1 /*
2 * Copyright (c) 1997, 2025, 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 "classfile/javaClasses.inline.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/vmClasses.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compilationPolicy.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc/shared/barrierSetNMethod.hpp"
34 #include "gc/shared/collectedHeap.hpp"
35 #include "interpreter/bytecodeTracer.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/interpreterRuntime.hpp"
38 #include "interpreter/linkResolver.hpp"
39 #include "interpreter/templateTable.hpp"
40 #include "jvm_io.h"
41 #include "logging/log.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/constantPool.inline.hpp"
46 #include "oops/cpCache.inline.hpp"
47 #include "oops/instanceKlass.inline.hpp"
48 #include "oops/klass.inline.hpp"
49 #include "oops/methodData.hpp"
50 #include "oops/method.inline.hpp"
51 #include "oops/objArrayKlass.hpp"
52 #include "oops/objArrayOop.inline.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "oops/symbol.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/methodHandles.hpp"
57 #include "prims/nativeLookup.hpp"
58 #include "runtime/atomic.hpp"
59 #include "runtime/continuation.hpp"
60 #include "runtime/deoptimization.hpp"
61 #include "runtime/fieldDescriptor.inline.hpp"
62 #include "runtime/frame.inline.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/icache.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jfieldIDWorkaround.hpp"
69 #include "runtime/osThread.hpp"
70 #include "runtime/sharedRuntime.hpp"
71 #include "runtime/stackWatermarkSet.hpp"
72 #include "runtime/stubRoutines.hpp"
73 #include "runtime/synchronizer.inline.hpp"
74 #include "utilities/align.hpp"
75 #include "utilities/checkedCast.hpp"
76 #include "utilities/copy.hpp"
77 #include "utilities/events.hpp"
78
79 // Helper class to access current interpreter state
80 class LastFrameAccessor : public StackObj {
81 frame _last_frame;
82 public:
83 LastFrameAccessor(JavaThread* current) {
84 assert(current == Thread::current(), "sanity");
85 _last_frame = current->last_frame();
86 }
87 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
88 Method* method() const { return _last_frame.interpreter_frame_method(); }
89 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
90 int bci() const { return _last_frame.interpreter_frame_bci(); }
91 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
92
93 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
94 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
95
96 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
97 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
98
99 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
100 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
101 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
102 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
103 int number_of_dimensions() const { return bcp()[3]; }
104
105 oop callee_receiver(Symbol* signature) {
106 return _last_frame.interpreter_callee_receiver(signature);
107 }
108 BasicObjectLock* monitor_begin() const {
109 return _last_frame.interpreter_frame_monitor_begin();
110 }
111 BasicObjectLock* monitor_end() const {
112 return _last_frame.interpreter_frame_monitor_end();
113 }
114 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
115 return _last_frame.next_monitor_in_interpreter_frame(current);
116 }
117
118 frame& get_frame() { return _last_frame; }
119 };
120
121 //------------------------------------------------------------------------------------------------------------------------
122 // State accessors
123
124 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
125 LastFrameAccessor last_frame(current);
126 last_frame.set_bcp(bcp);
127 if (ProfileInterpreter) {
128 // ProfileTraps uses MDOs independently of ProfileInterpreter.
129 // That is why we must check both ProfileInterpreter and mdo != nullptr.
130 MethodData* mdo = last_frame.method()->method_data();
131 if (mdo != nullptr) {
132 NEEDS_CLEANUP;
133 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
134 }
135 }
136 }
137
138 //------------------------------------------------------------------------------------------------------------------------
139 // Constants
140
141
142 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
143 // access constant pool
144 LastFrameAccessor last_frame(current);
145 ConstantPool* pool = last_frame.method()->constants();
146 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
147 constantTag tag = pool->tag_at(cp_index);
148
149 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
150 Klass* klass = pool->klass_at(cp_index, CHECK);
151 oop java_class = klass->java_mirror();
152 current->set_vm_result_oop(java_class);
153 JRT_END
154
155 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
156 assert(bytecode == Bytecodes::_ldc ||
157 bytecode == Bytecodes::_ldc_w ||
158 bytecode == Bytecodes::_ldc2_w ||
159 bytecode == Bytecodes::_fast_aldc ||
160 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
161 ResourceMark rm(current);
162 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
163 bytecode == Bytecodes::_fast_aldc_w);
164 LastFrameAccessor last_frame(current);
165 methodHandle m (current, last_frame.method());
166 Bytecode_loadconstant ldc(m, last_frame.bci());
167
168 // Double-check the size. (Condy can have any type.)
169 BasicType type = ldc.result_type();
170 switch (type2size[type]) {
171 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
172 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
173 default: ShouldNotReachHere();
174 }
175
176 // Resolve the constant. This does not do unboxing.
177 // But it does replace Universe::the_null_sentinel by null.
178 oop result = ldc.resolve_constant(CHECK);
179 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
180
181 #ifdef ASSERT
182 {
183 // The bytecode wrappers aren't GC-safe so construct a new one
184 Bytecode_loadconstant ldc2(m, last_frame.bci());
185 int rindex = ldc2.cache_index();
186 if (rindex < 0)
187 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
188 if (rindex >= 0) {
189 oop coop = m->constants()->resolved_reference_at(rindex);
190 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
191 assert(roop == coop, "expected result for assembly code");
192 }
193 }
194 #endif
195 current->set_vm_result_oop(result);
196 if (!is_fast_aldc) {
197 // Tell the interpreter how to unbox the primitive.
198 guarantee(java_lang_boxing_object::is_instance(result, type), "");
199 int offset = java_lang_boxing_object::value_offset(type);
200 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
201 | (offset & ConstantPoolCache::field_index_mask));
202 current->set_vm_result_metadata((Metadata*)flags);
203 }
204 }
205 JRT_END
206
207
208 //------------------------------------------------------------------------------------------------------------------------
209 // Allocation
210
211 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
212 Klass* k = pool->klass_at(index, CHECK);
213 InstanceKlass* klass = InstanceKlass::cast(k);
214
215 // Make sure we are not instantiating an abstract klass
216 klass->check_valid_for_instantiation(true, CHECK);
217
218 // Make sure klass is initialized
219 klass->initialize(CHECK);
220
221 oop obj = klass->allocate_instance(CHECK);
222 current->set_vm_result_oop(obj);
223 JRT_END
224
225
226 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
227 oop obj = oopFactory::new_typeArray(type, size, CHECK);
228 current->set_vm_result_oop(obj);
229 JRT_END
230
231
232 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
233 Klass* klass = pool->klass_at(index, CHECK);
234 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
235 current->set_vm_result_oop(obj);
236 JRT_END
237
238
239 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
240 // We may want to pass in more arguments - could make this slightly faster
241 LastFrameAccessor last_frame(current);
242 ConstantPool* constants = last_frame.method()->constants();
243 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
244 Klass* klass = constants->klass_at(i, CHECK);
245 int nof_dims = last_frame.number_of_dimensions();
246 assert(klass->is_klass(), "not a class");
247 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
248
249 // We must create an array of jints to pass to multi_allocate.
250 ResourceMark rm(current);
251 const int small_dims = 10;
252 jint dim_array[small_dims];
253 jint *dims = &dim_array[0];
254 if (nof_dims > small_dims) {
255 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
256 }
257 for (int index = 0; index < nof_dims; index++) {
258 // offset from first_size_address is addressed as local[index]
259 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
260 dims[index] = first_size_address[n];
261 }
262 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
263 current->set_vm_result_oop(obj);
264 JRT_END
265
266
267 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
268 assert(oopDesc::is_oop(obj), "must be a valid oop");
269 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
270 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
271 JRT_END
272
273
274 // Quicken instance-of and check-cast bytecodes
275 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
276 // Force resolving; quicken the bytecode
277 LastFrameAccessor last_frame(current);
278 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
279 ConstantPool* cpool = last_frame.method()->constants();
280 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
281 // program we might have seen an unquick'd bytecode in the interpreter but have another
282 // thread quicken the bytecode before we get here.
283 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
284 Klass* klass = cpool->klass_at(which, CHECK);
285 current->set_vm_result_metadata(klass);
286 JRT_END
287
288
289 //------------------------------------------------------------------------------------------------------------------------
290 // Exceptions
291
292 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
293 const methodHandle& trap_method, int trap_bci) {
294 if (trap_method.not_null()) {
295 MethodData* trap_mdo = trap_method->method_data();
296 if (trap_mdo == nullptr) {
297 ExceptionMark em(current);
298 JavaThread* THREAD = current; // For exception macros.
299 Method::build_profiling_method_data(trap_method, THREAD);
300 if (HAS_PENDING_EXCEPTION) {
301 // Only metaspace OOM is expected. No Java code executed.
302 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
303 "we expect only an OOM error here");
304 CLEAR_PENDING_EXCEPTION;
305 }
306 trap_mdo = trap_method->method_data();
307 // and fall through...
308 }
309 if (trap_mdo != nullptr) {
310 // Update per-method count of trap events. The interpreter
311 // is updating the MDO to simulate the effect of compiler traps.
312 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
313 }
314 }
315 }
316
317 // Assume the compiler is (or will be) interested in this event.
318 // If necessary, create an MDO to hold the information, and record it.
319 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
320 assert(ProfileTraps, "call me only if profiling");
321 LastFrameAccessor last_frame(current);
322 methodHandle trap_method(current, last_frame.method());
323 int trap_bci = trap_method->bci_from(last_frame.bcp());
324 note_trap_inner(current, reason, trap_method, trap_bci);
325 }
326
327 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
328 // get klass
329 InstanceKlass* klass = InstanceKlass::cast(k);
330 assert(klass->is_initialized(),
331 "this klass should have been initialized during VM initialization");
332 // create instance - do not call constructor since we may have no
333 // (java) stack space left (should assert constructor is empty)
334 Handle exception;
335 oop exception_oop = klass->allocate_instance(CHECK_(exception));
336 exception = Handle(THREAD, exception_oop);
337 if (StackTraceInThrowable) {
338 java_lang_Throwable::fill_in_stack_trace(exception);
339 }
340 return exception;
341 }
342
343 // Special handling for stack overflow: since we don't have any (java) stack
344 // space left we use the pre-allocated & pre-initialized StackOverflowError
345 // klass to create an stack overflow error instance. We do not call its
346 // constructor for the same reason (it is empty, anyway).
347 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
348 Handle exception = get_preinitialized_exception(
349 vmClasses::StackOverflowError_klass(),
350 CHECK);
351 // Increment counter for hs_err file reporting
352 Atomic::inc(&Exceptions::_stack_overflow_errors);
353 // Remove the ScopedValue bindings in case we got a StackOverflowError
354 // while we were trying to manipulate ScopedValue bindings.
355 current->clear_scopedValueBindings();
356 THROW_HANDLE(exception);
357 JRT_END
358
359 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
360 Handle exception = get_preinitialized_exception(
361 vmClasses::StackOverflowError_klass(),
362 CHECK);
363 java_lang_Throwable::set_message(exception(),
364 Universe::delayed_stack_overflow_error_message());
365 // Increment counter for hs_err file reporting
366 Atomic::inc(&Exceptions::_stack_overflow_errors);
367 // Remove the ScopedValue bindings in case we got a StackOverflowError
368 // while we were trying to manipulate ScopedValue bindings.
369 current->clear_scopedValueBindings();
370 THROW_HANDLE(exception);
371 JRT_END
372
373 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
374 // lookup exception klass
375 TempNewSymbol s = SymbolTable::new_symbol(name);
376 if (ProfileTraps) {
377 if (s == vmSymbols::java_lang_ArithmeticException()) {
378 note_trap(current, Deoptimization::Reason_div0_check);
379 } else if (s == vmSymbols::java_lang_NullPointerException()) {
380 note_trap(current, Deoptimization::Reason_null_check);
381 }
382 }
383 // create exception
384 Handle exception = Exceptions::new_exception(current, s, message);
385 current->set_vm_result_oop(exception());
386 JRT_END
387
388
389 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
390 // Produce the error message first because note_trap can safepoint
391 ResourceMark rm(current);
392 const char* klass_name = obj->klass()->external_name();
393 // lookup exception klass
394 TempNewSymbol s = SymbolTable::new_symbol(name);
395 if (ProfileTraps) {
396 if (s == vmSymbols::java_lang_ArrayStoreException()) {
397 note_trap(current, Deoptimization::Reason_array_check);
398 } else {
399 note_trap(current, Deoptimization::Reason_class_check);
400 }
401 }
402 // create exception, with klass name as detail message
403 Handle exception = Exceptions::new_exception(current, s, klass_name);
404 current->set_vm_result_oop(exception());
405 JRT_END
406
407 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
408 // Produce the error message first because note_trap can safepoint
409 ResourceMark rm(current);
410 stringStream ss;
411 ss.print("Index %d out of bounds for length %d", index, a->length());
412
413 if (ProfileTraps) {
414 note_trap(current, Deoptimization::Reason_range_check);
415 }
416
417 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
418 JRT_END
419
420 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
421 JavaThread* current, oopDesc* obj))
422
423 // Produce the error message first because note_trap can safepoint
424 ResourceMark rm(current);
425 char* message = SharedRuntime::generate_class_cast_message(
426 current, obj->klass());
427
428 if (ProfileTraps) {
429 note_trap(current, Deoptimization::Reason_class_check);
430 }
431
432 // create exception
433 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
434 JRT_END
435
436 // exception_handler_for_exception(...) returns the continuation address,
437 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
438 // The exception oop is returned to make sure it is preserved over GC (it
439 // is only on the stack if the exception was thrown explicitly via athrow).
440 // During this operation, the expression stack contains the values for the
441 // bci where the exception happened. If the exception was propagated back
442 // from a call, the expression stack contains the values for the bci at the
443 // invoke w/o arguments (i.e., as if one were inside the call).
444 // Note that the implementation of this method assumes it's only called when an exception has actually occured
445 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
446 // We get here after we have unwound from a callee throwing an exception
447 // into the interpreter. Any deferred stack processing is notified of
448 // the event via the StackWatermarkSet.
449 StackWatermarkSet::after_unwind(current);
450
451 LastFrameAccessor last_frame(current);
452 Handle h_exception(current, exception);
453 methodHandle h_method (current, last_frame.method());
454 constantPoolHandle h_constants(current, h_method->constants());
455 bool should_repeat;
456 int handler_bci;
457 int current_bci = last_frame.bci();
458
459 if (current->frames_to_pop_failed_realloc() > 0) {
460 // Allocation of scalar replaced object used in this frame
461 // failed. Unconditionally pop the frame.
462 current->dec_frames_to_pop_failed_realloc();
463 current->set_vm_result_oop(h_exception());
464 // If the method is synchronized we already unlocked the monitor
465 // during deoptimization so the interpreter needs to skip it when
466 // the frame is popped.
467 current->set_do_not_unlock_if_synchronized(true);
468 return Interpreter::remove_activation_entry();
469 }
470
471 // Need to do this check first since when _do_not_unlock_if_synchronized
472 // is set, we don't want to trigger any classloading which may make calls
473 // into java, or surprisingly find a matching exception handler for bci 0
474 // since at this moment the method hasn't been "officially" entered yet.
475 if (current->do_not_unlock_if_synchronized()) {
476 ResourceMark rm;
477 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
478 current->set_vm_result_oop(exception);
479 return Interpreter::remove_activation_entry();
480 }
481
482 do {
483 should_repeat = false;
484
485 // assertions
486 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
487 // Check that exception is a subclass of Throwable.
488 assert(h_exception->is_a(vmClasses::Throwable_klass()),
489 "Exception not subclass of Throwable");
490
491 // tracing
492 if (log_is_enabled(Info, exceptions)) {
493 ResourceMark rm(current);
494 stringStream tempst;
495 tempst.print("interpreter method <%s>\n"
496 " at bci %d for thread " INTPTR_FORMAT " (%s)",
497 h_method->print_value_string(), current_bci, p2i(current), current->name());
498 Exceptions::log_exception(h_exception, tempst.as_string());
499 }
500 // Don't go paging in something which won't be used.
501 // else if (extable->length() == 0) {
502 // // disabled for now - interpreter is not using shortcut yet
503 // // (shortcut is not to call runtime if we have no exception handlers)
504 // // warning("performance bug: should not call runtime if method has no exception handlers");
505 // }
506 // for AbortVMOnException flag
507 Exceptions::debug_check_abort(h_exception);
508
509 // exception handler lookup
510 Klass* klass = h_exception->klass();
511 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
512 if (HAS_PENDING_EXCEPTION) {
513 // We threw an exception while trying to find the exception handler.
514 // Transfer the new exception to the exception handle which will
515 // be set into thread local storage, and do another lookup for an
516 // exception handler for this exception, this time starting at the
517 // BCI of the exception handler which caused the exception to be
518 // thrown (bug 4307310).
519 h_exception = Handle(THREAD, PENDING_EXCEPTION);
520 CLEAR_PENDING_EXCEPTION;
521 if (handler_bci >= 0) {
522 current_bci = handler_bci;
523 should_repeat = true;
524 }
525 }
526 } while (should_repeat == true);
527
528 #if INCLUDE_JVMCI
529 if (EnableJVMCI && h_method->method_data() != nullptr) {
530 ResourceMark rm(current);
531 MethodData* mdo = h_method->method_data();
532
533 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
534 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
535
536 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
537 if (pdata != nullptr && pdata->is_BitData()) {
538 BitData* bit_data = (BitData*) pdata;
539 bit_data->set_exception_seen();
540 }
541 }
542 #endif
543
544 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
545 // time throw or a stack unwinding throw and accordingly notify the debugger
546 if (JvmtiExport::can_post_on_exceptions()) {
547 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
548 }
549
550 address continuation = nullptr;
551 address handler_pc = nullptr;
552 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
553 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
554 // handler in this method, or (b) after a stack overflow there is not yet
555 // enough stack space available to reprotect the stack.
556 continuation = Interpreter::remove_activation_entry();
557 #if COMPILER2_OR_JVMCI
558 // Count this for compilation purposes
559 h_method->interpreter_throwout_increment(THREAD);
560 #endif
561 } else {
562 // handler in this method => change bci/bcp to handler bci/bcp and continue there
563 handler_pc = h_method->code_base() + handler_bci;
564 h_method->set_exception_handler_entered(handler_bci); // profiling
565 #ifndef ZERO
566 set_bcp_and_mdp(handler_pc, current);
567 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
568 #else
569 continuation = (address)(intptr_t) handler_bci;
570 #endif
571 }
572
573 // notify debugger of an exception catch
574 // (this is good for exceptions caught in native methods as well)
575 if (JvmtiExport::can_post_on_exceptions()) {
576 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
577 }
578
579 current->set_vm_result_oop(h_exception());
580 return continuation;
581 JRT_END
582
583
584 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current))
585 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
586 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
587 JRT_END
588
589
590 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
591 THROW(vmSymbols::java_lang_AbstractMethodError());
592 JRT_END
593
594 // This method is called from the "abstract_entry" of the interpreter.
595 // At that point, the arguments have already been removed from the stack
596 // and therefore we don't have the receiver object at our fingertips. (Though,
597 // on some platforms the receiver still resides in a register...). Thus,
598 // we have no choice but print an error message not containing the receiver
599 // type.
600 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
601 Method* missingMethod))
602 ResourceMark rm(current);
603 assert(missingMethod != nullptr, "sanity");
604 methodHandle m(current, missingMethod);
605 LinkResolver::throw_abstract_method_error(m, THREAD);
606 JRT_END
607
608 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
609 Klass* recvKlass,
610 Method* missingMethod))
611 ResourceMark rm(current);
612 methodHandle mh = methodHandle(current, missingMethod);
613 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
614 JRT_END
615
616
617 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
618 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
619 JRT_END
620
621 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
622 Klass* recvKlass,
623 Klass* interfaceKlass))
624 ResourceMark rm(current);
625 char buf[1000];
626 buf[0] = '\0';
627 jio_snprintf(buf, sizeof(buf),
628 "Class %s does not implement the requested interface %s",
629 recvKlass ? recvKlass->external_name() : "nullptr",
630 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
631 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
632 JRT_END
633
634 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
635 THROW(vmSymbols::java_lang_NullPointerException());
636 JRT_END
637
638 //------------------------------------------------------------------------------------------------------------------------
639 // Fields
640 //
641
642 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
643 LastFrameAccessor last_frame(current);
644 constantPoolHandle pool(current, last_frame.method()->constants());
645 methodHandle m(current, last_frame.method());
646
647 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current);
648 }
649
650 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
651 methodHandle& m,
652 constantPoolHandle& pool,
653 bool initialize_holder, TRAPS) {
654 fieldDescriptor info;
655 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
656 bytecode == Bytecodes::_putstatic);
657 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
658
659 {
660 JvmtiHideSingleStepping jhss(THREAD);
661 LinkResolver::resolve_field_access(info, pool, field_index,
662 m, bytecode, initialize_holder, CHECK);
663 } // end JvmtiHideSingleStepping
664
665 // check if link resolution caused cpCache to be updated
666 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
667
668 // compute auxiliary field attributes
669 TosState state = as_TosState(info.field_type());
670
671 // Resolution of put instructions on final fields is delayed. That is required so that
672 // exceptions are thrown at the correct place (when the instruction is actually invoked).
673 // If we do not resolve an instruction in the current pass, leaving the put_code
674 // set to zero will cause the next put instruction to the same field to reresolve.
675
676 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
677 // to final instance fields with updates originating from a method different than <init>)
678 // is inhibited. A putfield instruction targeting an instance final field must throw
679 // an IllegalAccessError if the instruction is not in an instance
680 // initializer method <init>. If resolution were not inhibited, a putfield
681 // in an initializer method could be resolved in the initializer. Subsequent
682 // putfield instructions to the same field would then use cached information.
683 // As a result, those instructions would not pass through the VM. That is,
684 // checks in resolve_field_access() would not be executed for those instructions
685 // and the required IllegalAccessError would not be thrown.
686 //
687 // Also, we need to delay resolving getstatic and putstatic instructions until the
688 // class is initialized. This is required so that access to the static
689 // field will call the initialization function every time until the class
690 // is completely initialized ala. in 2.17.5 in JVM Specification.
691 InstanceKlass* klass = info.field_holder();
692 bool uninitialized_static = is_static && !klass->is_initialized();
693 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
694 info.has_initialized_final_update();
695 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
696
697 Bytecodes::Code get_code = (Bytecodes::Code)0;
698 Bytecodes::Code put_code = (Bytecodes::Code)0;
699 if (!uninitialized_static) {
700 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
701 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
702 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
703 }
704 }
705
706 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
707 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
708 entry->fill_in(info.field_holder(), info.offset(),
709 checked_cast<u2>(info.index()), checked_cast<u1>(state),
710 static_cast<u1>(get_code), static_cast<u1>(put_code));
711 }
712
713
714 //------------------------------------------------------------------------------------------------------------------------
715 // Synchronization
716 //
717 // The interpreter's synchronization code is factored out so that it can
718 // be shared by method invocation and synchronized blocks.
719 //%note synchronization_3
720
721 //%note monitor_1
722 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
723 #ifdef ASSERT
724 current->last_frame().interpreter_frame_verify_monitor(elem);
725 #endif
726 Handle h_obj(current, elem->obj());
727 assert(Universe::heap()->is_in_or_null(h_obj()),
728 "must be null or an object");
729 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
730 assert(Universe::heap()->is_in_or_null(elem->obj()),
731 "must be null or an object");
732 #ifdef ASSERT
733 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem);
734 #endif
735 JRT_END
736
737 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
738 oop obj = elem->obj();
739 assert(Universe::heap()->is_in(obj), "must be an object");
740 // The object could become unlocked through a JNI call, which we have no other checks for.
741 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
742 if (obj->is_unlocked()) {
743 if (CheckJNICalls) {
744 fatal("Object has been unlocked by JNI");
745 }
746 return;
747 }
748 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
749 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
750 // again at method exit or in the case of an exception.
751 elem->set_obj(nullptr);
752 JRT_END
753
754
755 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
756 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
757 JRT_END
758
759
760 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
761 // Returns an illegal exception to install into the current thread. The
762 // pending_exception flag is cleared so normal exception handling does not
763 // trigger. Any current installed exception will be overwritten. This
764 // method will be called during an exception unwind.
765
766 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
767 Handle exception(current, current->vm_result_oop());
768 assert(exception() != nullptr, "vm result should be set");
769 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
770 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
771 current->set_vm_result_oop(exception());
772 JRT_END
773
774
775 //------------------------------------------------------------------------------------------------------------------------
776 // Invokes
777
778 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
779 return method->orig_bytecode_at(method->bci_from(bcp));
780 JRT_END
781
782 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
783 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
784 JRT_END
785
786 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
787 JvmtiExport::post_raw_breakpoint(current, method, bcp);
788 JRT_END
789
790 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
791 LastFrameAccessor last_frame(current);
792 // extract receiver from the outgoing argument list if necessary
793 Handle receiver(current, nullptr);
794 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
795 bytecode == Bytecodes::_invokespecial) {
796 ResourceMark rm(current);
797 methodHandle m (current, last_frame.method());
798 Bytecode_invoke call(m, last_frame.bci());
799 Symbol* signature = call.signature();
800 receiver = Handle(current, last_frame.callee_receiver(signature));
801
802 assert(Universe::heap()->is_in_or_null(receiver()),
803 "sanity check");
804 assert(receiver.is_null() ||
805 !Universe::heap()->is_in(receiver->klass()),
806 "sanity check");
807 }
808
809 // resolve method
810 CallInfo info;
811 constantPoolHandle pool(current, last_frame.method()->constants());
812
813 methodHandle resolved_method;
814
815 int method_index = last_frame.get_index_u2(bytecode);
816 {
817 JvmtiHideSingleStepping jhss(current);
818 JavaThread* THREAD = current; // For exception macros.
819 LinkResolver::resolve_invoke(info, receiver, pool,
820 method_index, bytecode,
821 THREAD);
822
823 if (HAS_PENDING_EXCEPTION) {
824 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
825 // Preserve the original exception across the call to note_trap()
826 PreserveExceptionMark pm(current);
827 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
828 note_trap(current, Deoptimization::Reason_null_check);
829 }
830 return;
831 }
832
833 resolved_method = methodHandle(current, info.resolved_method());
834 } // end JvmtiHideSingleStepping
835
836 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
837 }
838
839 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
840 methodHandle& resolved_method,
841 constantPoolHandle& pool,
842 int method_index) {
843 // Don't allow safepoints until the method is cached.
844 NoSafepointVerifier nsv;
845
846 // check if link resolution caused cpCache to be updated
847 ConstantPoolCache* cache = pool->cache();
848 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
849
850 #ifdef ASSERT
851 if (bytecode == Bytecodes::_invokeinterface) {
852 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
853 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
854 // (see also CallInfo::set_interface for details)
855 assert(info.call_kind() == CallInfo::vtable_call ||
856 info.call_kind() == CallInfo::direct_call, "");
857 assert(resolved_method->is_final() || info.has_vtable_index(),
858 "should have been set already");
859 } else if (!resolved_method->has_itable_index()) {
860 // Resolved something like CharSequence.toString. Use vtable not itable.
861 assert(info.call_kind() != CallInfo::itable_call, "");
862 } else {
863 // Setup itable entry
864 assert(info.call_kind() == CallInfo::itable_call, "");
865 int index = resolved_method->itable_index();
866 assert(info.itable_index() == index, "");
867 }
868 } else if (bytecode == Bytecodes::_invokespecial) {
869 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
870 } else {
871 assert(info.call_kind() == CallInfo::direct_call ||
872 info.call_kind() == CallInfo::vtable_call, "");
873 }
874 #endif
875 // Get sender and only set cpCache entry to resolved if it is not an
876 // interface. The receiver for invokespecial calls within interface
877 // methods must be checked for every call.
878 InstanceKlass* sender = pool->pool_holder();
879
880 switch (info.call_kind()) {
881 case CallInfo::direct_call:
882 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
883 break;
884 case CallInfo::vtable_call:
885 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
886 break;
887 case CallInfo::itable_call:
888 cache->set_itable_call(
889 bytecode,
890 method_index,
891 info.resolved_klass(),
892 resolved_method,
893 info.itable_index());
894 break;
895 default: ShouldNotReachHere();
896 }
897 }
898
899 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
900 constantPoolHandle& pool, TRAPS) {
901 LinkInfo link_info(pool, method_index, bytecode, CHECK);
902
903 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
904 CallInfo call_info;
905 switch (bytecode) {
906 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
907 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
908 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
909
910 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
911 }
912 methodHandle resolved_method(THREAD, call_info.resolved_method());
913 guarantee(resolved_method->method_holder()->is_linked(), "");
914 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
915 } else {
916 // FIXME: why a shared class is not linked yet?
917 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
918 ResourceMark rm;
919 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
920 log_info(cds, resolve)("Not resolved: class not linked: %s %s %s",
921 resolved_iklass->is_shared() ? "is_shared" : "",
922 resolved_iklass->init_state_name(),
923 resolved_iklass->external_name());
924 }
925 }
926
927 // First time execution: Resolve symbols, create a permanent MethodType object.
928 void InterpreterRuntime::resolve_invokehandle(JavaThread* current) {
929 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
930 LastFrameAccessor last_frame(current);
931
932 // resolve method
933 CallInfo info;
934 constantPoolHandle pool(current, last_frame.method()->constants());
935 int method_index = last_frame.get_index_u2(bytecode);
936 {
937 JvmtiHideSingleStepping jhss(current);
938 JavaThread* THREAD = current; // For exception macros.
939 LinkResolver::resolve_invoke(info, Handle(), pool,
940 method_index, bytecode,
941 CHECK);
942 } // end JvmtiHideSingleStepping
943
944 pool->cache()->set_method_handle(method_index, info);
945 }
946
947 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
948 constantPoolHandle& pool, TRAPS) {
949 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
950 CallInfo info;
951 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
952
953 pool->cache()->set_method_handle(raw_index, info);
954 }
955
956 // First time execution: Resolve symbols, create a permanent CallSite object.
957 void InterpreterRuntime::resolve_invokedynamic(JavaThread* current) {
958 LastFrameAccessor last_frame(current);
959 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
960
961 // resolve method
962 CallInfo info;
963 constantPoolHandle pool(current, last_frame.method()->constants());
964 int index = last_frame.get_index_u4(bytecode);
965 {
966 JvmtiHideSingleStepping jhss(current);
967 JavaThread* THREAD = current; // For exception macros.
968 LinkResolver::resolve_invoke(info, Handle(), pool,
969 index, bytecode, CHECK);
970 } // end JvmtiHideSingleStepping
971
972 pool->cache()->set_dynamic_call(info, index);
973 }
974
975 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
976 constantPoolHandle& pool, TRAPS) {
977 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
978 CallInfo info;
979 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
980 pool->cache()->set_dynamic_call(info, raw_index);
981 }
982
983 // This function is the interface to the assembly code. It returns the resolved
984 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
985 // This function will check for redefinition!
986 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
987 switch (bytecode) {
988 case Bytecodes::_getstatic:
989 case Bytecodes::_putstatic:
990 case Bytecodes::_getfield:
991 case Bytecodes::_putfield:
992 resolve_get_put(current, bytecode);
993 break;
994 case Bytecodes::_invokevirtual:
995 case Bytecodes::_invokespecial:
996 case Bytecodes::_invokestatic:
997 case Bytecodes::_invokeinterface:
998 resolve_invoke(current, bytecode);
999 break;
1000 case Bytecodes::_invokehandle:
1001 resolve_invokehandle(current);
1002 break;
1003 case Bytecodes::_invokedynamic:
1004 resolve_invokedynamic(current);
1005 break;
1006 default:
1007 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1008 break;
1009 }
1010 }
1011 JRT_END
1012
1013 //------------------------------------------------------------------------------------------------------------------------
1014 // Miscellaneous
1015
1016
1017 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1018 // Enable WXWrite: the function is called directly by interpreter.
1019 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1020
1021 // frequency_counter_overflow_inner can throw async exception.
1022 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1023 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1024 if (branch_bcp != nullptr && nm != nullptr) {
1025 // This was a successful request for an OSR nmethod. Because
1026 // frequency_counter_overflow_inner ends with a safepoint check,
1027 // nm could have been unloaded so look it up again. It's unsafe
1028 // to examine nm directly since it might have been freed and used
1029 // for something else.
1030 LastFrameAccessor last_frame(current);
1031 Method* method = last_frame.method();
1032 int bci = method->bci_from(last_frame.bcp());
1033 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1034 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1035 if (nm != nullptr) {
1036 // in case the transition passed a safepoint we need to barrier this again
1037 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1038 nm = nullptr;
1039 }
1040 }
1041 }
1042 if (nm != nullptr && current->is_interp_only_mode()) {
1043 // Normally we never get an nm if is_interp_only_mode() is true, because
1044 // policy()->event has a check for this and won't compile the method when
1045 // true. However, it's possible for is_interp_only_mode() to become true
1046 // during the compilation. We don't want to return the nm in that case
1047 // because we want to continue to execute interpreted.
1048 nm = nullptr;
1049 }
1050 #ifndef PRODUCT
1051 if (TraceOnStackReplacement) {
1052 if (nm != nullptr) {
1053 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1054 nm->print();
1055 }
1056 }
1057 #endif
1058 return nm;
1059 }
1060
1061 JRT_ENTRY(nmethod*,
1062 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1063 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1064 // flag, in case this method triggers classloading which will call into Java.
1065 UnlockFlagSaver fs(current);
1066
1067 LastFrameAccessor last_frame(current);
1068 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1069 methodHandle method(current, last_frame.method());
1070 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1071 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1072
1073 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1074
1075 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1076 if (osr_nm != nullptr) {
1077 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1078 osr_nm = nullptr;
1079 }
1080 }
1081 return osr_nm;
1082 JRT_END
1083
1084 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1085 assert(ProfileInterpreter, "must be profiling interpreter");
1086 int bci = method->bci_from(cur_bcp);
1087 MethodData* mdo = method->method_data();
1088 if (mdo == nullptr) return 0;
1089 return mdo->bci_to_di(bci);
1090 JRT_END
1091
1092 #ifdef ASSERT
1093 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1094 assert(ProfileInterpreter, "must be profiling interpreter");
1095
1096 MethodData* mdo = method->method_data();
1097 assert(mdo != nullptr, "must not be null");
1098
1099 int bci = method->bci_from(bcp);
1100
1101 address mdp2 = mdo->bci_to_dp(bci);
1102 if (mdp != mdp2) {
1103 ResourceMark rm;
1104 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1105 int current_di = mdo->dp_to_di(mdp);
1106 int expected_di = mdo->dp_to_di(mdp2);
1107 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1108 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1109 int approx_bci = -1;
1110 if (current_di >= 0) {
1111 approx_bci = mdo->data_at(current_di)->bci();
1112 }
1113 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1114 mdo->print_on(tty);
1115 method->print_codes();
1116 }
1117 assert(mdp == mdp2, "wrong mdp");
1118 JRT_END
1119 #endif // ASSERT
1120
1121 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1122 assert(ProfileInterpreter, "must be profiling interpreter");
1123 ResourceMark rm(current);
1124 LastFrameAccessor last_frame(current);
1125 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1126 MethodData* h_mdo = last_frame.method()->method_data();
1127
1128 // Grab a lock to ensure atomic access to setting the return bci and
1129 // the displacement. This can block and GC, invalidating all naked oops.
1130 MutexLocker ml(RetData_lock);
1131
1132 // ProfileData is essentially a wrapper around a derived oop, so we
1133 // need to take the lock before making any ProfileData structures.
1134 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1135 guarantee(data != nullptr, "profile data must be valid");
1136 RetData* rdata = data->as_RetData();
1137 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1138 last_frame.set_mdp(new_mdp);
1139 JRT_END
1140
1141 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1142 return Method::build_method_counters(current, m);
1143 JRT_END
1144
1145
1146 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current))
1147 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1148 // stack traversal automatically takes care of preserving arguments for invoke, so
1149 // this is no longer needed.
1150
1151 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1152 // if this is called during a safepoint
1153
1154 if (JvmtiExport::should_post_single_step()) {
1155 // This function is called by the interpreter when single stepping. Such single
1156 // stepping could unwind a frame. Then, it is important that we process any frames
1157 // that we might return into.
1158 StackWatermarkSet::before_unwind(current);
1159
1160 // We are called during regular safepoints and when the VM is
1161 // single stepping. If any thread is marked for single stepping,
1162 // then we may have JVMTI work to do.
1163 LastFrameAccessor last_frame(current);
1164 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1165 }
1166 JRT_END
1167
1168 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1169 assert(current == JavaThread::current(), "pre-condition");
1170 // This function is called by the interpreter when the return poll found a reason
1171 // to call the VM. The reason could be that we are returning into a not yet safe
1172 // to access frame. We handle that below.
1173 // Note that this path does not check for single stepping, because we do not want
1174 // to single step when unwinding frames for an exception being thrown. Instead,
1175 // such single stepping code will use the safepoint table, which will use the
1176 // InterpreterRuntime::at_safepoint callback.
1177 StackWatermarkSet::before_unwind(current);
1178 JRT_END
1179
1180 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1181 ResolvedFieldEntry *entry))
1182
1183 // check the access_flags for the field in the klass
1184
1185 InstanceKlass* ik = entry->field_holder();
1186 int index = entry->field_index();
1187 if (!ik->field_status(index).is_access_watched()) return;
1188
1189 bool is_static = (obj == nullptr);
1190 HandleMark hm(current);
1191
1192 Handle h_obj;
1193 if (!is_static) {
1194 // non-static field accessors have an object, but we need a handle
1195 h_obj = Handle(current, obj);
1196 }
1197 InstanceKlass* field_holder = entry->field_holder(); // HERE
1198 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1199 LastFrameAccessor last_frame(current);
1200 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1201 JRT_END
1202
1203 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1204 ResolvedFieldEntry *entry, jvalue *value))
1205
1206 InstanceKlass* ik = entry->field_holder();
1207
1208 // check the access_flags for the field in the klass
1209 int index = entry->field_index();
1210 // bail out if field modifications are not watched
1211 if (!ik->field_status(index).is_modification_watched()) return;
1212
1213 char sig_type = '\0';
1214
1215 switch((TosState)entry->tos_state()) {
1216 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1217 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1218 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1219 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1220 case itos: sig_type = JVM_SIGNATURE_INT; break;
1221 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1222 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1223 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1224 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1225 default: ShouldNotReachHere(); return;
1226 }
1227 bool is_static = (obj == nullptr);
1228
1229 HandleMark hm(current);
1230 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1231 jvalue fvalue;
1232 #ifdef _LP64
1233 fvalue = *value;
1234 #else
1235 // Long/double values are stored unaligned and also noncontiguously with
1236 // tagged stacks. We can't just do a simple assignment even in the non-
1237 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1238 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1239 // We assume that the two halves of longs/doubles are stored in interpreter
1240 // stack slots in platform-endian order.
1241 jlong_accessor u;
1242 jint* newval = (jint*)value;
1243 u.words[0] = newval[0];
1244 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1245 fvalue.j = u.long_value;
1246 #endif // _LP64
1247
1248 Handle h_obj;
1249 if (!is_static) {
1250 // non-static field accessors have an object, but we need a handle
1251 h_obj = Handle(current, obj);
1252 }
1253
1254 LastFrameAccessor last_frame(current);
1255 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1256 fid, sig_type, &fvalue);
1257 JRT_END
1258
1259 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current))
1260 LastFrameAccessor last_frame(current);
1261 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1262 JRT_END
1263
1264
1265 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1266 // before transitioning to VM, and restore it after transitioning back
1267 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1268 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current))
1269 LastFrameAccessor last_frame(current);
1270 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1271 JRT_END
1272
1273 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1274 {
1275 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1276 }
1277 JRT_END
1278
1279
1280 // Implementation of SignatureHandlerLibrary
1281
1282 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1283 // Dummy definition (else normalization method is defined in CPU
1284 // dependent code)
1285 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1286 return fingerprint;
1287 }
1288 #endif
1289
1290 address SignatureHandlerLibrary::set_handler_blob() {
1291 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1292 if (handler_blob == nullptr) {
1293 return nullptr;
1294 }
1295 address handler = handler_blob->code_begin();
1296 _handler_blob = handler_blob;
1297 _handler = handler;
1298 return handler;
1299 }
1300
1301 void SignatureHandlerLibrary::initialize() {
1302 if (_fingerprints != nullptr) {
1303 return;
1304 }
1305 if (set_handler_blob() == nullptr) {
1306 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1307 }
1308
1309 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1310 SignatureHandlerLibrary::buffer_size);
1311 _buffer = bb->code_begin();
1312
1313 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1314 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1315 }
1316
1317 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1318 address handler = _handler;
1319 int insts_size = buffer->pure_insts_size();
1320 if (handler + insts_size > _handler_blob->code_end()) {
1321 // get a new handler blob
1322 handler = set_handler_blob();
1323 }
1324 if (handler != nullptr) {
1325 memcpy(handler, buffer->insts_begin(), insts_size);
1326 pd_set_handler(handler);
1327 ICache::invalidate_range(handler, insts_size);
1328 _handler = handler + insts_size;
1329 }
1330 return handler;
1331 }
1332
1333 void SignatureHandlerLibrary::add(const methodHandle& method) {
1334 if (method->signature_handler() == nullptr) {
1335 // use slow signature handler if we can't do better
1336 int handler_index = -1;
1337 // check if we can use customized (fast) signature handler
1338 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1339 // use customized signature handler
1340 MutexLocker mu(SignatureHandlerLibrary_lock);
1341 // make sure data structure is initialized
1342 initialize();
1343 // lookup method signature's fingerprint
1344 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1345 // allow CPU dependent code to optimize the fingerprints for the fast handler
1346 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1347 handler_index = _fingerprints->find(fingerprint);
1348 // create handler if necessary
1349 if (handler_index < 0) {
1350 ResourceMark rm;
1351 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1352 CodeBuffer buffer((address)(_buffer + align_offset),
1353 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1354 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1355 // copy into code heap
1356 address handler = set_handler(&buffer);
1357 if (handler == nullptr) {
1358 // use slow signature handler (without memorizing it in the fingerprints)
1359 } else {
1360 // debugging support
1361 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1362 ttyLocker ttyl;
1363 tty->cr();
1364 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1365 _handlers->length(),
1366 (method->is_static() ? "static" : "receiver"),
1367 method->name_and_sig_as_C_string(),
1368 fingerprint,
1369 buffer.insts_size());
1370 if (buffer.insts_size() > 0) {
1371 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1372 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1373 }
1374 #ifndef PRODUCT
1375 address rh_begin = Interpreter::result_handler(method()->result_type());
1376 if (CodeCache::contains(rh_begin)) {
1377 // else it might be special platform dependent values
1378 tty->print_cr(" --- associated result handler ---");
1379 address rh_end = rh_begin;
1380 while (*(int*)rh_end != 0) {
1381 rh_end += sizeof(int);
1382 }
1383 Disassembler::decode(rh_begin, rh_end);
1384 } else {
1385 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1386 }
1387 #endif
1388 }
1389 // add handler to library
1390 _fingerprints->append(fingerprint);
1391 _handlers->append(handler);
1392 // set handler index
1393 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1394 handler_index = _fingerprints->length() - 1;
1395 }
1396 }
1397 // Set handler under SignatureHandlerLibrary_lock
1398 if (handler_index < 0) {
1399 // use generic signature handler
1400 method->set_signature_handler(Interpreter::slow_signature_handler());
1401 } else {
1402 // set handler
1403 method->set_signature_handler(_handlers->at(handler_index));
1404 }
1405 } else {
1406 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1407 // use generic signature handler
1408 method->set_signature_handler(Interpreter::slow_signature_handler());
1409 }
1410 }
1411 #ifdef ASSERT
1412 int handler_index = -1;
1413 int fingerprint_index = -2;
1414 {
1415 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1416 // in any way if accessed from multiple threads. To avoid races with another
1417 // thread which may change the arrays in the above, mutex protected block, we
1418 // have to protect this read access here with the same mutex as well!
1419 MutexLocker mu(SignatureHandlerLibrary_lock);
1420 if (_handlers != nullptr) {
1421 handler_index = _handlers->find(method->signature_handler());
1422 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1423 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1424 fingerprint_index = _fingerprints->find(fingerprint);
1425 }
1426 }
1427 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1428 handler_index == fingerprint_index, "sanity check");
1429 #endif // ASSERT
1430 }
1431
1432 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1433 address SignatureHandlerLibrary::_handler = nullptr;
1434 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1435 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1436 address SignatureHandlerLibrary::_buffer = nullptr;
1437
1438
1439 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1440 methodHandle m(current, method);
1441 assert(m->is_native(), "sanity check");
1442 // lookup native function entry point if it doesn't exist
1443 if (!m->has_native_function()) {
1444 NativeLookup::lookup(m, CHECK);
1445 }
1446 // make sure signature handler is installed
1447 SignatureHandlerLibrary::add(m);
1448 // The interpreter entry point checks the signature handler first,
1449 // before trying to fetch the native entry point and klass mirror.
1450 // We must set the signature handler last, so that multiple processors
1451 // preparing the same method will be sure to see non-null entry & mirror.
1452 JRT_END
1453
1454 #if defined(IA32) || defined(AMD64) || defined(ARM)
1455 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1456 assert(current == JavaThread::current(), "pre-condition");
1457 if (src_address == dest_address) {
1458 return;
1459 }
1460 ResourceMark rm;
1461 LastFrameAccessor last_frame(current);
1462 assert(last_frame.is_interpreted_frame(), "");
1463 jint bci = last_frame.bci();
1464 methodHandle mh(current, last_frame.method());
1465 Bytecode_invoke invoke(mh, bci);
1466 ArgumentSizeComputer asc(invoke.signature());
1467 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1468 Copy::conjoint_jbytes(src_address, dest_address,
1469 size_of_arguments * Interpreter::stackElementSize);
1470 JRT_END
1471 #endif
1472
1473 #if INCLUDE_JVMTI
1474 // This is a support of the JVMTI PopFrame interface.
1475 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1476 // and return it as a vm_result_oop so that it can be reloaded in the list of invokestatic parameters.
1477 // The member_name argument is a saved reference (in local#0) to the member_name.
1478 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1479 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1480 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1481 Method* method, address bcp))
1482 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1483 if (code != Bytecodes::_invokestatic) {
1484 return;
1485 }
1486 ConstantPool* cpool = method->constants();
1487 int cp_index = Bytes::get_native_u2(bcp + 1);
1488 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1489 Symbol* mname = cpool->name_ref_at(cp_index, code);
1490
1491 if (MethodHandles::has_member_arg(cname, mname)) {
1492 oop member_name_oop = cast_to_oop(member_name);
1493 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1494 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1495 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1496 }
1497 current->set_vm_result_oop(member_name_oop);
1498 } else {
1499 current->set_vm_result_oop(nullptr);
1500 }
1501 JRT_END
1502 #endif // INCLUDE_JVMTI
1503
1504 #ifndef PRODUCT
1505 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1506 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1507 // The generated code still uses call_VM because that will set up the frame pointer for
1508 // bcp and method.
1509 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1510 assert(current == JavaThread::current(), "pre-condition");
1511 LastFrameAccessor last_frame(current);
1512 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1513 methodHandle mh(current, last_frame.method());
1514 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1515 return preserve_this_value;
1516 JRT_END
1517 #endif // !PRODUCT