Fri, 25 May 2012 07:53:11 -0700
7170463: C2 should recognize "obj.getClass() == A.class" code pattern
Summary: optimize this code pattern obj.getClass() == A.class.
Reviewed-by: jrose, kvn
Contributed-by: Krystal Mok <sajia@taobao.com>
1 /*
2 * Copyright (c) 1998, 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 */
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "code/compiledIC.hpp"
29 #include "code/icBuffer.hpp"
30 #include "code/nmethod.hpp"
31 #include "code/pcDesc.hpp"
32 #include "code/scopeDesc.hpp"
33 #include "code/vtableStubs.hpp"
34 #include "compiler/compileBroker.hpp"
35 #include "compiler/compilerOracle.hpp"
36 #include "compiler/oopMap.hpp"
37 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
38 #include "gc_implementation/g1/heapRegion.hpp"
39 #include "gc_interface/collectedHeap.hpp"
40 #include "interpreter/bytecode.hpp"
41 #include "interpreter/interpreter.hpp"
42 #include "interpreter/linkResolver.hpp"
43 #include "memory/barrierSet.hpp"
44 #include "memory/gcLocker.inline.hpp"
45 #include "memory/oopFactory.hpp"
46 #include "oops/objArrayKlass.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "opto/addnode.hpp"
49 #include "opto/callnode.hpp"
50 #include "opto/cfgnode.hpp"
51 #include "opto/connode.hpp"
52 #include "opto/graphKit.hpp"
53 #include "opto/machnode.hpp"
54 #include "opto/matcher.hpp"
55 #include "opto/memnode.hpp"
56 #include "opto/mulnode.hpp"
57 #include "opto/runtime.hpp"
58 #include "opto/subnode.hpp"
59 #include "runtime/fprofiler.hpp"
60 #include "runtime/handles.inline.hpp"
61 #include "runtime/interfaceSupport.hpp"
62 #include "runtime/javaCalls.hpp"
63 #include "runtime/sharedRuntime.hpp"
64 #include "runtime/signature.hpp"
65 #include "runtime/threadCritical.hpp"
66 #include "runtime/vframe.hpp"
67 #include "runtime/vframeArray.hpp"
68 #include "runtime/vframe_hp.hpp"
69 #include "utilities/copy.hpp"
70 #include "utilities/preserveException.hpp"
71 #ifdef TARGET_ARCH_MODEL_x86_32
72 # include "adfiles/ad_x86_32.hpp"
73 #endif
74 #ifdef TARGET_ARCH_MODEL_x86_64
75 # include "adfiles/ad_x86_64.hpp"
76 #endif
77 #ifdef TARGET_ARCH_MODEL_sparc
78 # include "adfiles/ad_sparc.hpp"
79 #endif
80 #ifdef TARGET_ARCH_MODEL_zero
81 # include "adfiles/ad_zero.hpp"
82 #endif
83 #ifdef TARGET_ARCH_MODEL_arm
84 # include "adfiles/ad_arm.hpp"
85 #endif
86 #ifdef TARGET_ARCH_MODEL_ppc
87 # include "adfiles/ad_ppc.hpp"
88 #endif
91 // For debugging purposes:
92 // To force FullGCALot inside a runtime function, add the following two lines
93 //
94 // Universe::release_fullgc_alot_dummy();
95 // MarkSweep::invoke(0, "Debugging");
96 //
97 // At command line specify the parameters: -XX:+FullGCALot -XX:FullGCALotStart=100000000
102 // Compiled code entry points
103 address OptoRuntime::_new_instance_Java = NULL;
104 address OptoRuntime::_new_array_Java = NULL;
105 address OptoRuntime::_new_array_nozero_Java = NULL;
106 address OptoRuntime::_multianewarray2_Java = NULL;
107 address OptoRuntime::_multianewarray3_Java = NULL;
108 address OptoRuntime::_multianewarray4_Java = NULL;
109 address OptoRuntime::_multianewarray5_Java = NULL;
110 address OptoRuntime::_multianewarrayN_Java = NULL;
111 address OptoRuntime::_g1_wb_pre_Java = NULL;
112 address OptoRuntime::_g1_wb_post_Java = NULL;
113 address OptoRuntime::_vtable_must_compile_Java = NULL;
114 address OptoRuntime::_complete_monitor_locking_Java = NULL;
115 address OptoRuntime::_rethrow_Java = NULL;
117 address OptoRuntime::_slow_arraycopy_Java = NULL;
118 address OptoRuntime::_register_finalizer_Java = NULL;
120 # ifdef ENABLE_ZAP_DEAD_LOCALS
121 address OptoRuntime::_zap_dead_Java_locals_Java = NULL;
122 address OptoRuntime::_zap_dead_native_locals_Java = NULL;
123 # endif
125 ExceptionBlob* OptoRuntime::_exception_blob;
127 // This should be called in an assertion at the start of OptoRuntime routines
128 // which are entered from compiled code (all of them)
129 #ifndef PRODUCT
130 static bool check_compiled_frame(JavaThread* thread) {
131 assert(thread->last_frame().is_runtime_frame(), "cannot call runtime directly from compiled code");
132 #ifdef ASSERT
133 RegisterMap map(thread, false);
134 frame caller = thread->last_frame().sender(&map);
135 assert(caller.is_compiled_frame(), "not being called from compiled like code");
136 #endif /* ASSERT */
137 return true;
138 }
139 #endif
142 #define gen(env, var, type_func_gen, c_func, fancy_jump, pass_tls, save_arg_regs, return_pc) \
143 var = generate_stub(env, type_func_gen, CAST_FROM_FN_PTR(address, c_func), #var, fancy_jump, pass_tls, save_arg_regs, return_pc)
145 void OptoRuntime::generate(ciEnv* env) {
147 generate_exception_blob();
149 // Note: tls: Means fetching the return oop out of the thread-local storage
150 //
151 // variable/name type-function-gen , runtime method ,fncy_jp, tls,save_args,retpc
152 // -------------------------------------------------------------------------------------------------------------------------------
153 gen(env, _new_instance_Java , new_instance_Type , new_instance_C , 0 , true , false, false);
154 gen(env, _new_array_Java , new_array_Type , new_array_C , 0 , true , false, false);
155 gen(env, _new_array_nozero_Java , new_array_Type , new_array_nozero_C , 0 , true , false, false);
156 gen(env, _multianewarray2_Java , multianewarray2_Type , multianewarray2_C , 0 , true , false, false);
157 gen(env, _multianewarray3_Java , multianewarray3_Type , multianewarray3_C , 0 , true , false, false);
158 gen(env, _multianewarray4_Java , multianewarray4_Type , multianewarray4_C , 0 , true , false, false);
159 gen(env, _multianewarray5_Java , multianewarray5_Type , multianewarray5_C , 0 , true , false, false);
160 gen(env, _multianewarrayN_Java , multianewarrayN_Type , multianewarrayN_C , 0 , true , false, false);
161 gen(env, _g1_wb_pre_Java , g1_wb_pre_Type , SharedRuntime::g1_wb_pre , 0 , false, false, false);
162 gen(env, _g1_wb_post_Java , g1_wb_post_Type , SharedRuntime::g1_wb_post , 0 , false, false, false);
163 gen(env, _complete_monitor_locking_Java , complete_monitor_enter_Type , SharedRuntime::complete_monitor_locking_C , 0 , false, false, false);
164 gen(env, _rethrow_Java , rethrow_Type , rethrow_C , 2 , true , false, true );
166 gen(env, _slow_arraycopy_Java , slow_arraycopy_Type , SharedRuntime::slow_arraycopy_C , 0 , false, false, false);
167 gen(env, _register_finalizer_Java , register_finalizer_Type , register_finalizer , 0 , false, false, false);
169 # ifdef ENABLE_ZAP_DEAD_LOCALS
170 gen(env, _zap_dead_Java_locals_Java , zap_dead_locals_Type , zap_dead_Java_locals_C , 0 , false, true , false );
171 gen(env, _zap_dead_native_locals_Java , zap_dead_locals_Type , zap_dead_native_locals_C , 0 , false, true , false );
172 # endif
174 }
176 #undef gen
179 // Helper method to do generation of RunTimeStub's
180 address OptoRuntime::generate_stub( ciEnv* env,
181 TypeFunc_generator gen, address C_function,
182 const char *name, int is_fancy_jump,
183 bool pass_tls,
184 bool save_argument_registers,
185 bool return_pc ) {
186 ResourceMark rm;
187 Compile C( env, gen, C_function, name, is_fancy_jump, pass_tls, save_argument_registers, return_pc );
188 return C.stub_entry_point();
189 }
191 const char* OptoRuntime::stub_name(address entry) {
192 #ifndef PRODUCT
193 CodeBlob* cb = CodeCache::find_blob(entry);
194 RuntimeStub* rs =(RuntimeStub *)cb;
195 assert(rs != NULL && rs->is_runtime_stub(), "not a runtime stub");
196 return rs->name();
197 #else
198 // Fast implementation for product mode (maybe it should be inlined too)
199 return "runtime stub";
200 #endif
201 }
204 //=============================================================================
205 // Opto compiler runtime routines
206 //=============================================================================
209 //=============================allocation======================================
210 // We failed the fast-path allocation. Now we need to do a scavenge or GC
211 // and try allocation again.
213 void OptoRuntime::new_store_pre_barrier(JavaThread* thread) {
214 // After any safepoint, just before going back to compiled code,
215 // we inform the GC that we will be doing initializing writes to
216 // this object in the future without emitting card-marks, so
217 // GC may take any compensating steps.
218 // NOTE: Keep this code consistent with GraphKit::store_barrier.
220 oop new_obj = thread->vm_result();
221 if (new_obj == NULL) return;
223 assert(Universe::heap()->can_elide_tlab_store_barriers(),
224 "compiler must check this first");
225 // GC may decide to give back a safer copy of new_obj.
226 new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
227 thread->set_vm_result(new_obj);
228 }
230 // object allocation
231 JRT_BLOCK_ENTRY(void, OptoRuntime::new_instance_C(klassOopDesc* klass, JavaThread* thread))
232 JRT_BLOCK;
233 #ifndef PRODUCT
234 SharedRuntime::_new_instance_ctr++; // new instance requires GC
235 #endif
236 assert(check_compiled_frame(thread), "incorrect caller");
238 // These checks are cheap to make and support reflective allocation.
239 int lh = Klass::cast(klass)->layout_helper();
240 if (Klass::layout_helper_needs_slow_path(lh)
241 || !instanceKlass::cast(klass)->is_initialized()) {
242 KlassHandle kh(THREAD, klass);
243 kh->check_valid_for_instantiation(false, THREAD);
244 if (!HAS_PENDING_EXCEPTION) {
245 instanceKlass::cast(kh())->initialize(THREAD);
246 }
247 if (!HAS_PENDING_EXCEPTION) {
248 klass = kh();
249 } else {
250 klass = NULL;
251 }
252 }
254 if (klass != NULL) {
255 // Scavenge and allocate an instance.
256 oop result = instanceKlass::cast(klass)->allocate_instance(THREAD);
257 thread->set_vm_result(result);
259 // Pass oops back through thread local storage. Our apparent type to Java
260 // is that we return an oop, but we can block on exit from this routine and
261 // a GC can trash the oop in C's return register. The generated stub will
262 // fetch the oop from TLS after any possible GC.
263 }
265 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
266 JRT_BLOCK_END;
268 if (GraphKit::use_ReduceInitialCardMarks()) {
269 // inform GC that we won't do card marks for initializing writes.
270 new_store_pre_barrier(thread);
271 }
272 JRT_END
275 // array allocation
276 JRT_BLOCK_ENTRY(void, OptoRuntime::new_array_C(klassOopDesc* array_type, int len, JavaThread *thread))
277 JRT_BLOCK;
278 #ifndef PRODUCT
279 SharedRuntime::_new_array_ctr++; // new array requires GC
280 #endif
281 assert(check_compiled_frame(thread), "incorrect caller");
283 // Scavenge and allocate an instance.
284 oop result;
286 if (Klass::cast(array_type)->oop_is_typeArray()) {
287 // The oopFactory likes to work with the element type.
288 // (We could bypass the oopFactory, since it doesn't add much value.)
289 BasicType elem_type = typeArrayKlass::cast(array_type)->element_type();
290 result = oopFactory::new_typeArray(elem_type, len, THREAD);
291 } else {
292 // Although the oopFactory likes to work with the elem_type,
293 // the compiler prefers the array_type, since it must already have
294 // that latter value in hand for the fast path.
295 klassOopDesc* elem_type = objArrayKlass::cast(array_type)->element_klass();
296 result = oopFactory::new_objArray(elem_type, len, THREAD);
297 }
299 // Pass oops back through thread local storage. Our apparent type to Java
300 // is that we return an oop, but we can block on exit from this routine and
301 // a GC can trash the oop in C's return register. The generated stub will
302 // fetch the oop from TLS after any possible GC.
303 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
304 thread->set_vm_result(result);
305 JRT_BLOCK_END;
307 if (GraphKit::use_ReduceInitialCardMarks()) {
308 // inform GC that we won't do card marks for initializing writes.
309 new_store_pre_barrier(thread);
310 }
311 JRT_END
313 // array allocation without zeroing
314 JRT_BLOCK_ENTRY(void, OptoRuntime::new_array_nozero_C(klassOopDesc* array_type, int len, JavaThread *thread))
315 JRT_BLOCK;
316 #ifndef PRODUCT
317 SharedRuntime::_new_array_ctr++; // new array requires GC
318 #endif
319 assert(check_compiled_frame(thread), "incorrect caller");
321 // Scavenge and allocate an instance.
322 oop result;
324 assert(Klass::cast(array_type)->oop_is_typeArray(), "should be called only for type array");
325 // The oopFactory likes to work with the element type.
326 BasicType elem_type = typeArrayKlass::cast(array_type)->element_type();
327 result = oopFactory::new_typeArray_nozero(elem_type, len, THREAD);
329 // Pass oops back through thread local storage. Our apparent type to Java
330 // is that we return an oop, but we can block on exit from this routine and
331 // a GC can trash the oop in C's return register. The generated stub will
332 // fetch the oop from TLS after any possible GC.
333 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
334 thread->set_vm_result(result);
335 JRT_BLOCK_END;
337 if (GraphKit::use_ReduceInitialCardMarks()) {
338 // inform GC that we won't do card marks for initializing writes.
339 new_store_pre_barrier(thread);
340 }
342 oop result = thread->vm_result();
343 if ((len > 0) && (result != NULL) &&
344 is_deoptimized_caller_frame(thread)) {
345 // Zero array here if the caller is deoptimized.
346 int size = ((typeArrayOop)result)->object_size();
347 BasicType elem_type = typeArrayKlass::cast(array_type)->element_type();
348 const size_t hs = arrayOopDesc::header_size(elem_type);
349 // Align to next 8 bytes to avoid trashing arrays's length.
350 const size_t aligned_hs = align_object_offset(hs);
351 HeapWord* obj = (HeapWord*)result;
352 if (aligned_hs > hs) {
353 Copy::zero_to_words(obj+hs, aligned_hs-hs);
354 }
355 // Optimized zeroing.
356 Copy::fill_to_aligned_words(obj+aligned_hs, size-aligned_hs);
357 }
359 JRT_END
361 // Note: multianewarray for one dimension is handled inline by GraphKit::new_array.
363 // multianewarray for 2 dimensions
364 JRT_ENTRY(void, OptoRuntime::multianewarray2_C(klassOopDesc* elem_type, int len1, int len2, JavaThread *thread))
365 #ifndef PRODUCT
366 SharedRuntime::_multi2_ctr++; // multianewarray for 1 dimension
367 #endif
368 assert(check_compiled_frame(thread), "incorrect caller");
369 assert(oop(elem_type)->is_klass(), "not a class");
370 jint dims[2];
371 dims[0] = len1;
372 dims[1] = len2;
373 oop obj = arrayKlass::cast(elem_type)->multi_allocate(2, dims, THREAD);
374 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
375 thread->set_vm_result(obj);
376 JRT_END
378 // multianewarray for 3 dimensions
379 JRT_ENTRY(void, OptoRuntime::multianewarray3_C(klassOopDesc* elem_type, int len1, int len2, int len3, JavaThread *thread))
380 #ifndef PRODUCT
381 SharedRuntime::_multi3_ctr++; // multianewarray for 1 dimension
382 #endif
383 assert(check_compiled_frame(thread), "incorrect caller");
384 assert(oop(elem_type)->is_klass(), "not a class");
385 jint dims[3];
386 dims[0] = len1;
387 dims[1] = len2;
388 dims[2] = len3;
389 oop obj = arrayKlass::cast(elem_type)->multi_allocate(3, dims, THREAD);
390 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
391 thread->set_vm_result(obj);
392 JRT_END
394 // multianewarray for 4 dimensions
395 JRT_ENTRY(void, OptoRuntime::multianewarray4_C(klassOopDesc* elem_type, int len1, int len2, int len3, int len4, JavaThread *thread))
396 #ifndef PRODUCT
397 SharedRuntime::_multi4_ctr++; // multianewarray for 1 dimension
398 #endif
399 assert(check_compiled_frame(thread), "incorrect caller");
400 assert(oop(elem_type)->is_klass(), "not a class");
401 jint dims[4];
402 dims[0] = len1;
403 dims[1] = len2;
404 dims[2] = len3;
405 dims[3] = len4;
406 oop obj = arrayKlass::cast(elem_type)->multi_allocate(4, dims, THREAD);
407 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
408 thread->set_vm_result(obj);
409 JRT_END
411 // multianewarray for 5 dimensions
412 JRT_ENTRY(void, OptoRuntime::multianewarray5_C(klassOopDesc* elem_type, int len1, int len2, int len3, int len4, int len5, JavaThread *thread))
413 #ifndef PRODUCT
414 SharedRuntime::_multi5_ctr++; // multianewarray for 1 dimension
415 #endif
416 assert(check_compiled_frame(thread), "incorrect caller");
417 assert(oop(elem_type)->is_klass(), "not a class");
418 jint dims[5];
419 dims[0] = len1;
420 dims[1] = len2;
421 dims[2] = len3;
422 dims[3] = len4;
423 dims[4] = len5;
424 oop obj = arrayKlass::cast(elem_type)->multi_allocate(5, dims, THREAD);
425 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
426 thread->set_vm_result(obj);
427 JRT_END
429 JRT_ENTRY(void, OptoRuntime::multianewarrayN_C(klassOopDesc* elem_type, arrayOopDesc* dims, JavaThread *thread))
430 assert(check_compiled_frame(thread), "incorrect caller");
431 assert(oop(elem_type)->is_klass(), "not a class");
432 assert(oop(dims)->is_typeArray(), "not an array");
434 ResourceMark rm;
435 jint len = dims->length();
436 assert(len > 0, "Dimensions array should contain data");
437 jint *j_dims = typeArrayOop(dims)->int_at_addr(0);
438 jint *c_dims = NEW_RESOURCE_ARRAY(jint, len);
439 Copy::conjoint_jints_atomic(j_dims, c_dims, len);
441 oop obj = arrayKlass::cast(elem_type)->multi_allocate(len, c_dims, THREAD);
442 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
443 thread->set_vm_result(obj);
444 JRT_END
447 const TypeFunc *OptoRuntime::new_instance_Type() {
448 // create input type (domain)
449 const Type **fields = TypeTuple::fields(1);
450 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated
451 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
453 // create result type (range)
454 fields = TypeTuple::fields(1);
455 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
457 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
459 return TypeFunc::make(domain, range);
460 }
463 const TypeFunc *OptoRuntime::athrow_Type() {
464 // create input type (domain)
465 const Type **fields = TypeTuple::fields(1);
466 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated
467 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
469 // create result type (range)
470 fields = TypeTuple::fields(0);
472 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
474 return TypeFunc::make(domain, range);
475 }
478 const TypeFunc *OptoRuntime::new_array_Type() {
479 // create input type (domain)
480 const Type **fields = TypeTuple::fields(2);
481 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass
482 fields[TypeFunc::Parms+1] = TypeInt::INT; // array size
483 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
485 // create result type (range)
486 fields = TypeTuple::fields(1);
487 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
489 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
491 return TypeFunc::make(domain, range);
492 }
494 const TypeFunc *OptoRuntime::multianewarray_Type(int ndim) {
495 // create input type (domain)
496 const int nargs = ndim + 1;
497 const Type **fields = TypeTuple::fields(nargs);
498 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass
499 for( int i = 1; i < nargs; i++ )
500 fields[TypeFunc::Parms + i] = TypeInt::INT; // array size
501 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+nargs, fields);
503 // create result type (range)
504 fields = TypeTuple::fields(1);
505 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
506 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
508 return TypeFunc::make(domain, range);
509 }
511 const TypeFunc *OptoRuntime::multianewarray2_Type() {
512 return multianewarray_Type(2);
513 }
515 const TypeFunc *OptoRuntime::multianewarray3_Type() {
516 return multianewarray_Type(3);
517 }
519 const TypeFunc *OptoRuntime::multianewarray4_Type() {
520 return multianewarray_Type(4);
521 }
523 const TypeFunc *OptoRuntime::multianewarray5_Type() {
524 return multianewarray_Type(5);
525 }
527 const TypeFunc *OptoRuntime::multianewarrayN_Type() {
528 // create input type (domain)
529 const Type **fields = TypeTuple::fields(2);
530 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass
531 fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // array of dim sizes
532 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
534 // create result type (range)
535 fields = TypeTuple::fields(1);
536 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
537 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
539 return TypeFunc::make(domain, range);
540 }
542 const TypeFunc *OptoRuntime::g1_wb_pre_Type() {
543 const Type **fields = TypeTuple::fields(2);
544 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // original field value
545 fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // thread
546 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
548 // create result type (range)
549 fields = TypeTuple::fields(0);
550 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
552 return TypeFunc::make(domain, range);
553 }
555 const TypeFunc *OptoRuntime::g1_wb_post_Type() {
557 const Type **fields = TypeTuple::fields(2);
558 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Card addr
559 fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // thread
560 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
562 // create result type (range)
563 fields = TypeTuple::fields(0);
564 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
566 return TypeFunc::make(domain, range);
567 }
569 const TypeFunc *OptoRuntime::uncommon_trap_Type() {
570 // create input type (domain)
571 const Type **fields = TypeTuple::fields(1);
572 // Symbol* name of class to be loaded
573 fields[TypeFunc::Parms+0] = TypeInt::INT;
574 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
576 // create result type (range)
577 fields = TypeTuple::fields(0);
578 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
580 return TypeFunc::make(domain, range);
581 }
583 # ifdef ENABLE_ZAP_DEAD_LOCALS
584 // Type used for stub generation for zap_dead_locals.
585 // No inputs or outputs
586 const TypeFunc *OptoRuntime::zap_dead_locals_Type() {
587 // create input type (domain)
588 const Type **fields = TypeTuple::fields(0);
589 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms,fields);
591 // create result type (range)
592 fields = TypeTuple::fields(0);
593 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms,fields);
595 return TypeFunc::make(domain,range);
596 }
597 # endif
600 //-----------------------------------------------------------------------------
601 // Monitor Handling
602 const TypeFunc *OptoRuntime::complete_monitor_enter_Type() {
603 // create input type (domain)
604 const Type **fields = TypeTuple::fields(2);
605 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked
606 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock
607 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
609 // create result type (range)
610 fields = TypeTuple::fields(0);
612 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
614 return TypeFunc::make(domain,range);
615 }
618 //-----------------------------------------------------------------------------
619 const TypeFunc *OptoRuntime::complete_monitor_exit_Type() {
620 // create input type (domain)
621 const Type **fields = TypeTuple::fields(2);
622 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked
623 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock
624 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
626 // create result type (range)
627 fields = TypeTuple::fields(0);
629 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
631 return TypeFunc::make(domain,range);
632 }
634 const TypeFunc* OptoRuntime::flush_windows_Type() {
635 // create input type (domain)
636 const Type** fields = TypeTuple::fields(1);
637 fields[TypeFunc::Parms+0] = NULL; // void
638 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms, fields);
640 // create result type
641 fields = TypeTuple::fields(1);
642 fields[TypeFunc::Parms+0] = NULL; // void
643 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
645 return TypeFunc::make(domain, range);
646 }
648 const TypeFunc* OptoRuntime::l2f_Type() {
649 // create input type (domain)
650 const Type **fields = TypeTuple::fields(2);
651 fields[TypeFunc::Parms+0] = TypeLong::LONG;
652 fields[TypeFunc::Parms+1] = Type::HALF;
653 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
655 // create result type (range)
656 fields = TypeTuple::fields(1);
657 fields[TypeFunc::Parms+0] = Type::FLOAT;
658 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
660 return TypeFunc::make(domain, range);
661 }
663 const TypeFunc* OptoRuntime::modf_Type() {
664 const Type **fields = TypeTuple::fields(2);
665 fields[TypeFunc::Parms+0] = Type::FLOAT;
666 fields[TypeFunc::Parms+1] = Type::FLOAT;
667 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
669 // create result type (range)
670 fields = TypeTuple::fields(1);
671 fields[TypeFunc::Parms+0] = Type::FLOAT;
673 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
675 return TypeFunc::make(domain, range);
676 }
678 const TypeFunc *OptoRuntime::Math_D_D_Type() {
679 // create input type (domain)
680 const Type **fields = TypeTuple::fields(2);
681 // Symbol* name of class to be loaded
682 fields[TypeFunc::Parms+0] = Type::DOUBLE;
683 fields[TypeFunc::Parms+1] = Type::HALF;
684 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
686 // create result type (range)
687 fields = TypeTuple::fields(2);
688 fields[TypeFunc::Parms+0] = Type::DOUBLE;
689 fields[TypeFunc::Parms+1] = Type::HALF;
690 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
692 return TypeFunc::make(domain, range);
693 }
695 const TypeFunc* OptoRuntime::Math_DD_D_Type() {
696 const Type **fields = TypeTuple::fields(4);
697 fields[TypeFunc::Parms+0] = Type::DOUBLE;
698 fields[TypeFunc::Parms+1] = Type::HALF;
699 fields[TypeFunc::Parms+2] = Type::DOUBLE;
700 fields[TypeFunc::Parms+3] = Type::HALF;
701 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+4, fields);
703 // create result type (range)
704 fields = TypeTuple::fields(2);
705 fields[TypeFunc::Parms+0] = Type::DOUBLE;
706 fields[TypeFunc::Parms+1] = Type::HALF;
707 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
709 return TypeFunc::make(domain, range);
710 }
712 //-------------- currentTimeMillis, currentTimeNanos, etc
714 const TypeFunc* OptoRuntime::void_long_Type() {
715 // create input type (domain)
716 const Type **fields = TypeTuple::fields(0);
717 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+0, fields);
719 // create result type (range)
720 fields = TypeTuple::fields(2);
721 fields[TypeFunc::Parms+0] = TypeLong::LONG;
722 fields[TypeFunc::Parms+1] = Type::HALF;
723 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
725 return TypeFunc::make(domain, range);
726 }
728 // arraycopy stub variations:
729 enum ArrayCopyType {
730 ac_fast, // void(ptr, ptr, size_t)
731 ac_checkcast, // int(ptr, ptr, size_t, size_t, ptr)
732 ac_slow, // void(ptr, int, ptr, int, int)
733 ac_generic // int(ptr, int, ptr, int, int)
734 };
736 static const TypeFunc* make_arraycopy_Type(ArrayCopyType act) {
737 // create input type (domain)
738 int num_args = (act == ac_fast ? 3 : 5);
739 int num_size_args = (act == ac_fast ? 1 : act == ac_checkcast ? 2 : 0);
740 int argcnt = num_args;
741 LP64_ONLY(argcnt += num_size_args); // halfwords for lengths
742 const Type** fields = TypeTuple::fields(argcnt);
743 int argp = TypeFunc::Parms;
744 fields[argp++] = TypePtr::NOTNULL; // src
745 if (num_size_args == 0) {
746 fields[argp++] = TypeInt::INT; // src_pos
747 }
748 fields[argp++] = TypePtr::NOTNULL; // dest
749 if (num_size_args == 0) {
750 fields[argp++] = TypeInt::INT; // dest_pos
751 fields[argp++] = TypeInt::INT; // length
752 }
753 while (num_size_args-- > 0) {
754 fields[argp++] = TypeX_X; // size in whatevers (size_t)
755 LP64_ONLY(fields[argp++] = Type::HALF); // other half of long length
756 }
757 if (act == ac_checkcast) {
758 fields[argp++] = TypePtr::NOTNULL; // super_klass
759 }
760 assert(argp == TypeFunc::Parms+argcnt, "correct decoding of act");
761 const TypeTuple* domain = TypeTuple::make(TypeFunc::Parms+argcnt, fields);
763 // create result type if needed
764 int retcnt = (act == ac_checkcast || act == ac_generic ? 1 : 0);
765 fields = TypeTuple::fields(1);
766 if (retcnt == 0)
767 fields[TypeFunc::Parms+0] = NULL; // void
768 else
769 fields[TypeFunc::Parms+0] = TypeInt::INT; // status result, if needed
770 const TypeTuple* range = TypeTuple::make(TypeFunc::Parms+retcnt, fields);
771 return TypeFunc::make(domain, range);
772 }
774 const TypeFunc* OptoRuntime::fast_arraycopy_Type() {
775 // This signature is simple: Two base pointers and a size_t.
776 return make_arraycopy_Type(ac_fast);
777 }
779 const TypeFunc* OptoRuntime::checkcast_arraycopy_Type() {
780 // An extension of fast_arraycopy_Type which adds type checking.
781 return make_arraycopy_Type(ac_checkcast);
782 }
784 const TypeFunc* OptoRuntime::slow_arraycopy_Type() {
785 // This signature is exactly the same as System.arraycopy.
786 // There are no intptr_t (int/long) arguments.
787 return make_arraycopy_Type(ac_slow);
788 }
790 const TypeFunc* OptoRuntime::generic_arraycopy_Type() {
791 // This signature is like System.arraycopy, except that it returns status.
792 return make_arraycopy_Type(ac_generic);
793 }
796 const TypeFunc* OptoRuntime::array_fill_Type() {
797 // create input type (domain): pointer, int, size_t
798 const Type** fields = TypeTuple::fields(3 LP64_ONLY( + 1));
799 int argp = TypeFunc::Parms;
800 fields[argp++] = TypePtr::NOTNULL;
801 fields[argp++] = TypeInt::INT;
802 fields[argp++] = TypeX_X; // size in whatevers (size_t)
803 LP64_ONLY(fields[argp++] = Type::HALF); // other half of long length
804 const TypeTuple *domain = TypeTuple::make(argp, fields);
806 // create result type
807 fields = TypeTuple::fields(1);
808 fields[TypeFunc::Parms+0] = NULL; // void
809 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
811 return TypeFunc::make(domain, range);
812 }
814 //------------- Interpreter state access for on stack replacement
815 const TypeFunc* OptoRuntime::osr_end_Type() {
816 // create input type (domain)
817 const Type **fields = TypeTuple::fields(1);
818 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // OSR temp buf
819 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
821 // create result type
822 fields = TypeTuple::fields(1);
823 // fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // locked oop
824 fields[TypeFunc::Parms+0] = NULL; // void
825 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
826 return TypeFunc::make(domain, range);
827 }
829 //-------------- methodData update helpers
831 const TypeFunc* OptoRuntime::profile_receiver_type_Type() {
832 // create input type (domain)
833 const Type **fields = TypeTuple::fields(2);
834 fields[TypeFunc::Parms+0] = TypeAryPtr::NOTNULL; // methodData pointer
835 fields[TypeFunc::Parms+1] = TypeInstPtr::BOTTOM; // receiver oop
836 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
838 // create result type
839 fields = TypeTuple::fields(1);
840 fields[TypeFunc::Parms+0] = NULL; // void
841 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
842 return TypeFunc::make(domain,range);
843 }
845 JRT_LEAF(void, OptoRuntime::profile_receiver_type_C(DataLayout* data, oopDesc* receiver))
846 if (receiver == NULL) return;
847 klassOop receiver_klass = receiver->klass();
849 intptr_t* mdp = ((intptr_t*)(data)) + DataLayout::header_size_in_cells();
850 int empty_row = -1; // free row, if any is encountered
852 // ReceiverTypeData* vc = new ReceiverTypeData(mdp);
853 for (uint row = 0; row < ReceiverTypeData::row_limit(); row++) {
854 // if (vc->receiver(row) == receiver_klass)
855 int receiver_off = ReceiverTypeData::receiver_cell_index(row);
856 intptr_t row_recv = *(mdp + receiver_off);
857 if (row_recv == (intptr_t) receiver_klass) {
858 // vc->set_receiver_count(row, vc->receiver_count(row) + DataLayout::counter_increment);
859 int count_off = ReceiverTypeData::receiver_count_cell_index(row);
860 *(mdp + count_off) += DataLayout::counter_increment;
861 return;
862 } else if (row_recv == 0) {
863 // else if (vc->receiver(row) == NULL)
864 empty_row = (int) row;
865 }
866 }
868 if (empty_row != -1) {
869 int receiver_off = ReceiverTypeData::receiver_cell_index(empty_row);
870 // vc->set_receiver(empty_row, receiver_klass);
871 *(mdp + receiver_off) = (intptr_t) receiver_klass;
872 // vc->set_receiver_count(empty_row, DataLayout::counter_increment);
873 int count_off = ReceiverTypeData::receiver_count_cell_index(empty_row);
874 *(mdp + count_off) = DataLayout::counter_increment;
875 } else {
876 // Receiver did not match any saved receiver and there is no empty row for it.
877 // Increment total counter to indicate polymorphic case.
878 intptr_t* count_p = (intptr_t*)(((byte*)(data)) + in_bytes(CounterData::count_offset()));
879 *count_p += DataLayout::counter_increment;
880 }
881 JRT_END
883 //-----------------------------------------------------------------------------
884 // implicit exception support.
886 static void report_null_exception_in_code_cache(address exception_pc) {
887 ResourceMark rm;
888 CodeBlob* n = CodeCache::find_blob(exception_pc);
889 if (n != NULL) {
890 tty->print_cr("#");
891 tty->print_cr("# HotSpot Runtime Error, null exception in generated code");
892 tty->print_cr("#");
893 tty->print_cr("# pc where exception happened = " INTPTR_FORMAT, exception_pc);
895 if (n->is_nmethod()) {
896 methodOop method = ((nmethod*)n)->method();
897 tty->print_cr("# Method where it happened %s.%s ", Klass::cast(method->method_holder())->name()->as_C_string(), method->name()->as_C_string());
898 tty->print_cr("#");
899 if (ShowMessageBoxOnError && UpdateHotSpotCompilerFileOnError) {
900 const char* title = "HotSpot Runtime Error";
901 const char* question = "Do you want to exclude compilation of this method in future runs?";
902 if (os::message_box(title, question)) {
903 CompilerOracle::append_comment_to_file("");
904 CompilerOracle::append_comment_to_file("Null exception in compiled code resulted in the following exclude");
905 CompilerOracle::append_comment_to_file("");
906 CompilerOracle::append_exclude_to_file(method);
907 tty->print_cr("#");
908 tty->print_cr("# %s has been updated to exclude the specified method", CompileCommandFile);
909 tty->print_cr("#");
910 }
911 }
912 fatal("Implicit null exception happened in compiled method");
913 } else {
914 n->print();
915 fatal("Implicit null exception happened in generated stub");
916 }
917 }
918 fatal("Implicit null exception at wrong place");
919 }
922 //-------------------------------------------------------------------------------------
923 // register policy
925 bool OptoRuntime::is_callee_saved_register(MachRegisterNumbers reg) {
926 assert(reg >= 0 && reg < _last_Mach_Reg, "must be a machine register");
927 switch (register_save_policy[reg]) {
928 case 'C': return false; //SOC
929 case 'E': return true ; //SOE
930 case 'N': return false; //NS
931 case 'A': return false; //AS
932 }
933 ShouldNotReachHere();
934 return false;
935 }
937 //-----------------------------------------------------------------------
938 // Exceptions
939 //
941 static void trace_exception(oop exception_oop, address exception_pc, const char* msg) PRODUCT_RETURN;
943 // The method is an entry that is always called by a C++ method not
944 // directly from compiled code. Compiled code will call the C++ method following.
945 // We can't allow async exception to be installed during exception processing.
946 JRT_ENTRY_NO_ASYNC(address, OptoRuntime::handle_exception_C_helper(JavaThread* thread, nmethod* &nm))
948 // Do not confuse exception_oop with pending_exception. The exception_oop
949 // is only used to pass arguments into the method. Not for general
950 // exception handling. DO NOT CHANGE IT to use pending_exception, since
951 // the runtime stubs checks this on exit.
952 assert(thread->exception_oop() != NULL, "exception oop is found");
953 address handler_address = NULL;
955 Handle exception(thread, thread->exception_oop());
957 if (TraceExceptions) {
958 trace_exception(exception(), thread->exception_pc(), "");
959 }
960 // for AbortVMOnException flag
961 NOT_PRODUCT(Exceptions::debug_check_abort(exception));
963 #ifdef ASSERT
964 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
965 // should throw an exception here
966 ShouldNotReachHere();
967 }
968 #endif
971 // new exception handling: this method is entered only from adapters
972 // exceptions from compiled java methods are handled in compiled code
973 // using rethrow node
975 address pc = thread->exception_pc();
976 nm = CodeCache::find_nmethod(pc);
977 assert(nm != NULL, "No NMethod found");
978 if (nm->is_native_method()) {
979 fatal("Native mathod should not have path to exception handling");
980 } else {
981 // we are switching to old paradigm: search for exception handler in caller_frame
982 // instead in exception handler of caller_frame.sender()
984 if (JvmtiExport::can_post_on_exceptions()) {
985 // "Full-speed catching" is not necessary here,
986 // since we're notifying the VM on every catch.
987 // Force deoptimization and the rest of the lookup
988 // will be fine.
989 deoptimize_caller_frame(thread, true);
990 }
992 // Check the stack guard pages. If enabled, look for handler in this frame;
993 // otherwise, forcibly unwind the frame.
994 //
995 // 4826555: use default current sp for reguard_stack instead of &nm: it's more accurate.
996 bool force_unwind = !thread->reguard_stack();
997 bool deopting = false;
998 if (nm->is_deopt_pc(pc)) {
999 deopting = true;
1000 RegisterMap map(thread, false);
1001 frame deoptee = thread->last_frame().sender(&map);
1002 assert(deoptee.is_deoptimized_frame(), "must be deopted");
1003 // Adjust the pc back to the original throwing pc
1004 pc = deoptee.pc();
1005 }
1007 // If we are forcing an unwind because of stack overflow then deopt is
1008 // irrelevant sice we are throwing the frame away anyway.
1010 if (deopting && !force_unwind) {
1011 handler_address = SharedRuntime::deopt_blob()->unpack_with_exception();
1012 } else {
1014 handler_address =
1015 force_unwind ? NULL : nm->handler_for_exception_and_pc(exception, pc);
1017 if (handler_address == NULL) {
1018 Handle original_exception(thread, exception());
1019 handler_address = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true);
1020 assert (handler_address != NULL, "must have compiled handler");
1021 // Update the exception cache only when the unwind was not forced
1022 // and there didn't happen another exception during the computation of the
1023 // compiled exception handler.
1024 if (!force_unwind && original_exception() == exception()) {
1025 nm->add_handler_for_exception_and_pc(exception,pc,handler_address);
1026 }
1027 } else {
1028 assert(handler_address == SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true), "Must be the same");
1029 }
1030 }
1032 thread->set_exception_pc(pc);
1033 thread->set_exception_handler_pc(handler_address);
1035 // Check if the exception PC is a MethodHandle call site.
1036 thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
1037 }
1039 // Restore correct return pc. Was saved above.
1040 thread->set_exception_oop(exception());
1041 return handler_address;
1043 JRT_END
1045 // We are entering here from exception_blob
1046 // If there is a compiled exception handler in this method, we will continue there;
1047 // otherwise we will unwind the stack and continue at the caller of top frame method
1048 // Note we enter without the usual JRT wrapper. We will call a helper routine that
1049 // will do the normal VM entry. We do it this way so that we can see if the nmethod
1050 // we looked up the handler for has been deoptimized in the meantime. If it has been
1051 // we must not use the handler and instread return the deopt blob.
1052 address OptoRuntime::handle_exception_C(JavaThread* thread) {
1053 //
1054 // We are in Java not VM and in debug mode we have a NoHandleMark
1055 //
1056 #ifndef PRODUCT
1057 SharedRuntime::_find_handler_ctr++; // find exception handler
1058 #endif
1059 debug_only(NoHandleMark __hm;)
1060 nmethod* nm = NULL;
1061 address handler_address = NULL;
1062 {
1063 // Enter the VM
1065 ResetNoHandleMark rnhm;
1066 handler_address = handle_exception_C_helper(thread, nm);
1067 }
1069 // Back in java: Use no oops, DON'T safepoint
1071 // Now check to see if the handler we are returning is in a now
1072 // deoptimized frame
1074 if (nm != NULL) {
1075 RegisterMap map(thread, false);
1076 frame caller = thread->last_frame().sender(&map);
1077 #ifdef ASSERT
1078 assert(caller.is_compiled_frame(), "must be");
1079 #endif // ASSERT
1080 if (caller.is_deoptimized_frame()) {
1081 handler_address = SharedRuntime::deopt_blob()->unpack_with_exception();
1082 }
1083 }
1084 return handler_address;
1085 }
1087 //------------------------------rethrow----------------------------------------
1088 // We get here after compiled code has executed a 'RethrowNode'. The callee
1089 // is either throwing or rethrowing an exception. The callee-save registers
1090 // have been restored, synchronized objects have been unlocked and the callee
1091 // stack frame has been removed. The return address was passed in.
1092 // Exception oop is passed as the 1st argument. This routine is then called
1093 // from the stub. On exit, we know where to jump in the caller's code.
1094 // After this C code exits, the stub will pop his frame and end in a jump
1095 // (instead of a return). We enter the caller's default handler.
1096 //
1097 // This must be JRT_LEAF:
1098 // - caller will not change its state as we cannot block on exit,
1099 // therefore raw_exception_handler_for_return_address is all it takes
1100 // to handle deoptimized blobs
1101 //
1102 // However, there needs to be a safepoint check in the middle! So compiled
1103 // safepoints are completely watertight.
1104 //
1105 // Thus, it cannot be a leaf since it contains the No_GC_Verifier.
1106 //
1107 // *THIS IS NOT RECOMMENDED PROGRAMMING STYLE*
1108 //
1109 address OptoRuntime::rethrow_C(oopDesc* exception, JavaThread* thread, address ret_pc) {
1110 #ifndef PRODUCT
1111 SharedRuntime::_rethrow_ctr++; // count rethrows
1112 #endif
1113 assert (exception != NULL, "should have thrown a NULLPointerException");
1114 #ifdef ASSERT
1115 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
1116 // should throw an exception here
1117 ShouldNotReachHere();
1118 }
1119 #endif
1121 thread->set_vm_result(exception);
1122 // Frame not compiled (handles deoptimization blob)
1123 return SharedRuntime::raw_exception_handler_for_return_address(thread, ret_pc);
1124 }
1127 const TypeFunc *OptoRuntime::rethrow_Type() {
1128 // create input type (domain)
1129 const Type **fields = TypeTuple::fields(1);
1130 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop
1131 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields);
1133 // create result type (range)
1134 fields = TypeTuple::fields(1);
1135 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop
1136 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
1138 return TypeFunc::make(domain, range);
1139 }
1142 void OptoRuntime::deoptimize_caller_frame(JavaThread *thread, bool doit) {
1143 // Deoptimize frame
1144 if (doit) {
1145 // Called from within the owner thread, so no need for safepoint
1146 RegisterMap reg_map(thread);
1147 frame stub_frame = thread->last_frame();
1148 assert(stub_frame.is_runtime_frame() || exception_blob()->contains(stub_frame.pc()), "sanity check");
1149 frame caller_frame = stub_frame.sender(®_map);
1151 // Deoptimize the caller frame.
1152 Deoptimization::deoptimize_frame(thread, caller_frame.id());
1153 }
1154 }
1157 bool OptoRuntime::is_deoptimized_caller_frame(JavaThread *thread) {
1158 // Called from within the owner thread, so no need for safepoint
1159 RegisterMap reg_map(thread);
1160 frame stub_frame = thread->last_frame();
1161 assert(stub_frame.is_runtime_frame() || exception_blob()->contains(stub_frame.pc()), "sanity check");
1162 frame caller_frame = stub_frame.sender(®_map);
1163 return caller_frame.is_deoptimized_frame();
1164 }
1167 const TypeFunc *OptoRuntime::register_finalizer_Type() {
1168 // create input type (domain)
1169 const Type **fields = TypeTuple::fields(1);
1170 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // oop; Receiver
1171 // // The JavaThread* is passed to each routine as the last argument
1172 // fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // JavaThread *; Executing thread
1173 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields);
1175 // create result type (range)
1176 fields = TypeTuple::fields(0);
1178 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
1180 return TypeFunc::make(domain,range);
1181 }
1184 //-----------------------------------------------------------------------------
1185 // Dtrace support. entry and exit probes have the same signature
1186 const TypeFunc *OptoRuntime::dtrace_method_entry_exit_Type() {
1187 // create input type (domain)
1188 const Type **fields = TypeTuple::fields(2);
1189 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage
1190 fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // methodOop; Method we are entering
1191 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
1193 // create result type (range)
1194 fields = TypeTuple::fields(0);
1196 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
1198 return TypeFunc::make(domain,range);
1199 }
1201 const TypeFunc *OptoRuntime::dtrace_object_alloc_Type() {
1202 // create input type (domain)
1203 const Type **fields = TypeTuple::fields(2);
1204 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage
1205 fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // oop; newly allocated object
1207 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
1209 // create result type (range)
1210 fields = TypeTuple::fields(0);
1212 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
1214 return TypeFunc::make(domain,range);
1215 }
1218 JRT_ENTRY_NO_ASYNC(void, OptoRuntime::register_finalizer(oopDesc* obj, JavaThread* thread))
1219 assert(obj->is_oop(), "must be a valid oop");
1220 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise");
1221 instanceKlass::register_finalizer(instanceOop(obj), CHECK);
1222 JRT_END
1224 //-----------------------------------------------------------------------------
1226 NamedCounter * volatile OptoRuntime::_named_counters = NULL;
1228 //
1229 // dump the collected NamedCounters.
1230 //
1231 void OptoRuntime::print_named_counters() {
1232 int total_lock_count = 0;
1233 int eliminated_lock_count = 0;
1235 NamedCounter* c = _named_counters;
1236 while (c) {
1237 if (c->tag() == NamedCounter::LockCounter || c->tag() == NamedCounter::EliminatedLockCounter) {
1238 int count = c->count();
1239 if (count > 0) {
1240 bool eliminated = c->tag() == NamedCounter::EliminatedLockCounter;
1241 if (Verbose) {
1242 tty->print_cr("%d %s%s", count, c->name(), eliminated ? " (eliminated)" : "");
1243 }
1244 total_lock_count += count;
1245 if (eliminated) {
1246 eliminated_lock_count += count;
1247 }
1248 }
1249 } else if (c->tag() == NamedCounter::BiasedLockingCounter) {
1250 BiasedLockingCounters* blc = ((BiasedLockingNamedCounter*)c)->counters();
1251 if (blc->nonzero()) {
1252 tty->print_cr("%s", c->name());
1253 blc->print_on(tty);
1254 }
1255 }
1256 c = c->next();
1257 }
1258 if (total_lock_count > 0) {
1259 tty->print_cr("dynamic locks: %d", total_lock_count);
1260 if (eliminated_lock_count) {
1261 tty->print_cr("eliminated locks: %d (%d%%)", eliminated_lock_count,
1262 (int)(eliminated_lock_count * 100.0 / total_lock_count));
1263 }
1264 }
1265 }
1267 //
1268 // Allocate a new NamedCounter. The JVMState is used to generate the
1269 // name which consists of method@line for the inlining tree.
1270 //
1272 NamedCounter* OptoRuntime::new_named_counter(JVMState* youngest_jvms, NamedCounter::CounterTag tag) {
1273 int max_depth = youngest_jvms->depth();
1275 // Visit scopes from youngest to oldest.
1276 bool first = true;
1277 stringStream st;
1278 for (int depth = max_depth; depth >= 1; depth--) {
1279 JVMState* jvms = youngest_jvms->of_depth(depth);
1280 ciMethod* m = jvms->has_method() ? jvms->method() : NULL;
1281 if (!first) {
1282 st.print(" ");
1283 } else {
1284 first = false;
1285 }
1286 int bci = jvms->bci();
1287 if (bci < 0) bci = 0;
1288 st.print("%s.%s@%d", m->holder()->name()->as_utf8(), m->name()->as_utf8(), bci);
1289 // To print linenumbers instead of bci use: m->line_number_from_bci(bci)
1290 }
1291 NamedCounter* c;
1292 if (tag == NamedCounter::BiasedLockingCounter) {
1293 c = new BiasedLockingNamedCounter(strdup(st.as_string()));
1294 } else {
1295 c = new NamedCounter(strdup(st.as_string()), tag);
1296 }
1298 // atomically add the new counter to the head of the list. We only
1299 // add counters so this is safe.
1300 NamedCounter* head;
1301 do {
1302 head = _named_counters;
1303 c->set_next(head);
1304 } while (Atomic::cmpxchg_ptr(c, &_named_counters, head) != head);
1305 return c;
1306 }
1308 //-----------------------------------------------------------------------------
1309 // Non-product code
1310 #ifndef PRODUCT
1312 int trace_exception_counter = 0;
1313 static void trace_exception(oop exception_oop, address exception_pc, const char* msg) {
1314 ttyLocker ttyl;
1315 trace_exception_counter++;
1316 tty->print("%d [Exception (%s): ", trace_exception_counter, msg);
1317 exception_oop->print_value();
1318 tty->print(" in ");
1319 CodeBlob* blob = CodeCache::find_blob(exception_pc);
1320 if (blob->is_nmethod()) {
1321 ((nmethod*)blob)->method()->print_value();
1322 } else if (blob->is_runtime_stub()) {
1323 tty->print("<runtime-stub>");
1324 } else {
1325 tty->print("<unknown>");
1326 }
1327 tty->print(" at " INTPTR_FORMAT, exception_pc);
1328 tty->print_cr("]");
1329 }
1331 #endif // PRODUCT
1334 # ifdef ENABLE_ZAP_DEAD_LOCALS
1335 // Called from call sites in compiled code with oop maps (actually safepoints)
1336 // Zaps dead locals in first java frame.
1337 // Is entry because may need to lock to generate oop maps
1338 // Currently, only used for compiler frames, but someday may be used
1339 // for interpreter frames, too.
1341 int OptoRuntime::ZapDeadCompiledLocals_count = 0;
1343 // avoid pointers to member funcs with these helpers
1344 static bool is_java_frame( frame* f) { return f->is_java_frame(); }
1345 static bool is_native_frame(frame* f) { return f->is_native_frame(); }
1348 void OptoRuntime::zap_dead_java_or_native_locals(JavaThread* thread,
1349 bool (*is_this_the_right_frame_to_zap)(frame*)) {
1350 assert(JavaThread::current() == thread, "is this needed?");
1352 if ( !ZapDeadCompiledLocals ) return;
1354 bool skip = false;
1356 if ( ZapDeadCompiledLocalsFirst == 0 ) ; // nothing special
1357 else if ( ZapDeadCompiledLocalsFirst > ZapDeadCompiledLocals_count ) skip = true;
1358 else if ( ZapDeadCompiledLocalsFirst == ZapDeadCompiledLocals_count )
1359 warning("starting zapping after skipping");
1361 if ( ZapDeadCompiledLocalsLast == -1 ) ; // nothing special
1362 else if ( ZapDeadCompiledLocalsLast < ZapDeadCompiledLocals_count ) skip = true;
1363 else if ( ZapDeadCompiledLocalsLast == ZapDeadCompiledLocals_count )
1364 warning("about to zap last zap");
1366 ++ZapDeadCompiledLocals_count; // counts skipped zaps, too
1368 if ( skip ) return;
1370 // find java frame and zap it
1372 for (StackFrameStream sfs(thread); !sfs.is_done(); sfs.next()) {
1373 if (is_this_the_right_frame_to_zap(sfs.current()) ) {
1374 sfs.current()->zap_dead_locals(thread, sfs.register_map());
1375 return;
1376 }
1377 }
1378 warning("no frame found to zap in zap_dead_Java_locals_C");
1379 }
1381 JRT_LEAF(void, OptoRuntime::zap_dead_Java_locals_C(JavaThread* thread))
1382 zap_dead_java_or_native_locals(thread, is_java_frame);
1383 JRT_END
1385 // The following does not work because for one thing, the
1386 // thread state is wrong; it expects java, but it is native.
1387 // Also, the invariants in a native stub are different and
1388 // I'm not sure it is safe to have a MachCalRuntimeDirectNode
1389 // in there.
1390 // So for now, we do not zap in native stubs.
1392 JRT_LEAF(void, OptoRuntime::zap_dead_native_locals_C(JavaThread* thread))
1393 zap_dead_java_or_native_locals(thread, is_native_frame);
1394 JRT_END
1396 # endif