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rev 1026 : imported patch indy.compiler.inline.patch
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--- old/src/share/vm/runtime/sharedRuntime.hpp
+++ new/src/share/vm/runtime/sharedRuntime.hpp
1 1 /*
2 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 21 * have any questions.
22 22 *
23 23 */
24 24
25 25 class AdapterHandlerEntry;
26 26 class vframeStream;
27 27
28 28 // Runtime is the base class for various runtime interfaces
29 29 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
30 30 // shared functionality such as exception forwarding (C++ to
31 31 // Java exceptions), locking/unlocking mechanisms, statistical
32 32 // information, etc.
33 33
34 34 class SharedRuntime: AllStatic {
35 35 private:
36 36 static methodHandle resolve_sub_helper(JavaThread *thread,
37 37 bool is_virtual,
38 38 bool is_optimized, TRAPS);
39 39
40 40 // Shared stub locations
41 41
42 42 static RuntimeStub* _wrong_method_blob;
43 43 static RuntimeStub* _ic_miss_blob;
44 44 static RuntimeStub* _resolve_opt_virtual_call_blob;
45 45 static RuntimeStub* _resolve_virtual_call_blob;
46 46 static RuntimeStub* _resolve_static_call_blob;
47 47
48 48 static SafepointBlob* _polling_page_safepoint_handler_blob;
49 49 static SafepointBlob* _polling_page_return_handler_blob;
50 50 #ifdef COMPILER2
51 51 static ExceptionBlob* _exception_blob;
52 52 static UncommonTrapBlob* _uncommon_trap_blob;
53 53 #endif // COMPILER2
54 54
55 55 #ifndef PRODUCT
56 56
57 57 // Counters
58 58 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
59 59
60 60 #endif // !PRODUCT
61 61 public:
62 62
63 63 // max bytes for each dtrace string parameter
64 64 enum { max_dtrace_string_size = 256 };
65 65
66 66 // The following arithmetic routines are used on platforms that do
67 67 // not have machine instructions to implement their functionality.
68 68 // Do not remove these.
69 69
70 70 // long arithmetics
71 71 static jlong lmul(jlong y, jlong x);
72 72 static jlong ldiv(jlong y, jlong x);
73 73 static jlong lrem(jlong y, jlong x);
74 74
75 75 // float and double remainder
76 76 static jfloat frem(jfloat x, jfloat y);
77 77 static jdouble drem(jdouble x, jdouble y);
78 78
79 79 // float conversion (needs to set appropriate rounding mode)
80 80 static jint f2i (jfloat x);
81 81 static jlong f2l (jfloat x);
82 82 static jint d2i (jdouble x);
83 83 static jlong d2l (jdouble x);
84 84 static jfloat d2f (jdouble x);
85 85 static jfloat l2f (jlong x);
86 86 static jdouble l2d (jlong x);
87 87
88 88 // double trigonometrics and transcendentals
89 89 static jdouble dsin(jdouble x);
90 90 static jdouble dcos(jdouble x);
91 91 static jdouble dtan(jdouble x);
92 92 static jdouble dlog(jdouble x);
93 93 static jdouble dlog10(jdouble x);
94 94 static jdouble dexp(jdouble x);
95 95 static jdouble dpow(jdouble x, jdouble y);
96 96
97 97
98 98 // exception handling across interpreter/compiler boundaries
99 99 static address raw_exception_handler_for_return_address(address return_address);
100 100 static address exception_handler_for_return_address(address return_address);
101 101
102 102 #ifndef SERIALGC
103 103 // G1 write barriers
104 104 static void g1_wb_pre(oopDesc* orig, JavaThread *thread);
105 105 static void g1_wb_post(void* card_addr, JavaThread* thread);
106 106 #endif // !SERIALGC
107 107
108 108 // exception handling and implicit exceptions
109 109 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
110 110 bool force_unwind, bool top_frame_only);
111 111 enum ImplicitExceptionKind {
112 112 IMPLICIT_NULL,
113 113 IMPLICIT_DIVIDE_BY_ZERO,
114 114 STACK_OVERFLOW
115 115 };
116 116 static void throw_AbstractMethodError(JavaThread* thread);
117 117 static void throw_IncompatibleClassChangeError(JavaThread* thread);
118 118 static void throw_ArithmeticException(JavaThread* thread);
119 119 static void throw_NullPointerException(JavaThread* thread);
120 120 static void throw_NullPointerException_at_call(JavaThread* thread);
121 121 static void throw_StackOverflowError(JavaThread* thread);
122 122 static address continuation_for_implicit_exception(JavaThread* thread,
123 123 address faulting_pc,
124 124 ImplicitExceptionKind exception_kind);
125 125
126 126 // Shared stub locations
127 127 static address get_poll_stub(address pc);
128 128
129 129 static address get_ic_miss_stub() {
130 130 assert(_ic_miss_blob!= NULL, "oops");
131 131 return _ic_miss_blob->instructions_begin();
132 132 }
133 133
134 134 static address get_handle_wrong_method_stub() {
135 135 assert(_wrong_method_blob!= NULL, "oops");
136 136 return _wrong_method_blob->instructions_begin();
137 137 }
138 138
139 139 #ifdef COMPILER2
140 140 static void generate_uncommon_trap_blob(void);
141 141 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
142 142 #endif // COMPILER2
143 143
144 144 static address get_resolve_opt_virtual_call_stub(){
145 145 assert(_resolve_opt_virtual_call_blob != NULL, "oops");
146 146 return _resolve_opt_virtual_call_blob->instructions_begin();
147 147 }
148 148 static address get_resolve_virtual_call_stub() {
149 149 assert(_resolve_virtual_call_blob != NULL, "oops");
150 150 return _resolve_virtual_call_blob->instructions_begin();
151 151 }
152 152 static address get_resolve_static_call_stub() {
153 153 assert(_resolve_static_call_blob != NULL, "oops");
154 154 return _resolve_static_call_blob->instructions_begin();
155 155 }
156 156
157 157 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
158 158 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
159 159
160 160 // Counters
161 161 #ifndef PRODUCT
162 162 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
163 163 #endif // PRODUCT
164 164
165 165 // Helper routine for full-speed JVMTI exception throwing support
166 166 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception);
167 167 static void throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message = NULL);
168 168
169 169 // RedefineClasses() tracing support for obsolete method entry
170 170 static int rc_trace_method_entry(JavaThread* thread, methodOopDesc* m);
171 171
172 172 // To be used as the entry point for unresolved native methods.
173 173 static address native_method_throw_unsatisfied_link_error_entry();
174 174
175 175 // bytecode tracing is only used by the TraceBytecodes
176 176 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0;
177 177
178 178 // Used to back off a spin lock that is under heavy contention
179 179 static void yield_all(JavaThread* thread, int attempts = 0);
180 180
181 181 static oop retrieve_receiver( symbolHandle sig, frame caller );
182 182
183 183 static void register_finalizer(JavaThread* thread, oopDesc* obj);
184 184
185 185 // dtrace notifications
186 186 static int dtrace_object_alloc(oopDesc* o);
187 187 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o);
188 188 static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m);
189 189 static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m);
190 190
191 191 // Utility method for retrieving the Java thread id, returns 0 if the
192 192 // thread is not a well formed Java thread.
193 193 static jlong get_java_tid(Thread* thread);
194 194
195 195
196 196 // used by native wrappers to reenable yellow if overflow happened in native code
197 197 static void reguard_yellow_pages();
198 198
199 199 /**
200 200 * Fill in the "X cannot be cast to a Y" message for ClassCastException
201 201 *
202 202 * @param thr the current thread
203 203 * @param name the name of the class of the object attempted to be cast
204 204 * @return the dynamically allocated exception message (must be freed
205 205 * by the caller using a resource mark)
206 206 *
207 207 * BCP must refer to the current 'checkcast' opcode for the frame
208 208 * on top of the stack.
209 209 * The caller (or one of it's callers) must use a ResourceMark
210 210 * in order to correctly free the result.
211 211 */
212 212 static char* generate_class_cast_message(JavaThread* thr, const char* name);
213 213
214 214 /**
215 215 * Fill in the message for a WrongMethodTypeException
216 216 *
217 217 * @param thr the current thread
218 218 * @param mtype (optional) expected method type (or argument class)
219 219 * @param mhandle (optional) actual method handle (or argument)
220 220 * @return the dynamically allocated exception message
221 221 *
222 222 * BCP for the frame on top of the stack must refer to an
223 223 * 'invokevirtual' op for a method handle, or an 'invokedyamic' op.
224 224 * The caller (or one of its callers) must use a ResourceMark
225 225 * in order to correctly free the result.
226 226 */
227 227 static char* generate_wrong_method_type_message(JavaThread* thr,
228 228 oopDesc* mtype = NULL,
229 229 oopDesc* mhandle = NULL);
230 230
231 231 /** Return non-null if the mtype is a klass or Class, not a MethodType. */
232 232 static oop wrong_method_type_is_for_single_argument(JavaThread* thr,
233 233 oopDesc* mtype);
234 234
235 235 /**
236 236 * Fill in the "X cannot be cast to a Y" message for ClassCastException
237 237 *
238 238 * @param name the name of the class of the object attempted to be cast
239 239 * @param klass the name of the target klass attempt
240 240 * @param gripe the specific kind of problem being reported
241 241 * @return the dynamically allocated exception message (must be freed
242 242 * by the caller using a resource mark)
243 243 *
244 244 * This version does not require access the frame, so it can be called
245 245 * from interpreted code
246 246 * The caller (or one of it's callers) must use a ResourceMark
247 247 * in order to correctly free the result.
248 248 */
249 249 static char* generate_class_cast_message(const char* name, const char* klass,
250 250 const char* gripe = " cannot be cast to ");
251 251
252 252 // Resolves a call site- may patch in the destination of the call into the
253 253 // compiled code.
254 254 static methodHandle resolve_helper(JavaThread *thread,
255 255 bool is_virtual,
256 256 bool is_optimized, TRAPS);
257 257
258 258 static void generate_stubs(void);
259 259
260 260 private:
261 261 // deopt blob
262 262 static void generate_deopt_blob(void);
263 263 static DeoptimizationBlob* _deopt_blob;
264 264
265 265 public:
266 266 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
267 267
268 268 // Resets a call-site in compiled code so it will get resolved again.
269 269 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS);
270 270
271 271 // In the code prolog, if the klass comparison fails, the inline cache
272 272 // misses and the call site is patched to megamorphic
273 273 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS);
274 274
275 275 // Find the method that called us.
276 276 static methodHandle find_callee_method(JavaThread* thread, TRAPS);
277 277
278 278
279 279 private:
280 280 static Handle find_callee_info(JavaThread* thread,
281 281 Bytecodes::Code& bc,
282 282 CallInfo& callinfo, TRAPS);
283 283 static Handle find_callee_info_helper(JavaThread* thread,
284 284 vframeStream& vfst,
285 285 Bytecodes::Code& bc,
286 286 CallInfo& callinfo, TRAPS);
287 287
288 288 static address clean_virtual_call_entry();
289 289 static address clean_opt_virtual_call_entry();
290 290 static address clean_static_call_entry();
291 291
292 292 public:
293 293
294 294 // Read the array of BasicTypes from a Java signature, and compute where
295 295 // compiled Java code would like to put the results. Values in reg_lo and
296 296 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
297 297 // registers, those above refer to 4-byte stack slots. All stack slots are
298 298 // based off of the window top. SharedInfo::stack0 refers to the first usable
299 299 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
300 300 // 4-bytes higher. So for sparc because the register window save area is at
301 301 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
302 302 // will be just above it. (
303 303 // return value is the maximum number of VMReg stack slots the convention will use.
304 304 static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing);
305 305
306 306 // Ditto except for calling C
307 307 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
308 308
309 309 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
310 310 // blobs. Unlike adapters in the tiger and earlier releases the code in these
311 311 // blobs does not create a new frame and are therefore virtually invisible
312 312 // to the stack walking code. In general these blobs extend the callers stack
313 313 // as needed for the conversion of argument locations.
314 314
315 315 // When calling a c2i blob the code will always call the interpreter even if
316 316 // by the time we reach the blob there is compiled code available. This allows
317 317 // the blob to pass the incoming stack pointer (the sender sp) in a known
318 318 // location for the interpreter to record. This is used by the frame code
319 319 // to correct the sender code to match up with the stack pointer when the
320 320 // thread left the compiled code. In addition it allows the interpreter
321 321 // to remove the space the c2i adapter allocated to do it argument conversion.
322 322
323 323 // Although a c2i blob will always run interpreted even if compiled code is
324 324 // present if we see that compiled code is present the compiled call site
325 325 // will be patched/re-resolved so that later calls will run compiled.
326 326
327 327 // Aditionally a c2i blob need to have a unverified entry because it can be reached
328 328 // in situations where the call site is an inlined cache site and may go megamorphic.
329 329
330 330 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
331 331 // that the interpreter before it does any call dispatch will record the current
332 332 // stack pointer in the interpreter frame. On return it will restore the stack
333 333 // pointer as needed. This means the i2c adapter code doesn't need any special
334 334 // handshaking path with compiled code to keep the stack walking correct.
335 335
336 336 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
337 337 int total_args_passed,
338 338 int max_arg,
339 339 const BasicType *sig_bt,
340 340 const VMRegPair *regs);
341 341
342 342 // OSR support
343 343
344 344 // OSR_migration_begin will extract the jvm state from an interpreter
345 345 // frame (locals, monitors) and store the data in a piece of C heap
346 346 // storage. This then allows the interpreter frame to be removed from the
347 347 // stack and the OSR nmethod to be called. That method is called with a
348 348 // pointer to the C heap storage. This pointer is the return value from
349 349 // OSR_migration_begin.
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350 350
351 351 static intptr_t* OSR_migration_begin( JavaThread *thread);
352 352
353 353 // OSR_migration_end is a trivial routine. It is called after the compiled
354 354 // method has extracted the jvm state from the C heap that OSR_migration_begin
355 355 // created. It's entire job is to simply free this storage.
356 356 static void OSR_migration_end ( intptr_t* buf);
357 357
358 358 // Convert a sig into a calling convention register layout
359 359 // and find interesting things about it.
360 - static VMRegPair* find_callee_arguments(symbolOop sig, bool is_static, int *arg_size);
360 + static VMRegPair* find_callee_arguments(symbolOop sig, bool has_receiver, int *arg_size);
361 361 static VMReg name_for_receiver();
362 362
363 363 // "Top of Stack" slots that may be unused by the calling convention but must
364 364 // otherwise be preserved.
365 365 // On Intel these are not necessary and the value can be zero.
366 366 // On Sparc this describes the words reserved for storing a register window
367 367 // when an interrupt occurs.
368 368 static uint out_preserve_stack_slots();
369 369
370 370 // Save and restore a native result
371 371 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
372 372 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
373 373
374 374 // Generate a native wrapper for a given method. The method takes arguments
375 375 // in the Java compiled code convention, marshals them to the native
376 376 // convention (handlizes oops, etc), transitions to native, makes the call,
377 377 // returns to java state (possibly blocking), unhandlizes any result and
378 378 // returns.
379 379 static nmethod *generate_native_wrapper(MacroAssembler* masm,
380 380 methodHandle method,
381 381 int total_args_passed,
382 382 int max_arg,
383 383 BasicType *sig_bt,
384 384 VMRegPair *regs,
385 385 BasicType ret_type );
386 386
387 387 #ifdef HAVE_DTRACE_H
388 388 // Generate a dtrace wrapper for a given method. The method takes arguments
389 389 // in the Java compiled code convention, marshals them to the native
390 390 // convention (handlizes oops, etc), transitions to native, makes the call,
391 391 // returns to java state (possibly blocking), unhandlizes any result and
392 392 // returns.
393 393 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm,
394 394 methodHandle method);
395 395
396 396 // dtrace support to convert a Java string to utf8
397 397 static void get_utf(oopDesc* src, address dst);
398 398 #endif // def HAVE_DTRACE_H
399 399
400 400 // A compiled caller has just called the interpreter, but compiled code
401 401 // exists. Patch the caller so he no longer calls into the interpreter.
402 402 static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc);
403 403
404 404 // Slow-path Locking and Unlocking
405 405 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
406 406 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock);
407 407
408 408 // Resolving of calls
409 409 static address resolve_static_call_C (JavaThread *thread);
410 410 static address resolve_virtual_call_C (JavaThread *thread);
411 411 static address resolve_opt_virtual_call_C(JavaThread *thread);
412 412
413 413 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
414 414 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
415 415 oopDesc* dest, jint dest_pos,
416 416 jint length, JavaThread* thread);
417 417
418 418 // handle ic miss with caller being compiled code
419 419 // wrong method handling (inline cache misses, zombie methods)
420 420 static address handle_wrong_method(JavaThread* thread);
421 421 static address handle_wrong_method_ic_miss(JavaThread* thread);
422 422
423 423 #ifndef PRODUCT
424 424
425 425 // Collect and print inline cache miss statistics
426 426 private:
427 427 enum { maxICmiss_count = 100 };
428 428 static int _ICmiss_index; // length of IC miss histogram
429 429 static int _ICmiss_count[maxICmiss_count]; // miss counts
430 430 static address _ICmiss_at[maxICmiss_count]; // miss addresses
431 431 static void trace_ic_miss(address at);
432 432
433 433 public:
434 434 static int _monitor_enter_ctr; // monitor enter slow
435 435 static int _monitor_exit_ctr; // monitor exit slow
436 436 static int _throw_null_ctr; // throwing a null-pointer exception
437 437 static int _ic_miss_ctr; // total # of IC misses
438 438 static int _wrong_method_ctr;
439 439 static int _resolve_static_ctr;
440 440 static int _resolve_virtual_ctr;
441 441 static int _resolve_opt_virtual_ctr;
442 442 static int _implicit_null_throws;
443 443 static int _implicit_div0_throws;
444 444
445 445 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
446 446 static int _jshort_array_copy_ctr; // Slow-path short array copy
447 447 static int _jint_array_copy_ctr; // Slow-path int array copy
448 448 static int _jlong_array_copy_ctr; // Slow-path long array copy
449 449 static int _oop_array_copy_ctr; // Slow-path oop array copy
450 450 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
451 451 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
452 452 static int _generic_array_copy_ctr; // Slow-path includes type decoding
453 453 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
454 454
455 455 static int _new_instance_ctr; // 'new' object requires GC
456 456 static int _new_array_ctr; // 'new' array requires GC
457 457 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
458 458 static int _find_handler_ctr; // find exception handler
459 459 static int _rethrow_ctr; // rethrow exception
460 460 static int _mon_enter_stub_ctr; // monitor enter stub
461 461 static int _mon_exit_stub_ctr; // monitor exit stub
462 462 static int _mon_enter_ctr; // monitor enter slow
463 463 static int _mon_exit_ctr; // monitor exit slow
464 464 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
465 465
466 466 // Statistics code
467 467 // stats for "normal" compiled calls (non-interface)
468 468 static int _nof_normal_calls; // total # of calls
469 469 static int _nof_optimized_calls; // total # of statically-bound calls
470 470 static int _nof_inlined_calls; // total # of inlined normal calls
471 471 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
472 472 static int _nof_inlined_static_calls; // total # of inlined static calls
473 473 // stats for compiled interface calls
474 474 static int _nof_interface_calls; // total # of compiled calls
475 475 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls
476 476 static int _nof_inlined_interface_calls; // total # of inlined interface calls
477 477 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
478 478 // stats for runtime exceptions
479 479 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining
480 480
481 481 public: // for compiler
482 482 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
483 483 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
484 484 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
485 485 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
486 486 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
487 487 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
488 488 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
489 489 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
490 490 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
491 491 static void print_call_statistics(int comp_total);
492 492 static void print_statistics();
493 493 static void print_ic_miss_histogram();
494 494
495 495 #endif // PRODUCT
496 496 };
497 497
498 498
499 499 // ---------------------------------------------------------------------------
500 500 // Implementation of AdapterHandlerLibrary
501 501 //
502 502 // This library manages argument marshaling adapters and native wrappers.
503 503 // There are 2 flavors of adapters: I2C and C2I.
504 504 //
505 505 // The I2C flavor takes a stock interpreted call setup, marshals the arguments
506 506 // for a Java-compiled call, and jumps to Rmethod-> code()->
507 507 // instructions_begin(). It is broken to call it without an nmethod assigned.
508 508 // The usual behavior is to lift any register arguments up out of the stack
509 509 // and possibly re-pack the extra arguments to be contigious. I2C adapters
510 510 // will save what the interpreter's stack pointer will be after arguments are
511 511 // popped, then adjust the interpreter's frame size to force alignment and
512 512 // possibly to repack the arguments. After re-packing, it jumps to the
513 513 // compiled code start. There are no safepoints in this adapter code and a GC
514 514 // cannot happen while marshaling is in progress.
515 515 //
516 516 // The C2I flavor takes a stock compiled call setup plus the target method in
517 517 // Rmethod, marshals the arguments for an interpreted call and jumps to
518 518 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
519 519 // setup. Compiled frames are fixed-size and the args are likely not in the
520 520 // right place. Hence all the args will likely be copied into the
521 521 // interpreter's frame, forcing that frame to grow. The compiled frame's
522 522 // outgoing stack args will be dead after the copy.
523 523 //
524 524 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
525 525 // also perform an offical frame push & pop. They have a call to the native
526 526 // routine in their middles and end in a return (instead of ending in a jump).
527 527 // The native wrappers are stored in real nmethods instead of the BufferBlobs
528 528 // used by the adapters. The code generation happens here because it's very
529 529 // similar to what the adapters have to do.
530 530
531 531 class AdapterHandlerEntry : public CHeapObj {
532 532 private:
533 533 address _i2c_entry;
534 534 address _c2i_entry;
535 535 address _c2i_unverified_entry;
536 536
537 537 public:
538 538
539 539 // The name we give all buffer blobs
540 540 static const char* name;
541 541
542 542 AdapterHandlerEntry(address i2c_entry, address c2i_entry, address c2i_unverified_entry):
543 543 _i2c_entry(i2c_entry),
544 544 _c2i_entry(c2i_entry),
545 545 _c2i_unverified_entry(c2i_unverified_entry) {
546 546 }
547 547
548 548 address get_i2c_entry() { return _i2c_entry; }
549 549 address get_c2i_entry() { return _c2i_entry; }
550 550 address get_c2i_unverified_entry() { return _c2i_unverified_entry; }
551 551
552 552 void relocate(address new_base);
553 553 #ifndef PRODUCT
554 554 void print();
555 555 #endif /* PRODUCT */
556 556 };
557 557
558 558 class AdapterHandlerLibrary: public AllStatic {
559 559 private:
560 560 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
561 561 static GrowableArray<uint64_t>* _fingerprints; // the fingerprint collection
562 562 static GrowableArray<AdapterHandlerEntry*> * _handlers; // the corresponding handlers
563 563 enum {
564 564 AbstractMethodHandler = 1 // special handler for abstract methods
565 565 };
566 566 static BufferBlob* buffer_blob();
567 567 static void initialize();
568 568 static int get_create_adapter_index(methodHandle method);
569 569 static address get_i2c_entry( int index ) {
570 570 return get_entry(index)->get_i2c_entry();
571 571 }
572 572 static address get_c2i_entry( int index ) {
573 573 return get_entry(index)->get_c2i_entry();
574 574 }
575 575 static address get_c2i_unverified_entry( int index ) {
576 576 return get_entry(index)->get_c2i_unverified_entry();
577 577 }
578 578
579 579 public:
580 580 static AdapterHandlerEntry* get_entry( int index ) { return _handlers->at(index); }
581 581 static nmethod* create_native_wrapper(methodHandle method);
582 582 static AdapterHandlerEntry* get_adapter(methodHandle method) {
583 583 return get_entry(get_create_adapter_index(method));
584 584 }
585 585 #ifdef HAVE_DTRACE_H
586 586 static nmethod* create_dtrace_nmethod (methodHandle method);
587 587 #endif // HAVE_DTRACE_H
588 588
589 589 #ifndef PRODUCT
590 590 static void print_handler(CodeBlob* b);
591 591 static bool contains(CodeBlob* b);
592 592 #endif /* PRODUCT */
593 593
594 594 };
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