1 /*
2 * Copyright (c) 1997, 2014, 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_VM_RUNTIME_SHAREDRUNTIME_HPP
26 #define SHARE_VM_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/threadLocalStorage.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
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 methodHandle resolve_sub_helper(JavaThread *thread,
53 bool is_virtual,
54 bool is_optimized, TRAPS);
55
56 // Shared stub locations
57
58 static RuntimeStub* _wrong_method_blob;
59 static RuntimeStub* _wrong_method_abstract_blob;
60 static RuntimeStub* _ic_miss_blob;
61 static RuntimeStub* _resolve_opt_virtual_call_blob;
62 static RuntimeStub* _resolve_virtual_call_blob;
63 static RuntimeStub* _resolve_static_call_blob;
64
65 static DeoptimizationBlob* _deopt_blob;
66
67 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
68 static SafepointBlob* _polling_page_safepoint_handler_blob;
69 static SafepointBlob* _polling_page_return_handler_blob;
70
71 #ifdef COMPILER2
72 static UncommonTrapBlob* _uncommon_trap_blob;
73 #endif // COMPILER2
74
75 #ifndef PRODUCT
76 // Counters
77 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
78 #endif // !PRODUCT
79
80 private:
81 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
82 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
83 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
84
85 public:
86 static void generate_stubs(void);
87
88 // max bytes for each dtrace string parameter
89 enum { max_dtrace_string_size = 256 };
90
91 // The following arithmetic routines are used on platforms that do
92 // not have machine instructions to implement their functionality.
93 // Do not remove these.
94
95 // long arithmetics
96 static jlong lmul(jlong y, jlong x);
97 static jlong ldiv(jlong y, jlong x);
98 static jlong lrem(jlong y, jlong x);
99
100 // float and double remainder
101 static jfloat frem(jfloat x, jfloat y);
102 static jdouble drem(jdouble x, jdouble y);
103
104 #ifdef __SOFTFP__
105 static jfloat fadd(jfloat x, jfloat y);
106 static jfloat fsub(jfloat x, jfloat y);
107 static jfloat fmul(jfloat x, jfloat y);
108 static jfloat fdiv(jfloat x, jfloat y);
109
110 static jdouble dadd(jdouble x, jdouble y);
111 static jdouble dsub(jdouble x, jdouble y);
112 static jdouble dmul(jdouble x, jdouble y);
113 static jdouble ddiv(jdouble x, jdouble y);
114 #endif // __SOFTFP__
115
116 // float conversion (needs to set appropriate rounding mode)
117 static jint f2i (jfloat x);
118 static jlong f2l (jfloat x);
119 static jint d2i (jdouble x);
120 static jlong d2l (jdouble x);
121 static jfloat d2f (jdouble x);
122 static jfloat l2f (jlong x);
123 static jdouble l2d (jlong x);
124
125 #ifdef __SOFTFP__
126 static jfloat i2f (jint x);
127 static jdouble i2d (jint x);
128 static jdouble f2d (jfloat x);
129 #endif // __SOFTFP__
130
131 // double trigonometrics and transcendentals
132 static jdouble dsin(jdouble x);
133 static jdouble dcos(jdouble x);
134 static jdouble dtan(jdouble x);
135 static jdouble dlog(jdouble x);
136 static jdouble dlog10(jdouble x);
137 static jdouble dexp(jdouble x);
138 static jdouble dpow(jdouble x, jdouble y);
139
140 #if defined(__SOFTFP__) || defined(E500V2)
141 static double dabs(double f);
142 #endif
143
144 #if defined(__SOFTFP__) || defined(PPC32)
145 static double dsqrt(double f);
146 #endif
147
148 #ifdef __SOFTFP__
149 // C++ compiler generates soft float instructions as well as passing
150 // float and double in registers.
151 static int fcmpl(float x, float y);
152 static int fcmpg(float x, float y);
153 static int dcmpl(double x, double y);
154 static int dcmpg(double x, double y);
155
156 static int unordered_fcmplt(float x, float y);
157 static int unordered_dcmplt(double x, double y);
158 static int unordered_fcmple(float x, float y);
159 static int unordered_dcmple(double x, double y);
160 static int unordered_fcmpge(float x, float y);
161 static int unordered_dcmpge(double x, double y);
162 static int unordered_fcmpgt(float x, float y);
163 static int unordered_dcmpgt(double x, double y);
164
165 static float fneg(float f);
166 static double dneg(double f);
167 #endif
168
169 // exception handling across interpreter/compiler boundaries
170 static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address);
171 static address exception_handler_for_return_address(JavaThread* thread, address return_address);
172
173 #if INCLUDE_ALL_GCS
174 // G1 write barriers
175 static void g1_wb_pre(oopDesc* orig, JavaThread *thread);
176 static void g1_wb_post(void* card_addr, JavaThread* thread);
177 #endif // INCLUDE_ALL_GCS
178
179 // exception handling and implicit exceptions
180 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
181 bool force_unwind, bool top_frame_only);
182 enum ImplicitExceptionKind {
183 IMPLICIT_NULL,
184 IMPLICIT_DIVIDE_BY_ZERO,
185 STACK_OVERFLOW
186 };
187 static void throw_AbstractMethodError(JavaThread* thread);
188 static void throw_IncompatibleClassChangeError(JavaThread* thread);
189 static void throw_ArithmeticException(JavaThread* thread);
190 static void throw_NullPointerException(JavaThread* thread);
191 static void throw_NullPointerException_at_call(JavaThread* thread);
192 static void throw_StackOverflowError(JavaThread* thread);
193 static address continuation_for_implicit_exception(JavaThread* thread,
194 address faulting_pc,
195 ImplicitExceptionKind exception_kind);
196
197 // Shared stub locations
198 static address get_poll_stub(address pc);
199
200 static address get_ic_miss_stub() {
201 assert(_ic_miss_blob!= NULL, "oops");
202 return _ic_miss_blob->entry_point();
203 }
204
205 static address get_handle_wrong_method_stub() {
206 assert(_wrong_method_blob!= NULL, "oops");
207 return _wrong_method_blob->entry_point();
208 }
209
210 static address get_handle_wrong_method_abstract_stub() {
211 assert(_wrong_method_abstract_blob!= NULL, "oops");
212 return _wrong_method_abstract_blob->entry_point();
213 }
214
215 #ifdef COMPILER2
216 static void generate_uncommon_trap_blob(void);
217 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
218 #endif // COMPILER2
219
220 static address get_resolve_opt_virtual_call_stub(){
221 assert(_resolve_opt_virtual_call_blob != NULL, "oops");
222 return _resolve_opt_virtual_call_blob->entry_point();
223 }
224 static address get_resolve_virtual_call_stub() {
225 assert(_resolve_virtual_call_blob != NULL, "oops");
226 return _resolve_virtual_call_blob->entry_point();
227 }
228 static address get_resolve_static_call_stub() {
229 assert(_resolve_static_call_blob != NULL, "oops");
230 return _resolve_static_call_blob->entry_point();
231 }
232
233 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
234 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
235 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; }
236
237 // Counters
238 #ifndef PRODUCT
239 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
240 #endif // PRODUCT
241
242 // Helper routine for full-speed JVMTI exception throwing support
243 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception);
244 static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL);
245
246 // RedefineClasses() tracing support for obsolete method entry
247 static int rc_trace_method_entry(JavaThread* thread, Method* m);
248
249 // To be used as the entry point for unresolved native methods.
250 static address native_method_throw_unsatisfied_link_error_entry();
251 static address native_method_throw_unsupported_operation_exception_entry();
252
253 // bytecode tracing is only used by the TraceBytecodes
254 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0;
255
256 static oop retrieve_receiver( Symbol* sig, frame caller );
257
258 static void register_finalizer(JavaThread* thread, oopDesc* obj);
259
260 // dtrace notifications
261 static int dtrace_object_alloc(oopDesc* o);
262 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o);
263 static int dtrace_method_entry(JavaThread* thread, Method* m);
264 static int dtrace_method_exit(JavaThread* thread, Method* m);
265
266 // Utility method for retrieving the Java thread id, returns 0 if the
267 // thread is not a well formed Java thread.
268 static jlong get_java_tid(Thread* thread);
269
270
271 // used by native wrappers to reenable yellow if overflow happened in native code
272 static void reguard_yellow_pages();
273
274 /**
275 * Fill in the "X cannot be cast to a Y" message for ClassCastException
276 *
277 * @param thr the current thread
278 * @param name the name of the class of the object attempted to be cast
279 * @return the dynamically allocated exception message (must be freed
280 * by the caller using a resource mark)
281 *
282 * BCP must refer to the current 'checkcast' opcode for the frame
283 * on top of the stack.
284 * The caller (or one of it's callers) must use a ResourceMark
285 * in order to correctly free the result.
286 */
287 static char* generate_class_cast_message(JavaThread* thr, const char* name);
288
289 /**
290 * Fill in the "X cannot be cast to a Y" message for ClassCastException
291 *
292 * @param name the name of the class of the object attempted to be cast
293 * @param klass the name of the target klass attempt
294 * @param gripe the specific kind of problem being reported
295 * @return the dynamically allocated exception message (must be freed
296 * by the caller using a resource mark)
297 *
298 * This version does not require access the frame, so it can be called
299 * from interpreted code
300 * The caller (or one of it's callers) must use a ResourceMark
301 * in order to correctly free the result.
302 */
303 static char* generate_class_cast_message(const char* name, const char* klass,
304 const char* gripe = " cannot be cast to ");
305
306 // Resolves a call site- may patch in the destination of the call into the
307 // compiled code.
308 static methodHandle resolve_helper(JavaThread *thread,
309 bool is_virtual,
310 bool is_optimized, TRAPS);
311
312 private:
313 // deopt blob
314 static void generate_deopt_blob(void);
315
316 public:
317 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
318
319 // Resets a call-site in compiled code so it will get resolved again.
320 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS);
321
322 // In the code prolog, if the klass comparison fails, the inline cache
323 // misses and the call site is patched to megamorphic
324 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS);
325
326 // Find the method that called us.
327 static methodHandle find_callee_method(JavaThread* thread, TRAPS);
328
329
330 private:
331 static Handle find_callee_info(JavaThread* thread,
332 Bytecodes::Code& bc,
333 CallInfo& callinfo, TRAPS);
334 static Handle find_callee_info_helper(JavaThread* thread,
335 vframeStream& vfst,
336 Bytecodes::Code& bc,
337 CallInfo& callinfo, TRAPS);
338
339 static address clean_virtual_call_entry();
340 static address clean_opt_virtual_call_entry();
341 static address clean_static_call_entry();
342
343 public:
344
345 // Read the array of BasicTypes from a Java signature, and compute where
346 // compiled Java code would like to put the results. Values in reg_lo and
347 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
348 // registers, those above refer to 4-byte stack slots. All stack slots are
349 // based off of the window top. SharedInfo::stack0 refers to the first usable
350 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
351 // 4-bytes higher. So for sparc because the register window save area is at
352 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
353 // will be just above it. (
354 // return value is the maximum number of VMReg stack slots the convention will use.
355 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing);
356
357 static void check_member_name_argument_is_last_argument(methodHandle method,
358 const BasicType* sig_bt,
359 const VMRegPair* regs) NOT_DEBUG_RETURN;
360
361 // Ditto except for calling C
362 //
363 // C argument in register AND stack slot.
364 // Some architectures require that an argument must be passed in a register
365 // AND in a stack slot. These architectures provide a second VMRegPair array
366 // to be filled by the c_calling_convention method. On other architectures,
367 // NULL is being passed as the second VMRegPair array, so arguments are either
368 // passed in a register OR in a stack slot.
369 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
370 int total_args_passed);
371
372 // Compute the new number of arguments in the signature if 32 bit ints
373 // must be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs
374 // is true.
375 static int convert_ints_to_longints_argcnt(int in_args_count, BasicType* in_sig_bt);
376 // Adapt a method's signature if it contains 32 bit integers that must
377 // be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs
378 // is true.
379 static void convert_ints_to_longints(int i2l_argcnt, int& in_args_count,
380 BasicType*& in_sig_bt, VMRegPair*& in_regs);
381
382 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
383 // blobs. Unlike adapters in the tiger and earlier releases the code in these
384 // blobs does not create a new frame and are therefore virtually invisible
385 // to the stack walking code. In general these blobs extend the callers stack
386 // as needed for the conversion of argument locations.
387
388 // When calling a c2i blob the code will always call the interpreter even if
389 // by the time we reach the blob there is compiled code available. This allows
390 // the blob to pass the incoming stack pointer (the sender sp) in a known
391 // location for the interpreter to record. This is used by the frame code
392 // to correct the sender code to match up with the stack pointer when the
393 // thread left the compiled code. In addition it allows the interpreter
394 // to remove the space the c2i adapter allocated to do its argument conversion.
395
396 // Although a c2i blob will always run interpreted even if compiled code is
397 // present if we see that compiled code is present the compiled call site
398 // will be patched/re-resolved so that later calls will run compiled.
399
400 // Additionally a c2i blob need to have a unverified entry because it can be reached
401 // in situations where the call site is an inlined cache site and may go megamorphic.
402
403 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
404 // that the interpreter before it does any call dispatch will record the current
405 // stack pointer in the interpreter frame. On return it will restore the stack
406 // pointer as needed. This means the i2c adapter code doesn't need any special
407 // handshaking path with compiled code to keep the stack walking correct.
408
409 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
410 int total_args_passed,
411 int max_arg,
412 const BasicType *sig_bt,
413 const VMRegPair *regs,
414 AdapterFingerPrint* fingerprint);
415
416 // OSR support
417
418 // OSR_migration_begin will extract the jvm state from an interpreter
419 // frame (locals, monitors) and store the data in a piece of C heap
420 // storage. This then allows the interpreter frame to be removed from the
421 // stack and the OSR nmethod to be called. That method is called with a
422 // pointer to the C heap storage. This pointer is the return value from
423 // OSR_migration_begin.
424
425 static intptr_t* OSR_migration_begin( JavaThread *thread);
426
427 // OSR_migration_end is a trivial routine. It is called after the compiled
428 // method has extracted the jvm state from the C heap that OSR_migration_begin
429 // created. It's entire job is to simply free this storage.
430 static void OSR_migration_end ( intptr_t* buf);
431
432 // Convert a sig into a calling convention register layout
433 // and find interesting things about it.
434 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
435 static VMReg name_for_receiver();
436
437 // "Top of Stack" slots that may be unused by the calling convention but must
438 // otherwise be preserved.
439 // On Intel these are not necessary and the value can be zero.
440 // On Sparc this describes the words reserved for storing a register window
441 // when an interrupt occurs.
442 static uint out_preserve_stack_slots();
443
444 // Is vector's size (in bytes) bigger than a size saved by default?
445 // For example, on x86 16 bytes XMM registers are saved by default.
446 static bool is_wide_vector(int size);
447
448 // Save and restore a native result
449 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
450 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
451
452 // Generate a native wrapper for a given method. The method takes arguments
453 // in the Java compiled code convention, marshals them to the native
454 // convention (handlizes oops, etc), transitions to native, makes the call,
455 // returns to java state (possibly blocking), unhandlizes any result and
456 // returns.
457 //
458 // The wrapper may contain special-case code if the given method
459 // is a JNI critical method, or a compiled method handle adapter,
460 // such as _invokeBasic, _linkToVirtual, etc.
461 static nmethod* generate_native_wrapper(MacroAssembler* masm,
462 methodHandle method,
463 int compile_id,
464 BasicType* sig_bt,
465 VMRegPair* regs,
466 BasicType ret_type );
467
468 // Block before entering a JNI critical method
469 static void block_for_jni_critical(JavaThread* thread);
470
471 #ifdef HAVE_DTRACE_H
472 // Generate a dtrace wrapper for a given method. The method takes arguments
473 // in the Java compiled code convention, marshals them to the native
474 // convention (handlizes oops, etc), transitions to native, makes the call,
475 // returns to java state (possibly blocking), unhandlizes any result and
476 // returns.
477 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm,
478 methodHandle method);
479
480 // dtrace support to convert a Java string to utf8
481 static void get_utf(oopDesc* src, address dst);
482 #endif // def HAVE_DTRACE_H
483
484 // A compiled caller has just called the interpreter, but compiled code
485 // exists. Patch the caller so he no longer calls into the interpreter.
486 static void fixup_callers_callsite(Method* moop, address ret_pc);
487
488 // Slow-path Locking and Unlocking
489 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
490 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock);
491
492 // Resolving of calls
493 static address resolve_static_call_C (JavaThread *thread);
494 static address resolve_virtual_call_C (JavaThread *thread);
495 static address resolve_opt_virtual_call_C(JavaThread *thread);
496
497 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
498 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
499 oopDesc* dest, jint dest_pos,
500 jint length, JavaThread* thread);
501
502 // handle ic miss with caller being compiled code
503 // wrong method handling (inline cache misses, zombie methods)
504 static address handle_wrong_method(JavaThread* thread);
505 static address handle_wrong_method_abstract(JavaThread* thread);
506 static address handle_wrong_method_ic_miss(JavaThread* thread);
507
508 #ifndef PRODUCT
509
510 // Collect and print inline cache miss statistics
511 private:
512 enum { maxICmiss_count = 100 };
513 static int _ICmiss_index; // length of IC miss histogram
514 static int _ICmiss_count[maxICmiss_count]; // miss counts
515 static address _ICmiss_at[maxICmiss_count]; // miss addresses
516 static void trace_ic_miss(address at);
517
518 public:
519 static int _monitor_enter_ctr; // monitor enter slow
520 static int _monitor_exit_ctr; // monitor exit slow
521 static int _throw_null_ctr; // throwing a null-pointer exception
522 static int _ic_miss_ctr; // total # of IC misses
523 static int _wrong_method_ctr;
524 static int _resolve_static_ctr;
525 static int _resolve_virtual_ctr;
526 static int _resolve_opt_virtual_ctr;
527 static int _implicit_null_throws;
528 static int _implicit_div0_throws;
529
530 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
531 static int _jshort_array_copy_ctr; // Slow-path short array copy
532 static int _jint_array_copy_ctr; // Slow-path int array copy
533 static int _jlong_array_copy_ctr; // Slow-path long array copy
534 static int _oop_array_copy_ctr; // Slow-path oop array copy
535 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
536 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
537 static int _generic_array_copy_ctr; // Slow-path includes type decoding
538 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
539
540 static int _new_instance_ctr; // 'new' object requires GC
541 static int _new_array_ctr; // 'new' array requires GC
542 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
543 static int _find_handler_ctr; // find exception handler
544 static int _rethrow_ctr; // rethrow exception
545 static int _mon_enter_stub_ctr; // monitor enter stub
546 static int _mon_exit_stub_ctr; // monitor exit stub
547 static int _mon_enter_ctr; // monitor enter slow
548 static int _mon_exit_ctr; // monitor exit slow
549 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
550
551 // Statistics code
552 // stats for "normal" compiled calls (non-interface)
553 static int _nof_normal_calls; // total # of calls
554 static int _nof_optimized_calls; // total # of statically-bound calls
555 static int _nof_inlined_calls; // total # of inlined normal calls
556 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
557 static int _nof_inlined_static_calls; // total # of inlined static calls
558 // stats for compiled interface calls
559 static int _nof_interface_calls; // total # of compiled calls
560 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls
561 static int _nof_inlined_interface_calls; // total # of inlined interface calls
562 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
563 // stats for runtime exceptions
564 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining
565
566 public: // for compiler
567 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
568 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
569 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
570 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
571 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
572 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
573 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
574 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
575 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
576 static void print_call_statistics(int comp_total);
577 static void print_statistics();
578 static void print_ic_miss_histogram();
579
580 #endif // PRODUCT
581 };
582
583
584 // ---------------------------------------------------------------------------
585 // Implementation of AdapterHandlerLibrary
586 //
587 // This library manages argument marshaling adapters and native wrappers.
588 // There are 2 flavors of adapters: I2C and C2I.
589 //
590 // The I2C flavor takes a stock interpreted call setup, marshals the
591 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
592 // code_begin(). It is broken to call it without an nmethod assigned.
593 // The usual behavior is to lift any register arguments up out of the
594 // stack and possibly re-pack the extra arguments to be contiguous.
595 // I2C adapters will save what the interpreter's stack pointer will be
596 // after arguments are popped, then adjust the interpreter's frame
597 // size to force alignment and possibly to repack the arguments.
598 // After re-packing, it jumps to the compiled code start. There are
599 // no safepoints in this adapter code and a GC cannot happen while
600 // marshaling is in progress.
601 //
602 // The C2I flavor takes a stock compiled call setup plus the target method in
603 // Rmethod, marshals the arguments for an interpreted call and jumps to
604 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
605 // setup. Compiled frames are fixed-size and the args are likely not in the
606 // right place. Hence all the args will likely be copied into the
607 // interpreter's frame, forcing that frame to grow. The compiled frame's
608 // outgoing stack args will be dead after the copy.
609 //
610 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
611 // also perform an official frame push & pop. They have a call to the native
612 // routine in their middles and end in a return (instead of ending in a jump).
613 // The native wrappers are stored in real nmethods instead of the BufferBlobs
614 // used by the adapters. The code generation happens here because it's very
615 // similar to what the adapters have to do.
616
617 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
618 friend class AdapterHandlerTable;
619
620 private:
621 AdapterFingerPrint* _fingerprint;
622 address _i2c_entry;
623 address _c2i_entry;
624 address _c2i_unverified_entry;
625
626 #ifdef ASSERT
627 // Captures code and signature used to generate this adapter when
628 // verifying adapter equivalence.
629 unsigned char* _saved_code;
630 int _saved_code_length;
631 #endif
632
633 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) {
634 _fingerprint = fingerprint;
635 _i2c_entry = i2c_entry;
636 _c2i_entry = c2i_entry;
637 _c2i_unverified_entry = c2i_unverified_entry;
638 #ifdef ASSERT
639 _saved_code = NULL;
640 _saved_code_length = 0;
641 #endif
642 }
643
644 void deallocate();
645
646 // should never be used
647 AdapterHandlerEntry();
648
649 public:
650 address get_i2c_entry() const { return _i2c_entry; }
651 address get_c2i_entry() const { return _c2i_entry; }
652 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
653 address base_address();
654 void relocate(address new_base);
655
656 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
657
658 AdapterHandlerEntry* next() {
659 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
660 }
661
662 #ifdef ASSERT
663 // Used to verify that code generated for shared adapters is equivalent
664 void save_code (unsigned char* code, int length);
665 bool compare_code(unsigned char* code, int length);
666 #endif
667
668 //virtual void print_on(outputStream* st) const; DO NOT USE
669 void print_adapter_on(outputStream* st) const;
670 };
671
672 class AdapterHandlerLibrary: public AllStatic {
673 private:
674 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
675 static AdapterHandlerTable* _adapters;
676 static AdapterHandlerEntry* _abstract_method_handler;
677 static BufferBlob* buffer_blob();
678 static void initialize();
679
680 public:
681
682 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
683 address i2c_entry, address c2i_entry, address c2i_unverified_entry);
684 static void create_native_wrapper(methodHandle method);
685 static AdapterHandlerEntry* get_adapter(methodHandle method);
686
687 #ifdef HAVE_DTRACE_H
688 static nmethod* create_dtrace_nmethod (methodHandle method);
689 #endif // HAVE_DTRACE_H
690
691 static void print_handler(CodeBlob* b) { print_handler_on(tty, b); }
692 static void print_handler_on(outputStream* st, CodeBlob* b);
693 static bool contains(CodeBlob* b);
694 #ifndef PRODUCT
695 static void print_statistics();
696 #endif /* PRODUCT */
697
698 };
699
700 #endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP