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--- old/src/share/vm/interpreter/interpreterRuntime.cpp
+++ new/src/share/vm/interpreter/interpreterRuntime.cpp
1 1 /*
2 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 20 * or visit www.oracle.com if you need additional information or have any
21 21 * questions.
22 22 *
23 23 */
24 24
25 25 #include "precompiled.hpp"
26 26 #include "classfile/systemDictionary.hpp"
27 27 #include "classfile/vmSymbols.hpp"
28 28 #include "compiler/compileBroker.hpp"
29 29 #include "gc_interface/collectedHeap.hpp"
30 30 #include "interpreter/interpreter.hpp"
31 31 #include "interpreter/interpreterRuntime.hpp"
32 32 #include "interpreter/linkResolver.hpp"
33 33 #include "interpreter/templateTable.hpp"
34 34 #include "memory/oopFactory.hpp"
35 35 #include "memory/universe.inline.hpp"
36 36 #include "oops/constantPool.hpp"
37 37 #include "oops/instanceKlass.hpp"
38 38 #include "oops/methodData.hpp"
39 39 #include "oops/objArrayKlass.hpp"
40 40 #include "oops/oop.inline.hpp"
41 41 #include "oops/symbol.hpp"
42 42 #include "prims/jvmtiExport.hpp"
43 43 #include "prims/nativeLookup.hpp"
44 44 #include "runtime/biasedLocking.hpp"
45 45 #include "runtime/compilationPolicy.hpp"
46 46 #include "runtime/deoptimization.hpp"
47 47 #include "runtime/fieldDescriptor.hpp"
48 48 #include "runtime/handles.inline.hpp"
49 49 #include "runtime/interfaceSupport.hpp"
50 50 #include "runtime/java.hpp"
51 51 #include "runtime/jfieldIDWorkaround.hpp"
52 52 #include "runtime/osThread.hpp"
53 53 #include "runtime/sharedRuntime.hpp"
54 54 #include "runtime/stubRoutines.hpp"
55 55 #include "runtime/synchronizer.hpp"
56 56 #include "runtime/threadCritical.hpp"
57 57 #include "utilities/events.hpp"
58 58 #ifdef TARGET_ARCH_x86
59 59 # include "vm_version_x86.hpp"
60 60 #endif
61 61 #ifdef TARGET_ARCH_sparc
62 62 # include "vm_version_sparc.hpp"
63 63 #endif
64 64 #ifdef TARGET_ARCH_zero
65 65 # include "vm_version_zero.hpp"
66 66 #endif
67 67 #ifdef TARGET_ARCH_arm
68 68 # include "vm_version_arm.hpp"
69 69 #endif
70 70 #ifdef TARGET_ARCH_ppc
71 71 # include "vm_version_ppc.hpp"
72 72 #endif
73 73 #ifdef COMPILER2
74 74 #include "opto/runtime.hpp"
75 75 #endif
76 76
77 77 class UnlockFlagSaver {
78 78 private:
79 79 JavaThread* _thread;
80 80 bool _do_not_unlock;
81 81 public:
82 82 UnlockFlagSaver(JavaThread* t) {
83 83 _thread = t;
84 84 _do_not_unlock = t->do_not_unlock_if_synchronized();
85 85 t->set_do_not_unlock_if_synchronized(false);
86 86 }
87 87 ~UnlockFlagSaver() {
88 88 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
89 89 }
90 90 };
91 91
92 92 //------------------------------------------------------------------------------------------------------------------------
93 93 // State accessors
94 94
95 95 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
96 96 last_frame(thread).interpreter_frame_set_bcp(bcp);
97 97 if (ProfileInterpreter) {
98 98 // ProfileTraps uses MDOs independently of ProfileInterpreter.
99 99 // That is why we must check both ProfileInterpreter and mdo != NULL.
100 100 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
101 101 if (mdo != NULL) {
102 102 NEEDS_CLEANUP;
103 103 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
104 104 }
105 105 }
106 106 }
107 107
108 108 //------------------------------------------------------------------------------------------------------------------------
109 109 // Constants
110 110
111 111
112 112 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
113 113 // access constant pool
114 114 ConstantPool* pool = method(thread)->constants();
115 115 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
116 116 constantTag tag = pool->tag_at(index);
117 117
118 118 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
119 119 Klass* klass = pool->klass_at(index, CHECK);
120 120 oop java_class = klass->java_mirror();
121 121 thread->set_vm_result(java_class);
122 122 IRT_END
123 123
124 124 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
125 125 assert(bytecode == Bytecodes::_fast_aldc ||
126 126 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
127 127 ResourceMark rm(thread);
128 128 methodHandle m (thread, method(thread));
129 129 Bytecode_loadconstant ldc(m, bci(thread));
130 130 oop result = ldc.resolve_constant(CHECK);
131 131 #ifdef ASSERT
132 132 {
133 133 // The bytecode wrappers aren't GC-safe so construct a new one
134 134 Bytecode_loadconstant ldc2(m, bci(thread));
135 135 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
136 136 assert(result == coop, "expected result for assembly code");
137 137 }
138 138 #endif
139 139 thread->set_vm_result(result);
140 140 }
141 141 IRT_END
142 142
143 143
144 144 //------------------------------------------------------------------------------------------------------------------------
145 145 // Allocation
146 146
147 147 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
148 148 Klass* k_oop = pool->klass_at(index, CHECK);
149 149 instanceKlassHandle klass (THREAD, k_oop);
150 150
151 151 // Make sure we are not instantiating an abstract klass
152 152 klass->check_valid_for_instantiation(true, CHECK);
153 153
154 154 // Make sure klass is initialized
155 155 klass->initialize(CHECK);
156 156
157 157 // At this point the class may not be fully initialized
158 158 // because of recursive initialization. If it is fully
159 159 // initialized & has_finalized is not set, we rewrite
160 160 // it into its fast version (Note: no locking is needed
161 161 // here since this is an atomic byte write and can be
162 162 // done more than once).
163 163 //
164 164 // Note: In case of classes with has_finalized we don't
165 165 // rewrite since that saves us an extra check in
166 166 // the fast version which then would call the
167 167 // slow version anyway (and do a call back into
168 168 // Java).
169 169 // If we have a breakpoint, then we don't rewrite
170 170 // because the _breakpoint bytecode would be lost.
171 171 oop obj = klass->allocate_instance(CHECK);
172 172 thread->set_vm_result(obj);
173 173 IRT_END
174 174
175 175
176 176 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
177 177 oop obj = oopFactory::new_typeArray(type, size, CHECK);
178 178 thread->set_vm_result(obj);
179 179 IRT_END
180 180
181 181
182 182 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
183 183 // Note: no oopHandle for pool & klass needed since they are not used
184 184 // anymore after new_objArray() and no GC can happen before.
185 185 // (This may have to change if this code changes!)
186 186 Klass* klass = pool->klass_at(index, CHECK);
187 187 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
188 188 thread->set_vm_result(obj);
189 189 IRT_END
190 190
191 191
192 192 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
193 193 // We may want to pass in more arguments - could make this slightly faster
194 194 ConstantPool* constants = method(thread)->constants();
195 195 int i = get_index_u2(thread, Bytecodes::_multianewarray);
196 196 Klass* klass = constants->klass_at(i, CHECK);
197 197 int nof_dims = number_of_dimensions(thread);
198 198 assert(klass->is_klass(), "not a class");
199 199 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
200 200
201 201 // We must create an array of jints to pass to multi_allocate.
202 202 ResourceMark rm(thread);
203 203 const int small_dims = 10;
204 204 jint dim_array[small_dims];
205 205 jint *dims = &dim_array[0];
206 206 if (nof_dims > small_dims) {
207 207 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
208 208 }
209 209 for (int index = 0; index < nof_dims; index++) {
210 210 // offset from first_size_address is addressed as local[index]
211 211 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
212 212 dims[index] = first_size_address[n];
213 213 }
214 214 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
215 215 thread->set_vm_result(obj);
216 216 IRT_END
217 217
218 218
219 219 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
220 220 assert(obj->is_oop(), "must be a valid oop");
221 221 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
222 222 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
223 223 IRT_END
224 224
225 225
226 226 // Quicken instance-of and check-cast bytecodes
227 227 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
228 228 // Force resolving; quicken the bytecode
229 229 int which = get_index_u2(thread, Bytecodes::_checkcast);
230 230 ConstantPool* cpool = method(thread)->constants();
231 231 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
232 232 // program we might have seen an unquick'd bytecode in the interpreter but have another
233 233 // thread quicken the bytecode before we get here.
234 234 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
235 235 Klass* klass = cpool->klass_at(which, CHECK);
236 236 thread->set_vm_result_2(klass);
237 237 IRT_END
238 238
239 239
240 240 //------------------------------------------------------------------------------------------------------------------------
241 241 // Exceptions
242 242
243 243 // Assume the compiler is (or will be) interested in this event.
244 244 // If necessary, create an MDO to hold the information, and record it.
245 245 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
246 246 assert(ProfileTraps, "call me only if profiling");
247 247 methodHandle trap_method(thread, method(thread));
248 248
249 249 if (trap_method.not_null()) {
250 250 MethodData* trap_mdo = trap_method->method_data();
251 251 if (trap_mdo == NULL) {
252 252 Method::build_interpreter_method_data(trap_method, THREAD);
253 253 if (HAS_PENDING_EXCEPTION) {
254 254 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
255 255 CLEAR_PENDING_EXCEPTION;
256 256 }
257 257 trap_mdo = trap_method->method_data();
258 258 // and fall through...
259 259 }
260 260 if (trap_mdo != NULL) {
261 261 // Update per-method count of trap events. The interpreter
262 262 // is updating the MDO to simulate the effect of compiler traps.
263 263 int trap_bci = trap_method->bci_from(bcp(thread));
264 264 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
265 265 }
266 266 }
267 267 }
268 268
269 269 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
270 270 // get klass
271 271 InstanceKlass* klass = InstanceKlass::cast(k);
272 272 assert(klass->is_initialized(),
273 273 "this klass should have been initialized during VM initialization");
274 274 // create instance - do not call constructor since we may have no
275 275 // (java) stack space left (should assert constructor is empty)
276 276 Handle exception;
277 277 oop exception_oop = klass->allocate_instance(CHECK_(exception));
278 278 exception = Handle(THREAD, exception_oop);
279 279 if (StackTraceInThrowable) {
280 280 java_lang_Throwable::fill_in_stack_trace(exception);
281 281 }
282 282 return exception;
283 283 }
284 284
285 285 // Special handling for stack overflow: since we don't have any (java) stack
286 286 // space left we use the pre-allocated & pre-initialized StackOverflowError
287 287 // klass to create an stack overflow error instance. We do not call its
288 288 // constructor for the same reason (it is empty, anyway).
289 289 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
290 290 Handle exception = get_preinitialized_exception(
291 291 SystemDictionary::StackOverflowError_klass(),
292 292 CHECK);
293 293 THROW_HANDLE(exception);
294 294 IRT_END
295 295
296 296
297 297 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
298 298 // lookup exception klass
299 299 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
300 300 if (ProfileTraps) {
301 301 if (s == vmSymbols::java_lang_ArithmeticException()) {
302 302 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
303 303 } else if (s == vmSymbols::java_lang_NullPointerException()) {
304 304 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
305 305 }
306 306 }
307 307 // create exception
308 308 Handle exception = Exceptions::new_exception(thread, s, message);
309 309 thread->set_vm_result(exception());
310 310 IRT_END
311 311
312 312
313 313 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
314 314 ResourceMark rm(thread);
315 315 const char* klass_name = Klass::cast(obj->klass())->external_name();
316 316 // lookup exception klass
317 317 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
318 318 if (ProfileTraps) {
319 319 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
320 320 }
321 321 // create exception, with klass name as detail message
322 322 Handle exception = Exceptions::new_exception(thread, s, klass_name);
323 323 thread->set_vm_result(exception());
324 324 IRT_END
325 325
326 326
327 327 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
328 328 char message[jintAsStringSize];
329 329 // lookup exception klass
330 330 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
331 331 if (ProfileTraps) {
332 332 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
333 333 }
334 334 // create exception
335 335 sprintf(message, "%d", index);
336 336 THROW_MSG(s, message);
337 337 IRT_END
338 338
339 339 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
340 340 JavaThread* thread, oopDesc* obj))
341 341
342 342 ResourceMark rm(thread);
343 343 char* message = SharedRuntime::generate_class_cast_message(
344 344 thread, Klass::cast(obj->klass())->external_name());
345 345
346 346 if (ProfileTraps) {
347 347 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
348 348 }
349 349
350 350 // create exception
351 351 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
352 352 IRT_END
353 353
354 354 // exception_handler_for_exception(...) returns the continuation address,
355 355 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
356 356 // The exception oop is returned to make sure it is preserved over GC (it
357 357 // is only on the stack if the exception was thrown explicitly via athrow).
358 358 // During this operation, the expression stack contains the values for the
359 359 // bci where the exception happened. If the exception was propagated back
360 360 // from a call, the expression stack contains the values for the bci at the
361 361 // invoke w/o arguments (i.e., as if one were inside the call).
362 362 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
363 363
364 364 Handle h_exception(thread, exception);
365 365 methodHandle h_method (thread, method(thread));
366 366 constantPoolHandle h_constants(thread, h_method->constants());
367 367 bool should_repeat;
368 368 int handler_bci;
369 369 int current_bci = bci(thread);
370 370
371 371 // Need to do this check first since when _do_not_unlock_if_synchronized
372 372 // is set, we don't want to trigger any classloading which may make calls
373 373 // into java, or surprisingly find a matching exception handler for bci 0
374 374 // since at this moment the method hasn't been "officially" entered yet.
375 375 if (thread->do_not_unlock_if_synchronized()) {
376 376 ResourceMark rm;
377 377 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
378 378 thread->set_vm_result(exception);
379 379 #ifdef CC_INTERP
380 380 return (address) -1;
381 381 #else
382 382 return Interpreter::remove_activation_entry();
383 383 #endif
384 384 }
385 385
386 386 do {
387 387 should_repeat = false;
388 388
389 389 // assertions
390 390 #ifdef ASSERT
391 391 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
392 392 assert(h_exception->is_oop(), "just checking");
393 393 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
394 394 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
395 395 if (ExitVMOnVerifyError) vm_exit(-1);
396 396 ShouldNotReachHere();
397 397 }
398 398 #endif
399 399
400 400 // tracing
401 401 if (TraceExceptions) {
402 402 ttyLocker ttyl;
403 403 ResourceMark rm(thread);
404 404 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception());
405 405 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
406 406 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
407 407 }
408 408 // Don't go paging in something which won't be used.
409 409 // else if (extable->length() == 0) {
410 410 // // disabled for now - interpreter is not using shortcut yet
411 411 // // (shortcut is not to call runtime if we have no exception handlers)
412 412 // // warning("performance bug: should not call runtime if method has no exception handlers");
413 413 // }
414 414 // for AbortVMOnException flag
415 415 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
416 416
417 417 // exception handler lookup
418 418 KlassHandle h_klass(THREAD, h_exception->klass());
419 419 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD);
420 420 if (HAS_PENDING_EXCEPTION) {
421 421 // We threw an exception while trying to find the exception handler.
422 422 // Transfer the new exception to the exception handle which will
423 423 // be set into thread local storage, and do another lookup for an
424 424 // exception handler for this exception, this time starting at the
425 425 // BCI of the exception handler which caused the exception to be
426 426 // thrown (bug 4307310).
427 427 h_exception = Handle(THREAD, PENDING_EXCEPTION);
428 428 CLEAR_PENDING_EXCEPTION;
429 429 if (handler_bci >= 0) {
430 430 current_bci = handler_bci;
431 431 should_repeat = true;
432 432 }
433 433 }
434 434 } while (should_repeat == true);
435 435
436 436 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
437 437 // time throw or a stack unwinding throw and accordingly notify the debugger
438 438 if (JvmtiExport::can_post_on_exceptions()) {
439 439 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
440 440 }
441 441
442 442 #ifdef CC_INTERP
443 443 address continuation = (address)(intptr_t) handler_bci;
444 444 #else
445 445 address continuation = NULL;
446 446 #endif
447 447 address handler_pc = NULL;
448 448 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
449 449 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
450 450 // handler in this method, or (b) after a stack overflow there is not yet
451 451 // enough stack space available to reprotect the stack.
452 452 #ifndef CC_INTERP
453 453 continuation = Interpreter::remove_activation_entry();
454 454 #endif
455 455 // Count this for compilation purposes
456 456 h_method->interpreter_throwout_increment();
457 457 } else {
458 458 // handler in this method => change bci/bcp to handler bci/bcp and continue there
459 459 handler_pc = h_method->code_base() + handler_bci;
460 460 #ifndef CC_INTERP
461 461 set_bcp_and_mdp(handler_pc, thread);
462 462 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
463 463 #endif
464 464 }
465 465 // notify debugger of an exception catch
466 466 // (this is good for exceptions caught in native methods as well)
467 467 if (JvmtiExport::can_post_on_exceptions()) {
468 468 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
469 469 }
470 470
471 471 thread->set_vm_result(h_exception());
472 472 return continuation;
473 473 IRT_END
474 474
475 475
476 476 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
477 477 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
478 478 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
479 479 IRT_END
480 480
481 481
482 482 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
483 483 THROW(vmSymbols::java_lang_AbstractMethodError());
484 484 IRT_END
485 485
486 486
487 487 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
488 488 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
489 489 IRT_END
490 490
491 491
492 492 //------------------------------------------------------------------------------------------------------------------------
493 493 // Fields
494 494 //
495 495
496 496 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
497 497 // resolve field
498 498 FieldAccessInfo info;
499 499 constantPoolHandle pool(thread, method(thread)->constants());
500 500 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic);
501 501 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
502 502
503 503 {
504 504 JvmtiHideSingleStepping jhss(thread);
505 505 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode),
506 506 bytecode, false, CHECK);
507 507 } // end JvmtiHideSingleStepping
508 508
509 509 // check if link resolution caused cpCache to be updated
510 510 if (already_resolved(thread)) return;
511 511
512 512 // compute auxiliary field attributes
513 513 TosState state = as_TosState(info.field_type());
514 514
515 515 // We need to delay resolving put instructions on final fields
516 516 // until we actually invoke one. This is required so we throw
517 517 // exceptions at the correct place. If we do not resolve completely
518 518 // in the current pass, leaving the put_code set to zero will
519 519 // cause the next put instruction to reresolve.
520 520 Bytecodes::Code put_code = (Bytecodes::Code)0;
521 521
522 522 // We also need to delay resolving getstatic instructions until the
523 523 // class is intitialized. This is required so that access to the static
524 524 // field will call the initialization function every time until the class
525 525 // is completely initialized ala. in 2.17.5 in JVM Specification.
526 526 InstanceKlass *klass = InstanceKlass::cast(info.klass()());
527 527 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
528 528 !klass->is_initialized());
529 529 Bytecodes::Code get_code = (Bytecodes::Code)0;
530 530
531 531 if (!uninitialized_static) {
532 532 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
533 533 if (is_put || !info.access_flags().is_final()) {
534 534 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
535 535 }
536 536 }
537 537
538 538 cache_entry(thread)->set_field(
539 539 get_code,
540 540 put_code,
541 541 info.klass(),
542 542 info.field_index(),
543 543 info.field_offset(),
544 544 state,
545 545 info.access_flags().is_final(),
546 546 info.access_flags().is_volatile(),
547 547 pool->pool_holder()
548 548 );
549 549 IRT_END
550 550
551 551
552 552 //------------------------------------------------------------------------------------------------------------------------
553 553 // Synchronization
554 554 //
555 555 // The interpreter's synchronization code is factored out so that it can
556 556 // be shared by method invocation and synchronized blocks.
557 557 //%note synchronization_3
558 558
559 559 static void trace_locking(Handle& h_locking_obj, bool is_locking) {
560 560 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking);
561 561 }
562 562
563 563
564 564 //%note monitor_1
565 565 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
566 566 #ifdef ASSERT
567 567 thread->last_frame().interpreter_frame_verify_monitor(elem);
568 568 #endif
569 569 if (PrintBiasedLockingStatistics) {
570 570 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
571 571 }
572 572 Handle h_obj(thread, elem->obj());
573 573 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
574 574 "must be NULL or an object");
575 575 if (UseBiasedLocking) {
576 576 // Retry fast entry if bias is revoked to avoid unnecessary inflation
577 577 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
578 578 } else {
579 579 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
580 580 }
581 581 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
582 582 "must be NULL or an object");
583 583 #ifdef ASSERT
584 584 thread->last_frame().interpreter_frame_verify_monitor(elem);
585 585 #endif
586 586 IRT_END
587 587
588 588
589 589 //%note monitor_1
590 590 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
591 591 #ifdef ASSERT
592 592 thread->last_frame().interpreter_frame_verify_monitor(elem);
593 593 #endif
594 594 Handle h_obj(thread, elem->obj());
595 595 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
596 596 "must be NULL or an object");
597 597 if (elem == NULL || h_obj()->is_unlocked()) {
598 598 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
599 599 }
600 600 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
601 601 // Free entry. This must be done here, since a pending exception might be installed on
602 602 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
603 603 elem->set_obj(NULL);
604 604 #ifdef ASSERT
605 605 thread->last_frame().interpreter_frame_verify_monitor(elem);
606 606 #endif
607 607 IRT_END
608 608
609 609
610 610 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
611 611 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
612 612 IRT_END
613 613
614 614
615 615 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
616 616 // Returns an illegal exception to install into the current thread. The
617 617 // pending_exception flag is cleared so normal exception handling does not
618 618 // trigger. Any current installed exception will be overwritten. This
619 619 // method will be called during an exception unwind.
620 620
621 621 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
622 622 Handle exception(thread, thread->vm_result());
623 623 assert(exception() != NULL, "vm result should be set");
624 624 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
625 625 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
626 626 exception = get_preinitialized_exception(
627 627 SystemDictionary::IllegalMonitorStateException_klass(),
628 628 CATCH);
629 629 }
630 630 thread->set_vm_result(exception());
631 631 IRT_END
632 632
633 633
634 634 //------------------------------------------------------------------------------------------------------------------------
635 635 // Invokes
636 636
637 637 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
638 638 return method->orig_bytecode_at(method->bci_from(bcp));
639 639 IRT_END
640 640
641 641 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
642 642 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
643 643 IRT_END
644 644
645 645 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
646 646 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
647 647 IRT_END
648 648
649 649 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) {
650 650 // extract receiver from the outgoing argument list if necessary
651 651 Handle receiver(thread, NULL);
652 652 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
653 653 ResourceMark rm(thread);
654 654 methodHandle m (thread, method(thread));
655 655 Bytecode_invoke call(m, bci(thread));
656 656 Symbol* signature = call.signature();
657 657 receiver = Handle(thread,
658 658 thread->last_frame().interpreter_callee_receiver(signature));
659 659 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
660 660 "sanity check");
661 661 assert(receiver.is_null() ||
662 662 !Universe::heap()->is_in_reserved(receiver->klass()),
663 663 "sanity check");
664 664 }
665 665
666 666 // resolve method
667 667 CallInfo info;
668 668 constantPoolHandle pool(thread, method(thread)->constants());
669 669
670 670 {
671 671 JvmtiHideSingleStepping jhss(thread);
672 672 LinkResolver::resolve_invoke(info, receiver, pool,
673 673 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
674 674 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
675 675 int retry_count = 0;
676 676 while (info.resolved_method()->is_old()) {
677 677 // It is very unlikely that method is redefined more than 100 times
678 678 // in the middle of resolve. If it is looping here more than 100 times
679 679 // means then there could be a bug here.
680 680 guarantee((retry_count++ < 100),
681 681 "Could not resolve to latest version of redefined method");
682 682 // method is redefined in the middle of resolve so re-try.
683 683 LinkResolver::resolve_invoke(info, receiver, pool,
684 684 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
685 685 }
686 686 }
687 687 } // end JvmtiHideSingleStepping
688 688
689 689 // check if link resolution caused cpCache to be updated
690 690 if (already_resolved(thread)) return;
691 691
692 692 if (bytecode == Bytecodes::_invokeinterface) {
693 693
694 694 if (TraceItables && Verbose) {
695 695 ResourceMark rm(thread);
696 696 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
697 697 }
698 698 if (info.resolved_method()->method_holder() ==
699 699 SystemDictionary::Object_klass()) {
700 700 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
701 701 // (see also cpCacheOop.cpp for details)
702 702 methodHandle rm = info.resolved_method();
703 703 assert(rm->is_final() || info.has_vtable_index(),
704 704 "should have been set already");
705 705 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index());
706 706 } else {
707 707 // Setup itable entry
708 708 int index = klassItable::compute_itable_index(info.resolved_method()());
709 709 cache_entry(thread)->set_interface_call(info.resolved_method(), index);
710 710 }
711 711 } else {
712 712 cache_entry(thread)->set_method(
713 713 bytecode,
714 714 info.resolved_method(),
715 715 info.vtable_index());
716 716 }
717 717 }
718 718 IRT_END
719 719
720 720
721 721 // First time execution: Resolve symbols, create a permanent MethodType object.
722 722 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) {
723 723 assert(EnableInvokeDynamic, "");
724 724 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
725 725
726 726 // resolve method
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727 727 CallInfo info;
728 728 constantPoolHandle pool(thread, method(thread)->constants());
729 729
730 730 {
731 731 JvmtiHideSingleStepping jhss(thread);
732 732 LinkResolver::resolve_invoke(info, Handle(), pool,
733 733 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
734 734 } // end JvmtiHideSingleStepping
735 735
736 736 cache_entry(thread)->set_method_handle(
737 + pool,
737 738 info.resolved_method(),
738 739 info.resolved_appendix(),
739 740 pool->resolved_references());
740 741 }
741 742 IRT_END
742 743
743 744
744 745 // First time execution: Resolve symbols, create a permanent CallSite object.
745 746 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) {
746 747 assert(EnableInvokeDynamic, "");
747 748 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
748 749
749 750 //TO DO: consider passing BCI to Java.
750 751 // int caller_bci = method(thread)->bci_from(bcp(thread));
751 752
752 753 // resolve method
753 754 CallInfo info;
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754 755 constantPoolHandle pool(thread, method(thread)->constants());
755 756 int index = get_index_u4(thread, bytecode);
756 757 {
757 758 JvmtiHideSingleStepping jhss(thread);
758 759 LinkResolver::resolve_invoke(info, Handle(), pool,
759 760 index, bytecode, CHECK);
760 761 } // end JvmtiHideSingleStepping
761 762
762 763 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
763 764 cp_cache_entry->set_dynamic_call(
765 + pool,
764 766 info.resolved_method(),
765 767 info.resolved_appendix(),
766 768 pool->resolved_references());
767 769 }
768 770 IRT_END
769 771
770 772
771 773 //------------------------------------------------------------------------------------------------------------------------
772 774 // Miscellaneous
773 775
774 776
775 777 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
776 778 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
777 779 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
778 780 if (branch_bcp != NULL && nm != NULL) {
779 781 // This was a successful request for an OSR nmethod. Because
780 782 // frequency_counter_overflow_inner ends with a safepoint check,
781 783 // nm could have been unloaded so look it up again. It's unsafe
782 784 // to examine nm directly since it might have been freed and used
783 785 // for something else.
784 786 frame fr = thread->last_frame();
785 787 Method* method = fr.interpreter_frame_method();
786 788 int bci = method->bci_from(fr.interpreter_frame_bcp());
787 789 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
788 790 }
789 791 #ifndef PRODUCT
790 792 if (TraceOnStackReplacement) {
791 793 if (nm != NULL) {
792 794 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
793 795 nm->print();
794 796 }
795 797 }
796 798 #endif
797 799 return nm;
798 800 }
799 801
800 802 IRT_ENTRY(nmethod*,
801 803 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
802 804 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
803 805 // flag, in case this method triggers classloading which will call into Java.
804 806 UnlockFlagSaver fs(thread);
805 807
806 808 frame fr = thread->last_frame();
807 809 assert(fr.is_interpreted_frame(), "must come from interpreter");
808 810 methodHandle method(thread, fr.interpreter_frame_method());
809 811 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
810 812 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
811 813
812 814 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
813 815 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
814 816 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
815 817
816 818 if (osr_nm != NULL) {
817 819 // We may need to do on-stack replacement which requires that no
818 820 // monitors in the activation are biased because their
819 821 // BasicObjectLocks will need to migrate during OSR. Force
820 822 // unbiasing of all monitors in the activation now (even though
821 823 // the OSR nmethod might be invalidated) because we don't have a
822 824 // safepoint opportunity later once the migration begins.
823 825 if (UseBiasedLocking) {
824 826 ResourceMark rm;
825 827 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
826 828 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
827 829 kptr < fr.interpreter_frame_monitor_begin();
828 830 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
829 831 if( kptr->obj() != NULL ) {
830 832 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
831 833 }
832 834 }
833 835 BiasedLocking::revoke(objects_to_revoke);
834 836 }
835 837 }
836 838 return osr_nm;
837 839 IRT_END
838 840
839 841 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
840 842 assert(ProfileInterpreter, "must be profiling interpreter");
841 843 int bci = method->bci_from(cur_bcp);
842 844 MethodData* mdo = method->method_data();
843 845 if (mdo == NULL) return 0;
844 846 return mdo->bci_to_di(bci);
845 847 IRT_END
846 848
847 849 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
848 850 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
849 851 // flag, in case this method triggers classloading which will call into Java.
850 852 UnlockFlagSaver fs(thread);
851 853
852 854 assert(ProfileInterpreter, "must be profiling interpreter");
853 855 frame fr = thread->last_frame();
854 856 assert(fr.is_interpreted_frame(), "must come from interpreter");
855 857 methodHandle method(thread, fr.interpreter_frame_method());
856 858 Method::build_interpreter_method_data(method, THREAD);
857 859 if (HAS_PENDING_EXCEPTION) {
858 860 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
859 861 CLEAR_PENDING_EXCEPTION;
860 862 // and fall through...
861 863 }
862 864 IRT_END
863 865
864 866
865 867 #ifdef ASSERT
866 868 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
867 869 assert(ProfileInterpreter, "must be profiling interpreter");
868 870
869 871 MethodData* mdo = method->method_data();
870 872 assert(mdo != NULL, "must not be null");
871 873
872 874 int bci = method->bci_from(bcp);
873 875
874 876 address mdp2 = mdo->bci_to_dp(bci);
875 877 if (mdp != mdp2) {
876 878 ResourceMark rm;
877 879 ResetNoHandleMark rnm; // In a LEAF entry.
878 880 HandleMark hm;
879 881 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
880 882 int current_di = mdo->dp_to_di(mdp);
881 883 int expected_di = mdo->dp_to_di(mdp2);
882 884 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
883 885 int expected_approx_bci = mdo->data_at(expected_di)->bci();
884 886 int approx_bci = -1;
885 887 if (current_di >= 0) {
886 888 approx_bci = mdo->data_at(current_di)->bci();
887 889 }
888 890 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
889 891 mdo->print_on(tty);
890 892 method->print_codes();
891 893 }
892 894 assert(mdp == mdp2, "wrong mdp");
893 895 IRT_END
894 896 #endif // ASSERT
895 897
896 898 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
897 899 assert(ProfileInterpreter, "must be profiling interpreter");
898 900 ResourceMark rm(thread);
899 901 HandleMark hm(thread);
900 902 frame fr = thread->last_frame();
901 903 assert(fr.is_interpreted_frame(), "must come from interpreter");
902 904 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
903 905
904 906 // Grab a lock to ensure atomic access to setting the return bci and
905 907 // the displacement. This can block and GC, invalidating all naked oops.
906 908 MutexLocker ml(RetData_lock);
907 909
908 910 // ProfileData is essentially a wrapper around a derived oop, so we
909 911 // need to take the lock before making any ProfileData structures.
910 912 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
911 913 RetData* rdata = data->as_RetData();
912 914 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
913 915 fr.interpreter_frame_set_mdp(new_mdp);
914 916 IRT_END
915 917
916 918
917 919 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
918 920 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
919 921 // stack traversal automatically takes care of preserving arguments for invoke, so
920 922 // this is no longer needed.
921 923
922 924 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
923 925 // if this is called during a safepoint
924 926
925 927 if (JvmtiExport::should_post_single_step()) {
926 928 // We are called during regular safepoints and when the VM is
927 929 // single stepping. If any thread is marked for single stepping,
928 930 // then we may have JVMTI work to do.
929 931 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
930 932 }
931 933 IRT_END
932 934
933 935 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
934 936 ConstantPoolCacheEntry *cp_entry))
935 937
936 938 // check the access_flags for the field in the klass
937 939
938 940 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
939 941 int index = cp_entry->field_index();
940 942 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
941 943
942 944 switch(cp_entry->flag_state()) {
943 945 case btos: // fall through
944 946 case ctos: // fall through
945 947 case stos: // fall through
946 948 case itos: // fall through
947 949 case ftos: // fall through
948 950 case ltos: // fall through
949 951 case dtos: // fall through
950 952 case atos: break;
951 953 default: ShouldNotReachHere(); return;
952 954 }
953 955 bool is_static = (obj == NULL);
954 956 HandleMark hm(thread);
955 957
956 958 Handle h_obj;
957 959 if (!is_static) {
958 960 // non-static field accessors have an object, but we need a handle
959 961 h_obj = Handle(thread, obj);
960 962 }
961 963 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
962 964 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
963 965 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
964 966 IRT_END
965 967
966 968 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
967 969 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
968 970
969 971 Klass* k = (Klass*)cp_entry->f1_as_klass();
970 972
971 973 // check the access_flags for the field in the klass
972 974 InstanceKlass* ik = InstanceKlass::cast(k);
973 975 int index = cp_entry->field_index();
974 976 // bail out if field modifications are not watched
975 977 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
976 978
977 979 char sig_type = '\0';
978 980
979 981 switch(cp_entry->flag_state()) {
980 982 case btos: sig_type = 'Z'; break;
981 983 case ctos: sig_type = 'C'; break;
982 984 case stos: sig_type = 'S'; break;
983 985 case itos: sig_type = 'I'; break;
984 986 case ftos: sig_type = 'F'; break;
985 987 case atos: sig_type = 'L'; break;
986 988 case ltos: sig_type = 'J'; break;
987 989 case dtos: sig_type = 'D'; break;
988 990 default: ShouldNotReachHere(); return;
989 991 }
990 992 bool is_static = (obj == NULL);
991 993
992 994 HandleMark hm(thread);
993 995 instanceKlassHandle h_klass(thread, k);
994 996 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
995 997 jvalue fvalue;
996 998 #ifdef _LP64
997 999 fvalue = *value;
998 1000 #else
999 1001 // Long/double values are stored unaligned and also noncontiguously with
1000 1002 // tagged stacks. We can't just do a simple assignment even in the non-
1001 1003 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1002 1004 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1003 1005 // We assume that the two halves of longs/doubles are stored in interpreter
1004 1006 // stack slots in platform-endian order.
1005 1007 jlong_accessor u;
1006 1008 jint* newval = (jint*)value;
1007 1009 u.words[0] = newval[0];
1008 1010 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1009 1011 fvalue.j = u.long_value;
1010 1012 #endif // _LP64
1011 1013
1012 1014 Handle h_obj;
1013 1015 if (!is_static) {
1014 1016 // non-static field accessors have an object, but we need a handle
1015 1017 h_obj = Handle(thread, obj);
1016 1018 }
1017 1019
1018 1020 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1019 1021 fid, sig_type, &fvalue);
1020 1022 IRT_END
1021 1023
1022 1024 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1023 1025 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1024 1026 IRT_END
1025 1027
1026 1028
1027 1029 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1028 1030 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1029 1031 IRT_END
1030 1032
1031 1033 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1032 1034 {
1033 1035 return (Interpreter::contains(pc) ? 1 : 0);
1034 1036 }
1035 1037 IRT_END
1036 1038
1037 1039
1038 1040 // Implementation of SignatureHandlerLibrary
1039 1041
1040 1042 address SignatureHandlerLibrary::set_handler_blob() {
1041 1043 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1042 1044 if (handler_blob == NULL) {
1043 1045 return NULL;
1044 1046 }
1045 1047 address handler = handler_blob->code_begin();
1046 1048 _handler_blob = handler_blob;
1047 1049 _handler = handler;
1048 1050 return handler;
1049 1051 }
1050 1052
1051 1053 void SignatureHandlerLibrary::initialize() {
1052 1054 if (_fingerprints != NULL) {
1053 1055 return;
1054 1056 }
1055 1057 if (set_handler_blob() == NULL) {
1056 1058 vm_exit_out_of_memory(blob_size, "native signature handlers");
1057 1059 }
1058 1060
1059 1061 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1060 1062 SignatureHandlerLibrary::buffer_size);
1061 1063 _buffer = bb->code_begin();
1062 1064
1063 1065 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1064 1066 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1065 1067 }
1066 1068
1067 1069 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1068 1070 address handler = _handler;
1069 1071 int insts_size = buffer->pure_insts_size();
1070 1072 if (handler + insts_size > _handler_blob->code_end()) {
1071 1073 // get a new handler blob
1072 1074 handler = set_handler_blob();
1073 1075 }
1074 1076 if (handler != NULL) {
1075 1077 memcpy(handler, buffer->insts_begin(), insts_size);
1076 1078 pd_set_handler(handler);
1077 1079 ICache::invalidate_range(handler, insts_size);
1078 1080 _handler = handler + insts_size;
1079 1081 }
1080 1082 return handler;
1081 1083 }
1082 1084
1083 1085 void SignatureHandlerLibrary::add(methodHandle method) {
1084 1086 if (method->signature_handler() == NULL) {
1085 1087 // use slow signature handler if we can't do better
1086 1088 int handler_index = -1;
1087 1089 // check if we can use customized (fast) signature handler
1088 1090 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1089 1091 // use customized signature handler
1090 1092 MutexLocker mu(SignatureHandlerLibrary_lock);
1091 1093 // make sure data structure is initialized
1092 1094 initialize();
1093 1095 // lookup method signature's fingerprint
1094 1096 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1095 1097 handler_index = _fingerprints->find(fingerprint);
1096 1098 // create handler if necessary
1097 1099 if (handler_index < 0) {
1098 1100 ResourceMark rm;
1099 1101 ptrdiff_t align_offset = (address)
1100 1102 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1101 1103 CodeBuffer buffer((address)(_buffer + align_offset),
1102 1104 SignatureHandlerLibrary::buffer_size - align_offset);
1103 1105 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1104 1106 // copy into code heap
1105 1107 address handler = set_handler(&buffer);
1106 1108 if (handler == NULL) {
1107 1109 // use slow signature handler
1108 1110 } else {
1109 1111 // debugging suppport
1110 1112 if (PrintSignatureHandlers) {
1111 1113 tty->cr();
1112 1114 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1113 1115 _handlers->length(),
1114 1116 (method->is_static() ? "static" : "receiver"),
1115 1117 method->name_and_sig_as_C_string(),
1116 1118 fingerprint,
1117 1119 buffer.insts_size());
1118 1120 Disassembler::decode(handler, handler + buffer.insts_size());
1119 1121 #ifndef PRODUCT
1120 1122 tty->print_cr(" --- associated result handler ---");
1121 1123 address rh_begin = Interpreter::result_handler(method()->result_type());
1122 1124 address rh_end = rh_begin;
1123 1125 while (*(int*)rh_end != 0) {
1124 1126 rh_end += sizeof(int);
1125 1127 }
1126 1128 Disassembler::decode(rh_begin, rh_end);
1127 1129 #endif
1128 1130 }
1129 1131 // add handler to library
1130 1132 _fingerprints->append(fingerprint);
1131 1133 _handlers->append(handler);
1132 1134 // set handler index
1133 1135 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1134 1136 handler_index = _fingerprints->length() - 1;
1135 1137 }
1136 1138 }
1137 1139 // Set handler under SignatureHandlerLibrary_lock
1138 1140 if (handler_index < 0) {
1139 1141 // use generic signature handler
1140 1142 method->set_signature_handler(Interpreter::slow_signature_handler());
1141 1143 } else {
1142 1144 // set handler
1143 1145 method->set_signature_handler(_handlers->at(handler_index));
1144 1146 }
1145 1147 } else {
1146 1148 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1147 1149 // use generic signature handler
1148 1150 method->set_signature_handler(Interpreter::slow_signature_handler());
1149 1151 }
1150 1152 }
1151 1153 #ifdef ASSERT
1152 1154 int handler_index = -1;
1153 1155 int fingerprint_index = -2;
1154 1156 {
1155 1157 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1156 1158 // in any way if accessed from multiple threads. To avoid races with another
1157 1159 // thread which may change the arrays in the above, mutex protected block, we
1158 1160 // have to protect this read access here with the same mutex as well!
1159 1161 MutexLocker mu(SignatureHandlerLibrary_lock);
1160 1162 if (_handlers != NULL) {
1161 1163 handler_index = _handlers->find(method->signature_handler());
1162 1164 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
1163 1165 }
1164 1166 }
1165 1167 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1166 1168 handler_index == fingerprint_index, "sanity check");
1167 1169 #endif // ASSERT
1168 1170 }
1169 1171
1170 1172
1171 1173 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1172 1174 address SignatureHandlerLibrary::_handler = NULL;
1173 1175 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1174 1176 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1175 1177 address SignatureHandlerLibrary::_buffer = NULL;
1176 1178
1177 1179
1178 1180 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1179 1181 methodHandle m(thread, method);
1180 1182 assert(m->is_native(), "sanity check");
1181 1183 // lookup native function entry point if it doesn't exist
1182 1184 bool in_base_library;
1183 1185 if (!m->has_native_function()) {
1184 1186 NativeLookup::lookup(m, in_base_library, CHECK);
1185 1187 }
1186 1188 // make sure signature handler is installed
1187 1189 SignatureHandlerLibrary::add(m);
1188 1190 // The interpreter entry point checks the signature handler first,
1189 1191 // before trying to fetch the native entry point and klass mirror.
1190 1192 // We must set the signature handler last, so that multiple processors
1191 1193 // preparing the same method will be sure to see non-null entry & mirror.
1192 1194 IRT_END
1193 1195
1194 1196 #if defined(IA32) || defined(AMD64) || defined(ARM)
1195 1197 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1196 1198 if (src_address == dest_address) {
1197 1199 return;
1198 1200 }
1199 1201 ResetNoHandleMark rnm; // In a LEAF entry.
1200 1202 HandleMark hm;
1201 1203 ResourceMark rm;
1202 1204 frame fr = thread->last_frame();
1203 1205 assert(fr.is_interpreted_frame(), "");
1204 1206 jint bci = fr.interpreter_frame_bci();
1205 1207 methodHandle mh(thread, fr.interpreter_frame_method());
1206 1208 Bytecode_invoke invoke(mh, bci);
1207 1209 ArgumentSizeComputer asc(invoke.signature());
1208 1210 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1209 1211 Copy::conjoint_jbytes(src_address, dest_address,
1210 1212 size_of_arguments * Interpreter::stackElementSize);
1211 1213 IRT_END
1212 1214 #endif
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