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/allocation.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "utilities/hashtable.hpp"
35 #include "utilities/macros.hpp"
36
37 class AdapterHandlerEntry;
38 class AdapterHandlerTable;
39 class AdapterFingerPrint;
40 class vframeStream;
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 static bool resolve_sub_helper_internal(methodHandle callee_method, const frame& caller_frame,
53 CompiledMethod* caller_nm, bool is_virtual, bool is_optimized,
54 Handle receiver, CallInfo& call_info, Bytecodes::Code invoke_code, TRAPS);
55 static methodHandle resolve_sub_helper(bool is_virtual, bool is_optimized, TRAPS);
56
57 // Shared stub locations
58
59 static RuntimeStub* _wrong_method_blob;
60 static RuntimeStub* _wrong_method_abstract_blob;
61 static RuntimeStub* _ic_miss_blob;
62 static RuntimeStub* _resolve_opt_virtual_call_blob;
63 static RuntimeStub* _resolve_virtual_call_blob;
64 static RuntimeStub* _resolve_static_call_blob;
65 static address _resolve_static_call_entry;
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 #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
297 // in order to correctly free the result.
298 //
299 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
300
301 // Fill in the "X cannot be cast to a Y" message for ClassCastException
302 //
303 // @param caster_klass the class of the object we are casting
304 // @param target_klass the target klass attempt
305 // @return the dynamically allocated exception message (must be freed
306 // by the caller using a resource mark)
307 //
308 // This version does not require access the frame, so it can be called
309 // from interpreted code
310 // The caller (or one of it's callers) must use a ResourceMark
311 // in order to correctly free the result.
312 //
313 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = NULL);
314
315 // Resolves a call site- may patch in the destination of the call into the
316 // compiled code.
317 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, TRAPS);
318
319 private:
320 // deopt blob
321 static void generate_deopt_blob(void);
322
323 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
324 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
325 bool& needs_ic_stub_refill, TRAPS);
326
327 public:
328 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
329
330 // Resets a call-site in compiled code so it will get resolved again.
331 static methodHandle reresolve_call_site(TRAPS);
332
333 // In the code prolog, if the klass comparison fails, the inline cache
334 // misses and the call site is patched to megamorphic
335 static methodHandle handle_ic_miss_helper(TRAPS);
336
337 // Find the method that called us.
338 static methodHandle find_callee_method(TRAPS);
339
340 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
341
342 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
343
344 private:
345 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
346 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
347
348 static Method* extract_attached_method(vframeStream& vfst);
349
350 #if defined(X86) && defined(COMPILER1)
351 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
352 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
353 #endif // X86 && COMPILER1
354
355 public:
356
357 // Read the array of BasicTypes from a Java signature, and compute where
358 // compiled Java code would like to put the results. Values in reg_lo and
359 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
360 // registers, those above refer to 4-byte stack slots. All stack slots are
361 // based off of the window top. SharedInfo::stack0 refers to the first usable
362 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
363 // 4-bytes higher.
364 // return value is the maximum number of VMReg stack slots the convention will use.
365 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
366
367 static void check_member_name_argument_is_last_argument(const methodHandle& method,
368 const BasicType* sig_bt,
369 const VMRegPair* regs) NOT_DEBUG_RETURN;
370
371 // Ditto except for calling C
372 //
373 // C argument in register AND stack slot.
374 // Some architectures require that an argument must be passed in a register
375 // AND in a stack slot. These architectures provide a second VMRegPair array
376 // to be filled by the c_calling_convention method. On other architectures,
377 // NULL is being passed as the second VMRegPair array, so arguments are either
378 // passed in a register OR in a stack slot.
379 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
380 int total_args_passed);
381
382 static int vector_calling_convention(VMRegPair *regs,
383 uint num_bits,
384 uint total_args_passed);
385
395 // by the time we reach the blob there is compiled code available. This allows
396 // the blob to pass the incoming stack pointer (the sender sp) in a known
397 // location for the interpreter to record. This is used by the frame code
398 // to correct the sender code to match up with the stack pointer when the
399 // thread left the compiled code. In addition it allows the interpreter
400 // to remove the space the c2i adapter allocated to do its argument conversion.
401
402 // Although a c2i blob will always run interpreted even if compiled code is
403 // present if we see that compiled code is present the compiled call site
404 // will be patched/re-resolved so that later calls will run compiled.
405
406 // Additionally a c2i blob need to have a unverified entry because it can be reached
407 // in situations where the call site is an inlined cache site and may go megamorphic.
408
409 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
410 // that the interpreter before it does any call dispatch will record the current
411 // stack pointer in the interpreter frame. On return it will restore the stack
412 // pointer as needed. This means the i2c adapter code doesn't need any special
413 // handshaking path with compiled code to keep the stack walking correct.
414
415 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
416 int total_args_passed,
417 int max_arg,
418 const BasicType *sig_bt,
419 const VMRegPair *regs,
420 AdapterFingerPrint* fingerprint);
421
422 static void gen_i2c_adapter(MacroAssembler *_masm,
423 int total_args_passed,
424 int comp_args_on_stack,
425 const BasicType *sig_bt,
426 const VMRegPair *regs);
427
428 // OSR support
429
430 // OSR_migration_begin will extract the jvm state from an interpreter
431 // frame (locals, monitors) and store the data in a piece of C heap
432 // storage. This then allows the interpreter frame to be removed from the
433 // stack and the OSR nmethod to be called. That method is called with a
434 // pointer to the C heap storage. This pointer is the return value from
435 // OSR_migration_begin.
436
437 static intptr_t* OSR_migration_begin(JavaThread *thread);
438
439 // OSR_migration_end is a trivial routine. It is called after the compiled
440 // method has extracted the jvm state from the C heap that OSR_migration_begin
441 // created. It's entire job is to simply free this storage.
442 static void OSR_migration_end(intptr_t* buf);
443
444 // Convert a sig into a calling convention register layout
445 // and find interesting things about it.
480 int compile_id,
481 BasicType* sig_bt,
482 VMRegPair* regs,
483 BasicType ret_type,
484 address critical_entry);
485
486 // A compiled caller has just called the interpreter, but compiled code
487 // exists. Patch the caller so he no longer calls into the interpreter.
488 static void fixup_callers_callsite(Method* moop, address ret_pc);
489 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
490
491 // Slow-path Locking and Unlocking
492 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
493 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
494
495 // Resolving of calls
496 static address resolve_static_call_C (JavaThread* current);
497 static address resolve_virtual_call_C (JavaThread* current);
498 static address resolve_opt_virtual_call_C(JavaThread* current);
499
500 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
501 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
502 oopDesc* dest, jint dest_pos,
503 jint length, JavaThread* thread);
504
505 // handle ic miss with caller being compiled code
506 // wrong method handling (inline cache misses, zombie methods)
507 static address handle_wrong_method(JavaThread* current);
508 static address handle_wrong_method_abstract(JavaThread* current);
509 static address handle_wrong_method_ic_miss(JavaThread* current);
510
511 static address handle_unsafe_access(JavaThread* thread, address next_pc);
512
513 #ifdef COMPILER2
514 static RuntimeStub* make_native_invoker(address call_target,
515 int shadow_space_bytes,
516 const GrowableArray<VMReg>& input_registers,
517 const GrowableArray<VMReg>& output_registers);
518 #endif
519
520 static void compute_move_order(const BasicType* in_sig_bt,
521 int total_in_args, const VMRegPair* in_regs,
522 int total_out_args, VMRegPair* out_regs,
523 GrowableArray<int>& arg_order,
524 VMRegPair tmp_vmreg);
525
526 #ifndef PRODUCT
527
528 // Collect and print inline cache miss statistics
529 private:
530 enum { maxICmiss_count = 100 };
531 static int _ICmiss_index; // length of IC miss histogram
532 static int _ICmiss_count[maxICmiss_count]; // miss counts
618 // setup. Compiled frames are fixed-size and the args are likely not in the
619 // right place. Hence all the args will likely be copied into the
620 // interpreter's frame, forcing that frame to grow. The compiled frame's
621 // outgoing stack args will be dead after the copy.
622 //
623 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
624 // also perform an official frame push & pop. They have a call to the native
625 // routine in their middles and end in a return (instead of ending in a jump).
626 // The native wrappers are stored in real nmethods instead of the BufferBlobs
627 // used by the adapters. The code generation happens here because it's very
628 // similar to what the adapters have to do.
629
630 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
631 friend class AdapterHandlerTable;
632 friend class AdapterHandlerLibrary;
633
634 private:
635 AdapterFingerPrint* _fingerprint;
636 address _i2c_entry;
637 address _c2i_entry;
638 address _c2i_unverified_entry;
639 address _c2i_no_clinit_check_entry;
640
641 #ifdef ASSERT
642 // Captures code and signature used to generate this adapter when
643 // verifying adapter equivalence.
644 unsigned char* _saved_code;
645 int _saved_code_length;
646 #endif
647
648 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry, address c2i_no_clinit_check_entry) {
649 _fingerprint = fingerprint;
650 _i2c_entry = i2c_entry;
651 _c2i_entry = c2i_entry;
652 _c2i_unverified_entry = c2i_unverified_entry;
653 _c2i_no_clinit_check_entry = c2i_no_clinit_check_entry;
654 #ifdef ASSERT
655 _saved_code_length = 0;
656 #endif
657 }
658
659 void deallocate();
660
661 // should never be used
662 AdapterHandlerEntry();
663
664 public:
665 address get_i2c_entry() const { return _i2c_entry; }
666 address get_c2i_entry() const { return _c2i_entry; }
667 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
668 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
669
670 address base_address();
671 void relocate(address new_base);
672
673 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
674
675 AdapterHandlerEntry* next() {
676 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
677 }
678
679 #ifdef ASSERT
680 // Used to verify that code generated for shared adapters is equivalent
681 void save_code (unsigned char* code, int length);
682 bool compare_code(AdapterHandlerEntry* other);
683 #endif
684
685 //virtual void print_on(outputStream* st) const; DO NOT USE
686 void print_adapter_on(outputStream* st) const;
687 };
688
689 class AdapterHandlerLibrary: public AllStatic {
690 friend class SharedRuntime;
691 private:
692 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
693 static AdapterHandlerTable* _adapters;
694 static AdapterHandlerEntry* _abstract_method_handler;
695 static AdapterHandlerEntry* _no_arg_handler;
696 static AdapterHandlerEntry* _int_arg_handler;
697 static AdapterHandlerEntry* _obj_arg_handler;
698 static AdapterHandlerEntry* _obj_int_arg_handler;
699 static AdapterHandlerEntry* _obj_obj_arg_handler;
700
701 static BufferBlob* buffer_blob();
702 static void initialize();
703 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
704 int total_args_passed,
705 BasicType* sig_bt,
706 bool allocate_code_blob);
707 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
708 public:
709
710 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
711 address i2c_entry,
712 address c2i_entry,
713 address c2i_unverified_entry,
714 address c2i_no_clinit_check_entry = NULL);
715 static void create_native_wrapper(const methodHandle& method);
716 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
717
718 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
719 static void print_handler_on(outputStream* st, const CodeBlob* b);
720 static bool contains(const CodeBlob* b);
721 #ifndef PRODUCT
722 static void print_statistics();
723 #endif // PRODUCT
724
725 };
726
727 #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/allocation.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "runtime/signature.hpp"
36 #include "utilities/hashtable.hpp"
37 #include "utilities/macros.hpp"
38
39 class AdapterHandlerEntry;
40 class AdapterHandlerTable;
41 class AdapterFingerPrint;
42 class vframeStream;
43 class SigEntry;
44
45 // Runtime is the base class for various runtime interfaces
46 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
47 // shared functionality such as exception forwarding (C++ to
48 // Java exceptions), locking/unlocking mechanisms, statistical
49 // information, etc.
50
51 class SharedRuntime: AllStatic {
52 friend class VMStructs;
53
54 private:
55 static bool resolve_sub_helper_internal(methodHandle callee_method, const frame& caller_frame,
56 CompiledMethod* caller_nm, bool is_virtual, bool is_optimized,
57 Handle receiver, CallInfo& call_info, Bytecodes::Code invoke_code, TRAPS);
58 static methodHandle resolve_sub_helper(bool is_virtual, bool is_optimized, bool* caller_is_c1, TRAPS);
59
60 // Shared stub locations
61
62 static RuntimeStub* _wrong_method_blob;
63 static RuntimeStub* _wrong_method_abstract_blob;
64 static RuntimeStub* _ic_miss_blob;
65 static RuntimeStub* _resolve_opt_virtual_call_blob;
66 static RuntimeStub* _resolve_virtual_call_blob;
67 static RuntimeStub* _resolve_static_call_blob;
68
69 static DeoptimizationBlob* _deopt_blob;
70
71 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
72 static SafepointBlob* _polling_page_safepoint_handler_blob;
73 static SafepointBlob* _polling_page_return_handler_blob;
74
75 #ifdef COMPILER2
76 static UncommonTrapBlob* _uncommon_trap_blob;
77 #endif // COMPILER2
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
298 // in order to correctly free the result.
299 //
300 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
301
302 // Fill in the "X cannot be cast to a Y" message for ClassCastException
303 //
304 // @param caster_klass the class of the object we are casting
305 // @param target_klass the target klass attempt
306 // @return the dynamically allocated exception message (must be freed
307 // by the caller using a resource mark)
308 //
309 // This version does not require access the frame, so it can be called
310 // from interpreted code
311 // The caller (or one of it's callers) must use a ResourceMark
312 // in order to correctly free the result.
313 //
314 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = NULL);
315
316 // Resolves a call site- may patch in the destination of the call into the
317 // compiled code.
318 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, bool* caller_is_c1, TRAPS);
319
320 private:
321 // deopt blob
322 static void generate_deopt_blob(void);
323
324 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
325 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
326 bool& needs_ic_stub_refill, bool& is_optimized, bool caller_is_c1, TRAPS);
327
328 public:
329 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
330
331 // Resets a call-site in compiled code so it will get resolved again.
332 static methodHandle reresolve_call_site(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, TRAPS);
333
334 // In the code prolog, if the klass comparison fails, the inline cache
335 // misses and the call site is patched to megamorphic
336 static methodHandle handle_ic_miss_helper(bool& is_optimized, bool& caller_is_c1, TRAPS);
337
338 // Find the method that called us.
339 static methodHandle find_callee_method(TRAPS);
340
341 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
342
343 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
344
345 static address entry_for_handle_wrong_method(methodHandle callee_method, bool is_static_call, bool is_optimized, bool caller_is_c1) {
346 assert(callee_method->verified_code_entry() != NULL, "Jump to zero!");
347 assert(callee_method->verified_inline_code_entry() != NULL, "Jump to zero!");
348 assert(callee_method->verified_inline_ro_code_entry() != NULL, "Jump to zero!");
349 if (caller_is_c1) {
350 return callee_method->verified_inline_code_entry();
351 } else if (is_static_call || is_optimized) {
352 return callee_method->verified_code_entry();
353 } else {
354 return callee_method->verified_inline_ro_code_entry();
355 }
356 }
357
358 private:
359 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
360 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
361
362 static Method* extract_attached_method(vframeStream& vfst);
363
364 #if defined(X86) && defined(COMPILER1)
365 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
366 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
367 #endif // X86 && COMPILER1
368
369 public:
370
371 // Read the array of BasicTypes from a Java signature, and compute where
372 // compiled Java code would like to put the results. Values in reg_lo and
373 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
374 // registers, those above refer to 4-byte stack slots. All stack slots are
375 // based off of the window top. SharedInfo::stack0 refers to the first usable
376 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
377 // 4-bytes higher.
378 // return value is the maximum number of VMReg stack slots the convention will use.
379 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
380 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
381 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
382 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
383 return java_calling_convention(sig_bt, regs, total_args_passed);
384 }
385 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
386 static const uint java_return_convention_max_int;
387 static const uint java_return_convention_max_float;
388
389 static void check_member_name_argument_is_last_argument(const methodHandle& method,
390 const BasicType* sig_bt,
391 const VMRegPair* regs) NOT_DEBUG_RETURN;
392
393 // Ditto except for calling C
394 //
395 // C argument in register AND stack slot.
396 // Some architectures require that an argument must be passed in a register
397 // AND in a stack slot. These architectures provide a second VMRegPair array
398 // to be filled by the c_calling_convention method. On other architectures,
399 // NULL is being passed as the second VMRegPair array, so arguments are either
400 // passed in a register OR in a stack slot.
401 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
402 int total_args_passed);
403
404 static int vector_calling_convention(VMRegPair *regs,
405 uint num_bits,
406 uint total_args_passed);
407
417 // by the time we reach the blob there is compiled code available. This allows
418 // the blob to pass the incoming stack pointer (the sender sp) in a known
419 // location for the interpreter to record. This is used by the frame code
420 // to correct the sender code to match up with the stack pointer when the
421 // thread left the compiled code. In addition it allows the interpreter
422 // to remove the space the c2i adapter allocated to do its argument conversion.
423
424 // Although a c2i blob will always run interpreted even if compiled code is
425 // present if we see that compiled code is present the compiled call site
426 // will be patched/re-resolved so that later calls will run compiled.
427
428 // Additionally a c2i blob need to have a unverified entry because it can be reached
429 // in situations where the call site is an inlined cache site and may go megamorphic.
430
431 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
432 // that the interpreter before it does any call dispatch will record the current
433 // stack pointer in the interpreter frame. On return it will restore the stack
434 // pointer as needed. This means the i2c adapter code doesn't need any special
435 // handshaking path with compiled code to keep the stack walking correct.
436
437 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm,
438 int comp_args_on_stack,
439 const GrowableArray<SigEntry>* sig,
440 const VMRegPair* regs,
441 const GrowableArray<SigEntry>* sig_cc,
442 const VMRegPair* regs_cc,
443 const GrowableArray<SigEntry>* sig_cc_ro,
444 const VMRegPair* regs_cc_ro,
445 AdapterFingerPrint* fingerprint,
446 AdapterBlob*& new_adapter,
447 bool allocate_code_blob);
448
449 static void gen_i2c_adapter(MacroAssembler *_masm,
450 int comp_args_on_stack,
451 const GrowableArray<SigEntry>* sig,
452 const VMRegPair *regs);
453
454 // OSR support
455
456 // OSR_migration_begin will extract the jvm state from an interpreter
457 // frame (locals, monitors) and store the data in a piece of C heap
458 // storage. This then allows the interpreter frame to be removed from the
459 // stack and the OSR nmethod to be called. That method is called with a
460 // pointer to the C heap storage. This pointer is the return value from
461 // OSR_migration_begin.
462
463 static intptr_t* OSR_migration_begin(JavaThread *thread);
464
465 // OSR_migration_end is a trivial routine. It is called after the compiled
466 // method has extracted the jvm state from the C heap that OSR_migration_begin
467 // created. It's entire job is to simply free this storage.
468 static void OSR_migration_end(intptr_t* buf);
469
470 // Convert a sig into a calling convention register layout
471 // and find interesting things about it.
506 int compile_id,
507 BasicType* sig_bt,
508 VMRegPair* regs,
509 BasicType ret_type,
510 address critical_entry);
511
512 // A compiled caller has just called the interpreter, but compiled code
513 // exists. Patch the caller so he no longer calls into the interpreter.
514 static void fixup_callers_callsite(Method* moop, address ret_pc);
515 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
516
517 // Slow-path Locking and Unlocking
518 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
519 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
520
521 // Resolving of calls
522 static address resolve_static_call_C (JavaThread* current);
523 static address resolve_virtual_call_C (JavaThread* current);
524 static address resolve_opt_virtual_call_C(JavaThread* current);
525
526 static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res);
527 static void store_inline_type_fields_to_buf(JavaThread* current, intptr_t res);
528
529 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
530 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
531 oopDesc* dest, jint dest_pos,
532 jint length, JavaThread* thread);
533
534 // handle ic miss with caller being compiled code
535 // wrong method handling (inline cache misses, zombie methods)
536 static address handle_wrong_method(JavaThread* current);
537 static address handle_wrong_method_abstract(JavaThread* current);
538 static address handle_wrong_method_ic_miss(JavaThread* current);
539 static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver);
540 static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS);
541
542 static address handle_unsafe_access(JavaThread* thread, address next_pc);
543
544 static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* vk);
545 #ifdef COMPILER2
546 static RuntimeStub* make_native_invoker(address call_target,
547 int shadow_space_bytes,
548 const GrowableArray<VMReg>& input_registers,
549 const GrowableArray<VMReg>& output_registers);
550 #endif
551
552 static void compute_move_order(const BasicType* in_sig_bt,
553 int total_in_args, const VMRegPair* in_regs,
554 int total_out_args, VMRegPair* out_regs,
555 GrowableArray<int>& arg_order,
556 VMRegPair tmp_vmreg);
557
558 #ifndef PRODUCT
559
560 // Collect and print inline cache miss statistics
561 private:
562 enum { maxICmiss_count = 100 };
563 static int _ICmiss_index; // length of IC miss histogram
564 static int _ICmiss_count[maxICmiss_count]; // miss counts
650 // setup. Compiled frames are fixed-size and the args are likely not in the
651 // right place. Hence all the args will likely be copied into the
652 // interpreter's frame, forcing that frame to grow. The compiled frame's
653 // outgoing stack args will be dead after the copy.
654 //
655 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
656 // also perform an official frame push & pop. They have a call to the native
657 // routine in their middles and end in a return (instead of ending in a jump).
658 // The native wrappers are stored in real nmethods instead of the BufferBlobs
659 // used by the adapters. The code generation happens here because it's very
660 // similar to what the adapters have to do.
661
662 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
663 friend class AdapterHandlerTable;
664 friend class AdapterHandlerLibrary;
665
666 private:
667 AdapterFingerPrint* _fingerprint;
668 address _i2c_entry;
669 address _c2i_entry;
670 address _c2i_inline_entry;
671 address _c2i_inline_ro_entry;
672 address _c2i_unverified_entry;
673 address _c2i_unverified_inline_entry;
674 address _c2i_no_clinit_check_entry;
675
676 // Support for scalarized inline type calling convention
677 const GrowableArray<SigEntry>* _sig_cc;
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 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_inline_entry,
687 address c2i_inline_ro_entry, address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry) {
688 _fingerprint = fingerprint;
689 _i2c_entry = i2c_entry;
690 _c2i_entry = c2i_entry;
691 _c2i_inline_entry = c2i_inline_entry;
692 _c2i_inline_ro_entry = c2i_inline_ro_entry;
693 _c2i_unverified_entry = c2i_unverified_entry;
694 _c2i_unverified_inline_entry = c2i_unverified_inline_entry;
695 _c2i_no_clinit_check_entry = c2i_no_clinit_check_entry;
696 _sig_cc = NULL;
697 #ifdef ASSERT
698 _saved_code_length = 0;
699 #endif
700 }
701
702 void deallocate();
703
704 // should never be used
705 AdapterHandlerEntry();
706
707 public:
708 address get_i2c_entry() const { return _i2c_entry; }
709 address get_c2i_entry() const { return _c2i_entry; }
710 address get_c2i_inline_entry() const { return _c2i_inline_entry; }
711 address get_c2i_inline_ro_entry() const { return _c2i_inline_ro_entry; }
712 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
713 address get_c2i_unverified_inline_entry() const { return _c2i_unverified_inline_entry; }
714 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
715
716 address base_address();
717 void relocate(address new_base);
718
719 // Support for scalarized inline type calling convention
720 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; }
721 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; }
722
723 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
724
725 AdapterHandlerEntry* next() {
726 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
727 }
728
729 #ifdef ASSERT
730 // Used to verify that code generated for shared adapters is equivalent
731 void save_code (unsigned char* code, int length);
732 bool compare_code(AdapterHandlerEntry* other);
733 #endif
734
735 //virtual void print_on(outputStream* st) const; DO NOT USE
736 void print_adapter_on(outputStream* st) const;
737 };
738
739 class CompiledEntrySignature;
740
741 class AdapterHandlerLibrary: public AllStatic {
742 friend class SharedRuntime;
743 private:
744 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
745 static AdapterHandlerTable* _adapters;
746 static AdapterHandlerEntry* _abstract_method_handler;
747 static AdapterHandlerEntry* _no_arg_handler;
748 static AdapterHandlerEntry* _int_arg_handler;
749 static AdapterHandlerEntry* _obj_arg_handler;
750 static AdapterHandlerEntry* _obj_int_arg_handler;
751 static AdapterHandlerEntry* _obj_obj_arg_handler;
752
753 static BufferBlob* buffer_blob();
754 static void initialize();
755 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
756 CompiledEntrySignature& ces,
757 bool allocate_code_blob);
758 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
759 public:
760
761 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
762 address i2c_entry, address c2i_entry, address c2i_inline_entry, address c2i_inline_ro_entry,
763 address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry = NULL);
764 static void create_native_wrapper(const methodHandle& method);
765 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
766
767 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
768 static void print_handler_on(outputStream* st, const CodeBlob* b);
769 static bool contains(const CodeBlob* b);
770 #ifndef PRODUCT
771 static void print_statistics();
772 #endif // PRODUCT
773
774 };
775
776 // Utility class for computing the calling convention of the 3 types
777 // of compiled method entries:
778 // Method::_from_compiled_entry - sig_cc
779 // Method::_from_compiled_inline_ro_entry - sig_cc_ro
780 // Method::_from_compiled_inline_entry - sig
781 class CompiledEntrySignature : public StackObj {
782 Method* _method;
783 int _num_inline_args;
784 bool _has_inline_recv;
785 GrowableArray<SigEntry> *_sig;
786 GrowableArray<SigEntry> *_sig_cc;
787 GrowableArray<SigEntry> *_sig_cc_ro;
788 VMRegPair* _regs;
789 VMRegPair* _regs_cc;
790 VMRegPair* _regs_cc_ro;
791
792 int _args_on_stack;
793 int _args_on_stack_cc;
794 int _args_on_stack_cc_ro;
795
796 bool _c1_needs_stack_repair;
797 bool _c2_needs_stack_repair;
798
799 public:
800 Method* method() const { return _method; }
801
802 // Used by Method::_from_compiled_inline_entry
803 GrowableArray<SigEntry>& sig() const { return *_sig; }
804
805 // Used by Method::_from_compiled_entry
806 GrowableArray<SigEntry>& sig_cc() const { return *_sig_cc; }
807
808 // Used by Method::_from_compiled_inline_ro_entry
809 GrowableArray<SigEntry>& sig_cc_ro() const { return *_sig_cc_ro; }
810
811 VMRegPair* regs() const { return _regs; }
812 VMRegPair* regs_cc() const { return _regs_cc; }
813 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; }
814
815 int args_on_stack() const { return _args_on_stack; }
816 int args_on_stack_cc() const { return _args_on_stack_cc; }
817 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; }
818
819 int num_inline_args() const { return _num_inline_args; }
820 bool has_inline_arg() const { return _num_inline_args > 0; }
821 bool has_inline_recv() const { return _has_inline_recv; }
822
823 bool has_scalarized_args() const { return _sig != _sig_cc; }
824 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; }
825 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; }
826 CodeOffsets::Entries c1_inline_ro_entry_type() const;
827
828 CompiledEntrySignature(Method* method = NULL);
829 void compute_calling_conventions();
830
831 private:
832 int compute_scalarized_cc(GrowableArray<SigEntry>*& sig_cc, VMRegPair*& regs_cc, bool scalar_receiver);
833 };
834
835 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP
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