Wed, 28 Aug 2013 11:22:43 +0200
8023597: Optimize G1 barriers code for unsafe load_store
Summary: Avoid loading old values in G1 pre-barriers for inlined unsafe load_store nodes.
Reviewed-by: kvn, tonyp
Contributed-by: Martin Doerr <martin.doerr@sap.com>
1 /*
2 * Copyright (c) 1998, 2013, 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 #ifdef ASSERT
130 static bool check_compiled_frame(JavaThread* thread) {
131 assert(thread->last_frame().is_runtime_frame(), "cannot call runtime directly from compiled code");
132 RegisterMap map(thread, false);
133 frame caller = thread->last_frame().sender(&map);
134 assert(caller.is_compiled_frame(), "not being called from compiled like code");
135 return true;
136 }
137 #endif // ASSERT
140 #define gen(env, var, type_func_gen, c_func, fancy_jump, pass_tls, save_arg_regs, return_pc) \
141 var = generate_stub(env, type_func_gen, CAST_FROM_FN_PTR(address, c_func), #var, fancy_jump, pass_tls, save_arg_regs, return_pc)
143 void OptoRuntime::generate(ciEnv* env) {
145 generate_exception_blob();
147 // Note: tls: Means fetching the return oop out of the thread-local storage
148 //
149 // variable/name type-function-gen , runtime method ,fncy_jp, tls,save_args,retpc
150 // -------------------------------------------------------------------------------------------------------------------------------
151 gen(env, _new_instance_Java , new_instance_Type , new_instance_C , 0 , true , false, false);
152 gen(env, _new_array_Java , new_array_Type , new_array_C , 0 , true , false, false);
153 gen(env, _new_array_nozero_Java , new_array_Type , new_array_nozero_C , 0 , true , false, false);
154 gen(env, _multianewarray2_Java , multianewarray2_Type , multianewarray2_C , 0 , true , false, false);
155 gen(env, _multianewarray3_Java , multianewarray3_Type , multianewarray3_C , 0 , true , false, false);
156 gen(env, _multianewarray4_Java , multianewarray4_Type , multianewarray4_C , 0 , true , false, false);
157 gen(env, _multianewarray5_Java , multianewarray5_Type , multianewarray5_C , 0 , true , false, false);
158 gen(env, _multianewarrayN_Java , multianewarrayN_Type , multianewarrayN_C , 0 , true , false, false);
159 gen(env, _g1_wb_pre_Java , g1_wb_pre_Type , SharedRuntime::g1_wb_pre , 0 , false, false, false);
160 gen(env, _g1_wb_post_Java , g1_wb_post_Type , SharedRuntime::g1_wb_post , 0 , false, false, false);
161 gen(env, _complete_monitor_locking_Java , complete_monitor_enter_Type , SharedRuntime::complete_monitor_locking_C , 0 , false, false, false);
162 gen(env, _rethrow_Java , rethrow_Type , rethrow_C , 2 , true , false, true );
164 gen(env, _slow_arraycopy_Java , slow_arraycopy_Type , SharedRuntime::slow_arraycopy_C , 0 , false, false, false);
165 gen(env, _register_finalizer_Java , register_finalizer_Type , register_finalizer , 0 , false, false, false);
167 # ifdef ENABLE_ZAP_DEAD_LOCALS
168 gen(env, _zap_dead_Java_locals_Java , zap_dead_locals_Type , zap_dead_Java_locals_C , 0 , false, true , false );
169 gen(env, _zap_dead_native_locals_Java , zap_dead_locals_Type , zap_dead_native_locals_C , 0 , false, true , false );
170 # endif
172 }
174 #undef gen
177 // Helper method to do generation of RunTimeStub's
178 address OptoRuntime::generate_stub( ciEnv* env,
179 TypeFunc_generator gen, address C_function,
180 const char *name, int is_fancy_jump,
181 bool pass_tls,
182 bool save_argument_registers,
183 bool return_pc ) {
184 ResourceMark rm;
185 Compile C( env, gen, C_function, name, is_fancy_jump, pass_tls, save_argument_registers, return_pc );
186 return C.stub_entry_point();
187 }
189 const char* OptoRuntime::stub_name(address entry) {
190 #ifndef PRODUCT
191 CodeBlob* cb = CodeCache::find_blob(entry);
192 RuntimeStub* rs =(RuntimeStub *)cb;
193 assert(rs != NULL && rs->is_runtime_stub(), "not a runtime stub");
194 return rs->name();
195 #else
196 // Fast implementation for product mode (maybe it should be inlined too)
197 return "runtime stub";
198 #endif
199 }
202 //=============================================================================
203 // Opto compiler runtime routines
204 //=============================================================================
207 //=============================allocation======================================
208 // We failed the fast-path allocation. Now we need to do a scavenge or GC
209 // and try allocation again.
211 void OptoRuntime::new_store_pre_barrier(JavaThread* thread) {
212 // After any safepoint, just before going back to compiled code,
213 // we inform the GC that we will be doing initializing writes to
214 // this object in the future without emitting card-marks, so
215 // GC may take any compensating steps.
216 // NOTE: Keep this code consistent with GraphKit::store_barrier.
218 oop new_obj = thread->vm_result();
219 if (new_obj == NULL) return;
221 assert(Universe::heap()->can_elide_tlab_store_barriers(),
222 "compiler must check this first");
223 // GC may decide to give back a safer copy of new_obj.
224 new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
225 thread->set_vm_result(new_obj);
226 }
228 // object allocation
229 JRT_BLOCK_ENTRY(void, OptoRuntime::new_instance_C(Klass* klass, JavaThread* thread))
230 JRT_BLOCK;
231 #ifndef PRODUCT
232 SharedRuntime::_new_instance_ctr++; // new instance requires GC
233 #endif
234 assert(check_compiled_frame(thread), "incorrect caller");
236 // These checks are cheap to make and support reflective allocation.
237 int lh = klass->layout_helper();
238 if (Klass::layout_helper_needs_slow_path(lh)
239 || !InstanceKlass::cast(klass)->is_initialized()) {
240 KlassHandle kh(THREAD, klass);
241 kh->check_valid_for_instantiation(false, THREAD);
242 if (!HAS_PENDING_EXCEPTION) {
243 InstanceKlass::cast(kh())->initialize(THREAD);
244 }
245 if (!HAS_PENDING_EXCEPTION) {
246 klass = kh();
247 } else {
248 klass = NULL;
249 }
250 }
252 if (klass != NULL) {
253 // Scavenge and allocate an instance.
254 oop result = InstanceKlass::cast(klass)->allocate_instance(THREAD);
255 thread->set_vm_result(result);
257 // Pass oops back through thread local storage. Our apparent type to Java
258 // is that we return an oop, but we can block on exit from this routine and
259 // a GC can trash the oop in C's return register. The generated stub will
260 // fetch the oop from TLS after any possible GC.
261 }
263 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
264 JRT_BLOCK_END;
266 if (GraphKit::use_ReduceInitialCardMarks()) {
267 // inform GC that we won't do card marks for initializing writes.
268 new_store_pre_barrier(thread);
269 }
270 JRT_END
273 // array allocation
274 JRT_BLOCK_ENTRY(void, OptoRuntime::new_array_C(Klass* array_type, int len, JavaThread *thread))
275 JRT_BLOCK;
276 #ifndef PRODUCT
277 SharedRuntime::_new_array_ctr++; // new array requires GC
278 #endif
279 assert(check_compiled_frame(thread), "incorrect caller");
281 // Scavenge and allocate an instance.
282 oop result;
284 if (array_type->oop_is_typeArray()) {
285 // The oopFactory likes to work with the element type.
286 // (We could bypass the oopFactory, since it doesn't add much value.)
287 BasicType elem_type = TypeArrayKlass::cast(array_type)->element_type();
288 result = oopFactory::new_typeArray(elem_type, len, THREAD);
289 } else {
290 // Although the oopFactory likes to work with the elem_type,
291 // the compiler prefers the array_type, since it must already have
292 // that latter value in hand for the fast path.
293 Klass* elem_type = ObjArrayKlass::cast(array_type)->element_klass();
294 result = oopFactory::new_objArray(elem_type, len, THREAD);
295 }
297 // Pass oops back through thread local storage. Our apparent type to Java
298 // is that we return an oop, but we can block on exit from this routine and
299 // a GC can trash the oop in C's return register. The generated stub will
300 // fetch the oop from TLS after any possible GC.
301 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
302 thread->set_vm_result(result);
303 JRT_BLOCK_END;
305 if (GraphKit::use_ReduceInitialCardMarks()) {
306 // inform GC that we won't do card marks for initializing writes.
307 new_store_pre_barrier(thread);
308 }
309 JRT_END
311 // array allocation without zeroing
312 JRT_BLOCK_ENTRY(void, OptoRuntime::new_array_nozero_C(Klass* array_type, int len, JavaThread *thread))
313 JRT_BLOCK;
314 #ifndef PRODUCT
315 SharedRuntime::_new_array_ctr++; // new array requires GC
316 #endif
317 assert(check_compiled_frame(thread), "incorrect caller");
319 // Scavenge and allocate an instance.
320 oop result;
322 assert(array_type->oop_is_typeArray(), "should be called only for type array");
323 // The oopFactory likes to work with the element type.
324 BasicType elem_type = TypeArrayKlass::cast(array_type)->element_type();
325 result = oopFactory::new_typeArray_nozero(elem_type, len, THREAD);
327 // Pass oops back through thread local storage. Our apparent type to Java
328 // is that we return an oop, but we can block on exit from this routine and
329 // a GC can trash the oop in C's return register. The generated stub will
330 // fetch the oop from TLS after any possible GC.
331 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
332 thread->set_vm_result(result);
333 JRT_BLOCK_END;
335 if (GraphKit::use_ReduceInitialCardMarks()) {
336 // inform GC that we won't do card marks for initializing writes.
337 new_store_pre_barrier(thread);
338 }
340 oop result = thread->vm_result();
341 if ((len > 0) && (result != NULL) &&
342 is_deoptimized_caller_frame(thread)) {
343 // Zero array here if the caller is deoptimized.
344 int size = ((typeArrayOop)result)->object_size();
345 BasicType elem_type = TypeArrayKlass::cast(array_type)->element_type();
346 const size_t hs = arrayOopDesc::header_size(elem_type);
347 // Align to next 8 bytes to avoid trashing arrays's length.
348 const size_t aligned_hs = align_object_offset(hs);
349 HeapWord* obj = (HeapWord*)result;
350 if (aligned_hs > hs) {
351 Copy::zero_to_words(obj+hs, aligned_hs-hs);
352 }
353 // Optimized zeroing.
354 Copy::fill_to_aligned_words(obj+aligned_hs, size-aligned_hs);
355 }
357 JRT_END
359 // Note: multianewarray for one dimension is handled inline by GraphKit::new_array.
361 // multianewarray for 2 dimensions
362 JRT_ENTRY(void, OptoRuntime::multianewarray2_C(Klass* elem_type, int len1, int len2, JavaThread *thread))
363 #ifndef PRODUCT
364 SharedRuntime::_multi2_ctr++; // multianewarray for 1 dimension
365 #endif
366 assert(check_compiled_frame(thread), "incorrect caller");
367 assert(elem_type->is_klass(), "not a class");
368 jint dims[2];
369 dims[0] = len1;
370 dims[1] = len2;
371 oop obj = ArrayKlass::cast(elem_type)->multi_allocate(2, dims, THREAD);
372 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
373 thread->set_vm_result(obj);
374 JRT_END
376 // multianewarray for 3 dimensions
377 JRT_ENTRY(void, OptoRuntime::multianewarray3_C(Klass* elem_type, int len1, int len2, int len3, JavaThread *thread))
378 #ifndef PRODUCT
379 SharedRuntime::_multi3_ctr++; // multianewarray for 1 dimension
380 #endif
381 assert(check_compiled_frame(thread), "incorrect caller");
382 assert(elem_type->is_klass(), "not a class");
383 jint dims[3];
384 dims[0] = len1;
385 dims[1] = len2;
386 dims[2] = len3;
387 oop obj = ArrayKlass::cast(elem_type)->multi_allocate(3, dims, THREAD);
388 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
389 thread->set_vm_result(obj);
390 JRT_END
392 // multianewarray for 4 dimensions
393 JRT_ENTRY(void, OptoRuntime::multianewarray4_C(Klass* elem_type, int len1, int len2, int len3, int len4, JavaThread *thread))
394 #ifndef PRODUCT
395 SharedRuntime::_multi4_ctr++; // multianewarray for 1 dimension
396 #endif
397 assert(check_compiled_frame(thread), "incorrect caller");
398 assert(elem_type->is_klass(), "not a class");
399 jint dims[4];
400 dims[0] = len1;
401 dims[1] = len2;
402 dims[2] = len3;
403 dims[3] = len4;
404 oop obj = ArrayKlass::cast(elem_type)->multi_allocate(4, dims, THREAD);
405 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
406 thread->set_vm_result(obj);
407 JRT_END
409 // multianewarray for 5 dimensions
410 JRT_ENTRY(void, OptoRuntime::multianewarray5_C(Klass* elem_type, int len1, int len2, int len3, int len4, int len5, JavaThread *thread))
411 #ifndef PRODUCT
412 SharedRuntime::_multi5_ctr++; // multianewarray for 1 dimension
413 #endif
414 assert(check_compiled_frame(thread), "incorrect caller");
415 assert(elem_type->is_klass(), "not a class");
416 jint dims[5];
417 dims[0] = len1;
418 dims[1] = len2;
419 dims[2] = len3;
420 dims[3] = len4;
421 dims[4] = len5;
422 oop obj = ArrayKlass::cast(elem_type)->multi_allocate(5, dims, THREAD);
423 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
424 thread->set_vm_result(obj);
425 JRT_END
427 JRT_ENTRY(void, OptoRuntime::multianewarrayN_C(Klass* elem_type, arrayOopDesc* dims, JavaThread *thread))
428 assert(check_compiled_frame(thread), "incorrect caller");
429 assert(elem_type->is_klass(), "not a class");
430 assert(oop(dims)->is_typeArray(), "not an array");
432 ResourceMark rm;
433 jint len = dims->length();
434 assert(len > 0, "Dimensions array should contain data");
435 jint *j_dims = typeArrayOop(dims)->int_at_addr(0);
436 jint *c_dims = NEW_RESOURCE_ARRAY(jint, len);
437 Copy::conjoint_jints_atomic(j_dims, c_dims, len);
439 oop obj = ArrayKlass::cast(elem_type)->multi_allocate(len, c_dims, THREAD);
440 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
441 thread->set_vm_result(obj);
442 JRT_END
445 const TypeFunc *OptoRuntime::new_instance_Type() {
446 // create input type (domain)
447 const Type **fields = TypeTuple::fields(1);
448 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated
449 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
451 // create result type (range)
452 fields = TypeTuple::fields(1);
453 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
455 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
457 return TypeFunc::make(domain, range);
458 }
461 const TypeFunc *OptoRuntime::athrow_Type() {
462 // create input type (domain)
463 const Type **fields = TypeTuple::fields(1);
464 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated
465 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
467 // create result type (range)
468 fields = TypeTuple::fields(0);
470 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
472 return TypeFunc::make(domain, range);
473 }
476 const TypeFunc *OptoRuntime::new_array_Type() {
477 // create input type (domain)
478 const Type **fields = TypeTuple::fields(2);
479 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass
480 fields[TypeFunc::Parms+1] = TypeInt::INT; // array size
481 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
483 // create result type (range)
484 fields = TypeTuple::fields(1);
485 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
487 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
489 return TypeFunc::make(domain, range);
490 }
492 const TypeFunc *OptoRuntime::multianewarray_Type(int ndim) {
493 // create input type (domain)
494 const int nargs = ndim + 1;
495 const Type **fields = TypeTuple::fields(nargs);
496 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass
497 for( int i = 1; i < nargs; i++ )
498 fields[TypeFunc::Parms + i] = TypeInt::INT; // array size
499 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+nargs, fields);
501 // create result type (range)
502 fields = TypeTuple::fields(1);
503 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
504 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
506 return TypeFunc::make(domain, range);
507 }
509 const TypeFunc *OptoRuntime::multianewarray2_Type() {
510 return multianewarray_Type(2);
511 }
513 const TypeFunc *OptoRuntime::multianewarray3_Type() {
514 return multianewarray_Type(3);
515 }
517 const TypeFunc *OptoRuntime::multianewarray4_Type() {
518 return multianewarray_Type(4);
519 }
521 const TypeFunc *OptoRuntime::multianewarray5_Type() {
522 return multianewarray_Type(5);
523 }
525 const TypeFunc *OptoRuntime::multianewarrayN_Type() {
526 // create input type (domain)
527 const Type **fields = TypeTuple::fields(2);
528 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass
529 fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // array of dim sizes
530 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
532 // create result type (range)
533 fields = TypeTuple::fields(1);
534 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
535 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
537 return TypeFunc::make(domain, range);
538 }
540 const TypeFunc *OptoRuntime::g1_wb_pre_Type() {
541 const Type **fields = TypeTuple::fields(2);
542 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // original field value
543 fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // thread
544 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
546 // create result type (range)
547 fields = TypeTuple::fields(0);
548 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
550 return TypeFunc::make(domain, range);
551 }
553 const TypeFunc *OptoRuntime::g1_wb_post_Type() {
555 const Type **fields = TypeTuple::fields(2);
556 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Card addr
557 fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // thread
558 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
560 // create result type (range)
561 fields = TypeTuple::fields(0);
562 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
564 return TypeFunc::make(domain, range);
565 }
567 const TypeFunc *OptoRuntime::uncommon_trap_Type() {
568 // create input type (domain)
569 const Type **fields = TypeTuple::fields(1);
570 // Symbol* name of class to be loaded
571 fields[TypeFunc::Parms+0] = TypeInt::INT;
572 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
574 // create result type (range)
575 fields = TypeTuple::fields(0);
576 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
578 return TypeFunc::make(domain, range);
579 }
581 # ifdef ENABLE_ZAP_DEAD_LOCALS
582 // Type used for stub generation for zap_dead_locals.
583 // No inputs or outputs
584 const TypeFunc *OptoRuntime::zap_dead_locals_Type() {
585 // create input type (domain)
586 const Type **fields = TypeTuple::fields(0);
587 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms,fields);
589 // create result type (range)
590 fields = TypeTuple::fields(0);
591 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms,fields);
593 return TypeFunc::make(domain,range);
594 }
595 # endif
598 //-----------------------------------------------------------------------------
599 // Monitor Handling
600 const TypeFunc *OptoRuntime::complete_monitor_enter_Type() {
601 // create input type (domain)
602 const Type **fields = TypeTuple::fields(2);
603 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked
604 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock
605 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
607 // create result type (range)
608 fields = TypeTuple::fields(0);
610 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
612 return TypeFunc::make(domain,range);
613 }
616 //-----------------------------------------------------------------------------
617 const TypeFunc *OptoRuntime::complete_monitor_exit_Type() {
618 // create input type (domain)
619 const Type **fields = TypeTuple::fields(2);
620 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked
621 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock
622 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
624 // create result type (range)
625 fields = TypeTuple::fields(0);
627 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
629 return TypeFunc::make(domain,range);
630 }
632 const TypeFunc* OptoRuntime::flush_windows_Type() {
633 // create input type (domain)
634 const Type** fields = TypeTuple::fields(1);
635 fields[TypeFunc::Parms+0] = NULL; // void
636 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms, fields);
638 // create result type
639 fields = TypeTuple::fields(1);
640 fields[TypeFunc::Parms+0] = NULL; // void
641 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
643 return TypeFunc::make(domain, range);
644 }
646 const TypeFunc* OptoRuntime::l2f_Type() {
647 // create input type (domain)
648 const Type **fields = TypeTuple::fields(2);
649 fields[TypeFunc::Parms+0] = TypeLong::LONG;
650 fields[TypeFunc::Parms+1] = Type::HALF;
651 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
653 // create result type (range)
654 fields = TypeTuple::fields(1);
655 fields[TypeFunc::Parms+0] = Type::FLOAT;
656 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
658 return TypeFunc::make(domain, range);
659 }
661 const TypeFunc* OptoRuntime::modf_Type() {
662 const Type **fields = TypeTuple::fields(2);
663 fields[TypeFunc::Parms+0] = Type::FLOAT;
664 fields[TypeFunc::Parms+1] = Type::FLOAT;
665 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
667 // create result type (range)
668 fields = TypeTuple::fields(1);
669 fields[TypeFunc::Parms+0] = Type::FLOAT;
671 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
673 return TypeFunc::make(domain, range);
674 }
676 const TypeFunc *OptoRuntime::Math_D_D_Type() {
677 // create input type (domain)
678 const Type **fields = TypeTuple::fields(2);
679 // Symbol* name of class to be loaded
680 fields[TypeFunc::Parms+0] = Type::DOUBLE;
681 fields[TypeFunc::Parms+1] = Type::HALF;
682 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
684 // create result type (range)
685 fields = TypeTuple::fields(2);
686 fields[TypeFunc::Parms+0] = Type::DOUBLE;
687 fields[TypeFunc::Parms+1] = Type::HALF;
688 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
690 return TypeFunc::make(domain, range);
691 }
693 const TypeFunc* OptoRuntime::Math_DD_D_Type() {
694 const Type **fields = TypeTuple::fields(4);
695 fields[TypeFunc::Parms+0] = Type::DOUBLE;
696 fields[TypeFunc::Parms+1] = Type::HALF;
697 fields[TypeFunc::Parms+2] = Type::DOUBLE;
698 fields[TypeFunc::Parms+3] = Type::HALF;
699 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+4, fields);
701 // create result type (range)
702 fields = TypeTuple::fields(2);
703 fields[TypeFunc::Parms+0] = Type::DOUBLE;
704 fields[TypeFunc::Parms+1] = Type::HALF;
705 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
707 return TypeFunc::make(domain, range);
708 }
710 //-------------- currentTimeMillis, currentTimeNanos, etc
712 const TypeFunc* OptoRuntime::void_long_Type() {
713 // create input type (domain)
714 const Type **fields = TypeTuple::fields(0);
715 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+0, fields);
717 // create result type (range)
718 fields = TypeTuple::fields(2);
719 fields[TypeFunc::Parms+0] = TypeLong::LONG;
720 fields[TypeFunc::Parms+1] = Type::HALF;
721 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
723 return TypeFunc::make(domain, range);
724 }
726 // arraycopy stub variations:
727 enum ArrayCopyType {
728 ac_fast, // void(ptr, ptr, size_t)
729 ac_checkcast, // int(ptr, ptr, size_t, size_t, ptr)
730 ac_slow, // void(ptr, int, ptr, int, int)
731 ac_generic // int(ptr, int, ptr, int, int)
732 };
734 static const TypeFunc* make_arraycopy_Type(ArrayCopyType act) {
735 // create input type (domain)
736 int num_args = (act == ac_fast ? 3 : 5);
737 int num_size_args = (act == ac_fast ? 1 : act == ac_checkcast ? 2 : 0);
738 int argcnt = num_args;
739 LP64_ONLY(argcnt += num_size_args); // halfwords for lengths
740 const Type** fields = TypeTuple::fields(argcnt);
741 int argp = TypeFunc::Parms;
742 fields[argp++] = TypePtr::NOTNULL; // src
743 if (num_size_args == 0) {
744 fields[argp++] = TypeInt::INT; // src_pos
745 }
746 fields[argp++] = TypePtr::NOTNULL; // dest
747 if (num_size_args == 0) {
748 fields[argp++] = TypeInt::INT; // dest_pos
749 fields[argp++] = TypeInt::INT; // length
750 }
751 while (num_size_args-- > 0) {
752 fields[argp++] = TypeX_X; // size in whatevers (size_t)
753 LP64_ONLY(fields[argp++] = Type::HALF); // other half of long length
754 }
755 if (act == ac_checkcast) {
756 fields[argp++] = TypePtr::NOTNULL; // super_klass
757 }
758 assert(argp == TypeFunc::Parms+argcnt, "correct decoding of act");
759 const TypeTuple* domain = TypeTuple::make(TypeFunc::Parms+argcnt, fields);
761 // create result type if needed
762 int retcnt = (act == ac_checkcast || act == ac_generic ? 1 : 0);
763 fields = TypeTuple::fields(1);
764 if (retcnt == 0)
765 fields[TypeFunc::Parms+0] = NULL; // void
766 else
767 fields[TypeFunc::Parms+0] = TypeInt::INT; // status result, if needed
768 const TypeTuple* range = TypeTuple::make(TypeFunc::Parms+retcnt, fields);
769 return TypeFunc::make(domain, range);
770 }
772 const TypeFunc* OptoRuntime::fast_arraycopy_Type() {
773 // This signature is simple: Two base pointers and a size_t.
774 return make_arraycopy_Type(ac_fast);
775 }
777 const TypeFunc* OptoRuntime::checkcast_arraycopy_Type() {
778 // An extension of fast_arraycopy_Type which adds type checking.
779 return make_arraycopy_Type(ac_checkcast);
780 }
782 const TypeFunc* OptoRuntime::slow_arraycopy_Type() {
783 // This signature is exactly the same as System.arraycopy.
784 // There are no intptr_t (int/long) arguments.
785 return make_arraycopy_Type(ac_slow);
786 }
788 const TypeFunc* OptoRuntime::generic_arraycopy_Type() {
789 // This signature is like System.arraycopy, except that it returns status.
790 return make_arraycopy_Type(ac_generic);
791 }
794 const TypeFunc* OptoRuntime::array_fill_Type() {
795 // create input type (domain): pointer, int, size_t
796 const Type** fields = TypeTuple::fields(3 LP64_ONLY( + 1));
797 int argp = TypeFunc::Parms;
798 fields[argp++] = TypePtr::NOTNULL;
799 fields[argp++] = TypeInt::INT;
800 fields[argp++] = TypeX_X; // size in whatevers (size_t)
801 LP64_ONLY(fields[argp++] = Type::HALF); // other half of long length
802 const TypeTuple *domain = TypeTuple::make(argp, fields);
804 // create result type
805 fields = TypeTuple::fields(1);
806 fields[TypeFunc::Parms+0] = NULL; // void
807 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
809 return TypeFunc::make(domain, range);
810 }
812 // for aescrypt encrypt/decrypt operations, just three pointers returning void (length is constant)
813 const TypeFunc* OptoRuntime::aescrypt_block_Type() {
814 // create input type (domain)
815 int num_args = 3;
816 int argcnt = num_args;
817 const Type** fields = TypeTuple::fields(argcnt);
818 int argp = TypeFunc::Parms;
819 fields[argp++] = TypePtr::NOTNULL; // src
820 fields[argp++] = TypePtr::NOTNULL; // dest
821 fields[argp++] = TypePtr::NOTNULL; // k array
822 assert(argp == TypeFunc::Parms+argcnt, "correct decoding");
823 const TypeTuple* domain = TypeTuple::make(TypeFunc::Parms+argcnt, fields);
825 // no result type needed
826 fields = TypeTuple::fields(1);
827 fields[TypeFunc::Parms+0] = NULL; // void
828 const TypeTuple* range = TypeTuple::make(TypeFunc::Parms, fields);
829 return TypeFunc::make(domain, range);
830 }
832 /**
833 * int updateBytesCRC32(int crc, byte* b, int len)
834 */
835 const TypeFunc* OptoRuntime::updateBytesCRC32_Type() {
836 // create input type (domain)
837 int num_args = 3;
838 int argcnt = num_args;
839 const Type** fields = TypeTuple::fields(argcnt);
840 int argp = TypeFunc::Parms;
841 fields[argp++] = TypeInt::INT; // crc
842 fields[argp++] = TypePtr::NOTNULL; // src
843 fields[argp++] = TypeInt::INT; // len
844 assert(argp == TypeFunc::Parms+argcnt, "correct decoding");
845 const TypeTuple* domain = TypeTuple::make(TypeFunc::Parms+argcnt, fields);
847 // result type needed
848 fields = TypeTuple::fields(1);
849 fields[TypeFunc::Parms+0] = TypeInt::INT; // crc result
850 const TypeTuple* range = TypeTuple::make(TypeFunc::Parms+1, fields);
851 return TypeFunc::make(domain, range);
852 }
854 // for cipherBlockChaining calls of aescrypt encrypt/decrypt, four pointers and a length, returning void
855 const TypeFunc* OptoRuntime::cipherBlockChaining_aescrypt_Type() {
856 // create input type (domain)
857 int num_args = 5;
858 int argcnt = num_args;
859 const Type** fields = TypeTuple::fields(argcnt);
860 int argp = TypeFunc::Parms;
861 fields[argp++] = TypePtr::NOTNULL; // src
862 fields[argp++] = TypePtr::NOTNULL; // dest
863 fields[argp++] = TypePtr::NOTNULL; // k array
864 fields[argp++] = TypePtr::NOTNULL; // r array
865 fields[argp++] = TypeInt::INT; // src len
866 assert(argp == TypeFunc::Parms+argcnt, "correct decoding");
867 const TypeTuple* domain = TypeTuple::make(TypeFunc::Parms+argcnt, fields);
869 // no result type needed
870 fields = TypeTuple::fields(1);
871 fields[TypeFunc::Parms+0] = NULL; // void
872 const TypeTuple* range = TypeTuple::make(TypeFunc::Parms, fields);
873 return TypeFunc::make(domain, range);
874 }
876 //------------- Interpreter state access for on stack replacement
877 const TypeFunc* OptoRuntime::osr_end_Type() {
878 // create input type (domain)
879 const Type **fields = TypeTuple::fields(1);
880 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // OSR temp buf
881 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
883 // create result type
884 fields = TypeTuple::fields(1);
885 // fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // locked oop
886 fields[TypeFunc::Parms+0] = NULL; // void
887 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
888 return TypeFunc::make(domain, range);
889 }
891 //-------------- methodData update helpers
893 const TypeFunc* OptoRuntime::profile_receiver_type_Type() {
894 // create input type (domain)
895 const Type **fields = TypeTuple::fields(2);
896 fields[TypeFunc::Parms+0] = TypeAryPtr::NOTNULL; // methodData pointer
897 fields[TypeFunc::Parms+1] = TypeInstPtr::BOTTOM; // receiver oop
898 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
900 // create result type
901 fields = TypeTuple::fields(1);
902 fields[TypeFunc::Parms+0] = NULL; // void
903 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
904 return TypeFunc::make(domain,range);
905 }
907 JRT_LEAF(void, OptoRuntime::profile_receiver_type_C(DataLayout* data, oopDesc* receiver))
908 if (receiver == NULL) return;
909 Klass* receiver_klass = receiver->klass();
911 intptr_t* mdp = ((intptr_t*)(data)) + DataLayout::header_size_in_cells();
912 int empty_row = -1; // free row, if any is encountered
914 // ReceiverTypeData* vc = new ReceiverTypeData(mdp);
915 for (uint row = 0; row < ReceiverTypeData::row_limit(); row++) {
916 // if (vc->receiver(row) == receiver_klass)
917 int receiver_off = ReceiverTypeData::receiver_cell_index(row);
918 intptr_t row_recv = *(mdp + receiver_off);
919 if (row_recv == (intptr_t) receiver_klass) {
920 // vc->set_receiver_count(row, vc->receiver_count(row) + DataLayout::counter_increment);
921 int count_off = ReceiverTypeData::receiver_count_cell_index(row);
922 *(mdp + count_off) += DataLayout::counter_increment;
923 return;
924 } else if (row_recv == 0) {
925 // else if (vc->receiver(row) == NULL)
926 empty_row = (int) row;
927 }
928 }
930 if (empty_row != -1) {
931 int receiver_off = ReceiverTypeData::receiver_cell_index(empty_row);
932 // vc->set_receiver(empty_row, receiver_klass);
933 *(mdp + receiver_off) = (intptr_t) receiver_klass;
934 // vc->set_receiver_count(empty_row, DataLayout::counter_increment);
935 int count_off = ReceiverTypeData::receiver_count_cell_index(empty_row);
936 *(mdp + count_off) = DataLayout::counter_increment;
937 } else {
938 // Receiver did not match any saved receiver and there is no empty row for it.
939 // Increment total counter to indicate polymorphic case.
940 intptr_t* count_p = (intptr_t*)(((byte*)(data)) + in_bytes(CounterData::count_offset()));
941 *count_p += DataLayout::counter_increment;
942 }
943 JRT_END
945 //-------------------------------------------------------------------------------------
946 // register policy
948 bool OptoRuntime::is_callee_saved_register(MachRegisterNumbers reg) {
949 assert(reg >= 0 && reg < _last_Mach_Reg, "must be a machine register");
950 switch (register_save_policy[reg]) {
951 case 'C': return false; //SOC
952 case 'E': return true ; //SOE
953 case 'N': return false; //NS
954 case 'A': return false; //AS
955 }
956 ShouldNotReachHere();
957 return false;
958 }
960 //-----------------------------------------------------------------------
961 // Exceptions
962 //
964 static void trace_exception(oop exception_oop, address exception_pc, const char* msg) PRODUCT_RETURN;
966 // The method is an entry that is always called by a C++ method not
967 // directly from compiled code. Compiled code will call the C++ method following.
968 // We can't allow async exception to be installed during exception processing.
969 JRT_ENTRY_NO_ASYNC(address, OptoRuntime::handle_exception_C_helper(JavaThread* thread, nmethod* &nm))
971 // Do not confuse exception_oop with pending_exception. The exception_oop
972 // is only used to pass arguments into the method. Not for general
973 // exception handling. DO NOT CHANGE IT to use pending_exception, since
974 // the runtime stubs checks this on exit.
975 assert(thread->exception_oop() != NULL, "exception oop is found");
976 address handler_address = NULL;
978 Handle exception(thread, thread->exception_oop());
980 if (TraceExceptions) {
981 trace_exception(exception(), thread->exception_pc(), "");
982 }
983 // for AbortVMOnException flag
984 NOT_PRODUCT(Exceptions::debug_check_abort(exception));
986 #ifdef ASSERT
987 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
988 // should throw an exception here
989 ShouldNotReachHere();
990 }
991 #endif
994 // new exception handling: this method is entered only from adapters
995 // exceptions from compiled java methods are handled in compiled code
996 // using rethrow node
998 address pc = thread->exception_pc();
999 nm = CodeCache::find_nmethod(pc);
1000 assert(nm != NULL, "No NMethod found");
1001 if (nm->is_native_method()) {
1002 fatal("Native mathod should not have path to exception handling");
1003 } else {
1004 // we are switching to old paradigm: search for exception handler in caller_frame
1005 // instead in exception handler of caller_frame.sender()
1007 if (JvmtiExport::can_post_on_exceptions()) {
1008 // "Full-speed catching" is not necessary here,
1009 // since we're notifying the VM on every catch.
1010 // Force deoptimization and the rest of the lookup
1011 // will be fine.
1012 deoptimize_caller_frame(thread);
1013 }
1015 // Check the stack guard pages. If enabled, look for handler in this frame;
1016 // otherwise, forcibly unwind the frame.
1017 //
1018 // 4826555: use default current sp for reguard_stack instead of &nm: it's more accurate.
1019 bool force_unwind = !thread->reguard_stack();
1020 bool deopting = false;
1021 if (nm->is_deopt_pc(pc)) {
1022 deopting = true;
1023 RegisterMap map(thread, false);
1024 frame deoptee = thread->last_frame().sender(&map);
1025 assert(deoptee.is_deoptimized_frame(), "must be deopted");
1026 // Adjust the pc back to the original throwing pc
1027 pc = deoptee.pc();
1028 }
1030 // If we are forcing an unwind because of stack overflow then deopt is
1031 // irrelevant sice we are throwing the frame away anyway.
1033 if (deopting && !force_unwind) {
1034 handler_address = SharedRuntime::deopt_blob()->unpack_with_exception();
1035 } else {
1037 handler_address =
1038 force_unwind ? NULL : nm->handler_for_exception_and_pc(exception, pc);
1040 if (handler_address == NULL) {
1041 Handle original_exception(thread, exception());
1042 handler_address = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true);
1043 assert (handler_address != NULL, "must have compiled handler");
1044 // Update the exception cache only when the unwind was not forced
1045 // and there didn't happen another exception during the computation of the
1046 // compiled exception handler.
1047 if (!force_unwind && original_exception() == exception()) {
1048 nm->add_handler_for_exception_and_pc(exception,pc,handler_address);
1049 }
1050 } else {
1051 assert(handler_address == SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true), "Must be the same");
1052 }
1053 }
1055 thread->set_exception_pc(pc);
1056 thread->set_exception_handler_pc(handler_address);
1058 // Check if the exception PC is a MethodHandle call site.
1059 thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
1060 }
1062 // Restore correct return pc. Was saved above.
1063 thread->set_exception_oop(exception());
1064 return handler_address;
1066 JRT_END
1068 // We are entering here from exception_blob
1069 // If there is a compiled exception handler in this method, we will continue there;
1070 // otherwise we will unwind the stack and continue at the caller of top frame method
1071 // Note we enter without the usual JRT wrapper. We will call a helper routine that
1072 // will do the normal VM entry. We do it this way so that we can see if the nmethod
1073 // we looked up the handler for has been deoptimized in the meantime. If it has been
1074 // we must not use the handler and instread return the deopt blob.
1075 address OptoRuntime::handle_exception_C(JavaThread* thread) {
1076 //
1077 // We are in Java not VM and in debug mode we have a NoHandleMark
1078 //
1079 #ifndef PRODUCT
1080 SharedRuntime::_find_handler_ctr++; // find exception handler
1081 #endif
1082 debug_only(NoHandleMark __hm;)
1083 nmethod* nm = NULL;
1084 address handler_address = NULL;
1085 {
1086 // Enter the VM
1088 ResetNoHandleMark rnhm;
1089 handler_address = handle_exception_C_helper(thread, nm);
1090 }
1092 // Back in java: Use no oops, DON'T safepoint
1094 // Now check to see if the handler we are returning is in a now
1095 // deoptimized frame
1097 if (nm != NULL) {
1098 RegisterMap map(thread, false);
1099 frame caller = thread->last_frame().sender(&map);
1100 #ifdef ASSERT
1101 assert(caller.is_compiled_frame(), "must be");
1102 #endif // ASSERT
1103 if (caller.is_deoptimized_frame()) {
1104 handler_address = SharedRuntime::deopt_blob()->unpack_with_exception();
1105 }
1106 }
1107 return handler_address;
1108 }
1110 //------------------------------rethrow----------------------------------------
1111 // We get here after compiled code has executed a 'RethrowNode'. The callee
1112 // is either throwing or rethrowing an exception. The callee-save registers
1113 // have been restored, synchronized objects have been unlocked and the callee
1114 // stack frame has been removed. The return address was passed in.
1115 // Exception oop is passed as the 1st argument. This routine is then called
1116 // from the stub. On exit, we know where to jump in the caller's code.
1117 // After this C code exits, the stub will pop his frame and end in a jump
1118 // (instead of a return). We enter the caller's default handler.
1119 //
1120 // This must be JRT_LEAF:
1121 // - caller will not change its state as we cannot block on exit,
1122 // therefore raw_exception_handler_for_return_address is all it takes
1123 // to handle deoptimized blobs
1124 //
1125 // However, there needs to be a safepoint check in the middle! So compiled
1126 // safepoints are completely watertight.
1127 //
1128 // Thus, it cannot be a leaf since it contains the No_GC_Verifier.
1129 //
1130 // *THIS IS NOT RECOMMENDED PROGRAMMING STYLE*
1131 //
1132 address OptoRuntime::rethrow_C(oopDesc* exception, JavaThread* thread, address ret_pc) {
1133 #ifndef PRODUCT
1134 SharedRuntime::_rethrow_ctr++; // count rethrows
1135 #endif
1136 assert (exception != NULL, "should have thrown a NULLPointerException");
1137 #ifdef ASSERT
1138 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
1139 // should throw an exception here
1140 ShouldNotReachHere();
1141 }
1142 #endif
1144 thread->set_vm_result(exception);
1145 // Frame not compiled (handles deoptimization blob)
1146 return SharedRuntime::raw_exception_handler_for_return_address(thread, ret_pc);
1147 }
1150 const TypeFunc *OptoRuntime::rethrow_Type() {
1151 // create input type (domain)
1152 const Type **fields = TypeTuple::fields(1);
1153 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop
1154 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields);
1156 // create result type (range)
1157 fields = TypeTuple::fields(1);
1158 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop
1159 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
1161 return TypeFunc::make(domain, range);
1162 }
1165 void OptoRuntime::deoptimize_caller_frame(JavaThread *thread, bool doit) {
1166 // Deoptimize the caller before continuing, as the compiled
1167 // exception handler table may not be valid.
1168 if (!StressCompiledExceptionHandlers && doit) {
1169 deoptimize_caller_frame(thread);
1170 }
1171 }
1173 void OptoRuntime::deoptimize_caller_frame(JavaThread *thread) {
1174 // Called from within the owner thread, so no need for safepoint
1175 RegisterMap reg_map(thread);
1176 frame stub_frame = thread->last_frame();
1177 assert(stub_frame.is_runtime_frame() || exception_blob()->contains(stub_frame.pc()), "sanity check");
1178 frame caller_frame = stub_frame.sender(®_map);
1180 // Deoptimize the caller frame.
1181 Deoptimization::deoptimize_frame(thread, caller_frame.id());
1182 }
1185 bool OptoRuntime::is_deoptimized_caller_frame(JavaThread *thread) {
1186 // Called from within the owner thread, so no need for safepoint
1187 RegisterMap reg_map(thread);
1188 frame stub_frame = thread->last_frame();
1189 assert(stub_frame.is_runtime_frame() || exception_blob()->contains(stub_frame.pc()), "sanity check");
1190 frame caller_frame = stub_frame.sender(®_map);
1191 return caller_frame.is_deoptimized_frame();
1192 }
1195 const TypeFunc *OptoRuntime::register_finalizer_Type() {
1196 // create input type (domain)
1197 const Type **fields = TypeTuple::fields(1);
1198 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // oop; Receiver
1199 // // The JavaThread* is passed to each routine as the last argument
1200 // fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // JavaThread *; Executing thread
1201 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields);
1203 // create result type (range)
1204 fields = TypeTuple::fields(0);
1206 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
1208 return TypeFunc::make(domain,range);
1209 }
1212 //-----------------------------------------------------------------------------
1213 // Dtrace support. entry and exit probes have the same signature
1214 const TypeFunc *OptoRuntime::dtrace_method_entry_exit_Type() {
1215 // create input type (domain)
1216 const Type **fields = TypeTuple::fields(2);
1217 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage
1218 fields[TypeFunc::Parms+1] = TypeMetadataPtr::BOTTOM; // Method*; Method we are entering
1219 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
1221 // create result type (range)
1222 fields = TypeTuple::fields(0);
1224 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
1226 return TypeFunc::make(domain,range);
1227 }
1229 const TypeFunc *OptoRuntime::dtrace_object_alloc_Type() {
1230 // create input type (domain)
1231 const Type **fields = TypeTuple::fields(2);
1232 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage
1233 fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // oop; newly allocated object
1235 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
1237 // create result type (range)
1238 fields = TypeTuple::fields(0);
1240 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
1242 return TypeFunc::make(domain,range);
1243 }
1246 JRT_ENTRY_NO_ASYNC(void, OptoRuntime::register_finalizer(oopDesc* obj, JavaThread* thread))
1247 assert(obj->is_oop(), "must be a valid oop");
1248 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
1249 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
1250 JRT_END
1252 //-----------------------------------------------------------------------------
1254 NamedCounter * volatile OptoRuntime::_named_counters = NULL;
1256 //
1257 // dump the collected NamedCounters.
1258 //
1259 void OptoRuntime::print_named_counters() {
1260 int total_lock_count = 0;
1261 int eliminated_lock_count = 0;
1263 NamedCounter* c = _named_counters;
1264 while (c) {
1265 if (c->tag() == NamedCounter::LockCounter || c->tag() == NamedCounter::EliminatedLockCounter) {
1266 int count = c->count();
1267 if (count > 0) {
1268 bool eliminated = c->tag() == NamedCounter::EliminatedLockCounter;
1269 if (Verbose) {
1270 tty->print_cr("%d %s%s", count, c->name(), eliminated ? " (eliminated)" : "");
1271 }
1272 total_lock_count += count;
1273 if (eliminated) {
1274 eliminated_lock_count += count;
1275 }
1276 }
1277 } else if (c->tag() == NamedCounter::BiasedLockingCounter) {
1278 BiasedLockingCounters* blc = ((BiasedLockingNamedCounter*)c)->counters();
1279 if (blc->nonzero()) {
1280 tty->print_cr("%s", c->name());
1281 blc->print_on(tty);
1282 }
1283 }
1284 c = c->next();
1285 }
1286 if (total_lock_count > 0) {
1287 tty->print_cr("dynamic locks: %d", total_lock_count);
1288 if (eliminated_lock_count) {
1289 tty->print_cr("eliminated locks: %d (%d%%)", eliminated_lock_count,
1290 (int)(eliminated_lock_count * 100.0 / total_lock_count));
1291 }
1292 }
1293 }
1295 //
1296 // Allocate a new NamedCounter. The JVMState is used to generate the
1297 // name which consists of method@line for the inlining tree.
1298 //
1300 NamedCounter* OptoRuntime::new_named_counter(JVMState* youngest_jvms, NamedCounter::CounterTag tag) {
1301 int max_depth = youngest_jvms->depth();
1303 // Visit scopes from youngest to oldest.
1304 bool first = true;
1305 stringStream st;
1306 for (int depth = max_depth; depth >= 1; depth--) {
1307 JVMState* jvms = youngest_jvms->of_depth(depth);
1308 ciMethod* m = jvms->has_method() ? jvms->method() : NULL;
1309 if (!first) {
1310 st.print(" ");
1311 } else {
1312 first = false;
1313 }
1314 int bci = jvms->bci();
1315 if (bci < 0) bci = 0;
1316 st.print("%s.%s@%d", m->holder()->name()->as_utf8(), m->name()->as_utf8(), bci);
1317 // To print linenumbers instead of bci use: m->line_number_from_bci(bci)
1318 }
1319 NamedCounter* c;
1320 if (tag == NamedCounter::BiasedLockingCounter) {
1321 c = new BiasedLockingNamedCounter(strdup(st.as_string()));
1322 } else {
1323 c = new NamedCounter(strdup(st.as_string()), tag);
1324 }
1326 // atomically add the new counter to the head of the list. We only
1327 // add counters so this is safe.
1328 NamedCounter* head;
1329 do {
1330 head = _named_counters;
1331 c->set_next(head);
1332 } while (Atomic::cmpxchg_ptr(c, &_named_counters, head) != head);
1333 return c;
1334 }
1336 //-----------------------------------------------------------------------------
1337 // Non-product code
1338 #ifndef PRODUCT
1340 int trace_exception_counter = 0;
1341 static void trace_exception(oop exception_oop, address exception_pc, const char* msg) {
1342 ttyLocker ttyl;
1343 trace_exception_counter++;
1344 tty->print("%d [Exception (%s): ", trace_exception_counter, msg);
1345 exception_oop->print_value();
1346 tty->print(" in ");
1347 CodeBlob* blob = CodeCache::find_blob(exception_pc);
1348 if (blob->is_nmethod()) {
1349 ((nmethod*)blob)->method()->print_value();
1350 } else if (blob->is_runtime_stub()) {
1351 tty->print("<runtime-stub>");
1352 } else {
1353 tty->print("<unknown>");
1354 }
1355 tty->print(" at " INTPTR_FORMAT, exception_pc);
1356 tty->print_cr("]");
1357 }
1359 #endif // PRODUCT
1362 # ifdef ENABLE_ZAP_DEAD_LOCALS
1363 // Called from call sites in compiled code with oop maps (actually safepoints)
1364 // Zaps dead locals in first java frame.
1365 // Is entry because may need to lock to generate oop maps
1366 // Currently, only used for compiler frames, but someday may be used
1367 // for interpreter frames, too.
1369 int OptoRuntime::ZapDeadCompiledLocals_count = 0;
1371 // avoid pointers to member funcs with these helpers
1372 static bool is_java_frame( frame* f) { return f->is_java_frame(); }
1373 static bool is_native_frame(frame* f) { return f->is_native_frame(); }
1376 void OptoRuntime::zap_dead_java_or_native_locals(JavaThread* thread,
1377 bool (*is_this_the_right_frame_to_zap)(frame*)) {
1378 assert(JavaThread::current() == thread, "is this needed?");
1380 if ( !ZapDeadCompiledLocals ) return;
1382 bool skip = false;
1384 if ( ZapDeadCompiledLocalsFirst == 0 ) ; // nothing special
1385 else if ( ZapDeadCompiledLocalsFirst > ZapDeadCompiledLocals_count ) skip = true;
1386 else if ( ZapDeadCompiledLocalsFirst == ZapDeadCompiledLocals_count )
1387 warning("starting zapping after skipping");
1389 if ( ZapDeadCompiledLocalsLast == -1 ) ; // nothing special
1390 else if ( ZapDeadCompiledLocalsLast < ZapDeadCompiledLocals_count ) skip = true;
1391 else if ( ZapDeadCompiledLocalsLast == ZapDeadCompiledLocals_count )
1392 warning("about to zap last zap");
1394 ++ZapDeadCompiledLocals_count; // counts skipped zaps, too
1396 if ( skip ) return;
1398 // find java frame and zap it
1400 for (StackFrameStream sfs(thread); !sfs.is_done(); sfs.next()) {
1401 if (is_this_the_right_frame_to_zap(sfs.current()) ) {
1402 sfs.current()->zap_dead_locals(thread, sfs.register_map());
1403 return;
1404 }
1405 }
1406 warning("no frame found to zap in zap_dead_Java_locals_C");
1407 }
1409 JRT_LEAF(void, OptoRuntime::zap_dead_Java_locals_C(JavaThread* thread))
1410 zap_dead_java_or_native_locals(thread, is_java_frame);
1411 JRT_END
1413 // The following does not work because for one thing, the
1414 // thread state is wrong; it expects java, but it is native.
1415 // Also, the invariants in a native stub are different and
1416 // I'm not sure it is safe to have a MachCalRuntimeDirectNode
1417 // in there.
1418 // So for now, we do not zap in native stubs.
1420 JRT_LEAF(void, OptoRuntime::zap_dead_native_locals_C(JavaThread* thread))
1421 zap_dead_java_or_native_locals(thread, is_native_frame);
1422 JRT_END
1424 # endif