1 /*
2 * Copyright (c) 1997, 2012, 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(PPC)
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 // Used to back off a spin lock that is under heavy contention
257 static void yield_all(JavaThread* thread, int attempts = 0);
258
259 static oop retrieve_receiver( Symbol* sig, frame caller );
260
261 static void register_finalizer(JavaThread* thread, oopDesc* obj);
262
263 // dtrace notifications
264 static int dtrace_object_alloc(oopDesc* o);
265 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o);
266 static int dtrace_method_entry(JavaThread* thread, Method* m);
267 static int dtrace_method_exit(JavaThread* thread, Method* m);
268
269 // Utility method for retrieving the Java thread id, returns 0 if the
270 // thread is not a well formed Java thread.
271 static jlong get_java_tid(Thread* thread);
272
273
274 // used by native wrappers to reenable yellow if overflow happened in native code
275 static void reguard_yellow_pages();
276
277 /**
278 * Fill in the "X cannot be cast to a Y" message for ClassCastException
279 *
280 * @param thr the current thread
281 * @param name the name of the class of the object attempted to be cast
282 * @return the dynamically allocated exception message (must be freed
283 * by the caller using a resource mark)
284 *
285 * BCP must refer to the current 'checkcast' opcode for the frame
286 * on top of the stack.
287 * The caller (or one of it's callers) must use a ResourceMark
288 * in order to correctly free the result.
289 */
290 static char* generate_class_cast_message(JavaThread* thr, const char* name);
291
292 /**
293 * Fill in the "X cannot be cast to a Y" message for ClassCastException
294 *
295 * @param name the name of the class of the object attempted to be cast
296 * @param klass the name of the target klass attempt
297 * @param gripe the specific kind of problem being reported
298 * @return the dynamically allocated exception message (must be freed
299 * by the caller using a resource mark)
300 *
301 * This version does not require access the frame, so it can be called
302 * from interpreted code
303 * The caller (or one of it's callers) must use a ResourceMark
304 * in order to correctly free the result.
305 */
306 static char* generate_class_cast_message(const char* name, const char* klass,
307 const char* gripe = " cannot be cast to ");
308
309 // Resolves a call site- may patch in the destination of the call into the
310 // compiled code.
311 static methodHandle resolve_helper(JavaThread *thread,
312 bool is_virtual,
313 bool is_optimized, TRAPS);
314
315 private:
316 // deopt blob
317 static void generate_deopt_blob(void);
318
319 public:
320 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
321
322 // Resets a call-site in compiled code so it will get resolved again.
323 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS);
324
325 // In the code prolog, if the klass comparison fails, the inline cache
326 // misses and the call site is patched to megamorphic
327 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS);
328
329 // Find the method that called us.
330 static methodHandle find_callee_method(JavaThread* thread, TRAPS);
331
332
333 private:
334 static Handle find_callee_info(JavaThread* thread,
335 Bytecodes::Code& bc,
336 CallInfo& callinfo, TRAPS);
337 static Handle find_callee_info_helper(JavaThread* thread,
338 vframeStream& vfst,
339 Bytecodes::Code& bc,
340 CallInfo& callinfo, TRAPS);
341
342 static address clean_virtual_call_entry();
343 static address clean_opt_virtual_call_entry();
344 static address clean_static_call_entry();
345
346 public:
347
348 // Read the array of BasicTypes from a Java signature, and compute where
349 // compiled Java code would like to put the results. Values in reg_lo and
350 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
351 // registers, those above refer to 4-byte stack slots. All stack slots are
352 // based off of the window top. SharedInfo::stack0 refers to the first usable
353 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
354 // 4-bytes higher. So for sparc because the register window save area is at
355 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
356 // will be just above it. (
357 // return value is the maximum number of VMReg stack slots the convention will use.
358 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing);
359
360 static void check_member_name_argument_is_last_argument(methodHandle method,
361 const BasicType* sig_bt,
362 const VMRegPair* regs) NOT_DEBUG_RETURN;
363
364 // Ditto except for calling C
365 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
366
367 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
368 // blobs. Unlike adapters in the tiger and earlier releases the code in these
369 // blobs does not create a new frame and are therefore virtually invisible
370 // to the stack walking code. In general these blobs extend the callers stack
371 // as needed for the conversion of argument locations.
372
373 // When calling a c2i blob the code will always call the interpreter even if
374 // by the time we reach the blob there is compiled code available. This allows
375 // the blob to pass the incoming stack pointer (the sender sp) in a known
376 // location for the interpreter to record. This is used by the frame code
377 // to correct the sender code to match up with the stack pointer when the
378 // thread left the compiled code. In addition it allows the interpreter
379 // to remove the space the c2i adapter allocated to do it argument conversion.
380
381 // Although a c2i blob will always run interpreted even if compiled code is
382 // present if we see that compiled code is present the compiled call site
383 // will be patched/re-resolved so that later calls will run compiled.
384
385 // Aditionally a c2i blob need to have a unverified entry because it can be reached
386 // in situations where the call site is an inlined cache site and may go megamorphic.
387
388 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
389 // that the interpreter before it does any call dispatch will record the current
390 // stack pointer in the interpreter frame. On return it will restore the stack
391 // pointer as needed. This means the i2c adapter code doesn't need any special
392 // handshaking path with compiled code to keep the stack walking correct.
393
394 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
395 int total_args_passed,
396 int max_arg,
397 const BasicType *sig_bt,
398 const VMRegPair *regs,
399 AdapterFingerPrint* fingerprint);
400
401 // OSR support
402
403 // OSR_migration_begin will extract the jvm state from an interpreter
404 // frame (locals, monitors) and store the data in a piece of C heap
405 // storage. This then allows the interpreter frame to be removed from the
406 // stack and the OSR nmethod to be called. That method is called with a
407 // pointer to the C heap storage. This pointer is the return value from
408 // OSR_migration_begin.
409
410 static intptr_t* OSR_migration_begin( JavaThread *thread);
411
412 // OSR_migration_end is a trivial routine. It is called after the compiled
413 // method has extracted the jvm state from the C heap that OSR_migration_begin
414 // created. It's entire job is to simply free this storage.
415 static void OSR_migration_end ( intptr_t* buf);
416
417 // Convert a sig into a calling convention register layout
418 // and find interesting things about it.
419 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
420 static VMReg name_for_receiver();
421
422 // "Top of Stack" slots that may be unused by the calling convention but must
423 // otherwise be preserved.
424 // On Intel these are not necessary and the value can be zero.
425 // On Sparc this describes the words reserved for storing a register window
426 // when an interrupt occurs.
427 static uint out_preserve_stack_slots();
428
429 // Is vector's size (in bytes) bigger than a size saved by default?
430 // For example, on x86 16 bytes XMM registers are saved by default.
431 static bool is_wide_vector(int size);
432
433 // Save and restore a native result
434 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
435 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
436
437 // Generate a native wrapper for a given method. The method takes arguments
438 // in the Java compiled code convention, marshals them to the native
439 // convention (handlizes oops, etc), transitions to native, makes the call,
440 // returns to java state (possibly blocking), unhandlizes any result and
441 // returns.
442 //
443 // The wrapper may contain special-case code if the given method
444 // is a JNI critical method, or a compiled method handle adapter,
445 // such as _invokeBasic, _linkToVirtual, etc.
446 static nmethod* generate_native_wrapper(MacroAssembler* masm,
447 methodHandle method,
448 int compile_id,
449 BasicType* sig_bt,
450 VMRegPair* regs,
451 BasicType ret_type );
452
453 // Block before entering a JNI critical method
454 static void block_for_jni_critical(JavaThread* thread);
455
456 #ifdef HAVE_DTRACE_H
457 // Generate a dtrace wrapper for a given method. The method takes arguments
458 // in the Java compiled code convention, marshals them to the native
459 // convention (handlizes oops, etc), transitions to native, makes the call,
460 // returns to java state (possibly blocking), unhandlizes any result and
461 // returns.
462 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm,
463 methodHandle method);
464
465 // dtrace support to convert a Java string to utf8
466 static void get_utf(oopDesc* src, address dst);
467 #endif // def HAVE_DTRACE_H
468
469 // A compiled caller has just called the interpreter, but compiled code
470 // exists. Patch the caller so he no longer calls into the interpreter.
471 static void fixup_callers_callsite(Method* moop, address ret_pc);
472
473 // Slow-path Locking and Unlocking
474 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
475 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock);
476
477 // Resolving of calls
478 static address resolve_static_call_C (JavaThread *thread);
479 static address resolve_virtual_call_C (JavaThread *thread);
480 static address resolve_opt_virtual_call_C(JavaThread *thread);
481
482 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
483 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
484 oopDesc* dest, jint dest_pos,
485 jint length, JavaThread* thread);
486
487 // handle ic miss with caller being compiled code
488 // wrong method handling (inline cache misses, zombie methods)
489 static address handle_wrong_method(JavaThread* thread);
490 static address handle_wrong_method_abstract(JavaThread* thread);
491 static address handle_wrong_method_ic_miss(JavaThread* thread);
492
493 #ifndef PRODUCT
494
495 // Collect and print inline cache miss statistics
496 private:
497 enum { maxICmiss_count = 100 };
498 static int _ICmiss_index; // length of IC miss histogram
499 static int _ICmiss_count[maxICmiss_count]; // miss counts
500 static address _ICmiss_at[maxICmiss_count]; // miss addresses
501 static void trace_ic_miss(address at);
502
503 public:
504 static int _monitor_enter_ctr; // monitor enter slow
505 static int _monitor_exit_ctr; // monitor exit slow
506 static int _throw_null_ctr; // throwing a null-pointer exception
507 static int _ic_miss_ctr; // total # of IC misses
508 static int _wrong_method_ctr;
509 static int _resolve_static_ctr;
510 static int _resolve_virtual_ctr;
511 static int _resolve_opt_virtual_ctr;
512 static int _implicit_null_throws;
513 static int _implicit_div0_throws;
514
515 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
516 static int _jshort_array_copy_ctr; // Slow-path short array copy
517 static int _jint_array_copy_ctr; // Slow-path int array copy
518 static int _jlong_array_copy_ctr; // Slow-path long array copy
519 static int _oop_array_copy_ctr; // Slow-path oop array copy
520 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
521 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
522 static int _generic_array_copy_ctr; // Slow-path includes type decoding
523 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
524
525 static int _new_instance_ctr; // 'new' object requires GC
526 static int _new_array_ctr; // 'new' array requires GC
527 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
528 static int _find_handler_ctr; // find exception handler
529 static int _rethrow_ctr; // rethrow exception
530 static int _mon_enter_stub_ctr; // monitor enter stub
531 static int _mon_exit_stub_ctr; // monitor exit stub
532 static int _mon_enter_ctr; // monitor enter slow
533 static int _mon_exit_ctr; // monitor exit slow
534 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
535
536 // Statistics code
537 // stats for "normal" compiled calls (non-interface)
538 static int _nof_normal_calls; // total # of calls
539 static int _nof_optimized_calls; // total # of statically-bound calls
540 static int _nof_inlined_calls; // total # of inlined normal calls
541 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
542 static int _nof_inlined_static_calls; // total # of inlined static calls
543 // stats for compiled interface calls
544 static int _nof_interface_calls; // total # of compiled calls
545 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls
546 static int _nof_inlined_interface_calls; // total # of inlined interface calls
547 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
548 // stats for runtime exceptions
549 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining
550
551 public: // for compiler
552 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
553 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
554 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
555 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
556 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
557 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
558 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
559 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
560 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
561 static void print_call_statistics(int comp_total);
562 static void print_statistics();
563 static void print_ic_miss_histogram();
564
565 #endif // PRODUCT
566 };
567
568
569 // ---------------------------------------------------------------------------
570 // Implementation of AdapterHandlerLibrary
571 //
572 // This library manages argument marshaling adapters and native wrappers.
573 // There are 2 flavors of adapters: I2C and C2I.
574 //
575 // The I2C flavor takes a stock interpreted call setup, marshals the
576 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
577 // code_begin(). It is broken to call it without an nmethod assigned.
578 // The usual behavior is to lift any register arguments up out of the
579 // stack and possibly re-pack the extra arguments to be contigious.
580 // I2C adapters will save what the interpreter's stack pointer will be
581 // after arguments are popped, then adjust the interpreter's frame
582 // size to force alignment and possibly to repack the arguments.
583 // After re-packing, it jumps to the compiled code start. There are
584 // no safepoints in this adapter code and a GC cannot happen while
585 // marshaling is in progress.
586 //
587 // The C2I flavor takes a stock compiled call setup plus the target method in
588 // Rmethod, marshals the arguments for an interpreted call and jumps to
589 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
590 // setup. Compiled frames are fixed-size and the args are likely not in the
591 // right place. Hence all the args will likely be copied into the
592 // interpreter's frame, forcing that frame to grow. The compiled frame's
593 // outgoing stack args will be dead after the copy.
594 //
595 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
596 // also perform an offical frame push & pop. They have a call to the native
597 // routine in their middles and end in a return (instead of ending in a jump).
598 // The native wrappers are stored in real nmethods instead of the BufferBlobs
599 // used by the adapters. The code generation happens here because it's very
600 // similar to what the adapters have to do.
601
602 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
603 friend class AdapterHandlerTable;
604
605 private:
606 AdapterFingerPrint* _fingerprint;
607 address _i2c_entry;
608 address _c2i_entry;
609 address _c2i_unverified_entry;
610
611 #ifdef ASSERT
612 // Captures code and signature used to generate this adapter when
613 // verifing adapter equivalence.
614 unsigned char* _saved_code;
615 int _code_length;
616 BasicType* _saved_sig;
617 int _total_args_passed;
618 #endif
619
620 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) {
621 _fingerprint = fingerprint;
622 _i2c_entry = i2c_entry;
623 _c2i_entry = c2i_entry;
624 _c2i_unverified_entry = c2i_unverified_entry;
625 #ifdef ASSERT
626 _saved_code = NULL;
627 _code_length = 0;
628 _saved_sig = NULL;
629 _total_args_passed = 0;
630 #endif
631 }
632
633 void deallocate();
634
635 // should never be used
636 AdapterHandlerEntry();
637
638 public:
639 address get_i2c_entry() const { return _i2c_entry; }
640 address get_c2i_entry() const { return _c2i_entry; }
641 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
642
643 address base_address();
644 void relocate(address new_base);
645
646 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
647
648 AdapterHandlerEntry* next() {
649 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
650 }
651
652 #ifdef ASSERT
653 // Used to verify that code generated for shared adapters is equivalent
654 void save_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt);
655 bool compare_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt);
656 #endif
657
658 //virtual void print_on(outputStream* st) const; DO NOT USE
659 void print_adapter_on(outputStream* st) const;
660 };
661
662 class AdapterHandlerLibrary: public AllStatic {
663 private:
664 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
665 static AdapterHandlerTable* _adapters;
666 static AdapterHandlerEntry* _abstract_method_handler;
667 static BufferBlob* buffer_blob();
668 static void initialize();
669
670 public:
671
672 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
673 address i2c_entry, address c2i_entry, address c2i_unverified_entry);
674 static nmethod* create_native_wrapper(methodHandle method, int compile_id);
675 static AdapterHandlerEntry* get_adapter(methodHandle method);
676
677 #ifdef HAVE_DTRACE_H
678 static nmethod* create_dtrace_nmethod (methodHandle method);
679 #endif // HAVE_DTRACE_H
680
681 static void print_handler(CodeBlob* b) { print_handler_on(tty, b); }
682 static void print_handler_on(outputStream* st, CodeBlob* b);
683 static bool contains(CodeBlob* b);
684 #ifndef PRODUCT
685 static void print_statistics();
686 #endif /* PRODUCT */
687
688 };
689
690 #endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP