1 /*
2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.inline.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/vmClasses.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "code/codeCache.hpp"
32 #include "compiler/compilationPolicy.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "compiler/disassembler.hpp"
35 #include "gc/shared/barrierSetNMethod.hpp"
36 #include "gc/shared/collectedHeap.hpp"
37 #include "interpreter/bytecodeTracer.hpp"
38 #include "interpreter/interpreter.hpp"
39 #include "interpreter/interpreterRuntime.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "interpreter/templateTable.hpp"
42 #include "jvm_io.h"
43 #include "logging/log.hpp"
44 #include "memory/oopFactory.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/constantPool.inline.hpp"
48 #include "oops/cpCache.inline.hpp"
49 #include "oops/flatArrayKlass.hpp"
50 #include "oops/flatArrayOop.inline.hpp"
51 #include "oops/inlineKlass.inline.hpp"
52 #include "oops/instanceKlass.inline.hpp"
53 #include "oops/klass.inline.hpp"
54 #include "oops/methodData.hpp"
55 #include "oops/method.inline.hpp"
56 #include "oops/objArrayKlass.hpp"
57 #include "oops/objArrayOop.inline.hpp"
58 #include "oops/oop.inline.hpp"
59 #include "oops/symbol.hpp"
60 #include "prims/jvmtiExport.hpp"
61 #include "prims/methodHandles.hpp"
62 #include "prims/nativeLookup.hpp"
63 #include "runtime/atomic.hpp"
64 #include "runtime/continuation.hpp"
65 #include "runtime/deoptimization.hpp"
66 #include "runtime/fieldDescriptor.inline.hpp"
67 #include "runtime/frame.inline.hpp"
68 #include "runtime/handles.inline.hpp"
69 #include "runtime/icache.hpp"
70 #include "runtime/interfaceSupport.inline.hpp"
71 #include "runtime/java.hpp"
72 #include "runtime/javaCalls.hpp"
73 #include "runtime/jfieldIDWorkaround.hpp"
74 #include "runtime/osThread.hpp"
75 #include "runtime/sharedRuntime.hpp"
76 #include "runtime/stackWatermarkSet.hpp"
77 #include "runtime/stubRoutines.hpp"
78 #include "runtime/synchronizer.inline.hpp"
79 #include "runtime/threadCritical.hpp"
80 #include "utilities/align.hpp"
81 #include "utilities/checkedCast.hpp"
82 #include "utilities/copy.hpp"
83 #include "utilities/events.hpp"
84 #include "utilities/globalDefinitions.hpp"
85 #ifdef COMPILER2
86 #include "opto/runtime.hpp"
87 #endif
88
89 // Helper class to access current interpreter state
90 class LastFrameAccessor : public StackObj {
91 frame _last_frame;
92 public:
93 LastFrameAccessor(JavaThread* current) {
94 assert(current == Thread::current(), "sanity");
95 _last_frame = current->last_frame();
96 }
97 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
98 Method* method() const { return _last_frame.interpreter_frame_method(); }
99 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
100 int bci() const { return _last_frame.interpreter_frame_bci(); }
101 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
102
103 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
104 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
105
106 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
107 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
108
109 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
110 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
111 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
112 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
113 int number_of_dimensions() const { return bcp()[3]; }
114
115 oop callee_receiver(Symbol* signature) {
116 return _last_frame.interpreter_callee_receiver(signature);
117 }
118 BasicObjectLock* monitor_begin() const {
119 return _last_frame.interpreter_frame_monitor_begin();
120 }
121 BasicObjectLock* monitor_end() const {
122 return _last_frame.interpreter_frame_monitor_end();
123 }
124 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
125 return _last_frame.next_monitor_in_interpreter_frame(current);
126 }
127
128 frame& get_frame() { return _last_frame; }
129 };
130
131 //------------------------------------------------------------------------------------------------------------------------
132 // State accessors
133
134 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
135 LastFrameAccessor last_frame(current);
136 last_frame.set_bcp(bcp);
137 if (ProfileInterpreter) {
138 // ProfileTraps uses MDOs independently of ProfileInterpreter.
139 // That is why we must check both ProfileInterpreter and mdo != nullptr.
140 MethodData* mdo = last_frame.method()->method_data();
141 if (mdo != nullptr) {
142 NEEDS_CLEANUP;
143 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
144 }
145 }
146 }
147
148 //------------------------------------------------------------------------------------------------------------------------
149 // Constants
150
151
152 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
153 // access constant pool
154 LastFrameAccessor last_frame(current);
155 ConstantPool* pool = last_frame.method()->constants();
156 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
157 constantTag tag = pool->tag_at(cp_index);
158
159 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
160 Klass* klass = pool->klass_at(cp_index, CHECK);
161 oop java_class = klass->java_mirror();
162 current->set_vm_result(java_class);
163 JRT_END
164
165 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
166 assert(bytecode == Bytecodes::_ldc ||
167 bytecode == Bytecodes::_ldc_w ||
168 bytecode == Bytecodes::_ldc2_w ||
169 bytecode == Bytecodes::_fast_aldc ||
170 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
171 ResourceMark rm(current);
172 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
173 bytecode == Bytecodes::_fast_aldc_w);
174 LastFrameAccessor last_frame(current);
175 methodHandle m (current, last_frame.method());
176 Bytecode_loadconstant ldc(m, last_frame.bci());
177
178 // Double-check the size. (Condy can have any type.)
179 BasicType type = ldc.result_type();
180 switch (type2size[type]) {
181 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
182 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
183 default: ShouldNotReachHere();
184 }
185
186 // Resolve the constant. This does not do unboxing.
187 // But it does replace Universe::the_null_sentinel by null.
188 oop result = ldc.resolve_constant(CHECK);
189 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
190
191 #ifdef ASSERT
192 {
193 // The bytecode wrappers aren't GC-safe so construct a new one
194 Bytecode_loadconstant ldc2(m, last_frame.bci());
195 int rindex = ldc2.cache_index();
196 if (rindex < 0)
197 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
198 if (rindex >= 0) {
199 oop coop = m->constants()->resolved_reference_at(rindex);
200 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
201 assert(roop == coop, "expected result for assembly code");
202 }
203 }
204 #endif
205 current->set_vm_result(result);
206 if (!is_fast_aldc) {
207 // Tell the interpreter how to unbox the primitive.
208 guarantee(java_lang_boxing_object::is_instance(result, type), "");
209 int offset = java_lang_boxing_object::value_offset(type);
210 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
211 | (offset & ConstantPoolCache::field_index_mask));
212 current->set_vm_result_2((Metadata*)flags);
213 }
214 }
215 JRT_END
216
217
218 //------------------------------------------------------------------------------------------------------------------------
219 // Allocation
220
221 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
222 Klass* k = pool->klass_at(index, CHECK);
223 InstanceKlass* klass = InstanceKlass::cast(k);
224
225 // Make sure we are not instantiating an abstract klass
226 klass->check_valid_for_instantiation(true, CHECK);
227
228 // Make sure klass is initialized
229 klass->initialize(CHECK);
230
231 oop obj = klass->allocate_instance(CHECK);
232 current->set_vm_result(obj);
233 JRT_END
234
235 JRT_ENTRY(void, InterpreterRuntime::uninitialized_static_inline_type_field(JavaThread* current, oopDesc* mirror, ResolvedFieldEntry* entry))
236 // The interpreter tries to access an inline static field that has not been initialized.
237 // This situation can happen in different scenarios:
238 // 1 - if the load or initialization of the field failed during step 8 of
239 // the initialization of the holder of the field, in this case the access to the field
240 // must fail
241 // 2 - it can also happen when the initialization of the holder class triggered the initialization of
242 // another class which accesses this field in its static initializer, in this case the
243 // access must succeed to allow circularity
244 // The code below tries to load and initialize the field's class again before returning the default value.
245 // If the field was not initialized because of an error, an exception should be thrown.
246 // If the class is being initialized, the default value is returned.
247 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
248 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
249 InstanceKlass* klass = entry->field_holder();
250 u2 index = entry->field_index();
251 assert(klass == java_lang_Class::as_Klass(mirror), "Not the field holder klass");
252 assert(klass->field_is_null_free_inline_type(index), "Sanity check");
253 if (klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD)) {
254 int offset = klass->field_offset(index);
255 Klass* field_k = klass->get_inline_type_field_klass_or_null(index);
256 if (field_k == nullptr) {
257 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index)->fundamental_name(THREAD),
258 Handle(THREAD, klass->class_loader()),
259 Handle(THREAD, klass->protection_domain()),
260 true, CHECK);
261 assert(field_k != nullptr, "Should have been loaded or an exception thrown above");
262 if (!field_k->is_inline_klass()) {
263 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
264 err_msg("class %s expects class %s to be a concrete value class but it is not",
265 klass->name()->as_C_string(), field_k->external_name()));
266 }
267 InlineLayoutInfo* li = klass->inline_layout_info_adr(index);
268 li->set_klass(InlineKlass::cast(field_k));
269 li->set_kind(LayoutKind::REFERENCE);
270 }
271 field_k->initialize(CHECK);
272 oop defaultvalue = InlineKlass::cast(field_k)->default_value();
273 // It is safe to initialize the static field because 1) the current thread is the initializing thread
274 // and is the only one that can access it, and 2) the field is actually not initialized (i.e. null)
275 // otherwise the JVM should not be executing this code.
276 mirror_h()->obj_field_put(offset, defaultvalue);
277 current->set_vm_result(defaultvalue);
278 } else {
279 assert(klass->is_in_error_state(), "If not initializing, initialization must have failed to get there");
280 ResourceMark rm(THREAD);
281 const char* desc = "Could not initialize class ";
282 const char* className = klass->external_name();
283 size_t msglen = strlen(desc) + strlen(className) + 1;
284 char* message = NEW_RESOURCE_ARRAY(char, msglen);
285 if (nullptr == message) {
286 // Out of memory: can't create detailed error message
287 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className);
288 } else {
289 jio_snprintf(message, msglen, "%s%s", desc, className);
290 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message);
291 }
292 }
293 JRT_END
294
295 JRT_ENTRY(void, InterpreterRuntime::read_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
296 assert(oopDesc::is_oop(obj), "Sanity check");
297 Handle obj_h(THREAD, obj);
298
299 InstanceKlass* holder = InstanceKlass::cast(entry->field_holder());
300 assert(entry->field_holder()->field_is_flat(entry->field_index()), "Sanity check");
301
302 InlineLayoutInfo* layout_info = holder->inline_layout_info_adr(entry->field_index());
303 InlineKlass* field_vklass = layout_info->klass();
304
305 oop res = field_vklass->read_flat_field(obj_h(), entry->field_offset(), layout_info->kind(), CHECK);
306 current->set_vm_result(res);
307 JRT_END
308
309 JRT_ENTRY(void, InterpreterRuntime::read_nullable_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
310 assert(oopDesc::is_oop(obj), "Sanity check");
311 assert(entry->has_null_marker(), "Otherwise should not get there");
312 Handle obj_h(THREAD, obj);
313
314 InstanceKlass* holder = entry->field_holder();
315 int field_index = entry->field_index();
316 InlineLayoutInfo* li= holder->inline_layout_info_adr(field_index);
317
318 int nm_offset = li->null_marker_offset();
319 if (obj_h()->byte_field_acquire(nm_offset) == 0) {
320 current->set_vm_result(nullptr);
321 } else {
322 InlineKlass* field_vklass = InlineKlass::cast(li->klass());
323 oop res = field_vklass->read_flat_field(obj_h(), entry->field_offset(), LayoutKind::NULLABLE_ATOMIC_FLAT, CHECK);
324 current->set_vm_result(res);
325 }
326 JRT_END
327
328 JRT_ENTRY(void, InterpreterRuntime::write_nullable_flat_field(JavaThread* current, oopDesc* obj, oopDesc* value, ResolvedFieldEntry* entry))
329 assert(oopDesc::is_oop(obj), "Sanity check");
330 Handle obj_h(THREAD, obj);
331 assert(value == nullptr || oopDesc::is_oop(value), "Sanity check");
332 Handle val_h(THREAD, value);
333
334 InstanceKlass* holder = entry->field_holder();
335 InlineLayoutInfo* li = holder->inline_layout_info_adr(entry->field_index());
336 InlineKlass* vk = li->klass();
337 assert(li->kind() == LayoutKind::NULLABLE_ATOMIC_FLAT, "Must be");
338 int nm_offset = li->null_marker_offset();
339
340 if (val_h() == nullptr) {
341 if(li->klass()->nonstatic_oop_count() == 0) {
342 // No embedded oops, just reset the null marker
343 obj_h()->byte_field_put(nm_offset, (jbyte)0);
344 } else {
345 // Has embedded oops, using the reset value to rewrite all fields to null/zeros
346 assert(li->klass()->null_reset_value()->byte_field(vk->null_marker_offset()) == 0, "reset value must always have a null marker set to 0");
347 vk->inline_copy_oop_to_payload(vk->null_reset_value(), ((char*)(oopDesc*)obj_h()) + entry->field_offset(), li->kind());
348 }
349 return;
350 }
351
352 assert(val_h()->klass() == vk, "Must match because flat fields are monomorphic");
353 // The interpreter copies values with a bulk operation
354 // To avoid accidentally setting the null marker to "null" during
355 // the copying, the null marker is set to non zero in the source object
356 if (val_h()->byte_field(vk->null_marker_offset()) == 0) {
357 val_h()->byte_field_put(vk->null_marker_offset(), (jbyte)1);
358 }
359 vk->inline_copy_oop_to_payload(val_h(), ((char*)(oopDesc*)obj_h()) + entry->field_offset(), li->kind());
360 JRT_END
361
362 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
363 oop obj = oopFactory::new_typeArray(type, size, CHECK);
364 current->set_vm_result(obj);
365 JRT_END
366
367
368 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
369 Klass* klass = pool->klass_at(index, CHECK);
370 arrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
371 current->set_vm_result(obj);
372 JRT_END
373
374 JRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* current, arrayOopDesc* array, int index))
375 flatArrayHandle vah(current, (flatArrayOop)array);
376 oop value_holder = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK);
377 current->set_vm_result(value_holder);
378 JRT_END
379
380 JRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* current, void* val, arrayOopDesc* array, int index))
381 assert(val != nullptr, "can't store null into flat array");
382 ((flatArrayOop)array)->value_copy_to_index(cast_to_oop(val), index, LayoutKind::PAYLOAD); // Non atomic is the only layout currently supported by flat arrays
383 JRT_END
384
385 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
386 // We may want to pass in more arguments - could make this slightly faster
387 LastFrameAccessor last_frame(current);
388 ConstantPool* constants = last_frame.method()->constants();
389 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
390 Klass* klass = constants->klass_at(i, CHECK);
391 int nof_dims = last_frame.number_of_dimensions();
392 assert(klass->is_klass(), "not a class");
393 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
394
395 // We must create an array of jints to pass to multi_allocate.
396 ResourceMark rm(current);
397 const int small_dims = 10;
398 jint dim_array[small_dims];
399 jint *dims = &dim_array[0];
400 if (nof_dims > small_dims) {
401 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
402 }
403 for (int index = 0; index < nof_dims; index++) {
404 // offset from first_size_address is addressed as local[index]
405 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
406 dims[index] = first_size_address[n];
407 }
408 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
409 current->set_vm_result(obj);
410 JRT_END
411
412
413 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
414 assert(oopDesc::is_oop(obj), "must be a valid oop");
415 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
416 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
417 JRT_END
418
419 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
420 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
421
422 Handle ha(THREAD, aobj);
423 Handle hb(THREAD, bobj);
424 JavaValue result(T_BOOLEAN);
425 JavaCallArguments args;
426 args.push_oop(ha);
427 args.push_oop(hb);
428 methodHandle method(current, Universe::is_substitutable_method());
429 method->method_holder()->initialize(CHECK_false); // Ensure class ValueObjectMethods is initialized
430 JavaCalls::call(&result, method, &args, THREAD);
431 if (HAS_PENDING_EXCEPTION) {
432 // Something really bad happened because isSubstitutable() should not throw exceptions
433 // If it is an error, just let it propagate
434 // If it is an exception, wrap it into an InternalError
435 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
436 Handle e(THREAD, PENDING_EXCEPTION);
437 CLEAR_PENDING_EXCEPTION;
438 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
439 }
440 }
441 return result.get_jboolean();
442 JRT_END
443
444 // Quicken instance-of and check-cast bytecodes
445 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
446 // Force resolving; quicken the bytecode
447 LastFrameAccessor last_frame(current);
448 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
449 ConstantPool* cpool = last_frame.method()->constants();
450 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
451 // program we might have seen an unquick'd bytecode in the interpreter but have another
452 // thread quicken the bytecode before we get here.
453 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
454 Klass* klass = cpool->klass_at(which, CHECK);
455 current->set_vm_result_2(klass);
456 JRT_END
457
458
459 //------------------------------------------------------------------------------------------------------------------------
460 // Exceptions
461
462 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
463 const methodHandle& trap_method, int trap_bci) {
464 if (trap_method.not_null()) {
465 MethodData* trap_mdo = trap_method->method_data();
466 if (trap_mdo == nullptr) {
467 ExceptionMark em(current);
468 JavaThread* THREAD = current; // For exception macros.
469 Method::build_profiling_method_data(trap_method, THREAD);
470 if (HAS_PENDING_EXCEPTION) {
471 // Only metaspace OOM is expected. No Java code executed.
472 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
473 "we expect only an OOM error here");
474 CLEAR_PENDING_EXCEPTION;
475 }
476 trap_mdo = trap_method->method_data();
477 // and fall through...
478 }
479 if (trap_mdo != nullptr) {
480 // Update per-method count of trap events. The interpreter
481 // is updating the MDO to simulate the effect of compiler traps.
482 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
483 }
484 }
485 }
486
487 // Assume the compiler is (or will be) interested in this event.
488 // If necessary, create an MDO to hold the information, and record it.
489 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
490 assert(ProfileTraps, "call me only if profiling");
491 LastFrameAccessor last_frame(current);
492 methodHandle trap_method(current, last_frame.method());
493 int trap_bci = trap_method->bci_from(last_frame.bcp());
494 note_trap_inner(current, reason, trap_method, trap_bci);
495 }
496
497 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
498 // get klass
499 InstanceKlass* klass = InstanceKlass::cast(k);
500 assert(klass->is_initialized(),
501 "this klass should have been initialized during VM initialization");
502 // create instance - do not call constructor since we may have no
503 // (java) stack space left (should assert constructor is empty)
504 Handle exception;
505 oop exception_oop = klass->allocate_instance(CHECK_(exception));
506 exception = Handle(THREAD, exception_oop);
507 if (StackTraceInThrowable) {
508 java_lang_Throwable::fill_in_stack_trace(exception);
509 }
510 return exception;
511 }
512
513 // Special handling for stack overflow: since we don't have any (java) stack
514 // space left we use the pre-allocated & pre-initialized StackOverflowError
515 // klass to create an stack overflow error instance. We do not call its
516 // constructor for the same reason (it is empty, anyway).
517 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
518 Handle exception = get_preinitialized_exception(
519 vmClasses::StackOverflowError_klass(),
520 CHECK);
521 // Increment counter for hs_err file reporting
522 Atomic::inc(&Exceptions::_stack_overflow_errors);
523 // Remove the ScopedValue bindings in case we got a StackOverflowError
524 // while we were trying to manipulate ScopedValue bindings.
525 current->clear_scopedValueBindings();
526 THROW_HANDLE(exception);
527 JRT_END
528
529 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
530 Handle exception = get_preinitialized_exception(
531 vmClasses::StackOverflowError_klass(),
532 CHECK);
533 java_lang_Throwable::set_message(exception(),
534 Universe::delayed_stack_overflow_error_message());
535 // Increment counter for hs_err file reporting
536 Atomic::inc(&Exceptions::_stack_overflow_errors);
537 // Remove the ScopedValue bindings in case we got a StackOverflowError
538 // while we were trying to manipulate ScopedValue bindings.
539 current->clear_scopedValueBindings();
540 THROW_HANDLE(exception);
541 JRT_END
542
543 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
544 // lookup exception klass
545 TempNewSymbol s = SymbolTable::new_symbol(name);
546 if (ProfileTraps) {
547 if (s == vmSymbols::java_lang_ArithmeticException()) {
548 note_trap(current, Deoptimization::Reason_div0_check);
549 } else if (s == vmSymbols::java_lang_NullPointerException()) {
550 note_trap(current, Deoptimization::Reason_null_check);
551 }
552 }
553 // create exception
554 Handle exception = Exceptions::new_exception(current, s, message);
555 current->set_vm_result(exception());
556 JRT_END
557
558
559 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
560 // Produce the error message first because note_trap can safepoint
561 ResourceMark rm(current);
562 const char* klass_name = obj->klass()->external_name();
563 // lookup exception klass
564 TempNewSymbol s = SymbolTable::new_symbol(name);
565 if (ProfileTraps) {
566 if (s == vmSymbols::java_lang_ArrayStoreException()) {
567 note_trap(current, Deoptimization::Reason_array_check);
568 } else {
569 note_trap(current, Deoptimization::Reason_class_check);
570 }
571 }
572 // create exception, with klass name as detail message
573 Handle exception = Exceptions::new_exception(current, s, klass_name);
574 current->set_vm_result(exception());
575 JRT_END
576
577 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
578 // Produce the error message first because note_trap can safepoint
579 ResourceMark rm(current);
580 stringStream ss;
581 ss.print("Index %d out of bounds for length %d", index, a->length());
582
583 if (ProfileTraps) {
584 note_trap(current, Deoptimization::Reason_range_check);
585 }
586
587 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
588 JRT_END
589
590 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
591 JavaThread* current, oopDesc* obj))
592
593 // Produce the error message first because note_trap can safepoint
594 ResourceMark rm(current);
595 char* message = SharedRuntime::generate_class_cast_message(
596 current, obj->klass());
597
598 if (ProfileTraps) {
599 note_trap(current, Deoptimization::Reason_class_check);
600 }
601
602 // create exception
603 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
604 JRT_END
605
606 // exception_handler_for_exception(...) returns the continuation address,
607 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
608 // The exception oop is returned to make sure it is preserved over GC (it
609 // is only on the stack if the exception was thrown explicitly via athrow).
610 // During this operation, the expression stack contains the values for the
611 // bci where the exception happened. If the exception was propagated back
612 // from a call, the expression stack contains the values for the bci at the
613 // invoke w/o arguments (i.e., as if one were inside the call).
614 // Note that the implementation of this method assumes it's only called when an exception has actually occured
615 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
616 // We get here after we have unwound from a callee throwing an exception
617 // into the interpreter. Any deferred stack processing is notified of
618 // the event via the StackWatermarkSet.
619 StackWatermarkSet::after_unwind(current);
620
621 LastFrameAccessor last_frame(current);
622 Handle h_exception(current, exception);
623 methodHandle h_method (current, last_frame.method());
624 constantPoolHandle h_constants(current, h_method->constants());
625 bool should_repeat;
626 int handler_bci;
627 int current_bci = last_frame.bci();
628
629 if (current->frames_to_pop_failed_realloc() > 0) {
630 // Allocation of scalar replaced object used in this frame
631 // failed. Unconditionally pop the frame.
632 current->dec_frames_to_pop_failed_realloc();
633 current->set_vm_result(h_exception());
634 // If the method is synchronized we already unlocked the monitor
635 // during deoptimization so the interpreter needs to skip it when
636 // the frame is popped.
637 current->set_do_not_unlock_if_synchronized(true);
638 return Interpreter::remove_activation_entry();
639 }
640
641 // Need to do this check first since when _do_not_unlock_if_synchronized
642 // is set, we don't want to trigger any classloading which may make calls
643 // into java, or surprisingly find a matching exception handler for bci 0
644 // since at this moment the method hasn't been "officially" entered yet.
645 if (current->do_not_unlock_if_synchronized()) {
646 ResourceMark rm;
647 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
648 current->set_vm_result(exception);
649 return Interpreter::remove_activation_entry();
650 }
651
652 do {
653 should_repeat = false;
654
655 // assertions
656 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
657 // Check that exception is a subclass of Throwable.
658 assert(h_exception->is_a(vmClasses::Throwable_klass()),
659 "Exception not subclass of Throwable");
660
661 // tracing
662 if (log_is_enabled(Info, exceptions)) {
663 ResourceMark rm(current);
664 stringStream tempst;
665 tempst.print("interpreter method <%s>\n"
666 " at bci %d for thread " INTPTR_FORMAT " (%s)",
667 h_method->print_value_string(), current_bci, p2i(current), current->name());
668 Exceptions::log_exception(h_exception, tempst.as_string());
669 }
670 // Don't go paging in something which won't be used.
671 // else if (extable->length() == 0) {
672 // // disabled for now - interpreter is not using shortcut yet
673 // // (shortcut is not to call runtime if we have no exception handlers)
674 // // warning("performance bug: should not call runtime if method has no exception handlers");
675 // }
676 // for AbortVMOnException flag
677 Exceptions::debug_check_abort(h_exception);
678
679 // exception handler lookup
680 Klass* klass = h_exception->klass();
681 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
682 if (HAS_PENDING_EXCEPTION) {
683 // We threw an exception while trying to find the exception handler.
684 // Transfer the new exception to the exception handle which will
685 // be set into thread local storage, and do another lookup for an
686 // exception handler for this exception, this time starting at the
687 // BCI of the exception handler which caused the exception to be
688 // thrown (bug 4307310).
689 h_exception = Handle(THREAD, PENDING_EXCEPTION);
690 CLEAR_PENDING_EXCEPTION;
691 if (handler_bci >= 0) {
692 current_bci = handler_bci;
693 should_repeat = true;
694 }
695 }
696 } while (should_repeat == true);
697
698 #if INCLUDE_JVMCI
699 if (EnableJVMCI && h_method->method_data() != nullptr) {
700 ResourceMark rm(current);
701 MethodData* mdo = h_method->method_data();
702
703 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
704 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
705
706 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
707 if (pdata != nullptr && pdata->is_BitData()) {
708 BitData* bit_data = (BitData*) pdata;
709 bit_data->set_exception_seen();
710 }
711 }
712 #endif
713
714 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
715 // time throw or a stack unwinding throw and accordingly notify the debugger
716 if (JvmtiExport::can_post_on_exceptions()) {
717 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
718 }
719
720 address continuation = nullptr;
721 address handler_pc = nullptr;
722 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
723 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
724 // handler in this method, or (b) after a stack overflow there is not yet
725 // enough stack space available to reprotect the stack.
726 continuation = Interpreter::remove_activation_entry();
727 #if COMPILER2_OR_JVMCI
728 // Count this for compilation purposes
729 h_method->interpreter_throwout_increment(THREAD);
730 #endif
731 } else {
732 // handler in this method => change bci/bcp to handler bci/bcp and continue there
733 handler_pc = h_method->code_base() + handler_bci;
734 h_method->set_exception_handler_entered(handler_bci); // profiling
735 #ifndef ZERO
736 set_bcp_and_mdp(handler_pc, current);
737 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
738 #else
739 continuation = (address)(intptr_t) handler_bci;
740 #endif
741 }
742
743 // notify debugger of an exception catch
744 // (this is good for exceptions caught in native methods as well)
745 if (JvmtiExport::can_post_on_exceptions()) {
746 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
747 }
748
749 current->set_vm_result(h_exception());
750 return continuation;
751 JRT_END
752
753
754 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current))
755 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
756 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
757 JRT_END
758
759
760 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
761 THROW(vmSymbols::java_lang_AbstractMethodError());
762 JRT_END
763
764 // This method is called from the "abstract_entry" of the interpreter.
765 // At that point, the arguments have already been removed from the stack
766 // and therefore we don't have the receiver object at our fingertips. (Though,
767 // on some platforms the receiver still resides in a register...). Thus,
768 // we have no choice but print an error message not containing the receiver
769 // type.
770 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
771 Method* missingMethod))
772 ResourceMark rm(current);
773 assert(missingMethod != nullptr, "sanity");
774 methodHandle m(current, missingMethod);
775 LinkResolver::throw_abstract_method_error(m, THREAD);
776 JRT_END
777
778 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
779 Klass* recvKlass,
780 Method* missingMethod))
781 ResourceMark rm(current);
782 methodHandle mh = methodHandle(current, missingMethod);
783 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
784 JRT_END
785
786 JRT_ENTRY(void, InterpreterRuntime::throw_InstantiationError(JavaThread* current))
787 THROW(vmSymbols::java_lang_InstantiationError());
788 JRT_END
789
790
791 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
792 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
793 JRT_END
794
795 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
796 Klass* recvKlass,
797 Klass* interfaceKlass))
798 ResourceMark rm(current);
799 char buf[1000];
800 buf[0] = '\0';
801 jio_snprintf(buf, sizeof(buf),
802 "Class %s does not implement the requested interface %s",
803 recvKlass ? recvKlass->external_name() : "nullptr",
804 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
805 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
806 JRT_END
807
808 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
809 THROW(vmSymbols::java_lang_NullPointerException());
810 JRT_END
811
812 //------------------------------------------------------------------------------------------------------------------------
813 // Fields
814 //
815
816 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
817 LastFrameAccessor last_frame(current);
818 constantPoolHandle pool(current, last_frame.method()->constants());
819 methodHandle m(current, last_frame.method());
820
821 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current);
822 }
823
824 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
825 methodHandle& m,
826 constantPoolHandle& pool,
827 bool initialize_holder, TRAPS) {
828 fieldDescriptor info;
829 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
830 bytecode == Bytecodes::_putstatic);
831 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
832
833 {
834 JvmtiHideSingleStepping jhss(THREAD);
835 LinkResolver::resolve_field_access(info, pool, field_index,
836 m, bytecode, initialize_holder, CHECK);
837 } // end JvmtiHideSingleStepping
838
839 // check if link resolution caused cpCache to be updated
840 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
841
842 // compute auxiliary field attributes
843 TosState state = as_TosState(info.field_type());
844
845 // Resolution of put instructions on final fields is delayed. That is required so that
846 // exceptions are thrown at the correct place (when the instruction is actually invoked).
847 // If we do not resolve an instruction in the current pass, leaving the put_code
848 // set to zero will cause the next put instruction to the same field to reresolve.
849
850 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
851 // to final instance fields with updates originating from a method different than <init>)
852 // is inhibited. A putfield instruction targeting an instance final field must throw
853 // an IllegalAccessError if the instruction is not in an instance
854 // initializer method <init>. If resolution were not inhibited, a putfield
855 // in an initializer method could be resolved in the initializer. Subsequent
856 // putfield instructions to the same field would then use cached information.
857 // As a result, those instructions would not pass through the VM. That is,
858 // checks in resolve_field_access() would not be executed for those instructions
859 // and the required IllegalAccessError would not be thrown.
860 //
861 // Also, we need to delay resolving getstatic and putstatic instructions until the
862 // class is initialized. This is required so that access to the static
863 // field will call the initialization function every time until the class
864 // is completely initialized ala. in 2.17.5 in JVM Specification.
865 InstanceKlass* klass = info.field_holder();
866 bool uninitialized_static = is_static && !klass->is_initialized();
867 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
868 info.has_initialized_final_update();
869 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
870
871 Bytecodes::Code get_code = (Bytecodes::Code)0;
872 Bytecodes::Code put_code = (Bytecodes::Code)0;
873 if (!uninitialized_static) {
874 if (is_static) {
875 get_code = Bytecodes::_getstatic;
876 } else {
877 get_code = Bytecodes::_getfield;
878 }
879 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
880 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
881 }
882 }
883
884 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
885 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile(),
886 info.is_flat(), info.is_null_free_inline_type(),
887 info.has_null_marker());
888
889 entry->fill_in(info.field_holder(), info.offset(),
890 checked_cast<u2>(info.index()), checked_cast<u1>(state),
891 static_cast<u1>(get_code), static_cast<u1>(put_code));
892 }
893
894
895 //------------------------------------------------------------------------------------------------------------------------
896 // Synchronization
897 //
898 // The interpreter's synchronization code is factored out so that it can
899 // be shared by method invocation and synchronized blocks.
900 //%note synchronization_3
901
902 //%note monitor_1
903 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
904 #ifdef ASSERT
905 current->last_frame().interpreter_frame_verify_monitor(elem);
906 #endif
907 Handle h_obj(current, elem->obj());
908 assert(Universe::heap()->is_in_or_null(h_obj()),
909 "must be null or an object");
910 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
911 assert(Universe::heap()->is_in_or_null(elem->obj()),
912 "must be null or an object");
913 #ifdef ASSERT
914 current->last_frame().interpreter_frame_verify_monitor(elem);
915 #endif
916 JRT_END
917
918 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
919 oop obj = elem->obj();
920 assert(Universe::heap()->is_in(obj), "must be an object");
921 // The object could become unlocked through a JNI call, which we have no other checks for.
922 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
923 if (obj->is_unlocked()) {
924 if (CheckJNICalls) {
925 fatal("Object has been unlocked by JNI");
926 }
927 return;
928 }
929 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
930 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
931 // again at method exit or in the case of an exception.
932 elem->set_obj(nullptr);
933 JRT_END
934
935 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
936 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
937 JRT_END
938
939 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
940 // Returns an illegal exception to install into the current thread. The
941 // pending_exception flag is cleared so normal exception handling does not
942 // trigger. Any current installed exception will be overwritten. This
943 // method will be called during an exception unwind.
944
945 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
946 Handle exception(current, current->vm_result());
947 assert(exception() != nullptr, "vm result should be set");
948 current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
949 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
950 current->set_vm_result(exception());
951 JRT_END
952
953 JRT_ENTRY(void, InterpreterRuntime::throw_identity_exception(JavaThread* current, oopDesc* obj))
954 Klass* klass = cast_to_oop(obj)->klass();
955 ResourceMark rm(THREAD);
956 const char* desc = "Cannot synchronize on an instance of value class ";
957 const char* className = klass->external_name();
958 size_t msglen = strlen(desc) + strlen(className) + 1;
959 char* message = NEW_RESOURCE_ARRAY(char, msglen);
960 if (nullptr == message) {
961 // Out of memory: can't create detailed error message
962 THROW_MSG(vmSymbols::java_lang_IdentityException(), className);
963 } else {
964 jio_snprintf(message, msglen, "%s%s", desc, className);
965 THROW_MSG(vmSymbols::java_lang_IdentityException(), message);
966 }
967 JRT_END
968
969 //------------------------------------------------------------------------------------------------------------------------
970 // Invokes
971
972 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
973 return method->orig_bytecode_at(method->bci_from(bcp));
974 JRT_END
975
976 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
977 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
978 JRT_END
979
980 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
981 JvmtiExport::post_raw_breakpoint(current, method, bcp);
982 JRT_END
983
984 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
985 LastFrameAccessor last_frame(current);
986 // extract receiver from the outgoing argument list if necessary
987 Handle receiver(current, nullptr);
988 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
989 bytecode == Bytecodes::_invokespecial) {
990 ResourceMark rm(current);
991 methodHandle m (current, last_frame.method());
992 Bytecode_invoke call(m, last_frame.bci());
993 Symbol* signature = call.signature();
994 receiver = Handle(current, last_frame.callee_receiver(signature));
995
996 assert(Universe::heap()->is_in_or_null(receiver()),
997 "sanity check");
998 assert(receiver.is_null() ||
999 !Universe::heap()->is_in(receiver->klass()),
1000 "sanity check");
1001 }
1002
1003 // resolve method
1004 CallInfo info;
1005 constantPoolHandle pool(current, last_frame.method()->constants());
1006
1007 methodHandle resolved_method;
1008
1009 int method_index = last_frame.get_index_u2(bytecode);
1010 {
1011 JvmtiHideSingleStepping jhss(current);
1012 JavaThread* THREAD = current; // For exception macros.
1013 LinkResolver::resolve_invoke(info, receiver, pool,
1014 method_index, bytecode,
1015 THREAD);
1016
1017 if (HAS_PENDING_EXCEPTION) {
1018 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
1019 // Preserve the original exception across the call to note_trap()
1020 PreserveExceptionMark pm(current);
1021 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
1022 note_trap(current, Deoptimization::Reason_null_check);
1023 }
1024 return;
1025 }
1026
1027 resolved_method = methodHandle(current, info.resolved_method());
1028 } // end JvmtiHideSingleStepping
1029
1030 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
1031 }
1032
1033 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
1034 methodHandle& resolved_method,
1035 constantPoolHandle& pool,
1036 int method_index) {
1037 // Don't allow safepoints until the method is cached.
1038 NoSafepointVerifier nsv;
1039
1040 // check if link resolution caused cpCache to be updated
1041 ConstantPoolCache* cache = pool->cache();
1042 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
1043
1044 #ifdef ASSERT
1045 if (bytecode == Bytecodes::_invokeinterface) {
1046 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
1047 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1048 // (see also CallInfo::set_interface for details)
1049 assert(info.call_kind() == CallInfo::vtable_call ||
1050 info.call_kind() == CallInfo::direct_call, "");
1051 assert(resolved_method->is_final() || info.has_vtable_index(),
1052 "should have been set already");
1053 } else if (!resolved_method->has_itable_index()) {
1054 // Resolved something like CharSequence.toString. Use vtable not itable.
1055 assert(info.call_kind() != CallInfo::itable_call, "");
1056 } else {
1057 // Setup itable entry
1058 assert(info.call_kind() == CallInfo::itable_call, "");
1059 int index = resolved_method->itable_index();
1060 assert(info.itable_index() == index, "");
1061 }
1062 } else if (bytecode == Bytecodes::_invokespecial) {
1063 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1064 } else {
1065 assert(info.call_kind() == CallInfo::direct_call ||
1066 info.call_kind() == CallInfo::vtable_call, "");
1067 }
1068 #endif
1069 // Get sender and only set cpCache entry to resolved if it is not an
1070 // interface. The receiver for invokespecial calls within interface
1071 // methods must be checked for every call.
1072 InstanceKlass* sender = pool->pool_holder();
1073
1074 switch (info.call_kind()) {
1075 case CallInfo::direct_call:
1076 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
1077 break;
1078 case CallInfo::vtable_call:
1079 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
1080 break;
1081 case CallInfo::itable_call:
1082 cache->set_itable_call(
1083 bytecode,
1084 method_index,
1085 info.resolved_klass(),
1086 resolved_method,
1087 info.itable_index());
1088 break;
1089 default: ShouldNotReachHere();
1090 }
1091 }
1092
1093 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
1094 constantPoolHandle& pool, TRAPS) {
1095 LinkInfo link_info(pool, method_index, bytecode, CHECK);
1096
1097 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
1098 CallInfo call_info;
1099 switch (bytecode) {
1100 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
1101 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
1102 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
1103
1104 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
1105 }
1106 methodHandle resolved_method(THREAD, call_info.resolved_method());
1107 guarantee(resolved_method->method_holder()->is_linked(), "");
1108 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1109 } else {
1110 // FIXME: why a shared class is not linked yet?
1111 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1112 ResourceMark rm;
1113 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1114 log_info(cds, resolve)("Not resolved: class not linked: %s %s %s",
1115 resolved_iklass->is_shared() ? "is_shared" : "",
1116 resolved_iklass->init_state_name(),
1117 resolved_iklass->external_name());
1118 }
1119 }
1120
1121 // First time execution: Resolve symbols, create a permanent MethodType object.
1122 void InterpreterRuntime::resolve_invokehandle(JavaThread* current) {
1123 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1124 LastFrameAccessor last_frame(current);
1125
1126 // resolve method
1127 CallInfo info;
1128 constantPoolHandle pool(current, last_frame.method()->constants());
1129 int method_index = last_frame.get_index_u2(bytecode);
1130 {
1131 JvmtiHideSingleStepping jhss(current);
1132 JavaThread* THREAD = current; // For exception macros.
1133 LinkResolver::resolve_invoke(info, Handle(), pool,
1134 method_index, bytecode,
1135 CHECK);
1136 } // end JvmtiHideSingleStepping
1137
1138 pool->cache()->set_method_handle(method_index, info);
1139 }
1140
1141 // First time execution: Resolve symbols, create a permanent CallSite object.
1142 void InterpreterRuntime::resolve_invokedynamic(JavaThread* current) {
1143 LastFrameAccessor last_frame(current);
1144 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1145
1146 // resolve method
1147 CallInfo info;
1148 constantPoolHandle pool(current, last_frame.method()->constants());
1149 int index = last_frame.get_index_u4(bytecode);
1150 {
1151 JvmtiHideSingleStepping jhss(current);
1152 JavaThread* THREAD = current; // For exception macros.
1153 LinkResolver::resolve_invoke(info, Handle(), pool,
1154 index, bytecode, CHECK);
1155 } // end JvmtiHideSingleStepping
1156
1157 pool->cache()->set_dynamic_call(info, index);
1158 }
1159
1160 // This function is the interface to the assembly code. It returns the resolved
1161 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1162 // This function will check for redefinition!
1163 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1164 switch (bytecode) {
1165 case Bytecodes::_getstatic:
1166 case Bytecodes::_putstatic:
1167 case Bytecodes::_getfield:
1168 case Bytecodes::_putfield:
1169 resolve_get_put(current, bytecode);
1170 break;
1171 case Bytecodes::_invokevirtual:
1172 case Bytecodes::_invokespecial:
1173 case Bytecodes::_invokestatic:
1174 case Bytecodes::_invokeinterface:
1175 resolve_invoke(current, bytecode);
1176 break;
1177 case Bytecodes::_invokehandle:
1178 resolve_invokehandle(current);
1179 break;
1180 case Bytecodes::_invokedynamic:
1181 resolve_invokedynamic(current);
1182 break;
1183 default:
1184 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1185 break;
1186 }
1187 }
1188 JRT_END
1189
1190 //------------------------------------------------------------------------------------------------------------------------
1191 // Miscellaneous
1192
1193
1194 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1195 // Enable WXWrite: the function is called directly by interpreter.
1196 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1197
1198 // frequency_counter_overflow_inner can throw async exception.
1199 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1200 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1201 if (branch_bcp != nullptr && nm != nullptr) {
1202 // This was a successful request for an OSR nmethod. Because
1203 // frequency_counter_overflow_inner ends with a safepoint check,
1204 // nm could have been unloaded so look it up again. It's unsafe
1205 // to examine nm directly since it might have been freed and used
1206 // for something else.
1207 LastFrameAccessor last_frame(current);
1208 Method* method = last_frame.method();
1209 int bci = method->bci_from(last_frame.bcp());
1210 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1211 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1212 if (nm != nullptr && bs_nm != nullptr) {
1213 // in case the transition passed a safepoint we need to barrier this again
1214 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1215 nm = nullptr;
1216 }
1217 }
1218 }
1219 if (nm != nullptr && current->is_interp_only_mode()) {
1220 // Normally we never get an nm if is_interp_only_mode() is true, because
1221 // policy()->event has a check for this and won't compile the method when
1222 // true. However, it's possible for is_interp_only_mode() to become true
1223 // during the compilation. We don't want to return the nm in that case
1224 // because we want to continue to execute interpreted.
1225 nm = nullptr;
1226 }
1227 #ifndef PRODUCT
1228 if (TraceOnStackReplacement) {
1229 if (nm != nullptr) {
1230 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1231 nm->print();
1232 }
1233 }
1234 #endif
1235 return nm;
1236 }
1237
1238 JRT_ENTRY(nmethod*,
1239 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1240 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1241 // flag, in case this method triggers classloading which will call into Java.
1242 UnlockFlagSaver fs(current);
1243
1244 LastFrameAccessor last_frame(current);
1245 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1246 methodHandle method(current, last_frame.method());
1247 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1248 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1249
1250 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1251
1252 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1253 if (osr_nm != nullptr && bs_nm != nullptr) {
1254 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1255 osr_nm = nullptr;
1256 }
1257 }
1258 return osr_nm;
1259 JRT_END
1260
1261 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1262 assert(ProfileInterpreter, "must be profiling interpreter");
1263 int bci = method->bci_from(cur_bcp);
1264 MethodData* mdo = method->method_data();
1265 if (mdo == nullptr) return 0;
1266 return mdo->bci_to_di(bci);
1267 JRT_END
1268
1269 #ifdef ASSERT
1270 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1271 assert(ProfileInterpreter, "must be profiling interpreter");
1272
1273 MethodData* mdo = method->method_data();
1274 assert(mdo != nullptr, "must not be null");
1275
1276 int bci = method->bci_from(bcp);
1277
1278 address mdp2 = mdo->bci_to_dp(bci);
1279 if (mdp != mdp2) {
1280 ResourceMark rm;
1281 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1282 int current_di = mdo->dp_to_di(mdp);
1283 int expected_di = mdo->dp_to_di(mdp2);
1284 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1285 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1286 int approx_bci = -1;
1287 if (current_di >= 0) {
1288 approx_bci = mdo->data_at(current_di)->bci();
1289 }
1290 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1291 mdo->print_on(tty);
1292 method->print_codes();
1293 }
1294 assert(mdp == mdp2, "wrong mdp");
1295 JRT_END
1296 #endif // ASSERT
1297
1298 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1299 assert(ProfileInterpreter, "must be profiling interpreter");
1300 ResourceMark rm(current);
1301 LastFrameAccessor last_frame(current);
1302 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1303 MethodData* h_mdo = last_frame.method()->method_data();
1304
1305 // Grab a lock to ensure atomic access to setting the return bci and
1306 // the displacement. This can block and GC, invalidating all naked oops.
1307 MutexLocker ml(RetData_lock);
1308
1309 // ProfileData is essentially a wrapper around a derived oop, so we
1310 // need to take the lock before making any ProfileData structures.
1311 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1312 guarantee(data != nullptr, "profile data must be valid");
1313 RetData* rdata = data->as_RetData();
1314 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1315 last_frame.set_mdp(new_mdp);
1316 JRT_END
1317
1318 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1319 return Method::build_method_counters(current, m);
1320 JRT_END
1321
1322
1323 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current))
1324 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1325 // stack traversal automatically takes care of preserving arguments for invoke, so
1326 // this is no longer needed.
1327
1328 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1329 // if this is called during a safepoint
1330
1331 if (JvmtiExport::should_post_single_step()) {
1332 // This function is called by the interpreter when single stepping. Such single
1333 // stepping could unwind a frame. Then, it is important that we process any frames
1334 // that we might return into.
1335 StackWatermarkSet::before_unwind(current);
1336
1337 // We are called during regular safepoints and when the VM is
1338 // single stepping. If any thread is marked for single stepping,
1339 // then we may have JVMTI work to do.
1340 LastFrameAccessor last_frame(current);
1341 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1342 }
1343 JRT_END
1344
1345 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1346 assert(current == JavaThread::current(), "pre-condition");
1347 // This function is called by the interpreter when the return poll found a reason
1348 // to call the VM. The reason could be that we are returning into a not yet safe
1349 // to access frame. We handle that below.
1350 // Note that this path does not check for single stepping, because we do not want
1351 // to single step when unwinding frames for an exception being thrown. Instead,
1352 // such single stepping code will use the safepoint table, which will use the
1353 // InterpreterRuntime::at_safepoint callback.
1354 StackWatermarkSet::before_unwind(current);
1355 JRT_END
1356
1357 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1358 ResolvedFieldEntry *entry))
1359
1360 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1361 // check the access_flags for the field in the klass
1362
1363 InstanceKlass* ik = entry->field_holder();
1364 int index = entry->field_index();
1365 if (!ik->field_status(index).is_access_watched()) return;
1366
1367 bool is_static = (obj == nullptr);
1368 bool is_flat = entry->is_flat();
1369 HandleMark hm(current);
1370
1371 Handle h_obj;
1372 if (!is_static) {
1373 // non-static field accessors have an object, but we need a handle
1374 h_obj = Handle(current, obj);
1375 }
1376 InstanceKlass* field_holder = entry->field_holder(); // HERE
1377 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static, is_flat);
1378 LastFrameAccessor last_frame(current);
1379 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1380 JRT_END
1381
1382 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1383 ResolvedFieldEntry *entry, jvalue *value))
1384
1385 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1386 InstanceKlass* ik = entry->field_holder();
1387
1388 // check the access_flags for the field in the klass
1389 int index = entry->field_index();
1390 // bail out if field modifications are not watched
1391 if (!ik->field_status(index).is_modification_watched()) return;
1392
1393 char sig_type = '\0';
1394
1395 switch((TosState)entry->tos_state()) {
1396 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1397 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1398 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1399 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1400 case itos: sig_type = JVM_SIGNATURE_INT; break;
1401 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1402 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1403 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1404 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1405 default: ShouldNotReachHere(); return;
1406 }
1407
1408 bool is_static = (obj == nullptr);
1409 bool is_flat = entry->is_flat();
1410
1411 HandleMark hm(current);
1412 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static, is_flat);
1413 jvalue fvalue;
1414 #ifdef _LP64
1415 fvalue = *value;
1416 #else
1417 // Long/double values are stored unaligned and also noncontiguously with
1418 // tagged stacks. We can't just do a simple assignment even in the non-
1419 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1420 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1421 // We assume that the two halves of longs/doubles are stored in interpreter
1422 // stack slots in platform-endian order.
1423 jlong_accessor u;
1424 jint* newval = (jint*)value;
1425 u.words[0] = newval[0];
1426 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1427 fvalue.j = u.long_value;
1428 #endif // _LP64
1429
1430 Handle h_obj;
1431 if (!is_static) {
1432 // non-static field accessors have an object, but we need a handle
1433 h_obj = Handle(current, obj);
1434 }
1435
1436 LastFrameAccessor last_frame(current);
1437 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1438 fid, sig_type, &fvalue);
1439 JRT_END
1440
1441 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current))
1442 LastFrameAccessor last_frame(current);
1443 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1444 JRT_END
1445
1446
1447 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1448 // before transitioning to VM, and restore it after transitioning back
1449 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1450 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current))
1451 LastFrameAccessor last_frame(current);
1452 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1453 JRT_END
1454
1455 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1456 {
1457 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1458 }
1459 JRT_END
1460
1461
1462 // Implementation of SignatureHandlerLibrary
1463
1464 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1465 // Dummy definition (else normalization method is defined in CPU
1466 // dependent code)
1467 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1468 return fingerprint;
1469 }
1470 #endif
1471
1472 address SignatureHandlerLibrary::set_handler_blob() {
1473 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1474 if (handler_blob == nullptr) {
1475 return nullptr;
1476 }
1477 address handler = handler_blob->code_begin();
1478 _handler_blob = handler_blob;
1479 _handler = handler;
1480 return handler;
1481 }
1482
1483 void SignatureHandlerLibrary::initialize() {
1484 if (_fingerprints != nullptr) {
1485 return;
1486 }
1487 if (set_handler_blob() == nullptr) {
1488 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1489 }
1490
1491 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1492 SignatureHandlerLibrary::buffer_size);
1493 _buffer = bb->code_begin();
1494
1495 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1496 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1497 }
1498
1499 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1500 address handler = _handler;
1501 int insts_size = buffer->pure_insts_size();
1502 if (handler + insts_size > _handler_blob->code_end()) {
1503 // get a new handler blob
1504 handler = set_handler_blob();
1505 }
1506 if (handler != nullptr) {
1507 memcpy(handler, buffer->insts_begin(), insts_size);
1508 pd_set_handler(handler);
1509 ICache::invalidate_range(handler, insts_size);
1510 _handler = handler + insts_size;
1511 }
1512 return handler;
1513 }
1514
1515 void SignatureHandlerLibrary::add(const methodHandle& method) {
1516 if (method->signature_handler() == nullptr) {
1517 // use slow signature handler if we can't do better
1518 int handler_index = -1;
1519 // check if we can use customized (fast) signature handler
1520 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1521 // use customized signature handler
1522 MutexLocker mu(SignatureHandlerLibrary_lock);
1523 // make sure data structure is initialized
1524 initialize();
1525 // lookup method signature's fingerprint
1526 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1527 // allow CPU dependent code to optimize the fingerprints for the fast handler
1528 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1529 handler_index = _fingerprints->find(fingerprint);
1530 // create handler if necessary
1531 if (handler_index < 0) {
1532 ResourceMark rm;
1533 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1534 CodeBuffer buffer((address)(_buffer + align_offset),
1535 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1536 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1537 // copy into code heap
1538 address handler = set_handler(&buffer);
1539 if (handler == nullptr) {
1540 // use slow signature handler (without memorizing it in the fingerprints)
1541 } else {
1542 // debugging support
1543 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1544 ttyLocker ttyl;
1545 tty->cr();
1546 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1547 _handlers->length(),
1548 (method->is_static() ? "static" : "receiver"),
1549 method->name_and_sig_as_C_string(),
1550 fingerprint,
1551 buffer.insts_size());
1552 if (buffer.insts_size() > 0) {
1553 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1554 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1555 }
1556 #ifndef PRODUCT
1557 address rh_begin = Interpreter::result_handler(method()->result_type());
1558 if (CodeCache::contains(rh_begin)) {
1559 // else it might be special platform dependent values
1560 tty->print_cr(" --- associated result handler ---");
1561 address rh_end = rh_begin;
1562 while (*(int*)rh_end != 0) {
1563 rh_end += sizeof(int);
1564 }
1565 Disassembler::decode(rh_begin, rh_end);
1566 } else {
1567 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1568 }
1569 #endif
1570 }
1571 // add handler to library
1572 _fingerprints->append(fingerprint);
1573 _handlers->append(handler);
1574 // set handler index
1575 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1576 handler_index = _fingerprints->length() - 1;
1577 }
1578 }
1579 // Set handler under SignatureHandlerLibrary_lock
1580 if (handler_index < 0) {
1581 // use generic signature handler
1582 method->set_signature_handler(Interpreter::slow_signature_handler());
1583 } else {
1584 // set handler
1585 method->set_signature_handler(_handlers->at(handler_index));
1586 }
1587 } else {
1588 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1589 // use generic signature handler
1590 method->set_signature_handler(Interpreter::slow_signature_handler());
1591 }
1592 }
1593 #ifdef ASSERT
1594 int handler_index = -1;
1595 int fingerprint_index = -2;
1596 {
1597 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1598 // in any way if accessed from multiple threads. To avoid races with another
1599 // thread which may change the arrays in the above, mutex protected block, we
1600 // have to protect this read access here with the same mutex as well!
1601 MutexLocker mu(SignatureHandlerLibrary_lock);
1602 if (_handlers != nullptr) {
1603 handler_index = _handlers->find(method->signature_handler());
1604 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1605 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1606 fingerprint_index = _fingerprints->find(fingerprint);
1607 }
1608 }
1609 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1610 handler_index == fingerprint_index, "sanity check");
1611 #endif // ASSERT
1612 }
1613
1614 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1615 int handler_index = -1;
1616 // use customized signature handler
1617 MutexLocker mu(SignatureHandlerLibrary_lock);
1618 // make sure data structure is initialized
1619 initialize();
1620 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1621 handler_index = _fingerprints->find(fingerprint);
1622 // create handler if necessary
1623 if (handler_index < 0) {
1624 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1625 tty->cr();
1626 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1627 _handlers->length(),
1628 p2i(handler),
1629 fingerprint);
1630 }
1631 _fingerprints->append(fingerprint);
1632 _handlers->append(handler);
1633 } else {
1634 if (PrintSignatureHandlers) {
1635 tty->cr();
1636 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1637 _handlers->length(),
1638 fingerprint,
1639 p2i(_handlers->at(handler_index)),
1640 p2i(handler));
1641 }
1642 }
1643 }
1644
1645
1646 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1647 address SignatureHandlerLibrary::_handler = nullptr;
1648 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1649 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1650 address SignatureHandlerLibrary::_buffer = nullptr;
1651
1652
1653 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1654 methodHandle m(current, method);
1655 assert(m->is_native(), "sanity check");
1656 // lookup native function entry point if it doesn't exist
1657 if (!m->has_native_function()) {
1658 NativeLookup::lookup(m, CHECK);
1659 }
1660 // make sure signature handler is installed
1661 SignatureHandlerLibrary::add(m);
1662 // The interpreter entry point checks the signature handler first,
1663 // before trying to fetch the native entry point and klass mirror.
1664 // We must set the signature handler last, so that multiple processors
1665 // preparing the same method will be sure to see non-null entry & mirror.
1666 JRT_END
1667
1668 #if defined(IA32) || defined(AMD64) || defined(ARM)
1669 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1670 assert(current == JavaThread::current(), "pre-condition");
1671 if (src_address == dest_address) {
1672 return;
1673 }
1674 ResourceMark rm;
1675 LastFrameAccessor last_frame(current);
1676 assert(last_frame.is_interpreted_frame(), "");
1677 jint bci = last_frame.bci();
1678 methodHandle mh(current, last_frame.method());
1679 Bytecode_invoke invoke(mh, bci);
1680 ArgumentSizeComputer asc(invoke.signature());
1681 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1682 Copy::conjoint_jbytes(src_address, dest_address,
1683 size_of_arguments * Interpreter::stackElementSize);
1684 JRT_END
1685 #endif
1686
1687 #if INCLUDE_JVMTI
1688 // This is a support of the JVMTI PopFrame interface.
1689 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1690 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1691 // The member_name argument is a saved reference (in local#0) to the member_name.
1692 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1693 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1694 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1695 Method* method, address bcp))
1696 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1697 if (code != Bytecodes::_invokestatic) {
1698 return;
1699 }
1700 ConstantPool* cpool = method->constants();
1701 int cp_index = Bytes::get_native_u2(bcp + 1);
1702 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1703 Symbol* mname = cpool->name_ref_at(cp_index, code);
1704
1705 if (MethodHandles::has_member_arg(cname, mname)) {
1706 oop member_name_oop = cast_to_oop(member_name);
1707 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1708 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1709 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1710 }
1711 current->set_vm_result(member_name_oop);
1712 } else {
1713 current->set_vm_result(nullptr);
1714 }
1715 JRT_END
1716 #endif // INCLUDE_JVMTI
1717
1718 #ifndef PRODUCT
1719 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1720 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1721 // The generated code still uses call_VM because that will set up the frame pointer for
1722 // bcp and method.
1723 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1724 assert(current == JavaThread::current(), "pre-condition");
1725 LastFrameAccessor last_frame(current);
1726 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1727 methodHandle mh(current, last_frame.method());
1728 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1729 return preserve_this_value;
1730 JRT_END
1731 #endif // !PRODUCT