Mercurial > hg > truffle
annotate src/share/vm/runtime/deoptimization.cpp @ 9093:cd22923e7ca7
removed unnecessary code
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 12 Apr 2013 21:35:27 +0200 |
parents | b9a918201d47 |
children | 314814fa0223 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "code/debugInfoRec.hpp" | |
28 #include "code/nmethod.hpp" | |
29 #include "code/pcDesc.hpp" | |
30 #include "code/scopeDesc.hpp" | |
31 #include "interpreter/bytecode.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "memory/allocation.inline.hpp" | |
35 #include "memory/oopFactory.hpp" | |
36 #include "memory/resourceArea.hpp" | |
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37 #include "oops/method.hpp" |
1972 | 38 #include "oops/oop.inline.hpp" |
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39 #include "oops/fieldStreams.hpp" |
1972 | 40 #include "prims/jvmtiThreadState.hpp" |
41 #include "runtime/biasedLocking.hpp" | |
42 #include "runtime/compilationPolicy.hpp" | |
43 #include "runtime/deoptimization.hpp" | |
44 #include "runtime/interfaceSupport.hpp" | |
45 #include "runtime/sharedRuntime.hpp" | |
46 #include "runtime/signature.hpp" | |
47 #include "runtime/stubRoutines.hpp" | |
48 #include "runtime/thread.hpp" | |
49 #include "runtime/vframe.hpp" | |
50 #include "runtime/vframeArray.hpp" | |
51 #include "runtime/vframe_hp.hpp" | |
52 #include "utilities/events.hpp" | |
53 #include "utilities/xmlstream.hpp" | |
54 #ifdef TARGET_ARCH_x86 | |
55 # include "vmreg_x86.inline.hpp" | |
56 #endif | |
57 #ifdef TARGET_ARCH_sparc | |
58 # include "vmreg_sparc.inline.hpp" | |
59 #endif | |
60 #ifdef TARGET_ARCH_zero | |
61 # include "vmreg_zero.inline.hpp" | |
62 #endif | |
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63 #ifdef TARGET_ARCH_arm |
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64 # include "vmreg_arm.inline.hpp" |
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65 #endif |
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66 #ifdef TARGET_ARCH_ppc |
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67 # include "vmreg_ppc.inline.hpp" |
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68 #endif |
1972 | 69 #ifdef COMPILER2 |
70 #ifdef TARGET_ARCH_MODEL_x86_32 | |
71 # include "adfiles/ad_x86_32.hpp" | |
72 #endif | |
73 #ifdef TARGET_ARCH_MODEL_x86_64 | |
74 # include "adfiles/ad_x86_64.hpp" | |
75 #endif | |
76 #ifdef TARGET_ARCH_MODEL_sparc | |
77 # include "adfiles/ad_sparc.hpp" | |
78 #endif | |
79 #ifdef TARGET_ARCH_MODEL_zero | |
80 # include "adfiles/ad_zero.hpp" | |
81 #endif | |
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82 #ifdef TARGET_ARCH_MODEL_arm |
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83 # include "adfiles/ad_arm.hpp" |
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84 #endif |
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85 #ifdef TARGET_ARCH_MODEL_ppc |
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86 # include "adfiles/ad_ppc.hpp" |
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87 #endif |
1972 | 88 #endif |
0 | 89 |
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90 #ifdef GRAAL |
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91 #include "graal/graalCompiler.hpp" |
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92 #endif |
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93 |
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94 |
0 | 95 bool DeoptimizationMarker::_is_active = false; |
96 | |
97 Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, | |
98 int caller_adjustment, | |
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99 int caller_actual_parameters, |
0 | 100 int number_of_frames, |
101 intptr_t* frame_sizes, | |
102 address* frame_pcs, | |
103 BasicType return_type) { | |
104 _size_of_deoptimized_frame = size_of_deoptimized_frame; | |
105 _caller_adjustment = caller_adjustment; | |
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106 _caller_actual_parameters = caller_actual_parameters; |
0 | 107 _number_of_frames = number_of_frames; |
108 _frame_sizes = frame_sizes; | |
109 _frame_pcs = frame_pcs; | |
6197 | 110 _register_block = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2, mtCompiler); |
0 | 111 _return_type = return_type; |
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112 _initial_info = 0; |
0 | 113 // PD (x86 only) |
114 _counter_temp = 0; | |
115 _unpack_kind = 0; | |
116 _sender_sp_temp = 0; | |
117 | |
118 _total_frame_sizes = size_of_frames(); | |
119 } | |
120 | |
121 | |
122 Deoptimization::UnrollBlock::~UnrollBlock() { | |
6197 | 123 FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes, mtCompiler); |
124 FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs, mtCompiler); | |
125 FREE_C_HEAP_ARRAY(intptr_t, _register_block, mtCompiler); | |
0 | 126 } |
127 | |
128 | |
129 intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const { | |
130 assert(register_number < RegisterMap::reg_count, "checking register number"); | |
131 return &_register_block[register_number * 2]; | |
132 } | |
133 | |
134 | |
135 | |
136 int Deoptimization::UnrollBlock::size_of_frames() const { | |
137 // Acount first for the adjustment of the initial frame | |
138 int result = _caller_adjustment; | |
139 for (int index = 0; index < number_of_frames(); index++) { | |
140 result += frame_sizes()[index]; | |
141 } | |
142 return result; | |
143 } | |
144 | |
145 | |
146 void Deoptimization::UnrollBlock::print() { | |
147 ttyLocker ttyl; | |
148 tty->print_cr("UnrollBlock"); | |
149 tty->print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame); | |
150 tty->print( " frame_sizes: "); | |
151 for (int index = 0; index < number_of_frames(); index++) { | |
152 tty->print("%d ", frame_sizes()[index]); | |
153 } | |
154 tty->cr(); | |
155 } | |
156 | |
157 | |
158 // In order to make fetch_unroll_info work properly with escape | |
159 // analysis, The method was changed from JRT_LEAF to JRT_BLOCK_ENTRY and | |
160 // ResetNoHandleMark and HandleMark were removed from it. The actual reallocation | |
161 // of previously eliminated objects occurs in realloc_objects, which is | |
162 // called from the method fetch_unroll_info_helper below. | |
163 JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* thread)) | |
164 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
165 // but makes the entry a little slower. There is however a little dance we have to | |
166 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
167 | |
168 // fetch_unroll_info() is called at the beginning of the deoptimization | |
169 // handler. Note this fact before we start generating temporary frames | |
170 // that can confuse an asynchronous stack walker. This counter is | |
171 // decremented at the end of unpack_frames(). | |
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172 if (TraceDeoptimization) { |
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173 tty->print_cr("Deoptimizing thread " INTPTR_FORMAT, thread); |
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174 } |
0 | 175 thread->inc_in_deopt_handler(); |
176 | |
177 return fetch_unroll_info_helper(thread); | |
178 JRT_END | |
179 | |
180 | |
181 // This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap) | |
182 Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* thread) { | |
183 | |
184 // Note: there is a safepoint safety issue here. No matter whether we enter | |
185 // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once | |
186 // the vframeArray is created. | |
187 // | |
188 | |
189 // Allocate our special deoptimization ResourceMark | |
190 DeoptResourceMark* dmark = new DeoptResourceMark(thread); | |
191 assert(thread->deopt_mark() == NULL, "Pending deopt!"); | |
192 thread->set_deopt_mark(dmark); | |
193 | |
194 frame stub_frame = thread->last_frame(); // Makes stack walkable as side effect | |
195 RegisterMap map(thread, true); | |
196 RegisterMap dummy_map(thread, false); | |
197 // Now get the deoptee with a valid map | |
198 frame deoptee = stub_frame.sender(&map); | |
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199 // Set the deoptee nmethod |
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200 assert(thread->deopt_nmethod() == NULL, "Pending deopt!"); |
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201 thread->set_deopt_nmethod(deoptee.cb()->as_nmethod_or_null()); |
0 | 202 |
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203 if (VerifyStack) { |
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204 thread->validate_frame_layout(); |
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205 } |
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206 |
0 | 207 // Create a growable array of VFrames where each VFrame represents an inlined |
208 // Java frame. This storage is allocated with the usual system arena. | |
209 assert(deoptee.is_compiled_frame(), "Wrong frame type"); | |
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210 |
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211 #ifdef GRAAL |
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212 nmethod* nm = (nmethod*) deoptee.cb(); |
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213 GraalCompiler* compiler = (GraalCompiler*) nm->compiler(); |
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214 for (jlong* p = nm->leaf_graph_ids_begin(); p != nm->leaf_graph_ids_end(); p++) { |
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215 compiler->deopt_leaf_graph(*p); |
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216 } |
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217 if (PrintDeoptimizationDetails) { |
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218 tty->print("leaf graph ids: "); |
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219 for (jlong* p = nm->leaf_graph_ids_begin(); p != nm->leaf_graph_ids_end(); p++) { |
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220 tty->print("%d ", *p); |
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221 } |
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222 tty->cr(); |
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223 } |
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224 #endif |
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225 |
0 | 226 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); |
227 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
228 while (!vf->is_top()) { | |
229 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
230 chunk->push(compiledVFrame::cast(vf)); | |
231 vf = vf->sender(); | |
232 } | |
233 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
234 chunk->push(compiledVFrame::cast(vf)); | |
235 | |
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236 #if defined(COMPILER2) || defined(GRAAL) |
0 | 237 // Reallocate the non-escaping objects and restore their fields. Then |
238 // relock objects if synchronization on them was eliminated. | |
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239 #ifdef COMPILER2 |
4777 | 240 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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241 if (EliminateAllocations) { |
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242 #endif // COMPILER2 |
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243 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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244 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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245 |
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246 // The flag return_oop() indicates call sites which return oop |
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247 // in compiled code. Such sites include java method calls, |
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248 // runtime calls (for example, used to allocate new objects/arrays |
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249 // on slow code path) and any other calls generated in compiled code. |
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250 // It is not guaranteed that we can get such information here only |
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251 // by analyzing bytecode in deoptimized frames. This is why this flag |
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252 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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253 bool save_oop_result = chunk->at(0)->scope()->return_oop(); |
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254 Handle return_value; |
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255 if (save_oop_result) { |
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256 // Reallocation may trigger GC. If deoptimization happened on return from |
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257 // call which returns oop we need to save it since it is not in oopmap. |
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258 oop result = deoptee.saved_oop_result(&map); |
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259 assert(result == NULL || result->is_oop(), "must be oop"); |
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260 return_value = Handle(thread, result); |
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261 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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262 if (TraceDeoptimization) { |
6843 | 263 ttyLocker ttyl; |
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264 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, result, thread); |
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265 } |
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266 } |
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267 bool reallocated = false; |
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268 if (objects != NULL) { |
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269 JRT_BLOCK |
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270 reallocated = realloc_objects(thread, &deoptee, objects, THREAD); |
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271 JRT_END |
0 | 272 } |
44
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273 if (reallocated) { |
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274 reassign_fields(&deoptee, &map, objects); |
0 | 275 #ifndef PRODUCT |
276 if (TraceDeoptimization) { | |
277 ttyLocker ttyl; | |
44
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278 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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279 print_objects(objects); |
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280 } |
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281 #endif |
44
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282 } |
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283 if (save_oop_result) { |
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284 // Restore result. |
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285 deoptee.set_saved_oop_result(&map, return_value()); |
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286 } |
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287 #ifdef COMPILER2 |
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288 } |
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289 if (EliminateLocks) { |
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290 #endif // COMPILER2 |
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291 #ifndef PRODUCT |
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292 bool first = true; |
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293 #endif |
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294 for (int i = 0; i < chunk->length(); i++) { |
83
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295 compiledVFrame* cvf = chunk->at(i); |
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296 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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297 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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298 if (monitors->is_nonempty()) { |
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299 relock_objects(monitors, thread); |
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300 #ifndef PRODUCT |
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301 if (PrintDeoptimizationDetails) { |
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302 ttyLocker ttyl; |
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303 for (int j = 0; j < monitors->length(); j++) { |
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304 MonitorInfo* mi = monitors->at(j); |
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305 if (mi->eliminated()) { |
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306 if (first) { |
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307 first = false; |
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308 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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309 } |
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310 tty->print_cr(" object <" INTPTR_FORMAT "> locked", mi->owner()); |
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311 } |
0 | 312 } |
313 } | |
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314 #endif // !PRODUCT |
0 | 315 } |
316 } | |
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317 #ifdef COMPILER2 |
0 | 318 } |
319 } | |
320 #endif // COMPILER2 | |
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321 #endif // COMPILER2 || GRAAL |
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322 |
0 | 323 // Ensure that no safepoint is taken after pointers have been stored |
324 // in fields of rematerialized objects. If a safepoint occurs from here on | |
325 // out the java state residing in the vframeArray will be missed. | |
326 No_Safepoint_Verifier no_safepoint; | |
327 | |
328 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk); | |
329 | |
330 assert(thread->vframe_array_head() == NULL, "Pending deopt!");; | |
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 |
374 assert(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub(), "just checking"); | |
375 #endif | |
1692 | 376 #else |
377 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
378 #endif // !SHARK | |
379 | |
0 | 380 // This is a guarantee instead of an assert because if vframe doesn't match |
381 // we will unpack the wrong deoptimized frame and wind up in strange places | |
382 // where it will be very difficult to figure out what went wrong. Better | |
383 // to die an early death here than some very obscure death later when the | |
384 // trail is cold. | |
385 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
386 // in that it will fail to detect a problem when there is one. This needs | |
387 // more work in tiger timeframe. | |
388 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
389 | |
390 int number_of_frames = array->frames(); | |
391 | |
392 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
393 // virtual activation, which is the reverse of the elements in the vframes array. | |
6197 | 394 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
0 | 395 // +1 because we always have an interpreter return address for the final slot. |
6197 | 396 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
0 | 397 int popframe_extra_args = 0; |
398 // Create an interpreter return address for the stub to use as its return | |
399 // address so the skeletal frames are perfectly walkable | |
400 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
401 | |
402 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
403 // activation be put back on the expression stack of the caller for reexecution | |
404 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
405 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
406 } | |
407 | |
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408 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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409 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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410 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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411 // |
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412 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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413 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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414 |
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415 // It's possible that the number of paramters at the call site is |
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416 // different than number of arguments in the callee when method |
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417 // handles are used. If the caller is interpreted get the real |
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418 // value so that the proper amount of space can be added to it's |
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419 // frame. |
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420 bool caller_was_method_handle = false; |
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421 if (deopt_sender.is_interpreted_frame()) { |
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422 methodHandle method = deopt_sender.interpreter_frame_method(); |
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423 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
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424 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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425 // Method handle invokes may involve fairly arbitrary chains of |
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426 // calls so it's impossible to know how much actual space the |
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427 // caller has for locals. |
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428 caller_was_method_handle = true; |
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429 } |
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430 } |
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431 |
0 | 432 // |
433 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
434 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
435 // frame_sizes/frame_pcs[n] youngest frame (int) | |
436 // | |
437 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
438 // owns the space for the return address to it's caller). Confusing ain't it. | |
439 // | |
440 // The vframe array can address vframes with indices running from | |
441 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
442 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
443 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
444 // so things look a little strange in this loop. | |
445 // | |
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446 int callee_parameters = 0; |
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447 int callee_locals = 0; |
0 | 448 for (int index = 0; index < array->frames(); index++ ) { |
449 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
450 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
451 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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452 int caller_parms = callee_parameters; |
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453 if ((index == array->frames() - 1) && caller_was_method_handle) { |
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454 caller_parms = 0; |
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455 } |
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456 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(caller_parms, |
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457 callee_parameters, |
0 | 458 callee_locals, |
459 index == 0, | |
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460 index == array->frames() - 1, |
0 | 461 popframe_extra_args); |
462 // This pc doesn't have to be perfect just good enough to identify the frame | |
463 // as interpreted so the skeleton frame will be walkable | |
464 // The correct pc will be set when the skeleton frame is completely filled out | |
465 // The final pc we store in the loop is wrong and will be overwritten below | |
466 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
467 | |
468 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
469 callee_locals = array->element(index)->method()->max_locals(); | |
470 popframe_extra_args = 0; | |
471 } | |
472 | |
473 // Compute whether the root vframe returns a float or double value. | |
474 BasicType return_type; | |
475 { | |
476 HandleMark hm; | |
477 methodHandle method(thread, array->element(0)->method()); | |
2142 | 478 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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479 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
0 | 480 } |
481 | |
482 // Compute information for handling adapters and adjusting the frame size of the caller. | |
483 int caller_adjustment = 0; | |
484 | |
485 // Compute the amount the oldest interpreter frame will have to adjust | |
486 // its caller's stack by. If the caller is a compiled frame then | |
487 // we pretend that the callee has no parameters so that the | |
488 // extension counts for the full amount of locals and not just | |
489 // locals-parms. This is because without a c2i adapter the parm | |
490 // area as created by the compiled frame will not be usable by | |
491 // the interpreter. (Depending on the calling convention there | |
492 // may not even be enough space). | |
493 | |
494 // QQQ I'd rather see this pushed down into last_frame_adjust | |
495 // and have it take the sender (aka caller). | |
496 | |
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497 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
0 | 498 caller_adjustment = last_frame_adjust(0, callee_locals); |
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499 } else if (callee_locals > callee_parameters) { |
0 | 500 // The caller frame may need extending to accommodate |
501 // non-parameter locals of the first unpacked interpreted frame. | |
502 // Compute that adjustment. | |
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503 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
0 | 504 } |
505 | |
506 // If the sender is deoptimized the we must retrieve the address of the handler | |
507 // since the frame will "magically" show the original pc before the deopt | |
508 // and we'd undo the deopt. | |
509 | |
510 frame_pcs[0] = deopt_sender.raw_pc(); | |
511 | |
1692 | 512 #ifndef SHARK |
0 | 513 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
1692 | 514 #endif // SHARK |
0 | 515 |
516 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, | |
517 caller_adjustment * BytesPerWord, | |
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518 caller_was_method_handle ? 0 : callee_parameters, |
0 | 519 number_of_frames, |
520 frame_sizes, | |
521 frame_pcs, | |
522 return_type); | |
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523 // On some platforms, we need a way to pass some platform dependent |
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524 // information to the unpacking code so the skeletal frames come out |
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525 // correct (initial fp value, unextended sp, ...) |
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526 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
0 | 527 |
528 if (array->frames() > 1) { | |
529 if (VerifyStack && TraceDeoptimization) { | |
6843 | 530 ttyLocker ttyl; |
0 | 531 tty->print_cr("Deoptimizing method containing inlining"); |
532 } | |
533 } | |
534 | |
535 array->set_unroll_block(info); | |
536 return info; | |
537 } | |
538 | |
539 // Called to cleanup deoptimization data structures in normal case | |
540 // after unpacking to stack and when stack overflow error occurs | |
541 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
542 vframeArray *array) { | |
543 | |
544 // Get array if coming from exception | |
545 if (array == NULL) { | |
546 array = thread->vframe_array_head(); | |
547 } | |
548 thread->set_vframe_array_head(NULL); | |
549 | |
550 // Free the previous UnrollBlock | |
551 vframeArray* old_array = thread->vframe_array_last(); | |
552 thread->set_vframe_array_last(array); | |
553 | |
554 if (old_array != NULL) { | |
555 UnrollBlock* old_info = old_array->unroll_block(); | |
556 old_array->set_unroll_block(NULL); | |
557 delete old_info; | |
558 delete old_array; | |
559 } | |
560 | |
561 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
562 // inside the vframeArray (StackValueCollections) | |
563 | |
564 delete thread->deopt_mark(); | |
565 thread->set_deopt_mark(NULL); | |
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566 thread->set_deopt_nmethod(NULL); |
0 | 567 |
568 | |
569 if (JvmtiExport::can_pop_frame()) { | |
570 #ifndef CC_INTERP | |
571 // Regardless of whether we entered this routine with the pending | |
572 // popframe condition bit set, we should always clear it now | |
573 thread->clear_popframe_condition(); | |
574 #else | |
575 // C++ interpeter will clear has_pending_popframe when it enters | |
576 // with method_resume. For deopt_resume2 we clear it now. | |
577 if (thread->popframe_forcing_deopt_reexecution()) | |
578 thread->clear_popframe_condition(); | |
579 #endif /* CC_INTERP */ | |
580 } | |
581 | |
582 // unpack_frames() is called at the end of the deoptimization handler | |
583 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
584 // so that an asynchronous stack walker can work again. This counter is | |
585 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
586 // the beginning of uncommon_trap(). | |
587 thread->dec_in_deopt_handler(); | |
588 } | |
589 | |
590 | |
591 // Return BasicType of value being returned | |
592 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
593 | |
594 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
595 // allocate will be freed at the end of the routine. | |
596 | |
597 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
598 // but makes the entry a little slower. There is however a little dance we have to | |
599 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
600 ResetNoHandleMark rnhm; // No-op in release/product versions | |
601 HandleMark hm; | |
602 | |
603 frame stub_frame = thread->last_frame(); | |
604 | |
605 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
606 // must point to the vframeArray for the unpack frame. | |
607 vframeArray* array = thread->vframe_array_head(); | |
608 | |
609 #ifndef PRODUCT | |
610 if (TraceDeoptimization) { | |
6843 | 611 ttyLocker ttyl; |
0 | 612 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
613 } | |
614 #endif | |
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615 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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616 stub_frame.pc(), stub_frame.sp(), exec_mode); |
0 | 617 |
618 UnrollBlock* info = array->unroll_block(); | |
619 | |
620 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
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621 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
0 | 622 |
623 BasicType bt = info->return_type(); | |
624 | |
625 // If we have an exception pending, claim that the return type is an oop | |
626 // so the deopt_blob does not overwrite the exception_oop. | |
627 | |
628 if (exec_mode == Unpack_exception) | |
629 bt = T_OBJECT; | |
630 | |
631 // Cleanup thread deopt data | |
632 cleanup_deopt_info(thread, array); | |
633 | |
634 #ifndef PRODUCT | |
635 if (VerifyStack) { | |
636 ResourceMark res_mark; | |
637 | |
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638 thread->validate_frame_layout(); |
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639 |
0 | 640 // Verify that the just-unpacked frames match the interpreter's |
641 // notions of expression stack and locals | |
642 vframeArray* cur_array = thread->vframe_array_last(); | |
643 RegisterMap rm(thread, false); | |
644 rm.set_include_argument_oops(false); | |
645 bool is_top_frame = true; | |
646 int callee_size_of_parameters = 0; | |
647 int callee_max_locals = 0; | |
648 for (int i = 0; i < cur_array->frames(); i++) { | |
649 vframeArrayElement* el = cur_array->element(i); | |
650 frame* iframe = el->iframe(); | |
651 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
652 | |
653 // Get the oop map for this bci | |
654 InterpreterOopMap mask; | |
655 int cur_invoke_parameter_size = 0; | |
656 bool try_next_mask = false; | |
657 int next_mask_expression_stack_size = -1; | |
658 int top_frame_expression_stack_adjustment = 0; | |
659 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
660 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
661 BytecodeStream str(mh); | |
662 str.set_start(iframe->interpreter_frame_bci()); | |
663 int max_bci = mh->code_size(); | |
664 // Get to the next bytecode if possible | |
665 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
666 // Check to see if we can grab the number of outgoing arguments | |
667 // at an uncommon trap for an invoke (where the compiler | |
668 // generates debug info before the invoke has executed) | |
669 Bytecodes::Code cur_code = str.next(); | |
670 if (cur_code == Bytecodes::_invokevirtual || | |
671 cur_code == Bytecodes::_invokespecial || | |
672 cur_code == Bytecodes::_invokestatic || | |
673 cur_code == Bytecodes::_invokeinterface) { | |
2142 | 674 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
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675 Symbol* signature = invoke.signature(); |
0 | 676 ArgumentSizeComputer asc(signature); |
677 cur_invoke_parameter_size = asc.size(); | |
678 if (cur_code != Bytecodes::_invokestatic) { | |
679 // Add in receiver | |
680 ++cur_invoke_parameter_size; | |
681 } | |
682 } | |
683 if (str.bci() < max_bci) { | |
684 Bytecodes::Code bc = str.next(); | |
685 if (bc >= 0) { | |
686 // The interpreter oop map generator reports results before | |
687 // the current bytecode has executed except in the case of | |
688 // calls. It seems to be hard to tell whether the compiler | |
689 // has emitted debug information matching the "state before" | |
690 // a given bytecode or the state after, so we try both | |
691 switch (cur_code) { | |
692 case Bytecodes::_invokevirtual: | |
693 case Bytecodes::_invokespecial: | |
694 case Bytecodes::_invokestatic: | |
695 case Bytecodes::_invokeinterface: | |
696 case Bytecodes::_athrow: | |
697 break; | |
698 default: { | |
699 InterpreterOopMap next_mask; | |
700 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
701 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
702 // Need to subtract off the size of the result type of | |
703 // the bytecode because this is not described in the | |
704 // debug info but returned to the interpreter in the TOS | |
705 // caching register | |
706 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
707 if (bytecode_result_type != T_ILLEGAL) { | |
708 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
709 } | |
710 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
711 try_next_mask = true; | |
712 break; | |
713 } | |
714 } | |
715 } | |
716 } | |
717 | |
718 // Verify stack depth and oops in frame | |
719 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
720 if (!( | |
721 /* SPARC */ | |
722 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
723 /* x86 */ | |
724 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
725 (try_next_mask && | |
726 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
727 top_frame_expression_stack_adjustment))) || | |
728 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
729 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute) && | |
730 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) | |
731 )) { | |
732 ttyLocker ttyl; | |
733 | |
734 // Print out some information that will help us debug the problem | |
735 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
736 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
737 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
738 iframe->interpreter_frame_expression_stack_size()); | |
739 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
740 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
741 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
742 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
743 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
744 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
745 tty->print_cr(" exec_mode = %d", exec_mode); | |
746 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
747 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
748 tty->print_cr(" Interpreted frames:"); | |
749 for (int k = 0; k < cur_array->frames(); k++) { | |
750 vframeArrayElement* el = cur_array->element(k); | |
751 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
752 } | |
753 cur_array->print_on_2(tty); | |
754 guarantee(false, "wrong number of expression stack elements during deopt"); | |
755 } | |
756 VerifyOopClosure verify; | |
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757 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
0 | 758 callee_size_of_parameters = mh->size_of_parameters(); |
759 callee_max_locals = mh->max_locals(); | |
760 is_top_frame = false; | |
761 } | |
762 } | |
763 #endif /* !PRODUCT */ | |
764 | |
765 | |
766 return bt; | |
767 JRT_END | |
768 | |
769 | |
770 int Deoptimization::deoptimize_dependents() { | |
771 Threads::deoptimized_wrt_marked_nmethods(); | |
772 return 0; | |
773 } | |
774 | |
775 | |
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776 #if defined(COMPILER2) || defined(GRAAL) |
0 | 777 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
778 Handle pending_exception(thread->pending_exception()); | |
779 const char* exception_file = thread->exception_file(); | |
780 int exception_line = thread->exception_line(); | |
781 thread->clear_pending_exception(); | |
782 | |
783 for (int i = 0; i < objects->length(); i++) { | |
784 assert(objects->at(i)->is_object(), "invalid debug information"); | |
785 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
786 | |
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787 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 788 oop obj = NULL; |
789 | |
790 if (k->oop_is_instance()) { | |
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791 InstanceKlass* ik = InstanceKlass::cast(k()); |
0 | 792 obj = ik->allocate_instance(CHECK_(false)); |
793 } else if (k->oop_is_typeArray()) { | |
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794 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 795 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
796 int len = sv->field_size() / type2size[ak->element_type()]; | |
797 obj = ak->allocate(len, CHECK_(false)); | |
798 } else if (k->oop_is_objArray()) { | |
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799 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
0 | 800 obj = ak->allocate(sv->field_size(), CHECK_(false)); |
801 } | |
802 | |
803 assert(obj != NULL, "allocation failed"); | |
804 assert(sv->value().is_null(), "redundant reallocation"); | |
805 sv->set_value(obj); | |
806 } | |
807 | |
808 if (pending_exception.not_null()) { | |
809 thread->set_pending_exception(pending_exception(), exception_file, exception_line); | |
810 } | |
811 | |
812 return true; | |
813 } | |
814 | |
815 // restore elements of an eliminated type array | |
816 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
817 int index = 0; | |
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818 intptr_t val; |
0 | 819 |
820 for (int i = 0; i < sv->field_size(); i++) { | |
821 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
822 switch(type) { | |
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823 case T_LONG: case T_DOUBLE: { |
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824 assert(value->type() == T_INT, "Agreement."); |
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825 StackValue* low = |
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826 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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827 #ifdef _LP64 |
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828 jlong res = (jlong)low->get_int(); |
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829 #else |
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830 #ifdef SPARC |
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831 // For SPARC we have to swap high and low words. |
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832 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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833 #else |
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834 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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835 #endif //SPARC |
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836 #endif |
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837 obj->long_at_put(index, res); |
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838 break; |
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839 } |
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840 |
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841 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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|
842 case T_INT: case T_FLOAT: // 4 bytes. |
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|
843 assert(value->type() == T_INT, "Agreement."); |
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diff
changeset
|
844 val = value->get_int(); |
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0
diff
changeset
|
845 obj->int_at_put(index, (jint)*((jint*)&val)); |
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|
846 break; |
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kvn
parents:
0
diff
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|
847 |
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kvn
parents:
0
diff
changeset
|
848 case T_SHORT: case T_CHAR: // 2 bytes |
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0
diff
changeset
|
849 assert(value->type() == T_INT, "Agreement."); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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|
850 val = value->get_int(); |
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kvn
parents:
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diff
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|
851 obj->short_at_put(index, (jshort)*((jint*)&val)); |
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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0
diff
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|
852 break; |
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6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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0
diff
changeset
|
853 |
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6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
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diff
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|
854 case T_BOOLEAN: case T_BYTE: // 1 byte |
52fed2ec0afb
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diff
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|
855 assert(value->type() == T_INT, "Agreement."); |
52fed2ec0afb
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diff
changeset
|
856 val = value->get_int(); |
52fed2ec0afb
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diff
changeset
|
857 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
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kvn
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0
diff
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|
858 break; |
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diff
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|
859 |
0 | 860 default: |
861 ShouldNotReachHere(); | |
862 } | |
863 index++; | |
864 } | |
865 } | |
866 | |
867 // restore fields of an eliminated object array | |
868 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
869 for (int i = 0; i < sv->field_size(); i++) { | |
870 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
871 assert(value->type() == T_OBJECT, "object element expected"); | |
872 obj->obj_at_put(i, value->get_obj()()); | |
873 } | |
874 } | |
875 | |
7222 | 876 class ReassignedField { |
877 public: | |
878 int _offset; | |
879 BasicType _type; | |
880 public: | |
881 ReassignedField() { | |
882 _offset = 0; | |
883 _type = T_ILLEGAL; | |
884 } | |
885 }; | |
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Lukas Stadler <lukas.stadler@jku.at>
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|
886 |
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Lukas Stadler <lukas.stadler@jku.at>
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diff
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|
887 int compare(ReassignedField* left, ReassignedField* right) { |
7222 | 888 return left->_offset - right->_offset; |
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Lukas Stadler <lukas.stadler@jku.at>
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diff
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|
889 } |
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Lukas Stadler <lukas.stadler@jku.at>
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|
890 |
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Doug Simon <doug.simon@oracle.com>
diff
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|
891 // Restore fields of an eliminated instance object using the same field order |
7084
9ba90252ce08
HotSpotResolvedJavaType is now the HotSpot implementation of ResolvedJavaType,
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
6948
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|
892 // returned by HotSpotResolvedObjectType.getInstanceFields(true) |
6948
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Doug Simon <doug.simon@oracle.com>
diff
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|
893 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj) { |
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Doug Simon <doug.simon@oracle.com>
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|
894 if (klass->superklass() != NULL) { |
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Doug Simon <doug.simon@oracle.com>
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|
895 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj); |
e522a00b91aa
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diff
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|
896 } |
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Doug Simon <doug.simon@oracle.com>
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|
897 |
7137
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unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
parents:
7084
diff
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|
898 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
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e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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|
899 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
7137
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
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diff
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|
900 if (!fs.access_flags().is_static()) { |
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
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diff
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|
901 ReassignedField field; |
7222 | 902 field._offset = fs.offset(); |
903 field._type = FieldType::basic_type(fs.signature()); | |
7137
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
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7084
diff
changeset
|
904 fields->append(field); |
6948
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
diff
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|
905 } |
7137
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diff
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|
906 } |
a818db37b7be
unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
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|
907 fields->sort(compare); |
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parents:
7084
diff
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|
908 for (int i = 0; i < fields->length(); i++) { |
6948
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Doug Simon <doug.simon@oracle.com>
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|
909 intptr_t val; |
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Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
910 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(svIndex)); |
7222 | 911 int offset = fields->at(i)._offset; |
912 BasicType type = fields->at(i)._type; | |
6948
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Doug Simon <doug.simon@oracle.com>
diff
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|
913 switch (type) { |
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Doug Simon <doug.simon@oracle.com>
diff
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|
914 case T_OBJECT: case T_ARRAY: |
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Doug Simon <doug.simon@oracle.com>
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|
915 assert(value->type() == T_OBJECT, "Agreement."); |
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Doug Simon <doug.simon@oracle.com>
diff
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|
916 obj->obj_field_put(offset, value->get_obj()()); |
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Doug Simon <doug.simon@oracle.com>
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|
917 break; |
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Doug Simon <doug.simon@oracle.com>
diff
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|
918 |
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
diff
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|
919 case T_LONG: case T_DOUBLE: { |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
920 assert(value->type() == T_INT, "Agreement."); |
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
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|
921 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
922 #ifdef _LP64 |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
923 jlong res = (jlong)low->get_int(); |
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Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
924 #else |
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
diff
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|
925 #ifdef SPARC |
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
926 // For SPARC we have to swap high and low words. |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
927 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
928 #else |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
929 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
930 #endif //SPARC |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
931 #endif |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
932 obj->long_field_put(offset, res); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
933 break; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
934 } |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
935 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
936 case T_INT: case T_FLOAT: // 4 bytes. |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
937 assert(value->type() == T_INT, "Agreement."); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
938 val = value->get_int(); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
939 obj->int_field_put(offset, (jint)*((jint*)&val)); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
940 break; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
941 |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
942 case T_SHORT: case T_CHAR: // 2 bytes |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
943 assert(value->type() == T_INT, "Agreement."); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
944 val = value->get_int(); |
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
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|
945 obj->short_field_put(offset, (jshort)*((jint*)&val)); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
946 break; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
947 |
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
diff
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|
948 case T_BOOLEAN: case T_BYTE: // 1 byte |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
949 assert(value->type() == T_INT, "Agreement."); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
950 val = value->get_int(); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
951 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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|
952 break; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
953 |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
954 default: |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
955 ShouldNotReachHere(); |
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
956 } |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
957 svIndex++; |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
958 } |
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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changeset
|
959 return svIndex; |
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Doug Simon <doug.simon@oracle.com>
diff
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|
960 } |
0 | 961 |
962 // restore fields of all eliminated objects and arrays | |
963 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects) { | |
964 for (int i = 0; i < objects->length(); i++) { | |
965 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
966 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 967 Handle obj = sv->value(); |
968 assert(obj.not_null(), "reallocation was missed"); | |
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
969 if (PrintDeoptimizationDetails) { |
3134
4b63eb1197ca
Various fixes around escape analysis.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3090
diff
changeset
|
970 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
4b63eb1197ca
Various fixes around escape analysis.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3090
diff
changeset
|
971 } |
0 | 972 |
973 if (k->oop_is_instance()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
974 InstanceKlass* ik = InstanceKlass::cast(k()); |
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
|
975 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj()); |
0 | 976 } else if (k->oop_is_typeArray()) { |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents:
6725
diff
changeset
|
977 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 978 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
979 } else if (k->oop_is_objArray()) { | |
980 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
981 } | |
982 } | |
983 } | |
984 | |
985 | |
986 // relock objects for which synchronization was eliminated | |
83
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987 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread) { |
0 | 988 for (int i = 0; i < monitors->length(); i++) { |
83
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989 MonitorInfo* mon_info = monitors->at(i); |
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990 if (mon_info->eliminated()) { |
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991 assert(mon_info->owner() != NULL, "reallocation was missed"); |
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992 Handle obj = Handle(mon_info->owner()); |
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993 markOop mark = obj->mark(); |
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994 if (UseBiasedLocking && mark->has_bias_pattern()) { |
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995 // New allocated objects may have the mark set to anonymously biased. |
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996 // Also the deoptimized method may called methods with synchronization |
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997 // where the thread-local object is bias locked to the current thread. |
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998 assert(mark->is_biased_anonymously() || |
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999 mark->biased_locker() == thread, "should be locked to current thread"); |
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1000 // Reset mark word to unbiased prototype. |
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1001 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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1002 obj->set_mark(unbiased_prototype); |
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1003 } |
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1004 BasicLock* lock = mon_info->lock(); |
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1005 ObjectSynchronizer::slow_enter(obj, lock, thread); |
0 | 1006 } |
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1007 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
0 | 1008 } |
1009 } | |
1010 | |
1011 | |
1012 #ifndef PRODUCT | |
1013 // print information about reallocated objects | |
1014 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects) { | |
1015 fieldDescriptor fd; | |
1016 | |
1017 for (int i = 0; i < objects->length(); i++) { | |
1018 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1019 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 1020 Handle obj = sv->value(); |
1021 | |
1022 tty->print(" object <" INTPTR_FORMAT "> of type ", sv->value()()); | |
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1023 k->print_value(); |
0 | 1024 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
1025 tty->cr(); | |
1026 | |
1027 if (Verbose) { | |
1028 k->oop_print_on(obj(), tty); | |
1029 } | |
1030 } | |
1031 } | |
1032 #endif | |
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1033 #endif // COMPILER2 || GRAAL |
0 | 1034 |
1035 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk) { | |
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1036 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
0 | 1037 |
1038 #ifndef PRODUCT | |
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1039 if (PrintDeoptimizationDetails) { |
0 | 1040 ttyLocker ttyl; |
1041 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
1042 fr.print_on(tty); | |
1043 tty->print_cr(" Virtual frames (innermost first):"); | |
1044 for (int index = 0; index < chunk->length(); index++) { | |
1045 compiledVFrame* vf = chunk->at(index); | |
1046 tty->print(" %2d - ", index); | |
1047 vf->print_value(); | |
1048 int bci = chunk->at(index)->raw_bci(); | |
1049 const char* code_name; | |
1050 if (bci == SynchronizationEntryBCI) { | |
1051 code_name = "sync entry"; | |
1052 } else { | |
2142 | 1053 Bytecodes::Code code = vf->method()->code_at(bci); |
0 | 1054 code_name = Bytecodes::name(code); |
1055 } | |
1056 tty->print(" - %s", code_name); | |
1057 tty->print_cr(" @ bci %d ", bci); | |
1058 if (Verbose) { | |
1059 vf->print(); | |
1060 tty->cr(); | |
1061 } | |
1062 } | |
1063 } | |
1064 #endif | |
1065 | |
1066 // Register map for next frame (used for stack crawl). We capture | |
1067 // the state of the deopt'ing frame's caller. Thus if we need to | |
1068 // stuff a C2I adapter we can properly fill in the callee-save | |
1069 // register locations. | |
1070 frame caller = fr.sender(reg_map); | |
1071 int frame_size = caller.sp() - fr.sp(); | |
1072 | |
1073 frame sender = caller; | |
1074 | |
1075 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
1076 // the vframeArray containing the unpacking information is allocated in the C heap. | |
1077 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
1078 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr); | |
1079 | |
1080 // Compare the vframeArray to the collected vframes | |
1081 assert(array->structural_compare(thread, chunk), "just checking"); | |
1082 | |
1083 #ifndef PRODUCT | |
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1084 if (PrintDeoptimizationDetails) { |
0 | 1085 ttyLocker ttyl; |
1086 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
1087 } | |
1088 #endif // PRODUCT | |
1089 | |
1090 return array; | |
1091 } | |
1092 | |
1093 | |
1094 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
1095 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
1096 for (int i = 0; i < monitors->length(); i++) { | |
1097 MonitorInfo* mon_info = monitors->at(i); | |
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1098 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
0 | 1099 objects_to_revoke->append(Handle(mon_info->owner())); |
1100 } | |
1101 } | |
1102 } | |
1103 | |
1104 | |
1105 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
1106 if (!UseBiasedLocking) { | |
1107 return; | |
1108 } | |
1109 | |
1110 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1111 | |
1112 // Unfortunately we don't have a RegisterMap available in most of | |
1113 // the places we want to call this routine so we need to walk the | |
1114 // stack again to update the register map. | |
1115 if (map == NULL || !map->update_map()) { | |
1116 StackFrameStream sfs(thread, true); | |
1117 bool found = false; | |
1118 while (!found && !sfs.is_done()) { | |
1119 frame* cur = sfs.current(); | |
1120 sfs.next(); | |
1121 found = cur->id() == fr.id(); | |
1122 } | |
1123 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
1124 map = sfs.register_map(); | |
1125 } | |
1126 | |
1127 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
1128 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1129 // Revoke monitors' biases in all scopes | |
1130 while (!cvf->is_top()) { | |
1131 collect_monitors(cvf, objects_to_revoke); | |
1132 cvf = compiledVFrame::cast(cvf->sender()); | |
1133 } | |
1134 collect_monitors(cvf, objects_to_revoke); | |
1135 | |
1136 if (SafepointSynchronize::is_at_safepoint()) { | |
1137 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1138 } else { | |
1139 BiasedLocking::revoke(objects_to_revoke); | |
1140 } | |
1141 } | |
1142 | |
1143 | |
1144 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
1145 if (!UseBiasedLocking) { | |
1146 return; | |
1147 } | |
1148 | |
1149 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
1150 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1151 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
1152 if (jt->has_last_Java_frame()) { | |
1153 StackFrameStream sfs(jt, true); | |
1154 while (!sfs.is_done()) { | |
1155 frame* cur = sfs.current(); | |
1156 if (cb->contains(cur->pc())) { | |
1157 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
1158 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1159 // Revoke monitors' biases in all scopes | |
1160 while (!cvf->is_top()) { | |
1161 collect_monitors(cvf, objects_to_revoke); | |
1162 cvf = compiledVFrame::cast(cvf->sender()); | |
1163 } | |
1164 collect_monitors(cvf, objects_to_revoke); | |
1165 } | |
1166 sfs.next(); | |
1167 } | |
1168 } | |
1169 } | |
1170 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1171 } | |
1172 | |
1173 | |
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1174 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
0 | 1175 assert(fr.can_be_deoptimized(), "checking frame type"); |
1176 | |
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1177 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
0 | 1178 |
1179 // Patch the nmethod so that when execution returns to it we will | |
1180 // deopt the execution state and return to the interpreter. | |
1181 fr.deoptimize(thread); | |
1182 } | |
1183 | |
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1184 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
0 | 1185 // Deoptimize only if the frame comes from compile code. |
1186 // Do not deoptimize the frame which is already patched | |
1187 // during the execution of the loops below. | |
1188 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
1189 return; | |
1190 } | |
1191 ResourceMark rm; | |
1192 DeoptimizationMarker dm; | |
1193 if (UseBiasedLocking) { | |
1194 revoke_biases_of_monitors(thread, fr, map); | |
1195 } | |
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1196 deoptimize_single_frame(thread, fr, reason); |
0 | 1197 |
1198 } | |
1199 | |
1200 | |
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1201 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1202 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
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1203 "can only deoptimize other thread at a safepoint"); |
0 | 1204 // Compute frame and register map based on thread and sp. |
1205 RegisterMap reg_map(thread, UseBiasedLocking); | |
1206 frame fr = thread->last_frame(); | |
1207 while (fr.id() != id) { | |
1208 fr = fr.sender(®_map); | |
1209 } | |
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1210 deoptimize(thread, fr, ®_map, reason); |
0 | 1211 } |
1212 | |
1213 | |
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1214 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1215 if (thread == Thread::current()) { |
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1216 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
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1217 } else { |
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1218 VM_DeoptimizeFrame deopt(thread, id, reason); |
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1219 VMThread::execute(&deopt); |
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1220 } |
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1221 } |
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1222 |
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1223 |
0 | 1224 // JVMTI PopFrame support |
1225 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
1226 { | |
1227 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
1228 } | |
1229 JRT_END | |
1230 | |
1231 | |
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1232 #if defined(COMPILER2) || defined(SHARK) || defined(GRAAL) |
0 | 1233 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
1234 // in case of an unresolved klass entry, load the class. | |
1235 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
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1236 Klass* tk = constant_pool->klass_at(index, CHECK); |
0 | 1237 return; |
1238 } | |
1239 | |
1240 if (!constant_pool->tag_at(index).is_symbol()) return; | |
1241 | |
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1242 Handle class_loader (THREAD, constant_pool->pool_holder()->class_loader()); |
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1243 Symbol* symbol = constant_pool->symbol_at(index); |
0 | 1244 |
1245 // class name? | |
1246 if (symbol->byte_at(0) != '(') { | |
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1247 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1248 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
1249 return; | |
1250 } | |
1251 | |
1252 // then it must be a signature! | |
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1253 ResourceMark rm(THREAD); |
0 | 1254 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
1255 if (ss.is_object()) { | |
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1256 Symbol* class_name = ss.as_symbol(CHECK); |
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1257 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1258 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
1259 } | |
1260 } | |
1261 } | |
1262 | |
1263 | |
1264 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
1265 EXCEPTION_MARK; | |
1266 load_class_by_index(constant_pool, index, THREAD); | |
1267 if (HAS_PENDING_EXCEPTION) { | |
1268 // Exception happened during classloading. We ignore the exception here, since it | |
1269 // is going to be rethrown since the current activation is going to be deoptimzied and | |
1270 // the interpreter will re-execute the bytecode. | |
1271 CLEAR_PENDING_EXCEPTION; | |
1272 } | |
1273 } | |
1274 | |
1275 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
1276 HandleMark hm; | |
1277 | |
1278 // uncommon_trap() is called at the beginning of the uncommon trap | |
1279 // handler. Note this fact before we start generating temporary frames | |
1280 // that can confuse an asynchronous stack walker. This counter is | |
1281 // decremented at the end of unpack_frames(). | |
1282 thread->inc_in_deopt_handler(); | |
1283 | |
1284 // We need to update the map if we have biased locking. | |
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1285 #ifdef GRAAL |
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1286 // (lstadler) Graal might need to get an exception from the stack, which in turn requires the register map to be valid |
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1287 RegisterMap reg_map(thread, true); |
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1288 #else |
0 | 1289 RegisterMap reg_map(thread, UseBiasedLocking); |
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6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
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1290 #endif |
0 | 1291 frame stub_frame = thread->last_frame(); |
1292 frame fr = stub_frame.sender(®_map); | |
1293 // Make sure the calling nmethod is not getting deoptimized and removed | |
1294 // before we are done with it. | |
1295 nmethodLocker nl(fr.pc()); | |
1296 | |
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never
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1297 // Log a message |
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1298 Events::log(thread, "Uncommon trap: trap_request=" PTR32_FORMAT " fr.pc=" INTPTR_FORMAT, |
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1299 trap_request, fr.pc()); |
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1300 |
0 | 1301 { |
1302 ResourceMark rm; | |
1303 | |
1304 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
1305 revoke_biases_of_monitors(thread, fr, ®_map); | |
1306 | |
1307 DeoptReason reason = trap_request_reason(trap_request); | |
1308 DeoptAction action = trap_request_action(trap_request); | |
1309 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 | |
1310 | |
1311 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
1312 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1313 | |
1314 nmethod* nm = cvf->code(); | |
1315 | |
1316 ScopeDesc* trap_scope = cvf->scope(); | |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
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|
1317 |
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
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|
1318 if (TraceDeoptimization) { |
4674
e1c053324210
changed TraceDeoptimization output
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4668
diff
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|
1319 tty->print_cr(" bci=%d pc=%d, relative_pc=%d, method=%s", trap_scope->bci(), fr.pc(), fr.pc() - nm->code_begin(), trap_scope->method()->name()->as_C_string()); |
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
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|
1320 } |
0 | 1321 |
1322 methodHandle trap_method = trap_scope->method(); | |
1323 int trap_bci = trap_scope->bci(); | |
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
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|
1324 if (trap_bci == SynchronizationEntryBCI) { |
6b6cbd8b8914
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
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|
1325 trap_bci = 0; |
6b6cbd8b8914
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1326 Thread::current()->set_pending_monitorenter(true); |
6b6cbd8b8914
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
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|
1327 } |
2142 | 1328 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
0 | 1329 |
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
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|
1330 if (trap_scope->rethrow_exception()) { |
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
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|
1331 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
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|
1332 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
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|
1333 } |
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
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|
1334 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
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|
1335 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
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|
1336 ScopeValue* topOfStack = expressions->top(); |
8151
b8f261ba79c6
Minimize diff to plain HotSpot version.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8124
diff
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|
1337 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
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changeset
|
1338 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
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|
1339 } |
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
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|
1340 |
0 | 1341 // Record this event in the histogram. |
1342 gather_statistics(reason, action, trap_bc); | |
1343 | |
1344 // Ensure that we can record deopt. history: | |
1345 bool create_if_missing = ProfileTraps; | |
1346 | |
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1347 MethodData* trap_mdo = |
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|
1348 get_method_data(thread, trap_method, create_if_missing); |
0 | 1349 |
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1350 // Log a message |
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|
1351 Events::log_deopt_message(thread, "Uncommon trap: reason=%s action=%s pc=" INTPTR_FORMAT " method=%s @ %d", |
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|
1352 trap_reason_name(reason), trap_action_name(action), fr.pc(), |
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|
1353 trap_method->name_and_sig_as_C_string(), trap_bci); |
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|
1354 |
0 | 1355 // Print a bunch of diagnostics, if requested. |
1356 if (TraceDeoptimization || LogCompilation) { | |
1357 ResourceMark rm; | |
1358 ttyLocker ttyl; | |
1359 char buf[100]; | |
1360 if (xtty != NULL) { | |
1361 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
1362 os::current_thread_id(), | |
1363 format_trap_request(buf, sizeof(buf), trap_request)); | |
1364 nm->log_identity(xtty); | |
1365 } | |
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|
1366 Symbol* class_name = NULL; |
0 | 1367 bool unresolved = false; |
1368 if (unloaded_class_index >= 0) { | |
1369 constantPoolHandle constants (THREAD, trap_method->constants()); | |
1370 if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) { | |
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1371 class_name = constants->klass_name_at(unloaded_class_index); |
0 | 1372 unresolved = true; |
1373 if (xtty != NULL) | |
1374 xtty->print(" unresolved='1'"); | |
1375 } else if (constants->tag_at(unloaded_class_index).is_symbol()) { | |
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1376 class_name = constants->symbol_at(unloaded_class_index); |
0 | 1377 } |
1378 if (xtty != NULL) | |
1379 xtty->name(class_name); | |
1380 } | |
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1381 if (xtty != NULL && trap_mdo != NULL) { |
0 | 1382 // Dump the relevant MDO state. |
1383 // This is the deopt count for the current reason, any previous | |
1384 // reasons or recompiles seen at this point. | |
1385 int dcnt = trap_mdo->trap_count(reason); | |
1386 if (dcnt != 0) | |
1387 xtty->print(" count='%d'", dcnt); | |
1388 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
1389 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
1390 if (dos != 0) { | |
1391 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
1392 if (trap_state_is_recompiled(dos)) { | |
1393 int recnt2 = trap_mdo->overflow_recompile_count(); | |
1394 if (recnt2 != 0) | |
1395 xtty->print(" recompiles2='%d'", recnt2); | |
1396 } | |
1397 } | |
1398 } | |
1399 if (xtty != NULL) { | |
1400 xtty->stamp(); | |
1401 xtty->end_head(); | |
1402 } | |
1403 if (TraceDeoptimization) { // make noise on the tty | |
1404 tty->print("Uncommon trap occurred in"); | |
1405 nm->method()->print_short_name(tty); | |
6843 | 1406 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d", |
0 | 1407 fr.pc(), |
6843 | 1408 os::current_thread_id(), |
0 | 1409 trap_reason_name(reason), |
1410 trap_action_name(action), | |
1411 unloaded_class_index); | |
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|
1412 if (class_name != NULL) { |
0 | 1413 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
1414 class_name->print_symbol_on(tty); | |
1415 } | |
1416 tty->cr(); | |
1417 } | |
1418 if (xtty != NULL) { | |
1419 // Log the precise location of the trap. | |
1420 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
1421 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
1422 xtty->method(sd->method()); | |
1423 xtty->end_elem(); | |
1424 if (sd->is_top()) break; | |
1425 } | |
1426 xtty->tail("uncommon_trap"); | |
1427 } | |
1428 } | |
1429 // (End diagnostic printout.) | |
1430 | |
1431 // Load class if necessary | |
1432 if (unloaded_class_index >= 0) { | |
1433 constantPoolHandle constants(THREAD, trap_method->constants()); | |
1434 load_class_by_index(constants, unloaded_class_index); | |
1435 } | |
1436 | |
1437 // Flush the nmethod if necessary and desirable. | |
1438 // | |
1439 // We need to avoid situations where we are re-flushing the nmethod | |
1440 // because of a hot deoptimization site. Repeated flushes at the same | |
1441 // point need to be detected by the compiler and avoided. If the compiler | |
1442 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
1443 // module must take measures to avoid an infinite cycle of recompilation | |
1444 // and deoptimization. There are several such measures: | |
1445 // | |
1446 // 1. If a recompilation is ordered a second time at some site X | |
1447 // and for the same reason R, the action is adjusted to 'reinterpret', | |
1448 // to give the interpreter time to exercise the method more thoroughly. | |
1449 // If this happens, the method's overflow_recompile_count is incremented. | |
1450 // | |
1451 // 2. If the compiler fails to reduce the deoptimization rate, then | |
1452 // the method's overflow_recompile_count will begin to exceed the set | |
1453 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
1454 // is adjusted to 'make_not_compilable', and the method is abandoned | |
1455 // to the interpreter. This is a performance hit for hot methods, | |
1456 // but is better than a disastrous infinite cycle of recompilations. | |
1457 // (Actually, only the method containing the site X is abandoned.) | |
1458 // | |
1459 // 3. In parallel with the previous measures, if the total number of | |
1460 // recompilations of a method exceeds the much larger set limit | |
1461 // PerMethodRecompilationCutoff, the method is abandoned. | |
1462 // This should only happen if the method is very large and has | |
1463 // many "lukewarm" deoptimizations. The code which enforces this | |
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1464 // limit is elsewhere (class nmethod, class Method). |
0 | 1465 // |
1466 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
1467 // to recompile at each bytecode independently of the per-BCI cutoff. | |
1468 // | |
1469 // The decision to update code is up to the compiler, and is encoded | |
1470 // in the Action_xxx code. If the compiler requests Action_none | |
1471 // no trap state is changed, no compiled code is changed, and the | |
1472 // computation suffers along in the interpreter. | |
1473 // | |
1474 // The other action codes specify various tactics for decompilation | |
1475 // and recompilation. Action_maybe_recompile is the loosest, and | |
1476 // allows the compiled code to stay around until enough traps are seen, | |
1477 // and until the compiler gets around to recompiling the trapping method. | |
1478 // | |
1479 // The other actions cause immediate removal of the present code. | |
1480 | |
1481 bool update_trap_state = true; | |
1482 bool make_not_entrant = false; | |
1483 bool make_not_compilable = false; | |
1783 | 1484 bool reprofile = false; |
0 | 1485 switch (action) { |
1486 case Action_none: | |
1487 // Keep the old code. | |
1488 update_trap_state = false; | |
1489 break; | |
1490 case Action_maybe_recompile: | |
1491 // Do not need to invalidate the present code, but we can | |
1492 // initiate another | |
1493 // Start compiler without (necessarily) invalidating the nmethod. | |
1494 // The system will tolerate the old code, but new code should be | |
1495 // generated when possible. | |
1496 break; | |
1497 case Action_reinterpret: | |
1498 // Go back into the interpreter for a while, and then consider | |
1499 // recompiling form scratch. | |
1500 make_not_entrant = true; | |
1501 // Reset invocation counter for outer most method. | |
1502 // This will allow the interpreter to exercise the bytecodes | |
1503 // for a while before recompiling. | |
1504 // By contrast, Action_make_not_entrant is immediate. | |
1505 // | |
1506 // Note that the compiler will track null_check, null_assert, | |
1507 // range_check, and class_check events and log them as if they | |
1508 // had been traps taken from compiled code. This will update | |
1509 // the MDO trap history so that the next compilation will | |
1510 // properly detect hot trap sites. | |
1783 | 1511 reprofile = true; |
0 | 1512 break; |
1513 case Action_make_not_entrant: | |
1514 // Request immediate recompilation, and get rid of the old code. | |
1515 // Make them not entrant, so next time they are called they get | |
1516 // recompiled. Unloaded classes are loaded now so recompile before next | |
1517 // time they are called. Same for uninitialized. The interpreter will | |
1518 // link the missing class, if any. | |
1519 make_not_entrant = true; | |
1520 break; | |
1521 case Action_make_not_compilable: | |
1522 // Give up on compiling this method at all. | |
1523 make_not_entrant = true; | |
1524 make_not_compilable = true; | |
1525 break; | |
1526 default: | |
1527 ShouldNotReachHere(); | |
1528 } | |
1529 | |
1530 // Setting +ProfileTraps fixes the following, on all platforms: | |
1531 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
1532 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
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1533 // recompile relies on a MethodData* to record heroic opt failures. |
0 | 1534 |
1535 // Whether the interpreter is producing MDO data or not, we also need | |
1536 // to use the MDO to detect hot deoptimization points and control | |
1537 // aggressive optimization. | |
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1538 bool inc_recompile_count = false; |
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1539 ProfileData* pdata = NULL; |
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1540 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
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1541 assert(trap_mdo == get_method_data(thread, trap_method, false), "sanity"); |
0 | 1542 uint this_trap_count = 0; |
1543 bool maybe_prior_trap = false; | |
1544 bool maybe_prior_recompile = false; | |
5114
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1545 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
0 | 1546 //outputs: |
1547 this_trap_count, | |
1548 maybe_prior_trap, | |
1549 maybe_prior_recompile); | |
1550 // Because the interpreter also counts null, div0, range, and class | |
1551 // checks, these traps from compiled code are double-counted. | |
1552 // This is harmless; it just means that the PerXTrapLimit values | |
1553 // are in effect a little smaller than they look. | |
1554 | |
1555 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
1556 if (per_bc_reason != Reason_none) { | |
1557 // Now take action based on the partially known per-BCI history. | |
1558 if (maybe_prior_trap | |
1559 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
1560 // If there are too many traps at this BCI, force a recompile. | |
1561 // This will allow the compiler to see the limit overflow, and | |
1562 // take corrective action, if possible. The compiler generally | |
1563 // does not use the exact PerBytecodeTrapLimit value, but instead | |
1564 // changes its tactics if it sees any traps at all. This provides | |
1565 // a little hysteresis, delaying a recompile until a trap happens | |
1566 // several times. | |
1567 // | |
1568 // Actually, since there is only one bit of counter per BCI, | |
1569 // the possible per-BCI counts are {0,1,(per-method count)}. | |
1570 // This produces accurate results if in fact there is only | |
1571 // one hot trap site, but begins to get fuzzy if there are | |
1572 // many sites. For example, if there are ten sites each | |
1573 // trapping two or more times, they each get the blame for | |
1574 // all of their traps. | |
1575 make_not_entrant = true; | |
1576 } | |
1577 | |
1578 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
1579 if (make_not_entrant && maybe_prior_recompile) { | |
1580 // More than one recompile at this point. | |
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1581 inc_recompile_count = maybe_prior_trap; |
0 | 1582 } |
1583 } else { | |
1584 // For reasons which are not recorded per-bytecode, we simply | |
1585 // force recompiles unconditionally. | |
1586 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
1587 make_not_entrant = true; | |
1588 } | |
1589 | |
1590 // Go back to the compiler if there are too many traps in this method. | |
1591 if (this_trap_count >= (uint)PerMethodTrapLimit) { | |
1592 // If there are too many traps in this method, force a recompile. | |
1593 // This will allow the compiler to see the limit overflow, and | |
1594 // take corrective action, if possible. | |
1595 // (This condition is an unlikely backstop only, because the | |
1596 // PerBytecodeTrapLimit is more likely to take effect first, | |
1597 // if it is applicable.) | |
1598 make_not_entrant = true; | |
1599 } | |
1600 | |
1601 // Here's more hysteresis: If there has been a recompile at | |
1602 // this trap point already, run the method in the interpreter | |
1603 // for a while to exercise it more thoroughly. | |
1604 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
1783 | 1605 reprofile = true; |
0 | 1606 } |
1607 | |
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1608 } |
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1609 |
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1610 // Take requested actions on the method: |
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1611 |
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1612 // Recompile |
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1613 if (make_not_entrant) { |
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1614 if (!nm->make_not_entrant()) { |
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1615 return; // the call did not change nmethod's state |
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1616 } |
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1617 |
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1618 if (pdata != NULL) { |
0 | 1619 // Record the recompilation event, if any. |
1620 int tstate0 = pdata->trap_state(); | |
1621 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
1622 if (tstate1 != tstate0) | |
1623 pdata->set_trap_state(tstate1); | |
1624 } | |
1625 } | |
1626 | |
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1627 if (inc_recompile_count) { |
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1628 trap_mdo->inc_overflow_recompile_count(); |
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1629 if ((uint)trap_mdo->overflow_recompile_count() > |
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1630 (uint)PerBytecodeRecompilationCutoff) { |
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1631 // Give up on the method containing the bad BCI. |
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1632 if (trap_method() == nm->method()) { |
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1633 make_not_compilable = true; |
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1634 } else { |
7998 | 1635 trap_method->set_not_compilable(CompLevel_full_optimization, true, "overflow_recompile_count > PerBytecodeRecompilationCutoff"); |
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1636 // But give grace to the enclosing nm->method(). |
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1637 } |
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1638 } |
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1639 } |
0 | 1640 |
1783 | 1641 // Reprofile |
1642 if (reprofile) { | |
1643 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
0 | 1644 } |
1645 | |
1646 // Give up compiling | |
1783 | 1647 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
0 | 1648 assert(make_not_entrant, "consistent"); |
1783 | 1649 nm->method()->set_not_compilable(CompLevel_full_optimization); |
0 | 1650 } |
1651 | |
1652 } // Free marked resources | |
1653 | |
1654 } | |
1655 JRT_END | |
1656 | |
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1657 MethodData* |
0 | 1658 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
1659 bool create_if_missing) { | |
1660 Thread* THREAD = thread; | |
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1661 MethodData* mdo = m()->method_data(); |
0 | 1662 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
1663 // Build an MDO. Ignore errors like OutOfMemory; | |
1664 // that simply means we won't have an MDO to update. | |
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1665 Method::build_interpreter_method_data(m, THREAD); |
0 | 1666 if (HAS_PENDING_EXCEPTION) { |
1667 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
1668 CLEAR_PENDING_EXCEPTION; | |
1669 } | |
1670 mdo = m()->method_data(); | |
1671 } | |
1672 return mdo; | |
1673 } | |
1674 | |
1675 ProfileData* | |
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1676 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
0 | 1677 int trap_bci, |
1678 Deoptimization::DeoptReason reason, | |
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1679 bool update_total_trap_count, |
0 | 1680 //outputs: |
1681 uint& ret_this_trap_count, | |
1682 bool& ret_maybe_prior_trap, | |
1683 bool& ret_maybe_prior_recompile) { | |
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1684 bool maybe_prior_trap = false; |
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1685 bool maybe_prior_recompile = false; |
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1686 uint this_trap_count = 0; |
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1687 if (update_total_trap_count) { |
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1688 uint prior_trap_count = trap_mdo->trap_count(reason); |
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1689 this_trap_count = trap_mdo->inc_trap_count(reason); |
0 | 1690 |
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1691 // If the runtime cannot find a place to store trap history, |
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1692 // it is estimated based on the general condition of the method. |
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1693 // If the method has ever been recompiled, or has ever incurred |
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1694 // a trap with the present reason , then this BCI is assumed |
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1695 // (pessimistically) to be the culprit. |
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1696 maybe_prior_trap = (prior_trap_count != 0); |
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1697 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1698 } |
0 | 1699 |
1700 // For reasons which are recorded per bytecode, we check per-BCI data. | |
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1701 ProfileData* pdata = NULL; |
0 | 1702 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); |
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1703 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
0 | 1704 if (per_bc_reason != Reason_none) { |
1705 // Find the profile data for this BCI. If there isn't one, | |
1706 // try to allocate one from the MDO's set of spares. | |
1707 // This will let us detect a repeated trap at this point. | |
1708 pdata = trap_mdo->allocate_bci_to_data(trap_bci); | |
1709 | |
1710 if (pdata != NULL) { | |
1711 // Query the trap state of this profile datum. | |
1712 int tstate0 = pdata->trap_state(); | |
1713 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
1714 maybe_prior_trap = false; | |
1715 if (!trap_state_is_recompiled(tstate0)) | |
1716 maybe_prior_recompile = false; | |
1717 | |
1718 // Update the trap state of this profile datum. | |
1719 int tstate1 = tstate0; | |
1720 // Record the reason. | |
1721 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
1722 // Store the updated state on the MDO, for next time. | |
1723 if (tstate1 != tstate0) | |
1724 pdata->set_trap_state(tstate1); | |
1725 } else { | |
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1726 if (LogCompilation && xtty != NULL) { |
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1727 ttyLocker ttyl; |
0 | 1728 // Missing MDP? Leave a small complaint in the log. |
1729 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1730 } |
0 | 1731 } |
1732 } | |
1733 | |
1734 // Return results: | |
1735 ret_this_trap_count = this_trap_count; | |
1736 ret_maybe_prior_trap = maybe_prior_trap; | |
1737 ret_maybe_prior_recompile = maybe_prior_recompile; | |
1738 return pdata; | |
1739 } | |
1740 | |
1741 void | |
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1742 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 1743 ResourceMark rm; |
1744 // Ignored outputs: | |
1745 uint ignore_this_trap_count; | |
1746 bool ignore_maybe_prior_trap; | |
1747 bool ignore_maybe_prior_recompile; | |
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1748 // Graal uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
5130 | 1749 bool update_total_counts = GRAAL_ONLY(false) NOT_GRAAL(true); |
0 | 1750 query_update_method_data(trap_mdo, trap_bci, |
1751 (DeoptReason)reason, | |
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1752 update_total_counts, |
0 | 1753 ignore_this_trap_count, |
1754 ignore_maybe_prior_trap, | |
1755 ignore_maybe_prior_recompile); | |
1756 } | |
1757 | |
1758 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request) { | |
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1759 if (TraceDeoptimization) { |
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1760 tty->print("Uncommon trap "); |
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1761 } |
0 | 1762 // Still in Java no safepoints |
1763 { | |
1764 // This enters VM and may safepoint | |
1765 uncommon_trap_inner(thread, trap_request); | |
1766 } | |
1767 return fetch_unroll_info_helper(thread); | |
1768 } | |
1769 | |
1770 // Local derived constants. | |
1771 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
1772 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
1773 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
1774 | |
1775 //---------------------------trap_state_reason--------------------------------- | |
1776 Deoptimization::DeoptReason | |
1777 Deoptimization::trap_state_reason(int trap_state) { | |
1778 // This assert provides the link between the width of DataLayout::trap_bits | |
1779 // and the encoding of "recorded" reasons. It ensures there are enough | |
1780 // bits to store all needed reasons in the per-BCI MDO profile. | |
1781 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
1782 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1783 trap_state -= recompile_bit; | |
1784 if (trap_state == DS_REASON_MASK) { | |
1785 return Reason_many; | |
1786 } else { | |
1787 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
1788 return (DeoptReason)trap_state; | |
1789 } | |
1790 } | |
1791 //-------------------------trap_state_has_reason------------------------------- | |
1792 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
1793 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
1794 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
1795 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1796 trap_state -= recompile_bit; | |
1797 if (trap_state == DS_REASON_MASK) { | |
1798 return -1; // true, unspecifically (bottom of state lattice) | |
1799 } else if (trap_state == reason) { | |
1800 return 1; // true, definitely | |
1801 } else if (trap_state == 0) { | |
1802 return 0; // false, definitely (top of state lattice) | |
1803 } else { | |
1804 return 0; // false, definitely | |
1805 } | |
1806 } | |
1807 //-------------------------trap_state_add_reason------------------------------- | |
1808 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
1809 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
1810 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
1811 trap_state -= recompile_bit; | |
1812 if (trap_state == DS_REASON_MASK) { | |
1813 return trap_state + recompile_bit; // already at state lattice bottom | |
1814 } else if (trap_state == reason) { | |
1815 return trap_state + recompile_bit; // the condition is already true | |
1816 } else if (trap_state == 0) { | |
1817 return reason + recompile_bit; // no condition has yet been true | |
1818 } else { | |
1819 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
1820 } | |
1821 } | |
1822 //-----------------------trap_state_is_recompiled------------------------------ | |
1823 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
1824 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
1825 } | |
1826 //-----------------------trap_state_set_recompiled----------------------------- | |
1827 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
1828 if (z) return trap_state | DS_RECOMPILE_BIT; | |
1829 else return trap_state & ~DS_RECOMPILE_BIT; | |
1830 } | |
1831 //---------------------------format_trap_state--------------------------------- | |
1832 // This is used for debugging and diagnostics, including hotspot.log output. | |
1833 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
1834 int trap_state) { | |
1835 DeoptReason reason = trap_state_reason(trap_state); | |
1836 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
1837 // Re-encode the state from its decoded components. | |
1838 int decoded_state = 0; | |
1839 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
1840 decoded_state = trap_state_add_reason(decoded_state, reason); | |
1841 if (recomp_flag) | |
1842 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
1843 // If the state re-encodes properly, format it symbolically. | |
1844 // Because this routine is used for debugging and diagnostics, | |
1845 // be robust even if the state is a strange value. | |
1846 size_t len; | |
1847 if (decoded_state != trap_state) { | |
1848 // Random buggy state that doesn't decode?? | |
1849 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
1850 } else { | |
1851 len = jio_snprintf(buf, buflen, "%s%s", | |
1852 trap_reason_name(reason), | |
1853 recomp_flag ? " recompiled" : ""); | |
1854 } | |
1855 if (len >= buflen) | |
1856 buf[buflen-1] = '\0'; | |
1857 return buf; | |
1858 } | |
1859 | |
1860 | |
1861 //--------------------------------statics-------------------------------------- | |
1862 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
1863 = Deoptimization::Action_reinterpret; | |
1864 const char* Deoptimization::_trap_reason_name[Reason_LIMIT] = { | |
1865 // Note: Keep this in sync. with enum DeoptReason. | |
1866 "none", | |
1867 "null_check", | |
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1868 "null_assert" GRAAL_ONLY("|unreached0"), |
0 | 1869 "range_check", |
1870 "class_check", | |
1871 "array_check", | |
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1872 "intrinsic" GRAAL_ONLY("|type_checked_inlining"), |
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1873 "bimorphic" GRAAL_ONLY("|optimized_type_check"), |
0 | 1874 "unloaded", |
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1875 "uninitialized" GRAAL_ONLY("|unresolved"), |
0 | 1876 "unreached", |
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1877 "unhandled" GRAAL_ONLY("|not_compiled_exception_handler"), |
0 | 1878 "constraint", |
1879 "div0_check", | |
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1880 "age" GRAAL_ONLY("|jsr_mismatch"), |
3345 | 1881 "predicate", |
1882 "loop_limit_check" | |
0 | 1883 }; |
1884 const char* Deoptimization::_trap_action_name[Action_LIMIT] = { | |
1885 // Note: Keep this in sync. with enum DeoptAction. | |
1886 "none", | |
1887 "maybe_recompile", | |
1888 "reinterpret", | |
1889 "make_not_entrant", | |
1890 "make_not_compilable" | |
1891 }; | |
1892 | |
1893 const char* Deoptimization::trap_reason_name(int reason) { | |
1894 if (reason == Reason_many) return "many"; | |
1895 if ((uint)reason < Reason_LIMIT) | |
1896 return _trap_reason_name[reason]; | |
1897 static char buf[20]; | |
1898 sprintf(buf, "reason%d", reason); | |
1899 return buf; | |
1900 } | |
1901 const char* Deoptimization::trap_action_name(int action) { | |
1902 if ((uint)action < Action_LIMIT) | |
1903 return _trap_action_name[action]; | |
1904 static char buf[20]; | |
1905 sprintf(buf, "action%d", action); | |
1906 return buf; | |
1907 } | |
1908 | |
1909 // This is used for debugging and diagnostics, including hotspot.log output. | |
1910 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, | |
1911 int trap_request) { | |
1912 jint unloaded_class_index = trap_request_index(trap_request); | |
1913 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
1914 const char* action = trap_action_name(trap_request_action(trap_request)); | |
1915 size_t len; | |
1916 if (unloaded_class_index < 0) { | |
1917 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'", | |
1918 reason, action); | |
1919 } else { | |
1920 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'", | |
1921 reason, action, unloaded_class_index); | |
1922 } | |
1923 if (len >= buflen) | |
1924 buf[buflen-1] = '\0'; | |
1925 return buf; | |
1926 } | |
1927 | |
1928 juint Deoptimization::_deoptimization_hist | |
1929 [Deoptimization::Reason_LIMIT] | |
1930 [1 + Deoptimization::Action_LIMIT] | |
1931 [Deoptimization::BC_CASE_LIMIT] | |
1932 = {0}; | |
1933 | |
1934 enum { | |
1935 LSB_BITS = 8, | |
1936 LSB_MASK = right_n_bits(LSB_BITS) | |
1937 }; | |
1938 | |
1939 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
1940 Bytecodes::Code bc) { | |
1941 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
1942 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
1943 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
1944 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
1945 juint* cases = _deoptimization_hist[reason][1+action]; | |
1946 juint* bc_counter_addr = NULL; | |
1947 juint bc_counter = 0; | |
1948 // Look for an unused counter, or an exact match to this BC. | |
1949 if (bc != Bytecodes::_illegal) { | |
1950 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
1951 juint* counter_addr = &cases[bc_case]; | |
1952 juint counter = *counter_addr; | |
1953 if ((counter == 0 && bc_counter_addr == NULL) | |
1954 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
1955 // this counter is either free or is already devoted to this BC | |
1956 bc_counter_addr = counter_addr; | |
1957 bc_counter = counter | bc; | |
1958 } | |
1959 } | |
1960 } | |
1961 if (bc_counter_addr == NULL) { | |
1962 // Overflow, or no given bytecode. | |
1963 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
1964 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
1965 } | |
1966 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
1967 } | |
1968 | |
1969 jint Deoptimization::total_deoptimization_count() { | |
1970 return _deoptimization_hist[Reason_none][0][0]; | |
1971 } | |
1972 | |
1973 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
1974 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
1975 return _deoptimization_hist[reason][0][0]; | |
1976 } | |
1977 | |
1978 void Deoptimization::print_statistics() { | |
1979 juint total = total_deoptimization_count(); | |
1980 juint account = total; | |
1981 if (total != 0) { | |
1982 ttyLocker ttyl; | |
1983 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
1984 tty->print_cr("Deoptimization traps recorded:"); | |
1985 #define PRINT_STAT_LINE(name, r) \ | |
1986 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
1987 PRINT_STAT_LINE("total", total); | |
1988 // For each non-zero entry in the histogram, print the reason, | |
1989 // the action, and (if specifically known) the type of bytecode. | |
1990 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
1991 for (int action = 0; action < Action_LIMIT; action++) { | |
1992 juint* cases = _deoptimization_hist[reason][1+action]; | |
1993 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
1994 juint counter = cases[bc_case]; | |
1995 if (counter != 0) { | |
1996 char name[1*K]; | |
1997 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
1998 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
1999 bc = Bytecodes::_illegal; | |
2000 sprintf(name, "%s/%s/%s", | |
2001 trap_reason_name(reason), | |
2002 trap_action_name(action), | |
2003 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
2004 juint r = counter >> LSB_BITS; | |
2005 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
2006 account -= r; | |
2007 } | |
2008 } | |
2009 } | |
2010 } | |
2011 if (account != 0) { | |
2012 PRINT_STAT_LINE("unaccounted", account); | |
2013 } | |
2014 #undef PRINT_STAT_LINE | |
2015 if (xtty != NULL) xtty->tail("statistics"); | |
2016 } | |
2017 } | |
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2018 #else // COMPILER2 || SHARK || GRAAL |
0 | 2019 |
2020 | |
2021 // Stubs for C1 only system. | |
2022 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
2023 return false; | |
2024 } | |
2025 | |
2026 const char* Deoptimization::trap_reason_name(int reason) { | |
2027 return "unknown"; | |
2028 } | |
2029 | |
2030 void Deoptimization::print_statistics() { | |
2031 // no output | |
2032 } | |
2033 | |
2034 void | |
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2035 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 2036 // no udpate |
2037 } | |
2038 | |
2039 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
2040 return 0; | |
2041 } | |
2042 | |
2043 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2044 Bytecodes::Code bc) { | |
2045 // no update | |
2046 } | |
2047 | |
2048 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
2049 int trap_state) { | |
2050 jio_snprintf(buf, buflen, "#%d", trap_state); | |
2051 return buf; | |
2052 } | |
2053 | |
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2054 #endif // COMPILER2 || SHARK || GRAAL |