Mercurial > hg > truffle
annotate src/share/vm/interpreter/interpreterRuntime.cpp @ 6217:e74da3c2b827
Merge
author | jiangli |
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date | Fri, 13 Jul 2012 20:14:27 -0400 |
parents | d2a62e0f25eb 8150fa46d2ed |
children | dd785aabe02b |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "classfile/vmSymbols.hpp" | |
28 #include "compiler/compileBroker.hpp" | |
29 #include "gc_interface/collectedHeap.hpp" | |
30 #include "interpreter/interpreter.hpp" | |
31 #include "interpreter/interpreterRuntime.hpp" | |
32 #include "interpreter/linkResolver.hpp" | |
33 #include "interpreter/templateTable.hpp" | |
34 #include "memory/oopFactory.hpp" | |
35 #include "memory/universe.inline.hpp" | |
36 #include "oops/constantPoolOop.hpp" | |
37 #include "oops/cpCacheOop.hpp" | |
38 #include "oops/instanceKlass.hpp" | |
39 #include "oops/methodDataOop.hpp" | |
40 #include "oops/objArrayKlass.hpp" | |
41 #include "oops/oop.inline.hpp" | |
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42 #include "oops/symbol.hpp" |
1972 | 43 #include "prims/jvmtiExport.hpp" |
44 #include "prims/nativeLookup.hpp" | |
45 #include "runtime/biasedLocking.hpp" | |
46 #include "runtime/compilationPolicy.hpp" | |
47 #include "runtime/deoptimization.hpp" | |
48 #include "runtime/fieldDescriptor.hpp" | |
49 #include "runtime/handles.inline.hpp" | |
50 #include "runtime/interfaceSupport.hpp" | |
51 #include "runtime/java.hpp" | |
52 #include "runtime/jfieldIDWorkaround.hpp" | |
53 #include "runtime/osThread.hpp" | |
54 #include "runtime/sharedRuntime.hpp" | |
55 #include "runtime/stubRoutines.hpp" | |
56 #include "runtime/synchronizer.hpp" | |
57 #include "runtime/threadCritical.hpp" | |
58 #include "utilities/events.hpp" | |
59 #ifdef TARGET_ARCH_x86 | |
60 # include "vm_version_x86.hpp" | |
61 #endif | |
62 #ifdef TARGET_ARCH_sparc | |
63 # include "vm_version_sparc.hpp" | |
64 #endif | |
65 #ifdef TARGET_ARCH_zero | |
66 # include "vm_version_zero.hpp" | |
67 #endif | |
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68 #ifdef TARGET_ARCH_arm |
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69 # include "vm_version_arm.hpp" |
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70 #endif |
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71 #ifdef TARGET_ARCH_ppc |
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72 # include "vm_version_ppc.hpp" |
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73 #endif |
1972 | 74 #ifdef COMPILER2 |
75 #include "opto/runtime.hpp" | |
76 #endif | |
0 | 77 |
78 class UnlockFlagSaver { | |
79 private: | |
80 JavaThread* _thread; | |
81 bool _do_not_unlock; | |
82 public: | |
83 UnlockFlagSaver(JavaThread* t) { | |
84 _thread = t; | |
85 _do_not_unlock = t->do_not_unlock_if_synchronized(); | |
86 t->set_do_not_unlock_if_synchronized(false); | |
87 } | |
88 ~UnlockFlagSaver() { | |
89 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); | |
90 } | |
91 }; | |
92 | |
93 //------------------------------------------------------------------------------------------------------------------------ | |
94 // State accessors | |
95 | |
96 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { | |
97 last_frame(thread).interpreter_frame_set_bcp(bcp); | |
98 if (ProfileInterpreter) { | |
99 // ProfileTraps uses MDOs independently of ProfileInterpreter. | |
100 // That is why we must check both ProfileInterpreter and mdo != NULL. | |
101 methodDataOop mdo = last_frame(thread).interpreter_frame_method()->method_data(); | |
102 if (mdo != NULL) { | |
103 NEEDS_CLEANUP; | |
104 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); | |
105 } | |
106 } | |
107 } | |
108 | |
109 //------------------------------------------------------------------------------------------------------------------------ | |
110 // Constants | |
111 | |
112 | |
113 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) | |
114 // access constant pool | |
115 constantPoolOop pool = method(thread)->constants(); | |
1565 | 116 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); |
0 | 117 constantTag tag = pool->tag_at(index); |
118 | |
119 if (tag.is_unresolved_klass() || tag.is_klass()) { | |
120 klassOop klass = pool->klass_at(index, CHECK); | |
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121 oop java_class = klass->java_mirror(); |
0 | 122 thread->set_vm_result(java_class); |
123 } else { | |
124 #ifdef ASSERT | |
125 // If we entered this runtime routine, we believed the tag contained | |
126 // an unresolved string, an unresolved class or a resolved class. | |
127 // However, another thread could have resolved the unresolved string | |
128 // or class by the time we go there. | |
129 assert(tag.is_unresolved_string()|| tag.is_string(), "expected string"); | |
130 #endif | |
131 oop s_oop = pool->string_at(index, CHECK); | |
132 thread->set_vm_result(s_oop); | |
133 } | |
134 IRT_END | |
135 | |
1602 | 136 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { |
137 assert(bytecode == Bytecodes::_fast_aldc || | |
138 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); | |
139 ResourceMark rm(thread); | |
140 methodHandle m (thread, method(thread)); | |
2142 | 141 Bytecode_loadconstant ldc(m, bci(thread)); |
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142 oop result = ldc.resolve_constant(CHECK); |
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143 #ifdef ASSERT |
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144 { |
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145 // The bytecode wrappers aren't GC-safe so construct a new one |
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146 Bytecode_loadconstant ldc2(m, bci(thread)); |
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147 ConstantPoolCacheEntry* cpce = m->constants()->cache()->entry_at(ldc2.cache_index()); |
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148 assert(result == cpce->f1(), "expected result for assembly code"); |
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149 } |
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150 #endif |
1602 | 151 } |
152 IRT_END | |
153 | |
0 | 154 |
155 //------------------------------------------------------------------------------------------------------------------------ | |
156 // Allocation | |
157 | |
158 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index)) | |
159 klassOop k_oop = pool->klass_at(index, CHECK); | |
160 instanceKlassHandle klass (THREAD, k_oop); | |
161 | |
162 // Make sure we are not instantiating an abstract klass | |
163 klass->check_valid_for_instantiation(true, CHECK); | |
164 | |
165 // Make sure klass is initialized | |
166 klass->initialize(CHECK); | |
167 | |
168 // At this point the class may not be fully initialized | |
169 // because of recursive initialization. If it is fully | |
170 // initialized & has_finalized is not set, we rewrite | |
171 // it into its fast version (Note: no locking is needed | |
172 // here since this is an atomic byte write and can be | |
173 // done more than once). | |
174 // | |
175 // Note: In case of classes with has_finalized we don't | |
176 // rewrite since that saves us an extra check in | |
177 // the fast version which then would call the | |
178 // slow version anyway (and do a call back into | |
179 // Java). | |
180 // If we have a breakpoint, then we don't rewrite | |
181 // because the _breakpoint bytecode would be lost. | |
182 oop obj = klass->allocate_instance(CHECK); | |
183 thread->set_vm_result(obj); | |
184 IRT_END | |
185 | |
186 | |
187 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) | |
188 oop obj = oopFactory::new_typeArray(type, size, CHECK); | |
189 thread->set_vm_result(obj); | |
190 IRT_END | |
191 | |
192 | |
193 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size)) | |
194 // Note: no oopHandle for pool & klass needed since they are not used | |
195 // anymore after new_objArray() and no GC can happen before. | |
196 // (This may have to change if this code changes!) | |
197 klassOop klass = pool->klass_at(index, CHECK); | |
198 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); | |
199 thread->set_vm_result(obj); | |
200 IRT_END | |
201 | |
202 | |
203 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) | |
204 // We may want to pass in more arguments - could make this slightly faster | |
205 constantPoolOop constants = method(thread)->constants(); | |
1565 | 206 int i = get_index_u2(thread, Bytecodes::_multianewarray); |
0 | 207 klassOop klass = constants->klass_at(i, CHECK); |
208 int nof_dims = number_of_dimensions(thread); | |
209 assert(oop(klass)->is_klass(), "not a class"); | |
210 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); | |
211 | |
212 // We must create an array of jints to pass to multi_allocate. | |
213 ResourceMark rm(thread); | |
214 const int small_dims = 10; | |
215 jint dim_array[small_dims]; | |
216 jint *dims = &dim_array[0]; | |
217 if (nof_dims > small_dims) { | |
218 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); | |
219 } | |
220 for (int index = 0; index < nof_dims; index++) { | |
221 // offset from first_size_address is addressed as local[index] | |
222 int n = Interpreter::local_offset_in_bytes(index)/jintSize; | |
223 dims[index] = first_size_address[n]; | |
224 } | |
225 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); | |
226 thread->set_vm_result(obj); | |
227 IRT_END | |
228 | |
229 | |
230 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
231 assert(obj->is_oop(), "must be a valid oop"); | |
232 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
233 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
234 IRT_END | |
235 | |
236 | |
237 // Quicken instance-of and check-cast bytecodes | |
238 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) | |
239 // Force resolving; quicken the bytecode | |
1565 | 240 int which = get_index_u2(thread, Bytecodes::_checkcast); |
0 | 241 constantPoolOop cpool = method(thread)->constants(); |
242 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded | |
243 // program we might have seen an unquick'd bytecode in the interpreter but have another | |
244 // thread quicken the bytecode before we get here. | |
245 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); | |
246 klassOop klass = cpool->klass_at(which, CHECK); | |
247 thread->set_vm_result(klass); | |
248 IRT_END | |
249 | |
250 | |
251 //------------------------------------------------------------------------------------------------------------------------ | |
252 // Exceptions | |
253 | |
254 // Assume the compiler is (or will be) interested in this event. | |
255 // If necessary, create an MDO to hold the information, and record it. | |
256 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { | |
257 assert(ProfileTraps, "call me only if profiling"); | |
258 methodHandle trap_method(thread, method(thread)); | |
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259 |
0 | 260 if (trap_method.not_null()) { |
261 methodDataHandle trap_mdo(thread, trap_method->method_data()); | |
262 if (trap_mdo.is_null()) { | |
263 methodOopDesc::build_interpreter_method_data(trap_method, THREAD); | |
264 if (HAS_PENDING_EXCEPTION) { | |
265 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
266 CLEAR_PENDING_EXCEPTION; | |
267 } | |
268 trap_mdo = methodDataHandle(thread, trap_method->method_data()); | |
269 // and fall through... | |
270 } | |
271 if (trap_mdo.not_null()) { | |
272 // Update per-method count of trap events. The interpreter | |
273 // is updating the MDO to simulate the effect of compiler traps. | |
274 int trap_bci = trap_method->bci_from(bcp(thread)); | |
275 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); | |
276 } | |
277 } | |
278 } | |
279 | |
280 static Handle get_preinitialized_exception(klassOop k, TRAPS) { | |
281 // get klass | |
282 instanceKlass* klass = instanceKlass::cast(k); | |
283 assert(klass->is_initialized(), | |
284 "this klass should have been initialized during VM initialization"); | |
285 // create instance - do not call constructor since we may have no | |
286 // (java) stack space left (should assert constructor is empty) | |
287 Handle exception; | |
288 oop exception_oop = klass->allocate_instance(CHECK_(exception)); | |
289 exception = Handle(THREAD, exception_oop); | |
290 if (StackTraceInThrowable) { | |
291 java_lang_Throwable::fill_in_stack_trace(exception); | |
292 } | |
293 return exception; | |
294 } | |
295 | |
296 // Special handling for stack overflow: since we don't have any (java) stack | |
297 // space left we use the pre-allocated & pre-initialized StackOverflowError | |
298 // klass to create an stack overflow error instance. We do not call its | |
299 // constructor for the same reason (it is empty, anyway). | |
300 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) | |
301 Handle exception = get_preinitialized_exception( | |
302 SystemDictionary::StackOverflowError_klass(), | |
303 CHECK); | |
304 THROW_HANDLE(exception); | |
305 IRT_END | |
306 | |
307 | |
308 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) | |
309 // lookup exception klass | |
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310 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); |
0 | 311 if (ProfileTraps) { |
312 if (s == vmSymbols::java_lang_ArithmeticException()) { | |
313 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); | |
314 } else if (s == vmSymbols::java_lang_NullPointerException()) { | |
315 note_trap(thread, Deoptimization::Reason_null_check, CHECK); | |
316 } | |
317 } | |
318 // create exception | |
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319 Handle exception = Exceptions::new_exception(thread, s, message); |
0 | 320 thread->set_vm_result(exception()); |
321 IRT_END | |
322 | |
323 | |
324 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) | |
325 ResourceMark rm(thread); | |
326 const char* klass_name = Klass::cast(obj->klass())->external_name(); | |
327 // lookup exception klass | |
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328 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); |
0 | 329 if (ProfileTraps) { |
330 note_trap(thread, Deoptimization::Reason_class_check, CHECK); | |
331 } | |
332 // create exception, with klass name as detail message | |
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333 Handle exception = Exceptions::new_exception(thread, s, klass_name); |
0 | 334 thread->set_vm_result(exception()); |
335 IRT_END | |
336 | |
337 | |
338 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) | |
339 char message[jintAsStringSize]; | |
340 // lookup exception klass | |
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341 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); |
0 | 342 if (ProfileTraps) { |
343 note_trap(thread, Deoptimization::Reason_range_check, CHECK); | |
344 } | |
345 // create exception | |
346 sprintf(message, "%d", index); | |
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347 THROW_MSG(s, message); |
0 | 348 IRT_END |
349 | |
350 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( | |
351 JavaThread* thread, oopDesc* obj)) | |
352 | |
353 ResourceMark rm(thread); | |
354 char* message = SharedRuntime::generate_class_cast_message( | |
355 thread, Klass::cast(obj->klass())->external_name()); | |
356 | |
357 if (ProfileTraps) { | |
358 note_trap(thread, Deoptimization::Reason_class_check, CHECK); | |
359 } | |
360 | |
361 // create exception | |
362 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); | |
363 IRT_END | |
364 | |
365 // exception_handler_for_exception(...) returns the continuation address, | |
366 // the exception oop (via TLS) and sets the bci/bcp for the continuation. | |
367 // The exception oop is returned to make sure it is preserved over GC (it | |
368 // is only on the stack if the exception was thrown explicitly via athrow). | |
369 // During this operation, the expression stack contains the values for the | |
370 // bci where the exception happened. If the exception was propagated back | |
371 // from a call, the expression stack contains the values for the bci at the | |
372 // invoke w/o arguments (i.e., as if one were inside the call). | |
373 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) | |
374 | |
375 Handle h_exception(thread, exception); | |
376 methodHandle h_method (thread, method(thread)); | |
377 constantPoolHandle h_constants(thread, h_method->constants()); | |
378 bool should_repeat; | |
379 int handler_bci; | |
1602 | 380 int current_bci = bci(thread); |
0 | 381 |
382 // Need to do this check first since when _do_not_unlock_if_synchronized | |
383 // is set, we don't want to trigger any classloading which may make calls | |
384 // into java, or surprisingly find a matching exception handler for bci 0 | |
385 // since at this moment the method hasn't been "officially" entered yet. | |
386 if (thread->do_not_unlock_if_synchronized()) { | |
387 ResourceMark rm; | |
388 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); | |
389 thread->set_vm_result(exception); | |
390 #ifdef CC_INTERP | |
391 return (address) -1; | |
392 #else | |
393 return Interpreter::remove_activation_entry(); | |
394 #endif | |
395 } | |
396 | |
397 do { | |
398 should_repeat = false; | |
399 | |
400 // assertions | |
401 #ifdef ASSERT | |
402 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); | |
403 assert(h_exception->is_oop(), "just checking"); | |
404 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError | |
1142 | 405 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { |
0 | 406 if (ExitVMOnVerifyError) vm_exit(-1); |
407 ShouldNotReachHere(); | |
408 } | |
409 #endif | |
410 | |
411 // tracing | |
412 if (TraceExceptions) { | |
413 ttyLocker ttyl; | |
414 ResourceMark rm(thread); | |
415 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); | |
416 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); | |
417 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); | |
418 } | |
419 // Don't go paging in something which won't be used. | |
420 // else if (h_extable->length() == 0) { | |
421 // // disabled for now - interpreter is not using shortcut yet | |
422 // // (shortcut is not to call runtime if we have no exception handlers) | |
423 // // warning("performance bug: should not call runtime if method has no exception handlers"); | |
424 // } | |
425 // for AbortVMOnException flag | |
426 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); | |
427 | |
428 // exception handler lookup | |
429 KlassHandle h_klass(THREAD, h_exception->klass()); | |
430 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); | |
431 if (HAS_PENDING_EXCEPTION) { | |
432 // We threw an exception while trying to find the exception handler. | |
433 // Transfer the new exception to the exception handle which will | |
434 // be set into thread local storage, and do another lookup for an | |
435 // exception handler for this exception, this time starting at the | |
436 // BCI of the exception handler which caused the exception to be | |
437 // thrown (bug 4307310). | |
438 h_exception = Handle(THREAD, PENDING_EXCEPTION); | |
439 CLEAR_PENDING_EXCEPTION; | |
440 if (handler_bci >= 0) { | |
441 current_bci = handler_bci; | |
442 should_repeat = true; | |
443 } | |
444 } | |
445 } while (should_repeat == true); | |
446 | |
447 // notify JVMTI of an exception throw; JVMTI will detect if this is a first | |
448 // time throw or a stack unwinding throw and accordingly notify the debugger | |
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449 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 450 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); |
451 } | |
452 | |
453 #ifdef CC_INTERP | |
454 address continuation = (address)(intptr_t) handler_bci; | |
455 #else | |
456 address continuation = NULL; | |
457 #endif | |
458 address handler_pc = NULL; | |
459 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { | |
460 // Forward exception to callee (leaving bci/bcp untouched) because (a) no | |
461 // handler in this method, or (b) after a stack overflow there is not yet | |
462 // enough stack space available to reprotect the stack. | |
463 #ifndef CC_INTERP | |
464 continuation = Interpreter::remove_activation_entry(); | |
465 #endif | |
466 // Count this for compilation purposes | |
467 h_method->interpreter_throwout_increment(); | |
468 } else { | |
469 // handler in this method => change bci/bcp to handler bci/bcp and continue there | |
470 handler_pc = h_method->code_base() + handler_bci; | |
471 #ifndef CC_INTERP | |
472 set_bcp_and_mdp(handler_pc, thread); | |
473 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; | |
474 #endif | |
475 } | |
476 // notify debugger of an exception catch | |
477 // (this is good for exceptions caught in native methods as well) | |
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478 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 479 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); |
480 } | |
481 | |
482 thread->set_vm_result(h_exception()); | |
483 return continuation; | |
484 IRT_END | |
485 | |
486 | |
487 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) | |
488 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); | |
489 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) | |
490 IRT_END | |
491 | |
492 | |
493 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
494 THROW(vmSymbols::java_lang_AbstractMethodError()); | |
495 IRT_END | |
496 | |
497 | |
498 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) | |
499 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); | |
500 IRT_END | |
501 | |
502 | |
503 //------------------------------------------------------------------------------------------------------------------------ | |
504 // Fields | |
505 // | |
506 | |
507 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) | |
508 // resolve field | |
509 FieldAccessInfo info; | |
510 constantPoolHandle pool(thread, method(thread)->constants()); | |
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511 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic); |
0 | 512 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); |
513 | |
514 { | |
515 JvmtiHideSingleStepping jhss(thread); | |
1565 | 516 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode), |
0 | 517 bytecode, false, CHECK); |
518 } // end JvmtiHideSingleStepping | |
519 | |
520 // check if link resolution caused cpCache to be updated | |
521 if (already_resolved(thread)) return; | |
522 | |
523 // compute auxiliary field attributes | |
524 TosState state = as_TosState(info.field_type()); | |
525 | |
526 // We need to delay resolving put instructions on final fields | |
527 // until we actually invoke one. This is required so we throw | |
528 // exceptions at the correct place. If we do not resolve completely | |
529 // in the current pass, leaving the put_code set to zero will | |
530 // cause the next put instruction to reresolve. | |
531 Bytecodes::Code put_code = (Bytecodes::Code)0; | |
532 | |
533 // We also need to delay resolving getstatic instructions until the | |
534 // class is intitialized. This is required so that access to the static | |
535 // field will call the initialization function every time until the class | |
536 // is completely initialized ala. in 2.17.5 in JVM Specification. | |
537 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); | |
538 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && | |
539 !klass->is_initialized()); | |
540 Bytecodes::Code get_code = (Bytecodes::Code)0; | |
541 | |
542 if (!uninitialized_static) { | |
543 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); | |
544 if (is_put || !info.access_flags().is_final()) { | |
545 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); | |
546 } | |
547 } | |
548 | |
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549 if (is_put && !is_static && klass->is_subclass_of(SystemDictionary::CallSite_klass()) && (info.name() == vmSymbols::target_name())) { |
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550 const jint direction = frame::interpreter_frame_expression_stack_direction(); |
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551 Handle call_site (THREAD, *((oop*) thread->last_frame().interpreter_frame_tos_at(-1 * direction))); |
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552 Handle method_handle(THREAD, *((oop*) thread->last_frame().interpreter_frame_tos_at( 0 * direction))); |
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553 assert(call_site ->is_a(SystemDictionary::CallSite_klass()), "must be"); |
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554 assert(method_handle->is_a(SystemDictionary::MethodHandle_klass()), "must be"); |
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555 |
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556 { |
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557 // Walk all nmethods depending on this call site. |
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558 MutexLocker mu(Compile_lock, thread); |
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559 Universe::flush_dependents_on(call_site, method_handle); |
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560 } |
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561 |
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562 // Don't allow fast path for setting CallSite.target and sub-classes. |
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563 put_code = (Bytecodes::Code) 0; |
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564 } |
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565 |
0 | 566 cache_entry(thread)->set_field( |
567 get_code, | |
568 put_code, | |
569 info.klass(), | |
570 info.field_index(), | |
571 info.field_offset(), | |
572 state, | |
573 info.access_flags().is_final(), | |
574 info.access_flags().is_volatile() | |
575 ); | |
576 IRT_END | |
577 | |
578 | |
579 //------------------------------------------------------------------------------------------------------------------------ | |
580 // Synchronization | |
581 // | |
582 // The interpreter's synchronization code is factored out so that it can | |
583 // be shared by method invocation and synchronized blocks. | |
584 //%note synchronization_3 | |
585 | |
586 static void trace_locking(Handle& h_locking_obj, bool is_locking) { | |
587 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); | |
588 } | |
589 | |
590 | |
591 //%note monitor_1 | |
592 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) | |
593 #ifdef ASSERT | |
594 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
595 #endif | |
596 if (PrintBiasedLockingStatistics) { | |
597 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
598 } | |
599 Handle h_obj(thread, elem->obj()); | |
600 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
601 "must be NULL or an object"); | |
602 if (UseBiasedLocking) { | |
603 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
604 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); | |
605 } else { | |
606 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); | |
607 } | |
608 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), | |
609 "must be NULL or an object"); | |
610 #ifdef ASSERT | |
611 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
612 #endif | |
613 IRT_END | |
614 | |
615 | |
616 //%note monitor_1 | |
617 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) | |
618 #ifdef ASSERT | |
619 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
620 #endif | |
621 Handle h_obj(thread, elem->obj()); | |
622 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
623 "must be NULL or an object"); | |
624 if (elem == NULL || h_obj()->is_unlocked()) { | |
625 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
626 } | |
627 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); | |
628 // Free entry. This must be done here, since a pending exception might be installed on | |
629 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. | |
630 elem->set_obj(NULL); | |
631 #ifdef ASSERT | |
632 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
633 #endif | |
634 IRT_END | |
635 | |
636 | |
637 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) | |
638 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
639 IRT_END | |
640 | |
641 | |
642 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) | |
643 // Returns an illegal exception to install into the current thread. The | |
644 // pending_exception flag is cleared so normal exception handling does not | |
645 // trigger. Any current installed exception will be overwritten. This | |
646 // method will be called during an exception unwind. | |
647 | |
648 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); | |
649 Handle exception(thread, thread->vm_result()); | |
650 assert(exception() != NULL, "vm result should be set"); | |
651 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) | |
1142 | 652 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 653 exception = get_preinitialized_exception( |
654 SystemDictionary::IllegalMonitorStateException_klass(), | |
655 CATCH); | |
656 } | |
657 thread->set_vm_result(exception()); | |
658 IRT_END | |
659 | |
660 | |
661 //------------------------------------------------------------------------------------------------------------------------ | |
662 // Invokes | |
663 | |
664 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) | |
665 return method->orig_bytecode_at(method->bci_from(bcp)); | |
666 IRT_END | |
667 | |
668 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) | |
669 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); | |
670 IRT_END | |
671 | |
672 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) | |
673 JvmtiExport::post_raw_breakpoint(thread, method, bcp); | |
674 IRT_END | |
675 | |
676 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) | |
677 // extract receiver from the outgoing argument list if necessary | |
678 Handle receiver(thread, NULL); | |
679 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { | |
680 ResourceMark rm(thread); | |
681 methodHandle m (thread, method(thread)); | |
2142 | 682 Bytecode_invoke call(m, bci(thread)); |
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683 Symbol* signature = call.signature(); |
0 | 684 receiver = Handle(thread, |
685 thread->last_frame().interpreter_callee_receiver(signature)); | |
686 assert(Universe::heap()->is_in_reserved_or_null(receiver()), | |
687 "sanity check"); | |
688 assert(receiver.is_null() || | |
689 Universe::heap()->is_in_reserved(receiver->klass()), | |
690 "sanity check"); | |
691 } | |
692 | |
693 // resolve method | |
694 CallInfo info; | |
695 constantPoolHandle pool(thread, method(thread)->constants()); | |
696 | |
697 { | |
698 JvmtiHideSingleStepping jhss(thread); | |
699 LinkResolver::resolve_invoke(info, receiver, pool, | |
1565 | 700 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
0 | 701 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { |
702 int retry_count = 0; | |
703 while (info.resolved_method()->is_old()) { | |
704 // It is very unlikely that method is redefined more than 100 times | |
705 // in the middle of resolve. If it is looping here more than 100 times | |
706 // means then there could be a bug here. | |
707 guarantee((retry_count++ < 100), | |
708 "Could not resolve to latest version of redefined method"); | |
709 // method is redefined in the middle of resolve so re-try. | |
710 LinkResolver::resolve_invoke(info, receiver, pool, | |
1565 | 711 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
0 | 712 } |
713 } | |
714 } // end JvmtiHideSingleStepping | |
715 | |
716 // check if link resolution caused cpCache to be updated | |
717 if (already_resolved(thread)) return; | |
718 | |
719 if (bytecode == Bytecodes::_invokeinterface) { | |
720 | |
721 if (TraceItables && Verbose) { | |
722 ResourceMark rm(thread); | |
723 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); | |
724 } | |
725 if (info.resolved_method()->method_holder() == | |
1142 | 726 SystemDictionary::Object_klass()) { |
0 | 727 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec |
728 // (see also cpCacheOop.cpp for details) | |
729 methodHandle rm = info.resolved_method(); | |
730 assert(rm->is_final() || info.has_vtable_index(), | |
731 "should have been set already"); | |
732 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); | |
733 } else { | |
734 // Setup itable entry | |
735 int index = klassItable::compute_itable_index(info.resolved_method()()); | |
736 cache_entry(thread)->set_interface_call(info.resolved_method(), index); | |
737 } | |
738 } else { | |
739 cache_entry(thread)->set_method( | |
740 bytecode, | |
741 info.resolved_method(), | |
742 info.vtable_index()); | |
743 } | |
744 IRT_END | |
745 | |
746 | |
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747 // First time execution: Resolve symbols, create a permanent CallSite object. |
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748 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { |
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749 ResourceMark rm(thread); |
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750 |
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751 assert(EnableInvokeDynamic, ""); |
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752 |
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753 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; |
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754 |
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755 methodHandle caller_method(thread, method(thread)); |
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756 |
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757 constantPoolHandle pool(thread, caller_method->constants()); |
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758 pool->set_invokedynamic(); // mark header to flag active call sites |
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759 |
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760 int caller_bci = 0; |
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761 int site_index = 0; |
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762 { address caller_bcp = bcp(thread); |
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763 caller_bci = caller_method->bci_from(caller_bcp); |
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764 site_index = Bytes::get_native_u4(caller_bcp+1); |
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765 } |
2142 | 766 assert(site_index == InterpreterRuntime::bytecode(thread).get_index_u4(bytecode), ""); |
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767 assert(constantPoolCacheOopDesc::is_secondary_index(site_index), "proper format"); |
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768 // there is a second CPC entries that is of interest; it caches signature info: |
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769 int main_index = pool->cache()->secondary_entry_at(site_index)->main_entry_index(); |
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770 int pool_index = pool->cache()->entry_at(main_index)->constant_pool_index(); |
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771 |
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772 // first resolve the signature to a MH.invoke methodOop |
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773 if (!pool->cache()->entry_at(main_index)->is_resolved(bytecode)) { |
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774 JvmtiHideSingleStepping jhss(thread); |
1903 | 775 CallInfo callinfo; |
776 LinkResolver::resolve_invoke(callinfo, Handle(), pool, | |
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777 site_index, bytecode, CHECK); |
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778 // The main entry corresponds to a JVM_CONSTANT_InvokeDynamic, and serves |
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779 // as a common reference point for all invokedynamic call sites with |
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780 // that exact call descriptor. We will link it in the CP cache exactly |
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781 // as if it were an invokevirtual of MethodHandle.invoke. |
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782 pool->cache()->entry_at(main_index)->set_method( |
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783 bytecode, |
1903 | 784 callinfo.resolved_method(), |
785 callinfo.vtable_index()); | |
726
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786 } |
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787 |
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788 // The method (f2 entry) of the main entry is the MH.invoke for the |
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789 // invokedynamic target call signature. |
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790 oop f1_value = pool->cache()->entry_at(main_index)->f1(); |
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791 methodHandle signature_invoker(THREAD, (methodOop) f1_value); |
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792 assert(signature_invoker.not_null() && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(), |
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793 "correct result from LinkResolver::resolve_invokedynamic"); |
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794 |
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795 Handle info; // optional argument(s) in JVM_CONSTANT_InvokeDynamic |
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796 Handle bootm = SystemDictionary::find_bootstrap_method(caller_method, caller_bci, |
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797 main_index, info, CHECK); |
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798 if (!java_lang_invoke_MethodHandle::is_instance(bootm())) { |
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799 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), |
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800 "no bootstrap method found for invokedynamic"); |
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801 } |
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802 |
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803 // Short circuit if CallSite has been bound already: |
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804 if (!pool->cache()->secondary_entry_at(site_index)->is_f1_null()) |
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805 return; |
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806 |
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807 Symbol* call_site_name = pool->name_ref_at(site_index); |
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808 |
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809 Handle call_site |
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810 = SystemDictionary::make_dynamic_call_site(bootm, |
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811 // Callee information: |
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812 call_site_name, |
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813 signature_invoker, |
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814 info, |
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815 // Caller information: |
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816 caller_method, |
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817 caller_bci, |
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818 CHECK); |
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819 |
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820 // In the secondary entry, the f1 field is the call site, and the f2 (index) |
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821 // field is some data about the invoke site. Currently, it is just the BCI. |
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822 // Later, it might be changed to help manage inlining dependencies. |
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823 pool->cache()->secondary_entry_at(site_index)->set_dynamic_call(call_site, signature_invoker); |
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824 } |
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825 IRT_END |
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826 |
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827 |
0 | 828 //------------------------------------------------------------------------------------------------------------------------ |
829 // Miscellaneous | |
830 | |
831 | |
941 | 832 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { |
833 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); | |
834 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); | |
835 if (branch_bcp != NULL && nm != NULL) { | |
836 // This was a successful request for an OSR nmethod. Because | |
837 // frequency_counter_overflow_inner ends with a safepoint check, | |
838 // nm could have been unloaded so look it up again. It's unsafe | |
839 // to examine nm directly since it might have been freed and used | |
840 // for something else. | |
841 frame fr = thread->last_frame(); | |
842 methodOop method = fr.interpreter_frame_method(); | |
843 int bci = method->bci_from(fr.interpreter_frame_bcp()); | |
1783 | 844 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); |
941 | 845 } |
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846 #ifndef PRODUCT |
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847 if (TraceOnStackReplacement) { |
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848 if (nm != NULL) { |
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849 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry()); |
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850 nm->print(); |
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851 } |
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852 } |
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853 #endif |
941 | 854 return nm; |
855 } | |
856 | |
0 | 857 IRT_ENTRY(nmethod*, |
941 | 858 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) |
0 | 859 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
860 // flag, in case this method triggers classloading which will call into Java. | |
861 UnlockFlagSaver fs(thread); | |
862 | |
863 frame fr = thread->last_frame(); | |
864 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
865 methodHandle method(thread, fr.interpreter_frame_method()); | |
1783 | 866 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; |
867 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; | |
868 | |
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869 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); |
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870 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); |
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871 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); |
0 | 872 |
1783 | 873 if (osr_nm != NULL) { |
874 // We may need to do on-stack replacement which requires that no | |
875 // monitors in the activation are biased because their | |
876 // BasicObjectLocks will need to migrate during OSR. Force | |
877 // unbiasing of all monitors in the activation now (even though | |
878 // the OSR nmethod might be invalidated) because we don't have a | |
879 // safepoint opportunity later once the migration begins. | |
880 if (UseBiasedLocking) { | |
881 ResourceMark rm; | |
882 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
883 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
884 kptr < fr.interpreter_frame_monitor_begin(); | |
885 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
886 if( kptr->obj() != NULL ) { | |
887 objects_to_revoke->append(Handle(THREAD, kptr->obj())); | |
888 } | |
0 | 889 } |
1783 | 890 BiasedLocking::revoke(objects_to_revoke); |
0 | 891 } |
892 } | |
1783 | 893 return osr_nm; |
0 | 894 IRT_END |
895 | |
896 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) | |
897 assert(ProfileInterpreter, "must be profiling interpreter"); | |
898 int bci = method->bci_from(cur_bcp); | |
899 methodDataOop mdo = method->method_data(); | |
900 if (mdo == NULL) return 0; | |
901 return mdo->bci_to_di(bci); | |
902 IRT_END | |
903 | |
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904 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) |
0 | 905 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
906 // flag, in case this method triggers classloading which will call into Java. | |
907 UnlockFlagSaver fs(thread); | |
908 | |
909 assert(ProfileInterpreter, "must be profiling interpreter"); | |
910 frame fr = thread->last_frame(); | |
911 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
912 methodHandle method(thread, fr.interpreter_frame_method()); | |
913 methodOopDesc::build_interpreter_method_data(method, THREAD); | |
914 if (HAS_PENDING_EXCEPTION) { | |
915 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
916 CLEAR_PENDING_EXCEPTION; | |
917 // and fall through... | |
918 } | |
919 IRT_END | |
920 | |
921 | |
922 #ifdef ASSERT | |
923 IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) | |
924 assert(ProfileInterpreter, "must be profiling interpreter"); | |
925 | |
926 methodDataOop mdo = method->method_data(); | |
927 assert(mdo != NULL, "must not be null"); | |
928 | |
929 int bci = method->bci_from(bcp); | |
930 | |
931 address mdp2 = mdo->bci_to_dp(bci); | |
932 if (mdp != mdp2) { | |
933 ResourceMark rm; | |
934 ResetNoHandleMark rnm; // In a LEAF entry. | |
935 HandleMark hm; | |
936 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); | |
937 int current_di = mdo->dp_to_di(mdp); | |
938 int expected_di = mdo->dp_to_di(mdp2); | |
939 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); | |
940 int expected_approx_bci = mdo->data_at(expected_di)->bci(); | |
941 int approx_bci = -1; | |
942 if (current_di >= 0) { | |
943 approx_bci = mdo->data_at(current_di)->bci(); | |
944 } | |
945 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); | |
946 mdo->print_on(tty); | |
947 method->print_codes(); | |
948 } | |
949 assert(mdp == mdp2, "wrong mdp"); | |
950 IRT_END | |
951 #endif // ASSERT | |
952 | |
953 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) | |
954 assert(ProfileInterpreter, "must be profiling interpreter"); | |
955 ResourceMark rm(thread); | |
956 HandleMark hm(thread); | |
957 frame fr = thread->last_frame(); | |
958 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
959 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); | |
960 | |
961 // Grab a lock to ensure atomic access to setting the return bci and | |
962 // the displacement. This can block and GC, invalidating all naked oops. | |
963 MutexLocker ml(RetData_lock); | |
964 | |
965 // ProfileData is essentially a wrapper around a derived oop, so we | |
966 // need to take the lock before making any ProfileData structures. | |
967 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); | |
968 RetData* rdata = data->as_RetData(); | |
969 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); | |
970 fr.interpreter_frame_set_mdp(new_mdp); | |
971 IRT_END | |
972 | |
973 | |
974 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) | |
975 // We used to need an explict preserve_arguments here for invoke bytecodes. However, | |
976 // stack traversal automatically takes care of preserving arguments for invoke, so | |
977 // this is no longer needed. | |
978 | |
979 // IRT_END does an implicit safepoint check, hence we are guaranteed to block | |
980 // if this is called during a safepoint | |
981 | |
982 if (JvmtiExport::should_post_single_step()) { | |
983 // We are called during regular safepoints and when the VM is | |
984 // single stepping. If any thread is marked for single stepping, | |
985 // then we may have JVMTI work to do. | |
986 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); | |
987 } | |
988 IRT_END | |
989 | |
990 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, | |
991 ConstantPoolCacheEntry *cp_entry)) | |
992 | |
993 // check the access_flags for the field in the klass | |
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994 |
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995 instanceKlass* ik = instanceKlass::cast(java_lang_Class::as_klassOop(cp_entry->f1())); |
0 | 996 int index = cp_entry->field_index(); |
3938 | 997 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; |
0 | 998 |
999 switch(cp_entry->flag_state()) { | |
1000 case btos: // fall through | |
1001 case ctos: // fall through | |
1002 case stos: // fall through | |
1003 case itos: // fall through | |
1004 case ftos: // fall through | |
1005 case ltos: // fall through | |
1006 case dtos: // fall through | |
1007 case atos: break; | |
1008 default: ShouldNotReachHere(); return; | |
1009 } | |
1010 bool is_static = (obj == NULL); | |
1011 HandleMark hm(thread); | |
1012 | |
1013 Handle h_obj; | |
1014 if (!is_static) { | |
1015 // non-static field accessors have an object, but we need a handle | |
1016 h_obj = Handle(thread, obj); | |
1017 } | |
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1018 instanceKlassHandle h_cp_entry_f1(thread, java_lang_Class::as_klassOop(cp_entry->f1())); |
0 | 1019 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); |
1020 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); | |
1021 IRT_END | |
1022 | |
1023 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, | |
1024 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) | |
1025 | |
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1026 klassOop k = java_lang_Class::as_klassOop(cp_entry->f1()); |
0 | 1027 |
1028 // check the access_flags for the field in the klass | |
1029 instanceKlass* ik = instanceKlass::cast(k); | |
1030 int index = cp_entry->field_index(); | |
1031 // bail out if field modifications are not watched | |
3938 | 1032 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; |
0 | 1033 |
1034 char sig_type = '\0'; | |
1035 | |
1036 switch(cp_entry->flag_state()) { | |
1037 case btos: sig_type = 'Z'; break; | |
1038 case ctos: sig_type = 'C'; break; | |
1039 case stos: sig_type = 'S'; break; | |
1040 case itos: sig_type = 'I'; break; | |
1041 case ftos: sig_type = 'F'; break; | |
1042 case atos: sig_type = 'L'; break; | |
1043 case ltos: sig_type = 'J'; break; | |
1044 case dtos: sig_type = 'D'; break; | |
1045 default: ShouldNotReachHere(); return; | |
1046 } | |
1047 bool is_static = (obj == NULL); | |
1048 | |
1049 HandleMark hm(thread); | |
1050 instanceKlassHandle h_klass(thread, k); | |
1051 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static); | |
1052 jvalue fvalue; | |
1053 #ifdef _LP64 | |
1054 fvalue = *value; | |
1055 #else | |
1056 // Long/double values are stored unaligned and also noncontiguously with | |
1057 // tagged stacks. We can't just do a simple assignment even in the non- | |
1058 // J/D cases because a C++ compiler is allowed to assume that a jvalue is | |
1059 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. | |
1060 // We assume that the two halves of longs/doubles are stored in interpreter | |
1061 // stack slots in platform-endian order. | |
1062 jlong_accessor u; | |
1063 jint* newval = (jint*)value; | |
1064 u.words[0] = newval[0]; | |
1506 | 1065 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag |
0 | 1066 fvalue.j = u.long_value; |
1067 #endif // _LP64 | |
1068 | |
1069 Handle h_obj; | |
1070 if (!is_static) { | |
1071 // non-static field accessors have an object, but we need a handle | |
1072 h_obj = Handle(thread, obj); | |
1073 } | |
1074 | |
1075 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, | |
1076 fid, sig_type, &fvalue); | |
1077 IRT_END | |
1078 | |
1079 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) | |
1080 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); | |
1081 IRT_END | |
1082 | |
1083 | |
1084 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) | |
1085 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); | |
1086 IRT_END | |
1087 | |
1088 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) | |
1089 { | |
1090 return (Interpreter::contains(pc) ? 1 : 0); | |
1091 } | |
1092 IRT_END | |
1093 | |
1094 | |
1095 // Implementation of SignatureHandlerLibrary | |
1096 | |
1097 address SignatureHandlerLibrary::set_handler_blob() { | |
1098 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); | |
1099 if (handler_blob == NULL) { | |
1100 return NULL; | |
1101 } | |
1748 | 1102 address handler = handler_blob->code_begin(); |
0 | 1103 _handler_blob = handler_blob; |
1104 _handler = handler; | |
1105 return handler; | |
1106 } | |
1107 | |
1108 void SignatureHandlerLibrary::initialize() { | |
1109 if (_fingerprints != NULL) { | |
1110 return; | |
1111 } | |
1112 if (set_handler_blob() == NULL) { | |
1113 vm_exit_out_of_memory(blob_size, "native signature handlers"); | |
1114 } | |
1115 | |
1116 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", | |
1117 SignatureHandlerLibrary::buffer_size); | |
1748 | 1118 _buffer = bb->code_begin(); |
0 | 1119 |
6197 | 1120 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); |
1121 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); | |
0 | 1122 } |
1123 | |
1124 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { | |
1125 address handler = _handler; | |
1748 | 1126 int insts_size = buffer->pure_insts_size(); |
1127 if (handler + insts_size > _handler_blob->code_end()) { | |
0 | 1128 // get a new handler blob |
1129 handler = set_handler_blob(); | |
1130 } | |
1131 if (handler != NULL) { | |
1748 | 1132 memcpy(handler, buffer->insts_begin(), insts_size); |
0 | 1133 pd_set_handler(handler); |
1748 | 1134 ICache::invalidate_range(handler, insts_size); |
1135 _handler = handler + insts_size; | |
0 | 1136 } |
1137 return handler; | |
1138 } | |
1139 | |
1140 void SignatureHandlerLibrary::add(methodHandle method) { | |
1141 if (method->signature_handler() == NULL) { | |
1142 // use slow signature handler if we can't do better | |
1143 int handler_index = -1; | |
1144 // check if we can use customized (fast) signature handler | |
1145 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { | |
1146 // use customized signature handler | |
1147 MutexLocker mu(SignatureHandlerLibrary_lock); | |
1148 // make sure data structure is initialized | |
1149 initialize(); | |
1150 // lookup method signature's fingerprint | |
1151 uint64_t fingerprint = Fingerprinter(method).fingerprint(); | |
1152 handler_index = _fingerprints->find(fingerprint); | |
1153 // create handler if necessary | |
1154 if (handler_index < 0) { | |
1155 ResourceMark rm; | |
1156 ptrdiff_t align_offset = (address) | |
1157 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; | |
1158 CodeBuffer buffer((address)(_buffer + align_offset), | |
1159 SignatureHandlerLibrary::buffer_size - align_offset); | |
1160 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); | |
1161 // copy into code heap | |
1162 address handler = set_handler(&buffer); | |
1163 if (handler == NULL) { | |
1164 // use slow signature handler | |
1165 } else { | |
1166 // debugging suppport | |
1167 if (PrintSignatureHandlers) { | |
1168 tty->cr(); | |
1169 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", | |
1170 _handlers->length(), | |
1171 (method->is_static() ? "static" : "receiver"), | |
1172 method->name_and_sig_as_C_string(), | |
1173 fingerprint, | |
1748 | 1174 buffer.insts_size()); |
1175 Disassembler::decode(handler, handler + buffer.insts_size()); | |
0 | 1176 #ifndef PRODUCT |
1177 tty->print_cr(" --- associated result handler ---"); | |
1178 address rh_begin = Interpreter::result_handler(method()->result_type()); | |
1179 address rh_end = rh_begin; | |
1180 while (*(int*)rh_end != 0) { | |
1181 rh_end += sizeof(int); | |
1182 } | |
1183 Disassembler::decode(rh_begin, rh_end); | |
1184 #endif | |
1185 } | |
1186 // add handler to library | |
1187 _fingerprints->append(fingerprint); | |
1188 _handlers->append(handler); | |
1189 // set handler index | |
1190 assert(_fingerprints->length() == _handlers->length(), "sanity check"); | |
1191 handler_index = _fingerprints->length() - 1; | |
1192 } | |
1193 } | |
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1194 // Set handler under SignatureHandlerLibrary_lock |
0 | 1195 if (handler_index < 0) { |
1196 // use generic signature handler | |
1197 method->set_signature_handler(Interpreter::slow_signature_handler()); | |
1198 } else { | |
1199 // set handler | |
1200 method->set_signature_handler(_handlers->at(handler_index)); | |
1201 } | |
2194
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1202 } else { |
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1203 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
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1204 // use generic signature handler |
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1205 method->set_signature_handler(Interpreter::slow_signature_handler()); |
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1206 } |
0 | 1207 } |
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1208 #ifdef ASSERT |
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1209 int handler_index = -1; |
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1210 int fingerprint_index = -2; |
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1211 { |
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1212 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized |
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1213 // in any way if accessed from multiple threads. To avoid races with another |
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1214 // thread which may change the arrays in the above, mutex protected block, we |
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1215 // have to protect this read access here with the same mutex as well! |
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1216 MutexLocker mu(SignatureHandlerLibrary_lock); |
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1217 if (_handlers != NULL) { |
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1218 handler_index = _handlers->find(method->signature_handler()); |
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1219 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); |
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1220 } |
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1221 } |
0 | 1222 assert(method->signature_handler() == Interpreter::slow_signature_handler() || |
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1223 handler_index == fingerprint_index, "sanity check"); |
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1224 #endif // ASSERT |
0 | 1225 } |
1226 | |
1227 | |
1228 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; | |
1229 address SignatureHandlerLibrary::_handler = NULL; | |
1230 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; | |
1231 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; | |
1232 address SignatureHandlerLibrary::_buffer = NULL; | |
1233 | |
1234 | |
1235 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method)) | |
1236 methodHandle m(thread, method); | |
1237 assert(m->is_native(), "sanity check"); | |
1238 // lookup native function entry point if it doesn't exist | |
1239 bool in_base_library; | |
1240 if (!m->has_native_function()) { | |
1241 NativeLookup::lookup(m, in_base_library, CHECK); | |
1242 } | |
1243 // make sure signature handler is installed | |
1244 SignatureHandlerLibrary::add(m); | |
1245 // The interpreter entry point checks the signature handler first, | |
1246 // before trying to fetch the native entry point and klass mirror. | |
1247 // We must set the signature handler last, so that multiple processors | |
1248 // preparing the same method will be sure to see non-null entry & mirror. | |
1249 IRT_END | |
1250 | |
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1251 #if defined(IA32) || defined(AMD64) || defined(ARM) |
0 | 1252 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) |
1253 if (src_address == dest_address) { | |
1254 return; | |
1255 } | |
1256 ResetNoHandleMark rnm; // In a LEAF entry. | |
1257 HandleMark hm; | |
1258 ResourceMark rm; | |
1259 frame fr = thread->last_frame(); | |
1260 assert(fr.is_interpreted_frame(), ""); | |
1261 jint bci = fr.interpreter_frame_bci(); | |
1262 methodHandle mh(thread, fr.interpreter_frame_method()); | |
2142 | 1263 Bytecode_invoke invoke(mh, bci); |
1264 ArgumentSizeComputer asc(invoke.signature()); | |
1265 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver | |
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1266 Copy::conjoint_jbytes(src_address, dest_address, |
1506 | 1267 size_of_arguments * Interpreter::stackElementSize); |
0 | 1268 IRT_END |
1269 #endif |