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annotate src/share/vm/interpreter/interpreterRuntime.cpp @ 3756:c8f2186acf6d
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Reviewed-by: iveresov, never
author | twisti |
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date | Tue, 14 Jun 2011 12:25:05 -0700 |
parents | 7db2b9499c36 |
children | 38fa55e5e792 |
rev | line source |
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0 | 1 /* |
2142 | 2 * Copyright (c) 1997, 2011, 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 | |
710 | 365 // required can be either a MethodType, or a Class (for a single argument) |
366 // actual (if not null) can be either a MethodHandle, or an arbitrary value (for a single argument) | |
367 IRT_ENTRY(void, InterpreterRuntime::throw_WrongMethodTypeException(JavaThread* thread, | |
368 oopDesc* required, | |
369 oopDesc* actual)) { | |
370 ResourceMark rm(thread); | |
371 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual); | |
372 | |
373 if (ProfileTraps) { | |
374 note_trap(thread, Deoptimization::Reason_constraint, CHECK); | |
375 } | |
376 | |
377 // create exception | |
2460 | 378 THROW_MSG(vmSymbols::java_lang_invoke_WrongMethodTypeException(), message); |
710 | 379 } |
380 IRT_END | |
381 | |
382 | |
0 | 383 |
384 // exception_handler_for_exception(...) returns the continuation address, | |
385 // the exception oop (via TLS) and sets the bci/bcp for the continuation. | |
386 // The exception oop is returned to make sure it is preserved over GC (it | |
387 // is only on the stack if the exception was thrown explicitly via athrow). | |
388 // During this operation, the expression stack contains the values for the | |
389 // bci where the exception happened. If the exception was propagated back | |
390 // from a call, the expression stack contains the values for the bci at the | |
391 // invoke w/o arguments (i.e., as if one were inside the call). | |
392 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) | |
393 | |
394 Handle h_exception(thread, exception); | |
395 methodHandle h_method (thread, method(thread)); | |
396 constantPoolHandle h_constants(thread, h_method->constants()); | |
397 typeArrayHandle h_extable (thread, h_method->exception_table()); | |
398 bool should_repeat; | |
399 int handler_bci; | |
1602 | 400 int current_bci = bci(thread); |
0 | 401 |
402 // Need to do this check first since when _do_not_unlock_if_synchronized | |
403 // is set, we don't want to trigger any classloading which may make calls | |
404 // into java, or surprisingly find a matching exception handler for bci 0 | |
405 // since at this moment the method hasn't been "officially" entered yet. | |
406 if (thread->do_not_unlock_if_synchronized()) { | |
407 ResourceMark rm; | |
408 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); | |
409 thread->set_vm_result(exception); | |
410 #ifdef CC_INTERP | |
411 return (address) -1; | |
412 #else | |
413 return Interpreter::remove_activation_entry(); | |
414 #endif | |
415 } | |
416 | |
417 do { | |
418 should_repeat = false; | |
419 | |
420 // assertions | |
421 #ifdef ASSERT | |
422 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); | |
423 assert(h_exception->is_oop(), "just checking"); | |
424 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError | |
1142 | 425 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { |
0 | 426 if (ExitVMOnVerifyError) vm_exit(-1); |
427 ShouldNotReachHere(); | |
428 } | |
429 #endif | |
430 | |
431 // tracing | |
432 if (TraceExceptions) { | |
433 ttyLocker ttyl; | |
434 ResourceMark rm(thread); | |
435 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); | |
436 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); | |
437 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); | |
438 } | |
439 // Don't go paging in something which won't be used. | |
440 // else if (h_extable->length() == 0) { | |
441 // // disabled for now - interpreter is not using shortcut yet | |
442 // // (shortcut is not to call runtime if we have no exception handlers) | |
443 // // warning("performance bug: should not call runtime if method has no exception handlers"); | |
444 // } | |
445 // for AbortVMOnException flag | |
446 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); | |
447 | |
448 // exception handler lookup | |
449 KlassHandle h_klass(THREAD, h_exception->klass()); | |
450 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); | |
451 if (HAS_PENDING_EXCEPTION) { | |
452 // We threw an exception while trying to find the exception handler. | |
453 // Transfer the new exception to the exception handle which will | |
454 // be set into thread local storage, and do another lookup for an | |
455 // exception handler for this exception, this time starting at the | |
456 // BCI of the exception handler which caused the exception to be | |
457 // thrown (bug 4307310). | |
458 h_exception = Handle(THREAD, PENDING_EXCEPTION); | |
459 CLEAR_PENDING_EXCEPTION; | |
460 if (handler_bci >= 0) { | |
461 current_bci = handler_bci; | |
462 should_repeat = true; | |
463 } | |
464 } | |
465 } while (should_repeat == true); | |
466 | |
467 // notify JVMTI of an exception throw; JVMTI will detect if this is a first | |
468 // time throw or a stack unwinding throw and accordingly notify the debugger | |
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469 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 470 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); |
471 } | |
472 | |
473 #ifdef CC_INTERP | |
474 address continuation = (address)(intptr_t) handler_bci; | |
475 #else | |
476 address continuation = NULL; | |
477 #endif | |
478 address handler_pc = NULL; | |
479 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { | |
480 // Forward exception to callee (leaving bci/bcp untouched) because (a) no | |
481 // handler in this method, or (b) after a stack overflow there is not yet | |
482 // enough stack space available to reprotect the stack. | |
483 #ifndef CC_INTERP | |
484 continuation = Interpreter::remove_activation_entry(); | |
485 #endif | |
486 // Count this for compilation purposes | |
487 h_method->interpreter_throwout_increment(); | |
488 } else { | |
489 // handler in this method => change bci/bcp to handler bci/bcp and continue there | |
490 handler_pc = h_method->code_base() + handler_bci; | |
491 #ifndef CC_INTERP | |
492 set_bcp_and_mdp(handler_pc, thread); | |
493 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; | |
494 #endif | |
495 } | |
496 // notify debugger of an exception catch | |
497 // (this is good for exceptions caught in native methods as well) | |
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498 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 499 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); |
500 } | |
501 | |
502 thread->set_vm_result(h_exception()); | |
503 return continuation; | |
504 IRT_END | |
505 | |
506 | |
507 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) | |
508 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); | |
509 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) | |
510 IRT_END | |
511 | |
512 | |
513 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
514 THROW(vmSymbols::java_lang_AbstractMethodError()); | |
515 IRT_END | |
516 | |
517 | |
518 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) | |
519 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); | |
520 IRT_END | |
521 | |
522 | |
523 //------------------------------------------------------------------------------------------------------------------------ | |
524 // Fields | |
525 // | |
526 | |
527 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) | |
528 // resolve field | |
529 FieldAccessInfo info; | |
530 constantPoolHandle pool(thread, method(thread)->constants()); | |
531 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); | |
532 | |
533 { | |
534 JvmtiHideSingleStepping jhss(thread); | |
1565 | 535 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode), |
0 | 536 bytecode, false, CHECK); |
537 } // end JvmtiHideSingleStepping | |
538 | |
539 // check if link resolution caused cpCache to be updated | |
540 if (already_resolved(thread)) return; | |
541 | |
542 // compute auxiliary field attributes | |
543 TosState state = as_TosState(info.field_type()); | |
544 | |
545 // We need to delay resolving put instructions on final fields | |
546 // until we actually invoke one. This is required so we throw | |
547 // exceptions at the correct place. If we do not resolve completely | |
548 // in the current pass, leaving the put_code set to zero will | |
549 // cause the next put instruction to reresolve. | |
550 bool is_put = (bytecode == Bytecodes::_putfield || | |
551 bytecode == Bytecodes::_putstatic); | |
552 Bytecodes::Code put_code = (Bytecodes::Code)0; | |
553 | |
554 // We also need to delay resolving getstatic instructions until the | |
555 // class is intitialized. This is required so that access to the static | |
556 // field will call the initialization function every time until the class | |
557 // is completely initialized ala. in 2.17.5 in JVM Specification. | |
558 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); | |
559 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && | |
560 !klass->is_initialized()); | |
561 Bytecodes::Code get_code = (Bytecodes::Code)0; | |
562 | |
563 | |
564 if (!uninitialized_static) { | |
565 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); | |
566 if (is_put || !info.access_flags().is_final()) { | |
567 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); | |
568 } | |
569 } | |
570 | |
571 cache_entry(thread)->set_field( | |
572 get_code, | |
573 put_code, | |
574 info.klass(), | |
575 info.field_index(), | |
576 info.field_offset(), | |
577 state, | |
578 info.access_flags().is_final(), | |
579 info.access_flags().is_volatile() | |
580 ); | |
581 IRT_END | |
582 | |
583 | |
584 //------------------------------------------------------------------------------------------------------------------------ | |
585 // Synchronization | |
586 // | |
587 // The interpreter's synchronization code is factored out so that it can | |
588 // be shared by method invocation and synchronized blocks. | |
589 //%note synchronization_3 | |
590 | |
591 static void trace_locking(Handle& h_locking_obj, bool is_locking) { | |
592 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); | |
593 } | |
594 | |
595 | |
596 //%note monitor_1 | |
597 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) | |
598 #ifdef ASSERT | |
599 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
600 #endif | |
601 if (PrintBiasedLockingStatistics) { | |
602 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
603 } | |
604 Handle h_obj(thread, elem->obj()); | |
605 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
606 "must be NULL or an object"); | |
607 if (UseBiasedLocking) { | |
608 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
609 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); | |
610 } else { | |
611 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); | |
612 } | |
613 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), | |
614 "must be NULL or an object"); | |
615 #ifdef ASSERT | |
616 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
617 #endif | |
618 IRT_END | |
619 | |
620 | |
621 //%note monitor_1 | |
622 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) | |
623 #ifdef ASSERT | |
624 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
625 #endif | |
626 Handle h_obj(thread, elem->obj()); | |
627 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
628 "must be NULL or an object"); | |
629 if (elem == NULL || h_obj()->is_unlocked()) { | |
630 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
631 } | |
632 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); | |
633 // Free entry. This must be done here, since a pending exception might be installed on | |
634 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. | |
635 elem->set_obj(NULL); | |
636 #ifdef ASSERT | |
637 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
638 #endif | |
639 IRT_END | |
640 | |
641 | |
642 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) | |
643 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
644 IRT_END | |
645 | |
646 | |
647 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) | |
648 // Returns an illegal exception to install into the current thread. The | |
649 // pending_exception flag is cleared so normal exception handling does not | |
650 // trigger. Any current installed exception will be overwritten. This | |
651 // method will be called during an exception unwind. | |
652 | |
653 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); | |
654 Handle exception(thread, thread->vm_result()); | |
655 assert(exception() != NULL, "vm result should be set"); | |
656 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) | |
1142 | 657 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 658 exception = get_preinitialized_exception( |
659 SystemDictionary::IllegalMonitorStateException_klass(), | |
660 CATCH); | |
661 } | |
662 thread->set_vm_result(exception()); | |
663 IRT_END | |
664 | |
665 | |
666 //------------------------------------------------------------------------------------------------------------------------ | |
667 // Invokes | |
668 | |
669 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) | |
670 return method->orig_bytecode_at(method->bci_from(bcp)); | |
671 IRT_END | |
672 | |
673 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) | |
674 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); | |
675 IRT_END | |
676 | |
677 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) | |
678 JvmtiExport::post_raw_breakpoint(thread, method, bcp); | |
679 IRT_END | |
680 | |
681 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) | |
682 // extract receiver from the outgoing argument list if necessary | |
683 Handle receiver(thread, NULL); | |
684 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { | |
685 ResourceMark rm(thread); | |
686 methodHandle m (thread, method(thread)); | |
2142 | 687 Bytecode_invoke call(m, bci(thread)); |
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688 Symbol* signature = call.signature(); |
0 | 689 receiver = Handle(thread, |
690 thread->last_frame().interpreter_callee_receiver(signature)); | |
691 assert(Universe::heap()->is_in_reserved_or_null(receiver()), | |
692 "sanity check"); | |
693 assert(receiver.is_null() || | |
694 Universe::heap()->is_in_reserved(receiver->klass()), | |
695 "sanity check"); | |
696 } | |
697 | |
698 // resolve method | |
699 CallInfo info; | |
700 constantPoolHandle pool(thread, method(thread)->constants()); | |
701 | |
702 { | |
703 JvmtiHideSingleStepping jhss(thread); | |
704 LinkResolver::resolve_invoke(info, receiver, pool, | |
1565 | 705 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
0 | 706 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { |
707 int retry_count = 0; | |
708 while (info.resolved_method()->is_old()) { | |
709 // It is very unlikely that method is redefined more than 100 times | |
710 // in the middle of resolve. If it is looping here more than 100 times | |
711 // means then there could be a bug here. | |
712 guarantee((retry_count++ < 100), | |
713 "Could not resolve to latest version of redefined method"); | |
714 // method is redefined in the middle of resolve so re-try. | |
715 LinkResolver::resolve_invoke(info, receiver, pool, | |
1565 | 716 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
0 | 717 } |
718 } | |
719 } // end JvmtiHideSingleStepping | |
720 | |
721 // check if link resolution caused cpCache to be updated | |
722 if (already_resolved(thread)) return; | |
723 | |
724 if (bytecode == Bytecodes::_invokeinterface) { | |
725 | |
726 if (TraceItables && Verbose) { | |
727 ResourceMark rm(thread); | |
728 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); | |
729 } | |
730 if (info.resolved_method()->method_holder() == | |
1142 | 731 SystemDictionary::Object_klass()) { |
0 | 732 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec |
733 // (see also cpCacheOop.cpp for details) | |
734 methodHandle rm = info.resolved_method(); | |
735 assert(rm->is_final() || info.has_vtable_index(), | |
736 "should have been set already"); | |
737 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); | |
738 } else { | |
739 // Setup itable entry | |
740 int index = klassItable::compute_itable_index(info.resolved_method()()); | |
741 cache_entry(thread)->set_interface_call(info.resolved_method(), index); | |
742 } | |
743 } else { | |
744 cache_entry(thread)->set_method( | |
745 bytecode, | |
746 info.resolved_method(), | |
747 info.vtable_index()); | |
748 } | |
749 IRT_END | |
750 | |
751 | |
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752 // First time execution: Resolve symbols, create a permanent CallSite object. |
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753 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { |
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754 ResourceMark rm(thread); |
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755 |
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756 assert(EnableInvokeDynamic, ""); |
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757 |
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758 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; |
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759 |
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760 methodHandle caller_method(thread, method(thread)); |
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761 |
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762 constantPoolHandle pool(thread, caller_method->constants()); |
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763 pool->set_invokedynamic(); // mark header to flag active call sites |
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764 |
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765 int caller_bci = 0; |
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766 int site_index = 0; |
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767 { address caller_bcp = bcp(thread); |
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768 caller_bci = caller_method->bci_from(caller_bcp); |
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769 site_index = Bytes::get_native_u4(caller_bcp+1); |
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770 } |
2142 | 771 assert(site_index == InterpreterRuntime::bytecode(thread).get_index_u4(bytecode), ""); |
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772 assert(constantPoolCacheOopDesc::is_secondary_index(site_index), "proper format"); |
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773 // there is a second CPC entries that is of interest; it caches signature info: |
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774 int main_index = pool->cache()->secondary_entry_at(site_index)->main_entry_index(); |
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775 int pool_index = pool->cache()->entry_at(main_index)->constant_pool_index(); |
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776 |
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777 // first resolve the signature to a MH.invoke methodOop |
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778 if (!pool->cache()->entry_at(main_index)->is_resolved(bytecode)) { |
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779 JvmtiHideSingleStepping jhss(thread); |
1903 | 780 CallInfo callinfo; |
781 LinkResolver::resolve_invoke(callinfo, Handle(), pool, | |
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782 site_index, bytecode, CHECK); |
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783 // The main entry corresponds to a JVM_CONSTANT_InvokeDynamic, and serves |
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784 // as a common reference point for all invokedynamic call sites with |
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785 // that exact call descriptor. We will link it in the CP cache exactly |
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786 // as if it were an invokevirtual of MethodHandle.invoke. |
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787 pool->cache()->entry_at(main_index)->set_method( |
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788 bytecode, |
1903 | 789 callinfo.resolved_method(), |
790 callinfo.vtable_index()); | |
726
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791 } |
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792 |
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793 // The method (f2 entry) of the main entry is the MH.invoke for the |
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794 // invokedynamic target call signature. |
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795 oop f1_value = pool->cache()->entry_at(main_index)->f1(); |
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796 methodHandle signature_invoker(THREAD, (methodOop) f1_value); |
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797 assert(signature_invoker.not_null() && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(), |
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798 "correct result from LinkResolver::resolve_invokedynamic"); |
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799 |
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800 Handle info; // optional argument(s) in JVM_CONSTANT_InvokeDynamic |
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801 Handle bootm = SystemDictionary::find_bootstrap_method(caller_method, caller_bci, |
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802 main_index, info, CHECK); |
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803 if (!java_lang_invoke_MethodHandle::is_instance(bootm())) { |
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804 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), |
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805 "no bootstrap method found for invokedynamic"); |
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806 } |
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807 |
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808 // Short circuit if CallSite has been bound already: |
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809 if (!pool->cache()->secondary_entry_at(site_index)->is_f1_null()) |
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810 return; |
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811 |
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812 Symbol* call_site_name = pool->name_ref_at(site_index); |
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813 |
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814 Handle call_site |
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815 = SystemDictionary::make_dynamic_call_site(bootm, |
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816 // Callee information: |
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817 call_site_name, |
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818 signature_invoker, |
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819 info, |
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820 // Caller information: |
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821 caller_method, |
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822 caller_bci, |
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823 CHECK); |
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824 |
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825 // In the secondary entry, the f1 field is the call site, and the f2 (index) |
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826 // field is some data about the invoke site. Currently, it is just the BCI. |
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827 // Later, it might be changed to help manage inlining dependencies. |
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828 pool->cache()->secondary_entry_at(site_index)->set_dynamic_call(call_site, signature_invoker); |
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829 } |
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830 IRT_END |
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831 |
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832 |
0 | 833 //------------------------------------------------------------------------------------------------------------------------ |
834 // Miscellaneous | |
835 | |
836 | |
941 | 837 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { |
838 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); | |
839 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); | |
840 if (branch_bcp != NULL && nm != NULL) { | |
841 // This was a successful request for an OSR nmethod. Because | |
842 // frequency_counter_overflow_inner ends with a safepoint check, | |
843 // nm could have been unloaded so look it up again. It's unsafe | |
844 // to examine nm directly since it might have been freed and used | |
845 // for something else. | |
846 frame fr = thread->last_frame(); | |
847 methodOop method = fr.interpreter_frame_method(); | |
848 int bci = method->bci_from(fr.interpreter_frame_bcp()); | |
1783 | 849 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); |
941 | 850 } |
851 return nm; | |
852 } | |
853 | |
0 | 854 IRT_ENTRY(nmethod*, |
941 | 855 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) |
0 | 856 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
857 // flag, in case this method triggers classloading which will call into Java. | |
858 UnlockFlagSaver fs(thread); | |
859 | |
860 frame fr = thread->last_frame(); | |
861 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
862 methodHandle method(thread, fr.interpreter_frame_method()); | |
1783 | 863 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; |
864 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; | |
865 | |
866 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, thread); | |
0 | 867 |
1783 | 868 if (osr_nm != NULL) { |
869 // We may need to do on-stack replacement which requires that no | |
870 // monitors in the activation are biased because their | |
871 // BasicObjectLocks will need to migrate during OSR. Force | |
872 // unbiasing of all monitors in the activation now (even though | |
873 // the OSR nmethod might be invalidated) because we don't have a | |
874 // safepoint opportunity later once the migration begins. | |
875 if (UseBiasedLocking) { | |
876 ResourceMark rm; | |
877 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
878 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
879 kptr < fr.interpreter_frame_monitor_begin(); | |
880 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
881 if( kptr->obj() != NULL ) { | |
882 objects_to_revoke->append(Handle(THREAD, kptr->obj())); | |
883 } | |
0 | 884 } |
1783 | 885 BiasedLocking::revoke(objects_to_revoke); |
0 | 886 } |
887 } | |
1783 | 888 return osr_nm; |
0 | 889 IRT_END |
890 | |
891 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) | |
892 assert(ProfileInterpreter, "must be profiling interpreter"); | |
893 int bci = method->bci_from(cur_bcp); | |
894 methodDataOop mdo = method->method_data(); | |
895 if (mdo == NULL) return 0; | |
896 return mdo->bci_to_di(bci); | |
897 IRT_END | |
898 | |
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899 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) |
0 | 900 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
901 // flag, in case this method triggers classloading which will call into Java. | |
902 UnlockFlagSaver fs(thread); | |
903 | |
904 assert(ProfileInterpreter, "must be profiling interpreter"); | |
905 frame fr = thread->last_frame(); | |
906 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
907 methodHandle method(thread, fr.interpreter_frame_method()); | |
908 methodOopDesc::build_interpreter_method_data(method, THREAD); | |
909 if (HAS_PENDING_EXCEPTION) { | |
910 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
911 CLEAR_PENDING_EXCEPTION; | |
912 // and fall through... | |
913 } | |
914 IRT_END | |
915 | |
916 | |
917 #ifdef ASSERT | |
918 IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) | |
919 assert(ProfileInterpreter, "must be profiling interpreter"); | |
920 | |
921 methodDataOop mdo = method->method_data(); | |
922 assert(mdo != NULL, "must not be null"); | |
923 | |
924 int bci = method->bci_from(bcp); | |
925 | |
926 address mdp2 = mdo->bci_to_dp(bci); | |
927 if (mdp != mdp2) { | |
928 ResourceMark rm; | |
929 ResetNoHandleMark rnm; // In a LEAF entry. | |
930 HandleMark hm; | |
931 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); | |
932 int current_di = mdo->dp_to_di(mdp); | |
933 int expected_di = mdo->dp_to_di(mdp2); | |
934 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); | |
935 int expected_approx_bci = mdo->data_at(expected_di)->bci(); | |
936 int approx_bci = -1; | |
937 if (current_di >= 0) { | |
938 approx_bci = mdo->data_at(current_di)->bci(); | |
939 } | |
940 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); | |
941 mdo->print_on(tty); | |
942 method->print_codes(); | |
943 } | |
944 assert(mdp == mdp2, "wrong mdp"); | |
945 IRT_END | |
946 #endif // ASSERT | |
947 | |
948 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) | |
949 assert(ProfileInterpreter, "must be profiling interpreter"); | |
950 ResourceMark rm(thread); | |
951 HandleMark hm(thread); | |
952 frame fr = thread->last_frame(); | |
953 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
954 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); | |
955 | |
956 // Grab a lock to ensure atomic access to setting the return bci and | |
957 // the displacement. This can block and GC, invalidating all naked oops. | |
958 MutexLocker ml(RetData_lock); | |
959 | |
960 // ProfileData is essentially a wrapper around a derived oop, so we | |
961 // need to take the lock before making any ProfileData structures. | |
962 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); | |
963 RetData* rdata = data->as_RetData(); | |
964 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); | |
965 fr.interpreter_frame_set_mdp(new_mdp); | |
966 IRT_END | |
967 | |
968 | |
969 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) | |
970 // We used to need an explict preserve_arguments here for invoke bytecodes. However, | |
971 // stack traversal automatically takes care of preserving arguments for invoke, so | |
972 // this is no longer needed. | |
973 | |
974 // IRT_END does an implicit safepoint check, hence we are guaranteed to block | |
975 // if this is called during a safepoint | |
976 | |
977 if (JvmtiExport::should_post_single_step()) { | |
978 // We are called during regular safepoints and when the VM is | |
979 // single stepping. If any thread is marked for single stepping, | |
980 // then we may have JVMTI work to do. | |
981 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); | |
982 } | |
983 IRT_END | |
984 | |
985 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, | |
986 ConstantPoolCacheEntry *cp_entry)) | |
987 | |
988 // check the access_flags for the field in the klass | |
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989 |
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990 instanceKlass* ik = instanceKlass::cast(java_lang_Class::as_klassOop(cp_entry->f1())); |
0 | 991 typeArrayOop fields = ik->fields(); |
992 int index = cp_entry->field_index(); | |
993 assert(index < fields->length(), "holders field index is out of range"); | |
994 // bail out if field accesses are not watched | |
995 if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; | |
996 | |
997 switch(cp_entry->flag_state()) { | |
998 case btos: // fall through | |
999 case ctos: // fall through | |
1000 case stos: // fall through | |
1001 case itos: // fall through | |
1002 case ftos: // fall through | |
1003 case ltos: // fall through | |
1004 case dtos: // fall through | |
1005 case atos: break; | |
1006 default: ShouldNotReachHere(); return; | |
1007 } | |
1008 bool is_static = (obj == NULL); | |
1009 HandleMark hm(thread); | |
1010 | |
1011 Handle h_obj; | |
1012 if (!is_static) { | |
1013 // non-static field accessors have an object, but we need a handle | |
1014 h_obj = Handle(thread, obj); | |
1015 } | |
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1016 instanceKlassHandle h_cp_entry_f1(thread, java_lang_Class::as_klassOop(cp_entry->f1())); |
0 | 1017 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); |
1018 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); | |
1019 IRT_END | |
1020 | |
1021 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, | |
1022 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) | |
1023 | |
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1024 klassOop k = java_lang_Class::as_klassOop(cp_entry->f1()); |
0 | 1025 |
1026 // check the access_flags for the field in the klass | |
1027 instanceKlass* ik = instanceKlass::cast(k); | |
1028 typeArrayOop fields = ik->fields(); | |
1029 int index = cp_entry->field_index(); | |
1030 assert(index < fields->length(), "holders field index is out of range"); | |
1031 // bail out if field modifications are not watched | |
1032 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; | |
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 |
1120 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true); | |
1121 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true); | |
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 } | |
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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 | |
1251 #if defined(IA32) || defined(AMD64) | |
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 |