Mercurial > hg > truffle
annotate src/share/vm/interpreter/interpreterRuntime.cpp @ 1565:ab102d5d923e
6939207: refactor constant pool index processing
Summary: Factored cleanup of instruction decode which prepares for enhanced ldc semantics.
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Sun, 23 May 2010 01:38:26 -0700 |
| parents | cd5dbf694d45 |
| children | e9ff18c4ace7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright 1997-2010 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_interpreterRuntime.cpp.incl" | |
| 27 | |
| 28 class UnlockFlagSaver { | |
| 29 private: | |
| 30 JavaThread* _thread; | |
| 31 bool _do_not_unlock; | |
| 32 public: | |
| 33 UnlockFlagSaver(JavaThread* t) { | |
| 34 _thread = t; | |
| 35 _do_not_unlock = t->do_not_unlock_if_synchronized(); | |
| 36 t->set_do_not_unlock_if_synchronized(false); | |
| 37 } | |
| 38 ~UnlockFlagSaver() { | |
| 39 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); | |
| 40 } | |
| 41 }; | |
| 42 | |
| 43 //------------------------------------------------------------------------------------------------------------------------ | |
| 44 // State accessors | |
| 45 | |
| 46 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { | |
| 47 last_frame(thread).interpreter_frame_set_bcp(bcp); | |
| 48 if (ProfileInterpreter) { | |
| 49 // ProfileTraps uses MDOs independently of ProfileInterpreter. | |
| 50 // That is why we must check both ProfileInterpreter and mdo != NULL. | |
| 51 methodDataOop mdo = last_frame(thread).interpreter_frame_method()->method_data(); | |
| 52 if (mdo != NULL) { | |
| 53 NEEDS_CLEANUP; | |
| 54 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); | |
| 55 } | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 //------------------------------------------------------------------------------------------------------------------------ | |
| 60 // Constants | |
| 61 | |
| 62 | |
| 63 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) | |
| 64 // access constant pool | |
| 65 constantPoolOop pool = method(thread)->constants(); | |
| 1565 | 66 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); |
| 0 | 67 constantTag tag = pool->tag_at(index); |
| 68 | |
| 69 if (tag.is_unresolved_klass() || tag.is_klass()) { | |
| 70 klassOop klass = pool->klass_at(index, CHECK); | |
| 71 oop java_class = klass->klass_part()->java_mirror(); | |
| 72 thread->set_vm_result(java_class); | |
| 73 } else { | |
| 74 #ifdef ASSERT | |
| 75 // If we entered this runtime routine, we believed the tag contained | |
| 76 // an unresolved string, an unresolved class or a resolved class. | |
| 77 // However, another thread could have resolved the unresolved string | |
| 78 // or class by the time we go there. | |
| 79 assert(tag.is_unresolved_string()|| tag.is_string(), "expected string"); | |
| 80 #endif | |
| 81 oop s_oop = pool->string_at(index, CHECK); | |
| 82 thread->set_vm_result(s_oop); | |
| 83 } | |
| 84 IRT_END | |
| 85 | |
| 86 | |
| 87 //------------------------------------------------------------------------------------------------------------------------ | |
| 88 // Allocation | |
| 89 | |
| 90 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index)) | |
| 91 klassOop k_oop = pool->klass_at(index, CHECK); | |
| 92 instanceKlassHandle klass (THREAD, k_oop); | |
| 93 | |
| 94 // Make sure we are not instantiating an abstract klass | |
| 95 klass->check_valid_for_instantiation(true, CHECK); | |
| 96 | |
| 97 // Make sure klass is initialized | |
| 98 klass->initialize(CHECK); | |
| 99 | |
| 100 // At this point the class may not be fully initialized | |
| 101 // because of recursive initialization. If it is fully | |
| 102 // initialized & has_finalized is not set, we rewrite | |
| 103 // it into its fast version (Note: no locking is needed | |
| 104 // here since this is an atomic byte write and can be | |
| 105 // done more than once). | |
| 106 // | |
| 107 // Note: In case of classes with has_finalized we don't | |
| 108 // rewrite since that saves us an extra check in | |
| 109 // the fast version which then would call the | |
| 110 // slow version anyway (and do a call back into | |
| 111 // Java). | |
| 112 // If we have a breakpoint, then we don't rewrite | |
| 113 // because the _breakpoint bytecode would be lost. | |
| 114 oop obj = klass->allocate_instance(CHECK); | |
| 115 thread->set_vm_result(obj); | |
| 116 IRT_END | |
| 117 | |
| 118 | |
| 119 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) | |
| 120 oop obj = oopFactory::new_typeArray(type, size, CHECK); | |
| 121 thread->set_vm_result(obj); | |
| 122 IRT_END | |
| 123 | |
| 124 | |
| 125 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size)) | |
| 126 // Note: no oopHandle for pool & klass needed since they are not used | |
| 127 // anymore after new_objArray() and no GC can happen before. | |
| 128 // (This may have to change if this code changes!) | |
| 129 klassOop klass = pool->klass_at(index, CHECK); | |
| 130 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); | |
| 131 thread->set_vm_result(obj); | |
| 132 IRT_END | |
| 133 | |
| 134 | |
| 135 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) | |
| 136 // We may want to pass in more arguments - could make this slightly faster | |
| 137 constantPoolOop constants = method(thread)->constants(); | |
| 1565 | 138 int i = get_index_u2(thread, Bytecodes::_multianewarray); |
| 0 | 139 klassOop klass = constants->klass_at(i, CHECK); |
| 140 int nof_dims = number_of_dimensions(thread); | |
| 141 assert(oop(klass)->is_klass(), "not a class"); | |
| 142 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); | |
| 143 | |
| 144 // We must create an array of jints to pass to multi_allocate. | |
| 145 ResourceMark rm(thread); | |
| 146 const int small_dims = 10; | |
| 147 jint dim_array[small_dims]; | |
| 148 jint *dims = &dim_array[0]; | |
| 149 if (nof_dims > small_dims) { | |
| 150 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); | |
| 151 } | |
| 152 for (int index = 0; index < nof_dims; index++) { | |
| 153 // offset from first_size_address is addressed as local[index] | |
| 154 int n = Interpreter::local_offset_in_bytes(index)/jintSize; | |
| 155 dims[index] = first_size_address[n]; | |
| 156 } | |
| 157 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); | |
| 158 thread->set_vm_result(obj); | |
| 159 IRT_END | |
| 160 | |
| 161 | |
| 162 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
| 163 assert(obj->is_oop(), "must be a valid oop"); | |
| 164 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
| 165 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
| 166 IRT_END | |
| 167 | |
| 168 | |
| 169 // Quicken instance-of and check-cast bytecodes | |
| 170 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) | |
| 171 // Force resolving; quicken the bytecode | |
| 1565 | 172 int which = get_index_u2(thread, Bytecodes::_checkcast); |
| 0 | 173 constantPoolOop cpool = method(thread)->constants(); |
| 174 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded | |
| 175 // program we might have seen an unquick'd bytecode in the interpreter but have another | |
| 176 // thread quicken the bytecode before we get here. | |
| 177 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); | |
| 178 klassOop klass = cpool->klass_at(which, CHECK); | |
| 179 thread->set_vm_result(klass); | |
| 180 IRT_END | |
| 181 | |
| 182 | |
| 183 //------------------------------------------------------------------------------------------------------------------------ | |
| 184 // Exceptions | |
| 185 | |
| 186 // Assume the compiler is (or will be) interested in this event. | |
| 187 // If necessary, create an MDO to hold the information, and record it. | |
| 188 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { | |
| 189 assert(ProfileTraps, "call me only if profiling"); | |
| 190 methodHandle trap_method(thread, method(thread)); | |
| 191 if (trap_method.not_null()) { | |
| 192 methodDataHandle trap_mdo(thread, trap_method->method_data()); | |
| 193 if (trap_mdo.is_null()) { | |
| 194 methodOopDesc::build_interpreter_method_data(trap_method, THREAD); | |
| 195 if (HAS_PENDING_EXCEPTION) { | |
| 196 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
| 197 CLEAR_PENDING_EXCEPTION; | |
| 198 } | |
| 199 trap_mdo = methodDataHandle(thread, trap_method->method_data()); | |
| 200 // and fall through... | |
| 201 } | |
| 202 if (trap_mdo.not_null()) { | |
| 203 // Update per-method count of trap events. The interpreter | |
| 204 // is updating the MDO to simulate the effect of compiler traps. | |
| 205 int trap_bci = trap_method->bci_from(bcp(thread)); | |
| 206 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); | |
| 207 } | |
| 208 } | |
| 209 } | |
| 210 | |
| 211 static Handle get_preinitialized_exception(klassOop k, TRAPS) { | |
| 212 // get klass | |
| 213 instanceKlass* klass = instanceKlass::cast(k); | |
| 214 assert(klass->is_initialized(), | |
| 215 "this klass should have been initialized during VM initialization"); | |
| 216 // create instance - do not call constructor since we may have no | |
| 217 // (java) stack space left (should assert constructor is empty) | |
| 218 Handle exception; | |
| 219 oop exception_oop = klass->allocate_instance(CHECK_(exception)); | |
| 220 exception = Handle(THREAD, exception_oop); | |
| 221 if (StackTraceInThrowable) { | |
| 222 java_lang_Throwable::fill_in_stack_trace(exception); | |
| 223 } | |
| 224 return exception; | |
| 225 } | |
| 226 | |
| 227 // Special handling for stack overflow: since we don't have any (java) stack | |
| 228 // space left we use the pre-allocated & pre-initialized StackOverflowError | |
| 229 // klass to create an stack overflow error instance. We do not call its | |
| 230 // constructor for the same reason (it is empty, anyway). | |
| 231 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) | |
| 232 Handle exception = get_preinitialized_exception( | |
| 233 SystemDictionary::StackOverflowError_klass(), | |
| 234 CHECK); | |
| 235 THROW_HANDLE(exception); | |
| 236 IRT_END | |
| 237 | |
| 238 | |
| 239 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) | |
| 240 // lookup exception klass | |
| 241 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
| 242 if (ProfileTraps) { | |
| 243 if (s == vmSymbols::java_lang_ArithmeticException()) { | |
| 244 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); | |
| 245 } else if (s == vmSymbols::java_lang_NullPointerException()) { | |
| 246 note_trap(thread, Deoptimization::Reason_null_check, CHECK); | |
| 247 } | |
| 248 } | |
| 249 // create exception | |
| 250 Handle exception = Exceptions::new_exception(thread, s(), message); | |
| 251 thread->set_vm_result(exception()); | |
| 252 IRT_END | |
| 253 | |
| 254 | |
| 255 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) | |
| 256 ResourceMark rm(thread); | |
| 257 const char* klass_name = Klass::cast(obj->klass())->external_name(); | |
| 258 // lookup exception klass | |
| 259 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
| 260 if (ProfileTraps) { | |
| 261 note_trap(thread, Deoptimization::Reason_class_check, CHECK); | |
| 262 } | |
| 263 // create exception, with klass name as detail message | |
| 264 Handle exception = Exceptions::new_exception(thread, s(), klass_name); | |
| 265 thread->set_vm_result(exception()); | |
| 266 IRT_END | |
| 267 | |
| 268 | |
| 269 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) | |
| 270 char message[jintAsStringSize]; | |
| 271 // lookup exception klass | |
| 272 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
| 273 if (ProfileTraps) { | |
| 274 note_trap(thread, Deoptimization::Reason_range_check, CHECK); | |
| 275 } | |
| 276 // create exception | |
| 277 sprintf(message, "%d", index); | |
| 278 THROW_MSG(s(), message); | |
| 279 IRT_END | |
| 280 | |
| 281 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( | |
| 282 JavaThread* thread, oopDesc* obj)) | |
| 283 | |
| 284 ResourceMark rm(thread); | |
| 285 char* message = SharedRuntime::generate_class_cast_message( | |
| 286 thread, Klass::cast(obj->klass())->external_name()); | |
| 287 | |
| 288 if (ProfileTraps) { | |
| 289 note_trap(thread, Deoptimization::Reason_class_check, CHECK); | |
| 290 } | |
| 291 | |
| 292 // create exception | |
| 293 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); | |
| 294 IRT_END | |
| 295 | |
| 710 | 296 // required can be either a MethodType, or a Class (for a single argument) |
| 297 // actual (if not null) can be either a MethodHandle, or an arbitrary value (for a single argument) | |
| 298 IRT_ENTRY(void, InterpreterRuntime::throw_WrongMethodTypeException(JavaThread* thread, | |
| 299 oopDesc* required, | |
| 300 oopDesc* actual)) { | |
| 301 ResourceMark rm(thread); | |
| 302 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual); | |
| 303 | |
| 304 if (ProfileTraps) { | |
| 305 note_trap(thread, Deoptimization::Reason_constraint, CHECK); | |
| 306 } | |
| 307 | |
| 308 // create exception | |
| 309 THROW_MSG(vmSymbols::java_dyn_WrongMethodTypeException(), message); | |
| 310 } | |
| 311 IRT_END | |
| 312 | |
| 313 | |
| 0 | 314 |
| 315 // exception_handler_for_exception(...) returns the continuation address, | |
| 316 // the exception oop (via TLS) and sets the bci/bcp for the continuation. | |
| 317 // The exception oop is returned to make sure it is preserved over GC (it | |
| 318 // is only on the stack if the exception was thrown explicitly via athrow). | |
| 319 // During this operation, the expression stack contains the values for the | |
| 320 // bci where the exception happened. If the exception was propagated back | |
| 321 // from a call, the expression stack contains the values for the bci at the | |
| 322 // invoke w/o arguments (i.e., as if one were inside the call). | |
| 323 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) | |
| 324 | |
| 325 Handle h_exception(thread, exception); | |
| 326 methodHandle h_method (thread, method(thread)); | |
| 327 constantPoolHandle h_constants(thread, h_method->constants()); | |
| 328 typeArrayHandle h_extable (thread, h_method->exception_table()); | |
| 329 bool should_repeat; | |
| 330 int handler_bci; | |
| 331 int current_bci = bcp(thread) - h_method->code_base(); | |
| 332 | |
| 333 // Need to do this check first since when _do_not_unlock_if_synchronized | |
| 334 // is set, we don't want to trigger any classloading which may make calls | |
| 335 // into java, or surprisingly find a matching exception handler for bci 0 | |
| 336 // since at this moment the method hasn't been "officially" entered yet. | |
| 337 if (thread->do_not_unlock_if_synchronized()) { | |
| 338 ResourceMark rm; | |
| 339 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); | |
| 340 thread->set_vm_result(exception); | |
| 341 #ifdef CC_INTERP | |
| 342 return (address) -1; | |
| 343 #else | |
| 344 return Interpreter::remove_activation_entry(); | |
| 345 #endif | |
| 346 } | |
| 347 | |
| 348 do { | |
| 349 should_repeat = false; | |
| 350 | |
| 351 // assertions | |
| 352 #ifdef ASSERT | |
| 353 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); | |
| 354 assert(h_exception->is_oop(), "just checking"); | |
| 355 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError | |
| 1142 | 356 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { |
| 0 | 357 if (ExitVMOnVerifyError) vm_exit(-1); |
| 358 ShouldNotReachHere(); | |
| 359 } | |
| 360 #endif | |
| 361 | |
| 362 // tracing | |
| 363 if (TraceExceptions) { | |
| 364 ttyLocker ttyl; | |
| 365 ResourceMark rm(thread); | |
| 366 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); | |
| 367 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); | |
| 368 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); | |
| 369 } | |
| 370 // Don't go paging in something which won't be used. | |
| 371 // else if (h_extable->length() == 0) { | |
| 372 // // disabled for now - interpreter is not using shortcut yet | |
| 373 // // (shortcut is not to call runtime if we have no exception handlers) | |
| 374 // // warning("performance bug: should not call runtime if method has no exception handlers"); | |
| 375 // } | |
| 376 // for AbortVMOnException flag | |
| 377 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); | |
| 378 | |
| 379 // exception handler lookup | |
| 380 KlassHandle h_klass(THREAD, h_exception->klass()); | |
| 381 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); | |
| 382 if (HAS_PENDING_EXCEPTION) { | |
| 383 // We threw an exception while trying to find the exception handler. | |
| 384 // Transfer the new exception to the exception handle which will | |
| 385 // be set into thread local storage, and do another lookup for an | |
| 386 // exception handler for this exception, this time starting at the | |
| 387 // BCI of the exception handler which caused the exception to be | |
| 388 // thrown (bug 4307310). | |
| 389 h_exception = Handle(THREAD, PENDING_EXCEPTION); | |
| 390 CLEAR_PENDING_EXCEPTION; | |
| 391 if (handler_bci >= 0) { | |
| 392 current_bci = handler_bci; | |
| 393 should_repeat = true; | |
| 394 } | |
| 395 } | |
| 396 } while (should_repeat == true); | |
| 397 | |
| 398 // notify JVMTI of an exception throw; JVMTI will detect if this is a first | |
| 399 // time throw or a stack unwinding throw and accordingly notify the debugger | |
|
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400 if (JvmtiExport::can_post_on_exceptions()) { |
| 0 | 401 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); |
| 402 } | |
| 403 | |
| 404 #ifdef CC_INTERP | |
| 405 address continuation = (address)(intptr_t) handler_bci; | |
| 406 #else | |
| 407 address continuation = NULL; | |
| 408 #endif | |
| 409 address handler_pc = NULL; | |
| 410 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { | |
| 411 // Forward exception to callee (leaving bci/bcp untouched) because (a) no | |
| 412 // handler in this method, or (b) after a stack overflow there is not yet | |
| 413 // enough stack space available to reprotect the stack. | |
| 414 #ifndef CC_INTERP | |
| 415 continuation = Interpreter::remove_activation_entry(); | |
| 416 #endif | |
| 417 // Count this for compilation purposes | |
| 418 h_method->interpreter_throwout_increment(); | |
| 419 } else { | |
| 420 // handler in this method => change bci/bcp to handler bci/bcp and continue there | |
| 421 handler_pc = h_method->code_base() + handler_bci; | |
| 422 #ifndef CC_INTERP | |
| 423 set_bcp_and_mdp(handler_pc, thread); | |
| 424 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; | |
| 425 #endif | |
| 426 } | |
| 427 // notify debugger of an exception catch | |
| 428 // (this is good for exceptions caught in native methods as well) | |
|
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429 if (JvmtiExport::can_post_on_exceptions()) { |
| 0 | 430 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); |
| 431 } | |
| 432 | |
| 433 thread->set_vm_result(h_exception()); | |
| 434 return continuation; | |
| 435 IRT_END | |
| 436 | |
| 437 | |
| 438 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) | |
| 439 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); | |
| 440 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) | |
| 441 IRT_END | |
| 442 | |
| 443 | |
| 444 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
| 445 THROW(vmSymbols::java_lang_AbstractMethodError()); | |
| 446 IRT_END | |
| 447 | |
| 448 | |
| 449 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) | |
| 450 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); | |
| 451 IRT_END | |
| 452 | |
| 453 | |
| 454 //------------------------------------------------------------------------------------------------------------------------ | |
| 455 // Fields | |
| 456 // | |
| 457 | |
| 458 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) | |
| 459 // resolve field | |
| 460 FieldAccessInfo info; | |
| 461 constantPoolHandle pool(thread, method(thread)->constants()); | |
| 462 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); | |
| 463 | |
| 464 { | |
| 465 JvmtiHideSingleStepping jhss(thread); | |
| 1565 | 466 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode), |
| 0 | 467 bytecode, false, CHECK); |
| 468 } // end JvmtiHideSingleStepping | |
| 469 | |
| 470 // check if link resolution caused cpCache to be updated | |
| 471 if (already_resolved(thread)) return; | |
| 472 | |
| 473 // compute auxiliary field attributes | |
| 474 TosState state = as_TosState(info.field_type()); | |
| 475 | |
| 476 // We need to delay resolving put instructions on final fields | |
| 477 // until we actually invoke one. This is required so we throw | |
| 478 // exceptions at the correct place. If we do not resolve completely | |
| 479 // in the current pass, leaving the put_code set to zero will | |
| 480 // cause the next put instruction to reresolve. | |
| 481 bool is_put = (bytecode == Bytecodes::_putfield || | |
| 482 bytecode == Bytecodes::_putstatic); | |
| 483 Bytecodes::Code put_code = (Bytecodes::Code)0; | |
| 484 | |
| 485 // We also need to delay resolving getstatic instructions until the | |
| 486 // class is intitialized. This is required so that access to the static | |
| 487 // field will call the initialization function every time until the class | |
| 488 // is completely initialized ala. in 2.17.5 in JVM Specification. | |
| 489 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); | |
| 490 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && | |
| 491 !klass->is_initialized()); | |
| 492 Bytecodes::Code get_code = (Bytecodes::Code)0; | |
| 493 | |
| 494 | |
| 495 if (!uninitialized_static) { | |
| 496 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); | |
| 497 if (is_put || !info.access_flags().is_final()) { | |
| 498 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); | |
| 499 } | |
| 500 } | |
| 501 | |
| 502 cache_entry(thread)->set_field( | |
| 503 get_code, | |
| 504 put_code, | |
| 505 info.klass(), | |
| 506 info.field_index(), | |
| 507 info.field_offset(), | |
| 508 state, | |
| 509 info.access_flags().is_final(), | |
| 510 info.access_flags().is_volatile() | |
| 511 ); | |
| 512 IRT_END | |
| 513 | |
| 514 | |
| 515 //------------------------------------------------------------------------------------------------------------------------ | |
| 516 // Synchronization | |
| 517 // | |
| 518 // The interpreter's synchronization code is factored out so that it can | |
| 519 // be shared by method invocation and synchronized blocks. | |
| 520 //%note synchronization_3 | |
| 521 | |
| 522 static void trace_locking(Handle& h_locking_obj, bool is_locking) { | |
| 523 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); | |
| 524 } | |
| 525 | |
| 526 | |
| 527 //%note monitor_1 | |
| 528 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) | |
| 529 #ifdef ASSERT | |
| 530 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
| 531 #endif | |
| 532 if (PrintBiasedLockingStatistics) { | |
| 533 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
| 534 } | |
| 535 Handle h_obj(thread, elem->obj()); | |
| 536 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
| 537 "must be NULL or an object"); | |
| 538 if (UseBiasedLocking) { | |
| 539 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
| 540 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); | |
| 541 } else { | |
| 542 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); | |
| 543 } | |
| 544 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), | |
| 545 "must be NULL or an object"); | |
| 546 #ifdef ASSERT | |
| 547 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
| 548 #endif | |
| 549 IRT_END | |
| 550 | |
| 551 | |
| 552 //%note monitor_1 | |
| 553 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) | |
| 554 #ifdef ASSERT | |
| 555 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
| 556 #endif | |
| 557 Handle h_obj(thread, elem->obj()); | |
| 558 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
| 559 "must be NULL or an object"); | |
| 560 if (elem == NULL || h_obj()->is_unlocked()) { | |
| 561 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
| 562 } | |
| 563 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); | |
| 564 // Free entry. This must be done here, since a pending exception might be installed on | |
| 565 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. | |
| 566 elem->set_obj(NULL); | |
| 567 #ifdef ASSERT | |
| 568 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
| 569 #endif | |
| 570 IRT_END | |
| 571 | |
| 572 | |
| 573 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) | |
| 574 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
| 575 IRT_END | |
| 576 | |
| 577 | |
| 578 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) | |
| 579 // Returns an illegal exception to install into the current thread. The | |
| 580 // pending_exception flag is cleared so normal exception handling does not | |
| 581 // trigger. Any current installed exception will be overwritten. This | |
| 582 // method will be called during an exception unwind. | |
| 583 | |
| 584 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); | |
| 585 Handle exception(thread, thread->vm_result()); | |
| 586 assert(exception() != NULL, "vm result should be set"); | |
| 587 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) | |
| 1142 | 588 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
| 0 | 589 exception = get_preinitialized_exception( |
| 590 SystemDictionary::IllegalMonitorStateException_klass(), | |
| 591 CATCH); | |
| 592 } | |
| 593 thread->set_vm_result(exception()); | |
| 594 IRT_END | |
| 595 | |
| 596 | |
| 597 //------------------------------------------------------------------------------------------------------------------------ | |
| 598 // Invokes | |
| 599 | |
| 600 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) | |
| 601 return method->orig_bytecode_at(method->bci_from(bcp)); | |
| 602 IRT_END | |
| 603 | |
| 604 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) | |
| 605 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); | |
| 606 IRT_END | |
| 607 | |
| 608 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) | |
| 609 JvmtiExport::post_raw_breakpoint(thread, method, bcp); | |
| 610 IRT_END | |
| 611 | |
| 612 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) | |
| 613 // extract receiver from the outgoing argument list if necessary | |
| 614 Handle receiver(thread, NULL); | |
| 615 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { | |
| 616 ResourceMark rm(thread); | |
| 617 methodHandle m (thread, method(thread)); | |
| 618 int bci = m->bci_from(bcp(thread)); | |
| 619 Bytecode_invoke* call = Bytecode_invoke_at(m, bci); | |
| 620 symbolHandle signature (thread, call->signature()); | |
| 621 receiver = Handle(thread, | |
| 622 thread->last_frame().interpreter_callee_receiver(signature)); | |
| 623 assert(Universe::heap()->is_in_reserved_or_null(receiver()), | |
| 624 "sanity check"); | |
| 625 assert(receiver.is_null() || | |
| 626 Universe::heap()->is_in_reserved(receiver->klass()), | |
| 627 "sanity check"); | |
| 628 } | |
| 629 | |
| 630 // resolve method | |
| 631 CallInfo info; | |
| 632 constantPoolHandle pool(thread, method(thread)->constants()); | |
| 633 | |
| 634 { | |
| 635 JvmtiHideSingleStepping jhss(thread); | |
| 636 LinkResolver::resolve_invoke(info, receiver, pool, | |
| 1565 | 637 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
| 0 | 638 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { |
| 639 int retry_count = 0; | |
| 640 while (info.resolved_method()->is_old()) { | |
| 641 // It is very unlikely that method is redefined more than 100 times | |
| 642 // in the middle of resolve. If it is looping here more than 100 times | |
| 643 // means then there could be a bug here. | |
| 644 guarantee((retry_count++ < 100), | |
| 645 "Could not resolve to latest version of redefined method"); | |
| 646 // method is redefined in the middle of resolve so re-try. | |
| 647 LinkResolver::resolve_invoke(info, receiver, pool, | |
| 1565 | 648 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
| 0 | 649 } |
| 650 } | |
| 651 } // end JvmtiHideSingleStepping | |
| 652 | |
| 653 // check if link resolution caused cpCache to be updated | |
| 654 if (already_resolved(thread)) return; | |
| 655 | |
| 656 if (bytecode == Bytecodes::_invokeinterface) { | |
| 657 | |
| 658 if (TraceItables && Verbose) { | |
| 659 ResourceMark rm(thread); | |
| 660 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); | |
| 661 } | |
| 662 if (info.resolved_method()->method_holder() == | |
| 1142 | 663 SystemDictionary::Object_klass()) { |
| 0 | 664 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec |
| 665 // (see also cpCacheOop.cpp for details) | |
| 666 methodHandle rm = info.resolved_method(); | |
| 667 assert(rm->is_final() || info.has_vtable_index(), | |
| 668 "should have been set already"); | |
| 669 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); | |
| 670 } else { | |
| 671 // Setup itable entry | |
| 672 int index = klassItable::compute_itable_index(info.resolved_method()()); | |
| 673 cache_entry(thread)->set_interface_call(info.resolved_method(), index); | |
| 674 } | |
| 675 } else { | |
| 676 cache_entry(thread)->set_method( | |
| 677 bytecode, | |
| 678 info.resolved_method(), | |
| 679 info.vtable_index()); | |
| 680 } | |
| 681 IRT_END | |
| 682 | |
| 683 | |
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684 // First time execution: Resolve symbols, create a permanent CallSite object. |
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685 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { |
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686 ResourceMark rm(thread); |
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687 |
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688 assert(EnableInvokeDynamic, ""); |
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689 |
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690 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; |
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691 |
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692 methodHandle caller_method(thread, method(thread)); |
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693 |
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694 // first find the bootstrap method |
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695 KlassHandle caller_klass(thread, caller_method->method_holder()); |
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696 Handle bootm = SystemDictionary::find_bootstrap_method(caller_klass, CHECK); |
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697 |
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698 constantPoolHandle pool(thread, caller_method->constants()); |
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699 pool->set_invokedynamic(); // mark header to flag active call sites |
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700 |
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701 int caller_bci = 0; |
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702 int site_index = 0; |
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703 { address caller_bcp = bcp(thread); |
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704 caller_bci = caller_method->bci_from(caller_bcp); |
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705 site_index = Bytes::get_native_u4(caller_bcp+1); |
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706 } |
| 1565 | 707 assert(site_index == InterpreterRuntime::bytecode(thread)->get_index_u4(bytecode), ""); |
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708 assert(constantPoolCacheOopDesc::is_secondary_index(site_index), "proper format"); |
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709 // there is a second CPC entries that is of interest; it caches signature info: |
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710 int main_index = pool->cache()->secondary_entry_at(site_index)->main_entry_index(); |
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711 |
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712 // first resolve the signature to a MH.invoke methodOop |
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713 if (!pool->cache()->entry_at(main_index)->is_resolved(bytecode)) { |
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714 JvmtiHideSingleStepping jhss(thread); |
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715 CallInfo info; |
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716 LinkResolver::resolve_invoke(info, Handle(), pool, |
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717 site_index, bytecode, CHECK); |
|
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718 // The main entry corresponds to a JVM_CONSTANT_NameAndType, and serves |
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719 // as a common reference point for all invokedynamic call sites with |
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720 // that exact call descriptor. We will link it in the CP cache exactly |
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721 // as if it were an invokevirtual of MethodHandle.invoke. |
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722 pool->cache()->entry_at(main_index)->set_method( |
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723 bytecode, |
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724 info.resolved_method(), |
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725 info.vtable_index()); |
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726 assert(pool->cache()->entry_at(main_index)->is_vfinal(), "f2 must be a methodOop"); |
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727 } |
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728 |
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729 // The method (f2 entry) of the main entry is the MH.invoke for the |
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730 // invokedynamic target call signature. |
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731 intptr_t f2_value = pool->cache()->entry_at(main_index)->f2(); |
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732 methodHandle signature_invoker(THREAD, (methodOop) f2_value); |
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733 assert(signature_invoker.not_null() && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(), |
|
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734 "correct result from LinkResolver::resolve_invokedynamic"); |
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735 |
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736 symbolHandle call_site_name(THREAD, pool->name_ref_at(site_index)); |
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737 |
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738 Handle info; // NYI: Other metadata from a new kind of CP entry. (Annotations?) |
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739 |
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740 // this is the index which gets stored on the CallSite object (as "callerPosition"): |
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741 int call_site_position = constantPoolCacheOopDesc::decode_secondary_index(site_index); |
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742 |
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743 Handle call_site |
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744 = SystemDictionary::make_dynamic_call_site(bootm, |
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745 // Callee information: |
|
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746 call_site_name, |
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747 signature_invoker, |
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748 info, |
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749 // Caller information: |
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750 caller_method, |
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751 caller_bci, |
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752 CHECK); |
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753 |
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754 // In the secondary entry, the f1 field is the call site, and the f2 (index) |
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755 // field is some data about the invoke site. Currently, it is just the BCI. |
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756 // Later, it might be changed to help manage inlining dependencies. |
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757 pool->cache()->secondary_entry_at(site_index)->set_dynamic_call(call_site, signature_invoker); |
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758 } |
|
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759 IRT_END |
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760 |
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761 |
| 0 | 762 //------------------------------------------------------------------------------------------------------------------------ |
| 763 // Miscellaneous | |
| 764 | |
| 765 | |
| 766 #ifndef PRODUCT | |
| 767 static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci, address branch_bcp) { | |
| 768 if (TraceInvocationCounterOverflow) { | |
| 769 InvocationCounter* ic = m->invocation_counter(); | |
| 770 InvocationCounter* bc = m->backedge_counter(); | |
| 771 ResourceMark rm; | |
| 772 const char* msg = | |
| 773 branch_bcp == NULL | |
| 774 ? "comp-policy cntr ovfl @ %d in entry of " | |
| 775 : "comp-policy cntr ovfl @ %d in loop of "; | |
| 776 tty->print(msg, bci); | |
| 777 m->print_value(); | |
| 778 tty->cr(); | |
| 779 ic->print(); | |
| 780 bc->print(); | |
| 781 if (ProfileInterpreter) { | |
| 782 if (branch_bcp != NULL) { | |
| 783 methodDataOop mdo = m->method_data(); | |
| 784 if (mdo != NULL) { | |
| 785 int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken(); | |
| 786 tty->print_cr("back branch count = %d", count); | |
| 787 } | |
| 788 } | |
| 789 } | |
| 790 } | |
| 791 } | |
| 792 | |
| 793 static void trace_osr_request(methodHandle method, nmethod* osr, int bci) { | |
| 794 if (TraceOnStackReplacement) { | |
| 795 ResourceMark rm; | |
| 796 tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for "); | |
| 797 method->print_short_name(tty); | |
| 798 tty->print_cr(" at bci %d", bci); | |
| 799 } | |
| 800 } | |
| 801 #endif // !PRODUCT | |
| 802 | |
| 941 | 803 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { |
| 804 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); | |
| 805 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); | |
| 806 if (branch_bcp != NULL && nm != NULL) { | |
| 807 // This was a successful request for an OSR nmethod. Because | |
| 808 // frequency_counter_overflow_inner ends with a safepoint check, | |
| 809 // nm could have been unloaded so look it up again. It's unsafe | |
| 810 // to examine nm directly since it might have been freed and used | |
| 811 // for something else. | |
| 812 frame fr = thread->last_frame(); | |
| 813 methodOop method = fr.interpreter_frame_method(); | |
| 814 int bci = method->bci_from(fr.interpreter_frame_bcp()); | |
| 815 nm = method->lookup_osr_nmethod_for(bci); | |
| 816 } | |
| 817 return nm; | |
| 818 } | |
| 819 | |
| 0 | 820 IRT_ENTRY(nmethod*, |
| 941 | 821 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) |
| 0 | 822 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
| 823 // flag, in case this method triggers classloading which will call into Java. | |
| 824 UnlockFlagSaver fs(thread); | |
| 825 | |
| 826 frame fr = thread->last_frame(); | |
| 827 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
| 828 methodHandle method(thread, fr.interpreter_frame_method()); | |
| 829 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : 0; | |
| 830 const int bci = method->bci_from(fr.interpreter_frame_bcp()); | |
| 831 NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci, branch_bcp);) | |
| 832 | |
| 833 if (JvmtiExport::can_post_interpreter_events()) { | |
| 834 if (thread->is_interp_only_mode()) { | |
| 835 // If certain JVMTI events (e.g. frame pop event) are requested then the | |
| 836 // thread is forced to remain in interpreted code. This is | |
| 837 // implemented partly by a check in the run_compiled_code | |
| 838 // section of the interpreter whether we should skip running | |
| 839 // compiled code, and partly by skipping OSR compiles for | |
| 840 // interpreted-only threads. | |
| 841 if (branch_bcp != NULL) { | |
| 842 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); | |
| 843 return NULL; | |
| 844 } | |
| 845 } | |
| 846 } | |
| 847 | |
| 848 if (branch_bcp == NULL) { | |
| 849 // when code cache is full, compilation gets switched off, UseCompiler | |
| 850 // is set to false | |
| 851 if (!method->has_compiled_code() && UseCompiler) { | |
| 852 CompilationPolicy::policy()->method_invocation_event(method, CHECK_NULL); | |
| 853 } else { | |
| 854 // Force counter overflow on method entry, even if no compilation | |
| 855 // happened. (The method_invocation_event call does this also.) | |
| 856 CompilationPolicy::policy()->reset_counter_for_invocation_event(method); | |
| 857 } | |
| 858 // compilation at an invocation overflow no longer goes and retries test for | |
| 859 // compiled method. We always run the loser of the race as interpreted. | |
| 860 // so return NULL | |
| 861 return NULL; | |
| 862 } else { | |
| 863 // counter overflow in a loop => try to do on-stack-replacement | |
| 864 nmethod* osr_nm = method->lookup_osr_nmethod_for(bci); | |
| 865 NOT_PRODUCT(trace_osr_request(method, osr_nm, bci);) | |
| 866 // when code cache is full, we should not compile any more... | |
| 867 if (osr_nm == NULL && UseCompiler) { | |
| 868 const int branch_bci = method->bci_from(branch_bcp); | |
| 869 CompilationPolicy::policy()->method_back_branch_event(method, branch_bci, bci, CHECK_NULL); | |
| 870 osr_nm = method->lookup_osr_nmethod_for(bci); | |
| 871 } | |
| 872 if (osr_nm == NULL) { | |
| 873 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); | |
| 874 return NULL; | |
| 875 } else { | |
| 876 // We may need to do on-stack replacement which requires that no | |
| 877 // monitors in the activation are biased because their | |
| 878 // BasicObjectLocks will need to migrate during OSR. Force | |
| 879 // unbiasing of all monitors in the activation now (even though | |
| 880 // the OSR nmethod might be invalidated) because we don't have a | |
| 881 // safepoint opportunity later once the migration begins. | |
| 882 if (UseBiasedLocking) { | |
| 883 ResourceMark rm; | |
| 884 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 885 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
| 886 kptr < fr.interpreter_frame_monitor_begin(); | |
| 887 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
| 888 if( kptr->obj() != NULL ) { | |
| 889 objects_to_revoke->append(Handle(THREAD, kptr->obj())); | |
| 890 } | |
| 891 } | |
| 892 BiasedLocking::revoke(objects_to_revoke); | |
| 893 } | |
| 894 return osr_nm; | |
| 895 } | |
| 896 } | |
| 897 IRT_END | |
| 898 | |
| 899 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) | |
| 900 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 901 int bci = method->bci_from(cur_bcp); | |
| 902 methodDataOop mdo = method->method_data(); | |
| 903 if (mdo == NULL) return 0; | |
| 904 return mdo->bci_to_di(bci); | |
| 905 IRT_END | |
| 906 | |
| 907 IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp)) | |
| 908 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized | |
| 909 // flag, in case this method triggers classloading which will call into Java. | |
| 910 UnlockFlagSaver fs(thread); | |
| 911 | |
| 912 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 913 frame fr = thread->last_frame(); | |
| 914 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
| 915 methodHandle method(thread, fr.interpreter_frame_method()); | |
| 916 int bci = method->bci_from(cur_bcp); | |
| 917 methodOopDesc::build_interpreter_method_data(method, THREAD); | |
| 918 if (HAS_PENDING_EXCEPTION) { | |
| 919 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
| 920 CLEAR_PENDING_EXCEPTION; | |
| 921 // and fall through... | |
| 922 } | |
| 923 methodDataOop mdo = method->method_data(); | |
| 924 if (mdo == NULL) return 0; | |
| 925 return mdo->bci_to_di(bci); | |
| 926 IRT_END | |
| 927 | |
| 928 | |
| 929 #ifdef ASSERT | |
| 930 IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) | |
| 931 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 932 | |
| 933 methodDataOop mdo = method->method_data(); | |
| 934 assert(mdo != NULL, "must not be null"); | |
| 935 | |
| 936 int bci = method->bci_from(bcp); | |
| 937 | |
| 938 address mdp2 = mdo->bci_to_dp(bci); | |
| 939 if (mdp != mdp2) { | |
| 940 ResourceMark rm; | |
| 941 ResetNoHandleMark rnm; // In a LEAF entry. | |
| 942 HandleMark hm; | |
| 943 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); | |
| 944 int current_di = mdo->dp_to_di(mdp); | |
| 945 int expected_di = mdo->dp_to_di(mdp2); | |
| 946 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); | |
| 947 int expected_approx_bci = mdo->data_at(expected_di)->bci(); | |
| 948 int approx_bci = -1; | |
| 949 if (current_di >= 0) { | |
| 950 approx_bci = mdo->data_at(current_di)->bci(); | |
| 951 } | |
| 952 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); | |
| 953 mdo->print_on(tty); | |
| 954 method->print_codes(); | |
| 955 } | |
| 956 assert(mdp == mdp2, "wrong mdp"); | |
| 957 IRT_END | |
| 958 #endif // ASSERT | |
| 959 | |
| 960 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) | |
| 961 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 962 ResourceMark rm(thread); | |
| 963 HandleMark hm(thread); | |
| 964 frame fr = thread->last_frame(); | |
| 965 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
| 966 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); | |
| 967 | |
| 968 // Grab a lock to ensure atomic access to setting the return bci and | |
| 969 // the displacement. This can block and GC, invalidating all naked oops. | |
| 970 MutexLocker ml(RetData_lock); | |
| 971 | |
| 972 // ProfileData is essentially a wrapper around a derived oop, so we | |
| 973 // need to take the lock before making any ProfileData structures. | |
| 974 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); | |
| 975 RetData* rdata = data->as_RetData(); | |
| 976 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); | |
| 977 fr.interpreter_frame_set_mdp(new_mdp); | |
| 978 IRT_END | |
| 979 | |
| 980 | |
| 981 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) | |
| 982 // We used to need an explict preserve_arguments here for invoke bytecodes. However, | |
| 983 // stack traversal automatically takes care of preserving arguments for invoke, so | |
| 984 // this is no longer needed. | |
| 985 | |
| 986 // IRT_END does an implicit safepoint check, hence we are guaranteed to block | |
| 987 // if this is called during a safepoint | |
| 988 | |
| 989 if (JvmtiExport::should_post_single_step()) { | |
| 990 // We are called during regular safepoints and when the VM is | |
| 991 // single stepping. If any thread is marked for single stepping, | |
| 992 // then we may have JVMTI work to do. | |
| 993 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); | |
| 994 } | |
| 995 IRT_END | |
| 996 | |
| 997 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, | |
| 998 ConstantPoolCacheEntry *cp_entry)) | |
| 999 | |
| 1000 // check the access_flags for the field in the klass | |
| 1001 instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1()); | |
| 1002 typeArrayOop fields = ik->fields(); | |
| 1003 int index = cp_entry->field_index(); | |
| 1004 assert(index < fields->length(), "holders field index is out of range"); | |
| 1005 // bail out if field accesses are not watched | |
| 1006 if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; | |
| 1007 | |
| 1008 switch(cp_entry->flag_state()) { | |
| 1009 case btos: // fall through | |
| 1010 case ctos: // fall through | |
| 1011 case stos: // fall through | |
| 1012 case itos: // fall through | |
| 1013 case ftos: // fall through | |
| 1014 case ltos: // fall through | |
| 1015 case dtos: // fall through | |
| 1016 case atos: break; | |
| 1017 default: ShouldNotReachHere(); return; | |
| 1018 } | |
| 1019 bool is_static = (obj == NULL); | |
| 1020 HandleMark hm(thread); | |
| 1021 | |
| 1022 Handle h_obj; | |
| 1023 if (!is_static) { | |
| 1024 // non-static field accessors have an object, but we need a handle | |
| 1025 h_obj = Handle(thread, obj); | |
| 1026 } | |
| 1027 instanceKlassHandle h_cp_entry_f1(thread, (klassOop)cp_entry->f1()); | |
| 1028 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); | |
| 1029 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); | |
| 1030 IRT_END | |
| 1031 | |
| 1032 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, | |
| 1033 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) | |
| 1034 | |
| 1035 klassOop k = (klassOop)cp_entry->f1(); | |
| 1036 | |
| 1037 // check the access_flags for the field in the klass | |
| 1038 instanceKlass* ik = instanceKlass::cast(k); | |
| 1039 typeArrayOop fields = ik->fields(); | |
| 1040 int index = cp_entry->field_index(); | |
| 1041 assert(index < fields->length(), "holders field index is out of range"); | |
| 1042 // bail out if field modifications are not watched | |
| 1043 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; | |
| 1044 | |
| 1045 char sig_type = '\0'; | |
| 1046 | |
| 1047 switch(cp_entry->flag_state()) { | |
| 1048 case btos: sig_type = 'Z'; break; | |
| 1049 case ctos: sig_type = 'C'; break; | |
| 1050 case stos: sig_type = 'S'; break; | |
| 1051 case itos: sig_type = 'I'; break; | |
| 1052 case ftos: sig_type = 'F'; break; | |
| 1053 case atos: sig_type = 'L'; break; | |
| 1054 case ltos: sig_type = 'J'; break; | |
| 1055 case dtos: sig_type = 'D'; break; | |
| 1056 default: ShouldNotReachHere(); return; | |
| 1057 } | |
| 1058 bool is_static = (obj == NULL); | |
| 1059 | |
| 1060 HandleMark hm(thread); | |
| 1061 instanceKlassHandle h_klass(thread, k); | |
| 1062 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static); | |
| 1063 jvalue fvalue; | |
| 1064 #ifdef _LP64 | |
| 1065 fvalue = *value; | |
| 1066 #else | |
| 1067 // Long/double values are stored unaligned and also noncontiguously with | |
| 1068 // tagged stacks. We can't just do a simple assignment even in the non- | |
| 1069 // J/D cases because a C++ compiler is allowed to assume that a jvalue is | |
| 1070 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. | |
| 1071 // We assume that the two halves of longs/doubles are stored in interpreter | |
| 1072 // stack slots in platform-endian order. | |
| 1073 jlong_accessor u; | |
| 1074 jint* newval = (jint*)value; | |
| 1075 u.words[0] = newval[0]; | |
| 1506 | 1076 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag |
| 0 | 1077 fvalue.j = u.long_value; |
| 1078 #endif // _LP64 | |
| 1079 | |
| 1080 Handle h_obj; | |
| 1081 if (!is_static) { | |
| 1082 // non-static field accessors have an object, but we need a handle | |
| 1083 h_obj = Handle(thread, obj); | |
| 1084 } | |
| 1085 | |
| 1086 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, | |
| 1087 fid, sig_type, &fvalue); | |
| 1088 IRT_END | |
| 1089 | |
| 1090 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) | |
| 1091 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); | |
| 1092 IRT_END | |
| 1093 | |
| 1094 | |
| 1095 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) | |
| 1096 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); | |
| 1097 IRT_END | |
| 1098 | |
| 1099 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) | |
| 1100 { | |
| 1101 return (Interpreter::contains(pc) ? 1 : 0); | |
| 1102 } | |
| 1103 IRT_END | |
| 1104 | |
| 1105 | |
| 1106 // Implementation of SignatureHandlerLibrary | |
| 1107 | |
| 1108 address SignatureHandlerLibrary::set_handler_blob() { | |
| 1109 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); | |
| 1110 if (handler_blob == NULL) { | |
| 1111 return NULL; | |
| 1112 } | |
| 1113 address handler = handler_blob->instructions_begin(); | |
| 1114 _handler_blob = handler_blob; | |
| 1115 _handler = handler; | |
| 1116 return handler; | |
| 1117 } | |
| 1118 | |
| 1119 void SignatureHandlerLibrary::initialize() { | |
| 1120 if (_fingerprints != NULL) { | |
| 1121 return; | |
| 1122 } | |
| 1123 if (set_handler_blob() == NULL) { | |
| 1124 vm_exit_out_of_memory(blob_size, "native signature handlers"); | |
| 1125 } | |
| 1126 | |
| 1127 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", | |
| 1128 SignatureHandlerLibrary::buffer_size); | |
| 1129 _buffer = bb->instructions_begin(); | |
| 1130 | |
| 1131 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true); | |
| 1132 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true); | |
| 1133 } | |
| 1134 | |
| 1135 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { | |
| 1136 address handler = _handler; | |
| 1137 int code_size = buffer->pure_code_size(); | |
| 1138 if (handler + code_size > _handler_blob->instructions_end()) { | |
| 1139 // get a new handler blob | |
| 1140 handler = set_handler_blob(); | |
| 1141 } | |
| 1142 if (handler != NULL) { | |
| 1143 memcpy(handler, buffer->code_begin(), code_size); | |
| 1144 pd_set_handler(handler); | |
| 1145 ICache::invalidate_range(handler, code_size); | |
| 1146 _handler = handler + code_size; | |
| 1147 } | |
| 1148 return handler; | |
| 1149 } | |
| 1150 | |
| 1151 void SignatureHandlerLibrary::add(methodHandle method) { | |
| 1152 if (method->signature_handler() == NULL) { | |
| 1153 // use slow signature handler if we can't do better | |
| 1154 int handler_index = -1; | |
| 1155 // check if we can use customized (fast) signature handler | |
| 1156 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { | |
| 1157 // use customized signature handler | |
| 1158 MutexLocker mu(SignatureHandlerLibrary_lock); | |
| 1159 // make sure data structure is initialized | |
| 1160 initialize(); | |
| 1161 // lookup method signature's fingerprint | |
| 1162 uint64_t fingerprint = Fingerprinter(method).fingerprint(); | |
| 1163 handler_index = _fingerprints->find(fingerprint); | |
| 1164 // create handler if necessary | |
| 1165 if (handler_index < 0) { | |
| 1166 ResourceMark rm; | |
| 1167 ptrdiff_t align_offset = (address) | |
| 1168 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; | |
| 1169 CodeBuffer buffer((address)(_buffer + align_offset), | |
| 1170 SignatureHandlerLibrary::buffer_size - align_offset); | |
| 1171 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); | |
| 1172 // copy into code heap | |
| 1173 address handler = set_handler(&buffer); | |
| 1174 if (handler == NULL) { | |
| 1175 // use slow signature handler | |
| 1176 } else { | |
| 1177 // debugging suppport | |
| 1178 if (PrintSignatureHandlers) { | |
| 1179 tty->cr(); | |
| 1180 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", | |
| 1181 _handlers->length(), | |
| 1182 (method->is_static() ? "static" : "receiver"), | |
| 1183 method->name_and_sig_as_C_string(), | |
| 1184 fingerprint, | |
| 1185 buffer.code_size()); | |
| 1186 Disassembler::decode(handler, handler + buffer.code_size()); | |
| 1187 #ifndef PRODUCT | |
| 1188 tty->print_cr(" --- associated result handler ---"); | |
| 1189 address rh_begin = Interpreter::result_handler(method()->result_type()); | |
| 1190 address rh_end = rh_begin; | |
| 1191 while (*(int*)rh_end != 0) { | |
| 1192 rh_end += sizeof(int); | |
| 1193 } | |
| 1194 Disassembler::decode(rh_begin, rh_end); | |
| 1195 #endif | |
| 1196 } | |
| 1197 // add handler to library | |
| 1198 _fingerprints->append(fingerprint); | |
| 1199 _handlers->append(handler); | |
| 1200 // set handler index | |
| 1201 assert(_fingerprints->length() == _handlers->length(), "sanity check"); | |
| 1202 handler_index = _fingerprints->length() - 1; | |
| 1203 } | |
| 1204 } | |
| 1205 } else { | |
| 1206 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
| 1207 } | |
| 1208 if (handler_index < 0) { | |
| 1209 // use generic signature handler | |
| 1210 method->set_signature_handler(Interpreter::slow_signature_handler()); | |
| 1211 } else { | |
| 1212 // set handler | |
| 1213 method->set_signature_handler(_handlers->at(handler_index)); | |
| 1214 } | |
| 1215 } | |
| 1216 assert(method->signature_handler() == Interpreter::slow_signature_handler() || | |
| 1217 _handlers->find(method->signature_handler()) == _fingerprints->find(Fingerprinter(method).fingerprint()), | |
| 1218 "sanity check"); | |
| 1219 } | |
| 1220 | |
| 1221 | |
| 1222 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; | |
| 1223 address SignatureHandlerLibrary::_handler = NULL; | |
| 1224 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; | |
| 1225 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; | |
| 1226 address SignatureHandlerLibrary::_buffer = NULL; | |
| 1227 | |
| 1228 | |
| 1229 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method)) | |
| 1230 methodHandle m(thread, method); | |
| 1231 assert(m->is_native(), "sanity check"); | |
| 1232 // lookup native function entry point if it doesn't exist | |
| 1233 bool in_base_library; | |
| 1234 if (!m->has_native_function()) { | |
| 1235 NativeLookup::lookup(m, in_base_library, CHECK); | |
| 1236 } | |
| 1237 // make sure signature handler is installed | |
| 1238 SignatureHandlerLibrary::add(m); | |
| 1239 // The interpreter entry point checks the signature handler first, | |
| 1240 // before trying to fetch the native entry point and klass mirror. | |
| 1241 // We must set the signature handler last, so that multiple processors | |
| 1242 // preparing the same method will be sure to see non-null entry & mirror. | |
| 1243 IRT_END | |
| 1244 | |
| 1245 #if defined(IA32) || defined(AMD64) | |
| 1246 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) | |
| 1247 if (src_address == dest_address) { | |
| 1248 return; | |
| 1249 } | |
| 1250 ResetNoHandleMark rnm; // In a LEAF entry. | |
| 1251 HandleMark hm; | |
| 1252 ResourceMark rm; | |
| 1253 frame fr = thread->last_frame(); | |
| 1254 assert(fr.is_interpreted_frame(), ""); | |
| 1255 jint bci = fr.interpreter_frame_bci(); | |
| 1256 methodHandle mh(thread, fr.interpreter_frame_method()); | |
| 1257 Bytecode_invoke* invoke = Bytecode_invoke_at(mh, bci); | |
| 1258 ArgumentSizeComputer asc(invoke->signature()); | |
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1259 int size_of_arguments = (asc.size() + (invoke->has_receiver() ? 1 : 0)); // receiver |
| 0 | 1260 Copy::conjoint_bytes(src_address, dest_address, |
| 1506 | 1261 size_of_arguments * Interpreter::stackElementSize); |
| 0 | 1262 IRT_END |
| 1263 #endif |