Mercurial > hg > truffle
annotate src/share/vm/runtime/deoptimization.cpp @ 12584:bc0ed539018f
UnsafeArrayCopySnippets: use DirectObjectStoreNode again for kind object. add location identity to DirectObjectStoreNode.
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Thu, 24 Oct 2013 18:34:27 +0200 |
parents | d1f8d0538b79 |
children | bca33c3135de |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "code/debugInfoRec.hpp" | |
28 #include "code/nmethod.hpp" | |
29 #include "code/pcDesc.hpp" | |
30 #include "code/scopeDesc.hpp" | |
31 #include "interpreter/bytecode.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "memory/allocation.inline.hpp" | |
35 #include "memory/oopFactory.hpp" | |
36 #include "memory/resourceArea.hpp" | |
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37 #include "oops/method.hpp" |
1972 | 38 #include "oops/oop.inline.hpp" |
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39 #include "oops/fieldStreams.hpp" |
1972 | 40 #include "prims/jvmtiThreadState.hpp" |
41 #include "runtime/biasedLocking.hpp" | |
42 #include "runtime/compilationPolicy.hpp" | |
43 #include "runtime/deoptimization.hpp" | |
44 #include "runtime/interfaceSupport.hpp" | |
45 #include "runtime/sharedRuntime.hpp" | |
46 #include "runtime/signature.hpp" | |
47 #include "runtime/stubRoutines.hpp" | |
48 #include "runtime/thread.hpp" | |
49 #include "runtime/vframe.hpp" | |
50 #include "runtime/vframeArray.hpp" | |
51 #include "runtime/vframe_hp.hpp" | |
52 #include "utilities/events.hpp" | |
53 #include "utilities/xmlstream.hpp" | |
54 #ifdef TARGET_ARCH_x86 | |
55 # include "vmreg_x86.inline.hpp" | |
56 #endif | |
57 #ifdef TARGET_ARCH_sparc | |
58 # include "vmreg_sparc.inline.hpp" | |
59 #endif | |
60 #ifdef TARGET_ARCH_zero | |
61 # include "vmreg_zero.inline.hpp" | |
62 #endif | |
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63 #ifdef TARGET_ARCH_arm |
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64 # include "vmreg_arm.inline.hpp" |
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65 #endif |
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66 #ifdef TARGET_ARCH_ppc |
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67 # include "vmreg_ppc.inline.hpp" |
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68 #endif |
1972 | 69 #ifdef COMPILER2 |
70 #ifdef TARGET_ARCH_MODEL_x86_32 | |
71 # include "adfiles/ad_x86_32.hpp" | |
72 #endif | |
73 #ifdef TARGET_ARCH_MODEL_x86_64 | |
74 # include "adfiles/ad_x86_64.hpp" | |
75 #endif | |
76 #ifdef TARGET_ARCH_MODEL_sparc | |
77 # include "adfiles/ad_sparc.hpp" | |
78 #endif | |
79 #ifdef TARGET_ARCH_MODEL_zero | |
80 # include "adfiles/ad_zero.hpp" | |
81 #endif | |
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82 #ifdef TARGET_ARCH_MODEL_arm |
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83 # include "adfiles/ad_arm.hpp" |
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84 #endif |
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85 #ifdef TARGET_ARCH_MODEL_ppc |
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86 # include "adfiles/ad_ppc.hpp" |
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87 #endif |
1972 | 88 #endif |
0 | 89 |
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90 #ifdef GRAAL |
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91 #include "graal/graalCompiler.hpp" |
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92 #include "graal/graalJavaAccess.hpp" |
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93 #endif |
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94 |
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95 |
0 | 96 bool DeoptimizationMarker::_is_active = false; |
97 | |
98 Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, | |
99 int caller_adjustment, | |
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100 int caller_actual_parameters, |
0 | 101 int number_of_frames, |
102 intptr_t* frame_sizes, | |
103 address* frame_pcs, | |
104 BasicType return_type) { | |
105 _size_of_deoptimized_frame = size_of_deoptimized_frame; | |
106 _caller_adjustment = caller_adjustment; | |
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107 _caller_actual_parameters = caller_actual_parameters; |
0 | 108 _number_of_frames = number_of_frames; |
109 _frame_sizes = frame_sizes; | |
110 _frame_pcs = frame_pcs; | |
6197 | 111 _register_block = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2, mtCompiler); |
0 | 112 _return_type = return_type; |
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113 _initial_info = 0; |
0 | 114 // PD (x86 only) |
115 _counter_temp = 0; | |
116 _unpack_kind = 0; | |
117 _sender_sp_temp = 0; | |
118 | |
119 _total_frame_sizes = size_of_frames(); | |
120 } | |
121 | |
122 | |
123 Deoptimization::UnrollBlock::~UnrollBlock() { | |
6197 | 124 FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes, mtCompiler); |
125 FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs, mtCompiler); | |
126 FREE_C_HEAP_ARRAY(intptr_t, _register_block, mtCompiler); | |
0 | 127 } |
128 | |
129 | |
130 intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const { | |
131 assert(register_number < RegisterMap::reg_count, "checking register number"); | |
132 return &_register_block[register_number * 2]; | |
133 } | |
134 | |
135 | |
136 | |
137 int Deoptimization::UnrollBlock::size_of_frames() const { | |
138 // Acount first for the adjustment of the initial frame | |
139 int result = _caller_adjustment; | |
140 for (int index = 0; index < number_of_frames(); index++) { | |
141 result += frame_sizes()[index]; | |
142 } | |
143 return result; | |
144 } | |
145 | |
146 | |
147 void Deoptimization::UnrollBlock::print() { | |
148 ttyLocker ttyl; | |
149 tty->print_cr("UnrollBlock"); | |
150 tty->print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame); | |
151 tty->print( " frame_sizes: "); | |
152 for (int index = 0; index < number_of_frames(); index++) { | |
153 tty->print("%d ", frame_sizes()[index]); | |
154 } | |
155 tty->cr(); | |
156 } | |
157 | |
158 | |
159 // In order to make fetch_unroll_info work properly with escape | |
160 // analysis, The method was changed from JRT_LEAF to JRT_BLOCK_ENTRY and | |
161 // ResetNoHandleMark and HandleMark were removed from it. The actual reallocation | |
162 // of previously eliminated objects occurs in realloc_objects, which is | |
163 // called from the method fetch_unroll_info_helper below. | |
164 JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* thread)) | |
165 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
166 // but makes the entry a little slower. There is however a little dance we have to | |
167 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
168 | |
169 // fetch_unroll_info() is called at the beginning of the deoptimization | |
170 // handler. Note this fact before we start generating temporary frames | |
171 // that can confuse an asynchronous stack walker. This counter is | |
172 // decremented at the end of unpack_frames(). | |
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173 if (TraceDeoptimization) { |
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174 tty->print_cr("Deoptimizing thread " INTPTR_FORMAT, thread); |
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175 } |
0 | 176 thread->inc_in_deopt_handler(); |
177 | |
178 return fetch_unroll_info_helper(thread); | |
179 JRT_END | |
180 | |
181 | |
182 // This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap) | |
183 Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* thread) { | |
184 | |
185 // Note: there is a safepoint safety issue here. No matter whether we enter | |
186 // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once | |
187 // the vframeArray is created. | |
188 // | |
189 | |
190 // Allocate our special deoptimization ResourceMark | |
191 DeoptResourceMark* dmark = new DeoptResourceMark(thread); | |
192 assert(thread->deopt_mark() == NULL, "Pending deopt!"); | |
193 thread->set_deopt_mark(dmark); | |
194 | |
195 frame stub_frame = thread->last_frame(); // Makes stack walkable as side effect | |
196 RegisterMap map(thread, true); | |
197 RegisterMap dummy_map(thread, false); | |
198 // Now get the deoptee with a valid map | |
199 frame deoptee = stub_frame.sender(&map); | |
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200 // Set the deoptee nmethod |
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201 assert(thread->deopt_nmethod() == NULL, "Pending deopt!"); |
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202 thread->set_deopt_nmethod(deoptee.cb()->as_nmethod_or_null()); |
0 | 203 |
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204 if (VerifyStack) { |
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205 thread->validate_frame_layout(); |
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206 } |
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207 |
0 | 208 // Create a growable array of VFrames where each VFrame represents an inlined |
209 // Java frame. This storage is allocated with the usual system arena. | |
210 assert(deoptee.is_compiled_frame(), "Wrong frame type"); | |
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211 |
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212 #ifdef GRAAL |
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213 nmethod* nm = (nmethod*) deoptee.cb(); |
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214 GraalCompiler* compiler = (GraalCompiler*) nm->compiler(); |
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215 for (jlong* p = nm->leaf_graph_ids_begin(); p != nm->leaf_graph_ids_end(); p++) { |
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216 compiler->deopt_leaf_graph(*p); |
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217 } |
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218 if (PrintDeoptimizationDetails) { |
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219 tty->print("leaf graph ids: "); |
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220 for (jlong* p = nm->leaf_graph_ids_begin(); p != nm->leaf_graph_ids_end(); p++) { |
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221 tty->print("%d ", *p); |
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222 } |
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223 tty->cr(); |
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224 } |
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225 #endif |
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226 |
0 | 227 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); |
228 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
229 while (!vf->is_top()) { | |
230 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
231 chunk->push(compiledVFrame::cast(vf)); | |
232 vf = vf->sender(); | |
233 } | |
234 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
235 chunk->push(compiledVFrame::cast(vf)); | |
236 | |
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237 #if defined(COMPILER2) || defined(GRAAL) |
0 | 238 // Reallocate the non-escaping objects and restore their fields. Then |
239 // relock objects if synchronization on them was eliminated. | |
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240 #ifdef COMPILER2 |
4777 | 241 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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242 if (EliminateAllocations) { |
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243 #endif // COMPILER2 |
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244 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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245 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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246 |
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247 // The flag return_oop() indicates call sites which return oop |
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248 // in compiled code. Such sites include java method calls, |
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249 // runtime calls (for example, used to allocate new objects/arrays |
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250 // on slow code path) and any other calls generated in compiled code. |
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251 // It is not guaranteed that we can get such information here only |
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252 // by analyzing bytecode in deoptimized frames. This is why this flag |
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253 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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254 bool save_oop_result = chunk->at(0)->scope()->return_oop(); |
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255 Handle return_value; |
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256 if (save_oop_result) { |
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257 // Reallocation may trigger GC. If deoptimization happened on return from |
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258 // call which returns oop we need to save it since it is not in oopmap. |
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259 oop result = deoptee.saved_oop_result(&map); |
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260 assert(result == NULL || result->is_oop(), "must be oop"); |
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261 return_value = Handle(thread, result); |
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262 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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263 if (TraceDeoptimization) { |
6843 | 264 ttyLocker ttyl; |
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265 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, (void *)result, thread); |
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266 } |
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267 } |
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268 bool reallocated = false; |
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269 if (objects != NULL) { |
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270 JRT_BLOCK |
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271 reallocated = realloc_objects(thread, &deoptee, objects, THREAD); |
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272 JRT_END |
0 | 273 } |
44
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274 if (reallocated) { |
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275 reassign_fields(&deoptee, &map, objects); |
0 | 276 #ifndef PRODUCT |
277 if (TraceDeoptimization) { | |
278 ttyLocker ttyl; | |
44
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279 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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280 print_objects(objects); |
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281 } |
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282 #endif |
44
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283 } |
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284 if (save_oop_result) { |
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285 // Restore result. |
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286 deoptee.set_saved_oop_result(&map, return_value()); |
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287 } |
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288 #ifdef COMPILER2 |
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289 } |
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290 if (EliminateLocks) { |
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291 #endif // COMPILER2 |
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292 #ifndef PRODUCT |
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293 bool first = true; |
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294 #endif |
44
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295 for (int i = 0; i < chunk->length(); i++) { |
83
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296 compiledVFrame* cvf = chunk->at(i); |
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297 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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298 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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299 if (monitors->is_nonempty()) { |
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300 relock_objects(monitors, thread); |
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301 #ifndef PRODUCT |
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302 if (PrintDeoptimizationDetails) { |
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303 ttyLocker ttyl; |
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304 for (int j = 0; j < monitors->length(); j++) { |
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305 MonitorInfo* mi = monitors->at(j); |
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306 if (mi->eliminated()) { |
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307 if (first) { |
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308 first = false; |
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309 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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310 } |
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311 tty->print_cr(" object <" INTPTR_FORMAT "> locked", (void *)mi->owner()); |
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312 } |
0 | 313 } |
314 } | |
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315 #endif // !PRODUCT |
0 | 316 } |
317 } | |
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318 #ifdef COMPILER2 |
0 | 319 } |
320 } | |
321 #endif // COMPILER2 | |
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322 #endif // COMPILER2 || GRAAL |
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323 |
0 | 324 // Ensure that no safepoint is taken after pointers have been stored |
325 // in fields of rematerialized objects. If a safepoint occurs from here on | |
326 // out the java state residing in the vframeArray will be missed. | |
327 No_Safepoint_Verifier no_safepoint; | |
328 | |
329 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk); | |
330 | |
331 assert(thread->vframe_array_head() == NULL, "Pending deopt!");; | |
332 thread->set_vframe_array_head(array); | |
333 | |
334 // Now that the vframeArray has been created if we have any deferred local writes | |
335 // added by jvmti then we can free up that structure as the data is now in the | |
336 // vframeArray | |
337 | |
338 if (thread->deferred_locals() != NULL) { | |
339 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals(); | |
340 int i = 0; | |
341 do { | |
342 // Because of inlining we could have multiple vframes for a single frame | |
343 // and several of the vframes could have deferred writes. Find them all. | |
344 if (list->at(i)->id() == array->original().id()) { | |
345 jvmtiDeferredLocalVariableSet* dlv = list->at(i); | |
346 list->remove_at(i); | |
347 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
348 delete dlv; | |
349 } else { | |
350 i++; | |
351 } | |
352 } while ( i < list->length() ); | |
353 if (list->length() == 0) { | |
354 thread->set_deferred_locals(NULL); | |
355 // free the list and elements back to C heap. | |
356 delete list; | |
357 } | |
358 | |
359 } | |
360 | |
1692 | 361 #ifndef SHARK |
0 | 362 // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
363 CodeBlob* cb = stub_frame.cb(); | |
364 // Verify we have the right vframeArray | |
365 assert(cb->frame_size() >= 0, "Unexpected frame size"); | |
366 intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); | |
367 | |
1204 | 368 // If the deopt call site is a MethodHandle invoke call site we have |
369 // to adjust the unpack_sp. | |
370 nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); | |
371 if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc())) | |
372 unpack_sp = deoptee.unextended_sp(); | |
373 | |
0 | 374 #ifdef ASSERT |
375 assert(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub(), "just checking"); | |
376 #endif | |
1692 | 377 #else |
378 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
379 #endif // !SHARK | |
380 | |
0 | 381 // This is a guarantee instead of an assert because if vframe doesn't match |
382 // we will unpack the wrong deoptimized frame and wind up in strange places | |
383 // where it will be very difficult to figure out what went wrong. Better | |
384 // to die an early death here than some very obscure death later when the | |
385 // trail is cold. | |
386 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
387 // in that it will fail to detect a problem when there is one. This needs | |
388 // more work in tiger timeframe. | |
389 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
390 | |
391 int number_of_frames = array->frames(); | |
392 | |
393 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
394 // virtual activation, which is the reverse of the elements in the vframes array. | |
6197 | 395 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
0 | 396 // +1 because we always have an interpreter return address for the final slot. |
6197 | 397 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
0 | 398 int popframe_extra_args = 0; |
399 // Create an interpreter return address for the stub to use as its return | |
400 // address so the skeletal frames are perfectly walkable | |
401 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
402 | |
403 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
404 // activation be put back on the expression stack of the caller for reexecution | |
405 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
406 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
407 } | |
408 | |
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409 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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410 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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411 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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412 // |
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413 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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414 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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415 |
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416 // It's possible that the number of paramters at the call site is |
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417 // different than number of arguments in the callee when method |
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418 // handles are used. If the caller is interpreted get the real |
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419 // value so that the proper amount of space can be added to it's |
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420 // frame. |
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421 bool caller_was_method_handle = false; |
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422 if (deopt_sender.is_interpreted_frame()) { |
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423 methodHandle method = deopt_sender.interpreter_frame_method(); |
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424 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
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425 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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426 // Method handle invokes may involve fairly arbitrary chains of |
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427 // calls so it's impossible to know how much actual space the |
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428 // caller has for locals. |
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429 caller_was_method_handle = true; |
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430 } |
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431 } |
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432 |
0 | 433 // |
434 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
435 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
436 // frame_sizes/frame_pcs[n] youngest frame (int) | |
437 // | |
438 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
439 // owns the space for the return address to it's caller). Confusing ain't it. | |
440 // | |
441 // The vframe array can address vframes with indices running from | |
442 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
443 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
444 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
445 // so things look a little strange in this loop. | |
446 // | |
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447 int callee_parameters = 0; |
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448 int callee_locals = 0; |
0 | 449 for (int index = 0; index < array->frames(); index++ ) { |
450 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
451 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
452 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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453 int caller_parms = callee_parameters; |
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454 if ((index == array->frames() - 1) && caller_was_method_handle) { |
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455 caller_parms = 0; |
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456 } |
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457 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(caller_parms, |
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458 callee_parameters, |
0 | 459 callee_locals, |
460 index == 0, | |
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461 index == array->frames() - 1, |
0 | 462 popframe_extra_args); |
463 // This pc doesn't have to be perfect just good enough to identify the frame | |
464 // as interpreted so the skeleton frame will be walkable | |
465 // The correct pc will be set when the skeleton frame is completely filled out | |
466 // The final pc we store in the loop is wrong and will be overwritten below | |
467 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
468 | |
469 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
470 callee_locals = array->element(index)->method()->max_locals(); | |
471 popframe_extra_args = 0; | |
472 } | |
473 | |
474 // Compute whether the root vframe returns a float or double value. | |
475 BasicType return_type; | |
476 { | |
477 HandleMark hm; | |
478 methodHandle method(thread, array->element(0)->method()); | |
2142 | 479 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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480 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
0 | 481 } |
482 | |
483 // Compute information for handling adapters and adjusting the frame size of the caller. | |
484 int caller_adjustment = 0; | |
485 | |
486 // Compute the amount the oldest interpreter frame will have to adjust | |
487 // its caller's stack by. If the caller is a compiled frame then | |
488 // we pretend that the callee has no parameters so that the | |
489 // extension counts for the full amount of locals and not just | |
490 // locals-parms. This is because without a c2i adapter the parm | |
491 // area as created by the compiled frame will not be usable by | |
492 // the interpreter. (Depending on the calling convention there | |
493 // may not even be enough space). | |
494 | |
495 // QQQ I'd rather see this pushed down into last_frame_adjust | |
496 // and have it take the sender (aka caller). | |
497 | |
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498 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
0 | 499 caller_adjustment = last_frame_adjust(0, callee_locals); |
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500 } else if (callee_locals > callee_parameters) { |
0 | 501 // The caller frame may need extending to accommodate |
502 // non-parameter locals of the first unpacked interpreted frame. | |
503 // Compute that adjustment. | |
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504 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
0 | 505 } |
506 | |
507 // If the sender is deoptimized the we must retrieve the address of the handler | |
508 // since the frame will "magically" show the original pc before the deopt | |
509 // and we'd undo the deopt. | |
510 | |
511 frame_pcs[0] = deopt_sender.raw_pc(); | |
512 | |
1692 | 513 #ifndef SHARK |
0 | 514 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
1692 | 515 #endif // SHARK |
0 | 516 |
517 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, | |
518 caller_adjustment * BytesPerWord, | |
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519 caller_was_method_handle ? 0 : callee_parameters, |
0 | 520 number_of_frames, |
521 frame_sizes, | |
522 frame_pcs, | |
523 return_type); | |
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524 // On some platforms, we need a way to pass some platform dependent |
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525 // information to the unpacking code so the skeletal frames come out |
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526 // correct (initial fp value, unextended sp, ...) |
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527 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
0 | 528 |
529 if (array->frames() > 1) { | |
530 if (VerifyStack && TraceDeoptimization) { | |
6843 | 531 ttyLocker ttyl; |
0 | 532 tty->print_cr("Deoptimizing method containing inlining"); |
533 } | |
534 } | |
535 | |
536 array->set_unroll_block(info); | |
537 return info; | |
538 } | |
539 | |
540 // Called to cleanup deoptimization data structures in normal case | |
541 // after unpacking to stack and when stack overflow error occurs | |
542 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
543 vframeArray *array) { | |
544 | |
545 // Get array if coming from exception | |
546 if (array == NULL) { | |
547 array = thread->vframe_array_head(); | |
548 } | |
549 thread->set_vframe_array_head(NULL); | |
550 | |
551 // Free the previous UnrollBlock | |
552 vframeArray* old_array = thread->vframe_array_last(); | |
553 thread->set_vframe_array_last(array); | |
554 | |
555 if (old_array != NULL) { | |
556 UnrollBlock* old_info = old_array->unroll_block(); | |
557 old_array->set_unroll_block(NULL); | |
558 delete old_info; | |
559 delete old_array; | |
560 } | |
561 | |
562 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
563 // inside the vframeArray (StackValueCollections) | |
564 | |
565 delete thread->deopt_mark(); | |
566 thread->set_deopt_mark(NULL); | |
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567 thread->set_deopt_nmethod(NULL); |
0 | 568 |
569 | |
570 if (JvmtiExport::can_pop_frame()) { | |
571 #ifndef CC_INTERP | |
572 // Regardless of whether we entered this routine with the pending | |
573 // popframe condition bit set, we should always clear it now | |
574 thread->clear_popframe_condition(); | |
575 #else | |
576 // C++ interpeter will clear has_pending_popframe when it enters | |
577 // with method_resume. For deopt_resume2 we clear it now. | |
578 if (thread->popframe_forcing_deopt_reexecution()) | |
579 thread->clear_popframe_condition(); | |
580 #endif /* CC_INTERP */ | |
581 } | |
582 | |
583 // unpack_frames() is called at the end of the deoptimization handler | |
584 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
585 // so that an asynchronous stack walker can work again. This counter is | |
586 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
587 // the beginning of uncommon_trap(). | |
588 thread->dec_in_deopt_handler(); | |
589 } | |
590 | |
591 | |
592 // Return BasicType of value being returned | |
593 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
594 | |
595 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
596 // allocate will be freed at the end of the routine. | |
597 | |
598 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
599 // but makes the entry a little slower. There is however a little dance we have to | |
600 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
601 ResetNoHandleMark rnhm; // No-op in release/product versions | |
602 HandleMark hm; | |
603 | |
604 frame stub_frame = thread->last_frame(); | |
605 | |
606 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
607 // must point to the vframeArray for the unpack frame. | |
608 vframeArray* array = thread->vframe_array_head(); | |
609 | |
610 #ifndef PRODUCT | |
611 if (TraceDeoptimization) { | |
6843 | 612 ttyLocker ttyl; |
0 | 613 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
614 } | |
615 #endif | |
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616 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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617 stub_frame.pc(), stub_frame.sp(), exec_mode); |
0 | 618 |
619 UnrollBlock* info = array->unroll_block(); | |
620 | |
621 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
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622 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
0 | 623 |
624 BasicType bt = info->return_type(); | |
625 | |
626 // If we have an exception pending, claim that the return type is an oop | |
627 // so the deopt_blob does not overwrite the exception_oop. | |
628 | |
629 if (exec_mode == Unpack_exception) | |
630 bt = T_OBJECT; | |
631 | |
632 // Cleanup thread deopt data | |
633 cleanup_deopt_info(thread, array); | |
634 | |
635 #ifndef PRODUCT | |
636 if (VerifyStack) { | |
637 ResourceMark res_mark; | |
638 | |
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639 thread->validate_frame_layout(); |
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640 |
0 | 641 // Verify that the just-unpacked frames match the interpreter's |
642 // notions of expression stack and locals | |
643 vframeArray* cur_array = thread->vframe_array_last(); | |
644 RegisterMap rm(thread, false); | |
645 rm.set_include_argument_oops(false); | |
646 bool is_top_frame = true; | |
647 int callee_size_of_parameters = 0; | |
648 int callee_max_locals = 0; | |
649 for (int i = 0; i < cur_array->frames(); i++) { | |
650 vframeArrayElement* el = cur_array->element(i); | |
651 frame* iframe = el->iframe(); | |
652 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
653 | |
654 // Get the oop map for this bci | |
655 InterpreterOopMap mask; | |
656 int cur_invoke_parameter_size = 0; | |
657 bool try_next_mask = false; | |
658 int next_mask_expression_stack_size = -1; | |
659 int top_frame_expression_stack_adjustment = 0; | |
660 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
661 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
662 BytecodeStream str(mh); | |
663 str.set_start(iframe->interpreter_frame_bci()); | |
664 int max_bci = mh->code_size(); | |
665 // Get to the next bytecode if possible | |
666 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
667 // Check to see if we can grab the number of outgoing arguments | |
668 // at an uncommon trap for an invoke (where the compiler | |
669 // generates debug info before the invoke has executed) | |
670 Bytecodes::Code cur_code = str.next(); | |
10390 | 671 if (cur_code == Bytecodes::_invokevirtual || |
672 cur_code == Bytecodes::_invokespecial || | |
673 cur_code == Bytecodes::_invokestatic || | |
674 cur_code == Bytecodes::_invokeinterface || | |
675 cur_code == Bytecodes::_invokedynamic) { | |
2142 | 676 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
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677 Symbol* signature = invoke.signature(); |
0 | 678 ArgumentSizeComputer asc(signature); |
679 cur_invoke_parameter_size = asc.size(); | |
10390 | 680 if (invoke.has_receiver()) { |
0 | 681 // Add in receiver |
682 ++cur_invoke_parameter_size; | |
683 } | |
10390 | 684 if (i != 0 && !invoke.is_invokedynamic() && MethodHandles::has_member_arg(invoke.klass(), invoke.name())) { |
685 callee_size_of_parameters++; | |
686 } | |
0 | 687 } |
688 if (str.bci() < max_bci) { | |
689 Bytecodes::Code bc = str.next(); | |
690 if (bc >= 0) { | |
691 // The interpreter oop map generator reports results before | |
692 // the current bytecode has executed except in the case of | |
693 // calls. It seems to be hard to tell whether the compiler | |
694 // has emitted debug information matching the "state before" | |
695 // a given bytecode or the state after, so we try both | |
696 switch (cur_code) { | |
697 case Bytecodes::_invokevirtual: | |
698 case Bytecodes::_invokespecial: | |
699 case Bytecodes::_invokestatic: | |
700 case Bytecodes::_invokeinterface: | |
10390 | 701 case Bytecodes::_invokedynamic: |
0 | 702 case Bytecodes::_athrow: |
703 break; | |
704 default: { | |
705 InterpreterOopMap next_mask; | |
706 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
707 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
708 // Need to subtract off the size of the result type of | |
709 // the bytecode because this is not described in the | |
710 // debug info but returned to the interpreter in the TOS | |
711 // caching register | |
712 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
713 if (bytecode_result_type != T_ILLEGAL) { | |
714 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
715 } | |
716 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
717 try_next_mask = true; | |
718 break; | |
719 } | |
720 } | |
721 } | |
722 } | |
723 | |
724 // Verify stack depth and oops in frame | |
725 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
726 if (!( | |
727 /* SPARC */ | |
728 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
729 /* x86 */ | |
730 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
731 (try_next_mask && | |
732 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
733 top_frame_expression_stack_adjustment))) || | |
734 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
735 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute) && | |
736 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) | |
737 )) { | |
738 ttyLocker ttyl; | |
739 | |
740 // Print out some information that will help us debug the problem | |
741 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
742 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
743 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
744 iframe->interpreter_frame_expression_stack_size()); | |
745 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
746 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
747 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
748 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
749 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
750 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
751 tty->print_cr(" exec_mode = %d", exec_mode); | |
752 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
753 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
754 tty->print_cr(" Interpreted frames:"); | |
755 for (int k = 0; k < cur_array->frames(); k++) { | |
756 vframeArrayElement* el = cur_array->element(k); | |
757 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
758 } | |
759 cur_array->print_on_2(tty); | |
760 guarantee(false, "wrong number of expression stack elements during deopt"); | |
761 } | |
762 VerifyOopClosure verify; | |
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763 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
0 | 764 callee_size_of_parameters = mh->size_of_parameters(); |
765 callee_max_locals = mh->max_locals(); | |
766 is_top_frame = false; | |
767 } | |
768 } | |
769 #endif /* !PRODUCT */ | |
770 | |
771 | |
772 return bt; | |
773 JRT_END | |
774 | |
775 | |
776 int Deoptimization::deoptimize_dependents() { | |
777 Threads::deoptimized_wrt_marked_nmethods(); | |
778 return 0; | |
779 } | |
780 | |
781 | |
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782 #if defined(COMPILER2) || defined(GRAAL) |
0 | 783 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
784 Handle pending_exception(thread->pending_exception()); | |
785 const char* exception_file = thread->exception_file(); | |
786 int exception_line = thread->exception_line(); | |
787 thread->clear_pending_exception(); | |
788 | |
789 for (int i = 0; i < objects->length(); i++) { | |
790 assert(objects->at(i)->is_object(), "invalid debug information"); | |
791 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
792 | |
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793 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 794 oop obj = NULL; |
795 | |
796 if (k->oop_is_instance()) { | |
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797 InstanceKlass* ik = InstanceKlass::cast(k()); |
0 | 798 obj = ik->allocate_instance(CHECK_(false)); |
799 } else if (k->oop_is_typeArray()) { | |
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800 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 801 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
802 int len = sv->field_size() / type2size[ak->element_type()]; | |
803 obj = ak->allocate(len, CHECK_(false)); | |
804 } else if (k->oop_is_objArray()) { | |
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805 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
0 | 806 obj = ak->allocate(sv->field_size(), CHECK_(false)); |
807 } | |
808 | |
809 assert(obj != NULL, "allocation failed"); | |
810 assert(sv->value().is_null(), "redundant reallocation"); | |
811 sv->set_value(obj); | |
812 } | |
813 | |
814 if (pending_exception.not_null()) { | |
815 thread->set_pending_exception(pending_exception(), exception_file, exception_line); | |
816 } | |
817 | |
818 return true; | |
819 } | |
820 | |
821 // restore elements of an eliminated type array | |
822 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
823 int index = 0; | |
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824 intptr_t val; |
0 | 825 |
826 for (int i = 0; i < sv->field_size(); i++) { | |
827 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
828 switch(type) { | |
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829 case T_LONG: case T_DOUBLE: { |
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830 assert(value->type() == T_INT, "Agreement."); |
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831 StackValue* low = |
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832 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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833 #ifdef _LP64 |
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834 jlong res = (jlong)low->get_int(); |
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835 #else |
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836 #ifdef SPARC |
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837 // For SPARC we have to swap high and low words. |
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838 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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839 #else |
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840 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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841 #endif //SPARC |
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842 #endif |
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843 obj->long_at_put(index, res); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
844 break; |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
845 } |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
846 |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
847 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
848 case T_INT: case T_FLOAT: // 4 bytes. |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
849 assert(value->type() == T_INT, "Agreement."); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
850 val = value->get_int(); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
851 obj->int_at_put(index, (jint)*((jint*)&val)); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
852 break; |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
853 |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
854 case T_SHORT: case T_CHAR: // 2 bytes |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
855 assert(value->type() == T_INT, "Agreement."); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
856 val = value->get_int(); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
857 obj->short_at_put(index, (jshort)*((jint*)&val)); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
858 break; |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
859 |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
860 case T_BOOLEAN: case T_BYTE: // 1 byte |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
861 assert(value->type() == T_INT, "Agreement."); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
862 val = value->get_int(); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
863 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
864 break; |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
865 |
0 | 866 default: |
867 ShouldNotReachHere(); | |
868 } | |
869 index++; | |
870 } | |
871 } | |
872 | |
12356
359f7e70ae7f
Reduce HotSpot diff and fix previous merge
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12355
diff
changeset
|
873 |
0 | 874 // restore fields of an eliminated object array |
875 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
876 for (int i = 0; i < sv->field_size(); i++) { | |
877 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
878 assert(value->type() == T_OBJECT, "object element expected"); | |
879 obj->obj_at_put(i, value->get_obj()()); | |
880 } | |
881 } | |
882 | |
7222 | 883 class ReassignedField { |
884 public: | |
885 int _offset; | |
886 BasicType _type; | |
887 public: | |
888 ReassignedField() { | |
889 _offset = 0; | |
890 _type = T_ILLEGAL; | |
891 } | |
892 }; | |
7137
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
changeset
|
893 |
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
changeset
|
894 int compare(ReassignedField* left, ReassignedField* right) { |
7222 | 895 return left->_offset - right->_offset; |
7137
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
changeset
|
896 } |
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
changeset
|
897 |
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
|
898 // Restore fields of an eliminated instance object using the same field order |
7084
9ba90252ce08
HotSpotResolvedJavaType is now the HotSpot implementation of ResolvedJavaType,
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
6948
diff
changeset
|
899 // returned by HotSpotResolvedObjectType.getInstanceFields(true) |
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
|
900 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj) { |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
901 if (klass->superklass() != NULL) { |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
902 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
903 } |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
904 |
7137
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
changeset
|
905 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
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
|
906 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
7137
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
changeset
|
907 if (!fs.access_flags().is_static()) { |
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
changeset
|
908 ReassignedField field; |
7222 | 909 field._offset = fs.offset(); |
910 field._type = FieldType::basic_type(fs.signature()); | |
7137
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
changeset
|
911 fields->append(field); |
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
|
912 } |
7137
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
changeset
|
913 } |
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
changeset
|
914 fields->sort(compare); |
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
changeset
|
915 for (int i = 0; i < fields->length(); i++) { |
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
|
916 intptr_t val; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
917 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(svIndex)); |
7222 | 918 int offset = fields->at(i)._offset; |
919 BasicType type = fields->at(i)._type; | |
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
|
920 switch (type) { |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
921 case T_OBJECT: case T_ARRAY: |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
922 assert(value->type() == T_OBJECT, "Agreement."); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
923 obj->obj_field_put(offset, value->get_obj()()); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
924 break; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
925 |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
926 case T_LONG: case T_DOUBLE: { |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
927 assert(value->type() == T_INT, "Agreement."); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
928 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
929 #ifdef _LP64 |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
930 jlong res = (jlong)low->get_int(); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
931 #else |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
932 #ifdef SPARC |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
933 // For SPARC we have to swap high and low words. |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
934 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
935 #else |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
936 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
937 #endif //SPARC |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
938 #endif |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
939 obj->long_field_put(offset, res); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
940 break; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
941 } |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
942 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
943 case T_INT: case T_FLOAT: // 4 bytes. |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
944 assert(value->type() == T_INT, "Agreement."); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
945 val = value->get_int(); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
946 obj->int_field_put(offset, (jint)*((jint*)&val)); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
947 break; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
948 |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
949 case T_SHORT: case T_CHAR: // 2 bytes |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
950 assert(value->type() == T_INT, "Agreement."); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
951 val = value->get_int(); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
952 obj->short_field_put(offset, (jshort)*((jint*)&val)); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
953 break; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
954 |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
955 case T_BOOLEAN: case T_BYTE: // 1 byte |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
956 assert(value->type() == T_INT, "Agreement."); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
957 val = value->get_int(); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
958 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
959 break; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
960 |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
961 default: |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
962 ShouldNotReachHere(); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
963 } |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
964 svIndex++; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
965 } |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
966 return svIndex; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
967 } |
0 | 968 |
969 // restore fields of all eliminated objects and arrays | |
970 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects) { | |
971 for (int i = 0; i < objects->length(); i++) { | |
972 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
973 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 974 Handle obj = sv->value(); |
975 assert(obj.not_null(), "reallocation was missed"); | |
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
976 if (PrintDeoptimizationDetails) { |
3134
4b63eb1197ca
Various fixes around escape analysis.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3090
diff
changeset
|
977 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
4b63eb1197ca
Various fixes around escape analysis.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3090
diff
changeset
|
978 } |
0 | 979 |
980 if (k->oop_is_instance()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
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|
981 InstanceKlass* ik = InstanceKlass::cast(k()); |
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982 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj()); |
0 | 983 } else if (k->oop_is_typeArray()) { |
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984 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 985 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
986 } else if (k->oop_is_objArray()) { | |
987 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
988 } | |
989 } | |
990 } | |
991 | |
992 | |
993 // relock objects for which synchronization was eliminated | |
83
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994 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread) { |
0 | 995 for (int i = 0; i < monitors->length(); i++) { |
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996 MonitorInfo* mon_info = monitors->at(i); |
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997 if (mon_info->eliminated()) { |
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998 assert(mon_info->owner() != NULL, "reallocation was missed"); |
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999 Handle obj = Handle(mon_info->owner()); |
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1000 markOop mark = obj->mark(); |
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1001 if (UseBiasedLocking && mark->has_bias_pattern()) { |
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1002 // New allocated objects may have the mark set to anonymously biased. |
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1003 // Also the deoptimized method may called methods with synchronization |
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1004 // where the thread-local object is bias locked to the current thread. |
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1005 assert(mark->is_biased_anonymously() || |
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1006 mark->biased_locker() == thread, "should be locked to current thread"); |
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1007 // Reset mark word to unbiased prototype. |
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1008 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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1009 obj->set_mark(unbiased_prototype); |
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1010 } |
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1011 BasicLock* lock = mon_info->lock(); |
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1012 ObjectSynchronizer::slow_enter(obj, lock, thread); |
0 | 1013 } |
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1014 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
0 | 1015 } |
1016 } | |
1017 | |
1018 | |
1019 #ifndef PRODUCT | |
1020 // print information about reallocated objects | |
1021 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects) { | |
1022 fieldDescriptor fd; | |
1023 | |
1024 for (int i = 0; i < objects->length(); i++) { | |
1025 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1026 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 1027 Handle obj = sv->value(); |
1028 | |
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1029 tty->print(" object <" INTPTR_FORMAT "> of type ", (void *)sv->value()()); |
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1030 k->print_value(); |
0 | 1031 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
1032 tty->cr(); | |
1033 | |
1034 if (Verbose) { | |
1035 k->oop_print_on(obj(), tty); | |
1036 } | |
1037 } | |
1038 } | |
1039 #endif | |
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1040 #endif // COMPILER2 || GRAAL |
0 | 1041 |
1042 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk) { | |
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1043 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
0 | 1044 |
1045 #ifndef PRODUCT | |
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1046 if (PrintDeoptimizationDetails) { |
0 | 1047 ttyLocker ttyl; |
1048 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
1049 fr.print_on(tty); | |
1050 tty->print_cr(" Virtual frames (innermost first):"); | |
1051 for (int index = 0; index < chunk->length(); index++) { | |
1052 compiledVFrame* vf = chunk->at(index); | |
1053 tty->print(" %2d - ", index); | |
1054 vf->print_value(); | |
1055 int bci = chunk->at(index)->raw_bci(); | |
1056 const char* code_name; | |
1057 if (bci == SynchronizationEntryBCI) { | |
1058 code_name = "sync entry"; | |
1059 } else { | |
2142 | 1060 Bytecodes::Code code = vf->method()->code_at(bci); |
0 | 1061 code_name = Bytecodes::name(code); |
1062 } | |
1063 tty->print(" - %s", code_name); | |
1064 tty->print_cr(" @ bci %d ", bci); | |
1065 if (Verbose) { | |
1066 vf->print(); | |
1067 tty->cr(); | |
1068 } | |
1069 } | |
1070 } | |
1071 #endif | |
1072 | |
1073 // Register map for next frame (used for stack crawl). We capture | |
1074 // the state of the deopt'ing frame's caller. Thus if we need to | |
1075 // stuff a C2I adapter we can properly fill in the callee-save | |
1076 // register locations. | |
1077 frame caller = fr.sender(reg_map); | |
1078 int frame_size = caller.sp() - fr.sp(); | |
1079 | |
1080 frame sender = caller; | |
1081 | |
1082 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
1083 // the vframeArray containing the unpacking information is allocated in the C heap. | |
1084 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
1085 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr); | |
1086 | |
1087 // Compare the vframeArray to the collected vframes | |
1088 assert(array->structural_compare(thread, chunk), "just checking"); | |
1089 | |
1090 #ifndef PRODUCT | |
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1091 if (PrintDeoptimizationDetails) { |
0 | 1092 ttyLocker ttyl; |
1093 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
1094 } | |
1095 #endif // PRODUCT | |
1096 | |
1097 return array; | |
1098 } | |
1099 | |
1100 | |
1101 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
1102 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
1103 for (int i = 0; i < monitors->length(); i++) { | |
1104 MonitorInfo* mon_info = monitors->at(i); | |
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1105 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
0 | 1106 objects_to_revoke->append(Handle(mon_info->owner())); |
1107 } | |
1108 } | |
1109 } | |
1110 | |
1111 | |
1112 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
1113 if (!UseBiasedLocking) { | |
1114 return; | |
1115 } | |
1116 | |
1117 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1118 | |
1119 // Unfortunately we don't have a RegisterMap available in most of | |
1120 // the places we want to call this routine so we need to walk the | |
1121 // stack again to update the register map. | |
1122 if (map == NULL || !map->update_map()) { | |
1123 StackFrameStream sfs(thread, true); | |
1124 bool found = false; | |
1125 while (!found && !sfs.is_done()) { | |
1126 frame* cur = sfs.current(); | |
1127 sfs.next(); | |
1128 found = cur->id() == fr.id(); | |
1129 } | |
1130 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
1131 map = sfs.register_map(); | |
1132 } | |
1133 | |
1134 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
1135 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1136 // Revoke monitors' biases in all scopes | |
1137 while (!cvf->is_top()) { | |
1138 collect_monitors(cvf, objects_to_revoke); | |
1139 cvf = compiledVFrame::cast(cvf->sender()); | |
1140 } | |
1141 collect_monitors(cvf, objects_to_revoke); | |
1142 | |
1143 if (SafepointSynchronize::is_at_safepoint()) { | |
1144 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1145 } else { | |
1146 BiasedLocking::revoke(objects_to_revoke); | |
1147 } | |
1148 } | |
1149 | |
1150 | |
1151 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
1152 if (!UseBiasedLocking) { | |
1153 return; | |
1154 } | |
1155 | |
1156 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
1157 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1158 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
1159 if (jt->has_last_Java_frame()) { | |
1160 StackFrameStream sfs(jt, true); | |
1161 while (!sfs.is_done()) { | |
1162 frame* cur = sfs.current(); | |
1163 if (cb->contains(cur->pc())) { | |
1164 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
1165 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1166 // Revoke monitors' biases in all scopes | |
1167 while (!cvf->is_top()) { | |
1168 collect_monitors(cvf, objects_to_revoke); | |
1169 cvf = compiledVFrame::cast(cvf->sender()); | |
1170 } | |
1171 collect_monitors(cvf, objects_to_revoke); | |
1172 } | |
1173 sfs.next(); | |
1174 } | |
1175 } | |
1176 } | |
1177 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1178 } | |
1179 | |
1180 | |
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1181 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
0 | 1182 assert(fr.can_be_deoptimized(), "checking frame type"); |
1183 | |
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1184 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
0 | 1185 |
1186 // Patch the nmethod so that when execution returns to it we will | |
1187 // deopt the execution state and return to the interpreter. | |
1188 fr.deoptimize(thread); | |
1189 } | |
1190 | |
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1191 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
0 | 1192 // Deoptimize only if the frame comes from compile code. |
1193 // Do not deoptimize the frame which is already patched | |
1194 // during the execution of the loops below. | |
1195 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
1196 return; | |
1197 } | |
1198 ResourceMark rm; | |
1199 DeoptimizationMarker dm; | |
1200 if (UseBiasedLocking) { | |
1201 revoke_biases_of_monitors(thread, fr, map); | |
1202 } | |
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1203 deoptimize_single_frame(thread, fr, reason); |
0 | 1204 |
1205 } | |
1206 | |
1207 | |
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1208 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1209 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
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1210 "can only deoptimize other thread at a safepoint"); |
0 | 1211 // Compute frame and register map based on thread and sp. |
1212 RegisterMap reg_map(thread, UseBiasedLocking); | |
1213 frame fr = thread->last_frame(); | |
1214 while (fr.id() != id) { | |
1215 fr = fr.sender(®_map); | |
1216 } | |
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1217 deoptimize(thread, fr, ®_map, reason); |
0 | 1218 } |
1219 | |
1220 | |
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1221 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1222 if (thread == Thread::current()) { |
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1223 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
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1224 } else { |
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1225 VM_DeoptimizeFrame deopt(thread, id, reason); |
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1226 VMThread::execute(&deopt); |
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1227 } |
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1228 } |
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1229 |
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1230 |
0 | 1231 // JVMTI PopFrame support |
1232 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
1233 { | |
1234 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
1235 } | |
1236 JRT_END | |
1237 | |
1238 | |
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1239 #if defined(COMPILER2) || defined(SHARK) || defined(GRAAL) |
0 | 1240 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
1241 // in case of an unresolved klass entry, load the class. | |
1242 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
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1243 Klass* tk = constant_pool->klass_at(index, CHECK); |
0 | 1244 return; |
1245 } | |
1246 | |
1247 if (!constant_pool->tag_at(index).is_symbol()) return; | |
1248 | |
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|
1249 Handle class_loader (THREAD, constant_pool->pool_holder()->class_loader()); |
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3582bf76420e
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2142
diff
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|
1250 Symbol* symbol = constant_pool->symbol_at(index); |
0 | 1251 |
1252 // class name? | |
1253 if (symbol->byte_at(0) != '(') { | |
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1254 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1255 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
1256 return; | |
1257 } | |
1258 | |
1259 // then it must be a signature! | |
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1260 ResourceMark rm(THREAD); |
0 | 1261 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
1262 if (ss.is_object()) { | |
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1263 Symbol* class_name = ss.as_symbol(CHECK); |
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1264 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1265 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
1266 } | |
1267 } | |
1268 } | |
1269 | |
1270 | |
1271 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
1272 EXCEPTION_MARK; | |
1273 load_class_by_index(constant_pool, index, THREAD); | |
1274 if (HAS_PENDING_EXCEPTION) { | |
1275 // Exception happened during classloading. We ignore the exception here, since it | |
1276 // is going to be rethrown since the current activation is going to be deoptimzied and | |
1277 // the interpreter will re-execute the bytecode. | |
1278 CLEAR_PENDING_EXCEPTION; | |
1279 } | |
1280 } | |
1281 | |
1282 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
1283 HandleMark hm; | |
1284 | |
1285 // uncommon_trap() is called at the beginning of the uncommon trap | |
1286 // handler. Note this fact before we start generating temporary frames | |
1287 // that can confuse an asynchronous stack walker. This counter is | |
1288 // decremented at the end of unpack_frames(). | |
1289 thread->inc_in_deopt_handler(); | |
1290 | |
1291 // We need to update the map if we have biased locking. | |
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1292 #ifdef GRAAL |
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changeset
|
1293 // (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
|
1294 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
|
1295 #else |
0 | 1296 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
|
1297 #endif |
0 | 1298 frame stub_frame = thread->last_frame(); |
1299 frame fr = stub_frame.sender(®_map); | |
1300 // Make sure the calling nmethod is not getting deoptimized and removed | |
1301 // before we are done with it. | |
1302 nmethodLocker nl(fr.pc()); | |
1303 | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4777
diff
changeset
|
1304 // 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
|
1305 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
|
1306 trap_request, fr.pc(), fr.pc() - fr.cb()->code_begin()); |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4777
diff
changeset
|
1307 |
0 | 1308 { |
1309 ResourceMark rm; | |
1310 | |
1311 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
1312 revoke_biases_of_monitors(thread, fr, ®_map); | |
1313 | |
1314 DeoptReason reason = trap_request_reason(trap_request); | |
1315 DeoptAction action = trap_request_action(trap_request); | |
1316 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 | |
1317 | |
1318 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
1319 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1320 | |
1321 nmethod* nm = cvf->code(); | |
1322 | |
1323 ScopeDesc* trap_scope = cvf->scope(); | |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1324 |
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1325 if (TraceDeoptimization) { |
4674
e1c053324210
changed TraceDeoptimization output
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4668
diff
changeset
|
1326 tty->print_cr(" bci=%d pc=%d, relative_pc=%d, method=%s", trap_scope->bci(), fr.pc(), fr.pc() - nm->code_begin(), trap_scope->method()->name()->as_C_string()); |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1327 } |
0 | 1328 |
1329 methodHandle trap_method = trap_scope->method(); | |
1330 int trap_bci = trap_scope->bci(); | |
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1331 if (trap_bci == SynchronizationEntryBCI) { |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1332 trap_bci = 0; |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1333 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
|
1334 } |
2142 | 1335 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
0 | 1336 |
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
|
1337 if (trap_scope->rethrow_exception()) { |
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
1338 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
|
1339 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
|
1340 } |
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
|
1341 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
|
1342 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
|
1343 ScopeValue* topOfStack = expressions->top(); |
8151
b8f261ba79c6
Minimize diff to plain HotSpot version.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8124
diff
changeset
|
1344 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
|
1345 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
|
1346 } |
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
|
1347 |
0 | 1348 // Record this event in the histogram. |
1349 gather_statistics(reason, action, trap_bc); | |
1350 | |
1351 // Ensure that we can record deopt. history: | |
1352 bool create_if_missing = ProfileTraps; | |
1353 | |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1354 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
|
1355 #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
|
1356 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
|
1357 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
|
1358 } else { |
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1359 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
|
1360 } |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1361 #else |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1362 profiled_method = trap_method; |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1363 #endif |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1364 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1365 MethodData* trap_mdo = |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1366 get_method_data(thread, profiled_method, create_if_missing); |
0 | 1367 |
7193
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1368 // Log a message |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1369 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
|
1370 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
|
1371 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
|
1372 |
0 | 1373 // Print a bunch of diagnostics, if requested. |
1374 if (TraceDeoptimization || LogCompilation) { | |
1375 ResourceMark rm; | |
1376 ttyLocker ttyl; | |
1377 char buf[100]; | |
1378 if (xtty != NULL) { | |
1379 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
1380 os::current_thread_id(), | |
1381 format_trap_request(buf, sizeof(buf), trap_request)); | |
1382 nm->log_identity(xtty); | |
1383 } | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1384 Symbol* class_name = NULL; |
0 | 1385 bool unresolved = false; |
1386 if (unloaded_class_index >= 0) { | |
1387 constantPoolHandle constants (THREAD, trap_method->constants()); | |
1388 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
|
1389 class_name = constants->klass_name_at(unloaded_class_index); |
0 | 1390 unresolved = true; |
1391 if (xtty != NULL) | |
1392 xtty->print(" unresolved='1'"); | |
1393 } 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
|
1394 class_name = constants->symbol_at(unloaded_class_index); |
0 | 1395 } |
1396 if (xtty != NULL) | |
1397 xtty->name(class_name); | |
1398 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1399 if (xtty != NULL && trap_mdo != NULL) { |
0 | 1400 // Dump the relevant MDO state. |
1401 // This is the deopt count for the current reason, any previous | |
1402 // reasons or recompiles seen at this point. | |
1403 int dcnt = trap_mdo->trap_count(reason); | |
1404 if (dcnt != 0) | |
1405 xtty->print(" count='%d'", dcnt); | |
1406 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
1407 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
1408 if (dos != 0) { | |
1409 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
1410 if (trap_state_is_recompiled(dos)) { | |
1411 int recnt2 = trap_mdo->overflow_recompile_count(); | |
1412 if (recnt2 != 0) | |
1413 xtty->print(" recompiles2='%d'", recnt2); | |
1414 } | |
1415 } | |
1416 } | |
1417 if (xtty != NULL) { | |
1418 xtty->stamp(); | |
1419 xtty->end_head(); | |
1420 } | |
1421 if (TraceDeoptimization) { // make noise on the tty | |
1422 tty->print("Uncommon trap occurred in"); | |
1423 nm->method()->print_short_name(tty); | |
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
|
1424 #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
|
1425 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
|
1426 if (installedCode != 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
|
1427 oop installedCodeName = HotSpotNmethod::name(installedCode); |
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
|
1428 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
|
1429 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
|
1430 } 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
|
1431 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
|
1432 } |
12561
d1f8d0538b79
Only print "Graal: no installed code" in deopt if nmethod is compiled by Graal
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12517
diff
changeset
|
1433 } else if (nm->is_compiled_by_graal()) { |
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
|
1434 tty->print(" (Graal: no 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
|
1435 } |
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
|
1436 #endif //GRAAL |
6843 | 1437 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d", |
0 | 1438 fr.pc(), |
6843 | 1439 os::current_thread_id(), |
0 | 1440 trap_reason_name(reason), |
1441 trap_action_name(action), | |
1442 unloaded_class_index); | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1443 if (class_name != NULL) { |
0 | 1444 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
1445 class_name->print_symbol_on(tty); | |
1446 } | |
1447 tty->cr(); | |
1448 } | |
1449 if (xtty != NULL) { | |
1450 // Log the precise location of the trap. | |
1451 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
1452 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
1453 xtty->method(sd->method()); | |
1454 xtty->end_elem(); | |
1455 if (sd->is_top()) break; | |
1456 } | |
1457 xtty->tail("uncommon_trap"); | |
1458 } | |
1459 } | |
1460 // (End diagnostic printout.) | |
1461 | |
1462 // Load class if necessary | |
1463 if (unloaded_class_index >= 0) { | |
1464 constantPoolHandle constants(THREAD, trap_method->constants()); | |
1465 load_class_by_index(constants, unloaded_class_index); | |
1466 } | |
1467 | |
1468 // Flush the nmethod if necessary and desirable. | |
1469 // | |
1470 // We need to avoid situations where we are re-flushing the nmethod | |
1471 // because of a hot deoptimization site. Repeated flushes at the same | |
1472 // point need to be detected by the compiler and avoided. If the compiler | |
1473 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
1474 // module must take measures to avoid an infinite cycle of recompilation | |
1475 // and deoptimization. There are several such measures: | |
1476 // | |
1477 // 1. If a recompilation is ordered a second time at some site X | |
1478 // and for the same reason R, the action is adjusted to 'reinterpret', | |
1479 // to give the interpreter time to exercise the method more thoroughly. | |
1480 // If this happens, the method's overflow_recompile_count is incremented. | |
1481 // | |
1482 // 2. If the compiler fails to reduce the deoptimization rate, then | |
1483 // the method's overflow_recompile_count will begin to exceed the set | |
1484 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
1485 // is adjusted to 'make_not_compilable', and the method is abandoned | |
1486 // to the interpreter. This is a performance hit for hot methods, | |
1487 // but is better than a disastrous infinite cycle of recompilations. | |
1488 // (Actually, only the method containing the site X is abandoned.) | |
1489 // | |
1490 // 3. In parallel with the previous measures, if the total number of | |
1491 // recompilations of a method exceeds the much larger set limit | |
1492 // PerMethodRecompilationCutoff, the method is abandoned. | |
1493 // This should only happen if the method is very large and has | |
1494 // many "lukewarm" deoptimizations. The code which enforces this | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1495 // limit is elsewhere (class nmethod, class Method). |
0 | 1496 // |
1497 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
1498 // to recompile at each bytecode independently of the per-BCI cutoff. | |
1499 // | |
1500 // The decision to update code is up to the compiler, and is encoded | |
1501 // in the Action_xxx code. If the compiler requests Action_none | |
1502 // no trap state is changed, no compiled code is changed, and the | |
1503 // computation suffers along in the interpreter. | |
1504 // | |
1505 // The other action codes specify various tactics for decompilation | |
1506 // and recompilation. Action_maybe_recompile is the loosest, and | |
1507 // allows the compiled code to stay around until enough traps are seen, | |
1508 // and until the compiler gets around to recompiling the trapping method. | |
1509 // | |
1510 // The other actions cause immediate removal of the present code. | |
1511 | |
1512 bool update_trap_state = true; | |
1513 bool make_not_entrant = false; | |
1514 bool make_not_compilable = false; | |
1783 | 1515 bool reprofile = false; |
0 | 1516 switch (action) { |
1517 case Action_none: | |
1518 // Keep the old code. | |
1519 update_trap_state = false; | |
1520 break; | |
1521 case Action_maybe_recompile: | |
1522 // Do not need to invalidate the present code, but we can | |
1523 // initiate another | |
1524 // Start compiler without (necessarily) invalidating the nmethod. | |
1525 // The system will tolerate the old code, but new code should be | |
1526 // generated when possible. | |
1527 break; | |
1528 case Action_reinterpret: | |
1529 // Go back into the interpreter for a while, and then consider | |
1530 // recompiling form scratch. | |
1531 make_not_entrant = true; | |
1532 // Reset invocation counter for outer most method. | |
1533 // This will allow the interpreter to exercise the bytecodes | |
1534 // for a while before recompiling. | |
1535 // By contrast, Action_make_not_entrant is immediate. | |
1536 // | |
1537 // Note that the compiler will track null_check, null_assert, | |
1538 // range_check, and class_check events and log them as if they | |
1539 // had been traps taken from compiled code. This will update | |
1540 // the MDO trap history so that the next compilation will | |
1541 // properly detect hot trap sites. | |
1783 | 1542 reprofile = true; |
0 | 1543 break; |
1544 case Action_make_not_entrant: | |
1545 // Request immediate recompilation, and get rid of the old code. | |
1546 // Make them not entrant, so next time they are called they get | |
1547 // recompiled. Unloaded classes are loaded now so recompile before next | |
1548 // time they are called. Same for uninitialized. The interpreter will | |
1549 // link the missing class, if any. | |
1550 make_not_entrant = true; | |
1551 break; | |
1552 case Action_make_not_compilable: | |
1553 // Give up on compiling this method at all. | |
1554 make_not_entrant = true; | |
1555 make_not_compilable = true; | |
1556 break; | |
1557 default: | |
1558 ShouldNotReachHere(); | |
1559 } | |
1560 | |
1561 // Setting +ProfileTraps fixes the following, on all platforms: | |
1562 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
1563 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
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1564 // recompile relies on a MethodData* to record heroic opt failures. |
0 | 1565 |
1566 // Whether the interpreter is producing MDO data or not, we also need | |
1567 // to use the MDO to detect hot deoptimization points and control | |
1568 // aggressive optimization. | |
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1569 bool inc_recompile_count = false; |
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1570 ProfileData* pdata = NULL; |
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1571 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
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1572 assert(trap_mdo == get_method_data(thread, profiled_method, false), "sanity"); |
0 | 1573 uint this_trap_count = 0; |
1574 bool maybe_prior_trap = false; | |
1575 bool maybe_prior_recompile = false; | |
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1576 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
0 | 1577 //outputs: |
1578 this_trap_count, | |
1579 maybe_prior_trap, | |
1580 maybe_prior_recompile); | |
1581 // Because the interpreter also counts null, div0, range, and class | |
1582 // checks, these traps from compiled code are double-counted. | |
1583 // This is harmless; it just means that the PerXTrapLimit values | |
1584 // are in effect a little smaller than they look. | |
1585 | |
1586 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
1587 if (per_bc_reason != Reason_none) { | |
1588 // Now take action based on the partially known per-BCI history. | |
1589 if (maybe_prior_trap | |
1590 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
1591 // If there are too many traps at this BCI, force a recompile. | |
1592 // This will allow the compiler to see the limit overflow, and | |
1593 // take corrective action, if possible. The compiler generally | |
1594 // does not use the exact PerBytecodeTrapLimit value, but instead | |
1595 // changes its tactics if it sees any traps at all. This provides | |
1596 // a little hysteresis, delaying a recompile until a trap happens | |
1597 // several times. | |
1598 // | |
1599 // Actually, since there is only one bit of counter per BCI, | |
1600 // the possible per-BCI counts are {0,1,(per-method count)}. | |
1601 // This produces accurate results if in fact there is only | |
1602 // one hot trap site, but begins to get fuzzy if there are | |
1603 // many sites. For example, if there are ten sites each | |
1604 // trapping two or more times, they each get the blame for | |
1605 // all of their traps. | |
1606 make_not_entrant = true; | |
1607 } | |
1608 | |
1609 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
1610 if (make_not_entrant && maybe_prior_recompile) { | |
1611 // More than one recompile at this point. | |
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1612 inc_recompile_count = maybe_prior_trap; |
0 | 1613 } |
1614 } else { | |
1615 // For reasons which are not recorded per-bytecode, we simply | |
1616 // force recompiles unconditionally. | |
1617 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
1618 make_not_entrant = true; | |
1619 } | |
1620 | |
1621 // Go back to the compiler if there are too many traps in this method. | |
1622 if (this_trap_count >= (uint)PerMethodTrapLimit) { | |
1623 // If there are too many traps in this method, force a recompile. | |
1624 // This will allow the compiler to see the limit overflow, and | |
1625 // take corrective action, if possible. | |
1626 // (This condition is an unlikely backstop only, because the | |
1627 // PerBytecodeTrapLimit is more likely to take effect first, | |
1628 // if it is applicable.) | |
1629 make_not_entrant = true; | |
1630 } | |
1631 | |
1632 // Here's more hysteresis: If there has been a recompile at | |
1633 // this trap point already, run the method in the interpreter | |
1634 // for a while to exercise it more thoroughly. | |
1635 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
1783 | 1636 reprofile = true; |
0 | 1637 } |
1638 | |
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1639 } |
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1640 |
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1641 // Take requested actions on the method: |
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1642 |
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1643 // Recompile |
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1644 if (make_not_entrant) { |
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1645 if (!nm->make_not_entrant()) { |
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1646 return; // the call did not change nmethod's state |
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1647 } |
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1648 |
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1649 if (pdata != NULL) { |
0 | 1650 // Record the recompilation event, if any. |
1651 int tstate0 = pdata->trap_state(); | |
1652 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
1653 if (tstate1 != tstate0) | |
1654 pdata->set_trap_state(tstate1); | |
1655 } | |
1656 } | |
1657 | |
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1658 if (inc_recompile_count) { |
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1659 trap_mdo->inc_overflow_recompile_count(); |
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1660 if ((uint)trap_mdo->overflow_recompile_count() > |
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1661 (uint)PerBytecodeRecompilationCutoff) { |
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1662 // Give up on the method containing the bad BCI. |
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1663 if (trap_method() == nm->method()) { |
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1664 make_not_compilable = true; |
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1665 } else { |
7998 | 1666 trap_method->set_not_compilable(CompLevel_full_optimization, true, "overflow_recompile_count > PerBytecodeRecompilationCutoff"); |
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1667 // But give grace to the enclosing nm->method(). |
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1668 } |
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1669 } |
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1670 } |
0 | 1671 |
1783 | 1672 // Reprofile |
1673 if (reprofile) { | |
1674 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
0 | 1675 } |
1676 | |
1677 // Give up compiling | |
1783 | 1678 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
0 | 1679 assert(make_not_entrant, "consistent"); |
1783 | 1680 nm->method()->set_not_compilable(CompLevel_full_optimization); |
0 | 1681 } |
1682 | |
1683 } // Free marked resources | |
1684 | |
1685 } | |
1686 JRT_END | |
1687 | |
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1688 MethodData* |
0 | 1689 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
1690 bool create_if_missing) { | |
1691 Thread* THREAD = thread; | |
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1692 MethodData* mdo = m()->method_data(); |
0 | 1693 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
1694 // Build an MDO. Ignore errors like OutOfMemory; | |
1695 // that simply means we won't have an MDO to update. | |
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1696 Method::build_interpreter_method_data(m, THREAD); |
0 | 1697 if (HAS_PENDING_EXCEPTION) { |
1698 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
1699 CLEAR_PENDING_EXCEPTION; | |
1700 } | |
1701 mdo = m()->method_data(); | |
1702 } | |
1703 return mdo; | |
1704 } | |
1705 | |
1706 ProfileData* | |
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1707 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
0 | 1708 int trap_bci, |
1709 Deoptimization::DeoptReason reason, | |
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1710 bool update_total_trap_count, |
0 | 1711 //outputs: |
1712 uint& ret_this_trap_count, | |
1713 bool& ret_maybe_prior_trap, | |
1714 bool& ret_maybe_prior_recompile) { | |
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1715 bool maybe_prior_trap = false; |
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1716 bool maybe_prior_recompile = false; |
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1717 uint this_trap_count = 0; |
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1718 if (update_total_trap_count) { |
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1719 uint prior_trap_count = trap_mdo->trap_count(reason); |
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1720 this_trap_count = trap_mdo->inc_trap_count(reason); |
0 | 1721 |
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1722 // If the runtime cannot find a place to store trap history, |
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1723 // it is estimated based on the general condition of the method. |
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1724 // If the method has ever been recompiled, or has ever incurred |
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1725 // a trap with the present reason , then this BCI is assumed |
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1726 // (pessimistically) to be the culprit. |
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1727 maybe_prior_trap = (prior_trap_count != 0); |
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1728 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1729 } |
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1730 ProfileData* pdata = NULL; |
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1731 |
0 | 1732 |
1733 // For reasons which are recorded per bytecode, we check per-BCI data. | |
1734 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
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1735 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
0 | 1736 if (per_bc_reason != Reason_none) { |
1737 // Find the profile data for this BCI. If there isn't one, | |
1738 // try to allocate one from the MDO's set of spares. | |
1739 // This will let us detect a repeated trap at this point. | |
1740 pdata = trap_mdo->allocate_bci_to_data(trap_bci); | |
1741 | |
1742 if (pdata != NULL) { | |
1743 // Query the trap state of this profile datum. | |
1744 int tstate0 = pdata->trap_state(); | |
1745 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
1746 maybe_prior_trap = false; | |
1747 if (!trap_state_is_recompiled(tstate0)) | |
1748 maybe_prior_recompile = false; | |
1749 | |
1750 // Update the trap state of this profile datum. | |
1751 int tstate1 = tstate0; | |
1752 // Record the reason. | |
1753 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
1754 // Store the updated state on the MDO, for next time. | |
1755 if (tstate1 != tstate0) | |
1756 pdata->set_trap_state(tstate1); | |
1757 } else { | |
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1758 if (LogCompilation && xtty != NULL) { |
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1759 ttyLocker ttyl; |
0 | 1760 // Missing MDP? Leave a small complaint in the log. |
1761 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1762 } |
0 | 1763 } |
1764 } | |
1765 | |
1766 // Return results: | |
1767 ret_this_trap_count = this_trap_count; | |
1768 ret_maybe_prior_trap = maybe_prior_trap; | |
1769 ret_maybe_prior_recompile = maybe_prior_recompile; | |
1770 return pdata; | |
1771 } | |
1772 | |
1773 void | |
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1774 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 1775 ResourceMark rm; |
1776 // Ignored outputs: | |
1777 uint ignore_this_trap_count; | |
1778 bool ignore_maybe_prior_trap; | |
1779 bool ignore_maybe_prior_recompile; | |
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1780 // Graal uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
5130 | 1781 bool update_total_counts = GRAAL_ONLY(false) NOT_GRAAL(true); |
0 | 1782 query_update_method_data(trap_mdo, trap_bci, |
1783 (DeoptReason)reason, | |
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1784 update_total_counts, |
0 | 1785 ignore_this_trap_count, |
1786 ignore_maybe_prior_trap, | |
1787 ignore_maybe_prior_recompile); | |
1788 } | |
1789 | |
1790 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request) { | |
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1791 if (TraceDeoptimization) { |
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1792 tty->print("Uncommon trap "); |
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1793 } |
0 | 1794 // Still in Java no safepoints |
1795 { | |
1796 // This enters VM and may safepoint | |
1797 uncommon_trap_inner(thread, trap_request); | |
1798 } | |
1799 return fetch_unroll_info_helper(thread); | |
1800 } | |
1801 | |
1802 // Local derived constants. | |
1803 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
1804 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
1805 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
1806 | |
1807 //---------------------------trap_state_reason--------------------------------- | |
1808 Deoptimization::DeoptReason | |
1809 Deoptimization::trap_state_reason(int trap_state) { | |
1810 // This assert provides the link between the width of DataLayout::trap_bits | |
1811 // and the encoding of "recorded" reasons. It ensures there are enough | |
1812 // bits to store all needed reasons in the per-BCI MDO profile. | |
1813 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
1814 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1815 trap_state -= recompile_bit; | |
1816 if (trap_state == DS_REASON_MASK) { | |
1817 return Reason_many; | |
1818 } else { | |
1819 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
1820 return (DeoptReason)trap_state; | |
1821 } | |
1822 } | |
1823 //-------------------------trap_state_has_reason------------------------------- | |
1824 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
1825 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
1826 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
1827 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1828 trap_state -= recompile_bit; | |
1829 if (trap_state == DS_REASON_MASK) { | |
1830 return -1; // true, unspecifically (bottom of state lattice) | |
1831 } else if (trap_state == reason) { | |
1832 return 1; // true, definitely | |
1833 } else if (trap_state == 0) { | |
1834 return 0; // false, definitely (top of state lattice) | |
1835 } else { | |
1836 return 0; // false, definitely | |
1837 } | |
1838 } | |
1839 //-------------------------trap_state_add_reason------------------------------- | |
1840 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
1841 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
1842 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1843 trap_state -= recompile_bit; | |
1844 if (trap_state == DS_REASON_MASK) { | |
1845 return trap_state + recompile_bit; // already at state lattice bottom | |
1846 } else if (trap_state == reason) { | |
1847 return trap_state + recompile_bit; // the condition is already true | |
1848 } else if (trap_state == 0) { | |
1849 return reason + recompile_bit; // no condition has yet been true | |
1850 } else { | |
1851 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
1852 } | |
1853 } | |
1854 //-----------------------trap_state_is_recompiled------------------------------ | |
1855 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
1856 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
1857 } | |
1858 //-----------------------trap_state_set_recompiled----------------------------- | |
1859 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
1860 if (z) return trap_state | DS_RECOMPILE_BIT; | |
1861 else return trap_state & ~DS_RECOMPILE_BIT; | |
1862 } | |
1863 //---------------------------format_trap_state--------------------------------- | |
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1864 // This is used for debugging and diagnostics, including LogFile output. |
0 | 1865 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, |
1866 int trap_state) { | |
1867 DeoptReason reason = trap_state_reason(trap_state); | |
1868 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
1869 // Re-encode the state from its decoded components. | |
1870 int decoded_state = 0; | |
1871 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
1872 decoded_state = trap_state_add_reason(decoded_state, reason); | |
1873 if (recomp_flag) | |
1874 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
1875 // If the state re-encodes properly, format it symbolically. | |
1876 // Because this routine is used for debugging and diagnostics, | |
1877 // be robust even if the state is a strange value. | |
1878 size_t len; | |
1879 if (decoded_state != trap_state) { | |
1880 // Random buggy state that doesn't decode?? | |
1881 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
1882 } else { | |
1883 len = jio_snprintf(buf, buflen, "%s%s", | |
1884 trap_reason_name(reason), | |
1885 recomp_flag ? " recompiled" : ""); | |
1886 } | |
1887 if (len >= buflen) | |
1888 buf[buflen-1] = '\0'; | |
1889 return buf; | |
1890 } | |
1891 | |
1892 | |
1893 //--------------------------------statics-------------------------------------- | |
1894 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
1895 = Deoptimization::Action_reinterpret; | |
1896 const char* Deoptimization::_trap_reason_name[Reason_LIMIT] = { | |
1897 // Note: Keep this in sync. with enum DeoptReason. | |
1898 "none", | |
1899 "null_check", | |
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1900 "null_assert" GRAAL_ONLY("|unreached0"), |
0 | 1901 "range_check", |
1902 "class_check", | |
1903 "array_check", | |
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1904 "intrinsic" GRAAL_ONLY("|type_checked_inlining"), |
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1905 "bimorphic" GRAAL_ONLY("|optimized_type_check"), |
0 | 1906 "unloaded", |
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1907 "uninitialized" GRAAL_ONLY("|unresolved"), |
0 | 1908 "unreached", |
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1909 "unhandled" GRAAL_ONLY("|not_compiled_exception_handler"), |
0 | 1910 "constraint", |
1911 "div0_check", | |
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1912 "age" GRAAL_ONLY("|jsr_mismatch"), |
3345 | 1913 "predicate", |
1914 "loop_limit_check" | |
0 | 1915 }; |
1916 const char* Deoptimization::_trap_action_name[Action_LIMIT] = { | |
1917 // Note: Keep this in sync. with enum DeoptAction. | |
1918 "none", | |
1919 "maybe_recompile", | |
1920 "reinterpret", | |
1921 "make_not_entrant", | |
1922 "make_not_compilable" | |
1923 }; | |
1924 | |
1925 const char* Deoptimization::trap_reason_name(int reason) { | |
1926 if (reason == Reason_many) return "many"; | |
1927 if ((uint)reason < Reason_LIMIT) | |
1928 return _trap_reason_name[reason]; | |
1929 static char buf[20]; | |
1930 sprintf(buf, "reason%d", reason); | |
1931 return buf; | |
1932 } | |
1933 const char* Deoptimization::trap_action_name(int action) { | |
1934 if ((uint)action < Action_LIMIT) | |
1935 return _trap_action_name[action]; | |
1936 static char buf[20]; | |
1937 sprintf(buf, "action%d", action); | |
1938 return buf; | |
1939 } | |
1940 | |
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1941 // This is used for debugging and diagnostics, including LogFile output. |
0 | 1942 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, |
1943 int trap_request) { | |
1944 jint unloaded_class_index = trap_request_index(trap_request); | |
1945 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
1946 const char* action = trap_action_name(trap_request_action(trap_request)); | |
1947 size_t len; | |
1948 if (unloaded_class_index < 0) { | |
1949 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'", | |
1950 reason, action); | |
1951 } else { | |
1952 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'", | |
1953 reason, action, unloaded_class_index); | |
1954 } | |
1955 if (len >= buflen) | |
1956 buf[buflen-1] = '\0'; | |
1957 return buf; | |
1958 } | |
1959 | |
1960 juint Deoptimization::_deoptimization_hist | |
1961 [Deoptimization::Reason_LIMIT] | |
1962 [1 + Deoptimization::Action_LIMIT] | |
1963 [Deoptimization::BC_CASE_LIMIT] | |
1964 = {0}; | |
1965 | |
1966 enum { | |
1967 LSB_BITS = 8, | |
1968 LSB_MASK = right_n_bits(LSB_BITS) | |
1969 }; | |
1970 | |
1971 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
1972 Bytecodes::Code bc) { | |
1973 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
1974 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
1975 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
1976 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
1977 juint* cases = _deoptimization_hist[reason][1+action]; | |
1978 juint* bc_counter_addr = NULL; | |
1979 juint bc_counter = 0; | |
1980 // Look for an unused counter, or an exact match to this BC. | |
1981 if (bc != Bytecodes::_illegal) { | |
1982 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
1983 juint* counter_addr = &cases[bc_case]; | |
1984 juint counter = *counter_addr; | |
1985 if ((counter == 0 && bc_counter_addr == NULL) | |
1986 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
1987 // this counter is either free or is already devoted to this BC | |
1988 bc_counter_addr = counter_addr; | |
1989 bc_counter = counter | bc; | |
1990 } | |
1991 } | |
1992 } | |
1993 if (bc_counter_addr == NULL) { | |
1994 // Overflow, or no given bytecode. | |
1995 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
1996 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
1997 } | |
1998 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
1999 } | |
2000 | |
2001 jint Deoptimization::total_deoptimization_count() { | |
2002 return _deoptimization_hist[Reason_none][0][0]; | |
2003 } | |
2004 | |
2005 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
2006 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
2007 return _deoptimization_hist[reason][0][0]; | |
2008 } | |
2009 | |
2010 void Deoptimization::print_statistics() { | |
2011 juint total = total_deoptimization_count(); | |
2012 juint account = total; | |
2013 if (total != 0) { | |
2014 ttyLocker ttyl; | |
2015 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
2016 tty->print_cr("Deoptimization traps recorded:"); | |
2017 #define PRINT_STAT_LINE(name, r) \ | |
2018 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
2019 PRINT_STAT_LINE("total", total); | |
2020 // For each non-zero entry in the histogram, print the reason, | |
2021 // the action, and (if specifically known) the type of bytecode. | |
2022 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
2023 for (int action = 0; action < Action_LIMIT; action++) { | |
2024 juint* cases = _deoptimization_hist[reason][1+action]; | |
2025 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
2026 juint counter = cases[bc_case]; | |
2027 if (counter != 0) { | |
2028 char name[1*K]; | |
2029 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
2030 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
2031 bc = Bytecodes::_illegal; | |
2032 sprintf(name, "%s/%s/%s", | |
2033 trap_reason_name(reason), | |
2034 trap_action_name(action), | |
2035 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
2036 juint r = counter >> LSB_BITS; | |
2037 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
2038 account -= r; | |
2039 } | |
2040 } | |
2041 } | |
2042 } | |
2043 if (account != 0) { | |
2044 PRINT_STAT_LINE("unaccounted", account); | |
2045 } | |
2046 #undef PRINT_STAT_LINE | |
2047 if (xtty != NULL) xtty->tail("statistics"); | |
2048 } | |
2049 } | |
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2050 #else // COMPILER2 || SHARK || GRAAL |
0 | 2051 |
2052 | |
2053 // Stubs for C1 only system. | |
2054 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
2055 return false; | |
2056 } | |
2057 | |
2058 const char* Deoptimization::trap_reason_name(int reason) { | |
2059 return "unknown"; | |
2060 } | |
2061 | |
2062 void Deoptimization::print_statistics() { | |
2063 // no output | |
2064 } | |
2065 | |
2066 void | |
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2067 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 2068 // no udpate |
2069 } | |
2070 | |
2071 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
2072 return 0; | |
2073 } | |
2074 | |
2075 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2076 Bytecodes::Code bc) { | |
2077 // no update | |
2078 } | |
2079 | |
2080 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
2081 int trap_state) { | |
2082 jio_snprintf(buf, buflen, "#%d", trap_state); | |
2083 return buf; | |
2084 } | |
2085 | |
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2086 #endif // COMPILER2 || SHARK || GRAAL |