1 /*
2 * Copyright (c) 1997, 2021, 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/allocation.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "runtime/signature.hpp"
36 #include "utilities/hashtable.hpp"
37 #include "utilities/macros.hpp"
38
39 class AdapterHandlerEntry;
40 class AdapterHandlerTable;
41 class AdapterFingerPrint;
42 class vframeStream;
43 class SigEntry;
44
45 // Runtime is the base class for various runtime interfaces
46 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
47 // shared functionality such as exception forwarding (C++ to
48 // Java exceptions), locking/unlocking mechanisms, statistical
49 // information, etc.
50
51 class SharedRuntime: AllStatic {
52 friend class VMStructs;
53
54 private:
55 static bool resolve_sub_helper_internal(methodHandle callee_method, const frame& caller_frame,
56 CompiledMethod* caller_nm, bool is_virtual, bool is_optimized,
57 Handle receiver, CallInfo& call_info, Bytecodes::Code invoke_code, TRAPS);
58 static methodHandle resolve_sub_helper(bool is_virtual, bool is_optimized, bool* caller_is_c1, 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
69 static DeoptimizationBlob* _deopt_blob;
70
71 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
72 static SafepointBlob* _polling_page_safepoint_handler_blob;
73 static SafepointBlob* _polling_page_return_handler_blob;
74
75 #ifdef COMPILER2
76 static UncommonTrapBlob* _uncommon_trap_blob;
77 #endif // COMPILER2
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 // Counters
256 #ifndef PRODUCT
257 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
258 #endif // PRODUCT
259
260 // Helper routine for full-speed JVMTI exception throwing support
261 static void throw_and_post_jvmti_exception(JavaThread* current, Handle h_exception);
262 static void throw_and_post_jvmti_exception(JavaThread* current, Symbol* name, const char *message = NULL);
263
264 // RedefineClasses() tracing support for obsolete method entry
265 static int rc_trace_method_entry(JavaThread* thread, Method* m);
266
267 // To be used as the entry point for unresolved native methods.
268 static address native_method_throw_unsatisfied_link_error_entry();
269
270 static oop retrieve_receiver(Symbol* sig, frame caller);
271
272 static void register_finalizer(JavaThread* thread, oopDesc* obj);
273
274 // dtrace notifications
275 static int dtrace_object_alloc(oopDesc* o, int size);
276 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o, int 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 reenable 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, bool* caller_is_c1, 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, bool& is_optimized, bool caller_is_c1, 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(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, 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(bool& is_optimized, bool& caller_is_c1, 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 static address entry_for_handle_wrong_method(methodHandle callee_method, bool is_static_call, bool is_optimized, bool caller_is_c1) {
346 assert(callee_method->verified_code_entry() != NULL, "Jump to zero!");
347 assert(callee_method->verified_inline_code_entry() != NULL, "Jump to zero!");
348 assert(callee_method->verified_inline_ro_code_entry() != NULL, "Jump to zero!");
349 if (caller_is_c1) {
350 return callee_method->verified_inline_code_entry();
351 } else if (is_static_call || is_optimized) {
352 return callee_method->verified_code_entry();
353 } else {
354 return callee_method->verified_inline_ro_code_entry();
355 }
356 }
357
358 private:
359 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
360 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
361
362 static Method* extract_attached_method(vframeStream& vfst);
363
364 #if defined(X86) && defined(COMPILER1)
365 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
366 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
367 #endif // X86 && COMPILER1
368
369 public:
370
371 // Read the array of BasicTypes from a Java signature, and compute where
372 // compiled Java code would like to put the results. Values in reg_lo and
373 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
374 // registers, those above refer to 4-byte stack slots. All stack slots are
375 // based off of the window top. SharedInfo::stack0 refers to the first usable
376 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
377 // 4-bytes higher.
378 // return value is the maximum number of VMReg stack slots the convention will use.
379 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
380 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
381 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
382 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
383 return java_calling_convention(sig_bt, regs, total_args_passed);
384 }
385 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
386 static const uint java_return_convention_max_int;
387 static const uint java_return_convention_max_float;
388
389 static void check_member_name_argument_is_last_argument(const methodHandle& method,
390 const BasicType* sig_bt,
391 const VMRegPair* regs) NOT_DEBUG_RETURN;
392
393 // Ditto except for calling C
394 //
395 // C argument in register AND stack slot.
396 // Some architectures require that an argument must be passed in a register
397 // AND in a stack slot. These architectures provide a second VMRegPair array
398 // to be filled by the c_calling_convention method. On other architectures,
399 // NULL is being passed as the second VMRegPair array, so arguments are either
400 // passed in a register OR in a stack slot.
401 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
402 int total_args_passed);
403
404 static int vector_calling_convention(VMRegPair *regs,
405 uint num_bits,
406 uint total_args_passed);
407
408 static size_t trampoline_size();
409
410 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
411 // blobs. Unlike adapters in the tiger and earlier releases the code in these
412 // blobs does not create a new frame and are therefore virtually invisible
413 // to the stack walking code. In general these blobs extend the callers stack
414 // as needed for the conversion of argument locations.
415
416 // When calling a c2i blob the code will always call the interpreter even if
417 // by the time we reach the blob there is compiled code available. This allows
418 // the blob to pass the incoming stack pointer (the sender sp) in a known
419 // location for the interpreter to record. This is used by the frame code
420 // to correct the sender code to match up with the stack pointer when the
421 // thread left the compiled code. In addition it allows the interpreter
422 // to remove the space the c2i adapter allocated to do its argument conversion.
423
424 // Although a c2i blob will always run interpreted even if compiled code is
425 // present if we see that compiled code is present the compiled call site
426 // will be patched/re-resolved so that later calls will run compiled.
427
428 // Additionally a c2i blob need to have a unverified entry because it can be reached
429 // in situations where the call site is an inlined cache site and may go megamorphic.
430
431 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
432 // that the interpreter before it does any call dispatch will record the current
433 // stack pointer in the interpreter frame. On return it will restore the stack
434 // pointer as needed. This means the i2c adapter code doesn't need any special
435 // handshaking path with compiled code to keep the stack walking correct.
436
437 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm,
438 int comp_args_on_stack,
439 const GrowableArray<SigEntry>* sig,
440 const VMRegPair* regs,
441 const GrowableArray<SigEntry>* sig_cc,
442 const VMRegPair* regs_cc,
443 const GrowableArray<SigEntry>* sig_cc_ro,
444 const VMRegPair* regs_cc_ro,
445 AdapterFingerPrint* fingerprint,
446 AdapterBlob*& new_adapter,
447 bool allocate_code_blob);
448
449 static void gen_i2c_adapter(MacroAssembler *_masm,
450 int comp_args_on_stack,
451 const GrowableArray<SigEntry>* sig,
452 const VMRegPair *regs);
453
454 // OSR support
455
456 // OSR_migration_begin will extract the jvm state from an interpreter
457 // frame (locals, monitors) and store the data in a piece of C heap
458 // storage. This then allows the interpreter frame to be removed from the
459 // stack and the OSR nmethod to be called. That method is called with a
460 // pointer to the C heap storage. This pointer is the return value from
461 // OSR_migration_begin.
462
463 static intptr_t* OSR_migration_begin(JavaThread *thread);
464
465 // OSR_migration_end is a trivial routine. It is called after the compiled
466 // method has extracted the jvm state from the C heap that OSR_migration_begin
467 // created. It's entire job is to simply free this storage.
468 static void OSR_migration_end(intptr_t* buf);
469
470 // Convert a sig into a calling convention register layout
471 // and find interesting things about it.
472 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
473 static VMReg name_for_receiver();
474
475 // "Top of Stack" slots that may be unused by the calling convention but must
476 // otherwise be preserved.
477 // On Intel these are not necessary and the value can be zero.
478 // On Sparc this describes the words reserved for storing a register window
479 // when an interrupt occurs.
480 static uint out_preserve_stack_slots();
481
482 // Stack slots that may be unused by the calling convention but must
483 // otherwise be preserved. On Intel this includes the return address.
484 // On PowerPC it includes the 4 words holding the old TOC & LR glue.
485 static uint in_preserve_stack_slots();
486
487 // Is vector's size (in bytes) bigger than a size saved by default?
488 // For example, on x86 16 bytes XMM registers are saved by default.
489 static bool is_wide_vector(int size);
490
491 // Save and restore a native result
492 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
493 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
494
495 // Generate a native wrapper for a given method. The method takes arguments
496 // in the Java compiled code convention, marshals them to the native
497 // convention (handlizes oops, etc), transitions to native, makes the call,
498 // returns to java state (possibly blocking), unhandlizes any result and
499 // returns.
500 //
501 // The wrapper may contain special-case code if the given method
502 // is a JNI critical method, or a compiled method handle adapter,
503 // such as _invokeBasic, _linkToVirtual, etc.
504 static nmethod* generate_native_wrapper(MacroAssembler* masm,
505 const methodHandle& method,
506 int compile_id,
507 BasicType* sig_bt,
508 VMRegPair* regs,
509 BasicType ret_type,
510 address critical_entry);
511
512 // A compiled caller has just called the interpreter, but compiled code
513 // exists. Patch the caller so he no longer calls into the interpreter.
514 static void fixup_callers_callsite(Method* moop, address ret_pc);
515 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
516
517 // Slow-path Locking and Unlocking
518 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
519 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
520
521 // Resolving of calls
522 static address resolve_static_call_C (JavaThread* current);
523 static address resolve_virtual_call_C (JavaThread* current);
524 static address resolve_opt_virtual_call_C(JavaThread* current);
525
526 static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res);
527 static void store_inline_type_fields_to_buf(JavaThread* current, intptr_t res);
528
529 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
530 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
531 oopDesc* dest, jint dest_pos,
532 jint length, JavaThread* thread);
533
534 // handle ic miss with caller being compiled code
535 // wrong method handling (inline cache misses, zombie methods)
536 static address handle_wrong_method(JavaThread* current);
537 static address handle_wrong_method_abstract(JavaThread* current);
538 static address handle_wrong_method_ic_miss(JavaThread* current);
539 static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver);
540 static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS);
541
542 static address handle_unsafe_access(JavaThread* thread, address next_pc);
543
544 static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* vk);
545 #ifdef COMPILER2
546 static RuntimeStub* make_native_invoker(address call_target,
547 int shadow_space_bytes,
548 const GrowableArray<VMReg>& input_registers,
549 const GrowableArray<VMReg>& output_registers);
550 #endif
551
552 static void compute_move_order(const BasicType* in_sig_bt,
553 int total_in_args, const VMRegPair* in_regs,
554 int total_out_args, VMRegPair* out_regs,
555 GrowableArray<int>& arg_order,
556 VMRegPair tmp_vmreg);
557
558 #ifndef PRODUCT
559
560 // Collect and print inline cache miss statistics
561 private:
562 enum { maxICmiss_count = 100 };
563 static int _ICmiss_index; // length of IC miss histogram
564 static int _ICmiss_count[maxICmiss_count]; // miss counts
565 static address _ICmiss_at[maxICmiss_count]; // miss addresses
566 static void trace_ic_miss(address at);
567
568 public:
569 static int _ic_miss_ctr; // total # of IC misses
570 static int _wrong_method_ctr;
571 static int _resolve_static_ctr;
572 static int _resolve_virtual_ctr;
573 static int _resolve_opt_virtual_ctr;
574 static int _implicit_null_throws;
575 static int _implicit_div0_throws;
576
577 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
578 static int _jshort_array_copy_ctr; // Slow-path short array copy
579 static int _jint_array_copy_ctr; // Slow-path int array copy
580 static int _jlong_array_copy_ctr; // Slow-path long array copy
581 static int _oop_array_copy_ctr; // Slow-path oop array copy
582 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
583 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
584 static int _generic_array_copy_ctr; // Slow-path includes type decoding
585 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
586
587 static int _new_instance_ctr; // 'new' object requires GC
588 static int _new_array_ctr; // 'new' array requires GC
589 static int _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
590 static int _find_handler_ctr; // find exception handler
591 static int _rethrow_ctr; // rethrow exception
592 static int _mon_enter_stub_ctr; // monitor enter stub
593 static int _mon_exit_stub_ctr; // monitor exit stub
594 static int _mon_enter_ctr; // monitor enter slow
595 static int _mon_exit_ctr; // monitor exit slow
596 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
597
598 // Statistics code
599 // stats for "normal" compiled calls (non-interface)
600 static int64_t _nof_normal_calls; // total # of calls
601 static int64_t _nof_optimized_calls; // total # of statically-bound calls
602 static int64_t _nof_inlined_calls; // total # of inlined normal calls
603 static int64_t _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
604 static int64_t _nof_inlined_static_calls; // total # of inlined static calls
605 // stats for compiled interface calls
606 static int64_t _nof_interface_calls; // total # of compiled calls
607 static int64_t _nof_optimized_interface_calls; // total # of statically-bound interface calls
608 static int64_t _nof_inlined_interface_calls; // total # of inlined interface calls
609 static int64_t _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
610
611 public: // for compiler
612 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
613 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
614 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
615 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
616 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
617 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
618 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
619 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
620 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
621 static void print_call_statistics(uint64_t comp_total);
622 static void print_statistics();
623 static void print_ic_miss_histogram();
624
625 #endif // PRODUCT
626 };
627
628
629 // ---------------------------------------------------------------------------
630 // Implementation of AdapterHandlerLibrary
631 //
632 // This library manages argument marshaling adapters and native wrappers.
633 // There are 2 flavors of adapters: I2C and C2I.
634 //
635 // The I2C flavor takes a stock interpreted call setup, marshals the
636 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
637 // code_begin(). It is broken to call it without an nmethod assigned.
638 // The usual behavior is to lift any register arguments up out of the
639 // stack and possibly re-pack the extra arguments to be contiguous.
640 // I2C adapters will save what the interpreter's stack pointer will be
641 // after arguments are popped, then adjust the interpreter's frame
642 // size to force alignment and possibly to repack the arguments.
643 // After re-packing, it jumps to the compiled code start. There are
644 // no safepoints in this adapter code and a GC cannot happen while
645 // marshaling is in progress.
646 //
647 // The C2I flavor takes a stock compiled call setup plus the target method in
648 // Rmethod, marshals the arguments for an interpreted call and jumps to
649 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
650 // setup. Compiled frames are fixed-size and the args are likely not in the
651 // right place. Hence all the args will likely be copied into the
652 // interpreter's frame, forcing that frame to grow. The compiled frame's
653 // outgoing stack args will be dead after the copy.
654 //
655 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
656 // also perform an official frame push & pop. They have a call to the native
657 // routine in their middles and end in a return (instead of ending in a jump).
658 // The native wrappers are stored in real nmethods instead of the BufferBlobs
659 // used by the adapters. The code generation happens here because it's very
660 // similar to what the adapters have to do.
661
662 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
663 friend class AdapterHandlerTable;
664 friend class AdapterHandlerLibrary;
665
666 private:
667 AdapterFingerPrint* _fingerprint;
668 address _i2c_entry;
669 address _c2i_entry;
670 address _c2i_inline_entry;
671 address _c2i_inline_ro_entry;
672 address _c2i_unverified_entry;
673 address _c2i_unverified_inline_entry;
674 address _c2i_no_clinit_check_entry;
675
676 // Support for scalarized inline type calling convention
677 const GrowableArray<SigEntry>* _sig_cc;
678
679 #ifdef ASSERT
680 // Captures code and signature used to generate this adapter when
681 // verifying adapter equivalence.
682 unsigned char* _saved_code;
683 int _saved_code_length;
684 #endif
685
686 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_inline_entry,
687 address c2i_inline_ro_entry, address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry) {
688 _fingerprint = fingerprint;
689 _i2c_entry = i2c_entry;
690 _c2i_entry = c2i_entry;
691 _c2i_inline_entry = c2i_inline_entry;
692 _c2i_inline_ro_entry = c2i_inline_ro_entry;
693 _c2i_unverified_entry = c2i_unverified_entry;
694 _c2i_unverified_inline_entry = c2i_unverified_inline_entry;
695 _c2i_no_clinit_check_entry = c2i_no_clinit_check_entry;
696 _sig_cc = NULL;
697 #ifdef ASSERT
698 _saved_code_length = 0;
699 #endif
700 }
701
702 void deallocate();
703
704 // should never be used
705 AdapterHandlerEntry();
706
707 public:
708 address get_i2c_entry() const { return _i2c_entry; }
709 address get_c2i_entry() const { return _c2i_entry; }
710 address get_c2i_inline_entry() const { return _c2i_inline_entry; }
711 address get_c2i_inline_ro_entry() const { return _c2i_inline_ro_entry; }
712 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
713 address get_c2i_unverified_inline_entry() const { return _c2i_unverified_inline_entry; }
714 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
715
716 address base_address();
717 void relocate(address new_base);
718
719 // Support for scalarized inline type calling convention
720 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; }
721 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; }
722
723 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
724
725 AdapterHandlerEntry* next() {
726 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
727 }
728
729 #ifdef ASSERT
730 // Used to verify that code generated for shared adapters is equivalent
731 void save_code (unsigned char* code, int length);
732 bool compare_code(AdapterHandlerEntry* other);
733 #endif
734
735 //virtual void print_on(outputStream* st) const; DO NOT USE
736 void print_adapter_on(outputStream* st) const;
737 };
738
739 class CompiledEntrySignature;
740
741 class AdapterHandlerLibrary: public AllStatic {
742 friend class SharedRuntime;
743 private:
744 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
745 static AdapterHandlerTable* _adapters;
746 static AdapterHandlerEntry* _abstract_method_handler;
747 static AdapterHandlerEntry* _no_arg_handler;
748 static AdapterHandlerEntry* _int_arg_handler;
749 static AdapterHandlerEntry* _obj_arg_handler;
750 static AdapterHandlerEntry* _obj_int_arg_handler;
751 static AdapterHandlerEntry* _obj_obj_arg_handler;
752
753 static BufferBlob* buffer_blob();
754 static void initialize();
755 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
756 CompiledEntrySignature& ces,
757 bool allocate_code_blob);
758 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
759 public:
760
761 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
762 address i2c_entry, address c2i_entry, address c2i_inline_entry, address c2i_inline_ro_entry,
763 address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry = NULL);
764 static void create_native_wrapper(const methodHandle& method);
765 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
766
767 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
768 static void print_handler_on(outputStream* st, const CodeBlob* b);
769 static bool contains(const CodeBlob* b);
770 #ifndef PRODUCT
771 static void print_statistics();
772 #endif // PRODUCT
773
774 };
775
776 // Utility class for computing the calling convention of the 3 types
777 // of compiled method entries:
778 // Method::_from_compiled_entry - sig_cc
779 // Method::_from_compiled_inline_ro_entry - sig_cc_ro
780 // Method::_from_compiled_inline_entry - sig
781 class CompiledEntrySignature : public StackObj {
782 Method* _method;
783 int _num_inline_args;
784 bool _has_inline_recv;
785 GrowableArray<SigEntry> *_sig;
786 GrowableArray<SigEntry> *_sig_cc;
787 GrowableArray<SigEntry> *_sig_cc_ro;
788 VMRegPair* _regs;
789 VMRegPair* _regs_cc;
790 VMRegPair* _regs_cc_ro;
791
792 int _args_on_stack;
793 int _args_on_stack_cc;
794 int _args_on_stack_cc_ro;
795
796 bool _c1_needs_stack_repair;
797 bool _c2_needs_stack_repair;
798
799 public:
800 Method* method() const { return _method; }
801
802 // Used by Method::_from_compiled_inline_entry
803 GrowableArray<SigEntry>& sig() const { return *_sig; }
804
805 // Used by Method::_from_compiled_entry
806 GrowableArray<SigEntry>& sig_cc() const { return *_sig_cc; }
807
808 // Used by Method::_from_compiled_inline_ro_entry
809 GrowableArray<SigEntry>& sig_cc_ro() const { return *_sig_cc_ro; }
810
811 VMRegPair* regs() const { return _regs; }
812 VMRegPair* regs_cc() const { return _regs_cc; }
813 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; }
814
815 int args_on_stack() const { return _args_on_stack; }
816 int args_on_stack_cc() const { return _args_on_stack_cc; }
817 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; }
818
819 int num_inline_args() const { return _num_inline_args; }
820 bool has_inline_arg() const { return _num_inline_args > 0; }
821 bool has_inline_recv() const { return _has_inline_recv; }
822
823 bool has_scalarized_args() const { return _sig != _sig_cc; }
824 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; }
825 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; }
826 CodeOffsets::Entries c1_inline_ro_entry_type() const;
827
828 CompiledEntrySignature(Method* method = NULL);
829 void compute_calling_conventions();
830
831 private:
832 int compute_scalarized_cc(GrowableArray<SigEntry>*& sig_cc, VMRegPair*& regs_cc, bool scalar_receiver);
833 };
834
835 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP