1 /*
2 * Copyright 1998-2010 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_runtime.cpp.incl"
27
28
29 // For debugging purposes:
30 // To force FullGCALot inside a runtime function, add the following two lines
31 //
32 // Universe::release_fullgc_alot_dummy();
33 // MarkSweep::invoke(0, "Debugging");
34 //
35 // At command line specify the parameters: -XX:+FullGCALot -XX:FullGCALotStart=100000000
36
37
38
39
40 // Compiled code entry points
41 address OptoRuntime::_new_instance_Java = NULL;
42 address OptoRuntime::_new_array_Java = NULL;
43 address OptoRuntime::_multianewarray2_Java = NULL;
44 address OptoRuntime::_multianewarray3_Java = NULL;
45 address OptoRuntime::_multianewarray4_Java = NULL;
46 address OptoRuntime::_multianewarray5_Java = NULL;
47 address OptoRuntime::_g1_wb_pre_Java = NULL;
48 address OptoRuntime::_g1_wb_post_Java = NULL;
49 address OptoRuntime::_vtable_must_compile_Java = NULL;
50 address OptoRuntime::_complete_monitor_locking_Java = NULL;
51 address OptoRuntime::_rethrow_Java = NULL;
52
53 address OptoRuntime::_slow_arraycopy_Java = NULL;
54 address OptoRuntime::_register_finalizer_Java = NULL;
55
56 # ifdef ENABLE_ZAP_DEAD_LOCALS
57 address OptoRuntime::_zap_dead_Java_locals_Java = NULL;
58 address OptoRuntime::_zap_dead_native_locals_Java = NULL;
59 # endif
60
61
62 // This should be called in an assertion at the start of OptoRuntime routines
63 // which are entered from compiled code (all of them)
64 #ifndef PRODUCT
65 static bool check_compiled_frame(JavaThread* thread) {
66 assert(thread->last_frame().is_runtime_frame(), "cannot call runtime directly from compiled code");
67 #ifdef ASSERT
68 RegisterMap map(thread, false);
69 frame caller = thread->last_frame().sender(&map);
70 assert(caller.is_compiled_frame(), "not being called from compiled like code");
71 #endif /* ASSERT */
72 return true;
73 }
74 #endif
75
76
77 #define gen(env, var, type_func_gen, c_func, fancy_jump, pass_tls, save_arg_regs, return_pc) \
78 var = generate_stub(env, type_func_gen, CAST_FROM_FN_PTR(address, c_func), #var, fancy_jump, pass_tls, save_arg_regs, return_pc)
79
80 void OptoRuntime::generate(ciEnv* env) {
81
82 generate_exception_blob();
83
84 // Note: tls: Means fetching the return oop out of the thread-local storage
85 //
86 // variable/name type-function-gen , runtime method ,fncy_jp, tls,save_args,retpc
87 // -------------------------------------------------------------------------------------------------------------------------------
88 gen(env, _new_instance_Java , new_instance_Type , new_instance_C , 0 , true , false, false);
89 gen(env, _new_array_Java , new_array_Type , new_array_C , 0 , true , false, false);
90 gen(env, _multianewarray2_Java , multianewarray2_Type , multianewarray2_C , 0 , true , false, false);
91 gen(env, _multianewarray3_Java , multianewarray3_Type , multianewarray3_C , 0 , true , false, false);
92 gen(env, _multianewarray4_Java , multianewarray4_Type , multianewarray4_C , 0 , true , false, false);
93 gen(env, _multianewarray5_Java , multianewarray5_Type , multianewarray5_C , 0 , true , false, false);
94 gen(env, _g1_wb_pre_Java , g1_wb_pre_Type , SharedRuntime::g1_wb_pre , 0 , false, false, false);
95 gen(env, _g1_wb_post_Java , g1_wb_post_Type , SharedRuntime::g1_wb_post , 0 , false, false, false);
96 gen(env, _complete_monitor_locking_Java , complete_monitor_enter_Type , SharedRuntime::complete_monitor_locking_C , 0 , false, false, false);
97 gen(env, _rethrow_Java , rethrow_Type , rethrow_C , 2 , true , false, true );
98
99 gen(env, _slow_arraycopy_Java , slow_arraycopy_Type , SharedRuntime::slow_arraycopy_C , 0 , false, false, false);
100 gen(env, _register_finalizer_Java , register_finalizer_Type , register_finalizer , 0 , false, false, false);
101
102 # ifdef ENABLE_ZAP_DEAD_LOCALS
103 gen(env, _zap_dead_Java_locals_Java , zap_dead_locals_Type , zap_dead_Java_locals_C , 0 , false, true , false );
104 gen(env, _zap_dead_native_locals_Java , zap_dead_locals_Type , zap_dead_native_locals_C , 0 , false, true , false );
105 # endif
106
107 }
108
109 #undef gen
110
111
112 // Helper method to do generation of RunTimeStub's
113 address OptoRuntime::generate_stub( ciEnv* env,
114 TypeFunc_generator gen, address C_function,
115 const char *name, int is_fancy_jump,
116 bool pass_tls,
117 bool save_argument_registers,
118 bool return_pc ) {
119 ResourceMark rm;
120 Compile C( env, gen, C_function, name, is_fancy_jump, pass_tls, save_argument_registers, return_pc );
121 return C.stub_entry_point();
122 }
123
124 const char* OptoRuntime::stub_name(address entry) {
125 #ifndef PRODUCT
126 CodeBlob* cb = CodeCache::find_blob(entry);
127 RuntimeStub* rs =(RuntimeStub *)cb;
128 assert(rs != NULL && rs->is_runtime_stub(), "not a runtime stub");
129 return rs->name();
130 #else
131 // Fast implementation for product mode (maybe it should be inlined too)
132 return "runtime stub";
133 #endif
134 }
135
136
137 //=============================================================================
138 // Opto compiler runtime routines
139 //=============================================================================
140
141
142 //=============================allocation======================================
143 // We failed the fast-path allocation. Now we need to do a scavenge or GC
144 // and try allocation again.
145
146 void OptoRuntime::new_store_pre_barrier(JavaThread* thread) {
147 // After any safepoint, just before going back to compiled code,
148 // we inform the GC that we will be doing initializing writes to
149 // this object in the future without emitting card-marks, so
150 // GC may take any compensating steps.
151 // NOTE: Keep this code consistent with GraphKit::store_barrier.
152
153 oop new_obj = thread->vm_result();
154 if (new_obj == NULL) return;
155
156 assert(Universe::heap()->can_elide_tlab_store_barriers(),
157 "compiler must check this first");
158 // GC may decide to give back a safer copy of new_obj.
159 new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
160 thread->set_vm_result(new_obj);
161 }
162
163 // object allocation
164 JRT_BLOCK_ENTRY(void, OptoRuntime::new_instance_C(klassOopDesc* klass, JavaThread* thread))
165 JRT_BLOCK;
166 #ifndef PRODUCT
167 SharedRuntime::_new_instance_ctr++; // new instance requires GC
168 #endif
169 assert(check_compiled_frame(thread), "incorrect caller");
170
171 // These checks are cheap to make and support reflective allocation.
172 int lh = Klass::cast(klass)->layout_helper();
173 if (Klass::layout_helper_needs_slow_path(lh)
174 || !instanceKlass::cast(klass)->is_initialized()) {
175 KlassHandle kh(THREAD, klass);
176 kh->check_valid_for_instantiation(false, THREAD);
177 if (!HAS_PENDING_EXCEPTION) {
178 instanceKlass::cast(kh())->initialize(THREAD);
179 }
180 if (!HAS_PENDING_EXCEPTION) {
181 klass = kh();
182 } else {
183 klass = NULL;
184 }
185 }
186
187 if (klass != NULL) {
188 // Scavenge and allocate an instance.
189 oop result = instanceKlass::cast(klass)->allocate_instance(THREAD);
190 thread->set_vm_result(result);
191
192 // Pass oops back through thread local storage. Our apparent type to Java
193 // is that we return an oop, but we can block on exit from this routine and
194 // a GC can trash the oop in C's return register. The generated stub will
195 // fetch the oop from TLS after any possible GC.
196 }
197
198 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
199 JRT_BLOCK_END;
200
201 if (GraphKit::use_ReduceInitialCardMarks()) {
202 // inform GC that we won't do card marks for initializing writes.
203 new_store_pre_barrier(thread);
204 }
205 JRT_END
206
207
208 // array allocation
209 JRT_BLOCK_ENTRY(void, OptoRuntime::new_array_C(klassOopDesc* array_type, int len, JavaThread *thread))
210 JRT_BLOCK;
211 #ifndef PRODUCT
212 SharedRuntime::_new_array_ctr++; // new array requires GC
213 #endif
214 assert(check_compiled_frame(thread), "incorrect caller");
215
216 // Scavenge and allocate an instance.
217 oop result;
218
219 if (Klass::cast(array_type)->oop_is_typeArray()) {
220 // The oopFactory likes to work with the element type.
221 // (We could bypass the oopFactory, since it doesn't add much value.)
222 BasicType elem_type = typeArrayKlass::cast(array_type)->element_type();
223 result = oopFactory::new_typeArray(elem_type, len, THREAD);
224 } else {
225 // Although the oopFactory likes to work with the elem_type,
226 // the compiler prefers the array_type, since it must already have
227 // that latter value in hand for the fast path.
228 klassOopDesc* elem_type = objArrayKlass::cast(array_type)->element_klass();
229 result = oopFactory::new_objArray(elem_type, len, THREAD);
230 }
231
232 // Pass oops back through thread local storage. Our apparent type to Java
233 // is that we return an oop, but we can block on exit from this routine and
234 // a GC can trash the oop in C's return register. The generated stub will
235 // fetch the oop from TLS after any possible GC.
236 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
237 thread->set_vm_result(result);
238 JRT_BLOCK_END;
239
240 if (GraphKit::use_ReduceInitialCardMarks()) {
241 // inform GC that we won't do card marks for initializing writes.
242 new_store_pre_barrier(thread);
243 }
244 JRT_END
245
246 // Note: multianewarray for one dimension is handled inline by GraphKit::new_array.
247
248 // multianewarray for 2 dimensions
249 JRT_ENTRY(void, OptoRuntime::multianewarray2_C(klassOopDesc* elem_type, int len1, int len2, JavaThread *thread))
250 #ifndef PRODUCT
251 SharedRuntime::_multi2_ctr++; // multianewarray for 1 dimension
252 #endif
253 assert(check_compiled_frame(thread), "incorrect caller");
254 assert(oop(elem_type)->is_klass(), "not a class");
255 jint dims[2];
256 dims[0] = len1;
257 dims[1] = len2;
258 oop obj = arrayKlass::cast(elem_type)->multi_allocate(2, dims, THREAD);
259 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
260 thread->set_vm_result(obj);
261 JRT_END
262
263 // multianewarray for 3 dimensions
264 JRT_ENTRY(void, OptoRuntime::multianewarray3_C(klassOopDesc* elem_type, int len1, int len2, int len3, JavaThread *thread))
265 #ifndef PRODUCT
266 SharedRuntime::_multi3_ctr++; // multianewarray for 1 dimension
267 #endif
268 assert(check_compiled_frame(thread), "incorrect caller");
269 assert(oop(elem_type)->is_klass(), "not a class");
270 jint dims[3];
271 dims[0] = len1;
272 dims[1] = len2;
273 dims[2] = len3;
274 oop obj = arrayKlass::cast(elem_type)->multi_allocate(3, dims, THREAD);
275 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
276 thread->set_vm_result(obj);
277 JRT_END
278
279 // multianewarray for 4 dimensions
280 JRT_ENTRY(void, OptoRuntime::multianewarray4_C(klassOopDesc* elem_type, int len1, int len2, int len3, int len4, JavaThread *thread))
281 #ifndef PRODUCT
282 SharedRuntime::_multi4_ctr++; // multianewarray for 1 dimension
283 #endif
284 assert(check_compiled_frame(thread), "incorrect caller");
285 assert(oop(elem_type)->is_klass(), "not a class");
286 jint dims[4];
287 dims[0] = len1;
288 dims[1] = len2;
289 dims[2] = len3;
290 dims[3] = len4;
291 oop obj = arrayKlass::cast(elem_type)->multi_allocate(4, dims, THREAD);
292 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
293 thread->set_vm_result(obj);
294 JRT_END
295
296 // multianewarray for 5 dimensions
297 JRT_ENTRY(void, OptoRuntime::multianewarray5_C(klassOopDesc* elem_type, int len1, int len2, int len3, int len4, int len5, JavaThread *thread))
298 #ifndef PRODUCT
299 SharedRuntime::_multi5_ctr++; // multianewarray for 1 dimension
300 #endif
301 assert(check_compiled_frame(thread), "incorrect caller");
302 assert(oop(elem_type)->is_klass(), "not a class");
303 jint dims[5];
304 dims[0] = len1;
305 dims[1] = len2;
306 dims[2] = len3;
307 dims[3] = len4;
308 dims[4] = len5;
309 oop obj = arrayKlass::cast(elem_type)->multi_allocate(5, dims, THREAD);
310 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
311 thread->set_vm_result(obj);
312 JRT_END
313
314 const TypeFunc *OptoRuntime::new_instance_Type() {
315 // create input type (domain)
316 const Type **fields = TypeTuple::fields(1);
317 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated
318 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
319
320 // create result type (range)
321 fields = TypeTuple::fields(1);
322 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
323
324 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
325
326 return TypeFunc::make(domain, range);
327 }
328
329
330 const TypeFunc *OptoRuntime::athrow_Type() {
331 // create input type (domain)
332 const Type **fields = TypeTuple::fields(1);
333 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated
334 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
335
336 // create result type (range)
337 fields = TypeTuple::fields(0);
338
339 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
340
341 return TypeFunc::make(domain, range);
342 }
343
344
345 const TypeFunc *OptoRuntime::new_array_Type() {
346 // create input type (domain)
347 const Type **fields = TypeTuple::fields(2);
348 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass
349 fields[TypeFunc::Parms+1] = TypeInt::INT; // array size
350 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
351
352 // create result type (range)
353 fields = TypeTuple::fields(1);
354 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
355
356 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
357
358 return TypeFunc::make(domain, range);
359 }
360
361 const TypeFunc *OptoRuntime::multianewarray_Type(int ndim) {
362 // create input type (domain)
363 const int nargs = ndim + 1;
364 const Type **fields = TypeTuple::fields(nargs);
365 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass
366 for( int i = 1; i < nargs; i++ )
367 fields[TypeFunc::Parms + i] = TypeInt::INT; // array size
368 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+nargs, fields);
369
370 // create result type (range)
371 fields = TypeTuple::fields(1);
372 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
373 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
374
375 return TypeFunc::make(domain, range);
376 }
377
378 const TypeFunc *OptoRuntime::multianewarray2_Type() {
379 return multianewarray_Type(2);
380 }
381
382 const TypeFunc *OptoRuntime::multianewarray3_Type() {
383 return multianewarray_Type(3);
384 }
385
386 const TypeFunc *OptoRuntime::multianewarray4_Type() {
387 return multianewarray_Type(4);
388 }
389
390 const TypeFunc *OptoRuntime::multianewarray5_Type() {
391 return multianewarray_Type(5);
392 }
393
394 const TypeFunc *OptoRuntime::g1_wb_pre_Type() {
395 const Type **fields = TypeTuple::fields(2);
396 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // original field value
397 fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // thread
398 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
399
400 // create result type (range)
401 fields = TypeTuple::fields(0);
402 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
403
404 return TypeFunc::make(domain, range);
405 }
406
407 const TypeFunc *OptoRuntime::g1_wb_post_Type() {
408
409 const Type **fields = TypeTuple::fields(2);
410 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Card addr
411 fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // thread
412 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
413
414 // create result type (range)
415 fields = TypeTuple::fields(0);
416 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
417
418 return TypeFunc::make(domain, range);
419 }
420
421 const TypeFunc *OptoRuntime::uncommon_trap_Type() {
422 // create input type (domain)
423 const Type **fields = TypeTuple::fields(1);
424 // symbolOop name of class to be loaded
425 fields[TypeFunc::Parms+0] = TypeInt::INT;
426 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
427
428 // create result type (range)
429 fields = TypeTuple::fields(0);
430 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
431
432 return TypeFunc::make(domain, range);
433 }
434
435 # ifdef ENABLE_ZAP_DEAD_LOCALS
436 // Type used for stub generation for zap_dead_locals.
437 // No inputs or outputs
438 const TypeFunc *OptoRuntime::zap_dead_locals_Type() {
439 // create input type (domain)
440 const Type **fields = TypeTuple::fields(0);
441 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms,fields);
442
443 // create result type (range)
444 fields = TypeTuple::fields(0);
445 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms,fields);
446
447 return TypeFunc::make(domain,range);
448 }
449 # endif
450
451
452 //-----------------------------------------------------------------------------
453 // Monitor Handling
454 const TypeFunc *OptoRuntime::complete_monitor_enter_Type() {
455 // create input type (domain)
456 const Type **fields = TypeTuple::fields(2);
457 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked
458 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock
459 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
460
461 // create result type (range)
462 fields = TypeTuple::fields(0);
463
464 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
465
466 return TypeFunc::make(domain,range);
467 }
468
469
470 //-----------------------------------------------------------------------------
471 const TypeFunc *OptoRuntime::complete_monitor_exit_Type() {
472 // create input type (domain)
473 const Type **fields = TypeTuple::fields(2);
474 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked
475 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock
476 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
477
478 // create result type (range)
479 fields = TypeTuple::fields(0);
480
481 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
482
483 return TypeFunc::make(domain,range);
484 }
485
486 const TypeFunc* OptoRuntime::flush_windows_Type() {
487 // create input type (domain)
488 const Type** fields = TypeTuple::fields(1);
489 fields[TypeFunc::Parms+0] = NULL; // void
490 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms, fields);
491
492 // create result type
493 fields = TypeTuple::fields(1);
494 fields[TypeFunc::Parms+0] = NULL; // void
495 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
496
497 return TypeFunc::make(domain, range);
498 }
499
500 const TypeFunc* OptoRuntime::l2f_Type() {
501 // create input type (domain)
502 const Type **fields = TypeTuple::fields(2);
503 fields[TypeFunc::Parms+0] = TypeLong::LONG;
504 fields[TypeFunc::Parms+1] = Type::HALF;
505 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
506
507 // create result type (range)
508 fields = TypeTuple::fields(1);
509 fields[TypeFunc::Parms+0] = Type::FLOAT;
510 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
511
512 return TypeFunc::make(domain, range);
513 }
514
515 const TypeFunc* OptoRuntime::modf_Type() {
516 const Type **fields = TypeTuple::fields(2);
517 fields[TypeFunc::Parms+0] = Type::FLOAT;
518 fields[TypeFunc::Parms+1] = Type::FLOAT;
519 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
520
521 // create result type (range)
522 fields = TypeTuple::fields(1);
523 fields[TypeFunc::Parms+0] = Type::FLOAT;
524
525 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
526
527 return TypeFunc::make(domain, range);
528 }
529
530 const TypeFunc *OptoRuntime::Math_D_D_Type() {
531 // create input type (domain)
532 const Type **fields = TypeTuple::fields(2);
533 // symbolOop name of class to be loaded
534 fields[TypeFunc::Parms+0] = Type::DOUBLE;
535 fields[TypeFunc::Parms+1] = Type::HALF;
536 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
537
538 // create result type (range)
539 fields = TypeTuple::fields(2);
540 fields[TypeFunc::Parms+0] = Type::DOUBLE;
541 fields[TypeFunc::Parms+1] = Type::HALF;
542 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
543
544 return TypeFunc::make(domain, range);
545 }
546
547 const TypeFunc* OptoRuntime::Math_DD_D_Type() {
548 const Type **fields = TypeTuple::fields(4);
549 fields[TypeFunc::Parms+0] = Type::DOUBLE;
550 fields[TypeFunc::Parms+1] = Type::HALF;
551 fields[TypeFunc::Parms+2] = Type::DOUBLE;
552 fields[TypeFunc::Parms+3] = Type::HALF;
553 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+4, fields);
554
555 // create result type (range)
556 fields = TypeTuple::fields(2);
557 fields[TypeFunc::Parms+0] = Type::DOUBLE;
558 fields[TypeFunc::Parms+1] = Type::HALF;
559 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
560
561 return TypeFunc::make(domain, range);
562 }
563
564 //-------------- currentTimeMillis
565
566 const TypeFunc* OptoRuntime::current_time_millis_Type() {
567 // create input type (domain)
568 const Type **fields = TypeTuple::fields(0);
569 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+0, fields);
570
571 // create result type (range)
572 fields = TypeTuple::fields(2);
573 fields[TypeFunc::Parms+0] = TypeLong::LONG;
574 fields[TypeFunc::Parms+1] = Type::HALF;
575 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
576
577 return TypeFunc::make(domain, range);
578 }
579
580 // arraycopy stub variations:
581 enum ArrayCopyType {
582 ac_fast, // void(ptr, ptr, size_t)
583 ac_checkcast, // int(ptr, ptr, size_t, size_t, ptr)
584 ac_slow, // void(ptr, int, ptr, int, int)
585 ac_generic // int(ptr, int, ptr, int, int)
586 };
587
588 static const TypeFunc* make_arraycopy_Type(ArrayCopyType act) {
589 // create input type (domain)
590 int num_args = (act == ac_fast ? 3 : 5);
591 int num_size_args = (act == ac_fast ? 1 : act == ac_checkcast ? 2 : 0);
592 int argcnt = num_args;
593 LP64_ONLY(argcnt += num_size_args); // halfwords for lengths
594 const Type** fields = TypeTuple::fields(argcnt);
595 int argp = TypeFunc::Parms;
596 fields[argp++] = TypePtr::NOTNULL; // src
597 if (num_size_args == 0) {
598 fields[argp++] = TypeInt::INT; // src_pos
599 }
600 fields[argp++] = TypePtr::NOTNULL; // dest
601 if (num_size_args == 0) {
602 fields[argp++] = TypeInt::INT; // dest_pos
603 fields[argp++] = TypeInt::INT; // length
604 }
605 while (num_size_args-- > 0) {
606 fields[argp++] = TypeX_X; // size in whatevers (size_t)
607 LP64_ONLY(fields[argp++] = Type::HALF); // other half of long length
608 }
609 if (act == ac_checkcast) {
610 fields[argp++] = TypePtr::NOTNULL; // super_klass
611 }
612 assert(argp == TypeFunc::Parms+argcnt, "correct decoding of act");
613 const TypeTuple* domain = TypeTuple::make(TypeFunc::Parms+argcnt, fields);
614
615 // create result type if needed
616 int retcnt = (act == ac_checkcast || act == ac_generic ? 1 : 0);
617 fields = TypeTuple::fields(1);
618 if (retcnt == 0)
619 fields[TypeFunc::Parms+0] = NULL; // void
620 else
621 fields[TypeFunc::Parms+0] = TypeInt::INT; // status result, if needed
622 const TypeTuple* range = TypeTuple::make(TypeFunc::Parms+retcnt, fields);
623 return TypeFunc::make(domain, range);
624 }
625
626 const TypeFunc* OptoRuntime::fast_arraycopy_Type() {
627 // This signature is simple: Two base pointers and a size_t.
628 return make_arraycopy_Type(ac_fast);
629 }
630
631 const TypeFunc* OptoRuntime::checkcast_arraycopy_Type() {
632 // An extension of fast_arraycopy_Type which adds type checking.
633 return make_arraycopy_Type(ac_checkcast);
634 }
635
636 const TypeFunc* OptoRuntime::slow_arraycopy_Type() {
637 // This signature is exactly the same as System.arraycopy.
638 // There are no intptr_t (int/long) arguments.
639 return make_arraycopy_Type(ac_slow);
640 }
641
642 const TypeFunc* OptoRuntime::generic_arraycopy_Type() {
643 // This signature is like System.arraycopy, except that it returns status.
644 return make_arraycopy_Type(ac_generic);
645 }
646
647
648 //------------- Interpreter state access for on stack replacement
649 const TypeFunc* OptoRuntime::osr_end_Type() {
650 // create input type (domain)
651 const Type **fields = TypeTuple::fields(1);
652 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // OSR temp buf
653 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
654
655 // create result type
656 fields = TypeTuple::fields(1);
657 // fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // locked oop
658 fields[TypeFunc::Parms+0] = NULL; // void
659 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
660 return TypeFunc::make(domain, range);
661 }
662
663 //-------------- methodData update helpers
664
665 const TypeFunc* OptoRuntime::profile_receiver_type_Type() {
666 // create input type (domain)
667 const Type **fields = TypeTuple::fields(2);
668 fields[TypeFunc::Parms+0] = TypeAryPtr::NOTNULL; // methodData pointer
669 fields[TypeFunc::Parms+1] = TypeInstPtr::BOTTOM; // receiver oop
670 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
671
672 // create result type
673 fields = TypeTuple::fields(1);
674 fields[TypeFunc::Parms+0] = NULL; // void
675 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
676 return TypeFunc::make(domain,range);
677 }
678
679 JRT_LEAF(void, OptoRuntime::profile_receiver_type_C(DataLayout* data, oopDesc* receiver))
680 if (receiver == NULL) return;
681 klassOop receiver_klass = receiver->klass();
682
683 intptr_t* mdp = ((intptr_t*)(data)) + DataLayout::header_size_in_cells();
684 int empty_row = -1; // free row, if any is encountered
685
686 // ReceiverTypeData* vc = new ReceiverTypeData(mdp);
687 for (uint row = 0; row < ReceiverTypeData::row_limit(); row++) {
688 // if (vc->receiver(row) == receiver_klass)
689 int receiver_off = ReceiverTypeData::receiver_cell_index(row);
690 intptr_t row_recv = *(mdp + receiver_off);
691 if (row_recv == (intptr_t) receiver_klass) {
692 // vc->set_receiver_count(row, vc->receiver_count(row) + DataLayout::counter_increment);
693 int count_off = ReceiverTypeData::receiver_count_cell_index(row);
694 *(mdp + count_off) += DataLayout::counter_increment;
695 return;
696 } else if (row_recv == 0) {
697 // else if (vc->receiver(row) == NULL)
698 empty_row = (int) row;
699 }
700 }
701
702 if (empty_row != -1) {
703 int receiver_off = ReceiverTypeData::receiver_cell_index(empty_row);
704 // vc->set_receiver(empty_row, receiver_klass);
705 *(mdp + receiver_off) = (intptr_t) receiver_klass;
706 // vc->set_receiver_count(empty_row, DataLayout::counter_increment);
707 int count_off = ReceiverTypeData::receiver_count_cell_index(empty_row);
708 *(mdp + count_off) = DataLayout::counter_increment;
709 } else {
710 // Receiver did not match any saved receiver and there is no empty row for it.
711 // Increment total counter to indicate polymorphic case.
712 intptr_t* count_p = (intptr_t*)(((byte*)(data)) + in_bytes(CounterData::count_offset()));
713 *count_p += DataLayout::counter_increment;
714 }
715 JRT_END
716
717 //-----------------------------------------------------------------------------
718 // implicit exception support.
719
720 static void report_null_exception_in_code_cache(address exception_pc) {
721 ResourceMark rm;
722 CodeBlob* n = CodeCache::find_blob(exception_pc);
723 if (n != NULL) {
724 tty->print_cr("#");
725 tty->print_cr("# HotSpot Runtime Error, null exception in generated code");
726 tty->print_cr("#");
727 tty->print_cr("# pc where exception happened = " INTPTR_FORMAT, exception_pc);
728
729 if (n->is_nmethod()) {
730 methodOop method = ((nmethod*)n)->method();
731 tty->print_cr("# Method where it happened %s.%s ", Klass::cast(method->method_holder())->name()->as_C_string(), method->name()->as_C_string());
732 tty->print_cr("#");
733 if (ShowMessageBoxOnError && UpdateHotSpotCompilerFileOnError) {
734 const char* title = "HotSpot Runtime Error";
735 const char* question = "Do you want to exclude compilation of this method in future runs?";
736 if (os::message_box(title, question)) {
737 CompilerOracle::append_comment_to_file("");
738 CompilerOracle::append_comment_to_file("Null exception in compiled code resulted in the following exclude");
739 CompilerOracle::append_comment_to_file("");
740 CompilerOracle::append_exclude_to_file(method);
741 tty->print_cr("#");
742 tty->print_cr("# %s has been updated to exclude the specified method", CompileCommandFile);
743 tty->print_cr("#");
744 }
745 }
746 fatal("Implicit null exception happened in compiled method");
747 } else {
748 n->print();
749 fatal("Implicit null exception happened in generated stub");
750 }
751 }
752 fatal("Implicit null exception at wrong place");
753 }
754
755
756 //-------------------------------------------------------------------------------------
757 // register policy
758
759 bool OptoRuntime::is_callee_saved_register(MachRegisterNumbers reg) {
760 assert(reg >= 0 && reg < _last_Mach_Reg, "must be a machine register");
761 switch (register_save_policy[reg]) {
762 case 'C': return false; //SOC
763 case 'E': return true ; //SOE
764 case 'N': return false; //NS
765 case 'A': return false; //AS
766 }
767 ShouldNotReachHere();
768 return false;
769 }
770
771 //-----------------------------------------------------------------------
772 // Exceptions
773 //
774
775 static void trace_exception(oop exception_oop, address exception_pc, const char* msg) PRODUCT_RETURN;
776
777 // The method is an entry that is always called by a C++ method not
778 // directly from compiled code. Compiled code will call the C++ method following.
779 // We can't allow async exception to be installed during exception processing.
780 JRT_ENTRY_NO_ASYNC(address, OptoRuntime::handle_exception_C_helper(JavaThread* thread, nmethod* &nm))
781
782 // Do not confuse exception_oop with pending_exception. The exception_oop
783 // is only used to pass arguments into the method. Not for general
784 // exception handling. DO NOT CHANGE IT to use pending_exception, since
785 // the runtime stubs checks this on exit.
786 assert(thread->exception_oop() != NULL, "exception oop is found");
787 address handler_address = NULL;
788
789 Handle exception(thread, thread->exception_oop());
790
791 if (TraceExceptions) {
792 trace_exception(exception(), thread->exception_pc(), "");
793 }
794 // for AbortVMOnException flag
795 NOT_PRODUCT(Exceptions::debug_check_abort(exception));
796
797 #ifdef ASSERT
798 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
799 // should throw an exception here
800 ShouldNotReachHere();
801 }
802 #endif
803
804
805 // new exception handling: this method is entered only from adapters
806 // exceptions from compiled java methods are handled in compiled code
807 // using rethrow node
808
809 address pc = thread->exception_pc();
810 nm = CodeCache::find_nmethod(pc);
811 assert(nm != NULL, "No NMethod found");
812 if (nm->is_native_method()) {
813 fatal("Native mathod should not have path to exception handling");
814 } else {
815 // we are switching to old paradigm: search for exception handler in caller_frame
816 // instead in exception handler of caller_frame.sender()
817
818 if (JvmtiExport::can_post_on_exceptions()) {
819 // "Full-speed catching" is not necessary here,
820 // since we're notifying the VM on every catch.
821 // Force deoptimization and the rest of the lookup
822 // will be fine.
823 deoptimize_caller_frame(thread, true);
824 }
825
826 // Check the stack guard pages. If enabled, look for handler in this frame;
827 // otherwise, forcibly unwind the frame.
828 //
829 // 4826555: use default current sp for reguard_stack instead of &nm: it's more accurate.
830 bool force_unwind = !thread->reguard_stack();
831 bool deopting = false;
832 if (nm->is_deopt_pc(pc)) {
833 deopting = true;
834 RegisterMap map(thread, false);
835 frame deoptee = thread->last_frame().sender(&map);
836 assert(deoptee.is_deoptimized_frame(), "must be deopted");
837 // Adjust the pc back to the original throwing pc
838 pc = deoptee.pc();
839 }
840
841 // If we are forcing an unwind because of stack overflow then deopt is
842 // irrelevant sice we are throwing the frame away anyway.
843
844 if (deopting && !force_unwind) {
845 handler_address = SharedRuntime::deopt_blob()->unpack_with_exception();
846 } else {
847
848 handler_address =
849 force_unwind ? NULL : nm->handler_for_exception_and_pc(exception, pc);
850
851 if (handler_address == NULL) {
852 handler_address = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true);
853 assert (handler_address != NULL, "must have compiled handler");
854 // Update the exception cache only when the unwind was not forced.
855 if (!force_unwind) {
856 nm->add_handler_for_exception_and_pc(exception,pc,handler_address);
857 }
858 } else {
859 assert(handler_address == SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true), "Must be the same");
860 }
861 }
862
863 thread->set_exception_pc(pc);
864 thread->set_exception_handler_pc(handler_address);
865 thread->set_exception_stack_size(0);
866
867 // Check if the exception PC is a MethodHandle call.
868 thread->set_is_method_handle_exception(nm->is_method_handle_return(pc));
869 }
870
871 // Restore correct return pc. Was saved above.
872 thread->set_exception_oop(exception());
873 return handler_address;
874
875 JRT_END
876
877 // We are entering here from exception_blob
878 // If there is a compiled exception handler in this method, we will continue there;
879 // otherwise we will unwind the stack and continue at the caller of top frame method
880 // Note we enter without the usual JRT wrapper. We will call a helper routine that
881 // will do the normal VM entry. We do it this way so that we can see if the nmethod
882 // we looked up the handler for has been deoptimized in the meantime. If it has been
883 // we must not use the handler and instread return the deopt blob.
884 address OptoRuntime::handle_exception_C(JavaThread* thread) {
885 //
886 // We are in Java not VM and in debug mode we have a NoHandleMark
887 //
888 #ifndef PRODUCT
889 SharedRuntime::_find_handler_ctr++; // find exception handler
890 #endif
891 debug_only(NoHandleMark __hm;)
892 nmethod* nm = NULL;
893 address handler_address = NULL;
894 {
895 // Enter the VM
896
897 ResetNoHandleMark rnhm;
898 handler_address = handle_exception_C_helper(thread, nm);
899 }
900
901 // Back in java: Use no oops, DON'T safepoint
902
903 // Now check to see if the handler we are returning is in a now
904 // deoptimized frame
905
906 if (nm != NULL) {
907 RegisterMap map(thread, false);
908 frame caller = thread->last_frame().sender(&map);
909 #ifdef ASSERT
910 assert(caller.is_compiled_frame(), "must be");
911 #endif // ASSERT
912 if (caller.is_deoptimized_frame()) {
913 handler_address = SharedRuntime::deopt_blob()->unpack_with_exception();
914 }
915 }
916 return handler_address;
917 }
918
919 //------------------------------rethrow----------------------------------------
920 // We get here after compiled code has executed a 'RethrowNode'. The callee
921 // is either throwing or rethrowing an exception. The callee-save registers
922 // have been restored, synchronized objects have been unlocked and the callee
923 // stack frame has been removed. The return address was passed in.
924 // Exception oop is passed as the 1st argument. This routine is then called
925 // from the stub. On exit, we know where to jump in the caller's code.
926 // After this C code exits, the stub will pop his frame and end in a jump
927 // (instead of a return). We enter the caller's default handler.
928 //
929 // This must be JRT_LEAF:
930 // - caller will not change its state as we cannot block on exit,
931 // therefore raw_exception_handler_for_return_address is all it takes
932 // to handle deoptimized blobs
933 //
934 // However, there needs to be a safepoint check in the middle! So compiled
935 // safepoints are completely watertight.
936 //
937 // Thus, it cannot be a leaf since it contains the No_GC_Verifier.
938 //
939 // *THIS IS NOT RECOMMENDED PROGRAMMING STYLE*
940 //
941 address OptoRuntime::rethrow_C(oopDesc* exception, JavaThread* thread, address ret_pc) {
942 #ifndef PRODUCT
943 SharedRuntime::_rethrow_ctr++; // count rethrows
944 #endif
945 assert (exception != NULL, "should have thrown a NULLPointerException");
946 #ifdef ASSERT
947 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
948 // should throw an exception here
949 ShouldNotReachHere();
950 }
951 #endif
952
953 thread->set_vm_result(exception);
954 // Frame not compiled (handles deoptimization blob)
955 return SharedRuntime::raw_exception_handler_for_return_address(ret_pc);
956 }
957
958
959 const TypeFunc *OptoRuntime::rethrow_Type() {
960 // create input type (domain)
961 const Type **fields = TypeTuple::fields(1);
962 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop
963 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields);
964
965 // create result type (range)
966 fields = TypeTuple::fields(1);
967 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop
968 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
969
970 return TypeFunc::make(domain, range);
971 }
972
973
974 void OptoRuntime::deoptimize_caller_frame(JavaThread *thread, bool doit) {
975 // Deoptimize frame
976 if (doit) {
977 // Called from within the owner thread, so no need for safepoint
978 RegisterMap reg_map(thread);
979 frame stub_frame = thread->last_frame();
980 assert(stub_frame.is_runtime_frame() || exception_blob()->contains(stub_frame.pc()), "sanity check");
981 frame caller_frame = stub_frame.sender(®_map);
982
983 // bypass VM_DeoptimizeFrame and deoptimize the frame directly
984 Deoptimization::deoptimize_frame(thread, caller_frame.id());
985 }
986 }
987
988
989 const TypeFunc *OptoRuntime::register_finalizer_Type() {
990 // create input type (domain)
991 const Type **fields = TypeTuple::fields(1);
992 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // oop; Receiver
993 // // The JavaThread* is passed to each routine as the last argument
994 // fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // JavaThread *; Executing thread
995 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields);
996
997 // create result type (range)
998 fields = TypeTuple::fields(0);
999
1000 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
1001
1002 return TypeFunc::make(domain,range);
1003 }
1004
1005
1006 //-----------------------------------------------------------------------------
1007 // Dtrace support. entry and exit probes have the same signature
1008 const TypeFunc *OptoRuntime::dtrace_method_entry_exit_Type() {
1009 // create input type (domain)
1010 const Type **fields = TypeTuple::fields(2);
1011 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage
1012 fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // methodOop; Method we are entering
1013 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
1014
1015 // create result type (range)
1016 fields = TypeTuple::fields(0);
1017
1018 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
1019
1020 return TypeFunc::make(domain,range);
1021 }
1022
1023 const TypeFunc *OptoRuntime::dtrace_object_alloc_Type() {
1024 // create input type (domain)
1025 const Type **fields = TypeTuple::fields(2);
1026 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage
1027 fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // oop; newly allocated object
1028
1029 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
1030
1031 // create result type (range)
1032 fields = TypeTuple::fields(0);
1033
1034 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
1035
1036 return TypeFunc::make(domain,range);
1037 }
1038
1039
1040 JRT_ENTRY_NO_ASYNC(void, OptoRuntime::register_finalizer(oopDesc* obj, JavaThread* thread))
1041 assert(obj->is_oop(), "must be a valid oop");
1042 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise");
1043 instanceKlass::register_finalizer(instanceOop(obj), CHECK);
1044 JRT_END
1045
1046 //-----------------------------------------------------------------------------
1047
1048 NamedCounter * volatile OptoRuntime::_named_counters = NULL;
1049
1050 //
1051 // dump the collected NamedCounters.
1052 //
1053 void OptoRuntime::print_named_counters() {
1054 int total_lock_count = 0;
1055 int eliminated_lock_count = 0;
1056
1057 NamedCounter* c = _named_counters;
1058 while (c) {
1059 if (c->tag() == NamedCounter::LockCounter || c->tag() == NamedCounter::EliminatedLockCounter) {
1060 int count = c->count();
1061 if (count > 0) {
1062 bool eliminated = c->tag() == NamedCounter::EliminatedLockCounter;
1063 if (Verbose) {
1064 tty->print_cr("%d %s%s", count, c->name(), eliminated ? " (eliminated)" : "");
1065 }
1066 total_lock_count += count;
1067 if (eliminated) {
1068 eliminated_lock_count += count;
1069 }
1070 }
1071 } else if (c->tag() == NamedCounter::BiasedLockingCounter) {
1072 BiasedLockingCounters* blc = ((BiasedLockingNamedCounter*)c)->counters();
1073 if (blc->nonzero()) {
1074 tty->print_cr("%s", c->name());
1075 blc->print_on(tty);
1076 }
1077 }
1078 c = c->next();
1079 }
1080 if (total_lock_count > 0) {
1081 tty->print_cr("dynamic locks: %d", total_lock_count);
1082 if (eliminated_lock_count) {
1083 tty->print_cr("eliminated locks: %d (%d%%)", eliminated_lock_count,
1084 (int)(eliminated_lock_count * 100.0 / total_lock_count));
1085 }
1086 }
1087 }
1088
1089 //
1090 // Allocate a new NamedCounter. The JVMState is used to generate the
1091 // name which consists of method@line for the inlining tree.
1092 //
1093
1094 NamedCounter* OptoRuntime::new_named_counter(JVMState* youngest_jvms, NamedCounter::CounterTag tag) {
1095 int max_depth = youngest_jvms->depth();
1096
1097 // Visit scopes from youngest to oldest.
1098 bool first = true;
1099 stringStream st;
1100 for (int depth = max_depth; depth >= 1; depth--) {
1101 JVMState* jvms = youngest_jvms->of_depth(depth);
1102 ciMethod* m = jvms->has_method() ? jvms->method() : NULL;
1103 if (!first) {
1104 st.print(" ");
1105 } else {
1106 first = false;
1107 }
1108 int bci = jvms->bci();
1109 if (bci < 0) bci = 0;
1110 st.print("%s.%s@%d", m->holder()->name()->as_utf8(), m->name()->as_utf8(), bci);
1111 // To print linenumbers instead of bci use: m->line_number_from_bci(bci)
1112 }
1113 NamedCounter* c;
1114 if (tag == NamedCounter::BiasedLockingCounter) {
1115 c = new BiasedLockingNamedCounter(strdup(st.as_string()));
1116 } else {
1117 c = new NamedCounter(strdup(st.as_string()), tag);
1118 }
1119
1120 // atomically add the new counter to the head of the list. We only
1121 // add counters so this is safe.
1122 NamedCounter* head;
1123 do {
1124 head = _named_counters;
1125 c->set_next(head);
1126 } while (Atomic::cmpxchg_ptr(c, &_named_counters, head) != head);
1127 return c;
1128 }
1129
1130 //-----------------------------------------------------------------------------
1131 // Non-product code
1132 #ifndef PRODUCT
1133
1134 int trace_exception_counter = 0;
1135 static void trace_exception(oop exception_oop, address exception_pc, const char* msg) {
1136 ttyLocker ttyl;
1137 trace_exception_counter++;
1138 tty->print("%d [Exception (%s): ", trace_exception_counter, msg);
1139 exception_oop->print_value();
1140 tty->print(" in ");
1141 CodeBlob* blob = CodeCache::find_blob(exception_pc);
1142 if (blob->is_nmethod()) {
1143 ((nmethod*)blob)->method()->print_value();
1144 } else if (blob->is_runtime_stub()) {
1145 tty->print("<runtime-stub>");
1146 } else {
1147 tty->print("<unknown>");
1148 }
1149 tty->print(" at " INTPTR_FORMAT, exception_pc);
1150 tty->print_cr("]");
1151 }
1152
1153 #endif // PRODUCT
1154
1155
1156 # ifdef ENABLE_ZAP_DEAD_LOCALS
1157 // Called from call sites in compiled code with oop maps (actually safepoints)
1158 // Zaps dead locals in first java frame.
1159 // Is entry because may need to lock to generate oop maps
1160 // Currently, only used for compiler frames, but someday may be used
1161 // for interpreter frames, too.
1162
1163 int OptoRuntime::ZapDeadCompiledLocals_count = 0;
1164
1165 // avoid pointers to member funcs with these helpers
1166 static bool is_java_frame( frame* f) { return f->is_java_frame(); }
1167 static bool is_native_frame(frame* f) { return f->is_native_frame(); }
1168
1169
1170 void OptoRuntime::zap_dead_java_or_native_locals(JavaThread* thread,
1171 bool (*is_this_the_right_frame_to_zap)(frame*)) {
1172 assert(JavaThread::current() == thread, "is this needed?");
1173
1174 if ( !ZapDeadCompiledLocals ) return;
1175
1176 bool skip = false;
1177
1178 if ( ZapDeadCompiledLocalsFirst == 0 ) ; // nothing special
1179 else if ( ZapDeadCompiledLocalsFirst > ZapDeadCompiledLocals_count ) skip = true;
1180 else if ( ZapDeadCompiledLocalsFirst == ZapDeadCompiledLocals_count )
1181 warning("starting zapping after skipping");
1182
1183 if ( ZapDeadCompiledLocalsLast == -1 ) ; // nothing special
1184 else if ( ZapDeadCompiledLocalsLast < ZapDeadCompiledLocals_count ) skip = true;
1185 else if ( ZapDeadCompiledLocalsLast == ZapDeadCompiledLocals_count )
1186 warning("about to zap last zap");
1187
1188 ++ZapDeadCompiledLocals_count; // counts skipped zaps, too
1189
1190 if ( skip ) return;
1191
1192 // find java frame and zap it
1193
1194 for (StackFrameStream sfs(thread); !sfs.is_done(); sfs.next()) {
1195 if (is_this_the_right_frame_to_zap(sfs.current()) ) {
1196 sfs.current()->zap_dead_locals(thread, sfs.register_map());
1197 return;
1198 }
1199 }
1200 warning("no frame found to zap in zap_dead_Java_locals_C");
1201 }
1202
1203 JRT_LEAF(void, OptoRuntime::zap_dead_Java_locals_C(JavaThread* thread))
1204 zap_dead_java_or_native_locals(thread, is_java_frame);
1205 JRT_END
1206
1207 // The following does not work because for one thing, the
1208 // thread state is wrong; it expects java, but it is native.
1209 // Also, the invariants in a native stub are different and
1210 // I'm not sure it is safe to have a MachCalRuntimeDirectNode
1211 // in there.
1212 // So for now, we do not zap in native stubs.
1213
1214 JRT_LEAF(void, OptoRuntime::zap_dead_native_locals_C(JavaThread* thread))
1215 zap_dead_java_or_native_locals(thread, is_native_frame);
1216 JRT_END
1217
1218 # endif