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 private:
58 // Declare shared stub fields
347 // on top of the stack.
348 // The caller (or one of its callers) must use a ResourceMark
349 // in order to correctly free the result.
350 //
351 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
352
353 // Fill in the "X cannot be cast to a Y" message for ClassCastException
354 //
355 // @param caster_klass the class of the object we are casting
356 // @param target_klass the target klass attempt
357 // @return the dynamically allocated exception message (must be freed
358 // by the caller using a resource mark)
359 //
360 // This version does not require access the frame, so it can be called
361 // from interpreted code
362 // The caller (or one of it's callers) must use a ResourceMark
363 // in order to correctly free the result.
364 //
365 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr);
366
367 // Resolves a call site- may patch in the destination of the call into the
368 // compiled code.
369 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, TRAPS);
370
371 private:
372 // deopt blob
373 static void generate_deopt_blob(void);
374
375 static bool handle_ic_miss_helper_internal(Handle receiver, nmethod* caller_nm, const frame& caller_frame,
376 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
377 bool& needs_ic_stub_refill, TRAPS);
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 // Issue UL warning for unlocked JNI monitor on virtual thread termination
397 static void log_jni_monitor_still_held();
398
399 private:
400 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
401 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
402
403 static Method* extract_attached_method(vframeStream& vfst);
404
405 #if defined(X86) && defined(COMPILER1)
406 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
407 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
408 #endif // X86 && COMPILER1
409
410 public:
411
412 // Read the array of BasicTypes from a Java signature, and compute where
413 // compiled Java code would like to put the results. Values in reg_lo and
414 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
415 // registers, those above refer to 4-byte stack slots. All stack slots are
416 // based off of the window top. SharedInfo::stack0 refers to the first usable
417 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
418 // 4-bytes higher.
419 // return value is the maximum number of VMReg stack slots the convention will use.
420 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
421
422 static void check_member_name_argument_is_last_argument(const methodHandle& method,
423 const BasicType* sig_bt,
424 const VMRegPair* regs) NOT_DEBUG_RETURN;
425
426 // Ditto except for calling C
427 //
428 // C argument in register AND stack slot.
429 // Some architectures require that an argument must be passed in a register
430 // AND in a stack slot. These architectures provide a second VMRegPair array
431 // to be filled by the c_calling_convention method. On other architectures,
432 // null is being passed as the second VMRegPair array, so arguments are either
433 // passed in a register OR in a stack slot.
434 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
435
436 static int vector_calling_convention(VMRegPair *regs,
437 uint num_bits,
438 uint total_args_passed);
439
440 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
447 // by the time we reach the blob there is compiled code available. This allows
448 // the blob to pass the incoming stack pointer (the sender sp) in a known
449 // location for the interpreter to record. This is used by the frame code
450 // to correct the sender code to match up with the stack pointer when the
451 // thread left the compiled code. In addition it allows the interpreter
452 // to remove the space the c2i adapter allocated to do its argument conversion.
453
454 // Although a c2i blob will always run interpreted even if compiled code is
455 // present if we see that compiled code is present the compiled call site
456 // will be patched/re-resolved so that later calls will run compiled.
457
458 // Additionally a c2i blob need to have a unverified entry because it can be reached
459 // in situations where the call site is an inlined cache site and may go megamorphic.
460
461 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
462 // that the interpreter before it does any call dispatch will record the current
463 // stack pointer in the interpreter frame. On return it will restore the stack
464 // pointer as needed. This means the i2c adapter code doesn't need any special
465 // handshaking path with compiled code to keep the stack walking correct.
466
467 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
468 int total_args_passed,
469 int max_arg,
470 const BasicType *sig_bt,
471 const VMRegPair *regs,
472 AdapterFingerPrint* fingerprint);
473
474 static void gen_i2c_adapter(MacroAssembler *_masm,
475 int total_args_passed,
476 int comp_args_on_stack,
477 const BasicType *sig_bt,
478 const VMRegPair *regs);
479
480 // OSR support
481
482 // OSR_migration_begin will extract the jvm state from an interpreter
483 // frame (locals, monitors) and store the data in a piece of C heap
484 // storage. This then allows the interpreter frame to be removed from the
485 // stack and the OSR nmethod to be called. That method is called with a
486 // pointer to the C heap storage. This pointer is the return value from
487 // OSR_migration_begin.
488
489 static intptr_t* OSR_migration_begin(JavaThread *thread);
490
491 // OSR_migration_end is a trivial routine. It is called after the compiled
492 // method has extracted the jvm state from the C heap that OSR_migration_begin
493 // created. It's entire job is to simply free this storage.
494 static void OSR_migration_end(intptr_t* buf);
495
496 // Convert a sig into a calling convention register layout
497 // and find interesting things about it.
530 //
531 // The wrapper may contain special-case code if the given method
532 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
533 static nmethod* generate_native_wrapper(MacroAssembler* masm,
534 const methodHandle& method,
535 int compile_id,
536 BasicType* sig_bt,
537 VMRegPair* regs,
538 BasicType ret_type);
539
540 // A compiled caller has just called the interpreter, but compiled code
541 // exists. Patch the caller so he no longer calls into the interpreter.
542 static void fixup_callers_callsite(Method* moop, address ret_pc);
543 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
544
545 // Slow-path Locking and Unlocking
546 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
547 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
548
549 // Resolving of calls
550 static address get_resolved_entry (JavaThread* current, methodHandle callee_method);
551 static address resolve_static_call_C (JavaThread* current);
552 static address resolve_virtual_call_C (JavaThread* current);
553 static address resolve_opt_virtual_call_C(JavaThread* current);
554
555 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
556 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
557 oopDesc* dest, jint dest_pos,
558 jint length, JavaThread* thread);
559
560 // handle ic miss with caller being compiled code
561 // wrong method handling (inline cache misses)
562 static address handle_wrong_method(JavaThread* current);
563 static address handle_wrong_method_abstract(JavaThread* current);
564 static address handle_wrong_method_ic_miss(JavaThread* current);
565
566 static address handle_unsafe_access(JavaThread* thread, address next_pc);
567
568 #ifndef PRODUCT
569
570 // Collect and print inline cache miss statistics
571 private:
572 enum { maxICmiss_count = 100 };
573 static int _ICmiss_index; // length of IC miss histogram
574 static int _ICmiss_count[maxICmiss_count]; // miss counts
575 static address _ICmiss_at[maxICmiss_count]; // miss addresses
576 static void trace_ic_miss(address at);
577
578 public:
579 static uint _ic_miss_ctr; // total # of IC misses
580 static uint _wrong_method_ctr;
581 static uint _resolve_static_ctr;
582 static uint _resolve_virtual_ctr;
583 static uint _resolve_opt_virtual_ctr;
584 static uint _implicit_null_throws;
585 static uint _implicit_div0_throws;
586
587 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy
656 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
657 // setup. Compiled frames are fixed-size and the args are likely not in the
658 // right place. Hence all the args will likely be copied into the
659 // interpreter's frame, forcing that frame to grow. The compiled frame's
660 // outgoing stack args will be dead after the copy.
661 //
662 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
663 // also perform an official frame push & pop. They have a call to the native
664 // routine in their middles and end in a return (instead of ending in a jump).
665 // The native wrappers are stored in real nmethods instead of the BufferBlobs
666 // used by the adapters. The code generation happens here because it's very
667 // similar to what the adapters have to do.
668
669 class AdapterHandlerEntry : public CHeapObj<mtCode> {
670 friend class AdapterHandlerLibrary;
671
672 private:
673 AdapterFingerPrint* _fingerprint;
674 address _i2c_entry;
675 address _c2i_entry;
676 address _c2i_unverified_entry;
677 address _c2i_no_clinit_check_entry;
678
679 #ifdef ASSERT
680 // Captures code and signature used to generate this adapter when
681 // verifying adapter equivalence.
682 unsigned char* _saved_code;
683 int _saved_code_length;
684 #endif
685
686 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
687 address c2i_unverified_entry,
688 address c2i_no_clinit_check_entry) :
689 _fingerprint(fingerprint),
690 _i2c_entry(i2c_entry),
691 _c2i_entry(c2i_entry),
692 _c2i_unverified_entry(c2i_unverified_entry),
693 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry)
694 #ifdef ASSERT
695 , _saved_code_length(0)
696 #endif
697 { }
698
699 ~AdapterHandlerEntry();
700
701 public:
702 address get_i2c_entry() const { return _i2c_entry; }
703 address get_c2i_entry() const { return _c2i_entry; }
704 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
705 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
706
707 address base_address();
708 void relocate(address new_base);
709
710 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
711
712 #ifdef ASSERT
713 // Used to verify that code generated for shared adapters is equivalent
714 void save_code (unsigned char* code, int length);
715 bool compare_code(AdapterHandlerEntry* other);
716 #endif
717
718 //virtual void print_on(outputStream* st) const; DO NOT USE
719 void print_adapter_on(outputStream* st) const;
720 };
721
722 class AdapterHandlerLibrary: public AllStatic {
723 friend class SharedRuntime;
724 private:
725 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
726 static AdapterHandlerEntry* _abstract_method_handler;
727 static AdapterHandlerEntry* _no_arg_handler;
728 static AdapterHandlerEntry* _int_arg_handler;
729 static AdapterHandlerEntry* _obj_arg_handler;
730 static AdapterHandlerEntry* _obj_int_arg_handler;
731 static AdapterHandlerEntry* _obj_obj_arg_handler;
732
733 static BufferBlob* buffer_blob();
734 static void initialize();
735 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
736 int total_args_passed,
737 BasicType* sig_bt,
738 bool allocate_code_blob);
739 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
740 public:
741
742 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
743 address i2c_entry,
744 address c2i_entry,
745 address c2i_unverified_entry,
746 address c2i_no_clinit_check_entry = nullptr);
747 static void create_native_wrapper(const methodHandle& method);
748 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
749
750 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
751 static void print_handler_on(outputStream* st, const CodeBlob* b);
752 static bool contains(const CodeBlob* b);
753 #ifndef PRODUCT
754 static void print_statistics();
755 #endif // PRODUCT
756
757 };
758
759 #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 private:
61 // Declare shared stub fields
350 // on top of the stack.
351 // The caller (or one of its callers) must use a ResourceMark
352 // in order to correctly free the result.
353 //
354 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
355
356 // Fill in the "X cannot be cast to a Y" message for ClassCastException
357 //
358 // @param caster_klass the class of the object we are casting
359 // @param target_klass the target klass attempt
360 // @return the dynamically allocated exception message (must be freed
361 // by the caller using a resource mark)
362 //
363 // This version does not require access the frame, so it can be called
364 // from interpreted code
365 // The caller (or one of it's callers) must use a ResourceMark
366 // in order to correctly free the result.
367 //
368 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr);
369
370 static char* generate_identity_exception_message(JavaThread* thr, Klass* klass);
371
372 // Resolves a call site- may patch in the destination of the call into the
373 // compiled code.
374 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, bool& caller_is_c1, TRAPS);
375
376 private:
377 // deopt blob
378 static void generate_deopt_blob(void);
379
380 static bool handle_ic_miss_helper_internal(Handle receiver, nmethod* caller_nm, const frame& caller_frame,
381 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
382 bool& needs_ic_stub_refill, bool& is_optimized, bool caller_is_c1, TRAPS);
383
384 public:
385 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
386
387 // Resets a call-site in compiled code so it will get resolved again.
388 static methodHandle reresolve_call_site(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, TRAPS);
389
390 // In the code prolog, if the klass comparison fails, the inline cache
391 // misses and the call site is patched to megamorphic
392 static methodHandle handle_ic_miss_helper(bool& is_optimized, bool& caller_is_c1, TRAPS);
393
394 // Find the method that called us.
395 static methodHandle find_callee_method(bool is_optimized, bool& caller_is_c1, TRAPS);
396
397 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
398
399 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
400
401 // Issue UL warning for unlocked JNI monitor on virtual thread termination
402 static void log_jni_monitor_still_held();
403
404 private:
405 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
406 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
407
408 static Method* extract_attached_method(vframeStream& vfst);
409
410 #if defined(X86) && defined(COMPILER1)
411 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
412 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
413 #endif // X86 && COMPILER1
414
415 public:
416
417 // Read the array of BasicTypes from a Java signature, and compute where
418 // compiled Java code would like to put the results. Values in reg_lo and
419 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
420 // registers, those above refer to 4-byte stack slots. All stack slots are
421 // based off of the window top. SharedInfo::stack0 refers to the first usable
422 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
423 // 4-bytes higher.
424 // return value is the maximum number of VMReg stack slots the convention will use.
425 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
426 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
427 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
428 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
429 return java_calling_convention(sig_bt, regs, total_args_passed);
430 }
431 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
432 static const uint java_return_convention_max_int;
433 static const uint java_return_convention_max_float;
434
435 static void check_member_name_argument_is_last_argument(const methodHandle& method,
436 const BasicType* sig_bt,
437 const VMRegPair* regs) NOT_DEBUG_RETURN;
438
439 // Ditto except for calling C
440 //
441 // C argument in register AND stack slot.
442 // Some architectures require that an argument must be passed in a register
443 // AND in a stack slot. These architectures provide a second VMRegPair array
444 // to be filled by the c_calling_convention method. On other architectures,
445 // null is being passed as the second VMRegPair array, so arguments are either
446 // passed in a register OR in a stack slot.
447 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
448
449 static int vector_calling_convention(VMRegPair *regs,
450 uint num_bits,
451 uint total_args_passed);
452
453 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
460 // by the time we reach the blob there is compiled code available. This allows
461 // the blob to pass the incoming stack pointer (the sender sp) in a known
462 // location for the interpreter to record. This is used by the frame code
463 // to correct the sender code to match up with the stack pointer when the
464 // thread left the compiled code. In addition it allows the interpreter
465 // to remove the space the c2i adapter allocated to do its argument conversion.
466
467 // Although a c2i blob will always run interpreted even if compiled code is
468 // present if we see that compiled code is present the compiled call site
469 // will be patched/re-resolved so that later calls will run compiled.
470
471 // Additionally a c2i blob need to have a unverified entry because it can be reached
472 // in situations where the call site is an inlined cache site and may go megamorphic.
473
474 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
475 // that the interpreter before it does any call dispatch will record the current
476 // stack pointer in the interpreter frame. On return it will restore the stack
477 // pointer as needed. This means the i2c adapter code doesn't need any special
478 // handshaking path with compiled code to keep the stack walking correct.
479
480 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm,
481 int comp_args_on_stack,
482 const GrowableArray<SigEntry>* sig,
483 const VMRegPair* regs,
484 const GrowableArray<SigEntry>* sig_cc,
485 const VMRegPair* regs_cc,
486 const GrowableArray<SigEntry>* sig_cc_ro,
487 const VMRegPair* regs_cc_ro,
488 AdapterFingerPrint* fingerprint,
489 AdapterBlob*& new_adapter,
490 bool allocate_code_blob);
491
492 static void gen_i2c_adapter(MacroAssembler *_masm,
493 int comp_args_on_stack,
494 const GrowableArray<SigEntry>* sig,
495 const VMRegPair *regs);
496
497 // OSR support
498
499 // OSR_migration_begin will extract the jvm state from an interpreter
500 // frame (locals, monitors) and store the data in a piece of C heap
501 // storage. This then allows the interpreter frame to be removed from the
502 // stack and the OSR nmethod to be called. That method is called with a
503 // pointer to the C heap storage. This pointer is the return value from
504 // OSR_migration_begin.
505
506 static intptr_t* OSR_migration_begin(JavaThread *thread);
507
508 // OSR_migration_end is a trivial routine. It is called after the compiled
509 // method has extracted the jvm state from the C heap that OSR_migration_begin
510 // created. It's entire job is to simply free this storage.
511 static void OSR_migration_end(intptr_t* buf);
512
513 // Convert a sig into a calling convention register layout
514 // and find interesting things about it.
547 //
548 // The wrapper may contain special-case code if the given method
549 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
550 static nmethod* generate_native_wrapper(MacroAssembler* masm,
551 const methodHandle& method,
552 int compile_id,
553 BasicType* sig_bt,
554 VMRegPair* regs,
555 BasicType ret_type);
556
557 // A compiled caller has just called the interpreter, but compiled code
558 // exists. Patch the caller so he no longer calls into the interpreter.
559 static void fixup_callers_callsite(Method* moop, address ret_pc);
560 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
561
562 // Slow-path Locking and Unlocking
563 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
564 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
565
566 // Resolving of calls
567 static address get_resolved_entry (JavaThread* current, methodHandle callee_method,
568 bool is_static_call, bool is_optimized, bool caller_is_c1);
569 static address resolve_static_call_C (JavaThread* current);
570 static address resolve_virtual_call_C (JavaThread* current);
571 static address resolve_opt_virtual_call_C(JavaThread* current);
572
573 static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res);
574 static void store_inline_type_fields_to_buf(JavaThread* current, intptr_t res);
575
576 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
577 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
578 oopDesc* dest, jint dest_pos,
579 jint length, JavaThread* thread);
580
581 // handle ic miss with caller being compiled code
582 // wrong method handling (inline cache misses)
583 static address handle_wrong_method(JavaThread* current);
584 static address handle_wrong_method_abstract(JavaThread* current);
585 static address handle_wrong_method_ic_miss(JavaThread* current);
586 static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver);
587 static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS);
588
589 static address handle_unsafe_access(JavaThread* thread, address next_pc);
590
591 static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* vk);
592 #ifndef PRODUCT
593
594 // Collect and print inline cache miss statistics
595 private:
596 enum { maxICmiss_count = 100 };
597 static int _ICmiss_index; // length of IC miss histogram
598 static int _ICmiss_count[maxICmiss_count]; // miss counts
599 static address _ICmiss_at[maxICmiss_count]; // miss addresses
600 static void trace_ic_miss(address at);
601
602 public:
603 static uint _ic_miss_ctr; // total # of IC misses
604 static uint _wrong_method_ctr;
605 static uint _resolve_static_ctr;
606 static uint _resolve_virtual_ctr;
607 static uint _resolve_opt_virtual_ctr;
608 static uint _implicit_null_throws;
609 static uint _implicit_div0_throws;
610
611 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy
680 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
681 // setup. Compiled frames are fixed-size and the args are likely not in the
682 // right place. Hence all the args will likely be copied into the
683 // interpreter's frame, forcing that frame to grow. The compiled frame's
684 // outgoing stack args will be dead after the copy.
685 //
686 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
687 // also perform an official frame push & pop. They have a call to the native
688 // routine in their middles and end in a return (instead of ending in a jump).
689 // The native wrappers are stored in real nmethods instead of the BufferBlobs
690 // used by the adapters. The code generation happens here because it's very
691 // similar to what the adapters have to do.
692
693 class AdapterHandlerEntry : public CHeapObj<mtCode> {
694 friend class AdapterHandlerLibrary;
695
696 private:
697 AdapterFingerPrint* _fingerprint;
698 address _i2c_entry;
699 address _c2i_entry;
700 address _c2i_inline_entry;
701 address _c2i_inline_ro_entry;
702 address _c2i_unverified_entry;
703 address _c2i_unverified_inline_entry;
704 address _c2i_no_clinit_check_entry;
705
706 // Support for scalarized inline type calling convention
707 const GrowableArray<SigEntry>* _sig_cc;
708
709 #ifdef ASSERT
710 // Captures code and signature used to generate this adapter when
711 // verifying adapter equivalence.
712 unsigned char* _saved_code;
713 int _saved_code_length;
714 #endif
715
716 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
717 address c2i_inline_entry, address c2i_inline_ro_entry,
718 address c2i_unverified_entry, address c2i_unverified_inline_entry,
719 address c2i_no_clinit_check_entry) :
720 _fingerprint(fingerprint),
721 _i2c_entry(i2c_entry),
722 _c2i_entry(c2i_entry),
723 _c2i_inline_entry(c2i_inline_entry),
724 _c2i_inline_ro_entry(c2i_inline_ro_entry),
725 _c2i_unverified_entry(c2i_unverified_entry),
726 _c2i_unverified_inline_entry(c2i_unverified_inline_entry),
727 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry),
728 _sig_cc(nullptr)
729 #ifdef ASSERT
730 , _saved_code_length(0)
731 #endif
732 { }
733
734 ~AdapterHandlerEntry();
735
736 public:
737 address get_i2c_entry() const { return _i2c_entry; }
738 address get_c2i_entry() const { return _c2i_entry; }
739 address get_c2i_inline_entry() const { return _c2i_inline_entry; }
740 address get_c2i_inline_ro_entry() const { return _c2i_inline_ro_entry; }
741 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
742 address get_c2i_unverified_inline_entry() const { return _c2i_unverified_inline_entry; }
743 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
744
745 address base_address();
746 void relocate(address new_base);
747
748 // Support for scalarized inline type calling convention
749 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; }
750 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; }
751
752 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
753
754 #ifdef ASSERT
755 // Used to verify that code generated for shared adapters is equivalent
756 void save_code (unsigned char* code, int length);
757 bool compare_code(AdapterHandlerEntry* other);
758 #endif
759
760 //virtual void print_on(outputStream* st) const; DO NOT USE
761 void print_adapter_on(outputStream* st) const;
762 };
763
764 class CompiledEntrySignature;
765
766 class AdapterHandlerLibrary: public AllStatic {
767 friend class SharedRuntime;
768 private:
769 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
770 static AdapterHandlerEntry* _abstract_method_handler;
771 static AdapterHandlerEntry* _no_arg_handler;
772 static AdapterHandlerEntry* _int_arg_handler;
773 static AdapterHandlerEntry* _obj_arg_handler;
774 static AdapterHandlerEntry* _obj_int_arg_handler;
775 static AdapterHandlerEntry* _obj_obj_arg_handler;
776
777 static BufferBlob* buffer_blob();
778 static void initialize();
779 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
780 CompiledEntrySignature& ces,
781 bool allocate_code_blob);
782 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
783 public:
784
785 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
786 address i2c_entry, address c2i_entry, address c2i_inline_entry, address c2i_inline_ro_entry,
787 address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry = nullptr);
788 static void create_native_wrapper(const methodHandle& method);
789 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
790
791 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
792 static void print_handler_on(outputStream* st, const CodeBlob* b);
793 static bool contains(const CodeBlob* b);
794 #ifndef PRODUCT
795 static void print_statistics();
796 #endif // PRODUCT
797
798 };
799
800 // Utility class for computing the calling convention of the 3 types
801 // of compiled method entries:
802 // Method::_from_compiled_entry - sig_cc
803 // Method::_from_compiled_inline_ro_entry - sig_cc_ro
804 // Method::_from_compiled_inline_entry - sig
805 class CompiledEntrySignature : public StackObj {
806 Method* _method;
807 int _num_inline_args;
808 bool _has_inline_recv;
809 GrowableArray<SigEntry>* _sig;
810 GrowableArray<SigEntry>* _sig_cc;
811 GrowableArray<SigEntry>* _sig_cc_ro;
812 VMRegPair* _regs;
813 VMRegPair* _regs_cc;
814 VMRegPair* _regs_cc_ro;
815
816 int _args_on_stack;
817 int _args_on_stack_cc;
818 int _args_on_stack_cc_ro;
819
820 bool _c1_needs_stack_repair;
821 bool _c2_needs_stack_repair;
822
823 GrowableArray<Method*>* _supers;
824
825 public:
826 Method* method() const { return _method; }
827
828 // Used by Method::_from_compiled_inline_entry
829 GrowableArray<SigEntry>* sig() const { return _sig; }
830
831 // Used by Method::_from_compiled_entry
832 GrowableArray<SigEntry>* sig_cc() const { return _sig_cc; }
833
834 // Used by Method::_from_compiled_inline_ro_entry
835 GrowableArray<SigEntry>* sig_cc_ro() const { return _sig_cc_ro; }
836
837 VMRegPair* regs() const { return _regs; }
838 VMRegPair* regs_cc() const { return _regs_cc; }
839 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; }
840
841 int args_on_stack() const { return _args_on_stack; }
842 int args_on_stack_cc() const { return _args_on_stack_cc; }
843 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; }
844
845 int num_inline_args() const { return _num_inline_args; }
846 bool has_inline_recv() const { return _has_inline_recv; }
847
848 bool has_scalarized_args() const { return _sig != _sig_cc; }
849 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; }
850 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; }
851 CodeOffsets::Entries c1_inline_ro_entry_type() const;
852
853 GrowableArray<Method*>* get_supers();
854
855 CompiledEntrySignature(Method* method = nullptr);
856 void compute_calling_conventions(bool init = true);
857 };
858
859 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP
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