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 #ifndef SHARE_RUNTIME_SHAREDRUNTIME_HPP
26 #define SHARE_RUNTIME_SHAREDRUNTIME_HPP
27
28 #include "code/codeBlob.hpp"
29 #include "code/vmreg.hpp"
30 #include "interpreter/linkResolver.hpp"
31 #include "memory/allStatic.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "runtime/safepointVerifiers.hpp"
34 #include "runtime/stubInfo.hpp"
35 #include "utilities/macros.hpp"
36
37 class AdapterHandlerEntry;
38 class AdapterFingerPrint;
39 class MetaspaceClosure;
40 class SerializeClosure;
41 class vframeStream;
42
43 // Runtime is the base class for various runtime interfaces
44 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
45 // shared functionality such as exception forwarding (C++ to
46 // Java exceptions), locking/unlocking mechanisms, statistical
47 // information, etc.
48
49 class SharedRuntime: AllStatic {
50 private:
51 // Declare shared stub fields
52 #define SHARED_STUB_FIELD_DECLARE(name, type) \
53 static type* BLOB_FIELD_NAME(name);
54 SHARED_STUBS_DO(SHARED_STUB_FIELD_DECLARE)
55 #undef SHARED_STUB_FIELD_DECLARE
56
57 #ifdef ASSERT
58 static bool is_resolve_id(StubId id) {
59 return (id == StubId::shared_wrong_method_id ||
60 id == StubId::shared_wrong_method_abstract_id ||
61 id == StubId::shared_ic_miss_id ||
75 id == StubId::shared_throw_StackOverflowError_id ||
76 id == StubId::shared_throw_delayed_StackOverflowError_id);
77 }
78 #endif
79
80 // cont_doYieldStub is not yet folded into the general model for
81 // shared stub/blob handling. It is actually a specially generated
82 // native wrapper for a specific native method, as also is it's
83 // counterpart the continuation do_enter method.
84 static nmethod* _cont_doYield_stub;
85
86 #ifndef PRODUCT
87 // Counters
88 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
89 #endif // !PRODUCT
90
91 private:
92 static SafepointBlob* generate_handler_blob(StubId id, address call_ptr);
93 static RuntimeStub* generate_resolve_blob(StubId id, address destination);
94 static RuntimeStub* generate_throw_exception(StubId id, address runtime_entry);
95 public:
96 static void generate_initial_stubs(void);
97 static void generate_stubs(void);
98 #if INCLUDE_JFR
99 static void generate_jfr_stubs(void);
100 // For c2: c_rarg0 is junk, call to runtime to write a checkpoint.
101 // It returns a jobject handle to the event writer.
102 // The handle is dereferenced and the return value is the event writer oop.
103 static RuntimeStub* generate_jfr_write_checkpoint();
104 // For c2: call to runtime to return a buffer lease.
105 static RuntimeStub* generate_jfr_return_lease();
106 #endif
107 static void init_adapter_library();
108
109 static const char *stub_name(StubId id) {
110 assert(StubInfo::is_shared(id), "not a shared stub %s", StubInfo::name(id));
111 return StubInfo::name(id);
112 }
113
114 // max bytes for each dtrace string parameter
280 assert(_throw_AbstractMethodError_blob != nullptr, "");
281 return _throw_AbstractMethodError_blob->entry_point();
282 }
283 static address throw_IncompatibleClassChangeError_entry() {
284 assert(_throw_IncompatibleClassChangeError_blob != nullptr, "");
285 return _throw_IncompatibleClassChangeError_blob->entry_point();
286 }
287 static address throw_NullPointerException_at_call_entry() {
288 assert(_throw_NullPointerException_at_call_blob != nullptr, "");
289 return _throw_NullPointerException_at_call_blob->entry_point();
290 }
291 static address throw_StackOverflowError_entry() {
292 assert(_throw_StackOverflowError_blob != nullptr, "");
293 return _throw_StackOverflowError_blob->entry_point();
294 }
295 static address throw_delayed_StackOverflowError_entry() {
296 assert(_throw_delayed_StackOverflowError_blob != nullptr, "");
297 return _throw_delayed_StackOverflowError_blob->entry_point();
298 }
299
300 #if INCLUDE_JFR
301 static address jfr_write_checkpoint() {
302 assert(_jfr_write_checkpoint_blob != nullptr, "");
303 return _jfr_write_checkpoint_blob->entry_point();
304 }
305 static address jfr_return_lease() {
306 assert(_jfr_return_lease_blob != nullptr, "");
307 return _jfr_return_lease_blob->entry_point();
308 }
309 #endif
310
311 // Counters
312 #ifndef PRODUCT
313 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
314 #endif // PRODUCT
315
316 // Helper routine for full-speed JVMTI exception throwing support
317 static void throw_and_post_jvmti_exception(JavaThread* current, Handle h_exception);
318 static void throw_and_post_jvmti_exception(JavaThread* current, Symbol* name, const char *message = nullptr);
319
351 // on top of the stack.
352 // The caller (or one of its callers) must use a ResourceMark
353 // in order to correctly free the result.
354 //
355 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
356
357 // Fill in the "X cannot be cast to a Y" message for ClassCastException
358 //
359 // @param caster_klass the class of the object we are casting
360 // @param target_klass the target klass attempt
361 // @return the dynamically allocated exception message (must be freed
362 // by the caller using a resource mark)
363 //
364 // This version does not require access the frame, so it can be called
365 // from interpreted code
366 // The caller (or one of it's callers) must use a ResourceMark
367 // in order to correctly free the result.
368 //
369 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr);
370
371 // Resolves a call site- may patch in the destination of the call into the
372 // compiled code.
373 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, TRAPS);
374
375 private:
376 // deopt blob
377 static void generate_deopt_blob(void);
378
379 public:
380 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
381
382 // Resets a call-site in compiled code so it will get resolved again.
383 static methodHandle reresolve_call_site(TRAPS);
384
385 // In the code prolog, if the klass comparison fails, the inline cache
386 // misses and the call site is patched to megamorphic
387 static methodHandle handle_ic_miss_helper(TRAPS);
388
389 // Find the method that called us.
390 static methodHandle find_callee_method(TRAPS);
391
392 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
393
394 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
395
396 private:
397 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
398 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
399
400 static Method* extract_attached_method(vframeStream& vfst);
401
402 #if defined(X86) && defined(COMPILER1)
403 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
404 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
405 #endif // X86 && COMPILER1
406
407 public:
408
409 // Read the array of BasicTypes from a Java signature, and compute where
410 // compiled Java code would like to put the results. Values in reg_lo and
411 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
412 // registers, those above refer to 4-byte stack slots. All stack slots are
413 // based off of the window top. SharedInfo::stack0 refers to the first usable
414 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
415 // 4-bytes higher.
416 // return value is the maximum number of VMReg stack slots the convention will use.
417 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
418
419 static void check_member_name_argument_is_last_argument(const methodHandle& method,
420 const BasicType* sig_bt,
421 const VMRegPair* regs) NOT_DEBUG_RETURN;
422
423 // Ditto except for calling C
424 //
425 // C argument in register AND stack slot.
426 // Some architectures require that an argument must be passed in a register
427 // AND in a stack slot. These architectures provide a second VMRegPair array
428 // to be filled by the c_calling_convention method. On other architectures,
429 // null is being passed as the second VMRegPair array, so arguments are either
430 // passed in a register OR in a stack slot.
431 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
432
433 static int vector_calling_convention(VMRegPair *regs,
434 uint num_bits,
435 uint total_args_passed);
436
437 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
444 // by the time we reach the blob there is compiled code available. This allows
445 // the blob to pass the incoming stack pointer (the sender sp) in a known
446 // location for the interpreter to record. This is used by the frame code
447 // to correct the sender code to match up with the stack pointer when the
448 // thread left the compiled code. In addition it allows the interpreter
449 // to remove the space the c2i adapter allocated to do its argument conversion.
450
451 // Although a c2i blob will always run interpreted even if compiled code is
452 // present if we see that compiled code is present the compiled call site
453 // will be patched/re-resolved so that later calls will run compiled.
454
455 // Additionally a c2i blob need to have a unverified entry because it can be reached
456 // in situations where the call site is an inlined cache site and may go megamorphic.
457
458 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
459 // that the interpreter before it does any call dispatch will record the current
460 // stack pointer in the interpreter frame. On return it will restore the stack
461 // pointer as needed. This means the i2c adapter code doesn't need any special
462 // handshaking path with compiled code to keep the stack walking correct.
463
464 static void generate_i2c2i_adapters(MacroAssembler *_masm,
465 int total_args_passed,
466 int max_arg,
467 const BasicType *sig_bt,
468 const VMRegPair *regs,
469 address entry_address[AdapterBlob::ENTRY_COUNT]);
470
471 static void gen_i2c_adapter(MacroAssembler *_masm,
472 int total_args_passed,
473 int comp_args_on_stack,
474 const BasicType *sig_bt,
475 const VMRegPair *regs);
476
477 // OSR support
478
479 // OSR_migration_begin will extract the jvm state from an interpreter
480 // frame (locals, monitors) and store the data in a piece of C heap
481 // storage. This then allows the interpreter frame to be removed from the
482 // stack and the OSR nmethod to be called. That method is called with a
483 // pointer to the C heap storage. This pointer is the return value from
484 // OSR_migration_begin.
485
486 static intptr_t* OSR_migration_begin(JavaThread *thread);
487
488 // OSR_migration_end is a trivial routine. It is called after the compiled
489 // method has extracted the jvm state from the C heap that OSR_migration_begin
490 // created. It's entire job is to simply free this storage.
491 static void OSR_migration_end(intptr_t* buf);
492
493 // Convert a sig into a calling convention register layout
494 // and find interesting things about it.
526 // returns.
527 //
528 // The wrapper may contain special-case code if the given method
529 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
530 static nmethod* generate_native_wrapper(MacroAssembler* masm,
531 const methodHandle& method,
532 int compile_id,
533 BasicType* sig_bt,
534 VMRegPair* regs,
535 BasicType ret_type);
536
537 // A compiled caller has just called the interpreter, but compiled code
538 // exists. Patch the caller so he no longer calls into the interpreter.
539 static void fixup_callers_callsite(Method* moop, address ret_pc);
540
541 // Slow-path Locking and Unlocking
542 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
543 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
544
545 // Resolving of calls
546 static address get_resolved_entry (JavaThread* current, methodHandle callee_method);
547 static address resolve_static_call_C (JavaThread* current);
548 static address resolve_virtual_call_C (JavaThread* current);
549 static address resolve_opt_virtual_call_C(JavaThread* current);
550
551 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
552 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
553 oopDesc* dest, jint dest_pos,
554 jint length, JavaThread* thread);
555
556 // handle ic miss with caller being compiled code
557 // wrong method handling (inline cache misses)
558 static address handle_wrong_method(JavaThread* current);
559 static address handle_wrong_method_abstract(JavaThread* current);
560 static address handle_wrong_method_ic_miss(JavaThread* current);
561
562 static address handle_unsafe_access(JavaThread* thread, address next_pc);
563
564 #ifndef PRODUCT
565
566 // Collect and print inline cache miss statistics
567 private:
568 enum { maxICmiss_count = 100 };
569 static int _ICmiss_index; // length of IC miss histogram
570 static int _ICmiss_count[maxICmiss_count]; // miss counts
571 static address _ICmiss_at[maxICmiss_count]; // miss addresses
572 static void trace_ic_miss(address at);
573
574 public:
575 static uint _ic_miss_ctr; // total # of IC misses
576 static uint _wrong_method_ctr;
577 static uint _resolve_static_ctr;
578 static uint _resolve_virtual_ctr;
579 static uint _resolve_opt_virtual_ctr;
580 static uint _implicit_null_throws;
581 static uint _implicit_div0_throws;
582
583 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy
682 //
683 // The C2I flavor takes a stock compiled call setup plus the target method in
684 // Rmethod, marshals the arguments for an interpreted call and jumps to
685 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
686 // setup. Compiled frames are fixed-size and the args are likely not in the
687 // right place. Hence all the args will likely be copied into the
688 // interpreter's frame, forcing that frame to grow. The compiled frame's
689 // outgoing stack args will be dead after the copy.
690 //
691 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
692 // also perform an official frame push & pop. They have a call to the native
693 // routine in their middles and end in a return (instead of ending in a jump).
694 // The native wrappers are stored in real nmethods instead of the BufferBlobs
695 // used by the adapters. The code generation happens here because it's very
696 // similar to what the adapters have to do.
697
698 class AdapterHandlerEntry : public MetaspaceObj {
699 friend class AdapterHandlerLibrary;
700
701 public:
702 static const int ENTRIES_COUNT = 4;
703
704 private:
705 AdapterFingerPrint* _fingerprint;
706 AdapterBlob* _adapter_blob;
707 uint _id;
708 bool _linked;
709
710 static const char *_entry_names[];
711
712 #ifdef ASSERT
713 // Captures code and signature used to generate this adapter when
714 // verifying adapter equivalence.
715 unsigned char* _saved_code;
716 int _saved_code_length;
717 #endif
718
719 AdapterHandlerEntry(int id, AdapterFingerPrint* fingerprint) :
720 _fingerprint(fingerprint),
721 _adapter_blob(nullptr),
722 _id(id),
723 _linked(false)
724 #ifdef ASSERT
725 , _saved_code(nullptr),
726 _saved_code_length(0)
727 #endif
728 { }
729
730 ~AdapterHandlerEntry();
731
732 // Allocate on CHeap instead of metaspace (see JDK-8331086).
733 // Dummy argument is used to avoid C++ warning about using
734 // deleted opearator MetaspaceObj::delete().
735 void* operator new(size_t size, size_t dummy) throw() {
736 assert(size == BytesPerWord * heap_word_size(sizeof(AdapterHandlerEntry)), "should match");
737 void* p = AllocateHeap(size, mtCode);
738 memset(p, 0, size);
739 return p;
740 }
741
742 public:
743 static AdapterHandlerEntry* allocate(uint id, AdapterFingerPrint* fingerprint) {
754 }
755
756 address get_i2c_entry() const {
757 #ifndef ZERO
758 assert(_adapter_blob != nullptr, "must be");
759 return _adapter_blob->i2c_entry();
760 #else
761 return nullptr;
762 #endif // ZERO
763 }
764
765 address get_c2i_entry() const {
766 #ifndef ZERO
767 assert(_adapter_blob != nullptr, "must be");
768 return _adapter_blob->c2i_entry();
769 #else
770 return nullptr;
771 #endif // ZERO
772 }
773
774 address get_c2i_unverified_entry() const {
775 #ifndef ZERO
776 assert(_adapter_blob != nullptr, "must be");
777 return _adapter_blob->c2i_unverified_entry();
778 #else
779 return nullptr;
780 #endif // ZERO
781 }
782
783 address get_c2i_no_clinit_check_entry() const {
784 #ifndef ZERO
785 assert(_adapter_blob != nullptr, "must be");
786 return _adapter_blob->c2i_no_clinit_check_entry();
787 #else
788 return nullptr;
789 #endif // ZERO
790 }
791
792 AdapterBlob* adapter_blob() const { return _adapter_blob; }
793 bool is_linked() const { return _linked; }
794
795 uint id() const { return _id; }
796 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
797
798 #ifdef ASSERT
799 // Used to verify that code generated for shared adapters is equivalent
800 void save_code (unsigned char* code, int length);
801 bool compare_code(AdapterHandlerEntry* other);
802 #endif
803
804 //virtual void print_on(outputStream* st) const; DO NOT USE
805 void print_adapter_on(outputStream* st) const;
806
807 void metaspace_pointers_do(MetaspaceClosure* it);
808 int size() const {return (int)heap_word_size(sizeof(AdapterHandlerEntry)); }
809 MetaspaceObj::Type type() const { return AdapterHandlerEntryType; }
810
811 void remove_unshareable_info() NOT_CDS_RETURN;
812 void link() NOT_CDS_RETURN;
813 };
814
815 #if INCLUDE_CDS
816 class ArchivedAdapterTable;
817 #endif // INCLUDE_CDS
818
819 class AdapterHandlerLibrary: public AllStatic {
820 friend class SharedRuntime;
821 private:
822 static volatile uint _id_counter; // counter for generating unique adapter ids, range = [1,UINT_MAX]
823 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
824 static AdapterHandlerEntry* _no_arg_handler;
825 static AdapterHandlerEntry* _int_arg_handler;
826 static AdapterHandlerEntry* _obj_arg_handler;
827 static AdapterHandlerEntry* _obj_int_arg_handler;
828 static AdapterHandlerEntry* _obj_obj_arg_handler;
829 #if INCLUDE_CDS
830 static ArchivedAdapterTable _aot_adapter_handler_table;
831 #endif // INCLUDE_CDS
832
833 static BufferBlob* buffer_blob();
834 static void initialize();
835 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
836 static void lookup_aot_cache(AdapterHandlerEntry* handler);
837 static AdapterHandlerEntry* create_adapter(int total_args_passed,
838 BasicType* sig_bt,
839 bool is_transient = false);
840 static void lookup_simple_adapters() NOT_CDS_RETURN;
841 #ifndef PRODUCT
842 static void print_adapter_handler_info(outputStream* st, AdapterHandlerEntry* handler);
843 #endif // PRODUCT
844 public:
845
846 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint);
847 static void create_native_wrapper(const methodHandle& method);
848 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
849 static AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt);
850 static bool generate_adapter_code(AdapterHandlerEntry* handler,
851 int total_args_passed,
852 BasicType* sig_bt,
853 bool is_transient);
854
855 #ifdef ASSERT
856 static void verify_adapter_sharing(int total_args_passed, BasicType* sig_bt, AdapterHandlerEntry* cached);
857 #endif // ASSERT
858
859 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
860 static void print_handler_on(outputStream* st, const CodeBlob* b);
861 static const char* name(AdapterHandlerEntry* handler);
862 static uint32_t id(AdapterHandlerEntry* handler);
863 #ifndef PRODUCT
864 static void print_statistics();
865 #endif // PRODUCT
866
867 static void link_aot_adapter_handler(AdapterHandlerEntry* handler) NOT_CDS_RETURN;
868 static void dump_aot_adapter_table() NOT_CDS_RETURN;
869 static void serialize_shared_table_header(SerializeClosure* soc) NOT_CDS_RETURN;
870 static void link_aot_adapters() NOT_CDS_RETURN;
871 static void address_to_offset(address entry_address[AdapterBlob::ENTRY_COUNT], int entry_offset[AdapterBlob::ENTRY_COUNT]);
872 };
873
874 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP
|
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 #ifndef SHARE_RUNTIME_SHAREDRUNTIME_HPP
26 #define SHARE_RUNTIME_SHAREDRUNTIME_HPP
27
28 #include "asm/codeBuffer.hpp"
29 #include "code/codeBlob.hpp"
30 #include "code/vmreg.hpp"
31 #include "interpreter/linkResolver.hpp"
32 #include "memory/allStatic.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "runtime/safepointVerifiers.hpp"
35 #include "runtime/signature.hpp"
36 #include "runtime/stubInfo.hpp"
37 #include "utilities/macros.hpp"
38
39 class AdapterHandlerEntry;
40 class AdapterFingerPrint;
41 class MetaspaceClosure;
42 class SerializeClosure;
43 class vframeStream;
44 class SigEntry;
45
46 // Runtime is the base class for various runtime interfaces
47 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
48 // shared functionality such as exception forwarding (C++ to
49 // Java exceptions), locking/unlocking mechanisms, statistical
50 // information, etc.
51
52 class SharedRuntime: AllStatic {
53 private:
54 // Declare shared stub fields
55 #define SHARED_STUB_FIELD_DECLARE(name, type) \
56 static type* BLOB_FIELD_NAME(name);
57 SHARED_STUBS_DO(SHARED_STUB_FIELD_DECLARE)
58 #undef SHARED_STUB_FIELD_DECLARE
59
60 #ifdef ASSERT
61 static bool is_resolve_id(StubId id) {
62 return (id == StubId::shared_wrong_method_id ||
63 id == StubId::shared_wrong_method_abstract_id ||
64 id == StubId::shared_ic_miss_id ||
78 id == StubId::shared_throw_StackOverflowError_id ||
79 id == StubId::shared_throw_delayed_StackOverflowError_id);
80 }
81 #endif
82
83 // cont_doYieldStub is not yet folded into the general model for
84 // shared stub/blob handling. It is actually a specially generated
85 // native wrapper for a specific native method, as also is it's
86 // counterpart the continuation do_enter method.
87 static nmethod* _cont_doYield_stub;
88
89 #ifndef PRODUCT
90 // Counters
91 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
92 #endif // !PRODUCT
93
94 private:
95 static SafepointBlob* generate_handler_blob(StubId id, address call_ptr);
96 static RuntimeStub* generate_resolve_blob(StubId id, address destination);
97 static RuntimeStub* generate_throw_exception(StubId id, address runtime_entry);
98 static RuntimeStub* generate_return_value_stub(address destination);
99 public:
100 static void generate_initial_stubs(void);
101 static void generate_stubs(void);
102 #if INCLUDE_JFR
103 static void generate_jfr_stubs(void);
104 // For c2: c_rarg0 is junk, call to runtime to write a checkpoint.
105 // It returns a jobject handle to the event writer.
106 // The handle is dereferenced and the return value is the event writer oop.
107 static RuntimeStub* generate_jfr_write_checkpoint();
108 // For c2: call to runtime to return a buffer lease.
109 static RuntimeStub* generate_jfr_return_lease();
110 #endif
111 static void init_adapter_library();
112
113 static const char *stub_name(StubId id) {
114 assert(StubInfo::is_shared(id), "not a shared stub %s", StubInfo::name(id));
115 return StubInfo::name(id);
116 }
117
118 // max bytes for each dtrace string parameter
284 assert(_throw_AbstractMethodError_blob != nullptr, "");
285 return _throw_AbstractMethodError_blob->entry_point();
286 }
287 static address throw_IncompatibleClassChangeError_entry() {
288 assert(_throw_IncompatibleClassChangeError_blob != nullptr, "");
289 return _throw_IncompatibleClassChangeError_blob->entry_point();
290 }
291 static address throw_NullPointerException_at_call_entry() {
292 assert(_throw_NullPointerException_at_call_blob != nullptr, "");
293 return _throw_NullPointerException_at_call_blob->entry_point();
294 }
295 static address throw_StackOverflowError_entry() {
296 assert(_throw_StackOverflowError_blob != nullptr, "");
297 return _throw_StackOverflowError_blob->entry_point();
298 }
299 static address throw_delayed_StackOverflowError_entry() {
300 assert(_throw_delayed_StackOverflowError_blob != nullptr, "");
301 return _throw_delayed_StackOverflowError_blob->entry_point();
302 }
303
304 // Value types
305 static address store_inline_type_fields_to_buf_entry() {
306 assert(_store_inline_type_fields_to_buf_blob != nullptr, "");
307 return _store_inline_type_fields_to_buf_blob->entry_point();
308 }
309
310 #if INCLUDE_JFR
311 static address jfr_write_checkpoint() {
312 assert(_jfr_write_checkpoint_blob != nullptr, "");
313 return _jfr_write_checkpoint_blob->entry_point();
314 }
315 static address jfr_return_lease() {
316 assert(_jfr_return_lease_blob != nullptr, "");
317 return _jfr_return_lease_blob->entry_point();
318 }
319 #endif
320
321 // Counters
322 #ifndef PRODUCT
323 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
324 #endif // PRODUCT
325
326 // Helper routine for full-speed JVMTI exception throwing support
327 static void throw_and_post_jvmti_exception(JavaThread* current, Handle h_exception);
328 static void throw_and_post_jvmti_exception(JavaThread* current, Symbol* name, const char *message = nullptr);
329
361 // on top of the stack.
362 // The caller (or one of its callers) must use a ResourceMark
363 // in order to correctly free the result.
364 //
365 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
366
367 // Fill in the "X cannot be cast to a Y" message for ClassCastException
368 //
369 // @param caster_klass the class of the object we are casting
370 // @param target_klass the target klass attempt
371 // @return the dynamically allocated exception message (must be freed
372 // by the caller using a resource mark)
373 //
374 // This version does not require access the frame, so it can be called
375 // from interpreted code
376 // The caller (or one of it's callers) must use a ResourceMark
377 // in order to correctly free the result.
378 //
379 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr);
380
381 static char* generate_identity_exception_message(JavaThread* thr, Klass* klass);
382
383 // Resolves a call site- may patch in the destination of the call into the
384 // compiled code.
385 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, bool& caller_does_not_scalarize, TRAPS);
386
387 private:
388 // deopt blob
389 static void generate_deopt_blob(void);
390
391 public:
392 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
393
394 // Resets a call-site in compiled code so it will get resolved again.
395 static methodHandle reresolve_call_site(bool& is_optimized, bool& caller_does_not_scalarize, TRAPS);
396
397 // In the code prolog, if the klass comparison fails, the inline cache
398 // misses and the call site is patched to megamorphic
399 static methodHandle handle_ic_miss_helper(bool& caller_does_not_scalarize, TRAPS);
400
401 // Find the method that called us.
402 static methodHandle find_callee_method(bool& caller_does_not_scalarize, TRAPS);
403
404 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
405
406 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
407
408 private:
409 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
410 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
411
412 static Method* extract_attached_method(vframeStream& vfst);
413
414 #if defined(X86) && defined(COMPILER1)
415 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
416 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
417 #endif // X86 && COMPILER1
418
419 public:
420
421 // Read the array of BasicTypes from a Java signature, and compute where
422 // compiled Java code would like to put the results. Values in reg_lo and
423 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
424 // registers, those above refer to 4-byte stack slots. All stack slots are
425 // based off of the window top. SharedInfo::stack0 refers to the first usable
426 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
427 // 4-bytes higher.
428 // return value is the maximum number of VMReg stack slots the convention will use.
429 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
430 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
431 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
432 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
433 return java_calling_convention(sig_bt, regs, total_args_passed);
434 }
435 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
436 static const uint java_return_convention_max_int;
437 static const uint java_return_convention_max_float;
438
439 static void check_member_name_argument_is_last_argument(const methodHandle& method,
440 const BasicType* sig_bt,
441 const VMRegPair* regs) NOT_DEBUG_RETURN;
442
443 // Ditto except for calling C
444 //
445 // C argument in register AND stack slot.
446 // Some architectures require that an argument must be passed in a register
447 // AND in a stack slot. These architectures provide a second VMRegPair array
448 // to be filled by the c_calling_convention method. On other architectures,
449 // null is being passed as the second VMRegPair array, so arguments are either
450 // passed in a register OR in a stack slot.
451 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
452
453 static int vector_calling_convention(VMRegPair *regs,
454 uint num_bits,
455 uint total_args_passed);
456
457 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
464 // by the time we reach the blob there is compiled code available. This allows
465 // the blob to pass the incoming stack pointer (the sender sp) in a known
466 // location for the interpreter to record. This is used by the frame code
467 // to correct the sender code to match up with the stack pointer when the
468 // thread left the compiled code. In addition it allows the interpreter
469 // to remove the space the c2i adapter allocated to do its argument conversion.
470
471 // Although a c2i blob will always run interpreted even if compiled code is
472 // present if we see that compiled code is present the compiled call site
473 // will be patched/re-resolved so that later calls will run compiled.
474
475 // Additionally a c2i blob need to have a unverified entry because it can be reached
476 // in situations where the call site is an inlined cache site and may go megamorphic.
477
478 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
479 // that the interpreter before it does any call dispatch will record the current
480 // stack pointer in the interpreter frame. On return it will restore the stack
481 // pointer as needed. This means the i2c adapter code doesn't need any special
482 // handshaking path with compiled code to keep the stack walking correct.
483
484 static void generate_i2c2i_adapters(MacroAssembler* _masm,
485 int total_args_passed,
486 const GrowableArray<SigEntry>* sig,
487 const VMRegPair* regs,
488 const GrowableArray<SigEntry>* sig_cc,
489 const VMRegPair* regs_cc,
490 const GrowableArray<SigEntry>* sig_cc_ro,
491 const VMRegPair* regs_cc_ro,
492 address entry_address[AdapterBlob::ENTRY_COUNT],
493 AdapterBlob*& new_adapter,
494 bool allocate_code_blob);
495
496 static void gen_i2c_adapter(MacroAssembler *_masm,
497 int comp_args_on_stack,
498 const GrowableArray<SigEntry>* sig,
499 const VMRegPair *regs);
500
501 // OSR support
502
503 // OSR_migration_begin will extract the jvm state from an interpreter
504 // frame (locals, monitors) and store the data in a piece of C heap
505 // storage. This then allows the interpreter frame to be removed from the
506 // stack and the OSR nmethod to be called. That method is called with a
507 // pointer to the C heap storage. This pointer is the return value from
508 // OSR_migration_begin.
509
510 static intptr_t* OSR_migration_begin(JavaThread *thread);
511
512 // OSR_migration_end is a trivial routine. It is called after the compiled
513 // method has extracted the jvm state from the C heap that OSR_migration_begin
514 // created. It's entire job is to simply free this storage.
515 static void OSR_migration_end(intptr_t* buf);
516
517 // Convert a sig into a calling convention register layout
518 // and find interesting things about it.
550 // returns.
551 //
552 // The wrapper may contain special-case code if the given method
553 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
554 static nmethod* generate_native_wrapper(MacroAssembler* masm,
555 const methodHandle& method,
556 int compile_id,
557 BasicType* sig_bt,
558 VMRegPair* regs,
559 BasicType ret_type);
560
561 // A compiled caller has just called the interpreter, but compiled code
562 // exists. Patch the caller so he no longer calls into the interpreter.
563 static void fixup_callers_callsite(Method* moop, address ret_pc);
564
565 // Slow-path Locking and Unlocking
566 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
567 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
568
569 // Resolving of calls
570 static address get_resolved_entry (JavaThread* current, methodHandle callee_method,
571 bool is_static_call, bool is_optimized, bool caller_does_not_scalarize);
572 static address resolve_static_call_C (JavaThread* current);
573 static address resolve_virtual_call_C (JavaThread* current);
574 static address resolve_opt_virtual_call_C(JavaThread* current);
575
576 static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res);
577 static void store_inline_type_fields_to_buf(JavaThread* current, intptr_t res);
578
579 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
580 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
581 oopDesc* dest, jint dest_pos,
582 jint length, JavaThread* thread);
583
584 // handle ic miss with caller being compiled code
585 // wrong method handling (inline cache misses)
586 static address handle_wrong_method(JavaThread* current);
587 static address handle_wrong_method_abstract(JavaThread* current);
588 static address handle_wrong_method_ic_miss(JavaThread* current);
589 static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver);
590 static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, bool from_c1, TRAPS);
591
592 static address handle_unsafe_access(JavaThread* thread, address next_pc);
593
594 static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* vk);
595 #ifndef PRODUCT
596
597 // Collect and print inline cache miss statistics
598 private:
599 enum { maxICmiss_count = 100 };
600 static int _ICmiss_index; // length of IC miss histogram
601 static int _ICmiss_count[maxICmiss_count]; // miss counts
602 static address _ICmiss_at[maxICmiss_count]; // miss addresses
603 static void trace_ic_miss(address at);
604
605 public:
606 static uint _ic_miss_ctr; // total # of IC misses
607 static uint _wrong_method_ctr;
608 static uint _resolve_static_ctr;
609 static uint _resolve_virtual_ctr;
610 static uint _resolve_opt_virtual_ctr;
611 static uint _implicit_null_throws;
612 static uint _implicit_div0_throws;
613
614 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy
713 //
714 // The C2I flavor takes a stock compiled call setup plus the target method in
715 // Rmethod, marshals the arguments for an interpreted call and jumps to
716 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
717 // setup. Compiled frames are fixed-size and the args are likely not in the
718 // right place. Hence all the args will likely be copied into the
719 // interpreter's frame, forcing that frame to grow. The compiled frame's
720 // outgoing stack args will be dead after the copy.
721 //
722 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
723 // also perform an official frame push & pop. They have a call to the native
724 // routine in their middles and end in a return (instead of ending in a jump).
725 // The native wrappers are stored in real nmethods instead of the BufferBlobs
726 // used by the adapters. The code generation happens here because it's very
727 // similar to what the adapters have to do.
728
729 class AdapterHandlerEntry : public MetaspaceObj {
730 friend class AdapterHandlerLibrary;
731
732 public:
733 static const int ENTRIES_COUNT = 7;
734
735 private:
736 AdapterFingerPrint* _fingerprint;
737 AdapterBlob* _adapter_blob;
738 uint _id;
739 bool _linked;
740
741 static const char *_entry_names[];
742
743 // Support for scalarized inline type calling convention
744 const GrowableArray<SigEntry>* _sig_cc;
745 const GrowableArray<SigEntry>* _sig_cc_ro;
746
747 #ifdef ASSERT
748 // Captures code and signature used to generate this adapter when
749 // verifying adapter equivalence.
750 unsigned char* _saved_code;
751 int _saved_code_length;
752 #endif
753
754 AdapterHandlerEntry(int id, AdapterFingerPrint* fingerprint) :
755 _fingerprint(fingerprint),
756 _adapter_blob(nullptr),
757 _id(id),
758 _linked(false),
759 _sig_cc(nullptr),
760 _sig_cc_ro(nullptr)
761 #ifdef ASSERT
762 , _saved_code(nullptr),
763 _saved_code_length(0)
764 #endif
765 { }
766
767 ~AdapterHandlerEntry();
768
769 // Allocate on CHeap instead of metaspace (see JDK-8331086).
770 // Dummy argument is used to avoid C++ warning about using
771 // deleted opearator MetaspaceObj::delete().
772 void* operator new(size_t size, size_t dummy) throw() {
773 assert(size == BytesPerWord * heap_word_size(sizeof(AdapterHandlerEntry)), "should match");
774 void* p = AllocateHeap(size, mtCode);
775 memset(p, 0, size);
776 return p;
777 }
778
779 public:
780 static AdapterHandlerEntry* allocate(uint id, AdapterFingerPrint* fingerprint) {
791 }
792
793 address get_i2c_entry() const {
794 #ifndef ZERO
795 assert(_adapter_blob != nullptr, "must be");
796 return _adapter_blob->i2c_entry();
797 #else
798 return nullptr;
799 #endif // ZERO
800 }
801
802 address get_c2i_entry() const {
803 #ifndef ZERO
804 assert(_adapter_blob != nullptr, "must be");
805 return _adapter_blob->c2i_entry();
806 #else
807 return nullptr;
808 #endif // ZERO
809 }
810
811 address get_c2i_inline_entry() const {
812 #ifndef ZERO
813 assert(_adapter_blob != nullptr, "must be");
814 return _adapter_blob->c2i_inline_entry();
815 #else
816 return nullptr;
817 #endif // ZERO
818 }
819
820 address get_c2i_inline_ro_entry() const {
821 #ifndef ZERO
822 assert(_adapter_blob != nullptr, "must be");
823 return _adapter_blob->c2i_inline_ro_entry();
824 #else
825 return nullptr;
826 #endif // ZERO
827 }
828
829 address get_c2i_unverified_entry() const {
830 #ifndef ZERO
831 assert(_adapter_blob != nullptr, "must be");
832 return _adapter_blob->c2i_unverified_entry();
833 #else
834 return nullptr;
835 #endif // ZERO
836 }
837
838 address get_c2i_unverified_inline_entry() const {
839 #ifndef ZERO
840 assert(_adapter_blob != nullptr, "must be");
841 return _adapter_blob->c2i_unverified_inline_entry();
842 #else
843 return nullptr;
844 #endif // ZERO
845 }
846
847 address get_c2i_no_clinit_check_entry() const {
848 #ifndef ZERO
849 assert(_adapter_blob != nullptr, "must be");
850 return _adapter_blob->c2i_no_clinit_check_entry();
851 #else
852 return nullptr;
853 #endif // ZERO
854 }
855
856 AdapterBlob* adapter_blob() const { return _adapter_blob; }
857 bool is_linked() const { return _linked; }
858
859 // Support for scalarized inline type calling convention
860 void set_sig_cc(const GrowableArray<SigEntry>* sig) {
861 assert(_sig_cc == nullptr, "Already initialized");
862 _sig_cc = sig;
863 }
864 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; }
865 void set_sig_cc_ro(const GrowableArray<SigEntry>* sig) {
866 assert(_sig_cc_ro == nullptr, "Already initialized");
867 _sig_cc_ro = sig;
868 }
869 const GrowableArray<SigEntry>* get_sig_cc_ro() const { return _sig_cc_ro; }
870
871 uint id() const { return _id; }
872 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
873
874 #ifdef ASSERT
875 // Used to verify that code generated for shared adapters is equivalent
876 void save_code (unsigned char* code, int length);
877 bool compare_code(AdapterHandlerEntry* other);
878 #endif
879
880 //virtual void print_on(outputStream* st) const; DO NOT USE
881 void print_adapter_on(outputStream* st) const;
882
883 void metaspace_pointers_do(MetaspaceClosure* it);
884 int size() const {return (int)heap_word_size(sizeof(AdapterHandlerEntry)); }
885 MetaspaceObj::Type type() const { return AdapterHandlerEntryType; }
886
887 void remove_unshareable_info() NOT_CDS_RETURN;
888 void link() NOT_CDS_RETURN;
889 };
890
891 #if INCLUDE_CDS
892 class ArchivedAdapterTable;
893 #endif // INCLUDE_CDS
894
895 class CompiledEntrySignature;
896
897 class AdapterHandlerLibrary: public AllStatic {
898 friend class SharedRuntime;
899 private:
900 static volatile uint _id_counter; // counter for generating unique adapter ids, range = [1,UINT_MAX]
901 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
902 static AdapterHandlerEntry* _no_arg_handler;
903 static AdapterHandlerEntry* _int_arg_handler;
904 static AdapterHandlerEntry* _obj_arg_handler;
905 static AdapterHandlerEntry* _obj_int_arg_handler;
906 static AdapterHandlerEntry* _obj_obj_arg_handler;
907 #if INCLUDE_CDS
908 static ArchivedAdapterTable _aot_adapter_handler_table;
909 #endif // INCLUDE_CDS
910
911 static BufferBlob* buffer_blob();
912 static void initialize();
913 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
914 static void lookup_aot_cache(AdapterHandlerEntry* handler);
915 static AdapterHandlerEntry* create_adapter(CompiledEntrySignature& ces,
916 bool allocate_code_blob,
917 bool is_transient = false);
918 static void lookup_simple_adapters() NOT_CDS_RETURN;
919 #ifndef PRODUCT
920 static void print_adapter_handler_info(outputStream* st, AdapterHandlerEntry* handler);
921 #endif // PRODUCT
922 public:
923
924 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint);
925 static void create_native_wrapper(const methodHandle& method);
926 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
927 static AdapterHandlerEntry* lookup(const GrowableArray<SigEntry>* sig, bool has_ro_adapter = false);
928 static bool generate_adapter_code(AdapterHandlerEntry* handler,
929 CompiledEntrySignature& ces,
930 bool allocate_code_blob,
931 bool is_transient);
932
933 #ifdef ASSERT
934 static void verify_adapter_sharing(CompiledEntrySignature& ces, AdapterHandlerEntry* cached_entry);
935 #endif // ASSERT
936
937 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
938 static void print_handler_on(outputStream* st, const CodeBlob* b);
939 static const char* name(AdapterHandlerEntry* handler);
940 static uint32_t id(AdapterHandlerEntry* handler);
941 #ifndef PRODUCT
942 static void print_statistics();
943 #endif // PRODUCT
944
945 static void link_aot_adapter_handler(AdapterHandlerEntry* handler) NOT_CDS_RETURN;
946 static void dump_aot_adapter_table() NOT_CDS_RETURN;
947 static void serialize_shared_table_header(SerializeClosure* soc) NOT_CDS_RETURN;
948 static void link_aot_adapters() NOT_CDS_RETURN;
949 static void address_to_offset(address entry_address[AdapterBlob::ENTRY_COUNT], int entry_offset[AdapterBlob::ENTRY_COUNT]);
950 };
951
952 // Utility class for computing the calling convention of the 3 types
953 // of compiled method entries:
954 // Method::_from_compiled_entry - sig_cc
955 // Method::_from_compiled_inline_ro_entry - sig_cc_ro
956 // Method::_from_compiled_inline_entry - sig
957 class CompiledEntrySignature : public StackObj {
958 private:
959 Method* _method;
960 int _num_inline_args;
961 bool _has_inline_recv;
962 GrowableArray<SigEntry>* _sig;
963 GrowableArray<SigEntry>* _sig_cc;
964 GrowableArray<SigEntry>* _sig_cc_ro;
965 VMRegPair* _regs;
966 VMRegPair* _regs_cc;
967 VMRegPair* _regs_cc_ro;
968
969 int _args_on_stack;
970 int _args_on_stack_cc;
971 int _args_on_stack_cc_ro;
972
973 bool _c1_needs_stack_repair;
974 bool _c2_needs_stack_repair;
975
976 GrowableArray<Method*>* _supers;
977 GrowableArray<Method*>* get_supers();
978 bool check_supers_and_deoptimize(int arg_num);
979
980 public:
981 Method* method() const { return _method; }
982
983 // Used by Method::_from_compiled_inline_entry
984 GrowableArray<SigEntry>* sig() const { return _sig; }
985
986 // Used by Method::_from_compiled_entry
987 GrowableArray<SigEntry>* sig_cc() const { return _sig_cc; }
988
989 // Used by Method::_from_compiled_inline_ro_entry
990 GrowableArray<SigEntry>* sig_cc_ro() const { return _sig_cc_ro; }
991
992 VMRegPair* regs() const { return _regs; }
993 VMRegPair* regs_cc() const { return _regs_cc; }
994 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; }
995
996 int args_on_stack() const { return _args_on_stack; }
997 int args_on_stack_cc() const { return _args_on_stack_cc; }
998 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; }
999
1000 int num_inline_args() const { return _num_inline_args; }
1001 bool has_inline_recv() const { return _has_inline_recv; }
1002
1003 bool has_scalarized_args() const { return _sig != _sig_cc; }
1004 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; }
1005 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; }
1006 CodeOffsets::Entries c1_inline_ro_entry_type() const;
1007
1008 CompiledEntrySignature(Method* method = nullptr);
1009 void compute_calling_conventions(bool link_time = true);
1010 void initialize_from_fingerprint(AdapterFingerPrint* fingerprint);
1011 };
1012
1013 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP
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