Mercurial > hg > truffle
annotate src/share/vm/interpreter/interpreterRuntime.cpp @ 2142:8012aa3ccede
4926272: methodOopDesc::method_from_bcp is unsafe
Reviewed-by: coleenp, jrose, kvn, dcubed
| author | never |
|---|---|
| date | Thu, 13 Jan 2011 22:15:41 -0800 |
| parents | 9bc798875b2a |
| children | 633a44a9fc45 |
| rev | line source |
|---|---|
| 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" | |
| 42 #include "oops/symbolOop.hpp" | |
| 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 | |
| 68 #ifdef COMPILER2 | |
| 69 #include "opto/runtime.hpp" | |
| 70 #endif | |
| 0 | 71 |
| 72 class UnlockFlagSaver { | |
| 73 private: | |
| 74 JavaThread* _thread; | |
| 75 bool _do_not_unlock; | |
| 76 public: | |
| 77 UnlockFlagSaver(JavaThread* t) { | |
| 78 _thread = t; | |
| 79 _do_not_unlock = t->do_not_unlock_if_synchronized(); | |
| 80 t->set_do_not_unlock_if_synchronized(false); | |
| 81 } | |
| 82 ~UnlockFlagSaver() { | |
| 83 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); | |
| 84 } | |
| 85 }; | |
| 86 | |
| 87 //------------------------------------------------------------------------------------------------------------------------ | |
| 88 // State accessors | |
| 89 | |
| 90 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { | |
| 91 last_frame(thread).interpreter_frame_set_bcp(bcp); | |
| 92 if (ProfileInterpreter) { | |
| 93 // ProfileTraps uses MDOs independently of ProfileInterpreter. | |
| 94 // That is why we must check both ProfileInterpreter and mdo != NULL. | |
| 95 methodDataOop mdo = last_frame(thread).interpreter_frame_method()->method_data(); | |
| 96 if (mdo != NULL) { | |
| 97 NEEDS_CLEANUP; | |
| 98 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); | |
| 99 } | |
| 100 } | |
| 101 } | |
| 102 | |
| 103 //------------------------------------------------------------------------------------------------------------------------ | |
| 104 // Constants | |
| 105 | |
| 106 | |
| 107 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) | |
| 108 // access constant pool | |
| 109 constantPoolOop pool = method(thread)->constants(); | |
| 1565 | 110 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); |
| 0 | 111 constantTag tag = pool->tag_at(index); |
| 112 | |
| 113 if (tag.is_unresolved_klass() || tag.is_klass()) { | |
| 114 klassOop klass = pool->klass_at(index, CHECK); | |
| 115 oop java_class = klass->klass_part()->java_mirror(); | |
| 116 thread->set_vm_result(java_class); | |
| 117 } else { | |
| 118 #ifdef ASSERT | |
| 119 // If we entered this runtime routine, we believed the tag contained | |
| 120 // an unresolved string, an unresolved class or a resolved class. | |
| 121 // However, another thread could have resolved the unresolved string | |
| 122 // or class by the time we go there. | |
| 123 assert(tag.is_unresolved_string()|| tag.is_string(), "expected string"); | |
| 124 #endif | |
| 125 oop s_oop = pool->string_at(index, CHECK); | |
| 126 thread->set_vm_result(s_oop); | |
| 127 } | |
| 128 IRT_END | |
| 129 | |
| 1602 | 130 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { |
| 131 assert(bytecode == Bytecodes::_fast_aldc || | |
| 132 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); | |
| 133 ResourceMark rm(thread); | |
| 134 methodHandle m (thread, method(thread)); | |
| 2142 | 135 Bytecode_loadconstant ldc(m, bci(thread)); |
| 136 oop result = ldc.resolve_constant(THREAD); | |
| 137 DEBUG_ONLY(ConstantPoolCacheEntry* cpce = m->constants()->cache()->entry_at(ldc.cache_index())); | |
| 1602 | 138 assert(result == cpce->f1(), "expected result for assembly code"); |
| 139 } | |
| 140 IRT_END | |
| 141 | |
| 0 | 142 |
| 143 //------------------------------------------------------------------------------------------------------------------------ | |
| 144 // Allocation | |
| 145 | |
| 146 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index)) | |
| 147 klassOop k_oop = pool->klass_at(index, CHECK); | |
| 148 instanceKlassHandle klass (THREAD, k_oop); | |
| 149 | |
| 150 // Make sure we are not instantiating an abstract klass | |
| 151 klass->check_valid_for_instantiation(true, CHECK); | |
| 152 | |
| 153 // Make sure klass is initialized | |
| 154 klass->initialize(CHECK); | |
| 155 | |
| 156 // At this point the class may not be fully initialized | |
| 157 // because of recursive initialization. If it is fully | |
| 158 // initialized & has_finalized is not set, we rewrite | |
| 159 // it into its fast version (Note: no locking is needed | |
| 160 // here since this is an atomic byte write and can be | |
| 161 // done more than once). | |
| 162 // | |
| 163 // Note: In case of classes with has_finalized we don't | |
| 164 // rewrite since that saves us an extra check in | |
| 165 // the fast version which then would call the | |
| 166 // slow version anyway (and do a call back into | |
| 167 // Java). | |
| 168 // If we have a breakpoint, then we don't rewrite | |
| 169 // because the _breakpoint bytecode would be lost. | |
| 170 oop obj = klass->allocate_instance(CHECK); | |
| 171 thread->set_vm_result(obj); | |
| 172 IRT_END | |
| 173 | |
| 174 | |
| 175 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) | |
| 176 oop obj = oopFactory::new_typeArray(type, size, CHECK); | |
| 177 thread->set_vm_result(obj); | |
| 178 IRT_END | |
| 179 | |
| 180 | |
| 181 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size)) | |
| 182 // Note: no oopHandle for pool & klass needed since they are not used | |
| 183 // anymore after new_objArray() and no GC can happen before. | |
| 184 // (This may have to change if this code changes!) | |
| 185 klassOop klass = pool->klass_at(index, CHECK); | |
| 186 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); | |
| 187 thread->set_vm_result(obj); | |
| 188 IRT_END | |
| 189 | |
| 190 | |
| 191 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) | |
| 192 // We may want to pass in more arguments - could make this slightly faster | |
| 193 constantPoolOop constants = method(thread)->constants(); | |
| 1565 | 194 int i = get_index_u2(thread, Bytecodes::_multianewarray); |
| 0 | 195 klassOop klass = constants->klass_at(i, CHECK); |
| 196 int nof_dims = number_of_dimensions(thread); | |
| 197 assert(oop(klass)->is_klass(), "not a class"); | |
| 198 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); | |
| 199 | |
| 200 // We must create an array of jints to pass to multi_allocate. | |
| 201 ResourceMark rm(thread); | |
| 202 const int small_dims = 10; | |
| 203 jint dim_array[small_dims]; | |
| 204 jint *dims = &dim_array[0]; | |
| 205 if (nof_dims > small_dims) { | |
| 206 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); | |
| 207 } | |
| 208 for (int index = 0; index < nof_dims; index++) { | |
| 209 // offset from first_size_address is addressed as local[index] | |
| 210 int n = Interpreter::local_offset_in_bytes(index)/jintSize; | |
| 211 dims[index] = first_size_address[n]; | |
| 212 } | |
| 213 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); | |
| 214 thread->set_vm_result(obj); | |
| 215 IRT_END | |
| 216 | |
| 217 | |
| 218 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
| 219 assert(obj->is_oop(), "must be a valid oop"); | |
| 220 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
| 221 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
| 222 IRT_END | |
| 223 | |
| 224 | |
| 225 // Quicken instance-of and check-cast bytecodes | |
| 226 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) | |
| 227 // Force resolving; quicken the bytecode | |
| 1565 | 228 int which = get_index_u2(thread, Bytecodes::_checkcast); |
| 0 | 229 constantPoolOop cpool = method(thread)->constants(); |
| 230 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded | |
| 231 // program we might have seen an unquick'd bytecode in the interpreter but have another | |
| 232 // thread quicken the bytecode before we get here. | |
| 233 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); | |
| 234 klassOop klass = cpool->klass_at(which, CHECK); | |
| 235 thread->set_vm_result(klass); | |
| 236 IRT_END | |
| 237 | |
| 238 | |
| 239 //------------------------------------------------------------------------------------------------------------------------ | |
| 240 // Exceptions | |
| 241 | |
| 242 // Assume the compiler is (or will be) interested in this event. | |
| 243 // If necessary, create an MDO to hold the information, and record it. | |
| 244 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { | |
| 245 assert(ProfileTraps, "call me only if profiling"); | |
| 246 methodHandle trap_method(thread, method(thread)); | |
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247 |
| 0 | 248 if (trap_method.not_null()) { |
| 249 methodDataHandle trap_mdo(thread, trap_method->method_data()); | |
| 250 if (trap_mdo.is_null()) { | |
| 251 methodOopDesc::build_interpreter_method_data(trap_method, THREAD); | |
| 252 if (HAS_PENDING_EXCEPTION) { | |
| 253 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
| 254 CLEAR_PENDING_EXCEPTION; | |
| 255 } | |
| 256 trap_mdo = methodDataHandle(thread, trap_method->method_data()); | |
| 257 // and fall through... | |
| 258 } | |
| 259 if (trap_mdo.not_null()) { | |
| 260 // Update per-method count of trap events. The interpreter | |
| 261 // is updating the MDO to simulate the effect of compiler traps. | |
| 262 int trap_bci = trap_method->bci_from(bcp(thread)); | |
| 263 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); | |
| 264 } | |
| 265 } | |
| 266 } | |
| 267 | |
| 268 static Handle get_preinitialized_exception(klassOop k, TRAPS) { | |
| 269 // get klass | |
| 270 instanceKlass* klass = instanceKlass::cast(k); | |
| 271 assert(klass->is_initialized(), | |
| 272 "this klass should have been initialized during VM initialization"); | |
| 273 // create instance - do not call constructor since we may have no | |
| 274 // (java) stack space left (should assert constructor is empty) | |
| 275 Handle exception; | |
| 276 oop exception_oop = klass->allocate_instance(CHECK_(exception)); | |
| 277 exception = Handle(THREAD, exception_oop); | |
| 278 if (StackTraceInThrowable) { | |
| 279 java_lang_Throwable::fill_in_stack_trace(exception); | |
| 280 } | |
| 281 return exception; | |
| 282 } | |
| 283 | |
| 284 // Special handling for stack overflow: since we don't have any (java) stack | |
| 285 // space left we use the pre-allocated & pre-initialized StackOverflowError | |
| 286 // klass to create an stack overflow error instance. We do not call its | |
| 287 // constructor for the same reason (it is empty, anyway). | |
| 288 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) | |
| 289 Handle exception = get_preinitialized_exception( | |
| 290 SystemDictionary::StackOverflowError_klass(), | |
| 291 CHECK); | |
| 292 THROW_HANDLE(exception); | |
| 293 IRT_END | |
| 294 | |
| 295 | |
| 296 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) | |
| 297 // lookup exception klass | |
| 298 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
| 299 if (ProfileTraps) { | |
| 300 if (s == vmSymbols::java_lang_ArithmeticException()) { | |
| 301 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); | |
| 302 } else if (s == vmSymbols::java_lang_NullPointerException()) { | |
| 303 note_trap(thread, Deoptimization::Reason_null_check, CHECK); | |
| 304 } | |
| 305 } | |
| 306 // create exception | |
| 307 Handle exception = Exceptions::new_exception(thread, s(), message); | |
| 308 thread->set_vm_result(exception()); | |
| 309 IRT_END | |
| 310 | |
| 311 | |
| 312 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) | |
| 313 ResourceMark rm(thread); | |
| 314 const char* klass_name = Klass::cast(obj->klass())->external_name(); | |
| 315 // lookup exception klass | |
| 316 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
| 317 if (ProfileTraps) { | |
| 318 note_trap(thread, Deoptimization::Reason_class_check, CHECK); | |
| 319 } | |
| 320 // create exception, with klass name as detail message | |
| 321 Handle exception = Exceptions::new_exception(thread, s(), klass_name); | |
| 322 thread->set_vm_result(exception()); | |
| 323 IRT_END | |
| 324 | |
| 325 | |
| 326 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) | |
| 327 char message[jintAsStringSize]; | |
| 328 // lookup exception klass | |
| 329 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
| 330 if (ProfileTraps) { | |
| 331 note_trap(thread, Deoptimization::Reason_range_check, CHECK); | |
| 332 } | |
| 333 // create exception | |
| 334 sprintf(message, "%d", index); | |
| 335 THROW_MSG(s(), message); | |
| 336 IRT_END | |
| 337 | |
| 338 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( | |
| 339 JavaThread* thread, oopDesc* obj)) | |
| 340 | |
| 341 ResourceMark rm(thread); | |
| 342 char* message = SharedRuntime::generate_class_cast_message( | |
| 343 thread, Klass::cast(obj->klass())->external_name()); | |
| 344 | |
| 345 if (ProfileTraps) { | |
| 346 note_trap(thread, Deoptimization::Reason_class_check, CHECK); | |
| 347 } | |
| 348 | |
| 349 // create exception | |
| 350 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); | |
| 351 IRT_END | |
| 352 | |
| 710 | 353 // required can be either a MethodType, or a Class (for a single argument) |
| 354 // actual (if not null) can be either a MethodHandle, or an arbitrary value (for a single argument) | |
| 355 IRT_ENTRY(void, InterpreterRuntime::throw_WrongMethodTypeException(JavaThread* thread, | |
| 356 oopDesc* required, | |
| 357 oopDesc* actual)) { | |
| 358 ResourceMark rm(thread); | |
| 359 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual); | |
| 360 | |
| 361 if (ProfileTraps) { | |
| 362 note_trap(thread, Deoptimization::Reason_constraint, CHECK); | |
| 363 } | |
| 364 | |
| 365 // create exception | |
| 366 THROW_MSG(vmSymbols::java_dyn_WrongMethodTypeException(), message); | |
| 367 } | |
| 368 IRT_END | |
| 369 | |
| 370 | |
| 0 | 371 |
| 372 // exception_handler_for_exception(...) returns the continuation address, | |
| 373 // the exception oop (via TLS) and sets the bci/bcp for the continuation. | |
| 374 // The exception oop is returned to make sure it is preserved over GC (it | |
| 375 // is only on the stack if the exception was thrown explicitly via athrow). | |
| 376 // During this operation, the expression stack contains the values for the | |
| 377 // bci where the exception happened. If the exception was propagated back | |
| 378 // from a call, the expression stack contains the values for the bci at the | |
| 379 // invoke w/o arguments (i.e., as if one were inside the call). | |
| 380 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) | |
| 381 | |
| 382 Handle h_exception(thread, exception); | |
| 383 methodHandle h_method (thread, method(thread)); | |
| 384 constantPoolHandle h_constants(thread, h_method->constants()); | |
| 385 typeArrayHandle h_extable (thread, h_method->exception_table()); | |
| 386 bool should_repeat; | |
| 387 int handler_bci; | |
| 1602 | 388 int current_bci = bci(thread); |
| 0 | 389 |
| 390 // Need to do this check first since when _do_not_unlock_if_synchronized | |
| 391 // is set, we don't want to trigger any classloading which may make calls | |
| 392 // into java, or surprisingly find a matching exception handler for bci 0 | |
| 393 // since at this moment the method hasn't been "officially" entered yet. | |
| 394 if (thread->do_not_unlock_if_synchronized()) { | |
| 395 ResourceMark rm; | |
| 396 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); | |
| 397 thread->set_vm_result(exception); | |
| 398 #ifdef CC_INTERP | |
| 399 return (address) -1; | |
| 400 #else | |
| 401 return Interpreter::remove_activation_entry(); | |
| 402 #endif | |
| 403 } | |
| 404 | |
| 405 do { | |
| 406 should_repeat = false; | |
| 407 | |
| 408 // assertions | |
| 409 #ifdef ASSERT | |
| 410 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); | |
| 411 assert(h_exception->is_oop(), "just checking"); | |
| 412 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError | |
| 1142 | 413 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { |
| 0 | 414 if (ExitVMOnVerifyError) vm_exit(-1); |
| 415 ShouldNotReachHere(); | |
| 416 } | |
| 417 #endif | |
| 418 | |
| 419 // tracing | |
| 420 if (TraceExceptions) { | |
| 421 ttyLocker ttyl; | |
| 422 ResourceMark rm(thread); | |
| 423 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); | |
| 424 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); | |
| 425 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); | |
| 426 } | |
| 427 // Don't go paging in something which won't be used. | |
| 428 // else if (h_extable->length() == 0) { | |
| 429 // // disabled for now - interpreter is not using shortcut yet | |
| 430 // // (shortcut is not to call runtime if we have no exception handlers) | |
| 431 // // warning("performance bug: should not call runtime if method has no exception handlers"); | |
| 432 // } | |
| 433 // for AbortVMOnException flag | |
| 434 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); | |
| 435 | |
| 436 // exception handler lookup | |
| 437 KlassHandle h_klass(THREAD, h_exception->klass()); | |
| 438 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); | |
| 439 if (HAS_PENDING_EXCEPTION) { | |
| 440 // We threw an exception while trying to find the exception handler. | |
| 441 // Transfer the new exception to the exception handle which will | |
| 442 // be set into thread local storage, and do another lookup for an | |
| 443 // exception handler for this exception, this time starting at the | |
| 444 // BCI of the exception handler which caused the exception to be | |
| 445 // thrown (bug 4307310). | |
| 446 h_exception = Handle(THREAD, PENDING_EXCEPTION); | |
| 447 CLEAR_PENDING_EXCEPTION; | |
| 448 if (handler_bci >= 0) { | |
| 449 current_bci = handler_bci; | |
| 450 should_repeat = true; | |
| 451 } | |
| 452 } | |
| 453 } while (should_repeat == true); | |
| 454 | |
| 455 // notify JVMTI of an exception throw; JVMTI will detect if this is a first | |
| 456 // time throw or a stack unwinding throw and accordingly notify the debugger | |
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457 if (JvmtiExport::can_post_on_exceptions()) { |
| 0 | 458 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); |
| 459 } | |
| 460 | |
| 461 #ifdef CC_INTERP | |
| 462 address continuation = (address)(intptr_t) handler_bci; | |
| 463 #else | |
| 464 address continuation = NULL; | |
| 465 #endif | |
| 466 address handler_pc = NULL; | |
| 467 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { | |
| 468 // Forward exception to callee (leaving bci/bcp untouched) because (a) no | |
| 469 // handler in this method, or (b) after a stack overflow there is not yet | |
| 470 // enough stack space available to reprotect the stack. | |
| 471 #ifndef CC_INTERP | |
| 472 continuation = Interpreter::remove_activation_entry(); | |
| 473 #endif | |
| 474 // Count this for compilation purposes | |
| 475 h_method->interpreter_throwout_increment(); | |
| 476 } else { | |
| 477 // handler in this method => change bci/bcp to handler bci/bcp and continue there | |
| 478 handler_pc = h_method->code_base() + handler_bci; | |
| 479 #ifndef CC_INTERP | |
| 480 set_bcp_and_mdp(handler_pc, thread); | |
| 481 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; | |
| 482 #endif | |
| 483 } | |
| 484 // notify debugger of an exception catch | |
| 485 // (this is good for exceptions caught in native methods as well) | |
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486 if (JvmtiExport::can_post_on_exceptions()) { |
| 0 | 487 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); |
| 488 } | |
| 489 | |
| 490 thread->set_vm_result(h_exception()); | |
| 491 return continuation; | |
| 492 IRT_END | |
| 493 | |
| 494 | |
| 495 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) | |
| 496 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); | |
| 497 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) | |
| 498 IRT_END | |
| 499 | |
| 500 | |
| 501 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
| 502 THROW(vmSymbols::java_lang_AbstractMethodError()); | |
| 503 IRT_END | |
| 504 | |
| 505 | |
| 506 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) | |
| 507 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); | |
| 508 IRT_END | |
| 509 | |
| 510 | |
| 511 //------------------------------------------------------------------------------------------------------------------------ | |
| 512 // Fields | |
| 513 // | |
| 514 | |
| 515 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) | |
| 516 // resolve field | |
| 517 FieldAccessInfo info; | |
| 518 constantPoolHandle pool(thread, method(thread)->constants()); | |
| 519 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); | |
| 520 | |
| 521 { | |
| 522 JvmtiHideSingleStepping jhss(thread); | |
| 1565 | 523 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode), |
| 0 | 524 bytecode, false, CHECK); |
| 525 } // end JvmtiHideSingleStepping | |
| 526 | |
| 527 // check if link resolution caused cpCache to be updated | |
| 528 if (already_resolved(thread)) return; | |
| 529 | |
| 530 // compute auxiliary field attributes | |
| 531 TosState state = as_TosState(info.field_type()); | |
| 532 | |
| 533 // We need to delay resolving put instructions on final fields | |
| 534 // until we actually invoke one. This is required so we throw | |
| 535 // exceptions at the correct place. If we do not resolve completely | |
| 536 // in the current pass, leaving the put_code set to zero will | |
| 537 // cause the next put instruction to reresolve. | |
| 538 bool is_put = (bytecode == Bytecodes::_putfield || | |
| 539 bytecode == Bytecodes::_putstatic); | |
| 540 Bytecodes::Code put_code = (Bytecodes::Code)0; | |
| 541 | |
| 542 // We also need to delay resolving getstatic instructions until the | |
| 543 // class is intitialized. This is required so that access to the static | |
| 544 // field will call the initialization function every time until the class | |
| 545 // is completely initialized ala. in 2.17.5 in JVM Specification. | |
| 546 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); | |
| 547 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && | |
| 548 !klass->is_initialized()); | |
| 549 Bytecodes::Code get_code = (Bytecodes::Code)0; | |
| 550 | |
| 551 | |
| 552 if (!uninitialized_static) { | |
| 553 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); | |
| 554 if (is_put || !info.access_flags().is_final()) { | |
| 555 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); | |
| 556 } | |
| 557 } | |
| 558 | |
| 559 cache_entry(thread)->set_field( | |
| 560 get_code, | |
| 561 put_code, | |
| 562 info.klass(), | |
| 563 info.field_index(), | |
| 564 info.field_offset(), | |
| 565 state, | |
| 566 info.access_flags().is_final(), | |
| 567 info.access_flags().is_volatile() | |
| 568 ); | |
| 569 IRT_END | |
| 570 | |
| 571 | |
| 572 //------------------------------------------------------------------------------------------------------------------------ | |
| 573 // Synchronization | |
| 574 // | |
| 575 // The interpreter's synchronization code is factored out so that it can | |
| 576 // be shared by method invocation and synchronized blocks. | |
| 577 //%note synchronization_3 | |
| 578 | |
| 579 static void trace_locking(Handle& h_locking_obj, bool is_locking) { | |
| 580 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); | |
| 581 } | |
| 582 | |
| 583 | |
| 584 //%note monitor_1 | |
| 585 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) | |
| 586 #ifdef ASSERT | |
| 587 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
| 588 #endif | |
| 589 if (PrintBiasedLockingStatistics) { | |
| 590 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
| 591 } | |
| 592 Handle h_obj(thread, elem->obj()); | |
| 593 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
| 594 "must be NULL or an object"); | |
| 595 if (UseBiasedLocking) { | |
| 596 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
| 597 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); | |
| 598 } else { | |
| 599 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); | |
| 600 } | |
| 601 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), | |
| 602 "must be NULL or an object"); | |
| 603 #ifdef ASSERT | |
| 604 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
| 605 #endif | |
| 606 IRT_END | |
| 607 | |
| 608 | |
| 609 //%note monitor_1 | |
| 610 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) | |
| 611 #ifdef ASSERT | |
| 612 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
| 613 #endif | |
| 614 Handle h_obj(thread, elem->obj()); | |
| 615 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
| 616 "must be NULL or an object"); | |
| 617 if (elem == NULL || h_obj()->is_unlocked()) { | |
| 618 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
| 619 } | |
| 620 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); | |
| 621 // Free entry. This must be done here, since a pending exception might be installed on | |
| 622 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. | |
| 623 elem->set_obj(NULL); | |
| 624 #ifdef ASSERT | |
| 625 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
| 626 #endif | |
| 627 IRT_END | |
| 628 | |
| 629 | |
| 630 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) | |
| 631 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
| 632 IRT_END | |
| 633 | |
| 634 | |
| 635 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) | |
| 636 // Returns an illegal exception to install into the current thread. The | |
| 637 // pending_exception flag is cleared so normal exception handling does not | |
| 638 // trigger. Any current installed exception will be overwritten. This | |
| 639 // method will be called during an exception unwind. | |
| 640 | |
| 641 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); | |
| 642 Handle exception(thread, thread->vm_result()); | |
| 643 assert(exception() != NULL, "vm result should be set"); | |
| 644 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) | |
| 1142 | 645 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
| 0 | 646 exception = get_preinitialized_exception( |
| 647 SystemDictionary::IllegalMonitorStateException_klass(), | |
| 648 CATCH); | |
| 649 } | |
| 650 thread->set_vm_result(exception()); | |
| 651 IRT_END | |
| 652 | |
| 653 | |
| 654 //------------------------------------------------------------------------------------------------------------------------ | |
| 655 // Invokes | |
| 656 | |
| 657 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) | |
| 658 return method->orig_bytecode_at(method->bci_from(bcp)); | |
| 659 IRT_END | |
| 660 | |
| 661 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) | |
| 662 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); | |
| 663 IRT_END | |
| 664 | |
| 665 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) | |
| 666 JvmtiExport::post_raw_breakpoint(thread, method, bcp); | |
| 667 IRT_END | |
| 668 | |
| 669 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) | |
| 670 // extract receiver from the outgoing argument list if necessary | |
| 671 Handle receiver(thread, NULL); | |
| 672 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { | |
| 673 ResourceMark rm(thread); | |
| 674 methodHandle m (thread, method(thread)); | |
| 2142 | 675 Bytecode_invoke call(m, bci(thread)); |
| 676 symbolHandle signature (thread, call.signature()); | |
| 0 | 677 receiver = Handle(thread, |
| 678 thread->last_frame().interpreter_callee_receiver(signature)); | |
| 679 assert(Universe::heap()->is_in_reserved_or_null(receiver()), | |
| 680 "sanity check"); | |
| 681 assert(receiver.is_null() || | |
| 682 Universe::heap()->is_in_reserved(receiver->klass()), | |
| 683 "sanity check"); | |
| 684 } | |
| 685 | |
| 686 // resolve method | |
| 687 CallInfo info; | |
| 688 constantPoolHandle pool(thread, method(thread)->constants()); | |
| 689 | |
| 690 { | |
| 691 JvmtiHideSingleStepping jhss(thread); | |
| 692 LinkResolver::resolve_invoke(info, receiver, pool, | |
| 1565 | 693 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
| 0 | 694 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { |
| 695 int retry_count = 0; | |
| 696 while (info.resolved_method()->is_old()) { | |
| 697 // It is very unlikely that method is redefined more than 100 times | |
| 698 // in the middle of resolve. If it is looping here more than 100 times | |
| 699 // means then there could be a bug here. | |
| 700 guarantee((retry_count++ < 100), | |
| 701 "Could not resolve to latest version of redefined method"); | |
| 702 // method is redefined in the middle of resolve so re-try. | |
| 703 LinkResolver::resolve_invoke(info, receiver, pool, | |
| 1565 | 704 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
| 0 | 705 } |
| 706 } | |
| 707 } // end JvmtiHideSingleStepping | |
| 708 | |
| 709 // check if link resolution caused cpCache to be updated | |
| 710 if (already_resolved(thread)) return; | |
| 711 | |
| 712 if (bytecode == Bytecodes::_invokeinterface) { | |
| 713 | |
| 714 if (TraceItables && Verbose) { | |
| 715 ResourceMark rm(thread); | |
| 716 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); | |
| 717 } | |
| 718 if (info.resolved_method()->method_holder() == | |
| 1142 | 719 SystemDictionary::Object_klass()) { |
| 0 | 720 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec |
| 721 // (see also cpCacheOop.cpp for details) | |
| 722 methodHandle rm = info.resolved_method(); | |
| 723 assert(rm->is_final() || info.has_vtable_index(), | |
| 724 "should have been set already"); | |
| 725 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); | |
| 726 } else { | |
| 727 // Setup itable entry | |
| 728 int index = klassItable::compute_itable_index(info.resolved_method()()); | |
| 729 cache_entry(thread)->set_interface_call(info.resolved_method(), index); | |
| 730 } | |
| 731 } else { | |
| 732 cache_entry(thread)->set_method( | |
| 733 bytecode, | |
| 734 info.resolved_method(), | |
| 735 info.vtable_index()); | |
| 736 } | |
| 737 IRT_END | |
| 738 | |
| 739 | |
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740 // First time execution: Resolve symbols, create a permanent CallSite object. |
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741 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { |
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742 ResourceMark rm(thread); |
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743 |
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744 assert(EnableInvokeDynamic, ""); |
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745 |
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746 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; |
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747 |
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748 methodHandle caller_method(thread, method(thread)); |
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749 |
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750 constantPoolHandle pool(thread, caller_method->constants()); |
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751 pool->set_invokedynamic(); // mark header to flag active call sites |
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752 |
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753 int caller_bci = 0; |
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754 int site_index = 0; |
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755 { address caller_bcp = bcp(thread); |
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756 caller_bci = caller_method->bci_from(caller_bcp); |
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757 site_index = Bytes::get_native_u4(caller_bcp+1); |
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758 } |
| 2142 | 759 assert(site_index == InterpreterRuntime::bytecode(thread).get_index_u4(bytecode), ""); |
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760 assert(constantPoolCacheOopDesc::is_secondary_index(site_index), "proper format"); |
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761 // there is a second CPC entries that is of interest; it caches signature info: |
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762 int main_index = pool->cache()->secondary_entry_at(site_index)->main_entry_index(); |
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763 int pool_index = pool->cache()->entry_at(main_index)->constant_pool_index(); |
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764 |
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765 // first resolve the signature to a MH.invoke methodOop |
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766 if (!pool->cache()->entry_at(main_index)->is_resolved(bytecode)) { |
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767 JvmtiHideSingleStepping jhss(thread); |
| 1903 | 768 CallInfo callinfo; |
| 769 LinkResolver::resolve_invoke(callinfo, Handle(), pool, | |
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770 site_index, bytecode, CHECK); |
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771 // The main entry corresponds to a JVM_CONSTANT_InvokeDynamic, and serves |
|
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772 // as a common reference point for all invokedynamic call sites with |
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773 // that exact call descriptor. We will link it in the CP cache exactly |
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774 // as if it were an invokevirtual of MethodHandle.invoke. |
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775 pool->cache()->entry_at(main_index)->set_method( |
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776 bytecode, |
| 1903 | 777 callinfo.resolved_method(), |
| 778 callinfo.vtable_index()); | |
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779 } |
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780 |
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781 // The method (f2 entry) of the main entry is the MH.invoke for the |
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782 // invokedynamic target call signature. |
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783 oop f1_value = pool->cache()->entry_at(main_index)->f1(); |
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784 methodHandle signature_invoker(THREAD, (methodOop) f1_value); |
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785 assert(signature_invoker.not_null() && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(), |
|
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786 "correct result from LinkResolver::resolve_invokedynamic"); |
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787 |
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788 Handle info; // optional argument(s) in JVM_CONSTANT_InvokeDynamic |
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789 Handle bootm = SystemDictionary::find_bootstrap_method(caller_method, caller_bci, |
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790 main_index, info, CHECK); |
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791 if (!java_dyn_MethodHandle::is_instance(bootm())) { |
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792 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), |
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793 "no bootstrap method found for invokedynamic"); |
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794 } |
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795 |
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796 // Short circuit if CallSite has been bound already: |
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797 if (!pool->cache()->secondary_entry_at(site_index)->is_f1_null()) |
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798 return; |
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799 |
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800 symbolHandle call_site_name(THREAD, pool->name_ref_at(site_index)); |
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801 |
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802 Handle call_site |
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803 = SystemDictionary::make_dynamic_call_site(bootm, |
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804 // Callee information: |
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805 call_site_name, |
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806 signature_invoker, |
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807 info, |
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808 // Caller information: |
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809 caller_method, |
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810 caller_bci, |
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811 CHECK); |
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812 |
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813 // In the secondary entry, the f1 field is the call site, and the f2 (index) |
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814 // field is some data about the invoke site. Currently, it is just the BCI. |
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815 // Later, it might be changed to help manage inlining dependencies. |
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816 pool->cache()->secondary_entry_at(site_index)->set_dynamic_call(call_site, signature_invoker); |
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817 } |
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818 IRT_END |
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819 |
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820 |
| 0 | 821 //------------------------------------------------------------------------------------------------------------------------ |
| 822 // Miscellaneous | |
| 823 | |
| 824 | |
| 941 | 825 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { |
| 826 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); | |
| 827 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); | |
| 828 if (branch_bcp != NULL && nm != NULL) { | |
| 829 // This was a successful request for an OSR nmethod. Because | |
| 830 // frequency_counter_overflow_inner ends with a safepoint check, | |
| 831 // nm could have been unloaded so look it up again. It's unsafe | |
| 832 // to examine nm directly since it might have been freed and used | |
| 833 // for something else. | |
| 834 frame fr = thread->last_frame(); | |
| 835 methodOop method = fr.interpreter_frame_method(); | |
| 836 int bci = method->bci_from(fr.interpreter_frame_bcp()); | |
| 1783 | 837 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); |
| 941 | 838 } |
| 839 return nm; | |
| 840 } | |
| 841 | |
| 0 | 842 IRT_ENTRY(nmethod*, |
| 941 | 843 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) |
| 0 | 844 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
| 845 // flag, in case this method triggers classloading which will call into Java. | |
| 846 UnlockFlagSaver fs(thread); | |
| 847 | |
| 848 frame fr = thread->last_frame(); | |
| 849 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
| 850 methodHandle method(thread, fr.interpreter_frame_method()); | |
| 1783 | 851 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; |
| 852 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; | |
| 853 | |
| 854 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, thread); | |
| 0 | 855 |
| 1783 | 856 if (osr_nm != NULL) { |
| 857 // We may need to do on-stack replacement which requires that no | |
| 858 // monitors in the activation are biased because their | |
| 859 // BasicObjectLocks will need to migrate during OSR. Force | |
| 860 // unbiasing of all monitors in the activation now (even though | |
| 861 // the OSR nmethod might be invalidated) because we don't have a | |
| 862 // safepoint opportunity later once the migration begins. | |
| 863 if (UseBiasedLocking) { | |
| 864 ResourceMark rm; | |
| 865 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 866 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
| 867 kptr < fr.interpreter_frame_monitor_begin(); | |
| 868 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
| 869 if( kptr->obj() != NULL ) { | |
| 870 objects_to_revoke->append(Handle(THREAD, kptr->obj())); | |
| 871 } | |
| 0 | 872 } |
| 1783 | 873 BiasedLocking::revoke(objects_to_revoke); |
| 0 | 874 } |
| 875 } | |
| 1783 | 876 return osr_nm; |
| 0 | 877 IRT_END |
| 878 | |
| 879 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) | |
| 880 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 881 int bci = method->bci_from(cur_bcp); | |
| 882 methodDataOop mdo = method->method_data(); | |
| 883 if (mdo == NULL) return 0; | |
| 884 return mdo->bci_to_di(bci); | |
| 885 IRT_END | |
| 886 | |
| 887 IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp)) | |
| 888 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized | |
| 889 // flag, in case this method triggers classloading which will call into Java. | |
| 890 UnlockFlagSaver fs(thread); | |
| 891 | |
| 892 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 893 frame fr = thread->last_frame(); | |
| 894 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
| 895 methodHandle method(thread, fr.interpreter_frame_method()); | |
| 896 int bci = method->bci_from(cur_bcp); | |
| 897 methodOopDesc::build_interpreter_method_data(method, THREAD); | |
| 898 if (HAS_PENDING_EXCEPTION) { | |
| 899 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
| 900 CLEAR_PENDING_EXCEPTION; | |
| 901 // and fall through... | |
| 902 } | |
| 903 methodDataOop mdo = method->method_data(); | |
| 904 if (mdo == NULL) return 0; | |
| 905 return mdo->bci_to_di(bci); | |
| 906 IRT_END | |
| 907 | |
| 908 | |
| 909 #ifdef ASSERT | |
| 910 IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) | |
| 911 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 912 | |
| 913 methodDataOop mdo = method->method_data(); | |
| 914 assert(mdo != NULL, "must not be null"); | |
| 915 | |
| 916 int bci = method->bci_from(bcp); | |
| 917 | |
| 918 address mdp2 = mdo->bci_to_dp(bci); | |
| 919 if (mdp != mdp2) { | |
| 920 ResourceMark rm; | |
| 921 ResetNoHandleMark rnm; // In a LEAF entry. | |
| 922 HandleMark hm; | |
| 923 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); | |
| 924 int current_di = mdo->dp_to_di(mdp); | |
| 925 int expected_di = mdo->dp_to_di(mdp2); | |
| 926 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); | |
| 927 int expected_approx_bci = mdo->data_at(expected_di)->bci(); | |
| 928 int approx_bci = -1; | |
| 929 if (current_di >= 0) { | |
| 930 approx_bci = mdo->data_at(current_di)->bci(); | |
| 931 } | |
| 932 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); | |
| 933 mdo->print_on(tty); | |
| 934 method->print_codes(); | |
| 935 } | |
| 936 assert(mdp == mdp2, "wrong mdp"); | |
| 937 IRT_END | |
| 938 #endif // ASSERT | |
| 939 | |
| 940 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) | |
| 941 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 942 ResourceMark rm(thread); | |
| 943 HandleMark hm(thread); | |
| 944 frame fr = thread->last_frame(); | |
| 945 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
| 946 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); | |
| 947 | |
| 948 // Grab a lock to ensure atomic access to setting the return bci and | |
| 949 // the displacement. This can block and GC, invalidating all naked oops. | |
| 950 MutexLocker ml(RetData_lock); | |
| 951 | |
| 952 // ProfileData is essentially a wrapper around a derived oop, so we | |
| 953 // need to take the lock before making any ProfileData structures. | |
| 954 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); | |
| 955 RetData* rdata = data->as_RetData(); | |
| 956 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); | |
| 957 fr.interpreter_frame_set_mdp(new_mdp); | |
| 958 IRT_END | |
| 959 | |
| 960 | |
| 961 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) | |
| 962 // We used to need an explict preserve_arguments here for invoke bytecodes. However, | |
| 963 // stack traversal automatically takes care of preserving arguments for invoke, so | |
| 964 // this is no longer needed. | |
| 965 | |
| 966 // IRT_END does an implicit safepoint check, hence we are guaranteed to block | |
| 967 // if this is called during a safepoint | |
| 968 | |
| 969 if (JvmtiExport::should_post_single_step()) { | |
| 970 // We are called during regular safepoints and when the VM is | |
| 971 // single stepping. If any thread is marked for single stepping, | |
| 972 // then we may have JVMTI work to do. | |
| 973 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); | |
| 974 } | |
| 975 IRT_END | |
| 976 | |
| 977 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, | |
| 978 ConstantPoolCacheEntry *cp_entry)) | |
| 979 | |
| 980 // check the access_flags for the field in the klass | |
| 981 instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1()); | |
| 982 typeArrayOop fields = ik->fields(); | |
| 983 int index = cp_entry->field_index(); | |
| 984 assert(index < fields->length(), "holders field index is out of range"); | |
| 985 // bail out if field accesses are not watched | |
| 986 if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; | |
| 987 | |
| 988 switch(cp_entry->flag_state()) { | |
| 989 case btos: // fall through | |
| 990 case ctos: // fall through | |
| 991 case stos: // fall through | |
| 992 case itos: // fall through | |
| 993 case ftos: // fall through | |
| 994 case ltos: // fall through | |
| 995 case dtos: // fall through | |
| 996 case atos: break; | |
| 997 default: ShouldNotReachHere(); return; | |
| 998 } | |
| 999 bool is_static = (obj == NULL); | |
| 1000 HandleMark hm(thread); | |
| 1001 | |
| 1002 Handle h_obj; | |
| 1003 if (!is_static) { | |
| 1004 // non-static field accessors have an object, but we need a handle | |
| 1005 h_obj = Handle(thread, obj); | |
| 1006 } | |
| 1007 instanceKlassHandle h_cp_entry_f1(thread, (klassOop)cp_entry->f1()); | |
| 1008 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); | |
| 1009 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); | |
| 1010 IRT_END | |
| 1011 | |
| 1012 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, | |
| 1013 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) | |
| 1014 | |
| 1015 klassOop k = (klassOop)cp_entry->f1(); | |
| 1016 | |
| 1017 // check the access_flags for the field in the klass | |
| 1018 instanceKlass* ik = instanceKlass::cast(k); | |
| 1019 typeArrayOop fields = ik->fields(); | |
| 1020 int index = cp_entry->field_index(); | |
| 1021 assert(index < fields->length(), "holders field index is out of range"); | |
| 1022 // bail out if field modifications are not watched | |
| 1023 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; | |
| 1024 | |
| 1025 char sig_type = '\0'; | |
| 1026 | |
| 1027 switch(cp_entry->flag_state()) { | |
| 1028 case btos: sig_type = 'Z'; break; | |
| 1029 case ctos: sig_type = 'C'; break; | |
| 1030 case stos: sig_type = 'S'; break; | |
| 1031 case itos: sig_type = 'I'; break; | |
| 1032 case ftos: sig_type = 'F'; break; | |
| 1033 case atos: sig_type = 'L'; break; | |
| 1034 case ltos: sig_type = 'J'; break; | |
| 1035 case dtos: sig_type = 'D'; break; | |
| 1036 default: ShouldNotReachHere(); return; | |
| 1037 } | |
| 1038 bool is_static = (obj == NULL); | |
| 1039 | |
| 1040 HandleMark hm(thread); | |
| 1041 instanceKlassHandle h_klass(thread, k); | |
| 1042 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static); | |
| 1043 jvalue fvalue; | |
| 1044 #ifdef _LP64 | |
| 1045 fvalue = *value; | |
| 1046 #else | |
| 1047 // Long/double values are stored unaligned and also noncontiguously with | |
| 1048 // tagged stacks. We can't just do a simple assignment even in the non- | |
| 1049 // J/D cases because a C++ compiler is allowed to assume that a jvalue is | |
| 1050 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. | |
| 1051 // We assume that the two halves of longs/doubles are stored in interpreter | |
| 1052 // stack slots in platform-endian order. | |
| 1053 jlong_accessor u; | |
| 1054 jint* newval = (jint*)value; | |
| 1055 u.words[0] = newval[0]; | |
| 1506 | 1056 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag |
| 0 | 1057 fvalue.j = u.long_value; |
| 1058 #endif // _LP64 | |
| 1059 | |
| 1060 Handle h_obj; | |
| 1061 if (!is_static) { | |
| 1062 // non-static field accessors have an object, but we need a handle | |
| 1063 h_obj = Handle(thread, obj); | |
| 1064 } | |
| 1065 | |
| 1066 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, | |
| 1067 fid, sig_type, &fvalue); | |
| 1068 IRT_END | |
| 1069 | |
| 1070 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) | |
| 1071 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); | |
| 1072 IRT_END | |
| 1073 | |
| 1074 | |
| 1075 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) | |
| 1076 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); | |
| 1077 IRT_END | |
| 1078 | |
| 1079 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) | |
| 1080 { | |
| 1081 return (Interpreter::contains(pc) ? 1 : 0); | |
| 1082 } | |
| 1083 IRT_END | |
| 1084 | |
| 1085 | |
| 1086 // Implementation of SignatureHandlerLibrary | |
| 1087 | |
| 1088 address SignatureHandlerLibrary::set_handler_blob() { | |
| 1089 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); | |
| 1090 if (handler_blob == NULL) { | |
| 1091 return NULL; | |
| 1092 } | |
| 1748 | 1093 address handler = handler_blob->code_begin(); |
| 0 | 1094 _handler_blob = handler_blob; |
| 1095 _handler = handler; | |
| 1096 return handler; | |
| 1097 } | |
| 1098 | |
| 1099 void SignatureHandlerLibrary::initialize() { | |
| 1100 if (_fingerprints != NULL) { | |
| 1101 return; | |
| 1102 } | |
| 1103 if (set_handler_blob() == NULL) { | |
| 1104 vm_exit_out_of_memory(blob_size, "native signature handlers"); | |
| 1105 } | |
| 1106 | |
| 1107 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", | |
| 1108 SignatureHandlerLibrary::buffer_size); | |
| 1748 | 1109 _buffer = bb->code_begin(); |
| 0 | 1110 |
| 1111 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true); | |
| 1112 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true); | |
| 1113 } | |
| 1114 | |
| 1115 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { | |
| 1116 address handler = _handler; | |
| 1748 | 1117 int insts_size = buffer->pure_insts_size(); |
| 1118 if (handler + insts_size > _handler_blob->code_end()) { | |
| 0 | 1119 // get a new handler blob |
| 1120 handler = set_handler_blob(); | |
| 1121 } | |
| 1122 if (handler != NULL) { | |
| 1748 | 1123 memcpy(handler, buffer->insts_begin(), insts_size); |
| 0 | 1124 pd_set_handler(handler); |
| 1748 | 1125 ICache::invalidate_range(handler, insts_size); |
| 1126 _handler = handler + insts_size; | |
| 0 | 1127 } |
| 1128 return handler; | |
| 1129 } | |
| 1130 | |
| 1131 void SignatureHandlerLibrary::add(methodHandle method) { | |
| 1132 if (method->signature_handler() == NULL) { | |
| 1133 // use slow signature handler if we can't do better | |
| 1134 int handler_index = -1; | |
| 1135 // check if we can use customized (fast) signature handler | |
| 1136 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { | |
| 1137 // use customized signature handler | |
| 1138 MutexLocker mu(SignatureHandlerLibrary_lock); | |
| 1139 // make sure data structure is initialized | |
| 1140 initialize(); | |
| 1141 // lookup method signature's fingerprint | |
| 1142 uint64_t fingerprint = Fingerprinter(method).fingerprint(); | |
| 1143 handler_index = _fingerprints->find(fingerprint); | |
| 1144 // create handler if necessary | |
| 1145 if (handler_index < 0) { | |
| 1146 ResourceMark rm; | |
| 1147 ptrdiff_t align_offset = (address) | |
| 1148 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; | |
| 1149 CodeBuffer buffer((address)(_buffer + align_offset), | |
| 1150 SignatureHandlerLibrary::buffer_size - align_offset); | |
| 1151 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); | |
| 1152 // copy into code heap | |
| 1153 address handler = set_handler(&buffer); | |
| 1154 if (handler == NULL) { | |
| 1155 // use slow signature handler | |
| 1156 } else { | |
| 1157 // debugging suppport | |
| 1158 if (PrintSignatureHandlers) { | |
| 1159 tty->cr(); | |
| 1160 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", | |
| 1161 _handlers->length(), | |
| 1162 (method->is_static() ? "static" : "receiver"), | |
| 1163 method->name_and_sig_as_C_string(), | |
| 1164 fingerprint, | |
| 1748 | 1165 buffer.insts_size()); |
| 1166 Disassembler::decode(handler, handler + buffer.insts_size()); | |
| 0 | 1167 #ifndef PRODUCT |
| 1168 tty->print_cr(" --- associated result handler ---"); | |
| 1169 address rh_begin = Interpreter::result_handler(method()->result_type()); | |
| 1170 address rh_end = rh_begin; | |
| 1171 while (*(int*)rh_end != 0) { | |
| 1172 rh_end += sizeof(int); | |
| 1173 } | |
| 1174 Disassembler::decode(rh_begin, rh_end); | |
| 1175 #endif | |
| 1176 } | |
| 1177 // add handler to library | |
| 1178 _fingerprints->append(fingerprint); | |
| 1179 _handlers->append(handler); | |
| 1180 // set handler index | |
| 1181 assert(_fingerprints->length() == _handlers->length(), "sanity check"); | |
| 1182 handler_index = _fingerprints->length() - 1; | |
| 1183 } | |
| 1184 } | |
| 1185 } else { | |
| 1186 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
| 1187 } | |
| 1188 if (handler_index < 0) { | |
| 1189 // use generic signature handler | |
| 1190 method->set_signature_handler(Interpreter::slow_signature_handler()); | |
| 1191 } else { | |
| 1192 // set handler | |
| 1193 method->set_signature_handler(_handlers->at(handler_index)); | |
| 1194 } | |
| 1195 } | |
|
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9bc798875b2a
6704010: Internal Error (src/share/vm/interpreter/interpreterRuntime.cpp:1106)
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diff
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1196 #ifdef ASSERT |
|
9bc798875b2a
6704010: Internal Error (src/share/vm/interpreter/interpreterRuntime.cpp:1106)
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1197 int handler_index, fingerprint_index; |
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1198 { |
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1199 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized |
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1200 // in any way if accessed from multiple threads. To avoid races with another |
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1201 // thread which may change the arrays in the above, mutex protected block, we |
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1202 // have to protect this read access here with the same mutex as well! |
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1203 MutexLocker mu(SignatureHandlerLibrary_lock); |
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1204 handler_index = _handlers->find(method->signature_handler()); |
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1205 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); |
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1206 } |
| 0 | 1207 assert(method->signature_handler() == Interpreter::slow_signature_handler() || |
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1986
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1208 handler_index == fingerprint_index, "sanity check"); |
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1209 #endif |
| 0 | 1210 } |
| 1211 | |
| 1212 | |
| 1213 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; | |
| 1214 address SignatureHandlerLibrary::_handler = NULL; | |
| 1215 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; | |
| 1216 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; | |
| 1217 address SignatureHandlerLibrary::_buffer = NULL; | |
| 1218 | |
| 1219 | |
| 1220 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method)) | |
| 1221 methodHandle m(thread, method); | |
| 1222 assert(m->is_native(), "sanity check"); | |
| 1223 // lookup native function entry point if it doesn't exist | |
| 1224 bool in_base_library; | |
| 1225 if (!m->has_native_function()) { | |
| 1226 NativeLookup::lookup(m, in_base_library, CHECK); | |
| 1227 } | |
| 1228 // make sure signature handler is installed | |
| 1229 SignatureHandlerLibrary::add(m); | |
| 1230 // The interpreter entry point checks the signature handler first, | |
| 1231 // before trying to fetch the native entry point and klass mirror. | |
| 1232 // We must set the signature handler last, so that multiple processors | |
| 1233 // preparing the same method will be sure to see non-null entry & mirror. | |
| 1234 IRT_END | |
| 1235 | |
| 1236 #if defined(IA32) || defined(AMD64) | |
| 1237 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) | |
| 1238 if (src_address == dest_address) { | |
| 1239 return; | |
| 1240 } | |
| 1241 ResetNoHandleMark rnm; // In a LEAF entry. | |
| 1242 HandleMark hm; | |
| 1243 ResourceMark rm; | |
| 1244 frame fr = thread->last_frame(); | |
| 1245 assert(fr.is_interpreted_frame(), ""); | |
| 1246 jint bci = fr.interpreter_frame_bci(); | |
| 1247 methodHandle mh(thread, fr.interpreter_frame_method()); | |
| 2142 | 1248 Bytecode_invoke invoke(mh, bci); |
| 1249 ArgumentSizeComputer asc(invoke.signature()); | |
| 1250 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver | |
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1251 Copy::conjoint_jbytes(src_address, dest_address, |
| 1506 | 1252 size_of_arguments * Interpreter::stackElementSize); |
| 0 | 1253 IRT_END |
| 1254 #endif |