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 #if INCLUDE_JFR
79 #include "jfr/jfr.inline.hpp"
80 #endif
81
82 // Helper class to access current interpreter state
83 class LastFrameAccessor : public StackObj {
84 frame _last_frame;
85 public:
86 LastFrameAccessor(JavaThread* current) {
87 assert(current == Thread::current(), "sanity");
88 _last_frame = current->last_frame();
89 }
90 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
91 Method* method() const { return _last_frame.interpreter_frame_method(); }
92 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
93 int bci() const { return _last_frame.interpreter_frame_bci(); }
94 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
95
96 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
97 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
98
99 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
100 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
101
102 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
103 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
104 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
105 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
106 int number_of_dimensions() const { return bcp()[3]; }
107
108 oop callee_receiver(Symbol* signature) {
109 return _last_frame.interpreter_callee_receiver(signature);
110 }
111 BasicObjectLock* monitor_begin() const {
112 return _last_frame.interpreter_frame_monitor_begin();
113 }
114 BasicObjectLock* monitor_end() const {
115 return _last_frame.interpreter_frame_monitor_end();
116 }
117 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
118 return _last_frame.next_monitor_in_interpreter_frame(current);
119 }
120
121 frame& get_frame() { return _last_frame; }
122 };
123
124 //------------------------------------------------------------------------------------------------------------------------
125 // State accessors
126
127 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
128 LastFrameAccessor last_frame(current);
129 last_frame.set_bcp(bcp);
130 if (ProfileInterpreter) {
131 // ProfileTraps uses MDOs independently of ProfileInterpreter.
132 // That is why we must check both ProfileInterpreter and mdo != nullptr.
133 MethodData* mdo = last_frame.method()->method_data();
134 if (mdo != nullptr) {
135 NEEDS_CLEANUP;
136 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
137 }
138 }
139 }
140
141 //------------------------------------------------------------------------------------------------------------------------
142 // Constants
143
144
145 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
146 // access constant pool
147 LastFrameAccessor last_frame(current);
148 ConstantPool* pool = last_frame.method()->constants();
149 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
150 constantTag tag = pool->tag_at(cp_index);
151
152 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
153 Klass* klass = pool->klass_at(cp_index, CHECK);
154 oop java_class = klass->java_mirror();
155 current->set_vm_result_oop(java_class);
156 JRT_END
157
158 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
159 assert(bytecode == Bytecodes::_ldc ||
160 bytecode == Bytecodes::_ldc_w ||
161 bytecode == Bytecodes::_ldc2_w ||
162 bytecode == Bytecodes::_fast_aldc ||
163 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
164 ResourceMark rm(current);
165 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
166 bytecode == Bytecodes::_fast_aldc_w);
167 LastFrameAccessor last_frame(current);
168 methodHandle m (current, last_frame.method());
169 Bytecode_loadconstant ldc(m, last_frame.bci());
170
171 // Double-check the size. (Condy can have any type.)
172 BasicType type = ldc.result_type();
173 switch (type2size[type]) {
174 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
175 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
176 default: ShouldNotReachHere();
177 }
178
179 // Resolve the constant. This does not do unboxing.
180 // But it does replace Universe::the_null_sentinel by null.
181 oop result = ldc.resolve_constant(CHECK);
182 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
183
184 #ifdef ASSERT
185 {
186 // The bytecode wrappers aren't GC-safe so construct a new one
187 Bytecode_loadconstant ldc2(m, last_frame.bci());
188 int rindex = ldc2.cache_index();
189 if (rindex < 0)
190 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
191 if (rindex >= 0) {
192 oop coop = m->constants()->resolved_reference_at(rindex);
193 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
194 assert(roop == coop, "expected result for assembly code");
195 }
196 }
197 #endif
198 current->set_vm_result_oop(result);
199 if (!is_fast_aldc) {
200 // Tell the interpreter how to unbox the primitive.
201 guarantee(java_lang_boxing_object::is_instance(result, type), "");
202 int offset = java_lang_boxing_object::value_offset(type);
203 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
204 | (offset & ConstantPoolCache::field_index_mask));
205 current->set_vm_result_metadata((Metadata*)flags);
206 }
207 }
208 JRT_END
209
210
211 //------------------------------------------------------------------------------------------------------------------------
212 // Allocation
213
214 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
215 Klass* k = pool->klass_at(index, CHECK);
216 InstanceKlass* klass = InstanceKlass::cast(k);
217
218 // Make sure we are not instantiating an abstract klass
219 klass->check_valid_for_instantiation(true, CHECK);
220
221 // Make sure klass is initialized
222 klass->initialize(CHECK);
223
224 oop obj = klass->allocate_instance(CHECK);
225 current->set_vm_result_oop(obj);
226 JRT_END
227
228
229 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
230 oop obj = oopFactory::new_typeArray(type, size, CHECK);
231 current->set_vm_result_oop(obj);
232 JRT_END
233
234
235 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
236 Klass* klass = pool->klass_at(index, CHECK);
237 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
238 current->set_vm_result_oop(obj);
239 JRT_END
240
241
242 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
243 // We may want to pass in more arguments - could make this slightly faster
244 LastFrameAccessor last_frame(current);
245 ConstantPool* constants = last_frame.method()->constants();
246 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
247 Klass* klass = constants->klass_at(i, CHECK);
248 int nof_dims = last_frame.number_of_dimensions();
249 assert(klass->is_klass(), "not a class");
250 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
251
252 // We must create an array of jints to pass to multi_allocate.
253 ResourceMark rm(current);
254 const int small_dims = 10;
255 jint dim_array[small_dims];
256 jint *dims = &dim_array[0];
257 if (nof_dims > small_dims) {
258 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
259 }
260 for (int index = 0; index < nof_dims; index++) {
261 // offset from first_size_address is addressed as local[index]
262 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
263 dims[index] = first_size_address[n];
264 }
265 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
266 current->set_vm_result_oop(obj);
267 JRT_END
268
269
270 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
271 assert(oopDesc::is_oop(obj), "must be a valid oop");
272 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
273 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
274 JRT_END
275
276
277 // Quicken instance-of and check-cast bytecodes
278 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
279 // Force resolving; quicken the bytecode
280 LastFrameAccessor last_frame(current);
281 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
282 ConstantPool* cpool = last_frame.method()->constants();
283 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
284 // program we might have seen an unquick'd bytecode in the interpreter but have another
285 // thread quicken the bytecode before we get here.
286 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
287 Klass* klass = cpool->klass_at(which, CHECK);
288 current->set_vm_result_metadata(klass);
289 JRT_END
290
291
292 //------------------------------------------------------------------------------------------------------------------------
293 // Exceptions
294
295 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
296 const methodHandle& trap_method, int trap_bci) {
297 if (trap_method.not_null()) {
298 MethodData* trap_mdo = trap_method->method_data();
299 if (trap_mdo == nullptr) {
300 ExceptionMark em(current);
301 JavaThread* THREAD = current; // For exception macros.
302 Method::build_profiling_method_data(trap_method, THREAD);
303 if (HAS_PENDING_EXCEPTION) {
304 // Only metaspace OOM is expected. No Java code executed.
305 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
306 "we expect only an OOM error here");
307 CLEAR_PENDING_EXCEPTION;
308 }
309 trap_mdo = trap_method->method_data();
310 // and fall through...
311 }
312 if (trap_mdo != nullptr) {
313 // Update per-method count of trap events. The interpreter
314 // is updating the MDO to simulate the effect of compiler traps.
315 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
316 }
317 }
318 }
319
320 // Assume the compiler is (or will be) interested in this event.
321 // If necessary, create an MDO to hold the information, and record it.
322 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
323 assert(ProfileTraps, "call me only if profiling");
324 LastFrameAccessor last_frame(current);
325 methodHandle trap_method(current, last_frame.method());
326 int trap_bci = trap_method->bci_from(last_frame.bcp());
327 note_trap_inner(current, reason, trap_method, trap_bci);
328 }
329
330 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
331 // get klass
332 InstanceKlass* klass = InstanceKlass::cast(k);
333 assert(klass->is_initialized(),
334 "this klass should have been initialized during VM initialization");
335 // create instance - do not call constructor since we may have no
336 // (java) stack space left (should assert constructor is empty)
337 Handle exception;
338 oop exception_oop = klass->allocate_instance(CHECK_(exception));
339 exception = Handle(THREAD, exception_oop);
340 if (StackTraceInThrowable) {
341 java_lang_Throwable::fill_in_stack_trace(exception);
342 }
343 return exception;
344 }
345
346 // Special handling for stack overflow: since we don't have any (java) stack
347 // space left we use the pre-allocated & pre-initialized StackOverflowError
348 // klass to create an stack overflow error instance. We do not call its
349 // constructor for the same reason (it is empty, anyway).
350 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
351 Handle exception = get_preinitialized_exception(
352 vmClasses::StackOverflowError_klass(),
353 CHECK);
354 // Increment counter for hs_err file reporting
355 Atomic::inc(&Exceptions::_stack_overflow_errors);
356 // Remove the ScopedValue bindings in case we got a StackOverflowError
357 // while we were trying to manipulate ScopedValue bindings.
358 current->clear_scopedValueBindings();
359 THROW_HANDLE(exception);
360 JRT_END
361
362 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
363 Handle exception = get_preinitialized_exception(
364 vmClasses::StackOverflowError_klass(),
365 CHECK);
366 java_lang_Throwable::set_message(exception(),
367 Universe::delayed_stack_overflow_error_message());
368 // Increment counter for hs_err file reporting
369 Atomic::inc(&Exceptions::_stack_overflow_errors);
370 // Remove the ScopedValue bindings in case we got a StackOverflowError
371 // while we were trying to manipulate ScopedValue bindings.
372 current->clear_scopedValueBindings();
373 THROW_HANDLE(exception);
374 JRT_END
375
376 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
377 // lookup exception klass
378 TempNewSymbol s = SymbolTable::new_symbol(name);
379 if (ProfileTraps) {
380 if (s == vmSymbols::java_lang_ArithmeticException()) {
381 note_trap(current, Deoptimization::Reason_div0_check);
382 } else if (s == vmSymbols::java_lang_NullPointerException()) {
383 note_trap(current, Deoptimization::Reason_null_check);
384 }
385 }
386 // create exception
387 Handle exception = Exceptions::new_exception(current, s, message);
388 current->set_vm_result_oop(exception());
389 JRT_END
390
391
392 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
393 // Produce the error message first because note_trap can safepoint
394 ResourceMark rm(current);
395 const char* klass_name = obj->klass()->external_name();
396 // lookup exception klass
397 TempNewSymbol s = SymbolTable::new_symbol(name);
398 if (ProfileTraps) {
399 if (s == vmSymbols::java_lang_ArrayStoreException()) {
400 note_trap(current, Deoptimization::Reason_array_check);
401 } else {
402 note_trap(current, Deoptimization::Reason_class_check);
403 }
404 }
405 // create exception, with klass name as detail message
406 Handle exception = Exceptions::new_exception(current, s, klass_name);
407 current->set_vm_result_oop(exception());
408 JRT_END
409
410 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
411 // Produce the error message first because note_trap can safepoint
412 ResourceMark rm(current);
413 stringStream ss;
414 ss.print("Index %d out of bounds for length %d", index, a->length());
415
416 if (ProfileTraps) {
417 note_trap(current, Deoptimization::Reason_range_check);
418 }
419
420 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
421 JRT_END
422
423 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
424 JavaThread* current, oopDesc* obj))
425
426 // Produce the error message first because note_trap can safepoint
427 ResourceMark rm(current);
428 char* message = SharedRuntime::generate_class_cast_message(
429 current, obj->klass());
430
431 if (ProfileTraps) {
432 note_trap(current, Deoptimization::Reason_class_check);
433 }
434
435 // create exception
436 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
437 JRT_END
438
439 // exception_handler_for_exception(...) returns the continuation address,
440 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
441 // The exception oop is returned to make sure it is preserved over GC (it
442 // is only on the stack if the exception was thrown explicitly via athrow).
443 // During this operation, the expression stack contains the values for the
444 // bci where the exception happened. If the exception was propagated back
445 // from a call, the expression stack contains the values for the bci at the
446 // invoke w/o arguments (i.e., as if one were inside the call).
447 // Note that the implementation of this method assumes it's only called when an exception has actually occured
448 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
449 // We get here after we have unwound from a callee throwing an exception
450 // into the interpreter. Any deferred stack processing is notified of
451 // the event via the StackWatermarkSet.
452 StackWatermarkSet::after_unwind(current);
453
454 LastFrameAccessor last_frame(current);
455 Handle h_exception(current, exception);
456 methodHandle h_method (current, last_frame.method());
457 constantPoolHandle h_constants(current, h_method->constants());
458 bool should_repeat;
459 int handler_bci;
460 int current_bci = last_frame.bci();
461
462 if (current->frames_to_pop_failed_realloc() > 0) {
463 // Allocation of scalar replaced object used in this frame
464 // failed. Unconditionally pop the frame.
465 current->dec_frames_to_pop_failed_realloc();
466 current->set_vm_result_oop(h_exception());
467 // If the method is synchronized we already unlocked the monitor
468 // during deoptimization so the interpreter needs to skip it when
469 // the frame is popped.
470 current->set_do_not_unlock_if_synchronized(true);
471 return Interpreter::remove_activation_entry();
472 }
473
474 // Need to do this check first since when _do_not_unlock_if_synchronized
475 // is set, we don't want to trigger any classloading which may make calls
476 // into java, or surprisingly find a matching exception handler for bci 0
477 // since at this moment the method hasn't been "officially" entered yet.
478 if (current->do_not_unlock_if_synchronized()) {
479 ResourceMark rm;
480 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
481 current->set_vm_result_oop(exception);
482 return Interpreter::remove_activation_entry();
483 }
484
485 do {
486 should_repeat = false;
487
488 // assertions
489 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
490 // Check that exception is a subclass of Throwable.
491 assert(h_exception->is_a(vmClasses::Throwable_klass()),
492 "Exception not subclass of Throwable");
493
494 // tracing
495 if (log_is_enabled(Info, exceptions)) {
496 ResourceMark rm(current);
497 stringStream tempst;
498 tempst.print("interpreter method <%s>\n"
499 " at bci %d for thread " INTPTR_FORMAT " (%s)",
500 h_method->print_value_string(), current_bci, p2i(current), current->name());
501 Exceptions::log_exception(h_exception, tempst.as_string());
502 }
503 // Don't go paging in something which won't be used.
504 // else if (extable->length() == 0) {
505 // // disabled for now - interpreter is not using shortcut yet
506 // // (shortcut is not to call runtime if we have no exception handlers)
507 // // warning("performance bug: should not call runtime if method has no exception handlers");
508 // }
509 // for AbortVMOnException flag
510 Exceptions::debug_check_abort(h_exception);
511
512 // exception handler lookup
513 Klass* klass = h_exception->klass();
514 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
515 if (HAS_PENDING_EXCEPTION) {
516 // We threw an exception while trying to find the exception handler.
517 // Transfer the new exception to the exception handle which will
518 // be set into thread local storage, and do another lookup for an
519 // exception handler for this exception, this time starting at the
520 // BCI of the exception handler which caused the exception to be
521 // thrown (bug 4307310).
522 h_exception = Handle(THREAD, PENDING_EXCEPTION);
523 CLEAR_PENDING_EXCEPTION;
524 if (handler_bci >= 0) {
525 current_bci = handler_bci;
526 should_repeat = true;
527 }
528 }
529 } while (should_repeat == true);
530
531 #if INCLUDE_JVMCI
532 if (EnableJVMCI && h_method->method_data() != nullptr) {
533 ResourceMark rm(current);
534 MethodData* mdo = h_method->method_data();
535
536 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
537 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
538
539 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
540 if (pdata != nullptr && pdata->is_BitData()) {
541 BitData* bit_data = (BitData*) pdata;
542 bit_data->set_exception_seen();
543 }
544 }
545 #endif
546
547 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
548 // time throw or a stack unwinding throw and accordingly notify the debugger
549 if (JvmtiExport::can_post_on_exceptions()) {
550 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
551 }
552
553 address continuation = nullptr;
554 address handler_pc = nullptr;
555 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
556 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
557 // handler in this method, or (b) after a stack overflow there is not yet
558 // enough stack space available to reprotect the stack.
559 continuation = Interpreter::remove_activation_entry();
560 #if COMPILER2_OR_JVMCI
561 // Count this for compilation purposes
562 h_method->interpreter_throwout_increment(THREAD);
563 #endif
564 } else {
565 // handler in this method => change bci/bcp to handler bci/bcp and continue there
566 handler_pc = h_method->code_base() + handler_bci;
567 h_method->set_exception_handler_entered(handler_bci); // profiling
568 #ifndef ZERO
569 set_bcp_and_mdp(handler_pc, current);
570 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
571 #else
572 continuation = (address)(intptr_t) handler_bci;
573 #endif
574 }
575
576 // notify debugger of an exception catch
577 // (this is good for exceptions caught in native methods as well)
578 if (JvmtiExport::can_post_on_exceptions()) {
579 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
580 }
581
582 current->set_vm_result_oop(h_exception());
583 return continuation;
584 JRT_END
585
586
587 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current))
588 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
589 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
590 JRT_END
591
592
593 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
594 THROW(vmSymbols::java_lang_AbstractMethodError());
595 JRT_END
596
597 // This method is called from the "abstract_entry" of the interpreter.
598 // At that point, the arguments have already been removed from the stack
599 // and therefore we don't have the receiver object at our fingertips. (Though,
600 // on some platforms the receiver still resides in a register...). Thus,
601 // we have no choice but print an error message not containing the receiver
602 // type.
603 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
604 Method* missingMethod))
605 ResourceMark rm(current);
606 assert(missingMethod != nullptr, "sanity");
607 methodHandle m(current, missingMethod);
608 LinkResolver::throw_abstract_method_error(m, THREAD);
609 JRT_END
610
611 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
612 Klass* recvKlass,
613 Method* missingMethod))
614 ResourceMark rm(current);
615 methodHandle mh = methodHandle(current, missingMethod);
616 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
617 JRT_END
618
619
620 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
621 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
622 JRT_END
623
624 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
625 Klass* recvKlass,
626 Klass* interfaceKlass))
627 ResourceMark rm(current);
628 char buf[1000];
629 buf[0] = '\0';
630 jio_snprintf(buf, sizeof(buf),
631 "Class %s does not implement the requested interface %s",
632 recvKlass ? recvKlass->external_name() : "nullptr",
633 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
634 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
635 JRT_END
636
637 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
638 THROW(vmSymbols::java_lang_NullPointerException());
639 JRT_END
640
641 //------------------------------------------------------------------------------------------------------------------------
642 // Fields
643 //
644
645 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
646 LastFrameAccessor last_frame(current);
647 constantPoolHandle pool(current, last_frame.method()->constants());
648 methodHandle m(current, last_frame.method());
649
650 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current);
651 }
652
653 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
654 methodHandle& m,
655 constantPoolHandle& pool,
656 bool initialize_holder, TRAPS) {
657 fieldDescriptor info;
658 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
659 bytecode == Bytecodes::_putstatic);
660 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
661
662 {
663 JvmtiHideSingleStepping jhss(THREAD);
664 LinkResolver::resolve_field_access(info, pool, field_index,
665 m, bytecode, initialize_holder, CHECK);
666 } // end JvmtiHideSingleStepping
667
668 // check if link resolution caused cpCache to be updated
669 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
670
671 // compute auxiliary field attributes
672 TosState state = as_TosState(info.field_type());
673
674 // Resolution of put instructions on final fields is delayed. That is required so that
675 // exceptions are thrown at the correct place (when the instruction is actually invoked).
676 // If we do not resolve an instruction in the current pass, leaving the put_code
677 // set to zero will cause the next put instruction to the same field to reresolve.
678
679 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
680 // to final instance fields with updates originating from a method different than <init>)
681 // is inhibited. A putfield instruction targeting an instance final field must throw
682 // an IllegalAccessError if the instruction is not in an instance
683 // initializer method <init>. If resolution were not inhibited, a putfield
684 // in an initializer method could be resolved in the initializer. Subsequent
685 // putfield instructions to the same field would then use cached information.
686 // As a result, those instructions would not pass through the VM. That is,
687 // checks in resolve_field_access() would not be executed for those instructions
688 // and the required IllegalAccessError would not be thrown.
689 //
690 // Also, we need to delay resolving getstatic and putstatic instructions until the
691 // class is initialized. This is required so that access to the static
692 // field will call the initialization function every time until the class
693 // is completely initialized ala. in 2.17.5 in JVM Specification.
694 InstanceKlass* klass = info.field_holder();
695 bool uninitialized_static = is_static && !klass->is_initialized();
696 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
697 info.has_initialized_final_update();
698 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
699
700 Bytecodes::Code get_code = (Bytecodes::Code)0;
701 Bytecodes::Code put_code = (Bytecodes::Code)0;
702 if (!uninitialized_static) {
703 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
704 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
705 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
706 }
707 }
708
709 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
710 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
711 entry->fill_in(info.field_holder(), info.offset(),
712 checked_cast<u2>(info.index()), checked_cast<u1>(state),
713 static_cast<u1>(get_code), static_cast<u1>(put_code));
714 }
715
716
717 //------------------------------------------------------------------------------------------------------------------------
718 // Synchronization
719 //
720 // The interpreter's synchronization code is factored out so that it can
721 // be shared by method invocation and synchronized blocks.
722 //%note synchronization_3
723
724 //%note monitor_1
725 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
726 #ifdef ASSERT
727 current->last_frame().interpreter_frame_verify_monitor(elem);
728 #endif
729 Handle h_obj(current, elem->obj());
730 assert(Universe::heap()->is_in_or_null(h_obj()),
731 "must be null or an object");
732 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
733 assert(Universe::heap()->is_in_or_null(elem->obj()),
734 "must be null or an object");
735 #ifdef ASSERT
736 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem);
737 #endif
738 JRT_END
739
740 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
741 oop obj = elem->obj();
742 assert(Universe::heap()->is_in(obj), "must be an object");
743 // The object could become unlocked through a JNI call, which we have no other checks for.
744 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
745 if (obj->is_unlocked()) {
746 if (CheckJNICalls) {
747 fatal("Object has been unlocked by JNI");
748 }
749 return;
750 }
751 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
752 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
753 // again at method exit or in the case of an exception.
754 elem->set_obj(nullptr);
755 JRT_END
756
757
758 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
759 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
760 JRT_END
761
762
763 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
764 // Returns an illegal exception to install into the current thread. The
765 // pending_exception flag is cleared so normal exception handling does not
766 // trigger. Any current installed exception will be overwritten. This
767 // method will be called during an exception unwind.
768
769 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
770 Handle exception(current, current->vm_result_oop());
771 assert(exception() != nullptr, "vm result should be set");
772 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
773 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
774 current->set_vm_result_oop(exception());
775 JRT_END
776
777
778 //------------------------------------------------------------------------------------------------------------------------
779 // Invokes
780
781 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
782 return method->orig_bytecode_at(method->bci_from(bcp));
783 JRT_END
784
785 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
786 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
787 JRT_END
788
789 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
790 JvmtiExport::post_raw_breakpoint(current, method, bcp);
791 JRT_END
792
793 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
794 LastFrameAccessor last_frame(current);
795 // extract receiver from the outgoing argument list if necessary
796 Handle receiver(current, nullptr);
797 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
798 bytecode == Bytecodes::_invokespecial) {
799 ResourceMark rm(current);
800 methodHandle m (current, last_frame.method());
801 Bytecode_invoke call(m, last_frame.bci());
802 Symbol* signature = call.signature();
803 receiver = Handle(current, last_frame.callee_receiver(signature));
804
805 assert(Universe::heap()->is_in_or_null(receiver()),
806 "sanity check");
807 assert(receiver.is_null() ||
808 !Universe::heap()->is_in(receiver->klass()),
809 "sanity check");
810 }
811
812 // resolve method
813 CallInfo info;
814 constantPoolHandle pool(current, last_frame.method()->constants());
815
816 methodHandle resolved_method;
817
818 int method_index = last_frame.get_index_u2(bytecode);
819 {
820 JvmtiHideSingleStepping jhss(current);
821 JavaThread* THREAD = current; // For exception macros.
822 LinkResolver::resolve_invoke(info, receiver, pool,
823 method_index, bytecode,
824 THREAD);
825
826 if (HAS_PENDING_EXCEPTION) {
827 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
828 // Preserve the original exception across the call to note_trap()
829 PreserveExceptionMark pm(current);
830 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
831 note_trap(current, Deoptimization::Reason_null_check);
832 }
833 return;
834 }
835
836 resolved_method = methodHandle(current, info.resolved_method());
837 } // end JvmtiHideSingleStepping
838
839 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
840 }
841
842 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
843 methodHandle& resolved_method,
844 constantPoolHandle& pool,
845 int method_index) {
846 // Don't allow safepoints until the method is cached.
847 NoSafepointVerifier nsv;
848
849 // check if link resolution caused cpCache to be updated
850 ConstantPoolCache* cache = pool->cache();
851 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
852
853 #ifdef ASSERT
854 if (bytecode == Bytecodes::_invokeinterface) {
855 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
856 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
857 // (see also CallInfo::set_interface for details)
858 assert(info.call_kind() == CallInfo::vtable_call ||
859 info.call_kind() == CallInfo::direct_call, "");
860 assert(resolved_method->is_final() || info.has_vtable_index(),
861 "should have been set already");
862 } else if (!resolved_method->has_itable_index()) {
863 // Resolved something like CharSequence.toString. Use vtable not itable.
864 assert(info.call_kind() != CallInfo::itable_call, "");
865 } else {
866 // Setup itable entry
867 assert(info.call_kind() == CallInfo::itable_call, "");
868 int index = resolved_method->itable_index();
869 assert(info.itable_index() == index, "");
870 }
871 } else if (bytecode == Bytecodes::_invokespecial) {
872 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
873 } else {
874 assert(info.call_kind() == CallInfo::direct_call ||
875 info.call_kind() == CallInfo::vtable_call, "");
876 }
877 #endif
878 // Get sender and only set cpCache entry to resolved if it is not an
879 // interface. The receiver for invokespecial calls within interface
880 // methods must be checked for every call.
881 InstanceKlass* sender = pool->pool_holder();
882
883 switch (info.call_kind()) {
884 case CallInfo::direct_call:
885 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
886 break;
887 case CallInfo::vtable_call:
888 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
889 break;
890 case CallInfo::itable_call:
891 cache->set_itable_call(
892 bytecode,
893 method_index,
894 info.resolved_klass(),
895 resolved_method,
896 info.itable_index());
897 break;
898 default: ShouldNotReachHere();
899 }
900 }
901
902 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
903 constantPoolHandle& pool, TRAPS) {
904 LinkInfo link_info(pool, method_index, bytecode, CHECK);
905
906 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
907 CallInfo call_info;
908 switch (bytecode) {
909 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
910 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
911 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
912
913 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
914 }
915 methodHandle resolved_method(THREAD, call_info.resolved_method());
916 guarantee(resolved_method->method_holder()->is_linked(), "");
917 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
918 } else {
919 // FIXME: why a shared class is not linked yet?
920 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
921 ResourceMark rm;
922 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
923 log_info(aot, resolve)("Not resolved: class not linked: %s %s %s",
924 resolved_iklass->is_shared() ? "is_shared" : "",
925 resolved_iklass->init_state_name(),
926 resolved_iklass->external_name());
927 }
928 }
929
930 // First time execution: Resolve symbols, create a permanent MethodType object.
931 void InterpreterRuntime::resolve_invokehandle(JavaThread* current) {
932 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
933 LastFrameAccessor last_frame(current);
934
935 // resolve method
936 CallInfo info;
937 constantPoolHandle pool(current, last_frame.method()->constants());
938 int method_index = last_frame.get_index_u2(bytecode);
939 {
940 JvmtiHideSingleStepping jhss(current);
941 JavaThread* THREAD = current; // For exception macros.
942 LinkResolver::resolve_invoke(info, Handle(), pool,
943 method_index, bytecode,
944 CHECK);
945 } // end JvmtiHideSingleStepping
946
947 pool->cache()->set_method_handle(method_index, info);
948 }
949
950 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
951 constantPoolHandle& pool, TRAPS) {
952 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
953 CallInfo info;
954 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
955
956 pool->cache()->set_method_handle(raw_index, info);
957 }
958
959 // First time execution: Resolve symbols, create a permanent CallSite object.
960 void InterpreterRuntime::resolve_invokedynamic(JavaThread* current) {
961 LastFrameAccessor last_frame(current);
962 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
963
964 // resolve method
965 CallInfo info;
966 constantPoolHandle pool(current, last_frame.method()->constants());
967 int index = last_frame.get_index_u4(bytecode);
968 {
969 JvmtiHideSingleStepping jhss(current);
970 JavaThread* THREAD = current; // For exception macros.
971 LinkResolver::resolve_invoke(info, Handle(), pool,
972 index, bytecode, CHECK);
973 } // end JvmtiHideSingleStepping
974
975 pool->cache()->set_dynamic_call(info, index);
976 }
977
978 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
979 constantPoolHandle& pool, TRAPS) {
980 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
981 CallInfo info;
982 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
983 pool->cache()->set_dynamic_call(info, raw_index);
984 }
985
986 // This function is the interface to the assembly code. It returns the resolved
987 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
988 // This function will check for redefinition!
989 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
990 switch (bytecode) {
991 case Bytecodes::_getstatic:
992 case Bytecodes::_putstatic:
993 case Bytecodes::_getfield:
994 case Bytecodes::_putfield:
995 resolve_get_put(current, bytecode);
996 break;
997 case Bytecodes::_invokevirtual:
998 case Bytecodes::_invokespecial:
999 case Bytecodes::_invokestatic:
1000 case Bytecodes::_invokeinterface:
1001 resolve_invoke(current, bytecode);
1002 break;
1003 case Bytecodes::_invokehandle:
1004 resolve_invokehandle(current);
1005 break;
1006 case Bytecodes::_invokedynamic:
1007 resolve_invokedynamic(current);
1008 break;
1009 default:
1010 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1011 break;
1012 }
1013 }
1014 JRT_END
1015
1016 //------------------------------------------------------------------------------------------------------------------------
1017 // Miscellaneous
1018
1019
1020 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1021 // Enable WXWrite: the function is called directly by interpreter.
1022 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1023
1024 // frequency_counter_overflow_inner can throw async exception.
1025 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1026 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1027 if (branch_bcp != nullptr && nm != nullptr) {
1028 // This was a successful request for an OSR nmethod. Because
1029 // frequency_counter_overflow_inner ends with a safepoint check,
1030 // nm could have been unloaded so look it up again. It's unsafe
1031 // to examine nm directly since it might have been freed and used
1032 // for something else.
1033 LastFrameAccessor last_frame(current);
1034 Method* method = last_frame.method();
1035 int bci = method->bci_from(last_frame.bcp());
1036 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1037 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1038 if (nm != nullptr) {
1039 // in case the transition passed a safepoint we need to barrier this again
1040 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1041 nm = nullptr;
1042 }
1043 }
1044 }
1045 if (nm != nullptr && current->is_interp_only_mode()) {
1046 // Normally we never get an nm if is_interp_only_mode() is true, because
1047 // policy()->event has a check for this and won't compile the method when
1048 // true. However, it's possible for is_interp_only_mode() to become true
1049 // during the compilation. We don't want to return the nm in that case
1050 // because we want to continue to execute interpreted.
1051 nm = nullptr;
1052 }
1053 #ifndef PRODUCT
1054 if (TraceOnStackReplacement) {
1055 if (nm != nullptr) {
1056 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1057 nm->print();
1058 }
1059 }
1060 #endif
1061 return nm;
1062 }
1063
1064 JRT_ENTRY(nmethod*,
1065 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1066 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1067 // flag, in case this method triggers classloading which will call into Java.
1068 UnlockFlagSaver fs(current);
1069
1070 LastFrameAccessor last_frame(current);
1071 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1072 methodHandle method(current, last_frame.method());
1073 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1074 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1075
1076 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1077
1078 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1079 if (osr_nm != nullptr) {
1080 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1081 osr_nm = nullptr;
1082 }
1083 }
1084 return osr_nm;
1085 JRT_END
1086
1087 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1088 assert(ProfileInterpreter, "must be profiling interpreter");
1089 int bci = method->bci_from(cur_bcp);
1090 MethodData* mdo = method->method_data();
1091 if (mdo == nullptr) return 0;
1092 return mdo->bci_to_di(bci);
1093 JRT_END
1094
1095 #ifdef ASSERT
1096 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1097 assert(ProfileInterpreter, "must be profiling interpreter");
1098
1099 MethodData* mdo = method->method_data();
1100 assert(mdo != nullptr, "must not be null");
1101
1102 int bci = method->bci_from(bcp);
1103
1104 address mdp2 = mdo->bci_to_dp(bci);
1105 if (mdp != mdp2) {
1106 ResourceMark rm;
1107 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1108 int current_di = mdo->dp_to_di(mdp);
1109 int expected_di = mdo->dp_to_di(mdp2);
1110 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1111 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1112 int approx_bci = -1;
1113 if (current_di >= 0) {
1114 approx_bci = mdo->data_at(current_di)->bci();
1115 }
1116 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1117 mdo->print_on(tty);
1118 method->print_codes();
1119 }
1120 assert(mdp == mdp2, "wrong mdp");
1121 JRT_END
1122 #endif // ASSERT
1123
1124 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1125 assert(ProfileInterpreter, "must be profiling interpreter");
1126 ResourceMark rm(current);
1127 LastFrameAccessor last_frame(current);
1128 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1129 MethodData* h_mdo = last_frame.method()->method_data();
1130
1131 // Grab a lock to ensure atomic access to setting the return bci and
1132 // the displacement. This can block and GC, invalidating all naked oops.
1133 MutexLocker ml(RetData_lock);
1134
1135 // ProfileData is essentially a wrapper around a derived oop, so we
1136 // need to take the lock before making any ProfileData structures.
1137 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1138 guarantee(data != nullptr, "profile data must be valid");
1139 RetData* rdata = data->as_RetData();
1140 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1141 last_frame.set_mdp(new_mdp);
1142 JRT_END
1143
1144 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1145 return Method::build_method_counters(current, m);
1146 JRT_END
1147
1148
1149 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current))
1150 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1151 // stack traversal automatically takes care of preserving arguments for invoke, so
1152 // this is no longer needed.
1153
1154 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1155 // if this is called during a safepoint
1156
1157 if (JvmtiExport::should_post_single_step()) {
1158 // This function is called by the interpreter when single stepping. Such single
1159 // stepping could unwind a frame. Then, it is important that we process any frames
1160 // that we might return into.
1161 StackWatermarkSet::before_unwind(current);
1162
1163 // We are called during regular safepoints and when the VM is
1164 // single stepping. If any thread is marked for single stepping,
1165 // then we may have JVMTI work to do.
1166 LastFrameAccessor last_frame(current);
1167 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1168 }
1169 JRT_END
1170
1171 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1172 assert(current == JavaThread::current(), "pre-condition");
1173 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
1174 // This function is called by the interpreter when the return poll found a reason
1175 // to call the VM. The reason could be that we are returning into a not yet safe
1176 // to access frame. We handle that below.
1177 // Note that this path does not check for single stepping, because we do not want
1178 // to single step when unwinding frames for an exception being thrown. Instead,
1179 // such single stepping code will use the safepoint table, which will use the
1180 // InterpreterRuntime::at_safepoint callback.
1181 StackWatermarkSet::before_unwind(current);
1182 JRT_END
1183
1184 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1185 ResolvedFieldEntry *entry))
1186
1187 // check the access_flags for the field in the klass
1188
1189 InstanceKlass* ik = entry->field_holder();
1190 int index = entry->field_index();
1191 if (!ik->field_status(index).is_access_watched()) return;
1192
1193 bool is_static = (obj == nullptr);
1194 HandleMark hm(current);
1195
1196 Handle h_obj;
1197 if (!is_static) {
1198 // non-static field accessors have an object, but we need a handle
1199 h_obj = Handle(current, obj);
1200 }
1201 InstanceKlass* field_holder = entry->field_holder(); // HERE
1202 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1203 LastFrameAccessor last_frame(current);
1204 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1205 JRT_END
1206
1207 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1208 ResolvedFieldEntry *entry, jvalue *value))
1209
1210 InstanceKlass* ik = entry->field_holder();
1211
1212 // check the access_flags for the field in the klass
1213 int index = entry->field_index();
1214 // bail out if field modifications are not watched
1215 if (!ik->field_status(index).is_modification_watched()) return;
1216
1217 char sig_type = '\0';
1218
1219 switch((TosState)entry->tos_state()) {
1220 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1221 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1222 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1223 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1224 case itos: sig_type = JVM_SIGNATURE_INT; break;
1225 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1226 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1227 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1228 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1229 default: ShouldNotReachHere(); return;
1230 }
1231 bool is_static = (obj == nullptr);
1232
1233 HandleMark hm(current);
1234 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1235 jvalue fvalue;
1236 #ifdef _LP64
1237 fvalue = *value;
1238 #else
1239 // Long/double values are stored unaligned and also noncontiguously with
1240 // tagged stacks. We can't just do a simple assignment even in the non-
1241 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1242 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1243 // We assume that the two halves of longs/doubles are stored in interpreter
1244 // stack slots in platform-endian order.
1245 jlong_accessor u;
1246 jint* newval = (jint*)value;
1247 u.words[0] = newval[0];
1248 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1249 fvalue.j = u.long_value;
1250 #endif // _LP64
1251
1252 Handle h_obj;
1253 if (!is_static) {
1254 // non-static field accessors have an object, but we need a handle
1255 h_obj = Handle(current, obj);
1256 }
1257
1258 LastFrameAccessor last_frame(current);
1259 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1260 fid, sig_type, &fvalue);
1261 JRT_END
1262
1263 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current))
1264 LastFrameAccessor last_frame(current);
1265 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1266 JRT_END
1267
1268
1269 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1270 // before transitioning to VM, and restore it after transitioning back
1271 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1272 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current))
1273 LastFrameAccessor last_frame(current);
1274 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1275 JRT_END
1276
1277 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1278 {
1279 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1280 }
1281 JRT_END
1282
1283
1284 // Implementation of SignatureHandlerLibrary
1285
1286 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1287 // Dummy definition (else normalization method is defined in CPU
1288 // dependent code)
1289 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1290 return fingerprint;
1291 }
1292 #endif
1293
1294 address SignatureHandlerLibrary::set_handler_blob() {
1295 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1296 if (handler_blob == nullptr) {
1297 return nullptr;
1298 }
1299 address handler = handler_blob->code_begin();
1300 _handler_blob = handler_blob;
1301 _handler = handler;
1302 return handler;
1303 }
1304
1305 void SignatureHandlerLibrary::initialize() {
1306 if (_fingerprints != nullptr) {
1307 return;
1308 }
1309 if (set_handler_blob() == nullptr) {
1310 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1311 }
1312
1313 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1314 SignatureHandlerLibrary::buffer_size);
1315 _buffer = bb->code_begin();
1316
1317 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1318 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1319 }
1320
1321 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1322 address handler = _handler;
1323 int insts_size = buffer->pure_insts_size();
1324 if (handler + insts_size > _handler_blob->code_end()) {
1325 // get a new handler blob
1326 handler = set_handler_blob();
1327 }
1328 if (handler != nullptr) {
1329 memcpy(handler, buffer->insts_begin(), insts_size);
1330 pd_set_handler(handler);
1331 ICache::invalidate_range(handler, insts_size);
1332 _handler = handler + insts_size;
1333 }
1334 return handler;
1335 }
1336
1337 void SignatureHandlerLibrary::add(const methodHandle& method) {
1338 if (method->signature_handler() == nullptr) {
1339 // use slow signature handler if we can't do better
1340 int handler_index = -1;
1341 // check if we can use customized (fast) signature handler
1342 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1343 // use customized signature handler
1344 MutexLocker mu(SignatureHandlerLibrary_lock);
1345 // make sure data structure is initialized
1346 initialize();
1347 // lookup method signature's fingerprint
1348 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1349 // allow CPU dependent code to optimize the fingerprints for the fast handler
1350 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1351 handler_index = _fingerprints->find(fingerprint);
1352 // create handler if necessary
1353 if (handler_index < 0) {
1354 ResourceMark rm;
1355 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1356 CodeBuffer buffer((address)(_buffer + align_offset),
1357 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1358 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1359 // copy into code heap
1360 address handler = set_handler(&buffer);
1361 if (handler == nullptr) {
1362 // use slow signature handler (without memorizing it in the fingerprints)
1363 } else {
1364 // debugging support
1365 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1366 ttyLocker ttyl;
1367 tty->cr();
1368 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1369 _handlers->length(),
1370 (method->is_static() ? "static" : "receiver"),
1371 method->name_and_sig_as_C_string(),
1372 fingerprint,
1373 buffer.insts_size());
1374 if (buffer.insts_size() > 0) {
1375 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1376 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1377 }
1378 #ifndef PRODUCT
1379 address rh_begin = Interpreter::result_handler(method()->result_type());
1380 if (CodeCache::contains(rh_begin)) {
1381 // else it might be special platform dependent values
1382 tty->print_cr(" --- associated result handler ---");
1383 address rh_end = rh_begin;
1384 while (*(int*)rh_end != 0) {
1385 rh_end += sizeof(int);
1386 }
1387 Disassembler::decode(rh_begin, rh_end);
1388 } else {
1389 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1390 }
1391 #endif
1392 }
1393 // add handler to library
1394 _fingerprints->append(fingerprint);
1395 _handlers->append(handler);
1396 // set handler index
1397 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1398 handler_index = _fingerprints->length() - 1;
1399 }
1400 }
1401 // Set handler under SignatureHandlerLibrary_lock
1402 if (handler_index < 0) {
1403 // use generic signature handler
1404 method->set_signature_handler(Interpreter::slow_signature_handler());
1405 } else {
1406 // set handler
1407 method->set_signature_handler(_handlers->at(handler_index));
1408 }
1409 } else {
1410 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1411 // use generic signature handler
1412 method->set_signature_handler(Interpreter::slow_signature_handler());
1413 }
1414 }
1415 #ifdef ASSERT
1416 int handler_index = -1;
1417 int fingerprint_index = -2;
1418 {
1419 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1420 // in any way if accessed from multiple threads. To avoid races with another
1421 // thread which may change the arrays in the above, mutex protected block, we
1422 // have to protect this read access here with the same mutex as well!
1423 MutexLocker mu(SignatureHandlerLibrary_lock);
1424 if (_handlers != nullptr) {
1425 handler_index = _handlers->find(method->signature_handler());
1426 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1427 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1428 fingerprint_index = _fingerprints->find(fingerprint);
1429 }
1430 }
1431 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1432 handler_index == fingerprint_index, "sanity check");
1433 #endif // ASSERT
1434 }
1435
1436 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1437 address SignatureHandlerLibrary::_handler = nullptr;
1438 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1439 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1440 address SignatureHandlerLibrary::_buffer = nullptr;
1441
1442
1443 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1444 methodHandle m(current, method);
1445 assert(m->is_native(), "sanity check");
1446 // lookup native function entry point if it doesn't exist
1447 if (!m->has_native_function()) {
1448 NativeLookup::lookup(m, CHECK);
1449 }
1450 // make sure signature handler is installed
1451 SignatureHandlerLibrary::add(m);
1452 // The interpreter entry point checks the signature handler first,
1453 // before trying to fetch the native entry point and klass mirror.
1454 // We must set the signature handler last, so that multiple processors
1455 // preparing the same method will be sure to see non-null entry & mirror.
1456 JRT_END
1457
1458 #if defined(IA32) || defined(AMD64) || defined(ARM)
1459 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1460 assert(current == JavaThread::current(), "pre-condition");
1461 if (src_address == dest_address) {
1462 return;
1463 }
1464 ResourceMark rm;
1465 LastFrameAccessor last_frame(current);
1466 assert(last_frame.is_interpreted_frame(), "");
1467 jint bci = last_frame.bci();
1468 methodHandle mh(current, last_frame.method());
1469 Bytecode_invoke invoke(mh, bci);
1470 ArgumentSizeComputer asc(invoke.signature());
1471 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1472 Copy::conjoint_jbytes(src_address, dest_address,
1473 size_of_arguments * Interpreter::stackElementSize);
1474 JRT_END
1475 #endif
1476
1477 #if INCLUDE_JVMTI
1478 // This is a support of the JVMTI PopFrame interface.
1479 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1480 // and return it as a vm_result_oop so that it can be reloaded in the list of invokestatic parameters.
1481 // The member_name argument is a saved reference (in local#0) to the member_name.
1482 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1483 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1484 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1485 Method* method, address bcp))
1486 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1487 if (code != Bytecodes::_invokestatic) {
1488 return;
1489 }
1490 ConstantPool* cpool = method->constants();
1491 int cp_index = Bytes::get_native_u2(bcp + 1);
1492 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1493 Symbol* mname = cpool->name_ref_at(cp_index, code);
1494
1495 if (MethodHandles::has_member_arg(cname, mname)) {
1496 oop member_name_oop = cast_to_oop(member_name);
1497 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1498 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1499 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1500 }
1501 current->set_vm_result_oop(member_name_oop);
1502 } else {
1503 current->set_vm_result_oop(nullptr);
1504 }
1505 JRT_END
1506 #endif // INCLUDE_JVMTI
1507
1508 #ifndef PRODUCT
1509 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1510 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1511 // The generated code still uses call_VM because that will set up the frame pointer for
1512 // bcp and method.
1513 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1514 assert(current == JavaThread::current(), "pre-condition");
1515 LastFrameAccessor last_frame(current);
1516 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1517 methodHandle mh(current, last_frame.method());
1518 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1519 return preserve_this_value;
1520 JRT_END
1521 #endif // !PRODUCT