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 "utilities/macros.hpp"
34
35 class AdapterHandlerEntry;
36 class AdapterFingerPrint;
37 class vframeStream;
38
39 // Runtime is the base class for various runtime interfaces
40 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
41 // shared functionality such as exception forwarding (C++ to
42 // Java exceptions), locking/unlocking mechanisms, statistical
43 // information, etc.
44
45 class SharedRuntime: AllStatic {
46 friend class VMStructs;
47
48 private:
49 static methodHandle resolve_sub_helper(bool is_virtual, bool is_optimized, TRAPS);
50
51 // Shared stub locations
52
53 static RuntimeStub* _wrong_method_blob;
54 static RuntimeStub* _wrong_method_abstract_blob;
55 static RuntimeStub* _ic_miss_blob;
56 static RuntimeStub* _resolve_opt_virtual_call_blob;
57 static RuntimeStub* _resolve_virtual_call_blob;
58 static RuntimeStub* _resolve_static_call_blob;
59 static address _resolve_static_call_entry;
60
61 static DeoptimizationBlob* _deopt_blob;
62
63 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
64 static SafepointBlob* _polling_page_safepoint_handler_blob;
65 static SafepointBlob* _polling_page_return_handler_blob;
66
67 #ifdef COMPILER2
68 static UncommonTrapBlob* _uncommon_trap_blob;
69 #endif // COMPILER2
70
71 static nmethod* _cont_doYield_stub;
72
73 #ifndef PRODUCT
74 // Counters
75 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
76 #endif // !PRODUCT
77
78 private:
79 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
80 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
81 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
82
83 public:
84 static void generate_stubs(void);
85
86 // max bytes for each dtrace string parameter
87 enum { max_dtrace_string_size = 256 };
88
89 // The following arithmetic routines are used on platforms that do
90 // not have machine instructions to implement their functionality.
91 // Do not remove these.
92
93 // long arithmetics
94 static jlong lmul(jlong y, jlong x);
95 static jlong ldiv(jlong y, jlong x);
96 static jlong lrem(jlong y, jlong x);
97
98 // float and double remainder
99 static jfloat frem(jfloat x, jfloat y);
100 static jdouble drem(jdouble x, jdouble y);
101
102
303 // on top of the stack.
304 // The caller (or one of its callers) must use a ResourceMark
305 // in order to correctly free the result.
306 //
307 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
308
309 // Fill in the "X cannot be cast to a Y" message for ClassCastException
310 //
311 // @param caster_klass the class of the object we are casting
312 // @param target_klass the target klass attempt
313 // @return the dynamically allocated exception message (must be freed
314 // by the caller using a resource mark)
315 //
316 // This version does not require access the frame, so it can be called
317 // from interpreted code
318 // The caller (or one of it's callers) must use a ResourceMark
319 // in order to correctly free the result.
320 //
321 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr);
322
323 // Resolves a call site- may patch in the destination of the call into the
324 // compiled code.
325 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, TRAPS);
326
327 private:
328 // deopt blob
329 static void generate_deopt_blob(void);
330
331 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
332 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
333 bool& needs_ic_stub_refill, TRAPS);
334
335 public:
336 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
337
338 // Resets a call-site in compiled code so it will get resolved again.
339 static methodHandle reresolve_call_site(TRAPS);
340
341 // In the code prolog, if the klass comparison fails, the inline cache
342 // misses and the call site is patched to megamorphic
343 static methodHandle handle_ic_miss_helper(TRAPS);
344
345 // Find the method that called us.
346 static methodHandle find_callee_method(TRAPS);
347
348 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
349
350 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
351
352 private:
353 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
354 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
355
356 static Method* extract_attached_method(vframeStream& vfst);
357
358 #if defined(X86) && defined(COMPILER1)
359 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
360 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
361 #endif // X86 && COMPILER1
362
363 public:
364
365 // Read the array of BasicTypes from a Java signature, and compute where
366 // compiled Java code would like to put the results. Values in reg_lo and
367 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
368 // registers, those above refer to 4-byte stack slots. All stack slots are
369 // based off of the window top. SharedInfo::stack0 refers to the first usable
370 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
371 // 4-bytes higher.
372 // return value is the maximum number of VMReg stack slots the convention will use.
373 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
374
375 static void check_member_name_argument_is_last_argument(const methodHandle& method,
376 const BasicType* sig_bt,
377 const VMRegPair* regs) NOT_DEBUG_RETURN;
378
379 // Ditto except for calling C
380 //
381 // C argument in register AND stack slot.
382 // Some architectures require that an argument must be passed in a register
383 // AND in a stack slot. These architectures provide a second VMRegPair array
384 // to be filled by the c_calling_convention method. On other architectures,
385 // null is being passed as the second VMRegPair array, so arguments are either
386 // passed in a register OR in a stack slot.
387 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
388
389 static int vector_calling_convention(VMRegPair *regs,
390 uint num_bits,
391 uint total_args_passed);
392
393 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
400 // by the time we reach the blob there is compiled code available. This allows
401 // the blob to pass the incoming stack pointer (the sender sp) in a known
402 // location for the interpreter to record. This is used by the frame code
403 // to correct the sender code to match up with the stack pointer when the
404 // thread left the compiled code. In addition it allows the interpreter
405 // to remove the space the c2i adapter allocated to do its argument conversion.
406
407 // Although a c2i blob will always run interpreted even if compiled code is
408 // present if we see that compiled code is present the compiled call site
409 // will be patched/re-resolved so that later calls will run compiled.
410
411 // Additionally a c2i blob need to have a unverified entry because it can be reached
412 // in situations where the call site is an inlined cache site and may go megamorphic.
413
414 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
415 // that the interpreter before it does any call dispatch will record the current
416 // stack pointer in the interpreter frame. On return it will restore the stack
417 // pointer as needed. This means the i2c adapter code doesn't need any special
418 // handshaking path with compiled code to keep the stack walking correct.
419
420 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
421 int total_args_passed,
422 int max_arg,
423 const BasicType *sig_bt,
424 const VMRegPair *regs,
425 AdapterFingerPrint* fingerprint);
426
427 static void gen_i2c_adapter(MacroAssembler *_masm,
428 int total_args_passed,
429 int comp_args_on_stack,
430 const BasicType *sig_bt,
431 const VMRegPair *regs);
432
433 // OSR support
434
435 // OSR_migration_begin will extract the jvm state from an interpreter
436 // frame (locals, monitors) and store the data in a piece of C heap
437 // storage. This then allows the interpreter frame to be removed from the
438 // stack and the OSR nmethod to be called. That method is called with a
439 // pointer to the C heap storage. This pointer is the return value from
440 // OSR_migration_begin.
441
442 static intptr_t* OSR_migration_begin(JavaThread *thread);
443
444 // OSR_migration_end is a trivial routine. It is called after the compiled
445 // method has extracted the jvm state from the C heap that OSR_migration_begin
446 // created. It's entire job is to simply free this storage.
447 static void OSR_migration_end(intptr_t* buf);
448
449 // Convert a sig into a calling convention register layout
450 // and find interesting things about it.
483 const methodHandle& method,
484 int compile_id,
485 BasicType* sig_bt,
486 VMRegPair* regs,
487 BasicType ret_type);
488
489 // A compiled caller has just called the interpreter, but compiled code
490 // exists. Patch the caller so he no longer calls into the interpreter.
491 static void fixup_callers_callsite(Method* moop, address ret_pc);
492 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
493
494 // Slow-path Locking and Unlocking
495 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
496 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
497
498 // Resolving of calls
499 static address resolve_static_call_C (JavaThread* current);
500 static address resolve_virtual_call_C (JavaThread* current);
501 static address resolve_opt_virtual_call_C(JavaThread* current);
502
503 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
504 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
505 oopDesc* dest, jint dest_pos,
506 jint length, JavaThread* thread);
507
508 // handle ic miss with caller being compiled code
509 // wrong method handling (inline cache misses)
510 static address handle_wrong_method(JavaThread* current);
511 static address handle_wrong_method_abstract(JavaThread* current);
512 static address handle_wrong_method_ic_miss(JavaThread* current);
513
514 static address handle_unsafe_access(JavaThread* thread, address next_pc);
515
516 #ifndef PRODUCT
517
518 // Collect and print inline cache miss statistics
519 private:
520 enum { maxICmiss_count = 100 };
521 static int _ICmiss_index; // length of IC miss histogram
522 static int _ICmiss_count[maxICmiss_count]; // miss counts
523 static address _ICmiss_at[maxICmiss_count]; // miss addresses
524 static void trace_ic_miss(address at);
525
526 public:
527 static uint _ic_miss_ctr; // total # of IC misses
528 static uint _wrong_method_ctr;
529 static uint _resolve_static_ctr;
530 static uint _resolve_virtual_ctr;
531 static uint _resolve_opt_virtual_ctr;
532 static uint _implicit_null_throws;
533 static uint _implicit_div0_throws;
534
535 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy
602 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
603 // setup. Compiled frames are fixed-size and the args are likely not in the
604 // right place. Hence all the args will likely be copied into the
605 // interpreter's frame, forcing that frame to grow. The compiled frame's
606 // outgoing stack args will be dead after the copy.
607 //
608 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
609 // also perform an official frame push & pop. They have a call to the native
610 // routine in their middles and end in a return (instead of ending in a jump).
611 // The native wrappers are stored in real nmethods instead of the BufferBlobs
612 // used by the adapters. The code generation happens here because it's very
613 // similar to what the adapters have to do.
614
615 class AdapterHandlerEntry : public CHeapObj<mtCode> {
616 friend class AdapterHandlerLibrary;
617
618 private:
619 AdapterFingerPrint* _fingerprint;
620 address _i2c_entry;
621 address _c2i_entry;
622 address _c2i_unverified_entry;
623 address _c2i_no_clinit_check_entry;
624
625 #ifdef ASSERT
626 // Captures code and signature used to generate this adapter when
627 // verifying adapter equivalence.
628 unsigned char* _saved_code;
629 int _saved_code_length;
630 #endif
631
632 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
633 address c2i_unverified_entry,
634 address c2i_no_clinit_check_entry) :
635 _fingerprint(fingerprint),
636 _i2c_entry(i2c_entry),
637 _c2i_entry(c2i_entry),
638 _c2i_unverified_entry(c2i_unverified_entry),
639 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry)
640 #ifdef ASSERT
641 , _saved_code_length(0)
642 #endif
643 { }
644
645 ~AdapterHandlerEntry();
646
647 public:
648 address get_i2c_entry() const { return _i2c_entry; }
649 address get_c2i_entry() const { return _c2i_entry; }
650 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
651 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
652
653 address base_address();
654 void relocate(address new_base);
655
656 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
657
658 #ifdef ASSERT
659 // Used to verify that code generated for shared adapters is equivalent
660 void save_code (unsigned char* code, int length);
661 bool compare_code(AdapterHandlerEntry* other);
662 #endif
663
664 //virtual void print_on(outputStream* st) const; DO NOT USE
665 void print_adapter_on(outputStream* st) const;
666 };
667
668 class AdapterHandlerLibrary: public AllStatic {
669 friend class SharedRuntime;
670 private:
671 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
672 static AdapterHandlerEntry* _abstract_method_handler;
673 static AdapterHandlerEntry* _no_arg_handler;
674 static AdapterHandlerEntry* _int_arg_handler;
675 static AdapterHandlerEntry* _obj_arg_handler;
676 static AdapterHandlerEntry* _obj_int_arg_handler;
677 static AdapterHandlerEntry* _obj_obj_arg_handler;
678
679 static BufferBlob* buffer_blob();
680 static void initialize();
681 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
682 int total_args_passed,
683 BasicType* sig_bt,
684 bool allocate_code_blob);
685 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
686 public:
687
688 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
689 address i2c_entry,
690 address c2i_entry,
691 address c2i_unverified_entry,
692 address c2i_no_clinit_check_entry = nullptr);
693 static void create_native_wrapper(const methodHandle& method);
694 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
695
696 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
697 static void print_handler_on(outputStream* st, const CodeBlob* b);
698 static bool contains(const CodeBlob* b);
699 #ifndef PRODUCT
700 static void print_statistics();
701 #endif // PRODUCT
702
703 };
704
705 #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 "utilities/macros.hpp"
36
37 class AdapterHandlerEntry;
38 class AdapterFingerPrint;
39 class vframeStream;
40 class SigEntry;
41
42 // Runtime is the base class for various runtime interfaces
43 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
44 // shared functionality such as exception forwarding (C++ to
45 // Java exceptions), locking/unlocking mechanisms, statistical
46 // information, etc.
47
48 class SharedRuntime: AllStatic {
49 friend class VMStructs;
50
51 private:
52 // Shared stub locations
53
54 static RuntimeStub* _wrong_method_blob;
55 static RuntimeStub* _wrong_method_abstract_blob;
56 static RuntimeStub* _ic_miss_blob;
57 static RuntimeStub* _resolve_opt_virtual_call_blob;
58 static RuntimeStub* _resolve_virtual_call_blob;
59 static RuntimeStub* _resolve_static_call_blob;
60
61 static DeoptimizationBlob* _deopt_blob;
62
63 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
64 static SafepointBlob* _polling_page_safepoint_handler_blob;
65 static SafepointBlob* _polling_page_return_handler_blob;
66
67 #ifdef COMPILER2
68 static UncommonTrapBlob* _uncommon_trap_blob;
69 #endif // COMPILER2
70
71 static nmethod* _cont_doYield_stub;
72
73 #ifndef PRODUCT
74 // Counters
75 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
76 #endif // !PRODUCT
77
78 private:
79 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
80 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
81 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
82 public:
83 static void generate_stubs(void);
84
85 // max bytes for each dtrace string parameter
86 enum { max_dtrace_string_size = 256 };
87
88 // The following arithmetic routines are used on platforms that do
89 // not have machine instructions to implement their functionality.
90 // Do not remove these.
91
92 // long arithmetics
93 static jlong lmul(jlong y, jlong x);
94 static jlong ldiv(jlong y, jlong x);
95 static jlong lrem(jlong y, jlong x);
96
97 // float and double remainder
98 static jfloat frem(jfloat x, jfloat y);
99 static jdouble drem(jdouble x, jdouble y);
100
101
302 // on top of the stack.
303 // The caller (or one of its callers) must use a ResourceMark
304 // in order to correctly free the result.
305 //
306 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
307
308 // Fill in the "X cannot be cast to a Y" message for ClassCastException
309 //
310 // @param caster_klass the class of the object we are casting
311 // @param target_klass the target klass attempt
312 // @return the dynamically allocated exception message (must be freed
313 // by the caller using a resource mark)
314 //
315 // This version does not require access the frame, so it can be called
316 // from interpreted code
317 // The caller (or one of it's callers) must use a ResourceMark
318 // in order to correctly free the result.
319 //
320 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr);
321
322 static char* generate_identity_exception_message(JavaThread* thr, Klass* klass);
323
324 // Resolves a call site- may patch in the destination of the call into the
325 // compiled code.
326 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, bool& caller_is_c1, TRAPS);
327
328 private:
329 // deopt blob
330 static void generate_deopt_blob(void);
331
332 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
333 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
334 bool& needs_ic_stub_refill, bool& is_optimized, bool caller_is_c1, TRAPS);
335
336 public:
337 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
338
339 // Resets a call-site in compiled code so it will get resolved again.
340 static methodHandle reresolve_call_site(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, TRAPS);
341
342 // In the code prolog, if the klass comparison fails, the inline cache
343 // misses and the call site is patched to megamorphic
344 static methodHandle handle_ic_miss_helper(bool& is_optimized, bool& caller_is_c1, TRAPS);
345
346 // Find the method that called us.
347 static methodHandle find_callee_method(bool is_optimized, bool& caller_is_c1, TRAPS);
348
349 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
350
351 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
352
353 static address entry_for_handle_wrong_method(methodHandle callee_method, bool is_static_call, bool is_optimized, bool caller_is_c1) {
354 assert(callee_method->verified_code_entry() != nullptr, "Jump to zero!");
355 assert(callee_method->verified_inline_code_entry() != nullptr, "Jump to zero!");
356 assert(callee_method->verified_inline_ro_code_entry() != nullptr, "Jump to zero!");
357 if (caller_is_c1) {
358 return callee_method->verified_inline_code_entry();
359 } else if (is_static_call || is_optimized) {
360 return callee_method->verified_code_entry();
361 } else {
362 return callee_method->verified_inline_ro_code_entry();
363 }
364 }
365
366 private:
367 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
368 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
369
370 static Method* extract_attached_method(vframeStream& vfst);
371
372 #if defined(X86) && defined(COMPILER1)
373 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
374 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
375 #endif // X86 && COMPILER1
376
377 public:
378
379 // Read the array of BasicTypes from a Java signature, and compute where
380 // compiled Java code would like to put the results. Values in reg_lo and
381 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
382 // registers, those above refer to 4-byte stack slots. All stack slots are
383 // based off of the window top. SharedInfo::stack0 refers to the first usable
384 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
385 // 4-bytes higher.
386 // return value is the maximum number of VMReg stack slots the convention will use.
387 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
388 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
389 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
390 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
391 return java_calling_convention(sig_bt, regs, total_args_passed);
392 }
393 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
394 static const uint java_return_convention_max_int;
395 static const uint java_return_convention_max_float;
396
397 static void check_member_name_argument_is_last_argument(const methodHandle& method,
398 const BasicType* sig_bt,
399 const VMRegPair* regs) NOT_DEBUG_RETURN;
400
401 // Ditto except for calling C
402 //
403 // C argument in register AND stack slot.
404 // Some architectures require that an argument must be passed in a register
405 // AND in a stack slot. These architectures provide a second VMRegPair array
406 // to be filled by the c_calling_convention method. On other architectures,
407 // null is being passed as the second VMRegPair array, so arguments are either
408 // passed in a register OR in a stack slot.
409 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
410
411 static int vector_calling_convention(VMRegPair *regs,
412 uint num_bits,
413 uint total_args_passed);
414
415 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
422 // by the time we reach the blob there is compiled code available. This allows
423 // the blob to pass the incoming stack pointer (the sender sp) in a known
424 // location for the interpreter to record. This is used by the frame code
425 // to correct the sender code to match up with the stack pointer when the
426 // thread left the compiled code. In addition it allows the interpreter
427 // to remove the space the c2i adapter allocated to do its argument conversion.
428
429 // Although a c2i blob will always run interpreted even if compiled code is
430 // present if we see that compiled code is present the compiled call site
431 // will be patched/re-resolved so that later calls will run compiled.
432
433 // Additionally a c2i blob need to have a unverified entry because it can be reached
434 // in situations where the call site is an inlined cache site and may go megamorphic.
435
436 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
437 // that the interpreter before it does any call dispatch will record the current
438 // stack pointer in the interpreter frame. On return it will restore the stack
439 // pointer as needed. This means the i2c adapter code doesn't need any special
440 // handshaking path with compiled code to keep the stack walking correct.
441
442 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm,
443 int comp_args_on_stack,
444 const GrowableArray<SigEntry>* sig,
445 const VMRegPair* regs,
446 const GrowableArray<SigEntry>* sig_cc,
447 const VMRegPair* regs_cc,
448 const GrowableArray<SigEntry>* sig_cc_ro,
449 const VMRegPair* regs_cc_ro,
450 AdapterFingerPrint* fingerprint,
451 AdapterBlob*& new_adapter,
452 bool allocate_code_blob);
453
454 static void gen_i2c_adapter(MacroAssembler *_masm,
455 int comp_args_on_stack,
456 const GrowableArray<SigEntry>* sig,
457 const VMRegPair *regs);
458
459 // OSR support
460
461 // OSR_migration_begin will extract the jvm state from an interpreter
462 // frame (locals, monitors) and store the data in a piece of C heap
463 // storage. This then allows the interpreter frame to be removed from the
464 // stack and the OSR nmethod to be called. That method is called with a
465 // pointer to the C heap storage. This pointer is the return value from
466 // OSR_migration_begin.
467
468 static intptr_t* OSR_migration_begin(JavaThread *thread);
469
470 // OSR_migration_end is a trivial routine. It is called after the compiled
471 // method has extracted the jvm state from the C heap that OSR_migration_begin
472 // created. It's entire job is to simply free this storage.
473 static void OSR_migration_end(intptr_t* buf);
474
475 // Convert a sig into a calling convention register layout
476 // and find interesting things about it.
509 const methodHandle& method,
510 int compile_id,
511 BasicType* sig_bt,
512 VMRegPair* regs,
513 BasicType ret_type);
514
515 // A compiled caller has just called the interpreter, but compiled code
516 // exists. Patch the caller so he no longer calls into the interpreter.
517 static void fixup_callers_callsite(Method* moop, address ret_pc);
518 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
519
520 // Slow-path Locking and Unlocking
521 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
522 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
523
524 // Resolving of calls
525 static address resolve_static_call_C (JavaThread* current);
526 static address resolve_virtual_call_C (JavaThread* current);
527 static address resolve_opt_virtual_call_C(JavaThread* current);
528
529 static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res);
530 static void store_inline_type_fields_to_buf(JavaThread* current, intptr_t res);
531
532 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
533 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
534 oopDesc* dest, jint dest_pos,
535 jint length, JavaThread* thread);
536
537 // handle ic miss with caller being compiled code
538 // wrong method handling (inline cache misses)
539 static address handle_wrong_method(JavaThread* current);
540 static address handle_wrong_method_abstract(JavaThread* current);
541 static address handle_wrong_method_ic_miss(JavaThread* current);
542 static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver);
543 static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS);
544
545 static address handle_unsafe_access(JavaThread* thread, address next_pc);
546
547 static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* vk);
548 #ifndef PRODUCT
549
550 // Collect and print inline cache miss statistics
551 private:
552 enum { maxICmiss_count = 100 };
553 static int _ICmiss_index; // length of IC miss histogram
554 static int _ICmiss_count[maxICmiss_count]; // miss counts
555 static address _ICmiss_at[maxICmiss_count]; // miss addresses
556 static void trace_ic_miss(address at);
557
558 public:
559 static uint _ic_miss_ctr; // total # of IC misses
560 static uint _wrong_method_ctr;
561 static uint _resolve_static_ctr;
562 static uint _resolve_virtual_ctr;
563 static uint _resolve_opt_virtual_ctr;
564 static uint _implicit_null_throws;
565 static uint _implicit_div0_throws;
566
567 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy
634 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
635 // setup. Compiled frames are fixed-size and the args are likely not in the
636 // right place. Hence all the args will likely be copied into the
637 // interpreter's frame, forcing that frame to grow. The compiled frame's
638 // outgoing stack args will be dead after the copy.
639 //
640 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
641 // also perform an official frame push & pop. They have a call to the native
642 // routine in their middles and end in a return (instead of ending in a jump).
643 // The native wrappers are stored in real nmethods instead of the BufferBlobs
644 // used by the adapters. The code generation happens here because it's very
645 // similar to what the adapters have to do.
646
647 class AdapterHandlerEntry : public CHeapObj<mtCode> {
648 friend class AdapterHandlerLibrary;
649
650 private:
651 AdapterFingerPrint* _fingerprint;
652 address _i2c_entry;
653 address _c2i_entry;
654 address _c2i_inline_entry;
655 address _c2i_inline_ro_entry;
656 address _c2i_unverified_entry;
657 address _c2i_unverified_inline_entry;
658 address _c2i_no_clinit_check_entry;
659
660 // Support for scalarized inline type calling convention
661 const GrowableArray<SigEntry>* _sig_cc;
662
663 #ifdef ASSERT
664 // Captures code and signature used to generate this adapter when
665 // verifying adapter equivalence.
666 unsigned char* _saved_code;
667 int _saved_code_length;
668 #endif
669
670 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
671 address c2i_inline_entry, address c2i_inline_ro_entry,
672 address c2i_unverified_entry, address c2i_unverified_inline_entry,
673 address c2i_no_clinit_check_entry) :
674 _fingerprint(fingerprint),
675 _i2c_entry(i2c_entry),
676 _c2i_entry(c2i_entry),
677 _c2i_inline_entry(c2i_inline_entry),
678 _c2i_inline_ro_entry(c2i_inline_ro_entry),
679 _c2i_unverified_entry(c2i_unverified_entry),
680 _c2i_unverified_inline_entry(c2i_unverified_inline_entry),
681 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry),
682 _sig_cc(nullptr)
683 #ifdef ASSERT
684 , _saved_code_length(0)
685 #endif
686 { }
687
688 ~AdapterHandlerEntry();
689
690 public:
691 address get_i2c_entry() const { return _i2c_entry; }
692 address get_c2i_entry() const { return _c2i_entry; }
693 address get_c2i_inline_entry() const { return _c2i_inline_entry; }
694 address get_c2i_inline_ro_entry() const { return _c2i_inline_ro_entry; }
695 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
696 address get_c2i_unverified_inline_entry() const { return _c2i_unverified_inline_entry; }
697 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
698
699 address base_address();
700 void relocate(address new_base);
701
702 // Support for scalarized inline type calling convention
703 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; }
704 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; }
705
706 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
707
708 #ifdef ASSERT
709 // Used to verify that code generated for shared adapters is equivalent
710 void save_code (unsigned char* code, int length);
711 bool compare_code(AdapterHandlerEntry* other);
712 #endif
713
714 //virtual void print_on(outputStream* st) const; DO NOT USE
715 void print_adapter_on(outputStream* st) const;
716 };
717
718 class CompiledEntrySignature;
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 CompiledEntrySignature& ces,
735 bool allocate_code_blob);
736 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
737 public:
738
739 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
740 address i2c_entry, address c2i_entry, address c2i_inline_entry, address c2i_inline_ro_entry,
741 address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry = nullptr);
742 static void create_native_wrapper(const methodHandle& method);
743 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
744
745 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
746 static void print_handler_on(outputStream* st, const CodeBlob* b);
747 static bool contains(const CodeBlob* b);
748 #ifndef PRODUCT
749 static void print_statistics();
750 #endif // PRODUCT
751
752 };
753
754 // Utility class for computing the calling convention of the 3 types
755 // of compiled method entries:
756 // Method::_from_compiled_entry - sig_cc
757 // Method::_from_compiled_inline_ro_entry - sig_cc_ro
758 // Method::_from_compiled_inline_entry - sig
759 class CompiledEntrySignature : public StackObj {
760 Method* _method;
761 int _num_inline_args;
762 bool _has_inline_recv;
763 GrowableArray<SigEntry>* _sig;
764 GrowableArray<SigEntry>* _sig_cc;
765 GrowableArray<SigEntry>* _sig_cc_ro;
766 VMRegPair* _regs;
767 VMRegPair* _regs_cc;
768 VMRegPair* _regs_cc_ro;
769
770 int _args_on_stack;
771 int _args_on_stack_cc;
772 int _args_on_stack_cc_ro;
773
774 bool _c1_needs_stack_repair;
775 bool _c2_needs_stack_repair;
776
777 GrowableArray<Method*>* _supers;
778
779 public:
780 Method* method() const { return _method; }
781
782 // Used by Method::_from_compiled_inline_entry
783 GrowableArray<SigEntry>* sig() const { return _sig; }
784
785 // Used by Method::_from_compiled_entry
786 GrowableArray<SigEntry>* sig_cc() const { return _sig_cc; }
787
788 // Used by Method::_from_compiled_inline_ro_entry
789 GrowableArray<SigEntry>* sig_cc_ro() const { return _sig_cc_ro; }
790
791 VMRegPair* regs() const { return _regs; }
792 VMRegPair* regs_cc() const { return _regs_cc; }
793 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; }
794
795 int args_on_stack() const { return _args_on_stack; }
796 int args_on_stack_cc() const { return _args_on_stack_cc; }
797 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; }
798
799 int num_inline_args() const { return _num_inline_args; }
800 bool has_inline_recv() const { return _has_inline_recv; }
801
802 bool has_scalarized_args() const { return _sig != _sig_cc; }
803 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; }
804 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; }
805 CodeOffsets::Entries c1_inline_ro_entry_type() const;
806
807 GrowableArray<Method*>* get_supers();
808
809 CompiledEntrySignature(Method* method = nullptr);
810 void compute_calling_conventions(bool init = true);
811 };
812
813 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP
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