1 /*
2 * Copyright (c) 1997, 2024, 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 "code/codeBlob.hpp"
29 #include "code/vmreg.hpp"
30 #include "interpreter/linkResolver.hpp"
31 #include "memory/allStatic.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "runtime/stubDeclarations.hpp"
34 #include "utilities/macros.hpp"
35
36 class AdapterHandlerEntry;
37 class AdapterFingerPrint;
38 class vframeStream;
39 class ObjectWaiter;
40
41 // Runtime is the base class for various runtime interfaces
42 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
43 // shared functionality such as exception forwarding (C++ to
44 // Java exceptions), locking/unlocking mechanisms, statistical
45 // information, etc.
46
47 // define SharedStubId enum tags: wrong_method_id, etc
48
49 #define SHARED_STUB_ID_ENUM_DECLARE(name, type) STUB_ID_NAME(name),
50 enum class SharedStubId :int {
51 NO_STUBID = -1,
52 SHARED_STUBS_DO(SHARED_STUB_ID_ENUM_DECLARE)
53 NUM_STUBIDS
54 };
55 #undef SHARED_STUB_ID_ENUM_DECLARE
56
57 class SharedRuntime: AllStatic {
58 friend class VMStructs;
59
60 private:
61 // Declare shared stub fields
62 #define SHARED_STUB_FIELD_DECLARE(name, type) \
63 static type BLOB_FIELD_NAME(name);
64 SHARED_STUBS_DO(SHARED_STUB_FIELD_DECLARE)
65 #undef SHARED_STUB_FIELD_DECLARE
66
67 #ifdef ASSERT
68 static bool is_resolve_id(SharedStubId id) {
69 return (id == SharedStubId::wrong_method_id ||
70 id == SharedStubId::wrong_method_abstract_id ||
71 id == SharedStubId::ic_miss_id ||
72 id == SharedStubId::resolve_opt_virtual_call_id ||
73 id == SharedStubId::resolve_virtual_call_id ||
74 id == SharedStubId::resolve_static_call_id);
75 }
76 static bool is_polling_page_id(SharedStubId id) {
77 return (id == SharedStubId::polling_page_vectors_safepoint_handler_id ||
78 id == SharedStubId::polling_page_safepoint_handler_id ||
79 id == SharedStubId::polling_page_return_handler_id);
80 }
81 static bool is_throw_id(SharedStubId id) {
82 return (id == SharedStubId::throw_AbstractMethodError_id ||
83 id == SharedStubId::throw_IncompatibleClassChangeError_id ||
84 id == SharedStubId::throw_NullPointerException_at_call_id ||
85 id == SharedStubId::throw_StackOverflowError_id ||
86 id == SharedStubId::throw_delayed_StackOverflowError_id);
87 }
88 #endif
89
90 static int _object_wait_resume_offset;
91
92 // cont_doYieldStub is not yet folded into the general model for
93 // shared stub/blob handling. It is actually a specially generated
94 // native wrapper for a specific native method, as also is it's
95 // counterpart the continuation do_enter method.
96 static nmethod* _cont_doYield_stub;
97
98 // Stub names indexed by SharedStubId
99 static const char *_stub_names[];
100
101 #ifndef PRODUCT
102 // Counters
103 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
104 #endif // !PRODUCT
105
106 private:
107 static SafepointBlob* generate_handler_blob(SharedStubId id, address call_ptr);
108 static RuntimeStub* generate_resolve_blob(SharedStubId id, address destination);
109 static RuntimeStub* generate_throw_exception(SharedStubId id, address runtime_entry);
110 public:
111 static void generate_initial_stubs(void);
112 static void generate_stubs(void);
113 #if INCLUDE_JFR
114 static void generate_jfr_stubs(void);
115 // For c2: c_rarg0 is junk, call to runtime to write a checkpoint.
116 // It returns a jobject handle to the event writer.
117 // The handle is dereferenced and the return value is the event writer oop.
118 static RuntimeStub* generate_jfr_write_checkpoint();
119 // For c2: call to runtime to return a buffer lease.
120 static RuntimeStub* generate_jfr_return_lease();
121 #endif
122
123 static const char *stub_name(SharedStubId id) {
124 assert(id > SharedStubId::NO_STUBID && id < SharedStubId::NUM_STUBIDS, "stub id out of range");
125 return _stub_names[(int)id];
126 }
127
128 // max bytes for each dtrace string parameter
129 enum { max_dtrace_string_size = 256 };
130
131 // The following arithmetic routines are used on platforms that do
132 // not have machine instructions to implement their functionality.
133 // Do not remove these.
134
135 // long arithmetics
136 static jlong lmul(jlong y, jlong x);
137 static jlong ldiv(jlong y, jlong x);
138 static jlong lrem(jlong y, jlong x);
139
140 // float and double remainder
141 static jfloat frem(jfloat x, jfloat y);
142 static jdouble drem(jdouble x, jdouble y);
143
144
145 #ifdef _WIN64
146 // Workaround for fmod issue in the Windows x64 CRT
147 static double fmod_winx64(double x, double y);
148 #endif
149
150 #ifdef __SOFTFP__
151 static jfloat fadd(jfloat x, jfloat y);
152 static jfloat fsub(jfloat x, jfloat y);
153 static jfloat fmul(jfloat x, jfloat y);
154 static jfloat fdiv(jfloat x, jfloat y);
155
156 static jdouble dadd(jdouble x, jdouble y);
157 static jdouble dsub(jdouble x, jdouble y);
158 static jdouble dmul(jdouble x, jdouble y);
159 static jdouble ddiv(jdouble x, jdouble y);
160 #endif // __SOFTFP__
161
162 // float conversion (needs to set appropriate rounding mode)
163 static jint f2i (jfloat x);
164 static jlong f2l (jfloat x);
165 static jint d2i (jdouble x);
166 static jlong d2l (jdouble x);
167 static jfloat d2f (jdouble x);
168 static jfloat l2f (jlong x);
169 static jdouble l2d (jlong x);
170 static jfloat i2f (jint x);
171
172 #ifdef __SOFTFP__
173 static jdouble i2d (jint x);
174 static jdouble f2d (jfloat x);
175 #endif // __SOFTFP__
176
177 // double trigonometrics and transcendentals
178 static jdouble dsin(jdouble x);
179 static jdouble dcos(jdouble x);
180 static jdouble dtan(jdouble x);
181 static jdouble dlog(jdouble x);
182 static jdouble dlog10(jdouble x);
183 static jdouble dexp(jdouble x);
184 static jdouble dpow(jdouble x, jdouble y);
185
186 #if defined(__SOFTFP__) || defined(E500V2)
187 static double dabs(double f);
188 #endif
189
190 #if defined(__SOFTFP__) || defined(PPC)
191 static double dsqrt(double f);
192 #endif
193
194 // Montgomery multiplication
195 static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints,
196 jint len, jlong inv, jint *m_ints);
197 static void montgomery_square(jint *a_ints, jint *n_ints,
198 jint len, jlong inv, jint *m_ints);
199
200 #ifdef __SOFTFP__
201 // C++ compiler generates soft float instructions as well as passing
202 // float and double in registers.
203 static int fcmpl(float x, float y);
204 static int fcmpg(float x, float y);
205 static int dcmpl(double x, double y);
206 static int dcmpg(double x, double y);
207
208 static int unordered_fcmplt(float x, float y);
209 static int unordered_dcmplt(double x, double y);
210 static int unordered_fcmple(float x, float y);
211 static int unordered_dcmple(double x, double y);
212 static int unordered_fcmpge(float x, float y);
213 static int unordered_dcmpge(double x, double y);
214 static int unordered_fcmpgt(float x, float y);
215 static int unordered_dcmpgt(double x, double y);
216
217 static float fneg(float f);
218 static double dneg(double f);
219 #endif
220
221 // exception handling across interpreter/compiler boundaries
222 static address raw_exception_handler_for_return_address(JavaThread* current, address return_address);
223 static address exception_handler_for_return_address(JavaThread* current, address return_address);
224
225 // exception handling and implicit exceptions
226 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
227 bool force_unwind, bool top_frame_only, bool& recursive_exception_occurred);
228 enum ImplicitExceptionKind {
229 IMPLICIT_NULL,
230 IMPLICIT_DIVIDE_BY_ZERO,
231 STACK_OVERFLOW
232 };
233 static void throw_AbstractMethodError(JavaThread* current);
234 static void throw_IncompatibleClassChangeError(JavaThread* current);
235 static void throw_ArithmeticException(JavaThread* current);
236 static void throw_NullPointerException(JavaThread* current);
237 static void throw_NullPointerException_at_call(JavaThread* current);
238 static void throw_StackOverflowError(JavaThread* current);
239 static void throw_delayed_StackOverflowError(JavaThread* current);
240 static void throw_StackOverflowError_common(JavaThread* current, bool delayed);
241 static address continuation_for_implicit_exception(JavaThread* current,
242 address faulting_pc,
243 ImplicitExceptionKind exception_kind);
244
245 static int object_wait_resume_offset() { return _object_wait_resume_offset; }
246 static void set_object_wait_resume_offset(int offset) {
247 _object_wait_resume_offset = offset;
248 }
249
250 // Post-slow-path-allocation, pre-initializing-stores step for
251 // implementing e.g. ReduceInitialCardMarks
252 static void on_slowpath_allocation_exit(JavaThread* current);
253
254 static void enable_stack_reserved_zone(JavaThread* current);
255 static frame look_for_reserved_stack_annotated_method(JavaThread* current, frame fr);
256
257 // Shared stub locations
258 static address get_poll_stub(address pc);
259
260 static address get_ic_miss_stub() {
261 assert(_ic_miss_blob!= nullptr, "oops");
262 return _ic_miss_blob->entry_point();
263 }
264
265 static address get_handle_wrong_method_stub() {
266 assert(_wrong_method_blob!= nullptr, "oops");
267 return _wrong_method_blob->entry_point();
268 }
269
270 static address get_handle_wrong_method_abstract_stub() {
271 assert(_wrong_method_abstract_blob!= nullptr, "oops");
272 return _wrong_method_abstract_blob->entry_point();
273 }
274
275 static address get_resolve_opt_virtual_call_stub() {
276 assert(_resolve_opt_virtual_call_blob != nullptr, "oops");
277 return _resolve_opt_virtual_call_blob->entry_point();
278 }
279 static address get_resolve_virtual_call_stub() {
280 assert(_resolve_virtual_call_blob != nullptr, "oops");
281 return _resolve_virtual_call_blob->entry_point();
282 }
283 static address get_resolve_static_call_stub() {
284 assert(_resolve_static_call_blob != nullptr, "oops");
285 return _resolve_static_call_blob->entry_point();
286 }
287
288 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
289 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
290 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; }
291
292 static nmethod* cont_doYield_stub() {
293 assert(_cont_doYield_stub != nullptr, "oops");
294 return _cont_doYield_stub;
295 }
296
297 // Implicit exceptions
298 static address throw_AbstractMethodError_entry() { return _throw_AbstractMethodError_blob->entry_point(); }
299 static address throw_IncompatibleClassChangeError_entry() { return _throw_IncompatibleClassChangeError_blob->entry_point(); }
300 static address throw_NullPointerException_at_call_entry() { return _throw_NullPointerException_at_call_blob->entry_point(); }
301 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_blob->entry_point(); }
302 static address throw_delayed_StackOverflowError_entry() { return _throw_delayed_StackOverflowError_blob->entry_point(); }
303
304 #if INCLUDE_JFR
305 static address jfr_write_checkpoint() { return _jfr_write_checkpoint_blob->entry_point(); }
306 static address jfr_return_lease() { return _jfr_return_lease_blob->entry_point(); }
307 #endif
308
309 // Counters
310 #ifndef PRODUCT
311 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
312 #endif // PRODUCT
313
314 // Helper routine for full-speed JVMTI exception throwing support
315 static void throw_and_post_jvmti_exception(JavaThread* current, Handle h_exception);
316 static void throw_and_post_jvmti_exception(JavaThread* current, Symbol* name, const char *message = nullptr);
317
318 #if INCLUDE_JVMTI
319 // Functions for JVMTI notifications
320 static void notify_jvmti_vthread_start(oopDesc* vt, jboolean hide, JavaThread* current);
321 static void notify_jvmti_vthread_end(oopDesc* vt, jboolean hide, JavaThread* current);
322 static void notify_jvmti_vthread_mount(oopDesc* vt, jboolean hide, JavaThread* current);
323 static void notify_jvmti_vthread_unmount(oopDesc* vt, jboolean hide, JavaThread* current);
324 #endif
325
326 // RedefineClasses() tracing support for obsolete method entry
327 static int rc_trace_method_entry(JavaThread* thread, Method* m);
328
329 // To be used as the entry point for unresolved native methods.
330 static address native_method_throw_unsatisfied_link_error_entry();
331
332 static void register_finalizer(JavaThread* thread, oopDesc* obj);
333
334 // dtrace notifications
335 static int dtrace_object_alloc(oopDesc* o);
336 static int dtrace_object_alloc(JavaThread* thread, oopDesc* o);
337 static int dtrace_object_alloc(JavaThread* thread, oopDesc* o, size_t size);
338 static int dtrace_method_entry(JavaThread* thread, Method* m);
339 static int dtrace_method_exit(JavaThread* thread, Method* m);
340
341 // Utility method for retrieving the Java thread id, returns 0 if the
342 // thread is not a well formed Java thread.
343 static jlong get_java_tid(JavaThread* thread);
344
345
346 // used by native wrappers to re-enable yellow if overflow happened in native code
347 static void reguard_yellow_pages();
348
349 // Fill in the "X cannot be cast to a Y" message for ClassCastException
350 //
351 // @param thr the current thread
352 // @param caster_klass the class of the object we are casting
353 // @return the dynamically allocated exception message (must be freed
354 // by the caller using a resource mark)
355 //
356 // BCP must refer to the current 'checkcast' opcode for the frame
357 // on top of the stack.
358 // The caller (or one of its callers) must use a ResourceMark
359 // in order to correctly free the result.
360 //
361 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
362
363 // Fill in the "X cannot be cast to a Y" message for ClassCastException
364 //
365 // @param caster_klass the class of the object we are casting
366 // @param target_klass the target klass attempt
367 // @return the dynamically allocated exception message (must be freed
368 // by the caller using a resource mark)
369 //
370 // This version does not require access the frame, so it can be called
371 // from interpreted code
372 // The caller (or one of it's callers) must use a ResourceMark
373 // in order to correctly free the result.
374 //
375 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr);
376
377 // Resolves a call site- may patch in the destination of the call into the
378 // compiled code.
379 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, TRAPS);
380
381 private:
382 // deopt blob
383 static void generate_deopt_blob(void);
384
385 static bool handle_ic_miss_helper_internal(Handle receiver, nmethod* caller_nm, const frame& caller_frame,
386 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
387 bool& needs_ic_stub_refill, TRAPS);
388
389 public:
390 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
391
392 // Resets a call-site in compiled code so it will get resolved again.
393 static methodHandle reresolve_call_site(TRAPS);
394
395 // In the code prolog, if the klass comparison fails, the inline cache
396 // misses and the call site is patched to megamorphic
397 static methodHandle handle_ic_miss_helper(TRAPS);
398
399 // Find the method that called us.
400 static methodHandle find_callee_method(TRAPS);
401
402 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
403
404 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
405
406 // Issue UL warning for unlocked JNI monitor on virtual thread termination
407 static void log_jni_monitor_still_held();
408
409 private:
410 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
411 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
412
413 static Method* extract_attached_method(vframeStream& vfst);
414
415 #if defined(X86) && defined(COMPILER1)
416 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
417 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
418 #endif // X86 && COMPILER1
419
420 public:
421
422 // Read the array of BasicTypes from a Java signature, and compute where
423 // compiled Java code would like to put the results. Values in reg_lo and
424 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
425 // registers, those above refer to 4-byte stack slots. All stack slots are
426 // based off of the window top. SharedInfo::stack0 refers to the first usable
427 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
428 // 4-bytes higher.
429 // return value is the maximum number of VMReg stack slots the convention will use.
430 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
431
432 static void check_member_name_argument_is_last_argument(const methodHandle& method,
433 const BasicType* sig_bt,
434 const VMRegPair* regs) NOT_DEBUG_RETURN;
435
436 // Ditto except for calling C
437 //
438 // C argument in register AND stack slot.
439 // Some architectures require that an argument must be passed in a register
440 // AND in a stack slot. These architectures provide a second VMRegPair array
441 // to be filled by the c_calling_convention method. On other architectures,
442 // null is being passed as the second VMRegPair array, so arguments are either
443 // passed in a register OR in a stack slot.
444 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
445
446 static int vector_calling_convention(VMRegPair *regs,
447 uint num_bits,
448 uint total_args_passed);
449
450 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
451 // blobs. Unlike adapters in the tiger and earlier releases the code in these
452 // blobs does not create a new frame and are therefore virtually invisible
453 // to the stack walking code. In general these blobs extend the callers stack
454 // as needed for the conversion of argument locations.
455
456 // When calling a c2i blob the code will always call the interpreter even if
457 // by the time we reach the blob there is compiled code available. This allows
458 // the blob to pass the incoming stack pointer (the sender sp) in a known
459 // location for the interpreter to record. This is used by the frame code
460 // to correct the sender code to match up with the stack pointer when the
461 // thread left the compiled code. In addition it allows the interpreter
462 // to remove the space the c2i adapter allocated to do its argument conversion.
463
464 // Although a c2i blob will always run interpreted even if compiled code is
465 // present if we see that compiled code is present the compiled call site
466 // will be patched/re-resolved so that later calls will run compiled.
467
468 // Additionally a c2i blob need to have a unverified entry because it can be reached
469 // in situations where the call site is an inlined cache site and may go megamorphic.
470
471 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
472 // that the interpreter before it does any call dispatch will record the current
473 // stack pointer in the interpreter frame. On return it will restore the stack
474 // pointer as needed. This means the i2c adapter code doesn't need any special
475 // handshaking path with compiled code to keep the stack walking correct.
476
477 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
478 int total_args_passed,
479 int max_arg,
480 const BasicType *sig_bt,
481 const VMRegPair *regs,
482 AdapterFingerPrint* fingerprint);
483
484 static void gen_i2c_adapter(MacroAssembler *_masm,
485 int total_args_passed,
486 int comp_args_on_stack,
487 const BasicType *sig_bt,
488 const VMRegPair *regs);
489
490 // OSR support
491
492 // OSR_migration_begin will extract the jvm state from an interpreter
493 // frame (locals, monitors) and store the data in a piece of C heap
494 // storage. This then allows the interpreter frame to be removed from the
495 // stack and the OSR nmethod to be called. That method is called with a
496 // pointer to the C heap storage. This pointer is the return value from
497 // OSR_migration_begin.
498
499 static intptr_t* OSR_migration_begin(JavaThread *thread);
500
501 // OSR_migration_end is a trivial routine. It is called after the compiled
502 // method has extracted the jvm state from the C heap that OSR_migration_begin
503 // created. It's entire job is to simply free this storage.
504 static void OSR_migration_end(intptr_t* buf);
505
506 // Convert a sig into a calling convention register layout
507 // and find interesting things about it.
508 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
509 static VMReg name_for_receiver();
510
511 // "Top of Stack" slots that may be unused by the calling convention but must
512 // otherwise be preserved.
513 // On Intel these are not necessary and the value can be zero.
514 // On Sparc this describes the words reserved for storing a register window
515 // when an interrupt occurs.
516 static uint out_preserve_stack_slots();
517
518 // Stack slots that may be unused by the calling convention but must
519 // otherwise be preserved. On Intel this includes the return address.
520 // On PowerPC it includes the 4 words holding the old TOC & LR glue.
521 static uint in_preserve_stack_slots();
522
523 static VMReg thread_register();
524
525 static void continuation_enter_cleanup(MacroAssembler* masm);
526
527 // Is vector's size (in bytes) bigger than a size saved by default?
528 // For example, on x86 16 bytes XMM registers are saved by default.
529 static bool is_wide_vector(int size);
530
531 // Save and restore a native result
532 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
533 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
534
535 // Generate a native wrapper for a given method. The method takes arguments
536 // in the Java compiled code convention, marshals them to the native
537 // convention (handlizes oops, etc), transitions to native, makes the call,
538 // returns to java state (possibly blocking), unhandlizes any result and
539 // returns.
540 //
541 // The wrapper may contain special-case code if the given method
542 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
543 static nmethod* generate_native_wrapper(MacroAssembler* masm,
544 const methodHandle& method,
545 int compile_id,
546 BasicType* sig_bt,
547 VMRegPair* regs,
548 BasicType ret_type);
549
550 // A compiled caller has just called the interpreter, but compiled code
551 // exists. Patch the caller so he no longer calls into the interpreter.
552 static void fixup_callers_callsite(Method* moop, address ret_pc);
553 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
554
555 // Slow-path Locking and Unlocking
556 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
557 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
558
559 // Resolving of calls
560 static address get_resolved_entry (JavaThread* current, methodHandle callee_method);
561 static address resolve_static_call_C (JavaThread* current);
562 static address resolve_virtual_call_C (JavaThread* current);
563 static address resolve_opt_virtual_call_C(JavaThread* current);
564
565 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
566 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
567 oopDesc* dest, jint dest_pos,
568 jint length, JavaThread* thread);
569
570 // handle ic miss with caller being compiled code
571 // wrong method handling (inline cache misses)
572 static address handle_wrong_method(JavaThread* current);
573 static address handle_wrong_method_abstract(JavaThread* current);
574 static address handle_wrong_method_ic_miss(JavaThread* current);
575
576 static address handle_unsafe_access(JavaThread* thread, address next_pc);
577
578 #ifndef PRODUCT
579
580 // Collect and print inline cache miss statistics
581 private:
582 enum { maxICmiss_count = 100 };
583 static int _ICmiss_index; // length of IC miss histogram
584 static int _ICmiss_count[maxICmiss_count]; // miss counts
585 static address _ICmiss_at[maxICmiss_count]; // miss addresses
586 static void trace_ic_miss(address at);
587
588 public:
589 static uint _ic_miss_ctr; // total # of IC misses
590 static uint _wrong_method_ctr;
591 static uint _resolve_static_ctr;
592 static uint _resolve_virtual_ctr;
593 static uint _resolve_opt_virtual_ctr;
594 static uint _implicit_null_throws;
595 static uint _implicit_div0_throws;
596
597 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy
598 static uint _jshort_array_copy_ctr; // Slow-path short array copy
599 static uint _jint_array_copy_ctr; // Slow-path int array copy
600 static uint _jlong_array_copy_ctr; // Slow-path long array copy
601 static uint _oop_array_copy_ctr; // Slow-path oop array copy
602 static uint _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
603 static uint _unsafe_array_copy_ctr; // Slow-path includes alignment checks
604 static uint _generic_array_copy_ctr; // Slow-path includes type decoding
605 static uint _slow_array_copy_ctr; // Slow-path failed out to a method call
606
607 static uint _unsafe_set_memory_ctr; // Slow-path includes alignment checks
608
609 static uint _new_instance_ctr; // 'new' object requires GC
610 static uint _new_array_ctr; // 'new' array requires GC
611 static uint _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
612 static uint _find_handler_ctr; // find exception handler
613 static uint _rethrow_ctr; // rethrow exception
614 static uint _mon_enter_stub_ctr; // monitor enter stub
615 static uint _mon_exit_stub_ctr; // monitor exit stub
616 static uint _mon_enter_ctr; // monitor enter slow
617 static uint _mon_exit_ctr; // monitor exit slow
618 static uint _partial_subtype_ctr; // SubRoutines::partial_subtype_check
619
620 // Statistics code
621 // stats for "normal" compiled calls (non-interface)
622 static int64_t _nof_normal_calls; // total # of calls
623 static int64_t _nof_inlined_calls; // total # of inlined normal calls
624 static int64_t _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
625 static int64_t _nof_inlined_static_calls; // total # of inlined static calls
626 // stats for compiled interface calls
627 static int64_t _nof_interface_calls; // total # of compiled calls
628 static int64_t _nof_inlined_interface_calls; // total # of inlined interface calls
629
630 public: // for compiler
631 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
632 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
633 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
634 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
635 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
636 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
637 static void print_call_statistics(uint64_t comp_total);
638 static void print_ic_miss_histogram();
639
640 #endif // PRODUCT
641
642 static void print_statistics() PRODUCT_RETURN;
643 };
644
645
646 // ---------------------------------------------------------------------------
647 // Implementation of AdapterHandlerLibrary
648 //
649 // This library manages argument marshaling adapters and native wrappers.
650 // There are 2 flavors of adapters: I2C and C2I.
651 //
652 // The I2C flavor takes a stock interpreted call setup, marshals the
653 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
654 // code_begin(). It is broken to call it without an nmethod assigned.
655 // The usual behavior is to lift any register arguments up out of the
656 // stack and possibly re-pack the extra arguments to be contiguous.
657 // I2C adapters will save what the interpreter's stack pointer will be
658 // after arguments are popped, then adjust the interpreter's frame
659 // size to force alignment and possibly to repack the arguments.
660 // After re-packing, it jumps to the compiled code start. There are
661 // no safepoints in this adapter code and a GC cannot happen while
662 // marshaling is in progress.
663 //
664 // The C2I flavor takes a stock compiled call setup plus the target method in
665 // Rmethod, marshals the arguments for an interpreted call and jumps to
666 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
667 // setup. Compiled frames are fixed-size and the args are likely not in the
668 // right place. Hence all the args will likely be copied into the
669 // interpreter's frame, forcing that frame to grow. The compiled frame's
670 // outgoing stack args will be dead after the copy.
671 //
672 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
673 // also perform an official frame push & pop. They have a call to the native
674 // routine in their middles and end in a return (instead of ending in a jump).
675 // The native wrappers are stored in real nmethods instead of the BufferBlobs
676 // used by the adapters. The code generation happens here because it's very
677 // similar to what the adapters have to do.
678
679 class AdapterHandlerEntry : public CHeapObj<mtCode> {
680 friend class AdapterHandlerLibrary;
681
682 private:
683 AdapterFingerPrint* _fingerprint;
684 address _i2c_entry;
685 address _c2i_entry;
686 address _c2i_unverified_entry;
687 address _c2i_no_clinit_check_entry;
688
689 #ifdef ASSERT
690 // Captures code and signature used to generate this adapter when
691 // verifying adapter equivalence.
692 unsigned char* _saved_code;
693 int _saved_code_length;
694 #endif
695
696 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
697 address c2i_unverified_entry,
698 address c2i_no_clinit_check_entry) :
699 _fingerprint(fingerprint),
700 _i2c_entry(i2c_entry),
701 _c2i_entry(c2i_entry),
702 _c2i_unverified_entry(c2i_unverified_entry),
703 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry)
704 #ifdef ASSERT
705 , _saved_code_length(0)
706 #endif
707 { }
708
709 ~AdapterHandlerEntry();
710
711 public:
712 address get_i2c_entry() const { return _i2c_entry; }
713 address get_c2i_entry() const { return _c2i_entry; }
714 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
715 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
716
717 address base_address();
718 void relocate(address new_base);
719
720 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
721
722 #ifdef ASSERT
723 // Used to verify that code generated for shared adapters is equivalent
724 void save_code (unsigned char* code, int length);
725 bool compare_code(AdapterHandlerEntry* other);
726 #endif
727
728 //virtual void print_on(outputStream* st) const; DO NOT USE
729 void print_adapter_on(outputStream* st) const;
730 };
731
732 class AdapterHandlerLibrary: public AllStatic {
733 friend class SharedRuntime;
734 private:
735 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
736 static AdapterHandlerEntry* _abstract_method_handler;
737 static AdapterHandlerEntry* _no_arg_handler;
738 static AdapterHandlerEntry* _int_arg_handler;
739 static AdapterHandlerEntry* _obj_arg_handler;
740 static AdapterHandlerEntry* _obj_int_arg_handler;
741 static AdapterHandlerEntry* _obj_obj_arg_handler;
742
743 static BufferBlob* buffer_blob();
744 static void initialize();
745 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
746 int total_args_passed,
747 BasicType* sig_bt,
748 bool allocate_code_blob);
749 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
750 public:
751
752 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
753 address i2c_entry,
754 address c2i_entry,
755 address c2i_unverified_entry,
756 address c2i_no_clinit_check_entry = nullptr);
757 static void create_native_wrapper(const methodHandle& method);
758 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
759
760 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
761 static void print_handler_on(outputStream* st, const CodeBlob* b);
762 static bool contains(const CodeBlob* b);
763 #ifndef PRODUCT
764 static void print_statistics();
765 #endif // PRODUCT
766
767 };
768
769 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP