1 /*
  2  * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
  3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  4  *
  5  * This code is free software; you can redistribute it and/or modify it
  6  * under the terms of the GNU General Public License version 2 only, as
  7  * published by the Free Software Foundation.
  8  *
  9  * This code is distributed in the hope that it will be useful, but WITHOUT
 10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 12  * version 2 for more details (a copy is included in the LICENSE file that
 13  * accompanied this code).
 14  *
 15  * You should have received a copy of the GNU General Public License version
 16  * 2 along with this work; if not, write to the Free Software Foundation,
 17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 18  *
 19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 20  * or visit www.oracle.com if you need additional information or have any
 21  * questions.
 22  *
 23  */
 24 
 25 #ifndef SHARE_RUNTIME_SHAREDRUNTIME_HPP
 26 #define SHARE_RUNTIME_SHAREDRUNTIME_HPP
 27 
 28 #include "asm/codeBuffer.hpp"
 29 #include "code/codeBlob.hpp"
 30 #include "code/vmreg.hpp"
 31 #include "interpreter/linkResolver.hpp"
 32 #include "memory/allStatic.hpp"
 33 #include "memory/resourceArea.hpp"
 34 #include "runtime/signature.hpp"
 35 #include "utilities/macros.hpp"
 36 
 37 class AdapterHandlerEntry;
 38 class AdapterFingerPrint;
 39 class vframeStream;
 40 class SigEntry;
 41 
 42 // Runtime is the base class for various runtime interfaces
 43 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
 44 // shared functionality such as exception forwarding (C++ to
 45 // Java exceptions), locking/unlocking mechanisms, statistical
 46 // information, etc.
 47 
 48 class SharedRuntime: AllStatic {
 49   friend class VMStructs;
 50 
 51  private:
 52   // Shared stub locations
 53 
 54   static RuntimeStub*        _wrong_method_blob;
 55   static RuntimeStub*        _wrong_method_abstract_blob;
 56   static RuntimeStub*        _ic_miss_blob;
 57   static RuntimeStub*        _resolve_opt_virtual_call_blob;
 58   static RuntimeStub*        _resolve_virtual_call_blob;
 59   static RuntimeStub*        _resolve_static_call_blob;
 60 
 61   static DeoptimizationBlob* _deopt_blob;
 62 
 63   static SafepointBlob*      _polling_page_vectors_safepoint_handler_blob;
 64   static SafepointBlob*      _polling_page_safepoint_handler_blob;
 65   static SafepointBlob*      _polling_page_return_handler_blob;
 66 
 67 #ifdef COMPILER2
 68   static UncommonTrapBlob*   _uncommon_trap_blob;
 69 #endif // COMPILER2
 70 
 71   static nmethod*            _cont_doYield_stub;
 72 
 73 #ifndef PRODUCT
 74   // Counters
 75   static int64_t _nof_megamorphic_calls;         // total # of megamorphic calls (through vtable)
 76 #endif // !PRODUCT
 77 
 78  private:
 79   enum { POLL_AT_RETURN,  POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
 80   static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
 81   static RuntimeStub*   generate_resolve_blob(address destination, const char* name);
 82  public:
 83   static void generate_stubs(void);
 84 
 85   // max bytes for each dtrace string parameter
 86   enum { max_dtrace_string_size = 256 };
 87 
 88   // The following arithmetic routines are used on platforms that do
 89   // not have machine instructions to implement their functionality.
 90   // Do not remove these.
 91 
 92   // long arithmetics
 93   static jlong   lmul(jlong y, jlong x);
 94   static jlong   ldiv(jlong y, jlong x);
 95   static jlong   lrem(jlong y, jlong x);
 96 
 97   // float and double remainder
 98   static jfloat  frem(jfloat  x, jfloat  y);
 99   static jdouble drem(jdouble x, jdouble y);
100 
101 
102 #ifdef _WIN64
103   // Workaround for fmod issue in the Windows x64 CRT
104   static double fmod_winx64(double x, double y);
105 #endif
106 
107 #ifdef __SOFTFP__
108   static jfloat  fadd(jfloat x, jfloat y);
109   static jfloat  fsub(jfloat x, jfloat y);
110   static jfloat  fmul(jfloat x, jfloat y);
111   static jfloat  fdiv(jfloat x, jfloat y);
112 
113   static jdouble dadd(jdouble x, jdouble y);
114   static jdouble dsub(jdouble x, jdouble y);
115   static jdouble dmul(jdouble x, jdouble y);
116   static jdouble ddiv(jdouble x, jdouble y);
117 #endif // __SOFTFP__
118 
119   // float conversion (needs to set appropriate rounding mode)
120   static jint    f2i (jfloat  x);
121   static jlong   f2l (jfloat  x);
122   static jint    d2i (jdouble x);
123   static jlong   d2l (jdouble x);
124   static jfloat  d2f (jdouble x);
125   static jfloat  l2f (jlong   x);
126   static jdouble l2d (jlong   x);
127   static jfloat  i2f (jint    x);
128 
129 #ifdef __SOFTFP__
130   static jdouble i2d (jint    x);
131   static jdouble f2d (jfloat  x);
132 #endif // __SOFTFP__
133 
134   // double trigonometrics and transcendentals
135   static jdouble dsin(jdouble x);
136   static jdouble dcos(jdouble x);
137   static jdouble dtan(jdouble x);
138   static jdouble dlog(jdouble x);
139   static jdouble dlog10(jdouble x);
140   static jdouble dexp(jdouble x);
141   static jdouble dpow(jdouble x, jdouble y);
142 
143 #if defined(__SOFTFP__) || defined(E500V2)
144   static double dabs(double f);
145 #endif
146 
147 #if defined(__SOFTFP__) || defined(PPC)
148   static double dsqrt(double f);
149 #endif
150 
151   // Montgomery multiplication
152   static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints,
153                                   jint len, jlong inv, jint *m_ints);
154   static void montgomery_square(jint *a_ints, jint *n_ints,
155                                 jint len, jlong inv, jint *m_ints);
156 
157 #ifdef __SOFTFP__
158   // C++ compiler generates soft float instructions as well as passing
159   // float and double in registers.
160   static int  fcmpl(float x, float y);
161   static int  fcmpg(float x, float y);
162   static int  dcmpl(double x, double y);
163   static int  dcmpg(double x, double y);
164 
165   static int unordered_fcmplt(float x, float y);
166   static int unordered_dcmplt(double x, double y);
167   static int unordered_fcmple(float x, float y);
168   static int unordered_dcmple(double x, double y);
169   static int unordered_fcmpge(float x, float y);
170   static int unordered_dcmpge(double x, double y);
171   static int unordered_fcmpgt(float x, float y);
172   static int unordered_dcmpgt(double x, double y);
173 
174   static float  fneg(float f);
175   static double dneg(double f);
176 #endif
177 
178   // exception handling across interpreter/compiler boundaries
179   static address raw_exception_handler_for_return_address(JavaThread* current, address return_address);
180   static address exception_handler_for_return_address(JavaThread* current, address return_address);
181 
182   // exception handling and implicit exceptions
183   static address compute_compiled_exc_handler(CompiledMethod* nm, address ret_pc, Handle& exception,
184                                               bool force_unwind, bool top_frame_only, bool& recursive_exception_occurred);
185   enum ImplicitExceptionKind {
186     IMPLICIT_NULL,
187     IMPLICIT_DIVIDE_BY_ZERO,
188     STACK_OVERFLOW
189   };
190   static void    throw_AbstractMethodError(JavaThread* current);
191   static void    throw_IncompatibleClassChangeError(JavaThread* current);
192   static void    throw_ArithmeticException(JavaThread* current);
193   static void    throw_NullPointerException(JavaThread* current);
194   static void    throw_NullPointerException_at_call(JavaThread* current);
195   static void    throw_StackOverflowError(JavaThread* current);
196   static void    throw_delayed_StackOverflowError(JavaThread* current);
197   static void    throw_StackOverflowError_common(JavaThread* current, bool delayed);
198   static address continuation_for_implicit_exception(JavaThread* current,
199                                                      address faulting_pc,
200                                                      ImplicitExceptionKind exception_kind);
201 
202   // Post-slow-path-allocation, pre-initializing-stores step for
203   // implementing e.g. ReduceInitialCardMarks
204   static void on_slowpath_allocation_exit(JavaThread* current);
205 
206   static void enable_stack_reserved_zone(JavaThread* current);
207   static frame look_for_reserved_stack_annotated_method(JavaThread* current, frame fr);
208 
209   // Shared stub locations
210   static address get_poll_stub(address pc);
211 
212   static address get_ic_miss_stub() {
213     assert(_ic_miss_blob!= nullptr, "oops");
214     return _ic_miss_blob->entry_point();
215   }
216 
217   static address get_handle_wrong_method_stub() {
218     assert(_wrong_method_blob!= nullptr, "oops");
219     return _wrong_method_blob->entry_point();
220   }
221 
222   static address get_handle_wrong_method_abstract_stub() {
223     assert(_wrong_method_abstract_blob!= nullptr, "oops");
224     return _wrong_method_abstract_blob->entry_point();
225   }
226 
227 #ifdef COMPILER2
228   static void generate_uncommon_trap_blob(void);
229   static UncommonTrapBlob* uncommon_trap_blob()                  { return _uncommon_trap_blob; }
230 #endif // COMPILER2
231 
232   static address get_resolve_opt_virtual_call_stub() {
233     assert(_resolve_opt_virtual_call_blob != nullptr, "oops");
234     return _resolve_opt_virtual_call_blob->entry_point();
235   }
236   static address get_resolve_virtual_call_stub() {
237     assert(_resolve_virtual_call_blob != nullptr, "oops");
238     return _resolve_virtual_call_blob->entry_point();
239   }
240   static address get_resolve_static_call_stub() {
241     assert(_resolve_static_call_blob != nullptr, "oops");
242     return _resolve_static_call_blob->entry_point();
243   }
244 
245   static SafepointBlob* polling_page_return_handler_blob()     { return _polling_page_return_handler_blob; }
246   static SafepointBlob* polling_page_safepoint_handler_blob()  { return _polling_page_safepoint_handler_blob; }
247   static SafepointBlob* polling_page_vectors_safepoint_handler_blob()  { return _polling_page_vectors_safepoint_handler_blob; }
248 
249   static nmethod* cont_doYield_stub() {
250     assert(_cont_doYield_stub != nullptr, "oops");
251     return _cont_doYield_stub;
252   }
253 
254   // Counters
255 #ifndef PRODUCT
256   static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
257 #endif // PRODUCT
258 
259   // Helper routine for full-speed JVMTI exception throwing support
260   static void throw_and_post_jvmti_exception(JavaThread* current, Handle h_exception);
261   static void throw_and_post_jvmti_exception(JavaThread* current, Symbol* name, const char *message = nullptr);
262 
263 #if INCLUDE_JVMTI
264   // Functions for JVMTI notifications
265   static void notify_jvmti_vthread_start(oopDesc* vt, jboolean hide, JavaThread* current);
266   static void notify_jvmti_vthread_end(oopDesc* vt, jboolean hide, JavaThread* current);
267   static void notify_jvmti_vthread_mount(oopDesc* vt, jboolean hide, JavaThread* current);
268   static void notify_jvmti_vthread_unmount(oopDesc* vt, jboolean hide, JavaThread* current);
269 #endif
270 
271   // RedefineClasses() tracing support for obsolete method entry
272   static int rc_trace_method_entry(JavaThread* thread, Method* m);
273 
274   // To be used as the entry point for unresolved native methods.
275   static address native_method_throw_unsatisfied_link_error_entry();
276 
277   static void register_finalizer(JavaThread* thread, oopDesc* obj);
278 
279   // dtrace notifications
280   static int dtrace_object_alloc(oopDesc* o);
281   static int dtrace_object_alloc(JavaThread* thread, oopDesc* o);
282   static int dtrace_object_alloc(JavaThread* thread, oopDesc* o, size_t size);
283   static int dtrace_method_entry(JavaThread* thread, Method* m);
284   static int dtrace_method_exit(JavaThread* thread, Method* m);
285 
286   // Utility method for retrieving the Java thread id, returns 0 if the
287   // thread is not a well formed Java thread.
288   static jlong get_java_tid(JavaThread* thread);
289 
290 
291   // used by native wrappers to re-enable yellow if overflow happened in native code
292   static void reguard_yellow_pages();
293 
294   // Fill in the "X cannot be cast to a Y" message for ClassCastException
295   //
296   // @param thr the current thread
297   // @param caster_klass the class of the object we are casting
298   // @return the dynamically allocated exception message (must be freed
299   // by the caller using a resource mark)
300   //
301   // BCP must refer to the current 'checkcast' opcode for the frame
302   // on top of the stack.
303   // The caller (or one of its callers) must use a ResourceMark
304   // in order to correctly free the result.
305   //
306   static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
307 
308   // Fill in the "X cannot be cast to a Y" message for ClassCastException
309   //
310   // @param caster_klass the class of the object we are casting
311   // @param target_klass the target klass attempt
312   // @return the dynamically allocated exception message (must be freed
313   // by the caller using a resource mark)
314   //
315   // This version does not require access the frame, so it can be called
316   // from interpreted code
317   // The caller (or one of it's callers) must use a ResourceMark
318   // in order to correctly free the result.
319   //
320   static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr);
321 
322   // Resolves a call site- may patch in the destination of the call into the
323   // compiled code.
324   static methodHandle resolve_helper(bool is_virtual, bool is_optimized, bool& caller_is_c1, TRAPS);
325 
326  private:
327   // deopt blob
328   static void generate_deopt_blob(void);
329 
330   static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
331                                              methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
332                                              bool& needs_ic_stub_refill, bool& is_optimized, bool caller_is_c1, TRAPS);
333 
334  public:
335   static DeoptimizationBlob* deopt_blob(void)      { return _deopt_blob; }
336 
337   // Resets a call-site in compiled code so it will get resolved again.
338   static methodHandle reresolve_call_site(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, TRAPS);
339 
340   // In the code prolog, if the klass comparison fails, the inline cache
341   // misses and the call site is patched to megamorphic
342   static methodHandle handle_ic_miss_helper(bool& is_optimized, bool& caller_is_c1, TRAPS);
343 
344   // Find the method that called us.
345   static methodHandle find_callee_method(bool is_optimized, bool& caller_is_c1, TRAPS);
346 
347   static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
348 
349   static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
350 
351   static address entry_for_handle_wrong_method(methodHandle callee_method, bool is_static_call, bool is_optimized, bool caller_is_c1) {
352     assert(callee_method->verified_code_entry() != nullptr, "Jump to zero!");
353     assert(callee_method->verified_inline_code_entry() != nullptr, "Jump to zero!");
354     assert(callee_method->verified_inline_ro_code_entry() != nullptr, "Jump to zero!");
355     if (caller_is_c1) {
356       return callee_method->verified_inline_code_entry();
357     } else if (is_static_call || is_optimized) {
358       return callee_method->verified_code_entry();
359     } else {
360       return callee_method->verified_inline_ro_code_entry();
361     }
362   }
363 
364  private:
365   static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
366   static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
367 
368   static Method* extract_attached_method(vframeStream& vfst);
369 
370 #if defined(X86) && defined(COMPILER1)
371   // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
372   static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
373 #endif // X86 && COMPILER1
374 
375  public:
376 
377   // Read the array of BasicTypes from a Java signature, and compute where
378   // compiled Java code would like to put the results.  Values in reg_lo and
379   // reg_hi refer to 4-byte quantities.  Values less than SharedInfo::stack0 are
380   // registers, those above refer to 4-byte stack slots.  All stack slots are
381   // based off of the window top.  SharedInfo::stack0 refers to the first usable
382   // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
383   // 4-bytes higher.
384   // return value is the maximum number of VMReg stack slots the convention will use.
385   static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
386   static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
387     BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
388     int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
389     return java_calling_convention(sig_bt, regs, total_args_passed);
390   }
391   static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
392   static const uint java_return_convention_max_int;
393   static const uint java_return_convention_max_float;
394 
395   static void check_member_name_argument_is_last_argument(const methodHandle& method,
396                                                           const BasicType* sig_bt,
397                                                           const VMRegPair* regs) NOT_DEBUG_RETURN;
398 
399   // Ditto except for calling C
400   //
401   // C argument in register AND stack slot.
402   // Some architectures require that an argument must be passed in a register
403   // AND in a stack slot. These architectures provide a second VMRegPair array
404   // to be filled by the c_calling_convention method. On other architectures,
405   // null is being passed as the second VMRegPair array, so arguments are either
406   // passed in a register OR in a stack slot.
407   static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
408 
409   static int vector_calling_convention(VMRegPair *regs,
410                                        uint num_bits,
411                                        uint total_args_passed);
412 
413   // Generate I2C and C2I adapters. These adapters are simple argument marshalling
414   // blobs. Unlike adapters in the tiger and earlier releases the code in these
415   // blobs does not create a new frame and are therefore virtually invisible
416   // to the stack walking code. In general these blobs extend the callers stack
417   // as needed for the conversion of argument locations.
418 
419   // When calling a c2i blob the code will always call the interpreter even if
420   // by the time we reach the blob there is compiled code available. This allows
421   // the blob to pass the incoming stack pointer (the sender sp) in a known
422   // location for the interpreter to record. This is used by the frame code
423   // to correct the sender code to match up with the stack pointer when the
424   // thread left the compiled code. In addition it allows the interpreter
425   // to remove the space the c2i adapter allocated to do its argument conversion.
426 
427   // Although a c2i blob will always run interpreted even if compiled code is
428   // present if we see that compiled code is present the compiled call site
429   // will be patched/re-resolved so that later calls will run compiled.
430 
431   // Additionally a c2i blob need to have a unverified entry because it can be reached
432   // in situations where the call site is an inlined cache site and may go megamorphic.
433 
434   // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
435   // that the interpreter before it does any call dispatch will record the current
436   // stack pointer in the interpreter frame. On return it will restore the stack
437   // pointer as needed. This means the i2c adapter code doesn't need any special
438   // handshaking path with compiled code to keep the stack walking correct.
439 
440   static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm,
441                                                       int comp_args_on_stack,
442                                                       const GrowableArray<SigEntry>* sig,
443                                                       const VMRegPair* regs,
444                                                       const GrowableArray<SigEntry>* sig_cc,
445                                                       const VMRegPair* regs_cc,
446                                                       const GrowableArray<SigEntry>* sig_cc_ro,
447                                                       const VMRegPair* regs_cc_ro,
448                                                       AdapterFingerPrint* fingerprint,
449                                                       AdapterBlob*& new_adapter,
450                                                       bool allocate_code_blob);
451 
452   static void gen_i2c_adapter(MacroAssembler *_masm,
453                               int comp_args_on_stack,
454                               const GrowableArray<SigEntry>* sig,
455                               const VMRegPair *regs);
456 
457   // OSR support
458 
459   // OSR_migration_begin will extract the jvm state from an interpreter
460   // frame (locals, monitors) and store the data in a piece of C heap
461   // storage. This then allows the interpreter frame to be removed from the
462   // stack and the OSR nmethod to be called. That method is called with a
463   // pointer to the C heap storage. This pointer is the return value from
464   // OSR_migration_begin.
465 
466   static intptr_t* OSR_migration_begin(JavaThread *thread);
467 
468   // OSR_migration_end is a trivial routine. It is called after the compiled
469   // method has extracted the jvm state from the C heap that OSR_migration_begin
470   // created. It's entire job is to simply free this storage.
471   static void OSR_migration_end(intptr_t* buf);
472 
473   // Convert a sig into a calling convention register layout
474   // and find interesting things about it.
475   static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
476   static VMReg name_for_receiver();
477 
478   // "Top of Stack" slots that may be unused by the calling convention but must
479   // otherwise be preserved.
480   // On Intel these are not necessary and the value can be zero.
481   // On Sparc this describes the words reserved for storing a register window
482   // when an interrupt occurs.
483   static uint out_preserve_stack_slots();
484 
485   // Stack slots that may be unused by the calling convention but must
486   // otherwise be preserved.  On Intel this includes the return address.
487   // On PowerPC it includes the 4 words holding the old TOC & LR glue.
488   static uint in_preserve_stack_slots();
489 
490   // Is vector's size (in bytes) bigger than a size saved by default?
491   // For example, on x86 16 bytes XMM registers are saved by default.
492   static bool is_wide_vector(int size);
493 
494   // Save and restore a native result
495   static void    save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
496   static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
497 
498   // Generate a native wrapper for a given method.  The method takes arguments
499   // in the Java compiled code convention, marshals them to the native
500   // convention (handlizes oops, etc), transitions to native, makes the call,
501   // returns to java state (possibly blocking), unhandlizes any result and
502   // returns.
503   //
504   // The wrapper may contain special-case code if the given method
505   // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
506   static nmethod* generate_native_wrapper(MacroAssembler* masm,
507                                           const methodHandle& method,
508                                           int compile_id,
509                                           BasicType* sig_bt,
510                                           VMRegPair* regs,
511                                           BasicType ret_type);
512 
513   // A compiled caller has just called the interpreter, but compiled code
514   // exists.  Patch the caller so he no longer calls into the interpreter.
515   static void fixup_callers_callsite(Method* moop, address ret_pc);
516   static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
517 
518   // Slow-path Locking and Unlocking
519   static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
520   static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
521 
522   // Resolving of calls
523   static address resolve_static_call_C     (JavaThread* current);
524   static address resolve_virtual_call_C    (JavaThread* current);
525   static address resolve_opt_virtual_call_C(JavaThread* current);
526 
527   static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res);
528   static void store_inline_type_fields_to_buf(JavaThread* current, intptr_t res);
529 
530   // arraycopy, the non-leaf version.  (See StubRoutines for all the leaf calls.)
531   static void slow_arraycopy_C(oopDesc* src,  jint src_pos,
532                                oopDesc* dest, jint dest_pos,
533                                jint length, JavaThread* thread);
534 
535   // handle ic miss with caller being compiled code
536   // wrong method handling (inline cache misses)
537   static address handle_wrong_method(JavaThread* current);
538   static address handle_wrong_method_abstract(JavaThread* current);
539   static address handle_wrong_method_ic_miss(JavaThread* current);
540   static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver);
541   static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS);
542 
543   static address handle_unsafe_access(JavaThread* thread, address next_pc);
544 
545   static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* vk);
546 #ifndef PRODUCT
547 
548   // Collect and print inline cache miss statistics
549  private:
550   enum { maxICmiss_count = 100 };
551   static int     _ICmiss_index;                  // length of IC miss histogram
552   static int     _ICmiss_count[maxICmiss_count]; // miss counts
553   static address _ICmiss_at[maxICmiss_count];    // miss addresses
554   static void trace_ic_miss(address at);
555 
556  public:
557   static uint _ic_miss_ctr;                      // total # of IC misses
558   static uint _wrong_method_ctr;
559   static uint _resolve_static_ctr;
560   static uint _resolve_virtual_ctr;
561   static uint _resolve_opt_virtual_ctr;
562   static uint _implicit_null_throws;
563   static uint _implicit_div0_throws;
564 
565   static uint _jbyte_array_copy_ctr;       // Slow-path byte array copy
566   static uint _jshort_array_copy_ctr;      // Slow-path short array copy
567   static uint _jint_array_copy_ctr;        // Slow-path int array copy
568   static uint _jlong_array_copy_ctr;       // Slow-path long array copy
569   static uint _oop_array_copy_ctr;         // Slow-path oop array copy
570   static uint _checkcast_array_copy_ctr;   // Slow-path oop array copy, with cast
571   static uint _unsafe_array_copy_ctr;      // Slow-path includes alignment checks
572   static uint _generic_array_copy_ctr;     // Slow-path includes type decoding
573   static uint _slow_array_copy_ctr;        // Slow-path failed out to a method call
574 
575   static uint _new_instance_ctr;           // 'new' object requires GC
576   static uint _new_array_ctr;              // 'new' array requires GC
577   static uint _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
578   static uint _find_handler_ctr;           // find exception handler
579   static uint _rethrow_ctr;                // rethrow exception
580   static uint _mon_enter_stub_ctr;         // monitor enter stub
581   static uint _mon_exit_stub_ctr;          // monitor exit stub
582   static uint _mon_enter_ctr;              // monitor enter slow
583   static uint _mon_exit_ctr;               // monitor exit slow
584   static uint _partial_subtype_ctr;        // SubRoutines::partial_subtype_check
585 
586   // Statistics code
587   // stats for "normal" compiled calls (non-interface)
588   static int64_t _nof_normal_calls;               // total # of calls
589   static int64_t _nof_inlined_calls;              // total # of inlined normal calls
590   static int64_t _nof_static_calls;               // total # of calls to static methods or super methods (invokespecial)
591   static int64_t _nof_inlined_static_calls;       // total # of inlined static calls
592   // stats for compiled interface calls
593   static int64_t _nof_interface_calls;            // total # of compiled calls
594   static int64_t _nof_inlined_interface_calls;    // total # of inlined interface calls
595 
596  public: // for compiler
597   static address nof_normal_calls_addr()                { return (address)&_nof_normal_calls; }
598   static address nof_inlined_calls_addr()               { return (address)&_nof_inlined_calls; }
599   static address nof_static_calls_addr()                { return (address)&_nof_static_calls; }
600   static address nof_inlined_static_calls_addr()        { return (address)&_nof_inlined_static_calls; }
601   static address nof_interface_calls_addr()             { return (address)&_nof_interface_calls; }
602   static address nof_inlined_interface_calls_addr()     { return (address)&_nof_inlined_interface_calls; }
603   static void print_call_statistics(uint64_t comp_total);
604   static void print_ic_miss_histogram();
605 
606 #endif // PRODUCT
607 
608   static void print_statistics() PRODUCT_RETURN;
609 };
610 
611 
612 // ---------------------------------------------------------------------------
613 // Implementation of AdapterHandlerLibrary
614 //
615 // This library manages argument marshaling adapters and native wrappers.
616 // There are 2 flavors of adapters: I2C and C2I.
617 //
618 // The I2C flavor takes a stock interpreted call setup, marshals the
619 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
620 // code_begin().  It is broken to call it without an nmethod assigned.
621 // The usual behavior is to lift any register arguments up out of the
622 // stack and possibly re-pack the extra arguments to be contiguous.
623 // I2C adapters will save what the interpreter's stack pointer will be
624 // after arguments are popped, then adjust the interpreter's frame
625 // size to force alignment and possibly to repack the arguments.
626 // After re-packing, it jumps to the compiled code start.  There are
627 // no safepoints in this adapter code and a GC cannot happen while
628 // marshaling is in progress.
629 //
630 // The C2I flavor takes a stock compiled call setup plus the target method in
631 // Rmethod, marshals the arguments for an interpreted call and jumps to
632 // Rmethod->_i2i_entry.  On entry, the interpreted frame has not yet been
633 // setup.  Compiled frames are fixed-size and the args are likely not in the
634 // right place.  Hence all the args will likely be copied into the
635 // interpreter's frame, forcing that frame to grow.  The compiled frame's
636 // outgoing stack args will be dead after the copy.
637 //
638 // Native wrappers, like adapters, marshal arguments.  Unlike adapters they
639 // also perform an official frame push & pop.  They have a call to the native
640 // routine in their middles and end in a return (instead of ending in a jump).
641 // The native wrappers are stored in real nmethods instead of the BufferBlobs
642 // used by the adapters.  The code generation happens here because it's very
643 // similar to what the adapters have to do.
644 
645 class AdapterHandlerEntry : public CHeapObj<mtCode> {
646   friend class AdapterHandlerLibrary;
647 
648  private:
649   AdapterFingerPrint* _fingerprint;
650   address _i2c_entry;
651   address _c2i_entry;
652   address _c2i_inline_entry;
653   address _c2i_inline_ro_entry;
654   address _c2i_unverified_entry;
655   address _c2i_unverified_inline_entry;
656   address _c2i_no_clinit_check_entry;
657 
658   // Support for scalarized inline type calling convention
659   const GrowableArray<SigEntry>* _sig_cc;
660 
661 #ifdef ASSERT
662   // Captures code and signature used to generate this adapter when
663   // verifying adapter equivalence.
664   unsigned char* _saved_code;
665   int            _saved_code_length;
666 #endif
667 
668   AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
669                       address c2i_inline_entry, address c2i_inline_ro_entry,
670                       address c2i_unverified_entry, address c2i_unverified_inline_entry,
671                       address c2i_no_clinit_check_entry) :
672     _fingerprint(fingerprint),
673     _i2c_entry(i2c_entry),
674     _c2i_entry(c2i_entry),
675     _c2i_inline_entry(c2i_inline_entry),
676     _c2i_inline_ro_entry(c2i_inline_ro_entry),
677     _c2i_unverified_entry(c2i_unverified_entry),
678     _c2i_unverified_inline_entry(c2i_unverified_inline_entry),
679     _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry),
680     _sig_cc(nullptr)
681 #ifdef ASSERT
682     , _saved_code_length(0)
683 #endif
684   { }
685 
686   ~AdapterHandlerEntry();
687 
688  public:
689   address get_i2c_entry()                   const { return _i2c_entry; }
690   address get_c2i_entry()                   const { return _c2i_entry; }
691   address get_c2i_inline_entry()            const { return _c2i_inline_entry; }
692   address get_c2i_inline_ro_entry()         const { return _c2i_inline_ro_entry; }
693   address get_c2i_unverified_entry()        const { return _c2i_unverified_entry; }
694   address get_c2i_unverified_inline_entry() const { return _c2i_unverified_inline_entry; }
695   address get_c2i_no_clinit_check_entry()   const { return _c2i_no_clinit_check_entry; }
696 
697   address base_address();
698   void relocate(address new_base);
699 
700   // Support for scalarized inline type calling convention
701   void set_sig_cc(const GrowableArray<SigEntry>* sig)  { _sig_cc = sig; }
702   const GrowableArray<SigEntry>* get_sig_cc()    const { return _sig_cc; }
703 
704   AdapterFingerPrint* fingerprint() const { return _fingerprint; }
705 
706 #ifdef ASSERT
707   // Used to verify that code generated for shared adapters is equivalent
708   void save_code   (unsigned char* code, int length);
709   bool compare_code(AdapterHandlerEntry* other);
710 #endif
711 
712   //virtual void print_on(outputStream* st) const;  DO NOT USE
713   void print_adapter_on(outputStream* st) const;
714 };
715 
716 class CompiledEntrySignature;
717 
718 class AdapterHandlerLibrary: public AllStatic {
719   friend class SharedRuntime;
720  private:
721   static BufferBlob* _buffer; // the temporary code buffer in CodeCache
722   static AdapterHandlerEntry* _abstract_method_handler;
723   static AdapterHandlerEntry* _no_arg_handler;
724   static AdapterHandlerEntry* _int_arg_handler;
725   static AdapterHandlerEntry* _obj_arg_handler;
726   static AdapterHandlerEntry* _obj_int_arg_handler;
727   static AdapterHandlerEntry* _obj_obj_arg_handler;
728 
729   static BufferBlob* buffer_blob();
730   static void initialize();
731   static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
732                                              CompiledEntrySignature& ces,
733                                              bool allocate_code_blob);
734   static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
735  public:
736 
737   static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
738                                         address i2c_entry, address c2i_entry, address c2i_inline_entry, address c2i_inline_ro_entry,
739                                         address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry = nullptr);
740   static void create_native_wrapper(const methodHandle& method);
741   static AdapterHandlerEntry* get_adapter(const methodHandle& method);
742 
743   static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
744   static void print_handler_on(outputStream* st, const CodeBlob* b);
745   static bool contains(const CodeBlob* b);
746 #ifndef PRODUCT
747   static void print_statistics();
748 #endif // PRODUCT
749 
750 };
751 
752 // Utility class for computing the calling convention of the 3 types
753 // of compiled method entries:
754 //     Method::_from_compiled_entry               - sig_cc
755 //     Method::_from_compiled_inline_ro_entry     - sig_cc_ro
756 //     Method::_from_compiled_inline_entry        - sig
757 class CompiledEntrySignature : public StackObj {
758   Method* _method;
759   int  _num_inline_args;
760   bool _has_inline_recv;
761   GrowableArray<SigEntry>* _sig;
762   GrowableArray<SigEntry>* _sig_cc;
763   GrowableArray<SigEntry>* _sig_cc_ro;
764   VMRegPair* _regs;
765   VMRegPair* _regs_cc;
766   VMRegPair* _regs_cc_ro;
767 
768   int _args_on_stack;
769   int _args_on_stack_cc;
770   int _args_on_stack_cc_ro;
771 
772   bool _c1_needs_stack_repair;
773   bool _c2_needs_stack_repair;
774 
775   GrowableArray<Method*>* _supers;
776 
777 public:
778   Method* method()                     const { return _method; }
779 
780   // Used by Method::_from_compiled_inline_entry
781   GrowableArray<SigEntry>* sig()       const { return _sig; }
782 
783   // Used by Method::_from_compiled_entry
784   GrowableArray<SigEntry>* sig_cc()    const { return _sig_cc; }
785 
786   // Used by Method::_from_compiled_inline_ro_entry
787   GrowableArray<SigEntry>* sig_cc_ro() const { return _sig_cc_ro; }
788 
789   VMRegPair* regs()                    const { return _regs; }
790   VMRegPair* regs_cc()                 const { return _regs_cc; }
791   VMRegPair* regs_cc_ro()              const { return _regs_cc_ro; }
792 
793   int args_on_stack()                  const { return _args_on_stack; }
794   int args_on_stack_cc()               const { return _args_on_stack_cc; }
795   int args_on_stack_cc_ro()            const { return _args_on_stack_cc_ro; }
796 
797   int  num_inline_args()               const { return _num_inline_args; }
798   bool has_inline_recv()               const { return _has_inline_recv; }
799 
800   bool has_scalarized_args()           const { return _sig != _sig_cc; }
801   bool c1_needs_stack_repair()         const { return _c1_needs_stack_repair; }
802   bool c2_needs_stack_repair()         const { return _c2_needs_stack_repair; }
803   CodeOffsets::Entries c1_inline_ro_entry_type() const;
804 
805   GrowableArray<Method*>* get_supers();
806 
807   CompiledEntrySignature(Method* method = nullptr);
808   void compute_calling_conventions(bool init = true);
809 };
810 
811 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP