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/stubDeclarations.hpp"
34 #include "utilities/macros.hpp"
35
36 class AdapterHandlerEntry;
37 class AdapterFingerPrint;
38 class vframeStream;
39
40 // Runtime is the base class for various runtime interfaces
41 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
42 // shared functionality such as exception forwarding (C++ to
43 // Java exceptions), locking/unlocking mechanisms, statistical
44 // information, etc.
45
46 // define SharedStubId enum tags: wrong_method_id, etc
47
48 #define SHARED_STUB_ID_ENUM_DECLARE(name, type) STUB_ID_NAME(name),
49 enum class SharedStubId :int {
50 NO_STUBID = -1,
51 SHARED_STUBS_DO(SHARED_STUB_ID_ENUM_DECLARE)
52 NUM_STUBIDS
53 };
54 #undef SHARED_STUB_ID_ENUM_DECLARE
55
56 class SharedRuntime: AllStatic {
57 friend class VMStructs;
58
349 // on top of the stack.
350 // The caller (or one of its callers) must use a ResourceMark
351 // in order to correctly free the result.
352 //
353 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
354
355 // Fill in the "X cannot be cast to a Y" message for ClassCastException
356 //
357 // @param caster_klass the class of the object we are casting
358 // @param target_klass the target klass attempt
359 // @return the dynamically allocated exception message (must be freed
360 // by the caller using a resource mark)
361 //
362 // This version does not require access the frame, so it can be called
363 // from interpreted code
364 // The caller (or one of it's callers) must use a ResourceMark
365 // in order to correctly free the result.
366 //
367 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr);
368
369 // Resolves a call site- may patch in the destination of the call into the
370 // compiled code.
371 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, TRAPS);
372
373 private:
374 // deopt blob
375 static void generate_deopt_blob(void);
376
377 static bool handle_ic_miss_helper_internal(Handle receiver, nmethod* caller_nm, const frame& caller_frame,
378 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
379 bool& needs_ic_stub_refill, TRAPS);
380
381 public:
382 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
383
384 // Resets a call-site in compiled code so it will get resolved again.
385 static methodHandle reresolve_call_site(TRAPS);
386
387 // In the code prolog, if the klass comparison fails, the inline cache
388 // misses and the call site is patched to megamorphic
389 static methodHandle handle_ic_miss_helper(TRAPS);
390
391 // Find the method that called us.
392 static methodHandle find_callee_method(TRAPS);
393
394 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
395
396 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
397
398 // Issue UL warning for unlocked JNI monitor on virtual thread termination
399 static void log_jni_monitor_still_held();
400
401 private:
402 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
403 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
404
405 static Method* extract_attached_method(vframeStream& vfst);
406
407 #if defined(X86) && defined(COMPILER1)
408 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
409 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
410 #endif // X86 && COMPILER1
411
412 public:
413
414 // Read the array of BasicTypes from a Java signature, and compute where
415 // compiled Java code would like to put the results. Values in reg_lo and
416 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
417 // registers, those above refer to 4-byte stack slots. All stack slots are
418 // based off of the window top. SharedInfo::stack0 refers to the first usable
419 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
420 // 4-bytes higher.
421 // return value is the maximum number of VMReg stack slots the convention will use.
422 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
423
424 static void check_member_name_argument_is_last_argument(const methodHandle& method,
425 const BasicType* sig_bt,
426 const VMRegPair* regs) NOT_DEBUG_RETURN;
427
428 // Ditto except for calling C
429 //
430 // C argument in register AND stack slot.
431 // Some architectures require that an argument must be passed in a register
432 // AND in a stack slot. These architectures provide a second VMRegPair array
433 // to be filled by the c_calling_convention method. On other architectures,
434 // null is being passed as the second VMRegPair array, so arguments are either
435 // passed in a register OR in a stack slot.
436 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
437
438 static int vector_calling_convention(VMRegPair *regs,
439 uint num_bits,
440 uint total_args_passed);
441
442 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
449 // by the time we reach the blob there is compiled code available. This allows
450 // the blob to pass the incoming stack pointer (the sender sp) in a known
451 // location for the interpreter to record. This is used by the frame code
452 // to correct the sender code to match up with the stack pointer when the
453 // thread left the compiled code. In addition it allows the interpreter
454 // to remove the space the c2i adapter allocated to do its argument conversion.
455
456 // Although a c2i blob will always run interpreted even if compiled code is
457 // present if we see that compiled code is present the compiled call site
458 // will be patched/re-resolved so that later calls will run compiled.
459
460 // Additionally a c2i blob need to have a unverified entry because it can be reached
461 // in situations where the call site is an inlined cache site and may go megamorphic.
462
463 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
464 // that the interpreter before it does any call dispatch will record the current
465 // stack pointer in the interpreter frame. On return it will restore the stack
466 // pointer as needed. This means the i2c adapter code doesn't need any special
467 // handshaking path with compiled code to keep the stack walking correct.
468
469 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
470 int total_args_passed,
471 int max_arg,
472 const BasicType *sig_bt,
473 const VMRegPair *regs,
474 AdapterFingerPrint* fingerprint);
475
476 static void gen_i2c_adapter(MacroAssembler *_masm,
477 int total_args_passed,
478 int comp_args_on_stack,
479 const BasicType *sig_bt,
480 const VMRegPair *regs);
481
482 // OSR support
483
484 // OSR_migration_begin will extract the jvm state from an interpreter
485 // frame (locals, monitors) and store the data in a piece of C heap
486 // storage. This then allows the interpreter frame to be removed from the
487 // stack and the OSR nmethod to be called. That method is called with a
488 // pointer to the C heap storage. This pointer is the return value from
489 // OSR_migration_begin.
490
491 static intptr_t* OSR_migration_begin(JavaThread *thread);
492
493 // OSR_migration_end is a trivial routine. It is called after the compiled
494 // method has extracted the jvm state from the C heap that OSR_migration_begin
495 // created. It's entire job is to simply free this storage.
496 static void OSR_migration_end(intptr_t* buf);
497
498 // Convert a sig into a calling convention register layout
499 // and find interesting things about it.
528 //
529 // The wrapper may contain special-case code if the given method
530 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
531 static nmethod* generate_native_wrapper(MacroAssembler* masm,
532 const methodHandle& method,
533 int compile_id,
534 BasicType* sig_bt,
535 VMRegPair* regs,
536 BasicType ret_type);
537
538 // A compiled caller has just called the interpreter, but compiled code
539 // exists. Patch the caller so he no longer calls into the interpreter.
540 static void fixup_callers_callsite(Method* moop, address ret_pc);
541 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
542
543 // Slow-path Locking and Unlocking
544 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
545 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
546
547 // Resolving of calls
548 static address get_resolved_entry (JavaThread* current, methodHandle callee_method);
549 static address resolve_static_call_C (JavaThread* current);
550 static address resolve_virtual_call_C (JavaThread* current);
551 static address resolve_opt_virtual_call_C(JavaThread* current);
552
553 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
554 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
555 oopDesc* dest, jint dest_pos,
556 jint length, JavaThread* thread);
557
558 // handle ic miss with caller being compiled code
559 // wrong method handling (inline cache misses)
560 static address handle_wrong_method(JavaThread* current);
561 static address handle_wrong_method_abstract(JavaThread* current);
562 static address handle_wrong_method_ic_miss(JavaThread* current);
563
564 static address handle_unsafe_access(JavaThread* thread, address next_pc);
565
566 #ifndef PRODUCT
567
568 // Collect and print inline cache miss statistics
569 private:
570 enum { maxICmiss_count = 100 };
571 static int _ICmiss_index; // length of IC miss histogram
572 static int _ICmiss_count[maxICmiss_count]; // miss counts
573 static address _ICmiss_at[maxICmiss_count]; // miss addresses
574 static void trace_ic_miss(address at);
575
576 public:
577 static uint _ic_miss_ctr; // total # of IC misses
578 static uint _wrong_method_ctr;
579 static uint _resolve_static_ctr;
580 static uint _resolve_virtual_ctr;
581 static uint _resolve_opt_virtual_ctr;
582 static uint _implicit_null_throws;
583 static uint _implicit_div0_throws;
584
585 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy
654 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
655 // setup. Compiled frames are fixed-size and the args are likely not in the
656 // right place. Hence all the args will likely be copied into the
657 // interpreter's frame, forcing that frame to grow. The compiled frame's
658 // outgoing stack args will be dead after the copy.
659 //
660 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
661 // also perform an official frame push & pop. They have a call to the native
662 // routine in their middles and end in a return (instead of ending in a jump).
663 // The native wrappers are stored in real nmethods instead of the BufferBlobs
664 // used by the adapters. The code generation happens here because it's very
665 // similar to what the adapters have to do.
666
667 class AdapterHandlerEntry : public CHeapObj<mtCode> {
668 friend class AdapterHandlerLibrary;
669
670 private:
671 AdapterFingerPrint* _fingerprint;
672 address _i2c_entry;
673 address _c2i_entry;
674 address _c2i_unverified_entry;
675 address _c2i_no_clinit_check_entry;
676
677 #ifdef ASSERT
678 // Captures code and signature used to generate this adapter when
679 // verifying adapter equivalence.
680 unsigned char* _saved_code;
681 int _saved_code_length;
682 #endif
683
684 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
685 address c2i_unverified_entry,
686 address c2i_no_clinit_check_entry) :
687 _fingerprint(fingerprint),
688 _i2c_entry(i2c_entry),
689 _c2i_entry(c2i_entry),
690 _c2i_unverified_entry(c2i_unverified_entry),
691 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry)
692 #ifdef ASSERT
693 , _saved_code_length(0)
694 #endif
695 { }
696
697 ~AdapterHandlerEntry();
698
699 public:
700 address get_i2c_entry() const { return _i2c_entry; }
701 address get_c2i_entry() const { return _c2i_entry; }
702 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
703 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
704
705 address base_address();
706 void relocate(address new_base);
707
708 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
709
710 #ifdef ASSERT
711 // Used to verify that code generated for shared adapters is equivalent
712 void save_code (unsigned char* code, int length);
713 bool compare_code(AdapterHandlerEntry* other);
714 #endif
715
716 //virtual void print_on(outputStream* st) const; DO NOT USE
717 void print_adapter_on(outputStream* st) const;
718 };
719
720 class AdapterHandlerLibrary: public AllStatic {
721 friend class SharedRuntime;
722 private:
723 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
724 static AdapterHandlerEntry* _abstract_method_handler;
725 static AdapterHandlerEntry* _no_arg_handler;
726 static AdapterHandlerEntry* _int_arg_handler;
727 static AdapterHandlerEntry* _obj_arg_handler;
728 static AdapterHandlerEntry* _obj_int_arg_handler;
729 static AdapterHandlerEntry* _obj_obj_arg_handler;
730
731 static BufferBlob* buffer_blob();
732 static void initialize();
733 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
734 int total_args_passed,
735 BasicType* sig_bt,
736 bool allocate_code_blob);
737 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
738 public:
739
740 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
741 address i2c_entry,
742 address c2i_entry,
743 address c2i_unverified_entry,
744 address c2i_no_clinit_check_entry = nullptr);
745 static void create_native_wrapper(const methodHandle& method);
746 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
747
748 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
749 static void print_handler_on(outputStream* st, const CodeBlob* b);
750 static bool contains(const CodeBlob* b);
751 #ifndef PRODUCT
752 static void print_statistics();
753 #endif // PRODUCT
754
755 };
756
757 #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/signature.hpp"
35 #include "runtime/stubDeclarations.hpp"
36 #include "utilities/macros.hpp"
37
38 class AdapterHandlerEntry;
39 class AdapterFingerPrint;
40 class vframeStream;
41 class SigEntry;
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 // define SharedStubId enum tags: wrong_method_id, etc
50
51 #define SHARED_STUB_ID_ENUM_DECLARE(name, type) STUB_ID_NAME(name),
52 enum class SharedStubId :int {
53 NO_STUBID = -1,
54 SHARED_STUBS_DO(SHARED_STUB_ID_ENUM_DECLARE)
55 NUM_STUBIDS
56 };
57 #undef SHARED_STUB_ID_ENUM_DECLARE
58
59 class SharedRuntime: AllStatic {
60 friend class VMStructs;
61
352 // on top of the stack.
353 // The caller (or one of its callers) must use a ResourceMark
354 // in order to correctly free the result.
355 //
356 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
357
358 // Fill in the "X cannot be cast to a Y" message for ClassCastException
359 //
360 // @param caster_klass the class of the object we are casting
361 // @param target_klass the target klass attempt
362 // @return the dynamically allocated exception message (must be freed
363 // by the caller using a resource mark)
364 //
365 // This version does not require access the frame, so it can be called
366 // from interpreted code
367 // The caller (or one of it's callers) must use a ResourceMark
368 // in order to correctly free the result.
369 //
370 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr);
371
372 static char* generate_identity_exception_message(JavaThread* thr, Klass* klass);
373
374 // Resolves a call site- may patch in the destination of the call into the
375 // compiled code.
376 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, bool& caller_is_c1, TRAPS);
377
378 private:
379 // deopt blob
380 static void generate_deopt_blob(void);
381
382 static bool handle_ic_miss_helper_internal(Handle receiver, nmethod* caller_nm, const frame& caller_frame,
383 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
384 bool& needs_ic_stub_refill, bool& is_optimized, bool caller_is_c1, TRAPS);
385
386 public:
387 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
388
389 // Resets a call-site in compiled code so it will get resolved again.
390 static methodHandle reresolve_call_site(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, TRAPS);
391
392 // In the code prolog, if the klass comparison fails, the inline cache
393 // misses and the call site is patched to megamorphic
394 static methodHandle handle_ic_miss_helper(bool& is_optimized, bool& caller_is_c1, TRAPS);
395
396 // Find the method that called us.
397 static methodHandle find_callee_method(bool is_optimized, bool& caller_is_c1, TRAPS);
398
399 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
400
401 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
402
403 // Issue UL warning for unlocked JNI monitor on virtual thread termination
404 static void log_jni_monitor_still_held();
405
406 private:
407 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
408 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
409
410 static Method* extract_attached_method(vframeStream& vfst);
411
412 #if defined(X86) && defined(COMPILER1)
413 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
414 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
415 #endif // X86 && COMPILER1
416
417 public:
418
419 // Read the array of BasicTypes from a Java signature, and compute where
420 // compiled Java code would like to put the results. Values in reg_lo and
421 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
422 // registers, those above refer to 4-byte stack slots. All stack slots are
423 // based off of the window top. SharedInfo::stack0 refers to the first usable
424 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
425 // 4-bytes higher.
426 // return value is the maximum number of VMReg stack slots the convention will use.
427 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
428 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
429 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
430 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
431 return java_calling_convention(sig_bt, regs, total_args_passed);
432 }
433 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
434 static const uint java_return_convention_max_int;
435 static const uint java_return_convention_max_float;
436
437 static void check_member_name_argument_is_last_argument(const methodHandle& method,
438 const BasicType* sig_bt,
439 const VMRegPair* regs) NOT_DEBUG_RETURN;
440
441 // Ditto except for calling C
442 //
443 // C argument in register AND stack slot.
444 // Some architectures require that an argument must be passed in a register
445 // AND in a stack slot. These architectures provide a second VMRegPair array
446 // to be filled by the c_calling_convention method. On other architectures,
447 // null is being passed as the second VMRegPair array, so arguments are either
448 // passed in a register OR in a stack slot.
449 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
450
451 static int vector_calling_convention(VMRegPair *regs,
452 uint num_bits,
453 uint total_args_passed);
454
455 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
462 // by the time we reach the blob there is compiled code available. This allows
463 // the blob to pass the incoming stack pointer (the sender sp) in a known
464 // location for the interpreter to record. This is used by the frame code
465 // to correct the sender code to match up with the stack pointer when the
466 // thread left the compiled code. In addition it allows the interpreter
467 // to remove the space the c2i adapter allocated to do its argument conversion.
468
469 // Although a c2i blob will always run interpreted even if compiled code is
470 // present if we see that compiled code is present the compiled call site
471 // will be patched/re-resolved so that later calls will run compiled.
472
473 // Additionally a c2i blob need to have a unverified entry because it can be reached
474 // in situations where the call site is an inlined cache site and may go megamorphic.
475
476 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
477 // that the interpreter before it does any call dispatch will record the current
478 // stack pointer in the interpreter frame. On return it will restore the stack
479 // pointer as needed. This means the i2c adapter code doesn't need any special
480 // handshaking path with compiled code to keep the stack walking correct.
481
482 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm,
483 int comp_args_on_stack,
484 const GrowableArray<SigEntry>* sig,
485 const VMRegPair* regs,
486 const GrowableArray<SigEntry>* sig_cc,
487 const VMRegPair* regs_cc,
488 const GrowableArray<SigEntry>* sig_cc_ro,
489 const VMRegPair* regs_cc_ro,
490 AdapterFingerPrint* fingerprint,
491 AdapterBlob*& new_adapter,
492 bool allocate_code_blob);
493
494 static void gen_i2c_adapter(MacroAssembler *_masm,
495 int comp_args_on_stack,
496 const GrowableArray<SigEntry>* sig,
497 const VMRegPair *regs);
498
499 // OSR support
500
501 // OSR_migration_begin will extract the jvm state from an interpreter
502 // frame (locals, monitors) and store the data in a piece of C heap
503 // storage. This then allows the interpreter frame to be removed from the
504 // stack and the OSR nmethod to be called. That method is called with a
505 // pointer to the C heap storage. This pointer is the return value from
506 // OSR_migration_begin.
507
508 static intptr_t* OSR_migration_begin(JavaThread *thread);
509
510 // OSR_migration_end is a trivial routine. It is called after the compiled
511 // method has extracted the jvm state from the C heap that OSR_migration_begin
512 // created. It's entire job is to simply free this storage.
513 static void OSR_migration_end(intptr_t* buf);
514
515 // Convert a sig into a calling convention register layout
516 // and find interesting things about it.
545 //
546 // The wrapper may contain special-case code if the given method
547 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
548 static nmethod* generate_native_wrapper(MacroAssembler* masm,
549 const methodHandle& method,
550 int compile_id,
551 BasicType* sig_bt,
552 VMRegPair* regs,
553 BasicType ret_type);
554
555 // A compiled caller has just called the interpreter, but compiled code
556 // exists. Patch the caller so he no longer calls into the interpreter.
557 static void fixup_callers_callsite(Method* moop, address ret_pc);
558 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
559
560 // Slow-path Locking and Unlocking
561 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
562 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
563
564 // Resolving of calls
565 static address get_resolved_entry (JavaThread* current, methodHandle callee_method,
566 bool is_static_call, bool is_optimized, bool caller_is_c1);
567 static address resolve_static_call_C (JavaThread* current);
568 static address resolve_virtual_call_C (JavaThread* current);
569 static address resolve_opt_virtual_call_C(JavaThread* current);
570
571 static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res);
572 static void store_inline_type_fields_to_buf(JavaThread* current, intptr_t res);
573
574 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
575 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
576 oopDesc* dest, jint dest_pos,
577 jint length, JavaThread* thread);
578
579 // handle ic miss with caller being compiled code
580 // wrong method handling (inline cache misses)
581 static address handle_wrong_method(JavaThread* current);
582 static address handle_wrong_method_abstract(JavaThread* current);
583 static address handle_wrong_method_ic_miss(JavaThread* current);
584 static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver);
585 static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS);
586
587 static address handle_unsafe_access(JavaThread* thread, address next_pc);
588
589 static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* vk);
590 #ifndef PRODUCT
591
592 // Collect and print inline cache miss statistics
593 private:
594 enum { maxICmiss_count = 100 };
595 static int _ICmiss_index; // length of IC miss histogram
596 static int _ICmiss_count[maxICmiss_count]; // miss counts
597 static address _ICmiss_at[maxICmiss_count]; // miss addresses
598 static void trace_ic_miss(address at);
599
600 public:
601 static uint _ic_miss_ctr; // total # of IC misses
602 static uint _wrong_method_ctr;
603 static uint _resolve_static_ctr;
604 static uint _resolve_virtual_ctr;
605 static uint _resolve_opt_virtual_ctr;
606 static uint _implicit_null_throws;
607 static uint _implicit_div0_throws;
608
609 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy
678 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
679 // setup. Compiled frames are fixed-size and the args are likely not in the
680 // right place. Hence all the args will likely be copied into the
681 // interpreter's frame, forcing that frame to grow. The compiled frame's
682 // outgoing stack args will be dead after the copy.
683 //
684 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
685 // also perform an official frame push & pop. They have a call to the native
686 // routine in their middles and end in a return (instead of ending in a jump).
687 // The native wrappers are stored in real nmethods instead of the BufferBlobs
688 // used by the adapters. The code generation happens here because it's very
689 // similar to what the adapters have to do.
690
691 class AdapterHandlerEntry : public CHeapObj<mtCode> {
692 friend class AdapterHandlerLibrary;
693
694 private:
695 AdapterFingerPrint* _fingerprint;
696 address _i2c_entry;
697 address _c2i_entry;
698 address _c2i_inline_entry;
699 address _c2i_inline_ro_entry;
700 address _c2i_unverified_entry;
701 address _c2i_unverified_inline_entry;
702 address _c2i_no_clinit_check_entry;
703
704 // Support for scalarized inline type calling convention
705 const GrowableArray<SigEntry>* _sig_cc;
706
707 #ifdef ASSERT
708 // Captures code and signature used to generate this adapter when
709 // verifying adapter equivalence.
710 unsigned char* _saved_code;
711 int _saved_code_length;
712 #endif
713
714 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
715 address c2i_inline_entry, address c2i_inline_ro_entry,
716 address c2i_unverified_entry, address c2i_unverified_inline_entry,
717 address c2i_no_clinit_check_entry) :
718 _fingerprint(fingerprint),
719 _i2c_entry(i2c_entry),
720 _c2i_entry(c2i_entry),
721 _c2i_inline_entry(c2i_inline_entry),
722 _c2i_inline_ro_entry(c2i_inline_ro_entry),
723 _c2i_unverified_entry(c2i_unverified_entry),
724 _c2i_unverified_inline_entry(c2i_unverified_inline_entry),
725 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry),
726 _sig_cc(nullptr)
727 #ifdef ASSERT
728 , _saved_code_length(0)
729 #endif
730 { }
731
732 ~AdapterHandlerEntry();
733
734 public:
735 address get_i2c_entry() const { return _i2c_entry; }
736 address get_c2i_entry() const { return _c2i_entry; }
737 address get_c2i_inline_entry() const { return _c2i_inline_entry; }
738 address get_c2i_inline_ro_entry() const { return _c2i_inline_ro_entry; }
739 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
740 address get_c2i_unverified_inline_entry() const { return _c2i_unverified_inline_entry; }
741 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
742
743 address base_address();
744 void relocate(address new_base);
745
746 // Support for scalarized inline type calling convention
747 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; }
748 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; }
749
750 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
751
752 #ifdef ASSERT
753 // Used to verify that code generated for shared adapters is equivalent
754 void save_code (unsigned char* code, int length);
755 bool compare_code(AdapterHandlerEntry* other);
756 #endif
757
758 //virtual void print_on(outputStream* st) const; DO NOT USE
759 void print_adapter_on(outputStream* st) const;
760 };
761
762 class CompiledEntrySignature;
763
764 class AdapterHandlerLibrary: public AllStatic {
765 friend class SharedRuntime;
766 private:
767 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
768 static AdapterHandlerEntry* _abstract_method_handler;
769 static AdapterHandlerEntry* _no_arg_handler;
770 static AdapterHandlerEntry* _int_arg_handler;
771 static AdapterHandlerEntry* _obj_arg_handler;
772 static AdapterHandlerEntry* _obj_int_arg_handler;
773 static AdapterHandlerEntry* _obj_obj_arg_handler;
774
775 static BufferBlob* buffer_blob();
776 static void initialize();
777 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
778 CompiledEntrySignature& ces,
779 bool allocate_code_blob);
780 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
781 public:
782
783 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
784 address i2c_entry, address c2i_entry, address c2i_inline_entry, address c2i_inline_ro_entry,
785 address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry = nullptr);
786 static void create_native_wrapper(const methodHandle& method);
787 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
788
789 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
790 static void print_handler_on(outputStream* st, const CodeBlob* b);
791 static bool contains(const CodeBlob* b);
792 #ifndef PRODUCT
793 static void print_statistics();
794 #endif // PRODUCT
795
796 };
797
798 // Utility class for computing the calling convention of the 3 types
799 // of compiled method entries:
800 // Method::_from_compiled_entry - sig_cc
801 // Method::_from_compiled_inline_ro_entry - sig_cc_ro
802 // Method::_from_compiled_inline_entry - sig
803 class CompiledEntrySignature : public StackObj {
804 Method* _method;
805 int _num_inline_args;
806 bool _has_inline_recv;
807 GrowableArray<SigEntry>* _sig;
808 GrowableArray<SigEntry>* _sig_cc;
809 GrowableArray<SigEntry>* _sig_cc_ro;
810 VMRegPair* _regs;
811 VMRegPair* _regs_cc;
812 VMRegPair* _regs_cc_ro;
813
814 int _args_on_stack;
815 int _args_on_stack_cc;
816 int _args_on_stack_cc_ro;
817
818 bool _c1_needs_stack_repair;
819 bool _c2_needs_stack_repair;
820
821 GrowableArray<Method*>* _supers;
822
823 public:
824 Method* method() const { return _method; }
825
826 // Used by Method::_from_compiled_inline_entry
827 GrowableArray<SigEntry>* sig() const { return _sig; }
828
829 // Used by Method::_from_compiled_entry
830 GrowableArray<SigEntry>* sig_cc() const { return _sig_cc; }
831
832 // Used by Method::_from_compiled_inline_ro_entry
833 GrowableArray<SigEntry>* sig_cc_ro() const { return _sig_cc_ro; }
834
835 VMRegPair* regs() const { return _regs; }
836 VMRegPair* regs_cc() const { return _regs_cc; }
837 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; }
838
839 int args_on_stack() const { return _args_on_stack; }
840 int args_on_stack_cc() const { return _args_on_stack_cc; }
841 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; }
842
843 int num_inline_args() const { return _num_inline_args; }
844 bool has_inline_recv() const { return _has_inline_recv; }
845
846 bool has_scalarized_args() const { return _sig != _sig_cc; }
847 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; }
848 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; }
849 CodeOffsets::Entries c1_inline_ro_entry_type() const;
850
851 GrowableArray<Method*>* get_supers();
852
853 CompiledEntrySignature(Method* method = nullptr);
854 void compute_calling_conventions(bool init = true);
855 };
856
857 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP
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