Mercurial > hg > truffle
annotate src/share/vm/runtime/deoptimization.cpp @ 14714:b602356a9cfc
additional canonicalizers for accesses and value nodes (improves number of implicit null checks)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Thu, 20 Mar 2014 17:15:36 +0100 |
parents | 29ccc4cbabca |
children | 4ca6dc0799b6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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 "code/debugInfoRec.hpp" | |
28 #include "code/nmethod.hpp" | |
29 #include "code/pcDesc.hpp" | |
30 #include "code/scopeDesc.hpp" | |
31 #include "interpreter/bytecode.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "memory/allocation.inline.hpp" | |
35 #include "memory/oopFactory.hpp" | |
36 #include "memory/resourceArea.hpp" | |
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37 #include "oops/method.hpp" |
1972 | 38 #include "oops/oop.inline.hpp" |
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39 #include "oops/fieldStreams.hpp" |
1972 | 40 #include "prims/jvmtiThreadState.hpp" |
41 #include "runtime/biasedLocking.hpp" | |
42 #include "runtime/compilationPolicy.hpp" | |
43 #include "runtime/deoptimization.hpp" | |
44 #include "runtime/interfaceSupport.hpp" | |
45 #include "runtime/sharedRuntime.hpp" | |
46 #include "runtime/signature.hpp" | |
47 #include "runtime/stubRoutines.hpp" | |
48 #include "runtime/thread.hpp" | |
49 #include "runtime/vframe.hpp" | |
50 #include "runtime/vframeArray.hpp" | |
51 #include "runtime/vframe_hp.hpp" | |
52 #include "utilities/events.hpp" | |
53 #include "utilities/xmlstream.hpp" | |
54 #ifdef TARGET_ARCH_x86 | |
55 # include "vmreg_x86.inline.hpp" | |
56 #endif | |
57 #ifdef TARGET_ARCH_sparc | |
58 # include "vmreg_sparc.inline.hpp" | |
59 #endif | |
60 #ifdef TARGET_ARCH_zero | |
61 # include "vmreg_zero.inline.hpp" | |
62 #endif | |
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63 #ifdef TARGET_ARCH_arm |
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64 # include "vmreg_arm.inline.hpp" |
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65 #endif |
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66 #ifdef TARGET_ARCH_ppc |
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67 # include "vmreg_ppc.inline.hpp" |
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68 #endif |
1972 | 69 #ifdef COMPILER2 |
70 #ifdef TARGET_ARCH_MODEL_x86_32 | |
71 # include "adfiles/ad_x86_32.hpp" | |
72 #endif | |
73 #ifdef TARGET_ARCH_MODEL_x86_64 | |
74 # include "adfiles/ad_x86_64.hpp" | |
75 #endif | |
76 #ifdef TARGET_ARCH_MODEL_sparc | |
77 # include "adfiles/ad_sparc.hpp" | |
78 #endif | |
79 #ifdef TARGET_ARCH_MODEL_zero | |
80 # include "adfiles/ad_zero.hpp" | |
81 #endif | |
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82 #ifdef TARGET_ARCH_MODEL_arm |
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83 # include "adfiles/ad_arm.hpp" |
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84 #endif |
14391 | 85 #ifdef TARGET_ARCH_MODEL_ppc_32 |
86 # include "adfiles/ad_ppc_32.hpp" | |
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87 #endif |
14391 | 88 #ifdef TARGET_ARCH_MODEL_ppc_64 |
89 # include "adfiles/ad_ppc_64.hpp" | |
1972 | 90 #endif |
14391 | 91 #endif // COMPILER2 |
0 | 92 |
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93 #ifdef GRAAL |
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94 #include "graal/graalCompiler.hpp" |
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95 #include "graal/graalJavaAccess.hpp" |
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96 #endif |
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97 |
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98 |
0 | 99 bool DeoptimizationMarker::_is_active = false; |
100 | |
101 Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, | |
102 int caller_adjustment, | |
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103 int caller_actual_parameters, |
0 | 104 int number_of_frames, |
105 intptr_t* frame_sizes, | |
106 address* frame_pcs, | |
107 BasicType return_type) { | |
108 _size_of_deoptimized_frame = size_of_deoptimized_frame; | |
109 _caller_adjustment = caller_adjustment; | |
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110 _caller_actual_parameters = caller_actual_parameters; |
0 | 111 _number_of_frames = number_of_frames; |
112 _frame_sizes = frame_sizes; | |
113 _frame_pcs = frame_pcs; | |
6197 | 114 _register_block = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2, mtCompiler); |
0 | 115 _return_type = return_type; |
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116 _initial_info = 0; |
0 | 117 // PD (x86 only) |
118 _counter_temp = 0; | |
119 _unpack_kind = 0; | |
120 _sender_sp_temp = 0; | |
121 | |
122 _total_frame_sizes = size_of_frames(); | |
123 } | |
124 | |
125 | |
126 Deoptimization::UnrollBlock::~UnrollBlock() { | |
6197 | 127 FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes, mtCompiler); |
128 FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs, mtCompiler); | |
129 FREE_C_HEAP_ARRAY(intptr_t, _register_block, mtCompiler); | |
0 | 130 } |
131 | |
132 | |
133 intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const { | |
134 assert(register_number < RegisterMap::reg_count, "checking register number"); | |
135 return &_register_block[register_number * 2]; | |
136 } | |
137 | |
138 | |
139 | |
140 int Deoptimization::UnrollBlock::size_of_frames() const { | |
141 // Acount first for the adjustment of the initial frame | |
142 int result = _caller_adjustment; | |
143 for (int index = 0; index < number_of_frames(); index++) { | |
144 result += frame_sizes()[index]; | |
145 } | |
146 return result; | |
147 } | |
148 | |
149 | |
150 void Deoptimization::UnrollBlock::print() { | |
151 ttyLocker ttyl; | |
152 tty->print_cr("UnrollBlock"); | |
153 tty->print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame); | |
154 tty->print( " frame_sizes: "); | |
155 for (int index = 0; index < number_of_frames(); index++) { | |
156 tty->print("%d ", frame_sizes()[index]); | |
157 } | |
158 tty->cr(); | |
159 } | |
160 | |
161 | |
162 // In order to make fetch_unroll_info work properly with escape | |
163 // analysis, The method was changed from JRT_LEAF to JRT_BLOCK_ENTRY and | |
164 // ResetNoHandleMark and HandleMark were removed from it. The actual reallocation | |
165 // of previously eliminated objects occurs in realloc_objects, which is | |
166 // called from the method fetch_unroll_info_helper below. | |
167 JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* thread)) | |
168 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
169 // but makes the entry a little slower. There is however a little dance we have to | |
170 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
171 | |
172 // fetch_unroll_info() is called at the beginning of the deoptimization | |
173 // handler. Note this fact before we start generating temporary frames | |
174 // that can confuse an asynchronous stack walker. This counter is | |
175 // decremented at the end of unpack_frames(). | |
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176 if (TraceDeoptimization) { |
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177 tty->print_cr("Deoptimizing thread " INTPTR_FORMAT, thread); |
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178 } |
0 | 179 thread->inc_in_deopt_handler(); |
180 | |
181 return fetch_unroll_info_helper(thread); | |
182 JRT_END | |
183 | |
184 | |
185 // This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap) | |
186 Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* thread) { | |
187 | |
188 // Note: there is a safepoint safety issue here. No matter whether we enter | |
189 // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once | |
190 // the vframeArray is created. | |
191 // | |
192 | |
193 // Allocate our special deoptimization ResourceMark | |
194 DeoptResourceMark* dmark = new DeoptResourceMark(thread); | |
195 assert(thread->deopt_mark() == NULL, "Pending deopt!"); | |
196 thread->set_deopt_mark(dmark); | |
197 | |
198 frame stub_frame = thread->last_frame(); // Makes stack walkable as side effect | |
199 RegisterMap map(thread, true); | |
200 RegisterMap dummy_map(thread, false); | |
201 // Now get the deoptee with a valid map | |
202 frame deoptee = stub_frame.sender(&map); | |
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203 // Set the deoptee nmethod |
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204 assert(thread->deopt_nmethod() == NULL, "Pending deopt!"); |
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205 thread->set_deopt_nmethod(deoptee.cb()->as_nmethod_or_null()); |
0 | 206 |
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207 if (VerifyStack) { |
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208 thread->validate_frame_layout(); |
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209 } |
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210 |
0 | 211 // Create a growable array of VFrames where each VFrame represents an inlined |
212 // Java frame. This storage is allocated with the usual system arena. | |
213 assert(deoptee.is_compiled_frame(), "Wrong frame type"); | |
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214 |
0 | 215 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); |
216 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
217 while (!vf->is_top()) { | |
218 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
219 chunk->push(compiledVFrame::cast(vf)); | |
220 vf = vf->sender(); | |
221 } | |
222 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
223 chunk->push(compiledVFrame::cast(vf)); | |
224 | |
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225 #if defined(COMPILER2) || defined(GRAAL) |
0 | 226 // Reallocate the non-escaping objects and restore their fields. Then |
227 // relock objects if synchronization on them was eliminated. | |
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228 #ifdef COMPILER2 |
4777 | 229 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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230 if (EliminateAllocations) { |
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231 #endif // COMPILER2 |
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232 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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233 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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234 |
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235 // The flag return_oop() indicates call sites which return oop |
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236 // in compiled code. Such sites include java method calls, |
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237 // runtime calls (for example, used to allocate new objects/arrays |
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238 // on slow code path) and any other calls generated in compiled code. |
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239 // It is not guaranteed that we can get such information here only |
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240 // by analyzing bytecode in deoptimized frames. This is why this flag |
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241 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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242 bool save_oop_result = chunk->at(0)->scope()->return_oop(); |
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243 Handle return_value; |
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244 if (save_oop_result) { |
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245 // Reallocation may trigger GC. If deoptimization happened on return from |
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246 // call which returns oop we need to save it since it is not in oopmap. |
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247 oop result = deoptee.saved_oop_result(&map); |
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248 assert(result == NULL || result->is_oop(), "must be oop"); |
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249 return_value = Handle(thread, result); |
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250 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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251 if (TraceDeoptimization) { |
6843 | 252 ttyLocker ttyl; |
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253 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, (void *)result, thread); |
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254 } |
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255 } |
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256 bool reallocated = false; |
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257 if (objects != NULL) { |
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258 JRT_BLOCK |
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259 reallocated = realloc_objects(thread, &deoptee, objects, THREAD); |
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260 JRT_END |
0 | 261 } |
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262 if (reallocated) { |
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263 reassign_fields(&deoptee, &map, objects); |
0 | 264 #ifndef PRODUCT |
265 if (TraceDeoptimization) { | |
266 ttyLocker ttyl; | |
44
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267 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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268 print_objects(objects); |
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269 } |
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270 #endif |
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271 } |
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272 if (save_oop_result) { |
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273 // Restore result. |
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274 deoptee.set_saved_oop_result(&map, return_value()); |
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275 } |
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276 #ifdef COMPILER2 |
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277 } |
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278 if (EliminateLocks) { |
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279 #endif // COMPILER2 |
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280 #ifndef PRODUCT |
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281 bool first = true; |
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282 #endif |
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283 for (int i = 0; i < chunk->length(); i++) { |
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284 compiledVFrame* cvf = chunk->at(i); |
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285 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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286 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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287 if (monitors->is_nonempty()) { |
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288 relock_objects(monitors, thread); |
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289 #ifndef PRODUCT |
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290 if (PrintDeoptimizationDetails) { |
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291 ttyLocker ttyl; |
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292 for (int j = 0; j < monitors->length(); j++) { |
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293 MonitorInfo* mi = monitors->at(j); |
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294 if (mi->eliminated()) { |
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295 if (first) { |
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296 first = false; |
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297 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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298 } |
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299 tty->print_cr(" object <" INTPTR_FORMAT "> locked", (void *)mi->owner()); |
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300 } |
0 | 301 } |
302 } | |
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303 #endif // !PRODUCT |
0 | 304 } |
305 } | |
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306 #ifdef COMPILER2 |
0 | 307 } |
308 } | |
309 #endif // COMPILER2 | |
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310 #endif // COMPILER2 || GRAAL |
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311 |
0 | 312 // Ensure that no safepoint is taken after pointers have been stored |
313 // in fields of rematerialized objects. If a safepoint occurs from here on | |
314 // out the java state residing in the vframeArray will be missed. | |
315 No_Safepoint_Verifier no_safepoint; | |
316 | |
317 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk); | |
318 | |
319 assert(thread->vframe_array_head() == NULL, "Pending deopt!");; | |
320 thread->set_vframe_array_head(array); | |
321 | |
322 // Now that the vframeArray has been created if we have any deferred local writes | |
323 // added by jvmti then we can free up that structure as the data is now in the | |
324 // vframeArray | |
325 | |
326 if (thread->deferred_locals() != NULL) { | |
327 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals(); | |
328 int i = 0; | |
329 do { | |
330 // Because of inlining we could have multiple vframes for a single frame | |
331 // and several of the vframes could have deferred writes. Find them all. | |
332 if (list->at(i)->id() == array->original().id()) { | |
333 jvmtiDeferredLocalVariableSet* dlv = list->at(i); | |
334 list->remove_at(i); | |
335 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
336 delete dlv; | |
337 } else { | |
338 i++; | |
339 } | |
340 } while ( i < list->length() ); | |
341 if (list->length() == 0) { | |
342 thread->set_deferred_locals(NULL); | |
343 // free the list and elements back to C heap. | |
344 delete list; | |
345 } | |
346 | |
347 } | |
348 | |
1692 | 349 #ifndef SHARK |
0 | 350 // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
351 CodeBlob* cb = stub_frame.cb(); | |
352 // Verify we have the right vframeArray | |
353 assert(cb->frame_size() >= 0, "Unexpected frame size"); | |
354 intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); | |
355 | |
1204 | 356 // If the deopt call site is a MethodHandle invoke call site we have |
357 // to adjust the unpack_sp. | |
358 nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); | |
359 if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc())) | |
360 unpack_sp = deoptee.unextended_sp(); | |
361 | |
0 | 362 #ifdef ASSERT |
363 assert(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub(), "just checking"); | |
364 #endif | |
1692 | 365 #else |
366 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
367 #endif // !SHARK | |
368 | |
0 | 369 // This is a guarantee instead of an assert because if vframe doesn't match |
370 // we will unpack the wrong deoptimized frame and wind up in strange places | |
371 // where it will be very difficult to figure out what went wrong. Better | |
372 // to die an early death here than some very obscure death later when the | |
373 // trail is cold. | |
374 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
375 // in that it will fail to detect a problem when there is one. This needs | |
376 // more work in tiger timeframe. | |
377 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
378 | |
379 int number_of_frames = array->frames(); | |
380 | |
381 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
382 // virtual activation, which is the reverse of the elements in the vframes array. | |
6197 | 383 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
0 | 384 // +1 because we always have an interpreter return address for the final slot. |
6197 | 385 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
0 | 386 int popframe_extra_args = 0; |
387 // Create an interpreter return address for the stub to use as its return | |
388 // address so the skeletal frames are perfectly walkable | |
389 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
390 | |
391 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
392 // activation be put back on the expression stack of the caller for reexecution | |
393 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
394 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
395 } | |
396 | |
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397 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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398 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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399 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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400 // |
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401 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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402 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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403 |
14309 | 404 // It's possible that the number of parameters at the call site is |
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405 // different than number of arguments in the callee when method |
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406 // handles are used. If the caller is interpreted get the real |
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407 // value so that the proper amount of space can be added to it's |
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408 // frame. |
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409 bool caller_was_method_handle = false; |
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410 if (deopt_sender.is_interpreted_frame()) { |
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411 methodHandle method = deopt_sender.interpreter_frame_method(); |
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412 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
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413 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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414 // Method handle invokes may involve fairly arbitrary chains of |
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415 // calls so it's impossible to know how much actual space the |
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416 // caller has for locals. |
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417 caller_was_method_handle = true; |
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418 } |
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419 } |
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420 |
0 | 421 // |
422 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
423 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
424 // frame_sizes/frame_pcs[n] youngest frame (int) | |
425 // | |
426 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
427 // owns the space for the return address to it's caller). Confusing ain't it. | |
428 // | |
429 // The vframe array can address vframes with indices running from | |
430 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
431 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
432 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
433 // so things look a little strange in this loop. | |
434 // | |
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435 int callee_parameters = 0; |
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436 int callee_locals = 0; |
0 | 437 for (int index = 0; index < array->frames(); index++ ) { |
438 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
439 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
440 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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441 int caller_parms = callee_parameters; |
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442 if ((index == array->frames() - 1) && caller_was_method_handle) { |
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443 caller_parms = 0; |
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444 } |
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445 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(caller_parms, |
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446 callee_parameters, |
0 | 447 callee_locals, |
448 index == 0, | |
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449 index == array->frames() - 1, |
0 | 450 popframe_extra_args); |
451 // This pc doesn't have to be perfect just good enough to identify the frame | |
452 // as interpreted so the skeleton frame will be walkable | |
453 // The correct pc will be set when the skeleton frame is completely filled out | |
454 // The final pc we store in the loop is wrong and will be overwritten below | |
455 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
456 | |
457 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
458 callee_locals = array->element(index)->method()->max_locals(); | |
459 popframe_extra_args = 0; | |
460 } | |
461 | |
462 // Compute whether the root vframe returns a float or double value. | |
463 BasicType return_type; | |
464 { | |
465 HandleMark hm; | |
466 methodHandle method(thread, array->element(0)->method()); | |
2142 | 467 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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468 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
0 | 469 } |
470 | |
471 // Compute information for handling adapters and adjusting the frame size of the caller. | |
472 int caller_adjustment = 0; | |
473 | |
474 // Compute the amount the oldest interpreter frame will have to adjust | |
475 // its caller's stack by. If the caller is a compiled frame then | |
476 // we pretend that the callee has no parameters so that the | |
477 // extension counts for the full amount of locals and not just | |
478 // locals-parms. This is because without a c2i adapter the parm | |
479 // area as created by the compiled frame will not be usable by | |
480 // the interpreter. (Depending on the calling convention there | |
481 // may not even be enough space). | |
482 | |
483 // QQQ I'd rather see this pushed down into last_frame_adjust | |
484 // and have it take the sender (aka caller). | |
485 | |
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486 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
0 | 487 caller_adjustment = last_frame_adjust(0, callee_locals); |
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488 } else if (callee_locals > callee_parameters) { |
0 | 489 // The caller frame may need extending to accommodate |
490 // non-parameter locals of the first unpacked interpreted frame. | |
491 // Compute that adjustment. | |
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492 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
0 | 493 } |
494 | |
495 // If the sender is deoptimized the we must retrieve the address of the handler | |
496 // since the frame will "magically" show the original pc before the deopt | |
497 // and we'd undo the deopt. | |
498 | |
499 frame_pcs[0] = deopt_sender.raw_pc(); | |
500 | |
1692 | 501 #ifndef SHARK |
0 | 502 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
1692 | 503 #endif // SHARK |
0 | 504 |
505 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, | |
506 caller_adjustment * BytesPerWord, | |
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507 caller_was_method_handle ? 0 : callee_parameters, |
0 | 508 number_of_frames, |
509 frame_sizes, | |
510 frame_pcs, | |
511 return_type); | |
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512 // On some platforms, we need a way to pass some platform dependent |
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513 // information to the unpacking code so the skeletal frames come out |
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514 // correct (initial fp value, unextended sp, ...) |
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515 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
0 | 516 |
517 if (array->frames() > 1) { | |
518 if (VerifyStack && TraceDeoptimization) { | |
6843 | 519 ttyLocker ttyl; |
0 | 520 tty->print_cr("Deoptimizing method containing inlining"); |
521 } | |
522 } | |
523 | |
524 array->set_unroll_block(info); | |
525 return info; | |
526 } | |
527 | |
528 // Called to cleanup deoptimization data structures in normal case | |
529 // after unpacking to stack and when stack overflow error occurs | |
530 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
531 vframeArray *array) { | |
532 | |
533 // Get array if coming from exception | |
534 if (array == NULL) { | |
535 array = thread->vframe_array_head(); | |
536 } | |
537 thread->set_vframe_array_head(NULL); | |
538 | |
539 // Free the previous UnrollBlock | |
540 vframeArray* old_array = thread->vframe_array_last(); | |
541 thread->set_vframe_array_last(array); | |
542 | |
543 if (old_array != NULL) { | |
544 UnrollBlock* old_info = old_array->unroll_block(); | |
545 old_array->set_unroll_block(NULL); | |
546 delete old_info; | |
547 delete old_array; | |
548 } | |
549 | |
550 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
551 // inside the vframeArray (StackValueCollections) | |
552 | |
553 delete thread->deopt_mark(); | |
554 thread->set_deopt_mark(NULL); | |
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555 thread->set_deopt_nmethod(NULL); |
0 | 556 |
557 | |
558 if (JvmtiExport::can_pop_frame()) { | |
559 #ifndef CC_INTERP | |
560 // Regardless of whether we entered this routine with the pending | |
561 // popframe condition bit set, we should always clear it now | |
562 thread->clear_popframe_condition(); | |
563 #else | |
14309 | 564 // C++ interpreter will clear has_pending_popframe when it enters |
0 | 565 // with method_resume. For deopt_resume2 we clear it now. |
566 if (thread->popframe_forcing_deopt_reexecution()) | |
567 thread->clear_popframe_condition(); | |
568 #endif /* CC_INTERP */ | |
569 } | |
570 | |
571 // unpack_frames() is called at the end of the deoptimization handler | |
572 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
573 // so that an asynchronous stack walker can work again. This counter is | |
574 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
575 // the beginning of uncommon_trap(). | |
576 thread->dec_in_deopt_handler(); | |
577 } | |
578 | |
579 | |
580 // Return BasicType of value being returned | |
581 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
582 | |
583 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
584 // allocate will be freed at the end of the routine. | |
585 | |
586 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
587 // but makes the entry a little slower. There is however a little dance we have to | |
588 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
589 ResetNoHandleMark rnhm; // No-op in release/product versions | |
590 HandleMark hm; | |
591 | |
592 frame stub_frame = thread->last_frame(); | |
593 | |
594 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
595 // must point to the vframeArray for the unpack frame. | |
596 vframeArray* array = thread->vframe_array_head(); | |
597 | |
598 #ifndef PRODUCT | |
599 if (TraceDeoptimization) { | |
6843 | 600 ttyLocker ttyl; |
0 | 601 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
602 } | |
603 #endif | |
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604 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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605 stub_frame.pc(), stub_frame.sp(), exec_mode); |
0 | 606 |
607 UnrollBlock* info = array->unroll_block(); | |
608 | |
609 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
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610 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
0 | 611 |
612 BasicType bt = info->return_type(); | |
613 | |
614 // If we have an exception pending, claim that the return type is an oop | |
615 // so the deopt_blob does not overwrite the exception_oop. | |
616 | |
617 if (exec_mode == Unpack_exception) | |
618 bt = T_OBJECT; | |
619 | |
620 // Cleanup thread deopt data | |
621 cleanup_deopt_info(thread, array); | |
622 | |
623 #ifndef PRODUCT | |
624 if (VerifyStack) { | |
625 ResourceMark res_mark; | |
626 | |
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627 thread->validate_frame_layout(); |
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628 |
0 | 629 // Verify that the just-unpacked frames match the interpreter's |
630 // notions of expression stack and locals | |
631 vframeArray* cur_array = thread->vframe_array_last(); | |
632 RegisterMap rm(thread, false); | |
633 rm.set_include_argument_oops(false); | |
634 bool is_top_frame = true; | |
635 int callee_size_of_parameters = 0; | |
636 int callee_max_locals = 0; | |
637 for (int i = 0; i < cur_array->frames(); i++) { | |
638 vframeArrayElement* el = cur_array->element(i); | |
639 frame* iframe = el->iframe(); | |
640 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
641 | |
642 // Get the oop map for this bci | |
643 InterpreterOopMap mask; | |
644 int cur_invoke_parameter_size = 0; | |
645 bool try_next_mask = false; | |
646 int next_mask_expression_stack_size = -1; | |
647 int top_frame_expression_stack_adjustment = 0; | |
648 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
649 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
650 BytecodeStream str(mh); | |
651 str.set_start(iframe->interpreter_frame_bci()); | |
652 int max_bci = mh->code_size(); | |
653 // Get to the next bytecode if possible | |
654 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
655 // Check to see if we can grab the number of outgoing arguments | |
656 // at an uncommon trap for an invoke (where the compiler | |
657 // generates debug info before the invoke has executed) | |
658 Bytecodes::Code cur_code = str.next(); | |
10390 | 659 if (cur_code == Bytecodes::_invokevirtual || |
660 cur_code == Bytecodes::_invokespecial || | |
661 cur_code == Bytecodes::_invokestatic || | |
662 cur_code == Bytecodes::_invokeinterface || | |
663 cur_code == Bytecodes::_invokedynamic) { | |
2142 | 664 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
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665 Symbol* signature = invoke.signature(); |
0 | 666 ArgumentSizeComputer asc(signature); |
667 cur_invoke_parameter_size = asc.size(); | |
10390 | 668 if (invoke.has_receiver()) { |
0 | 669 // Add in receiver |
670 ++cur_invoke_parameter_size; | |
671 } | |
10390 | 672 if (i != 0 && !invoke.is_invokedynamic() && MethodHandles::has_member_arg(invoke.klass(), invoke.name())) { |
673 callee_size_of_parameters++; | |
674 } | |
0 | 675 } |
676 if (str.bci() < max_bci) { | |
677 Bytecodes::Code bc = str.next(); | |
678 if (bc >= 0) { | |
679 // The interpreter oop map generator reports results before | |
680 // the current bytecode has executed except in the case of | |
681 // calls. It seems to be hard to tell whether the compiler | |
682 // has emitted debug information matching the "state before" | |
683 // a given bytecode or the state after, so we try both | |
684 switch (cur_code) { | |
685 case Bytecodes::_invokevirtual: | |
686 case Bytecodes::_invokespecial: | |
687 case Bytecodes::_invokestatic: | |
688 case Bytecodes::_invokeinterface: | |
10390 | 689 case Bytecodes::_invokedynamic: |
0 | 690 case Bytecodes::_athrow: |
691 break; | |
692 default: { | |
693 InterpreterOopMap next_mask; | |
694 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
695 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
696 // Need to subtract off the size of the result type of | |
697 // the bytecode because this is not described in the | |
698 // debug info but returned to the interpreter in the TOS | |
699 // caching register | |
700 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
701 if (bytecode_result_type != T_ILLEGAL) { | |
702 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
703 } | |
704 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
705 try_next_mask = true; | |
706 break; | |
707 } | |
708 } | |
709 } | |
710 } | |
711 | |
712 // Verify stack depth and oops in frame | |
713 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
714 if (!( | |
715 /* SPARC */ | |
716 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
717 /* x86 */ | |
718 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
719 (try_next_mask && | |
720 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
721 top_frame_expression_stack_adjustment))) || | |
722 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
723 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute) && | |
724 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) | |
725 )) { | |
726 ttyLocker ttyl; | |
727 | |
728 // Print out some information that will help us debug the problem | |
729 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
730 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
731 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
732 iframe->interpreter_frame_expression_stack_size()); | |
733 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
734 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
735 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
736 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
737 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
738 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
739 tty->print_cr(" exec_mode = %d", exec_mode); | |
740 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
741 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
742 tty->print_cr(" Interpreted frames:"); | |
743 for (int k = 0; k < cur_array->frames(); k++) { | |
744 vframeArrayElement* el = cur_array->element(k); | |
745 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
746 } | |
747 cur_array->print_on_2(tty); | |
748 guarantee(false, "wrong number of expression stack elements during deopt"); | |
749 } | |
750 VerifyOopClosure verify; | |
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751 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
0 | 752 callee_size_of_parameters = mh->size_of_parameters(); |
753 callee_max_locals = mh->max_locals(); | |
754 is_top_frame = false; | |
755 } | |
756 } | |
757 #endif /* !PRODUCT */ | |
758 | |
759 | |
760 return bt; | |
761 JRT_END | |
762 | |
763 | |
764 int Deoptimization::deoptimize_dependents() { | |
765 Threads::deoptimized_wrt_marked_nmethods(); | |
766 return 0; | |
767 } | |
768 | |
769 | |
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770 #if defined(COMPILER2) || defined(GRAAL) |
0 | 771 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
772 Handle pending_exception(thread->pending_exception()); | |
773 const char* exception_file = thread->exception_file(); | |
774 int exception_line = thread->exception_line(); | |
775 thread->clear_pending_exception(); | |
776 | |
777 for (int i = 0; i < objects->length(); i++) { | |
778 assert(objects->at(i)->is_object(), "invalid debug information"); | |
779 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
780 | |
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781 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 782 oop obj = NULL; |
783 | |
784 if (k->oop_is_instance()) { | |
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785 InstanceKlass* ik = InstanceKlass::cast(k()); |
0 | 786 obj = ik->allocate_instance(CHECK_(false)); |
787 } else if (k->oop_is_typeArray()) { | |
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788 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 789 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
790 int len = sv->field_size() / type2size[ak->element_type()]; | |
791 obj = ak->allocate(len, CHECK_(false)); | |
792 } else if (k->oop_is_objArray()) { | |
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793 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
0 | 794 obj = ak->allocate(sv->field_size(), CHECK_(false)); |
795 } | |
796 | |
797 assert(obj != NULL, "allocation failed"); | |
798 assert(sv->value().is_null(), "redundant reallocation"); | |
799 sv->set_value(obj); | |
800 } | |
801 | |
802 if (pending_exception.not_null()) { | |
803 thread->set_pending_exception(pending_exception(), exception_file, exception_line); | |
804 } | |
805 | |
806 return true; | |
807 } | |
808 | |
809 // restore elements of an eliminated type array | |
810 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
811 int index = 0; | |
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812 intptr_t val; |
0 | 813 |
814 for (int i = 0; i < sv->field_size(); i++) { | |
815 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
816 switch(type) { | |
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817 case T_LONG: case T_DOUBLE: { |
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818 assert(value->type() == T_INT, "Agreement."); |
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819 StackValue* low = |
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820 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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821 #ifdef _LP64 |
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822 jlong res = (jlong)low->get_int(); |
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823 #else |
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824 #ifdef SPARC |
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825 // For SPARC we have to swap high and low words. |
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826 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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827 #else |
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828 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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829 #endif //SPARC |
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830 #endif |
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831 obj->long_at_put(index, res); |
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832 break; |
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833 } |
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834 |
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835 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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836 case T_INT: case T_FLOAT: // 4 bytes. |
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837 assert(value->type() == T_INT, "Agreement."); |
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838 val = value->get_int(); |
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839 obj->int_at_put(index, (jint)*((jint*)&val)); |
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840 break; |
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841 |
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842 case T_SHORT: case T_CHAR: // 2 bytes |
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843 assert(value->type() == T_INT, "Agreement."); |
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844 val = value->get_int(); |
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845 obj->short_at_put(index, (jshort)*((jint*)&val)); |
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846 break; |
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847 |
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848 case T_BOOLEAN: case T_BYTE: // 1 byte |
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849 assert(value->type() == T_INT, "Agreement."); |
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850 val = value->get_int(); |
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851 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
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852 break; |
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853 |
0 | 854 default: |
855 ShouldNotReachHere(); | |
856 } | |
857 index++; | |
858 } | |
859 } | |
860 | |
861 | |
862 // restore fields of an eliminated object array | |
863 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
864 for (int i = 0; i < sv->field_size(); i++) { | |
865 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
866 assert(value->type() == T_OBJECT, "object element expected"); | |
867 obj->obj_at_put(i, value->get_obj()()); | |
868 } | |
869 } | |
870 | |
7222 | 871 class ReassignedField { |
872 public: | |
873 int _offset; | |
874 BasicType _type; | |
875 public: | |
876 ReassignedField() { | |
877 _offset = 0; | |
878 _type = T_ILLEGAL; | |
879 } | |
880 }; | |
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881 |
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882 int compare(ReassignedField* left, ReassignedField* right) { |
7222 | 883 return left->_offset - right->_offset; |
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884 } |
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885 |
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886 // Restore fields of an eliminated instance object using the same field order |
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887 // returned by HotSpotResolvedObjectType.getInstanceFields(true) |
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888 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj) { |
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889 if (klass->superklass() != NULL) { |
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890 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj); |
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891 } |
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892 |
7137
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893 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
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894 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
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895 if (!fs.access_flags().is_static()) { |
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896 ReassignedField field; |
7222 | 897 field._offset = fs.offset(); |
898 field._type = FieldType::basic_type(fs.signature()); | |
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899 fields->append(field); |
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900 } |
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901 } |
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902 fields->sort(compare); |
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903 for (int i = 0; i < fields->length(); i++) { |
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904 intptr_t val; |
12617
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905 ScopeValue* scope_field = sv->field_at(svIndex); |
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906 StackValue* value = StackValue::create_stack_value(fr, reg_map, scope_field); |
7222 | 907 int offset = fields->at(i)._offset; |
908 BasicType type = fields->at(i)._type; | |
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909 switch (type) { |
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910 case T_OBJECT: case T_ARRAY: |
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911 assert(value->type() == T_OBJECT, "Agreement."); |
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912 obj->obj_field_put(offset, value->get_obj()()); |
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913 break; |
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914 |
12617
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915 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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916 case T_INT: case T_FLOAT: { // 4 bytes. |
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917 assert(value->type() == T_INT, "Agreement."); |
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918 bool big_value = false; |
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919 if (i+1 < fields->length() && fields->at(i+1)._type == T_INT) { |
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920 if (scope_field->is_location()) { |
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|
921 Location::Type type = ((LocationValue*) scope_field)->location().type(); |
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|
922 if (type == Location::dbl || type == Location::lng) { |
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923 big_value = true; |
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924 } |
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925 } |
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|
926 if (scope_field->is_constant_int()) { |
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|
927 ScopeValue* next_scope_field = sv->field_at(svIndex + 1); |
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Lukas Stadler <lukas.stadler@jku.at>
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|
928 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
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929 big_value = true; |
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930 } |
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Lukas Stadler <lukas.stadler@jku.at>
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|
931 } |
bca33c3135de
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932 } |
bca33c3135de
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|
933 |
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934 if (big_value) { |
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Lukas Stadler <lukas.stadler@jku.at>
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|
935 i++; |
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Lukas Stadler <lukas.stadler@jku.at>
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|
936 assert(i < fields->length(), "second T_INT field needed"); |
bca33c3135de
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Lukas Stadler <lukas.stadler@jku.at>
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|
937 assert(fields->at(i)._type == T_INT, "T_INT field needed"); |
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Lukas Stadler <lukas.stadler@jku.at>
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938 } else { |
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diff
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|
939 val = value->get_int(); |
bca33c3135de
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Lukas Stadler <lukas.stadler@jku.at>
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|
940 obj->int_field_put(offset, (jint)*((jint*)&val)); |
bca33c3135de
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Lukas Stadler <lukas.stadler@jku.at>
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|
941 break; |
bca33c3135de
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Lukas Stadler <lukas.stadler@jku.at>
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|
942 } |
bca33c3135de
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943 } |
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Lukas Stadler <lukas.stadler@jku.at>
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|
944 /* no break */ |
bca33c3135de
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Lukas Stadler <lukas.stadler@jku.at>
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|
945 |
6948
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Doug Simon <doug.simon@oracle.com>
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|
946 case T_LONG: case T_DOUBLE: { |
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Doug Simon <doug.simon@oracle.com>
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|
947 assert(value->type() == T_INT, "Agreement."); |
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Doug Simon <doug.simon@oracle.com>
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|
948 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
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|
949 #ifdef _LP64 |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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|
950 jlong res = (jlong)low->get_int(); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
951 #else |
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Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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|
952 #ifdef SPARC |
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Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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|
953 // For SPARC we have to swap high and low words. |
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|
954 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
e522a00b91aa
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|
955 #else |
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|
956 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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|
957 #endif //SPARC |
e522a00b91aa
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|
958 #endif |
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|
959 obj->long_field_put(offset, res); |
e522a00b91aa
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|
960 break; |
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Doug Simon <doug.simon@oracle.com>
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|
961 } |
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Doug Simon <doug.simon@oracle.com>
diff
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|
962 |
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Doug Simon <doug.simon@oracle.com>
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|
963 case T_SHORT: case T_CHAR: // 2 bytes |
e522a00b91aa
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|
964 assert(value->type() == T_INT, "Agreement."); |
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|
965 val = value->get_int(); |
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|
966 obj->short_field_put(offset, (jshort)*((jint*)&val)); |
e522a00b91aa
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|
967 break; |
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|
968 |
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|
969 case T_BOOLEAN: case T_BYTE: // 1 byte |
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|
970 assert(value->type() == T_INT, "Agreement."); |
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|
971 val = value->get_int(); |
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|
972 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
e522a00b91aa
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|
973 break; |
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|
974 |
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|
975 default: |
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|
976 ShouldNotReachHere(); |
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|
977 } |
e522a00b91aa
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|
978 svIndex++; |
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|
979 } |
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980 return svIndex; |
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981 } |
0 | 982 |
983 // restore fields of all eliminated objects and arrays | |
984 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects) { | |
985 for (int i = 0; i < objects->length(); i++) { | |
986 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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987 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 988 Handle obj = sv->value(); |
989 assert(obj.not_null(), "reallocation was missed"); | |
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990 if (PrintDeoptimizationDetails) { |
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991 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
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992 } |
0 | 993 |
994 if (k->oop_is_instance()) { | |
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995 InstanceKlass* ik = InstanceKlass::cast(k()); |
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996 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj()); |
0 | 997 } else if (k->oop_is_typeArray()) { |
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998 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 999 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
1000 } else if (k->oop_is_objArray()) { | |
1001 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
1002 } | |
1003 } | |
1004 } | |
1005 | |
1006 | |
1007 // relock objects for which synchronization was eliminated | |
83
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1008 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread) { |
0 | 1009 for (int i = 0; i < monitors->length(); i++) { |
83
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1010 MonitorInfo* mon_info = monitors->at(i); |
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1011 if (mon_info->eliminated()) { |
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1012 assert(mon_info->owner() != NULL, "reallocation was missed"); |
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1013 Handle obj = Handle(mon_info->owner()); |
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1014 markOop mark = obj->mark(); |
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1015 if (UseBiasedLocking && mark->has_bias_pattern()) { |
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1016 // New allocated objects may have the mark set to anonymously biased. |
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1017 // Also the deoptimized method may called methods with synchronization |
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1018 // where the thread-local object is bias locked to the current thread. |
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1019 assert(mark->is_biased_anonymously() || |
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1020 mark->biased_locker() == thread, "should be locked to current thread"); |
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1021 // Reset mark word to unbiased prototype. |
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1022 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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1023 obj->set_mark(unbiased_prototype); |
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1024 } |
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1025 BasicLock* lock = mon_info->lock(); |
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1026 ObjectSynchronizer::slow_enter(obj, lock, thread); |
0 | 1027 } |
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1028 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
0 | 1029 } |
1030 } | |
1031 | |
1032 | |
1033 #ifndef PRODUCT | |
1034 // print information about reallocated objects | |
1035 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects) { | |
1036 fieldDescriptor fd; | |
1037 | |
1038 for (int i = 0; i < objects->length(); i++) { | |
1039 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1040 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 1041 Handle obj = sv->value(); |
1042 | |
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1043 tty->print(" object <" INTPTR_FORMAT "> of type ", (void *)sv->value()()); |
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1044 k->print_value(); |
0 | 1045 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
1046 tty->cr(); | |
1047 | |
1048 if (Verbose) { | |
1049 k->oop_print_on(obj(), tty); | |
1050 } | |
1051 } | |
1052 } | |
1053 #endif | |
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1054 #endif // COMPILER2 || GRAAL |
0 | 1055 |
1056 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk) { | |
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1057 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
0 | 1058 |
1059 #ifndef PRODUCT | |
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1060 if (PrintDeoptimizationDetails) { |
0 | 1061 ttyLocker ttyl; |
1062 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
1063 fr.print_on(tty); | |
1064 tty->print_cr(" Virtual frames (innermost first):"); | |
1065 for (int index = 0; index < chunk->length(); index++) { | |
1066 compiledVFrame* vf = chunk->at(index); | |
1067 tty->print(" %2d - ", index); | |
1068 vf->print_value(); | |
1069 int bci = chunk->at(index)->raw_bci(); | |
1070 const char* code_name; | |
1071 if (bci == SynchronizationEntryBCI) { | |
1072 code_name = "sync entry"; | |
1073 } else { | |
2142 | 1074 Bytecodes::Code code = vf->method()->code_at(bci); |
0 | 1075 code_name = Bytecodes::name(code); |
1076 } | |
1077 tty->print(" - %s", code_name); | |
1078 tty->print_cr(" @ bci %d ", bci); | |
1079 if (Verbose) { | |
1080 vf->print(); | |
1081 tty->cr(); | |
1082 } | |
1083 } | |
1084 } | |
1085 #endif | |
1086 | |
1087 // Register map for next frame (used for stack crawl). We capture | |
1088 // the state of the deopt'ing frame's caller. Thus if we need to | |
1089 // stuff a C2I adapter we can properly fill in the callee-save | |
1090 // register locations. | |
1091 frame caller = fr.sender(reg_map); | |
1092 int frame_size = caller.sp() - fr.sp(); | |
1093 | |
1094 frame sender = caller; | |
1095 | |
1096 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
1097 // the vframeArray containing the unpacking information is allocated in the C heap. | |
1098 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
1099 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr); | |
1100 | |
1101 // Compare the vframeArray to the collected vframes | |
1102 assert(array->structural_compare(thread, chunk), "just checking"); | |
1103 | |
1104 #ifndef PRODUCT | |
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1105 if (PrintDeoptimizationDetails) { |
0 | 1106 ttyLocker ttyl; |
1107 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
1108 } | |
1109 #endif // PRODUCT | |
1110 | |
1111 return array; | |
1112 } | |
1113 | |
1114 | |
1115 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
1116 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
1117 for (int i = 0; i < monitors->length(); i++) { | |
1118 MonitorInfo* mon_info = monitors->at(i); | |
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1119 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
0 | 1120 objects_to_revoke->append(Handle(mon_info->owner())); |
1121 } | |
1122 } | |
1123 } | |
1124 | |
1125 | |
1126 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
1127 if (!UseBiasedLocking) { | |
1128 return; | |
1129 } | |
1130 | |
1131 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1132 | |
1133 // Unfortunately we don't have a RegisterMap available in most of | |
1134 // the places we want to call this routine so we need to walk the | |
1135 // stack again to update the register map. | |
1136 if (map == NULL || !map->update_map()) { | |
1137 StackFrameStream sfs(thread, true); | |
1138 bool found = false; | |
1139 while (!found && !sfs.is_done()) { | |
1140 frame* cur = sfs.current(); | |
1141 sfs.next(); | |
1142 found = cur->id() == fr.id(); | |
1143 } | |
1144 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
1145 map = sfs.register_map(); | |
1146 } | |
1147 | |
1148 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
1149 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1150 // Revoke monitors' biases in all scopes | |
1151 while (!cvf->is_top()) { | |
1152 collect_monitors(cvf, objects_to_revoke); | |
1153 cvf = compiledVFrame::cast(cvf->sender()); | |
1154 } | |
1155 collect_monitors(cvf, objects_to_revoke); | |
1156 | |
1157 if (SafepointSynchronize::is_at_safepoint()) { | |
1158 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1159 } else { | |
1160 BiasedLocking::revoke(objects_to_revoke); | |
1161 } | |
1162 } | |
1163 | |
1164 | |
1165 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
1166 if (!UseBiasedLocking) { | |
1167 return; | |
1168 } | |
1169 | |
1170 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
1171 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1172 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
1173 if (jt->has_last_Java_frame()) { | |
1174 StackFrameStream sfs(jt, true); | |
1175 while (!sfs.is_done()) { | |
1176 frame* cur = sfs.current(); | |
1177 if (cb->contains(cur->pc())) { | |
1178 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
1179 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1180 // Revoke monitors' biases in all scopes | |
1181 while (!cvf->is_top()) { | |
1182 collect_monitors(cvf, objects_to_revoke); | |
1183 cvf = compiledVFrame::cast(cvf->sender()); | |
1184 } | |
1185 collect_monitors(cvf, objects_to_revoke); | |
1186 } | |
1187 sfs.next(); | |
1188 } | |
1189 } | |
1190 } | |
1191 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1192 } | |
1193 | |
1194 | |
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1195 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
0 | 1196 assert(fr.can_be_deoptimized(), "checking frame type"); |
1197 | |
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1198 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
0 | 1199 |
1200 // Patch the nmethod so that when execution returns to it we will | |
1201 // deopt the execution state and return to the interpreter. | |
1202 fr.deoptimize(thread); | |
1203 } | |
1204 | |
1205 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map) { | |
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1206 deoptimize(thread, fr, map, Reason_constraint); |
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1207 } |
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1208 |
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1209 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
0 | 1210 // Deoptimize only if the frame comes from compile code. |
1211 // Do not deoptimize the frame which is already patched | |
1212 // during the execution of the loops below. | |
1213 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
1214 return; | |
1215 } | |
1216 ResourceMark rm; | |
1217 DeoptimizationMarker dm; | |
1218 if (UseBiasedLocking) { | |
1219 revoke_biases_of_monitors(thread, fr, map); | |
1220 } | |
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1221 deoptimize_single_frame(thread, fr, reason); |
0 | 1222 |
1223 } | |
1224 | |
1225 | |
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1226 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1227 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
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1228 "can only deoptimize other thread at a safepoint"); |
0 | 1229 // Compute frame and register map based on thread and sp. |
1230 RegisterMap reg_map(thread, UseBiasedLocking); | |
1231 frame fr = thread->last_frame(); | |
1232 while (fr.id() != id) { | |
1233 fr = fr.sender(®_map); | |
1234 } | |
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1235 deoptimize(thread, fr, ®_map, reason); |
0 | 1236 } |
1237 | |
1238 | |
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1239 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1240 if (thread == Thread::current()) { |
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1241 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
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1242 } else { |
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1243 VM_DeoptimizeFrame deopt(thread, id, reason); |
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1244 VMThread::execute(&deopt); |
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1245 } |
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1246 } |
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1247 |
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1248 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id) { |
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1249 deoptimize_frame(thread, id, Reason_constraint); |
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1250 } |
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1251 |
0 | 1252 // JVMTI PopFrame support |
1253 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
1254 { | |
1255 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
1256 } | |
1257 JRT_END | |
1258 | |
1259 | |
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1260 #if defined(COMPILER2) || defined(SHARK) || defined(GRAAL) |
0 | 1261 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
1262 // in case of an unresolved klass entry, load the class. | |
1263 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
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1264 Klass* tk = constant_pool->klass_at(index, CHECK); |
0 | 1265 return; |
1266 } | |
1267 | |
1268 if (!constant_pool->tag_at(index).is_symbol()) return; | |
1269 | |
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1270 Handle class_loader (THREAD, constant_pool->pool_holder()->class_loader()); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1271 Symbol* symbol = constant_pool->symbol_at(index); |
0 | 1272 |
1273 // class name? | |
1274 if (symbol->byte_at(0) != '(') { | |
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1275 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1276 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
1277 return; | |
1278 } | |
1279 | |
1280 // then it must be a signature! | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1281 ResourceMark rm(THREAD); |
0 | 1282 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
1283 if (ss.is_object()) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1284 Symbol* class_name = ss.as_symbol(CHECK); |
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1285 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1286 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
1287 } | |
1288 } | |
1289 } | |
1290 | |
1291 | |
1292 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
1293 EXCEPTION_MARK; | |
1294 load_class_by_index(constant_pool, index, THREAD); | |
1295 if (HAS_PENDING_EXCEPTION) { | |
1296 // Exception happened during classloading. We ignore the exception here, since it | |
14230
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1297 // is going to be rethrown since the current activation is going to be deoptimized and |
0 | 1298 // the interpreter will re-execute the bytecode. |
1299 CLEAR_PENDING_EXCEPTION; | |
14230
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1300 // Class loading called java code which may have caused a stack |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1301 // overflow. If the exception was thrown right before the return |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1302 // to the runtime the stack is no longer guarded. Reguard the |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1303 // stack otherwise if we return to the uncommon trap blob and the |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1304 // stack bang causes a stack overflow we crash. |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1305 assert(THREAD->is_Java_thread(), "only a java thread can be here"); |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1306 JavaThread* thread = (JavaThread*)THREAD; |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1307 bool guard_pages_enabled = thread->stack_yellow_zone_enabled(); |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1308 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1309 assert(guard_pages_enabled, "stack banging in uncommon trap blob may cause crash"); |
0 | 1310 } |
1311 } | |
1312 | |
1313 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
1314 HandleMark hm; | |
1315 | |
1316 // uncommon_trap() is called at the beginning of the uncommon trap | |
1317 // handler. Note this fact before we start generating temporary frames | |
1318 // that can confuse an asynchronous stack walker. This counter is | |
1319 // decremented at the end of unpack_frames(). | |
1320 thread->inc_in_deopt_handler(); | |
1321 | |
1322 // We need to update the map if we have biased locking. | |
6428
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1323 #ifdef GRAAL |
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1324 // (lstadler) Graal might need to get an exception from the stack, which in turn requires the register map to be valid |
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1325 RegisterMap reg_map(thread, true); |
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1326 #else |
0 | 1327 RegisterMap reg_map(thread, UseBiasedLocking); |
6428
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1328 #endif |
0 | 1329 frame stub_frame = thread->last_frame(); |
1330 frame fr = stub_frame.sender(®_map); | |
1331 // Make sure the calling nmethod is not getting deoptimized and removed | |
1332 // before we are done with it. | |
1333 nmethodLocker nl(fr.pc()); | |
1334 | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4777
diff
changeset
|
1335 // Log a message |
10721
5fc4aedf7910
add relative pc to uncommon trap event entry (helps debugging SEGFAULTs in copmiled code)
Lukas Stadler <lukas.stadler@jku.at>
parents:
10408
diff
changeset
|
1336 Events::log(thread, "Uncommon trap: trap_request=" PTR32_FORMAT " fr.pc=" INTPTR_FORMAT " relative=" INTPTR_FORMAT, |
5fc4aedf7910
add relative pc to uncommon trap event entry (helps debugging SEGFAULTs in copmiled code)
Lukas Stadler <lukas.stadler@jku.at>
parents:
10408
diff
changeset
|
1337 trap_request, fr.pc(), fr.pc() - fr.cb()->code_begin()); |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4777
diff
changeset
|
1338 |
0 | 1339 { |
1340 ResourceMark rm; | |
1341 | |
1342 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
1343 revoke_biases_of_monitors(thread, fr, ®_map); | |
1344 | |
1345 DeoptReason reason = trap_request_reason(trap_request); | |
1346 DeoptAction action = trap_request_action(trap_request); | |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1347 #ifdef GRAAL |
13857
a9604b40f5e7
On HotSpot, debug_id should be an int, not a short
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13768
diff
changeset
|
1348 int debug_id = trap_request_debug_id(trap_request); |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1349 #endif |
0 | 1350 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 |
1351 | |
1352 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
1353 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1354 | |
1355 nmethod* nm = cvf->code(); | |
1356 | |
1357 ScopeDesc* trap_scope = cvf->scope(); | |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1358 |
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1359 if (TraceDeoptimization) { |
13768
a7cb9f383ec4
print name and sig in TraceDeoptimization output
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
13713
diff
changeset
|
1360 tty->print_cr(" bci=%d pc=%d, relative_pc=%d, method=%s" GRAAL_ONLY(", debug_id=%d"), trap_scope->bci(), fr.pc(), fr.pc() - nm->code_begin(), trap_scope->method()->name_and_sig_as_C_string() |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1361 #ifdef GRAAL |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1362 , debug_id |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1363 #endif |
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1364 ); |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1365 } |
0 | 1366 |
1367 methodHandle trap_method = trap_scope->method(); | |
1368 int trap_bci = trap_scope->bci(); | |
13220
2b43fcc68add
Put _pending_deoptimization and _pending_monitorenter under ifdef GRAAL
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13216
diff
changeset
|
1369 #ifdef GRAAL |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1370 oop speculation = thread->pending_failed_speculation(); |
13713
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1371 if (nm->is_compiled_by_graal()) { |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1372 if (speculation != NULL) { |
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1373 oop speculation_log = nm->speculation_log(); |
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1374 if (speculation_log != NULL) { |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1375 if (TraceDeoptimization || TraceUncollectedSpeculations) { |
13642
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1376 if (SpeculationLog::lastFailed(speculation_log) != NULL) { |
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1377 tty->print_cr("A speculation that was not collected by the compiler is being overwritten"); |
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1378 } |
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1379 } |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1380 if (TraceDeoptimization) { |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1381 tty->print_cr("Saving speculation to speculation log"); |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1382 } |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1383 SpeculationLog::set_lastFailed(speculation_log, speculation); |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1384 } else { |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1385 if (TraceDeoptimization) { |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1386 tty->print_cr("Speculation present but no speculation log"); |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1387 } |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1388 } |
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1389 thread->set_pending_failed_speculation(NULL); |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1390 } else { |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1391 if (TraceDeoptimization) { |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1392 tty->print_cr("No speculation"); |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1393 } |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1394 } |
13713
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1395 } else { |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1396 #ifdef ASSERT |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1397 assert(speculation == NULL, "There should not be a speculation for method compiled by other compilers"); |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1398 #endif |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1399 } |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1400 |
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1401 if (trap_bci == SynchronizationEntryBCI) { |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1402 trap_bci = 0; |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1403 Thread::current()->set_pending_monitorenter(true); |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1404 } |
13220
2b43fcc68add
Put _pending_deoptimization and _pending_monitorenter under ifdef GRAAL
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13216
diff
changeset
|
1405 #endif |
2142 | 1406 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
0 | 1407 |
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1408 if (trap_scope->rethrow_exception()) { |
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
1409 if (PrintDeoptimizationDetails) { |
6948
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
1410 tty->print_cr("Exception to be rethrown in the interpreter for method %s::%s at bci %d", trap_method->method_holder()->name()->as_C_string(), trap_method->name()->as_C_string(), trap_bci); |
3019
77bb196828cb
Fixed an issue with accessing non-initialized static fields.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3018
diff
changeset
|
1411 } |
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1412 GrowableArray<ScopeValue*>* expressions = trap_scope->expressions(); |
3167
132aa6f2bbc0
Fixed rethrow exception frame state (again.. and this time added some useful assertions).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3153
diff
changeset
|
1413 guarantee(expressions != NULL, "must have exception to throw"); |
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1414 ScopeValue* topOfStack = expressions->top(); |
8151
b8f261ba79c6
Minimize diff to plain HotSpot version.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8124
diff
changeset
|
1415 Handle topOfStackObj = StackValue::create_stack_value(&fr, ®_map, topOfStack)->get_obj(); |
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1416 THREAD->set_pending_exception(topOfStackObj(), NULL, 0); |
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1417 } |
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
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1418 |
0 | 1419 // Record this event in the histogram. |
1420 gather_statistics(reason, action, trap_bc); | |
1421 | |
1422 // Ensure that we can record deopt. history: | |
1423 bool create_if_missing = ProfileTraps; | |
1424 | |
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1425 methodHandle profiled_method; |
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|
1426 #ifdef GRAAL |
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1427 if (nm->is_compiled_by_graal()) { |
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|
1428 profiled_method = nm->method(); |
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1429 } else { |
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1430 profiled_method = trap_method; |
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Gilles Duboscq <duboscq@ssw.jku.at>
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diff
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|
1431 } |
9570
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|
1432 #else |
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|
1433 profiled_method = trap_method; |
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diff
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|
1434 #endif |
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|
1435 |
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1436 MethodData* trap_mdo = |
9570
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|
1437 get_method_data(thread, profiled_method, create_if_missing); |
0 | 1438 |
7193
ee32440febeb
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|
1439 // Log a message |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
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|
1440 Events::log_deopt_message(thread, "Uncommon trap: reason=%s action=%s pc=" INTPTR_FORMAT " method=%s @ %d", |
ee32440febeb
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vlivanov
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6940
diff
changeset
|
1441 trap_reason_name(reason), trap_action_name(action), fr.pc(), |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
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diff
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|
1442 trap_method->name_and_sig_as_C_string(), trap_bci); |
ee32440febeb
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vlivanov
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diff
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|
1443 |
0 | 1444 // Print a bunch of diagnostics, if requested. |
1445 if (TraceDeoptimization || LogCompilation) { | |
1446 ResourceMark rm; | |
1447 ttyLocker ttyl; | |
1448 char buf[100]; | |
1449 if (xtty != NULL) { | |
1450 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
1451 os::current_thread_id(), | |
1452 format_trap_request(buf, sizeof(buf), trap_request)); | |
1453 nm->log_identity(xtty); | |
1454 } | |
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2142
diff
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|
1455 Symbol* class_name = NULL; |
0 | 1456 bool unresolved = false; |
1457 if (unloaded_class_index >= 0) { | |
1458 constantPoolHandle constants (THREAD, trap_method->constants()); | |
1459 if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) { | |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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|
1460 class_name = constants->klass_name_at(unloaded_class_index); |
0 | 1461 unresolved = true; |
1462 if (xtty != NULL) | |
1463 xtty->print(" unresolved='1'"); | |
1464 } else if (constants->tag_at(unloaded_class_index).is_symbol()) { | |
2177
3582bf76420e
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|
1465 class_name = constants->symbol_at(unloaded_class_index); |
0 | 1466 } |
1467 if (xtty != NULL) | |
1468 xtty->name(class_name); | |
1469 } | |
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|
1470 if (xtty != NULL && trap_mdo != NULL) { |
0 | 1471 // Dump the relevant MDO state. |
1472 // This is the deopt count for the current reason, any previous | |
1473 // reasons or recompiles seen at this point. | |
1474 int dcnt = trap_mdo->trap_count(reason); | |
1475 if (dcnt != 0) | |
1476 xtty->print(" count='%d'", dcnt); | |
1477 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
1478 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
1479 if (dos != 0) { | |
1480 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
1481 if (trap_state_is_recompiled(dos)) { | |
1482 int recnt2 = trap_mdo->overflow_recompile_count(); | |
1483 if (recnt2 != 0) | |
1484 xtty->print(" recompiles2='%d'", recnt2); | |
1485 } | |
1486 } | |
1487 } | |
1488 if (xtty != NULL) { | |
1489 xtty->stamp(); | |
1490 xtty->end_head(); | |
1491 } | |
1492 if (TraceDeoptimization) { // make noise on the tty | |
1493 tty->print("Uncommon trap occurred in"); | |
1494 nm->method()->print_short_name(tty); | |
12517
b2882f4ab612
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Gilles Duboscq <duboscq@ssw.jku.at>
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12356
diff
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|
1495 #ifdef GRAAL |
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Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
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|
1496 oop installedCode = nm->graal_installed_code(); |
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
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|
1497 if (installedCode != NULL) { |
b2882f4ab612
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Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1498 oop installedCodeName = HotSpotNmethod::name(installedCode); |
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Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
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|
1499 if (installedCodeName != NULL) { |
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1500 tty->print(" (Graal: installedCodeName=%s) ", java_lang_String::as_utf8_string(installedCodeName)); |
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1501 } else { |
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1502 tty->print(" (Graal: installed code has no name) "); |
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1503 } |
12561
d1f8d0538b79
Only print "Graal: no installed code" in deopt if nmethod is compiled by Graal
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12517
diff
changeset
|
1504 } else if (nm->is_compiled_by_graal()) { |
12517
b2882f4ab612
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Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1505 tty->print(" (Graal: no installed code) "); |
b2882f4ab612
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Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
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|
1506 } |
b2882f4ab612
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Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1507 #endif //GRAAL |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1508 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d" GRAAL_ONLY(" debug_id=%d"), |
0 | 1509 fr.pc(), |
6843 | 1510 os::current_thread_id(), |
0 | 1511 trap_reason_name(reason), |
1512 trap_action_name(action), | |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1513 unloaded_class_index |
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1514 #ifdef GRAAL |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1515 , debug_id |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1516 #endif |
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
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|
1517 ); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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2142
diff
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|
1518 if (class_name != NULL) { |
0 | 1519 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
1520 class_name->print_symbol_on(tty); | |
1521 } | |
1522 tty->cr(); | |
1523 } | |
1524 if (xtty != NULL) { | |
1525 // Log the precise location of the trap. | |
1526 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
1527 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
1528 xtty->method(sd->method()); | |
1529 xtty->end_elem(); | |
1530 if (sd->is_top()) break; | |
1531 } | |
1532 xtty->tail("uncommon_trap"); | |
1533 } | |
1534 } | |
1535 // (End diagnostic printout.) | |
1536 | |
1537 // Load class if necessary | |
1538 if (unloaded_class_index >= 0) { | |
1539 constantPoolHandle constants(THREAD, trap_method->constants()); | |
1540 load_class_by_index(constants, unloaded_class_index); | |
1541 } | |
1542 | |
1543 // Flush the nmethod if necessary and desirable. | |
1544 // | |
1545 // We need to avoid situations where we are re-flushing the nmethod | |
1546 // because of a hot deoptimization site. Repeated flushes at the same | |
1547 // point need to be detected by the compiler and avoided. If the compiler | |
1548 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
1549 // module must take measures to avoid an infinite cycle of recompilation | |
1550 // and deoptimization. There are several such measures: | |
1551 // | |
1552 // 1. If a recompilation is ordered a second time at some site X | |
1553 // and for the same reason R, the action is adjusted to 'reinterpret', | |
1554 // to give the interpreter time to exercise the method more thoroughly. | |
1555 // If this happens, the method's overflow_recompile_count is incremented. | |
1556 // | |
1557 // 2. If the compiler fails to reduce the deoptimization rate, then | |
1558 // the method's overflow_recompile_count will begin to exceed the set | |
1559 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
1560 // is adjusted to 'make_not_compilable', and the method is abandoned | |
1561 // to the interpreter. This is a performance hit for hot methods, | |
1562 // but is better than a disastrous infinite cycle of recompilations. | |
1563 // (Actually, only the method containing the site X is abandoned.) | |
1564 // | |
1565 // 3. In parallel with the previous measures, if the total number of | |
1566 // recompilations of a method exceeds the much larger set limit | |
1567 // PerMethodRecompilationCutoff, the method is abandoned. | |
1568 // This should only happen if the method is very large and has | |
1569 // many "lukewarm" deoptimizations. The code which enforces this | |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
1570 // limit is elsewhere (class nmethod, class Method). |
0 | 1571 // |
1572 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
1573 // to recompile at each bytecode independently of the per-BCI cutoff. | |
1574 // | |
1575 // The decision to update code is up to the compiler, and is encoded | |
1576 // in the Action_xxx code. If the compiler requests Action_none | |
1577 // no trap state is changed, no compiled code is changed, and the | |
1578 // computation suffers along in the interpreter. | |
1579 // | |
1580 // The other action codes specify various tactics for decompilation | |
1581 // and recompilation. Action_maybe_recompile is the loosest, and | |
1582 // allows the compiled code to stay around until enough traps are seen, | |
1583 // and until the compiler gets around to recompiling the trapping method. | |
1584 // | |
1585 // The other actions cause immediate removal of the present code. | |
1586 | |
1587 bool update_trap_state = true; | |
1588 bool make_not_entrant = false; | |
1589 bool make_not_compilable = false; | |
1783 | 1590 bool reprofile = false; |
0 | 1591 switch (action) { |
1592 case Action_none: | |
1593 // Keep the old code. | |
1594 update_trap_state = false; | |
1595 break; | |
1596 case Action_maybe_recompile: | |
1597 // Do not need to invalidate the present code, but we can | |
1598 // initiate another | |
1599 // Start compiler without (necessarily) invalidating the nmethod. | |
1600 // The system will tolerate the old code, but new code should be | |
1601 // generated when possible. | |
1602 break; | |
1603 case Action_reinterpret: | |
1604 // Go back into the interpreter for a while, and then consider | |
1605 // recompiling form scratch. | |
1606 make_not_entrant = true; | |
1607 // Reset invocation counter for outer most method. | |
1608 // This will allow the interpreter to exercise the bytecodes | |
1609 // for a while before recompiling. | |
1610 // By contrast, Action_make_not_entrant is immediate. | |
1611 // | |
1612 // Note that the compiler will track null_check, null_assert, | |
1613 // range_check, and class_check events and log them as if they | |
1614 // had been traps taken from compiled code. This will update | |
1615 // the MDO trap history so that the next compilation will | |
1616 // properly detect hot trap sites. | |
1783 | 1617 reprofile = true; |
0 | 1618 break; |
1619 case Action_make_not_entrant: | |
1620 // Request immediate recompilation, and get rid of the old code. | |
1621 // Make them not entrant, so next time they are called they get | |
1622 // recompiled. Unloaded classes are loaded now so recompile before next | |
1623 // time they are called. Same for uninitialized. The interpreter will | |
1624 // link the missing class, if any. | |
1625 make_not_entrant = true; | |
1626 break; | |
1627 case Action_make_not_compilable: | |
1628 // Give up on compiling this method at all. | |
1629 make_not_entrant = true; | |
1630 make_not_compilable = true; | |
1631 break; | |
1632 default: | |
1633 ShouldNotReachHere(); | |
1634 } | |
1635 | |
1636 // Setting +ProfileTraps fixes the following, on all platforms: | |
1637 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
1638 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
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|
1639 // recompile relies on a MethodData* to record heroic opt failures. |
0 | 1640 |
1641 // Whether the interpreter is producing MDO data or not, we also need | |
1642 // to use the MDO to detect hot deoptimization points and control | |
1643 // aggressive optimization. | |
1206
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diff
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|
1644 bool inc_recompile_count = false; |
87684f1a88b5
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diff
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|
1645 ProfileData* pdata = NULL; |
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|
1646 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
12356
359f7e70ae7f
Reduce HotSpot diff and fix previous merge
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12355
diff
changeset
|
1647 assert(trap_mdo == get_method_data(thread, profiled_method, false), "sanity"); |
0 | 1648 uint this_trap_count = 0; |
1649 bool maybe_prior_trap = false; | |
1650 bool maybe_prior_recompile = false; | |
5114
dad1ac9dba7d
finished first implementation of disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
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5110
diff
changeset
|
1651 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
13216
51e97f88c771
Profile deoptimizations of OSR methods separately.
Roland Schatz <roland.schatz@oracle.com>
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13188
diff
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|
1652 #ifdef GRAAL |
51e97f88c771
Profile deoptimizations of OSR methods separately.
Roland Schatz <roland.schatz@oracle.com>
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13188
diff
changeset
|
1653 nm->is_compiled_by_graal() && nm->is_osr_method(), |
51e97f88c771
Profile deoptimizations of OSR methods separately.
Roland Schatz <roland.schatz@oracle.com>
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|
1654 #endif |
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14460
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changeset
|
1655 nm->method(), |
0 | 1656 //outputs: |
1657 this_trap_count, | |
1658 maybe_prior_trap, | |
1659 maybe_prior_recompile); | |
1660 // Because the interpreter also counts null, div0, range, and class | |
1661 // checks, these traps from compiled code are double-counted. | |
1662 // This is harmless; it just means that the PerXTrapLimit values | |
1663 // are in effect a little smaller than they look. | |
1664 | |
1665 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
1666 if (per_bc_reason != Reason_none) { | |
1667 // Now take action based on the partially known per-BCI history. | |
1668 if (maybe_prior_trap | |
1669 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
1670 // If there are too many traps at this BCI, force a recompile. | |
1671 // This will allow the compiler to see the limit overflow, and | |
1672 // take corrective action, if possible. The compiler generally | |
1673 // does not use the exact PerBytecodeTrapLimit value, but instead | |
1674 // changes its tactics if it sees any traps at all. This provides | |
1675 // a little hysteresis, delaying a recompile until a trap happens | |
1676 // several times. | |
1677 // | |
1678 // Actually, since there is only one bit of counter per BCI, | |
1679 // the possible per-BCI counts are {0,1,(per-method count)}. | |
1680 // This produces accurate results if in fact there is only | |
1681 // one hot trap site, but begins to get fuzzy if there are | |
1682 // many sites. For example, if there are ten sites each | |
1683 // trapping two or more times, they each get the blame for | |
1684 // all of their traps. | |
1685 make_not_entrant = true; | |
1686 } | |
1687 | |
1688 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
1689 if (make_not_entrant && maybe_prior_recompile) { | |
1690 // More than one recompile at this point. | |
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1204
diff
changeset
|
1691 inc_recompile_count = maybe_prior_trap; |
0 | 1692 } |
1693 } else { | |
1694 // For reasons which are not recorded per-bytecode, we simply | |
1695 // force recompiles unconditionally. | |
1696 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
1697 make_not_entrant = true; | |
1698 } | |
1699 | |
1700 // Go back to the compiler if there are too many traps in this method. | |
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roland
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14460
diff
changeset
|
1701 if (this_trap_count >= per_method_trap_limit(reason)) { |
0 | 1702 // If there are too many traps in this method, force a recompile. |
1703 // This will allow the compiler to see the limit overflow, and | |
1704 // take corrective action, if possible. | |
1705 // (This condition is an unlikely backstop only, because the | |
1706 // PerBytecodeTrapLimit is more likely to take effect first, | |
1707 // if it is applicable.) | |
1708 make_not_entrant = true; | |
1709 } | |
1710 | |
1711 // Here's more hysteresis: If there has been a recompile at | |
1712 // this trap point already, run the method in the interpreter | |
1713 // for a while to exercise it more thoroughly. | |
1714 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
1783 | 1715 reprofile = true; |
0 | 1716 } |
1717 | |
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1718 } |
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1719 |
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1720 // Take requested actions on the method: |
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1721 |
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1722 // Recompile |
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1723 if (make_not_entrant) { |
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1724 if (!nm->make_not_entrant()) { |
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1725 return; // the call did not change nmethod's state |
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1726 } |
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1727 |
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1728 if (pdata != NULL) { |
0 | 1729 // Record the recompilation event, if any. |
1730 int tstate0 = pdata->trap_state(); | |
1731 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
1732 if (tstate1 != tstate0) | |
1733 pdata->set_trap_state(tstate1); | |
1734 } | |
1735 } | |
1736 | |
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1737 if (inc_recompile_count) { |
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1738 trap_mdo->inc_overflow_recompile_count(); |
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1739 if ((uint)trap_mdo->overflow_recompile_count() > |
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1740 (uint)PerBytecodeRecompilationCutoff) { |
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1741 // Give up on the method containing the bad BCI. |
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1742 if (trap_method() == nm->method()) { |
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1743 make_not_compilable = true; |
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1744 } else { |
7998 | 1745 trap_method->set_not_compilable(CompLevel_full_optimization, true, "overflow_recompile_count > PerBytecodeRecompilationCutoff"); |
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1746 // But give grace to the enclosing nm->method(). |
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1747 } |
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1748 } |
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1749 } |
0 | 1750 |
1783 | 1751 // Reprofile |
1752 if (reprofile) { | |
1753 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
0 | 1754 } |
1755 | |
1756 // Give up compiling | |
1783 | 1757 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
0 | 1758 assert(make_not_entrant, "consistent"); |
1783 | 1759 nm->method()->set_not_compilable(CompLevel_full_optimization); |
0 | 1760 } |
1761 | |
1762 } // Free marked resources | |
1763 | |
1764 } | |
1765 JRT_END | |
1766 | |
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1767 MethodData* |
0 | 1768 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
1769 bool create_if_missing) { | |
1770 Thread* THREAD = thread; | |
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1771 MethodData* mdo = m()->method_data(); |
0 | 1772 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
1773 // Build an MDO. Ignore errors like OutOfMemory; | |
1774 // that simply means we won't have an MDO to update. | |
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1775 Method::build_interpreter_method_data(m, THREAD); |
0 | 1776 if (HAS_PENDING_EXCEPTION) { |
1777 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
1778 CLEAR_PENDING_EXCEPTION; | |
1779 } | |
1780 mdo = m()->method_data(); | |
1781 } | |
1782 return mdo; | |
1783 } | |
1784 | |
1785 ProfileData* | |
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1786 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
0 | 1787 int trap_bci, |
1788 Deoptimization::DeoptReason reason, | |
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1789 bool update_total_trap_count, |
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1790 #ifdef GRAAL |
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1791 bool is_osr, |
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1792 #endif |
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1793 Method* compiled_method, |
0 | 1794 //outputs: |
1795 uint& ret_this_trap_count, | |
1796 bool& ret_maybe_prior_trap, | |
1797 bool& ret_maybe_prior_recompile) { | |
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1798 bool maybe_prior_trap = false; |
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1799 bool maybe_prior_recompile = false; |
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1800 uint this_trap_count = 0; |
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1801 if (update_total_trap_count) { |
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1802 uint idx = reason; |
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1803 #ifdef GRAAL |
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1804 if (is_osr) { |
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1805 idx += Reason_LIMIT; |
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1806 } |
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1807 #endif |
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1808 uint prior_trap_count = trap_mdo->trap_count(idx); |
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1809 this_trap_count = trap_mdo->inc_trap_count(idx); |
0 | 1810 |
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1811 // If the runtime cannot find a place to store trap history, |
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1812 // it is estimated based on the general condition of the method. |
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1813 // If the method has ever been recompiled, or has ever incurred |
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1814 // a trap with the present reason , then this BCI is assumed |
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1815 // (pessimistically) to be the culprit. |
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1816 maybe_prior_trap = (prior_trap_count != 0); |
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1817 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1818 } |
0 | 1819 ProfileData* pdata = NULL; |
1820 | |
1821 | |
1822 // For reasons which are recorded per bytecode, we check per-BCI data. | |
1823 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
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1824 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
0 | 1825 if (per_bc_reason != Reason_none) { |
1826 // Find the profile data for this BCI. If there isn't one, | |
1827 // try to allocate one from the MDO's set of spares. | |
1828 // This will let us detect a repeated trap at this point. | |
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1829 pdata = trap_mdo->allocate_bci_to_data(trap_bci, reason_is_speculate(reason) ? compiled_method : NULL); |
0 | 1830 |
1831 if (pdata != NULL) { | |
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1832 if (reason_is_speculate(reason) && !pdata->is_SpeculativeTrapData()) { |
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1833 if (LogCompilation && xtty != NULL) { |
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1834 ttyLocker ttyl; |
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1835 // no more room for speculative traps in this MDO |
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1836 xtty->elem("speculative_traps_oom"); |
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1837 } |
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1838 } |
0 | 1839 // Query the trap state of this profile datum. |
1840 int tstate0 = pdata->trap_state(); | |
1841 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
1842 maybe_prior_trap = false; | |
1843 if (!trap_state_is_recompiled(tstate0)) | |
1844 maybe_prior_recompile = false; | |
1845 | |
1846 // Update the trap state of this profile datum. | |
1847 int tstate1 = tstate0; | |
1848 // Record the reason. | |
1849 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
1850 // Store the updated state on the MDO, for next time. | |
1851 if (tstate1 != tstate0) | |
1852 pdata->set_trap_state(tstate1); | |
1853 } else { | |
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1854 if (LogCompilation && xtty != NULL) { |
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1855 ttyLocker ttyl; |
0 | 1856 // Missing MDP? Leave a small complaint in the log. |
1857 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1858 } |
0 | 1859 } |
1860 } | |
1861 | |
1862 // Return results: | |
1863 ret_this_trap_count = this_trap_count; | |
1864 ret_maybe_prior_trap = maybe_prior_trap; | |
1865 ret_maybe_prior_recompile = maybe_prior_recompile; | |
1866 return pdata; | |
1867 } | |
1868 | |
1869 void | |
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1870 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 1871 ResourceMark rm; |
1872 // Ignored outputs: | |
1873 uint ignore_this_trap_count; | |
1874 bool ignore_maybe_prior_trap; | |
1875 bool ignore_maybe_prior_recompile; | |
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1876 // Graal uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
5130 | 1877 bool update_total_counts = GRAAL_ONLY(false) NOT_GRAAL(true); |
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1878 assert(!reason_is_speculate(reason), "reason speculate only used by compiler"); |
0 | 1879 query_update_method_data(trap_mdo, trap_bci, |
1880 (DeoptReason)reason, | |
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1881 update_total_counts, |
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1882 #ifdef GRAAL |
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1883 false, |
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1884 #endif |
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1885 NULL, |
0 | 1886 ignore_this_trap_count, |
1887 ignore_maybe_prior_trap, | |
1888 ignore_maybe_prior_recompile); | |
1889 } | |
1890 | |
1891 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request) { | |
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1892 if (TraceDeoptimization) { |
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1893 tty->print("Uncommon trap "); |
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1894 } |
0 | 1895 // Still in Java no safepoints |
1896 { | |
1897 // This enters VM and may safepoint | |
1898 uncommon_trap_inner(thread, trap_request); | |
1899 } | |
1900 return fetch_unroll_info_helper(thread); | |
1901 } | |
1902 | |
1903 // Local derived constants. | |
1904 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
1905 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
1906 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
1907 | |
1908 //---------------------------trap_state_reason--------------------------------- | |
1909 Deoptimization::DeoptReason | |
1910 Deoptimization::trap_state_reason(int trap_state) { | |
1911 // This assert provides the link between the width of DataLayout::trap_bits | |
1912 // and the encoding of "recorded" reasons. It ensures there are enough | |
1913 // bits to store all needed reasons in the per-BCI MDO profile. | |
1914 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
1915 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1916 trap_state -= recompile_bit; | |
1917 if (trap_state == DS_REASON_MASK) { | |
1918 return Reason_many; | |
1919 } else { | |
1920 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
1921 return (DeoptReason)trap_state; | |
1922 } | |
1923 } | |
1924 //-------------------------trap_state_has_reason------------------------------- | |
1925 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
1926 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
1927 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
1928 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1929 trap_state -= recompile_bit; | |
1930 if (trap_state == DS_REASON_MASK) { | |
1931 return -1; // true, unspecifically (bottom of state lattice) | |
1932 } else if (trap_state == reason) { | |
1933 return 1; // true, definitely | |
1934 } else if (trap_state == 0) { | |
1935 return 0; // false, definitely (top of state lattice) | |
1936 } else { | |
1937 return 0; // false, definitely | |
1938 } | |
1939 } | |
1940 //-------------------------trap_state_add_reason------------------------------- | |
1941 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
1942 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
1943 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1944 trap_state -= recompile_bit; | |
1945 if (trap_state == DS_REASON_MASK) { | |
1946 return trap_state + recompile_bit; // already at state lattice bottom | |
1947 } else if (trap_state == reason) { | |
1948 return trap_state + recompile_bit; // the condition is already true | |
1949 } else if (trap_state == 0) { | |
1950 return reason + recompile_bit; // no condition has yet been true | |
1951 } else { | |
1952 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
1953 } | |
1954 } | |
1955 //-----------------------trap_state_is_recompiled------------------------------ | |
1956 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
1957 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
1958 } | |
1959 //-----------------------trap_state_set_recompiled----------------------------- | |
1960 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
1961 if (z) return trap_state | DS_RECOMPILE_BIT; | |
1962 else return trap_state & ~DS_RECOMPILE_BIT; | |
1963 } | |
1964 //---------------------------format_trap_state--------------------------------- | |
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1965 // This is used for debugging and diagnostics, including LogFile output. |
0 | 1966 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, |
1967 int trap_state) { | |
1968 DeoptReason reason = trap_state_reason(trap_state); | |
1969 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
1970 // Re-encode the state from its decoded components. | |
1971 int decoded_state = 0; | |
1972 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
1973 decoded_state = trap_state_add_reason(decoded_state, reason); | |
1974 if (recomp_flag) | |
1975 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
1976 // If the state re-encodes properly, format it symbolically. | |
1977 // Because this routine is used for debugging and diagnostics, | |
1978 // be robust even if the state is a strange value. | |
1979 size_t len; | |
1980 if (decoded_state != trap_state) { | |
1981 // Random buggy state that doesn't decode?? | |
1982 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
1983 } else { | |
1984 len = jio_snprintf(buf, buflen, "%s%s", | |
1985 trap_reason_name(reason), | |
1986 recomp_flag ? " recompiled" : ""); | |
1987 } | |
1988 if (len >= buflen) | |
1989 buf[buflen-1] = '\0'; | |
1990 return buf; | |
1991 } | |
1992 | |
1993 | |
1994 //--------------------------------statics-------------------------------------- | |
1995 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
1996 = Deoptimization::Action_reinterpret; | |
1997 const char* Deoptimization::_trap_reason_name[Reason_LIMIT] = { | |
1998 // Note: Keep this in sync. with enum DeoptReason. | |
1999 "none", | |
2000 "null_check", | |
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2001 "null_assert" GRAAL_ONLY("|unreached0"), |
0 | 2002 "range_check", |
2003 "class_check", | |
2004 "array_check", | |
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2005 "intrinsic" GRAAL_ONLY("|type_checked_inlining"), |
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2006 "bimorphic" GRAAL_ONLY("|optimized_type_check"), |
0 | 2007 "unloaded", |
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2008 "uninitialized" GRAAL_ONLY("|unresolved"), |
0 | 2009 "unreached", |
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2010 "unhandled" GRAAL_ONLY("|not_compiled_exception_handler"), |
0 | 2011 "constraint", |
2012 "div0_check", | |
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2013 "age" GRAAL_ONLY("|jsr_mismatch"), |
3345 | 2014 "predicate", |
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2015 "loop_limit_check", |
14518 | 2016 "speculate_class_check", |
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2017 GRAAL_ONLY("aliasing") |
0 | 2018 }; |
2019 const char* Deoptimization::_trap_action_name[Action_LIMIT] = { | |
2020 // Note: Keep this in sync. with enum DeoptAction. | |
2021 "none", | |
2022 "maybe_recompile", | |
2023 "reinterpret", | |
2024 "make_not_entrant", | |
2025 "make_not_compilable" | |
2026 }; | |
2027 | |
2028 const char* Deoptimization::trap_reason_name(int reason) { | |
2029 if (reason == Reason_many) return "many"; | |
2030 if ((uint)reason < Reason_LIMIT) | |
2031 return _trap_reason_name[reason]; | |
2032 static char buf[20]; | |
2033 sprintf(buf, "reason%d", reason); | |
2034 return buf; | |
2035 } | |
2036 const char* Deoptimization::trap_action_name(int action) { | |
2037 if ((uint)action < Action_LIMIT) | |
2038 return _trap_action_name[action]; | |
2039 static char buf[20]; | |
2040 sprintf(buf, "action%d", action); | |
2041 return buf; | |
2042 } | |
2043 | |
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2044 // This is used for debugging and diagnostics, including LogFile output. |
0 | 2045 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, |
2046 int trap_request) { | |
2047 jint unloaded_class_index = trap_request_index(trap_request); | |
2048 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
2049 const char* action = trap_action_name(trap_request_action(trap_request)); | |
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2050 #ifdef GRAAL |
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2051 int debug_id = trap_request_debug_id(trap_request); |
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2052 #endif |
0 | 2053 size_t len; |
2054 if (unloaded_class_index < 0) { | |
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2055 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'" GRAAL_ONLY(" debug_id='%d'"), |
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2056 reason, action |
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2057 #ifdef GRAAL |
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2058 ,debug_id |
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2059 #endif |
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2060 ); |
0 | 2061 } else { |
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2062 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'" GRAAL_ONLY(" debug_id='%d'"), |
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2063 reason, action, unloaded_class_index |
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2064 #ifdef GRAAL |
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2065 ,debug_id |
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2066 #endif |
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2067 ); |
0 | 2068 } |
2069 if (len >= buflen) | |
2070 buf[buflen-1] = '\0'; | |
2071 return buf; | |
2072 } | |
2073 | |
2074 juint Deoptimization::_deoptimization_hist | |
2075 [Deoptimization::Reason_LIMIT] | |
2076 [1 + Deoptimization::Action_LIMIT] | |
2077 [Deoptimization::BC_CASE_LIMIT] | |
2078 = {0}; | |
2079 | |
2080 enum { | |
2081 LSB_BITS = 8, | |
2082 LSB_MASK = right_n_bits(LSB_BITS) | |
2083 }; | |
2084 | |
2085 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2086 Bytecodes::Code bc) { | |
2087 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
2088 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
2089 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
2090 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
2091 juint* cases = _deoptimization_hist[reason][1+action]; | |
2092 juint* bc_counter_addr = NULL; | |
2093 juint bc_counter = 0; | |
2094 // Look for an unused counter, or an exact match to this BC. | |
2095 if (bc != Bytecodes::_illegal) { | |
2096 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
2097 juint* counter_addr = &cases[bc_case]; | |
2098 juint counter = *counter_addr; | |
2099 if ((counter == 0 && bc_counter_addr == NULL) | |
2100 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
2101 // this counter is either free or is already devoted to this BC | |
2102 bc_counter_addr = counter_addr; | |
2103 bc_counter = counter | bc; | |
2104 } | |
2105 } | |
2106 } | |
2107 if (bc_counter_addr == NULL) { | |
2108 // Overflow, or no given bytecode. | |
2109 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
2110 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
2111 } | |
2112 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
2113 } | |
2114 | |
2115 jint Deoptimization::total_deoptimization_count() { | |
2116 return _deoptimization_hist[Reason_none][0][0]; | |
2117 } | |
2118 | |
2119 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
2120 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
2121 return _deoptimization_hist[reason][0][0]; | |
2122 } | |
2123 | |
2124 void Deoptimization::print_statistics() { | |
2125 juint total = total_deoptimization_count(); | |
2126 juint account = total; | |
2127 if (total != 0) { | |
2128 ttyLocker ttyl; | |
2129 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
2130 tty->print_cr("Deoptimization traps recorded:"); | |
2131 #define PRINT_STAT_LINE(name, r) \ | |
2132 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
2133 PRINT_STAT_LINE("total", total); | |
2134 // For each non-zero entry in the histogram, print the reason, | |
2135 // the action, and (if specifically known) the type of bytecode. | |
2136 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
2137 for (int action = 0; action < Action_LIMIT; action++) { | |
2138 juint* cases = _deoptimization_hist[reason][1+action]; | |
2139 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
2140 juint counter = cases[bc_case]; | |
2141 if (counter != 0) { | |
2142 char name[1*K]; | |
2143 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
2144 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
2145 bc = Bytecodes::_illegal; | |
2146 sprintf(name, "%s/%s/%s", | |
2147 trap_reason_name(reason), | |
2148 trap_action_name(action), | |
2149 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
2150 juint r = counter >> LSB_BITS; | |
2151 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
2152 account -= r; | |
2153 } | |
2154 } | |
2155 } | |
2156 } | |
2157 if (account != 0) { | |
2158 PRINT_STAT_LINE("unaccounted", account); | |
2159 } | |
2160 #undef PRINT_STAT_LINE | |
2161 if (xtty != NULL) xtty->tail("statistics"); | |
2162 } | |
2163 } | |
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2164 #else // COMPILER2 || SHARK || GRAAL |
0 | 2165 |
2166 | |
2167 // Stubs for C1 only system. | |
2168 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
2169 return false; | |
2170 } | |
2171 | |
2172 const char* Deoptimization::trap_reason_name(int reason) { | |
2173 return "unknown"; | |
2174 } | |
2175 | |
2176 void Deoptimization::print_statistics() { | |
2177 // no output | |
2178 } | |
2179 | |
2180 void | |
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2181 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 2182 // no udpate |
2183 } | |
2184 | |
2185 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
2186 return 0; | |
2187 } | |
2188 | |
2189 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2190 Bytecodes::Code bc) { | |
2191 // no update | |
2192 } | |
2193 | |
2194 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
2195 int trap_state) { | |
2196 jio_snprintf(buf, buflen, "#%d", trap_state); | |
2197 return buf; | |
2198 } | |
2199 | |
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2200 #endif // COMPILER2 || SHARK || GRAAL |