRT_END
365 // exception_handler_for_exception(...) returns the continuation address,
366 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
367 // The exception oop is returned to make sure it is preserved over GC (it
368 // is only on the stack if the exception was thrown explicitly via athrow).
369 // During this operation, the expression stack contains the values for the
370 // bci where the exception happened. If the exception was propagated back
371 // from a call, the expression stack contains the values for the bci at the
372 // invoke w/o arguments (i.e., as if one were inside the call).
373 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
375 Handle h_exception(thread, exception);
376 methodHandle h_method (thread, method(thread));
377 constantPoolHandle h_constants(thread, h_method->constants());
378 bool should_repeat;
379 int handler_bci;
380 int current_bci = bci(thread);
382 // Need to do this check first since when _do_not_unlock_if_synchronized
383 // is set, we don't want to trigger any classloading which may make calls
384 // into java, or surprisingly find a matching exception handler for bci 0
385 // since at this moment the method hasn't been "officially" entered yet.
386 if (thread->do_not_unlock_if_synchronized()) {
387 ResourceMark rm;
388 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
389 thread->set_vm_result(exception);
390 #ifdef CC_INTERP
391 return (address) -1;
392 #else
393 return Interpreter::remove_activation_entry();
394 #endif
395 }
397 do {
398 should_repeat = false;
400 // assertions
401 #ifdef ASSERT
402 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
403 assert(h_exception->is_oop(), "just checking");
404 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
405 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
406 if (ExitVMOnVerifyError) vm_exit(-1);
407 ShouldNotReachHere();
408 }
409 #endif
411 // tracing
412 if (TraceExceptions) {
413 ttyLocker ttyl;
414 ResourceMark rm(thread);
415 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception());
416 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
417 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
418 }
419 // Don't go paging in something which won't be used.
420 // else if (h_extable->length() == 0) {
421 // // disabled for now - interpreter is not using shortcut yet
422 // // (shortcut is not to call runtime if we have no exception handlers)
423 // // warning("performance bug: should not call runtime if method has no exception handlers");
424 // }
425 // for AbortVMOnException flag
426 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
428 // exception handler lookup
429 KlassHandle h_klass(THREAD, h_exception->klass());
430 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD);
431 if (HAS_PENDING_EXCEPTION) {
432 // We threw an exception while trying to find the exception handler.
433 // Transfer the new exception to the exception handle which will
434 // be set into thread local storage, and do another lookup for an
435 // exception handler for this exception, this time starting at the
436 // BCI of the exception handler which caused the exception to be
437 // thrown (bug 4307310).
438 h_exception = Handle(THREAD, PENDING_EXCEPTION);
439 CLEAR_PENDING_EXCEPTION;
440 if (handler_bci >= 0) {
441 current_bci = handler_bci;
442 should_repeat = true;
443 }
444 }
445 } while (should_repeat == true);
447 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
448 // time throw or a stack unwinding throw and accordingly notify the debugger
449 if (JvmtiExport::can_post_on_exceptions()) {
450 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
451 }
453 #ifdef CC_INTERP
454 address continuation = (address)(intptr_t) handler_bci;
455 #else
456 address continuation = NULL;
457 #endif
458 address handler_pc = NULL;
459 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
460 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
461 // handler in this method, or (b) after a stack overflow there is not yet
462 // enough stack space available to reprotect the stack.
463 #ifndef CC_INTERP
464 continuation = Interpreter::remove_activation_entry();
465 #endif
466 // Count this for compilation purposes
467 h_method->interpreter_throwout_increment();
468 } else {
469 // handler in this method => change bci/bcp to handler bci/bcp and continue there
470 handler_pc = h_method->code_base() + handler_bci;
471 #ifndef CC_INTERP
472 set_bcp_and_mdp(handler_pc, thread);
473 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
474 #endif
475 }
476 // notify debugger of an exception catch
477 // (this is good for exceptions caught in native methods as well)
478 if (JvmtiExport::can_post_on_exceptions()) {
479 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
480 }
482 thread->set_vm_result(h_exception());
483 return continuation;
484 IRT_END
487 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
488 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
489 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
490 IRT_END
493 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
494 THROW(vmSymbols::java_lang_AbstractMethodError());
495 IRT_END
498 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
499 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
500 IRT_END
503 //------------------------------------------------------------------------------------------------------------------------
504 // Fields
505 //
507 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
508 // resolve field
509 FieldAccessInfo info;
510 constantPoolHandle pool(thread, method(thread)->constants());
511 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic);
512 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
514 {
515 JvmtiHideSingleStepping jhss(thread);
516 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode),
517 bytecode, false, CHECK);
518 } // end JvmtiHideSingleStepping
520 // check if link resolution caused cpCache to be updated
521 if (already_resolved(thread)) return;
523 // compute auxiliary field attributes
524 TosState state = as_TosState(info.field_type());
526 // We need to delay resolving put instructions on final fields
527 // until we actually invoke one. This is required so we throw
528 // exceptions at the correct place. If we do not resolve completely
529 // in the current pass, leaving the put_code set to zero will
530 // cause the next put instruction to reresolve.
531 Bytecodes::Code put_code = (Bytecodes::Code)0;
533 // We also need to delay resolving getstatic instructions until the
534 // class is intitialized. This is required so that access to the static
535 // field will call the initialization function every time until the class
536 // is completely initialized ala. in 2.17.5 in JVM Specification.
537 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop());
538 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
539 !klass->is_initialized());
540 Bytecodes::Code get_code = (Bytecodes::Code)0;
542 if (!uninitialized_static) {
543 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
544 if (is_put || !info.access_flags().is_final()) {
545 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
546 }
547 }
549 cache_entry(thread)->set_field(
550 get_code,
551 put_code,
552 info.klass(),
553 info.field_index(),
554 info.field_offset(),
555 state,
556 info.access_flags().is_final(),
557 info.access_flags().is_volatile()
558 );
559 IRT_END
562 //------------------------------------------------------------------------------------------------------------------------
563 // Synchronization
564 //
565 // The interpreter's synchronization code is factored out so that it can
566 // be shared by method invocation and synchronized blocks.
567 //%note synchronization_3
569 static void trace_locking(Handle& h_locking_obj, bool is_locking) {
570 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking);
571 }
574 //%note monitor_1
575 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
576 #ifdef ASSERT
577 thread->last_frame().interpreter_frame_verify_monitor(elem);
578 #endif
579 if (PrintBiasedLockingStatistics) {
580 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
581 }
582 Handle h_obj(thread, elem->obj());
583 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
584 "must be NULL or an object");
585 if (UseBiasedLocking) {
586 // Retry fast entry if bias is revoked to avoid unnecessary inflation
587 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
588 } else {
589 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
590 }
591 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
592 "must be NULL or an object");
593 #ifdef ASSERT
594 thread->last_frame().interpreter_frame_verify_monitor(elem);
595 #endif
596 IRT_END
599 //%note monitor_1
600 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
601 #ifdef ASSERT
602 thread->last_frame().interpreter_frame_verify_monitor(elem);
603 #endif
604 Handle h_obj(thread, elem->obj());
605 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
606 "must be NULL or an object");
607 if (elem == NULL || h_obj()->is_unlocked()) {
608 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
609 }
610 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
611 // Free entry. This must be done here, since a pending exception might be installed on
612 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
613 elem->set_obj(NULL);
614 #ifdef ASSERT
615 thread->last_frame().interpreter_frame_verify_monitor(elem);
616 #endif
617 IRT_END
620 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
621 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
622 IRT_END
625 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
626 // Returns an illegal exception to install into the current thread. The
627 // pending_exception flag is cleared so normal exception handling does not
628 // trigger. Any current installed exception will be overwritten. This
629 // method will be called during an exception unwind.
631 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
632 Handle exception(thread, thread->vm_result());
633 assert(exception() != NULL, "vm result should be set");
634 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
635 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
636 exception = get_preinitialized_exception(
637 SystemDictionary::IllegalMonitorStateException_klass(),
638 CATCH);
639 }
640 thread->set_vm_result(exception());
641 IRT_END
644 //------------------------------------------------------------------------------------------------------------------------
645 // Invokes
647 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp))
648 return method->orig_bytecode_at(method->bci_from(bcp));
649 IRT_END
651 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code))
652 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
653 IRT_END
655 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp))
656 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
657 IRT_END
659 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) {
660 // extract receiver from the outgoing argument list if necessary
661 Handle receiver(thread, NULL);
662 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
663 ResourceMark rm(thread);
664 methodHandle m (thread, method(thread));
665 Bytecode_invoke call(m, bci(thread));
666 Symbol* signature = call.signature();
667 receiver = Handle(thread,
668 thread->last_frame().interpreter_callee_receiver(signature));
669 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
670 "sanity check");
671 assert(receiver.is_null() ||
672 Universe::heap()->is_in_reserved(receiver->klass()),
673 "sanity check");
674 }
676 // resolve method
677 CallInfo info;
678 constantPoolHandle pool(thread, method(thread)->constants());
680 {
681 JvmtiHideSingleStepping jhss(thread);
682 LinkResolver::resolve_invoke(info, receiver, pool,
683 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
684 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
685 int retry_count = 0;
686 while (info.resolved_method()->is_old()) {
687 // It is very unlikely that method is redefined more than 100 times
688 // in the middle of resolve. If it is looping here more than 100 times
689 // means then there could be a bug here.
690 guarantee((retry_count++ < 100),
691 "Could not resolve to latest version of redefined method");
692 // method is redefined in the middle of resolve so re-try.
693 LinkResolver::resolve_invoke(info, receiver, pool,
694 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
695 }
696 }
697 } // end JvmtiHideSingleStepping
699 // check if link resolution caused cpCache to be updated
700 if (already_resolved(thread)) return;
702 if (bytecode == Bytecodes::_invokeinterface) {
704 if (TraceItables && Verbose) {
705 ResourceMark rm(thread);
706 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
707 }
708 if (info.resolved_method()->method_holder() ==
709 SystemDictionary::Object_klass()) {
710 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
711 // (see also cpCacheOop.cpp for details)
712 methodHandle rm = info.resolved_method();
713 assert(rm->is_final() || info.has_vtable_index(),
714 "should have been set already");
715 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index());
716 } else {
717 // Setup itable entry
718 int index = klassItable::compute_itable_index(info.resolved_method()());
719 cache_entry(thread)->set_interface_call(info.resolved_method(), index);
720 }
721 } else {
722 cache_entry(thread)->set_method(
723 bytecode,
724 info.resolved_method(),
725 info.vtable_index());
726 }
727 }
728 IRT_END
731 // First time execution: Resolve symbols, create a permanent MethodType object.
732 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) {
733 assert(EnableInvokeDynamic, "");
734 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
736 // resolve method
737 CallInfo info;
738 constantPoolHandle pool(thread, method(thread)->constants());
740 {
741 JvmtiHideSingleStepping jhss(thread);
742 LinkResolver::resolve_invoke(info, Handle(), pool,
743 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
744 } // end JvmtiHideSingleStepping
746 cache_entry(thread)->set_method_handle(
747 info.resolved_method(),
748 info.resolved_appendix());
749 }
750 IRT_END
753 // First time execution: Resolve symbols, create a permanent CallSite object.
754 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) {
755 assert(EnableInvokeDynamic, "");
756 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
758 //TO DO: consider passing BCI to Java.
759 // int caller_bci = method(thread)->bci_from(bcp(thread));
761 // resolve method
762 CallInfo info;
763 constantPoolHandle pool(thread, method(thread)->constants());
764 int index = get_index_u4(thread, bytecode);
766 {
767 JvmtiHideSingleStepping jhss(thread);
768 LinkResolver::resolve_invoke(info, Handle(), pool,
769 index, bytecode, CHECK);
770 } // end JvmtiHideSingleStepping
772 pool->cache()->secondary_entry_at(index)->set_dynamic_call(
773 info.resolved_method(),
774 info.resolved_appendix());
775 }
776 IRT_END
779 //------------------------------------------------------------------------------------------------------------------------
780 // Miscellaneous
783 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
784 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
785 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
786 if (branch_bcp != NULL && nm != NULL) {
787 // This was a successful request for an OSR nmethod. Because
788 // frequency_counter_overflow_inner ends with a safepoint check,
789 // nm could have been unloaded so look it up again. It's unsafe
790 // to examine nm directly since it might have been freed and used
791 // for something else.
792 frame fr = thread->last_frame();
793 methodOop method = fr.interpreter_frame_method();
794 int bci = method->bci_from(fr.interpreter_frame_bcp());
795 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
796 }
797 #ifndef PRODUCT
798 if (TraceOnStackReplacement) {
799 if (nm != NULL) {
800 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
801 nm->print();
802 }
803 }
804 #endif
805 return nm;
806 }
808 IRT_ENTRY(nmethod*,
809 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
810 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
811 // flag, in case this method triggers classloading which will call into Java.
812 UnlockFlagSaver fs(thread);
814 frame fr = thread->last_frame();
815 assert(fr.is_interpreted_frame(), "must come from interpreter");
816 methodHandle method(thread, fr.interpreter_frame_method());
817 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
818 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
820 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
821 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
822 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
824 if (osr_nm != NULL) {
825 // We may need to do on-stack replacement which requires that no
826 // monitors in the activation are biased because their
827 // BasicObjectLocks will need to migrate during OSR. Force
828 // unbiasing of all monitors in the activation now (even though
829 // the OSR nmethod might be invalidated) because we don't have a
830 // safepoint opportunity later once the migration begins.
831 if (UseBiasedLocking) {
832 ResourceMark rm;
833 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
834 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
835 kptr < fr.interpreter_frame_monitor_begin();
836 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
837 if( kptr->obj() != NULL ) {
838 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
839 }
840 }
841 BiasedLocking::revoke(objects_to_revoke);
842 }
843 }
844 return osr_nm;
845 IRT_END
847 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp))
848 assert(ProfileInterpreter, "must be profiling interpreter");
849 int bci = method->bci_from(cur_bcp);
850 methodDataOop mdo = method->method_data();
851 if (mdo == NULL) return 0;
852 return mdo->bci_to_di(bci);
853 IRT_END
855 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
856 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
857 // flag, in case this method triggers classloading which will call into Java.
858 UnlockFlagSaver fs(thread);
860 assert(ProfileInterpreter, "must be profiling interpreter");
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 methodOopDesc::build_interpreter_method_data(method, THREAD);
865 if (HAS_PENDING_EXCEPTION) {
866 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
867 CLEAR_PENDING_EXCEPTION;
868 // and fall through...
869 }
870 IRT_END
873 #ifdef ASSERT
874 IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp))
875 assert(ProfileInterpreter, "must be profiling interpreter");
877 methodDataOop mdo = method->method_data();
878 assert(mdo != NULL, "must not be null");
880 int bci = method->bci_from(bcp);
882 address mdp2 = mdo->bci_to_dp(bci);
883 if (mdp != mdp2) {
884 ResourceMark rm;
885 ResetNoHandleMark rnm; // In a LEAF entry.
886 HandleMark hm;
887 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
888 int current_di = mdo->dp_to_di(mdp);
889 int expected_di = mdo->dp_to_di(mdp2);
890 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
891 int expected_approx_bci = mdo->data_at(expected_di)->bci();
892 int approx_bci = -1;
893 if (current_di >= 0) {
894 approx_bci = mdo->data_at(current_di)->bci();
895 }
896 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
897 mdo->print_on(tty);
898 method->print_codes();
899 }
900 assert(mdp == mdp2, "wrong mdp");
901 IRT_END
902 #endif // ASSERT
904 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
905 assert(ProfileInterpreter, "must be profiling interpreter");
906 ResourceMark rm(thread);
907 HandleMark hm(thread);
908 frame fr = thread->last_frame();
909 assert(fr.is_interpreted_frame(), "must come from interpreter");
910 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data());
912 // Grab a lock to ensure atomic access to setting the return bci and
913 // the displacement. This can block and GC, invalidating all naked oops.
914 MutexLocker ml(RetData_lock);
916 // ProfileData is essentially a wrapper around a derived oop, so we
917 // need to take the lock before making any ProfileData structures.
918 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
919 RetData* rdata = data->as_RetData();
920 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
921 fr.interpreter_frame_set_mdp(new_mdp);
922 IRT_END
925 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
926 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
927 // stack traversal automatically takes care of preserving arguments for invoke, so
928 // this is no longer needed.
930 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
931 // if this is called during a safepoint
933 if (JvmtiExport::should_post_single_step()) {
934 // We are called during regular safepoints and when the VM is
935 // single stepping. If any thread is marked for single stepping,
936 // then we may have JVMTI work to do.
937 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
938 }
939 IRT_END
941 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
942 ConstantPoolCacheEntry *cp_entry))
944 // check the access_flags for the field in the klass
946 instanceKlass* ik = instanceKlass::cast(java_lang_Class::as_klassOop(cp_entry->f1_as_klass_mirror()));
947 int index = cp_entry->field_index();
948 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
950 switch(cp_entry->flag_state()) {
951 case btos: // fall through
952 case ctos: // fall through
953 case stos: // fall through
954 case itos: // fall through
955 case ftos: // fall through
956 case ltos: // fall through
957 case dtos: // fall through
958 case atos: break;
959 default: ShouldNotReachHere(); return;
960 }
961 bool is_static = (obj == NULL);
962 HandleMark hm(thread);
964 Handle h_obj;
965 if (!is_static) {
966 // non-static field accessors have an object, but we need a handle
967 h_obj = Handle(thread, obj);
968 }
969 instanceKlassHandle h_cp_entry_f1(thread, java_lang_Class::as_klassOop(cp_entry->f1_as_klass_mirror()));
970 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
971 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
972 IRT_END
974 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
975 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
977 klassOop k = java_lang_Class::as_klassOop(cp_entry->f1_as_klass_mirror());
979 // check the access_flags for the field in the klass
980 instanceKlass* ik = instanceKlass::cast(k);
981 int index = cp_entry->field_index();
982 // bail out if field modifications are not watched
983 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
985 char sig_type = '\0';
987 switch(cp_entry->flag_state()) {
988 case btos: sig_type = 'Z'; break;
989 case ctos: sig_type = 'C'; break;
990 case stos: sig_type = 'S'; break;
991 case itos: sig_type = 'I'; break;
992 case ftos: sig_type = 'F'; break;
993 case atos: sig_type = 'L'; break;
994 case ltos: sig_type = 'J'; break;
995 case dtos: sig_type = 'D'; break;
996 default: ShouldNotReachHere(); return;
997 }
998 bool is_static = (obj == NULL);
1000 HandleMark hm(thread);
1001 instanceKlassHandle h_klass(thread, k);
1002 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1003 jvalue fvalue;
1004 #ifdef _LP64
1005 fvalue = *value;
1006 #else
1007 // Long/double values are stored unaligned and also noncontiguously with
1008 // tagged stacks. We can't just do a simple assignment even in the non-
1009 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1010 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1011 // We assume that the two halves of longs/doubles are stored in interpreter
1012 // stack slots in platform-endian order.
1013 jlong_accessor u;
1014 jint* newval = (jint*)value;
1015 u.words[0] = newval[0];
1016 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1017 fvalue.j = u.long_value;
1018 #endif // _LP64
1020 Handle h_obj;
1021 if (!is_static) {
1022 // non-static field accessors have an object, but we need a handle
1023 h_obj = Handle(thread, obj);
1024 }
1026 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1027 fid, sig_type, &fvalue);
1028 IRT_END
1030 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1031 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1032 IRT_END
1035 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1036 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1037 IRT_END
1039 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1040 {
1041 return (Interpreter::contains(pc) ? 1 : 0);
1042 }
1043 IRT_END
1046 // Implementation of SignatureHandlerLibrary
1048 address SignatureHandlerLibrary::set_handler_blob() {
1049 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1050 if (handler_blob == NULL) {
1051 return NULL;
1052 }
1053 address handler = handler_blob->code_begin();
1054 _handler_blob = handler_blob;
1055 _handler = handler;
1056 return handler;
1057 }
1059 void SignatureHandlerLibrary::initialize() {
1060 if (_fingerprints != NULL) {
1061 return;
1062 }
1063 if (set_handler_blob() == NULL) {
1064 vm_exit_out_of_memory(blob_size, "native signature handlers");
1065 }
1067 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1068 SignatureHandlerLibrary::buffer_size);
1069 _buffer = bb->code_begin();
1071 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1072 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1073 }
1075 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1076 address handler = _handler;
1077 int insts_size = buffer->pure_insts_size();
1078 if (handler + insts_size > _handler_blob->code_end()) {
1079 // get a new handler blob
1080 handler = set_handler_blob();
1081 }
1082 if (handler != NULL) {
1083 memcpy(handler, buffer->insts_begin(), insts_size);
1084 pd_set_handler(handler);
1085 ICache::invalidate_range(handler, insts_size);
1086 _handler = handler + insts_size;
1087 }
1088 return handler;
1089 }
1091 void SignatureHandlerLibrary::add(methodHandle method) {
1092 if (method->signature_handler() == NULL) {
1093 // use slow signature handler if we can't do better
1094 int handler_index = -1;
1095 // check if we can use customized (fast) signature handler
1096 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1097 // use customized signature handler
1098 MutexLocker mu(SignatureHandlerLibrary_lock);
1099 // make sure data structure is initialized
1100 initialize();
1101 // lookup method signature's fingerprint
1102 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1103 handler_index = _fingerprints->find(fingerprint);
1104 // create handler if necessary
1105 if (handler_index < 0) {
1106 ResourceMark rm;
1107 ptrdiff_t align_offset = (address)
1108 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1109 CodeBuffer buffer((address)(_buffer + align_offset),
1110 SignatureHandlerLibrary::buffer_size - align_offset);
1111 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1112 // copy into code heap
1113 address handler = set_handler(&buffer);
1114 if (handler == NULL) {
1115 // use slow signature handler
1116 } else {
1117 // debugging suppport
1118 if (PrintSignatureHandlers) {
1119 tty->cr();
1120 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1121 _handlers->length(),
1122 (method->is_static() ? "static" : "receiver"),
1123 method->name_and_sig_as_C_string(),
1124 fingerprint,
1125 buffer.insts_size());
1126 Disassembler::decode(handler, handler + buffer.insts_size());
1127 #ifndef PRODUCT
1128 tty->print_cr(" --- associated result handler ---");
1129 address rh_begin = Interpreter::result_handler(method()->result_type());
1130 address rh_end = rh_begin;
1131 while (*(int*)rh_end != 0) {
1132 rh_end += sizeof(int);
1133 }
1134 Disassembler::decode(rh_begin, rh_end);
1135 #endif
1136 }
1137 // add handler to library
1138 _fingerprints->append(fingerprint);
1139 _handlers->append(handler);
1140 // set handler index
1141 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1142 handler_index = _fingerprints->length() - 1;
1143 }
1144 }
1145 // Set handler under SignatureHandlerLibrary_lock
1146 if (handler_index < 0) {
1147 // use generic signature handler
1148 method->set_signature_handler(Interpreter::slow_signature_handler());
1149 } else {
1150 // set handler
1151 method->set_signature_handler(_handlers->at(handler_index));
1152 }
1153 } else {
1154 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1155 // use generic signature handler
1156 method->set_signature_handler(Interpreter::slow_signature_handler());
1157 }
1158 }
1159 #ifdef ASSERT
1160 int handler_index = -1;
1161 int fingerprint_index = -2;
1162 {
1163 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1164 // in any way if accessed from multiple threads. To avoid races with another
1165 // thread which may change the arrays in the above, mutex protected block, we
1166 // have to protect this read access here with the same mutex as well!
1167 MutexLocker mu(SignatureHandlerLibrary_lock);
1168 if (_handlers != NULL) {
1169 handler_index = _handlers->find(method->signature_handler());
1170 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
1171 }
1172 }
1173 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1174 handler_index == fingerprint_index, "sanity check");
1175 #endif // ASSERT
1176 }
1179 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1180 address SignatureHandlerLibrary::_handler = NULL;
1181 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1182 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1183 address SignatureHandlerLibrary::_buffer = NULL;
1186 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method))
1187 methodHandle m(thread, method);
1188 assert(m->is_native(), "sanity check");
1189 // lookup native function entry point if it doesn't exist
1190 bool in_base_library;
1191 if (!m->has_native_function()) {
1192 NativeLookup::lookup(m, in_base_library, CHECK);
1193 }
1194 // make sure signature handler is installed
1195 SignatureHandlerLibrary::add(m);
1196 // The interpreter entry point checks the signature handler first,
1197 // before trying to fetch the native entry point and klass mirror.
1198 // We must set the signature handler last, so that multiple processors
1199 // preparing the same method will be sure to see non-null entry & mirror.
1200 IRT_END
1202 #if defined(IA32) || defined(AMD64) || defined(ARM)
1203 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1204 if (src_address == dest_address) {
1205 return;
1206 }
1207 ResetNoHandleMark rnm; // In a LEAF entry.
1208 HandleMark hm;
1209 ResourceMark rm;
1210 frame fr = thread->last_frame();
1211 assert(fr.is_interpreted_frame(), "");
1212 jint bci = fr.interpreter_frame_bci();
1213 methodHandle mh(thread, fr.interpreter_frame_method());
1214 Bytecode_invoke invoke(mh, bci);
1215 ArgumentSizeComputer asc(invoke.signature());
1216 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1217 Copy::conjoint_jbytes(src_address, dest_address,
1218 size_of_arguments * Interpreter::stackElementSize);
1219 IRT_END
1220 #endif