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 "asm/codeBuffer.hpp"
29 #include "code/codeBlob.hpp"
30 #include "code/vmreg.hpp"
31 #include "interpreter/bytecodeTracer.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "memory/allStatic.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "runtime/signature.hpp"
36 #include "utilities/macros.hpp"
37
38 class AdapterHandlerEntry;
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(bool is_virtual, bool is_optimized, bool* caller_is_c1, TRAPS);
57
58 // Shared stub locations
59
60 static RuntimeStub* _wrong_method_blob;
61 static RuntimeStub* _wrong_method_abstract_blob;
62 static RuntimeStub* _ic_miss_blob;
63 static RuntimeStub* _resolve_opt_virtual_call_blob;
64 static RuntimeStub* _resolve_virtual_call_blob;
65 static RuntimeStub* _resolve_static_call_blob;
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 static nmethod* _cont_doYield_stub;
78
79 #ifndef PRODUCT
80 // Counters
81 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
82 #endif // !PRODUCT
83
84 private:
85 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
86 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
87 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
88 public:
89 static void generate_stubs(void);
90
91 // max bytes for each dtrace string parameter
92 enum { max_dtrace_string_size = 256 };
93
94 // The following arithmetic routines are used on platforms that do
95 // not have machine instructions to implement their functionality.
96 // Do not remove these.
97
98 // long arithmetics
99 static jlong lmul(jlong y, jlong x);
100 static jlong ldiv(jlong y, jlong x);
101 static jlong lrem(jlong y, jlong x);
102
103 // float and double remainder
104 static jfloat frem(jfloat x, jfloat y);
105 static jdouble drem(jdouble x, jdouble y);
106
107
108 #ifdef _WIN64
109 // Workaround for fmod issue in the Windows x64 CRT
110 static double fmod_winx64(double x, double y);
111 #endif
112
113 #ifdef __SOFTFP__
114 static jfloat fadd(jfloat x, jfloat y);
115 static jfloat fsub(jfloat x, jfloat y);
116 static jfloat fmul(jfloat x, jfloat y);
117 static jfloat fdiv(jfloat x, jfloat y);
118
119 static jdouble dadd(jdouble x, jdouble y);
120 static jdouble dsub(jdouble x, jdouble y);
121 static jdouble dmul(jdouble x, jdouble y);
122 static jdouble ddiv(jdouble x, jdouble y);
123 #endif // __SOFTFP__
124
125 // float conversion (needs to set appropriate rounding mode)
126 static jint f2i (jfloat x);
127 static jlong f2l (jfloat x);
128 static jint d2i (jdouble x);
129 static jlong d2l (jdouble x);
130 static jfloat d2f (jdouble x);
131 static jfloat l2f (jlong x);
132 static jdouble l2d (jlong x);
133
134 #ifdef __SOFTFP__
135 static jfloat i2f (jint x);
136 static jdouble i2d (jint x);
137 static jdouble f2d (jfloat x);
138 #endif // __SOFTFP__
139
140 // double trigonometrics and transcendentals
141 static jdouble dsin(jdouble x);
142 static jdouble dcos(jdouble x);
143 static jdouble dtan(jdouble x);
144 static jdouble dlog(jdouble x);
145 static jdouble dlog10(jdouble x);
146 static jdouble dexp(jdouble x);
147 static jdouble dpow(jdouble x, jdouble y);
148
149 #if defined(__SOFTFP__) || defined(E500V2)
150 static double dabs(double f);
151 #endif
152
153 #if defined(__SOFTFP__) || defined(PPC)
154 static double dsqrt(double f);
155 #endif
156
157 // Montgomery multiplication
158 static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints,
159 jint len, jlong inv, jint *m_ints);
160 static void montgomery_square(jint *a_ints, jint *n_ints,
161 jint len, jlong inv, jint *m_ints);
162
163 #ifdef __SOFTFP__
164 // C++ compiler generates soft float instructions as well as passing
165 // float and double in registers.
166 static int fcmpl(float x, float y);
167 static int fcmpg(float x, float y);
168 static int dcmpl(double x, double y);
169 static int dcmpg(double x, double y);
170
171 static int unordered_fcmplt(float x, float y);
172 static int unordered_dcmplt(double x, double y);
173 static int unordered_fcmple(float x, float y);
174 static int unordered_dcmple(double x, double y);
175 static int unordered_fcmpge(float x, float y);
176 static int unordered_dcmpge(double x, double y);
177 static int unordered_fcmpgt(float x, float y);
178 static int unordered_dcmpgt(double x, double y);
179
180 static float fneg(float f);
181 static double dneg(double f);
182 #endif
183
184 // exception handling across interpreter/compiler boundaries
185 static address raw_exception_handler_for_return_address(JavaThread* current, address return_address);
186 static address exception_handler_for_return_address(JavaThread* current, address return_address);
187
188 // exception handling and implicit exceptions
189 static address compute_compiled_exc_handler(CompiledMethod* nm, address ret_pc, Handle& exception,
190 bool force_unwind, bool top_frame_only, bool& recursive_exception_occurred);
191 enum ImplicitExceptionKind {
192 IMPLICIT_NULL,
193 IMPLICIT_DIVIDE_BY_ZERO,
194 STACK_OVERFLOW
195 };
196 static void throw_AbstractMethodError(JavaThread* current);
197 static void throw_IncompatibleClassChangeError(JavaThread* current);
198 static void throw_ArithmeticException(JavaThread* current);
199 static void throw_NullPointerException(JavaThread* current);
200 static void throw_NullPointerException_at_call(JavaThread* current);
201 static void throw_StackOverflowError(JavaThread* current);
202 static void throw_delayed_StackOverflowError(JavaThread* current);
203 static void throw_StackOverflowError_common(JavaThread* current, bool delayed);
204 static address continuation_for_implicit_exception(JavaThread* current,
205 address faulting_pc,
206 ImplicitExceptionKind exception_kind);
207
208 // Post-slow-path-allocation, pre-initializing-stores step for
209 // implementing e.g. ReduceInitialCardMarks
210 static void on_slowpath_allocation_exit(JavaThread* current);
211
212 static void enable_stack_reserved_zone(JavaThread* current);
213 static frame look_for_reserved_stack_annotated_method(JavaThread* current, frame fr);
214
215 // Shared stub locations
216 static address get_poll_stub(address pc);
217
218 static address get_ic_miss_stub() {
219 assert(_ic_miss_blob!= NULL, "oops");
220 return _ic_miss_blob->entry_point();
221 }
222
223 static address get_handle_wrong_method_stub() {
224 assert(_wrong_method_blob!= NULL, "oops");
225 return _wrong_method_blob->entry_point();
226 }
227
228 static address get_handle_wrong_method_abstract_stub() {
229 assert(_wrong_method_abstract_blob!= NULL, "oops");
230 return _wrong_method_abstract_blob->entry_point();
231 }
232
233 #ifdef COMPILER2
234 static void generate_uncommon_trap_blob(void);
235 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
236 #endif // COMPILER2
237
238 static address get_resolve_opt_virtual_call_stub() {
239 assert(_resolve_opt_virtual_call_blob != NULL, "oops");
240 return _resolve_opt_virtual_call_blob->entry_point();
241 }
242 static address get_resolve_virtual_call_stub() {
243 assert(_resolve_virtual_call_blob != NULL, "oops");
244 return _resolve_virtual_call_blob->entry_point();
245 }
246 static address get_resolve_static_call_stub() {
247 assert(_resolve_static_call_blob != NULL, "oops");
248 return _resolve_static_call_blob->entry_point();
249 }
250
251 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
252 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
253 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; }
254
255 static nmethod* cont_doYield_stub() {
256 assert(_cont_doYield_stub != nullptr, "oops");
257 return _cont_doYield_stub;
258 }
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* current, Handle h_exception);
267 static void throw_and_post_jvmti_exception(JavaThread* current, 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
275 static oop retrieve_receiver(Symbol* sig, frame caller);
276
277 static void register_finalizer(JavaThread* thread, oopDesc* obj);
278
279 // dtrace notifications
280 static int dtrace_object_alloc(oopDesc* o);
281 static int dtrace_object_alloc(Thread* thread, oopDesc* o);
282 static int dtrace_object_alloc(Thread* thread, oopDesc* o, size_t size);
283 static int dtrace_method_entry(JavaThread* thread, Method* m);
284 static int dtrace_method_exit(JavaThread* thread, Method* m);
285
286 // Utility method for retrieving the Java thread id, returns 0 if the
287 // thread is not a well formed Java thread.
288 static jlong get_java_tid(Thread* thread);
289
290
291 // used by native wrappers to re-enable yellow if overflow happened in native code
292 static void reguard_yellow_pages();
293
294 // Fill in the "X cannot be cast to a Y" message for ClassCastException
295 //
296 // @param thr the current thread
297 // @param caster_klass the class of the object we are casting
298 // @return the dynamically allocated exception message (must be freed
299 // by the caller using a resource mark)
300 //
301 // BCP must refer to the current 'checkcast' opcode for the frame
302 // on top of the stack.
303 // The caller (or one of its callers) must use a ResourceMark
304 // in order to correctly free the result.
305 //
306 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
307
308 // Fill in the "X cannot be cast to a Y" message for ClassCastException
309 //
310 // @param caster_klass the class of the object we are casting
311 // @param target_klass the target klass attempt
312 // @return the dynamically allocated exception message (must be freed
313 // by the caller using a resource mark)
314 //
315 // This version does not require access the frame, so it can be called
316 // from interpreted code
317 // The caller (or one of it's callers) must use a ResourceMark
318 // in order to correctly free the result.
319 //
320 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = 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(bool is_virtual, bool is_optimized, bool* caller_is_c1, TRAPS);
325
326 private:
327 // deopt blob
328 static void generate_deopt_blob(void);
329
330 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
331 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
332 bool& needs_ic_stub_refill, bool& is_optimized, bool caller_is_c1, TRAPS);
333
334 public:
335 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
336
337 // Resets a call-site in compiled code so it will get resolved again.
338 static methodHandle reresolve_call_site(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, TRAPS);
339
340 // In the code prolog, if the klass comparison fails, the inline cache
341 // misses and the call site is patched to megamorphic
342 static methodHandle handle_ic_miss_helper(bool& is_optimized, bool& caller_is_c1, TRAPS);
343
344 // Find the method that called us.
345 static methodHandle find_callee_method(TRAPS);
346
347 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
348
349 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
350
351 static address entry_for_handle_wrong_method(methodHandle callee_method, bool is_static_call, bool is_optimized, bool caller_is_c1) {
352 assert(callee_method->verified_code_entry() != NULL, "Jump to zero!");
353 assert(callee_method->verified_inline_code_entry() != NULL, "Jump to zero!");
354 assert(callee_method->verified_inline_ro_code_entry() != NULL, "Jump to zero!");
355 if (caller_is_c1) {
356 return callee_method->verified_inline_code_entry();
357 } else if (is_static_call || is_optimized) {
358 return callee_method->verified_code_entry();
359 } else {
360 return callee_method->verified_inline_ro_code_entry();
361 }
362 }
363
364 private:
365 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
366 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
367
368 static Method* extract_attached_method(vframeStream& vfst);
369
370 #if defined(X86) && defined(COMPILER1)
371 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
372 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
373 #endif // X86 && COMPILER1
374
375 public:
376
377 // Read the array of BasicTypes from a Java signature, and compute where
378 // compiled Java code would like to put the results. Values in reg_lo and
379 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
380 // registers, those above refer to 4-byte stack slots. All stack slots are
381 // based off of the window top. SharedInfo::stack0 refers to the first usable
382 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
383 // 4-bytes higher.
384 // return value is the maximum number of VMReg stack slots the convention will use.
385 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
386 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
387 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
388 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
389 return java_calling_convention(sig_bt, regs, total_args_passed);
390 }
391 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
392 static const uint java_return_convention_max_int;
393 static const uint java_return_convention_max_float;
394
395 static void check_member_name_argument_is_last_argument(const methodHandle& method,
396 const BasicType* sig_bt,
397 const VMRegPair* regs) NOT_DEBUG_RETURN;
398
399 // Ditto except for calling C
400 //
401 // C argument in register AND stack slot.
402 // Some architectures require that an argument must be passed in a register
403 // AND in a stack slot. These architectures provide a second VMRegPair array
404 // to be filled by the c_calling_convention method. On other architectures,
405 // NULL is being passed as the second VMRegPair array, so arguments are either
406 // passed in a register OR in a stack slot.
407 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
408 int total_args_passed);
409
410 static int vector_calling_convention(VMRegPair *regs,
411 uint num_bits,
412 uint total_args_passed);
413
414 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
415 // blobs. Unlike adapters in the tiger and earlier releases the code in these
416 // blobs does not create a new frame and are therefore virtually invisible
417 // to the stack walking code. In general these blobs extend the callers stack
418 // as needed for the conversion of argument locations.
419
420 // When calling a c2i blob the code will always call the interpreter even if
421 // by the time we reach the blob there is compiled code available. This allows
422 // the blob to pass the incoming stack pointer (the sender sp) in a known
423 // location for the interpreter to record. This is used by the frame code
424 // to correct the sender code to match up with the stack pointer when the
425 // thread left the compiled code. In addition it allows the interpreter
426 // to remove the space the c2i adapter allocated to do its argument conversion.
427
428 // Although a c2i blob will always run interpreted even if compiled code is
429 // present if we see that compiled code is present the compiled call site
430 // will be patched/re-resolved so that later calls will run compiled.
431
432 // Additionally a c2i blob need to have a unverified entry because it can be reached
433 // in situations where the call site is an inlined cache site and may go megamorphic.
434
435 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
436 // that the interpreter before it does any call dispatch will record the current
437 // stack pointer in the interpreter frame. On return it will restore the stack
438 // pointer as needed. This means the i2c adapter code doesn't need any special
439 // handshaking path with compiled code to keep the stack walking correct.
440
441 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm,
442 int comp_args_on_stack,
443 const GrowableArray<SigEntry>* sig,
444 const VMRegPair* regs,
445 const GrowableArray<SigEntry>* sig_cc,
446 const VMRegPair* regs_cc,
447 const GrowableArray<SigEntry>* sig_cc_ro,
448 const VMRegPair* regs_cc_ro,
449 AdapterFingerPrint* fingerprint,
450 AdapterBlob*& new_adapter,
451 bool allocate_code_blob);
452
453 static void gen_i2c_adapter(MacroAssembler *_masm,
454 int comp_args_on_stack,
455 const GrowableArray<SigEntry>* sig,
456 const VMRegPair *regs);
457
458 // OSR support
459
460 // OSR_migration_begin will extract the jvm state from an interpreter
461 // frame (locals, monitors) and store the data in a piece of C heap
462 // storage. This then allows the interpreter frame to be removed from the
463 // stack and the OSR nmethod to be called. That method is called with a
464 // pointer to the C heap storage. This pointer is the return value from
465 // OSR_migration_begin.
466
467 static intptr_t* OSR_migration_begin(JavaThread *thread);
468
469 // OSR_migration_end is a trivial routine. It is called after the compiled
470 // method has extracted the jvm state from the C heap that OSR_migration_begin
471 // created. It's entire job is to simply free this storage.
472 static void OSR_migration_end(intptr_t* buf);
473
474 // Convert a sig into a calling convention register layout
475 // and find interesting things about it.
476 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
477 static VMReg name_for_receiver();
478
479 // "Top of Stack" slots that may be unused by the calling convention but must
480 // otherwise be preserved.
481 // On Intel these are not necessary and the value can be zero.
482 // On Sparc this describes the words reserved for storing a register window
483 // when an interrupt occurs.
484 static uint out_preserve_stack_slots();
485
486 // Stack slots that may be unused by the calling convention but must
487 // otherwise be preserved. On Intel this includes the return address.
488 // On PowerPC it includes the 4 words holding the old TOC & LR glue.
489 static uint in_preserve_stack_slots();
490
491 // Is vector's size (in bytes) bigger than a size saved by default?
492 // For example, on x86 16 bytes XMM registers are saved by default.
493 static bool is_wide_vector(int size);
494
495 // Save and restore a native result
496 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
497 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
498
499 // Generate a native wrapper for a given method. The method takes arguments
500 // in the Java compiled code convention, marshals them to the native
501 // convention (handlizes oops, etc), transitions to native, makes the call,
502 // returns to java state (possibly blocking), unhandlizes any result and
503 // returns.
504 //
505 // The wrapper may contain special-case code if the given method
506 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
507 static nmethod* generate_native_wrapper(MacroAssembler* masm,
508 const methodHandle& method,
509 int compile_id,
510 BasicType* sig_bt,
511 VMRegPair* regs,
512 BasicType ret_type);
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* current);
521 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
522
523 // Resolving of calls
524 static address resolve_static_call_C (JavaThread* current);
525 static address resolve_virtual_call_C (JavaThread* current);
526 static address resolve_opt_virtual_call_C(JavaThread* current);
527
528 static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res);
529 static void store_inline_type_fields_to_buf(JavaThread* current, 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)
538 static address handle_wrong_method(JavaThread* current);
539 static address handle_wrong_method_abstract(JavaThread* current);
540 static address handle_wrong_method_ic_miss(JavaThread* current);
541 static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver);
542 static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS);
543
544 static address handle_unsafe_access(JavaThread* thread, address next_pc);
545
546 static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* 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 _ic_miss_ctr; // total # of IC misses
559 static int _wrong_method_ctr;
560 static int _resolve_static_ctr;
561 static int _resolve_virtual_ctr;
562 static int _resolve_opt_virtual_ctr;
563 static int _implicit_null_throws;
564 static int _implicit_div0_throws;
565
566 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
567 static int _jshort_array_copy_ctr; // Slow-path short array copy
568 static int _jint_array_copy_ctr; // Slow-path int array copy
569 static int _jlong_array_copy_ctr; // Slow-path long array copy
570 static int _oop_array_copy_ctr; // Slow-path oop array copy
571 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
572 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
573 static int _generic_array_copy_ctr; // Slow-path includes type decoding
574 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
575
576 static int _new_instance_ctr; // 'new' object requires GC
577 static int _new_array_ctr; // 'new' array requires GC
578 static int _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
579 static int _find_handler_ctr; // find exception handler
580 static int _rethrow_ctr; // rethrow exception
581 static int _mon_enter_stub_ctr; // monitor enter stub
582 static int _mon_exit_stub_ctr; // monitor exit stub
583 static int _mon_enter_ctr; // monitor enter slow
584 static int _mon_exit_ctr; // monitor exit slow
585 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
586
587 // Statistics code
588 // stats for "normal" compiled calls (non-interface)
589 static int64_t _nof_normal_calls; // total # of calls
590 static int64_t _nof_optimized_calls; // total # of statically-bound calls
591 static int64_t _nof_inlined_calls; // total # of inlined normal calls
592 static int64_t _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
593 static int64_t _nof_inlined_static_calls; // total # of inlined static calls
594 // stats for compiled interface calls
595 static int64_t _nof_interface_calls; // total # of compiled calls
596 static int64_t _nof_optimized_interface_calls; // total # of statically-bound interface calls
597 static int64_t _nof_inlined_interface_calls; // total # of inlined interface calls
598 static int64_t _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
599
600 public: // for compiler
601 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
602 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
603 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
604 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
605 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
606 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
607 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
608 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
609 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
610 static void print_call_statistics(uint64_t comp_total);
611 static void print_statistics();
612 static void print_ic_miss_histogram();
613
614 #endif // PRODUCT
615 };
616
617
618 // ---------------------------------------------------------------------------
619 // Implementation of AdapterHandlerLibrary
620 //
621 // This library manages argument marshaling adapters and native wrappers.
622 // There are 2 flavors of adapters: I2C and C2I.
623 //
624 // The I2C flavor takes a stock interpreted call setup, marshals the
625 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
626 // code_begin(). It is broken to call it without an nmethod assigned.
627 // The usual behavior is to lift any register arguments up out of the
628 // stack and possibly re-pack the extra arguments to be contiguous.
629 // I2C adapters will save what the interpreter's stack pointer will be
630 // after arguments are popped, then adjust the interpreter's frame
631 // size to force alignment and possibly to repack the arguments.
632 // After re-packing, it jumps to the compiled code start. There are
633 // no safepoints in this adapter code and a GC cannot happen while
634 // marshaling is in progress.
635 //
636 // The C2I flavor takes a stock compiled call setup plus the target method in
637 // Rmethod, marshals the arguments for an interpreted call and jumps to
638 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
639 // setup. Compiled frames are fixed-size and the args are likely not in the
640 // right place. Hence all the args will likely be copied into the
641 // interpreter's frame, forcing that frame to grow. The compiled frame's
642 // outgoing stack args will be dead after the copy.
643 //
644 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
645 // also perform an official frame push & pop. They have a call to the native
646 // routine in their middles and end in a return (instead of ending in a jump).
647 // The native wrappers are stored in real nmethods instead of the BufferBlobs
648 // used by the adapters. The code generation happens here because it's very
649 // similar to what the adapters have to do.
650
651 class AdapterHandlerEntry : public CHeapObj<mtCode> {
652 friend class AdapterHandlerLibrary;
653
654 private:
655 AdapterFingerPrint* _fingerprint;
656 address _i2c_entry;
657 address _c2i_entry;
658 address _c2i_inline_entry;
659 address _c2i_inline_ro_entry;
660 address _c2i_unverified_entry;
661 address _c2i_unverified_inline_entry;
662 address _c2i_no_clinit_check_entry;
663
664 // Support for scalarized inline type calling convention
665 const GrowableArray<SigEntry>* _sig_cc;
666
667 #ifdef ASSERT
668 // Captures code and signature used to generate this adapter when
669 // verifying adapter equivalence.
670 unsigned char* _saved_code;
671 int _saved_code_length;
672 #endif
673
674 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
675 address c2i_inline_entry, address c2i_inline_ro_entry,
676 address c2i_unverified_entry, address c2i_unverified_inline_entry,
677 address c2i_no_clinit_check_entry) :
678 _fingerprint(fingerprint),
679 _i2c_entry(i2c_entry),
680 _c2i_entry(c2i_entry),
681 _c2i_inline_entry(c2i_inline_entry),
682 _c2i_inline_ro_entry(c2i_inline_ro_entry),
683 _c2i_unverified_entry(c2i_unverified_entry),
684 _c2i_unverified_inline_entry(c2i_unverified_inline_entry),
685 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry),
686 _sig_cc(NULL)
687 #ifdef ASSERT
688 , _saved_code_length(0)
689 #endif
690 { }
691
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_inline_entry() const { return _c2i_inline_entry; }
698 address get_c2i_inline_ro_entry() const { return _c2i_inline_ro_entry; }
699 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
700 address get_c2i_unverified_inline_entry() const { return _c2i_unverified_inline_entry; }
701 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
702
703 address base_address();
704 void relocate(address new_base);
705
706 // Support for scalarized inline type calling convention
707 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; }
708 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; }
709
710 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
711
712 #ifdef ASSERT
713 // Used to verify that code generated for shared adapters is equivalent
714 void save_code (unsigned char* code, int length);
715 bool compare_code(AdapterHandlerEntry* other);
716 #endif
717
718 //virtual void print_on(outputStream* st) const; DO NOT USE
719 void print_adapter_on(outputStream* st) const;
720 };
721
722 class CompiledEntrySignature;
723
724 class AdapterHandlerLibrary: public AllStatic {
725 friend class SharedRuntime;
726 private:
727 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
728 static AdapterHandlerEntry* _abstract_method_handler;
729 static AdapterHandlerEntry* _no_arg_handler;
730 static AdapterHandlerEntry* _int_arg_handler;
731 static AdapterHandlerEntry* _obj_arg_handler;
732 static AdapterHandlerEntry* _obj_int_arg_handler;
733 static AdapterHandlerEntry* _obj_obj_arg_handler;
734
735 static BufferBlob* buffer_blob();
736 static void initialize();
737 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
738 CompiledEntrySignature& ces,
739 bool allocate_code_blob);
740 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
741 public:
742
743 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
744 address i2c_entry, address c2i_entry, address c2i_inline_entry, address c2i_inline_ro_entry,
745 address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry = NULL);
746 static void create_native_wrapper(const methodHandle& method);
747 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
748
749 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
750 static void print_handler_on(outputStream* st, const CodeBlob* b);
751 static bool contains(const CodeBlob* b);
752 #ifndef PRODUCT
753 static void print_statistics();
754 #endif // PRODUCT
755
756 };
757
758 // Utility class for computing the calling convention of the 3 types
759 // of compiled method entries:
760 // Method::_from_compiled_entry - sig_cc
761 // Method::_from_compiled_inline_ro_entry - sig_cc_ro
762 // Method::_from_compiled_inline_entry - sig
763 class CompiledEntrySignature : public StackObj {
764 Method* _method;
765 int _num_inline_args;
766 bool _has_inline_recv;
767 GrowableArray<SigEntry> *_sig;
768 GrowableArray<SigEntry> *_sig_cc;
769 GrowableArray<SigEntry> *_sig_cc_ro;
770 VMRegPair* _regs;
771 VMRegPair* _regs_cc;
772 VMRegPair* _regs_cc_ro;
773
774 int _args_on_stack;
775 int _args_on_stack_cc;
776 int _args_on_stack_cc_ro;
777
778 bool _c1_needs_stack_repair;
779 bool _c2_needs_stack_repair;
780
781 public:
782 Method* method() const { return _method; }
783
784 // Used by Method::_from_compiled_inline_entry
785 GrowableArray<SigEntry>& sig() const { return *_sig; }
786
787 // Used by Method::_from_compiled_entry
788 GrowableArray<SigEntry>& sig_cc() const { return *_sig_cc; }
789
790 // Used by Method::_from_compiled_inline_ro_entry
791 GrowableArray<SigEntry>& sig_cc_ro() const { return *_sig_cc_ro; }
792
793 VMRegPair* regs() const { return _regs; }
794 VMRegPair* regs_cc() const { return _regs_cc; }
795 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; }
796
797 int args_on_stack() const { return _args_on_stack; }
798 int args_on_stack_cc() const { return _args_on_stack_cc; }
799 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; }
800
801 int num_inline_args() const { return _num_inline_args; }
802 bool has_inline_recv() const { return _has_inline_recv; }
803
804 bool has_scalarized_args() const { return _sig != _sig_cc; }
805 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; }
806 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; }
807 CodeOffsets::Entries c1_inline_ro_entry_type() const;
808
809 CompiledEntrySignature(Method* method = NULL);
810 void compute_calling_conventions(bool init = true);
811 };
812
813 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP