1 /*
2 * Copyright (c) 1997, 2019, 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 "interpreter/bytecodeHistogram.hpp"
29 #include "interpreter/bytecodeTracer.hpp"
30 #include "interpreter/linkResolver.hpp"
31 #include "memory/allocation.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "runtime/signature.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 class SigEntry;
42
43 // Runtime is the base class for various runtime interfaces
44 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
45 // shared functionality such as exception forwarding (C++ to
46 // Java exceptions), locking/unlocking mechanisms, statistical
47 // information, etc.
48
49 class SharedRuntime: AllStatic {
50 friend class VMStructs;
51
52 private:
53 static bool resolve_sub_helper_internal(methodHandle callee_method, const frame& caller_frame,
54 CompiledMethod* caller_nm, bool is_virtual, bool is_optimized,
55 Handle receiver, CallInfo& call_info, Bytecodes::Code invoke_code, TRAPS);
56 static methodHandle resolve_sub_helper(JavaThread *thread,
57 bool is_virtual,
58 bool is_optimized, TRAPS);
59
60 // Shared stub locations
61
62 static RuntimeStub* _wrong_method_blob;
63 static RuntimeStub* _wrong_method_abstract_blob;
64 static RuntimeStub* _ic_miss_blob;
65 static RuntimeStub* _resolve_opt_virtual_call_blob;
66 static RuntimeStub* _resolve_virtual_call_blob;
67 static RuntimeStub* _resolve_static_call_blob;
68 static address _resolve_static_call_entry;
69
70 static DeoptimizationBlob* _deopt_blob;
71
72 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
73 static SafepointBlob* _polling_page_safepoint_handler_blob;
74 static SafepointBlob* _polling_page_return_handler_blob;
75
76 #ifdef COMPILER2
77 static UncommonTrapBlob* _uncommon_trap_blob;
78 #endif // COMPILER2
79
80 #ifndef PRODUCT
81 // Counters
82 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
83 #endif // !PRODUCT
84
85 private:
86 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
87 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
88 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
89 static RuntimeStub* generate_return_value_blob(address destination, const char* name);
90 public:
91 static void generate_stubs(void);
92
93 // max bytes for each dtrace string parameter
94 enum { max_dtrace_string_size = 256 };
95
96 // The following arithmetic routines are used on platforms that do
97 // not have machine instructions to implement their functionality.
98 // Do not remove these.
99
100 // long arithmetics
101 static jlong lmul(jlong y, jlong x);
102 static jlong ldiv(jlong y, jlong x);
103 static jlong lrem(jlong y, jlong x);
104
105 // float and double remainder
106 static jfloat frem(jfloat x, jfloat y);
107 static jdouble drem(jdouble x, jdouble y);
108
109
110 #ifdef _WIN64
111 // Workaround for fmod issue in the Windows x64 CRT
112 static double fmod_winx64(double x, double y);
113 #endif
114
115 #ifdef __SOFTFP__
116 static jfloat fadd(jfloat x, jfloat y);
117 static jfloat fsub(jfloat x, jfloat y);
118 static jfloat fmul(jfloat x, jfloat y);
119 static jfloat fdiv(jfloat x, jfloat y);
120
121 static jdouble dadd(jdouble x, jdouble y);
122 static jdouble dsub(jdouble x, jdouble y);
123 static jdouble dmul(jdouble x, jdouble y);
124 static jdouble ddiv(jdouble x, jdouble y);
125 #endif // __SOFTFP__
126
127 // float conversion (needs to set appropriate rounding mode)
128 static jint f2i (jfloat x);
129 static jlong f2l (jfloat x);
130 static jint d2i (jdouble x);
131 static jlong d2l (jdouble x);
132 static jfloat d2f (jdouble x);
133 static jfloat l2f (jlong x);
134 static jdouble l2d (jlong x);
135
136 #ifdef __SOFTFP__
137 static jfloat i2f (jint x);
138 static jdouble i2d (jint x);
139 static jdouble f2d (jfloat x);
140 #endif // __SOFTFP__
141
142 // double trigonometrics and transcendentals
143 static jdouble dsin(jdouble x);
144 static jdouble dcos(jdouble x);
145 static jdouble dtan(jdouble x);
146 static jdouble dlog(jdouble x);
147 static jdouble dlog10(jdouble x);
148 static jdouble dexp(jdouble x);
149 static jdouble dpow(jdouble x, jdouble y);
150
151 #if defined(__SOFTFP__) || defined(E500V2)
152 static double dabs(double f);
153 #endif
154
155 #if defined(__SOFTFP__) || defined(PPC)
156 static double dsqrt(double f);
157 #endif
158
159 // Montgomery multiplication
160 static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints,
161 jint len, jlong inv, jint *m_ints);
162 static void montgomery_square(jint *a_ints, jint *n_ints,
163 jint len, jlong inv, jint *m_ints);
164
165 #ifdef __SOFTFP__
166 // C++ compiler generates soft float instructions as well as passing
167 // float and double in registers.
168 static int fcmpl(float x, float y);
169 static int fcmpg(float x, float y);
170 static int dcmpl(double x, double y);
171 static int dcmpg(double x, double y);
172
173 static int unordered_fcmplt(float x, float y);
174 static int unordered_dcmplt(double x, double y);
175 static int unordered_fcmple(float x, float y);
176 static int unordered_dcmple(double x, double y);
177 static int unordered_fcmpge(float x, float y);
178 static int unordered_dcmpge(double x, double y);
179 static int unordered_fcmpgt(float x, float y);
180 static int unordered_dcmpgt(double x, double y);
181
182 static float fneg(float f);
183 static double dneg(double f);
184 #endif
185
186 // exception handling across interpreter/compiler boundaries
187 static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address);
188 static address exception_handler_for_return_address(JavaThread* thread, address return_address);
189
190 // exception handling and implicit exceptions
191 static address compute_compiled_exc_handler(CompiledMethod* nm, address ret_pc, Handle& exception,
192 bool force_unwind, bool top_frame_only, bool& recursive_exception_occurred);
193 enum ImplicitExceptionKind {
194 IMPLICIT_NULL,
195 IMPLICIT_DIVIDE_BY_ZERO,
196 STACK_OVERFLOW
197 };
198 static void throw_AbstractMethodError(JavaThread* thread);
199 static void throw_IncompatibleClassChangeError(JavaThread* thread);
200 static void throw_ArithmeticException(JavaThread* thread);
201 static void throw_NullPointerException(JavaThread* thread);
202 static void throw_NullPointerException_at_call(JavaThread* thread);
203 static void throw_StackOverflowError(JavaThread* thread);
204 static void throw_delayed_StackOverflowError(JavaThread* thread);
205 static void throw_StackOverflowError_common(JavaThread* thread, bool delayed);
206 static address continuation_for_implicit_exception(JavaThread* thread,
207 address faulting_pc,
208 ImplicitExceptionKind exception_kind);
209 #if INCLUDE_JVMCI
210 static address deoptimize_for_implicit_exception(JavaThread* thread, address pc, CompiledMethod* nm, int deopt_reason);
211 #endif
212
213 // Post-slow-path-allocation, pre-initializing-stores step for
214 // implementing e.g. ReduceInitialCardMarks
215 static void on_slowpath_allocation_exit(JavaThread* thread);
216
217 static void enable_stack_reserved_zone(JavaThread* thread);
218 static frame look_for_reserved_stack_annotated_method(JavaThread* thread, frame fr);
219
220 // Shared stub locations
221 static address get_poll_stub(address pc);
222
223 static address get_ic_miss_stub() {
224 assert(_ic_miss_blob!= NULL, "oops");
225 return _ic_miss_blob->entry_point();
226 }
227
228 static address get_handle_wrong_method_stub() {
229 assert(_wrong_method_blob!= NULL, "oops");
230 return _wrong_method_blob->entry_point();
231 }
232
233 static address get_handle_wrong_method_abstract_stub() {
234 assert(_wrong_method_abstract_blob!= NULL, "oops");
235 return _wrong_method_abstract_blob->entry_point();
236 }
237
238 #ifdef COMPILER2
239 static void generate_uncommon_trap_blob(void);
240 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
241 #endif // COMPILER2
242
243 static address get_resolve_opt_virtual_call_stub() {
244 assert(_resolve_opt_virtual_call_blob != NULL, "oops");
245 return _resolve_opt_virtual_call_blob->entry_point();
246 }
247 static address get_resolve_virtual_call_stub() {
248 assert(_resolve_virtual_call_blob != NULL, "oops");
249 return _resolve_virtual_call_blob->entry_point();
250 }
251 static address get_resolve_static_call_stub() {
252 assert(_resolve_static_call_blob != NULL, "oops");
253 return _resolve_static_call_blob->entry_point();
254 }
255
256 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
257 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
258 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; }
259
260 // Counters
261 #ifndef PRODUCT
262 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
263 #endif // PRODUCT
264
265 // Helper routine for full-speed JVMTI exception throwing support
266 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception);
267 static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL);
268
269 // RedefineClasses() tracing support for obsolete method entry
270 static int rc_trace_method_entry(JavaThread* thread, Method* m);
271
272 // To be used as the entry point for unresolved native methods.
273 static address native_method_throw_unsatisfied_link_error_entry();
274 static address native_method_throw_unsupported_operation_exception_entry();
275
276 static oop retrieve_receiver(Symbol* sig, frame caller);
277
278 static void register_finalizer(JavaThread* thread, oopDesc* obj);
279
280 // dtrace notifications
281 static int dtrace_object_alloc(oopDesc* o, int size);
282 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o, int size);
283 static int dtrace_method_entry(JavaThread* thread, Method* m);
284 static int dtrace_method_exit(JavaThread* thread, Method* m);
285
286 // Utility method for retrieving the Java thread id, returns 0 if the
287 // thread is not a well formed Java thread.
288 static jlong get_java_tid(Thread* thread);
289
290
291 // used by native wrappers to reenable yellow if overflow happened in native code
292 static void reguard_yellow_pages();
293
294 // Fill in the "X cannot be cast to a Y" message for ClassCastException
295 //
296 // @param thr the current thread
297 // @param caster_klass the class of the object we are casting
298 // @return the dynamically allocated exception message (must be freed
299 // by the caller using a resource mark)
300 //
301 // BCP must refer to the current 'checkcast' opcode for the frame
302 // on top of the stack.
303 // The caller (or one of its callers) must use a ResourceMark
304 // in order to correctly free the result.
305 //
306 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
307
308 // Fill in the "X cannot be cast to a Y" message for ClassCastException
309 //
310 // @param caster_klass the class of the object we are casting
311 // @param target_klass the target klass attempt
312 // @return the dynamically allocated exception message (must be freed
313 // by the caller using a resource mark)
314 //
315 // This version does not require access the frame, so it can be called
316 // from interpreted code
317 // The caller (or one of it's callers) must use a ResourceMark
318 // in order to correctly free the result.
319 //
320 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = NULL);
321
322 // Resolves a call site- may patch in the destination of the call into the
323 // compiled code.
324 static methodHandle resolve_helper(JavaThread *thread,
325 bool is_virtual,
326 bool is_optimized, TRAPS);
327
328 private:
329 // deopt blob
330 static void generate_deopt_blob(void);
331
332 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
333 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
334 bool& needs_ic_stub_refill, bool& is_optimized, TRAPS);
335
336 public:
337 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
338
339 // Resets a call-site in compiled code so it will get resolved again.
340 static methodHandle reresolve_call_site(JavaThread *thread, bool& is_optimized, TRAPS);
341
342 // In the code prolog, if the klass comparison fails, the inline cache
343 // misses and the call site is patched to megamorphic
344 static methodHandle handle_ic_miss_helper(JavaThread* thread, bool& is_optimized, TRAPS);
345
346 // Find the method that called us.
347 static methodHandle find_callee_method(JavaThread* thread, TRAPS);
348
349
350 private:
351 static Handle find_callee_info(JavaThread* thread,
352 Bytecodes::Code& bc,
353 CallInfo& callinfo, TRAPS);
354 static Handle find_callee_info_helper(JavaThread* thread,
355 vframeStream& vfst,
356 Bytecodes::Code& bc,
357 CallInfo& callinfo, TRAPS);
358
359 static methodHandle extract_attached_method(vframeStream& vfst);
360
361 static address clean_virtual_call_entry();
362 static address clean_opt_virtual_call_entry();
363 static address clean_static_call_entry();
364
365 #if defined(X86) && defined(COMPILER1)
366 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
367 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
368 #endif // X86 && COMPILER1
369
370 public:
371
372 // Read the array of BasicTypes from a Java signature, and compute where
373 // compiled Java code would like to put the results. Values in reg_lo and
374 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
375 // registers, those above refer to 4-byte stack slots. All stack slots are
376 // based off of the window top. SharedInfo::stack0 refers to the first usable
377 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
378 // 4-bytes higher. So for sparc because the register window save area is at
379 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
380 // will be just above it. (
381 // return value is the maximum number of VMReg stack slots the convention will use.
382 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing);
383 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
384 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
385 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
386 return java_calling_convention(sig_bt, regs, total_args_passed, false);
387 }
388 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
389 static const uint java_return_convention_max_int;
390 static const uint java_return_convention_max_float;
391
392 static void check_member_name_argument_is_last_argument(const methodHandle& method,
393 const BasicType* sig_bt,
394 const VMRegPair* regs) NOT_DEBUG_RETURN;
395
396 // Ditto except for calling C
397 //
398 // C argument in register AND stack slot.
399 // Some architectures require that an argument must be passed in a register
400 // AND in a stack slot. These architectures provide a second VMRegPair array
401 // to be filled by the c_calling_convention method. On other architectures,
402 // NULL is being passed as the second VMRegPair array, so arguments are either
403 // passed in a register OR in a stack slot.
404 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
405 int total_args_passed);
406
407 static size_t trampoline_size();
408
409 static void generate_trampoline(MacroAssembler *masm, address destination);
410
411 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
412 // blobs. Unlike adapters in the tiger and earlier releases the code in these
413 // blobs does not create a new frame and are therefore virtually invisible
414 // to the stack walking code. In general these blobs extend the callers stack
415 // as needed for the conversion of argument locations.
416
417 // When calling a c2i blob the code will always call the interpreter even if
418 // by the time we reach the blob there is compiled code available. This allows
419 // the blob to pass the incoming stack pointer (the sender sp) in a known
420 // location for the interpreter to record. This is used by the frame code
421 // to correct the sender code to match up with the stack pointer when the
422 // thread left the compiled code. In addition it allows the interpreter
423 // to remove the space the c2i adapter allocated to do its argument conversion.
424
425 // Although a c2i blob will always run interpreted even if compiled code is
426 // present if we see that compiled code is present the compiled call site
427 // will be patched/re-resolved so that later calls will run compiled.
428
429 // Additionally a c2i blob need to have a unverified entry because it can be reached
430 // in situations where the call site is an inlined cache site and may go megamorphic.
431
432 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
433 // that the interpreter before it does any call dispatch will record the current
434 // stack pointer in the interpreter frame. On return it will restore the stack
435 // pointer as needed. This means the i2c adapter code doesn't need any special
436 // handshaking path with compiled code to keep the stack walking correct.
437
438 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm,
439 int comp_args_on_stack,
440 int comp_args_on_stack_cc,
441 const GrowableArray<SigEntry>* sig,
442 const VMRegPair* regs,
443 const GrowableArray<SigEntry>* sig_cc,
444 const VMRegPair* regs_cc,
445 const GrowableArray<SigEntry>* sig_cc_ro,
446 const VMRegPair* regs_cc_ro,
447 AdapterFingerPrint* fingerprint,
448 AdapterBlob*& new_adapter);
449
450 static void gen_i2c_adapter(MacroAssembler *_masm,
451 int comp_args_on_stack,
452 const GrowableArray<SigEntry>* sig,
453 const VMRegPair *regs);
454
455 // OSR support
456
457 // OSR_migration_begin will extract the jvm state from an interpreter
458 // frame (locals, monitors) and store the data in a piece of C heap
459 // storage. This then allows the interpreter frame to be removed from the
460 // stack and the OSR nmethod to be called. That method is called with a
461 // pointer to the C heap storage. This pointer is the return value from
462 // OSR_migration_begin.
463
464 static intptr_t* OSR_migration_begin(JavaThread *thread);
465
466 // OSR_migration_end is a trivial routine. It is called after the compiled
467 // method has extracted the jvm state from the C heap that OSR_migration_begin
468 // created. It's entire job is to simply free this storage.
469 static void OSR_migration_end(intptr_t* buf);
470
471 // Convert a sig into a calling convention register layout
472 // and find interesting things about it.
473 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
474 static VMReg name_for_receiver();
475
476 // "Top of Stack" slots that may be unused by the calling convention but must
477 // otherwise be preserved.
478 // On Intel these are not necessary and the value can be zero.
479 // On Sparc this describes the words reserved for storing a register window
480 // when an interrupt occurs.
481 static uint out_preserve_stack_slots();
482
483 // Is vector's size (in bytes) bigger than a size saved by default?
484 // For example, on x86 16 bytes XMM registers are saved by default.
485 static bool is_wide_vector(int size);
486
487 // Save and restore a native result
488 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
489 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
490
491 // Generate a native wrapper for a given method. The method takes arguments
492 // in the Java compiled code convention, marshals them to the native
493 // convention (handlizes oops, etc), transitions to native, makes the call,
494 // returns to java state (possibly blocking), unhandlizes any result and
495 // returns.
496 //
497 // The wrapper may contain special-case code if the given method
498 // is a JNI critical method, or a compiled method handle adapter,
499 // such as _invokeBasic, _linkToVirtual, etc.
500 static nmethod* generate_native_wrapper(MacroAssembler* masm,
501 const methodHandle& method,
502 int compile_id,
503 BasicType* sig_bt,
504 VMRegPair* regs,
505 BasicType ret_type);
506
507 // Block before entering a JNI critical method
508 static void block_for_jni_critical(JavaThread* thread);
509
510 // Pin/Unpin object
511 static oopDesc* pin_object(JavaThread* thread, oopDesc* obj);
512 static void unpin_object(JavaThread* thread, oopDesc* obj);
513
514 // A compiled caller has just called the interpreter, but compiled code
515 // exists. Patch the caller so he no longer calls into the interpreter.
516 static void fixup_callers_callsite(Method* moop, address ret_pc);
517 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
518
519 // Slow-path Locking and Unlocking
520 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
521 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
522
523 // Resolving of calls
524 static address resolve_static_call_C (JavaThread *thread);
525 static address resolve_virtual_call_C (JavaThread *thread);
526 static address resolve_opt_virtual_call_C(JavaThread *thread);
527
528 static void load_value_type_fields_in_regs(JavaThread *thread, oopDesc* res);
529 static void store_value_type_fields_to_buf(JavaThread *thread, intptr_t res);
530
531 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
532 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
533 oopDesc* dest, jint dest_pos,
534 jint length, JavaThread* thread);
535
536 // handle ic miss with caller being compiled code
537 // wrong method handling (inline cache misses, zombie methods)
538 static address handle_wrong_method(JavaThread* thread);
539 static address handle_wrong_method_abstract(JavaThread* thread);
540 static address handle_wrong_method_ic_miss(JavaThread* thread);
541 static void allocate_value_types(JavaThread* thread, Method* callee, bool allocate_receiver);
542 static void apply_post_barriers(JavaThread* thread, objArrayOopDesc* array);
543
544 static address handle_unsafe_access(JavaThread* thread, address next_pc);
545
546 static BufferedValueTypeBlob* generate_buffered_value_type_adapter(const ValueKlass* vk);
547 #ifndef PRODUCT
548
549 // Collect and print inline cache miss statistics
550 private:
551 enum { maxICmiss_count = 100 };
552 static int _ICmiss_index; // length of IC miss histogram
553 static int _ICmiss_count[maxICmiss_count]; // miss counts
554 static address _ICmiss_at[maxICmiss_count]; // miss addresses
555 static void trace_ic_miss(address at);
556
557 public:
558 static int _throw_null_ctr; // throwing a null-pointer exception
559 static int _ic_miss_ctr; // total # of IC misses
560 static int _wrong_method_ctr;
561 static int _resolve_static_ctr;
562 static int _resolve_virtual_ctr;
563 static int _resolve_opt_virtual_ctr;
564 static int _implicit_null_throws;
565 static int _implicit_div0_throws;
566
567 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
568 static int _jshort_array_copy_ctr; // Slow-path short array copy
569 static int _jint_array_copy_ctr; // Slow-path int array copy
570 static int _jlong_array_copy_ctr; // Slow-path long array copy
571 static int _oop_array_copy_ctr; // Slow-path oop array copy
572 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
573 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
574 static int _generic_array_copy_ctr; // Slow-path includes type decoding
575 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
576
577 static int _new_instance_ctr; // 'new' object requires GC
578 static int _new_array_ctr; // 'new' array requires GC
579 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
580 static int _find_handler_ctr; // find exception handler
581 static int _rethrow_ctr; // rethrow exception
582 static int _mon_enter_stub_ctr; // monitor enter stub
583 static int _mon_exit_stub_ctr; // monitor exit stub
584 static int _mon_enter_ctr; // monitor enter slow
585 static int _mon_exit_ctr; // monitor exit slow
586 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
587
588 // Statistics code
589 // stats for "normal" compiled calls (non-interface)
590 static int _nof_normal_calls; // total # of calls
591 static int _nof_optimized_calls; // total # of statically-bound calls
592 static int _nof_inlined_calls; // total # of inlined normal calls
593 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
594 static int _nof_inlined_static_calls; // total # of inlined static calls
595 // stats for compiled interface calls
596 static int _nof_interface_calls; // total # of compiled calls
597 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls
598 static int _nof_inlined_interface_calls; // total # of inlined interface calls
599 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
600 // stats for runtime exceptions
601 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining
602
603 public: // for compiler
604 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
605 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
606 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
607 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
608 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
609 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
610 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
611 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
612 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
613 static void print_call_statistics(int comp_total);
614 static void print_statistics();
615 static void print_ic_miss_histogram();
616
617 #endif // PRODUCT
618 };
619
620
621 // ---------------------------------------------------------------------------
622 // Implementation of AdapterHandlerLibrary
623 //
624 // This library manages argument marshaling adapters and native wrappers.
625 // There are 2 flavors of adapters: I2C and C2I.
626 //
627 // The I2C flavor takes a stock interpreted call setup, marshals the
628 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
629 // code_begin(). It is broken to call it without an nmethod assigned.
630 // The usual behavior is to lift any register arguments up out of the
631 // stack and possibly re-pack the extra arguments to be contiguous.
632 // I2C adapters will save what the interpreter's stack pointer will be
633 // after arguments are popped, then adjust the interpreter's frame
634 // size to force alignment and possibly to repack the arguments.
635 // After re-packing, it jumps to the compiled code start. There are
636 // no safepoints in this adapter code and a GC cannot happen while
637 // marshaling is in progress.
638 //
639 // The C2I flavor takes a stock compiled call setup plus the target method in
640 // Rmethod, marshals the arguments for an interpreted call and jumps to
641 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
642 // setup. Compiled frames are fixed-size and the args are likely not in the
643 // right place. Hence all the args will likely be copied into the
644 // interpreter's frame, forcing that frame to grow. The compiled frame's
645 // outgoing stack args will be dead after the copy.
646 //
647 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
648 // also perform an official frame push & pop. They have a call to the native
649 // routine in their middles and end in a return (instead of ending in a jump).
650 // The native wrappers are stored in real nmethods instead of the BufferBlobs
651 // used by the adapters. The code generation happens here because it's very
652 // similar to what the adapters have to do.
653
654 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
655 friend class AdapterHandlerTable;
656
657 private:
658 AdapterFingerPrint* _fingerprint;
659 address _i2c_entry;
660 address _c2i_entry;
661 address _c2i_value_entry;
662 address _c2i_value_ro_entry;
663 address _c2i_unverified_entry;
664
665 // Support for scalarized value type calling convention
666 const GrowableArray<SigEntry>* _sig_cc;
667
668 #ifdef ASSERT
669 // Captures code and signature used to generate this adapter when
670 // verifying adapter equivalence.
671 unsigned char* _saved_code;
672 int _saved_code_length;
673 #endif
674
675 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_value_entry, address c2i_value_ro_entry, address c2i_unverified_entry) {
676 _fingerprint = fingerprint;
677 _i2c_entry = i2c_entry;
678 _c2i_entry = c2i_entry;
679 _c2i_value_entry = c2i_value_entry;
680 _c2i_value_ro_entry = c2i_value_ro_entry;
681 _c2i_unverified_entry = c2i_unverified_entry;
682 _sig_cc = NULL;
683 #ifdef ASSERT
684 _saved_code = NULL;
685 _saved_code_length = 0;
686 #endif
687 }
688
689 void deallocate();
690
691 // should never be used
692 AdapterHandlerEntry();
693
694 public:
695 address get_i2c_entry() const { return _i2c_entry; }
696 address get_c2i_entry() const { return _c2i_entry; }
697 address get_c2i_value_entry() const { return _c2i_value_entry; }
698 address get_c2i_value_ro_entry() const { return _c2i_value_ro_entry; }
699 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
700 address base_address();
701 void relocate(address new_base);
702
703 // Support for scalarized value type calling convention
704 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; }
705 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; }
706
707 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
708
709 AdapterHandlerEntry* next() {
710 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
711 }
712
713 #ifdef ASSERT
714 // Used to verify that code generated for shared adapters is equivalent
715 void save_code (unsigned char* code, int length);
716 bool compare_code(unsigned char* code, int length);
717 #endif
718
719 //virtual void print_on(outputStream* st) const; DO NOT USE
720 void print_adapter_on(outputStream* st) const;
721 };
722
723 // This class is used only with DumpSharedSpaces==true. It holds extra information
724 // that's used only during CDS dump time.
725 // For details, see comments around Method::link_method()
726 class CDSAdapterHandlerEntry: public AdapterHandlerEntry {
727 address _c2i_entry_trampoline; // allocated from shared spaces "MC" region
728 AdapterHandlerEntry** _adapter_trampoline; // allocated from shared spaces "MD" region
729
730 public:
731 address get_c2i_entry_trampoline() const { return _c2i_entry_trampoline; }
732 AdapterHandlerEntry** get_adapter_trampoline() const { return _adapter_trampoline; }
733 void init() NOT_CDS_RETURN;
734 };
735
736
737 class AdapterHandlerLibrary: public AllStatic {
738 private:
739 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
740 static AdapterHandlerTable* _adapters;
741 static AdapterHandlerEntry* _abstract_method_handler;
742 static BufferBlob* buffer_blob();
743 static void initialize();
744 static AdapterHandlerEntry* get_adapter0(const methodHandle& method);
745
746 public:
747
748 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
749 address i2c_entry, address c2i_entry, address c2i_value_entry, address c2i_value_ro_entry, address c2i_unverified_entry);
750 static void create_native_wrapper(const methodHandle& method);
751 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
752
753 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
754 static void print_handler_on(outputStream* st, const CodeBlob* b);
755 static bool contains(const CodeBlob* b);
756 #ifndef PRODUCT
757 static void print_statistics();
758 #endif // PRODUCT
759
760 };
761
762 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP