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