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/bytecodeTracer.hpp"
31 #include "interpreter/linkResolver.hpp"
32 #include "memory/allStatic.hpp"
33 #include "memory/resourceArea.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 class SharedRuntime: AllStatic {
47 friend class VMStructs;
48
49 private:
50 static bool resolve_sub_helper_internal(methodHandle callee_method, const frame& caller_frame,
51 CompiledMethod* caller_nm, bool is_virtual, bool is_optimized,
52 Handle receiver, CallInfo& call_info, Bytecodes::Code invoke_code, TRAPS);
53 static methodHandle resolve_sub_helper(bool is_virtual, bool is_optimized, TRAPS);
54
55 // Shared stub locations
56
57 static RuntimeStub* _wrong_method_blob;
58 static RuntimeStub* _wrong_method_abstract_blob;
59 static RuntimeStub* _ic_miss_blob;
60 static RuntimeStub* _resolve_opt_virtual_call_blob;
61 static RuntimeStub* _resolve_virtual_call_blob;
62 static RuntimeStub* _resolve_static_call_blob;
63 static address _resolve_static_call_entry;
64
65 static DeoptimizationBlob* _deopt_blob;
66
67 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
68 static SafepointBlob* _polling_page_safepoint_handler_blob;
69 static SafepointBlob* _polling_page_return_handler_blob;
70
71 #ifdef COMPILER2
72 static UncommonTrapBlob* _uncommon_trap_blob;
73 #endif // COMPILER2
74
75 static nmethod* _cont_doYield_stub;
76
77 #ifndef PRODUCT
78 // Counters
79 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
80 #endif // !PRODUCT
81
82 private:
83 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
84 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
85 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
86
87 public:
88 static void generate_stubs(void);
89
90 // max bytes for each dtrace string parameter
91 enum { max_dtrace_string_size = 256 };
92
93 // The following arithmetic routines are used on platforms that do
94 // not have machine instructions to implement their functionality.
95 // Do not remove these.
96
97 // long arithmetics
98 static jlong lmul(jlong y, jlong x);
99 static jlong ldiv(jlong y, jlong x);
100 static jlong lrem(jlong y, jlong x);
101
102 // float and double remainder
103 static jfloat frem(jfloat x, jfloat y);
104 static jdouble drem(jdouble x, jdouble y);
105
106
303 // in order to correctly free the result.
304 //
305 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
306
307 // Fill in the "X cannot be cast to a Y" message for ClassCastException
308 //
309 // @param caster_klass the class of the object we are casting
310 // @param target_klass the target klass attempt
311 // @return the dynamically allocated exception message (must be freed
312 // by the caller using a resource mark)
313 //
314 // This version does not require access the frame, so it can be called
315 // from interpreted code
316 // The caller (or one of it's callers) must use a ResourceMark
317 // in order to correctly free the result.
318 //
319 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = NULL);
320
321 // Resolves a call site- may patch in the destination of the call into the
322 // compiled code.
323 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, TRAPS);
324
325 private:
326 // deopt blob
327 static void generate_deopt_blob(void);
328
329 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
330 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
331 bool& needs_ic_stub_refill, TRAPS);
332
333 public:
334 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
335
336 // Resets a call-site in compiled code so it will get resolved again.
337 static methodHandle reresolve_call_site(TRAPS);
338
339 // In the code prolog, if the klass comparison fails, the inline cache
340 // misses and the call site is patched to megamorphic
341 static methodHandle handle_ic_miss_helper(TRAPS);
342
343 // Find the method that called us.
344 static methodHandle find_callee_method(TRAPS);
345
346 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
347
348 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
349
350 private:
351 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
352 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
353
354 static Method* extract_attached_method(vframeStream& vfst);
355
356 #if defined(X86) && defined(COMPILER1)
357 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
358 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
359 #endif // X86 && COMPILER1
360
361 public:
362
363 // Read the array of BasicTypes from a Java signature, and compute where
364 // compiled Java code would like to put the results. Values in reg_lo and
365 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
366 // registers, those above refer to 4-byte stack slots. All stack slots are
367 // based off of the window top. SharedInfo::stack0 refers to the first usable
368 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
369 // 4-bytes higher.
370 // return value is the maximum number of VMReg stack slots the convention will use.
371 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
372
373 static void check_member_name_argument_is_last_argument(const methodHandle& method,
374 const BasicType* sig_bt,
375 const VMRegPair* regs) NOT_DEBUG_RETURN;
376
377 // Ditto except for calling C
378 //
379 // C argument in register AND stack slot.
380 // Some architectures require that an argument must be passed in a register
381 // AND in a stack slot. These architectures provide a second VMRegPair array
382 // to be filled by the c_calling_convention method. On other architectures,
383 // NULL is being passed as the second VMRegPair array, so arguments are either
384 // passed in a register OR in a stack slot.
385 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
386 int total_args_passed);
387
388 static int vector_calling_convention(VMRegPair *regs,
389 uint num_bits,
390 uint total_args_passed);
391
399 // by the time we reach the blob there is compiled code available. This allows
400 // the blob to pass the incoming stack pointer (the sender sp) in a known
401 // location for the interpreter to record. This is used by the frame code
402 // to correct the sender code to match up with the stack pointer when the
403 // thread left the compiled code. In addition it allows the interpreter
404 // to remove the space the c2i adapter allocated to do its argument conversion.
405
406 // Although a c2i blob will always run interpreted even if compiled code is
407 // present if we see that compiled code is present the compiled call site
408 // will be patched/re-resolved so that later calls will run compiled.
409
410 // Additionally a c2i blob need to have a unverified entry because it can be reached
411 // in situations where the call site is an inlined cache site and may go megamorphic.
412
413 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
414 // that the interpreter before it does any call dispatch will record the current
415 // stack pointer in the interpreter frame. On return it will restore the stack
416 // pointer as needed. This means the i2c adapter code doesn't need any special
417 // handshaking path with compiled code to keep the stack walking correct.
418
419 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
420 int total_args_passed,
421 int max_arg,
422 const BasicType *sig_bt,
423 const VMRegPair *regs,
424 AdapterFingerPrint* fingerprint);
425
426 static void gen_i2c_adapter(MacroAssembler *_masm,
427 int total_args_passed,
428 int comp_args_on_stack,
429 const BasicType *sig_bt,
430 const VMRegPair *regs);
431
432 // OSR support
433
434 // OSR_migration_begin will extract the jvm state from an interpreter
435 // frame (locals, monitors) and store the data in a piece of C heap
436 // storage. This then allows the interpreter frame to be removed from the
437 // stack and the OSR nmethod to be called. That method is called with a
438 // pointer to the C heap storage. This pointer is the return value from
439 // OSR_migration_begin.
440
441 static intptr_t* OSR_migration_begin(JavaThread *thread);
442
443 // OSR_migration_end is a trivial routine. It is called after the compiled
444 // method has extracted the jvm state from the C heap that OSR_migration_begin
445 // created. It's entire job is to simply free this storage.
446 static void OSR_migration_end(intptr_t* buf);
447
448 // Convert a sig into a calling convention register layout
449 // and find interesting things about it.
482 const methodHandle& method,
483 int compile_id,
484 BasicType* sig_bt,
485 VMRegPair* regs,
486 BasicType ret_type);
487
488 // A compiled caller has just called the interpreter, but compiled code
489 // exists. Patch the caller so he no longer calls into the interpreter.
490 static void fixup_callers_callsite(Method* moop, address ret_pc);
491 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
492
493 // Slow-path Locking and Unlocking
494 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
495 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
496
497 // Resolving of calls
498 static address resolve_static_call_C (JavaThread* current);
499 static address resolve_virtual_call_C (JavaThread* current);
500 static address resolve_opt_virtual_call_C(JavaThread* current);
501
502 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
503 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
504 oopDesc* dest, jint dest_pos,
505 jint length, JavaThread* thread);
506
507 // handle ic miss with caller being compiled code
508 // wrong method handling (inline cache misses)
509 static address handle_wrong_method(JavaThread* current);
510 static address handle_wrong_method_abstract(JavaThread* current);
511 static address handle_wrong_method_ic_miss(JavaThread* current);
512
513 static address handle_unsafe_access(JavaThread* thread, address next_pc);
514
515 #ifndef PRODUCT
516
517 // Collect and print inline cache miss statistics
518 private:
519 enum { maxICmiss_count = 100 };
520 static int _ICmiss_index; // length of IC miss histogram
521 static int _ICmiss_count[maxICmiss_count]; // miss counts
522 static address _ICmiss_at[maxICmiss_count]; // miss addresses
523 static void trace_ic_miss(address at);
524
525 public:
526 static int _ic_miss_ctr; // total # of IC misses
527 static int _wrong_method_ctr;
528 static int _resolve_static_ctr;
529 static int _resolve_virtual_ctr;
530 static int _resolve_opt_virtual_ctr;
531 static int _implicit_null_throws;
532 static int _implicit_div0_throws;
533
534 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
606 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
607 // setup. Compiled frames are fixed-size and the args are likely not in the
608 // right place. Hence all the args will likely be copied into the
609 // interpreter's frame, forcing that frame to grow. The compiled frame's
610 // outgoing stack args will be dead after the copy.
611 //
612 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
613 // also perform an official frame push & pop. They have a call to the native
614 // routine in their middles and end in a return (instead of ending in a jump).
615 // The native wrappers are stored in real nmethods instead of the BufferBlobs
616 // used by the adapters. The code generation happens here because it's very
617 // similar to what the adapters have to do.
618
619 class AdapterHandlerEntry : public CHeapObj<mtCode> {
620 friend class AdapterHandlerLibrary;
621
622 private:
623 AdapterFingerPrint* _fingerprint;
624 address _i2c_entry;
625 address _c2i_entry;
626 address _c2i_unverified_entry;
627 address _c2i_no_clinit_check_entry;
628
629 #ifdef ASSERT
630 // Captures code and signature used to generate this adapter when
631 // verifying adapter equivalence.
632 unsigned char* _saved_code;
633 int _saved_code_length;
634 #endif
635
636 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
637 address c2i_unverified_entry,
638 address c2i_no_clinit_check_entry) :
639 _fingerprint(fingerprint),
640 _i2c_entry(i2c_entry),
641 _c2i_entry(c2i_entry),
642 _c2i_unverified_entry(c2i_unverified_entry),
643 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry)
644 #ifdef ASSERT
645 , _saved_code_length(0)
646 #endif
647 { }
648
649 ~AdapterHandlerEntry();
650
651 public:
652 address get_i2c_entry() const { return _i2c_entry; }
653 address get_c2i_entry() const { return _c2i_entry; }
654 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
655 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
656
657 address base_address();
658 void relocate(address new_base);
659
660 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
661
662 #ifdef ASSERT
663 // Used to verify that code generated for shared adapters is equivalent
664 void save_code (unsigned char* code, int length);
665 bool compare_code(AdapterHandlerEntry* other);
666 #endif
667
668 //virtual void print_on(outputStream* st) const; DO NOT USE
669 void print_adapter_on(outputStream* st) const;
670 };
671
672 class AdapterHandlerLibrary: public AllStatic {
673 friend class SharedRuntime;
674 private:
675 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
676 static AdapterHandlerEntry* _abstract_method_handler;
677 static AdapterHandlerEntry* _no_arg_handler;
678 static AdapterHandlerEntry* _int_arg_handler;
679 static AdapterHandlerEntry* _obj_arg_handler;
680 static AdapterHandlerEntry* _obj_int_arg_handler;
681 static AdapterHandlerEntry* _obj_obj_arg_handler;
682
683 static BufferBlob* buffer_blob();
684 static void initialize();
685 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
686 int total_args_passed,
687 BasicType* sig_bt,
688 bool allocate_code_blob);
689 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
690 public:
691
692 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
693 address i2c_entry,
694 address c2i_entry,
695 address c2i_unverified_entry,
696 address c2i_no_clinit_check_entry = NULL);
697 static void create_native_wrapper(const methodHandle& method);
698 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
699
700 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
701 static void print_handler_on(outputStream* st, const CodeBlob* b);
702 static bool contains(const CodeBlob* b);
703 #ifndef PRODUCT
704 static void print_statistics();
705 #endif // PRODUCT
706
707 };
708
709 #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/bytecodeTracer.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "memory/allStatic.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "runtime/signature.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 class SharedRuntime: AllStatic {
50 friend class VMStructs;
51
52 private:
53 static bool resolve_sub_helper_internal(methodHandle callee_method, const frame& caller_frame,
54 CompiledMethod* caller_nm, bool is_virtual, bool is_optimized,
55 Handle receiver, CallInfo& call_info, Bytecodes::Code invoke_code, TRAPS);
56 static methodHandle resolve_sub_helper(bool is_virtual, bool is_optimized, bool* caller_is_c1, TRAPS);
57
58 // Shared stub locations
59
60 static RuntimeStub* _wrong_method_blob;
61 static RuntimeStub* _wrong_method_abstract_blob;
62 static RuntimeStub* _ic_miss_blob;
63 static RuntimeStub* _resolve_opt_virtual_call_blob;
64 static RuntimeStub* _resolve_virtual_call_blob;
65 static RuntimeStub* _resolve_static_call_blob;
66
67 static DeoptimizationBlob* _deopt_blob;
68
69 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
70 static SafepointBlob* _polling_page_safepoint_handler_blob;
71 static SafepointBlob* _polling_page_return_handler_blob;
72
73 #ifdef COMPILER2
74 static UncommonTrapBlob* _uncommon_trap_blob;
75 #endif // COMPILER2
76
77 static nmethod* _cont_doYield_stub;
78
79 #ifndef PRODUCT
80 // Counters
81 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
82 #endif // !PRODUCT
83
84 private:
85 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
86 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
87 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
88 public:
89 static void generate_stubs(void);
90
91 // max bytes for each dtrace string parameter
92 enum { max_dtrace_string_size = 256 };
93
94 // The following arithmetic routines are used on platforms that do
95 // not have machine instructions to implement their functionality.
96 // Do not remove these.
97
98 // long arithmetics
99 static jlong lmul(jlong y, jlong x);
100 static jlong ldiv(jlong y, jlong x);
101 static jlong lrem(jlong y, jlong x);
102
103 // float and double remainder
104 static jfloat frem(jfloat x, jfloat y);
105 static jdouble drem(jdouble x, jdouble y);
106
107
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 = NULL);
321
322 // Resolves a call site- may patch in the destination of the call into the
323 // compiled code.
324 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, bool* caller_is_c1, TRAPS);
325
326 private:
327 // deopt blob
328 static void generate_deopt_blob(void);
329
330 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
331 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
332 bool& needs_ic_stub_refill, bool& is_optimized, bool caller_is_c1, TRAPS);
333
334 public:
335 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
336
337 // Resets a call-site in compiled code so it will get resolved again.
338 static methodHandle reresolve_call_site(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, TRAPS);
339
340 // In the code prolog, if the klass comparison fails, the inline cache
341 // misses and the call site is patched to megamorphic
342 static methodHandle handle_ic_miss_helper(bool& is_optimized, bool& caller_is_c1, TRAPS);
343
344 // Find the method that called us.
345 static methodHandle find_callee_method(TRAPS);
346
347 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
348
349 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
350
351 static address entry_for_handle_wrong_method(methodHandle callee_method, bool is_static_call, bool is_optimized, bool caller_is_c1) {
352 assert(callee_method->verified_code_entry() != NULL, "Jump to zero!");
353 assert(callee_method->verified_inline_code_entry() != NULL, "Jump to zero!");
354 assert(callee_method->verified_inline_ro_code_entry() != NULL, "Jump to zero!");
355 if (caller_is_c1) {
356 return callee_method->verified_inline_code_entry();
357 } else if (is_static_call || is_optimized) {
358 return callee_method->verified_code_entry();
359 } else {
360 return callee_method->verified_inline_ro_code_entry();
361 }
362 }
363
364 private:
365 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
366 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
367
368 static Method* extract_attached_method(vframeStream& vfst);
369
370 #if defined(X86) && defined(COMPILER1)
371 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
372 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
373 #endif // X86 && COMPILER1
374
375 public:
376
377 // Read the array of BasicTypes from a Java signature, and compute where
378 // compiled Java code would like to put the results. Values in reg_lo and
379 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
380 // registers, those above refer to 4-byte stack slots. All stack slots are
381 // based off of the window top. SharedInfo::stack0 refers to the first usable
382 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
383 // 4-bytes higher.
384 // return value is the maximum number of VMReg stack slots the convention will use.
385 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
386 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
387 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
388 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
389 return java_calling_convention(sig_bt, regs, total_args_passed);
390 }
391 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
392 static const uint java_return_convention_max_int;
393 static const uint java_return_convention_max_float;
394
395 static void check_member_name_argument_is_last_argument(const methodHandle& method,
396 const BasicType* sig_bt,
397 const VMRegPair* regs) NOT_DEBUG_RETURN;
398
399 // Ditto except for calling C
400 //
401 // C argument in register AND stack slot.
402 // Some architectures require that an argument must be passed in a register
403 // AND in a stack slot. These architectures provide a second VMRegPair array
404 // to be filled by the c_calling_convention method. On other architectures,
405 // NULL is being passed as the second VMRegPair array, so arguments are either
406 // passed in a register OR in a stack slot.
407 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
408 int total_args_passed);
409
410 static int vector_calling_convention(VMRegPair *regs,
411 uint num_bits,
412 uint total_args_passed);
413
421 // by the time we reach the blob there is compiled code available. This allows
422 // the blob to pass the incoming stack pointer (the sender sp) in a known
423 // location for the interpreter to record. This is used by the frame code
424 // to correct the sender code to match up with the stack pointer when the
425 // thread left the compiled code. In addition it allows the interpreter
426 // to remove the space the c2i adapter allocated to do its argument conversion.
427
428 // Although a c2i blob will always run interpreted even if compiled code is
429 // present if we see that compiled code is present the compiled call site
430 // will be patched/re-resolved so that later calls will run compiled.
431
432 // Additionally a c2i blob need to have a unverified entry because it can be reached
433 // in situations where the call site is an inlined cache site and may go megamorphic.
434
435 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
436 // that the interpreter before it does any call dispatch will record the current
437 // stack pointer in the interpreter frame. On return it will restore the stack
438 // pointer as needed. This means the i2c adapter code doesn't need any special
439 // handshaking path with compiled code to keep the stack walking correct.
440
441 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm,
442 int comp_args_on_stack,
443 const GrowableArray<SigEntry>* sig,
444 const VMRegPair* regs,
445 const GrowableArray<SigEntry>* sig_cc,
446 const VMRegPair* regs_cc,
447 const GrowableArray<SigEntry>* sig_cc_ro,
448 const VMRegPair* regs_cc_ro,
449 AdapterFingerPrint* fingerprint,
450 AdapterBlob*& new_adapter,
451 bool allocate_code_blob);
452
453 static void gen_i2c_adapter(MacroAssembler *_masm,
454 int comp_args_on_stack,
455 const GrowableArray<SigEntry>* sig,
456 const VMRegPair *regs);
457
458 // OSR support
459
460 // OSR_migration_begin will extract the jvm state from an interpreter
461 // frame (locals, monitors) and store the data in a piece of C heap
462 // storage. This then allows the interpreter frame to be removed from the
463 // stack and the OSR nmethod to be called. That method is called with a
464 // pointer to the C heap storage. This pointer is the return value from
465 // OSR_migration_begin.
466
467 static intptr_t* OSR_migration_begin(JavaThread *thread);
468
469 // OSR_migration_end is a trivial routine. It is called after the compiled
470 // method has extracted the jvm state from the C heap that OSR_migration_begin
471 // created. It's entire job is to simply free this storage.
472 static void OSR_migration_end(intptr_t* buf);
473
474 // Convert a sig into a calling convention register layout
475 // and find interesting things about it.
508 const methodHandle& method,
509 int compile_id,
510 BasicType* sig_bt,
511 VMRegPair* regs,
512 BasicType ret_type);
513
514 // A compiled caller has just called the interpreter, but compiled code
515 // exists. Patch the caller so he no longer calls into the interpreter.
516 static void fixup_callers_callsite(Method* moop, address ret_pc);
517 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
518
519 // Slow-path Locking and Unlocking
520 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
521 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
522
523 // Resolving of calls
524 static address resolve_static_call_C (JavaThread* current);
525 static address resolve_virtual_call_C (JavaThread* current);
526 static address resolve_opt_virtual_call_C(JavaThread* current);
527
528 static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res);
529 static void store_inline_type_fields_to_buf(JavaThread* current, intptr_t res);
530
531 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
532 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
533 oopDesc* dest, jint dest_pos,
534 jint length, JavaThread* thread);
535
536 // handle ic miss with caller being compiled code
537 // wrong method handling (inline cache misses)
538 static address handle_wrong_method(JavaThread* current);
539 static address handle_wrong_method_abstract(JavaThread* current);
540 static address handle_wrong_method_ic_miss(JavaThread* current);
541 static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver);
542 static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS);
543
544 static address handle_unsafe_access(JavaThread* thread, address next_pc);
545
546 static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* vk);
547 #ifndef PRODUCT
548
549 // Collect and print inline cache miss statistics
550 private:
551 enum { maxICmiss_count = 100 };
552 static int _ICmiss_index; // length of IC miss histogram
553 static int _ICmiss_count[maxICmiss_count]; // miss counts
554 static address _ICmiss_at[maxICmiss_count]; // miss addresses
555 static void trace_ic_miss(address at);
556
557 public:
558 static int _ic_miss_ctr; // total # of IC misses
559 static int _wrong_method_ctr;
560 static int _resolve_static_ctr;
561 static int _resolve_virtual_ctr;
562 static int _resolve_opt_virtual_ctr;
563 static int _implicit_null_throws;
564 static int _implicit_div0_throws;
565
566 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
638 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
639 // setup. Compiled frames are fixed-size and the args are likely not in the
640 // right place. Hence all the args will likely be copied into the
641 // interpreter's frame, forcing that frame to grow. The compiled frame's
642 // outgoing stack args will be dead after the copy.
643 //
644 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
645 // also perform an official frame push & pop. They have a call to the native
646 // routine in their middles and end in a return (instead of ending in a jump).
647 // The native wrappers are stored in real nmethods instead of the BufferBlobs
648 // used by the adapters. The code generation happens here because it's very
649 // similar to what the adapters have to do.
650
651 class AdapterHandlerEntry : public CHeapObj<mtCode> {
652 friend class AdapterHandlerLibrary;
653
654 private:
655 AdapterFingerPrint* _fingerprint;
656 address _i2c_entry;
657 address _c2i_entry;
658 address _c2i_inline_entry;
659 address _c2i_inline_ro_entry;
660 address _c2i_unverified_entry;
661 address _c2i_unverified_inline_entry;
662 address _c2i_no_clinit_check_entry;
663
664 // Support for scalarized inline type calling convention
665 const GrowableArray<SigEntry>* _sig_cc;
666
667 #ifdef ASSERT
668 // Captures code and signature used to generate this adapter when
669 // verifying adapter equivalence.
670 unsigned char* _saved_code;
671 int _saved_code_length;
672 #endif
673
674 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
675 address c2i_inline_entry, address c2i_inline_ro_entry,
676 address c2i_unverified_entry, address c2i_unverified_inline_entry,
677 address c2i_no_clinit_check_entry) :
678 _fingerprint(fingerprint),
679 _i2c_entry(i2c_entry),
680 _c2i_entry(c2i_entry),
681 _c2i_inline_entry(c2i_inline_entry),
682 _c2i_inline_ro_entry(c2i_inline_ro_entry),
683 _c2i_unverified_entry(c2i_unverified_entry),
684 _c2i_unverified_inline_entry(c2i_unverified_inline_entry),
685 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry),
686 _sig_cc(NULL)
687 #ifdef ASSERT
688 , _saved_code_length(0)
689 #endif
690 { }
691
692 ~AdapterHandlerEntry();
693
694 public:
695 address get_i2c_entry() const { return _i2c_entry; }
696 address get_c2i_entry() const { return _c2i_entry; }
697 address get_c2i_inline_entry() const { return _c2i_inline_entry; }
698 address get_c2i_inline_ro_entry() const { return _c2i_inline_ro_entry; }
699 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
700 address get_c2i_unverified_inline_entry() const { return _c2i_unverified_inline_entry; }
701 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
702
703 address base_address();
704 void relocate(address new_base);
705
706 // Support for scalarized inline type calling convention
707 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; }
708 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; }
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 CompiledEntrySignature;
723
724 class AdapterHandlerLibrary: public AllStatic {
725 friend class SharedRuntime;
726 private:
727 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
728 static AdapterHandlerEntry* _abstract_method_handler;
729 static AdapterHandlerEntry* _no_arg_handler;
730 static AdapterHandlerEntry* _int_arg_handler;
731 static AdapterHandlerEntry* _obj_arg_handler;
732 static AdapterHandlerEntry* _obj_int_arg_handler;
733 static AdapterHandlerEntry* _obj_obj_arg_handler;
734
735 static BufferBlob* buffer_blob();
736 static void initialize();
737 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
738 CompiledEntrySignature& ces,
739 bool allocate_code_blob);
740 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
741 public:
742
743 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
744 address i2c_entry, address c2i_entry, address c2i_inline_entry, address c2i_inline_ro_entry,
745 address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry = NULL);
746 static void create_native_wrapper(const methodHandle& method);
747 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
748
749 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
750 static void print_handler_on(outputStream* st, const CodeBlob* b);
751 static bool contains(const CodeBlob* b);
752 #ifndef PRODUCT
753 static void print_statistics();
754 #endif // PRODUCT
755
756 };
757
758 // Utility class for computing the calling convention of the 3 types
759 // of compiled method entries:
760 // Method::_from_compiled_entry - sig_cc
761 // Method::_from_compiled_inline_ro_entry - sig_cc_ro
762 // Method::_from_compiled_inline_entry - sig
763 class CompiledEntrySignature : public StackObj {
764 Method* _method;
765 int _num_inline_args;
766 bool _has_inline_recv;
767 GrowableArray<SigEntry> *_sig;
768 GrowableArray<SigEntry> *_sig_cc;
769 GrowableArray<SigEntry> *_sig_cc_ro;
770 VMRegPair* _regs;
771 VMRegPair* _regs_cc;
772 VMRegPair* _regs_cc_ro;
773
774 int _args_on_stack;
775 int _args_on_stack_cc;
776 int _args_on_stack_cc_ro;
777
778 bool _c1_needs_stack_repair;
779 bool _c2_needs_stack_repair;
780
781 public:
782 Method* method() const { return _method; }
783
784 // Used by Method::_from_compiled_inline_entry
785 GrowableArray<SigEntry>& sig() const { return *_sig; }
786
787 // Used by Method::_from_compiled_entry
788 GrowableArray<SigEntry>& sig_cc() const { return *_sig_cc; }
789
790 // Used by Method::_from_compiled_inline_ro_entry
791 GrowableArray<SigEntry>& sig_cc_ro() const { return *_sig_cc_ro; }
792
793 VMRegPair* regs() const { return _regs; }
794 VMRegPair* regs_cc() const { return _regs_cc; }
795 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; }
796
797 int args_on_stack() const { return _args_on_stack; }
798 int args_on_stack_cc() const { return _args_on_stack_cc; }
799 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; }
800
801 int num_inline_args() const { return _num_inline_args; }
802 bool has_inline_recv() const { return _has_inline_recv; }
803
804 bool has_scalarized_args() const { return _sig != _sig_cc; }
805 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; }
806 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; }
807 CodeOffsets::Entries c1_inline_ro_entry_type() const;
808
809 CompiledEntrySignature(Method* method = NULL);
810 void compute_calling_conventions(bool init = true);
811 };
812
813 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP
|