Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/deoptimization.cpp @ 19961:71040f48cc34
TraceDeoptimization: print compiler and compile_id
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Thu, 19 Mar 2015 19:27:25 +0100 |
parents | 1f95f91dd1d6 |
children | 7848fc12602b |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "code/debugInfoRec.hpp" | |
28 #include "code/nmethod.hpp" | |
29 #include "code/pcDesc.hpp" | |
30 #include "code/scopeDesc.hpp" | |
31 #include "interpreter/bytecode.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "memory/allocation.inline.hpp" | |
35 #include "memory/oopFactory.hpp" | |
36 #include "memory/resourceArea.hpp" | |
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37 #include "oops/method.hpp" |
1972 | 38 #include "oops/oop.inline.hpp" |
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39 #include "oops/fieldStreams.hpp" |
1972 | 40 #include "prims/jvmtiThreadState.hpp" |
41 #include "runtime/biasedLocking.hpp" | |
42 #include "runtime/compilationPolicy.hpp" | |
43 #include "runtime/deoptimization.hpp" | |
44 #include "runtime/interfaceSupport.hpp" | |
45 #include "runtime/sharedRuntime.hpp" | |
46 #include "runtime/signature.hpp" | |
47 #include "runtime/stubRoutines.hpp" | |
48 #include "runtime/thread.hpp" | |
49 #include "runtime/vframe.hpp" | |
50 #include "runtime/vframeArray.hpp" | |
51 #include "runtime/vframe_hp.hpp" | |
52 #include "utilities/events.hpp" | |
53 #include "utilities/xmlstream.hpp" | |
54 #ifdef TARGET_ARCH_x86 | |
55 # include "vmreg_x86.inline.hpp" | |
56 #endif | |
57 #ifdef TARGET_ARCH_sparc | |
58 # include "vmreg_sparc.inline.hpp" | |
59 #endif | |
60 #ifdef TARGET_ARCH_zero | |
61 # include "vmreg_zero.inline.hpp" | |
62 #endif | |
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63 #ifdef TARGET_ARCH_arm |
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64 # include "vmreg_arm.inline.hpp" |
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65 #endif |
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66 #ifdef TARGET_ARCH_ppc |
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67 # include "vmreg_ppc.inline.hpp" |
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68 #endif |
1972 | 69 #ifdef COMPILER2 |
70 #ifdef TARGET_ARCH_MODEL_x86_32 | |
71 # include "adfiles/ad_x86_32.hpp" | |
72 #endif | |
73 #ifdef TARGET_ARCH_MODEL_x86_64 | |
74 # include "adfiles/ad_x86_64.hpp" | |
75 #endif | |
76 #ifdef TARGET_ARCH_MODEL_sparc | |
77 # include "adfiles/ad_sparc.hpp" | |
78 #endif | |
79 #ifdef TARGET_ARCH_MODEL_zero | |
80 # include "adfiles/ad_zero.hpp" | |
81 #endif | |
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82 #ifdef TARGET_ARCH_MODEL_arm |
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83 # include "adfiles/ad_arm.hpp" |
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84 #endif |
14391 | 85 #ifdef TARGET_ARCH_MODEL_ppc_32 |
86 # include "adfiles/ad_ppc_32.hpp" | |
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87 #endif |
14391 | 88 #ifdef TARGET_ARCH_MODEL_ppc_64 |
89 # include "adfiles/ad_ppc_64.hpp" | |
1972 | 90 #endif |
14391 | 91 #endif // COMPILER2 |
0 | 92 |
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93 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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94 |
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95 #ifdef GRAAL |
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96 #include "graal/graalRuntime.hpp" |
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97 #include "graal/graalJavaAccess.hpp" |
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98 #endif |
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99 |
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100 |
0 | 101 bool DeoptimizationMarker::_is_active = false; |
102 | |
103 Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, | |
104 int caller_adjustment, | |
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105 int caller_actual_parameters, |
0 | 106 int number_of_frames, |
107 intptr_t* frame_sizes, | |
108 address* frame_pcs, | |
109 BasicType return_type) { | |
110 _size_of_deoptimized_frame = size_of_deoptimized_frame; | |
111 _caller_adjustment = caller_adjustment; | |
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112 _caller_actual_parameters = caller_actual_parameters; |
0 | 113 _number_of_frames = number_of_frames; |
114 _frame_sizes = frame_sizes; | |
115 _frame_pcs = frame_pcs; | |
6197 | 116 _register_block = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2, mtCompiler); |
0 | 117 _return_type = return_type; |
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118 _initial_info = 0; |
0 | 119 // PD (x86 only) |
120 _counter_temp = 0; | |
121 _unpack_kind = 0; | |
122 _sender_sp_temp = 0; | |
123 | |
124 _total_frame_sizes = size_of_frames(); | |
125 } | |
126 | |
127 | |
128 Deoptimization::UnrollBlock::~UnrollBlock() { | |
6197 | 129 FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes, mtCompiler); |
130 FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs, mtCompiler); | |
131 FREE_C_HEAP_ARRAY(intptr_t, _register_block, mtCompiler); | |
0 | 132 } |
133 | |
134 | |
135 intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const { | |
136 assert(register_number < RegisterMap::reg_count, "checking register number"); | |
137 return &_register_block[register_number * 2]; | |
138 } | |
139 | |
140 | |
141 | |
142 int Deoptimization::UnrollBlock::size_of_frames() const { | |
143 // Acount first for the adjustment of the initial frame | |
144 int result = _caller_adjustment; | |
145 for (int index = 0; index < number_of_frames(); index++) { | |
146 result += frame_sizes()[index]; | |
147 } | |
148 return result; | |
149 } | |
150 | |
151 | |
152 void Deoptimization::UnrollBlock::print() { | |
153 ttyLocker ttyl; | |
154 tty->print_cr("UnrollBlock"); | |
155 tty->print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame); | |
156 tty->print( " frame_sizes: "); | |
157 for (int index = 0; index < number_of_frames(); index++) { | |
158 tty->print("%d ", frame_sizes()[index]); | |
159 } | |
160 tty->cr(); | |
161 } | |
162 | |
163 | |
164 // In order to make fetch_unroll_info work properly with escape | |
165 // analysis, The method was changed from JRT_LEAF to JRT_BLOCK_ENTRY and | |
166 // ResetNoHandleMark and HandleMark were removed from it. The actual reallocation | |
167 // of previously eliminated objects occurs in realloc_objects, which is | |
168 // called from the method fetch_unroll_info_helper below. | |
169 JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* thread)) | |
170 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
171 // but makes the entry a little slower. There is however a little dance we have to | |
172 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
173 | |
174 // fetch_unroll_info() is called at the beginning of the deoptimization | |
175 // handler. Note this fact before we start generating temporary frames | |
176 // that can confuse an asynchronous stack walker. This counter is | |
177 // decremented at the end of unpack_frames(). | |
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178 if (TraceDeoptimization) { |
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179 tty->print_cr("Deoptimizing thread " INTPTR_FORMAT, thread); |
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180 } |
0 | 181 thread->inc_in_deopt_handler(); |
182 | |
183 return fetch_unroll_info_helper(thread); | |
184 JRT_END | |
185 | |
186 | |
187 // This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap) | |
188 Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* thread) { | |
189 | |
190 // Note: there is a safepoint safety issue here. No matter whether we enter | |
191 // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once | |
192 // the vframeArray is created. | |
193 // | |
194 | |
195 // Allocate our special deoptimization ResourceMark | |
196 DeoptResourceMark* dmark = new DeoptResourceMark(thread); | |
197 assert(thread->deopt_mark() == NULL, "Pending deopt!"); | |
198 thread->set_deopt_mark(dmark); | |
199 | |
200 frame stub_frame = thread->last_frame(); // Makes stack walkable as side effect | |
201 RegisterMap map(thread, true); | |
202 RegisterMap dummy_map(thread, false); | |
203 // Now get the deoptee with a valid map | |
204 frame deoptee = stub_frame.sender(&map); | |
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205 // Set the deoptee nmethod |
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206 assert(thread->deopt_nmethod() == NULL, "Pending deopt!"); |
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207 thread->set_deopt_nmethod(deoptee.cb()->as_nmethod_or_null()); |
0 | 208 |
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209 if (VerifyStack) { |
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210 thread->validate_frame_layout(); |
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211 } |
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212 |
0 | 213 // Create a growable array of VFrames where each VFrame represents an inlined |
214 // Java frame. This storage is allocated with the usual system arena. | |
215 assert(deoptee.is_compiled_frame(), "Wrong frame type"); | |
216 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); | |
217 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
218 while (!vf->is_top()) { | |
219 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
220 chunk->push(compiledVFrame::cast(vf)); | |
221 vf = vf->sender(); | |
222 } | |
223 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
224 chunk->push(compiledVFrame::cast(vf)); | |
225 | |
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226 #if defined(COMPILER2) || defined(GRAAL) |
0 | 227 // Reallocate the non-escaping objects and restore their fields. Then |
228 // relock objects if synchronization on them was eliminated. | |
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229 #ifdef COMPILER2 |
4777 | 230 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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231 if (EliminateAllocations) { |
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232 #endif // COMPILER2 |
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233 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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234 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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235 |
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236 // The flag return_oop() indicates call sites which return oop |
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237 // in compiled code. Such sites include java method calls, |
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238 // runtime calls (for example, used to allocate new objects/arrays |
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239 // on slow code path) and any other calls generated in compiled code. |
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240 // It is not guaranteed that we can get such information here only |
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241 // by analyzing bytecode in deoptimized frames. This is why this flag |
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242 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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243 bool save_oop_result = chunk->at(0)->scope()->return_oop(); |
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244 Handle return_value; |
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245 if (save_oop_result) { |
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246 // Reallocation may trigger GC. If deoptimization happened on return from |
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247 // call which returns oop we need to save it since it is not in oopmap. |
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248 oop result = deoptee.saved_oop_result(&map); |
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249 assert(result == NULL || result->is_oop(), "must be oop"); |
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250 return_value = Handle(thread, result); |
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251 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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252 if (TraceDeoptimization) { |
6843 | 253 ttyLocker ttyl; |
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254 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, (void *)result, thread); |
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255 } |
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256 } |
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257 bool reallocated = false; |
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258 if (objects != NULL) { |
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259 JRT_BLOCK |
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260 reallocated = realloc_objects(thread, &deoptee, objects, THREAD); |
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261 JRT_END |
0 | 262 } |
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263 if (reallocated) { |
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264 reassign_fields(&deoptee, &map, objects); |
0 | 265 #ifndef PRODUCT |
266 if (TraceDeoptimization) { | |
267 ttyLocker ttyl; | |
44
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268 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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269 print_objects(objects); |
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270 } |
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271 #endif |
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272 } |
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273 if (save_oop_result) { |
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274 // Restore result. |
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275 deoptee.set_saved_oop_result(&map, return_value()); |
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276 } |
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277 #ifdef COMPILER2 |
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278 } |
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279 if (EliminateLocks) { |
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280 #endif // COMPILER2 |
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281 #ifndef PRODUCT |
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282 bool first = true; |
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283 #endif |
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284 for (int i = 0; i < chunk->length(); i++) { |
83
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285 compiledVFrame* cvf = chunk->at(i); |
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286 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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287 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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288 if (monitors->is_nonempty()) { |
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289 relock_objects(monitors, thread); |
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290 #ifndef PRODUCT |
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291 if (PrintDeoptimizationDetails) { |
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292 ttyLocker ttyl; |
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293 for (int j = 0; j < monitors->length(); j++) { |
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294 MonitorInfo* mi = monitors->at(j); |
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295 if (mi->eliminated()) { |
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296 if (first) { |
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297 first = false; |
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298 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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299 } |
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300 tty->print_cr(" object <" INTPTR_FORMAT "> locked", (void *)mi->owner()); |
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301 } |
0 | 302 } |
303 } | |
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304 #endif // !PRODUCT |
0 | 305 } |
306 } | |
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307 #ifdef COMPILER2 |
0 | 308 } |
309 } | |
310 #endif // COMPILER2 | |
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311 #endif // COMPILER2 || GRAAL |
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312 |
0 | 313 // Ensure that no safepoint is taken after pointers have been stored |
314 // in fields of rematerialized objects. If a safepoint occurs from here on | |
315 // out the java state residing in the vframeArray will be missed. | |
316 No_Safepoint_Verifier no_safepoint; | |
317 | |
318 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk); | |
319 | |
320 assert(thread->vframe_array_head() == NULL, "Pending deopt!");; | |
321 thread->set_vframe_array_head(array); | |
322 | |
323 // Now that the vframeArray has been created if we have any deferred local writes | |
324 // added by jvmti then we can free up that structure as the data is now in the | |
325 // vframeArray | |
326 | |
327 if (thread->deferred_locals() != NULL) { | |
328 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals(); | |
329 int i = 0; | |
330 do { | |
331 // Because of inlining we could have multiple vframes for a single frame | |
332 // and several of the vframes could have deferred writes. Find them all. | |
333 if (list->at(i)->id() == array->original().id()) { | |
334 jvmtiDeferredLocalVariableSet* dlv = list->at(i); | |
335 list->remove_at(i); | |
336 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
337 delete dlv; | |
338 } else { | |
339 i++; | |
340 } | |
341 } while ( i < list->length() ); | |
342 if (list->length() == 0) { | |
343 thread->set_deferred_locals(NULL); | |
344 // free the list and elements back to C heap. | |
345 delete list; | |
346 } | |
347 | |
348 } | |
349 | |
1692 | 350 #ifndef SHARK |
0 | 351 // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
352 CodeBlob* cb = stub_frame.cb(); | |
353 // Verify we have the right vframeArray | |
354 assert(cb->frame_size() >= 0, "Unexpected frame size"); | |
355 intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); | |
356 | |
1204 | 357 // If the deopt call site is a MethodHandle invoke call site we have |
358 // to adjust the unpack_sp. | |
359 nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); | |
360 if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc())) | |
361 unpack_sp = deoptee.unextended_sp(); | |
362 | |
0 | 363 #ifdef ASSERT |
15104 | 364 assert(cb->is_deoptimization_stub() || |
365 cb->is_uncommon_trap_stub() || | |
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366 strcmp("Stub<DeoptimizationStub.deoptimizationHandler>", cb->name()) == 0 || |
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367 strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>", cb->name()) == 0, |
15104 | 368 err_msg("unexpected code blob: %s", cb->name())); |
0 | 369 #endif |
1692 | 370 #else |
371 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
372 #endif // !SHARK | |
373 | |
0 | 374 // This is a guarantee instead of an assert because if vframe doesn't match |
375 // we will unpack the wrong deoptimized frame and wind up in strange places | |
376 // where it will be very difficult to figure out what went wrong. Better | |
377 // to die an early death here than some very obscure death later when the | |
378 // trail is cold. | |
379 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
380 // in that it will fail to detect a problem when there is one. This needs | |
381 // more work in tiger timeframe. | |
382 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
383 | |
384 int number_of_frames = array->frames(); | |
385 | |
386 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
387 // virtual activation, which is the reverse of the elements in the vframes array. | |
6197 | 388 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
0 | 389 // +1 because we always have an interpreter return address for the final slot. |
6197 | 390 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
0 | 391 int popframe_extra_args = 0; |
392 // Create an interpreter return address for the stub to use as its return | |
393 // address so the skeletal frames are perfectly walkable | |
394 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
395 | |
396 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
397 // activation be put back on the expression stack of the caller for reexecution | |
398 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
399 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
400 } | |
401 | |
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402 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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403 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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404 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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405 // |
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406 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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407 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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408 |
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409 // It's possible that the number of paramters at the call site is |
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410 // different than number of arguments in the callee when method |
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411 // handles are used. If the caller is interpreted get the real |
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412 // value so that the proper amount of space can be added to it's |
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413 // frame. |
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414 bool caller_was_method_handle = false; |
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415 if (deopt_sender.is_interpreted_frame()) { |
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416 methodHandle method = deopt_sender.interpreter_frame_method(); |
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417 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
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418 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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419 // Method handle invokes may involve fairly arbitrary chains of |
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420 // calls so it's impossible to know how much actual space the |
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421 // caller has for locals. |
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422 caller_was_method_handle = true; |
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423 } |
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424 } |
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425 |
0 | 426 // |
427 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
428 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
429 // frame_sizes/frame_pcs[n] youngest frame (int) | |
430 // | |
431 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
432 // owns the space for the return address to it's caller). Confusing ain't it. | |
433 // | |
434 // The vframe array can address vframes with indices running from | |
435 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
436 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
437 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
438 // so things look a little strange in this loop. | |
439 // | |
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440 int callee_parameters = 0; |
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441 int callee_locals = 0; |
0 | 442 for (int index = 0; index < array->frames(); index++ ) { |
443 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
444 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
445 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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446 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(callee_parameters, |
0 | 447 callee_locals, |
448 index == 0, | |
449 popframe_extra_args); | |
450 // This pc doesn't have to be perfect just good enough to identify the frame | |
451 // as interpreted so the skeleton frame will be walkable | |
452 // The correct pc will be set when the skeleton frame is completely filled out | |
453 // The final pc we store in the loop is wrong and will be overwritten below | |
454 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
455 | |
456 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
457 callee_locals = array->element(index)->method()->max_locals(); | |
458 popframe_extra_args = 0; | |
459 } | |
460 | |
461 // Compute whether the root vframe returns a float or double value. | |
462 BasicType return_type; | |
463 { | |
464 HandleMark hm; | |
465 methodHandle method(thread, array->element(0)->method()); | |
2142 | 466 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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467 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
0 | 468 } |
469 | |
470 // Compute information for handling adapters and adjusting the frame size of the caller. | |
471 int caller_adjustment = 0; | |
472 | |
473 // Compute the amount the oldest interpreter frame will have to adjust | |
474 // its caller's stack by. If the caller is a compiled frame then | |
475 // we pretend that the callee has no parameters so that the | |
476 // extension counts for the full amount of locals and not just | |
477 // locals-parms. This is because without a c2i adapter the parm | |
478 // area as created by the compiled frame will not be usable by | |
479 // the interpreter. (Depending on the calling convention there | |
480 // may not even be enough space). | |
481 | |
482 // QQQ I'd rather see this pushed down into last_frame_adjust | |
483 // and have it take the sender (aka caller). | |
484 | |
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485 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
0 | 486 caller_adjustment = last_frame_adjust(0, callee_locals); |
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487 } else if (callee_locals > callee_parameters) { |
0 | 488 // The caller frame may need extending to accommodate |
489 // non-parameter locals of the first unpacked interpreted frame. | |
490 // Compute that adjustment. | |
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491 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
0 | 492 } |
493 | |
494 // If the sender is deoptimized the we must retrieve the address of the handler | |
495 // since the frame will "magically" show the original pc before the deopt | |
496 // and we'd undo the deopt. | |
497 | |
498 frame_pcs[0] = deopt_sender.raw_pc(); | |
499 | |
1692 | 500 #ifndef SHARK |
0 | 501 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
1692 | 502 #endif // SHARK |
0 | 503 |
504 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, | |
505 caller_adjustment * BytesPerWord, | |
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506 caller_was_method_handle ? 0 : callee_parameters, |
0 | 507 number_of_frames, |
508 frame_sizes, | |
509 frame_pcs, | |
510 return_type); | |
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511 // On some platforms, we need a way to pass some platform dependent |
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512 // information to the unpacking code so the skeletal frames come out |
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513 // correct (initial fp value, unextended sp, ...) |
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514 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
0 | 515 |
516 if (array->frames() > 1) { | |
517 if (VerifyStack && TraceDeoptimization) { | |
6843 | 518 ttyLocker ttyl; |
0 | 519 tty->print_cr("Deoptimizing method containing inlining"); |
520 } | |
521 } | |
522 | |
523 array->set_unroll_block(info); | |
524 return info; | |
525 } | |
526 | |
527 // Called to cleanup deoptimization data structures in normal case | |
528 // after unpacking to stack and when stack overflow error occurs | |
529 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
530 vframeArray *array) { | |
531 | |
532 // Get array if coming from exception | |
533 if (array == NULL) { | |
534 array = thread->vframe_array_head(); | |
535 } | |
536 thread->set_vframe_array_head(NULL); | |
537 | |
538 // Free the previous UnrollBlock | |
539 vframeArray* old_array = thread->vframe_array_last(); | |
540 thread->set_vframe_array_last(array); | |
541 | |
542 if (old_array != NULL) { | |
543 UnrollBlock* old_info = old_array->unroll_block(); | |
544 old_array->set_unroll_block(NULL); | |
545 delete old_info; | |
546 delete old_array; | |
547 } | |
548 | |
549 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
550 // inside the vframeArray (StackValueCollections) | |
551 | |
552 delete thread->deopt_mark(); | |
553 thread->set_deopt_mark(NULL); | |
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554 thread->set_deopt_nmethod(NULL); |
0 | 555 |
556 | |
557 if (JvmtiExport::can_pop_frame()) { | |
558 #ifndef CC_INTERP | |
559 // Regardless of whether we entered this routine with the pending | |
560 // popframe condition bit set, we should always clear it now | |
561 thread->clear_popframe_condition(); | |
562 #else | |
563 // C++ interpeter will clear has_pending_popframe when it enters | |
564 // with method_resume. For deopt_resume2 we clear it now. | |
565 if (thread->popframe_forcing_deopt_reexecution()) | |
566 thread->clear_popframe_condition(); | |
567 #endif /* CC_INTERP */ | |
568 } | |
569 | |
570 // unpack_frames() is called at the end of the deoptimization handler | |
571 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
572 // so that an asynchronous stack walker can work again. This counter is | |
573 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
574 // the beginning of uncommon_trap(). | |
575 thread->dec_in_deopt_handler(); | |
576 } | |
577 | |
578 | |
579 // Return BasicType of value being returned | |
580 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
581 | |
582 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
583 // allocate will be freed at the end of the routine. | |
584 | |
585 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
586 // but makes the entry a little slower. There is however a little dance we have to | |
587 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
588 ResetNoHandleMark rnhm; // No-op in release/product versions | |
589 HandleMark hm; | |
590 | |
591 frame stub_frame = thread->last_frame(); | |
592 | |
593 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
594 // must point to the vframeArray for the unpack frame. | |
595 vframeArray* array = thread->vframe_array_head(); | |
596 | |
597 #ifndef PRODUCT | |
598 if (TraceDeoptimization) { | |
6843 | 599 ttyLocker ttyl; |
0 | 600 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
601 } | |
602 #endif | |
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603 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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604 stub_frame.pc(), stub_frame.sp(), exec_mode); |
0 | 605 |
606 UnrollBlock* info = array->unroll_block(); | |
607 | |
608 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
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609 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
0 | 610 |
611 BasicType bt = info->return_type(); | |
612 | |
613 // If we have an exception pending, claim that the return type is an oop | |
614 // so the deopt_blob does not overwrite the exception_oop. | |
615 | |
616 if (exec_mode == Unpack_exception) | |
617 bt = T_OBJECT; | |
618 | |
619 // Cleanup thread deopt data | |
620 cleanup_deopt_info(thread, array); | |
621 | |
622 #ifndef PRODUCT | |
623 if (VerifyStack) { | |
624 ResourceMark res_mark; | |
625 | |
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626 thread->validate_frame_layout(); |
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627 |
0 | 628 // Verify that the just-unpacked frames match the interpreter's |
629 // notions of expression stack and locals | |
630 vframeArray* cur_array = thread->vframe_array_last(); | |
631 RegisterMap rm(thread, false); | |
632 rm.set_include_argument_oops(false); | |
633 bool is_top_frame = true; | |
634 int callee_size_of_parameters = 0; | |
635 int callee_max_locals = 0; | |
636 for (int i = 0; i < cur_array->frames(); i++) { | |
637 vframeArrayElement* el = cur_array->element(i); | |
638 frame* iframe = el->iframe(); | |
639 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
640 | |
641 // Get the oop map for this bci | |
642 InterpreterOopMap mask; | |
643 int cur_invoke_parameter_size = 0; | |
644 bool try_next_mask = false; | |
645 int next_mask_expression_stack_size = -1; | |
646 int top_frame_expression_stack_adjustment = 0; | |
647 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
648 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
649 BytecodeStream str(mh); | |
650 str.set_start(iframe->interpreter_frame_bci()); | |
651 int max_bci = mh->code_size(); | |
652 // Get to the next bytecode if possible | |
653 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
654 // Check to see if we can grab the number of outgoing arguments | |
655 // at an uncommon trap for an invoke (where the compiler | |
656 // generates debug info before the invoke has executed) | |
657 Bytecodes::Code cur_code = str.next(); | |
10390 | 658 if (cur_code == Bytecodes::_invokevirtual || |
659 cur_code == Bytecodes::_invokespecial || | |
660 cur_code == Bytecodes::_invokestatic || | |
661 cur_code == Bytecodes::_invokeinterface || | |
662 cur_code == Bytecodes::_invokedynamic) { | |
2142 | 663 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
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664 Symbol* signature = invoke.signature(); |
0 | 665 ArgumentSizeComputer asc(signature); |
666 cur_invoke_parameter_size = asc.size(); | |
10390 | 667 if (invoke.has_receiver()) { |
0 | 668 // Add in receiver |
669 ++cur_invoke_parameter_size; | |
670 } | |
10390 | 671 if (i != 0 && !invoke.is_invokedynamic() && MethodHandles::has_member_arg(invoke.klass(), invoke.name())) { |
672 callee_size_of_parameters++; | |
673 } | |
0 | 674 } |
675 if (str.bci() < max_bci) { | |
676 Bytecodes::Code bc = str.next(); | |
677 if (bc >= 0) { | |
678 // The interpreter oop map generator reports results before | |
679 // the current bytecode has executed except in the case of | |
680 // calls. It seems to be hard to tell whether the compiler | |
681 // has emitted debug information matching the "state before" | |
682 // a given bytecode or the state after, so we try both | |
683 switch (cur_code) { | |
684 case Bytecodes::_invokevirtual: | |
685 case Bytecodes::_invokespecial: | |
686 case Bytecodes::_invokestatic: | |
687 case Bytecodes::_invokeinterface: | |
10390 | 688 case Bytecodes::_invokedynamic: |
0 | 689 case Bytecodes::_athrow: |
690 break; | |
691 default: { | |
692 InterpreterOopMap next_mask; | |
693 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
694 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
695 // Need to subtract off the size of the result type of | |
696 // the bytecode because this is not described in the | |
697 // debug info but returned to the interpreter in the TOS | |
698 // caching register | |
699 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
700 if (bytecode_result_type != T_ILLEGAL) { | |
701 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
702 } | |
703 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
704 try_next_mask = true; | |
705 break; | |
706 } | |
707 } | |
708 } | |
709 } | |
710 | |
711 // Verify stack depth and oops in frame | |
712 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
713 if (!( | |
714 /* SPARC */ | |
715 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
716 /* x86 */ | |
717 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
718 (try_next_mask && | |
719 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
720 top_frame_expression_stack_adjustment))) || | |
721 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
722 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute) && | |
723 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) | |
724 )) { | |
725 ttyLocker ttyl; | |
726 | |
727 // Print out some information that will help us debug the problem | |
728 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
729 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
730 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
731 iframe->interpreter_frame_expression_stack_size()); | |
732 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
733 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
734 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
735 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
736 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
737 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
738 tty->print_cr(" exec_mode = %d", exec_mode); | |
739 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
740 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
741 tty->print_cr(" Interpreted frames:"); | |
742 for (int k = 0; k < cur_array->frames(); k++) { | |
743 vframeArrayElement* el = cur_array->element(k); | |
744 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
745 } | |
746 cur_array->print_on_2(tty); | |
747 guarantee(false, "wrong number of expression stack elements during deopt"); | |
748 } | |
749 VerifyOopClosure verify; | |
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750 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
0 | 751 callee_size_of_parameters = mh->size_of_parameters(); |
752 callee_max_locals = mh->max_locals(); | |
753 is_top_frame = false; | |
754 } | |
755 } | |
756 #endif /* !PRODUCT */ | |
757 | |
758 | |
759 return bt; | |
760 JRT_END | |
761 | |
762 | |
763 int Deoptimization::deoptimize_dependents() { | |
764 Threads::deoptimized_wrt_marked_nmethods(); | |
765 return 0; | |
766 } | |
767 | |
768 | |
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769 #if defined(COMPILER2) || defined(GRAAL) |
0 | 770 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
771 Handle pending_exception(thread->pending_exception()); | |
772 const char* exception_file = thread->exception_file(); | |
773 int exception_line = thread->exception_line(); | |
774 thread->clear_pending_exception(); | |
775 | |
776 for (int i = 0; i < objects->length(); i++) { | |
777 assert(objects->at(i)->is_object(), "invalid debug information"); | |
778 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
779 | |
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780 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 781 oop obj = NULL; |
782 | |
783 if (k->oop_is_instance()) { | |
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784 InstanceKlass* ik = InstanceKlass::cast(k()); |
0 | 785 obj = ik->allocate_instance(CHECK_(false)); |
786 } else if (k->oop_is_typeArray()) { | |
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787 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 788 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
789 int len = sv->field_size() / type2size[ak->element_type()]; | |
790 obj = ak->allocate(len, CHECK_(false)); | |
791 } else if (k->oop_is_objArray()) { | |
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792 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
0 | 793 obj = ak->allocate(sv->field_size(), CHECK_(false)); |
794 } | |
795 | |
796 assert(obj != NULL, "allocation failed"); | |
797 assert(sv->value().is_null(), "redundant reallocation"); | |
798 sv->set_value(obj); | |
799 } | |
800 | |
801 if (pending_exception.not_null()) { | |
802 thread->set_pending_exception(pending_exception(), exception_file, exception_line); | |
803 } | |
804 | |
805 return true; | |
806 } | |
807 | |
808 // restore elements of an eliminated type array | |
809 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
810 int index = 0; | |
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811 intptr_t val; |
0 | 812 |
813 for (int i = 0; i < sv->field_size(); i++) { | |
814 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
815 switch(type) { | |
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816 case T_LONG: case T_DOUBLE: { |
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817 assert(value->type() == T_INT, "Agreement."); |
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818 StackValue* low = |
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819 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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820 #ifdef _LP64 |
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821 jlong res = (jlong)low->get_int(); |
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822 #else |
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823 #ifdef SPARC |
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824 // For SPARC we have to swap high and low words. |
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825 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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826 #else |
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827 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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828 #endif //SPARC |
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829 #endif |
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830 obj->long_at_put(index, res); |
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831 break; |
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832 } |
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833 |
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834 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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835 case T_INT: case T_FLOAT: { // 4 bytes. |
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836 assert(value->type() == T_INT, "Agreement."); |
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837 bool big_value = false; |
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838 if (i + 1 < sv->field_size() && type == T_INT) { |
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839 if (sv->field_at(i)->is_location()) { |
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840 Location::Type type = ((LocationValue*) sv->field_at(i))->location().type(); |
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841 if (type == Location::dbl || type == Location::lng) { |
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842 big_value = true; |
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843 } |
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844 } else if (sv->field_at(i)->is_constant_int()) { |
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845 ScopeValue* next_scope_field = sv->field_at(i + 1); |
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846 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
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847 big_value = true; |
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848 } |
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849 } |
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Truffle: fix deoptimization of int[] with double/long values
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850 } |
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851 |
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Truffle: fix deoptimization of int[] with double/long values
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|
852 if (big_value) { |
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853 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
5c1bd485c54b
Truffle: fix deoptimization of int[] with double/long values
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|
854 #ifdef _LP64 |
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855 jlong res = (jlong)low->get_int(); |
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Truffle: fix deoptimization of int[] with double/long values
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856 #else |
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857 #ifdef SPARC |
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858 // For SPARC we have to swap high and low words. |
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859 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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860 #else |
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861 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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862 #endif //SPARC |
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863 #endif |
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864 obj->int_at_put(index, (jint)*((jint*)&res)); |
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865 obj->int_at_put(++index, (jint)*(((jint*)&res) + 1)); |
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866 } else { |
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867 val = value->get_int(); |
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868 obj->int_at_put(index, (jint)*((jint*)&val)); |
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869 } |
44
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|
870 break; |
18133
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871 } |
44
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|
872 |
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diff
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|
873 case T_SHORT: case T_CHAR: // 2 bytes |
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|
874 assert(value->type() == T_INT, "Agreement."); |
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875 val = value->get_int(); |
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diff
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|
876 obj->short_at_put(index, (jshort)*((jint*)&val)); |
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|
877 break; |
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diff
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|
878 |
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kvn
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diff
changeset
|
879 case T_BOOLEAN: case T_BYTE: // 1 byte |
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880 assert(value->type() == T_INT, "Agreement."); |
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|
881 val = value->get_int(); |
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|
882 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
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|
883 break; |
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|
884 |
0 | 885 default: |
886 ShouldNotReachHere(); | |
887 } | |
888 index++; | |
889 } | |
890 } | |
891 | |
892 | |
893 // restore fields of an eliminated object array | |
894 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
895 for (int i = 0; i < sv->field_size(); i++) { | |
896 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
897 assert(value->type() == T_OBJECT, "object element expected"); | |
898 obj->obj_at_put(i, value->get_obj()()); | |
899 } | |
900 } | |
901 | |
7222 | 902 class ReassignedField { |
903 public: | |
904 int _offset; | |
905 BasicType _type; | |
906 public: | |
907 ReassignedField() { | |
908 _offset = 0; | |
909 _type = T_ILLEGAL; | |
910 } | |
911 }; | |
7137
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912 |
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|
913 int compare(ReassignedField* left, ReassignedField* right) { |
7222 | 914 return left->_offset - right->_offset; |
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915 } |
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916 |
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917 // Restore fields of an eliminated instance object using the same field order |
18223
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|
918 // returned by HotSpotResolvedObjectTypeImpl.getInstanceFields(true) |
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919 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj) { |
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920 if (klass->superklass() != NULL) { |
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921 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj); |
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|
922 } |
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923 |
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924 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
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925 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
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|
926 if (!fs.access_flags().is_static()) { |
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|
927 ReassignedField field; |
7222 | 928 field._offset = fs.offset(); |
929 field._type = FieldType::basic_type(fs.signature()); | |
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|
930 fields->append(field); |
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Doug Simon <doug.simon@oracle.com>
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931 } |
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932 } |
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unify object reallocation code for c2 and Graal
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|
933 fields->sort(compare); |
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|
934 for (int i = 0; i < fields->length(); i++) { |
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|
935 intptr_t val; |
12617
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936 ScopeValue* scope_field = sv->field_at(svIndex); |
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937 StackValue* value = StackValue::create_stack_value(fr, reg_map, scope_field); |
7222 | 938 int offset = fields->at(i)._offset; |
939 BasicType type = fields->at(i)._type; | |
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|
940 switch (type) { |
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|
941 case T_OBJECT: case T_ARRAY: |
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|
942 assert(value->type() == T_OBJECT, "Agreement."); |
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|
943 obj->obj_field_put(offset, value->get_obj()()); |
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|
944 break; |
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|
945 |
12617
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|
946 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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|
947 case T_INT: case T_FLOAT: { // 4 bytes. |
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|
948 assert(value->type() == T_INT, "Agreement."); |
bca33c3135de
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|
949 bool big_value = false; |
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|
950 if (i+1 < fields->length() && fields->at(i+1)._type == T_INT) { |
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|
951 if (scope_field->is_location()) { |
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diff
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|
952 Location::Type type = ((LocationValue*) scope_field)->location().type(); |
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Lukas Stadler <lukas.stadler@jku.at>
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|
953 if (type == Location::dbl || type == Location::lng) { |
bca33c3135de
PEA: support for unsafe stores of mismatching sizes, cleanup, documentation
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diff
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|
954 big_value = true; |
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|
955 } |
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Lukas Stadler <lukas.stadler@jku.at>
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|
956 } |
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Lukas Stadler <lukas.stadler@jku.at>
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|
957 if (scope_field->is_constant_int()) { |
bca33c3135de
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|
958 ScopeValue* next_scope_field = sv->field_at(svIndex + 1); |
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|
959 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
bca33c3135de
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diff
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|
960 big_value = true; |
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|
961 } |
bca33c3135de
PEA: support for unsafe stores of mismatching sizes, cleanup, documentation
Lukas Stadler <lukas.stadler@jku.at>
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|
962 } |
bca33c3135de
PEA: support for unsafe stores of mismatching sizes, cleanup, documentation
Lukas Stadler <lukas.stadler@jku.at>
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diff
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|
963 } |
bca33c3135de
PEA: support for unsafe stores of mismatching sizes, cleanup, documentation
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|
964 |
bca33c3135de
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diff
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|
965 if (big_value) { |
bca33c3135de
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diff
changeset
|
966 i++; |
bca33c3135de
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changeset
|
967 assert(i < fields->length(), "second T_INT field needed"); |
bca33c3135de
PEA: support for unsafe stores of mismatching sizes, cleanup, documentation
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diff
changeset
|
968 assert(fields->at(i)._type == T_INT, "T_INT field needed"); |
bca33c3135de
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|
969 } else { |
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|
970 val = value->get_int(); |
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|
971 obj->int_field_put(offset, (jint)*((jint*)&val)); |
bca33c3135de
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|
972 break; |
bca33c3135de
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|
973 } |
bca33c3135de
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|
974 } |
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|
975 /* no break */ |
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|
976 |
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|
977 case T_LONG: case T_DOUBLE: { |
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|
978 assert(value->type() == T_INT, "Agreement."); |
e522a00b91aa
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979 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
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980 #ifdef _LP64 |
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981 jlong res = (jlong)low->get_int(); |
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982 #else |
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983 #ifdef SPARC |
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984 // For SPARC we have to swap high and low words. |
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985 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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986 #else |
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987 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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988 #endif //SPARC |
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989 #endif |
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990 obj->long_field_put(offset, res); |
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991 break; |
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992 } |
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993 |
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994 case T_SHORT: case T_CHAR: // 2 bytes |
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995 assert(value->type() == T_INT, "Agreement."); |
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996 val = value->get_int(); |
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997 obj->short_field_put(offset, (jshort)*((jint*)&val)); |
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998 break; |
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999 |
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1000 case T_BOOLEAN: case T_BYTE: // 1 byte |
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1001 assert(value->type() == T_INT, "Agreement."); |
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1002 val = value->get_int(); |
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1003 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
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1004 break; |
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1005 |
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1006 default: |
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1007 ShouldNotReachHere(); |
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1008 } |
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1009 svIndex++; |
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1010 } |
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1011 return svIndex; |
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1012 } |
0 | 1013 |
1014 // restore fields of all eliminated objects and arrays | |
1015 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects) { | |
1016 for (int i = 0; i < objects->length(); i++) { | |
1017 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1018 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 1019 Handle obj = sv->value(); |
1020 assert(obj.not_null(), "reallocation was missed"); | |
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1021 if (PrintDeoptimizationDetails) { |
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1022 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
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1023 } |
0 | 1024 |
1025 if (k->oop_is_instance()) { | |
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1026 InstanceKlass* ik = InstanceKlass::cast(k()); |
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1027 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj()); |
0 | 1028 } else if (k->oop_is_typeArray()) { |
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1029 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 1030 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
1031 } else if (k->oop_is_objArray()) { | |
1032 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
1033 } | |
1034 } | |
1035 } | |
1036 | |
1037 | |
1038 // relock objects for which synchronization was eliminated | |
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1039 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread) { |
0 | 1040 for (int i = 0; i < monitors->length(); i++) { |
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1041 MonitorInfo* mon_info = monitors->at(i); |
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1042 if (mon_info->eliminated()) { |
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1043 assert(mon_info->owner() != NULL, "reallocation was missed"); |
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1044 Handle obj = Handle(mon_info->owner()); |
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1045 markOop mark = obj->mark(); |
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1046 if (UseBiasedLocking && mark->has_bias_pattern()) { |
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1047 // New allocated objects may have the mark set to anonymously biased. |
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1048 // Also the deoptimized method may called methods with synchronization |
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1049 // where the thread-local object is bias locked to the current thread. |
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1050 assert(mark->is_biased_anonymously() || |
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1051 mark->biased_locker() == thread, "should be locked to current thread"); |
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1052 // Reset mark word to unbiased prototype. |
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1053 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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1054 obj->set_mark(unbiased_prototype); |
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1055 } |
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1056 BasicLock* lock = mon_info->lock(); |
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1057 ObjectSynchronizer::slow_enter(obj, lock, thread); |
0 | 1058 } |
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1059 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
0 | 1060 } |
1061 } | |
1062 | |
1063 | |
1064 #ifndef PRODUCT | |
1065 // print information about reallocated objects | |
1066 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects) { | |
1067 fieldDescriptor fd; | |
1068 | |
1069 for (int i = 0; i < objects->length(); i++) { | |
1070 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1071 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 1072 Handle obj = sv->value(); |
1073 | |
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1074 tty->print(" object <" INTPTR_FORMAT "> of type ", (void *)sv->value()()); |
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1075 k->print_value(); |
0 | 1076 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
1077 tty->cr(); | |
1078 | |
1079 if (Verbose) { | |
1080 k->oop_print_on(obj(), tty); | |
1081 } | |
1082 } | |
1083 } | |
1084 #endif | |
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1085 #endif // COMPILER2 || GRAAL |
0 | 1086 |
1087 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk) { | |
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1088 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
0 | 1089 |
1090 #ifndef PRODUCT | |
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1091 if (PrintDeoptimizationDetails) { |
0 | 1092 ttyLocker ttyl; |
1093 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
1094 fr.print_on(tty); | |
1095 tty->print_cr(" Virtual frames (innermost first):"); | |
1096 for (int index = 0; index < chunk->length(); index++) { | |
1097 compiledVFrame* vf = chunk->at(index); | |
1098 tty->print(" %2d - ", index); | |
1099 vf->print_value(); | |
1100 int bci = chunk->at(index)->raw_bci(); | |
1101 const char* code_name; | |
1102 if (bci == SynchronizationEntryBCI) { | |
1103 code_name = "sync entry"; | |
1104 } else { | |
2142 | 1105 Bytecodes::Code code = vf->method()->code_at(bci); |
0 | 1106 code_name = Bytecodes::name(code); |
1107 } | |
1108 tty->print(" - %s", code_name); | |
1109 tty->print_cr(" @ bci %d ", bci); | |
1110 if (Verbose) { | |
1111 vf->print(); | |
1112 tty->cr(); | |
1113 } | |
1114 } | |
1115 } | |
1116 #endif | |
1117 | |
1118 // Register map for next frame (used for stack crawl). We capture | |
1119 // the state of the deopt'ing frame's caller. Thus if we need to | |
1120 // stuff a C2I adapter we can properly fill in the callee-save | |
1121 // register locations. | |
1122 frame caller = fr.sender(reg_map); | |
1123 int frame_size = caller.sp() - fr.sp(); | |
1124 | |
1125 frame sender = caller; | |
1126 | |
1127 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
1128 // the vframeArray containing the unpacking information is allocated in the C heap. | |
1129 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
1130 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr); | |
1131 | |
1132 // Compare the vframeArray to the collected vframes | |
1133 assert(array->structural_compare(thread, chunk), "just checking"); | |
1134 | |
1135 #ifndef PRODUCT | |
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1136 if (PrintDeoptimizationDetails) { |
0 | 1137 ttyLocker ttyl; |
1138 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
1139 } | |
1140 #endif // PRODUCT | |
1141 | |
1142 return array; | |
1143 } | |
1144 | |
1145 | |
1146 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
1147 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
1148 for (int i = 0; i < monitors->length(); i++) { | |
1149 MonitorInfo* mon_info = monitors->at(i); | |
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1150 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
0 | 1151 objects_to_revoke->append(Handle(mon_info->owner())); |
1152 } | |
1153 } | |
1154 } | |
1155 | |
1156 | |
1157 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
1158 if (!UseBiasedLocking) { | |
1159 return; | |
1160 } | |
1161 | |
1162 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1163 | |
1164 // Unfortunately we don't have a RegisterMap available in most of | |
1165 // the places we want to call this routine so we need to walk the | |
1166 // stack again to update the register map. | |
1167 if (map == NULL || !map->update_map()) { | |
1168 StackFrameStream sfs(thread, true); | |
1169 bool found = false; | |
1170 while (!found && !sfs.is_done()) { | |
1171 frame* cur = sfs.current(); | |
1172 sfs.next(); | |
1173 found = cur->id() == fr.id(); | |
1174 } | |
1175 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
1176 map = sfs.register_map(); | |
1177 } | |
1178 | |
1179 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
1180 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1181 // Revoke monitors' biases in all scopes | |
1182 while (!cvf->is_top()) { | |
1183 collect_monitors(cvf, objects_to_revoke); | |
1184 cvf = compiledVFrame::cast(cvf->sender()); | |
1185 } | |
1186 collect_monitors(cvf, objects_to_revoke); | |
1187 | |
1188 if (SafepointSynchronize::is_at_safepoint()) { | |
1189 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1190 } else { | |
1191 BiasedLocking::revoke(objects_to_revoke); | |
1192 } | |
1193 } | |
1194 | |
1195 | |
1196 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
1197 if (!UseBiasedLocking) { | |
1198 return; | |
1199 } | |
1200 | |
1201 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
1202 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1203 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
1204 if (jt->has_last_Java_frame()) { | |
1205 StackFrameStream sfs(jt, true); | |
1206 while (!sfs.is_done()) { | |
1207 frame* cur = sfs.current(); | |
1208 if (cb->contains(cur->pc())) { | |
1209 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
1210 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1211 // Revoke monitors' biases in all scopes | |
1212 while (!cvf->is_top()) { | |
1213 collect_monitors(cvf, objects_to_revoke); | |
1214 cvf = compiledVFrame::cast(cvf->sender()); | |
1215 } | |
1216 collect_monitors(cvf, objects_to_revoke); | |
1217 } | |
1218 sfs.next(); | |
1219 } | |
1220 } | |
1221 } | |
1222 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1223 } | |
1224 | |
1225 | |
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1226 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
0 | 1227 assert(fr.can_be_deoptimized(), "checking frame type"); |
1228 | |
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1229 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
0 | 1230 |
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|
1231 if (LogCompilation && xtty != NULL) { |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1232 nmethod* nm = fr.cb()->as_nmethod_or_null(); |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
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|
1233 assert(nm != NULL, "only nmethods can deopt"); |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1234 |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
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18133
diff
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|
1235 ttyLocker ttyl; |
18712
37a5c6b8b930
Log deopt before deoptimizing the frame
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18392
diff
changeset
|
1236 xtty->begin_head("deoptimized thread='" UINTX_FORMAT "'", thread->osthread()->thread_id()); |
18225
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
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|
1237 nm->log_identity(xtty); |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
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|
1238 xtty->end_head(); |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
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|
1239 for (ScopeDesc* sd = nm->scope_desc_at(fr.pc()); ; sd = sd->sender()) { |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
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|
1240 xtty->begin_elem("jvms bci='%d'", sd->bci()); |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
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|
1241 xtty->method(sd->method()); |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
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1242 xtty->end_elem(); |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
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|
1243 if (sd->is_top()) break; |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
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|
1244 } |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1245 xtty->tail("deoptimized"); |
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
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|
1246 } |
18712
37a5c6b8b930
Log deopt before deoptimizing the frame
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
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diff
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|
1247 |
37a5c6b8b930
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Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
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diff
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|
1248 // Patch the nmethod so that when execution returns to it we will |
37a5c6b8b930
Log deopt before deoptimizing the frame
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18392
diff
changeset
|
1249 // deopt the execution state and return to the interpreter. |
37a5c6b8b930
Log deopt before deoptimizing the frame
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18392
diff
changeset
|
1250 fr.deoptimize(thread); |
0 | 1251 } |
1252 | |
1253 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map) { | |
13188
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1254 deoptimize(thread, fr, map, Reason_constraint); |
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1255 } |
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1256 |
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1257 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
0 | 1258 // Deoptimize only if the frame comes from compile code. |
1259 // Do not deoptimize the frame which is already patched | |
1260 // during the execution of the loops below. | |
1261 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
1262 return; | |
1263 } | |
1264 ResourceMark rm; | |
1265 DeoptimizationMarker dm; | |
1266 if (UseBiasedLocking) { | |
1267 revoke_biases_of_monitors(thread, fr, map); | |
1268 } | |
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1269 deoptimize_single_frame(thread, fr, reason); |
0 | 1270 |
1271 } | |
1272 | |
1273 | |
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1274 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
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parents:
1814
diff
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|
1275 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
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parents:
1814
diff
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|
1276 "can only deoptimize other thread at a safepoint"); |
0 | 1277 // Compute frame and register map based on thread and sp. |
1278 RegisterMap reg_map(thread, UseBiasedLocking); | |
1279 frame fr = thread->last_frame(); | |
1280 while (fr.id() != id) { | |
1281 fr = fr.sender(®_map); | |
1282 } | |
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
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|
1283 deoptimize(thread, fr, ®_map, reason); |
0 | 1284 } |
1285 | |
1286 | |
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1287 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
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diff
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|
1288 if (thread == Thread::current()) { |
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1289 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
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|
1290 } else { |
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1291 VM_DeoptimizeFrame deopt(thread, id, reason); |
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
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diff
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|
1292 VMThread::execute(&deopt); |
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6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
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|
1293 } |
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|
1294 } |
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|
1295 |
13188
6b2d8d20ecbd
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Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1296 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id) { |
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
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diff
changeset
|
1297 deoptimize_frame(thread, id, Reason_constraint); |
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
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|
1298 } |
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|
1299 |
0 | 1300 // JVMTI PopFrame support |
1301 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
1302 { | |
1303 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
1304 } | |
1305 JRT_END | |
1306 | |
1307 | |
4978
99d3d8a72252
More ifdef GRAAL usage.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
4970
diff
changeset
|
1308 #if defined(COMPILER2) || defined(SHARK) || defined(GRAAL) |
0 | 1309 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
1310 // in case of an unresolved klass entry, load the class. | |
1311 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1312 Klass* tk = constant_pool->klass_at(index, CHECK); |
0 | 1313 return; |
1314 } | |
1315 | |
1316 if (!constant_pool->tag_at(index).is_symbol()) return; | |
1317 | |
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1318 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
|
1319 Symbol* symbol = constant_pool->symbol_at(index); |
0 | 1320 |
1321 // class name? | |
1322 if (symbol->byte_at(0) != '(') { | |
6940
18fb7da42534
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coleenp
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|
1323 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1324 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
1325 return; | |
1326 } | |
1327 | |
1328 // then it must be a signature! | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1329 ResourceMark rm(THREAD); |
0 | 1330 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
1331 if (ss.is_object()) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1332 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
|
1333 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1334 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
1335 } | |
1336 } | |
1337 } | |
1338 | |
1339 | |
1340 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
1341 EXCEPTION_MARK; | |
1342 load_class_by_index(constant_pool, index, THREAD); | |
1343 if (HAS_PENDING_EXCEPTION) { | |
1344 // Exception happened during classloading. We ignore the exception here, since it | |
14230
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1345 // is going to be rethrown since the current activation is going to be deoptimized and |
0 | 1346 // the interpreter will re-execute the bytecode. |
1347 CLEAR_PENDING_EXCEPTION; | |
14230
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1348 // Class loading called java code which may have caused a stack |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1349 // overflow. If the exception was thrown right before the return |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1350 // to the runtime the stack is no longer guarded. Reguard the |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1351 // stack otherwise if we return to the uncommon trap blob and the |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1352 // stack bang causes a stack overflow we crash. |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1353 assert(THREAD->is_Java_thread(), "only a java thread can be here"); |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1354 JavaThread* thread = (JavaThread*)THREAD; |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1355 bool guard_pages_enabled = thread->stack_yellow_zone_enabled(); |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1356 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1357 assert(guard_pages_enabled, "stack banging in uncommon trap blob may cause crash"); |
0 | 1358 } |
1359 } | |
1360 | |
1361 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
1362 HandleMark hm; | |
1363 | |
1364 // uncommon_trap() is called at the beginning of the uncommon trap | |
1365 // handler. Note this fact before we start generating temporary frames | |
1366 // that can confuse an asynchronous stack walker. This counter is | |
1367 // decremented at the end of unpack_frames(). | |
1368 thread->inc_in_deopt_handler(); | |
1369 | |
1370 // 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
|
1371 #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
|
1372 // (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
|
1373 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
|
1374 #else |
0 | 1375 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
|
1376 #endif |
0 | 1377 frame stub_frame = thread->last_frame(); |
1378 frame fr = stub_frame.sender(®_map); | |
1379 // Make sure the calling nmethod is not getting deoptimized and removed | |
1380 // before we are done with it. | |
1381 nmethodLocker nl(fr.pc()); | |
1382 | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
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4777
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|
1383 // 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
|
1384 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
|
1385 trap_request, fr.pc(), fr.pc() - fr.cb()->code_begin()); |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
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|
1386 |
0 | 1387 { |
1388 ResourceMark rm; | |
1389 | |
1390 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
1391 revoke_biases_of_monitors(thread, fr, ®_map); | |
1392 | |
1393 DeoptReason reason = trap_request_reason(trap_request); | |
1394 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
|
1395 #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
|
1396 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
|
1397 #endif |
0 | 1398 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 |
1399 | |
1400 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
1401 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1402 | |
1403 nmethod* nm = cvf->code(); | |
1404 | |
1405 ScopeDesc* trap_scope = cvf->scope(); | |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
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|
1406 |
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1407 if (TraceDeoptimization) { |
19670
1f95f91dd1d6
Add ttyLocker to TraceDeoptimization output
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18712
diff
changeset
|
1408 ttyLocker ttyl; |
15652
3397e82e2f35
fix printing of pc in deopt message
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
15582
diff
changeset
|
1409 tty->print_cr(" bci=%d pc=" INTPTR_FORMAT ", 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
|
1410 #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
|
1411 , debug_id |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1412 #endif |
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1413 ); |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1414 } |
0 | 1415 |
1416 methodHandle trap_method = trap_scope->method(); | |
1417 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
|
1418 #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
|
1419 oop speculation = thread->pending_failed_speculation(); |
13714
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1420 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
|
1421 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
|
1422 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
|
1423 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
|
1424 if (TraceDeoptimization || TraceUncollectedSpeculations) { |
13642
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1425 if (SpeculationLog::lastFailed(speculation_log) != NULL) { |
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1426 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
|
1427 } |
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1428 } |
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
|
1429 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
|
1430 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
|
1431 } |
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
|
1432 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
|
1433 } 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
|
1434 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
|
1435 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
|
1436 } |
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
|
1437 } |
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
|
1438 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
|
1439 } 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
|
1440 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
|
1441 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
|
1442 } |
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
|
1443 } |
13714
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1444 } else { |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1445 #ifdef ASSERT |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1446 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
|
1447 #endif |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1448 } |
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
|
1449 |
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1450 if (trap_bci == SynchronizationEntryBCI) { |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1451 trap_bci = 0; |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1452 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
|
1453 } |
16535
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1454 |
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1455 if (reason == Deoptimization::Reason_transfer_to_interpreter) { |
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1456 thread->set_pending_transfer_to_interpreter(true); |
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1457 } |
13220
2b43fcc68add
Put _pending_deoptimization and _pending_monitorenter under ifdef GRAAL
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13216
diff
changeset
|
1458 #endif |
16535
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1459 |
2142 | 1460 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
0 | 1461 |
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
|
1462 if (trap_scope->rethrow_exception()) { |
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
1463 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
|
1464 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
|
1465 } |
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
|
1466 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
|
1467 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
|
1468 ScopeValue* topOfStack = expressions->top(); |
8151
b8f261ba79c6
Minimize diff to plain HotSpot version.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8124
diff
changeset
|
1469 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
|
1470 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
|
1471 } |
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
|
1472 |
0 | 1473 // Record this event in the histogram. |
1474 gather_statistics(reason, action, trap_bc); | |
1475 | |
1476 // Ensure that we can record deopt. history: | |
17780 | 1477 // Need MDO to record RTM code generation state. |
1478 bool create_if_missing = ProfileTraps RTM_OPT_ONLY( || UseRTMLocking ); | |
0 | 1479 |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1480 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
|
1481 #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
|
1482 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
|
1483 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
|
1484 } else { |
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1485 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
|
1486 } |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1487 #else |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1488 profiled_method = trap_method; |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1489 #endif |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1490 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1491 MethodData* trap_mdo = |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1492 get_method_data(thread, profiled_method, create_if_missing); |
0 | 1493 |
7193
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1494 // Log a message |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1495 Events::log_deopt_message(thread, "Uncommon trap: reason=%s action=%s pc=" INTPTR_FORMAT " method=%s @ %d", |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1496 trap_reason_name(reason), trap_action_name(action), fr.pc(), |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1497 trap_method->name_and_sig_as_C_string(), trap_bci); |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1498 |
0 | 1499 // Print a bunch of diagnostics, if requested. |
1500 if (TraceDeoptimization || LogCompilation) { | |
1501 ResourceMark rm; | |
1502 ttyLocker ttyl; | |
1503 char buf[100]; | |
1504 if (xtty != NULL) { | |
1505 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
1506 os::current_thread_id(), | |
1507 format_trap_request(buf, sizeof(buf), trap_request)); | |
1508 nm->log_identity(xtty); | |
1509 } | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1510 Symbol* class_name = NULL; |
0 | 1511 bool unresolved = false; |
1512 if (unloaded_class_index >= 0) { | |
1513 constantPoolHandle constants (THREAD, trap_method->constants()); | |
1514 if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1515 class_name = constants->klass_name_at(unloaded_class_index); |
0 | 1516 unresolved = true; |
1517 if (xtty != NULL) | |
1518 xtty->print(" unresolved='1'"); | |
1519 } else if (constants->tag_at(unloaded_class_index).is_symbol()) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1520 class_name = constants->symbol_at(unloaded_class_index); |
0 | 1521 } |
1522 if (xtty != NULL) | |
1523 xtty->name(class_name); | |
1524 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1525 if (xtty != NULL && trap_mdo != NULL) { |
0 | 1526 // Dump the relevant MDO state. |
1527 // This is the deopt count for the current reason, any previous | |
1528 // reasons or recompiles seen at this point. | |
1529 int dcnt = trap_mdo->trap_count(reason); | |
1530 if (dcnt != 0) | |
1531 xtty->print(" count='%d'", dcnt); | |
1532 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
1533 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
1534 if (dos != 0) { | |
1535 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
1536 if (trap_state_is_recompiled(dos)) { | |
1537 int recnt2 = trap_mdo->overflow_recompile_count(); | |
1538 if (recnt2 != 0) | |
1539 xtty->print(" recompiles2='%d'", recnt2); | |
1540 } | |
1541 } | |
1542 } | |
1543 if (xtty != NULL) { | |
1544 xtty->stamp(); | |
1545 xtty->end_head(); | |
1546 } | |
1547 if (TraceDeoptimization) { // make noise on the tty | |
1548 tty->print("Uncommon trap occurred in"); | |
1549 nm->method()->print_short_name(tty); | |
19961
71040f48cc34
TraceDeoptimization: print compiler and compile_id
Gilles Duboscq <gilles.m.duboscq@oracle.com>
parents:
19670
diff
changeset
|
1550 tty->print(" compiler=%s compile_id=%d", nm->compiler() == NULL ? "" : nm->compiler()->name(), nm->compile_id()); |
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1551 #ifdef GRAAL |
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1552 oop installedCode = nm->graal_installed_code(); |
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1553 if (installedCode != NULL) { |
15161
2c940b1a48d8
Convert InstalledCode from an interface into an abstract class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
15104
diff
changeset
|
1554 oop installedCodeName = NULL; |
16401
347915b8cea8
Move name from HotSpotNmethod to InstalledCode to have a name again for truffle nmethods.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
16025
diff
changeset
|
1555 if (installedCode->is_a(InstalledCode::klass())) { |
347915b8cea8
Move name from HotSpotNmethod to InstalledCode to have a name again for truffle nmethods.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
16025
diff
changeset
|
1556 installedCodeName = InstalledCode::name(installedCode); |
15161
2c940b1a48d8
Convert InstalledCode from an interface into an abstract class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
15104
diff
changeset
|
1557 } |
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1558 if (installedCodeName != NULL) { |
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1559 tty->print(" (Graal: installedCodeName=%s) ", java_lang_String::as_utf8_string(installedCodeName)); |
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1560 } else { |
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1561 tty->print(" (Graal: installed code has no name) "); |
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1562 } |
12561
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1563 } else if (nm->is_compiled_by_graal()) { |
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1564 tty->print(" (Graal: no installed code) "); |
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1565 } |
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1566 #endif //GRAAL |
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1567 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d" GRAAL_ONLY(" debug_id=%d"), |
0 | 1568 fr.pc(), |
6843 | 1569 os::current_thread_id(), |
0 | 1570 trap_reason_name(reason), |
1571 trap_action_name(action), | |
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1572 unloaded_class_index |
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1573 #ifdef GRAAL |
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|
1574 , debug_id |
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1575 #endif |
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1576 ); |
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1577 if (class_name != NULL) { |
0 | 1578 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
1579 class_name->print_symbol_on(tty); | |
1580 } | |
1581 tty->cr(); | |
1582 } | |
1583 if (xtty != NULL) { | |
1584 // Log the precise location of the trap. | |
1585 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
1586 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
1587 xtty->method(sd->method()); | |
1588 xtty->end_elem(); | |
1589 if (sd->is_top()) break; | |
1590 } | |
1591 xtty->tail("uncommon_trap"); | |
1592 } | |
1593 } | |
1594 // (End diagnostic printout.) | |
1595 | |
1596 // Load class if necessary | |
1597 if (unloaded_class_index >= 0) { | |
1598 constantPoolHandle constants(THREAD, trap_method->constants()); | |
1599 load_class_by_index(constants, unloaded_class_index); | |
1600 } | |
1601 | |
1602 // Flush the nmethod if necessary and desirable. | |
1603 // | |
1604 // We need to avoid situations where we are re-flushing the nmethod | |
1605 // because of a hot deoptimization site. Repeated flushes at the same | |
1606 // point need to be detected by the compiler and avoided. If the compiler | |
1607 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
1608 // module must take measures to avoid an infinite cycle of recompilation | |
1609 // and deoptimization. There are several such measures: | |
1610 // | |
1611 // 1. If a recompilation is ordered a second time at some site X | |
1612 // and for the same reason R, the action is adjusted to 'reinterpret', | |
1613 // to give the interpreter time to exercise the method more thoroughly. | |
1614 // If this happens, the method's overflow_recompile_count is incremented. | |
1615 // | |
1616 // 2. If the compiler fails to reduce the deoptimization rate, then | |
1617 // the method's overflow_recompile_count will begin to exceed the set | |
1618 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
1619 // is adjusted to 'make_not_compilable', and the method is abandoned | |
1620 // to the interpreter. This is a performance hit for hot methods, | |
1621 // but is better than a disastrous infinite cycle of recompilations. | |
1622 // (Actually, only the method containing the site X is abandoned.) | |
1623 // | |
1624 // 3. In parallel with the previous measures, if the total number of | |
1625 // recompilations of a method exceeds the much larger set limit | |
1626 // PerMethodRecompilationCutoff, the method is abandoned. | |
1627 // This should only happen if the method is very large and has | |
1628 // many "lukewarm" deoptimizations. The code which enforces this | |
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1629 // limit is elsewhere (class nmethod, class Method). |
0 | 1630 // |
1631 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
1632 // to recompile at each bytecode independently of the per-BCI cutoff. | |
1633 // | |
1634 // The decision to update code is up to the compiler, and is encoded | |
1635 // in the Action_xxx code. If the compiler requests Action_none | |
1636 // no trap state is changed, no compiled code is changed, and the | |
1637 // computation suffers along in the interpreter. | |
1638 // | |
1639 // The other action codes specify various tactics for decompilation | |
1640 // and recompilation. Action_maybe_recompile is the loosest, and | |
1641 // allows the compiled code to stay around until enough traps are seen, | |
1642 // and until the compiler gets around to recompiling the trapping method. | |
1643 // | |
1644 // The other actions cause immediate removal of the present code. | |
1645 | |
1646 bool update_trap_state = true; | |
1647 bool make_not_entrant = false; | |
1648 bool make_not_compilable = false; | |
1783 | 1649 bool reprofile = false; |
0 | 1650 switch (action) { |
1651 case Action_none: | |
1652 // Keep the old code. | |
1653 update_trap_state = false; | |
1654 break; | |
1655 case Action_maybe_recompile: | |
1656 // Do not need to invalidate the present code, but we can | |
1657 // initiate another | |
1658 // Start compiler without (necessarily) invalidating the nmethod. | |
1659 // The system will tolerate the old code, but new code should be | |
1660 // generated when possible. | |
1661 break; | |
1662 case Action_reinterpret: | |
1663 // Go back into the interpreter for a while, and then consider | |
1664 // recompiling form scratch. | |
1665 make_not_entrant = true; | |
1666 // Reset invocation counter for outer most method. | |
1667 // This will allow the interpreter to exercise the bytecodes | |
1668 // for a while before recompiling. | |
1669 // By contrast, Action_make_not_entrant is immediate. | |
1670 // | |
1671 // Note that the compiler will track null_check, null_assert, | |
1672 // range_check, and class_check events and log them as if they | |
1673 // had been traps taken from compiled code. This will update | |
1674 // the MDO trap history so that the next compilation will | |
1675 // properly detect hot trap sites. | |
1783 | 1676 reprofile = true; |
0 | 1677 break; |
1678 case Action_make_not_entrant: | |
1679 // Request immediate recompilation, and get rid of the old code. | |
1680 // Make them not entrant, so next time they are called they get | |
1681 // recompiled. Unloaded classes are loaded now so recompile before next | |
1682 // time they are called. Same for uninitialized. The interpreter will | |
1683 // link the missing class, if any. | |
1684 make_not_entrant = true; | |
1685 break; | |
1686 case Action_make_not_compilable: | |
1687 // Give up on compiling this method at all. | |
1688 make_not_entrant = true; | |
1689 make_not_compilable = true; | |
1690 break; | |
1691 default: | |
1692 ShouldNotReachHere(); | |
1693 } | |
1694 | |
1695 // Setting +ProfileTraps fixes the following, on all platforms: | |
1696 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
1697 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
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1698 // recompile relies on a MethodData* to record heroic opt failures. |
0 | 1699 |
1700 // Whether the interpreter is producing MDO data or not, we also need | |
1701 // to use the MDO to detect hot deoptimization points and control | |
1702 // aggressive optimization. | |
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1703 bool inc_recompile_count = false; |
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1704 ProfileData* pdata = NULL; |
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1705 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
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1706 assert(trap_mdo == get_method_data(thread, profiled_method, false), "sanity"); |
0 | 1707 uint this_trap_count = 0; |
1708 bool maybe_prior_trap = false; | |
1709 bool maybe_prior_recompile = false; | |
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1710 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
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1711 #ifdef GRAAL |
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1712 nm->is_compiled_by_graal() && nm->is_osr_method(), |
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1713 #endif |
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1714 nm->method(), |
0 | 1715 //outputs: |
1716 this_trap_count, | |
1717 maybe_prior_trap, | |
1718 maybe_prior_recompile); | |
1719 // Because the interpreter also counts null, div0, range, and class | |
1720 // checks, these traps from compiled code are double-counted. | |
1721 // This is harmless; it just means that the PerXTrapLimit values | |
1722 // are in effect a little smaller than they look. | |
1723 | |
1724 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
1725 if (per_bc_reason != Reason_none) { | |
1726 // Now take action based on the partially known per-BCI history. | |
1727 if (maybe_prior_trap | |
1728 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
1729 // If there are too many traps at this BCI, force a recompile. | |
1730 // This will allow the compiler to see the limit overflow, and | |
1731 // take corrective action, if possible. The compiler generally | |
1732 // does not use the exact PerBytecodeTrapLimit value, but instead | |
1733 // changes its tactics if it sees any traps at all. This provides | |
1734 // a little hysteresis, delaying a recompile until a trap happens | |
1735 // several times. | |
1736 // | |
1737 // Actually, since there is only one bit of counter per BCI, | |
1738 // the possible per-BCI counts are {0,1,(per-method count)}. | |
1739 // This produces accurate results if in fact there is only | |
1740 // one hot trap site, but begins to get fuzzy if there are | |
1741 // many sites. For example, if there are ten sites each | |
1742 // trapping two or more times, they each get the blame for | |
1743 // all of their traps. | |
1744 make_not_entrant = true; | |
1745 } | |
1746 | |
1747 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
1748 if (make_not_entrant && maybe_prior_recompile) { | |
1749 // More than one recompile at this point. | |
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1750 inc_recompile_count = maybe_prior_trap; |
0 | 1751 } |
1752 } else { | |
1753 // For reasons which are not recorded per-bytecode, we simply | |
1754 // force recompiles unconditionally. | |
1755 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
1756 make_not_entrant = true; | |
1757 } | |
1758 | |
1759 // Go back to the compiler if there are too many traps in this method. | |
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1760 if (this_trap_count >= per_method_trap_limit(reason)) { |
0 | 1761 // If there are too many traps in this method, force a recompile. |
1762 // This will allow the compiler to see the limit overflow, and | |
1763 // take corrective action, if possible. | |
1764 // (This condition is an unlikely backstop only, because the | |
1765 // PerBytecodeTrapLimit is more likely to take effect first, | |
1766 // if it is applicable.) | |
1767 make_not_entrant = true; | |
1768 } | |
1769 | |
1770 // Here's more hysteresis: If there has been a recompile at | |
1771 // this trap point already, run the method in the interpreter | |
1772 // for a while to exercise it more thoroughly. | |
1773 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
1783 | 1774 reprofile = true; |
0 | 1775 } |
1776 | |
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1777 } |
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1778 |
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1779 // Take requested actions on the method: |
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1780 |
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1781 // Recompile |
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1782 if (make_not_entrant) { |
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1783 if (!nm->make_not_entrant()) { |
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1784 return; // the call did not change nmethod's state |
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1785 } |
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1786 |
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1787 if (pdata != NULL) { |
0 | 1788 // Record the recompilation event, if any. |
1789 int tstate0 = pdata->trap_state(); | |
1790 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
1791 if (tstate1 != tstate0) | |
1792 pdata->set_trap_state(tstate1); | |
1793 } | |
17780 | 1794 |
1795 #if INCLUDE_RTM_OPT | |
1796 // Restart collecting RTM locking abort statistic if the method | |
1797 // is recompiled for a reason other than RTM state change. | |
1798 // Assume that in new recompiled code the statistic could be different, | |
1799 // for example, due to different inlining. | |
1800 if ((reason != Reason_rtm_state_change) && (trap_mdo != NULL) && | |
1801 UseRTMDeopt && (nm->rtm_state() != ProfileRTM)) { | |
1802 trap_mdo->atomic_set_rtm_state(ProfileRTM); | |
1803 } | |
1804 #endif | |
0 | 1805 } |
1806 | |
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1807 if (inc_recompile_count) { |
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1808 trap_mdo->inc_overflow_recompile_count(); |
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1809 if ((uint)trap_mdo->overflow_recompile_count() > |
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1810 (uint)PerBytecodeRecompilationCutoff) { |
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1811 // Give up on the method containing the bad BCI. |
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1812 if (trap_method() == nm->method()) { |
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1813 make_not_compilable = true; |
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1814 } else { |
7998 | 1815 trap_method->set_not_compilable(CompLevel_full_optimization, true, "overflow_recompile_count > PerBytecodeRecompilationCutoff"); |
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1816 // But give grace to the enclosing nm->method(). |
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1817 } |
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1818 } |
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1819 } |
0 | 1820 |
1783 | 1821 // Reprofile |
1822 if (reprofile) { | |
1823 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
0 | 1824 } |
1825 | |
1826 // Give up compiling | |
1783 | 1827 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
0 | 1828 assert(make_not_entrant, "consistent"); |
1783 | 1829 nm->method()->set_not_compilable(CompLevel_full_optimization); |
0 | 1830 } |
1831 | |
1832 } // Free marked resources | |
1833 | |
1834 } | |
1835 JRT_END | |
1836 | |
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1837 MethodData* |
0 | 1838 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
1839 bool create_if_missing) { | |
1840 Thread* THREAD = thread; | |
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1841 MethodData* mdo = m()->method_data(); |
0 | 1842 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
1843 // Build an MDO. Ignore errors like OutOfMemory; | |
1844 // that simply means we won't have an MDO to update. | |
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1845 Method::build_interpreter_method_data(m, THREAD); |
0 | 1846 if (HAS_PENDING_EXCEPTION) { |
1847 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
1848 CLEAR_PENDING_EXCEPTION; | |
1849 } | |
1850 mdo = m()->method_data(); | |
1851 } | |
1852 return mdo; | |
1853 } | |
1854 | |
1855 ProfileData* | |
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1856 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
0 | 1857 int trap_bci, |
1858 Deoptimization::DeoptReason reason, | |
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1859 bool update_total_trap_count, |
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1860 #ifdef GRAAL |
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1861 bool is_osr, |
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1862 #endif |
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1863 Method* compiled_method, |
0 | 1864 //outputs: |
1865 uint& ret_this_trap_count, | |
1866 bool& ret_maybe_prior_trap, | |
1867 bool& ret_maybe_prior_recompile) { | |
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1868 bool maybe_prior_trap = false; |
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1869 bool maybe_prior_recompile = false; |
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1870 uint this_trap_count = 0; |
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1871 if (update_total_trap_count) { |
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1872 uint idx = reason; |
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1873 #ifdef GRAAL |
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1874 if (is_osr) { |
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1875 idx += Reason_LIMIT; |
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1876 } |
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1877 #endif |
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1878 uint prior_trap_count = trap_mdo->trap_count(idx); |
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1879 this_trap_count = trap_mdo->inc_trap_count(idx); |
0 | 1880 |
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1881 // If the runtime cannot find a place to store trap history, |
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1882 // it is estimated based on the general condition of the method. |
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1883 // If the method has ever been recompiled, or has ever incurred |
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1884 // a trap with the present reason , then this BCI is assumed |
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1885 // (pessimistically) to be the culprit. |
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1886 maybe_prior_trap = (prior_trap_count != 0); |
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1887 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1888 } |
0 | 1889 ProfileData* pdata = NULL; |
1890 | |
1891 | |
1892 // For reasons which are recorded per bytecode, we check per-BCI data. | |
1893 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
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1894 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
0 | 1895 if (per_bc_reason != Reason_none) { |
1896 // Find the profile data for this BCI. If there isn't one, | |
1897 // try to allocate one from the MDO's set of spares. | |
1898 // This will let us detect a repeated trap at this point. | |
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1899 pdata = trap_mdo->allocate_bci_to_data(trap_bci, reason_is_speculate(reason) ? compiled_method : NULL); |
0 | 1900 |
1901 if (pdata != NULL) { | |
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1902 if (reason_is_speculate(reason) && !pdata->is_SpeculativeTrapData()) { |
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1903 if (LogCompilation && xtty != NULL) { |
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1904 ttyLocker ttyl; |
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1905 // no more room for speculative traps in this MDO |
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1906 xtty->elem("speculative_traps_oom"); |
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1907 } |
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1908 } |
0 | 1909 // Query the trap state of this profile datum. |
1910 int tstate0 = pdata->trap_state(); | |
1911 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
1912 maybe_prior_trap = false; | |
1913 if (!trap_state_is_recompiled(tstate0)) | |
1914 maybe_prior_recompile = false; | |
1915 | |
1916 // Update the trap state of this profile datum. | |
1917 int tstate1 = tstate0; | |
1918 // Record the reason. | |
1919 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
1920 // Store the updated state on the MDO, for next time. | |
1921 if (tstate1 != tstate0) | |
1922 pdata->set_trap_state(tstate1); | |
1923 } else { | |
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1924 if (LogCompilation && xtty != NULL) { |
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1925 ttyLocker ttyl; |
0 | 1926 // Missing MDP? Leave a small complaint in the log. |
1927 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1928 } |
0 | 1929 } |
1930 } | |
1931 | |
1932 // Return results: | |
1933 ret_this_trap_count = this_trap_count; | |
1934 ret_maybe_prior_trap = maybe_prior_trap; | |
1935 ret_maybe_prior_recompile = maybe_prior_recompile; | |
1936 return pdata; | |
1937 } | |
1938 | |
1939 void | |
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1940 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 1941 ResourceMark rm; |
1942 // Ignored outputs: | |
1943 uint ignore_this_trap_count; | |
1944 bool ignore_maybe_prior_trap; | |
1945 bool ignore_maybe_prior_recompile; | |
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1946 assert(!reason_is_speculate(reason), "reason speculate only used by compiler"); |
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1947 // Graal uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
5130 | 1948 bool update_total_counts = GRAAL_ONLY(false) NOT_GRAAL(true); |
0 | 1949 query_update_method_data(trap_mdo, trap_bci, |
1950 (DeoptReason)reason, | |
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1951 update_total_counts, |
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1952 #ifdef GRAAL |
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1953 false, |
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1954 #endif |
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1955 NULL, |
0 | 1956 ignore_this_trap_count, |
1957 ignore_maybe_prior_trap, | |
1958 ignore_maybe_prior_recompile); | |
1959 } | |
1960 | |
1961 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request) { | |
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1962 if (TraceDeoptimization) { |
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1963 tty->print("Uncommon trap "); |
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1964 } |
0 | 1965 // Still in Java no safepoints |
1966 { | |
1967 // This enters VM and may safepoint | |
1968 uncommon_trap_inner(thread, trap_request); | |
1969 } | |
1970 return fetch_unroll_info_helper(thread); | |
1971 } | |
1972 | |
1973 // Local derived constants. | |
1974 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
1975 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
1976 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
1977 | |
1978 //---------------------------trap_state_reason--------------------------------- | |
1979 Deoptimization::DeoptReason | |
1980 Deoptimization::trap_state_reason(int trap_state) { | |
1981 // This assert provides the link between the width of DataLayout::trap_bits | |
1982 // and the encoding of "recorded" reasons. It ensures there are enough | |
1983 // bits to store all needed reasons in the per-BCI MDO profile. | |
1984 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
1985 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1986 trap_state -= recompile_bit; | |
1987 if (trap_state == DS_REASON_MASK) { | |
1988 return Reason_many; | |
1989 } else { | |
1990 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
1991 return (DeoptReason)trap_state; | |
1992 } | |
1993 } | |
1994 //-------------------------trap_state_has_reason------------------------------- | |
1995 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
1996 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
1997 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
1998 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1999 trap_state -= recompile_bit; | |
2000 if (trap_state == DS_REASON_MASK) { | |
2001 return -1; // true, unspecifically (bottom of state lattice) | |
2002 } else if (trap_state == reason) { | |
2003 return 1; // true, definitely | |
2004 } else if (trap_state == 0) { | |
2005 return 0; // false, definitely (top of state lattice) | |
2006 } else { | |
2007 return 0; // false, definitely | |
2008 } | |
2009 } | |
2010 //-------------------------trap_state_add_reason------------------------------- | |
2011 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
2012 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
2013 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
2014 trap_state -= recompile_bit; | |
2015 if (trap_state == DS_REASON_MASK) { | |
2016 return trap_state + recompile_bit; // already at state lattice bottom | |
2017 } else if (trap_state == reason) { | |
2018 return trap_state + recompile_bit; // the condition is already true | |
2019 } else if (trap_state == 0) { | |
2020 return reason + recompile_bit; // no condition has yet been true | |
2021 } else { | |
2022 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
2023 } | |
2024 } | |
2025 //-----------------------trap_state_is_recompiled------------------------------ | |
2026 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
2027 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
2028 } | |
2029 //-----------------------trap_state_set_recompiled----------------------------- | |
2030 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
2031 if (z) return trap_state | DS_RECOMPILE_BIT; | |
2032 else return trap_state & ~DS_RECOMPILE_BIT; | |
2033 } | |
2034 //---------------------------format_trap_state--------------------------------- | |
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2035 // This is used for debugging and diagnostics, including LogFile output. |
0 | 2036 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, |
2037 int trap_state) { | |
2038 DeoptReason reason = trap_state_reason(trap_state); | |
2039 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
2040 // Re-encode the state from its decoded components. | |
2041 int decoded_state = 0; | |
2042 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
2043 decoded_state = trap_state_add_reason(decoded_state, reason); | |
2044 if (recomp_flag) | |
2045 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
2046 // If the state re-encodes properly, format it symbolically. | |
2047 // Because this routine is used for debugging and diagnostics, | |
2048 // be robust even if the state is a strange value. | |
2049 size_t len; | |
2050 if (decoded_state != trap_state) { | |
2051 // Random buggy state that doesn't decode?? | |
2052 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
2053 } else { | |
2054 len = jio_snprintf(buf, buflen, "%s%s", | |
2055 trap_reason_name(reason), | |
2056 recomp_flag ? " recompiled" : ""); | |
2057 } | |
2058 if (len >= buflen) | |
2059 buf[buflen-1] = '\0'; | |
2060 return buf; | |
2061 } | |
2062 | |
2063 | |
2064 //--------------------------------statics-------------------------------------- | |
2065 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
2066 = Deoptimization::Action_reinterpret; | |
2067 const char* Deoptimization::_trap_reason_name[Reason_LIMIT] = { | |
2068 // Note: Keep this in sync. with enum DeoptReason. | |
2069 "none", | |
2070 "null_check", | |
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2071 "null_assert" GRAAL_ONLY("_or_unreached0"), |
0 | 2072 "range_check", |
2073 "class_check", | |
2074 "array_check", | |
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2075 "intrinsic" GRAAL_ONLY("_or_type_checked_inlining"), |
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2076 "bimorphic" GRAAL_ONLY("_or_optimized_type_check"), |
0 | 2077 "unloaded", |
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2078 "uninitialized", |
0 | 2079 "unreached", |
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2080 "unhandled", |
0 | 2081 "constraint", |
2082 "div0_check", | |
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2083 "age", |
3345 | 2084 "predicate", |
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2085 "loop_limit_check", |
17780 | 2086 "speculate_class_check", |
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2087 "rtm_state_change", |
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2088 #ifdef GRAAL |
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2089 "aliasing", |
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2090 "transfer_to_interpreter", |
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2091 "not_compiled_exception_handler", |
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2092 "unresolved", |
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2093 "jsr_mismatch" |
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2094 #endif |
0 | 2095 }; |
2096 const char* Deoptimization::_trap_action_name[Action_LIMIT] = { | |
2097 // Note: Keep this in sync. with enum DeoptAction. | |
2098 "none", | |
2099 "maybe_recompile", | |
2100 "reinterpret", | |
2101 "make_not_entrant", | |
2102 "make_not_compilable" | |
2103 }; | |
2104 | |
2105 const char* Deoptimization::trap_reason_name(int reason) { | |
2106 if (reason == Reason_many) return "many"; | |
2107 if ((uint)reason < Reason_LIMIT) | |
2108 return _trap_reason_name[reason]; | |
2109 static char buf[20]; | |
2110 sprintf(buf, "reason%d", reason); | |
2111 return buf; | |
2112 } | |
2113 const char* Deoptimization::trap_action_name(int action) { | |
2114 if ((uint)action < Action_LIMIT) | |
2115 return _trap_action_name[action]; | |
2116 static char buf[20]; | |
2117 sprintf(buf, "action%d", action); | |
2118 return buf; | |
2119 } | |
2120 | |
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2121 // This is used for debugging and diagnostics, including LogFile output. |
0 | 2122 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, |
2123 int trap_request) { | |
2124 jint unloaded_class_index = trap_request_index(trap_request); | |
2125 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
2126 const char* action = trap_action_name(trap_request_action(trap_request)); | |
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2127 #ifdef GRAAL |
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2128 int debug_id = trap_request_debug_id(trap_request); |
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2129 #endif |
0 | 2130 size_t len; |
2131 if (unloaded_class_index < 0) { | |
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2132 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'" GRAAL_ONLY(" debug_id='%d'"), |
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2133 reason, action |
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2134 #ifdef GRAAL |
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2135 ,debug_id |
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2136 #endif |
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Gilles Duboscq <duboscq@ssw.jku.at>
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2137 ); |
0 | 2138 } else { |
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deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
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13642
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2139 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'" GRAAL_ONLY(" debug_id='%d'"), |
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2140 reason, action, unloaded_class_index |
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diff
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2141 #ifdef GRAAL |
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5a9afbf72714
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Gilles Duboscq <duboscq@ssw.jku.at>
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diff
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2142 ,debug_id |
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2143 #endif |
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2144 ); |
0 | 2145 } |
2146 if (len >= buflen) | |
2147 buf[buflen-1] = '\0'; | |
2148 return buf; | |
2149 } | |
2150 | |
2151 juint Deoptimization::_deoptimization_hist | |
2152 [Deoptimization::Reason_LIMIT] | |
2153 [1 + Deoptimization::Action_LIMIT] | |
2154 [Deoptimization::BC_CASE_LIMIT] | |
2155 = {0}; | |
2156 | |
2157 enum { | |
2158 LSB_BITS = 8, | |
2159 LSB_MASK = right_n_bits(LSB_BITS) | |
2160 }; | |
2161 | |
2162 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2163 Bytecodes::Code bc) { | |
2164 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
2165 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
2166 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
2167 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
2168 juint* cases = _deoptimization_hist[reason][1+action]; | |
2169 juint* bc_counter_addr = NULL; | |
2170 juint bc_counter = 0; | |
2171 // Look for an unused counter, or an exact match to this BC. | |
2172 if (bc != Bytecodes::_illegal) { | |
2173 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
2174 juint* counter_addr = &cases[bc_case]; | |
2175 juint counter = *counter_addr; | |
2176 if ((counter == 0 && bc_counter_addr == NULL) | |
2177 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
2178 // this counter is either free or is already devoted to this BC | |
2179 bc_counter_addr = counter_addr; | |
2180 bc_counter = counter | bc; | |
2181 } | |
2182 } | |
2183 } | |
2184 if (bc_counter_addr == NULL) { | |
2185 // Overflow, or no given bytecode. | |
2186 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
2187 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
2188 } | |
2189 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
2190 } | |
2191 | |
2192 jint Deoptimization::total_deoptimization_count() { | |
2193 return _deoptimization_hist[Reason_none][0][0]; | |
2194 } | |
2195 | |
2196 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
2197 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
2198 return _deoptimization_hist[reason][0][0]; | |
2199 } | |
2200 | |
2201 void Deoptimization::print_statistics() { | |
2202 juint total = total_deoptimization_count(); | |
2203 juint account = total; | |
2204 if (total != 0) { | |
2205 ttyLocker ttyl; | |
2206 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
2207 tty->print_cr("Deoptimization traps recorded:"); | |
2208 #define PRINT_STAT_LINE(name, r) \ | |
2209 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
2210 PRINT_STAT_LINE("total", total); | |
2211 // For each non-zero entry in the histogram, print the reason, | |
2212 // the action, and (if specifically known) the type of bytecode. | |
2213 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
2214 for (int action = 0; action < Action_LIMIT; action++) { | |
2215 juint* cases = _deoptimization_hist[reason][1+action]; | |
2216 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
2217 juint counter = cases[bc_case]; | |
2218 if (counter != 0) { | |
2219 char name[1*K]; | |
2220 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
2221 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
2222 bc = Bytecodes::_illegal; | |
2223 sprintf(name, "%s/%s/%s", | |
2224 trap_reason_name(reason), | |
2225 trap_action_name(action), | |
2226 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
2227 juint r = counter >> LSB_BITS; | |
2228 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
2229 account -= r; | |
2230 } | |
2231 } | |
2232 } | |
2233 } | |
2234 if (account != 0) { | |
2235 PRINT_STAT_LINE("unaccounted", account); | |
2236 } | |
2237 #undef PRINT_STAT_LINE | |
2238 if (xtty != NULL) xtty->tail("statistics"); | |
2239 } | |
2240 } | |
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2241 #else // COMPILER2 || SHARK || GRAAL |
0 | 2242 |
2243 | |
2244 // Stubs for C1 only system. | |
2245 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
2246 return false; | |
2247 } | |
2248 | |
2249 const char* Deoptimization::trap_reason_name(int reason) { | |
2250 return "unknown"; | |
2251 } | |
2252 | |
2253 void Deoptimization::print_statistics() { | |
2254 // no output | |
2255 } | |
2256 | |
2257 void | |
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2258 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 2259 // no udpate |
2260 } | |
2261 | |
2262 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
2263 return 0; | |
2264 } | |
2265 | |
2266 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2267 Bytecodes::Code bc) { | |
2268 // no update | |
2269 } | |
2270 | |
2271 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
2272 int trap_state) { | |
2273 jio_snprintf(buf, buflen, "#%d", trap_state); | |
2274 return buf; | |
2275 } | |
2276 | |
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2277 #endif // COMPILER2 || SHARK || GRAAL |