< prev index next >

src/hotspot/share/runtime/sharedRuntime.hpp

Print this page

  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
< prev index next >