Mercurial > hg > truffle
annotate src/share/vm/runtime/vframeArray.cpp @ 2645:b2c1e959be46
Clean up around BlockBegin / StdEntry.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 11 May 2011 14:34:29 +0200 |
parents | 008adfd6d850 |
children | 5ca1332171c8 |
rev | line source |
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0 | 1 /* |
2142 | 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/vmSymbols.hpp" | |
27 #include "interpreter/interpreter.hpp" | |
28 #include "memory/allocation.inline.hpp" | |
29 #include "memory/resourceArea.hpp" | |
30 #include "memory/universe.inline.hpp" | |
31 #include "oops/methodDataOop.hpp" | |
32 #include "oops/oop.inline.hpp" | |
33 #include "prims/jvmtiThreadState.hpp" | |
34 #include "runtime/handles.inline.hpp" | |
35 #include "runtime/monitorChunk.hpp" | |
36 #include "runtime/sharedRuntime.hpp" | |
37 #include "runtime/vframe.hpp" | |
38 #include "runtime/vframeArray.hpp" | |
39 #include "runtime/vframe_hp.hpp" | |
40 #include "utilities/events.hpp" | |
41 #ifdef COMPILER2 | |
42 #include "opto/runtime.hpp" | |
43 #endif | |
0 | 44 |
45 | |
46 int vframeArrayElement:: bci(void) const { return (_bci == SynchronizationEntryBCI ? 0 : _bci); } | |
47 | |
48 void vframeArrayElement::free_monitors(JavaThread* jt) { | |
49 if (_monitors != NULL) { | |
50 MonitorChunk* chunk = _monitors; | |
51 _monitors = NULL; | |
52 jt->remove_monitor_chunk(chunk); | |
53 delete chunk; | |
54 } | |
55 } | |
56 | |
57 void vframeArrayElement::fill_in(compiledVFrame* vf) { | |
58 | |
59 // Copy the information from the compiled vframe to the | |
60 // interpreter frame we will be creating to replace vf | |
61 | |
62 _method = vf->method(); | |
63 _bci = vf->raw_bci(); | |
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64 _reexecute = vf->should_reexecute(); |
0 | 65 |
66 int index; | |
67 | |
68 // Get the monitors off-stack | |
69 | |
70 GrowableArray<MonitorInfo*>* list = vf->monitors(); | |
71 if (list->is_empty()) { | |
72 _monitors = NULL; | |
73 } else { | |
74 | |
75 // Allocate monitor chunk | |
76 _monitors = new MonitorChunk(list->length()); | |
77 vf->thread()->add_monitor_chunk(_monitors); | |
78 | |
79 // Migrate the BasicLocks from the stack to the monitor chunk | |
80 for (index = 0; index < list->length(); index++) { | |
81 MonitorInfo* monitor = list->at(index); | |
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82 assert(!monitor->owner_is_scalar_replaced(), "object should be reallocated already"); |
0 | 83 assert(monitor->owner() == NULL || (!monitor->owner()->is_unlocked() && !monitor->owner()->has_bias_pattern()), "object must be null or locked, and unbiased"); |
84 BasicObjectLock* dest = _monitors->at(index); | |
85 dest->set_obj(monitor->owner()); | |
86 monitor->lock()->move_to(monitor->owner(), dest->lock()); | |
87 } | |
88 } | |
89 | |
90 // Convert the vframe locals and expressions to off stack | |
91 // values. Because we will not gc all oops can be converted to | |
92 // intptr_t (i.e. a stack slot) and we are fine. This is | |
93 // good since we are inside a HandleMark and the oops in our | |
94 // collection would go away between packing them here and | |
95 // unpacking them in unpack_on_stack. | |
96 | |
97 // First the locals go off-stack | |
98 | |
99 // FIXME this seems silly it creates a StackValueCollection | |
100 // in order to get the size to then copy them and | |
101 // convert the types to intptr_t size slots. Seems like it | |
102 // could do it in place... Still uses less memory than the | |
103 // old way though | |
104 | |
105 StackValueCollection *locs = vf->locals(); | |
106 _locals = new StackValueCollection(locs->size()); | |
107 for(index = 0; index < locs->size(); index++) { | |
108 StackValue* value = locs->at(index); | |
109 switch(value->type()) { | |
110 case T_OBJECT: | |
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111 assert(!value->obj_is_scalar_replaced(), "object should be reallocated already"); |
0 | 112 // preserve object type |
113 _locals->add( new StackValue((intptr_t) (value->get_obj()()), T_OBJECT )); | |
114 break; | |
115 case T_CONFLICT: | |
116 // A dead local. Will be initialized to null/zero. | |
117 _locals->add( new StackValue()); | |
118 break; | |
119 case T_INT: | |
120 _locals->add( new StackValue(value->get_int())); | |
121 break; | |
122 default: | |
123 ShouldNotReachHere(); | |
124 } | |
125 } | |
126 | |
127 // Now the expressions off-stack | |
128 // Same silliness as above | |
129 | |
130 StackValueCollection *exprs = vf->expressions(); | |
131 _expressions = new StackValueCollection(exprs->size()); | |
132 for(index = 0; index < exprs->size(); index++) { | |
133 StackValue* value = exprs->at(index); | |
134 switch(value->type()) { | |
135 case T_OBJECT: | |
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136 assert(!value->obj_is_scalar_replaced(), "object should be reallocated already"); |
0 | 137 // preserve object type |
138 _expressions->add( new StackValue((intptr_t) (value->get_obj()()), T_OBJECT )); | |
139 break; | |
140 case T_CONFLICT: | |
141 // A dead stack element. Will be initialized to null/zero. | |
142 // This can occur when the compiler emits a state in which stack | |
143 // elements are known to be dead (because of an imminent exception). | |
144 _expressions->add( new StackValue()); | |
145 break; | |
146 case T_INT: | |
147 _expressions->add( new StackValue(value->get_int())); | |
148 break; | |
149 default: | |
150 ShouldNotReachHere(); | |
151 } | |
152 } | |
153 } | |
154 | |
155 int unpack_counter = 0; | |
156 | |
157 void vframeArrayElement::unpack_on_stack(int callee_parameters, | |
158 int callee_locals, | |
159 frame* caller, | |
160 bool is_top_frame, | |
161 int exec_mode) { | |
162 JavaThread* thread = (JavaThread*) Thread::current(); | |
163 | |
164 // Look at bci and decide on bcp and continuation pc | |
165 address bcp; | |
166 // C++ interpreter doesn't need a pc since it will figure out what to do when it | |
167 // begins execution | |
168 address pc; | |
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169 bool use_next_mdp = false; // true if we should use the mdp associated with the next bci |
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170 // rather than the one associated with bcp |
0 | 171 if (raw_bci() == SynchronizationEntryBCI) { |
172 // We are deoptimizing while hanging in prologue code for synchronized method | |
173 bcp = method()->bcp_from(0); // first byte code | |
174 pc = Interpreter::deopt_entry(vtos, 0); // step = 0 since we don't skip current bytecode | |
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175 } else if (should_reexecute()) { //reexecute this bytecode |
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176 assert(is_top_frame, "reexecute allowed only for the top frame"); |
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177 bcp = method()->bcp_from(bci()); |
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178 pc = Interpreter::deopt_reexecute_entry(method(), bcp); |
0 | 179 } else { |
180 bcp = method()->bcp_from(bci()); | |
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181 pc = Interpreter::deopt_continue_after_entry(method(), bcp, callee_parameters, is_top_frame); |
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182 use_next_mdp = true; |
0 | 183 } |
184 assert(Bytecodes::is_defined(*bcp), "must be a valid bytecode"); | |
185 | |
186 // Monitorenter and pending exceptions: | |
187 // | |
188 // For Compiler2, there should be no pending exception when deoptimizing at monitorenter | |
189 // because there is no safepoint at the null pointer check (it is either handled explicitly | |
190 // or prior to the monitorenter) and asynchronous exceptions are not made "pending" by the | |
191 // runtime interface for the slow case (see JRT_ENTRY_FOR_MONITORENTER). If an asynchronous | |
192 // exception was processed, the bytecode pointer would have to be extended one bytecode beyond | |
193 // the monitorenter to place it in the proper exception range. | |
194 // | |
195 // For Compiler1, deoptimization can occur while throwing a NullPointerException at monitorenter, | |
196 // in which case bcp should point to the monitorenter since it is within the exception's range. | |
197 | |
198 assert(*bcp != Bytecodes::_monitorenter || is_top_frame, "a _monitorenter must be a top frame"); | |
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199 assert(thread->deopt_nmethod() != NULL, "nmethod should be known"); |
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200 guarantee(!(thread->deopt_nmethod()->is_compiled_by_c2() && |
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201 *bcp == Bytecodes::_monitorenter && |
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202 exec_mode == Deoptimization::Unpack_exception), |
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203 "shouldn't get exception during monitorenter"); |
0 | 204 |
205 int popframe_preserved_args_size_in_bytes = 0; | |
206 int popframe_preserved_args_size_in_words = 0; | |
207 if (is_top_frame) { | |
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208 JvmtiThreadState *state = thread->jvmti_thread_state(); |
0 | 209 if (JvmtiExport::can_pop_frame() && |
210 (thread->has_pending_popframe() || thread->popframe_forcing_deopt_reexecution())) { | |
211 if (thread->has_pending_popframe()) { | |
212 // Pop top frame after deoptimization | |
213 #ifndef CC_INTERP | |
214 pc = Interpreter::remove_activation_preserving_args_entry(); | |
215 #else | |
216 // Do an uncommon trap type entry. c++ interpreter will know | |
217 // to pop frame and preserve the args | |
218 pc = Interpreter::deopt_entry(vtos, 0); | |
219 use_next_mdp = false; | |
220 #endif | |
221 } else { | |
222 // Reexecute invoke in top frame | |
223 pc = Interpreter::deopt_entry(vtos, 0); | |
224 use_next_mdp = false; | |
225 popframe_preserved_args_size_in_bytes = in_bytes(thread->popframe_preserved_args_size()); | |
226 // Note: the PopFrame-related extension of the expression stack size is done in | |
227 // Deoptimization::fetch_unroll_info_helper | |
228 popframe_preserved_args_size_in_words = in_words(thread->popframe_preserved_args_size_in_words()); | |
229 } | |
230 } else if (JvmtiExport::can_force_early_return() && state != NULL && state->is_earlyret_pending()) { | |
231 // Force early return from top frame after deoptimization | |
232 #ifndef CC_INTERP | |
233 pc = Interpreter::remove_activation_early_entry(state->earlyret_tos()); | |
234 #else | |
235 // TBD: Need to implement ForceEarlyReturn for CC_INTERP (ia64) | |
236 #endif | |
237 } else { | |
238 // Possibly override the previous pc computation of the top (youngest) frame | |
239 switch (exec_mode) { | |
240 case Deoptimization::Unpack_deopt: | |
241 // use what we've got | |
242 break; | |
243 case Deoptimization::Unpack_exception: | |
244 // exception is pending | |
1295 | 245 pc = SharedRuntime::raw_exception_handler_for_return_address(thread, pc); |
0 | 246 // [phh] We're going to end up in some handler or other, so it doesn't |
247 // matter what mdp we point to. See exception_handler_for_exception() | |
248 // in interpreterRuntime.cpp. | |
249 break; | |
250 case Deoptimization::Unpack_uncommon_trap: | |
251 case Deoptimization::Unpack_reexecute: | |
252 // redo last byte code | |
253 pc = Interpreter::deopt_entry(vtos, 0); | |
254 use_next_mdp = false; | |
255 break; | |
256 default: | |
257 ShouldNotReachHere(); | |
258 } | |
259 } | |
260 } | |
261 | |
262 // Setup the interpreter frame | |
263 | |
264 assert(method() != NULL, "method must exist"); | |
265 int temps = expressions()->size(); | |
266 | |
267 int locks = monitors() == NULL ? 0 : monitors()->number_of_monitors(); | |
268 | |
269 Interpreter::layout_activation(method(), | |
270 temps + callee_parameters, | |
271 popframe_preserved_args_size_in_words, | |
272 locks, | |
273 callee_parameters, | |
274 callee_locals, | |
275 caller, | |
276 iframe(), | |
277 is_top_frame); | |
278 | |
279 // Update the pc in the frame object and overwrite the temporary pc | |
280 // we placed in the skeletal frame now that we finally know the | |
281 // exact interpreter address we should use. | |
282 | |
283 _frame.patch_pc(thread, pc); | |
284 | |
285 assert (!method()->is_synchronized() || locks > 0, "synchronized methods must have monitors"); | |
286 | |
287 BasicObjectLock* top = iframe()->interpreter_frame_monitor_begin(); | |
288 for (int index = 0; index < locks; index++) { | |
289 top = iframe()->previous_monitor_in_interpreter_frame(top); | |
290 BasicObjectLock* src = _monitors->at(index); | |
291 top->set_obj(src->obj()); | |
292 src->lock()->move_to(src->obj(), top->lock()); | |
293 } | |
294 if (ProfileInterpreter) { | |
295 iframe()->interpreter_frame_set_mdx(0); // clear out the mdp. | |
296 } | |
297 iframe()->interpreter_frame_set_bcx((intptr_t)bcp); // cannot use bcp because frame is not initialized yet | |
298 if (ProfileInterpreter) { | |
299 methodDataOop mdo = method()->method_data(); | |
300 if (mdo != NULL) { | |
301 int bci = iframe()->interpreter_frame_bci(); | |
302 if (use_next_mdp) ++bci; | |
303 address mdp = mdo->bci_to_dp(bci); | |
304 iframe()->interpreter_frame_set_mdp(mdp); | |
305 } | |
306 } | |
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307 |
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308 if (TraceDeoptimization) { |
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309 tty->print_cr("Expressions size: %d", expressions()->size()); |
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310 } |
0 | 311 |
312 // Unpack expression stack | |
313 // If this is an intermediate frame (i.e. not top frame) then this | |
314 // only unpacks the part of the expression stack not used by callee | |
315 // as parameters. The callee parameters are unpacked as part of the | |
316 // callee locals. | |
317 int i; | |
318 for(i = 0; i < expressions()->size(); i++) { | |
319 StackValue *value = expressions()->at(i); | |
320 intptr_t* addr = iframe()->interpreter_frame_expression_stack_at(i); | |
321 switch(value->type()) { | |
322 case T_INT: | |
323 *addr = value->get_int(); | |
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324 #ifndef PRODUCT |
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325 if (TraceDeoptimization) { |
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326 tty->print_cr("Reconstructed expression %d (INT): %d", i, (int)(*addr)); |
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327 } |
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328 #endif |
0 | 329 break; |
330 case T_OBJECT: | |
331 *addr = value->get_int(T_OBJECT); | |
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332 #ifndef PRODUCT |
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333 if (TraceDeoptimization) { |
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334 tty->print("Reconstructed expression %d (OBJECT): ", i); |
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335 oop o = (oop)(*addr); |
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336 if (o == NULL) { |
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337 tty->print_cr("NULL"); |
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338 } else { |
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339 tty->print_cr(err_msg("%s", o->blueprint()->name()->as_C_string())); |
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340 } |
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341 } |
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342 #endif |
0 | 343 break; |
344 case T_CONFLICT: | |
345 // A dead stack slot. Initialize to null in case it is an oop. | |
346 *addr = NULL_WORD; | |
347 break; | |
348 default: | |
349 ShouldNotReachHere(); | |
350 } | |
351 } | |
352 | |
353 | |
354 // Unpack the locals | |
355 for(i = 0; i < locals()->size(); i++) { | |
356 StackValue *value = locals()->at(i); | |
357 intptr_t* addr = iframe()->interpreter_frame_local_at(i); | |
358 switch(value->type()) { | |
359 case T_INT: | |
360 *addr = value->get_int(); | |
1936
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361 #ifndef PRODUCT |
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362 if (TraceDeoptimization) { |
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363 tty->print_cr("Reconstructed local %d (INT): %d", i, (int)(*addr)); |
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364 } |
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365 #endif |
0 | 366 break; |
367 case T_OBJECT: | |
368 *addr = value->get_int(T_OBJECT); | |
1936
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369 #ifndef PRODUCT |
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370 if (TraceDeoptimization) { |
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371 tty->print("Reconstructed local %d (OBJECT): ", i); |
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372 oop o = (oop)(*addr); |
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373 if (o == NULL) { |
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374 tty->print_cr("NULL"); |
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375 } else { |
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376 tty->print_cr(err_msg("%s", o->blueprint()->name()->as_C_string())); |
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377 } |
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parents:
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378 } |
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379 #endif |
0 | 380 break; |
381 case T_CONFLICT: | |
382 // A dead location. If it is an oop then we need a NULL to prevent GC from following it | |
383 *addr = NULL_WORD; | |
384 break; | |
385 default: | |
386 ShouldNotReachHere(); | |
387 } | |
388 } | |
389 | |
390 if (is_top_frame && JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
391 // An interpreted frame was popped but it returns to a deoptimized | |
392 // frame. The incoming arguments to the interpreted activation | |
393 // were preserved in thread-local storage by the | |
394 // remove_activation_preserving_args_entry in the interpreter; now | |
395 // we put them back into the just-unpacked interpreter frame. | |
396 // Note that this assumes that the locals arena grows toward lower | |
397 // addresses. | |
398 if (popframe_preserved_args_size_in_words != 0) { | |
399 void* saved_args = thread->popframe_preserved_args(); | |
400 assert(saved_args != NULL, "must have been saved by interpreter"); | |
401 #ifdef ASSERT | |
402 assert(popframe_preserved_args_size_in_words <= | |
1506 | 403 iframe()->interpreter_frame_expression_stack_size()*Interpreter::stackElementWords, |
0 | 404 "expression stack size should have been extended"); |
405 #endif // ASSERT | |
406 int top_element = iframe()->interpreter_frame_expression_stack_size()-1; | |
407 intptr_t* base; | |
408 if (frame::interpreter_frame_expression_stack_direction() < 0) { | |
409 base = iframe()->interpreter_frame_expression_stack_at(top_element); | |
410 } else { | |
411 base = iframe()->interpreter_frame_expression_stack(); | |
412 } | |
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413 Copy::conjoint_jbytes(saved_args, |
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414 base, |
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415 popframe_preserved_args_size_in_bytes); |
0 | 416 thread->popframe_free_preserved_args(); |
417 } | |
418 } | |
419 | |
420 #ifndef PRODUCT | |
421 if (TraceDeoptimization && Verbose) { | |
422 ttyLocker ttyl; | |
423 tty->print_cr("[%d Interpreted Frame]", ++unpack_counter); | |
424 iframe()->print_on(tty); | |
425 RegisterMap map(thread); | |
426 vframe* f = vframe::new_vframe(iframe(), &map, thread); | |
427 f->print(); | |
428 | |
429 tty->print_cr("locals size %d", locals()->size()); | |
430 tty->print_cr("expression size %d", expressions()->size()); | |
431 | |
432 method()->print_value(); | |
433 tty->cr(); | |
434 // method()->print_codes(); | |
435 } else if (TraceDeoptimization) { | |
436 tty->print(" "); | |
437 method()->print_value(); | |
2142 | 438 Bytecodes::Code code = Bytecodes::java_code_at(method(), bcp); |
0 | 439 int bci = method()->bci_from(bcp); |
440 tty->print(" - %s", Bytecodes::name(code)); | |
441 tty->print(" @ bci %d ", bci); | |
442 tty->print_cr("sp = " PTR_FORMAT, iframe()->sp()); | |
443 } | |
444 #endif // PRODUCT | |
445 | |
446 // The expression stack and locals are in the resource area don't leave | |
447 // a dangling pointer in the vframeArray we leave around for debug | |
448 // purposes | |
449 | |
450 _locals = _expressions = NULL; | |
451 | |
452 } | |
453 | |
454 int vframeArrayElement::on_stack_size(int callee_parameters, | |
455 int callee_locals, | |
456 bool is_top_frame, | |
457 int popframe_extra_stack_expression_els) const { | |
458 assert(method()->max_locals() == locals()->size(), "just checking"); | |
459 int locks = monitors() == NULL ? 0 : monitors()->number_of_monitors(); | |
460 int temps = expressions()->size(); | |
461 return Interpreter::size_activation(method(), | |
462 temps + callee_parameters, | |
463 popframe_extra_stack_expression_els, | |
464 locks, | |
465 callee_parameters, | |
466 callee_locals, | |
467 is_top_frame); | |
468 } | |
469 | |
470 | |
471 | |
472 vframeArray* vframeArray::allocate(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, | |
473 RegisterMap *reg_map, frame sender, frame caller, frame self) { | |
474 | |
475 // Allocate the vframeArray | |
476 vframeArray * result = (vframeArray*) AllocateHeap(sizeof(vframeArray) + // fixed part | |
477 sizeof(vframeArrayElement) * (chunk->length() - 1), // variable part | |
478 "vframeArray::allocate"); | |
479 result->_frames = chunk->length(); | |
480 result->_owner_thread = thread; | |
481 result->_sender = sender; | |
482 result->_caller = caller; | |
483 result->_original = self; | |
484 result->set_unroll_block(NULL); // initialize it | |
485 result->fill_in(thread, frame_size, chunk, reg_map); | |
486 return result; | |
487 } | |
488 | |
489 void vframeArray::fill_in(JavaThread* thread, | |
490 int frame_size, | |
491 GrowableArray<compiledVFrame*>* chunk, | |
492 const RegisterMap *reg_map) { | |
493 // Set owner first, it is used when adding monitor chunks | |
494 | |
495 _frame_size = frame_size; | |
496 for(int i = 0; i < chunk->length(); i++) { | |
497 element(i)->fill_in(chunk->at(i)); | |
498 } | |
499 | |
500 // Copy registers for callee-saved registers | |
501 if (reg_map != NULL) { | |
502 for(int i = 0; i < RegisterMap::reg_count; i++) { | |
503 #ifdef AMD64 | |
504 // The register map has one entry for every int (32-bit value), so | |
505 // 64-bit physical registers have two entries in the map, one for | |
506 // each half. Ignore the high halves of 64-bit registers, just like | |
507 // frame::oopmapreg_to_location does. | |
508 // | |
509 // [phh] FIXME: this is a temporary hack! This code *should* work | |
510 // correctly w/o this hack, possibly by changing RegisterMap::pd_location | |
511 // in frame_amd64.cpp and the values of the phantom high half registers | |
512 // in amd64.ad. | |
513 // if (VMReg::Name(i) < SharedInfo::stack0 && is_even(i)) { | |
514 intptr_t* src = (intptr_t*) reg_map->location(VMRegImpl::as_VMReg(i)); | |
515 _callee_registers[i] = src != NULL ? *src : NULL_WORD; | |
516 // } else { | |
517 // jint* src = (jint*) reg_map->location(VMReg::Name(i)); | |
518 // _callee_registers[i] = src != NULL ? *src : NULL_WORD; | |
519 // } | |
520 #else | |
521 jint* src = (jint*) reg_map->location(VMRegImpl::as_VMReg(i)); | |
522 _callee_registers[i] = src != NULL ? *src : NULL_WORD; | |
523 #endif | |
524 if (src == NULL) { | |
525 set_location_valid(i, false); | |
526 } else { | |
527 set_location_valid(i, true); | |
528 jint* dst = (jint*) register_location(i); | |
529 *dst = *src; | |
530 } | |
531 } | |
532 } | |
533 } | |
534 | |
535 void vframeArray::unpack_to_stack(frame &unpack_frame, int exec_mode) { | |
536 // stack picture | |
537 // unpack_frame | |
538 // [new interpreter frames ] (frames are skeletal but walkable) | |
539 // caller_frame | |
540 // | |
541 // This routine fills in the missing data for the skeletal interpreter frames | |
542 // in the above picture. | |
543 | |
544 // Find the skeletal interpreter frames to unpack into | |
545 RegisterMap map(JavaThread::current(), false); | |
546 // Get the youngest frame we will unpack (last to be unpacked) | |
547 frame me = unpack_frame.sender(&map); | |
548 int index; | |
549 for (index = 0; index < frames(); index++ ) { | |
550 *element(index)->iframe() = me; | |
551 // Get the caller frame (possibly skeletal) | |
552 me = me.sender(&map); | |
553 } | |
554 | |
555 frame caller_frame = me; | |
556 | |
557 // Do the unpacking of interpreter frames; the frame at index 0 represents the top activation, so it has no callee | |
558 | |
559 // Unpack the frames from the oldest (frames() -1) to the youngest (0) | |
560 | |
561 for (index = frames() - 1; index >= 0 ; index--) { | |
562 int callee_parameters = index == 0 ? 0 : element(index-1)->method()->size_of_parameters(); | |
563 int callee_locals = index == 0 ? 0 : element(index-1)->method()->max_locals(); | |
564 element(index)->unpack_on_stack(callee_parameters, | |
565 callee_locals, | |
566 &caller_frame, | |
567 index == 0, | |
568 exec_mode); | |
569 if (index == frames() - 1) { | |
570 Deoptimization::unwind_callee_save_values(element(index)->iframe(), this); | |
571 } | |
572 caller_frame = *element(index)->iframe(); | |
573 } | |
574 | |
575 | |
576 deallocate_monitor_chunks(); | |
577 } | |
578 | |
579 void vframeArray::deallocate_monitor_chunks() { | |
580 JavaThread* jt = JavaThread::current(); | |
581 for (int index = 0; index < frames(); index++ ) { | |
582 element(index)->free_monitors(jt); | |
583 } | |
584 } | |
585 | |
586 #ifndef PRODUCT | |
587 | |
588 bool vframeArray::structural_compare(JavaThread* thread, GrowableArray<compiledVFrame*>* chunk) { | |
589 if (owner_thread() != thread) return false; | |
590 int index = 0; | |
591 #if 0 // FIXME can't do this comparison | |
592 | |
593 // Compare only within vframe array. | |
594 for (deoptimizedVFrame* vf = deoptimizedVFrame::cast(vframe_at(first_index())); vf; vf = vf->deoptimized_sender_or_null()) { | |
595 if (index >= chunk->length() || !vf->structural_compare(chunk->at(index))) return false; | |
596 index++; | |
597 } | |
598 if (index != chunk->length()) return false; | |
599 #endif | |
600 | |
601 return true; | |
602 } | |
603 | |
604 #endif | |
605 | |
606 address vframeArray::register_location(int i) const { | |
607 assert(0 <= i && i < RegisterMap::reg_count, "index out of bounds"); | |
608 return (address) & _callee_registers[i]; | |
609 } | |
610 | |
611 | |
612 #ifndef PRODUCT | |
613 | |
614 // Printing | |
615 | |
616 // Note: we cannot have print_on as const, as we allocate inside the method | |
617 void vframeArray::print_on_2(outputStream* st) { | |
618 st->print_cr(" - sp: " INTPTR_FORMAT, sp()); | |
619 st->print(" - thread: "); | |
620 Thread::current()->print(); | |
621 st->print_cr(" - frame size: %d", frame_size()); | |
622 for (int index = 0; index < frames() ; index++ ) { | |
623 element(index)->print(st); | |
624 } | |
625 } | |
626 | |
627 void vframeArrayElement::print(outputStream* st) { | |
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628 st->print_cr(" - interpreter_frame -> sp: " INTPTR_FORMAT, iframe()->sp()); |
0 | 629 } |
630 | |
631 void vframeArray::print_value_on(outputStream* st) const { | |
632 st->print_cr("vframeArray [%d] ", frames()); | |
633 } | |
634 | |
635 | |
636 #endif |