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
40 // Runtime is the base class for various runtime interfaces
41 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
42 // shared functionality such as exception forwarding (C++ to
43 // Java exceptions), locking/unlocking mechanisms, statistical
44 // information, etc.
45
46 // define SharedStubId enum tags: wrong_method_id, etc
47
48 #define SHARED_STUB_ID_ENUM_DECLARE(name, type) STUB_ID_NAME(name),
49 enum class SharedStubId :int {
50 NO_STUBID = -1,
51 SHARED_STUBS_DO(SHARED_STUB_ID_ENUM_DECLARE)
52 NUM_STUBIDS
53 };
54 #undef SHARED_STUB_ID_ENUM_DECLARE
55
56 class SharedRuntime: AllStatic {
57 friend class VMStructs;
58
59 private:
60 // Declare shared stub fields
61 #define SHARED_STUB_FIELD_DECLARE(name, type) \
62 static type BLOB_FIELD_NAME(name);
63 SHARED_STUBS_DO(SHARED_STUB_FIELD_DECLARE)
64 #undef SHARED_STUB_FIELD_DECLARE
65
66 #ifdef ASSERT
67 static bool is_resolve_id(SharedStubId id) {
68 return (id == SharedStubId::wrong_method_id ||
69 id == SharedStubId::wrong_method_abstract_id ||
70 id == SharedStubId::ic_miss_id ||
71 id == SharedStubId::resolve_opt_virtual_call_id ||
72 id == SharedStubId::resolve_virtual_call_id ||
73 id == SharedStubId::resolve_static_call_id);
74 }
75 static bool is_polling_page_id(SharedStubId id) {
76 return (id == SharedStubId::polling_page_vectors_safepoint_handler_id ||
77 id == SharedStubId::polling_page_safepoint_handler_id ||
78 id == SharedStubId::polling_page_return_handler_id);
79 }
80 static bool is_throw_id(SharedStubId id) {
81 return (id == SharedStubId::throw_AbstractMethodError_id ||
82 id == SharedStubId::throw_IncompatibleClassChangeError_id ||
83 id == SharedStubId::throw_NullPointerException_at_call_id ||
84 id == SharedStubId::throw_StackOverflowError_id ||
85 id == SharedStubId::throw_delayed_StackOverflowError_id);
86 }
87 #endif
88
89 // cont_doYieldStub is not yet folded into the general model for
90 // shared stub/blob handling. It is actually a specially generated
91 // native wrapper for a specific native method, as also is it's
92 // counterpart the continuation do_enter method.
93 static nmethod* _cont_doYield_stub;
94
95 // Stub names indexed by SharedStubId
96 static const char *_stub_names[];
97
98 #ifndef PRODUCT
99 // Counters
100 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
101 #endif // !PRODUCT
102
103 private:
104 static SafepointBlob* generate_handler_blob(SharedStubId id, address call_ptr);
105 static RuntimeStub* generate_resolve_blob(SharedStubId id, address destination);
106 static RuntimeStub* generate_throw_exception(SharedStubId id, address runtime_entry);
107 public:
108 static void generate_initial_stubs(void);
109 static void generate_stubs(void);
110 #if INCLUDE_JFR
111 static void generate_jfr_stubs(void);
112 // For c2: c_rarg0 is junk, call to runtime to write a checkpoint.
113 // It returns a jobject handle to the event writer.
114 // The handle is dereferenced and the return value is the event writer oop.
115 static RuntimeStub* generate_jfr_write_checkpoint();
116 // For c2: call to runtime to return a buffer lease.
117 static RuntimeStub* generate_jfr_return_lease();
118 #endif
119
120 static const char *stub_name(SharedStubId id) {
121 assert(id > SharedStubId::NO_STUBID && id < SharedStubId::NUM_STUBIDS, "stub id out of range");
122 return _stub_names[(int)id];
123 }
124
125 // max bytes for each dtrace string parameter
126 enum { max_dtrace_string_size = 256 };
127
128 // The following arithmetic routines are used on platforms that do
129 // not have machine instructions to implement their functionality.
130 // Do not remove these.
131
132 // long arithmetics
133 static jlong lmul(jlong y, jlong x);
134 static jlong ldiv(jlong y, jlong x);
135 static jlong lrem(jlong y, jlong x);
136
137 // float and double remainder
138 static jfloat frem(jfloat x, jfloat y);
139 static jdouble drem(jdouble x, jdouble y);
140
141
142 #ifdef _WIN64
143 // Workaround for fmod issue in the Windows x64 CRT
144 static double fmod_winx64(double x, double y);
145 #endif
146
147 #ifdef __SOFTFP__
148 static jfloat fadd(jfloat x, jfloat y);
149 static jfloat fsub(jfloat x, jfloat y);
150 static jfloat fmul(jfloat x, jfloat y);
151 static jfloat fdiv(jfloat x, jfloat y);
152
153 static jdouble dadd(jdouble x, jdouble y);
154 static jdouble dsub(jdouble x, jdouble y);
155 static jdouble dmul(jdouble x, jdouble y);
156 static jdouble ddiv(jdouble x, jdouble y);
157 #endif // __SOFTFP__
158
159 // float conversion (needs to set appropriate rounding mode)
160 static jint f2i (jfloat x);
161 static jlong f2l (jfloat x);
162 static jint d2i (jdouble x);
163 static jlong d2l (jdouble x);
164 static jfloat d2f (jdouble x);
165 static jfloat l2f (jlong x);
166 static jdouble l2d (jlong x);
167 static jfloat i2f (jint x);
168
169 #ifdef __SOFTFP__
170 static jdouble i2d (jint x);
171 static jdouble f2d (jfloat x);
172 #endif // __SOFTFP__
173
174 // double trigonometrics and transcendentals
175 static jdouble dsin(jdouble x);
176 static jdouble dcos(jdouble x);
177 static jdouble dtan(jdouble x);
178 static jdouble dlog(jdouble x);
179 static jdouble dlog10(jdouble x);
180 static jdouble dexp(jdouble x);
181 static jdouble dpow(jdouble x, jdouble y);
182
183 #if defined(__SOFTFP__) || defined(E500V2)
184 static double dabs(double f);
185 #endif
186
187 #if defined(__SOFTFP__) || defined(PPC)
188 static double dsqrt(double f);
189 #endif
190
191 // Montgomery multiplication
192 static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints,
193 jint len, jlong inv, jint *m_ints);
194 static void montgomery_square(jint *a_ints, jint *n_ints,
195 jint len, jlong inv, jint *m_ints);
196
197 #ifdef __SOFTFP__
198 // C++ compiler generates soft float instructions as well as passing
199 // float and double in registers.
200 static int fcmpl(float x, float y);
201 static int fcmpg(float x, float y);
202 static int dcmpl(double x, double y);
203 static int dcmpg(double x, double y);
204
205 static int unordered_fcmplt(float x, float y);
206 static int unordered_dcmplt(double x, double y);
207 static int unordered_fcmple(float x, float y);
208 static int unordered_dcmple(double x, double y);
209 static int unordered_fcmpge(float x, float y);
210 static int unordered_dcmpge(double x, double y);
211 static int unordered_fcmpgt(float x, float y);
212 static int unordered_dcmpgt(double x, double y);
213
214 static float fneg(float f);
215 static double dneg(double f);
216 #endif
217
218 // exception handling across interpreter/compiler boundaries
219 static address raw_exception_handler_for_return_address(JavaThread* current, address return_address);
220 static address exception_handler_for_return_address(JavaThread* current, address return_address);
221
222 // exception handling and implicit exceptions
223 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
224 bool force_unwind, bool top_frame_only, bool& recursive_exception_occurred);
225 enum ImplicitExceptionKind {
226 IMPLICIT_NULL,
227 IMPLICIT_DIVIDE_BY_ZERO,
228 STACK_OVERFLOW
229 };
230 static void throw_AbstractMethodError(JavaThread* current);
231 static void throw_IncompatibleClassChangeError(JavaThread* current);
232 static void throw_ArithmeticException(JavaThread* current);
233 static void throw_NullPointerException(JavaThread* current);
234 static void throw_NullPointerException_at_call(JavaThread* current);
235 static void throw_StackOverflowError(JavaThread* current);
236 static void throw_delayed_StackOverflowError(JavaThread* current);
237 static void throw_StackOverflowError_common(JavaThread* current, bool delayed);
238 static address continuation_for_implicit_exception(JavaThread* current,
239 address faulting_pc,
240 ImplicitExceptionKind exception_kind);
241
242 // Post-slow-path-allocation, pre-initializing-stores step for
243 // implementing e.g. ReduceInitialCardMarks
244 static void on_slowpath_allocation_exit(JavaThread* current);
245
246 static void enable_stack_reserved_zone(JavaThread* current);
247 static frame look_for_reserved_stack_annotated_method(JavaThread* current, frame fr);
248
249 // Shared stub locations
250 static address get_poll_stub(address pc);
251
252 static address get_ic_miss_stub() {
253 assert(_ic_miss_blob!= nullptr, "oops");
254 return _ic_miss_blob->entry_point();
255 }
256
257 static address get_handle_wrong_method_stub() {
258 assert(_wrong_method_blob!= nullptr, "oops");
259 return _wrong_method_blob->entry_point();
260 }
261
262 static address get_handle_wrong_method_abstract_stub() {
263 assert(_wrong_method_abstract_blob!= nullptr, "oops");
264 return _wrong_method_abstract_blob->entry_point();
265 }
266
267 static address get_resolve_opt_virtual_call_stub() {
268 assert(_resolve_opt_virtual_call_blob != nullptr, "oops");
269 return _resolve_opt_virtual_call_blob->entry_point();
270 }
271 static address get_resolve_virtual_call_stub() {
272 assert(_resolve_virtual_call_blob != nullptr, "oops");
273 return _resolve_virtual_call_blob->entry_point();
274 }
275 static address get_resolve_static_call_stub() {
276 assert(_resolve_static_call_blob != nullptr, "oops");
277 return _resolve_static_call_blob->entry_point();
278 }
279
280 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
281 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
282 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; }
283
284 static nmethod* cont_doYield_stub() {
285 assert(_cont_doYield_stub != nullptr, "oops");
286 return _cont_doYield_stub;
287 }
288
289 // Implicit exceptions
290 static address throw_AbstractMethodError_entry() { return _throw_AbstractMethodError_blob->entry_point(); }
291 static address throw_IncompatibleClassChangeError_entry() { return _throw_IncompatibleClassChangeError_blob->entry_point(); }
292 static address throw_NullPointerException_at_call_entry() { return _throw_NullPointerException_at_call_blob->entry_point(); }
293 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_blob->entry_point(); }
294 static address throw_delayed_StackOverflowError_entry() { return _throw_delayed_StackOverflowError_blob->entry_point(); }
295
296 #if INCLUDE_JFR
297 static address jfr_write_checkpoint() { return _jfr_write_checkpoint_blob->entry_point(); }
298 static address jfr_return_lease() { return _jfr_return_lease_blob->entry_point(); }
299 #endif
300
301 // Counters
302 #ifndef PRODUCT
303 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
304 #endif // PRODUCT
305
306 // Helper routine for full-speed JVMTI exception throwing support
307 static void throw_and_post_jvmti_exception(JavaThread* current, Handle h_exception);
308 static void throw_and_post_jvmti_exception(JavaThread* current, Symbol* name, const char *message = nullptr);
309
310 #if INCLUDE_JVMTI
311 // Functions for JVMTI notifications
312 static void notify_jvmti_vthread_start(oopDesc* vt, jboolean hide, JavaThread* current);
313 static void notify_jvmti_vthread_end(oopDesc* vt, jboolean hide, JavaThread* current);
314 static void notify_jvmti_vthread_mount(oopDesc* vt, jboolean hide, JavaThread* current);
315 static void notify_jvmti_vthread_unmount(oopDesc* vt, jboolean hide, JavaThread* current);
316 #endif
317
318 // RedefineClasses() tracing support for obsolete method entry
319 static int rc_trace_method_entry(JavaThread* thread, Method* m);
320
321 // To be used as the entry point for unresolved native methods.
322 static address native_method_throw_unsatisfied_link_error_entry();
323
324 static void register_finalizer(JavaThread* thread, oopDesc* obj);
325
326 // dtrace notifications
327 static int dtrace_object_alloc(oopDesc* o);
328 static int dtrace_object_alloc(JavaThread* thread, oopDesc* o);
329 static int dtrace_object_alloc(JavaThread* thread, oopDesc* o, size_t size);
330 static int dtrace_method_entry(JavaThread* thread, Method* m);
331 static int dtrace_method_exit(JavaThread* thread, Method* m);
332
333 // Utility method for retrieving the Java thread id, returns 0 if the
334 // thread is not a well formed Java thread.
335 static jlong get_java_tid(JavaThread* thread);
336
337
338 // used by native wrappers to re-enable yellow if overflow happened in native code
339 static void reguard_yellow_pages();
340
341 // Fill in the "X cannot be cast to a Y" message for ClassCastException
342 //
343 // @param thr the current thread
344 // @param caster_klass the class of the object we are casting
345 // @return the dynamically allocated exception message (must be freed
346 // by the caller using a resource mark)
347 //
348 // BCP must refer to the current 'checkcast' opcode for the frame
349 // on top of the stack.
350 // The caller (or one of its callers) must use a ResourceMark
351 // in order to correctly free the result.
352 //
353 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
354
355 // Fill in the "X cannot be cast to a Y" message for ClassCastException
356 //
357 // @param caster_klass the class of the object we are casting
358 // @param target_klass the target klass attempt
359 // @return the dynamically allocated exception message (must be freed
360 // by the caller using a resource mark)
361 //
362 // This version does not require access the frame, so it can be called
363 // from interpreted code
364 // The caller (or one of it's callers) must use a ResourceMark
365 // in order to correctly free the result.
366 //
367 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr);
368
369 // Resolves a call site- may patch in the destination of the call into the
370 // compiled code.
371 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, TRAPS);
372
373 private:
374 // deopt blob
375 static void generate_deopt_blob(void);
376
377 static bool handle_ic_miss_helper_internal(Handle receiver, nmethod* caller_nm, const frame& caller_frame,
378 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
379 bool& needs_ic_stub_refill, TRAPS);
380
381 public:
382 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
383
384 // Resets a call-site in compiled code so it will get resolved again.
385 static methodHandle reresolve_call_site(TRAPS);
386
387 // In the code prolog, if the klass comparison fails, the inline cache
388 // misses and the call site is patched to megamorphic
389 static methodHandle handle_ic_miss_helper(TRAPS);
390
391 // Find the method that called us.
392 static methodHandle find_callee_method(TRAPS);
393
394 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
395
396 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
397
398 // Issue UL warning for unlocked JNI monitor on virtual thread termination
399 static void log_jni_monitor_still_held();
400
401 private:
402 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
403 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
404
405 static Method* extract_attached_method(vframeStream& vfst);
406
407 #if defined(X86) && defined(COMPILER1)
408 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
409 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
410 #endif // X86 && COMPILER1
411
412 public:
413
414 // Read the array of BasicTypes from a Java signature, and compute where
415 // compiled Java code would like to put the results. Values in reg_lo and
416 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
417 // registers, those above refer to 4-byte stack slots. All stack slots are
418 // based off of the window top. SharedInfo::stack0 refers to the first usable
419 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
420 // 4-bytes higher.
421 // return value is the maximum number of VMReg stack slots the convention will use.
422 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
423
424 static void check_member_name_argument_is_last_argument(const methodHandle& method,
425 const BasicType* sig_bt,
426 const VMRegPair* regs) NOT_DEBUG_RETURN;
427
428 // Ditto except for calling C
429 //
430 // C argument in register AND stack slot.
431 // Some architectures require that an argument must be passed in a register
432 // AND in a stack slot. These architectures provide a second VMRegPair array
433 // to be filled by the c_calling_convention method. On other architectures,
434 // null is being passed as the second VMRegPair array, so arguments are either
435 // passed in a register OR in a stack slot.
436 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
437
438 static int vector_calling_convention(VMRegPair *regs,
439 uint num_bits,
440 uint total_args_passed);
441
442 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
443 // blobs. Unlike adapters in the tiger and earlier releases the code in these
444 // blobs does not create a new frame and are therefore virtually invisible
445 // to the stack walking code. In general these blobs extend the callers stack
446 // as needed for the conversion of argument locations.
447
448 // When calling a c2i blob the code will always call the interpreter even if
449 // by the time we reach the blob there is compiled code available. This allows
450 // the blob to pass the incoming stack pointer (the sender sp) in a known
451 // location for the interpreter to record. This is used by the frame code
452 // to correct the sender code to match up with the stack pointer when the
453 // thread left the compiled code. In addition it allows the interpreter
454 // to remove the space the c2i adapter allocated to do its argument conversion.
455
456 // Although a c2i blob will always run interpreted even if compiled code is
457 // present if we see that compiled code is present the compiled call site
458 // will be patched/re-resolved so that later calls will run compiled.
459
460 // Additionally a c2i blob need to have a unverified entry because it can be reached
461 // in situations where the call site is an inlined cache site and may go megamorphic.
462
463 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
464 // that the interpreter before it does any call dispatch will record the current
465 // stack pointer in the interpreter frame. On return it will restore the stack
466 // pointer as needed. This means the i2c adapter code doesn't need any special
467 // handshaking path with compiled code to keep the stack walking correct.
468
469 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
470 int total_args_passed,
471 int max_arg,
472 const BasicType *sig_bt,
473 const VMRegPair *regs,
474 AdapterFingerPrint* fingerprint);
475
476 static void gen_i2c_adapter(MacroAssembler *_masm,
477 int total_args_passed,
478 int comp_args_on_stack,
479 const BasicType *sig_bt,
480 const VMRegPair *regs);
481
482 // OSR support
483
484 // OSR_migration_begin will extract the jvm state from an interpreter
485 // frame (locals, monitors) and store the data in a piece of C heap
486 // storage. This then allows the interpreter frame to be removed from the
487 // stack and the OSR nmethod to be called. That method is called with a
488 // pointer to the C heap storage. This pointer is the return value from
489 // OSR_migration_begin.
490
491 static intptr_t* OSR_migration_begin(JavaThread *thread);
492
493 // OSR_migration_end is a trivial routine. It is called after the compiled
494 // method has extracted the jvm state from the C heap that OSR_migration_begin
495 // created. It's entire job is to simply free this storage.
496 static void OSR_migration_end(intptr_t* buf);
497
498 // Convert a sig into a calling convention register layout
499 // and find interesting things about it.
500 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
501 static VMReg name_for_receiver();
502
503 // "Top of Stack" slots that may be unused by the calling convention but must
504 // otherwise be preserved.
505 // On Intel these are not necessary and the value can be zero.
506 // On Sparc this describes the words reserved for storing a register window
507 // when an interrupt occurs.
508 static uint out_preserve_stack_slots();
509
510 // Stack slots that may be unused by the calling convention but must
511 // otherwise be preserved. On Intel this includes the return address.
512 // On PowerPC it includes the 4 words holding the old TOC & LR glue.
513 static uint in_preserve_stack_slots();
514
515 static VMReg thread_register();
516
517 static void continuation_enter_cleanup(MacroAssembler* masm);
518
519 // Is vector's size (in bytes) bigger than a size saved by default?
520 // For example, on x86 16 bytes XMM registers are saved by default.
521 static bool is_wide_vector(int size);
522
523 // Save and restore a native result
524 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
525 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
526
527 // Generate a native wrapper for a given method. The method takes arguments
528 // in the Java compiled code convention, marshals them to the native
529 // convention (handlizes oops, etc), transitions to native, makes the call,
530 // returns to java state (possibly blocking), unhandlizes any result and
531 // returns.
532 //
533 // The wrapper may contain special-case code if the given method
534 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
535 static nmethod* generate_native_wrapper(MacroAssembler* masm,
536 const methodHandle& method,
537 int compile_id,
538 BasicType* sig_bt,
539 VMRegPair* regs,
540 BasicType ret_type);
541
542 // A compiled caller has just called the interpreter, but compiled code
543 // exists. Patch the caller so he no longer calls into the interpreter.
544 static void fixup_callers_callsite(Method* moop, address ret_pc);
545 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
546
547 // Slow-path Locking and Unlocking
548 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
549 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
550
551 // Resolving of calls
552 static address get_resolved_entry (JavaThread* current, methodHandle callee_method);
553 static address resolve_static_call_C (JavaThread* current);
554 static address resolve_virtual_call_C (JavaThread* current);
555 static address resolve_opt_virtual_call_C(JavaThread* current);
556
557 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
558 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
559 oopDesc* dest, jint dest_pos,
560 jint length, JavaThread* thread);
561
562 // handle ic miss with caller being compiled code
563 // wrong method handling (inline cache misses)
564 static address handle_wrong_method(JavaThread* current);
565 static address handle_wrong_method_abstract(JavaThread* current);
566 static address handle_wrong_method_ic_miss(JavaThread* current);
567
568 static address handle_unsafe_access(JavaThread* thread, address next_pc);
569
570 private:
571 static PerfTickCounters* _perf_resolve_opt_virtual_total_time;
572 static PerfTickCounters* _perf_resolve_virtual_total_time;
573 static PerfTickCounters* _perf_resolve_static_total_time;
574 static PerfTickCounters* _perf_handle_wrong_method_total_time;
575 static PerfTickCounters* _perf_ic_miss_total_time;
576 public:
577 static uint _ic_miss_ctr; // total # of IC misses
578 static uint _wrong_method_ctr;
579 static uint _resolve_static_ctr;
580 static uint _resolve_virtual_ctr;
581 static uint _resolve_opt_virtual_ctr;
582
583 static void print_counters_on(outputStream* st);
584
585 #ifndef PRODUCT
586
587 // Collect and print inline cache miss statistics
588 private:
589 enum { maxICmiss_count = 100 };
590 static int _ICmiss_index; // length of IC miss histogram
591 static int _ICmiss_count[maxICmiss_count]; // miss counts
592 static address _ICmiss_at[maxICmiss_count]; // miss addresses
593 static void trace_ic_miss(address at);
594
595 public:
596 static uint _implicit_null_throws;
597 static uint _implicit_div0_throws;
598
599 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy
600 static uint _jshort_array_copy_ctr; // Slow-path short array copy
601 static uint _jint_array_copy_ctr; // Slow-path int array copy
602 static uint _jlong_array_copy_ctr; // Slow-path long array copy
603 static uint _oop_array_copy_ctr; // Slow-path oop array copy
604 static uint _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
605 static uint _unsafe_array_copy_ctr; // Slow-path includes alignment checks
606 static uint _generic_array_copy_ctr; // Slow-path includes type decoding
607 static uint _slow_array_copy_ctr; // Slow-path failed out to a method call
608
609 static uint _unsafe_set_memory_ctr; // Slow-path includes alignment checks
610
611 static uint _new_instance_ctr; // 'new' object requires GC
612 static uint _new_array_ctr; // 'new' array requires GC
613 static uint _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
614 static uint _find_handler_ctr; // find exception handler
615 static uint _rethrow_ctr; // rethrow exception
616 static uint _mon_enter_stub_ctr; // monitor enter stub
617 static uint _mon_exit_stub_ctr; // monitor exit stub
618 static uint _mon_enter_ctr; // monitor enter slow
619 static uint _mon_exit_ctr; // monitor exit slow
620 static uint _partial_subtype_ctr; // SubRoutines::partial_subtype_check
621
622 // Statistics code
623 // stats for "normal" compiled calls (non-interface)
624 static int64_t _nof_normal_calls; // total # of calls
625 static int64_t _nof_inlined_calls; // total # of inlined normal calls
626 static int64_t _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
627 static int64_t _nof_inlined_static_calls; // total # of inlined static calls
628 // stats for compiled interface calls
629 static int64_t _nof_interface_calls; // total # of compiled calls
630 static int64_t _nof_inlined_interface_calls; // total # of inlined interface calls
631
632 public: // for compiler
633 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
634 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
635 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
636 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
637 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
638 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
639
640 static void print_call_statistics_on(outputStream* st);
641 static void print_ic_miss_histogram_on(outputStream* st);
642 #endif // PRODUCT
643
644 static void print_statistics() PRODUCT_RETURN;
645 };
646
647
648 // ---------------------------------------------------------------------------
649 // Implementation of AdapterHandlerLibrary
650 //
651 // This library manages argument marshaling adapters and native wrappers.
652 // There are 2 flavors of adapters: I2C and C2I.
653 //
654 // The I2C flavor takes a stock interpreted call setup, marshals the
655 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
656 // code_begin(). It is broken to call it without an nmethod assigned.
657 // The usual behavior is to lift any register arguments up out of the
658 // stack and possibly re-pack the extra arguments to be contiguous.
659 // I2C adapters will save what the interpreter's stack pointer will be
660 // after arguments are popped, then adjust the interpreter's frame
661 // size to force alignment and possibly to repack the arguments.
662 // After re-packing, it jumps to the compiled code start. There are
663 // no safepoints in this adapter code and a GC cannot happen while
664 // marshaling is in progress.
665 //
666 // The C2I flavor takes a stock compiled call setup plus the target method in
667 // Rmethod, marshals the arguments for an interpreted call and jumps to
668 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
669 // setup. Compiled frames are fixed-size and the args are likely not in the
670 // right place. Hence all the args will likely be copied into the
671 // interpreter's frame, forcing that frame to grow. The compiled frame's
672 // outgoing stack args will be dead after the copy.
673 //
674 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
675 // also perform an official frame push & pop. They have a call to the native
676 // routine in their middles and end in a return (instead of ending in a jump).
677 // The native wrappers are stored in real nmethods instead of the BufferBlobs
678 // used by the adapters. The code generation happens here because it's very
679 // similar to what the adapters have to do.
680
681 class AdapterHandlerEntry : public CHeapObj<mtCode> {
682 friend class AdapterHandlerLibrary;
683
684 private:
685 AdapterFingerPrint* _fingerprint;
686 address _i2c_entry;
687 address _c2i_entry;
688 address _c2i_unverified_entry;
689 address _c2i_no_clinit_check_entry;
690
691 #ifdef ASSERT
692 // Captures code and signature used to generate this adapter when
693 // verifying adapter equivalence.
694 unsigned char* _saved_code;
695 int _saved_code_length;
696 #endif
697
698 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
699 address c2i_unverified_entry,
700 address c2i_no_clinit_check_entry) :
701 _fingerprint(fingerprint),
702 _i2c_entry(i2c_entry),
703 _c2i_entry(c2i_entry),
704 _c2i_unverified_entry(c2i_unverified_entry),
705 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry)
706 #ifdef ASSERT
707 , _saved_code_length(0)
708 #endif
709 { }
710
711 ~AdapterHandlerEntry();
712
713 public:
714 address get_i2c_entry() const { return _i2c_entry; }
715 address get_c2i_entry() const { return _c2i_entry; }
716 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
717 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
718
719 address base_address();
720 void relocate(address new_base);
721
722 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
723
724 #ifdef ASSERT
725 // Used to verify that code generated for shared adapters is equivalent
726 void save_code (unsigned char* code, int length);
727 bool compare_code(AdapterHandlerEntry* other);
728 #endif
729
730 //virtual void print_on(outputStream* st) const; DO NOT USE
731 void print_adapter_on(outputStream* st) const;
732 };
733
734 class AdapterHandlerLibrary: public AllStatic {
735 friend class SharedRuntime;
736 private:
737 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
738 static AdapterHandlerEntry* _abstract_method_handler;
739 static AdapterHandlerEntry* _no_arg_handler;
740 static AdapterHandlerEntry* _int_arg_handler;
741 static AdapterHandlerEntry* _obj_arg_handler;
742 static AdapterHandlerEntry* _obj_int_arg_handler;
743 static AdapterHandlerEntry* _obj_obj_arg_handler;
744
745 static BufferBlob* buffer_blob();
746 static void initialize();
747 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
748 int total_args_passed,
749 BasicType* sig_bt,
750 bool allocate_code_blob);
751 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
752 public:
753
754 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
755 address i2c_entry,
756 address c2i_entry,
757 address c2i_unverified_entry,
758 address c2i_no_clinit_check_entry = nullptr);
759 static void create_native_wrapper(const methodHandle& method);
760 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
761
762 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
763 static void print_handler_on(outputStream* st, const CodeBlob* b);
764 static bool contains(const CodeBlob* b);
765 #ifndef PRODUCT
766 static void print_statistics_on(outputStream* st);
767 #endif // PRODUCT
768
769 };
770
771 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP