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/linkResolver.hpp"
32 #include "memory/allStatic.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "runtime/signature.hpp"
35 #include "utilities/macros.hpp"
36
37 class AdapterHandlerEntry;
38 class AdapterFingerPrint;
39 class vframeStream;
40 class SigEntry;
41
42 // Runtime is the base class for various runtime interfaces
43 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
44 // shared functionality such as exception forwarding (C++ to
45 // Java exceptions), locking/unlocking mechanisms, statistical
46 // information, etc.
47
48 class SharedRuntime: AllStatic {
49 friend class VMStructs;
50
51 private:
52 static bool resolve_sub_helper_internal(methodHandle callee_method, const frame& caller_frame,
53 CompiledMethod* caller_nm, bool is_virtual, bool is_optimized,
54 Handle receiver, CallInfo& call_info, Bytecodes::Code invoke_code, TRAPS);
55 static methodHandle resolve_sub_helper(bool is_virtual, bool is_optimized, bool* caller_is_c1, TRAPS);
56
57 // Shared stub locations
58
59 static RuntimeStub* _wrong_method_blob;
60 static RuntimeStub* _wrong_method_abstract_blob;
61 static RuntimeStub* _ic_miss_blob;
62 static RuntimeStub* _resolve_opt_virtual_call_blob;
63 static RuntimeStub* _resolve_virtual_call_blob;
64 static RuntimeStub* _resolve_static_call_blob;
65
66 static DeoptimizationBlob* _deopt_blob;
67
68 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
69 static SafepointBlob* _polling_page_safepoint_handler_blob;
70 static SafepointBlob* _polling_page_return_handler_blob;
71
72 #ifdef COMPILER2
73 static UncommonTrapBlob* _uncommon_trap_blob;
74 #endif // COMPILER2
75
76 static nmethod* _cont_doYield_stub;
77
78 #ifndef PRODUCT
79 // Counters
80 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
81 #endif // !PRODUCT
82
83 private:
84 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
85 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
86 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
87 public:
88 static void generate_stubs(void);
89
90 // max bytes for each dtrace string parameter
91 enum { max_dtrace_string_size = 256 };
92
93 // The following arithmetic routines are used on platforms that do
94 // not have machine instructions to implement their functionality.
95 // Do not remove these.
96
97 // long arithmetics
98 static jlong lmul(jlong y, jlong x);
99 static jlong ldiv(jlong y, jlong x);
100 static jlong lrem(jlong y, jlong x);
101
102 // float and double remainder
103 static jfloat frem(jfloat x, jfloat y);
104 static jdouble drem(jdouble x, jdouble y);
105
106
107 #ifdef _WIN64
108 // Workaround for fmod issue in the Windows x64 CRT
109 static double fmod_winx64(double x, double y);
110 #endif
111
112 #ifdef __SOFTFP__
113 static jfloat fadd(jfloat x, jfloat y);
114 static jfloat fsub(jfloat x, jfloat y);
115 static jfloat fmul(jfloat x, jfloat y);
116 static jfloat fdiv(jfloat x, jfloat y);
117
118 static jdouble dadd(jdouble x, jdouble y);
119 static jdouble dsub(jdouble x, jdouble y);
120 static jdouble dmul(jdouble x, jdouble y);
121 static jdouble ddiv(jdouble x, jdouble y);
122 #endif // __SOFTFP__
123
124 // float conversion (needs to set appropriate rounding mode)
125 static jint f2i (jfloat x);
126 static jlong f2l (jfloat x);
127 static jint d2i (jdouble x);
128 static jlong d2l (jdouble x);
129 static jfloat d2f (jdouble x);
130 static jfloat l2f (jlong x);
131 static jdouble l2d (jlong x);
132 static jfloat hf2f(jshort x);
133 static jshort f2hf(jfloat x);
134 static jfloat i2f (jint x);
135
136 #ifdef __SOFTFP__
137 static jdouble i2d (jint x);
138 static jdouble f2d (jfloat x);
139 #endif // __SOFTFP__
140
141 // double trigonometrics and transcendentals
142 static jdouble dsin(jdouble x);
143 static jdouble dcos(jdouble x);
144 static jdouble dtan(jdouble x);
145 static jdouble dlog(jdouble x);
146 static jdouble dlog10(jdouble x);
147 static jdouble dexp(jdouble x);
148 static jdouble dpow(jdouble x, jdouble y);
149
150 #if defined(__SOFTFP__) || defined(E500V2)
151 static double dabs(double f);
152 #endif
153
154 #if defined(__SOFTFP__) || defined(PPC)
155 static double dsqrt(double f);
156 #endif
157
158 // Montgomery multiplication
159 static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints,
160 jint len, jlong inv, jint *m_ints);
161 static void montgomery_square(jint *a_ints, jint *n_ints,
162 jint len, jlong inv, jint *m_ints);
163
164 #ifdef __SOFTFP__
165 // C++ compiler generates soft float instructions as well as passing
166 // float and double in registers.
167 static int fcmpl(float x, float y);
168 static int fcmpg(float x, float y);
169 static int dcmpl(double x, double y);
170 static int dcmpg(double x, double y);
171
172 static int unordered_fcmplt(float x, float y);
173 static int unordered_dcmplt(double x, double y);
174 static int unordered_fcmple(float x, float y);
175 static int unordered_dcmple(double x, double y);
176 static int unordered_fcmpge(float x, float y);
177 static int unordered_dcmpge(double x, double y);
178 static int unordered_fcmpgt(float x, float y);
179 static int unordered_dcmpgt(double x, double y);
180
181 static float fneg(float f);
182 static double dneg(double f);
183 #endif
184
185 // exception handling across interpreter/compiler boundaries
186 static address raw_exception_handler_for_return_address(JavaThread* current, address return_address);
187 static address exception_handler_for_return_address(JavaThread* current, address return_address);
188
189 // exception handling and implicit exceptions
190 static address compute_compiled_exc_handler(CompiledMethod* nm, address ret_pc, Handle& exception,
191 bool force_unwind, bool top_frame_only, bool& recursive_exception_occurred);
192 enum ImplicitExceptionKind {
193 IMPLICIT_NULL,
194 IMPLICIT_DIVIDE_BY_ZERO,
195 STACK_OVERFLOW
196 };
197 static void throw_AbstractMethodError(JavaThread* current);
198 static void throw_IncompatibleClassChangeError(JavaThread* current);
199 static void throw_ArithmeticException(JavaThread* current);
200 static void throw_NullPointerException(JavaThread* current);
201 static void throw_NullPointerException_at_call(JavaThread* current);
202 static void throw_StackOverflowError(JavaThread* current);
203 static void throw_delayed_StackOverflowError(JavaThread* current);
204 static void throw_StackOverflowError_common(JavaThread* current, bool delayed);
205 static address continuation_for_implicit_exception(JavaThread* current,
206 address faulting_pc,
207 ImplicitExceptionKind exception_kind);
208
209 // Post-slow-path-allocation, pre-initializing-stores step for
210 // implementing e.g. ReduceInitialCardMarks
211 static void on_slowpath_allocation_exit(JavaThread* current);
212
213 static void enable_stack_reserved_zone(JavaThread* current);
214 static frame look_for_reserved_stack_annotated_method(JavaThread* current, frame fr);
215
216 // Shared stub locations
217 static address get_poll_stub(address pc);
218
219 static address get_ic_miss_stub() {
220 assert(_ic_miss_blob!= NULL, "oops");
221 return _ic_miss_blob->entry_point();
222 }
223
224 static address get_handle_wrong_method_stub() {
225 assert(_wrong_method_blob!= NULL, "oops");
226 return _wrong_method_blob->entry_point();
227 }
228
229 static address get_handle_wrong_method_abstract_stub() {
230 assert(_wrong_method_abstract_blob!= NULL, "oops");
231 return _wrong_method_abstract_blob->entry_point();
232 }
233
234 #ifdef COMPILER2
235 static void generate_uncommon_trap_blob(void);
236 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
237 #endif // COMPILER2
238
239 static address get_resolve_opt_virtual_call_stub() {
240 assert(_resolve_opt_virtual_call_blob != NULL, "oops");
241 return _resolve_opt_virtual_call_blob->entry_point();
242 }
243 static address get_resolve_virtual_call_stub() {
244 assert(_resolve_virtual_call_blob != NULL, "oops");
245 return _resolve_virtual_call_blob->entry_point();
246 }
247 static address get_resolve_static_call_stub() {
248 assert(_resolve_static_call_blob != NULL, "oops");
249 return _resolve_static_call_blob->entry_point();
250 }
251
252 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
253 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
254 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; }
255
256 static nmethod* cont_doYield_stub() {
257 assert(_cont_doYield_stub != nullptr, "oops");
258 return _cont_doYield_stub;
259 }
260
261 // Counters
262 #ifndef PRODUCT
263 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
264 #endif // PRODUCT
265
266 // Helper routine for full-speed JVMTI exception throwing support
267 static void throw_and_post_jvmti_exception(JavaThread* current, Handle h_exception);
268 static void throw_and_post_jvmti_exception(JavaThread* current, Symbol* name, const char *message = NULL);
269
270 // RedefineClasses() tracing support for obsolete method entry
271 static int rc_trace_method_entry(JavaThread* thread, Method* m);
272
273 // To be used as the entry point for unresolved native methods.
274 static address native_method_throw_unsatisfied_link_error_entry();
275
276 static void register_finalizer(JavaThread* thread, oopDesc* obj);
277
278 // dtrace notifications
279 static int dtrace_object_alloc(oopDesc* o);
280 static int dtrace_object_alloc(JavaThread* thread, oopDesc* o);
281 static int dtrace_object_alloc(JavaThread* thread, oopDesc* o, size_t size);
282 static int dtrace_method_entry(JavaThread* thread, Method* m);
283 static int dtrace_method_exit(JavaThread* thread, Method* m);
284
285 // Utility method for retrieving the Java thread id, returns 0 if the
286 // thread is not a well formed Java thread.
287 static jlong get_java_tid(JavaThread* thread);
288
289
290 // used by native wrappers to re-enable yellow if overflow happened in native code
291 static void reguard_yellow_pages();
292
293 // Fill in the "X cannot be cast to a Y" message for ClassCastException
294 //
295 // @param thr the current thread
296 // @param caster_klass the class of the object we are casting
297 // @return the dynamically allocated exception message (must be freed
298 // by the caller using a resource mark)
299 //
300 // BCP must refer to the current 'checkcast' opcode for the frame
301 // on top of the stack.
302 // The caller (or one of its callers) must use a ResourceMark
303 // in order to correctly free the result.
304 //
305 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass);
306
307 // Fill in the "X cannot be cast to a Y" message for ClassCastException
308 //
309 // @param caster_klass the class of the object we are casting
310 // @param target_klass the target klass attempt
311 // @return the dynamically allocated exception message (must be freed
312 // by the caller using a resource mark)
313 //
314 // This version does not require access the frame, so it can be called
315 // from interpreted code
316 // The caller (or one of it's callers) must use a ResourceMark
317 // in order to correctly free the result.
318 //
319 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = NULL);
320
321 // Resolves a call site- may patch in the destination of the call into the
322 // compiled code.
323 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, bool* caller_is_c1, TRAPS);
324
325 private:
326 // deopt blob
327 static void generate_deopt_blob(void);
328
329 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
330 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
331 bool& needs_ic_stub_refill, bool& is_optimized, bool caller_is_c1, TRAPS);
332
333 public:
334 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
335
336 // Resets a call-site in compiled code so it will get resolved again.
337 static methodHandle reresolve_call_site(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, TRAPS);
338
339 // In the code prolog, if the klass comparison fails, the inline cache
340 // misses and the call site is patched to megamorphic
341 static methodHandle handle_ic_miss_helper(bool& is_optimized, bool& caller_is_c1, TRAPS);
342
343 // Find the method that called us.
344 static methodHandle find_callee_method(TRAPS);
345
346 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread);
347
348 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current);
349
350 static address entry_for_handle_wrong_method(methodHandle callee_method, bool is_static_call, bool is_optimized, bool caller_is_c1) {
351 assert(callee_method->verified_code_entry() != NULL, "Jump to zero!");
352 assert(callee_method->verified_inline_code_entry() != NULL, "Jump to zero!");
353 assert(callee_method->verified_inline_ro_code_entry() != NULL, "Jump to zero!");
354 if (caller_is_c1) {
355 return callee_method->verified_inline_code_entry();
356 } else if (is_static_call || is_optimized) {
357 return callee_method->verified_code_entry();
358 } else {
359 return callee_method->verified_inline_ro_code_entry();
360 }
361 }
362
363 private:
364 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
365 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS);
366
367 static Method* extract_attached_method(vframeStream& vfst);
368
369 #if defined(X86) && defined(COMPILER1)
370 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
371 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
372 #endif // X86 && COMPILER1
373
374 public:
375
376 // Read the array of BasicTypes from a Java signature, and compute where
377 // compiled Java code would like to put the results. Values in reg_lo and
378 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
379 // registers, those above refer to 4-byte stack slots. All stack slots are
380 // based off of the window top. SharedInfo::stack0 refers to the first usable
381 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
382 // 4-bytes higher.
383 // return value is the maximum number of VMReg stack slots the convention will use.
384 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
385 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
386 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
387 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
388 return java_calling_convention(sig_bt, regs, total_args_passed);
389 }
390 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
391 static const uint java_return_convention_max_int;
392 static const uint java_return_convention_max_float;
393
394 static void check_member_name_argument_is_last_argument(const methodHandle& method,
395 const BasicType* sig_bt,
396 const VMRegPair* regs) NOT_DEBUG_RETURN;
397
398 // Ditto except for calling C
399 //
400 // C argument in register AND stack slot.
401 // Some architectures require that an argument must be passed in a register
402 // AND in a stack slot. These architectures provide a second VMRegPair array
403 // to be filled by the c_calling_convention method. On other architectures,
404 // NULL is being passed as the second VMRegPair array, so arguments are either
405 // passed in a register OR in a stack slot.
406 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
407 int total_args_passed);
408
409 static int vector_calling_convention(VMRegPair *regs,
410 uint num_bits,
411 uint total_args_passed);
412
413 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
414 // blobs. Unlike adapters in the tiger and earlier releases the code in these
415 // blobs does not create a new frame and are therefore virtually invisible
416 // to the stack walking code. In general these blobs extend the callers stack
417 // as needed for the conversion of argument locations.
418
419 // When calling a c2i blob the code will always call the interpreter even if
420 // by the time we reach the blob there is compiled code available. This allows
421 // the blob to pass the incoming stack pointer (the sender sp) in a known
422 // location for the interpreter to record. This is used by the frame code
423 // to correct the sender code to match up with the stack pointer when the
424 // thread left the compiled code. In addition it allows the interpreter
425 // to remove the space the c2i adapter allocated to do its argument conversion.
426
427 // Although a c2i blob will always run interpreted even if compiled code is
428 // present if we see that compiled code is present the compiled call site
429 // will be patched/re-resolved so that later calls will run compiled.
430
431 // Additionally a c2i blob need to have a unverified entry because it can be reached
432 // in situations where the call site is an inlined cache site and may go megamorphic.
433
434 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
435 // that the interpreter before it does any call dispatch will record the current
436 // stack pointer in the interpreter frame. On return it will restore the stack
437 // pointer as needed. This means the i2c adapter code doesn't need any special
438 // handshaking path with compiled code to keep the stack walking correct.
439
440 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm,
441 int comp_args_on_stack,
442 const GrowableArray<SigEntry>* sig,
443 const VMRegPair* regs,
444 const GrowableArray<SigEntry>* sig_cc,
445 const VMRegPair* regs_cc,
446 const GrowableArray<SigEntry>* sig_cc_ro,
447 const VMRegPair* regs_cc_ro,
448 AdapterFingerPrint* fingerprint,
449 AdapterBlob*& new_adapter,
450 bool allocate_code_blob);
451
452 static void gen_i2c_adapter(MacroAssembler *_masm,
453 int comp_args_on_stack,
454 const GrowableArray<SigEntry>* sig,
455 const VMRegPair *regs);
456
457 // OSR support
458
459 // OSR_migration_begin will extract the jvm state from an interpreter
460 // frame (locals, monitors) and store the data in a piece of C heap
461 // storage. This then allows the interpreter frame to be removed from the
462 // stack and the OSR nmethod to be called. That method is called with a
463 // pointer to the C heap storage. This pointer is the return value from
464 // OSR_migration_begin.
465
466 static intptr_t* OSR_migration_begin(JavaThread *thread);
467
468 // OSR_migration_end is a trivial routine. It is called after the compiled
469 // method has extracted the jvm state from the C heap that OSR_migration_begin
470 // created. It's entire job is to simply free this storage.
471 static void OSR_migration_end(intptr_t* buf);
472
473 // Convert a sig into a calling convention register layout
474 // and find interesting things about it.
475 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
476 static VMReg name_for_receiver();
477
478 // "Top of Stack" slots that may be unused by the calling convention but must
479 // otherwise be preserved.
480 // On Intel these are not necessary and the value can be zero.
481 // On Sparc this describes the words reserved for storing a register window
482 // when an interrupt occurs.
483 static uint out_preserve_stack_slots();
484
485 // Stack slots that may be unused by the calling convention but must
486 // otherwise be preserved. On Intel this includes the return address.
487 // On PowerPC it includes the 4 words holding the old TOC & LR glue.
488 static uint in_preserve_stack_slots();
489
490 // Is vector's size (in bytes) bigger than a size saved by default?
491 // For example, on x86 16 bytes XMM registers are saved by default.
492 static bool is_wide_vector(int size);
493
494 // Save and restore a native result
495 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
496 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
497
498 // Generate a native wrapper for a given method. The method takes arguments
499 // in the Java compiled code convention, marshals them to the native
500 // convention (handlizes oops, etc), transitions to native, makes the call,
501 // returns to java state (possibly blocking), unhandlizes any result and
502 // returns.
503 //
504 // The wrapper may contain special-case code if the given method
505 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc.
506 static nmethod* generate_native_wrapper(MacroAssembler* masm,
507 const methodHandle& method,
508 int compile_id,
509 BasicType* sig_bt,
510 VMRegPair* regs,
511 BasicType ret_type);
512
513 // A compiled caller has just called the interpreter, but compiled code
514 // exists. Patch the caller so he no longer calls into the interpreter.
515 static void fixup_callers_callsite(Method* moop, address ret_pc);
516 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
517
518 // Slow-path Locking and Unlocking
519 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
520 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current);
521
522 // Resolving of calls
523 static address resolve_static_call_C (JavaThread* current);
524 static address resolve_virtual_call_C (JavaThread* current);
525 static address resolve_opt_virtual_call_C(JavaThread* current);
526
527 static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res);
528 static void store_inline_type_fields_to_buf(JavaThread* current, intptr_t res);
529
530 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
531 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
532 oopDesc* dest, jint dest_pos,
533 jint length, JavaThread* thread);
534
535 // handle ic miss with caller being compiled code
536 // wrong method handling (inline cache misses)
537 static address handle_wrong_method(JavaThread* current);
538 static address handle_wrong_method_abstract(JavaThread* current);
539 static address handle_wrong_method_ic_miss(JavaThread* current);
540 static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver);
541 static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS);
542
543 static address handle_unsafe_access(JavaThread* thread, address next_pc);
544
545 static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* vk);
546 #ifndef PRODUCT
547
548 // Collect and print inline cache miss statistics
549 private:
550 enum { maxICmiss_count = 100 };
551 static int _ICmiss_index; // length of IC miss histogram
552 static int _ICmiss_count[maxICmiss_count]; // miss counts
553 static address _ICmiss_at[maxICmiss_count]; // miss addresses
554 static void trace_ic_miss(address at);
555
556 public:
557 static int _ic_miss_ctr; // total # of IC misses
558 static int _wrong_method_ctr;
559 static int _resolve_static_ctr;
560 static int _resolve_virtual_ctr;
561 static int _resolve_opt_virtual_ctr;
562 static int _implicit_null_throws;
563 static int _implicit_div0_throws;
564
565 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
566 static int _jshort_array_copy_ctr; // Slow-path short array copy
567 static int _jint_array_copy_ctr; // Slow-path int array copy
568 static int _jlong_array_copy_ctr; // Slow-path long array copy
569 static int _oop_array_copy_ctr; // Slow-path oop array copy
570 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
571 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
572 static int _generic_array_copy_ctr; // Slow-path includes type decoding
573 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
574
575 static int _new_instance_ctr; // 'new' object requires GC
576 static int _new_array_ctr; // 'new' array requires GC
577 static int _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
578 static int _find_handler_ctr; // find exception handler
579 static int _rethrow_ctr; // rethrow exception
580 static int _mon_enter_stub_ctr; // monitor enter stub
581 static int _mon_exit_stub_ctr; // monitor exit stub
582 static int _mon_enter_ctr; // monitor enter slow
583 static int _mon_exit_ctr; // monitor exit slow
584 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
585
586 // Statistics code
587 // stats for "normal" compiled calls (non-interface)
588 static int64_t _nof_normal_calls; // total # of calls
589 static int64_t _nof_inlined_calls; // total # of inlined normal calls
590 static int64_t _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
591 static int64_t _nof_inlined_static_calls; // total # of inlined static calls
592 // stats for compiled interface calls
593 static int64_t _nof_interface_calls; // total # of compiled calls
594 static int64_t _nof_inlined_interface_calls; // total # of inlined interface calls
595
596 public: // for compiler
597 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
598 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
599 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
600 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
601 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
602 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
603 static void print_call_statistics(uint64_t comp_total);
604 static void print_statistics();
605 static void print_ic_miss_histogram();
606
607 #endif // PRODUCT
608 };
609
610
611 // ---------------------------------------------------------------------------
612 // Implementation of AdapterHandlerLibrary
613 //
614 // This library manages argument marshaling adapters and native wrappers.
615 // There are 2 flavors of adapters: I2C and C2I.
616 //
617 // The I2C flavor takes a stock interpreted call setup, marshals the
618 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
619 // code_begin(). It is broken to call it without an nmethod assigned.
620 // The usual behavior is to lift any register arguments up out of the
621 // stack and possibly re-pack the extra arguments to be contiguous.
622 // I2C adapters will save what the interpreter's stack pointer will be
623 // after arguments are popped, then adjust the interpreter's frame
624 // size to force alignment and possibly to repack the arguments.
625 // After re-packing, it jumps to the compiled code start. There are
626 // no safepoints in this adapter code and a GC cannot happen while
627 // marshaling is in progress.
628 //
629 // The C2I flavor takes a stock compiled call setup plus the target method in
630 // Rmethod, marshals the arguments for an interpreted call and jumps to
631 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
632 // setup. Compiled frames are fixed-size and the args are likely not in the
633 // right place. Hence all the args will likely be copied into the
634 // interpreter's frame, forcing that frame to grow. The compiled frame's
635 // outgoing stack args will be dead after the copy.
636 //
637 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
638 // also perform an official frame push & pop. They have a call to the native
639 // routine in their middles and end in a return (instead of ending in a jump).
640 // The native wrappers are stored in real nmethods instead of the BufferBlobs
641 // used by the adapters. The code generation happens here because it's very
642 // similar to what the adapters have to do.
643
644 class AdapterHandlerEntry : public CHeapObj<mtCode> {
645 friend class AdapterHandlerLibrary;
646
647 private:
648 AdapterFingerPrint* _fingerprint;
649 address _i2c_entry;
650 address _c2i_entry;
651 address _c2i_inline_entry;
652 address _c2i_inline_ro_entry;
653 address _c2i_unverified_entry;
654 address _c2i_unverified_inline_entry;
655 address _c2i_no_clinit_check_entry;
656
657 // Support for scalarized inline type calling convention
658 const GrowableArray<SigEntry>* _sig_cc;
659
660 #ifdef ASSERT
661 // Captures code and signature used to generate this adapter when
662 // verifying adapter equivalence.
663 unsigned char* _saved_code;
664 int _saved_code_length;
665 #endif
666
667 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry,
668 address c2i_inline_entry, address c2i_inline_ro_entry,
669 address c2i_unverified_entry, address c2i_unverified_inline_entry,
670 address c2i_no_clinit_check_entry) :
671 _fingerprint(fingerprint),
672 _i2c_entry(i2c_entry),
673 _c2i_entry(c2i_entry),
674 _c2i_inline_entry(c2i_inline_entry),
675 _c2i_inline_ro_entry(c2i_inline_ro_entry),
676 _c2i_unverified_entry(c2i_unverified_entry),
677 _c2i_unverified_inline_entry(c2i_unverified_inline_entry),
678 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry),
679 _sig_cc(NULL)
680 #ifdef ASSERT
681 , _saved_code_length(0)
682 #endif
683 { }
684
685 ~AdapterHandlerEntry();
686
687 public:
688 address get_i2c_entry() const { return _i2c_entry; }
689 address get_c2i_entry() const { return _c2i_entry; }
690 address get_c2i_inline_entry() const { return _c2i_inline_entry; }
691 address get_c2i_inline_ro_entry() const { return _c2i_inline_ro_entry; }
692 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
693 address get_c2i_unverified_inline_entry() const { return _c2i_unverified_inline_entry; }
694 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; }
695
696 address base_address();
697 void relocate(address new_base);
698
699 // Support for scalarized inline type calling convention
700 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; }
701 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; }
702
703 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
704
705 #ifdef ASSERT
706 // Used to verify that code generated for shared adapters is equivalent
707 void save_code (unsigned char* code, int length);
708 bool compare_code(AdapterHandlerEntry* other);
709 #endif
710
711 //virtual void print_on(outputStream* st) const; DO NOT USE
712 void print_adapter_on(outputStream* st) const;
713 };
714
715 class CompiledEntrySignature;
716
717 class AdapterHandlerLibrary: public AllStatic {
718 friend class SharedRuntime;
719 private:
720 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
721 static AdapterHandlerEntry* _abstract_method_handler;
722 static AdapterHandlerEntry* _no_arg_handler;
723 static AdapterHandlerEntry* _int_arg_handler;
724 static AdapterHandlerEntry* _obj_arg_handler;
725 static AdapterHandlerEntry* _obj_int_arg_handler;
726 static AdapterHandlerEntry* _obj_obj_arg_handler;
727
728 static BufferBlob* buffer_blob();
729 static void initialize();
730 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter,
731 CompiledEntrySignature& ces,
732 bool allocate_code_blob);
733 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method);
734 public:
735
736 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
737 address i2c_entry, address c2i_entry, address c2i_inline_entry, address c2i_inline_ro_entry,
738 address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry = NULL);
739 static void create_native_wrapper(const methodHandle& method);
740 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
741
742 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
743 static void print_handler_on(outputStream* st, const CodeBlob* b);
744 static bool contains(const CodeBlob* b);
745 #ifndef PRODUCT
746 static void print_statistics();
747 #endif // PRODUCT
748
749 };
750
751 // Utility class for computing the calling convention of the 3 types
752 // of compiled method entries:
753 // Method::_from_compiled_entry - sig_cc
754 // Method::_from_compiled_inline_ro_entry - sig_cc_ro
755 // Method::_from_compiled_inline_entry - sig
756 class CompiledEntrySignature : public StackObj {
757 Method* _method;
758 int _num_inline_args;
759 bool _has_inline_recv;
760 GrowableArray<SigEntry> *_sig;
761 GrowableArray<SigEntry> *_sig_cc;
762 GrowableArray<SigEntry> *_sig_cc_ro;
763 VMRegPair* _regs;
764 VMRegPair* _regs_cc;
765 VMRegPair* _regs_cc_ro;
766
767 int _args_on_stack;
768 int _args_on_stack_cc;
769 int _args_on_stack_cc_ro;
770
771 bool _c1_needs_stack_repair;
772 bool _c2_needs_stack_repair;
773
774 public:
775 Method* method() const { return _method; }
776
777 // Used by Method::_from_compiled_inline_entry
778 GrowableArray<SigEntry>& sig() const { return *_sig; }
779
780 // Used by Method::_from_compiled_entry
781 GrowableArray<SigEntry>& sig_cc() const { return *_sig_cc; }
782
783 // Used by Method::_from_compiled_inline_ro_entry
784 GrowableArray<SigEntry>& sig_cc_ro() const { return *_sig_cc_ro; }
785
786 VMRegPair* regs() const { return _regs; }
787 VMRegPair* regs_cc() const { return _regs_cc; }
788 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; }
789
790 int args_on_stack() const { return _args_on_stack; }
791 int args_on_stack_cc() const { return _args_on_stack_cc; }
792 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; }
793
794 int num_inline_args() const { return _num_inline_args; }
795 bool has_inline_recv() const { return _has_inline_recv; }
796
797 bool has_scalarized_args() const { return _sig != _sig_cc; }
798 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; }
799 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; }
800 CodeOffsets::Entries c1_inline_ro_entry_type() const;
801
802 CompiledEntrySignature(Method* method = NULL);
803 void compute_calling_conventions(bool init = true);
804 };
805
806 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP