Mercurial > hg > truffle
annotate src/share/vm/runtime/deoptimization.cpp @ 21211:6b11405f0279
Fix typo
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Mon, 04 May 2015 08:49:06 +0200 |
parents | 7848fc12602b |
children | be896a1983c0 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "code/debugInfoRec.hpp" | |
28 #include "code/nmethod.hpp" | |
29 #include "code/pcDesc.hpp" | |
30 #include "code/scopeDesc.hpp" | |
31 #include "interpreter/bytecode.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "memory/allocation.inline.hpp" | |
35 #include "memory/oopFactory.hpp" | |
36 #include "memory/resourceArea.hpp" | |
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37 #include "oops/method.hpp" |
1972 | 38 #include "oops/oop.inline.hpp" |
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39 #include "oops/fieldStreams.hpp" |
1972 | 40 #include "prims/jvmtiThreadState.hpp" |
41 #include "runtime/biasedLocking.hpp" | |
42 #include "runtime/compilationPolicy.hpp" | |
43 #include "runtime/deoptimization.hpp" | |
44 #include "runtime/interfaceSupport.hpp" | |
45 #include "runtime/sharedRuntime.hpp" | |
46 #include "runtime/signature.hpp" | |
47 #include "runtime/stubRoutines.hpp" | |
48 #include "runtime/thread.hpp" | |
49 #include "runtime/vframe.hpp" | |
50 #include "runtime/vframeArray.hpp" | |
51 #include "runtime/vframe_hp.hpp" | |
52 #include "utilities/events.hpp" | |
53 #include "utilities/xmlstream.hpp" | |
54 #ifdef TARGET_ARCH_x86 | |
55 # include "vmreg_x86.inline.hpp" | |
56 #endif | |
57 #ifdef TARGET_ARCH_sparc | |
58 # include "vmreg_sparc.inline.hpp" | |
59 #endif | |
60 #ifdef TARGET_ARCH_zero | |
61 # include "vmreg_zero.inline.hpp" | |
62 #endif | |
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63 #ifdef TARGET_ARCH_arm |
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64 # include "vmreg_arm.inline.hpp" |
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65 #endif |
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66 #ifdef TARGET_ARCH_ppc |
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67 # include "vmreg_ppc.inline.hpp" |
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68 #endif |
1972 | 69 #ifdef COMPILER2 |
70 #ifdef TARGET_ARCH_MODEL_x86_32 | |
71 # include "adfiles/ad_x86_32.hpp" | |
72 #endif | |
73 #ifdef TARGET_ARCH_MODEL_x86_64 | |
74 # include "adfiles/ad_x86_64.hpp" | |
75 #endif | |
76 #ifdef TARGET_ARCH_MODEL_sparc | |
77 # include "adfiles/ad_sparc.hpp" | |
78 #endif | |
79 #ifdef TARGET_ARCH_MODEL_zero | |
80 # include "adfiles/ad_zero.hpp" | |
81 #endif | |
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82 #ifdef TARGET_ARCH_MODEL_arm |
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83 # include "adfiles/ad_arm.hpp" |
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84 #endif |
14391 | 85 #ifdef TARGET_ARCH_MODEL_ppc_32 |
86 # include "adfiles/ad_ppc_32.hpp" | |
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87 #endif |
14391 | 88 #ifdef TARGET_ARCH_MODEL_ppc_64 |
89 # include "adfiles/ad_ppc_64.hpp" | |
1972 | 90 #endif |
14391 | 91 #endif // COMPILER2 |
0 | 92 |
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93 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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94 |
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95 #ifdef GRAAL |
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96 #include "graal/graalRuntime.hpp" |
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97 #include "graal/graalJavaAccess.hpp" |
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98 #endif |
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99 |
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100 |
0 | 101 bool DeoptimizationMarker::_is_active = false; |
102 | |
103 Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, | |
104 int caller_adjustment, | |
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105 int caller_actual_parameters, |
0 | 106 int number_of_frames, |
107 intptr_t* frame_sizes, | |
108 address* frame_pcs, | |
109 BasicType return_type) { | |
110 _size_of_deoptimized_frame = size_of_deoptimized_frame; | |
111 _caller_adjustment = caller_adjustment; | |
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112 _caller_actual_parameters = caller_actual_parameters; |
0 | 113 _number_of_frames = number_of_frames; |
114 _frame_sizes = frame_sizes; | |
115 _frame_pcs = frame_pcs; | |
6197 | 116 _register_block = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2, mtCompiler); |
0 | 117 _return_type = return_type; |
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118 _initial_info = 0; |
0 | 119 // PD (x86 only) |
120 _counter_temp = 0; | |
121 _unpack_kind = 0; | |
122 _sender_sp_temp = 0; | |
123 | |
124 _total_frame_sizes = size_of_frames(); | |
125 } | |
126 | |
127 | |
128 Deoptimization::UnrollBlock::~UnrollBlock() { | |
6197 | 129 FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes, mtCompiler); |
130 FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs, mtCompiler); | |
131 FREE_C_HEAP_ARRAY(intptr_t, _register_block, mtCompiler); | |
0 | 132 } |
133 | |
134 | |
135 intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const { | |
136 assert(register_number < RegisterMap::reg_count, "checking register number"); | |
137 return &_register_block[register_number * 2]; | |
138 } | |
139 | |
140 | |
141 | |
142 int Deoptimization::UnrollBlock::size_of_frames() const { | |
143 // Acount first for the adjustment of the initial frame | |
144 int result = _caller_adjustment; | |
145 for (int index = 0; index < number_of_frames(); index++) { | |
146 result += frame_sizes()[index]; | |
147 } | |
148 return result; | |
149 } | |
150 | |
151 | |
152 void Deoptimization::UnrollBlock::print() { | |
153 ttyLocker ttyl; | |
154 tty->print_cr("UnrollBlock"); | |
155 tty->print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame); | |
156 tty->print( " frame_sizes: "); | |
157 for (int index = 0; index < number_of_frames(); index++) { | |
158 tty->print("%d ", frame_sizes()[index]); | |
159 } | |
160 tty->cr(); | |
161 } | |
162 | |
163 | |
164 // In order to make fetch_unroll_info work properly with escape | |
165 // analysis, The method was changed from JRT_LEAF to JRT_BLOCK_ENTRY and | |
166 // ResetNoHandleMark and HandleMark were removed from it. The actual reallocation | |
167 // of previously eliminated objects occurs in realloc_objects, which is | |
168 // called from the method fetch_unroll_info_helper below. | |
169 JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* thread)) | |
170 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
171 // but makes the entry a little slower. There is however a little dance we have to | |
172 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
173 | |
174 // fetch_unroll_info() is called at the beginning of the deoptimization | |
175 // handler. Note this fact before we start generating temporary frames | |
176 // that can confuse an asynchronous stack walker. This counter is | |
177 // decremented at the end of unpack_frames(). | |
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178 if (TraceDeoptimization) { |
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179 tty->print_cr("Deoptimizing thread " INTPTR_FORMAT, thread); |
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180 } |
0 | 181 thread->inc_in_deopt_handler(); |
182 | |
183 return fetch_unroll_info_helper(thread); | |
184 JRT_END | |
185 | |
186 | |
187 // This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap) | |
188 Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* thread) { | |
189 | |
190 // Note: there is a safepoint safety issue here. No matter whether we enter | |
191 // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once | |
192 // the vframeArray is created. | |
193 // | |
194 | |
195 // Allocate our special deoptimization ResourceMark | |
196 DeoptResourceMark* dmark = new DeoptResourceMark(thread); | |
197 assert(thread->deopt_mark() == NULL, "Pending deopt!"); | |
198 thread->set_deopt_mark(dmark); | |
199 | |
200 frame stub_frame = thread->last_frame(); // Makes stack walkable as side effect | |
201 RegisterMap map(thread, true); | |
202 RegisterMap dummy_map(thread, false); | |
203 // Now get the deoptee with a valid map | |
204 frame deoptee = stub_frame.sender(&map); | |
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205 // Set the deoptee nmethod |
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206 assert(thread->deopt_nmethod() == NULL, "Pending deopt!"); |
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207 thread->set_deopt_nmethod(deoptee.cb()->as_nmethod_or_null()); |
0 | 208 |
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209 if (VerifyStack) { |
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210 thread->validate_frame_layout(); |
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211 } |
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212 |
0 | 213 // Create a growable array of VFrames where each VFrame represents an inlined |
214 // Java frame. This storage is allocated with the usual system arena. | |
215 assert(deoptee.is_compiled_frame(), "Wrong frame type"); | |
216 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); | |
217 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
218 while (!vf->is_top()) { | |
219 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
220 chunk->push(compiledVFrame::cast(vf)); | |
221 vf = vf->sender(); | |
222 } | |
223 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
224 chunk->push(compiledVFrame::cast(vf)); | |
225 | |
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226 bool realloc_failures = false; |
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227 |
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228 #if defined(COMPILER2) || defined(GRAAL) |
0 | 229 // Reallocate the non-escaping objects and restore their fields. Then |
230 // relock objects if synchronization on them was eliminated. | |
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231 #ifdef COMPILER2 |
4777 | 232 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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233 if (EliminateAllocations) { |
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234 #endif // COMPILER2 |
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235 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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236 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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237 |
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238 // The flag return_oop() indicates call sites which return oop |
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239 // in compiled code. Such sites include java method calls, |
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240 // runtime calls (for example, used to allocate new objects/arrays |
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241 // on slow code path) and any other calls generated in compiled code. |
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242 // It is not guaranteed that we can get such information here only |
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243 // by analyzing bytecode in deoptimized frames. This is why this flag |
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244 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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245 // If the previous frame was popped, we don't have a result. |
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246 bool save_oop_result = chunk->at(0)->scope()->return_oop() && !thread->popframe_forcing_deopt_reexecution(); |
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247 Handle return_value; |
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248 if (save_oop_result) { |
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249 // Reallocation may trigger GC. If deoptimization happened on return from |
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250 // call which returns oop we need to save it since it is not in oopmap. |
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251 oop result = deoptee.saved_oop_result(&map); |
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252 assert(result == NULL || result->is_oop(), "must be oop"); |
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253 return_value = Handle(thread, result); |
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254 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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255 if (TraceDeoptimization) { |
6843 | 256 ttyLocker ttyl; |
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257 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, (void *)result, thread); |
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258 } |
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259 } |
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260 if (objects != NULL) { |
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261 JRT_BLOCK |
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262 realloc_failures = realloc_objects(thread, &deoptee, objects, THREAD); |
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263 JRT_END |
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264 reassign_fields(&deoptee, &map, objects, realloc_failures); |
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265 #ifndef PRODUCT |
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266 if (TraceDeoptimization) { |
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267 ttyLocker ttyl; |
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268 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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269 print_objects(objects, realloc_failures); |
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270 } |
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271 #endif |
0 | 272 } |
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273 if (save_oop_result) { |
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274 // Restore result. |
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275 deoptee.set_saved_oop_result(&map, return_value()); |
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276 } |
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277 #ifdef COMPILER2 |
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278 } |
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279 if (EliminateLocks) { |
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280 #endif // COMPILER2 |
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281 #ifndef PRODUCT |
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282 bool first = true; |
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283 #endif |
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284 for (int i = 0; i < chunk->length(); i++) { |
83
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285 compiledVFrame* cvf = chunk->at(i); |
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286 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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287 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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288 if (monitors->is_nonempty()) { |
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289 relock_objects(monitors, thread, realloc_failures); |
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290 #ifndef PRODUCT |
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291 if (PrintDeoptimizationDetails) { |
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292 ttyLocker ttyl; |
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293 for (int j = 0; j < monitors->length(); j++) { |
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294 MonitorInfo* mi = monitors->at(j); |
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295 if (mi->eliminated()) { |
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296 if (first) { |
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297 first = false; |
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298 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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299 } |
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300 if (mi->owner_is_scalar_replaced()) { |
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301 Klass* k = java_lang_Class::as_Klass(mi->owner_klass()); |
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302 tty->print_cr(" failed reallocation for klass %s", k->external_name()); |
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303 } else { |
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304 tty->print_cr(" object <" INTPTR_FORMAT "> locked", (void *)mi->owner()); |
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305 } |
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306 } |
0 | 307 } |
308 } | |
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309 #endif |
0 | 310 } |
311 } | |
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312 #ifdef COMPILER2 |
0 | 313 } |
314 } | |
315 #endif // COMPILER2 | |
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316 #endif // COMPILER2 || GRAAL |
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317 |
0 | 318 // Ensure that no safepoint is taken after pointers have been stored |
319 // in fields of rematerialized objects. If a safepoint occurs from here on | |
320 // out the java state residing in the vframeArray will be missed. | |
321 No_Safepoint_Verifier no_safepoint; | |
322 | |
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323 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk, realloc_failures); |
20804 | 324 #if defined(COMPILER2) || defined(GRAAL) |
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325 if (realloc_failures) { |
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326 pop_frames_failed_reallocs(thread, array); |
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327 } |
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328 #endif |
0 | 329 |
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330 assert(thread->vframe_array_head() == NULL, "Pending deopt!"); |
0 | 331 thread->set_vframe_array_head(array); |
332 | |
333 // Now that the vframeArray has been created if we have any deferred local writes | |
334 // added by jvmti then we can free up that structure as the data is now in the | |
335 // vframeArray | |
336 | |
337 if (thread->deferred_locals() != NULL) { | |
338 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals(); | |
339 int i = 0; | |
340 do { | |
341 // Because of inlining we could have multiple vframes for a single frame | |
342 // and several of the vframes could have deferred writes. Find them all. | |
343 if (list->at(i)->id() == array->original().id()) { | |
344 jvmtiDeferredLocalVariableSet* dlv = list->at(i); | |
345 list->remove_at(i); | |
346 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
347 delete dlv; | |
348 } else { | |
349 i++; | |
350 } | |
351 } while ( i < list->length() ); | |
352 if (list->length() == 0) { | |
353 thread->set_deferred_locals(NULL); | |
354 // free the list and elements back to C heap. | |
355 delete list; | |
356 } | |
357 | |
358 } | |
359 | |
1692 | 360 #ifndef SHARK |
0 | 361 // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
362 CodeBlob* cb = stub_frame.cb(); | |
363 // Verify we have the right vframeArray | |
364 assert(cb->frame_size() >= 0, "Unexpected frame size"); | |
365 intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); | |
366 | |
1204 | 367 // If the deopt call site is a MethodHandle invoke call site we have |
368 // to adjust the unpack_sp. | |
369 nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); | |
370 if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc())) | |
371 unpack_sp = deoptee.unextended_sp(); | |
372 | |
0 | 373 #ifdef ASSERT |
15104 | 374 assert(cb->is_deoptimization_stub() || |
375 cb->is_uncommon_trap_stub() || | |
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376 strcmp("Stub<DeoptimizationStub.deoptimizationHandler>", cb->name()) == 0 || |
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377 strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>", cb->name()) == 0, |
15104 | 378 err_msg("unexpected code blob: %s", cb->name())); |
0 | 379 #endif |
1692 | 380 #else |
381 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
382 #endif // !SHARK | |
383 | |
0 | 384 // This is a guarantee instead of an assert because if vframe doesn't match |
385 // we will unpack the wrong deoptimized frame and wind up in strange places | |
386 // where it will be very difficult to figure out what went wrong. Better | |
387 // to die an early death here than some very obscure death later when the | |
388 // trail is cold. | |
389 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
390 // in that it will fail to detect a problem when there is one. This needs | |
391 // more work in tiger timeframe. | |
392 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
393 | |
394 int number_of_frames = array->frames(); | |
395 | |
396 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
397 // virtual activation, which is the reverse of the elements in the vframes array. | |
6197 | 398 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
0 | 399 // +1 because we always have an interpreter return address for the final slot. |
6197 | 400 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
0 | 401 int popframe_extra_args = 0; |
402 // Create an interpreter return address for the stub to use as its return | |
403 // address so the skeletal frames are perfectly walkable | |
404 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
405 | |
406 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
407 // activation be put back on the expression stack of the caller for reexecution | |
408 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
409 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
410 } | |
411 | |
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412 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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413 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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414 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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415 // |
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416 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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417 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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418 |
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419 // It's possible that the number of paramters at the call site is |
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420 // different than number of arguments in the callee when method |
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421 // handles are used. If the caller is interpreted get the real |
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422 // value so that the proper amount of space can be added to it's |
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423 // frame. |
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424 bool caller_was_method_handle = false; |
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425 if (deopt_sender.is_interpreted_frame()) { |
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426 methodHandle method = deopt_sender.interpreter_frame_method(); |
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427 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
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428 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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429 // Method handle invokes may involve fairly arbitrary chains of |
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430 // calls so it's impossible to know how much actual space the |
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431 // caller has for locals. |
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432 caller_was_method_handle = true; |
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433 } |
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434 } |
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435 |
0 | 436 // |
437 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
438 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
439 // frame_sizes/frame_pcs[n] youngest frame (int) | |
440 // | |
441 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
442 // owns the space for the return address to it's caller). Confusing ain't it. | |
443 // | |
444 // The vframe array can address vframes with indices running from | |
445 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
446 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
447 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
448 // so things look a little strange in this loop. | |
449 // | |
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450 int callee_parameters = 0; |
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451 int callee_locals = 0; |
0 | 452 for (int index = 0; index < array->frames(); index++ ) { |
453 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
454 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
455 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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456 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(callee_parameters, |
0 | 457 callee_locals, |
458 index == 0, | |
459 popframe_extra_args); | |
460 // This pc doesn't have to be perfect just good enough to identify the frame | |
461 // as interpreted so the skeleton frame will be walkable | |
462 // The correct pc will be set when the skeleton frame is completely filled out | |
463 // The final pc we store in the loop is wrong and will be overwritten below | |
464 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
465 | |
466 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
467 callee_locals = array->element(index)->method()->max_locals(); | |
468 popframe_extra_args = 0; | |
469 } | |
470 | |
471 // Compute whether the root vframe returns a float or double value. | |
472 BasicType return_type; | |
473 { | |
474 HandleMark hm; | |
475 methodHandle method(thread, array->element(0)->method()); | |
2142 | 476 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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477 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
0 | 478 } |
479 | |
480 // Compute information for handling adapters and adjusting the frame size of the caller. | |
481 int caller_adjustment = 0; | |
482 | |
483 // Compute the amount the oldest interpreter frame will have to adjust | |
484 // its caller's stack by. If the caller is a compiled frame then | |
485 // we pretend that the callee has no parameters so that the | |
486 // extension counts for the full amount of locals and not just | |
487 // locals-parms. This is because without a c2i adapter the parm | |
488 // area as created by the compiled frame will not be usable by | |
489 // the interpreter. (Depending on the calling convention there | |
490 // may not even be enough space). | |
491 | |
492 // QQQ I'd rather see this pushed down into last_frame_adjust | |
493 // and have it take the sender (aka caller). | |
494 | |
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495 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
0 | 496 caller_adjustment = last_frame_adjust(0, callee_locals); |
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497 } else if (callee_locals > callee_parameters) { |
0 | 498 // The caller frame may need extending to accommodate |
499 // non-parameter locals of the first unpacked interpreted frame. | |
500 // Compute that adjustment. | |
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501 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
0 | 502 } |
503 | |
504 // If the sender is deoptimized the we must retrieve the address of the handler | |
505 // since the frame will "magically" show the original pc before the deopt | |
506 // and we'd undo the deopt. | |
507 | |
508 frame_pcs[0] = deopt_sender.raw_pc(); | |
509 | |
1692 | 510 #ifndef SHARK |
0 | 511 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
1692 | 512 #endif // SHARK |
0 | 513 |
514 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, | |
515 caller_adjustment * BytesPerWord, | |
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516 caller_was_method_handle ? 0 : callee_parameters, |
0 | 517 number_of_frames, |
518 frame_sizes, | |
519 frame_pcs, | |
520 return_type); | |
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521 // On some platforms, we need a way to pass some platform dependent |
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522 // information to the unpacking code so the skeletal frames come out |
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523 // correct (initial fp value, unextended sp, ...) |
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524 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
0 | 525 |
526 if (array->frames() > 1) { | |
527 if (VerifyStack && TraceDeoptimization) { | |
6843 | 528 ttyLocker ttyl; |
0 | 529 tty->print_cr("Deoptimizing method containing inlining"); |
530 } | |
531 } | |
532 | |
533 array->set_unroll_block(info); | |
534 return info; | |
535 } | |
536 | |
537 // Called to cleanup deoptimization data structures in normal case | |
538 // after unpacking to stack and when stack overflow error occurs | |
539 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
540 vframeArray *array) { | |
541 | |
542 // Get array if coming from exception | |
543 if (array == NULL) { | |
544 array = thread->vframe_array_head(); | |
545 } | |
546 thread->set_vframe_array_head(NULL); | |
547 | |
548 // Free the previous UnrollBlock | |
549 vframeArray* old_array = thread->vframe_array_last(); | |
550 thread->set_vframe_array_last(array); | |
551 | |
552 if (old_array != NULL) { | |
553 UnrollBlock* old_info = old_array->unroll_block(); | |
554 old_array->set_unroll_block(NULL); | |
555 delete old_info; | |
556 delete old_array; | |
557 } | |
558 | |
559 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
560 // inside the vframeArray (StackValueCollections) | |
561 | |
562 delete thread->deopt_mark(); | |
563 thread->set_deopt_mark(NULL); | |
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564 thread->set_deopt_nmethod(NULL); |
0 | 565 |
566 | |
567 if (JvmtiExport::can_pop_frame()) { | |
568 #ifndef CC_INTERP | |
569 // Regardless of whether we entered this routine with the pending | |
570 // popframe condition bit set, we should always clear it now | |
571 thread->clear_popframe_condition(); | |
572 #else | |
573 // C++ interpeter will clear has_pending_popframe when it enters | |
574 // with method_resume. For deopt_resume2 we clear it now. | |
575 if (thread->popframe_forcing_deopt_reexecution()) | |
576 thread->clear_popframe_condition(); | |
577 #endif /* CC_INTERP */ | |
578 } | |
579 | |
580 // unpack_frames() is called at the end of the deoptimization handler | |
581 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
582 // so that an asynchronous stack walker can work again. This counter is | |
583 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
584 // the beginning of uncommon_trap(). | |
585 thread->dec_in_deopt_handler(); | |
586 } | |
587 | |
588 | |
589 // Return BasicType of value being returned | |
590 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
591 | |
592 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
593 // allocate will be freed at the end of the routine. | |
594 | |
595 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
596 // but makes the entry a little slower. There is however a little dance we have to | |
597 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
598 ResetNoHandleMark rnhm; // No-op in release/product versions | |
599 HandleMark hm; | |
600 | |
601 frame stub_frame = thread->last_frame(); | |
602 | |
603 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
604 // must point to the vframeArray for the unpack frame. | |
605 vframeArray* array = thread->vframe_array_head(); | |
606 | |
607 #ifndef PRODUCT | |
608 if (TraceDeoptimization) { | |
6843 | 609 ttyLocker ttyl; |
0 | 610 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
611 } | |
612 #endif | |
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613 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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614 stub_frame.pc(), stub_frame.sp(), exec_mode); |
0 | 615 |
616 UnrollBlock* info = array->unroll_block(); | |
617 | |
618 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
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619 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
0 | 620 |
621 BasicType bt = info->return_type(); | |
622 | |
623 // If we have an exception pending, claim that the return type is an oop | |
624 // so the deopt_blob does not overwrite the exception_oop. | |
625 | |
626 if (exec_mode == Unpack_exception) | |
627 bt = T_OBJECT; | |
628 | |
629 // Cleanup thread deopt data | |
630 cleanup_deopt_info(thread, array); | |
631 | |
632 #ifndef PRODUCT | |
633 if (VerifyStack) { | |
634 ResourceMark res_mark; | |
635 | |
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636 thread->validate_frame_layout(); |
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637 |
0 | 638 // Verify that the just-unpacked frames match the interpreter's |
639 // notions of expression stack and locals | |
640 vframeArray* cur_array = thread->vframe_array_last(); | |
641 RegisterMap rm(thread, false); | |
642 rm.set_include_argument_oops(false); | |
643 bool is_top_frame = true; | |
644 int callee_size_of_parameters = 0; | |
645 int callee_max_locals = 0; | |
646 for (int i = 0; i < cur_array->frames(); i++) { | |
647 vframeArrayElement* el = cur_array->element(i); | |
648 frame* iframe = el->iframe(); | |
649 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
650 | |
651 // Get the oop map for this bci | |
652 InterpreterOopMap mask; | |
653 int cur_invoke_parameter_size = 0; | |
654 bool try_next_mask = false; | |
655 int next_mask_expression_stack_size = -1; | |
656 int top_frame_expression_stack_adjustment = 0; | |
657 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
658 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
659 BytecodeStream str(mh); | |
660 str.set_start(iframe->interpreter_frame_bci()); | |
661 int max_bci = mh->code_size(); | |
662 // Get to the next bytecode if possible | |
663 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
664 // Check to see if we can grab the number of outgoing arguments | |
665 // at an uncommon trap for an invoke (where the compiler | |
666 // generates debug info before the invoke has executed) | |
667 Bytecodes::Code cur_code = str.next(); | |
10390 | 668 if (cur_code == Bytecodes::_invokevirtual || |
669 cur_code == Bytecodes::_invokespecial || | |
670 cur_code == Bytecodes::_invokestatic || | |
671 cur_code == Bytecodes::_invokeinterface || | |
672 cur_code == Bytecodes::_invokedynamic) { | |
2142 | 673 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
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674 Symbol* signature = invoke.signature(); |
0 | 675 ArgumentSizeComputer asc(signature); |
676 cur_invoke_parameter_size = asc.size(); | |
10390 | 677 if (invoke.has_receiver()) { |
0 | 678 // Add in receiver |
679 ++cur_invoke_parameter_size; | |
680 } | |
10390 | 681 if (i != 0 && !invoke.is_invokedynamic() && MethodHandles::has_member_arg(invoke.klass(), invoke.name())) { |
682 callee_size_of_parameters++; | |
683 } | |
0 | 684 } |
685 if (str.bci() < max_bci) { | |
686 Bytecodes::Code bc = str.next(); | |
687 if (bc >= 0) { | |
688 // The interpreter oop map generator reports results before | |
689 // the current bytecode has executed except in the case of | |
690 // calls. It seems to be hard to tell whether the compiler | |
691 // has emitted debug information matching the "state before" | |
692 // a given bytecode or the state after, so we try both | |
693 switch (cur_code) { | |
694 case Bytecodes::_invokevirtual: | |
695 case Bytecodes::_invokespecial: | |
696 case Bytecodes::_invokestatic: | |
697 case Bytecodes::_invokeinterface: | |
10390 | 698 case Bytecodes::_invokedynamic: |
0 | 699 case Bytecodes::_athrow: |
700 break; | |
701 default: { | |
702 InterpreterOopMap next_mask; | |
703 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
704 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
705 // Need to subtract off the size of the result type of | |
706 // the bytecode because this is not described in the | |
707 // debug info but returned to the interpreter in the TOS | |
708 // caching register | |
709 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
710 if (bytecode_result_type != T_ILLEGAL) { | |
711 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
712 } | |
713 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
714 try_next_mask = true; | |
715 break; | |
716 } | |
717 } | |
718 } | |
719 } | |
720 | |
721 // Verify stack depth and oops in frame | |
722 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
723 if (!( | |
724 /* SPARC */ | |
725 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
726 /* x86 */ | |
727 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
728 (try_next_mask && | |
729 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
730 top_frame_expression_stack_adjustment))) || | |
731 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
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732 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute || el->should_reexecute()) && |
0 | 733 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) |
734 )) { | |
735 ttyLocker ttyl; | |
736 | |
737 // Print out some information that will help us debug the problem | |
738 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
739 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
740 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
741 iframe->interpreter_frame_expression_stack_size()); | |
742 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
743 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
744 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
745 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
746 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
747 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
748 tty->print_cr(" exec_mode = %d", exec_mode); | |
749 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
750 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
751 tty->print_cr(" Interpreted frames:"); | |
752 for (int k = 0; k < cur_array->frames(); k++) { | |
753 vframeArrayElement* el = cur_array->element(k); | |
754 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
755 } | |
756 cur_array->print_on_2(tty); | |
757 guarantee(false, "wrong number of expression stack elements during deopt"); | |
758 } | |
759 VerifyOopClosure verify; | |
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760 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
0 | 761 callee_size_of_parameters = mh->size_of_parameters(); |
762 callee_max_locals = mh->max_locals(); | |
763 is_top_frame = false; | |
764 } | |
765 } | |
766 #endif /* !PRODUCT */ | |
767 | |
768 | |
769 return bt; | |
770 JRT_END | |
771 | |
772 | |
773 int Deoptimization::deoptimize_dependents() { | |
774 Threads::deoptimized_wrt_marked_nmethods(); | |
775 return 0; | |
776 } | |
777 | |
778 | |
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779 #if defined(COMPILER2) || defined(GRAAL) |
0 | 780 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
781 Handle pending_exception(thread->pending_exception()); | |
782 const char* exception_file = thread->exception_file(); | |
783 int exception_line = thread->exception_line(); | |
784 thread->clear_pending_exception(); | |
785 | |
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786 bool failures = false; |
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787 |
0 | 788 for (int i = 0; i < objects->length(); i++) { |
789 assert(objects->at(i)->is_object(), "invalid debug information"); | |
790 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
791 | |
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792 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 793 oop obj = NULL; |
794 | |
795 if (k->oop_is_instance()) { | |
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796 InstanceKlass* ik = InstanceKlass::cast(k()); |
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797 obj = ik->allocate_instance(THREAD); |
0 | 798 } else if (k->oop_is_typeArray()) { |
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799 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 800 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
801 int len = sv->field_size() / type2size[ak->element_type()]; | |
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802 obj = ak->allocate(len, THREAD); |
0 | 803 } else if (k->oop_is_objArray()) { |
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804 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
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805 obj = ak->allocate(sv->field_size(), THREAD); |
0 | 806 } |
807 | |
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808 if (obj == NULL) { |
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809 failures = true; |
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810 } |
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811 |
0 | 812 assert(sv->value().is_null(), "redundant reallocation"); |
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813 assert(obj != NULL || HAS_PENDING_EXCEPTION, "allocation should succeed or we should get an exception"); |
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814 CLEAR_PENDING_EXCEPTION; |
0 | 815 sv->set_value(obj); |
816 } | |
817 | |
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818 if (failures) { |
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819 THROW_OOP_(Universe::out_of_memory_error_realloc_objects(), failures); |
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820 } else if (pending_exception.not_null()) { |
0 | 821 thread->set_pending_exception(pending_exception(), exception_file, exception_line); |
822 } | |
823 | |
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824 return failures; |
0 | 825 } |
826 | |
827 // restore elements of an eliminated type array | |
828 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
829 int index = 0; | |
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830 intptr_t val; |
0 | 831 |
832 for (int i = 0; i < sv->field_size(); i++) { | |
833 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
834 switch(type) { | |
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835 case T_LONG: case T_DOUBLE: { |
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836 assert(value->type() == T_INT, "Agreement."); |
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837 StackValue* low = |
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838 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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|
839 #ifdef _LP64 |
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|
840 jlong res = (jlong)low->get_int(); |
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841 #else |
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842 #ifdef SPARC |
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843 // For SPARC we have to swap high and low words. |
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844 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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845 #else |
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846 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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847 #endif //SPARC |
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848 #endif |
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849 obj->long_at_put(index, res); |
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|
850 break; |
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|
851 } |
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852 |
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|
853 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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854 case T_INT: case T_FLOAT: { // 4 bytes. |
44
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855 assert(value->type() == T_INT, "Agreement."); |
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|
856 bool big_value = false; |
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857 if (i + 1 < sv->field_size() && type == T_INT) { |
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|
858 if (sv->field_at(i)->is_location()) { |
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859 Location::Type type = ((LocationValue*) sv->field_at(i))->location().type(); |
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860 if (type == Location::dbl || type == Location::lng) { |
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861 big_value = true; |
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862 } |
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863 } else if (sv->field_at(i)->is_constant_int()) { |
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864 ScopeValue* next_scope_field = sv->field_at(i + 1); |
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865 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
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866 big_value = true; |
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867 } |
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868 } |
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869 } |
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870 |
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871 if (big_value) { |
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872 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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873 #ifdef _LP64 |
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874 jlong res = (jlong)low->get_int(); |
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875 #else |
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876 #ifdef SPARC |
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877 // For SPARC we have to swap high and low words. |
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878 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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879 #else |
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880 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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881 #endif //SPARC |
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882 #endif |
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883 obj->int_at_put(index, (jint)*((jint*)&res)); |
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884 obj->int_at_put(++index, (jint)*(((jint*)&res) + 1)); |
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885 } else { |
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886 val = value->get_int(); |
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887 obj->int_at_put(index, (jint)*((jint*)&val)); |
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|
888 } |
44
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|
889 break; |
18133
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|
890 } |
44
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|
891 |
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|
892 case T_SHORT: case T_CHAR: // 2 bytes |
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|
893 assert(value->type() == T_INT, "Agreement."); |
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|
894 val = value->get_int(); |
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diff
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|
895 obj->short_at_put(index, (jshort)*((jint*)&val)); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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diff
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|
896 break; |
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|
897 |
52fed2ec0afb
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kvn
parents:
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diff
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|
898 case T_BOOLEAN: case T_BYTE: // 1 byte |
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|
899 assert(value->type() == T_INT, "Agreement."); |
52fed2ec0afb
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diff
changeset
|
900 val = value->get_int(); |
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|
901 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
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|
902 break; |
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|
903 |
0 | 904 default: |
905 ShouldNotReachHere(); | |
906 } | |
907 index++; | |
908 } | |
909 } | |
910 | |
911 | |
912 // restore fields of an eliminated object array | |
913 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
914 for (int i = 0; i < sv->field_size(); i++) { | |
915 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
916 assert(value->type() == T_OBJECT, "object element expected"); | |
917 obj->obj_at_put(i, value->get_obj()()); | |
918 } | |
919 } | |
920 | |
7222 | 921 class ReassignedField { |
922 public: | |
923 int _offset; | |
924 BasicType _type; | |
925 public: | |
926 ReassignedField() { | |
927 _offset = 0; | |
928 _type = T_ILLEGAL; | |
929 } | |
930 }; | |
7137
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|
931 |
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|
932 int compare(ReassignedField* left, ReassignedField* right) { |
7222 | 933 return left->_offset - right->_offset; |
7137
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934 } |
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|
935 |
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
|
936 // Restore fields of an eliminated instance object using the same field order |
18223
17c98fad6980
converted HotSpotResolvedObjectType to an interface
Doug Simon <doug.simon@oracle.com>
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18133
diff
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|
937 // returned by HotSpotResolvedObjectTypeImpl.getInstanceFields(true) |
6948
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
938 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj) { |
e522a00b91aa
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|
939 if (klass->superklass() != NULL) { |
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Doug Simon <doug.simon@oracle.com>
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|
940 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj); |
e522a00b91aa
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|
941 } |
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Doug Simon <doug.simon@oracle.com>
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|
942 |
7137
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943 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
6948
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Doug Simon <doug.simon@oracle.com>
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|
944 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
7137
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945 if (!fs.access_flags().is_static()) { |
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|
946 ReassignedField field; |
7222 | 947 field._offset = fs.offset(); |
948 field._type = FieldType::basic_type(fs.signature()); | |
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|
949 fields->append(field); |
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|
950 } |
7137
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|
951 } |
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|
952 fields->sort(compare); |
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|
953 for (int i = 0; i < fields->length(); i++) { |
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|
954 intptr_t val; |
12617
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955 ScopeValue* scope_field = sv->field_at(svIndex); |
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956 StackValue* value = StackValue::create_stack_value(fr, reg_map, scope_field); |
7222 | 957 int offset = fields->at(i)._offset; |
958 BasicType type = fields->at(i)._type; | |
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|
959 switch (type) { |
e522a00b91aa
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|
960 case T_OBJECT: case T_ARRAY: |
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|
961 assert(value->type() == T_OBJECT, "Agreement."); |
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|
962 obj->obj_field_put(offset, value->get_obj()()); |
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Doug Simon <doug.simon@oracle.com>
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|
963 break; |
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|
964 |
12617
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|
965 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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|
966 case T_INT: case T_FLOAT: { // 4 bytes. |
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|
967 assert(value->type() == T_INT, "Agreement."); |
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|
968 bool big_value = false; |
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|
969 if (i+1 < fields->length() && fields->at(i+1)._type == T_INT) { |
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970 if (scope_field->is_location()) { |
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971 Location::Type type = ((LocationValue*) scope_field)->location().type(); |
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972 if (type == Location::dbl || type == Location::lng) { |
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973 big_value = true; |
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974 } |
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975 } |
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976 if (scope_field->is_constant_int()) { |
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977 ScopeValue* next_scope_field = sv->field_at(svIndex + 1); |
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978 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
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979 big_value = true; |
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980 } |
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981 } |
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982 } |
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983 |
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984 if (big_value) { |
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985 i++; |
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986 assert(i < fields->length(), "second T_INT field needed"); |
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987 assert(fields->at(i)._type == T_INT, "T_INT field needed"); |
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988 } else { |
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989 val = value->get_int(); |
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990 obj->int_field_put(offset, (jint)*((jint*)&val)); |
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991 break; |
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992 } |
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993 } |
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994 /* no break */ |
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995 |
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996 case T_LONG: case T_DOUBLE: { |
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997 assert(value->type() == T_INT, "Agreement."); |
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998 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
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999 #ifdef _LP64 |
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1000 jlong res = (jlong)low->get_int(); |
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1001 #else |
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1002 #ifdef SPARC |
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1003 // For SPARC we have to swap high and low words. |
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1004 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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1005 #else |
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1006 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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1007 #endif //SPARC |
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1008 #endif |
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1009 obj->long_field_put(offset, res); |
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1010 break; |
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1011 } |
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1012 |
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1013 case T_SHORT: case T_CHAR: // 2 bytes |
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1014 assert(value->type() == T_INT, "Agreement."); |
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1015 val = value->get_int(); |
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1016 obj->short_field_put(offset, (jshort)*((jint*)&val)); |
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1017 break; |
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1018 |
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1019 case T_BOOLEAN: case T_BYTE: // 1 byte |
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1020 assert(value->type() == T_INT, "Agreement."); |
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1021 val = value->get_int(); |
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1022 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
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1023 break; |
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1024 |
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1025 default: |
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1026 ShouldNotReachHere(); |
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1027 } |
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1028 svIndex++; |
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1029 } |
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1030 return svIndex; |
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1031 } |
0 | 1032 |
1033 // restore fields of all eliminated objects and arrays | |
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1034 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects, bool realloc_failures) { |
0 | 1035 for (int i = 0; i < objects->length(); i++) { |
1036 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1037 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 1038 Handle obj = sv->value(); |
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1039 assert(obj.not_null() || realloc_failures, "reallocation was missed"); |
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1040 if (obj.is_null()) { |
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1041 continue; |
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1042 } |
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
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diff
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|
1043 if (PrintDeoptimizationDetails) { |
3134
4b63eb1197ca
Various fixes around escape analysis.
Thomas Wuerthinger <thomas@wuerthinger.net>
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|
1044 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
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Various fixes around escape analysis.
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1045 } |
0 | 1046 |
1047 if (k->oop_is_instance()) { | |
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1048 InstanceKlass* ik = InstanceKlass::cast(k()); |
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1049 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj()); |
0 | 1050 } else if (k->oop_is_typeArray()) { |
6831
d8ce2825b193
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1051 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 1052 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
1053 } else if (k->oop_is_objArray()) { | |
1054 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
1055 } | |
1056 } | |
1057 } | |
1058 | |
1059 | |
1060 // relock objects for which synchronization was eliminated | |
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1061 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread, bool realloc_failures) { |
0 | 1062 for (int i = 0; i < monitors->length(); i++) { |
83
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1063 MonitorInfo* mon_info = monitors->at(i); |
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1064 if (mon_info->eliminated()) { |
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1065 assert(!mon_info->owner_is_scalar_replaced() || realloc_failures, "reallocation was missed"); |
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1066 if (!mon_info->owner_is_scalar_replaced()) { |
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1067 Handle obj = Handle(mon_info->owner()); |
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1068 markOop mark = obj->mark(); |
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1069 if (UseBiasedLocking && mark->has_bias_pattern()) { |
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1070 // New allocated objects may have the mark set to anonymously biased. |
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1071 // Also the deoptimized method may called methods with synchronization |
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1072 // where the thread-local object is bias locked to the current thread. |
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1073 assert(mark->is_biased_anonymously() || |
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1074 mark->biased_locker() == thread, "should be locked to current thread"); |
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1075 // Reset mark word to unbiased prototype. |
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1076 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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1077 obj->set_mark(unbiased_prototype); |
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1078 } |
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1079 BasicLock* lock = mon_info->lock(); |
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1080 ObjectSynchronizer::slow_enter(obj, lock, thread); |
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1081 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
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1082 } |
0 | 1083 } |
1084 } | |
1085 } | |
1086 | |
1087 | |
1088 #ifndef PRODUCT | |
1089 // print information about reallocated objects | |
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1090 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects, bool realloc_failures) { |
0 | 1091 fieldDescriptor fd; |
1092 | |
1093 for (int i = 0; i < objects->length(); i++) { | |
1094 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1095 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 1096 Handle obj = sv->value(); |
1097 | |
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1098 tty->print(" object <" INTPTR_FORMAT "> of type ", (void *)sv->value()()); |
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1099 k->print_value(); |
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1100 assert(obj.not_null() || realloc_failures, "reallocation was missed"); |
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1101 if (obj.is_null()) { |
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1102 tty->print(" allocation failed"); |
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1103 } else { |
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1104 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
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1105 } |
0 | 1106 tty->cr(); |
1107 | |
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1108 if (Verbose && !obj.is_null()) { |
0 | 1109 k->oop_print_on(obj(), tty); |
1110 } | |
1111 } | |
1112 } | |
1113 #endif | |
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1114 #endif // COMPILER2 || GRAAL |
0 | 1115 |
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1116 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk, bool realloc_failures) { |
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1117 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
0 | 1118 |
1119 #ifndef PRODUCT | |
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1120 if (PrintDeoptimizationDetails) { |
0 | 1121 ttyLocker ttyl; |
1122 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
1123 fr.print_on(tty); | |
1124 tty->print_cr(" Virtual frames (innermost first):"); | |
1125 for (int index = 0; index < chunk->length(); index++) { | |
1126 compiledVFrame* vf = chunk->at(index); | |
1127 tty->print(" %2d - ", index); | |
1128 vf->print_value(); | |
1129 int bci = chunk->at(index)->raw_bci(); | |
1130 const char* code_name; | |
1131 if (bci == SynchronizationEntryBCI) { | |
1132 code_name = "sync entry"; | |
1133 } else { | |
2142 | 1134 Bytecodes::Code code = vf->method()->code_at(bci); |
0 | 1135 code_name = Bytecodes::name(code); |
1136 } | |
1137 tty->print(" - %s", code_name); | |
1138 tty->print_cr(" @ bci %d ", bci); | |
1139 if (Verbose) { | |
1140 vf->print(); | |
1141 tty->cr(); | |
1142 } | |
1143 } | |
1144 } | |
1145 #endif | |
1146 | |
1147 // Register map for next frame (used for stack crawl). We capture | |
1148 // the state of the deopt'ing frame's caller. Thus if we need to | |
1149 // stuff a C2I adapter we can properly fill in the callee-save | |
1150 // register locations. | |
1151 frame caller = fr.sender(reg_map); | |
1152 int frame_size = caller.sp() - fr.sp(); | |
1153 | |
1154 frame sender = caller; | |
1155 | |
1156 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
1157 // the vframeArray containing the unpacking information is allocated in the C heap. | |
1158 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
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1159 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr, realloc_failures); |
0 | 1160 |
1161 // Compare the vframeArray to the collected vframes | |
1162 assert(array->structural_compare(thread, chunk), "just checking"); | |
1163 | |
1164 #ifndef PRODUCT | |
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1165 if (PrintDeoptimizationDetails) { |
0 | 1166 ttyLocker ttyl; |
1167 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
1168 } | |
1169 #endif // PRODUCT | |
1170 | |
1171 return array; | |
1172 } | |
1173 | |
20804 | 1174 #if defined(COMPILER2) || defined(GRAAL) |
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1175 void Deoptimization::pop_frames_failed_reallocs(JavaThread* thread, vframeArray* array) { |
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1176 // Reallocation of some scalar replaced objects failed. Record |
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1177 // that we need to pop all the interpreter frames for the |
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1178 // deoptimized compiled frame. |
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1179 assert(thread->frames_to_pop_failed_realloc() == 0, "missed frames to pop?"); |
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1180 thread->set_frames_to_pop_failed_realloc(array->frames()); |
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1181 // Unlock all monitors here otherwise the interpreter will see a |
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1182 // mix of locked and unlocked monitors (because of failed |
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1183 // reallocations of synchronized objects) and be confused. |
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1184 for (int i = 0; i < array->frames(); i++) { |
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1185 MonitorChunk* monitors = array->element(i)->monitors(); |
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1186 if (monitors != NULL) { |
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1187 for (int j = 0; j < monitors->number_of_monitors(); j++) { |
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1188 BasicObjectLock* src = monitors->at(j); |
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1189 if (src->obj() != NULL) { |
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1190 ObjectSynchronizer::fast_exit(src->obj(), src->lock(), thread); |
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1191 } |
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1192 } |
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1193 array->element(i)->free_monitors(thread); |
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1194 #ifdef ASSERT |
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1195 array->element(i)->set_removed_monitors(); |
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1196 #endif |
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1197 } |
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1198 } |
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1199 } |
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1200 #endif |
0 | 1201 |
1202 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
1203 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
1204 for (int i = 0; i < monitors->length(); i++) { | |
1205 MonitorInfo* mon_info = monitors->at(i); | |
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|
1206 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
0 | 1207 objects_to_revoke->append(Handle(mon_info->owner())); |
1208 } | |
1209 } | |
1210 } | |
1211 | |
1212 | |
1213 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
1214 if (!UseBiasedLocking) { | |
1215 return; | |
1216 } | |
1217 | |
1218 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1219 | |
1220 // Unfortunately we don't have a RegisterMap available in most of | |
1221 // the places we want to call this routine so we need to walk the | |
1222 // stack again to update the register map. | |
1223 if (map == NULL || !map->update_map()) { | |
1224 StackFrameStream sfs(thread, true); | |
1225 bool found = false; | |
1226 while (!found && !sfs.is_done()) { | |
1227 frame* cur = sfs.current(); | |
1228 sfs.next(); | |
1229 found = cur->id() == fr.id(); | |
1230 } | |
1231 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
1232 map = sfs.register_map(); | |
1233 } | |
1234 | |
1235 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
1236 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1237 // Revoke monitors' biases in all scopes | |
1238 while (!cvf->is_top()) { | |
1239 collect_monitors(cvf, objects_to_revoke); | |
1240 cvf = compiledVFrame::cast(cvf->sender()); | |
1241 } | |
1242 collect_monitors(cvf, objects_to_revoke); | |
1243 | |
1244 if (SafepointSynchronize::is_at_safepoint()) { | |
1245 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1246 } else { | |
1247 BiasedLocking::revoke(objects_to_revoke); | |
1248 } | |
1249 } | |
1250 | |
1251 | |
1252 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
1253 if (!UseBiasedLocking) { | |
1254 return; | |
1255 } | |
1256 | |
1257 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
1258 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1259 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
1260 if (jt->has_last_Java_frame()) { | |
1261 StackFrameStream sfs(jt, true); | |
1262 while (!sfs.is_done()) { | |
1263 frame* cur = sfs.current(); | |
1264 if (cb->contains(cur->pc())) { | |
1265 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
1266 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1267 // Revoke monitors' biases in all scopes | |
1268 while (!cvf->is_top()) { | |
1269 collect_monitors(cvf, objects_to_revoke); | |
1270 cvf = compiledVFrame::cast(cvf->sender()); | |
1271 } | |
1272 collect_monitors(cvf, objects_to_revoke); | |
1273 } | |
1274 sfs.next(); | |
1275 } | |
1276 } | |
1277 } | |
1278 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1279 } | |
1280 | |
1281 | |
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1282 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
0 | 1283 assert(fr.can_be_deoptimized(), "checking frame type"); |
1284 | |
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1285 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
0 | 1286 |
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1287 if (LogCompilation && xtty != NULL) { |
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1288 nmethod* nm = fr.cb()->as_nmethod_or_null(); |
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1289 assert(nm != NULL, "only nmethods can deopt"); |
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1290 |
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1291 ttyLocker ttyl; |
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1292 xtty->begin_head("deoptimized thread='" UINTX_FORMAT "'", thread->osthread()->thread_id()); |
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1293 nm->log_identity(xtty); |
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1294 xtty->end_head(); |
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1295 for (ScopeDesc* sd = nm->scope_desc_at(fr.pc()); ; sd = sd->sender()) { |
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1296 xtty->begin_elem("jvms bci='%d'", sd->bci()); |
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1297 xtty->method(sd->method()); |
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1298 xtty->end_elem(); |
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1299 if (sd->is_top()) break; |
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1300 } |
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1301 xtty->tail("deoptimized"); |
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1302 } |
0 | 1303 |
1304 // Patch the nmethod so that when execution returns to it we will | |
1305 // deopt the execution state and return to the interpreter. | |
1306 fr.deoptimize(thread); | |
1307 } | |
1308 | |
1309 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map) { | |
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1310 deoptimize(thread, fr, map, Reason_constraint); |
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1311 } |
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1312 |
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1313 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
0 | 1314 // Deoptimize only if the frame comes from compile code. |
1315 // Do not deoptimize the frame which is already patched | |
1316 // during the execution of the loops below. | |
1317 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
1318 return; | |
1319 } | |
1320 ResourceMark rm; | |
1321 DeoptimizationMarker dm; | |
1322 if (UseBiasedLocking) { | |
1323 revoke_biases_of_monitors(thread, fr, map); | |
1324 } | |
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1325 deoptimize_single_frame(thread, fr, reason); |
0 | 1326 |
1327 } | |
1328 | |
1329 | |
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1330 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1331 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
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1332 "can only deoptimize other thread at a safepoint"); |
0 | 1333 // Compute frame and register map based on thread and sp. |
1334 RegisterMap reg_map(thread, UseBiasedLocking); | |
1335 frame fr = thread->last_frame(); | |
1336 while (fr.id() != id) { | |
1337 fr = fr.sender(®_map); | |
1338 } | |
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1339 deoptimize(thread, fr, ®_map, reason); |
0 | 1340 } |
1341 | |
1342 | |
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changeset
|
1343 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1344 if (thread == Thread::current()) { |
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1345 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1346 } else { |
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1347 VM_DeoptimizeFrame deopt(thread, id, reason); |
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1348 VMThread::execute(&deopt); |
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1349 } |
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1350 } |
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1351 |
13188
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1352 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id) { |
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1353 deoptimize_frame(thread, id, Reason_constraint); |
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1354 } |
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1355 |
0 | 1356 // JVMTI PopFrame support |
1357 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
1358 { | |
1359 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
1360 } | |
1361 JRT_END | |
1362 | |
1363 | |
4978
99d3d8a72252
More ifdef GRAAL usage.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
4970
diff
changeset
|
1364 #if defined(COMPILER2) || defined(SHARK) || defined(GRAAL) |
0 | 1365 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
1366 // in case of an unresolved klass entry, load the class. | |
1367 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1368 Klass* tk = constant_pool->klass_at(index, CHECK); |
0 | 1369 return; |
1370 } | |
1371 | |
1372 if (!constant_pool->tag_at(index).is_symbol()) return; | |
1373 | |
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1374 Handle class_loader (THREAD, constant_pool->pool_holder()->class_loader()); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1375 Symbol* symbol = constant_pool->symbol_at(index); |
0 | 1376 |
1377 // class name? | |
1378 if (symbol->byte_at(0) != '(') { | |
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1379 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1380 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
1381 return; | |
1382 } | |
1383 | |
1384 // then it must be a signature! | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1385 ResourceMark rm(THREAD); |
0 | 1386 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
1387 if (ss.is_object()) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1388 Symbol* class_name = ss.as_symbol(CHECK); |
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1389 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1390 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
1391 } | |
1392 } | |
1393 } | |
1394 | |
1395 | |
1396 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
1397 EXCEPTION_MARK; | |
1398 load_class_by_index(constant_pool, index, THREAD); | |
1399 if (HAS_PENDING_EXCEPTION) { | |
1400 // Exception happened during classloading. We ignore the exception here, since it | |
14230
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1401 // is going to be rethrown since the current activation is going to be deoptimized and |
0 | 1402 // the interpreter will re-execute the bytecode. |
1403 CLEAR_PENDING_EXCEPTION; | |
14230
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1404 // Class loading called java code which may have caused a stack |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1405 // overflow. If the exception was thrown right before the return |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1406 // to the runtime the stack is no longer guarded. Reguard the |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1407 // stack otherwise if we return to the uncommon trap blob and the |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1408 // stack bang causes a stack overflow we crash. |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1409 assert(THREAD->is_Java_thread(), "only a java thread can be here"); |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1410 JavaThread* thread = (JavaThread*)THREAD; |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1411 bool guard_pages_enabled = thread->stack_yellow_zone_enabled(); |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1412 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1413 assert(guard_pages_enabled, "stack banging in uncommon trap blob may cause crash"); |
0 | 1414 } |
1415 } | |
1416 | |
1417 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
1418 HandleMark hm; | |
1419 | |
1420 // uncommon_trap() is called at the beginning of the uncommon trap | |
1421 // handler. Note this fact before we start generating temporary frames | |
1422 // that can confuse an asynchronous stack walker. This counter is | |
1423 // decremented at the end of unpack_frames(). | |
1424 thread->inc_in_deopt_handler(); | |
1425 | |
1426 // We need to update the map if we have biased locking. | |
6428
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1427 #ifdef GRAAL |
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1428 // (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
|
1429 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
|
1430 #else |
0 | 1431 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
|
1432 #endif |
0 | 1433 frame stub_frame = thread->last_frame(); |
1434 frame fr = stub_frame.sender(®_map); | |
1435 // Make sure the calling nmethod is not getting deoptimized and removed | |
1436 // before we are done with it. | |
1437 nmethodLocker nl(fr.pc()); | |
1438 | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4777
diff
changeset
|
1439 // 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
|
1440 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
|
1441 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
|
1442 |
0 | 1443 { |
1444 ResourceMark rm; | |
1445 | |
1446 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
1447 revoke_biases_of_monitors(thread, fr, ®_map); | |
1448 | |
1449 DeoptReason reason = trap_request_reason(trap_request); | |
1450 DeoptAction action = trap_request_action(trap_request); | |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1451 #ifdef GRAAL |
13857
a9604b40f5e7
On HotSpot, debug_id should be an int, not a short
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13768
diff
changeset
|
1452 int debug_id = trap_request_debug_id(trap_request); |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1453 #endif |
0 | 1454 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 |
1455 | |
1456 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
1457 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1458 | |
1459 nmethod* nm = cvf->code(); | |
1460 | |
1461 ScopeDesc* trap_scope = cvf->scope(); | |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1462 |
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1463 if (TraceDeoptimization) { |
19663
1f95f91dd1d6
Add ttyLocker to TraceDeoptimization output
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18712
diff
changeset
|
1464 ttyLocker ttyl; |
15652
3397e82e2f35
fix printing of pc in deopt message
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
15582
diff
changeset
|
1465 tty->print_cr(" bci=%d pc=" INTPTR_FORMAT ", relative_pc=%d, method=%s" GRAAL_ONLY(", debug_id=%d"), trap_scope->bci(), fr.pc(), fr.pc() - nm->code_begin(), trap_scope->method()->name_and_sig_as_C_string() |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1466 #ifdef GRAAL |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1467 , debug_id |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1468 #endif |
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1469 ); |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1470 } |
0 | 1471 |
1472 methodHandle trap_method = trap_scope->method(); | |
1473 int trap_bci = trap_scope->bci(); | |
13220
2b43fcc68add
Put _pending_deoptimization and _pending_monitorenter under ifdef GRAAL
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13216
diff
changeset
|
1474 #ifdef GRAAL |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1475 oop speculation = thread->pending_failed_speculation(); |
13713
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1476 if (nm->is_compiled_by_graal()) { |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1477 if (speculation != NULL) { |
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1478 oop speculation_log = nm->speculation_log(); |
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1479 if (speculation_log != NULL) { |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1480 if (TraceDeoptimization || TraceUncollectedSpeculations) { |
13642
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1481 if (SpeculationLog::lastFailed(speculation_log) != NULL) { |
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1482 tty->print_cr("A speculation that was not collected by the compiler is being overwritten"); |
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1483 } |
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1484 } |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1485 if (TraceDeoptimization) { |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1486 tty->print_cr("Saving speculation to speculation log"); |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1487 } |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1488 SpeculationLog::set_lastFailed(speculation_log, speculation); |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1489 } else { |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1490 if (TraceDeoptimization) { |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1491 tty->print_cr("Speculation present but no speculation log"); |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1492 } |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1493 } |
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1494 thread->set_pending_failed_speculation(NULL); |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1495 } else { |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1496 if (TraceDeoptimization) { |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1497 tty->print_cr("No speculation"); |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1498 } |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1499 } |
13713
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1500 } else { |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1501 #ifdef ASSERT |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1502 assert(speculation == NULL, "There should not be a speculation for method compiled by other compilers"); |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1503 #endif |
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1504 } |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1505 |
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1506 if (trap_bci == SynchronizationEntryBCI) { |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1507 trap_bci = 0; |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1508 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
|
1509 } |
16535
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1510 |
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1511 if (reason == Deoptimization::Reason_transfer_to_interpreter) { |
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1512 thread->set_pending_transfer_to_interpreter(true); |
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1513 } |
13220
2b43fcc68add
Put _pending_deoptimization and _pending_monitorenter under ifdef GRAAL
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13216
diff
changeset
|
1514 #endif |
16535
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1515 |
2142 | 1516 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
0 | 1517 |
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
|
1518 if (trap_scope->rethrow_exception()) { |
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
1519 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
|
1520 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
|
1521 } |
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
|
1522 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
|
1523 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
|
1524 ScopeValue* topOfStack = expressions->top(); |
8151
b8f261ba79c6
Minimize diff to plain HotSpot version.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8124
diff
changeset
|
1525 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
|
1526 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
|
1527 } |
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
|
1528 |
0 | 1529 // Record this event in the histogram. |
1530 gather_statistics(reason, action, trap_bc); | |
1531 | |
1532 // Ensure that we can record deopt. history: | |
17780 | 1533 // Need MDO to record RTM code generation state. |
1534 bool create_if_missing = ProfileTraps RTM_OPT_ONLY( || UseRTMLocking ); | |
0 | 1535 |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1536 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
|
1537 #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
|
1538 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
|
1539 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
|
1540 } else { |
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1541 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
|
1542 } |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1543 #else |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1544 profiled_method = trap_method; |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1545 #endif |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1546 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1547 MethodData* trap_mdo = |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1548 get_method_data(thread, profiled_method, create_if_missing); |
0 | 1549 |
7193
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1550 // Log a message |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1551 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
|
1552 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
|
1553 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
|
1554 |
0 | 1555 // Print a bunch of diagnostics, if requested. |
1556 if (TraceDeoptimization || LogCompilation) { | |
1557 ResourceMark rm; | |
1558 ttyLocker ttyl; | |
1559 char buf[100]; | |
1560 if (xtty != NULL) { | |
1561 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
1562 os::current_thread_id(), | |
1563 format_trap_request(buf, sizeof(buf), trap_request)); | |
1564 nm->log_identity(xtty); | |
1565 } | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1566 Symbol* class_name = NULL; |
0 | 1567 bool unresolved = false; |
1568 if (unloaded_class_index >= 0) { | |
1569 constantPoolHandle constants (THREAD, trap_method->constants()); | |
1570 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
|
1571 class_name = constants->klass_name_at(unloaded_class_index); |
0 | 1572 unresolved = true; |
1573 if (xtty != NULL) | |
1574 xtty->print(" unresolved='1'"); | |
1575 } 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
|
1576 class_name = constants->symbol_at(unloaded_class_index); |
0 | 1577 } |
1578 if (xtty != NULL) | |
1579 xtty->name(class_name); | |
1580 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1581 if (xtty != NULL && trap_mdo != NULL) { |
0 | 1582 // Dump the relevant MDO state. |
1583 // This is the deopt count for the current reason, any previous | |
1584 // reasons or recompiles seen at this point. | |
1585 int dcnt = trap_mdo->trap_count(reason); | |
1586 if (dcnt != 0) | |
1587 xtty->print(" count='%d'", dcnt); | |
1588 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
1589 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
1590 if (dos != 0) { | |
1591 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
1592 if (trap_state_is_recompiled(dos)) { | |
1593 int recnt2 = trap_mdo->overflow_recompile_count(); | |
1594 if (recnt2 != 0) | |
1595 xtty->print(" recompiles2='%d'", recnt2); | |
1596 } | |
1597 } | |
1598 } | |
1599 if (xtty != NULL) { | |
1600 xtty->stamp(); | |
1601 xtty->end_head(); | |
1602 } | |
1603 if (TraceDeoptimization) { // make noise on the tty | |
1604 tty->print("Uncommon trap occurred in"); | |
1605 nm->method()->print_short_name(tty); | |
19961
71040f48cc34
TraceDeoptimization: print compiler and compile_id
Gilles Duboscq <gilles.m.duboscq@oracle.com>
parents:
19663
diff
changeset
|
1606 tty->print(" compiler=%s compile_id=%d", nm->compiler() == NULL ? "" : nm->compiler()->name(), nm->compile_id()); |
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1607 #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
|
1608 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
|
1609 if (installedCode != NULL) { |
15161
2c940b1a48d8
Convert InstalledCode from an interface into an abstract class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
15104
diff
changeset
|
1610 oop installedCodeName = NULL; |
16401
347915b8cea8
Move name from HotSpotNmethod to InstalledCode to have a name again for truffle nmethods.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
16025
diff
changeset
|
1611 if (installedCode->is_a(InstalledCode::klass())) { |
347915b8cea8
Move name from HotSpotNmethod to InstalledCode to have a name again for truffle nmethods.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
16025
diff
changeset
|
1612 installedCodeName = InstalledCode::name(installedCode); |
15161
2c940b1a48d8
Convert InstalledCode from an interface into an abstract class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
15104
diff
changeset
|
1613 } |
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
|
1614 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
|
1615 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
|
1616 } 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
|
1617 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
|
1618 } |
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
|
1619 } 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
|
1620 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
|
1621 } |
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
|
1622 #endif //GRAAL |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1623 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d" GRAAL_ONLY(" debug_id=%d"), |
0 | 1624 fr.pc(), |
6843 | 1625 os::current_thread_id(), |
0 | 1626 trap_reason_name(reason), |
1627 trap_action_name(action), | |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1628 unloaded_class_index |
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1629 #ifdef GRAAL |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1630 , debug_id |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1631 #endif |
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1632 ); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1633 if (class_name != NULL) { |
0 | 1634 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
1635 class_name->print_symbol_on(tty); | |
1636 } | |
1637 tty->cr(); | |
1638 } | |
1639 if (xtty != NULL) { | |
1640 // Log the precise location of the trap. | |
1641 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
1642 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
1643 xtty->method(sd->method()); | |
1644 xtty->end_elem(); | |
1645 if (sd->is_top()) break; | |
1646 } | |
1647 xtty->tail("uncommon_trap"); | |
1648 } | |
1649 } | |
1650 // (End diagnostic printout.) | |
1651 | |
1652 // Load class if necessary | |
1653 if (unloaded_class_index >= 0) { | |
1654 constantPoolHandle constants(THREAD, trap_method->constants()); | |
1655 load_class_by_index(constants, unloaded_class_index); | |
1656 } | |
1657 | |
1658 // Flush the nmethod if necessary and desirable. | |
1659 // | |
1660 // We need to avoid situations where we are re-flushing the nmethod | |
1661 // because of a hot deoptimization site. Repeated flushes at the same | |
1662 // point need to be detected by the compiler and avoided. If the compiler | |
1663 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
1664 // module must take measures to avoid an infinite cycle of recompilation | |
1665 // and deoptimization. There are several such measures: | |
1666 // | |
1667 // 1. If a recompilation is ordered a second time at some site X | |
1668 // and for the same reason R, the action is adjusted to 'reinterpret', | |
1669 // to give the interpreter time to exercise the method more thoroughly. | |
1670 // If this happens, the method's overflow_recompile_count is incremented. | |
1671 // | |
1672 // 2. If the compiler fails to reduce the deoptimization rate, then | |
1673 // the method's overflow_recompile_count will begin to exceed the set | |
1674 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
1675 // is adjusted to 'make_not_compilable', and the method is abandoned | |
1676 // to the interpreter. This is a performance hit for hot methods, | |
1677 // but is better than a disastrous infinite cycle of recompilations. | |
1678 // (Actually, only the method containing the site X is abandoned.) | |
1679 // | |
1680 // 3. In parallel with the previous measures, if the total number of | |
1681 // recompilations of a method exceeds the much larger set limit | |
1682 // PerMethodRecompilationCutoff, the method is abandoned. | |
1683 // This should only happen if the method is very large and has | |
1684 // 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
|
1685 // limit is elsewhere (class nmethod, class Method). |
0 | 1686 // |
1687 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
1688 // to recompile at each bytecode independently of the per-BCI cutoff. | |
1689 // | |
1690 // The decision to update code is up to the compiler, and is encoded | |
1691 // in the Action_xxx code. If the compiler requests Action_none | |
1692 // no trap state is changed, no compiled code is changed, and the | |
1693 // computation suffers along in the interpreter. | |
1694 // | |
1695 // The other action codes specify various tactics for decompilation | |
1696 // and recompilation. Action_maybe_recompile is the loosest, and | |
1697 // allows the compiled code to stay around until enough traps are seen, | |
1698 // and until the compiler gets around to recompiling the trapping method. | |
1699 // | |
1700 // The other actions cause immediate removal of the present code. | |
1701 | |
1702 bool update_trap_state = true; | |
1703 bool make_not_entrant = false; | |
1704 bool make_not_compilable = false; | |
1783 | 1705 bool reprofile = false; |
0 | 1706 switch (action) { |
1707 case Action_none: | |
1708 // Keep the old code. | |
1709 update_trap_state = false; | |
1710 break; | |
1711 case Action_maybe_recompile: | |
1712 // Do not need to invalidate the present code, but we can | |
1713 // initiate another | |
1714 // Start compiler without (necessarily) invalidating the nmethod. | |
1715 // The system will tolerate the old code, but new code should be | |
1716 // generated when possible. | |
1717 break; | |
1718 case Action_reinterpret: | |
1719 // Go back into the interpreter for a while, and then consider | |
1720 // recompiling form scratch. | |
1721 make_not_entrant = true; | |
1722 // Reset invocation counter for outer most method. | |
1723 // This will allow the interpreter to exercise the bytecodes | |
1724 // for a while before recompiling. | |
1725 // By contrast, Action_make_not_entrant is immediate. | |
1726 // | |
1727 // Note that the compiler will track null_check, null_assert, | |
1728 // range_check, and class_check events and log them as if they | |
1729 // had been traps taken from compiled code. This will update | |
1730 // the MDO trap history so that the next compilation will | |
1731 // properly detect hot trap sites. | |
1783 | 1732 reprofile = true; |
0 | 1733 break; |
1734 case Action_make_not_entrant: | |
1735 // Request immediate recompilation, and get rid of the old code. | |
1736 // Make them not entrant, so next time they are called they get | |
1737 // recompiled. Unloaded classes are loaded now so recompile before next | |
1738 // time they are called. Same for uninitialized. The interpreter will | |
1739 // link the missing class, if any. | |
1740 make_not_entrant = true; | |
1741 break; | |
1742 case Action_make_not_compilable: | |
1743 // Give up on compiling this method at all. | |
1744 make_not_entrant = true; | |
1745 make_not_compilable = true; | |
1746 break; | |
1747 default: | |
1748 ShouldNotReachHere(); | |
1749 } | |
1750 | |
1751 // Setting +ProfileTraps fixes the following, on all platforms: | |
1752 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
1753 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
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1754 // recompile relies on a MethodData* to record heroic opt failures. |
0 | 1755 |
1756 // Whether the interpreter is producing MDO data or not, we also need | |
1757 // to use the MDO to detect hot deoptimization points and control | |
1758 // aggressive optimization. | |
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1759 bool inc_recompile_count = false; |
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1760 ProfileData* pdata = NULL; |
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1761 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
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1762 assert(trap_mdo == get_method_data(thread, profiled_method, false), "sanity"); |
0 | 1763 uint this_trap_count = 0; |
1764 bool maybe_prior_trap = false; | |
1765 bool maybe_prior_recompile = false; | |
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1766 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
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1767 #ifdef GRAAL |
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1768 nm->is_compiled_by_graal() && nm->is_osr_method(), |
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1769 #endif |
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1770 nm->method(), |
0 | 1771 //outputs: |
1772 this_trap_count, | |
1773 maybe_prior_trap, | |
1774 maybe_prior_recompile); | |
1775 // Because the interpreter also counts null, div0, range, and class | |
1776 // checks, these traps from compiled code are double-counted. | |
1777 // This is harmless; it just means that the PerXTrapLimit values | |
1778 // are in effect a little smaller than they look. | |
1779 | |
1780 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
1781 if (per_bc_reason != Reason_none) { | |
1782 // Now take action based on the partially known per-BCI history. | |
1783 if (maybe_prior_trap | |
1784 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
1785 // If there are too many traps at this BCI, force a recompile. | |
1786 // This will allow the compiler to see the limit overflow, and | |
1787 // take corrective action, if possible. The compiler generally | |
1788 // does not use the exact PerBytecodeTrapLimit value, but instead | |
1789 // changes its tactics if it sees any traps at all. This provides | |
1790 // a little hysteresis, delaying a recompile until a trap happens | |
1791 // several times. | |
1792 // | |
1793 // Actually, since there is only one bit of counter per BCI, | |
1794 // the possible per-BCI counts are {0,1,(per-method count)}. | |
1795 // This produces accurate results if in fact there is only | |
1796 // one hot trap site, but begins to get fuzzy if there are | |
1797 // many sites. For example, if there are ten sites each | |
1798 // trapping two or more times, they each get the blame for | |
1799 // all of their traps. | |
1800 make_not_entrant = true; | |
1801 } | |
1802 | |
1803 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
1804 if (make_not_entrant && maybe_prior_recompile) { | |
1805 // More than one recompile at this point. | |
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1806 inc_recompile_count = maybe_prior_trap; |
0 | 1807 } |
1808 } else { | |
1809 // For reasons which are not recorded per-bytecode, we simply | |
1810 // force recompiles unconditionally. | |
1811 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
1812 make_not_entrant = true; | |
1813 } | |
1814 | |
1815 // Go back to the compiler if there are too many traps in this method. | |
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1816 if (this_trap_count >= per_method_trap_limit(reason)) { |
0 | 1817 // If there are too many traps in this method, force a recompile. |
1818 // This will allow the compiler to see the limit overflow, and | |
1819 // take corrective action, if possible. | |
1820 // (This condition is an unlikely backstop only, because the | |
1821 // PerBytecodeTrapLimit is more likely to take effect first, | |
1822 // if it is applicable.) | |
1823 make_not_entrant = true; | |
1824 } | |
1825 | |
1826 // Here's more hysteresis: If there has been a recompile at | |
1827 // this trap point already, run the method in the interpreter | |
1828 // for a while to exercise it more thoroughly. | |
1829 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
1783 | 1830 reprofile = true; |
0 | 1831 } |
1832 | |
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1833 } |
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1834 |
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1835 // Take requested actions on the method: |
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1836 |
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1837 // Recompile |
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1838 if (make_not_entrant) { |
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1839 if (!nm->make_not_entrant()) { |
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1840 return; // the call did not change nmethod's state |
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1841 } |
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1842 |
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1843 if (pdata != NULL) { |
0 | 1844 // Record the recompilation event, if any. |
1845 int tstate0 = pdata->trap_state(); | |
1846 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
1847 if (tstate1 != tstate0) | |
1848 pdata->set_trap_state(tstate1); | |
1849 } | |
17780 | 1850 |
1851 #if INCLUDE_RTM_OPT | |
1852 // Restart collecting RTM locking abort statistic if the method | |
1853 // is recompiled for a reason other than RTM state change. | |
1854 // Assume that in new recompiled code the statistic could be different, | |
1855 // for example, due to different inlining. | |
1856 if ((reason != Reason_rtm_state_change) && (trap_mdo != NULL) && | |
1857 UseRTMDeopt && (nm->rtm_state() != ProfileRTM)) { | |
1858 trap_mdo->atomic_set_rtm_state(ProfileRTM); | |
1859 } | |
1860 #endif | |
0 | 1861 } |
1862 | |
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1863 if (inc_recompile_count) { |
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1864 trap_mdo->inc_overflow_recompile_count(); |
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1865 if ((uint)trap_mdo->overflow_recompile_count() > |
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1866 (uint)PerBytecodeRecompilationCutoff) { |
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1867 // Give up on the method containing the bad BCI. |
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1868 if (trap_method() == nm->method()) { |
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1869 make_not_compilable = true; |
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1870 } else { |
7998 | 1871 trap_method->set_not_compilable(CompLevel_full_optimization, true, "overflow_recompile_count > PerBytecodeRecompilationCutoff"); |
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1872 // But give grace to the enclosing nm->method(). |
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1873 } |
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1874 } |
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1875 } |
0 | 1876 |
1783 | 1877 // Reprofile |
1878 if (reprofile) { | |
1879 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
0 | 1880 } |
1881 | |
1882 // Give up compiling | |
1783 | 1883 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
0 | 1884 assert(make_not_entrant, "consistent"); |
1783 | 1885 nm->method()->set_not_compilable(CompLevel_full_optimization); |
0 | 1886 } |
1887 | |
1888 } // Free marked resources | |
1889 | |
1890 } | |
1891 JRT_END | |
1892 | |
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1893 MethodData* |
0 | 1894 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
1895 bool create_if_missing) { | |
1896 Thread* THREAD = thread; | |
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1897 MethodData* mdo = m()->method_data(); |
0 | 1898 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
1899 // Build an MDO. Ignore errors like OutOfMemory; | |
1900 // that simply means we won't have an MDO to update. | |
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1901 Method::build_interpreter_method_data(m, THREAD); |
0 | 1902 if (HAS_PENDING_EXCEPTION) { |
1903 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
1904 CLEAR_PENDING_EXCEPTION; | |
1905 } | |
1906 mdo = m()->method_data(); | |
1907 } | |
1908 return mdo; | |
1909 } | |
1910 | |
1911 ProfileData* | |
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1912 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
0 | 1913 int trap_bci, |
1914 Deoptimization::DeoptReason reason, | |
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1915 bool update_total_trap_count, |
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1916 #ifdef GRAAL |
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1917 bool is_osr, |
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1918 #endif |
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1919 Method* compiled_method, |
0 | 1920 //outputs: |
1921 uint& ret_this_trap_count, | |
1922 bool& ret_maybe_prior_trap, | |
1923 bool& ret_maybe_prior_recompile) { | |
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1924 bool maybe_prior_trap = false; |
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1925 bool maybe_prior_recompile = false; |
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1926 uint this_trap_count = 0; |
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1927 if (update_total_trap_count) { |
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1928 uint idx = reason; |
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1929 #ifdef GRAAL |
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1930 if (is_osr) { |
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1931 idx += Reason_LIMIT; |
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1932 } |
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1933 #endif |
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1934 uint prior_trap_count = trap_mdo->trap_count(idx); |
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1935 this_trap_count = trap_mdo->inc_trap_count(idx); |
0 | 1936 |
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1937 // If the runtime cannot find a place to store trap history, |
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1938 // it is estimated based on the general condition of the method. |
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1939 // If the method has ever been recompiled, or has ever incurred |
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1940 // a trap with the present reason , then this BCI is assumed |
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1941 // (pessimistically) to be the culprit. |
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1942 maybe_prior_trap = (prior_trap_count != 0); |
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1943 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1944 } |
0 | 1945 ProfileData* pdata = NULL; |
1946 | |
1947 | |
1948 // For reasons which are recorded per bytecode, we check per-BCI data. | |
1949 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
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1950 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
0 | 1951 if (per_bc_reason != Reason_none) { |
1952 // Find the profile data for this BCI. If there isn't one, | |
1953 // try to allocate one from the MDO's set of spares. | |
1954 // This will let us detect a repeated trap at this point. | |
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1955 pdata = trap_mdo->allocate_bci_to_data(trap_bci, reason_is_speculate(reason) ? compiled_method : NULL); |
0 | 1956 |
1957 if (pdata != NULL) { | |
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1958 if (reason_is_speculate(reason) && !pdata->is_SpeculativeTrapData()) { |
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1959 if (LogCompilation && xtty != NULL) { |
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1960 ttyLocker ttyl; |
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1961 // no more room for speculative traps in this MDO |
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1962 xtty->elem("speculative_traps_oom"); |
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1963 } |
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1964 } |
0 | 1965 // Query the trap state of this profile datum. |
1966 int tstate0 = pdata->trap_state(); | |
1967 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
1968 maybe_prior_trap = false; | |
1969 if (!trap_state_is_recompiled(tstate0)) | |
1970 maybe_prior_recompile = false; | |
1971 | |
1972 // Update the trap state of this profile datum. | |
1973 int tstate1 = tstate0; | |
1974 // Record the reason. | |
1975 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
1976 // Store the updated state on the MDO, for next time. | |
1977 if (tstate1 != tstate0) | |
1978 pdata->set_trap_state(tstate1); | |
1979 } else { | |
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1980 if (LogCompilation && xtty != NULL) { |
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1981 ttyLocker ttyl; |
0 | 1982 // Missing MDP? Leave a small complaint in the log. |
1983 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1984 } |
0 | 1985 } |
1986 } | |
1987 | |
1988 // Return results: | |
1989 ret_this_trap_count = this_trap_count; | |
1990 ret_maybe_prior_trap = maybe_prior_trap; | |
1991 ret_maybe_prior_recompile = maybe_prior_recompile; | |
1992 return pdata; | |
1993 } | |
1994 | |
1995 void | |
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1996 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 1997 ResourceMark rm; |
1998 // Ignored outputs: | |
1999 uint ignore_this_trap_count; | |
2000 bool ignore_maybe_prior_trap; | |
2001 bool ignore_maybe_prior_recompile; | |
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2002 assert(!reason_is_speculate(reason), "reason speculate only used by compiler"); |
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2003 // Graal uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
5130 | 2004 bool update_total_counts = GRAAL_ONLY(false) NOT_GRAAL(true); |
0 | 2005 query_update_method_data(trap_mdo, trap_bci, |
2006 (DeoptReason)reason, | |
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2007 update_total_counts, |
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2008 #ifdef GRAAL |
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|
2009 false, |
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2010 #endif |
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2011 NULL, |
0 | 2012 ignore_this_trap_count, |
2013 ignore_maybe_prior_trap, | |
2014 ignore_maybe_prior_recompile); | |
2015 } | |
2016 | |
2017 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request) { | |
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2018 if (TraceDeoptimization) { |
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2019 tty->print("Uncommon trap "); |
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2020 } |
0 | 2021 // Still in Java no safepoints |
2022 { | |
2023 // This enters VM and may safepoint | |
2024 uncommon_trap_inner(thread, trap_request); | |
2025 } | |
2026 return fetch_unroll_info_helper(thread); | |
2027 } | |
2028 | |
2029 // Local derived constants. | |
2030 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
2031 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
2032 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
2033 | |
2034 //---------------------------trap_state_reason--------------------------------- | |
2035 Deoptimization::DeoptReason | |
2036 Deoptimization::trap_state_reason(int trap_state) { | |
2037 // This assert provides the link between the width of DataLayout::trap_bits | |
2038 // and the encoding of "recorded" reasons. It ensures there are enough | |
2039 // bits to store all needed reasons in the per-BCI MDO profile. | |
2040 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
2041 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
2042 trap_state -= recompile_bit; | |
2043 if (trap_state == DS_REASON_MASK) { | |
2044 return Reason_many; | |
2045 } else { | |
2046 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
2047 return (DeoptReason)trap_state; | |
2048 } | |
2049 } | |
2050 //-------------------------trap_state_has_reason------------------------------- | |
2051 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
2052 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
2053 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
2054 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
2055 trap_state -= recompile_bit; | |
2056 if (trap_state == DS_REASON_MASK) { | |
2057 return -1; // true, unspecifically (bottom of state lattice) | |
2058 } else if (trap_state == reason) { | |
2059 return 1; // true, definitely | |
2060 } else if (trap_state == 0) { | |
2061 return 0; // false, definitely (top of state lattice) | |
2062 } else { | |
2063 return 0; // false, definitely | |
2064 } | |
2065 } | |
2066 //-------------------------trap_state_add_reason------------------------------- | |
2067 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
2068 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
2069 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
2070 trap_state -= recompile_bit; | |
2071 if (trap_state == DS_REASON_MASK) { | |
2072 return trap_state + recompile_bit; // already at state lattice bottom | |
2073 } else if (trap_state == reason) { | |
2074 return trap_state + recompile_bit; // the condition is already true | |
2075 } else if (trap_state == 0) { | |
2076 return reason + recompile_bit; // no condition has yet been true | |
2077 } else { | |
2078 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
2079 } | |
2080 } | |
2081 //-----------------------trap_state_is_recompiled------------------------------ | |
2082 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
2083 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
2084 } | |
2085 //-----------------------trap_state_set_recompiled----------------------------- | |
2086 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
2087 if (z) return trap_state | DS_RECOMPILE_BIT; | |
2088 else return trap_state & ~DS_RECOMPILE_BIT; | |
2089 } | |
2090 //---------------------------format_trap_state--------------------------------- | |
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2091 // This is used for debugging and diagnostics, including LogFile output. |
0 | 2092 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, |
2093 int trap_state) { | |
2094 DeoptReason reason = trap_state_reason(trap_state); | |
2095 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
2096 // Re-encode the state from its decoded components. | |
2097 int decoded_state = 0; | |
2098 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
2099 decoded_state = trap_state_add_reason(decoded_state, reason); | |
2100 if (recomp_flag) | |
2101 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
2102 // If the state re-encodes properly, format it symbolically. | |
2103 // Because this routine is used for debugging and diagnostics, | |
2104 // be robust even if the state is a strange value. | |
2105 size_t len; | |
2106 if (decoded_state != trap_state) { | |
2107 // Random buggy state that doesn't decode?? | |
2108 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
2109 } else { | |
2110 len = jio_snprintf(buf, buflen, "%s%s", | |
2111 trap_reason_name(reason), | |
2112 recomp_flag ? " recompiled" : ""); | |
2113 } | |
2114 if (len >= buflen) | |
2115 buf[buflen-1] = '\0'; | |
2116 return buf; | |
2117 } | |
2118 | |
2119 | |
2120 //--------------------------------statics-------------------------------------- | |
2121 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
2122 = Deoptimization::Action_reinterpret; | |
2123 const char* Deoptimization::_trap_reason_name[Reason_LIMIT] = { | |
2124 // Note: Keep this in sync. with enum DeoptReason. | |
2125 "none", | |
2126 "null_check", | |
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2127 "null_assert" GRAAL_ONLY("_or_unreached0"), |
0 | 2128 "range_check", |
2129 "class_check", | |
2130 "array_check", | |
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2131 "intrinsic" GRAAL_ONLY("_or_type_checked_inlining"), |
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2132 "bimorphic" GRAAL_ONLY("_or_optimized_type_check"), |
0 | 2133 "unloaded", |
2134 "uninitialized", | |
2135 "unreached", | |
2136 "unhandled", | |
2137 "constraint", | |
2138 "div0_check", | |
1172 | 2139 "age", |
3345 | 2140 "predicate", |
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2141 "loop_limit_check", |
17780 | 2142 "speculate_class_check", |
20439
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2143 "rtm_state_change", |
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2144 "unstable_if" |
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2145 #ifdef GRAAL |
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2146 "aliasing", |
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2147 "transfer_to_interpreter", |
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2148 "not_compiled_exception_handler", |
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2149 "unresolved", |
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2150 "jsr_mismatch" |
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2151 #endif |
0 | 2152 }; |
2153 const char* Deoptimization::_trap_action_name[Action_LIMIT] = { | |
2154 // Note: Keep this in sync. with enum DeoptAction. | |
2155 "none", | |
2156 "maybe_recompile", | |
2157 "reinterpret", | |
2158 "make_not_entrant", | |
2159 "make_not_compilable" | |
2160 }; | |
2161 | |
2162 const char* Deoptimization::trap_reason_name(int reason) { | |
2163 if (reason == Reason_many) return "many"; | |
2164 if ((uint)reason < Reason_LIMIT) | |
2165 return _trap_reason_name[reason]; | |
2166 static char buf[20]; | |
2167 sprintf(buf, "reason%d", reason); | |
2168 return buf; | |
2169 } | |
2170 const char* Deoptimization::trap_action_name(int action) { | |
2171 if ((uint)action < Action_LIMIT) | |
2172 return _trap_action_name[action]; | |
2173 static char buf[20]; | |
2174 sprintf(buf, "action%d", action); | |
2175 return buf; | |
2176 } | |
2177 | |
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2178 // This is used for debugging and diagnostics, including LogFile output. |
0 | 2179 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, |
2180 int trap_request) { | |
2181 jint unloaded_class_index = trap_request_index(trap_request); | |
2182 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
2183 const char* action = trap_action_name(trap_request_action(trap_request)); | |
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2184 #ifdef GRAAL |
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2185 int debug_id = trap_request_debug_id(trap_request); |
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2186 #endif |
0 | 2187 size_t len; |
2188 if (unloaded_class_index < 0) { | |
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2189 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'" GRAAL_ONLY(" debug_id='%d'"), |
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2190 reason, action |
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2191 #ifdef GRAAL |
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Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
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2192 ,debug_id |
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2193 #endif |
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2194 ); |
0 | 2195 } else { |
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|
2196 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'" GRAAL_ONLY(" debug_id='%d'"), |
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2197 reason, action, unloaded_class_index |
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2198 #ifdef GRAAL |
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2199 ,debug_id |
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2200 #endif |
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2201 ); |
0 | 2202 } |
2203 if (len >= buflen) | |
2204 buf[buflen-1] = '\0'; | |
2205 return buf; | |
2206 } | |
2207 | |
2208 juint Deoptimization::_deoptimization_hist | |
2209 [Deoptimization::Reason_LIMIT] | |
2210 [1 + Deoptimization::Action_LIMIT] | |
2211 [Deoptimization::BC_CASE_LIMIT] | |
2212 = {0}; | |
2213 | |
2214 enum { | |
2215 LSB_BITS = 8, | |
2216 LSB_MASK = right_n_bits(LSB_BITS) | |
2217 }; | |
2218 | |
2219 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2220 Bytecodes::Code bc) { | |
2221 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
2222 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
2223 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
2224 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
2225 juint* cases = _deoptimization_hist[reason][1+action]; | |
2226 juint* bc_counter_addr = NULL; | |
2227 juint bc_counter = 0; | |
2228 // Look for an unused counter, or an exact match to this BC. | |
2229 if (bc != Bytecodes::_illegal) { | |
2230 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
2231 juint* counter_addr = &cases[bc_case]; | |
2232 juint counter = *counter_addr; | |
2233 if ((counter == 0 && bc_counter_addr == NULL) | |
2234 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
2235 // this counter is either free or is already devoted to this BC | |
2236 bc_counter_addr = counter_addr; | |
2237 bc_counter = counter | bc; | |
2238 } | |
2239 } | |
2240 } | |
2241 if (bc_counter_addr == NULL) { | |
2242 // Overflow, or no given bytecode. | |
2243 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
2244 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
2245 } | |
2246 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
2247 } | |
2248 | |
2249 jint Deoptimization::total_deoptimization_count() { | |
2250 return _deoptimization_hist[Reason_none][0][0]; | |
2251 } | |
2252 | |
2253 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
2254 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
2255 return _deoptimization_hist[reason][0][0]; | |
2256 } | |
2257 | |
2258 void Deoptimization::print_statistics() { | |
2259 juint total = total_deoptimization_count(); | |
2260 juint account = total; | |
2261 if (total != 0) { | |
2262 ttyLocker ttyl; | |
2263 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
2264 tty->print_cr("Deoptimization traps recorded:"); | |
2265 #define PRINT_STAT_LINE(name, r) \ | |
2266 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
2267 PRINT_STAT_LINE("total", total); | |
2268 // For each non-zero entry in the histogram, print the reason, | |
2269 // the action, and (if specifically known) the type of bytecode. | |
2270 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
2271 for (int action = 0; action < Action_LIMIT; action++) { | |
2272 juint* cases = _deoptimization_hist[reason][1+action]; | |
2273 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
2274 juint counter = cases[bc_case]; | |
2275 if (counter != 0) { | |
2276 char name[1*K]; | |
2277 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
2278 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
2279 bc = Bytecodes::_illegal; | |
2280 sprintf(name, "%s/%s/%s", | |
2281 trap_reason_name(reason), | |
2282 trap_action_name(action), | |
2283 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
2284 juint r = counter >> LSB_BITS; | |
2285 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
2286 account -= r; | |
2287 } | |
2288 } | |
2289 } | |
2290 } | |
2291 if (account != 0) { | |
2292 PRINT_STAT_LINE("unaccounted", account); | |
2293 } | |
2294 #undef PRINT_STAT_LINE | |
2295 if (xtty != NULL) xtty->tail("statistics"); | |
2296 } | |
2297 } | |
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|
2298 #else // COMPILER2 || SHARK || GRAAL |
0 | 2299 |
2300 | |
2301 // Stubs for C1 only system. | |
2302 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
2303 return false; | |
2304 } | |
2305 | |
2306 const char* Deoptimization::trap_reason_name(int reason) { | |
2307 return "unknown"; | |
2308 } | |
2309 | |
2310 void Deoptimization::print_statistics() { | |
2311 // no output | |
2312 } | |
2313 | |
2314 void | |
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2315 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 2316 // no udpate |
2317 } | |
2318 | |
2319 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
2320 return 0; | |
2321 } | |
2322 | |
2323 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2324 Bytecodes::Code bc) { | |
2325 // no update | |
2326 } | |
2327 | |
2328 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
2329 int trap_state) { | |
2330 jio_snprintf(buf, buflen, "#%d", trap_state); | |
2331 return buf; | |
2332 } | |
2333 | |
4978
99d3d8a72252
More ifdef GRAAL usage.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
4970
diff
changeset
|
2334 #endif // COMPILER2 || SHARK || GRAAL |