1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "classfile/vmSymbols.hpp"
27 #include "code/nmethod.hpp"
28 #include "compiler/compilationPolicy.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "interpreter/linkResolver.hpp"
32 #include "memory/universe.hpp"
33 #include "oops/method.inline.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "prims/jniCheck.hpp"
36 #include "prims/jvmtiExport.hpp"
37 #include "runtime/handles.inline.hpp"
38 #include "runtime/interfaceSupport.inline.hpp"
39 #include "runtime/javaCalls.hpp"
40 #include "runtime/javaThread.hpp"
41 #include "runtime/jniHandles.inline.hpp"
42 #include "runtime/mutexLocker.hpp"
43 #include "runtime/os.inline.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/signature.hpp"
46 #include "runtime/stubRoutines.hpp"
47 #include "runtime/thread.inline.hpp"
48 #if INCLUDE_JVMCI
49 #include "jvmci/jvmciJavaClasses.hpp"
50 #endif
51
52 // -----------------------------------------------------
120
121 if (_thread->has_pending_exception() && _thread->has_last_Java_frame()) {
122 // If we get here, the Java code threw an exception that unwound a frame.
123 // It could be that the new frame anchor has not passed through the required
124 // StackWatermark barriers. Therefore, we process any such deferred unwind
125 // requests here.
126 StackWatermarkSet::after_unwind(_thread);
127 }
128 }
129
130
131 void JavaCallWrapper::oops_do(OopClosure* f) {
132 f->do_oop((oop*)&_receiver);
133 handles()->oops_do(f);
134 }
135
136
137 // Helper methods
138 static BasicType runtime_type_from(JavaValue* result) {
139 switch (result->get_type()) {
140 case T_BOOLEAN: // fall through
141 case T_CHAR : // fall through
142 case T_SHORT : // fall through
143 case T_INT : // fall through
144 #ifndef _LP64
145 case T_OBJECT : // fall through
146 case T_ARRAY : // fall through
147 #endif
148 case T_BYTE : // fall through
149 case T_VOID : return T_INT;
150 case T_LONG : return T_LONG;
151 case T_FLOAT : return T_FLOAT;
152 case T_DOUBLE : return T_DOUBLE;
153 #ifdef _LP64
154 case T_ARRAY : // fall through
155 case T_OBJECT: return T_OBJECT;
156 #endif
157 default:
158 ShouldNotReachHere();
159 return T_ILLEGAL;
160 }
161 }
162
163 // ============ Virtual calls ============
164
165 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
166 CallInfo callinfo;
167 Handle receiver = args->receiver();
168 Klass* recvrKlass = receiver.is_null() ? (Klass*)nullptr : receiver->klass();
169 LinkInfo link_info(spec_klass, name, signature);
170 LinkResolver::resolve_virtual_call(
171 callinfo, receiver, recvrKlass, link_info, true, CHECK);
172 methodHandle method(THREAD, callinfo.selected_method());
173 assert(method.not_null(), "should have thrown exception");
174
175 // Invoke the method
356 // Find receiver
357 Handle receiver = (!method->is_static()) ? args->receiver() : Handle();
358
359 // When we reenter Java, we need to re-enable the reserved/yellow zone which
360 // might already be disabled when we are in VM.
361 thread->stack_overflow_state()->reguard_stack_if_needed();
362
363 // Check that there are shadow pages available before changing thread state
364 // to Java. Calculate current_stack_pointer here to make sure
365 // stack_shadow_pages_available() and map_stack_shadow_pages() use the same sp.
366 address sp = os::current_stack_pointer();
367 if (!os::stack_shadow_pages_available(THREAD, method, sp)) {
368 // Throw stack overflow exception with preinitialized exception.
369 Exceptions::throw_stack_overflow_exception(THREAD, __FILE__, __LINE__, method);
370 return;
371 } else {
372 // Touch pages checked if the OS needs them to be touched to be mapped.
373 os::map_stack_shadow_pages(sp);
374 }
375
376 // do call
377 { JavaCallWrapper link(method, receiver, result, CHECK);
378 { HandleMark hm(thread); // HandleMark used by HandleMarkCleaner
379
380 // NOTE: if we move the computation of the result_val_address inside
381 // the call to call_stub, the optimizer produces wrong code.
382 intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());
383 intptr_t* parameter_address = args->parameters();
384
385 address entry_point;
386 {
387 // The enter_interp_only_mode use handshake to set interp_only mode
388 // so no safepoint should be allowed between is_interp_only_mode() and call
389 NoSafepointVerifier nsv;
390 if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) {
391 entry_point = method->interpreter_entry();
392 } else {
393 // Since the call stub sets up like the interpreter we call the from_interpreted_entry
394 // so we can go compiled via a i2c.
395 entry_point = method->from_interpreted_entry();
396 #if INCLUDE_JVMCI
397 // Gets the alternative target (if any) that should be called
398 Handle alternative_target = args->alternative_target();
399 if (!alternative_target.is_null()) {
400 // Must extract verified entry point from HotSpotNmethod after VM to Java
401 // transition in JavaCallWrapper constructor so that it is safe with
402 // respect to nmethod sweeping.
403 address verified_entry_point = (address) HotSpotJVMCI::InstalledCode::entryPoint(nullptr, alternative_target());
404 if (verified_entry_point != nullptr) {
405 thread->set_jvmci_alternate_call_target(verified_entry_point);
406 entry_point = method->get_i2c_entry();
407 }
408 }
409 #endif
410 }
423 CHECK
424 );
425 }
426
427 result = link.result(); // circumvent MS C++ 5.0 compiler bug (result is clobbered across call)
428 // Preserve oop return value across possible gc points
429 if (oop_result_flag) {
430 thread->set_vm_result_oop(result->get_oop());
431 }
432 }
433 } // Exit JavaCallWrapper (can block - potential return oop must be preserved)
434
435 // Check if a thread stop or suspend should be executed
436 // The following assert was not realistic. Thread.stop can set that bit at any moment.
437 //assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed");
438
439 // Restore possible oop return
440 if (oop_result_flag) {
441 result->set_oop(thread->vm_result_oop());
442 thread->set_vm_result_oop(nullptr);
443 }
444 }
445
446
447 //--------------------------------------------------------------------------------------
448 // Implementation of JavaCallArguments
449
450 inline bool is_value_state_indirect_oop(uint state) {
451 assert(state != JavaCallArguments::value_state_oop,
452 "Checking for handles after removal");
453 assert(state < JavaCallArguments::value_state_limit,
454 "Invalid value state %u", state);
455 return state != JavaCallArguments::value_state_primitive;
456 }
457
458 inline oop resolve_indirect_oop(intptr_t value, uint state) {
459 switch (state) {
460 case JavaCallArguments::value_state_handle:
461 {
462 oop* ptr = reinterpret_cast<oop*>(value);
571 case T_INT:
572 case T_FLOAT: // this one also
573 check_single_word(); break;
574 case T_LONG:
575 case T_DOUBLE:
576 check_double_word(); break;
577 case T_ARRAY:
578 case T_OBJECT:
579 check_reference(); break;
580 default:
581 ShouldNotReachHere();
582 }
583 }
584 };
585
586
587 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) {
588 guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");
589
590 // Treat T_OBJECT and T_ARRAY as the same
591 if (is_reference_type(return_type)) return_type = T_OBJECT;
592
593 // Check that oop information is correct
594 Symbol* signature = method->signature();
595
596 SignatureChekker sc(signature,
597 return_type,
598 method->is_static(),
599 _value_state,
600 _value);
601 }
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1 /*
2 * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "classfile/vmSymbols.hpp"
27 #include "code/nmethod.hpp"
28 #include "compiler/compilationPolicy.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "interpreter/linkResolver.hpp"
32 #include "memory/universe.hpp"
33 #include "oops/inlineKlass.hpp"
34 #include "oops/method.inline.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "prims/jniCheck.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "runtime/handles.inline.hpp"
39 #include "runtime/interfaceSupport.inline.hpp"
40 #include "runtime/javaCalls.hpp"
41 #include "runtime/javaThread.hpp"
42 #include "runtime/jniHandles.inline.hpp"
43 #include "runtime/mutexLocker.hpp"
44 #include "runtime/os.inline.hpp"
45 #include "runtime/sharedRuntime.hpp"
46 #include "runtime/signature.hpp"
47 #include "runtime/stubRoutines.hpp"
48 #include "runtime/thread.inline.hpp"
49 #if INCLUDE_JVMCI
50 #include "jvmci/jvmciJavaClasses.hpp"
51 #endif
52
53 // -----------------------------------------------------
121
122 if (_thread->has_pending_exception() && _thread->has_last_Java_frame()) {
123 // If we get here, the Java code threw an exception that unwound a frame.
124 // It could be that the new frame anchor has not passed through the required
125 // StackWatermark barriers. Therefore, we process any such deferred unwind
126 // requests here.
127 StackWatermarkSet::after_unwind(_thread);
128 }
129 }
130
131
132 void JavaCallWrapper::oops_do(OopClosure* f) {
133 f->do_oop((oop*)&_receiver);
134 handles()->oops_do(f);
135 }
136
137
138 // Helper methods
139 static BasicType runtime_type_from(JavaValue* result) {
140 switch (result->get_type()) {
141 case T_BOOLEAN : // fall through
142 case T_CHAR : // fall through
143 case T_SHORT : // fall through
144 case T_INT : // fall through
145 #ifndef _LP64
146 case T_OBJECT : // fall through
147 case T_ARRAY : // fall through
148 case T_FLAT_ELEMENT: // fall through
149 #endif
150 case T_BYTE : // fall through
151 case T_VOID : return T_INT;
152 case T_LONG : return T_LONG;
153 case T_FLOAT : return T_FLOAT;
154 case T_DOUBLE : return T_DOUBLE;
155 #ifdef _LP64
156 case T_ARRAY : // fall through
157 case T_OBJECT : return T_OBJECT;
158 #endif
159 default:
160 ShouldNotReachHere();
161 return T_ILLEGAL;
162 }
163 }
164
165 // ============ Virtual calls ============
166
167 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
168 CallInfo callinfo;
169 Handle receiver = args->receiver();
170 Klass* recvrKlass = receiver.is_null() ? (Klass*)nullptr : receiver->klass();
171 LinkInfo link_info(spec_klass, name, signature);
172 LinkResolver::resolve_virtual_call(
173 callinfo, receiver, recvrKlass, link_info, true, CHECK);
174 methodHandle method(THREAD, callinfo.selected_method());
175 assert(method.not_null(), "should have thrown exception");
176
177 // Invoke the method
358 // Find receiver
359 Handle receiver = (!method->is_static()) ? args->receiver() : Handle();
360
361 // When we reenter Java, we need to re-enable the reserved/yellow zone which
362 // might already be disabled when we are in VM.
363 thread->stack_overflow_state()->reguard_stack_if_needed();
364
365 // Check that there are shadow pages available before changing thread state
366 // to Java. Calculate current_stack_pointer here to make sure
367 // stack_shadow_pages_available() and map_stack_shadow_pages() use the same sp.
368 address sp = os::current_stack_pointer();
369 if (!os::stack_shadow_pages_available(THREAD, method, sp)) {
370 // Throw stack overflow exception with preinitialized exception.
371 Exceptions::throw_stack_overflow_exception(THREAD, __FILE__, __LINE__, method);
372 return;
373 } else {
374 // Touch pages checked if the OS needs them to be touched to be mapped.
375 os::map_stack_shadow_pages(sp);
376 }
377
378 jobject value_buffer = nullptr;
379 if (InlineTypeReturnedAsFields && (result->get_type() == T_OBJECT)) {
380 // Pre allocate a buffered inline type in case the result is returned
381 // flattened by compiled code
382 InlineKlass* vk = method->returns_inline_type();
383 if (vk != nullptr && vk->can_be_returned_as_fields()) {
384 oop instance = vk->allocate_instance(CHECK);
385 value_buffer = JNIHandles::make_local(thread, instance);
386 result->set_jobject(value_buffer);
387 }
388 }
389
390 // do call
391 { JavaCallWrapper link(method, receiver, result, CHECK);
392 { HandleMark hm(thread); // HandleMark used by HandleMarkCleaner
393
394 // NOTE: if we move the computation of the result_val_address inside
395 // the call to call_stub, the optimizer produces wrong code.
396 intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());
397 intptr_t* parameter_address = args->parameters();
398
399 address entry_point;
400 {
401 // The enter_interp_only_mode use handshake to set interp_only mode
402 // so no safepoint should be allowed between is_interp_only_mode() and call
403 NoSafepointVerifier nsv;
404 bool is_interp_only_mode = (StressCallingConvention && (os::random() % (1 << 10)) == 0) || thread->is_interp_only_mode();
405 if (JvmtiExport::can_post_interpreter_events() && is_interp_only_mode) {
406 entry_point = method->interpreter_entry();
407 } else {
408 // Since the call stub sets up like the interpreter we call the from_interpreted_entry
409 // so we can go compiled via a i2c.
410 entry_point = method->from_interpreted_entry();
411 #if INCLUDE_JVMCI
412 // Gets the alternative target (if any) that should be called
413 Handle alternative_target = args->alternative_target();
414 if (!alternative_target.is_null()) {
415 // Must extract verified entry point from HotSpotNmethod after VM to Java
416 // transition in JavaCallWrapper constructor so that it is safe with
417 // respect to nmethod sweeping.
418 address verified_entry_point = (address) HotSpotJVMCI::InstalledCode::entryPoint(nullptr, alternative_target());
419 if (verified_entry_point != nullptr) {
420 thread->set_jvmci_alternate_call_target(verified_entry_point);
421 entry_point = method->get_i2c_entry();
422 }
423 }
424 #endif
425 }
438 CHECK
439 );
440 }
441
442 result = link.result(); // circumvent MS C++ 5.0 compiler bug (result is clobbered across call)
443 // Preserve oop return value across possible gc points
444 if (oop_result_flag) {
445 thread->set_vm_result_oop(result->get_oop());
446 }
447 }
448 } // Exit JavaCallWrapper (can block - potential return oop must be preserved)
449
450 // Check if a thread stop or suspend should be executed
451 // The following assert was not realistic. Thread.stop can set that bit at any moment.
452 //assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed");
453
454 // Restore possible oop return
455 if (oop_result_flag) {
456 result->set_oop(thread->vm_result_oop());
457 thread->set_vm_result_oop(nullptr);
458 JNIHandles::destroy_local(value_buffer);
459 }
460 }
461
462
463 //--------------------------------------------------------------------------------------
464 // Implementation of JavaCallArguments
465
466 inline bool is_value_state_indirect_oop(uint state) {
467 assert(state != JavaCallArguments::value_state_oop,
468 "Checking for handles after removal");
469 assert(state < JavaCallArguments::value_state_limit,
470 "Invalid value state %u", state);
471 return state != JavaCallArguments::value_state_primitive;
472 }
473
474 inline oop resolve_indirect_oop(intptr_t value, uint state) {
475 switch (state) {
476 case JavaCallArguments::value_state_handle:
477 {
478 oop* ptr = reinterpret_cast<oop*>(value);
587 case T_INT:
588 case T_FLOAT: // this one also
589 check_single_word(); break;
590 case T_LONG:
591 case T_DOUBLE:
592 check_double_word(); break;
593 case T_ARRAY:
594 case T_OBJECT:
595 check_reference(); break;
596 default:
597 ShouldNotReachHere();
598 }
599 }
600 };
601
602
603 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) {
604 guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");
605
606 // Treat T_OBJECT and T_ARRAY as the same
607 if (return_type == T_ARRAY) return_type = T_OBJECT;
608
609 // Check that oop information is correct
610 Symbol* signature = method->signature();
611
612 SignatureChekker sc(signature,
613 return_type,
614 method->is_static(),
615 _value_state,
616 _value);
617 }
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