Mercurial > hg > truffle
annotate src/share/vm/runtime/deoptimization.cpp @ 14909:4ca6dc0799b6
Backout jdk9 merge
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Tue, 01 Apr 2014 13:57:07 +0200 |
parents | 29ccc4cbabca |
children | ed29f7ff71eb |
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 |
14909 | 85 #ifdef TARGET_ARCH_MODEL_ppc |
86 # include "adfiles/ad_ppc.hpp" | |
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87 #endif |
1972 | 88 #endif |
0 | 89 |
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90 #ifdef GRAAL |
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91 #include "graal/graalCompiler.hpp" |
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92 #include "graal/graalJavaAccess.hpp" |
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93 #endif |
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94 |
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95 |
0 | 96 bool DeoptimizationMarker::_is_active = false; |
97 | |
98 Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, | |
99 int caller_adjustment, | |
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100 int caller_actual_parameters, |
0 | 101 int number_of_frames, |
102 intptr_t* frame_sizes, | |
103 address* frame_pcs, | |
104 BasicType return_type) { | |
105 _size_of_deoptimized_frame = size_of_deoptimized_frame; | |
106 _caller_adjustment = caller_adjustment; | |
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107 _caller_actual_parameters = caller_actual_parameters; |
0 | 108 _number_of_frames = number_of_frames; |
109 _frame_sizes = frame_sizes; | |
110 _frame_pcs = frame_pcs; | |
6197 | 111 _register_block = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2, mtCompiler); |
0 | 112 _return_type = return_type; |
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113 _initial_info = 0; |
0 | 114 // PD (x86 only) |
115 _counter_temp = 0; | |
116 _unpack_kind = 0; | |
117 _sender_sp_temp = 0; | |
118 | |
119 _total_frame_sizes = size_of_frames(); | |
120 } | |
121 | |
122 | |
123 Deoptimization::UnrollBlock::~UnrollBlock() { | |
6197 | 124 FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes, mtCompiler); |
125 FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs, mtCompiler); | |
126 FREE_C_HEAP_ARRAY(intptr_t, _register_block, mtCompiler); | |
0 | 127 } |
128 | |
129 | |
130 intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const { | |
131 assert(register_number < RegisterMap::reg_count, "checking register number"); | |
132 return &_register_block[register_number * 2]; | |
133 } | |
134 | |
135 | |
136 | |
137 int Deoptimization::UnrollBlock::size_of_frames() const { | |
138 // Acount first for the adjustment of the initial frame | |
139 int result = _caller_adjustment; | |
140 for (int index = 0; index < number_of_frames(); index++) { | |
141 result += frame_sizes()[index]; | |
142 } | |
143 return result; | |
144 } | |
145 | |
146 | |
147 void Deoptimization::UnrollBlock::print() { | |
148 ttyLocker ttyl; | |
149 tty->print_cr("UnrollBlock"); | |
150 tty->print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame); | |
151 tty->print( " frame_sizes: "); | |
152 for (int index = 0; index < number_of_frames(); index++) { | |
153 tty->print("%d ", frame_sizes()[index]); | |
154 } | |
155 tty->cr(); | |
156 } | |
157 | |
158 | |
159 // In order to make fetch_unroll_info work properly with escape | |
160 // analysis, The method was changed from JRT_LEAF to JRT_BLOCK_ENTRY and | |
161 // ResetNoHandleMark and HandleMark were removed from it. The actual reallocation | |
162 // of previously eliminated objects occurs in realloc_objects, which is | |
163 // called from the method fetch_unroll_info_helper below. | |
164 JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* thread)) | |
165 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
166 // but makes the entry a little slower. There is however a little dance we have to | |
167 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
168 | |
169 // fetch_unroll_info() is called at the beginning of the deoptimization | |
170 // handler. Note this fact before we start generating temporary frames | |
171 // that can confuse an asynchronous stack walker. This counter is | |
172 // decremented at the end of unpack_frames(). | |
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173 if (TraceDeoptimization) { |
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174 tty->print_cr("Deoptimizing thread " INTPTR_FORMAT, thread); |
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175 } |
0 | 176 thread->inc_in_deopt_handler(); |
177 | |
178 return fetch_unroll_info_helper(thread); | |
179 JRT_END | |
180 | |
181 | |
182 // This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap) | |
183 Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* thread) { | |
184 | |
185 // Note: there is a safepoint safety issue here. No matter whether we enter | |
186 // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once | |
187 // the vframeArray is created. | |
188 // | |
189 | |
190 // Allocate our special deoptimization ResourceMark | |
191 DeoptResourceMark* dmark = new DeoptResourceMark(thread); | |
192 assert(thread->deopt_mark() == NULL, "Pending deopt!"); | |
193 thread->set_deopt_mark(dmark); | |
194 | |
195 frame stub_frame = thread->last_frame(); // Makes stack walkable as side effect | |
196 RegisterMap map(thread, true); | |
197 RegisterMap dummy_map(thread, false); | |
198 // Now get the deoptee with a valid map | |
199 frame deoptee = stub_frame.sender(&map); | |
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200 // Set the deoptee nmethod |
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201 assert(thread->deopt_nmethod() == NULL, "Pending deopt!"); |
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202 thread->set_deopt_nmethod(deoptee.cb()->as_nmethod_or_null()); |
0 | 203 |
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204 if (VerifyStack) { |
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205 thread->validate_frame_layout(); |
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206 } |
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207 |
0 | 208 // Create a growable array of VFrames where each VFrame represents an inlined |
209 // Java frame. This storage is allocated with the usual system arena. | |
210 assert(deoptee.is_compiled_frame(), "Wrong frame type"); | |
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211 |
0 | 212 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); |
213 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
214 while (!vf->is_top()) { | |
215 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
216 chunk->push(compiledVFrame::cast(vf)); | |
217 vf = vf->sender(); | |
218 } | |
219 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
220 chunk->push(compiledVFrame::cast(vf)); | |
221 | |
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222 #if defined(COMPILER2) || defined(GRAAL) |
0 | 223 // Reallocate the non-escaping objects and restore their fields. Then |
224 // relock objects if synchronization on them was eliminated. | |
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225 #ifdef COMPILER2 |
4777 | 226 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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227 if (EliminateAllocations) { |
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228 #endif // COMPILER2 |
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229 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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230 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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231 |
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232 // The flag return_oop() indicates call sites which return oop |
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233 // in compiled code. Such sites include java method calls, |
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234 // runtime calls (for example, used to allocate new objects/arrays |
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235 // on slow code path) and any other calls generated in compiled code. |
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236 // It is not guaranteed that we can get such information here only |
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237 // by analyzing bytecode in deoptimized frames. This is why this flag |
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238 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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239 bool save_oop_result = chunk->at(0)->scope()->return_oop(); |
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240 Handle return_value; |
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241 if (save_oop_result) { |
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242 // Reallocation may trigger GC. If deoptimization happened on return from |
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243 // call which returns oop we need to save it since it is not in oopmap. |
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244 oop result = deoptee.saved_oop_result(&map); |
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245 assert(result == NULL || result->is_oop(), "must be oop"); |
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246 return_value = Handle(thread, result); |
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247 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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248 if (TraceDeoptimization) { |
6843 | 249 ttyLocker ttyl; |
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250 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, (void *)result, thread); |
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251 } |
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252 } |
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253 bool reallocated = false; |
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254 if (objects != NULL) { |
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255 JRT_BLOCK |
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256 reallocated = realloc_objects(thread, &deoptee, objects, THREAD); |
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257 JRT_END |
0 | 258 } |
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259 if (reallocated) { |
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260 reassign_fields(&deoptee, &map, objects); |
0 | 261 #ifndef PRODUCT |
262 if (TraceDeoptimization) { | |
263 ttyLocker ttyl; | |
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264 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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265 print_objects(objects); |
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266 } |
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267 #endif |
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268 } |
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269 if (save_oop_result) { |
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270 // Restore result. |
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271 deoptee.set_saved_oop_result(&map, return_value()); |
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272 } |
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273 #ifdef COMPILER2 |
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274 } |
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275 if (EliminateLocks) { |
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276 #endif // COMPILER2 |
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277 #ifndef PRODUCT |
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278 bool first = true; |
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279 #endif |
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280 for (int i = 0; i < chunk->length(); i++) { |
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281 compiledVFrame* cvf = chunk->at(i); |
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282 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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283 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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284 if (monitors->is_nonempty()) { |
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285 relock_objects(monitors, thread); |
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286 #ifndef PRODUCT |
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287 if (PrintDeoptimizationDetails) { |
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288 ttyLocker ttyl; |
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289 for (int j = 0; j < monitors->length(); j++) { |
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290 MonitorInfo* mi = monitors->at(j); |
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291 if (mi->eliminated()) { |
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292 if (first) { |
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293 first = false; |
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294 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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295 } |
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296 tty->print_cr(" object <" INTPTR_FORMAT "> locked", (void *)mi->owner()); |
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297 } |
0 | 298 } |
299 } | |
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300 #endif // !PRODUCT |
0 | 301 } |
302 } | |
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303 #ifdef COMPILER2 |
0 | 304 } |
305 } | |
306 #endif // COMPILER2 | |
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307 #endif // COMPILER2 || GRAAL |
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308 |
0 | 309 // Ensure that no safepoint is taken after pointers have been stored |
310 // in fields of rematerialized objects. If a safepoint occurs from here on | |
311 // out the java state residing in the vframeArray will be missed. | |
312 No_Safepoint_Verifier no_safepoint; | |
313 | |
314 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk); | |
315 | |
316 assert(thread->vframe_array_head() == NULL, "Pending deopt!");; | |
317 thread->set_vframe_array_head(array); | |
318 | |
319 // Now that the vframeArray has been created if we have any deferred local writes | |
320 // added by jvmti then we can free up that structure as the data is now in the | |
321 // vframeArray | |
322 | |
323 if (thread->deferred_locals() != NULL) { | |
324 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals(); | |
325 int i = 0; | |
326 do { | |
327 // Because of inlining we could have multiple vframes for a single frame | |
328 // and several of the vframes could have deferred writes. Find them all. | |
329 if (list->at(i)->id() == array->original().id()) { | |
330 jvmtiDeferredLocalVariableSet* dlv = list->at(i); | |
331 list->remove_at(i); | |
332 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
333 delete dlv; | |
334 } else { | |
335 i++; | |
336 } | |
337 } while ( i < list->length() ); | |
338 if (list->length() == 0) { | |
339 thread->set_deferred_locals(NULL); | |
340 // free the list and elements back to C heap. | |
341 delete list; | |
342 } | |
343 | |
344 } | |
345 | |
1692 | 346 #ifndef SHARK |
0 | 347 // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
348 CodeBlob* cb = stub_frame.cb(); | |
349 // Verify we have the right vframeArray | |
350 assert(cb->frame_size() >= 0, "Unexpected frame size"); | |
351 intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); | |
352 | |
1204 | 353 // If the deopt call site is a MethodHandle invoke call site we have |
354 // to adjust the unpack_sp. | |
355 nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); | |
356 if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc())) | |
357 unpack_sp = deoptee.unextended_sp(); | |
358 | |
0 | 359 #ifdef ASSERT |
360 assert(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub(), "just checking"); | |
361 #endif | |
1692 | 362 #else |
363 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
364 #endif // !SHARK | |
365 | |
0 | 366 // This is a guarantee instead of an assert because if vframe doesn't match |
367 // we will unpack the wrong deoptimized frame and wind up in strange places | |
368 // where it will be very difficult to figure out what went wrong. Better | |
369 // to die an early death here than some very obscure death later when the | |
370 // trail is cold. | |
371 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
372 // in that it will fail to detect a problem when there is one. This needs | |
373 // more work in tiger timeframe. | |
374 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
375 | |
376 int number_of_frames = array->frames(); | |
377 | |
378 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
379 // virtual activation, which is the reverse of the elements in the vframes array. | |
6197 | 380 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
0 | 381 // +1 because we always have an interpreter return address for the final slot. |
6197 | 382 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
0 | 383 int popframe_extra_args = 0; |
384 // Create an interpreter return address for the stub to use as its return | |
385 // address so the skeletal frames are perfectly walkable | |
386 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
387 | |
388 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
389 // activation be put back on the expression stack of the caller for reexecution | |
390 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
391 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
392 } | |
393 | |
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394 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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395 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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396 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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397 // |
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398 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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399 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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400 |
14909 | 401 // It's possible that the number of paramters at the call site is |
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402 // different than number of arguments in the callee when method |
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403 // handles are used. If the caller is interpreted get the real |
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404 // value so that the proper amount of space can be added to it's |
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405 // frame. |
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406 bool caller_was_method_handle = false; |
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407 if (deopt_sender.is_interpreted_frame()) { |
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408 methodHandle method = deopt_sender.interpreter_frame_method(); |
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409 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
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410 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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411 // Method handle invokes may involve fairly arbitrary chains of |
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412 // calls so it's impossible to know how much actual space the |
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413 // caller has for locals. |
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414 caller_was_method_handle = true; |
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415 } |
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416 } |
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417 |
0 | 418 // |
419 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
420 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
421 // frame_sizes/frame_pcs[n] youngest frame (int) | |
422 // | |
423 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
424 // owns the space for the return address to it's caller). Confusing ain't it. | |
425 // | |
426 // The vframe array can address vframes with indices running from | |
427 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
428 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
429 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
430 // so things look a little strange in this loop. | |
431 // | |
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432 int callee_parameters = 0; |
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433 int callee_locals = 0; |
0 | 434 for (int index = 0; index < array->frames(); index++ ) { |
435 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
436 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
437 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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438 int caller_parms = callee_parameters; |
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439 if ((index == array->frames() - 1) && caller_was_method_handle) { |
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440 caller_parms = 0; |
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441 } |
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442 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(caller_parms, |
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443 callee_parameters, |
0 | 444 callee_locals, |
445 index == 0, | |
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446 index == array->frames() - 1, |
0 | 447 popframe_extra_args); |
448 // This pc doesn't have to be perfect just good enough to identify the frame | |
449 // as interpreted so the skeleton frame will be walkable | |
450 // The correct pc will be set when the skeleton frame is completely filled out | |
451 // The final pc we store in the loop is wrong and will be overwritten below | |
452 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
453 | |
454 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
455 callee_locals = array->element(index)->method()->max_locals(); | |
456 popframe_extra_args = 0; | |
457 } | |
458 | |
459 // Compute whether the root vframe returns a float or double value. | |
460 BasicType return_type; | |
461 { | |
462 HandleMark hm; | |
463 methodHandle method(thread, array->element(0)->method()); | |
2142 | 464 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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465 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
0 | 466 } |
467 | |
468 // Compute information for handling adapters and adjusting the frame size of the caller. | |
469 int caller_adjustment = 0; | |
470 | |
471 // Compute the amount the oldest interpreter frame will have to adjust | |
472 // its caller's stack by. If the caller is a compiled frame then | |
473 // we pretend that the callee has no parameters so that the | |
474 // extension counts for the full amount of locals and not just | |
475 // locals-parms. This is because without a c2i adapter the parm | |
476 // area as created by the compiled frame will not be usable by | |
477 // the interpreter. (Depending on the calling convention there | |
478 // may not even be enough space). | |
479 | |
480 // QQQ I'd rather see this pushed down into last_frame_adjust | |
481 // and have it take the sender (aka caller). | |
482 | |
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483 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
0 | 484 caller_adjustment = last_frame_adjust(0, callee_locals); |
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485 } else if (callee_locals > callee_parameters) { |
0 | 486 // The caller frame may need extending to accommodate |
487 // non-parameter locals of the first unpacked interpreted frame. | |
488 // Compute that adjustment. | |
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489 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
0 | 490 } |
491 | |
492 // If the sender is deoptimized the we must retrieve the address of the handler | |
493 // since the frame will "magically" show the original pc before the deopt | |
494 // and we'd undo the deopt. | |
495 | |
496 frame_pcs[0] = deopt_sender.raw_pc(); | |
497 | |
1692 | 498 #ifndef SHARK |
0 | 499 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
1692 | 500 #endif // SHARK |
0 | 501 |
502 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, | |
503 caller_adjustment * BytesPerWord, | |
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504 caller_was_method_handle ? 0 : callee_parameters, |
0 | 505 number_of_frames, |
506 frame_sizes, | |
507 frame_pcs, | |
508 return_type); | |
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509 // On some platforms, we need a way to pass some platform dependent |
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510 // information to the unpacking code so the skeletal frames come out |
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511 // correct (initial fp value, unextended sp, ...) |
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512 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
0 | 513 |
514 if (array->frames() > 1) { | |
515 if (VerifyStack && TraceDeoptimization) { | |
6843 | 516 ttyLocker ttyl; |
0 | 517 tty->print_cr("Deoptimizing method containing inlining"); |
518 } | |
519 } | |
520 | |
521 array->set_unroll_block(info); | |
522 return info; | |
523 } | |
524 | |
525 // Called to cleanup deoptimization data structures in normal case | |
526 // after unpacking to stack and when stack overflow error occurs | |
527 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
528 vframeArray *array) { | |
529 | |
530 // Get array if coming from exception | |
531 if (array == NULL) { | |
532 array = thread->vframe_array_head(); | |
533 } | |
534 thread->set_vframe_array_head(NULL); | |
535 | |
536 // Free the previous UnrollBlock | |
537 vframeArray* old_array = thread->vframe_array_last(); | |
538 thread->set_vframe_array_last(array); | |
539 | |
540 if (old_array != NULL) { | |
541 UnrollBlock* old_info = old_array->unroll_block(); | |
542 old_array->set_unroll_block(NULL); | |
543 delete old_info; | |
544 delete old_array; | |
545 } | |
546 | |
547 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
548 // inside the vframeArray (StackValueCollections) | |
549 | |
550 delete thread->deopt_mark(); | |
551 thread->set_deopt_mark(NULL); | |
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iveresov
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552 thread->set_deopt_nmethod(NULL); |
0 | 553 |
554 | |
555 if (JvmtiExport::can_pop_frame()) { | |
556 #ifndef CC_INTERP | |
557 // Regardless of whether we entered this routine with the pending | |
558 // popframe condition bit set, we should always clear it now | |
559 thread->clear_popframe_condition(); | |
560 #else | |
14909 | 561 // C++ interpeter will clear has_pending_popframe when it enters |
0 | 562 // with method_resume. For deopt_resume2 we clear it now. |
563 if (thread->popframe_forcing_deopt_reexecution()) | |
564 thread->clear_popframe_condition(); | |
565 #endif /* CC_INTERP */ | |
566 } | |
567 | |
568 // unpack_frames() is called at the end of the deoptimization handler | |
569 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
570 // so that an asynchronous stack walker can work again. This counter is | |
571 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
572 // the beginning of uncommon_trap(). | |
573 thread->dec_in_deopt_handler(); | |
574 } | |
575 | |
576 | |
577 // Return BasicType of value being returned | |
578 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
579 | |
580 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
581 // allocate will be freed at the end of the routine. | |
582 | |
583 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
584 // but makes the entry a little slower. There is however a little dance we have to | |
585 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
586 ResetNoHandleMark rnhm; // No-op in release/product versions | |
587 HandleMark hm; | |
588 | |
589 frame stub_frame = thread->last_frame(); | |
590 | |
591 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
592 // must point to the vframeArray for the unpack frame. | |
593 vframeArray* array = thread->vframe_array_head(); | |
594 | |
595 #ifndef PRODUCT | |
596 if (TraceDeoptimization) { | |
6843 | 597 ttyLocker ttyl; |
0 | 598 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
599 } | |
600 #endif | |
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601 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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602 stub_frame.pc(), stub_frame.sp(), exec_mode); |
0 | 603 |
604 UnrollBlock* info = array->unroll_block(); | |
605 | |
606 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
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607 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
0 | 608 |
609 BasicType bt = info->return_type(); | |
610 | |
611 // If we have an exception pending, claim that the return type is an oop | |
612 // so the deopt_blob does not overwrite the exception_oop. | |
613 | |
614 if (exec_mode == Unpack_exception) | |
615 bt = T_OBJECT; | |
616 | |
617 // Cleanup thread deopt data | |
618 cleanup_deopt_info(thread, array); | |
619 | |
620 #ifndef PRODUCT | |
621 if (VerifyStack) { | |
622 ResourceMark res_mark; | |
623 | |
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624 thread->validate_frame_layout(); |
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625 |
0 | 626 // Verify that the just-unpacked frames match the interpreter's |
627 // notions of expression stack and locals | |
628 vframeArray* cur_array = thread->vframe_array_last(); | |
629 RegisterMap rm(thread, false); | |
630 rm.set_include_argument_oops(false); | |
631 bool is_top_frame = true; | |
632 int callee_size_of_parameters = 0; | |
633 int callee_max_locals = 0; | |
634 for (int i = 0; i < cur_array->frames(); i++) { | |
635 vframeArrayElement* el = cur_array->element(i); | |
636 frame* iframe = el->iframe(); | |
637 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
638 | |
639 // Get the oop map for this bci | |
640 InterpreterOopMap mask; | |
641 int cur_invoke_parameter_size = 0; | |
642 bool try_next_mask = false; | |
643 int next_mask_expression_stack_size = -1; | |
644 int top_frame_expression_stack_adjustment = 0; | |
645 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
646 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
647 BytecodeStream str(mh); | |
648 str.set_start(iframe->interpreter_frame_bci()); | |
649 int max_bci = mh->code_size(); | |
650 // Get to the next bytecode if possible | |
651 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
652 // Check to see if we can grab the number of outgoing arguments | |
653 // at an uncommon trap for an invoke (where the compiler | |
654 // generates debug info before the invoke has executed) | |
655 Bytecodes::Code cur_code = str.next(); | |
10390 | 656 if (cur_code == Bytecodes::_invokevirtual || |
657 cur_code == Bytecodes::_invokespecial || | |
658 cur_code == Bytecodes::_invokestatic || | |
659 cur_code == Bytecodes::_invokeinterface || | |
660 cur_code == Bytecodes::_invokedynamic) { | |
2142 | 661 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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662 Symbol* signature = invoke.signature(); |
0 | 663 ArgumentSizeComputer asc(signature); |
664 cur_invoke_parameter_size = asc.size(); | |
10390 | 665 if (invoke.has_receiver()) { |
0 | 666 // Add in receiver |
667 ++cur_invoke_parameter_size; | |
668 } | |
10390 | 669 if (i != 0 && !invoke.is_invokedynamic() && MethodHandles::has_member_arg(invoke.klass(), invoke.name())) { |
670 callee_size_of_parameters++; | |
671 } | |
0 | 672 } |
673 if (str.bci() < max_bci) { | |
674 Bytecodes::Code bc = str.next(); | |
675 if (bc >= 0) { | |
676 // The interpreter oop map generator reports results before | |
677 // the current bytecode has executed except in the case of | |
678 // calls. It seems to be hard to tell whether the compiler | |
679 // has emitted debug information matching the "state before" | |
680 // a given bytecode or the state after, so we try both | |
681 switch (cur_code) { | |
682 case Bytecodes::_invokevirtual: | |
683 case Bytecodes::_invokespecial: | |
684 case Bytecodes::_invokestatic: | |
685 case Bytecodes::_invokeinterface: | |
10390 | 686 case Bytecodes::_invokedynamic: |
0 | 687 case Bytecodes::_athrow: |
688 break; | |
689 default: { | |
690 InterpreterOopMap next_mask; | |
691 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
692 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
693 // Need to subtract off the size of the result type of | |
694 // the bytecode because this is not described in the | |
695 // debug info but returned to the interpreter in the TOS | |
696 // caching register | |
697 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
698 if (bytecode_result_type != T_ILLEGAL) { | |
699 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
700 } | |
701 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
702 try_next_mask = true; | |
703 break; | |
704 } | |
705 } | |
706 } | |
707 } | |
708 | |
709 // Verify stack depth and oops in frame | |
710 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
711 if (!( | |
712 /* SPARC */ | |
713 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
714 /* x86 */ | |
715 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
716 (try_next_mask && | |
717 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
718 top_frame_expression_stack_adjustment))) || | |
719 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
720 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute) && | |
721 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) | |
722 )) { | |
723 ttyLocker ttyl; | |
724 | |
725 // Print out some information that will help us debug the problem | |
726 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
727 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
728 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
729 iframe->interpreter_frame_expression_stack_size()); | |
730 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
731 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
732 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
733 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
734 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
735 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
736 tty->print_cr(" exec_mode = %d", exec_mode); | |
737 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
738 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
739 tty->print_cr(" Interpreted frames:"); | |
740 for (int k = 0; k < cur_array->frames(); k++) { | |
741 vframeArrayElement* el = cur_array->element(k); | |
742 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
743 } | |
744 cur_array->print_on_2(tty); | |
745 guarantee(false, "wrong number of expression stack elements during deopt"); | |
746 } | |
747 VerifyOopClosure verify; | |
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stefank
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diff
changeset
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748 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
0 | 749 callee_size_of_parameters = mh->size_of_parameters(); |
750 callee_max_locals = mh->max_locals(); | |
751 is_top_frame = false; | |
752 } | |
753 } | |
754 #endif /* !PRODUCT */ | |
755 | |
756 | |
757 return bt; | |
758 JRT_END | |
759 | |
760 | |
761 int Deoptimization::deoptimize_dependents() { | |
762 Threads::deoptimized_wrt_marked_nmethods(); | |
763 return 0; | |
764 } | |
765 | |
766 | |
4978
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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767 #if defined(COMPILER2) || defined(GRAAL) |
0 | 768 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
769 Handle pending_exception(thread->pending_exception()); | |
770 const char* exception_file = thread->exception_file(); | |
771 int exception_line = thread->exception_line(); | |
772 thread->clear_pending_exception(); | |
773 | |
774 for (int i = 0; i < objects->length(); i++) { | |
775 assert(objects->at(i)->is_object(), "invalid debug information"); | |
776 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
777 | |
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778 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 779 oop obj = NULL; |
780 | |
781 if (k->oop_is_instance()) { | |
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782 InstanceKlass* ik = InstanceKlass::cast(k()); |
0 | 783 obj = ik->allocate_instance(CHECK_(false)); |
784 } else if (k->oop_is_typeArray()) { | |
6831
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785 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 786 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
787 int len = sv->field_size() / type2size[ak->element_type()]; | |
788 obj = ak->allocate(len, CHECK_(false)); | |
789 } else if (k->oop_is_objArray()) { | |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
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diff
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790 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
0 | 791 obj = ak->allocate(sv->field_size(), CHECK_(false)); |
792 } | |
793 | |
794 assert(obj != NULL, "allocation failed"); | |
795 assert(sv->value().is_null(), "redundant reallocation"); | |
796 sv->set_value(obj); | |
797 } | |
798 | |
799 if (pending_exception.not_null()) { | |
800 thread->set_pending_exception(pending_exception(), exception_file, exception_line); | |
801 } | |
802 | |
803 return true; | |
804 } | |
805 | |
806 // restore elements of an eliminated type array | |
807 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
808 int index = 0; | |
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809 intptr_t val; |
0 | 810 |
811 for (int i = 0; i < sv->field_size(); i++) { | |
812 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
813 switch(type) { | |
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6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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814 case T_LONG: case T_DOUBLE: { |
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6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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815 assert(value->type() == T_INT, "Agreement."); |
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816 StackValue* low = |
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6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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817 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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818 #ifdef _LP64 |
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819 jlong res = (jlong)low->get_int(); |
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820 #else |
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821 #ifdef SPARC |
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822 // For SPARC we have to swap high and low words. |
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changeset
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823 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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824 #else |
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825 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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826 #endif //SPARC |
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827 #endif |
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828 obj->long_at_put(index, res); |
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diff
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829 break; |
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|
830 } |
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831 |
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changeset
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832 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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833 case T_INT: case T_FLOAT: // 4 bytes. |
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834 assert(value->type() == T_INT, "Agreement."); |
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835 val = value->get_int(); |
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|
836 obj->int_at_put(index, (jint)*((jint*)&val)); |
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837 break; |
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|
838 |
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839 case T_SHORT: case T_CHAR: // 2 bytes |
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840 assert(value->type() == T_INT, "Agreement."); |
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841 val = value->get_int(); |
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842 obj->short_at_put(index, (jshort)*((jint*)&val)); |
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843 break; |
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changeset
|
844 |
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changeset
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845 case T_BOOLEAN: case T_BYTE: // 1 byte |
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changeset
|
846 assert(value->type() == T_INT, "Agreement."); |
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changeset
|
847 val = value->get_int(); |
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parents:
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changeset
|
848 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
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6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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parents:
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diff
changeset
|
849 break; |
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parents:
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diff
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|
850 |
0 | 851 default: |
852 ShouldNotReachHere(); | |
853 } | |
854 index++; | |
855 } | |
856 } | |
857 | |
858 | |
859 // restore fields of an eliminated object array | |
860 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
861 for (int i = 0; i < sv->field_size(); i++) { | |
862 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
863 assert(value->type() == T_OBJECT, "object element expected"); | |
864 obj->obj_at_put(i, value->get_obj()()); | |
865 } | |
866 } | |
867 | |
7222 | 868 class ReassignedField { |
869 public: | |
870 int _offset; | |
871 BasicType _type; | |
872 public: | |
873 ReassignedField() { | |
874 _offset = 0; | |
875 _type = T_ILLEGAL; | |
876 } | |
877 }; | |
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878 |
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879 int compare(ReassignedField* left, ReassignedField* right) { |
7222 | 880 return left->_offset - right->_offset; |
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881 } |
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882 |
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883 // Restore fields of an eliminated instance object using the same field order |
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884 // returned by HotSpotResolvedObjectType.getInstanceFields(true) |
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885 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj) { |
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886 if (klass->superklass() != NULL) { |
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887 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj); |
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888 } |
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889 |
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890 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
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891 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
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892 if (!fs.access_flags().is_static()) { |
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893 ReassignedField field; |
7222 | 894 field._offset = fs.offset(); |
895 field._type = FieldType::basic_type(fs.signature()); | |
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896 fields->append(field); |
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897 } |
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898 } |
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899 fields->sort(compare); |
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900 for (int i = 0; i < fields->length(); i++) { |
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901 intptr_t val; |
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902 ScopeValue* scope_field = sv->field_at(svIndex); |
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903 StackValue* value = StackValue::create_stack_value(fr, reg_map, scope_field); |
7222 | 904 int offset = fields->at(i)._offset; |
905 BasicType type = fields->at(i)._type; | |
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906 switch (type) { |
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907 case T_OBJECT: case T_ARRAY: |
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908 assert(value->type() == T_OBJECT, "Agreement."); |
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909 obj->obj_field_put(offset, value->get_obj()()); |
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910 break; |
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911 |
12617
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912 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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913 case T_INT: case T_FLOAT: { // 4 bytes. |
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914 assert(value->type() == T_INT, "Agreement."); |
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915 bool big_value = false; |
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916 if (i+1 < fields->length() && fields->at(i+1)._type == T_INT) { |
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917 if (scope_field->is_location()) { |
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918 Location::Type type = ((LocationValue*) scope_field)->location().type(); |
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919 if (type == Location::dbl || type == Location::lng) { |
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920 big_value = true; |
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921 } |
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922 } |
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923 if (scope_field->is_constant_int()) { |
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924 ScopeValue* next_scope_field = sv->field_at(svIndex + 1); |
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925 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
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926 big_value = true; |
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927 } |
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928 } |
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929 } |
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930 |
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931 if (big_value) { |
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932 i++; |
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|
933 assert(i < fields->length(), "second T_INT field needed"); |
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934 assert(fields->at(i)._type == T_INT, "T_INT field needed"); |
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935 } else { |
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936 val = value->get_int(); |
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|
937 obj->int_field_put(offset, (jint)*((jint*)&val)); |
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|
938 break; |
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939 } |
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940 } |
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|
941 /* no break */ |
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942 |
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|
943 case T_LONG: case T_DOUBLE: { |
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944 assert(value->type() == T_INT, "Agreement."); |
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945 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
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|
946 #ifdef _LP64 |
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|
947 jlong res = (jlong)low->get_int(); |
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|
948 #else |
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|
949 #ifdef SPARC |
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950 // For SPARC we have to swap high and low words. |
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|
951 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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|
952 #else |
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953 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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|
954 #endif //SPARC |
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|
955 #endif |
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956 obj->long_field_put(offset, res); |
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957 break; |
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958 } |
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959 |
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|
960 case T_SHORT: case T_CHAR: // 2 bytes |
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|
961 assert(value->type() == T_INT, "Agreement."); |
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|
962 val = value->get_int(); |
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963 obj->short_field_put(offset, (jshort)*((jint*)&val)); |
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964 break; |
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|
965 |
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|
966 case T_BOOLEAN: case T_BYTE: // 1 byte |
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967 assert(value->type() == T_INT, "Agreement."); |
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|
968 val = value->get_int(); |
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969 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
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970 break; |
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971 |
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|
972 default: |
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|
973 ShouldNotReachHere(); |
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974 } |
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|
975 svIndex++; |
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976 } |
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|
977 return svIndex; |
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978 } |
0 | 979 |
980 // restore fields of all eliminated objects and arrays | |
981 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects) { | |
982 for (int i = 0; i < objects->length(); i++) { | |
983 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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984 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 985 Handle obj = sv->value(); |
986 assert(obj.not_null(), "reallocation was missed"); | |
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987 if (PrintDeoptimizationDetails) { |
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988 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
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989 } |
0 | 990 |
991 if (k->oop_is_instance()) { | |
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992 InstanceKlass* ik = InstanceKlass::cast(k()); |
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993 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj()); |
0 | 994 } else if (k->oop_is_typeArray()) { |
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995 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 996 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
997 } else if (k->oop_is_objArray()) { | |
998 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
999 } | |
1000 } | |
1001 } | |
1002 | |
1003 | |
1004 // relock objects for which synchronization was eliminated | |
83
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1005 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread) { |
0 | 1006 for (int i = 0; i < monitors->length(); i++) { |
83
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1007 MonitorInfo* mon_info = monitors->at(i); |
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1008 if (mon_info->eliminated()) { |
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1009 assert(mon_info->owner() != NULL, "reallocation was missed"); |
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1010 Handle obj = Handle(mon_info->owner()); |
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1011 markOop mark = obj->mark(); |
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1012 if (UseBiasedLocking && mark->has_bias_pattern()) { |
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1013 // New allocated objects may have the mark set to anonymously biased. |
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1014 // Also the deoptimized method may called methods with synchronization |
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1015 // where the thread-local object is bias locked to the current thread. |
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1016 assert(mark->is_biased_anonymously() || |
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1017 mark->biased_locker() == thread, "should be locked to current thread"); |
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1018 // Reset mark word to unbiased prototype. |
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1019 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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1020 obj->set_mark(unbiased_prototype); |
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1021 } |
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1022 BasicLock* lock = mon_info->lock(); |
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1023 ObjectSynchronizer::slow_enter(obj, lock, thread); |
0 | 1024 } |
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1025 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
0 | 1026 } |
1027 } | |
1028 | |
1029 | |
1030 #ifndef PRODUCT | |
1031 // print information about reallocated objects | |
1032 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects) { | |
1033 fieldDescriptor fd; | |
1034 | |
1035 for (int i = 0; i < objects->length(); i++) { | |
1036 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1037 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 1038 Handle obj = sv->value(); |
1039 | |
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1040 tty->print(" object <" INTPTR_FORMAT "> of type ", (void *)sv->value()()); |
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1041 k->print_value(); |
0 | 1042 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
1043 tty->cr(); | |
1044 | |
1045 if (Verbose) { | |
1046 k->oop_print_on(obj(), tty); | |
1047 } | |
1048 } | |
1049 } | |
1050 #endif | |
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1051 #endif // COMPILER2 || GRAAL |
0 | 1052 |
1053 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk) { | |
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1054 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
0 | 1055 |
1056 #ifndef PRODUCT | |
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1057 if (PrintDeoptimizationDetails) { |
0 | 1058 ttyLocker ttyl; |
1059 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
1060 fr.print_on(tty); | |
1061 tty->print_cr(" Virtual frames (innermost first):"); | |
1062 for (int index = 0; index < chunk->length(); index++) { | |
1063 compiledVFrame* vf = chunk->at(index); | |
1064 tty->print(" %2d - ", index); | |
1065 vf->print_value(); | |
1066 int bci = chunk->at(index)->raw_bci(); | |
1067 const char* code_name; | |
1068 if (bci == SynchronizationEntryBCI) { | |
1069 code_name = "sync entry"; | |
1070 } else { | |
2142 | 1071 Bytecodes::Code code = vf->method()->code_at(bci); |
0 | 1072 code_name = Bytecodes::name(code); |
1073 } | |
1074 tty->print(" - %s", code_name); | |
1075 tty->print_cr(" @ bci %d ", bci); | |
1076 if (Verbose) { | |
1077 vf->print(); | |
1078 tty->cr(); | |
1079 } | |
1080 } | |
1081 } | |
1082 #endif | |
1083 | |
1084 // Register map for next frame (used for stack crawl). We capture | |
1085 // the state of the deopt'ing frame's caller. Thus if we need to | |
1086 // stuff a C2I adapter we can properly fill in the callee-save | |
1087 // register locations. | |
1088 frame caller = fr.sender(reg_map); | |
1089 int frame_size = caller.sp() - fr.sp(); | |
1090 | |
1091 frame sender = caller; | |
1092 | |
1093 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
1094 // the vframeArray containing the unpacking information is allocated in the C heap. | |
1095 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
1096 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr); | |
1097 | |
1098 // Compare the vframeArray to the collected vframes | |
1099 assert(array->structural_compare(thread, chunk), "just checking"); | |
1100 | |
1101 #ifndef PRODUCT | |
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1102 if (PrintDeoptimizationDetails) { |
0 | 1103 ttyLocker ttyl; |
1104 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
1105 } | |
1106 #endif // PRODUCT | |
1107 | |
1108 return array; | |
1109 } | |
1110 | |
1111 | |
1112 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
1113 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
1114 for (int i = 0; i < monitors->length(); i++) { | |
1115 MonitorInfo* mon_info = monitors->at(i); | |
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1116 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
0 | 1117 objects_to_revoke->append(Handle(mon_info->owner())); |
1118 } | |
1119 } | |
1120 } | |
1121 | |
1122 | |
1123 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
1124 if (!UseBiasedLocking) { | |
1125 return; | |
1126 } | |
1127 | |
1128 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1129 | |
1130 // Unfortunately we don't have a RegisterMap available in most of | |
1131 // the places we want to call this routine so we need to walk the | |
1132 // stack again to update the register map. | |
1133 if (map == NULL || !map->update_map()) { | |
1134 StackFrameStream sfs(thread, true); | |
1135 bool found = false; | |
1136 while (!found && !sfs.is_done()) { | |
1137 frame* cur = sfs.current(); | |
1138 sfs.next(); | |
1139 found = cur->id() == fr.id(); | |
1140 } | |
1141 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
1142 map = sfs.register_map(); | |
1143 } | |
1144 | |
1145 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
1146 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1147 // Revoke monitors' biases in all scopes | |
1148 while (!cvf->is_top()) { | |
1149 collect_monitors(cvf, objects_to_revoke); | |
1150 cvf = compiledVFrame::cast(cvf->sender()); | |
1151 } | |
1152 collect_monitors(cvf, objects_to_revoke); | |
1153 | |
1154 if (SafepointSynchronize::is_at_safepoint()) { | |
1155 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1156 } else { | |
1157 BiasedLocking::revoke(objects_to_revoke); | |
1158 } | |
1159 } | |
1160 | |
1161 | |
1162 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
1163 if (!UseBiasedLocking) { | |
1164 return; | |
1165 } | |
1166 | |
1167 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
1168 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1169 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
1170 if (jt->has_last_Java_frame()) { | |
1171 StackFrameStream sfs(jt, true); | |
1172 while (!sfs.is_done()) { | |
1173 frame* cur = sfs.current(); | |
1174 if (cb->contains(cur->pc())) { | |
1175 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
1176 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1177 // Revoke monitors' biases in all scopes | |
1178 while (!cvf->is_top()) { | |
1179 collect_monitors(cvf, objects_to_revoke); | |
1180 cvf = compiledVFrame::cast(cvf->sender()); | |
1181 } | |
1182 collect_monitors(cvf, objects_to_revoke); | |
1183 } | |
1184 sfs.next(); | |
1185 } | |
1186 } | |
1187 } | |
1188 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1189 } | |
1190 | |
1191 | |
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1192 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
0 | 1193 assert(fr.can_be_deoptimized(), "checking frame type"); |
1194 | |
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1195 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
0 | 1196 |
1197 // Patch the nmethod so that when execution returns to it we will | |
1198 // deopt the execution state and return to the interpreter. | |
1199 fr.deoptimize(thread); | |
1200 } | |
1201 | |
1202 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map) { | |
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1203 deoptimize(thread, fr, map, Reason_constraint); |
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1204 } |
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1205 |
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1206 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
0 | 1207 // Deoptimize only if the frame comes from compile code. |
1208 // Do not deoptimize the frame which is already patched | |
1209 // during the execution of the loops below. | |
1210 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
1211 return; | |
1212 } | |
1213 ResourceMark rm; | |
1214 DeoptimizationMarker dm; | |
1215 if (UseBiasedLocking) { | |
1216 revoke_biases_of_monitors(thread, fr, map); | |
1217 } | |
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1218 deoptimize_single_frame(thread, fr, reason); |
0 | 1219 |
1220 } | |
1221 | |
1222 | |
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1223 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1224 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
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1225 "can only deoptimize other thread at a safepoint"); |
0 | 1226 // Compute frame and register map based on thread and sp. |
1227 RegisterMap reg_map(thread, UseBiasedLocking); | |
1228 frame fr = thread->last_frame(); | |
1229 while (fr.id() != id) { | |
1230 fr = fr.sender(®_map); | |
1231 } | |
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1232 deoptimize(thread, fr, ®_map, reason); |
0 | 1233 } |
1234 | |
1235 | |
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1236 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1237 if (thread == Thread::current()) { |
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1238 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
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1239 } else { |
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1240 VM_DeoptimizeFrame deopt(thread, id, reason); |
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1241 VMThread::execute(&deopt); |
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1242 } |
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1243 } |
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1244 |
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1245 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id) { |
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1246 deoptimize_frame(thread, id, Reason_constraint); |
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1247 } |
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1248 |
0 | 1249 // JVMTI PopFrame support |
1250 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
1251 { | |
1252 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
1253 } | |
1254 JRT_END | |
1255 | |
1256 | |
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1257 #if defined(COMPILER2) || defined(SHARK) || defined(GRAAL) |
0 | 1258 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
1259 // in case of an unresolved klass entry, load the class. | |
1260 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
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1261 Klass* tk = constant_pool->klass_at(index, CHECK); |
0 | 1262 return; |
1263 } | |
1264 | |
1265 if (!constant_pool->tag_at(index).is_symbol()) return; | |
1266 | |
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1267 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
|
1268 Symbol* symbol = constant_pool->symbol_at(index); |
0 | 1269 |
1270 // class name? | |
1271 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
|
1272 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1273 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
1274 return; | |
1275 } | |
1276 | |
1277 // then it must be a signature! | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1278 ResourceMark rm(THREAD); |
0 | 1279 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
1280 if (ss.is_object()) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1281 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
|
1282 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1283 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
1284 } | |
1285 } | |
1286 } | |
1287 | |
1288 | |
1289 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
1290 EXCEPTION_MARK; | |
1291 load_class_by_index(constant_pool, index, THREAD); | |
1292 if (HAS_PENDING_EXCEPTION) { | |
1293 // Exception happened during classloading. We ignore the exception here, since it | |
14909 | 1294 // is going to be rethrown since the current activation is going to be deoptimzied and |
0 | 1295 // the interpreter will re-execute the bytecode. |
1296 CLEAR_PENDING_EXCEPTION; | |
1297 } | |
1298 } | |
1299 | |
1300 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
1301 HandleMark hm; | |
1302 | |
1303 // uncommon_trap() is called at the beginning of the uncommon trap | |
1304 // handler. Note this fact before we start generating temporary frames | |
1305 // that can confuse an asynchronous stack walker. This counter is | |
1306 // decremented at the end of unpack_frames(). | |
1307 thread->inc_in_deopt_handler(); | |
1308 | |
1309 // 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
|
1310 #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
|
1311 // (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
|
1312 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
|
1313 #else |
0 | 1314 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
|
1315 #endif |
0 | 1316 frame stub_frame = thread->last_frame(); |
1317 frame fr = stub_frame.sender(®_map); | |
1318 // Make sure the calling nmethod is not getting deoptimized and removed | |
1319 // before we are done with it. | |
1320 nmethodLocker nl(fr.pc()); | |
1321 | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4777
diff
changeset
|
1322 // 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
|
1323 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
|
1324 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
|
1325 |
0 | 1326 { |
1327 ResourceMark rm; | |
1328 | |
1329 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
1330 revoke_biases_of_monitors(thread, fr, ®_map); | |
1331 | |
1332 DeoptReason reason = trap_request_reason(trap_request); | |
1333 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
|
1334 #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
|
1335 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
|
1336 #endif |
0 | 1337 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 |
1338 | |
1339 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
1340 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1341 | |
1342 nmethod* nm = cvf->code(); | |
1343 | |
1344 ScopeDesc* trap_scope = cvf->scope(); | |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1345 |
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1346 if (TraceDeoptimization) { |
13768
a7cb9f383ec4
print name and sig in TraceDeoptimization output
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
13713
diff
changeset
|
1347 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
|
1348 #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
|
1349 , debug_id |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1350 #endif |
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1351 ); |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1352 } |
0 | 1353 |
1354 methodHandle trap_method = trap_scope->method(); | |
1355 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
|
1356 #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
|
1357 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
|
1358 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
|
1359 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
|
1360 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
|
1361 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
|
1362 if (TraceDeoptimization || TraceUncollectedSpeculations) { |
13642
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1363 if (SpeculationLog::lastFailed(speculation_log) != NULL) { |
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1364 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
|
1365 } |
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1366 } |
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
|
1367 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
|
1368 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
|
1369 } |
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 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
|
1371 } 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
|
1372 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
|
1373 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
|
1374 } |
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
|
1375 } |
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
|
1376 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
|
1377 } 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
|
1378 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
|
1379 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
|
1380 } |
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
|
1381 } |
13713
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1382 } else { |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1383 #ifdef ASSERT |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1384 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
|
1385 #endif |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1386 } |
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
|
1387 |
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1388 if (trap_bci == SynchronizationEntryBCI) { |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1389 trap_bci = 0; |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1390 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
|
1391 } |
13220
2b43fcc68add
Put _pending_deoptimization and _pending_monitorenter under ifdef GRAAL
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13216
diff
changeset
|
1392 #endif |
2142 | 1393 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
0 | 1394 |
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
|
1395 if (trap_scope->rethrow_exception()) { |
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
1396 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
|
1397 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
|
1398 } |
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
|
1399 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
|
1400 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
|
1401 ScopeValue* topOfStack = expressions->top(); |
8151
b8f261ba79c6
Minimize diff to plain HotSpot version.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8124
diff
changeset
|
1402 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
|
1403 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
|
1404 } |
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
|
1405 |
0 | 1406 // Record this event in the histogram. |
1407 gather_statistics(reason, action, trap_bc); | |
1408 | |
1409 // Ensure that we can record deopt. history: | |
1410 bool create_if_missing = ProfileTraps; | |
1411 | |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1412 methodHandle profiled_method; |
9571
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1413 #ifdef GRAAL |
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1414 if (nm->is_compiled_by_graal()) { |
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1415 profiled_method = nm->method(); |
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1416 } else { |
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1417 profiled_method = trap_method; |
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1418 } |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1419 #else |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1420 profiled_method = trap_method; |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1421 #endif |
314814fa0223
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1422 |
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1423 MethodData* trap_mdo = |
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1424 get_method_data(thread, profiled_method, create_if_missing); |
0 | 1425 |
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1426 // Log a message |
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1427 Events::log_deopt_message(thread, "Uncommon trap: reason=%s action=%s pc=" INTPTR_FORMAT " method=%s @ %d", |
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1428 trap_reason_name(reason), trap_action_name(action), fr.pc(), |
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1429 trap_method->name_and_sig_as_C_string(), trap_bci); |
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1430 |
0 | 1431 // Print a bunch of diagnostics, if requested. |
1432 if (TraceDeoptimization || LogCompilation) { | |
1433 ResourceMark rm; | |
1434 ttyLocker ttyl; | |
1435 char buf[100]; | |
1436 if (xtty != NULL) { | |
1437 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
1438 os::current_thread_id(), | |
1439 format_trap_request(buf, sizeof(buf), trap_request)); | |
1440 nm->log_identity(xtty); | |
1441 } | |
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1442 Symbol* class_name = NULL; |
0 | 1443 bool unresolved = false; |
1444 if (unloaded_class_index >= 0) { | |
1445 constantPoolHandle constants (THREAD, trap_method->constants()); | |
1446 if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) { | |
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1447 class_name = constants->klass_name_at(unloaded_class_index); |
0 | 1448 unresolved = true; |
1449 if (xtty != NULL) | |
1450 xtty->print(" unresolved='1'"); | |
1451 } else if (constants->tag_at(unloaded_class_index).is_symbol()) { | |
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1452 class_name = constants->symbol_at(unloaded_class_index); |
0 | 1453 } |
1454 if (xtty != NULL) | |
1455 xtty->name(class_name); | |
1456 } | |
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1457 if (xtty != NULL && trap_mdo != NULL) { |
0 | 1458 // Dump the relevant MDO state. |
1459 // This is the deopt count for the current reason, any previous | |
1460 // reasons or recompiles seen at this point. | |
1461 int dcnt = trap_mdo->trap_count(reason); | |
1462 if (dcnt != 0) | |
1463 xtty->print(" count='%d'", dcnt); | |
1464 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
1465 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
1466 if (dos != 0) { | |
1467 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
1468 if (trap_state_is_recompiled(dos)) { | |
1469 int recnt2 = trap_mdo->overflow_recompile_count(); | |
1470 if (recnt2 != 0) | |
1471 xtty->print(" recompiles2='%d'", recnt2); | |
1472 } | |
1473 } | |
1474 } | |
1475 if (xtty != NULL) { | |
1476 xtty->stamp(); | |
1477 xtty->end_head(); | |
1478 } | |
1479 if (TraceDeoptimization) { // make noise on the tty | |
1480 tty->print("Uncommon trap occurred in"); | |
1481 nm->method()->print_short_name(tty); | |
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|
1482 #ifdef GRAAL |
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1483 oop installedCode = nm->graal_installed_code(); |
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1484 if (installedCode != NULL) { |
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|
1485 oop installedCodeName = HotSpotNmethod::name(installedCode); |
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1486 if (installedCodeName != NULL) { |
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|
1487 tty->print(" (Graal: installedCodeName=%s) ", java_lang_String::as_utf8_string(installedCodeName)); |
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Gilles Duboscq <duboscq@ssw.jku.at>
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diff
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|
1488 } else { |
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1489 tty->print(" (Graal: installed code has no name) "); |
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Gilles Duboscq <duboscq@ssw.jku.at>
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diff
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|
1490 } |
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
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|
1491 } else if (nm->is_compiled_by_graal()) { |
12517
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|
1492 tty->print(" (Graal: no installed code) "); |
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|
1493 } |
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1494 #endif //GRAAL |
13670
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Gilles Duboscq <duboscq@ssw.jku.at>
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diff
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|
1495 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d" GRAAL_ONLY(" debug_id=%d"), |
0 | 1496 fr.pc(), |
6843 | 1497 os::current_thread_id(), |
0 | 1498 trap_reason_name(reason), |
1499 trap_action_name(action), | |
12699
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Start passing down a 'speculation id' to deoptimizations.
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|
1500 unloaded_class_index |
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
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diff
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|
1501 #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>
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13220
diff
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|
1502 , debug_id |
12699
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Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
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|
1503 #endif |
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1504 ); |
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1505 if (class_name != NULL) { |
0 | 1506 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
1507 class_name->print_symbol_on(tty); | |
1508 } | |
1509 tty->cr(); | |
1510 } | |
1511 if (xtty != NULL) { | |
1512 // Log the precise location of the trap. | |
1513 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
1514 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
1515 xtty->method(sd->method()); | |
1516 xtty->end_elem(); | |
1517 if (sd->is_top()) break; | |
1518 } | |
1519 xtty->tail("uncommon_trap"); | |
1520 } | |
1521 } | |
1522 // (End diagnostic printout.) | |
1523 | |
1524 // Load class if necessary | |
1525 if (unloaded_class_index >= 0) { | |
1526 constantPoolHandle constants(THREAD, trap_method->constants()); | |
1527 load_class_by_index(constants, unloaded_class_index); | |
1528 } | |
1529 | |
1530 // Flush the nmethod if necessary and desirable. | |
1531 // | |
1532 // We need to avoid situations where we are re-flushing the nmethod | |
1533 // because of a hot deoptimization site. Repeated flushes at the same | |
1534 // point need to be detected by the compiler and avoided. If the compiler | |
1535 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
1536 // module must take measures to avoid an infinite cycle of recompilation | |
1537 // and deoptimization. There are several such measures: | |
1538 // | |
1539 // 1. If a recompilation is ordered a second time at some site X | |
1540 // and for the same reason R, the action is adjusted to 'reinterpret', | |
1541 // to give the interpreter time to exercise the method more thoroughly. | |
1542 // If this happens, the method's overflow_recompile_count is incremented. | |
1543 // | |
1544 // 2. If the compiler fails to reduce the deoptimization rate, then | |
1545 // the method's overflow_recompile_count will begin to exceed the set | |
1546 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
1547 // is adjusted to 'make_not_compilable', and the method is abandoned | |
1548 // to the interpreter. This is a performance hit for hot methods, | |
1549 // but is better than a disastrous infinite cycle of recompilations. | |
1550 // (Actually, only the method containing the site X is abandoned.) | |
1551 // | |
1552 // 3. In parallel with the previous measures, if the total number of | |
1553 // recompilations of a method exceeds the much larger set limit | |
1554 // PerMethodRecompilationCutoff, the method is abandoned. | |
1555 // This should only happen if the method is very large and has | |
1556 // many "lukewarm" deoptimizations. The code which enforces this | |
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1557 // limit is elsewhere (class nmethod, class Method). |
0 | 1558 // |
1559 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
1560 // to recompile at each bytecode independently of the per-BCI cutoff. | |
1561 // | |
1562 // The decision to update code is up to the compiler, and is encoded | |
1563 // in the Action_xxx code. If the compiler requests Action_none | |
1564 // no trap state is changed, no compiled code is changed, and the | |
1565 // computation suffers along in the interpreter. | |
1566 // | |
1567 // The other action codes specify various tactics for decompilation | |
1568 // and recompilation. Action_maybe_recompile is the loosest, and | |
1569 // allows the compiled code to stay around until enough traps are seen, | |
1570 // and until the compiler gets around to recompiling the trapping method. | |
1571 // | |
1572 // The other actions cause immediate removal of the present code. | |
1573 | |
1574 bool update_trap_state = true; | |
1575 bool make_not_entrant = false; | |
1576 bool make_not_compilable = false; | |
1783 | 1577 bool reprofile = false; |
0 | 1578 switch (action) { |
1579 case Action_none: | |
1580 // Keep the old code. | |
1581 update_trap_state = false; | |
1582 break; | |
1583 case Action_maybe_recompile: | |
1584 // Do not need to invalidate the present code, but we can | |
1585 // initiate another | |
1586 // Start compiler without (necessarily) invalidating the nmethod. | |
1587 // The system will tolerate the old code, but new code should be | |
1588 // generated when possible. | |
1589 break; | |
1590 case Action_reinterpret: | |
1591 // Go back into the interpreter for a while, and then consider | |
1592 // recompiling form scratch. | |
1593 make_not_entrant = true; | |
1594 // Reset invocation counter for outer most method. | |
1595 // This will allow the interpreter to exercise the bytecodes | |
1596 // for a while before recompiling. | |
1597 // By contrast, Action_make_not_entrant is immediate. | |
1598 // | |
1599 // Note that the compiler will track null_check, null_assert, | |
1600 // range_check, and class_check events and log them as if they | |
1601 // had been traps taken from compiled code. This will update | |
1602 // the MDO trap history so that the next compilation will | |
1603 // properly detect hot trap sites. | |
1783 | 1604 reprofile = true; |
0 | 1605 break; |
1606 case Action_make_not_entrant: | |
1607 // Request immediate recompilation, and get rid of the old code. | |
1608 // Make them not entrant, so next time they are called they get | |
1609 // recompiled. Unloaded classes are loaded now so recompile before next | |
1610 // time they are called. Same for uninitialized. The interpreter will | |
1611 // link the missing class, if any. | |
1612 make_not_entrant = true; | |
1613 break; | |
1614 case Action_make_not_compilable: | |
1615 // Give up on compiling this method at all. | |
1616 make_not_entrant = true; | |
1617 make_not_compilable = true; | |
1618 break; | |
1619 default: | |
1620 ShouldNotReachHere(); | |
1621 } | |
1622 | |
1623 // Setting +ProfileTraps fixes the following, on all platforms: | |
1624 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
1625 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
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1626 // recompile relies on a MethodData* to record heroic opt failures. |
0 | 1627 |
1628 // Whether the interpreter is producing MDO data or not, we also need | |
1629 // to use the MDO to detect hot deoptimization points and control | |
1630 // aggressive optimization. | |
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1631 bool inc_recompile_count = false; |
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1632 ProfileData* pdata = NULL; |
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1633 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
12356
359f7e70ae7f
Reduce HotSpot diff and fix previous merge
Gilles Duboscq <duboscq@ssw.jku.at>
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12355
diff
changeset
|
1634 assert(trap_mdo == get_method_data(thread, profiled_method, false), "sanity"); |
0 | 1635 uint this_trap_count = 0; |
1636 bool maybe_prior_trap = false; | |
1637 bool maybe_prior_recompile = false; | |
5114
dad1ac9dba7d
finished first implementation of disabling runtime feedback selectively based on deoptimization history
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1638 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
13216
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Profile deoptimizations of OSR methods separately.
Roland Schatz <roland.schatz@oracle.com>
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1639 #ifdef GRAAL |
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1640 nm->is_compiled_by_graal() && nm->is_osr_method(), |
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1641 #endif |
0 | 1642 //outputs: |
1643 this_trap_count, | |
1644 maybe_prior_trap, | |
1645 maybe_prior_recompile); | |
1646 // Because the interpreter also counts null, div0, range, and class | |
1647 // checks, these traps from compiled code are double-counted. | |
1648 // This is harmless; it just means that the PerXTrapLimit values | |
1649 // are in effect a little smaller than they look. | |
1650 | |
1651 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
1652 if (per_bc_reason != Reason_none) { | |
1653 // Now take action based on the partially known per-BCI history. | |
1654 if (maybe_prior_trap | |
1655 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
1656 // If there are too many traps at this BCI, force a recompile. | |
1657 // This will allow the compiler to see the limit overflow, and | |
1658 // take corrective action, if possible. The compiler generally | |
1659 // does not use the exact PerBytecodeTrapLimit value, but instead | |
1660 // changes its tactics if it sees any traps at all. This provides | |
1661 // a little hysteresis, delaying a recompile until a trap happens | |
1662 // several times. | |
1663 // | |
1664 // Actually, since there is only one bit of counter per BCI, | |
1665 // the possible per-BCI counts are {0,1,(per-method count)}. | |
1666 // This produces accurate results if in fact there is only | |
1667 // one hot trap site, but begins to get fuzzy if there are | |
1668 // many sites. For example, if there are ten sites each | |
1669 // trapping two or more times, they each get the blame for | |
1670 // all of their traps. | |
1671 make_not_entrant = true; | |
1672 } | |
1673 | |
1674 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
1675 if (make_not_entrant && maybe_prior_recompile) { | |
1676 // More than one recompile at this point. | |
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1677 inc_recompile_count = maybe_prior_trap; |
0 | 1678 } |
1679 } else { | |
1680 // For reasons which are not recorded per-bytecode, we simply | |
1681 // force recompiles unconditionally. | |
1682 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
1683 make_not_entrant = true; | |
1684 } | |
1685 | |
1686 // Go back to the compiler if there are too many traps in this method. | |
14909 | 1687 if (this_trap_count >= (uint)PerMethodTrapLimit) { |
0 | 1688 // If there are too many traps in this method, force a recompile. |
1689 // This will allow the compiler to see the limit overflow, and | |
1690 // take corrective action, if possible. | |
1691 // (This condition is an unlikely backstop only, because the | |
1692 // PerBytecodeTrapLimit is more likely to take effect first, | |
1693 // if it is applicable.) | |
1694 make_not_entrant = true; | |
1695 } | |
1696 | |
1697 // Here's more hysteresis: If there has been a recompile at | |
1698 // this trap point already, run the method in the interpreter | |
1699 // for a while to exercise it more thoroughly. | |
1700 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
1783 | 1701 reprofile = true; |
0 | 1702 } |
1703 | |
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1704 } |
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1705 |
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|
1706 // Take requested actions on the method: |
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|
1707 |
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|
1708 // Recompile |
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1709 if (make_not_entrant) { |
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1710 if (!nm->make_not_entrant()) { |
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|
1711 return; // the call did not change nmethod's state |
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|
1712 } |
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1713 |
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|
1714 if (pdata != NULL) { |
0 | 1715 // Record the recompilation event, if any. |
1716 int tstate0 = pdata->trap_state(); | |
1717 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
1718 if (tstate1 != tstate0) | |
1719 pdata->set_trap_state(tstate1); | |
1720 } | |
1721 } | |
1722 | |
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1723 if (inc_recompile_count) { |
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1724 trap_mdo->inc_overflow_recompile_count(); |
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1725 if ((uint)trap_mdo->overflow_recompile_count() > |
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1726 (uint)PerBytecodeRecompilationCutoff) { |
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1727 // Give up on the method containing the bad BCI. |
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1728 if (trap_method() == nm->method()) { |
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1729 make_not_compilable = true; |
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1730 } else { |
7998 | 1731 trap_method->set_not_compilable(CompLevel_full_optimization, true, "overflow_recompile_count > PerBytecodeRecompilationCutoff"); |
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1732 // But give grace to the enclosing nm->method(). |
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1733 } |
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1734 } |
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1735 } |
0 | 1736 |
1783 | 1737 // Reprofile |
1738 if (reprofile) { | |
1739 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
0 | 1740 } |
1741 | |
1742 // Give up compiling | |
1783 | 1743 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
0 | 1744 assert(make_not_entrant, "consistent"); |
1783 | 1745 nm->method()->set_not_compilable(CompLevel_full_optimization); |
0 | 1746 } |
1747 | |
1748 } // Free marked resources | |
1749 | |
1750 } | |
1751 JRT_END | |
1752 | |
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1753 MethodData* |
0 | 1754 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
1755 bool create_if_missing) { | |
1756 Thread* THREAD = thread; | |
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1757 MethodData* mdo = m()->method_data(); |
0 | 1758 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
1759 // Build an MDO. Ignore errors like OutOfMemory; | |
1760 // that simply means we won't have an MDO to update. | |
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1761 Method::build_interpreter_method_data(m, THREAD); |
0 | 1762 if (HAS_PENDING_EXCEPTION) { |
1763 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
1764 CLEAR_PENDING_EXCEPTION; | |
1765 } | |
1766 mdo = m()->method_data(); | |
1767 } | |
1768 return mdo; | |
1769 } | |
1770 | |
1771 ProfileData* | |
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1772 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
0 | 1773 int trap_bci, |
1774 Deoptimization::DeoptReason reason, | |
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1775 bool update_total_trap_count, |
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1776 #ifdef GRAAL |
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1777 bool is_osr, |
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1778 #endif |
0 | 1779 //outputs: |
1780 uint& ret_this_trap_count, | |
1781 bool& ret_maybe_prior_trap, | |
1782 bool& ret_maybe_prior_recompile) { | |
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1783 bool maybe_prior_trap = false; |
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1784 bool maybe_prior_recompile = false; |
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1785 uint this_trap_count = 0; |
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1786 if (update_total_trap_count) { |
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1787 uint idx = reason; |
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1788 #ifdef GRAAL |
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1789 if (is_osr) { |
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1790 idx += Reason_LIMIT; |
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1791 } |
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1792 #endif |
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1793 uint prior_trap_count = trap_mdo->trap_count(idx); |
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1794 this_trap_count = trap_mdo->inc_trap_count(idx); |
0 | 1795 |
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1796 // If the runtime cannot find a place to store trap history, |
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1797 // it is estimated based on the general condition of the method. |
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1798 // If the method has ever been recompiled, or has ever incurred |
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1799 // a trap with the present reason , then this BCI is assumed |
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1800 // (pessimistically) to be the culprit. |
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1801 maybe_prior_trap = (prior_trap_count != 0); |
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1802 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1803 } |
0 | 1804 ProfileData* pdata = NULL; |
1805 | |
1806 | |
1807 // For reasons which are recorded per bytecode, we check per-BCI data. | |
1808 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
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1809 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
0 | 1810 if (per_bc_reason != Reason_none) { |
1811 // Find the profile data for this BCI. If there isn't one, | |
1812 // try to allocate one from the MDO's set of spares. | |
1813 // This will let us detect a repeated trap at this point. | |
14909 | 1814 pdata = trap_mdo->allocate_bci_to_data(trap_bci); |
0 | 1815 |
1816 if (pdata != NULL) { | |
1817 // Query the trap state of this profile datum. | |
1818 int tstate0 = pdata->trap_state(); | |
1819 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
1820 maybe_prior_trap = false; | |
1821 if (!trap_state_is_recompiled(tstate0)) | |
1822 maybe_prior_recompile = false; | |
1823 | |
1824 // Update the trap state of this profile datum. | |
1825 int tstate1 = tstate0; | |
1826 // Record the reason. | |
1827 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
1828 // Store the updated state on the MDO, for next time. | |
1829 if (tstate1 != tstate0) | |
1830 pdata->set_trap_state(tstate1); | |
1831 } else { | |
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1832 if (LogCompilation && xtty != NULL) { |
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1833 ttyLocker ttyl; |
0 | 1834 // Missing MDP? Leave a small complaint in the log. |
1835 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1836 } |
0 | 1837 } |
1838 } | |
1839 | |
1840 // Return results: | |
1841 ret_this_trap_count = this_trap_count; | |
1842 ret_maybe_prior_trap = maybe_prior_trap; | |
1843 ret_maybe_prior_recompile = maybe_prior_recompile; | |
1844 return pdata; | |
1845 } | |
1846 | |
1847 void | |
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1848 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 1849 ResourceMark rm; |
1850 // Ignored outputs: | |
1851 uint ignore_this_trap_count; | |
1852 bool ignore_maybe_prior_trap; | |
1853 bool ignore_maybe_prior_recompile; | |
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1854 // Graal uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
5130 | 1855 bool update_total_counts = GRAAL_ONLY(false) NOT_GRAAL(true); |
0 | 1856 query_update_method_data(trap_mdo, trap_bci, |
1857 (DeoptReason)reason, | |
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1858 update_total_counts, |
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1860 false, |
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1861 #endif |
0 | 1862 ignore_this_trap_count, |
1863 ignore_maybe_prior_trap, | |
1864 ignore_maybe_prior_recompile); | |
1865 } | |
1866 | |
1867 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request) { | |
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1868 if (TraceDeoptimization) { |
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1869 tty->print("Uncommon trap "); |
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1870 } |
0 | 1871 // Still in Java no safepoints |
1872 { | |
1873 // This enters VM and may safepoint | |
1874 uncommon_trap_inner(thread, trap_request); | |
1875 } | |
1876 return fetch_unroll_info_helper(thread); | |
1877 } | |
1878 | |
1879 // Local derived constants. | |
1880 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
1881 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
1882 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
1883 | |
1884 //---------------------------trap_state_reason--------------------------------- | |
1885 Deoptimization::DeoptReason | |
1886 Deoptimization::trap_state_reason(int trap_state) { | |
1887 // This assert provides the link between the width of DataLayout::trap_bits | |
1888 // and the encoding of "recorded" reasons. It ensures there are enough | |
1889 // bits to store all needed reasons in the per-BCI MDO profile. | |
1890 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
1891 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1892 trap_state -= recompile_bit; | |
1893 if (trap_state == DS_REASON_MASK) { | |
1894 return Reason_many; | |
1895 } else { | |
1896 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
1897 return (DeoptReason)trap_state; | |
1898 } | |
1899 } | |
1900 //-------------------------trap_state_has_reason------------------------------- | |
1901 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
1902 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
1903 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
1904 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1905 trap_state -= recompile_bit; | |
1906 if (trap_state == DS_REASON_MASK) { | |
1907 return -1; // true, unspecifically (bottom of state lattice) | |
1908 } else if (trap_state == reason) { | |
1909 return 1; // true, definitely | |
1910 } else if (trap_state == 0) { | |
1911 return 0; // false, definitely (top of state lattice) | |
1912 } else { | |
1913 return 0; // false, definitely | |
1914 } | |
1915 } | |
1916 //-------------------------trap_state_add_reason------------------------------- | |
1917 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
1918 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
1919 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1920 trap_state -= recompile_bit; | |
1921 if (trap_state == DS_REASON_MASK) { | |
1922 return trap_state + recompile_bit; // already at state lattice bottom | |
1923 } else if (trap_state == reason) { | |
1924 return trap_state + recompile_bit; // the condition is already true | |
1925 } else if (trap_state == 0) { | |
1926 return reason + recompile_bit; // no condition has yet been true | |
1927 } else { | |
1928 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
1929 } | |
1930 } | |
1931 //-----------------------trap_state_is_recompiled------------------------------ | |
1932 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
1933 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
1934 } | |
1935 //-----------------------trap_state_set_recompiled----------------------------- | |
1936 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
1937 if (z) return trap_state | DS_RECOMPILE_BIT; | |
1938 else return trap_state & ~DS_RECOMPILE_BIT; | |
1939 } | |
1940 //---------------------------format_trap_state--------------------------------- | |
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1941 // This is used for debugging and diagnostics, including LogFile output. |
0 | 1942 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, |
1943 int trap_state) { | |
1944 DeoptReason reason = trap_state_reason(trap_state); | |
1945 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
1946 // Re-encode the state from its decoded components. | |
1947 int decoded_state = 0; | |
1948 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
1949 decoded_state = trap_state_add_reason(decoded_state, reason); | |
1950 if (recomp_flag) | |
1951 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
1952 // If the state re-encodes properly, format it symbolically. | |
1953 // Because this routine is used for debugging and diagnostics, | |
1954 // be robust even if the state is a strange value. | |
1955 size_t len; | |
1956 if (decoded_state != trap_state) { | |
1957 // Random buggy state that doesn't decode?? | |
1958 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
1959 } else { | |
1960 len = jio_snprintf(buf, buflen, "%s%s", | |
1961 trap_reason_name(reason), | |
1962 recomp_flag ? " recompiled" : ""); | |
1963 } | |
1964 if (len >= buflen) | |
1965 buf[buflen-1] = '\0'; | |
1966 return buf; | |
1967 } | |
1968 | |
1969 | |
1970 //--------------------------------statics-------------------------------------- | |
1971 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
1972 = Deoptimization::Action_reinterpret; | |
1973 const char* Deoptimization::_trap_reason_name[Reason_LIMIT] = { | |
1974 // Note: Keep this in sync. with enum DeoptReason. | |
1975 "none", | |
1976 "null_check", | |
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1977 "null_assert" GRAAL_ONLY("|unreached0"), |
0 | 1978 "range_check", |
1979 "class_check", | |
1980 "array_check", | |
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1981 "intrinsic" GRAAL_ONLY("|type_checked_inlining"), |
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1982 "bimorphic" GRAAL_ONLY("|optimized_type_check"), |
0 | 1983 "unloaded", |
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1984 "uninitialized" GRAAL_ONLY("|unresolved"), |
0 | 1985 "unreached", |
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1986 "unhandled" GRAAL_ONLY("|not_compiled_exception_handler"), |
0 | 1987 "constraint", |
1988 "div0_check", | |
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1989 "age" GRAAL_ONLY("|jsr_mismatch"), |
3345 | 1990 "predicate", |
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1991 "loop_limit_check", |
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1992 GRAAL_ONLY("aliasing") |
0 | 1993 }; |
1994 const char* Deoptimization::_trap_action_name[Action_LIMIT] = { | |
1995 // Note: Keep this in sync. with enum DeoptAction. | |
1996 "none", | |
1997 "maybe_recompile", | |
1998 "reinterpret", | |
1999 "make_not_entrant", | |
2000 "make_not_compilable" | |
2001 }; | |
2002 | |
2003 const char* Deoptimization::trap_reason_name(int reason) { | |
2004 if (reason == Reason_many) return "many"; | |
2005 if ((uint)reason < Reason_LIMIT) | |
2006 return _trap_reason_name[reason]; | |
2007 static char buf[20]; | |
2008 sprintf(buf, "reason%d", reason); | |
2009 return buf; | |
2010 } | |
2011 const char* Deoptimization::trap_action_name(int action) { | |
2012 if ((uint)action < Action_LIMIT) | |
2013 return _trap_action_name[action]; | |
2014 static char buf[20]; | |
2015 sprintf(buf, "action%d", action); | |
2016 return buf; | |
2017 } | |
2018 | |
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2019 // This is used for debugging and diagnostics, including LogFile output. |
0 | 2020 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, |
2021 int trap_request) { | |
2022 jint unloaded_class_index = trap_request_index(trap_request); | |
2023 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
2024 const char* action = trap_action_name(trap_request_action(trap_request)); | |
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2025 #ifdef GRAAL |
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2026 int debug_id = trap_request_debug_id(trap_request); |
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2027 #endif |
0 | 2028 size_t len; |
2029 if (unloaded_class_index < 0) { | |
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2030 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'" GRAAL_ONLY(" debug_id='%d'"), |
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2031 reason, action |
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2032 #ifdef GRAAL |
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2033 ,debug_id |
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2034 #endif |
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2035 ); |
0 | 2036 } else { |
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2037 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'" GRAAL_ONLY(" debug_id='%d'"), |
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2038 reason, action, unloaded_class_index |
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2039 #ifdef GRAAL |
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2040 ,debug_id |
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2041 #endif |
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2042 ); |
0 | 2043 } |
2044 if (len >= buflen) | |
2045 buf[buflen-1] = '\0'; | |
2046 return buf; | |
2047 } | |
2048 | |
2049 juint Deoptimization::_deoptimization_hist | |
2050 [Deoptimization::Reason_LIMIT] | |
2051 [1 + Deoptimization::Action_LIMIT] | |
2052 [Deoptimization::BC_CASE_LIMIT] | |
2053 = {0}; | |
2054 | |
2055 enum { | |
2056 LSB_BITS = 8, | |
2057 LSB_MASK = right_n_bits(LSB_BITS) | |
2058 }; | |
2059 | |
2060 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2061 Bytecodes::Code bc) { | |
2062 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
2063 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
2064 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
2065 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
2066 juint* cases = _deoptimization_hist[reason][1+action]; | |
2067 juint* bc_counter_addr = NULL; | |
2068 juint bc_counter = 0; | |
2069 // Look for an unused counter, or an exact match to this BC. | |
2070 if (bc != Bytecodes::_illegal) { | |
2071 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
2072 juint* counter_addr = &cases[bc_case]; | |
2073 juint counter = *counter_addr; | |
2074 if ((counter == 0 && bc_counter_addr == NULL) | |
2075 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
2076 // this counter is either free or is already devoted to this BC | |
2077 bc_counter_addr = counter_addr; | |
2078 bc_counter = counter | bc; | |
2079 } | |
2080 } | |
2081 } | |
2082 if (bc_counter_addr == NULL) { | |
2083 // Overflow, or no given bytecode. | |
2084 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
2085 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
2086 } | |
2087 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
2088 } | |
2089 | |
2090 jint Deoptimization::total_deoptimization_count() { | |
2091 return _deoptimization_hist[Reason_none][0][0]; | |
2092 } | |
2093 | |
2094 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
2095 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
2096 return _deoptimization_hist[reason][0][0]; | |
2097 } | |
2098 | |
2099 void Deoptimization::print_statistics() { | |
2100 juint total = total_deoptimization_count(); | |
2101 juint account = total; | |
2102 if (total != 0) { | |
2103 ttyLocker ttyl; | |
2104 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
2105 tty->print_cr("Deoptimization traps recorded:"); | |
2106 #define PRINT_STAT_LINE(name, r) \ | |
2107 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
2108 PRINT_STAT_LINE("total", total); | |
2109 // For each non-zero entry in the histogram, print the reason, | |
2110 // the action, and (if specifically known) the type of bytecode. | |
2111 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
2112 for (int action = 0; action < Action_LIMIT; action++) { | |
2113 juint* cases = _deoptimization_hist[reason][1+action]; | |
2114 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
2115 juint counter = cases[bc_case]; | |
2116 if (counter != 0) { | |
2117 char name[1*K]; | |
2118 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
2119 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
2120 bc = Bytecodes::_illegal; | |
2121 sprintf(name, "%s/%s/%s", | |
2122 trap_reason_name(reason), | |
2123 trap_action_name(action), | |
2124 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
2125 juint r = counter >> LSB_BITS; | |
2126 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
2127 account -= r; | |
2128 } | |
2129 } | |
2130 } | |
2131 } | |
2132 if (account != 0) { | |
2133 PRINT_STAT_LINE("unaccounted", account); | |
2134 } | |
2135 #undef PRINT_STAT_LINE | |
2136 if (xtty != NULL) xtty->tail("statistics"); | |
2137 } | |
2138 } | |
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2139 #else // COMPILER2 || SHARK || GRAAL |
0 | 2140 |
2141 | |
2142 // Stubs for C1 only system. | |
2143 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
2144 return false; | |
2145 } | |
2146 | |
2147 const char* Deoptimization::trap_reason_name(int reason) { | |
2148 return "unknown"; | |
2149 } | |
2150 | |
2151 void Deoptimization::print_statistics() { | |
2152 // no output | |
2153 } | |
2154 | |
2155 void | |
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2156 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 2157 // no udpate |
2158 } | |
2159 | |
2160 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
2161 return 0; | |
2162 } | |
2163 | |
2164 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2165 Bytecodes::Code bc) { | |
2166 // no update | |
2167 } | |
2168 | |
2169 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
2170 int trap_state) { | |
2171 jio_snprintf(buf, buflen, "#%d", trap_state); | |
2172 return buf; | |
2173 } | |
2174 | |
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2175 #endif // COMPILER2 || SHARK || GRAAL |