1 /*
2 * Copyright (c) 1997, 2022, 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/bytecodeTracer.hpp"
31 #include "interpreter/linkResolver.hpp"
32 #include "memory/allStatic.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "utilities/hashtable.hpp"
35 #include "utilities/macros.hpp"
36
37 class AdapterHandlerEntry;
38 class AdapterHandlerTable;
39 class AdapterFingerPrint;
40 class vframeStream;
41
42 // Runtime is the base class for various runtime interfaces
43 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
44 // shared functionality such as exception forwarding (C++ to
45 // Java exceptions), locking/unlocking mechanisms, statistical
46 // information, etc.
47
48 class SharedRuntime: AllStatic {
49 friend class VMStructs;
50
51 private:
52 static bool resolve_sub_helper_internal(methodHandle callee_method, const frame& caller_frame,
53 CompiledMethod* caller_nm, bool is_virtual, bool is_optimized,
54 Handle receiver, CallInfo& call_info, Bytecodes::Code invoke_code, TRAPS);
55 static methodHandle resolve_sub_helper(bool is_virtual, bool is_optimized, TRAPS);
56
57 // Shared stub locations
58
59 static RuntimeStub* _wrong_method_blob;
60 static RuntimeStub* _wrong_method_abstract_blob;
61 static RuntimeStub* _ic_miss_blob;
62 static RuntimeStub* _resolve_opt_virtual_call_blob;
63 static RuntimeStub* _resolve_virtual_call_blob;
64 static RuntimeStub* _resolve_static_call_blob;
65 static address _resolve_static_call_entry;
66
67 static DeoptimizationBlob* _deopt_blob;
68
69 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
70 static SafepointBlob* _polling_page_safepoint_handler_blob;
71 static SafepointBlob* _polling_page_return_handler_blob;
72
73 #ifdef COMPILER2
74 static UncommonTrapBlob* _uncommon_trap_blob;
75 #endif // COMPILER2
76
77 #ifndef PRODUCT
78 // Counters
79 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
80 #endif // !PRODUCT
81
82 private:
83 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
84 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
85 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
86
87 public:
88 static void generate_stubs(void);
89
90 // max bytes for each dtrace string parameter
91 enum { max_dtrace_string_size = 256 };
92
93 // The following arithmetic routines are used on platforms that do
94 // not have machine instructions to implement their functionality.
95 // Do not remove these.
96
97 // long arithmetics
98 static jlong lmul(jlong y, jlong x);
99 static jlong ldiv(jlong y, jlong x);
100 static jlong lrem(jlong y, jlong x);
101
102 // float and double remainder
103 static jfloat frem(jfloat x, jfloat y);
104 static jdouble drem(jdouble x, jdouble y);
105
106
107 #ifdef _WIN64
108 // Workaround for fmod issue in the Windows x64 CRT
109 static double fmod_winx64(double x, double y);
110 #endif
111
112 #ifdef __SOFTFP__
113 static jfloat fadd(jfloat x, jfloat y);
114 static jfloat fsub(jfloat x, jfloat y);
115 static jfloat fmul(jfloat x, jfloat y);
116 static jfloat fdiv(jfloat x, jfloat y);
117
118 static jdouble dadd(jdouble x, jdouble y);
119 static jdouble dsub(jdouble x, jdouble y);
120 static jdouble dmul(jdouble x, jdouble y);
121 static jdouble ddiv(jdouble x, jdouble y);
122 #endif // __SOFTFP__
123
124 // float conversion (needs to set appropriate rounding mode)
125 static jint f2i (jfloat x);
126 static jlong f2l (jfloat x);
127 static jint d2i (jdouble x);
128 static jlong d2l (jdouble x);
129 static jfloat d2f (jdouble x);
130 static jfloat l2f (jlong x);
131 static jdouble l2d (jlong x);
132
133 #ifdef __SOFTFP__
134 static jfloat i2f (jint x);
135 static jdouble i2d (jint x);
136 static jdouble f2d (jfloat x);
137 #endif // __SOFTFP__
138
139 // double trigonometrics and transcendentals
140 static jdouble dsin(jdouble x);
141 static jdouble dcos(jdouble x);
142 static jdouble dtan(jdouble x);
143 static jdouble dlog(jdouble x);
144 static jdouble dlog10(jdouble x);
145 static jdouble dexp(jdouble x);
146 static jdouble dpow(jdouble x, jdouble y);
147
148 #if defined(__SOFTFP__) || defined(E500V2)
149 static double dabs(double f);
150 #endif
151
152 #if defined(__SOFTFP__) || defined(PPC)
153 static double dsqrt(double f);
154 #endif
155
156 // Montgomery multiplication
157 static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints,
158 jint len, jlong inv, jint *m_ints);
159 static void montgomery_square(jint *a_ints, jint *n_ints,
160 jint len, jlong inv, jint *m_ints);
161
162 #ifdef __SOFTFP__
163 // C++ compiler generates soft float instructions as well as passing
164 // float and double in registers.
165 static int fcmpl(float x, float y);
166 static int fcmpg(float x, float y);
167 static int dcmpl(double x, double y);
168 static int dcmpg(double x, double y);
169
170 static int unordered_fcmplt(float x, float y);
171 static int unordered_dcmplt(double x, double y);
172 static int unordered_fcmple(float x, float y);
173 static int unordered_dcmple(double x, double y);
174 static int unordered_fcmpge(float x, float y);
175 static int unordered_dcmpge(double x, double y);
176 static int unordered_fcmpgt(float x, float y);
177 static int unordered_dcmpgt(double x, double y);
178
179 static float fneg(float f);
180 static double dneg(double f);
181 #endif
182
183 // exception handling across interpreter/compiler boundaries
184 static address raw_exception_handler_for_return_address(JavaThread* current, address return_address);
185 static address exception_handler_for_return_address(JavaThread* current, address return_address);
186
187 // exception handling and implicit exceptions
188 static address compute_compiled_exc_handler(CompiledMethod* nm, address ret_pc, Handle& exception,
189 bool force_unwind, bool top_frame_only, bool& recursive_exception_occurred);
190 enum ImplicitExceptionKind {
191 IMPLICIT_NULL,
192 IMPLICIT_DIVIDE_BY_ZERO,
193 STACK_OVERFLOW
194 };
195 static void throw_AbstractMethodError(JavaThread* current);
196 static void throw_IncompatibleClassChangeError(JavaThread* current);
197 static void throw_ArithmeticException(JavaThread* current);
198 static void throw_NullPointerException(JavaThread* current);
199 static void throw_NullPointerException_at_call(JavaThread* current);
200 static void throw_StackOverflowError(JavaThread* current);
201 static void throw_delayed_StackOverflowError(JavaThread* current);
202 static void throw_StackOverflowError_common(JavaThread* current, bool delayed);
203 static address continuation_for_implicit_exception(JavaThread* current,
204 address faulting_pc,
205 ImplicitExceptionKind exception_kind);
206
207 // Post-slow-path-allocation, pre-initializing-stores step for
208 // implementing e.g. ReduceInitialCardMarks
209 static void on_slowpath_allocation_exit(JavaThread* current);
210
211 static void enable_stack_reserved_zone(JavaThread* current);
212 static frame look_for_reserved_stack_annotated_method(JavaThread* current, frame fr);
213
214 // Shared stub locations
215 static address get_poll_stub(address pc);
216
217 static address get_ic_miss_stub() {
218 assert(_ic_miss_blob!= NULL, "oops");
219 return _ic_miss_blob->entry_point();
220 }
221
222 static address get_handle_wrong_method_stub() {
223 assert(_wrong_method_blob!= NULL, "oops");
224 return _wrong_method_blob->entry_point();
225 }
226
227 static address get_handle_wrong_method_abstract_stub() {
228 assert(_wrong_method_abstract_blob!= NULL, "oops");
229 return _wrong_method_abstract_blob->entry_point();
230 }
231
232 #ifdef COMPILER2
233 static void generate_uncommon_trap_blob(void);
234 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
235 #endif // COMPILER2
236
237 static address get_resolve_opt_virtual_call_stub() {
238 assert(_resolve_opt_virtual_call_blob != NULL, "oops");
239 return _resolve_opt_virtual_call_blob->entry_point();
240 }
241 static address get_resolve_virtual_call_stub() {
242 assert(_resolve_virtual_call_blob != NULL, "oops");
243 return _resolve_virtual_call_blob->entry_point();
244 }
245 static address get_resolve_static_call_stub() {
246 assert(_resolve_static_call_blob != NULL, "oops");
247 return _resolve_static_call_blob->entry_point();
248 }
249
250 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
251 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
252 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; }
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 = NULL);
262
263 // RedefineClasses() tracing support for obsolete method entry
264 static int rc_trace_method_entry(JavaThread* thread, Method* m);
265
266 // To be used as the entry point for unresolved native methods.
267 static address native_method_throw_unsatisfied_link_error_entry();
268
269 static oop retrieve_receiver(Symbol* sig, frame caller);
270
271 static void register_finalizer(JavaThread* thread, oopDesc* obj);
272
273 // dtrace notifications
274 static int dtrace_object_alloc(oopDesc* o);
275 static int dtrace_object_alloc(Thread* thread, oopDesc* o);
276 static int dtrace_object_alloc(Thread* thread, oopDesc* o, size_t size);
277 static int dtrace_method_entry(JavaThread* thread, Method* m);
278 static int dtrace_method_exit(JavaThread* thread, Method* m);
279
280 // Utility method for retrieving the Java thread id, returns 0 if the
281 // thread is not a well formed Java thread.
282 static jlong get_java_tid(Thread* thread);
283
284
285 // used by native wrappers to re-enable yellow if overflow happened in native code
286 static void reguard_yellow_pages();
287
288 // Fill in the "X cannot be cast to a Y" message for ClassCastException
289 //
290 // @param thr the current thread
291 // @param caster_klass the class of the object we are casting
292 // @return the dynamically allocated exception message (must be freed
293 // by the caller using a resource mark)
294 //
295 // BCP must refer to the current 'checkcast' opcode for the frame
296 // on top of the stack.
297 // The caller (or one of its callers) must use a ResourceMark
298 // in order to correctly free the result.
299 //
300 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
301
302 // Fill in the "X cannot be cast to a Y" message for ClassCastException
303 //
304 // @param caster_klass the class of the object we are casting
305 // @param target_klass the target klass attempt
306 // @return the dynamically allocated exception message (must be freed
307 // by the caller using a resource mark)
308 //
309 // This version does not require access the frame, so it can be called
310 // from interpreted code
311 // The caller (or one of it's callers) must use a ResourceMark
312 // in order to correctly free the result.
313 //
314 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = NULL);
315
316 // Resolves a call site- may patch in the destination of the call into the
317 // compiled code.
318 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, TRAPS);
319
320 private:
321 // deopt blob
322 static void generate_deopt_blob(void);
323
324 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
325 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
326 bool& needs_ic_stub_refill, TRAPS);
327
328 public:
329 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
330
331 // Resets a call-site in compiled code so it will get resolved again.
332 static methodHandle reresolve_call_site(TRAPS);
333
334 // In the code prolog, if the klass comparison fails, the inline cache
335 // misses and the call site is patched to megamorphic
336 static methodHandle handle_ic_miss_helper(TRAPS);
337
338 // Find the method that called us.
339 static methodHandle find_callee_method(TRAPS);
340
341 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
342
343 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
344
345 private:
346 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
347 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
348
349 static Method* extract_attached_method(vframeStream& vfst);
350
351 #if defined(X86) && defined(COMPILER1)
352 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
353 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
354 #endif // X86 && COMPILER1
355
356 public:
357
358 // Read the array of BasicTypes from a Java signature, and compute where
359 // compiled Java code would like to put the results. Values in reg_lo and
360 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
361 // registers, those above refer to 4-byte stack slots. All stack slots are
362 // based off of the window top. SharedInfo::stack0 refers to the first usable
363 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
364 // 4-bytes higher.
365 // return value is the maximum number of VMReg stack slots the convention will use.
366 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
367
368 static void check_member_name_argument_is_last_argument(const methodHandle& method,
369 const BasicType* sig_bt,
370 const VMRegPair* regs) NOT_DEBUG_RETURN;
371
372 // Ditto except for calling C
373 //
374 // C argument in register AND stack slot.
375 // Some architectures require that an argument must be passed in a register
376 // AND in a stack slot. These architectures provide a second VMRegPair array
377 // to be filled by the c_calling_convention method. On other architectures,
378 // NULL is being passed as the second VMRegPair array, so arguments are either
379 // passed in a register OR in a stack slot.
380 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
381 int total_args_passed);
382
383 static int vector_calling_convention(VMRegPair *regs,
384 uint num_bits,
385 uint total_args_passed);
386
387 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
388 // blobs. Unlike adapters in the tiger and earlier releases the code in these
389 // blobs does not create a new frame and are therefore virtually invisible
390 // to the stack walking code. In general these blobs extend the callers stack
391 // as needed for the conversion of argument locations.
392
393 // When calling a c2i blob the code will always call the interpreter even if
394 // by the time we reach the blob there is compiled code available. This allows
395 // the blob to pass the incoming stack pointer (the sender sp) in a known
396 // location for the interpreter to record. This is used by the frame code
397 // to correct the sender code to match up with the stack pointer when the
398 // thread left the compiled code. In addition it allows the interpreter
399 // to remove the space the c2i adapter allocated to do its argument conversion.
400
401 // Although a c2i blob will always run interpreted even if compiled code is
402 // present if we see that compiled code is present the compiled call site
403 // will be patched/re-resolved so that later calls will run compiled.
404
405 // Additionally a c2i blob need to have a unverified entry because it can be reached
406 // in situations where the call site is an inlined cache site and may go megamorphic.
407
408 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
409 // that the interpreter before it does any call dispatch will record the current
410 // stack pointer in the interpreter frame. On return it will restore the stack
411 // pointer as needed. This means the i2c adapter code doesn't need any special
412 // handshaking path with compiled code to keep the stack walking correct.
413
414 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
415 int total_args_passed,
416 int max_arg,
417 const BasicType *sig_bt,
418 const VMRegPair *regs,
419 AdapterFingerPrint* fingerprint);
420
421 static void gen_i2c_adapter(MacroAssembler *_masm,
422 int total_args_passed,
423 int comp_args_on_stack,
424 const BasicType *sig_bt,
425 const VMRegPair *regs);
426
427 // OSR support
428
429 // OSR_migration_begin will extract the jvm state from an interpreter
430 // frame (locals, monitors) and store the data in a piece of C heap
431 // storage. This then allows the interpreter frame to be removed from the
432 // stack and the OSR nmethod to be called. That method is called with a
433 // pointer to the C heap storage. This pointer is the return value from
434 // OSR_migration_begin.
435
436 static intptr_t* OSR_migration_begin(JavaThread *thread);
437
438 // OSR_migration_end is a trivial routine. It is called after the compiled
439 // method has extracted the jvm state from the C heap that OSR_migration_begin
440 // created. It's entire job is to simply free this storage.
441 static void OSR_migration_end(intptr_t* buf);
442
443 // Convert a sig into a calling convention register layout
444 // and find interesting things about it.
445 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
446 static VMReg name_for_receiver();
447
448 // "Top of Stack" slots that may be unused by the calling convention but must
449 // otherwise be preserved.
450 // On Intel these are not necessary and the value can be zero.
451 // On Sparc this describes the words reserved for storing a register window
452 // when an interrupt occurs.
453 static uint out_preserve_stack_slots();
454
455 // Stack slots that may be unused by the calling convention but must
456 // otherwise be preserved. On Intel this includes the return address.
457 // On PowerPC it includes the 4 words holding the old TOC & LR glue.
458 static uint in_preserve_stack_slots();
459
460 // Is vector's size (in bytes) bigger than a size saved by default?
461 // For example, on x86 16 bytes XMM registers are saved by default.
462 static bool is_wide_vector(int size);
463
464 // Save and restore a native result
465 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
466 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
467
468 // Generate a native wrapper for a given method. The method takes arguments
469 // in the Java compiled code convention, marshals them to the native
470 // convention (handlizes oops, etc), transitions to native, makes the call,
471 // returns to java state (possibly blocking), unhandlizes any result and
472 // returns.
473 //
474 // The wrapper may contain special-case code if the given method
475 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
476 static nmethod* generate_native_wrapper(MacroAssembler* masm,
477 const methodHandle& method,
478 int compile_id,
479 BasicType* sig_bt,
480 VMRegPair* regs,
481 BasicType ret_type);
482
483 // A compiled caller has just called the interpreter, but compiled code
484 // exists. Patch the caller so he no longer calls into the interpreter.
485 static void fixup_callers_callsite(Method* moop, address ret_pc);
486 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
487
488 // Slow-path Locking and Unlocking
489 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
490 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
491
492 // Resolving of calls
493 static address resolve_static_call_C (JavaThread* current);
494 static address resolve_virtual_call_C (JavaThread* current);
495 static address resolve_opt_virtual_call_C(JavaThread* current);
496
497 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
498 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
499 oopDesc* dest, jint dest_pos,
500 jint length, JavaThread* thread);
501
502 // handle ic miss with caller being compiled code
503 // wrong method handling (inline cache misses, zombie methods)
504 static address handle_wrong_method(JavaThread* current);
505 static address handle_wrong_method_abstract(JavaThread* current);
506 static address handle_wrong_method_ic_miss(JavaThread* current);
507
508 static address handle_unsafe_access(JavaThread* thread, address next_pc);
509
510 #ifdef COMPILER2
511 static RuntimeStub* make_native_invoker(address call_target,
512 int shadow_space_bytes,
513 const GrowableArray<VMReg>& input_registers,
514 const GrowableArray<VMReg>& output_registers);
515 #endif
516
517 static void compute_move_order(const BasicType* in_sig_bt,
518 int total_in_args, const VMRegPair* in_regs,
519 int total_out_args, VMRegPair* out_regs,
520 GrowableArray<int>& arg_order,
521 VMRegPair tmp_vmreg);
522
523 #ifndef PRODUCT
524
525 // Collect and print inline cache miss statistics
526 private:
527 enum { maxICmiss_count = 100 };
528 static int _ICmiss_index; // length of IC miss histogram
529 static int _ICmiss_count[maxICmiss_count]; // miss counts
530 static address _ICmiss_at[maxICmiss_count]; // miss addresses
531 static void trace_ic_miss(address at);
532
533 public:
534 static int _ic_miss_ctr; // total # of IC misses
535 static int _wrong_method_ctr;
536 static int _resolve_static_ctr;
537 static int _resolve_virtual_ctr;
538 static int _resolve_opt_virtual_ctr;
539 static int _implicit_null_throws;
540 static int _implicit_div0_throws;
541
542 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
543 static int _jshort_array_copy_ctr; // Slow-path short array copy
544 static int _jint_array_copy_ctr; // Slow-path int array copy
545 static int _jlong_array_copy_ctr; // Slow-path long array copy
546 static int _oop_array_copy_ctr; // Slow-path oop array copy
547 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
548 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
549 static int _generic_array_copy_ctr; // Slow-path includes type decoding
550 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
551
552 static int _new_instance_ctr; // 'new' object requires GC
553 static int _new_array_ctr; // 'new' array requires GC
554 static int _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
555 static int _find_handler_ctr; // find exception handler
556 static int _rethrow_ctr; // rethrow exception
557 static int _mon_enter_stub_ctr; // monitor enter stub
558 static int _mon_exit_stub_ctr; // monitor exit stub
559 static int _mon_enter_ctr; // monitor enter slow
560 static int _mon_exit_ctr; // monitor exit slow
561 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
562
563 // Statistics code
564 // stats for "normal" compiled calls (non-interface)
565 static int64_t _nof_normal_calls; // total # of calls
566 static int64_t _nof_optimized_calls; // total # of statically-bound calls
567 static int64_t _nof_inlined_calls; // total # of inlined normal calls
568 static int64_t _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
569 static int64_t _nof_inlined_static_calls; // total # of inlined static calls
570 // stats for compiled interface calls
571 static int64_t _nof_interface_calls; // total # of compiled calls
572 static int64_t _nof_optimized_interface_calls; // total # of statically-bound interface calls
573 static int64_t _nof_inlined_interface_calls; // total # of inlined interface calls
574 static int64_t _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
575
576 public: // for compiler
577 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
578 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
579 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
580 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
581 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
582 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
583 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
584 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
585 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
586 static void print_call_statistics(uint64_t comp_total);
587 static void print_statistics();
588 static void print_ic_miss_histogram();
589
590 #endif // PRODUCT
591 };
592
593
594 // ---------------------------------------------------------------------------
595 // Implementation of AdapterHandlerLibrary
596 //
597 // This library manages argument marshaling adapters and native wrappers.
598 // There are 2 flavors of adapters: I2C and C2I.
599 //
600 // The I2C flavor takes a stock interpreted call setup, marshals the
601 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
602 // code_begin(). It is broken to call it without an nmethod assigned.
603 // The usual behavior is to lift any register arguments up out of the
604 // stack and possibly re-pack the extra arguments to be contiguous.
605 // I2C adapters will save what the interpreter's stack pointer will be
606 // after arguments are popped, then adjust the interpreter's frame
607 // size to force alignment and possibly to repack the arguments.
608 // After re-packing, it jumps to the compiled code start. There are
609 // no safepoints in this adapter code and a GC cannot happen while
610 // marshaling is in progress.
611 //
612 // The C2I flavor takes a stock compiled call setup plus the target method in
613 // Rmethod, marshals the arguments for an interpreted call and jumps to
614 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
615 // setup. Compiled frames are fixed-size and the args are likely not in the
616 // right place. Hence all the args will likely be copied into the
617 // interpreter's frame, forcing that frame to grow. The compiled frame's
618 // outgoing stack args will be dead after the copy.
619 //
620 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
621 // also perform an official frame push & pop. They have a call to the native
622 // routine in their middles and end in a return (instead of ending in a jump).
623 // The native wrappers are stored in real nmethods instead of the BufferBlobs
624 // used by the adapters. The code generation happens here because it's very
625 // similar to what the adapters have to do.
626
627 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
628 friend class AdapterHandlerTable;
629 friend class AdapterHandlerLibrary;
630
631 private:
632 AdapterFingerPrint* _fingerprint;
633 address _i2c_entry;
634 address _c2i_entry;
635 address _c2i_unverified_entry;
636 address _c2i_no_clinit_check_entry;
637
638 #ifdef ASSERT
639 // Captures code and signature used to generate this adapter when
640 // verifying adapter equivalence.
641 unsigned char* _saved_code;
642 int _saved_code_length;
643 #endif
644
645 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry, address c2i_no_clinit_check_entry) {
646 _fingerprint = fingerprint;
647 _i2c_entry = i2c_entry;
648 _c2i_entry = c2i_entry;
649 _c2i_unverified_entry = c2i_unverified_entry;
650 _c2i_no_clinit_check_entry = c2i_no_clinit_check_entry;
651 #ifdef ASSERT
652 _saved_code_length = 0;
653 #endif
654 }
655
656 void deallocate();
657
658 // should never be used
659 AdapterHandlerEntry();
660
661 public:
662 address get_i2c_entry() const { return _i2c_entry; }
663 address get_c2i_entry() const { return _c2i_entry; }
664 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
665 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
666
667 address base_address();
668 void relocate(address new_base);
669
670 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
671
672 AdapterHandlerEntry* next() {
673 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
674 }
675
676 #ifdef ASSERT
677 // Used to verify that code generated for shared adapters is equivalent
678 void save_code (unsigned char* code, int length);
679 bool compare_code(AdapterHandlerEntry* other);
680 #endif
681
682 //virtual void print_on(outputStream* st) const; DO NOT USE
683 void print_adapter_on(outputStream* st) const;
684 };
685
686 class AdapterHandlerLibrary: public AllStatic {
687 friend class SharedRuntime;
688 private:
689 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
690 static AdapterHandlerTable* _adapters;
691 static AdapterHandlerEntry* _abstract_method_handler;
692 static AdapterHandlerEntry* _no_arg_handler;
693 static AdapterHandlerEntry* _int_arg_handler;
694 static AdapterHandlerEntry* _obj_arg_handler;
695 static AdapterHandlerEntry* _obj_int_arg_handler;
696 static AdapterHandlerEntry* _obj_obj_arg_handler;
697
698 static BufferBlob* buffer_blob();
699 static void initialize();
700 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
701 int total_args_passed,
702 BasicType* sig_bt,
703 bool allocate_code_blob);
704 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
705 public:
706
707 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
708 address i2c_entry,
709 address c2i_entry,
710 address c2i_unverified_entry,
711 address c2i_no_clinit_check_entry = NULL);
712 static void create_native_wrapper(const methodHandle& method);
713 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
714
715 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
716 static void print_handler_on(outputStream* st, const CodeBlob* b);
717 static bool contains(const CodeBlob* b);
718 #ifndef PRODUCT
719 static void print_statistics();
720 #endif // PRODUCT
721
722 };
723
724 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP