1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_RUNTIME_SHAREDRUNTIME_HPP
26 #define SHARE_RUNTIME_SHAREDRUNTIME_HPP
27
28 #include "interpreter/bytecodeHistogram.hpp"
29 #include "interpreter/bytecodeTracer.hpp"
30 #include "interpreter/linkResolver.hpp"
31 #include "memory/allocation.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "runtime/signature.hpp"
34 #include "utilities/hashtable.hpp"
35 #include "utilities/macros.hpp"
36
37 class AdapterHandlerEntry;
38 class AdapterHandlerTable;
39 class AdapterFingerPrint;
40 class vframeStream;
41 class SigEntry;
42
43 // Runtime is the base class for various runtime interfaces
44 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
45 // shared functionality such as exception forwarding (C++ to
46 // Java exceptions), locking/unlocking mechanisms, statistical
47 // information, etc.
48
49 class SharedRuntime: AllStatic {
50 friend class VMStructs;
51
52 private:
53 static bool resolve_sub_helper_internal(methodHandle callee_method, const frame& caller_frame,
54 CompiledMethod* caller_nm, bool is_virtual, bool is_optimized,
55 Handle receiver, CallInfo& call_info, Bytecodes::Code invoke_code, TRAPS);
56 static methodHandle resolve_sub_helper(JavaThread *thread,
57 bool is_virtual,
58 bool is_optimized,
59 bool* caller_is_c1, TRAPS);
60
61 // Shared stub locations
62
63 static RuntimeStub* _wrong_method_blob;
64 static RuntimeStub* _wrong_method_abstract_blob;
65 static RuntimeStub* _ic_miss_blob;
66 static RuntimeStub* _resolve_opt_virtual_call_blob;
67 static RuntimeStub* _resolve_virtual_call_blob;
68 static RuntimeStub* _resolve_static_call_blob;
69
70 static DeoptimizationBlob* _deopt_blob;
71
72 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
73 static SafepointBlob* _polling_page_safepoint_handler_blob;
74 static SafepointBlob* _polling_page_return_handler_blob;
75
76 #ifdef COMPILER2
77 static UncommonTrapBlob* _uncommon_trap_blob;
78 #endif // COMPILER2
79
80 #ifndef PRODUCT
81 // Counters
82 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
83 #endif // !PRODUCT
84
85 private:
86 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
87 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
88 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
89 public:
90 static void generate_stubs(void);
91
92 // max bytes for each dtrace string parameter
93 enum { max_dtrace_string_size = 256 };
94
95 // The following arithmetic routines are used on platforms that do
96 // not have machine instructions to implement their functionality.
97 // Do not remove these.
98
99 // long arithmetics
100 static jlong lmul(jlong y, jlong x);
101 static jlong ldiv(jlong y, jlong x);
102 static jlong lrem(jlong y, jlong x);
103
104 // float and double remainder
105 static jfloat frem(jfloat x, jfloat y);
106 static jdouble drem(jdouble x, jdouble y);
107
108
109 #ifdef _WIN64
110 // Workaround for fmod issue in the Windows x64 CRT
111 static double fmod_winx64(double x, double y);
112 #endif
113
114 #ifdef __SOFTFP__
115 static jfloat fadd(jfloat x, jfloat y);
116 static jfloat fsub(jfloat x, jfloat y);
117 static jfloat fmul(jfloat x, jfloat y);
118 static jfloat fdiv(jfloat x, jfloat y);
119
120 static jdouble dadd(jdouble x, jdouble y);
121 static jdouble dsub(jdouble x, jdouble y);
122 static jdouble dmul(jdouble x, jdouble y);
123 static jdouble ddiv(jdouble x, jdouble y);
124 #endif // __SOFTFP__
125
126 // float conversion (needs to set appropriate rounding mode)
127 static jint f2i (jfloat x);
128 static jlong f2l (jfloat x);
129 static jint d2i (jdouble x);
130 static jlong d2l (jdouble x);
131 static jfloat d2f (jdouble x);
132 static jfloat l2f (jlong x);
133 static jdouble l2d (jlong x);
134
135 #ifdef __SOFTFP__
136 static jfloat i2f (jint x);
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* thread, address return_address);
187 static address exception_handler_for_return_address(JavaThread* thread, 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* thread);
198 static void throw_IncompatibleClassChangeError(JavaThread* thread);
199 static void throw_ArithmeticException(JavaThread* thread);
200 static void throw_NullPointerException(JavaThread* thread);
201 static void throw_NullPointerException_at_call(JavaThread* thread);
202 static void throw_StackOverflowError(JavaThread* thread);
203 static void throw_delayed_StackOverflowError(JavaThread* thread);
204 static void throw_StackOverflowError_common(JavaThread* thread, bool delayed);
205 static address continuation_for_implicit_exception(JavaThread* thread,
206 address faulting_pc,
207 ImplicitExceptionKind exception_kind);
208 #if INCLUDE_JVMCI
209 static address deoptimize_for_implicit_exception(JavaThread* thread, address pc, CompiledMethod* nm, int deopt_reason);
210 #endif
211
212 // Post-slow-path-allocation, pre-initializing-stores step for
213 // implementing e.g. ReduceInitialCardMarks
214 static void on_slowpath_allocation_exit(JavaThread* thread);
215
216 static void enable_stack_reserved_zone(JavaThread* thread);
217 static frame look_for_reserved_stack_annotated_method(JavaThread* thread, frame fr);
218
219 // Shared stub locations
220 static address get_poll_stub(address pc);
221
222 static address get_ic_miss_stub() {
223 assert(_ic_miss_blob!= NULL, "oops");
224 return _ic_miss_blob->entry_point();
225 }
226
227 static address get_handle_wrong_method_stub() {
228 assert(_wrong_method_blob!= NULL, "oops");
229 return _wrong_method_blob->entry_point();
230 }
231
232 static address get_handle_wrong_method_abstract_stub() {
233 assert(_wrong_method_abstract_blob!= NULL, "oops");
234 return _wrong_method_abstract_blob->entry_point();
235 }
236
237 #ifdef COMPILER2
238 static void generate_uncommon_trap_blob(void);
239 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
240 #endif // COMPILER2
241
242 static address get_resolve_opt_virtual_call_stub() {
243 assert(_resolve_opt_virtual_call_blob != NULL, "oops");
244 return _resolve_opt_virtual_call_blob->entry_point();
245 }
246 static address get_resolve_virtual_call_stub() {
247 assert(_resolve_virtual_call_blob != NULL, "oops");
248 return _resolve_virtual_call_blob->entry_point();
249 }
250 static address get_resolve_static_call_stub() {
251 assert(_resolve_static_call_blob != NULL, "oops");
252 return _resolve_static_call_blob->entry_point();
253 }
254
255 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
256 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
257 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; }
258
259 // Counters
260 #ifndef PRODUCT
261 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
262 #endif // PRODUCT
263
264 // Helper routine for full-speed JVMTI exception throwing support
265 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception);
266 static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL);
267
268 // RedefineClasses() tracing support for obsolete method entry
269 static int rc_trace_method_entry(JavaThread* thread, Method* m);
270
271 // To be used as the entry point for unresolved native methods.
272 static address native_method_throw_unsatisfied_link_error_entry();
273 static address native_method_throw_unsupported_operation_exception_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, int size);
281 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o, int 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(Thread* thread);
288
289
290 // used by native wrappers to reenable 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(JavaThread *thread,
324 bool is_virtual,
325 bool is_optimized,
326 bool* caller_is_c1, TRAPS);
327
328 private:
329 // deopt blob
330 static void generate_deopt_blob(void);
331
332 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame,
333 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info,
334 bool& needs_ic_stub_refill, bool& is_optimized, bool caller_is_c1, TRAPS);
335
336 public:
337 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
338
339 // Resets a call-site in compiled code so it will get resolved again.
340 static methodHandle reresolve_call_site(JavaThread *thread, bool& is_optimized, bool& caller_is_c1, TRAPS);
341
342 // In the code prolog, if the klass comparison fails, the inline cache
343 // misses and the call site is patched to megamorphic
344 static methodHandle handle_ic_miss_helper(JavaThread* thread, bool& is_optimized, bool& caller_is_c1, TRAPS);
345
346 // Find the method that called us.
347 static methodHandle find_callee_method(JavaThread* thread, TRAPS);
348
349
350 static address entry_for_handle_wrong_method(methodHandle callee_method, bool is_optimized, bool caller_is_c1) {
351 assert(callee_method->verified_code_entry() != NULL, "Jump to zero!");
352 assert(callee_method->verified_value_code_entry() != NULL, "Jump to zero!");
353 assert(callee_method->verified_value_ro_code_entry() != NULL, "Jump to zero!");
354 if (caller_is_c1) {
355 return callee_method->verified_value_code_entry();
356 } else if (is_optimized) {
357 return callee_method->verified_code_entry();
358 } else {
359 return callee_method->verified_value_ro_code_entry();
360 }
361 }
362
363 private:
364 static Handle find_callee_info(JavaThread* thread,
365 Bytecodes::Code& bc,
366 CallInfo& callinfo, TRAPS);
367 static Handle find_callee_info_helper(JavaThread* thread,
368 vframeStream& vfst,
369 Bytecodes::Code& bc,
370 CallInfo& callinfo, TRAPS);
371
372 static methodHandle extract_attached_method(vframeStream& vfst);
373
374 #if defined(X86) && defined(COMPILER1)
375 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available.
376 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result);
377 #endif // X86 && COMPILER1
378
379 public:
380
381 // Read the array of BasicTypes from a Java signature, and compute where
382 // compiled Java code would like to put the results. Values in reg_lo and
383 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
384 // registers, those above refer to 4-byte stack slots. All stack slots are
385 // based off of the window top. SharedInfo::stack0 refers to the first usable
386 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
387 // 4-bytes higher. So for sparc because the register window save area is at
388 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
389 // will be just above it. (
390 // return value is the maximum number of VMReg stack slots the convention will use.
391 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing);
392 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) {
393 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length());
394 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt);
395 return java_calling_convention(sig_bt, regs, total_args_passed, false);
396 }
397 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed);
398 static const uint java_return_convention_max_int;
399 static const uint java_return_convention_max_float;
400
401 static void check_member_name_argument_is_last_argument(const methodHandle& method,
402 const BasicType* sig_bt,
403 const VMRegPair* regs) NOT_DEBUG_RETURN;
404
405 // Ditto except for calling C
406 //
407 // C argument in register AND stack slot.
408 // Some architectures require that an argument must be passed in a register
409 // AND in a stack slot. These architectures provide a second VMRegPair array
410 // to be filled by the c_calling_convention method. On other architectures,
411 // NULL is being passed as the second VMRegPair array, so arguments are either
412 // passed in a register OR in a stack slot.
413 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
414 int total_args_passed);
415
416 static size_t trampoline_size();
417
418 static void generate_trampoline(MacroAssembler *masm, address destination);
419
420 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
421 // blobs. Unlike adapters in the tiger and earlier releases the code in these
422 // blobs does not create a new frame and are therefore virtually invisible
423 // to the stack walking code. In general these blobs extend the callers stack
424 // as needed for the conversion of argument locations.
425
426 // When calling a c2i blob the code will always call the interpreter even if
427 // by the time we reach the blob there is compiled code available. This allows
428 // the blob to pass the incoming stack pointer (the sender sp) in a known
429 // location for the interpreter to record. This is used by the frame code
430 // to correct the sender code to match up with the stack pointer when the
431 // thread left the compiled code. In addition it allows the interpreter
432 // to remove the space the c2i adapter allocated to do its argument conversion.
433
434 // Although a c2i blob will always run interpreted even if compiled code is
435 // present if we see that compiled code is present the compiled call site
436 // will be patched/re-resolved so that later calls will run compiled.
437
438 // Additionally a c2i blob need to have a unverified entry because it can be reached
439 // in situations where the call site is an inlined cache site and may go megamorphic.
440
441 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
442 // that the interpreter before it does any call dispatch will record the current
443 // stack pointer in the interpreter frame. On return it will restore the stack
444 // pointer as needed. This means the i2c adapter code doesn't need any special
445 // handshaking path with compiled code to keep the stack walking correct.
446
447 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm,
448 int comp_args_on_stack,
449 const GrowableArray<SigEntry>* sig,
450 const VMRegPair* regs,
451 const GrowableArray<SigEntry>* sig_cc,
452 const VMRegPair* regs_cc,
453 const GrowableArray<SigEntry>* sig_cc_ro,
454 const VMRegPair* regs_cc_ro,
455 AdapterFingerPrint* fingerprint,
456 AdapterBlob*& new_adapter);
457
458 static void gen_i2c_adapter(MacroAssembler *_masm,
459 int comp_args_on_stack,
460 const GrowableArray<SigEntry>* sig,
461 const VMRegPair *regs);
462
463 // OSR support
464
465 // OSR_migration_begin will extract the jvm state from an interpreter
466 // frame (locals, monitors) and store the data in a piece of C heap
467 // storage. This then allows the interpreter frame to be removed from the
468 // stack and the OSR nmethod to be called. That method is called with a
469 // pointer to the C heap storage. This pointer is the return value from
470 // OSR_migration_begin.
471
472 static intptr_t* OSR_migration_begin(JavaThread *thread);
473
474 // OSR_migration_end is a trivial routine. It is called after the compiled
475 // method has extracted the jvm state from the C heap that OSR_migration_begin
476 // created. It's entire job is to simply free this storage.
477 static void OSR_migration_end(intptr_t* buf);
478
479 // Convert a sig into a calling convention register layout
480 // and find interesting things about it.
481 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
482 static VMReg name_for_receiver();
483
484 // "Top of Stack" slots that may be unused by the calling convention but must
485 // otherwise be preserved.
486 // On Intel these are not necessary and the value can be zero.
487 // On Sparc this describes the words reserved for storing a register window
488 // when an interrupt occurs.
489 static uint out_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 JNI critical method, or a compiled method handle adapter,
507 // such as _invokeBasic, _linkToVirtual, etc.
508 static nmethod* generate_native_wrapper(MacroAssembler* masm,
509 const methodHandle& method,
510 int compile_id,
511 BasicType* sig_bt,
512 VMRegPair* regs,
513 BasicType ret_type);
514
515 // Block before entering a JNI critical method
516 static void block_for_jni_critical(JavaThread* thread);
517
518 // Pin/Unpin object
519 static oopDesc* pin_object(JavaThread* thread, oopDesc* obj);
520 static void unpin_object(JavaThread* thread, oopDesc* obj);
521
522 // A compiled caller has just called the interpreter, but compiled code
523 // exists. Patch the caller so he no longer calls into the interpreter.
524 static void fixup_callers_callsite(Method* moop, address ret_pc);
525 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
526
527 // Slow-path Locking and Unlocking
528 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
529 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
530
531 // Resolving of calls
532 static address resolve_static_call_C (JavaThread *thread);
533 static address resolve_virtual_call_C (JavaThread *thread);
534 static address resolve_opt_virtual_call_C(JavaThread *thread);
535
536 static void load_value_type_fields_in_regs(JavaThread *thread, oopDesc* res);
537 static void store_value_type_fields_to_buf(JavaThread *thread, intptr_t res);
538
539 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
540 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
541 oopDesc* dest, jint dest_pos,
542 jint length, JavaThread* thread);
543
544 // handle ic miss with caller being compiled code
545 // wrong method handling (inline cache misses, zombie methods)
546 static address handle_wrong_method(JavaThread* thread);
547 static address handle_wrong_method_abstract(JavaThread* thread);
548 static address handle_wrong_method_ic_miss(JavaThread* thread);
549 static void allocate_value_types(JavaThread* thread, Method* callee, bool allocate_receiver);
550 static oop allocate_value_types_impl(JavaThread* thread, methodHandle callee, bool allocate_receiver, TRAPS);
551 static void apply_post_barriers(JavaThread* thread, objArrayOopDesc* array);
552
553 static address handle_unsafe_access(JavaThread* thread, address next_pc);
554
555 static BufferedValueTypeBlob* generate_buffered_value_type_adapter(const ValueKlass* vk);
556 #ifndef PRODUCT
557
558 // Collect and print inline cache miss statistics
559 private:
560 enum { maxICmiss_count = 100 };
561 static int _ICmiss_index; // length of IC miss histogram
562 static int _ICmiss_count[maxICmiss_count]; // miss counts
563 static address _ICmiss_at[maxICmiss_count]; // miss addresses
564 static void trace_ic_miss(address at);
565
566 public:
567 static int _throw_null_ctr; // throwing a null-pointer exception
568 static int _ic_miss_ctr; // total # of IC misses
569 static int _wrong_method_ctr;
570 static int _resolve_static_ctr;
571 static int _resolve_virtual_ctr;
572 static int _resolve_opt_virtual_ctr;
573 static int _implicit_null_throws;
574 static int _implicit_div0_throws;
575
576 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
577 static int _jshort_array_copy_ctr; // Slow-path short array copy
578 static int _jint_array_copy_ctr; // Slow-path int array copy
579 static int _jlong_array_copy_ctr; // Slow-path long array copy
580 static int _oop_array_copy_ctr; // Slow-path oop array copy
581 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
582 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
583 static int _generic_array_copy_ctr; // Slow-path includes type decoding
584 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
585
586 static int _new_instance_ctr; // 'new' object requires GC
587 static int _new_array_ctr; // 'new' array requires GC
588 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
589 static int _find_handler_ctr; // find exception handler
590 static int _rethrow_ctr; // rethrow exception
591 static int _mon_enter_stub_ctr; // monitor enter stub
592 static int _mon_exit_stub_ctr; // monitor exit stub
593 static int _mon_enter_ctr; // monitor enter slow
594 static int _mon_exit_ctr; // monitor exit slow
595 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
596
597 // Statistics code
598 // stats for "normal" compiled calls (non-interface)
599 static int _nof_normal_calls; // total # of calls
600 static int _nof_optimized_calls; // total # of statically-bound calls
601 static int _nof_inlined_calls; // total # of inlined normal calls
602 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
603 static int _nof_inlined_static_calls; // total # of inlined static calls
604 // stats for compiled interface calls
605 static int _nof_interface_calls; // total # of compiled calls
606 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls
607 static int _nof_inlined_interface_calls; // total # of inlined interface calls
608 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
609 // stats for runtime exceptions
610 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining
611
612 public: // for compiler
613 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
614 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
615 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
616 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
617 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
618 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
619 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
620 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
621 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
622 static void print_call_statistics(int comp_total);
623 static void print_statistics();
624 static void print_ic_miss_histogram();
625
626 #endif // PRODUCT
627 };
628
629
630 // ---------------------------------------------------------------------------
631 // Implementation of AdapterHandlerLibrary
632 //
633 // This library manages argument marshaling adapters and native wrappers.
634 // There are 2 flavors of adapters: I2C and C2I.
635 //
636 // The I2C flavor takes a stock interpreted call setup, marshals the
637 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
638 // code_begin(). It is broken to call it without an nmethod assigned.
639 // The usual behavior is to lift any register arguments up out of the
640 // stack and possibly re-pack the extra arguments to be contiguous.
641 // I2C adapters will save what the interpreter's stack pointer will be
642 // after arguments are popped, then adjust the interpreter's frame
643 // size to force alignment and possibly to repack the arguments.
644 // After re-packing, it jumps to the compiled code start. There are
645 // no safepoints in this adapter code and a GC cannot happen while
646 // marshaling is in progress.
647 //
648 // The C2I flavor takes a stock compiled call setup plus the target method in
649 // Rmethod, marshals the arguments for an interpreted call and jumps to
650 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
651 // setup. Compiled frames are fixed-size and the args are likely not in the
652 // right place. Hence all the args will likely be copied into the
653 // interpreter's frame, forcing that frame to grow. The compiled frame's
654 // outgoing stack args will be dead after the copy.
655 //
656 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
657 // also perform an official frame push & pop. They have a call to the native
658 // routine in their middles and end in a return (instead of ending in a jump).
659 // The native wrappers are stored in real nmethods instead of the BufferBlobs
660 // used by the adapters. The code generation happens here because it's very
661 // similar to what the adapters have to do.
662
663 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
664 friend class AdapterHandlerTable;
665
666 private:
667 AdapterFingerPrint* _fingerprint;
668 address _i2c_entry;
669 address _c2i_entry;
670 address _c2i_value_entry;
671 address _c2i_value_ro_entry;
672 address _c2i_unverified_entry;
673
674 // Support for scalarized value type calling convention
675 const GrowableArray<SigEntry>* _sig_cc;
676
677 #ifdef ASSERT
678 // Captures code and signature used to generate this adapter when
679 // verifying adapter equivalence.
680 unsigned char* _saved_code;
681 int _saved_code_length;
682 #endif
683
684 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_value_entry, address c2i_value_ro_entry, address c2i_unverified_entry) {
685 _fingerprint = fingerprint;
686 _i2c_entry = i2c_entry;
687 _c2i_entry = c2i_entry;
688 _c2i_value_entry = c2i_value_entry;
689 _c2i_value_ro_entry = c2i_value_ro_entry;
690 _c2i_unverified_entry = c2i_unverified_entry;
691 _sig_cc = NULL;
692 #ifdef ASSERT
693 _saved_code = NULL;
694 _saved_code_length = 0;
695 #endif
696 }
697
698 void deallocate();
699
700 // should never be used
701 AdapterHandlerEntry();
702
703 public:
704 address get_i2c_entry() const { return _i2c_entry; }
705 address get_c2i_entry() const { return _c2i_entry; }
706 address get_c2i_value_entry() const { return _c2i_value_entry; }
707 address get_c2i_value_ro_entry() const { return _c2i_value_ro_entry; }
708 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
709 address base_address();
710 void relocate(address new_base);
711
712 // Support for scalarized value type calling convention
713 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; }
714 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; }
715
716 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
717
718 AdapterHandlerEntry* next() {
719 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
720 }
721
722 #ifdef ASSERT
723 // Used to verify that code generated for shared adapters is equivalent
724 void save_code (unsigned char* code, int length);
725 bool compare_code(unsigned char* code, int length);
726 #endif
727
728 //virtual void print_on(outputStream* st) const; DO NOT USE
729 void print_adapter_on(outputStream* st) const;
730 };
731
732 // This class is used only with DumpSharedSpaces==true. It holds extra information
733 // that's used only during CDS dump time.
734 // For details, see comments around Method::link_method()
735 class CDSAdapterHandlerEntry: public AdapterHandlerEntry {
736 address _c2i_entry_trampoline; // allocated from shared spaces "MC" region
737 AdapterHandlerEntry** _adapter_trampoline; // allocated from shared spaces "MD" region
738
739 public:
740 address get_c2i_entry_trampoline() const { return _c2i_entry_trampoline; }
741 AdapterHandlerEntry** get_adapter_trampoline() const { return _adapter_trampoline; }
742 void init() NOT_CDS_RETURN;
743 };
744
745
746 class AdapterHandlerLibrary: public AllStatic {
747 private:
748 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
749 static AdapterHandlerTable* _adapters;
750 static AdapterHandlerEntry* _abstract_method_handler;
751 static BufferBlob* buffer_blob();
752 static void initialize();
753 static AdapterHandlerEntry* get_adapter0(const methodHandle& method);
754
755 public:
756
757 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
758 address i2c_entry, address c2i_entry, address c2i_value_entry, address c2i_value_ro_entry, address c2i_unverified_entry);
759 static void create_native_wrapper(const methodHandle& method);
760 static AdapterHandlerEntry* get_adapter(const methodHandle& method);
761
762 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
763 static void print_handler_on(outputStream* st, const CodeBlob* b);
764 static bool contains(const CodeBlob* b);
765 #ifndef PRODUCT
766 static void print_statistics();
767 #endif // PRODUCT
768
769 };
770
771 // Utility class for computing the calling convention of the 3 types
772 // of compiled method entries:
773 // Method::_from_compiled_entry - sig_cc
774 // Method::_from_compiled_value_ro_entry - sig_cc_ro
775 // Method::_from_compiled_value_entry - sig
776 class CompiledEntrySignature : public StackObj {
777 Method* _method;
778 int _num_value_args;
779 bool _has_value_recv;
780 GrowableArray<SigEntry> *_sig;
781 GrowableArray<SigEntry> *_sig_cc;
782 GrowableArray<SigEntry> *_sig_cc_ro;
783 VMRegPair* _regs;
784 VMRegPair* _regs_cc;
785 VMRegPair* _regs_cc_ro;
786
787 int _args_on_stack;
788 int _args_on_stack_cc;
789 int _args_on_stack_cc_ro;
790
791 bool _c1_needs_stack_repair;
792 bool _c2_needs_stack_repair;
793 bool _has_scalarized_args;
794
795 public:
796 Method* method() const { return _method; }
797
798 // Used by Method::_from_compiled_value_entry
799 GrowableArray<SigEntry>& sig() const { return *_sig; }
800
801 // Used by Method::_from_compiled_entry
802 GrowableArray<SigEntry>& sig_cc() const { return *_sig_cc; }
803
804 // Used by Method::_from_compiled_value_ro_entry
805 GrowableArray<SigEntry>& sig_cc_ro() const { return *_sig_cc_ro; }
806
807 VMRegPair* regs() const { return _regs; }
808 VMRegPair* regs_cc() const { return _regs_cc; }
809 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; }
810
811 int args_on_stack() const { return _args_on_stack; }
812 int args_on_stack_cc() const { return _args_on_stack_cc; }
813 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; }
814
815 int num_value_args() const { return _num_value_args; }
816 bool has_value_arg() const { return _num_value_args > 0; }
817 bool has_value_recv() const { return _has_value_recv; }
818
819 bool has_scalarized_args() const { return _has_scalarized_args; }
820 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; }
821 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; }
822
823 CompiledEntrySignature(Method* method);
824 void compute_calling_conventions();
825
826 private:
827 static int compute_scalarized_cc(Method* method, GrowableArray<SigEntry>*& sig_cc, VMRegPair*& regs_cc, bool scalar_receiver);
828 static int insert_reserved_entry(GrowableArray<SigEntry>* sig_cc, VMRegPair* regs_cc, int ret_off);
829 };
830
831 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP